diff options
| -rw-r--r-- | Documentation/filesystems/exofs.txt | 185 | ||||
| -rw-r--r-- | Documentation/scsi/osd.txt | 5 | ||||
| -rw-r--r-- | MAINTAINERS | 1 | ||||
| -rw-r--r-- | fs/Kconfig | 3 | ||||
| -rw-r--r-- | fs/Makefile | 1 | ||||
| -rw-r--r-- | fs/exofs/BUGS | 3 | ||||
| -rw-r--r-- | fs/exofs/Kbuild | 20 | ||||
| -rw-r--r-- | fs/exofs/Kconfig | 13 | ||||
| -rw-r--r-- | fs/exofs/Kconfig.ore | 14 | ||||
| -rw-r--r-- | fs/exofs/common.h | 262 | ||||
| -rw-r--r-- | fs/exofs/dir.c | 661 | ||||
| -rw-r--r-- | fs/exofs/exofs.h | 240 | ||||
| -rw-r--r-- | fs/exofs/file.c | 83 | ||||
| -rw-r--r-- | fs/exofs/inode.c | 1514 | ||||
| -rw-r--r-- | fs/exofs/namei.c | 323 | ||||
| -rw-r--r-- | fs/exofs/ore.c | 1178 | ||||
| -rw-r--r-- | fs/exofs/ore_raid.c | 756 | ||||
| -rw-r--r-- | fs/exofs/ore_raid.h | 62 | ||||
| -rw-r--r-- | fs/exofs/super.c | 1071 | ||||
| -rw-r--r-- | fs/exofs/sys.c | 205 |
20 files changed, 0 insertions, 6600 deletions
diff --git a/Documentation/filesystems/exofs.txt b/Documentation/filesystems/exofs.txt deleted file mode 100644 index 23583a136975..000000000000 --- a/Documentation/filesystems/exofs.txt +++ /dev/null @@ -1,185 +0,0 @@ -=============================================================================== -WHAT IS EXOFS? -=============================================================================== - -exofs is a file system that uses an OSD and exports the API of a normal Linux -file system. Users access exofs like any other local file system, and exofs -will in turn issue commands to the local OSD initiator. - -OSD is a new T10 command set that views storage devices not as a large/flat -array of sectors but as a container of objects, each having a length, quota, -time attributes and more. Each object is addressed by a 64bit ID, and is -contained in a 64bit ID partition. Each object has associated attributes -attached to it, which are integral part of the object and provide metadata about -the object. The standard defines some common obligatory attributes, but user -attributes can be added as needed. - -=============================================================================== -ENVIRONMENT -=============================================================================== - -To use this file system, you need to have an object store to run it on. You -may download a target from: -http://open-osd.org - -See Documentation/scsi/osd.txt for how to setup a working osd environment. - -=============================================================================== -USAGE -=============================================================================== - -1. Download and compile exofs and open-osd initiator: - You need an external Kernel source tree or kernel headers from your - distribution. (anything based on 2.6.26 or later). - - a. download open-osd including exofs source using: - [parent-directory]$ git clone git://git.open-osd.org/open-osd.git - - b. Build the library module like this: - [parent-directory]$ make -C KSRC=$(KER_DIR) open-osd - - This will build both the open-osd initiator as well as the exofs kernel - module. Use whatever parameters you compiled your Kernel with and - $(KER_DIR) above pointing to the Kernel you compile against. See the file - open-osd/top-level-Makefile for an example. - -2. Get the OSD initiator and target set up properly, and login to the target. - See Documentation/scsi/osd.txt for farther instructions. Also see ./do-osd - for example script that does all these steps. - -3. Insmod the exofs.ko module: - [exofs]$ insmod exofs.ko - -4. Make sure the directory where you want to mount exists. If not, create it. - (For example, mkdir /mnt/exofs) - -5. At first run you will need to invoke the mkfs.exofs application - - As an example, this will create the file system on: - /dev/osd0 partition ID 65536 - - mkfs.exofs --pid=65536 --format /dev/osd0 - - The --format is optional. If not specified, no OSD_FORMAT will be - performed and a clean file system will be created in the specified pid, - in the available space of the target. (Use --format=size_in_meg to limit - the total LUN space available) - - If pid already exists, it will be deleted and a new one will be created in - its place. Be careful. - - An exofs lives inside a single OSD partition. You can create multiple exofs - filesystems on the same device using multiple pids. - - (run mkfs.exofs without any parameters for usage help message) - -6. Mount the file system. - - For example, to mount /dev/osd0, partition ID 0x10000 on /mnt/exofs: - - mount -t exofs -o pid=65536 /dev/osd0 /mnt/exofs/ - -7. For reference (See do-exofs example script): - do-exofs start - an example of how to perform the above steps. - do-exofs stop - an example of how to unmount the file system. - do-exofs format - an example of how to format and mkfs a new exofs. - -8. Extra compilation flags (uncomment in fs/exofs/Kbuild): - CONFIG_EXOFS_DEBUG - for debug messages and extra checks. - -=============================================================================== -exofs mount options -=============================================================================== -Similar to any mount command: - mount -t exofs -o exofs_options /dev/osdX mount_exofs_directory - -Where: - -t exofs: specifies the exofs file system - - /dev/osdX: X is a decimal number. /dev/osdX was created after a successful - login into an OSD target. - - mount_exofs_directory: The directory to mount the file system on - - exofs specific options: Options are separated by commas (,) - pid=<integer> - The partition number to mount/create as - container of the filesystem. - This option is mandatory. integer can be - Hex by pre-pending an 0x to the number. - osdname=<id> - Mount by a device's osdname. - osdname is usually a 36 character uuid of the - form "d2683732-c906-4ee1-9dbd-c10c27bb40df". - It is one of the device's uuid specified in the - mkfs.exofs format command. - If this option is specified then the /dev/osdX - above can be empty and is ignored. - to=<integer> - Timeout in ticks for a single command. - default is (60 * HZ) [for debugging only] - -=============================================================================== -DESIGN -=============================================================================== - -* The file system control block (AKA on-disk superblock) resides in an object - with a special ID (defined in common.h). - Information included in the file system control block is used to fill the - in-memory superblock structure at mount time. This object is created before - the file system is used by mkexofs.c. It contains information such as: - - The file system's magic number - - The next inode number to be allocated - -* Each file resides in its own object and contains the data (and it will be - possible to extend the file over multiple objects, though this has not been - implemented yet). - -* A directory is treated as a file, and essentially contains a list of <file - name, inode #> pairs for files that are found in that directory. The object - IDs correspond to the files' inode numbers and will be allocated according to - a bitmap (stored in a separate object). Now they are allocated using a - counter. - -* Each file's control block (AKA on-disk inode) is stored in its object's - attributes. This applies to both regular files and other types (directories, - device files, symlinks, etc.). - -* Credentials are generated per object (inode and superblock) when they are - created in memory (read from disk or created). The credential works for all - operations and is used as long as the object remains in memory. - -* Async OSD operations are used whenever possible, but the target may execute - them out of order. The operations that concern us are create, delete, - readpage, writepage, update_inode, and truncate. The following pairs of - operations should execute in the order written, and we need to prevent them - from executing in reverse order: - - The following are handled with the OBJ_CREATED and OBJ_2BCREATED - flags. OBJ_CREATED is set when we know the object exists on the OSD - - in create's callback function, and when we successfully do a - read_inode. - OBJ_2BCREATED is set in the beginning of the create function, so we - know that we should wait. - - create/delete: delete should wait until the object is created - on the OSD. - - create/readpage: readpage should be able to return a page - full of zeroes in this case. If there was a write already - en-route (i.e. create, writepage, readpage) then the page - would be locked, and so it would really be the same as - create/writepage. - - create/writepage: if writepage is called for a sync write, it - should wait until the object is created on the OSD. - Otherwise, it should just return. - - create/truncate: truncate should wait until the object is - created on the OSD. - - create/update_inode: update_inode should wait until the - object is created on the OSD. - - Handled by VFS locks: - - readpage/delete: shouldn't happen because of page lock. - - writepage/delete: shouldn't happen because of page lock. - - readpage/writepage: shouldn't happen because of page lock. - -=============================================================================== -LICENSE/COPYRIGHT -=============================================================================== -The exofs file system is based on ext2 v0.5b (distributed with the Linux kernel -version 2.6.10). All files include the original copyrights, and the license -is GPL version 2 (only version 2, as is true for the Linux kernel). The -Linux kernel can be downloaded from www.kernel.org. diff --git a/Documentation/scsi/osd.txt b/Documentation/scsi/osd.txt index 5a9879bad073..2bc2ab06b0c0 100644 --- a/Documentation/scsi/osd.txt +++ b/Documentation/scsi/osd.txt @@ -24,11 +24,6 @@ osd-uld: platform, both for the in-kernel initiator as well as connected targets. It currently has no useful user-mode API, though it could have if need be. -exofs: - Is an OSD based Linux file system. It uses the osd-initiator and osd-uld, -to export a usable file system for users. -See Documentation/filesystems/exofs.txt for more details - osd target: There are no current plans for an OSD target implementation in kernel. For all needs, a user-mode target that is based on the scsi tgt target framework is diff --git a/MAINTAINERS b/MAINTAINERS index 6c445a485804..108b340ab625 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -11390,7 +11390,6 @@ M: Boaz Harrosh <ooo@electrozaur.com> S: Maintained F: drivers/scsi/osd/ F: include/scsi/osd_* -F: fs/exofs/ OV2659 OMNIVISION SENSOR DRIVER M: "Lad, Prabhakar" <prabhakar.csengg@gmail.com> diff --git a/fs/Kconfig b/fs/Kconfig index ac474a61be37..2557506051a3 100644 --- a/fs/Kconfig +++ b/fs/Kconfig @@ -254,12 +254,9 @@ source "fs/romfs/Kconfig" source "fs/pstore/Kconfig" source "fs/sysv/Kconfig" source "fs/ufs/Kconfig" -source "fs/exofs/Kconfig" endif # MISC_FILESYSTEMS -source "fs/exofs/Kconfig.ore" - menuconfig NETWORK_FILESYSTEMS bool "Network File Systems" default y diff --git a/fs/Makefile b/fs/Makefile index 293733f61594..4a930ee78d68 100644 --- a/fs/Makefile +++ b/fs/Makefile @@ -124,7 +124,6 @@ obj-$(CONFIG_OCFS2_FS) += ocfs2/ obj-$(CONFIG_BTRFS_FS) += btrfs/ obj-$(CONFIG_GFS2_FS) += gfs2/ obj-$(CONFIG_F2FS_FS) += f2fs/ -obj-y += exofs/ # Multiple modules obj-$(CONFIG_CEPH_FS) += ceph/ obj-$(CONFIG_PSTORE) += pstore/ obj-$(CONFIG_EFIVAR_FS) += efivarfs/ diff --git a/fs/exofs/BUGS b/fs/exofs/BUGS deleted file mode 100644 index 1b2d4c63a579..000000000000 --- a/fs/exofs/BUGS +++ /dev/null @@ -1,3 +0,0 @@ -- Out-of-space may cause a severe problem if the object (and directory entry) - were written, but the inode attributes failed. Then if the filesystem was - unmounted and mounted the kernel can get into an endless loop doing a readdir. diff --git a/fs/exofs/Kbuild b/fs/exofs/Kbuild deleted file mode 100644 index a364fd0965ec..000000000000 --- a/fs/exofs/Kbuild +++ /dev/null @@ -1,20 +0,0 @@ -# -# Kbuild for the EXOFS module -# -# Copyright (C) 2008 Panasas Inc. All rights reserved. -# -# Authors: -# Boaz Harrosh <ooo@electrozaur.com> -# -# This program is free software; you can redistribute it and/or modify -# it under the terms of the GNU General Public License version 2 -# -# Kbuild - Gets included from the Kernels Makefile and build system -# - -# ore module library -libore-y := ore.o ore_raid.o -obj-$(CONFIG_ORE) += libore.o - -exofs-y := inode.o file.o namei.o dir.o super.o sys.o -obj-$(CONFIG_EXOFS_FS) += exofs.o diff --git a/fs/exofs/Kconfig b/fs/exofs/Kconfig deleted file mode 100644 index 86194b2f799d..000000000000 --- a/fs/exofs/Kconfig +++ /dev/null @@ -1,13 +0,0 @@ -config EXOFS_FS - tristate "exofs: OSD based file system support" - depends on SCSI_OSD_ULD - help - EXOFS is a file system that uses an OSD storage device, - as its backing storage. - -# Debugging-related stuff -config EXOFS_DEBUG - bool "Enable debugging" - depends on EXOFS_FS - help - This option enables EXOFS debug prints. diff --git a/fs/exofs/Kconfig.ore b/fs/exofs/Kconfig.ore deleted file mode 100644 index 2daf2329c28d..000000000000 --- a/fs/exofs/Kconfig.ore +++ /dev/null @@ -1,14 +0,0 @@ -# ORE - Objects Raid Engine (libore.ko) -# -# Note ORE needs to "select ASYNC_XOR". So Not to force multiple selects -# for every ORE user we do it like this. Any user should add itself here -# at the "depends on EXOFS_FS || ..." with an ||. The dependencies are -# selected here, and we default to "ON". So in effect it is like been -# selected by any of the users. -config ORE - tristate - depends on EXOFS_FS || PNFS_OBJLAYOUT - select ASYNC_XOR - select RAID6_PQ - select ASYNC_PQ - default SCSI_OSD_ULD diff --git a/fs/exofs/common.h b/fs/exofs/common.h deleted file mode 100644 index 7d88ef566213..000000000000 --- a/fs/exofs/common.h +++ /dev/null @@ -1,262 +0,0 @@ -/* - * common.h - Common definitions for both Kernel and user-mode utilities - * - * Copyright (C) 2005, 2006 - * Avishay Traeger (avishay@gmail.com) - * Copyright (C) 2008, 2009 - * Boaz Harrosh <ooo@electrozaur.com> - * - * Copyrights for code taken from ext2: - * Copyright (C) 1992, 1993, 1994, 1995 - * Remy Card (card@masi.ibp.fr) - * Laboratoire MASI - Institut Blaise Pascal - * Universite Pierre et Marie Curie (Paris VI) - * from - * linux/fs/minix/inode.c - * Copyright (C) 1991, 1992 Linus Torvalds - * - * This file is part of exofs. - * - * exofs is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation. Since it is based on ext2, and the only - * valid version of GPL for the Linux kernel is version 2, the only valid - * version of GPL for exofs is version 2. - * - * exofs is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with exofs; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#ifndef __EXOFS_COM_H__ -#define __EXOFS_COM_H__ - -#include <linux/types.h> - -#include <scsi/osd_attributes.h> -#include <scsi/osd_initiator.h> -#include <scsi/osd_sec.h> - -/**************************************************************************** - * Object ID related defines - * NOTE: inode# = object ID - EXOFS_OBJ_OFF - ****************************************************************************/ -#define EXOFS_MIN_PID 0x10000 /* Smallest partition ID */ -#define EXOFS_OBJ_OFF 0x10000 /* offset for objects */ -#define EXOFS_SUPER_ID 0x10000 /* object ID for on-disk superblock */ -#define EXOFS_DEVTABLE_ID 0x10001 /* object ID for on-disk device table */ -#define EXOFS_ROOT_ID 0x10002 /* object ID for root directory */ - -/* exofs Application specific page/attribute */ -/* Inode attrs */ -# define EXOFS_APAGE_FS_DATA (OSD_APAGE_APP_DEFINED_FIRST + 3) -# define EXOFS_ATTR_INODE_DATA 1 -# define EXOFS_ATTR_INODE_FILE_LAYOUT 2 -# define EXOFS_ATTR_INODE_DIR_LAYOUT 3 -/* Partition attrs */ -# define EXOFS_APAGE_SB_DATA (0xF0000000U + 3) -# define EXOFS_ATTR_SB_STATS 1 - -/* - * The maximum number of files we can have is limited by the size of the - * inode number. This is the largest object ID that the file system supports. - * Object IDs 0, 1, and 2 are always in use (see above defines). - */ -enum { - EXOFS_MAX_INO_ID = (sizeof(ino_t) * 8 == 64) ? ULLONG_MAX : - (1ULL << (sizeof(ino_t) * 8ULL - 1ULL)), - EXOFS_MAX_ID = (EXOFS_MAX_INO_ID - 1 - EXOFS_OBJ_OFF), -}; - -/**************************************************************************** - * Misc. - ****************************************************************************/ -#define EXOFS_BLKSHIFT 12 -#define EXOFS_BLKSIZE (1UL << EXOFS_BLKSHIFT) - -/**************************************************************************** - * superblock-related things - ****************************************************************************/ -#define EXOFS_SUPER_MAGIC 0x5DF5 - -/* - * The file system control block - stored in object EXOFS_SUPER_ID's data. - * This is where the in-memory superblock is stored on disk. - */ -enum {EXOFS_FSCB_VER = 1, EXOFS_DT_VER = 1}; -struct exofs_fscb { - __le64 s_nextid; /* Only used after mkfs */ - __le64 s_numfiles; /* Only used after mkfs */ - __le32 s_version; /* == EXOFS_FSCB_VER */ - __le16 s_magic; /* Magic signature */ - __le16 s_newfs; /* Non-zero if this is a new fs */ - - /* From here on it's a static part, only written by mkexofs */ - __le64 s_dev_table_oid; /* Resurved, not used */ - __le64 s_dev_table_count; /* == 0 means no dev_table */ -} __packed; - -/* - * This struct is set on the FS partition's attributes. - * [EXOFS_APAGE_SB_DATA, EXOFS_ATTR_SB_STATS] and is written together - * with the create command, to atomically persist the sb writeable information. - */ -struct exofs_sb_stats { - __le64 s_nextid; /* Highest object ID used */ - __le64 s_numfiles; /* Number of files on fs */ -} __packed; - -/* - * Describes the raid used in the FS. It is part of the device table. - * This here is taken from the pNFS-objects definition. In exofs we - * use one raid policy through-out the filesystem. (NOTE: the funny - * alignment at beginning. We take care of it at exofs_device_table. - */ -struct exofs_dt_data_map { - __le32 cb_num_comps; - __le64 cb_stripe_unit; - __le32 cb_group_width; - __le32 cb_group_depth; - __le32 cb_mirror_cnt; - __le32 cb_raid_algorithm; -} __packed; - -/* - * This is an osd device information descriptor. It is a single entry in - * the exofs device table. It describes an osd target lun which - * contains data belonging to this FS. (Same partition_id on all devices) - */ -struct exofs_dt_device_info { - __le32 systemid_len; - u8 systemid[OSD_SYSTEMID_LEN]; - __le64 long_name_offset; /* If !0 then offset-in-file */ - __le32 osdname_len; /* */ - u8 osdname[44]; /* Embbeded, Usually an asci uuid */ -} __packed; - -/* - * The EXOFS device table - stored in object EXOFS_DEVTABLE_ID's data. - * It contains the raid used for this multy-device FS and an array of - * participating devices. - */ -struct exofs_device_table { - __le32 dt_version; /* == EXOFS_DT_VER */ - struct exofs_dt_data_map dt_data_map; /* Raid policy to use */ - - /* Resurved space For future use. Total includeing this: - * (8 * sizeof(le64)) - */ - __le64 __Resurved[4]; - - __le64 dt_num_devices; /* Array size */ - struct exofs_dt_device_info dt_dev_table[]; /* Array of devices */ -} __packed; - -/**************************************************************************** - * inode-related things - ****************************************************************************/ -#define EXOFS_IDATA 5 - -/* - * The file control block - stored in an object's attributes. This is where - * the in-memory inode is stored on disk. - */ -struct exofs_fcb { - __le64 i_size; /* Size of the file */ - __le16 i_mode; /* File mode */ - __le16 i_links_count; /* Links count */ - __le32 i_uid; /* Owner Uid */ - __le32 i_gid; /* Group Id */ - __le32 i_atime; /* Access time */ - __le32 i_ctime; /* Creation time */ - __le32 i_mtime; /* Modification time */ - __le32 i_flags; /* File flags (unused for now)*/ - __le32 i_generation; /* File version (for NFS) */ - __le32 i_data[EXOFS_IDATA]; /* Short symlink names and device #s */ -}; - -#define EXOFS_INO_ATTR_SIZE sizeof(struct exofs_fcb) - -/* This is the Attribute the fcb is stored in */ -static const struct __weak osd_attr g_attr_inode_data = ATTR_DEF( - EXOFS_APAGE_FS_DATA, - EXOFS_ATTR_INODE_DATA, - EXOFS_INO_ATTR_SIZE); - -/**************************************************************************** - * dentry-related things - ****************************************************************************/ -#define EXOFS_NAME_LEN 255 - -/* - * The on-disk directory entry - */ -struct exofs_dir_entry { - __le64 inode_no; /* inode number */ - __le16 rec_len; /* directory entry length */ - u8 name_len; /* name length */ - u8 file_type; /* umm...file type */ - char name[EXOFS_NAME_LEN]; /* file name */ -}; - -enum { - EXOFS_FT_UNKNOWN, - EXOFS_FT_REG_FILE, - EXOFS_FT_DIR, - EXOFS_FT_CHRDEV, - EXOFS_FT_BLKDEV, - EXOFS_FT_FIFO, - EXOFS_FT_SOCK, - EXOFS_FT_SYMLINK, - EXOFS_FT_MAX -}; - -#define EXOFS_DIR_PAD 4 -#define EXOFS_DIR_ROUND (EXOFS_DIR_PAD - 1) -#define EXOFS_DIR_REC_LEN(name_len) \ - (((name_len) + offsetof(struct exofs_dir_entry, name) + \ - EXOFS_DIR_ROUND) & ~EXOFS_DIR_ROUND) - -/* - * The on-disk (optional) layout structure. - * sits in an EXOFS_ATTR_INODE_FILE_LAYOUT or EXOFS_ATTR_INODE_DIR_LAYOUT - * attribute, attached to any inode, usually to a directory. - */ - -enum exofs_inode_layout_gen_functions { - LAYOUT_MOVING_WINDOW = 0, - LAYOUT_IMPLICT = 1, -}; - -struct exofs_on_disk_inode_layout { - __le16 gen_func; /* One of enum exofs_inode_layout_gen_functions */ - __le16 pad; - union { - /* gen_func == LAYOUT_MOVING_WINDOW (default) */ - struct exofs_layout_sliding_window { - __le32 num_devices; /* first n devices in global-table*/ - } sliding_window __packed; - - /* gen_func == LAYOUT_IMPLICT */ - struct exofs_layout_implict_list { - struct exofs_dt_data_map data_map; - /* Variable array of size data_map.cb_num_comps. These - * are device indexes of the devices in the global table - */ - __le32 dev_indexes[]; - } implict __packed; - }; -} __packed; - -static inline size_t exofs_on_disk_inode_layout_size(unsigned max_devs) -{ - return sizeof(struct exofs_on_disk_inode_layout) + - max_devs * sizeof(__le32); -} - -#endif /*ifndef __EXOFS_COM_H__*/ diff --git a/fs/exofs/dir.c b/fs/exofs/dir.c deleted file mode 100644 index f0138674c1ed..000000000000 --- a/fs/exofs/dir.c +++ /dev/null @@ -1,661 +0,0 @@ -/* - * Copyright (C) 2005, 2006 - * Avishay Traeger (avishay@gmail.com) - * Copyright (C) 2008, 2009 - * Boaz Harrosh <ooo@electrozaur.com> - * - * Copyrights for code taken from ext2: - * Copyright (C) 1992, 1993, 1994, 1995 - * Remy Card (card@masi.ibp.fr) - * Laboratoire MASI - Institut Blaise Pascal - * Universite Pierre et Marie Curie (Paris VI) - * from - * linux/fs/minix/inode.c - * Copyright (C) 1991, 1992 Linus Torvalds - * - * This file is part of exofs. - * - * exofs is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation. Since it is based on ext2, and the only - * valid version of GPL for the Linux kernel is version 2, the only valid - * version of GPL for exofs is version 2. - * - * exofs is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with exofs; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include <linux/iversion.h> -#include "exofs.h" - -static inline unsigned exofs_chunk_size(struct inode *inode) -{ - return inode->i_sb->s_blocksize; -} - -static inline void exofs_put_page(struct page *page) -{ - kunmap(page); - put_page(page); -} - -static unsigned exofs_last_byte(struct inode *inode, unsigned long page_nr) -{ - loff_t last_byte = inode->i_size; - - last_byte -= page_nr << PAGE_SHIFT; - if (last_byte > PAGE_SIZE) - last_byte = PAGE_SIZE; - return last_byte; -} - -static int exofs_commit_chunk(struct page *page, loff_t pos, unsigned len) -{ - struct address_space *mapping = page->mapping; - struct inode *dir = mapping->host; - int err = 0; - - inode_inc_iversion(dir); - - if (!PageUptodate(page)) - SetPageUptodate(page); - - if (pos+len > dir->i_size) { - i_size_write(dir, pos+len); - mark_inode_dirty(dir); - } - set_page_dirty(page); - - if (IS_DIRSYNC(dir)) - err = write_one_page(page); - else - unlock_page(page); - - return err; -} - -static bool exofs_check_page(struct page *page) -{ - struct inode *dir = page->mapping->host; - unsigned chunk_size = exofs_chunk_size(dir); - char *kaddr = page_address(page); - unsigned offs, rec_len; - unsigned limit = PAGE_SIZE; - struct exofs_dir_entry *p; - char *error; - - /* if the page is the last one in the directory */ - if ((dir->i_size >> PAGE_SHIFT) == page->index) { - limit = dir->i_size & ~PAGE_MASK; - if (limit & (chunk_size - 1)) - goto Ebadsize; - if (!limit) - goto out; - } - for (offs = 0; offs <= limit - EXOFS_DIR_REC_LEN(1); offs += rec_len) { - p = (struct exofs_dir_entry *)(kaddr + offs); - rec_len = le16_to_cpu(p->rec_len); - - if (rec_len < EXOFS_DIR_REC_LEN(1)) - goto Eshort; - if (rec_len & 3) - goto Ealign; - if (rec_len < EXOFS_DIR_REC_LEN(p->name_len)) - goto Enamelen; - if (((offs + rec_len - 1) ^ offs) & ~(chunk_size-1)) - goto Espan; - } - if (offs != limit) - goto Eend; -out: - SetPageChecked(page); - return true; - -Ebadsize: - EXOFS_ERR("ERROR [exofs_check_page]: " - "size of directory(0x%lx) is not a multiple of chunk size\n", - dir->i_ino - ); - goto fail; -Eshort: - error = "rec_len is smaller than minimal"; - goto bad_entry; -Ealign: - error = "unaligned directory entry"; - goto bad_entry; -Enamelen: - error = "rec_len is too small for name_len"; - goto bad_entry; -Espan: - error = "directory entry across blocks"; - goto bad_entry; -bad_entry: - EXOFS_ERR( - "ERROR [exofs_check_page]: bad entry in directory(0x%lx): %s - " - "offset=%lu, inode=0x%llx, rec_len=%d, name_len=%d\n", - dir->i_ino, error, (page->index<<PAGE_SHIFT)+offs, - _LLU(le64_to_cpu(p->inode_no)), - rec_len, p->name_len); - goto fail; -Eend: - p = (struct exofs_dir_entry *)(kaddr + offs); - EXOFS_ERR("ERROR [exofs_check_page]: " - "entry in directory(0x%lx) spans the page boundary" - "offset=%lu, inode=0x%llx\n", - dir->i_ino, (page->index<<PAGE_SHIFT)+offs, - _LLU(le64_to_cpu(p->inode_no))); -fail: - SetPageError(page); - return false; -} - -static struct page *exofs_get_page(struct inode *dir, unsigned long n) -{ - struct address_space *mapping = dir->i_mapping; - struct page *page = read_mapping_page(mapping, n, NULL); - - if (!IS_ERR(page)) { - kmap(page); - if (unlikely(!PageChecked(page))) { - if (PageError(page) || !exofs_check_page(page)) - goto fail; - } - } - return page; - -fail: - exofs_put_page(page); - return ERR_PTR(-EIO); -} - -static inline int exofs_match(int len, const unsigned char *name, - struct exofs_dir_entry *de) -{ - if (len != de->name_len) - return 0; - if (!de->inode_no) - return 0; - return !memcmp(name, de->name, len); -} - -static inline -struct exofs_dir_entry *exofs_next_entry(struct exofs_dir_entry *p) -{ - return (struct exofs_dir_entry *)((char *)p + le16_to_cpu(p->rec_len)); -} - -static inline unsigned -exofs_validate_entry(char *base, unsigned offset, unsigned mask) -{ - struct exofs_dir_entry *de = (struct exofs_dir_entry *)(base + offset); - struct exofs_dir_entry *p = - (struct exofs_dir_entry *)(base + (offset&mask)); - while ((char *)p < (char *)de) { - if (p->rec_len == 0) - break; - p = exofs_next_entry(p); - } - return (char *)p - base; -} - -static unsigned char exofs_filetype_table[EXOFS_FT_MAX] = { - [EXOFS_FT_UNKNOWN] = DT_UNKNOWN, - [EXOFS_FT_REG_FILE] = DT_REG, - [EXOFS_FT_DIR] = DT_DIR, - [EXOFS_FT_CHRDEV] = DT_CHR, - [EXOFS_FT_BLKDEV] = DT_BLK, - [EXOFS_FT_FIFO] = DT_FIFO, - [EXOFS_FT_SOCK] = DT_SOCK, - [EXOFS_FT_SYMLINK] = DT_LNK, -}; - -#define S_SHIFT 12 -static unsigned char exofs_type_by_mode[S_IFMT >> S_SHIFT] = { - [S_IFREG >> S_SHIFT] = EXOFS_FT_REG_FILE, - [S_IFDIR >> S_SHIFT] = EXOFS_FT_DIR, - [S_IFCHR >> S_SHIFT] = EXOFS_FT_CHRDEV, - [S_IFBLK >> S_SHIFT] = EXOFS_FT_BLKDEV, - [S_IFIFO >> S_SHIFT] = EXOFS_FT_FIFO, - [S_IFSOCK >> S_SHIFT] = EXOFS_FT_SOCK, - [S_IFLNK >> S_SHIFT] = EXOFS_FT_SYMLINK, -}; - -static inline -void exofs_set_de_type(struct exofs_dir_entry *de, struct inode *inode) -{ - umode_t mode = inode->i_mode; - de->file_type = exofs_type_by_mode[(mode & S_IFMT) >> S_SHIFT]; -} - -static int -exofs_readdir(struct file *file, struct dir_context *ctx) -{ - loff_t pos = ctx->pos; - struct inode *inode = file_inode(file); - unsigned int offset = pos & ~PAGE_MASK; - unsigned long n = pos >> PAGE_SHIFT; - unsigned long npages = dir_pages(inode); - unsigned chunk_mask = ~(exofs_chunk_size(inode)-1); - bool need_revalidate = !inode_eq_iversion(inode, file->f_version); - - if (pos > inode->i_size - EXOFS_DIR_REC_LEN(1)) - return 0; - - for ( ; n < npages; n++, offset = 0) { - char *kaddr, *limit; - struct exofs_dir_entry *de; - struct page *page = exofs_get_page(inode, n); - - if (IS_ERR(page)) { - EXOFS_ERR("ERROR: bad page in directory(0x%lx)\n", - inode->i_ino); - ctx->pos += PAGE_SIZE - offset; - return PTR_ERR(page); - } - kaddr = page_address(page); - if (unlikely(need_revalidate)) { - if (offset) { - offset = exofs_validate_entry(kaddr, offset, - chunk_mask); - ctx->pos = (n<<PAGE_SHIFT) + offset; - } - file->f_version = inode_query_iversion(inode); - need_revalidate = false; - } - de = (struct exofs_dir_entry *)(kaddr + offset); - limit = kaddr + exofs_last_byte(inode, n) - - EXOFS_DIR_REC_LEN(1); - for (; (char *)de <= limit; de = exofs_next_entry(de)) { - if (de->rec_len == 0) { - EXOFS_ERR("ERROR: " - "zero-length entry in directory(0x%lx)\n", - inode->i_ino); - exofs_put_page(page); - return -EIO; - } - if (de->inode_no) { - unsigned char t; - - if (de->file_type < EXOFS_FT_MAX) - t = exofs_filetype_table[de->file_type]; - else - t = DT_UNKNOWN; - - if (!dir_emit(ctx, de->name, de->name_len, - le64_to_cpu(de->inode_no), - t)) { - exofs_put_page(page); - return 0; - } - } - ctx->pos += le16_to_cpu(de->rec_len); - } - exofs_put_page(page); - } - return 0; -} - -struct exofs_dir_entry *exofs_find_entry(struct inode *dir, - struct dentry *dentry, struct page **res_page) -{ - const unsigned char *name = dentry->d_name.name; - int namelen = dentry->d_name.len; - unsigned reclen = EXOFS_DIR_REC_LEN(namelen); - unsigned long start, n; - unsigned long npages = dir_pages(dir); - struct page *page = NULL; - struct exofs_i_info *oi = exofs_i(dir); - struct exofs_dir_entry *de; - - if (npages == 0) - goto out; - - *res_page = NULL; - - start = oi->i_dir_start_lookup; - if (start >= npages) - start = 0; - n = start; - do { - char *kaddr; - page = exofs_get_page(dir, n); - if (!IS_ERR(page)) { - kaddr = page_address(page); - de = (struct exofs_dir_entry *) kaddr; - kaddr += exofs_last_byte(dir, n) - reclen; - while ((char *) de <= kaddr) { - if (de->rec_len == 0) { - EXOFS_ERR("ERROR: zero-length entry in " - "directory(0x%lx)\n", - dir->i_ino); - exofs_put_page(page); - goto out; - } - if (exofs_match(namelen, name, de)) - goto found; - de = exofs_next_entry(de); - } - exofs_put_page(page); - } - if (++n >= npages) - n = 0; - } while (n != start); -out: - return NULL; - -found: - *res_page = page; - oi->i_dir_start_lookup = n; - return de; -} - -struct exofs_dir_entry *exofs_dotdot(struct inode *dir, struct page **p) -{ - struct page *page = exofs_get_page(dir, 0); - struct exofs_dir_entry *de = NULL; - - if (!IS_ERR(page)) { - de = exofs_next_entry( - (struct exofs_dir_entry *)page_address(page)); - *p = page; - } - return de; -} - -ino_t exofs_parent_ino(struct dentry *child) -{ - struct page *page; - struct exofs_dir_entry *de; - ino_t ino; - - de = exofs_dotdot(d_inode(child), &page); - if (!de) - return 0; - - ino = le64_to_cpu(de->inode_no); - exofs_put_page(page); - return ino; -} - -ino_t exofs_inode_by_name(struct inode *dir, struct dentry *dentry) -{ - ino_t res = 0; - struct exofs_dir_entry *de; - struct page *page; - - de = exofs_find_entry(dir, dentry, &page); - if (de) { - res = le64_to_cpu(de->inode_no); - exofs_put_page(page); - } - return res; -} - -int exofs_set_link(struct inode *dir, struct exofs_dir_entry *de, - struct page *page, struct inode *inode) -{ - loff_t pos = page_offset(page) + - (char *) de - (char *) page_address(page); - unsigned len = le16_to_cpu(de->rec_len); - int err; - - lock_page(page); - err = exofs_write_begin(NULL, page->mapping, pos, len, 0, &page, NULL); - if (err) - EXOFS_ERR("exofs_set_link: exofs_write_begin FAILED => %d\n", - err); - - de->inode_no = cpu_to_le64(inode->i_ino); - exofs_set_de_type(de, inode); - if (likely(!err)) - err = exofs_commit_chunk(page, pos, len); - exofs_put_page(page); - dir->i_mtime = dir->i_ctime = current_time(dir); - mark_inode_dirty(dir); - return err; -} - -int exofs_add_link(struct dentry *dentry, struct inode *inode) -{ - struct inode *dir = d_inode(dentry->d_parent); - const unsigned char *name = dentry->d_name.name; - int namelen = dentry->d_name.len; - unsigned chunk_size = exofs_chunk_size(dir); - unsigned reclen = EXOFS_DIR_REC_LEN(namelen); - unsigned short rec_len, name_len; - struct page *page = NULL; - struct exofs_sb_info *sbi = inode->i_sb->s_fs_info; - struct exofs_dir_entry *de; - unsigned long npages = dir_pages(dir); - unsigned long n; - char *kaddr; - loff_t pos; - int err; - - for (n = 0; n <= npages; n++) { - char *dir_end; - - page = exofs_get_page(dir, n); - err = PTR_ERR(page); - if (IS_ERR(page)) - goto out; - lock_page(page); - kaddr = page_address(page); - dir_end = kaddr + exofs_last_byte(dir, n); - de = (struct exofs_dir_entry *)kaddr; - kaddr += PAGE_SIZE - reclen; - while ((char *)de <= kaddr) { - if ((char *)de == dir_end) { - name_len = 0; - rec_len = chunk_size; - de->rec_len = cpu_to_le16(chunk_size); - de->inode_no = 0; - goto got_it; - } - if (de->rec_len == 0) { - EXOFS_ERR("ERROR: exofs_add_link: " - "zero-length entry in directory(0x%lx)\n", - inode->i_ino); - err = -EIO; - goto out_unlock; - } - err = -EEXIST; - if (exofs_match(namelen, name, de)) - goto out_unlock; - name_len = EXOFS_DIR_REC_LEN(de->name_len); - rec_len = le16_to_cpu(de->rec_len); - if (!de->inode_no && rec_len >= reclen) - goto got_it; - if (rec_len >= name_len + reclen) - goto got_it; - de = (struct exofs_dir_entry *) ((char *) de + rec_len); - } - unlock_page(page); - exofs_put_page(page); - } - - EXOFS_ERR("exofs_add_link: BAD dentry=%p or inode=0x%lx\n", - dentry, inode->i_ino); - return -EINVAL; - -got_it: - pos = page_offset(page) + - (char *)de - (char *)page_address(page); - err = exofs_write_begin(NULL, page->mapping, pos, rec_len, 0, - &page, NULL); - if (err) - goto out_unlock; - if (de->inode_no) { - struct exofs_dir_entry *de1 = - (struct exofs_dir_entry *)((char *)de + name_len); - de1->rec_len = cpu_to_le16(rec_len - name_len); - de->rec_len = cpu_to_le16(name_len); - de = de1; - } - de->name_len = namelen; - memcpy(de->name, name, namelen); - de->inode_no = cpu_to_le64(inode->i_ino); - exofs_set_de_type(de, inode); - err = exofs_commit_chunk(page, pos, rec_len); - dir->i_mtime = dir->i_ctime = current_time(dir); - mark_inode_dirty(dir); - sbi->s_numfiles++; - -out_put: - exofs_put_page(page); -out: - return err; -out_unlock: - unlock_page(page); - goto out_put; -} - -int exofs_delete_entry(struct exofs_dir_entry *dir, struct page *page) -{ - struct address_space *mapping = page->mapping; - struct inode *inode = mapping->host; - struct exofs_sb_info *sbi = inode->i_sb->s_fs_info; - char *kaddr = page_address(page); - unsigned from = ((char *)dir - kaddr) & ~(exofs_chunk_size(inode)-1); - unsigned to = ((char *)dir - kaddr) + le16_to_cpu(dir->rec_len); - loff_t pos; - struct exofs_dir_entry *pde = NULL; - struct exofs_dir_entry *de = (struct exofs_dir_entry *) (kaddr + from); - int err; - - while (de < dir) { - if (de->rec_len == 0) { - EXOFS_ERR("ERROR: exofs_delete_entry:" - "zero-length entry in directory(0x%lx)\n", - inode->i_ino); - err = -EIO; - goto out; - } - pde = de; - de = exofs_next_entry(de); - } - if (pde) - from = (char *)pde - (char *)page_address(page); - pos = page_offset(page) + from; - lock_page(page); - err = exofs_write_begin(NULL, page->mapping, pos, to - from, 0, - &page, NULL); - if (err) - EXOFS_ERR("exofs_delete_entry: exofs_write_begin FAILED => %d\n", - err); - if (pde) - pde->rec_len = cpu_to_le16(to - from); - dir->inode_no = 0; - if (likely(!err)) - err = exofs_commit_chunk(page, pos, to - from); - inode->i_ctime = inode->i_mtime = current_time(inode); - mark_inode_dirty(inode); - sbi->s_numfiles--; -out: - exofs_put_page(page); - return err; -} - -/* kept aligned on 4 bytes */ -#define THIS_DIR ".\0\0" -#define PARENT_DIR "..\0" - -int exofs_make_empty(struct inode *inode, struct inode *parent) -{ - struct address_space *mapping = inode->i_mapping; - struct page *page = grab_cache_page(mapping, 0); - unsigned chunk_size = exofs_chunk_size(inode); - struct exofs_dir_entry *de; - int err; - void *kaddr; - - if (!page) - return -ENOMEM; - - err = exofs_write_begin(NULL, page->mapping, 0, chunk_size, 0, - &page, NULL); - if (err) { - unlock_page(page); - goto fail; - } - - kaddr = kmap_atomic(page); - de = (struct exofs_dir_entry *)kaddr; - de->name_len = 1; - de->rec_len = cpu_to_le16(EXOFS_DIR_REC_LEN(1)); - memcpy(de->name, THIS_DIR, sizeof(THIS_DIR)); - de->inode_no = cpu_to_le64(inode->i_ino); - exofs_set_de_type(de, inode); - - de = (struct exofs_dir_entry *)(kaddr + EXOFS_DIR_REC_LEN(1)); - de->name_len = 2; - de->rec_len = cpu_to_le16(chunk_size - EXOFS_DIR_REC_LEN(1)); - de->inode_no = cpu_to_le64(parent->i_ino); - memcpy(de->name, PARENT_DIR, sizeof(PARENT_DIR)); - exofs_set_de_type(de, inode); - kunmap_atomic(kaddr); - err = exofs_commit_chunk(page, 0, chunk_size); -fail: - put_page(page); - return err; -} - -int exofs_empty_dir(struct inode *inode) -{ - struct page *page = NULL; - unsigned long i, npages = dir_pages(inode); - - for (i = 0; i < npages; i++) { - char *kaddr; - struct exofs_dir_entry *de; - page = exofs_get_page(inode, i); - - if (IS_ERR(page)) - continue; - - kaddr = page_address(page); - de = (struct exofs_dir_entry *)kaddr; - kaddr += exofs_last_byte(inode, i) - EXOFS_DIR_REC_LEN(1); - - while ((char *)de <= kaddr) { - if (de->rec_len == 0) { - EXOFS_ERR("ERROR: exofs_empty_dir: " - "zero-length directory entry" - "kaddr=%p, de=%p\n", kaddr, de); - goto not_empty; - } - if (de->inode_no != 0) { - /* check for . and .. */ - if (de->name[0] != '.') - goto not_empty; - if (de->name_len > 2) - goto not_empty; - if (de->name_len < 2) { - if (le64_to_cpu(de->inode_no) != - inode->i_ino) - goto not_empty; - } else if (de->name[1] != '.') - goto not_empty; - } - de = exofs_next_entry(de); - } - exofs_put_page(page); - } - return 1; - -not_empty: - exofs_put_page(page); - return 0; -} - -const struct file_operations exofs_dir_operations = { - .llseek = generic_file_llseek, - .read = generic_read_dir, - .iterate_shared = exofs_readdir, -}; diff --git a/fs/exofs/exofs.h b/fs/exofs/exofs.h deleted file mode 100644 index 5dc392404559..000000000000 --- a/fs/exofs/exofs.h +++ /dev/null @@ -1,240 +0,0 @@ -/* - * Copyright (C) 2005, 2006 - * Avishay Traeger (avishay@gmail.com) - * Copyright (C) 2008, 2009 - * Boaz Harrosh <ooo@electrozaur.com> - * - * Copyrights for code taken from ext2: - * Copyright (C) 1992, 1993, 1994, 1995 - * Remy Card (card@masi.ibp.fr) - * Laboratoire MASI - Institut Blaise Pascal - * Universite Pierre et Marie Curie (Paris VI) - * from - * linux/fs/minix/inode.c - * Copyright (C) 1991, 1992 Linus Torvalds - * - * This file is part of exofs. - * - * exofs is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation. Since it is based on ext2, and the only - * valid version of GPL for the Linux kernel is version 2, the only valid - * version of GPL for exofs is version 2. - * - * exofs is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with exofs; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ -#ifndef __EXOFS_H__ -#define __EXOFS_H__ - -#include <linux/fs.h> -#include <linux/time.h> -#include <linux/backing-dev.h> -#include <scsi/osd_ore.h> - -#include "common.h" - -#define EXOFS_ERR(fmt, a...) printk(KERN_ERR "exofs: " fmt, ##a) - -#ifdef CONFIG_EXOFS_DEBUG -#define EXOFS_DBGMSG(fmt, a...) \ - printk(KERN_NOTICE "exofs @%s:%d: " fmt, __func__, __LINE__, ##a) -#else -#define EXOFS_DBGMSG(fmt, a...) \ - do { if (0) printk(fmt, ##a); } while (0) -#endif - -/* u64 has problems with printk this will cast it to unsigned long long */ -#define _LLU(x) (unsigned long long)(x) - -struct exofs_dev { - struct ore_dev ored; - unsigned did; - unsigned urilen; - uint8_t *uri; - struct kobject ed_kobj; -}; -/* - * our extension to the in-memory superblock - */ -struct exofs_sb_info { - struct exofs_sb_stats s_ess; /* Written often, pre-allocate*/ - int s_timeout; /* timeout for OSD operations */ - uint64_t s_nextid; /* highest object ID used */ - uint32_t s_numfiles; /* number of files on fs */ - spinlock_t s_next_gen_lock; /* spinlock for gen # update */ - u32 s_next_generation; /* next gen # to use */ - atomic_t s_curr_pending; /* number of pending commands */ - - struct ore_layout layout; /* Default files layout */ - struct ore_comp one_comp; /* id & cred of partition id=0*/ - struct ore_components oc; /* comps for the partition */ - struct kobject s_kobj; /* holds per-sbi kobject */ -}; - -/* - * our extension to the in-memory inode - */ -struct exofs_i_info { - struct inode vfs_inode; /* normal in-memory inode */ - wait_queue_head_t i_wq; /* wait queue for inode */ - unsigned long i_flags; /* various atomic flags */ - uint32_t i_data[EXOFS_IDATA];/*short symlink names and device #s*/ - uint32_t i_dir_start_lookup; /* which page to start lookup */ - uint64_t i_commit_size; /* the object's written length */ - struct ore_comp one_comp; /* same component for all devices */ - struct ore_components oc; /* inode view of the device table */ -}; - -static inline osd_id exofs_oi_objno(struct exofs_i_info *oi) -{ - return oi->vfs_inode.i_ino + EXOFS_OBJ_OFF; -} - -/* - * our inode flags - */ -#define OBJ_2BCREATED 0 /* object will be created soon*/ -#define OBJ_CREATED 1 /* object has been created on the osd*/ - -static inline int obj_2bcreated(struct exofs_i_info *oi) -{ - return test_bit(OBJ_2BCREATED, &oi->i_flags); -} - -static inline void set_obj_2bcreated(struct exofs_i_info *oi) -{ - set_bit(OBJ_2BCREATED, &oi->i_flags); -} - -static inline int obj_created(struct exofs_i_info *oi) -{ - return test_bit(OBJ_CREATED, &oi->i_flags); -} - -static inline void set_obj_created(struct exofs_i_info *oi) -{ - set_bit(OBJ_CREATED, &oi->i_flags); -} - -int __exofs_wait_obj_created(struct exofs_i_info *oi); -static inline int wait_obj_created(struct exofs_i_info *oi) -{ - if (likely(obj_created(oi))) - return 0; - - return __exofs_wait_obj_created(oi); -} - -/* - * get to our inode from the vfs inode - */ -static inline struct exofs_i_info *exofs_i(struct inode *inode) -{ - return container_of(inode, struct exofs_i_info, vfs_inode); -} - -/* - * Maximum count of links to a file - */ -#define EXOFS_LINK_MAX 32000 - -/************************* - * function declarations * - *************************/ - -/* inode.c */ -unsigned exofs_max_io_pages(struct ore_layout *layout, - unsigned expected_pages); -int exofs_setattr(struct dentry *, struct iattr *); -int exofs_write_begin(struct file *file, struct address_space *mapping, - loff_t pos, unsigned len, unsigned flags, - struct page **pagep, void **fsdata); -extern struct inode *exofs_iget(struct super_block *, unsigned long); -struct inode *exofs_new_inode(struct inode *, umode_t); -extern int exofs_write_inode(struct inode *, struct writeback_control *wbc); -extern void exofs_evict_inode(struct inode *); - -/* dir.c: */ -int exofs_add_link(struct dentry *, struct inode *); -ino_t exofs_inode_by_name(struct inode *, struct dentry *); -int exofs_delete_entry(struct exofs_dir_entry *, struct page *); -int exofs_make_empty(struct inode *, struct inode *); -struct exofs_dir_entry *exofs_find_entry(struct inode *, struct dentry *, - struct page **); -int exofs_empty_dir(struct inode *); -struct exofs_dir_entry *exofs_dotdot(struct inode *, struct page **); -ino_t exofs_parent_ino(struct dentry *child); -int exofs_set_link(struct inode *, struct exofs_dir_entry *, struct page *, - struct inode *); - -/* super.c */ -void exofs_make_credential(u8 cred_a[OSD_CAP_LEN], - const struct osd_obj_id *obj); -int exofs_sbi_write_stats(struct exofs_sb_info *sbi); - -/* sys.c */ -int exofs_sysfs_init(void); -void exofs_sysfs_uninit(void); -int exofs_sysfs_sb_add(struct exofs_sb_info *sbi, - struct exofs_dt_device_info *dt_dev); -void exofs_sysfs_sb_del(struct exofs_sb_info *sbi); -int exofs_sysfs_odev_add(struct exofs_dev *edev, - struct exofs_sb_info *sbi); -void exofs_sysfs_dbg_print(void); - -/********************* - * operation vectors * - *********************/ -/* dir.c: */ -extern const struct file_operations exofs_dir_operations; - -/* file.c */ -extern const struct inode_operations exofs_file_inode_operations; -extern const struct file_operations exofs_file_operations; - -/* inode.c */ -extern const struct address_space_operations exofs_aops; - -/* namei.c */ -extern const struct inode_operations exofs_dir_inode_operations; -extern const struct inode_operations exofs_special_inode_operations; - -/* exofs_init_comps will initialize an ore_components device array - * pointing to a single ore_comp struct, and a round-robin view - * of the device table. - * The first device of each inode is the [inode->ino % num_devices] - * and the rest of the devices sequentially following where the - * first device is after the last device. - * It is assumed that the global device array at @sbi is twice - * bigger and that the device table repeats twice. - * See: exofs_read_lookup_dev_table() - */ -static inline void exofs_init_comps(struct ore_components *oc, - struct ore_comp *one_comp, - struct exofs_sb_info *sbi, osd_id oid) -{ - unsigned dev_mod = (unsigned)oid, first_dev; - - one_comp->obj.partition = sbi->one_comp.obj.partition; - one_comp->obj.id = oid; - exofs_make_credential(one_comp->cred, &one_comp->obj); - - oc->first_dev = 0; - oc->numdevs = sbi->layout.group_width * sbi->layout.mirrors_p1 * - sbi->layout.group_count; - oc->single_comp = EC_SINGLE_COMP; - oc->comps = one_comp; - - /* Round robin device view of the table */ - first_dev = (dev_mod * sbi->layout.mirrors_p1) % sbi->oc.numdevs; - oc->ods = &sbi->oc.ods[first_dev]; -} - -#endif diff --git a/fs/exofs/file.c b/fs/exofs/file.c deleted file mode 100644 index a94594ea2aa3..000000000000 --- a/fs/exofs/file.c +++ /dev/null @@ -1,83 +0,0 @@ -/* - * Copyright (C) 2005, 2006 - * Avishay Traeger (avishay@gmail.com) - * Copyright (C) 2008, 2009 - * Boaz Harrosh <ooo@electrozaur.com> - * - * Copyrights for code taken from ext2: - * Copyright (C) 1992, 1993, 1994, 1995 - * Remy Card (card@masi.ibp.fr) - * Laboratoire MASI - Institut Blaise Pascal - * Universite Pierre et Marie Curie (Paris VI) - * from - * linux/fs/minix/inode.c - * Copyright (C) 1991, 1992 Linus Torvalds - * - * This file is part of exofs. - * - * exofs is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation. Since it is based on ext2, and the only - * valid version of GPL for the Linux kernel is version 2, the only valid - * version of GPL for exofs is version 2. - * - * exofs is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with exofs; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ -#include "exofs.h" - -static int exofs_release_file(struct inode *inode, struct file *filp) -{ - return 0; -} - -/* exofs_file_fsync - flush the inode to disk - * - * Note, in exofs all metadata is written as part of inode, regardless. - * The writeout is synchronous - */ -static int exofs_file_fsync(struct file *filp, loff_t start, loff_t end, - int datasync) -{ - struct inode *inode = filp->f_mapping->host; - int ret; - - ret = file_write_and_wait_range(filp, start, end); - if (ret) - return ret; - - inode_lock(inode); - ret = sync_inode_metadata(filp->f_mapping->host, 1); - inode_unlock(inode); - return ret; -} - -static int exofs_flush(struct file *file, fl_owner_t id) -{ - int ret = vfs_fsync(file, 0); - /* TODO: Flush the OSD target */ - return ret; -} - -const struct file_operations exofs_file_operations = { - .llseek = generic_file_llseek, - .read_iter = generic_file_read_iter, - .write_iter = generic_file_write_iter, - .mmap = generic_file_mmap, - .open = generic_file_open, - .release = exofs_release_file, - .fsync = exofs_file_fsync, - .flush = exofs_flush, - .splice_read = generic_file_splice_read, - .splice_write = iter_file_splice_write, -}; - -const struct inode_operations exofs_file_inode_operations = { - .setattr = exofs_setattr, -}; diff --git a/fs/exofs/inode.c b/fs/exofs/inode.c deleted file mode 100644 index 5f81fcd383a4..000000000000 --- a/fs/exofs/inode.c +++ /dev/null @@ -1,1514 +0,0 @@ -/* - * Copyright (C) 2005, 2006 - * Avishay Traeger (avishay@gmail.com) - * Copyright (C) 2008, 2009 - * Boaz Harrosh <ooo@electrozaur.com> - * - * Copyrights for code taken from ext2: - * Copyright (C) 1992, 1993, 1994, 1995 - * Remy Card (card@masi.ibp.fr) - * Laboratoire MASI - Institut Blaise Pascal - * Universite Pierre et Marie Curie (Paris VI) - * from - * linux/fs/minix/inode.c - * Copyright (C) 1991, 1992 Linus Torvalds - * - * This file is part of exofs. - * - * exofs is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation. Since it is based on ext2, and the only - * valid version of GPL for the Linux kernel is version 2, the only valid - * version of GPL for exofs is version 2. - * - * exofs is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with exofs; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include <linux/slab.h> - -#include "exofs.h" - -#define EXOFS_DBGMSG2(M...) do {} while (0) - -unsigned exofs_max_io_pages(struct ore_layout *layout, - unsigned expected_pages) -{ - unsigned pages = min_t(unsigned, expected_pages, - layout->max_io_length / PAGE_SIZE); - - return pages; -} - -struct page_collect { - struct exofs_sb_info *sbi; - struct inode *inode; - unsigned expected_pages; - struct ore_io_state *ios; - - struct page **pages; - unsigned alloc_pages; - unsigned nr_pages; - unsigned long length; - loff_t pg_first; /* keep 64bit also in 32-arches */ - bool read_4_write; /* This means two things: that the read is sync - * And the pages should not be unlocked. - */ - struct page *that_locked_page; -}; - -static void _pcol_init(struct page_collect *pcol, unsigned expected_pages, - struct inode *inode) -{ - struct exofs_sb_info *sbi = inode->i_sb->s_fs_info; - - pcol->sbi = sbi; - pcol->inode = inode; - pcol->expected_pages = expected_pages; - - pcol->ios = NULL; - pcol->pages = NULL; - pcol->alloc_pages = 0; - pcol->nr_pages = 0; - pcol->length = 0; - pcol->pg_first = -1; - pcol->read_4_write = false; - pcol->that_locked_page = NULL; -} - -static void _pcol_reset(struct page_collect *pcol) -{ - pcol->expected_pages -= min(pcol->nr_pages, pcol->expected_pages); - - pcol->pages = NULL; - pcol->alloc_pages = 0; - pcol->nr_pages = 0; - pcol->length = 0; - pcol->pg_first = -1; - pcol->ios = NULL; - pcol->that_locked_page = NULL; - - /* this is probably the end of the loop but in writes - * it might not end here. don't be left with nothing - */ - if (!pcol->expected_pages) - pcol->expected_pages = - exofs_max_io_pages(&pcol->sbi->layout, ~0); -} - -static int pcol_try_alloc(struct page_collect *pcol) -{ - unsigned pages; - - /* TODO: easily support bio chaining */ - pages = exofs_max_io_pages(&pcol->sbi->layout, pcol->expected_pages); - - for (; pages; pages >>= 1) { - pcol->pages = kmalloc_array(pages, sizeof(struct page *), - GFP_KERNEL); - if (likely(pcol->pages)) { - pcol->alloc_pages = pages; - return 0; - } - } - - EXOFS_ERR("Failed to kmalloc expected_pages=%u\n", - pcol->expected_pages); - return -ENOMEM; -} - -static void pcol_free(struct page_collect *pcol) -{ - kfree(pcol->pages); - pcol->pages = NULL; - - if (pcol->ios) { - ore_put_io_state(pcol->ios); - pcol->ios = NULL; - } -} - -static int pcol_add_page(struct page_collect *pcol, struct page *page, - unsigned len) -{ - if (unlikely(pcol->nr_pages >= pcol->alloc_pages)) - return -ENOMEM; - - pcol->pages[pcol->nr_pages++] = page; - pcol->length += len; - return 0; -} - -enum {PAGE_WAS_NOT_IN_IO = 17}; -static int update_read_page(struct page *page, int ret) -{ - switch (ret) { - case 0: - /* Everything is OK */ - SetPageUptodate(page); - if (PageError(page)) - ClearPageError(page); - break; - case -EFAULT: - /* In this case we were trying to read something that wasn't on - * disk yet - return a page full of zeroes. This should be OK, - * because the object should be empty (if there was a write - * before this read, the read would be waiting with the page - * locked */ - clear_highpage(page); - - SetPageUptodate(page); - if (PageError(page)) - ClearPageError(page); - EXOFS_DBGMSG("recovered read error\n"); - /* fall through */ - case PAGE_WAS_NOT_IN_IO: - ret = 0; /* recovered error */ - break; - default: - SetPageError(page); - } - return ret; -} - -static void update_write_page(struct page *page, int ret) -{ - if (unlikely(ret == PAGE_WAS_NOT_IN_IO)) - return; /* don't pass start don't collect $200 */ - - if (ret) { - mapping_set_error(page->mapping, ret); - SetPageError(page); - } - end_page_writeback(page); -} - -/* Called at the end of reads, to optionally unlock pages and update their - * status. - */ -static int __readpages_done(struct page_collect *pcol) -{ - int i; - u64 good_bytes; - u64 length = 0; - int ret = ore_check_io(pcol->ios, NULL); - - if (likely(!ret)) { - good_bytes = pcol->length; - ret = PAGE_WAS_NOT_IN_IO; - } else { - good_bytes = 0; - } - - EXOFS_DBGMSG2("readpages_done(0x%lx) good_bytes=0x%llx" - " length=0x%lx nr_pages=%u\n", - pcol->inode->i_ino, _LLU(good_bytes), pcol->length, - pcol->nr_pages); - - for (i = 0; i < pcol->nr_pages; i++) { - struct page *page = pcol->pages[i]; - struct inode *inode = page->mapping->host; - int page_stat; - - if (inode != pcol->inode) - continue; /* osd might add more pages at end */ - - if (likely(length < good_bytes)) - page_stat = 0; - else - page_stat = ret; - - EXOFS_DBGMSG2(" readpages_done(0x%lx, 0x%lx) %s\n", - inode->i_ino, page->index, - page_stat ? "bad_bytes" : "good_bytes"); - - ret = update_read_page(page, page_stat); - if (!pcol->read_4_write) - unlock_page(page); - length += PAGE_SIZE; - } - - pcol_free(pcol); - EXOFS_DBGMSG2("readpages_done END\n"); - return ret; -} - -/* callback of async reads */ -static void readpages_done(struct ore_io_state *ios, void *p) -{ - struct page_collect *pcol = p; - - __readpages_done(pcol); - atomic_dec(&pcol->sbi->s_curr_pending); - kfree(pcol); -} - -static void _unlock_pcol_pages(struct page_collect *pcol, int ret, int rw) -{ - int i; - - for (i = 0; i < pcol->nr_pages; i++) { - struct page *page = pcol->pages[i]; - - if (rw == READ) - update_read_page(page, ret); - else - update_write_page(page, ret); - - unlock_page(page); - } -} - -static int _maybe_not_all_in_one_io(struct ore_io_state *ios, - struct page_collect *pcol_src, struct page_collect *pcol) -{ - /* length was wrong or offset was not page aligned */ - BUG_ON(pcol_src->nr_pages < ios->nr_pages); - - if (pcol_src->nr_pages > ios->nr_pages) { - struct page **src_page; - unsigned pages_less = pcol_src->nr_pages - ios->nr_pages; - unsigned long len_less = pcol_src->length - ios->length; - unsigned i; - int ret; - - /* This IO was trimmed */ - pcol_src->nr_pages = ios->nr_pages; - pcol_src->length = ios->length; - - /* Left over pages are passed to the next io */ - pcol->expected_pages += pages_less; - pcol->nr_pages = pages_less; - pcol->length = len_less; - src_page = pcol_src->pages + pcol_src->nr_pages; - pcol->pg_first = (*src_page)->index; - - ret = pcol_try_alloc(pcol); - if (unlikely(ret)) - return ret; - - for (i = 0; i < pages_less; ++i) - pcol->pages[i] = *src_page++; - - EXOFS_DBGMSG("Length was adjusted nr_pages=0x%x " - "pages_less=0x%x expected_pages=0x%x " - "next_offset=0x%llx next_len=0x%lx\n", - pcol_src->nr_pages, pages_less, pcol->expected_pages, - pcol->pg_first * PAGE_SIZE, pcol->length); - } - return 0; -} - -static int read_exec(struct page_collect *pcol) -{ - struct exofs_i_info *oi = exofs_i(pcol->inode); - struct ore_io_state *ios; - struct page_collect *pcol_copy = NULL; - int ret; - - if (!pcol->pages) - return 0; - - if (!pcol->ios) { - int ret = ore_get_rw_state(&pcol->sbi->layout, &oi->oc, true, - pcol->pg_first << PAGE_SHIFT, - pcol->length, &pcol->ios); - - if (ret) - return ret; - } - - ios = pcol->ios; - ios->pages = pcol->pages; - - if (pcol->read_4_write) { - ore_read(pcol->ios); - return __readpages_done(pcol); - } - - pcol_copy = kmalloc(sizeof(*pcol_copy), GFP_KERNEL); - if (!pcol_copy) { - ret = -ENOMEM; - goto err; - } - - *pcol_copy = *pcol; - ios->done = readpages_done; - ios->private = pcol_copy; - - /* pages ownership was passed to pcol_copy */ - _pcol_reset(pcol); - - ret = _maybe_not_all_in_one_io(ios, pcol_copy, pcol); - if (unlikely(ret)) - goto err; - - EXOFS_DBGMSG2("read_exec(0x%lx) offset=0x%llx length=0x%llx\n", - pcol->inode->i_ino, _LLU(ios->offset), _LLU(ios->length)); - - ret = ore_read(ios); - if (unlikely(ret)) - goto err; - - atomic_inc(&pcol->sbi->s_curr_pending); - - return 0; - -err: - if (!pcol_copy) /* Failed before ownership transfer */ - pcol_copy = pcol; - _unlock_pcol_pages(pcol_copy, ret, READ); - pcol_free(pcol_copy); - kfree(pcol_copy); - - return ret; -} - -/* readpage_strip is called either directly from readpage() or by the VFS from - * within read_cache_pages(), to add one more page to be read. It will try to - * collect as many contiguous pages as posible. If a discontinuity is - * encountered, or it runs out of resources, it will submit the previous segment - * and will start a new collection. Eventually caller must submit the last - * segment if present. - */ -static int readpage_strip(void *data, struct page *page) -{ - struct page_collect *pcol = data; - struct inode *inode = pcol->inode; - struct exofs_i_info *oi = exofs_i(inode); - loff_t i_size = i_size_read(inode); - pgoff_t end_index = i_size >> PAGE_SHIFT; - size_t len; - int ret; - - BUG_ON(!PageLocked(page)); - - /* FIXME: Just for debugging, will be removed */ - if (PageUptodate(page)) - EXOFS_ERR("PageUptodate(0x%lx, 0x%lx)\n", pcol->inode->i_ino, - page->index); - - pcol->that_locked_page = page; - - if (page->index < end_index) - len = PAGE_SIZE; - else if (page->index == end_index) - len = i_size & ~PAGE_MASK; - else - len = 0; - - if (!len || !obj_created(oi)) { - /* this will be out of bounds, or doesn't exist yet. - * Current page is cleared and the request is split - */ - clear_highpage(page); - - SetPageUptodate(page); - if (PageError(page)) - ClearPageError(page); - - if (!pcol->read_4_write) - unlock_page(page); - EXOFS_DBGMSG("readpage_strip(0x%lx) empty page len=%zx " - "read_4_write=%d index=0x%lx end_index=0x%lx " - "splitting\n", inode->i_ino, len, - pcol->read_4_write, page->index, end_index); - - return read_exec(pcol); - } - -try_again: - - if (unlikely(pcol->pg_first == -1)) { - pcol->pg_first = page->index; - } else if (unlikely((pcol->pg_first + pcol->nr_pages) != - page->index)) { - /* Discontinuity detected, split the request */ - ret = read_exec(pcol); - if (unlikely(ret)) - goto fail; - goto try_again; - } - - if (!pcol->pages) { - ret = pcol_try_alloc(pcol); - if (unlikely(ret)) - goto fail; - } - - if (len != PAGE_SIZE) - zero_user(page, len, PAGE_SIZE - len); - - EXOFS_DBGMSG2(" readpage_strip(0x%lx, 0x%lx) len=0x%zx\n", - inode->i_ino, page->index, len); - - ret = pcol_add_page(pcol, page, len); - if (ret) { - EXOFS_DBGMSG2("Failed pcol_add_page pages[i]=%p " - "this_len=0x%zx nr_pages=%u length=0x%lx\n", - page, len, pcol->nr_pages, pcol->length); - - /* split the request, and start again with current page */ - ret = read_exec(pcol); - if (unlikely(ret)) - goto fail; - - goto try_again; - } - - return 0; - -fail: - /* SetPageError(page); ??? */ - unlock_page(page); - return ret; -} - -static int exofs_readpages(struct file *file, struct address_space *mapping, - struct list_head *pages, unsigned nr_pages) -{ - struct page_collect pcol; - int ret; - - _pcol_init(&pcol, nr_pages, mapping->host); - - ret = read_cache_pages(mapping, pages, readpage_strip, &pcol); - if (ret) { - EXOFS_ERR("read_cache_pages => %d\n", ret); - return ret; - } - - ret = read_exec(&pcol); - if (unlikely(ret)) - return ret; - - return read_exec(&pcol); -} - -static int _readpage(struct page *page, bool read_4_write) -{ - struct page_collect pcol; - int ret; - - _pcol_init(&pcol, 1, page->mapping->host); - - pcol.read_4_write = read_4_write; - ret = readpage_strip(&pcol, page); - if (ret) { - EXOFS_ERR("_readpage => %d\n", ret); - return ret; - } - - return read_exec(&pcol); -} - -/* - * We don't need the file - */ -static int exofs_readpage(struct file *file, struct page *page) -{ - return _readpage(page, false); -} - -/* Callback for osd_write. All writes are asynchronous */ -static void writepages_done(struct ore_io_state *ios, void *p) -{ - struct page_collect *pcol = p; - int i; - u64 good_bytes; - u64 length = 0; - int ret = ore_check_io(ios, NULL); - - atomic_dec(&pcol->sbi->s_curr_pending); - - if (likely(!ret)) { - good_bytes = pcol->length; - ret = PAGE_WAS_NOT_IN_IO; - } else { - good_bytes = 0; - } - - EXOFS_DBGMSG2("writepages_done(0x%lx) good_bytes=0x%llx" - " length=0x%lx nr_pages=%u\n", - pcol->inode->i_ino, _LLU(good_bytes), pcol->length, - pcol->nr_pages); - - for (i = 0; i < pcol->nr_pages; i++) { - struct page *page = pcol->pages[i]; - struct inode *inode = page->mapping->host; - int page_stat; - - if (inode != pcol->inode) - continue; /* osd might add more pages to a bio */ - - if (likely(length < good_bytes)) - page_stat = 0; - else - page_stat = ret; - - update_write_page(page, page_stat); - unlock_page(page); - EXOFS_DBGMSG2(" writepages_done(0x%lx, 0x%lx) status=%d\n", - inode->i_ino, page->index, page_stat); - - length += PAGE_SIZE; - } - - pcol_free(pcol); - kfree(pcol); - EXOFS_DBGMSG2("writepages_done END\n"); -} - -static struct page *__r4w_get_page(void *priv, u64 offset, bool *uptodate) -{ - struct page_collect *pcol = priv; - pgoff_t index = offset / PAGE_SIZE; - - if (!pcol->that_locked_page || - (pcol->that_locked_page->index != index)) { - struct page *page; - loff_t i_size = i_size_read(pcol->inode); - - if (offset >= i_size) { - *uptodate = true; - EXOFS_DBGMSG2("offset >= i_size index=0x%lx\n", index); - return ZERO_PAGE(0); - } - - page = find_get_page(pcol->inode->i_mapping, index); - if (!page) { - page = find_or_create_page(pcol->inode->i_mapping, - index, GFP_NOFS); - if (unlikely(!page)) { - EXOFS_DBGMSG("grab_cache_page Failed " - "index=0x%llx\n", _LLU(index)); - return NULL; - } - unlock_page(page); - } - *uptodate = PageUptodate(page); - EXOFS_DBGMSG2("index=0x%lx uptodate=%d\n", index, *uptodate); - return page; - } else { - EXOFS_DBGMSG2("YES that_locked_page index=0x%lx\n", - pcol->that_locked_page->index); - *uptodate = true; - return pcol->that_locked_page; - } -} - -static void __r4w_put_page(void *priv, struct page *page) -{ - struct page_collect *pcol = priv; - - if ((pcol->that_locked_page != page) && (ZERO_PAGE(0) != page)) { - EXOFS_DBGMSG2("index=0x%lx\n", page->index); - put_page(page); - return; - } - EXOFS_DBGMSG2("that_locked_page index=0x%lx\n", - ZERO_PAGE(0) == page ? -1 : page->index); -} - -static const struct _ore_r4w_op _r4w_op = { - .get_page = &__r4w_get_page, - .put_page = &__r4w_put_page, -}; - -static int write_exec(struct page_collect *pcol) -{ - struct exofs_i_info *oi = exofs_i(pcol->inode); - struct ore_io_state *ios; - struct page_collect *pcol_copy = NULL; - int ret; - - if (!pcol->pages) - return 0; - - BUG_ON(pcol->ios); - ret = ore_get_rw_state(&pcol->sbi->layout, &oi->oc, false, - pcol->pg_first << PAGE_SHIFT, - pcol->length, &pcol->ios); - if (unlikely(ret)) - goto err; - - pcol_copy = kmalloc(sizeof(*pcol_copy), GFP_KERNEL); - if (!pcol_copy) { - EXOFS_ERR("write_exec: Failed to kmalloc(pcol)\n"); - ret = -ENOMEM; - goto err; - } - - *pcol_copy = *pcol; - - ios = pcol->ios; - ios->pages = pcol_copy->pages; - ios->done = writepages_done; - ios->r4w = &_r4w_op; - ios->private = pcol_copy; - - /* pages ownership was passed to pcol_copy */ - _pcol_reset(pcol); - - ret = _maybe_not_all_in_one_io(ios, pcol_copy, pcol); - if (unlikely(ret)) - goto err; - - EXOFS_DBGMSG2("write_exec(0x%lx) offset=0x%llx length=0x%llx\n", - pcol->inode->i_ino, _LLU(ios->offset), _LLU(ios->length)); - - ret = ore_write(ios); - if (unlikely(ret)) { - EXOFS_ERR("write_exec: ore_write() Failed\n"); - goto err; - } - - atomic_inc(&pcol->sbi->s_curr_pending); - return 0; - -err: - if (!pcol_copy) /* Failed before ownership transfer */ - pcol_copy = pcol; - _unlock_pcol_pages(pcol_copy, ret, WRITE); - pcol_free(pcol_copy); - kfree(pcol_copy); - - return ret; -} - -/* writepage_strip is called either directly from writepage() or by the VFS from - * within write_cache_pages(), to add one more page to be written to storage. - * It will try to collect as many contiguous pages as possible. If a - * discontinuity is encountered or it runs out of resources it will submit the - * previous segment and will start a new collection. - * Eventually caller must submit the last segment if present. - */ -static int writepage_strip(struct page *page, - struct writeback_control *wbc_unused, void *data) -{ - struct page_collect *pcol = data; - struct inode *inode = pcol->inode; - struct exofs_i_info *oi = exofs_i(inode); - loff_t i_size = i_size_read(inode); - pgoff_t end_index = i_size >> PAGE_SHIFT; - size_t len; - int ret; - - BUG_ON(!PageLocked(page)); - - ret = wait_obj_created(oi); - if (unlikely(ret)) - goto fail; - - if (page->index < end_index) - /* in this case, the page is within the limits of the file */ - len = PAGE_SIZE; - else { - len = i_size & ~PAGE_MASK; - - if (page->index > end_index || !len) { - /* in this case, the page is outside the limits - * (truncate in progress) - */ - ret = write_exec(pcol); - if (unlikely(ret)) - goto fail; - if (PageError(page)) - ClearPageError(page); - unlock_page(page); - EXOFS_DBGMSG("writepage_strip(0x%lx, 0x%lx) " - "outside the limits\n", - inode->i_ino, page->index); - return 0; - } - } - -try_again: - - if (unlikely(pcol->pg_first == -1)) { - pcol->pg_first = page->index; - } else if (unlikely((pcol->pg_first + pcol->nr_pages) != - page->index)) { - /* Discontinuity detected, split the request */ - ret = write_exec(pcol); - if (unlikely(ret)) - goto fail; - - EXOFS_DBGMSG("writepage_strip(0x%lx, 0x%lx) Discontinuity\n", - inode->i_ino, page->index); - goto try_again; - } - - if (!pcol->pages) { - ret = pcol_try_alloc(pcol); - if (unlikely(ret)) - goto fail; - } - - EXOFS_DBGMSG2(" writepage_strip(0x%lx, 0x%lx) len=0x%zx\n", - inode->i_ino, page->index, len); - - ret = pcol_add_page(pcol, page, len); - if (unlikely(ret)) { - EXOFS_DBGMSG2("Failed pcol_add_page " - "nr_pages=%u total_length=0x%lx\n", - pcol->nr_pages, pcol->length); - - /* split the request, next loop will start again */ - ret = write_exec(pcol); - if (unlikely(ret)) { - EXOFS_DBGMSG("write_exec failed => %d", ret); - goto fail; - } - - goto try_again; - } - - BUG_ON(PageWriteback(page)); - set_page_writeback(page); - - return 0; - -fail: - EXOFS_DBGMSG("Error: writepage_strip(0x%lx, 0x%lx)=>%d\n", - inode->i_ino, page->index, ret); - mapping_set_error(page->mapping, -EIO); - unlock_page(page); - return ret; -} - -static int exofs_writepages(struct address_space *mapping, - struct writeback_control *wbc) -{ - struct page_collect pcol; - long start, end, expected_pages; - int ret; - - start = wbc->range_start >> PAGE_SHIFT; - end = (wbc->range_end == LLONG_MAX) ? - start + mapping->nrpages : - wbc->range_end >> PAGE_SHIFT; - - if (start || end) - expected_pages = end - start + 1; - else - expected_pages = mapping->nrpages; - - if (expected_pages < 32L) - expected_pages = 32L; - - EXOFS_DBGMSG2("inode(0x%lx) wbc->start=0x%llx wbc->end=0x%llx " - "nrpages=%lu start=0x%lx end=0x%lx expected_pages=%ld\n", - mapping->host->i_ino, wbc->range_start, wbc->range_end, - mapping->nrpages, start, end, expected_pages); - - _pcol_init(&pcol, expected_pages, mapping->host); - - ret = write_cache_pages(mapping, wbc, writepage_strip, &pcol); - if (unlikely(ret)) { - EXOFS_ERR("write_cache_pages => %d\n", ret); - return ret; - } - - ret = write_exec(&pcol); - if (unlikely(ret)) - return ret; - - if (wbc->sync_mode == WB_SYNC_ALL) { - return write_exec(&pcol); /* pump the last reminder */ - } else if (pcol.nr_pages) { - /* not SYNC let the reminder join the next writeout */ - unsigned i; - - for (i = 0; i < pcol.nr_pages; i++) { - struct page *page = pcol.pages[i]; - - end_page_writeback(page); - set_page_dirty(page); - unlock_page(page); - } - } - return 0; -} - -/* -static int exofs_writepage(struct page *page, struct writeback_control *wbc) -{ - struct page_collect pcol; - int ret; - - _pcol_init(&pcol, 1, page->mapping->host); - - ret = writepage_strip(page, NULL, &pcol); - if (ret) { - EXOFS_ERR("exofs_writepage => %d\n", ret); - return ret; - } - - return write_exec(&pcol); -} -*/ -/* i_mutex held using inode->i_size directly */ -static void _write_failed(struct inode *inode, loff_t to) -{ - if (to > inode->i_size) - truncate_pagecache(inode, inode->i_size); -} - -int exofs_write_begin(struct file *file, struct address_space *mapping, - loff_t pos, unsigned len, unsigned flags, - struct page **pagep, void **fsdata) -{ - int ret = 0; - struct page *page; - - page = *pagep; - if (page == NULL) { - page = grab_cache_page_write_begin(mapping, pos >> PAGE_SHIFT, - flags); - if (!page) { - EXOFS_DBGMSG("grab_cache_page_write_begin failed\n"); - return -ENOMEM; - } - *pagep = page; - } - - /* read modify write */ - if (!PageUptodate(page) && (len != PAGE_SIZE)) { - loff_t i_size = i_size_read(mapping->host); - pgoff_t end_index = i_size >> PAGE_SHIFT; - - if (page->index > end_index) { - clear_highpage(page); - SetPageUptodate(page); - } else { - ret = _readpage(page, true); - if (ret) { - unlock_page(page); - EXOFS_DBGMSG("__readpage failed\n"); - } - } - } - return ret; -} - -static int exofs_write_begin_export(struct file *file, - struct address_space *mapping, - loff_t pos, unsigned len, unsigned flags, - struct page **pagep, void **fsdata) -{ - *pagep = NULL; - - return exofs_write_begin(file, mapping, pos, len, flags, pagep, - fsdata); -} - -static int exofs_write_end(struct file *file, struct address_space *mapping, - loff_t pos, unsigned len, unsigned copied, - struct page *page, void *fsdata) -{ - struct inode *inode = mapping->host; - loff_t last_pos = pos + copied; - - if (!PageUptodate(page)) { - if (copied < len) { - _write_failed(inode, pos + len); - copied = 0; - goto out; - } - SetPageUptodate(page); - } - if (last_pos > inode->i_size) { - i_size_write(inode, last_pos); - mark_inode_dirty(inode); - } - set_page_dirty(page); -out: - unlock_page(page); - put_page(page); - return copied; -} - -static int exofs_releasepage(struct page *page, gfp_t gfp) -{ - EXOFS_DBGMSG("page 0x%lx\n", page->index); - WARN_ON(1); - return 0; -} - -static void exofs_invalidatepage(struct page *page, unsigned int offset, - unsigned int length) -{ - EXOFS_DBGMSG("page 0x%lx offset 0x%x length 0x%x\n", - page->index, offset, length); - WARN_ON(1); -} - - - /* TODO: Should be easy enough to do proprly */ -static ssize_t exofs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) -{ - return 0; -} - -const struct address_space_operations exofs_aops = { - .readpage = exofs_readpage, - .readpages = exofs_readpages, - .writepage = NULL, - .writepages = exofs_writepages, - .write_begin = exofs_write_begin_export, - .write_end = exofs_write_end, - .releasepage = exofs_releasepage, - .set_page_dirty = __set_page_dirty_nobuffers, - .invalidatepage = exofs_invalidatepage, - - /* Not implemented Yet */ - .bmap = NULL, /* TODO: use osd's OSD_ACT_READ_MAP */ - .direct_IO = exofs_direct_IO, - - /* With these NULL has special meaning or default is not exported */ - .migratepage = NULL, - .launder_page = NULL, - .is_partially_uptodate = NULL, - .error_remove_page = NULL, -}; - -/****************************************************************************** - * INODE OPERATIONS - *****************************************************************************/ - -/* - * Test whether an inode is a fast symlink. - */ -static inline int exofs_inode_is_fast_symlink(struct inode *inode) -{ - struct exofs_i_info *oi = exofs_i(inode); - - return S_ISLNK(inode->i_mode) && (oi->i_data[0] != 0); -} - -static int _do_truncate(struct inode *inode, loff_t newsize) -{ - struct exofs_i_info *oi = exofs_i(inode); - struct exofs_sb_info *sbi = inode->i_sb->s_fs_info; - int ret; - - inode->i_mtime = inode->i_ctime = current_time(inode); - - ret = ore_truncate(&sbi->layout, &oi->oc, (u64)newsize); - if (likely(!ret)) - truncate_setsize(inode, newsize); - - EXOFS_DBGMSG2("(0x%lx) size=0x%llx ret=>%d\n", - inode->i_ino, newsize, ret); - return ret; -} - -/* - * Set inode attributes - update size attribute on OSD if needed, - * otherwise just call generic functions. - */ -int exofs_setattr(struct dentry *dentry, struct iattr *iattr) -{ - struct inode *inode = d_inode(dentry); - int error; - - /* if we are about to modify an object, and it hasn't been - * created yet, wait - */ - error = wait_obj_created(exofs_i(inode)); - if (unlikely(error)) - return error; - - error = setattr_prepare(dentry, iattr); - if (unlikely(error)) - return error; - - if ((iattr->ia_valid & ATTR_SIZE) && - iattr->ia_size != i_size_read(inode)) { - error = _do_truncate(inode, iattr->ia_size); - if (unlikely(error)) - return error; - } - - setattr_copy(inode, iattr); - mark_inode_dirty(inode); - return 0; -} - -static const struct osd_attr g_attr_inode_file_layout = ATTR_DEF( - EXOFS_APAGE_FS_DATA, - EXOFS_ATTR_INODE_FILE_LAYOUT, - 0); -static const struct osd_attr g_attr_inode_dir_layout = ATTR_DEF( - EXOFS_APAGE_FS_DATA, - EXOFS_ATTR_INODE_DIR_LAYOUT, - 0); - -/* - * Read the Linux inode info from the OSD, and return it as is. In exofs the - * inode info is in an application specific page/attribute of the osd-object. - */ -static int exofs_get_inode(struct super_block *sb, struct exofs_i_info *oi, - struct exofs_fcb *inode) -{ - struct exofs_sb_info *sbi = sb->s_fs_info; - struct osd_attr attrs[] = { - [0] = g_attr_inode_data, - [1] = g_attr_inode_file_layout, - [2] = g_attr_inode_dir_layout, - }; - struct ore_io_state *ios; - struct exofs_on_disk_inode_layout *layout; - int ret; - - ret = ore_get_io_state(&sbi->layout, &oi->oc, &ios); - if (unlikely(ret)) { - EXOFS_ERR("%s: ore_get_io_state failed.\n", __func__); - return ret; - } - - attrs[1].len = exofs_on_disk_inode_layout_size(sbi->oc.numdevs); - attrs[2].len = exofs_on_disk_inode_layout_size(sbi->oc.numdevs); - - ios->in_attr = attrs; - ios->in_attr_len = ARRAY_SIZE(attrs); - - ret = ore_read(ios); - if (unlikely(ret)) { - EXOFS_ERR("object(0x%llx) corrupted, return empty file=>%d\n", - _LLU(oi->one_comp.obj.id), ret); - memset(inode, 0, sizeof(*inode)); - inode->i_mode = 0040000 | (0777 & ~022); - /* If object is lost on target we might as well enable it's - * delete. - */ - ret = 0; - goto out; - } - - ret = extract_attr_from_ios(ios, &attrs[0]); - if (ret) { - EXOFS_ERR("%s: extract_attr 0 of inode failed\n", __func__); - goto out; - } - WARN_ON(attrs[0].len != EXOFS_INO_ATTR_SIZE); - memcpy(inode, attrs[0].val_ptr, EXOFS_INO_ATTR_SIZE); - - ret = extract_attr_from_ios(ios, &attrs[1]); - if (ret) { - EXOFS_ERR("%s: extract_attr 1 of inode failed\n", __func__); - goto out; - } - if (attrs[1].len) { - layout = attrs[1].val_ptr; - if (layout->gen_func != cpu_to_le16(LAYOUT_MOVING_WINDOW)) { - EXOFS_ERR("%s: unsupported files layout %d\n", - __func__, layout->gen_func); - ret = -ENOTSUPP; - goto out; - } - } - - ret = extract_attr_from_ios(ios, &attrs[2]); - if (ret) { - EXOFS_ERR("%s: extract_attr 2 of inode failed\n", __func__); - goto out; - } - if (attrs[2].len) { - layout = attrs[2].val_ptr; - if (layout->gen_func != cpu_to_le16(LAYOUT_MOVING_WINDOW)) { - EXOFS_ERR("%s: unsupported meta-data layout %d\n", - __func__, layout->gen_func); - ret = -ENOTSUPP; - goto out; - } - } - -out: - ore_put_io_state(ios); - return ret; -} - -static void __oi_init(struct exofs_i_info *oi) -{ - init_waitqueue_head(&oi->i_wq); - oi->i_flags = 0; -} -/* - * Fill in an inode read from the OSD and set it up for use - */ -struct inode *exofs_iget(struct super_block *sb, unsigned long ino) -{ - struct exofs_i_info *oi; - struct exofs_fcb fcb; - struct inode *inode; - int ret; - - inode = iget_locked(sb, ino); - if (!inode) - return ERR_PTR(-ENOMEM); - if (!(inode->i_state & I_NEW)) - return inode; - oi = exofs_i(inode); - __oi_init(oi); - exofs_init_comps(&oi->oc, &oi->one_comp, sb->s_fs_info, - exofs_oi_objno(oi)); - - /* read the inode from the osd */ - ret = exofs_get_inode(sb, oi, &fcb); - if (ret) - goto bad_inode; - - set_obj_created(oi); - - /* copy stuff from on-disk struct to in-memory struct */ - inode->i_mode = le16_to_cpu(fcb.i_mode); - i_uid_write(inode, le32_to_cpu(fcb.i_uid)); - i_gid_write(inode, le32_to_cpu(fcb.i_gid)); - set_nlink(inode, le16_to_cpu(fcb.i_links_count)); - inode->i_ctime.tv_sec = (signed)le32_to_cpu(fcb.i_ctime); - inode->i_atime.tv_sec = (signed)le32_to_cpu(fcb.i_atime); - inode->i_mtime.tv_sec = (signed)le32_to_cpu(fcb.i_mtime); - inode->i_ctime.tv_nsec = - inode->i_atime.tv_nsec = inode->i_mtime.tv_nsec = 0; - oi->i_commit_size = le64_to_cpu(fcb.i_size); - i_size_write(inode, oi->i_commit_size); - inode->i_blkbits = EXOFS_BLKSHIFT; - inode->i_generation = le32_to_cpu(fcb.i_generation); - - oi->i_dir_start_lookup = 0; - - if ((inode->i_nlink == 0) && (inode->i_mode == 0)) { - ret = -ESTALE; - goto bad_inode; - } - - if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { - if (fcb.i_data[0]) - inode->i_rdev = - old_decode_dev(le32_to_cpu(fcb.i_data[0])); - else - inode->i_rdev = - new_decode_dev(le32_to_cpu(fcb.i_data[1])); - } else { - memcpy(oi->i_data, fcb.i_data, sizeof(fcb.i_data)); - } - - if (S_ISREG(inode->i_mode)) { - inode->i_op = &exofs_file_inode_operations; - inode->i_fop = &exofs_file_operations; - inode->i_mapping->a_ops = &exofs_aops; - } else if (S_ISDIR(inode->i_mode)) { - inode->i_op = &exofs_dir_inode_operations; - inode->i_fop = &exofs_dir_operations; - inode->i_mapping->a_ops = &exofs_aops; - } else if (S_ISLNK(inode->i_mode)) { - if (exofs_inode_is_fast_symlink(inode)) { - inode->i_op = &simple_symlink_inode_operations; - inode->i_link = (char *)oi->i_data; - } else { - inode->i_op = &page_symlink_inode_operations; - inode_nohighmem(inode); - inode->i_mapping->a_ops = &exofs_aops; - } - } else { - inode->i_op = &exofs_special_inode_operations; - if (fcb.i_data[0]) - init_special_inode(inode, inode->i_mode, - old_decode_dev(le32_to_cpu(fcb.i_data[0]))); - else - init_special_inode(inode, inode->i_mode, - new_decode_dev(le32_to_cpu(fcb.i_data[1]))); - } - - unlock_new_inode(inode); - return inode; - -bad_inode: - iget_failed(inode); - return ERR_PTR(ret); -} - -int __exofs_wait_obj_created(struct exofs_i_info *oi) -{ - if (!obj_created(oi)) { - EXOFS_DBGMSG("!obj_created\n"); - BUG_ON(!obj_2bcreated(oi)); - wait_event(oi->i_wq, obj_created(oi)); - EXOFS_DBGMSG("wait_event done\n"); - } - return unlikely(is_bad_inode(&oi->vfs_inode)) ? -EIO : 0; -} - -/* - * Callback function from exofs_new_inode(). The important thing is that we - * set the obj_created flag so that other methods know that the object exists on - * the OSD. - */ -static void create_done(struct ore_io_state *ios, void *p) -{ - struct inode *inode = p; - struct exofs_i_info *oi = exofs_i(inode); - struct exofs_sb_info *sbi = inode->i_sb->s_fs_info; - int ret; - - ret = ore_check_io(ios, NULL); - ore_put_io_state(ios); - - atomic_dec(&sbi->s_curr_pending); - - if (unlikely(ret)) { - EXOFS_ERR("object=0x%llx creation failed in pid=0x%llx", - _LLU(exofs_oi_objno(oi)), - _LLU(oi->one_comp.obj.partition)); - /*TODO: When FS is corrupted creation can fail, object already - * exist. Get rid of this asynchronous creation, if exist - * increment the obj counter and try the next object. Until we - * succeed. All these dangling objects will be made into lost - * files by chkfs.exofs - */ - } - - set_obj_created(oi); - - wake_up(&oi->i_wq); -} - -/* - * Set up a new inode and create an object for it on the OSD - */ -struct inode *exofs_new_inode(struct inode *dir, umode_t mode) -{ - struct super_block *sb = dir->i_sb; - struct exofs_sb_info *sbi = sb->s_fs_info; - struct inode *inode; - struct exofs_i_info *oi; - struct ore_io_state *ios; - int ret; - - inode = new_inode(sb); - if (!inode) - return ERR_PTR(-ENOMEM); - - oi = exofs_i(inode); - __oi_init(oi); - - set_obj_2bcreated(oi); - - inode_init_owner(inode, dir, mode); - inode->i_ino = sbi->s_nextid++; - inode->i_blkbits = EXOFS_BLKSHIFT; - inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode); - oi->i_commit_size = inode->i_size = 0; - spin_lock(&sbi->s_next_gen_lock); - inode->i_generation = sbi->s_next_generation++; - spin_unlock(&sbi->s_next_gen_lock); - insert_inode_hash(inode); - - exofs_init_comps(&oi->oc, &oi->one_comp, sb->s_fs_info, - exofs_oi_objno(oi)); - exofs_sbi_write_stats(sbi); /* Make sure new sbi->s_nextid is on disk */ - - mark_inode_dirty(inode); - - ret = ore_get_io_state(&sbi->layout, &oi->oc, &ios); - if (unlikely(ret)) { - EXOFS_ERR("exofs_new_inode: ore_get_io_state failed\n"); - return ERR_PTR(ret); - } - - ios->done = create_done; - ios->private = inode; - - ret = ore_create(ios); - if (ret) { - ore_put_io_state(ios); - return ERR_PTR(ret); - } - atomic_inc(&sbi->s_curr_pending); - - return inode; -} - -/* - * struct to pass two arguments to update_inode's callback - */ -struct updatei_args { - struct exofs_sb_info *sbi; - struct exofs_fcb fcb; -}; - -/* - * Callback function from exofs_update_inode(). - */ -static void updatei_done(struct ore_io_state *ios, void *p) -{ - struct updatei_args *args = p; - - ore_put_io_state(ios); - - atomic_dec(&args->sbi->s_curr_pending); - - kfree(args); -} - -/* - * Write the inode to the OSD. Just fill up the struct, and set the attribute - * synchronously or asynchronously depending on the do_sync flag. - */ -static int exofs_update_inode(struct inode *inode, int do_sync) -{ - struct exofs_i_info *oi = exofs_i(inode); - struct super_block *sb = inode->i_sb; - struct exofs_sb_info *sbi = sb->s_fs_info; - struct ore_io_state *ios; - struct osd_attr attr; - struct exofs_fcb *fcb; - struct updatei_args *args; - int ret; - - args = kzalloc(sizeof(*args), GFP_KERNEL); - if (!args) { - EXOFS_DBGMSG("Failed kzalloc of args\n"); - return -ENOMEM; - } - - fcb = &args->fcb; - - fcb->i_mode = cpu_to_le16(inode->i_mode); - fcb->i_uid = cpu_to_le32(i_uid_read(inode)); - fcb->i_gid = cpu_to_le32(i_gid_read(inode)); - fcb->i_links_count = cpu_to_le16(inode->i_nlink); - fcb->i_ctime = cpu_to_le32(inode->i_ctime.tv_sec); - fcb->i_atime = cpu_to_le32(inode->i_atime.tv_sec); - fcb->i_mtime = cpu_to_le32(inode->i_mtime.tv_sec); - oi->i_commit_size = i_size_read(inode); - fcb->i_size = cpu_to_le64(oi->i_commit_size); - fcb->i_generation = cpu_to_le32(inode->i_generation); - - if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { - if (old_valid_dev(inode->i_rdev)) { - fcb->i_data[0] = - cpu_to_le32(old_encode_dev(inode->i_rdev)); - fcb->i_data[1] = 0; - } else { - fcb->i_data[0] = 0; - fcb->i_data[1] = - cpu_to_le32(new_encode_dev(inode->i_rdev)); - fcb->i_data[2] = 0; - } - } else - memcpy(fcb->i_data, oi->i_data, sizeof(fcb->i_data)); - - ret = ore_get_io_state(&sbi->layout, &oi->oc, &ios); - if (unlikely(ret)) { - EXOFS_ERR("%s: ore_get_io_state failed.\n", __func__); - goto free_args; - } - - attr = g_attr_inode_data; - attr.val_ptr = fcb; - ios->out_attr_len = 1; - ios->out_attr = &attr; - - wait_obj_created(oi); - - if (!do_sync) { - args->sbi = sbi; - ios->done = updatei_done; - ios->private = args; - } - - ret = ore_write(ios); - if (!do_sync && !ret) { - atomic_inc(&sbi->s_curr_pending); - goto out; /* deallocation in updatei_done */ - } - - ore_put_io_state(ios); -free_args: - kfree(args); -out: - EXOFS_DBGMSG("(0x%lx) do_sync=%d ret=>%d\n", - inode->i_ino, do_sync, ret); - return ret; -} - -int exofs_write_inode(struct inode *inode, struct writeback_control *wbc) -{ - /* FIXME: fix fsync and use wbc->sync_mode == WB_SYNC_ALL */ - return exofs_update_inode(inode, 1); -} - -/* - * Callback function from exofs_delete_inode() - don't have much cleaning up to - * do. - */ -static void delete_done(struct ore_io_state *ios, void *p) -{ - struct exofs_sb_info *sbi = p; - - ore_put_io_state(ios); - - atomic_dec(&sbi->s_curr_pending); -} - -/* - * Called when the refcount of an inode reaches zero. We remove the object - * from the OSD here. We make sure the object was created before we try and - * delete it. - */ -void exofs_evict_inode(struct inode *inode) -{ - struct exofs_i_info *oi = exofs_i(inode); - struct super_block *sb = inode->i_sb; - struct exofs_sb_info *sbi = sb->s_fs_info; - struct ore_io_state *ios; - int ret; - - truncate_inode_pages_final(&inode->i_data); - - /* TODO: should do better here */ - if (inode->i_nlink || is_bad_inode(inode)) - goto no_delete; - - inode->i_size = 0; - clear_inode(inode); - - /* if we are deleting an obj that hasn't been created yet, wait. - * This also makes sure that create_done cannot be called with an - * already evicted inode. - */ - wait_obj_created(oi); - /* ignore the error, attempt a remove anyway */ - - /* Now Remove the OSD objects */ - ret = ore_get_io_state(&sbi->layout, &oi->oc, &ios); - if (unlikely(ret)) { - EXOFS_ERR("%s: ore_get_io_state failed\n", __func__); - return; - } - - ios->done = delete_done; - ios->private = sbi; - - ret = ore_remove(ios); - if (ret) { - EXOFS_ERR("%s: ore_remove failed\n", __func__); - ore_put_io_state(ios); - return; - } - atomic_inc(&sbi->s_curr_pending); - - return; - -no_delete: - clear_inode(inode); -} diff --git a/fs/exofs/namei.c b/fs/exofs/namei.c deleted file mode 100644 index 7295cd722770..000000000000 --- a/fs/exofs/namei.c +++ /dev/null @@ -1,323 +0,0 @@ -/* - * Copyright (C) 2005, 2006 - * Avishay Traeger (avishay@gmail.com) - * Copyright (C) 2008, 2009 - * Boaz Harrosh <ooo@electrozaur.com> - * - * Copyrights for code taken from ext2: - * Copyright (C) 1992, 1993, 1994, 1995 - * Remy Card (card@masi.ibp.fr) - * Laboratoire MASI - Institut Blaise Pascal - * Universite Pierre et Marie Curie (Paris VI) - * from - * linux/fs/minix/inode.c - * Copyright (C) 1991, 1992 Linus Torvalds - * - * This file is part of exofs. - * - * exofs is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation. Since it is based on ext2, and the only - * valid version of GPL for the Linux kernel is version 2, the only valid - * version of GPL for exofs is version 2. - * - * exofs is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with exofs; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include "exofs.h" - -static inline int exofs_add_nondir(struct dentry *dentry, struct inode *inode) -{ - int err = exofs_add_link(dentry, inode); - if (!err) { - d_instantiate(dentry, inode); - return 0; - } - inode_dec_link_count(inode); - iput(inode); - return err; -} - -static struct dentry *exofs_lookup(struct inode *dir, struct dentry *dentry, - unsigned int flags) -{ - struct inode *inode; - ino_t ino; - - if (dentry->d_name.len > EXOFS_NAME_LEN) - return ERR_PTR(-ENAMETOOLONG); - - ino = exofs_inode_by_name(dir, dentry); - inode = ino ? exofs_iget(dir->i_sb, ino) : NULL; - return d_splice_alias(inode, dentry); -} - -static int exofs_create(struct inode *dir, struct dentry *dentry, umode_t mode, - bool excl) -{ - struct inode *inode = exofs_new_inode(dir, mode); - int err = PTR_ERR(inode); - if (!IS_ERR(inode)) { - inode->i_op = &exofs_file_inode_operations; - inode->i_fop = &exofs_file_operations; - inode->i_mapping->a_ops = &exofs_aops; - mark_inode_dirty(inode); - err = exofs_add_nondir(dentry, inode); - } - return err; -} - -static int exofs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, - dev_t rdev) -{ - struct inode *inode; - int err; - - inode = exofs_new_inode(dir, mode); - err = PTR_ERR(inode); - if (!IS_ERR(inode)) { - init_special_inode(inode, inode->i_mode, rdev); - mark_inode_dirty(inode); - err = exofs_add_nondir(dentry, inode); - } - return err; -} - -static int exofs_symlink(struct inode *dir, struct dentry *dentry, - const char *symname) -{ - struct super_block *sb = dir->i_sb; - int err = -ENAMETOOLONG; - unsigned l = strlen(symname)+1; - struct inode *inode; - struct exofs_i_info *oi; - - if (l > sb->s_blocksize) - goto out; - - inode = exofs_new_inode(dir, S_IFLNK | S_IRWXUGO); - err = PTR_ERR(inode); - if (IS_ERR(inode)) - goto out; - - oi = exofs_i(inode); - if (l > sizeof(oi->i_data)) { - /* slow symlink */ - inode->i_op = &page_symlink_inode_operations; - inode_nohighmem(inode); - inode->i_mapping->a_ops = &exofs_aops; - memset(oi->i_data, 0, sizeof(oi->i_data)); - - err = page_symlink(inode, symname, l); - if (err) - goto out_fail; - } else { - /* fast symlink */ - inode->i_op = &simple_symlink_inode_operations; - inode->i_link = (char *)oi->i_data; - memcpy(oi->i_data, symname, l); - inode->i_size = l-1; - } - mark_inode_dirty(inode); - - err = exofs_add_nondir(dentry, inode); -out: - return err; - -out_fail: - inode_dec_link_count(inode); - iput(inode); - goto out; -} - -static int exofs_link(struct dentry *old_dentry, struct inode *dir, - struct dentry *dentry) -{ - struct inode *inode = d_inode(old_dentry); - - inode->i_ctime = current_time(inode); - inode_inc_link_count(inode); - ihold(inode); - - return exofs_add_nondir(dentry, inode); -} - -static int exofs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) -{ - struct inode *inode; - int err; - - inode_inc_link_count(dir); - - inode = exofs_new_inode(dir, S_IFDIR | mode); - err = PTR_ERR(inode); - if (IS_ERR(inode)) - goto out_dir; - - inode->i_op = &exofs_dir_inode_operations; - inode->i_fop = &exofs_dir_operations; - inode->i_mapping->a_ops = &exofs_aops; - - inode_inc_link_count(inode); - - err = exofs_make_empty(inode, dir); - if (err) - goto out_fail; - - err = exofs_add_link(dentry, inode); - if (err) - goto out_fail; - - d_instantiate(dentry, inode); -out: - return err; - -out_fail: - inode_dec_link_count(inode); - inode_dec_link_count(inode); - iput(inode); -out_dir: - inode_dec_link_count(dir); - goto out; -} - -static int exofs_unlink(struct inode *dir, struct dentry *dentry) -{ - struct inode *inode = d_inode(dentry); - struct exofs_dir_entry *de; - struct page *page; - int err = -ENOENT; - - de = exofs_find_entry(dir, dentry, &page); - if (!de) - goto out; - - err = exofs_delete_entry(de, page); - if (err) - goto out; - - inode->i_ctime = dir->i_ctime; - inode_dec_link_count(inode); - err = 0; -out: - return err; -} - -static int exofs_rmdir(struct inode *dir, struct dentry *dentry) -{ - struct inode *inode = d_inode(dentry); - int err = -ENOTEMPTY; - - if (exofs_empty_dir(inode)) { - err = exofs_unlink(dir, dentry); - if (!err) { - inode->i_size = 0; - inode_dec_link_count(inode); - inode_dec_link_count(dir); - } - } - return err; -} - -static int exofs_rename(struct inode *old_dir, struct dentry *old_dentry, - struct inode *new_dir, struct dentry *new_dentry, - unsigned int flags) -{ - struct inode *old_inode = d_inode(old_dentry); - struct inode *new_inode = d_inode(new_dentry); - struct page *dir_page = NULL; - struct exofs_dir_entry *dir_de = NULL; - struct page *old_page; - struct exofs_dir_entry *old_de; - int err = -ENOENT; - - if (flags & ~RENAME_NOREPLACE) - return -EINVAL; - - old_de = exofs_find_entry(old_dir, old_dentry, &old_page); - if (!old_de) - goto out; - - if (S_ISDIR(old_inode->i_mode)) { - err = -EIO; - dir_de = exofs_dotdot(old_inode, &dir_page); - if (!dir_de) - goto out_old; - } - - if (new_inode) { - struct page *new_page; - struct exofs_dir_entry *new_de; - - err = -ENOTEMPTY; - if (dir_de && !exofs_empty_dir(new_inode)) - goto out_dir; - - err = -ENOENT; - new_de = exofs_find_entry(new_dir, new_dentry, &new_page); - if (!new_de) - goto out_dir; - err = exofs_set_link(new_dir, new_de, new_page, old_inode); - new_inode->i_ctime = current_time(new_inode); - if (dir_de) - drop_nlink(new_inode); - inode_dec_link_count(new_inode); - if (err) - goto out_dir; - } else { - err = exofs_add_link(new_dentry, old_inode); - if (err) - goto out_dir; - if (dir_de) - inode_inc_link_count(new_dir); - } - - old_inode->i_ctime = current_time(old_inode); - - exofs_delete_entry(old_de, old_page); - mark_inode_dirty(old_inode); - - if (dir_de) { - err = exofs_set_link(old_inode, dir_de, dir_page, new_dir); - inode_dec_link_count(old_dir); - if (err) - goto out_dir; - } - return 0; - - -out_dir: - if (dir_de) { - kunmap(dir_page); - put_page(dir_page); - } -out_old: - kunmap(old_page); - put_page(old_page); -out: - return err; -} - -const struct inode_operations exofs_dir_inode_operations = { - .create = exofs_create, - .lookup = exofs_lookup, - .link = exofs_link, - .unlink = exofs_unlink, - .symlink = exofs_symlink, - .mkdir = exofs_mkdir, - .rmdir = exofs_rmdir, - .mknod = exofs_mknod, - .rename = exofs_rename, - .setattr = exofs_setattr, -}; - -const struct inode_operations exofs_special_inode_operations = { - .setattr = exofs_setattr, -}; diff --git a/fs/exofs/ore.c b/fs/exofs/ore.c deleted file mode 100644 index 5331a15a61f1..000000000000 --- a/fs/exofs/ore.c +++ /dev/null @@ -1,1178 +0,0 @@ -/* - * Copyright (C) 2005, 2006 - * Avishay Traeger (avishay@gmail.com) - * Copyright (C) 2008, 2009 - * Boaz Harrosh <ooo@electrozaur.com> - * - * This file is part of exofs. - * - * exofs is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation. Since it is based on ext2, and the only - * valid version of GPL for the Linux kernel is version 2, the only valid - * version of GPL for exofs is version 2. - * - * exofs is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with exofs; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include <linux/slab.h> -#include <linux/module.h> -#include <asm/div64.h> -#include <linux/lcm.h> - -#include "ore_raid.h" - -MODULE_AUTHOR("Boaz Harrosh <ooo@electrozaur.com>"); -MODULE_DESCRIPTION("Objects Raid Engine ore.ko"); -MODULE_LICENSE("GPL"); - -/* ore_verify_layout does a couple of things: - * 1. Given a minimum number of needed parameters fixes up the rest of the - * members to be operatonals for the ore. The needed parameters are those - * that are defined by the pnfs-objects layout STD. - * 2. Check to see if the current ore code actually supports these parameters - * for example stripe_unit must be a multple of the system PAGE_SIZE, - * and etc... - * 3. Cache some havily used calculations that will be needed by users. - */ - -enum { BIO_MAX_PAGES_KMALLOC = - (PAGE_SIZE - sizeof(struct bio)) / sizeof(struct bio_vec),}; - -int ore_verify_layout(unsigned total_comps, struct ore_layout *layout) -{ - u64 stripe_length; - - switch (layout->raid_algorithm) { - case PNFS_OSD_RAID_0: - layout->parity = 0; - break; - case PNFS_OSD_RAID_5: - layout->parity = 1; - break; - case PNFS_OSD_RAID_PQ: - layout->parity = 2; - break; - case PNFS_OSD_RAID_4: - default: - ORE_ERR("Only RAID_0/5/6 for now received-enum=%d\n", - layout->raid_algorithm); - return -EINVAL; - } - if (0 != (layout->stripe_unit & ~PAGE_MASK)) { - ORE_ERR("Stripe Unit(0x%llx)" - " must be Multples of PAGE_SIZE(0x%lx)\n", - _LLU(layout->stripe_unit), PAGE_SIZE); - return -EINVAL; - } - if (layout->group_width) { - if (!layout->group_depth) { - ORE_ERR("group_depth == 0 && group_width != 0\n"); - return -EINVAL; - } - if (total_comps < (layout->group_width * layout->mirrors_p1)) { - ORE_ERR("Data Map wrong, " - "numdevs=%d < group_width=%d * mirrors=%d\n", - total_comps, layout->group_width, - layout->mirrors_p1); - return -EINVAL; - } - layout->group_count = total_comps / layout->mirrors_p1 / - layout->group_width; - } else { - if (layout->group_depth) { - printk(KERN_NOTICE "Warning: group_depth ignored " - "group_width == 0 && group_depth == %lld\n", - _LLU(layout->group_depth)); - } - layout->group_width = total_comps / layout->mirrors_p1; - layout->group_depth = -1; - layout->group_count = 1; - } - - stripe_length = (u64)layout->group_width * layout->stripe_unit; - if (stripe_length >= (1ULL << 32)) { - ORE_ERR("Stripe_length(0x%llx) >= 32bit is not supported\n", - _LLU(stripe_length)); - return -EINVAL; - } - - layout->max_io_length = - (BIO_MAX_PAGES_KMALLOC * PAGE_SIZE - layout->stripe_unit) * - (layout->group_width - layout->parity); - if (layout->parity) { - unsigned stripe_length = - (layout->group_width - layout->parity) * - layout->stripe_unit; - - layout->max_io_length /= stripe_length; - layout->max_io_length *= stripe_length; - } - ORE_DBGMSG("max_io_length=0x%lx\n", layout->max_io_length); - - return 0; -} -EXPORT_SYMBOL(ore_verify_layout); - -static u8 *_ios_cred(struct ore_io_state *ios, unsigned index) -{ - return ios->oc->comps[index & ios->oc->single_comp].cred; -} - -static struct osd_obj_id *_ios_obj(struct ore_io_state *ios, unsigned index) -{ - return &ios->oc->comps[index & ios->oc->single_comp].obj; -} - -static struct osd_dev *_ios_od(struct ore_io_state *ios, unsigned index) -{ - ORE_DBGMSG2("oc->first_dev=%d oc->numdevs=%d i=%d oc->ods=%p\n", - ios->oc->first_dev, ios->oc->numdevs, index, - ios->oc->ods); - - return ore_comp_dev(ios->oc, index); -} - -int _ore_get_io_state(struct ore_layout *layout, - struct ore_components *oc, unsigned numdevs, - unsigned sgs_per_dev, unsigned num_par_pages, - struct ore_io_state **pios) -{ - struct ore_io_state *ios; - size_t size_ios, size_extra, size_total; - void *ios_extra; - - /* - * The desired layout looks like this, with the extra_allocation - * items pointed at from fields within ios or per_dev: - - struct __alloc_all_io_state { - struct ore_io_state ios; - struct ore_per_dev_state per_dev[numdevs]; - union { - struct osd_sg_entry sglist[sgs_per_dev * numdevs]; - struct page *pages[num_par_pages]; - } extra_allocation; - } whole_allocation; - - */ - - /* This should never happen, so abort early if it ever does. */ - if (sgs_per_dev && num_par_pages) { - ORE_DBGMSG("Tried to use both pages and sglist\n"); - *pios = NULL; - return -EINVAL; - } - - if (numdevs > (INT_MAX - sizeof(*ios)) / - sizeof(struct ore_per_dev_state)) - return -ENOMEM; - size_ios = sizeof(*ios) + sizeof(struct ore_per_dev_state) * numdevs; - - if (sgs_per_dev * numdevs > INT_MAX / sizeof(struct osd_sg_entry)) - return -ENOMEM; - if (num_par_pages > INT_MAX / sizeof(struct page *)) - return -ENOMEM; - size_extra = max(sizeof(struct osd_sg_entry) * (sgs_per_dev * numdevs), - sizeof(struct page *) * num_par_pages); - - size_total = size_ios + size_extra; - - if (likely(size_total <= PAGE_SIZE)) { - ios = kzalloc(size_total, GFP_KERNEL); - if (unlikely(!ios)) { - ORE_DBGMSG("Failed kzalloc bytes=%zd\n", size_total); - *pios = NULL; - return -ENOMEM; - } - ios_extra = (char *)ios + size_ios; - } else { - ios = kzalloc(size_ios, GFP_KERNEL); - if (unlikely(!ios)) { - ORE_DBGMSG("Failed alloc first part bytes=%zd\n", - size_ios); - *pios = NULL; - return -ENOMEM; - } - ios_extra = kzalloc(size_extra, GFP_KERNEL); - if (unlikely(!ios_extra)) { - ORE_DBGMSG("Failed alloc second part bytes=%zd\n", - size_extra); - kfree(ios); - *pios = NULL; - return -ENOMEM; - } - - /* In this case the per_dev[0].sgilist holds the pointer to - * be freed - */ - ios->extra_part_alloc = true; - } - - if (num_par_pages) { - ios->parity_pages = ios_extra; - ios->max_par_pages = num_par_pages; - } - if (sgs_per_dev) { - struct osd_sg_entry *sgilist = ios_extra; - unsigned d; - - for (d = 0; d < numdevs; ++d) { - ios->per_dev[d].sglist = sgilist; - sgilist += sgs_per_dev; - } - ios->sgs_per_dev = sgs_per_dev; - } - - ios->layout = layout; - ios->oc = oc; - *pios = ios; - return 0; -} - -/* Allocate an io_state for only a single group of devices - * - * If a user needs to call ore_read/write() this version must be used becase it - * allocates extra stuff for striping and raid. - * The ore might decide to only IO less then @length bytes do to alignmets - * and constrains as follows: - * - The IO cannot cross group boundary. - * - In raid5/6 The end of the IO must align at end of a stripe eg. - * (@offset + @length) % strip_size == 0. Or the complete range is within a - * single stripe. - * - Memory condition only permitted a shorter IO. (A user can use @length=~0 - * And check the returned ios->length for max_io_size.) - * - * The caller must check returned ios->length (and/or ios->nr_pages) and - * re-issue these pages that fall outside of ios->length - */ -int ore_get_rw_state(struct ore_layout *layout, struct ore_components *oc, - bool is_reading, u64 offset, u64 length, - struct ore_io_state **pios) -{ - struct ore_io_state *ios; - unsigned numdevs = layout->group_width * layout->mirrors_p1; - unsigned sgs_per_dev = 0, max_par_pages = 0; - int ret; - - if (layout->parity && length) { - unsigned data_devs = layout->group_width - layout->parity; - unsigned stripe_size = layout->stripe_unit * data_devs; - unsigned pages_in_unit = layout->stripe_unit / PAGE_SIZE; - u32 remainder; - u64 num_stripes; - u64 num_raid_units; - - num_stripes = div_u64_rem(length, stripe_size, &remainder); - if (remainder) - ++num_stripes; - - num_raid_units = num_stripes * layout->parity; - - if (is_reading) { - /* For reads add per_dev sglist array */ - /* TODO: Raid 6 we need twice more. Actually: - * num_stripes / LCMdP(W,P); - * if (W%P != 0) num_stripes *= parity; - */ - - /* first/last seg is split */ - num_raid_units += layout->group_width; - sgs_per_dev = div_u64(num_raid_units, data_devs) + 2; - } else { - /* For Writes add parity pages array. */ - max_par_pages = num_raid_units * pages_in_unit * - sizeof(struct page *); - } - } - - ret = _ore_get_io_state(layout, oc, numdevs, sgs_per_dev, max_par_pages, - pios); - if (unlikely(ret)) - return ret; - - ios = *pios; - ios->reading = is_reading; - ios->offset = offset; - - if (length) { - ore_calc_stripe_info(layout, offset, length, &ios->si); - ios->length = ios->si.length; - ios->nr_pages = ((ios->offset & (PAGE_SIZE - 1)) + - ios->length + PAGE_SIZE - 1) / PAGE_SIZE; - if (layout->parity) - _ore_post_alloc_raid_stuff(ios); - } - - return 0; -} -EXPORT_SYMBOL(ore_get_rw_state); - -/* Allocate an io_state for all the devices in the comps array - * - * This version of io_state allocation is used mostly by create/remove - * and trunc where we currently need all the devices. The only wastful - * bit is the read/write_attributes with no IO. Those sites should - * be converted to use ore_get_rw_state() with length=0 - */ -int ore_get_io_state(struct ore_layout *layout, struct ore_components *oc, - struct ore_io_state **pios) -{ - return _ore_get_io_state(layout, oc, oc->numdevs, 0, 0, pios); -} -EXPORT_SYMBOL(ore_get_io_state); - -void ore_put_io_state(struct ore_io_state *ios) -{ - if (ios) { - unsigned i; - - for (i = 0; i < ios->numdevs; i++) { - struct ore_per_dev_state *per_dev = &ios->per_dev[i]; - - if (per_dev->or) - osd_end_request(per_dev->or); - if (per_dev->bio) - bio_put(per_dev->bio); - } - - _ore_free_raid_stuff(ios); - kfree(ios); - } -} -EXPORT_SYMBOL(ore_put_io_state); - -static void _sync_done(struct ore_io_state *ios, void *p) -{ - struct completion *waiting = p; - - complete(waiting); -} - -static void _last_io(struct kref *kref) -{ - struct ore_io_state *ios = container_of( - kref, struct ore_io_state, kref); - - ios->done(ios, ios->private); -} - -static void _done_io(struct osd_request *or, void *p) -{ - struct ore_io_state *ios = p; - - kref_put(&ios->kref, _last_io); -} - -int ore_io_execute(struct ore_io_state *ios) -{ - DECLARE_COMPLETION_ONSTACK(wait); - bool sync = (ios->done == NULL); - int i, ret; - - if (sync) { - ios->done = _sync_done; - ios->private = &wait; - } - - for (i = 0; i < ios->numdevs; i++) { - struct osd_request *or = ios->per_dev[i].or; - if (unlikely(!or)) - continue; - - ret = osd_finalize_request(or, 0, _ios_cred(ios, i), NULL); - if (unlikely(ret)) { - ORE_DBGMSG("Failed to osd_finalize_request() => %d\n", - ret); - return ret; - } - } - - kref_init(&ios->kref); - - for (i = 0; i < ios->numdevs; i++) { - struct osd_request *or = ios->per_dev[i].or; - if (unlikely(!or)) - continue; - - kref_get(&ios->kref); - osd_execute_request_async(or, _done_io, ios); - } - - kref_put(&ios->kref, _last_io); - ret = 0; - - if (sync) { - wait_for_completion(&wait); - ret = ore_check_io(ios, NULL); - } - return ret; -} - -static void _clear_bio(struct bio *bio) -{ - struct bio_vec *bv; - unsigned i; - - bio_for_each_segment_all(bv, bio, i) { - unsigned this_count = bv->bv_len; - - if (likely(PAGE_SIZE == this_count)) - clear_highpage(bv->bv_page); - else - zero_user(bv->bv_page, bv->bv_offset, this_count); - } -} - -int ore_check_io(struct ore_io_state *ios, ore_on_dev_error on_dev_error) -{ - enum osd_err_priority acumulated_osd_err = 0; - int acumulated_lin_err = 0; - int i; - - for (i = 0; i < ios->numdevs; i++) { - struct osd_sense_info osi; - struct ore_per_dev_state *per_dev = &ios->per_dev[i]; - struct osd_request *or = per_dev->or; - int ret; - - if (unlikely(!or)) - continue; - - ret = osd_req_decode_sense(or, &osi); - if (likely(!ret)) - continue; - - if ((OSD_ERR_PRI_CLEAR_PAGES == osi.osd_err_pri) && - per_dev->bio) { - /* start read offset passed endof file. - * Note: if we do not have bio it means read-attributes - * In this case we should return error to caller. - */ - _clear_bio(per_dev->bio); - ORE_DBGMSG("start read offset passed end of file " - "offset=0x%llx, length=0x%llx\n", - _LLU(per_dev->offset), - _LLU(per_dev->length)); - - continue; /* we recovered */ - } - - if (on_dev_error) { - u64 residual = ios->reading ? - or->in.residual : or->out.residual; - u64 offset = (ios->offset + ios->length) - residual; - unsigned dev = per_dev->dev - ios->oc->first_dev; - struct ore_dev *od = ios->oc->ods[dev]; - - on_dev_error(ios, od, dev, osi.osd_err_pri, - offset, residual); - } - if (osi.osd_err_pri >= acumulated_osd_err) { - acumulated_osd_err = osi.osd_err_pri; - acumulated_lin_err = ret; - } - } - - return acumulated_lin_err; -} -EXPORT_SYMBOL(ore_check_io); - -/* - * L - logical offset into the file - * - * D - number of Data devices - * D = group_width - parity - * - * U - The number of bytes in a stripe within a group - * U = stripe_unit * D - * - * T - The number of bytes striped within a group of component objects - * (before advancing to the next group) - * T = U * group_depth - * - * S - The number of bytes striped across all component objects - * before the pattern repeats - * S = T * group_count - * - * M - The "major" (i.e., across all components) cycle number - * M = L / S - * - * G - Counts the groups from the beginning of the major cycle - * G = (L - (M * S)) / T [or (L % S) / T] - * - * H - The byte offset within the group - * H = (L - (M * S)) % T [or (L % S) % T] - * - * N - The "minor" (i.e., across the group) stripe number - * N = H / U - * - * C - The component index coresponding to L - * - * C = (H - (N * U)) / stripe_unit + G * D - * [or (L % U) / stripe_unit + G * D] - * - * O - The component offset coresponding to L - * O = L % stripe_unit + N * stripe_unit + M * group_depth * stripe_unit - * - * LCMdP – Parity cycle: Lowest Common Multiple of group_width, parity - * divide by parity - * LCMdP = lcm(group_width, parity) / parity - * - * R - The parity Rotation stripe - * (Note parity cycle always starts at a group's boundary) - * R = N % LCMdP - * - * I = the first parity device index - * I = (group_width + group_width - R*parity - parity) % group_width - * - * Craid - The component index Rotated - * Craid = (group_width + C - R*parity) % group_width - * (We add the group_width to avoid negative numbers modulo math) - */ -void ore_calc_stripe_info(struct ore_layout *layout, u64 file_offset, - u64 length, struct ore_striping_info *si) -{ - u32 stripe_unit = layout->stripe_unit; - u32 group_width = layout->group_width; - u64 group_depth = layout->group_depth; - u32 parity = layout->parity; - - u32 D = group_width - parity; - u32 U = D * stripe_unit; - u64 T = U * group_depth; - u64 S = T * layout->group_count; - u64 M = div64_u64(file_offset, S); - - /* - G = (L - (M * S)) / T - H = (L - (M * S)) % T - */ - u64 LmodS = file_offset - M * S; - u32 G = div64_u64(LmodS, T); - u64 H = LmodS - G * T; - - u32 N = div_u64(H, U); - u32 Nlast; - - /* "H - (N * U)" is just "H % U" so it's bound to u32 */ - u32 C = (u32)(H - (N * U)) / stripe_unit + G * group_width; - u32 first_dev = C - C % group_width; - - div_u64_rem(file_offset, stripe_unit, &si->unit_off); - - si->obj_offset = si->unit_off + (N * stripe_unit) + - (M * group_depth * stripe_unit); - si->cur_comp = C - first_dev; - si->cur_pg = si->unit_off / PAGE_SIZE; - - if (parity) { - u32 LCMdP = lcm(group_width, parity) / parity; - /* R = N % LCMdP; */ - u32 RxP = (N % LCMdP) * parity; - - si->par_dev = (group_width + group_width - parity - RxP) % - group_width + first_dev; - si->dev = (group_width + group_width + C - RxP) % - group_width + first_dev; - si->bytes_in_stripe = U; - si->first_stripe_start = M * S + G * T + N * U; - } else { - /* Make the math correct see _prepare_one_group */ - si->par_dev = group_width; - si->dev = C; - } - - si->dev *= layout->mirrors_p1; - si->par_dev *= layout->mirrors_p1; - si->offset = file_offset; - si->length = T - H; - if (si->length > length) - si->length = length; - - Nlast = div_u64(H + si->length + U - 1, U); - si->maxdevUnits = Nlast - N; - - si->M = M; -} -EXPORT_SYMBOL(ore_calc_stripe_info); - -int _ore_add_stripe_unit(struct ore_io_state *ios, unsigned *cur_pg, - unsigned pgbase, struct page **pages, - struct ore_per_dev_state *per_dev, int cur_len) -{ - unsigned pg = *cur_pg; - struct request_queue *q = - osd_request_queue(_ios_od(ios, per_dev->dev)); - unsigned len = cur_len; - int ret; - - if (per_dev->bio == NULL) { - unsigned bio_size; - - if (!ios->reading) { - bio_size = ios->si.maxdevUnits; - } else { - bio_size = (ios->si.maxdevUnits + 1) * - (ios->layout->group_width - ios->layout->parity) / - ios->layout->group_width; - } - bio_size *= (ios->layout->stripe_unit / PAGE_SIZE); - - per_dev->bio = bio_kmalloc(GFP_KERNEL, bio_size); - if (unlikely(!per_dev->bio)) { - ORE_DBGMSG("Failed to allocate BIO size=%u\n", - bio_size); - ret = -ENOMEM; - goto out; - } - } - - while (cur_len > 0) { - unsigned pglen = min_t(unsigned, PAGE_SIZE - pgbase, cur_len); - unsigned added_len; - - cur_len -= pglen; - - added_len = bio_add_pc_page(q, per_dev->bio, pages[pg], - pglen, pgbase); - if (unlikely(pglen != added_len)) { - /* If bi_vcnt == bi_max then this is a SW BUG */ - ORE_DBGMSG("Failed bio_add_pc_page bi_vcnt=0x%x " - "bi_max=0x%x BIO_MAX=0x%x cur_len=0x%x\n", - per_dev->bio->bi_vcnt, - per_dev->bio->bi_max_vecs, - BIO_MAX_PAGES_KMALLOC, cur_len); - ret = -ENOMEM; - goto out; - } - _add_stripe_page(ios->sp2d, &ios->si, pages[pg]); - - pgbase = 0; - ++pg; - } - BUG_ON(cur_len); - - per_dev->length += len; - *cur_pg = pg; - ret = 0; -out: /* we fail the complete unit on an error eg don't advance - * per_dev->length and cur_pg. This means that we might have a bigger - * bio than the CDB requested length (per_dev->length). That's fine - * only the oposite is fatal. - */ - return ret; -} - -static int _add_parity_units(struct ore_io_state *ios, - struct ore_striping_info *si, - unsigned dev, unsigned first_dev, - unsigned mirrors_p1, unsigned devs_in_group, - unsigned cur_len) -{ - unsigned do_parity; - int ret = 0; - - for (do_parity = ios->layout->parity; do_parity; --do_parity) { - struct ore_per_dev_state *per_dev; - - per_dev = &ios->per_dev[dev - first_dev]; - if (!per_dev->length && !per_dev->offset) { - /* Only/always the parity unit of the first - * stripe will be empty. So this is a chance to - * initialize the per_dev info. - */ - per_dev->dev = dev; - per_dev->offset = si->obj_offset - si->unit_off; - } - - ret = _ore_add_parity_unit(ios, si, per_dev, cur_len, - do_parity == 1); - if (unlikely(ret)) - break; - - if (do_parity != 1) { - dev = ((dev + mirrors_p1) % devs_in_group) + first_dev; - si->cur_comp = (si->cur_comp + 1) % - ios->layout->group_width; - } - } - - return ret; -} - -static int _prepare_for_striping(struct ore_io_state *ios) -{ - struct ore_striping_info *si = &ios->si; - unsigned stripe_unit = ios->layout->stripe_unit; - unsigned mirrors_p1 = ios->layout->mirrors_p1; - unsigned group_width = ios->layout->group_width; - unsigned devs_in_group = group_width * mirrors_p1; - unsigned dev = si->dev; - unsigned first_dev = dev - (dev % devs_in_group); - unsigned cur_pg = ios->pages_consumed; - u64 length = ios->length; - int ret = 0; - - if (!ios->pages) { - ios->numdevs = ios->layout->mirrors_p1; - return 0; - } - - BUG_ON(length > si->length); - - while (length) { - struct ore_per_dev_state *per_dev = - &ios->per_dev[dev - first_dev]; - unsigned cur_len, page_off = 0; - - if (!per_dev->length && !per_dev->offset) { - /* First time initialize the per_dev info. */ - per_dev->dev = dev; - if (dev == si->dev) { - WARN_ON(dev == si->par_dev); - per_dev->offset = si->obj_offset; - cur_len = stripe_unit - si->unit_off; - page_off = si->unit_off & ~PAGE_MASK; - BUG_ON(page_off && (page_off != ios->pgbase)); - } else { - per_dev->offset = si->obj_offset - si->unit_off; - cur_len = stripe_unit; - } - } else { - cur_len = stripe_unit; - } - if (cur_len >= length) - cur_len = length; - - ret = _ore_add_stripe_unit(ios, &cur_pg, page_off, ios->pages, - per_dev, cur_len); - if (unlikely(ret)) - goto out; - - length -= cur_len; - - dev = ((dev + mirrors_p1) % devs_in_group) + first_dev; - si->cur_comp = (si->cur_comp + 1) % group_width; - if (unlikely((dev == si->par_dev) || (!length && ios->sp2d))) { - if (!length && ios->sp2d) { - /* If we are writing and this is the very last - * stripe. then operate on parity dev. - */ - dev = si->par_dev; - /* If last stripe operate on parity comp */ - si->cur_comp = group_width - ios->layout->parity; - } - - /* In writes cur_len just means if it's the - * last one. See _ore_add_parity_unit. - */ - ret = _add_parity_units(ios, si, dev, first_dev, - mirrors_p1, devs_in_group, - ios->sp2d ? length : cur_len); - if (unlikely(ret)) - goto out; - - /* Rotate next par_dev backwards with wraping */ - si->par_dev = (devs_in_group + si->par_dev - - ios->layout->parity * mirrors_p1) % - devs_in_group + first_dev; - /* Next stripe, start fresh */ - si->cur_comp = 0; - si->cur_pg = 0; - si->obj_offset += cur_len; - si->unit_off = 0; - } - } -out: - ios->numdevs = devs_in_group; - ios->pages_consumed = cur_pg; - return ret; -} - -int ore_create(struct ore_io_state *ios) -{ - int i, ret; - - for (i = 0; i < ios->oc->numdevs; i++) { - struct osd_request *or; - - or = osd_start_request(_ios_od(ios, i)); - if (unlikely(!or)) { - ORE_ERR("%s: osd_start_request failed\n", __func__); - ret = -ENOMEM; - goto out; - } - ios->per_dev[i].or = or; - ios->numdevs++; - - osd_req_create_object(or, _ios_obj(ios, i)); - } - ret = ore_io_execute(ios); - -out: - return ret; -} -EXPORT_SYMBOL(ore_create); - -int ore_remove(struct ore_io_state *ios) -{ - int i, ret; - - for (i = 0; i < ios->oc->numdevs; i++) { - struct osd_request *or; - - or = osd_start_request(_ios_od(ios, i)); - if (unlikely(!or)) { - ORE_ERR("%s: osd_start_request failed\n", __func__); - ret = -ENOMEM; - goto out; - } - ios->per_dev[i].or = or; - ios->numdevs++; - - osd_req_remove_object(or, _ios_obj(ios, i)); - } - ret = ore_io_execute(ios); - -out: - return ret; -} -EXPORT_SYMBOL(ore_remove); - -static int _write_mirror(struct ore_io_state *ios, int cur_comp) -{ - struct ore_per_dev_state *master_dev = &ios->per_dev[cur_comp]; - unsigned dev = ios->per_dev[cur_comp].dev; - unsigned last_comp = cur_comp + ios->layout->mirrors_p1; - int ret = 0; - - if (ios->pages && !master_dev->length) - return 0; /* Just an empty slot */ - - for (; cur_comp < last_comp; ++cur_comp, ++dev) { - struct ore_per_dev_state *per_dev = &ios->per_dev[cur_comp]; - struct osd_request *or; - - or = osd_start_request(_ios_od(ios, dev)); - if (unlikely(!or)) { - ORE_ERR("%s: osd_start_request failed\n", __func__); - ret = -ENOMEM; - goto out; - } - per_dev->or = or; - - if (ios->pages) { - struct bio *bio; - - if (per_dev != master_dev) { - bio = bio_clone_fast(master_dev->bio, - GFP_KERNEL, NULL); - if (unlikely(!bio)) { - ORE_DBGMSG( - "Failed to allocate BIO size=%u\n", - master_dev->bio->bi_max_vecs); - ret = -ENOMEM; - goto out; - } - - bio->bi_disk = NULL; - bio->bi_next = NULL; - per_dev->offset = master_dev->offset; - per_dev->length = master_dev->length; - per_dev->bio = bio; - per_dev->dev = dev; - } else { - bio = master_dev->bio; - /* FIXME: bio_set_dir() */ - bio_set_op_attrs(bio, REQ_OP_WRITE, 0); - } - - osd_req_write(or, _ios_obj(ios, cur_comp), - per_dev->offset, bio, per_dev->length); - ORE_DBGMSG("write(0x%llx) offset=0x%llx " - "length=0x%llx dev=%d\n", - _LLU(_ios_obj(ios, cur_comp)->id), - _LLU(per_dev->offset), - _LLU(per_dev->length), dev); - } else if (ios->kern_buff) { - per_dev->offset = ios->si.obj_offset; - per_dev->dev = ios->si.dev + dev; - - /* no cross device without page array */ - BUG_ON((ios->layout->group_width > 1) && - (ios->si.unit_off + ios->length > - ios->layout->stripe_unit)); - - ret = osd_req_write_kern(or, _ios_obj(ios, cur_comp), - per_dev->offset, - ios->kern_buff, ios->length); - if (unlikely(ret)) - goto out; - ORE_DBGMSG2("write_kern(0x%llx) offset=0x%llx " - "length=0x%llx dev=%d\n", - _LLU(_ios_obj(ios, cur_comp)->id), - _LLU(per_dev->offset), - _LLU(ios->length), per_dev->dev); - } else { - osd_req_set_attributes(or, _ios_obj(ios, cur_comp)); - ORE_DBGMSG2("obj(0x%llx) set_attributes=%d dev=%d\n", - _LLU(_ios_obj(ios, cur_comp)->id), - ios->out_attr_len, dev); - } - - if (ios->out_attr) - osd_req_add_set_attr_list(or, ios->out_attr, - ios->out_attr_len); - - if (ios->in_attr) - osd_req_add_get_attr_list(or, ios->in_attr, - ios->in_attr_len); - } - -out: - return ret; -} - -int ore_write(struct ore_io_state *ios) -{ - int i; - int ret; - - if (unlikely(ios->sp2d && !ios->r4w)) { - /* A library is attempting a RAID-write without providing - * a pages lock interface. - */ - WARN_ON_ONCE(1); - return -ENOTSUPP; - } - - ret = _prepare_for_striping(ios); - if (unlikely(ret)) - return ret; - - for (i = 0; i < ios->numdevs; i += ios->layout->mirrors_p1) { - ret = _write_mirror(ios, i); - if (unlikely(ret)) - return ret; - } - - ret = ore_io_execute(ios); - return ret; -} -EXPORT_SYMBOL(ore_write); - -int _ore_read_mirror(struct ore_io_state *ios, unsigned cur_comp) -{ - struct osd_request *or; - struct ore_per_dev_state *per_dev = &ios->per_dev[cur_comp]; - struct osd_obj_id *obj = _ios_obj(ios, cur_comp); - unsigned first_dev = (unsigned)obj->id; - - if (ios->pages && !per_dev->length) - return 0; /* Just an empty slot */ - - first_dev = per_dev->dev + first_dev % ios->layout->mirrors_p1; - or = osd_start_request(_ios_od(ios, first_dev)); - if (unlikely(!or)) { - ORE_ERR("%s: osd_start_request failed\n", __func__); - return -ENOMEM; - } - per_dev->or = or; - - if (ios->pages) { - if (per_dev->cur_sg) { - /* finalize the last sg_entry */ - _ore_add_sg_seg(per_dev, 0, false); - if (unlikely(!per_dev->cur_sg)) - return 0; /* Skip parity only device */ - - osd_req_read_sg(or, obj, per_dev->bio, - per_dev->sglist, per_dev->cur_sg); - } else { - /* The no raid case */ - osd_req_read(or, obj, per_dev->offset, - per_dev->bio, per_dev->length); - } - - ORE_DBGMSG("read(0x%llx) offset=0x%llx length=0x%llx" - " dev=%d sg_len=%d\n", _LLU(obj->id), - _LLU(per_dev->offset), _LLU(per_dev->length), - first_dev, per_dev->cur_sg); - } else { - BUG_ON(ios->kern_buff); - - osd_req_get_attributes(or, obj); - ORE_DBGMSG2("obj(0x%llx) get_attributes=%d dev=%d\n", - _LLU(obj->id), - ios->in_attr_len, first_dev); - } - if (ios->out_attr) - osd_req_add_set_attr_list(or, ios->out_attr, ios->out_attr_len); - - if (ios->in_attr) - osd_req_add_get_attr_list(or, ios->in_attr, ios->in_attr_len); - - return 0; -} - -int ore_read(struct ore_io_state *ios) -{ - int i; - int ret; - - ret = _prepare_for_striping(ios); - if (unlikely(ret)) - return ret; - - for (i = 0; i < ios->numdevs; i += ios->layout->mirrors_p1) { - ret = _ore_read_mirror(ios, i); - if (unlikely(ret)) - return ret; - } - - ret = ore_io_execute(ios); - return ret; -} -EXPORT_SYMBOL(ore_read); - -int extract_attr_from_ios(struct ore_io_state *ios, struct osd_attr *attr) -{ - struct osd_attr cur_attr = {.attr_page = 0}; /* start with zeros */ - void *iter = NULL; - int nelem; - - do { - nelem = 1; - osd_req_decode_get_attr_list(ios->per_dev[0].or, - &cur_attr, &nelem, &iter); - if ((cur_attr.attr_page == attr->attr_page) && - (cur_attr.attr_id == attr->attr_id)) { - attr->len = cur_attr.len; - attr->val_ptr = cur_attr.val_ptr; - return 0; - } - } while (iter); - - return -EIO; -} -EXPORT_SYMBOL(extract_attr_from_ios); - -static int _truncate_mirrors(struct ore_io_state *ios, unsigned cur_comp, - struct osd_attr *attr) -{ - int last_comp = cur_comp + ios->layout->mirrors_p1; - - for (; cur_comp < last_comp; ++cur_comp) { - struct ore_per_dev_state *per_dev = &ios->per_dev[cur_comp]; - struct osd_request *or; - - or = osd_start_request(_ios_od(ios, cur_comp)); - if (unlikely(!or)) { - ORE_ERR("%s: osd_start_request failed\n", __func__); - return -ENOMEM; - } - per_dev->or = or; - - osd_req_set_attributes(or, _ios_obj(ios, cur_comp)); - osd_req_add_set_attr_list(or, attr, 1); - } - - return 0; -} - -struct _trunc_info { - struct ore_striping_info si; - u64 prev_group_obj_off; - u64 next_group_obj_off; - - unsigned first_group_dev; - unsigned nex_group_dev; -}; - -static void _calc_trunk_info(struct ore_layout *layout, u64 file_offset, - struct _trunc_info *ti) -{ - unsigned stripe_unit = layout->stripe_unit; - - ore_calc_stripe_info(layout, file_offset, 0, &ti->si); - - ti->prev_group_obj_off = ti->si.M * stripe_unit; - ti->next_group_obj_off = ti->si.M ? (ti->si.M - 1) * stripe_unit : 0; - - ti->first_group_dev = ti->si.dev - (ti->si.dev % layout->group_width); - ti->nex_group_dev = ti->first_group_dev + layout->group_width; -} - -int ore_truncate(struct ore_layout *layout, struct ore_components *oc, - u64 size) -{ - struct ore_io_state *ios; - struct exofs_trunc_attr { - struct osd_attr attr; - __be64 newsize; - } *size_attrs; - struct _trunc_info ti; - int i, ret; - - ret = ore_get_io_state(layout, oc, &ios); - if (unlikely(ret)) - return ret; - - _calc_trunk_info(ios->layout, size, &ti); - - size_attrs = kcalloc(ios->oc->numdevs, sizeof(*size_attrs), - GFP_KERNEL); - if (unlikely(!size_attrs)) { - ret = -ENOMEM; - goto out; - } - - ios->numdevs = ios->oc->numdevs; - - for (i = 0; i < ios->numdevs; ++i) { - struct exofs_trunc_attr *size_attr = &size_attrs[i]; - u64 obj_size; - - if (i < ti.first_group_dev) - obj_size = ti.prev_group_obj_off; - else if (i >= ti.nex_group_dev) - obj_size = ti.next_group_obj_off; - else if (i < ti.si.dev) /* dev within this group */ - obj_size = ti.si.obj_offset + - ios->layout->stripe_unit - ti.si.unit_off; - else if (i == ti.si.dev) - obj_size = ti.si.obj_offset; - else /* i > ti.dev */ - obj_size = ti.si.obj_offset - ti.si.unit_off; - - size_attr->newsize = cpu_to_be64(obj_size); - size_attr->attr = g_attr_logical_length; - size_attr->attr.val_ptr = &size_attr->newsize; - - ORE_DBGMSG2("trunc(0x%llx) obj_offset=0x%llx dev=%d\n", - _LLU(oc->comps->obj.id), _LLU(obj_size), i); - ret = _truncate_mirrors(ios, i * ios->layout->mirrors_p1, - &size_attr->attr); - if (unlikely(ret)) - goto out; - } - ret = ore_io_execute(ios); - -out: - kfree(size_attrs); - ore_put_io_state(ios); - return ret; -} -EXPORT_SYMBOL(ore_truncate); - -const struct osd_attr g_attr_logical_length = ATTR_DEF( - OSD_APAGE_OBJECT_INFORMATION, OSD_ATTR_OI_LOGICAL_LENGTH, 8); -EXPORT_SYMBOL(g_attr_logical_length); diff --git a/fs/exofs/ore_raid.c b/fs/exofs/ore_raid.c deleted file mode 100644 index 199590f36203..000000000000 --- a/fs/exofs/ore_raid.c +++ /dev/null @@ -1,756 +0,0 @@ -/* - * Copyright (C) 2011 - * Boaz Harrosh <ooo@electrozaur.com> - * - * This file is part of the objects raid engine (ore). - * - * It is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as published - * by the Free Software Foundation. - * - * You should have received a copy of the GNU General Public License - * along with "ore". If not, write to the Free Software Foundation, Inc: - * "Free Software Foundation <info@fsf.org>" - */ - -#include <linux/gfp.h> -#include <linux/async_tx.h> - -#include "ore_raid.h" - -#undef ORE_DBGMSG2 -#define ORE_DBGMSG2 ORE_DBGMSG - -static struct page *_raid_page_alloc(void) -{ - return alloc_page(GFP_KERNEL); -} - -static void _raid_page_free(struct page *p) -{ - __free_page(p); -} - -/* This struct is forward declare in ore_io_state, but is private to here. - * It is put on ios->sp2d for RAID5/6 writes only. See _gen_xor_unit. - * - * __stripe_pages_2d is a 2d array of pages, and it is also a corner turn. - * Ascending page index access is sp2d(p-minor, c-major). But storage is - * sp2d[p-minor][c-major], so it can be properlly presented to the async-xor - * API. - */ -struct __stripe_pages_2d { - /* Cache some hot path repeated calculations */ - unsigned parity; - unsigned data_devs; - unsigned pages_in_unit; - - bool needed ; - - /* Array size is pages_in_unit (layout->stripe_unit / PAGE_SIZE) */ - struct __1_page_stripe { - bool alloc; - unsigned write_count; - struct async_submit_ctl submit; - struct dma_async_tx_descriptor *tx; - - /* The size of this array is data_devs + parity */ - struct page **pages; - struct page **scribble; - /* bool array, size of this array is data_devs */ - char *page_is_read; - } _1p_stripes[]; -}; - -/* This can get bigger then a page. So support multiple page allocations - * _sp2d_free should be called even if _sp2d_alloc fails (by returning - * none-zero). - */ -static int _sp2d_alloc(unsigned pages_in_unit, unsigned group_width, - unsigned parity, struct __stripe_pages_2d **psp2d) -{ - struct __stripe_pages_2d *sp2d; - unsigned data_devs = group_width - parity; - - /* - * Desired allocation layout is, though when larger than PAGE_SIZE, - * each struct __alloc_1p_arrays is separately allocated: - - struct _alloc_all_bytes { - struct __alloc_stripe_pages_2d { - struct __stripe_pages_2d sp2d; - struct __1_page_stripe _1p_stripes[pages_in_unit]; - } __asp2d; - struct __alloc_1p_arrays { - struct page *pages[group_width]; - struct page *scribble[group_width]; - char page_is_read[data_devs]; - } __a1pa[pages_in_unit]; - } *_aab; - - struct __alloc_1p_arrays *__a1pa; - struct __alloc_1p_arrays *__a1pa_end; - - */ - - char *__a1pa; - char *__a1pa_end; - - const size_t sizeof_stripe_pages_2d = - sizeof(struct __stripe_pages_2d) + - sizeof(struct __1_page_stripe) * pages_in_unit; - const size_t sizeof__a1pa = - ALIGN(sizeof(struct page *) * (2 * group_width) + data_devs, - sizeof(void *)); - const size_t sizeof__a1pa_arrays = sizeof__a1pa * pages_in_unit; - const size_t alloc_total = sizeof_stripe_pages_2d + - sizeof__a1pa_arrays; - - unsigned num_a1pa, alloc_size, i; - - /* FIXME: check these numbers in ore_verify_layout */ - BUG_ON(sizeof_stripe_pages_2d > PAGE_SIZE); - BUG_ON(sizeof__a1pa > PAGE_SIZE); - - /* - * If alloc_total would be larger than PAGE_SIZE, only allocate - * as many a1pa items as would fill the rest of the page, instead - * of the full pages_in_unit count. - */ - if (alloc_total > PAGE_SIZE) { - num_a1pa = (PAGE_SIZE - sizeof_stripe_pages_2d) / sizeof__a1pa; - alloc_size = sizeof_stripe_pages_2d + sizeof__a1pa * num_a1pa; - } else { - num_a1pa = pages_in_unit; - alloc_size = alloc_total; - } - - *psp2d = sp2d = kzalloc(alloc_size, GFP_KERNEL); - if (unlikely(!sp2d)) { - ORE_DBGMSG("!! Failed to alloc sp2d size=%d\n", alloc_size); - return -ENOMEM; - } - /* From here Just call _sp2d_free */ - - /* Find start of a1pa area. */ - __a1pa = (char *)sp2d + sizeof_stripe_pages_2d; - /* Find end of the _allocated_ a1pa area. */ - __a1pa_end = __a1pa + alloc_size; - - /* Allocate additionally needed a1pa items in PAGE_SIZE chunks. */ - for (i = 0; i < pages_in_unit; ++i) { - struct __1_page_stripe *stripe = &sp2d->_1p_stripes[i]; - - if (unlikely(__a1pa >= __a1pa_end)) { - num_a1pa = min_t(unsigned, PAGE_SIZE / sizeof__a1pa, - pages_in_unit - i); - alloc_size = sizeof__a1pa * num_a1pa; - - __a1pa = kzalloc(alloc_size, GFP_KERNEL); - if (unlikely(!__a1pa)) { - ORE_DBGMSG("!! Failed to _alloc_1p_arrays=%d\n", - num_a1pa); - return -ENOMEM; - } - __a1pa_end = __a1pa + alloc_size; - /* First *pages is marked for kfree of the buffer */ - stripe->alloc = true; - } - - /* - * Attach all _lp_stripes pointers to the allocation for - * it which was either part of the original PAGE_SIZE - * allocation or the subsequent allocation in this loop. - */ - stripe->pages = (void *)__a1pa; - stripe->scribble = stripe->pages + group_width; - stripe->page_is_read = (char *)stripe->scribble + group_width; - __a1pa += sizeof__a1pa; - } - - sp2d->parity = parity; - sp2d->data_devs = data_devs; - sp2d->pages_in_unit = pages_in_unit; - return 0; -} - -static void _sp2d_reset(struct __stripe_pages_2d *sp2d, - const struct _ore_r4w_op *r4w, void *priv) -{ - unsigned data_devs = sp2d->data_devs; - unsigned group_width = data_devs + sp2d->parity; - int p, c; - - if (!sp2d->needed) - return; - - for (c = data_devs - 1; c >= 0; --c) - for (p = sp2d->pages_in_unit - 1; p >= 0; --p) { - struct __1_page_stripe *_1ps = &sp2d->_1p_stripes[p]; - - if (_1ps->page_is_read[c]) { - struct page *page = _1ps->pages[c]; - - r4w->put_page(priv, page); - _1ps->page_is_read[c] = false; - } - } - - for (p = 0; p < sp2d->pages_in_unit; p++) { - struct __1_page_stripe *_1ps = &sp2d->_1p_stripes[p]; - - memset(_1ps->pages, 0, group_width * sizeof(*_1ps->pages)); - _1ps->write_count = 0; - _1ps->tx = NULL; - } - - sp2d->needed = false; -} - -static void _sp2d_free(struct __stripe_pages_2d *sp2d) -{ - unsigned i; - - if (!sp2d) - return; - - for (i = 0; i < sp2d->pages_in_unit; ++i) { - if (sp2d->_1p_stripes[i].alloc) - kfree(sp2d->_1p_stripes[i].pages); - } - - kfree(sp2d); -} - -static unsigned _sp2d_min_pg(struct __stripe_pages_2d *sp2d) -{ - unsigned p; - - for (p = 0; p < sp2d->pages_in_unit; p++) { - struct __1_page_stripe *_1ps = &sp2d->_1p_stripes[p]; - - if (_1ps->write_count) - return p; - } - - return ~0; -} - -static unsigned _sp2d_max_pg(struct __stripe_pages_2d *sp2d) -{ - int p; - - for (p = sp2d->pages_in_unit - 1; p >= 0; --p) { - struct __1_page_stripe *_1ps = &sp2d->_1p_stripes[p]; - - if (_1ps->write_count) - return p; - } - - return ~0; -} - -static void _gen_xor_unit(struct __stripe_pages_2d *sp2d) -{ - unsigned p; - unsigned tx_flags = ASYNC_TX_ACK; - - if (sp2d->parity == 1) - tx_flags |= ASYNC_TX_XOR_ZERO_DST; - - for (p = 0; p < sp2d->pages_in_unit; p++) { - struct __1_page_stripe *_1ps = &sp2d->_1p_stripes[p]; - - if (!_1ps->write_count) - continue; - - init_async_submit(&_1ps->submit, tx_flags, - NULL, NULL, NULL, (addr_conv_t *)_1ps->scribble); - - if (sp2d->parity == 1) - _1ps->tx = async_xor(_1ps->pages[sp2d->data_devs], - _1ps->pages, 0, sp2d->data_devs, - PAGE_SIZE, &_1ps->submit); - else /* parity == 2 */ - _1ps->tx = async_gen_syndrome(_1ps->pages, 0, - sp2d->data_devs + sp2d->parity, - PAGE_SIZE, &_1ps->submit); - } - - for (p = 0; p < sp2d->pages_in_unit; p++) { - struct __1_page_stripe *_1ps = &sp2d->_1p_stripes[p]; - /* NOTE: We wait for HW synchronously (I don't have such HW - * to test with.) Is parallelism needed with today's multi - * cores? - */ - async_tx_issue_pending(_1ps->tx); - } -} - -void _ore_add_stripe_page(struct __stripe_pages_2d *sp2d, - struct ore_striping_info *si, struct page *page) -{ - struct __1_page_stripe *_1ps; - - sp2d->needed = true; - - _1ps = &sp2d->_1p_stripes[si->cur_pg]; - _1ps->pages[si->cur_comp] = page; - ++_1ps->write_count; - - si->cur_pg = (si->cur_pg + 1) % sp2d->pages_in_unit; - /* si->cur_comp is advanced outside at main loop */ -} - -void _ore_add_sg_seg(struct ore_per_dev_state *per_dev, unsigned cur_len, - bool not_last) -{ - struct osd_sg_entry *sge; - - ORE_DBGMSG("dev=%d cur_len=0x%x not_last=%d cur_sg=%d " - "offset=0x%llx length=0x%x last_sgs_total=0x%x\n", - per_dev->dev, cur_len, not_last, per_dev->cur_sg, - _LLU(per_dev->offset), per_dev->length, - per_dev->last_sgs_total); - - if (!per_dev->cur_sg) { - sge = per_dev->sglist; - - /* First time we prepare two entries */ - if (per_dev->length) { - ++per_dev->cur_sg; - sge->offset = per_dev->offset; - sge->len = per_dev->length; - } else { - /* Here the parity is the first unit of this object. - * This happens every time we reach a parity device on - * the same stripe as the per_dev->offset. We need to - * just skip this unit. - */ - per_dev->offset += cur_len; - return; - } - } else { - /* finalize the last one */ - sge = &per_dev->sglist[per_dev->cur_sg - 1]; - sge->len = per_dev->length - per_dev->last_sgs_total; - } - - if (not_last) { - /* Partly prepare the next one */ - struct osd_sg_entry *next_sge = sge + 1; - - ++per_dev->cur_sg; - next_sge->offset = sge->offset + sge->len + cur_len; - /* Save cur len so we know how mutch was added next time */ - per_dev->last_sgs_total = per_dev->length; - next_sge->len = 0; - } else if (!sge->len) { - /* Optimize for when the last unit is a parity */ - --per_dev->cur_sg; - } -} - -static int _alloc_read_4_write(struct ore_io_state *ios) -{ - struct ore_layout *layout = ios->layout; - int ret; - /* We want to only read those pages not in cache so worst case - * is a stripe populated with every other page - */ - unsigned sgs_per_dev = ios->sp2d->pages_in_unit + 2; - - ret = _ore_get_io_state(layout, ios->oc, - layout->group_width * layout->mirrors_p1, - sgs_per_dev, 0, &ios->ios_read_4_write); - return ret; -} - -/* @si contains info of the to-be-inserted page. Update of @si should be - * maintained by caller. Specificaly si->dev, si->obj_offset, ... - */ -static int _add_to_r4w(struct ore_io_state *ios, struct ore_striping_info *si, - struct page *page, unsigned pg_len) -{ - struct request_queue *q; - struct ore_per_dev_state *per_dev; - struct ore_io_state *read_ios; - unsigned first_dev = si->dev - (si->dev % - (ios->layout->group_width * ios->layout->mirrors_p1)); - unsigned comp = si->dev - first_dev; - unsigned added_len; - - if (!ios->ios_read_4_write) { - int ret = _alloc_read_4_write(ios); - - if (unlikely(ret)) - return ret; - } - - read_ios = ios->ios_read_4_write; - read_ios->numdevs = ios->layout->group_width * ios->layout->mirrors_p1; - - per_dev = &read_ios->per_dev[comp]; - if (!per_dev->length) { - per_dev->bio = bio_kmalloc(GFP_KERNEL, - ios->sp2d->pages_in_unit); - if (unlikely(!per_dev->bio)) { - ORE_DBGMSG("Failed to allocate BIO size=%u\n", - ios->sp2d->pages_in_unit); - return -ENOMEM; - } - per_dev->offset = si->obj_offset; - per_dev->dev = si->dev; - } else if (si->obj_offset != (per_dev->offset + per_dev->length)) { - u64 gap = si->obj_offset - (per_dev->offset + per_dev->length); - - _ore_add_sg_seg(per_dev, gap, true); - } - q = osd_request_queue(ore_comp_dev(read_ios->oc, per_dev->dev)); - added_len = bio_add_pc_page(q, per_dev->bio, page, pg_len, - si->obj_offset % PAGE_SIZE); - if (unlikely(added_len != pg_len)) { - ORE_DBGMSG("Failed to bio_add_pc_page bi_vcnt=%d\n", - per_dev->bio->bi_vcnt); - return -ENOMEM; - } - - per_dev->length += pg_len; - return 0; -} - -/* read the beginning of an unaligned first page */ -static int _add_to_r4w_first_page(struct ore_io_state *ios, struct page *page) -{ - struct ore_striping_info si; - unsigned pg_len; - - ore_calc_stripe_info(ios->layout, ios->offset, 0, &si); - - pg_len = si.obj_offset % PAGE_SIZE; - si.obj_offset -= pg_len; - - ORE_DBGMSG("offset=0x%llx len=0x%x index=0x%lx dev=%x\n", - _LLU(si.obj_offset), pg_len, page->index, si.dev); - - return _add_to_r4w(ios, &si, page, pg_len); -} - -/* read the end of an incomplete last page */ -static int _add_to_r4w_last_page(struct ore_io_state *ios, u64 *offset) -{ - struct ore_striping_info si; - struct page *page; - unsigned pg_len, p, c; - - ore_calc_stripe_info(ios->layout, *offset, 0, &si); - - p = si.cur_pg; - c = si.cur_comp; - page = ios->sp2d->_1p_stripes[p].pages[c]; - - pg_len = PAGE_SIZE - (si.unit_off % PAGE_SIZE); - *offset += pg_len; - - ORE_DBGMSG("p=%d, c=%d next-offset=0x%llx len=0x%x dev=%x par_dev=%d\n", - p, c, _LLU(*offset), pg_len, si.dev, si.par_dev); - - BUG_ON(!page); - - return _add_to_r4w(ios, &si, page, pg_len); -} - -static void _mark_read4write_pages_uptodate(struct ore_io_state *ios, int ret) -{ - struct bio_vec *bv; - unsigned i, d; - - /* loop on all devices all pages */ - for (d = 0; d < ios->numdevs; d++) { - struct bio *bio = ios->per_dev[d].bio; - - if (!bio) - continue; - - bio_for_each_segment_all(bv, bio, i) { - struct page *page = bv->bv_page; - - SetPageUptodate(page); - if (PageError(page)) - ClearPageError(page); - } - } -} - -/* read_4_write is hacked to read the start of the first stripe and/or - * the end of the last stripe. If needed, with an sg-gap at each device/page. - * It is assumed to be called after the to_be_written pages of the first stripe - * are populating ios->sp2d[][] - * - * NOTE: We call ios->r4w->lock_fn for all pages needed for parity calculations - * These pages are held at sp2d[p].pages[c] but with - * sp2d[p].page_is_read[c] = true. At _sp2d_reset these pages are - * ios->r4w->lock_fn(). The ios->r4w->lock_fn might signal that the page is - * @uptodate=true, so we don't need to read it, only unlock, after IO. - * - * TODO: The read_4_write should calc a need_to_read_pages_count, if bigger then - * to-be-written count, we should consider the xor-in-place mode. - * need_to_read_pages_count is the actual number of pages not present in cache. - * maybe "devs_in_group - ios->sp2d[p].write_count" is a good enough - * approximation? In this mode the read pages are put in the empty places of - * ios->sp2d[p][*], xor is calculated the same way. These pages are - * allocated/freed and don't go through cache - */ -static int _read_4_write_first_stripe(struct ore_io_state *ios) -{ - struct ore_striping_info read_si; - struct __stripe_pages_2d *sp2d = ios->sp2d; - u64 offset = ios->si.first_stripe_start; - unsigned c, p, min_p = sp2d->pages_in_unit, max_p = -1; - - if (offset == ios->offset) /* Go to start collect $200 */ - goto read_last_stripe; - - min_p = _sp2d_min_pg(sp2d); - max_p = _sp2d_max_pg(sp2d); - - ORE_DBGMSG("stripe_start=0x%llx ios->offset=0x%llx min_p=%d max_p=%d\n", - offset, ios->offset, min_p, max_p); - - for (c = 0; ; c++) { - ore_calc_stripe_info(ios->layout, offset, 0, &read_si); - read_si.obj_offset += min_p * PAGE_SIZE; - offset += min_p * PAGE_SIZE; - for (p = min_p; p <= max_p; p++) { - struct __1_page_stripe *_1ps = &sp2d->_1p_stripes[p]; - struct page **pp = &_1ps->pages[c]; - bool uptodate; - - if (*pp) { - if (ios->offset % PAGE_SIZE) - /* Read the remainder of the page */ - _add_to_r4w_first_page(ios, *pp); - /* to-be-written pages start here */ - goto read_last_stripe; - } - - *pp = ios->r4w->get_page(ios->private, offset, - &uptodate); - if (unlikely(!*pp)) - return -ENOMEM; - - if (!uptodate) - _add_to_r4w(ios, &read_si, *pp, PAGE_SIZE); - - /* Mark read-pages to be cache_released */ - _1ps->page_is_read[c] = true; - read_si.obj_offset += PAGE_SIZE; - offset += PAGE_SIZE; - } - offset += (sp2d->pages_in_unit - p) * PAGE_SIZE; - } - -read_last_stripe: - return 0; -} - -static int _read_4_write_last_stripe(struct ore_io_state *ios) -{ - struct ore_striping_info read_si; - struct __stripe_pages_2d *sp2d = ios->sp2d; - u64 offset; - u64 last_stripe_end; - unsigned bytes_in_stripe = ios->si.bytes_in_stripe; - unsigned c, p, min_p = sp2d->pages_in_unit, max_p = -1; - - offset = ios->offset + ios->length; - if (offset % PAGE_SIZE) - _add_to_r4w_last_page(ios, &offset); - /* offset will be aligned to next page */ - - last_stripe_end = div_u64(offset + bytes_in_stripe - 1, bytes_in_stripe) - * bytes_in_stripe; - if (offset == last_stripe_end) /* Optimize for the aligned case */ - goto read_it; - - ore_calc_stripe_info(ios->layout, offset, 0, &read_si); - p = read_si.cur_pg; - c = read_si.cur_comp; - - if (min_p == sp2d->pages_in_unit) { - /* Didn't do it yet */ - min_p = _sp2d_min_pg(sp2d); - max_p = _sp2d_max_pg(sp2d); - } - - ORE_DBGMSG("offset=0x%llx stripe_end=0x%llx min_p=%d max_p=%d\n", - offset, last_stripe_end, min_p, max_p); - - while (offset < last_stripe_end) { - struct __1_page_stripe *_1ps = &sp2d->_1p_stripes[p]; - - if ((min_p <= p) && (p <= max_p)) { - struct page *page; - bool uptodate; - - BUG_ON(_1ps->pages[c]); - page = ios->r4w->get_page(ios->private, offset, - &uptodate); - if (unlikely(!page)) - return -ENOMEM; - - _1ps->pages[c] = page; - /* Mark read-pages to be cache_released */ - _1ps->page_is_read[c] = true; - if (!uptodate) - _add_to_r4w(ios, &read_si, page, PAGE_SIZE); - } - - offset += PAGE_SIZE; - if (p == (sp2d->pages_in_unit - 1)) { - ++c; - p = 0; - ore_calc_stripe_info(ios->layout, offset, 0, &read_si); - } else { - read_si.obj_offset += PAGE_SIZE; - ++p; - } - } - -read_it: - return 0; -} - -static int _read_4_write_execute(struct ore_io_state *ios) -{ - struct ore_io_state *ios_read; - unsigned i; - int ret; - - ios_read = ios->ios_read_4_write; - if (!ios_read) - return 0; - - /* FIXME: Ugly to signal _sbi_read_mirror that we have bio(s). Change - * to check for per_dev->bio - */ - ios_read->pages = ios->pages; - - /* Now read these devices */ - for (i = 0; i < ios_read->numdevs; i += ios_read->layout->mirrors_p1) { - ret = _ore_read_mirror(ios_read, i); - if (unlikely(ret)) - return ret; - } - - ret = ore_io_execute(ios_read); /* Synchronus execution */ - if (unlikely(ret)) { - ORE_DBGMSG("!! ore_io_execute => %d\n", ret); - return ret; - } - - _mark_read4write_pages_uptodate(ios_read, ret); - ore_put_io_state(ios_read); - ios->ios_read_4_write = NULL; /* Might need a reuse at last stripe */ - return 0; -} - -/* In writes @cur_len means length left. .i.e cur_len==0 is the last parity U */ -int _ore_add_parity_unit(struct ore_io_state *ios, - struct ore_striping_info *si, - struct ore_per_dev_state *per_dev, - unsigned cur_len, bool do_xor) -{ - if (ios->reading) { - if (per_dev->cur_sg >= ios->sgs_per_dev) { - ORE_DBGMSG("cur_sg(%d) >= sgs_per_dev(%d)\n" , - per_dev->cur_sg, ios->sgs_per_dev); - return -ENOMEM; - } - _ore_add_sg_seg(per_dev, cur_len, true); - } else { - struct __stripe_pages_2d *sp2d = ios->sp2d; - struct page **pages = ios->parity_pages + ios->cur_par_page; - unsigned num_pages; - unsigned array_start = 0; - unsigned i; - int ret; - - si->cur_pg = _sp2d_min_pg(sp2d); - num_pages = _sp2d_max_pg(sp2d) + 1 - si->cur_pg; - - if (!per_dev->length) { - per_dev->offset += si->cur_pg * PAGE_SIZE; - /* If first stripe, Read in all read4write pages - * (if needed) before we calculate the first parity. - */ - if (do_xor) - _read_4_write_first_stripe(ios); - } - if (!cur_len && do_xor) - /* If last stripe r4w pages of last stripe */ - _read_4_write_last_stripe(ios); - _read_4_write_execute(ios); - - for (i = 0; i < num_pages; i++) { - pages[i] = _raid_page_alloc(); - if (unlikely(!pages[i])) - return -ENOMEM; - - ++(ios->cur_par_page); - } - - BUG_ON(si->cur_comp < sp2d->data_devs); - BUG_ON(si->cur_pg + num_pages > sp2d->pages_in_unit); - - ret = _ore_add_stripe_unit(ios, &array_start, 0, pages, - per_dev, num_pages * PAGE_SIZE); - if (unlikely(ret)) - return ret; - - if (do_xor) { - _gen_xor_unit(sp2d); - _sp2d_reset(sp2d, ios->r4w, ios->private); - } - } - return 0; -} - -int _ore_post_alloc_raid_stuff(struct ore_io_state *ios) -{ - if (ios->parity_pages) { - struct ore_layout *layout = ios->layout; - unsigned pages_in_unit = layout->stripe_unit / PAGE_SIZE; - - if (_sp2d_alloc(pages_in_unit, layout->group_width, - layout->parity, &ios->sp2d)) { - return -ENOMEM; - } - } - return 0; -} - -void _ore_free_raid_stuff(struct ore_io_state *ios) -{ - if (ios->sp2d) { /* writing and raid */ - unsigned i; - - for (i = 0; i < ios->cur_par_page; i++) { - struct page *page = ios->parity_pages[i]; - - if (page) - _raid_page_free(page); - } - if (ios->extra_part_alloc) - kfree(ios->parity_pages); - /* If IO returned an error pages might need unlocking */ - _sp2d_reset(ios->sp2d, ios->r4w, ios->private); - _sp2d_free(ios->sp2d); - } else { - /* Will only be set if raid reading && sglist is big */ - if (ios->extra_part_alloc) - kfree(ios->per_dev[0].sglist); - } - if (ios->ios_read_4_write) - ore_put_io_state(ios->ios_read_4_write); -} diff --git a/fs/exofs/ore_raid.h b/fs/exofs/ore_raid.h deleted file mode 100644 index a6e746775570..000000000000 --- a/fs/exofs/ore_raid.h +++ /dev/null @@ -1,62 +0,0 @@ -/* - * Copyright (C) from 2011 - * Boaz Harrosh <ooo@electrozaur.com> - * - * This file is part of the objects raid engine (ore). - * - * It is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as published - * by the Free Software Foundation. - * - * You should have received a copy of the GNU General Public License - * along with "ore". If not, write to the Free Software Foundation, Inc: - * "Free Software Foundation <info@fsf.org>" - */ - -#include <scsi/osd_ore.h> - -#define ORE_ERR(fmt, a...) printk(KERN_ERR "ore: " fmt, ##a) - -#ifdef CONFIG_EXOFS_DEBUG -#define ORE_DBGMSG(fmt, a...) \ - printk(KERN_NOTICE "ore @%s:%d: " fmt, __func__, __LINE__, ##a) -#else -#define ORE_DBGMSG(fmt, a...) \ - do { if (0) printk(fmt, ##a); } while (0) -#endif - -/* u64 has problems with printk this will cast it to unsigned long long */ -#define _LLU(x) (unsigned long long)(x) - -#define ORE_DBGMSG2(M...) do {} while (0) -/* #define ORE_DBGMSG2 ORE_DBGMSG */ - -/* ios_raid.c stuff needed by ios.c */ -int _ore_post_alloc_raid_stuff(struct ore_io_state *ios); -void _ore_free_raid_stuff(struct ore_io_state *ios); - -void _ore_add_sg_seg(struct ore_per_dev_state *per_dev, unsigned cur_len, - bool not_last); -int _ore_add_parity_unit(struct ore_io_state *ios, struct ore_striping_info *si, - struct ore_per_dev_state *per_dev, unsigned cur_len, - bool do_xor); -void _ore_add_stripe_page(struct __stripe_pages_2d *sp2d, - struct ore_striping_info *si, struct page *page); -static inline void _add_stripe_page(struct __stripe_pages_2d *sp2d, - struct ore_striping_info *si, struct page *page) -{ - if (!sp2d) /* Inline the fast path */ - return; /* Hay no raid stuff */ - _ore_add_stripe_page(sp2d, si, page); -} - -/* ios.c stuff needed by ios_raid.c */ -int _ore_get_io_state(struct ore_layout *layout, - struct ore_components *oc, unsigned numdevs, - unsigned sgs_per_dev, unsigned num_par_pages, - struct ore_io_state **pios); -int _ore_add_stripe_unit(struct ore_io_state *ios, unsigned *cur_pg, - unsigned pgbase, struct page **pages, - struct ore_per_dev_state *per_dev, int cur_len); -int _ore_read_mirror(struct ore_io_state *ios, unsigned cur_comp); -int ore_io_execute(struct ore_io_state *ios); diff --git a/fs/exofs/super.c b/fs/exofs/super.c deleted file mode 100644 index fc80c7233fa5..000000000000 --- a/fs/exofs/super.c +++ /dev/null @@ -1,1071 +0,0 @@ -/* - * Copyright (C) 2005, 2006 - * Avishay Traeger (avishay@gmail.com) - * Copyright (C) 2008, 2009 - * Boaz Harrosh <ooo@electrozaur.com> - * - * Copyrights for code taken from ext2: - * Copyright (C) 1992, 1993, 1994, 1995 - * Remy Card (card@masi.ibp.fr) - * Laboratoire MASI - Institut Blaise Pascal - * Universite Pierre et Marie Curie (Paris VI) - * from - * linux/fs/minix/inode.c - * Copyright (C) 1991, 1992 Linus Torvalds - * - * This file is part of exofs. - * - * exofs is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation. Since it is based on ext2, and the only - * valid version of GPL for the Linux kernel is version 2, the only valid - * version of GPL for exofs is version 2. - * - * exofs is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with exofs; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include <linux/string.h> -#include <linux/parser.h> -#include <linux/vfs.h> -#include <linux/random.h> -#include <linux/module.h> -#include <linux/exportfs.h> -#include <linux/slab.h> -#include <linux/iversion.h> - -#include "exofs.h" - -#define EXOFS_DBGMSG2(M...) do {} while (0) - -/****************************************************************************** - * MOUNT OPTIONS - *****************************************************************************/ - -/* - * struct to hold what we get from mount options - */ -struct exofs_mountopt { - bool is_osdname; - const char *dev_name; - uint64_t pid; - int timeout; -}; - -/* - * exofs-specific mount-time options. - */ -enum { Opt_name, Opt_pid, Opt_to, Opt_err }; - -/* - * Our mount-time options. These should ideally be 64-bit unsigned, but the - * kernel's parsing functions do not currently support that. 32-bit should be - * sufficient for most applications now. - */ -static match_table_t tokens = { - {Opt_name, "osdname=%s"}, - {Opt_pid, "pid=%u"}, - {Opt_to, "to=%u"}, - {Opt_err, NULL} -}; - -/* - * The main option parsing method. Also makes sure that all of the mandatory - * mount options were set. - */ -static int parse_options(char *options, struct exofs_mountopt *opts) -{ - char *p; - substring_t args[MAX_OPT_ARGS]; - int option; - bool s_pid = false; - - EXOFS_DBGMSG("parse_options %s\n", options); - /* defaults */ - memset(opts, 0, sizeof(*opts)); - opts->timeout = BLK_DEFAULT_SG_TIMEOUT; - - while ((p = strsep(&options, ",")) != NULL) { - int token; - char str[32]; - - if (!*p) - continue; - - token = match_token(p, tokens, args); - switch (token) { - case Opt_name: - kfree(opts->dev_name); - opts->dev_name = match_strdup(&args[0]); - if (unlikely(!opts->dev_name)) { - EXOFS_ERR("Error allocating dev_name"); - return -ENOMEM; - } - opts->is_osdname = true; - break; - case Opt_pid: - if (0 == match_strlcpy(str, &args[0], sizeof(str))) - return -EINVAL; - opts->pid = simple_strtoull(str, NULL, 0); - if (opts->pid < EXOFS_MIN_PID) { - EXOFS_ERR("Partition ID must be >= %u", - EXOFS_MIN_PID); - return -EINVAL; - } - s_pid = true; - break; - case Opt_to: - if (match_int(&args[0], &option)) - return -EINVAL; - if (option <= 0) { - EXOFS_ERR("Timeout must be > 0"); - return -EINVAL; - } - opts->timeout = option * HZ; - break; - } - } - - if (!s_pid) { - EXOFS_ERR("Need to specify the following options:\n"); - EXOFS_ERR(" -o pid=pid_no_to_use\n"); - return -EINVAL; - } - - return 0; -} - -/****************************************************************************** - * INODE CACHE - *****************************************************************************/ - -/* - * Our inode cache. Isn't it pretty? - */ -static struct kmem_cache *exofs_inode_cachep; - -/* - * Allocate an inode in the cache - */ -static struct inode *exofs_alloc_inode(struct super_block *sb) -{ - struct exofs_i_info *oi; - - oi = kmem_cache_alloc(exofs_inode_cachep, GFP_KERNEL); - if (!oi) - return NULL; - - inode_set_iversion(&oi->vfs_inode, 1); - return &oi->vfs_inode; -} - -static void exofs_i_callback(struct rcu_head *head) -{ - struct inode *inode = container_of(head, struct inode, i_rcu); - kmem_cache_free(exofs_inode_cachep, exofs_i(inode)); -} - -/* - * Remove an inode from the cache - */ -static void exofs_destroy_inode(struct inode *inode) -{ - call_rcu(&inode->i_rcu, exofs_i_callback); -} - -/* - * Initialize the inode - */ -static void exofs_init_once(void *foo) -{ - struct exofs_i_info *oi = foo; - - inode_init_once(&oi->vfs_inode); -} - -/* - * Create and initialize the inode cache - */ -static int init_inodecache(void) -{ - exofs_inode_cachep = kmem_cache_create_usercopy("exofs_inode_cache", - sizeof(struct exofs_i_info), 0, - SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD | - SLAB_ACCOUNT, - offsetof(struct exofs_i_info, i_data), - sizeof_field(struct exofs_i_info, i_data), - exofs_init_once); - if (exofs_inode_cachep == NULL) - return -ENOMEM; - return 0; -} - -/* - * Destroy the inode cache - */ -static void destroy_inodecache(void) -{ - /* - * Make sure all delayed rcu free inodes are flushed before we - * destroy cache. - */ - rcu_barrier(); - kmem_cache_destroy(exofs_inode_cachep); -} - -/****************************************************************************** - * Some osd helpers - *****************************************************************************/ -void exofs_make_credential(u8 cred_a[OSD_CAP_LEN], const struct osd_obj_id *obj) -{ - osd_sec_init_nosec_doall_caps(cred_a, obj, false, true); -} - -static int exofs_read_kern(struct osd_dev *od, u8 *cred, struct osd_obj_id *obj, - u64 offset, void *p, unsigned length) -{ - struct osd_request *or = osd_start_request(od); -/* struct osd_sense_info osi = {.key = 0};*/ - int ret; - - if (unlikely(!or)) { - EXOFS_DBGMSG("%s: osd_start_request failed.\n", __func__); - return -ENOMEM; - } - ret = osd_req_read_kern(or, obj, offset, p, length); - if (unlikely(ret)) { - EXOFS_DBGMSG("%s: osd_req_read_kern failed.\n", __func__); - goto out; - } - - ret = osd_finalize_request(or, 0, cred, NULL); - if (unlikely(ret)) { - EXOFS_DBGMSG("Failed to osd_finalize_request() => %d\n", ret); - goto out; - } - - ret = osd_execute_request(or); - if (unlikely(ret)) - EXOFS_DBGMSG("osd_execute_request() => %d\n", ret); - /* osd_req_decode_sense(or, ret); */ - -out: - osd_end_request(or); - EXOFS_DBGMSG2("read_kern(0x%llx) offset=0x%llx " - "length=0x%llx dev=%p ret=>%d\n", - _LLU(obj->id), _LLU(offset), _LLU(length), od, ret); - return ret; -} - -static const struct osd_attr g_attr_sb_stats = ATTR_DEF( - EXOFS_APAGE_SB_DATA, - EXOFS_ATTR_SB_STATS, - sizeof(struct exofs_sb_stats)); - -static int __sbi_read_stats(struct exofs_sb_info *sbi) -{ - struct osd_attr attrs[] = { - [0] = g_attr_sb_stats, - }; - struct ore_io_state *ios; - int ret; - - ret = ore_get_io_state(&sbi->layout, &sbi->oc, &ios); - if (unlikely(ret)) { - EXOFS_ERR("%s: ore_get_io_state failed.\n", __func__); - return ret; - } - - ios->in_attr = attrs; - ios->in_attr_len = ARRAY_SIZE(attrs); - - ret = ore_read(ios); - if (unlikely(ret)) { - EXOFS_ERR("Error reading super_block stats => %d\n", ret); - goto out; - } - - ret = extract_attr_from_ios(ios, &attrs[0]); - if (ret) { - EXOFS_ERR("%s: extract_attr of sb_stats failed\n", __func__); - goto out; - } - if (attrs[0].len) { - struct exofs_sb_stats *ess; - - if (unlikely(attrs[0].len != sizeof(*ess))) { - EXOFS_ERR("%s: Wrong version of exofs_sb_stats " - "size(%d) != expected(%zd)\n", - __func__, attrs[0].len, sizeof(*ess)); - goto out; - } - - ess = attrs[0].val_ptr; - sbi->s_nextid = le64_to_cpu(ess->s_nextid); - sbi->s_numfiles = le32_to_cpu(ess->s_numfiles); - } - -out: - ore_put_io_state(ios); - return ret; -} - -static void stats_done(struct ore_io_state *ios, void *p) -{ - ore_put_io_state(ios); - /* Good thanks nothing to do anymore */ -} - -/* Asynchronously write the stats attribute */ -int exofs_sbi_write_stats(struct exofs_sb_info *sbi) -{ - struct osd_attr attrs[] = { - [0] = g_attr_sb_stats, - }; - struct ore_io_state *ios; - int ret; - - ret = ore_get_io_state(&sbi->layout, &sbi->oc, &ios); - if (unlikely(ret)) { - EXOFS_ERR("%s: ore_get_io_state failed.\n", __func__); - return ret; - } - - sbi->s_ess.s_nextid = cpu_to_le64(sbi->s_nextid); - sbi->s_ess.s_numfiles = cpu_to_le64(sbi->s_numfiles); - attrs[0].val_ptr = &sbi->s_ess; - - - ios->done = stats_done; - ios->private = sbi; - ios->out_attr = attrs; - ios->out_attr_len = ARRAY_SIZE(attrs); - - ret = ore_write(ios); - if (unlikely(ret)) { - EXOFS_ERR("%s: ore_write failed.\n", __func__); - ore_put_io_state(ios); - } - - return ret; -} - -/****************************************************************************** - * SUPERBLOCK FUNCTIONS - *****************************************************************************/ -static const struct super_operations exofs_sops; -static const struct export_operations exofs_export_ops; - -/* - * Write the superblock to the OSD - */ -static int exofs_sync_fs(struct super_block *sb, int wait) -{ - struct exofs_sb_info *sbi; - struct exofs_fscb *fscb; - struct ore_comp one_comp; - struct ore_components oc; - struct ore_io_state *ios; - int ret = -ENOMEM; - - fscb = kmalloc(sizeof(*fscb), GFP_KERNEL); - if (unlikely(!fscb)) - return -ENOMEM; - - sbi = sb->s_fs_info; - - /* NOTE: We no longer dirty the super_block anywhere in exofs. The - * reason we write the fscb here on unmount is so we can stay backwards - * compatible with fscb->s_version == 1. (What we are not compatible - * with is if a new version FS crashed and then we try to mount an old - * version). Otherwise the exofs_fscb is read-only from mkfs time. All - * the writeable info is set in exofs_sbi_write_stats() above. - */ - - exofs_init_comps(&oc, &one_comp, sbi, EXOFS_SUPER_ID); - - ret = ore_get_io_state(&sbi->layout, &oc, &ios); - if (unlikely(ret)) - goto out; - - ios->length = offsetof(struct exofs_fscb, s_dev_table_oid); - memset(fscb, 0, ios->length); - fscb->s_nextid = cpu_to_le64(sbi->s_nextid); - fscb->s_numfiles = cpu_to_le64(sbi->s_numfiles); - fscb->s_magic = cpu_to_le16(sb->s_magic); - fscb->s_newfs = 0; - fscb->s_version = EXOFS_FSCB_VER; - - ios->offset = 0; - ios->kern_buff = fscb; - - ret = ore_write(ios); - if (unlikely(ret)) - EXOFS_ERR("%s: ore_write failed.\n", __func__); - -out: - EXOFS_DBGMSG("s_nextid=0x%llx ret=%d\n", _LLU(sbi->s_nextid), ret); - ore_put_io_state(ios); - kfree(fscb); - return ret; -} - -static void _exofs_print_device(const char *msg, const char *dev_path, - struct osd_dev *od, u64 pid) -{ - const struct osd_dev_info *odi = osduld_device_info(od); - - printk(KERN_NOTICE "exofs: %s %s osd_name-%s pid-0x%llx\n", - msg, dev_path ?: "", odi->osdname, _LLU(pid)); -} - -static void exofs_free_sbi(struct exofs_sb_info *sbi) -{ - unsigned numdevs = sbi->oc.numdevs; - - while (numdevs) { - unsigned i = --numdevs; - struct osd_dev *od = ore_comp_dev(&sbi->oc, i); - - if (od) { - ore_comp_set_dev(&sbi->oc, i, NULL); - osduld_put_device(od); - } - } - kfree(sbi->oc.ods); - kfree(sbi); -} - -/* - * This function is called when the vfs is freeing the superblock. We just - * need to free our own part. - */ -static void exofs_put_super(struct super_block *sb) -{ - int num_pend; - struct exofs_sb_info *sbi = sb->s_fs_info; - - /* make sure there are no pending commands */ - for (num_pend = atomic_read(&sbi->s_curr_pending); num_pend > 0; - num_pend = atomic_read(&sbi->s_curr_pending)) { - wait_queue_head_t wq; - - printk(KERN_NOTICE "%s: !!Pending operations in flight. " - "This is a BUG. please report to osd-dev@open-osd.org\n", - __func__); - init_waitqueue_head(&wq); - wait_event_timeout(wq, - (atomic_read(&sbi->s_curr_pending) == 0), - msecs_to_jiffies(100)); - } - - _exofs_print_device("Unmounting", NULL, ore_comp_dev(&sbi->oc, 0), - sbi->one_comp.obj.partition); - - exofs_sysfs_sb_del(sbi); - exofs_free_sbi(sbi); - sb->s_fs_info = NULL; -} - -static int _read_and_match_data_map(struct exofs_sb_info *sbi, unsigned numdevs, - struct exofs_device_table *dt) -{ - int ret; - - sbi->layout.stripe_unit = - le64_to_cpu(dt->dt_data_map.cb_stripe_unit); - sbi->layout.group_width = - le32_to_cpu(dt->dt_data_map.cb_group_width); - sbi->layout.group_depth = - le32_to_cpu(dt->dt_data_map.cb_group_depth); - sbi->layout.mirrors_p1 = - le32_to_cpu(dt->dt_data_map.cb_mirror_cnt) + 1; - sbi->layout.raid_algorithm = - le32_to_cpu(dt->dt_data_map.cb_raid_algorithm); - - ret = ore_verify_layout(numdevs, &sbi->layout); - - EXOFS_DBGMSG("exofs: layout: " - "num_comps=%u stripe_unit=0x%x group_width=%u " - "group_depth=0x%llx mirrors_p1=%u raid_algorithm=%u\n", - numdevs, - sbi->layout.stripe_unit, - sbi->layout.group_width, - _LLU(sbi->layout.group_depth), - sbi->layout.mirrors_p1, - sbi->layout.raid_algorithm); - return ret; -} - -static unsigned __ra_pages(struct ore_layout *layout) -{ - const unsigned _MIN_RA = 32; /* min 128K read-ahead */ - unsigned ra_pages = layout->group_width * layout->stripe_unit / - PAGE_SIZE; - unsigned max_io_pages = exofs_max_io_pages(layout, ~0); - - ra_pages *= 2; /* two stripes */ - if (ra_pages < _MIN_RA) - ra_pages = roundup(_MIN_RA, ra_pages / 2); - - if (ra_pages > max_io_pages) - ra_pages = max_io_pages; - - return ra_pages; -} - -/* @odi is valid only as long as @fscb_dev is valid */ -static int exofs_devs_2_odi(struct exofs_dt_device_info *dt_dev, - struct osd_dev_info *odi) -{ - odi->systemid_len = le32_to_cpu(dt_dev->systemid_len); - if (likely(odi->systemid_len)) - memcpy(odi->systemid, dt_dev->systemid, OSD_SYSTEMID_LEN); - - odi->osdname_len = le32_to_cpu(dt_dev->osdname_len); - odi->osdname = dt_dev->osdname; - - /* FIXME support long names. Will need a _put function */ - if (dt_dev->long_name_offset) - return -EINVAL; - - /* Make sure osdname is printable! - * mkexofs should give us space for a null-terminator else the - * device-table is invalid. - */ - if (unlikely(odi->osdname_len >= sizeof(dt_dev->osdname))) - odi->osdname_len = sizeof(dt_dev->osdname) - 1; - dt_dev->osdname[odi->osdname_len] = 0; - - /* If it's all zeros something is bad we read past end-of-obj */ - return !(odi->systemid_len || odi->osdname_len); -} - -static int __alloc_dev_table(struct exofs_sb_info *sbi, unsigned numdevs, - struct exofs_dev **peds) -{ - /* Twice bigger table: See exofs_init_comps() and comment at - * exofs_read_lookup_dev_table() - */ - const size_t numores = numdevs * 2 - 1; - struct exofs_dev *eds; - unsigned i; - - sbi->oc.ods = kzalloc(numores * sizeof(struct ore_dev *) + - numdevs * sizeof(struct exofs_dev), GFP_KERNEL); - if (unlikely(!sbi->oc.ods)) { - EXOFS_ERR("ERROR: failed allocating Device array[%d]\n", - numdevs); - return -ENOMEM; - } - - /* Start of allocated struct exofs_dev entries */ - *peds = eds = (void *)sbi->oc.ods[numores]; - /* Initialize pointers into struct exofs_dev */ - for (i = 0; i < numdevs; ++i) - sbi->oc.ods[i] = &eds[i].ored; - return 0; -} - -static int exofs_read_lookup_dev_table(struct exofs_sb_info *sbi, - struct osd_dev *fscb_od, - unsigned table_count) -{ - struct ore_comp comp; - struct exofs_device_table *dt; - struct exofs_dev *eds; - unsigned table_bytes = table_count * sizeof(dt->dt_dev_table[0]) + - sizeof(*dt); - unsigned numdevs, i; - int ret; - - dt = kmalloc(table_bytes, GFP_KERNEL); - if (unlikely(!dt)) { - EXOFS_ERR("ERROR: allocating %x bytes for device table\n", - table_bytes); - return -ENOMEM; - } - - sbi->oc.numdevs = 0; - - comp.obj.partition = sbi->one_comp.obj.partition; - comp.obj.id = EXOFS_DEVTABLE_ID; - exofs_make_credential(comp.cred, &comp.obj); - - ret = exofs_read_kern(fscb_od, comp.cred, &comp.obj, 0, dt, - table_bytes); - if (unlikely(ret)) { - EXOFS_ERR("ERROR: reading device table\n"); - goto out; - } - - numdevs = le64_to_cpu(dt->dt_num_devices); - if (unlikely(!numdevs)) { - ret = -EINVAL; - goto out; - } - WARN_ON(table_count != numdevs); - - ret = _read_and_match_data_map(sbi, numdevs, dt); - if (unlikely(ret)) - goto out; - - ret = __alloc_dev_table(sbi, numdevs, &eds); - if (unlikely(ret)) - goto out; - /* exofs round-robins the device table view according to inode - * number. We hold a: twice bigger table hence inodes can point - * to any device and have a sequential view of the table - * starting at this device. See exofs_init_comps() - */ - memcpy(&sbi->oc.ods[numdevs], &sbi->oc.ods[0], - (numdevs - 1) * sizeof(sbi->oc.ods[0])); - - /* create sysfs subdir under which we put the device table - * And cluster layout. A Superblock is identified by the string: - * "dev[0].osdname"_"pid" - */ - exofs_sysfs_sb_add(sbi, &dt->dt_dev_table[0]); - - for (i = 0; i < numdevs; i++) { - struct exofs_fscb fscb; - struct osd_dev_info odi; - struct osd_dev *od; - - if (exofs_devs_2_odi(&dt->dt_dev_table[i], &odi)) { - EXOFS_ERR("ERROR: Read all-zeros device entry\n"); - ret = -EINVAL; - goto out; - } - - printk(KERN_NOTICE "Add device[%d]: osd_name-%s\n", - i, odi.osdname); - - /* the exofs id is currently the table index */ - eds[i].did = i; - - /* On all devices the device table is identical. The user can - * specify any one of the participating devices on the command - * line. We always keep them in device-table order. - */ - if (fscb_od && osduld_device_same(fscb_od, &odi)) { - eds[i].ored.od = fscb_od; - ++sbi->oc.numdevs; - fscb_od = NULL; - exofs_sysfs_odev_add(&eds[i], sbi); - continue; - } - - od = osduld_info_lookup(&odi); - if (IS_ERR(od)) { - ret = PTR_ERR(od); - EXOFS_ERR("ERROR: device requested is not found " - "osd_name-%s =>%d\n", odi.osdname, ret); - goto out; - } - - eds[i].ored.od = od; - ++sbi->oc.numdevs; - - /* Read the fscb of the other devices to make sure the FS - * partition is there. - */ - ret = exofs_read_kern(od, comp.cred, &comp.obj, 0, &fscb, - sizeof(fscb)); - if (unlikely(ret)) { - EXOFS_ERR("ERROR: Malformed participating device " - "error reading fscb osd_name-%s\n", - odi.osdname); - goto out; - } - exofs_sysfs_odev_add(&eds[i], sbi); - - /* TODO: verify other information is correct and FS-uuid - * matches. Benny what did you say about device table - * generation and old devices? - */ - } - -out: - kfree(dt); - if (unlikely(fscb_od && !ret)) { - EXOFS_ERR("ERROR: Bad device-table container device not present\n"); - osduld_put_device(fscb_od); - return -EINVAL; - } - return ret; -} - -/* - * Read the superblock from the OSD and fill in the fields - */ -static int exofs_fill_super(struct super_block *sb, - struct exofs_mountopt *opts, - struct exofs_sb_info *sbi, - int silent) -{ - struct inode *root; - struct osd_dev *od; /* Master device */ - struct exofs_fscb fscb; /*on-disk superblock info */ - struct ore_comp comp; - unsigned table_count; - int ret; - - /* use mount options to fill superblock */ - if (opts->is_osdname) { - struct osd_dev_info odi = {.systemid_len = 0}; - - odi.osdname_len = strlen(opts->dev_name); - odi.osdname = (u8 *)opts->dev_name; - od = osduld_info_lookup(&odi); - kfree(opts->dev_name); - opts->dev_name = NULL; - } else { - od = osduld_path_lookup(opts->dev_name); - } - if (IS_ERR(od)) { - ret = -EINVAL; - goto free_sbi; - } - - /* Default layout in case we do not have a device-table */ - sbi->layout.stripe_unit = PAGE_SIZE; - sbi->layout.mirrors_p1 = 1; - sbi->layout.group_width = 1; - sbi->layout.group_depth = -1; - sbi->layout.group_count = 1; - sbi->s_timeout = opts->timeout; - - sbi->one_comp.obj.partition = opts->pid; - sbi->one_comp.obj.id = 0; - exofs_make_credential(sbi->one_comp.cred, &sbi->one_comp.obj); - sbi->oc.single_comp = EC_SINGLE_COMP; - sbi->oc.comps = &sbi->one_comp; - - /* fill in some other data by hand */ - memset(sb->s_id, 0, sizeof(sb->s_id)); - strcpy(sb->s_id, "exofs"); - sb->s_blocksize = EXOFS_BLKSIZE; - sb->s_blocksize_bits = EXOFS_BLKSHIFT; - sb->s_maxbytes = MAX_LFS_FILESIZE; - sb->s_max_links = EXOFS_LINK_MAX; - atomic_set(&sbi->s_curr_pending, 0); - sb->s_bdev = NULL; - sb->s_dev = 0; - - comp.obj.partition = sbi->one_comp.obj.partition; - comp.obj.id = EXOFS_SUPER_ID; - exofs_make_credential(comp.cred, &comp.obj); - - ret = exofs_read_kern(od, comp.cred, &comp.obj, 0, &fscb, sizeof(fscb)); - if (unlikely(ret)) - goto free_sbi; - - sb->s_magic = le16_to_cpu(fscb.s_magic); - /* NOTE: we read below to be backward compatible with old versions */ - sbi->s_nextid = le64_to_cpu(fscb.s_nextid); - sbi->s_numfiles = le32_to_cpu(fscb.s_numfiles); - - /* make sure what we read from the object store is correct */ - if (sb->s_magic != EXOFS_SUPER_MAGIC) { - if (!silent) - EXOFS_ERR("ERROR: Bad magic value\n"); - ret = -EINVAL; - goto free_sbi; - } - if (le32_to_cpu(fscb.s_version) > EXOFS_FSCB_VER) { - EXOFS_ERR("ERROR: Bad FSCB version expected-%d got-%d\n", - EXOFS_FSCB_VER, le32_to_cpu(fscb.s_version)); - ret = -EINVAL; - goto free_sbi; - } - - /* start generation numbers from a random point */ - get_random_bytes(&sbi->s_next_generation, sizeof(u32)); - spin_lock_init(&sbi->s_next_gen_lock); - - table_count = le64_to_cpu(fscb.s_dev_table_count); - if (table_count) { - ret = exofs_read_lookup_dev_table(sbi, od, table_count); - if (unlikely(ret)) - goto free_sbi; - } else { - struct exofs_dev *eds; - - ret = __alloc_dev_table(sbi, 1, &eds); - if (unlikely(ret)) - goto free_sbi; - - ore_comp_set_dev(&sbi->oc, 0, od); - sbi->oc.numdevs = 1; - } - - __sbi_read_stats(sbi); - - /* set up operation vectors */ - ret = super_setup_bdi(sb); - if (ret) { - EXOFS_DBGMSG("Failed to super_setup_bdi\n"); - goto free_sbi; - } - sb->s_bdi->ra_pages = __ra_pages(&sbi->layout); - sb->s_fs_info = sbi; - sb->s_op = &exofs_sops; - sb->s_export_op = &exofs_export_ops; - root = exofs_iget(sb, EXOFS_ROOT_ID - EXOFS_OBJ_OFF); - if (IS_ERR(root)) { - EXOFS_ERR("ERROR: exofs_iget failed\n"); - ret = PTR_ERR(root); - goto free_sbi; - } - sb->s_root = d_make_root(root); - if (!sb->s_root) { - EXOFS_ERR("ERROR: get root inode failed\n"); - ret = -ENOMEM; - goto free_sbi; - } - - if (!S_ISDIR(root->i_mode)) { - dput(sb->s_root); - sb->s_root = NULL; - EXOFS_ERR("ERROR: corrupt root inode (mode = %hd)\n", - root->i_mode); - ret = -EINVAL; - goto free_sbi; - } - - exofs_sysfs_dbg_print(); - _exofs_print_device("Mounting", opts->dev_name, - ore_comp_dev(&sbi->oc, 0), - sbi->one_comp.obj.partition); - return 0; - -free_sbi: - EXOFS_ERR("Unable to mount exofs on %s pid=0x%llx err=%d\n", - opts->dev_name, sbi->one_comp.obj.partition, ret); - exofs_free_sbi(sbi); - return ret; -} - -/* - * Set up the superblock (calls exofs_fill_super eventually) - */ -static struct dentry *exofs_mount(struct file_system_type *type, - int flags, const char *dev_name, - void *data) -{ - struct super_block *s; - struct exofs_mountopt opts; - struct exofs_sb_info *sbi; - int ret; - - ret = parse_options(data, &opts); - if (ret) { - kfree(opts.dev_name); - return ERR_PTR(ret); - } - - sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); - if (!sbi) { - kfree(opts.dev_name); - return ERR_PTR(-ENOMEM); - } - - s = sget(type, NULL, set_anon_super, flags, NULL); - - if (IS_ERR(s)) { - kfree(opts.dev_name); - kfree(sbi); - return ERR_CAST(s); - } - - if (!opts.dev_name) - opts.dev_name = dev_name; - - - ret = exofs_fill_super(s, &opts, sbi, flags & SB_SILENT ? 1 : 0); - if (ret) { - deactivate_locked_super(s); - return ERR_PTR(ret); - } - s->s_flags |= SB_ACTIVE; - return dget(s->s_root); -} - -/* - * Return information about the file system state in the buffer. This is used - * by the 'df' command, for example. - */ -static int exofs_statfs(struct dentry *dentry, struct kstatfs *buf) -{ - struct super_block *sb = dentry->d_sb; - struct exofs_sb_info *sbi = sb->s_fs_info; - struct ore_io_state *ios; - struct osd_attr attrs[] = { - ATTR_DEF(OSD_APAGE_PARTITION_QUOTAS, - OSD_ATTR_PQ_CAPACITY_QUOTA, sizeof(__be64)), - ATTR_DEF(OSD_APAGE_PARTITION_INFORMATION, - OSD_ATTR_PI_USED_CAPACITY, sizeof(__be64)), - }; - uint64_t capacity = ULLONG_MAX; - uint64_t used = ULLONG_MAX; - int ret; - - ret = ore_get_io_state(&sbi->layout, &sbi->oc, &ios); - if (ret) { - EXOFS_DBGMSG("ore_get_io_state failed.\n"); - return ret; - } - - ios->in_attr = attrs; - ios->in_attr_len = ARRAY_SIZE(attrs); - - ret = ore_read(ios); - if (unlikely(ret)) - goto out; - - ret = extract_attr_from_ios(ios, &attrs[0]); - if (likely(!ret)) { - capacity = get_unaligned_be64(attrs[0].val_ptr); - if (unlikely(!capacity)) - capacity = ULLONG_MAX; - } else - EXOFS_DBGMSG("exofs_statfs: get capacity failed.\n"); - - ret = extract_attr_from_ios(ios, &attrs[1]); - if (likely(!ret)) - used = get_unaligned_be64(attrs[1].val_ptr); - else - EXOFS_DBGMSG("exofs_statfs: get used-space failed.\n"); - - /* fill in the stats buffer */ - buf->f_type = EXOFS_SUPER_MAGIC; - buf->f_bsize = EXOFS_BLKSIZE; - buf->f_blocks = capacity >> 9; - buf->f_bfree = (capacity - used) >> 9; - buf->f_bavail = buf->f_bfree; - buf->f_files = sbi->s_numfiles; - buf->f_ffree = EXOFS_MAX_ID - sbi->s_numfiles; - buf->f_namelen = EXOFS_NAME_LEN; - -out: - ore_put_io_state(ios); - return ret; -} - -static const struct super_operations exofs_sops = { - .alloc_inode = exofs_alloc_inode, - .destroy_inode = exofs_destroy_inode, - .write_inode = exofs_write_inode, - .evict_inode = exofs_evict_inode, - .put_super = exofs_put_super, - .sync_fs = exofs_sync_fs, - .statfs = exofs_statfs, -}; - -/****************************************************************************** - * EXPORT OPERATIONS - *****************************************************************************/ - -static struct dentry *exofs_get_parent(struct dentry *child) -{ - unsigned long ino = exofs_parent_ino(child); - - if (!ino) - return ERR_PTR(-ESTALE); - - return d_obtain_alias(exofs_iget(child->d_sb, ino)); -} - -static struct inode *exofs_nfs_get_inode(struct super_block *sb, - u64 ino, u32 generation) -{ - struct inode *inode; - - inode = exofs_iget(sb, ino); - if (IS_ERR(inode)) - return ERR_CAST(inode); - if (generation && inode->i_generation != generation) { - /* we didn't find the right inode.. */ - iput(inode); - return ERR_PTR(-ESTALE); - } - return inode; -} - -static struct dentry *exofs_fh_to_dentry(struct super_block *sb, - struct fid *fid, int fh_len, int fh_type) -{ - return generic_fh_to_dentry(sb, fid, fh_len, fh_type, - exofs_nfs_get_inode); -} - -static struct dentry *exofs_fh_to_parent(struct super_block *sb, - struct fid *fid, int fh_len, int fh_type) -{ - return generic_fh_to_parent(sb, fid, fh_len, fh_type, - exofs_nfs_get_inode); -} - -static const struct export_operations exofs_export_ops = { - .fh_to_dentry = exofs_fh_to_dentry, - .fh_to_parent = exofs_fh_to_parent, - .get_parent = exofs_get_parent, -}; - -/****************************************************************************** - * INSMOD/RMMOD - *****************************************************************************/ - -/* - * struct that describes this file system - */ -static struct file_system_type exofs_type = { - .owner = THIS_MODULE, - .name = "exofs", - .mount = exofs_mount, - .kill_sb = generic_shutdown_super, -}; -MODULE_ALIAS_FS("exofs"); - -static int __init init_exofs(void) -{ - int err; - - err = init_inodecache(); - if (err) - goto out; - - err = register_filesystem(&exofs_type); - if (err) - goto out_d; - - /* We don't fail if sysfs creation failed */ - exofs_sysfs_init(); - - return 0; -out_d: - destroy_inodecache(); -out: - return err; -} - -static void __exit exit_exofs(void) -{ - exofs_sysfs_uninit(); - unregister_filesystem(&exofs_type); - destroy_inodecache(); -} - -MODULE_AUTHOR("Avishay Traeger <avishay@gmail.com>"); -MODULE_DESCRIPTION("exofs"); -MODULE_LICENSE("GPL"); - -module_init(init_exofs) -module_exit(exit_exofs) diff --git a/fs/exofs/sys.c b/fs/exofs/sys.c deleted file mode 100644 index 1f7d5e46cdda..000000000000 --- a/fs/exofs/sys.c +++ /dev/null @@ -1,205 +0,0 @@ -/* - * Copyright (C) 2012 - * Sachin Bhamare <sbhamare@panasas.com> - * Boaz Harrosh <ooo@electrozaur.com> - * - * This file is part of exofs. - * - * exofs is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License 2 as published by - * the Free Software Foundation. - * - * exofs is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with exofs; if not, write to the: - * Free Software Foundation <licensing@fsf.org> - */ - -#include <linux/kobject.h> -#include <linux/device.h> - -#include "exofs.h" - -struct odev_attr { - struct attribute attr; - ssize_t (*show)(struct exofs_dev *, char *); - ssize_t (*store)(struct exofs_dev *, const char *, size_t); -}; - -static ssize_t odev_attr_show(struct kobject *kobj, struct attribute *attr, - char *buf) -{ - struct exofs_dev *edp = container_of(kobj, struct exofs_dev, ed_kobj); - struct odev_attr *a = container_of(attr, struct odev_attr, attr); - - return a->show ? a->show(edp, buf) : 0; -} - -static ssize_t odev_attr_store(struct kobject *kobj, struct attribute *attr, - const char *buf, size_t len) -{ - struct exofs_dev *edp = container_of(kobj, struct exofs_dev, ed_kobj); - struct odev_attr *a = container_of(attr, struct odev_attr, attr); - - return a->store ? a->store(edp, buf, len) : len; -} - -static const struct sysfs_ops odev_attr_ops = { - .show = odev_attr_show, - .store = odev_attr_store, -}; - - -static struct kset *exofs_kset; - -static ssize_t osdname_show(struct exofs_dev *edp, char *buf) -{ - struct osd_dev *odev = edp->ored.od; - const struct osd_dev_info *odi = osduld_device_info(odev); - - return snprintf(buf, odi->osdname_len + 1, "%s", odi->osdname); -} - -static ssize_t systemid_show(struct exofs_dev *edp, char *buf) -{ - struct osd_dev *odev = edp->ored.od; - const struct osd_dev_info *odi = osduld_device_info(odev); - - memcpy(buf, odi->systemid, odi->systemid_len); - return odi->systemid_len; -} - -static ssize_t uri_show(struct exofs_dev *edp, char *buf) -{ - return snprintf(buf, edp->urilen, "%s", edp->uri); -} - -static ssize_t uri_store(struct exofs_dev *edp, const char *buf, size_t len) -{ - uint8_t *new_uri; - - edp->urilen = strlen(buf) + 1; - new_uri = krealloc(edp->uri, edp->urilen, GFP_KERNEL); - if (new_uri == NULL) - return -ENOMEM; - edp->uri = new_uri; - strncpy(edp->uri, buf, edp->urilen); - return edp->urilen; -} - -#define OSD_ATTR(name, mode, show, store) \ - static struct odev_attr odev_attr_##name = \ - __ATTR(name, mode, show, store) - -OSD_ATTR(osdname, S_IRUGO, osdname_show, NULL); -OSD_ATTR(systemid, S_IRUGO, systemid_show, NULL); -OSD_ATTR(uri, S_IRWXU, uri_show, uri_store); - -static struct attribute *odev_attrs[] = { - &odev_attr_osdname.attr, - &odev_attr_systemid.attr, - &odev_attr_uri.attr, - NULL, -}; - -static struct kobj_type odev_ktype = { - .default_attrs = odev_attrs, - .sysfs_ops = &odev_attr_ops, -}; - -static struct kobj_type uuid_ktype = { -}; - -void exofs_sysfs_dbg_print(void) -{ -#ifdef CONFIG_EXOFS_DEBUG - struct kobject *k_name, *k_tmp; - - list_for_each_entry_safe(k_name, k_tmp, &exofs_kset->list, entry) { - printk(KERN_INFO "%s: name %s ref %d\n", - __func__, kobject_name(k_name), - (int)kref_read(&k_name->kref)); - } -#endif -} -/* - * This function removes all kobjects under exofs_kset - * At the end of it, exofs_kset kobject will have a refcount - * of 1 which gets decremented only on exofs module unload - */ -void exofs_sysfs_sb_del(struct exofs_sb_info *sbi) -{ - struct kobject *k_name, *k_tmp; - struct kobject *s_kobj = &sbi->s_kobj; - - list_for_each_entry_safe(k_name, k_tmp, &exofs_kset->list, entry) { - /* Remove all that are children of this SBI */ - if (k_name->parent == s_kobj) - kobject_put(k_name); - } - kobject_put(s_kobj); -} - -/* - * This function creates sysfs entries to hold the current exofs cluster - * instance (uniquely identified by osdname,pid tuple). - * This function gets called once per exofs mount instance. - */ -int exofs_sysfs_sb_add(struct exofs_sb_info *sbi, - struct exofs_dt_device_info *dt_dev) -{ - struct kobject *s_kobj; - int retval = 0; - uint64_t pid = sbi->one_comp.obj.partition; - - /* allocate new uuid dirent */ - s_kobj = &sbi->s_kobj; - s_kobj->kset = exofs_kset; - retval = kobject_init_and_add(s_kobj, &uuid_ktype, - &exofs_kset->kobj, "%s_%llx", dt_dev->osdname, pid); - if (retval) { - EXOFS_ERR("ERROR: Failed to create sysfs entry for " - "uuid-%s_%llx => %d\n", dt_dev->osdname, pid, retval); - return -ENOMEM; - } - return 0; -} - -int exofs_sysfs_odev_add(struct exofs_dev *edev, struct exofs_sb_info *sbi) -{ - struct kobject *d_kobj; - int retval = 0; - - /* create osd device group which contains following attributes - * osdname, systemid & uri - */ - d_kobj = &edev->ed_kobj; - d_kobj->kset = exofs_kset; - retval = kobject_init_and_add(d_kobj, &odev_ktype, - &sbi->s_kobj, "dev%u", edev->did); - if (retval) { - EXOFS_ERR("ERROR: Failed to create sysfs entry for " - "device dev%u\n", edev->did); - return retval; - } - return 0; -} - -int exofs_sysfs_init(void) -{ - exofs_kset = kset_create_and_add("exofs", NULL, fs_kobj); - if (!exofs_kset) { - EXOFS_ERR("ERROR: kset_create_and_add exofs failed\n"); - return -ENOMEM; - } - return 0; -} - -void exofs_sysfs_uninit(void) -{ - kset_unregister(exofs_kset); -} |