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path: root/fs/cifs/cifs_debug.c
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2019-05-30treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156Thomas Gleixner
Based on 1 normalized pattern(s): this program 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 either version 2 of the license or at your option any later version this program 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 this program if not write to the free software foundation inc 59 temple place suite 330 boston ma 02111 1307 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1334 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-09smb3: display session id in debug dataSteve French
Displaying the session id in /proc/fs/cifs/DebugData is needed in order to correlate Linux client information with network and server traces for many common support scenarios. Turned out to be very important for debugging. Signed-off-by: Steve French <stfrench@microsoft.com> CC: Stable <stable@vger.kernel.org> Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
2019-05-07Negotiate and save preferred compression algorithmsSteve French
New negotiate context (3) allows the server and client to negotiate which compression algorithms to use. Add support for this and save it off in the server structure. Also now displayed in /proc/fs/cifs/DebugData (see below example to Windows 10) where compression algoirthm "LZ77" was negotiated: Servers: Number of credits: 326 Dialect 0x311 COMPRESS_LZ77 signed 1) Name: 192.168.92.17 Uses: 1 Capability: 0x300067 Session Status: 1 TCP status: 1 Instance: 1 See MS-XCA and MS-SMB2 2.2.3.1 for more details. Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
2019-05-07cifs: smbd: Don't destroy transport on RDMA disconnectLong Li
Now upper layer is handling the transport shutdown and reconnect, remove the code that handling transport shutdown on RDMA disconnect. Signed-off-by: Long Li <longli@microsoft.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2019-05-07SMB3: Track total time spent on roundtrips for each SMB3 commandSteve French
Also track minimum and maximum time by command in /proc/fs/cifs/Stats Signed-off-by: Steve French <stfrench@microsoft.com>
2019-03-14smb3: display volume serial number for shares in /proc/fs/cifs/DebugDataSteve French
It can be helpful for debugging. According to MS-FSCC: "A 32-bit unsigned integer that contains the serial number of the volume. The serial number is an opaque value generated by the file system at format time" Signed-off-by: Steve French <stfrench@microsoft.com> Acked-by: Pavel Shilovsky <pshilov@microsoft.com>
2019-03-14smb3: display security information in /proc/fs/cifs/DebugData more accuratelySteve French
When the server required encryption (but we didn't connect to it with the "seal" mount option) we weren't displaying in /proc/fs/cifs/DebugData that the tcon for that share was encrypted. Similarly we were not displaying that signing was required when ses->sign was enabled (we only checked ses->server->sign). This makes it easier to debug when in fact the connection is signed (or sealed), whether for performance or security questions. Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
2019-01-24cifs: print CIFSMaxBufSize as part of /proc/fs/cifs/DebugDataRonnie Sahlberg
Was helpful in debug for some recent problems. Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2018-12-28cifs: Add DFS cache routinesPaulo Alcantara
* Add new dfs_cache.[ch] files * Add new /proc/fs/cifs/dfscache file - dump current cache when read - clear current cache when writing "0" to it * Add delayed_work to periodically refresh cache entries The new interface will be used for caching DFS referrals, as well as supporting client target failover. The DFS cache is a hashtable that maps UNC paths to cache entries. A cache entry contains: - the UNC path it is mapped on - how much the the UNC path the entry consumes - flags - a Time-To-Live after which the entry expires - a list of possible targets (linked lists of UNC paths) - a "hint target" pointing the last known working target or the first target if none were tried. This hint lets cifs.ko remember and try working targets first. * Looking for an entry in the cache is done with dfs_cache_find() - if no valid entries are found, a DFS query is made, stored in the cache and returned - the full target list can be copied and returned to avoid race conditions and looped on with the help with the dfs_cache_tgt_iterator * Updating the target hint to the next target is done with dfs_cache_update_tgthint() These functions have a dfs_cache_noreq_XXX() version that doesn't fetches referrals if no entries are found. These versions don't require the tcp/ses/tcon/cifs_sb parameters as a result. Expired entries cannot be used and since they have a pretty short TTL [1] in order for them to be useful for failover the DFS cache adds a delayed work called periodically to keep them fresh. Since we might not have available connections to issue the referral request when refreshing we need to store volume_info structs with credentials and other needed info to be able to connect to the right server. 1: Windows defaults: 5mn for domain-based referrals, 30mn for regular links Signed-off-by: Paulo Alcantara <palcantara@suse.de> Signed-off-by: Aurelien Aptel <aaptel@suse.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2018-11-02smb3: allow more detailed protocol info on open files for debuggingSteve French
In order to debug complex problems it is often helpful to have detailed information on the client and server view of the open file information. Add the ability for root to view the list of smb3 open files and dump the persistent handle and other info so that it can be more easily correlated with server logs. Sample output from "cat /proc/fs/cifs/open_files" # Version:1 # Format: # <tree id> <persistent fid> <flags> <count> <pid> <uid> <filename> <mid> 0x5 0x800000378 0x8000 1 7704 0 some-file 0x14 0xcb903c0c 0x84412e67 0x8000 1 7754 1001 rofile 0x1a6d 0xcb903c0c 0x9526b767 0x8000 1 7720 1000 file 0x1a5b 0xcb903c0c 0x9ce41a21 0x8000 1 7715 0 smallfile 0xd67 Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
2018-10-23smb3 - clean up debug output displaying network interfacesSteve French
Make the output of /proc/fs/cifs/DebugData a little easier to read by cleaning up the listing of network interfaces removing a wasted line break. Here is a comparison of the network interface information that from be viewed at the end of output from "cat /proc/fs/cifs/DebugData" Before: Server interfaces: 8 0) Speed: 10000000000 bps Capabilities: rss IPv6: fe80:0000:0000:0000:2cf5:407e:84b0:21dd 1) Speed: 1000000000 bps Capabilities: IPv6: fe80:0000:0000:0000:61cd:6147:3d0c:f484 vs. after: Server interfaces: 11 0) Speed: 10000000000 bps Capabilities: rss IPv6: fe80:0000:0000:0000:2cf5:407e:84b0:21dd 1) Speed: 2000000000 bps Capabilities: IPv6: fe80:0000:0000:0000:3d76:2d05:dcf8:ed10 Signed-off-by: Steve French <stfrench@microsoft.com>
2018-10-23smb3: track the instance of each session for debuggingSteve French
Each time we reconnect to the same server, bump an instance counter (and display in /proc/fs/cifs/DebugData) to make it easier to debug. Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Aurelien Aptel <aaptel@suse.com> Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
2018-10-23smb3: allow stats which track session and share reconnects to be resetSteve French
Currently, "echo 0 > /proc/fs/cifs/Stats" resets all of the stats except the session and share reconnect counts. Fix it to reset those as well. CC: Stable <stable@vger.kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Aurelien Aptel <aaptel@suse.com>
2018-08-07smb3: display stats counters for number of slow commandsSteve French
When CONFIG_CIFS_STATS2 is enabled keep counters for slow commands (ie server took longer than 1 second to respond) by SMB2/SMB3 command code. This can help in diagnosing whether performance problems are on server (instead of client) and which commands are causing the problem. Sample output (the new lines contain words "slow responses ...") $ cat /proc/fs/cifs/Stats Resources in use CIFS Session: 1 Share (unique mount targets): 2 SMB Request/Response Buffer: 1 Pool size: 5 SMB Small Req/Resp Buffer: 1 Pool size: 30 Total Large 10 Small 490 Allocations Operations (MIDs): 0 0 session 0 share reconnects Total vfs operations: 67 maximum at one time: 2 4 slow responses from localhost for command 5 1 slow responses from localhost for command 6 1 slow responses from localhost for command 14 1 slow responses from localhost for command 16 1) \\localhost\test SMBs: 243 Bytes read: 1024000 Bytes written: 104857600 TreeConnects: 1 total 0 failed TreeDisconnects: 0 total 0 failed Creates: 40 total 0 failed Closes: 39 total 0 failed ... Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com> Reviewed-by: Aurelien Aptel <aaptel@suse.com>
2018-08-07smb3: fix minor debug output for CONFIG_CIFS_STATSSteve French
CONFIG_CIFS_STATS is now always enabled (to simplify the code and since the STATS are important for some common customer use cases and also debugging), but needed one minor change so that STATS shows as enabled in the debug output in /proc/fs/cifs/DebugData, otherwise it could get confusing with STATS no longer showing up in the "Features" list in /proc/fs/cifs/DebugData when basic stats were in fact available. Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
2018-08-07smb3: fix reset of bytes read and written statsSteve French
echo 0 > /proc/fs/cifs/Stats is supposed to reset the stats but there were four (see example below) that were not reset (bytes read and witten, total vfs ops and max ops at one time). ... 0 session 0 share reconnects Total vfs operations: 100 maximum at one time: 2 1) \\localhost\test SMBs: 0 Bytes read: 502092 Bytes written: 31457286 TreeConnects: 0 total 0 failed TreeDisconnects: 0 total 0 failed ... This patch fixes cifs_stats_proc_write to properly reset those four. Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Aurelien Aptel <aaptel@suse.com>
2018-08-07cifs: simple stats should always be enabledSteve French
CONFIG_CIFS_STATS should always be enabled as Pavel recently noted. Simple statistics are not a significant performance hit, and removing the ifdef simplifies the code slightly. Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com> Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
2018-08-07smb3: simplify code by removing CONFIG_CIFS_SMB311Steve French
We really, really want to be encouraging use of secure dialects, and SMB3.1.1 offers useful security features, and will soon be the recommended dialect for many use cases. Simplify the code by removing the CONFIG_CIFS_SMB311 ifdef so users don't disable it in the build, and create compatibility and/or security issues with modern servers - many of which have been supporting this dialect for multiple years. Also clarify some of the Kconfig text for cifs.ko about SMB3.1.1 and current supported features in the module. Signed-off-by: Steve French <stfrench@microsoft.com> Acked-by: Aurelien Aptel <aaptel@suse.com> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
2018-08-07cifs: add missing debug entries for kconfig optionsSteve French
/proc/fs/cifs/DebugData displays the features (Kconfig options) used to build cifs.ko but it was missing some, and needed comma separator. These can be useful in debugging certain problems so we know which optional features were enabled in the user's build. Also clarify them, by making them more closely match the corresponding CONFIG_CIFS_* parm. Old format: Features: dfs fscache posix spnego xattr acl New format: Features: DFS,FSCACHE,SMB_DIRECT,STATS,DEBUG2,ALLOW_INSECURE_LEGACY,CIFS_POSIX,UPCALL(SPNEGO),XATTR,ACL Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com> Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com> Reviewed-by: Paulo Alcantara <palcantara@suse.de> CC: Stable <stable@vger.kernel.org>
2018-06-15smb3: do not display empty interface listSteve French
If server does not support listing interfaces then do not display empty "Server interfaces" line to avoid confusing users. Signed-off-by: Steve French <stfrench@microsoft.com> CC: Aurelien Aptel <aaptel@suse.com>
2018-06-15CIFS: dump every session iface infoAurelien Aptel
Signed-off-by: Aurelien Aptel <aaptel@suse.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2018-06-04Merge tag '4.18-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6Linus Torvalds
Pull cifs updates from Steve French: - smb3 fixes for stable - addition of ftrace hooks for cifs.ko - improvements in compounding and smbdirect (rdma) * tag '4.18-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6: (38 commits) CIFS: Add support for direct pages in wdata CIFS: Use offset when reading pages CIFS: Add support for direct pages in rdata cifs: update multiplex loop to handle compounded responses cifs: remove header_preamble_size where it is always 0 cifs: remove struct smb2_hdr CIFS: 511c54a2f69195b28afb9dd119f03787b1625bb4 adds a check for session expiry, status STATUS_NETWORK_SESSION_EXPIRED, however the server can also respond with STATUS_USER_SESSION_DELETED in cases where the session has been idle for some time and the server reaps the session to recover resources. cifs: change smb2_get_data_area_len to take a smb2_sync_hdr as argument cifs: update smb2_calc_size to use smb2_sync_hdr instead of smb2_hdr cifs: remove struct smb2_oplock_break_rsp cifs: remove rfc1002 header from all SMB2 response structures smb3: on reconnect set PreviousSessionId field smb3: Add posix create context for smb3.11 posix mounts smb3: add tracepoints for smb2/smb3 open cifs: add debug output to show nocase mount option smb3: add define for id for posix create context and corresponding struct cifs: update smb2_check_message to handle PDUs without a 4 byte length header smb3: allow "posix" mount option to enable new SMB311 protocol extensions smb3: add support for posix negotiate context cifs: allow disabling less secure legacy dialects ...
2018-05-30cifs: add debug output to show nocase mount optionSteve French
For smb1 nocase can be specified on mount. Allow displaying it in debug data. Signed-off-by: Steve French <smfrench@gmail.com>
2018-05-30smb3: add support for posix negotiate contextSteve French
Unlike CIFS where UNIX/POSIX extensions had been negotiatable, SMB3 did not have POSIX extensions yet. Add the new SMB3.11 POSIX negotiate context to ask the server whether it can support POSIX (and thus whether we can send the new POSIX open context). Signed-off-by: Steve French <smfrench@gmail.com>
2018-05-30cifs: show the "w" bit for writeable /proc/fs/cifs/* filesRonnie Sahlberg
RHBZ: 1539612 Lets show the "w" bit for those files have a .write interface to set/enable/... the feature. Reported-by: Xiaoli Feng <xifeng@redhat.com> Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2018-05-30cifs: return error on invalid value written to cifsFYIRonnie Sahlberg
RHBZ: 1539617 Check that, if it is not a boolean, the value the user tries to write to /proc/fs/cifs/cifsFYI is valid and return an error if not. Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com> Reported-by: Xiaoli Feng <xifeng@redhat.com>
2018-05-27cifs: fix build break when CONFIG_CIFS_DEBUG2 enabledSteve French
Previous patches "cifs: update calc_size to take a server argument" and "cifs: add server argument to the dump_detail method" were broken if CONFIG_CIFS_DEBUG2 enabled Signed-off-by: Steve French <smfrench@gmail.com> CC: Ronnie Sahlberg <lsahlber@redhat.com>
2018-05-27cifs: add server argument to the dump_detail methodRonnie Sahlberg
We need a struct TCP_Server_Info *server to this method as it calls calc_size. The calc_size method will soon be changed to also take a server argument. Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <smfrench@gmail.com>
2018-05-16proc: introduce proc_create_single{,_data}Christoph Hellwig
Variants of proc_create{,_data} that directly take a seq_file show callback and drastically reduces the boilerplate code in the callers. All trivial callers converted over. Signed-off-by: Christoph Hellwig <hch@lst.de>
2018-04-11CIFS: add ONCE flag for cifs_dbg typeAurelien Aptel
* Since cifs_vfs_error was just using pr_debug_ratelimited like the rest of cifs_dbg, move it there too * Add a ONCE type flag to call the pr_xxx_once() debug function instead of the ratelimited ones. To convert existing printk_once() calls to this we can run: perl -i -pE \ 's/printk_once\s*\(([^" \n]+)(.*)/cifs_dbg(VFS|ONCE,$2/g' \ fs/cifs/*.c Signed-off-by: Aurelien Aptel <aaptel@suse.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2018-02-07Add some missing debug fields in server and tcon structsSteve French
Allow dumping out debug information on dialect, signing, unix extensions and encryption Signed-off-by: Steve French <smfrench@gmail.com> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
2018-01-26move a few externs to smbdirect.h to eliminate warningSteve French
Quiet minor sparse warnings in new SMB3 rdma patch series ("symbol was not declared ...") by moving these externs to smbdirect.h Signed-off-by: Steve French <smfrench@gmail.com> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
2018-01-26CIFS: dump IPC tcon in debug proc fileAurelien Aptel
dump it as first share with an "IPC: " prefix. Signed-off-by: Aurelien Aptel <aaptel@suse.com> Signed-off-by: Steve French <smfrench@gmail.com> Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
2018-01-24CIFS: SMBD: Add SMB Direct debug countersLong Li
For debugging and troubleshooting, export SMBDirect debug counters to /proc/fs/cifs/DebugData. Signed-off-by: Long Li <longli@microsoft.com> Signed-off-by: Steve French <smfrench@gmail.com> Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
2018-01-24CIFS: SMBD: export protocol initial valuesLong Li
For use-configurable SMB Direct protocol values, export them to /proc/fs/cifs. Signed-off-by: Long Li <longli@microsoft.com> Signed-off-by: Steve French <smfrench@gmail.com> Acked-by: Ronnie Sahlberg <lsahlber@redhat.com> Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
2018-01-24CIFS: SMBD: Add rdma mount optionLong Li
Add "rdma" to CIFS mount options to connect to SMB Direct. Add checks to validate this is used on SMB 3.X dialects. To connect to SMBDirect, use "mount.cifs -o rdma,vers=3.x". At the time of this patch, 3.x can be 3.0, 3.02 or 3.1.1. Signed-off-by: Long Li <longli@microsoft.com> Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com> Signed-off-by: Steve French <smfrench@gmail.com> Acked-by: Ronnie Sahlberg <lsahlber.redhat.com>
2017-09-20[SMB3] Update session and share information displayed for debugging SMB2/SMB3Steve French
We were not displaying some key fields (session status and capabilities and whether guest authenticated) for SMB2/SMB3 session in /proc/fs/cifs/DebugData. This is needed for real world triage of problems with the (now much more common) SMB3 mounts. Signed-off-by: Steve French <smfrench@gmail.com>
2016-12-24Replace <asm/uaccess.h> with <linux/uaccess.h> globallyLinus Torvalds
This was entirely automated, using the script by Al: PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*<asm/uaccess.h>' sed -i -e "s!$PATT!#include <linux/uaccess.h>!" \ $(git grep -l "$PATT"|grep -v ^include/linux/uaccess.h) to do the replacement at the end of the merge window. Requested-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-10-12Display number of credits availableSteve French
In debugging smb3, it is useful to display the number of credits available, so we can see when the server has not granted sufficient operations for the client to make progress, or alternatively the client has requested too many credits (as we saw in a recent bug) so we can compare with the number of credits the server thinks we have. Add a /proc/fs/cifs/DebugData line to display the client view on how many credits are available. Signed-off-by: Steve French <steve.french@primarydata.com> Reported-by: Germano Percossi <germano.percossi@citrix.com> CC: Stable <stable@vger.kernel.org>
2016-05-29drop redundant ->owner initializationsAl Viro
it's not needed for file_operations of inodes located on fs defined in the hosting module and for file_operations that go into procfs. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-03-17lib: update single-char callers of strtobool()Kees Cook
Some callers of strtobool() were passing a pointer to unterminated strings. In preparation of adding multi-character processing to kstrtobool(), update the callers to not pass single-character pointers, and switch to using the new kstrtobool_from_user() helper where possible. Signed-off-by: Kees Cook <keescook@chromium.org> Cc: Amitkumar Karwar <akarwar@marvell.com> Cc: Nishant Sarmukadam <nishants@marvell.com> Cc: Kalle Valo <kvalo@codeaurora.org> Cc: Steve French <sfrench@samba.org> Cc: Andy Shevchenko <andy.shevchenko@gmail.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Joe Perches <joe@perches.com> Cc: Kees Cook <keescook@chromium.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-01-14cifs: Ratelimit kernel log messagesJamie Bainbridge
Under some conditions, CIFS can repeatedly call the cifs_dbg() logging wrapper. If done rapidly enough, the console framebuffer can softlockup or "rcu_sched self-detected stall". Apply the built-in log ratelimiters to prevent such hangs. Signed-off-by: Jamie Bainbridge <jamie.bainbridge@gmail.com> Signed-off-by: Steve French <smfrench@gmail.com> CC: Stable <stable@vger.kernel.org>
2015-01-26cifs: fix MUST SecurityFlags filteringNiklas Cassel
If CONFIG_CIFS_WEAK_PW_HASH is not set, CIFSSEC_MUST_LANMAN and CIFSSEC_MUST_PLNTXT is defined as 0. When setting new SecurityFlags without any MUST flags, your flags would be overwritten with CIFSSEC_MUST_LANMAN (0). Signed-off-by: Niklas Cassel <niklass@axis.com> Signed-off-by: Steve French <steve.french@primarydata.com>
2014-12-07cifs: convert printk(LEVEL...) to pr_<level>Andy Shevchenko
The useful macros embed message level in the name. Thus, it cleans up the code a bit. In cases when it was plain printk() the conversion was done to info level. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Steve French <steve.french@primarydata.com>
2014-12-07cifs: convert to print_hex_dump() instead of custom implementationAndy Shevchenko
This patch converts custom dumper to use native print_hex_dump() instead. The cifs_dump_mem() will have an offsets per each line which differs it from the original code. In the dump_smb() we may use native print_hex_dump() as well. It will show slightly different output in ASCII part when character is unprintable, otherwise it keeps same structure. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Steve French <steve.french@primarydata.com>
2014-12-07cifs: call strtobool instead of custom implementationAndy Shevchenko
Meanwhile it cleans up the code, the behaviour is slightly changed. In case of providing non-boolean value it will fails with corresponding error. In the original code the attempt of an update was just ignored in such case. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Jeff Layton <jlayton@poochiereds.net> Reviewed-by: Alexander Bokovoy <ab@samba.org> Signed-off-by: Steve French <steve.french@primarydata.com>
2014-08-02[CIFS] Fix incorrect hex vs. decimal in some debug print statementsSteve French
Joe Perches and Hans Wennborg noticed that various places in the kernel were printing decimal numbers with 0x prefix. printk("0x%d") or equivalent This fixes the instances of this in the cifs driver. CC: Hans Wennborg <hans@hanshq.net> CC: Joe Perches <joe@perches.com> Signed-off-by: Steve French <smfrench@gmail.com>
2013-06-26cifs: try to handle the MUST SecurityFlags sanelyJeff Layton
The cifs.ko SecurityFlags interface wins my award for worst-designed interface ever, but we're sort of stuck with it since it's documented and people do use it (even if it doesn't work correctly). Case in point -- you can specify multiple sets of "MUST" flags. It makes absolutely no sense, but you can do it. What should the effect be in such a case? No one knows or seems to have considered this so far, so let's define it now. If you try to specify multiple MUST flags, clear any other MAY or MUST bits except for the ones that involve signing. Signed-off-by: Jeff Layton <jlayton@redhat.com> Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru> Signed-off-by: Steve French <smfrench@gmail.com>
2013-06-24Add ability to dipslay SMB3 share flags and capabilities for debuggingSteve French
SMB3 protocol adds various optional per-share capabilities (and SMB3.02 adds one more beyond that). Add ability to dump (/proc/fs/cifs/DebugData) the share capabilities and share flags to improve debugging. Signed-off-by: Steve French <smfrench@gmail.com> Acked-by: Jeff Layton <jlayton@redhat.com>
2013-06-24cifs: clean up the SecurityFlags write handlerJeff Layton
The SecurityFlags handler uses an obsolete simple_strtoul() call, and doesn't really handle the bounds checking well. Fix it to use kstrtouint() instead. Clean up the error messages as well and fix a bogus check for an unsigned int to be less than 0. Signed-off-by: Jeff Layton <jlayton@redhat.com> Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru> Signed-off-by: Steve French <smfrench@gmail.com>