Merge tag 'fuse-update-4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse

Pull fuse updates from Miklos Szeredi:
 "As well as the usual bug fixes, this adds the following new features:

   - cached readdir and readlink

   - max I/O size increased from 128k to 1M

   - improved performance and scalability of request queues

   - copy_file_range support

  The only non-fuse bits are trivial cleanups of macros in
  <linux/bitops.h>"

* tag 'fuse-update-4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse: (31 commits)
  fuse: enable caching of symlinks
  fuse: only invalidate atime in direct read
  fuse: don't need GETATTR after every READ
  fuse: allow fine grained attr cache invaldation
  bitops: protect variables in bit_clear_unless() macro
  bitops: protect variables in set_mask_bits() macro
  fuse: realloc page array
  fuse: add max_pages to init_out
  fuse: allocate page array more efficiently
  fuse: reduce size of struct fuse_inode
  fuse: use iversion for readdir cache verification
  fuse: use mtime for readdir cache verification
  fuse: add readdir cache version
  fuse: allow using readdir cache
  fuse: allow caching readdir
  fuse: extract fuse_emit() helper
  fuse: add FOPEN_CACHE_DIR
  fuse: split out readdir.c
  fuse: Use hash table to link processing request
  fuse: kill req->intr_unique
  ...

2 files changed, 87 insertions, 62 deletions

diff --git a/include/linux/bitops.h b/include/linux/bitops.h
index 7ddb1349394d..705f7c442691 100644
--- a/include/linux/bitops.h
+++ b/include/linux/bitops.h
@@ -236,33 +236,33 @@ static __always_inline void __assign_bit(long nr, volatile unsigned long *addr,
 #ifdef __KERNEL__
 
 #ifndef set_mask_bits
-#define set_mask_bits(ptr, _mask, _bits)	\
+#define set_mask_bits(ptr, mask, bits)	\
 ({								\
-	const typeof(*ptr) mask = (_mask), bits = (_bits);	\
-	typeof(*ptr) old, new;					\
+	const typeof(*(ptr)) mask__ = (mask), bits__ = (bits);	\
+	typeof(*(ptr)) old__, new__;				\
 								\
 	do {							\
-		old = READ_ONCE(*ptr);			\
-		new = (old & ~mask) | bits;			\
-	} while (cmpxchg(ptr, old, new) != old);		\
+		old__ = READ_ONCE(*(ptr));			\
+		new__ = (old__ & ~mask__) | bits__;		\
+	} while (cmpxchg(ptr, old__, new__) != old__);		\
 								\
-	new;							\
+	new__;							\
 })
 #endif
 
 #ifndef bit_clear_unless
-#define bit_clear_unless(ptr, _clear, _test)	\
+#define bit_clear_unless(ptr, clear, test)	\
 ({								\
-	const typeof(*ptr) clear = (_clear), test = (_test);	\
-	typeof(*ptr) old, new;					\
+	const typeof(*(ptr)) clear__ = (clear), test__ = (test);\
+	typeof(*(ptr)) old__, new__;				\
 								\
 	do {							\
-		old = READ_ONCE(*ptr);			\
-		new = old & ~clear;				\
-	} while (!(old & test) &&				\
-		 cmpxchg(ptr, old, new) != old);		\
+		old__ = READ_ONCE(*(ptr));			\
+		new__ = old__ & ~clear__;			\
+	} while (!(old__ & test__) &&				\
+		 cmpxchg(ptr, old__, new__) != old__);		\
 								\
-	!(old & test);						\
+	!(old__ & test__);					\
 })
 #endif
 
diff --git a/include/uapi/linux/fuse.h b/include/uapi/linux/fuse.h
index 92fa24c24c92..b4967d48bfda 100644
--- a/include/uapi/linux/fuse.h
+++ b/include/uapi/linux/fuse.h
@@ -116,6 +116,12 @@
  *
  *  7.27
  *  - add FUSE_ABORT_ERROR
+ *
+ *  7.28
+ *  - add FUSE_COPY_FILE_RANGE
+ *  - add FOPEN_CACHE_DIR
+ *  - add FUSE_MAX_PAGES, add max_pages to init_out
+ *  - add FUSE_CACHE_SYMLINKS
  */
 
 #ifndef _LINUX_FUSE_H
@@ -151,7 +157,7 @@
 #define FUSE_KERNEL_VERSION 7
 
 /** Minor version number of this interface */
-#define FUSE_KERNEL_MINOR_VERSION 27
+#define FUSE_KERNEL_MINOR_VERSION 28
 
 /** The node ID of the root inode */
 #define FUSE_ROOT_ID 1
@@ -219,10 +225,12 @@ struct fuse_file_lock {
  * FOPEN_DIRECT_IO: bypass page cache for this open file
  * FOPEN_KEEP_CACHE: don't invalidate the data cache on open
  * FOPEN_NONSEEKABLE: the file is not seekable
+ * FOPEN_CACHE_DIR: allow caching this directory
  */
 #define FOPEN_DIRECT_IO		(1 << 0)
 #define FOPEN_KEEP_CACHE	(1 << 1)
 #define FOPEN_NONSEEKABLE	(1 << 2)
+#define FOPEN_CACHE_DIR		(1 << 3)
 
 /**
  * INIT request/reply flags
@@ -249,6 +257,8 @@ struct fuse_file_lock {
  * FUSE_HANDLE_KILLPRIV: fs handles killing suid/sgid/cap on write/chown/trunc
  * FUSE_POSIX_ACL: filesystem supports posix acls
  * FUSE_ABORT_ERROR: reading the device after abort returns ECONNABORTED
+ * FUSE_MAX_PAGES: init_out.max_pages contains the max number of req pages
+ * FUSE_CACHE_SYMLINKS: cache READLINK responses
  */
 #define FUSE_ASYNC_READ		(1 << 0)
 #define FUSE_POSIX_LOCKS	(1 << 1)
@@ -272,6 +282,8 @@ struct fuse_file_lock {
 #define FUSE_HANDLE_KILLPRIV	(1 << 19)
 #define FUSE_POSIX_ACL		(1 << 20)
 #define FUSE_ABORT_ERROR	(1 << 21)
+#define FUSE_MAX_PAGES		(1 << 22)
+#define FUSE_CACHE_SYMLINKS	(1 << 23)
 
 /**
  * CUSE INIT request/reply flags
@@ -337,53 +349,54 @@ struct fuse_file_lock {
 #define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0)
 
 enum fuse_opcode {
-	FUSE_LOOKUP	   = 1,
-	FUSE_FORGET	   = 2,  /* no reply */
-	FUSE_GETATTR	   = 3,
-	FUSE_SETATTR	   = 4,
-	FUSE_READLINK	   = 5,
-	FUSE_SYMLINK	   = 6,
-	FUSE_MKNOD	   = 8,
-	FUSE_MKDIR	   = 9,
-	FUSE_UNLINK	   = 10,
-	FUSE_RMDIR	   = 11,
-	FUSE_RENAME	   = 12,
-	FUSE_LINK	   = 13,
-	FUSE_OPEN	   = 14,
-	FUSE_READ	   = 15,
-	FUSE_WRITE	   = 16,
-	FUSE_STATFS	   = 17,
-	FUSE_RELEASE       = 18,
-	FUSE_FSYNC         = 20,
-	FUSE_SETXATTR      = 21,
-	FUSE_GETXATTR      = 22,
-	FUSE_LISTXATTR     = 23,
-	FUSE_REMOVEXATTR   = 24,
-	FUSE_FLUSH         = 25,
-	FUSE_INIT          = 26,
-	FUSE_OPENDIR       = 27,
-	FUSE_READDIR       = 28,
-	FUSE_RELEASEDIR    = 29,
-	FUSE_FSYNCDIR      = 30,
-	FUSE_GETLK         = 31,
-	FUSE_SETLK         = 32,
-	FUSE_SETLKW        = 33,
-	FUSE_ACCESS        = 34,
-	FUSE_CREATE        = 35,
-	FUSE_INTERRUPT     = 36,
-	FUSE_BMAP          = 37,
-	FUSE_DESTROY       = 38,
-	FUSE_IOCTL         = 39,
-	FUSE_POLL          = 40,
-	FUSE_NOTIFY_REPLY  = 41,
-	FUSE_BATCH_FORGET  = 42,
-	FUSE_FALLOCATE     = 43,
-	FUSE_READDIRPLUS   = 44,
-	FUSE_RENAME2       = 45,
-	FUSE_LSEEK         = 46,
+	FUSE_LOOKUP		= 1,
+	FUSE_FORGET		= 2,  /* no reply */
+	FUSE_GETATTR		= 3,
+	FUSE_SETATTR		= 4,
+	FUSE_READLINK		= 5,
+	FUSE_SYMLINK		= 6,
+	FUSE_MKNOD		= 8,
+	FUSE_MKDIR		= 9,
+	FUSE_UNLINK		= 10,
+	FUSE_RMDIR		= 11,
+	FUSE_RENAME		= 12,
+	FUSE_LINK		= 13,
+	FUSE_OPEN		= 14,
+	FUSE_READ		= 15,
+	FUSE_WRITE		= 16,
+	FUSE_STATFS		= 17,
+	FUSE_RELEASE		= 18,
+	FUSE_FSYNC		= 20,
+	FUSE_SETXATTR		= 21,
+	FUSE_GETXATTR		= 22,
+	FUSE_LISTXATTR		= 23,
+	FUSE_REMOVEXATTR	= 24,
+	FUSE_FLUSH		= 25,
+	FUSE_INIT		= 26,
+	FUSE_OPENDIR		= 27,
+	FUSE_READDIR		= 28,
+	FUSE_RELEASEDIR		= 29,
+	FUSE_FSYNCDIR		= 30,
+	FUSE_GETLK		= 31,
+	FUSE_SETLK		= 32,
+	FUSE_SETLKW		= 33,
+	FUSE_ACCESS		= 34,
+	FUSE_CREATE		= 35,
+	FUSE_INTERRUPT		= 36,
+	FUSE_BMAP		= 37,
+	FUSE_DESTROY		= 38,
+	FUSE_IOCTL		= 39,
+	FUSE_POLL		= 40,
+	FUSE_NOTIFY_REPLY	= 41,
+	FUSE_BATCH_FORGET	= 42,
+	FUSE_FALLOCATE		= 43,
+	FUSE_READDIRPLUS	= 44,
+	FUSE_RENAME2		= 45,
+	FUSE_LSEEK		= 46,
+	FUSE_COPY_FILE_RANGE	= 47,
 
 	/* CUSE specific operations */
-	CUSE_INIT          = 4096,
+	CUSE_INIT		= 4096,
 };
 
 enum fuse_notify_code {
@@ -610,7 +623,9 @@ struct fuse_init_out {
 	uint16_t	congestion_threshold;
 	uint32_t	max_write;
 	uint32_t	time_gran;
-	uint32_t	unused[9];
+	uint16_t	max_pages;
+	uint16_t	padding;
+	uint32_t	unused[8];
 };
 
 #define CUSE_INIT_INFO_MAX 4096
@@ -792,4 +807,14 @@ struct fuse_lseek_out {
 	uint64_t	offset;
 };
 
+struct fuse_copy_file_range_in {
+	uint64_t	fh_in;
+	uint64_t	off_in;
+	uint64_t	nodeid_out;
+	uint64_t	fh_out;
+	uint64_t	off_out;
+	uint64_t	len;
+	uint64_t	flags;
+};
+
 #endif /* _LINUX_FUSE_H */