diff options
Diffstat (limited to 'Documentation/filesystems')
| -rw-r--r-- | Documentation/filesystems/.gitignore | 1 | ||||
| -rw-r--r-- | Documentation/filesystems/Locking | 11 | ||||
| -rw-r--r-- | Documentation/filesystems/Makefile | 3 | ||||
| -rw-r--r-- | Documentation/filesystems/f2fs.txt | 13 | ||||
| -rw-r--r-- | Documentation/filesystems/vfs.txt | 7 |
5 files changed, 22 insertions, 13 deletions
diff --git a/Documentation/filesystems/.gitignore b/Documentation/filesystems/.gitignore new file mode 100644 index 000000000000..31d6e426b6d4 --- /dev/null +++ b/Documentation/filesystems/.gitignore @@ -0,0 +1 @@ +dnotify_test diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking index f1997e9da61f..94d93b1f8b53 100644 --- a/Documentation/filesystems/Locking +++ b/Documentation/filesystems/Locking @@ -464,15 +464,12 @@ prototypes: size_t, unsigned int); ssize_t (*splice_read)(struct file *, loff_t *, struct pipe_inode_info *, size_t, unsigned int); - int (*setlease)(struct file *, long, struct file_lock **); + int (*setlease)(struct file *, long, struct file_lock **, void **); long (*fallocate)(struct file *, int, loff_t, loff_t); }; locking rules: - All may block except for ->setlease. - No VFS locks held on entry except for ->setlease. - -->setlease has the file_list_lock held and must not sleep. + All may block. ->llseek() locking has moved from llseek to the individual llseek implementations. If your fs is not using generic_file_llseek, you @@ -496,6 +493,10 @@ components. And there are other reasons why the current interface is a mess... ->read on directories probably must go away - we should just enforce -EISDIR in sys_read() and friends. +->setlease operations should call generic_setlease() before or after setting +the lease within the individual filesystem to record the result of the +operation + --------------------------- dquot_operations ------------------------------- prototypes: int (*write_dquot) (struct dquot *); diff --git a/Documentation/filesystems/Makefile b/Documentation/filesystems/Makefile index a5dd114da14f..13483d192ebb 100644 --- a/Documentation/filesystems/Makefile +++ b/Documentation/filesystems/Makefile @@ -1,5 +1,4 @@ -# kbuild trick to avoid linker error. Can be omitted if a module is built. -obj- := dummy.o +subdir-y := configfs # List of programs to build hostprogs-y := dnotify_test diff --git a/Documentation/filesystems/f2fs.txt b/Documentation/filesystems/f2fs.txt index a2046a7d0a9d..2cca5a25ef89 100644 --- a/Documentation/filesystems/f2fs.txt +++ b/Documentation/filesystems/f2fs.txt @@ -192,15 +192,22 @@ Files in /sys/fs/f2fs/<devname> ipu_policy This parameter controls the policy of in-place updates in f2fs. There are five policies: - 0: F2FS_IPU_FORCE, 1: F2FS_IPU_SSR, - 2: F2FS_IPU_UTIL, 3: F2FS_IPU_SSR_UTIL, - 4: F2FS_IPU_DISABLE. + 0x01: F2FS_IPU_FORCE, 0x02: F2FS_IPU_SSR, + 0x04: F2FS_IPU_UTIL, 0x08: F2FS_IPU_SSR_UTIL, + 0x10: F2FS_IPU_FSYNC. min_ipu_util This parameter controls the threshold to trigger in-place-updates. The number indicates percentage of the filesystem utilization, and used by F2FS_IPU_UTIL and F2FS_IPU_SSR_UTIL policies. + min_fsync_blocks This parameter controls the threshold to trigger + in-place-updates when F2FS_IPU_FSYNC mode is set. + The number indicates the number of dirty pages + when fsync needs to flush on its call path. If + the number is less than this value, it triggers + in-place-updates. + max_victim_search This parameter controls the number of trials to find a victim segment when conducting SSR and cleaning operations. The default value is 4096 diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt index 02a766ca2f69..fceff7c00a3c 100644 --- a/Documentation/filesystems/vfs.txt +++ b/Documentation/filesystems/vfs.txt @@ -826,7 +826,7 @@ struct file_operations { int (*flock) (struct file *, int, struct file_lock *); ssize_t (*splice_write)(struct pipe_inode_info *, struct file *, size_t, unsigned int); ssize_t (*splice_read)(struct file *, struct pipe_inode_info *, size_t, unsigned int); - int (*setlease)(struct file *, long arg, struct file_lock **); + int (*setlease)(struct file *, long arg, struct file_lock **, void **); long (*fallocate)(struct file *, int mode, loff_t offset, loff_t len); int (*show_fdinfo)(struct seq_file *m, struct file *f); }; @@ -895,8 +895,9 @@ otherwise noted. splice_read: called by the VFS to splice data from file to a pipe. This method is used by the splice(2) system call - setlease: called by the VFS to set or release a file lock lease. - setlease has the file_lock_lock held and must not sleep. + setlease: called by the VFS to set or release a file lock lease. setlease + implementations should call generic_setlease to record or remove + the lease in the inode after setting it. fallocate: called by the VFS to preallocate blocks or punch a hole. |