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| author |   Al Viro <viro@zeniv.linux.org.uk> | 2013-07-03 16:19:23 +0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2013-07-03 16:23:29 +0400 |
| commit | 48bde8d3620f5f3c6ae9ff599eb404055ae51664 (patch) | |
| tree | 7b59e511bcb0258bccafe3224db41a312b4fc2f0 /Documentation | |
| parent | ext4: ->tmpfile() support (diff) | |
| download | linux-dev-48bde8d3620f5f3c6ae9ff599eb404055ae51664.tar.xz linux-dev-48bde8d3620f5f3c6ae9ff599eb404055ae51664.zip | |
Document ->tmpfile()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/filesystems/Locking | 2 | ||||
| -rw-r--r-- | Documentation/filesystems/vfs.txt | 5 |
2 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking index 7d9ca7a83fcc..e95d3131309e 100644 --- a/Documentation/filesystems/Locking +++ b/Documentation/filesystems/Locking @@ -64,6 +64,7 @@ prototypes: int (*atomic_open)(struct inode *, struct dentry *, struct file *, unsigned open_flag, umode_t create_mode, int *opened); + int (*tmpfile) (struct inode *, struct dentry *, umode_t); locking rules: all may block @@ -91,6 +92,7 @@ removexattr: yes fiemap: no update_time: no atomic_open: yes +tmpfile: no Additionally, ->rmdir(), ->unlink() and ->rename() have ->i_mutex on victim. diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt index 51ba44e3fc40..aeff462c7228 100644 --- a/Documentation/filesystems/vfs.txt +++ b/Documentation/filesystems/vfs.txt @@ -360,6 +360,8 @@ struct inode_operations { int (*removexattr) (struct dentry *, const char *); void (*update_time)(struct inode *, struct timespec *, int); int (*atomic_open)(struct inode *, struct dentry *, + int (*tmpfile) (struct inode *, struct dentry *, umode_t); +} ____cacheline_aligned; struct file *, unsigned open_flag, umode_t create_mode, int *opened); }; @@ -472,6 +474,9 @@ otherwise noted. component is negative or needs lookup. Cached positive dentries are still handled by f_op->open(). + tmpfile: called in the end of O_TMPFILE open(). Optional, equivalent to + atomically creating, opening and unlinking a file in given directory. + The Address Space Object ======================== |