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Document ->tmpfile()

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2013-07-03 16:19:23 +04:00
parent af51a2ac36
commit 48bde8d362
2 changed files with 7 additions and 0 deletions
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2
Documentation/filesystems/Locking
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@ -64,6 +64,7 @@ prototypes:
int (*atomic_open)(struct inode *, struct dentry *, int (*atomic_open)(struct inode *, struct dentry *,
struct file *, unsigned open_flag, struct file *, unsigned open_flag,
umode_t create_mode, int *opened); umode_t create_mode, int *opened);
int (*tmpfile) (struct inode *, struct dentry *, umode_t);
locking rules: locking rules:
all may block all may block
@ -91,6 +92,7 @@ removexattr: yes
fiemap: no fiemap: no
update_time: no update_time: no
atomic_open: yes atomic_open: yes
tmpfile: no
Additionally, ->rmdir(), ->unlink() and ->rename() have ->i_mutex on Additionally, ->rmdir(), ->unlink() and ->rename() have ->i_mutex on
victim. victim.

5
Documentation/filesystems/vfs.txt
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@ -360,6 +360,8 @@ struct inode_operations {
int (*removexattr) (struct dentry *, const char *); int (*removexattr) (struct dentry *, const char *);
void (*update_time)(struct inode *, struct timespec *, int); void (*update_time)(struct inode *, struct timespec *, int);
int (*atomic_open)(struct inode *, struct dentry *, int (*atomic_open)(struct inode *, struct dentry *,
int (*tmpfile) (struct inode *, struct dentry *, umode_t);
} ____cacheline_aligned;
struct file *, unsigned open_flag, struct file *, unsigned open_flag,
umode_t create_mode, int *opened); umode_t create_mode, int *opened);
}; };
@ -472,6 +474,9 @@ otherwise noted.
component is negative or needs lookup. Cached positive dentries are component is negative or needs lookup. Cached positive dentries are
still handled by f_op->open(). 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 The Address Space Object
======================== ========================