Document ->tmpfile()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index 7d9ca7a..e95d313 100644
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -64,6 +64,7 @@
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 @@
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 51ba44e..aeff462 100644
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -360,6 +360,8 @@
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 @@
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
========================
