Document ->tmpfile() (48bde8d3) · Commits · 戴 / test

Documentation/filesystems/Locking

+2 −0

Original line number	Diff line number	Diff line
		@@ -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.

+5 −0

Original line number	Diff line number	Diff line
		@@ -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
		========================