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Commit 48bde8d3 authored by Al Viro's avatar Al Viro
Browse files

Document ->tmpfile() 



Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent af51a2ac

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.

Documentation/filesystems/vfs.txt

+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

========================