]> pilppa.com Git - linux-2.6-omap-h63xx.git/commit
filesystem freeze: implement generic freeze feature
authorTakashi Sato <t-sato@yk.jp.nec.com>
Sat, 10 Jan 2009 00:40:59 +0000 (16:40 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Sat, 10 Jan 2009 00:54:42 +0000 (16:54 -0800)
commitfcccf502540e3d752d33b2d8e976034dee81f9f7
tree401be4ad2fc3c535a2fc77e413b1be4a736f320c
parentc4be0c1dc4cdc37b175579be1460f15ac6495e9a
filesystem freeze: implement generic freeze feature

The ioctls for the generic freeze feature are below.
o Freeze the filesystem
  int ioctl(int fd, int FIFREEZE, arg)
    fd: The file descriptor of the mountpoint
    FIFREEZE: request code for the freeze
    arg: Ignored
    Return value: 0 if the operation succeeds. Otherwise, -1

o Unfreeze the filesystem
  int ioctl(int fd, int FITHAW, arg)
    fd: The file descriptor of the mountpoint
    FITHAW: request code for unfreeze
    arg: Ignored
    Return value: 0 if the operation succeeds. Otherwise, -1
    Error number: If the filesystem has already been unfrozen,
                  errno is set to EINVAL.

[akpm@linux-foundation.org: fix CONFIG_BLOCK=n]
Signed-off-by: Takashi Sato <t-sato@yk.jp.nec.com>
Signed-off-by: Masayuki Hamaguchi <m-hamaguchi@ys.jp.nec.com>
Cc: <xfs-masters@oss.sgi.com>
Cc: <linux-ext4@vger.kernel.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Dave Kleikamp <shaggy@austin.ibm.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Alasdair G Kergon <agk@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
fs/block_dev.c
fs/buffer.c
fs/ioctl.c
include/linux/buffer_head.h
include/linux/fs.h