f2fs: use mnt_{want,drop}_write_file in ioctl

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In interfaces of ioctl, mnt_{want,drop}_write_file should be used for:
- get exclusion against file system freezing which may used by lvm
  snapshot.
- do telling filesystem that a write is about to be performed on it, and
  make sure that the writes are permitted.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

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Chao Yu 2016-05-09 19:56:32 +08:00 • committed by Jaegeuk Kim

parent 0080c50764

commit 7fb17fe44b

1 changed files with 87 additions and 30 deletions

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fs/f2fs/file.c

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