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| author | Jan Kara <jack@suse.cz> | 2012-06-12 16:20:33 +0200 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-07-31 01:02:51 +0400 |
| commit | 4a55c1017b8dcfd0554734ce3f19374d5b522d59 (patch) | |
| tree | 11bb9456d121ff1cc0adad10da12b25083823a19 /fs/nfsd/vfs.h | |
| parent | e7848683ae7ded0a4a8964122a47da9104a98337 (diff) | |
| download | linux-4a55c1017b8dcfd0554734ce3f19374d5b522d59.tar.gz linux-4a55c1017b8dcfd0554734ce3f19374d5b522d59.tar.bz2 linux-4a55c1017b8dcfd0554734ce3f19374d5b522d59.zip | |
nfsd: Push mnt_want_write() outside of i_mutex
When mnt_want_write() starts to handle freezing it will get a full lock
semantics requiring proper lock ordering. So push mnt_want_write() call
consistently outside of i_mutex.
CC: linux-nfs@vger.kernel.org
CC: "J. Bruce Fields" <bfields@fieldses.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/nfsd/vfs.h')
| -rw-r--r-- | fs/nfsd/vfs.h | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/fs/nfsd/vfs.h b/fs/nfsd/vfs.h index ec0611b2b738..359594c393d2 100644 --- a/fs/nfsd/vfs.h +++ b/fs/nfsd/vfs.h @@ -110,12 +110,19 @@ int nfsd_set_posix_acl(struct svc_fh *, int, struct posix_acl *); static inline int fh_want_write(struct svc_fh *fh) { - return mnt_want_write(fh->fh_export->ex_path.mnt); + int ret = mnt_want_write(fh->fh_export->ex_path.mnt); + + if (!ret) + fh->fh_want_write = 1; + return ret; } static inline void fh_drop_write(struct svc_fh *fh) { - mnt_drop_write(fh->fh_export->ex_path.mnt); + if (fh->fh_want_write) { + fh->fh_want_write = 0; + mnt_drop_write(fh->fh_export->ex_path.mnt); + } } #endif /* LINUX_NFSD_VFS_H */ |