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author | Steven Whitehouse <swhiteho@redhat.com> | 2013-06-14 10:17:15 (GMT) |
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committer | Steven Whitehouse <swhiteho@redhat.com> | 2013-06-14 10:17:15 (GMT) |
commit | 6d4ade986f9c8df31e68fd30643997f79cc5a5f8 (patch) | |
tree | f0758a7a9b008d0bd3665234a5074e3cf6f4d455 /fs/gfs2/inode.h | |
parent | 5a00f3cc978be45b9d2597851bedaa40630bc597 (diff) | |
download | linux-fsl-qoriq-6d4ade986f9c8df31e68fd30643997f79cc5a5f8.tar.xz |
GFS2: Add atomic_open support
I've restricted atomic_open to only operate on regular files, although
I still don't understand why atomic_open should not be possible also for
directories on GFS2. That can always be added in later though, if it
makes sense.
The ->atomic_open function can be passed negative dentries, which
in most cases means either ENOENT (->lookup) or a call to d_instantiate
(->create). In the GFS2 case though, we need to actually perform the
look up, since we do not know whether there has been a new inode created
on another node. The look up calls d_splice_alias which then tries to
rehash the dentry - so the solution here is to simply check for that
in d_splice_alias. The same issue is likely to affect any other cluster
filesystem implementing ->atomic_open
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: "J. Bruce Fields" <bfields fieldses org>
Cc: Jeff Layton <jlayton@redhat.com>
Diffstat (limited to 'fs/gfs2/inode.h')
-rw-r--r-- | fs/gfs2/inode.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/gfs2/inode.h b/fs/gfs2/inode.h index c53c747..ba4d949 100644 --- a/fs/gfs2/inode.h +++ b/fs/gfs2/inode.h @@ -109,6 +109,7 @@ extern int gfs2_permission(struct inode *inode, int mask); extern int gfs2_setattr_simple(struct inode *inode, struct iattr *attr); extern struct inode *gfs2_lookup_simple(struct inode *dip, const char *name); extern void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf); +extern int gfs2_open_common(struct inode *inode, struct file *file); extern const struct inode_operations gfs2_file_iops; extern const struct inode_operations gfs2_dir_iops; |