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GFS2: Increase i_writecount during gfs2_setattr_chown

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This patch calls get_write_access in function gfs2_setattr_chown,
which merely increases inode->i_writecount for the duration of the
function. That will ensure that any file closes won't delete the
inode's multi-block reservation while the function is running.
It also ensures that a multi-block reservation exists when needed
for quota change operations during the chown.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Bob Peterson 2014-01-06 17:16:01 -05:00 committed by Steven Whitehouse
parent 2b47dad866
commit 62e96cf819
1 changed files with 15 additions and 1 deletions
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16
fs/gfs2/inode.c
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@ -1623,10 +1623,22 @@ static int setattr_chown(struct inode *inode, struct iattr *attr)
if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid))
ogid = ngid = NO_GID_QUOTA_CHANGE;
error = gfs2_quota_lock(ip, nuid, ngid);
error = get_write_access(inode);
if (error)
return error;
error = gfs2_rs_alloc(ip);
if (error)
goto out;
error = gfs2_rindex_update(sdp);
if (error)
goto out;
error = gfs2_quota_lock(ip, nuid, ngid);
if (error)
goto out;
if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) ||
!gid_eq(ogid, NO_GID_QUOTA_CHANGE)) {
error = gfs2_quota_check(ip, nuid, ngid);
@ -1653,6 +1665,8 @@ static int setattr_chown(struct inode *inode, struct iattr *attr)
gfs2_trans_end(sdp);
out_gunlock_q:
gfs2_quota_unlock(ip);
out:
put_write_access(inode);
return error;
}