gfs2: perform quota checks against allocation parameters
Use struct gfs2_alloc_parms as an argument to gfs2_quota_check()
and gfs2_quota_lock_check() to check for quota violations while
accounting for the new blocks requested by the current operation
in ap->target.
Previously, the number of new blocks requested during an operation
were not accounted for during quota_check and would allow these
operations to exceed quota. This was not very apparent since most
operations allocated only 1 block at a time and quotas would get
violated in the next operation. i.e. quota excess would only be by
1 block or so. With fallocate, (where we allocate a bunch of blocks
at once) the quota excess is non-trivial and is addressed by this
patch.
Signed-off-by: Abhi Das <adas@redhat.com>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Acked-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/aops.c b/fs/gfs2/aops.c
index 4ad4f94..7bc5c82 100644
--- a/fs/gfs2/aops.c
+++ b/fs/gfs2/aops.c
@@ -671,12 +671,12 @@
if (alloc_required) {
struct gfs2_alloc_parms ap = { .aflags = 0, };
- error = gfs2_quota_lock_check(ip);
+ requested = data_blocks + ind_blocks;
+ ap.target = requested;
+ error = gfs2_quota_lock_check(ip, &ap);
if (error)
goto out_unlock;
- requested = data_blocks + ind_blocks;
- ap.target = requested;
error = gfs2_inplace_reserve(ip, &ap);
if (error)
goto out_qunlock;