xfs: make inode quota check more general

The xfs checks quota when reserving disk blocks and inodes. In the block
reservation, it checks if the total number of blocks including current
usage and new reservation exceed quota. In the inode reservation,
it checks using the total number of inodes including only current usage
without new reservation. However, this inode quota check works well
since the caller of xfs_trans_dquot() always sets the argument of the
number of new inode reservation to 1 or 0 and inode is reserved one by
one in current xfs.

To make it more general, this patch changes it to the same way as the
block quota check.

Signed-off-by: Mitsuo Hayasaka <mitsuo.hayasaka.hu@hitachi.com>
Cc: Ben Myers <bpm@sgi.com>
Cc: Alex Elder <elder@kernel.org>
Cc: Christoph Hellwig <hch@lst.de>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ben Myers <bpm@sgi.com>

(cherry picked from commit c922bbc819324558e61402a7a76c10c550ca61bc)

1 files changed, 4 insertions, 2 deletions

diff --git a/fs/xfs/xfs_trans_dquot.c b/fs/xfs/xfs_trans_dquot.c
index 85255536b4b6..c4ba366d24e6 100644
--- a/fs/xfs/xfs_trans_dquot.c
+++ b/fs/xfs/xfs_trans_dquot.c
@@ -677,11 +677,13 @@ xfs_trans_dqresv(
                         if (!softlimit)
                                 softlimit = q->qi_isoftlimit;
 
-                        if (hardlimit > 0ULL && count >= hardlimit) {
+                        if (hardlimit > 0ULL &&
+                            hardlimit < ninos + count) {
                                 xfs_quota_warn(mp, dqp, QUOTA_NL_IHARDWARN);
                                 goto error_return;
                         }
-                        if (softlimit > 0ULL && count >= softlimit) {
+                        if (softlimit > 0ULL &&
+                            softlimit < ninos + count) {
                                 if  ((timer != 0 && get_seconds() > timer) ||
                                      (warns != 0 && warns >= warnlimit)) {
                                         xfs_quota_warn(mp, dqp,