xfs: wire up Q_XGETNEXTQUOTA / get_nextdqblk

Source kernel commit 296c24e26ee3af2dbfecb482e6bc9560bd34c455

Add code to allow the Q_XGETNEXTQUOTA quotactl to quickly find
all active quotas by examining the quota inode, and skipping
over unallocated or uninitialized regions.

Userspace can then use this interface rather than i.e. a
getpwent() loop when asked to report all active quotas.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

diff --git a/libxfs/xfs_quota_defs.h b/libxfs/xfs_quota_defs.h
index f51078f1e92ad4e29b6dbe4c9e4fe8f46f9b2be6..8eed51275bb39b4466f8457b3dc7ba0aa592a583 100644 (file)
--- a/libxfs/xfs_quota_defs.h
+++ b/libxfs/xfs_quota_defs.h
@@ -37,7 +37,7 @@ typedef __uint16_t    xfs_qwarncnt_t;
 #define XFS_DQ_PROJ            0x0002          /* project quota */
 #define XFS_DQ_GROUP           0x0004          /* a group quota */
 #define XFS_DQ_DIRTY           0x0008          /* dquot is dirty */
-#define XFS_DQ_FREEING         0x0010          /* dquot is beeing torn down */
+#define XFS_DQ_FREEING         0x0010          /* dquot is being torn down */
 
 #define XFS_DQ_ALLTYPES                (XFS_DQ_USER|XFS_DQ_PROJ|XFS_DQ_GROUP)
 
@@ -116,6 +116,7 @@ typedef __uint16_t  xfs_qwarncnt_t;
 #define XFS_QMOPT_DQREPAIR     0x0001000 /* repair dquot if damaged */
 #define XFS_QMOPT_GQUOTA       0x0002000 /* group dquot requested */
 #define XFS_QMOPT_ENOSPC       0x0004000 /* enospc instead of edquot (prj) */
+#define XFS_QMOPT_DQNEXT       0x0008000 /* return next dquot >= this ID */
 
 /*
  * flags to xfs_trans_mod_dquot to indicate which field needs to be