xfs: check tp->t_dqinfo value instead of the XFS_TRANS_DQ_DIRTY flag

Nowadays the only things that the XFS_TRANS_DQ_DIRTY flag seems to do
are indicates the tp->t_dqinfo->dqs[XFS_QM_TRANS_{USR,GRP,PRJ}] values
changed and check in xfs_trans_apply_dquot_deltas() and the unreserve
variant xfs_trans_unreserve_and_mod_dquots(). Actually, we also can
use the tp->t_dqinfo value instead of the XFS_TRANS_DQ_DIRTY flag, that
is to say, we allocate the new tp->t_dqinfo only when the qtrx values
changed, so the tp->t_dqinfo value isn't NULL equals the XFS_TRANS_DQ_DIRTY
flag is set, we only need to check if tp->t_dqinfo == NULL in
xfs_trans_apply_dquot_deltas() and its unreserve variant to determine
whether lock all of the dquots and join them to the transaction.

Signed-off-by: Kaixu Xia <kaixuxia@tencent.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>

diff --git a/fs/xfs/libxfs/xfs_shared.h b/fs/xfs/libxfs/xfs_shared.h
index c795ae4..8c61a46 100644 (file)
--- a/fs/xfs/libxfs/xfs_shared.h
+++ b/fs/xfs/libxfs/xfs_shared.h
@@ -62,7 +62,6 @@ void  xfs_log_get_max_trans_res(struct xfs_mount *mp,
 #define        XFS_TRANS_SB_DIRTY      0x02    /* superblock is modified */
 #define        XFS_TRANS_PERM_LOG_RES  0x04    /* xact took a permanent log res */
 #define        XFS_TRANS_SYNC          0x08    /* make commit synchronous */
-#define XFS_TRANS_DQ_DIRTY     0x10    /* at least one dquot in trx dirty */
 #define XFS_TRANS_RESERVE      0x20    /* OK to use reserved data blocks */
 #define XFS_TRANS_NO_WRITECOUNT 0x40   /* do not elevate SB writecount */
 #define XFS_TRANS_RES_FDBLKS   0x80    /* reserve newly freed blocks */

diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 004fce3..034fe0a 100644 (file)
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -959,7 +959,6 @@ xfs_dir_ialloc(
        xfs_buf_t       *ialloc_context = NULL;
        int             code;
        void            *dqinfo;
-       uint            tflags;
 
        tp = *tpp;
        ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES);
@@ -1018,12 +1017,9 @@ xfs_dir_ialloc(
                 * and attach it to the next transaction.
                 */
                dqinfo = NULL;
-               tflags = 0;
                if (tp->t_dqinfo) {
                        dqinfo = (void *)tp->t_dqinfo;
                        tp->t_dqinfo = NULL;
-                       tflags = tp->t_flags & XFS_TRANS_DQ_DIRTY;
-                       tp->t_flags &= ~(XFS_TRANS_DQ_DIRTY);
                }
 
                code = xfs_trans_roll(&tp);
@@ -1031,10 +1027,8 @@ xfs_dir_ialloc(
                /*
                 * Re-attach the quota info that we detached from prev trx.
                 */
-               if (dqinfo) {
+               if (dqinfo)
                        tp->t_dqinfo = dqinfo;
-                       tp->t_flags |= tflags;
-               }
 
                if (code) {
                        xfs_buf_relse(ialloc_context);

diff --git a/fs/xfs/xfs_trans_dquot.c b/fs/xfs/xfs_trans_dquot.c
index 67f1e27..0ebfd79 100644 (file)
--- a/fs/xfs/xfs_trans_dquot.c
+++ b/fs/xfs/xfs_trans_dquot.c
@@ -84,13 +84,6 @@ xfs_trans_dup_dqinfo(
 
        xfs_trans_alloc_dqinfo(ntp);
 
-       /*
-        * Because the quota blk reservation is carried forward,
-        * it is also necessary to carry forward the DQ_DIRTY flag.
-        */
-       if (otp->t_flags & XFS_TRANS_DQ_DIRTY)
-               ntp->t_flags |= XFS_TRANS_DQ_DIRTY;
-
        for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
                oqa = otp->t_dqinfo->dqs[j];
                nqa = ntp->t_dqinfo->dqs[j];
@@ -270,8 +263,6 @@ xfs_trans_mod_dquot(
 
        if (delta)
                trace_xfs_trans_mod_dquot_after(qtrx);
-
-       tp->t_flags |= XFS_TRANS_DQ_DIRTY;
 }
 
 
@@ -348,7 +339,7 @@ xfs_trans_apply_dquot_deltas(
        int64_t                 totalbdelta;
        int64_t                 totalrtbdelta;
 
-       if (!(tp->t_flags & XFS_TRANS_DQ_DIRTY))
+       if (!tp->t_dqinfo)
                return;
 
        ASSERT(tp->t_dqinfo);
@@ -490,7 +481,7 @@ xfs_trans_unreserve_and_mod_dquots(
        struct xfs_dqtrx        *qtrx, *qa;
        bool                    locked;
 
-       if (!tp->t_dqinfo || !(tp->t_flags & XFS_TRANS_DQ_DIRTY))
+       if (!tp->t_dqinfo)
                return;
 
        for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {