return status;
}
-/*
- * Change more than one field in the in-core superblock structure at a time.
- *
- * The fields and changes to those fields are specified in the array of
- * xfs_mod_sb structures passed in. Either all of the specified deltas
- * will be applied or none of them will. If any modified field dips below 0,
- * then all modifications will be backed out and EINVAL will be returned.
- *
- * Note that this function may not be used for the superblock values that
- * are tracked with the in-memory per-cpu counters - a direct call to
- * xfs_mod_incore_sb is required for these.
- */
-int
-xfs_mod_incore_sb_batch(
- struct xfs_mount *mp,
- xfs_mod_sb_t *msb,
- uint nmsb,
- int rsvd)
-{
- xfs_mod_sb_t *msbp;
- int error = 0;
-
- /*
- * Loop through the array of mod structures and apply each individually.
- * If any fail, then back out all those which have already been applied.
- * Do all of this within the scope of the m_sb_lock so that all of the
- * changes will be atomic.
- */
- spin_lock(&mp->m_sb_lock);
- for (msbp = msb; msbp < (msb + nmsb); msbp++) {
- ASSERT(msbp->msb_field < XFS_SBS_ICOUNT ||
- msbp->msb_field > XFS_SBS_FDBLOCKS);
-
- error = xfs_mod_incore_sb_unlocked(mp, msbp->msb_field,
- msbp->msb_delta, rsvd);
- if (error)
- goto unwind;
- }
- spin_unlock(&mp->m_sb_lock);
- return 0;
-
-unwind:
- while (--msbp >= msb) {
- error = xfs_mod_incore_sb_unlocked(mp, msbp->msb_field,
- -msbp->msb_delta, rsvd);
- ASSERT(error == 0);
- }
- spin_unlock(&mp->m_sb_lock);
- return error;
-}
-
/*
* xfs_getsb() is called to obtain the buffer for the superblock.
* The buffer is returned locked and read in from disk.
sizeof(sbp->sb_frextents) - 1);
}
+STATIC int
+xfs_sb_mod8(
+ uint8_t *field,
+ int8_t delta)
+{
+ int8_t counter = *field;
+
+ counter += delta;
+ if (counter < 0) {
+ ASSERT(0);
+ return -EINVAL;
+ }
+ *field = counter;
+ return 0;
+}
+
+STATIC int
+xfs_sb_mod32(
+ uint32_t *field,
+ int32_t delta)
+{
+ int32_t counter = *field;
+
+ counter += delta;
+ if (counter < 0) {
+ ASSERT(0);
+ return -EINVAL;
+ }
+ *field = counter;
+ return 0;
+}
+
+STATIC int
+xfs_sb_mod64(
+ uint64_t *field,
+ int64_t delta)
+{
+ int64_t counter = *field;
+
+ counter += delta;
+ if (counter < 0) {
+ ASSERT(0);
+ return -EINVAL;
+ }
+ *field = counter;
+ return 0;
+}
+
/*
* xfs_trans_unreserve_and_mod_sb() is called to release unused reservations
* and apply superblock counter changes to the in-core superblock. The
* applied to the in-core superblock. The idea is that that has already been
* done.
*
- * This is done efficiently with a single call to xfs_mod_incore_sb_batch().
- * However, we have to ensure that we only modify each superblock field only
- * once because the application of the delta values may not be atomic. That can
- * lead to ENOSPC races occurring if we have two separate modifcations of the
- * free space counter to put back the entire reservation and then take away
- * what we used.
- *
* If we are not logging superblock counters, then the inode allocated/free and
* used block counts are not updated in the on disk superblock. In this case,
* XFS_TRANS_SB_DIRTY will not be set when the transaction is updated but we
*/
void
xfs_trans_unreserve_and_mod_sb(
- xfs_trans_t *tp)
+ struct xfs_trans *tp)
{
- xfs_mod_sb_t msb[9]; /* If you add cases, add entries */
- xfs_mod_sb_t *msbp;
- xfs_mount_t *mp = tp->t_mountp;
- /* REFERENCED */
- int error;
- bool rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0;
- int64_t blkdelta = 0;
- int64_t rtxdelta = 0;
- int64_t idelta = 0;
- int64_t ifreedelta = 0;
-
- msbp = msb;
+ struct xfs_mount *mp = tp->t_mountp;
+ bool rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0;
+ int64_t blkdelta = 0;
+ int64_t rtxdelta = 0;
+ int64_t idelta = 0;
+ int64_t ifreedelta = 0;
+ int error;
/* calculate deltas */
if (tp->t_blk_res > 0)
goto out_undo_icount;
}
+ if (rtxdelta == 0 && !(tp->t_flags & XFS_TRANS_SB_DIRTY))
+ return;
+
/* apply remaining deltas */
+ spin_lock(&mp->m_sb_lock);
if (rtxdelta) {
- error = xfs_mod_frextents(mp, rtxdelta);
+ error = xfs_sb_mod64(&mp->m_sb.sb_frextents, rtxdelta);
if (error)
goto out_undo_ifree;
}
- if (tp->t_flags & XFS_TRANS_SB_DIRTY) {
- if (tp->t_dblocks_delta != 0) {
- msbp->msb_field = XFS_SBS_DBLOCKS;
- msbp->msb_delta = tp->t_dblocks_delta;
- msbp++;
- }
- if (tp->t_agcount_delta != 0) {
- msbp->msb_field = XFS_SBS_AGCOUNT;
- msbp->msb_delta = tp->t_agcount_delta;
- msbp++;
- }
- if (tp->t_imaxpct_delta != 0) {
- msbp->msb_field = XFS_SBS_IMAX_PCT;
- msbp->msb_delta = tp->t_imaxpct_delta;
- msbp++;
- }
- if (tp->t_rextsize_delta != 0) {
- msbp->msb_field = XFS_SBS_REXTSIZE;
- msbp->msb_delta = tp->t_rextsize_delta;
- msbp++;
- }
- if (tp->t_rbmblocks_delta != 0) {
- msbp->msb_field = XFS_SBS_RBMBLOCKS;
- msbp->msb_delta = tp->t_rbmblocks_delta;
- msbp++;
- }
- if (tp->t_rblocks_delta != 0) {
- msbp->msb_field = XFS_SBS_RBLOCKS;
- msbp->msb_delta = tp->t_rblocks_delta;
- msbp++;
- }
- if (tp->t_rextents_delta != 0) {
- msbp->msb_field = XFS_SBS_REXTENTS;
- msbp->msb_delta = tp->t_rextents_delta;
- msbp++;
- }
- if (tp->t_rextslog_delta != 0) {
- msbp->msb_field = XFS_SBS_REXTSLOG;
- msbp->msb_delta = tp->t_rextslog_delta;
- msbp++;
- }
- }
-
- /*
- * If we need to change anything, do it.
- */
- if (msbp > msb) {
- error = xfs_mod_incore_sb_batch(tp->t_mountp, msb,
- (uint)(msbp - msb), rsvd);
+ if (tp->t_dblocks_delta != 0) {
+ error = xfs_sb_mod64(&mp->m_sb.sb_dblocks, tp->t_dblocks_delta);
if (error)
goto out_undo_frextents;
}
-
+ if (tp->t_agcount_delta != 0) {
+ error = xfs_sb_mod32(&mp->m_sb.sb_agcount, tp->t_agcount_delta);
+ if (error)
+ goto out_undo_dblocks;
+ }
+ if (tp->t_imaxpct_delta != 0) {
+ error = xfs_sb_mod8(&mp->m_sb.sb_imax_pct, tp->t_imaxpct_delta);
+ if (error)
+ goto out_undo_agcount;
+ }
+ if (tp->t_rextsize_delta != 0) {
+ error = xfs_sb_mod32(&mp->m_sb.sb_rextsize,
+ tp->t_rextsize_delta);
+ if (error)
+ goto out_undo_imaxpct;
+ }
+ if (tp->t_rbmblocks_delta != 0) {
+ error = xfs_sb_mod32(&mp->m_sb.sb_rbmblocks,
+ tp->t_rbmblocks_delta);
+ if (error)
+ goto out_undo_rextsize;
+ }
+ if (tp->t_rblocks_delta != 0) {
+ error = xfs_sb_mod64(&mp->m_sb.sb_rblocks, tp->t_rblocks_delta);
+ if (error)
+ goto out_undo_rbmblocks;
+ }
+ if (tp->t_rextents_delta != 0) {
+ error = xfs_sb_mod64(&mp->m_sb.sb_rextents,
+ tp->t_rextents_delta);
+ if (error)
+ goto out_undo_rblocks;
+ }
+ if (tp->t_rextslog_delta != 0) {
+ error = xfs_sb_mod8(&mp->m_sb.sb_rextslog,
+ tp->t_rextslog_delta);
+ if (error)
+ goto out_undo_rextents;
+ }
+ spin_unlock(&mp->m_sb_lock);
return;
+out_undo_rextents:
+ if (tp->t_rextents_delta)
+ xfs_sb_mod64(&mp->m_sb.sb_rextents, -tp->t_rextents_delta);
+out_undo_rblocks:
+ if (tp->t_rblocks_delta)
+ xfs_sb_mod64(&mp->m_sb.sb_rblocks, -tp->t_rblocks_delta);
+out_undo_rbmblocks:
+ if (tp->t_rbmblocks_delta)
+ xfs_sb_mod32(&mp->m_sb.sb_rbmblocks, -tp->t_rbmblocks_delta);
+out_undo_rextsize:
+ if (tp->t_rextsize_delta)
+ xfs_sb_mod32(&mp->m_sb.sb_rextsize, -tp->t_rextsize_delta);
+out_undo_imaxpct:
+ if (tp->t_rextsize_delta)
+ xfs_sb_mod8(&mp->m_sb.sb_imax_pct, -tp->t_imaxpct_delta);
+out_undo_agcount:
+ if (tp->t_agcount_delta)
+ xfs_sb_mod32(&mp->m_sb.sb_agcount, -tp->t_agcount_delta);
+out_undo_dblocks:
+ if (tp->t_dblocks_delta)
+ xfs_sb_mod64(&mp->m_sb.sb_dblocks, -tp->t_dblocks_delta);
out_undo_frextents:
if (rtxdelta)
- xfs_mod_frextents(mp, -rtxdelta);
+ xfs_sb_mod64(&mp->m_sb.sb_frextents, -rtxdelta);
out_undo_ifree:
+ spin_unlock(&mp->m_sb_lock);
if (ifreedelta)
xfs_mod_ifree(mp, -ifreedelta);
out_undo_icount:
projects / firefly-linux-kernel-4.4.55.git / commitdiff