diff options
| -rw-r--r-- | fs/xfs/xfs_mount.c | 51 | ||||
| -rw-r--r-- | fs/xfs/xfs_mount.h | 11 | ||||
| -rw-r--r-- | fs/xfs/xfs_trans.c | 198 |
3 files changed, 126 insertions, 134 deletions
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c index df4c32fdc706..d748aa73003b 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -1353,57 +1353,6 @@ xfs_mod_incore_sb( } /* - * 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. * The buffer should be released with a call to xfs_brelse(). diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h index d65e0f23b847..1c11512bab83 100644 --- a/fs/xfs/xfs_mount.h +++ b/fs/xfs/xfs_mount.h @@ -260,15 +260,6 @@ xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d) } /* - * This structure is for use by the xfs_mod_incore_sb_batch() routine. - * xfs_growfs can specify a few fields which are more than int limit - */ -typedef struct xfs_mod_sb { - xfs_sb_field_t msb_field; /* Field to modify, see below */ - int64_t msb_delta; /* Change to make to specified field */ -} xfs_mod_sb_t; - -/* * Per-ag incore structure, copies of information in agf and agi, to improve the * performance of allocation group selection. */ @@ -325,8 +316,6 @@ extern int xfs_initialize_perag(xfs_mount_t *mp, xfs_agnumber_t agcount, extern void xfs_unmountfs(xfs_mount_t *); extern int xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int64_t, int); -extern int xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *, - uint, int); extern int xfs_mod_icount(struct xfs_mount *mp, int64_t delta); extern int xfs_mod_ifree(struct xfs_mount *mp, int64_t delta); extern int xfs_mod_fdblocks(struct xfs_mount *mp, int64_t delta, diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c index 4e4bc5aed6b6..220ef2c906b2 100644 --- a/fs/xfs/xfs_trans.c +++ b/fs/xfs/xfs_trans.c @@ -485,6 +485,54 @@ xfs_trans_apply_sb_deltas( 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 @@ -492,13 +540,6 @@ xfs_trans_apply_sb_deltas( * 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 @@ -506,20 +547,15 @@ xfs_trans_apply_sb_deltas( */ 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) @@ -560,72 +596,90 @@ xfs_trans_unreserve_and_mod_sb( 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: |