diff options
-rw-r--r-- | fs/xfs/libxfs/xfs_ialloc.c | 6 | ||||
-rw-r--r-- | fs/xfs/libxfs/xfs_sb.c | 2 | ||||
-rw-r--r-- | fs/xfs/xfs_fsops.c | 3 | ||||
-rw-r--r-- | fs/xfs/xfs_mount.c | 76 | ||||
-rw-r--r-- | fs/xfs/xfs_mount.h | 7 | ||||
-rw-r--r-- | fs/xfs/xfs_super.c | 7 | ||||
-rw-r--r-- | fs/xfs/xfs_trans.c | 5 |
7 files changed, 54 insertions, 52 deletions
diff --git a/fs/xfs/libxfs/xfs_ialloc.c b/fs/xfs/libxfs/xfs_ialloc.c index 116ef1d..5b4ba9f 100644 --- a/fs/xfs/libxfs/xfs_ialloc.c +++ b/fs/xfs/libxfs/xfs_ialloc.c @@ -376,7 +376,8 @@ xfs_ialloc_ag_alloc( */ newlen = args.mp->m_ialloc_inos; if (args.mp->m_maxicount && - args.mp->m_sb.sb_icount + newlen > args.mp->m_maxicount) + percpu_counter_read(&args.mp->m_icount) + newlen > + args.mp->m_maxicount) return -ENOSPC; args.minlen = args.maxlen = args.mp->m_ialloc_blks; /* @@ -1340,7 +1341,8 @@ xfs_dialloc( * inode. */ if (mp->m_maxicount && - mp->m_sb.sb_icount + mp->m_ialloc_inos > mp->m_maxicount) { + percpu_counter_read(&mp->m_icount) + mp->m_ialloc_inos > + mp->m_maxicount) { noroom = 1; okalloc = 0; } diff --git a/fs/xfs/libxfs/xfs_sb.c b/fs/xfs/libxfs/xfs_sb.c index b0a5fe9..017cb2f 100644 --- a/fs/xfs/libxfs/xfs_sb.c +++ b/fs/xfs/libxfs/xfs_sb.c @@ -771,6 +771,8 @@ xfs_log_sb( struct xfs_mount *mp = tp->t_mountp; struct xfs_buf *bp = xfs_trans_getsb(tp, mp, 0); + mp->m_sb.sb_icount = percpu_counter_sum(&mp->m_icount); + xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb); xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF); xfs_trans_log_buf(tp, bp, 0, sizeof(struct xfs_dsb)); diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c index 74efe5b..b87a6f9 100644 --- a/fs/xfs/xfs_fsops.c +++ b/fs/xfs/xfs_fsops.c @@ -638,11 +638,12 @@ xfs_fs_counts( xfs_fsop_counts_t *cnt) { xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT); + cnt->allocino = percpu_counter_read_positive(&mp->m_icount); + spin_lock(&mp->m_sb_lock); cnt->freedata = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); cnt->freertx = mp->m_sb.sb_frextents; cnt->freeino = mp->m_sb.sb_ifree; - cnt->allocino = mp->m_sb.sb_icount; spin_unlock(&mp->m_sb_lock); return 0; } diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c index 4fa80e6..702ea6a 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -1099,6 +1099,21 @@ xfs_log_sbcount(xfs_mount_t *mp) return xfs_sync_sb(mp, true); } +int +xfs_mod_icount( + struct xfs_mount *mp, + int64_t delta) +{ + /* deltas are +/-64, hence the large batch size of 128. */ + __percpu_counter_add(&mp->m_icount, delta, 128); + if (percpu_counter_compare(&mp->m_icount, 0) < 0) { + ASSERT(0); + percpu_counter_add(&mp->m_icount, -delta); + return -EINVAL; + } + return 0; +} + /* * xfs_mod_incore_sb_unlocked() is a utility routine commonly used to apply * a delta to a specified field in the in-core superblock. Simply @@ -1127,14 +1142,8 @@ xfs_mod_incore_sb_unlocked( */ switch (field) { case XFS_SBS_ICOUNT: - lcounter = (long long)mp->m_sb.sb_icount; - lcounter += delta; - if (lcounter < 0) { - ASSERT(0); - return -EINVAL; - } - mp->m_sb.sb_icount = lcounter; - return 0; + ASSERT(0); + return -ENOSPC; case XFS_SBS_IFREE: lcounter = (long long)mp->m_sb.sb_ifree; lcounter += delta; @@ -1288,8 +1297,9 @@ xfs_mod_incore_sb( int status; #ifdef HAVE_PERCPU_SB - ASSERT(field < XFS_SBS_ICOUNT || field > XFS_SBS_FDBLOCKS); + ASSERT(field < XFS_SBS_IFREE || field > XFS_SBS_FDBLOCKS); #endif + spin_lock(&mp->m_sb_lock); status = xfs_mod_incore_sb_unlocked(mp, field, delta, rsvd); spin_unlock(&mp->m_sb_lock); @@ -1492,7 +1502,6 @@ xfs_icsb_cpu_notify( case CPU_ONLINE: case CPU_ONLINE_FROZEN: xfs_icsb_lock(mp); - xfs_icsb_balance_counter(mp, XFS_SBS_ICOUNT, 0); xfs_icsb_balance_counter(mp, XFS_SBS_IFREE, 0); xfs_icsb_balance_counter(mp, XFS_SBS_FDBLOCKS, 0); xfs_icsb_unlock(mp); @@ -1504,17 +1513,14 @@ xfs_icsb_cpu_notify( * re-enable the counters. */ xfs_icsb_lock(mp); spin_lock(&mp->m_sb_lock); - xfs_icsb_disable_counter(mp, XFS_SBS_ICOUNT); xfs_icsb_disable_counter(mp, XFS_SBS_IFREE); xfs_icsb_disable_counter(mp, XFS_SBS_FDBLOCKS); - mp->m_sb.sb_icount += cntp->icsb_icount; mp->m_sb.sb_ifree += cntp->icsb_ifree; mp->m_sb.sb_fdblocks += cntp->icsb_fdblocks; memset(cntp, 0, sizeof(xfs_icsb_cnts_t)); - xfs_icsb_balance_counter_locked(mp, XFS_SBS_ICOUNT, 0); xfs_icsb_balance_counter_locked(mp, XFS_SBS_IFREE, 0); xfs_icsb_balance_counter_locked(mp, XFS_SBS_FDBLOCKS, 0); spin_unlock(&mp->m_sb_lock); @@ -1531,11 +1537,18 @@ xfs_icsb_init_counters( xfs_mount_t *mp) { xfs_icsb_cnts_t *cntp; + int error; int i; + error = percpu_counter_init(&mp->m_icount, 0, GFP_KERNEL); + if (error) + return error; + mp->m_sb_cnts = alloc_percpu(xfs_icsb_cnts_t); - if (mp->m_sb_cnts == NULL) + if (!mp->m_sb_cnts) { + percpu_counter_destroy(&mp->m_icount); return -ENOMEM; + } for_each_online_cpu(i) { cntp = (xfs_icsb_cnts_t *)per_cpu_ptr(mp->m_sb_cnts, i); @@ -1563,13 +1576,14 @@ void xfs_icsb_reinit_counters( xfs_mount_t *mp) { + percpu_counter_set(&mp->m_icount, mp->m_sb.sb_icount); + xfs_icsb_lock(mp); /* * start with all counters disabled so that the * initial balance kicks us off correctly */ mp->m_icsb_counters = -1; - xfs_icsb_balance_counter(mp, XFS_SBS_ICOUNT, 0); xfs_icsb_balance_counter(mp, XFS_SBS_IFREE, 0); xfs_icsb_balance_counter(mp, XFS_SBS_FDBLOCKS, 0); xfs_icsb_unlock(mp); @@ -1583,6 +1597,9 @@ xfs_icsb_destroy_counters( unregister_hotcpu_notifier(&mp->m_icsb_notifier); free_percpu(mp->m_sb_cnts); } + + percpu_counter_destroy(&mp->m_icount); + mutex_destroy(&mp->m_icsb_mutex); } @@ -1645,7 +1662,6 @@ xfs_icsb_count( for_each_online_cpu(i) { cntp = (xfs_icsb_cnts_t *)per_cpu_ptr(mp->m_sb_cnts, i); - cnt->icsb_icount += cntp->icsb_icount; cnt->icsb_ifree += cntp->icsb_ifree; cnt->icsb_fdblocks += cntp->icsb_fdblocks; } @@ -1659,7 +1675,7 @@ xfs_icsb_counter_disabled( xfs_mount_t *mp, xfs_sb_field_t field) { - ASSERT((field >= XFS_SBS_ICOUNT) && (field <= XFS_SBS_FDBLOCKS)); + ASSERT((field >= XFS_SBS_IFREE) && (field <= XFS_SBS_FDBLOCKS)); return test_bit(field, &mp->m_icsb_counters); } @@ -1670,7 +1686,7 @@ xfs_icsb_disable_counter( { xfs_icsb_cnts_t cnt; - ASSERT((field >= XFS_SBS_ICOUNT) && (field <= XFS_SBS_FDBLOCKS)); + ASSERT((field >= XFS_SBS_IFREE) && (field <= XFS_SBS_FDBLOCKS)); /* * If we are already disabled, then there is nothing to do @@ -1689,9 +1705,6 @@ xfs_icsb_disable_counter( xfs_icsb_count(mp, &cnt, XFS_ICSB_LAZY_COUNT); switch(field) { - case XFS_SBS_ICOUNT: - mp->m_sb.sb_icount = cnt.icsb_icount; - break; case XFS_SBS_IFREE: mp->m_sb.sb_ifree = cnt.icsb_ifree; break; @@ -1716,15 +1729,12 @@ xfs_icsb_enable_counter( xfs_icsb_cnts_t *cntp; int i; - ASSERT((field >= XFS_SBS_ICOUNT) && (field <= XFS_SBS_FDBLOCKS)); + ASSERT((field >= XFS_SBS_IFREE) && (field <= XFS_SBS_FDBLOCKS)); xfs_icsb_lock_all_counters(mp); for_each_online_cpu(i) { cntp = per_cpu_ptr(mp->m_sb_cnts, i); switch (field) { - case XFS_SBS_ICOUNT: - cntp->icsb_icount = count + resid; - break; case XFS_SBS_IFREE: cntp->icsb_ifree = count + resid; break; @@ -1750,8 +1760,6 @@ xfs_icsb_sync_counters_locked( xfs_icsb_count(mp, &cnt, flags); - if (!xfs_icsb_counter_disabled(mp, XFS_SBS_ICOUNT)) - mp->m_sb.sb_icount = cnt.icsb_icount; if (!xfs_icsb_counter_disabled(mp, XFS_SBS_IFREE)) mp->m_sb.sb_ifree = cnt.icsb_ifree; if (!xfs_icsb_counter_disabled(mp, XFS_SBS_FDBLOCKS)) @@ -1805,12 +1813,6 @@ xfs_icsb_balance_counter_locked( /* update counters - first CPU gets residual*/ switch (field) { - case XFS_SBS_ICOUNT: - count = mp->m_sb.sb_icount; - resid = do_div(count, weight); - if (count < max(min, XFS_ICSB_INO_CNTR_REENABLE)) - return; - break; case XFS_SBS_IFREE: count = mp->m_sb.sb_ifree; resid = do_div(count, weight); @@ -1871,14 +1873,6 @@ again: } switch (field) { - case XFS_SBS_ICOUNT: - lcounter = icsbp->icsb_icount; - lcounter += delta; - if (unlikely(lcounter < 0)) - goto balance_counter; - icsbp->icsb_icount = lcounter; - break; - case XFS_SBS_IFREE: lcounter = icsbp->icsb_ifree; lcounter += delta; diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h index 0d8abd6..76b18c8 100644 --- a/fs/xfs/xfs_mount.h +++ b/fs/xfs/xfs_mount.h @@ -41,7 +41,6 @@ struct xfs_da_geometry; typedef struct xfs_icsb_cnts { uint64_t icsb_fdblocks; uint64_t icsb_ifree; - uint64_t icsb_icount; unsigned long icsb_flags; } xfs_icsb_cnts_t; @@ -81,8 +80,11 @@ typedef struct xfs_mount { struct super_block *m_super; xfs_tid_t m_tid; /* next unused tid for fs */ struct xfs_ail *m_ail; /* fs active log item list */ - xfs_sb_t m_sb; /* copy of fs superblock */ + + struct xfs_sb m_sb; /* copy of fs superblock */ spinlock_t m_sb_lock; /* sb counter lock */ + struct percpu_counter m_icount; /* allocated inodes counter */ + struct xfs_buf *m_sb_bp; /* buffer for superblock */ char *m_fsname; /* filesystem name */ int m_fsname_len; /* strlen of fs name */ @@ -388,6 +390,7 @@ 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_mount_log_sb(xfs_mount_t *); extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int); extern int xfs_readsb(xfs_mount_t *, int); diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c index 8fcc4cc..0aa4428 100644 --- a/fs/xfs/xfs_super.c +++ b/fs/xfs/xfs_super.c @@ -1085,6 +1085,7 @@ xfs_fs_statfs( xfs_sb_t *sbp = &mp->m_sb; struct xfs_inode *ip = XFS_I(dentry->d_inode); __uint64_t fakeinos, id; + __uint64_t icount; xfs_extlen_t lsize; __int64_t ffree; @@ -1096,6 +1097,7 @@ xfs_fs_statfs( statp->f_fsid.val[1] = (u32)(id >> 32); xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT); + icount = percpu_counter_sum(&mp->m_icount); spin_lock(&mp->m_sb_lock); statp->f_bsize = sbp->sb_blocksize; @@ -1104,8 +1106,7 @@ xfs_fs_statfs( statp->f_bfree = statp->f_bavail = sbp->sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); fakeinos = statp->f_bfree << sbp->sb_inopblog; - statp->f_files = - MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER); + statp->f_files = MIN(icount + fakeinos, (__uint64_t)XFS_MAXINUMBER); if (mp->m_maxicount) statp->f_files = min_t(typeof(statp->f_files), statp->f_files, @@ -1117,7 +1118,7 @@ xfs_fs_statfs( sbp->sb_icount); /* make sure statp->f_ffree does not underflow */ - ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree); + ffree = statp->f_files - (icount - sbp->sb_ifree); statp->f_ffree = max_t(__int64_t, ffree, 0); spin_unlock(&mp->m_sb_lock); diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c index eb90cd5..9bc742b 100644 --- a/fs/xfs/xfs_trans.c +++ b/fs/xfs/xfs_trans.c @@ -554,8 +554,7 @@ xfs_trans_unreserve_and_mod_sb( } if (idelta) { - error = xfs_icsb_modify_counters(mp, XFS_SBS_ICOUNT, - idelta, rsvd); + error = xfs_mod_icount(mp, idelta); if (error) goto out_undo_fdblocks; } @@ -634,7 +633,7 @@ out_undo_ifreecount: xfs_icsb_modify_counters(mp, XFS_SBS_IFREE, -ifreedelta, rsvd); out_undo_icount: if (idelta) - xfs_icsb_modify_counters(mp, XFS_SBS_ICOUNT, -idelta, rsvd); + xfs_mod_icount(mp, -idelta); out_undo_fdblocks: if (blkdelta) xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, -blkdelta, rsvd); |