diff options
Diffstat (limited to 'fs/xfs')
| -rw-r--r-- | fs/xfs/xfs_alloc.c | 125 |
1 files changed, 66 insertions, 59 deletions
diff --git a/fs/xfs/xfs_alloc.c b/fs/xfs/xfs_alloc.c index b5af10713dc..4bc3c649aee 100644 --- a/fs/xfs/xfs_alloc.c +++ b/fs/xfs/xfs_alloc.c @@ -463,6 +463,27 @@ xfs_alloc_read_agfl( return 0; } +STATIC int +xfs_alloc_update_counters( + struct xfs_trans *tp, + struct xfs_perag *pag, + struct xfs_buf *agbp, + long len) +{ + struct xfs_agf *agf = XFS_BUF_TO_AGF(agbp); + + pag->pagf_freeblks += len; + be32_add_cpu(&agf->agf_freeblks, len); + + xfs_trans_agblocks_delta(tp, len); + if (unlikely(be32_to_cpu(agf->agf_freeblks) > + be32_to_cpu(agf->agf_length))) + return EFSCORRUPTED; + + xfs_alloc_log_agf(tp, agbp, XFS_AGF_FREEBLKS); + return 0; +} + /* * Allocation group level functions. */ @@ -504,49 +525,44 @@ xfs_alloc_ag_vextent( ASSERT(0); /* NOTREACHED */ } - if (error) + + if (error || args->agbno == NULLAGBLOCK) return error; - /* - * If the allocation worked, need to change the agf structure - * (and log it), and the superblock. - */ - if (args->agbno != NULLAGBLOCK) { - xfs_agf_t *agf; /* allocation group freelist header */ - long slen = (long)args->len; - ASSERT(args->len >= args->minlen && args->len <= args->maxlen); - ASSERT(!(args->wasfromfl) || !args->isfl); - ASSERT(args->agbno % args->alignment == 0); - if (!(args->wasfromfl)) { + ASSERT(args->len >= args->minlen); + ASSERT(args->len <= args->maxlen); + ASSERT(!args->wasfromfl || !args->isfl); + ASSERT(args->agbno % args->alignment == 0); - agf = XFS_BUF_TO_AGF(args->agbp); - be32_add_cpu(&agf->agf_freeblks, -(args->len)); - xfs_trans_agblocks_delta(args->tp, - -((long)(args->len))); - args->pag->pagf_freeblks -= args->len; - ASSERT(be32_to_cpu(agf->agf_freeblks) <= - be32_to_cpu(agf->agf_length)); - xfs_alloc_log_agf(args->tp, args->agbp, - XFS_AGF_FREEBLKS); - /* - * Search the busylist for these blocks and mark the - * transaction as synchronous if blocks are found. This - * avoids the need to block due to a synchronous log - * force to ensure correct ordering as the synchronous - * transaction will guarantee that for us. - */ - if (xfs_alloc_busy_search(args->mp, args->agno, - args->agbno, args->len)) - xfs_trans_set_sync(args->tp); - } - if (!args->isfl) - xfs_trans_mod_sb(args->tp, - args->wasdel ? XFS_TRANS_SB_RES_FDBLOCKS : - XFS_TRANS_SB_FDBLOCKS, -slen); - XFS_STATS_INC(xs_allocx); - XFS_STATS_ADD(xs_allocb, args->len); + if (!args->wasfromfl) { + error = xfs_alloc_update_counters(args->tp, args->pag, + args->agbp, + -((long)(args->len))); + if (error) + return error; + + /* + * Search the busylist for these blocks and mark the + * transaction as synchronous if blocks are found. This + * avoids the need to block due to a synchronous log + * force to ensure correct ordering as the synchronous + * transaction will guarantee that for us. + */ + if (xfs_alloc_busy_search(args->mp, args->agno, + args->agbno, args->len)) + xfs_trans_set_sync(args->tp); } - return 0; + + if (!args->isfl) { + xfs_trans_mod_sb(args->tp, args->wasdel ? + XFS_TRANS_SB_RES_FDBLOCKS : + XFS_TRANS_SB_FDBLOCKS, + -((long)(args->len))); + } + + XFS_STATS_INC(xs_allocx); + XFS_STATS_ADD(xs_allocb, args->len); + return error; } /* @@ -1385,6 +1401,7 @@ xfs_free_ag_extent( xfs_mount_t *mp; /* mount point struct for filesystem */ xfs_agblock_t nbno; /* new starting block of freespace */ xfs_extlen_t nlen; /* new length of freespace */ + xfs_perag_t *pag; /* per allocation group data */ mp = tp->t_mountp; /* @@ -1583,30 +1600,20 @@ xfs_free_ag_extent( XFS_WANT_CORRUPTED_GOTO(i == 1, error0); xfs_btree_del_cursor(cnt_cur, XFS_BTREE_NOERROR); cnt_cur = NULL; + /* * Update the freespace totals in the ag and superblock. */ - { - xfs_agf_t *agf; - xfs_perag_t *pag; /* per allocation group data */ - - pag = xfs_perag_get(mp, agno); - pag->pagf_freeblks += len; - xfs_perag_put(pag); + pag = xfs_perag_get(mp, agno); + error = xfs_alloc_update_counters(tp, pag, agbp, len); + xfs_perag_put(pag); + if (error) + goto error0; - agf = XFS_BUF_TO_AGF(agbp); - be32_add_cpu(&agf->agf_freeblks, len); - xfs_trans_agblocks_delta(tp, len); - XFS_WANT_CORRUPTED_GOTO( - be32_to_cpu(agf->agf_freeblks) <= - be32_to_cpu(agf->agf_length), - error0); - xfs_alloc_log_agf(tp, agbp, XFS_AGF_FREEBLKS); - if (!isfl) - xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, (long)len); - XFS_STATS_INC(xs_freex); - XFS_STATS_ADD(xs_freeb, len); - } + if (!isfl) + xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, (long)len); + XFS_STATS_INC(xs_freex); + XFS_STATS_ADD(xs_freeb, len); trace_xfs_free_extent(mp, agno, bno, len, isfl, haveleft, haveright); |