From e4d174260779ff0e2dc5de951c2e235721b02b05 Mon Sep 17 00:00:00 2001 From: Dave Chinner Date: Mon, 13 Feb 2023 09:14:54 +1100 Subject: [PATCH] xfs: move allocation accounting to xfs_alloc_vextent_set_fsbno() Move it from xfs_alloc_ag_vextent() so we can get rid of that layer. Rename xfs_alloc_vextent_set_fsbno() to xfs_alloc_vextent_finish() to indicate that it's function is finishing off the allocation that we've run now that it contains much more functionality. Signed-off-by: Dave Chinner Reviewed-by: Darrick J. Wong --- fs/xfs/libxfs/xfs_alloc.c | 122 ++++++++++++++++++++++++---------------------- 1 file changed, 63 insertions(+), 59 deletions(-) diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c index dc1b6c6..afc6bd4 100644 --- a/fs/xfs/libxfs/xfs_alloc.c +++ b/fs/xfs/libxfs/xfs_alloc.c @@ -1163,36 +1163,6 @@ xfs_alloc_ag_vextent( ASSERT(0); /* NOTREACHED */ } - - if (error || args->agbno == NULLAGBLOCK) - return error; - - ASSERT(args->len >= args->minlen); - ASSERT(args->len <= args->maxlen); - ASSERT(args->agbno % args->alignment == 0); - - /* if not file data, insert new block into the reverse map btree */ - if (!xfs_rmap_should_skip_owner_update(&args->oinfo)) { - error = xfs_rmap_alloc(args->tp, args->agbp, args->pag, - args->agbno, args->len, &args->oinfo); - if (error) - return error; - } - - if (!args->wasfromfl) { - error = xfs_alloc_update_counters(args->tp, args->agbp, - -((long)(args->len))); - if (error) - return error; - - ASSERT(!xfs_extent_busy_search(args->mp, args->pag, - args->agbno, args->len)); - } - - xfs_ag_resv_alloc_extent(args->pag, args->resv, args); - - XFS_STATS_INC(args->mp, xs_allocx); - XFS_STATS_ADD(args->mp, xs_allocb, args->len); return error; } @@ -3237,18 +3207,21 @@ xfs_alloc_vextent_prepare_ag( } /* - * Post-process allocation results to set the allocated block number correctly - * for the caller. + * Post-process allocation results to account for the allocation if it succeed + * and set the allocated block number correctly for the caller. * - * XXX: xfs_alloc_vextent() should really be returning ENOSPC for ENOSPC, not + * XXX: we should really be returning ENOSPC for ENOSPC, not * hiding it behind a "successful" NULLFSBLOCK allocation. */ -static void -xfs_alloc_vextent_set_fsbno( +static int +xfs_alloc_vextent_finish( struct xfs_alloc_arg *args, - xfs_agnumber_t minimum_agno) + xfs_agnumber_t minimum_agno, + int alloc_error, + bool drop_perag) { struct xfs_mount *mp = args->mp; + int error = 0; /* * We can end up here with a locked AGF. If we failed, the caller is @@ -3271,19 +3244,54 @@ xfs_alloc_vextent_set_fsbno( args->agno > minimum_agno)) args->tp->t_highest_agno = args->agno; - /* Allocation failed with ENOSPC if NULLAGBLOCK was returned. */ - if (args->agbno == NULLAGBLOCK) { + /* + * If the allocation failed with an error or we had an ENOSPC result, + * preserve the returned error whilst also marking the allocation result + * as "no extent allocated". This ensures that callers that fail to + * capture the error will still treat it as a failed allocation. + */ + if (alloc_error || args->agbno == NULLAGBLOCK) { args->fsbno = NULLFSBLOCK; - return; + error = alloc_error; + goto out_drop_perag; } args->fsbno = XFS_AGB_TO_FSB(mp, args->agno, args->agbno); -#ifdef DEBUG + ASSERT(args->len >= args->minlen); ASSERT(args->len <= args->maxlen); ASSERT(args->agbno % args->alignment == 0); XFS_AG_CHECK_DADDR(mp, XFS_FSB_TO_DADDR(mp, args->fsbno), args->len); -#endif + + /* if not file data, insert new block into the reverse map btree */ + if (!xfs_rmap_should_skip_owner_update(&args->oinfo)) { + error = xfs_rmap_alloc(args->tp, args->agbp, args->pag, + args->agbno, args->len, &args->oinfo); + if (error) + goto out_drop_perag; + } + + if (!args->wasfromfl) { + error = xfs_alloc_update_counters(args->tp, args->agbp, + -((long)(args->len))); + if (error) + goto out_drop_perag; + + ASSERT(!xfs_extent_busy_search(mp, args->pag, args->agbno, + args->len)); + } + + xfs_ag_resv_alloc_extent(args->pag, args->resv, args); + + XFS_STATS_INC(mp, xs_allocx); + XFS_STATS_ADD(mp, xs_allocb, args->len); + +out_drop_perag: + if (drop_perag) { + xfs_perag_put(args->pag); + args->pag = NULL; + } + return error; } /* @@ -3325,8 +3333,7 @@ xfs_alloc_vextent_this_ag( if (!error && args->agbp) error = xfs_alloc_ag_vextent(args); - xfs_alloc_vextent_set_fsbno(args, minimum_agno); - return error; + return xfs_alloc_vextent_finish(args, minimum_agno, error, false); } /* @@ -3413,10 +3420,10 @@ xfs_alloc_vextent_iterate_ags( xfs_perag_put(args->pag); args->pag = NULL; } - if (args->pag) { - xfs_perag_put(args->pag); - args->pag = NULL; - } + /* + * The perag is left referenced in args for the caller to clean + * up after they've finished the allocation. + */ return error; } @@ -3473,8 +3480,7 @@ xfs_alloc_vextent_start_ag( (mp->m_sb.sb_agcount * rotorstep); } - xfs_alloc_vextent_set_fsbno(args, minimum_agno); - return error; + return xfs_alloc_vextent_finish(args, minimum_agno, error, true); } /* @@ -3507,8 +3513,7 @@ xfs_alloc_vextent_first_ag( args->fsbno = target; error = xfs_alloc_vextent_iterate_ags(args, minimum_agno, start_agno, 0); - xfs_alloc_vextent_set_fsbno(args, minimum_agno); - return error; + return xfs_alloc_vextent_finish(args, minimum_agno, error, true); } /* @@ -3537,6 +3542,7 @@ xfs_alloc_vextent_exact_bno( args->agno = XFS_FSB_TO_AGNO(mp, target); if (minimum_agno > args->agno) { trace_xfs_alloc_vextent_skip_deadlock(args); + args->fsbno = NULLFSBLOCK; return 0; } @@ -3548,8 +3554,7 @@ xfs_alloc_vextent_exact_bno( if (!error && args->agbp) error = xfs_alloc_ag_vextent(args); - xfs_alloc_vextent_set_fsbno(args, minimum_agno); - return 0; + return xfs_alloc_vextent_finish(args, minimum_agno, error, false); } /* @@ -3564,8 +3569,8 @@ xfs_alloc_vextent_near_bno( xfs_fsblock_t target) { struct xfs_mount *mp = args->mp; - bool need_pag = !args->pag; xfs_agnumber_t minimum_agno = 0; + bool needs_perag = args->pag == NULL; int error; if (args->tp->t_highest_agno != NULLAGNUMBER) @@ -3585,6 +3590,9 @@ xfs_alloc_vextent_near_bno( return 0; } + if (needs_perag) + args->pag = xfs_perag_get(mp, args->agno); + args->agbno = XFS_FSB_TO_AGBNO(mp, target); args->type = XFS_ALLOCTYPE_NEAR_BNO; @@ -3592,11 +3600,7 @@ xfs_alloc_vextent_near_bno( if (!error && args->agbp) error = xfs_alloc_ag_vextent(args); - xfs_alloc_vextent_set_fsbno(args, minimum_agno); - if (need_pag) - xfs_perag_put(args->pag); - - return error; + return xfs_alloc_vextent_finish(args, minimum_agno, error, needs_perag); } /* Ensure that the freelist is at full capacity. */ -- 2.7.4