From 319c9e874ac8721acdb6583e3459ef595e5ed0a6 Mon Sep 17 00:00:00 2001 From: Dave Chinner Date: Mon, 13 Feb 2023 09:14:53 +1100 Subject: [PATCH] xfs: use xfs_alloc_vextent_first_ag() where appropriate Change obvious callers of single AG allocation to use xfs_alloc_vextent_first_ag(). This gets rid of XFS_ALLOCTYPE_FIRST_AG as the type used within xfs_alloc_vextent_first_ag() during iteration is _THIS_AG. Hence we can remove the setting of args->type from all the callers of _first_ag() and remove the alloctype. While doing this, pass the allocation target fsb as a parameter rather than encoding it in args->fsbno. This starts the process of making args->fsbno an output only variable rather than input/output. Signed-off-by: Dave Chinner Reviewed-by: Darrick J. Wong --- fs/xfs/libxfs/xfs_alloc.c | 33 ++++++++++++++++++--------------- fs/xfs/libxfs/xfs_alloc.h | 10 ++++++++-- fs/xfs/libxfs/xfs_bmap.c | 31 ++++++++++++++++--------------- 3 files changed, 42 insertions(+), 32 deletions(-) diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c index 7e4452c..bd77e64 100644 --- a/fs/xfs/libxfs/xfs_alloc.c +++ b/fs/xfs/libxfs/xfs_alloc.c @@ -3183,7 +3183,8 @@ xfs_alloc_read_agf( */ static int xfs_alloc_vextent_check_args( - struct xfs_alloc_arg *args) + struct xfs_alloc_arg *args, + xfs_fsblock_t target) { struct xfs_mount *mp = args->mp; xfs_agblock_t agsize; @@ -3201,13 +3202,13 @@ xfs_alloc_vextent_check_args( args->maxlen = agsize; if (args->alignment == 0) args->alignment = 1; - ASSERT(XFS_FSB_TO_AGNO(mp, args->fsbno) < mp->m_sb.sb_agcount); - ASSERT(XFS_FSB_TO_AGBNO(mp, args->fsbno) < agsize); + ASSERT(XFS_FSB_TO_AGNO(mp, target) < mp->m_sb.sb_agcount); + ASSERT(XFS_FSB_TO_AGBNO(mp, target) < agsize); ASSERT(args->minlen <= args->maxlen); ASSERT(args->minlen <= agsize); ASSERT(args->mod < args->prod); - if (XFS_FSB_TO_AGNO(mp, args->fsbno) >= mp->m_sb.sb_agcount || - XFS_FSB_TO_AGBNO(mp, args->fsbno) >= agsize || + if (XFS_FSB_TO_AGNO(mp, target) >= mp->m_sb.sb_agcount || + XFS_FSB_TO_AGBNO(mp, target) >= agsize || args->minlen > args->maxlen || args->minlen > agsize || args->mod >= args->prod) { args->fsbno = NULLFSBLOCK; @@ -3281,7 +3282,7 @@ xfs_alloc_vextent_this_ag( if (args->tp->t_highest_agno != NULLAGNUMBER) minimum_agno = args->tp->t_highest_agno; - error = xfs_alloc_vextent_check_args(args); + error = xfs_alloc_vextent_check_args(args, args->fsbno); if (error) { if (error == -ENOSPC) return 0; @@ -3406,7 +3407,7 @@ xfs_alloc_vextent_start_ag( bool bump_rotor = false; int error; - error = xfs_alloc_vextent_check_args(args); + error = xfs_alloc_vextent_check_args(args, args->fsbno); if (error) { if (error == -ENOSPC) return 0; @@ -3444,25 +3445,29 @@ xfs_alloc_vextent_start_ag( * filesystem attempting blocking allocation. This does not wrap or try a second * pass, so will not recurse into AGs lower than indicated by fsbno. */ -static int +int xfs_alloc_vextent_first_ag( struct xfs_alloc_arg *args, - xfs_agnumber_t minimum_agno) -{ + xfs_fsblock_t target) + { struct xfs_mount *mp = args->mp; + xfs_agnumber_t minimum_agno = 0; xfs_agnumber_t start_agno; int error; - error = xfs_alloc_vextent_check_args(args); + if (args->tp->t_highest_agno != NULLAGNUMBER) + minimum_agno = args->tp->t_highest_agno; + + error = xfs_alloc_vextent_check_args(args, target); if (error) { if (error == -ENOSPC) return 0; return error; } - start_agno = max(minimum_agno, XFS_FSB_TO_AGNO(mp, args->fsbno)); - + start_agno = max(minimum_agno, XFS_FSB_TO_AGNO(mp, target)); args->type = XFS_ALLOCTYPE_THIS_AG; + args->fsbno = target; error = xfs_alloc_vextent_iterate_ags(args, minimum_agno, start_agno, 0); xfs_alloc_vextent_set_fsbno(args, minimum_agno); @@ -3495,8 +3500,6 @@ xfs_alloc_vextent( break; case XFS_ALLOCTYPE_START_BNO: return xfs_alloc_vextent_start_ag(args, minimum_agno); - case XFS_ALLOCTYPE_FIRST_AG: - return xfs_alloc_vextent_first_ag(args, minimum_agno); default: error = -EFSCORRUPTED; ASSERT(0); diff --git a/fs/xfs/libxfs/xfs_alloc.h b/fs/xfs/libxfs/xfs_alloc.h index 0a9ad6c..9be46f4 100644 --- a/fs/xfs/libxfs/xfs_alloc.h +++ b/fs/xfs/libxfs/xfs_alloc.h @@ -19,7 +19,6 @@ unsigned int xfs_agfl_size(struct xfs_mount *mp); /* * Freespace allocation types. Argument to xfs_alloc_[v]extent. */ -#define XFS_ALLOCTYPE_FIRST_AG 0x02 /* ... start at ag 0 */ #define XFS_ALLOCTYPE_THIS_AG 0x08 /* anywhere in this a.g. */ #define XFS_ALLOCTYPE_START_BNO 0x10 /* near this block else anywhere */ #define XFS_ALLOCTYPE_NEAR_BNO 0x20 /* in this a.g. and near this block */ @@ -29,7 +28,6 @@ unsigned int xfs_agfl_size(struct xfs_mount *mp); typedef unsigned int xfs_alloctype_t; #define XFS_ALLOC_TYPES \ - { XFS_ALLOCTYPE_FIRST_AG, "FIRST_AG" }, \ { XFS_ALLOCTYPE_THIS_AG, "THIS_AG" }, \ { XFS_ALLOCTYPE_START_BNO, "START_BNO" }, \ { XFS_ALLOCTYPE_NEAR_BNO, "NEAR_BNO" }, \ @@ -131,6 +129,14 @@ xfs_alloc_vextent( int xfs_alloc_vextent_this_ag(struct xfs_alloc_arg *args); /* + * Iterate from the AG indicated from args->fsbno through to the end of the + * filesystem attempting blocking allocation. This is for use in last + * resort allocation attempts when everything else has failed. + */ +int xfs_alloc_vextent_first_ag(struct xfs_alloc_arg *args, + xfs_fsblock_t target); + +/* * Free an extent. */ int /* error */ diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c index a28d57b..efca40f 100644 --- a/fs/xfs/libxfs/xfs_bmap.c +++ b/fs/xfs/libxfs/xfs_bmap.c @@ -3248,13 +3248,6 @@ xfs_bmap_btalloc_filestreams( int notinit = 0; int error; - if (ap->tp->t_flags & XFS_TRANS_LOWMODE) { - args->type = XFS_ALLOCTYPE_FIRST_AG; - args->total = ap->minlen; - args->minlen = ap->minlen; - return 0; - } - args->type = XFS_ALLOCTYPE_NEAR_BNO; args->total = ap->total; @@ -3462,9 +3455,7 @@ xfs_bmap_exact_minlen_extent_alloc( */ ap->blkno = XFS_AGB_TO_FSB(mp, 0, 0); - args.fsbno = ap->blkno; args.oinfo = XFS_RMAP_OINFO_SKIP_UPDATE; - args.type = XFS_ALLOCTYPE_FIRST_AG; args.minlen = args.maxlen = ap->minlen; args.total = ap->total; @@ -3476,7 +3467,7 @@ xfs_bmap_exact_minlen_extent_alloc( args.resv = XFS_AG_RESV_NONE; args.datatype = ap->datatype; - error = xfs_alloc_vextent(&args); + error = xfs_alloc_vextent_first_ag(&args, ap->blkno); if (error) return error; @@ -3623,10 +3614,21 @@ xfs_bmap_btalloc_best_length( * size to the largest space found. */ if ((ap->datatype & XFS_ALLOC_USERDATA) && - xfs_inode_is_filestream(ap->ip)) + xfs_inode_is_filestream(ap->ip)) { + /* + * If there is very little free space before we start a + * filestreams allocation, we're almost guaranteed to fail to + * find an AG with enough contiguous free space to succeed, so + * just go straight to the low space algorithm. + */ + if (ap->tp->t_flags & XFS_TRANS_LOWMODE) { + args->minlen = ap->minlen; + goto critically_low_space; + } error = xfs_bmap_btalloc_filestreams(ap, args, &blen); - else + } else { error = xfs_bmap_btalloc_select_lengths(ap, args, &blen); + } if (error) return error; @@ -3673,10 +3675,9 @@ xfs_bmap_btalloc_best_length( * so they don't waste time on allocation modes that are unlikely to * succeed. */ - args->fsbno = 0; - args->type = XFS_ALLOCTYPE_FIRST_AG; +critically_low_space: args->total = ap->minlen; - error = xfs_alloc_vextent(args); + error = xfs_alloc_vextent_first_ag(args, 0); if (error) return error; ap->tp->t_flags |= XFS_TRANS_LOWMODE; -- 2.7.4