diff options
Diffstat (limited to 'fs')
73 files changed, 10557 insertions, 308 deletions
diff --git a/fs/open.c b/fs/open.c index a7719cfb7257..d3ed8171e8e0 100644 --- a/fs/open.c +++ b/fs/open.c @@ -267,6 +267,11 @@ int vfs_fallocate(struct file *file, int mode, loff_t offset, loff_t len) (mode & ~FALLOC_FL_INSERT_RANGE)) return -EINVAL; + /* Unshare range should only be used with allocate mode. */ + if ((mode & FALLOC_FL_UNSHARE_RANGE) && + (mode & ~(FALLOC_FL_UNSHARE_RANGE | FALLOC_FL_KEEP_SIZE))) + return -EINVAL; + if (!(file->f_mode & FMODE_WRITE)) return -EBADF; diff --git a/fs/xfs/Makefile b/fs/xfs/Makefile index 584e87e11cb6..26ef1958b65b 100644 --- a/fs/xfs/Makefile +++ b/fs/xfs/Makefile @@ -55,6 +55,8 @@ xfs-y += $(addprefix libxfs/, \ xfs_ag_resv.o \ xfs_rmap.o \ xfs_rmap_btree.o \ + xfs_refcount.o \ + xfs_refcount_btree.o \ xfs_sb.o \ xfs_symlink_remote.o \ xfs_trans_resv.o \ @@ -88,6 +90,7 @@ xfs-y += xfs_aops.o \ xfs_message.o \ xfs_mount.o \ xfs_mru_cache.o \ + xfs_reflink.o \ xfs_stats.o \ xfs_super.o \ xfs_symlink.o \ @@ -100,16 +103,20 @@ xfs-y += xfs_aops.o \ # low-level transaction/log code xfs-y += xfs_log.o \ xfs_log_cil.o \ + xfs_bmap_item.o \ xfs_buf_item.o \ xfs_extfree_item.o \ xfs_icreate_item.o \ xfs_inode_item.o \ + xfs_refcount_item.o \ xfs_rmap_item.o \ xfs_log_recover.o \ xfs_trans_ail.o \ + xfs_trans_bmap.o \ xfs_trans_buf.o \ xfs_trans_extfree.o \ xfs_trans_inode.o \ + xfs_trans_refcount.o \ xfs_trans_rmap.o \ # optional features diff --git a/fs/xfs/libxfs/xfs_ag_resv.c b/fs/xfs/libxfs/xfs_ag_resv.c index e3ae0f2b4294..e5ebc3770460 100644 --- a/fs/xfs/libxfs/xfs_ag_resv.c +++ b/fs/xfs/libxfs/xfs_ag_resv.c @@ -38,6 +38,7 @@ #include "xfs_trans_space.h" #include "xfs_rmap_btree.h" #include "xfs_btree.h" +#include "xfs_refcount_btree.h" /* * Per-AG Block Reservations @@ -108,7 +109,9 @@ xfs_ag_resv_critical( trace_xfs_ag_resv_critical(pag, type, avail); /* Critically low if less than 10% or max btree height remains. */ - return avail < orig / 10 || avail < XFS_BTREE_MAXLEVELS; + return XFS_TEST_ERROR(avail < orig / 10 || avail < XFS_BTREE_MAXLEVELS, + pag->pag_mount, XFS_ERRTAG_AG_RESV_CRITICAL, + XFS_RANDOM_AG_RESV_CRITICAL); } /* @@ -228,6 +231,11 @@ xfs_ag_resv_init( if (pag->pag_meta_resv.ar_asked == 0) { ask = used = 0; + error = xfs_refcountbt_calc_reserves(pag->pag_mount, + pag->pag_agno, &ask, &used); + if (error) + goto out; + error = __xfs_ag_resv_init(pag, XFS_AG_RESV_METADATA, ask, used); if (error) @@ -238,6 +246,11 @@ xfs_ag_resv_init( if (pag->pag_agfl_resv.ar_asked == 0) { ask = used = 0; + error = xfs_rmapbt_calc_reserves(pag->pag_mount, pag->pag_agno, + &ask, &used); + if (error) + goto out; + error = __xfs_ag_resv_init(pag, XFS_AG_RESV_AGFL, ask, used); if (error) goto out; diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c index ca75dc90ebe0..effb64cf714f 100644 --- a/fs/xfs/libxfs/xfs_alloc.c +++ b/fs/xfs/libxfs/xfs_alloc.c @@ -52,10 +52,23 @@ STATIC int xfs_alloc_ag_vextent_size(xfs_alloc_arg_t *); STATIC int xfs_alloc_ag_vextent_small(xfs_alloc_arg_t *, xfs_btree_cur_t *, xfs_agblock_t *, xfs_extlen_t *, int *); +unsigned int +xfs_refc_block( + struct xfs_mount *mp) +{ + if (xfs_sb_version_hasrmapbt(&mp->m_sb)) + return XFS_RMAP_BLOCK(mp) + 1; + if (xfs_sb_version_hasfinobt(&mp->m_sb)) + return XFS_FIBT_BLOCK(mp) + 1; + return XFS_IBT_BLOCK(mp) + 1; +} + xfs_extlen_t xfs_prealloc_blocks( struct xfs_mount *mp) { + if (xfs_sb_version_hasreflink(&mp->m_sb)) + return xfs_refc_block(mp) + 1; if (xfs_sb_version_hasrmapbt(&mp->m_sb)) return XFS_RMAP_BLOCK(mp) + 1; if (xfs_sb_version_hasfinobt(&mp->m_sb)) @@ -115,6 +128,8 @@ xfs_alloc_ag_max_usable( blocks++; /* finobt root block */ if (xfs_sb_version_hasrmapbt(&mp->m_sb)) blocks++; /* rmap root block */ + if (xfs_sb_version_hasreflink(&mp->m_sb)) + blocks++; /* refcount root block */ return mp->m_sb.sb_agblocks - blocks; } @@ -2321,6 +2336,9 @@ xfs_alloc_log_agf( offsetof(xfs_agf_t, agf_btreeblks), offsetof(xfs_agf_t, agf_uuid), offsetof(xfs_agf_t, agf_rmap_blocks), + offsetof(xfs_agf_t, agf_refcount_blocks), + offsetof(xfs_agf_t, agf_refcount_root), + offsetof(xfs_agf_t, agf_refcount_level), /* needed so that we don't log the whole rest of the structure: */ offsetof(xfs_agf_t, agf_spare64), sizeof(xfs_agf_t) @@ -2458,6 +2476,10 @@ xfs_agf_verify( be32_to_cpu(agf->agf_btreeblks) > be32_to_cpu(agf->agf_length)) return false; + if (xfs_sb_version_hasreflink(&mp->m_sb) && + be32_to_cpu(agf->agf_refcount_level) > XFS_BTREE_MAXLEVELS) + return false; + return true;; } @@ -2578,6 +2600,7 @@ xfs_alloc_read_agf( be32_to_cpu(agf->agf_levels[XFS_BTNUM_CNTi]); pag->pagf_levels[XFS_BTNUM_RMAPi] = be32_to_cpu(agf->agf_levels[XFS_BTNUM_RMAPi]); + pag->pagf_refcount_level = be32_to_cpu(agf->agf_refcount_level); spin_lock_init(&pag->pagb_lock); pag->pagb_count = 0; pag->pagb_tree = RB_ROOT; diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c index 9d7f61d36645..c27344cf38e1 100644 --- a/fs/xfs/libxfs/xfs_bmap.c +++ b/fs/xfs/libxfs/xfs_bmap.c @@ -48,6 +48,7 @@ #include "xfs_filestream.h" #include "xfs_rmap.h" #include "xfs_ag_resv.h" +#include "xfs_refcount.h" kmem_zone_t *xfs_bmap_free_item_zone; @@ -140,7 +141,8 @@ xfs_bmbt_lookup_ge( */ static inline bool xfs_bmap_needs_btree(struct xfs_inode *ip, int whichfork) { - return XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS && + return whichfork != XFS_COW_FORK && + XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS && XFS_IFORK_NEXTENTS(ip, whichfork) > XFS_IFORK_MAXEXT(ip, whichfork); } @@ -150,7 +152,8 @@ static inline bool xfs_bmap_needs_btree(struct xfs_inode *ip, int whichfork) */ static inline bool xfs_bmap_wants_extents(struct xfs_inode *ip, int whichfork) { - return XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE && + return whichfork != XFS_COW_FORK && + XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE && XFS_IFORK_NEXTENTS(ip, whichfork) <= XFS_IFORK_MAXEXT(ip, whichfork); } @@ -640,6 +643,7 @@ xfs_bmap_btree_to_extents( mp = ip->i_mount; ifp = XFS_IFORK_PTR(ip, whichfork); + ASSERT(whichfork != XFS_COW_FORK); ASSERT(ifp->if_flags & XFS_IFEXTENTS); ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE); rblock = ifp->if_broot; @@ -706,6 +710,7 @@ xfs_bmap_extents_to_btree( xfs_bmbt_ptr_t *pp; /* root block address pointer */ mp = ip->i_mount; + ASSERT(whichfork != XFS_COW_FORK); ifp = XFS_IFORK_PTR(ip, whichfork); ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS); @@ -748,6 +753,7 @@ xfs_bmap_extents_to_btree( args.type = XFS_ALLOCTYPE_START_BNO; args.fsbno = XFS_INO_TO_FSB(mp, ip->i_ino); } else if (dfops->dop_low) { +try_another_ag: args.type = XFS_ALLOCTYPE_START_BNO; args.fsbno = *firstblock; } else { @@ -762,6 +768,21 @@ xfs_bmap_extents_to_btree( xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); return error; } + + /* + * During a CoW operation, the allocation and bmbt updates occur in + * different transactions. The mapping code tries to put new bmbt + * blocks near extents being mapped, but the only way to guarantee this + * is if the alloc and the mapping happen in a single transaction that + * has a block reservation. That isn't the case here, so if we run out + * of space we'll try again with another AG. + */ + if (xfs_sb_version_hasreflink(&cur->bc_mp->m_sb) && + args.fsbno == NULLFSBLOCK && + args.type == XFS_ALLOCTYPE_NEAR_BNO) { + dfops->dop_low = true; + goto try_another_ag; + } /* * Allocation can't fail, the space was reserved. */ @@ -837,6 +858,7 @@ xfs_bmap_local_to_extents_empty( { struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); + ASSERT(whichfork != XFS_COW_FORK); ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL); ASSERT(ifp->if_bytes == 0); ASSERT(XFS_IFORK_NEXTENTS(ip, whichfork) == 0); @@ -896,6 +918,7 @@ xfs_bmap_local_to_extents( * file currently fits in an inode. */ if (*firstblock == NULLFSBLOCK) { +try_another_ag: args.fsbno = XFS_INO_TO_FSB(args.mp, ip->i_ino); args.type = XFS_ALLOCTYPE_START_BNO; } else { @@ -908,6 +931,19 @@ xfs_bmap_local_to_extents( if (error) goto done; + /* + * During a CoW operation, the allocation and bmbt updates occur in + * different transactions. The mapping code tries to put new bmbt + * blocks near extents being mapped, but the only way to guarantee this + * is if the alloc and the mapping happen in a single transaction that + * has a block reservation. That isn't the case here, so if we run out + * of space we'll try again with another AG. + */ + if (xfs_sb_version_hasreflink(&ip->i_mount->m_sb) && + args.fsbno == NULLFSBLOCK && + args.type == XFS_ALLOCTYPE_NEAR_BNO) { + goto try_another_ag; + } /* Can't fail, the space was reserved. */ ASSERT(args.fsbno != NULLFSBLOCK); ASSERT(args.len == 1); @@ -1670,7 +1706,8 @@ xfs_bmap_one_block( */ STATIC int /* error */ xfs_bmap_add_extent_delay_real( - struct xfs_bmalloca *bma) + struct xfs_bmalloca *bma, + int whichfork) { struct xfs_bmbt_irec *new = &bma->got; int diff; /* temp value */ @@ -1688,11 +1725,14 @@ xfs_bmap_add_extent_delay_real( xfs_filblks_t temp=0; /* value for da_new calculations */ xfs_filblks_t temp2=0;/* value for da_new calculations */ int tmp_rval; /* partial logging flags */ - int whichfork = XFS_DATA_FORK; struct xfs_mount *mp; + xfs_extnum_t *nextents; mp = bma->ip->i_mount; ifp = XFS_IFORK_PTR(bma->ip, whichfork); + ASSERT(whichfork != XFS_ATTR_FORK); + nextents = (whichfork == XFS_COW_FORK ? &bma->ip->i_cnextents : + &bma->ip->i_d.di_nextents); ASSERT(bma->idx >= 0); ASSERT(bma->idx <= ifp->if_bytes / sizeof(struct xfs_bmbt_rec)); @@ -1706,6 +1746,9 @@ xfs_bmap_add_extent_delay_real( #define RIGHT r[1] #define PREV r[2] + if (whichfork == XFS_COW_FORK) + state |= BMAP_COWFORK; + /* * Set up a bunch of variables to make the tests simpler. */ @@ -1792,7 +1835,7 @@ xfs_bmap_add_extent_delay_real( trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); xfs_iext_remove(bma->ip, bma->idx + 1, 2, state); - bma->ip->i_d.di_nextents--; + (*nextents)--; if (bma->cur == NULL) rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; else { @@ -1894,7 +1937,7 @@ xfs_bmap_add_extent_delay_real( xfs_bmbt_set_startblock(ep, new->br_startblock); trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); - bma->ip->i_d.di_nextents++; + (*nextents)++; if (bma->cur == NULL) rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; else { @@ -1964,7 +2007,7 @@ xfs_bmap_add_extent_delay_real( temp = PREV.br_blockcount - new->br_blockcount; xfs_bmbt_set_blockcount(ep, temp); xfs_iext_insert(bma->ip, bma->idx, 1, new, state); - bma->ip->i_d.di_nextents++; + (*nextents)++; if (bma->cur == NULL) rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; else { @@ -2048,7 +2091,7 @@ xfs_bmap_add_extent_delay_real( trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); xfs_bmbt_set_blockcount(ep, temp); xfs_iext_insert(bma->ip, bma->idx + 1, 1, new, state); - bma->ip->i_d.di_nextents++; + (*nextents)++; if (bma->cur == NULL) rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; else { @@ -2117,7 +2160,7 @@ xfs_bmap_add_extent_delay_real( RIGHT.br_blockcount = temp2; /* insert LEFT (r[0]) and RIGHT (r[1]) at the same time */ xfs_iext_insert(bma->ip, bma->idx + 1, 2, &LEFT, state); - bma->ip->i_d.di_nextents++; + (*nextents)++; if (bma->cur == NULL) rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; else { @@ -2215,7 +2258,8 @@ xfs_bmap_add_extent_delay_real( xfs_bmap_check_leaf_extents(bma->cur, bma->ip, whichfork); done: - bma->logflags |= rval; + if (whichfork != XFS_COW_FORK) + bma->logflags |= rval; return error; #undef LEFT #undef RIGHT @@ -2759,6 +2803,7 @@ done: STATIC void xfs_bmap_add_extent_hole_delay( xfs_inode_t *ip, /* incore inode pointer */ + int whichfork, xfs_extnum_t *idx, /* extent number to update/insert */ xfs_bmbt_irec_t *new) /* new data to add to file extents */ { @@ -2770,8 +2815,10 @@ xfs_bmap_add_extent_hole_delay( int state; /* state bits, accessed thru macros */ xfs_filblks_t temp=0; /* temp for indirect calculations */ - ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK); + ifp = XFS_IFORK_PTR(ip, whichfork); state = 0; + if (whichfork == XFS_COW_FORK) + state |= BMAP_COWFORK; ASSERT(isnullstartblock(new->br_startblock)); /* @@ -2789,7 +2836,7 @@ xfs_bmap_add_extent_hole_delay( * Check and set flags if the current (right) segment exists. * If it doesn't exist, we're converting the hole at end-of-file. */ - if (*idx < ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t)) { + if (*idx < ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t)) { state |= BMAP_RIGHT_VALID; xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *idx), &right); @@ -2923,6 +2970,7 @@ xfs_bmap_add_extent_hole_real( ASSERT(!isnullstartblock(new->br_startblock)); ASSERT(!bma->cur || !(bma->cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL)); + ASSERT(whichfork != XFS_COW_FORK); XFS_STATS_INC(mp, xs_add_exlist); @@ -3648,7 +3696,9 @@ xfs_bmap_btalloc( else if (mp->m_dalign) stripe_align = mp->m_dalign; - if (xfs_alloc_is_userdata(ap->datatype)) + if (ap->flags & XFS_BMAPI_COWFORK) + align = xfs_get_cowextsz_hint(ap->ip); + else if (xfs_alloc_is_userdata(ap->datatype)) align = xfs_get_extsz_hint(ap->ip); if (unlikely(align)) { error = xfs_bmap_extsize_align(mp, &ap->got, &ap->prev, @@ -3856,7 +3906,8 @@ xfs_bmap_btalloc( ASSERT(nullfb || fb_agno == args.agno || (ap->dfops->dop_low && fb_agno < args.agno)); ap->length = args.len; - ap->ip->i_d.di_nblocks += args.len; + if (!(ap->flags & XFS_BMAPI_COWFORK)) + ap->ip->i_d.di_nblocks += args.len; xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE); if (ap->wasdel) ap->ip->i_delayed_blks -= args.len; @@ -3876,6 +3927,63 @@ xfs_bmap_btalloc( } /* + * For a remap operation, just "allocate" an extent at the address that the + * caller passed in, and ensure that the AGFL is the right size. The caller + * will then map the "allocated" extent into the file somewhere. + */ +STATIC int +xfs_bmap_remap_alloc( + struct xfs_bmalloca *ap) +{ + struct xfs_trans *tp = ap->tp; + struct xfs_mount *mp = tp->t_mountp; + xfs_agblock_t bno; + struct xfs_alloc_arg args; + int error; + + /* + * validate that the block number is legal - the enables us to detect + * and handle a silent filesystem corruption rather than crashing. + */ + memset(&args, 0, sizeof(struct xfs_alloc_arg)); + args.tp = ap->tp; + args.mp = ap->tp->t_mountp; + bno = *ap->firstblock; + args.agno = XFS_FSB_TO_AGNO(mp, bno); + args.agbno = XFS_FSB_TO_AGBNO(mp, bno); + if (args.agno >= mp->m_sb.sb_agcount || + args.agbno >= mp->m_sb.sb_agblocks) + return -EFSCORRUPTED; + + /* "Allocate" the extent from the range we passed in. */ + trace_xfs_bmap_remap_alloc(ap->ip, *ap->firstblock, ap->length); + ap->blkno = bno; + ap->ip->i_d.di_nblocks += ap->length; + xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE); + + /* Fix the freelist, like a real allocator does. */ + args.datatype = ap->datatype; + args.pag = xfs_perag_get(args.mp, args.agno); + ASSERT(args.pag); |