From b16817b66b6c97d2a812d663d26faed40079892a Mon Sep 17 00:00:00 2001 From: Dave Chinner Date: Sun, 13 May 2018 23:10:08 -0700 Subject: xfs: move growfs core to libxfs So it can be shared with userspace (e.g. mkfs) easily. Signed-Off-By: Dave Chinner Reviewed-by: Darrick J. Wong Signed-off-by: Darrick J. Wong --- fs/xfs/xfs_fsops.c | 479 +---------------------------------------------------- 1 file changed, 4 insertions(+), 475 deletions(-) (limited to 'fs/xfs/xfs_fsops.c') diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c index ca3cf3f6239a..c5087b79bcea 100644 --- a/fs/xfs/xfs_fsops.c +++ b/fs/xfs/xfs_fsops.c @@ -24,11 +24,7 @@ #include "xfs_sb.h" #include "xfs_mount.h" #include "xfs_defer.h" -#include "xfs_da_format.h" -#include "xfs_da_btree.h" -#include "xfs_inode.h" #include "xfs_trans.h" -#include "xfs_inode_item.h" #include "xfs_error.h" #include "xfs_btree.h" #include "xfs_alloc_btree.h" @@ -36,411 +32,17 @@ #include "xfs_rmap_btree.h" #include "xfs_ialloc.h" #include "xfs_fsops.h" -#include "xfs_itable.h" #include "xfs_trans_space.h" #include "xfs_rtalloc.h" #include "xfs_trace.h" #include "xfs_log.h" -#include "xfs_filestream.h" #include "xfs_rmap.h" +#include "xfs_ag.h" #include "xfs_ag_resv.h" /* - * File system operations - */ - -static struct xfs_buf * -xfs_growfs_get_hdr_buf( - struct xfs_mount *mp, - xfs_daddr_t blkno, - size_t numblks, - int flags, - const struct xfs_buf_ops *ops) -{ - struct xfs_buf *bp; - - bp = xfs_buf_get_uncached(mp->m_ddev_targp, numblks, flags); - if (!bp) - return NULL; - - xfs_buf_zero(bp, 0, BBTOB(bp->b_length)); - bp->b_bn = blkno; - bp->b_maps[0].bm_bn = blkno; - bp->b_ops = ops; - - return bp; -} - -struct aghdr_init_data { - /* per ag data */ - xfs_agnumber_t agno; /* ag to init */ - xfs_extlen_t agsize; /* new AG size */ - struct list_head buffer_list; /* buffer writeback list */ - xfs_rfsblock_t nfree; /* cumulative new free space */ - - /* per header data */ - xfs_daddr_t daddr; /* header location */ - size_t numblks; /* size of header */ - xfs_btnum_t type; /* type of btree root block */ -}; - -/* - * Generic btree root block init function - */ -static void -xfs_btroot_init( - struct xfs_mount *mp, - struct xfs_buf *bp, - struct aghdr_init_data *id) -{ - xfs_btree_init_block(mp, bp, id->type, 0, 0, id->agno, 0); -} - -/* - * Alloc btree root block init functions - */ -static void -xfs_bnoroot_init( - struct xfs_mount *mp, - struct xfs_buf *bp, - struct aghdr_init_data *id) -{ - struct xfs_alloc_rec *arec; - - xfs_btree_init_block(mp, bp, XFS_BTNUM_BNO, 0, 1, id->agno, 0); - arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1); - arec->ar_startblock = cpu_to_be32(mp->m_ag_prealloc_blocks); - arec->ar_blockcount = cpu_to_be32(id->agsize - - be32_to_cpu(arec->ar_startblock)); -} - -static void -xfs_cntroot_init( - struct xfs_mount *mp, - struct xfs_buf *bp, - struct aghdr_init_data *id) -{ - struct xfs_alloc_rec *arec; - - xfs_btree_init_block(mp, bp, XFS_BTNUM_CNT, 0, 1, id->agno, 0); - arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1); - arec->ar_startblock = cpu_to_be32(mp->m_ag_prealloc_blocks); - arec->ar_blockcount = cpu_to_be32(id->agsize - - be32_to_cpu(arec->ar_startblock)); -} - -/* - * Reverse map root block init - */ -static void -xfs_rmaproot_init( - struct xfs_mount *mp, - struct xfs_buf *bp, - struct aghdr_init_data *id) -{ - struct xfs_btree_block *block = XFS_BUF_TO_BLOCK(bp); - struct xfs_rmap_rec *rrec; - - xfs_btree_init_block(mp, bp, XFS_BTNUM_RMAP, 0, 4, id->agno, 0); - - /* - * mark the AG header regions as static metadata The BNO - * btree block is the first block after the headers, so - * it's location defines the size of region the static - * metadata consumes. - * - * Note: unlike mkfs, we never have to account for log - * space when growing the data regions - */ - rrec = XFS_RMAP_REC_ADDR(block, 1); - rrec->rm_startblock = 0; - rrec->rm_blockcount = cpu_to_be32(XFS_BNO_BLOCK(mp)); - rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_FS); - rrec->rm_offset = 0; - - /* account freespace btree root blocks */ - rrec = XFS_RMAP_REC_ADDR(block, 2); - rrec->rm_startblock = cpu_to_be32(XFS_BNO_BLOCK(mp)); - rrec->rm_blockcount = cpu_to_be32(2); - rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_AG); - rrec->rm_offset = 0; - - /* account inode btree root blocks */ - rrec = XFS_RMAP_REC_ADDR(block, 3); - rrec->rm_startblock = cpu_to_be32(XFS_IBT_BLOCK(mp)); - rrec->rm_blockcount = cpu_to_be32(XFS_RMAP_BLOCK(mp) - - XFS_IBT_BLOCK(mp)); - rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_INOBT); - rrec->rm_offset = 0; - - /* account for rmap btree root */ - rrec = XFS_RMAP_REC_ADDR(block, 4); - rrec->rm_startblock = cpu_to_be32(XFS_RMAP_BLOCK(mp)); - rrec->rm_blockcount = cpu_to_be32(1); - rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_AG); - rrec->rm_offset = 0; - - /* account for refc btree root */ - if (xfs_sb_version_hasreflink(&mp->m_sb)) { - rrec = XFS_RMAP_REC_ADDR(block, 5); - rrec->rm_startblock = cpu_to_be32(xfs_refc_block(mp)); - rrec->rm_blockcount = cpu_to_be32(1); - rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_REFC); - rrec->rm_offset = 0; - be16_add_cpu(&block->bb_numrecs, 1); - } -} - -/* - * Initialise new secondary superblocks with the pre-grow geometry, but mark - * them as "in progress" so we know they haven't yet been activated. This will - * get cleared when the update with the new geometry information is done after - * changes to the primary are committed. This isn't strictly necessary, but we - * get it for free with the delayed buffer write lists and it means we can tell - * if a grow operation didn't complete properly after the fact. - */ -static void -xfs_sbblock_init( - struct xfs_mount *mp, - struct xfs_buf *bp, - struct aghdr_init_data *id) -{ - struct xfs_dsb *dsb = XFS_BUF_TO_SBP(bp); - - xfs_sb_to_disk(dsb, &mp->m_sb); - dsb->sb_inprogress = 1; -} - -static void -xfs_agfblock_init( - struct xfs_mount *mp, - struct xfs_buf *bp, - struct aghdr_init_data *id) -{ - struct xfs_agf *agf = XFS_BUF_TO_AGF(bp); - xfs_extlen_t tmpsize; - - agf->agf_magicnum = cpu_to_be32(XFS_AGF_MAGIC); - agf->agf_versionnum = cpu_to_be32(XFS_AGF_VERSION); - agf->agf_seqno = cpu_to_be32(id->agno); - agf->agf_length = cpu_to_be32(id->agsize); - agf->agf_roots[XFS_BTNUM_BNOi] = cpu_to_be32(XFS_BNO_BLOCK(mp)); - agf->agf_roots[XFS_BTNUM_CNTi] = cpu_to_be32(XFS_CNT_BLOCK(mp)); - agf->agf_levels[XFS_BTNUM_BNOi] = cpu_to_be32(1); - agf->agf_levels[XFS_BTNUM_CNTi] = cpu_to_be32(1); - if (xfs_sb_version_hasrmapbt(&mp->m_sb)) { - agf->agf_roots[XFS_BTNUM_RMAPi] = - cpu_to_be32(XFS_RMAP_BLOCK(mp)); - agf->agf_levels[XFS_BTNUM_RMAPi] = cpu_to_be32(1); - agf->agf_rmap_blocks = cpu_to_be32(1); - } - - agf->agf_flfirst = cpu_to_be32(1); - agf->agf_fllast = 0; - agf->agf_flcount = 0; - tmpsize = id->agsize - mp->m_ag_prealloc_blocks; - agf->agf_freeblks = cpu_to_be32(tmpsize); - agf->agf_longest = cpu_to_be32(tmpsize); - if (xfs_sb_version_hascrc(&mp->m_sb)) - uuid_copy(&agf->agf_uuid, &mp->m_sb.sb_meta_uuid); - if (xfs_sb_version_hasreflink(&mp->m_sb)) { - agf->agf_refcount_root = cpu_to_be32( - xfs_refc_block(mp)); - agf->agf_refcount_level = cpu_to_be32(1); - agf->agf_refcount_blocks = cpu_to_be32(1); - } -} - -static void -xfs_agflblock_init( - struct xfs_mount *mp, - struct xfs_buf *bp, - struct aghdr_init_data *id) -{ - struct xfs_agfl *agfl = XFS_BUF_TO_AGFL(bp); - __be32 *agfl_bno; - int bucket; - - if (xfs_sb_version_hascrc(&mp->m_sb)) { - agfl->agfl_magicnum = cpu_to_be32(XFS_AGFL_MAGIC); - agfl->agfl_seqno = cpu_to_be32(id->agno); - uuid_copy(&agfl->agfl_uuid, &mp->m_sb.sb_meta_uuid); - } - - agfl_bno = XFS_BUF_TO_AGFL_BNO(mp, bp); - for (bucket = 0; bucket < xfs_agfl_size(mp); bucket++) - agfl_bno[bucket] = cpu_to_be32(NULLAGBLOCK); -} - -static void -xfs_agiblock_init( - struct xfs_mount *mp, - struct xfs_buf *bp, - struct aghdr_init_data *id) -{ - struct xfs_agi *agi = XFS_BUF_TO_AGI(bp); - int bucket; - - agi->agi_magicnum = cpu_to_be32(XFS_AGI_MAGIC); - agi->agi_versionnum = cpu_to_be32(XFS_AGI_VERSION); - agi->agi_seqno = cpu_to_be32(id->agno); - agi->agi_length = cpu_to_be32(id->agsize); - agi->agi_count = 0; - agi->agi_root = cpu_to_be32(XFS_IBT_BLOCK(mp)); - agi->agi_level = cpu_to_be32(1); - agi->agi_freecount = 0; - agi->agi_newino = cpu_to_be32(NULLAGINO); - agi->agi_dirino = cpu_to_be32(NULLAGINO); - if (xfs_sb_version_hascrc(&mp->m_sb)) - uuid_copy(&agi->agi_uuid, &mp->m_sb.sb_meta_uuid); - if (xfs_sb_version_hasfinobt(&mp->m_sb)) { - agi->agi_free_root = cpu_to_be32(XFS_FIBT_BLOCK(mp)); - agi->agi_free_level = cpu_to_be32(1); - } - for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++) - agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO); -} - -typedef void (*aghdr_init_work_f)(struct xfs_mount *mp, struct xfs_buf *bp, - struct aghdr_init_data *id); -static int -xfs_growfs_init_aghdr( - struct xfs_mount *mp, - struct aghdr_init_data *id, - aghdr_init_work_f work, - const struct xfs_buf_ops *ops) - -{ - struct xfs_buf *bp; - - bp = xfs_growfs_get_hdr_buf(mp, id->daddr, id->numblks, 0, ops); - if (!bp) - return -ENOMEM; - - (*work)(mp, bp, id); - - xfs_buf_delwri_queue(bp, &id->buffer_list); - xfs_buf_relse(bp); - return 0; -} - -struct xfs_aghdr_grow_data { - xfs_daddr_t daddr; - size_t numblks; - const struct xfs_buf_ops *ops; - aghdr_init_work_f work; - xfs_btnum_t type; - bool need_init; -}; - -/* - * Write new AG headers to disk. Non-transactional, but written - * synchronously so they are completed prior to the growfs transaction - * being logged. + * growfs operations */ -static int -xfs_grow_ag_headers( - struct xfs_mount *mp, - struct aghdr_init_data *id) - -{ - struct xfs_aghdr_grow_data aghdr_data[] = { - { /* SB */ - .daddr = XFS_AG_DADDR(mp, id->agno, XFS_SB_DADDR), - .numblks = XFS_FSS_TO_BB(mp, 1), - .ops = &xfs_sb_buf_ops, - .work = &xfs_sbblock_init, - .need_init = true - }, - { /* AGF */ - .daddr = XFS_AG_DADDR(mp, id->agno, XFS_AGF_DADDR(mp)), - .numblks = XFS_FSS_TO_BB(mp, 1), - .ops = &xfs_agf_buf_ops, - .work = &xfs_agfblock_init, - .need_init = true - }, - { /* AGFL */ - .daddr = XFS_AG_DADDR(mp, id->agno, XFS_AGFL_DADDR(mp)), - .numblks = XFS_FSS_TO_BB(mp, 1), - .ops = &xfs_agfl_buf_ops, - .work = &xfs_agflblock_init, - .need_init = true - }, - { /* AGI */ - .daddr = XFS_AG_DADDR(mp, id->agno, XFS_AGI_DADDR(mp)), - .numblks = XFS_FSS_TO_BB(mp, 1), - .ops = &xfs_agi_buf_ops, - .work = &xfs_agiblock_init, - .need_init = true - }, - { /* BNO root block */ - .daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_BNO_BLOCK(mp)), - .numblks = BTOBB(mp->m_sb.sb_blocksize), - .ops = &xfs_allocbt_buf_ops, - .work = &xfs_bnoroot_init, - .need_init = true - }, - { /* CNT root block */ - .daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_CNT_BLOCK(mp)), - .numblks = BTOBB(mp->m_sb.sb_blocksize), - .ops = &xfs_allocbt_buf_ops, - .work = &xfs_cntroot_init, - .need_init = true - }, - { /* INO root block */ - .daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_IBT_BLOCK(mp)), - .numblks = BTOBB(mp->m_sb.sb_blocksize), - .ops = &xfs_inobt_buf_ops, - .work = &xfs_btroot_init, - .type = XFS_BTNUM_INO, - .need_init = true - }, - { /* FINO root block */ - .daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_FIBT_BLOCK(mp)), - .numblks = BTOBB(mp->m_sb.sb_blocksize), - .ops = &xfs_inobt_buf_ops, - .work = &xfs_btroot_init, - .type = XFS_BTNUM_FINO, - .need_init = xfs_sb_version_hasfinobt(&mp->m_sb) - }, - { /* RMAP root block */ - .daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_RMAP_BLOCK(mp)), - .numblks = BTOBB(mp->m_sb.sb_blocksize), - .ops = &xfs_rmapbt_buf_ops, - .work = &xfs_rmaproot_init, - .need_init = xfs_sb_version_hasrmapbt(&mp->m_sb) - }, - { /* REFC root block */ - .daddr = XFS_AGB_TO_DADDR(mp, id->agno, xfs_refc_block(mp)), - .numblks = BTOBB(mp->m_sb.sb_blocksize), - .ops = &xfs_refcountbt_buf_ops, - .work = &xfs_btroot_init, - .type = XFS_BTNUM_REFC, - .need_init = xfs_sb_version_hasreflink(&mp->m_sb) - }, - { /* NULL terminating block */ - .daddr = XFS_BUF_DADDR_NULL, - } - }; - struct xfs_aghdr_grow_data *dp; - int error = 0; - - /* Account for AG free space in new AG */ - id->nfree += id->agsize - mp->m_ag_prealloc_blocks; - for (dp = &aghdr_data[0]; dp->daddr != XFS_BUF_DADDR_NULL; dp++) { - if (!dp->need_init) - continue; - - id->daddr = dp->daddr; - id->numblks = dp->numblks; - id->type = dp->type; - error = xfs_growfs_init_aghdr(mp, id, dp->work, dp->ops); - if (error) - break; - } - return error; -} - static int xfs_growfs_data_private( xfs_mount_t *mp, /* mount point for filesystem */ @@ -518,7 +120,7 @@ xfs_growfs_data_private( else id.agsize = mp->m_sb.sb_agblocks; - error = xfs_grow_ag_headers(mp, &id); + error = xfs_ag_init_headers(mp, &id); if (error) { xfs_buf_delwri_cancel(&id.buffer_list); goto out_trans_cancel; @@ -682,79 +284,6 @@ xfs_growfs_imaxpct( return xfs_trans_commit(tp); } -/* - * After a grow operation, we need to update all the secondary superblocks - * to match the new state of the primary. Because we are completely overwriting - * all the existing fields in the secondary superblock buffers, there is no need - * to read them in from disk. Just get a new buffer, stamp it and write it. - * - * The sb buffers need to be cached here so that we serialise against scrub - * scanning secondary superblocks, but we don't want to keep it in memory once - * it is written so we mark it as a one-shot buffer. - */ -static int -xfs_growfs_update_superblocks( - struct xfs_mount *mp) -{ - xfs_agnumber_t agno; - int saved_error = 0; - int error = 0; - LIST_HEAD (buffer_list); - - /* update secondary superblocks. */ - for (agno = 1; agno < mp->m_sb.sb_agcount; agno++) { - struct xfs_buf *bp; - - bp = xfs_buf_get(mp->m_ddev_targp, - XFS_AG_DADDR(mp, agno, XFS_SB_DADDR), - XFS_FSS_TO_BB(mp, 1), 0); - /* - * If we get an error reading or writing alternate superblocks, - * continue. xfs_repair chooses the "best" superblock based - * on most matches; if we break early, we'll leave more - * superblocks un-updated than updated, and xfs_repair may - * pick them over the properly-updated primary. - */ - if (!bp) { - xfs_warn(mp, - "error allocating secondary superblock for ag %d", - agno); - if (!saved_error) - saved_error = -ENOMEM; - continue; - } - - bp->b_ops = &xfs_sb_buf_ops; - xfs_buf_oneshot(bp); - xfs_buf_zero(bp, 0, BBTOB(bp->b_length)); - xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb); - xfs_buf_delwri_queue(bp, &buffer_list); - xfs_buf_relse(bp); - - /* don't hold too many buffers at once */ - if (agno % 16) - continue; - - error = xfs_buf_delwri_submit(&buffer_list); - if (error) { - xfs_warn(mp, - "write error %d updating a secondary superblock near ag %d", - error, agno); - if (!saved_error) - saved_error = error; - continue; - } - } - error = xfs_buf_delwri_submit(&buffer_list); - if (error) { - xfs_warn(mp, - "write error %d updating a secondary superblock near ag %d", - error, agno); - } - - return saved_error ? saved_error : error; -} - /* * protected versions of growfs function acquire and release locks on the mount * point - exported through ioctls: XFS_IOC_FSGROWFSDATA, XFS_IOC_FSGROWFSLOG, @@ -794,7 +323,7 @@ xfs_growfs_data( mp->m_maxicount = 0; /* Update secondary superblocks now the physical grow has completed */ - error = xfs_growfs_update_superblocks(mp); + error = xfs_update_secondary_sbs(mp); out_error: /* -- cgit