diff options
Diffstat (limited to 'fs/xfs/xfs_rtalloc.c')
| -rw-r--r-- | fs/xfs/xfs_rtalloc.c | 1946 |
1 files changed, 1334 insertions, 612 deletions
diff --git a/fs/xfs/xfs_rtalloc.c b/fs/xfs/xfs_rtalloc.c index e66f9bd5de5c..736eb0924573 100644 --- a/fs/xfs/xfs_rtalloc.c +++ b/fs/xfs/xfs_rtalloc.c @@ -12,6 +12,7 @@ #include "xfs_bit.h" #include "xfs_mount.h" #include "xfs_inode.h" +#include "xfs_alloc.h" #include "xfs_bmap.h" #include "xfs_bmap_btree.h" #include "xfs_bmap_util.h" @@ -21,9 +22,18 @@ #include "xfs_rtalloc.h" #include "xfs_sb.h" #include "xfs_rtbitmap.h" +#include "xfs_rtrmap_btree.h" #include "xfs_quota.h" #include "xfs_log_priv.h" #include "xfs_health.h" +#include "xfs_da_format.h" +#include "xfs_metafile.h" +#include "xfs_rtgroup.h" +#include "xfs_error.h" +#include "xfs_trace.h" +#include "xfs_rtrefcount_btree.h" +#include "xfs_reflink.h" +#include "xfs_zone_alloc.h" /* * Return whether there are any free extents in the size range given @@ -37,14 +47,14 @@ xfs_rtany_summary( xfs_fileoff_t bbno, /* bitmap block number */ int *maxlog) /* out: max log2 extent size free */ { - struct xfs_mount *mp = args->mp; + uint8_t *rsum_cache = args->rtg->rtg_rsum_cache; int error; int log; /* loop counter, log2 of ext. size */ xfs_suminfo_t sum; /* summary data */ - /* There are no extents at levels >= m_rsum_cache[bbno]. */ - if (mp->m_rsum_cache) { - high = min(high, mp->m_rsum_cache[bbno] - 1); + /* There are no extents at levels >= rsum_cache[bbno]. */ + if (rsum_cache) { + high = min(high, rsum_cache[bbno] - 1); if (low > high) { *maxlog = -1; return 0; @@ -76,12 +86,11 @@ xfs_rtany_summary( *maxlog = -1; out: /* There were no extents at levels > log. */ - if (mp->m_rsum_cache && log + 1 < mp->m_rsum_cache[bbno]) - mp->m_rsum_cache[bbno] = log + 1; + if (rsum_cache && log + 1 < rsum_cache[bbno]) + rsum_cache[bbno] = log + 1; return 0; } - /* * Copy and transform the summary file, given the old and new * parameters in the mount structures. @@ -141,14 +150,14 @@ xfs_rtallocate_range( * We need to find the beginning and end of the extent so we can * properly update the summary. */ - error = xfs_rtfind_back(args, start, 0, &preblock); + error = xfs_rtfind_back(args, start, &preblock); if (error) return error; /* * Find the next allocated block (end of free extent). */ - error = xfs_rtfind_forw(args, end, mp->m_sb.sb_rextents - 1, + error = xfs_rtfind_forw(args, end, args->rtg->rtg_extents - 1, &postblock); if (error) return error; @@ -193,21 +202,32 @@ xfs_rtallocate_range( return xfs_rtmodify_range(args, start, len, 0); } +/* Reduce @rtxlen until it is a multiple of @prod. */ +static inline xfs_rtxlen_t +xfs_rtalloc_align_len( + xfs_rtxlen_t rtxlen, + xfs_rtxlen_t prod) +{ + if (unlikely(prod > 1)) + return rounddown(rtxlen, prod); + return rtxlen; +} + /* * Make sure we don't run off the end of the rt volume. Be careful that * adjusting maxlen downwards doesn't cause us to fail the alignment checks. */ static inline xfs_rtxlen_t xfs_rtallocate_clamp_len( - struct xfs_mount *mp, + struct xfs_rtgroup *rtg, xfs_rtxnum_t startrtx, xfs_rtxlen_t rtxlen, xfs_rtxlen_t prod) { xfs_rtxlen_t ret; - ret = min(mp->m_sb.sb_rextents, startrtx + rtxlen) - startrtx; - return rounddown(ret, prod); + ret = min(rtg->rtg_extents, startrtx + rtxlen) - startrtx; + return xfs_rtalloc_align_len(ret, prod); } /* @@ -228,39 +248,41 @@ xfs_rtallocate_extent_block( xfs_rtxnum_t *rtx) /* out: start rtext allocated */ { struct xfs_mount *mp = args->mp; - xfs_rtxnum_t besti; /* best rtext found so far */ - xfs_rtxnum_t bestlen;/* best length found so far */ + xfs_rtxnum_t besti = -1; /* best rtext found so far */ xfs_rtxnum_t end; /* last rtext in chunk */ - int error; xfs_rtxnum_t i; /* current rtext trying */ xfs_rtxnum_t next; /* next rtext to try */ + xfs_rtxlen_t scanlen; /* number of free rtx to look for */ + xfs_rtxlen_t bestlen = 0; /* best length found so far */ int stat; /* status from internal calls */ + int error; /* - * Loop over all the extents starting in this bitmap block, - * looking for one that's long enough. + * Loop over all the extents starting in this bitmap block up to the + * end of the rt volume, looking for one that's long enough. */ - for (i = xfs_rbmblock_to_rtx(mp, bbno), besti = -1, bestlen = 0, - end = xfs_rbmblock_to_rtx(mp, bbno + 1) - 1; - i <= end; - i++) { + end = min(args->rtg->rtg_extents, xfs_rbmblock_to_rtx(mp, bbno + 1)) - + 1; + for (i = xfs_rbmblock_to_rtx(mp, bbno); i <= end; i++) { /* Make sure we don't scan off the end of the rt volume. */ - maxlen = xfs_rtallocate_clamp_len(mp, i, maxlen, prod); + scanlen = xfs_rtallocate_clamp_len(args->rtg, i, maxlen, prod); + if (scanlen < minlen) + break; /* - * See if there's a free extent of maxlen starting at i. + * See if there's a free extent of scanlen starting at i. * If it's not so then next will contain the first non-free. */ - error = xfs_rtcheck_range(args, i, maxlen, 1, &next, &stat); + error = xfs_rtcheck_range(args, i, scanlen, 1, &next, &stat); if (error) return error; if (stat) { /* - * i for maxlen is all free, allocate and return that. + * i to scanlen is all free, allocate and return that. */ - bestlen = maxlen; - besti = i; - goto allocate; + *len = scanlen; + *rtx = i; + return 0; } /* @@ -288,38 +310,28 @@ xfs_rtallocate_extent_block( return error; } - /* - * Searched the whole thing & didn't find a maxlen free extent. - */ - if (minlen > maxlen || besti == -1) { - /* - * Allocation failed. Set *nextp to the next block to try. - */ - *nextp = next; - return -ENOSPC; - } + /* Searched the whole thing & didn't find a maxlen free extent. */ + if (besti == -1) + goto nospace; /* - * If size should be a multiple of prod, make that so. + * Ensure bestlen is a multiple of prod, but don't return a too-short + * extent. */ - if (prod > 1) { - xfs_rtxlen_t p; /* amount to trim length by */ - - div_u64_rem(bestlen, prod, &p); - if (p) - bestlen -= p; - } + bestlen = xfs_rtalloc_align_len(bestlen, prod); + if (bestlen < minlen) + goto nospace; /* - * Allocate besti for bestlen & return that. + * Pick besti for bestlen & return that. */ -allocate: - error = xfs_rtallocate_range(args, besti, bestlen); - if (error) - return error; *len = bestlen; *rtx = besti; return 0; +nospace: + /* Allocation failed. Set *nextp to the next block to try. */ + *nextp = next; + return -ENOSPC; } /* @@ -338,45 +350,45 @@ xfs_rtallocate_extent_exact( xfs_rtxlen_t prod, /* extent product factor */ xfs_rtxnum_t *rtx) /* out: start rtext allocated */ { - int error; - xfs_rtxlen_t i; /* extent length trimmed due to prod */ - int isfree; /* extent is free */ xfs_rtxnum_t next; /* next rtext to try (dummy) */ + xfs_rtxlen_t alloclen; /* candidate length */ + xfs_rtxlen_t scanlen; /* number of free rtx to look for */ + int isfree; /* extent is free */ + int error; ASSERT(minlen % prod == 0); ASSERT(maxlen % prod == 0); - /* - * Check if the range in question (for maxlen) is free. - */ - error = xfs_rtcheck_range(args, start, maxlen, 1, &next, &isfree); + + /* Make sure we don't run off the end of the rt volume. */ + scanlen = xfs_rtallocate_clamp_len(args->rtg, start, maxlen, prod); + if (scanlen < minlen) + return -ENOSPC; + + /* Check if the range in question (for scanlen) is free. */ + error = xfs_rtcheck_range(args, start, scanlen, 1, &next, &isfree); if (error) return error; - if (!isfree) { - /* - * If not, allocate what there is, if it's at least minlen. - */ - maxlen = next - start; - if (maxlen < minlen) - return -ENOSPC; - - /* - * Trim off tail of extent, if prod is specified. - */ - if (prod > 1 && (i = maxlen % prod)) { - maxlen -= i; - if (maxlen < minlen) - return -ENOSPC; - } + if (isfree) { + /* start to scanlen is all free; allocate it. */ + *len = scanlen; + *rtx = start; + return 0; } /* - * Allocate what we can and return it. + * If not, allocate what there is, if it's at least minlen. */ - error = xfs_rtallocate_range(args, start, maxlen); - if (error) - return error; - *len = maxlen; + alloclen = next - start; + if (alloclen < minlen) + return -ENOSPC; + + /* Ensure alloclen is a multiple of prod. */ + alloclen = xfs_rtalloc_align_len(alloclen, prod); + if (alloclen < minlen) + return -ENOSPC; + + *len = alloclen; *rtx = start; return 0; } @@ -409,16 +421,10 @@ xfs_rtallocate_extent_near( ASSERT(maxlen % prod == 0); /* - * If the block number given is off the end, silently set it to - * the last block. + * If the block number given is off the end, silently set it to the last + * block. */ - if (start >= mp->m_sb.sb_rextents) - start = mp->m_sb.sb_rextents - 1; - - /* Make sure we don't run off the end of the rt volume. */ - maxlen = xfs_rtallocate_clamp_len(mp, start, maxlen, prod); - if (maxlen < minlen) - return -ENOSPC; + start = min(start, args->rtg->rtg_extents - 1); /* * Try the exact allocation first. @@ -428,7 +434,6 @@ xfs_rtallocate_extent_near( if (error != -ENOSPC) return error; - bbno = xfs_rtx_to_rbmblock(mp, start); i = 0; j = -1; @@ -551,11 +556,11 @@ xfs_rtalloc_sumlevel( xfs_rtxnum_t *rtx) /* out: start rtext allocated */ { xfs_fileoff_t i; /* bitmap block number */ + int error; for (i = 0; i < args->mp->m_sb.sb_rbmblocks; i++) { xfs_suminfo_t sum; /* summary information for extents */ xfs_rtxnum_t n; /* next rtext to be tried */ - int error; error = xfs_rtget_summary(args, l, i, &sum); if (error) @@ -591,7 +596,7 @@ xfs_rtalloc_sumlevel( * specified. If we don't get maxlen then use prod to trim * the length, if given. The lengths are all in rtextents. */ -STATIC int +static int xfs_rtallocate_extent_size( struct xfs_rtalloc_args *args, xfs_rtxlen_t minlen, /* minimum length to allocate */ @@ -651,173 +656,724 @@ xfs_rtallocate_extent_size( return -ENOSPC; } +static void +xfs_rtunmount_rtg( + struct xfs_rtgroup *rtg) +{ + int i; + + for (i = 0; i < XFS_RTGI_MAX; i++) + xfs_rtginode_irele(&rtg->rtg_inodes[i]); + if (!xfs_has_zoned(rtg_mount(rtg))) + kvfree(rtg->rtg_rsum_cache); +} + +static int +xfs_alloc_rsum_cache( + struct xfs_rtgroup *rtg, + xfs_extlen_t rbmblocks) +{ + /* + * The rsum cache is initialized to the maximum value, which is + * trivially an upper bound on the maximum level with any free extents. + */ + rtg->rtg_rsum_cache = kvmalloc(rbmblocks, GFP_KERNEL); + if (!rtg->rtg_rsum_cache) + return -ENOMEM; + memset(rtg->rtg_rsum_cache, -1, rbmblocks); + return 0; +} + /* - * Allocate space to the bitmap or summary file, and zero it, for growfs. + * If we changed the rt extent size (meaning there was no rt volume previously) + * and the root directory had EXTSZINHERIT and RTINHERIT set, it's possible + * that the extent size hint on the root directory is no longer congruent with + * the new rt extent size. Log the rootdir inode to fix this. */ -STATIC int -xfs_growfs_rt_alloc( - struct xfs_mount *mp, /* file system mount point */ - xfs_extlen_t oblocks, /* old count of blocks */ - xfs_extlen_t nblocks, /* new count of blocks */ - struct xfs_inode *ip) /* inode (bitmap/summary) */ +static int +xfs_growfs_rt_fixup_extsize( + struct xfs_mount *mp) { - xfs_fileoff_t bno; /* block number in file */ - struct xfs_buf *bp; /* temporary buffer for zeroing */ - xfs_daddr_t d; /* disk block address */ - int error; /* error return value */ - xfs_fsblock_t fsbno; /* filesystem block for bno */ - struct xfs_bmbt_irec map; /* block map output */ - int nmap; /* number of block maps */ - int resblks; /* space reservation */ - enum xfs_blft buf_type; + struct xfs_inode *ip = mp->m_rootip; struct xfs_trans *tp; + int error = 0; + + xfs_ilock(ip, XFS_IOLOCK_EXCL); + if (!(ip->i_diflags & XFS_DIFLAG_RTINHERIT) || + !(ip->i_diflags & XFS_DIFLAG_EXTSZINHERIT)) + goto out_iolock; - if (ip == mp->m_rsumip) - buf_type = XFS_BLFT_RTSUMMARY_BUF; + error = xfs_trans_alloc_inode(ip, &M_RES(mp)->tr_ichange, 0, 0, false, + &tp); + if (error) + goto out_iolock; + + xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); + error = xfs_trans_commit(tp); + xfs_iunlock(ip, XFS_ILOCK_EXCL); + +out_iolock: + xfs_iunlock(ip, XFS_IOLOCK_EXCL); + return error; +} + +/* Ensure that the rtgroup metadata inode is loaded, creating it if neeeded. */ +static int +xfs_rtginode_ensure( + struct xfs_rtgroup *rtg, + enum xfs_rtg_inodes type) +{ + struct xfs_trans *tp; + int error; + + if (rtg->rtg_inodes[type]) + return 0; + + error = xfs_trans_alloc_empty(rtg_mount(rtg), &tp); + if (error) + return error; + error = xfs_rtginode_load(rtg, type, tp); + xfs_trans_cancel(tp); + + if (error != -ENOENT) + return 0; + return xfs_rtginode_create(rtg, type, true); +} + +static struct xfs_mount * +xfs_growfs_rt_alloc_fake_mount( + const struct xfs_mount *mp, + xfs_rfsblock_t rblocks, + xfs_agblock_t rextsize) +{ + struct xfs_mount *nmp; + + nmp = kmemdup(mp, sizeof(*mp), GFP_KERNEL); + if (!nmp) + return NULL; + xfs_mount_sb_set_rextsize(nmp, &nmp->m_sb, rextsize); + nmp->m_sb.sb_rblocks = rblocks; + nmp->m_sb.sb_rextents = xfs_blen_to_rtbxlen(nmp, nmp->m_sb.sb_rblocks); + nmp->m_sb.sb_rbmblocks = xfs_rtbitmap_blockcount(nmp); + nmp->m_sb.sb_rextslog = xfs_compute_rextslog(nmp->m_sb.sb_rextents); + if (xfs_has_rtgroups(nmp)) + nmp->m_sb.sb_rgcount = howmany_64(nmp->m_sb.sb_rextents, + nmp->m_sb.sb_rgextents); else - buf_type = XFS_BLFT_RTBITMAP_BUF; + nmp->m_sb.sb_rgcount = 1; + nmp->m_rsumblocks = xfs_rtsummary_blockcount(nmp, &nmp->m_rsumlevels); + + if (rblocks > 0) + nmp->m_features |= XFS_FEAT_REALTIME; + + /* recompute growfsrt reservation from new rsumsize */ + xfs_trans_resv_calc(nmp, &nmp->m_resv); + return nmp; +} + +/* Free all the new space and return the number of extents actually freed. */ +static int +xfs_growfs_rt_free_new( + struct xfs_rtgroup *rtg, + struct xfs_rtalloc_args *nargs, + xfs_rtbxlen_t *freed_rtx) +{ + struct xfs_mount *mp = rtg_mount(rtg); + xfs_rgnumber_t rgno = rtg_rgno(rtg); + xfs_rtxnum_t start_rtx = 0, end_rtx; + + if (rgno < mp->m_sb.sb_rgcount) + start_rtx = xfs_rtgroup_extents(mp, rgno); + end_rtx = xfs_rtgroup_extents(nargs->mp, rgno); /* - * Allocate space to the file, as necessary. + * Compute the first new extent that we want to free, being careful to + * skip past a realtime superblock at the start of the realtime volume. */ - while (oblocks < nblocks) { - resblks = XFS_GROWFSRT_SPACE_RES(mp, nblocks - oblocks); - /* - * Reserve space & log for one extent added to the file. - */ - error = xfs_trans_alloc(mp, &M_RES(mp)->tr_growrtalloc, resblks, - 0, 0, &tp); + if (xfs_has_rtsb(nargs->mp) && rgno == 0 && start_rtx == 0) + start_rtx++; + *freed_rtx = end_rtx - start_rtx; + return xfs_rtfree_range(nargs, start_rtx, *freed_rtx); +} + +static xfs_rfsblock_t +xfs_growfs_rt_nrblocks( + struct xfs_rtgroup *rtg, + xfs_rfsblock_t nrblocks, + xfs_agblock_t rextsize, + xfs_fileoff_t bmbno) +{ + struct xfs_mount *mp = rtg_mount(rtg); + xfs_rfsblock_t step; + + step = (bmbno + 1) * mp->m_rtx_per_rbmblock * rextsize; + if (xfs_has_rtgroups(mp)) { + xfs_rfsblock_t rgblocks = mp->m_sb.sb_rgextents * rextsize; + + step = min(rgblocks, step) + rgblocks * rtg_rgno(rtg); + } + + return min(nrblocks, step); +} + +/* + * If the post-grow filesystem will have an rtsb; we're initializing the first + * rtgroup; and the filesystem didn't have a realtime section, write the rtsb + * now, and attach the rtsb buffer to the real mount. + */ +static int +xfs_growfs_rt_init_rtsb( + const struct xfs_rtalloc_args *nargs, + const struct xfs_rtgroup *rtg, + const struct xfs_rtalloc_args *args) +{ + struct xfs_mount *mp = args->mp; + struct xfs_buf *rtsb_bp; + int error; + + if (!xfs_has_rtsb(nargs->mp)) + return 0; + if (rtg_rgno(rtg) > 0) + return 0; + if (mp->m_sb.sb_rblocks) + return 0; + + error = xfs_buf_get_uncached(mp->m_rtdev_targp, XFS_FSB_TO_BB(mp, 1), + &rtsb_bp); + if (error) + return error; + + rtsb_bp->b_maps[0].bm_bn = XFS_RTSB_DADDR; + rtsb_bp->b_ops = &xfs_rtsb_buf_ops; + + xfs_update_rtsb(rtsb_bp, mp->m_sb_bp); + mp->m_rtsb_bp = rtsb_bp; + error = xfs_bwrite(rtsb_bp); + xfs_buf_unlock(rtsb_bp); + if (error) + return error; + + /* Initialize the rtrmap to reflect the rtsb. */ + if (rtg_rmap(args->rtg) != NULL) + error = xfs_rtrmapbt_init_rtsb(nargs->mp, args->rtg, args->tp); + + return error; +} + +static void +xfs_growfs_rt_sb_fields( + struct xfs_trans *tp, + const struct xfs_mount *nmp) +{ + struct xfs_mount *mp = tp->t_mountp; + + if (nmp->m_sb.sb_rextsize != mp->m_sb.sb_rextsize) + xfs_trans_mod_sb(tp, XFS_TRANS_SB_REXTSIZE, + nmp->m_sb.sb_rextsize - mp->m_sb.sb_rextsize); + if (nmp->m_sb.sb_rbmblocks != mp->m_sb.sb_rbmblocks) + xfs_trans_mod_sb(tp, XFS_TRANS_SB_RBMBLOCKS, + nmp->m_sb.sb_rbmblocks - mp->m_sb.sb_rbmblocks); + if (nmp->m_sb.sb_rblocks != mp->m_sb.sb_rblocks) + xfs_trans_mod_sb(tp, XFS_TRANS_SB_RBLOCKS, + nmp->m_sb.sb_rblocks - mp->m_sb.sb_rblocks); + if (nmp->m_sb.sb_rextents != mp->m_sb.sb_rextents) + xfs_trans_mod_sb(tp, XFS_TRANS_SB_REXTENTS, + nmp->m_sb.sb_rextents - mp->m_sb.sb_rextents); + if (nmp->m_sb.sb_rextslog != mp->m_sb.sb_rextslog) + xfs_trans_mod_sb(tp, XFS_TRANS_SB_REXTSLOG, + nmp->m_sb.sb_rextslog - mp->m_sb.sb_rextslog); + if (nmp->m_sb.sb_rgcount != mp->m_sb.sb_rgcount) + xfs_trans_mod_sb(tp, XFS_TRANS_SB_RGCOUNT, + nmp->m_sb.sb_rgcount - mp->m_sb.sb_rgcount); +} + +static int +xfs_growfs_rt_zoned( + struct xfs_rtgroup *rtg, + xfs_rfsblock_t nrblocks) +{ + struct xfs_mount *mp = rtg_mount(rtg); + struct xfs_mount *nmp; + struct xfs_trans *tp; + xfs_rtbxlen_t freed_rtx; + int error; + + /* + * Calculate new sb and mount fields for this round. Also ensure the + * rtg_extents value is uptodate as the rtbitmap code relies on it. + */ + nmp = xfs_growfs_rt_alloc_fake_mount(mp, nrblocks, + mp->m_sb.sb_rextsize); + if (!nmp) + return -ENOMEM; + freed_rtx = nmp->m_sb.sb_rextents - mp->m_sb.sb_rextents; + + xfs_rtgroup_calc_geometry(nmp, rtg, rtg_rgno(rtg), + nmp->m_sb.sb_rgcount, nmp->m_sb.sb_rextents); + + error = xfs_trans_alloc(mp, &M_RES(nmp)->tr_growrtfree, 0, 0, 0, &tp); + if (error) + goto out_free; + + xfs_rtgroup_lock(rtg, XFS_RTGLOCK_RMAP); + xfs_rtgroup_trans_join(tp, rtg, XFS_RTGLOCK_RMAP); + + xfs_growfs_rt_sb_fields(tp, nmp); + xfs_trans_mod_sb(tp, XFS_TRANS_SB_FREXTENTS, freed_rtx); + + error = xfs_trans_commit(tp); + if (error) + goto out_free; + + /* + * Ensure the mount RT feature flag is now set, and compute new + * maxlevels for rt btrees. + */ + mp->m_features |= XFS_FEAT_REALTIME; + xfs_rtrmapbt_compute_maxlevels(mp); + xfs_rtrefcountbt_compute_maxlevels(mp); + xfs_zoned_add_available(mp, freed_rtx); +out_free: + kfree(nmp); + return error; +} + +static int +xfs_growfs_rt_bmblock( + struct xfs_rtgroup *rtg, + xfs_rfsblock_t nrblocks, + xfs_agblock_t rextsize, + xfs_fileoff_t bmbno) +{ + struct xfs_mount *mp = rtg_mount(rtg); + struct xfs_inode *rbmip = rtg_bitmap(rtg); + struct xfs_inode *rsumip = rtg_summary(rtg); + struct xfs_rtalloc_args args = { + .mp = mp, + .rtg = rtg, + }; + struct xfs_rtalloc_args nargs = { + .rtg = rtg, + }; + struct xfs_mount *nmp; + xfs_rtbxlen_t freed_rtx; + int error; + + /* + * Calculate new sb and mount fields for this round. Also ensure the + * rtg_extents value is uptodate as the rtbitmap code relies on it. + */ + nmp = nargs.mp = xfs_growfs_rt_alloc_fake_mount(mp, + xfs_growfs_rt_nrblocks(rtg, nrblocks, rextsize, bmbno), + rextsize); + if (!nmp) + return -ENOMEM; + + xfs_rtgroup_calc_geometry(nmp, rtg, rtg_rgno(rtg), + nmp->m_sb.sb_rgcount, nmp->m_sb.sb_rextents); + + /* + * Recompute the growfsrt reservation from the new rsumsize, so that the + * transaction below use the new, potentially larger value. + * */ + xfs_trans_resv_calc(nmp, &nmp->m_resv); + error = xfs_trans_alloc(mp, &M_RES(nmp)->tr_growrtfree, 0, 0, 0, + &args.tp); + if (error) + goto out_free; + nargs.tp = args.tp; + + xfs_rtgroup_lock(args.rtg, XFS_RTGLOCK_BITMAP | XFS_RTGLOCK_RMAP); + xfs_rtgroup_trans_join(args.tp, args.rtg, + XFS_RTGLOCK_BITMAP | XFS_RTGLOCK_RMAP); + + /* + * Update the bitmap inode's size ondisk and incore. We need to update + * the incore size so that inode inactivation won't punch what it thinks + * are "posteof" blocks. + */ + rbmip->i_disk_size = nmp->m_sb.sb_rbmblocks * nmp->m_sb.sb_blocksize; + i_size_write(VFS_I(rbmip), rbmip->i_disk_size); + xfs_trans_log_inode(args.tp, rbmip, XFS_ILOG_CORE); + + /* + * Update the summary inode's size. We need to update the incore size + * so that inode inactivation won't punch what it thinks are "posteof" + * blocks. + */ + rsumip->i_disk_size = nmp->m_rsumblocks * nmp->m_sb.sb_blocksize; + i_size_write(VFS_I(rsumip), rsumip->i_disk_size); + xfs_trans_log_inode(args.tp, rsumip, XFS_ILOG_CORE); + + /* + * Copy summary data from old to new sizes when the real size (not + * block-aligned) changes. + */ + if (mp->m_sb.sb_rbmblocks != nmp->m_sb.sb_rbmblocks || + mp->m_rsumlevels != nmp->m_rsumlevels) { + error = xfs_rtcopy_summary(&args, &nargs); if (error) - return error; + goto out_cancel; + } + + error = xfs_growfs_rt_init_rtsb(&nargs, rtg, &args); + if (error) + goto out_cancel; + + /* + * Update superblock fields. + */ + xfs_growfs_rt_sb_fields(args.tp, nmp); + + /* + * Free the new extent. + */ + error = xfs_growfs_rt_free_new(rtg, &nargs, &freed_rtx); + xfs_rtbuf_cache_relse(&nargs); + if (error) + goto out_cancel; + + /* + * Mark more blocks free in the superblock. + */ + xfs_trans_mod_sb(args.tp, XFS_TRANS_SB_FREXTENTS, freed_rtx); + + /* + * Update the calculated values in the real mount structure. + */ + mp->m_rsumlevels = nmp->m_rsumlevels; + mp->m_rsumblocks = nmp->m_rsumblocks; + + /* + * Recompute the growfsrt reservation from the new rsumsize. + */ + xfs_trans_resv_calc(mp, &mp->m_resv); + + error = xfs_trans_commit(args.tp); + if (error) + goto out_free; + + /* + * Ensure the mount RT feature flag is now set, and compute new + * maxlevels for rt btrees. + */ + mp->m_features |= XFS_FEAT_REALTIME; + xfs_rtrmapbt_compute_maxlevels(mp); + xfs_rtrefcountbt_compute_maxlevels(mp); + + kfree(nmp); + return 0; + +out_cancel: + xfs_trans_cancel(args.tp); +out_free: + kfree(nmp); + return error; +} + +static xfs_rtxnum_t +xfs_last_rtgroup_extents( + struct xfs_mount *mp) +{ + return mp->m_sb.sb_rextents - + ((xfs_rtxnum_t)(mp->m_sb.sb_rgcount - 1) * + mp->m_sb.sb_rgextents); +} + +/* + * Calculate the last rbmblock currently used. + * + * This also deals with the case where there were no rtextents before. + */ +static xfs_fileoff_t +xfs_last_rt_bmblock( + struct xfs_rtgroup *rtg) +{ + struct xfs_mount *mp = rtg_mount(rtg); + xfs_rgnumber_t rgno = rtg_rgno(rtg); + xfs_fileoff_t bmbno = 0; + + ASSERT(!mp->m_sb.sb_rgcount || rgno >= mp->m_sb.sb_rgcount - 1); + + if (mp->m_sb.sb_rgcount && rgno == mp->m_sb.sb_rgcount - 1) { + xfs_rtxnum_t nrext = xfs_last_rtgroup_extents(mp); + + /* Also fill up the previous block if not entirely full. */ + bmbno = xfs_rtbitmap_blockcount_len(mp, nrext); + if (xfs_rtx_to_rbmword(mp, nrext) != 0) + bmbno--; + } + + return bmbno; +} + +/* + * Allocate space to the bitmap and summary files, as necessary. + */ +static int +xfs_growfs_rt_alloc_blocks( + struct xfs_rtgroup *rtg, + xfs_rfsblock_t nrblocks, + xfs_agblock_t rextsize, + xfs_extlen_t *nrbmblocks) +{ + struct xfs_mount *mp = rtg_mount(rtg); + struct xfs_inode *rbmip = rtg_bitmap(rtg); + struct xfs_inode *rsumip = rtg_summary(rtg); + xfs_extlen_t orbmblocks = 0; + xfs_extlen_t orsumblocks = 0; + struct xfs_mount *nmp; + int error = 0; + + nmp = xfs_growfs_rt_alloc_fake_mount(mp, nrblocks, rextsize); + if (!nmp) + return -ENOMEM; + *nrbmblocks = nmp->m_sb.sb_rbmblocks; + + if (xfs_has_rtgroups(mp)) { /* - * Lock the inode. + * For file systems with the rtgroups feature, the RT bitmap and + * summary are always fully allocated, which means that we never + * need to grow the existing files. + * + * But we have to be careful to only fill the bitmap until the + * end of the actually used range. */ - xfs_ilock(ip, XFS_ILOCK_EXCL); - xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); - - error = xfs_iext_count_may_overflow(ip, XFS_DATA_FORK, - XFS_IEXT_ADD_NOSPLIT_CNT); - if (error == -EFBIG) - error = xfs_iext_count_upgrade(tp, ip, - XFS_IEXT_ADD_NOSPLIT_CNT); - if (error) - goto out_trans_cancel; + if (rtg_rgno(rtg) == nmp->m_sb.sb_rgcount - 1) + *nrbmblocks = xfs_rtbitmap_blockcount_len(nmp, + xfs_last_rtgroup_extents(nmp)); + if (mp->m_sb.sb_rgcount && + rtg_rgno(rtg) == mp->m_sb.sb_rgcount - 1) + goto out_free; + } else { /* - * Allocate blocks to the bitmap file. + * Get the old block counts for bitmap and summary inodes. + * These can't change since other growfs callers are locked out. */ - nmap = 1; - error = xfs_bmapi_write(tp, ip, oblocks, nblocks - oblocks, - XFS_BMAPI_METADATA, 0, &map, &nmap); - if (!error && nmap < 1) - error = -ENOSPC; + orbmblocks = XFS_B_TO_FSB(mp, rbmip->i_disk_size); + orsumblocks = XFS_B_TO_FSB(mp, rsumip->i_disk_size); + } + + error = xfs_rtfile_initialize_blocks(rtg, XFS_RTGI_BITMAP, orbmblocks, + nmp->m_sb.sb_rbmblocks, NULL); + if (error) + goto out_free; + error = xfs_rtfile_initialize_blocks(rtg, XFS_RTGI_SUMMARY, orsumblocks, + nmp->m_rsumblocks, NULL); +out_free: + kfree(nmp); + return error; +} + +static int +xfs_growfs_rtg( + struct xfs_mount *mp, + xfs_rgnumber_t rgno, + xfs_rfsblock_t nrblocks, + xfs_agblock_t rextsize) +{ + uint8_t *old_rsum_cache = NULL; + xfs_extlen_t bmblocks; + xfs_fileoff_t bmbno; + struct xfs_rtgroup *rtg; + unsigned int i; + int error; + + rtg = xfs_rtgroup_grab(mp, rgno); + if (!rtg) + return -EINVAL; + + for (i = 0; i < XFS_RTGI_MAX; i++) { + error = xfs_rtginode_ensure(rtg, i); if (error) - goto out_trans_cancel; - /* - * Free any blocks freed up in the transaction, then commit. - */ - error = xfs_trans_commit(tp); + goto out_rele; + } + + if (xfs_has_zoned(mp)) { + error = xfs_growfs_rt_zoned(rtg, nrblocks); + goto out_rele; + } + + error = xfs_growfs_rt_alloc_blocks(rtg, nrblocks, rextsize, &bmblocks); + if (error) + goto out_rele; + + if (bmblocks != rtg_mount(rtg)->m_sb.sb_rbmblocks) { + old_rsum_cache = rtg->rtg_rsum_cache; + error = xfs_alloc_rsum_cache(rtg, bmblocks); if (error) - return error; - /* - * Now we need to clear the allocated blocks. - * Do this one block per transaction, to keep it simple. - */ - for (bno = map.br_startoff, fsbno = map.br_startblock; - bno < map.br_startoff + map.br_blockcount; - bno++, fsbno++) { - /* - * Reserve log for one block zeroing. - */ - error = xfs_trans_alloc(mp, &M_RES(mp)->tr_growrtzero, - 0, 0, 0, &tp); - if (error) - return error; - /* - * Lock the bitmap inode. - */ - xfs_ilock(ip, XFS_ILOCK_EXCL); - xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); - /* - * Get a buffer for the block. - */ - d = XFS_FSB_TO_DADDR(mp, fsbno); - error = xfs_trans_get_buf(tp, mp->m_ddev_targp, d, - mp->m_bsize, 0, &bp); - if (error) - goto out_trans_cancel; + goto out_rele; + } - xfs_trans_buf_set_type(tp, bp, buf_type); - bp->b_ops = &xfs_rtbuf_ops; - memset(bp->b_addr, 0, mp->m_sb.sb_blocksize); - xfs_trans_log_buf(tp, bp, 0, mp->m_sb.sb_blocksize - 1); - /* - * Commit the transaction. - */ - error = xfs_trans_commit(tp); - if (error) - return error; - } - /* - * Go on to the next extent, if any. - */ - oblocks = map.br_startoff + map.br_blockcount; + for (bmbno = xfs_last_rt_bmblock(rtg); bmbno < bmblocks; bmbno++) { + error = xfs_growfs_rt_bmblock(rtg, nrblocks, rextsize, bmbno); + if (error) + goto out_error; } - return 0; + kvfree(old_rsum_cache); + goto out_rele; -out_trans_cancel: - xfs_trans_cancel(tp); +out_error: + /* + * Reset rtg_extents to the old value if adding more blocks failed. + */ + xfs_rtgroup_calc_geometry(mp, rtg, rtg_rgno(rtg), mp->m_sb.sb_rgcount, + mp->m_sb.sb_rextents); + if (old_rsum_cache) { + kvfree(rtg->rtg_rsum_cache); + rtg->rtg_rsum_cache = old_rsum_cache; + } +out_rele: + xfs_rtgroup_rele(rtg); return error; } -static void -xfs_alloc_rsum_cache( - xfs_mount_t *mp, /* file system mount structure */ - xfs_extlen_t rbmblocks) /* number of rt bitmap blocks */ +int +xfs_growfs_check_rtgeom( + const struct xfs_mount *mp, + xfs_rfsblock_t dblocks, + xfs_rfsblock_t rblocks, + xfs_extlen_t rextsize) { + xfs_extlen_t min_logfsbs; + struct xfs_mount *nmp; + + nmp = xfs_growfs_rt_alloc_fake_mount(mp, rblocks, rextsize); + if (!nmp) + return -ENOMEM; + nmp->m_sb.sb_dblocks = dblocks; + + xfs_rtrmapbt_compute_maxlevels(nmp); + xfs_rtrefcountbt_compute_maxlevels(nmp); + xfs_trans_resv_calc(nmp, M_RES(nmp)); + /* - * The rsum cache is initialized to the maximum value, which is - * trivially an upper bound on the maximum level with any free extents. - * We can continue without the cache if it couldn't be allocated. + * New summary size can't be more than half the size of the log. This + * prevents us from getting a log overflow, since we'll log basically + * the whole summary file at once. */ - mp->m_rsum_cache = kvmalloc(rbmblocks, GFP_KERNEL); - if (mp->m_rsum_cache) - memset(mp->m_rsum_cache, -1, rbmblocks); - else - xfs_warn(mp, "could not allocate realtime summary cache"); + min_logfsbs = min_t(xfs_extlen_t, xfs_log_calc_minimum_size(nmp), + nmp->m_rsumblocks * 2); + + kfree(nmp); + + trace_xfs_growfs_check_rtgeom(mp, min_logfsbs); + + if (min_logfsbs > mp->m_sb.sb_logblocks) + return -EINVAL; + + if (xfs_has_zoned(mp)) { + uint32_t gblocks = mp->m_groups[XG_TYPE_RTG].blocks; + uint32_t rem; + + if (rextsize != 1) + return -EINVAL; + div_u64_rem(mp->m_sb.sb_rblocks, gblocks, &rem); + if (rem) { + xfs_warn(mp, +"new RT volume size (%lld) not aligned to RT group size (%d)", + mp->m_sb.sb_rblocks, gblocks); + return -EINVAL; + } + } + + return 0; +} + +/* + * Compute the new number of rt groups and ensure that /rtgroups exists. + * + * Changing the rtgroup size is not allowed (even if the rt volume hasn't yet + * been initialized) because the userspace ABI doesn't support it. + */ +static int +xfs_growfs_rt_prep_groups( + struct xfs_mount *mp, + xfs_rfsblock_t rblocks, + xfs_extlen_t rextsize, + xfs_rgnumber_t *new_rgcount) +{ + int error; + + *new_rgcount = howmany_64(rblocks, mp->m_sb.sb_rgextents * rextsize); + if (*new_rgcount > XFS_MAX_RGNUMBER) + return -EINVAL; + + /* Make sure the /rtgroups dir has been created */ + if (!mp->m_rtdirip) { + struct xfs_trans *tp; + + error = xfs_trans_alloc_empty(mp, &tp); + if (error) + return error; + error = xfs_rtginode_load_parent(tp); + xfs_trans_cancel(tp); + + if (error == -ENOENT) + error = xfs_rtginode_mkdir_parent(mp); + if (error) + return error; + } + + return 0; +} + +static bool +xfs_grow_last_rtg( + struct xfs_mount *mp) +{ + if (!xfs_has_rtgroups(mp)) + return true; + if (mp->m_sb.sb_rgcount == 0) + return false; + return xfs_rtgroup_extents(mp, mp->m_sb.sb_rgcount - 1) <= + mp->m_sb.sb_rgextents; } /* - * Visible (exported) functions. + * Read in the last block of the RT device to make sure it is accessible. */ +static int +xfs_rt_check_size( + struct xfs_mount *mp, + xfs_rfsblock_t last_block) +{ + xfs_daddr_t daddr = XFS_FSB_TO_BB(mp, last_block); + struct xfs_buf *bp; + int error; + + if (XFS_BB_TO_FSB(mp, daddr) != last_block) { + xfs_warn(mp, "RT device size overflow: %llu != %llu", + XFS_BB_TO_FSB(mp, daddr), last_block); + return -EFBIG; + } + + error = xfs_buf_read_uncached(mp->m_rtdev_targp, + XFS_FSB_TO_BB(mp, mp->m_sb.sb_rtstart) + daddr, + XFS_FSB_TO_BB(mp, 1), &bp, NULL); + if (error) + xfs_warn(mp, "cannot read last RT device sector (%lld)", + last_block); + else + xfs_buf_relse(bp); + return error; +} /* * Grow the realtime area of the filesystem. */ int xfs_growfs_rt( - xfs_mount_t *mp, /* mount point for filesystem */ - xfs_growfs_rt_t *in) /* growfs rt input struct */ + struct xfs_mount *mp, + struct xfs_growfs_rt *in) { - xfs_fileoff_t bmbno; /* bitmap block number */ - struct xfs_buf *bp; /* temporary buffer */ - int error; /* error return value */ - xfs_mount_t *nmp; /* new (fake) mount structure */ - xfs_rfsblock_t nrblocks; /* new number of realtime blocks */ - xfs_extlen_t nrbmblocks; /* new number of rt bitmap blocks */ - xfs_rtxnum_t nrextents; /* new number of realtime extents */ - uint8_t nrextslog; /* new log2 of sb_rextents */ - xfs_extlen_t nrsumblocks; /* new number of summary blocks */ - uint nrsumlevels; /* new rt summary levels */ - uint nrsumsize; /* new size of rt summary, bytes */ - xfs_sb_t *nsbp; /* new superblock */ - xfs_extlen_t rbmblocks; /* current number of rt bitmap blocks */ - xfs_extlen_t rsumblocks; /* current number of rt summary blks */ - xfs_sb_t *sbp; /* old superblock */ - uint8_t *rsum_cache; /* old summary cache */ - - sbp = &mp->m_sb; + xfs_rgnumber_t old_rgcount = mp->m_sb.sb_rgcount; + xfs_rgnumber_t new_rgcount = 1; + xfs_rgnumber_t rgno; + xfs_agblock_t old_rextsize = mp->m_sb.sb_rextsize; + int error; if (!capable(CAP_SYS_ADMIN)) return -EPERM; @@ -825,302 +1381,191 @@ xfs_growfs_rt( /* Needs to have been mounted with an rt device. */ if (!XFS_IS_REALTIME_MOUNT(mp)) return -EINVAL; - /* - * Mount should fail if the rt bitmap/summary files don't load, but - * we'll check anyway. - */ - if (!mp->m_rbmip || !mp->m_rsumip) - return -EINVAL; - /* Shrink not supported. */ - if (in->newblocks <= sbp->sb_rblocks) - return -EINVAL; + if (!mutex_trylock(&mp->m_growlock)) + return -EWOULDBLOCK; + /* Shrink not supported. */ + error = -EINVAL; + if (in->newblocks <= mp->m_sb.sb_rblocks) + goto out_unlock; /* Can only change rt extent size when adding rt volume. */ - if (sbp->sb_rblocks > 0 && in->extsize != sbp->sb_rextsize) - return -EINVAL; + if (mp->m_sb.sb_rblocks > 0 && in->extsize != mp->m_sb.sb_rextsize) + goto out_unlock; /* Range check the extent size. */ if (XFS_FSB_TO_B(mp, in->extsize) > XFS_MAX_RTEXTSIZE || XFS_FSB_TO_B(mp, in->extsize) < XFS_MIN_RTEXTSIZE) - return -EINVAL; + goto out_unlock; - /* Unsupported realtime features. */ - if (xfs_has_rmapbt(mp) || xfs_has_reflink(mp) || xfs_has_quota(mp)) - return -EOPNOTSUPP; + /* Check for features supported only on rtgroups filesystems. */ + error = -EOPNOTSUPP; + if (!xfs_has_rtgroups(mp)) { + if (xfs_has_rmapbt(mp)) + goto out_unlock; + if (xfs_has_quota(mp)) + goto out_unlock; + if (xfs_has_reflink(mp)) + goto out_unlock; + } else if (xfs_has_reflink(mp) && + !xfs_reflink_supports_rextsize(mp, in->extsize)) + goto out_unlock; - nrblocks = in->newblocks; - error = xfs_sb_validate_fsb_count(sbp, nrblocks); + error = xfs_sb_validate_fsb_count(&mp->m_sb, in->newblocks); if (error) - return error; - /* - * Read in the last block of the device, make sure it exists. - */ - error = xfs_buf_read_uncached(mp->m_rtdev_targp, - XFS_FSB_TO_BB(mp, nrblocks - 1), - XFS_FSB_TO_BB(mp, 1), 0, &bp, NULL); + goto out_unlock; + + error = xfs_rt_check_size(mp, in->newblocks - 1); if (error) - return error; - xfs_buf_relse(bp); + goto out_unlock; /* * Calculate new parameters. These are the final values to be reached. */ - nrextents = nrblocks; - do_div(nrextents, in->extsize); - if (!xfs_validate_rtextents(nrextents)) - return -EINVAL; - nrbmblocks = xfs_rtbitmap_blockcount(mp, nrextents); - nrextslog = xfs_compute_rextslog(nrextents); - nrsumlevels = nrextslog + 1; - nrsumblocks = xfs_rtsummary_blockcount(mp, nrsumlevels, nrbmblocks); - nrsumsize = XFS_FSB_TO_B(mp, nrsumblocks); - /* - * New summary size can't be more than half the size of - * the log. This prevents us from getting a log overflow, - * since we'll log basically the whole summary file at once. - */ - if (nrsumblocks > (mp->m_sb.sb_logblocks >> 1)) - return -EINVAL; - /* - * Get the old block counts for bitmap and summary inodes. - * These can't change since other growfs callers are locked out. - */ - rbmblocks = XFS_B_TO_FSB(mp, mp->m_rbmip->i_disk_size); - rsumblocks = XFS_B_TO_FSB(mp, mp->m_rsumip->i_disk_size); - /* - * Allocate space to the bitmap and summary files, as necessary. - */ - error = xfs_growfs_rt_alloc(mp, rbmblocks, nrbmblocks, mp->m_rbmip); - if (error) - return error; - error = xfs_growfs_rt_alloc(mp, rsumblocks, nrsumblocks, mp->m_rsumip); + error = -EINVAL; + if (in->newblocks < in->extsize) + goto out_unlock; + + /* Make sure the new fs size won't cause problems with the log. */ + error = xfs_growfs_check_rtgeom(mp, mp->m_sb.sb_dblocks, in->newblocks, + in->extsize); if (error) - return error; + goto out_unlock; - rsum_cache = mp->m_rsum_cache; - if (nrbmblocks != sbp->sb_rbmblocks) - xfs_alloc_rsum_cache(mp, nrbmblocks); + if (xfs_has_rtgroups(mp)) { + error = xfs_growfs_rt_prep_groups(mp, in->newblocks, + in->extsize, &new_rgcount); + if (error) + goto out_unlock; + } - /* - * Allocate a new (fake) mount/sb. - */ - nmp = kmalloc(sizeof(*nmp), GFP_KERNEL | __GFP_NOFAIL); - /* - * Loop over the bitmap blocks. - * We will do everything one bitmap block at a time. - * Skip the current block if it is exactly full. - * This also deals with the case where there were no rtextents before. - */ - for (bmbno = sbp->sb_rbmblocks - - ((sbp->sb_rextents & ((1 << mp->m_blkbit_log) - 1)) != 0); - bmbno < nrbmblocks; - bmbno++) { - struct xfs_rtalloc_args args = { - .mp = mp, - }; - struct xfs_rtalloc_args nargs = { - .mp = nmp, - }; - struct xfs_trans *tp; - xfs_rfsblock_t nrblocks_step; + if (xfs_grow_last_rtg(mp)) { + error = xfs_growfs_rtg(mp, old_rgcount - 1, in->newblocks, + in->extsize); + if (error) + goto out_unlock; + } - *nmp = *mp; - nsbp = &nmp->m_sb; - /* - * Calculate new sb and mount fields for this round. - */ - nsbp->sb_rextsize = in->extsize; - nmp->m_rtxblklog = -1; /* don't use shift or masking */ - nsbp->sb_rbmblocks = bmbno + 1; - nrblocks_step = (bmbno + 1) * NBBY * nsbp->sb_blocksize * - nsbp->sb_rextsize; - nsbp->sb_rblocks = min(nrblocks, nrblocks_step); - nsbp->sb_rextents = xfs_rtb_to_rtx(nmp, nsbp->sb_rblocks); - ASSERT(nsbp->sb_rextents != 0); - nsbp->sb_rextslog = xfs_compute_rextslog(nsbp->sb_rextents); - nrsumlevels = nmp->m_rsumlevels = nsbp->sb_rextslog + 1; - nrsumblocks = xfs_rtsummary_blockcount(mp, nrsumlevels, - nsbp->sb_rbmblocks); - nmp->m_rsumsize = nrsumsize = XFS_FSB_TO_B(mp, nrsumblocks); - /* recompute growfsrt reservation from new rsumsize */ - xfs_trans_resv_calc(nmp, &nmp->m_resv); + for (rgno = old_rgcount; rgno < new_rgcount; rgno++) { + xfs_rtbxlen_t rextents = div_u64(in->newblocks, in->extsize); - /* - * Start a transaction, get the log reservation. - */ - error = xfs_trans_alloc(mp, &M_RES(mp)->tr_growrtfree, 0, 0, 0, - &tp); + error = xfs_rtgroup_alloc(mp, rgno, new_rgcount, rextents); if (error) - break; - args.tp = tp; - nargs.tp = tp; + goto out_unlock; - /* - * Lock out other callers by grabbing the bitmap inode lock. - */ - xfs_ilock(mp->m_rbmip, XFS_ILOCK_EXCL | XFS_ILOCK_RTBITMAP); - xfs_trans_ijoin(tp, mp->m_rbmip, XFS_ILOCK_EXCL); - /* - * Update the bitmap inode's size ondisk and incore. We need - * to update the incore size so that inode inactivation won't - * punch what it thinks are "posteof" blocks. - */ - mp->m_rbmip->i_disk_size = - nsbp->sb_rbmblocks * nsbp->sb_blocksize; - i_size_write(VFS_I(mp->m_rbmip), mp->m_rbmip->i_disk_size); - xfs_trans_log_inode(tp, mp->m_rbmip, XFS_ILOG_CORE); - /* - * Get the summary inode into the transaction. - */ - xfs_ilock(mp->m_rsumip, XFS_ILOCK_EXCL | XFS_ILOCK_RTSUM); - xfs_trans_ijoin(tp, mp->m_rsumip, XFS_ILOCK_EXCL); - /* - * Update the summary inode's size. We need to update the - * incore size so that inode inactivation won't punch what it - * thinks are "posteof" blocks. - */ - mp->m_rsumip->i_disk_size = nmp->m_rsumsize; - i_size_write(VFS_I(mp->m_rsumip), mp->m_rsumip->i_disk_size); - xfs_trans_log_inode(tp, mp->m_rsumip, XFS_ILOG_CORE); - /* - * Copy summary data from old to new sizes. - * Do this when the real size (not block-aligned) changes. - */ - if (sbp->sb_rbmblocks != nsbp->sb_rbmblocks || - mp->m_rsumlevels != nmp->m_rsumlevels) { - error = xfs_rtcopy_summary(&args, &nargs); - if (error) - goto error_cancel; - } - /* - * Update superblock fields. - */ - if (nsbp->sb_rextsize != sbp->sb_rextsize) - xfs_trans_mod_sb(tp, XFS_TRANS_SB_REXTSIZE, - nsbp->sb_rextsize - sbp->sb_rextsize); - if (nsbp->sb_rbmblocks != sbp->sb_rbmblocks) - xfs_trans_mod_sb(tp, XFS_TRANS_SB_RBMBLOCKS, - nsbp->sb_rbmblocks - sbp->sb_rbmblocks); - if (nsbp->sb_rblocks != sbp->sb_rblocks) - xfs_trans_mod_sb(tp, XFS_TRANS_SB_RBLOCKS, - nsbp->sb_rblocks - sbp->sb_rblocks); - if (nsbp->sb_rextents != sbp->sb_rextents) - xfs_trans_mod_sb(tp, XFS_TRANS_SB_REXTENTS, - nsbp->sb_rextents - sbp->sb_rextents); - if (nsbp->sb_rextslog != sbp->sb_rextslog) - xfs_trans_mod_sb(tp, XFS_TRANS_SB_REXTSLOG, - nsbp->sb_rextslog - sbp->sb_rextslog); - /* - * Free new extent. - */ - error = xfs_rtfree_range(&nargs, sbp->sb_rextents, - nsbp->sb_rextents - sbp->sb_rextents); - xfs_rtbuf_cache_relse(&nargs); + error = xfs_growfs_rtg(mp, rgno, in->newblocks, in->extsize); if (error) { -error_cancel: - xfs_trans_cancel(tp); - break; - } - /* - * Mark more blocks free in the superblock. - */ - xfs_trans_mod_sb(tp, XFS_TRANS_SB_FREXTENTS, - nsbp->sb_rextents - sbp->sb_rextents); - /* - * Update mp values into the real mp structure. - */ - mp->m_rsumlevels = nrsumlevels; - mp->m_rsumsize = nrsumsize; - /* recompute growfsrt reservation from new rsumsize */ - xfs_trans_resv_calc(mp, &mp->m_resv); + struct xfs_rtgroup *rtg; - error = xfs_trans_commit(tp); - if (error) + rtg = xfs_rtgroup_grab(mp, rgno); + if (!WARN_ON_ONCE(!rtg)) { + xfs_rtunmount_rtg(rtg); + xfs_rtgroup_rele(rtg); + xfs_rtgroup_free(mp, rgno); + } break; - - /* Ensure the mount RT feature flag is now set. */ - mp->m_features |= XFS_FEAT_REALTIME; + } } - if (error) - goto out_free; - /* Update secondary superblocks now the physical grow has completed */ - error = xfs_update_secondary_sbs(mp); + if (!error && old_rextsize != in->extsize) + error = xfs_growfs_rt_fixup_extsize(mp); -out_free: /* - * Free the fake mp structure. + * Update secondary superblocks now the physical grow has completed. + * + * Also do this in case of an error as we might have already + * successfully updated one or more RTGs and incremented sb_rgcount. */ - kfree(nmp); + if (!xfs_is_shutdown(mp)) { + int error2 = xfs_update_secondary_sbs(mp); - /* - * If we had to allocate a new rsum_cache, we either need to free the - * old one (if we succeeded) or free the new one and restore the old one - * (if there was an error). - */ - if (rsum_cache != mp->m_rsum_cache) { - if (error) { - kvfree(mp->m_rsum_cache); - mp->m_rsum_cache = rsum_cache; - } else { - kvfree(rsum_cache); - } + if (!error) + error = error2; + + /* Reset the rt metadata btree space reservations. */ + error2 = xfs_metafile_resv_init(mp); + if (error2 && error2 != -ENOSPC) + error = error2; } +out_unlock: + mutex_unlock(&mp->m_growlock); return error; } -/* - * Initialize realtime fields in the mount structure. - */ -int /* error */ -xfs_rtmount_init( - struct xfs_mount *mp) /* file system mount structure */ +/* Read the realtime superblock and attach it to the mount. */ +int +xfs_rtmount_readsb( + struct xfs_mount *mp) { - struct xfs_buf *bp; /* buffer for last block of subvolume */ - struct xfs_sb *sbp; /* filesystem superblock copy in mount */ - xfs_daddr_t d; /* address of last block of subvolume */ - unsigned int rsumblocks; + struct xfs_buf *bp; int error; - sbp = &mp->m_sb; - if (sbp->sb_rblocks == 0) + if (!xfs_has_rtsb(mp)) + return 0; + if (mp->m_sb.sb_rblocks == 0) return 0; if (mp->m_rtdev_targp == NULL) { xfs_warn(mp, "Filesystem has a realtime volume, use rtdev=device option"); return -ENODEV; } - mp->m_rsumlevels = sbp->sb_rextslog + 1; - rsumblocks = xfs_rtsummary_blockcount(mp, mp->m_rsumlevels, - mp->m_sb.sb_rbmblocks); - mp->m_rsumsize = XFS_FSB_TO_B(mp, rsumblocks); - mp->m_rbmip = mp->m_rsumip = NULL; - /* - * Check that the realtime section is an ok size. - */ - d = (xfs_daddr_t)XFS_FSB_TO_BB(mp, mp->m_sb.sb_rblocks); - if (XFS_BB_TO_FSB(mp, d) != mp->m_sb.sb_rblocks) { - xfs_warn(mp, "realtime mount -- %llu != %llu", - (unsigned long long) XFS_BB_TO_FSB(mp, d), - (unsigned long long) mp->m_sb.sb_rblocks); - return -EFBIG; - } - error = xfs_buf_read_uncached(mp->m_rtdev_targp, - d - XFS_FSB_TO_BB(mp, 1), - XFS_FSB_TO_BB(mp, 1), 0, &bp, NULL); + + /* m_blkbb_log is not set up yet */ + error = xfs_buf_read_uncached(mp->m_rtdev_targp, XFS_RTSB_DADDR, + mp->m_sb.sb_blocksize >> BBSHIFT, &bp, + &xfs_rtsb_buf_ops); if (error) { - xfs_warn(mp, "realtime device size check failed"); + xfs_warn(mp, "rt sb validate failed with error %d.", error); + /* bad CRC means corrupted metadata */ + if (error == -EFSBADCRC) + error = -EFSCORRUPTED; return error; } - xfs_buf_relse(bp); + + mp->m_rtsb_bp = bp; + xfs_buf_unlock(bp); return 0; } +/* Detach the realtime superblock from the mount and free it. */ +void +xfs_rtmount_freesb( + struct xfs_mount *mp) +{ + struct xfs_buf *bp = mp->m_rtsb_bp; + + if (!bp) + return; + + xfs_buf_lock(bp); + mp->m_rtsb_bp = NULL; + xfs_buf_relse(bp); +} + +/* + * Initialize realtime fields in the mount structure. + */ +int /* error */ +xfs_rtmount_init( + struct xfs_mount *mp) /* file system mount structure */ +{ + if (mp->m_sb.sb_rblocks == 0) + return 0; + if (mp->m_rtdev_targp == NULL) { + xfs_warn(mp, + "Filesystem has a realtime volume, use rtdev=device option"); + return -ENODEV; + } + + mp->m_rsumblocks = xfs_rtsummary_blockcount(mp, &mp->m_rsumlevels); + + return xfs_rt_check_size(mp, mp->m_sb.sb_rblocks - 1); +} + static int xfs_rtalloc_count_frextent( - struct xfs_mount *mp, + struct xfs_rtgroup *rtg, struct xfs_trans *tp, const struct xfs_rtalloc_rec *rec, void *priv) @@ -1142,17 +1587,23 @@ xfs_rtalloc_reinit_frextents( uint64_t val = 0; int error; - xfs_ilock(mp->m_rbmip, XFS_ILOCK_SHARED | XFS_ILOCK_RTBITMAP); - error = xfs_rtalloc_query_all(mp, NULL, xfs_rtalloc_count_frextent, - &val); - xfs_iunlock(mp->m_rbmip, XFS_ILOCK_SHARED | XFS_ILOCK_RTBITMAP); - if (error) - return error; + struct xfs_rtgroup *rtg = NULL; + + while ((rtg = xfs_rtgroup_next(mp, rtg))) { + xfs_rtgroup_lock(rtg, XFS_RTGLOCK_BITMAP_SHARED); + error = xfs_rtalloc_query_all(rtg, NULL, + xfs_rtalloc_count_frextent, &val); + xfs_rtgroup_unlock(rtg, XFS_RTGLOCK_BITMAP_SHARED); + if (error) { + xfs_rtgroup_rele(rtg); + return error; + } + } spin_lock(&mp->m_sb_lock); mp->m_sb.sb_frextents = val; spin_unlock(&mp->m_sb_lock); - percpu_counter_set(&mp->m_frextents, mp->m_sb.sb_frextents); + xfs_set_freecounter(mp, XC_FREE_RTEXTENTS, mp->m_sb.sb_frextents); return 0; } @@ -1163,17 +1614,12 @@ xfs_rtalloc_reinit_frextents( */ static inline int xfs_rtmount_iread_extents( - struct xfs_inode *ip, - unsigned int lock_class) + struct xfs_trans *tp, + struct xfs_inode *ip) { - struct xfs_trans *tp; int error; - error = xfs_trans_alloc_empty(ip->i_mount, &tp); - if (error) - return error; - - xfs_ilock(ip, XFS_ILOCK_EXCL | lock_class); + xfs_ilock(ip, XFS_ILOCK_EXCL); error = xfs_iread_extents(tp, ip, XFS_DATA_FORK); if (error) @@ -1186,52 +1632,69 @@ xfs_rtmount_iread_extents( } out_unlock: - xfs_iunlock(ip, XFS_ILOCK_EXCL | lock_class); - xfs_trans_cancel(tp); + xfs_iunlock(ip, XFS_ILOCK_EXCL); return error; } +static int +xfs_rtmount_rtg( + struct xfs_mount *mp, + struct xfs_trans *tp, + struct xfs_rtgroup *rtg) +{ + int error, i; + + for (i = 0; i < XFS_RTGI_MAX; i++) { + error = xfs_rtginode_load(rtg, i, tp); + if (error) + return error; + + if (rtg->rtg_inodes[i]) { + error = xfs_rtmount_iread_extents(tp, + rtg->rtg_inodes[i]); + if (error) + return error; + } + } + + if (xfs_has_zoned(mp)) + return 0; + return xfs_alloc_rsum_cache(rtg, mp->m_sb.sb_rbmblocks); +} + /* * Get the bitmap and summary inodes and the summary cache into the mount * structure at mount time. */ -int /* error */ +int xfs_rtmount_inodes( - xfs_mount_t *mp) /* file system mount structure */ + struct xfs_mount *mp) { - int error; /* error return value */ - xfs_sb_t *sbp; + struct xfs_trans *tp; + struct xfs_rtgroup *rtg = NULL; + int error; - sbp = &mp->m_sb; - error = xfs_iget(mp, NULL, sbp->sb_rbmino, 0, 0, &mp->m_rbmip); - if (xfs_metadata_is_sick(error)) - xfs_rt_mark_sick(mp, XFS_SICK_RT_BITMAP); + error = xfs_trans_alloc_empty(mp, &tp); if (error) return error; - ASSERT(mp->m_rbmip != NULL); - error = xfs_rtmount_iread_extents(mp->m_rbmip, XFS_ILOCK_RTBITMAP); - if (error) - goto out_rele_bitmap; - - error = xfs_iget(mp, NULL, sbp->sb_rsumino, 0, 0, &mp->m_rsumip); - if (xfs_metadata_is_sick(error)) - xfs_rt_mark_sick(mp, XFS_SICK_RT_SUMMARY); - if (error) - goto out_rele_bitmap; - ASSERT(mp->m_rsumip != NULL); - - error = xfs_rtmount_iread_extents(mp->m_rsumip, XFS_ILOCK_RTSUM); - if (error) - goto out_rele_summary; + if (xfs_has_rtgroups(mp) && mp->m_sb.sb_rgcount > 0) { + error = xfs_rtginode_load_parent(tp); + if (error) + goto out_cancel; + } - xfs_alloc_rsum_cache(mp, sbp->sb_rbmblocks); - return 0; + while ((rtg = xfs_rtgroup_next(mp, rtg))) { + error = xfs_rtmount_rtg(mp, tp, rtg); + if (error) { + xfs_rtgroup_rele(rtg); + xfs_rtunmount_inodes(mp); + break; + } + } -out_rele_summary: - xfs_irele(mp->m_rsumip); -out_rele_bitmap: - xfs_irele(mp->m_rbmip); +out_cancel: + xfs_trans_cancel(tp); return error; } @@ -1239,11 +1702,11 @@ void xfs_rtunmount_inodes( struct xfs_mount *mp) { - kvfree(mp->m_rsum_cache); - if (mp->m_rbmip) - xfs_irele(mp->m_rbmip); - if (mp->m_rsumip) - xfs_irele(mp->m_rsumip); + struct xfs_rtgroup *rtg = NULL; + + while ((rtg = xfs_rtgroup_next(mp, rtg))) + xfs_rtunmount_rtg(rtg); + xfs_rtginode_irele(&mp->m_rtdirip); } /* @@ -1253,31 +1716,31 @@ xfs_rtunmount_inodes( * of rtextents and the fraction. * The fraction sequence is 0, 1/2, 1/4, 3/4, 1/8, ..., 7/8, 1/16, ... */ -static int +static xfs_rtxnum_t xfs_rtpick_extent( - xfs_mount_t *mp, /* file system mount point */ - xfs_trans_t *tp, /* transaction pointer */ - xfs_rtxlen_t len, /* allocation length (rtextents) */ - xfs_rtxnum_t *pick) /* result rt extent */ + struct xfs_rtgroup *rtg, + struct xfs_trans *tp, + xfs_rtxlen_t len) /* allocation length (rtextents) */ { - xfs_rtxnum_t b; /* result rtext */ + struct xfs_mount *mp = rtg_mount(rtg); + struct xfs_inode *rbmip = rtg_bitmap(rtg); + xfs_rtxnum_t b = 0; /* result rtext */ int log2; /* log of sequence number */ uint64_t resid; /* residual after log removed */ uint64_t seq; /* sequence number of file creation */ struct timespec64 ts; /* timespec in inode */ - xfs_assert_ilocked(mp->m_rbmip, XFS_ILOCK_EXCL); + xfs_assert_ilocked(rbmip, XFS_ILOCK_EXCL); - ts = inode_get_atime(VFS_I(mp->m_rbmip)); - if (!(mp->m_rbmip->i_diflags & XFS_DIFLAG_NEWRTBM)) { - mp->m_rbmip->i_diflags |= XFS_DIFLAG_NEWRTBM; + ts = inode_get_atime(VFS_I(rbmip)); + if (!(rbmip->i_diflags & XFS_DIFLAG_NEWRTBM)) { + rbmip->i_diflags |= XFS_DIFLAG_NEWRTBM; seq = 0; } else { seq = ts.tv_sec; } - if ((log2 = xfs_highbit64(seq)) == -1) - b = 0; - else { + log2 = xfs_highbit64(seq); + if (log2 != -1) { resid = seq - (1ULL << log2); b = (mp->m_sb.sb_rextents * ((resid << 1) + 1ULL)) >> (log2 + 1); @@ -1287,10 +1750,9 @@ xfs_rtpick_extent( b = mp->m_sb.sb_rextents - len; } ts.tv_sec = seq + 1; - inode_set_atime_to_ts(VFS_I(mp->m_rbmip), ts); - xfs_trans_log_inode(tp, mp->m_rbmip, XFS_ILOG_CORE); - *pick = b; - return 0; + inode_set_atime_to_ts(VFS_I(rbmip), ts); + xfs_trans_log_inode(tp, rbmip, XFS_ILOG_CORE); + return b; } static void @@ -1322,34 +1784,306 @@ xfs_rtalloc_align_minmax( *raminlen = newminlen; } +/* Given a free extent, find any part of it that isn't busy, if possible. */ +STATIC bool +xfs_rtalloc_check_busy( + struct xfs_rtalloc_args *args, + xfs_rtxnum_t start, + xfs_rtxlen_t minlen_rtx, + xfs_rtxlen_t maxlen_rtx, + xfs_rtxlen_t len_rtx, + xfs_rtxlen_t prod, + xfs_rtxnum_t rtx, + xfs_rtxlen_t *reslen, + xfs_rtxnum_t *resrtx, + unsigned *busy_gen) +{ + struct xfs_rtgroup *rtg = args->rtg; + struct xfs_mount *mp = rtg_mount(rtg); + xfs_agblock_t rgbno = xfs_rtx_to_rgbno(rtg, rtx); + xfs_rgblock_t min_rgbno = xfs_rtx_to_rgbno(rtg, start); + xfs_extlen_t minlen = xfs_rtxlen_to_extlen(mp, minlen_rtx); + xfs_extlen_t len = xfs_rtxlen_to_extlen(mp, len_rtx); + xfs_extlen_t diff; + bool busy; + + busy = xfs_extent_busy_trim(rtg_group(rtg), minlen, + xfs_rtxlen_to_extlen(mp, maxlen_rtx), &rgbno, &len, + busy_gen); + + /* + * If we have a largish extent that happens to start before min_rgbno, + * see if we can shift it into range... + */ + if (rgbno < min_rgbno && rgbno + len > min_rgbno) { + diff = min_rgbno - rgbno; + if (len > diff) { + rgbno += diff; + len -= diff; + } + } + + if (prod > 1 && len >= minlen) { + xfs_rgblock_t aligned_rgbno = roundup(rgbno, prod); + + diff = aligned_rgbno - rgbno; + + *resrtx = xfs_rgbno_to_rtx(mp, aligned_rgbno); + *reslen = xfs_extlen_to_rtxlen(mp, + diff >= len ? 0 : len - diff); + } else { + *resrtx = xfs_rgbno_to_rtx(mp, rgbno); + *reslen = xfs_extlen_to_rtxlen(mp, len); + } + + return busy; +} + +/* + * Adjust the given free extent so that it isn't busy, or flush the log and + * wait for the space to become unbusy. Only needed for rtgroups. + */ +STATIC int +xfs_rtallocate_adjust_for_busy( + struct xfs_rtalloc_args *args, + xfs_rtxnum_t start, + xfs_rtxlen_t minlen, + xfs_rtxlen_t maxlen, + xfs_rtxlen_t *len, + xfs_rtxlen_t prod, + xfs_rtxnum_t *rtx) +{ + xfs_rtxnum_t resrtx; + xfs_rtxlen_t reslen; + unsigned busy_gen; + bool busy; + int error; + +again: + busy = xfs_rtalloc_check_busy(args, start, minlen, maxlen, *len, prod, + *rtx, &reslen, &resrtx, &busy_gen); + if (!busy) + return 0; + + if (reslen < minlen || (start != 0 && resrtx != *rtx)) { + /* + * Enough of the extent was busy that we cannot satisfy the + * allocation, or this is a near allocation and the start of + * the extent is busy. Flush the log and wait for the busy + * situation to resolve. + */ + trace_xfs_rtalloc_extent_busy(args->rtg, start, minlen, maxlen, + *len, prod, *rtx, busy_gen); + + error = xfs_extent_busy_flush(args->tp, rtg_group(args->rtg), + busy_gen, 0); + if (error) + return error; + + goto again; + } + + /* Some of the free space wasn't busy, hand that back to the caller. */ + trace_xfs_rtalloc_extent_busy_trim(args->rtg, *rtx, *len, resrtx, + reslen); + *len = reslen; + *rtx = resrtx; + + return 0; +} + +static int +xfs_rtallocate_rtg( + struct xfs_trans *tp, + xfs_rgnumber_t rgno, + xfs_rtblock_t bno_hint, + xfs_rtxlen_t minlen, + xfs_rtxlen_t maxlen, + xfs_rtxlen_t prod, + bool wasdel, + bool initial_user_data, + bool *rtlocked, + xfs_rtblock_t *bno, + xfs_extlen_t *blen) +{ + struct xfs_rtalloc_args args = { + .mp = tp->t_mountp, + .tp = tp, + }; + xfs_rtxnum_t start = 0; + xfs_rtxnum_t rtx; + xfs_rtxlen_t len = 0; + int error = 0; + + args.rtg = xfs_rtgroup_grab(args.mp, rgno); + if (!args.rtg) + return -ENOSPC; + + /* + * We need to lock out modifications to both the RT bitmap and summary + * inodes for finding free space in xfs_rtallocate_extent_{near,size} + * and join the bitmap and summary inodes for the actual allocation + * down in xfs_rtallocate_range. + * + * For RTG-enabled file system we don't want to join the inodes to the + * transaction until we are committed to allocate to allocate from this + * RTG so that only one inode of each type is locked at a time. + * + * But for pre-RTG file systems we need to already to join the bitmap + * inode to the transaction for xfs_rtpick_extent, which bumps the + * sequence number in it, so we'll have to join the inode to the + * transaction early here. + * + * This is all a bit messy, but at least the mess is contained in + * this function. + */ + if (!*rtlocked) { + xfs_rtgroup_lock(args.rtg, XFS_RTGLOCK_BITMAP); + if (!xfs_has_rtgroups(args.mp)) + xfs_rtgroup_trans_join(tp, args.rtg, + XFS_RTGLOCK_BITMAP); + *rtlocked = true; + } + + /* + * For an allocation to an empty file at offset 0, pick an extent that + * will space things out in the rt area. + */ + if (bno_hint != NULLFSBLOCK) + start = xfs_rtb_to_rtx(args.mp, bno_hint); + else if (!xfs_has_rtgroups(args.mp) && initial_user_data) + start = xfs_rtpick_extent(args.rtg, tp, maxlen); + + if (start) { + error = xfs_rtallocate_extent_near(&args, start, minlen, maxlen, + &len, prod, &rtx); + /* + * If we can't allocate near a specific rt extent, try again + * without locality criteria. + */ + if (error == -ENOSPC) { + xfs_rtbuf_cache_relse(&args); + error = 0; + } + } + + if (!error) { + error = xfs_rtallocate_extent_size(&args, minlen, maxlen, &len, + prod, &rtx); + } + + if (error) { + if (xfs_has_rtgroups(args.mp)) + goto out_unlock; + goto out_release; + } + + if (xfs_has_rtgroups(args.mp)) { + error = xfs_rtallocate_adjust_for_busy(&args, start, minlen, + maxlen, &len, prod, &rtx); + if (error) + goto out_unlock; + + xfs_rtgroup_trans_join(tp, args.rtg, XFS_RTGLOCK_BITMAP); + } + + error = xfs_rtallocate_range(&args, rtx, len); + if (error) + goto out_release; + + xfs_trans_mod_sb(tp, wasdel ? + XFS_TRANS_SB_RES_FREXTENTS : XFS_TRANS_SB_FREXTENTS, + -(long)len); + *bno = xfs_rtx_to_rtb(args.rtg, rtx); + *blen = xfs_rtxlen_to_extlen(args.mp, len); + +out_release: + xfs_rtgroup_rele(args.rtg); + xfs_rtbuf_cache_relse(&args); + return error; +out_unlock: + xfs_rtgroup_unlock(args.rtg, XFS_RTGLOCK_BITMAP); + *rtlocked = false; + goto out_release; +} + int -xfs_bmap_rtalloc( - struct xfs_bmalloca *ap) +xfs_rtallocate_rtgs( + struct xfs_trans *tp, + xfs_fsblock_t bno_hint, + xfs_rtxlen_t minlen, + xfs_rtxlen_t maxlen, + xfs_rtxlen_t prod, + bool wasdel, + bool initial_user_data, + xfs_rtblock_t *bno, + xfs_extlen_t *blen) +{ + struct xfs_mount *mp = tp->t_mountp; + xfs_rgnumber_t start_rgno, rgno; + int error; + + /* + * For now this just blindly iterates over the RTGs for an initial + * allocation. We could try to keep an in-memory rtg_longest member + * to avoid the locking when just looking for big enough free space, + * but for now this keeps things simple. + */ + if (bno_hint != NULLFSBLOCK) + start_rgno = xfs_rtb_to_rgno(mp, bno_hint); + else + start_rgno = (atomic_inc_return(&mp->m_rtgrotor) - 1) % + mp->m_sb.sb_rgcount; + + rgno = start_rgno; + do { + bool rtlocked = false; + + error = xfs_rtallocate_rtg(tp, rgno, bno_hint, minlen, maxlen, + prod, wasdel, initial_user_data, &rtlocked, + bno, blen); + if (error != -ENOSPC) + return error; + ASSERT(!rtlocked); + + if (++rgno == mp->m_sb.sb_rgcount) + rgno = 0; + bno_hint = NULLFSBLOCK; + } while (rgno != start_rgno); + + return -ENOSPC; +} + +static int +xfs_rtallocate_align( + struct xfs_bmalloca *ap, + xfs_rtxlen_t *ralen, + xfs_rtxlen_t *raminlen, + xfs_rtxlen_t *prod, + bool *noalign) { struct xfs_mount *mp = ap->ip->i_mount; xfs_fileoff_t orig_offset = ap->offset; - xfs_rtxnum_t start; /* allocation hint rtextent no */ - xfs_rtxnum_t rtx; /* actually allocated rtextent no */ - xfs_rtxlen_t prod = 0; /* product factor for allocators */ - xfs_extlen_t mod = 0; /* product factor for allocators */ - xfs_rtxlen_t ralen = 0; /* realtime allocation length */ - xfs_extlen_t align; /* minimum allocation alignment */ - xfs_extlen_t orig_length = ap->length; xfs_extlen_t minlen = mp->m_sb.sb_rextsize; - xfs_rtxlen_t raminlen; - bool rtlocked = false; - bool ignore_locality = false; - struct xfs_rtalloc_args args = { - .mp = mp, - .tp = ap->tp, - }; + xfs_extlen_t align; /* minimum allocation alignment */ + xfs_extlen_t mod; /* product factor for allocators */ int error; - align = xfs_get_extsz_hint(ap->ip); -retry: - error = xfs_bmap_extsize_align(mp, &ap->got, &ap->prev, - align, 1, ap->eof, 0, - ap->conv, &ap->offset, &ap->length); + if (*noalign) { + align = mp->m_sb.sb_rextsize; + } else { + if (ap->flags & XFS_BMAPI_COWFORK) + align = xfs_get_cowextsz_hint(ap->ip); + else + align = xfs_get_extsz_hint(ap->ip); + if (!align) + align = 1; + if (align == mp->m_sb.sb_rextsize) + *noalign = true; + } + + error = xfs_bmap_extsize_align(mp, &ap->got, &ap->prev, align, 1, + ap->eof, 0, ap->conv, &ap->offset, &ap->length); if (error) return error; ASSERT(ap->length); @@ -1373,62 +2107,64 @@ retry: * XFS_BMBT_MAX_EXTLEN), we don't hear about that number, and can't * adjust the starting point to match it. */ - ralen = xfs_extlen_to_rtxlen(mp, min(ap->length, XFS_MAX_BMBT_EXTLEN)); - raminlen = max_t(xfs_rtxlen_t, 1, xfs_extlen_to_rtxlen(mp, minlen)); - ASSERT(raminlen > 0); - ASSERT(raminlen <= ralen); - - /* - * Lock out modifications to both the RT bitmap and summary inodes - */ - if (!rtlocked) { - xfs_ilock(mp->m_rbmip, XFS_ILOCK_EXCL|XFS_ILOCK_RTBITMAP); - xfs_trans_ijoin(ap->tp, mp->m_rbmip, XFS_ILOCK_EXCL); - xfs_ilock(mp->m_rsumip, XFS_ILOCK_EXCL|XFS_ILOCK_RTSUM); - xfs_trans_ijoin(ap->tp, mp->m_rsumip, XFS_ILOCK_EXCL); - rtlocked = true; - } - - if (ignore_locality) { - start = 0; - } else if (xfs_bmap_adjacent(ap)) { - start = xfs_rtb_to_rtx(mp, ap->blkno); - } else if (ap->eof && ap->offset == 0) { - /* - * If it's an allocation to an empty file at offset 0, pick an - * extent that will space things out in the rt area. - */ - error = xfs_rtpick_extent(mp, ap->tp, ralen, &start); - if (error) - return error; - } else { - start = 0; - } + *ralen = xfs_extlen_to_rtxlen(mp, min(ap->length, XFS_MAX_BMBT_EXTLEN)); + *raminlen = max_t(xfs_rtxlen_t, 1, xfs_extlen_to_rtxlen(mp, minlen)); + ASSERT(*raminlen > 0); + ASSERT(*raminlen <= *ralen); /* * Only bother calculating a real prod factor if offset & length are * perfectly aligned, otherwise it will just get us in trouble. */ div_u64_rem(ap->offset, align, &mod); - if (mod || ap->length % align) { - prod = 1; - } else { - prod = xfs_extlen_to_rtxlen(mp, align); - if (prod > 1) - xfs_rtalloc_align_minmax(&raminlen, &ralen, &prod); - } + if (mod || ap->length % align) + *prod = 1; + else + *prod = xfs_extlen_to_rtxlen(mp, align); - if (start) { - error = xfs_rtallocate_extent_near(&args, start, raminlen, - ralen, &ralen, prod, &rtx); + if (*prod > 1) + xfs_rtalloc_align_minmax(raminlen, ralen, prod); + return 0; +} + +int +xfs_bmap_rtalloc( + struct xfs_bmalloca *ap) +{ + xfs_fileoff_t orig_offset = ap->offset; + xfs_rtxlen_t prod = 0; /* product factor for allocators */ + xfs_rtxlen_t ralen = 0; /* realtime allocation length */ + xfs_rtblock_t bno_hint = NULLRTBLOCK; + xfs_extlen_t orig_length = ap->length; + xfs_rtxlen_t raminlen; + bool rtlocked = false; + bool noalign = false; + bool initial_user_data = + ap->datatype & XFS_ALLOC_INITIAL_USER_DATA; + int error; + + ASSERT(!xfs_has_zoned(ap->tp->t_mountp)); + +retry: + error = xfs_rtallocate_align(ap, &ralen, &raminlen, &prod, &noalign); + if (error) + return error; + + if (xfs_bmap_adjacent(ap)) + bno_hint = ap->blkno; + + if (xfs_has_rtgroups(ap->ip->i_mount)) { + error = xfs_rtallocate_rtgs(ap->tp, bno_hint, raminlen, ralen, + prod, ap->wasdel, initial_user_data, + &ap->blkno, &ap->length); } else { - error = xfs_rtallocate_extent_size(&args, raminlen, - ralen, &ralen, prod, &rtx); + error = xfs_rtallocate_rtg(ap->tp, 0, bno_hint, raminlen, ralen, + prod, ap->wasdel, initial_user_data, + &rtlocked, &ap->blkno, &ap->length); } - xfs_rtbuf_cache_relse(&args); if (error == -ENOSPC) { - if (align > mp->m_sb.sb_rextsize) { + if (!noalign) { /* * We previously enlarged the request length to try to * satisfy an extent size hint. The allocator didn't @@ -1438,16 +2174,7 @@ retry: */ ap->offset = orig_offset; ap->length = orig_length; - minlen = align = mp->m_sb.sb_rextsize; - goto retry; - } - - if (!ignore_locality && start != 0) { - /* - * If we can't allocate near a specific rt extent, try - * again without locality criteria. - */ - ignore_locality = true; + noalign = true; goto retry; } @@ -1458,11 +2185,6 @@ retry: if (error) return error; - xfs_trans_mod_sb(ap->tp, ap->wasdel ? - XFS_TRANS_SB_RES_FREXTENTS : XFS_TRANS_SB_FREXTENTS, - -(long)ralen); - ap->blkno = xfs_rtx_to_rtb(mp, rtx); - ap->length = xfs_rtxlen_to_extlen(mp, ralen); xfs_bmap_alloc_account(ap); return 0; } |