From: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
Use the btree bulk loading functions to rebuild the free space btrees
and drop the open-coded implementation.
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
libxfs/libxfs_api_defs.h | 3
repair/phase5.c | 858 +++++++++++++---------------------------------
2 files changed, 247 insertions(+), 614 deletions(-)
diff --git a/libxfs/libxfs_api_defs.h b/libxfs/libxfs_api_defs.h
index 61047f8f..bace739c 100644
--- a/libxfs/libxfs_api_defs.h
+++ b/libxfs/libxfs_api_defs.h
@@ -24,6 +24,7 @@
#define xfs_alloc_ag_max_usable libxfs_alloc_ag_max_usable
#define xfs_allocbt_maxrecs libxfs_allocbt_maxrecs
+#define xfs_allocbt_stage_cursor libxfs_allocbt_stage_cursor
#define xfs_alloc_fix_freelist libxfs_alloc_fix_freelist
#define xfs_alloc_min_freelist libxfs_alloc_min_freelist
#define xfs_alloc_read_agf libxfs_alloc_read_agf
@@ -41,6 +42,8 @@
#define xfs_bmbt_maxrecs libxfs_bmbt_maxrecs
#define xfs_bmdr_maxrecs libxfs_bmdr_maxrecs
+#define xfs_btree_bload libxfs_btree_bload
+#define xfs_btree_bload_compute_geometry libxfs_btree_bload_compute_geometry
#define xfs_btree_del_cursor libxfs_btree_del_cursor
#define xfs_btree_init_block libxfs_btree_init_block
#define xfs_buf_delwri_submit libxfs_buf_delwri_submit
diff --git a/repair/phase5.c b/repair/phase5.c
index 7eb24519..94e4610c 100644
--- a/repair/phase5.c
+++ b/repair/phase5.c
@@ -80,6 +80,10 @@ struct bt_rebuild {
/* Tree-specific data. */
union {
struct xfs_slab_cursor *slab_cursor;
+ struct {
+ struct extent_tree_node *bno_rec;
+ xfs_agblock_t *freeblks;
+ };
};
};
@@ -97,7 +101,10 @@ static uint64_t *sb_ifree_ag; /* free inodes per ag */
static uint64_t *sb_fdblocks_ag; /* free data blocks per ag */
static int
-mk_incore_fstree(xfs_mount_t *mp, xfs_agnumber_t agno)
+mk_incore_fstree(
+ struct xfs_mount *mp,
+ xfs_agnumber_t agno,
+ unsigned int *num_freeblocks)
{
int in_extent;
int num_extents;
@@ -109,6 +116,8 @@ mk_incore_fstree(xfs_mount_t *mp, xfs_agnumber_t agno)
xfs_extlen_t blen;
int bstate;
+ *num_freeblocks = 0;
+
/*
* scan the bitmap for the ag looking for continuous
* extents of free blocks. At this point, we know
@@ -164,6 +173,7 @@ mk_incore_fstree(xfs_mount_t *mp, xfs_agnumber_t agno)
#endif
add_bno_extent(agno, extent_start, extent_len);
add_bcnt_extent(agno, extent_start, extent_len);
+ *num_freeblocks += extent_len;
}
}
}
@@ -177,6 +187,7 @@ mk_incore_fstree(xfs_mount_t *mp, xfs_agnumber_t agno)
#endif
add_bno_extent(agno, extent_start, extent_len);
add_bcnt_extent(agno, extent_start, extent_len);
+ *num_freeblocks += extent_len;
}
return(num_extents);
@@ -465,7 +476,7 @@ _("error - not enough free space in filesystem\n"));
/* Feed one of the new btree blocks to the bulk loader. */
static int
-rebuild_alloc_block(
+rebuild_claim_block(
struct xfs_btree_cur *cur,
union xfs_btree_ptr *ptr,
void *priv)
@@ -505,313 +516,32 @@ finish_cursor(bt_status_t *curs)
free(curs->btree_blocks);
}
+/*
+ * Scoop up leftovers from a rebuild cursor for later freeing, then free the
+ * rebuild context.
+ */
static void
finish_rebuild(
struct xfs_mount *mp,
- struct bt_rebuild *btr)
+ struct bt_rebuild *btr,
+ struct xfs_slab *lost_fsb)
{
struct xrep_newbt_resv *resv, *n;
for_each_xrep_newbt_reservation(&btr->newbt, resv, n) {
- xfs_agnumber_t agno;
- xfs_agblock_t bno;
- xfs_extlen_t len;
-
- if (resv->used >= resv->len)
- continue;
-
- /* XXX: Shouldn't this go on the AGFL? */
- /* Put back everything we didn't use. */
- bno = XFS_FSB_TO_AGBNO(mp, resv->fsbno + resv->used);
- agno = XFS_FSB_TO_AGNO(mp, resv->fsbno + resv->used);
- len = resv->len - resv->used;
-
- add_bno_extent(agno, bno, len);
- add_bcnt_extent(agno, bno, len);
- }
-
- xrep_newbt_destroy(&btr->newbt, 0);
-}
-
-/*
- * We need to leave some free records in the tree for the corner case of
- * setting up the AGFL. This may require allocation of blocks, and as
- * such can require insertion of new records into the tree (e.g. moving
- * a record in the by-count tree when a long extent is shortened). If we
- * pack the records into the leaves with no slack space, this requires a
- * leaf split to occur and a block to be allocated from the free list.
- * If we don't have any blocks on the free list (because we are setting
- * it up!), then we fail, and the filesystem will fail with the same
- * failure at runtime. Hence leave a couple of records slack space in
- * each block to allow immediate modification of the tree without
- * requiring splits to be done.
- *
- * XXX(hch): any reason we don't just look at mp->m_alloc_mxr?
- */
-#define XR_ALLOC_BLOCK_MAXRECS(mp, level) \
- (libxfs_allocbt_maxrecs((mp), (mp)->m_sb.sb_blocksize, (level) == 0) - 2)
-
-/*
- * this calculates a freespace cursor for an ag.
- * btree_curs is an in/out. returns the number of
- * blocks that will show up in the AGFL.
- */
-static int
-calculate_freespace_cursor(xfs_mount_t *mp, xfs_agnumber_t agno,
- xfs_agblock_t *extents, bt_status_t *btree_curs)
-{
- xfs_extlen_t blocks_needed; /* a running count */
- xfs_extlen_t blocks_allocated_pt; /* per tree */
- xfs_extlen_t blocks_allocated_total; /* for both trees */
- xfs_agblock_t num_extents;
- int i;
- int extents_used;
- int extra_blocks;
- bt_stat_level_t *lptr;
- bt_stat_level_t *p_lptr;
- extent_tree_node_t *ext_ptr;
- int level;
-
- num_extents = *extents;
- extents_used = 0;
-
- ASSERT(num_extents != 0);
-
- lptr = &btree_curs->level[0];
- btree_curs->init = 1;
+ while (resv->used < resv->len) {
+ xfs_fsblock_t fsb = resv->fsbno + resv->used;
+ int error;
- /*
- * figure out how much space we need for the leaf level
- * of the tree and set up the cursor for the leaf level
- * (note that the same code is duplicated further down)
- */
- lptr->num_blocks = howmany(num_extents, XR_ALLOC_BLOCK_MAXRECS(mp, 0));
- lptr->num_recs_pb = num_extents / lptr->num_blocks;
- lptr->modulo = num_extents % lptr->num_blocks;
- lptr->num_recs_tot = num_extents;
- level = 1;
-
-#ifdef XR_BLD_FREE_TRACE
- fprintf(stderr, "%s 0 %d %d %d %d\n", __func__,
- lptr->num_blocks,
- lptr->num_recs_pb,
- lptr->modulo,
- lptr->num_recs_tot);
-#endif
- /*
- * if we need more levels, set them up. # of records
- * per level is the # of blocks in the level below it
- */
- if (lptr->num_blocks > 1) {
- for (; btree_curs->level[level - 1].num_blocks > 1
- && level < XFS_BTREE_MAXLEVELS;
- level++) {
- lptr = &btree_curs->level[level];
- p_lptr = &btree_curs->level[level - 1];
- lptr->num_blocks = howmany(p_lptr->num_blocks,
- XR_ALLOC_BLOCK_MAXRECS(mp, level));
- lptr->modulo = p_lptr->num_blocks
- % lptr->num_blocks;
- lptr->num_recs_pb = p_lptr->num_blocks
- / lptr->num_blocks;
- lptr->num_recs_tot = p_lptr->num_blocks;
-#ifdef XR_BLD_FREE_TRACE
- fprintf(stderr, "%s %d %d %d %d %d\n", __func__,
- level,
- lptr->num_blocks,
- lptr->num_recs_pb,
- lptr->modulo,
- lptr->num_recs_tot);
-#endif
- }
- }
-
- ASSERT(lptr->num_blocks == 1);
- btree_curs->num_levels = level;
-
- /*
- * ok, now we have a hypothetical cursor that
- * will work for both the bno and bcnt trees.
- * now figure out if using up blocks to set up the
- * trees will perturb the shape of the freespace tree.
- * if so, we've over-allocated. the freespace trees
- * as they will be *after* accounting for the free space
- * we've used up will need fewer blocks to to represent
- * than we've allocated. We can use the AGFL to hold
- * xfs_agfl_size (sector/struct xfs_agfl) blocks but that's it.
- * Thus we limit things to xfs_agfl_size/2 for each of the 2 btrees.
- * if the number of extra blocks is more than that,
- * we'll have to be called again.
- */
- for (blocks_needed = 0, i = 0; i < level; i++) {
- blocks_needed += btree_curs->level[i].num_blocks;
- }
-
- /*
- * record the # of blocks we've allocated
- */
- blocks_allocated_pt = blocks_needed;
- blocks_needed *= 2;
- blocks_allocated_total = blocks_needed;
-
- /*
- * figure out how many free extents will be used up by
- * our space allocation
- */
- if ((ext_ptr = findfirst_bcnt_extent(agno)) == NULL)
- do_error(_("can't rebuild fs trees -- not enough free space "
- "on ag %u\n"), agno);
-
- while (ext_ptr != NULL && blocks_needed > 0) {
- if (ext_ptr->ex_blockcount <= blocks_needed) {
- blocks_needed -= ext_ptr->ex_blockcount;
- extents_used++;
- } else {
- blocks_needed = 0;
- }
-
- ext_ptr = findnext_bcnt_extent(agno, ext_ptr);
-
-#ifdef XR_BLD_FREE_TRACE
- if (ext_ptr != NULL) {
- fprintf(stderr, "got next extent [%u %u]\n",
- ext_ptr->ex_startblock, ext_ptr->ex_blockcount);
- } else {
- fprintf(stderr, "out of extents\n");
- }
-#endif
- }
- if (blocks_needed > 0)
- do_error(_("ag %u - not enough free space to build freespace "
- "btrees\n"), agno);
-
- ASSERT(num_extents >= extents_used);
-
- num_extents -= extents_used;
-
- /*
- * see if the number of leaf blocks will change as a result
- * of the number of extents changing
- */
- if (howmany(num_extents, XR_ALLOC_BLOCK_MAXRECS(mp, 0))
- != btree_curs->level[0].num_blocks) {
- /*
- * yes -- recalculate the cursor. If the number of
- * excess (overallocated) blocks is < xfs_agfl_size/2, we're ok.
- * we can put those into the AGFL. we don't try
- * and get things to converge exactly (reach a
- * state with zero excess blocks) because there
- * exist pathological cases which will never
- * converge. first, check for the zero-case.
- */
- if (num_extents == 0) {
- /*
- * ok, we've used up all the free blocks
- * trying to lay out the leaf level. go
- * to a one block (empty) btree and put the
- * already allocated blocks into the AGFL
- */
- if (btree_curs->level[0].num_blocks != 1) {
- /*
- * we really needed more blocks because
- * the old tree had more than one level.
- * this is bad.
- */
- do_warn(_("not enough free blocks left to "
- "describe all free blocks in AG "
- "%u\n"), agno);
- }
-#ifdef XR_BLD_FREE_TRACE
- fprintf(stderr,
- "ag %u -- no free extents, alloc'ed %d\n",
- agno, blocks_allocated_pt);
-#endif
- lptr->num_blocks = 1;
- lptr->modulo = 0;
- lptr->num_recs_pb = 0;
- lptr->num_recs_tot = 0;
-
- btree_curs->num_levels = 1;
-
- /*
- * don't reset the allocation stats, assume
- * they're all extra blocks
- * don't forget to return the total block count
- * not the per-tree block count. these are the
- * extras that will go into the AGFL. subtract
- * two for the root blocks.
- */
- btree_curs->num_tot_blocks = blocks_allocated_pt;
- btree_curs->num_free_blocks = blocks_allocated_pt;
-
- *extents = 0;
-
- return(blocks_allocated_total - 2);
- }
-
- lptr = &btree_curs->level[0];
- lptr->num_blocks = howmany(num_extents,
- XR_ALLOC_BLOCK_MAXRECS(mp, 0));
- lptr->num_recs_pb = num_extents / lptr->num_blocks;
- lptr->modulo = num_extents % lptr->num_blocks;
- lptr->num_recs_tot = num_extents;
- level = 1;
-
- /*
- * if we need more levels, set them up
- */
- if (lptr->num_blocks > 1) {
- for (level = 1; btree_curs->level[level-1].num_blocks
- > 1 && level < XFS_BTREE_MAXLEVELS;
- level++) {
- lptr = &btree_curs->level[level];
- p_lptr = &btree_curs->level[level-1];
- lptr->num_blocks = howmany(p_lptr->num_blocks,
- XR_ALLOC_BLOCK_MAXRECS(mp, level));
- lptr->modulo = p_lptr->num_blocks
- % lptr->num_blocks;
- lptr->num_recs_pb = p_lptr->num_blocks
- / lptr->num_blocks;
- lptr->num_recs_tot = p_lptr->num_blocks;
- }
- }
- ASSERT(lptr->num_blocks == 1);
- btree_curs->num_levels = level;
-
- /*
- * now figure out the number of excess blocks
- */
- for (blocks_needed = 0, i = 0; i < level; i++) {
- blocks_needed += btree_curs->level[i].num_blocks;
- }
- blocks_needed *= 2;
-
- ASSERT(blocks_allocated_total >= blocks_needed);
- extra_blocks = blocks_allocated_total - blocks_needed;
- } else {
- if (extents_used > 0) {
- /*
- * reset the leaf level geometry to account
- * for consumed extents. we can leave the
- * rest of the cursor alone since the number
- * of leaf blocks hasn't changed.
- */
- lptr = &btree_curs->level[0];
-
- lptr->num_recs_pb = num_extents / lptr->num_blocks;
- lptr->modulo = num_extents % lptr->num_blocks;
- lptr->num_recs_tot = num_extents;
+ error = slab_add(lost_fsb, &fsb);
+ if (error)
+ do_error(
+_("Insufficient memory saving lost blocks.\n"));
+ resv->used++;
}
-
- extra_blocks = 0;
}
- btree_curs->num_tot_blocks = blocks_allocated_pt;
- btree_curs->num_free_blocks = blocks_allocated_pt;
-
- *extents = num_extents;
-
- return(extra_blocks);
+ xrep_newbt_destroy(&btr->newbt, 0);
}
/* Map btnum to buffer ops for the types that need it. */
@@ -838,268 +568,202 @@ btnum_to_ops(
}
}
+/*
+ * Free Space Btrees
+ *
+ * We need to leave some free records in the tree for the corner case of
+ * setting up the AGFL. This may require allocation of blocks, and as
+ * such can require insertion of new records into the tree (e.g. moving
+ * a record in the by-count tree when a long extent is shortened). If we
+ * pack the records into the leaves with no slack space, this requires a
+ * leaf split to occur and a block to be allocated from the free list.
+ * If we don't have any blocks on the free list (because we are setting
+ * it up!), then we fail, and the filesystem will fail with the same
+ * failure at runtime. Hence leave a couple of records slack space in
+ * each block to allow immediate modification of the tree without
+ * requiring splits to be done.
+ */
+
static void
-prop_freespace_cursor(xfs_mount_t *mp, xfs_agnumber_t agno,
- bt_status_t *btree_curs, xfs_agblock_t startblock,
- xfs_extlen_t blockcount, int level, xfs_btnum_t btnum)
+init_freespace_cursors(
+ struct repair_ctx *sc,
+ xfs_agnumber_t agno,
+ unsigned int free_space,
+ unsigned int *nr_extents,
+ int *extra_blocks,
+ struct bt_rebuild *btr_bno,
+ struct bt_rebuild *btr_cnt)
{
- struct xfs_btree_block *bt_hdr;
- xfs_alloc_key_t *bt_key;
- xfs_alloc_ptr_t *bt_ptr;
- xfs_agblock_t agbno;
- bt_stat_level_t *lptr;
- const struct xfs_buf_ops *ops = btnum_to_ops(btnum);
+ unsigned int bno_blocks;
+ unsigned int cnt_blocks;
int error;
- ASSERT(btnum == XFS_BTNUM_BNO || btnum == XFS_BTNUM_CNT);
+ init_rebuild(sc, &XFS_RMAP_OINFO_AG, free_space, btr_bno);
+ init_rebuild(sc, &XFS_RMAP_OINFO_AG, free_space, btr_cnt);
- level++;
-
- if (level >= btree_curs->num_levels)
- return;
-
- lptr = &btree_curs->level[level];
- bt_hdr = XFS_BUF_TO_BLOCK(lptr->buf_p);
-
- if (be16_to_cpu(bt_hdr->bb_numrecs) == 0) {
- /*
- * only happens once when initializing the
- * left-hand side of the tree.
- */
- prop_freespace_cursor(mp, agno, btree_curs, startblock,
- blockcount, level, btnum);
- }
+ btr_bno->cur = libxfs_allocbt_stage_cursor(sc->mp,
+ &btr_bno->newbt.afake, agno, XFS_BTNUM_BNO);
+ btr_cnt->cur = libxfs_allocbt_stage_cursor(sc->mp,
+ &btr_cnt->newbt.afake, agno, XFS_BTNUM_CNT);
- if (be16_to_cpu(bt_hdr->bb_numrecs) ==
- lptr->num_recs_pb + (lptr->modulo > 0)) {
- /*
- * write out current prev block, grab us a new block,
- * and set the rightsib pointer of current block
- */
-#ifdef XR_BLD_FREE_TRACE
- fprintf(stderr, " %d ", lptr->prev_agbno);
-#endif
- if (lptr->prev_agbno != NULLAGBLOCK) {
- ASSERT(lptr->prev_buf_p != NULL);
- libxfs_buf_mark_dirty(lptr->prev_buf_p);
- libxfs_buf_relse(lptr->prev_buf_p);
- }
- lptr->prev_agbno = lptr->agbno;;
- lptr->prev_buf_p = lptr->buf_p;
- agbno = get_next_blockaddr(agno, level, btree_curs);
+ /*
+ * Now we need to allocate blocks for the free space btrees using the
+ * free space records we're about to put in them. Every record we use
+ * can change the shape of the free space trees, so we recompute the
+ * btree shape until we stop needing /more/ blocks. If we have any
+ * left over we'll stash them in the AGFL when we're done.
+ */
+ do {
+ unsigned int num_freeblocks;
- bt_hdr->bb_u.s.bb_rightsib = cpu_to_be32(agbno);
+ bno_blocks = btr_bno->bload.nr_blocks;
+ cnt_blocks = btr_cnt->bload.nr_blocks;
- error = -libxfs_buf_get(mp->m_dev,
- XFS_AGB_TO_DADDR(mp, agno, agbno),
- XFS_FSB_TO_BB(mp, 1), &lptr->buf_p);
+ /* Compute how many bnobt blocks we'll need. */
+ error = -libxfs_btree_bload_compute_geometry(btr_bno->cur,
+ &btr_bno->bload, *nr_extents);
if (error)
do_error(
- _("Cannot grab free space btree buffer, err=%d"),
- error);
- lptr->agbno = agbno;
+_("Unable to compute free space by block btree geometry, error %d.\n"), -error);
- if (lptr->modulo)
- lptr->modulo--;
-
- /*
- * initialize block header
- */
- lptr->buf_p->b_ops = ops;
- bt_hdr = XFS_BUF_TO_BLOCK(lptr->buf_p);
- memset(bt_hdr, 0, mp->m_sb.sb_blocksize);
- libxfs_btree_init_block(mp, lptr->buf_p, btnum, level,
- 0, agno);
+ /* Compute how many cntbt blocks we'll need. */
+ error = -libxfs_btree_bload_compute_geometry(btr_bno->cur,
+ &btr_cnt->bload, *nr_extents);
+ if (error)
+ do_error(
+_("Unable to compute free space by length btree geometry, error %d.\n"), -error);
- bt_hdr->bb_u.s.bb_leftsib = cpu_to_be32(lptr->prev_agbno);
+ /* We don't need any more blocks, so we're done. */
+ if (bno_blocks >= btr_bno->bload.nr_blocks &&
+ cnt_blocks >= btr_cnt->bload.nr_blocks)
+ break;
- /*
- * propagate extent record for first extent in new block up
- */
- prop_freespace_cursor(mp, agno, btree_curs, startblock,
- blockcount, level, btnum);
- }
- /*
- * add extent info to current block
- */
- be16_add_cpu(&bt_hdr->bb_numrecs, 1);
+ /* Allocate however many more blocks we need this time. */
+ if (bno_blocks < btr_bno->bload.nr_blocks)
+ setup_rebuild(sc->mp, agno, btr_bno,
+ btr_bno->bload.nr_blocks - bno_blocks);
+ if (cnt_blocks < btr_cnt->bload.nr_blocks)
+ setup_rebuild(sc->mp, agno, btr_cnt,
+ btr_cnt->bload.nr_blocks - cnt_blocks);
- bt_key = XFS_ALLOC_KEY_ADDR(mp, bt_hdr,
- be16_to_cpu(bt_hdr->bb_numrecs));
- bt_ptr = XFS_ALLOC_PTR_ADDR(mp, bt_hdr,
- be16_to_cpu(bt_hdr->bb_numrecs),
- mp->m_alloc_mxr[1]);
+ /* Ok, now how many free space records do we have? */
+ *nr_extents = count_bno_extents_blocks(agno, &num_freeblocks);
+ } while (1);
- bt_key->ar_startblock = cpu_to_be32(startblock);
- bt_key->ar_blockcount = cpu_to_be32(blockcount);
- *bt_ptr = cpu_to_be32(btree_curs->level[level-1].agbno);
+ *extra_blocks = (bno_blocks - btr_bno->bload.nr_blocks) +
+ (cnt_blocks - btr_cnt->bload.nr_blocks);
}
-/*
- * rebuilds a freespace tree given a cursor and type
- * of tree to build (bno or bcnt). returns the number of free blocks
- * represented by the tree.
- */
-static xfs_extlen_t
-build_freespace_tree(xfs_mount_t *mp, xfs_agnumber_t agno,
- bt_status_t *btree_curs, xfs_btnum_t btnum)
+static void
+get_freesp_data(
+ struct xfs_btree_cur *cur,
+ struct extent_tree_node *bno_rec,
+ xfs_agblock_t *freeblks)
{
- xfs_agnumber_t i;
- xfs_agblock_t j;
- struct xfs_btree_block *bt_hdr;
- xfs_alloc_rec_t *bt_rec;
- int level;
- xfs_agblock_t agbno;
- extent_tree_node_t *ext_ptr;
- bt_stat_level_t *lptr;
- xfs_extlen_t freeblks;
- const struct xfs_buf_ops *ops = btnum_to_ops(btnum);
- int error;
+ struct xfs_alloc_rec_incore *arec = &cur->bc_rec.a;
- ASSERT(btnum == XFS_BTNUM_BNO || btnum == XFS_BTNUM_CNT);
-
-#ifdef XR_BLD_FREE_TRACE
- fprintf(stderr, "in build_freespace_tree, agno = %d\n", agno);
-#endif
- level = btree_curs->num_levels;
- freeblks = 0;
+ arec->ar_startblock = bno_rec->ex_startblock;
+ arec->ar_blockcount = bno_rec->ex_blockcount;
+ if (freeblks)
+ *freeblks += bno_rec->ex_blockcount;
+}
- ASSERT(level > 0);
+/* Grab one bnobt record. */
+static int
+get_bnobt_record(
+ struct xfs_btree_cur *cur,
+ void *priv)
+{
+ struct bt_rebuild *btr = priv;
- /*
- * initialize the first block on each btree level
- */
- for (i = 0; i < level; i++) {
- lptr = &btree_curs->level[i];
+ get_freesp_data(cur, btr->bno_rec, btr->freeblks);
+ btr->bno_rec = findnext_bno_extent(btr->bno_rec);
+ return 0;
+}
- agbno = get_next_blockaddr(agno, i, btree_curs);
- error = -libxfs_buf_get(mp->m_dev,
- XFS_AGB_TO_DADDR(mp, agno, agbno),
- XFS_FSB_TO_BB(mp, 1), &lptr->buf_p);
- if (error)
- do_error(
- _("Cannot grab free space btree buffer, err=%d"),
- error);
+/* Rebuild a free space by block number btree. */
+static void
+build_bnobt(
+ struct repair_ctx *sc,
+ xfs_agnumber_t agno,
+ struct bt_rebuild *btr_bno,
+ xfs_agblock_t *freeblks)
+{
+ int error;
- if (i == btree_curs->num_levels - 1)
- btree_curs->root = agbno;
+ *freeblks = 0;
+ btr_bno->bload.get_record = get_bnobt_record;
+ btr_bno->bload.claim_block = rebuild_claim_block;
+ btr_bno->bno_rec = findfirst_bno_extent(agno);
+ btr_bno->freeblks = freeblks;
- lptr->agbno = agbno;
- lptr->prev_agbno = NULLAGBLOCK;
- lptr->prev_buf_p = NULL;
- /*
- * initialize block header
- */
- lptr->buf_p->b_ops = ops;
- bt_hdr = XFS_BUF_TO_BLOCK(lptr->buf_p);
- memset(bt_hdr, 0, mp->m_sb.sb_blocksize);
- libxfs_btree_init_block(mp, lptr->buf_p, btnum, i, 0, agno);
- }
- /*
- * run along leaf, setting up records. as we have to switch
- * blocks, call the prop_freespace_cursor routine to set up the new
- * pointers for the parent. that can recurse up to the root
- * if required. set the sibling pointers for leaf level here.
- */
- if (btnum == XFS_BTNUM_BNO)
- ext_ptr = findfirst_bno_extent(agno);
- else
- ext_ptr = findfirst_bcnt_extent(agno);
+ error = -libxfs_trans_alloc_empty(sc->mp, &sc->tp);
+ if (error)
+ do_error(
+_("Insufficient memory to construct bnobt rebuild transaction.\n"));
-#ifdef XR_BLD_FREE_TRACE
- fprintf(stderr, "bft, agno = %d, start = %u, count = %u\n",
- agno, ext_ptr->ex_startblock, ext_ptr->ex_blockcount);
-#endif
+ /* Add all observed bnobt records. */
+ error = -libxfs_btree_bload(btr_bno->cur, &btr_bno->bload, btr_bno);
+ if (error)
+ do_error(
+_("Error %d while creating bnobt btree for AG %u.\n"), error, agno);
- lptr = &btree_curs->level[0];
+ /* Since we're not writing the AGF yet, no need to commit the cursor */
+ libxfs_btree_del_cursor(btr_bno->cur, 0);
+ error = -libxfs_trans_commit(sc->tp);
+ if (error)
+ do_error(
+_("Error %d while writing bnobt btree for AG %u.\n"), error, agno);
+ sc->tp = NULL;
+}
- for (i = 0; i < btree_curs->level[0].num_blocks; i++) {
- /*
- * block initialization, lay in block header
- */
- lptr->buf_p->b_ops = ops;
- bt_hdr = XFS_BUF_TO_BLOCK(lptr->buf_p);
- memset(bt_hdr, 0, mp->m_sb.sb_blocksize);
- libxfs_btree_init_block(mp, lptr->buf_p, btnum, 0, 0, agno);
+/* Grab one cntbt record. */
+static int
+get_cntbt_record(
+ struct xfs_btree_cur *cur,
+ void *priv)
+{
+ struct bt_rebuild *btr = priv;
- bt_hdr->bb_u.s.bb_leftsib = cpu_to_be32(lptr->prev_agbno);
- bt_hdr->bb_numrecs = cpu_to_be16(lptr->num_recs_pb +
- (lptr->modulo > 0));
-#ifdef XR_BLD_FREE_TRACE
- fprintf(stderr, "bft, bb_numrecs = %d\n",
- be16_to_cpu(bt_hdr->bb_numrecs));
-#endif
+ get_freesp_data(cur, btr->bno_rec, btr->freeblks);
+ btr->bno_rec = findnext_bcnt_extent(cur->bc_ag.agno, btr->bno_rec);
+ return 0;
+}
- if (lptr->modulo > 0)
- lptr->modulo--;
+/* Rebuild a freespace by count btree. */
+static void
+build_cntbt(
+ struct repair_ctx *sc,
+ xfs_agnumber_t agno,
+ struct bt_rebuild *btr_cnt,
+ xfs_agblock_t *freeblks)
+{
+ int error;
- /*
- * initialize values in the path up to the root if
- * this is a multi-level btree
- */
- if (btree_curs->num_levels > 1)
- prop_freespace_cursor(mp, agno, btree_curs,
- ext_ptr->ex_startblock,
- ext_ptr->ex_blockcount,
- 0, btnum);
-
- bt_rec = (xfs_alloc_rec_t *)
- ((char *)bt_hdr + XFS_ALLOC_BLOCK_LEN(mp));
- for (j = 0; j < be16_to_cpu(bt_hdr->bb_numrecs); j++) {
- ASSERT(ext_ptr != NULL);
- bt_rec[j].ar_startblock = cpu_to_be32(
- ext_ptr->ex_startblock);
- bt_rec[j].ar_blockcount = cpu_to_be32(
- ext_ptr->ex_blockcount);
- freeblks += ext_ptr->ex_blockcount;
- if (btnum == XFS_BTNUM_BNO)
- ext_ptr = findnext_bno_extent(ext_ptr);
- else
- ext_ptr = findnext_bcnt_extent(agno, ext_ptr);
-#if 0
-#ifdef XR_BLD_FREE_TRACE
- if (ext_ptr == NULL)
- fprintf(stderr, "null extent pointer, j = %d\n",
- j);
- else
- fprintf(stderr,
- "bft, agno = %d, start = %u, count = %u\n",
- agno, ext_ptr->ex_startblock,
- ext_ptr->ex_blockcount);
-#endif
-#endif
- }
+ *freeblks = 0;
+ btr_cnt->bload.get_record = get_cntbt_record;
+ btr_cnt->bload.claim_block = rebuild_claim_block;
+ btr_cnt->bno_rec = findfirst_bcnt_extent(agno);
+ btr_cnt->freeblks = freeblks;
- if (ext_ptr != NULL) {
- /*
- * get next leaf level block
- */
- if (lptr->prev_buf_p != NULL) {
-#ifdef XR_BLD_FREE_TRACE
- fprintf(stderr, " writing fst agbno %u\n",
- lptr->prev_agbno);
-#endif
- ASSERT(lptr->prev_agbno != NULLAGBLOCK);
- libxfs_buf_mark_dirty(lptr->prev_buf_p);
- libxfs_buf_relse(lptr->prev_buf_p);
- }
- lptr->prev_buf_p = lptr->buf_p;
- lptr->prev_agbno = lptr->agbno;
- lptr->agbno = get_next_blockaddr(agno, 0, btree_curs);
- bt_hdr->bb_u.s.bb_rightsib = cpu_to_be32(lptr->agbno);
+ error = -libxfs_trans_alloc_empty(sc->mp, &sc->tp);
+ if (error)
+ do_error(
+_("Insufficient memory to construct cntbt rebuild transaction.\n"));
- error = -libxfs_buf_get(mp->m_dev,
- XFS_AGB_TO_DADDR(mp, agno, lptr->agbno),
- XFS_FSB_TO_BB(mp, 1),
- &lptr->buf_p);
- if (error)
- do_error(
- _("Cannot grab free space btree buffer, err=%d"),
- error);
- }
- }
+ /* Add all observed cntbt records. */
+ error = -libxfs_btree_bload(btr_cnt->cur, &btr_cnt->bload, btr_cnt);
+ if (error)
+ do_error(
+_("Error %d while creating cntbt btree for AG %u.\n"), error, agno);
- return(freeblks);
+ /* Since we're not writing the AGF yet, no need to commit the cursor */
+ libxfs_btree_del_cursor(btr_cnt->cur, 0);
+ error = -libxfs_trans_commit(sc->tp);
+ if (error)
+ do_error(
+_("Error %d while writing cntbt btree for AG %u.\n"), error, agno);
+ sc->tp = NULL;
}
/*
@@ -2233,6 +1897,27 @@ _("Insufficient memory to construct refcount cursor."));
free_slab_cursor(&refc_cur);
}
+/* Fill the AGFL with any leftover bnobt rebuilder blocks. */
+static void
+fill_agfl(
+ struct bt_rebuild *btr,
+ __be32 *agfl_bnos,
+ int *i)
+{
+ struct xrep_newbt_resv *resv, *n;
+ struct xfs_mount *mp = btr->newbt.sc->mp;
+
+ for_each_xrep_newbt_reservation(&btr->newbt, resv, n) {
+ xfs_agblock_t bno;
+
+ bno = XFS_FSB_TO_AGBNO(mp, resv->fsbno + resv->used);
+ while (resv->used < resv->len && (*i) < libxfs_agfl_size(mp)) {
+ agfl_bnos[(*i)++] = cpu_to_be32(bno++);
+ resv->used++;
+ }
+ }
+}
+
/*
* build both the agf and the agfl for an agno given both
* btree cursors.
@@ -2243,8 +1928,8 @@ static void
build_agf_agfl(
struct xfs_mount *mp,
xfs_agnumber_t agno,
- struct bt_status *bno_bt,
- struct bt_status *bcnt_bt,
+ struct bt_rebuild *btr_bno,
+ struct bt_rebuild *btr_cnt,
xfs_extlen_t freeblks, /* # free blocks in tree */
int lostblocks, /* # blocks that will be lost */
struct bt_status *rmap_bt,
@@ -2256,7 +1941,6 @@ build_agf_agfl(
int i;
struct xfs_agfl *agfl;
struct xfs_agf *agf;
- xfs_fsblock_t fsb;
__be32 *freelist;
int error;
@@ -2288,10 +1972,14 @@ build_agf_agfl(
agf->agf_length = cpu_to_be32(mp->m_sb.sb_dblocks -
(xfs_rfsblock_t) mp->m_sb.sb_agblocks * agno);
- agf->agf_roots[XFS_BTNUM_BNO] = cpu_to_be32(bno_bt->root);
- agf->agf_levels[XFS_BTNUM_BNO] = cpu_to_be32(bno_bt->num_levels);
- agf->agf_roots[XFS_BTNUM_CNT] = cpu_to_be32(bcnt_bt->root);
- agf->agf_levels[XFS_BTNUM_CNT] = cpu_to_be32(bcnt_bt->num_levels);
+ agf->agf_roots[XFS_BTNUM_BNO] =
+ cpu_to_be32(btr_bno->newbt.afake.af_root);
+ agf->agf_levels[XFS_BTNUM_BNO] =
+ cpu_to_be32(btr_bno->newbt.afake.af_levels);
+ agf->agf_roots[XFS_BTNUM_CNT] =
+ cpu_to_be32(btr_cnt->newbt.afake.af_root);
+ agf->agf_levels[XFS_BTNUM_CNT] =
+ cpu_to_be32(btr_cnt->newbt.afake.af_levels);
agf->agf_roots[XFS_BTNUM_RMAP] = cpu_to_be32(rmap_bt->root);
agf->agf_levels[XFS_BTNUM_RMAP] = cpu_to_be32(rmap_bt->num_levels);
agf->agf_freeblks = cpu_to_be32(freeblks);
@@ -2311,9 +1999,8 @@ build_agf_agfl(
* Don't count the root blocks as they are already
* accounted for.
*/
- blks = (bno_bt->num_tot_blocks - bno_bt->num_free_blocks) +
- (bcnt_bt->num_tot_blocks - bcnt_bt->num_free_blocks) -
- 2;
+ blks = btr_bno->newbt.afake.af_blocks +
+ btr_cnt->newbt.afake.af_blocks - 2;
if (xfs_sb_version_hasrmapbt(&mp->m_sb))
blks += rmap_bt->num_tot_blocks - rmap_bt->num_free_blocks - 1;
agf->agf_btreeblks = cpu_to_be32(blks);
@@ -2357,49 +2044,14 @@ build_agf_agfl(
}
freelist = xfs_buf_to_agfl_bno(agfl_buf);
+ i = 0;
- /*
- * do we have left-over blocks in the btree cursors that should
- * be used to fill the AGFL?
- */
- if (bno_bt->num_free_blocks > 0 || bcnt_bt->num_free_blocks > 0) {
- /*
- * yes, now grab as many blocks as we can
- */
- i = 0;
- while (bno_bt->num_free_blocks > 0 && i < libxfs_agfl_size(mp))
- {
- freelist[i] = cpu_to_be32(
- get_next_blockaddr(agno, 0, bno_bt));
- i++;
- }
-
- while (bcnt_bt->num_free_blocks > 0 && i < libxfs_agfl_size(mp))
- {
- freelist[i] = cpu_to_be32(
- get_next_blockaddr(agno, 0, bcnt_bt));
- i++;
- }
- /*
- * now throw the rest of the blocks away and complain
- */
- while (bno_bt->num_free_blocks > 0) {
- fsb = XFS_AGB_TO_FSB(mp, agno,
- get_next_blockaddr(agno, 0, bno_bt));
- error = slab_add(lost_fsb, &fsb);
- if (error)
- do_error(
-_("Insufficient memory saving lost blocks.\n"));
- }
- while (bcnt_bt->num_free_blocks > 0) {
- fsb = XFS_AGB_TO_FSB(mp, agno,
- get_next_blockaddr(agno, 0, bcnt_bt));
- error = slab_add(lost_fsb, &fsb);
- if (error)
- do_error(
-_("Insufficient memory saving lost blocks.\n"));
- }
+ /* Fill the AGFL with leftover blocks or save them for later. */
+ fill_agfl(btr_bno, freelist, &i);
+ fill_agfl(btr_cnt, freelist, &i);
+ /* Set the AGF counters for the AGFL. */
+ if (i > 0) {
agf->agf_flfirst = 0;
agf->agf_fllast = cpu_to_be32(i - 1);
agf->agf_flcount = cpu_to_be32(i);
@@ -2497,8 +2149,8 @@ phase5_func(
uint64_t num_free_inos;
uint64_t finobt_num_inos;
uint64_t finobt_num_free_inos;
- bt_status_t bno_btree_curs;
- bt_status_t bcnt_btree_curs;
+ struct bt_rebuild btr_bno;
+ struct bt_rebuild btr_cnt;
bt_status_t ino_btree_curs;
bt_status_t fino_btree_curs;
bt_status_t rmap_btree_curs;
@@ -2506,9 +2158,7 @@ phase5_func(
int extra_blocks = 0;
uint num_freeblocks;
xfs_extlen_t freeblks1;
-#ifdef DEBUG
xfs_extlen_t freeblks2;
-#endif
xfs_agblock_t num_extents;
if (verbose)
@@ -2517,7 +2167,7 @@ phase5_func(
/*
* build up incore bno and bcnt extent btrees
*/
- num_extents = mk_incore_fstree(mp, agno);
+ num_extents = mk_incore_fstree(mp, agno, &num_freeblocks);
#ifdef XR_BLD_FREE_TRACE
fprintf(stderr, "# of bno extents is %d\n",
@@ -2596,8 +2246,8 @@ phase5_func(
/*
* track blocks that we might really lose
*/
- extra_blocks = calculate_freespace_cursor(mp, agno,
- &num_extents, &bno_btree_curs);
+ init_freespace_cursors(&sc, agno, num_freeblocks, &num_extents,
+ &extra_blocks, &btr_bno, &btr_cnt);
/*
* freespace btrees live in the "free space" but
@@ -2615,13 +2265,6 @@ phase5_func(
if (extra_blocks > 0)
sb_fdblocks_ag[agno] -= extra_blocks;
- bcnt_btree_curs = bno_btree_curs;
-
- bno_btree_curs.owner = XFS_RMAP_OWN_AG;
- bcnt_btree_curs.owner = XFS_RMAP_OWN_AG;
- setup_cursor(mp, agno, &bno_btree_curs);
- setup_cursor(mp, agno, &bcnt_btree_curs);
-
#ifdef XR_BLD_FREE_TRACE
fprintf(stderr, "# of bno extents is %d\n",
count_bno_extents(agno));
@@ -2629,25 +2272,13 @@ phase5_func(
count_bcnt_extents(agno));
#endif
- /*
- * now rebuild the freespace trees
- */
- freeblks1 = build_freespace_tree(mp, agno,
- &bno_btree_curs, XFS_BTNUM_BNO);
+ /* Rebuild the freespace btrees. */
+ build_bnobt(&sc, agno, &btr_bno, &freeblks1);
+ build_cntbt(&sc, agno, &btr_cnt, &freeblks2);
+
#ifdef XR_BLD_FREE_TRACE
- fprintf(stderr, "# of free blocks == %d\n", freeblks1);
-#endif
- write_cursor(&bno_btree_curs);
-
-#ifdef DEBUG
- freeblks2 = build_freespace_tree(mp, agno,
- &bcnt_btree_curs, XFS_BTNUM_CNT);
-#else
- (void) build_freespace_tree(mp, agno,
- &bcnt_btree_curs, XFS_BTNUM_CNT);
+ fprintf(stderr, "# of free blocks == %d/%d\n", freeblks1, freeblks2);
#endif
- write_cursor(&bcnt_btree_curs);
-
ASSERT(freeblks1 == freeblks2);
if (xfs_sb_version_hasrmapbt(&mp->m_sb)) {
@@ -2665,9 +2296,9 @@ phase5_func(
/*
* set up agf and agfl
*/
- build_agf_agfl(mp, agno, &bno_btree_curs,
- &bcnt_btree_curs, freeblks1, extra_blocks,
+ build_agf_agfl(mp, agno, &btr_bno, &btr_cnt, freeblks1, extra_blocks,
&rmap_btree_curs, &refcnt_btree_curs, lost_fsb);
+
/*
* build inode allocation tree.
*/
@@ -2691,15 +2322,14 @@ phase5_func(
/*
* tear down cursors
*/
- finish_cursor(&bno_btree_curs);
- finish_cursor(&ino_btree_curs);
+ finish_rebuild(mp, &btr_bno, lost_fsb);
+ finish_rebuild(mp, &btr_cnt, lost_fsb);
if (xfs_sb_version_hasrmapbt(&mp->m_sb))
finish_cursor(&rmap_btree_curs);
if (xfs_sb_version_hasreflink(&mp->m_sb))
finish_cursor(&refcnt_btree_curs);
if (xfs_sb_version_hasfinobt(&mp->m_sb))
finish_cursor(&fino_btree_curs);
- finish_cursor(&bcnt_btree_curs);
/*
* release the incore per-AG bno/bcnt trees so
