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-rw-r--r--fs/xfs/scrub/repair.c18
-rw-r--r--fs/xfs/scrub/repair.h2
-rw-r--r--fs/xfs/scrub/rmap_repair.c234
3 files changed, 185 insertions, 69 deletions
diff --git a/fs/xfs/scrub/repair.c b/fs/xfs/scrub/repair.c
index 0c56dafd9ae4..2645abddad78 100644
--- a/fs/xfs/scrub/repair.c
+++ b/fs/xfs/scrub/repair.c
@@ -31,12 +31,14 @@
#include "xfs_error.h"
#include "xfs_reflink.h"
#include "xfs_health.h"
+#include "xfs_buf_mem.h"
#include "scrub/scrub.h"
#include "scrub/common.h"
#include "scrub/trace.h"
#include "scrub/repair.h"
#include "scrub/bitmap.h"
#include "scrub/stats.h"
+#include "scrub/xfile.h"
/*
* Attempt to repair some metadata, if the metadata is corrupt and userspace
@@ -1147,3 +1149,19 @@ xrep_metadata_inode_forks(
return 0;
}
+
+/*
+ * Set up an in-memory buffer cache so that we can use the xfbtree. Allocating
+ * a shmem file might take loks, so we cannot be in transaction context. Park
+ * our resources in the scrub context and let the teardown function take care
+ * of them at the right time.
+ */
+int
+xrep_setup_xfbtree(
+ struct xfs_scrub *sc,
+ const char *descr)
+{
+ ASSERT(sc->tp == NULL);
+
+ return xmbuf_alloc(sc->mp, descr, &sc->xmbtp);
+}
diff --git a/fs/xfs/scrub/repair.h b/fs/xfs/scrub/repair.h
index c01e56799bd1..059b51027365 100644
--- a/fs/xfs/scrub/repair.h
+++ b/fs/xfs/scrub/repair.h
@@ -81,6 +81,8 @@ int xrep_ino_dqattach(struct xfs_scrub *sc);
# define xrep_ino_dqattach(sc) (0)
#endif /* CONFIG_XFS_QUOTA */
+int xrep_setup_xfbtree(struct xfs_scrub *sc, const char *descr);
+
int xrep_ino_ensure_extent_count(struct xfs_scrub *sc, int whichfork,
xfs_extnum_t nextents);
int xrep_reset_perag_resv(struct xfs_scrub *sc);
diff --git a/fs/xfs/scrub/rmap_repair.c b/fs/xfs/scrub/rmap_repair.c
index 120efb49bbfe..6efca28e461d 100644
--- a/fs/xfs/scrub/rmap_repair.c
+++ b/fs/xfs/scrub/rmap_repair.c
@@ -12,6 +12,8 @@
#include "xfs_defer.h"
#include "xfs_btree.h"
#include "xfs_btree_staging.h"
+#include "xfs_buf_mem.h"
+#include "xfs_btree_mem.h"
#include "xfs_bit.h"
#include "xfs_log_format.h"
#include "xfs_trans.h"
@@ -121,33 +123,25 @@
* We use the 'xrep_rmap' prefix for all the rmap functions.
*/
-/*
- * Packed rmap record. The ATTR/BMBT/UNWRITTEN flags are hidden in the upper
- * bits of offset, just like the on-disk record.
- */
-struct xrep_rmap_extent {
- xfs_agblock_t startblock;
- xfs_extlen_t blockcount;
- uint64_t owner;
- uint64_t offset;
-} __packed;
-
/* Context for collecting rmaps */
struct xrep_rmap {
/* new rmapbt information */
struct xrep_newbt new_btree;
/* rmap records generated from primary metadata */
- struct xfarray *rmap_records;
+ struct xfbtree rmap_btree;
struct xfs_scrub *sc;
- /* get_records()'s position in the rmap record array. */
- xfarray_idx_t array_cur;
+ /* in-memory btree cursor for the xfs_btree_bload iteration */
+ struct xfs_btree_cur *mcur;
/* inode scan cursor */
struct xchk_iscan iscan;
+ /* Number of non-freespace records found. */
+ unsigned long long nr_records;
+
/* bnobt/cntbt contribution to btreeblks */
xfs_agblock_t freesp_btblocks;
@@ -161,6 +155,14 @@ xrep_setup_ag_rmapbt(
struct xfs_scrub *sc)
{
struct xrep_rmap *rr;
+ char *descr;
+ int error;
+
+ descr = xchk_xfile_ag_descr(sc, "reverse mapping records");
+ error = xrep_setup_xfbtree(sc, descr);
+ kfree(descr);
+ if (error)
+ return error;
rr = kzalloc(sizeof(struct xrep_rmap), XCHK_GFP_FLAGS);
if (!rr)
@@ -204,11 +206,6 @@ xrep_rmap_stash(
uint64_t offset,
unsigned int flags)
{
- struct xrep_rmap_extent rre = {
- .startblock = startblock,
- .blockcount = blockcount,
- .owner = owner,
- };
struct xfs_rmap_irec rmap = {
.rm_startblock = startblock,
.rm_blockcount = blockcount,
@@ -217,6 +214,7 @@ xrep_rmap_stash(
.rm_flags = flags,
};
struct xfs_scrub *sc = rr->sc;
+ struct xfs_btree_cur *mcur;
int error = 0;
if (xchk_should_terminate(sc, &error))
@@ -224,8 +222,17 @@ xrep_rmap_stash(
trace_xrep_rmap_found(sc->mp, sc->sa.pag->pag_agno, &rmap);
- rre.offset = xfs_rmap_irec_offset_pack(&rmap);
- return xfarray_append(rr->rmap_records, &rre);
+ mcur = xfs_rmapbt_mem_cursor(sc->sa.pag, sc->tp, &rr->rmap_btree);
+ error = xfs_rmap_map_raw(mcur, &rmap);
+ xfs_btree_del_cursor(mcur, error);
+ if (error)
+ goto out_cancel;
+
+ return xfbtree_trans_commit(&rr->rmap_btree, sc->tp);
+
+out_cancel:
+ xfbtree_trans_cancel(&rr->rmap_btree, sc->tp);
+ return error;
}
struct xrep_rmap_stash_run {
@@ -804,6 +811,24 @@ xrep_rmap_find_log_rmaps(
sc->mp->m_sb.sb_logblocks, XFS_RMAP_OWN_LOG, 0, 0);
}
+/* Check and count all the records that we gathered. */
+STATIC int
+xrep_rmap_check_record(
+ struct xfs_btree_cur *cur,
+ const struct xfs_rmap_irec *rec,
+ void *priv)
+{
+ struct xrep_rmap *rr = priv;
+ int error;
+
+ error = xrep_rmap_check_mapping(rr->sc, rec);
+ if (error)
+ return error;
+
+ rr->nr_records++;
+ return 0;
+}
+
/*
* Generate all the reverse-mappings for this AG, a list of the old rmapbt
* blocks, and the new btreeblks count. Figure out if we have enough free
@@ -817,6 +842,7 @@ xrep_rmap_find_rmaps(
struct xfs_scrub *sc = rr->sc;
struct xchk_ag *sa = &sc->sa;
struct xfs_inode *ip;
+ struct xfs_btree_cur *mcur;
int error;
/* Find all the per-AG metadata. */
@@ -884,7 +910,29 @@ end_agscan:
error = xchk_setup_fs(sc);
if (error)
return error;
- return xchk_perag_drain_and_lock(sc);
+ error = xchk_perag_drain_and_lock(sc);
+ if (error)
+ return error;
+
+ /*
+ * Now that we have everything locked again, we need to count the
+ * number of rmap records stashed in the btree. This should reflect
+ * all actively-owned space in the filesystem. At the same time, check
+ * all our records before we start building a new btree, which requires
+ * a bnobt cursor.
+ */
+ mcur = xfs_rmapbt_mem_cursor(rr->sc->sa.pag, NULL, &rr->rmap_btree);
+ sc->sa.bno_cur = xfs_bnobt_init_cursor(sc->mp, sc->tp, sc->sa.agf_bp,
+ sc->sa.pag);
+
+ rr->nr_records = 0;
+ error = xfs_rmap_query_all(mcur, xrep_rmap_check_record, rr);
+
+ xfs_btree_del_cursor(sc->sa.bno_cur, error);
+ sc->sa.bno_cur = NULL;
+ xfs_btree_del_cursor(mcur, error);
+
+ return error;
}
/* Section (II): Reserving space for new rmapbt and setting free space bitmap */
@@ -917,7 +965,6 @@ STATIC int
xrep_rmap_try_reserve(
struct xrep_rmap *rr,
struct xfs_btree_cur *rmap_cur,
- uint64_t nr_records,
struct xagb_bitmap *freesp_blocks,
uint64_t *blocks_reserved,
bool *done)
@@ -1001,7 +1048,7 @@ xrep_rmap_try_reserve(
/* Compute how many blocks we'll need for all the rmaps. */
error = xfs_btree_bload_compute_geometry(rmap_cur,
- &rr->new_btree.bload, nr_records + freesp_records);
+ &rr->new_btree.bload, rr->nr_records + freesp_records);
if (error)
return error;
@@ -1020,16 +1067,13 @@ xrep_rmap_reserve_space(
struct xfs_btree_cur *rmap_cur)
{
struct xagb_bitmap freesp_blocks; /* AGBIT */
- uint64_t nr_records; /* NR */
uint64_t blocks_reserved = 0;
bool done = false;
int error;
- nr_records = xfarray_length(rr->rmap_records);
-
/* Compute how many blocks we'll need for the rmaps collected so far. */
error = xfs_btree_bload_compute_geometry(rmap_cur,
- &rr->new_btree.bload, nr_records);
+ &rr->new_btree.bload, rr->nr_records);
if (error)
return error;
@@ -1046,8 +1090,8 @@ xrep_rmap_reserve_space(
* Finish when we don't need more blocks.
*/
do {
- error = xrep_rmap_try_reserve(rr, rmap_cur, nr_records,
- &freesp_blocks, &blocks_reserved, &done);
+ error = xrep_rmap_try_reserve(rr, rmap_cur, &freesp_blocks,
+ &blocks_reserved, &done);
if (error)
goto out_bitmap;
} while (!done);
@@ -1108,28 +1152,25 @@ xrep_rmap_get_records(
unsigned int nr_wanted,
void *priv)
{
- struct xrep_rmap_extent rec;
- struct xfs_rmap_irec *irec = &cur->bc_rec.r;
struct xrep_rmap *rr = priv;
union xfs_btree_rec *block_rec;
unsigned int loaded;
int error;
for (loaded = 0; loaded < nr_wanted; loaded++, idx++) {
- error = xfarray_load_next(rr->rmap_records, &rr->array_cur,
- &rec);
+ int stat = 0;
+
+ error = xfs_btree_increment(rr->mcur, 0, &stat);
if (error)
return error;
-
- irec->rm_startblock = rec.startblock;
- irec->rm_blockcount = rec.blockcount;
- irec->rm_owner = rec.owner;
- if (xfs_rmap_irec_offset_unpack(rec.offset, irec) != NULL)
+ if (!stat)
return -EFSCORRUPTED;
- error = xrep_rmap_check_mapping(rr->sc, irec);
+ error = xfs_rmap_get_rec(rr->mcur, &cur->bc_rec.r, &stat);
if (error)
return error;
+ if (!stat)
+ return -EFSCORRUPTED;
block_rec = xfs_btree_rec_addr(cur, idx, block);
cur->bc_ops->init_rec_from_cur(cur, block_rec);
@@ -1189,6 +1230,29 @@ xrep_rmap_alloc_vextent(
return xfs_alloc_vextent_near_bno(args, alloc_hint);
}
+
+/* Count the records in this btree. */
+STATIC int
+xrep_rmap_count_records(
+ struct xfs_btree_cur *cur,
+ unsigned long long *nr)
+{
+ int running = 1;
+ int error;
+
+ *nr = 0;
+
+ error = xfs_btree_goto_left_edge(cur);
+ if (error)
+ return error;
+
+ while (running && !(error = xfs_btree_increment(cur, 0, &running))) {
+ if (running)
+ (*nr)++;
+ }
+
+ return error;
+}
/*
* Use the collected rmap information to stage a new rmap btree. If this is
* successful we'll return with the new btree root information logged to the
@@ -1239,6 +1303,17 @@ xrep_rmap_build_new_tree(
goto err_cur;
/*
+ * Count the rmapbt records again, because the space reservation
+ * for the rmapbt itself probably added more records to the btree.
+ */
+ rr->mcur = xfs_rmapbt_mem_cursor(rr->sc->sa.pag, NULL,
+ &rr->rmap_btree);
+
+ error = xrep_rmap_count_records(rr->mcur, &rr->nr_records);
+ if (error)
+ goto err_mcur;
+
+ /*
* Due to btree slack factors, it's possible for a new btree to be one
* level taller than the old btree. Update the incore btree height so
* that we don't trip the verifiers when writing the new btree blocks
@@ -1246,13 +1321,16 @@ xrep_rmap_build_new_tree(
*/
pag->pagf_repair_rmap_level = rr->new_btree.bload.btree_height;
+ /*
+ * Move the cursor to the left edge of the tree so that the first
+ * increment in ->get_records positions us at the first record.
+ */
+ error = xfs_btree_goto_left_edge(rr->mcur);
+ if (error)
+ goto err_level;
+
/* Add all observed rmap records. */
- rr->array_cur = XFARRAY_CURSOR_INIT;
- sc->sa.bno_cur = xfs_bnobt_init_cursor(sc->mp, sc->tp, sc->sa.agf_bp,
- sc->sa.pag);
error = xfs_btree_bload(rmap_cur, &rr->new_btree.bload, rr);
- xfs_btree_del_cursor(sc->sa.bno_cur, error);
- sc->sa.bno_cur = NULL;
if (error)
goto err_level;
@@ -1262,6 +1340,14 @@ xrep_rmap_build_new_tree(
*/
xfs_rmapbt_commit_staged_btree(rmap_cur, sc->tp, sc->sa.agf_bp);
xfs_btree_del_cursor(rmap_cur, 0);
+ xfs_btree_del_cursor(rr->mcur, 0);
+ rr->mcur = NULL;
+
+ /*
+ * Now that we've written the new btree to disk, we don't need to keep
+ * updating the in-memory btree. Abort the scan to stop live updates.
+ */
+ xchk_iscan_abort(&rr->iscan);
/*
* The newly committed rmap recordset includes mappings for the blocks
@@ -1285,6 +1371,8 @@ xrep_rmap_build_new_tree(
err_level:
pag->pagf_repair_rmap_level = 0;
+err_mcur:
+ xfs_btree_del_cursor(rr->mcur, error);
err_cur:
xfs_btree_del_cursor(rmap_cur, error);
err_newbt:
@@ -1312,6 +1400,28 @@ xrep_rmap_find_freesp(
rec->ar_blockcount);
}
+/* Record the free space we find, as part of cleaning out the btree. */
+STATIC int
+xrep_rmap_find_gaps(
+ struct xfs_btree_cur *cur,
+ const struct xfs_rmap_irec *rec,
+ void *priv)
+{
+ struct xrep_rmap_find_gaps *rfg = priv;
+ int error;
+
+ if (rec->rm_startblock > rfg->next_agbno) {
+ error = xagb_bitmap_set(&rfg->rmap_gaps, rfg->next_agbno,
+ rec->rm_startblock - rfg->next_agbno);
+ if (error)
+ return error;
+ }
+
+ rfg->next_agbno = max_t(xfs_agblock_t, rfg->next_agbno,
+ rec->rm_startblock + rec->rm_blockcount);
+ return 0;
+}
+
/*
* Reap the old rmapbt blocks. Now that the rmapbt is fully rebuilt, we make
* a list of gaps in the rmap records and a list of the extents mentioned in
@@ -1328,30 +1438,19 @@ xrep_rmap_remove_old_tree(
struct xfs_scrub *sc = rr->sc;
struct xfs_agf *agf = sc->sa.agf_bp->b_addr;
struct xfs_perag *pag = sc->sa.pag;
+ struct xfs_btree_cur *mcur;
xfs_agblock_t agend;
- xfarray_idx_t array_cur;
int error;
xagb_bitmap_init(&rfg.rmap_gaps);
/* Compute free space from the new rmapbt. */
- foreach_xfarray_idx(rr->rmap_records, array_cur) {
- struct xrep_rmap_extent rec;
-
- error = xfarray_load(rr->rmap_records, array_cur, &rec);
- if (error)
- goto out_bitmap;
+ mcur = xfs_rmapbt_mem_cursor(rr->sc->sa.pag, NULL, &rr->rmap_btree);
- /* Record the free space we find. */
- if (rec.startblock > rfg.next_agbno) {
- error = xagb_bitmap_set(&rfg.rmap_gaps, rfg.next_agbno,
- rec.startblock - rfg.next_agbno);
- if (error)
- goto out_bitmap;
- }
- rfg.next_agbno = max_t(xfs_agblock_t, rfg.next_agbno,
- rec.startblock + rec.blockcount);
- }
+ error = xfs_rmap_query_all(mcur, xrep_rmap_find_gaps, &rfg);
+ xfs_btree_del_cursor(mcur, error);
+ if (error)
+ goto out_bitmap;
/* Insert a record for space between the last rmap and EOAG. */
agend = be32_to_cpu(agf->agf_length);
@@ -1402,14 +1501,11 @@ xrep_rmap_setup_scan(
struct xrep_rmap *rr)
{
struct xfs_scrub *sc = rr->sc;
- char *descr;
int error;
- /* Set up some storage */
- descr = xchk_xfile_ag_descr(sc, "reverse mapping records");
- error = xfarray_create(descr, 0, sizeof(struct xrep_rmap_extent),
- &rr->rmap_records);
- kfree(descr);
+ /* Set up in-memory rmap btree */
+ error = xfs_rmapbt_mem_init(sc->mp, &rr->rmap_btree, sc->xmbtp,
+ sc->sa.pag->pag_agno);
if (error)
return error;
@@ -1424,7 +1520,7 @@ xrep_rmap_teardown(
struct xrep_rmap *rr)
{
xchk_iscan_teardown(&rr->iscan);
- xfarray_destroy(rr->rmap_records);
+ xfbtree_destroy(&rr->rmap_btree);
}
/* Repair the rmap btree for some AG. */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-09 23:13:13 +0000