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-rw-r--r--fs/bcachefs/alloc_foreground.c2
-rw-r--r--fs/bcachefs/backpointers.c106
-rw-r--r--fs/bcachefs/backpointers.h37
-rw-r--r--fs/bcachefs/buckets.c2
-rw-r--r--fs/bcachefs/ec.c5
-rw-r--r--fs/bcachefs/move.c2
6 files changed, 102 insertions, 52 deletions
diff --git a/fs/bcachefs/alloc_foreground.c b/fs/bcachefs/alloc_foreground.c
index f54d90868314..cc182b263066 100644
--- a/fs/bcachefs/alloc_foreground.c
+++ b/fs/bcachefs/alloc_foreground.c
@@ -342,7 +342,7 @@ static struct open_bucket *try_alloc_bucket(struct btree_trans *trans, struct bc
struct bch_backpointer bp;
struct bpos bp_pos = POS_MIN;
- ret = bch2_get_next_backpointer(trans, POS(ca->dev_idx, b), -1,
+ ret = bch2_get_next_backpointer(trans, ca, POS(ca->dev_idx, b), -1,
&bp_pos, &bp,
BTREE_ITER_nopreserve);
if (ret) {
diff --git a/fs/bcachefs/backpointers.c b/fs/bcachefs/backpointers.c
index 282aee70a51f..3f5333b4c3de 100644
--- a/fs/bcachefs/backpointers.c
+++ b/fs/bcachefs/backpointers.c
@@ -23,6 +23,7 @@ static bool extent_matches_bp(struct bch_fs *c,
const union bch_extent_entry *entry;
struct extent_ptr_decoded p;
+ rcu_read_lock();
bkey_for_each_ptr_decode(k.k, ptrs, p, entry) {
struct bpos bucket2;
struct bch_backpointer bp2;
@@ -30,13 +31,18 @@ static bool extent_matches_bp(struct bch_fs *c,
if (p.ptr.cached)
continue;
- struct bch_dev *ca = bch2_dev_bkey_exists(c, p.ptr.dev);
+ struct bch_dev *ca = bch2_dev_rcu(c, p.ptr.dev);
+ if (!ca)
+ continue;
bch2_extent_ptr_to_bp(c, ca, btree_id, level, k, p, entry, &bucket2, &bp2);
if (bpos_eq(bucket, bucket2) &&
- !memcmp(&bp, &bp2, sizeof(bp)))
+ !memcmp(&bp, &bp2, sizeof(bp))) {
+ rcu_read_unlock();
return true;
+ }
}
+ rcu_read_unlock();
return false;
}
@@ -47,16 +53,21 @@ int bch2_backpointer_invalid(struct bch_fs *c, struct bkey_s_c k,
{
struct bkey_s_c_backpointer bp = bkey_s_c_to_backpointer(k);
- /* these will be caught by fsck */
- if (!bch2_dev_exists(c, bp.k->p.inode))
+ rcu_read_lock();
+ struct bch_dev *ca = bch2_dev_rcu(c, bp.k->p.inode);
+ if (!ca) {
+ /* these will be caught by fsck */
+ rcu_read_unlock();
return 0;
+ }
- struct bch_dev *ca = bch2_dev_bkey_exists(c, bp.k->p.inode);
- struct bpos bucket = bp_pos_to_bucket(c, bp.k->p);
+ struct bpos bucket = bp_pos_to_bucket(ca, bp.k->p);
+ struct bpos bp_pos = bucket_pos_to_bp_noerror(ca, bucket, bp.v->bucket_offset);
+ rcu_read_unlock();
int ret = 0;
bkey_fsck_err_on((bp.v->bucket_offset >> MAX_EXTENT_COMPRESS_RATIO_SHIFT) >= ca->mi.bucket_size ||
- !bpos_eq(bp.k->p, bucket_pos_to_bp_noerror(ca, bucket, bp.v->bucket_offset)),
+ !bpos_eq(bp.k->p, bp_pos),
c, err,
backpointer_bucket_offset_wrong,
"backpointer bucket_offset wrong");
@@ -77,10 +88,16 @@ void bch2_backpointer_to_text(struct printbuf *out, const struct bch_backpointer
void bch2_backpointer_k_to_text(struct printbuf *out, struct bch_fs *c, struct bkey_s_c k)
{
- if (bch2_dev_exists(c, k.k->p.inode)) {
+ rcu_read_lock();
+ struct bch_dev *ca = bch2_dev_rcu(c, k.k->p.inode);
+ if (ca) {
+ struct bpos bucket = bp_pos_to_bucket(ca, k.k->p);
+ rcu_read_unlock();
prt_str(out, "bucket=");
- bch2_bpos_to_text(out, bp_pos_to_bucket(c, k.k->p));
+ bch2_bpos_to_text(out, bucket);
prt_str(out, " ");
+ } else {
+ rcu_read_unlock();
}
bch2_backpointer_to_text(out, bkey_s_c_to_backpointer(k).v);
@@ -146,6 +163,7 @@ static noinline int backpointer_mod_err(struct btree_trans *trans,
}
int bch2_bucket_backpointer_mod_nowritebuffer(struct btree_trans *trans,
+ struct bch_dev *ca,
struct bpos bucket,
struct bch_backpointer bp,
struct bkey_s_c orig_k,
@@ -162,7 +180,7 @@ int bch2_bucket_backpointer_mod_nowritebuffer(struct btree_trans *trans,
return ret;
bkey_backpointer_init(&bp_k->k_i);
- bp_k->k.p = bucket_pos_to_bp(trans->c, bucket, bp.bucket_offset);
+ bp_k->k.p = bucket_pos_to_bp(ca, bucket, bp.bucket_offset);
bp_k->v = bp;
if (!insert) {
@@ -198,13 +216,13 @@ err:
* Find the next backpointer >= *bp_offset:
*/
int bch2_get_next_backpointer(struct btree_trans *trans,
+ struct bch_dev *ca,
struct bpos bucket, int gen,
struct bpos *bp_pos,
struct bch_backpointer *bp,
unsigned iter_flags)
{
- struct bch_fs *c = trans->c;
- struct bpos bp_end_pos = bucket_pos_to_bp(c, bpos_nosnap_successor(bucket), 0);
+ struct bpos bp_end_pos = bucket_pos_to_bp(ca, bpos_nosnap_successor(bucket), 0);
struct btree_iter alloc_iter = { NULL }, bp_iter = { NULL };
struct bkey_s_c k;
int ret = 0;
@@ -224,7 +242,7 @@ int bch2_get_next_backpointer(struct btree_trans *trans,
goto done;
}
- *bp_pos = bpos_max(*bp_pos, bucket_pos_to_bp(c, bucket, 0));
+ *bp_pos = bpos_max(*bp_pos, bucket_pos_to_bp(ca, bucket, 0));
for_each_btree_key_norestart(trans, bp_iter, BTREE_ID_backpointers,
*bp_pos, iter_flags, k, ret) {
@@ -250,7 +268,6 @@ static void backpointer_not_found(struct btree_trans *trans,
{
struct bch_fs *c = trans->c;
struct printbuf buf = PRINTBUF;
- struct bpos bucket = bp_pos_to_bucket(c, bp_pos);
/*
* If we're using the btree write buffer, the backpointer we were
@@ -260,6 +277,10 @@ static void backpointer_not_found(struct btree_trans *trans,
if (likely(!bch2_backpointers_no_use_write_buffer))
return;
+ struct bpos bucket;
+ if (!bp_pos_to_bucket_nodev(c, bp_pos, &bucket))
+ return;
+
prt_printf(&buf, "backpointer doesn't match %s it points to:\n ",
bp.level ? "btree node" : "extent");
prt_printf(&buf, "bucket: ");
@@ -289,15 +310,17 @@ struct bkey_s_c bch2_backpointer_get_key(struct btree_trans *trans,
{
if (likely(!bp.level)) {
struct bch_fs *c = trans->c;
- struct bpos bucket = bp_pos_to_bucket(c, bp_pos);
- struct bkey_s_c k;
+
+ struct bpos bucket;
+ if (!bp_pos_to_bucket_nodev(c, bp_pos, &bucket))
+ return bkey_s_c_err(-EIO);
bch2_trans_node_iter_init(trans, iter,
bp.btree_id,
bp.pos,
0, 0,
iter_flags);
- k = bch2_btree_iter_peek_slot(iter);
+ struct bkey_s_c k = bch2_btree_iter_peek_slot(iter);
if (bkey_err(k)) {
bch2_trans_iter_exit(trans, iter);
return k;
@@ -326,18 +349,20 @@ struct btree *bch2_backpointer_get_node(struct btree_trans *trans,
struct bch_backpointer bp)
{
struct bch_fs *c = trans->c;
- struct bpos bucket = bp_pos_to_bucket(c, bp_pos);
- struct btree *b;
BUG_ON(!bp.level);
+ struct bpos bucket;
+ if (!bp_pos_to_bucket_nodev(c, bp_pos, &bucket))
+ return ERR_PTR(-EIO);
+
bch2_trans_node_iter_init(trans, iter,
bp.btree_id,
bp.pos,
0,
bp.level - 1,
0);
- b = bch2_btree_iter_peek_node(iter);
+ struct btree *b = bch2_btree_iter_peek_node(iter);
if (IS_ERR_OR_NULL(b))
goto err;
@@ -368,16 +393,16 @@ static int bch2_check_btree_backpointer(struct btree_trans *trans, struct btree_
struct printbuf buf = PRINTBUF;
int ret = 0;
- if (fsck_err_on(!bch2_dev_exists(c, k.k->p.inode), c,
- backpointer_to_missing_device,
- "backpointer for missing device:\n%s",
- (bch2_bkey_val_to_text(&buf, c, k), buf.buf))) {
- ret = bch2_btree_delete_at(trans, bp_iter, 0);
+ struct bpos bucket;
+ if (!bp_pos_to_bucket_nodev_noerror(c, k.k->p, &bucket)) {
+ if (fsck_err(c, backpointer_to_missing_device,
+ "backpointer for missing device:\n%s",
+ (bch2_bkey_val_to_text(&buf, c, k), buf.buf)))
+ ret = bch2_btree_delete_at(trans, bp_iter, 0);
goto out;
}
- alloc_k = bch2_bkey_get_iter(trans, &alloc_iter, BTREE_ID_alloc,
- bp_pos_to_bucket(c, k.k->p), 0);
+ alloc_k = bch2_bkey_get_iter(trans, &alloc_iter, BTREE_ID_alloc, bucket, 0);
ret = bkey_err(alloc_k);
if (ret)
goto out;
@@ -512,25 +537,27 @@ static int check_bp_exists(struct btree_trans *trans,
struct printbuf buf = PRINTBUF;
struct bkey_s_c bp_k;
struct bkey_buf tmp;
- int ret;
+ int ret = 0;
bch2_bkey_buf_init(&tmp);
- if (!bch2_dev_bucket_exists(c, bucket)) {
+ struct bch_dev *ca = bch2_dev_bucket_tryget(c, bucket);
+ if (!ca) {
prt_str(&buf, "extent for nonexistent device:bucket ");
bch2_bpos_to_text(&buf, bucket);
prt_str(&buf, "\n ");
bch2_bkey_val_to_text(&buf, c, orig_k);
bch_err(c, "%s", buf.buf);
- return -BCH_ERR_fsck_repair_unimplemented;
+ ret = -BCH_ERR_fsck_repair_unimplemented;
+ goto err;
}
if (bpos_lt(bucket, s->bucket_start) ||
bpos_gt(bucket, s->bucket_end))
- return 0;
+ goto out;
bp_k = bch2_bkey_get_iter(trans, &bp_iter, BTREE_ID_backpointers,
- bucket_pos_to_bp(c, bucket, bp.bucket_offset),
+ bucket_pos_to_bp(ca, bucket, bp.bucket_offset),
0);
ret = bkey_err(bp_k);
if (ret)
@@ -563,6 +590,7 @@ fsck_err:
bch2_trans_iter_exit(trans, &other_extent_iter);
bch2_trans_iter_exit(trans, &bp_iter);
bch2_bkey_buf_exit(&tmp, c);
+ bch2_dev_put(ca);
printbuf_exit(&buf);
return ret;
check_existing_bp:
@@ -638,13 +666,13 @@ missing:
struct bkey_i_backpointer n_bp_k;
bkey_backpointer_init(&n_bp_k.k_i);
- n_bp_k.k.p = bucket_pos_to_bp(trans->c, bucket, bp.bucket_offset);
+ n_bp_k.k.p = bucket_pos_to_bp(ca, bucket, bp.bucket_offset);
n_bp_k.v = bp;
prt_printf(&buf, "\n want: ");
bch2_bkey_val_to_text(&buf, c, bkey_i_to_s_c(&n_bp_k.k_i));
if (fsck_err(c, ptr_to_missing_backpointer, "%s", buf.buf))
- ret = bch2_bucket_backpointer_mod(trans, bucket, bp, orig_k, true);
+ ret = bch2_bucket_backpointer_mod(trans, ca, bucket, bp, orig_k, true);
goto out;
}
@@ -668,8 +696,14 @@ static int check_extent_to_backpointers(struct btree_trans *trans,
if (p.ptr.cached)
continue;
- struct bch_dev *ca = bch2_dev_bkey_exists(c, p.ptr.dev);
- bch2_extent_ptr_to_bp(c, ca, btree, level, k, p, entry, &bucket_pos, &bp);
+ rcu_read_lock();
+ struct bch_dev *ca = bch2_dev_rcu(c, p.ptr.dev);
+ if (ca)
+ bch2_extent_ptr_to_bp(c, ca, btree, level, k, p, entry, &bucket_pos, &bp);
+ rcu_read_unlock();
+
+ if (!ca)
+ continue;
ret = check_bp_exists(trans, s, bucket_pos, bp, k);
if (ret)
diff --git a/fs/bcachefs/backpointers.h b/fs/bcachefs/backpointers.h
index 1d270c40fce9..929f4a068a0a 100644
--- a/fs/bcachefs/backpointers.h
+++ b/fs/bcachefs/backpointers.h
@@ -6,6 +6,7 @@
#include "btree_iter.h"
#include "btree_update.h"
#include "buckets.h"
+#include "error.h"
#include "super.h"
static inline u64 swab40(u64 x)
@@ -36,15 +37,29 @@ void bch2_backpointer_swab(struct bkey_s);
* Convert from pos in backpointer btree to pos of corresponding bucket in alloc
* btree:
*/
-static inline struct bpos bp_pos_to_bucket(const struct bch_fs *c,
- struct bpos bp_pos)
+static inline struct bpos bp_pos_to_bucket(const struct bch_dev *ca, struct bpos bp_pos)
{
- struct bch_dev *ca = bch2_dev_bkey_exists(c, bp_pos.inode);
u64 bucket_sector = bp_pos.offset >> MAX_EXTENT_COMPRESS_RATIO_SHIFT;
return POS(bp_pos.inode, sector_to_bucket(ca, bucket_sector));
}
+static inline bool bp_pos_to_bucket_nodev_noerror(struct bch_fs *c, struct bpos bp_pos, struct bpos *bucket)
+{
+ rcu_read_lock();
+ struct bch_dev *ca = bch2_dev_rcu(c, bp_pos.inode);
+ if (ca)
+ *bucket = bp_pos_to_bucket(ca, bp_pos);
+ rcu_read_unlock();
+ return ca != NULL;
+}
+
+static inline bool bp_pos_to_bucket_nodev(struct bch_fs *c, struct bpos bp_pos, struct bpos *bucket)
+{
+ return !bch2_fs_inconsistent_on(!bp_pos_to_bucket_nodev_noerror(c, bp_pos, bucket),
+ c, "backpointer for missing device %llu", bp_pos.inode);
+}
+
static inline struct bpos bucket_pos_to_bp_noerror(const struct bch_dev *ca,
struct bpos bucket,
u64 bucket_offset)
@@ -57,32 +72,32 @@ static inline struct bpos bucket_pos_to_bp_noerror(const struct bch_dev *ca,
/*
* Convert from pos in alloc btree + bucket offset to pos in backpointer btree:
*/
-static inline struct bpos bucket_pos_to_bp(const struct bch_fs *c,
+static inline struct bpos bucket_pos_to_bp(const struct bch_dev *ca,
struct bpos bucket,
u64 bucket_offset)
{
- struct bch_dev *ca = bch2_dev_bkey_exists(c, bucket.inode);
struct bpos ret = bucket_pos_to_bp_noerror(ca, bucket, bucket_offset);
- EBUG_ON(!bkey_eq(bucket, bp_pos_to_bucket(c, ret)));
+ EBUG_ON(!bkey_eq(bucket, bp_pos_to_bucket(ca, ret)));
return ret;
}
-int bch2_bucket_backpointer_mod_nowritebuffer(struct btree_trans *, struct bpos bucket,
- struct bch_backpointer, struct bkey_s_c, bool);
+int bch2_bucket_backpointer_mod_nowritebuffer(struct btree_trans *, struct bch_dev *,
+ struct bpos bucket, struct bch_backpointer, struct bkey_s_c, bool);
static inline int bch2_bucket_backpointer_mod(struct btree_trans *trans,
+ struct bch_dev *ca,
struct bpos bucket,
struct bch_backpointer bp,
struct bkey_s_c orig_k,
bool insert)
{
if (unlikely(bch2_backpointers_no_use_write_buffer))
- return bch2_bucket_backpointer_mod_nowritebuffer(trans, bucket, bp, orig_k, insert);
+ return bch2_bucket_backpointer_mod_nowritebuffer(trans, ca, bucket, bp, orig_k, insert);
struct bkey_i_backpointer bp_k;
bkey_backpointer_init(&bp_k.k_i);
- bp_k.k.p = bucket_pos_to_bp(trans->c, bucket, bp.bucket_offset);
+ bp_k.k.p = bucket_pos_to_bp(ca, bucket, bp.bucket_offset);
bp_k.v = bp;
if (!insert) {
@@ -142,7 +157,7 @@ static inline void bch2_extent_ptr_to_bp(struct bch_fs *c, struct bch_dev *ca,
};
}
-int bch2_get_next_backpointer(struct btree_trans *, struct bpos, int,
+int bch2_get_next_backpointer(struct btree_trans *, struct bch_dev *ca, struct bpos, int,
struct bpos *, struct bch_backpointer *, unsigned);
struct bkey_s_c bch2_backpointer_get_key(struct btree_trans *, struct btree_iter *,
struct bpos, struct bch_backpointer,
diff --git a/fs/bcachefs/buckets.c b/fs/bcachefs/buckets.c
index 4774f9c7f060..ae6d6879e2e0 100644
--- a/fs/bcachefs/buckets.c
+++ b/fs/bcachefs/buckets.c
@@ -988,7 +988,7 @@ static int bch2_trigger_pointer(struct btree_trans *trans,
goto err;
if (!p.ptr.cached) {
- ret = bch2_bucket_backpointer_mod(trans, bucket, bp, k, insert);
+ ret = bch2_bucket_backpointer_mod(trans, ca, bucket, bp, k, insert);
if (ret)
goto err;
}
diff --git a/fs/bcachefs/ec.c b/fs/bcachefs/ec.c
index f09df7f9036a..6d41530615cb 100644
--- a/fs/bcachefs/ec.c
+++ b/fs/bcachefs/ec.c
@@ -1198,6 +1198,7 @@ err:
}
static int ec_stripe_update_extent(struct btree_trans *trans,
+ struct bch_dev *ca,
struct bpos bucket, u8 gen,
struct ec_stripe_buf *s,
struct bpos *bp_pos)
@@ -1213,7 +1214,7 @@ static int ec_stripe_update_extent(struct btree_trans *trans,
struct bkey_i *n;
int ret, dev, block;
- ret = bch2_get_next_backpointer(trans, bucket, gen,
+ ret = bch2_get_next_backpointer(trans, ca, bucket, gen,
bp_pos, &bp, BTREE_ITER_cached);
if (ret)
return ret;
@@ -1311,7 +1312,7 @@ static int ec_stripe_update_bucket(struct btree_trans *trans, struct ec_stripe_b
ret = commit_do(trans, NULL, NULL,
BCH_TRANS_COMMIT_no_check_rw|
BCH_TRANS_COMMIT_no_enospc,
- ec_stripe_update_extent(trans, bucket_pos, ptr.gen, s, &bp_pos));
+ ec_stripe_update_extent(trans, ca, bucket_pos, ptr.gen, s, &bp_pos));
if (ret)
break;
if (bkey_eq(bp_pos, POS_MAX))
diff --git a/fs/bcachefs/move.c b/fs/bcachefs/move.c
index c441ce7c92ec..0e3203de1cd6 100644
--- a/fs/bcachefs/move.c
+++ b/fs/bcachefs/move.c
@@ -729,7 +729,7 @@ int bch2_evacuate_bucket(struct moving_context *ctxt,
bch2_trans_begin(trans);
- ret = bch2_get_next_backpointer(trans, bucket, gen,
+ ret = bch2_get_next_backpointer(trans, ca, bucket, gen,
&bp_pos, &bp,
BTREE_ITER_cached);
if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
generated by cgit v1.2.3-70-g09d2 (git 2.47.1) at 2024-12-24 02:14:40 +0000