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bcachefs: bch2_dev_get_ioref() checks for device not present

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Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2024-04-30 15:37:51 -04:00
parent 465bf6f42a
commit 2c91ab7262
9 changed files with 23 additions and 37 deletions
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4
fs/bcachefs/alloc_background.c
View file

@ -1679,7 +1679,7 @@ static int bch2_discard_one_bucket(struct btree_trans *trans,
struct bch_dev *ca = s->ca && s->ca->dev_idx == pos.inode
? s->ca
: bch2_dev_get_ioref2(c, pos.inode, WRITE);
: bch2_dev_get_ioref(c, pos.inode, WRITE);
if (!ca) {
bch2_btree_iter_set_pos(need_discard_iter, POS(pos.inode + 1, 0));
return 0;
@ -1860,7 +1860,7 @@ static void bch2_do_discards_fast_work(struct work_struct *work)
if (i->snapshot)
continue;
ca = bch2_dev_get_ioref2(c, i->inode, WRITE);
ca = bch2_dev_get_ioref(c, i->inode, WRITE);
if (!ca) {
darray_remove_item(&c->discard_buckets_in_flight, i);
continue;

2
fs/bcachefs/backpointers.c
View file

@ -486,7 +486,7 @@ static int check_extent_checksum(struct btree_trans *trans,
bytes = p.crc.compressed_size << 9;
struct bch_dev *ca = bch2_dev_get_ioref2(c, dev, READ);
struct bch_dev *ca = bch2_dev_get_ioref(c, dev, READ);
if (!ca)
return false;

6
fs/bcachefs/btree_io.c
View file

@ -1308,7 +1308,7 @@ static void btree_node_read_work(struct work_struct *work)
while (1) {
retry = true;
bch_info(c, "retrying read");
ca = bch2_dev_get_ioref2(c, rb->pick.ptr.dev, READ);
ca = bch2_dev_get_ioref(c, rb->pick.ptr.dev, READ);
rb->have_ioref = ca != NULL;
bio_reset(bio, NULL, REQ_OP_READ|REQ_SYNC|REQ_META);
bio->bi_iter.bi_sector = rb->pick.ptr.offset;
@ -1618,7 +1618,7 @@ static int btree_node_read_all_replicas(struct bch_fs *c, struct btree *b, bool
i = 0;
bkey_for_each_ptr_decode(k.k, ptrs, pick, entry) {
struct bch_dev *ca = bch2_dev_get_ioref2(c, pick.ptr.dev, READ);
struct bch_dev *ca = bch2_dev_get_ioref(c, pick.ptr.dev, READ);
struct btree_read_bio *rb =
container_of(ra->bio[i], struct btree_read_bio, bio);
rb->c = c;
@ -1695,7 +1695,7 @@ void bch2_btree_node_read(struct btree_trans *trans, struct btree *b,
return;
}
ca = bch2_dev_get_ioref2(c, pick.ptr.dev, READ);
ca = bch2_dev_get_ioref(c, pick.ptr.dev, READ);
bio = bio_alloc_bioset(NULL,
buf_pages(b->data, btree_buf_bytes(b)),

4
fs/bcachefs/debug.c
View file

@ -40,7 +40,7 @@ static bool bch2_btree_verify_replica(struct bch_fs *c, struct btree *b,
struct bio *bio;
bool failed = false, saw_error = false;
struct bch_dev *ca = bch2_dev_get_ioref2(c, pick.ptr.dev, READ);
struct bch_dev *ca = bch2_dev_get_ioref(c, pick.ptr.dev, READ);
if (!ca)
return false;
@ -194,7 +194,7 @@ void bch2_btree_node_ondisk_to_text(struct printbuf *out, struct bch_fs *c,
return;
}
ca = bch2_dev_get_ioref2(c, pick.ptr.dev, READ);
ca = bch2_dev_get_ioref(c, pick.ptr.dev, READ);
if (!ca) {
prt_printf(out, "error getting device to read from: not online\n");
return;

21
fs/bcachefs/ec.c
View file

@ -732,12 +732,17 @@ static void ec_block_io(struct bch_fs *c, struct ec_stripe_buf *buf,
struct bch_stripe *v = &bkey_i_to_stripe(&buf->key)->v;
unsigned offset = 0, bytes = buf->size << 9;
struct bch_extent_ptr *ptr = &v->ptrs[idx];
struct bch_dev *ca = bch2_dev_bkey_exists(c, ptr->dev);
enum bch_data_type data_type = idx < v->nr_blocks - v->nr_redundant
? BCH_DATA_user
: BCH_DATA_parity;
int rw = op_is_write(opf);
struct bch_dev *ca = bch2_dev_get_ioref(c, ptr->dev, rw);
if (!ca) {
clear_bit(idx, buf->valid);
return;
}
if (dev_ptr_stale(ca, ptr)) {
bch_err_ratelimited(c,
"error %s stripe: stale pointer",
@ -746,10 +751,6 @@ static void ec_block_io(struct bch_fs *c, struct ec_stripe_buf *buf,
return;
}
if (!bch2_dev_get_ioref(ca, rw)) {
clear_bit(idx, buf->valid);
return;
}
this_cpu_add(ca->io_done->sectors[rw][data_type], buf->size);
@ -1354,20 +1355,18 @@ static void zero_out_rest_of_ec_bucket(struct bch_fs *c,
unsigned block,
struct open_bucket *ob)
{
struct bch_dev *ca = bch2_dev_bkey_exists(c, ob->dev);
unsigned offset = ca->mi.bucket_size - ob->sectors_free;
int ret;
if (!bch2_dev_get_ioref(ca, WRITE)) {
struct bch_dev *ca = bch2_dev_get_ioref(c, ob->dev, WRITE);
if (!ca) {
s->err = -BCH_ERR_erofs_no_writes;
return;
}
unsigned offset = ca->mi.bucket_size - ob->sectors_free;
memset(s->new_stripe.data[block] + (offset << 9),
0,
ob->sectors_free << 9);
ret = blkdev_issue_zeroout(ca->disk_sb.bdev,
int ret = blkdev_issue_zeroout(ca->disk_sb.bdev,
ob->bucket * ca->mi.bucket_size + offset,
ob->sectors_free,
GFP_KERNEL, 0);

2
fs/bcachefs/io_read.c
View file

@ -830,7 +830,7 @@ int __bch2_read_extent(struct btree_trans *trans, struct bch_read_bio *orig,
goto err;
}
struct bch_dev *ca = bch2_dev_get_ioref2(c, pick.ptr.dev, READ);
struct bch_dev *ca = bch2_dev_get_ioref(c, pick.ptr.dev, READ);
/*
* Stale dirty pointers are treated as IO errors, but @failed isn't

4
fs/bcachefs/io_write.c
View file

@ -409,7 +409,7 @@ void bch2_submit_wbio_replicas(struct bch_write_bio *wbio, struct bch_fs *c,
bkey_for_each_ptr(ptrs, ptr) {
struct bch_dev *ca = nocow
? bch2_dev_have_ref(c, ptr->dev)
: bch2_dev_get_ioref2(c, ptr->dev, type == BCH_DATA_btree ? READ : WRITE);
: bch2_dev_get_ioref(c, ptr->dev, type == BCH_DATA_btree ? READ : WRITE);
if (to_entry(ptr + 1) < ptrs.end) {
n = to_wbio(bio_alloc_clone(NULL, &wbio->bio, GFP_NOFS, &c->replica_set));
@ -1265,7 +1265,7 @@ static void bch2_nocow_write(struct bch_write_op *op)
/* Get iorefs before dropping btree locks: */
struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
bkey_for_each_ptr(ptrs, ptr) {
struct bch_dev *ca = bch2_dev_get_ioref2(c, ptr->dev, WRITE);
struct bch_dev *ca = bch2_dev_get_ioref(c, ptr->dev, WRITE);
if (unlikely(!ca))
goto err_get_ioref;

2
fs/bcachefs/journal_io.c
View file

@ -1722,7 +1722,7 @@ static CLOSURE_CALLBACK(journal_write_submit)
unsigned sectors = vstruct_sectors(w->data, c->block_bits);
extent_for_each_ptr(bkey_i_to_s_extent(&w->key), ptr) {
struct bch_dev *ca = bch2_dev_get_ioref2(c, ptr->dev, WRITE);
struct bch_dev *ca = bch2_dev_get_ioref(c, ptr->dev, WRITE);
if (!ca) {
/* XXX: fix this */
bch_err(c, "missing device for journal write\n");

15
fs/bcachefs/sb-members.h
View file

@ -29,19 +29,6 @@ static inline bool bch2_dev_is_readable(struct bch_dev *ca)
ca->mi.state != BCH_MEMBER_STATE_failed;
}
static inline bool bch2_dev_get_ioref(struct bch_dev *ca, int rw)
{
if (!percpu_ref_tryget(&ca->io_ref))
return false;
if (ca->mi.state == BCH_MEMBER_STATE_rw ||
(ca->mi.state == BCH_MEMBER_STATE_ro && rw == READ))
return true;
percpu_ref_put(&ca->io_ref);
return false;
}
static inline unsigned dev_mask_nr(const struct bch_devs_mask *devs)
{
return bitmap_weight(devs->d, BCH_SB_MEMBERS_MAX);
@ -285,7 +272,7 @@ static inline struct bch_dev *bch2_dev_iterate(struct bch_fs *c, struct bch_dev
return bch2_dev_tryget(c, dev_idx);
}
static inline struct bch_dev *bch2_dev_get_ioref2(struct bch_fs *c, unsigned dev, int rw)
static inline struct bch_dev *bch2_dev_get_ioref(struct bch_fs *c, unsigned dev, int rw)
{
rcu_read_lock();
struct bch_dev *ca = bch2_dev_rcu(c, dev);