#include "bcachefs.h"
#include "btree_key_cache.h"
#include "btree_update.h"
+#include "errcode.h"
#include "error.h"
#include "fs.h"
#include "subvolume.h"
}
int bch2_snapshot_invalid(const struct bch_fs *c, struct bkey_s_c k,
- int rw, struct printbuf *err)
+ unsigned flags, struct printbuf *err)
{
struct bkey_s_c_snapshot s;
u32 i, id;
- if (bkey_cmp(k.k->p, POS(0, U32_MAX)) > 0 ||
- bkey_cmp(k.k->p, POS(0, 1)) < 0) {
+ if (bkey_gt(k.k->p, POS(0, U32_MAX)) ||
+ bkey_lt(k.k->p, POS(0, 1))) {
prt_printf(err, "bad pos");
- return -EINVAL;
+ return -BCH_ERR_invalid_bkey;
}
if (bkey_val_bytes(k.k) != sizeof(struct bch_snapshot)) {
prt_printf(err, "bad val size (%zu != %zu)",
bkey_val_bytes(k.k), sizeof(struct bch_snapshot));
- return -EINVAL;
+ return -BCH_ERR_invalid_bkey;
}
s = bkey_s_c_to_snapshot(k);
if (id && id <= k.k->p.offset) {
prt_printf(err, "bad parent node (%u <= %llu)",
id, k.k->p.offset);
- return -EINVAL;
+ return -BCH_ERR_invalid_bkey;
}
if (le32_to_cpu(s.v->children[0]) < le32_to_cpu(s.v->children[1])) {
prt_printf(err, "children not normalized");
- return -EINVAL;
+ return -BCH_ERR_invalid_bkey;
}
if (s.v->children[0] &&
s.v->children[0] == s.v->children[1]) {
prt_printf(err, "duplicate child nodes");
- return -EINVAL;
+ return -BCH_ERR_invalid_bkey;
}
for (i = 0; i < 2; i++) {
if (id >= k.k->p.offset) {
prt_printf(err, "bad child node (%u >= %llu)",
id, k.k->p.offset);
- return -EINVAL;
+ return -BCH_ERR_invalid_bkey;
}
}
for (i = 0; i < 2; i++) {
int ret = snapshot_live(trans, child[i]);
+
if (ret < 0)
return ret;
bch2_trans_init(&trans, c, 0, 0);
- ret = for_each_btree_key_commit(&trans, iter, BTREE_ID_snapshots,
- POS(BCACHEFS_ROOT_INO, 0),
+ ret = for_each_btree_key_commit(&trans, iter,
+ BTREE_ID_snapshots, POS_MIN,
BTREE_ITER_PREFETCH, k,
NULL, NULL, BTREE_INSERT_LAZY_RW|BTREE_INSERT_NOFAIL,
check_snapshot(&trans, &iter, k));
}
static int check_subvol(struct btree_trans *trans,
- struct btree_iter *iter)
+ struct btree_iter *iter,
+ struct bkey_s_c k)
{
- struct bkey_s_c k;
struct bkey_s_c_subvolume subvol;
struct bch_snapshot snapshot;
unsigned snapid;
int ret;
- k = bch2_btree_iter_peek(iter);
- if (!k.k)
- return 0;
-
- ret = bkey_err(k);
- if (ret)
- return ret;
-
if (k.k->type != KEY_TYPE_subvolume)
return 0;
if (BCH_SUBVOLUME_UNLINKED(subvol.v)) {
ret = bch2_subvolume_delete(trans, iter->pos.offset);
- if (ret && ret != -EINTR)
- bch_err(trans->c, "error deleting subvolume %llu: %i",
- iter->pos.offset, ret);
+ if (ret && !bch2_err_matches(ret, BCH_ERR_transaction_restart))
+ bch_err(trans->c, "error deleting subvolume %llu: %s",
+ iter->pos.offset, bch2_err_str(ret));
if (ret)
return ret;
}
{
struct btree_trans trans;
struct btree_iter iter;
+ struct bkey_s_c k;
int ret;
bch2_trans_init(&trans, c, 0, 0);
- bch2_trans_iter_init(&trans, &iter, BTREE_ID_subvolumes,
- POS_MIN, BTREE_ITER_PREFETCH);
-
- do {
- ret = commit_do(&trans, NULL, NULL,
- BTREE_INSERT_LAZY_RW|
- BTREE_INSERT_NOFAIL,
- check_subvol(&trans, &iter));
- if (ret)
- break;
- } while (bch2_btree_iter_advance(&iter));
- bch2_trans_iter_exit(&trans, &iter);
+ ret = for_each_btree_key_commit(&trans, iter,
+ BTREE_ID_subvolumes, POS_MIN, BTREE_ITER_PREFETCH, k,
+ NULL, NULL, BTREE_INSERT_LAZY_RW|BTREE_INSERT_NOFAIL,
+ check_subvol(&trans, &iter, k));
bch2_trans_exit(&trans);
bch2_trans_exit(&trans);
if (ret)
- bch_err(c, "error starting snapshots: %i", ret);
+ bch_err(c, "error starting snapshots: %s", bch2_err_str(ret));
return ret;
}
static int bch2_snapshot_node_set_deleted(struct btree_trans *trans, u32 id)
{
struct btree_iter iter;
- struct bkey_s_c k;
struct bkey_i_snapshot *s;
int ret = 0;
bch2_trans_iter_init(trans, &iter, BTREE_ID_snapshots, POS(0, id),
BTREE_ITER_INTENT);
- k = bch2_btree_iter_peek_slot(&iter);
- ret = bkey_err(k);
- if (ret)
- goto err;
-
- if (k.k->type != KEY_TYPE_snapshot) {
- bch2_fs_inconsistent(trans->c, "missing snapshot %u", id);
- ret = -ENOENT;
+ s = bch2_bkey_get_mut_typed(trans, &iter, snapshot);
+ ret = PTR_ERR_OR_ZERO(s);
+ if (unlikely(ret)) {
+ bch2_fs_inconsistent_on(ret == -ENOENT, trans->c, "missing snapshot %u", id);
goto err;
}
/* already deleted? */
- if (BCH_SNAPSHOT_DELETED(bkey_s_c_to_snapshot(k).v))
- goto err;
-
- s = bch2_trans_kmalloc(trans, sizeof(*s));
- ret = PTR_ERR_OR_ZERO(s);
- if (ret)
+ if (BCH_SNAPSHOT_DELETED(&s->v))
goto err;
- bkey_reassemble(&s->k_i, k);
SET_BCH_SNAPSHOT_DELETED(&s->v, true);
SET_BCH_SNAPSHOT_SUBVOL(&s->v, false);
s->v.subvol = 0;
struct btree_iter iter, p_iter = (struct btree_iter) { NULL };
struct bkey_s_c k;
struct bkey_s_c_snapshot s;
- struct bkey_i_snapshot *parent;
u32 parent_id;
unsigned i;
int ret = 0;
parent_id = le32_to_cpu(s.v->parent);
if (parent_id) {
+ struct bkey_i_snapshot *parent;
+
bch2_trans_iter_init(trans, &p_iter, BTREE_ID_snapshots,
POS(0, parent_id),
BTREE_ITER_INTENT);
- k = bch2_btree_iter_peek_slot(&p_iter);
- ret = bkey_err(k);
- if (ret)
- goto err;
-
- if (k.k->type != KEY_TYPE_snapshot) {
- bch2_fs_inconsistent(trans->c, "missing snapshot %u", parent_id);
- ret = -ENOENT;
- goto err;
- }
-
- parent = bch2_trans_kmalloc(trans, sizeof(*parent));
+ parent = bch2_bkey_get_mut_typed(trans, &p_iter, snapshot);
ret = PTR_ERR_OR_ZERO(parent);
- if (ret)
+ if (unlikely(ret)) {
+ bch2_fs_inconsistent_on(ret == -ENOENT, trans->c, "missing snapshot %u", parent_id);
goto err;
-
- bkey_reassemble(&parent->k_i, k);
+ }
for (i = 0; i < 2; i++)
if (le32_to_cpu(parent->v.children[i]) == id)
goto err;
if (!k.k || !k.k->p.offset) {
- ret = -ENOSPC;
+ ret = -BCH_ERR_ENOSPC_snapshot_create;
goto err;
}
- n = bch2_trans_kmalloc(trans, sizeof(*n));
+ n = bch2_bkey_alloc(trans, &iter, snapshot);
ret = PTR_ERR_OR_ZERO(n);
if (ret)
goto err;
- bkey_snapshot_init(&n->k_i);
- n->k.p = iter.pos;
n->v.flags = 0;
n->v.parent = cpu_to_le32(parent);
n->v.subvol = cpu_to_le32(snapshot_subvols[i]);
if (parent) {
bch2_btree_iter_set_pos(&iter, POS(0, parent));
- k = bch2_btree_iter_peek(&iter);
- ret = bkey_err(k);
- if (ret)
- goto err;
-
- if (k.k->type != KEY_TYPE_snapshot) {
- bch_err(trans->c, "snapshot %u not found", parent);
- ret = -ENOENT;
- goto err;
- }
-
- n = bch2_trans_kmalloc(trans, sizeof(*n));
+ n = bch2_bkey_get_mut_typed(trans, &iter, snapshot);
ret = PTR_ERR_OR_ZERO(n);
- if (ret)
+ if (unlikely(ret)) {
+ if (ret == -ENOENT)
+ bch_err(trans->c, "snapshot %u not found", parent);
goto err;
-
- bkey_reassemble(&n->k_i, k);
+ }
if (n->v.children[0] || n->v.children[1]) {
bch_err(trans->c, "Trying to add child snapshot nodes to parent that already has children");
return ret;
}
-static int bch2_snapshot_delete_keys_btree(struct btree_trans *trans,
- snapshot_id_list *deleted,
- enum btree_id btree_id)
+static int snapshot_delete_key(struct btree_trans *trans,
+ struct btree_iter *iter,
+ struct bkey_s_c k,
+ snapshot_id_list *deleted,
+ snapshot_id_list *equiv_seen,
+ struct bpos *last_pos)
{
struct bch_fs *c = trans->c;
- struct btree_iter iter;
- struct bkey_s_c k;
- snapshot_id_list equiv_seen = { 0 };
- struct bpos last_pos = POS_MIN;
- int ret = 0;
+ u32 equiv = snapshot_t(c, k.k->p.snapshot)->equiv;
- /*
- * XXX: We should also delete whiteouts that no longer overwrite
- * anything
- */
-
- bch2_trans_iter_init(trans, &iter, btree_id, POS_MIN,
- BTREE_ITER_INTENT|
- BTREE_ITER_PREFETCH|
- BTREE_ITER_NOT_EXTENTS|
- BTREE_ITER_ALL_SNAPSHOTS);
-
- while ((bch2_trans_begin(trans),
- (k = bch2_btree_iter_peek(&iter)).k) &&
- !(ret = bkey_err(k))) {
- u32 equiv = snapshot_t(c, k.k->p.snapshot)->equiv;
-
- if (bkey_cmp(k.k->p, last_pos))
- equiv_seen.nr = 0;
- last_pos = k.k->p;
-
- if (snapshot_list_has_id(deleted, k.k->p.snapshot) ||
- snapshot_list_has_id(&equiv_seen, equiv)) {
- ret = commit_do(trans, NULL, NULL,
- BTREE_INSERT_NOFAIL,
- bch2_btree_iter_traverse(&iter) ?:
- bch2_btree_delete_at(trans, &iter,
- BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE));
- if (ret)
- break;
- } else {
- ret = snapshot_list_add(c, &equiv_seen, equiv);
- if (ret)
- break;
- }
+ if (!bkey_eq(k.k->p, *last_pos))
+ equiv_seen->nr = 0;
+ *last_pos = k.k->p;
- bch2_btree_iter_advance(&iter);
+ if (snapshot_list_has_id(deleted, k.k->p.snapshot) ||
+ snapshot_list_has_id(equiv_seen, equiv)) {
+ return bch2_btree_delete_at(trans, iter,
+ BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE);
+ } else {
+ return snapshot_list_add(c, equiv_seen, equiv);
}
- bch2_trans_iter_exit(trans, &iter);
-
- darray_exit(&equiv_seen);
-
- return ret;
}
static int bch2_delete_redundant_snapshot(struct btree_trans *trans, struct btree_iter *iter,
if (!test_bit(BCH_FS_STARTED, &c->flags)) {
ret = bch2_fs_read_write_early(c);
if (ret) {
- bch_err(c, "error deleleting dead snapshots: error going rw: %i", ret);
+ bch_err(c, "error deleleting dead snapshots: error going rw: %s", bch2_err_str(ret));
return ret;
}
}
NULL, NULL, 0,
bch2_delete_redundant_snapshot(&trans, &iter, k));
if (ret) {
- bch_err(c, "error deleting redundant snapshots: %i", ret);
+ bch_err(c, "error deleting redundant snapshots: %s", bch2_err_str(ret));
goto err;
}
POS_MIN, 0, k,
bch2_snapshot_set_equiv(&trans, k));
if (ret) {
- bch_err(c, "error in bch2_snapshots_set_equiv: %i", ret);
+ bch_err(c, "error in bch2_snapshots_set_equiv: %s", bch2_err_str(ret));
goto err;
}
bch2_trans_iter_exit(&trans, &iter);
if (ret) {
- bch_err(c, "error walking snapshots: %i", ret);
+ bch_err(c, "error walking snapshots: %s", bch2_err_str(ret));
goto err;
}
for (id = 0; id < BTREE_ID_NR; id++) {
+ struct bpos last_pos = POS_MIN;
+ snapshot_id_list equiv_seen = { 0 };
+
if (!btree_type_has_snapshots(id))
continue;
- ret = bch2_snapshot_delete_keys_btree(&trans, &deleted, id);
+ ret = for_each_btree_key_commit(&trans, iter,
+ id, POS_MIN,
+ BTREE_ITER_PREFETCH|BTREE_ITER_ALL_SNAPSHOTS, k,
+ NULL, NULL, BTREE_INSERT_NOFAIL,
+ snapshot_delete_key(&trans, &iter, k, &deleted, &equiv_seen, &last_pos));
+
+ darray_exit(&equiv_seen);
+
if (ret) {
- bch_err(c, "error deleting snapshot keys: %i", ret);
+ bch_err(c, "error deleting snapshot keys: %s", bch2_err_str(ret));
goto err;
}
}
ret = commit_do(&trans, NULL, NULL, 0,
bch2_snapshot_node_delete(&trans, deleted.data[i]));
if (ret) {
- bch_err(c, "error deleting snapshot %u: %i",
- deleted.data[i], ret);
+ bch_err(c, "error deleting snapshot %u: %s",
+ deleted.data[i], bch2_err_str(ret));
goto err;
}
}
struct bch_fs *c = container_of(work, struct bch_fs, snapshot_delete_work);
bch2_delete_dead_snapshots(c);
- percpu_ref_put(&c->writes);
+ bch2_write_ref_put(c, BCH_WRITE_REF_delete_dead_snapshots);
}
void bch2_delete_dead_snapshots_async(struct bch_fs *c)
{
- if (!percpu_ref_tryget_live(&c->writes))
- return;
-
- if (!queue_work(system_long_wq, &c->snapshot_delete_work))
- percpu_ref_put(&c->writes);
+ if (bch2_write_ref_tryget(c, BCH_WRITE_REF_delete_dead_snapshots) &&
+ !queue_work(system_long_wq, &c->snapshot_delete_work))
+ bch2_write_ref_put(c, BCH_WRITE_REF_delete_dead_snapshots);
}
static int bch2_delete_dead_snapshots_hook(struct btree_trans *trans,
/* Subvolumes: */
int bch2_subvolume_invalid(const struct bch_fs *c, struct bkey_s_c k,
- int rw, struct printbuf *err)
+ unsigned flags, struct printbuf *err)
{
- if (bkey_cmp(k.k->p, SUBVOL_POS_MIN) < 0 ||
- bkey_cmp(k.k->p, SUBVOL_POS_MAX) > 0) {
+ if (bkey_lt(k.k->p, SUBVOL_POS_MIN) ||
+ bkey_gt(k.k->p, SUBVOL_POS_MAX)) {
prt_printf(err, "invalid pos");
- return -EINVAL;
+ return -BCH_ERR_invalid_bkey;
}
if (bkey_val_bytes(k.k) != sizeof(struct bch_subvolume)) {
prt_printf(err, "incorrect value size (%zu != %zu)",
bkey_val_bytes(k.k), sizeof(struct bch_subvolume));
- return -EINVAL;
+ return -BCH_ERR_invalid_bkey;
}
return 0;
le32_to_cpu(s.v->snapshot));
}
-int bch2_subvolume_get(struct btree_trans *trans, unsigned subvol,
- bool inconsistent_if_not_found,
- int iter_flags,
- struct bch_subvolume *s)
+static __always_inline int
+bch2_subvolume_get_inlined(struct btree_trans *trans, unsigned subvol,
+ bool inconsistent_if_not_found,
+ int iter_flags,
+ struct bch_subvolume *s)
{
struct btree_iter iter;
struct bkey_s_c k;
return ret;
}
+int bch2_subvolume_get(struct btree_trans *trans, unsigned subvol,
+ bool inconsistent_if_not_found,
+ int iter_flags,
+ struct bch_subvolume *s)
+{
+ return bch2_subvolume_get_inlined(trans, subvol, inconsistent_if_not_found, iter_flags, s);
+}
+
int bch2_snapshot_get_subvol(struct btree_trans *trans, u32 snapshot,
struct bch_subvolume *subvol)
{
struct bch_subvolume s;
int ret;
- ret = bch2_subvolume_get(trans, subvol, true,
- BTREE_ITER_CACHED|
- BTREE_ITER_WITH_UPDATES,
- &s);
-
- *snapid = le32_to_cpu(s.snapshot);
+ ret = bch2_subvolume_get_inlined(trans, subvol, true,
+ BTREE_ITER_CACHED|
+ BTREE_ITER_WITH_UPDATES,
+ &s);
+ if (!ret)
+ *snapid = le32_to_cpu(s.snapshot);
return ret;
}
goto err;
ret = bch2_snapshot_node_set_deleted(trans, snapid);
+ if (ret)
+ goto err;
h = bch2_trans_kmalloc(trans, sizeof(*h));
ret = PTR_ERR_OR_ZERO(h);
ret = bch2_trans_do(c, NULL, NULL, BTREE_INSERT_NOFAIL,
bch2_subvolume_delete(&trans, *id));
if (ret) {
- bch_err(c, "error %i deleting subvolume %u", ret, *id);
+ bch_err(c, "error deleting subvolume %u: %s", *id, bch2_err_str(ret));
break;
}
}
darray_exit(&s);
}
- percpu_ref_put(&c->writes);
+ bch2_write_ref_put(c, BCH_WRITE_REF_snapshot_delete_pagecache);
}
struct subvolume_unlink_hook {
if (ret)
return ret;
- if (unlikely(!percpu_ref_tryget_live(&c->writes)))
+ if (!bch2_write_ref_tryget(c, BCH_WRITE_REF_snapshot_delete_pagecache))
return -EROFS;
if (!queue_work(system_long_wq, &c->snapshot_wait_for_pagecache_and_delete_work))
- percpu_ref_put(&c->writes);
+ bch2_write_ref_put(c, BCH_WRITE_REF_snapshot_delete_pagecache);
return 0;
}
int bch2_subvolume_unlink(struct btree_trans *trans, u32 subvolid)
{
struct btree_iter iter;
- struct bkey_s_c k;
struct bkey_i_subvolume *n;
struct subvolume_unlink_hook *h;
int ret = 0;
POS(0, subvolid),
BTREE_ITER_CACHED|
BTREE_ITER_INTENT);
- k = bch2_btree_iter_peek_slot(&iter);
- ret = bkey_err(k);
- if (ret)
- goto err;
-
- if (k.k->type != KEY_TYPE_subvolume) {
- bch2_fs_inconsistent(trans->c, "missing subvolume %u", subvolid);
- ret = -EIO;
- goto err;
- }
-
- n = bch2_trans_kmalloc(trans, sizeof(*n));
+ n = bch2_bkey_get_mut_typed(trans, &iter, subvolume);
ret = PTR_ERR_OR_ZERO(n);
- if (ret)
+ if (unlikely(ret)) {
+ bch2_fs_inconsistent_on(ret == -ENOENT, trans->c, "missing subvolume %u", subvolid);
goto err;
+ }
- bkey_reassemble(&n->k_i, k);
SET_BCH_SUBVOLUME_UNLINKED(&n->v, true);
ret = bch2_trans_update(trans, &iter, &n->k_i, 0);
for_each_btree_key(trans, dst_iter, BTREE_ID_subvolumes, SUBVOL_POS_MIN,
BTREE_ITER_SLOTS|BTREE_ITER_INTENT, k, ret) {
- if (bkey_cmp(k.k->p, SUBVOL_POS_MAX) > 0)
+ if (bkey_gt(k.k->p, SUBVOL_POS_MAX))
break;
/*
}
if (!ret)
- ret = -ENOSPC;
+ ret = -BCH_ERR_ENOSPC_subvolume_create;
goto err;
found_slot:
snapshot_subvols[0] = dst_iter.pos.offset;
if (src_subvolid) {
/* Creating a snapshot: */
- src_subvol = bch2_trans_kmalloc(trans, sizeof(*src_subvol));
- ret = PTR_ERR_OR_ZERO(src_subvol);
- if (ret)
- goto err;
bch2_trans_iter_init(trans, &src_iter, BTREE_ID_subvolumes,
POS(0, src_subvolid),
BTREE_ITER_CACHED|
BTREE_ITER_INTENT);
- k = bch2_btree_iter_peek_slot(&src_iter);
- ret = bkey_err(k);
- if (ret)
- goto err;
-
- if (k.k->type != KEY_TYPE_subvolume) {
- bch_err(c, "subvolume %u not found", src_subvolid);
- ret = -ENOENT;
+ src_subvol = bch2_bkey_get_mut_typed(trans, &src_iter, subvolume);
+ ret = PTR_ERR_OR_ZERO(src_subvol);
+ if (unlikely(ret)) {
+ bch2_fs_inconsistent_on(ret == -ENOENT, trans->c,
+ "subvolume %u not found", src_subvolid);
goto err;
}
- bkey_reassemble(&src_subvol->k_i, k);
parent = le32_to_cpu(src_subvol->v.snapshot);
}
goto err;
}
- new_subvol = bch2_trans_kmalloc(trans, sizeof(*new_subvol));
+ new_subvol = bch2_bkey_alloc(trans, &dst_iter, subvolume);
ret = PTR_ERR_OR_ZERO(new_subvol);
if (ret)
goto err;
- bkey_subvolume_init(&new_subvol->k_i);
new_subvol->v.flags = 0;
new_subvol->v.snapshot = cpu_to_le32(new_nodes[0]);
new_subvol->v.inode = cpu_to_le64(inode);
SET_BCH_SUBVOLUME_RO(&new_subvol->v, ro);
SET_BCH_SUBVOLUME_SNAP(&new_subvol->v, src_subvolid != 0);
- new_subvol->k.p = dst_iter.pos;
ret = bch2_trans_update(trans, &dst_iter, &new_subvol->k_i, 0);
if (ret)
goto err;
projects / bcachefs-tools-debian / blobdiff