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path: root/fs/btrfs/transaction.c
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Diffstat (limited to 'fs/btrfs/transaction.c')
-rw-r--r--fs/btrfs/transaction.c108
1 files changed, 89 insertions, 19 deletions
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index b72b068183ec..17be3dedacba 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -22,6 +22,7 @@
#include <linux/writeback.h>
#include <linux/pagemap.h>
#include <linux/blkdev.h>
+#include <linux/uuid.h>
#include "ctree.h"
#include "disk-io.h"
#include "transaction.h"
@@ -38,7 +39,6 @@ void put_transaction(struct btrfs_transaction *transaction)
if (atomic_dec_and_test(&transaction->use_count)) {
BUG_ON(!list_empty(&transaction->list));
WARN_ON(transaction->delayed_refs.root.rb_node);
- WARN_ON(!list_empty(&transaction->delayed_refs.seq_head));
memset(transaction, 0, sizeof(*transaction));
kmem_cache_free(btrfs_transaction_cachep, transaction);
}
@@ -100,8 +100,8 @@ loop:
kmem_cache_free(btrfs_transaction_cachep, cur_trans);
cur_trans = fs_info->running_transaction;
goto loop;
- } else if (root->fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) {
- spin_unlock(&root->fs_info->trans_lock);
+ } else if (fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) {
+ spin_unlock(&fs_info->trans_lock);
kmem_cache_free(btrfs_transaction_cachep, cur_trans);
return -EROFS;
}
@@ -126,7 +126,6 @@ loop:
cur_trans->delayed_refs.num_heads = 0;
cur_trans->delayed_refs.flushing = 0;
cur_trans->delayed_refs.run_delayed_start = 0;
- cur_trans->delayed_refs.seq = 1;
/*
* although the tree mod log is per file system and not per transaction,
@@ -145,10 +144,8 @@ loop:
}
atomic_set(&fs_info->tree_mod_seq, 0);
- init_waitqueue_head(&cur_trans->delayed_refs.seq_wait);
spin_lock_init(&cur_trans->commit_lock);
spin_lock_init(&cur_trans->delayed_refs.lock);
- INIT_LIST_HEAD(&cur_trans->delayed_refs.seq_head);
INIT_LIST_HEAD(&cur_trans->pending_snapshots);
list_add_tail(&cur_trans->list, &fs_info->trans_list);
@@ -299,6 +296,7 @@ static struct btrfs_trans_handle *start_transaction(struct btrfs_root *root,
struct btrfs_transaction *cur_trans;
u64 num_bytes = 0;
int ret;
+ u64 qgroup_reserved = 0;
if (root->fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR)
return ERR_PTR(-EROFS);
@@ -317,6 +315,14 @@ static struct btrfs_trans_handle *start_transaction(struct btrfs_root *root,
* the appropriate flushing if need be.
*/
if (num_items > 0 && root != root->fs_info->chunk_root) {
+ if (root->fs_info->quota_enabled &&
+ is_fstree(root->root_key.objectid)) {
+ qgroup_reserved = num_items * root->leafsize;
+ ret = btrfs_qgroup_reserve(root, qgroup_reserved);
+ if (ret)
+ return ERR_PTR(ret);
+ }
+
num_bytes = btrfs_calc_trans_metadata_size(root, num_items);
ret = btrfs_block_rsv_add(root,
&root->fs_info->trans_block_rsv,
@@ -329,6 +335,8 @@ again:
if (!h)
return ERR_PTR(-ENOMEM);
+ sb_start_intwrite(root->fs_info->sb);
+
if (may_wait_transaction(root, type))
wait_current_trans(root);
@@ -339,6 +347,7 @@ again:
} while (ret == -EBUSY);
if (ret < 0) {
+ sb_end_intwrite(root->fs_info->sb);
kmem_cache_free(btrfs_trans_handle_cachep, h);
return ERR_PTR(ret);
}
@@ -349,11 +358,16 @@ again:
h->transaction = cur_trans;
h->blocks_used = 0;
h->bytes_reserved = 0;
+ h->root = root;
h->delayed_ref_updates = 0;
h->use_count = 1;
+ h->adding_csums = 0;
h->block_rsv = NULL;
h->orig_rsv = NULL;
h->aborted = 0;
+ h->qgroup_reserved = qgroup_reserved;
+ h->delayed_ref_elem.seq = 0;
+ INIT_LIST_HEAD(&h->qgroup_ref_list);
smp_mb();
if (cur_trans->blocked && may_wait_transaction(root, type)) {
@@ -473,7 +487,6 @@ int btrfs_should_end_transaction(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
struct btrfs_transaction *cur_trans = trans->transaction;
- struct btrfs_block_rsv *rsv = trans->block_rsv;
int updates;
int err;
@@ -481,12 +494,6 @@ int btrfs_should_end_transaction(struct btrfs_trans_handle *trans,
if (cur_trans->blocked || cur_trans->delayed_refs.flushing)
return 1;
- /*
- * We need to do this in case we're deleting csums so the global block
- * rsv get's used instead of the csum block rsv.
- */
- trans->block_rsv = NULL;
-
updates = trans->delayed_ref_updates;
trans->delayed_ref_updates = 0;
if (updates) {
@@ -495,8 +502,6 @@ int btrfs_should_end_transaction(struct btrfs_trans_handle *trans,
return err;
}
- trans->block_rsv = rsv;
-
return should_end_transaction(trans, root);
}
@@ -513,8 +518,24 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans,
return 0;
}
+ /*
+ * do the qgroup accounting as early as possible
+ */
+ err = btrfs_delayed_refs_qgroup_accounting(trans, info);
+
btrfs_trans_release_metadata(trans, root);
trans->block_rsv = NULL;
+ /*
+ * the same root has to be passed to start_transaction and
+ * end_transaction. Subvolume quota depends on this.
+ */
+ WARN_ON(trans->root != root);
+
+ if (trans->qgroup_reserved) {
+ btrfs_qgroup_free(root, trans->qgroup_reserved);
+ trans->qgroup_reserved = 0;
+ }
+
while (count < 2) {
unsigned long cur = trans->delayed_ref_updates;
trans->delayed_ref_updates = 0;
@@ -527,6 +548,10 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans,
}
count++;
}
+ btrfs_trans_release_metadata(trans, root);
+ trans->block_rsv = NULL;
+
+ sb_end_intwrite(root->fs_info->sb);
if (lock && !atomic_read(&root->fs_info->open_ioctl_trans) &&
should_end_transaction(trans, root)) {
@@ -567,6 +592,7 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans,
root->fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) {
err = -EIO;
}
+ assert_qgroups_uptodate(trans);
memset(trans, 0, sizeof(*trans));
kmem_cache_free(btrfs_trans_handle_cachep, trans);
@@ -785,6 +811,13 @@ static noinline int commit_cowonly_roots(struct btrfs_trans_handle *trans,
ret = btrfs_run_dev_stats(trans, root->fs_info);
BUG_ON(ret);
+ ret = btrfs_run_qgroups(trans, root->fs_info);
+ BUG_ON(ret);
+
+ /* run_qgroups might have added some more refs */
+ ret = btrfs_run_delayed_refs(trans, root, (unsigned long)-1);
+ BUG_ON(ret);
+
while (!list_empty(&fs_info->dirty_cowonly_roots)) {
next = fs_info->dirty_cowonly_roots.next;
list_del_init(next);
@@ -926,11 +959,13 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
struct dentry *dentry;
struct extent_buffer *tmp;
struct extent_buffer *old;
+ struct timespec cur_time = CURRENT_TIME;
int ret;
u64 to_reserve = 0;
u64 index = 0;
u64 objectid;
u64 root_flags;
+ uuid_le new_uuid;
rsv = trans->block_rsv;
@@ -957,6 +992,14 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
}
}
+ ret = btrfs_qgroup_inherit(trans, fs_info, root->root_key.objectid,
+ objectid, pending->inherit);
+ kfree(pending->inherit);
+ if (ret) {
+ pending->error = ret;
+ goto fail;
+ }
+
key.objectid = objectid;
key.offset = (u64)-1;
key.type = BTRFS_ROOT_ITEM_KEY;
@@ -1016,6 +1059,20 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
root_flags &= ~BTRFS_ROOT_SUBVOL_RDONLY;
btrfs_set_root_flags(new_root_item, root_flags);
+ btrfs_set_root_generation_v2(new_root_item,
+ trans->transid);
+ uuid_le_gen(&new_uuid);
+ memcpy(new_root_item->uuid, new_uuid.b, BTRFS_UUID_SIZE);
+ memcpy(new_root_item->parent_uuid, root->root_item.uuid,
+ BTRFS_UUID_SIZE);
+ new_root_item->otime.sec = cpu_to_le64(cur_time.tv_sec);
+ new_root_item->otime.nsec = cpu_to_le64(cur_time.tv_nsec);
+ btrfs_set_root_otransid(new_root_item, trans->transid);
+ memset(&new_root_item->stime, 0, sizeof(new_root_item->stime));
+ memset(&new_root_item->rtime, 0, sizeof(new_root_item->rtime));
+ btrfs_set_root_stransid(new_root_item, 0);
+ btrfs_set_root_rtransid(new_root_item, 0);
+
old = btrfs_lock_root_node(root);
ret = btrfs_cow_block(trans, root, old, NULL, 0, &old);
if (ret) {
@@ -1269,9 +1326,6 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
btrfs_run_ordered_operations(root, 0);
- btrfs_trans_release_metadata(trans, root);
- trans->block_rsv = NULL;
-
if (cur_trans->aborted)
goto cleanup_transaction;
@@ -1282,6 +1336,9 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
if (ret)
goto cleanup_transaction;
+ btrfs_trans_release_metadata(trans, root);
+ trans->block_rsv = NULL;
+
cur_trans = trans->transaction;
/*
@@ -1330,7 +1387,8 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
spin_unlock(&root->fs_info->trans_lock);
}
- if (now < cur_trans->start_time || now - cur_trans->start_time < 1)
+ if (!btrfs_test_opt(root, SSD) &&
+ (now < cur_trans->start_time || now - cur_trans->start_time < 1))
should_grow = 1;
do {
@@ -1352,6 +1410,13 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
goto cleanup_transaction;
/*
+ * running the delayed items may have added new refs. account
+ * them now so that they hinder processing of more delayed refs
+ * as little as possible.
+ */
+ btrfs_delayed_refs_qgroup_accounting(trans, root->fs_info);
+
+ /*
* rename don't use btrfs_join_transaction, so, once we
* set the transaction to blocked above, we aren't going
* to get any new ordered operations. We can safely run
@@ -1463,6 +1528,7 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
root->fs_info->chunk_root->node);
switch_commit_root(root->fs_info->chunk_root);
+ assert_qgroups_uptodate(trans);
update_super_roots(root);
if (!root->fs_info->log_root_recovering) {
@@ -1517,6 +1583,8 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
put_transaction(cur_trans);
put_transaction(cur_trans);
+ sb_end_intwrite(root->fs_info->sb);
+
trace_btrfs_transaction_commit(root);
btrfs_scrub_continue(root);
@@ -1532,6 +1600,8 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
return ret;
cleanup_transaction:
+ btrfs_trans_release_metadata(trans, root);
+ trans->block_rsv = NULL;
btrfs_printk(root->fs_info, "Skipping commit of aborted transaction.\n");
// WARN_ON(1);
if (current->journal_info == trans)
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.