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Btrfs: leak fixes, pinning fixes 

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2007-03-25 11:35:08 -04:00 committed by David Woodhouse
parent d561c025ee
commit 78fae27ebf
3 changed files with 40 additions and 23 deletions
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30
fs/btrfs/extent-tree.c
View File

@ -165,13 +165,23 @@ static int pin_down_block(struct btrfs_root *root, u64 blocknr, int tag)
{
int err;
struct buffer_head *bh = sb_getblk(root->fs_info->sb, blocknr);
struct btrfs_header *header;
BUG_ON(!bh);
header = btrfs_buffer_header(bh);
if (btrfs_header_generation(header) ==
root->fs_info->running_transaction->transid) {
return 0;
}
err = radix_tree_insert(&root->fs_info->pinned_radix,
blocknr, bh);
if (err && err != -EEXIST) {
BUG();
return err;
}
if (err == -EEXIST)
brelse(bh);
radix_tree_tag_set(&root->fs_info->pinned_radix, blocknr,
tag);
return 0;
@ -181,7 +191,7 @@ static int pin_down_block(struct btrfs_root *root, u64 blocknr, int tag)
* remove an extent from the root, returns 0 on success
*/
static int __free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
*root, u64 blocknr, u64 num_blocks)
*root, u64 blocknr, u64 num_blocks, int pin)
{
struct btrfs_path path;
struct btrfs_key key;
@ -213,12 +223,18 @@ static int __free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
btrfs_set_extent_refs(ei, refs);
if (refs == 0) {
u64 super_blocks_used;
if (pin) {
ret = pin_down_block(root, blocknr,
CTREE_EXTENT_PINNED);
BUG_ON(ret);
}
super_blocks_used = btrfs_super_blocks_used(info->disk_super);
btrfs_set_super_blocks_used(info->disk_super,
super_blocks_used - num_blocks);
ret = btrfs_del_item(trans, extent_root, &path);
if (extent_root->fs_info->last_insert.objectid >
blocknr)
if (extent_root->fs_info->last_insert.objectid > blocknr)
extent_root->fs_info->last_insert.objectid = blocknr;
if (ret)
BUG();
@ -257,7 +273,7 @@ static int del_pending_extents(struct btrfs_trans_handle *trans, struct
radix_tree_tag_clear(radix, gang[i]->b_blocknr,
CTREE_EXTENT_PENDING_DEL);
wret = __free_extent(trans, extent_root,
gang[i]->b_blocknr, 1);
gang[i]->b_blocknr, 1, 0);
if (wret)
err = wret;
}
@ -281,11 +297,7 @@ int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
pin_down_block(root, blocknr, CTREE_EXTENT_PENDING_DEL);
return 0;
}
if (pin) {
ret = pin_down_block(root, blocknr, CTREE_EXTENT_PINNED);
BUG_ON(ret);
}
ret = __free_extent(trans, root, blocknr, num_blocks);
ret = __free_extent(trans, root, blocknr, num_blocks, pin);
pending_ret = del_pending_extents(trans, root->fs_info->extent_root);
return ret ? ret : pending_ret;
}

1
fs/btrfs/super.c
View File

@ -146,6 +146,7 @@ static void btrfs_read_locked_inode(struct inode *inode)
ret = btrfs_lookup_inode(NULL, root, &path, inode->i_ino, 0);
if (ret) {
make_bad_inode(inode);
btrfs_release_path(root, &path);
return;
}
inode_item = btrfs_item_ptr(btrfs_buffer_leaf(path.nodes[0]),

32
fs/btrfs/transaction.c
View File

@ -4,12 +4,15 @@
#include "disk-io.h"
#include "transaction.h"
static int total_trans = 0;
static void put_transaction(struct btrfs_transaction *transaction)
{
transaction->use_count--;
if (transaction->use_count == 0)
if (transaction->use_count == 0) {
WARN_ON(total_trans == 0);
total_trans--;
kfree(transaction);
}
}
static int join_transaction(struct btrfs_root *root)
@ -18,6 +21,7 @@ static int join_transaction(struct btrfs_root *root)
cur_trans = root->fs_info->running_transaction;
if (!cur_trans) {
cur_trans = kmalloc(sizeof(*cur_trans), GFP_NOFS);
total_trans++;
BUG_ON(!cur_trans);
root->fs_info->running_transaction = cur_trans;
cur_trans->num_writers = 0;
@ -108,7 +112,6 @@ static int wait_for_commit(struct btrfs_root *root,
struct btrfs_transaction *commit)
{
DEFINE_WAIT(wait);
commit->use_count++;
while(!commit->commit_done) {
prepare_to_wait(&commit->commit_wait, &wait,
TASK_UNINTERRUPTIBLE);
@ -126,7 +129,7 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
int ret = 0;
struct buffer_head *snap = root->commit_root;
struct buffer_head *snap;
struct btrfs_key snap_key;
struct btrfs_transaction *cur_trans;
DEFINE_WAIT(wait);
@ -153,15 +156,11 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
}
finish_wait(&trans->transaction->writer_wait, &wait);
cur_trans = root->fs_info->running_transaction;
root->fs_info->running_transaction = NULL;
if (root->node != root->commit_root) {
memcpy(&snap_key, &root->root_key, sizeof(snap_key));
root->root_key.offset++;
}
mutex_unlock(&root->fs_info->trans_mutex);
if (btrfs_root_blocknr(&root->root_item) != root->node->b_blocknr) {
btrfs_set_root_blocknr(&root->root_item, root->node->b_blocknr);
@ -173,17 +172,24 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
ret = btrfs_commit_tree_roots(trans, root);
BUG_ON(ret);
cur_trans = root->fs_info->running_transaction;
root->fs_info->running_transaction = NULL;
mutex_unlock(&root->fs_info->trans_mutex);
ret = btrfs_write_and_wait_transaction(trans, root);
BUG_ON(ret);
write_ctree_super(trans, root);
btrfs_finish_extent_commit(trans, root->fs_info->extent_root);
btrfs_finish_extent_commit(trans, root->fs_info->tree_root);
btrfs_finish_extent_commit(trans, root);
mutex_lock(&root->fs_info->trans_mutex);
put_transaction(cur_trans);
put_transaction(cur_trans);
mutex_unlock(&root->fs_info->trans_mutex);
kfree(trans);
if (root->node != root->commit_root) {
trans = btrfs_start_transaction(root, 1);
snap = root->commit_root;
root->commit_root = root->node;
get_bh(root->node);
ret = btrfs_drop_snapshot(trans, root, snap);
@ -191,10 +197,8 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
ret = btrfs_del_root(trans, root->fs_info->tree_root,
&snap_key);
BUG_ON(ret);
root->fs_info->generation = root->root_key.offset + 1;
ret = btrfs_end_transaction(trans, root);
BUG_ON(ret);
BUG_ON(ret); root->fs_info->generation = root->root_key.offset + 1; ret = btrfs_end_transaction(trans, root); BUG_ON(ret);
printk("at free, total trans %d\n", total_trans);
}
return ret;