diff options
| author | Josef Bacik <josef@redhat.com> | 2009-11-11 05:23:48 +0300 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2009-11-11 22:20:16 +0300 |
| commit | 249ac1e55c642c670f47aacdc57629bbbf10a8db (patch) | |
| tree | b03fdf12ee409fb2b5d696f2644ac67a7a690778 | |
| parent | 6346c93988caa3048bf4d81f9ba3608a7a195aa2 (diff) | |
| download | linux-249ac1e55c642c670f47aacdc57629bbbf10a8db.tar.xz | |
Btrfs: cleanup transaction starting and fix journal_info usage
We use journal_info to tell if we're in a nested transaction to make sure we
don't commit the transaction within a nested transaction. We use another
method to see if there are any outstanding ioctl trans handles, so if we're
starting one do not set current->journal_info, since it will screw with other
filesystems. This patch also cleans up the starting stuff so there aren't any
magic numbers.
Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
| -rw-r--r-- | fs/btrfs/transaction.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index bca82a4ca8e6..c207e8c32c9b 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -163,8 +163,14 @@ static void wait_current_trans(struct btrfs_root *root) } } +enum btrfs_trans_type { + TRANS_START, + TRANS_JOIN, + TRANS_USERSPACE, +}; + static struct btrfs_trans_handle *start_transaction(struct btrfs_root *root, - int num_blocks, int wait) + int num_blocks, int type) { struct btrfs_trans_handle *h = kmem_cache_alloc(btrfs_trans_handle_cachep, GFP_NOFS); @@ -172,7 +178,8 @@ static struct btrfs_trans_handle *start_transaction(struct btrfs_root *root, mutex_lock(&root->fs_info->trans_mutex); if (!root->fs_info->log_root_recovering && - ((wait == 1 && !root->fs_info->open_ioctl_trans) || wait == 2)) + ((type == TRANS_START && !root->fs_info->open_ioctl_trans) || + type == TRANS_USERSPACE)) wait_current_trans(root); ret = join_transaction(root); BUG_ON(ret); @@ -186,7 +193,7 @@ static struct btrfs_trans_handle *start_transaction(struct btrfs_root *root, h->alloc_exclude_start = 0; h->delayed_ref_updates = 0; - if (!current->journal_info) + if (!current->journal_info && type != TRANS_USERSPACE) current->journal_info = h; root->fs_info->running_transaction->use_count++; @@ -198,18 +205,18 @@ static struct btrfs_trans_handle *start_transaction(struct btrfs_root *root, struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root, int num_blocks) { - return start_transaction(root, num_blocks, 1); + return start_transaction(root, num_blocks, TRANS_START); } struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root, int num_blocks) { - return start_transaction(root, num_blocks, 0); + return start_transaction(root, num_blocks, TRANS_JOIN); } struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *r, int num_blocks) { - return start_transaction(r, num_blocks, 2); + return start_transaction(r, num_blocks, TRANS_USERSPACE); } /* wait for a transaction commit to be fully complete */ |