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| author | Chris Mason | 2007-12-18 02:14:04 +0100 |
|---|---|---|
| committer | Chris Mason | 2008-09-25 17:03:58 +0200 |
| commit | c59f8951d48c5eb000926935f3ab063d8181d1ee (patch) | |
| tree | ddf1e3ecb8a03fc30add98ee263c23eb6d382621 /fs/btrfs/inode.c | |
| parent | Btrfs: Fix extent_map and extent_state leaks by flushing lrus on FS unmount (diff) | |
| download | kernel-qcow2-linux-c59f8951d48c5eb000926935f3ab063d8181d1ee.tar.gz kernel-qcow2-linux-c59f8951d48c5eb000926935f3ab063d8181d1ee.tar.xz kernel-qcow2-linux-c59f8951d48c5eb000926935f3ab063d8181d1ee.zip | |
Btrfs: Add mount option to enforce a max extent size
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/inode.c')
| -rw-r--r-- | fs/btrfs/inode.c | 28 |
1 files changed, 18 insertions, 10 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 91f3fc43e2a9..686dd03f34f2 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -78,6 +78,7 @@ static int cow_file_range(struct inode *inode, u64 start, u64 end) struct btrfs_trans_handle *trans; u64 alloc_hint = 0; u64 num_bytes; + u64 cur_alloc_size; u64 blocksize = root->sectorsize; struct btrfs_key ins; int ret; @@ -94,17 +95,24 @@ static int cow_file_range(struct inode *inode, u64 start, u64 end) if (alloc_hint == EXTENT_MAP_INLINE) goto out; - ret = btrfs_alloc_extent(trans, root, num_bytes, - root->root_key.objectid, trans->transid, - inode->i_ino, start, 0, - alloc_hint, (u64)-1, &ins, 1); - if (ret) { - WARN_ON(1); - goto out; + while(num_bytes > 0) { + cur_alloc_size = min(num_bytes, root->fs_info->max_extent); + ret = btrfs_alloc_extent(trans, root, cur_alloc_size, + root->root_key.objectid, + trans->transid, + inode->i_ino, start, 0, + alloc_hint, (u64)-1, &ins, 1); + if (ret) { + WARN_ON(1); + goto out; + } + ret = btrfs_insert_file_extent(trans, root, inode->i_ino, + start, ins.objectid, ins.offset, + ins.offset); + num_bytes -= cur_alloc_size; + alloc_hint = ins.objectid + ins.offset; + start += cur_alloc_size; } - ret = btrfs_insert_file_extent(trans, root, inode->i_ino, - start, ins.objectid, ins.offset, - ins.offset); out: btrfs_end_transaction(trans, root); return ret; |