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| author | Chris Mason <chris.mason@oracle.com> | 2007-12-14 15:30:32 -0500 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2008-09-25 11:03:58 -0400 |
| commit | b6cda9bcb4df7544c67fc3548a53bc1607d59f46 (patch) | |
| tree | 2bae71b1c9eca52bf1e37ca1b3bdd4525e0a43fd /fs/btrfs/inode.c | |
| parent | e9906a98497c26a3c1a7532b51b81cc1fbdf9e1d (diff) | |
| download | talos-obmc-linux-b6cda9bcb4df7544c67fc3548a53bc1607d59f46.tar.gz talos-obmc-linux-b6cda9bcb4df7544c67fc3548a53bc1607d59f46.zip | |
Btrfs: Add mount -o nodatasum to turn of file data checksumming
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/inode.c')
| -rw-r--r-- | fs/btrfs/inode.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index e535c50e669b..11885cb114e2 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -116,10 +116,13 @@ int btrfs_writepage_io_hook(struct page *page, u64 start, u64 end) struct btrfs_root *root = BTRFS_I(inode)->root; struct btrfs_trans_handle *trans; char *kaddr; - int ret; + int ret = 0; u64 page_start = (u64)page->index << PAGE_CACHE_SHIFT; size_t offset = start - page_start; + if (btrfs_test_opt(root, NODATASUM)) + return 0; + mutex_lock(&root->fs_info->fs_mutex); trans = btrfs_start_transaction(root, 1); btrfs_set_trans_block_group(trans, inode); @@ -143,6 +146,9 @@ int btrfs_readpage_io_hook(struct page *page, u64 start, u64 end) struct btrfs_path *path = NULL; u32 csum; + if (btrfs_test_opt(root, NODATASUM)) + return 0; + mutex_lock(&root->fs_info->fs_mutex); path = btrfs_alloc_path(); item = btrfs_lookup_csum(NULL, root, path, inode->i_ino, start, 0); @@ -176,6 +182,9 @@ int btrfs_readpage_end_io_hook(struct page *page, u64 start, u64 end) u32 csum = ~(u32)0; unsigned long flags; + if (btrfs_test_opt(root, NODATASUM)) + return 0; + ret = get_state_private(em_tree, start, &private); local_irq_save(flags); kaddr = kmap_atomic(page, KM_IRQ0); |
