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Btrfs: Add mount -o nodatasum to turn of file data checksumming

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Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2007-12-14 15:30:32 -05:00
parent e9906a9849
commit b6cda9bcb4
4 changed files with 34 additions and 9 deletions
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14
fs/btrfs/ctree.h
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@@ -321,6 +321,7 @@ struct btrfs_fs_info {
u64 generation;
u64 last_trans_committed;
unsigned long mount_opt;
struct btrfs_transaction *running_transaction;
struct btrfs_super_block super_copy;
struct extent_buffer *sb_buffer;
@@ -429,6 +430,13 @@ struct btrfs_root {
*/
#define BTRFS_STRING_ITEM_KEY 253
#define BTRFS_MOUNT_NODATASUM 0x1
#define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
#define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
#define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
BTRFS_MOUNT_##opt)
/* some macros to generate set/get funcs for the struct fields. This
* assumes there is a lefoo_to_cpu for every type, so lets make a simple
* one for u8:
@@ -906,12 +914,6 @@ static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
((unsigned long)(btrfs_leaf_data(leaf) + \
btrfs_item_offset_nr(leaf, slot)))
/* mount option defines and helpers */
#define BTRFS_MOUNT_SUBVOL 0x000001
#define btrfs_clear_opt(o, opt) o &= ~BTRFS_MOUNT_##opt
#define btrfs_set_opt(o, opt) o |= BTRFS_MOUNT_##opt
#define btrfs_test_opt(sb, opt) (BTRFS_SB(sb)->s_mount_opt & \
BTRFS_MOUNT_##opt)
/* extent-tree.c */
int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
struct btrfs_root *root);