Hello,
This patch adds NODATASUM & NODATACOW inode flags support.
Regards
YZ
----
diff -r 0cb34a2c27ae btrfs_inode.h
--- a/btrfs_inode.h Fri Jan 04 09:34:54 2008 -0500
+++ b/btrfs_inode.h Mon Jan 07 17:58:14 2008 +0800
@@ -33,6 +33,7 @@ struct btrfs_inode {
* transid of the trans_handle that last modified this inode
*/
u64 last_trans;
+ u32 flags;
};
static inline struct btrfs_inode *BTRFS_I(struct inode *inode)
{
diff -r 0cb34a2c27ae ctree.h
--- a/ctree.h Fri Jan 04 09:34:54 2008 -0500
+++ b/ctree.h Mon Jan 07 17:58:14 2008 +0800
@@ -447,6 +447,18 @@ struct btrfs_root {
#define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
#define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
BTRFS_MOUNT_##opt)
+/*
+ * Inode flags
+ */
+#define BTRFS_INODE_NODATASUM 0x1
+#define BTRFS_INODE_NODATACOW 0x2
+
+#define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
+ ~BTRFS_INODE_##flag)
+#define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
+ BTRFS_INODE_##flag)
+#define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
+ BTRFS_INODE_##flag)
/* 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
diff -r 0cb34a2c27ae inode.c
--- a/inode.c Fri Jan 04 09:34:54 2008 -0500
+++ b/inode.c Mon Jan 07 17:58:14 2008 +0800
@@ -233,7 +233,8 @@ static int run_delalloc_range(struct ino
int ret;
mutex_lock(&root->fs_info->fs_mutex);
- if (btrfs_test_opt(root, NODATACOW))
+ if (btrfs_test_opt(root, NODATACOW) ||
+ btrfs_test_flag(inode, NODATACOW))
ret = run_delalloc_nocow(inode, start, end);
else
ret = cow_file_range(inode, start, end);
@@ -262,7 +263,8 @@ int btrfs_writepage_io_hook(struct page
u64 page_start = (u64)page->index << PAGE_CACHE_SHIFT;
size_t offset = start - page_start;
- if (btrfs_test_opt(root, NODATASUM))
+ if (btrfs_test_opt(root, NODATASUM) ||
+ btrfs_test_flag(inode, NODATASUM))
return 0;
mutex_lock(&root->fs_info->fs_mutex);
@@ -288,7 +290,8 @@ int btrfs_readpage_io_hook(struct page *
struct btrfs_path *path = NULL;
u32 csum;
- if (btrfs_test_opt(root, NODATASUM))
+ if (btrfs_test_opt(root, NODATASUM) ||
+ btrfs_test_flag(inode, NODATASUM))
return 0;
mutex_lock(&root->fs_info->fs_mutex);
@@ -324,7 +327,8 @@ int btrfs_readpage_end_io_hook(struct pa
u32 csum = ~(u32)0;
unsigned long flags;
- if (btrfs_test_opt(root, NODATASUM))
+ if (btrfs_test_opt(root, NODATASUM) ||
+ btrfs_test_flag(inode, NODATASUM))
return 0;
ret = get_state_private(em_tree, start, &private);
@@ -403,6 +407,7 @@ void btrfs_read_locked_inode(struct inod
alloc_group_block = btrfs_inode_block_group(leaf, inode_item);
BTRFS_I(inode)->block_group = btrfs_lookup_block_group(root->fs_info,
alloc_group_block);
+ BTRFS_I(inode)->flags = btrfs_inode_flags(leaf, inode_item);
if (!BTRFS_I(inode)->block_group) {
BTRFS_I(inode)->block_group = btrfs_find_block_group(root,
@@ -472,6 +477,7 @@ static void fill_inode_item(struct exten
btrfs_set_inode_nblocks(leaf, item, inode->i_blocks);
btrfs_set_inode_generation(leaf, item, inode->i_generation);
btrfs_set_inode_rdev(leaf, item, inode->i_rdev);
+ btrfs_set_inode_flags(leaf, item, BTRFS_I(inode)->flags);
btrfs_set_inode_block_group(leaf, item,
BTRFS_I(inode)->block_group->key.objectid);
}
@@ -1428,6 +1434,7 @@ static struct inode *btrfs_new_inode(str
owner = 1;
group = btrfs_find_block_group(root, group, 0, 0, owner);
BTRFS_I(inode)->block_group = group;
+ BTRFS_I(inode)->flags = 0;
ret = btrfs_insert_empty_inode(trans, root, path, objectid);
if (ret)
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