aboutsummaryrefslogtreecommitdiffstats
path: root/fs/btrfs/file-item.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/btrfs/file-item.c')
-rw-r--r--fs/btrfs/file-item.c38
1 files changed, 30 insertions, 8 deletions
diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c
index 5d158d32023..94aa53b3872 100644
--- a/fs/btrfs/file-item.c
+++ b/fs/btrfs/file-item.c
@@ -25,11 +25,12 @@
#include "transaction.h"
#include "print-tree.h"
-#define __MAX_CSUM_ITEMS(r, size) ((((BTRFS_LEAF_DATA_SIZE(r) - \
+#define __MAX_CSUM_ITEMS(r, size) ((unsigned long)(((BTRFS_LEAF_DATA_SIZE(r) - \
sizeof(struct btrfs_item) * 2) / \
size) - 1))
-#define MAX_CSUM_ITEMS(r, size) (min(__MAX_CSUM_ITEMS(r, size), PAGE_CACHE_SIZE))
+#define MAX_CSUM_ITEMS(r, size) (min_t(u32, __MAX_CSUM_ITEMS(r, size), \
+ PAGE_CACHE_SIZE))
#define MAX_ORDERED_SUM_BYTES(r) ((PAGE_SIZE - \
sizeof(struct btrfs_ordered_sum)) / \
@@ -132,7 +133,6 @@ fail:
return ERR_PTR(ret);
}
-
int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path, u64 objectid,
@@ -150,6 +150,26 @@ int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
return ret;
}
+u64 btrfs_file_extent_length(struct btrfs_path *path)
+{
+ int extent_type;
+ struct btrfs_file_extent_item *fi;
+ u64 len;
+
+ fi = btrfs_item_ptr(path->nodes[0], path->slots[0],
+ struct btrfs_file_extent_item);
+ extent_type = btrfs_file_extent_type(path->nodes[0], fi);
+
+ if (extent_type == BTRFS_FILE_EXTENT_REG ||
+ extent_type == BTRFS_FILE_EXTENT_PREALLOC)
+ len = btrfs_file_extent_num_bytes(path->nodes[0], fi);
+ else if (extent_type == BTRFS_FILE_EXTENT_INLINE)
+ len = btrfs_file_extent_inline_len(path->nodes[0], fi);
+ else
+ BUG();
+
+ return len;
+}
static int __btrfs_lookup_bio_sums(struct btrfs_root *root,
struct inode *inode, struct bio *bio,
@@ -183,7 +203,7 @@ static int __btrfs_lookup_bio_sums(struct btrfs_root *root,
* read from the commit root and sidestep a nasty deadlock
* between reading the free space cache and updating the csum tree.
*/
- if (btrfs_is_free_space_inode(root, inode)) {
+ if (btrfs_is_free_space_inode(inode)) {
path->search_commit_root = 1;
path->skip_locking = 1;
}
@@ -272,9 +292,9 @@ int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
}
int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
- struct bio *bio, u64 offset, u32 *dst)
+ struct bio *bio, u64 offset)
{
- return __btrfs_lookup_bio_sums(root, inode, bio, offset, dst, 1);
+ return __btrfs_lookup_bio_sums(root, inode, bio, offset, NULL, 1);
}
int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
@@ -440,8 +460,8 @@ int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
if (!contig)
offset = page_offset(bvec->bv_page) + bvec->bv_offset;
- if (!contig && (offset >= ordered->file_offset + ordered->len ||
- offset < ordered->file_offset)) {
+ if (offset >= ordered->file_offset + ordered->len ||
+ offset < ordered->file_offset) {
unsigned long bytes_left;
sums->len = this_sum_bytes;
this_sum_bytes = 0;
@@ -690,6 +710,7 @@ int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
return -ENOMEM;
sector_sum = sums->sums;
+ trans->adding_csums = 1;
again:
next_offset = (u64)-1;
found_next = 0;
@@ -853,6 +874,7 @@ next_sector:
goto again;
}
out:
+ trans->adding_csums = 0;
btrfs_free_path(path);
return ret;