From: Jeff Mahoney <je...@suse.com>
We use BTRFS_LEAF_DATA_SIZE - sizeof(struct btrfs_item) in
several places. This introduces a BTRFS_MAX_ITEM_SIZE macro to do the
same.
Signed-off-by: Jeff Mahoney <je...@suse.com>
---
fs/btrfs/ctree.h | 8 ++++----
fs/btrfs/extent-tree.c | 2 +-
fs/btrfs/file-item.c | 5 ++---
fs/btrfs/volumes.c | 3 +--
4 files changed, 8 insertions(+), 10 deletions(-)
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index bff6ce6..1d3c4b5 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -150,13 +150,13 @@ struct btrfs_header {
sizeof(struct btrfs_key_ptr))
#define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
#define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->nodesize))
+#define BTRFS_MAX_ITEM_SIZE(r) \
+ (BTRFS_LEAF_DATA_SIZE(r) - sizeof(struct btrfs_item))
#define BTRFS_FILE_EXTENT_INLINE_DATA_START \
(offsetof(struct btrfs_file_extent_item, disk_bytenr))
-#define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
- sizeof(struct btrfs_item) - \
+#define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_MAX_ITEM_SIZE(r) - \
BTRFS_FILE_EXTENT_INLINE_DATA_START)
-#define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
- sizeof(struct btrfs_item) -\
+#define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_MAX_ITEM_SIZE(r) - \
sizeof(struct btrfs_dir_item))
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index ee8cd29..e4af375 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -2769,7 +2769,7 @@ u64 btrfs_csum_bytes_to_leaves(struct btrfs_root *root,
u64 csum_bytes)
u64 num_csums_per_leaf;
u64 num_csums;
- csum_size = BTRFS_LEAF_DATA_SIZE(root) - sizeof(struct btrfs_item);
+ csum_size = BTRFS_MAX_ITEM_SIZE(root);
num_csums_per_leaf = div64_u64(csum_size,
(u64)btrfs_super_csum_size(root->fs_info->super_copy));
num_csums = div64_u64(csum_bytes, root->sectorsize);
diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c
index 62a81ee..fc6390e 100644
--- a/fs/btrfs/file-item.c
+++ b/fs/btrfs/file-item.c
@@ -27,9 +27,8 @@
#include "print-tree.h"
#include "compression.h"
-#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) \
+ ((unsigned long)(((BTRFS_MAX_ITEM_SIZE(r) * 2) / size) - 1))
#define MAX_CSUM_ITEMS(r, size) (min_t(u32, __MAX_CSUM_ITEMS(r, size), \
PAGE_SIZE))
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index ca98cac..49c9851 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -4514,8 +4514,7 @@ static void check_raid56_incompat_flag(struct
btrfs_fs_info *info, u64 type)
btrfs_set_fs_incompat(info, RAID56);
}
-#define BTRFS_MAX_DEVS(r) ((BTRFS_LEAF_DATA_SIZE(r) \
- - sizeof(struct btrfs_item) \
+#define BTRFS_MAX_DEVS(r) ((BTRFS_MAX_ITEM_SIZE(r) \
- sizeof(struct btrfs_chunk)) \
/ sizeof(struct btrfs_stripe) + 1)
--
2.7.1
--
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