Btrfs: Count space allocated to file in bytes
This patch makes btrfs count space allocated to file in bytes instead
of 512 byte sectors.
Everything else in btrfs uses a byte count instead of sector sizes or
blocks sizes, so this fits better.
Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 8566eb3..50fbcc9 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -411,7 +411,7 @@
/* transid that last touched this inode */
__le64 transid;
__le64 size;
- __le64 nblocks;
+ __le64 nbytes;
__le64 block_group;
__le32 nlink;
__le32 uid;
@@ -1017,7 +1017,7 @@
BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
-BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64);
+BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
@@ -1814,15 +1814,6 @@
int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
size_t size, struct bio *bio);
-static inline void dec_i_blocks(struct inode *inode, u64 dec)
-{
- dec = dec >> 9;
- if (dec <= inode->i_blocks)
- inode->i_blocks -= dec;
- else
- inode->i_blocks = 0;
-}
-
unsigned long btrfs_force_ra(struct address_space *mapping,
struct file_ra_state *ra, struct file *file,
pgoff_t offset, pgoff_t last_index);
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 2938046..69db54e 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -3930,7 +3930,7 @@
BUG_ON(ret);
btrfs_release_path(root, path);
- inode->i_blocks += extent_len >> 9;
+ inode_add_bytes(inode, extent_len);
ext_offset = 0;
num_bytes -= extent_len;
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index a03d1bb..18dfdf5 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -193,7 +193,7 @@
leaf = path->nodes[0];
ei = btrfs_item_ptr(leaf, path->slots[0],
struct btrfs_file_extent_item);
- inode->i_blocks += (offset + size - found_end) >> 9;
+ inode_add_bytes(inode, offset + size - found_end);
}
if (found_end < offset) {
ptr = btrfs_file_extent_inline_start(ei) + found_size;
@@ -203,7 +203,7 @@
insert:
btrfs_release_path(root, path);
datasize = offset + size - key.offset;
- inode->i_blocks += datasize >> 9;
+ inode_add_bytes(inode, datasize);
datasize = btrfs_file_extent_calc_inline_size(datasize);
ret = btrfs_insert_empty_item(trans, root, path, &key,
datasize);
@@ -713,7 +713,8 @@
extent);
if (btrfs_file_extent_disk_bytenr(leaf,
extent)) {
- dec_i_blocks(inode, old_num - new_num);
+ inode_sub_bytes(inode, old_num -
+ new_num);
}
btrfs_set_file_extent_num_bytes(leaf, extent,
new_num);
@@ -724,14 +725,17 @@
u32 new_size;
new_size = btrfs_file_extent_calc_inline_size(
inline_limit - key.offset);
- dec_i_blocks(inode, (extent_end - key.offset) -
- (inline_limit - key.offset));
+ inode_sub_bytes(inode, extent_end -
+ inline_limit);
btrfs_truncate_item(trans, root, path,
new_size, 1);
}
}
/* delete the entire extent */
if (!keep) {
+ if (found_inline)
+ inode_sub_bytes(inode, extent_end -
+ key.offset);
ret = btrfs_del_item(trans, root, path);
/* TODO update progress marker and return */
BUG_ON(ret);
@@ -743,8 +747,7 @@
u32 new_size;
new_size = btrfs_file_extent_calc_inline_size(
extent_end - end);
- dec_i_blocks(inode, (extent_end - key.offset) -
- (extent_end - end));
+ inode_sub_bytes(inode, end - key.offset);
ret = btrfs_truncate_item(trans, root, path,
new_size, 0);
BUG_ON(ret);
@@ -791,9 +794,7 @@
}
btrfs_release_path(root, path);
if (disk_bytenr != 0) {
- inode->i_blocks +=
- btrfs_file_extent_num_bytes(leaf,
- extent) >> 9;
+ inode_add_bytes(inode, extent_end - end);
}
}
@@ -801,7 +802,8 @@
u64 disk_bytenr = le64_to_cpu(old.disk_bytenr);
if (disk_bytenr != 0) {
- dec_i_blocks(inode, le64_to_cpu(old.num_bytes));
+ inode_sub_bytes(inode,
+ le64_to_cpu(old.num_bytes));
ret = btrfs_free_extent(trans, root,
disk_bytenr,
le64_to_cpu(old.disk_num_bytes),
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index ff0c359..f9df89c 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -652,7 +652,7 @@
BUG_ON(ret);
btrfs_release_path(root, path);
- inode->i_blocks += ordered_extent->len >> 9;
+ inode_add_bytes(inode, ordered_extent->len);
unlock_extent(io_tree, ordered_extent->file_offset,
ordered_extent->file_offset + ordered_extent->len - 1,
GFP_NOFS);
@@ -1104,7 +1104,7 @@
inode->i_ctime.tv_sec = btrfs_timespec_sec(leaf, tspec);
inode->i_ctime.tv_nsec = btrfs_timespec_nsec(leaf, tspec);
- inode->i_blocks = btrfs_inode_nblocks(leaf, inode_item);
+ inode_set_bytes(inode, btrfs_inode_nbytes(leaf, inode_item));
BTRFS_I(inode)->generation = btrfs_inode_generation(leaf, inode_item);
inode->i_generation = BTRFS_I(inode)->generation;
inode->i_rdev = 0;
@@ -1184,7 +1184,7 @@
btrfs_set_timespec_nsec(leaf, btrfs_inode_ctime(item),
inode->i_ctime.tv_nsec);
- btrfs_set_inode_nblocks(leaf, item, inode->i_blocks);
+ btrfs_set_inode_nbytes(leaf, item, inode_get_bytes(inode));
btrfs_set_inode_generation(leaf, item, BTRFS_I(inode)->generation);
btrfs_set_inode_transid(leaf, item, trans->transid);
btrfs_set_inode_rdev(leaf, item, inode->i_rdev);
@@ -1679,7 +1679,7 @@
num_dec = (orig_num_bytes -
extent_num_bytes);
if (root->ref_cows && extent_start != 0)
- dec_i_blocks(inode, num_dec);
+ inode_sub_bytes(inode, num_dec);
btrfs_mark_buffer_dirty(leaf);
} else {
extent_num_bytes =
@@ -1690,7 +1690,7 @@
if (extent_start != 0) {
found_extent = 1;
if (root->ref_cows)
- dec_i_blocks(inode, num_dec);
+ inode_sub_bytes(inode, num_dec);
}
root_gen = btrfs_header_generation(leaf);
root_owner = btrfs_header_owner(leaf);
@@ -1700,8 +1700,8 @@
u32 size = new_size - found_key.offset;
if (root->ref_cows) {
- dec_i_blocks(inode, item_end + 1 -
- found_key.offset - size);
+ inode_sub_bytes(inode, item_end + 1 -
+ new_size);
}
size =
btrfs_file_extent_calc_inline_size(size);
@@ -1709,8 +1709,8 @@
size, 1);
BUG_ON(ret);
} else if (root->ref_cows) {
- dec_i_blocks(inode, item_end + 1 -
- found_key.offset);
+ inode_sub_bytes(inode, item_end + 1 -
+ found_key.offset);
}
}
delete:
@@ -2514,7 +2514,7 @@
inode->i_gid = current->fsgid;
inode->i_mode = mode;
inode->i_ino = objectid;
- inode->i_blocks = 0;
+ inode_set_bytes(inode, 0);
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
inode_item = btrfs_item_ptr(path->nodes[0], path->slots[0],
struct btrfs_inode_item);
@@ -3557,7 +3557,8 @@
struct inode *inode = dentry->d_inode;
generic_fillattr(inode, stat);
stat->blksize = PAGE_CACHE_SIZE;
- stat->blocks = inode->i_blocks + (BTRFS_I(inode)->delalloc_bytes >> 9);
+ stat->blocks = (inode_get_bytes(inode) +
+ BTRFS_I(inode)->delalloc_bytes) >> 9;
return 0;
}
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 04de767..ab7a0f6 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -99,7 +99,7 @@
inode_item->generation = cpu_to_le64(1);
inode_item->size = cpu_to_le64(3);
inode_item->nlink = cpu_to_le32(1);
- inode_item->nblocks = cpu_to_le64(1);
+ inode_item->nbytes = cpu_to_le64(root->leafsize);
inode_item->mode = cpu_to_le32(S_IFDIR | 0755);
btrfs_set_root_bytenr(&root_item, leaf->start);
@@ -671,7 +671,7 @@
btrfs_release_path(root, path);
if (ret == 0) {
inode->i_mtime = inode->i_ctime = CURRENT_TIME;
- inode->i_blocks = src->i_blocks;
+ inode_set_bytes(inode, inode_get_bytes(src));
btrfs_i_size_write(inode, src->i_size);
BTRFS_I(inode)->flags = BTRFS_I(src)->flags;
ret = btrfs_update_inode(trans, root, inode);
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index 88bbfd9..8df719a 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -113,7 +113,7 @@
inode_item->generation = cpu_to_le64(1);
inode_item->size = cpu_to_le64(3);
inode_item->nlink = cpu_to_le32(1);
- inode_item->nblocks = cpu_to_le64(1);
+ inode_item->nbytes = cpu_to_le64(root->leafsize);
inode_item->mode = cpu_to_le32(S_IFDIR | 0755);
btrfs_set_root_bytenr(&root_item, leaf->start);
@@ -598,8 +598,8 @@
ret = overwrite_item(trans, root, path, eb, slot, key);
BUG_ON(ret);
- /* btrfs_drop_extents changes i_blocks, update it here */
- inode->i_blocks += (extent_end - start) >> 9;
+ /* btrfs_drop_extents changes i_bytes & i_blocks, update it here */
+ inode_add_bytes(inode, extent_end - start);
btrfs_update_inode(trans, root, inode);
out:
if (inode)