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Diffstat (limited to 'fs/btrfs/inode.c')
-rw-r--r--fs/btrfs/inode.c87
1 files changed, 37 insertions, 50 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 38ea51d64553..c0b2421c2925 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -239,12 +239,13 @@ static int btrfs_init_inode_security(struct btrfs_trans_handle *trans,
* no overlapping inline items exist in the btree
*/
static int insert_inline_extent(struct btrfs_trans_handle *trans,
- struct btrfs_path *path, bool extent_inserted,
- struct btrfs_root *root, struct inode *inode,
- u64 start, size_t size, size_t compressed_size,
+ struct btrfs_path *path,
+ struct btrfs_inode *inode, bool extent_inserted,
+ size_t size, size_t compressed_size,
int compress_type,
struct page **compressed_pages)
{
+ struct btrfs_root *root = inode->root;
struct extent_buffer *leaf;
struct page *page = NULL;
char *kaddr;
@@ -252,7 +253,6 @@ static int insert_inline_extent(struct btrfs_trans_handle *trans,
struct btrfs_file_extent_item *ei;
int ret;
size_t cur_size = size;
- unsigned long offset;
ASSERT((compressed_size > 0 && compressed_pages) ||
(compressed_size == 0 && !compressed_pages));
@@ -264,8 +264,8 @@ static int insert_inline_extent(struct btrfs_trans_handle *trans,
struct btrfs_key key;
size_t datasize;
- key.objectid = btrfs_ino(BTRFS_I(inode));
- key.offset = start;
+ key.objectid = btrfs_ino(inode);
+ key.offset = 0;
key.type = BTRFS_EXTENT_DATA_KEY;
datasize = btrfs_file_extent_calc_inline_size(cur_size);
@@ -303,12 +303,10 @@ static int insert_inline_extent(struct btrfs_trans_handle *trans,
btrfs_set_file_extent_compression(leaf, ei,
compress_type);
} else {
- page = find_get_page(inode->i_mapping,
- start >> PAGE_SHIFT);
+ page = find_get_page(inode->vfs_inode.i_mapping, 0);
btrfs_set_file_extent_compression(leaf, ei, 0);
kaddr = kmap_atomic(page);
- offset = offset_in_page(start);
- write_extent_buffer(leaf, kaddr + offset, ptr, size);
+ write_extent_buffer(leaf, kaddr, ptr, size);
kunmap_atomic(kaddr);
put_page(page);
}
@@ -319,8 +317,8 @@ static int insert_inline_extent(struct btrfs_trans_handle *trans,
* We align size to sectorsize for inline extents just for simplicity
* sake.
*/
- size = ALIGN(size, root->fs_info->sectorsize);
- ret = btrfs_inode_set_file_extent_range(BTRFS_I(inode), start, size);
+ ret = btrfs_inode_set_file_extent_range(inode, 0,
+ ALIGN(size, root->fs_info->sectorsize));
if (ret)
goto fail;
@@ -333,7 +331,8 @@ static int insert_inline_extent(struct btrfs_trans_handle *trans,
* before we unlock the pages. Otherwise we
* could end up racing with unlink.
*/
- BTRFS_I(inode)->disk_i_size = inode->i_size;
+ inode->disk_i_size = i_size_read(&inode->vfs_inode);
+
fail:
return ret;
}
@@ -344,8 +343,8 @@ fail:
* does the checks required to make sure the data is small enough
* to fit as an inline extent.
*/
-static noinline int cow_file_range_inline(struct btrfs_inode *inode, u64 start,
- u64 end, size_t compressed_size,
+static noinline int cow_file_range_inline(struct btrfs_inode *inode, u64 size,
+ size_t compressed_size,
int compress_type,
struct page **compressed_pages)
{
@@ -353,26 +352,21 @@ static noinline int cow_file_range_inline(struct btrfs_inode *inode, u64 start,
struct btrfs_root *root = inode->root;
struct btrfs_fs_info *fs_info = root->fs_info;
struct btrfs_trans_handle *trans;
- u64 isize = i_size_read(&inode->vfs_inode);
- u64 actual_end = min(end + 1, isize);
- u64 inline_len = actual_end - start;
- u64 aligned_end = ALIGN(end, fs_info->sectorsize);
- u64 data_len = inline_len;
+ u64 data_len = (compressed_size ?: size);
int ret;
struct btrfs_path *path;
- if (compressed_size)
- data_len = compressed_size;
-
- if (start > 0 ||
- actual_end > fs_info->sectorsize ||
+ /*
+ * We can create an inline extent if it ends at or beyond the current
+ * i_size, is no larger than a sector (decompressed), and the (possibly
+ * compressed) data fits in a leaf and the configured maximum inline
+ * size.
+ */
+ if (size < i_size_read(&inode->vfs_inode) ||
+ size > fs_info->sectorsize ||
data_len > BTRFS_MAX_INLINE_DATA_SIZE(fs_info) ||
- (!compressed_size &&
- (actual_end & (fs_info->sectorsize - 1)) == 0) ||
- end + 1 < isize ||
- data_len > fs_info->max_inline) {
+ data_len > fs_info->max_inline)
return 1;
- }
path = btrfs_alloc_path();
if (!path)
@@ -386,30 +380,20 @@ static noinline int cow_file_range_inline(struct btrfs_inode *inode, u64 start,
trans->block_rsv = &inode->block_rsv;
drop_args.path = path;
- drop_args.start = start;
- drop_args.end = aligned_end;
+ drop_args.start = 0;
+ drop_args.end = fs_info->sectorsize;
drop_args.drop_cache = true;
drop_args.replace_extent = true;
-
- if (compressed_size && compressed_pages)
- drop_args.extent_item_size = btrfs_file_extent_calc_inline_size(
- compressed_size);
- else
- drop_args.extent_item_size = btrfs_file_extent_calc_inline_size(
- inline_len);
-
+ drop_args.extent_item_size = btrfs_file_extent_calc_inline_size(data_len);
ret = btrfs_drop_extents(trans, root, inode, &drop_args);
if (ret) {
btrfs_abort_transaction(trans, ret);
goto out;
}
- if (isize > actual_end)
- inline_len = min_t(u64, isize, actual_end);
- ret = insert_inline_extent(trans, path, drop_args.extent_inserted,
- root, &inode->vfs_inode, start,
- inline_len, compressed_size,
- compress_type, compressed_pages);
+ ret = insert_inline_extent(trans, path, inode, drop_args.extent_inserted,
+ size, compressed_size, compress_type,
+ compressed_pages);
if (ret && ret != -ENOSPC) {
btrfs_abort_transaction(trans, ret);
goto out;
@@ -418,7 +402,7 @@ static noinline int cow_file_range_inline(struct btrfs_inode *inode, u64 start,
goto out;
}
- btrfs_update_inode_bytes(inode, inline_len, drop_args.bytes_found);
+ btrfs_update_inode_bytes(inode, size, drop_args.bytes_found);
ret = btrfs_update_inode(trans, root, inode);
if (ret && ret != -ENOSPC) {
btrfs_abort_transaction(trans, ret);
@@ -739,12 +723,12 @@ cont:
/* we didn't compress the entire range, try
* to make an uncompressed inline extent.
*/
- ret = cow_file_range_inline(BTRFS_I(inode), start, end,
+ ret = cow_file_range_inline(BTRFS_I(inode), actual_end,
0, BTRFS_COMPRESS_NONE,
NULL);
} else {
/* try making a compressed inline extent */
- ret = cow_file_range_inline(BTRFS_I(inode), start, end,
+ ret = cow_file_range_inline(BTRFS_I(inode), actual_end,
total_compressed,
compress_type, pages);
}
@@ -1159,8 +1143,11 @@ static noinline int cow_file_range(struct btrfs_inode *inode,
* So here we skip inline extent creation completely.
*/
if (start == 0 && fs_info->sectorsize == PAGE_SIZE) {
+ u64 actual_end = min_t(u64, i_size_read(&inode->vfs_inode),
+ end + 1);
+
/* lets try to make an inline extent */
- ret = cow_file_range_inline(inode, start, end, 0,
+ ret = cow_file_range_inline(inode, actual_end, 0,
BTRFS_COMPRESS_NONE, NULL);
if (ret == 0) {
/*
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-21 20:30:00 +0300