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Diffstat (limited to 'fs/btrfs/file-item.c')
-rw-r--r--fs/btrfs/file-item.c88
1 files changed, 51 insertions, 37 deletions
diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c
index e58fb5347e65..bce95f871750 100644
--- a/fs/btrfs/file-item.c
+++ b/fs/btrfs/file-item.c
@@ -430,8 +430,7 @@ blk_status_t btrfs_lookup_bio_sums(struct btrfs_bio *bbio)
memset(csum_dst, 0, csum_size);
count = 1;
- if (inode->root->root_key.objectid ==
- BTRFS_DATA_RELOC_TREE_OBJECTID) {
+ if (btrfs_root_id(inode->root) == BTRFS_DATA_RELOC_TREE_OBJECTID) {
u64 file_offset = bbio->file_offset + bio_offset;
set_extent_bit(&inode->io_tree, file_offset,
@@ -450,9 +449,22 @@ blk_status_t btrfs_lookup_bio_sums(struct btrfs_bio *bbio)
return ret;
}
+/*
+ * Search for checksums for a given logical range.
+ *
+ * @root: The root where to look for checksums.
+ * @start: Logical address of target checksum range.
+ * @end: End offset (inclusive) of the target checksum range.
+ * @list: List for adding each checksum that was found.
+ * Can be NULL in case the caller only wants to check if
+ * there any checksums for the range.
+ * @nowait: Indicate if the search must be non-blocking or not.
+ *
+ * Return < 0 on error, 0 if no checksums were found, or 1 if checksums were
+ * found.
+ */
int btrfs_lookup_csums_list(struct btrfs_root *root, u64 start, u64 end,
- struct list_head *list, int search_commit,
- bool nowait)
+ struct list_head *list, bool nowait)
{
struct btrfs_fs_info *fs_info = root->fs_info;
struct btrfs_key key;
@@ -460,8 +472,8 @@ int btrfs_lookup_csums_list(struct btrfs_root *root, u64 start, u64 end,
struct extent_buffer *leaf;
struct btrfs_ordered_sum *sums;
struct btrfs_csum_item *item;
- LIST_HEAD(tmplist);
int ret;
+ bool found_csums = false;
ASSERT(IS_ALIGNED(start, fs_info->sectorsize) &&
IS_ALIGNED(end + 1, fs_info->sectorsize));
@@ -471,11 +483,6 @@ int btrfs_lookup_csums_list(struct btrfs_root *root, u64 start, u64 end,
return -ENOMEM;
path->nowait = nowait;
- if (search_commit) {
- path->skip_locking = 1;
- path->reada = READA_FORWARD;
- path->search_commit_root = 1;
- }
key.objectid = BTRFS_EXTENT_CSUM_OBJECTID;
key.offset = start;
@@ -483,7 +490,7 @@ int btrfs_lookup_csums_list(struct btrfs_root *root, u64 start, u64 end,
ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
if (ret < 0)
- goto fail;
+ goto out;
if (ret > 0 && path->slots[0] > 0) {
leaf = path->nodes[0];
btrfs_item_key_to_cpu(leaf, &key, path->slots[0] - 1);
@@ -518,7 +525,7 @@ int btrfs_lookup_csums_list(struct btrfs_root *root, u64 start, u64 end,
if (path->slots[0] >= btrfs_header_nritems(leaf)) {
ret = btrfs_next_leaf(root, path);
if (ret < 0)
- goto fail;
+ goto out;
if (ret > 0)
break;
leaf = path->nodes[0];
@@ -540,6 +547,10 @@ int btrfs_lookup_csums_list(struct btrfs_root *root, u64 start, u64 end,
continue;
}
+ found_csums = true;
+ if (!list)
+ goto out;
+
csum_end = min(csum_end, end + 1);
item = btrfs_item_ptr(path->nodes[0], path->slots[0],
struct btrfs_csum_item);
@@ -553,7 +564,7 @@ int btrfs_lookup_csums_list(struct btrfs_root *root, u64 start, u64 end,
GFP_NOFS);
if (!sums) {
ret = -ENOMEM;
- goto fail;
+ goto out;
}
sums->logical = start;
@@ -567,21 +578,24 @@ int btrfs_lookup_csums_list(struct btrfs_root *root, u64 start, u64 end,
bytes_to_csum_size(fs_info, size));
start += size;
- list_add_tail(&sums->list, &tmplist);
+ list_add_tail(&sums->list, list);
}
path->slots[0]++;
}
- ret = 0;
-fail:
- while (ret < 0 && !list_empty(&tmplist)) {
- sums = list_entry(tmplist.next, struct btrfs_ordered_sum, list);
- list_del(&sums->list);
- kfree(sums);
+out:
+ btrfs_free_path(path);
+ if (ret < 0) {
+ if (list) {
+ struct btrfs_ordered_sum *tmp_sums;
+
+ list_for_each_entry_safe(sums, tmp_sums, list, list)
+ kfree(sums);
+ }
+
+ return ret;
}
- list_splice_tail(&tmplist, list);
- btrfs_free_path(path);
- return ret;
+ return found_csums ? 1 : 0;
}
/*
@@ -870,8 +884,8 @@ int btrfs_del_csums(struct btrfs_trans_handle *trans,
const u32 csum_size = fs_info->csum_size;
u32 blocksize_bits = fs_info->sectorsize_bits;
- ASSERT(root->root_key.objectid == BTRFS_CSUM_TREE_OBJECTID ||
- root->root_key.objectid == BTRFS_TREE_LOG_OBJECTID);
+ ASSERT(btrfs_root_id(root) == BTRFS_CSUM_TREE_OBJECTID ||
+ btrfs_root_id(root) == BTRFS_TREE_LOG_OBJECTID);
path = btrfs_alloc_path();
if (!path)
@@ -1171,7 +1185,7 @@ extend_csum:
* search, etc, because log trees are temporary anyway and it
* would only save a few bytes of leaf space.
*/
- if (root->root_key.objectid == BTRFS_TREE_LOG_OBJECTID) {
+ if (btrfs_root_id(root) == BTRFS_TREE_LOG_OBJECTID) {
if (path->slots[0] + 1 >=
btrfs_header_nritems(path->nodes[0])) {
ret = find_next_csum_offset(root, path, &next_offset);
@@ -1265,20 +1279,19 @@ void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
struct extent_buffer *leaf = path->nodes[0];
const int slot = path->slots[0];
struct btrfs_key key;
- u64 extent_start, extent_end;
+ u64 extent_start;
u64 bytenr;
u8 type = btrfs_file_extent_type(leaf, fi);
int compress_type = btrfs_file_extent_compression(leaf, fi);
btrfs_item_key_to_cpu(leaf, &key, slot);
extent_start = key.offset;
- extent_end = btrfs_file_extent_end(path);
em->ram_bytes = btrfs_file_extent_ram_bytes(leaf, fi);
em->generation = btrfs_file_extent_generation(leaf, fi);
if (type == BTRFS_FILE_EXTENT_REG ||
type == BTRFS_FILE_EXTENT_PREALLOC) {
em->start = extent_start;
- em->len = extent_end - extent_start;
+ em->len = btrfs_file_extent_end(path) - extent_start;
em->orig_start = extent_start -
btrfs_file_extent_offset(leaf, fi);
em->orig_block_len = btrfs_file_extent_disk_num_bytes(leaf, fi);
@@ -1299,9 +1312,12 @@ void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
em->flags |= EXTENT_FLAG_PREALLOC;
}
} else if (type == BTRFS_FILE_EXTENT_INLINE) {
+ /* Tree-checker has ensured this. */
+ ASSERT(extent_start == 0);
+
em->block_start = EXTENT_MAP_INLINE;
- em->start = extent_start;
- em->len = extent_end - extent_start;
+ em->start = 0;
+ em->len = fs_info->sectorsize;
/*
* Initialize orig_start and block_len with the same values
* as in inode.c:btrfs_get_extent().
@@ -1313,7 +1329,7 @@ void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
btrfs_err(fs_info,
"unknown file extent item type %d, inode %llu, offset %llu, "
"root %llu", type, btrfs_ino(inode), extent_start,
- root->root_key.objectid);
+ btrfs_root_id(root));
}
}
@@ -1334,12 +1350,10 @@ u64 btrfs_file_extent_end(const struct btrfs_path *path)
ASSERT(key.type == BTRFS_EXTENT_DATA_KEY);
fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item);
- if (btrfs_file_extent_type(leaf, fi) == BTRFS_FILE_EXTENT_INLINE) {
- end = btrfs_file_extent_ram_bytes(leaf, fi);
- end = ALIGN(key.offset + end, leaf->fs_info->sectorsize);
- } else {
+ if (btrfs_file_extent_type(leaf, fi) == BTRFS_FILE_EXTENT_INLINE)
+ end = leaf->fs_info->sectorsize;
+ else
end = key.offset + btrfs_file_extent_num_bytes(leaf, fi);
- }
return end;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-08 12:48:20 +0000