#include "transaction.h"
#include "print-tree.h"
#include "crc32c.h"
+#include "internal.h"
-#define MAX_CSUM_ITEMS(r,size) ((((BTRFS_LEAF_DATA_SIZE(r) - \
+#define MAX_CSUM_ITEMS(r, size) ((((BTRFS_LEAF_DATA_SIZE(r->fs_info) - \
sizeof(struct btrfs_item) * 2) / \
size) - 1))
-int btrfs_create_file(struct btrfs_trans_handle *trans,
- struct btrfs_root *root, u64 dirid, u64 *objectid)
-{
- return 0;
-}
-
int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
u64 objectid, u64 pos, u64 offset,
u64 disk_num_bytes, u64 num_bytes)
{
int ret = 0;
+ int is_hole = 0;
struct btrfs_file_extent_item *item;
struct btrfs_key file_key;
struct btrfs_path *path;
struct extent_buffer *leaf;
+ if (offset == 0)
+ is_hole = 1;
+ /* For NO_HOLES, we don't insert hole file extent */
+ if (btrfs_fs_incompat(root->fs_info, NO_HOLES) && is_hole)
+ return 0;
+
+ /* For hole, its disk_bytenr and disk_num_bytes must be 0 */
+ if (is_hole)
+ disk_num_bytes = 0;
+
path = btrfs_alloc_path();
- BUG_ON(!path);
+ if (!path)
+ return -ENOMEM;
+
file_key.objectid = objectid;
file_key.offset = pos;
- btrfs_set_key_type(&file_key, BTRFS_EXTENT_DATA_KEY);
+ file_key.type = BTRFS_EXTENT_DATA_KEY;
ret = btrfs_insert_empty_item(trans, root, path, &file_key,
sizeof(*item));
int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
struct btrfs_root *root, u64 objectid,
- u64 offset, char *buffer, size_t size)
+ u64 offset, const char *buffer, size_t size)
{
struct btrfs_key key;
struct btrfs_path *path;
key.objectid = objectid;
key.offset = offset;
- btrfs_set_key_type(&key, BTRFS_EXTENT_DATA_KEY);
+ key.type = BTRFS_EXTENT_DATA_KEY;
datasize = btrfs_file_extent_calc_inline_size(size);
ret = btrfs_insert_empty_item(trans, root, path, &key, datasize);
return err;
}
-struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
- struct btrfs_root *root,
- struct btrfs_path *path,
- u64 bytenr, int cow)
+static struct btrfs_csum_item *
+btrfs_lookup_csum(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ struct btrfs_path *path,
+ u64 bytenr, int cow)
{
int ret;
struct btrfs_key file_key;
struct extent_buffer *leaf;
u64 csum_offset = 0;
u16 csum_size =
- btrfs_super_csum_size(&root->fs_info->super_copy);
+ btrfs_super_csum_size(root->fs_info->super_copy);
int csums_in_item;
file_key.objectid = BTRFS_EXTENT_CSUM_OBJECTID;
file_key.offset = bytenr;
- btrfs_set_key_type(&file_key, BTRFS_EXTENT_CSUM_KEY);
+ file_key.type = BTRFS_EXTENT_CSUM_KEY;
ret = btrfs_search_slot(trans, root, &file_key, path, 0, cow);
if (ret < 0)
goto fail;
goto fail;
path->slots[0]--;
btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]);
- if (btrfs_key_type(&found_key) != BTRFS_EXTENT_CSUM_KEY)
+ if (found_key.type != BTRFS_EXTENT_CSUM_KEY)
goto fail;
- csum_offset = (bytenr - found_key.offset) / root->sectorsize;
+ csum_offset = (bytenr - found_key.offset) /
+ root->fs_info->sectorsize;
csums_in_item = btrfs_item_size_nr(leaf, path->slots[0]);
csums_in_item /= csum_size;
return ERR_PTR(ret);
}
-int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
- struct btrfs_root *root,
- struct btrfs_path *path, u64 objectid,
- u64 offset, int mod)
-{
- int ret;
- struct btrfs_key file_key;
- int ins_len = mod < 0 ? -1 : 0;
- int cow = mod != 0;
-
- file_key.objectid = objectid;
- file_key.offset = offset;
- btrfs_set_key_type(&file_key, BTRFS_EXTENT_DATA_KEY);
- ret = btrfs_search_slot(trans, root, &file_key, path, ins_len, cow);
- return ret;
-}
-
int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
struct btrfs_root *root, u64 alloc_end,
u64 bytenr, char *data, size_t len)
{
- int ret;
+ int ret = 0;
struct btrfs_key file_key;
struct btrfs_key found_key;
u64 next_offset = (u64)-1;
struct extent_buffer *leaf = NULL;
u64 csum_offset;
u32 csum_result = ~(u32)0;
+ u32 sectorsize = root->fs_info->sectorsize;
u32 nritems;
u32 ins_size;
u16 csum_size =
- btrfs_super_csum_size(&root->fs_info->super_copy);
+ btrfs_super_csum_size(root->fs_info->super_copy);
path = btrfs_alloc_path();
- BUG_ON(!path);
+ if (!path)
+ return -ENOMEM;
file_key.objectid = BTRFS_EXTENT_CSUM_OBJECTID;
file_key.offset = bytenr;
item = btrfs_lookup_csum(trans, root, path, bytenr, 1);
if (!IS_ERR(item)) {
leaf = path->nodes[0];
+ ret = 0;
goto found;
}
ret = PTR_ERR(item);
* at this point, we know the tree has an item, but it isn't big
* enough yet to put our csum in. Grow it
*/
- btrfs_release_path(root, path);
+ btrfs_release_path(path);
ret = btrfs_search_slot(trans, root, &file_key, path,
csum_size, 1);
if (ret < 0)
path->slots[0]--;
leaf = path->nodes[0];
btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]);
- csum_offset = (file_key.offset - found_key.offset) / root->sectorsize;
+ csum_offset = (file_key.offset - found_key.offset) / sectorsize;
if (found_key.objectid != BTRFS_EXTENT_CSUM_OBJECTID ||
found_key.type != BTRFS_EXTENT_CSUM_KEY ||
csum_offset >= MAX_CSUM_ITEMS(root, csum_size)) {
diff = diff - btrfs_item_size_nr(leaf, path->slots[0]);
if (diff != csum_size)
goto insert;
- ret = btrfs_extend_item(trans, root, path, diff);
+ ret = btrfs_extend_item(root, path, diff);
BUG_ON(ret);
goto csum;
}
insert:
- btrfs_release_path(root, path);
+ btrfs_release_path(path);
csum_offset = 0;
if (found_next) {
u64 tmp = min(alloc_end, next_offset);
tmp -= file_key.offset;
- tmp /= root->sectorsize;
+ tmp /= sectorsize;
tmp = max((u64)1, tmp);
tmp = min(tmp, (u64)MAX_CSUM_ITEMS(root, csum_size));
ins_size = csum_size * tmp;
item = (struct btrfs_csum_item *)((unsigned char *)item +
csum_offset * csum_size);
found:
- csum_result = btrfs_csum_data(root, data, csum_result, len);
- btrfs_csum_final(csum_result, (char *)&csum_result);
+ csum_result = btrfs_csum_data(data, csum_result, len);
+ btrfs_csum_final(csum_result, (u8 *)&csum_result);
if (csum_result == 0) {
printk("csum result is 0 for block %llu\n",
(unsigned long long)bytenr);
csum_size);
btrfs_mark_buffer_dirty(path->nodes[0]);
fail:
- btrfs_release_path(root, path);
btrfs_free_path(path);
return ret;
}
* This calls btrfs_truncate_item with the correct args based on the
* overlap, and fixes up the key as required.
*/
-static noinline int truncate_one_csum(struct btrfs_trans_handle *trans,
- struct btrfs_root *root,
+static noinline int truncate_one_csum(struct btrfs_root *root,
struct btrfs_path *path,
struct btrfs_key *key,
u64 bytenr, u64 len)
{
struct extent_buffer *leaf;
u16 csum_size =
- btrfs_super_csum_size(&root->fs_info->super_copy);
+ btrfs_super_csum_size(root->fs_info->super_copy);
u64 csum_end;
u64 end_byte = bytenr + len;
- u32 blocksize = root->sectorsize;
+ u32 blocksize = root->fs_info->sectorsize;
int ret;
leaf = path->nodes[0];
csum_end = btrfs_item_size_nr(leaf, path->slots[0]) / csum_size;
- csum_end *= root->sectorsize;
+ csum_end *= root->fs_info->sectorsize;
csum_end += key->offset;
if (key->offset < bytenr && csum_end <= end_byte) {
*/
u32 new_size = (bytenr - key->offset) / blocksize;
new_size *= csum_size;
- ret = btrfs_truncate_item(trans, root, path, new_size, 1);
+ ret = btrfs_truncate_item(root, path, new_size, 1);
BUG_ON(ret);
} else if (key->offset >= bytenr && csum_end > end_byte &&
end_byte > key->offset) {
u32 new_size = (csum_end - end_byte) / blocksize;
new_size *= csum_size;
- ret = btrfs_truncate_item(trans, root, path, new_size, 0);
+ ret = btrfs_truncate_item(root, path, new_size, 0);
BUG_ON(ret);
key->offset = end_byte;
- ret = btrfs_set_item_key_safe(trans, root, path, key);
+ ret = btrfs_set_item_key_safe(root, path, key);
BUG_ON(ret);
} else {
BUG();
struct extent_buffer *leaf;
int ret;
u16 csum_size =
- btrfs_super_csum_size(&root->fs_info->super_copy);
- int blocksize = root->sectorsize;
+ btrfs_super_csum_size(root->fs_info->super_copy);
+ int blocksize = root->fs_info->sectorsize;
root = root->fs_info->csum_root;
path = btrfs_alloc_path();
+ if (!path)
+ return -ENOMEM;
while (1) {
key.objectid = BTRFS_EXTENT_CSUM_OBJECTID;
key.offset = end_byte - 1;
} else {
- ret = truncate_one_csum(trans, root, path,
- &key, bytenr, len);
+ ret = truncate_one_csum(root, path, &key, bytenr, len);
BUG_ON(ret);
}
- btrfs_release_path(root, path);
+ btrfs_release_path(path);
}
out:
btrfs_free_path(path);
projects / platform / upstream / btrfs-progs.git / blobdiff