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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License v2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*/
#include <time.h>
#include "ctree.h"
#include "internal.h"
#include "messages.h"
#include "transaction.h"
#include "check/common.h"
/*
* Search in csum tree to find how many bytes of range [@start, @start + @len)
* has the corresponding csum item.
*
* @start: range start
* @len: range length
* @found: return value of found csum bytes
* unit is BYTE.
*/
int count_csum_range(struct btrfs_fs_info *fs_info, u64 start,
u64 len, u64 *found)
{
struct btrfs_key key;
struct btrfs_path path;
struct extent_buffer *leaf;
int ret;
size_t size;
*found = 0;
u64 csum_end;
u16 csum_size = btrfs_super_csum_size(fs_info->super_copy);
btrfs_init_path(&path);
key.objectid = BTRFS_EXTENT_CSUM_OBJECTID;
key.offset = start;
key.type = BTRFS_EXTENT_CSUM_KEY;
ret = btrfs_search_slot(NULL, fs_info->csum_root,
&key, &path, 0, 0);
if (ret < 0)
goto out;
if (ret > 0 && path.slots[0] > 0) {
leaf = path.nodes[0];
btrfs_item_key_to_cpu(leaf, &key, path.slots[0] - 1);
if (key.objectid == BTRFS_EXTENT_CSUM_OBJECTID &&
key.type == BTRFS_EXTENT_CSUM_KEY)
path.slots[0]--;
}
while (len > 0) {
leaf = path.nodes[0];
if (path.slots[0] >= btrfs_header_nritems(leaf)) {
ret = btrfs_next_leaf(fs_info->csum_root, &path);
if (ret > 0)
break;
else if (ret < 0)
goto out;
leaf = path.nodes[0];
}
btrfs_item_key_to_cpu(leaf, &key, path.slots[0]);
if (key.objectid != BTRFS_EXTENT_CSUM_OBJECTID ||
key.type != BTRFS_EXTENT_CSUM_KEY)
break;
btrfs_item_key_to_cpu(leaf, &key, path.slots[0]);
if (key.offset >= start + len)
break;
if (key.offset > start)
start = key.offset;
size = btrfs_item_size_nr(leaf, path.slots[0]);
csum_end = key.offset + (size / csum_size) *
fs_info->sectorsize;
if (csum_end > start) {
size = min(csum_end - start, len);
len -= size;
start += size;
*found += size;
}
path.slots[0]++;
}
out:
btrfs_release_path(&path);
if (ret < 0)
return ret;
return 0;
}
/*
* Wrapper to insert one inode item into given @root
* Timestamp will be set to current time.
*
* @root: the root to insert inode item into
* @ino: inode number
* @size: inode size
* @nbytes: nbytes (real used size, without hole)
* @nlink: number of links
* @mode: file mode, including S_IF* bits
*/
int insert_inode_item(struct btrfs_trans_handle *trans,
struct btrfs_root *root, u64 ino, u64 size,
u64 nbytes, u64 nlink, u32 mode)
{
struct btrfs_inode_item ii;
time_t now = time(NULL);
int ret;
btrfs_set_stack_inode_size(&ii, size);
btrfs_set_stack_inode_nbytes(&ii, nbytes);
btrfs_set_stack_inode_nlink(&ii, nlink);
btrfs_set_stack_inode_mode(&ii, mode);
btrfs_set_stack_inode_generation(&ii, trans->transid);
btrfs_set_stack_timespec_nsec(&ii.atime, 0);
btrfs_set_stack_timespec_sec(&ii.ctime, now);
btrfs_set_stack_timespec_nsec(&ii.ctime, 0);
btrfs_set_stack_timespec_sec(&ii.mtime, now);
btrfs_set_stack_timespec_nsec(&ii.mtime, 0);
btrfs_set_stack_timespec_sec(&ii.otime, 0);
btrfs_set_stack_timespec_nsec(&ii.otime, 0);
ret = btrfs_insert_inode(trans, root, ino, &ii);
ASSERT(!ret);
warning("root %llu inode %llu recreating inode item, this may "
"be incomplete, please check permissions and content after "
"the fsck completes.\n", (unsigned long long)root->objectid,
(unsigned long long)ino);
return 0;
}
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