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btrfs-progs: check: Move link_inode_to_lostfound function to common.c

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Reviewed-by: Su Yue <suy.fnst@cn.fujitsu.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Qu Wenruo 2018-01-18 16:07:19 +08:00 committed by David Sterba
parent a20557599e
commit 4e84c8251a
3 changed files with 98 additions and 92 deletions
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93
check/common.c
View File

@ -19,6 +19,7 @@
#include "internal.h" #include "internal.h"
#include "messages.h" #include "messages.h"
#include "transaction.h" #include "transaction.h"
#include "utils.h"
#include "check/common.h" #include "check/common.h"
/* /*
@ -144,3 +145,95 @@ int insert_inode_item(struct btrfs_trans_handle *trans,
return 0; return 0;
} }
static int get_highest_inode(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct btrfs_path *path,
u64 *highest_ino)
{
struct btrfs_key key, found_key;
int ret;
btrfs_init_path(path);
key.objectid = BTRFS_LAST_FREE_OBJECTID;
key.offset = -1;
key.type = BTRFS_INODE_ITEM_KEY;
ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
if (ret == 1) {
btrfs_item_key_to_cpu(path->nodes[0], &found_key,
path->slots[0] - 1);
*highest_ino = found_key.objectid;
ret = 0;
}
if (*highest_ino >= BTRFS_LAST_FREE_OBJECTID)
ret = -EOVERFLOW;
btrfs_release_path(path);
return ret;
}
/*
* Link inode to dir 'lost+found'. Increase @ref_count.
*
* Returns 0 means success.
* Returns <0 means failure.
*/
int link_inode_to_lostfound(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path,
u64 ino, char *namebuf, u32 name_len,
u8 filetype, u64 *ref_count)
{
char *dir_name = "lost+found";
u64 lost_found_ino;
int ret;
u32 mode = 0700;
btrfs_release_path(path);
ret = get_highest_inode(trans, root, path, &lost_found_ino);
if (ret < 0)
goto out;
lost_found_ino++;
ret = btrfs_mkdir(trans, root, dir_name, strlen(dir_name),
BTRFS_FIRST_FREE_OBJECTID, &lost_found_ino,
mode);
if (ret < 0) {
error("failed to create '%s' dir: %s", dir_name, strerror(-ret));
goto out;
}
ret = btrfs_add_link(trans, root, ino, lost_found_ino,
namebuf, name_len, filetype, NULL, 1, 0);
/*
* Add ".INO" suffix several times to handle case where
* "FILENAME.INO" is already taken by another file.
*/
while (ret == -EEXIST) {
/*
* Conflicting file name, add ".INO" as suffix * +1 for '.'
*/
if (name_len + count_digits(ino) + 1 > BTRFS_NAME_LEN) {
ret = -EFBIG;
goto out;
}
snprintf(namebuf + name_len, BTRFS_NAME_LEN - name_len,
".%llu", ino);
name_len += count_digits(ino) + 1;
ret = btrfs_add_link(trans, root, ino, lost_found_ino, namebuf,
name_len, filetype, NULL, 1, 0);
}
if (ret < 0) {
error("failed to link the inode %llu to %s dir: %s",
ino, dir_name, strerror(-ret));
goto out;
}
++*ref_count;
printf("Moving file '%.*s' to '%s' dir since it has no valid backref\n",
name_len, namebuf, dir_name);
out:
btrfs_release_path(path);
if (ret)
error("failed to move file '%.*s' to '%s' dir", name_len,
namebuf, dir_name);
return ret;
}

5
check/common.h
View File

@ -85,5 +85,10 @@ int count_csum_range(struct btrfs_fs_info *fs_info, u64 start,
int insert_inode_item(struct btrfs_trans_handle *trans, int insert_inode_item(struct btrfs_trans_handle *trans,
struct btrfs_root *root, u64 ino, u64 size, struct btrfs_root *root, u64 ino, u64 size,
u64 nbytes, u64 nlink, u32 mode); u64 nbytes, u64 nlink, u32 mode);
int link_inode_to_lostfound(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path,
u64 ino, char *namebuf, u32 name_len,
u8 filetype, u64 *ref_count);
#endif #endif

92
check/main.c
View File

@ -2960,98 +2960,6 @@ out:
return ret; return ret;
} }
static int get_highest_inode(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path,
u64 *highest_ino)
{
struct btrfs_key key, found_key;
int ret;
btrfs_init_path(path);
key.objectid = BTRFS_LAST_FREE_OBJECTID;
key.offset = -1;
key.type = BTRFS_INODE_ITEM_KEY;
ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
if (ret == 1) {
btrfs_item_key_to_cpu(path->nodes[0], &found_key,
path->slots[0] - 1);
*highest_ino = found_key.objectid;
ret = 0;
}
if (*highest_ino >= BTRFS_LAST_FREE_OBJECTID)
ret = -EOVERFLOW;
btrfs_release_path(path);
return ret;
}
/*
* Link inode to dir 'lost+found'. Increase @ref_count.
*
* Returns 0 means success.
* Returns <0 means failure.
*/
static int link_inode_to_lostfound(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path,
u64 ino, char *namebuf, u32 name_len,
u8 filetype, u64 *ref_count)
{
char *dir_name = "lost+found";
u64 lost_found_ino;
int ret;
u32 mode = 0700;
btrfs_release_path(path);
ret = get_highest_inode(trans, root, path, &lost_found_ino);
if (ret < 0)
goto out;
lost_found_ino++;
ret = btrfs_mkdir(trans, root, dir_name, strlen(dir_name),
BTRFS_FIRST_FREE_OBJECTID, &lost_found_ino,
mode);
if (ret < 0) {
error("failed to create '%s' dir: %s", dir_name, strerror(-ret));
goto out;
}
ret = btrfs_add_link(trans, root, ino, lost_found_ino,
namebuf, name_len, filetype, NULL, 1, 0);
/*
* Add ".INO" suffix several times to handle case where
* "FILENAME.INO" is already taken by another file.
*/
while (ret == -EEXIST) {
/*
* Conflicting file name, add ".INO" as suffix * +1 for '.'
*/
if (name_len + count_digits(ino) + 1 > BTRFS_NAME_LEN) {
ret = -EFBIG;
goto out;
}
snprintf(namebuf + name_len, BTRFS_NAME_LEN - name_len,
".%llu", ino);
name_len += count_digits(ino) + 1;
ret = btrfs_add_link(trans, root, ino, lost_found_ino, namebuf,
name_len, filetype, NULL, 1, 0);
}
if (ret < 0) {
error("failed to link the inode %llu to %s dir: %s",
ino, dir_name, strerror(-ret));
goto out;
}
++*ref_count;
printf("Moving file '%.*s' to '%s' dir since it has no valid backref\n",
name_len, namebuf, dir_name);
out:
btrfs_release_path(path);
if (ret)
error("failed to move file '%.*s' to '%s' dir", name_len,
namebuf, dir_name);
return ret;
}
static int repair_inode_nlinks(struct btrfs_trans_handle *trans, static int repair_inode_nlinks(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct btrfs_root *root,
struct btrfs_path *path, struct btrfs_path *path,