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btrfs-progs: libbtrfs: make own copy of lookup_path_rootid

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Remove dependency on utils.h and copy the simple lookup_path_rootid
helper.

Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2021-09-22 18:56:57 +02:00
parent d9009ed8ad
commit c774b45e22
3 changed files with 26 additions and 2 deletions
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1
libbtrfs/send-stream.c
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@ -20,7 +20,6 @@
#include "kernel-shared/send.h"
#include "libbtrfs/send-stream.h"
#include "crypto/crc32c.h"
#include "common/utils.h"
struct btrfs_send_stream {
char read_buf[BTRFS_SEND_BUF_SIZE];

2
libbtrfs/send-stream.h
View File

@ -34,6 +34,8 @@ extern "C" {
#include <btrfs/kerncompat.h>
#endif /* BTRFS_FLAT_INCLUDES */
#include <time.h>
struct btrfs_send_ops {
int (*subvol)(const char *path, const u8 *uuid, u64 ctransid,
void *user);

25
libbtrfs/send-utils.c
View File

@ -24,12 +24,35 @@
#include "kernel-shared/ctree.h"
#include "libbtrfs/send-utils.h"
#include "common/utils.h"
#include "ioctl.h"
#include "btrfs-list.h"
static int btrfs_subvolid_resolve_sub(int fd, char *path, size_t *path_len,
u64 subvol_id);
/*
* For a given:
* - file or directory return the containing tree root id
* - subvolume return its own tree id
* - BTRFS_EMPTY_SUBVOL_DIR_OBJECTID (directory with ino == 2) the result is
* undefined and function returns -1
*/
static int lookup_path_rootid(int fd, u64 *rootid)
{
struct btrfs_ioctl_ino_lookup_args args;
int ret;
memset(&args, 0, sizeof(args));
args.treeid = 0;
args.objectid = BTRFS_FIRST_FREE_OBJECTID;
ret = ioctl(fd, BTRFS_IOC_INO_LOOKUP, &args);
if (ret < 0)
return -errno;
*rootid = args.treeid;
return 0;
}
static int btrfs_get_root_id_by_sub_path(int mnt_fd, const char *sub_path,
u64 *root_id)