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btrfs: fix loopback resizing code

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This corrects the block device to use, to the right path, as it was
before 553e15f21bd7b1ecb709edfb5686d5768fe942f2.

Replaces: #10153
This commit is contained in:
Lennart Poettering 2018-09-24 19:44:06 +02:00
parent 6c9c51e5e2
commit de89949a71
1 changed files with 3 additions and 3 deletions
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6
src/basic/btrfs-util.c
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@ -877,7 +877,7 @@ int btrfs_subvol_set_subtree_quota_limit(const char *path, uint64_t subvol_id, u
int btrfs_resize_loopback_fd(int fd, uint64_t new_size, bool grow_only) { int btrfs_resize_loopback_fd(int fd, uint64_t new_size, bool grow_only) {
struct btrfs_ioctl_vol_args args = {}; struct btrfs_ioctl_vol_args args = {};
char p[SYS_BLOCK_PATH_MAX("/loop/backing_file")]; char p[SYS_BLOCK_PATH_MAX("/loop/backing_file")], q[DEV_NUM_PATH_MAX];
_cleanup_free_ char *backing = NULL; _cleanup_free_ char *backing = NULL;
_cleanup_close_ int loop_fd = -1, backing_fd = -1; _cleanup_close_ int loop_fd = -1, backing_fd = -1;
struct stat st; struct stat st;
@ -922,8 +922,8 @@ int btrfs_resize_loopback_fd(int fd, uint64_t new_size, bool grow_only) {
if (grow_only && new_size < (uint64_t) st.st_size) if (grow_only && new_size < (uint64_t) st.st_size)
return -EINVAL; return -EINVAL;
xsprintf_sys_block_path(p, NULL, dev); xsprintf_dev_num_path(q, "block", dev);
loop_fd = open(p, O_RDWR|O_CLOEXEC|O_NOCTTY); loop_fd = open(q, O_RDWR|O_CLOEXEC|O_NOCTTY);
if (loop_fd < 0) if (loop_fd < 0)
return -errno; return -errno;