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btrfs-util: make sure btrfs_subvol_get_info_fd() works on O_PATH fds

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This commit is contained in:
Lennart Poettering
2024-12-09 13:51:28 +01:00
parent e837c257d0
commit abeedbde90
1 changed files with 6 additions and 0 deletions
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6
src/shared/btrfs-util.c
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@@ -329,6 +329,12 @@ int btrfs_subvol_get_info_fd(int fd, uint64_t subvol_id, BtrfsSubvolInfo *ret) {
assert(fd >= 0);
assert(ret);
/* Make sure this works on O_PATH fds */
_cleanup_close_ int fd_close = -EBADF;
fd = fd_reopen_condition(fd, O_CLOEXEC|O_RDONLY|O_DIRECTORY, O_PATH, &fd_close);
if (fd < 0)
return fd;
if (subvol_id == 0) {
r = btrfs_subvol_get_id_fd(fd, &subvol_id);
if (r < 0)