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Take into account that btrfs devices can be not contiguous

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This commit is contained in:
Andrea Mazzoleni 2026-05-20 19:16:14 +02:00
parent a2cec230e9
commit 9f89e22ce7
1 changed files with 13 additions and 1 deletions
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14
cmdline/unix.c
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@ -1175,6 +1175,8 @@ struct dev_struct {
#if HAVE_LINUX_DEVICE
static int devdereference_btrfs(uint64_t device, const char* dir, int fd, tommy_list* devlist)
{
int found = 0;
struct btrfs_ioctl_fs_info_args fs_info;
memset(&fs_info, 0, sizeof(fs_info));
if (ioctl(fd, BTRFS_IOC_FS_INFO, &fs_info) < 0) {
@ -1196,7 +1198,11 @@ static int devdereference_btrfs(uint64_t device, const char* dir, int fd, tommy_
if (ioctl(fd, BTRFS_IOC_DEV_INFO, &dev_info) != 0) {
/* LCOV_EXCL_START */
return -1;
/* btrfs device IDs (devid) are not guaranteed to be contiguous */
if (errno == ENODEV || errno == ENOENT)
continue; /* this is the expected error on missing id */
log_error(errno, "Ioctl BTRFS_IOC_DEV_INFO failed. %s.", strerror(errno));
continue;
/* LCOV_EXCL_STOP */
}
@ -1212,9 +1218,15 @@ static int devdereference_btrfs(uint64_t device, const char* dir, int fd, tommy_
dev->device = st.st_rdev;
tommy_list_insert_tail(devlist, &dev->node, dev);
++found;
log_tag("dereference:btrfs:%s:%u:%u:%u:%u\n", dir, major(device), minor(device), major(dev->device), minor(dev->device));
}
/* something has to be found */
if (found == 0)
return -1;
return 0;
}