Hi, Felix,
On Sat, Jan 22, 2011 at 04:56:12PM +0100, Felix Blanke wrote:
> It was a simple:
>
> mkfs.btrfs -L backup -d single /dev/loop2
>
> But it also happens without the options, like:
>
> mkfs.btrfs /dev/loop2
>
>
> /dev/loop2 is a loop device, which is aes encrypted. The output of "losetup /dev/loop2":
>
> /dev/loop2: [0010]:5324
> (/dev/disk/by-id/ata-WDC_WD6400AAKS-22A7B2_WD-WCASY7780706-part3) encryption=AES128
>
>
> Thanks you for looking into this!
> While writing this I read your second mail. The strace output is attached.
OK, I've traced through the functions being called, and I really
can't see where it could be truncating the name, unless your system
has a stupidly small value of PATH_MAX.
Can you apply the following patch (to the "next" branch of the
btrfs-progs git repo), rebuild, and try again? It's just adding some
debugging output to track what it's looking at.
Hugo.
diff --git a/mkfs.c b/mkfs.c
index 2e99b95..51a5096 100644
--- a/mkfs.c
+++ b/mkfs.c
@@ -422,6 +422,7 @@ int main(int ac, char **av)
printf("WARNING! - see http://btrfs.wiki.kernel.org before using\n\n");
file = av[optind++];
+ printf("Checking whether %s is part of a mounted filesystem\n", file);
ret = check_mounted(file);
if (ret < 0) {
fprintf(stderr, "error checking %s mount status\n", file);
diff --git a/utils.c b/utils.c
index fd894f3..7fa3149 100644
--- a/utils.c
+++ b/utils.c
@@ -610,12 +610,16 @@ int resolve_loop_device(const char* loop_dev, char* loop_file, int max_len)
int ret_ioctl;
struct loop_info loopinfo;
+ printf("Resolving loop device %s (length %d)\n", loop_dev, max_len);
+
if ((loop_fd = open(loop_dev, O_RDONLY)) < 0)
return -errno;
ret_ioctl = ioctl(loop_fd, LOOP_GET_STATUS, &loopinfo);
close(loop_fd);
+ printf("Loop name = %s\n", loopinfo.lo_name);
+
if (ret_ioctl == 0)
strncpy(loop_file, loopinfo.lo_name, max_len);
else
@@ -639,6 +643,9 @@ int is_same_blk_file(const char* a, const char* b)
return -errno;
}
+ printf("Realpath of %s was %s\n", a, real_a);
+ printf("Realpath of %s was %s\n", b, real_b);
+
/* Identical path? */
if(strcmp(real_a, real_b) == 0)
return 1;
@@ -680,6 +687,9 @@ int is_same_loop_file(const char* a, const char* b)
const char* final_b;
int ret;
+ printf("is_same_loop_file: %s and %s\n", a, b);
+ printf("PATH_MAX = %d\n", PATH_MAX);
+
/* Resolve a if it is a loop device */
if((ret = is_loop_device(a)) < 0) {
return ret;
@@ -784,8 +794,10 @@ int check_mounted(const char* file)
if(strcmp(mnt->mnt_type, "btrfs") != 0)
continue;
+ printf("Testing if btrfs device is in the dev list: %s\n", mnt->mnt_fsname);
ret = blk_file_in_dev_list(fs_devices_mnt, mnt->mnt_fsname);
} else {
+ printf("Testing if non-btrfs device is block or regular: %s\n", mnt->mnt_fsname);
/* ignore entries in the mount table that are not
associated with a file*/
if((ret = is_existing_blk_or_reg_file(mnt->mnt_fsname)) < 0)
diff --git a/volumes.c b/volumes.c
index 7671855..2496fbd 100644
--- a/volumes.c
+++ b/volumes.c
@@ -130,6 +130,8 @@ static int device_list_add(const char *path,
device->fs_devices = fs_devices;
}
+ printf("Device added with name %s\n", device->name);
+
if (found_transid > fs_devices->latest_trans) {
fs_devices->latest_devid = devid;
fs_devices->latest_trans = found_transid;
@@ -223,6 +225,7 @@ int btrfs_scan_one_device(int fd, const char *path,
*total_devs = btrfs_super_num_devices(disk_super);
uuid_unparse(disk_super->fsid, uuidbuf);
+ printf("Adding device %s to list\n", path);
ret = device_list_add(path, disk_super, devid, fs_devices_ret);
error_brelse:
--
=== Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk ===
PGP key: 515C238D from wwwkeys.eu.pgp.net or http://www.carfax.org.uk
--- Doughnut furs ache me, Omar Dorlin. ---
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