To accept DUP on multidev fs, in addition to the following
commit, we need to mark DUP as an allowed data/metadata
profile.
commit 42f1279bf8e9 ("btrfs-progs: mkfs: allow DUP on multidev fs, only warn")
* actual result
=============================================
# ./mkfs.btrfs -f -m DUP -d DUP /dev/sdb1 /dev/sdb2
btrfs-progs v4.5-24-ga35b7e6
See http://btrfs.wiki.kernel.org for more information.
WARNING: DUP is not recommended on filesystem with multiple devices
ERROR: unable to create FS with metadata profile DUP (have 2 devices but 1 devices are required)
=============================================
* expected result
=============================================
# ./mkfs.btrfs -f -m dup -d dup /dev/sdb1 /dev/sdb2
WARNING: DUP is not recommended on filesystem with multiple devices
btrfs-progs v4.5-25-g1a10a3c
See http://btrfs.wiki.kernel.org for more information.
Label: (null)
UUID: 010d72ff-c87c-4516-8916-5e635719d110
Node size: 16384
Sector size: 4096
Filesystem size: 28.87GiB
Block group profiles:
Data: DUP 1.01GiB
Metadata: DUP 1.01GiB
System: DUP 12.00MiB
SSD detected: no
Incompat features: extref, skinny-metadata
Number of devices: 2
Devices:
ID SIZE PATH
1 953.00MiB /dev/sdb1
2 27.94GiB /dev/sdb2
==================================================
Signed-off-by: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
There's a mix of opencoded strncpy + null termination, strncpy, memcppy
without termination etc. Unify them and use the helper.
Resolves-coverity-id: 1357105
Signed-off-by: David Sterba <dsterba@suse.com>
The DUP profile can work on multiple filesystems, the limitation is
rather artificial. Let the user make the decision and print a warning.
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Anand Jain <anand.jain@oracle.com>
[ renamed from subvol_minus_mnt to subvol_strip_mountpoint ]
Signed-off-by: David Sterba <dsterba@suse.com>
get_subvol_info() is useful as we are adding more features around
subvolume. This function was inline with the function
cmd_subvol_show().
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
The function test_issubvolume() provides the same check, and
has better logic.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
When `btrfs filesystem label /foo bar` command is invoked, it will pass
the buffer allocated in the argv array directly to set_label_mounted()
and then to the BTRFS_IOC_SET_FSLABEL ioctl.
However, the kernel code handling the ioctl will always try to copy
BTRFS_LABEL_SIZE bytes[1] from the userland pointer. Under certain
conditions and when the label is small enough, the command will fail
with:
[root@localhost /]# btrfs filesystem label /mnt f
ERROR: unable to set label Bad address
Fix this by making sure we pass a BTRFS_LABEL_SIZE sized buffer to the
ioctl containing the desired label.
[1] https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/fs/btrfs/ioctl.c?id=refs/tags/v4.5#n5231
Signed-off-by: Petros Angelatos <petrosagg@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
When 'btrfs device scan' command is invoked, it scans all devices,
check them for btrfs superblock and add devices with btrfs to a list.
Next, each device from the list is passed to kernel where it is handled
in the btrfs_scan_one_device() function. This function can, for example,
return -EBUSY when device contains superblock matched to existing and
mounted filesystem (if this device was pulled out from RAID and
connected again after some time).
btrfs tool stops device scan if any device has been failed to add, so
other existing devices with (possibly) valid FS will never be reached.
Fix this by remove stopping at any failure in the btrfs_register_all_devices(),
just return error count. btrfs_scan_one_device() reports any kind of
error already.
Signed-off-by: Yauhen Kharuzhy <yauhen.kharuzhy@zavadatar.com>
[ initialize err to 0 ]
Signed-off-by: David Sterba <dsterba@suse.com>
If parameter for pretty_size is smaller than default base(1024),
pretty_size() will output wrong unit.
For example, pretty_size(1008) will output '0.98B' not '1008B' or
'0.98KiB'.
The cause is, for default base and auto-detect unit, base will be 1024
but num_divs is still 0, last result will still be divided by base,
causing the bug.
Fix it by checking num_divs in default case, and if num_divs is 0,
change base to 1.
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Although BTRFS_ARG_BLKDEV can be returned from check_arg_type(),
it's not explained the meaning.
Signed-off-by: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
All commands should support the "--" option separator. This is
transparently handled by getopt, but we don't use that everywhere.
Introduce a helper for commands that take no options (just the path).
The object file dependencies need to be adjusted a bit.
Signed-off-by: David Sterba <dsterba@suse.com>
Handle only negative values returned by ioctl syscalls, with exception
of the device remove. It returns positive values that are handled later.
Signed-off-by: David Sterba <dsterba@suse.com>
Fix the code assigning 0 to pointer instead of NULL.
Signed-off-by: Byongho Lee <bhlee.kernel@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
If sectorsize is not BTRFS_SUPER_INFO_SIZE (4k), the superblock checksum
is wrong and mkfs fails. This has been reported on ppc64 where we pick
sectorisize from page size (64k). This has been broken since ages
(2008) and discovered by the recently added superblock checks.
Reported-by: Dinar Valeev <dvaleev@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
The loop_info64::lo_file_name might not be null terminated. Avoid strlen
and trim the length to whatever size of the loop_info buffer.
Signed-off-by: David Sterba <dsterba@suse.com>
When using partitions on a loop device, the device's name can be
e.g. /dev/loop0p1 or similar, and no relevant entry exists in the /sys
filesystem, so the current resolve_loop_device function fails.
Instead of using string functions to extract the device name and reading
this file, this patch uses the loop device API through ioctl to get the
correct backing file.
Signed-off-by: Florian Margaine <florian@platform.sh>
[ changed checks of error values from open and ioctl ]
Signed-off-by: David Sterba <dsterba@suse.com>
When do following command in a vm, whose disks are created by
qemu-img create -f raw 11 2.6G:
# mkfs.btrfs -f /dev/vdd /dev/vde /dev/vdf
# btrfs-show-super /dev/vdd /dev/vde /dev/vdf | grep dev_item.total_bytes
dev_item.total_bytes 2791727104
dev_item.total_bytes 2791729152
dev_item.total_bytes 2791729152
We can see that the first device's size is little smaller.
And it fails xfstests btrfs/011.
Reason:
First device's size is rounded down to sectorsize in make_btrfs(),
but other devices are not.
Fix:
Round down remain devices' size in btrfs_add_to_fsid().
Reported-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
There are two total_bytes in btrfs_add_to_fsid(), local variable
of total_bytes means fs_total_bytes, and device->total_bytes means
device's total_bytes.
And device's total_bytes in argument is named block_count in current
code.
This patch rename:
total_bytes -> fs_total_bytes
block_count -> device_total_bytes
To make code more readable.
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
When creating small Btrfs filesystem instances (i.e. filesystem size <= 1GiB),
mkfs.btrfs fails if both sectorsize and nodesize are specified on the command
line and sectorsize != nodesize, since mixed block groups involves both data
and metadata blocks sharing the same block group. This is an incorrect behavior
when '-M' option isn't specified on the command line.
This commit makes optional the creation of mixed block groups i.e. Mixed block
groups are created only when -M option is specified on the command line.
Since we now allow small filesystem instances with sectorsize != nodesize to
be created, we can end up in the following situation,
[root@localhost ~]# mkfs.btrfs -f -n 65536 /dev/loop0
btrfs-progs v3.19-rc2-405-g976307c
See http://btrfs.wiki.kernel.org for more information.
Performing full device TRIM (512.00MiB) ...
Label: (null)
UUID: 49fab72e-0c8b-466b-a3ca-d1bfe56475f0
Node size: 65536
Sector size: 4096
Filesystem size: 512.00MiB
Block group profiles:
Data: single 8.00MiB
Metadata: DUP 40.00MiB
System: DUP 12.00MiB
SSD detected: no
Incompat features: extref, skinny-metadata
Number of devices: 1
Devices:
ID SIZE PATH
1 512.00MiB /dev/loop0
[root@localhost ~]# mount /dev/loop0 /mnt/
mount: mount /dev/loop0 on /mnt failed: No space left on device
The ENOSPC occurs during the creation of the UUID tree. This is because of
things like large metadata block size, DUP mode used for metadata and global
reservation consuming space. Also, large nodesize does not make sense on small
filesystems, hence this should not be an issue.
Signed-off-by: Chandan Rajendra <chandan@linux.vnet.ibm.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Use btrfs_open_dir() in open_path_or_dev_mnt() to make the function
return error when target is neither block device nor btrfs mount point.
Also add "verbose" argument to let function output common error
message instead of putting duplicated lines in caller.
Before patch:
# ./btrfs device stats /mnt/tmp1
ERROR: getting dev info for devstats failed: Inappropriate ioctl for device
# ./btrfs replace start /dev/vdd /dev/vde /mnt/tmp1
ERROR: ioctl(DEV_REPLACE_STATUS) failed on "/mnt/tmp1": Inappropriate ioctl for device
After patch:
# ./btrfs device stats /mnt/tmp1
ERROR: not a btrfs filesystem: /mnt/tmp1
# ./btrfs replace start /dev/vdd /dev/vde /mnt/tmp1
ERROR: not a btrfs filesystem: /mnt/tmp1
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
it was highlighted to me is_block_device(), returns
1 if the file is a block device,
< 0 in case of an error (eg: file not found)
0 otherwise
This patch makes proper return checks at all the places
where is_block_device() is used. Thanks to Goffredo.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Suggested-by: Goffredo Baroncelli <kreijack@inwind.it>
Signed-off-by: David Sterba <dsterba@suse.com>
Check nodesize against features, not only sectorsize.
In fact, one of the btrfs-convert and mkfs differs in the nodesize
check.
This patch also provides the basis for later btrfs-convert fix.
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Old kernels before 3.9 do not provide ioctl BTRFS_IOC_GET_FSLABEL.
So we need to provide a fail safe logic for btrfs-progs running
on those kernel.
In this patch when get_label_mounted() fails on the old kernel
it will fail back to the old method and uses get_label_unmounted(),
where it will read from the disk directly.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Sparse reports:
warning: non-ANSI function declaration of function
and we're using func(void) elsewhere.
Signed-off-by: David Sterba <dsterba@suse.com>
Failure during superblock wiping is not always a hard error as we're
going to overwrite it anyway but it may catch some errors earlier. The
error message is not very descriptive though, because we don't get back
much information from blkid.
Signed-off-by: David Sterba <dsterba@suse.com>
We are using separate code for parsing unit mode in current code,
better to use common function.
This patch introduces a common function to specify units as arguments
and a common help message, to make every tool in btrfs having same unit
argument.
The benefits are:
1: Unify current tool's arguments for unit
2: Make tools in future easy to implement such argument
3: Changes (enhancement) in common function have effect on all
relative tools
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
In btrfs_add_to_fsid(), strdup() allocates memory to device->name, but
the return value is not checked.
So add the return value check and error handling code.
And clean-up error handling code for ENOMEM case.
Signed-off-by: Byongho Lee <bhlee.kernel@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This patch introduce open_btrfs_dir() to open a dir in btrfs
filesystem.
It can be used for several tools in btrfs-progs.
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
[renamed from open_btrfs_dir, adjusted error messages]
Signed-off-by: David Sterba <dsterba@suse.com>
Satoru Takeuchi