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>
1: Remove more_than_one variable, use iterators value instead
2: Remove "out" label, we use break instead.
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
[ changelog update ]
Signed-off-by: David Sterba <dsterba@suse.com>
Switch to common warning()/error() for cmds-device.c.
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
[ minor tweaks ]
Signed-off-by: David Sterba <dsterba@suse.com>
Device deletion procedures ensures the device is a block device.
This patch introduces 'missing' as keyword again, correctly
passing it on to the kernel instead of complaining about
'missing' not being a block device.
Signed-off-by: Alexander Fougner <fougner89@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Since we have btrfs_close_all_devices() in btrfs's main entrance,
it is not necessary to call btrfs_close_all_devices() separately
in each sub-command.
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>
This is needed by the patch which introduces new devid option for the
btrfs device delete.
Signed-off-by: Anand Jain <anand.jain@oracle.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>
Move to use get_unit_mode_from_arg() for cmds-device.c,
to make "btrfs device usage"'s unit argument same with other
tools.
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
We can use btrfs_open_dir() to check whether the target dir is
under btrfs mount point before openning, instead of checking it in kernel
through ioctl, and returning a fuzzy error message.
Before patch:
# (/mnt/tmp is not btrfs mountpoint)
#
# btrfs device add -f /dev/sda13 /mnt/tmp
ERROR: error adding the device '/dev/sda13' - Inappropriate ioctl for device
#
After patch:
# btrfs device add -f /dev/sda13 /mnt/tmp
ERROR: not btrfs filesystem: /mnt/tmp
#
Similar fix for device remove and device usage.
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
[renamed to btrfs_open_dir]
Signed-off-by: David Sterba <dsterba@suse.com>
mkfs creates more than one fs_devices in fs_uuids.
1: one is for file system being created
2: others are created in test_dev_for_mkfs in order to check mount point
test_dev_for_mkfs()-> ... -> btrfs_scan_one_device()
Current code only closes 1, and this patch also closes in case 2.
Similar problem exist in other tools, eg.::
cmd-check.c: the function is:
cmd_check()->check_mounted()-> ... -> btrfs_scan_one_device()
...
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
There's an awkward asymmetry between btrfs device add and btrfs device
delete. Resolve this by aliasing delete to remove.
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
At some places we do not clear the whole ioctl structure and could
pass garbage to kernel. Zero the ioctl vol_args and use a helper for
copying the path.
Signed-off-by: David Sterba <dsterba@suse.cz>
The error string buffer passed as an argument is of a fixed size, though
we could print up to PATH_MAX + something bytes. Print the error message
directly.
Signed-off-by: David Sterba <dsterba@suse.cz>
It's res instead of ret, wrong error message could be prointed in case
of error.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
my troubleshooting experience says have unique error string per module.
In the below eg, its one additional step to know error line,
cat -n cmds-device.c | egrep "error removing the device"
185 "ERROR: error removing the device '%s' - %s\n",
190 "ERROR: error removing the device '%s' - %s\n",
which is completely avoidable.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
[merged the two messages into one]
Signed-off-by: David Sterba <dsterba@suse.cz>
We're not using it anywhere. The best practice is to add enums with
values > 255 for the long options, option index counting is error prone.
Signed-off-by: David Sterba <dsterba@suse.cz>
Add an alias to -h to 'filesystem usage', 'filesystem df' and
'device usage' commands, same as the traditional 'df'.
Signed-off-by: David Sterba <dsterba@suse.cz>
The main point of this is to load the device and chunk infos at one
place and pass down to the printers. The EPERM is handled separately, in
case kernel does not give us all the information about chunks or
devices, but we want to warn and print at least something.
For non-root users, 'filesystem usage' prints only the overall stats and
warns about RAID5/6.
The sole cleanup changes affect mostly the modified code and the related
functions, should be reasonably small.
Signed-off-by: David Sterba <dsterba@suse.cz>
The device may not be fully occupied by the filesystem, the value of
Unallocated should not be calculated against the device size but the
size provided by DEV_INFO.
Signed-off-by: David Sterba <dsterba@suse.cz>
The entire device size may not be available to the filesystem, eg. if
it's modified via resize. Print this information if it can be obtained
from the DEV_INFO ioctl.
Print the device ID on the same line as the device name and move size to
the next line.
Sample:
/dev/sda7, ID: 3
Device size: 10.00GiB
FS occupied: 5.00GiB
Data,RAID10: 512.00MiB
Metadata,RAID10: 512.00MiB
System,RAID10: 4.00MiB
Unallocated: 9.00GiB
Signed-off-by: David Sterba <dsterba@suse.cz>
Move the command definitions where they belong, keep common 'usage'
functions in cmds-fi-disk_usage.c and add exports.
Rename structures containing 'disk' to 'device'.
Fix whitespace in the modified code.
Signed-off-by: David Sterba <dsterba@suse.cz>
When using lvm volumes to check fstests: btrfs/006, it fails like:
Label: 'TestLabel.006' uuid: <UUID>
Total devices <EXACTNUM> FS bytes used <SIZE>
devid <DEVID> size <SIZE> used <SIZE> path SCRATCH_DEV
+ devid <DEVID> size <SIZE> used <SIZE> path /dev/dm-4
+ devid <DEVID> size <SIZE> used <SIZE> path /dev/dm-5
+ devid <DEVID> size <SIZE> used <SIZE> path /dev/dm-6
The /dev/dm-* points to lvm volumes, use @canonicalize_path() to convert them
and we will make it through. Of course we should do the same thing for dev stat.
Signed-off-by: Gui Hecheng <guihc.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
btrfs_scan_lblikd() is called by most the device related command functions.
And btrfs_scan_lblkid() is most expensive function and it becomes more expensive
as number of devices in the system increase. Further some threads call this
function more than once for absolutely no extra benefit and the real waste of
resources. Below list of threads and number of times btrfs_scan_lblkid()
is called in that thread.
btrfs-find-root 1
btrfs rescue super-recover 2
btrfs-debug-tree 1
btrfs-image -r 2
btrfs check 2
btrfs restore 2
calc-size NC
btrfs-corrupt-block NC
btrfs-image NC
btrfs-map-logical 1
btrfs-select-super NC
btrfstune 2
btrfs-zero-log NC
tester NC
quick-test.c NC
btrfs-convert 0
mkfs #number of devices to be mkfs
btrfs label set unmounted 2
btrfs get label unmounted 2
This patch will:
move out calling register_one_device with in btrfs_scan_lblkid()
and so function setting the BTRFS_UPDATE_KERNEL to yes will
call btrfs_register_all_devices() separately.
introduce a global variable scan_done, which is set when scan is
done succssfully per thread. So that following calls to this function
will just return success.
Further if any function needs to force scan after scan_done is set,
then it can be done when there is such a requirement, but as of now there
isn't any such requirement.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
cmd_scan_dev() has it own code to register device (calling ioctl
BTRFS_IOC_SCAN_DEV), apparently it could use btrfs_register_one_device().
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
The libblkid scan method which was introduced later, will also
scan devices under /proc/partitions. So we don't have to do
the explicit scan of the same.
Remove the scan method BTRFS_SCAN_PROC.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
We can scan for btrfs devices in a few ways. By default
libblkid is used for "device scan" and "filesystem show";
with the -m option only mounted filesystems are scanned,
and with -d we physically read every system device.
But there's no reason for the complexity of a descent through
/dev; /proc/partitions has every device known to the kernel, so
just use that when -d is specified.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Fix (at least one user-visible) typos: it's its, not it's.
Signed-off-by: Holger Hoffstätte <holger.hoffstaette@googlemail.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
mount(8) will canonicalize pathnames before passing them to the kernel.
Links to e.g. /dev/sda will be resolved to /dev/sda. Links to /dev/dm-#
will be resolved using the name of the device mapper table to
/dev/mapper/<name>.
Btrfs will use whatever name the user passes to it, regardless of whether
it is canonical or not. That means that if a 'btrfs device ready' is
issued on any device node pointing to the original device, it will adopt
the new name instead of the name that was used during mount.
Mounting using /dev/sdb2 will result in df:
/dev/sdb2 209715200 39328 207577088 1% /mnt
lrwxrwxrwx 1 root root 4 Jun 4 13:36 /dev/whatever-i-like -> sdb2
/dev/whatever-i-like 209715200 39328 207577088 1% /mnt
Likewise, mounting with /dev/mapper/whatever and using /dev/dm-0 with a
btrfs device command results in df showing /dev/dm-0. This can happen with
multipath devices with friendly names enabled and doing something like
'partprobe' which (at least with our version) ends up issuing a 'change'
uevent on the sysfs node. That *always* uses the dm-# name, and we get
confused users.
This patch does the same canonicalization of the paths that mount does
so that we don't end up having inconsistent names reported by ->show_devices
later.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
[use PATH_MAX in canonicalize_dm_name]
Signed-off-by: David Sterba <dsterba@suse.cz>
open_path_or_dev_mnt() is used to on *mounted* btrfs device or mount
point, when a unmounted btrfs device is passed, errno is set to EINVAL to
info the caller.
If ignore the errno and just print "ERROR: can't access '%s'", end users
will get confused.
This patch will add check for open_path_or_dev_mnt() caller and print
more meaningful error message when a unmounted btrfs device path is
given.
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Help string of "btrfs dev scan" is inconsistent with man page,
which lacks the fact that -d|--all-device is conflict with <device>.
This patch fixes the description
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
1. Use long option to replace the original strcmp() to parse
the "--all-devices".
2. the "int ret" is defined in 2 places, just define it once
and make the return pattern into "goto + single return".
This does not change the actual scan procedure and return values.
Just make it clear, the original seems a little confusing.
Signed-off-by: Gui Hecheng <guihc.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
1. use usage() to replace the fprintf()
2. use check_argc_exact() to replace "argc != ..."
Signed-off-by: Gui Hecheng <guihc.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
David Sterba
Zhao Lei
Alexander Fougner
Chandan Rajendra
Anand Jain
Omar Sandoval
David Sterba
Goffredo Baroncelli
Gui Hecheng
Eric Sandeen
Holger Hoffstätte
Jeff Mahoney
Qu Wenruo