In case defrag fails, the errno is not properly reported everywhere but
rather the last value of 'e', which could be 0. Then we get confusing
error messages like:
ERROR: defrag failed on /path/to/file: Success
Reported-by: Adam Mizerski <adam@mizerski.pl>
Signed-off-by: David Sterba <dsterba@suse.com>
* Before this patch
===============================
# ./btrfs fi show foo # "foo" doesn't mean any valid Btrfs
# # no error message
# echo $?
1
===============================
* After this patch
===============================
# ./btrfs fi show foo
ERROR: foo is not a valid Btrfs
#
# echo $?
1
===============================
Signed-off-by: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
The cleanup of option parsing caused a regression where the negative
resize argument is recognized as short options and the command fails.
Use the new helper to allow that.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=119971
Signed-off-by: David Sterba <dsterba@suse.com>
is_seen_fsid() uses simple hash to check if FS was seen before at
walking on FS list in 'filesystem show' command: hash key is first byte
of the UUID. This function doesn't check full UUID then, so, if there
are two FS with same first byte in UUIDs exist, only one will be shown:
root@test:~# btrfs fi show
Label: 'System' uuid: 688cb918-7bac-4c8e-9b11-8d047eb14cf4
Total devices 2 FS bytes used 1.76GiB
devid 1 size 3.46TiB used 4.01GiB path /dev/sda2
devid 2 size 6.91TiB used 4.01GiB path /dev/sdb2
Global spare
root@test:~# grep btrfs /proc/mounts
/dev/sda2 / btrfs rw,relatime,space_cache,subvolid=256,subvol=/root 0 0
/dev/sdc /media/688cb918-7bac-4c8e-9b11-8d047eb14cf4 btrfs rw,relatime,space_cache,subvolid=5,subvol=/ 0 0
root@test:~# btrfs fi show --all-devices
Label: 'System' uuid: 688cb918-7bac-4c8e-9b11-8d047eb14cf4
Total devices 2 FS bytes used 1.76GiB
devid 1 size 3.46TiB used 4.03GiB path /dev/sda2
devid 2 size 6.91TiB used 4.01GiB path /dev/sdb2
Label: 'test' uuid: 683b1a80-ca7f-4c4d-b87b-7155401a4d18
Total devices 7 FS bytes used 2.06MiB
devid 1 size 7.28TiB used 1.57GiB path /dev/sdc
devid 2 size 7.28TiB used 1.57GiB path /dev/sdd
devid 3 size 7.28TiB used 1.57GiB path /dev/sde
devid 4 size 7.28TiB used 1.57GiB path /dev/sdf
devid 5 size 7.28TiB used 1.57GiB path /dev/sdg
devid 6 size 7.28TiB used 1.57GiB path /dev/sdh
devid 7 size 7.28TiB used 1.57GiB path /dev/sdi
To resolve this collision, search for full FSID in the list of seen
filesystems.
Signed-off-by: Yauhen Kharuzhy <yauhen.kharuzhy@zavadatar.com>
Signed-off-by: David Sterba <dsterba@suse.com>
The number of arguments which is allowed to pass became wrong
from the following commit.
commit 176aeca9a148c5e29de0 ("btrfs-progs: add getopt stubs where needed")
* actual result
===========================================================
# ./btrfs prop get /btrfs label
label=foo
# ./btrfs fi label /btrfs
btrfs filesystem label: too few arguments
usage: btrfs filesystem label [<device>|<mount_point>] [<newlabel>]
Get or change the label of a filesystem
With one argument, get the label of filesystem on <device>.
If <newlabel> is passed, set the filesystem label to <newlabel>.
# ./btrfs fi label /btrfs bar
foo
# ./btrfs prop get /btrfs label
label=foo
===========================================================
* expected result
===========================================================
# ./btrfs prop get /btrfs label
label=foo
# ./btrfs fi label /btrfs
foo
# ./btrfs fi label /btrfs bar
# ./btrfs prop get /btrfs label
label=bar
===========================================================
Signed-off-by: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Add new btrfsck option, '--chunk-root', to specify chunk root bytenr.
And allow open_ctree_fs_info() function accept chunk_root_bytenr to
override the bytenr in superblock. This will be mainly used when chunk
tree corruption.
Signed-off-by: Lu Fengqi <lufq.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Commands that do not take any options do not use getopt, which means the
standard option separator "--" does not work. Update all command
handlers that need it, argv needs to be referenced using the optind that
is correctly pointed after the separator.
Signed-off-by: David Sterba <dsterba@suse.com>
'btrfs du' differs from regular du in that it will work to resolve which
blocks are shared between files in its list. This gives the user a more
accurate bytecount from which they can make decisions regarding management
of their file space.
We still print a total number of bytes counted (like regular du), but also
print the number of bytes which were found to have been shared amongst the
file set provided. From there it becomes trivial to calculate how much space
is exclusively owned.
Signed-off-by: Mark Fasheh <mfasheh@suse.de>
[ rename files to reflect the filesystem command group, add GPL v2
file headers ]
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>
Noticed that at print_one_uuid() some of the members of btrfs_fs_devices
contained some junk values. It took a while to dig this further, and found
that we make a local copy of the btrfs_fs_devices list at
search_umounted_fs_uuids() and wasn't initialized properly.
Fixed using using calloc instead of malloc.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
[ switched to calloc ]
Signed-off-by: David Sterba <dsterba@suse.com>
We can use btrfs_open_dir() to check whether target dir is
in btrfs's mount point before open, instead of checking it in
kernel space of ioctl, and return fuzzy error message.
Before patch:
# (/mnt/tmp is not btrfs mountpoint)
#
# btrfs filesystem df /mnt/tmp
ERROR: couldn't get space info - Inappropriate ioctl for device
ERROR: get_df failed Inappropriate ioctl for device
#
After patch:
# ./btrfs filesystem df /mnt/tmp
ERROR: not btrfs filesystem: /mnt/tmp
#
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
fsid can be mounted multiple times, with different subvolid.
And we don't have to scan a mount point if we already have
that in the scanned list.
And thus nicely avoids the following warning with multiple
subvol mounts on older kernel like 2.6.32 where
BTRFS_IOC_GET_FSLABEL ioctl does not exist.
./btrfs fi show -m
Label: none uuid: 31845933-611e-422d-ae6f-386e57ad81aa
Total devices 2 FS bytes used 172.00KiB
devid 1 size 3.00GiB used 642.38MiB path /dev/sdd
devid 2 size 3.00GiB used 622.38MiB path /dev/sde
warning, device 2 is missing
warning devid 2 not found already
warning, device 2 is missing
warning devid 2 not found already
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
If there are different devices mounted to the same directory we can run
into double free issue in the scanning code and this can lead to a
crash. The dev_info_arg buffer allocation get_fs_info might be skipped,
eg. if the FS_INFO ioctl fails due to EPERM in older kernels. Reset the
pointer before each loop starts.
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>
Move to use get_unit_mode_from_arg() for cmds-filesystem.c,
to make "btrfs filesystem df/show/usage"'s unit argument same.
Also have cleanup effect: 19 insertions(+), 181 deletions(-)
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
btrfs progs output following error message when doing resize on
no-enouth-free-space case:
# btrfs filesystem resize +10g /mnt/btrfs_5gb
Resize '/mnt/btrfs_5gb' of '+10g'
ERROR: unable to resize '/mnt/btrfs_5gb' - File too large
#
It is not a good description for users, and this patch changed it to:
# ./btrfs filesystem resize +10G /mnt/tmp1
Resize '/mnt/tmp1' of '+10G'
ERROR: unable to resize '/mnt/tmp1' - no enouth free space
#
Reported-by: Taeha Kim <kthguru@gmail.com>
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
A leftover from when recursive defrag was added.
Signed-off-by: Patrik Lundquist <patrik.lundquist@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Commit dedb1ebeee broke commit
96cfbbf0ea.
Casting thresh value greater than (u32)-1 simply truncates bits while
desired value is (u32)-1 for max defrag threshold.
I.e. "btrfs fi defrag -t 4g" is trimmed/truncated to 0
and "-t 5g" to 1073741824.
Also added a missing newline.
Signed-off-by: Patrik Lundquist <patrik.lundquist@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Currently there is not way for a user to know what is the minimum size a
device of a btrfs filesystem can be resized to. Sometimes the value of
total allocated space (sum of all allocated chunks/device extents), which
can be parsed from 'btrfs filesystem show' and 'btrfs filesystem usage',
works as the minimum size, but sometimes it does not, namely when device
extents have to relocated to holes (unallocated space) within the new
size of the device (the total allocated space sum).
This change adds the ability to reliably compute such minimum value and
extents 'btrfs filesystem resize' with the following syntax to get such
value:
btrfs filesystem resize [devid:]get_min_size
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
We're also going to want to support aliases, so rather than adding
another member, replace "hidden" with a "flags" member.
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
btrfs fi defrag -t 1T overflows the u32 thresh variable and default,
instead of max, threshold is used.
Signed-off-by: Patrik Lundquist <patrik.lundquist@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Now "filesystem show" command can handle different units now.
This is handy for higher level programs to get accurate output from "fi
show" command.
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.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 path bufferes should be PATH_MAX but BTRFS_PATH_NAME_MAX is shorter
due to embedding in 4k aligned structures.
The only reason to use BTRFS_PATH_NAME_MAX is for the respective
structures btrfs_ioctl_vol_args::name.
Signed-off-by: David Sterba <dsterba@suse.cz>
The BTRFS_IOC_RESIZE ioctl returns 0 on success, negative for POSIX
errors, and positive for btrfs-specific errors.
If resize fails with a btrfs-specific error, decode the error and
report it. If we can't decode the error, report its numeric value so
that the userspace tool is not instantly useless when a new error code
is defined in the kernel.
Exit with non-zero status on any resize error. This is very important
for scripts that will shrink the underlying storage when btrfs reports
success!
Signed-off-by: Zygo Blaxell <ce3g8jdj@umail.furryterror.org
Signed-off-by: David Sterba <dsterba@suse.cz>
Resize of a filesystem image does not work as expected. This has been
confusing and can have bad consequences as people have reported,
resizing the wrong filesystem.
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>
- use standard PACKAGE_{NAME,VERSION,STRING,URL,...} autoconf macros
rather than homemade BTRFS_BUILD_VERSION
- don't #include version.h, now the file is necessary for library API only
Note that "btrfs version" returns "btrfs-progs <version>" instead of
the original confusing "btrfs <version>".
Signed-off-by: Karel Zak <kzak@redhat.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
glibc 2.10+ (5+ years old) enables all the desired features:
_XOPEN_SOURCE 700, __XOPEN2K8, POSIX_C_SOURCE, DEFAULT_SOURCE; with a
single _GNU_SOURCE define in the makefile alone. For portability to
other libc implementations (e.g. dietlibc) _XOPEN_SOURCE=700 is also
defined.
This also resolves Debian bug report filed by Michael Tautschnig -
"Inconsistent use of _XOPEN_SOURCE results in conflicting
declarations". Whilst I was not able to reproduce the results, the
reported fact is that _XOPEN_SOURCE set to 500 in one set of files
(e.g. cmds-filesystem.c) generates/defines different struct stat from
other files (cmds-replace.c).
This patch thus cleans up all feature defines, and sets them at a
consistent level.
Bug-Debian: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=747969
Signed-off-by: Dimitri John Ledkov <dimitri.j.ledkov@intel.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
