The command 'subvolume show' would return error code in case quotas are
not enabled or in any other error. In case they're not enabled, it's not
fatal, no-qgroup setups are quite common.
Signed-off-by: David Sterba <dsterba@suse.com>
Print qgroup information one row per value and don't print the
information at all if quotas are not enabled. Sample output:
subv1
Name: subv1
UUID: 58aa0df4-6bde-3e4e-b9f6-631d9c23578f
Parent UUID: -
Received UUID: -
Creation time: 2019-06-19 12:34:56 +0200
Subvolume ID: 258
Generation: 9
Gen at creation: 9
Parent ID: 5
Top level ID: 5
Flags: -
Snapshot(s):
Quota group: 0/258
Limit referenced: -
Limit exclusive: 1.00GiB
Usage referenced: 16.00KiB
Usage exclusive: 16.00KiB
Signed-off-by: David Sterba <dsterba@suse.com>
Most command groups just pass their own command group to
handle_command_group. We can remove the explicit definitions
of command group callbacks by passing the cmd_struct to
handle_command_group and allowing it to resolve the group from it.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Now that every call site has a cmd_struct, we can just pass the cmd_struct
to usage to print the usager information. This allows us to interpret
the format flags we'll add later in this series to inform the user of
which output formats any given command supports.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Now that we have a cmd_struct everywhere, we can pass it to
clean_args_no_options and have it resolve the usage string from
it there. This is necessary for it to pass the cmd_struct to
usage() in the next patch.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This patch passes the cmd_struct to the command callback function. This
has several purposes: It allows the command callback to identify which
command was used to call it. It also gives us direct access to the
usage associated with that command.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Rather than having global command usage and callbacks used to create
cmd_structs in the command array, establish the cmd_struct structures
separately and use those. The next commit in the series passes the
cmd_struct to the command callbacks such that we can access flags
and determine which of several potential command we were called as.
This establishes several macros to more easily define the commands
within each command's source.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This patch reports on the first-level qgroup, if any, associated with
a particular subvolume. It displays the usage and limit, subject
to the usual unit parameters.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
The error message about the unsatisfied argument count is scrolled away
by the full usage string dump. This is not considered a good usability
practice.
This commit switches all direct usage -> return patterns, where the
argument check has no other constraint, eg. dependency on an option.
Signed-off-by: David Sterba <dsterba@suse.com>
Update handling of unknown option in all commands. This will not print
only the unknown option and short pointer to help. Dumping the whole
help was a bad idea that stuck for too long.
Signed-off-by: David Sterba <dsterba@suse.com>
There's a suggestion in #158 to improve the documenatation of the subvol
show command so it's more obvious what kind of information it provides.
I've updated the docs according to that and added an example that should
make the request for creation time at least greppable, the overall
description mentions 'times' so this should be enough as a pointer.
Pull-request: #158
Suggested-by: Robert Pollak <robert.pollak@posteo.net>
Signed-off-by: David Sterba <dsterba@suse.com>
Similar to the changes where strerror(errno) was converted, continue
with the remaining cases where the argument was stored in another
variable.
The savings in object size are about 4500 bytes:
$ size btrfs.old btrfs.new
text data bss dec hex filename
805055 24248 19748 849051 cf49b btrfs.old
804527 24248 19748 848523 cf28b btrfs.new
Signed-off-by: David Sterba <dsterba@suse.com>
Modify the file name length limit to meet the Linux naming convention.
In addition, the file name length is always bigger than 0, no need to
compare with 0 again.
Issue: #145
Signed-off-by: Su Yanjun <suyj.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
In function handle_global_options(), we reset @optind to 1.
However according to man page of getopt(3) NOTES section, if we need to
rescan options later, @optind should be reset to 0 to initialize the
internal variables correctly.
This explains the reason why in cmd_check(), getopt_long() doesn't
handle the following command correctly:
"btrfs check /dev/data/btrfs --check-data-csum"
While mkfs.btrfs handles mixed non-option and option correctly:
"mkfs.btrfs -f /dev/data/disk1 --data raid1 /dev/data/disk2"
Cc: Paul Jones <paul@pauljones.id.au>
Cc: Hugo Mills <hugo@carfax.org.uk>
Fixes: 010ceab56e ("btrfs-progs: rework option parser to use getopt for global options")
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This gets the remaining occurrences that weren't covered by previous
conversions.
Signed-off-by: Omar Sandoval <osandov@fb.com>
[ fixup test_issubvolume due to removed dependency patch ]
Signed-off-by: David Sterba <dsterba@suse.com>
Now implemented with btrfs_util_subvolume_path(),
btrfs_util_subvolume_info(), and subvolume iterators.
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Most of the interesting part of this command is the commit mode, so this
only saves a little bit of code.
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
The only thing of note here is the "top level" column. This used to mean
something else, but for a long time it has been equal to the parent ID.
I preserved this for backwards compatability.
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
As btrfs is specific to Linux, %m can be used instead of strerror(errno)
in format strings. This has some size reduction benefits for embedded
systems.
glibc, musl, and uclibc-ng all support %m as a modifier to printf.
A quick glance at the BIONIC libc source indicates that it has
support for %m as well. BSDs and Windows do not but I do believe
them to be beyond the scope of btrfs-progs.
Compiled sizes on Ubuntu 16.04:
Before:
3916512 btrfs
233688 libbtrfs.so.0.1
4899 bcp
2367672 btrfs-convert
2208488 btrfs-corrupt-block
13302 btrfs-debugfs
2152160 btrfs-debug-tree
2136024 btrfs-find-root
2287592 btrfs-image
2144600 btrfs-map-logical
2130760 btrfs-select-super
2152608 btrfstune
2131760 btrfs-zero-log
2277752 mkfs.btrfs
9166 show-blocks
After:
3908744 btrfs
233256 libbtrfs.so.0.1
4899 bcp
2366560 btrfs-convert
2207432 btrfs-corrupt-block
13302 btrfs-debugfs
2151104 btrfs-debug-tree
2134968 btrfs-find-root
2281864 btrfs-image
2143536 btrfs-map-logical
2129704 btrfs-select-super
2151552 btrfstune
2130696 btrfs-zero-log
2276272 mkfs.btrfs
9166 show-blocks
Total savings: 23928 (24 kilo)bytes
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This patch changes "subvol set-default" to also accept the subvolume path
for convenience.
If there are two args, they are assumed as subvol id and path to the fs
(the same as current behavior), and if there is only one arg, it is assumed
as the path to the subvolume.
subvol id is resolved by test_issubvolume() + lookup_path_rootid().
The empty subvol (ino == 2) will get error on test_issubvolume() which
checks whether inode num is 256 or not.
Issue: #35
Signed-off-by: Tomohiro Misono <misono.tomohiro@jp.fujitsu.com>
[ update documentation, use the new multi-line command scheme ]
Signed-off-by: David Sterba <dsterba@suse.com>
Fix 'subvolume delete --commit-after' to work properly:
- SYNC ioctl will be issued even when last delete fails
- SYNC ioctl will be issued on each file system only once in the end
To achieve this, get_fsid() and add_seen_fsid() are called after each
delete to keep only one fd for each fs.
In the end, seen_fsid_hash will be traversed and SYNC is issued on each
fs.
Signed-off-by: Tomohiro Misono <misono.tomohiro@jp.fujitsu.com>
Reviewed-by: Qu Wenruo <quwenruo.btrfs@gmx.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Current code is reversed in --commit-after and --commit-each operation,
i.e. --commit-after means --commit-each actually. This patch fixes this
and also introduces enum type for more readable code.
Signed-off-by: Tomohiro Misono <misono.tomohiro@jp.fujitsu.com>
Reviewed-by: Qu Wenruo <quwenruo.btrfs@gmx.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Unless the top level is mounted there is no way to know the
details of all the subvolume. For example:
mount -o subvol=sv1/newsv1 /dev/sdb /btrfs
btrfs su list /btrfs
ID 257 gen 12 top level 5 path sv1
ID 258 gen 9 top level 257 path sv1/snap
ID 259 gen 11 top level 257 path sv1/newsv1
You can't subvol show for sv1 and sv1/snap as its paths aren't
accessible to the user unless the its top level is mounted.
This patch adds two new options to the existing btrfs subvol show
cli. They are --rootid/-r or --uuid/-u, with this now the user will
be able to look for a subvolume using the rootid OR the uuid.
./btrfs su show -r 257 /btrfs
sv1
Name: sv1
UUID: 30129358-c69d-3e4a-a662-29509cc69c95
Parent UUID: -
Received UUID: -
Creation time: 2017-07-11 20:32:57 +0800
Subvolume ID: 257
Generation: 12
Gen at creation: 7
Parent ID: 5
Top level ID: 5
Flags: -
Snapshot(s):
sv1/snap
Signed-off-by: Anand Jain <anand.jain@oracle.com>
[ minor adjustments in the help text ]
Signed-off-by: David Sterba <dsterba@suse.com>
This is a kind of preparatory patch for the patch which will add
--rootid and --uuid options for the btrfs subvol show command.
As of now btrfs subvol show is using the external user provided subvol
path to show in the output. Which is kind of confusing.
btrfs su show /btrfs
/btrfs <--
Name: <FS_TREE>
It will be even more confusing when proposed --uuid or --rootid
options are used.
btrfs su show --rootid 258 /btrfs
/btrfs <--
Name: snap <--
UUID: 9630a45f-e647-4242-bd19-97590b4e20b2
Parent UUID: 30129358-c69d-3e4a-a662-29509cc69c95
Received UUID: -
Creation time: 2017-07-12 12:43:28 +0800
Subvolume ID: 258
Generation: 9
Gen at creation: 9
Parent ID: 257
Top level ID: 257
Flags: -
Snapshot(s):
Now with this patch, it will only show what is provided by the root_info.
btrfs su show --rootid 258 /btrfs
sv1/snap <--
Name: snap
UUID: 9630a45f-e647-4242-bd19-97590b4e20b2
Parent UUID: 30129358-c69d-3e4a-a662-29509cc69c95
Received UUID: -
Creation time: 2017-07-12 12:43:28 +0800
Subvolume ID: 258
Generation: 9
Gen at creation: 9
Parent ID: 257
Top level ID: 257
Flags: -
Snapshot(s):
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
The toplevel subvolume is special and the other listing code leaves it
out so we have to add several special cases to handle it. There's no
backreference so the path is built artificially. New helper
btrfs_get_toplevel_subvol is a reduced version of btrfs_get_subvol.
There's some information usually missing for the toplevel subvolume, eg.
the uuid or creation info. This has to be fixed on the mkfs side, the
other subvolumes are created by kernel.
Example:
/mnt
Name: <FS_TREE>
UUID: -
Parent UUID: -
Received UUID: -
Creation time: -
Subvolume ID: 5
Generation: 233
Gen at creation: 0
Parent ID: 0
Top level ID: 0
Flags: -
Snapshot(s):
subv1
Signed-off-by: David Sterba <dsterba@suse.com>
The utils helper is not verbose in case of an error, for now the helper
used for subvolume listing will print the error message but not
duplicate the ioctl anymore.
Signed-off-by: David Sterba <dsterba@suse.com>
The option 'v' was mistakenly added in
2ed161bd28 but there's no such option for
create at the moment, remove it.
Signed-off-by: David Sterba <dsterba@suse.com>
There was already the logic for verbose output, but the flag parsing did
not include it.
Signed-off-by: Vincent Batts <vbatts@hashbangbash.com>
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>
"sub get-default" does't work since the following commit.
commit 176aeca9a148 ("btrfs-progs: add getopt stubs where needed")
* actual result
==================================================
# ./btrfs sub get-default /btrfs
btrfs subvolume get-default: too few arguments
usage: btrfs subvolume get-default <path>
Get the default subvolume of a filesystem
==================================================
* expected result
==================================================
# btrfs sub get-default /btrfs
ID 5 (FS_TREE)
==================================================
Signed-off-by: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
The subvol sync command crashed randomly at the end with
*** glibc detected *** btrfs: double free or corruption (out): 0x00000000006ab040 ***
This is caused by running out of the ids array in case there are more
than 128 subvolumes. The array is increased in steps but does not
account the size of the item, so there was room for 1024 / 8 = 128
subvolume ids.
Fixes: c9f885ec89 ("btrfs-progs: subvol: let sync check only current deletions")
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>
A subvolume is a directory with inode number 256 on a btrfs filesytem.
Add the missing check to test_issubvolume for completeness, otherwise we
always do that in btrfs_open_dir.
Signed-off-by: David Sterba <dsterba@suse.com>
