When we want to delete a subvol, we first check to see whether it is
a subvolume or not. After the check, we are sure that it is a valid
subvol, don't have to check its name.
Signed-off-by: Gui Hecheng <guihc.fnst@cn.fujitsu.com>
[removed unused variable 'len']
Signed-off-by: David Sterba <dsterba@suse.cz>
cmd_snapshot_usage in cmds-subvolume.c contains the short description
twice. Remove the first one.
Signed-off-by: Martin Volf <martin.volf.42@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
There are options to specify if the subvolume deletion should wait for
commit after each subvol or at the end. This is reported at the
beginning and considered as a noise. We'd like to report the mode for
each subvolume instead.
http://www.mail-archive.com/linux-btrfs%40vger.kernel.org/msg34617.html
Reported-by: Marc MERLIN <marc@merlins.org
Signed-off-by: David Sterba <dsterba@suse.cz>
If you exec:
# btrfs sub show <dir> <== non-subvolume dir
The cmd print error messages as expected, but returns 0.
By convetion, it should return non-zero and we should explicitly
set it before it goto out.
With other pieces adopted:
1) removed a unnecessary return value set -EINVAL
2) fixed another code branch which may return 0 upon error.
3) with 2) applied, the ret = 0 follows can be removed
Signed-off-by: Gui Hecheng <guihc.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Enhance the 'subvolume' subcommand to wait until a given list of
subvolumes or all currently scheduled for deletion are cleaned
completely from the filesystem.
Signed-off-by: David Sterba <dsterba@suse.cz>
When using send/receive, it it useful to be able to match up source
subvols on the send side (as, say, for -p or -c clone sources) with their
corresponding copies on the receive side. This patch adds a -R option to
btrfs sub list to show the received subvolume UUID on the receive side,
allowing the user to perform that matching correctly.
Signed-off-by: Hugo Mills <hugo@carfax.org.uk>
Signed-off-by: David Sterba <dsterba@suse.cz>
Since test_isdir() is a utility function, it's better to
move it to utils.c. In addition, "const char *" is
more appropriate type as its "path" argument because
this argument is not changed in this function.
Signed-off-by: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>
Cc: David Sterba <dsterba@suse.cz>
Cc: Mike Fleetwood <mike.fleetwood@googlemail.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
There are many duplicated codes to check if the given string is
correct subvolume name. Introduce test_issubvolname() for this
purpose for simplicity.
Signed-off-by: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>
Cc: David Sterba <dsterba@suse.cz>
Cc: Mike Fleetwood <mike.fleetwood@googlemail.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
When calling find_mount_root(), caller in fact wants to find the mount
point of *BTRFS*.
So also check ent->fstype in find_mount_root() and do special error
string output in caller.
This will suppress a lot of "Inapproiate ioctl for device" error
message.
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Switch to new helper arg_strtou64(), also check if user assign
a valid super copy.
Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
Steps to reproduce:
# mkfs.btrfs -f /dev/sda8
# mount /dev/sda8 /mnt
# btrfs sub create /mnt/a
# touch /mnt/b
# btrfs sub create /mnt/c
# btrfs sub delete /mnt/*
Above steps will trigger following abortion:
ERROR: 'b' is not a subvolume
*** Error in `btrfs': double free or corruption (out): 0x0000000002116060 ***
======= Backtrace: =========
/lib64/libc.so.6[0x3fa467cef8]
/lib64/libc.so.6(closedir+0xd)[0x3fa46b846d]
btrfs[0x43e608]
btrfs[0x40622f]
btrfs[0x403d19]
btrfs[0x4062c6]
btrfs[0x403f68]
We try to fix it by resetting @fd && @dirstream before trying next
subvolume deletion.
Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
Remove the extraneous `to' from `Can't access to X'.
Signed-off-by: Mitchel Humpherys <mitch.special@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
Subvolume deletion does not do a full transaction commit. This can lead
to an unexpected result when the system crashes between deletion and
commit, the subvolume directory will appear again. Add options to request
filesystem sync after each deleted subvolume or after the last one.
If the command with --commit option finishes succesfully, the
subvolume(s) deletion status is safely stored on the media.
Userspace approach is more flexible than in-kernel. Related discussions:
http://www.spinics.net/lists/linux-btrfs/msg22088.htmlhttp://www.spinics.net/lists/linux-btrfs/msg27240.html
CC: Alex Lyakas <alex.btrfs@zadarastorage.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
free(3) already checks the pointer for NULL, no need to do it
on your own. This patch make the change globally.
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>
we use 37 as the allocation size to hold the uuid_unparse, here
it defines BTRFS_UUID_UNPARSE_SIZE for the same.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
If we "goto again" in cmd_subvol_delete(), and error out to out:
before re-allocating the dupdname and dupvname pointers, we'll
double-free them.
Set them to NULL after freeing to avoid this.
Resolves-Coverity-CID: 1125944
Resolves-Coverity-CID: 1125945
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
cmd_subvol_get_default() returns 1 even if finds default subvolume
successfully.
Set the correct return value.
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
New option to subvolume list that acts as a global filter and applies
the other filters to either live subvolumes or the uncleaned ones.
The path to the deleted subvolumes is lost at the deletion time, sample
output looks like:
ID 259 gen 7 top level 0 path <FS_TREE>/DELETED
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
I hit a segfault when deleting a subvolume with very long name(>4096),
it's because cmd_subvol_delete() calls strdup() and passes NULL as
argument, which is returned by realpath(3).
I used the following script to reproduce
#!/bin/bash
mnt=$1
i=1
path=$mnt/subvol_$i
# Create very deep subvolumes
while btrfs sub create $path;do
((i++))
path="$path/subvol_$i"
done
last_vol=$(dirname $path)
dir=$(dirname $last_vol)
vol=$(basename $last_vol)
# Try to delete tha last one, this would get segfault
pushd $dir
btrfs sub delete $vol
popd
Fix it by checking return value of realpath(3), also fix the one in
find_mount_root().
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
The sync makes sure that 'very recently' introduced delayed work is
accounted for in the output of 'btrfs subvolume find-new' command.
Signed-off-by: chandan <chandan@linux.vnet.ibm.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
The strdup()s not freed are reported as memory leaks by valgrind.
Signed-off-by: Gui Hecheng <guihc.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
The patch also fixes some coding styles problems.
Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
These were mostly in option structs but there were a few gross string
pointer arguments given as 0.
Signed-off-by: Zach Brown <zab@redhat.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Update the usage strings of some cmds to keep the them consistent with
the source.
Also some minor changes are done to fit the man page syntax.
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
valgrind complains open_file_or_dir() causes a memory leak.That is because
if we open a directoy by opendir(), and then we should call closedir()
to free memory.
Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Listing subvolumes and getting default subvol in the filesystem don't need a
subv path,Any valid path related to Btrfs filesystem is ok to finish the work.
Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
localtime may return NULL (when an error is detected eg. after setting
tzname), followed by a segfault when the values is about to be used.
localtime_r works, does not set tzname and does not return NULL.
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
The operation related qgroup inherit may fails, if it fails, we should
free memory allocated,otherwise, memory leak happens.
Signed-off-by: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
See the warnings below:
[CC] btrfs-list.o
btrfs-list.c: In function 'filter_by_parent':
btrfs-list.c:1183:34: warning: cast to pointer from integer of different size
[-Wint-to-pointer-cast]
[CC] cmds-subvolume.o
cmds-subvolume.c: In function 'cmd_subvol_show':
cmds-subvolume.c:917:5: warning: cast from pointer to integer of different size
[-Wpointer-to-int-cast]
[CC] cmds-restore.o
cmds-restore.c: In function 'decompress_lzo':
cmds-restore.c:116:10: warning: passing argument 4 of 'lzo1x_decompress_safe'
from incompatible pointer type [enabled by default]
In file included from cmds-restore.c:31:0:
/usr/include/lzo/lzo1x.h:77:1: note: expected 'lzo_uint *' but argument is of
type 'size_t *'
Reported-by: Russell Coker <russell@coker.com.au>
Signed-off-by: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Extending usage messages with some info on the quota functionality:
- The -i option of "subvol create" and "subvol snapshot" was not
documented
- The -c option of "qgroup limit" is the default option
- The "qouta rescan" command is not yet implemented, while it should be
executed after enabling quota on a non-empty filesystem.
Signed-off-by: Koen De Wit <koen.de.wit@oracle.com>
cmd_subvol_create() currently returns without freeing resources
in almost every error case. Switch to a goto arrangement
so all cleanup can be done in one place.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
cmd_snapshot() currently returns without freeing resources
in almost every error case. Switch to a goto arrangement
so all cleanup can be done in one place.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Rearrange cmd_subvol_set_default() slightly so we
don't have to close the fd on an error return.
While we're at it, fix whitespace & remove magic
return values.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Without this we leak the fd when we return from the
function.
Also, remove the senseless random return values.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
btrfs_list_get_path_rootid() tries to return a negative
number on error, but it's a u64 function. Callers which test
for a return < 0 will never see an error.
Change the function to fill in the rootid via a pointer,
and then return a simple int as error.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
In the places where we copy a string into the name
member of btrfs_ioctl_vol_args or btrfs_ioctl_vol_args_v2,
we use strncopy (to not overflow the name array) and then
set the last position to the null character.
Howver, in both cases the arrays are defined with:
char name[MAX+1];
hence the last array position is name[MAX].
In most cases, we now insert the null at name[MAX-1]
which deprives us of one useful character.
Even the above isn't consistent through the code, so
make some helper code to make it simple, i.e.
strncpy_null(dest, src) which automatically does the
right thing based on the size of dest.
Thanks to Zach Brown for the macro suggestion.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
cmd_subvol_create() calls either BTRFS_IOC_SUBVOL_CREATE
or BTRFS_IOC_SUBVOL_CREATE_V2 depending on whether or
not inherit is set. However, these 2 ioctls have different
args structures with different length name[] members.
In the BTRFS_IOC_SUBVOL_CREATE case, the arg is
btrfs_ioctl_vol_args, with a BTRFS_PATH_NAME_MAX length
name, not a BTRFS_SUBVOL_NAME_MAX length name.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
unless it was intentional to include uuid when -s
option is (show snapshot only) given, we would need
this break statement.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
David Sterba
Gui Hecheng
Martin Volf
Hugo Mills
Satoru Takeuchi
Qu Wenruo
Wang Shilong
Mitchel Humpherys
Anand Jain
Eric Sandeen
Eryu Guan
chandan
Zach Brown
Wang Shilong
Koen De Wit