Enhance leaf check to verify item ends that looks otherwise fine but
would exceed leaf. Same check is done in kernel.
Reported-by: Robert Marklund <robbelibobban@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
The optional argument to attribute 'deprecated' has been introduced in
gcc 4.5, and does not build on 4.4 which is still in use. The
recommended replacements are mentioned in the comment, not absolutely
necessary to repeat it via the attribute.
Reported-by: Amr El-Sharnoby <amr.elsharnoby@horizontechs.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
The original implementation doesn't output the nbytes for an inode.
Add the output and since the output is too long, reformat it to multi
lines.
This is very handy to debug related bugs.
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
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>
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>
uuid_unparse is supposed to take the ASCII representation of a UUID, so
we have to pass the raw fsid buffer.
Reported-by: Mike Fleetwood <mike.fleetwood@googlemail.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
The 'Current fsid:' value does not match the real fsid.
Reported-by: Mike Fleetwood <mike.fleetwood@googlemail.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
[BUG]
The original map-logical has the following problems:
1) Assert if we pass any tree root bytenr.
The problem is easy to trigger, here the number 29622272 is the bytenr of tree root:
# btrfs-map-logical -l 29622272 /dev/sda6
mirror 1 logical 29622272 physical 38010880 device /dev/sda6
mirror 2 logical 29622272 physical 1111752704 device /dev/sda6
extent_io.c:582: free_extent_buffer: Assertion `eb->refs < 0` failed.
btrfs-map-logical[0x41c464]
btrfs-map-logical(free_extent_buffer+0xc0)[0x41cf10]
btrfs-map-logical(btrfs_release_all_roots+0x59)[0x40e649]
btrfs-map-logical(close_ctree+0x1aa)[0x40f51a]
btrfs-map-logical(main+0x387)[0x4077c7]
/usr/lib/libc.so.6(__libc_start_main+0xf0)[0x7f80a5562790]
btrfs-map-logical(_start+0x29)[0x4078f9]
The problem is that, btrfs-map-logical always use sectorsize as default
block size to call alloc_extent_buffer.
And when it failes to find the block with the same size, it will free
the extent buffer in a incorrect method(Free and create a new one with
refs == 1).
2) Will return map result for non-exist extent.
# btrfs-map-logical -l 1 -b 123456 /dev/sda6
mirror 1 logical 1 physical 1 device /dev/sda6
mirror 1 logical 4097 physical 4097 device /dev/sda6
mirror 1 logical 8193 physical 8193 device /dev/sda6
...
Normally, before bytenr 12582912, there should be no extent as that's
the mkfs time temp metadata/system chunk.
But map-logical will still map them out.
Not to mention the 1 offset among all results.
[FIX]
This patch will rework the whole map logical by the following methods:
1) Always do things inside a extent
Even under the following case, map logical will only return covered
range in existing extents.
|<------ range given ------->|
|<-Extent A->| |<-Extent B->| |<---Extent C->|
Result:
|<-->| |<---------->| |<-->|
So with this patch, we will search extent tree to ensure all operation
are inside a extent before we do some stupid things.
2) No direct call on alloc_extent_buffer function.
That low-level function shouldn't be called at such high level.
It's only designed for low-level tree operation.
So in this patch we will only use safe high level functions avoid such
problem.
[RESULT]
With this patch, no assert will be triggered and better handle on
non-exist extents.
# btrfs-map-logical -l 29622272 /dev/sda6
mirror 1 logical 29622272 physical 38010880 device /dev/sda6
mirror 2 logical 29622272 physical 1111752704 device /dev/sda6
# btrfs-map-logical -l 1 -b 123456 /dev/sda6
No extent found at range [1,123457)
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
This function will write extent content info desired file.
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
The new function will print the mapping info of given range
[logical, logical+len).
Note, caller must ensure the ranges are completely inside an extent.
Or btrfs_map_block can return -ENOENT.
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Introduce the function to get accurate extent length based on extent
tree search.
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
The embedded 'path' is a pointera and we can't make it a path buffer due
to API constraints. Use a separate buffer and sto using the unsafe
path_cat interface.
Signed-off-by: David Sterba <dsterba@suse.cz>
Add versions of path_cat and path_cat3 that do not allocate the memory.
The unhandled memory allocations are still there.
Signed-off-by: David Sterba <dsterba@suse.cz>
Get rid of the allocation. The logic is changed so that a NULL
cur_subvol::path means that no subvolume/snapshot has been found so far.
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>
Kind of a big feature of btrfs is being able to have a default subvol. However
the receive code generates the paths to the subvols from the root of the fs,
even in the case of a default subvol. So instead figure out if we're inside of
a subvol, either because we have a different default or we've chroot'ed and are
using -m. Then strip this extra path off of the subvol we find so we can look
up our parent properly. Thanks
Reported-by: Neil Horman <nhorman@redhat.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Anand reports that the static buffers used for pertty size strings cause
a stack overflow on SPARC. Zach proposed to change the printf format to
wrap the number and the suffix into a macro. This would require to
change all callsites of pretty_size* and is not very convienient to
write.
This patch replaces the per-call-site static buffers with a limited
number for slots that would be used on each invokation of pretty_size
and wrap around. The number of array slots shall be 10 for now, in
current codebase there are no more than 2 calls to pretty_size in a
single argument list.
Reported-by: Anand Jain <Anand.Jain@oracle.com>
CC: Zach Brown <zab@zabbo.net>
Signed-off-by: David Sterba <dsterba@suse.cz>
