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If we point btrfs-show-super at a not-btrfs-device and
try to print all superblocks, bad things are apt to happen:
superblock: bytenr=274877906944, device=/dev/sdc2
---------------------------------------------------------
btrfs-show-super: ctree.h:1984: btrfs_super_csum_size: \
Assertion `!(t >= (sizeof(btrfs_csum_sizes) / sizeof((btrfs_csum_sizes)[0])))' failed.
csum 0xAborted
Don't try to print superblocks that don't look like superblocks,
and add an "-f" (force) option to try anyway, if the user
really wants to give it a shot.
Fix some spelling & capitalization while we're at it.
The manpage says that if any problem happens, 1 will
be returned, but that's already not true today LOL, so
I didn't bother to make it true when we detect bad
sb magic, either...
I figure it's worth continuing and trying all superblocks
in case just one has a corrupt magic.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
[renamed -f to -F due to clash with existing option, converted
relevant docs to asciidoc]
Signed-off-by: David Sterba <dsterba@suse.cz>
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Add sys chunk array and backup roots info if the new option '-f'
if specified.
This may be useful for debugging sys_chunk related issues.
Signed-off-by: Gui Hecheng <guihc.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
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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>
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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>
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sparse hates variable length array definitions on the stack:
btrfs-show-super.c:155:21: warning: Variable length array is used.
And it's right to. They're a fragile construct that doesn't handle bad
input well at all.
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>
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Some codes still use the cpu_to_lexx instead of the
BTRFS_SETGET_STACK_FUNCS declared in ctree.h.
Also added some BTRFS_SETGET_STACK_FUNCS for btrfs_header and
btrfs_super.
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>
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Signed-off-by: Stefan Behrens <sbehrens@giantdisaster.de>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
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In the error case where fd < 0, close(fd) is the wrong
thing to do.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
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The super block magic is a le64 whose value looks like an unterminated
string in memory. The lack of null termination leads to clumsy use of
string functions and causes static analysis tools to warn that the
string will be unterminated.
So let's just treat it as the le64 that it is. Endian wrappers are used
on the constant so that they're compiled into run-time constants.
Signed-off-by: Zach Brown <zab@redhat.com>
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Just a small program to print the fields of a super block.
Signed-off-by: Stefan Behrens <sbehrens@giantdisaster.de>
Signed-off-by: Goffredo Baroncelli <kreijack@inwind.it>
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