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* btrfs-progs: add mount status check for btrfs-imageGui Hecheng2014-08-22
| | | | | | | | | | | When btrfs-image run on a mounted filesystem, the undergoing fs operations may change what you have imaged a while ago. In this case, give a warning to remind the user that he may not get a consistent image he wants. Signed-off-by: Gui Hecheng <guihc.fnst@cn.fujitsu.com> [tweaked the message] Signed-off-by: David Sterba <dsterba@suse.cz>
* btrfs-progs: limit minimal num of args for btrfs-imageGui Hecheng2014-08-22
| | | | | | | | | | | The btrfs-image requires at least 2 args to run, one for the source dev/file, the other for the target dev/file. This patch depends on patch: btrfs-progs: move the check_argc_* functions into utils.c Signed-off-by: Gui Hecheng <guihc.fnst@cn.fujitsu.com> Signed-off-by: David Sterba <dsterba@suse.cz>
* btrfs-progs: cleanup unnecessary free if malloc fails in btrfs-imageGui Hecheng2014-08-22
| | | | | | | Don't bother free the buffer if the malloc failed. Signed-off-by: Gui Hecheng <guihc.fnst@cn.fujitsu.com> Signed-off-by: David Sterba <dsterba@suse.cz>
* btrfs-progs: fix btrfs-image old_restore fsck failureGui Hecheng2014-08-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Steps to reproduce: # mkfs.btrfs -f <dev1> # btrfs-image <dev1> <image_file> # btrfs-image -r -o <image_file> <dev2> # btrfs check <dev2> btrfs check output: : read block failed check_tree_block : Couldn't read tree root : Couldn't open file system The btrfs-image should not mess with the chunk tree under the old_restore way. The new restore way was introduced by: commit d6f7e3da0dae7b60cb7565f8a47c3b9045c52d1d Btrfs-progs: make btrfs-image restore with a valid chunk tree V2 ... And the following commit enhanced the new restore on the valid chunk tree building stuff: commit ef2a8889ef813ba77061f6a92f4954d047a78932 Btrfs-progs: make image restore with the original device offsets ... But the second commit should not effect the old_restore way since the old_restore way doesn't try to build a valid chunk tree at all. Signed-off-by: Gui Hecheng <guihc.fnst@cn.fujitsu.com> Signed-off-by: David Sterba <dsterba@suse.cz>
* btrfs-progs: use BTRFS_SUPER_INFO_SIZE to replace raw 4096 in btrfs-imageGui Hecheng2014-08-22
| | | | | Signed-off-by: Gui Hecheng <guihc.fnst@cn.fujitsu.com> Signed-off-by: David Sterba <dsterba@suse.cz>
* btrfs-progs: cleanup possible silent failure in btrfs-imageGui Hecheng2014-08-22
| | | | | | | | | | If the malloc above fails, the btrfs-image will exit directly without any error messages. Now just return the ENOMEM errno and let the caller prompt the error message. Signed-off-by: Gui Hecheng <guihc.fnst@cn.fujitsu.com> Signed-off-by: David Sterba <dsterba@suse.cz>
* btrfs-progs: deal with malloc failure in btrfs-imageGui Hecheng2014-08-22
| | | | | | | | Handle the malloc failure for dump_worker in the same way as the restore worker. Signed-off-by: Gui Hecheng <guihc.fnst@cn.fujitsu.com> Signed-off-by: David Sterba <dsterba@suse.cz>
* btrfs-progs: delete invalid output file when btrfs-image failedGui Hecheng2014-08-22
| | | | | | | | When btrfs-image failed to create an image, the invalid output file had better be deleted to prevent being used mistakenly in the future. Signed-off-by: Gui Hecheng <guihc.fnst@cn.fujitsu.com> Signed-off-by: David Sterba <dsterba@suse.cz>
* btrfs-progs: deal with invalid option combinations for btrfs-imageGui Hecheng2014-08-22
| | | | | | | | | | | | For btrfs-image, dump may not come with option '-o' -r may not come with option '-c', '-s', '-w', dev_cnt != 1 -m may not come with dev_cnt < 2 All of the above should be regarded as invalid combinations, and the usage will show up. Signed-off-by: Gui Hecheng <guihc.fnst@cn.fujitsu.com> Signed-off-by: David Sterba <dsterba@suse.cz>
* btrfs-progs: update manpage for btrfs-image with -m option addedGui Hecheng2014-08-22
| | | | | | | The btrfs-image support multiple devices with -m specified. Signed-off-by: Gui Hecheng <guihc.fnst@cn.fujitsu.com> Signed-off-by: David Sterba <dsterba@suse.cz>
* btrfs-progs: cleanup duplicate assignment of variable leaf for btrfs-imageGui Hecheng2014-08-22
| | | | | | | | The value of variable leaf in while loop don't have to be set for every round. Just move it outside. Signed-off-by: Gui Hecheng <guihc.fnst@cn.fujitsu.com> Signed-off-by: David Sterba <dsterba@suse.cz>
* btrfs-progs: Properly size the leafsize field in the mdrestore_struct structAdam Buchbinder2014-08-22
| | | | | | | | | | It's 32 bits as defined in ctree.h, but the struct had it as 64 bits. Found using MemorySanitizer. Signed-off-by: Adam Buchbinder <abuchbinder@google.com> Reviewed-by: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com> Signed-off-by: David Sterba <dsterba@suse.cz>
* btrfs-image: Fix a data race in build_chunk_tree.Adam Buchbinder2014-08-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A mdrestore_struct was being written to without its mutex being held. This race was found with ThreadSanitizer; the relevant part of the report looks like this: WARNING: ThreadSanitizer: data race (pid=18828) Write of size 8 at 0x7fffffc3d088 by main thread: #0 build_chunk_tree .../btrfs-progs/btrfs-image.c:2233 #1 __restore_metadump .../btrfs-progs/btrfs-image.c:2294 #2 restore_metadump .../btrfs-progs/btrfs-image.c:2345 #3 main .../btrfs-progs/btrfs-image.c:2545 Previous read of size 8 at 0x7fffffc3d088 by thread T1 (mutexes: write M0): #0 restore_worker .../btrfs-progs/btrfs-image.c:1636 Location is stack of main thread. Mutex M0 created at: #0 pthread_mutex_init ??:0 #1 mdrestore_init .../btrfs-progs/btrfs-image.c:1766 #2 __restore_metadump .../btrfs-progs/btrfs-image.c:2286 #3 restore_metadump .../btrfs-progs/btrfs-image.c:2345 #4 main .../btrfs-progs/btrfs-image.c:2545 Thread T1 (tid=18830, running) created by main thread at: #0 pthread_create ??:0 #1 mdrestore_init .../btrfs-progs/btrfs-image.c:1784 #2 __restore_metadump .../btrfs-progs/btrfs-image.c:2286 #3 restore_metadump .../btrfs-progs/btrfs-image.c:2345 #4 main .../btrfs-progs/btrfs-image.c:2545 Signed-off-by: Adam Buchbinder <abuchbinder@google.com> Signed-off-by: David Sterba <dsterba@suse.cz>
* Btrfs-progs: btrfs-image: don't call pthread_join on IDs not presentRakesh Pandit2014-04-22
| | | | | | | | | | | | | | | | If pthread_create fails in mdrestore_init, then number of threads created could be less then num of threads option. Hence pass number of successful pthread_create calls to mdrestore_destroy, so that we don't call pthread_join on IDs not present when pthread_create fails. metadump_init already had this fixed, but repeats code from metadump_destroy. Reuse metadump_destroy by passing number of threads created (successful pthread_create calls) and save repeated cleaup code. Had to move metadump_destroy before metadump_init for obvious reasons. Signed-off-by: Rakesh Pandit <rakesh@tuxera.com> Signed-off-by: David Sterba <dsterba@suse.cz>
* Btrfs-progs: remove unused variable and update btrfs-image man pageRakesh Pandit2014-03-21
| | | | | | | | | | | | | | | | | | | | | | | | Remove unused variable in btrfs-image.c (update_super) and update man page documentation about -r option. Running btrfsck on a restored image produces missing chunk information. This is because by default, btrfs-image fixes up chunk tree to use 1 stripe pointing to the primary device. This in turns results in btrfsck making some noise. $ ./mkfs.btrfs /dev/sdb2 -f $ ./btrfs-image /dev/sdb2 btrfs_image_output $ ./btrfs-image -r btrfs_image_output disk-image $ ./btrfsck disk-image Device extent[1, 29360128, 8388608] didn't find the relative chunk. Device extent[1, 1111490560, 1073741824] didn't find the relative chunk. Ideally btfsck should be updated to reflect this default behavior and not through these messages, but it isn't harmful and can be done later. Signed-off-by: Rakesh Pandit <rakesh@tuxera.com> Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Chris Mason <clm@fb.com>
* btrfs-progs: don't remove BTRFS_BLOCK_GROUP_DUP in chunk typeRakesh Pandit2014-03-21
| | | | | | | | | | | | | | | | | | | | | | | | | | During restoring of image (-r using btrfs-image) we zero out RAID profile in chunk type but forget to save BTRFS_BLOCK_GROUP_DUP if present. This results in some false messages being printed by btrfsck. $ ./mkfs.btrfs /dev/sdb2 -f $ ./btrfs-image /dev/sdb2 btrfs_image_output $ ./btrfs-image -r btrfs_image_output disk-image $ ./btrfsck disk-image Checking filesystem on disk-image UUID: e644be2d-7701-4bd4-8804-7487f560d2a7 checking extents Chunk[256, 228, 20971520]: length(8388608), offset(20971520), type(2) mismatch with block group[20971520, 192, 8388608]: offset(8388608), objectid(20971520), flags(34) Chunk[256, 228, 29360128]: length(1073741824), offset(29360128), type(4) mismatch with block group[29360128, 192, 1073741824]: offset(1073741824), objectid(29360128), flags(36) Block group[20971520, 8388608] (flags = 34) didn't find the relative chunk. Block group[29360128, 1073741824] (flags = 36) didn't find the relative chunk. Even though ./btrfsck on /dev/sdb2 seemed fine. This is due to type mismatch above and type mismatch occured because we zero'ed out BTRFS_BLOCK_GROUP_DUP while handling chunk trees. Signed-off-by: Rakesh Pandit <rakesh@tuxera.com> Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Chris Mason <clm@fb.com>
* Btrfs-progs: switch to arg_strtou64() part2Wang Shilong2014-03-21
| | | | | | 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>
* btrfs-progs: use stripe_len define hereAnand Jain2014-01-31
| | | | | | 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>
* Btrfs-progs: rework open_ctree to take flags, add a new one V2Josef Bacik2013-11-07
| | | | | | | | | | | So I needed to add a flag to not try to read block groups when doing --init-extent-tree since we could hang there, but that meant adding a whole other 0/1 type flag to open_ctree_fs_info. So instead I've converted it all over to using a flags setting and added the flag that I needed. This has been tested with xfstests and make test. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
* btrfs-progs: free eb in fixup_chunk_tree_block()Zach Brown2013-10-16
| | | | | | | | This was found by static analysis. 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>
* btrfs-progs: don't overflow read buffer in imageZach Brown2013-10-16
| | | | | | | | | | search_for_chunk_blocks() allocates a fixed-size buffer and then reads arbitrary u32 sized buffers in to it. Instead let's fail if the item is bigger than the buffer. This was found by static analysis. 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>
* btrfs-progs: don't overrun name in find-collisionsZach Brown2013-10-16
| | | | | | | | | find_collision() allocates name_len bytes for its sub array so the index must be less than name_len. This was found by static analysis. 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>
* btrfs-progs: drop unused parameter from btrfs_item_nrRoss Kirk2013-10-16
| | | | | | | | | | Remove unused eb parameter from btrfs_item_nr, unused since introduced in 7777e63b425f1444d2472ea05a6b2b9cf865f35b Signed-off-by: Ross Kirk <ross.kirk@gmail.com> Reviewed-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
* btrfs-progs: fix -Wmissing-noreturnChris West (Faux)2013-10-16
| | | | | | Signed-off-by: "Chris West (Faux)" <git@goeswhere.com> Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
* btrfs-progs: free local variable buf upon unsuccessful returnsGui Hecheng2013-10-16
| | | | | | | | | The variable "buf" passed into find_collision() as parameter "name" should be freed on unsuccessful returns. 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>
* Btrfs-progs: fix magic return value in btrfs-imgae.cWang Shilong2013-10-16
| | | | | | 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>
* btrfs-progs: drop unused parameter from btrfs_release_pathEric Sandeen2013-09-03
| | | | | | | | | | | | | | | Port of commit b3b4aa7 to userspace. parameter tree root it's not used since commit 5f39d397dfbe140a14edecd4e73c34ce23c4f9ee ("Btrfs: Create extent_buffer interface for large blocksizes") This gets userspace a tad closer to kernelspace by removing this unused parameter that was all over the codebase... Signed-off-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
* Btrfs-progs: sanitize xattrs when we specify sanitizationJosef Bacik2013-09-03
| | | | | | | | | | | Alexandre pointed out that his xattrs have sensitive information in them as well, so fix btrfs-image to zero out the data part of xattrs that we find. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Reviewed-by: Filipe Manana <fdmanana@gmail.com> Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
* btrfs-progs: Cleanup for using BTRFS_SETGET_STACK instead of raw convertQu Wenruo2013-08-09
| | | | | | | | | | | | 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>
* Btrfs-progs: enhance btrfs-image to restore image onto multiple disksLiu Bo2013-07-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds a 'btrfs-image -m' option, which let us restore an image that is built from a btrfs of multiple disks onto several disks altogether. This aims to address the following case, $ mkfs.btrfs -m raid0 sda sdb $ btrfs-image sda image.file $ btrfs-image -r image.file sdc --------- so we can only restore metadata onto sdc, and another thing is we can only mount sdc with degraded mode as we don't provide informations of another disk. And, it's built as RAID0 and we have only one disk, so after mount sdc we'll get into readonly mode. This is just annoying for people(like me) who're trying to restore image but turn to find they cannot make it work. So this'll make your life easier, just tap $ btrfs-image -m image.file sdc sdd --------- then you get everything about metadata done, the same offset with that of the originals(of course, you need offer enough disk size, at least the disk size of the original disks). Besides, this also works with raid5 and raid6 metadata image. Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
* Btrfs-progs: cleanup btrfs-image usageLiu Bo2013-07-03
| | | | | | | A '\n' is missing. Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
* Btrfs-progs: fix misuse of skinny metadata in btrfs-imageLiu Bo2013-07-03
| | | | | | | As for skinny metadata, key.offset stores levels rather than extent length. Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
* Btrfs-progs: make image restore with the original device offsetsJosef Bacik2013-06-19
| | | | | | | | | | | | | | | | | | | | | I noticed a slight problem with btrfs-image, since it was building a chunk tree by setting the physical offset of the stripes to the same as the logical offset it created this problem where the super block was now mapped into the file system differently than it was before. This isn't a huge deal except that we also carry along the free space cache with us, which is setup with the idea that super at physical X is at logical Y. So this would make the free space checker in fsck freak out because it would see that the cache says that the super block is free space, and that the area where it thought the super block was located is in fact used. In the mount case we'd end up overwriting real metadata with backup super blocks. So we need to maintain the physical offsets in our stripes. This is a huge pain because we store the logical bytenrs of all of our metadata. This patch scans the entire image looking for chunk tree blocks and builds an in memory chunk tree so we can write logical blocks to their physical offsets. With this patch we no longer have the problems I described above. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
* Btrfs-image: add the ability to santize file names when making an imageJosef Bacik2013-06-19
| | | | | | | | | | | | | | | | | | | We've had a few users who wouldn't (or couldn't) provide us btrfs-images because we maintain the file names when making an image. So introduce a sanitize option. There are two uses, one that is fast and the other that is dog slow. The fast way just generates garbage that's equal in length to the original name. The slow way will try and find a crc32c collision for the file name that is also the same length. Finding a crc32c collision for the file name "btrfs-progs" on my box without CPU crc32c support takes a little more than 3 minutes, and a little less than 2 minutes for my box that has CPU crc32c support, so it's a lengthy and CPU intensive process. The idea is that we use -s for most cases, and then only use -ss when we need the file system tree to be somewhat sane. I could probably do a better job about finding collisions, but I'll have to revist that later. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
* btrfs-image: fix reading the super block on big metadata blocksChris Mason2013-05-03
| | | | | | | btrfs-image is assuming that every metadata block is the same size. The super is a special snowflake though. It's 4K even on 64K filesystems. Signed-off-by: Chris Mason <chris.mason@fusionio.com>
* Btrfs-progs: add an option to btrfs-image to walk the treesJosef Bacik2013-04-23
| | | | | | | | | | | | When working with a user with a broken file system I noticed I wasn't able to read some of the blocks properly from the restored image. This is because his extent tree was corrupt and was missing references to some of the blocks, which means they weren't copied into the image when he generated it. So add a -w option which will walk all of the trees manually and copy them into the image. This way we can run fsck against a complete file system image and fix any bugs in fsck. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com>
* Btrfs-progs: add skinny metadata support to progs V3Josef Bacik2013-04-23
| | | | | | | | | This fixes up the progs to properly deal with skinny metadata. This adds the -x option to mkfs and btrfstune for enabling the skinny metadata option. This also makes changes to fsck so it can properly deal with the skinny metadata entries. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com>
* Btrfs-progs: make btrfs-image restore with a valid chunk tree V2Josef Bacik2013-04-09
| | | | | | | | | | | | | | | | | | | | Previously btrfs-image would set a METADUMP flag and would make one big system chunk to cover the entire file system in the super in order to get around the unpleasant business of having to adjust the chunk tree. This meant that you could use the progs stuff on a restored file system, which is great for testing btrfsck and other such things. But we want to be able to run the tree log replay on a file system that is not able to run the tree log replay. So in order to do this we need to fixup the super's chunk array and the chunk tree itself. This is pretty easy since we restore using the logical offsets of the metadata, so we just have to set the chunk items to have 1 stripe and have the stripes point at the primary device and then use the logical offset of the chunk as the physical offset. With this patch I can restore a file system image that had a tree log and mount the file system and have the log be replayed successfully. This patch also gives you the -o option in case you want the old restore way, in the case where we want to make sure the system chunks as they were given to us are correct. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com>
* Btrfs-progs: make btrfs-image grab the free space cacheJosef Bacik2013-03-21
| | | | | | | | | A lot of tree log replay bugs are because of strange space cache setups, so make btrfs-image scrape the free space cache as well so we can better replicate what a user is seeing if they have a tree log bug or anything related to free space cache. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com>
* Btrfs-progs: make btrfs-image copy the tree logs if they existJosef Bacik2013-03-21
| | | | | | | | | | Currently btrfs-image doesn't copy the tree logs, which doesn't help me when we're trying to debug log replay bugs. Since we don't have entries in the extent root for the blocks we have to walk down all of the trees in order to copy them. With this patch I can image a file system with a tree log and it works fine. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com>
* Btrfs-progs: cleanup error handling in btrfs-imageJosef Bacik2013-03-21
| | | | | | | | | We use BUG_ON() everywhere in btrfs-image. When users are going to use this command things are pretty dire, so I'd rather have really good error messages so I know what happened rather than figure out which one of the 20 BUG_ON()'s made the stupid thing exit early. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com>
* btrfs-progs: free allocated metadump structure on restore failureEric Sandeen2013-03-10
| | | | | | Don't return w/ "metadump" still allocated Signed-off-by: Eric Sandeen <sandeen@redhat.com>
* btrfs-progs: fix mdresotre typo in function namesEric Sandeen2013-02-05
| | | | | | | | "mdresotre" sounds like it might be French, but most likely it's a misspelling of mdrestore. Fix it. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: Zach Brown <zab@redhat.com>
* btrfs-progs: Handle errors returned from open_ctreeDanny Kukawka2013-01-21
| | | | | Signed-off-by: Danny Kukawka <danny.kukawka@bisect.de> Signed-off-by: David Sterba <dsterba@suse.cz>
* Mixed back reference (FORWARD ROLLING FORMAT CHANGE)Chris Mason2009-06-08
| | | | | | | | | | | | | | | | | This commit introduces a new kind of back reference for btrfs metadata. Once a filesystem has been mounted with this commit, IT WILL NO LONGER BE MOUNTABLE BY OLDER KERNELS. The new back ref provides information about pointer's key, level and in which tree the pointer lives. This information allow us to find the pointer by searching the tree. The shortcoming of the new back ref is that it only works for pointers in tree blocks referenced by their owner trees. This is mostly a problem for snapshots, where resolving one of these fuzzy back references would be O(number_of_snapshots) and quite slow. The solution used here is to use the fuzzy back references in the common case where a given tree block is only referenced by one root, and use the full back references when multiple roots have a reference
* btrfs-image.c: fix return valuesWang Cong2009-01-21
| | | | | | | | - Exit with non-zero when fail; - Don't exit in non-main functions, return. Signed-off-by: WANG Cong <wangcong@zeuux.org>
* Fix image tool compile warningsyanhai zhu2008-12-02
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* Btrfs image toolYan Zheng2008-11-20
This patch adds btrfs image tool. The image tool is a debugging tool that creates/restores btrfs metadump image. Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
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