search for: itemoff

Hi! I used to have arch linux running on 1 btrfs partition (sda1, incl. /boot). When switching to 3.2.5 recently the system fails to boot: (after udevd) /etc/rc.sysinit: line 15: 117 Bus error mountpoint -q /proc and so on, no idea. It used to boot with 3.2.4, but 1) I obviously had some corruption in the tree, when I tried to delete a certain file I hit e.g. "kernel BUG at

...fi sync /mnt/btrfs Right after the btrfs fi sync command (a second or 2 for example), power off the machine and reboot it. The file will be empty, as it can be verified after mounting the filesystem and through btrfs-debug-tree: $ btrfs-debug-tree /dev/sdb3 | egrep ''\(257 INODE_ITEM 0\) itemoff'' -B 3 -A 8 item 3 key (256 DIR_INDEX 2) itemoff 3751 itemsize 36 location key (257 INODE_ITEM 0) type FILE namelen 6 datalen 0 name: foobar item 4 key (257 INODE_ITEM 0) itemoff 3591 itemsize 160 inode generation 7 transid 7...

[11558.527680] ------------[ cut here ]------------ [11558.527708] kernel BUG at fs/btrfs/transaction.c:1337! [11558.527730] invalid opcode: 0000 [#1] PREEMPT SMP [11558.527764] CPU 1 [11558.527776] Modules linked in: loop nls_cp437 vfat fat dm_mod xfs exportfs jfs usb_storage uas fuse ext4 jbd2 mbcache snd_hda_codec_hdmi snd_hda_codec_realtek arc4 iwlwifi snd_hda_intel snd_hda_codec uvcvideo

...e three there is one 4MB andthree 8MB, one with 2 stripes. #btrfs-debug-tree /dev/mapper/vg-lvtest chunk tree leaf 20979712 items 12 free space 2557 generation 5 owner 3 fs uuid 6accfaf3-c88a-462e-85fc-35513d0b43d6 chunk uuid 65f22206-a9dd-4053-a660-61bc4ee0be12 item 0 key (DEV_ITEMS DEV_ITEM 1) itemoff 3897 itemsize 98 dev item devid 1 total_bytes 116912029696 bytes used 8627683328 item 1 key (FIRST_CHUNK_TREE CHUNK_ITEM 0) itemoff 3817 itemsize 80 chunk length 4194304 owner 2 type 2 num_stripes 1 stripe 0 devid 1 offset 0 item 2 key (FIRST_CHUNK_TREE CHUNK_ITEM 4194304) itemoff 3737 ite...

Hi, I am using kernel 3.7-rc6. I have written a test application for extended attributes and have for some folders a wired behaviour: #include <stdio.h> #include <string.h> #include <attr/xattr.h> char attrs[1024]; ssize_t attrslen; int i; char value[1024]; ssize_t valuelen; int main(int argc, char *argv[]) { if (argc != 2) { fprintf(stderr, "Syntax: testxattr

...pdate is lost -- block layer, write caches of the disk. btrfs-debug-tree says it''s: chunk tree leaf 20971520 items 6 free space 3283 generation 4 owner 3 fs uuid 024cd2e6-d584-493c-af81-fa3e2f548abb chunk uuid 3f52ec70-89a9-4cd5-b5f0-177d7ae63de3 item 0 key (DEV_ITEMS DEV_ITEM 1) itemoff 3897 itemsize 98 dev item devid 1 total_bytes 10737418240 bytes used 2185232384 item 1 key (FIRST_CHUNK_TREE CHUNK_ITEM 0) itemoff 3817 itemsize 80 chunk length 4194304 owner 2 type 2 num_stripes 1 stripe 0 devid 1 offset 0 ite...

...e: 257 Links: 1 [root@f18 dir]# rm fail-please rm: cannot remove ‘fail-please’: Cannot allocate memory [root@f18 dir]# ls -la total 4 drwxr-xr-x. 1 root root 22 Mar 1 17:33 . drwxr-xr-x. 1 root root 6 Mar 1 17:33 .. (only 257 items in debug-tree) item 4 key (257 INODE_ITEM 0) itemoff 3597 itemsize 160 inode generation 5 transid 5 size 22 block group 0 mode 40755 links 1 item 5 key (257 INODE_REF 256) itemoff 3584 itemsize 13 inode ref index 2 namelen 3 name: dir item 6 key (257 XATTR_ITEM 3817753667) itemoff 3506 itemsize 78...

...M count=100 mkfs.btrfs -f test.img btrfs-debug-tree test.img extent tree key (EXTENT_TREE ROOT_ITEM 0) leaf 4210688 items 10 free space 3349 generation 4 owner 2 fs uuid 2e08fd93-f24d-4f44-a226-e2116fcd544f chunk uuid dc482988-6246-46ce-9329-68bcf6d3683c item 0 key (0 BLOCK_GROUP_ITEM 4194304) itemoff 3971 itemsize 24 block group used 12288 chunk_objectid 256 flags 2 [..snip..] item 3 key (1138688 EXTENT_ITEM 4096) itemoff 3827 itemsize 42 extent refs 1 gen 1 flags 2 tree block key (0 UNKNOWN.0 0) level 0 item 4 key (1138688 TREE_BLOCK_REF 7) itemoff 3827 itemsize 0 tree block backref...

I have accidently damaged the first block(s) of a btrfs partition and can''t mount it anymore. I can see that my data is still intact by running a command like: cat /dev/sda5 | hexdump -C | more Do any (experimental) tools exist which would allow me to recover the files? Thank you -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a

...; @@ -212,25 +212,32 @@ int make_btrfs(int fd, const char *devic extent_item = btrfs_item_ptr(buf, nritems, struct btrfs_extent_item); btrfs_set_extent_refs(buf, extent_item, 1); + btrfs_set_extent_generation(buf, extent_item, 1); + nritems++; + + /* create tree block info */ + itemoff = itemoff - sizeof(struct btrfs_tree_block_info); + btrfs_set_disk_key_objectid(&disk_key, blocks[i]); + btrfs_set_disk_key_offset(&disk_key, 0); + btrfs_set_disk_key_type(&disk_key, BTRFS_TREE_BLOCK_INFO_KEY); + btrfs_set_item_key(buf, &disk_key, nritems); + btrfs_set_item_off...

..._extent_refs(buf, extent_item, 1); nritems++; - for (i = 0; i < 4; i++) { - if (blocks[i] < first_free) { - BUG_ON(i > 0); - continue; - } + for (i = 1; i < 4; i++) { + BUG_ON(blocks[i] < first_free); + BUG_ON(blocks[i] < blocks[i - 1]); + /* create extent item */ itemoff = itemoff - sizeof(struct btrfs_extent_item); btrfs_set_disk_key_objectid(&disk_key, blocks[i]);