Commit Graph

15 Commits

Author SHA1 Message Date
Arvin Schnell
0c38ff3ca4 btrfs-progs: make libbtrfs usable from C++
Please find attached a patch to make the new libbtrfs usable from
C++ (at least for the parts snapper will likely need).

Signed-off-by: Arvin Schnell <aschnell@suse.de>
Signed-off-by: Mark Fasheh <mfasheh@suse.de>
2013-02-19 11:15:30 +01:00
Chris Mason
82ac34581e Merge branch 'cov-fixes-v1-integration-20130201' of http://git.zabbo.net/cgit/btrfs-progs into merged 2013-02-06 12:51:58 -05:00
Zach Brown
09fac3824d btrfs-progs: don't leak in set_extent_bits
It looks possible to hit the search_again label without using the
prealloc.  A new prealloc is allocated, leaking the current one.

Every use of prealloc sets it to null so let's just allocate a new
prealloc when we don't already have one.

Signed-off-by: Zach Brown <zab@redhat.com>
2013-02-05 16:09:40 -08:00
David Woodhouse
4d48b96b28 Add basic RAID[56] support
David Woodhouse originally contributed this code, and Chris Mason
changed it around to reflect the current design goals for raid56.

The original code expected all metadata and data writes to be full
stripes.  This meant metadata block size == stripe size, and had a few
other restrictions.

This version allows metadata blocks smaller than the stripe size.  It
implements both raid5 and raid6, although it does not have code to
rebuild from parity if one of the drives is missing or incorrect.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-02-01 14:22:07 -05:00
Chris Mason
b7ad5a8456 Allow extent_buffers to use more ram
This changes free_some_buffers (called each time we allocate an extent
buffer) to allow a higher hard limit on the number of extent buffers
in use.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
2012-02-06 05:08:06 -05:00
Chris Mason
e7580bb296 Add open_ctree_fs_info for partial FS opens
fsck needs to be able to open a damaged FS, which means open_ctree needs
to be able to return a damaged FS.

This adds a new open_ctree_fs_info which can be used to open any and all
roots that are valid.  btrfs-debug-tree is changed to use it.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
2012-02-05 16:11:48 -05:00
Josef Bacik
be826706b5 btrfs-progs: add a recovery utility to pull files from damanged filesystems
Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-10-27 12:49:54 -04:00
Sergei Trofimovich
8e4b7e883a mkfs.btrfs: write zeroes instead on uninitialized data.
Found by valgrind:
==8968== Use of uninitialised value of size 8
==8968==    at 0x41CE7D: crc32c_le (crc32c.c:98)
==8968==    by 0x40A1D0: csum_tree_block_size (disk-io.c:82)
==8968==    by 0x40A2D4: csum_tree_block (disk-io.c:105)
==8968==    by 0x40A7D6: write_tree_block (disk-io.c:241)
==8968==    by 0x40ACEE: __commit_transaction (disk-io.c:354)
==8968==    by 0x40AE9E: btrfs_commit_transaction (disk-io.c:385)
==8968==    by 0x42CF66: make_image (mkfs.c:1061)
==8968==    by 0x42DE63: main (mkfs.c:1410)
==8968==  Uninitialised value was created by a stack allocation
==8968==    at 0x42B5FB: add_inode_items (mkfs.c:493)

1. On-disk inode format has reserved (and thus, random at alloc time) fields:
   btrfs_inode_item: __le64 reserved[4]
2. Sometimes extents are created on disk without writing data there.
   (Or at least not all data is written there). Kernel code always had
   it kzalloc'ed.
Zero them all.

Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
Signed-off-by: Hugo Mills <hugo@carfax.org.uk>
2011-10-25 09:18:58 -04:00
Chris Ball
fcdc0929c6 Fix unused-but-set errors in gcc-4.6
gcc-4.6 (as shipped in Fedora) turns on -Wunused-but-set-variable by
default, which breaks the build when combined with -Wall, e.g.:

debug-tree.c: In function ‘print_extent_leaf’:
debug-tree.c:45:13: error: variable ‘last_len’ set but not used [-Werror=unused-but-set-variable]
debug-tree.c:44:13: error: variable ‘last’ set but not used [-Werror=unused-but-set-variable]
debug-tree.c:41:21: error: variable ‘item’ set but not used [-Werror=unused-but-set-variable]
cc1: all warnings being treated as errors

This patch fixes the errors by removing the unused variables.

Signed-off-by: Chris Ball <cjb@laptop.org>
Signed-off-by: Hugo Mills <hugo@carfax.org.uk>
2011-10-25 09:18:32 -04:00
Chris Mason
95d3f20b51 Mixed back reference (FORWARD ROLLING FORMAT CHANGE)
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
2009-06-08 13:30:36 -04:00
Chris Mason
351d17fca2 Verify parent generation number on btree reads 2008-05-13 13:48:58 -04:00
Chris Mason
8bfbb6b6f8 Update the Ext3 converter
The main changes in this patch are adding chunk handing and data relocation
ability. In the last step of conversion, the converter relocates data in system
chunk and move chunk tree into system chunk. In the rollback process, the
converter remove chunk tree from system chunk and copy data back.

Regards
YZ
---
2008-04-22 14:06:56 -04:00
Alex Chiang
857e9a2a63 btrfs-progs: Fix printf format casting errors
We get lots of warnings of the flavor:

utils.c:441: warning: format '%Lu' expects type 'long long unsigned int' but argument 2 has type 'u64'

And thanks to -Werror, the build fails. Clean up these printfs
by properly casting the arg to the format specified.

Signed-off-by: Alex Chiang <achiang@hp.com>
2008-04-01 10:52:22 -04:00
Chris Mason
510be29677 Add support for multiple devices per filesystem 2008-03-24 15:03:18 -04:00
Chris Mason
80791984f6 Rename the extent_map code to extent_io
This mirrors the changes in the kernel code.
2008-03-04 11:16:54 -05:00