Yan Zheng 2b82032c34 Btrfs: Seed device support ... Seed device is a special btrfs with SEEDING super flag set and can only be mounted in read-only mode. Seed devices allow people to create new btrfs on top of it. The new FS contains the same contents as the seed device, but it can be mounted in read-write mode. This patch does the following: 1) split code in btrfs_alloc_chunk into two parts. The first part does makes the newly allocated chunk usable, but does not do any operation that modifies the chunk tree. The second part does the the chunk tree modifications. This division is for the bootstrap step of adding storage to the seed device. 2) Update device management code to handle seed device. The basic idea is: For an FS grown from seed devices, its seed devices are put into a list. Seed devices are opened on demand at mounting time. If any seed device is missing or has been changed, btrfs kernel module will refuse to mount the FS. 3) make btrfs_find_block_group not return NULL when all block groups are read-only. Signed-off-by: Yan Zheng <zheng.yan@oracle.com>		2008-11-17 21:11:30 -05:00
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acl.c	Btrfs: optimize btrget/set/removexattr	2008-09-25 11:04:07 -04:00
async-thread.c	Btrfs: Add ordered async work queues	2008-11-06 22:03:00 -05:00
async-thread.h	Btrfs: Add ordered async work queues	2008-11-06 22:03:00 -05:00
btrfs_inode.h	Btrfs: add and improve comments	2008-09-29 15:18:18 -04:00
compat.h	Remove Btrfs compat code for older kernels	2008-09-25 15:41:59 -04:00
compression.c	Btrfs: Fix compile warnings on 32 bit machines	2008-11-11 09:34:41 -05:00
compression.h	Btrfs: Add zlib compression support	2008-10-29 14:49:59 -04:00
COPYING	Btrfs: add GPLv2	2007-06-12 09:07:21 -04:00
crc32c.h	Btrfs: add and improve comments	2008-09-29 15:18:18 -04:00
ctree.c	Btrfs: Seed device support	2008-11-17 21:11:30 -05:00
ctree.h	Btrfs: Seed device support	2008-11-17 21:11:30 -05:00
dir-item.c	Btrfs: add and improve comments	2008-09-29 15:18:18 -04:00
disk-io.c	Btrfs: Seed device support	2008-11-17 21:11:30 -05:00
disk-io.h	Btrfs: mount ro and remount support	2008-11-12 14:34:12 -05:00
export.c	Remove Btrfs compat code for older kernels	2008-09-25 15:41:59 -04:00
export.h	NFS support for btrfs - v3	2008-09-25 11:04:06 -04:00
extent_io.c	Btrfs: Fix compile warnings on 32 bit machines	2008-11-11 09:34:41 -05:00
extent_io.h	Btrfs: Optimize compressed writeback and reads	2008-11-06 22:02:51 -05:00
extent_map.c	Btrfs: Add zlib compression support	2008-10-29 14:49:59 -04:00
extent_map.h	Btrfs: Fix csum error for compressed data	2008-11-10 07:34:43 -05:00
extent-tree.c	Btrfs: Seed device support	2008-11-17 21:11:30 -05:00
file-item.c	Btrfs: Use invalidatepage when writepage finds a page outside of i_size	2008-11-10 11:50:50 -05:00
file.c	Btrfs: Fix starting search offset inside btrfs_drop_extents	2008-11-11 09:33:29 -05:00
free-space-cache.c	Btrfs: nuke fs wide allocation mutex V2	2008-10-29 14:49:05 -04:00
hash.h	Switch btrfs_name_hash() to crc32c	2008-09-25 11:04:06 -04:00
inode-item.c	Btrfs: Implement new dir index format	2008-09-25 11:04:05 -04:00
inode-map.c	Btrfs: extent_map and data=ordered fixes for space balancing	2008-09-26 10:05:38 -04:00
inode.c	Btrfs: mount ro and remount support	2008-11-12 14:34:12 -05:00
INSTALL	Btrfs: Documentation update	2007-06-22 14:49:31 -04:00
ioctl.c	Btrfs: Seed device support	2008-11-17 21:11:30 -05:00
ioctl.h	Btrfs: allow clone of an arbitrary file range	2008-11-12 14:32:25 -05:00
locking.c	Btrfs: add and improve comments	2008-09-29 15:18:18 -04:00
locking.h	btrfs_search_slot: reduce lock contention by cowing in two stages	2008-09-25 11:04:06 -04:00
Makefile	Btrfs: Add zlib compression support	2008-10-29 14:49:59 -04:00
ordered-data.c	Btrfs: Optimize compressed writeback and reads	2008-11-06 22:02:51 -05:00
ordered-data.h	Btrfs: Add fallocate support v2	2008-10-30 14:25:28 -04:00
orphan.c	Btrfs: Create orphan inode records to prevent lost files after a crash	2008-09-25 11:04:05 -04:00
print-tree.c	Btrfs: Add zlib compression support	2008-10-29 14:49:59 -04:00
print-tree.h	Btrfs: Create extent_buffer interface for large blocksizes	2008-09-25 11:03:56 -04:00
ref-cache.c	Btrfs: add and improve comments	2008-09-29 15:18:18 -04:00
ref-cache.h	Btrfs: add and improve comments	2008-09-29 15:18:18 -04:00
root-tree.c	Btrfs: add and improve comments	2008-09-29 15:18:18 -04:00
struct-funcs.c	Btrfs: add and improve comments	2008-09-29 15:18:18 -04:00
super.c	Btrfs: Seed device support	2008-11-17 21:11:30 -05:00
sysfs.c	Remove Btrfs compat code for older kernels	2008-09-25 15:41:59 -04:00
transaction.c	Btrfs: Avoid unplug storms during commit	2008-11-07 18:22:45 -05:00
transaction.h	Btrfs: Record dirty pages tree-log pages in an extent_io tree	2008-09-25 11:04:07 -04:00
tree-defrag.c	Btrfs: nuke fs wide allocation mutex V2	2008-10-29 14:49:05 -04:00
tree-log.c	Btrfs: Add fallocate support v2	2008-10-30 14:25:28 -04:00
tree-log.h	Btrfs: Add a write ahead tree log to optimize synchronous operations	2008-09-25 11:04:07 -04:00
version.h	Update Btrfs files for in-kernel usage	2008-09-25 15:41:59 -04:00
version.sh	Btrfs: Update version.sh to v0.16	2008-09-25 11:04:06 -04:00
volumes.c	Btrfs: Seed device support	2008-11-17 21:11:30 -05:00
volumes.h	Btrfs: Seed device support	2008-11-17 21:11:30 -05:00
xattr.c	Btrfs: optimize btrget/set/removexattr	2008-09-25 11:04:07 -04:00
xattr.h	Btrfs: optimize btrget/set/removexattr	2008-09-25 11:04:07 -04:00
zlib.c	Btrfs: Fix compile warnings on 32 bit machines	2008-11-11 09:34:41 -05:00