Boaz Harrosh 04dc1e88ad exofs: Multi-device mirror support ... This patch changes on-disk format, it is accompanied with a parallel patch to mkfs.exofs that enables multi-device capabilities. After this patch, old exofs will refuse to mount a new formatted FS and new exofs will refuse an old format. This is done by moving the magic field offset inside the FSCB. A new FSCB *version* field was added. In the future, exofs will refuse to mount unmatched FSCB version. To up-grade or down-grade an exofs one must use mkfs.exofs --upgrade option before mounting. Introduced, a new object that contains a *device-table*. This object contains the default *data-map* and a linear array of devices information, which identifies the devices used in the filesystem. This object is only written to offline by mkfs.exofs. This is why it is kept separate from the FSCB, since the later is written to while mounted. Same partition number, same object number is used on all devices only the device varies. * define the new format, then load the device table on mount time make sure every thing is supported. * Change I/O engine to now support Mirror IO, .i.e write same data to multiple devices, read from a random device to spread the read-load from multiple clients (TODO: stripe read) Implementation notes: A few points introduced in previous patch should be mentioned here: * Special care was made so absolutlly all operation that have any chance of failing are done before any osd-request is executed. This is to minimize the need for a data consistency recovery, to only real IO errors. * Each IO state has a kref. It starts at 1, any osd-request executed will increment the kref, finally when all are executed the first ref is dropped. At IO-done, each request completion decrements the kref, the last one to return executes the internal _last_io() routine. _last_io() will call the registered io_state_done. On sync mode a caller does not supply a done method, indicating a synchronous request, the caller is put to sleep and a special io_state_done is registered that will awaken the caller. Though also in sync mode all operations are executed in parallel. Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>		2009-12-10 09:59:23 +02:00
..
9p	9p: fix build breakage introduced by FS-Cache	2009-12-01 07:35:11 -08:00
adfs	adfs: remove redundant test on unsigned	2009-09-24 07:21:05 -07:00
affs
afs	FS-Cache: Handle pages pending storage that get evicted under OOM conditions	2009-11-19 18:11:35 +00:00
autofs	trivial: remove unnecessary semicolons	2009-09-21 15:14:58 +02:00
autofs4	autofs4 - fix missed case when changing to use struct path	2009-08-31 17:44:05 -10:00
befs	fs: Make unload_nls() NULL pointer safe	2009-09-24 07:47:42 -04:00
bfs	headers: smp_lock.h redux	2009-07-12 12:22:34 -07:00
btrfs	Merge branch 'for-next' into for-linus	2009-12-07 18:36:35 +01:00
cachefiles	CacheFiles: Update IMA counters when using dentry_open	2009-12-01 07:35:11 -08:00
cifs	Merge branch 'for-next' into for-linus	2009-12-07 18:36:35 +01:00
coda	sysctl: Drop & in front of every proc_handler.	2009-11-18 08:37:40 -08:00
configfs	writeback: add name to backing_dev_info	2009-09-11 09:20:26 +02:00
cramfs
debugfs	fs/debugfs/inode.c: fix comment typos	2009-12-04 15:39:52 +01:00
devpts	Move magic numbers into magic.h	2009-09-23 07:39:28 -07:00
dlm	tree-wide: fix assorted typos all over the place	2009-12-04 15:39:55 +01:00
ecryptfs	ima: ecryptfs fix imbalance message	2009-10-08 11:31:38 -05:00
efs
exofs	exofs: Multi-device mirror support	2009-12-10 09:59:23 +02:00
exportfs
ext2	Merge branch 'hwpoison' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6	2009-09-24 07:53:22 -07:00
ext3	Merge branch 'for-next' into for-linus	2009-12-07 18:36:35 +01:00
ext4	Merge branch 'for-next' into for-linus	2009-12-07 18:36:35 +01:00
fat	Merge git://git.kernel.org/pub/scm/linux/kernel/git/hirofumi/fatfs-2.6	2009-09-30 09:31:14 -07:00
freevxfs	headers: smp_lock.h redux	2009-07-12 12:22:34 -07:00
fscache	FS-Cache: Provide nop fscache_stat_d() if CONFIG_FSCACHE_STATS=n	2009-11-20 21:50:44 +00:00
fuse	fuse: reject O_DIRECT flag also in fuse_create	2009-11-27 16:37:13 +01:00
gfs2	GFS2: Fix glock refcount issues	2009-12-03 12:00:12 +00:00
hfs	hfs: fix oops on mount with corrupted btree extent records	2009-10-29 07:39:29 -07:00
hfsplus	hfsplus: refuse to mount volumes larger than 2TB	2009-10-29 07:39:27 -07:00
hostfs	hostfs: set maximum filesize in superblock for proper LFS support	2009-06-30 18:56:03 -07:00
hpfs	headers: smp_lock.h redux	2009-07-12 12:22:34 -07:00
hppfs
hugetlbfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2009-09-24 08:32:11 -07:00
isofs	fs: Make unload_nls() NULL pointer safe	2009-09-24 07:47:42 -04:00
jbd	fs/jbd: Export log_start_commit to fix ext3 build.	2009-11-12 10:24:12 +01:00
jbd2	JBD/JBD2: free j_wbuf if journal init fails.	2009-11-11 15:24:14 +01:00
jffs2	Merge branch 'for-next' into for-linus	2009-12-07 18:36:35 +01:00
jfs	tree-wide: fix assorted typos all over the place	2009-12-04 15:39:55 +01:00
lockd	sysctl: Drop & in front of every proc_handler.	2009-11-18 08:37:40 -08:00
minix	V3 minixfs: add missing directory type checking	2009-09-23 07:39:57 -07:00
ncpfs	tree-wide: fix assorted typos all over the place	2009-12-04 15:39:55 +01:00
nfs	Merge branch 'for-2.6.33' of git://git.kernel.dk/linux-2.6-block	2009-12-08 08:19:16 -08:00
nfs_common
nfsd	Fix memory corruption caused by nfsd readdir+	2009-11-14 12:55:55 -08:00
nilfs2	nilfs2: deleted inconsistent comment in nilfs_load_inode_block()	2009-11-15 17:17:46 +09:00
nls	Merge git://git.kernel.org/pub/scm/linux/kernel/git/hirofumi/fatfs-2.6	2009-09-30 09:31:14 -07:00
notify	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-12-09 19:43:33 -08:00
ntfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-12-09 19:43:33 -08:00
ocfs2	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-12-09 19:43:33 -08:00
omfs	tree-wide: fix assorted typos all over the place	2009-12-04 15:39:55 +01:00
openpromfs
partitions	partitions: read whole sector with EFI GPT header	2009-11-23 09:29:58 +01:00
proc	Merge git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/sysctl-2.6	2009-12-08 07:38:50 -08:00
qnx4	qnx4fs: add missing KERN_xxx to printk() calls	2009-11-09 09:40:57 +01:00
quota	Merge git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/sysctl-2.6	2009-12-08 07:38:50 -08:00
ramfs	truncate: use new helpers	2009-09-24 08:41:47 -04:00
reiserfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-12-09 19:43:33 -08:00
romfs	ROMFS: fix length used with romfs_dev_strnlen() function	2009-10-11 11:33:56 -07:00
smbfs	fs: Make unload_nls() NULL pointer safe	2009-09-24 07:47:42 -04:00
squashfs	const: mark remaining super_operations const	2009-09-22 07:17:24 -07:00
sysfs	sysfs: Don't leak secdata when a sysfs_dirent is freed.	2009-11-05 08:19:18 +11:00
sysv
ubifs	tree-wide: fix assorted typos all over the place	2009-12-04 15:39:55 +01:00
udf	udf: Fix possible corruption when close races with write	2009-09-14 19:13:01 +02:00
ufs	ufs: sector_t cannot be negative	2009-06-18 13:03:46 -07:00
xfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-12-09 19:43:33 -08:00
aio.c	block: move bdi/address_space unplug functions to backing-dev.h	2009-10-29 13:59:26 +01:00
anon_inodes.c	headers: remove sched.h from poll.h	2009-10-04 15:05:10 -07:00
attr.c	truncate: new helpers	2009-09-24 08:41:47 -04:00
bad_inode.c
binfmt_aout.c
binfmt_elf.c	tree-wide: fix assorted typos all over the place	2009-12-04 15:39:55 +01:00
binfmt_elf_fdpic.c	fdpic: ignore the loader's PT_GNU_STACK when calculating the stack size	2009-09-24 07:21:02 -07:00
binfmt_em86.c
binfmt_flat.c	flat: use IS_ERR_VALUE() helper macro	2009-09-24 07:21:03 -07:00
binfmt_misc.c
binfmt_script.c
binfmt_som.c
bio-integrity.c	block: Create bip slabs with embedded integrity vectors	2009-07-01 10:56:25 +02:00
bio.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-12-09 19:43:33 -08:00
block_dev.c	Merge branch 'for-linus' into for-2.6.33	2009-11-03 21:14:39 +01:00
buffer.c	Merge branch 'writeback' of git://git.kernel.dk/linux-2.6-block	2009-09-25 09:27:30 -07:00
char_dev.c	fs/char_dev.c: remove useless loop	2009-09-24 07:21:03 -07:00
compat.c	x86, fs: Fix x86 procfs stack information for threads on 64-bit	2009-11-04 13:25:03 +01:00
compat_binfmt_elf.c
compat_ioctl.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-12-09 19:43:33 -08:00
dcache.c	sched: Pull up the might_sleep() check into cond_resched()	2009-07-18 15:51:44 +02:00
dcookies.c
direct-io.c	Fix regression in direct writes performance due to WRITE_ODIRECT flag removal	2009-11-26 09:46:46 +01:00
drop_caches.c	sysctl: remove "struct file *" argument of ->proc_handler	2009-09-24 07:21:04 -07:00
eventfd.c	anonfd: split interface into file creation and install	2009-09-23 07:39:29 -07:00
eventpoll.c	sysctl: Drop & in front of every proc_handler.	2009-11-18 08:37:40 -08:00
exec.c	Merge branch 'master' into next	2009-12-03 12:03:40 +05:30
fcntl.c	fcntl: rename F_OWNER_GID to F_OWNER_PGRP	2009-11-17 17:40:33 -08:00
fifo.c
file.c	headers: remove sched.h from interrupt.h	2009-10-11 11:20:58 -07:00
file_table.c	LSM: imbed ima calls in the security hooks	2009-10-25 12:22:48 +08:00
filesystems.c
fs-writeback.c	writeback: remove unused nonblocking and congestion checks	2009-12-03 13:54:25 +01:00
fs_struct.c
generic_acl.c
inode.c	LSM: imbed ima calls in the security hooks	2009-10-25 12:22:48 +08:00
internal.h	fs: fix overflow in sys_mount() for in-kernel calls	2009-09-24 08:40:15 -04:00
ioctl.c	__generic_block_fiemap(): fix for files bigger than 4GB	2009-11-12 07:26:01 -08:00
ioprio.c
Kconfig	powerpc: Cleanup Kconfig selection of hugetlbfs support	2009-10-30 15:03:54 +11:00
Kconfig.binfmt
libfs.c	libfs: return error code on failed attr set	2009-09-24 07:47:30 -04:00
locks.c	const: make lock_manager_operations const	2009-09-22 07:17:25 -07:00
Makefile
mbcache.c
mpage.c
namei.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6	2009-09-11 08:55:49 -07:00
namespace.c	LSM: Pass original mount flags to security_sb_mount().	2009-10-12 10:56:03 +11:00
nfsctl.c
no-block.c
open.c	LSM: Move security_path_chmod()/security_path_chown() to after mutex_lock().	2009-11-24 08:49:26 +11:00
pipe.c	fs: pipe.c null pointer dereference	2009-10-22 08:11:44 +09:00
pnode.c
pnode.h
posix_acl.c
read_write.c	sendfile(): check f_op.splice_write() rather than f_op.sendpage()	2009-11-04 09:09:52 +01:00
read_write.h
readdir.c
select.c	headers: remove sched.h from poll.h	2009-10-04 15:05:10 -07:00
seq_file.c	vfs: seq_file: add helpers for data filling	2009-09-24 07:47:35 -04:00
signalfd.c
splice.c	sendfile(): check f_op.splice_write() rather than f_op.sendpage()	2009-11-04 09:09:52 +01:00
stack.c
stat.c
super.c	freeze_bdev: grab active reference to frozen superblocks	2009-09-24 07:47:41 -04:00
sync.c	fs/buffer.c: clean up EXPORT* macros	2009-09-23 07:39:29 -07:00
timerfd.c
utimes.c
xattr.c	VFS: Factor out part of vfs_setxattr so it can be called from the SELinux hook for inode_setsecctx.	2009-09-10 10:11:22 +10:00
xattr_acl.c	VFS: Use GFP_NOFS in posix_acl_from_xattr()	2009-12-03 11:48:07 +00:00