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b83cc9693f39689490970c19f6c5b866f6719a70
linux/fs/btrfs
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Li Zefan b83cc9693f Btrfs: Add readonly snapshots support 
Usage:

Set BTRFS_SUBVOL_RDONLY of btrfs_ioctl_vol_arg_v2->flags, and call
ioctl(BTRFS_I0CTL_SNAP_CREATE_V2).

Implementation:

- Set readonly bit of btrfs_root_item->flags.
- Add readonly checks in btrfs_permission (inode_permission),
btrfs_setattr, btrfs_set/remove_xattr and some ioctls.

Changelog for v3:

- Eliminate btrfs_root->readonly, but check btrfs_root->root_item.flags.
- Rename BTRFS_ROOT_SNAP_RDONLY to BTRFS_ROOT_SUBVOL_RDONLY.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
2010-12-23 08:49:17 +08:00
..
acl.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable
2010-06-11 14:18:47 -07:00
async-thread.c
Btrfs: don't walk around with task->state != TASK_RUNNING
2010-05-25 10:34:58 -04:00
async-thread.h
Btrfs: fix deadlock on async thread startup
2009-10-05 09:44:45 -04:00
btrfs_inode.h
Btrfs: Metadata reservation for orphan inodes
2010-05-25 10:34:52 -04:00
compat.h
Btrfs: drop remaining LINUX_KERNEL_VERSION checks and compat code
2009-01-06 09:38:55 -05:00
compression.c
btrfs: cleanup duplicate bio allocating functions
2010-11-21 22:26:03 -05:00
compression.h
Btrfs: Add zlib compression support
2008-10-29 14:49:59 -04:00
ctree.c
Btrfs: cleanup warnings from gcc 4.6 (nonbugs)
2010-10-29 15:14:37 -04:00
ctree.h
Btrfs: Add readonly snapshots support
2010-12-23 08:49:17 +08:00
delayed-ref.c
Btrfs: Integrate metadata reservation with start_transaction
2010-05-25 10:34:50 -04:00
delayed-ref.h
Btrfs: Integrate metadata reservation with start_transaction
2010-05-25 10:34:50 -04:00
dir-item.c
Btrfs: Fix variables set but not read (bugs found by gcc 4.6)
2010-10-29 15:14:31 -04:00
disk-io.c
Btrfs: EIO when we fail to read tree roots
2010-12-13 14:47:58 -05:00
disk-io.h
Btrfs: use async helpers for DIO write checksumming
2010-05-25 10:34:58 -04:00
export.c
Btrfs: handle NFS lookups properly
2010-11-21 22:26:08 -05:00
export.h
NFS support for btrfs - v3
2008-09-25 11:04:06 -04:00
extent_io.c
Btrfs: fix fiemap
2010-11-27 13:37:50 -05:00
extent_io.h
btrfs: cleanup duplicate bio allocating functions
2010-11-21 22:26:03 -05:00
extent_map.c
Btrfs: Use ERR_CAST helpers
2010-10-29 15:14:23 -04:00
extent_map.h
Btrfs: search for an allocation hint while filling file COW
2009-09-18 16:08:52 -04:00
extent-tree.c
Btrfs: prevent RAID level downgrades when space is low
2010-12-13 20:07:01 -05:00
file-item.c
Btrfs: add basic DIO read/write support
2010-05-25 10:34:57 -04:00
file.c
Btrfs: pwrite blocked when writing from the mmaped buffer of the same page
2010-12-10 16:29:10 -05:00
free-space-cache.c
Btrfs: deal with space cache errors better
2010-12-09 13:57:12 -05:00
free-space-cache.h
Btrfs: load free space cache if it exists
2010-10-29 09:26:35 -04:00
hash.h
Btrfs: remove crc32c.h and use libcrc32c directly.
2009-06-10 11:29:53 -04:00
inode-item.c
Btrfs: Integrate metadata reservation with start_transaction
2010-05-25 10:34:50 -04:00
inode-map.c
Btrfs: do not reuse objectid of deleted snapshot/subvol
2009-09-21 15:56:00 -04:00
inode.c
Btrfs: Add readonly snapshots support
2010-12-23 08:49:17 +08:00
ioctl.c
Btrfs: Add readonly snapshots support
2010-12-23 08:49:17 +08:00
ioctl.h
Btrfs: Add readonly snapshots support
2010-12-23 08:49:17 +08:00
Kconfig
Revert "task_struct: make journal_info conditional"
2009-12-17 13:23:24 -08:00
locking.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
locking.h
Btrfs: fix spinlock assertions on UP systems
2009-03-09 11:45:38 -04:00
Makefile
Btrfs: Mixed back reference (FORWARD ROLLING FORMAT CHANGE)
2009-06-10 11:29:46 -04:00
ordered-data.c
Btrfs: deal with DIO bios that span more than one ordered extent
2010-11-28 19:56:33 -05:00
ordered-data.h
Btrfs: deal with DIO bios that span more than one ordered extent
2010-11-28 19:56:33 -05:00
orphan.c
Btrfs: fixup return code for btrfs_del_orphan_item
2010-12-09 13:57:15 -05:00
print-tree.c
Btrfs: remove of redundant btrfs_header_level
2009-07-22 16:52:13 -04:00
print-tree.h
Btrfs: Create extent_buffer interface for large blocksizes
2008-09-25 11:03:56 -04:00
ref-cache.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
ref-cache.h
Btrfs: use RB_ROOT to intialize rb_trees instead of setting rb_node to NULL
2010-03-08 16:26:50 -05:00
relocation.c
Btrfs: Fix variables set but not read (bugs found by gcc 4.6)
2010-10-29 15:14:31 -04:00
root-tree.c
Btrfs: cleanup warnings from gcc 4.6 (nonbugs)
2010-10-29 15:14:37 -04:00
struct-funcs.c
Btrfs: Fix checkpatch.pl warnings
2009-01-05 21:25:51 -05:00
super.c
Btrfs: Fix a crash when mounting a subvolume
2010-12-10 16:29:10 -05:00
sysfs.c
Driver core: Constify struct sysfs_ops in struct kobj_type
2010-03-07 17:04:49 -08:00
transaction.c
Btrfs: Add readonly snapshots support
2010-12-23 08:49:17 +08:00
transaction.h
Btrfs: Add readonly snapshots support
2010-12-23 08:49:17 +08:00
tree-defrag.c
Btrfs: cleanup warnings from gcc 4.6 (nonbugs)
2010-10-29 15:14:37 -04:00
tree-log.c
Btrfs: use dget_parent where we can UPDATED
2010-11-21 22:26:09 -05:00
tree-log.h
Btrfs: Metadata ENOSPC handling for tree log
2010-05-25 10:34:53 -04:00
version.h
Update Btrfs files for in-kernel usage
2008-09-25 15:41:59 -04:00
version.sh
Btrfs: Fixes for 2.6.28-rc API changes
2008-11-19 21:17:22 -05:00
volumes.c
Btrfs: account for missing devices in RAID allocation profiles
2010-12-13 20:06:52 -05:00
volumes.h
Btrfs: account for missing devices in RAID allocation profiles
2010-12-13 20:06:52 -05:00
xattr.c
Btrfs: Add readonly snapshots support
2010-12-23 08:49:17 +08:00
xattr.h
btrfs: constify xattr_handler
2010-05-21 18:31:18 -04:00
zlib.c
Btrfs: cleanup warnings from gcc 4.6 (nonbugs)
2010-10-29 15:14:37 -04:00