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