kernel.git/fs/btrfs/ioctl.h, branch linux-3.2.y

Btrfs: fix the new inspection ioctls for 32 bit compat

2011-11-06T08:08:49Z

The new ioctls to follow backrefs are not clean for 32/64 bit compat. This reworks them for u64s everywhere. They are brand new, so there are no problems with changing the interface now. Signed-off-by: Chris Mason

btrfs: new ioctls to do logical->inode and inode->path resolving

2011-09-29T10:54:28Z

these ioctls make use of the new functions initially added for scrub. they return all inodes belonging to a logical address (BTRFS_IOC_LOGICAL_INO) and all paths belonging to an inode (BTRFS_IOC_INO_PATHS). Signed-off-by: Jan Schmidt

btrfs: added helper functions to iterate backrefs

2011-09-29T10:54:27Z

These helper functions iterate back references and call a function for each backref. There is also a function to resolve an inode to a path in the file system. Signed-off-by: Jan Schmidt

Btrfs: add mount -o auto_defrag

2011-05-26T21:52:15Z

This will detect small random writes into files and queue the up for an auto defrag process. It isn't well suited to database workloads yet, but works for smaller files such as rpm, sqlite or bdb databases. Signed-off-by: Chris Mason

btrfs: add readonly flag

2011-05-12T12:48:31Z

setting the readonly flag prevents writes in case an error is detected Signed-off-by: Arne Jansen

btrfs: new ioctls for scrub

2011-05-12T12:45:38Z

adds ioctls necessary to start and cancel scrubs, to get current progress and to get info about devices to be scrubbed. Note that the scrub is done per-device and that the ioctl only returns after the scrub for this devices is finished or has been canceled. Signed-off-by: Arne Jansen

btrfs: scrub

2011-05-12T12:45:20Z

This adds an initial implementation for scrub. It works quite straightforward. The usermode issues an ioctl for each device in the fs. For each device, it enumerates the allocated device chunks. For each chunk, the contained extents are enumerated and the data checksums fetched. The extents are read sequentially and the checksums verified. If an error occurs (checksum or EIO), a good copy is searched for. If one is found, the bad copy will be rewritten. All enumerations happen from the commit roots. During a transaction commit, the scrubs get paused and afterwards continue from the new roots. This commit is based on the series originally posted to linux-btrfs with some improvements that resulted from comments from David Sterba, Ilya Dryomov and Jan Schmidt. Signed-off-by: Arne Jansen

Merge branch 'lzo-support' of git://repo.or.cz/linux-btrfs-devel into btrfs-38

2011-01-16T16:25:54Z

Btrfs: Add BTRFS_IOC_SUBVOL_GETFLAGS/SETFLAGS ioctls

2010-12-23T00:49:19Z

This allows us to set a snapshot or a subvolume readonly or writable on the fly. Usage: Set BTRFS_SUBVOL_RDONLY of btrfs_ioctl_vol_arg_v2->flags, and then call ioctl(BTRFS_IOCTL_SUBVOL_SETFLAGS); Changelog for v3: - Change to pass __u64 as ioctl parameter. Changelog for v2: - Add _GETFLAGS ioctl. - Check if the passed fd is the root of a subvolume. - Change the name from _SNAP_SETFLAGS to _SUBVOL_SETFLAGS. Signed-off-by: Li Zefan

Btrfs: Add readonly snapshots support

2010-12-23T00:49:17Z

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