aboutsummaryrefslogtreecommitdiff
path: root/fs/btrfs/super.c
AgeCommit message (Collapse)Author
2008-09-25btrfs: sanity mount option parsing and early mount codeChristoph Hellwig
Also adds lots of comments to describe what's going on here. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: transaction ioctlsSage Weil
These ioctls let a user application hold a transaction open while it performs a series of operations. A final ioctl does a sync on the fs (closing the current transaction). This is the main requirement for Ceph's OSD to be able to keep the data it's storing in a btrfs volume consistent, and AFAICS it works just fine. The application would do something like fd = ::open("some/file", O_RDONLY); ::ioctl(fd, BTRFS_IOC_TRANS_START); /* do a bunch of stuff */ ::ioctl(fd, BTRFS_IOC_TRANS_END); or just ::close(fd); And to ensure it commits to disk, ::ioctl(fd, BTRFS_IOC_SYNC); When a transaction is held open, the trans_handle is attached to the struct file (via private_data) so that it will get cleaned up if the process dies unexpectedly. A held transaction is also ended on fsync() to avoid a deadlock. A misbehaving application could also deliberately hold a transaction open, effectively locking up the FS, so it may make sense to restrict something like this to root or something. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25btrfsctl -A error code fixupLinda Knippers
Send the error back to userland if the ioctl fails Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25btrfs delete ordered inode handling fixMingming
Use btrfs_release_file instead of a put_inode call Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add mount -o degraded to allow mounts to continue with missing devicesChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add support for online device removalChris Mason
This required a few structural changes to the code that manages bdev pointers: The VFS super block now gets an anon-bdev instead of a pointer to the lowest bdev. This allows us to avoid swapping the super block bdev pointer around at run time. The code to read in the super block no longer goes through the extent buffer interface. Things got ugly keeping the mapping constant. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add new ioctl to add devicesChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Fix btrfs_fill_super to return -EINVAL when no FS foundYan
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add support for device scanning and detection ioctlsChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Add /dev/btrfs-control for device scanning ioctlsChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Misc 2.6.25 updatesChris Mason
Remove the btrfs read_inode method, and use save_mount_options Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: mount -o max_inline=size to control the maximum inline extent sizeChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Split the extent_map code into two partsChris Mason
There is now extent_map for mapping offsets in the file to disk and extent_io for state tracking, IO submission and extent_bufers. The new extent_map code shifts from [start,end] pairs to [start,len], and pushes the locking out into the caller. This allows a few performance optimizations and is easier to use. A number of extent_map usage bugs were fixed, mostly with failing to remove extent_map entries when changing the file. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add basic lockfs callsYan
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add mount -o ssd, which includes optimizations for seek free storageChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Run igrab on data=ordered inodes to prevent deadlocks during writeoutChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add drop inode func to avoid data=ordered deadlockChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add flush barriers on commitChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add readahead to the online shrinker, and a mount -o alloc_start= for ↵Chris Mason
testing Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Support for online FS resize (grow and shrink)Chris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Back port to 2.6.18-el kernelsChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add mount option to enforce a max extent sizeChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add mount option to turn off data cowChris Mason
A number of workloads do not require copy on write data or checksumming. mount -o nodatasum to disable checksums and -o nodatacow to disable both copy on write and checksumming. In nodatacow mode, copy on write is still performed when a given extent is under snapshot. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add mount -o nodatasum to turn of file data checksummingChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Return value checking in module initWyatt Banks
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25xattr support for btrfsJosef Bacik
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Allow tails larger than one pageChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Allow tree blocks larger than the page sizeChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Create extent_buffer interface for large blocksizesChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-08-29Btrfs: Use mount -o subvol to select the subvol directory instead of dev:Chris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-08-29Btrfs: Add mount into directory supportYan
Modified form of original patch from Christoph Hellwig to make btrfs mount into the default subvolume by default. mount /dev/somedevice:subvolumename to get other subvolumes or mount /dev/somedevice:. to get the root Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-08-29Btrfs: Add per-root block accounting and sysfs entriesJosef Bacik
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-08-27Btrfs: Add delayed allocation to the extent based page tree codeChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-08-27Btrfs: Extent based page cache code. This uses an rbtree of extents and testsChris Mason
instead of buffer heads. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-08-10Btrfs: Btree defrag on the extent-mapping tree as wellChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-06-26Btrfs: Fix super block updates during transaction commitChris Mason
The super block written during commit was not consistent with the state of the trees. This change adds an in-memory copy of the super so that we can make sure to write out consistent data during a commit. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-06-22Btrfs: Audit callers and return codes to make sure -ENOSPC gets up the stackChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-06-12Btrfs: add GPLv2Chris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-06-12Btrfs: split up super.cChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-06-11Btrfs: fix oops after block group lookupChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-06-09Btrfs: remove device treeChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-06-08Btrfs: add compat ioctlChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-06-07Btrfs: d_type optimizationChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-05-29Btrfs: fixup various fsx failuresChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-05-24Btrfs: sparse files!Chris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-05-24Btrfs: symlinks and hard linksChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-05-23Btrfs: renameChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-05-21Btrfs: 2.6.21-git fixesChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-05-18Btrfs: allocator optimizations, truncate readaheadChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-05-11Btrfs: patch queue: fix corruption when splitting large itemsChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-18 11:03:26 +0000