- 03 4月, 2009 1 次提交
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由 Eric Paris 提交于
btrfs options can change at times other than mount, yet /proc/mounts shows the options string used when the fs was mounted (an example would be when btrfs determines that barriers aren't useful and turns them off.) This patch instead outputs the actual options in use by btrfs. Signed-off-by: NEric Paris <eparis@redhat.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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- 12 2月, 2009 2 次提交
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由 Chris Mason 提交于
Cleaning old snapshots can make sync(1) somewhat slow, and some users and applications still use it in a global fsync kind of workload. This patch changes btrfs not to clean old snapshots during sync, which is safe from a FS consistency point of view. The major downside is that it makes it difficult to tell when old snapshots have been reaped and the space they were using has been reclaimed. A new ioctl will be added for this purpose instead. Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Chris Mason 提交于
Btrfs wasn't parsing any new mount options during remount, making it difficult to set mount options on a root drive. Signed-off-by: NChris Mason <chris.mason@oracle.com>
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- 21 1月, 2009 2 次提交
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由 Huang Weiyi 提交于
Removed unused #include <version.h>'s in btrfs Signed-off-by: NHuang Weiyi <weiyi.huang@gmail.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Wang Cong 提交于
- Remove the unused local variable 'len'; - Check return value of kmalloc(). Signed-off-by: NWang Cong <wangcong@zeuux.org> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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- 17 1月, 2009 1 次提交
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由 Chris Mason 提交于
The structure used to send device in btrfs ioctl calls was not properly aligned, and so 32 bit ioctls would not work properly on 64 bit kernels. We could fix this with compat ioctls, but we're just one byte away and it doesn't make sense at this stage to carry about the compat ioctls forever at this stage in the project. This patch brings the ioctl arg up to an evenly aligned 4k. Signed-off-by: NChris Mason <chris.mason@oracle.com>
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- 16 1月, 2009 1 次提交
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由 Qinghuang Feng 提交于
Use the standard magic.h for btrfs and squashfs. Signed-off-by: NQinghuang Feng <qhfeng.kernel@gmail.com> Cc: Phillip Lougher <phillip@lougher.demon.co.uk> Cc: Chris Mason <chris.mason@oracle.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 10 1月, 2009 1 次提交
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由 Linus Torvalds 提交于
Commit c4be0c1d added the ability for write_super_lockfs to return errors, and renamed them to match. But btrfs didn't get converted. Do the minimal conversion to make it compile again. Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 06 1月, 2009 3 次提交
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由 Chris Mason 提交于
There were many, most are fixed now. struct-funcs.c generates some warnings but these are bogus. Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Shen Feng 提交于
subvol_name should be freed if error occurs. Signed-off-by: NShen Feng <shen@cn.fujitsu.com>
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由 Chris Mason 提交于
Only root can add/remove devices Only root can defrag subtrees Only files open for writing can be defragged Only files open for writing can be the destination for a clone Signed-off-by: NChris Mason <chris.mason@oracle.com>
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- 12 12月, 2008 1 次提交
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由 Yan Zheng 提交于
This patch makes seed device possible to be shared by multiple mounted file systems. The sharing is achieved by cloning seed device's btrfs_fs_devices structure. Thanks you, Signed-off-by: NYan Zheng <zheng.yan@oracle.com>
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- 02 12月, 2008 2 次提交
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由 Christoph Hellwig 提交于
Make sure to propagate fmode_t properly and use the right constants for it. Signed-off-by: NChristoph Hellwig <hch@lst.de>
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由 Christoph Hellwig 提交于
Shut up various sparse warnings about symbols that should be either static or have their declarations in scope. Signed-off-by: NChristoph Hellwig <hch@lst.de>
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- 20 11月, 2008 1 次提交
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由 Chris Mason 提交于
The btrfs git kernel trees is used to build a standalone tree for compiling against older kernels. This commit makes the standalone tree work with 2.6.27 Signed-off-by: NChris Mason <chris.mason@oracle.com>
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- 18 11月, 2008 2 次提交
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由 Chris Mason 提交于
Before, all snapshots and subvolumes lived in a single flat directory. This was awkward and confusing because the single flat directory was only writable with the ioctls. This commit changes the ioctls to create subvols and snapshots at any point in the directory tree. This requires making separate ioctls for snapshot and subvol creation instead of a combining them into one. The subvol ioctl does: btrfsctl -S subvol_name parent_dir After the ioctl is done subvol_name lives inside parent_dir. The snapshot ioctl does: btrfsctl -s path_for_snapshot root_to_snapshot path_for_snapshot can be an absolute or relative path. btrfsctl breaks it up into directory and basename components. root_to_snapshot can be any file or directory in the FS. The snapshot is taken of the entire root where that file lives. Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Yan Zheng 提交于
Seed device is a special btrfs with SEEDING super flag set and can only be mounted in read-only mode. Seed devices allow people to create new btrfs on top of it. The new FS contains the same contents as the seed device, but it can be mounted in read-write mode. This patch does the following: 1) split code in btrfs_alloc_chunk into two parts. The first part does makes the newly allocated chunk usable, but does not do any operation that modifies the chunk tree. The second part does the the chunk tree modifications. This division is for the bootstrap step of adding storage to the seed device. 2) Update device management code to handle seed device. The basic idea is: For an FS grown from seed devices, its seed devices are put into a list. Seed devices are opened on demand at mounting time. If any seed device is missing or has been changed, btrfs kernel module will refuse to mount the FS. 3) make btrfs_find_block_group not return NULL when all block groups are read-only. Signed-off-by: NYan Zheng <zheng.yan@oracle.com>
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- 13 11月, 2008 1 次提交
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由 Yan Zheng 提交于
This patch adds mount ro and remount support. The main changes in patch are: adding btrfs_remount and related helper function; splitting the transaction related code out of close_ctree into btrfs_commit_super; updating allocator to properly handle read only block group. Signed-off-by: NYan Zheng <zheng.yan@oracle.com>
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- 07 11月, 2008 1 次提交
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由 Chris Mason 提交于
When reading compressed extents, try to put pages into the page cache for any pages covered by the compressed extent that readpages didn't already preload. Add an async work queue to handle transformations at delayed allocation processing time. Right now this is just compression. The workflow is: 1) Find offsets in the file marked for delayed allocation 2) Lock the pages 3) Lock the state bits 4) Call the async delalloc code The async delalloc code clears the state lock bits and delalloc bits. It is important this happens before the range goes into the work queue because otherwise it might deadlock with other work queue items that try to lock those extent bits. The file pages are compressed, and if the compression doesn't work the pages are written back directly. An ordered work queue is used to make sure the inodes are written in the same order that pdflush or writepages sent them down. This changes extent_write_cache_pages to let the writepage function update the wbc nr_written count. Signed-off-by: NChris Mason <chris.mason@oracle.com>
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- 30 10月, 2008 1 次提交
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由 Chris Mason 提交于
This is a large change for adding compression on reading and writing, both for inline and regular extents. It does some fairly large surgery to the writeback paths. Compression is off by default and enabled by mount -o compress. Even when the -o compress mount option is not used, it is possible to read compressed extents off the disk. If compression for a given set of pages fails to make them smaller, the file is flagged to avoid future compression attempts later. * While finding delalloc extents, the pages are locked before being sent down to the delalloc handler. This allows the delalloc handler to do complex things such as cleaning the pages, marking them writeback and starting IO on their behalf. * Inline extents are inserted at delalloc time now. This allows us to compress the data before inserting the inline extent, and it allows us to insert an inline extent that spans multiple pages. * All of the in-memory extent representations (extent_map.c, ordered-data.c etc) are changed to record both an in-memory size and an on disk size, as well as a flag for compression. From a disk format point of view, the extent pointers in the file are changed to record the on disk size of a given extent and some encoding flags. Space in the disk format is allocated for compression encoding, as well as encryption and a generic 'other' field. Neither the encryption or the 'other' field are currently used. In order to limit the amount of data read for a single random read in the file, the size of a compressed extent is limited to 128k. This is a software only limit, the disk format supports u64 sized compressed extents. In order to limit the ram consumed while processing extents, the uncompressed size of a compressed extent is limited to 256k. This is a software only limit and will be subject to tuning later. Checksumming is still done on compressed extents, and it is done on the uncompressed version of the data. This way additional encodings can be layered on without having to figure out which encoding to checksum. Compression happens at delalloc time, which is basically singled threaded because it is usually done by a single pdflush thread. This makes it tricky to spread the compression load across all the cpus on the box. We'll have to look at parallel pdflush walks of dirty inodes at a later time. Decompression is hooked into readpages and it does spread across CPUs nicely. Signed-off-by: NChris Mason <chris.mason@oracle.com>
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- 30 9月, 2008 1 次提交
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由 Chris Mason 提交于
This improves the comments at the top of many functions. It didn't dive into the guts of functions because I was trying to avoid merging problems with the new allocator and back reference work. extent-tree.c and volumes.c were both skipped, and there is definitely more work todo in cleaning and commenting the code. Signed-off-by: NChris Mason <chris.mason@oracle.com>
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- 26 9月, 2008 1 次提交
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由 Chris Mason 提交于
Btrfs had compatibility code for kernels back to 2.6.18. These have been removed, and will be maintained in a separate backport git tree from now on. Signed-off-by: NChris Mason <chris.mason@oracle.com>
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- 25 9月, 2008 18 次提交
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由 David Woodhouse 提交于
Date: Tue, 19 Aug 2008 16:49:35 +0100 This disappeared when I removed the special case for '.' in btrfs_lookup() Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 David Woodhouse 提交于
Date: Mon, 18 Aug 2008 13:10:20 +0100 This means that subvolumes get a different fsid, and NFS exporting them works properly. Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 David Woodhouse 提交于
Date: Mon, 18 Aug 2008 12:01:52 +0100 Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Balaji Rao 提交于
Date: Mon, 21 Jul 2008 02:01:56 +0530 Here's an implementation of NFS support for btrfs. It relies on the fixes which are going in to 2.6.28 for the NFS readdir/lookup deadlock. This uses the btrfs_iget helper introduced previously. [dwmw2: Tidy up a little, switch to d_obtain_alias() w/compat routine, change fh_type, store parent's root object ID where needed, fix some get_parent() and fs_to_dentry() bugs] Signed-off-by: NBalaji Rao <balajirrao@gmail.com> Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Yan Zheng 提交于
This trivial patch contains two locking fixes and a off by one fix. --- Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Josef Bacik 提交于
Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Chris Mason 提交于
Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Chris Mason 提交于
The btree defragger wasn't making forward progress because the new key wasn't being saved by the btrfs_search_forward function. This also disables the automatic btree defrag, it wasn't scaling well to huge filesystems. The auto-defrag needs to be done differently. Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Chris Mason 提交于
This creates one kthread for commits and one kthread for deleting old snapshots. All the work queues are removed. Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Chris Mason 提交于
Extent alloctions are still protected by a large alloc_mutex. Objectid allocations are covered by a objectid mutex Other btree operations are protected by a lock on individual btree nodes Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Chris Mason 提交于
mount -o thread_pool_size changes the default, which is min(num_cpus + 2, 8). Larger thread pools would make more sense on very large disk arrays. This mount option controls the max size of each thread pool. There are multiple thread pools, so the total worker count will be larger than the mount option. Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Chris Mason 提交于
max_inline=0 used to force the max_inline size to one sector instead. Now it properly disables inline data items, while still being able to read any that happen to exist on disk. Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Christoph Hellwig 提交于
Allows to specify one or multiple device=/dev/foo options during mount so that ioctls on the control device can be avoided. Especially useful when trying to mount a multi-device setup as root. Signed-off-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Christoph Hellwig 提交于
Also adds lots of comments to describe what's going on here. Signed-off-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Sage Weil 提交于
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: NChris Mason <chris.mason@oracle.com>
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由 Linda Knippers 提交于
Send the error back to userland if the ioctl fails Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Mingming 提交于
Use btrfs_release_file instead of a put_inode call Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Chris Mason 提交于
Signed-off-by: NChris Mason <chris.mason@oracle.com>
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