- 09 3月, 2010 1 次提交
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由 Josef Bacik 提交于
We kstrdup the options string, but then strsep screws with the pointer, so when we kfree() it, we're not giving it the right pointer. Tested-by: NAndy Lutomirski <luto@mit.edu> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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- 29 1月, 2010 1 次提交
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由 Chris Mason 提交于
The default btrfs mount -o compress mode will quickly back off compressing a file if it notices that compression does not reduce the size of the data being written. This can save considerable CPU because all future writes to the file go through uncompressed. But some files are both very large and have mixed data stored in them. In that case, we want to add the ability to always try compressing data before writing it. This commit adds mount -o compress-force. A later commit will add a new inode flag that does the same thing. Signed-off-by: NChris Mason <chris.mason@oracle.com>
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- 18 12月, 2009 3 次提交
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由 Matthew Wilcox 提交于
Christoph's patch e244a0ae doesn't display the discard option in /proc/mounts, leading to some confusion for me. Here's the missing bit. Signed-off-by: NMatthew Wilcox <willy@linux.intel.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Sage Weil 提交于
We shouldn't silently ignore unrecognized options. Signed-off-by: NSage Weil <sage@newdream.net> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Yan, Zheng 提交于
iput() can trigger new transactions if we are dropping the final reference, so calling it in btrfs_commit_transaction may end up deadlock. This patch adds delayed iput to avoid the issue. Signed-off-by: NYan Zheng <zheng.yan@oracle.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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- 14 10月, 2009 2 次提交
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由 Christoph Hellwig 提交于
Enable discard by default is not a good idea given the the trim speed of SSD prototypes we've seen, and the carecteristics for many high-end arrays. Turn of discards by default and require the -o discard option to enable them on. Signed-off-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Chris Mason 提交于
The btrfs acl code was #ifdefing for a define that didn't exist. This correctly matches it to the values used by the Kconfig file. Signed-off-by: NChris Mason <chris.mason@oracle.com>
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- 30 9月, 2009 1 次提交
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由 Chris Ball 提交于
We currently set sb->s_flags |= MS_POSIXACL unconditionally, which is incorrect -- it tells the VFS that it shouldn't set umask because we will, yet we don't set it ourselves if we aren't using POSIX ACLs, so the umask ends up ignored. Signed-off-by: NChris Ball <cjb@laptop.org> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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- 22 9月, 2009 2 次提交
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由 Alexey Dobriyan 提交于
Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Yan, Zheng 提交于
This patch adds snapshot/subvolume destroy ioctl. A subvolume that isn't being used and doesn't contains links to other subvolumes can be destroyed. Signed-off-by: NYan Zheng <zheng.yan@oracle.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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- 13 7月, 2009 1 次提交
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由 Alexey Dobriyan 提交于
* Remove smp_lock.h from files which don't need it (including some headers!) * Add smp_lock.h to files which do need it * Make smp_lock.h include conditional in hardirq.h It's needed only for one kernel_locked() usage which is under CONFIG_PREEMPT This will make hardirq.h inclusion cheaper for every PREEMPT=n config (which includes allmodconfig/allyesconfig, BTW) Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 12 6月, 2009 2 次提交
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由 Christoph Hellwig 提交于
Make sure a superblock really is writeable by checking MS_RDONLY under s_umount. sync_filesystems needed some re-arragement for that, but all but one sync_filesystem caller had the correct locking already so that we could add that check there. cachefiles grew s_umount locking. I've also added a WARN_ON to sync_filesystem to assert this for future callers. Signed-off-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Christoph Hellwig 提交于
Signed-off-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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- 11 6月, 2009 1 次提交
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由 Chris Mason 提交于
It was printing nodatacsum, which was not the correct option name. Signed-off-by: NChris Mason <chris.mason@oracle.com>
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- 10 6月, 2009 4 次提交
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由 Chris Mason 提交于
During mount, btrfs will check the queue nonrot flag for all the devices found in the FS. If they are all non-rotating, SSD mode is enabled by default. If the FS was mounted with -o nossd, the non-rotating flag is ignored. Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Chris Mason 提交于
Some SSDs perform best when reusing block numbers often, while others perform much better when clustering strictly allocates big chunks of unused space. The default mount -o ssd will find rough groupings of blocks where there are a bunch of free blocks that might have some allocated blocks mixed in. mount -o ssd_spread will make sure there are no allocated blocks mixed in. It should perform better on lower end SSDs. Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Chris Mason 提交于
This allows you to turn off the ssd mode via remount. Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Yan Zheng 提交于
This commit introduces a new kind of back reference for btrfs metadata. Once a filesystem has been mounted with this commit, IT WILL NO LONGER BE MOUNTABLE BY OLDER KERNELS. When a tree block in subvolume tree is cow'd, the reference counts of all extents it points to are increased by one. At transaction commit time, the old root of the subvolume is recorded in a "dead root" data structure, and the btree it points to is later walked, dropping reference counts and freeing any blocks where the reference count goes to 0. The increments done during cow and decrements done after commit cancel out, and the walk is a very expensive way to go about freeing the blocks that are no longer referenced by the new btree root. This commit reduces the transaction overhead by avoiding the need for dead root records. When a non-shared tree block is cow'd, we free the old block at once, and the new block inherits old block's references. When a tree block with reference count > 1 is cow'd, we increase the reference counts of all extents the new block points to by one, and decrease the old block's reference count by one. This dead tree avoidance code removes the need to modify the reference counts of lower level extents when a non-shared tree block is cow'd. But we still need to update back ref for all pointers in the block. This is because the location of the block is recorded in the back ref item. We can solve this by introducing a new type of back ref. The new back ref provides information about pointer's key, level and in which tree the pointer lives. This information allow us to find the pointer by searching the tree. The shortcoming of the new back ref is that it only works for pointers in tree blocks referenced by their owner trees. This is mostly a problem for snapshots, where resolving one of these fuzzy back references would be O(number_of_snapshots) and quite slow. The solution used here is to use the fuzzy back references in the common case where a given tree block is only referenced by one root, and use the full back references when multiple roots have a reference on a given block. This commit adds per subvolume red-black tree to keep trace of cached inodes. The red-black tree helps the balancing code to find cached inodes whose inode numbers within a given range. This commit improves the balancing code by introducing several data structures to keep the state of balancing. The most important one is the back ref cache. It caches how the upper level tree blocks are referenced. This greatly reduce the overhead of checking back ref. The improved balancing code scales significantly better with a large number of snapshots. This is a very large commit and was written in a number of pieces. But, they depend heavily on the disk format change and were squashed together to make sure git bisect didn't end up in a bad state wrt space balancing or the format change. Signed-off-by: NYan Zheng <zheng.yan@oracle.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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- 15 5月, 2009 1 次提交
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由 Sage Weil 提交于
The notreelog and flushoncommit mount options were being printed slightly differently. Signed-off-by: NSage Weil <sage@newdream.net> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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- 09 5月, 2009 1 次提交
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由 Al Viro 提交于
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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- 27 4月, 2009 1 次提交
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由 Joel Becker 提交于
Just happened to notice a bunch of %llu vs u64 warnings. Here's a patch to cast them all. Signed-off-by: NJoel Becker <joel.becker@oracle.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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- 25 4月, 2009 1 次提交
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由 Josef Bacik 提交于
This patch makes the chunk allocator keep a good ratio of metadata vs data block groups. By default for every 8 data block groups, we'll allocate 1 metadata chunk, or about 12% of the disk will be allocated for metadata. This can be changed by specifying the metadata_ratio mount option. This is simply the number of data block groups that have to be allocated to force a metadata chunk allocation. By making sure we allocate metadata chunks more often, we are less likely to get into situations where the whole disk has been allocated as data block groups. Signed-off-by: NJosef Bacik <jbacik@redhat.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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- 21 4月, 2009 1 次提交
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由 Li Zefan 提交于
Remove open-coded memdup_user(). Note this changes some GFP_NOFS to GFP_KERNEL, since copy_from_user() may cause pagefault, it's pointless to pass GFP_NOFS to kmalloc(). Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com> Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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- 03 4月, 2009 3 次提交
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由 Sage Weil 提交于
The 'flushoncommit' mount option forces any data dirtied by a write in a prior transaction to commit as part of the current commit. This makes the committed state a fully consistent view of the file system from the application's perspective (i.e., it includes all completed file system operations). This was previously the behavior only when a snapshot is created. This is used by Ceph to ensure that completed writes make it to the platter along with the metadata operations they are bound to (by BTRFS_IOC_TRANS_{START,END}). Signed-off-by: NSage Weil <sage@newdream.net> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Sage Weil 提交于
Add a 'notreelog' mount option to disable the tree log (used by fsync, O_SYNC writes). This is much slower, but the tree logging produces inconsistent views into the FS for ceph. Signed-off-by: NSage Weil <sage@newdream.net> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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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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