- 25 Sep, 2008 40 commits
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Chris Mason authored
File syncs and directory syncs are optimized by copying their items into a special (copy-on-write) log tree. There is one log tree per subvolume and the btrfs super block points to a tree of log tree roots. After a crash, items are copied out of the log tree and back into the subvolume. See tree-log.c for all the details. Signed-off-by:Chris Mason <chris.mason@oracle.com>
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Chris Mason authored
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Christoph Hellwig authored
btrfs actually stores the whole xattr name, including the prefix ondisk, so using the generic resolver that strips off the prefix is not very helpful. Instead do the real ondisk xattrs manually and only use the generic resolver for synthetic xattrs like ACLs. (Sorry Josef for guiding you towards the wrong direction here intially) Signed-off-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
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Christoph Hellwig authored
The ->list handler is really not useful at all, because we always call btrfs_xattr_generic_list anyway. After this is done find_btrfs_xattr_handler becomes unused, and it becomes obvious that the temporary name buffer allocation isn't needed but we can directly copy into the supplied buffer. Tested with various getfattr -d calls on varying xattr lists. Signed-off-by:
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Josef Bacik authored
This patch makes btrfs so it will compile properly when acls are disabled. I tested this and it worked with CONFIG_FS_POSIX_ACL off and on. Signed-off-by: -
Chris Mason authored
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Chris Mason authored
The current code waits for the count of async bio submits to get below a given threshold if it is too high right after adding the latest bio to the work queue. This isn't optimal because the caller may have sequential adjacent bios pending they are waiting to send down the pipe. This changeset requires the caller to wait on the async bio count, and changes the async checksumming submits to wait for async bios any time they self throttle. The end result is much higher sequential throughput. Signed-off-by: -
Chris Mason authored
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David Woodhouse authored
Date: Tue, 19 Aug 2008 22:33:04 +0100 Signed-off-by:
David Woodhouse <David.Woodhouse@intel.com> Signed-off-by:
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David Woodhouse authored
Date: Tue, 19 Aug 2008 22:20:17 +0100 btrfs_lookup_fs_root() only finds subvol roots which have already been seen and put into the cache. For btrfs_get_dentry() we actually have to go to the medium -- so use btrfs_read_fs_root_no_name() instead. In btrfs_get_parent(), notice when we've hit the root of the subvolume and return the real root instead. Signed-off-by:
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David Woodhouse authored
Date: Tue, 19 Aug 2008 19:21:57 +0100 Using a 64-bit hash as the readdir cookie is just asking for trouble. And gets it, when we try to export the file system by NFS. Signed-off-by:
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David Woodhouse authored
Date: Tue, 19 Aug 2008 16:49:35 +0100 This disappeared when I removed the special case for '.' in btrfs_lookup() Signed-off-by:
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David Woodhouse authored
Date: Mon, 18 Aug 2008 22:50:22 +0100 Signed-off-by:
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David Woodhouse authored
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:
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David Woodhouse authored
Date: Mon, 18 Aug 2008 12:01:52 +0100 Signed-off-by:
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David Woodhouse authored
Date: Sun, 17 Aug 2008 17:12:56 +0100 Signed-off-by:
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David Woodhouse authored
Date: Sun, 17 Aug 2008 17:08:36 +0100 Signed-off-by:
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David Woodhouse authored
Date: Sun, 17 Aug 2008 15:14:48 +0100 We never get asked by the VFS to lookup either of them, and we can handle the readdir() case a lot more simply, too. Signed-off-by:
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David Woodhouse authored
Date: Tue, 12 Aug 2008 14:13:26 +0100 Signed-off-by:
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David Woodhouse authored
Date: Wed, 6 Aug 2008 19:42:33 +0100 Signed-off-by:
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Balaji Rao authored
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:
Balaji Rao <balajirrao@gmail.com> Signed-off-by:
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Balaji Rao authored
Date: Mon, 21 Jul 2008 02:01:04 +0530 This patch introduces a btrfs_iget helper to be used in NFS support. Signed-off-by:
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Chris Mason authored
Before, the btrfs bdi congestion function was used to test for too many async bios. This keeps that check to throttle pdflush, but also adds a check while queuing bios. Signed-off-by: -
Chris Mason authored
This optimization had been removed because I thought it was triggering csum errors. The real cause of the errors was elsewhere, and so this optimization is back. Signed-off-by: -
Chris Mason authored
add_extent_mapping was allowing the insertion of overlapping extents. This never used to happen because it only inserted the extents from disk and those were never overlapping. But, with the data=ordered code, the disk and memory representations of the file are not the same. add_extent_mapping needs to ensure a new extent does not overlap before it inserts. Signed-off-by: -
David Woodhouse authored
These ended up freeing objects while they were still using them. Under guidance from Chris, just rip out the 'clever' bits and do things the simple way. Signed-off-by:
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Chris Mason authored
This takes the csum mutex deeper in the call chain and releases it more often. Signed-off-by: -
Chris Mason authored
Before this change, btrfs would use a bdi congestion function to make sure there weren't too many pending async checksum work items. This change makes the process creating async work items wait instead, leading to fewer congestion returns from the bdi. This improves pdflush background_writeout scanning. Signed-off-by: -
Chris Mason authored
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Chris Mason authored
After writing out all the remaining btree blocks in the transaction, the commit code would use filemap_fdatawait to make sure it was all on disk. This means it would wait for blocks written by other procs as well. The new code walks the list of blocks for this transaction again and waits only for those required by this transaction. Signed-off-by: -
Chris Mason authored
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Chris Mason authored
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Chris Mason authored
The writeback_index field is used by write_cache_pages to pick up where writeback on a given inode left off. But, it is never set to a sane value, so writeback can often start at a random offset in the file. Kernels 2.6.28 and higher will have this fixed, but for everyone else, we also fill in the value in btrfs. Signed-off-by: -
David Woodhouse authored
Add backwards compatibility in compat.h Signed-off-by:
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Eric Sandeen authored
Newer RHEL5 kernels define both ClearPageFSMisc and ClearPageChecked, so test for both before redefining. Signed-off-by:
Eric Sandeen <sandeen@redhat.com> --- Signed-off-by:
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Chris Mason authored
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Chris Mason authored
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Yan Zheng authored
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Chris Mason authored
rename and link don't always have a lock on the source inode, and our use of a per-inode index variable was racy. This changes things to store the index in a local variable instead. Signed-off-by: -
Chris Mason authored
The multi-bio code is responsible for duplicating blocks in raid1 and single spindle duplication. It has counters to make sure all of the locations for a given extent are properly written before io completion is returned to the higher layers. But, it didn't always complete the same bio it was given, sometimes a clone was completed instead. This lead to problems with the async work queues because they saved a pointer to the bio in a struct off bi_private. The fix is to remember the original bio and only complete that one. Signed-off-by:
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