- 25 4月, 2011 7 次提交
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由 Li Zefan 提交于
This is similar to block group caching. We dedicate a special inode in fs tree to save free ino cache. At the very first time we create/delete a file after mount, the free ino cache will be loaded from disk into memory. When the fs tree is commited, the cache will be written back to disk. To keep compatibility, we check the root generation against the generation of the special inode when loading the cache, so the loading will fail if the btrfs filesystem was mounted in an older kernel before. Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com>
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由 Li Zefan 提交于
There's a potential problem in 32bit system when we exhaust 32bit inode numbers and start to allocate big inode numbers, because btrfs uses inode->i_ino in many places. So here we always use BTRFS_I(inode)->location.objectid, which is an u64 variable. There are 2 exceptions that BTRFS_I(inode)->location.objectid != inode->i_ino: the btree inode (0 vs 1) and empty subvol dirs (256 vs 2), and inode->i_ino will be used in those cases. Another reason to make this change is I'm going to use a special inode to save free ino cache, and the inode number must be > (u64)-256. Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com>
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由 Li Zefan 提交于
Extract out block group specific code from lookup_free_space_inode(), create_free_space_inode(), load_free_space_cache() and btrfs_write_out_cache(), so the code can be used to read/write free ino cache. Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com>
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由 Li Zefan 提交于
Currently btrfs stores the highest objectid of the fs tree, and it always returns (highest+1) inode number when we create a file, so inode numbers won't be reclaimed when we delete files, so we'll run out of inode numbers as we keep create/delete files in 32bits machines. This fixes it, and it works similarly to how we cache free space in block cgroups. We start a kernel thread to read the file tree. By scanning inode items, we know which chunks of inode numbers are free, and we cache them in an rb-tree. Because we are searching the commit root, we have to carefully handle the cross-transaction case. The rb-tree is a hybrid extent+bitmap tree, so if we have too many small chunks of inode numbers, we'll use bitmaps. Initially we allow 16K ram of extents, and a bitmap will be used if we exceed this threshold. The extents threshold is adjusted in runtime. Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com>
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由 Li Zefan 提交于
So we can re-use the code to cache free inode numbers. The change is quite straightforward. Two new structures are introduced. - struct btrfs_free_space_ctl We move those variables that are used for caching free space from struct btrfs_block_group_cache to this new struct. - struct btrfs_free_space_op We do block group specific work (e.g. calculation of extents threshold) through functions registered in this struct. And then we can remove references to struct btrfs_block_group_cache. Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com>
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由 Li Zefan 提交于
No functional change. Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com>
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由 Li Zefan 提交于
We've already recorded the value in block_group->frees_space. Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com>
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- 18 4月, 2011 1 次提交
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由 Chris Mason 提交于
The free space caching code was recently reworked to cache all the pages it needed instead of using find_get_page everywhere. One loop was missed though, so it ended up leaking pages. This fixes it to use our page array instead of find_get_page. Signed-off-by: NChris Mason <chris.mason@oracle.com>
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- 16 4月, 2011 3 次提交
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由 Josef Bacik 提交于
Everytime we try to allocate disk space we try and see if we can pre-emptively allocate a chunk, but in the common case we don't allocate anything, so there is no sense in taking the chunk_mutex at all. So instead if we are allocating a chunk, mark it in the space_info so we don't get two people trying to allocate at the same time. Thanks, Signed-off-by: NJosef Bacik <josef@redhat.com> Reviewed-by: NLiu Bo <liubo2009@cn.fujitsu.com>
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由 Chris Mason 提交于
A recent commit caches the extent state in end_bio_extent_readpage, but the search it does should look for locked extents. This fixes things to make it more effective. Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Chris Mason 提交于
find_free_extent likes to allocate in contiguous clusters, which makes writeback faster, especially on SSD storage. As the FS fragments, these clusters become harder to find and we have to decide between allocating a new chunk to make more clusters or giving up on the cluster to allocate from the free space we have. Right now it creates too many chunks, and you can end up with a whole FS that is mostly empty metadata chunks. This commit changes the allocation code to be more strict and only allocate new chunks when we've made good use of the chunks we already have. Signed-off-by: NChris Mason <chris.mason@oracle.com>
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- 13 4月, 2011 5 次提交
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由 Miao Xie 提交于
Call posix_acl_valid() to check if an acl is valid or not. Signed-off-by: NMiao Xie <miaox@cn.fujitsu.com> Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com>
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由 Miao Xie 提交于
Link count of the inode is not decreased if btrfs_set_inode_index() fails. Signed-off-by: NMiao Xie <miaox@cn.fujitsu.com> Singed-off-by: NLi Zefan <lizf@cn.fujitsu.com>
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由 Li Zefan 提交于
btrfs_next_leaf() can return -errno, and we should propagate it to userspace. This also simplifies how we walk the btree path. Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com>
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由 Li Zefan 提交于
btrfs_next_leaf() can return -errno, and we should propagate it to userspace. This also simplifies how we walk the btree path. Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com>
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由 Chris Mason 提交于
The extent_io code can take cached pointers into the extent state trees, and these can make lookups much faster in common operations. The caching only happens when specific bits are set that prevent merging and splitting of the extent state. A help function was added to uncache the state, and it was testing the same set of conditionals. This can leak in very strange corner cases where the lock bit goes away unexpectedly. The uncaching should be unconditional. Once we have a ref on the extent we should always give it up. Signed-off-by: NChris Mason <chris.mason@oracle.com>
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- 12 4月, 2011 8 次提交
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由 Chris Mason 提交于
Merge branch 'for-chris' of git://git.kernel.org/pub/scm/linux/kernel/git/josef/btrfs-work into for-linus
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由 Arne Jansen 提交于
In several places the sequence (set_extent_uptodate, unlock_extent) is used. This leads to a duplicate lookup of the extent state. This patch lets set_extent_uptodate return a cached extent_state which can be passed to unlock_extent_cached. The occurences of the above sequences are updated to use the cache. Only end_bio_extent_readpage is updated that it first gets a cached state to pass it to the readpage_end_io_hook as the prototype requested and is later on being used for set/unlock. Signed-off-by: NArne Jansen <sensille@gmx.net> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Josef Bacik 提交于
I've been working on making our O_DIRECT latency not suck and I noticed we were taking the trans_mutex in btrfs_end_transaction. So to do this we convert num_writers and use_count to atomic_t's and just decrement them in btrfs_end_transaction. Instead of deleting the transaction from the trans list in put_transaction we do that in btrfs_commit_transaction() since that's the only time it actually needs to be removed from the list. Thanks, Signed-off-by: NJosef Bacik <josef@redhat.com>
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由 Xin Zhong 提交于
We create two subvolumes (meego_root and meego_home) in btrfs root directory. And set meego_root as default mount subvolume. After we remount btrfs, meego_root is mounted to top directory by default. Then when we try to mount meego_home (subvol=meego_home) to a subdirectory, it failed. The problem is when default mount subvolume is set to meego_root, we search meego_home in meego_root but can not find it. So the solution is to add a new mount option (subvolrootid) to specify subvol id of root and search subvol name in it. For our case, now we can use "-o subvolrootid=0,subvol=meego_home) to mount meego_home. Detail information can be found in meego bugzilla: https://bugs.meego.com/show_bug.cgi?id=15055Signed-off-by: NZhong, Xin <xin.zhong@intel.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Daniel J Blueman 提交于
Fix address space annotation correct in ioctl.c. Signed-off-by: NDaniel J Blueman <daniel.blueman@gmail.com> BTRFS_BLOCK_GROUP_SYSTEM, @@ -2387,7 +2387,7 @@ long btrfs_ioctl_space_info(struct btrfs_root *root, void __user *arg) up_read(&info->groups_sem); } - user_dest = (struct btrfs_ioctl_space_info *) + user_dest = (struct btrfs_ioctl_space_info __user *) (arg + sizeof(struct btrfs_ioctl_space_args)); if (copy_to_user(user_dest, dest_orig, alloc_size)) Reviewed-by: NJosef Bacik <josef@redhat.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Josef Bacik 提交于
Apparently it is ok to submit a read to an IDE device with the same target page for different offsets. This is what Windows does under qemu. The problem is under DIO we expect them to be different buffers for checksumming reasons, and so this sort of thing will result in checksum errors, when in reality the file is fine. So when reading, check to make sure that all iov bases are different, and if they aren't fall back to buffered mode, since that will work out right. Thanks, Signed-off-by: NJosef Bacik <josef@redhat.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Sergei Trofimovich 提交于
Fix data corruption caused by memcpy() usage on overlapping data. I've observed it first when found out usermode linux crash on btrfs. ?all chain is the following: ------------[ cut here ]------------ WARNING: at /home/slyfox/linux-2.6/fs/btrfs/extent_io.c:3900 memcpy_extent_buffer+0x1a5/0x219() Call Trace: 6fa39a58: [<601b495e>] _raw_spin_unlock_irqrestore+0x18/0x1c 6fa39a68: [<60029ad9>] warn_slowpath_common+0x59/0x70 6fa39aa8: [<60029b05>] warn_slowpath_null+0x15/0x17 6fa39ab8: [<600efc97>] memcpy_extent_buffer+0x1a5/0x219 6fa39b48: [<600efd9f>] memmove_extent_buffer+0x94/0x208 6fa39bc8: [<600becbf>] btrfs_del_items+0x214/0x473 6fa39c78: [<600ce1b0>] btrfs_delete_one_dir_name+0x7c/0xda 6fa39cc8: [<600dad6b>] __btrfs_unlink_inode+0xad/0x25d 6fa39d08: [<600d7864>] btrfs_start_transaction+0xe/0x10 6fa39d48: [<600dc9ff>] btrfs_unlink_inode+0x1b/0x3b 6fa39d78: [<600e04bc>] btrfs_unlink+0x70/0xef 6fa39dc8: [<6007f0d0>] vfs_unlink+0x58/0xa3 6fa39df8: [<60080278>] do_unlinkat+0xd4/0x162 6fa39e48: [<600517db>] call_rcu_sched+0xe/0x10 6fa39e58: [<600452a8>] __put_cred+0x58/0x5a 6fa39e78: [<6007446c>] sys_faccessat+0x154/0x166 6fa39ed8: [<60080317>] sys_unlink+0x11/0x13 6fa39ee8: [<60016b80>] handle_syscall+0x58/0x70 6fa39f08: [<60021377>] userspace+0x2d4/0x381 6fa39fc8: [<60014507>] fork_handler+0x62/0x69 ---[ end trace 70b0ca2ef0266b93 ]--- http://www.mail-archive.com/linux-btrfs@vger.kernel.org/msg09302.htmlSigned-off-by: NSergei Trofimovich <slyfox@gentoo.org> Reviewed-by: NJosef Bacik <josef@redhat.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Yoshinori Sano 提交于
This patch fixes memory leaks in btrfs_new_inode(). Signed-off-by: NYoshinori Sano <yoshinori.sano@gmail.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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- 09 4月, 2011 8 次提交
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由 Josef Bacik 提交于
Apparently it is ok to submit a read to an IDE device with the same target page for different offsets. This is what Windows does under qemu. The problem is under DIO we expect them to be different buffers for checksumming reasons, and so this sort of thing will result in checksum errors, when in reality the file is fine. So when reading, check to make sure that all iov bases are different, and if they aren't fall back to buffered mode, since that will work out right. Thanks, Signed-off-by: NJosef Bacik <josef@redhat.com>
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由 Josef Bacik 提交于
In btrfs_get_block_direct we call btrfs_get_extent to lookup the extent for the range that we are looking for. If we don't find an extent, btrfs_get_extent will insert a extent_map for that area and mark it as a hole. So it does the job of allocating a new extent map and inserting it into the io tree. But if we're creating a new extent we free it up and redo all of that work. So instead pass the em to btrfs_new_extent_direct(), and if it will work just allocate the disk space and set it up properly and bypass the freeing/allocating of a new extent map and the expensive operation of inserting the thing into the io_tree. Thanks, Signed-off-by: NJosef Bacik <josef@redhat.com>
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由 Josef Bacik 提交于
When looking at our DIO performance Chris said that for small IO's doing the async submit stuff tends to be more overhead than it's worth. With this on top of my other fixes I get about a 17-20% speedup doing a sequential dd with 4k IO's. Basically if we don't have to split the bio for the map length it's small enough to be directly submitted, otherwise go back to the async submit. Thanks, Signed-off-by: NJosef Bacik <josef@redhat.com>
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由 Josef Bacik 提交于
We have been unconditionally allocating a new bio and re-adding all pages from our original bio to the new bio. This is needed if our original bio is larger than our stripe size, but if it is smaller than the stripe size then there is no need to do this. So check the map length and if we are under that then go ahead and submit the original bio. Thanks, Signed-off-by: NJosef Bacik <josef@redhat.com>
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由 Josef Bacik 提交于
In the DIO code we often don't update the i_disk_size because the i_size isn't updated until after the DIO is completed, so basically we are allocating a path, doing a search, and updating the inode item for no reason since nothing changed. btrfs_ordered_update_i_size will return 1 if it didn't update i_disk_size, so only run btrfs_update_inode if btrfs_ordered_update_i_size returns 0. Thanks, Signed-off-by: NJosef Bacik <josef@redhat.com>
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由 Josef Bacik 提交于
Instead of calling kmap_atomic for every thing we set in the inode item, map the entire inode item at the start and unmap it at the end. This makes a sequential dd of 400mb O_DIRECT something like 1% faster. Thanks, Signed-off-by: NJosef Bacik <josef@redhat.com>
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由 Josef Bacik 提交于
I saw a lockup where we kept getting into this start transaction->commit transaction loop because of enospce. The fact is if we fail to make our reservation, we've tried _everything_ several times, so we only need to try and commit the transaction once, and if that doesn't work then we really are out of space and need to just exit. Thanks, Signed-off-by: NJosef Bacik <josef@redhat.com>
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由 Josef Bacik 提交于
Currently we don't handle running out of space in the cache, so to fix this we keep track of how far in the cache we are. Then we only dirty the pages if we successfully modify all of them, otherwise if we have an error or run out of space we can just drop them and not worry about the vm writing them out. Thanks, Tested-by Johannes Hirte <johannes.hirte@fem.tu-ilmenau.de> Signed-off-by: NJosef Bacik <josef@redhat.com>
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- 05 4月, 2011 8 次提交
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由 Josef Bacik 提交于
When I moved the orphan adding to btrfs_truncate I missed the fact that during orphan cleanup we just add the orphan items to the orphan list without going through btrfs_orphan_add, which results in lots of warnings on mount if you have any orphan items that need to be truncated. Just remove this warning since it's ok, this will allow all of the normal space accounting take place. Thanks, Signed-off-by: NJosef Bacik <josef@redhat.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Josef Bacik 提交于
I noticed a huge problem with the free space cache that was presenting as an early ENOSPC. Turns out when writing the free space cache out I forgot to take into account pinned extents and more importantly clusters. This would result in us leaking free space everytime we unmounted the filesystem and remounted it. I fix this by making sure to check and see if the current block group has a cluster and writing out any entries that are in the cluster to the cache, as well as writing any pinned extents we currently have to the cache since those will be available for us to use the next time the fs mounts. This patch also adds a check to the end of load_free_space_cache to make sure we got the right amount of free space cache, and if not make sure to clear the cache and re-cache the old fashioned way. Signed-off-by: NJosef Bacik <josef@redhat.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Li Zefan 提交于
root_item->flags and root_item->byte_limit are not initialized when a subvolume is created. This bug is not revealed until we added readonly snapshot support - now you mount a btrfs filesystem and you may find the subvolumes in it are readonly. To work around this problem, we steal a bit from root_item->inode_item->flags, and use it to indicate if those fields have been properly initialized. When we read a tree root from disk, we check if the bit is set, and if not we'll set the flag and initialize the two fields of the root item. Reported-by: NAndreas Philipp <philipp.andreas@gmail.com> Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com> Tested-by: NAndreas Philipp <philipp.andreas@gmail.com> cc: stable@kernel.org Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Miao Xie 提交于
the object id of the space cache inode's key is allocated from the relative root, just like the regular file. So we can't identify space cache inode by checking the object id of the inode's key, and we have to clear __GFP_FS flag at the time we look up the space cache inode. Signed-off-by: NMiao Xie <miaox@cn.fujitsu.com> Signed-off-by: NLiu Bo <liubo2009@cn.fujitsu.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Yoshinori Sano 提交于
Free btrfs_trans_handle when join_transaction() fails in start_transaction() Signed-off-by: NYoshinori Sano <yoshinori.sano@gmail.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Tsutomu Itoh 提交于
Call btrfs_end_transaction() if btrfs_commit_transaction_async() fails. Signed-off-by: NTsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Johann Lombardi 提交于
btrfs_rename() does not release the subvol_sem if the transaction failed to start. Signed-off-by: NJohann Lombardi <johann@whamcloud.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Li Zefan 提交于
When we defrag a file, whose size can be fit into an inline extent, with compression enabled, the compress type is set to be fs_info->compress_type, which is 0 if the btrfs filesystem is mounted without compress option. This leads to oops. Reported-by: NDaniel Blueman <daniel.blueman@gmail.com> Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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