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* Btrfs: Start btree concurrency work.Chris Mason2008-09-2512-214/+579
| | | | | | | | | | | | | | | The allocation trees and the chunk trees are serialized via their own dedicated mutexes. This means allocation location is still not very fine grained. The main FS btree is protected by locks on each block in the btree. Locks are taken top / down, and as processing finishes on a given level of the tree, the lock is released after locking the lower level. The end result of a search is now a path where only the lowest level is locked. Releasing or freeing the path drops any locks held. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Add a thread pool just for submit_bioChris Mason2008-09-253-1/+10
| | | | | | | | If a bio submission is after a lock holder waiting for the bio on the work queue, it is possible to deadlock. Move the bios into their own pool. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* BTRFS_IOC_TRANS_START should be privileguedChristoph Hellwig2008-09-251-0/+3
| | | | | | | | | As mentioned in the comment next to it btrfs_ioctl_trans_start can do bad damage to filesystems and thus should be limited to privilegued users. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: split out ioctl.cChristoph Hellwig2008-09-254-729/+796
| | | | | | | | Split the ioctl handling out of inode.c into a file of it's own. Also fix up checkpatch.pl warnings for the moved code. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: kerneldoc comments for extent_map.cChristoph Hellwig2008-09-251-12/+49
| | | | | | | Add kerneldoc comments for all exported functions. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Add a mount option to control worker thread pool sizeChris Mason2008-09-253-16/+28
| | | | | | | | | | | | 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: Chris Mason <chris.mason@oracle.com>
* Btrfs: Worker thread optimizationsChris Mason2008-09-252-34/+73
| | | | | | | | | | | | | | | This changes the worker thread pool to maintain a list of idle threads, avoiding a complex search for a good thread to wake up. Threads have two states: idle - we try to reuse the last thread used in hopes of improving the batching ratios busy - each time a new work item is added to a busy task, the task is rotated to the end of the line. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Add backport for the kthread work on kernels older than 2.6.20Chris Mason2008-09-251-1/+8
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Fix mount -o max_inline=0Chris Mason2008-09-251-2/+5
| | | | | | | | 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: Chris Mason <chris.mason@oracle.com>
* Btrfs: Add async worker threads for pre and post IO checksummingChris Mason2008-09-258-132/+626
| | | | | | | | | | | | | | | | | | | | Btrfs has been using workqueues to spread the checksumming load across other CPUs in the system. But, workqueues only schedule work on the same CPU that queued the work, giving them a limited benefit for systems with higher CPU counts. This code adds a generic facility to schedule work with pools of kthreads, and changes the bio submission code to queue bios up. The queueing is important to make sure large numbers of procs on the system don't turn streaming workloads into random workloads by sending IO down concurrently. The end result of all of this is much higher performance (and CPU usage) when doing checksumming on large machines. Two worker pools are created, one for writes and one for endio processing. The two could deadlock if we tried to service both from a single pool. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* btrfs: allow scanning multiple devices during mountChristoph Hellwig2008-09-251-5/+16
| | | | | | | | | 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: Christoph Hellwig <hch@lst.de> Signed-off-by: Chris Mason <chris.mason@oracle.com>
* btrfs: sanity mount option parsing and early mount codeChristoph Hellwig2008-09-253-108/+141
| | | | | | | 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>
* btrfs: fix strange indentation in lookup_extent_mappingChristoph Hellwig2008-09-251-1/+7
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* btrfs: tiny makefile cleanupChristoph Hellwig2008-09-251-7/+1
| | | | | | | | use normal kbuild syntax to build acl.o conditinally and remove comment out lines. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: transaction ioctlsSage Weil2008-09-255-2/+83
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* Btrfs: Dislable acl xattr handlersYan2008-09-251-6/+6
| | | | | | | The acl code is not yet complete, and the xattr handlers are causing problems for cp -p on some distros. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: bdi_init and bdi_destroy come with 2.6.23Jan Engelhardt2008-09-251-3/+3
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* btrfsctl -A error code fixupLinda Knippers2008-09-251-2/+2
| | | | | | Send the error back to userland if the ioctl fails Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Invalidate dcache entry after creating snapshot andSven Wegener2008-09-253-1/+39
| | | | | | | | | | | | | | We need to invalidate an existing dcache entry after creating a new snapshot or subvolume, because a negative dache entry will stop us from accessing the new snapshot or subvolume. --- ctree.h | 23 +++++++++++++++++++++++ inode.c | 4 ++++ transaction.c | 4 ++++ 3 files changed, 31 insertions(+) Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Fix race in running_transaction checksChris Mason2008-09-251-1/+3
| | | | | | | | When a new transaction was started, the code would incorrectly set the pointer in fs_info before all the data structures were setup. fsync heavy workloads hit races on the setup of the ordered inode spinlock Signed-off-by: Chris Mason <chris.mason@oracle.com>
* btrfs delete ordered inode handling fixMingming2008-09-255-32/+23
| | | | | | Use btrfs_release_file instead of a put_inode call Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Always use the async submission queue for checksummed writesChris Mason2008-09-251-7/+0
| | | | | | | This avoids IO stalls and poorly ordered IO from inline writers mixing in with the async submission queue Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Allocator fix variety packChris Mason2008-09-255-97/+209
| | | | | | | | | | | | | | * Force chunk allocation when find_free_extent has to do a full scan * Record the max key at the start of defrag so it doesn't run forever * Block groups might not be contiguous, make a forward search for the next block group in extent-tree.c * Get rid of extra checks for total fs size * Fix relocate_one_reference to avoid relocating the same file data block twice when referenced by an older transaction * Use the open device count when allocating chunks so that we don't try to allocate from devices that don't exist Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Use kzalloc on the fs_devices allocationChris Mason2008-09-251-2/+1
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Handle transid == 0 while opening devicesChris Mason2008-09-251-1/+1
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Enable btree balancing on old kernels againChris Mason2008-09-251-3/+0
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Change the congestion functions to meter the number of async submits ↵Chris Mason2008-09-252-0/+10
| | | | | | | | | as well The async submit workqueue was absorbing too many requests, leading to long stalls where the async submitters were stalling. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Fix corners in writepage and btrfs_truncate_pageChris Mason2008-09-253-15/+17
| | | | | | | | | | | | The extent_io writepage calls needed an extra check for discarding pages that started on th last byte in the file. btrfs_truncate_page needed checks to make sure the page was still part of the file after reading it, and most importantly, needed to wait for all IO to the page to finish before freeing the corresponding extents on disk. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Fix btrfs_open_devices to deal with changes since the scan ioctlsChris Mason2008-09-253-15/+63
| | | | | | | Devices can change after the scan ioctls are done, and btrfs_open_devices needs to be able to verify them as they are opened and used by the FS. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Add mount -o degraded to allow mounts to continue with missing devicesChris Mason2008-09-256-109/+253
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Handle write errors on raid1 and raid10Chris Mason2008-09-259-49/+155
| | | | | | | | | | | | When duplicate copies exist, writes are allowed to fail to one of those copies. This changeset includes a few changes that allow the FS to continue even when some IOs fail. It also adds verification of the parent generation number for btree blocks. This generation is stored in the pointer to a block, and it ensures that missed writes to are detected. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Pass down the expected generation number when reading tree blocksChris Mason2008-09-256-64/+55
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Don't do btree balance_dirty_pages on old kernels, it stalls foreverChris Mason2008-09-251-0/+8
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Chunk relocation fine tuning, and add a few printks to show progressChris Mason2008-09-252-3/+19
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: A number of nodatacow fixesChris Mason2008-09-252-5/+23
| | | | | | | | | | | Once part of a delalloc request fails the cow checks, just cow the entire range It is possible for the back references to all be from the same root, but still have snapshots against an extent. The checks are now more strict, forcing cow any time there are multiple refs against the data extent. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Only open block devices once during mount -o subvol=Chris Mason2008-09-251-0/+3
| | | | | | | btrfs_open_devices needed a check to see if the device was already open. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Update nodatacow mode to support cloned single files and resizingChris Mason2008-09-253-5/+19
| | | | | | | | | | | Before, nodatacow only checked to make sure multiple roots didn't have references on a single extent. This check makes sure that multiple inodes don't have references. nodatacow needed an extra check to see if the block group was currently readonly. This way cows forced by the chunk relocation code are honored. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Properly find the root for snapshotted blocks during chunk relocationChris Mason2008-09-253-12/+156
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Add support for online device removalChris Mason2008-09-258-122/+412
| | | | | | | | | | | | | 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>
* Btrfs: Fix clone ioctl to not hold the path over insertsChris Mason2008-09-251-32/+47
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Silence bogus inode.c compiler warningsChris Mason2008-09-251-2/+2
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Add workaround for AppArmor changing remove_suid()Jeff Mahoney2008-09-252-0/+30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In openSUSE 10.3, AppArmor modifies remove_suid to take a struct path rather than just a dentry. This patch tests that the kernel is openSUSE 10.3 or newer and adjusts the call accordingly. Debian/Ubuntu with AppArmor applied will also need a similar patch. Maintainers of btrfs under those distributions should build on this patch or, alternatively, alter their package descriptions to add -DREMOVE_SUID_PATH to the compiler command line. Signed-off-by: Jeff Mahoney <jeffm@suse.com> - --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ b/compat.h 2008-02-06 16:46:13.000000000 -0500 @@ -0,0 +1,15 @@ +#ifndef _COMPAT_H_ +#define _COMPAT_H_ + + +/* + * Even if AppArmor isn't enabled, it still has different prototypes. + * Add more distro/version pairs here to declare which has AppArmor applied. + */ +#if defined(CONFIG_SUSE_KERNEL) +# if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22) +# define REMOVE_SUID_PATH 1 +# endif +#endif + +#endif /* _COMPAT_H_ */ - --- a/file.c 2008-02-06 11:37:39.000000000 -0500 +++ b/file.c 2008-02-06 16:46:23.000000000 -0500 @@ -37,6 +37,7 @@ #include "ordered-data.h" #include "ioctl.h" #include "print-tree.h" +#include "compat.h" static int btrfs_copy_from_user(loff_t pos, int num_pages, int write_bytes, @@ -790,7 +791,11 @@ static ssize_t btrfs_file_write(struct f goto out_nolock; if (count == 0) goto out_nolock; +#ifdef REMOVE_SUID_PATH + err = remove_suid(&file->f_path); +#else err = remove_suid(fdentry(file)); +#endif if (err) goto out_nolock; file_update_time(file); Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Fix do_sync_file_range ifdefs (2.6.22)Chris Mason2008-09-251-1/+1
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Compile warning fixup in volume.cChris Mason2008-09-251-1/+1
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Clone file data ioctlSage Weil2008-09-255-11/+179
| | | | | | Add a new ioctl to clone file data Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Fixes for 2.6.18 enterprise kernelsChris Mason2008-09-253-7/+26
| | | | | | | | | | | | | | | 2.6.18 seems to get caught in an infinite loop when cancel_rearming_delayed_workqueue is called more than once, so this switches to cancel_delayed_work, which is arguably more correct. Also, balance_dirty_pages can run into problems with 2.6.18 based kernels because it doesn't have the per-bdi dirty limits. This avoids calling balance_dirty_pages on the btree inode unless there is actually something to balance, which is a good optimization in general. Finally there's a compile fix for ordered-data.h Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Tune stripe selection for raid1 and raid10Chris Mason2008-09-251-10/+7
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Deal with failed writes in mirrored configurationsChris Mason2008-09-254-8/+33
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Drop some verbose printksChris Mason2008-09-253-23/+10
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Add balance ioctl to restripe the chunksChris Mason2008-09-255-27/+208
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
generated by cgit v1.1 at 2024-12-27 11:15:57 +0000