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* Btrfs: clean up code for merging extent mapsLi Zefan2011-08-011-38/+21
| | | | | | | | unpin_extent_cache() and add_extent_mapping() shares the same code that merges extent maps. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: clean up code for extent_map lookupLi Zefan2011-08-011-56/+29
| | | | | | | lookup_extent_map() and search_extent_map() can share most of code. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: clean up search_extent_mapping()Li Zefan2011-08-011-14/+3
| | | | | | | | rb_node returned by __tree_search() can be a valid pointer or NULL, but won't be some errno. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
* btrfs: drop gfp parameter from alloc_extent_mapDavid Sterba2011-05-021-3/+2
| | | | | | pass GFP_NOFS directly to kmem_cache_alloc Signed-off-by: David Sterba <dsterba@suse.cz>
* btrfs: drop unused parameter from extent_map_tree_initDavid Sterba2011-05-021-2/+1
| | | | | | | the GFP flags are not stored anywhere and all allocations are done via alloc_extent_map(GFP_NOFS). Signed-off-by: David Sterba <dsterba@suse.cz>
* Fix common misspellingsLucas De Marchi2011-03-311-1/+1
| | | | | | Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
* Btrfs: check return value of alloc_extent_map()Tsutomu Itoh2011-02-141-2/+2
| | | | | | | | | I add the check on the return value of alloc_extent_map() to several places. In addition, alloc_extent_map() returns only the address or NULL. Therefore, check by IS_ERR() is unnecessary. So, I remove IS_ERR() checking. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
* btrfs: Allow to add new compression algorithmLi Zefan2010-12-221-0/+2
| | | | | | | | | | Make the code aware of compression type, instead of always assuming zlib compression. Also make the zlib workspace function as common code for all compression types. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
* Btrfs: Use ERR_CAST helpersJulia Lawall2010-10-291-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use ERR_CAST(x) rather than ERR_PTR(PTR_ERR(x)). The former makes more clear what is the purpose of the operation, which otherwise looks like a no-op. The semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ type T; T x; identifier f; @@ T f (...) { <+... - ERR_PTR(PTR_ERR(x)) + x ...+> } @@ expression x; @@ - ERR_PTR(PTR_ERR(x)) + ERR_CAST(x) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Cc: Chris Mason <chris.mason@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Chris Mason <chris.mason@oracle.com>
* include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo2010-03-301-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstableLinus Torvalds2010-03-081-1/+1
|\ | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable: Btrfs: kfree correct pointer during mount option parsing Btrfs: use RB_ROOT to intialize rb_trees instead of setting rb_node to NULL
| * Btrfs: use RB_ROOT to intialize rb_trees instead of setting rb_node to NULLEric Paris2010-03-081-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | btrfs inialize rb trees in quite a number of places by settin rb_node = NULL; The problem with this is that 17d9ddc72fb8bba0d4f678 in the linux-next tree adds a new field to that struct which needs to be NULL for the new rbtree library code to work properly. This patch uses RB_ROOT as the intializer so all of the relevant fields will be NULL'd. Without the patch I get a panic. Signed-off-by: Eric Paris <eparis@redhat.com> Acked-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
* | Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstableLinus Torvalds2010-01-291-14/+0
|\| | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable: Btrfs: check total number of devices when removing missing Btrfs: check return value of open_bdev_exclusive properly Btrfs: do not mark the chunk as readonly if in degraded mode Btrfs: run orphan cleanup on default fs root Btrfs: fix a memory leak in btrfs_init_acl Btrfs: Use correct values when updating inode i_size on fallocate Btrfs: remove tree_search() in extent_map.c Btrfs: Add mount -o compress-force
| * Btrfs: remove tree_search() in extent_map.cMiao Xie2010-01-281-14/+0
| | | | | | | | | | | | | | | | This patch removes tree_search() in extent_map.c because it is not called by anything. Signed-off-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
* | Merge branch 'for-next' into for-linusJiri Kosina2009-12-071-1/+1
|\ \ | |/ |/| | | | | | | Conflicts: kernel/irq/chip.c
| * tree-wide: fix assorted typos all over the placeAndré Goddard Rosa2009-12-041-1/+1
| | | | | | | | | | | | | | | | | | | | That is "success", "unknown", "through", "performance", "[re|un]mapping" , "access", "default", "reasonable", "[con]currently", "temperature" , "channel", "[un]used", "application", "example","hierarchy", "therefore" , "[over|under]flow", "contiguous", "threshold", "enough" and others. Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* | Btrfs: avoid null deref in unpin_extent_cache()Dan Carpenter2009-11-111-1/+1
|/ | | | | | | | | I re-orderred the checks to avoid dereferencing "em" if it was null. Found by smatch static checker. Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: search for an allocation hint while filling file COWChris Mason2009-09-181-0/+48
| | | | | | | | | | | The allocator has some nice knobs for sending hints about where to try and allocate new blocks, but when we're doing file allocations we're not sending any hint at all. This commit adds a simple extent map search to see if we can quickly and easily find a hint for the allocator. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Fix extent replacment raceChris Mason2009-09-111-0/+50
| | | | | | | | | | | | | | | | | Data COW means that whenever we write to a file, we replace any old extent pointers with new ones. There was a window where a readpage might find the old extent pointers on disk and cache them in the extent_map tree in ram in the middle of a given write replacing them. Even though both the readpage and the write had their respective bytes in the file locked, the extent readpage inserts may cover more bytes than it had locked down. This commit closes the race by keeping the new extent pinned in the extent map tree until after the on-disk btree is properly setup with the new extent pointers. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: switch extent_map to a rw lockChris Mason2009-09-111-4/+1
| | | | | | | | | | | | | | There are two main users of the extent_map tree. The first is regular file inodes, where it is evenly spread between readers and writers. The second is the chunk allocation tree, which maps blocks from logical addresses to phyiscal ones, and it is 99.99% reads. The mapping tree is a point of lock contention during heavy IO workloads, so this commit switches things to a rw lock. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: kill btrfs_cache_createChristoph Hellwig2009-04-241-8/+3
| | | | | | | Just use kmem_cache_create directly. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: don't export symbolsChristoph Hellwig2009-04-241-6/+0
| | | | | | | | Currently the extent_map code is only for btrfs so don't export it's symbols. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: remove dead codeDan Carpenter2009-04-021-1/+0
| | | | | | | | merge is always NULL at this point. Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: removed unused #include <version.h>'sHuang Weiyi2009-01-211-1/+0
| | | | | | | | Removed unused #include <version.h>'s in btrfs Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Fix checkpatch.pl warningsChris Mason2009-01-051-7/+7
| | | | | | | There were many, most are fixed now. struct-funcs.c generates some warnings but these are bogus. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Add zlib compression supportChris Mason2008-10-291-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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: Chris Mason <chris.mason@oracle.com>
* Btrfs: add and improve commentsChris Mason2008-09-291-0/+10
| | | | | | | | | | | 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: Chris Mason <chris.mason@oracle.com>
* Btrfs: Fix add_extent_mapping to check for duplicates across the whole rangeChris Mason2008-09-251-0/+7
| | | | | | | | | | | | 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: Chris Mason <chris.mason@oracle.com>
* Btrfs: Use assert_spin_locked instead of spin_trylockDavid Woodhouse2008-09-251-3/+3
| | | | | | On UP systems spin_trylock always succeeds Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Fix some data=ordered related data corruptionsChris Mason2008-09-251-9/+0
| | | | | | | | | | | | | | | | | | Stress testing was showing data checksum errors, most of which were caused by a lookup bug in the extent_map tree. The tree was caching the last pointer returned, and searches would check the last pointer first. But, search callers also expect the search to return the very first matching extent in the range, which wasn't always true with the last pointer usage. For now, the code to cache the last return value is just removed. It is easy to fix, but I think lookups are rare enough that it isn't required anymore. This commit also replaces do_sync_mapping_range with a local copy of the related functions. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Keep extent mappings in ram until pending ordered extents are doneChris Mason2008-09-251-0/+4
| | | | | | | | It was possible for stale mappings from disk to be used instead of the new pending ordered extent. This adds a flag to the extent map struct to keep it pinned until the pending ordered extent is actually on disk. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: New data=ordered implementationChris Mason2008-09-251-1/+4
| | | | | | | | | | | | | | | | | | | | | | | | The old data=ordered code would force commit to wait until all the data extents from the transaction were fully on disk. This introduced large latencies into the commit and stalled new writers in the transaction for a long time. The new code changes the way data allocations and extents work: * When delayed allocation is filled, data extents are reserved, and the extent bit EXTENT_ORDERED is set on the entire range of the extent. A struct btrfs_ordered_extent is allocated an inserted into a per-inode rbtree to track the pending extents. * As each page is written EXTENT_ORDERED is cleared on the bytes corresponding to that page. * When all of the bytes corresponding to a single struct btrfs_ordered_extent are written, The previously reserved extent is inserted into the FS btree and into the extent allocation trees. The checksums for the file data are also updated. 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: fix strange indentation in lookup_extent_mappingChristoph Hellwig2008-09-251-1/+7
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Split the extent_map code into two partsChris Mason2008-09-251-3035/+84
| | | | | | | | | | | | | | There is now extent_map for mapping offsets in the file to disk and extent_io for state tracking, IO submission and extent_bufers. The new extent_map code shifts from [start,end] pairs to [start,len], and pushes the locking out into the caller. This allows a few performance optimizations and is easier to use. A number of extent_map usage bugs were fixed, mostly with failing to remove extent_map entries when changing the file. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Fix hole insertion corner casesChris Mason2008-09-251-9/+36
| | | | | | | | | | There were a few places that could cause duplicate extent insertion, this adjusts the code that creates holes to avoid it. lookup_extent_map is changed to correctly return all of the extents in a range, even when there are none matching at the start of the range. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Fix for test_range_bitYan2008-09-251-0/+5
| | | | | | | test_range_bit doesn't properly handle the case: there's a hole at the end of the range and there's no other extent_state after the range. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Remove verbose WARN_ONChris Mason2008-09-251-2/+0
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Fix extent_buffer usage when nodesize != leafsizeChris Mason2008-09-251-9/+21
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Remove extent_map debugging messageChris Mason2008-09-251-1/+0
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Fix an off by one in the extent_map prepare write codeChris Mason2008-09-251-2/+2
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Implement basic support for -ENOSPCChris Mason2008-09-251-6/+14
| | | | | | | | | | This is intended to prevent accidentally filling the drive. A determined user can still make things oops. It includes some accounting of the current bytes under delayed allocation, but this will change as things get optimized Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Fix delayed allocation to avoid missing delalloc extentsChris Mason2008-09-251-2/+7
| | | | | | find_lock_delalloc_range could exit out too early Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Back port to 2.6.18-el kernelsChris Mason2008-09-251-8/+160
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: section mismatch warningsChristian Hesse2008-09-251-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | --Boundary-00=_CcOWHFYK4T+JwSj Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Hello everybody, compiling btrfs into the kernel results in section mismatch warnings. __exit functions are called where they are not allowed to. The attached patch fixes this for me. Not sure if it is correct though. Signed-off-by: Christian Hesse <mail@earthworm.de> -- Regards, Chris --Boundary-00=_CcOWHFYK4T+JwSj Content-Type: text/x-diff; charset="iso-8859-1"; name="btrfs-section_mismatches.patch" Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="btrfs-section_mismatches.patch" Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Add efficient dirty accounting to the extent_map treeChris Mason2008-09-251-3/+29
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Limit btree writeback to prevent seeksChris Mason2008-09-251-0/+39
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Handle writeback under high memory pressure betterChris Mason2008-09-251-0/+12
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Make sure page mapping dirty tag is properly clearedChris Mason2008-09-251-2/+20
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Avoid fragmentation from parallel delalloc fillingChris Mason2008-09-251-34/+49
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-29 05:46:51 +0000