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* nilfs2: replace mark_inode_dirty as nilfs_mark_inode_dirtyJiro SEKIBA2009-11-273-20/+20
| | | | | | | | Replace mark_inode_dirty() as nilfs_mark_inode_dirty() to reduce deep function calls. Signed-off-by: Jiro SEKIBA <jir@unicus.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: delete mark_inode_dirty in nilfs_delete_entryJiro SEKIBA2009-11-272-2/+2
| | | | | | | | Delete mark_inode_dirty() in nilfs_delete_entry() to reduce duplicate mark_inode_dirty() calls both in nilfs_rename() and nilfs_delete_entry(). Signed-off-by: Jiro SEKIBA <jir@unicus.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: delete mark_inode_dirty in nilfs_commit_chunkJiro SEKIBA2009-11-272-4/+2
| | | | | | | | | Delete mark_inode_dirty() in nilfs_commit_chunk(), for callers of nilfs_commit_chunk() will call equivalent mark_inode_dirty() after calling nilfs_commit_chunk(). Signed-off-by: Jiro SEKIBA <jir@unicus.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: change return type of nilfs_commit_chunkJiro SEKIBA2009-11-271-8/+8
| | | | | | | | | | | change return type of nilfs_commit_chunk() as void from int, for nilfs_set_file_dirty() usually does not return error. This is an intermediate patch to reduce mark_inode_dirty() in nilfs_commit_chunk(). Signed-off-by: Jiro SEKIBA <jir@unicus.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: split nilfs_unlink as nilfs_do_unlink and nilfs_unlinkJiro SEKIBA2009-11-271-10/+19
| | | | | | | | | | | | | | Split nilfs_unlink() to reduce nested transaction and duplicate mark_inode_dirty() calls when calling nilfs_unlink() from nilfs_rmdir(). nilfs_do_unlink() is an actual unlink functionality which is not in transaction and does not call mark_inode_dirty() for dentry argument. nilfs_unlink() is a wrapper function for do_nilfs_unlink() with transaction and mark_inode_dirty() for dentry argument. Signed-off-by: Jiro SEKIBA <jir@unicus.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: delete redundant mark_inode_dirtyJiro SEKIBA2009-11-271-4/+0
| | | | | | | delete redundant mark_inode_dirty() calls Signed-off-by: Jiro SEKIBA <jir@unicus.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: expand inode_inc_link_count and inode_dec_link_countJiro SEKIBA2009-11-271-17/+32
| | | | | | | | This is an intermidiate patch to reduce redandunt mark_inode_dirty() calls by calling inode_inc_link_count() and inode_dec_link_count() functions. Signed-off-by: Jiro SEKIBA <jir@unicus.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: delete mark_inode_dirty from nilfs_set_linkJiro SEKIBA2009-11-272-2/+3
| | | | | | | | Delete mark_inode_dirty() from nilfs_set_link() to reduce redundant mark_inode_dirty() calls in caller of nilfs_set_link(). Signed-off-by: Jiro SEKIBA <jir@unicus.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: delete mark_inode_dirty in nilfs_new_inodeJiro SEKIBA2009-11-272-2/+1
| | | | | | | | | It is redundant to call mark_inode_dirty() in nilfs_new_inode() because all caller of nilfs_new_inode() will call mark_inode_dirty() after calling nilfs_new_inode() directly or indirectly in transaction. Signed-off-by: Jiro SEKIBA <jir@unicus.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: add norecovery mount optionRyusuke Konishi2009-11-204-3/+39
| | | | | | | | | | | | | | This adds "norecovery" mount option which disables temporal write access to read-only mounts or snapshots during mount/recovery. Without this option, write access will be even performed for those types of mounts; the temporal write access is needed to mount root file system read-only after an unclean shutdown. This option will be helpful when user wants to prevent any write access to the device. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Cc: Eric Sandeen <sandeen@redhat.com>
* nilfs2: add helper to get if volume is in a valid stateRyusuke Konishi2009-11-202-5/+11
| | | | | | | This adds a helper function, nilfs_valid_fs() which returns if nilfs is in a valid state or not. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: move recovery completion into load_nilfs functionRyusuke Konishi2009-11-202-56/+53
| | | | | | | | | | | | | | Although mount recovery of nilfs is integrated in load_nilfs() procedure, the completion of recovery was isolated from the procedure and performed at the end of the fill_super routine. This was somewhat confusing since the recovery is needed for the nilfs object, not for a super block instance. To resolve the inconsistency, this will integrate the recovery completion into load_nilfs(). Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: apply readahead for recovery on mountRyusuke Konishi2009-11-201-7/+19
| | | | | | | | | | | | This inserts readahead in the recovery code. The readahead request is issued per segment while searching the latest super root block. This will shorten mount time after unclean unmount. A measurement shows the recovery time was reduced by more than 60 percent: e.g. real 0m11.586s -> 0m3.918s (x 2.96) Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: clean up get/put function of a segment usageRyusuke Konishi2009-11-202-77/+0
| | | | | | | This eliminates obsolete nilfs_get_sufile_get_segment_usage() and nilfs_set_sufile_segment_usage() from sufile. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: move routine to set segment usage into sufileRyusuke Konishi2009-11-203-22/+49
| | | | | | | This adds nilfs_sufile_set_segment_usage() function in sufile to replace direct access to the sufile metadata in log writer code. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: move routine marking segment usage dirty into sufileRyusuke Konishi2009-11-203-17/+22
| | | | | | | | | This adds nilfs_sufile_mark_dirty() function in sufile to replace nilfs_touch_segusage() function in log writer code. This is a preparation for the further cleanup which will move out low level sufile operations in the log writer. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: insert cache operation in palloc get block routinesRyusuke Konishi2009-11-201-8/+54
| | | | | | | | | | This implements cache operation in get block routines of palloc code: nilfs_palloc_get_desc_block(), nilfs_palloc_get_bitmap_block(), and nilfs_palloc_get_entry_block(). This will complete the palloc cache. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: add palloc cache to ifileRyusuke Konishi2009-11-201-1/+15
| | | | | | | | This adds the palloc cache to ifile. The palloc cache is allocated on the extended region of nilfs_mdt_info struct. The struct nilfs_ifile_info defines the extended on memory structure of ifile. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: flush palloc cache before manipulating data pages of GC datRyusuke Konishi2009-11-201-0/+3
| | | | | | | | | | | | Data pages in gcdat metadata file (i.e. the secondary DAT for GC), are cleared or even moved back to the normal DAT when a shot of garbage collection was done. Buffer heads held by the palloc cache of gcdat must be cleared before these page cache manipulation. This adds nilfs_palloc_clear_cache() to ensure this. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: add palloc cache to datRyusuke Konishi2009-11-201-2/+16
| | | | | | | | This adds the palloc cache to DAT file. The palloc cache is allocated on the extended region of nilfs_mdt_info struct. The struct nilfs_dat_info defines the extended on memory structure of DAT. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: add cache framework for persistent object allocatorRyusuke Konishi2009-11-204-0/+52
| | | | | | | | | | | | | | | | | | | | | | | | | | | This adds setup and cleanup routines of the persistent object allocator cache. According to ftrace analyses, accessing buffers of the DAT file suffers indispensable overhead many times. To mitigate the overhead, This introduce cache framework for the persistent object allocator (palloc) which the DAT file and ifile are using. struct nilfs_palloc_cache represents the cache object per metadata file using palloc. The cache is initialized through nilfs_palloc_setup_cache() and destroyed by nilfs_palloc_destroy_cache(); callers of the former function will be added to individual allocators of DAT and ifile on successive patches. nilfs_palloc_destroy_cache() will be called from nilfs_mdt_destroy() if the cache is attached to a metadata file. A companion function nilfs_palloc_clear_cache() is provided to allow releasing buffer head references independently with the cleanup task. This adjunctive function will be used before invalidating pages of metadata file with the cache. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: unfold nilfs_palloc_block_get_bitmap functionRyusuke Konishi2009-11-201-15/+4
| | | | | | | This expands a trivial address calculation in the function into its every callsite. This expansion improves readability of the callers. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: eliminate nilfs_btnode_get functionRyusuke Konishi2009-11-203-24/+12
| | | | | | | | | This removes the obsolete nilfs_btnode_get() function and makes nilfs_btree_get_block() directly call nilfs_btnode_submit_block(). This expansion will provide better opportunity for code optimization. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: remove newblk argument from nilfs_btnode_submit_blockRyusuke Konishi2009-11-203-20/+6
| | | | | | | This removes the obsolete argument from nilfs_btnode_submit_block(). This will complete separating a create function of btree node. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: use nilfs_btnode_create_block functionRyusuke Konishi2009-11-202-11/+15
| | | | | | | This displaces nilfs_btnode_get() use to create new btree node block with nilfs_btnode_create_block. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: separate function for creating new btree node blockRyusuke Konishi2009-11-202-0/+28
| | | | | | | | Adds a separate routine for creating a btree node block. This is a preparation to reduce the depth of function calls during submitting btree node buffer. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: avoid readahead on metadata file for create modeRyusuke Konishi2009-11-201-13/+15
| | | | | | | This turns off readhead action of metadata file if nilfs_mdt_get_block function was called with a create flag. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: simplify nilfs_sufile_get_ncleansegs functionRyusuke Konishi2009-11-203-38/+19
| | | | | | | | | | | Previously, this function took an status code to return possible error codes. The ("nilfs2: add local variable to cache the number of clean segments") patch removed the possibility to return errors. So, this simplifies the function definition to make it directly return the number of clean segments. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: add local variable to cache the number of clean segmentsRyusuke Konishi2009-11-201-10/+43
| | | | | | | This makes it possible for sufile to get the number of clean segments faster. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: unfold nilfs_sufile_block_get_header functionRyusuke Konishi2009-11-201-12/+3
| | | | | | | This unfolds the nilfs_sufile_block_get_header() function for simplicity. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: hide nilfs_mdt_clear calls in nilfs_mdt_destroyRyusuke Konishi2009-11-206-15/+5
| | | | | | | | | | This will hide a function call of nilfs_mdt_clear() in nilfs_mdt_destroy(). This ensures nilfs_mdt_destroy() to do cleanup jobs included in nilfs_mdt_clear(). Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: eliminate inlines to directly read/write inode of metadata filesRyusuke Konishi2009-11-202-23/+6
| | | | | | | Removes two inline functions: nilfs_mdt_read_inode_direct() and nilfs_mdt_write_inode_direct(). Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: separate read method of meta data files on super root blockRyusuke Konishi2009-11-207-6/+39
| | | | | | | | | | Will displace nilfs_mdt_read_inode_direct function with an individual read method: nilfs_dat_read, nilfs_sufile_read, nilfs_cpfile_read. This provides the opportunity to initialize local variables of each metadata file after reading the inode. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: separate constructor of metadata filesRyusuke Konishi2009-11-2010-25/+89
| | | | | | | | | | | This will displace nilfs_mdt_new() constructor with individual metadata file constructors like nilfs_dat_new(), new_sufile_new(), nilfs_cpfile_new(), and nilfs_ifile_new(). This makes it possible for each metadata file to have own intialization code. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: add size option of private object to metadata file allocatorRyusuke Konishi2009-11-205-13/+24
| | | | | | | | | | This adds an optional "object size" argument to nilfs_mdt_new_common() function; the argument specifies the size of private object attached to a newly allocated metadata file inode. This will afford space to keep local variables for meta data files. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: move out mark_inode_dirty calls from bmap routinesRyusuke Konishi2009-11-202-4/+3
| | | | | | | | | | | | | | | | | | | | | | Previously, nilfs_bmap_add_blocks() and nilfs_bmap_sub_blocks() called mark_inode_dirty() after they changed the number of data blocks. This moves these calls outside bmap outermost functions like nilfs_bmap_insert() or nilfs_bmap_truncate(). This will mitigate overhead for truncate or delete operation since they repeatedly remove set of blocks. Nearly 10 percent improvement was observed for removal of a large file: # dd if=/dev/zero of=/test/aaa bs=1M count=512 # time rm /test/aaa real 2.968s -> 2.705s Further optimization may be possible by eliminating these mark_inode_dirty() uses though I avoid mixing separate changes here. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: stop marking metadata inode dirty within btree operationsRyusuke Konishi2009-11-201-6/+2
| | | | | | | | | | Since metadata file routines mark the inode dirty after they successfully changed bmap objects, nilfs_mdt_mark_dirty() calls in nilfs_bmap_add_blocks() and nilfs_bmap_sub_blocks() are redundant. This removes these overlapping calls from the bmap routines. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: remove buffer locking from btree codeRyusuke Konishi2009-11-201-60/+0
| | | | | | | | | | | | | lock_buffer() and unlock_buffer() uses in btree.c are eliminable because btree functions gain buffer heads through nilfs_btnode_get(), which never returns an on-the-fly buffer. Although nilfs_clear_dirty_page() and nilfs_copy_back_pages() in nilfs_commit_gcdat_inode() juggle btree node buffers of DAT, this is safe because these operations are protected by a log writer lock or the metadata file semaphore of DAT. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: remove buffer locking in nilfs_mark_inode_dirtyRyusuke Konishi2009-11-201-3/+0
| | | | | | | | This lock is eliminable because inodes on the buffer can be updated independently. Although a log writer also fills in bmap data on the on-disk inodes, this update is exclusively done by a log writer lock. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: cleanup unused match_bool functionJiro SEKIBA2009-11-201-13/+0
| | | | | | | match_bool function is not used anymore. Signed-off-by: Jiro SEKIBA <jir@unicus.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: Using nobarrier option instead of barrier=offJiro SEKIBA2009-11-202-12/+6
| | | | | | | | Since most of fs using nofoobar style option, modified barrier=off option as nobarrier. Signed-off-by: Jiro SEKIBA <jir@unicus.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: move definition of struct nilfs_btree_nodeJiro SEKIBA2009-11-202-22/+22
| | | | | | | | This is a trivial patch to expose struct nilfs_fs_btree_node. The struct should be exposed outside of kernel, for it is disk format. Signed-off-by: Jiro SEKIBA <jir@unicus.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: get rid of BUG_ON use in btree lookup routinesRyusuke Konishi2009-11-201-2/+16
| | | | | | | | | | | | The current btree lookup routines make a kernel oops when detected inconsistency in btree blocks. These routines should instead return a proper error code because the inconsistency usually comes from corruption of on-disk metadata. This fixes the issue by converting BUG_ON calls to proper error handlings. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* Linux 2.6.32-rc8v2.6.32-rc8Linus Torvalds2009-11-191-1/+1
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* Merge branch 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6Linus Torvalds2009-11-192-11/+9
|\ | | | | | | | | | | * 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6: SUNRPC: Address buffer overrun in rpc_uaddr2sockaddr() NFSv4: Fix a cache validation bug which causes getcwd() to return ENOENT
| * SUNRPC: Address buffer overrun in rpc_uaddr2sockaddr()Chuck Lever2009-11-141-10/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The size of buf[] must account for the string termination needed for the first strict_strtoul() call. Introduced in commit a02d6926. Fábio Olivé Leite points out that strict_strtoul() requires _either_ '\n\0' _or_ '\0' termination, so use the simpler '\0' here instead. See http://bugzilla.kernel.org/show_bug.cgi?id=14546 . Reported-by: argp@census-labs.com Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Fábio Olivé Leite <fleite@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFSv4: Fix a cache validation bug which causes getcwd() to return ENOENTTrond Myklebust2009-11-111-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Changeset a65318bf3afc93ce49227e849d213799b072c5fd (NFSv4: Simplify some cache consistency post-op GETATTRs) incorrectly changed the getattr bitmap for readdir(). This causes the readdir() function to fail to return a fileid/inode number, which again exposed a bug in the NFS readdir code that causes spurious ENOENT errors to appear in applications (see http://bugzilla.kernel.org/show_bug.cgi?id=14541). The immediate band aid is to revert the incorrect bitmap change, but more long term, we should change the NFS readdir code to cope with the fact that NFSv4 servers are not required to support fileids/inode numbers. Reported-by: Daniel J Blueman <daniel.blueman@gmail.com> Cc: stable@kernel.org Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | vt: Fix use of "new" in a struct fieldAlan Cox2009-11-192-5/+5
| | | | | | | | | | | | | | | | | | | | | | As this struct is exposed to user space and the API was added for this release it's a bit of a pain for the C++ world and we still have time to fix it. Rename the fields before we end up with that pain in an actual release. Signed-off-by: Alan Cox <alan@linux.intel.com> Reported-by: Olivier Goffart Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Fix handling of the HP/Acer 'DMAR at zero' BIOS error for machines with ↵David Woodhouse2009-11-191-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | <4GiB RAM. Commit 86cf898e1d0fca245173980e3897580db38569a8 ("intel-iommu: Check for 'DMAR at zero' BIOS error earlier.") was supposed to work by pretending not to detect an IOMMU if it was actually being reported by the BIOS at physical address zero. However, the intel_iommu_init() function is called unconditionally, as are the corresponding functions for other IOMMU hardware. So the patch only worked if you have RAM above the 4GiB boundary. It caused swiotlb to be initialised when no IOMMU was detected during early boot, and thus the later IOMMU init would refuse to run. But if you have less RAM than that, swiotlb wouldn't get set up and the IOMMU _would_ still end up being initialised, even though we never claimed to detect it. This patch also sets the dmar_disabled flag when the error is detected during the initial detection phase -- so that the later call to intel_iommu_init() will return without doing anything, regardless of whether swiotlb is used or not. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Merge branch 'fixes' of ↵Linus Torvalds2009-11-197-32/+70
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq * 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq: [CPUFREQ] Fix stale cpufreq_cpu_governor pointer [CPUFREQ] Resolve time unit thinko in ondemand/conservative govs [CPUFREQ] speedstep-ich: fix error caused by 394122ab144dae4b276d74644a2f11c44a60ac5c [CPUFREQ] Fix use after free on governor restore [CPUFREQ] acpi-cpufreq: blacklist Intel 0f68: Fix HT detection and put in notification message [CPUFREQ] powernow-k8: Fix test in get_transition_latency() [CPUFREQ] longhaul: select Longhaul version 2 for capable CPUs
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