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2008-07-15Merge branch 'generic-ipi' into generic-ipi-for-linusIngo Molnar
Conflicts: arch/powerpc/Kconfig arch/s390/kernel/time.c arch/x86/kernel/apic_32.c arch/x86/kernel/cpu/perfctr-watchdog.c arch/x86/kernel/i8259_64.c arch/x86/kernel/ldt.c arch/x86/kernel/nmi_64.c arch/x86/kernel/smpboot.c arch/x86/xen/smp.c include/asm-x86/hw_irq_32.h include/asm-x86/hw_irq_64.h include/asm-x86/mach-default/irq_vectors.h include/asm-x86/mach-voyager/irq_vectors.h include/asm-x86/smp.h kernel/Makefile Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-15Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/shaggy/jfs-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/shaggy/jfs-2.6: jfs: remove DIRENTSIZ JFS: diAlloc() should return -EIO rather than EIO JFS: skip bad iput() call in error path JFS: switch to seq_files JFS: 0 is not valid errno value so return NULL from jfs_lookup
2008-07-15Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmwLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw: [GFS2] Fix GFS2's use of do_div() in its quota calculations [GFS2] Remove unused declaration [GFS2] Remove support for unused and pointless flag [GFS2] Replace rgrp "recent list" with mru list [GFS2] Allow local DF locks when holding a cached EX glock [GFS2] Fix delayed demote race [GFS2] don't call permission() [GFS2] Fix module building [GFS2] Glock documentation [GFS2] Remove all_list from lock_dlm [GFS2] Remove obsolete conversion deadlock avoidance code [GFS2] Remove remote lock dropping code [GFS2] kernel panic mounting volume [GFS2] Revise readpage locking [GFS2] Fix ordering of args for list_add [GFS2] trivial sparse lock annotations [GFS2] No lock_nolock [GFS2] Fix ordering bug in lock_dlm [GFS2] Clean up the glock core
2008-07-15Merge branch 'for_linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (61 commits) ext4: Documention update for new ordered mode and delayed allocation ext4: do not set extents feature from the kernel ext4: Don't allow nonextenst mount option for large filesystem ext4: Enable delalloc by default. ext4: delayed allocation i_blocks fix for stat ext4: fix delalloc i_disksize early update issue ext4: Handle page without buffers in ext4_*_writepage() ext4: Add ordered mode support for delalloc ext4: Invert lock ordering of page_lock and transaction start in delalloc mm: Add range_cont mode for writeback ext4: delayed allocation ENOSPC handling percpu_counter: new function percpu_counter_sum_and_set ext4: Add delayed allocation support in data=writeback mode vfs: add hooks for ext4's delayed allocation support jbd2: Remove data=ordered mode support using jbd buffer heads ext4: Use new framework for data=ordered mode in JBD2 jbd2: Implement data=ordered mode handling via inodes vfs: export filemap_fdatawrite_range() ext4: Fix lock inversion in ext4_ext_truncate() ext4: Invert the locking order of page_lock and transaction start ...
2008-07-14Merge branch 'bkl-removal' of git://git.lwn.net/linux-2.6Linus Torvalds
* 'bkl-removal' of git://git.lwn.net/linux-2.6: (146 commits) IB/umad: BKL is not needed for ib_umad_open() IB/uverbs: BKL is not needed for ib_uverbs_open() bf561-coreb: BKL unneeded for open() Call fasync() functions without the BKL snd/PCM: fasync BKL pushdown ipmi: fasync BKL pushdown ecryptfs: fasync BKL pushdown Bluetooth VHCI: fasync BKL pushdown tty_io: fasync BKL pushdown tun: fasync BKL pushdown i2o: fasync BKL pushdown mpt: fasync BKL pushdown Remove BKL from remote_llseek v2 Make FAT users happier by not deadlocking x86-mce: BKL pushdown vmwatchdog: BKL pushdown vmcp: BKL pushdown via-pmu: BKL pushdown uml-random: BKL pushdown uml-mmapper: BKL pushdown ...
2008-07-14Merge commit 'v2.6.26' into bkl-removalJonathan Corbet
2008-07-14Merge branch 'x86/for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86/for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (821 commits) x86: make 64bit hpet_set_mapping to use ioremap too, v2 x86: get x86_phys_bits early x86: max_low_pfn_mapped fix #4 x86: change _node_to_cpumask_ptr to return const ptr x86: I/O APIC: remove an IRQ2-mask hack x86: fix numaq_tsc_disable calling x86, e820: remove end_user_pfn x86: max_low_pfn_mapped fix, #3 x86: max_low_pfn_mapped fix, #2 x86: max_low_pfn_mapped fix, #1 x86_64: fix delayed signals x86: remove conflicting nx6325 and nx6125 quirks x86: Recover timer_ack lost in the merge of the NMI watchdog x86: I/O APIC: Never configure IRQ2 x86: L-APIC: Always fully configure IRQ0 x86: L-APIC: Set IRQ0 as edge-triggered x86: merge dwarf2 headers x86: use AS_CFI instead of UNWIND_INFO x86: use ignore macro instead of hash comment x86: use matching CFI_ENDPROC ...
2008-07-14Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6: (25 commits) security: remove register_security hook security: remove dummy module fix security: remove dummy module security: remove unused sb_get_mnt_opts hook LSM/SELinux: show LSM mount options in /proc/mounts SELinux: allow fstype unknown to policy to use xattrs if present security: fix return of void-valued expressions SELinux: use do_each_thread as a proper do/while block SELinux: remove unused and shadowed addrlen variable SELinux: more user friendly unknown handling printk selinux: change handling of invalid classes (Was: Re: 2.6.26-rc5-mm1 selinux whine) SELinux: drop load_mutex in security_load_policy SELinux: fix off by 1 reference of class_to_string in context_struct_compute_av SELinux: open code sidtab lock SELinux: open code load_mutex SELinux: open code policy_rwlock selinux: fix endianness bug in network node address handling selinux: simplify ioctl checking SELinux: enable processes with mac_admin to get the raw inode contexts Security: split proc ptrace checking into read vs. attach ...
2008-07-14Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-blockLinus Torvalds
* 'for-linus' of git://git.kernel.dk/linux-2.6-block: (37 commits) splice: fix generic_file_splice_read() race with page invalidation ramfs: enable splice write drivers/block/pktcdvd.c: avoid useless memset cdrom: revert commit 22a9189 (cdrom: use kmalloced buffers instead of buffers on stack) scsi: sr avoids useless buffer allocation block: blk_rq_map_kern uses the bounce buffers for stack buffers block: add blk_queue_update_dma_pad DAC960: push down BKL pktcdvd: push BKL down into driver paride: push ioctl down into driver block: use get_unaligned_* helpers block: extend queue_flag bitops block: request_module(): use format string Add bvec_merge_data to handle stacked devices and ->merge_bvec() block: integrity flags can't use bit ops on unsigned short cmdfilter: extend default read filter sg: fix odd style (extra parenthesis) introduced by cmd filter patch block: add bounce support to blk_rq_map_user_iov cfq-iosched: get rid of enable_idle being unused warning allow userspace to modify scsi command filter on per device basis ...
2008-07-14Merge commit 'v2.6.26' into x86/coreIngo Molnar
2008-07-14LSM/SELinux: show LSM mount options in /proc/mountsEric Paris
This patch causes SELinux mount options to show up in /proc/mounts. As with other code in the area seq_put errors are ignored. Other LSM's will not have their mount options displayed until they fill in their own security_sb_show_options() function. Signed-off-by: Eric Paris <eparis@redhat.com> Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: James Morris <jmorris@namei.org>
2008-07-14Security: split proc ptrace checking into read vs. attachStephen Smalley
Enable security modules to distinguish reading of process state via proc from full ptrace access by renaming ptrace_may_attach to ptrace_may_access and adding a mode argument indicating whether only read access or full attach access is requested. This allows security modules to permit access to reading process state without granting full ptrace access. The base DAC/capability checking remains unchanged. Read access to /proc/pid/mem continues to apply a full ptrace attach check since check_mem_permission() already requires the current task to already be ptracing the target. The other ptrace checks within proc for elements like environ, maps, and fds are changed to pass the read mode instead of attach. In the SELinux case, we model such reading of process state as a reading of a proc file labeled with the target process' label. This enables SELinux policy to permit such reading of process state without permitting control or manipulation of the target process, as there are a number of cases where programs probe for such information via proc but do not need to be able to control the target (e.g. procps, lsof, PolicyKit, ConsoleKit). At present we have to choose between allowing full ptrace in policy (more permissive than required/desired) or breaking functionality (or in some cases just silencing the denials via dontaudit rules but this can hide genuine attacks). This version of the patch incorporates comments from Casey Schaufler (change/replace existing ptrace_may_attach interface, pass access mode), and Chris Wright (provide greater consistency in the checking). Note that like their predecessors __ptrace_may_attach and ptrace_may_attach, the __ptrace_may_access and ptrace_may_access interfaces use different return value conventions from each other (0 or -errno vs. 1 or 0). I retained this difference to avoid any changes to the caller logic but made the difference clearer by changing the latter interface to return a bool rather than an int and by adding a comment about it to ptrace.h for any future callers. Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov> Acked-by: Chris Wright <chrisw@sous-sol.org> Signed-off-by: James Morris <jmorris@namei.org>
2008-07-12cifs: fix wksidarr declaration to be big-endian friendlyJeff Layton
The current definition of wksidarr works fine on little endian arches (since cpu_to_le32 is a no-op there), but on big-endian arches, it fails to compile with this error: error: braced-group within expression allowed only inside a function The problem is that this static declaration has cpu_to_le32 embedded within it, and that expands into a function macro. We need to use __constant_cpu_to_le32() instead. Signed-off-by: Jeff Layton <jlayton@redhat.com> Cc: Steven French <sfrench@us.ibm.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-12cifs: fix inode leak in cifs_get_inode_info_unixJeff Layton
Try this: mount a share with unix extensions create a file on it umount the share You'll get the following message in the ring buffer: VFS: Busy inodes after unmount of cifs. Self-destruct in 5 seconds. Have a nice day... ...the problem is that cifs_get_inode_info_unix is creating and hashing a new inode even when it's going to return error anyway. The first lookup when creating a file returns an error so we end up leaking this inode before we do the actual create. This appears to be a regression caused by commit 0e4bbde94fdc33f5b3d793166b21bf768ca3e098. The following patch seems to fix it for me, and fixes a minor formatting nit as well. Signed-off-by: Jeff Layton <jlayton@redhat.com> Acked-by: Steven French <sfrench@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-12Merge branch 'linus' into x86/coreIngo Molnar
Conflicts: arch/x86/mm/ioremap.c Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-11ext4: do not set extents feature from the kernelEric Sandeen
We've talked for a while about getting rid of any feature- setting from the kernel; this gets rid of the code which would set the INCOMPAT_EXTENTS flag on the first file write when mounted as ext4[dev]. With this patch, if the extents feature is not already set on disk, then mounting as ext4 will fall back to noextents with a warning, and if -o extents is explicitly requested, the mount will fail, also with warning. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-07-11ext4: Don't allow nonextenst mount option for large filesystemAneesh Kumar K.V
The block mapped inode format can address only blocks within 2**32. This causes a number of issues, the biggest of which is that the block allocator needs to be taught that certain inodes can not utilize block numbers > 2**32. So until this is fixed, it is simplest to fail mounting of file systems with more than 2**32 blocks if the -o noextents option is given. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-07-11ext4: Enable delalloc by default.Aneesh Kumar K.V
Enable delalloc by default to ensure it gets sufficient testing and because it makes the filesystem much more efficient. Add a nodealalloc option to disable delayed allocation, and update ext4_show_options to show delayed allocation off if it is disabled. If the data=journal mount option is used, disable delayed allocation since the delalloc code doesn't support data=journal yet. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Mingming Cao <cmm@us.ibm.com>
2008-07-11ext4: delayed allocation i_blocks fix for statMingming Cao
Right now i_blocks is not getting updated until the blocks are actually allocaed on disk. This means with delayed allocation, right after files are copied, "ls -sF" shoes the file as taking 0 blocks on disk. "du" also shows the files taking zero space, which is highly confusing to the user. Since delayed allocation already keeps track of per-inode total number of blocks that are subject to delayed allocation, this patch fix this by using that to adjust the value returned by stat(2). When real block allocation is done, the i_blocks will get updated. Since the reserved blocks for delayed allocation will be decreased, this will be keep value returned by stat(2) consistent. Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-07-11ext4: fix delalloc i_disksize early update issueMingming Cao
Ext4_da_write_end() used walk_page_buffers() with a callback function of ext4_bh_unmapped_or_delay() to check if it extended the file size without allocating any blocks (since in this case i_disksize needs to be updated). However, this is didn't work proprely because the buffer head has not been marked dirty yet --- this is done later in block_commit_write() --- which caused ext4_bh_unmapped_or_delay() to always return false. In addition, walk_page_buffers() checks all of the buffer heads covering the page, and the only buffer_head that should be checked is the one covering the end of the write. Otherwise, given a 1k blocksize filesystem and a 4k page size, the buffer head covering the first 1k stripe of the file could be unmapped (because it was a sparse file), and the second or third buffer_head covering that page could be mapped, and using walk_page_buffers() would fail in this case since it would stop at the first unmapped buffer_head and return true. The core problem is that walk_page_buffers() was intended to do work in a callback function, and a non-zero return value indicated a failure, which termined the walk of the buffer heads covering the page. It was not intended to be used with a boolean function, such as ext4_bh_unmapped_or_delay(). Add addtional fix from Aneesh to protect i_disksize update rave with truncate. Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-07-11ext4: Handle page without buffers in ext4_*_writepage()Aneesh Kumar K.V
It can happen that buffers are removed from the page before it gets marked dirty and then is passed to writepage(). In writepage() we just initialize the buffers and check whether they are mapped and non delay. If they are mapped and non delay we write the page. Otherwise we mark them dirty. With this change we don't do block allocation at all in ext4_*_write_page. writepage() can get called under many condition and with a locking order of journal_start -> lock_page, we should not try to allocate blocks in writepage() which get called after taking page lock. writepage() can get called via shrink_page_list even with a journal handle which was created for doing inode update. For example when doing ext4_da_write_begin we create a journal handle with credit 1 expecting a i_disksize update for the inode. But ext4_da_write_begin can cause shrink_page_list via _grab_page_cache. So having a valid handle via ext4_journal_current_handle is not a guarantee that we can use the handle for block allocation in writepage, since we shouldn't be using credits that had been reserved for other updates. That it could result in we running out of credits when we update inodes. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-07-11ext4: Add ordered mode support for delallocAneesh Kumar K.V
This provides a new ordered mode implementation which gets rid of using buffer heads to enforce the ordering between metadata change with the related data chage. Instead, in the new ordering mode, it keeps track of all of the inodes touched by each transaction on a list, and when that transaction is committed, it flushes all of the dirty pages for those inodes. In addition, the new ordered mode reverses the lock ordering of the page lock and transaction lock, which provides easier support for delayed allocation. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-07-11ext4: Invert lock ordering of page_lock and transaction start in delallocMingming Cao
With the reverse locking, we need to start a transation before taking the page lock, so in ext4_da_writepages() we need to break the write-out into chunks, and restart the journal for each chunck to ensure the write-out fits in a single transaction. Updated patch from Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> which fixes delalloc sync hang with journal lock inversion, and address the performance regression issue. Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-07-14ext4: delayed allocation ENOSPC handlingMingming Cao
This patch does block reservation for delayed allocation, to avoid ENOSPC later at page flush time. Blocks(data and metadata) are reserved at da_write_begin() time, the freeblocks counter is updated by then, and the number of reserved blocks is store in per inode counter. At the writepage time, the unused reserved meta blocks are returned back. At unlink/truncate time, reserved blocks are properly released. Updated fix from Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> to fix the oldallocator block reservation accounting with delalloc, added lock to guard the counters and also fix the reservation for meta blocks. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2008-07-11percpu_counter: new function percpu_counter_sum_and_setMingming Cao
Delayed allocation need to check free blocks at every write time. percpu_counter_read_positive() is not quit accurate. delayed allocation need a more accurate accounting, but using percpu_counter_sum_positive() is frequently is quite expensive. This patch added a new function to update center counter when sum per-cpu counter, to increase the accurate rate for next percpu_counter_read() and require less calling expensive percpu_counter_sum(). Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-07-11ext4: Add delayed allocation support in data=writeback modeAlex Tomas
Updated with fixes from Mingming Cao <cmm@us.ibm.com> to unlock and release the page from page cache if the delalloc write_begin failed, and properly handle preallocated blocks. Also added a fix to clear buffer_delay in block_write_full_page() after allocating a delayed buffer. Updated with fixes from Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> to update i_disksize properly and to add bmap support for delayed allocation. Updated with a fix from Valerie Clement <valerie.clement@bull.net> to avoid filesystem corruption when the filesystem is mounted with the delalloc option and blocksize < pagesize. Signed-off-by: Alex Tomas <alex@clusterfs.com> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2008-07-11vfs: add hooks for ext4's delayed allocation supportAlex Tomas
Export mpage_bio_submit() and __mpage_writepage() for the benefit of ext4's delayed allocation support. Also change __block_write_full_page so that if buffers that have the BH_Delay flag set it will call get_block() to get the physical block allocated, just as in the !BH_Mapped case. Signed-off-by: Alex Tomas <alex@clusterfs.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-07-11jbd2: Remove data=ordered mode support using jbd buffer headsJan Kara
Signed-off-by: Jan Kara <jack@suse.cz>
2008-07-11ext4: Use new framework for data=ordered mode in JBD2Jan Kara
This patch makes ext4 use inode-based implementation of data=ordered mode in JBD2. It allows us to unify some data=ordered and data=writeback paths (especially writepage since we don't have to start a transaction anymore) and remove some buffer walking. Updated fix from Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> to fix file system hang due to corrupt jinode values. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-07-11jbd2: Implement data=ordered mode handling via inodesJan Kara
This patch adds necessary framework into JBD2 to be able to track inodes with each transaction and write-out their dirty data during transaction commit time. This new ordered mode brings all sorts of advantages such as possibility to get rid of journal heads and buffer heads for data buffers in ordered mode, better ordering of writes on transaction commit, simplification of some JBD code, no more anonymous pages when truncate of data being committed happens. Also with this new ordered mode, delayed allocation on ordered mode is much simpler. Signed-off-by: Jan Kara <jack@suse.cz>
2008-07-11ext4: Fix lock inversion in ext4_ext_truncate()Jan Kara
We cannot call ext4_orphan_add() from under i_data_sem because that causes a lock ordering violation between i_data_sem and and the superblock lock. Updated with Aneesh's locking order fix Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-07-11ext4: Invert the locking order of page_lock and transaction startJan Kara
This changes are needed to support data=ordered mode handling via inodes. This enables us to get rid of the journal heads and buffer heads for data buffers in the ordered mode. With the changes, during tranasaction commit we writeout the inode pages using the writepages()/writepage(). That implies we take page lock during transaction commit. This can cause a deadlock with the locking order page_lock -> jbd2_journal_start, since the jbd2_journal_start can wait for the journal_commit to happen and the journal_commit now needs to take the page lock. To avoid this dead lock reverse the locking order. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-07-11vfs: Move mark_inode_dirty() from under page lock in generic_write_end()Jan Kara
There's no need to call mark_inode_dirty() under page lock in generic_write_end(). It unnecessarily makes hold time of page lock longer and more importantly it forces locking order of page lock and transaction start for journaling filesystems. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-07-11ext4: Use page_mkwrite vma_operations to get mmap write notification.Aneesh Kumar K.V
We would like to get notified when we are doing a write on mmap section. This is needed with respect to preallocated area. We split the preallocated area into initialzed extent and uninitialzed extent in the call back. This let us handle ENOSPC better. Otherwise we get ENOSPC in the writepage and that would result in data loss. The changes are also needed to handle ENOSPC when writing to an mmap section of files with holes. Acked-by: Jan Kara <jack@suse.cz> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-07-11ext4: fix online resize with mballocFrederic Bohe
Update group infos when updating a group's descriptor. Add group infos when adding a group's descriptor. Refresh cache pages used by mb_alloc when changes occur. This will probably need modifications when META_BG resizing will be allowed. Signed-off-by: Frederic Bohe <frederic.bohe@bull.net> Signed-off-by: Mingming Cao <cmm@us.ibm.com>
2008-07-11ext4: use atomic functions to set bh_stateEric Sandeen
Use the BUFFER_FNS functions (set_buffer_foo) to set buffer head state atomically instead of nonatomic __set_bit(). Signed-off-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-07-11ext4: Set journal pointer to NULL when journal is releasedJan Kara
Set sbi->s_journal to NULL after we call journal_destroy(). This will be later needed because after journal_destroy() is called, ext4_clear_inode() can still be called for some inodes (e.g. root inode) and we'll need to detect there that journal doesn't exists anymore. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-07-11ext4: mballoc avoid use root reserved blocks for non root allocationMingming Cao
mballoc allocation missed check for blocks reserved for root users. Add ext4_has_free_blocks() check before allocation. Also modified ext4_has_free_blocks() to support multiple block allocation request. Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-07-11ext4: call blkdev_issue_flush on fsyncEric Sandeen
To ensure that bits are truly on-disk after an fsync, we should call blkdev_issue_flush if barriers are supported. Inspired by an old thread on barriers, by reiserfs & xfs which do the same, and by a patch SuSE ships with their kernel Signed-off-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-07-11ext4: cleanup block allocatorAneesh Kumar K.V
Move the code related to block allocation to a single function and add helper funtions to differient allocation for data and meta data blocks Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-07-11ext4: Use inode preallocation with -o noextentsAneesh Kumar K.V
When mballoc is enabled, block allocation for old block-based files are allocated using mballoc allocator instead of old block-based allocator. The old ext3 block reservation is turned off when mballoc is turned on. However, the in-core preallocation is not enabled for block-based/ non-extent based file block allocation. This result in performance regression, as now we don't have "reservation" ore in-core preallocation to prevent interleaved fragmentation in multiple writes workload. This patch fix this by enable per inode in-core preallocation for non extent files when mballoc is used. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-07-11ext4: fix ext4_init_block_bitmap() for metablock block groupAkinobu Mita
When meta_bg feature is enabled and s_first_meta_bg != 0, ext4_init_block_bitmap() miscalculates the number of block used by the group descriptor table (0 or 1 for metablock block group) This patch fixes this by using ext4_bg_num_gdb() Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Stephen Tweedie <sct@redhat.com> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Acked-by: Andreas Dilger <adilger@sun.com>
2008-07-11ext4: Fix sparse warningAneesh Kumar K.V
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-07-11ext4: cleanup never-used magic numbers from htree codeLi Zefan
dx_root_limit() will had some dead code which forced it to always return 20, and dx_node_limit to always return 22 for debugging purposes. Remove it. Acked-by: Andreas Dilger <adilger@sun.com> Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-07-11ext4: Fix ext4_ext_journal_restart() to reflect errors up to the callerShen Feng
Fix ext4_ext_journal_restart() so it returns any errors reported by ext4_journal_extend() and ext4_journal_restart(). Signed-off-by: Shen Feng <shen@cn.fujitsu.com> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-07-11ext4: Make ext4_ext_find_extent fills ext_path completelyShen Feng
When pos=0 or depth, the fields of ext4_ext_path is are not completely filled. This patch also removes some unnecessary code. Signed-off-by: Shen Feng <shen@cn.fujitsu.com> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-07-11ext4: return error when calling ext4_ext_split failedShen Feng
ext4_ext_create_new_leaf must return error when its calling to ext4_ext_split failed. Signed-off-by: Shen Feng <shen@cn.fujitsu.com> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-07-11ext4: Update i_disksize properly when allocating from fallocate area.Aneesh Kumar K.V
When allocating unitialized space at the end of file which had been preallocated with the FALLOC_FL_KEEP_SIZE option, the file size is not updated at that time. But the later we are not updating the file size when writing to that preallocated space. These changes are for code correctness. This patch allows us to update the i_disksize at the write_end() callback of filesystem properly. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-07-11ext4: remove quota allocation when ext4_mb_new_blocks failsShen Feng
Quota allocation is not removed when ext4_mb_new_blocks calls kmem_cache_alloc failed. Also make sure the allocation context is freed on the error path. Signed-off-by: Shen Feng <shen@cn.fujitsu.com> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-07-11ext4: remove redundant code in ext4_fill_super()Li Zefan
The previous sb_min_blocksize() has already set the block size. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>