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2009-10-03Merge 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: [PATCH] ext4: retry failed direct IO allocations ext4: Fix build warning in ext4_dirty_inode() ext4: drop ext4dev compat ext4: fix a BUG_ON crash by checking that page has buffers attached to it
2009-10-02[PATCH] ext4: retry failed direct IO allocationsEric Sandeen
On a 256M filesystem, doing this in a loop: xfs_io -F -f -d -c 'pwrite 0 64m' test rm -f test eventually leads to ENOSPC. (the xfs_io command does a 64m direct IO write to the file "test") As with other block allocation callers, it looks like we need to potentially retry the allocations on the initial ENOSPC. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-10-02ext4: Fix build warning in ext4_dirty_inode()Curt Wohlgemuth
This fixes the following warning: fs/ext4/inode.c: In function 'ext4_dirty_inode': fs/ext4/inode.c:5615: warning: unused variable 'current_handle' We remove the jbd_debug() statement which does use current_handle, as it's not terribly important in the grand scheme of things. Thanks to Stephen Rothwell for pointing this out. Signed-off-by: Curt Wohlgemuth <curtw@google.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-10-01ext4: drop ext4dev compatEric Sandeen
Kconfig & super.c promised it'd be gone by 2.6.31, so it's about time to drop it. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-09-30ext4: fix a BUG_ON crash by checking that page has buffers attached to itTheodore Ts'o
In ext4_num_dirty_pages() we were calling page_buffers() before checking to see if the page actually had pages attached to it; this would cause a BUG check crash in the inline function page_buffers(). Thanks to Markus Trippelsdorf for reporting this bug. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-09-30Merge 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: ext4: Fix time encoding with extra epoch bits ext4: Add a stub for mpage_da_data in the trace header jbd2: Use tracepoints for history file ext4: Use tracepoints for mb_history trace file ext4, jbd2: Drop unneeded printks at mount and unmount time ext4: Handle nested ext4_journal_start/stop calls without a journal ext4: Make sure ext4_dirty_inode() updates the inode in no journal mode ext4: Avoid updating the inode table bh twice in no journal mode ext4: EXT4_IOC_MOVE_EXT: Check for different original and donor inodes first ext4: async direct IO for holes and fallocate support ext4: Use end_io callback to avoid direct I/O fallback to buffered I/O ext4: Split uninitialized extents for direct I/O ext4: release reserved quota when block reservation for delalloc retry ext4: Adjust ext4_da_writepages() to write out larger contiguous chunks ext4: Fix hueristic which avoids group preallocation for closed files ext4: Use ext4_msg() for ext4_da_writepage() errors ext4: Update documentation about quota mount options
2009-09-30ext4: Fix time encoding with extra epoch bitsTheodore Ts'o
"Looking at ext4.h, I think the setting of extra time fields forgets to mask the epoch bits so the epoch part overwrites nsec part. The second change is only for coherency (2 -> EXT4_EPOCH_BITS)." Thanks to Damien Guibouret for pointing out this problem. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-09-30ext4: Use tracepoints for mb_history trace fileTheodore Ts'o
The /proc/fs/ext4/<dev>/mb_history was maintained manually, and had a number of problems: it required a largish amount of memory to be allocated for each ext4 filesystem, and the s_mb_history_lock introduced a CPU contention problem. By ripping out the mb_history code and replacing it with ftrace tracepoints, and we get more functionality: timestamps, event filtering, the ability to correlate mballoc history with other ext4 tracepoints, etc. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-09-29ext4, jbd2: Drop unneeded printks at mount and unmount timeTheodore Ts'o
There are a number of kernel printk's which are printed when an ext4 filesystem is mounted and unmounted. Disable them to economize space in the system logs. In addition, disabling the mballoc stats by default saves a number of unneeded atomic operations for every block allocation or deallocation. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-09-29ext4: Handle nested ext4_journal_start/stop calls without a journalCurt Wohlgemuth
This patch fixes a problem with handling nested calls to ext4_journal_start/ext4_journal_stop, when there is no journal present. Signed-off-by: Curt Wohlgemuth <curtw@google.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-09-29ext4: Make sure ext4_dirty_inode() updates the inode in no journal modeCurt Wohlgemuth
This patch a problem that ext4_dirty_inode() was not calling ext4_mark_inode_dirty() if the current_handle is not valid, which it is the case in no journal mode. It also removes a test for non-matching transaction which can never happen. Signed-off-by: Curt Wohlgemuth <curtw@google.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-09-29ext4: Avoid updating the inode table bh twice in no journal modeFrank Mayhar
This is a cleanup of commit 91ac6f4. Since ext4_mark_inode_dirty() has already called ext4_mark_iloc_dirty(), which in turn calls ext4_do_update_inode(), it's not necessary to have ext4_write_inode() call ext4_do_update_inode() in no journal mode. Indeed, it would be duplicated work. Reviewed-by: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Frank Mayhar <fmayhar@google.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-09-28ext4: EXT4_IOC_MOVE_EXT: Check for different original and donor inodes firstTheodore Ts'o
Move the check to make sure the original and donor inodes are different earlier, to avoid a potential deadlock by trying to lock the same inode twice. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-09-28ext4: async direct IO for holes and fallocate supportMingming Cao
For async direct IO that covers holes or fallocate, the end_io callback function now queued the convertion work on workqueue but don't flush the work rightaway as it might take too long to afford. But when fsync is called after all the data is completed, user expects the metadata also being updated before fsync returns. Thus we need to flush the conversion work when fsync() is called. This patch keep track of a listed of completed async direct io that has a work queued on workqueue. When fsync() is called, it will go through the list and do the conversion. Signed-off-by: Mingming Cao <cmm@us.ibm.com>
2009-09-28ext4: Use end_io callback to avoid direct I/O fallback to buffered I/OMingming Cao
Currently the DIO VFS code passes create = 0 when writing to the middle of file. It does this to avoid block allocation for holes, so as not to expose stale data out when there is a parallel buffered read (which does not hold the i_mutex lock). Direct I/O writes into holes falls back to buffered IO for this reason. Since preallocated extents are treated as holes when doing a get_block() look up (buffer is not mapped), direct IO over fallocate also falls back to buffered IO. Thus ext4 actually silently falls back to buffered IO in above two cases, which is undesirable. To fix this, this patch creates unitialized extents when a direct I/O write into holes in sparse files, and registering an end_io callback which converts the uninitialized extent to an initialized extent after the I/O is completed. Singed-Off-By: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-09-28ext4: Split uninitialized extents for direct I/OMingming Cao
When writing into an unitialized extent via direct I/O, and the direct I/O doesn't exactly cover the unitialized extent, split the extent into uninitialized and initialized extents before submitting the I/O. This avoids needing to deal with an ENOSPC error in the end_io callback that gets used for direct I/O. When the IO is complete, the written extent will be marked as initialized. Singed-Off-By: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-09-28ext4: release reserved quota when block reservation for delalloc retryMingming Cao
ext4_da_reserve_space() can reserve quota blocks multiple times if ext4_claim_free_blocks() fail and we retry the allocation. We should release the quota reservation before restarting. Bug found by Jan Kara. Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-09-29ext4: Adjust ext4_da_writepages() to write out larger contiguous chunksTheodore Ts'o
Work around problems in the writeback code to force out writebacks in larger chunks than just 4mb, which is just too small. This also works around limitations in the ext4 block allocator, which can't allocate more than 2048 blocks at a time. So we need to defeat the round-robin characteristics of the writeback code and try to write out as many blocks in one inode before allowing the writeback code to move on to another inode. We add a a new per-filesystem tunable, max_writeback_mb_bump, which caps this to a default of 128mb per inode. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-09-28ext4: Fix hueristic which avoids group preallocation for closed filesTheodore Ts'o
The hueristic was designed to avoid using locality group preallocation when writing the last segment of a closed file. Fix it by move setting size to the maximum of size and isize until after we check whether size == isize. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-09-27const: mark struct vm_struct_operationsAlexey Dobriyan
* mark struct vm_area_struct::vm_ops as const * mark vm_ops in AGP code But leave TTM code alone, something is fishy there with global vm_ops being used. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-09-26ext4: Use ext4_msg() for ext4_da_writepage() errorsTheodore Ts'o
This allows the user to see what filesystem was involved with a particular ext4_da_writepage() error. Also, use KERN_CRIT which is more appropriate than KERN_EMERG. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-09-24Merge branch 'hwpoison' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6 * 'hwpoison' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6: (21 commits) HWPOISON: Enable error_remove_page on btrfs HWPOISON: Add simple debugfs interface to inject hwpoison on arbitary PFNs HWPOISON: Add madvise() based injector for hardware poisoned pages v4 HWPOISON: Enable error_remove_page for NFS HWPOISON: Enable .remove_error_page for migration aware file systems HWPOISON: The high level memory error handler in the VM v7 HWPOISON: Add PR_MCE_KILL prctl to control early kill behaviour per process HWPOISON: shmem: call set_page_dirty() with locked page HWPOISON: Define a new error_remove_page address space op for async truncation HWPOISON: Add invalidate_inode_page HWPOISON: Refactor truncate to allow direct truncating of page v2 HWPOISON: check and isolate corrupted free pages v2 HWPOISON: Handle hardware poisoned pages in try_to_unmap HWPOISON: Use bitmask/action code for try_to_unmap behaviour HWPOISON: x86: Add VM_FAULT_HWPOISON handling to x86 page fault handler v2 HWPOISON: Add poison check to page fault handling HWPOISON: Add basic support for poisoned pages in fault handler v3 HWPOISON: Add new SIGBUS error codes for hardware poison signals HWPOISON: Add support for poison swap entries v2 HWPOISON: Export some rmap vma locking to outside world ...
2009-09-22Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (34 commits) trivial: fix typo in aic7xxx comment trivial: fix comment typo in drivers/ata/pata_hpt37x.c trivial: typo in kernel-parameters.txt trivial: fix typo in tracing documentation trivial: add __init/__exit macros in drivers/gpio/bt8xxgpio.c trivial: add __init macro/ fix of __exit macro location in ipmi_poweroff.c trivial: remove unnecessary semicolons trivial: Fix duplicated word "options" in comment trivial: kbuild: remove extraneous blank line after declaration of usage() trivial: improve help text for mm debug config options trivial: doc: hpfall: accept disk device to unload as argument trivial: doc: hpfall: reduce risk that hpfall can do harm trivial: SubmittingPatches: Fix reference to renumbered step trivial: fix typos "man[ae]g?ment" -> "management" trivial: media/video/cx88: add __init/__exit macros to cx88 drivers trivial: fix typo in CONFIG_DEBUG_FS in gcov doc trivial: fix missing printk space in amd_k7_smp_check trivial: fix typo s/ketymap/keymap/ in comment trivial: fix typo "to to" in multiple files trivial: fix typos in comments s/DGBU/DBGU/ ...
2009-09-22const: make struct super_block::s_qcop constAlexey Dobriyan
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-09-22const: make struct super_block::dq_op constAlexey Dobriyan
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-09-21trivial: fix typo "to to" in multiple filesAnand Gadiyar
Signed-off-by: Anand Gadiyar <gadiyar@ti.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2009-09-17ext4: replace MAX_DEFRAG_SIZE with EXT_MAX_BLOCKEric Sandeen
There's no reason to redefine the maximum allowable offset in an extent-based file just for defrag; EXT_MAX_BLOCK already does this. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-09-17ext4: Fix the alloc on close after a truncate hueristicTheodore Ts'o
In an attempt to avoid doing an unneeded flush after opening a (previously non-existent) file with O_CREAT|O_TRUNC, the code only triggered the hueristic if ei->disksize was non-zero. Turns out that the VFS doesn't call ->truncate() if the file doesn't exist, and ei->disksize is always zero even if the file previously existed. So remove the test, since it isn't necessary and in fact disabled the hueristic. Thanks to Clemens Eisserer that he was seeing problems with files written using kwrite and eclipse after sudden crashes caused by a buggy Intel video driver. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-09-16ext4: Add a tracepoint for ext4_alloc_da_blocks()Theodore Ts'o
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-09-17ext4: store EXT4_EXT_MIGRATE in i_state instead of i_flagsTheodore Ts'o
EXT4_EXT_MIGRATE is only intended to be used for an in-memory flag, and the hex value assigned to it collides with FS_DIRECTIO_FL (which is also stored in i_flags). There's no reason for the EXT4_EXT_MIGRATE bit to be stored in i_flags, so we switch it to use i_state instead. Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-09-16ext4: limit block allocations for indirect-block files to < 2^32Eric Sandeen
Today, the ext4 allocator will happily allocate blocks past 2^32 for indirect-block files, which results in the block numbers getting truncated, and corruption ensues. This patch limits such allocations to < 2^32, and adds BUG_ONs if we do get blocks larger than that. This should address RH Bug 519471, ext4 bitmap allocator must limit blocks to < 2^32 * ext4_find_goal() is modified to choose a goal < UINT_MAX, so that our starting point is in an acceptable range. * ext4_xattr_block_set() is modified such that the goal block is < UINT_MAX, as above. * ext4_mb_regular_allocator() is modified so that the group search does not continue into groups which are too high * ext4_mb_use_preallocated() has a check that we don't use preallocated space which is too far out * ext4_alloc_blocks() and ext4_xattr_block_set() add some BUG_ONs No attempt has been made to limit inode locations to < 2^32, so we may wind up with blocks far from their inodes. Doing this much already will lead to some odd ENOSPC issues when the "lower 32" gets full, and further restricting inodes could make that even weirder. For high inodes, choosing a goal of the original, % UINT_MAX, may be a bit odd, but then we're in an odd situation anyway, and I don't know of a better heuristic. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-09-16ext4: Fix different block exchange issue in EXT4_IOC_MOVE_EXTAkira Fujita
If logical block offset of original file which is passed to EXT4_IOC_MOVE_EXT is different from donor file's, a calculation error occurs in ext4_calc_swap_extents(), therefore wrong block is exchanged between original file and donor file. As a result, we hit ext4_error() in check_block_validity(). To detect the logical offset difference in EXT4_IOC_MOVE_EXT, add checks to mext_calc_swap_extents() and handle it as error, since data exchange must be done between the same blocks in EXT4_IOC_MOVE_EXT. Reported-by: Peng Tao <bergwolf@gmail.com> Signed-off-by: Akira Fujita <a-fujita@rs.jp.nec.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-09-16ext4: Add null extent check to ext_get_pathAkira Fujita
There is the possibility that path structure which is taken by ext4_ext_find_extent() indicates null extents. Because during data block exchanging in ext4_move_extents(), constitution of an extent tree may be changed. As a solution, the patch adds null extent check to ext_get_path(). Reported-by: Peng Tao <bergwolf@gmail.com> Signed-off-by: Akira Fujita <a-fujita@rs.jp.nec.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-09-16ext4: Replace BUG_ON() with ext4_error() in move_extents.cAkira Fujita
Replace BUG_ON calls with a call to ext4_error() to print an error message if EXT4_IOC_MOVE_EXT failed with some kind of reasons. This will help to debug. Ted pointed this out, thanks. Signed-off-by: Akira Fujita <a-fujita@rs.jp.nec.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-09-16ext4: Replace get_ext_path macro with an inline funcitonAkira Fujita
Replace get_ext_path macro with an inline function, since this macro looks like a function call but its arguments get modified. Ted pointed this out, thanks. Signed-off-by: Akira Fujita <a-fujita@rs.jp.nec.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-09-16HWPOISON: Enable .remove_error_page for migration aware file systemsAndi Kleen
Enable removing of corrupted pages through truncation for a bunch of file systems: ext*, xfs, gfs2, ocfs2, ntfs These should cover most server needs. I chose the set of migration aware file systems for this for now, assuming they have been especially audited. But in general it should be safe for all file systems on the data area that support read/write and truncate. Caveat: the hardware error handler does not take i_mutex for now before calling the truncate function. Is that ok? Cc: tytso@mit.edu Cc: hch@infradead.org Cc: mfasheh@suse.com Cc: aia21@cantab.net Cc: hugh.dickins@tiscali.co.uk Cc: swhiteho@redhat.com Signed-off-by: Andi Kleen <ak@linux.intel.com>
2009-09-14ext4: Fix include/trace/events/ext4.h to work with SystemtapTheodore Ts'o
Using relative pathnames in #include statements interacts badly with SystemTap, since the fs/ext4/*.h header files are not packaged up as part of a distribution kernel's header files. Since systemtap doesn't use TP_fast_assign(), we can use a blind structure definition and then make sure the needed header files are defined before the ext4 source files #include the trace/events/ext4.h header file. https://bugzilla.redhat.com/show_bug.cgi?id=512478 Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-09-14ext4: Remove syncing logic from ext4_file_writeJan Kara
The syncing is now properly handled by generic_file_aio_write() so no special ext4 code is needed. CC: linux-ext4@vger.kernel.org CC: tytso@mit.edu Signed-off-by: Jan Kara <jack@suse.cz>
2009-09-11ext4: Fix initalization of s_flex_groupsTheodore Ts'o
The s_flex_groups array should have been initialized using atomic_add to sum up the free counts from the block groups that make up a flex_bg. By using atomic_set, the value of the s_flex_groups array was set to the values of the last block group in the flex_bg. The impact of this bug is that the block and inode allocation algorithms might not pick the best flex_bg for new allocation. Thanks to Damien Guibouret for pointing out this problem! Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-09-10ext4: Always set dx_node's fake_dirent explicitly.Andreas Schlick
When ext4_dx_add_entry() has to split an index node, it has to ensure that name_len of dx_node's fake_dirent is also zero, because otherwise e2fsck won't recognise it as an intermediate htree node and consider the htree to be corrupted. Signed-off-by: Andreas Schlick <schlick@lavabit.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-09-10ext4: Don't update superblock write time when filesystem is read-onlyTheodore Ts'o
This avoids updating the superblock write time when we are mounting the root file system read/only but we need to replay the journal; at that point, for people who are east of GMT and who make their clock tick in localtime for Windows bug-for-bug compatibility, and this will cause e2fsck to complain and force a full file system check. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-09-09ext4: Clarify the locking details in mballocAneesh Kumar K.V
We don't need to take the alloc_sem lock when we are adding new groups, since mballoc won't see the new group added until we bump sbi->s_groups_count. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2009-09-09ext4: check for need init flag in ext4_mb_load_buddyAneesh Kumar K.V
We should check for need init flag with the group's alloc_sem held, to make sure while we are loading the buddy cache and holding a reference to it, a file system resize can't add new blocks to same group. The patch also drops the need init flag check in ext4_mb_regular_allocator() because doing the check without holding alloc_sem is racy. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2009-09-09ext4: move ext4_mb_init_group() function earlier in the mballoc.cAneesh Kumar K.V
This moves the function around so that it can be called from ext4_mb_load_buddy(). Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-09-09ext4: Make non-journal fsync work properlyFrank Mayhar
Teach ext4_write_inode() and ext4_do_update_inode() about non-journal mode: If we're not using a journal, ext4_write_inode() now calls ext4_do_update_inode() (after getting the iloc via ext4_get_inode_loc()) with a new "do_sync" parameter. If that parameter is nonzero _and_ we're not using a journal, ext4_do_update_inode() calls sync_dirty_buffer() instead of ext4_handle_dirty_metadata(). This problem was found in power-fail testing, checking the amount of loss of files and blocks after a power failure when using fsync() and when not using fsync(). It turned out that using fsync() was actually worse than not doing so, possibly because it increased the likelihood that the inodes would remain unflushed and would therefore be lost at the power failure. Signed-off-by: Frank Mayhar <fmayhar@google.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-09-12ext4: Assure that metadata blocks are written during fsync in no journal modeTheodore Ts'o
When there is no journal present, we must attach buffer heads associated with extent tree and indirect blocks to the inode's mapping->private_list via mark_buffer_dirty_inode() so that ext4_sync_file() --- which is called to service fsync() and fdatasync() system calls --- can write out the inode's metadata blocks by calling sync_mapping_buffers(). Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-09-09ext4: Use bforget() in no journal mode for ext4_journal_{forget,revoke}()Theodore Ts'o
When ext4 is using a journal, a metadata block which is deallocated must be passed into the journal layer so it can be dropped from the current transaction and/or revoked. This is done by calling the functions ext4_journal_forget() and ext4_journal_revoke(), which call jbd2_journal_forget(), and jbd2_journal_revoke(), respectively. Since the jbd2_journal_forget() and jbd2_journal_revoke() call bforget(), if ext4 is not using a journal, ext4_journal_forget() and ext4_journal_revoke() must call bforget() to avoid a dirty metadata block overwriting a block after it has been reallocated and reused for another inode's data block. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-09-08ext[234]: move over to 'check_acl' permission modelLinus Torvalds
Don't implement per-filesystem 'extX_permission()' functions that have to be called for every path component operation, and instead just expose the actual ACL checking so that the VFS layer can now do it for us. Reviewed-by: James Morris <jmorris@namei.org> Acked-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-09-08ext4: print more sysadmin-friendly message in check_block_validity()Theodore Ts'o
Drop the WARN_ON(1), as he stack trace is not appropriate, since it is triggered by file system corruption, and it misleads users into thinking there is a kernel bug. In addition, change the message displayed by ext4_error() to make it clear that this is a file system corruption problem. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-09-09ext4: Take page lock before looking at attached buffer_heads flagsAneesh Kumar K.V
In order to check whether the buffer_heads are mapped we need to hold page lock. Otherwise a reclaim can cleanup the attached buffer_heads. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>