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2007-01-23[PATCH] resierfs: avoid tail packing if an inode was ever mmappedVladimir Saveliev
This patch fixes a confusion reiserfs has for a long time. On release file operation reiserfs used to try to pack file data stored in last incomplete page of some files into metadata blocks. After packing the page got cleared with clear_page_dirty. It did not take into account that the page may be mmaped into other process's address space. Recent replacement for clear_page_dirty cancel_dirty_page found the confusion with sanity check that page has to be not mapped. The patch fixes the confusion by making reiserfs avoid tail packing if an inode was ever mmapped. reiserfs_mmap and reiserfs_file_release are serialized with mutex in reiserfs specific inode. reiserfs_mmap locks the mutex and sets a bit in reiserfs specific inode flags. reiserfs_file_release checks the bit having the mutex locked. If bit is set - tail packing is avoided. This eliminates a possibility that mmapped page gets cancel_page_dirty-ed. Signed-off-by: Vladimir Saveliev <vs@namesys.com> Cc: Jeff Mahoney <jeffm@suse.com> Cc: Chris Mason <mason@suse.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-01-23[PATCH] fix blk_direct_IO bio preparationChen, Kenneth W
For large size DIO that needs multiple bio, one full page worth of data was lost at the boundary of bio's maximum sector or segment limits. After a bio is full and got submitted. The outer while (nbytes) { ... } loop will allocate a new bio and just march on to index into next page. It just forgets about the page that bio_add_page() rejected when previous bio is full. Fix it by put the rejected page back to pvec so we pick it up again for the next bio. Signed-off-by: Ken Chen <kenneth.w.chen@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-01-23[PATCH] blockdev direct_io: fix signedness bugAndrew Morton
size_t is unsigned. IO errors aren't getting through. Cc: "Chen, Kenneth W" <kenneth.w.chen@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-01-22Merge git://git.infradead.org/mtd-2.6Linus Torvalds
* git://git.infradead.org/mtd-2.6: (84 commits) [JFFS2] debug.h: include <linux/sched.h> for current->pid [MTD] OneNAND: Handle DDP chip boundary during read-while-load [MTD] OneNAND: return ecc error code only when 2-bit ecc occurs [MTD] OneNAND: Implement read-while-load [MTD] OneNAND: fix onenand_wait bug in read ecc error [MTD] OneNAND: release CPU in cycles [MTD] OneNAND: add subpage write support [MTD] OneNAND: fix onenand_wait bug [JFFS2] use the ref_offset macro [JFFS2] Reschedule in loops [JFFS2] Fix error-path leak in summary scan [JFFS2] add cond_resched() when garbage collecting deletion dirent [MTD] Nuke IVR leftovers [MTD] OneNAND: fix oob handling in recent oob patch [MTD] Fix ssfdc blksize typo [JFFS2] replace kmalloc+memset with kzalloc [MTD] Fix SSFDC build for variable blocksize. [MTD] ESB2ROM uses PCI [MTD] of_device-based physmap driver [MTD] Support combined RedBoot FIS directory and configuration area ...
2007-01-22Merge branch 'upstream-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2 * 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2: ocfs2: Add backup superblock info to ocfs2_fs.h ocfs2: cleanup ocfs2_iget() errors ocfs2: Directory c/mtime update fixes ocfs2: Don't print errors when following symlinks
2007-01-21ocfs2: Add backup superblock info to ocfs2_fs.hMark Fasheh
This synchronizes us with recent ocfs2-tools changes. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2007-01-21ocfs2: cleanup ocfs2_iget() errorsMark Fasheh
Get rid of some error prints in the ocfs2_iget() path from ocfs2_get_dentry(). NFSD can easily cause us to read stale inodes. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2007-01-21ocfs2: Directory c/mtime update fixesMark Fasheh
ocfs2 wasn't updating c/mtime on directories during dirent creation/deletion. Fix ocfs2_unlink(), ocfs2_rename() and __ocfs2_add_entry() by adding the proper code to update the struct inode and push the change out to disk. This helps rename/unlink on nfs exported file systems in particular as those clients compare directory time values to avoid a full re-reading a directory which hasn't changed. ocfs2_rename() loses some superfluous error handling as a result of this patch. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2007-01-21ocfs2: Don't print errors when following symlinksMark Fasheh
We shouldn't print errors returned from vfs_follow_link(). This was causing spurious errors to show up in the logs. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2007-01-18NTFS: Forgot to bump version number in makefile to 2.1.28...Anton Altaparmakov
Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
2007-01-18NTFS: 2.1.28 - Fix deadlock reported by Sergey Vlasov due to ntfs_put_inode().Anton Altaparmakov
- Fix deadlock in fs/ntfs/inode.c::ntfs_put_inode(). Thanks to Sergey Vlasov for the report and detailed analysis of the deadlock. The fix involved getting rid of ntfs_put_inode() altogether and hence NTFS no longer has a ->put_inode super operation. Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
2007-01-18Merge branch 'master' of ↵David Woodhouse
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
2007-01-13[JFFS2] debug.h: include <linux/sched.h> for current->pidDavid Woodhouse
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-01-11[PATCH] Revert bd_mount_mutex back to a semaphoreDavid Chinner
Revert bd_mount_mutex back to a semaphore so that xfs_freeze -f /mnt/newtest; xfs_freeze -u /mnt/newtest works safely and doesn't produce lockdep warnings. (XFS unlocks the semaphore from a different task, by design. The mutex code warns about this) Signed-off-by: Dave Chinner <dgc@sgi.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2007-01-11[PATCH] NFS: Fix race in nfs_release_page()Trond Myklebust
NFS: Fix race in nfs_release_page() invalidate_inode_pages2() may find the dirty bit has been set on a page owing to the fact that the page may still be mapped after it was locked. Only after the call to unmap_mapping_range() are we sure that the page can no longer be dirtied. In order to fix this, NFS has hooked the releasepage() method and tries to write the page out between the call to unmap_mapping_range() and the call to remove_mapping(). This, however leads to deadlocks in the page reclaim code, where the page may be locked without holding a reference to the inode or dentry. Fix is to add a new address_space_operation, launder_page(), which will attempt to write out a dirty page without releasing the page lock. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Also, the bare SetPageDirty() can skew all sort of accounting leading to other nasties. [akpm@osdl.org: cleanup] Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2007-01-10[PATCH] fix linux banner format stringRoman Zippel
Revert previous attempts at messing with the linux banner string and simply use a separate format string for proc. Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Acked-by: Olaf Hering <olaf@aepfle.de> Acked-by: Jean Delvare <khali@linux-fr.org> Cc: Andrey Borzenkov <arvidjaar@mail.ru> Cc: Andrew Morton <akpm@osdl.org> Cc: Andy Whitcroft <apw@shadowen.org> Cc: Herbert Poetzl <herbert@13thfloor.at> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2007-01-10[JFFS2] use the ref_offset macroKyungmin Park
Don't use ref->flash_offset directly in debugging code, use the ref_offset macro instead. Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Artem Bityutskiy <dedekind@infradead.org>
2007-01-10[JFFS2] Reschedule in loopsArtem Bityutskiy
Make JFFS2 nicer and teach it to call cond_resched() in loops which may be quite large. Signed-off-by: Artem Bityutskiy <dedekind@infradead.org>
2007-01-06Revert "[PATCH] binfmt_elf: randomize PIE binaries (2nd try)"Linus Torvalds
This reverts commit 59287c0913cc9a6c75712a775f6c1c1ef418ef3b. Hugh Dickins reports that it causes random failures on x86 with SuSE 10.2, and points out "Isn't that randomization, anywhere from 0x10000 to ELF_ET_DYN_BASE, sure to place the ET_DYN from time to time just where the comment says it's trying to avoid? I assume that somehow results in the error reported." (where the comment in question is the existing comment in the source code about mmap/brk clashes). Suggested-by: Hugh Dickins <hugh@veritas.com> Acked-by: Marcus Meissner <meissner@suse.de> Cc: Andrew Morton <akpm@osdl.org> Cc: Andi Kleen <ak@suse.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Dave Jones <davej@codemonkey.org.uk> Cc: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2007-01-05[PATCH] fix garbage instead of zeroes in UFSEvgeniy Dushistov
Looks like this is the problem, which point Al Viro some time ago: ufs's get_block callback allocates 16k of disk at a time, and links that entire 16k into the file's metadata. But because get_block is called for only a single buffer_head (a 2k buffer_head in this case?) we are only able to tell the VFS that this 2k is buffer_new(). So when ufs_getfrag_block() is later called to map some more data in the file, and when that data resides within the remaining 14k of this fragment, ufs_getfrag_block() will incorrectly return a !buffer_new() buffer_head. I don't see _right_ way to do nullification of whole block, if use inode page cache, some pages may be outside of inode limits (inode size), and will be lost; if use blockdev page cache it is possible to zero real data, if later inode page cache will be used. The simpliest way, as can I see usage of block device page cache, but not only mark dirty, but also sync it during "nullification". I use my simple tests collection, which I used for check that create,open,write,read,close works on ufs, and I see that this patch makes ufs code 18% slower then before. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2007-01-05[PATCH] fix memory corruption from misinterpreted bad_inode_ops return valuesEric Sandeen
CVE-2006-5753 is for a case where an inode can be marked bad, switching the ops to bad_inode_ops, which are all connected as: static int return_EIO(void) { return -EIO; } #define EIO_ERROR ((void *) (return_EIO)) static struct inode_operations bad_inode_ops = { .create = bad_inode_create ...etc... The problem here is that the void cast causes return types to not be promoted, and for ops such as listxattr which expect more than 32 bits of return value, the 32-bit -EIO is interpreted as a large positive 64-bit number, i.e. 0x00000000fffffffa instead of 0xfffffffa. This goes particularly badly when the return value is taken as a number of bytes to copy into, say, a user's buffer for example... I originally had coded up the fix by creating a return_EIO_<TYPE> macro for each return type, like this: static int return_EIO_int(void) { return -EIO; } #define EIO_ERROR_INT ((void *) (return_EIO_int)) static struct inode_operations bad_inode_ops = { .create = EIO_ERROR_INT, ...etc... but Al felt that it was probably better to create an EIO-returner for each actual op signature. Since so few ops share a signature, I just went ahead & created an EIO function for each individual file & inode op that returns a value. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2007-01-05[PATCH] adfs: fix filename handlingJames Bursa
Fix filenames on adfs discs being terminated at the first character greater than 128 (adfs filenames are Latin 1). I saw this problem when using a loopback adfs image on a 2.6.17-rc5 x86_64 machine, and the patch fixed it there. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2007-01-02[JFFS2] Fix error-path leak in summary scanAmit Choudhary
Signed-off-by: Amit Choudhary <amit2030@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-12-30Merge branch 'upstream-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2 * 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2: ocfs2: export heartbeat thread pid via configfs ocfs2: always unmap in ocfs2_data_convert_worker() ocfs2: ignore NULL vfsmnt in ocfs2_should_update_atime() ocfs2: Allow direct I/O read past end of file ocfs2: don't print error in ocfs2_permission()
2006-12-30[PATCH] ramfs breaks without CONFIG_BLOCKDimitri Gorokhovik
ramfs doesn't provide the .set_dirty_page a_op, and when the BLOCK layer is not configured in, 'set_page_dirty' makes a call via a NULL pointer. Signed-off-by: Dimitri Gorokhovik <dimitri.gorokhovik@free.fr> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] Fix lock inversion aio_kick_handler()Zach Brown
lockdep found a AB BC CA lock inversion in retry-based AIO: 1) The task struct's alloc_lock (A) is acquired in process context with interrupts enabled. An interrupt might arrive and call wake_up() which grabs the wait queue's q->lock (B). 2) When performing retry-based AIO the AIO core registers aio_wake_function() as the wake funtion for iocb->ki_wait. It is called with the wait queue's q->lock (B) held and then tries to add the iocb to the run list after acquiring the ctx_lock (C). 3) aio_kick_handler() holds the ctx_lock (C) while acquiring the alloc_lock (A) via lock_task() and unuse_mm(). Lockdep emits a warning saying that we're trying to connect the irq-safe q->lock to the irq-unsafe alloc_lock via ctx_lock. This fixes the inversion by calling unuse_mm() in the AIO kick handing path after we've released the ctx_lock. As Ben LaHaise pointed out __put_ioctx could set ctx->mm to NULL, so we must only access ctx->mm while we have the lock. Signed-off-by: Zach Brown <zach.brown@oracle.com> Signed-off-by: Suparna Bhattacharya <suparna@in.ibm.com> Acked-by: Benjamin LaHaise <bcrl@kvack.org> Cc: "Chen, Kenneth W" <kenneth.w.chen@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-28ocfs2: export heartbeat thread pid via configfsZhen Wei
The patch allows the ocfs2 heartbeat thread to prioritize I/O which may help cut down on spurious fencing. Most of this will be in the tools - we can have a pid configfs attribute and let userspace (ocfs2_hb_ctl) calls the ioprio_set syscall after starting heartbeat, but only cfq scheduler supports I/O priorities now. Signed-off-by: Zhen Wei <zwei@novell.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2006-12-28ocfs2: always unmap in ocfs2_data_convert_worker()Mark Fasheh
Mmap-heavy clustered workloads were sometimes finding stale data on mmap reads. The solution is to call unmap_mapping_range() on any down convert of a data lock. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2006-12-28ocfs2: ignore NULL vfsmnt in ocfs2_should_update_atime()Mark Fasheh
This can come from NFSD. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2006-12-28ocfs2: Allow direct I/O read past end of fileMark Fasheh
ocfs2_direct_IO_get_blocks() was incorrectly returning -EIO for a direct I/O read whose start block was past the end of the file allocation tree. Fix things so that we return a hole instead. do_direct_IO() will then notice that the range start is past eof and return a short read. While there, remove the unused vbo_max variable. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2006-12-28ocfs2: don't print error in ocfs2_permission()Mark Fasheh
Errors from generic_permission() can happen in valid cases and shouldn't be reported. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2006-12-23Fix up CIFS for "test_clear_page_dirty()" removalLinus Torvalds
This also adds he required page "writeback" flag handling, that cifs hasn't been doing and that the page dirty flag changes made obvious. Acked-by: Steve French <smfltc@us.ibm.com> Acked-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-23Fix reiserfs after "test_clear_page_dirty()" removalLinus Torvalds
Thanks to Len Brown for testing this fix, since while they have in the past, none of my machines run reiserfs at the moment. Cc: Vladimir V. Saveliev <vs@namesys.com> Acked-by: Len Brown <lenb@kernel.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22[PATCH] jbd: wait for already submitted t_sync_datalist buffer to completeHisashi Hifumi
In the current jbd code, if a buffer on BJ_SyncData list is dirty and not locked, the buffer is refiled to BJ_Locked list, submitted to the IO and waited for IO completion. But the fsstress test showed the case that when a buffer was already submitted to the IO just before the buffer_dirty(bh) check, the buffer was not waited for IO completion. Following patch solves this problem. If it is assumed that a buffer is submitted to the IO before the buffer_dirty(bh) check and still being written to disk, this buffer is refiled to BJ_Locked list. Signed-off-by: Hisashi Hifumi <hifumi.hisashi@oss.ntt.co.jp> Cc: Jan Kara <jack@ucw.cz> Cc: "Stephen C. Tweedie" <sct@redhat.com> Cc: <linux-ext4@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22[PATCH] fdtable: Provide free_fdtable() wrapperVadim Lobanov
Christoph Hellwig has expressed concerns that the recent fdtable changes expose the details of the RCU methodology used to release no-longer-used fdtable structures to the rest of the kernel. The trivial patch below addresses these concerns by introducing the appropriate free_fdtable() calls, which simply wrap the release RCU usage. Since free_fdtable() is a one-liner, it makes sense to promote it to an inline helper. Signed-off-by: Vadim Lobanov <vlobanov@speakeasy.net> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22[PATCH] Make JFFS depend on CONFIG_BROKENJosh Boyer
Mark JFFS as broken and provide a warning to users that it is deprecated and scheduled for removal in 2.6.21 Signed-off-by: Josh Boyer <jwboyer@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22[PATCH] fsstack: Remove inode copyMichael Halcrow
Trevor found a file size problem in eCryptfs in recent kernels, and he tracked it down to an fsstack change. This was the eCryptfs copy_attr_all: > -void ecryptfs_copy_attr_all(struct inode *dest, const struct inode *src) > -{ > - dest->i_mode = src->i_mode; > - dest->i_nlink = src->i_nlink; > - dest->i_uid = src->i_uid; > - dest->i_gid = src->i_gid; > - dest->i_rdev = src->i_rdev; > - dest->i_atime = src->i_atime; > - dest->i_mtime = src->i_mtime; > - dest->i_ctime = src->i_ctime; > - dest->i_blkbits = src->i_blkbits; > - dest->i_flags = src->i_flags; > -} This is the fsstack copy_attr_all: > +void fsstack_copy_attr_all(struct inode *dest, const struct inode *src, > + int (*get_nlinks)(struct inode *)) > +{ > + if (!get_nlinks) > + dest->i_nlink = src->i_nlink; > + else > + dest->i_nlink = (*get_nlinks)(dest); > + > + dest->i_mode = src->i_mode; > + dest->i_uid = src->i_uid; > + dest->i_gid = src->i_gid; > + dest->i_rdev = src->i_rdev; > + dest->i_atime = src->i_atime; > + dest->i_mtime = src->i_mtime; > + dest->i_ctime = src->i_ctime; > + dest->i_blkbits = src->i_blkbits; > + dest->i_flags = src->i_flags; > + > + fsstack_copy_inode_size(dest, src); > +} The addition of copy_inode_size breaks eCryptfs, since eCryptfs needs to interpolate the file sizes (eCryptfs has extra space in the lower file for the header). The setting of the upper inode size occurs elsewhere in eCryptfs, and the new copy_attr_all now undoes what eCryptfs was doing right beforehand. I see three ways of going forward from here. (1) Something like this patch needs to go in (assuming it jives with Unionfs), (2) we need to make a change to the fsstack API for more fine-grained control over copying attributes (e.g., by also including a callback function for calculating the right file size, which will require some more work on both eCryptfs and Unionfs), or (3) the fsstack patch on eCryptfs (commit 0cc72dc7f050188d8d7344b1dd688cbc68d3cd30 made on Fri Dec 8 02:36:31 2006 -0800) needs to be yanked in 2.6.20. I think the simplest solution, from eCryptfs' perspective, is to just remove the inode size copy. Remove inode size copy in general fsstack attr copy code. Stacked filesystems may need to interpolate the inode size, since the file size in the lower file may be different than the file size in the stacked layer. Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Acked-by: Josef "Jeff" Sipek <jsipek@cs.sunysb.edu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22[PATCH] fs/sysv/: proper prototypes for 2 functionsAdrian Bunk
Add proper prototypes for sysv_{init,destroy}_icache() in sysv.h Signed-off-by: Adrian Bunk <bunk@stusta.de> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-21[PATCH] Fix XFS after clear_page_dirty() removalDavid Chinner
XFS appears to call clear_page_dirty to get the mapping tree dirty tag set correctly at the same time the page dirty flag is cleared. I note that this can be done by set_page_writeback() if we clear the dirty flag on the page first when we are writing back the entire page. Hence it seems to me that the XFS call to clear_page_dirty() could easily be substituted by clear_page_dirty_for_io() followed by a call to set_page_writeback() to get the mapping tree tags set correctly after the page has been marked clean. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-21[PATCH] fuse: remove clear_page_dirty() callMiklos Szeredi
The use by FUSE was just a remnant of an optimization from the time when writable mappings were supported. Now FUSE never actually allows the creation of dirty pages, so this invocation of clear_page_dirty() is effectively a no-op. Signed-off-by: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-21[PATCH] Fix JFS after clear_page_dirty() removalDave Kleikamp
This patch removes some questionable code that attempted to make a no-longer-used page easier to reclaim. Calling metapage_writepage against such a page will not result in any I/O being performed, so removing this code shouldn't be a big deal. [ It's likely that we could have just replaced the "clear_page_dirty()" call with a call to "cancel_dirty_page()" instead, but in the meantime this is cleaner and simpler anyway, so unless there is some overriding reason (and Dave implies there isn't) I'll just use this patch as-is. - Linus ] Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-21VM: Remove "clear_page_dirty()" and "test_clear_page_dirty()" functionsLinus Torvalds
They were horribly easy to mis-use because of their tempting naming, and they also did way more than any users of them generally wanted them to do. A dirty page can become clean under two circumstances: (a) when we write it out. We have "clear_page_dirty_for_io()" for this, and that function remains unchanged. In the "for IO" case it is not sufficient to just clear the dirty bit, you also have to mark the page as being under writeback etc. (b) when we actually remove a page due to it becoming inaccessible to users, notably because it was truncate()'d away or the file (or metadata) no longer exists, and we thus want to cancel any outstanding dirty state. For the (b) case, we now introduce "cancel_dirty_page()", which only touches the page state itself, and verifies that the page is not mapped (since cancelling writes on a mapped page would be actively wrong as it is still accessible to users). Some filesystems need to be fixed up for this: CIFS, FUSE, JFS, ReiserFS, XFS all use the old confusing functions, and will be fixed separately in subsequent commits (with some of them just removing the offending logic, and others using clear_page_dirty_for_io()). This was confirmed by Martin Michlmayr to fix the apt database corruption on ARM. Cc: Martin Michlmayr <tbm@cyrius.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Hugh Dickins <hugh@veritas.com> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Arjan van de Ven <arjan@infradead.org> Cc: Andrei Popa <andrei.popa@i-neo.ro> Cc: Andrew Morton <akpm@osdl.org> Cc: Dave Kleikamp <shaggy@linux.vnet.ibm.com> Cc: Gordon Farquharson <gordonfarquharson@gmail.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-21Clean up and make try_to_free_buffers() not race with dirty pagesLinus Torvalds
This is preparatory work in our continuing saga on some hard-to-trigger file corruption with shared writable mmap() after the dirty page tracking changes (commit d08b3851da41d0ee60851f2c75b118e1f7a5fc89 etc) were merged. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-21[PATCH] fix leaks on pipe(2) failure exitsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-19[JFFS2] add cond_resched() when garbage collecting deletion direntArtem Bityutskiy
We observe soft lockups when doing heavy test which creates directory with a lot of direntries and deletes them. This cycle is the reason fo this. Make it nicer and add cond_resched() inside of it. Signed-off-by: Artem Bityutskiy <dedekind@infradead.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-12-15[GFS2] Fix KconfigSteven Whitehouse
Here is a patch to fix up the Kconfig so that we don't land up with problems when people disable the NET subsystem. Thanks for all the hints and suggestions that people have sent me regarding this. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com> Cc: Aleksandr Koltsoff <czr@iki.fi> Cc: Toralf Förster <toralf.foerster@gmx.de> Cc: Randy Dunlap <randy.dunlap@oracle.com> Cc: Adrian Bunk <bunk@stusta.de> Cc: Chris Zubrzycki <chris@middle--earth.org> Cc: Patrick Caulfield <pcaulfie@redhat.com>
2006-12-15[DLM] fix compile warningPatrick Caulfield
This patch fixes a compile warning in lowcomms-tcp.c indicating that kmem_cache_t is deprecated. Signed-Off-By: Patrick Caulfield <pcaulfie@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-12-13DebugFS : file/directory removal fixMathieu Desnoyers
Fix file and directory removal in debugfs. Add inotify support for file removal. The following scenario : create dir a create dir a/b cd a/b (some process goes in cwd a/b) rmdir a/b rmdir a fails due to the fact that "a" appears to be non empty. It is because the "b" dentry is not deleted from "a" and still in use. The same problem happens if "b" is a file. d_delete is nice enough to know when it needs to unhash and free the dentry if nothing else is using it or, if someone is using it, to remove it from the hash queues and wait for it to be deleted when it has no users. The nice side-effect of this fix is that it calls the file removal notification. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-13DebugFS : more file/directory creation error handlingMathieu Desnoyers
Correct dentry count to handle creation errors. This patch puts a dput at the file creation instead of the file removal : lookup_one_len already returns a dentry with reference count of 1. Then, the dget() in simple_mknod increments it when the dentry is associated with a file. In a scenario where simple_create or simple_mkdir returns an error, this would lead to an unwanted increment of the reference counter, therefore making file removal impossible. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-13DebugFS : file/directory creation error handlingMathieu Desnoyers
Fix error handling of file and directory creation in DebugFS. The error path should release the file system because no _remove will be called for this erroneous creation. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>