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2006-07-10[PATCH] FDPIC: Add coredump capability for the ELF-FDPIC binfmtDavid Howells
Add coredump capability for the ELF-FDPIC binfmt. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-10[PATCH] FDPIC: Move roundup() into linux/kernel.hDavid Howells
Move the roundup() macro from binfmt_elf.c into linux/kernel.h as it's generally useful. [akpm@osdl.org: nuke all the other implementations] Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-10[PATCH] FDPIC: Adjust the ELF-FDPIC driver to conform more to the CodingStyleDavid Howells
Adjust the ELF-FDPIC binfmt driver to conform much more to the CodingStyle, silly though it may be. Further changes: (*) Drop the casts to long for addresses in kdebug() statements (they're unsigned long already). (*) Use extra variables to avoid expressions longer than 80 chars by splitting the statement into multiple statements and letting the compiler optimise them back together. (*) Eliminate duplicate call of ksize() when working out how much space was actually allocated for the stack. (*) Discard the commented-out load_shlib prototype and op pointer as this will not be supported in ELF-FDPIC for the foreseeable future. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-10[PATCH] NOMMU: Fix execution off of ramfs with mmap()David Howells
Fix execution through the FDPIC binfmt of programs stored on ramfs by preventing the ramfs mmap() returning successfully on a private mapping of a ramfs file. This causes NOMMU mmap to make a copy of the mapped portion of the file and map that instead. This could be improved by granting direct mapping access to read-only private mappings for which the data is stored on a contiguous run of pages. However, this is only likely to be the case if the file was extended with truncate before being written. ramfs is left to map the file directly for shared mappings so that SYSV IPC and POSIX shared memory both still work. Signed-off-by: David Howells <dhowells@redhat.com> Cc: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-10[PATCH] FDPIC: Fix FDPIC compile errorsDavid Howells
Fix FDPIC compile errors. (akpm: we suspect it fixes a warning) Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-10[PATCH] mmap zero-length hugetlb file with PROT_NONE to protect a hugetlb ↵Zhang, Yanmin
virtual area Sometimes, applications need below call to be successful although "/mnt/hugepages/file1" doesn't exist. fd = open("/mnt/hugepages/file1", O_CREAT|O_RDWR, 0755); *addr = mmap(NULL, 0x1024*1024*256, PROT_NONE, 0, fd, 0); As for regular pages (or files), above call does work, but as for huge pages, above call would fail because hugetlbfs_file_mmap would fail if (!(vma->vm_flags & VM_WRITE) && len > inode->i_size). This capability on huge page is useful on ia64 when the process wants to protect one area on region 4, so other threads couldn't read/write this area. A famous JVM (Java Virtual Machine) implementation on IA64 needs the capability. Signed-off-by: Zhang Yanmin <yanmin.zhang@intel.com> Cc: David Gibson <david@gibson.dropbear.id.au> Cc: Hugh Dickins <hugh@veritas.com> [ Expand-on-mmap semantics again... this time matching normal fs's. wli ] Acked-by: William Lee Irwin III <wli@holomorphy.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-10[PATCH] fs/read_write.c: EXPORT_UNUSED_SYMBOLAdrian Bunk
This patch marks an unused export as EXPORT_UNUSED_SYMBOL. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-10[PATCH] partitions: let partitions inherit policy from diskPeter Oberparleiter
Change the partition code in fs/partitions/check.c to initialize a newly detected partition's policy field with that of the containing block device (see patch below). My reasoning is that function set_disk_ro() in block/genhd.c modifies the policy field (read-only indicator) of a disk and all contained partitions. When a partition is detected after the call to set_disk_ro(), the policy field of this partition will currently not inherit the disk's policy field. This behavior poses a problem in cases where a block device can be 'logically de- and reactivated' like e.g. the s390 DASD driver because partition detection may run after the policy field has been modified. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Acked-by: Al Viro <viro@ftp.linux.org.uk> Makes-sense-to: Jens Axboe <axboe@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-10[PATCH] reiserfs: fix journaling issue regarding fsync()Hisashi Hifumi
When write() extends a file(i_size is increased) and fsync() is called, change of inode must be written to journaling area through fsync(). But,currently the i_trans_id is not correctly updated when i_size is increased. So fsync() does not kick the journal writer. Reiserfs_file_write() already updates the transaction when blocks are allocated, but the case when i_size increases and new blocks are not added is not correctly treated. Following patch fix this bug. Signed-off-by: Hisashi Hifumi <hifumi.hisashi@oss.ntt.co.jp> Cc: Jeff Mahoney <jeffm@suse.com> Cc: Chris Mason <mason@suse.com> Cc: Hans Reiser <reiser@namesys.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-05Merge branch 'locks'Trond Myklebust
2006-07-05NFS: Optimise away an excessive GETATTR call when a file is symlinkedTrond Myklebust
In the case when compiling via a symlink tree, we want to ensure that the close-to-open GETATTR call is applied only to the final file, and not to the symlink. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2006-07-05NFS: Fix NFS page_state usageTrond Myklebust
The introduction of the FLUSH_INVALIDATE argument to nfs_sync_inode_wait() does not clear the nr_unstable page state counter for pages that are being released. Also fix a longstanding similar bug when nfs_commit_list() fails. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2006-07-05NLM,NFSv4: Wait on local locks before we put RPC calls on the wireTrond Myklebust
Use FL_ACCESS flag to test and/or wait for local locks before we try requesting a lock from the server Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2006-07-05VFS: Add support for the FL_ACCESS flag to flock_lock_file()Trond Myklebust
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2006-07-05NFSv4: Ensure nfs4_lock_expired() caches delegated locksTrond Myklebust
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2006-07-05NLM,NFSv4: Don't put UNLOCK requests on the wire unless we hold a lockTrond Myklebust
Use the new behaviour of {flock,posix}_file_lock(F_UNLCK) to determine if we held a lock, and only send the RPC request to the server if this was the case. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2006-07-05VFS: Allow caller to determine if BSD or posix locks were actually freedTrond Myklebust
Change posix_lock_file_conf(), and flock_lock_file() so that if called with an F_UNLCK argument, and the FL_EXISTS flag they will indicate whether or not any locks were actually freed by returning 0 or -ENOENT. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2006-07-05Merge branch 'master' of /home/trondmy/kernel/linux-2.6/Trond Myklebust
2006-07-03[PATCH] uclinux: fix proc_task()/get_proc-task() namingGreg Ungerer
Fix changed name of proc_task() to get_proc_task(). Signed-off-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-03Merge git://git.infradead.org/mtd-2.6Linus Torvalds
* git://git.infradead.org/mtd-2.6: [JFFS2][XATTR] Fix memory leak in POSIX-ACL support fs/jffs2/: make 2 functions static [MTD] NAND: Fix broken sharpsl driver [JFFS2][XATTR] Fix xd->refcnt race condition MTD: kernel-doc fixes + additions MTD: fix all kernel-doc warnings [MTD] DOC: Fixup read functions and do a little cleanup
2006-07-03[PATCH] sched: cleanup, remove task_t, convert to struct task_structIngo Molnar
cleanup: remove task_t and convert all the uses to struct task_struct. I introduced it for the scheduler anno and it was a mistake. Conversion was mostly scripted, the result was reviewed and all secondary whitespace and style impact (if any) was fixed up by hand. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-03[PATCH] lockdep: annotate blkdev nestingIngo Molnar
Teach special (recursive) locking code to the lock validator. Effects on non-lockdep kernels: - the introduction of the following function variants: extern struct block_device *open_partition_by_devnum(dev_t, unsigned); extern int blkdev_put_partition(struct block_device *); static int blkdev_get_whole(struct block_device *bdev, mode_t mode, unsigned flags); which on non-lockdep are the same as open_by_devnum(), blkdev_put() and blkdev_get(). - a subclass parameter to do_open(). [unused on non-lockdep] - a subclass parameter to __blkdev_put(), which is a new internal function for the main blkdev_put*() functions. [parameter unused on non-lockdep kernels, except for two sanity check WARN_ON()s] these functions carry no semantical difference - they only express object dependencies towards the lockdep subsystem. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Cc: Neil Brown <neilb@cse.unsw.edu.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-03[PATCH] lockdep: annotate sb ->s_umountArjan van de Ven
The s_umount rwsem needs to be classified as per-superblock since it's perfectly legit to keep multiple of those recursively in the VFS locking rules. Has no effect on non-lockdep kernels. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-03[PATCH] lockdep: annotate ->s_lockIngo Molnar
Teach special (per-filesystem) locking code to the lock validator. Minimal effect on non-lockdep kernels: one extra parameter to alloc_super(). Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-03[PATCH] lockdep: annotate the quota codeArjan van de Ven
The quota code plays interesting games with the lock ordering; to quote Jan: | i_mutex of inode containing quota file is acquired after all other | quota locks. i_mutex of all other inodes is acquired before quota | locks. Quota code makes sure (by resetting inode operations and | setting special flag on inode) that noone tries to enter quota code | while holding i_mutex on a quota file... The good news is that all of this special case i_mutex grabbing happens in the (per filesystem) low level quota write function. For this special case we need a new I_MUTEX_* nesting level, since this just entirely outside any of the regular VFS locking rules for i_mutex. I trust Jan on his blue eyes that this is not ever going to deadlock; and based on that the patch below is what it takes to inform lockdep of these very interesting new locking rules. The new locking rule for the I_MUTEX_QUOTA nesting level is that this is the deepest possible level of nesting for i_mutex, and that this only should be used in quota write (and possibly read) function of filesystems. This makes the lock ordering of the I_MUTEX_* levels: I_MUTEX_PARENT -> I_MUTEX_CHILD -> I_MUTEX_NORMAL -> I_MUTEX_QUOTA Has no effect on non-lockdep kernels. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Acked-by: Ingo Molnar <mingo@elte.hu> Cc: Jan Kara <jack@ucw.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-03[PATCH] lockdep: annotate NTFS locking rulesIngo Molnar
NTFS uses lots of type-opaque objects which acquire their true identity runtime - so the lock validator needs to be helped in a couple of places to figure out object types. Many thanks to Anton Altaparmakov for giving lots of explanations about NTFS locking rules. Has no effect on non-lockdep kernels. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Anton Altaparmakov <aia21@cantab.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-03[PATCH] lockdep: annotate i_mutexIngo Molnar
Teach special (recursive) locking code to the lock validator. Has no effect on non-lockdep kernels. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-03[PATCH] lockdep: annotate dcacheIngo Molnar
Teach special (recursive) locking code to the lock validator. Has no effect on non-lockdep kernels. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-03[PATCH] lockdep: annotate direct ioIngo Molnar
Teach special (rwsem-in-irq) locking code to the lock validator. Has no effect on non-lockdep kernels. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-03[PATCH] lockdep: locking init debugging improvementIngo Molnar
Locking init improvement: - introduce and use __SPIN_LOCK_UNLOCKED for array initializations, to pass in the name string of locks, used by debugging Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-03[PATCH] binfmt_elf: fix checks for bad addressChuck Ebbert
Fix check for bad address; use macro instead of open-coding two checks. Taken from RHEL4 kernel update. From: Ernie Petrides <petrides@redhat.com> For background, the BAD_ADDR() macro should return TRUE if the address is TASK_SIZE, because that's the lowest address that is *not* valid for user-space mappings. The macro was correct in binfmt_aout.c but was wrong for the "equal to" case in binfmt_elf.c. There were two in-line validations of user-space addresses in binfmt_elf.c, which have been appropriately converted to use the corrected BAD_ADDR() macro in the patch you posted yesterday. Note that the size checks against TASK_SIZE are okay as coded. The additional changes that I propose are below. These are in the error paths for bad ELF entry addresses once load_elf_binary() has already committed to exec'ing the new image (following the tearing down of the task's original address space). The 1st hunk deals with the interp-side of the outer "if". There were two problems here. The printk() should be removed because this path can be triggered at will by a bogus interpreter image created and used by a malicious user. Further, the error code should not be ENOEXEC, because that causes the loop in search_binary_handler() to continue trying other exec handlers (twice, in fact). But it's too late for this to work correctly, because the user address space has already been torn down, and an exec() failure cannot be returned to the user code because the code no longer exists. The only recovery is to force a SIGSEGV, but it's best to terminate the search loop immediately. I somewhat arbitrarily chose EINVAL as a fallback error code, but any error returned by load_elf_interp() will override that (but this value will never be seen by user-space). The 2nd hunk deals with the non-interp-side of the outer "if". There were two problems here as well. The SIGSEGV needs to be forced, because a prior sigaction() syscall might have set the associated disposition to SIG_IGN. And the ENOEXEC should be changed to EINVAL as described above. Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com> Signed-off-by: Ernie Petrides <petrides@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-03Merge branch 'master' of /home/trondmy/kernel/linux-2.6/Trond Myklebust
2006-07-02[PATCH] nfs: non-procfs build fixDominik Hackl
This fixes a bug in fs/nfs which makes it impossible to build nfs without having procfs enabled. Signed-off-by: Dominik Hackl <dominik@hackl.dhs.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-02[JFFS2][XATTR] Fix memory leak in POSIX-ACL supportKaiGai Kohei
jffs2_clear_acl() which releases acl caches allocated by kmalloc() was defined but it was never called. Thus, we faced to the risk of memory leaking. This patch plugs jffs2_clear_acl() into jffs2_do_clear_inode(). It ensures to release acl cache when inode is cleared. Signed-off-by: KaiGai Kohei <kaigai@ak.jp.nec.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-07-01[PATCH] reiserfs: update ctime and mtime on expanding truncateVladimir Saveliev
Reiserfs does not update ctime and mtime on expanding truncate via truncate(). This patch fixes it. Signed-off-by: Vladimir Saveliev <vs@namesys.com> Cc: Hans Reiser <reiser@namesys.com> Cc: Michael Kerrisk <mtk-manpages@gmx.net> Cc: Chris Mason <mason@suse.com> Cc: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-01[PATCH] ufs: truncate should allocate block for last byteEvgeniy Dushistov
This patch fixes buggy behaviour of UFS in such kind of scenario: open(, O_TRUNC...) ftruncate(, 1024) ftruncate(, 0) Such a scenario causes ufs_panic and remount read-only. This happen because of according to specification UFS should always allocate block for last byte, and many parts of our implementation rely on this, but `ufs_truncate' doesn't care about this. To make possible return error code and to know about old size, this patch removes `truncate' from ufs inode_operations and uses `setattr' method to call ufs_truncate. Signed-off-by: Evgeniy Dushistov <dushistov@mail.ru> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-30Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivialLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial: Remove obsolete #include <linux/config.h> remove obsolete swsusp_encrypt arch/arm26/Kconfig typos Documentation/IPMI typos Kconfig: Typos in net/sched/Kconfig v9fs: do not include linux/version.h Documentation/DocBook/mtdnand.tmpl: typo fixes typo fixes: specfic -> specific typo fixes in Documentation/networking/pktgen.txt typo fixes: occuring -> occurring typo fixes: infomation -> information typo fixes: disadvantadge -> disadvantage typo fixes: aquire -> acquire typo fixes: mecanism -> mechanism typo fixes: bandwith -> bandwidth fix a typo in the RTC_CLASS help text smb is no longer maintained Manually merged trivial conflict in arch/um/kernel/vmlinux.lds.S
2006-06-30[PATCH] knfsd: nfsd: mark rqstp to prevent use of sendfile in privacy caseJ. Bruce Fields
Add a rq_sendfile_ok flag to svc_rqst which will be cleared in the privacy case so that the wrapping code will get copies of the read data instead of real page cache pages. This makes life simpler when we encrypt the response. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-30[PATCH] knfsd: nfsd4: fix open flag passingJ. Bruce Fields
Since nfsv4 actually keeps around the file descriptors it gets from open (instead of just using them for a single read or write operation), we need to make sure that we can do RDWR opens and not just RDONLY/WRONLY. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-30[PATCH] knfsd: nfsd4: fix some open argument testsJ. Bruce Fields
These tests always returned true; clearly that wasn't what was intended. In keeping with kernel style, make them functions instead of macros while we're at it. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-30[PATCH] knfsd: nfsd: fix misplaced fh_unlock() in nfsd_link()David M. Richter
In the event that lookup_one_len() fails in nfsd_link(), fh_unlock() is skipped and locks are held overlong. Patch was tested on 2.6.17-rc2 by causing lookup_one_len() to fail and verifying that fh_unlock() gets called appropriately. Signed-off-by: David M. Richter <richterd@citi.umich.edu> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-30[PATCH] knfsd: nfsd4: remove superfluous grace period checksJ. Bruce Fields
We're checking nfs_in_grace here a few times when there isn't really any reason to--bad_stateid is probably the more sensible return value anyway. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-30[PATCH] knfsd: nfsd: call nfsd_setuser() on fh_compose(), fix nfsd4 ↵J. Bruce Fields
permissions problem In the typical v2/v3 case the only new filehandles used as arguments to operations are filehandles taken directly off the wire, which don't get dentries until fh_verify() is called. But in v4 the filehandles that are arguments to operations were often created by previous operations (putrootfh, lookup, etc.) using fh_compose, which sets the dentry in the filehandle without calling nfsd_setuser(). This also means that, for example, if filesystem B is mounted on filesystem A, and filesystem A is exported without root-squashing, then a client can bypass the rootsquashing on B using a compound that starts at a filehandle in A, crosses into B using lookups, and then does stuff in B. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-30[PATCH] knfsd: nfsd4: fix open_confirm lockingJ. Bruce Fields
Fix an improper unlock in an error path. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-30[PATCH] knfsd: ignore ref_fh when crossing a mountpointNeilBrown
nfsd tries to return to a client the same sort of filehandle as was used by the client. This removes some filehandle aliasing issues and means that a server upgrade followed by a downgrade will not confused clients not restarted during that time. However when crossing a mountpoint, the filehandle used for one filesystem doesn't provide any useful information on what sort of filehandle should be used on the other, and can provide misleading information. So if the reference filehandle is on a different filesystem to the one being generated, ignore it. Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-30[PATCH] knfsd: remove noise about filehandle being uptodateNeilBrown
There is a perfectly valid situation where fh_update gets called on an already uptodate filehandle - in nfsd_create_v3 where a CREATE_UNCHECKED finds an existing file and wants to just set the size. We could possible optimise out the call in that case, but the only harm involved is that fh_update prints a warning, so it is easier to remove the warning. Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-30[PATCH] knfsd: fixing missing 'expkey' support for fsid type 3Frank Filz
Type '3' is used for the fsid in filehandles when the device number of the device holding the filesystem has more than 8 bits in either major or minor. Unfortunately expkey_parse doesn't recognise type 3. Fix this. (Slighty modified from Frank's original) Signed-off-by: Frank Filz <ffilzlnx@us.ibm.com> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-30[PATCH] knfsd: improve the test for cross-device-rename in nfsdNeilBrown
Just testing the i_sb isn't really enough, at least the vfsmnt must be the same. Thanks Al. Cc: Al Viro <viro@ftp.linux.org.uk> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-30[PATCH] SELinux: Add security hook definition for getioprio and insert hooksDavid Quigley
Add a new security hook definition for the sys_ioprio_get operation. At present, the SELinux hook function implementation for this hook is identical to the getscheduler implementation but a separate hook is introduced to allow this check to be specialized in the future if necessary. This patch also creates a helper function get_task_ioprio which handles the access check in addition to retrieving the ioprio value for the task. Signed-off-by: David Quigley <dpquigl@tycho.nsa.gov> Acked-by: Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by: James Morris <jmorris@namei.org> Cc: Jens Axboe <axboe@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-30[PATCH] Light weight event countersChristoph Lameter
The remaining counters in page_state after the zoned VM counter patches have been applied are all just for show in /proc/vmstat. They have no essential function for the VM. We use a simple increment of per cpu variables. In order to avoid the most severe races we disable preempt. Preempt does not prevent the race between an increment and an interrupt handler incrementing the same statistics counter. However, that race is exceedingly rare, we may only loose one increment or so and there is no requirement (at least not in kernel) that the vm event counters have to be accurate. In the non preempt case this results in a simple increment for each counter. For many architectures this will be reduced by the compiler to a single instruction. This single instruction is atomic for i386 and x86_64. And therefore even the rare race condition in an interrupt is avoided for both architectures in most cases. The patchset also adds an off switch for embedded systems that allows a building of linux kernels without these counters. The implementation of these counters is through inline code that hopefully results in only a single instruction increment instruction being emitted (i386, x86_64) or in the increment being hidden though instruction concurrency (EPIC architectures such as ia64 can get that done). Benefits: - VM event counter operations usually reduce to a single inline instruction on i386 and x86_64. - No interrupt disable, only preempt disable for the preempt case. Preempt disable can also be avoided by moving the counter into a spinlock. - Handling is similar to zoned VM counters. - Simple and easily extendable. - Can be omitted to reduce memory use for embedded use. References: RFC http://marc.theaimsgroup.com/?l=linux-kernel&m=113512330605497&w=2 RFC http://marc.theaimsgroup.com/?l=linux-kernel&m=114988082814934&w=2 local_t http://marc.theaimsgroup.com/?l=linux-kernel&m=114991748606690&w=2 V2 http://marc.theaimsgroup.com/?t=115014808400007&r=1&w=2 V3 http://marc.theaimsgroup.com/?l=linux-kernel&m=115024767022346&w=2 V4 http://marc.theaimsgroup.com/?l=linux-kernel&m=115047968808926&w=2 Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>