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2008-04-29relayfs: support larger relay bufferMasami Hiramatsu1-3/+32
Use vmalloc() and memset() instead of kcalloc() to allocate a page* array when the array size is bigger than one page. This enables relayfs to support bigger relay buffers than 64MB on 4k-page system, 512MB on 16k-page system. [akpm@linux-foundation.org: cleanup] Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Cc: David Wilder <dwilder@us.ibm.com> Reviewed-by: Tom Zanussi <zanussi@comcast.net> Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29relay: fix splice problemTom Zanussi1-1/+1
Splice isn't always incrementing the ppos correctly, which broke relay splice. Signed-off-by: Tom Zanussi <zanussi@comcast.net> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-03-26relay: set an spd_release() hook for spliceJens Axboe1-0/+5
relay doesn't reference the pages it adds, however we need a non-NULL hook or splice_to_pipe() can oops. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-03-26set relay file can not be read by pread(2)Lai Jiangshan1-1/+1
I found that relay files can be read by pread(2). I fix it, for relay files are not capable of seeking. Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-03-17relay: fix subbuf_splice_actor() adding too many pagesJens Axboe1-2/+3
If subbuf_pages was larger than the max number of pages the pipe buffer will hold, subbuf_splice_actor() would happily go beyond the array size. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-02-06relay: nopageNick Piggin1-15/+9
Convert relay from nopage to fault. Remove redundant vma range checks. Switch from OOM to SIGBUS if the resource is not available. Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: Tom Zanussi <zanussi@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-04vm audit: add VM_DONTEXPAND to mmap for drivers that need itNick Piggin1-0/+1
Drivers that register a ->fault handler, but do not range-check the offset argument, must set VM_DONTEXPAND in the vm_flags in order to prevent an expanding mremap from overflowing the resource. I've audited the tree and attempted to fix these problems (usually by adding VM_DONTEXPAND where it is not obvious). Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-18whitespace fixes: relayfsDaniel Walker1-3/+3
Signed-off-by: Daniel Walker <dwalker@mvista.com> Cc: Tom Zanussi <zanussi@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-31Fix a use after free bug in kernel->userspace relay file supportJesper Juhl1-1/+2
Coverity spotted what looks like a real possible case of using a variable after it has been freed. The problem is in kernel/relay.c::relay_open_buf() If the code hits "goto free_buf;" it ends up in this code : free_buf: relay_destroy_buf(buf); <--- calls kfree() on 'buf'. free_name: kfree(tmpname); end: return buf; <-- use after free of 'buf'. I read through the callers and they all handle a NULL return from this function as an error (and hitting the 'free_buf' label only happens on failure to chan->cb->create_buf_file(), so that looks like a clear error to me). The patch simply sets 'buf' to NULL after the call to relay_destroy_buf(buf); - as far as I can see that should take care of the problem. The patch also corrects a reference to a documentation file while I was at it. Note from Mathieu: the documentation reference change should have been done in a separate patch, but I guess no one will really care. Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com> Acked-by: "David J. Wilder" <wilder@us.ibm.com> Tested-by: "David J. Wilder" <wilder@us.ibm.com> Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Tom Zanussi <zanussi@us.ibm.com> Cc: Karim Yaghmour <karim@opersys.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-19kernel/relay.c: make functions staticAdrian Bunk1-7/+6
Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: Tom Zanussi <zanussi@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-13relay: fixup kerneldoc commentTom Zanussi1-1/+1
Change comment from kerneldoc to normal. Signed-off-by: Tom Zanussi <zanussi@us.ibm.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-07-13relay: fix bogus cast in subbuf_splice_actor()Tom Zanussi1-1/+3
The current code that sets the read position in subbuf_splice_actor may give erroneous results if the buffer size isn't a power of 2. This patch fixes the problem. Signed-off-by: Tom Zanussi <zanussi@us.ibm.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-07-10pipe: change the ->pin() operation to ->confirm()Jens Axboe1-1/+1
The name 'pin' was badly chosen, it doesn't pin a pipe buffer in the most commonly used sense in the kernel. So change the name to 'confirm', after debating this issue with Hugh Dickins a bit. A good return from ->confirm() means that the buffer is really there, and that the contents are good. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-07-10relay: use splice_to_pipe() instead of open-coding the pipe loopJens Axboe1-91/+55
It cleans up the relay splice implementation a lot, and gets rid of a lot of internal pipe knowledge that should not be in there. Plus fixes for padding and partial first page (and lots more) from Tom Zanussi. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-07-10splice: divorce the splice structure/function definitions from the pipe headerJens Axboe1-1/+1
We need to move even more stuff into the header so that folks can use the splice_to_pipe() implementation instead of open-coding a lot of pipe knowledge (see relay implementation), so move to our own header file finally. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-07-10splice: relay supportTom Zanussi1-50/+191
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-06-28relayfs: fix overwritesMasami Hiramatsu1-2/+6
When I use relayfs with "overwrite" mode, read() still sets incorrect number of consumed bytes. Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Acked-by: Tom Zanussi <zanussi@us.ibm.com> Acked-by: David Wilder <dwilder@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-06-28relay file read: start-pos fixDavid Wilder1-0/+3
Fix a bug in the relay read interface causing the number of consumed bytes to be set incorrectly. Signed-off-by: Tom Zanussi <zanussi@us.ibm.com> Signed-off-by: David Wilder <dwilder@us.ibm.com> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-09Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivialLinus Torvalds1-1/+1
* git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial: (25 commits) sound: convert "sound" subdirectory to UTF-8 MAINTAINERS: Add cxacru website/mailing list include files: convert "include" subdirectory to UTF-8 general: convert "kernel" subdirectory to UTF-8 documentation: convert the Documentation directory to UTF-8 Convert the toplevel files CREDITS and MAINTAINERS to UTF-8. remove broken URLs from net drivers' output Magic number prefix consistency change to Documentation/magic-number.txt trivial: s/i_sem /i_mutex/ fix file specification in comments drivers/base/platform.c: fix small typo in doc misc doc and kconfig typos Remove obsolete fat_cvf help text Fix occurrences of "the the " Fix minor typoes in kernel/module.c Kconfig: Remove reference to external mqueue library Kconfig: A couple of grammatical fixes in arch/i386/Kconfig Correct comments in genrtc.c to refer to correct /proc file. Fix more "deprecated" spellos. Fix "deprecated" typoes. ... Fix trivial comment conflict in kernel/relay.c.
2007-05-09Add suspend-related notifications for CPU hotplugRafael J. Wysocki1-0/+2
Since nonboot CPUs are now disabled after tasks and devices have been frozen and the CPU hotplug infrastructure is used for this purpose, we need special CPU hotplug notifications that will help the CPU-hotplug-aware subsystems distinguish normal CPU hotplug events from CPU hotplug events related to a system-wide suspend or resume operation in progress. This patch introduces such notifications and causes them to be used during suspend and resume transitions. It also changes all of the CPU-hotplug-aware subsystems to take these notifications into consideration (for now they are handled in the same way as the corresponding "normal" ones). [oleg@tv-sign.ru: cleanups] Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Cc: Gautham R Shenoy <ego@in.ibm.com> Cc: Pavel Machek <pavel@ucw.cz> Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-09relay: use plain timer instead of delayed workTom Zanussi1-19/+16
relay doesn't need to use schedule_delayed_work() for waking readers when a simple timer will do. Signed-off-by: Tom Zanussi <zanussi@comcast.net> Cc: Satyam Sharma <satyam.sharma@gmail.com> Cc: Oleg Nesterov <oleg@tv-sign.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-09Fix occurrences of "the the "Michael Opdenacker1-1/+1
Signed-off-by: Michael Opdenacker <michael@free-electrons.com> Signed-off-by: Adrian Bunk <bunk@stusta.de>
2007-03-01[PATCH] kernel-doc fixes for 2.6.20-git15 (non-drivers)Randy Dunlap1-2/+1
Fix kernel-doc warnings in 2.6.20-git15 (lib/, mm/, kernel/, include/). Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-11[PATCH] Numerous fixes to kernel-doc info in source files.Robert P. J. Day1-6/+6
A variety of (mostly) innocuous fixes to the embedded kernel-doc content in source files, including: * make multi-line initial descriptions single line * denote some function names, constants and structs as such * change erroneous opening '/*' to '/**' in a few places * reword some text for clarity Signed-off-by: Robert P. J. Day <rpjday@mindspring.com> Cc: "Randy.Dunlap" <rdunlap@xenotime.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-11[PATCH] Relay: add CPU hotplug supportMathieu Desnoyers1-53/+127
Mathieu originally needed to add this for tracing Xen, but it's something that's needed for any application that can be tracing while cpus are added. unplug isn't supported by this patch. The thought was that at minumum a new buffer needs to be added when a cpu comes up, but it wasn't worth the effort to remove buffers on cpu down since they'd be freed soon anyway when the channel was closed. [zanussi@us.ibm.com: avoid lock_cpu_hotplug deadlock] Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Tom Zanussi <zanussi@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2006-12-22[PATCH] relay: remove inliningAndrew Morton1-8/+7
text data bss dec hex filename before: 4036 44 0 4080 ff0 kernel/relay.o after: 3727 44 0 3771 ebb kernel/relay.o Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Tom Zanussi <zanussi@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22[PATCH] fix kernel-doc warnings in 2.6.20-rc1Randy Dunlap1-1/+1
Fix kernel-doc warnings in 2.6.20-rc1. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-13[PATCH] Fix numerous kcalloc() calls, convert to kzalloc()Robert P. J. Day1-2/+2
All kcalloc() calls of the form "kcalloc(1,...)" are converted to the equivalent kzalloc() calls, and a few kcalloc() calls with the incorrect ordering of the first two arguments are fixed. Signed-off-by: Robert P. J. Day <rpjday@mindspring.com> Cc: Jeff Garzik <jeff@garzik.org> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: Adam Belay <ambx1@neo.rr.com> Cc: James Bottomley <James.Bottomley@steeleye.com> Cc: Greg KH <greg@kroah.com> Cc: Mark Fasheh <mark.fasheh@oracle.com> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Cc: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-08[PATCH] kernel: change uses of f_{dentry, vfsmnt} to use f_pathJosef "Jeff" Sipek1-2/+2
Change all the uses of f_{dentry,vfsmnt} to f_path.{dentry,mnt} in linux/kernel/. Signed-off-by: Josef "Jeff" Sipek <jsipek@cs.sunysb.edu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07[PATCH] struct seq_operations and struct file_operations constificationHelge Deller1-1/+1
- move some file_operations structs into the .rodata section - move static strings from policy_types[] array into the .rodata section - fix generic seq_operations usages, so that those structs may be defined as "const" as well [akpm@osdl.org: couple of fixes] Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-11-22WorkStruct: make allyesconfigDavid Howells1-4/+6
Fix up for make allyesconfig. Signed-Off-By: David Howells <dhowells@redhat.com>
2006-10-10[PATCH] make kernel/relay.c __user-cleanAl Viro1-19/+22
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-09-29[PATCH] kernel-doc for relay interfaceRandy Dunlap1-14/+22
Add relay interface support to DocBook/kernel-api.tmpl. Fix typos etc. in relay.c and relayfs.txt. Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Acked-by: Tom Zanussi <zanussi@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-09-27[PATCH] inode_diet: Replace inode.u.generic_ip with inode.i_privateTheodore Ts'o1-1/+1
The following patches reduce the size of the VFS inode structure by 28 bytes on a UP x86. (It would be more on an x86_64 system). This is a 10% reduction in the inode size on a UP kernel that is configured in a production mode (i.e., with no spinlock or other debugging functions enabled; if you want to save memory taken up by in-core inodes, the first thing you should do is disable the debugging options; they are responsible for a huge amount of bloat in the VFS inode structure). This patch: The filesystem or device-specific pointer in the inode is inside a union, which is pretty pointless given that all 30+ users of this field have been using the void pointer. Get rid of the union and rename it to i_private, with a comment to explain who is allowed to use the void pointer. This is just a cleanup, but it allows us to reuse the union 'u' for something something where the union will actually be used. [judith@osdl.org: powerpc build fix] Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Judith Lebzelter <judith@osdl.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-23[PATCH] relay: consolidate sendfile() and read() codeTom Zanussi1-84/+91
Signed-off-by: Jens Axboe <axboe@suse.de>
2006-03-23[PATCH] relay: add sendfile() supportJens Axboe1-29/+115
Signed-off-by: Jens Axboe <axboe@suse.de>
2006-03-23[PATCH] relay: migrate from relayfs to a generic relay APIJens Axboe1-0/+919
Original patch from Paul Mundt, sysfs parts removed by me since they were broken. Signed-off-by: Jens Axboe <axboe@suse.de>
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