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2012-09-26switch fallocate(2) to fget_light()Al Viro1-3/+3
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch ftruncate(2) to fget_lightAl Viro1-5/+5
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26namei.c: fix BS commentAl Viro1-1/+1
get_write_access() is needed for nfsd, not binfmt_aout (the latter has no business doing anything of that kind, of course) Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26don't leak O_CLOEXEC into ->f_flagsAl Viro2-2/+2
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26procfs: Convert /proc/pid/fdinfo/ handling routines to seq-file v2Cyrill Gorcunov1-48/+64
This patch converts /proc/pid/fdinfo/ handling routines to seq-file which is needed to extend seq operations and plug in auxiliary fdinfo provides from subsystems like eventfd/eventpoll/fsnotify. Note the proc_fd_link no longer call for proc_fd_info, simply because the guts of proc_fd_info() got merged into ->show() of that seq_file Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26procfs: Move /proc/pid/fd[info] handling code to fd.[ch]Cyrill Gorcunov5-387/+416
This patch prepares the ground for further extension of /proc/pid/fd[info] handling code by moving fdinfo handling code into fs/proc/fd.c. I think such move makes both fs/proc/base.c and fs/proc/fd.c easier to read. Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Acked-by: Pavel Emelyanov <xemul@parallels.com> CC: Al Viro <viro@ZenIV.linux.org.uk> CC: Alexey Dobriyan <adobriyan@gmail.com> CC: Andrew Morton <akpm@linux-foundation.org> CC: James Bottomley <jbottomley@parallels.com> CC: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com> CC: Alexey Dobriyan <adobriyan@gmail.com> CC: Matthew Helsley <matt.helsley@gmail.com> CC: "J. Bruce Fields" <bfields@fieldses.org> CC: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26new helper: daemonize_descriptors()Al Viro3-3/+8
descriptor-related parts of daemonize, done right. As the result we simplify the locking rules for ->files - we hold task_lock in *all* cases when we modify ->files. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch spufs/coredump to iterate_fd()Al Viro1-20/+20
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26do_coredump(): make sure that descriptor table isn't sharedAl Viro1-0/+7
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26new helper: iterate_fd()Al Viro5-84/+71
iterates through the opened files in given descriptor table, calling a supplied function; we stop once non-zero is returned. Callback gets struct file *, descriptor number and const void * argument passed to iterator. It is called with files->file_lock held, so it is not allowed to block. tty_io, netprio_cgroup and selinux flush_unauthorized_files() converted to its use. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26make expand_files() and alloc_fd() staticAl Viro3-4/+2
no callers outside of fs/file.c left Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26take __{set,clear}_{open_fd,close_on_exec}() into fs/file.cAl Viro2-20/+20
nobody uses those outside anymore. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch flush_unauthorized_files() to replace_fd()Al Viro1-32/+15
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26new helper: replace_fd()Al Viro3-39/+64
analog of dup2(), except that it takes struct file * as source. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26take purely descriptor-related stuff from fcntl.c to file.cAl Viro3-128/+137
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26take close-on-exec logics to fs/file.c, clean it up a bitAl Viro3-35/+44
... and add cond_resched() there, while we are at it. We can get large latencies as is... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26um: resurrect the right variant of mconsole_proc()Al Viro1-78/+21
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26take descriptor-related part of close() to file.cAl Viro4-53/+31
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26take fget() and friends to fs/file.cAl Viro2-106/+106
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26expose a low-level variant of fd_install() for binderAl Viro3-13/+18
Similar situation to that of __alloc_fd(); do not use unless you really have to. You should not touch any descriptor table other than your own; it's a sure sign of a really bad API design. As with __alloc_fd(), you *must* use a first-class reference to struct files_struct; something obtained by get_files_struct(some task) (let alone direct task->files) will not do. It must be either current->files, or obtained by get_files_struct(current) by the owner of that sucker and given to you. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26move put_unused_fd() and fd_install() to fs/file.cAl Viro2-44/+44
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26trim free_fdtable_rcu()Al Viro1-15/+2
embedded case isn't hit anymore Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26don't bother with call_rcu() in put_files_struct()Al Viro1-9/+5
At that point nobody can see us anyway; everything that looks at files_fdtable(files) is separated from the guts of put_files_struct(files) - either since files is current->files or because we fetched it under task_lock() and hadn't dropped that yet, or because we'd bumped files->count while holding task_lock()... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26move files_struct-related bits from kernel/exit.c to fs/file.cAl Viro3-100/+99
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26new helper: __alloc_fd()Al Viro3-58/+16
Essentially, alloc_fd() in a files_struct we own a reference to. Most of the time wanting to use it is a sign of lousy API design (such as android/binder). It's *not* a general-purpose interface; better that than open-coding its guts, but again, playing with other process' descriptor table is a sign of bad design. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26take rlimit check to callers of expand_files()Al Viro2-7/+12
... except for one in android, where the check is different and already done in caller. No need to recalculate rlimit many times in alloc_fd() either. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26fanotify: sanitize failure exits in copy_event_to_user()Al Viro1-39/+20
* do copy_to_user() before prepare_for_access_response(); that kills the need in remove_access_response(). * don't do fd_install() until we are past the last possible failure exit. Don't use sys_close() on cleanup side - just put_unused_fd() and fput(). Less racy that way... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26events: don't use get_unused_fd_flags() when get_unused_fd() will doAl Viro1-1/+1
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26pipe(2) - race-free error recoveryAl Viro1-9/+22
don't mess with sys_close() if copy_to_user() fails; just postpone fd_install() until we know it hasn't. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26binder: don't allow mmap() by process other than proc->tskAl Viro1-1/+4
we really shouldn't do get_files_struct() on a different process and use it to modify the sucker later on. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26autofs4: don't open-code fd_install()Al Viro1-16/+2
The only difference between autofs_dev_ioctl_fd_install() and fd_install() is __set_close_on_exec() done by the latter. Just use get_unused_fd_flags(O_CLOEXEC) to allocate the descriptor and be done with that... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26make get_unused_fd_flags() a functionAl Viro2-5/+5
... and get_unused_fd() a macro around it Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26unexport sock_map_fd(), switch to sock_alloc_file()Al Viro4-18/+32
Both modular callers of sock_map_fd() had been buggy; sctp one leaks descriptor and file if copy_to_user() fails, 9p one shouldn't be exposing file in the descriptor table at all. Switch both to sock_alloc_file(), export it, unexport sock_map_fd() and make it static. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26take descriptor handling from sock_alloc_file() to callersAl Viro1-22/+40
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26Merge remote branch 'origin' into for-nextAl Viro893-4213/+7372
2012-09-25Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds17-61/+152
Pull more networking fixes from David Miller: 1) Eric Dumazet discovered and fixed what turned out to be a family of bugs. These functions were using pskb_may_pull() which might need to reallocate the linear SKB data buffer, but the callers were not expecting this possibility. The callers have cached pointers to the packet header areas, and would need to reload them if we were to continue using pskb_may_pull(). So they could end up reading garbage. It's easier to just change these RAW4/RAW6/MIP6 routines to use skb_header_pointer() instead of pskb_may_pull(), which won't modify the linear SKB data area. 2) Dave Jone's syscall spammer caught a case where a non-TCP socket can call down into the TCP keepalive code. The case basically involves creating a raw socket with sk_protocol == IPPROTO_TCP, then calling setsockopt(sock_fd, SO_KEEPALIVE, ...) Fixed by Eric Dumazet. 3) Bluetooth devices do not get configured properly while being powered on, resulting in always using legacy pairing instead of SSP. Fix from Andrzej Kaczmarek. 4) Bluetooth cancels delayed work erroneously, put stricter checks in place. From Andrei Emeltchenko. 5) Fix deadlock between cfg80211_mutex and reg_regdb_search_mutex in cfg80211, from Luis R. Rodriguez. 6) Fix interrupt double release in iwlwifi, from Emmanuel Grumbach. 7) Missing module license in bcm87xx driver, from Peter Huewe. 8) Team driver can lose port changed events when adding devices to a team, fix from Jiri Pirko. 9) Fix endless loop when trying ot unregister PPPOE device in zombie state, from Xiaodong Xu. 10) batman-adv layer needs to set MAC address of software device earlier, otherwise we call tt_local_add with it uninitialized. 11) Fix handling of KSZ8021 PHYs, it's matched currently by KS8051 but that doesn't program the device properly. From Marek Vasut. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: ipv6: mip6: fix mip6_mh_filter() ipv6: raw: fix icmpv6_filter() net: guard tcp_set_keepalive() to tcp sockets phy/micrel: Add missing header to micrel_phy.h phy/micrel: Rename KS80xx to KSZ80xx phy/micrel: Implement support for KSZ8021 batman-adv: Fix symmetry check / route flapping in multi interface setups batman-adv: Fix change mac address of soft iface. pppoe: drop PPPOX_ZOMBIEs in pppoe_release team: send port changed when added ipv4: raw: fix icmp_filter() net/phy/bcm87xx: Add MODULE_LICENSE("GPL") to GPL driver iwlwifi: don't double free the interrupt in failure path cfg80211: fix possible circular lock on reg_regdb_search() Bluetooth: Fix not removing power_off delayed work Bluetooth: Fix freeing uninitialized delayed works Bluetooth: mgmt: Fix enabling LE while powered off Bluetooth: mgmt: Fix enabling SSP while powered off
2012-09-25ipv6: mip6: fix mip6_mh_filter()Eric Dumazet1-9/+11
mip6_mh_filter() should not modify its input, or else its caller would need to recompute ipv6_hdr() if skb->head is reallocated. Use skb_header_pointer() instead of pskb_may_pull() Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-09-25Merge tag 'batman-adv-fix-for-davem' of git://git.open-mesh.org/linux-mergeDavid S. Miller2-8/+12
Included fixes: - fix the behaviour of batman-adv in case of virtual interface MAC change event - fix symmetric link check in neighbour selection Signed-off-by: David S. Miller <davem@davemloft.net>
2012-09-25ipv6: raw: fix icmpv6_filter()Eric Dumazet1-11/+10
icmpv6_filter() should not modify its input, or else its caller would need to recompute ipv6_hdr() if skb->head is reallocated. Use skb_header_pointer() instead of pskb_may_pull() and change the prototype to make clear both sk and skb are const. Also, if icmpv6 header cannot be found, do not deliver the packet, as we do in IPv4. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-09-25Merge tag 'sh-for-linus' of git://github.com/pmundt/linux-shLinus Torvalds1-0/+2
Pull SuperH fix from Paul Mundt: "One last minute regression fix.." * tag 'sh-for-linus' of git://github.com/pmundt/linux-sh: sh: pfc: Fix up GPIO mux type reconfig case.
2012-09-25Merge branch 'akpm' (sundry from Andrew)Linus Torvalds4-2/+5
Merge misc fixes from Andrew Morton: "One maintainer change and three bugfixes" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (4 commits) c/r: prctl: fix build error for no-MMU case lib/flex_proportions.c: fix corruption of denominator in flexible proportions checksyscalls: fix "here document" handling pwm-backlight: take over maintenance
2012-09-25c/r: prctl: fix build error for no-MMU caseMark Salter1-0/+1
Commit 1ad75b9e1628 ("c/r: prctl: add minimal address test to PR_SET_MM") added some address checking to prctl_set_mm() used by checkpoint-restore. This causes a build error for no-MMU systems: kernel/sys.c: In function 'prctl_set_mm': kernel/sys.c:1868:34: error: 'mmap_min_addr' undeclared (first use in this function) The test for mmap_min_addr doesn't make a lot of sense for no-MMU code as noted in commit 6e1415467614 ("NOMMU: Optimise away the {dac_,}mmap_min_addr tests"). This patch defines mmap_min_addr as 0UL in the no-MMU case so that the compiler will optimize away tests for "addr < mmap_min_addr". Signed-off-by: Mark Salter <msalter@redhat.com> Reviewed-by: Cyrill Gorcunov <gorcunov@openvz.org> Cc: <stable@vger.kernel.org> [3.6.x] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-09-25lib/flex_proportions.c: fix corruption of denominator in flexible proportionsJan Kara1-1/+1
When racing with CPU hotplug, percpu_counter_sum() can return negative values for the number of observed events. This confuses fprop_new_period(), which uses unsigned type and as a result number of events is set to big *positive* number. From that moment on, things go pear shaped and can result e.g. in division by zero as denominator is later truncated to 32-bits. This bug causes a divide-by-zero oops in bdi_dirty_limit() in Borislav's 3.6.0-rc6 based kernel. Fix the issue by using a signed type in fprop_new_period(). That makes us bail out from the function without doing anything (mistakenly) thinking there are no events to age. That makes aging somewhat inaccurate but getting accurate data would be rather hard. Signed-off-by: Jan Kara <jack@suse.cz> Reported-by: Borislav Petkov <bp@amd64.org> Reported-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> Cc: Wu Fengguang <fengguang.wu@intel.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-09-25checksyscalls: fix "here document" handlingHeiko Carstens1-1/+1
"echo" doesn't read from stdin, therefore the checksyscalls script didn't warn about not implemented system calls anymore since 29dc54c6 ("checksyscalls: Use arch/x86/syscalls/syscall_32.tbl as source"). Use "cat" instead of "echo" which handles this correctly. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Michal Marek <mmarek@suse.cz> Cc: H. Peter Anvin <hpa@linux.intel.com> Cc: Cyrill Gorcunov <gorcunov@openvz.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-09-25pwm-backlight: take over maintenanceThierry Reding1-0/+2
Since the pwm-backlight driver is lacking a proper maintainer and is the heaviest user of the PWM framework I'm taking over maintenance. Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de> Acked-by: Arun Murthy <arun.murthy@stericsson.com> Cc: Matthew Garrett <mjg@redhat.com> Cc: Robert Morell <rmorell@nvidia.com> Cc: Dilan Lee <dilee@nvidia.com> Cc: Axel Lin <axel.lin@gmail.com> Cc: Mark Brown <broonie@opensource.wolfsonmicro.com> Cc: Alexandre Courbot <acourbot@nvidia.com> Acked-by: Sachin Kamat <sachin.kamat@linaro.org> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-09-25sh: pfc: Fix up GPIO mux type reconfig case.Paul Mundt1-0/+2
Some drivers need to switch pin states between GPIO and pin function at runtime, which was inadvertently broken in the pinctrl driver for GPIOs being bound to a specific direction. This fixes up the request path to ensure that previously configured GPIOs don't cause us to inadvertently error out with an unsupported mux on reconfig, which in practice is primarily aimed at trapping pull-up/down users that have yet to be implemented under the new API. Fixes up regressions in the TPU PWM driver, amongst others. Reported-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Tested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2012-09-24Merge branch 'for-davem' of ↵David S. Miller5-4/+29
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless John W. Linville says: ==================== Please pull this last(?) batch of fixes intended for 3.6... For the Bluetooth bits, Gustavo says this: "Here goes probably my last update to 3.6. It includes the two patches you were ok last week(from Andrzej Kaczmarek), those are critical ones, and two other fixes one for a system crash and the other for a missing lockdep annotation." The referenced fixes from Andrzej prevent attempts to configure devices that are powered-off. Along with the Bluetooth fixes, there are a couple of 802.11 fixes. Emmanuel Grumbach gives us an iwlwifi fix to prevent releasing an interrupt twice. Luis R. Rodriguez provides a fix for a possible circular lock dependency in the cfg80211 regulatory enforcement code. All of these have been in linux-next for a few days. I hope they are not too late to make the 3.6 release! ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2012-09-24Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tileLinus Torvalds1-11/+13
Pull tile gxio ABI fix from Chris Metcalf: "This fixes a last-minute change in the Tilera hypervisor ABI for TRIO (PCI root complex) support. We've locked in this ABI going forward and will make sure no further ABI changes like this occur." * git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile: tile: gxio iorpc numbering change for TRIO interface
2012-09-24Merge tag 'vfio-for-linus' of git://github.com/awilliam/linux-vfioLinus Torvalds2-21/+57
Pull vfio fixes from Alex Williamson: "VFIO doc update and virqfd race fix" * tag 'vfio-for-linus' of git://github.com/awilliam/linux-vfio: vfio: Fix virqfd release race vfio: Trivial Documentation correction
2012-09-24Merge tag 'stable/for-linus-3.6-rc7-tag' of ↵Linus Torvalds1-0/+4
git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen Pull a Xen fix from Konrad Rzeszutek Wilk: "It is a bug-fix when we run the initial PV guest on a AMD K8 machine and have CONFIG_AMD_NUMA enabled and detect the NUMA topology from the Northbridge. We end up in the situation where the initial domain gets too much information and gets confused and crashes - the fix is to restrict the domain to get the information - and we do it by just disabling NUMA on the PV guest (the hypervisor is still able to do its proper NUMA allocations of guests). It is OK to disable the PV guest from accessing NUMA data as right now we do not inject any NUMA node information to the PV guests. When we do get to that point, then this patch will have to be reverted." * Disable PV NUMA support as we do not do anything with it (yet) and it can cause bootup crashes on certain AMD machines. * tag 'stable/for-linus-3.6-rc7-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xen/boot: Disable NUMA for PV guests.
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