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2012-09-26switch SNDRV_PCM_IOCTL_LINK to fget_light()Al Viro1-6/+7
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch timerfd_[sg]ettime(2) to fget_light()Al Viro1-8/+9
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch epoll_wait(2) to fget_light()Al Viro1-3/+3
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch btrfs_ioctl_snap_create_transid() to fget_light()Al Viro1-7/+7
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch EXT4_IOC_MOVE_EXT to fget_light()Al Viro1-3/+3
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26export fget_lightAl Viro1-0/+1
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26ext4: close struct file leak on EXT4_IOC_MOVE_EXTAl Viro1-1/+2
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch hpux_getdents() to fget_light()Al Viro1-3/+3
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch itanic perfmonctl(2) to fget_light()Al Viro1-2/+3
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch osf_getdirentries() to fget_light()Al Viro1-3/+3
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch readahead(2) to fget_light()Al Viro1-2/+3
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch fadvise(2) to fget_light()Al Viro1-2/+3
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch fchmod(2) to fget_light()Al Viro1-7/+5
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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>
2012-09-25ipv6: 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>
2012-09-25ipv6: 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>
2012-09-25c/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>
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