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2012-09-26switch vfio_group_set_container() to fget_light()Al Viro1-4/+4
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch btrfs_ioctl_clone() to fget_light()Al Viro1-3/+3
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch mqueue syscalls to fget_light()Al Viro1-12/+14
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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>
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