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2013-05-01proc: Supply an accessor for getting the data from a PDE's parentDavid Howells
Supply an accessor function for getting the private data from the parent proc_dir_entry struct of the proc_dir_entry struct associated with an inode. ReiserFS, for instance, stores the super_block pointer in the proc directory it makes for that super_block, and a pointer to the respective seq_file show function in each of the proc files in that directory. This allows a reduction in the number of file_operations structs, open functions and seq_operations structs required. The problem otherwise is that each show function requires two pieces of data but only has storage for one per PDE (and this has no release function). Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> cc: Jerry Chuang <jerry-chuang@realtek.com> cc: Maxim Mikityanskiy <maxtram95@gmail.com> cc: YAMANE Toshiaki <yamanetoshi@gmail.com> cc: linux-wireless@vger.kernel.org cc: linux-scsi@vger.kernel.org cc: devel@driverdev.osuosl.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-05-01proc: Add proc_mkdir_data()David Howells
Add proc_mkdir_data() to allow procfs directories to be created that are annotated at the time of creation with private data rather than doing this post-creation. This means no access is then required to the proc_dir_entry struct to set this. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> cc: Neela Syam Kolli <megaraidlinux@lsi.com> cc: Jerry Chuang <jerry-chuang@realtek.com> cc: linux-scsi@vger.kernel.org cc: devel@driverdev.osuosl.org cc: linux-wireless@vger.kernel.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-05-01proc: Move some bits from linux/proc_fs.h to linux/{of.h,signal.h,tty.h}David Howells
Move some bits from linux/proc_fs.h to linux/of.h, signal.h and tty.h. Also move proc_tty_init() and proc_device_tree_init() to fs/proc/internal.h as they're internal to procfs. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Grant Likely <grant.likely@secretlab.ca> cc: devicetree-discuss@lists.ozlabs.org cc: linux-arch@vger.kernel.org cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> cc: Jri Slaby <jslaby@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-05-01proc: Move PDE_NET() to fs/proc/proc_net.cDavid Howells
Move PDE_NET() to fs/proc/proc_net.c as that's where the only user is. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-05-01proc: Split the namespace stuff out into linux/proc_ns.hDavid Howells
Split the proc namespace stuff out into linux/proc_ns.h. Signed-off-by: David Howells <dhowells@redhat.com> cc: netdev@vger.kernel.org cc: Serge E. Hallyn <serge.hallyn@ubuntu.com> cc: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-05-01proc: Move proc_fd() to fs/proc/fd.hDavid Howells
Move proc_fd() to fs/proc/fd.h. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-05-01proc: Uninline pid_delete_dentry()David Howells
Uninline pid_delete_dentry() as it's only used by three function pointers. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-05-01proc: Supply PDE attribute setting accessor functionsDavid Howells
Supply accessor functions to set attributes in proc_dir_entry structs. The following are supplied: proc_set_size() and proc_set_user(). Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com> cc: linuxppc-dev@lists.ozlabs.org cc: linux-media@vger.kernel.org cc: netdev@vger.kernel.org cc: linux-wireless@vger.kernel.org cc: linux-pci@vger.kernel.org cc: netfilter-devel@vger.kernel.org cc: alsa-devel@alsa-project.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-29proc: Split kcore bits from linux/procfs.h into linux/kcore.hDavid Howells
Split kcore bits from linux/procfs.h into linux/kcore.h. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Acked-by: Ralf Baechle <ralf@linux-mips.org> cc: linux-mips@linux-mips.org cc: sparclinux@vger.kernel.org cc: x86@kernel.org cc: linux-mm@kvack.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-29Include missing linux/magic.h inclusionsDavid Howells
Include missing linux/magic.h inclusions where the source file is currently expecting to get magic numbers through linux/proc_fs.h. Signed-off-by: David Howells <dhowells@redhat.com> cc: linux-efi@vger.kernel.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-29Include missing linux/slab.h inclusionsDavid Howells
Include missing linux/slab.h inclusions where the source file is currently expecting to get kmalloc() and co. through linux/proc_fs.h. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> cc: linux-s390@vger.kernel.org cc: sparclinux@vger.kernel.org cc: linux-efi@vger.kernel.org cc: linux-mtd@lists.infradead.org cc: devel@driverdev.osuosl.org cc: x86@kernel.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-29proc: Delete create_proc_read_entry()David Howells
Delete create_proc_read_entry() as it no longer has any users. Also delete read_proc_t, write_proc_t, the read_proc member of the proc_dir_entry struct and the support functions that use them. This saves a pointer for every PDE allocated. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-29fanotify: don't wank with FASYNC on ->release()Al Viro
... it's done already by __fput() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-29hppfs: get rid of ->fsync()Al Viro
it has grown by accident - directories there do *not* use page cache, so there's nothing to write. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-29hppfs: fix the leaks on close()Al Viro
we need to close the underlying procfs file and free ->private_data Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-29new helper: read_code()Al Viro
switch binfmts that use ->read() to that (and to kernel_read() in several cases in binfmt_flat - sure, it's nommu, but still, doing ->read() into kmalloc'ed buffer...) Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09try a saner locking for pde_opener...Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09deal with races between remove_proc_entry() and proc_reg_release()Al Viro
* serialize the call of ->release() on per-pdeo mutex * don't remove pdeo from per-pde list until we are through with it Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09procfs: preparations for remove_proc_entry() race fixesAl Viro
* leave ->proc_fops alone; make ->pde_users negative instead * trim pde_opener * move relevant code in fs/proc/inode.c Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09procfs: Clean up huge if-statement in __proc_file_read()David Howells
Switch huge if-statement in __proc_file_read() around. This then puts the single line loop break immediately after the if-statement and allows us to de-indent the huge comment and make it take fewer lines. The code following the if-statement then follows naturally from the call to dp->read_proc(). Signed-off-by: David Howells <dhowells@redhat.com>
2013-04-09proc: Kill create_proc_entry()David Howells
Kill create_proc_entry() in favour of create_proc_read_entry(), proc_create() and proc_create_data(). Signed-off-by: David Howells <dhowells@redhat.com>
2013-04-09constify a bunch of struct file_operations instancesAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09procfs: new helper - PDE_DATA(inode)Al Viro
The only part of proc_dir_entry the code outside of fs/proc really cares about is PDE(inode)->data. Provide a helper for that; static inline for now, eventually will be moved to fs/proc, along with the knowledge of struct proc_dir_entry layout. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09procfs: kill ->write_proc()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09new helper: single_open_size()Al Viro
Same as single_open(), but preallocates the buffer of given size. Doesn't make any sense for sizes up to PAGE_SIZE and doesn't make sense if output of show() exceeds PAGE_SIZE only rarely - seq_read() will take care of growing the buffer and redoing show(). If you _know_ that it will be large, it might make more sense to look into saner iterator, rather than go with single-shot one. If that's impossible, single_open_size() might be for you. Again, don't use that without a good reason; occasionally that's really the best way to go, but very often there are better solutions. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09procfs: don't allow to use proc_create, create_proc_entry, etc. for directoriesAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09reiserfs: use proc_remove_subtree()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09procfs: switch /proc/self away from proc_dir_entryAl Viro
Just have it pinned in dcache all along and let procfs ->kill_sb() drop it before kill_anon_super(). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09mode_t, whack-a-mole at 11...Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09get rid of the last free_pipe_info() callersAl Viro
and rename __free_pipe_info() to free_pipe_info() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09get rid of alloc_pipe_info() argumentAl Viro
not used anymore Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09get rid of pipe->inodeAl Viro
it's used only as a flag to distinguish normal pipes/FIFOs from the internal per-task one used by file-to-file splice. And pipe->files would work just as well for that purpose... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09introduce variants of pipe_lock/pipe_unlock for real pipes/FIFOsAl Viro
fs/pipe.c file_operations methods *know* that pipe is not an internal one; no need to check pipe->inode for those callers. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09pipe: set file->private_data to ->i_pipeAl Viro
simplify get_pipe_info(), while we are at it Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09pipe: don't use ->i_mutexAl Viro
now it can be done - put mutex into pipe_inode_info, use it instead of ->i_mutex Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09pipe: take allocation and freeing of pipe_inode_info out of ->i_mutexAl Viro
* new field - pipe->files; number of struct file over that pipe (all sharing the same inode, of course); protected by inode->i_lock. * pipe_release() decrements pipe->files, clears inode->i_pipe when if the counter has reached 0 (all under ->i_lock) and, in that case, frees pipe after having done pipe_unlock() * fifo_open() starts with grabbing ->i_lock, and either bumps pipe->files if ->i_pipe was non-NULL or allocates a new pipe (dropping and regaining ->i_lock) and rechecks ->i_pipe; if it's still NULL, inserts new pipe there, otherwise bumps ->i_pipe->files and frees the one we'd allocated. At that point we know that ->i_pipe is non-NULL and won't go away, so we can do pipe_lock() on it and proceed as we used to. If we end up failing, decrement pipe->files and if it reaches 0 clear ->i_pipe and free the sucker after pipe_unlock(). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09pipe: preparation to new locking rulesAl Viro
* use the fact that file_inode(file)->i_pipe doesn't change while the file is opened - no locks needed to access that. * switch to pipe_lock/pipe_unlock where it's easy to do Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09pipe: switch wait_for_partner() and wake_up_partner() to pipe_inode_infoAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09pipe: fold file_operations instances in oneAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09fold fifo.c into pipe.cAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09lift sb_start_write out of ->splice_write()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09lift sb_start_write into default_file_splice_write()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09lift sb_start_write() out of ->write()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09switch compat readv/writev variants to COMPAT_SYSCALL_DEFINEAl Viro
... and take to fs/read_write.c Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09f2fs: use mnt_want_write_file() in ioctlAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09lift sb_start_write/sb_end_write out of ->aio_write()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09hpfs: move setting hpfs-private i_dirty to ->write_end()Al Viro
... so that writev(2) doesn't miss it. Get rid of hpfs_file_write(). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09reiserfs: don't wank with EFBIG before calling do_sync_write()Al Viro
look for file_capable() in there... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09fold release_mounts() into namespace_unlock()Al Viro
... and provide namespace_lock() as a trivial wrapper; switch to those two consistently. Result is patterned after rtnl_lock/rtnl_unlock pair. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09switch unlock_mount() to namespace_unlock(), convert all umount_tree() callersAl Viro
which allows to kill the last argument of umount_tree() and make release_mounts() static. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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