Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull vfs update from Al Viro:

 - big one - consolidation of descriptor-related logics; almost all of
   that is moved to fs/file.c

   (BTW, I'm seriously tempted to rename the result to fd.c.  As it is,
   we have a situation when file_table.c is about handling of struct
   file and file.c is about handling of descriptor tables; the reasons
   are historical - file_table.c used to be about a static array of
   struct file we used to have way back).

   A lot of stray ends got cleaned up and converted to saner primitives,
   disgusting mess in android/binder.c is still disgusting, but at least
   doesn't poke so much in descriptor table guts anymore.  A bunch of
   relatively minor races got fixed in process, plus an ext4 struct file
   leak.

 - related thing - fget_light() partially unuglified; see fdget() in
   there (and yes, it generates the code as good as we used to have).

 - also related - bits of Cyrill's procfs stuff that got entangled into
   that work; _not_ all of it, just the initial move to fs/proc/fd.c and
   switch of fdinfo to seq_file.

 - Alex's fs/coredump.c spiltoff - the same story, had been easier to
   take that commit than mess with conflicts.  The rest is a separate
   pile, this was just a mechanical code movement.

 - a few misc patches all over the place.  Not all for this cycle,
   there'll be more (and quite a few currently sit in akpm's tree)."

Fix up trivial conflicts in the android binder driver, and some fairly
simple conflicts due to two different changes to the sock_alloc_file()
interface ("take descriptor handling from sock_alloc_file() to callers"
vs "net: Providing protocol type via system.sockprotoname xattr of
/proc/PID/fd entries" adding a dentry name to the socket)

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (72 commits)
  MAX_LFS_FILESIZE should be a loff_t
  compat: fs: Generic compat_sys_sendfile implementation
  fs: push rcu_barrier() from deactivate_locked_super() to filesystems
  btrfs: reada_extent doesn't need kref for refcount
  coredump: move core dump functionality into its own file
  coredump: prevent double-free on an error path in core dumper
  usb/gadget: fix misannotations
  fcntl: fix misannotations
  ceph: don't abuse d_delete() on failure exits
  hypfs: ->d_parent is never NULL or negative
  vfs: delete surplus inode NULL check
  switch simple cases of fget_light to fdget
  new helpers: fdget()/fdput()
  switch o2hb_region_dev_write() to fget_light()
  proc_map_files_readdir(): don't bother with grabbing files
  make get_file() return its argument
  vhost_set_vring(): turn pollstart/pollstop into bool
  switch prctl_set_mm_exe_file() to fget_light()
  switch xfs_find_handle() to fget_light()
  switch xfs_swapext() to fget_light()
  ...

diff --cc arch/alpha/kernel/osf_sys.c
Simple merge

diff --cc arch/ia64/kernel/perfmon.c
Simple merge

diff --cc arch/s390/hypfs/inode.c
Simple merge

diff --cc arch/um/drivers/mconsole_kern.c
Simple merge

diff --cc drivers/infiniband/core/ucma.c
Simple merge

diff --cc drivers/staging/android/binder.c
index b1937ca,f71d624..7b0ba92
--- 1/drivers/staging/android/binder.c
--- 2/drivers/staging/android/binder.c
+++ b/drivers/staging/android/binder.c
@@@ -362,14 -362,9 +362,9 @@@ struct binder_transaction 
  static void
  binder_defer_work(struct binder_proc *proc, enum binder_deferred_state defer);
  
- /*
-  * copied from get_unused_fd_flags
-  */
 -int task_get_unused_fd_flags(struct binder_proc *proc, int flags)
 +static int task_get_unused_fd_flags(struct binder_proc *proc, int flags)
  {
        struct files_struct *files = proc->files;
-       int fd, error;
-       struct fdtable *fdt;
        unsigned long rlim_cur;
        unsigned long irqs;
  

diff --cc drivers/staging/omapdrm/omap_gem.c
Simple merge

diff --cc drivers/tty/tty_io.c
Simple merge

diff --cc drivers/usb/gadget/f_fs.c
Simple merge

diff --cc drivers/video/msm/mdp.c
Simple merge

diff --cc fs/adfs/super.c
Simple merge

diff --cc fs/affs/super.c
Simple merge

diff --cc fs/befs/linuxvfs.c
Simple merge

diff --cc fs/bfs/inode.c
Simple merge

diff --cc fs/btrfs/inode.c
Simple merge

diff --cc fs/btrfs/ioctl.c
Simple merge

diff --cc fs/cifs/cifsfs.c
Simple merge

diff --cc fs/compat_ioctl.c
Simple merge

diff --cc fs/dcache.c
Simple merge

diff --cc fs/ecryptfs/main.c
Simple merge

diff --cc fs/ext3/super.c
Simple merge

diff --cc fs/ext4/super.c
Simple merge

diff --cc fs/fat/inode.c
Simple merge

diff --cc fs/hfs/super.c
Simple merge

diff --cc fs/hpfs/super.c
Simple merge

diff --cc fs/hugetlbfs/inode.c
Simple merge

diff --cc fs/isofs/inode.c
Simple merge

diff --cc fs/jfs/super.c
Simple merge

diff --cc fs/logfs/inode.c
Simple merge

diff --cc fs/minix/inode.c
Simple merge

diff --cc fs/namei.c
Simple merge

diff --cc fs/ncpfs/inode.c
Simple merge

diff --cc fs/ntfs/super.c
Simple merge

diff --cc fs/open.c
Simple merge

diff --cc fs/proc/base.c
Simple merge

diff --cc fs/qnx4/inode.c
Simple merge

diff --cc fs/qnx6/inode.c
Simple merge

diff --cc fs/stat.c
Simple merge

diff --cc fs/sysv/inode.c
Simple merge

diff --cc fs/ubifs/super.c
Simple merge

diff --cc fs/udf/super.c
Simple merge

diff --cc fs/xattr.c
Simple merge

diff --cc fs/xfs/xfs_super.c
Simple merge

diff --cc include/linux/net.h
index 99276c3,c8a9708..6ab31ca
--- 1/include/linux/net.h
--- 2/include/linux/net.h
+++ b/include/linux/net.h
@@@ -246,7 -247,7 +247,7 @@@ extern int              sock_sendmsg(struct 
                                  size_t len);
  extern int         sock_recvmsg(struct socket *sock, struct msghdr *msg,
                                  size_t size, int flags);
- extern int         sock_map_fd(struct socket *sock, int flags);
 -extern struct file  *sock_alloc_file(struct socket *sock, int flags);
++extern struct file  *sock_alloc_file(struct socket *sock, int flags, const char *dname);
  extern struct socket *sockfd_lookup(int fd, int *err);
  extern struct socket *sock_from_file(struct file *file, int *err);
  #define                    sockfd_put(sock) fput(sock->file)

diff --cc include/linux/sched.h
Simple merge

diff --cc kernel/events/core.c
Simple merge

diff --cc kernel/exit.c
Simple merge

diff --cc kernel/taskstats.c
Simple merge

diff --cc net/9p/trans_fd.c
index 505f0ce,8c4e0b5..15656b8
--- 1/net/9p/trans_fd.c
--- 2/net/9p/trans_fd.c
+++ b/net/9p/trans_fd.c
@@@ -800,8 -801,8 +801,8 @@@ static int p9_socket_open(struct p9_cli
                return -ENOMEM;
  
        csocket->sk->sk_allocation = GFP_NOIO;
-       fd = sock_map_fd(csocket, 0);
-       if (fd < 0) {
 -      file = sock_alloc_file(csocket, 0);
++      file = sock_alloc_file(csocket, 0, NULL);
+       if (IS_ERR(file)) {
                pr_err("%s (%d): failed to map fd\n",
                       __func__, task_pid_nr(current));
                sock_release(csocket);

diff --cc net/core/netprio_cgroup.c
Simple merge

diff --cc net/core/scm.c
Simple merge

diff --cc net/sctp/socket.c
index d37d24f,fb5931c..59d16ea
--- 1/net/sctp/socket.c
--- 2/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@@ -4311,6 -4297,13 +4313,13 @@@ static int sctp_getsockopt_peeloff(stru
                goto out;
        }
  
 -      newfile = sock_alloc_file(newsock, 0);
++      newfile = sock_alloc_file(newsock, 0, NULL);
+       if (unlikely(IS_ERR(newfile))) {
+               put_unused_fd(retval);
+               sock_release(newsock);
+               return PTR_ERR(newfile);
+       }
+ 
        SCTP_DEBUG_PRINTK("%s: sk: %p newsk: %p sd: %d\n",
                          __func__, sk, newsock->sk, retval);
  

diff --cc net/socket.c
index 80dc7e8,38a1431..d92c490
--- 1/net/socket.c
--- 2/net/socket.c
+++ b/net/socket.c
@@@ -347,30 -346,15 +347,22 @@@ static struct file_system_type sock_fs_
   *    but we take care of internal coherence yet.
   */
  
- static int sock_alloc_file(struct socket *sock, struct file **f, int flags,
-                          const char *dname)
 -struct file *sock_alloc_file(struct socket *sock, int flags)
++struct file *sock_alloc_file(struct socket *sock, int flags, const char *dname)
  {
        struct qstr name = { .name = "" };
        struct path path;
        struct file *file;
-       int fd;
- 
-       fd = get_unused_fd_flags(flags);
-       if (unlikely(fd < 0))
-               return fd;
  
 +      if (dname) {
 +              name.name = dname;
 +              name.len = strlen(name.name);
 +      } else if (sock->sk) {
 +              name.name = sock->sk->sk_prot_creator->name;
 +              name.len = strlen(name.name);
 +      }
        path.dentry = d_alloc_pseudo(sock_mnt->mnt_sb, &name);
-       if (unlikely(!path.dentry)) {
-               put_unused_fd(fd);
-               return -ENOMEM;
-       }
+       if (unlikely(!path.dentry))
+               return ERR_PTR(-ENOMEM);
        path.mnt = mntget(sock_mnt);
  
        d_instantiate(path.dentry, SOCK_INODE(sock));
@@@ -390,22 -373,26 +381,26 @@@
        file->f_flags = O_RDWR | (flags & O_NONBLOCK);
        file->f_pos = 0;
        file->private_data = sock;
- 
-       *f = file;
-       return fd;
+       return file;
  }
+ EXPORT_SYMBOL(sock_alloc_file);
  
- int sock_map_fd(struct socket *sock, int flags)
+ static int sock_map_fd(struct socket *sock, int flags)
  {
        struct file *newfile;
-       int fd = sock_alloc_file(sock, &newfile, flags, NULL);
+       int fd = get_unused_fd_flags(flags);
+       if (unlikely(fd < 0))
+               return fd;
  
-       if (likely(fd >= 0))
 -      newfile = sock_alloc_file(sock, flags);
++      newfile = sock_alloc_file(sock, flags, NULL);
+       if (likely(!IS_ERR(newfile))) {
                fd_install(fd, newfile);
+               return fd;
+       }
  
-       return fd;
+       put_unused_fd(fd);
+       return PTR_ERR(newfile);
  }
- EXPORT_SYMBOL(sock_map_fd);
  
  struct socket *sock_from_file(struct file *file, int *err)
  {
@@@ -1471,12 -1395,27 +1466,27 @@@ SYSCALL_DEFINE4(socketpair, int, family
                err = fd1;
                goto out_release_both;
        }
- 
-       fd2 = sock_alloc_file(sock2, &newfile2, flags, NULL);
+       fd2 = get_unused_fd_flags(flags);
        if (unlikely(fd2 < 0)) {
                err = fd2;
 -      newfile1 = sock_alloc_file(sock1, flags);
+               put_unused_fd(fd1);
+               goto out_release_both;
+       }
+ 
 -      newfile2 = sock_alloc_file(sock2, flags);
++      newfile1 = sock_alloc_file(sock1, flags, NULL);
+       if (unlikely(IS_ERR(newfile1))) {
+               err = PTR_ERR(newfile1);
+               put_unused_fd(fd1);
+               put_unused_fd(fd2);
+               goto out_release_both;
+       }
+ 
++      newfile2 = sock_alloc_file(sock2, flags, NULL);
+       if (IS_ERR(newfile2)) {
+               err = PTR_ERR(newfile2);
                fput(newfile1);
                put_unused_fd(fd1);
+               put_unused_fd(fd2);
                sock_release(sock2);
                goto out;
        }
@@@ -1615,6 -1553,13 +1624,13 @@@ SYSCALL_DEFINE4(accept4, int, fd, struc
                sock_release(newsock);
                goto out_put;
        }
 -      newfile = sock_alloc_file(newsock, flags);
++      newfile = sock_alloc_file(newsock, flags, sock->sk->sk_prot_creator->name);
+       if (unlikely(IS_ERR(newfile))) {
+               err = PTR_ERR(newfile);
+               put_unused_fd(newfd);
+               sock_release(newsock);
+               goto out_put;
+       }
  
        err = security_socket_accept(sock, newsock);
        if (err)