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

Pull vfs changes from Al Viro.
 "A lot of misc stuff.  The obvious groups:
   * Miklos' atomic_open series; kills the damn abuse of
     ->d_revalidate() by NFS, which was the major stumbling block for
     all work in that area.
   * ripping security_file_mmap() and dealing with deadlocks in the
     area; sanitizing the neighborhood of vm_mmap()/vm_munmap() in
     general.
   * ->encode_fh() switched to saner API; insane fake dentry in
     mm/cleancache.c gone.
   * assorted annotations in fs (endianness, __user)
   * parts of Artem's ->s_dirty work (jff2 and reiserfs parts)
   * ->update_time() work from Josef.
   * other bits and pieces all over the place.

  Normally it would've been in two or three pull requests, but
  signal.git stuff had eaten a lot of time during this cycle ;-/"

Fix up trivial conflicts in Documentation/filesystems/vfs.txt (the
'truncate_range' inode method was removed by the VM changes, the VFS
update adds an 'update_time()' method), and in fs/btrfs/ulist.[ch] (due
to sparse fix added twice, with other changes nearby).

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (95 commits)
  nfs: don't open in ->d_revalidate
  vfs: retry last component if opening stale dentry
  vfs: nameidata_to_filp(): don't throw away file on error
  vfs: nameidata_to_filp(): inline __dentry_open()
  vfs: do_dentry_open(): don't put filp
  vfs: split __dentry_open()
  vfs: do_last() common post lookup
  vfs: do_last(): add audit_inode before open
  vfs: do_last(): only return EISDIR for O_CREAT
  vfs: do_last(): check LOOKUP_DIRECTORY
  vfs: do_last(): make ENOENT exit RCU safe
  vfs: make follow_link check RCU safe
  vfs: do_last(): use inode variable
  vfs: do_last(): inline walk_component()
  vfs: do_last(): make exit RCU safe
  vfs: split do_lookup()
  Btrfs: move over to use ->update_time
  fs: introduce inode operation ->update_time
  reiserfs: get rid of resierfs_sync_super
  reiserfs: mark the superblock as dirty a bit later
  ...

2 files changed, 8 insertions, 13 deletions

diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 504e61b7fd75..9562109d3a87 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -962,7 +962,9 @@ static ssize_t fuse_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
         if (err)
                 goto out;
 
-        file_update_time(file);
+        err = file_update_time(file);
+        if (err)
+                goto out;
 
         if (file->f_flags & O_DIRECT) {
                 written = generic_file_direct_write(iocb, iov, &nr_segs,
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 56f6dcf30768..42678a33b7bb 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -627,12 +627,10 @@ static struct dentry *fuse_get_dentry(struct super_block *sb,
         return ERR_PTR(err);
 }
 
-static int fuse_encode_fh(struct dentry *dentry, u32 *fh, int *max_len,
-                           int connectable)
+static int fuse_encode_fh(struct inode *inode, u32 *fh, int *max_len,
+                           struct inode *parent)
 {
-        struct inode *inode = dentry->d_inode;
-        bool encode_parent = connectable && !S_ISDIR(inode->i_mode);
-        int len = encode_parent ? 6 : 3;
+        int len = parent ? 6 : 3;
         u64 nodeid;
         u32 generation;
 
@@ -648,14 +646,9 @@ static int fuse_encode_fh(struct dentry *dentry, u32 *fh, int *max_len,
         fh[1] = (u32)(nodeid & 0xffffffff);
         fh[2] = generation;
 
-        if (encode_parent) {
-                struct inode *parent;
-
-                spin_lock(&dentry->d_lock);
-                parent = dentry->d_parent->d_inode;
+        if (parent) {
                 nodeid = get_fuse_inode(parent)->nodeid;
                 generation = parent->i_generation;
-                spin_unlock(&dentry->d_lock);
 
                 fh[3] = (u32)(nodeid >> 32);
                 fh[4] = (u32)(nodeid & 0xffffffff);
@@ -663,7 +656,7 @@ static int fuse_encode_fh(struct dentry *dentry, u32 *fh, int *max_len,
         }
 
         *max_len = len;
-        return encode_parent ? 0x82 : 0x81;
+        return parent ? 0x82 : 0x81;
 }
 
 static struct dentry *fuse_fh_to_dentry(struct super_block *sb,