Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull misc vfs updates from Al Viro:
 "Assorted misc bits and pieces.

  There are several single-topic branches left after this (rename2
  series from Miklos, current_time series from Deepa Dinamani, xattr
  series from Andreas, uaccess stuff from from me) and I'd prefer to
  send those separately"

* 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (39 commits)
  proc: switch auxv to use of __mem_open()
  hpfs: support FIEMAP
  cifs: get rid of unused arguments of CIFSSMBWrite()
  posix_acl: uapi header split
  posix_acl: xattr representation cleanups
  fs/aio.c: eliminate redundant loads in put_aio_ring_file
  fs/internal.h: add const to ns_dentry_operations declaration
  compat: remove compat_printk()
  fs/buffer.c: make __getblk_slow() static
  proc: unsigned file descriptors
  fs/file: more unsigned file descriptors
  fs: compat: remove redundant check of nr_segs
  cachefiles: Fix attempt to read i_blocks after deleting file [ver #2]
  cifs: don't use memcpy() to copy struct iov_iter
  get rid of separate multipage fault-in primitives
  fs: Avoid premature clearing of capabilities
  fs: Give dentry to inode_change_ok() instead of inode
  fuse: Propagate dentry down to inode_change_ok()
  ceph: Propagate dentry down to inode_change_ok()
  xfs: Propagate dentry down to inode_change_ok()
  ...

fs/xfs/xfs_acl.c

@@ -257,16 +257,11 @@ xfs_set_acl(struct inode *inode, struct posix_acl *acl, int type)
 		return error;
 
 	if (type == ACL_TYPE_ACCESS) {
-		umode_t mode = inode->i_mode;
-		error = posix_acl_equiv_mode(acl, &mode);
-
-		if (error <= 0) {
-			acl = NULL;
-
-			if (error < 0)
-				return error;
-		}
+		umode_t mode;
 
+		error = posix_acl_update_mode(inode, &mode, &acl);
+		if (error)
+			return error;
 		error = xfs_set_mode(inode, mode);
 		if (error)
 			return error;

fs/xfs/xfs_file.c

@@ -901,7 +901,7 @@ xfs_file_fallocate(
 
 		iattr.ia_valid = ATTR_SIZE;
 		iattr.ia_size = new_size;
-		error = xfs_setattr_size(ip, &iattr);
+		error = xfs_vn_setattr_size(file_dentry(file), &iattr);
 		if (error)
 			goto out_unlock;
 	}

fs/xfs/xfs_inode.c

@@ -1710,7 +1710,7 @@ xfs_inactive_truncate(
 	/*
 	 * Log the inode size first to prevent stale data exposure in the event
 	 * of a system crash before the truncate completes. See the related
-	 * comment in xfs_setattr_size() for details.
+	 * comment in xfs_vn_setattr_size() for details.
 	 */
 	ip->i_d.di_size = 0;
 	xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);

fs/xfs/xfs_ioctl.c

@@ -720,7 +720,7 @@ xfs_ioc_space(
 		iattr.ia_valid = ATTR_SIZE;
 		iattr.ia_size = bf->l_start;
 
-		error = xfs_setattr_size(ip, &iattr);
+		error = xfs_vn_setattr_size(file_dentry(filp), &iattr);
 		break;
 	default:
 		ASSERT(0);

fs/xfs/xfs_iops.c

@@ -542,6 +542,28 @@ xfs_setattr_time(
 		inode->i_mtime = iattr->ia_mtime;
 }
 
+static int
+xfs_vn_change_ok(
+	struct dentry	*dentry,
+	struct iattr	*iattr)
+{
+	struct xfs_mount	*mp = XFS_I(d_inode(dentry))->i_mount;
+
+	if (mp->m_flags & XFS_MOUNT_RDONLY)
+		return -EROFS;
+
+	if (XFS_FORCED_SHUTDOWN(mp))
+		return -EIO;
+
+	return setattr_prepare(dentry, iattr);
+}
+
+/*
+ * Set non-size attributes of an inode.
+ *
+ * Caution: The caller of this function is responsible for calling
+ * setattr_prepare() or otherwise verifying the change is fine.
+ */
 int
 xfs_setattr_nonsize(
 	struct xfs_inode	*ip,
@@ -558,21 +580,6 @@ xfs_setattr_nonsize(
 	struct xfs_dquot	*udqp = NULL, *gdqp = NULL;
 	struct xfs_dquot	*olddquot1 = NULL, *olddquot2 = NULL;
 
-	trace_xfs_setattr(ip);
-
-	/* If acls are being inherited, we already have this checked */
-	if (!(flags & XFS_ATTR_NOACL)) {
-		if (mp->m_flags & XFS_MOUNT_RDONLY)
-			return -EROFS;
-
-		if (XFS_FORCED_SHUTDOWN(mp))
-			return -EIO;
-
-		error = inode_change_ok(inode, iattr);
-		if (error)
-			return error;
-	}
-
 	ASSERT((mask & ATTR_SIZE) == 0);
 
 	/*
@@ -743,8 +750,27 @@ out_dqrele:
 	return error;
 }
 
+int
+xfs_vn_setattr_nonsize(
+	struct dentry		*dentry,
+	struct iattr		*iattr)
+{
+	struct xfs_inode	*ip = XFS_I(d_inode(dentry));
+	int error;
+
+	trace_xfs_setattr(ip);
+
+	error = xfs_vn_change_ok(dentry, iattr);
+	if (error)
+		return error;
+	return xfs_setattr_nonsize(ip, iattr, 0);
+}
+
 /*
  * Truncate file.  Must have write permission and not be a directory.
+ *
+ * Caution: The caller of this function is responsible for calling
+ * setattr_prepare() or otherwise verifying the change is fine.
  */
 int
 xfs_setattr_size(
@@ -759,18 +785,6 @@ xfs_setattr_size(
 	uint			lock_flags = 0;
 	bool			did_zeroing = false;
 
-	trace_xfs_setattr(ip);
-
-	if (mp->m_flags & XFS_MOUNT_RDONLY)
-		return -EROFS;
-
-	if (XFS_FORCED_SHUTDOWN(mp))
-		return -EIO;
-
-	error = inode_change_ok(inode, iattr);
-	if (error)
-		return error;
-
 	ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL));
 	ASSERT(xfs_isilocked(ip, XFS_MMAPLOCK_EXCL));
 	ASSERT(S_ISREG(inode->i_mode));
@@ -942,16 +956,32 @@ out_trans_cancel:
 	goto out_unlock;
 }
 
+int
+xfs_vn_setattr_size(
+	struct dentry		*dentry,
+	struct iattr		*iattr)
+{
+	struct xfs_inode	*ip = XFS_I(d_inode(dentry));
+	int error;
+
+	trace_xfs_setattr(ip);
+
+	error = xfs_vn_change_ok(dentry, iattr);
+	if (error)
+		return error;
+	return xfs_setattr_size(ip, iattr);
+}
+
 STATIC int
 xfs_vn_setattr(
 	struct dentry		*dentry,
 	struct iattr		*iattr)
 {
-	struct xfs_inode	*ip = XFS_I(d_inode(dentry));
 	int			error;
 
 	if (iattr->ia_valid & ATTR_SIZE) {
-		uint		iolock = XFS_IOLOCK_EXCL;
+		struct xfs_inode	*ip = XFS_I(d_inode(dentry));
+		uint			iolock = XFS_IOLOCK_EXCL;
 
 		xfs_ilock(ip, iolock);
 		error = xfs_break_layouts(d_inode(dentry), &iolock, true);
@@ -959,11 +989,11 @@ xfs_vn_setattr(
 			xfs_ilock(ip, XFS_MMAPLOCK_EXCL);
 			iolock |= XFS_MMAPLOCK_EXCL;
 
-			error = xfs_setattr_size(ip, iattr);
+			error = xfs_vn_setattr_size(dentry, iattr);
 		}
 		xfs_iunlock(ip, iolock);
 	} else {
-		error = xfs_setattr_nonsize(ip, iattr, 0);
+		error = xfs_vn_setattr_nonsize(dentry, iattr);
 	}
 
 	return error;

fs/xfs/xfs_iops.h

@@ -33,6 +33,7 @@ extern ssize_t xfs_vn_listxattr(struct dentry *, char *data, size_t size);
 extern void xfs_setattr_time(struct xfs_inode *ip, struct iattr *iattr);
 extern int xfs_setattr_nonsize(struct xfs_inode *ip, struct iattr *vap,
 			       int flags);
-extern int xfs_setattr_size(struct xfs_inode *ip, struct iattr *vap);
+extern int xfs_vn_setattr_nonsize(struct dentry *dentry, struct iattr *vap);
+extern int xfs_vn_setattr_size(struct dentry *dentry, struct iattr *vap);
 
 #endif /* __XFS_IOPS_H__ */