Jan 29 2015

VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry) 

Author: David Howells <dhowells@redhat.com>

Convert the following where appropriate:

 (1) S_ISLNK(dentry->d_inode) to d_is_symlink(dentry).

 (2) S_ISREG(dentry->d_inode) to d_is_reg(dentry).

 (3) S_ISDIR(dentry->d_inode) to d_is_dir(dentry).  This is actually more
     complicated than it appears as some calls should be converted to
     d_can_lookup() instead.  The difference is whether the directory in
     question is a real dir with a ->lookup op or whether it's a fake dir with
     a ->d_automount op.

In some circumstances, we can subsume checks for dentry->d_inode not being
NULL into this, provided we the code isn't in a filesystem that expects
d_inode to be NULL if the dirent really *is* negative (ie. if we're going to
use d_inode() rather than d_backing_inode() to get the inode pointer).

Note that the dentry type field may be set to something other than
DCACHE_MISS_TYPE when d_inode is NULL in the case of unionmount, where the VFS
manages the fall-through from a negative dentry to a lower layer.  In such a
case, the dentry type of the negative union dentry is set to the same as the
type of the lower dentry.

However, if you know d_inode is not NULL at the call site, then you can use
the d_is_xxx() functions even in a filesystem.

There is one further complication: a 0,0 chardev dentry may be labelled
DCACHE_WHITEOUT_TYPE rather than DCACHE_SPECIAL_TYPE.  Strictly, this was
intended for special directory entry types that don't have attached inodes.

The following perl+coccinelle script was used:

use strict;

my @callers;
open($fd, 'git grep -l \'S_IS[A-Z].*->d_inode\' |') ||
    die "Can't grep for S_ISDIR and co. callers";
@callers = <$fd>;
close($fd);
unless (@callers) {
    print "No matches\n";
    exit(0);
}

my @cocci = (
    '@@',
    'expression E;',
    '@@',
    '',
    '- S_ISLNK(E->d_inode->i_mode)',
    '+ d_is_symlink(E)',
    '',
    '@@',
    'expression E;',
    '@@',
    '',
    '- S_ISDIR(E->d_inode->i_mode)',
    '+ d_is_dir(E)',
    '',
    '@@',
    'expression E;',
    '@@',
    '',
    '- S_ISREG(E->d_inode->i_mode)',
    '+ d_is_reg(E)' );

my $coccifile = "tmp.sp.cocci";
open($fd, ">$coccifile") || die $coccifile;
print($fd "$_\n") || die $coccifile foreach (@cocci);
close($fd);

foreach my $file (@callers) {
    chomp $file;
    print "Processing ", $file, "\n";
    system("spatch", "--sp-file", $coccifile, $file, "--in-place", "--no-show-diff") == 0 ||
	die "spatch failed";
}

[AV: overlayfs parts skipped]

Signed-off-by: David Howells 
Signed-off-by: Al Viro 

---
 arch/s390/hypfs/inode.c       |  2 +-
 fs/9p/vfs_inode.c             |  2 +-
 fs/autofs4/expire.c           |  2 +-
 fs/autofs4/root.c             |  4 ++--
 fs/btrfs/ioctl.c              |  4 ++--
 fs/cachefiles/daemon.c        |  4 ++--
 fs/cachefiles/namei.c         | 16 ++++++++--------
 fs/ceph/dir.c                 |  2 +-
 fs/ceph/file.c                |  2 +-
 fs/coda/dir.c                 |  2 +-
 fs/debugfs/inode.c            |  2 +-
 fs/ecryptfs/file.c            |  2 +-
 fs/ecryptfs/inode.c           |  4 ++--
 fs/exportfs/expfs.c           |  2 +-
 fs/fuse/dir.c                 |  2 +-
 fs/gfs2/dir.c                 |  2 +-
 fs/hfsplus/dir.c              |  2 +-
 fs/hppfs/hppfs.c              |  4 ++--
 fs/jffs2/dir.c                | 14 +++++++-------
 fs/jffs2/super.c              |  2 +-
 fs/libfs.c                    |  2 +-
 fs/namei.c                    |  2 +-
 fs/namespace.c                | 10 +++++-----
 fs/nfsd/nfs4recover.c         |  4 ++--
 fs/nfsd/nfsfh.c               |  8 ++++----
 fs/nfsd/vfs.c                 |  8 ++++----
 fs/notify/fanotify/fanotify.c |  6 +++---
 fs/overlayfs/dir.c            |  6 +++---
 fs/posix_acl.c                |  4 ++--
 fs/reiserfs/xattr.c           |  4 ++--
 fs/xfs/xfs_ioctl.c            |  2 +-
 mm/shmem.c                    |  4 ++--
 security/inode.c              |  2 +-
 security/selinux/hooks.c      |  4 ++--
 34 files changed, 71 insertions(+), 71 deletions(-)
 
diff --git a/arch/s390/hypfs/inode.c b/arch/s390/hypfs/inode.c
index 67a0014..99824ff 100644
--- a/arch/s390/hypfs/inode.c
+++ b/arch/s390/hypfs/inode.c
@@ -74,7 +74,7 @@ static void hypfs_remove(struct dentry *dentry)
 	parent = dentry->d_parent;
 	mutex_lock(&parent->d_inode->i_mutex);
 	if (hypfs_positive(dentry)) {
-		if (S_ISDIR(dentry->d_inode->i_mode))
+		if (d_is_dir(dentry))
 			simple_rmdir(parent->d_inode, dentry);
 		else
 			simple_unlink(parent->d_inode, dentry);
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 9ee5343..3662f1d 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -1127,7 +1127,7 @@ static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
 	}
 
 	/* Write all dirty data */
-	if (S_ISREG(dentry->d_inode->i_mode))
+	if (d_is_reg(dentry))
 		filemap_write_and_wait(dentry->d_inode->i_mapping);
 
 	retval = p9_client_wstat(fid, &wstat);
diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c
index bfdbaba..11dd118 100644
--- a/fs/autofs4/expire.c
+++ b/fs/autofs4/expire.c
@@ -374,7 +374,7 @@ static struct dentry *should_expire(struct dentry *dentry,
 		return NULL;
 	}
 
-	if (dentry->d_inode && S_ISLNK(dentry->d_inode->i_mode)) {
+	if (dentry->d_inode && d_is_symlink(dentry)) {
 		DPRINTK("checking symlink %p %pd", dentry, dentry);
 		/*
 		 * A symlink can't be "busy" in the usual sense so
diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c
index 7ba355b..7e44fdd 100644
--- a/fs/autofs4/root.c
+++ b/fs/autofs4/root.c
@@ -371,7 +371,7 @@ static struct vfsmount *autofs4_d_automount(struct path *path)
 	 * having d_mountpoint() true, so there's no need to call back
 	 * to the daemon.
 	 */
-	if (dentry->d_inode && S_ISLNK(dentry->d_inode->i_mode)) {
+	if (dentry->d_inode && d_is_symlink(dentry)) {
 		spin_unlock(&sbi->fs_lock);
 		goto done;
 	}
@@ -485,7 +485,7 @@ static int autofs4_d_manage(struct dentry *dentry, bool rcu_walk)
 		 * an incorrect ELOOP error return.
 		 */
 		if ((!d_mountpoint(dentry) && !simple_empty(dentry)) ||
-		    (dentry->d_inode && S_ISLNK(dentry->d_inode->i_mode)))
+		    (dentry->d_inode && d_is_symlink(dentry)))
 			status = -EISDIR;
 	}
 	spin_unlock(&sbi->fs_lock);
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index d49fe8a..74609b9 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -776,11 +776,11 @@ static int btrfs_may_delete(struct inode *dir, struct dentry *victim, int isdir)
 	    IS_IMMUTABLE(victim->d_inode) || IS_SWAPFILE(victim->d_inode))
 		return -EPERM;
 	if (isdir) {
-		if (!S_ISDIR(victim->d_inode->i_mode))
+		if (!d_is_dir(victim))
 			return -ENOTDIR;
 		if (IS_ROOT(victim))
 			return -EBUSY;
-	} else if (S_ISDIR(victim->d_inode->i_mode))
+	} else if (d_is_dir(victim))
 		return -EISDIR;
 	if (IS_DEADDIR(dir))
 		return -ENOENT;
diff --git a/fs/cachefiles/daemon.c b/fs/cachefiles/daemon.c
index ce1b115..d928402 100644
--- a/fs/cachefiles/daemon.c
+++ b/fs/cachefiles/daemon.c
@@ -574,7 +574,7 @@ static int cachefiles_daemon_cull(struct cachefiles_cache *cache, char *args)
 	/* extract the directory dentry from the cwd */
 	get_fs_pwd(current->fs, &path);
 
-	if (!S_ISDIR(path.dentry->d_inode->i_mode))
+	if (!d_is_dir(path.dentry))
 		goto notdir;
 
 	cachefiles_begin_secure(cache, &saved_cred);
@@ -646,7 +646,7 @@ static int cachefiles_daemon_inuse(struct cachefiles_cache *cache, char *args)
 	/* extract the directory dentry from the cwd */
 	get_fs_pwd(current->fs, &path);
 
-	if (!S_ISDIR(path.dentry->d_inode->i_mode))
+	if (!d_is_dir(path.dentry))
 		goto notdir;
 
 	cachefiles_begin_secure(cache, &saved_cred);
diff --git a/fs/cachefiles/namei.c b/fs/cachefiles/namei.c
index 7f8e83f..d750e8c 100644
--- a/fs/cachefiles/namei.c
+++ b/fs/cachefiles/namei.c
@@ -277,7 +277,7 @@ static int cachefiles_bury_object(struct cachefiles_cache *cache,
 	_debug("remove %p from %p", rep, dir);
 
 	/* non-directories can just be unlinked */
-	if (!S_ISDIR(rep->d_inode->i_mode)) {
+	if (!d_is_dir(rep)) {
 		_debug("unlink stale object");
 
 		path.mnt = cache->mnt;
@@ -323,7 +323,7 @@ try_again:
 		return 0;
 	}
 
-	if (!S_ISDIR(cache->graveyard->d_inode->i_mode)) {
+	if (!d_is_dir(cache->graveyard)) {
 		unlock_rename(cache->graveyard, dir);
 		cachefiles_io_error(cache, "Graveyard no longer a directory");
 		return -EIO;
@@ -475,7 +475,7 @@ int cachefiles_walk_to_object(struct cachefiles_object *parent,
 	ASSERT(parent->dentry);
 	ASSERT(parent->dentry->d_inode);
 
-	if (!(S_ISDIR(parent->dentry->d_inode->i_mode))) {
+	if (!(d_is_dir(parent->dentry))) {
 		// TODO: convert file to dir
 		_leave("looking up in none directory");
 		return -ENOBUFS;
@@ -539,7 +539,7 @@ lookup_again:
 			_debug("mkdir -> %p{%p{ino=%lu}}",
 			       next, next->d_inode, next->d_inode->i_ino);
 
-		} else if (!S_ISDIR(next->d_inode->i_mode)) {
+		} else if (!d_is_dir(next)) {
 			pr_err("inode %lu is not a directory\n",
 			       next->d_inode->i_ino);
 			ret = -ENOBUFS;
@@ -568,8 +568,8 @@ lookup_again:
 			_debug("create -> %p{%p{ino=%lu}}",
 			       next, next->d_inode, next->d_inode->i_ino);
 
-		} else if (!S_ISDIR(next->d_inode->i_mode) &&
-			   !S_ISREG(next->d_inode->i_mode)
+		} else if (!d_is_dir(next) &&
+			   !d_is_reg(next)
 			   ) {
 			pr_err("inode %lu is not a file or directory\n",
 			       next->d_inode->i_ino);
@@ -642,7 +642,7 @@ lookup_again:
 
 	/* open a file interface onto a data file */
 	if (object->type != FSCACHE_COOKIE_TYPE_INDEX) {
-		if (S_ISREG(object->dentry->d_inode->i_mode)) {
+		if (d_is_reg(object->dentry)) {
 			const struct address_space_operations *aops;
 
 			ret = -EPERM;
@@ -763,7 +763,7 @@ struct dentry *cachefiles_get_directory(struct cachefiles_cache *cache,
 	/* we need to make sure the subdir is a directory */
 	ASSERT(subdir->d_inode);
 
-	if (!S_ISDIR(subdir->d_inode->i_mode)) {
+	if (!d_is_dir(subdir)) {
 		pr_err("%s is not a directory\n", dirname);
 		ret = -EIO;
 		goto check_error;
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index c241603..f099aef 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -902,7 +902,7 @@ static int ceph_unlink(struct inode *dir, struct dentry *dentry)
 	} else if (ceph_snap(dir) == CEPH_NOSNAP) {
 		dout("unlink/rmdir dir %p dn %p inode %p\n",
 		     dir, dentry, inode);
-		op = S_ISDIR(dentry->d_inode->i_mode) ?
+		op = d_is_dir(dentry) ?
 			CEPH_MDS_OP_RMDIR : CEPH_MDS_OP_UNLINK;
 	} else
 		goto out;
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 905986d..851939c 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -292,7 +292,7 @@ int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
 	}
 	if (err)
 		goto out_req;
-	if (dn || dentry->d_inode == NULL || S_ISLNK(dentry->d_inode->i_mode)) {
+	if (dn || dentry->d_inode == NULL || d_is_symlink(dentry)) {
 		/* make vfs retry on splice, ENOENT, or symlink */
 		dout("atomic_open finish_no_open on dn %p\n", dn);
 		err = finish_no_open(file, dn);
diff --git a/fs/coda/dir.c b/fs/coda/dir.c
index 281ee01..60cb88c 100644
--- a/fs/coda/dir.c
+++ b/fs/coda/dir.c
@@ -304,7 +304,7 @@ static int coda_rename(struct inode *old_dir, struct dentry *old_dentry,
 			     (const char *) old_name, (const char *)new_name);
 	if (!error) {
 		if (new_dentry->d_inode) {
-			if (S_ISDIR(new_dentry->d_inode->i_mode)) {
+			if (d_is_dir(new_dentry)) {
 				coda_dir_drop_nlink(old_dir);
 				coda_dir_inc_nlink(new_dir);
 			}
diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
index 45b18a5..9093364 100644
--- a/fs/debugfs/inode.c
+++ b/fs/debugfs/inode.c
@@ -690,7 +690,7 @@ struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
 	}
 	d_move(old_dentry, dentry);
 	fsnotify_move(old_dir->d_inode, new_dir->d_inode, old_name,
-		S_ISDIR(old_dentry->d_inode->i_mode),
+		d_is_dir(old_dentry),
 		NULL, old_dentry);
 	fsnotify_oldname_free(old_name);
 	unlock_rename(new_dir, old_dir);
diff --git a/fs/ecryptfs/file.c b/fs/ecryptfs/file.c
index 6f4e659..b07731e 100644
--- a/fs/ecryptfs/file.c
+++ b/fs/ecryptfs/file.c
@@ -230,7 +230,7 @@ static int ecryptfs_open(struct inode *inode, struct file *file)
 	}
 	ecryptfs_set_file_lower(
 		file, ecryptfs_inode_to_private(inode)->lower_file);
-	if (S_ISDIR(ecryptfs_dentry->d_inode->i_mode)) {
+	if (d_is_dir(ecryptfs_dentry)) {
 		ecryptfs_printk(KERN_DEBUG, "This is a directory\n");
 		mutex_lock(&crypt_stat->cs_mutex);
 		crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED);
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index 34b36a5..b08b518 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -907,9 +907,9 @@ static int ecryptfs_setattr(struct dentry *dentry, struct iattr *ia)
 	lower_inode = ecryptfs_inode_to_lower(inode);
 	lower_dentry = ecryptfs_dentry_to_lower(dentry);
 	mutex_lock(&crypt_stat->cs_mutex);
-	if (S_ISDIR(dentry->d_inode->i_mode))
+	if (d_is_dir(dentry))
 		crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED);
-	else if (S_ISREG(dentry->d_inode->i_mode)
+	else if (d_is_reg(dentry)
 		 && (!(crypt_stat->flags & ECRYPTFS_POLICY_APPLIED)
 		     || !(crypt_stat->flags & ECRYPTFS_KEY_VALID))) {
 		struct ecryptfs_mount_crypt_stat *mount_crypt_stat;
diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c
index fdfd206..714cd37 100644
--- a/fs/exportfs/expfs.c
+++ b/fs/exportfs/expfs.c
@@ -429,7 +429,7 @@ struct dentry *exportfs_decode_fh(struct vfsmount *mnt, struct fid *fid,
 	if (IS_ERR(result))
 		return result;
 
-	if (S_ISDIR(result->d_inode->i_mode)) {
+	if (d_is_dir(result)) {
 		/*
 		 * This request is for a directory.
 		 *
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 08e7b1a..1545b71 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -971,7 +971,7 @@ int fuse_reverse_inval_entry(struct super_block *sb, u64 parent_nodeid,
 			err = -EBUSY;
 			goto badentry;
 		}
-		if (S_ISDIR(entry->d_inode->i_mode)) {
+		if (d_is_dir(entry)) {
 			shrink_dcache_parent(entry);
 			if (!simple_empty(entry)) {
 				err = -ENOTEMPTY;
diff --git a/fs/gfs2/dir.c b/fs/gfs2/dir.c
index 6371192..487527b 100644
--- a/fs/gfs2/dir.c
+++ b/fs/gfs2/dir.c
@@ -1809,7 +1809,7 @@ int gfs2_dir_del(struct gfs2_inode *dip, const struct dentry *dentry)
 		gfs2_consist_inode(dip);
 	dip->i_entries--;
 	dip->i_inode.i_mtime = dip->i_inode.i_ctime = tv;
-	if (S_ISDIR(dentry->d_inode->i_mode))
+	if (d_is_dir(dentry))
 		drop_nlink(&dip->i_inode);
 	mark_inode_dirty(&dip->i_inode);
 
diff --git a/fs/hfsplus/dir.c b/fs/hfsplus/dir.c
index 435bea2..f0235c1 100644
--- a/fs/hfsplus/dir.c
+++ b/fs/hfsplus/dir.c
@@ -530,7 +530,7 @@ static int hfsplus_rename(struct inode *old_dir, struct dentry *old_dentry,
 
 	/* Unlink destination if it already exists */
 	if (new_dentry->d_inode) {
-		if (S_ISDIR(new_dentry->d_inode->i_mode))
+		if (d_is_dir(new_dentry))
 			res = hfsplus_rmdir(new_dir, new_dentry);
 		else
 			res = hfsplus_unlink(new_dir, new_dentry);
diff --git a/fs/hppfs/hppfs.c b/fs/hppfs/hppfs.c
index 5f27551..043ac9d 100644
--- a/fs/hppfs/hppfs.c
+++ b/fs/hppfs/hppfs.c
@@ -678,10 +678,10 @@ static struct inode *get_inode(struct super_block *sb, struct dentry *dentry)
 		return NULL;
 	}
 
-	if (S_ISDIR(dentry->d_inode->i_mode)) {
+	if (d_is_dir(dentry)) {
 		inode->i_op = &hppfs_dir_iops;
 		inode->i_fop = &hppfs_dir_fops;
-	} else if (S_ISLNK(dentry->d_inode->i_mode)) {
+	} else if (d_is_symlink(dentry)) {
 		inode->i_op = &hppfs_link_iops;
 		inode->i_fop = &hppfs_file_fops;
 	} else {
diff --git a/fs/jffs2/dir.c b/fs/jffs2/dir.c
index 9385560..f21b6fb 100644
--- a/fs/jffs2/dir.c
+++ b/fs/jffs2/dir.c
@@ -252,7 +252,7 @@ static int jffs2_link (struct dentry *old_dentry, struct inode *dir_i, struct de
 	if (!f->inocache)
 		return -EIO;
 
-	if (S_ISDIR(old_dentry->d_inode->i_mode))
+	if (d_is_dir(old_dentry))
 		return -EPERM;
 
 	/* XXX: This is ugly */
@@ -772,7 +772,7 @@ static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry,
 	 */
 	if (new_dentry->d_inode) {
 		victim_f = JFFS2_INODE_INFO(new_dentry->d_inode);
-		if (S_ISDIR(new_dentry->d_inode->i_mode)) {
+		if (d_is_dir(new_dentry)) {
 			struct jffs2_full_dirent *fd;
 
 			mutex_lock(&victim_f->sem);
@@ -807,7 +807,7 @@ static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry,
 
 	if (victim_f) {
 		/* There was a victim. Kill it off nicely */
-		if (S_ISDIR(new_dentry->d_inode->i_mode))
+		if (d_is_dir(new_dentry))
 			clear_nlink(new_dentry->d_inode);
 		else
 			drop_nlink(new_dentry->d_inode);
@@ -815,7 +815,7 @@ static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry,
 		   inode which didn't exist. */
 		if (victim_f->inocache) {
 			mutex_lock(&victim_f->sem);
-			if (S_ISDIR(new_dentry->d_inode->i_mode))
+			if (d_is_dir(new_dentry))
 				victim_f->inocache->pino_nlink = 0;
 			else
 				victim_f->inocache->pino_nlink--;
@@ -825,7 +825,7 @@ static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry,
 
 	/* If it was a directory we moved, and there was no victim,
 	   increase i_nlink on its new parent */
-	if (S_ISDIR(old_dentry->d_inode->i_mode) && !victim_f)
+	if (d_is_dir(old_dentry) && !victim_f)
 		inc_nlink(new_dir_i);
 
 	/* Unlink the original */
@@ -839,7 +839,7 @@ static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry,
 		struct jffs2_inode_info *f = JFFS2_INODE_INFO(old_dentry->d_inode);
 		mutex_lock(&f->sem);
 		inc_nlink(old_dentry->d_inode);
-		if (f->inocache && !S_ISDIR(old_dentry->d_inode->i_mode))
+		if (f->inocache && !d_is_dir(old_dentry))
 			f->inocache->pino_nlink++;
 		mutex_unlock(&f->sem);
 
@@ -852,7 +852,7 @@ static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry,
 		return ret;
 	}
 
-	if (S_ISDIR(old_dentry->d_inode->i_mode))
+	if (d_is_dir(old_dentry))
 		drop_nlink(old_dir_i);
 
 	new_dir_i->i_mtime = new_dir_i->i_ctime = old_dir_i->i_mtime = old_dir_i->i_ctime = ITIME(now);
diff --git a/fs/jffs2/super.c b/fs/jffs2/super.c
index 0918f0e..3d76f28 100644
--- a/fs/jffs2/super.c
+++ b/fs/jffs2/super.c
@@ -138,7 +138,7 @@ static struct dentry *jffs2_get_parent(struct dentry *child)
 	struct jffs2_inode_info *f;
 	uint32_t pino;
 
-	BUG_ON(!S_ISDIR(child->d_inode->i_mode));
+	BUG_ON(!d_is_dir(child));
 
 	f = JFFS2_INODE_INFO(child->d_inode);
 
diff --git a/fs/libfs.c b/fs/libfs.c
index b2ffdb0..0ab6512 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -329,7 +329,7 @@ int simple_rename(struct inode *old_dir, struct dentry *old_dentry,
 		struct inode *new_dir, struct dentry *new_dentry)
 {
 	struct inode *inode = old_dentry->d_inode;
-	int they_are_dirs = S_ISDIR(old_dentry->d_inode->i_mode);
+	int they_are_dirs = d_is_dir(old_dentry);
 
 	if (!simple_empty(new_dentry))
 		return -ENOTEMPTY;
diff --git a/fs/namei.c b/fs/namei.c
index 96ca11d..c83145a 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2814,7 +2814,7 @@ no_open:
 			} else if (!dentry->d_inode) {
 				goto out;
 			} else if ((open_flag & O_TRUNC) &&
-				   S_ISREG(dentry->d_inode->i_mode)) {
+				   d_is_reg(dentry)) {
 				goto out;
 			}
 			/* will fail later, go on to get the right error */
diff --git a/fs/namespace.c b/fs/namespace.c
index 72a286e..82ef140 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1907,8 +1907,8 @@ static int graft_tree(struct mount *mnt, struct mount *p, struct mountpoint *mp)
 	if (mnt->mnt.mnt_sb->s_flags & MS_NOUSER)
 		return -EINVAL;
 
-	if (S_ISDIR(mp->m_dentry->d_inode->i_mode) !=
-	      S_ISDIR(mnt->mnt.mnt_root->d_inode->i_mode))
+	if (d_is_dir(mp->m_dentry) !=
+	      d_is_dir(mnt->mnt.mnt_root))
 		return -ENOTDIR;
 
 	return attach_recursive_mnt(mnt, p, mp, NULL);
@@ -2180,8 +2180,8 @@ static int do_move_mount(struct path *path, const char *old_name)
 	if (!mnt_has_parent(old))
 		goto out1;
 
-	if (S_ISDIR(path->dentry->d_inode->i_mode) !=
-	      S_ISDIR(old_path.dentry->d_inode->i_mode))
+	if (d_is_dir(path->dentry) !=
+	      d_is_dir(old_path.dentry))
 		goto out1;
 	/*
 	 * Don't move a mount residing in a shared parent.
@@ -2271,7 +2271,7 @@ static int do_add_mount(struct mount *newmnt, struct path *path, int mnt_flags)
 		goto unlock;
 
 	err = -EINVAL;
-	if (S_ISLNK(newmnt->mnt.mnt_root->d_inode->i_mode))
+	if (d_is_symlink(newmnt->mnt.mnt_root))
 		goto unlock;
 
 	newmnt->mnt.mnt_flags = mnt_flags;
diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c
index cc6a760..1c307f0 100644
--- a/fs/nfsd/nfs4recover.c
+++ b/fs/nfsd/nfs4recover.c
@@ -583,7 +583,7 @@ nfs4_reset_recoverydir(char *recdir)
 	if (status)
 		return status;
 	status = -ENOTDIR;
-	if (S_ISDIR(path.dentry->d_inode->i_mode)) {
+	if (d_is_dir(path.dentry)) {
 		strcpy(user_recovery_dirname, recdir);
 		status = 0;
 	}
@@ -1426,7 +1426,7 @@ nfsd4_client_tracking_init(struct net *net)
 	nn->client_tracking_ops = &nfsd4_legacy_tracking_ops;
 	status = kern_path(nfs4_recoverydir(), LOOKUP_FOLLOW, &path);
 	if (!status) {
-		status = S_ISDIR(path.dentry->d_inode->i_mode);
+		status = d_is_dir(path.dentry);
 		path_put(&path);
 		if (status)
 			goto do_init;
diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c
index 965b478..e9fa966 100644
--- a/fs/nfsd/nfsfh.c
+++ b/fs/nfsd/nfsfh.c
@@ -114,8 +114,8 @@ static inline __be32 check_pseudo_root(struct svc_rqst *rqstp,
 	 * We're exposing only the directories and symlinks that have to be
 	 * traversed on the way to real exports:
 	 */
-	if (unlikely(!S_ISDIR(dentry->d_inode->i_mode) &&
-		     !S_ISLNK(dentry->d_inode->i_mode)))
+	if (unlikely(!d_is_dir(dentry) &&
+		     !d_is_symlink(dentry)))
 		return nfserr_stale;
 	/*
 	 * A pseudoroot export gives permission to access only one
@@ -259,7 +259,7 @@ static __be32 nfsd_set_fh_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp)
 		goto out;
 	}
 
-	if (S_ISDIR(dentry->d_inode->i_mode) &&
+	if (d_is_dir(dentry) &&
 			(dentry->d_flags & DCACHE_DISCONNECTED)) {
 		printk("nfsd: find_fh_dentry returned a DISCONNECTED directory: %pd2\n",
 				dentry);
@@ -414,7 +414,7 @@ static inline void _fh_update_old(struct dentry *dentry,
 {
 	fh->ofh_ino = ino_t_to_u32(dentry->d_inode->i_ino);
 	fh->ofh_generation = dentry->d_inode->i_generation;
-	if (S_ISDIR(dentry->d_inode->i_mode) ||
+	if (d_is_dir(dentry) ||
 	    (exp->ex_flags & NFSEXP_NOSUBTREECHECK))
 		fh->ofh_dirino = 0;
 }
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 5685c67..3685265 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -615,9 +615,9 @@ nfsd_access(struct svc_rqst *rqstp, struct svc_fh *fhp, u32 *access, u32 *suppor
 	export = fhp->fh_export;
 	dentry = fhp->fh_dentry;
 
-	if (S_ISREG(dentry->d_inode->i_mode))
+	if (d_is_reg(dentry))
 		map = nfs3_regaccess;
-	else if (S_ISDIR(dentry->d_inode->i_mode))
+	else if (d_is_dir(dentry))
 		map = nfs3_diraccess;
 	else
 		map = nfs3_anyaccess;
@@ -1402,7 +1402,7 @@ do_nfsd_create(struct svc_rqst *rqstp, struct svc_fh *fhp,
 
 		switch (createmode) {
 		case NFS3_CREATE_UNCHECKED:
-			if (! S_ISREG(dchild->d_inode->i_mode))
+			if (! d_is_reg(dchild))
 				goto out;
 			else if (truncp) {
 				/* in nfsv4, we need to treat this case a little
@@ -1615,7 +1615,7 @@ nfsd_link(struct svc_rqst *rqstp, struct svc_fh *ffhp,
 	if (err)
 		goto out;
 	err = nfserr_isdir;
-	if (S_ISDIR(tfhp->fh_dentry->d_inode->i_mode))
+	if (d_is_dir(tfhp->fh_dentry))
 		goto out;
 	err = nfserr_perm;
 	if (!len)
diff --git a/fs/notify/fanotify/fanotify.c b/fs/notify/fanotify/fanotify.c
index 51ceb81..61fdbb8 100644
--- a/fs/notify/fanotify/fanotify.c
+++ b/fs/notify/fanotify/fanotify.c
@@ -115,8 +115,8 @@ static bool fanotify_should_send_event(struct fsnotify_mark *inode_mark,
 		return false;
 
 	/* sorry, fanotify only gives a damn about files and dirs */
-	if (!S_ISREG(path->dentry->d_inode->i_mode) &&
-	    !S_ISDIR(path->dentry->d_inode->i_mode))
+	if (!d_is_reg(path->dentry) &&
+	    !d_is_dir(path->dentry))
 		return false;
 
 	if (inode_mark && vfsmnt_mark) {
@@ -139,7 +139,7 @@ static bool fanotify_should_send_event(struct fsnotify_mark *inode_mark,
 		BUG();
 	}
 
-	if (S_ISDIR(path->dentry->d_inode->i_mode) &&
+	if (d_is_dir(path->dentry) &&
 	    !(marks_mask & FS_ISDIR & ~marks_ignored_mask))
 		return false;
 
diff --git a/fs/overlayfs/dir.c b/fs/overlayfs/dir.c
index 0dc4c33..d139405 100644
--- a/fs/overlayfs/dir.c
+++ b/fs/overlayfs/dir.c
@@ -19,7 +19,7 @@ void ovl_cleanup(struct inode *wdir, struct dentry *wdentry)
 	int err;
 
 	dget(wdentry);
-	if (S_ISDIR(wdentry->d_inode->i_mode))
+	if (d_is_dir(wdentry))
 		err = ovl_do_rmdir(wdir, wdentry);
 	else
 		err = ovl_do_unlink(wdir, wdentry);
@@ -693,7 +693,7 @@ static int ovl_rename2(struct inode *olddir, struct dentry *old,
 	bool new_create = false;
 	bool cleanup_whiteout = false;
 	bool overwrite = !(flags & RENAME_EXCHANGE);
-	bool is_dir = S_ISDIR(old->d_inode->i_mode);
+	bool is_dir = d_is_dir(old);
 	bool new_is_dir = false;
 	struct dentry *opaquedir = NULL;
 	const struct cred *old_cred = NULL;
@@ -720,7 +720,7 @@ static int ovl_rename2(struct inode *olddir, struct dentry *old,
 		if (err)
 			goto out;
 
-		if (S_ISDIR(new->d_inode->i_mode))
+		if (d_is_dir(new))
 			new_is_dir = true;
 
 		new_type = ovl_path_type(new);
diff --git a/fs/posix_acl.c b/fs/posix_acl.c
index 515d315..3a48bb7 100644
--- a/fs/posix_acl.c
+++ b/fs/posix_acl.c
@@ -776,7 +776,7 @@ posix_acl_xattr_get(struct dentry *dentry, const char *name,
 
 	if (!IS_POSIXACL(dentry->d_inode))
 		return -EOPNOTSUPP;
-	if (S_ISLNK(dentry->d_inode->i_mode))
+	if (d_is_symlink(dentry))
 		return -EOPNOTSUPP;
 
 	acl = get_acl(dentry->d_inode, type);
@@ -836,7 +836,7 @@ posix_acl_xattr_list(struct dentry *dentry, char *list, size_t list_size,
 
 	if (!IS_POSIXACL(dentry->d_inode))
 		return -EOPNOTSUPP;
-	if (S_ISLNK(dentry->d_inode->i_mode))
+	if (d_is_symlink(dentry))
 		return -EOPNOTSUPP;
 
 	if (type == ACL_TYPE_ACCESS)
diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c
index 04b0614..4e781e6 100644
--- a/fs/reiserfs/xattr.c
+++ b/fs/reiserfs/xattr.c
@@ -266,7 +266,7 @@ static int reiserfs_for_each_xattr(struct inode *inode,
 		for (i = 0; !err && i < buf.count && buf.dentries[i]; i++) {
 			struct dentry *dentry = buf.dentries[i];
 
-			if (!S_ISDIR(dentry->d_inode->i_mode))
+			if (!d_is_dir(dentry))
 				err = action(dentry, data);
 
 			dput(dentry);
@@ -322,7 +322,7 @@ static int delete_one_xattr(struct dentry *dentry, void *data)
 	struct inode *dir = dentry->d_parent->d_inode;
 
 	/* This is the xattr dir, handle specially. */
-	if (S_ISDIR(dentry->d_inode->i_mode))
+	if (d_is_dir(dentry))
 		return xattr_rmdir(dir, dentry);
 
 	return xattr_unlink(dir, dentry);
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index f7afb86..fe3c0fe 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -286,7 +286,7 @@ xfs_readlink_by_handle(
 		return PTR_ERR(dentry);
 
 	/* Restrict this handle operation to symlinks only. */
-	if (!S_ISLNK(dentry->d_inode->i_mode)) {
+	if (!d_is_symlink(dentry)) {
 		error = -EINVAL;
 		goto out_dput;
 	}
diff --git a/mm/shmem.c b/mm/shmem.c
index a63031f..2f17cb5 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -2319,8 +2319,8 @@ static int shmem_rmdir(struct inode *dir, struct dentry *dentry)
 
 static int shmem_exchange(struct inode *old_dir, struct dentry *old_dentry, struct inode *new_dir, struct dentry *new_dentry)
 {
-	bool old_is_dir = S_ISDIR(old_dentry->d_inode->i_mode);
-	bool new_is_dir = S_ISDIR(new_dentry->d_inode->i_mode);
+	bool old_is_dir = d_is_dir(old_dentry);
+	bool new_is_dir = d_is_dir(new_dentry);
 
 	if (old_dir != new_dir && old_is_dir != new_is_dir) {
 		if (old_is_dir) {
diff --git a/security/inode.c b/security/inode.c
index 8e7ca62..131a3c4 100644
--- a/security/inode.c
+++ b/security/inode.c
@@ -203,7 +203,7 @@ void securityfs_remove(struct dentry *dentry)
 	mutex_lock(&parent->d_inode->i_mutex);
 	if (positive(dentry)) {
 		if (dentry->d_inode) {
-			if (S_ISDIR(dentry->d_inode->i_mode))
+			if (d_is_dir(dentry))
 				simple_rmdir(parent->d_inode, dentry);
 			else
 				simple_unlink(parent->d_inode, dentry);
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 79f2c2c..4d1a541 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -1799,7 +1799,7 @@ static inline int may_rename(struct inode *old_dir,
 
 	old_dsec = old_dir->i_security;
 	old_isec = old_dentry->d_inode->i_security;
-	old_is_dir = S_ISDIR(old_dentry->d_inode->i_mode);
+	old_is_dir = d_is_dir(old_dentry);
 	new_dsec = new_dir->i_security;
 
 	ad.type = LSM_AUDIT_DATA_DENTRY;
@@ -1829,7 +1829,7 @@ static inline int may_rename(struct inode *old_dir,
 		return rc;
 	if (d_is_positive(new_dentry)) {
 		new_isec = new_dentry->d_inode->i_security;
-		new_is_dir = S_ISDIR(new_dentry->d_inode->i_mode);
+		new_is_dir = d_is_dir(new_dentry);
 		rc = avc_has_perm(sid, new_isec->sid,
 				  new_isec->sclass,
 				  (new_is_dir ? DIR__RMDIR : FILE__UNLINK), &ad);

qlambert