3.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Miklos Szeredi <mszeredi@xxxxxxx>
commit 44b1d53043c482225196e8a9cd9f35163a1b3336 upstream.
Add d_is_dir(dentry) helper which is analogous to S_ISDIR().
To avoid confusion, rename d_is_directory() to d_can_lookup().
Signed-off-by: Miklos Szeredi <mszeredi@xxxxxxx>
Reviewed-by: J. Bruce Fields <bfields@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/namei.c | 23 +++++++++++------------
include/linux/dcache.h | 7 ++++++-
2 files changed, 17 insertions(+), 13 deletions(-)
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1797,7 +1797,7 @@ static int link_path_walk(const char *na
if (err)
return err;
}
- if (!d_is_directory(nd->path.dentry)) {
+ if (!d_can_lookup(nd->path.dentry)) {
err = -ENOTDIR;
break;
}
@@ -1818,7 +1818,7 @@ static int path_init(int dfd, const char
struct dentry *root = nd->root.dentry;
struct inode *inode = root->d_inode;
if (*name) {
- if (!d_is_directory(root))
+ if (!d_can_lookup(root))
return -ENOTDIR;
retval = inode_permission(inode, MAY_EXEC);
if (retval)
@@ -1874,7 +1874,7 @@ static int path_init(int dfd, const char
dentry = f.file->f_path.dentry;
if (*name) {
- if (!d_is_directory(dentry)) {
+ if (!d_can_lookup(dentry)) {
fdput(f);
return -ENOTDIR;
}
@@ -1956,7 +1956,7 @@ static int path_lookupat(int dfd, const
err = complete_walk(nd);
if (!err && nd->flags & LOOKUP_DIRECTORY) {
- if (!d_is_directory(nd->path.dentry)) {
+ if (!d_can_lookup(nd->path.dentry)) {
path_put(&nd->path);
err = -ENOTDIR;
}
@@ -2416,11 +2416,11 @@ static int may_delete(struct inode *dir,
IS_IMMUTABLE(inode) || IS_SWAPFILE(inode))
return -EPERM;
if (isdir) {
- if (!d_is_directory(victim) && !d_is_autodir(victim))
+ if (!d_is_dir(victim))
return -ENOTDIR;
if (IS_ROOT(victim))
return -EBUSY;
- } else if (d_is_directory(victim) || d_is_autodir(victim))
+ } else if (d_is_dir(victim))
return -EISDIR;
if (IS_DEADDIR(dir))
return -ENOENT;
@@ -3018,11 +3018,10 @@ finish_open:
}
audit_inode(name, nd->path.dentry, 0);
error = -EISDIR;
- if ((open_flag & O_CREAT) &&
- (d_is_directory(nd->path.dentry) || d_is_autodir(nd->path.dentry)))
+ if ((open_flag & O_CREAT) && d_is_dir(nd->path.dentry))
goto out;
error = -ENOTDIR;
- if ((nd->flags & LOOKUP_DIRECTORY) && !d_is_directory(nd->path.dentry))
+ if ((nd->flags & LOOKUP_DIRECTORY) && !d_can_lookup(nd->path.dentry))
goto out;
if (!S_ISREG(nd->inode->i_mode))
will_truncate = false;
@@ -3746,7 +3745,7 @@ exit1:
slashes:
if (d_is_negative(dentry))
error = -ENOENT;
- else if (d_is_directory(dentry) || d_is_autodir(dentry))
+ else if (d_is_dir(dentry))
error = -EISDIR;
else
error = -ENOTDIR;
@@ -4125,7 +4124,7 @@ int vfs_rename(struct inode *old_dir, st
struct inode **delegated_inode)
{
int error;
- int is_dir = d_is_directory(old_dentry) || d_is_autodir(old_dentry);
+ int is_dir = d_is_dir(old_dentry);
const unsigned char *old_name;
if (old_dentry->d_inode == new_dentry->d_inode)
@@ -4218,7 +4217,7 @@ retry_deleg:
if (d_is_negative(old_dentry))
goto exit4;
/* unless the source is a directory trailing slashes give -ENOTDIR */
- if (!d_is_directory(old_dentry) && !d_is_autodir(old_dentry)) {
+ if (!d_is_dir(old_dentry)) {
error = -ENOTDIR;
if (oldnd.last.name[oldnd.last.len])
goto exit4;
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -429,7 +429,7 @@ static inline unsigned __d_entry_type(co
return dentry->d_flags & DCACHE_ENTRY_TYPE;
}
-static inline bool d_is_directory(const struct dentry *dentry)
+static inline bool d_can_lookup(const struct dentry *dentry)
{
return __d_entry_type(dentry) == DCACHE_DIRECTORY_TYPE;
}
@@ -439,6 +439,11 @@ static inline bool d_is_autodir(const st
return __d_entry_type(dentry) == DCACHE_AUTODIR_TYPE;
}
+static inline bool d_is_dir(const struct dentry *dentry)
+{
+ return d_can_lookup(dentry) || d_is_autodir(dentry);
+}
+
static inline bool d_is_symlink(const struct dentry *dentry)
{
return __d_entry_type(dentry) == DCACHE_SYMLINK_TYPE;
--
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