pass a struct path to vfs_statfs

[~andy/linux] / fs / statfs.c

diff --git a/fs/statfs.c b/fs/statfs.c
index 4ef021f3b6120c7534df864c120dcf9f8b9ba3a4..6a305709a4da9b17d13c536017c6cf68b8cc942c 100644 (file)
--- a/fs/statfs.c
+++ b/fs/statfs.c
@@ -7,33 +7,35 @@
 #include <linux/security.h>
 #include <linux/uaccess.h>
 
-int vfs_statfs(struct dentry *dentry, struct kstatfs *buf)
+int statfs_by_dentry(struct dentry *dentry, struct kstatfs *buf)
 {
-       int retval = -ENODEV;
-
-       if (dentry) {
-               retval = -ENOSYS;
-               if (dentry->d_sb->s_op->statfs) {
-                       memset(buf, 0, sizeof(*buf));
-                       retval = security_sb_statfs(dentry);
-                       if (retval)
-                               return retval;
-                       retval = dentry->d_sb->s_op->statfs(dentry, buf);
-                       if (retval == 0 && buf->f_frsize == 0)
-                               buf->f_frsize = buf->f_bsize;
-               }
-       }
+       int retval;
+
+       if (!dentry->d_sb->s_op->statfs)
+               return -ENOSYS;
+
+       memset(buf, 0, sizeof(*buf));
+       retval = security_sb_statfs(dentry);
+       if (retval)
+               return retval;
+       retval = dentry->d_sb->s_op->statfs(dentry, buf);
+       if (retval == 0 && buf->f_frsize == 0)
+               buf->f_frsize = buf->f_bsize;
        return retval;
 }
 
+int vfs_statfs(struct path *path, struct kstatfs *buf)
+{
+       return statfs_by_dentry(path->dentry, buf);
+}
 EXPORT_SYMBOL(vfs_statfs);
 
-static int vfs_statfs_native(struct dentry *dentry, struct statfs *buf)
+static int do_statfs_native(struct path *path, struct statfs *buf)
 {
        struct kstatfs st;
        int retval;
 
-       retval = vfs_statfs(dentry, &st);
+       retval = vfs_statfs(path, &st);
        if (retval)
                return retval;
 
@@ -72,12 +74,12 @@ static int vfs_statfs_native(struct dentry *dentry, struct statfs *buf)
        return 0;
 }
 
-static int vfs_statfs64(struct dentry *dentry, struct statfs64 *buf)
+static int do_statfs64(struct path *path, struct statfs64 *buf)
 {
        struct kstatfs st;
        int retval;
 
-       retval = vfs_statfs(dentry, &st);
+       retval = vfs_statfs(path, &st);
        if (retval)
                return retval;
 
@@ -107,7 +109,7 @@ SYSCALL_DEFINE2(statfs, const char __user *, pathname, struct statfs __user *, b
        error = user_path(pathname, &path);
        if (!error) {
                struct statfs tmp;
-               error = vfs_statfs_native(path.dentry, &tmp);
+               error = do_statfs_native(&path, &tmp);
                if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
                        error = -EFAULT;
                path_put(&path);
@@ -125,7 +127,7 @@ SYSCALL_DEFINE3(statfs64, const char __user *, pathname, size_t, sz, struct stat
        error = user_path(pathname, &path);
        if (!error) {
                struct statfs64 tmp;
-               error = vfs_statfs64(path.dentry, &tmp);
+               error = do_statfs64(&path, &tmp);
                if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
                        error = -EFAULT;
                path_put(&path);
@@ -143,7 +145,7 @@ SYSCALL_DEFINE2(fstatfs, unsigned int, fd, struct statfs __user *, buf)
        file = fget(fd);
        if (!file)
                goto out;
-       error = vfs_statfs_native(file->f_path.dentry, &tmp);
+       error = do_statfs_native(&file->f_path, &tmp);
        if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
                error = -EFAULT;
        fput(file);
@@ -164,7 +166,7 @@ SYSCALL_DEFINE3(fstatfs64, unsigned int, fd, size_t, sz, struct statfs64 __user
        file = fget(fd);
        if (!file)
                goto out;
-       error = vfs_statfs64(file->f_path.dentry, &tmp);
+       error = do_statfs64(&file->f_path, &tmp);
        if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
                error = -EFAULT;
        fput(file);
@@ -183,7 +185,7 @@ SYSCALL_DEFINE2(ustat, unsigned, dev, struct ustat __user *, ubuf)
        if (!s)
                return -EINVAL;
 
-       err = vfs_statfs(s->s_root, &sbuf);
+       err = statfs_by_dentry(s->s_root, &sbuf);
        drop_super(s);
        if (err)
                return err;