return retval;
return security_inode_permission(inode,
- mask & (MAY_READ|MAY_WRITE|MAY_EXEC));
+ mask & (MAY_READ|MAY_WRITE|MAY_EXEC|MAY_APPEND));
}
/**
nd, open_flags, create_mode);
}
-int __user_path_lookup_open(const char __user *name, unsigned int lookup_flags,
- struct nameidata *nd, int open_flags)
-{
- char *tmp = getname(name);
- int err = PTR_ERR(tmp);
-
- if (!IS_ERR(tmp)) {
- err = __path_lookup_intent_open(AT_FDCWD, tmp, lookup_flags, nd, open_flags, 0);
- putname(tmp);
- }
- return err;
-}
-
static struct dentry *__lookup_hash(struct qstr *name,
struct dentry *base, struct nameidata *nd)
{
return __lookup_hash(&this, base, NULL);
}
-int __user_walk_fd(int dfd, const char __user *name, unsigned flags,
- struct nameidata *nd)
+int user_path_at(int dfd, const char __user *name, unsigned flags,
+ struct path *path)
{
+ struct nameidata nd;
char *tmp = getname(name);
int err = PTR_ERR(tmp);
-
if (!IS_ERR(tmp)) {
- err = do_path_lookup(dfd, tmp, flags, nd);
+
+ BUG_ON(flags & LOOKUP_PARENT);
+
+ err = do_path_lookup(dfd, tmp, flags, &nd);
putname(tmp);
+ if (!err)
+ *path = nd.path;
}
return err;
}
-int __user_walk(const char __user *name, unsigned flags, struct nameidata *nd)
+static int user_path_parent(int dfd, const char __user *path,
+ struct nameidata *nd, char **name)
{
- return __user_walk_fd(AT_FDCWD, name, flags, nd);
+ char *s = getname(path);
+ int error;
+
+ if (IS_ERR(s))
+ return PTR_ERR(s);
+
+ error = do_path_lookup(dfd, s, LOOKUP_PARENT, nd);
+ if (error)
+ putname(s);
+ else
+ *name = s;
+
+ return error;
}
/*
asmlinkage long sys_mknodat(int dfd, const char __user *filename, int mode,
unsigned dev)
{
- int error = 0;
- char * tmp;
- struct dentry * dentry;
+ int error;
+ char *tmp;
+ struct dentry *dentry;
struct nameidata nd;
if (S_ISDIR(mode))
return -EPERM;
- tmp = getname(filename);
- if (IS_ERR(tmp))
- return PTR_ERR(tmp);
- error = do_path_lookup(dfd, tmp, LOOKUP_PARENT, &nd);
+ error = user_path_parent(dfd, filename, &nd, &tmp);
if (error)
- goto out;
+ return error;
+
dentry = lookup_create(&nd, 0);
if (IS_ERR(dentry)) {
error = PTR_ERR(dentry);
out_unlock:
mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
path_put(&nd.path);
-out:
putname(tmp);
return error;
struct dentry *dentry;
struct nameidata nd;
- tmp = getname(pathname);
- error = PTR_ERR(tmp);
- if (IS_ERR(tmp))
+ error = user_path_parent(dfd, pathname, &nd, &tmp);
+ if (error)
goto out_err;
- error = do_path_lookup(dfd, tmp, LOOKUP_PARENT, &nd);
- if (error)
- goto out;
dentry = lookup_create(&nd, 1);
error = PTR_ERR(dentry);
if (IS_ERR(dentry))
out_unlock:
mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
path_put(&nd.path);
-out:
putname(tmp);
out_err:
return error;
struct dentry *dentry;
struct nameidata nd;
- name = getname(pathname);
- if(IS_ERR(name))
- return PTR_ERR(name);
-
- error = do_path_lookup(dfd, name, LOOKUP_PARENT, &nd);
+ error = user_path_parent(dfd, pathname, &nd, &name);
if (error)
- goto exit;
+ return error;
switch(nd.last_type) {
case LAST_DOTDOT:
mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
exit1:
path_put(&nd.path);
-exit:
putname(name);
return error;
}
*/
static long do_unlinkat(int dfd, const char __user *pathname)
{
- int error = 0;
- char * name;
+ int error;
+ char *name;
struct dentry *dentry;
struct nameidata nd;
struct inode *inode = NULL;
- name = getname(pathname);
- if(IS_ERR(name))
- return PTR_ERR(name);
-
- error = do_path_lookup(dfd, name, LOOKUP_PARENT, &nd);
+ error = user_path_parent(dfd, pathname, &nd, &name);
if (error)
- goto exit;
+ return error;
+
error = -EISDIR;
if (nd.last_type != LAST_NORM)
goto exit1;
iput(inode); /* truncate the inode here */
exit1:
path_put(&nd.path);
-exit:
putname(name);
return error;
asmlinkage long sys_symlinkat(const char __user *oldname,
int newdfd, const char __user *newname)
{
- int error = 0;
- char * from;
- char * to;
+ int error;
+ char *from;
+ char *to;
struct dentry *dentry;
struct nameidata nd;
from = getname(oldname);
- if(IS_ERR(from))
+ if (IS_ERR(from))
return PTR_ERR(from);
- to = getname(newname);
- error = PTR_ERR(to);
- if (IS_ERR(to))
- goto out_putname;
- error = do_path_lookup(newdfd, to, LOOKUP_PARENT, &nd);
+ error = user_path_parent(newdfd, newname, &nd, &to);
if (error)
- goto out;
+ goto out_putname;
+
dentry = lookup_create(&nd, 0);
error = PTR_ERR(dentry);
if (IS_ERR(dentry))
out_unlock:
mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
path_put(&nd.path);
-out:
putname(to);
out_putname:
putname(from);
int flags)
{
struct dentry *new_dentry;
- struct nameidata nd, old_nd;
+ struct nameidata nd;
+ struct path old_path;
int error;
- char * to;
+ char *to;
if ((flags & ~AT_SYMLINK_FOLLOW) != 0)
return -EINVAL;
- to = getname(newname);
- if (IS_ERR(to))
- return PTR_ERR(to);
-
- error = __user_walk_fd(olddfd, oldname,
- flags & AT_SYMLINK_FOLLOW ? LOOKUP_FOLLOW : 0,
- &old_nd);
+ error = user_path_at(olddfd, oldname,
+ flags & AT_SYMLINK_FOLLOW ? LOOKUP_FOLLOW : 0,
+ &old_path);
if (error)
- goto exit;
- error = do_path_lookup(newdfd, to, LOOKUP_PARENT, &nd);
+ return error;
+
+ error = user_path_parent(newdfd, newname, &nd, &to);
if (error)
goto out;
error = -EXDEV;
- if (old_nd.path.mnt != nd.path.mnt)
+ if (old_path.mnt != nd.path.mnt)
goto out_release;
new_dentry = lookup_create(&nd, 0);
error = PTR_ERR(new_dentry);
error = mnt_want_write(nd.path.mnt);
if (error)
goto out_dput;
- error = vfs_link(old_nd.path.dentry, nd.path.dentry->d_inode, new_dentry);
+ error = vfs_link(old_path.dentry, nd.path.dentry->d_inode, new_dentry);
mnt_drop_write(nd.path.mnt);
out_dput:
dput(new_dentry);
mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
out_release:
path_put(&nd.path);
-out:
- path_put(&old_nd.path);
-exit:
putname(to);
+out:
+ path_put(&old_path);
return error;
}
return error;
}
-static int do_rename(int olddfd, const char *oldname,
- int newdfd, const char *newname)
+asmlinkage long sys_renameat(int olddfd, const char __user *oldname,
+ int newdfd, const char __user *newname)
{
- int error = 0;
- struct dentry * old_dir, * new_dir;
- struct dentry * old_dentry, *new_dentry;
- struct dentry * trap;
+ struct dentry *old_dir, *new_dir;
+ struct dentry *old_dentry, *new_dentry;
+ struct dentry *trap;
struct nameidata oldnd, newnd;
+ char *from;
+ char *to;
+ int error;
- error = do_path_lookup(olddfd, oldname, LOOKUP_PARENT, &oldnd);
+ error = user_path_parent(olddfd, oldname, &oldnd, &from);
if (error)
goto exit;
- error = do_path_lookup(newdfd, newname, LOOKUP_PARENT, &newnd);
+ error = user_path_parent(newdfd, newname, &newnd, &to);
if (error)
goto exit1;
unlock_rename(new_dir, old_dir);
exit2:
path_put(&newnd.path);
+ putname(to);
exit1:
path_put(&oldnd.path);
-exit:
- return error;
-}
-
-asmlinkage long sys_renameat(int olddfd, const char __user *oldname,
- int newdfd, const char __user *newname)
-{
- int error;
- char * from;
- char * to;
-
- from = getname(oldname);
- if(IS_ERR(from))
- return PTR_ERR(from);
- to = getname(newname);
- error = PTR_ERR(to);
- if (!IS_ERR(to)) {
- error = do_rename(olddfd, from, newdfd, to);
- putname(to);
- }
putname(from);
+exit:
return error;
}
.put_link = page_put_link,
};
-EXPORT_SYMBOL(__user_walk);
-EXPORT_SYMBOL(__user_walk_fd);
+EXPORT_SYMBOL(user_path_at);
EXPORT_SYMBOL(follow_down);
EXPORT_SYMBOL(follow_up);
EXPORT_SYMBOL(get_write_access); /* binfmt_aout */
projects / linux-2.6-omap-h63xx.git / blobdiff