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[PATCH] assorted path_lookup() -> kern_path() conversions

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more nameidata eviction

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2008-08-02 01:04:36 -04:00
parent a63bb99660
commit 421748ecde
4 changed files with 34 additions and 37 deletions
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14
fs/block_dev.c
View File

@ -1268,33 +1268,33 @@ EXPORT_SYMBOL(ioctl_by_bdev);
* namespace if possible and return it. Return ERR_PTR(error)
* otherwise.
*/
struct block_device *lookup_bdev(const char *path)
struct block_device *lookup_bdev(const char *pathname)
{
struct block_device *bdev;
struct inode *inode;
struct nameidata nd;
struct path path;
int error;
if (!path || !*path)
if (!pathname || !*pathname)
return ERR_PTR(-EINVAL);
error = path_lookup(path, LOOKUP_FOLLOW, &nd);
error = kern_path(pathname, LOOKUP_FOLLOW, &path);
if (error)
return ERR_PTR(error);
inode = nd.path.dentry->d_inode;
inode = path.dentry->d_inode;
error = -ENOTBLK;
if (!S_ISBLK(inode->i_mode))
goto fail;
error = -EACCES;
if (nd.path.mnt->mnt_flags & MNT_NODEV)
if (path.mnt->mnt_flags & MNT_NODEV)
goto fail;
error = -ENOMEM;
bdev = bd_acquire(inode);
if (!bdev)
goto fail;
out:
path_put(&nd.path);
path_put(&path);
return bdev;
fail:
bdev = ERR_PTR(error);

16
fs/configfs/symlink.c
View File

@ -108,18 +108,18 @@ out:
}
static int get_target(const char *symname, struct nameidata *nd,
static int get_target(const char *symname, struct path *path,
struct config_item **target)
{
int ret;
ret = path_lookup(symname, LOOKUP_FOLLOW|LOOKUP_DIRECTORY, nd);
ret = kern_path(symname, LOOKUP_FOLLOW|LOOKUP_DIRECTORY, path);
if (!ret) {
if (nd->path.dentry->d_sb == configfs_sb) {
*target = configfs_get_config_item(nd->path.dentry);
if (path->dentry->d_sb == configfs_sb) {
*target = configfs_get_config_item(path->dentry);
if (!*target) {
ret = -ENOENT;
path_put(&nd->path);
path_put(path);
}
} else
ret = -EPERM;
@ -132,7 +132,7 @@ static int get_target(const char *symname, struct nameidata *nd,
int configfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
{
int ret;
struct nameidata nd;
struct path path;
struct configfs_dirent *sd;
struct config_item *parent_item;
struct config_item *target_item;
@ -159,7 +159,7 @@ int configfs_symlink(struct inode *dir, struct dentry *dentry, const char *symna
!type->ct_item_ops->allow_link)
goto out_put;
ret = get_target(symname, &nd, &target_item);
ret = get_target(symname, &path, &target_item);
if (ret)
goto out_put;
@ -174,7 +174,7 @@ int configfs_symlink(struct inode *dir, struct dentry *dentry, const char *symna
}
config_item_put(target_item);
path_put(&nd.path);
path_put(&path);
out_put:
config_item_put(parent_item);

23
fs/ecryptfs/main.c
View File

@ -471,31 +471,26 @@ out:
*/
static int ecryptfs_read_super(struct super_block *sb, const char *dev_name)
{
struct path path;
int rc;
struct nameidata nd;
struct dentry *lower_root;
struct vfsmount *lower_mnt;
memset(&nd, 0, sizeof(struct nameidata));
rc = path_lookup(dev_name, LOOKUP_FOLLOW | LOOKUP_DIRECTORY, &nd);
rc = kern_path(dev_name, LOOKUP_FOLLOW | LOOKUP_DIRECTORY, &path);
if (rc) {
ecryptfs_printk(KERN_WARNING, "path_lookup() failed\n");
goto out;
}
lower_root = nd.path.dentry;
lower_mnt = nd.path.mnt;
ecryptfs_set_superblock_lower(sb, lower_root->d_sb);
sb->s_maxbytes = lower_root->d_sb->s_maxbytes;
sb->s_blocksize = lower_root->d_sb->s_blocksize;
ecryptfs_set_dentry_lower(sb->s_root, lower_root);
ecryptfs_set_dentry_lower_mnt(sb->s_root, lower_mnt);
rc = ecryptfs_interpose(lower_root, sb->s_root, sb, 0);
ecryptfs_set_superblock_lower(sb, path.dentry->d_sb);
sb->s_maxbytes = path.dentry->d_sb->s_maxbytes;
sb->s_blocksize = path.dentry->d_sb->s_blocksize;
ecryptfs_set_dentry_lower(sb->s_root, path.dentry);
ecryptfs_set_dentry_lower_mnt(sb->s_root, path.mnt);
rc = ecryptfs_interpose(path.dentry, sb->s_root, sb, 0);
if (rc)
goto out_free;
rc = 0;
goto out;
out_free:
path_put(&nd.path);
path_put(&path);
out:
return rc;
}

18
net/unix/af_unix.c
View File

@ -711,28 +711,30 @@ static struct sock *unix_find_other(struct net *net,
int type, unsigned hash, int *error)
{
struct sock *u;
struct nameidata nd;
struct path path;
int err = 0;
if (sunname->sun_path[0]) {
err = path_lookup(sunname->sun_path, LOOKUP_FOLLOW, &nd);
struct inode *inode;
err = kern_path(sunname->sun_path, LOOKUP_FOLLOW, &path);
if (err)
goto fail;
err = vfs_permission(&nd, MAY_WRITE);
inode = path.dentry->d_inode;
err = inode_permission(inode, MAY_WRITE);
if (err)
goto put_fail;
err = -ECONNREFUSED;
if (!S_ISSOCK(nd.path.dentry->d_inode->i_mode))
if (!S_ISSOCK(inode->i_mode))
goto put_fail;
u = unix_find_socket_byinode(net, nd.path.dentry->d_inode);
u = unix_find_socket_byinode(net, inode);
if (!u)
goto put_fail;
if (u->sk_type == type)
touch_atime(nd.path.mnt, nd.path.dentry);
touch_atime(path.mnt, path.dentry);
path_put(&nd.path);
path_put(&path);
err=-EPROTOTYPE;
if (u->sk_type != type) {
@ -753,7 +755,7 @@ static struct sock *unix_find_other(struct net *net,
return u;
put_fail:
path_put(&nd.path);
path_put(&path);
fail:
*error=err;
return NULL;