static int v9fs_get_sb(struct file_system_type *fs_type, int flags,
const char *dev_name, void *data,
struct vfsmount *mnt)
{
struct super_block *sb = NULL;
struct inode *inode = NULL;
struct dentry *root = NULL;
struct v9fs_session_info *v9ses = NULL;
int mode = S_IRWXUGO | S_ISVTX;
struct p9_fid *fid;
int retval = 0;
P9_DPRINTK(P9_DEBUG_VFS, " \n");
v9ses = kzalloc(sizeof(struct v9fs_session_info), GFP_KERNEL);
if (!v9ses)
return -ENOMEM;
fid = v9fs_session_init(v9ses, dev_name, data);
if (IS_ERR(fid)) {
retval = PTR_ERR(fid);
/*
* we need to call session_close to tear down some
* of the data structure setup by session_init
*/
goto close_session;
}
sb = sget(fs_type, NULL, v9fs_set_super, v9ses);
if (IS_ERR(sb)) {
retval = PTR_ERR(sb);
goto clunk_fid;
}
v9fs_fill_super(sb, v9ses, flags, data);
inode = v9fs_get_inode(sb, S_IFDIR | mode);
if (IS_ERR(inode)) {
retval = PTR_ERR(inode);
goto release_sb;
}
root = d_alloc_root(inode);
if (!root) {
iput(inode);
retval = -ENOMEM;
goto release_sb;
}
sb->s_root = root;
if (v9fs_proto_dotl(v9ses)) {
struct p9_stat_dotl *st = NULL;
st = p9_client_getattr_dotl(fid, P9_STATS_BASIC);
if (IS_ERR(st)) {
retval = PTR_ERR(st);
goto release_sb;
}
v9fs_stat2inode_dotl(st, root->d_inode);
kfree(st);
} else {
struct p9_wstat *st = NULL;
st = p9_client_stat(fid);
if (IS_ERR(st)) {
retval = PTR_ERR(st);
goto release_sb;
}
root->d_inode->i_ino = v9fs_qid2ino(&st->qid);
v9fs_stat2inode(st, root->d_inode, sb);
p9stat_free(st);
kfree(st);
}
retval = v9fs_get_acl(inode, fid);
if (retval)
goto release_sb;
v9fs_fid_add(root, fid);
P9_DPRINTK(P9_DEBUG_VFS, " simple set mount, return 0\n");
simple_set_mnt(mnt, sb);
return 0;
clunk_fid:
p9_client_clunk(fid);
close_session:
v9fs_session_close(v9ses);
kfree(v9ses);
return retval;
release_sb:
/*
* we will do the session_close and root dentry release
* in the below call. But we need to clunk fid, because we haven't
* attached the fid to dentry so it won't get clunked
* automatically.
*/
p9_client_clunk(fid);
deactivate_locked_super(sb);
return retval;
}
static int v9fs_get_sb(struct file_system_type *fs_type, int flags,
const char *dev_name, void *data,
struct vfsmount *mnt)
{
struct super_block *sb = NULL;
struct inode *inode = NULL;
struct dentry *root = NULL;
struct v9fs_session_info *v9ses = NULL;
struct p9_stat *st = NULL;
int mode = S_IRWXUGO | S_ISVTX;
uid_t uid = current->fsuid;
gid_t gid = current->fsgid;
struct p9_fid *fid;
int retval = 0;
P9_DPRINTK(P9_DEBUG_VFS, " \n");
st = NULL;
v9ses = kzalloc(sizeof(struct v9fs_session_info), GFP_KERNEL);
if (!v9ses)
return -ENOMEM;
fid = v9fs_session_init(v9ses, dev_name, data);
if (IS_ERR(fid)) {
retval = PTR_ERR(fid);
fid = NULL;
kfree(v9ses);
v9ses = NULL;
goto error;
}
st = p9_client_stat(fid);
if (IS_ERR(st)) {
retval = PTR_ERR(st);
goto error;
}
sb = sget(fs_type, NULL, v9fs_set_super, v9ses);
if (IS_ERR(sb)) {
retval = PTR_ERR(sb);
goto error;
}
v9fs_fill_super(sb, v9ses, flags);
inode = v9fs_get_inode(sb, S_IFDIR | mode);
if (IS_ERR(inode)) {
retval = PTR_ERR(inode);
goto error;
}
inode->i_uid = uid;
inode->i_gid = gid;
root = d_alloc_root(inode);
if (!root) {
retval = -ENOMEM;
goto error;
}
sb->s_root = root;
root->d_inode->i_ino = v9fs_qid2ino(&st->qid);
v9fs_stat2inode(st, root->d_inode, sb);
v9fs_fid_add(root, fid);
kfree(st);
return simple_set_mnt(mnt, sb);
error:
kfree(st);
if (fid)
p9_client_clunk(fid);
if (v9ses) {
v9fs_session_close(v9ses);
kfree(v9ses);
}
if (sb) {
up_write(&sb->s_umount);
deactivate_super(sb);
}
return retval;
}
static struct dentry *v9fs_mount(struct file_system_type *fs_type, int flags,
const char *dev_name, void *data)
{
struct super_block *sb = NULL;
struct inode *inode = NULL;
struct dentry *root = NULL;
struct v9fs_session_info *v9ses = NULL;
umode_t mode = S_IRWXUGO | S_ISVTX;
struct p9_fid *fid;
int retval = 0;
p9_debug(P9_DEBUG_VFS, "\n");
v9ses = kzalloc(sizeof(struct v9fs_session_info), GFP_KERNEL);
if (!v9ses)
return ERR_PTR(-ENOMEM);
fid = v9fs_session_init(v9ses, dev_name, data);
if (IS_ERR(fid)) {
retval = PTR_ERR(fid);
goto free_session;
}
sb = sget(fs_type, NULL, v9fs_set_super, flags, v9ses);
if (IS_ERR(sb)) {
retval = PTR_ERR(sb);
goto clunk_fid;
}
v9fs_fill_super(sb, v9ses, flags, data);
if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
sb->s_d_op = &v9fs_cached_dentry_operations;
else
sb->s_d_op = &v9fs_dentry_operations;
inode = v9fs_get_inode(sb, S_IFDIR | mode, 0);
if (IS_ERR(inode)) {
retval = PTR_ERR(inode);
goto release_sb;
}
root = d_make_root(inode);
if (!root) {
retval = -ENOMEM;
goto release_sb;
}
sb->s_root = root;
if (v9fs_proto_dotl(v9ses)) {
struct p9_stat_dotl *st = NULL;
st = p9_client_getattr_dotl(fid, P9_STATS_BASIC);
if (IS_ERR(st)) {
retval = PTR_ERR(st);
goto release_sb;
}
d_inode(root)->i_ino = v9fs_qid2ino(&st->qid);
v9fs_stat2inode_dotl(st, d_inode(root));
kfree(st);
} else {
struct p9_wstat *st = NULL;
st = p9_client_stat(fid);
if (IS_ERR(st)) {
retval = PTR_ERR(st);
goto release_sb;
}
d_inode(root)->i_ino = v9fs_qid2ino(&st->qid);
v9fs_stat2inode(st, d_inode(root), sb);
p9stat_free(st);
kfree(st);
}
retval = v9fs_get_acl(inode, fid);
if (retval)
goto release_sb;
v9fs_fid_add(root, fid);
p9_debug(P9_DEBUG_VFS, " simple set mount, return 0\n");
return dget(sb->s_root);
clunk_fid:
p9_client_clunk(fid);
v9fs_session_close(v9ses);
free_session:
kfree(v9ses);
return ERR_PTR(retval);
release_sb:
/*
* we will do the session_close and root dentry release
* in the below call. But we need to clunk fid, because we haven't
* attached the fid to dentry so it won't get clunked
* automatically.
*/
p9_client_clunk(fid);
deactivate_locked_super(sb);
return ERR_PTR(retval);
}