static int nfs_callback_authenticate(struct svc_rqst *rqstp)
{
struct nfs_client *clp;
RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]);
int ret = SVC_OK;
/* Don't talk to strangers */
clp = nfs_find_client(svc_addr(rqstp), 4);
if (clp == NULL)
return SVC_DROP;
dprintk("%s: %s NFSv4 callback!\n", __func__,
svc_print_addr(rqstp, buf, sizeof(buf)));
switch (rqstp->rq_authop->flavour) {
case RPC_AUTH_NULL:
if (rqstp->rq_proc != CB_NULL)
ret = SVC_DENIED;
break;
case RPC_AUTH_UNIX:
break;
case RPC_AUTH_GSS:
ret = check_gss_callback_principal(clp, rqstp);
break;
default:
ret = SVC_DENIED;
}
nfs_put_client(clp);
return ret;
}
/* Reduce the fore channel's max_slots to the target value */
__be32 nfs4_callback_recallslot(struct cb_recallslotargs *args, void *dummy)
{
struct nfs_client *clp;
struct nfs4_slot_table *fc_tbl;
__be32 status;
status = htonl(NFS4ERR_OP_NOT_IN_SESSION);
clp = nfs_find_client(args->crsa_addr, 4);
if (clp == NULL)
goto out;
dprintk("NFS: CB_RECALL_SLOT request from %s target max slots %d\n",
rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
args->crsa_target_max_slots);
fc_tbl = &clp->cl_session->fc_slot_table;
status = htonl(NFS4ERR_BAD_HIGH_SLOT);
if (args->crsa_target_max_slots > fc_tbl->max_slots ||
args->crsa_target_max_slots < 1)
goto out_putclient;
status = htonl(NFS4_OK);
if (args->crsa_target_max_slots == fc_tbl->max_slots)
goto out_putclient;
fc_tbl->target_max_slots = args->crsa_target_max_slots;
nfs41_handle_recall_slot(clp);
out_putclient:
nfs_put_client(clp); /* balance nfs_find_client */
out:
dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
return status;
}
/*
* Returns a pointer to a held 'struct nfs_client' that matches the server's
* address, major version number, and session ID. It is the caller's
* responsibility to release the returned reference.
*
* Returns NULL if there are no connections with sessions, or if no session
* matches the one of interest.
*/
static struct nfs_client *find_client_with_session(
const struct sockaddr *addr, u32 nfsversion,
struct nfs4_sessionid *sessionid)
{
struct nfs_client *clp;
clp = nfs_find_client(addr, 4);
if (clp == NULL)
return NULL;
do {
struct nfs_client *prev = clp;
if (clp->cl_session != NULL) {
if (memcmp(clp->cl_session->sess_id.data,
sessionid->data,
NFS4_MAX_SESSIONID_LEN) == 0) {
/* Returns a held reference to clp */
return clp;
}
}
clp = nfs_find_client_next(prev);
nfs_put_client(prev);
} while (clp != NULL);
return NULL;
}
static __be32 nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *resp)
{
struct cb_compound_hdr_arg hdr_arg = { 0 };
struct cb_compound_hdr_res hdr_res = { NULL };
struct xdr_stream xdr_in, xdr_out;
__be32 *p, status;
struct cb_process_state cps = {
.drc_status = 0,
.clp = NULL,
.slotid = NFS4_NO_SLOT,
.net = rqstp->rq_xprt->xpt_net,
};
unsigned int nops = 0;
dprintk("%s: start\n", __func__);
xdr_init_decode(&xdr_in, &rqstp->rq_arg, rqstp->rq_arg.head[0].iov_base);
p = (__be32*)((char *)rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len);
xdr_init_encode(&xdr_out, &rqstp->rq_res, p);
status = decode_compound_hdr_arg(&xdr_in, &hdr_arg);
if (status == __constant_htonl(NFS4ERR_RESOURCE))
return rpc_garbage_args;
if (hdr_arg.minorversion == 0) {
cps.clp = nfs4_find_client_ident(rqstp->rq_xprt->xpt_net, hdr_arg.cb_ident);
if (!cps.clp || !check_gss_callback_principal(cps.clp, rqstp))
return rpc_drop_reply;
}
hdr_res.taglen = hdr_arg.taglen;
hdr_res.tag = hdr_arg.tag;
if (encode_compound_hdr_res(&xdr_out, &hdr_res) != 0)
return rpc_system_err;
while (status == 0 && nops != hdr_arg.nops) {
status = process_op(hdr_arg.minorversion, nops, rqstp,
&xdr_in, argp, &xdr_out, resp, &cps);
nops++;
}
if (unlikely(status == htonl(NFS4ERR_RESOURCE_HDR))) {
status = htonl(NFS4ERR_RESOURCE);
nops--;
}
*hdr_res.status = status;
*hdr_res.nops = htonl(nops);
nfs4_cb_free_slot(&cps);
nfs_put_client(cps.clp);
dprintk("%s: done, status = %u\n", __func__, ntohl(status));
return rpc_success;
}
static struct callback_op callback_ops[] = {
[0] = {
.res_maxsize = CB_OP_HDR_RES_MAXSZ,
},
__be32 nfs4_callback_sequence(struct cb_sequenceargs *args,
struct cb_sequenceres *res)
{
struct nfs_client *clp;
int i;
__be32 status;
status = htonl(NFS4ERR_BADSESSION);
clp = find_client_with_session(args->csa_addr, 4, &args->csa_sessionid);
if (clp == NULL)
goto out;
status = validate_seqid(&clp->cl_session->bc_slot_table, args);
if (status)
goto out_putclient;
/*
* Check for pending referring calls. If a match is found, a
* related callback was received before the response to the original
* call.
*/
if (referring_call_exists(clp, args->csa_nrclists, args->csa_rclists)) {
status = htonl(NFS4ERR_DELAY);
goto out_putclient;
}
memcpy(&res->csr_sessionid, &args->csa_sessionid,
sizeof(res->csr_sessionid));
res->csr_sequenceid = args->csa_sequenceid;
res->csr_slotid = args->csa_slotid;
res->csr_highestslotid = NFS41_BC_MAX_CALLBACKS - 1;
res->csr_target_highestslotid = NFS41_BC_MAX_CALLBACKS - 1;
out_putclient:
nfs_put_client(clp);
out:
for (i = 0; i < args->csa_nrclists; i++)
kfree(args->csa_rclists[i].rcl_refcalls);
kfree(args->csa_rclists);
if (status == htonl(NFS4ERR_RETRY_UNCACHED_REP))
res->csr_status = 0;
else
res->csr_status = status;
dprintk("%s: exit with status = %d res->csr_status %d\n", __func__,
ntohl(status), ntohl(res->csr_status));
return status;
}
__be32 nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres *res)
{
struct nfs_client *clp;
struct nfs_delegation *delegation;
struct nfs_inode *nfsi;
struct inode *inode;
res->bitmap[0] = res->bitmap[1] = 0;
res->status = htonl(NFS4ERR_BADHANDLE);
clp = nfs_find_client(args->addr, 4);
if (clp == NULL)
goto out;
dprintk("NFS: GETATTR callback request from %s\n",
rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR));
inode = nfs_delegation_find_inode(clp, &args->fh);
if (inode == NULL)
goto out_putclient;
nfsi = NFS_I(inode);
rcu_read_lock();
delegation = rcu_dereference(nfsi->delegation);
if (delegation == NULL || (delegation->type & FMODE_WRITE) == 0)
goto out_iput;
res->size = i_size_read(inode);
res->change_attr = delegation->change_attr;
if (nfsi->npages != 0)
res->change_attr++;
res->ctime = inode->i_ctime;
res->mtime = inode->i_mtime;
res->bitmap[0] = (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE) &
args->bitmap[0];
res->bitmap[1] = (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY) &
args->bitmap[1];
res->status = 0;
out_iput:
rcu_read_unlock();
iput(inode);
out_putclient:
nfs_put_client(clp);
out:
dprintk("%s: exit with status = %d\n", __func__, ntohl(res->status));
return res->status;
}
__be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy)
{
struct nfs_client *clp;
struct inode *inode;
__be32 res;
res = htonl(NFS4ERR_BADHANDLE);
clp = nfs_find_client(args->addr, 4);
if (clp == NULL)
goto out;
dprintk("NFS: RECALL callback request from %s\n",
rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR));
do {
struct nfs_client *prev = clp;
inode = nfs_delegation_find_inode(clp, &args->fh);
if (inode != NULL) {
/* Set up a helper thread to actually return the delegation */
switch (nfs_async_inode_return_delegation(inode, &args->stateid,
nfs_validate_delegation_stateid(clp))) {
case 0:
res = 0;
break;
case -ENOENT:
if (res != 0)
res = htonl(NFS4ERR_BAD_STATEID);
break;
default:
res = htonl(NFS4ERR_RESOURCE);
}
iput(inode);
}
clp = nfs_find_client_next(prev);
nfs_put_client(prev);
} while (clp != NULL);
out:
dprintk("%s: exit with status = %d\n", __func__, ntohl(res));
return res;
}
int migrate_nfs_update_server(struct nfs_server *server, const char *hostname,
struct sockaddr *sap, size_t salen, struct net *net)
{
struct nfs_client *clp = server->nfs_client;
struct rpc_clnt *clnt = server->client;
struct xprt_create xargs = {
.ident = clp->cl_proto,
.net = net,
.dstaddr = sap,
.addrlen = salen,
.servername = hostname,
};
char buf[INET6_ADDRSTRLEN + 1];
struct sockaddr_storage address;
struct sockaddr *localaddr = (struct sockaddr *)&address;
int error;
dfprintk(MOUNT, "zql: --> %s: move FSID %llx:%llx to \"%s\")\n", __func__,
(unsigned long long)server->fsid.major,
(unsigned long long)server->fsid.minor,
hostname);
error = rpc_switch_client_transport(clnt, &xargs, clnt->cl_timeout);
if (error != 0) {
dfprintk(MOUNT, "zql: <-- %s(): rpc_switch_client_transport returned %d\n",
__func__, error);
goto out;
}
error = rpc_localaddr(clnt, localaddr, sizeof(address));
if (error != 0) {
dfprintk(MOUNT, "zql: <-- %s(): rpc_localaddr returned %d\n",
__func__, error);
goto out;
}
error = -EAFNOSUPPORT;
if (rpc_ntop(localaddr, buf, sizeof(buf)) == 0) {
dfprintk(MOUNT, "zql: <-- %s(): rpc_ntop returned %d\n",
__func__, error);
goto out;
}
nfs_server_remove_lists(server);
error = migrate_nfs_set_client(server, hostname, sap, salen, buf,
clp->cl_rpcclient->cl_auth->au_flavor,
clp->cl_proto, clnt->cl_timeout,
clp->cl_minorversion, net);
nfs_put_client(clp);
if (error != 0) {
nfs_server_insert_lists(server);
dfprintk(MOUNT, "zql: <-- %s(): nfs4_set_client returned %d\n",
__func__, error);
goto out;
}
if (server->nfs_client->cl_hostname == NULL)
server->nfs_client->cl_hostname = kstrdup(hostname, GFP_KERNEL);
nfs_server_insert_lists(server);
error = migrate_nfs_probe_destination(server);
if (error < 0) {
dfprintk(MOUNT, "zql: error in migrate_nfs_probe_destination\n");
goto out;
}
dfprintk(MOUNT, "zql: <-- %s() succeeded\n", __func__);
out:
dfprintk(MOUNT, "zql: error in %s()\n", __func__);
return error;
}
static void zql_update_server(struct nfs_server *server)
{
/*
* we do not have to free server,
* instead, we only update struct nfs_server.
*/
//nfs_free_server(server);
/* free old nfs_client, though we can leave it there and use it when switch back */
//server->nfs_client->rpc_ops->free_client(server->nfs_client);
//struct nfs_server parent_server;
//struct nfs_client *parent_client;
//struct nfs_subversion *nfs_mod;
struct nfs_parsed_mount_data *parsed;
//char raw_data[] = "addr=162.105.146.169,vers=3,proto=tcp,mountvers=3,mountproto=udp,mountport=20048";
/* keep old server parameter, copy original server to a temporary parameter */
//parent_server = *server;
//parent_client = parent_server.nfs_client;
/* generate nfs_parsed_mount_data */
parsed = nfs_alloc_parsed_mount_data();
if (parsed == NULL)
dfprintk(MOUNT, "zql: nfs_alloc_parsed_mount_data error\n");
/* init nfs_parsed_mount_data */
if (nfs_zql_control == 168)
migrate_nfs_validate_text_mount_data168(/*raw_data, */parsed/*, dev_name*/);
else if (nfs_zql_control == 169)
migrate_nfs_validate_text_mount_data169(parsed);
else
dfprintk(MOUNT, "zql: nfs_zql_control error\n");
migrate_nfs_update_server(server, parsed->nfs_server.hostname, (struct sockaddr *)&parsed->nfs_server.address,
parsed->nfs_server.addrlen, parsed->net);
/*nfs_mod = get_nfs_version(parsed->version);
if (IS_ERR(nfs_mod))
dfprintk(MOUNT, "zql: get_nfs_version error\n");*/
/* init server->nfs_client */
//migrate_nfs_set_client(server, parsed, nfs_mod, parent_server.client->cl_timeout);
//nfs_init_server_rpcclient(server, parent_server.client->cl_timeout, parsed->selected_flavor);
//put_nfs_version(nfs_mod);
nfs_free_parsed_mount_data(parsed);
return;
}
static void zql_control_test(struct nfs_server *server)
{
if (nfs_zql_control == 5 || nfs_zql_control == 168
|| nfs_zql_control == 169) {
dfprintk(MOUNT, "zql: control start ... %d\n", nfs_zql_control);
while (nfs_zql_control == 5) {
msleep_interruptible(500);
}
if (nfs_zql_control == 168 || nfs_zql_control == 169) {
spin_lock(&zql_switch_status);
if (switch_status == 0) {
switch_status = 1;
spin_unlock(&zql_switch_status);
dfprintk(MOUNT, "zql: switch succeed\n");
dfprintk(MOUNT, "zql: start update server\n");
zql_update_server(server);
switch_status = 0;
nfs_zql_control = 10;
dfprintk(MOUNT, "zql: update server done\n");
} else {
spin_unlock(&zql_switch_status);
dfprintk(MOUNT, "zql: switch_status check\n");
while (switch_status == 1) {
msleep_interruptible(100);
}
dfprintk(MOUNT, "zql: switch_status done\n");
}
}
else if (nfs_zql_control == 4)
dfprintk(MOUNT, "zql: switch failed\n");
else
dfprintk(MOUNT, "zql: unknown failure\n");
}
}
/* zql code end */
static const struct inode_operations nfs3_dir_inode_operations = {
.create = nfs_create,
.lookup = nfs_lookup,
.link = nfs_link,
.unlink = nfs_unlink,
.symlink = nfs_symlink,
.mkdir = nfs_mkdir,
.rmdir = nfs_rmdir,
.mknod = nfs_mknod,
.rename = nfs_rename,
.permission = nfs_permission,
.getattr = nfs_getattr,
.setattr = nfs_setattr,
#ifdef CONFIG_NFS_V3_ACL
.listxattr = nfs3_listxattr,
.getxattr = generic_getxattr,
.setxattr = generic_setxattr,
.removexattr = generic_removexattr,
.get_acl = nfs3_get_acl,
.set_acl = nfs3_set_acl,
#endif
};
static const struct inode_operations nfs3_file_inode_operations = {
.permission = nfs_permission,
.getattr = nfs_getattr,
.setattr = nfs_setattr,
#ifdef CONFIG_NFS_V3_ACL
.listxattr = nfs3_listxattr,
.getxattr = generic_getxattr,
.setxattr = generic_setxattr,
.removexattr = generic_removexattr,
.get_acl = nfs3_get_acl,
.set_acl = nfs3_set_acl,
#endif
};
const struct nfs_rpc_ops nfs_v3_clientops = {
.version = 3, /* protocol version */
.dentry_ops = &nfs_dentry_operations,
.dir_inode_ops = &nfs3_dir_inode_operations,
.file_inode_ops = &nfs3_file_inode_operations,
.file_ops = &nfs_file_operations,
.getroot = nfs3_proc_get_root,
.submount = nfs_submount,
.try_mount = nfs_try_mount,
.getattr = nfs3_proc_getattr,
.setattr = nfs3_proc_setattr,
.lookup = nfs3_proc_lookup,
.access = nfs3_proc_access,
.readlink = nfs3_proc_readlink,
.create = nfs3_proc_create,
.remove = nfs3_proc_remove,
.unlink_setup = nfs3_proc_unlink_setup,
.unlink_rpc_prepare = nfs3_proc_unlink_rpc_prepare,
.unlink_done = nfs3_proc_unlink_done,
.rename_setup = nfs3_proc_rename_setup,
.rename_rpc_prepare = nfs3_proc_rename_rpc_prepare,
.rename_done = nfs3_proc_rename_done,
.link = nfs3_proc_link,
.symlink = nfs3_proc_symlink,
.mkdir = nfs3_proc_mkdir,
.rmdir = nfs3_proc_rmdir,
.readdir = nfs3_proc_readdir,
.mknod = nfs3_proc_mknod,
.statfs = nfs3_proc_statfs,
.fsinfo = nfs3_proc_fsinfo,
.pathconf = nfs3_proc_pathconf,
.decode_dirent = nfs3_decode_dirent,
.pgio_rpc_prepare = nfs3_proc_pgio_rpc_prepare,
.read_setup = nfs3_proc_read_setup,
.read_done = nfs3_read_done,
.write_setup = nfs3_proc_write_setup,
.write_done = nfs3_write_done,
.commit_setup = nfs3_proc_commit_setup,
.commit_rpc_prepare = nfs3_proc_commit_rpc_prepare,
.commit_done = nfs3_commit_done,
.lock = nfs3_proc_lock,
.clear_acl_cache = forget_all_cached_acls,
.close_context = nfs_close_context,
.have_delegation = nfs3_have_delegation,
.return_delegation = nfs3_return_delegation,
.alloc_client = nfs_alloc_client,
.init_client = nfs_init_client,
.free_client = nfs_free_client,
.create_server = nfs3_create_server,
.clone_server = nfs3_clone_server,
};
/**
* nfs4_init_client - Initialise an NFS4 client record
*
* @clp: nfs_client to initialise
* @timeparms: timeout parameters for underlying RPC transport
* @ip_addr: callback IP address in presentation format
* @authflavor: authentication flavor for underlying RPC transport
*
* Returns pointer to an NFS client, or an ERR_PTR value.
*/
struct nfs_client *nfs4_init_client(struct nfs_client *clp,
const struct rpc_timeout *timeparms,
const char *ip_addr,
rpc_authflavor_t authflavour)
{
char buf[INET6_ADDRSTRLEN + 1];
struct nfs_client *old;
int error;
if (clp->cl_cons_state == NFS_CS_READY) {
/* the client is initialised already */
dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp);
return clp;
}
/* Check NFS protocol revision and initialize RPC op vector */
clp->rpc_ops = &nfs_v4_clientops;
if (clp->cl_minorversion != 0)
__set_bit(NFS_CS_INFINITE_SLOTS, &clp->cl_flags);
__set_bit(NFS_CS_DISCRTRY, &clp->cl_flags);
error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_GSS_KRB5I);
if (error == -EINVAL)
error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX);
if (error < 0)
goto error;
/* If no clientaddr= option was specified, find a usable cb address */
if (ip_addr == NULL) {
struct sockaddr_storage cb_addr;
struct sockaddr *sap = (struct sockaddr *)&cb_addr;
error = rpc_localaddr(clp->cl_rpcclient, sap, sizeof(cb_addr));
if (error < 0)
goto error;
error = rpc_ntop(sap, buf, sizeof(buf));
if (error < 0)
goto error;
ip_addr = (const char *)buf;
}
strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr));
error = nfs_idmap_new(clp);
if (error < 0) {
dprintk("%s: failed to create idmapper. Error = %d\n",
__func__, error);
goto error;
}
__set_bit(NFS_CS_IDMAP, &clp->cl_res_state);
error = nfs4_init_client_minor_version(clp);
if (error < 0)
goto error;
if (!nfs4_has_session(clp))
nfs_mark_client_ready(clp, NFS_CS_READY);
error = nfs4_discover_server_trunking(clp, &old);
if (error < 0)
goto error;
if (clp != old)
clp->cl_preserve_clid = true;
nfs_put_client(clp);
return old;
error:
nfs_mark_client_ready(clp, error);
nfs_put_client(clp);
dprintk("<-- nfs4_init_client() = xerror %d\n", error);
return ERR_PTR(error);
}
/*
* Decode, process and encode a COMPOUND
*/
static __be32 nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *resp)
{
struct cb_compound_hdr_arg hdr_arg = { 0 };
struct cb_compound_hdr_res hdr_res = { NULL };
struct xdr_stream xdr_in, xdr_out;
__be32 *p, status;
struct cb_process_state cps = {
.drc_status = 0,
.clp = NULL,
.net = SVC_NET(rqstp),
};
unsigned int nops = 0;
dprintk("%s: start\n", __func__);
xdr_init_decode(&xdr_in, &rqstp->rq_arg, rqstp->rq_arg.head[0].iov_base);
p = (__be32*)((char *)rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len);
xdr_init_encode(&xdr_out, &rqstp->rq_res, p);
status = decode_compound_hdr_arg(&xdr_in, &hdr_arg);
if (status == htonl(NFS4ERR_RESOURCE))
return rpc_garbage_args;
if (hdr_arg.minorversion == 0) {
cps.clp = nfs4_find_client_ident(SVC_NET(rqstp), hdr_arg.cb_ident);
if (!cps.clp || !check_gss_callback_principal(cps.clp, rqstp))
goto out_invalidcred;
}
cps.minorversion = hdr_arg.minorversion;
hdr_res.taglen = hdr_arg.taglen;
hdr_res.tag = hdr_arg.tag;
if (encode_compound_hdr_res(&xdr_out, &hdr_res) != 0)
return rpc_system_err;
while (status == 0 && nops != hdr_arg.nops) {
status = process_op(nops, rqstp, &xdr_in,
argp, &xdr_out, resp, &cps);
nops++;
}
/* Buffer overflow in decode_ops_hdr or encode_ops_hdr. Return
* resource error in cb_compound status without returning op */
if (unlikely(status == htonl(NFS4ERR_RESOURCE_HDR))) {
status = htonl(NFS4ERR_RESOURCE);
nops--;
}
*hdr_res.status = status;
*hdr_res.nops = htonl(nops);
nfs4_cb_free_slot(&cps);
nfs_put_client(cps.clp);
dprintk("%s: done, status = %u\n", __func__, ntohl(status));
return rpc_success;
out_invalidcred:
pr_warn_ratelimited("NFS: NFSv4 callback contains invalid cred\n");
return rpc_autherr_badcred;
}
/*
* Define NFS4 callback COMPOUND ops.
*/
static struct callback_op callback_ops[] = {
[0] = {
.res_maxsize = CB_OP_HDR_RES_MAXSZ,
},