/**
* Export lookup
That API attempts to find out the fid associated with a parent fid and a name
*/
void expgw_lookup_1_svc(epgw_lookup_arg_t * arg, expgw_ctx_t *req_ctx_p)
{
static epgw_mattr_ret_t ret;
expgw_fid_key_t key;
expgw_fid_cache_t *cache_fid_entry_p;
expgw_attr_cache_t *cache_attr_entry_p;
int export_lbg_id;
int status;
int local;
ret.parent_attr.status = EP_EMPTY;
/**
* Get the lbg_id associated with the exportd
*/
export_lbg_id = expgw_get_exportd_lbg(arg->arg_gw.eid);
if (export_lbg_id < 0)
{
expgw_reply_error_no_such_eid(req_ctx_p,arg->arg_gw.eid);
expgw_release_context(req_ctx_p);
return;
}
/*
** check if the fid is handled by the current export gateway
** if the fid is not handled by it must operates in passthrough mode
** and must not update the cache
*/
local = expgw_check_local(arg->arg_gw.eid,(unsigned char *)arg->arg_gw.parent);
if (local != 0)
{
/*
** the export gateway must operate in passthrough mode
*/
status = expgw_routing_rq_common(req_ctx_p,arg->arg_gw.eid,(unsigned char *)arg->arg_gw.parent,0,0,expgw_lookup_cbk,req_ctx_p);
if (status < 0)
{
goto error;
}
goto out;
}
/*
** OK, the fid is handled by this server, so attempt to get the child fid
** from the cache
*/
expgw_fid_build_key(&key,(unsigned char *)arg->arg_gw.parent,arg->arg_gw.name);
/*
** do the lookup
*/
cache_fid_entry_p = com_cache_bucket_search_entry(expgw_fid_cache_p,&key);
if (cache_fid_entry_p == NULL)
{
/*
** entry has not be found in the cache, needs to interrogate the exportd
** pre-allocate a cache fid entry
*/
req_ctx_p->fid_cache_entry = expgw_fid_alloc_entry((unsigned char*)arg->arg_gw.parent,arg->arg_gw.name,NULL);
status = expgw_forward_rq_common(req_ctx_p,export_lbg_id,0,0,expgw_lookup_cbk,req_ctx_p);
if (status < 0)
{
goto error;
}
goto out;
}
/*
** OK, there is a match, check if it is the same export gateway that handles the
** attributes: if it is not the case, the system replies with an empty attribute array
*/
local = expgw_check_local(arg->arg_gw.eid,cache_fid_entry_p->fid);
if (local == 0)
{
/*
** do the lookup on the attributes cache
*/
cache_attr_entry_p = com_cache_bucket_search_entry(expgw_attr_cache_p,cache_fid_entry_p->fid);
if (cache_attr_entry_p != NULL)
{
/*
** entry has been found, copy the attributes in the response buffer
*/
memcpy(&ret.status_gw.ep_mattr_ret_t_u.attrs, &cache_attr_entry_p->attr, sizeof (mattr_t));
ret.status_gw.status = EP_SUCCESS;
/*
** use the receive buffer for the reply
*/
req_ctx_p->xmitBuf = req_ctx_p->recv_buf;
req_ctx_p->recv_buf = NULL;
expgw_forward_reply(req_ctx_p,(char*)&ret);
/*
** release the context
*/
expgw_release_context(req_ctx_p);
goto out;
}
}
/*
** either the attributes are not in the cache or the gateway is not the owner of the slice
** need to request the attributes from the exportd
*/
epgw_mfile_arg_t arg_attr;
req_ctx_p->response_cbk = expgw_lookup_cbk;
arg_attr.arg_gw.eid = arg->arg_gw.eid;
memcpy(arg_attr.arg_gw.fid, cache_fid_entry_p->fid, sizeof (uuid_t));
/*
** route the request either to the target export gateway or to the master exportd
*/
#if 1
status = expgw_export_build_and_route_common( arg->arg_gw.eid,(unsigned char *)cache_fid_entry_p->fid,
EXPORT_PROGRAM,EXPORT_VERSION, EP_GETATTR,
(xdrproc_t)xdr_epgw_mfile_arg_t , &arg_attr,
expgw_generic_export_reply_cbk,req_ctx_p) ;
#else
status = expgw_export_build_and_send_common( lbg_id,EXPORT_PROGRAM,EXPORT_VERSION, EP_GETATTR,
(xdrproc_t)xdr_epgw_mfile_arg_t , &arg_attr,
expgw_generic_export_reply_cbk,req_ctx_p) ;
#endif
if (status < 0)
{
goto error;
}
goto out;
error:
expgw_reply_error(req_ctx_p,errno);
/*
** release the context
*/
expgw_release_context(req_ctx_p);
out:
return;
}
/**
Application callBack:
THis the callback that is activated upon the recption of an exportd
request from a rozofsmount client
@param socket_ctx_p: pointer to the af unix socket
@param socketId: reference of the socket (not used)
@retval : TRUE-> xmit ready event expected
@retval : FALSE-> xmit ready event not expected
*/
void expgw_rozofs_req_rcv_cbk(void *userRef,uint32_t socket_ctx_idx, void *recv_buf)
{
uint32_t *com_hdr_p;
rozofs_rpc_call_hdr_t hdr;
expgw_ctx_t *expgw_ctx_p = NULL;
com_hdr_p = (uint32_t*) ruc_buf_getPayload(recv_buf);
com_hdr_p +=1; /* skip the size of the rpc message */
memcpy(&hdr,com_hdr_p,sizeof(rozofs_rpc_call_hdr_t));
scv_call_hdr_ntoh(&hdr);
/*
** allocate a context for the duration of the transaction since it might be possible
** that the gateway needs to interrogate the exportd and thus needs to save the current
** request until receiving the response from the exportd
*/
expgw_ctx_p = expgw_alloc_context();
if (expgw_ctx_p == NULL)
{
fatal(" Out of exportd gateway context");
}
/*
** save the initial transaction id, received buffer and reference of the connection
*/
expgw_ctx_p->src_transaction_id = hdr.hdr.xid;
expgw_ctx_p->recv_buf = recv_buf;
expgw_ctx_p->socketRef = socket_ctx_idx;
union {
ep_path_t ep_mount_1_arg;
uint32_t ep_umount_1_arg;
uint32_t ep_statfs_1_arg;
epgw_lookup_arg_t ep_lookup_1_arg;
epgw_mfile_arg_t ep_getattr_1_arg;
epgw_setattr_arg_t ep_setattr_1_arg;
epgw_mfile_arg_t ep_readlink_1_arg;
epgw_mknod_arg_t ep_mknod_1_arg;
epgw_mkdir_arg_t ep_mkdir_1_arg;
epgw_unlink_arg_t ep_unlink_1_arg;
epgw_rmdir_arg_t ep_rmdir_1_arg;
epgw_symlink_arg_t ep_symlink_1_arg;
epgw_rename_arg_t ep_rename_1_arg;
epgw_readdir_arg_t ep_readdir_1_arg;
epgw_io_arg_t ep_read_block_1_arg;
epgw_write_block_arg_t ep_write_block_1_arg;
epgw_link_arg_t ep_link_1_arg;
epgw_setxattr_arg_t ep_setxattr_1_arg;
epgw_getxattr_arg_t ep_getxattr_1_arg;
epgw_removexattr_arg_t ep_removexattr_1_arg;
epgw_listxattr_arg_t ep_listxattr_1_arg;
uint16_t ep_list_cluster_1_arg;
} argument;
xdrproc_t _xdr_argument, _xdr_result;
char *(*local)(char *, struct svc_req *);
switch (hdr.proc) {
#if 0
case EP_NULL:
_xdr_argument = (xdrproc_t) xdr_void;
_xdr_result = (xdrproc_t) xdr_void;
local = (char *(*)(char *, struct svc_req *)) ep_null_1_svc;
break;
case EP_MOUNT:
_xdr_argument = (xdrproc_t) xdr_ep_path_t;
_xdr_result = (xdrproc_t) xdr_ep_mount_ret_t;
local = (char *(*)(char *, struct svc_req *)) ep_mount_1_svc;
break;
case EP_UMOUNT:
_xdr_argument = (xdrproc_t) xdr_uint32_t;
_xdr_result = (xdrproc_t) xdr_epgw_status_ret_t;
local = (char *(*)(char *, struct svc_req *)) ep_umount_1_svc;
break;
case EP_STATFS:
_xdr_argument = (xdrproc_t) xdr_uint32_t;
_xdr_result = (xdrproc_t) xdr_ep_statfs_ret_t;
local = (char *(*)(char *, struct svc_req *)) ep_statfs_1_svc;
break;
#endif
case EP_LOOKUP:
START_PROFILING_EXPGW(expgw_ctx_p,ep_lookup);
_xdr_argument = (xdrproc_t) xdr_epgw_lookup_arg_t;
_xdr_result = (xdrproc_t) xdr_epgw_mattr_ret_t;
local = (char *(*)(char *, struct svc_req *)) expgw_lookup_1_svc;
break;
case EP_GETATTR:
START_PROFILING_EXPGW(expgw_ctx_p,ep_getattr);
_xdr_argument = (xdrproc_t) xdr_epgw_mfile_arg_t;
_xdr_result = (xdrproc_t) xdr_epgw_mattr_ret_t;
local = (char *(*)(char *, struct svc_req *)) expgw_getattr_1_svc;
break;
case EP_SETATTR:
START_PROFILING_EXPGW(expgw_ctx_p,ep_setattr);
_xdr_argument = (xdrproc_t) xdr_epgw_setattr_arg_t;
_xdr_result = (xdrproc_t) xdr_epgw_mattr_ret_t;
local = (char *(*)(char *, struct svc_req *)) expgw_setattr_1_svc;
break;
#if 0
case EP_READLINK:
START_PROFILING_EXPGW(expgw_ctx_p,ep_readlink);
_xdr_argument = (xdrproc_t) xdr_ep_mfile_arg_t;
_xdr_result = (xdrproc_t) xdr_ep_readlink_ret_t;
local = (char *(*)(char *, struct svc_req *)) ep_readlink_1_svc;
break;
#endif
case EP_MKNOD:
START_PROFILING_EXPGW(expgw_ctx_p,ep_mknod);
_xdr_argument = (xdrproc_t) xdr_epgw_mknod_arg_t;
_xdr_result = (xdrproc_t) xdr_epgw_mattr_ret_t;
local = (char *(*)(char *, struct svc_req *)) expgw_mknod_1_svc;
break;
case EP_MKDIR:
START_PROFILING_EXPGW(expgw_ctx_p,ep_mkdir);
_xdr_argument = (xdrproc_t) xdr_epgw_mkdir_arg_t;
_xdr_result = (xdrproc_t) xdr_epgw_mattr_ret_t;
local = (char *(*)(char *, struct svc_req *)) expgw_mkdir_1_svc;
break;
case EP_UNLINK:
START_PROFILING_EXPGW(expgw_ctx_p,ep_unlink);
_xdr_argument = (xdrproc_t) xdr_epgw_unlink_arg_t;
_xdr_result = (xdrproc_t) xdr_epgw_fid_ret_t;
local = (char *(*)(char *, struct svc_req *)) expgw_unlink_1_svc;
break;
case EP_RMDIR:
START_PROFILING_EXPGW(expgw_ctx_p,ep_rmdir);
_xdr_argument = (xdrproc_t) xdr_epgw_rmdir_arg_t;
_xdr_result = (xdrproc_t) xdr_epgw_fid_ret_t;
local = (char *(*)(char *, struct svc_req *)) expgw_rmdir_1_svc;
break;
case EP_SYMLINK:
START_PROFILING_EXPGW(expgw_ctx_p,ep_symlink);
_xdr_argument = (xdrproc_t) xdr_epgw_symlink_arg_t;
_xdr_result = (xdrproc_t) xdr_epgw_mattr_ret_t;
local = (char *(*)(char *, struct svc_req *)) expgw_symlink_1_svc;
break;
#if 0
case EP_RENAME:
START_PROFILING_EXPGW(expgw_ctx_p,ep_rename);
_xdr_argument = (xdrproc_t) xdr_ep_rename_arg_t;
_xdr_result = (xdrproc_t) xdr_ep_fid_ret_t;
local = (char *(*)(char *, struct svc_req *)) ep_rename_1_svc;
break;
case EP_READDIR:
START_PROFILING_EXPGW(expgw_ctx_p,ep_readdir);
_xdr_argument = (xdrproc_t) xdr_ep_readdir_arg_t;
_xdr_result = (xdrproc_t) xdr_ep_readdir_ret_t;
local = (char *(*)(char *, struct svc_req *)) ep_readdir_1_svc;
break;
case EP_READ_BLOCK:
START_PROFILING_EXPGW(expgw_ctx_p,ep_read_block);
_xdr_argument = (xdrproc_t) xdr_ep_io_arg_t;
_xdr_result = (xdrproc_t) xdr_ep_read_block_ret_t;
local = (char *(*)(char *, struct svc_req *)) ep_read_block_1_svc;
break;
#endif
case EP_WRITE_BLOCK:
START_PROFILING_EXPGW(expgw_ctx_p,ep_write_block);
_xdr_argument = (xdrproc_t) xdr_epgw_write_block_arg_t;
_xdr_result = (xdrproc_t) xdr_epgw_mattr_ret_t;
local = (char *(*)(char *, struct svc_req *)) expgw_write_block_1_svc;
break;
case EP_LINK:
START_PROFILING_EXPGW(expgw_ctx_p,ep_link);
_xdr_argument = (xdrproc_t) xdr_epgw_link_arg_t;
_xdr_result = (xdrproc_t) xdr_epgw_mattr_ret_t;
local = (char *(*)(char *, struct svc_req *)) expgw_link_1_svc;
break;
#if 0
case EP_SETXATTR:
START_PROFILING_EXPGW(expgw_ctx_p,ep_setxattr);
_xdr_argument = (xdrproc_t) xdr_ep_setxattr_arg_t;
_xdr_result = (xdrproc_t) xdr_epgw_status_ret_t;
local = (char *(*)(char *, struct svc_req *)) ep_setxattr_1_svc;
break;
case EP_GETXATTR:
START_PROFILING_EXPGW(expgw_ctx_p,ep_getxattr);
_xdr_argument = (xdrproc_t) xdr_ep_getxattr_arg_t;
_xdr_result = (xdrproc_t) xdr_ep_getxattr_ret_t;
local = (char *(*)(char *, struct svc_req *)) ep_getxattr_1_svc;
break;
case EP_REMOVEXATTR:
START_PROFILING_EXPGW(expgw_ctx_p,ep_removexattr);
_xdr_argument = (xdrproc_t) xdr_ep_removexattr_arg_t;
_xdr_result = (xdrproc_t) xdr_epgw_status_ret_t;
local = (char *(*)(char *, struct svc_req *)) ep_removexattr_1_svc;
break;
case EP_LISTXATTR:
START_PROFILING_EXPGW(expgw_ctx_p,ep_listxattr);
_xdr_argument = (xdrproc_t) xdr_ep_listxattr_arg_t;
_xdr_result = (xdrproc_t) xdr_ep_listxattr_ret_t;
local = (char *(*)(char *, struct svc_req *)) ep_listxattr_1_svc;
break;
case EP_LIST_CLUSTER:
_xdr_argument = (xdrproc_t) xdr_uint16_t;
_xdr_result = (xdrproc_t) xdr_ep_cluster_ret_t;
local = (char *(*)(char *, struct svc_req *)) ep_list_cluster_1_svc;
break;
#endif
default:
expgw_ctx_p->xmitBuf = expgw_ctx_p->recv_buf;
expgw_ctx_p->recv_buf = NULL;
errno = EPROTO;
expgw_reply_error(expgw_ctx_p,errno);
expgw_release_context(expgw_ctx_p);
return;
}
memset ((char *)&argument, 0, sizeof (argument));
/*
** save the result encoding/decoding function
*/
expgw_ctx_p->xdr_result = _xdr_result;
if (!expgw_getargs (recv_buf, (xdrproc_t) _xdr_argument, (caddr_t) &argument)) {
expgw_ctx_p->xmitBuf = expgw_ctx_p->recv_buf;
expgw_ctx_p->recv_buf = NULL;
expgw_reply_error(expgw_ctx_p,errno);
/*
** release the context
*/
xdr_free((xdrproc_t)_xdr_argument, (caddr_t) &argument);
expgw_release_context(expgw_ctx_p);
return;
}
/*
** call the user call-back
*/
(*local)((char *)&argument, (void*)expgw_ctx_p);
/*
** release any data allocated while decoding
*/
xdr_free((xdrproc_t)_xdr_argument, (caddr_t) &argument);
}
