int init_cluster_locking(struct locking_type *locking, struct cmd_context *cmd,
int suppress_messages)
{
locking->lock_resource = _lock_resource;
locking->query_resource = _query_resource;
locking->fin_locking = _locking_end;
locking->reset_locking = _reset_locking;
locking->flags = LCK_PRE_MEMLOCK | LCK_CLUSTERED;
_clvmd_sock = _open_local_sock(suppress_messages);
if (_clvmd_sock == -1)
return 0;
return 1;
}
/*
* Send a message to a(or all) node(s) in the cluster and wait for replies
*/
static int _cluster_request(char cmd, const char *node, void *data, int len,
lvm_response_t ** response, int *num)
{
char outbuf[sizeof(struct clvm_header) + len + strlen(node) + 1];
char *inptr;
char *retbuf = NULL;
int status;
int i;
int num_responses = 0;
struct clvm_header *head = (struct clvm_header *) outbuf;
lvm_response_t *rarray;
*num = 0;
if (_clvmd_sock == -1)
_clvmd_sock = _open_local_sock();
if (_clvmd_sock == -1)
return 0;
_build_header(head, cmd, node, len);
memcpy(head->node + strlen(head->node) + 1, data, len);
status = _send_request(outbuf, sizeof(struct clvm_header) +
strlen(head->node) + len, &retbuf);
if (!status)
goto out;
/* Count the number of responses we got */
head = (struct clvm_header *) retbuf;
inptr = head->args;
while (inptr[0]) {
num_responses++;
inptr += strlen(inptr) + 1;
inptr += sizeof(int);
inptr += strlen(inptr) + 1;
}
/*
* Allocate response array.
* With an extra pair of INTs on the front to sanity
* check the pointer when we are given it back to free
*/
*response = dm_malloc(sizeof(lvm_response_t) * num_responses +
sizeof(int) * 2);
if (!*response) {
errno = ENOMEM;
status = 0;
goto out;
}
rarray = *response;
/* Unpack the response into an lvm_response_t array */
inptr = head->args;
i = 0;
while (inptr[0]) {
strcpy(rarray[i].node, inptr);
inptr += strlen(inptr) + 1;
memcpy(&rarray[i].status, inptr, sizeof(int));
inptr += sizeof(int);
rarray[i].response = dm_malloc(strlen(inptr) + 1);
if (rarray[i].response == NULL) {
/* Free up everything else and return error */
int j;
for (j = 0; j < i; j++)
dm_free(rarray[i].response);
free(*response);
errno = ENOMEM;
status = -1;
goto out;
}
strcpy(rarray[i].response, inptr);
rarray[i].len = strlen(inptr);
inptr += strlen(inptr) + 1;
i++;
}
*num = num_responses;
*response = rarray;
out:
if (retbuf)
dm_free(retbuf);
return status;
}