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Initial import of libiscsi

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This commit is contained in:
Ronnie Sahlberg
2010-12-05 08:24:57 +11:00
commit 098bc5a9a7
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lib/sync.c Normal file
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/*
Copyright (C) 2010 by Ronnie Sahlberg <ronniesahlberg@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <poll.h>
#include "iscsi.h"
#include "iscsi-private.h"
#include "scsi-lowlevel.h"
struct scsi_sync_state {
int finished;
struct scsi_task *task;
};
struct iscsi_sync_state {
int finished;
int status;
};
static void
event_loop(struct iscsi_context *iscsi, struct scsi_sync_state *state)
{
struct pollfd pfd;
while (state->finished == 0) {
pfd.fd = iscsi_get_fd(iscsi);
pfd.events = iscsi_which_events(iscsi);
if (poll(&pfd, 1, -1) < 0) {
iscsi_set_error(iscsi, "Poll failed");
return;
}
if (iscsi_service(iscsi, pfd.revents) < 0) {
iscsi_set_error(iscsi,
"iscsi_service failed with : %s",
iscsi_get_error(iscsi));
return;
}
}
}
/*
* Synchronous iSCSI commands
*/
static void
iscsi_sync_cb(struct iscsi_context *iscsi _U_, int status,
void *command_data _U_, void *private_data)
{
struct iscsi_sync_state *state = private_data;
state->status = status;
state->finished = 1;
}
int
iscsi_connect_sync(struct iscsi_context *iscsi, const char *portal)
{
struct iscsi_sync_state state;
bzero(&state, sizeof(state));
if (iscsi_connect_async(iscsi, portal,
iscsi_sync_cb, &state) != 0) {
iscsi_set_error(iscsi,
"Failed to start connect() %s",
iscsi_get_error(iscsi));
return -1;
}
event_loop(iscsi, (struct scsi_sync_state *)&state);
return state.status;
}
int
iscsi_full_connect_sync(struct iscsi_context *iscsi,
const char *portal, int lun)
{
struct iscsi_sync_state state;
bzero(&state, sizeof(state));
if (iscsi_full_connect_async(iscsi, portal, lun,
iscsi_sync_cb, &state) != 0) {
iscsi_set_error(iscsi,
"Failed to start full connect %s",
iscsi_get_error(iscsi));
return -1;
}
event_loop(iscsi, (struct scsi_sync_state *)&state);
return state.status;
}
int iscsi_login_sync(struct iscsi_context *iscsi)
{
struct iscsi_sync_state state;
bzero(&state, sizeof(state));
if (iscsi_login_async(iscsi, iscsi_sync_cb, &state) != 0) {
iscsi_set_error(iscsi, "Failed to login. %s",
iscsi_get_error(iscsi));
return -1;
}
event_loop(iscsi, (struct scsi_sync_state *)&state);
return state.status;
}
int iscsi_logout_sync(struct iscsi_context *iscsi)
{
struct iscsi_sync_state state;
bzero(&state, sizeof(state));
if (iscsi_logout_async(iscsi, iscsi_sync_cb, &state) != 0) {
iscsi_set_error(iscsi, "Failed to start logout() %s",
iscsi_get_error(iscsi));
return -1;
}
event_loop(iscsi, (struct scsi_sync_state *)&state);
return state.status;
}
/*
* Synchronous SCSI commands
*/
static void
scsi_sync_cb(struct iscsi_context *iscsi _U_, int status, void *command_data,
void *private_data)
{
struct scsi_task *task = command_data;
struct scsi_sync_state *state = private_data;
task->status = status;
state->finished = 1;
state->task = task;
iscsi_cbdata_steal_scsi_task(task);
}
struct scsi_task *
iscsi_reportluns_sync(struct iscsi_context *iscsi, int report_type,
int alloc_len)
{
struct scsi_sync_state state;
bzero(&state, sizeof(state));
if (iscsi_reportluns_async(iscsi, report_type, alloc_len,
scsi_sync_cb, &state) != 0) {
iscsi_set_error(iscsi, "Failed to send ReportLuns command");
return NULL;
}
event_loop(iscsi, &state);
return state.task;
}
struct scsi_task *
iscsi_testunitready_sync(struct iscsi_context *iscsi, int lun)
{
struct scsi_sync_state state;
bzero(&state, sizeof(state));
if (iscsi_testunitready_async(iscsi, lun,
scsi_sync_cb, &state) != 0) {
iscsi_set_error(iscsi,
"Failed to send TestUnitReady command");
return NULL;
}
event_loop(iscsi, &state);
return state.task;
}
struct scsi_task *
iscsi_inquiry_sync(struct iscsi_context *iscsi, int lun, int evpd,
int page_code, int maxsize)
{
struct scsi_sync_state state;
bzero(&state, sizeof(state));
if (iscsi_inquiry_async(iscsi, lun, evpd, page_code, maxsize,
scsi_sync_cb, &state) != 0) {
iscsi_set_error(iscsi, "Failed to send Inquiry command");
return NULL;
}
event_loop(iscsi, &state);
return state.task;
}
struct scsi_task *
iscsi_readcapacity10_sync(struct iscsi_context *iscsi, int lun, int lba,
int pmi)
{
struct scsi_sync_state state;
bzero(&state, sizeof(state));
if (iscsi_readcapacity10_async(iscsi, lun, lba, pmi,
scsi_sync_cb, &state) != 0) {
iscsi_set_error(iscsi,
"Failed to send ReadCapacity10 command");
return NULL;
}
event_loop(iscsi, &state);
return state.task;
}
struct scsi_task *
iscsi_synchronizecache10_sync(struct iscsi_context *iscsi, int lun, int lba,
int num_blocks, int syncnv, int immed)
{
struct scsi_sync_state state;
bzero(&state, sizeof(state));
if (iscsi_synchronizecache10_async(iscsi, lun, lba, num_blocks,
syncnv, immed,
scsi_sync_cb, &state) != 0) {
iscsi_set_error(iscsi,
"Failed to send SynchronizeCache10 command");
return NULL;
}
event_loop(iscsi, &state);
return state.task;
}
struct scsi_task *
iscsi_scsi_command_sync(struct iscsi_context *iscsi, int lun,
struct scsi_task *task, struct iscsi_data *data)
{
struct scsi_sync_state state;
bzero(&state, sizeof(state));
if (iscsi_scsi_command_async(iscsi, lun, task,
scsi_sync_cb, data, &state) != 0) {
iscsi_set_error(iscsi, "Failed to send SCSI command");
return NULL;
}
event_loop(iscsi, &state);
return state.task;
}