X-Git-Url: https://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=ccan%2Fiscsi%2Ftools%2Fiscsiclient.c;fp=ccan%2Fiscsi%2Ftools%2Fiscsiclient.c;h=28df8c23b70a42da244beb08db5f05aaa6920d90;hp=0000000000000000000000000000000000000000;hb=cb522f25cada0d3429c69d0fbaa5bd337a422cdd;hpb=0473813acdfad62221ec9f2b9b41bc10d1f4586d diff --git a/ccan/iscsi/tools/iscsiclient.c b/ccan/iscsi/tools/iscsiclient.c new file mode 100644 index 00000000..28df8c23 --- /dev/null +++ b/ccan/iscsi/tools/iscsiclient.c @@ -0,0 +1,430 @@ +/* This is an example of using libiscsi. + * It basically logs in to the the target and performs a discovery. + * It then selects the last target in the returned list and + * starts a normal login to that target. + * Once logged in it issues a REPORTLUNS call and selects the last returned lun in the list. + * This LUN is then used to send INQUIRY, READCAPACITY10 and READ10 test calls to. + */ +/* The reason why we have to specify an allocation length and sometimes probe, starting with a small value, probing how big the buffer + * should be, and asking again with a bigger buffer. + * Why not just always ask with a buffer that is big enough? + * The reason is that a lot of scsi targets are "sensitive" and ""buggy"" + * many targets will just fail the operation completely if they thing alloc len is unreasonably big. + */ + +/* This is the host/port we connect to.*/ +#define TARGET "10.1.1.27:3260" + +#include +#include +#include +#include +#include +#include +#include + +struct client_state { + char *message; + int has_discovered_target; + char *target_name; + char *target_address; + int lun; + int block_size; +}; + +void nop_out_cb(struct iscsi_context *iscsi, int status, void *command_data, void *private_data) +{ + struct client_state *clnt = (struct client_state *)private_data; + struct iscsi_data *data = command_data; + + printf("NOP-IN status:%d\n", status); + if (data->size > 0) { + printf("NOP-IN data:%s\n", data->data); + } + exit(10); +} + + +void write10_cb(struct iscsi_context *iscsi, int status, void *command_data, void *private_data) +{ + struct client_state *clnt = (struct client_state *)private_data; + struct scsi_task *task = command_data; + int i; + + if (status == ISCSI_STATUS_CHECK_CONDITION) { + + printf("Write10 failed with sense key:%d ascq:%04x\n", task->sense.key, task->sense.ascq); + exit(10); + } + + printf("Write successful\n"); + exit(10); +} + + +void read10_cb(struct iscsi_context *iscsi, int status, void *command_data, void *private_data) +{ + struct client_state *clnt = (struct client_state *)private_data; + struct scsi_task *task = command_data; + int i; + + if (status == ISCSI_STATUS_CHECK_CONDITION) { + printf("Read10 failed with sense key:%d ascq:%04x\n", task->sense.key, task->sense.ascq); + exit(10); + } + + printf("READ10 successful. Block content:\n"); + for (i=0;idatain.size;i++) { + printf("%02x ", task->datain.data[i]); + if (i%16==15) + printf("\n"); + if (i==69) + break; + } + printf("...\n"); + + printf("Finished, wont try to write data since that will likely destroy your LUN :-(\n"); + printf("Send NOP-OUT\n"); + if (iscsi_nop_out_async(iscsi, nop_out_cb, "Ping!", 6, private_data) != 0) { + printf("failed to send nop-out\n"); + exit(10); + } +// printf("write the block back\n"); +// if (iscsi_write10_async(iscsi, clnt->lun, write10_cb, task->data.datain, task->datain.size, 0, 0, 0, clnt->block_size, private_data) != 0) { +// printf("failed to send write10 command\n"); +// exit(10); +// } +} + +void readcapacity10_cb(struct iscsi_context *iscsi, int status, void *command_data, void *private_data) +{ + struct client_state *clnt = (struct client_state *)private_data; + struct scsi_task *task = command_data; + struct scsi_readcapacity10 *rc10; + int full_size; + + if (status == ISCSI_STATUS_CHECK_CONDITION) { + printf("Readcapacity10 failed with sense key:%d ascq:%04x\n", task->sense.key, task->sense.ascq); + exit(10); + } + + full_size = scsi_datain_getfullsize(task); + if (full_size < task->datain.size) { + printf("not enough data for full size readcapacity10\n"); + exit(10); + } + + rc10 = scsi_datain_unmarshall(task); + if (rc10 == NULL) { + printf("failed to unmarshall readcapacity10 data\n"); + exit(10); + } + clnt->block_size = rc10->block_size; + printf("READCAPACITY10 successful. Size:%d blocks blocksize:%d. Read first block\n", rc10->lba, rc10->block_size); + free(rc10); + + if (iscsi_read10_async(iscsi, clnt->lun, read10_cb, 0, clnt->block_size, clnt->block_size, private_data) != 0) { + printf("failed to send read10 command\n"); + exit(10); + } +} + +void modesense6_cb(struct iscsi_context *iscsi, int status, void *command_data, void *private_data) +{ + struct client_state *clnt = (struct client_state *)private_data; + struct scsi_task *task = command_data; + int full_size; + + if (status == ISCSI_STATUS_CHECK_CONDITION) { + printf("Modesense6 failed with sense key:%d ascq:%04x\n", task->sense.key, task->sense.ascq); + exit(10); + } + + full_size = scsi_datain_getfullsize(task); + if (full_size > task->datain.size) { + printf("did not get enough data for mode sense, sening modesense again asking for bigger buffer\n"); + if (iscsi_modesense6_async(iscsi, clnt->lun, modesense6_cb, 0, SCSI_MODESENSE_PC_CURRENT, SCSI_MODESENSE_PAGECODE_RETURN_ALL_PAGES, 0, full_size, private_data) != 0) { + printf("failed to send modesense6 command\n"); + exit(10); + } + return; + } + + printf("MODESENSE6 successful.\n"); + printf("Send READCAPACITY10\n"); + if (iscsi_readcapacity10_async(iscsi, clnt->lun, readcapacity10_cb, 0, 0, private_data) != 0) { + printf("failed to send readcapacity command\n"); + exit(10); + } +} + +void inquiry_cb(struct iscsi_context *iscsi, int status, void *command_data, void *private_data) +{ + struct client_state *clnt = (struct client_state *)private_data; + struct scsi_task *task = command_data; + struct scsi_inquiry_standard *inq; + + if (status == ISCSI_STATUS_CHECK_CONDITION) { + printf("Inquiry failed with sense key:%d ascq:%04x\n", task->sense.key, task->sense.ascq); + exit(10); + } + + printf("INQUIRY successful for standard data.\n"); + inq = scsi_datain_unmarshall(task); + if (inq == NULL) { + printf("failed to unmarshall inquiry datain blob\n"); + exit(10); + } + + printf("Device Type is %d. VendorId:%s ProductId:%s\n", inq->periperal_device_type, inq->vendor_identification, inq->product_identification); + printf("Send MODESENSE6\n"); + if (iscsi_modesense6_async(iscsi, clnt->lun, modesense6_cb, 0, SCSI_MODESENSE_PC_CURRENT, SCSI_MODESENSE_PAGECODE_RETURN_ALL_PAGES, 0, 4, private_data) != 0) { + printf("failed to send modesense6 command\n"); + exit(10); + } + +} + +void testunitready_cb(struct iscsi_context *iscsi, int status, void *command_data, void *private_data) +{ + struct client_state *clnt = (struct client_state *)private_data; + struct scsi_task *task = command_data; + + if (status == ISCSI_STATUS_CHECK_CONDITION) { + printf("First testunitready failed with sense key:%d ascq:%04x\n", task->sense.key, task->sense.ascq); + if (task->sense.key == SCSI_SENSE_KEY_UNIT_ATTENTION && task->sense.ascq == SCSI_SENSE_ASCQ_BUS_RESET) { + printf("target device just came online, try again\n"); + + if (iscsi_testunitready_async(iscsi, clnt->lun, testunitready_cb, private_data) != 0) { + printf("failed to send testunitready command\n"); + exit(10); + } + } + return; + } + + printf("TESTUNITREADY successful, do an inquiry on lun:%d\n", clnt->lun); + if (iscsi_inquiry_async(iscsi, clnt->lun, inquiry_cb, 0, 0, 64, private_data) != 0) { + printf("failed to send inquiry command\n"); + exit(10); + } +} + + +void reportluns_cb(struct iscsi_context *iscsi, int status, void *command_data, void *private_data) +{ + struct client_state *clnt = (struct client_state *)private_data; + struct scsi_task *task = command_data; + struct scsi_reportluns_list *list; + uint32_t full_report_size; + int i; + + if (status != ISCSI_STATUS_GOOD) { + printf("Reportluns failed with unknown status code :%d\n", status); + return; + } + + full_report_size = scsi_datain_getfullsize(task); + + printf("REPORTLUNS status:%d data size:%d, full reports luns data size:%d\n", status, task->datain.size, full_report_size); + if (full_report_size > task->datain.size) { + printf("We did not get all the data we need in reportluns, ask again\n"); + if (iscsi_reportluns_async(iscsi, reportluns_cb, 0, full_report_size, private_data) != 0) { + printf("failed to send reportluns command\n"); + exit(10); + } + return; + } + + + list = scsi_datain_unmarshall(task); + if (list == NULL) { + printf("failed to unmarshall reportluns datain blob\n"); + exit(10); + } + for (i=0; i < list->num; i++) { + printf("LUN:%d found\n", list->luns[i]); + clnt->lun = list->luns[i]; + } + + printf("Will use LUN:%d\n", clnt->lun); + printf("Send testunitready to lun %d\n", clnt->lun); + if (iscsi_testunitready_async(iscsi, clnt->lun, testunitready_cb, private_data) != 0) { + printf("failed to send testunitready command\n"); + exit(10); + } +} + + +void normallogin_cb(struct iscsi_context *iscsi, int status, void *command_data, void *private_data) +{ + if (status != 0) { + printf("Failed to log in to target. status :0x%04x\n", status); + exit(10); + } + + printf("Logged in normal session, send reportluns\n"); + if (iscsi_reportluns_async(iscsi, reportluns_cb, 0, 16, private_data) != 0) { + printf("failed to send reportluns command\n"); + exit(10); + } +} + + +void normalconnect_cb(struct iscsi_context *iscsi, int status, void *command_data, void *private_data) +{ + printf("Connected to iscsi socket\n"); + + if (status != 0) { + printf("normalconnect_cb: connection failed status:%d\n", status); + exit(10); + } + + printf("connected, send login command\n"); + iscsi_set_session_type(iscsi, ISCSI_SESSION_NORMAL); + if (iscsi_login_async(iscsi, normallogin_cb, private_data) != 0) { + printf("iscsi_login_async failed\n"); + exit(10); + } +} + + + +void discoverylogout_cb(struct iscsi_context *iscsi, int status, void *command_data, void *private_data) +{ + struct client_state *clnt = (struct client_state *)private_data; + + printf("discovery session logged out, Message from main() was:[%s]\n", clnt->message); + + printf("disconnect socket\n"); + if (iscsi_disconnect(iscsi) != 0) { + printf("Failed to disconnect old socket\n"); + exit(10); + } + + printf("reconnect with normal login to [%s]\n", clnt->target_address); + printf("Use targetname [%s] when connecting\n", clnt->target_name); + if (iscsi_set_targetname(iscsi, clnt->target_name)) { + printf("Failed to set target name\n"); + exit(10); + } + if (iscsi_set_alias(iscsi, "ronnie") != 0) { + printf("Failed to add alias\n"); + exit(10); + } + if (iscsi_set_session_type(iscsi, ISCSI_SESSION_NORMAL) != 0) { + printf("Failed to set settion type to normal\n"); + exit(10); + } + + if (iscsi_connect_async(iscsi, clnt->target_address, normalconnect_cb, clnt) != 0) { + printf("iscsi_connect failed\n"); + exit(10); + } +} + +void discovery_cb(struct iscsi_context *iscsi, int status, void *command_data, void *private_data) +{ + struct client_state *clnt = (struct client_state *)private_data; + struct iscsi_discovery_address *addr; + + printf("discovery callback status:%04x\n", status); + for(addr=command_data; addr; addr=addr->next) { + printf("Target:%s Address:%s\n", addr->target_name, addr->target_address); + } + + addr=command_data; + clnt->has_discovered_target = 1; + clnt->target_name = strdup(addr->target_name); + clnt->target_address = strdup(addr->target_address); + + + printf("discovery complete, send logout command\n"); + + if (iscsi_logout_async(iscsi, discoverylogout_cb, private_data) != 0) { + printf("iscsi_logout_async failed\n"); + exit(10); + } +} + + +void discoverylogin_cb(struct iscsi_context *iscsi, int status, void *command_data, void *private_data) +{ + if (status != 0) { + printf("Failed to log in to target. status :0x%04x\n", status); + exit(10); + } + + printf("Logged in to target, send discovery command\n"); + if (iscsi_discovery_async(iscsi, discovery_cb, private_data) != 0) { + printf("failed to send discovery command\n"); + exit(10); + } + +} + +void discoveryconnect_cb(struct iscsi_context *iscsi, int status, void *command_data, void *private_data) +{ + printf("Connected to iscsi socket status:0x%08x\n", status); + + if (status != 0) { + printf("discoveryconnect_cb: connection failed status:%d\n", status); + exit(10); + } + + printf("connected, send login command\n"); + iscsi_set_session_type(iscsi, ISCSI_SESSION_DISCOVERY); + if (iscsi_login_async(iscsi, discoverylogin_cb, private_data) != 0) { + printf("iscsi_login_async failed\n"); + exit(10); + } +} + + +int main(int argc, char *argv[]) +{ + struct iscsi_context *iscsi; + struct pollfd pfd; + struct client_state clnt; + + printf("iscsi client\n"); + + iscsi = iscsi_create_context("iqn.2002-10.com.ronnie:client"); + if (iscsi == NULL) { + printf("Failed to create context\n"); + exit(10); + } + + if (iscsi_set_alias(iscsi, "ronnie") != 0) { + printf("Failed to add alias\n"); + exit(10); + } + + clnt.message = "Hello iSCSI"; + clnt.has_discovered_target = 0; + if (iscsi_connect_async(iscsi, TARGET, discoveryconnect_cb, &clnt) != 0) { + printf("iscsi_connect failed\n"); + exit(10); + } + + for (;;) { + pfd.fd = iscsi_get_fd(iscsi); + pfd.events = iscsi_which_events(iscsi); + + if (poll(&pfd, 1, -1) < 0) { + printf("Poll failed"); + exit(10); + } + if (iscsi_service(iscsi, pfd.revents) < 0) { + printf("iscsi_service failed\n"); + break; + } + } + +printf("STOP\n"); +exit(10); + + printf("ok\n"); + return 0; +} +