iscsi-target: Add IFC_SENDTARGETS_SINGLE support
This patch changes ISCSI_OP_TEXT handling of SendTargets=[iqn.,eui.] payloads to return explicit discovery information. It adds checks to iscsit_process_text_cmd() and adds the special single $TARGETNAME discovery case in iscsit_build_sendtargets_response() code. Cc: Or Gerlitz <ogerlitz@mellanox.com> Cc: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
parent
9864ca9d27
commit
6665889c84
|
@ -2016,6 +2016,9 @@ iscsit_process_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
|
|||
}
|
||||
if (!strncmp("=All", text_ptr, 4)) {
|
||||
cmd->cmd_flags |= IFC_SENDTARGETS_ALL;
|
||||
} else if (!strncmp("=iqn.", text_ptr, 5) ||
|
||||
!strncmp("=eui.", text_ptr, 5)) {
|
||||
cmd->cmd_flags |= IFC_SENDTARGETS_SINGLE;
|
||||
} else {
|
||||
pr_err("Unable to locate valid SendTargets=%s value\n", text_ptr);
|
||||
goto reject;
|
||||
|
@ -3398,6 +3401,7 @@ static int iscsit_build_sendtargets_response(struct iscsi_cmd *cmd)
|
|||
struct iscsi_tpg_np *tpg_np;
|
||||
int buffer_len, end_of_buf = 0, len = 0, payload_len = 0;
|
||||
unsigned char buf[ISCSI_IQN_LEN+12]; /* iqn + "TargetName=" + \0 */
|
||||
unsigned char *text_in = cmd->text_in_ptr, *text_ptr = NULL;
|
||||
|
||||
buffer_len = max(conn->conn_ops->MaxRecvDataSegmentLength,
|
||||
SENDTARGETS_BUF_LIMIT);
|
||||
|
@ -3408,9 +3412,30 @@ static int iscsit_build_sendtargets_response(struct iscsi_cmd *cmd)
|
|||
" response.\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
/*
|
||||
* Locate pointer to iqn./eui. string for IFC_SENDTARGETS_SINGLE
|
||||
* explicit case..
|
||||
*/
|
||||
if (cmd->cmd_flags & IFC_SENDTARGETS_SINGLE) {
|
||||
text_ptr = strchr(text_in, '=');
|
||||
if (!text_ptr) {
|
||||
pr_err("Unable to locate '=' string in text_in:"
|
||||
" %s\n", text_in);
|
||||
return -EINVAL;
|
||||
}
|
||||
/*
|
||||
* Skip over '=' character..
|
||||
*/
|
||||
text_ptr += 1;
|
||||
}
|
||||
|
||||
spin_lock(&tiqn_lock);
|
||||
list_for_each_entry(tiqn, &g_tiqn_list, tiqn_list) {
|
||||
if ((cmd->cmd_flags & IFC_SENDTARGETS_SINGLE) &&
|
||||
strcmp(tiqn->tiqn, text_ptr)) {
|
||||
continue;
|
||||
}
|
||||
|
||||
len = sprintf(buf, "TargetName=%s", tiqn->tiqn);
|
||||
len += 1;
|
||||
|
||||
|
@ -3464,6 +3489,9 @@ static int iscsit_build_sendtargets_response(struct iscsi_cmd *cmd)
|
|||
eob:
|
||||
if (end_of_buf)
|
||||
break;
|
||||
|
||||
if (cmd->cmd_flags & IFC_SENDTARGETS_SINGLE)
|
||||
break;
|
||||
}
|
||||
spin_unlock(&tiqn_lock);
|
||||
|
||||
|
|
|
@ -134,6 +134,7 @@ enum cmd_flags_table {
|
|||
ICF_OOO_CMDSN = 0x00000080,
|
||||
ICF_REJECT_FAIL_CONN = 0x00000100,
|
||||
IFC_SENDTARGETS_ALL = 0x00000200,
|
||||
IFC_SENDTARGETS_SINGLE = 0x00000400,
|
||||
};
|
||||
|
||||
/* struct iscsi_cmd->i_state */
|
||||
|
|
Loading…
Reference in a new issue