diff options
| author | Nicholas Bellinger <nab@linux-iscsi.org> | 2013-06-20 09:45:42 +0400 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2013-07-04 06:43:24 +0400 |
| commit | 6665889c843c774cd35309cf995ba0d302fa6dba (patch) | |
| tree | ad5aeffb0ab8cbacdcd0dc50ed70fd9cad28d825 /drivers/target | |
| parent | 9864ca9d27f75d2716d09dd02b3d62d241194576 (diff) | |
| download | linux-6665889c843c774cd35309cf995ba0d302fa6dba.tar.xz | |
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>
Diffstat (limited to 'drivers/target')
| -rw-r--r-- | drivers/target/iscsi/iscsi_target.c | 28 | ||||
| -rw-r--r-- | drivers/target/iscsi/iscsi_target_core.h | 1 |
2 files changed, 29 insertions, 0 deletions
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c index 30ca1887516b..f2c3d4abfe70 100644 --- a/drivers/target/iscsi/iscsi_target.c +++ b/drivers/target/iscsi/iscsi_target.c @@ -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); diff --git a/drivers/target/iscsi/iscsi_target_core.h b/drivers/target/iscsi/iscsi_target_core.h index ad46e73dab4c..3436a2cc1d35 100644 --- a/drivers/target/iscsi/iscsi_target_core.h +++ b/drivers/target/iscsi/iscsi_target_core.h @@ -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 */ |