iscsi-target: Move sendtargets parsing into iscsit_process_text_cmd
This patch moves ISCSI_OP_TEXT PDU buffer sanity checks to
iscsit_process_text_cmd() code, so that it can be shared
with iser-target code.
It adds IFC_SENDTARGETS_ALL + iscsi_cmd->text_in_ptr in order
to save text payload for ISCSI_OP_TEXT_RSP, and updates
iscsit_release_cmd() to assigned memory.
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Cc: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index 1f79a16..30ca188 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -1995,8 +1995,32 @@
iscsit_process_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
struct iscsi_text *hdr)
{
+ unsigned char *text_in = cmd->text_in_ptr, *text_ptr;
int cmdsn_ret;
+ if (!text_in) {
+ pr_err("Unable to locate text_in buffer for sendtargets"
+ " discovery\n");
+ goto reject;
+ }
+ if (strncmp("SendTargets", text_in, 11) != 0) {
+ pr_err("Received Text Data that is not"
+ " SendTargets, cannot continue.\n");
+ goto reject;
+ }
+ text_ptr = strchr(text_in, '=');
+ if (!text_ptr) {
+ pr_err("No \"=\" separator found in Text Data,"
+ " cannot continue.\n");
+ goto reject;
+ }
+ if (!strncmp("=All", text_ptr, 4)) {
+ cmd->cmd_flags |= IFC_SENDTARGETS_ALL;
+ } else {
+ pr_err("Unable to locate valid SendTargets=%s value\n", text_ptr);
+ goto reject;
+ }
+
spin_lock_bh(&conn->cmd_lock);
list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list);
spin_unlock_bh(&conn->cmd_lock);
@@ -2013,6 +2037,10 @@
}
return iscsit_execute_cmd(cmd, 0);
+
+reject:
+ return iscsit_add_reject_from_cmd(ISCSI_REASON_PROTOCOL_ERROR,
+ 0, 0, (unsigned char *)hdr, cmd);
}
EXPORT_SYMBOL(iscsit_process_text_cmd);
@@ -2031,7 +2059,6 @@
rx_size = payload_length;
if (payload_length) {
- char *text_ptr;
u32 checksum = 0, data_crc = 0;
u32 padding = 0, pad_bytes = 0;
int niov = 0, rx_got;
@@ -2043,6 +2070,7 @@
" incoming text parameters\n");
goto reject;
}
+ cmd->text_in_ptr = text_in;
memset(iov, 0, 3 * sizeof(struct kvec));
iov[niov].iov_base = text_in;
@@ -2101,30 +2129,13 @@
text_in[payload_length - 1] = '\0';
pr_debug("Successfully read %d bytes of text"
" data.\n", payload_length);
-
- if (strncmp("SendTargets", text_in, 11) != 0) {
- pr_err("Received Text Data that is not"
- " SendTargets, cannot continue.\n");
- goto reject;
- }
- text_ptr = strchr(text_in, '=');
- if (!text_ptr) {
- pr_err("No \"=\" separator found in Text Data,"
- " cannot continue.\n");
- goto reject;
- }
- if (strncmp("=All", text_ptr, 4) != 0) {
- pr_err("Unable to locate All value for"
- " SendTargets key, cannot continue.\n");
- goto reject;
- }
- kfree(text_in);
}
return iscsit_process_text_cmd(conn, cmd, hdr);
reject:
- kfree(text_in);
+ kfree(cmd->text_in_ptr);
+ cmd->text_in_ptr = NULL;
return iscsit_add_reject_from_cmd(ISCSI_REASON_PROTOCOL_ERROR,
0, 0, buf, cmd);
}