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iscsi-target: Move sendtargets parsing into iscsit_process_text_cmd

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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>
This commit is contained in:
Nicholas Bellinger 2013-06-19 22:43:11 -07:00
parent dbf738a1a6
commit 9864ca9d27
3 changed files with 35 additions and 20 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

51
drivers/target/iscsi/iscsi_target.c
View file

@ -1995,8 +1995,32 @@ int
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 @@ iscsit_process_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
}
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 @@ iscsit_handle_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
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 @@ iscsit_handle_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
" 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 @@ iscsit_handle_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
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);
}

3
drivers/target/iscsi/iscsi_target_core.h
View file

@ -133,6 +133,7 @@ enum cmd_flags_table {
ICF_ATTACHED_TO_RQUEUE = 0x00000040,
ICF_OOO_CMDSN = 0x00000080,
ICF_REJECT_FAIL_CONN = 0x00000100,
IFC_SENDTARGETS_ALL = 0x00000200,
};
/* struct iscsi_cmd->i_state */
@ -427,6 +428,8 @@ struct iscsi_cmd {
u32 tx_size;
/* Buffer used for various purposes */
void *buf_ptr;
/* Used by SendTargets=[iqn.,eui.] discovery */
void *text_in_ptr;
/* See include/linux/dma-mapping.h */
enum dma_data_direction data_direction;
/* iSCSI PDU Header + CRC */

1
drivers/target/iscsi/iscsi_target_util.c
View file

@ -681,6 +681,7 @@ void iscsit_release_cmd(struct iscsi_cmd *cmd)
kfree(cmd->seq_list);
kfree(cmd->tmr_req);
kfree(cmd->iov_data);
kfree(cmd->text_in_ptr);
kmem_cache_free(lio_cmd_cache, cmd);
}