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[SCSI] scsi_transport_iscsi: Add host statistics support 

Add transport_iscsi hooks to get aggregate host statistics.
The statistics include MAC, TCP/IP & iSCSI statistics.

Signed-off-by: Lalit Chandivade <lalit.chandivade@qlogic.com>
Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
wifi-calibration
Lalit Chandivade 2013-11-22 05:28:18 -05:00 committed by James Bottomley
parent df86f77157
commit 6fa7c55438
3 changed files with 183 additions and 0 deletions
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70
drivers/scsi/scsi_transport_iscsi.c
View File

@ -3415,6 +3415,73 @@ exit_logout_sid:
return err;
}
static int
iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
{
struct iscsi_uevent *ev = nlmsg_data(nlh);
struct Scsi_Host *shost = NULL;
struct iscsi_internal *priv;
struct sk_buff *skbhost_stats;
struct nlmsghdr *nlhhost_stats;
struct iscsi_uevent *evhost_stats;
int host_stats_size = 0;
int len, err = 0;
char *buf;
if (!transport->get_host_stats)
return -EINVAL;
priv = iscsi_if_transport_lookup(transport);
if (!priv)
return -EINVAL;
host_stats_size = sizeof(struct iscsi_offload_host_stats);
len = nlmsg_total_size(sizeof(*ev) + host_stats_size);
shost = scsi_host_lookup(ev->u.get_host_stats.host_no);
if (!shost) {
pr_err("%s: failed. Cound not find host no %u\n",
__func__, ev->u.get_host_stats.host_no);
return -ENODEV;
}
do {
int actual_size;
skbhost_stats = alloc_skb(len, GFP_KERNEL);
if (!skbhost_stats) {
pr_err("cannot deliver host stats: OOM\n");
err = -ENOMEM;
goto exit_host_stats;
}
nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0,
(len - sizeof(*nlhhost_stats)), 0);
evhost_stats = nlmsg_data(nlhhost_stats);
memset(evhost_stats, 0, sizeof(*evhost_stats));
evhost_stats->transport_handle = iscsi_handle(transport);
evhost_stats->type = nlh->nlmsg_type;
evhost_stats->u.get_host_stats.host_no =
ev->u.get_host_stats.host_no;
buf = (char *)((char *)evhost_stats + sizeof(*evhost_stats));
memset(buf, 0, host_stats_size);
err = transport->get_host_stats(shost, buf, host_stats_size);
actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size);
skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size));
nlhhost_stats->nlmsg_len = actual_size;
err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID,
GFP_KERNEL);
} while (err < 0 && err != -ECONNREFUSED);
exit_host_stats:
scsi_host_put(shost);
return err;
}
static int
iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
{
@ -3594,6 +3661,9 @@ iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
err = iscsi_set_chap(transport, ev,
nlmsg_attrlen(nlh, sizeof(*ev)));
break;
case ISCSI_UEVENT_GET_HOST_STATS:
err = iscsi_get_host_stats(transport, nlh);
break;
default:
err = -ENOSYS;
break;

112
include/scsi/iscsi_if.h
View File

@ -70,6 +70,7 @@ enum iscsi_uevent_e {
ISCSI_UEVENT_LOGOUT_FLASHNODE = UEVENT_BASE + 29,
ISCSI_UEVENT_LOGOUT_FLASHNODE_SID = UEVENT_BASE + 30,
ISCSI_UEVENT_SET_CHAP = UEVENT_BASE + 31,
ISCSI_UEVENT_GET_HOST_STATS = UEVENT_BASE + 32,
/* up events */
ISCSI_KEVENT_RECV_PDU = KEVENT_BASE + 1,
@ -242,6 +243,9 @@ struct iscsi_uevent {
uint32_t host_no;
uint32_t sid;
} logout_flashnode_sid;
struct msg_get_host_stats {
uint32_t host_no;
} get_host_stats;
} u;
union {
/* messages k -> u */
@ -845,4 +849,112 @@ struct iscsi_chap_rec {
uint8_t password_length;
};
#define ISCSI_HOST_STATS_CUSTOM_MAX 32
#define ISCSI_HOST_STATS_CUSTOM_DESC_MAX 64
struct iscsi_host_stats_custom {
char desc[ISCSI_HOST_STATS_CUSTOM_DESC_MAX];
uint64_t value;
};
/* struct iscsi_offload_host_stats: Host statistics,
* Include statistics for MAC, IP, TCP & iSCSI.
*/
struct iscsi_offload_host_stats {
/* MAC */
uint64_t mactx_frames;
uint64_t mactx_bytes;
uint64_t mactx_multicast_frames;
uint64_t mactx_broadcast_frames;
uint64_t mactx_pause_frames;
uint64_t mactx_control_frames;
uint64_t mactx_deferral;
uint64_t mactx_excess_deferral;
uint64_t mactx_late_collision;
uint64_t mactx_abort;
uint64_t mactx_single_collision;
uint64_t mactx_multiple_collision;
uint64_t mactx_collision;
uint64_t mactx_frames_dropped;
uint64_t mactx_jumbo_frames;
uint64_t macrx_frames;
uint64_t macrx_bytes;
uint64_t macrx_unknown_control_frames;
uint64_t macrx_pause_frames;
uint64_t macrx_control_frames;
uint64_t macrx_dribble;
uint64_t macrx_frame_length_error;
uint64_t macrx_jabber;
uint64_t macrx_carrier_sense_error;
uint64_t macrx_frame_discarded;
uint64_t macrx_frames_dropped;
uint64_t mac_crc_error;
uint64_t mac_encoding_error;
uint64_t macrx_length_error_large;
uint64_t macrx_length_error_small;
uint64_t macrx_multicast_frames;
uint64_t macrx_broadcast_frames;
/* IP */
uint64_t iptx_packets;
uint64_t iptx_bytes;
uint64_t iptx_fragments;
uint64_t iprx_packets;
uint64_t iprx_bytes;
uint64_t iprx_fragments;
uint64_t ip_datagram_reassembly;
uint64_t ip_invalid_address_error;
uint64_t ip_error_packets;
uint64_t ip_fragrx_overlap;
uint64_t ip_fragrx_outoforder;
uint64_t ip_datagram_reassembly_timeout;
uint64_t ipv6tx_packets;
uint64_t ipv6tx_bytes;
uint64_t ipv6tx_fragments;
uint64_t ipv6rx_packets;
uint64_t ipv6rx_bytes;
uint64_t ipv6rx_fragments;
uint64_t ipv6_datagram_reassembly;
uint64_t ipv6_invalid_address_error;
uint64_t ipv6_error_packets;
uint64_t ipv6_fragrx_overlap;
uint64_t ipv6_fragrx_outoforder;
uint64_t ipv6_datagram_reassembly_timeout;
/* TCP */
uint64_t tcptx_segments;
uint64_t tcptx_bytes;
uint64_t tcprx_segments;
uint64_t tcprx_byte;
uint64_t tcp_duplicate_ack_retx;
uint64_t tcp_retx_timer_expired;
uint64_t tcprx_duplicate_ack;
uint64_t tcprx_pure_ackr;
uint64_t tcptx_delayed_ack;
uint64_t tcptx_pure_ack;
uint64_t tcprx_segment_error;
uint64_t tcprx_segment_outoforder;
uint64_t tcprx_window_probe;
uint64_t tcprx_window_update;
uint64_t tcptx_window_probe_persist;
/* ECC */
uint64_t ecc_error_correction;
/* iSCSI */
uint64_t iscsi_pdu_tx;
uint64_t iscsi_data_bytes_tx;
uint64_t iscsi_pdu_rx;
uint64_t iscsi_data_bytes_rx;
uint64_t iscsi_io_completed;
uint64_t iscsi_unexpected_io_rx;
uint64_t iscsi_format_error;
uint64_t iscsi_hdr_digest_error;
uint64_t iscsi_data_digest_error;
uint64_t iscsi_sequence_error;
/*
* iSCSI Custom Host Statistics support, i.e. Transport could
* extend existing host statistics with its own specific statistics
* up to ISCSI_HOST_STATS_CUSTOM_MAX
*/
uint32_t custom_length;
struct iscsi_host_stats_custom custom[0]
__aligned(sizeof(uint64_t));
};
#endif

1
include/scsi/scsi_transport_iscsi.h
View File

@ -166,6 +166,7 @@ struct iscsi_transport {
int (*logout_flashnode) (struct iscsi_bus_flash_session *fnode_sess,
struct iscsi_bus_flash_conn *fnode_conn);
int (*logout_flashnode_sid) (struct iscsi_cls_session *cls_sess);
int (*get_host_stats) (struct Scsi_Host *shost, char *buf, int len);
};
/*