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| author | Vikas Chaudhary <vikas.chaudhary@qlogic.com> | 2012-02-13 18:30:46 +0530 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2012-02-19 09:33:32 -0600 |
| commit | a11e25459558421ec5c4adc3fc46fe320ab74bd3 (patch) | |
| tree | f1112f31c65b28337b9b25082a1c5a8246ceb1ad | |
| parent | 46801ba698b3366cf8d293d9f3d4253b6fd5210b (diff) | |
| download | linux-a11e25459558421ec5c4adc3fc46fe320ab74bd3.tar.gz linux-a11e25459558421ec5c4adc3fc46fe320ab74bd3.tar.bz2 linux-a11e25459558421ec5c4adc3fc46fe320ab74bd3.zip | |
[SCSI] scsi_transport_iscsi: added support for host event
Added support to post kernel host event to application using
netlink interface.
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>
| -rw-r--r-- | drivers/scsi/scsi_transport_iscsi.c | 31 | ||||
| -rw-r--r-- | include/scsi/iscsi_if.h | 13 | ||||
| -rw-r--r-- | include/scsi/scsi_transport_iscsi.h | 6 |
3 files changed, 50 insertions, 0 deletions
diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c index 787044828a70..38f0bf8ea91a 100644 --- a/drivers/scsi/scsi_transport_iscsi.c +++ b/drivers/scsi/scsi_transport_iscsi.c @@ -1476,6 +1476,37 @@ void iscsi_conn_login_event(struct iscsi_cls_conn *conn, } EXPORT_SYMBOL_GPL(iscsi_conn_login_event); +void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport, + enum iscsi_host_event_code code, uint32_t data_size, + uint8_t *data) +{ + struct nlmsghdr *nlh; + struct sk_buff *skb; + struct iscsi_uevent *ev; + int len = NLMSG_SPACE(sizeof(*ev) + data_size); + + skb = alloc_skb(len, GFP_KERNEL); + if (!skb) { + printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n", + host_no, code); + return; + } + + nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); + ev = NLMSG_DATA(nlh); + ev->transport_handle = iscsi_handle(transport); + ev->type = ISCSI_KEVENT_HOST_EVENT; + ev->r.host_event.host_no = host_no; + ev->r.host_event.code = code; + ev->r.host_event.data_size = data_size; + + if (data_size) + memcpy((char *)ev + sizeof(*ev), data, data_size); + + iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL); +} +EXPORT_SYMBOL_GPL(iscsi_post_host_event); + static int iscsi_if_send_reply(uint32_t group, int seq, int type, int done, int multi, void *payload, int size) diff --git a/include/scsi/iscsi_if.h b/include/scsi/iscsi_if.h index e49b7c8dd217..3aac99155e80 100644 --- a/include/scsi/iscsi_if.h +++ b/include/scsi/iscsi_if.h @@ -72,6 +72,7 @@ enum iscsi_uevent_e { ISCSI_KEVENT_PATH_REQ = KEVENT_BASE + 7, ISCSI_KEVENT_IF_DOWN = KEVENT_BASE + 8, ISCSI_KEVENT_CONN_LOGIN_STATE = KEVENT_BASE + 9, + ISCSI_KEVENT_HOST_EVENT = KEVENT_BASE + 10, }; enum iscsi_tgt_dscvr { @@ -80,6 +81,13 @@ enum iscsi_tgt_dscvr { ISCSI_TGT_DSCVR_SLP = 3, }; +enum iscsi_host_event_code { + ISCSI_EVENT_LINKUP = 1, + ISCSI_EVENT_LINKDOWN, + /* must always be last */ + ISCSI_EVENT_MAX, +}; + struct iscsi_uevent { uint32_t type; /* k/u events type */ uint32_t iferror; /* carries interface or resource errors */ @@ -222,6 +230,11 @@ struct iscsi_uevent { struct msg_notify_if_down { uint32_t host_no; } notify_if_down; + struct msg_host_event { + uint32_t host_no; + uint32_t data_size; + enum iscsi_host_event_code code; + } host_event; } r; } __attribute__ ((aligned (sizeof(uint64_t)))); diff --git a/include/scsi/scsi_transport_iscsi.h b/include/scsi/scsi_transport_iscsi.h index fa7ca4e16020..7f047314281b 100644 --- a/include/scsi/scsi_transport_iscsi.h +++ b/include/scsi/scsi_transport_iscsi.h @@ -166,6 +166,12 @@ extern int iscsi_offload_mesg(struct Scsi_Host *shost, struct iscsi_transport *transport, uint32_t type, char *data, uint16_t data_size); +extern void iscsi_post_host_event(uint32_t host_no, + struct iscsi_transport *transport, + enum iscsi_host_event_code code, + uint32_t data_size, + uint8_t *data); + struct iscsi_cls_conn { struct list_head conn_list; /* item in connlist */ void *dd_data; /* LLD private data */ |