[SCSI] FC Transport support for vports based on NPIV
This patch provides support for FC virtual ports based on NPIV.
For information on the interfaces and design, please read the
Documentation/scsi/scsi_fc_transport.txt file enclosed within
the patch.
The RFC was originally posted here:
http://marc.info/?l=linux-scsi&m=117226959918393&w=2
Changes from the initial RFC:
- Bug fix: needed a transport_class_unregister() for the vport class
- Create a symlink to the vport in the shost device if it is not the
parent of the vport.
- Made symbolic name writable so it can be set after creation
- Made the temporary fc_vport_identifiers struct private to the
transport.
- Deleted the vport_id field from the vport. I couldn't find any good
use for it (and symname is a good replacement).
- Made the vport_state and vport_last_state "private" attributes.
Added the fc_vport_set_state() helper function to manage state
transitions
- Updated vport_create() to allow a vport to be created in a disabled
state.
- Added INITIALIZING and FAILED vport states
- Added VPCERR_xxx defines for errors to be returned from vport_create()
- Created a Documentation/scsi/scsi_fc_transport.txt file that describes
the interfaces and expected LLDD behaviors.
Signed-off-by: James Smart <James.Smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/scsi/scsi_transport_fc.c b/drivers/scsi/scsi_transport_fc.c
index b4d1ece..2176514 100644
--- a/drivers/scsi/scsi_transport_fc.c
+++ b/drivers/scsi/scsi_transport_fc.c
@@ -19,7 +19,7 @@
*
* ========
*
- * Copyright (C) 2004-2005 James Smart, Emulex Corporation
+ * Copyright (C) 2004-2007 James Smart, Emulex Corporation
* Rewrite for host, target, device, and remote port attributes,
* statistics, and service functions...
*
@@ -39,6 +39,33 @@
static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
/*
+ * This is a temporary carrier for creating a vport. It will eventually
+ * be replaced by a real message definition for sgio or netlink.
+ *
+ * fc_vport_identifiers: This set of data contains all elements
+ * to uniquely identify and instantiate a FC virtual port.
+ *
+ * Notes:
+ * symbolic_name: The driver is to append the symbolic_name string data
+ * to the symbolic_node_name data that it generates by default.
+ * the resulting combination should then be registered with the switch.
+ * It is expected that things like Xen may stuff a VM title into
+ * this field.
+ */
+struct fc_vport_identifiers {
+ u64 node_name;
+ u64 port_name;
+ u32 roles;
+ bool disable;
+ enum fc_port_type vport_type; /* only FC_PORTTYPE_NPIV allowed */
+ char symbolic_name[FC_VPORT_SYMBOLIC_NAMELEN];
+};
+
+static int fc_vport_create(struct Scsi_Host *shost, int channel,
+ struct device *pdev, struct fc_vport_identifiers *ids,
+ struct fc_vport **vport);
+
+/*
* Redefine so that we can have same named attributes in the
* sdev/starget/host objects.
*/
@@ -90,10 +117,14 @@
{ FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" },
{ FC_PORTTYPE_LPORT, "LPort (private loop)" },
{ FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection" },
+ { FC_PORTTYPE_NPIV, "NPIV VPORT" },
};
fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
#define FC_PORTTYPE_MAX_NAMELEN 50
+/* Reuse fc_port_type enum function for vport_type */
+#define get_fc_vport_type_name get_fc_port_type_name
+
/* Convert fc_host_event_code values to ascii string name */
static const struct {
@@ -139,6 +170,29 @@
#define FC_PORTSTATE_MAX_NAMELEN 20
+/* Convert fc_vport_state values to ascii string name */
+static struct {
+ enum fc_vport_state value;
+ char *name;
+} fc_vport_state_names[] = {
+ { FC_VPORT_UNKNOWN, "Unknown" },
+ { FC_VPORT_ACTIVE, "Active" },
+ { FC_VPORT_DISABLED, "Disabled" },
+ { FC_VPORT_LINKDOWN, "Linkdown" },
+ { FC_VPORT_INITIALIZING, "Initializing" },
+ { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" },
+ { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" },
+ { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" },
+ { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" },
+ { FC_VPORT_FAILED, "VPort Failed" },
+};
+fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names)
+#define FC_VPORTSTATE_MAX_NAMELEN 24
+
+/* Reuse fc_vport_state enum function for vport_last_state */
+#define get_fc_vport_last_state_name get_fc_vport_state_name
+
+
/* Convert fc_tgtid_binding_type values to ascii string name */
static const struct {
enum fc_tgtid_binding_type value;
@@ -219,16 +273,16 @@
}
-/* Convert FC_RPORT_ROLE bit values to ascii string name */
+/* Convert FC_PORT_ROLE bit values to ascii string name */
static const struct {
u32 value;
char *name;
-} fc_remote_port_role_names[] = {
- { FC_RPORT_ROLE_FCP_TARGET, "FCP Target" },
- { FC_RPORT_ROLE_FCP_INITIATOR, "FCP Initiator" },
- { FC_RPORT_ROLE_IP_PORT, "IP Port" },
+} fc_port_role_names[] = {
+ { FC_PORT_ROLE_FCP_TARGET, "FCP Target" },
+ { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" },
+ { FC_PORT_ROLE_IP_PORT, "IP Port" },
};
-fc_bitfield_name_search(remote_port_roles, fc_remote_port_role_names)
+fc_bitfield_name_search(port_roles, fc_port_role_names)
/*
* Define roles that are specific to port_id. Values are relative to ROLE_MASK.
@@ -252,7 +306,8 @@
*/
#define FC_STARGET_NUM_ATTRS 3
#define FC_RPORT_NUM_ATTRS 10
-#define FC_HOST_NUM_ATTRS 17
+#define FC_VPORT_NUM_ATTRS 9
+#define FC_HOST_NUM_ATTRS 21
struct fc_internal {
struct scsi_transport_template t;
@@ -278,6 +333,10 @@
struct transport_container rport_attr_cont;
struct class_device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
struct class_device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
+
+ struct transport_container vport_attr_cont;
+ struct class_device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS];
+ struct class_device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1];
};
#define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t)
@@ -331,6 +390,7 @@
sizeof(fc_host->supported_fc4s));
fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
fc_host->maxframe_size = -1;
+ fc_host->max_npiv_vports = 0;
memset(fc_host->serial_number, 0,
sizeof(fc_host->serial_number));
@@ -348,8 +408,11 @@
INIT_LIST_HEAD(&fc_host->rports);
INIT_LIST_HEAD(&fc_host->rport_bindings);
+ INIT_LIST_HEAD(&fc_host->vports);
fc_host->next_rport_number = 0;
fc_host->next_target_id = 0;
+ fc_host->next_vport_number = 0;
+ fc_host->npiv_vports_inuse = 0;
snprintf(fc_host->work_q_name, KOBJ_NAME_LEN, "fc_wq_%d",
shost->host_no);
@@ -388,6 +451,16 @@
NULL);
/*
+ * Setup and Remove actions for virtual ports are handled
+ * in the service functions below.
+ */
+static DECLARE_TRANSPORT_CLASS(fc_vport_class,
+ "fc_vports",
+ NULL,
+ NULL,
+ NULL);
+
+/*
* Module Parameters
*/
@@ -585,6 +658,9 @@
error = transport_class_register(&fc_host_class);
if (error)
return error;
+ error = transport_class_register(&fc_vport_class);
+ if (error)
+ return error;
error = transport_class_register(&fc_rport_class);
if (error)
return error;
@@ -596,6 +672,7 @@
transport_class_unregister(&fc_transport_class);
transport_class_unregister(&fc_rport_class);
transport_class_unregister(&fc_host_class);
+ transport_class_unregister(&fc_vport_class);
}
/*
@@ -800,9 +877,9 @@
return snprintf(buf, 30, "Unknown Fabric Entity\n");
}
} else {
- if (rport->roles == FC_RPORT_ROLE_UNKNOWN)
+ if (rport->roles == FC_PORT_ROLE_UNKNOWN)
return snprintf(buf, 20, "unknown\n");
- return get_fc_remote_port_roles_names(rport->roles, buf);
+ return get_fc_port_roles_names(rport->roles, buf);
}
}
static FC_CLASS_DEVICE_ATTR(rport, roles, S_IRUGO,
@@ -857,7 +934,7 @@
/*
* Note: in the target show function we recognize when the remote
- * port is in the hierarchy and do not allow the driver to get
+ * port is in the heirarchy and do not allow the driver to get
* involved in sysfs functions. The driver only gets involved if
* it's the "old" style that doesn't use rports.
*/
@@ -912,6 +989,260 @@
/*
+ * FC Virtual Port Attribute Management
+ */
+
+#define fc_vport_show_function(field, format_string, sz, cast) \
+static ssize_t \
+show_fc_vport_##field (struct class_device *cdev, char *buf) \
+{ \
+ struct fc_vport *vport = transport_class_to_vport(cdev); \
+ struct Scsi_Host *shost = vport_to_shost(vport); \
+ struct fc_internal *i = to_fc_internal(shost->transportt); \
+ if ((i->f->get_vport_##field) && \
+ !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \
+ i->f->get_vport_##field(vport); \
+ return snprintf(buf, sz, format_string, cast vport->field); \
+}
+
+#define fc_vport_store_function(field) \
+static ssize_t \
+store_fc_vport_##field(struct class_device *cdev, const char *buf, \
+ size_t count) \
+{ \
+ int val; \
+ struct fc_vport *vport = transport_class_to_vport(cdev); \
+ struct Scsi_Host *shost = vport_to_shost(vport); \
+ struct fc_internal *i = to_fc_internal(shost->transportt); \
+ char *cp; \
+ if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
+ return -EBUSY; \
+ val = simple_strtoul(buf, &cp, 0); \
+ if (*cp && (*cp != '\n')) \
+ return -EINVAL; \
+ i->f->set_vport_##field(vport, val); \
+ return count; \
+}
+
+#define fc_vport_store_str_function(field, slen) \
+static ssize_t \
+store_fc_vport_##field(struct class_device *cdev, const char *buf, \
+ size_t count) \
+{ \
+ struct fc_vport *vport = transport_class_to_vport(cdev); \
+ struct Scsi_Host *shost = vport_to_shost(vport); \
+ struct fc_internal *i = to_fc_internal(shost->transportt); \
+ unsigned int cnt=count; \
+ \
+ /* count may include a LF at end of string */ \
+ if (buf[cnt-1] == '\n') \
+ cnt--; \
+ if (cnt > ((slen) - 1)) \
+ return -EINVAL; \
+ memcpy(vport->field, buf, cnt); \
+ i->f->set_vport_##field(vport); \
+ return count; \
+}
+
+#define fc_vport_rd_attr(field, format_string, sz) \
+ fc_vport_show_function(field, format_string, sz, ) \
+static FC_CLASS_DEVICE_ATTR(vport, field, S_IRUGO, \
+ show_fc_vport_##field, NULL)
+
+#define fc_vport_rd_attr_cast(field, format_string, sz, cast) \
+ fc_vport_show_function(field, format_string, sz, (cast)) \
+static FC_CLASS_DEVICE_ATTR(vport, field, S_IRUGO, \
+ show_fc_vport_##field, NULL)
+
+#define fc_vport_rw_attr(field, format_string, sz) \
+ fc_vport_show_function(field, format_string, sz, ) \
+ fc_vport_store_function(field) \
+static FC_CLASS_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
+ show_fc_vport_##field, \
+ store_fc_vport_##field)
+
+#define fc_private_vport_show_function(field, format_string, sz, cast) \
+static ssize_t \
+show_fc_vport_##field (struct class_device *cdev, char *buf) \
+{ \
+ struct fc_vport *vport = transport_class_to_vport(cdev); \
+ return snprintf(buf, sz, format_string, cast vport->field); \
+}
+
+#define fc_private_vport_store_u32_function(field) \
+static ssize_t \
+store_fc_vport_##field(struct class_device *cdev, const char *buf, \
+ size_t count) \
+{ \
+ u32 val; \
+ struct fc_vport *vport = transport_class_to_vport(cdev); \
+ char *cp; \
+ if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
+ return -EBUSY; \
+ val = simple_strtoul(buf, &cp, 0); \
+ if (*cp && (*cp != '\n')) \
+ return -EINVAL; \
+ vport->field = val; \
+ return count; \
+}
+
+
+#define fc_private_vport_rd_attr(field, format_string, sz) \
+ fc_private_vport_show_function(field, format_string, sz, ) \
+static FC_CLASS_DEVICE_ATTR(vport, field, S_IRUGO, \
+ show_fc_vport_##field, NULL)
+
+#define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \
+ fc_private_vport_show_function(field, format_string, sz, (cast)) \
+static FC_CLASS_DEVICE_ATTR(vport, field, S_IRUGO, \
+ show_fc_vport_##field, NULL)
+
+#define fc_private_vport_rw_u32_attr(field, format_string, sz) \
+ fc_private_vport_show_function(field, format_string, sz, ) \
+ fc_private_vport_store_u32_function(field) \
+static FC_CLASS_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
+ show_fc_vport_##field, \
+ store_fc_vport_##field)
+
+
+#define fc_private_vport_rd_enum_attr(title, maxlen) \
+static ssize_t \
+show_fc_vport_##title (struct class_device *cdev, char *buf) \
+{ \
+ struct fc_vport *vport = transport_class_to_vport(cdev); \
+ const char *name; \
+ name = get_fc_##title##_name(vport->title); \
+ if (!name) \
+ return -EINVAL; \
+ return snprintf(buf, maxlen, "%s\n", name); \
+} \
+static FC_CLASS_DEVICE_ATTR(vport, title, S_IRUGO, \
+ show_fc_vport_##title, NULL)
+
+
+#define SETUP_VPORT_ATTRIBUTE_RD(field) \
+ i->private_vport_attrs[count] = class_device_attr_vport_##field; \
+ i->private_vport_attrs[count].attr.mode = S_IRUGO; \
+ i->private_vport_attrs[count].store = NULL; \
+ i->vport_attrs[count] = &i->private_vport_attrs[count]; \
+ if (i->f->get_##field) \
+ count++
+ /* NOTE: Above MACRO differs: checks function not show bit */
+
+#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \
+ i->private_vport_attrs[count] = class_device_attr_vport_##field; \
+ i->private_vport_attrs[count].attr.mode = S_IRUGO; \
+ i->private_vport_attrs[count].store = NULL; \
+ i->vport_attrs[count] = &i->private_vport_attrs[count]; \
+ count++
+
+#define SETUP_VPORT_ATTRIBUTE_WR(field) \
+ i->private_vport_attrs[count] = class_device_attr_vport_##field; \
+ i->vport_attrs[count] = &i->private_vport_attrs[count]; \
+ if (i->f->field) \
+ count++
+ /* NOTE: Above MACRO differs: checks function */
+
+#define SETUP_VPORT_ATTRIBUTE_RW(field) \
+ i->private_vport_attrs[count] = class_device_attr_vport_##field; \
+ if (!i->f->set_vport_##field) { \
+ i->private_vport_attrs[count].attr.mode = S_IRUGO; \
+ i->private_vport_attrs[count].store = NULL; \
+ } \
+ i->vport_attrs[count] = &i->private_vport_attrs[count]; \
+ count++
+ /* NOTE: Above MACRO differs: does not check show bit */
+
+#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \
+{ \
+ i->private_vport_attrs[count] = class_device_attr_vport_##field; \
+ i->vport_attrs[count] = &i->private_vport_attrs[count]; \
+ count++; \
+}
+
+
+/* The FC Transport Virtual Port Attributes: */
+
+/* Fixed Virtual Port Attributes */
+
+/* Dynamic Virtual Port Attributes */
+
+/* Private Virtual Port Attributes */
+
+fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN);
+fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN);
+fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
+fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
+
+static ssize_t
+show_fc_vport_roles (struct class_device *cdev, char *buf)
+{
+ struct fc_vport *vport = transport_class_to_vport(cdev);
+
+ if (vport->roles == FC_PORT_ROLE_UNKNOWN)
+ return snprintf(buf, 20, "unknown\n");
+ return get_fc_port_roles_names(vport->roles, buf);
+}
+static FC_CLASS_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL);
+
+fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN);
+
+fc_private_vport_show_function(symbolic_name, "%s\n",
+ FC_VPORT_SYMBOLIC_NAMELEN + 1, )
+fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN)
+static FC_CLASS_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR,
+ show_fc_vport_symbolic_name, store_fc_vport_symbolic_name);
+
+static ssize_t
+store_fc_vport_delete(struct class_device *cdev, const char *buf,
+ size_t count)
+{
+ struct fc_vport *vport = transport_class_to_vport(cdev);
+ int stat;
+
+ stat = fc_vport_terminate(vport);
+ if (stat)
+ return stat;
+
+ return count;
+}
+static FC_CLASS_DEVICE_ATTR(vport, vport_delete, S_IWUSR,
+ NULL, store_fc_vport_delete);
+
+
+/*
+ * Enable/Disable vport
+ * Write "1" to disable, write "0" to enable
+ */
+static ssize_t
+store_fc_vport_disable(struct class_device *cdev, const char *buf,
+ size_t count)
+{
+ struct fc_vport *vport = transport_class_to_vport(cdev);
+ struct Scsi_Host *shost = vport_to_shost(vport);
+ struct fc_internal *i = to_fc_internal(shost->transportt);
+ int stat;
+
+ if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
+ return -EBUSY;
+
+ if (*buf == '0') {
+ if (vport->vport_state != FC_VPORT_DISABLED)
+ return -EALREADY;
+ } else if (*buf == '1') {
+ if (vport->vport_state == FC_VPORT_DISABLED)
+ return -EALREADY;
+ } else
+ return -EINVAL;
+
+ stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true));
+ return stat ? stat : count;
+}
+static FC_CLASS_DEVICE_ATTR(vport, vport_disable, S_IWUSR,
+ NULL, store_fc_vport_disable);
+
+
+/*
* Host Attribute Management
*/
@@ -1003,6 +1334,13 @@
if (i->f->show_host_##field) \
count++
+#define SETUP_HOST_ATTRIBUTE_RD_NS(field) \
+ i->private_host_attrs[count] = class_device_attr_host_##field; \
+ i->private_host_attrs[count].attr.mode = S_IRUGO; \
+ i->private_host_attrs[count].store = NULL; \
+ i->host_attrs[count] = &i->private_host_attrs[count]; \
+ count++
+
#define SETUP_HOST_ATTRIBUTE_RW(field) \
i->private_host_attrs[count] = class_device_attr_host_##field; \
if (!i->f->set_host_##field) { \
@@ -1090,6 +1428,7 @@
fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
unsigned long long);
fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
+fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20);
fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
@@ -1210,6 +1549,9 @@
static FC_CLASS_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
store_fc_private_host_issue_lip);
+fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20);
+
+
/*
* Host Statistics Management
*/
@@ -1285,7 +1627,6 @@
static FC_CLASS_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
fc_reset_statistics);
-
static struct attribute *fc_statistics_attrs[] = {
&class_device_attr_host_seconds_since_last_reset.attr,
&class_device_attr_host_tx_frames.attr,
@@ -1316,6 +1657,142 @@
.attrs = fc_statistics_attrs,
};
+
+/* Host Vport Attributes */
+
+static int
+fc_parse_wwn(const char *ns, u64 *nm)
+{
+ unsigned int i, j;
+ u8 wwn[8];
+
+ memset(wwn, 0, sizeof(wwn));
+
+ /* Validate and store the new name */
+ for (i=0, j=0; i < 16; i++) {
+ if ((*ns >= 'a') && (*ns <= 'f'))
+ j = ((j << 4) | ((*ns++ -'a') + 10));
+ else if ((*ns >= 'A') && (*ns <= 'F'))
+ j = ((j << 4) | ((*ns++ -'A') + 10));
+ else if ((*ns >= '0') && (*ns <= '9'))
+ j = ((j << 4) | (*ns++ -'0'));
+ else
+ return -EINVAL;
+ if (i % 2) {
+ wwn[i/2] = j & 0xff;
+ j = 0;
+ }
+ }
+
+ *nm = wwn_to_u64(wwn);
+
+ return 0;
+}
+
+
+/*
+ * "Short-cut" sysfs variable to create a new vport on a FC Host.
+ * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
+ * will default to a NPIV-based FCP_Initiator; The WWNs are specified
+ * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
+ */
+static ssize_t
+store_fc_host_vport_create(struct class_device *cdev, const char *buf,
+ size_t count)
+{
+ struct Scsi_Host *shost = transport_class_to_shost(cdev);
+ struct fc_vport_identifiers vid;
+ struct fc_vport *vport;
+ unsigned int cnt=count;
+ int stat;
+
+ memset(&vid, 0, sizeof(vid));
+
+ /* count may include a LF at end of string */
+ if (buf[cnt-1] == '\n')
+ cnt--;
+
+ /* validate we have enough characters for WWPN */
+ if ((cnt != (16+1+16)) || (buf[16] != ':'))
+ return -EINVAL;
+
+ stat = fc_parse_wwn(&buf[0], &vid.port_name);
+ if (stat)
+ return stat;
+
+ stat = fc_parse_wwn(&buf[17], &vid.node_name);
+ if (stat)
+ return stat;
+
+ vid.roles = FC_PORT_ROLE_FCP_INITIATOR;
+ vid.vport_type = FC_PORTTYPE_NPIV;
+ /* vid.symbolic_name is already zero/NULL's */
+ vid.disable = false; /* always enabled */
+
+ /* we only allow support on Channel 0 !!! */
+ stat = fc_vport_create(shost, 0, &shost->shost_gendev, &vid, &vport);
+ return stat ? stat : count;
+}
+static FC_CLASS_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL,
+ store_fc_host_vport_create);
+
+
+/*
+ * "Short-cut" sysfs variable to delete a vport on a FC Host.
+ * Vport is identified by a string containing "<WWPN>:<WWNN>".
+ * The WWNs are specified as hex characters, and may *not* contain
+ * any prefixes (e.g. 0x, x, etc)
+ */
+static ssize_t
+store_fc_host_vport_delete(struct class_device *cdev, const char *buf,
+ size_t count)
+{
+ struct Scsi_Host *shost = transport_class_to_shost(cdev);
+ struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
+ struct fc_vport *vport;
+ u64 wwpn, wwnn;
+ unsigned long flags;
+ unsigned int cnt=count;
+ int stat, match;
+
+ /* count may include a LF at end of string */
+ if (buf[cnt-1] == '\n')
+ cnt--;
+
+ /* validate we have enough characters for WWPN */
+ if ((cnt != (16+1+16)) || (buf[16] != ':'))
+ return -EINVAL;
+
+ stat = fc_parse_wwn(&buf[0], &wwpn);
+ if (stat)
+ return stat;
+
+ stat = fc_parse_wwn(&buf[17], &wwnn);
+ if (stat)
+ return stat;
+
+ spin_lock_irqsave(shost->host_lock, flags);
+ match = 0;
+ /* we only allow support on Channel 0 !!! */
+ list_for_each_entry(vport, &fc_host->vports, peers) {
+ if ((vport->channel == 0) &&
+ (vport->port_name == wwpn) && (vport->node_name == wwnn)) {
+ match = 1;
+ break;
+ }
+ }
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ if (!match)
+ return -ENODEV;
+
+ stat = fc_vport_terminate(vport);
+ return stat ? stat : count;
+}
+static FC_CLASS_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL,
+ store_fc_host_vport_delete);
+
+
static int fc_host_match(struct attribute_container *cont,
struct device *dev)
{
@@ -1387,6 +1864,40 @@
}
+static void fc_vport_dev_release(struct device *dev)
+{
+ struct fc_vport *vport = dev_to_vport(dev);
+ put_device(dev->parent); /* release kobj parent */
+ kfree(vport);
+}
+
+int scsi_is_fc_vport(const struct device *dev)
+{
+ return dev->release == fc_vport_dev_release;
+}
+EXPORT_SYMBOL(scsi_is_fc_vport);
+
+static int fc_vport_match(struct attribute_container *cont,
+ struct device *dev)
+{
+ struct fc_vport *vport;
+ struct Scsi_Host *shost;
+ struct fc_internal *i;
+
+ if (!scsi_is_fc_vport(dev))
+ return 0;
+ vport = dev_to_vport(dev);
+
+ shost = vport_to_shost(vport);
+ if (!shost->transportt || shost->transportt->host_attrs.ac.class
+ != &fc_host_class.class)
+ return 0;
+
+ i = to_fc_internal(shost->transportt);
+ return &i->vport_attr_cont.ac == cont;
+}
+
+
/**
* fc_timed_out - FC Transport I/O timeout intercept handler
*
@@ -1472,6 +1983,11 @@
i->rport_attr_cont.ac.match = fc_rport_match;
transport_container_register(&i->rport_attr_cont);
+ i->vport_attr_cont.ac.attrs = &i->vport_attrs[0];
+ i->vport_attr_cont.ac.class = &fc_vport_class.class;
+ i->vport_attr_cont.ac.match = fc_vport_match;
+ transport_container_register(&i->vport_attr_cont);
+
i->f = ft;
/* Transport uses the shost workq for scsi scanning */
@@ -1505,6 +2021,10 @@
SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
+ if (ft->vport_create) {
+ SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports);
+ SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse);
+ }
SETUP_HOST_ATTRIBUTE_RD(serial_number);
SETUP_HOST_ATTRIBUTE_RD(port_id);
@@ -1520,6 +2040,10 @@
SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
if (ft->issue_fc_host_lip)
SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
+ if (ft->vport_create)
+ SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create);
+ if (ft->vport_delete)
+ SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete);
BUG_ON(count > FC_HOST_NUM_ATTRS);
@@ -1545,6 +2069,24 @@
i->rport_attrs[count] = NULL;
+ /*
+ * Setup Virtual Port Attributes.
+ */
+ count=0;
+ SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state);
+ SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state);
+ SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name);
+ SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name);
+ SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles);
+ SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type);
+ SETUP_VPORT_ATTRIBUTE_RW(symbolic_name);
+ SETUP_VPORT_ATTRIBUTE_WR(vport_delete);
+ SETUP_VPORT_ATTRIBUTE_WR(vport_disable);
+
+ BUG_ON(count > FC_VPORT_NUM_ATTRS);
+
+ i->vport_attrs[count] = NULL;
+
return &i->t;
}
EXPORT_SYMBOL(fc_attach_transport);
@@ -1556,6 +2098,7 @@
transport_container_unregister(&i->t.target_attrs);
transport_container_unregister(&i->t.host_attrs);
transport_container_unregister(&i->rport_attr_cont);
+ transport_container_unregister(&i->vport_attr_cont);
kfree(i);
}
@@ -1667,9 +2210,28 @@
void
fc_remove_host(struct Scsi_Host *shost)
{
- struct fc_rport *rport, *next_rport;
+ struct fc_vport *vport = NULL, *next_vport = NULL;
+ struct fc_rport *rport = NULL, *next_rport = NULL;
struct workqueue_struct *work_q;
struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
+ unsigned long flags;
+ int stat;
+
+ spin_lock_irqsave(shost->host_lock, flags);
+
+ /* Remove any vports */
+ list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) {
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ /* this must be called synchronously */
+ stat = fc_vport_terminate(vport);
+ spin_lock_irqsave(shost->host_lock, flags);
+ if (stat)
+ dev_printk(KERN_ERR, vport->dev.parent,
+ "%s: %s could not be deleted created via "
+ "shost%d channel %d\n", __FUNCTION__,
+ vport->dev.bus_id, vport->shost->host_no,
+ vport->channel);
+ }
/* Remove any remote ports */
list_for_each_entry_safe(rport, next_rport,
@@ -1686,6 +2248,8 @@
fc_queue_work(shost, &rport->rport_delete_work);
}
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
/* flush all scan work items */
scsi_flush_work(shost);
@@ -1844,7 +2408,7 @@
spin_lock_irqsave(shost->host_lock, flags);
rport->number = fc_host->next_rport_number++;
- if (rport->roles & FC_RPORT_ROLE_FCP_TARGET)
+ if (rport->roles & FC_PORT_ROLE_FCP_TARGET)
rport->scsi_target_id = fc_host->next_target_id++;
else
rport->scsi_target_id = -1;
@@ -1869,7 +2433,7 @@
transport_add_device(dev);
transport_configure_device(dev);
- if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) {
+ if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
/* initiate a scan of the target */
rport->flags |= FC_RPORT_SCAN_PENDING;
scsi_queue_work(shost, &rport->scan_work);
@@ -2003,7 +2567,7 @@
/* was a target, not in roles */
if ((rport->scsi_target_id != -1) &&
- (!(ids->roles & FC_RPORT_ROLE_FCP_TARGET)))
+ (!(ids->roles & FC_PORT_ROLE_FCP_TARGET)))
return rport;
/*
@@ -2086,7 +2650,7 @@
memset(rport->dd_data, 0,
fci->f->dd_fcrport_size);
- if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) {
+ if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
/* initiate a scan of the target */
rport->flags |= FC_RPORT_SCAN_PENDING;
scsi_queue_work(shost, &rport->scan_work);
@@ -2243,11 +2807,11 @@
int create = 0;
spin_lock_irqsave(shost->host_lock, flags);
- if (roles & FC_RPORT_ROLE_FCP_TARGET) {
+ if (roles & FC_PORT_ROLE_FCP_TARGET) {
if (rport->scsi_target_id == -1) {
rport->scsi_target_id = fc_host->next_target_id++;
create = 1;
- } else if (!(rport->roles & FC_RPORT_ROLE_FCP_TARGET))
+ } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
create = 1;
}
@@ -2317,7 +2881,7 @@
*/
if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
(rport->scsi_target_id != -1) &&
- !(rport->roles & FC_RPORT_ROLE_FCP_TARGET)) {
+ !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
dev_printk(KERN_ERR, &rport->dev,
"blocked FC remote port time out: no longer"
" a FCP target, removing starget\n");
@@ -2367,7 +2931,7 @@
*/
rport->maxframe_size = -1;
rport->supported_classes = FC_COS_UNSPECIFIED;
- rport->roles = FC_RPORT_ROLE_UNKNOWN;
+ rport->roles = FC_PORT_ROLE_UNKNOWN;
rport->port_state = FC_PORTSTATE_NOTPRESENT;
/* remove the identifiers that aren't used in the consisting binding */
@@ -2436,7 +3000,7 @@
unsigned long flags;
if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
- (rport->roles & FC_RPORT_ROLE_FCP_TARGET)) {
+ (rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
scsi_scan_target(&rport->dev, rport->channel,
rport->scsi_target_id, SCAN_WILD_CARD, 1);
}
@@ -2447,6 +3011,203 @@
}
+/**
+ * fc_vport_create - allocates and creates a FC virtual port.
+ * @shost: scsi host the virtual port is connected to.
+ * @channel: Channel on shost port connected to.
+ * @pdev: parent device for vport
+ * @ids: The world wide names, FC4 port roles, etc for
+ * the virtual port.
+ * @ret_vport: The pointer to the created vport.
+ *
+ * Allocates and creates the vport structure, calls the parent host
+ * to instantiate the vport, the completes w/ class and sysfs creation.
+ *
+ * Notes:
+ * This routine assumes no locks are held on entry.
+ **/
+static int
+fc_vport_create(struct Scsi_Host *shost, int channel, struct device *pdev,
+ struct fc_vport_identifiers *ids, struct fc_vport **ret_vport)
+{
+ struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
+ struct fc_internal *fci = to_fc_internal(shost->transportt);
+ struct fc_vport *vport;
+ struct device *dev;
+ unsigned long flags;
+ size_t size;
+ int error;
+
+ *ret_vport = NULL;
+
+ if ( ! fci->f->vport_create)
+ return -ENOENT;
+
+ size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size);
+ vport = kzalloc(size, GFP_KERNEL);
+ if (unlikely(!vport)) {
+ printk(KERN_ERR "%s: allocation failure\n", __FUNCTION__);
+ return -ENOMEM;
+ }
+
+ vport->vport_state = FC_VPORT_UNKNOWN;
+ vport->vport_last_state = FC_VPORT_UNKNOWN;
+ vport->node_name = ids->node_name;
+ vport->port_name = ids->port_name;
+ vport->roles = ids->roles;
+ vport->vport_type = ids->vport_type;
+ if (fci->f->dd_fcvport_size)
+ vport->dd_data = &vport[1];
+ vport->shost = shost;
+ vport->channel = channel;
+ vport->flags = FC_VPORT_CREATING;
+
+ spin_lock_irqsave(shost->host_lock, flags);
+
+ if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) {
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ kfree(vport);
+ return -ENOSPC;
+ }
+ fc_host->npiv_vports_inuse++;
+ vport->number = fc_host->next_vport_number++;
+ list_add_tail(&vport->peers, &fc_host->vports);
+ get_device(&shost->shost_gendev); /* for fc_host->vport list */
+
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ dev = &vport->dev;
+ device_initialize(dev); /* takes self reference */
+ dev->parent = get_device(pdev); /* takes parent reference */
+ dev->release = fc_vport_dev_release;
+ sprintf(dev->bus_id, "vport-%d:%d-%d",
+ shost->host_no, channel, vport->number);
+ transport_setup_device(dev);
+
+ error = device_add(dev);
+ if (error) {
+ printk(KERN_ERR "FC Virtual Port device_add failed\n");
+ goto delete_vport;
+ }
+ transport_add_device(dev);
+ transport_configure_device(dev);
+
+ error = fci->f->vport_create(vport, ids->disable);
+ if (error) {
+ printk(KERN_ERR "FC Virtual Port LLDD Create failed\n");
+ goto delete_vport_all;
+ }
+
+ /*
+ * if the parent isn't the physical adapter's Scsi_Host, ensure
+ * the Scsi_Host at least contains ia symlink to the vport.
+ */
+ if (pdev != &shost->shost_gendev) {
+ error = sysfs_create_link(&shost->shost_gendev.kobj,
+ &dev->kobj, dev->bus_id);
+ if (error)
+ printk(KERN_ERR
+ "%s: Cannot create vport symlinks for "
+ "%s, err=%d\n",
+ __FUNCTION__, dev->bus_id, error);
+ }
+ spin_lock_irqsave(shost->host_lock, flags);
+ vport->flags &= ~FC_VPORT_CREATING;
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ dev_printk(KERN_NOTICE, pdev,
+ "%s created via shost%d channel %d\n", dev->bus_id,
+ shost->host_no, channel);
+
+ *ret_vport = vport;
+
+ return 0;
+
+delete_vport_all:
+ transport_remove_device(dev);
+ device_del(dev);
+delete_vport:
+ transport_destroy_device(dev);
+ spin_lock_irqsave(shost->host_lock, flags);
+ list_del(&vport->peers);
+ put_device(&shost->shost_gendev); /* for fc_host->vport list */
+ fc_host->npiv_vports_inuse--;
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ put_device(dev->parent);
+ kfree(vport);
+
+ return error;
+}
+
+
+/**
+ * fc_vport_terminate - Admin App or LLDD requests termination of a vport
+ * @vport: fc_vport to be terminated
+ *
+ * Calls the LLDD vport_delete() function, then deallocates and removes
+ * the vport from the shost and object tree.
+ *
+ * Notes:
+ * This routine assumes no locks are held on entry.
+ **/
+int
+fc_vport_terminate(struct fc_vport *vport)
+{
+ struct Scsi_Host *shost = vport_to_shost(vport);
+ struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
+ struct fc_internal *i = to_fc_internal(shost->transportt);
+ struct device *dev = &vport->dev;
+ unsigned long flags;
+ int stat;
+
+ spin_lock_irqsave(shost->host_lock, flags);
+ if (vport->flags & FC_VPORT_CREATING) {
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ return -EBUSY;
+ }
+ if (vport->flags & (FC_VPORT_DEL)) {
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ return -EALREADY;
+ }
+ vport->flags |= FC_VPORT_DELETING;
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ if (i->f->vport_delete)
+ stat = i->f->vport_delete(vport);
+ else
+ stat = -ENOENT;
+
+ spin_lock_irqsave(shost->host_lock, flags);
+ vport->flags &= ~FC_VPORT_DELETING;
+ if (!stat) {
+ vport->flags |= FC_VPORT_DELETED;
+ list_del(&vport->peers);
+ fc_host->npiv_vports_inuse--;
+ put_device(&shost->shost_gendev); /* for fc_host->vport list */
+ }
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ if (stat)
+ return stat;
+
+ if (dev->parent != &shost->shost_gendev)
+ sysfs_remove_link(&shost->shost_gendev.kobj, dev->bus_id);
+ transport_remove_device(dev);
+ device_del(dev);
+ transport_destroy_device(dev);
+
+ /*
+ * Removing our self-reference should mean our
+ * release function gets called, which will drop the remaining
+ * parent reference and free the data structure.
+ */
+ put_device(dev); /* for self-reference */
+
+ return 0; /* SUCCESS */
+}
+EXPORT_SYMBOL(fc_vport_terminate);
+
+
MODULE_AUTHOR("Martin Hicks");
MODULE_DESCRIPTION("FC Transport Attributes");
MODULE_LICENSE("GPL");