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-rw-r--r--drivers/scsi/fcoe/Makefile2
-rw-r--r--drivers/scsi/fcoe/fcoe.c621
-rw-r--r--drivers/scsi/fcoe/fcoe.h50
-rw-r--r--drivers/scsi/fcoe/fcoe_ctlr.c (renamed from drivers/scsi/fcoe/libfcoe.c)40
-rw-r--r--drivers/scsi/fcoe/fcoe_transport.c770
-rw-r--r--drivers/scsi/fcoe/libfcoe.h31
6 files changed, 1038 insertions, 476 deletions
diff --git a/drivers/scsi/fcoe/Makefile b/drivers/scsi/fcoe/Makefile
index 950f27615c76..f6d37d0271f7 100644
--- a/drivers/scsi/fcoe/Makefile
+++ b/drivers/scsi/fcoe/Makefile
@@ -1,2 +1,4 @@
obj-$(CONFIG_FCOE) += fcoe.o
obj-$(CONFIG_LIBFCOE) += libfcoe.o
+
+libfcoe-objs := fcoe_ctlr.o fcoe_transport.o
diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
index 3becc6a20a4f..bde6ee5333eb 100644
--- a/drivers/scsi/fcoe/fcoe.c
+++ b/drivers/scsi/fcoe/fcoe.c
@@ -31,6 +31,7 @@
#include <linux/fs.h>
#include <linux/sysfs.h>
#include <linux/ctype.h>
+#include <linux/workqueue.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsicam.h>
#include <scsi/scsi_transport.h>
@@ -58,6 +59,8 @@ MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \
DEFINE_MUTEX(fcoe_config_mutex);
+static struct workqueue_struct *fcoe_wq;
+
/* fcoe_percpu_clean completion. Waiter protected by fcoe_create_mutex */
static DECLARE_COMPLETION(fcoe_flush_completion);
@@ -72,7 +75,6 @@ static int fcoe_xmit(struct fc_lport *, struct fc_frame *);
static int fcoe_rcv(struct sk_buff *, struct net_device *,
struct packet_type *, struct net_device *);
static int fcoe_percpu_receive_thread(void *);
-static void fcoe_clean_pending_queue(struct fc_lport *);
static void fcoe_percpu_clean(struct fc_lport *);
static int fcoe_link_speed_update(struct fc_lport *);
static int fcoe_link_ok(struct fc_lport *);
@@ -80,7 +82,6 @@ static int fcoe_link_ok(struct fc_lport *);
static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *);
static int fcoe_hostlist_add(const struct fc_lport *);
-static void fcoe_check_wait_queue(struct fc_lport *, struct sk_buff *);
static int fcoe_device_notification(struct notifier_block *, ulong, void *);
static void fcoe_dev_setup(void);
static void fcoe_dev_cleanup(void);
@@ -101,10 +102,11 @@ static int fcoe_ddp_done(struct fc_lport *, u16);
static int fcoe_cpu_callback(struct notifier_block *, unsigned long, void *);
-static int fcoe_create(const char *, struct kernel_param *);
-static int fcoe_destroy(const char *, struct kernel_param *);
-static int fcoe_enable(const char *, struct kernel_param *);
-static int fcoe_disable(const char *, struct kernel_param *);
+static bool fcoe_match(struct net_device *netdev);
+static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode);
+static int fcoe_destroy(struct net_device *netdev);
+static int fcoe_enable(struct net_device *netdev);
+static int fcoe_disable(struct net_device *netdev);
static struct fc_seq *fcoe_elsct_send(struct fc_lport *,
u32 did, struct fc_frame *,
@@ -117,24 +119,6 @@ static void fcoe_recv_frame(struct sk_buff *skb);
static void fcoe_get_lesb(struct fc_lport *, struct fc_els_lesb *);
-module_param_call(create, fcoe_create, NULL, (void *)FIP_MODE_FABRIC, S_IWUSR);
-__MODULE_PARM_TYPE(create, "string");
-MODULE_PARM_DESC(create, " Creates fcoe instance on a ethernet interface");
-module_param_call(create_vn2vn, fcoe_create, NULL,
- (void *)FIP_MODE_VN2VN, S_IWUSR);
-__MODULE_PARM_TYPE(create_vn2vn, "string");
-MODULE_PARM_DESC(create_vn2vn, " Creates a VN_node to VN_node FCoE instance "
- "on an Ethernet interface");
-module_param_call(destroy, fcoe_destroy, NULL, NULL, S_IWUSR);
-__MODULE_PARM_TYPE(destroy, "string");
-MODULE_PARM_DESC(destroy, " Destroys fcoe instance on a ethernet interface");
-module_param_call(enable, fcoe_enable, NULL, NULL, S_IWUSR);
-__MODULE_PARM_TYPE(enable, "string");
-MODULE_PARM_DESC(enable, " Enables fcoe on a ethernet interface.");
-module_param_call(disable, fcoe_disable, NULL, NULL, S_IWUSR);
-__MODULE_PARM_TYPE(disable, "string");
-MODULE_PARM_DESC(disable, " Disables fcoe on a ethernet interface.");
-
/* notification function for packets from net device */
static struct notifier_block fcoe_notifier = {
.notifier_call = fcoe_device_notification,
@@ -145,8 +129,8 @@ static struct notifier_block fcoe_cpu_notifier = {
.notifier_call = fcoe_cpu_callback,
};
-static struct scsi_transport_template *fcoe_transport_template;
-static struct scsi_transport_template *fcoe_vport_transport_template;
+static struct scsi_transport_template *fcoe_nport_scsi_transport;
+static struct scsi_transport_template *fcoe_vport_scsi_transport;
static int fcoe_vport_destroy(struct fc_vport *);
static int fcoe_vport_create(struct fc_vport *, bool disabled);
@@ -163,7 +147,7 @@ static struct libfc_function_template fcoe_libfc_fcn_templ = {
.lport_set_port_id = fcoe_set_port_id,
};
-struct fc_function_template fcoe_transport_function = {
+struct fc_function_template fcoe_nport_fc_functions = {
.show_host_node_name = 1,
.show_host_port_name = 1,
.show_host_supported_classes = 1,
@@ -203,7 +187,7 @@ struct fc_function_template fcoe_transport_function = {
.bsg_request = fc_lport_bsg_request,
};
-struct fc_function_template fcoe_vport_transport_function = {
+struct fc_function_template fcoe_vport_fc_functions = {
.show_host_node_name = 1,
.show_host_port_name = 1,
.show_host_supported_classes = 1,
@@ -354,10 +338,18 @@ static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev,
struct fcoe_interface *fcoe;
int err;
+ if (!try_module_get(THIS_MODULE)) {
+ FCOE_NETDEV_DBG(netdev,
+ "Could not get a reference to the module\n");
+ fcoe = ERR_PTR(-EBUSY);
+ goto out;
+ }
+
fcoe = kzalloc(sizeof(*fcoe), GFP_KERNEL);
if (!fcoe) {
FCOE_NETDEV_DBG(netdev, "Could not allocate fcoe structure\n");
- return NULL;
+ fcoe = ERR_PTR(-ENOMEM);
+ goto out_nomod;
}
dev_hold(netdev);
@@ -376,9 +368,15 @@ static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev,
fcoe_ctlr_destroy(&fcoe->ctlr);
kfree(fcoe);
dev_put(netdev);
- return NULL;
+ fcoe = ERR_PTR(err);
+ goto out_nomod;
}
+ goto out;
+
+out_nomod:
+ module_put(THIS_MODULE);
+out:
return fcoe;
}
@@ -440,6 +438,7 @@ static void fcoe_interface_release(struct kref *kref)
fcoe_ctlr_destroy(&fcoe->ctlr);
kfree(fcoe);
dev_put(netdev);
+ module_put(THIS_MODULE);
}
/**
@@ -503,7 +502,7 @@ static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr)
{
struct fcoe_port *port = lport_priv(lport);
- struct fcoe_interface *fcoe = port->fcoe;
+ struct fcoe_interface *fcoe = port->priv;
rtnl_lock();
if (!is_zero_ether_addr(port->data_src_addr))
@@ -559,17 +558,6 @@ static int fcoe_lport_config(struct fc_lport *lport)
}
/**
- * fcoe_queue_timer() - The fcoe queue timer
- * @lport: The local port
- *
- * Calls fcoe_check_wait_queue on timeout
- */
-static void fcoe_queue_timer(ulong lport)
-{
- fcoe_check_wait_queue((struct fc_lport *)lport, NULL);
-}
-
-/**
* fcoe_get_wwn() - Get the world wide name from LLD if it supports it
* @netdev: the associated net device
* @wwn: the output WWN
@@ -648,7 +636,7 @@ static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev)
/* Setup lport private data to point to fcoe softc */
port = lport_priv(lport);
- fcoe = port->fcoe;
+ fcoe = port->priv;
/*
* Determine max frame size based on underlying device and optional
@@ -706,9 +694,9 @@ static int fcoe_shost_config(struct fc_lport *lport, struct device *dev)
lport->host->max_cmd_len = FCOE_MAX_CMD_LEN;
if (lport->vport)
- lport->host->transportt = fcoe_vport_transport_template;
+ lport->host->transportt = fcoe_vport_scsi_transport;
else
- lport->host->transportt = fcoe_transport_template;
+ lport->host->transportt = fcoe_nport_scsi_transport;
/* add the new host to the SCSI-ml */
rc = scsi_add_host(lport->host, dev);
@@ -758,7 +746,7 @@ bool fcoe_oem_match(struct fc_frame *fp)
static inline int fcoe_em_config(struct fc_lport *lport)
{
struct fcoe_port *port = lport_priv(lport);
- struct fcoe_interface *fcoe = port->fcoe;
+ struct fcoe_interface *fcoe = port->priv;
struct fcoe_interface *oldfcoe = NULL;
struct net_device *old_real_dev, *cur_real_dev;
u16 min_xid = FCOE_MIN_XID;
@@ -842,7 +830,7 @@ skip_oem:
static void fcoe_if_destroy(struct fc_lport *lport)
{
struct fcoe_port *port = lport_priv(lport);
- struct fcoe_interface *fcoe = port->fcoe;
+ struct fcoe_interface *fcoe = port->priv;
struct net_device *netdev = fcoe->netdev;
FCOE_NETDEV_DBG(netdev, "Destroying interface\n");
@@ -884,7 +872,6 @@ static void fcoe_if_destroy(struct fc_lport *lport)
/* Release the Scsi_Host */
scsi_host_put(lport->host);
- module_put(THIS_MODULE);
}
/**
@@ -939,8 +926,9 @@ static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
struct device *parent, int npiv)
{
struct net_device *netdev = fcoe->netdev;
- struct fc_lport *lport = NULL;
+ struct fc_lport *lport, *n_port;
struct fcoe_port *port;
+ struct Scsi_Host *shost;
int rc;
/*
* parent is only a vport if npiv is 1,
@@ -950,13 +938,11 @@ static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
FCOE_NETDEV_DBG(netdev, "Create Interface\n");
- if (!npiv) {
- lport = libfc_host_alloc(&fcoe_shost_template,
- sizeof(struct fcoe_port));
- } else {
- lport = libfc_vport_create(vport,
- sizeof(struct fcoe_port));
- }
+ if (!npiv)
+ lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port));
+ else
+ lport = libfc_vport_create(vport, sizeof(*port));
+
if (!lport) {
FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");
rc = -ENOMEM;
@@ -964,7 +950,9 @@ static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
}
port = lport_priv(lport);
port->lport = lport;
- port->fcoe = fcoe;
+ port->priv = fcoe;
+ port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH;
+ port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH;
INIT_WORK(&port->destroy_work, fcoe_destroy_work);
/* configure a fc_lport including the exchange manager */
@@ -1007,24 +995,27 @@ static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
goto out_lp_destroy;
}
- if (!npiv) {
- /*
- * fcoe_em_alloc() and fcoe_hostlist_add() both
- * need to be atomic with respect to other changes to the
- * hostlist since fcoe_em_alloc() looks for an existing EM
- * instance on host list updated by fcoe_hostlist_add().
- *
- * This is currently handled through the fcoe_config_mutex
- * begin held.
- */
-
+ /*
+ * fcoe_em_alloc() and fcoe_hostlist_add() both
+ * need to be atomic with respect to other changes to the
+ * hostlist since fcoe_em_alloc() looks for an existing EM
+ * instance on host list updated by fcoe_hostlist_add().
+ *
+ * This is currently handled through the fcoe_config_mutex
+ * begin held.
+ */
+ if (!npiv)
/* lport exch manager allocation */
rc = fcoe_em_config(lport);
- if (rc) {
- FCOE_NETDEV_DBG(netdev, "Could not configure the EM "
- "for the interface\n");
- goto out_lp_destroy;
- }
+ else {
+ shost = vport_to_shost(vport);
+ n_port = shost_priv(shost);
+ rc = fc_exch_mgr_list_clone(n_port, lport);
+ }
+
+ if (rc) {
+ FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n");
+ goto out_lp_destroy;
}
fcoe_interface_get(fcoe);
@@ -1048,11 +1039,12 @@ out:
static int __init fcoe_if_init(void)
{
/* attach to scsi transport */
- fcoe_transport_template = fc_attach_transport(&fcoe_transport_function);
- fcoe_vport_transport_template =
- fc_attach_transport(&fcoe_vport_transport_function);
+ fcoe_nport_scsi_transport =
+ fc_attach_transport(&fcoe_nport_fc_functions);
+ fcoe_vport_scsi_transport =
+ fc_attach_transport(&fcoe_vport_fc_functions);
- if (!fcoe_transport_template) {
+ if (!fcoe_nport_scsi_transport) {
printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");
return -ENODEV;
}
@@ -1069,10 +1061,10 @@ static int __init fcoe_if_init(void)
*/
int __exit fcoe_if_exit(void)
{
- fc_release_transport(fcoe_transport_template);
- fc_release_transport(fcoe_vport_transport_template);
- fcoe_transport_template = NULL;
- fcoe_vport_transport_template = NULL;
+ fc_release_transport(fcoe_nport_scsi_transport);
+ fc_release_transport(fcoe_vport_scsi_transport);
+ fcoe_nport_scsi_transport = NULL;
+ fcoe_vport_scsi_transport = NULL;
return 0;
}
@@ -1359,108 +1351,22 @@ err2:
}
/**
- * fcoe_start_io() - Start FCoE I/O
- * @skb: The packet to be transmitted
- *
- * This routine is called from the net device to start transmitting
- * FCoE packets.
- *
- * Returns: 0 for success
- */
-static inline int fcoe_start_io(struct sk_buff *skb)
-{
- struct sk_buff *nskb;
- int rc;
-
- nskb = skb_clone(skb, GFP_ATOMIC);
- rc = dev_queue_xmit(nskb);
- if (rc != 0)
- return rc;
- kfree_skb(skb);
- return 0;
-}
-
-/**
- * fcoe_get_paged_crc_eof() - Allocate a page to be used for the trailer CRC
+ * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC
* @skb: The packet to be transmitted
* @tlen: The total length of the trailer
*
- * This routine allocates a page for frame trailers. The page is re-used if
- * there is enough room left on it for the current trailer. If there isn't
- * enough buffer left a new page is allocated for the trailer. Reference to
- * the page from this function as well as the skbs using the page fragments
- * ensure that the page is freed at the appropriate time.
- *
* Returns: 0 for success
*/
-static int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen)
+static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen)
{
struct fcoe_percpu_s *fps;
- struct page *page;
+ int rc;
fps = &get_cpu_var(fcoe_percpu);
- page = fps->crc_eof_page;
- if (!page) {
- page = alloc_page(GFP_ATOMIC);
- if (!page) {
- put_cpu_var(fcoe_percpu);
- return -ENOMEM;
- }
- fps->crc_eof_page = page;
- fps->crc_eof_offset = 0;
- }
-
- get_page(page);
- skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page,
- fps->crc_eof_offset, tlen);
- skb->len += tlen;
- skb->data_len += tlen;
- skb->truesize += tlen;
- fps->crc_eof_offset += sizeof(struct fcoe_crc_eof);
-
- if (fps->crc_eof_offset >= PAGE_SIZE) {
- fps->crc_eof_page = NULL;
- fps->crc_eof_offset = 0;
- put_page(page);
- }
+ rc = fcoe_get_paged_crc_eof(skb, tlen, fps);
put_cpu_var(fcoe_percpu);
- return 0;
-}
-/**
- * fcoe_fc_crc() - Calculates the CRC for a given frame
- * @fp: The frame to be checksumed
- *
- * This uses crc32() routine to calculate the CRC for a frame
- *
- * Return: The 32 bit CRC value
- */
-u32 fcoe_fc_crc(struct fc_frame *fp)
-{
- struct sk_buff *skb = fp_skb(fp);
- struct skb_frag_struct *frag;
- unsigned char *data;
- unsigned long off, len, clen;
- u32 crc;
- unsigned i;
-
- crc = crc32(~0, skb->data, skb_headlen(skb));
-
- for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
- frag = &skb_shinfo(skb)->frags[i];
- off = frag->page_offset;
- len = frag->size;
- while (len > 0) {
- clen = min(len, PAGE_SIZE - (off & ~PAGE_MASK));
- data = kmap_atomic(frag->page + (off >> PAGE_SHIFT),
- KM_SKB_DATA_SOFTIRQ);
- crc = crc32(crc, data + (off & ~PAGE_MASK), clen);
- kunmap_atomic(data, KM_SKB_DATA_SOFTIRQ);
- off += clen;
- len -= clen;
- }
- }
- return crc;
+ return rc;
}
/**
@@ -1483,7 +1389,7 @@ int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp)
unsigned int tlen; /* trailer length */
unsigned int elen; /* eth header, may include vlan */
struct fcoe_port *port = lport_priv(lport);
- struct fcoe_interface *fcoe = port->fcoe;
+ struct fcoe_interface *fcoe = port->priv;
u8 sof, eof;
struct fcoe_hdr *hp;
@@ -1524,7 +1430,7 @@ int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp)
/* copy port crc and eof to the skb buff */
if (skb_is_nonlinear(skb)) {
skb_frag_t *frag;
- if (fcoe_get_paged_crc_eof(skb, tlen)) {
+ if (fcoe_alloc_paged_crc_eof(skb, tlen)) {
kfree_skb(skb);
return -ENOMEM;
}
@@ -1604,6 +1510,56 @@ static void fcoe_percpu_flush_done(struct sk_buff *skb)
}
/**
+ * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC
+ * @lport: The local port the frame was received on
+ * @fp: The received frame
+ *
+ * Return: 0 on passing filtering checks
+ */
+static inline int fcoe_filter_frames(struct fc_lport *lport,
+ struct fc_frame *fp)
+{
+ struct fcoe_interface *fcoe;
+ struct fc_frame_header *fh;
+ struct sk_buff *skb = (struct sk_buff *)fp;
+ struct fcoe_dev_stats *stats;
+
+ /*
+ * We only check CRC if no offload is available and if it is
+ * it's solicited data, in which case, the FCP layer would
+ * check it during the copy.
+ */
+ if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY)
+ fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
+ else
+ fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
+
+ fh = (struct fc_frame_header *) skb_transport_header(skb);
+ fh = fc_frame_header_get(fp);
+ if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP)
+ return 0;
+
+ fcoe = ((struct fcoe_port *)lport_priv(lport))->priv;
+ if (is_fip_mode(&fcoe->ctlr) && fc_frame_payload_op(fp) == ELS_LOGO &&
+ ntoh24(fh->fh_s_id) == FC_FID_FLOGI) {
+ FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n");
+ return -EINVAL;
+ }
+
+ if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) ||
+ le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) {
+ fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
+ return 0;
+ }
+
+ stats = per_cpu_ptr(lport->dev_stats, get_cpu());
+ stats->InvalidCRCCount++;
+ if (stats->InvalidCRCCount < 5)
+ printk(KERN_WARNING "fcoe: dropping frame with CRC error\n");
+ return -EINVAL;
+}
+
+/**
* fcoe_recv_frame() - process a single received frame
* @skb: frame to process
*/
@@ -1613,7 +1569,6 @@ static void fcoe_recv_frame(struct sk_buff *skb)
struct fc_lport *lport;
struct fcoe_rcv_info *fr;
struct fcoe_dev_stats *stats;
- struct fc_frame_header *fh;
struct fcoe_crc_eof crc_eof;
struct fc_frame *fp;
struct fcoe_port *port;
@@ -1644,7 +1599,6 @@ static void fcoe_recv_frame(struct sk_buff *skb)
* was done in fcoe_rcv already.
*/
hp = (struct fcoe_hdr *) skb_network_header(skb);
- fh = (struct fc_frame_header *) skb_transport_header(skb);
stats = per_cpu_ptr(lport->dev_stats, get_cpu());
if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
@@ -1677,35 +1631,11 @@ static void fcoe_recv_frame(struct sk_buff *skb)
if (pskb_trim(skb, fr_len))
goto drop;
- /*
- * We only check CRC if no offload is available and if it is
- * it's solicited data, in which case, the FCP layer would
- * check it during the copy.
- */
- if (lport->crc_offload &&
- skb->ip_summed == CHECKSUM_UNNECESSARY)
- fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
- else
- fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
-
- fh = fc_frame_header_get(fp);
- if ((fh->fh_r_ctl != FC_RCTL_DD_SOL_DATA ||
- fh->fh_type != FC_TYPE_FCP) &&
- (fr_flags(fp) & FCPHF_CRC_UNCHECKED)) {
- if (le32_to_cpu(fr_crc(fp)) !=
- ~crc32(~0, skb->data, fr_len)) {
- if (stats->InvalidCRCCount < 5)
- printk(KERN_WARNING "fcoe: dropping "
- "frame with CRC error\n");
- stats->InvalidCRCCount++;
- goto drop;
- }
- fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
+ if (!fcoe_filter_frames(lport, fp)) {
+ put_cpu();
+ fc_exch_recv(lport, fp);
+ return;
}
- put_cpu();
- fc_exch_recv(lport, fp);
- return;
-
drop:
stats->ErrorFrames++;
put_cpu();
@@ -1744,64 +1674,6 @@ int fcoe_percpu_receive_thread(void *arg)
}
/**
- * fcoe_check_wait_queue() - Attempt to clear the transmit backlog
- * @lport: The local port whose backlog is to be cleared
- *
- * This empties the wait_queue, dequeues the head of the wait_queue queue
- * and calls fcoe_start_io() for each packet. If all skb have been
- * transmitted it returns the qlen. If an error occurs it restores
- * wait_queue (to try again later) and returns -1.
- *
- * The wait_queue is used when the skb transmit fails. The failed skb
- * will go in the wait_queue which will be emptied by the timer function or
- * by the next skb transmit.
- */
-static void fcoe_check_wait_queue(struct fc_lport *lport, struct sk_buff *skb)
-{
- struct fcoe_port *port = lport_priv(lport);
- int rc;
-
- spin_lock_bh(&port->fcoe_pending_queue.lock);
-
- if (skb)
- __skb_queue_tail(&port->fcoe_pending_queue, skb);
-
- if (port->fcoe_pending_queue_active)
- goto out;
- port->fcoe_pending_queue_active = 1;
-
- while (port->fcoe_pending_queue.qlen) {
- /* keep qlen > 0 until fcoe_start_io succeeds */
- port->fcoe_pending_queue.qlen++;
- skb = __skb_dequeue(&port->fcoe_pending_queue);
-
- spin_unlock_bh(&port->fcoe_pending_queue.lock);
- rc = fcoe_start_io(skb);
- spin_lock_bh(&port->fcoe_pending_queue.lock);
-
- if (rc) {
- __skb_queue_head(&port->fcoe_pending_queue, skb);
- /* undo temporary increment above */
- port->fcoe_pending_queue.qlen--;
- break;
- }
- /* undo temporary increment above */
- port->fcoe_pending_queue.qlen--;
- }
-
- if (port->fcoe_pending_queue.qlen < FCOE_LOW_QUEUE_DEPTH)
- lport->qfull = 0;
- if (port->fcoe_pending_queue.qlen && !timer_pending(&port->timer))
- mod_timer(&port->timer, jiffies + 2);
- port->fcoe_pending_queue_active = 0;
-out:
- if (port->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH)
- lport->qfull = 1;
- spin_unlock_bh(&port->fcoe_pending_queue.lock);
- return;
-}
-
-/**
* fcoe_dev_setup() - Setup the link change notification interface
*/
static void fcoe_dev_setup(void)
@@ -1872,7 +1744,7 @@ static int fcoe_device_notification(struct notifier_block *notifier,
list_del(&fcoe->list);
port = lport_priv(fcoe->ctlr.lp);
fcoe_interface_cleanup(fcoe);
- schedule_work(&port->destroy_work);
+ queue_work(fcoe_wq, &port->destroy_work);
goto out;
break;
case NETDEV_FEAT_CHANGE:
@@ -1898,39 +1770,16 @@ out:
}
/**
- * fcoe_if_to_netdev() - Parse a name buffer to get a net device
- * @buffer: The name of the net device
- *
- * Returns: NULL or a ptr to net_device
- */
-static struct net_device *fcoe_if_to_netdev(const char *buffer)
-{
- char *cp;
- char ifname[IFNAMSIZ + 2];
-
- if (buffer) {
- strlcpy(ifname, buffer, IFNAMSIZ);
- cp = ifname + strlen(ifname);
- while (--cp >= ifname && *cp == '\n')
- *cp = '\0';
- return dev_get_by_name(&init_net, ifname);
- }
- return NULL;
-}
-
-/**
* fcoe_disable() - Disables a FCoE interface
- * @buffer: The name of the Ethernet interface to be disabled
- * @kp: The associated kernel parameter
+ * @netdev : The net_device object the Ethernet interface to create on
*
- * Called from sysfs.
+ * Called from fcoe transport.
*
* Returns: 0 for success
*/
-static int fcoe_disable(const char *buffer, struct kernel_param *kp)
+static int fcoe_disable(struct net_device *netdev)
{
struct fcoe_interface *fcoe;
- struct net_device *netdev;
int rc = 0;
mutex_lock(&fcoe_config_mutex);
@@ -1946,16 +1795,9 @@ static int fcoe_disable(const char *buffer, struct kernel_param *kp)
}
#endif
- netdev = fcoe_if_to_netdev(buffer);
- if (!netdev) {
- rc = -ENODEV;
- goto out_nodev;
- }
-
if (!rtnl_trylock()) {
- dev_put(netdev);
mutex_unlock(&fcoe_config_mutex);
- return restart_syscall();
+ return -ERESTARTSYS;
}
fcoe = fcoe_hostlist_lookup_port(netdev);
@@ -1967,7 +1809,6 @@ static int fcoe_disable(const char *buffer, struct kernel_param *kp)
} else
rc = -ENODEV;
- dev_put(netdev);
out_nodev:
mutex_unlock(&fcoe_config_mutex);
return rc;
@@ -1975,17 +1816,15 @@ out_nodev:
/**
* fcoe_enable() - Enables a FCoE interface
- * @buffer: The name of the Ethernet interface to be enabled
- * @kp: The associated kernel parameter
+ * @netdev : The net_device object the Ethernet interface to create on
*
- * Called from sysfs.
+ * Called from fcoe transport.
*
* Returns: 0 for success
*/
-static int fcoe_enable(const char *buffer, struct kernel_param *kp)
+static int fcoe_enable(struct net_device *netdev)
{
struct fcoe_interface *fcoe;
- struct net_device *netdev;
int rc = 0;
mutex_lock(&fcoe_config_mutex);
@@ -2000,17 +1839,9 @@ static int fcoe_enable(const char *buffer, struct kernel_param *kp)
goto out_nodev;
}
#endif
-
- netdev = fcoe_if_to_netdev(buffer);
- if (!netdev) {
- rc = -ENODEV;
- goto out_nodev;
- }
-
if (!rtnl_trylock()) {
- dev_put(netdev);
mutex_unlock(&fcoe_config_mutex);
- return restart_syscall();
+ return -ERESTARTSYS;
}
fcoe = fcoe_hostlist_lookup_port(netdev);
@@ -2021,7 +1852,6 @@ static int fcoe_enable(const char *buffer, struct kernel_param *kp)
else if (!fcoe_link_ok(fcoe->ctlr.lp))
fcoe_ctlr_link_up(&fcoe->ctlr);
- dev_put(netdev);
out_nodev:
mutex_unlock(&fcoe_config_mutex);
return rc;
@@ -2029,17 +1859,15 @@ out_nodev:
/**
* fcoe_destroy() - Destroy a FCoE interface
- * @buffer: The name of the Ethernet interface to be destroyed
- * @kp: The associated kernel parameter
+ * @netdev : The net_device object the Ethernet interface to create on
*
- * Called from sysfs.
+ * Called from fcoe transport
*
* Returns: 0 for success
*/
-static int fcoe_destroy(const char *buffer, struct kernel_param *kp)
+static int fcoe_destroy(struct net_device *netdev)
{
struct fcoe_interface *fcoe;
- struct net_device *netdev;
int rc = 0;
mutex_lock(&fcoe_config_mutex);
@@ -2054,32 +1882,21 @@ static int fcoe_destroy(const char *buffer, struct kernel_param *kp)
goto out_nodev;
}
#endif
-
- netdev = fcoe_if_to_netdev(buffer);
- if (!netdev) {
- rc = -ENODEV;
- goto out_nodev;
- }
-
if (!rtnl_trylock()) {
- dev_put(netdev);
mutex_unlock(&fcoe_config_mutex);
- return restart_syscall();
+ return -ERESTARTSYS;
}
fcoe = fcoe_hostlist_lookup_port(netdev);
if (!fcoe) {
rtnl_unlock();
rc = -ENODEV;
- goto out_putdev;
+ goto out_nodev;
}
fcoe_interface_cleanup(fcoe);
list_del(&fcoe->list);
/* RTNL mutex is dropped by fcoe_if_destroy */
fcoe_if_destroy(fcoe->ctlr.lp);
-
-out_putdev:
- dev_put(netdev);
out_nodev:
mutex_unlock(&fcoe_config_mutex);
return rc;
@@ -2102,27 +1919,39 @@ static void fcoe_destroy_work(struct work_struct *work)
}
/**
+ * fcoe_match() - Check if the FCoE is supported on the given netdevice
+ * @netdev : The net_device object the Ethernet interface to create on
+ *
+ * Called from fcoe transport.
+ *
+ * Returns: always returns true as this is the default FCoE transport,
+ * i.e., support all netdevs.
+ */
+static bool fcoe_match(struct net_device *netdev)
+{
+ return true;
+}
+
+/**
* fcoe_create() - Create a fcoe interface
- * @buffer: The name of the Ethernet interface to create on
- * @kp: The associated kernel param
+ * @netdev : The net_device object the Ethernet interface to create on
+ * @fip_mode: The FIP mode for this creation
*
- * Called from sysfs.
+ * Called from fcoe transport
*
* Returns: 0 for success
*/
-static int fcoe_create(const char *buffer, struct kernel_param *kp)
+static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode)
{
- enum fip_state fip_mode = (enum fip_state)(long)kp->arg;
int rc;
struct fcoe_interface *fcoe;
struct fc_lport *lport;
- struct net_device *netdev;
mutex_lock(&fcoe_config_mutex);
if (!rtnl_trylock()) {
mutex_unlock(&fcoe_config_mutex);
- return restart_syscall();
+ return -ERESTARTSYS;
}
#ifdef CONFIG_FCOE_MODULE
@@ -2133,31 +1962,20 @@ static int fcoe_create(const char *buffer, struct kernel_param *kp)
*/
if (THIS_MODULE->state != MODULE_STATE_LIVE) {
rc = -ENODEV;
- goto out_nomod;
- }
-#endif
-
- if (!try_module_get(THIS_MODULE)) {
- rc = -EINVAL;
- goto out_nomod;
- }
-
- netdev = fcoe_if_to_netdev(buffer);
- if (!netdev) {
- rc = -ENODEV;
goto out_nodev;
}
+#endif
/* look for existing lport */
if (fcoe_hostlist_lookup(netdev)) {
rc = -EEXIST;
- goto out_putdev;
+ goto out_nodev;
}
fcoe = fcoe_interface_create(netdev, fip_mode);
- if (!fcoe) {
- rc = -ENOMEM;
- goto out_putdev;
+ if (IS_ERR(fcoe)) {
+ rc = PTR_ERR(fcoe);
+ goto out_nodev;
}
lport = fcoe_if_create(fcoe, &netdev->dev, 0);
@@ -2186,18 +2004,13 @@ static int fcoe_create(const char *buffer, struct kernel_param *kp)
* should be holding a reference taken in fcoe_if_create().
*/
fcoe_interface_put(fcoe);
- dev_put(netdev);
rtnl_unlock();
mutex_unlock(&fcoe_config_mutex);
return 0;
out_free:
fcoe_interface_put(fcoe);
-out_putdev:
- dev_put(netdev);
out_nodev:
- module_put(THIS_MODULE);
-out_nomod:
rtnl_unlock();
mutex_unlock(&fcoe_config_mutex);
return rc;
@@ -2212,8 +2025,7 @@ out_nomod:
*/
int fcoe_link_speed_update(struct fc_lport *lport)
{
- struct fcoe_port *port = lport_priv(lport);
- struct net_device *netdev = port->fcoe->netdev;
+ struct net_device *netdev = fcoe_netdev(lport);
struct ethtool_cmd ecmd = { ETHTOOL_GSET };
if (!dev_ethtool_get_settings(netdev, &ecmd)) {
@@ -2244,8 +2056,7 @@ int fcoe_link_speed_update(struct fc_lport *lport)
*/
int fcoe_link_ok(struct fc_lport *lport)
{
- struct fcoe_port *port = lport_priv(lport);
- struct net_device *netdev = port->fcoe->netdev;
+ struct net_device *netdev = fcoe_netdev(lport);
if (netif_oper_up(netdev))
return 0;
@@ -2309,24 +2120,6 @@ void fcoe_percpu_clean(struct fc_lport *lport)
}
/**
- * fcoe_clean_pending_queue() - Dequeue a skb and free it
- * @lport: The local port to dequeue a skb on
- */
-void fcoe_clean_pending_queue(struct fc_lport *lport)
-{
- struct fcoe_port *port = lport_priv(lport);
- struct sk_buff *skb;
-
- spin_lock_bh(&port->fcoe_pending_queue.lock);
- while ((skb = __skb_dequeue(&port->fcoe_pending_queue)) != NULL) {
- spin_unlock_bh(&port->fcoe_pending_queue.lock);
- kfree_skb(skb);
- spin_lock_bh(&port->fcoe_pending_queue.lock);
- }
- spin_unlock_bh(&port->fcoe_pending_queue.lock);
-}
-
-/**
* fcoe_reset() - Reset a local port
* @shost: The SCSI host associated with the local port to be reset
*
@@ -2335,7 +2128,13 @@ void fcoe_clean_pending_queue(struct fc_lport *lport)
int fcoe_reset(struct Scsi_Host *shost)
{
struct fc_lport *lport = shost_priv(shost);
- fc_lport_reset(lport);
+ struct fcoe_port *port = lport_priv(lport);
+ struct fcoe_interface *fcoe = port->priv;
+
+ fcoe_ctlr_link_down(&fcoe->ctlr);
+ fcoe_clean_pending_queue(fcoe->ctlr.lp);
+ if (!fcoe_link_ok(fcoe->ctlr.lp))
+ fcoe_ctlr_link_up(&fcoe->ctlr);
return 0;
}
@@ -2393,12 +2192,24 @@ static int fcoe_hostlist_add(const struct fc_lport *lport)
fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport));
if (!fcoe) {
port = lport_priv(lport);
- fcoe = port->fcoe;
+ fcoe = port->priv;
list_add_tail(&fcoe->list, &fcoe_hostlist);
}
return 0;
}
+
+static struct fcoe_transport fcoe_sw_transport = {
+ .name = {FCOE_TRANSPORT_DEFAULT},
+ .attached = false,
+ .list = LIST_HEAD_INIT(fcoe_sw_transport.list),
+ .match = fcoe_match,
+ .create = fcoe_create,
+ .destroy = fcoe_destroy,
+ .enable = fcoe_enable,
+ .disable = fcoe_disable,
+};
+
/**
* fcoe_init() - Initialize fcoe.ko
*
@@ -2410,6 +2221,18 @@ static int __init fcoe_init(void)
unsigned int cpu;
int rc = 0;
+ fcoe_wq = alloc_workqueue("fcoe", 0, 0);
+ if (!fcoe_wq)
+ return -ENOMEM;
+
+ /* register as a fcoe transport */
+ rc = fcoe_transport_attach(&fcoe_sw_transport);
+ if (rc) {
+ printk(KERN_ERR "failed to register an fcoe transport, check "
+ "if libfcoe is loaded\n");
+ return rc;
+ }
+
mutex_lock(&fcoe_config_mutex);
for_each_possible_cpu(cpu) {
@@ -2440,6 +2263,7 @@ out_free:
fcoe_percpu_thread_destroy(cpu);
}
mutex_unlock(&fcoe_config_mutex);
+ destroy_workqueue(fcoe_wq);
return rc;
}
module_init(fcoe_init);
@@ -2465,7 +2289,7 @@ static void __exit fcoe_exit(void)
list_del(&fcoe->list);
port = lport_priv(fcoe->ctlr.lp);
fcoe_interface_cleanup(fcoe);
- schedule_work(&port->destroy_work);
+ queue_work(fcoe_wq, &port->destroy_work);
}
rtnl_unlock();
@@ -2476,16 +2300,21 @@ static void __exit fcoe_exit(void)
mutex_unlock(&fcoe_config_mutex);
- /* flush any asyncronous interface destroys,
- * this should happen after the netdev notifier is unregistered */
- flush_scheduled_work();
- /* That will flush out all the N_Ports on the hostlist, but now we
- * may have NPIV VN_Ports scheduled for destruction */
- flush_scheduled_work();
+ /*
+ * destroy_work's may be chained but destroy_workqueue()
+ * can take care of them. Just kill the fcoe_wq.
+ */
+ destroy_workqueue(fcoe_wq);
- /* detach from scsi transport
- * must happen after all destroys are done, therefor after the flush */
+ /*
+ * Detaching from the scsi transport must happen after all
+ * destroys are done on the fcoe_wq. destroy_workqueue will
+ * enusre the fcoe_wq is flushed.
+ */
fcoe_if_exit();
+
+ /* detach from fcoe transport */
+ fcoe_transport_detach(&fcoe_sw_transport);
}
module_exit(fcoe_exit);
@@ -2557,7 +2386,7 @@ static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did,
void *arg, u32 timeout)
{
struct fcoe_port *port = lport_priv(lport);
- struct fcoe_interface *fcoe = port->fcoe;
+ struct fcoe_interface *fcoe = port->priv;
struct fcoe_ctlr *fip = &fcoe->ctlr;
struct fc_frame_header *fh = fc_frame_header_get(fp);
@@ -2590,7 +2419,7 @@ static int fcoe_vport_create(struct fc_vport *vport, bool disabled)
struct Scsi_Host *shost = vport_to_shost(vport);
struct fc_lport *n_port = shost_priv(shost);
struct fcoe_port *port = lport_priv(n_port);
- struct fcoe_interface *fcoe = port->fcoe;
+ struct fcoe_interface *fcoe = port->priv;
struct net_device *netdev = fcoe->netdev;
struct fc_lport *vn_port;
@@ -2630,7 +2459,7 @@ static int fcoe_vport_destroy(struct fc_vport *vport)
mutex_lock(&n_port->lp_mutex);
list_del(&vn_port->list);
mutex_unlock(&n_port->lp_mutex);
- schedule_work(&port->destroy_work);
+ queue_work(fcoe_wq, &port->destroy_work);
return 0;
}
@@ -2734,7 +2563,7 @@ static void fcoe_set_port_id(struct fc_lport *lport,
u32 port_id, struct fc_frame *fp)
{
struct fcoe_port *port = lport_priv(lport);
- struct fcoe_interface *fcoe = port->fcoe;
+ struct fcoe_interface *fcoe = port->priv;
if (fp && fc_frame_payload_op(fp) == ELS_FLOGI)
fcoe_ctlr_recv_flogi(&fcoe->ctlr, lport, fp);
diff --git a/drivers/scsi/fcoe/fcoe.h b/drivers/scsi/fcoe/fcoe.h
index c69b2c56c2d1..408a6fd78fb4 100644
--- a/drivers/scsi/fcoe/fcoe.h
+++ b/drivers/scsi/fcoe/fcoe.h
@@ -24,7 +24,7 @@
#include <linux/kthread.h>
#define FCOE_MAX_QUEUE_DEPTH 256
-#define FCOE_LOW_QUEUE_DEPTH 32
+#define FCOE_MIN_QUEUE_DEPTH 32
#define FCOE_WORD_TO_BYTE 4
@@ -40,12 +40,6 @@
#define FCOE_MIN_XID 0x0000 /* the min xid supported by fcoe_sw */
#define FCOE_MAX_XID 0x0FFF /* the max xid supported by fcoe_sw */
-/*
- * Max MTU for FCoE: 14 (FCoE header) + 24 (FC header) + 2112 (max FC payload)
- * + 4 (FC CRC) + 4 (FCoE trailer) = 2158 bytes
- */
-#define FCOE_MTU 2158
-
unsigned int fcoe_debug_logging;
module_param_named(debug_logging, fcoe_debug_logging, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels");
@@ -71,21 +65,6 @@ do { \
netdev->name, ##args);)
/**
- * struct fcoe_percpu_s - The per-CPU context for FCoE receive threads
- * @thread: The thread context
- * @fcoe_rx_list: The queue of pending packets to process
- * @page: The memory page for calculating frame trailer CRCs
- * @crc_eof_offset: The offset into the CRC page pointing to available
- * memory for a new trailer
- */
-struct fcoe_percpu_s {
- struct task_struct *thread;
- struct sk_buff_head fcoe_rx_list;
- struct page *crc_eof_page;
- int crc_eof_offset;
-};
-
-/**
* struct fcoe_interface - A FCoE interface
* @list: Handle for a list of FCoE interfaces
* @netdev: The associated net device
@@ -108,30 +87,6 @@ struct fcoe_interface {
struct kref kref;
};
-/**
- * struct fcoe_port - The FCoE private structure
- * @fcoe: The associated fcoe interface
- * @lport: The associated local port
- * @fcoe_pending_queue: The pending Rx queue of skbs
- * @fcoe_pending_queue_active: Indicates if the pending queue is active
- * @timer: The queue timer
- * @destroy_work: Handle for work context
- * (to prevent RTNL deadlocks)
- * @data_srt_addr: Source address for data
- *
- * An instance of this structure is to be allocated along with the
- * Scsi_Host and libfc fc_lport structures.
- */
-struct fcoe_port {
- struct fcoe_interface *fcoe;
- struct fc_lport *lport;
- struct sk_buff_head fcoe_pending_queue;
- u8 fcoe_pending_queue_active;
- struct timer_list timer;
- struct work_struct destroy_work;
- u8 data_src_addr[ETH_ALEN];
-};
-
#define fcoe_from_ctlr(fip) container_of(fip, struct fcoe_interface, ctlr)
/**
@@ -140,7 +95,8 @@ struct fcoe_port {
*/
static inline struct net_device *fcoe_netdev(const struct fc_lport *lport)
{
- return ((struct fcoe_port *)lport_priv(lport))->fcoe->netdev;
+ return ((struct fcoe_interface *)
+ ((struct fcoe_port *)lport_priv(lport))->priv)->netdev;
}
#endif /* _FCOE_H_ */
diff --git a/drivers/scsi/fcoe/libfcoe.c b/drivers/scsi/fcoe/fcoe_ctlr.c
index 625c6be25396..c93f007e702f 100644
--- a/drivers/scsi/fcoe/libfcoe.c
+++ b/drivers/scsi/fcoe/fcoe_ctlr.c
@@ -44,9 +44,7 @@
#include <scsi/libfc.h>
#include <scsi/libfcoe.h>
-MODULE_AUTHOR("Open-FCoE.org");
-MODULE_DESCRIPTION("FIP discovery protocol support for FCoE HBAs");
-MODULE_LICENSE("GPL v2");
+#include "libfcoe.h"
#define FCOE_CTLR_MIN_FKA 500 /* min keep alive (mS) */
#define FCOE_CTLR_DEF_FKA FIP_DEF_FKA /* default keep alive (mS) */
@@ -66,31 +64,7 @@ static u8 fcoe_all_enode[ETH_ALEN] = FIP_ALL_ENODE_MACS;
static u8 fcoe_all_vn2vn[ETH_ALEN] = FIP_ALL_VN2VN_MACS;
static u8 fcoe_all_p2p[ETH_ALEN] = FIP_ALL_P2P_MACS;
-unsigned int libfcoe_debug_logging;
-module_param_named(debug_logging, libfcoe_debug_logging, int, S_IRUGO|S_IWUSR);
-MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels");
-
-#define LIBFCOE_LOGGING 0x01 /* General logging, not categorized */
-#define LIBFCOE_FIP_LOGGING 0x02 /* FIP logging */
-
-#define LIBFCOE_CHECK_LOGGING(LEVEL, CMD) \
-do { \
- if (unlikely(libfcoe_debug_logging & LEVEL)) \
- do { \
- CMD; \
- } while (0); \
-} while (0)
-
-#define LIBFCOE_DBG(fmt, args...) \
- LIBFCOE_CHECK_LOGGING(LIBFCOE_LOGGING, \
- printk(KERN_INFO "libfcoe: " fmt, ##args);)
-
-#define LIBFCOE_FIP_DBG(fip, fmt, args...) \
- LIBFCOE_CHECK_LOGGING(LIBFCOE_FIP_LOGGING, \
- printk(KERN_INFO "host%d: fip: " fmt, \
- (fip)->lp->host->host_no, ##args);)
-
-static const char *fcoe_ctlr_states[] = {
+static const char * const fcoe_ctlr_states[] = {
[FIP_ST_DISABLED] = "DISABLED",
[FIP_ST_LINK_WAIT] = "LINK_WAIT",
[FIP_ST_AUTO] = "AUTO",
@@ -308,8 +282,8 @@ static void fcoe_ctlr_solicit(struct fcoe_ctlr *fip, struct fcoe_fcf *fcf)
struct fip_mac_desc mac;
struct fip_wwn_desc wwnn;
struct fip_size_desc size;
- } __attribute__((packed)) desc;
- } __attribute__((packed)) *sol;
+ } __packed desc;
+ } __packed * sol;
u32 fcoe_size;
skb = dev_alloc_skb(sizeof(*sol));
@@ -456,7 +430,7 @@ static void fcoe_ctlr_send_keep_alive(struct fcoe_ctlr *fip,
struct ethhdr eth;
struct fip_header fip;
struct fip_mac_desc mac;
- } __attribute__((packed)) *kal;
+ } __packed * kal;
struct fip_vn_desc *vn;
u32 len;
struct fc_lport *lp;
@@ -527,7 +501,7 @@ static int fcoe_ctlr_encaps(struct fcoe_ctlr *fip, struct fc_lport *lport,
struct ethhdr eth;
struct fip_header fip;
struct fip_encaps encaps;
- } __attribute__((packed)) *cap;
+ } __packed * cap;
struct fc_frame_header *fh;
struct fip_mac_desc *mac;
struct fcoe_fcf *fcf;
@@ -1819,7 +1793,7 @@ static void fcoe_ctlr_vn_send(struct fcoe_ctlr *fip,
struct fip_mac_desc mac;
struct fip_wwn_desc wwnn;
struct fip_vn_desc vn;
- } __attribute__((packed)) *frame;
+ } __packed * frame;
struct fip_fc4_feat *ff;
struct fip_size_desc *size;
u32 fcp_feat;
diff --git a/drivers/scsi/fcoe/fcoe_transport.c b/drivers/scsi/fcoe/fcoe_transport.c
new file mode 100644
index 000000000000..258684101bfd
--- /dev/null
+++ b/drivers/scsi/fcoe/fcoe_transport.c
@@ -0,0 +1,770 @@
+/*
+ * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Maintained at www.Open-FCoE.org
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/netdevice.h>
+#include <linux/errno.h>
+#include <linux/crc32.h>
+#include <scsi/libfcoe.h>
+
+#include "libfcoe.h"
+
+MODULE_AUTHOR("Open-FCoE.org");
+MODULE_DESCRIPTION("FIP discovery protocol and FCoE transport for FCoE HBAs");
+MODULE_LICENSE("GPL v2");
+
+static int fcoe_transport_create(const char *, struct kernel_param *);
+static int fcoe_transport_destroy(const char *, struct kernel_param *);
+static int fcoe_transport_show(char *buffer, const struct kernel_param *kp);
+static struct fcoe_transport *fcoe_transport_lookup(struct net_device *device);
+static struct fcoe_transport *fcoe_netdev_map_lookup(struct net_device *device);
+static int fcoe_transport_enable(const char *, struct kernel_param *);
+static int fcoe_transport_disable(const char *, struct kernel_param *);
+static int libfcoe_device_notification(struct notifier_block *notifier,
+ ulong event, void *ptr);
+
+static LIST_HEAD(fcoe_transports);
+static DEFINE_MUTEX(ft_mutex);
+static LIST_HEAD(fcoe_netdevs);
+static DEFINE_MUTEX(fn_mutex);
+
+unsigned int libfcoe_debug_logging;
+module_param_named(debug_logging, libfcoe_debug_logging, int, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels");
+
+module_param_call(show, NULL, fcoe_transport_show, NULL, S_IRUSR);
+__MODULE_PARM_TYPE(show, "string");
+MODULE_PARM_DESC(show, " Show attached FCoE transports");
+
+module_param_call(create, fcoe_transport_create, NULL,
+ (void *)FIP_MODE_FABRIC, S_IWUSR);
+__MODULE_PARM_TYPE(create, "string");
+MODULE_PARM_DESC(create, " Creates fcoe instance on a ethernet interface");
+
+module_param_call(create_vn2vn, fcoe_transport_create, NULL,
+ (void *)FIP_MODE_VN2VN, S_IWUSR);
+__MODULE_PARM_TYPE(create_vn2vn, "string");
+MODULE_PARM_DESC(create_vn2vn, " Creates a VN_node to VN_node FCoE instance "
+ "on an Ethernet interface");
+
+module_param_call(destroy, fcoe_transport_destroy, NULL, NULL, S_IWUSR);
+__MODULE_PARM_TYPE(destroy, "string");
+MODULE_PARM_DESC(destroy, " Destroys fcoe instance on a ethernet interface");
+
+module_param_call(enable, fcoe_transport_enable, NULL, NULL, S_IWUSR);
+__MODULE_PARM_TYPE(enable, "string");
+MODULE_PARM_DESC(enable, " Enables fcoe on a ethernet interface.");
+
+module_param_call(disable, fcoe_transport_disable, NULL, NULL, S_IWUSR);
+__MODULE_PARM_TYPE(disable, "string");
+MODULE_PARM_DESC(disable, " Disables fcoe on a ethernet interface.");
+
+/* notification function for packets from net device */
+static struct notifier_block libfcoe_notifier = {
+ .notifier_call = libfcoe_device_notification,
+};
+
+/**
+ * fcoe_fc_crc() - Calculates the CRC for a given frame
+ * @fp: The frame to be checksumed
+ *
+ * This uses crc32() routine to calculate the CRC for a frame
+ *
+ * Return: The 32 bit CRC value
+ */
+u32 fcoe_fc_crc(struct fc_frame *fp)
+{
+ struct sk_buff *skb = fp_skb(fp);
+ struct skb_frag_struct *frag;
+ unsigned char *data;
+ unsigned long off, len, clen;
+ u32 crc;
+ unsigned i;
+
+ crc = crc32(~0, skb->data, skb_headlen(skb));
+
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
+ frag = &skb_shinfo(skb)->frags[i];
+ off = frag->page_offset;
+ len = frag->size;
+ while (len > 0) {
+ clen = min(len, PAGE_SIZE - (off & ~PAGE_MASK));
+ data = kmap_atomic(frag->page + (off >> PAGE_SHIFT),
+ KM_SKB_DATA_SOFTIRQ);
+ crc = crc32(crc, data + (off & ~PAGE_MASK), clen);
+ kunmap_atomic(data, KM_SKB_DATA_SOFTIRQ);
+ off += clen;
+ len -= clen;
+ }
+ }
+ return crc;
+}
+EXPORT_SYMBOL_GPL(fcoe_fc_crc);
+
+/**
+ * fcoe_start_io() - Start FCoE I/O
+ * @skb: The packet to be transmitted
+ *
+ * This routine is called from the net device to start transmitting
+ * FCoE packets.
+ *
+ * Returns: 0 for success
+ */
+int fcoe_start_io(struct sk_buff *skb)
+{
+ struct sk_buff *nskb;
+ int rc;
+
+ nskb = skb_clone(skb, GFP_ATOMIC);
+ if (!nskb)
+ return -ENOMEM;
+ rc = dev_queue_xmit(nskb);
+ if (rc != 0)
+ return rc;
+ kfree_skb(skb);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(fcoe_start_io);
+
+
+/**
+ * fcoe_clean_pending_queue() - Dequeue a skb and free it
+ * @lport: The local port to dequeue a skb on
+ */
+void fcoe_clean_pending_queue(struct fc_lport *lport)
+{
+ struct fcoe_port *port = lport_priv(lport);
+ struct sk_buff *skb;
+
+ spin_lock_bh(&port->fcoe_pending_queue.lock);
+ while ((skb = __skb_dequeue(&port->fcoe_pending_queue)) != NULL) {
+ spin_unlock_bh(&port->fcoe_pending_queue.lock);
+ kfree_skb(skb);
+ spin_lock_bh(&port->fcoe_pending_queue.lock);
+ }
+ spin_unlock_bh(&port->fcoe_pending_queue.lock);
+}
+EXPORT_SYMBOL_GPL(fcoe_clean_pending_queue);
+
+/**
+ * fcoe_check_wait_queue() - Attempt to clear the transmit backlog
+ * @lport: The local port whose backlog is to be cleared
+ *
+ * This empties the wait_queue, dequeues the head of the wait_queue queue
+ * and calls fcoe_start_io() for each packet. If all skb have been
+ * transmitted it returns the qlen. If an error occurs it restores
+ * wait_queue (to try again later) and returns -1.
+ *
+ * The wait_queue is used when the skb transmit fails. The failed skb
+ * will go in the wait_queue which will be emptied by the timer function or
+ * by the next skb transmit.
+ */
+void fcoe_check_wait_queue(struct fc_lport *lport, struct sk_buff *skb)
+{
+ struct fcoe_port *port = lport_priv(lport);
+ int rc;
+
+ spin_lock_bh(&port->fcoe_pending_queue.lock);
+
+ if (skb)
+ __skb_queue_tail(&port->fcoe_pending_queue, skb);
+
+ if (port->fcoe_pending_queue_active)
+ goto out;
+ port->fcoe_pending_queue_active = 1;
+
+ while (port->fcoe_pending_queue.qlen) {
+ /* keep qlen > 0 until fcoe_start_io succeeds */
+ port->fcoe_pending_queue.qlen++;
+ skb = __skb_dequeue(&port->fcoe_pending_queue);
+
+ spin_unlock_bh(&port->fcoe_pending_queue.lock);
+ rc = fcoe_start_io(skb);
+ spin_lock_bh(&port->fcoe_pending_queue.lock);
+
+ if (rc) {
+ __skb_queue_head(&port->fcoe_pending_queue, skb);
+ /* undo temporary increment above */
+ port->fcoe_pending_queue.qlen--;
+ break;
+ }
+ /* undo temporary increment above */
+ port->fcoe_pending_queue.qlen--;
+ }
+
+ if (port->fcoe_pending_queue.qlen < port->min_queue_depth)
+ lport->qfull = 0;
+ if (port->fcoe_pending_queue.qlen && !timer_pending(&port->timer))
+ mod_timer(&port->timer, jiffies + 2);
+ port->fcoe_pending_queue_active = 0;
+out:
+ if (port->fcoe_pending_queue.qlen > port->max_queue_depth)
+ lport->qfull = 1;
+ spin_unlock_bh(&port->fcoe_pending_queue.lock);
+}
+EXPORT_SYMBOL_GPL(fcoe_check_wait_queue);
+
+/**
+ * fcoe_queue_timer() - The fcoe queue timer
+ * @lport: The local port
+ *
+ * Calls fcoe_check_wait_queue on timeout
+ */
+void fcoe_queue_timer(ulong lport)
+{
+ fcoe_check_wait_queue((struct fc_lport *)lport, NULL);
+}
+EXPORT_SYMBOL_GPL(fcoe_queue_timer);
+
+/**
+ * fcoe_get_paged_crc_eof() - Allocate a page to be used for the trailer CRC
+ * @skb: The packet to be transmitted
+ * @tlen: The total length of the trailer
+ * @fps: The fcoe context
+ *
+ * This routine allocates a page for frame trailers. The page is re-used if
+ * there is enough room left on it for the current trailer. If there isn't
+ * enough buffer left a new page is allocated for the trailer. Reference to
+ * the page from this function as well as the skbs using the page fragments
+ * ensure that the page is freed at the appropriate time.
+ *
+ * Returns: 0 for success
+ */
+int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen,
+ struct fcoe_percpu_s *fps)
+{
+ struct page *page;
+
+ page = fps->crc_eof_page;
+ if (!page) {
+ page = alloc_page(GFP_ATOMIC);
+ if (!page)
+ return -ENOMEM;
+
+ fps->crc_eof_page = page;
+ fps->crc_eof_offset = 0;
+ }
+
+ get_page(page);
+ skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page,
+ fps->crc_eof_offset, tlen);
+ skb->len += tlen;
+ skb->data_len += tlen;
+ skb->truesize += tlen;
+ fps->crc_eof_offset += sizeof(struct fcoe_crc_eof);
+
+ if (fps->crc_eof_offset >= PAGE_SIZE) {
+ fps->crc_eof_page = NULL;
+ fps->crc_eof_offset = 0;
+ put_page(page);
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(fcoe_get_paged_crc_eof);
+
+/**
+ * fcoe_transport_lookup - find an fcoe transport that matches a netdev
+ * @netdev: The netdev to look for from all attached transports
+ *
+ * Returns : ptr to the fcoe transport that supports this netdev or NULL
+ * if not found.
+ *
+ * The ft_mutex should be held when this is called
+ */
+static struct fcoe_transport *fcoe_transport_lookup(struct net_device *netdev)
+{
+ struct fcoe_transport *ft = NULL;
+
+ list_for_each_entry(ft, &fcoe_transports, list)
+ if (ft->match && ft->match(netdev))
+ return ft;
+ return NULL;
+}
+
+/**
+ * fcoe_transport_attach - Attaches an FCoE transport
+ * @ft: The fcoe transport to be attached
+ *
+ * Returns : 0 for success
+ */
+int fcoe_transport_attach(struct fcoe_transport *ft)
+{
+ int rc = 0;
+
+ mutex_lock(&ft_mutex);
+ if (ft->attached) {
+ LIBFCOE_TRANSPORT_DBG("transport %s already attached\n",
+ ft->name);
+ rc = -EEXIST;
+ goto out_attach;
+ }
+
+ /* Add default transport to the tail */
+ if (strcmp(ft->name, FCOE_TRANSPORT_DEFAULT))
+ list_add(&ft->list, &fcoe_transports);
+ else
+ list_add_tail(&ft->list, &fcoe_transports);
+
+ ft->attached = true;
+ LIBFCOE_TRANSPORT_DBG("attaching transport %s\n", ft->name);
+
+out_attach:
+ mutex_unlock(&ft_mutex);
+ return rc;
+}
+EXPORT_SYMBOL(fcoe_transport_attach);
+
+/**
+ * fcoe_transport_attach - Detaches an FCoE transport
+ * @ft: The fcoe transport to be attached
+ *
+ * Returns : 0 for success
+ */
+int fcoe_transport_detach(struct fcoe_transport *ft)
+{
+ int rc = 0;
+
+ mutex_lock(&ft_mutex);
+ if (!ft->attached) {
+ LIBFCOE_TRANSPORT_DBG("transport %s already detached\n",
+ ft->name);
+ rc = -ENODEV;
+ goto out_attach;
+ }
+
+ list_del(&ft->list);
+ ft->attached = false;
+ LIBFCOE_TRANSPORT_DBG("detaching transport %s\n", ft->name);
+
+out_attach:
+ mutex_unlock(&ft_mutex);
+ return rc;
+
+}
+EXPORT_SYMBOL(fcoe_transport_detach);
+
+static int fcoe_transport_show(char *buffer, const struct kernel_param *kp)
+{
+ int i, j;
+ struct fcoe_transport *ft = NULL;
+
+ i = j = sprintf(buffer, "Attached FCoE transports:");
+ mutex_lock(&ft_mutex);
+ list_for_each_entry(ft, &fcoe_transports, list) {
+ i += snprintf(&buffer[i], IFNAMSIZ, "%s ", ft->name);
+ if (i >= PAGE_SIZE)
+ break;
+ }
+ mutex_unlock(&ft_mutex);
+ if (i == j)
+ i += snprintf(&buffer[i], IFNAMSIZ, "none");
+ return i;
+}
+
+static int __init fcoe_transport_init(void)
+{
+ register_netdevice_notifier(&libfcoe_notifier);
+ return 0;
+}
+
+static int __exit fcoe_transport_exit(void)
+{
+ struct fcoe_transport *ft;
+
+ unregister_netdevice_notifier(&libfcoe_notifier);
+ mutex_lock(&ft_mutex);
+ list_for_each_entry(ft, &fcoe_transports, list)
+ printk(KERN_ERR "FCoE transport %s is still attached!\n",
+ ft->name);
+ mutex_unlock(&ft_mutex);
+ return 0;
+}
+
+
+static int fcoe_add_netdev_mapping(struct net_device *netdev,
+ struct fcoe_transport *ft)
+{
+ struct fcoe_netdev_mapping *nm;
+
+ nm = kmalloc(sizeof(*nm), GFP_KERNEL);
+ if (!nm) {
+ printk(KERN_ERR "Unable to allocate netdev_mapping");
+ return -ENOMEM;
+ }
+
+ nm->netdev = netdev;
+ nm->ft = ft;
+
+ mutex_lock(&fn_mutex);
+ list_add(&nm->list, &fcoe_netdevs);
+ mutex_unlock(&fn_mutex);
+ return 0;
+}
+
+
+static void fcoe_del_netdev_mapping(struct net_device *netdev)
+{
+ struct fcoe_netdev_mapping *nm = NULL, *tmp;
+
+ mutex_lock(&fn_mutex);
+ list_for_each_entry_safe(nm, tmp, &fcoe_netdevs, list) {
+ if (nm->netdev == netdev) {
+ list_del(&nm->list);
+ kfree(nm);
+ mutex_unlock(&fn_mutex);
+ return;
+ }
+ }
+ mutex_unlock(&fn_mutex);
+}
+
+
+/**
+ * fcoe_netdev_map_lookup - find the fcoe transport that matches the netdev on which
+ * it was created
+ *
+ * Returns : ptr to the fcoe transport that supports this netdev or NULL
+ * if not found.
+ *
+ * The ft_mutex should be held when this is called
+ */
+static struct fcoe_transport *fcoe_netdev_map_lookup(struct net_device *netdev)
+{
+ struct fcoe_transport *ft = NULL;
+ struct fcoe_netdev_mapping *nm;
+
+ mutex_lock(&fn_mutex);
+ list_for_each_entry(nm, &fcoe_netdevs, list) {
+ if (netdev == nm->netdev) {
+ ft = nm->ft;
+ mutex_unlock(&fn_mutex);
+ return ft;
+ }
+ }
+
+ mutex_unlock(&fn_mutex);
+ return NULL;
+}
+
+/**
+ * fcoe_if_to_netdev() - Parse a name buffer to get a net device
+ * @buffer: The name of the net device
+ *
+ * Returns: NULL or a ptr to net_device
+ */
+static struct net_device *fcoe_if_to_netdev(const char *buffer)
+{
+ char *cp;
+ char ifname[IFNAMSIZ + 2];
+
+ if (buffer) {
+ strlcpy(ifname, buffer, IFNAMSIZ);
+ cp = ifname + strlen(ifname);
+ while (--cp >= ifname && *cp == '\n')
+ *cp = '\0';
+ return dev_get_by_name(&init_net, ifname);
+ }
+ return NULL;
+}
+
+/**
+ * libfcoe_device_notification() - Handler for net device events
+ * @notifier: The context of the notification
+ * @event: The type of event
+ * @ptr: The net device that the event was on
+ *
+ * This function is called by the Ethernet driver in case of link change event.
+ *
+ * Returns: 0 for success
+ */
+static int libfcoe_device_notification(struct notifier_block *notifier,
+ ulong event, void *ptr)
+{
+ struct net_device *netdev = ptr;
+
+ switch (event) {
+ case NETDEV_UNREGISTER:
+ printk(KERN_ERR "libfcoe_device_notification: NETDEV_UNREGISTER %s\n",
+ netdev->name);
+ fcoe_del_netdev_mapping(netdev);
+ break;
+ }
+ return NOTIFY_OK;
+}
+
+
+/**
+ * fcoe_transport_create() - Create a fcoe interface
+ * @buffer: The name of the Ethernet interface to create on
+ * @kp: The associated kernel param
+ *
+ * Called from sysfs. This holds the ft_mutex while calling the
+ * registered fcoe transport's create function.
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_transport_create(const char *buffer, struct kernel_param *kp)
+{
+ int rc = -ENODEV;
+ struct net_device *netdev = NULL;
+ struct fcoe_transport *ft = NULL;
+ enum fip_state fip_mode = (enum fip_state)(long)kp->arg;
+
+ if (!mutex_trylock(&ft_mutex))
+ return restart_syscall();
+
+#ifdef CONFIG_LIBFCOE_MODULE
+ /*
+ * Make sure the module has been initialized, and is not about to be
+ * removed. Module parameter sysfs files are writable before the
+ * module_init function is called and after module_exit.
+ */
+ if (THIS_MODULE->state != MODULE_STATE_LIVE)
+ goto out_nodev;
+#endif
+
+ netdev = fcoe_if_to_netdev(buffer);
+ if (!netdev) {
+ LIBFCOE_TRANSPORT_DBG("Invalid device %s.\n", buffer);
+ goto out_nodev;
+ }
+
+ ft = fcoe_netdev_map_lookup(netdev);
+ if (ft) {
+ LIBFCOE_TRANSPORT_DBG("transport %s already has existing "
+ "FCoE instance on %s.\n",
+ ft->name, netdev->name);
+ rc = -EEXIST;
+ goto out_putdev;
+ }
+
+ ft = fcoe_transport_lookup(netdev);
+ if (!ft) {
+ LIBFCOE_TRANSPORT_DBG("no FCoE transport found for %s.\n",
+ netdev->name);
+ goto out_putdev;
+ }
+
+ rc = fcoe_add_netdev_mapping(netdev, ft);
+ if (rc) {
+ LIBFCOE_TRANSPORT_DBG("failed to add new netdev mapping "
+ "for FCoE transport %s for %s.\n",
+ ft->name, netdev->name);
+ goto out_putdev;
+ }
+
+ /* pass to transport create */
+ rc = ft->create ? ft->create(netdev, fip_mode) : -ENODEV;
+ if (rc)
+ fcoe_del_netdev_mapping(netdev);
+
+ LIBFCOE_TRANSPORT_DBG("transport %s %s to create fcoe on %s.\n",
+ ft->name, (rc) ? "failed" : "succeeded",
+ netdev->name);
+
+out_putdev:
+ dev_put(netdev);
+out_nodev:
+ mutex_unlock(&ft_mutex);
+ if (rc == -ERESTARTSYS)
+ return restart_syscall();
+ else
+ return rc;
+}
+
+/**
+ * fcoe_transport_destroy() - Destroy a FCoE interface
+ * @buffer: The name of the Ethernet interface to be destroyed
+ * @kp: The associated kernel parameter
+ *
+ * Called from sysfs. This holds the ft_mutex while calling the
+ * registered fcoe transport's destroy function.
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_transport_destroy(const char *buffer, struct kernel_param *kp)
+{
+ int rc = -ENODEV;
+ struct net_device *netdev = NULL;
+ struct fcoe_transport *ft = NULL;
+
+ if (!mutex_trylock(&ft_mutex))
+ return restart_syscall();
+
+#ifdef CONFIG_LIBFCOE_MODULE
+ /*
+ * Make sure the module has been initialized, and is not about to be
+ * removed. Module parameter sysfs files are writable before the
+ * module_init function is called and after module_exit.
+ */
+ if (THIS_MODULE->state != MODULE_STATE_LIVE)
+ goto out_nodev;
+#endif
+
+ netdev = fcoe_if_to_netdev(buffer);
+ if (!netdev) {
+ LIBFCOE_TRANSPORT_DBG("invalid device %s.\n", buffer);
+ goto out_nodev;
+ }
+
+ ft = fcoe_netdev_map_lookup(netdev);
+ if (!ft) {
+ LIBFCOE_TRANSPORT_DBG("no FCoE transport found for %s.\n",
+ netdev->name);
+ goto out_putdev;
+ }
+
+ /* pass to transport destroy */
+ rc = ft->destroy ? ft->destroy(netdev) : -ENODEV;
+ fcoe_del_netdev_mapping(netdev);
+ LIBFCOE_TRANSPORT_DBG("transport %s %s to destroy fcoe on %s.\n",
+ ft->name, (rc) ? "failed" : "succeeded",
+ netdev->name);
+
+out_putdev:
+ dev_put(netdev);
+out_nodev:
+ mutex_unlock(&ft_mutex);
+
+ if (rc == -ERESTARTSYS)
+ return restart_syscall();
+ else
+ return rc;
+}
+
+/**
+ * fcoe_transport_disable() - Disables a FCoE interface
+ * @buffer: The name of the Ethernet interface to be disabled
+ * @kp: The associated kernel parameter
+ *
+ * Called from sysfs.
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_transport_disable(const char *buffer, struct kernel_param *kp)
+{
+ int rc = -ENODEV;
+ struct net_device *netdev = NULL;
+ struct fcoe_transport *ft = NULL;
+
+ if (!mutex_trylock(&ft_mutex))
+ return restart_syscall();
+
+#ifdef CONFIG_LIBFCOE_MODULE
+ /*
+ * Make sure the module has been initialized, and is not about to be
+ * removed. Module parameter sysfs files are writable before the
+ * module_init function is called and after module_exit.
+ */
+ if (THIS_MODULE->state != MODULE_STATE_LIVE)
+ goto out_nodev;
+#endif
+
+ netdev = fcoe_if_to_netdev(buffer);
+ if (!netdev)
+ goto out_nodev;
+
+ ft = fcoe_netdev_map_lookup(netdev);
+ if (!ft)
+ goto out_putdev;
+
+ rc = ft->disable ? ft->disable(netdev) : -ENODEV;
+
+out_putdev:
+ dev_put(netdev);
+out_nodev:
+ mutex_unlock(&ft_mutex);
+
+ if (rc == -ERESTARTSYS)
+ return restart_syscall();
+ else
+ return rc;
+}
+
+/**
+ * fcoe_transport_enable() - Enables a FCoE interface
+ * @buffer: The name of the Ethernet interface to be enabled
+ * @kp: The associated kernel parameter
+ *
+ * Called from sysfs.
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_transport_enable(const char *buffer, struct kernel_param *kp)
+{
+ int rc = -ENODEV;
+ struct net_device *netdev = NULL;
+ struct fcoe_transport *ft = NULL;
+
+ if (!mutex_trylock(&ft_mutex))
+ return restart_syscall();
+
+#ifdef CONFIG_LIBFCOE_MODULE
+ /*
+ * Make sure the module has been initialized, and is not about to be
+ * removed. Module parameter sysfs files are writable before the
+ * module_init function is called and after module_exit.
+ */
+ if (THIS_MODULE->state != MODULE_STATE_LIVE)
+ goto out_nodev;
+#endif
+
+ netdev = fcoe_if_to_netdev(buffer);
+ if (!netdev)
+ goto out_nodev;
+
+ ft = fcoe_netdev_map_lookup(netdev);
+ if (!ft)
+ goto out_putdev;
+
+ rc = ft->enable ? ft->enable(netdev) : -ENODEV;
+
+out_putdev:
+ dev_put(netdev);
+out_nodev:
+ mutex_unlock(&ft_mutex);
+ if (rc == -ERESTARTSYS)
+ return restart_syscall();
+ else
+ return rc;
+}
+
+/**
+ * libfcoe_init() - Initialization routine for libfcoe.ko
+ */
+static int __init libfcoe_init(void)
+{
+ fcoe_transport_init();
+
+ return 0;
+}
+module_init(libfcoe_init);
+
+/**
+ * libfcoe_exit() - Tear down libfcoe.ko
+ */
+static void __exit libfcoe_exit(void)
+{
+ fcoe_transport_exit();
+}
+module_exit(libfcoe_exit);
diff --git a/drivers/scsi/fcoe/libfcoe.h b/drivers/scsi/fcoe/libfcoe.h
new file mode 100644
index 000000000000..6af5fc3a17d8
--- /dev/null
+++ b/drivers/scsi/fcoe/libfcoe.h
@@ -0,0 +1,31 @@
+#ifndef _FCOE_LIBFCOE_H_
+#define _FCOE_LIBFCOE_H_
+
+extern unsigned int libfcoe_debug_logging;
+#define LIBFCOE_LOGGING 0x01 /* General logging, not categorized */
+#define LIBFCOE_FIP_LOGGING 0x02 /* FIP logging */
+#define LIBFCOE_TRANSPORT_LOGGING 0x04 /* FCoE transport logging */
+
+#define LIBFCOE_CHECK_LOGGING(LEVEL, CMD) \
+do { \
+ if (unlikely(libfcoe_debug_logging & LEVEL)) \
+ do { \
+ CMD; \
+ } while (0); \
+} while (0)
+
+#define LIBFCOE_DBG(fmt, args...) \
+ LIBFCOE_CHECK_LOGGING(LIBFCOE_LOGGING, \
+ printk(KERN_INFO "libfcoe: " fmt, ##args);)
+
+#define LIBFCOE_FIP_DBG(fip, fmt, args...) \
+ LIBFCOE_CHECK_LOGGING(LIBFCOE_FIP_LOGGING, \
+ printk(KERN_INFO "host%d: fip: " fmt, \
+ (fip)->lp->host->host_no, ##args);)
+
+#define LIBFCOE_TRANSPORT_DBG(fmt, args...) \
+ LIBFCOE_CHECK_LOGGING(LIBFCOE_TRANSPORT_LOGGING, \
+ printk(KERN_INFO "%s: " fmt, \
+ __func__, ##args);)
+
+#endif /* _FCOE_LIBFCOE_H_ */
generated by cgit v1.2.3 (git 2.0.4) at 2024-05-23 10:04:56 +0000