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path: root/drivers/block/aoe/aoecmd.c
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Diffstat (limited to 'drivers/block/aoe/aoecmd.c')
-rw-r--r--drivers/block/aoe/aoecmd.c177
1 files changed, 119 insertions, 58 deletions
diff --git a/drivers/block/aoe/aoecmd.c b/drivers/block/aoe/aoecmd.c
index 4ab01ce5cf3..150eb78cd5a 100644
--- a/drivers/block/aoe/aoecmd.c
+++ b/drivers/block/aoe/aoecmd.c
@@ -8,6 +8,7 @@
#include <linux/blkdev.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
+#include <linux/genhd.h>
#include <asm/unaligned.h>
#include "aoe.h"
@@ -189,12 +190,67 @@ aoecmd_ata_rw(struct aoedev *d, struct frame *f)
}
}
+/* some callers cannot sleep, and they can call this function,
+ * transmitting the packets later, when interrupts are on
+ */
+static struct sk_buff *
+aoecmd_cfg_pkts(ushort aoemajor, unsigned char aoeminor, struct sk_buff **tail)
+{
+ struct aoe_hdr *h;
+ struct aoe_cfghdr *ch;
+ struct sk_buff *skb, *sl, *sl_tail;
+ struct net_device *ifp;
+
+ sl = sl_tail = NULL;
+
+ read_lock(&dev_base_lock);
+ for (ifp = dev_base; ifp; dev_put(ifp), ifp = ifp->next) {
+ dev_hold(ifp);
+ if (!is_aoe_netif(ifp))
+ continue;
+
+ skb = new_skb(ifp, sizeof *h + sizeof *ch);
+ if (skb == NULL) {
+ printk(KERN_INFO "aoe: aoecmd_cfg: skb alloc failure\n");
+ continue;
+ }
+ if (sl_tail == NULL)
+ sl_tail = skb;
+ h = (struct aoe_hdr *) skb->mac.raw;
+ memset(h, 0, sizeof *h + sizeof *ch);
+
+ memset(h->dst, 0xff, sizeof h->dst);
+ memcpy(h->src, ifp->dev_addr, sizeof h->src);
+ h->type = __constant_cpu_to_be16(ETH_P_AOE);
+ h->verfl = AOE_HVER;
+ h->major = cpu_to_be16(aoemajor);
+ h->minor = aoeminor;
+ h->cmd = AOECMD_CFG;
+
+ skb->next = sl;
+ sl = skb;
+ }
+ read_unlock(&dev_base_lock);
+
+ if (tail != NULL)
+ *tail = sl_tail;
+ return sl;
+}
+
/* enters with d->lock held */
void
aoecmd_work(struct aoedev *d)
{
struct frame *f;
struct buf *buf;
+
+ if (d->flags & DEVFL_PAUSE) {
+ if (!aoedev_isbusy(d))
+ d->sendq_hd = aoecmd_cfg_pkts(d->aoemajor,
+ d->aoeminor, &d->sendq_tl);
+ return;
+ }
+
loop:
f = getframe(d, FREETAG);
if (f == NULL)
@@ -306,6 +362,37 @@ tdie: spin_unlock_irqrestore(&d->lock, flags);
aoenet_xmit(sl);
}
+/* this function performs work that has been deferred until sleeping is OK
+ */
+void
+aoecmd_sleepwork(void *vp)
+{
+ struct aoedev *d = (struct aoedev *) vp;
+
+ if (d->flags & DEVFL_GDALLOC)
+ aoeblk_gdalloc(d);
+
+ if (d->flags & DEVFL_NEWSIZE) {
+ struct block_device *bd;
+ unsigned long flags;
+ u64 ssize;
+
+ ssize = d->gd->capacity;
+ bd = bdget_disk(d->gd, 0);
+
+ if (bd) {
+ mutex_lock(&bd->bd_inode->i_mutex);
+ i_size_write(bd->bd_inode, (loff_t)ssize<<9);
+ mutex_unlock(&bd->bd_inode->i_mutex);
+ bdput(bd);
+ }
+ spin_lock_irqsave(&d->lock, flags);
+ d->flags |= DEVFL_UP;
+ d->flags &= ~DEVFL_NEWSIZE;
+ spin_unlock_irqrestore(&d->lock, flags);
+ }
+}
+
static void
ataid_complete(struct aoedev *d, unsigned char *id)
{
@@ -340,21 +427,29 @@ ataid_complete(struct aoedev *d, unsigned char *id)
d->geo.heads = le16_to_cpu(get_unaligned((__le16 *) &id[55<<1]));
d->geo.sectors = le16_to_cpu(get_unaligned((__le16 *) &id[56<<1]));
}
+
+ if (d->ssize != ssize)
+ printk(KERN_INFO "aoe: %012llx e%lu.%lu v%04x has %llu "
+ "sectors\n", (unsigned long long)mac_addr(d->addr),
+ d->aoemajor, d->aoeminor,
+ d->fw_ver, (long long)ssize);
d->ssize = ssize;
d->geo.start = 0;
if (d->gd != NULL) {
d->gd->capacity = ssize;
- d->flags |= DEVFL_UP;
- return;
- }
- if (d->flags & DEVFL_WORKON) {
- printk(KERN_INFO "aoe: ataid_complete: can't schedule work, it's already on! "
- "(This really shouldn't happen).\n");
- return;
+ d->flags |= DEVFL_NEWSIZE;
+ } else {
+ if (d->flags & DEVFL_GDALLOC) {
+ printk(KERN_INFO "aoe: %s: %s e%lu.%lu, %s\n",
+ __FUNCTION__,
+ "can't schedule work for",
+ d->aoemajor, d->aoeminor,
+ "it's already on! (This really shouldn't happen).\n");
+ return;
+ }
+ d->flags |= DEVFL_GDALLOC;
}
- INIT_WORK(&d->work, aoeblk_gdalloc, d);
schedule_work(&d->work);
- d->flags |= DEVFL_WORKON;
}
static void
@@ -452,7 +547,7 @@ aoecmd_ata_rsp(struct sk_buff *skb)
return;
}
ataid_complete(d, (char *) (ahin+1));
- /* d->flags |= DEVFL_WC_UPDATE; */
+ d->flags &= ~DEVFL_PAUSE;
break;
default:
printk(KERN_INFO "aoe: aoecmd_ata_rsp: unrecognized "
@@ -485,51 +580,19 @@ aoecmd_ata_rsp(struct sk_buff *skb)
f->tag = FREETAG;
aoecmd_work(d);
-
sl = d->sendq_hd;
d->sendq_hd = d->sendq_tl = NULL;
spin_unlock_irqrestore(&d->lock, flags);
-
aoenet_xmit(sl);
}
void
aoecmd_cfg(ushort aoemajor, unsigned char aoeminor)
{
- struct aoe_hdr *h;
- struct aoe_cfghdr *ch;
- struct sk_buff *skb, *sl;
- struct net_device *ifp;
-
- sl = NULL;
-
- read_lock(&dev_base_lock);
- for (ifp = dev_base; ifp; dev_put(ifp), ifp = ifp->next) {
- dev_hold(ifp);
- if (!is_aoe_netif(ifp))
- continue;
-
- skb = new_skb(ifp, sizeof *h + sizeof *ch);
- if (skb == NULL) {
- printk(KERN_INFO "aoe: aoecmd_cfg: skb alloc failure\n");
- continue;
- }
- h = (struct aoe_hdr *) skb->mac.raw;
- memset(h, 0, sizeof *h + sizeof *ch);
-
- memset(h->dst, 0xff, sizeof h->dst);
- memcpy(h->src, ifp->dev_addr, sizeof h->src);
- h->type = __constant_cpu_to_be16(ETH_P_AOE);
- h->verfl = AOE_HVER;
- h->major = cpu_to_be16(aoemajor);
- h->minor = aoeminor;
- h->cmd = AOECMD_CFG;
+ struct sk_buff *sl;
- skb->next = sl;
- sl = skb;
- }
- read_unlock(&dev_base_lock);
+ sl = aoecmd_cfg_pkts(aoemajor, aoeminor, NULL);
aoenet_xmit(sl);
}
@@ -562,9 +625,6 @@ aoecmd_ata_id(struct aoedev *d)
f->waited = 0;
f->writedatalen = 0;
- /* this message initializes the device, so we reset the rttavg */
- d->rttavg = MAXTIMER;
-
/* set up ata header */
ah->scnt = 1;
ah->cmdstat = WIN_IDENTIFY;
@@ -572,12 +632,8 @@ aoecmd_ata_id(struct aoedev *d)
skb = skb_prepare(d, f);
- /* we now want to start the rexmit tracking */
- d->flags &= ~DEVFL_TKILL;
- d->timer.data = (ulong) d;
+ d->rttavg = MAXTIMER;
d->timer.function = rexmit_timer;
- d->timer.expires = jiffies + TIMERTICK;
- add_timer(&d->timer);
return skb;
}
@@ -619,23 +675,28 @@ aoecmd_cfg_rsp(struct sk_buff *skb)
if (bufcnt > MAXFRAMES) /* keep it reasonable */
bufcnt = MAXFRAMES;
- d = aoedev_set(sysminor, h->src, skb->dev, bufcnt);
+ d = aoedev_by_sysminor_m(sysminor, bufcnt);
if (d == NULL) {
- printk(KERN_INFO "aoe: aoecmd_cfg_rsp: device set failure\n");
+ printk(KERN_INFO "aoe: aoecmd_cfg_rsp: device sysminor_m failure\n");
return;
}
spin_lock_irqsave(&d->lock, flags);
- if (d->flags & (DEVFL_UP | DEVFL_CLOSEWAIT)) {
+ /* permit device to migrate mac and network interface */
+ d->ifp = skb->dev;
+ memcpy(d->addr, h->src, sizeof d->addr);
+
+ /* don't change users' perspective */
+ if (d->nopen && !(d->flags & DEVFL_PAUSE)) {
spin_unlock_irqrestore(&d->lock, flags);
return;
}
-
+ d->flags |= DEVFL_PAUSE; /* force pause */
d->fw_ver = be16_to_cpu(ch->fwver);
- /* we get here only if the device is new */
- sl = aoecmd_ata_id(d);
+ /* check for already outstanding ataid */
+ sl = aoedev_isbusy(d) == 0 ? aoecmd_ata_id(d) : NULL;
spin_unlock_irqrestore(&d->lock, flags);
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-10 19:02:00 +0000