-/* Copyright (c) 2004 Coraid, Inc. See COPYING for GPL terms. */
+/* Copyright (c) 2007 Coraid, Inc. See COPYING for GPL terms. */
/*
* aoecmd.c
* Filesystem request handling methods
#include <linux/blkdev.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
+#include <linux/genhd.h>
+#include <linux/moduleparam.h>
+#include <net/net_namespace.h>
#include <asm/unaligned.h>
#include "aoe.h"
-#define TIMERTICK (HZ / 10)
-#define MINTIMER (2 * TIMERTICK)
-#define MAXTIMER (HZ << 1)
-#define MAXWAIT (60 * 3) /* After MAXWAIT seconds, give up and fail dev */
+static int aoe_deadsecs = 60 * 3;
+module_param(aoe_deadsecs, int, 0644);
+MODULE_PARM_DESC(aoe_deadsecs, "After aoe_deadsecs seconds, give up and fail dev.");
+
+static int aoe_maxout = 16;
+module_param(aoe_maxout, int, 0644);
+MODULE_PARM_DESC(aoe_maxout,
+ "Only aoe_maxout outstanding packets for every MAC on eX.Y.");
static struct sk_buff *
-new_skb(struct net_device *if_dev, ulong len)
+new_skb(ulong len)
{
struct sk_buff *skb;
skb = alloc_skb(len, GFP_ATOMIC);
if (skb) {
- skb->nh.raw = skb->mac.raw = skb->data;
- skb->dev = if_dev;
+ skb_reset_mac_header(skb);
+ skb_reset_network_header(skb);
skb->protocol = __constant_htons(ETH_P_AOE);
skb->priority = 0;
- skb_put(skb, len);
skb->next = skb->prev = NULL;
/* tell the network layer not to perform IP checksums
return skb;
}
-static struct sk_buff *
-skb_prepare(struct aoedev *d, struct frame *f)
-{
- struct sk_buff *skb;
- char *p;
-
- skb = new_skb(d->ifp, f->ndata + f->writedatalen);
- if (!skb) {
- printk(KERN_INFO "aoe: skb_prepare: failure to allocate skb\n");
- return NULL;
- }
-
- p = skb->mac.raw;
- memcpy(p, f->data, f->ndata);
-
- if (f->writedatalen) {
- p += sizeof(struct aoe_hdr) + sizeof(struct aoe_atahdr);
- memcpy(p, f->bufaddr, f->writedatalen);
- }
-
- return skb;
-}
-
static struct frame *
-getframe(struct aoedev *d, int tag)
+getframe(struct aoetgt *t, int tag)
{
struct frame *f, *e;
- f = d->frames;
- e = f + d->nframes;
+ f = t->frames;
+ e = f + t->nframes;
for (; f<e; f++)
if (f->tag == tag)
return f;
* This driver reserves tag -1 to mean "unused frame."
*/
static int
-newtag(struct aoedev *d)
+newtag(struct aoetgt *t)
{
register ulong n;
n = jiffies & 0xffff;
- return n |= (++d->lasttag & 0x7fff) << 16;
+ return n |= (++t->lasttag & 0x7fff) << 16;
}
static int
-aoehdr_atainit(struct aoedev *d, struct aoe_hdr *h)
+aoehdr_atainit(struct aoedev *d, struct aoetgt *t, struct aoe_hdr *h)
{
- u32 host_tag = newtag(d);
+ u32 host_tag = newtag(t);
- memcpy(h->src, d->ifp->dev_addr, sizeof h->src);
- memcpy(h->dst, d->addr, sizeof h->dst);
+ memcpy(h->src, t->ifp->nd->dev_addr, sizeof h->src);
+ memcpy(h->dst, t->addr, sizeof h->dst);
h->type = __constant_cpu_to_be16(ETH_P_AOE);
h->verfl = AOE_HVER;
h->major = cpu_to_be16(d->aoemajor);
return host_tag;
}
+static inline void
+put_lba(struct aoe_atahdr *ah, sector_t lba)
+{
+ ah->lba0 = lba;
+ ah->lba1 = lba >>= 8;
+ ah->lba2 = lba >>= 8;
+ ah->lba3 = lba >>= 8;
+ ah->lba4 = lba >>= 8;
+ ah->lba5 = lba >>= 8;
+}
+
+static void
+ifrotate(struct aoetgt *t)
+{
+ t->ifp++;
+ if (t->ifp >= &t->ifs[NAOEIFS] || t->ifp->nd == NULL)
+ t->ifp = t->ifs;
+ if (t->ifp->nd == NULL) {
+ printk(KERN_INFO "aoe: no interface to rotate to\n");
+ BUG();
+ }
+}
+
static void
-aoecmd_ata_rw(struct aoedev *d, struct frame *f)
+skb_pool_put(struct aoedev *d, struct sk_buff *skb)
+{
+ if (!d->skbpool_hd)
+ d->skbpool_hd = skb;
+ else
+ d->skbpool_tl->next = skb;
+ d->skbpool_tl = skb;
+}
+
+static struct sk_buff *
+skb_pool_get(struct aoedev *d)
+{
+ struct sk_buff *skb;
+
+ skb = d->skbpool_hd;
+ if (skb && atomic_read(&skb_shinfo(skb)->dataref) == 1) {
+ d->skbpool_hd = skb->next;
+ skb->next = NULL;
+ return skb;
+ }
+ if (d->nskbpool < NSKBPOOLMAX
+ && (skb = new_skb(ETH_ZLEN))) {
+ d->nskbpool++;
+ return skb;
+ }
+ return NULL;
+}
+
+/* freeframe is where we do our load balancing so it's a little hairy. */
+static struct frame *
+freeframe(struct aoedev *d)
{
+ struct frame *f, *e, *rf;
+ struct aoetgt **t;
+ struct sk_buff *skb;
+
+ if (d->targets[0] == NULL) { /* shouldn't happen, but I'm paranoid */
+ printk(KERN_ERR "aoe: NULL TARGETS!\n");
+ return NULL;
+ }
+ t = d->tgt;
+ t++;
+ if (t >= &d->targets[NTARGETS] || !*t)
+ t = d->targets;
+ for (;;) {
+ if ((*t)->nout < (*t)->maxout
+ && t != d->htgt
+ && (*t)->ifp->nd) {
+ rf = NULL;
+ f = (*t)->frames;
+ e = f + (*t)->nframes;
+ for (; f < e; f++) {
+ if (f->tag != FREETAG)
+ continue;
+ skb = f->skb;
+ if (!skb
+ && !(f->skb = skb = new_skb(ETH_ZLEN)))
+ continue;
+ if (atomic_read(&skb_shinfo(skb)->dataref)
+ != 1) {
+ if (!rf)
+ rf = f;
+ continue;
+ }
+gotone: skb_shinfo(skb)->nr_frags = skb->data_len = 0;
+ skb_trim(skb, 0);
+ d->tgt = t;
+ ifrotate(*t);
+ return f;
+ }
+ /* Work can be done, but the network layer is
+ holding our precious packets. Try to grab
+ one from the pool. */
+ f = rf;
+ if (f == NULL) { /* more paranoia */
+ printk(KERN_ERR
+ "aoe: freeframe: %s.\n",
+ "unexpected null rf");
+ d->flags |= DEVFL_KICKME;
+ return NULL;
+ }
+ skb = skb_pool_get(d);
+ if (skb) {
+ skb_pool_put(d, f->skb);
+ f->skb = skb;
+ goto gotone;
+ }
+ (*t)->dataref++;
+ if ((*t)->nout == 0)
+ d->flags |= DEVFL_KICKME;
+ }
+ if (t == d->tgt) /* we've looped and found nada */
+ break;
+ t++;
+ if (t >= &d->targets[NTARGETS] || !*t)
+ t = d->targets;
+ }
+ return NULL;
+}
+
+static int
+aoecmd_ata_rw(struct aoedev *d)
+{
+ struct frame *f;
struct aoe_hdr *h;
struct aoe_atahdr *ah;
struct buf *buf;
+ struct bio_vec *bv;
+ struct aoetgt *t;
struct sk_buff *skb;
ulong bcnt;
- register sector_t sector;
char writebit, extbit;
writebit = 0x10;
extbit = 0x4;
+ f = freeframe(d);
+ if (f == NULL)
+ return 0;
+ t = *d->tgt;
buf = d->inprocess;
-
- sector = buf->sector;
- bcnt = buf->bv_resid;
- if (bcnt > MAXATADATA)
- bcnt = MAXATADATA;
-
+ bv = buf->bv;
+ bcnt = t->ifp->maxbcnt;
+ if (bcnt == 0)
+ bcnt = DEFAULTBCNT;
+ if (bcnt > buf->bv_resid)
+ bcnt = buf->bv_resid;
/* initialize the headers & frame */
- h = (struct aoe_hdr *) f->data;
+ skb = f->skb;
+ h = (struct aoe_hdr *) skb_mac_header(skb);
ah = (struct aoe_atahdr *) (h+1);
- f->ndata = sizeof *h + sizeof *ah;
- memset(h, 0, f->ndata);
- f->tag = aoehdr_atainit(d, h);
+ skb_put(skb, sizeof *h + sizeof *ah);
+ memset(h, 0, skb->len);
+ f->tag = aoehdr_atainit(d, t, h);
+ t->nout++;
f->waited = 0;
f->buf = buf;
- f->bufaddr = buf->bufaddr;
+ f->bufaddr = page_address(bv->bv_page) + buf->bv_off;
+ f->bcnt = bcnt;
+ f->lba = buf->sector;
/* set up ata header */
ah->scnt = bcnt >> 9;
- ah->lba0 = sector;
- ah->lba1 = sector >>= 8;
- ah->lba2 = sector >>= 8;
- ah->lba3 = sector >>= 8;
+ put_lba(ah, buf->sector);
if (d->flags & DEVFL_EXT) {
ah->aflags |= AOEAFL_EXT;
- ah->lba4 = sector >>= 8;
- ah->lba5 = sector >>= 8;
} else {
extbit = 0;
ah->lba3 &= 0x0f;
ah->lba3 |= 0xe0; /* LBA bit + obsolete 0xa0 */
}
-
if (bio_data_dir(buf->bio) == WRITE) {
+ skb_fill_page_desc(skb, 0, bv->bv_page, buf->bv_off, bcnt);
ah->aflags |= AOEAFL_WRITE;
- f->writedatalen = bcnt;
+ skb->len += bcnt;
+ skb->data_len = bcnt;
+ t->wpkts++;
} else {
+ t->rpkts++;
writebit = 0;
- f->writedatalen = 0;
}
ah->cmdstat = WIN_READ | writebit | extbit;
/* mark all tracking fields and load out */
buf->nframesout += 1;
- buf->bufaddr += bcnt;
+ buf->bv_off += bcnt;
buf->bv_resid -= bcnt;
-/* printk(KERN_INFO "aoe: bv_resid=%ld\n", buf->bv_resid); */
buf->resid -= bcnt;
buf->sector += bcnt >> 9;
if (buf->resid == 0) {
d->inprocess = NULL;
} else if (buf->bv_resid == 0) {
- buf->bv++;
- buf->bv_resid = buf->bv->bv_len;
- buf->bufaddr = page_address(buf->bv->bv_page) + buf->bv->bv_offset;
+ buf->bv = ++bv;
+ buf->bv_resid = bv->bv_len;
+ WARN_ON(buf->bv_resid == 0);
+ buf->bv_off = bv->bv_offset;
}
- skb = skb_prepare(d, f);
+ skb->dev = t->ifp->nd;
+ skb = skb_clone(skb, GFP_ATOMIC);
if (skb) {
- skb->next = NULL;
if (d->sendq_hd)
d->sendq_tl->next = skb;
else
d->sendq_hd = skb;
d->sendq_tl = skb;
}
+ return 1;
}
-/* enters with d->lock held */
-void
-aoecmd_work(struct aoedev *d)
+/* 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 frame *f;
- struct buf *buf;
-loop:
- f = getframe(d, FREETAG);
- if (f == NULL)
- return;
- if (d->inprocess == NULL) {
- if (list_empty(&d->bufq))
- return;
- buf = container_of(d->bufq.next, struct buf, bufs);
- list_del(d->bufq.next);
-/*printk(KERN_INFO "aoecmd_work: bi_size=%ld\n", buf->bio->bi_size); */
- d->inprocess = buf;
+ 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_each_netdev(&init_net, ifp) {
+ dev_hold(ifp);
+ if (!is_aoe_netif(ifp))
+ goto cont;
+
+ skb = new_skb(sizeof *h + sizeof *ch);
+ if (skb == NULL) {
+ printk(KERN_INFO "aoe: skb alloc failure\n");
+ goto cont;
+ }
+ skb_put(skb, sizeof *h + sizeof *ch);
+ skb->dev = ifp;
+ if (sl_tail == NULL)
+ sl_tail = skb;
+ h = (struct aoe_hdr *) skb_mac_header(skb);
+ 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;
+cont:
+ dev_put(ifp);
}
- aoecmd_ata_rw(d, f);
- goto loop;
+ read_unlock(&dev_base_lock);
+
+ if (tail != NULL)
+ *tail = sl_tail;
+ return sl;
}
static void
-rexmit(struct aoedev *d, struct frame *f)
+resend(struct aoedev *d, struct aoetgt *t, struct frame *f)
{
struct sk_buff *skb;
struct aoe_hdr *h;
+ struct aoe_atahdr *ah;
char buf[128];
u32 n;
- n = newtag(d);
+ ifrotate(t);
+ n = newtag(t);
+ skb = f->skb;
+ h = (struct aoe_hdr *) skb_mac_header(skb);
+ ah = (struct aoe_atahdr *) (h+1);
snprintf(buf, sizeof buf,
- "%15s e%ld.%ld oldtag=%08x@%08lx newtag=%08x\n",
- "retransmit",
- d->aoemajor, d->aoeminor, f->tag, jiffies, n);
+ "%15s e%ld.%d oldtag=%08x@%08lx newtag=%08x "
+ "s=%012llx d=%012llx nout=%d\n",
+ "retransmit", d->aoemajor, d->aoeminor, f->tag, jiffies, n,
+ mac_addr(h->src),
+ mac_addr(h->dst), t->nout);
aoechr_error(buf);
- h = (struct aoe_hdr *) f->data;
f->tag = n;
h->tag = cpu_to_be32(n);
-
- skb = skb_prepare(d, f);
- if (skb) {
- skb->next = NULL;
- if (d->sendq_hd)
- d->sendq_tl->next = skb;
- else
- d->sendq_hd = skb;
- d->sendq_tl = skb;
+ memcpy(h->dst, t->addr, sizeof h->dst);
+ memcpy(h->src, t->ifp->nd->dev_addr, sizeof h->src);
+
+ switch (ah->cmdstat) {
+ default:
+ break;
+ case WIN_READ:
+ case WIN_READ_EXT:
+ case WIN_WRITE:
+ case WIN_WRITE_EXT:
+ put_lba(ah, f->lba);
+
+ n = f->bcnt;
+ if (n > DEFAULTBCNT)
+ n = DEFAULTBCNT;
+ ah->scnt = n >> 9;
+ if (ah->aflags & AOEAFL_WRITE) {
+ skb_fill_page_desc(skb, 0, virt_to_page(f->bufaddr),
+ offset_in_page(f->bufaddr), n);
+ skb->len = sizeof *h + sizeof *ah + n;
+ skb->data_len = n;
+ }
}
+ skb->dev = t->ifp->nd;
+ skb = skb_clone(skb, GFP_ATOMIC);
+ if (skb == NULL)
+ return;
+ if (d->sendq_hd)
+ d->sendq_tl->next = skb;
+ else
+ d->sendq_hd = skb;
+ d->sendq_tl = skb;
}
static int
return n;
}
+static struct aoeif *
+getif(struct aoetgt *t, struct net_device *nd)
+{
+ struct aoeif *p, *e;
+
+ p = t->ifs;
+ e = p + NAOEIFS;
+ for (; p < e; p++)
+ if (p->nd == nd)
+ return p;
+ return NULL;
+}
+
+static struct aoeif *
+addif(struct aoetgt *t, struct net_device *nd)
+{
+ struct aoeif *p;
+
+ p = getif(t, NULL);
+ if (!p)
+ return NULL;
+ p->nd = nd;
+ p->maxbcnt = DEFAULTBCNT;
+ p->lost = 0;
+ p->lostjumbo = 0;
+ return p;
+}
+
+static void
+ejectif(struct aoetgt *t, struct aoeif *ifp)
+{
+ struct aoeif *e;
+ ulong n;
+
+ e = t->ifs + NAOEIFS - 1;
+ n = (e - ifp) * sizeof *ifp;
+ memmove(ifp, ifp+1, n);
+ e->nd = NULL;
+}
+
+static int
+sthtith(struct aoedev *d)
+{
+ struct frame *f, *e, *nf;
+ struct sk_buff *skb;
+ struct aoetgt *ht = *d->htgt;
+
+ f = ht->frames;
+ e = f + ht->nframes;
+ for (; f < e; f++) {
+ if (f->tag == FREETAG)
+ continue;
+ nf = freeframe(d);
+ if (!nf)
+ return 0;
+ skb = nf->skb;
+ *nf = *f;
+ f->skb = skb;
+ f->tag = FREETAG;
+ nf->waited = 0;
+ ht->nout--;
+ (*d->tgt)->nout++;
+ resend(d, *d->tgt, nf);
+ }
+ /* he's clean, he's useless. take away his interfaces */
+ memset(ht->ifs, 0, sizeof ht->ifs);
+ d->htgt = NULL;
+ return 1;
+}
+
+static inline unsigned char
+ata_scnt(unsigned char *packet) {
+ struct aoe_hdr *h;
+ struct aoe_atahdr *ah;
+
+ h = (struct aoe_hdr *) packet;
+ ah = (struct aoe_atahdr *) (h+1);
+ return ah->scnt;
+}
+
static void
rexmit_timer(ulong vp)
{
struct aoedev *d;
+ struct aoetgt *t, **tt, **te;
+ struct aoeif *ifp;
struct frame *f, *e;
struct sk_buff *sl;
register long timeout;
spin_lock_irqsave(&d->lock, flags);
if (d->flags & DEVFL_TKILL) {
-tdie: spin_unlock_irqrestore(&d->lock, flags);
+ spin_unlock_irqrestore(&d->lock, flags);
return;
}
- f = d->frames;
- e = f + d->nframes;
- for (; f<e; f++) {
- if (f->tag != FREETAG && tsince(f->tag) >= timeout) {
+ tt = d->targets;
+ te = tt + NTARGETS;
+ for (; tt < te && *tt; tt++) {
+ t = *tt;
+ f = t->frames;
+ e = f + t->nframes;
+ for (; f < e; f++) {
+ if (f->tag == FREETAG
+ || tsince(f->tag) < timeout)
+ continue;
n = f->waited += timeout;
n /= HZ;
- if (n > MAXWAIT) { /* waited too long. device failure. */
+ if (n > aoe_deadsecs) {
+ /* waited too long. device failure. */
aoedev_downdev(d);
- goto tdie;
+ break;
}
- rexmit(d, f);
+
+ if (n > HELPWAIT /* see if another target can help */
+ && (tt != d->targets || d->targets[1]))
+ d->htgt = tt;
+
+ if (t->nout == t->maxout) {
+ if (t->maxout > 1)
+ t->maxout--;
+ t->lastwadj = jiffies;
+ }
+
+ ifp = getif(t, f->skb->dev);
+ if (ifp && ++ifp->lost > (t->nframes << 1)
+ && (ifp != t->ifs || t->ifs[1].nd)) {
+ ejectif(t, ifp);
+ ifp = NULL;
+ }
+
+ if (ata_scnt(skb_mac_header(f->skb)) > DEFAULTBCNT / 512
+ && ifp && ++ifp->lostjumbo > (t->nframes << 1)
+ && ifp->maxbcnt != DEFAULTBCNT) {
+ printk(KERN_INFO
+ "aoe: e%ld.%d: "
+ "too many lost jumbo on "
+ "%s:%012llx - "
+ "falling back to %d frames.\n",
+ d->aoemajor, d->aoeminor,
+ ifp->nd->name, mac_addr(t->addr),
+ DEFAULTBCNT);
+ ifp->maxbcnt = 0;
+ }
+ resend(d, t, f);
+ }
+
+ /* window check */
+ if (t->nout == t->maxout
+ && t->maxout < t->nframes
+ && (jiffies - t->lastwadj)/HZ > 10) {
+ t->maxout++;
+ t->lastwadj = jiffies;
}
}
- sl = d->sendq_hd;
- d->sendq_hd = d->sendq_tl = NULL;
- if (sl) {
+ if (d->sendq_hd) {
n = d->rttavg <<= 1;
if (n > MAXTIMER)
d->rttavg = MAXTIMER;
}
+ if (d->flags & DEVFL_KICKME || d->htgt) {
+ d->flags &= ~DEVFL_KICKME;
+ aoecmd_work(d);
+ }
+
+ sl = d->sendq_hd;
+ d->sendq_hd = d->sendq_tl = NULL;
+
d->timer.expires = jiffies + TIMERTICK;
add_timer(&d->timer);
aoenet_xmit(sl);
}
+/* enters with d->lock held */
+void
+aoecmd_work(struct aoedev *d)
+{
+ struct buf *buf;
+loop:
+ if (d->htgt && !sthtith(d))
+ return;
+ if (d->inprocess == NULL) {
+ if (list_empty(&d->bufq))
+ return;
+ buf = container_of(d->bufq.next, struct buf, bufs);
+ list_del(d->bufq.next);
+ d->inprocess = buf;
+ }
+ if (aoecmd_ata_rw(d))
+ goto loop;
+}
+
+/* this function performs work that has been deferred until sleeping is OK
+ */
+void
+aoecmd_sleepwork(struct work_struct *work)
+{
+ struct aoedev *d = container_of(work, struct aoedev, work);
+
+ 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)
+ataid_complete(struct aoedev *d, struct aoetgt *t, unsigned char *id)
{
u64 ssize;
u16 n;
/* word 83: command set supported */
- n = le16_to_cpu(get_unaligned((__le16 *) &id[83<<1]));
+ n = get_unaligned_le16(&id[83 << 1]);
/* word 86: command set/feature enabled */
- n |= le16_to_cpu(get_unaligned((__le16 *) &id[86<<1]));
+ n |= get_unaligned_le16(&id[86 << 1]);
if (n & (1<<10)) { /* bit 10: LBA 48 */
d->flags |= DEVFL_EXT;
/* word 100: number lba48 sectors */
- ssize = le64_to_cpu(get_unaligned((__le64 *) &id[100<<1]));
+ ssize = get_unaligned_le64(&id[100 << 1]);
/* set as in ide-disk.c:init_idedisk_capacity */
d->geo.cylinders = ssize;
d->flags &= ~DEVFL_EXT;
/* number lba28 sectors */
- ssize = le32_to_cpu(get_unaligned((__le32 *) &id[60<<1]));
+ ssize = get_unaligned_le32(&id[60 << 1]);
/* NOTE: obsolete in ATA 6 */
- d->geo.cylinders = le16_to_cpu(get_unaligned((__le16 *) &id[54<<1]));
- d->geo.heads = le16_to_cpu(get_unaligned((__le16 *) &id[55<<1]));
- d->geo.sectors = le16_to_cpu(get_unaligned((__le16 *) &id[56<<1]));
+ d->geo.cylinders = get_unaligned_le16(&id[54 << 1]);
+ d->geo.heads = get_unaligned_le16(&id[55 << 1]);
+ d->geo.sectors = get_unaligned_le16(&id[56 << 1]);
}
+
+ if (d->ssize != ssize)
+ printk(KERN_INFO
+ "aoe: %012llx e%ld.%d v%04x has %llu sectors\n",
+ mac_addr(t->addr),
+ d->aoemajor, d->aoeminor,
+ d->fw_ver, (long long)ssize);
d->ssize = ssize;
d->geo.start = 0;
+ if (d->flags & (DEVFL_GDALLOC|DEVFL_NEWSIZE))
+ return;
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;
- }
- INIT_WORK(&d->work, aoeblk_gdalloc, d);
+ d->flags |= DEVFL_NEWSIZE;
+ } else
+ d->flags |= DEVFL_GDALLOC;
schedule_work(&d->work);
- d->flags |= DEVFL_WORKON;
}
static void
register long n;
n = rtt;
- if (n < MINTIMER)
- n = MINTIMER;
+ if (n < 0) {
+ n = -rtt;
+ if (n < MINTIMER)
+ n = MINTIMER;
+ else if (n > MAXTIMER)
+ n = MAXTIMER;
+ d->mintimer += (n - d->mintimer) >> 1;
+ } else if (n < d->mintimer)
+ n = d->mintimer;
else if (n > MAXTIMER)
n = MAXTIMER;
d->rttavg += n >> 2;
}
+static struct aoetgt *
+gettgt(struct aoedev *d, char *addr)
+{
+ struct aoetgt **t, **e;
+
+ t = d->targets;
+ e = t + NTARGETS;
+ for (; t < e && *t; t++)
+ if (memcmp((*t)->addr, addr, sizeof((*t)->addr)) == 0)
+ return *t;
+ return NULL;
+}
+
+static inline void
+diskstats(struct gendisk *disk, struct bio *bio, ulong duration, sector_t sector)
+{
+ unsigned long n_sect = bio->bi_size >> 9;
+ const int rw = bio_data_dir(bio);
+ struct hd_struct *part;
+
+ part = disk_map_sector(disk, sector);
+ all_stat_inc(disk, part, ios[rw], sector);
+ all_stat_add(disk, part, ticks[rw], duration, sector);
+ all_stat_add(disk, part, sectors[rw], n_sect, sector);
+ all_stat_add(disk, part, io_ticks, duration, sector);
+}
+
void
aoecmd_ata_rsp(struct sk_buff *skb)
{
struct aoedev *d;
- struct aoe_hdr *hin;
+ struct aoe_hdr *hin, *hout;
struct aoe_atahdr *ahin, *ahout;
struct frame *f;
struct buf *buf;
struct sk_buff *sl;
+ struct aoetgt *t;
+ struct aoeif *ifp;
register long n;
ulong flags;
char ebuf[128];
u16 aoemajor;
- hin = (struct aoe_hdr *) skb->mac.raw;
- aoemajor = be16_to_cpu(hin->major);
+ hin = (struct aoe_hdr *) skb_mac_header(skb);
+ aoemajor = get_unaligned_be16(&hin->major);
d = aoedev_by_aoeaddr(aoemajor, hin->minor);
if (d == NULL) {
snprintf(ebuf, sizeof ebuf, "aoecmd_ata_rsp: ata response "
spin_lock_irqsave(&d->lock, flags);
- f = getframe(d, be32_to_cpu(hin->tag));
+ n = get_unaligned_be32(&hin->tag);
+ t = gettgt(d, hin->src);
+ if (t == NULL) {
+ printk(KERN_INFO "aoe: can't find target e%ld.%d:%012llx\n",
+ d->aoemajor, d->aoeminor, mac_addr(hin->src));
+ spin_unlock_irqrestore(&d->lock, flags);
+ return;
+ }
+ f = getframe(t, n);
if (f == NULL) {
+ calc_rttavg(d, -tsince(n));
spin_unlock_irqrestore(&d->lock, flags);
snprintf(ebuf, sizeof ebuf,
"%15s e%d.%d tag=%08x@%08lx\n",
"unexpected rsp",
- be16_to_cpu(hin->major),
+ get_unaligned_be16(&hin->major),
hin->minor,
- be32_to_cpu(hin->tag),
+ get_unaligned_be32(&hin->tag),
jiffies);
aoechr_error(ebuf);
return;
calc_rttavg(d, tsince(f->tag));
ahin = (struct aoe_atahdr *) (hin+1);
- ahout = (struct aoe_atahdr *) (f->data + sizeof(struct aoe_hdr));
+ hout = (struct aoe_hdr *) skb_mac_header(f->skb);
+ ahout = (struct aoe_atahdr *) (hout+1);
buf = f->buf;
if (ahin->cmdstat & 0xa9) { /* these bits cleared on success */
- printk(KERN_CRIT "aoe: aoecmd_ata_rsp: ata error cmd=%2.2Xh "
- "stat=%2.2Xh from e%ld.%ld\n",
+ printk(KERN_ERR
+ "aoe: ata error cmd=%2.2Xh stat=%2.2Xh from e%ld.%d\n",
ahout->cmdstat, ahin->cmdstat,
d->aoemajor, d->aoeminor);
if (buf)
buf->flags |= BUFFL_FAIL;
} else {
+ if (d->htgt && t == *d->htgt) /* I'll help myself, thank you. */
+ d->htgt = NULL;
+ n = ahout->scnt << 9;
switch (ahout->cmdstat) {
case WIN_READ:
case WIN_READ_EXT:
- n = ahout->scnt << 9;
if (skb->len - sizeof *hin - sizeof *ahin < n) {
- printk(KERN_CRIT "aoe: aoecmd_ata_rsp: runt "
- "ata data size in read. skb->len=%d\n",
- skb->len);
+ printk(KERN_ERR
+ "aoe: %s. skb->len=%d need=%ld\n",
+ "runt data size in read", skb->len, n);
/* fail frame f? just returning will rexmit. */
spin_unlock_irqrestore(&d->lock, flags);
return;
memcpy(f->bufaddr, ahin+1, n);
case WIN_WRITE:
case WIN_WRITE_EXT:
+ ifp = getif(t, skb->dev);
+ if (ifp) {
+ ifp->lost = 0;
+ if (n > DEFAULTBCNT)
+ ifp->lostjumbo = 0;
+ }
+ if (f->bcnt -= n) {
+ f->lba += n >> 9;
+ f->bufaddr += n;
+ resend(d, t, f);
+ goto xmit;
+ }
break;
case WIN_IDENTIFY:
if (skb->len - sizeof *hin - sizeof *ahin < 512) {
- printk(KERN_INFO "aoe: aoecmd_ata_rsp: runt data size "
- "in ataid. skb->len=%d\n", skb->len);
+ printk(KERN_INFO
+ "aoe: runt data size in ataid. skb->len=%d\n",
+ skb->len);
spin_unlock_irqrestore(&d->lock, flags);
return;
}
- ataid_complete(d, (char *) (ahin+1));
- /* d->flags |= DEVFL_WC_UPDATE; */
+ ataid_complete(d, t, (char *) (ahin+1));
break;
default:
- printk(KERN_INFO "aoe: aoecmd_ata_rsp: unrecognized "
- "outbound ata command %2.2Xh for %d.%d\n",
- ahout->cmdstat,
- be16_to_cpu(hin->major),
- hin->minor);
+ printk(KERN_INFO
+ "aoe: unrecognized ata command %2.2Xh for %d.%d\n",
+ ahout->cmdstat,
+ get_unaligned_be16(&hin->major),
+ hin->minor);
}
}
- if (buf) {
- buf->nframesout -= 1;
- if (buf->nframesout == 0 && buf->resid == 0) {
- unsigned long duration = jiffies - buf->start_time;
- unsigned long n_sect = buf->bio->bi_size >> 9;
- struct gendisk *disk = d->gd;
- const int rw = bio_data_dir(buf->bio);
-
- disk_stat_inc(disk, ios[rw]);
- disk_stat_add(disk, ticks[rw], duration);
- disk_stat_add(disk, sectors[rw], n_sect);
- disk_stat_add(disk, io_ticks, duration);
- n = (buf->flags & BUFFL_FAIL) ? -EIO : 0;
- bio_endio(buf->bio, buf->bio->bi_size, n);
- mempool_free(buf, d->bufpool);
- }
+ if (buf && --buf->nframesout == 0 && buf->resid == 0) {
+ diskstats(d->gd, buf->bio, jiffies - buf->stime, buf->sector);
+ n = (buf->flags & BUFFL_FAIL) ? -EIO : 0;
+ bio_endio(buf->bio, n);
+ mempool_free(buf, d->bufpool);
}
f->buf = NULL;
f->tag = FREETAG;
+ t->nout--;
aoecmd_work(d);
-
+xmit:
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);
}
-/*
- * Since we only call this in one place (and it only prepares one frame)
- * we just return the skb. Usually we'd chain it up to the aoedev sendq.
- */
-static struct sk_buff *
+struct sk_buff *
aoecmd_ata_id(struct aoedev *d)
{
struct aoe_hdr *h;
struct aoe_atahdr *ah;
struct frame *f;
struct sk_buff *skb;
+ struct aoetgt *t;
- f = getframe(d, FREETAG);
- if (f == NULL) {
- printk(KERN_CRIT "aoe: aoecmd_ata_id: can't get a frame. "
- "This shouldn't happen.\n");
+ f = freeframe(d);
+ if (f == NULL)
return NULL;
- }
+
+ t = *d->tgt;
/* initialize the headers & frame */
- h = (struct aoe_hdr *) f->data;
+ skb = f->skb;
+ h = (struct aoe_hdr *) skb_mac_header(skb);
ah = (struct aoe_atahdr *) (h+1);
- f->ndata = sizeof *h + sizeof *ah;
- memset(h, 0, f->ndata);
- f->tag = aoehdr_atainit(d, h);
+ skb_put(skb, sizeof *h + sizeof *ah);
+ memset(h, 0, skb->len);
+ f->tag = aoehdr_atainit(d, t, h);
+ t->nout++;
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;
ah->lba3 = 0xa0;
- skb = skb_prepare(d, f);
+ skb->dev = t->ifp->nd;
- /* 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;
+ return skb_clone(skb, GFP_ATOMIC);
}
+static struct aoetgt *
+addtgt(struct aoedev *d, char *addr, ulong nframes)
+{
+ struct aoetgt *t, **tt, **te;
+ struct frame *f, *e;
+
+ tt = d->targets;
+ te = tt + NTARGETS;
+ for (; tt < te && *tt; tt++)
+ ;
+
+ if (tt == te) {
+ printk(KERN_INFO
+ "aoe: device addtgt failure; too many targets\n");
+ return NULL;
+ }
+ t = kcalloc(1, sizeof *t, GFP_ATOMIC);
+ f = kcalloc(nframes, sizeof *f, GFP_ATOMIC);
+ if (!t || !f) {
+ kfree(f);
+ kfree(t);
+ printk(KERN_INFO "aoe: cannot allocate memory to add target\n");
+ return NULL;
+ }
+
+ t->nframes = nframes;
+ t->frames = f;
+ e = f + nframes;
+ for (; f < e; f++)
+ f->tag = FREETAG;
+ memcpy(t->addr, addr, sizeof t->addr);
+ t->ifp = t->ifs;
+ t->maxout = t->nframes;
+ return *tt = t;
+}
+
void
aoecmd_cfg_rsp(struct sk_buff *skb)
{
struct aoedev *d;
struct aoe_hdr *h;
struct aoe_cfghdr *ch;
+ struct aoetgt *t;
+ struct aoeif *ifp;
ulong flags, sysminor, aoemajor;
- u16 bufcnt;
struct sk_buff *sl;
- enum { MAXFRAMES = 8 };
+ u16 n;
- h = (struct aoe_hdr *) skb->mac.raw;
+ h = (struct aoe_hdr *) skb_mac_header(skb);
ch = (struct aoe_cfghdr *) (h+1);
/*
* Enough people have their dip switches set backwards to
* warrant a loud message for this special case.
*/
- aoemajor = be16_to_cpu(h->major);
+ aoemajor = get_unaligned_be16(&h->major);
if (aoemajor == 0xfff) {
- printk(KERN_CRIT "aoe: aoecmd_cfg_rsp: Warning: shelf "
- "address is all ones. Check shelf dip switches\n");
+ printk(KERN_ERR "aoe: Warning: shelf address is all ones. "
+ "Check shelf dip switches.\n");
return;
}
sysminor = SYSMINOR(aoemajor, h->minor);
if (sysminor * AOE_PARTITIONS + AOE_PARTITIONS > MINORMASK) {
- printk(KERN_INFO
- "aoe: e%ld.%d: minor number too large\n",
+ printk(KERN_INFO "aoe: e%ld.%d: minor number too large\n",
aoemajor, (int) h->minor);
return;
}
- bufcnt = be16_to_cpu(ch->bufcnt);
- if (bufcnt > MAXFRAMES) /* keep it reasonable */
- bufcnt = MAXFRAMES;
+ n = be16_to_cpu(ch->bufcnt);
+ if (n > aoe_maxout) /* keep it reasonable */
+ n = aoe_maxout;
- d = aoedev_set(sysminor, h->src, skb->dev, bufcnt);
+ d = aoedev_by_sysminor_m(sysminor);
if (d == NULL) {
- printk(KERN_INFO "aoe: aoecmd_cfg_rsp: device set failure\n");
+ printk(KERN_INFO "aoe: device sysminor_m failure\n");
return;
}
spin_lock_irqsave(&d->lock, flags);
- if (d->flags & (DEVFL_UP | DEVFL_CLOSEWAIT)) {
+ t = gettgt(d, h->src);
+ if (!t) {
+ t = addtgt(d, h->src, n);
+ if (!t) {
+ spin_unlock_irqrestore(&d->lock, flags);
+ return;
+ }
+ }
+ ifp = getif(t, skb->dev);
+ if (!ifp) {
+ ifp = addif(t, skb->dev);
+ if (!ifp) {
+ printk(KERN_INFO
+ "aoe: device addif failure; "
+ "too many interfaces?\n");
+ spin_unlock_irqrestore(&d->lock, flags);
+ return;
+ }
+ }
+ if (ifp->maxbcnt) {
+ n = ifp->nd->mtu;
+ n -= sizeof (struct aoe_hdr) + sizeof (struct aoe_atahdr);
+ n /= 512;
+ if (n > ch->scnt)
+ n = ch->scnt;
+ n = n ? n * 512 : DEFAULTBCNT;
+ if (n != ifp->maxbcnt) {
+ printk(KERN_INFO
+ "aoe: e%ld.%d: setting %d%s%s:%012llx\n",
+ d->aoemajor, d->aoeminor, n,
+ " byte data frames on ", ifp->nd->name,
+ mac_addr(t->addr));
+ ifp->maxbcnt = n;
+ }
+ }
+
+ /* don't change users' perspective */
+ if (d->nopen) {
spin_unlock_irqrestore(&d->lock, flags);
return;
}
-
d->fw_ver = be16_to_cpu(ch->fwver);
- /* we get here only if the device is new */
sl = aoecmd_ata_id(d);
spin_unlock_irqrestore(&d->lock, flags);
aoenet_xmit(sl);
}
+void
+aoecmd_cleanslate(struct aoedev *d)
+{
+ struct aoetgt **t, **te;
+ struct aoeif *p, *e;
+
+ d->mintimer = MINTIMER;
+
+ t = d->targets;
+ te = t + NTARGETS;
+ for (; t < te && *t; t++) {
+ (*t)->maxout = (*t)->nframes;
+ p = (*t)->ifs;
+ e = p + NAOEIFS;
+ for (; p < e; p++) {
+ p->lostjumbo = 0;
+ p->lost = 0;
+ p->maxbcnt = DEFAULTBCNT;
+ }
+ }
+}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff