![Andrew Morton](/assets/img/avatar_default.png)
Cc: "Ed L. Cashin" <ecashin@coraid.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Ilya Loginov <isloginov@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Horton <phorton@bitbox.co.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
1083 lines
22 KiB
C
1083 lines
22 KiB
C
/* Copyright (c) 2007 Coraid, Inc. See COPYING for GPL terms. */
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/*
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* aoecmd.c
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* Filesystem request handling methods
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*/
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#include <linux/ata.h>
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#include <linux/hdreg.h>
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#include <linux/blkdev.h>
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#include <linux/skbuff.h>
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#include <linux/netdevice.h>
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#include <linux/genhd.h>
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#include <linux/moduleparam.h>
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#include <net/net_namespace.h>
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#include <asm/unaligned.h>
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#include "aoe.h"
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static int aoe_deadsecs = 60 * 3;
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module_param(aoe_deadsecs, int, 0644);
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MODULE_PARM_DESC(aoe_deadsecs, "After aoe_deadsecs seconds, give up and fail dev.");
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static int aoe_maxout = 16;
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module_param(aoe_maxout, int, 0644);
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MODULE_PARM_DESC(aoe_maxout,
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"Only aoe_maxout outstanding packets for every MAC on eX.Y.");
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static struct sk_buff *
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new_skb(ulong len)
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{
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struct sk_buff *skb;
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skb = alloc_skb(len, GFP_ATOMIC);
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if (skb) {
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skb_reset_mac_header(skb);
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skb_reset_network_header(skb);
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skb->protocol = __constant_htons(ETH_P_AOE);
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}
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return skb;
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}
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static struct frame *
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getframe(struct aoetgt *t, int tag)
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{
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struct frame *f, *e;
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f = t->frames;
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e = f + t->nframes;
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for (; f<e; f++)
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if (f->tag == tag)
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return f;
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return NULL;
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}
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/*
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* Leave the top bit clear so we have tagspace for userland.
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* The bottom 16 bits are the xmit tick for rexmit/rttavg processing.
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* This driver reserves tag -1 to mean "unused frame."
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*/
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static int
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newtag(struct aoetgt *t)
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{
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register ulong n;
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n = jiffies & 0xffff;
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return n |= (++t->lasttag & 0x7fff) << 16;
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}
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static int
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aoehdr_atainit(struct aoedev *d, struct aoetgt *t, struct aoe_hdr *h)
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{
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u32 host_tag = newtag(t);
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memcpy(h->src, t->ifp->nd->dev_addr, sizeof h->src);
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memcpy(h->dst, t->addr, sizeof h->dst);
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h->type = __constant_cpu_to_be16(ETH_P_AOE);
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h->verfl = AOE_HVER;
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h->major = cpu_to_be16(d->aoemajor);
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h->minor = d->aoeminor;
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h->cmd = AOECMD_ATA;
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h->tag = cpu_to_be32(host_tag);
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return host_tag;
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}
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static inline void
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put_lba(struct aoe_atahdr *ah, sector_t lba)
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{
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ah->lba0 = lba;
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ah->lba1 = lba >>= 8;
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ah->lba2 = lba >>= 8;
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ah->lba3 = lba >>= 8;
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ah->lba4 = lba >>= 8;
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ah->lba5 = lba >>= 8;
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}
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static void
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ifrotate(struct aoetgt *t)
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{
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t->ifp++;
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if (t->ifp >= &t->ifs[NAOEIFS] || t->ifp->nd == NULL)
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t->ifp = t->ifs;
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if (t->ifp->nd == NULL) {
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printk(KERN_INFO "aoe: no interface to rotate to\n");
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BUG();
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}
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}
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static void
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skb_pool_put(struct aoedev *d, struct sk_buff *skb)
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{
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__skb_queue_tail(&d->skbpool, skb);
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}
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static struct sk_buff *
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skb_pool_get(struct aoedev *d)
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{
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struct sk_buff *skb = skb_peek(&d->skbpool);
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if (skb && atomic_read(&skb_shinfo(skb)->dataref) == 1) {
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__skb_unlink(skb, &d->skbpool);
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return skb;
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}
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if (skb_queue_len(&d->skbpool) < NSKBPOOLMAX &&
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(skb = new_skb(ETH_ZLEN)))
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return skb;
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return NULL;
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}
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/* freeframe is where we do our load balancing so it's a little hairy. */
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static struct frame *
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freeframe(struct aoedev *d)
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{
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struct frame *f, *e, *rf;
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struct aoetgt **t;
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struct sk_buff *skb;
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if (d->targets[0] == NULL) { /* shouldn't happen, but I'm paranoid */
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printk(KERN_ERR "aoe: NULL TARGETS!\n");
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return NULL;
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}
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t = d->tgt;
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t++;
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if (t >= &d->targets[NTARGETS] || !*t)
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t = d->targets;
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for (;;) {
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if ((*t)->nout < (*t)->maxout
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&& t != d->htgt
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&& (*t)->ifp->nd) {
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rf = NULL;
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f = (*t)->frames;
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e = f + (*t)->nframes;
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for (; f < e; f++) {
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if (f->tag != FREETAG)
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continue;
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skb = f->skb;
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if (!skb
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&& !(f->skb = skb = new_skb(ETH_ZLEN)))
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continue;
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if (atomic_read(&skb_shinfo(skb)->dataref)
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!= 1) {
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if (!rf)
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rf = f;
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continue;
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}
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gotone: skb_shinfo(skb)->nr_frags = skb->data_len = 0;
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skb_trim(skb, 0);
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d->tgt = t;
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ifrotate(*t);
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return f;
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}
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/* Work can be done, but the network layer is
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holding our precious packets. Try to grab
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one from the pool. */
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f = rf;
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if (f == NULL) { /* more paranoia */
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printk(KERN_ERR
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"aoe: freeframe: %s.\n",
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"unexpected null rf");
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d->flags |= DEVFL_KICKME;
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return NULL;
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}
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skb = skb_pool_get(d);
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if (skb) {
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skb_pool_put(d, f->skb);
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f->skb = skb;
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goto gotone;
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}
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(*t)->dataref++;
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if ((*t)->nout == 0)
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d->flags |= DEVFL_KICKME;
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}
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if (t == d->tgt) /* we've looped and found nada */
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break;
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t++;
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if (t >= &d->targets[NTARGETS] || !*t)
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t = d->targets;
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}
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return NULL;
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}
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static int
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aoecmd_ata_rw(struct aoedev *d)
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{
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struct frame *f;
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struct aoe_hdr *h;
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struct aoe_atahdr *ah;
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struct buf *buf;
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struct bio_vec *bv;
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struct aoetgt *t;
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struct sk_buff *skb;
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ulong bcnt;
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char writebit, extbit;
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writebit = 0x10;
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extbit = 0x4;
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f = freeframe(d);
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if (f == NULL)
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return 0;
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t = *d->tgt;
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buf = d->inprocess;
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bv = buf->bv;
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bcnt = t->ifp->maxbcnt;
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if (bcnt == 0)
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bcnt = DEFAULTBCNT;
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if (bcnt > buf->bv_resid)
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bcnt = buf->bv_resid;
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/* initialize the headers & frame */
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skb = f->skb;
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h = (struct aoe_hdr *) skb_mac_header(skb);
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ah = (struct aoe_atahdr *) (h+1);
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skb_put(skb, sizeof *h + sizeof *ah);
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memset(h, 0, skb->len);
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f->tag = aoehdr_atainit(d, t, h);
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t->nout++;
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f->waited = 0;
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f->buf = buf;
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f->bufaddr = page_address(bv->bv_page) + buf->bv_off;
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f->bcnt = bcnt;
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f->lba = buf->sector;
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/* set up ata header */
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ah->scnt = bcnt >> 9;
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put_lba(ah, buf->sector);
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if (d->flags & DEVFL_EXT) {
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ah->aflags |= AOEAFL_EXT;
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} else {
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extbit = 0;
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ah->lba3 &= 0x0f;
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ah->lba3 |= 0xe0; /* LBA bit + obsolete 0xa0 */
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}
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if (bio_data_dir(buf->bio) == WRITE) {
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skb_fill_page_desc(skb, 0, bv->bv_page, buf->bv_off, bcnt);
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ah->aflags |= AOEAFL_WRITE;
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skb->len += bcnt;
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skb->data_len = bcnt;
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t->wpkts++;
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} else {
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t->rpkts++;
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writebit = 0;
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}
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ah->cmdstat = ATA_CMD_PIO_READ | writebit | extbit;
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/* mark all tracking fields and load out */
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buf->nframesout += 1;
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buf->bv_off += bcnt;
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buf->bv_resid -= bcnt;
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buf->resid -= bcnt;
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buf->sector += bcnt >> 9;
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if (buf->resid == 0) {
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d->inprocess = NULL;
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} else if (buf->bv_resid == 0) {
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buf->bv = ++bv;
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buf->bv_resid = bv->bv_len;
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WARN_ON(buf->bv_resid == 0);
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buf->bv_off = bv->bv_offset;
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}
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skb->dev = t->ifp->nd;
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skb = skb_clone(skb, GFP_ATOMIC);
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if (skb)
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__skb_queue_tail(&d->sendq, skb);
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return 1;
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}
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/* some callers cannot sleep, and they can call this function,
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* transmitting the packets later, when interrupts are on
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*/
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static void
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aoecmd_cfg_pkts(ushort aoemajor, unsigned char aoeminor, struct sk_buff_head *queue)
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{
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struct aoe_hdr *h;
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struct aoe_cfghdr *ch;
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struct sk_buff *skb;
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struct net_device *ifp;
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read_lock(&dev_base_lock);
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for_each_netdev(&init_net, ifp) {
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dev_hold(ifp);
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if (!is_aoe_netif(ifp))
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goto cont;
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skb = new_skb(sizeof *h + sizeof *ch);
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if (skb == NULL) {
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printk(KERN_INFO "aoe: skb alloc failure\n");
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goto cont;
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}
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skb_put(skb, sizeof *h + sizeof *ch);
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skb->dev = ifp;
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__skb_queue_tail(queue, skb);
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h = (struct aoe_hdr *) skb_mac_header(skb);
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memset(h, 0, sizeof *h + sizeof *ch);
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memset(h->dst, 0xff, sizeof h->dst);
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memcpy(h->src, ifp->dev_addr, sizeof h->src);
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h->type = __constant_cpu_to_be16(ETH_P_AOE);
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h->verfl = AOE_HVER;
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h->major = cpu_to_be16(aoemajor);
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h->minor = aoeminor;
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h->cmd = AOECMD_CFG;
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cont:
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dev_put(ifp);
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}
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read_unlock(&dev_base_lock);
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}
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static void
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resend(struct aoedev *d, struct aoetgt *t, struct frame *f)
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{
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struct sk_buff *skb;
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struct aoe_hdr *h;
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struct aoe_atahdr *ah;
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char buf[128];
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u32 n;
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ifrotate(t);
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n = newtag(t);
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skb = f->skb;
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h = (struct aoe_hdr *) skb_mac_header(skb);
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ah = (struct aoe_atahdr *) (h+1);
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snprintf(buf, sizeof buf,
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"%15s e%ld.%d oldtag=%08x@%08lx newtag=%08x s=%pm d=%pm nout=%d\n",
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"retransmit", d->aoemajor, d->aoeminor, f->tag, jiffies, n,
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h->src, h->dst, t->nout);
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aoechr_error(buf);
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f->tag = n;
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h->tag = cpu_to_be32(n);
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memcpy(h->dst, t->addr, sizeof h->dst);
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memcpy(h->src, t->ifp->nd->dev_addr, sizeof h->src);
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switch (ah->cmdstat) {
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default:
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break;
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case ATA_CMD_PIO_READ:
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case ATA_CMD_PIO_READ_EXT:
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case ATA_CMD_PIO_WRITE:
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case ATA_CMD_PIO_WRITE_EXT:
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put_lba(ah, f->lba);
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n = f->bcnt;
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if (n > DEFAULTBCNT)
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n = DEFAULTBCNT;
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ah->scnt = n >> 9;
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if (ah->aflags & AOEAFL_WRITE) {
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skb_fill_page_desc(skb, 0, virt_to_page(f->bufaddr),
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offset_in_page(f->bufaddr), n);
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skb->len = sizeof *h + sizeof *ah + n;
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skb->data_len = n;
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}
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}
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skb->dev = t->ifp->nd;
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skb = skb_clone(skb, GFP_ATOMIC);
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if (skb == NULL)
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return;
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__skb_queue_tail(&d->sendq, skb);
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}
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static int
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tsince(int tag)
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{
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int n;
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n = jiffies & 0xffff;
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n -= tag & 0xffff;
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if (n < 0)
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n += 1<<16;
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return n;
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}
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static struct aoeif *
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getif(struct aoetgt *t, struct net_device *nd)
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{
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struct aoeif *p, *e;
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p = t->ifs;
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e = p + NAOEIFS;
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for (; p < e; p++)
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if (p->nd == nd)
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return p;
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return NULL;
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}
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static struct aoeif *
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addif(struct aoetgt *t, struct net_device *nd)
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{
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struct aoeif *p;
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p = getif(t, NULL);
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if (!p)
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return NULL;
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p->nd = nd;
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p->maxbcnt = DEFAULTBCNT;
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p->lost = 0;
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p->lostjumbo = 0;
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return p;
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}
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static void
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ejectif(struct aoetgt *t, struct aoeif *ifp)
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{
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struct aoeif *e;
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ulong n;
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e = t->ifs + NAOEIFS - 1;
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n = (e - ifp) * sizeof *ifp;
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memmove(ifp, ifp+1, n);
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e->nd = NULL;
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}
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static int
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sthtith(struct aoedev *d)
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{
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struct frame *f, *e, *nf;
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struct sk_buff *skb;
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struct aoetgt *ht = *d->htgt;
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f = ht->frames;
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e = f + ht->nframes;
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for (; f < e; f++) {
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if (f->tag == FREETAG)
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continue;
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nf = freeframe(d);
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if (!nf)
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return 0;
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skb = nf->skb;
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*nf = *f;
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f->skb = skb;
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f->tag = FREETAG;
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nf->waited = 0;
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ht->nout--;
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(*d->tgt)->nout++;
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resend(d, *d->tgt, nf);
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}
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/* he's clean, he's useless. take away his interfaces */
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memset(ht->ifs, 0, sizeof ht->ifs);
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d->htgt = NULL;
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return 1;
|
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}
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|
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static inline unsigned char
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ata_scnt(unsigned char *packet) {
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struct aoe_hdr *h;
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struct aoe_atahdr *ah;
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|
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h = (struct aoe_hdr *) packet;
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ah = (struct aoe_atahdr *) (h+1);
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return ah->scnt;
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}
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|
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static void
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rexmit_timer(ulong vp)
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{
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struct sk_buff_head queue;
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struct aoedev *d;
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struct aoetgt *t, **tt, **te;
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struct aoeif *ifp;
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struct frame *f, *e;
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register long timeout;
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ulong flags, n;
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d = (struct aoedev *) vp;
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|
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/* timeout is always ~150% of the moving average */
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timeout = d->rttavg;
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timeout += timeout >> 1;
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spin_lock_irqsave(&d->lock, flags);
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|
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if (d->flags & DEVFL_TKILL) {
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spin_unlock_irqrestore(&d->lock, flags);
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return;
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}
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tt = d->targets;
|
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te = tt + NTARGETS;
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for (; tt < te && *tt; tt++) {
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t = *tt;
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f = t->frames;
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e = f + t->nframes;
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for (; f < e; f++) {
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if (f->tag == FREETAG
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|| tsince(f->tag) < timeout)
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continue;
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n = f->waited += timeout;
|
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n /= HZ;
|
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if (n > aoe_deadsecs) {
|
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/* waited too long. device failure. */
|
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aoedev_downdev(d);
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break;
|
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}
|
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|
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if (n > HELPWAIT /* see if another target can help */
|
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&& (tt != d->targets || d->targets[1]))
|
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d->htgt = tt;
|
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|
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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:%pm - "
|
|
"falling back to %d frames.\n",
|
|
d->aoemajor, d->aoeminor,
|
|
ifp->nd->name, 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;
|
|
}
|
|
}
|
|
|
|
if (!skb_queue_empty(&d->sendq)) {
|
|
n = d->rttavg <<= 1;
|
|
if (n > MAXTIMER)
|
|
d->rttavg = MAXTIMER;
|
|
}
|
|
|
|
if (d->flags & DEVFL_KICKME || d->htgt) {
|
|
d->flags &= ~DEVFL_KICKME;
|
|
aoecmd_work(d);
|
|
}
|
|
|
|
__skb_queue_head_init(&queue);
|
|
skb_queue_splice_init(&d->sendq, &queue);
|
|
|
|
d->timer.expires = jiffies + TIMERTICK;
|
|
add_timer(&d->timer);
|
|
|
|
spin_unlock_irqrestore(&d->lock, flags);
|
|
|
|
aoenet_xmit(&queue);
|
|
}
|
|
|
|
/* 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 = get_capacity(d->gd);
|
|
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, struct aoetgt *t, unsigned char *id)
|
|
{
|
|
u64 ssize;
|
|
u16 n;
|
|
|
|
/* word 83: command set supported */
|
|
n = get_unaligned_le16(&id[83 << 1]);
|
|
|
|
/* word 86: command set/feature enabled */
|
|
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 = get_unaligned_le64(&id[100 << 1]);
|
|
|
|
/* set as in ide-disk.c:init_idedisk_capacity */
|
|
d->geo.cylinders = ssize;
|
|
d->geo.cylinders /= (255 * 63);
|
|
d->geo.heads = 255;
|
|
d->geo.sectors = 63;
|
|
} else {
|
|
d->flags &= ~DEVFL_EXT;
|
|
|
|
/* number lba28 sectors */
|
|
ssize = get_unaligned_le32(&id[60 << 1]);
|
|
|
|
/* NOTE: obsolete in ATA 6 */
|
|
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: %pm e%ld.%d v%04x has %llu sectors\n",
|
|
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) {
|
|
set_capacity(d->gd, ssize);
|
|
d->flags |= DEVFL_NEWSIZE;
|
|
} else
|
|
d->flags |= DEVFL_GDALLOC;
|
|
schedule_work(&d->work);
|
|
}
|
|
|
|
static void
|
|
calc_rttavg(struct aoedev *d, int rtt)
|
|
{
|
|
register long n;
|
|
|
|
n = rtt;
|
|
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;
|
|
|
|
/* g == .25; cf. Congestion Avoidance and Control, Jacobson & Karels; 1988 */
|
|
n -= d->rttavg;
|
|
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;
|
|
int cpu;
|
|
|
|
cpu = part_stat_lock();
|
|
part = disk_map_sector_rcu(disk, sector);
|
|
|
|
part_stat_inc(cpu, part, ios[rw]);
|
|
part_stat_add(cpu, part, ticks[rw], duration);
|
|
part_stat_add(cpu, part, sectors[rw], n_sect);
|
|
part_stat_add(cpu, part, io_ticks, duration);
|
|
|
|
part_stat_unlock();
|
|
}
|
|
|
|
void
|
|
aoecmd_ata_rsp(struct sk_buff *skb)
|
|
{
|
|
struct sk_buff_head queue;
|
|
struct aoedev *d;
|
|
struct aoe_hdr *hin, *hout;
|
|
struct aoe_atahdr *ahin, *ahout;
|
|
struct frame *f;
|
|
struct buf *buf;
|
|
struct aoetgt *t;
|
|
struct aoeif *ifp;
|
|
register long n;
|
|
ulong flags;
|
|
char ebuf[128];
|
|
u16 aoemajor;
|
|
|
|
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 "
|
|
"for unknown device %d.%d\n",
|
|
aoemajor, hin->minor);
|
|
aoechr_error(ebuf);
|
|
return;
|
|
}
|
|
|
|
spin_lock_irqsave(&d->lock, flags);
|
|
|
|
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:%pm\n",
|
|
d->aoemajor, d->aoeminor, 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",
|
|
get_unaligned_be16(&hin->major),
|
|
hin->minor,
|
|
get_unaligned_be32(&hin->tag),
|
|
jiffies);
|
|
aoechr_error(ebuf);
|
|
return;
|
|
}
|
|
|
|
calc_rttavg(d, tsince(f->tag));
|
|
|
|
ahin = (struct aoe_atahdr *) (hin+1);
|
|
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_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 ATA_CMD_PIO_READ:
|
|
case ATA_CMD_PIO_READ_EXT:
|
|
if (skb->len - sizeof *hin - sizeof *ahin < n) {
|
|
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 ATA_CMD_PIO_WRITE:
|
|
case ATA_CMD_PIO_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 ATA_CMD_ID_ATA:
|
|
if (skb->len - sizeof *hin - sizeof *ahin < 512) {
|
|
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, t, (char *) (ahin+1));
|
|
break;
|
|
default:
|
|
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 == 0 && buf->resid == 0) {
|
|
diskstats(d->gd, buf->bio, jiffies - buf->stime, buf->sector);
|
|
if (buf->flags & BUFFL_FAIL)
|
|
bio_endio(buf->bio, -EIO);
|
|
else {
|
|
bio_flush_dcache_pages(buf->bio);
|
|
bio_endio(buf->bio, 0);
|
|
}
|
|
mempool_free(buf, d->bufpool);
|
|
}
|
|
|
|
f->buf = NULL;
|
|
f->tag = FREETAG;
|
|
t->nout--;
|
|
|
|
aoecmd_work(d);
|
|
xmit:
|
|
__skb_queue_head_init(&queue);
|
|
skb_queue_splice_init(&d->sendq, &queue);
|
|
|
|
spin_unlock_irqrestore(&d->lock, flags);
|
|
aoenet_xmit(&queue);
|
|
}
|
|
|
|
void
|
|
aoecmd_cfg(ushort aoemajor, unsigned char aoeminor)
|
|
{
|
|
struct sk_buff_head queue;
|
|
|
|
__skb_queue_head_init(&queue);
|
|
aoecmd_cfg_pkts(aoemajor, aoeminor, &queue);
|
|
aoenet_xmit(&queue);
|
|
}
|
|
|
|
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 = freeframe(d);
|
|
if (f == NULL)
|
|
return NULL;
|
|
|
|
t = *d->tgt;
|
|
|
|
/* initialize the headers & frame */
|
|
skb = f->skb;
|
|
h = (struct aoe_hdr *) skb_mac_header(skb);
|
|
ah = (struct aoe_atahdr *) (h+1);
|
|
skb_put(skb, sizeof *h + sizeof *ah);
|
|
memset(h, 0, skb->len);
|
|
f->tag = aoehdr_atainit(d, t, h);
|
|
t->nout++;
|
|
f->waited = 0;
|
|
|
|
/* set up ata header */
|
|
ah->scnt = 1;
|
|
ah->cmdstat = ATA_CMD_ID_ATA;
|
|
ah->lba3 = 0xa0;
|
|
|
|
skb->dev = t->ifp->nd;
|
|
|
|
d->rttavg = MAXTIMER;
|
|
d->timer.function = rexmit_timer;
|
|
|
|
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;
|
|
struct sk_buff *sl;
|
|
u16 n;
|
|
|
|
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 = get_unaligned_be16(&h->major);
|
|
if (aoemajor == 0xfff) {
|
|
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",
|
|
aoemajor, (int) h->minor);
|
|
return;
|
|
}
|
|
|
|
n = be16_to_cpu(ch->bufcnt);
|
|
if (n > aoe_maxout) /* keep it reasonable */
|
|
n = aoe_maxout;
|
|
|
|
d = aoedev_by_sysminor_m(sysminor);
|
|
if (d == NULL) {
|
|
printk(KERN_INFO "aoe: device sysminor_m failure\n");
|
|
return;
|
|
}
|
|
|
|
spin_lock_irqsave(&d->lock, flags);
|
|
|
|
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:%pm\n",
|
|
d->aoemajor, d->aoeminor, n,
|
|
" byte data frames on ", ifp->nd->name,
|
|
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);
|
|
|
|
sl = aoecmd_ata_id(d);
|
|
|
|
spin_unlock_irqrestore(&d->lock, flags);
|
|
|
|
if (sl) {
|
|
struct sk_buff_head queue;
|
|
__skb_queue_head_init(&queue);
|
|
__skb_queue_tail(&queue, sl);
|
|
aoenet_xmit(&queue);
|
|
}
|
|
}
|
|
|
|
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;
|
|
}
|
|
}
|
|
}
|