Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/aoe-2.6 (17e6c600) · Commits · e / devices / android_kernel_xiaomi_markw

drivers/block/aoe/aoe.h

+17 −13

Original line number	Diff line number	Diff line
		/* Copyright (c) 2004 Coraid, Inc. See COPYING for GPL terms. */
		#define VERSION "22"
		/* Copyright (c) 2006 Coraid, Inc. See COPYING for GPL terms. */
		#define VERSION "32"
		#define AOE_MAJOR 152
		#define DEVICE_NAME "aoe"

		@@ -65,7 +65,7 @@ struct aoe_atahdr {
		struct aoe_cfghdr {
		__be16 bufcnt;
		__be16 fwver;
		unsigned char res;
		unsigned char scnt;
		unsigned char aoeccmd;
		unsigned char cslen[2];
		};
		@@ -78,12 +78,14 @@ enum {
		DEVFL_GDALLOC = (1<<4), /* need to alloc gendisk */
		DEVFL_PAUSE = (1<<5),
		DEVFL_NEWSIZE = (1<<6), /* need to update dev size in block layer */
		DEVFL_MAXBCNT = (1<<7), /* d->maxbcnt is not changeable */
		DEVFL_KICKME = (1<<8),

		BUFFL_FAIL = 1,
		};

		enum {
		MAXATADATA = 1024,
		DEFAULTBCNT = 2 * 512, /* 2 sectors */
		NPERSHELF = 16, /* number of slots per shelf address */
		FREETAG = -1,
		MIN_BUFS = 8,
		@@ -107,11 +109,9 @@ struct frame {
		ulong waited;
		struct buf *buf;
		char *bufaddr;
		int writedatalen;
		int ndata;

		/* largest possible */
		unsigned char data[sizeof(struct aoe_hdr) + sizeof(struct aoe_atahdr)];
		ulong bcnt;
		sector_t lba;
		struct sk_buff *skb;
		};

		struct aoedev {
		@@ -121,9 +121,12 @@ struct aoedev {
		ulong sysminor;
		ulong aoemajor;
		ulong aoeminor;
		ulong nopen; /* (bd_openers isn't available without sleeping) */
		ulong rttavg; /* round trip average of requests/responses */
		u16 nopen; /* (bd_openers isn't available without sleeping) */
		u16 lasttag; /* last tag sent */
		u16 rttavg; /* round trip average of requests/responses */
		u16 mintimer;
		u16 fw_ver; /* version of blade's firmware */
		u16 maxbcnt;
		struct work_struct work;/* disk create work struct */
		struct gendisk *gd;
		request_queue_t blkq;
		@@ -137,8 +140,8 @@ struct aoedev {
		mempool_t bufpool; / for deadlock-free Buf allocation */
		struct list_head bufq; /* queue of bios to work on */
		struct buf inprocess; / the one we're currently working on */
		ulong lasttag; /* last tag sent */
		ulong nframes; /* number of frames below */
		ushort lostjumbo;
		ushort nframes; /* number of frames below */
		struct frame *frames;
		};

		@@ -157,6 +160,7 @@ void aoecmd_cfg(ushort aoemajor, unsigned char aoeminor);
		void aoecmd_ata_rsp(struct sk_buff *);
		void aoecmd_cfg_rsp(struct sk_buff *);
		void aoecmd_sleepwork(void *vp);
		struct sk_buff *new_skb(ulong);

		int aoedev_init(void);
		void aoedev_exit(void);

drivers/block/aoe/aoeblk.c

+24 −20

Original line number	Diff line number	Diff line
		/* Copyright (c) 2004 Coraid, Inc. See COPYING for GPL terms. */
		/* Copyright (c) 2006 Coraid, Inc. See COPYING for GPL terms. */
		/*
		* aoeblk.c
		* block device routines
		@@ -14,7 +14,6 @@

		static kmem_cache_t *buf_pool_cache;

		/* add attributes for our block devices in sysfs */
		static ssize_t aoedisk_show_state(struct gendisk * disk, char *page)
		{
		struct aoedev *d = disk->private_data;
		@@ -64,21 +63,26 @@ static struct disk_attribute disk_attr_fwver = {
		.show = aoedisk_show_fwver
		};

		static void
		static struct attribute *aoe_attrs[] = {
		&disk_attr_state.attr,
		&disk_attr_mac.attr,
		&disk_attr_netif.attr,
		&disk_attr_fwver.attr,
		};

		static const struct attribute_group attr_group = {
		.attrs = aoe_attrs,
		};

		static int
		aoedisk_add_sysfs(struct aoedev *d)
		{
		sysfs_create_file(&d->gd->kobj, &disk_attr_state.attr);
		sysfs_create_file(&d->gd->kobj, &disk_attr_mac.attr);
		sysfs_create_file(&d->gd->kobj, &disk_attr_netif.attr);
		sysfs_create_file(&d->gd->kobj, &disk_attr_fwver.attr);
		return sysfs_create_group(&d->gd->kobj, &attr_group);
		}
		void
		aoedisk_rm_sysfs(struct aoedev *d)
		{
		sysfs_remove_link(&d->gd->kobj, "state");
		sysfs_remove_link(&d->gd->kobj, "mac");
		sysfs_remove_link(&d->gd->kobj, "netif");
		sysfs_remove_link(&d->gd->kobj, "firmware-version");
		sysfs_remove_group(&d->gd->kobj, &attr_group);
		}

		static int
		@@ -132,8 +136,7 @@ aoeblk_make_request(request_queue_t q, struct bio bio)
		d = bio->bi_bdev->bd_disk->private_data;
		buf = mempool_alloc(d->bufpool, GFP_NOIO);
		if (buf == NULL) {
		printk(KERN_INFO "aoe: aoeblk_make_request: buf allocation "
		"failure\n");
		printk(KERN_INFO "aoe: buf allocation failure\n");
		bio_endio(bio, bio->bi_size, -ENOMEM);
		return 0;
		}
		@@ -143,14 +146,15 @@ aoeblk_make_request(request_queue_t q, struct bio bio)
		buf->bio = bio;
		buf->resid = bio->bi_size;
		buf->sector = bio->bi_sector;
		buf->bv = buf->bio->bi_io_vec;
		buf->bv = &bio->bi_io_vec[bio->bi_idx];
		WARN_ON(buf->bv->bv_len == 0);
		buf->bv_resid = buf->bv->bv_len;
		buf->bufaddr = page_address(buf->bv->bv_page) + buf->bv->bv_offset;

		spin_lock_irqsave(&d->lock, flags);

		if ((d->flags & DEVFL_UP) == 0) {
		printk(KERN_INFO "aoe: aoeblk_make_request: device %ld.%ld is not up\n",
		printk(KERN_INFO "aoe: device %ld.%ld is not up\n",
		d->aoemajor, d->aoeminor);
		spin_unlock_irqrestore(&d->lock, flags);
		mempool_free(buf, d->bufpool);
		@@ -176,7 +180,7 @@ aoeblk_getgeo(struct block_device bdev, struct hd_geometry geo)
		struct aoedev *d = bdev->bd_disk->private_data;

		if ((d->flags & DEVFL_UP) == 0) {
		printk(KERN_ERR "aoe: aoeblk_ioctl: disk not up\n");
		printk(KERN_ERR "aoe: disk not up\n");
		return -ENODEV;
		}

		@@ -203,8 +207,8 @@ aoeblk_gdalloc(void *vp)

		gd = alloc_disk(AOE_PARTITIONS);
		if (gd == NULL) {
		printk(KERN_ERR "aoe: aoeblk_gdalloc: cannot allocate disk "
		"structure for %ld.%ld\n", d->aoemajor, d->aoeminor);
		printk(KERN_ERR "aoe: cannot allocate disk structure for %ld.%ld\n",
		d->aoemajor, d->aoeminor);
		spin_lock_irqsave(&d->lock, flags);
		d->flags &= ~DEVFL_GDALLOC;
		spin_unlock_irqrestore(&d->lock, flags);
		@@ -213,8 +217,8 @@ aoeblk_gdalloc(void *vp)

		d->bufpool = mempool_create_slab_pool(MIN_BUFS, buf_pool_cache);
		if (d->bufpool == NULL) {
		printk(KERN_ERR "aoe: aoeblk_gdalloc: cannot allocate bufpool "
		"for %ld.%ld\n", d->aoemajor, d->aoeminor);
		printk(KERN_ERR "aoe: cannot allocate bufpool for %ld.%ld\n",
		d->aoemajor, d->aoeminor);
		put_disk(gd);
		spin_lock_irqsave(&d->lock, flags);
		d->flags &= ~DEVFL_GDALLOC;

drivers/block/aoe/aoechr.c

+8 −10

Original line number	Diff line number	Diff line
		/* Copyright (c) 2004 Coraid, Inc. See COPYING for GPL terms. */
		/* Copyright (c) 2006 Coraid, Inc. See COPYING for GPL terms. */
		/*
		* aoechr.c
		* AoE character device driver
		@@ -15,7 +15,6 @@ enum {
		MINOR_INTERFACES,
		MINOR_REVALIDATE,
		MSGSZ = 2048,
		NARGS = 10,
		NMSG = 100, /* message backlog to retain */
		};

		@@ -56,9 +55,8 @@ static int
		interfaces(const char __user *str, size_t size)
		{
		if (set_aoe_iflist(str, size)) {
		printk(KERN_CRIT
		"%s: could not set interface list: %s\n",
		__FUNCTION__, "too many interfaces");
		printk(KERN_ERR
		"aoe: could not set interface list: too many interfaces\n");
		return -EINVAL;
		}
		return 0;
		@@ -81,8 +79,7 @@ revalidate(const char __user *str, size_t size)
		/* should be e%d.%d format */
		n = sscanf(buf, "e%d.%d", &major, &minor);
		if (n != 2) {
		printk(KERN_ERR "aoe: %s: invalid device specification\n",
		__FUNCTION__);
		printk(KERN_ERR "aoe: invalid device specification\n");
		return -EINVAL;
		}
		d = aoedev_by_aoeaddr(major, minor);
		@@ -90,6 +87,7 @@ revalidate(const char __user *str, size_t size)
		return -EINVAL;

		spin_lock_irqsave(&d->lock, flags);
		d->flags &= ~DEVFL_MAXBCNT;
		d->flags \|= DEVFL_PAUSE;
		spin_unlock_irqrestore(&d->lock, flags);
		aoecmd_cfg(major, minor);
		@@ -116,7 +114,7 @@ bail: spin_unlock_irqrestore(&emsgs_lock, flags);

		mp = kmalloc(n, GFP_ATOMIC);
		if (mp == NULL) {
		printk(KERN_CRIT "aoe: aoechr_error: allocation failure, len=%ld\n", n);
		printk(KERN_ERR "aoe: allocation failure, len=%ld\n", n);
		goto bail;
		}

		@@ -141,7 +139,7 @@ aoechr_write(struct file filp, const char __user buf, size_t cnt, loff_t *offp

		switch ((unsigned long) filp->private_data) {
		default:
		printk(KERN_INFO "aoe: aoechr_write: can't write to that file.\n");
		printk(KERN_INFO "aoe: can't write to that file.\n");
		break;
		case MINOR_DISCOVER:
		ret = discover();
		@@ -250,7 +248,7 @@ aoechr_init(void)

		n = register_chrdev(AOE_MAJOR, "aoechr", &aoe_fops);
		if (n < 0) {
		printk(KERN_ERR "aoe: aoechr_init: can't register char device\n");
		printk(KERN_ERR "aoe: can't register char device\n");
		return n;
		}
		sema_init(&emsgs_sema, 0);

drivers/block/aoe/aoecmd.c

+196 −107

Original line number	Diff line number	Diff line
		/* Copyright (c) 2004 Coraid, Inc. See COPYING for GPL terms. */
		/* Copyright (c) 2006 Coraid, Inc. See COPYING for GPL terms. */
		/*
		* aoecmd.c
		* Filesystem request handling methods
		@@ -15,17 +15,19 @@
		#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 struct sk_buff *
		new_skb(struct net_device *if_dev, ulong len)
		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.");

		struct sk_buff *
		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->protocol = __constant_htons(ETH_P_AOE);
		skb->priority = 0;
		skb_put(skb, len);
		@@ -40,29 +42,6 @@ new_skb(struct net_device *if_dev, ulong len)
		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)
		{
		@@ -107,6 +86,17 @@ aoehdr_atainit(struct aoedev d, struct aoe_hdr h)
		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
		aoecmd_ata_rw(struct aoedev d, struct frame f)
		{
		@@ -125,29 +115,27 @@ aoecmd_ata_rw(struct aoedev d, struct frame f)

		sector = buf->sector;
		bcnt = buf->bv_resid;
		if (bcnt > MAXATADATA)
		bcnt = MAXATADATA;
		if (bcnt > d->maxbcnt)
		bcnt = d->maxbcnt;

		/* initialize the headers & frame */
		h = (struct aoe_hdr *) f->data;
		skb = f->skb;
		h = (struct aoe_hdr *) skb->mac.raw;
		ah = (struct aoe_atahdr *) (h+1);
		f->ndata = sizeof h + sizeof ah;
		memset(h, 0, f->ndata);
		skb->len = sizeof h + sizeof ah;
		memset(h, 0, ETH_ZLEN);
		f->tag = aoehdr_atainit(d, h);
		f->waited = 0;
		f->buf = buf;
		f->bufaddr = buf->bufaddr;
		f->bcnt = bcnt;
		f->lba = 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, sector);
		if (d->flags & DEVFL_EXT) {
		ah->aflags \|= AOEAFL_EXT;
		ah->lba4 = sector >>= 8;
		ah->lba5 = sector >>= 8;
		} else {
		extbit = 0;
		ah->lba3 &= 0x0f;
		@@ -155,11 +143,14 @@ aoecmd_ata_rw(struct aoedev d, struct frame f)
		}

		if (bio_data_dir(buf->bio) == WRITE) {
		skb_fill_page_desc(skb, 0, virt_to_page(f->bufaddr),
		offset_in_page(f->bufaddr), bcnt);
		ah->aflags \|= AOEAFL_WRITE;
		f->writedatalen = bcnt;
		skb->len += bcnt;
		skb->data_len = bcnt;
		} else {
		skb->len = ETH_ZLEN;
		writebit = 0;
		f->writedatalen = 0;
		}

		ah->cmdstat = WIN_READ \| writebit \| extbit;
		@@ -168,27 +159,28 @@ aoecmd_ata_rw(struct aoedev d, struct frame f)
		buf->nframesout += 1;
		buf->bufaddr += bcnt;
		buf->bv_resid -= bcnt;
		/* printk(KERN_INFO "aoe: bv_resid=%ld\n", buf->bv_resid); */
		/* printk(KERN_DEBUG "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++;
		WARN_ON(buf->bv->bv_len == 0);
		buf->bv_resid = buf->bv->bv_len;
		buf->bufaddr = page_address(buf->bv->bv_page) + buf->bv->bv_offset;
		}

		skb = skb_prepare(d, f);
		if (skb) {
		skb->next = NULL;
		skb->dev = d->ifp;
		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;
		}
		}

		/* some callers cannot sleep, and they can call this function,
		* transmitting the packets later, when interrupts are on
		@@ -209,11 +201,12 @@ aoecmd_cfg_pkts(ushort aoemajor, unsigned char aoeminor, struct sk_buff **tail)
		if (!is_aoe_netif(ifp))
		continue;

		skb = new_skb(ifp, sizeof h + sizeof ch);
		skb = new_skb(sizeof h + sizeof ch);
		if (skb == NULL) {
		printk(KERN_INFO "aoe: aoecmd_cfg: skb alloc failure\n");
		printk(KERN_INFO "aoe: skb alloc failure\n");
		continue;
		}
		skb->dev = ifp;
		if (sl_tail == NULL)
		sl_tail = skb;
		h = (struct aoe_hdr *) skb->mac.raw;
		@@ -237,6 +230,29 @@ aoecmd_cfg_pkts(ushort aoemajor, unsigned char aoeminor, struct sk_buff **tail)
		return sl;
		}

		static struct frame *
		freeframe(struct aoedev *d)
		{
		struct frame f, e;
		int n = 0;

		f = d->frames;
		e = f + d->nframes;
		for (; f<e; f++) {
		if (f->tag != FREETAG)
		continue;
		if (atomic_read(&skb_shinfo(f->skb)->dataref) == 1) {
		skb_shinfo(f->skb)->nr_frags = f->skb->data_len = 0;
		return f;
		}
		n++;
		}
		if (n == d->nframes) /* wait for network layer */
		d->flags \|= DEVFL_KICKME;

		return NULL;
		}

		/* enters with d->lock held */
		void
		aoecmd_work(struct aoedev *d)
		@@ -252,7 +268,7 @@ aoecmd_work(struct aoedev *d)
		}

		loop:
		f = getframe(d, FREETAG);
		f = freeframe(d);
		if (f == NULL)
		return;
		if (d->inprocess == NULL) {
		@@ -260,7 +276,7 @@ loop:
		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); /
		/printk(KERN_DEBUG "aoe: bi_size=%ld\n", buf->bio->bi_size); /
		d->inprocess = buf;
		}
		aoecmd_ata_rw(d, f);
		@@ -272,6 +288,7 @@ rexmit(struct aoedev d, struct frame f)
		{
		struct sk_buff *skb;
		struct aoe_hdr *h;
		struct aoe_atahdr *ah;
		char buf[128];
		u32 n;

		@@ -283,22 +300,42 @@ rexmit(struct aoedev d, struct frame f)
		d->aoemajor, d->aoeminor, f->tag, jiffies, n);
		aoechr_error(buf);

		h = (struct aoe_hdr *) f->data;
		skb = f->skb;
		h = (struct aoe_hdr *) skb->mac.raw;
		ah = (struct aoe_atahdr *) (h+1);
		f->tag = n;
		h->tag = cpu_to_be32(n);
		memcpy(h->dst, d->addr, sizeof h->dst);
		memcpy(h->src, d->ifp->dev_addr, sizeof h->src);

		skb = skb_prepare(d, f);
		if (skb) {
		skb->next = NULL;
		n = DEFAULTBCNT / 512;
		if (ah->scnt > n) {
		ah->scnt = n;
		if (ah->aflags & AOEAFL_WRITE) {
		skb_fill_page_desc(skb, 0, virt_to_page(f->bufaddr),
		offset_in_page(f->bufaddr), DEFAULTBCNT);
		skb->len = sizeof h + sizeof ah + DEFAULTBCNT;
		skb->data_len = DEFAULTBCNT;
		}
		if (++d->lostjumbo > (d->nframes << 1))
		if (d->maxbcnt != DEFAULTBCNT) {
		printk(KERN_INFO "aoe: e%ld.%ld: too many lost jumbo on %s - using 1KB frames.\n",
		d->aoemajor, d->aoeminor, d->ifp->name);
		d->maxbcnt = DEFAULTBCNT;
		d->flags \|= DEVFL_MAXBCNT;
		}
		}

		skb->dev = d->ifp;
		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
		tsince(int tag)
		@@ -340,13 +377,17 @@ rexmit_timer(ulong vp)
		if (f->tag != FREETAG && tsince(f->tag) >= timeout) {
		n = f->waited += timeout;
		n /= HZ;
		if (n > MAXWAIT) { /* waited too long. device failure. */
		if (n > aoe_deadsecs) { /* waited too long for response */
		aoedev_downdev(d);
		break;
		}
		rexmit(d, f);
		}
		}
		if (d->flags & DEVFL_KICKME) {
		d->flags &= ~DEVFL_KICKME;
		aoecmd_work(d);
		}

		sl = d->sendq_hd;
		d->sendq_hd = d->sendq_tl = NULL;
		@@ -431,8 +472,8 @@ ataid_complete(struct aoedev d, unsigned char id)
		}

		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),
		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;
		@@ -442,11 +483,9 @@ ataid_complete(struct aoedev d, unsigned char id)
		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",
		printk(KERN_ERR "aoe: can't schedule work for e%lu.%lu, %s\n",
		d->aoemajor, d->aoeminor,
		"it's already on! (This really shouldn't happen).\n");
		"it's already on! This shouldn't happen.\n");
		return;
		}
		d->flags \|= DEVFL_GDALLOC;
		@@ -460,10 +499,17 @@ 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;
		@@ -474,7 +520,7 @@ 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;
		@@ -497,8 +543,10 @@ aoecmd_ata_rsp(struct sk_buff *skb)

		spin_lock_irqsave(&d->lock, flags);

		f = getframe(d, be32_to_cpu(hin->tag));
		n = be32_to_cpu(hin->tag);
		f = getframe(d, 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",
		@@ -514,26 +562,27 @@ aoecmd_ata_rsp(struct sk_buff *skb)
		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 *) f->skb->mac.raw;
		ahout = (struct aoe_atahdr *) (hout+1);
		buf = f->buf;

		if (ahout->cmdstat == WIN_IDENTIFY)
		d->flags &= ~DEVFL_PAUSE;
		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.%ld\n",
		ahout->cmdstat, ahin->cmdstat,
		d->aoemajor, d->aoeminor);
		if (buf)
		buf->flags \|= BUFFL_FAIL;
		} else {
		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",
		printk(KERN_ERR
		"aoe: runt data size in read. skb->len=%d\n",
		skb->len);
		/* fail frame f? just returning will rexmit. */
		spin_unlock_irqrestore(&d->lock, flags);
		@@ -542,19 +591,46 @@ aoecmd_ata_rsp(struct sk_buff *skb)
		memcpy(f->bufaddr, ahin+1, n);
		case WIN_WRITE:
		case WIN_WRITE_EXT:
		if (f->bcnt -= n) {
		skb = f->skb;
		f->bufaddr += n;
		put_lba(ahout, f->lba += ahout->scnt);
		n = f->bcnt;
		if (n > DEFAULTBCNT)
		n = DEFAULTBCNT;
		ahout->scnt = n >> 9;
		if (ahout->aflags & AOEAFL_WRITE) {
		skb_fill_page_desc(skb, 0,
		virt_to_page(f->bufaddr),
		offset_in_page(f->bufaddr), n);
		skb->len = sizeof hout + sizeof ahout + n;
		skb->data_len = n;
		}
		f->tag = newtag(d);
		hout->tag = cpu_to_be32(f->tag);
		skb->dev = d->ifp;
		skb = skb_clone(skb, GFP_ATOMIC);
		spin_unlock_irqrestore(&d->lock, flags);
		if (skb)
		aoenet_xmit(skb);
		return;
		}
		if (n > DEFAULTBCNT)
		d->lostjumbo = 0;
		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));
		break;
		default:
		printk(KERN_INFO "aoe: aoecmd_ata_rsp: unrecognized "
		"outbound ata command %2.2Xh for %d.%d\n",
		printk(KERN_INFO
		"aoe: unrecognized ata command %2.2Xh for %d.%d\n",
		ahout->cmdstat,
		be16_to_cpu(hin->major),
		hin->minor);
		@@ -612,33 +688,32 @@ aoecmd_ata_id(struct aoedev *d)
		struct frame *f;
		struct sk_buff *skb;

		f = getframe(d, FREETAG);
		f = freeframe(d);
		if (f == NULL) {
		printk(KERN_CRIT "aoe: aoecmd_ata_id: can't get a frame. "
		"This shouldn't happen.\n");
		printk(KERN_ERR "aoe: can't get a frame. This shouldn't happen.\n");
		return NULL;
		}

		/* initialize the headers & frame */
		h = (struct aoe_hdr *) f->data;
		skb = f->skb;
		h = (struct aoe_hdr *) skb->mac.raw;
		ah = (struct aoe_atahdr *) (h+1);
		f->ndata = sizeof h + sizeof ah;
		memset(h, 0, f->ndata);
		skb->len = ETH_ZLEN;
		memset(h, 0, ETH_ZLEN);
		f->tag = aoehdr_atainit(d, h);
		f->waited = 0;
		f->writedatalen = 0;

		/* set up ata header */
		ah->scnt = 1;
		ah->cmdstat = WIN_IDENTIFY;
		ah->lba3 = 0xa0;

		skb = skb_prepare(d, f);
		skb->dev = d->ifp;

		d->rttavg = MAXTIMER;
		d->timer.function = rexmit_timer;

		return skb;
		return skb_clone(skb, GFP_ATOMIC);
		}

		void
		@@ -648,9 +723,9 @@ aoecmd_cfg_rsp(struct sk_buff *skb)
		struct aoe_hdr *h;
		struct aoe_cfghdr *ch;
		ulong flags, sysminor, aoemajor;
		u16 bufcnt;
		struct sk_buff *sl;
		enum { MAXFRAMES = 16 };
		u16 n;

		h = (struct aoe_hdr *) skb->mac.raw;
		ch = (struct aoe_cfghdr *) (h+1);
		@@ -661,26 +736,25 @@ aoecmd_cfg_rsp(struct sk_buff *skb)
		*/
		aoemajor = be16_to_cpu(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 > MAXFRAMES) /* keep it reasonable */
		n = MAXFRAMES;

		d = aoedev_by_sysminor_m(sysminor, bufcnt);
		d = aoedev_by_sysminor_m(sysminor, n);
		if (d == NULL) {
		printk(KERN_INFO "aoe: aoecmd_cfg_rsp: device sysminor_m failure\n");
		printk(KERN_INFO "aoe: device sysminor_m failure\n");
		return;
		}

		@@ -689,6 +763,20 @@ aoecmd_cfg_rsp(struct sk_buff *skb)
		/* permit device to migrate mac and network interface */
		d->ifp = skb->dev;
		memcpy(d->addr, h->src, sizeof d->addr);
		if (!(d->flags & DEVFL_MAXBCNT)) {
		n = d->ifp->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 != d->maxbcnt) {
		printk(KERN_INFO
		"aoe: e%ld.%ld: setting %d byte data frames on %s\n",
		d->aoemajor, d->aoeminor, n, d->ifp->name);
		d->maxbcnt = n;
		}
		}

		/* don't change users' perspective */
		if (d->nopen && !(d->flags & DEVFL_PAUSE)) {
		@@ -696,6 +784,7 @@ aoecmd_cfg_rsp(struct sk_buff *skb)
		return;
		}
		d->flags \|= DEVFL_PAUSE; /* force pause */
		d->mintimer = MINTIMER;
		d->fw_ver = be16_to_cpu(ch->fwver);

		/* check for already outstanding ataid */

drivers/block/aoe/aoedev.c

+34 −18

Original line number	Diff line number	Diff line
		/* Copyright (c) 2004 Coraid, Inc. See COPYING for GPL terms. */
		/* Copyright (c) 2006 Coraid, Inc. See COPYING for GPL terms. */
		/*
		* aoedev.c
		* AoE device utility functions; maintains device list.
		@@ -20,11 +20,8 @@ aoedev_isbusy(struct aoedev *d)
		f = d->frames;
		e = f + d->nframes;
		do {
		if (f->tag != FREETAG) {
		printk(KERN_DEBUG "aoe: %ld.%ld isbusy\n",
		d->aoemajor, d->aoeminor);
		if (f->tag != FREETAG)
		return 1;
		}
		} while (++f < e);

		return 0;
		@@ -66,22 +63,32 @@ aoedev_newdev(ulong nframes)
		struct frame f, e;

		d = kzalloc(sizeof *d, GFP_ATOMIC);
		if (d == NULL)
		return NULL;
		f = kcalloc(nframes, sizeof *f, GFP_ATOMIC);
		if (f == NULL) {
		kfree(d);
		return NULL;
		}

		INIT_WORK(&d->work, aoecmd_sleepwork, d);

		switch (!d \|\| !f) {
		case 0:
		d->nframes = nframes;
		d->frames = f;
		e = f + nframes;
		for (; f<e; f++)
		for (; f<e; f++) {
		f->tag = FREETAG;

		f->skb = new_skb(ETH_ZLEN);
		if (!f->skb)
		break;
		}
		if (f == e)
		break;
		while (f > d->frames) {
		f--;
		dev_kfree_skb(f->skb);
		}
		default:
		if (f)
		kfree(f);
		if (d)
		kfree(d);
		return NULL;
		}
		INIT_WORK(&d->work, aoecmd_sleepwork, d);
		spin_lock_init(&d->lock);
		init_timer(&d->timer);
		d->timer.data = (ulong) d;
		@@ -114,6 +121,7 @@ aoedev_downdev(struct aoedev *d)
		mempool_free(buf, d->bufpool);
		bio_endio(bio, bio->bi_size, -EIO);
		}
		skb_shinfo(f->skb)->nr_frags = f->skb->data_len = 0;
		}
		d->inprocess = NULL;

		@@ -148,7 +156,7 @@ aoedev_by_sysminor_m(ulong sysminor, ulong bufcnt)
		d = aoedev_newdev(bufcnt);
		if (d == NULL) {
		spin_unlock_irqrestore(&devlist_lock, flags);
		printk(KERN_INFO "aoe: aoedev_set: aoedev_newdev failure.\n");
		printk(KERN_INFO "aoe: aoedev_newdev failure.\n");
		return NULL;
		}
		d->sysminor = sysminor;
		@@ -163,11 +171,19 @@ aoedev_by_sysminor_m(ulong sysminor, ulong bufcnt)
		static void
		aoedev_freedev(struct aoedev *d)
		{
		struct frame f, e;

		if (d->gd) {
		aoedisk_rm_sysfs(d);
		del_gendisk(d->gd);
		put_disk(d->gd);
		}
		f = d->frames;
		e = f + d->nframes;
		for (; f<e; f++) {
		skb_shinfo(f->skb)->nr_frags = 0;
		dev_kfree_skb(f->skb);
		}
		kfree(d->frames);
		if (d->bufpool)
		mempool_destroy(d->bufpool);