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Merge with kernel.org:/pub/scm/linux/kernel/git/gregkh/aoe-2.6.git/

Browse Source 
for 11 aoe bugfix patches.
This commit is contained in:
Linus Torvalds 2005-04-19 13:12:03 -07:00
commit c3c661932c
9 changed files with 110 additions and 64 deletions
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1
Documentation/aoe/mkdevs.sh
View File

@ -5,6 +5,7 @@ n_partitions=${n_partitions:-16}
if test "$#" != "1"; then
echo "Usage: sh `basename $0` {dir}" 1>&2
echo " n_partitions=16 sh `basename $0` {dir}" 1>&2
exit 1
fi
dir=$1

1
Documentation/aoe/mkshelf.sh
View File

@ -2,6 +2,7 @@
if test "$#" != "2"; then
echo "Usage: sh `basename $0` {dir} {shelfaddress}" 1>&2
echo " n_partitions=16 sh `basename $0` {dir} {shelfaddress}" 1>&2
exit 1
fi
n_partitions=${n_partitions:-16}

14
Documentation/aoe/todo.txt Normal file
View File

@ -0,0 +1,14 @@
There is a potential for deadlock when allocating a struct sk_buff for
data that needs to be written out to aoe storage. If the data is
being written from a dirty page in order to free that page, and if
there are no other pages available, then deadlock may occur when a
free page is needed for the sk_buff allocation. This situation has
not been observed, but it would be nice to eliminate any potential for
deadlock under memory pressure.
Because ATA over Ethernet is not fragmented by the kernel's IP code,
the destructore member of the struct sk_buff is available to the aoe
driver. By using a mempool for allocating all but the first few
sk_buffs, and by registering a destructor, we should be able to
efficiently allocate sk_buffs without introducing any potential for
deadlock.

6
Documentation/aoe/udev-install.sh
View File

@ -23,4 +23,8 @@ fi
# /etc/udev/rules.d
#
rules_d="`sed -n '/^udev_rules=/{ s!udev_rules=!!; s!\"!!g; p; }' $conf`"
test "$rules_d" && sh -xc "cp `dirname $0`/udev.txt $rules_d/60-aoe.rules"
if test -z "$rules_d" || test ! -d "$rules_d"; then
echo "$me Error: cannot find udev rules directory" 1>&2
exit 1
fi
sh -xc "cp `dirname $0`/udev.txt $rules_d/60-aoe.rules"

23
drivers/block/aoe/aoe.h
View File

@ -1,10 +1,15 @@
/* Copyright (c) 2004 Coraid, Inc. See COPYING for GPL terms. */
#define VERSION "5"
#define VERSION "6"
#define AOE_MAJOR 152
#define DEVICE_NAME "aoe"
/* set AOE_PARTITIONS to 1 to use whole-disks only
* default is 16, which is 15 partitions plus the whole disk
*/
#ifndef AOE_PARTITIONS
#define AOE_PARTITIONS 16
#endif
#define SYSMINOR(aoemajor, aoeminor) ((aoemajor) * 10 + (aoeminor))
#define AOEMAJOR(sysminor) ((sysminor) / 10)
#define AOEMINOR(sysminor) ((sysminor) % 10)
@ -34,13 +39,13 @@ enum {
struct aoe_hdr {
unsigned char dst[6];
unsigned char src[6];
unsigned char type[2];
__be16 type;
unsigned char verfl;
unsigned char err;
unsigned char major[2];
__be16 major;
unsigned char minor;
unsigned char cmd;
unsigned char tag[4];
__be32 tag;
};
struct aoe_atahdr {
@ -58,8 +63,8 @@ struct aoe_atahdr {
};
struct aoe_cfghdr {
unsigned char bufcnt[2];
unsigned char fwver[2];
__be16 bufcnt;
__be16 fwver;
unsigned char res;
unsigned char aoeccmd;
unsigned char cslen[2];
@ -85,6 +90,7 @@ enum {
struct buf {
struct list_head bufs;
ulong start_time; /* for disk stats */
ulong flags;
ulong nframesout;
char *bufaddr;
@ -125,7 +131,8 @@ struct aoedev {
struct timer_list timer;
spinlock_t lock;
struct net_device *ifp; /* interface ed is attached to */
struct sk_buff *skblist;/* packets needing to be sent */
struct sk_buff *sendq_hd; /* packets needing to be sent, list head */
struct sk_buff *sendq_tl;
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 */
@ -151,7 +158,7 @@ void aoecmd_cfg_rsp(struct sk_buff *);
int aoedev_init(void);
void aoedev_exit(void);
struct aoedev *aoedev_bymac(unsigned char *);
struct aoedev *aoedev_by_aoeaddr(int maj, int min);
void aoedev_downdev(struct aoedev *d);
struct aoedev *aoedev_set(ulong, unsigned char *, struct net_device *, ulong);
int aoedev_busy(void);

5
drivers/block/aoe/aoeblk.c
View File

@ -125,6 +125,7 @@ aoeblk_make_request(request_queue_t *q, struct bio *bio)
}
memset(buf, 0, sizeof(*buf));
INIT_LIST_HEAD(&buf->bufs);
buf->start_time = jiffies;
buf->bio = bio;
buf->resid = bio->bi_size;
buf->sector = bio->bi_sector;
@ -146,8 +147,8 @@ aoeblk_make_request(request_queue_t *q, struct bio *bio)
list_add_tail(&buf->bufs, &d->bufq);
aoecmd_work(d);
sl = d->skblist;
d->skblist = NULL;
sl = d->sendq_hd;
d->sendq_hd = d->sendq_tl = NULL;
spin_unlock_irqrestore(&d->lock, flags);

108
drivers/block/aoe/aoecmd.c
View File

@ -90,19 +90,16 @@ newtag(struct aoedev *d)
static int
aoehdr_atainit(struct aoedev *d, struct aoe_hdr *h)
{
u16 type = __constant_cpu_to_be16(ETH_P_AOE);
u16 aoemajor = __cpu_to_be16(d->aoemajor);
u32 host_tag = newtag(d);
u32 tag = __cpu_to_be32(host_tag);
memcpy(h->src, d->ifp->dev_addr, sizeof h->src);
memcpy(h->dst, d->addr, sizeof h->dst);
memcpy(h->type, &type, sizeof type);
h->type = __constant_cpu_to_be16(ETH_P_AOE);
h->verfl = AOE_HVER;
memcpy(h->major, &aoemajor, sizeof aoemajor);
h->major = cpu_to_be16(d->aoemajor);
h->minor = d->aoeminor;
h->cmd = AOECMD_ATA;
memcpy(h->tag, &tag, sizeof tag);
h->tag = cpu_to_be32(host_tag);
return host_tag;
}
@ -181,8 +178,12 @@ aoecmd_ata_rw(struct aoedev *d, struct frame *f)
skb = skb_prepare(d, f);
if (skb) {
skb->next = d->skblist;
d->skblist = skb;
skb->next = NULL;
if (d->sendq_hd)
d->sendq_tl->next = skb;
else
d->sendq_hd = skb;
d->sendq_tl = skb;
}
}
@ -215,7 +216,6 @@ rexmit(struct aoedev *d, struct frame *f)
struct aoe_hdr *h;
char buf[128];
u32 n;
u32 net_tag;
n = newtag(d);
@ -227,13 +227,16 @@ rexmit(struct aoedev *d, struct frame *f)
h = (struct aoe_hdr *) f->data;
f->tag = n;
net_tag = __cpu_to_be32(n);
memcpy(h->tag, &net_tag, sizeof net_tag);
h->tag = cpu_to_be32(n);
skb = skb_prepare(d, f);
if (skb) {
skb->next = d->skblist;
d->skblist = skb;
skb->next = NULL;
if (d->sendq_hd)
d->sendq_tl->next = skb;
else
d->sendq_hd = skb;
d->sendq_tl = skb;
}
}
@ -285,8 +288,8 @@ tdie: spin_unlock_irqrestore(&d->lock, flags);
}
}
sl = d->skblist;
d->skblist = NULL;
sl = d->sendq_hd;
d->sendq_hd = d->sendq_tl = NULL;
if (sl) {
n = d->rttavg <<= 1;
if (n > MAXTIMER)
@ -308,16 +311,16 @@ ataid_complete(struct aoedev *d, unsigned char *id)
u16 n;
/* word 83: command set supported */
n = __le16_to_cpu(*((u16 *) &id[83<<1]));
n = le16_to_cpup((__le16 *) &id[83<<1]);
/* word 86: command set/feature enabled */
n |= __le16_to_cpu(*((u16 *) &id[86<<1]));
n |= le16_to_cpup((__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(*((u64 *) &id[100<<1]));
ssize = le64_to_cpup((__le64 *) &id[100<<1]);
/* set as in ide-disk.c:init_idedisk_capacity */
d->geo.cylinders = ssize;
@ -328,12 +331,12 @@ ataid_complete(struct aoedev *d, unsigned char *id)
d->flags &= ~DEVFL_EXT;
/* number lba28 sectors */
ssize = __le32_to_cpu(*((u32 *) &id[60<<1]));
ssize = le32_to_cpup((__le32 *) &id[60<<1]);
/* NOTE: obsolete in ATA 6 */
d->geo.cylinders = __le16_to_cpu(*((u16 *) &id[54<<1]));
d->geo.heads = __le16_to_cpu(*((u16 *) &id[55<<1]));
d->geo.sectors = __le16_to_cpu(*((u16 *) &id[56<<1]));
d->geo.cylinders = le16_to_cpup((__le16 *) &id[54<<1]);
d->geo.heads = le16_to_cpup((__le16 *) &id[55<<1]);
d->geo.sectors = le16_to_cpup((__le16 *) &id[56<<1]);
}
d->ssize = ssize;
d->geo.start = 0;
@ -380,29 +383,30 @@ aoecmd_ata_rsp(struct sk_buff *skb)
register long n;
ulong flags;
char ebuf[128];
u16 aoemajor;
hin = (struct aoe_hdr *) skb->mac.raw;
d = aoedev_bymac(hin->src);
aoemajor = be16_to_cpu(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",
__be16_to_cpu(*((u16 *) hin->major)),
hin->minor);
aoemajor, hin->minor);
aoechr_error(ebuf);
return;
}
spin_lock_irqsave(&d->lock, flags);
f = getframe(d, __be32_to_cpu(*((u32 *) hin->tag)));
f = getframe(d, be32_to_cpu(hin->tag));
if (f == NULL) {
spin_unlock_irqrestore(&d->lock, flags);
snprintf(ebuf, sizeof ebuf,
"%15s e%d.%d tag=%08x@%08lx\n",
"unexpected rsp",
__be16_to_cpu(*((u16 *) hin->major)),
be16_to_cpu(hin->major),
hin->minor,
__be32_to_cpu(*((u32 *) hin->tag)),
be32_to_cpu(hin->tag),
jiffies);
aoechr_error(ebuf);
return;
@ -452,7 +456,7 @@ aoecmd_ata_rsp(struct sk_buff *skb)
printk(KERN_INFO "aoe: aoecmd_ata_rsp: unrecognized "
"outbound ata command %2.2Xh for %d.%d\n",
ahout->cmdstat,
__be16_to_cpu(*((u16 *) hin->major)),
be16_to_cpu(hin->major),
hin->minor);
}
}
@ -460,6 +464,20 @@ aoecmd_ata_rsp(struct sk_buff *skb)
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;
if (bio_data_dir(buf->bio) == WRITE) {
disk_stat_inc(disk, writes);
disk_stat_add(disk, write_ticks, duration);
disk_stat_add(disk, write_sectors, n_sect);
} else {
disk_stat_inc(disk, reads);
disk_stat_add(disk, read_ticks, duration);
disk_stat_add(disk, read_sectors, 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);
@ -471,8 +489,8 @@ aoecmd_ata_rsp(struct sk_buff *skb)
aoecmd_work(d);
sl = d->skblist;
d->skblist = NULL;
sl = d->sendq_hd;
d->sendq_hd = d->sendq_tl = NULL;
spin_unlock_irqrestore(&d->lock, flags);
@ -486,8 +504,6 @@ aoecmd_cfg(ushort aoemajor, unsigned char aoeminor)
struct aoe_cfghdr *ch;
struct sk_buff *skb, *sl;
struct net_device *ifp;
u16 aoe_type = __constant_cpu_to_be16(ETH_P_AOE);
u16 net_aoemajor = __cpu_to_be16(aoemajor);
sl = NULL;
@ -507,9 +523,9 @@ aoecmd_cfg(ushort aoemajor, unsigned char aoeminor)
memset(h->dst, 0xff, sizeof h->dst);
memcpy(h->src, ifp->dev_addr, sizeof h->src);
memcpy(h->type, &aoe_type, sizeof aoe_type);
h->type = __constant_cpu_to_be16(ETH_P_AOE);
h->verfl = AOE_HVER;
memcpy(h->major, &net_aoemajor, sizeof net_aoemajor);
h->major = cpu_to_be16(aoemajor);
h->minor = aoeminor;
h->cmd = AOECMD_CFG;
@ -523,7 +539,7 @@ aoecmd_cfg(ushort aoemajor, unsigned char aoeminor)
/*
* 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 d->skblist.
* we just return the skb. Usually we'd chain it up to the aoedev sendq.
*/
static struct sk_buff *
aoecmd_ata_id(struct aoedev *d)
@ -575,9 +591,10 @@ aoecmd_cfg_rsp(struct sk_buff *skb)
struct aoedev *d;
struct aoe_hdr *h;
struct aoe_cfghdr *ch;
ulong flags, bufcnt, sysminor, aoemajor;
ulong flags, sysminor, aoemajor;
u16 bufcnt;
struct sk_buff *sl;
enum { MAXFRAMES = 8, MAXSYSMINOR = 255 };
enum { MAXFRAMES = 8 };
h = (struct aoe_hdr *) skb->mac.raw;
ch = (struct aoe_cfghdr *) (h+1);
@ -586,7 +603,7 @@ aoecmd_cfg_rsp(struct sk_buff *skb)
* Enough people have their dip switches set backwards to
* warrant a loud message for this special case.
*/
aoemajor = __be16_to_cpu(*((u16 *) h->major));
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");
@ -594,13 +611,14 @@ aoecmd_cfg_rsp(struct sk_buff *skb)
}
sysminor = SYSMINOR(aoemajor, h->minor);
if (sysminor > MAXSYSMINOR) {
printk(KERN_INFO "aoe: aoecmd_cfg_rsp: sysminor %ld too "
"large\n", sysminor);
if (sysminor * AOE_PARTITIONS + AOE_PARTITIONS > MINORMASK) {
printk(KERN_INFO
"aoe: e%ld.%d: minor number too large\n",
aoemajor, (int) h->minor);
return;
}
bufcnt = __be16_to_cpu(*((u16 *) ch->bufcnt));
bufcnt = be16_to_cpu(ch->bufcnt);
if (bufcnt > MAXFRAMES) /* keep it reasonable */
bufcnt = MAXFRAMES;
@ -617,7 +635,7 @@ aoecmd_cfg_rsp(struct sk_buff *skb)
return;
}
d->fw_ver = __be16_to_cpu(*((u16 *) ch->fwver));
d->fw_ver = be16_to_cpu(ch->fwver);
/* we get here only if the device is new */
sl = aoecmd_ata_id(d);

8
drivers/block/aoe/aoedev.c
View File

@ -13,7 +13,7 @@ static struct aoedev *devlist;
static spinlock_t devlist_lock;
struct aoedev *
aoedev_bymac(unsigned char *macaddr)
aoedev_by_aoeaddr(int maj, int min)
{
struct aoedev *d;
ulong flags;
@ -21,7 +21,7 @@ aoedev_bymac(unsigned char *macaddr)
spin_lock_irqsave(&devlist_lock, flags);
for (d=devlist; d; d=d->next)
if (!memcmp(d->addr, macaddr, 6))
if (d->aoemajor == maj && d->aoeminor == min)
break;
spin_unlock_irqrestore(&devlist_lock, flags);
@ -125,7 +125,6 @@ aoedev_set(ulong sysminor, unsigned char *addr, struct net_device *ifp, ulong bu
d->ifp = ifp;
if (d->sysminor != sysminor
|| memcmp(d->addr, addr, sizeof d->addr)
|| (d->flags & DEVFL_UP) == 0) {
aoedev_downdev(d); /* flushes outstanding frames */
memcpy(d->addr, addr, sizeof d->addr);
@ -147,7 +146,8 @@ aoedev_freedev(struct aoedev *d)
put_disk(d->gd);
}
kfree(d->frames);
mempool_destroy(d->bufpool);
if (d->bufpool)
mempool_destroy(d->bufpool);
kfree(d);
}

8
drivers/block/aoe/aoenet.c
View File

@ -69,7 +69,7 @@ set_aoe_iflist(const char __user *user_str, size_t size)
u64
mac_addr(char addr[6])
{
u64 n = 0;
__be64 n = 0;
char *p = (char *) &n;
memcpy(p + 2, addr, 6); /* (sizeof addr != 6) */
@ -108,7 +108,7 @@ static int
aoenet_rcv(struct sk_buff *skb, struct net_device *ifp, struct packet_type *pt)
{
struct aoe_hdr *h;
ulong n;
u32 n;
skb = skb_check(skb);
if (!skb)
@ -121,7 +121,7 @@ aoenet_rcv(struct sk_buff *skb, struct net_device *ifp, struct packet_type *pt)
skb_push(skb, ETH_HLEN); /* (1) */
h = (struct aoe_hdr *) skb->mac.raw;
n = __be32_to_cpu(*((u32 *) h->tag));
n = be32_to_cpu(h->tag);
if ((h->verfl & AOEFL_RSP) == 0 || (n & 1<<31))
goto exit;
@ -132,7 +132,7 @@ aoenet_rcv(struct sk_buff *skb, struct net_device *ifp, struct packet_type *pt)
if (net_ratelimit())
printk(KERN_ERR "aoe: aoenet_rcv: error packet from %d.%d; "
"ecode=%d '%s'\n",
__be16_to_cpu(*((u16 *) h->major)), h->minor,
be16_to_cpu(h->major), h->minor,
h->err, aoe_errlist[n]);
goto exit;
}