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

for 11 aoe bugfix patches.

Documentation/aoe/mkdevs.sh

@@ -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

Documentation/aoe/mkshelf.sh

@@ -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}

Documentation/aoe/todo.txt

@@ -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.

Documentation/aoe/udev-install.sh

@@ -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"

drivers/block/aoe/aoe.h

@@ -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);

drivers/block/aoe/aoeblk.c

@@ -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);