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Message-ID: <4A41F458.2050409@panasas.com>
Date: Wed, 24 Jun 2009 12:39:36 +0300
From: Boaz Harrosh <bharrosh@...asas.com>
To: Linus Torvalds <torvalds@...ux-foundation.org>,
Jeff Garzik <jeff@...zik.org>,
Linux Kernel <linux-kernel@...r.kernel.org>,
linux-fsdevel <linux-fsdevel@...r.kernel.org>,
open-osd mailing-list <osd-dev@...n-osd.org>
Subject: Re: [osd-dev] [GIT PULL] exofs/osd tree for 2.6.31
On 06/22/2009 11:50 AM, Boaz Harrosh wrote:
> Linus
>
> Please pull the following exofs/OSD changes from the git repository at:
>
> git://git.open-osd.org/linux-open-osd.git for-linus
>
> These are a few fixes/cleanups and mainly a new block-device driver
> from Jeff Garzik, that can export an OSD object to block-based users
> like filesystems.
>
> Boaz Harrosh (5):
> exofs: Fix bio leak in error handling path (sync read)
> exofs: Remove IBM copyrights
> exofs: Avoid using file_fsync()
> MAINTAINERS: Add osd maintained files (F:)
> osdblk: Adjust queue limits to lower device's limits
>
> Jeff Garzik (1):
> osdblk: a Linux block device for OSD objects
>
> MAINTAINERS | 5 +-
> drivers/block/Kconfig | 16 ++
> drivers/block/Makefile | 1 +
> drivers/block/osdblk.c | 670 ++++++++++++++++++++++++++++++++++++++++++++++++
> fs/exofs/common.h | 4 +-
> fs/exofs/dir.c | 4 +-
> fs/exofs/exofs.h | 7 +-
> fs/exofs/file.c | 21 +-
> fs/exofs/inode.c | 7 +-
> fs/exofs/namei.c | 4 +-
> fs/exofs/osd.c | 4 +-
> fs/exofs/super.c | 6 +-
> fs/exofs/symlink.c | 4 +-
> 13 files changed, 719 insertions(+), 34 deletions(-)
> create mode 100644 drivers/block/osdblk.c
>
> [These patches can be viewed on the web here:
> http://git.open-osd.org/gitweb.cgi?p=linux-open-osd.git;a=shortlog;h=refs/heads/for-linus
> ]
>
> Thanks
> Boaz
Hi Linus, Jeff
while testing osdblk I have found some bugs and squashed below patch into
the original osdblk driver.
Linus please see that you have bc47df0 it might take a few minutes to update
Boaz
---
Subject: [SQUASHME] osdblk: Assorted bug fixes
I have squashed the below fixes to the original osdblk driver.
It should run much better now
Signed-off-by: Boaz Harrosh <bharrosh@...asas.com>
---
diff --git a/drivers/block/osdblk.c b/drivers/block/osdblk.c
index b07e154..13c1aee 100644
--- a/drivers/block/osdblk.c
+++ b/drivers/block/osdblk.c
@@ -71,6 +71,19 @@
#define DRV_NAME "osdblk"
#define PFX DRV_NAME ": "
+/* #define _OSDBLK_DEBUG */
+#ifdef _OSDBLK_DEBUG
+#define OSDBLK_DEBUG(fmt, a...) \
+ printk(KERN_NOTICE "osdblk @%s:%d: " fmt, __func__, __LINE__, ##a)
+#else
+#define OSDBLK_DEBUG(fmt, a...) \
+ do { if (0) printk(fmt, ##a); } while (0)
+#endif
+
+MODULE_AUTHOR("Jeff Garzik <jeff@...zik.org>");
+MODULE_DESCRIPTION("block device inside an OSD object osdblk.ko");
+MODULE_LICENSE("GPL");
+
struct osdblk_device;
enum {
@@ -109,7 +122,7 @@ struct osdblk_device {
};
static struct class *class_osdblk; /* /sys/class/osdblk */
-static struct mutex ctl_mutex; /* Serialize open/close/setup/teardown */
+static DEFINE_MUTEX(ctl_mutex); /* Serialize open/close/setup/teardown */
static LIST_HEAD(osdblkdev_list);
static struct block_device_operations osdblk_bd_ops = {
@@ -223,8 +236,10 @@ static void osdblk_osd_complete(struct osd_request *or, void *private)
struct osd_sense_info osi;
int ret = osd_req_decode_sense(or, &osi);
- if (ret)
+ if (ret) {
ret = -EIO;
+ OSDBLK_DEBUG("osdblk_osd_complete with err=%d\n", ret);
+ }
/* complete OSD request */
osd_end_request(or);
@@ -250,13 +265,15 @@ static struct bio *bio_chain_clone(struct bio *old_chain, gfp_t gfpmask)
struct bio *tmp, *new_chain = NULL, *tail = NULL;
while (old_chain) {
- tmp = bio_kmalloc(gfpmask, old_chain->bi_vcnt);
+ tmp = bio_kmalloc(gfpmask, old_chain->bi_max_vecs);
if (!tmp)
goto err_out;
__bio_clone(tmp, old_chain);
+ tmp->bi_bdev = NULL;
gfpmask &= ~__GFP_WAIT;
tmp->bi_next = NULL;
+
if (!new_chain)
new_chain = tail = tmp;
else {
@@ -270,6 +287,7 @@ static struct bio *bio_chain_clone(struct bio *old_chain, gfp_t gfpmask)
return new_chain;
err_out:
+ OSDBLK_DEBUG("bio_chain_clone with err\n");
bio_chain_put(new_chain);
return NULL;
}
@@ -277,13 +295,14 @@ err_out:
static void osdblk_rq_fn(struct request_queue *q)
{
struct osdblk_device *osdev = q->queuedata;
- struct request *rq;
- struct osdblk_request *orq;
- struct osd_request *or;
- struct bio *bio;
- int do_write, do_flush;
while (1) {
+ struct request *rq;
+ struct osdblk_request *orq;
+ struct osd_request *or;
+ struct bio *bio;
+ bool do_write, do_flush;
+
/* peek at request from block layer */
rq = blk_fetch_request(q);
if (!rq)
@@ -317,6 +336,7 @@ static void osdblk_rq_fn(struct request_queue *q)
or = osd_start_request(osdev->osd, GFP_ATOMIC);
if (!or) {
bio_chain_put(bio);
+ OSDBLK_DEBUG("osd_start_request with err\n");
break;
}
@@ -336,12 +356,19 @@ static void osdblk_rq_fn(struct request_queue *q)
osd_req_read(or, &osdev->obj, blk_rq_pos(rq) * 512ULL,
bio, blk_rq_bytes(rq));
+ OSDBLK_DEBUG("%s 0x%x bytes at 0x%llx\n",
+ do_flush ? "flush" : do_write ?
+ "write" : "read", blk_rq_bytes(rq),
+ blk_rq_pos(rq) * 512ULL);
+
/* begin OSD command execution */
if (osd_async_op(or, osdblk_osd_complete, orq,
osdev->obj_cred)) {
osd_end_request(or);
blk_requeue_request(q, rq);
bio_chain_put(bio);
+ OSDBLK_DEBUG("osd_execute_request_async with err\n");
+ break;
}
/* remove the special 'flush' marker, now that the command
@@ -390,7 +417,7 @@ static int osdblk_init_disk(struct osdblk_device *osdev)
if (!disk)
return -ENOMEM;
- sprintf(disk->disk_name, DRV_NAME "/%d", osdev->id);
+ sprintf(disk->disk_name, DRV_NAME "%d", osdev->id);
disk->major = osdev->major;
disk->first_minor = 0;
disk->fops = &osdblk_bd_ops;
@@ -428,9 +455,12 @@ static int osdblk_init_disk(struct osdblk_device *osdev)
osdev->q = q;
/* finally, announce the disk to the world */
- set_capacity(disk, obj_size);
+ set_capacity(disk, obj_size / 512ULL);
add_disk(disk);
+ printk(KERN_INFO "%s: Added of size 0x%llx\n",
+ disk->disk_name, (unsigned long long)obj_size);
+
return 0;
}
@@ -544,7 +574,7 @@ static ssize_t class_osdblk_add(struct class *c, const char *buf, size_t count)
if (rc)
goto err_out_blkdev;
- return 0;
+ return count;
err_out_blkdev:
unregister_blkdev(osdev->major, osdev->name);
@@ -557,6 +587,7 @@ err_out_slot:
kfree(osdev);
err_out_mod:
+ OSDBLK_DEBUG("Error adding device %s\n", buf);
module_put(THIS_MODULE);
return rc;
}
@@ -604,7 +635,7 @@ static ssize_t class_osdblk_remove(struct class *c, const char *buf,
/* release module ref */
module_put(THIS_MODULE);
- return 0;
+ return count;
}
static struct class_attribute class_osdblk_attrs[] = {
diff --git a/drivers/scsi/osd/osd_initiator.c b/drivers/scsi/osd/osd_initiator.c
index 7a117c1..da0e35f 100644
--- a/drivers/scsi/osd/osd_initiator.c
+++ b/drivers/scsi/osd/osd_initiator.c
@@ -441,7 +441,7 @@ void osd_end_request(struct osd_request *or)
{
struct request *rq = or->request;
/* IMPORTANT: make sure this agrees with osd_execute_request_async */
- bool is_async = (or->request->end_io_data == or);
+ bool is_async = (rq->end_io_data == or);
_osd_free_seg(or, &or->set_attr);
_osd_free_seg(or, &or->enc_get_attr);
--
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