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-rw-r--r--drivers/block/Kconfig15
-rw-r--r--drivers/block/cciss.h2
-rw-r--r--drivers/block/cciss_scsi.c2
-rw-r--r--drivers/block/drbd/drbd_actlog.c2
-rw-r--r--drivers/block/drbd/drbd_bitmap.c37
-rw-r--r--drivers/block/drbd/drbd_nl.c4
-rw-r--r--drivers/block/drbd/drbd_receiver.c6
-rw-r--r--drivers/block/drbd/drbd_worker.c7
-rw-r--r--drivers/block/hd.c2
-rw-r--r--drivers/block/loop.c297
-rw-r--r--drivers/block/pktcdvd.c2
-rw-r--r--drivers/block/rbd.c46
-rw-r--r--drivers/block/swim3.c1
-rw-r--r--drivers/block/xen-blkback/xenbus.c2
-rw-r--r--drivers/block/xsysace.c98
15 files changed, 321 insertions, 202 deletions
diff --git a/drivers/block/Kconfig b/drivers/block/Kconfig
index a89ebf1b28aa..6f07ec1c2f58 100644
--- a/drivers/block/Kconfig
+++ b/drivers/block/Kconfig
@@ -256,6 +256,21 @@ config BLK_DEV_LOOP
Most users will answer N here.
+config BLK_DEV_LOOP_MIN_COUNT
+ int "Number of loop devices to pre-create at init time"
+ depends on BLK_DEV_LOOP
+ default 8
+ help
+ Static number of loop devices to be unconditionally pre-created
+ at init time.
+
+ This default value can be overwritten on the kernel command
+ line or with module-parameter loop.max_loop.
+
+ The historic default is 8. If a late 2011 version of losetup(8)
+ is used, it can be set to 0, since needed loop devices can be
+ dynamically allocated with the /dev/loop-control interface.
+
config BLK_DEV_CRYPTOLOOP
tristate "Cryptoloop Support"
select CRYPTO
diff --git a/drivers/block/cciss.h b/drivers/block/cciss.h
index 16b4d58d84dd..c049548e68b7 100644
--- a/drivers/block/cciss.h
+++ b/drivers/block/cciss.h
@@ -223,7 +223,7 @@ static void SA5_submit_command( ctlr_info_t *h, CommandList_struct *c)
h->ctlr, c->busaddr);
#endif /* CCISS_DEBUG */
writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
- readl(h->vaddr + SA5_REQUEST_PORT_OFFSET);
+ readl(h->vaddr + SA5_SCRATCHPAD_OFFSET);
h->commands_outstanding++;
if ( h->commands_outstanding > h->max_outstanding)
h->max_outstanding = h->commands_outstanding;
diff --git a/drivers/block/cciss_scsi.c b/drivers/block/cciss_scsi.c
index 696100241a6f..951a4e33b92b 100644
--- a/drivers/block/cciss_scsi.c
+++ b/drivers/block/cciss_scsi.c
@@ -33,7 +33,7 @@
#include <linux/slab.h>
#include <linux/string.h>
-#include <asm/atomic.h>
+#include <linux/atomic.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
diff --git a/drivers/block/drbd/drbd_actlog.c b/drivers/block/drbd/drbd_actlog.c
index 09ef9a878ef0..cf0e63dd97da 100644
--- a/drivers/block/drbd/drbd_actlog.c
+++ b/drivers/block/drbd/drbd_actlog.c
@@ -79,7 +79,7 @@ static int _drbd_md_sync_page_io(struct drbd_conf *mdev,
md_io.error = 0;
if ((rw & WRITE) && !test_bit(MD_NO_FUA, &mdev->flags))
- rw |= REQ_FUA;
+ rw |= REQ_FUA | REQ_FLUSH;
rw |= REQ_SYNC;
bio = bio_alloc(GFP_NOIO, 1);
diff --git a/drivers/block/drbd/drbd_bitmap.c b/drivers/block/drbd/drbd_bitmap.c
index f440a02dfdb1..7b976296b564 100644
--- a/drivers/block/drbd/drbd_bitmap.c
+++ b/drivers/block/drbd/drbd_bitmap.c
@@ -112,9 +112,6 @@ struct drbd_bitmap {
struct task_struct *bm_task;
};
-static int __bm_change_bits_to(struct drbd_conf *mdev, const unsigned long s,
- unsigned long e, int val, const enum km_type km);
-
#define bm_print_lock_info(m) __bm_print_lock_info(m, __func__)
static void __bm_print_lock_info(struct drbd_conf *mdev, const char *func)
{
@@ -994,6 +991,9 @@ static void bm_page_io_async(struct bm_aio_ctx *ctx, int page_nr, int rw) __must
bio_endio(bio, -EIO);
} else {
submit_bio(rw, bio);
+ /* this should not count as user activity and cause the
+ * resync to throttle -- see drbd_rs_should_slow_down(). */
+ atomic_add(len >> 9, &mdev->rs_sect_ev);
}
}
@@ -1256,7 +1256,7 @@ unsigned long _drbd_bm_find_next_zero(struct drbd_conf *mdev, unsigned long bm_f
* expected to be called for only a few bits (e - s about BITS_PER_LONG).
* Must hold bitmap lock already. */
static int __bm_change_bits_to(struct drbd_conf *mdev, const unsigned long s,
- unsigned long e, int val, const enum km_type km)
+ unsigned long e, int val)
{
struct drbd_bitmap *b = mdev->bitmap;
unsigned long *p_addr = NULL;
@@ -1274,14 +1274,14 @@ static int __bm_change_bits_to(struct drbd_conf *mdev, const unsigned long s,
unsigned int page_nr = bm_bit_to_page_idx(b, bitnr);
if (page_nr != last_page_nr) {
if (p_addr)
- __bm_unmap(p_addr, km);
+ __bm_unmap(p_addr, KM_IRQ1);
if (c < 0)
bm_set_page_lazy_writeout(b->bm_pages[last_page_nr]);
else if (c > 0)
bm_set_page_need_writeout(b->bm_pages[last_page_nr]);
changed_total += c;
c = 0;
- p_addr = __bm_map_pidx(b, page_nr, km);
+ p_addr = __bm_map_pidx(b, page_nr, KM_IRQ1);
last_page_nr = page_nr;
}
if (val)
@@ -1290,7 +1290,7 @@ static int __bm_change_bits_to(struct drbd_conf *mdev, const unsigned long s,
c -= (0 != __test_and_clear_bit_le(bitnr & BITS_PER_PAGE_MASK, p_addr));
}
if (p_addr)
- __bm_unmap(p_addr, km);
+ __bm_unmap(p_addr, KM_IRQ1);
if (c < 0)
bm_set_page_lazy_writeout(b->bm_pages[last_page_nr]);
else if (c > 0)
@@ -1318,7 +1318,7 @@ static int bm_change_bits_to(struct drbd_conf *mdev, const unsigned long s,
if ((val ? BM_DONT_SET : BM_DONT_CLEAR) & b->bm_flags)
bm_print_lock_info(mdev);
- c = __bm_change_bits_to(mdev, s, e, val, KM_IRQ1);
+ c = __bm_change_bits_to(mdev, s, e, val);
spin_unlock_irqrestore(&b->bm_lock, flags);
return c;
@@ -1343,16 +1343,17 @@ static inline void bm_set_full_words_within_one_page(struct drbd_bitmap *b,
{
int i;
int bits;
- unsigned long *paddr = kmap_atomic(b->bm_pages[page_nr], KM_USER0);
+ unsigned long *paddr = kmap_atomic(b->bm_pages[page_nr], KM_IRQ1);
for (i = first_word; i < last_word; i++) {
bits = hweight_long(paddr[i]);
paddr[i] = ~0UL;
b->bm_set += BITS_PER_LONG - bits;
}
- kunmap_atomic(paddr, KM_USER0);
+ kunmap_atomic(paddr, KM_IRQ1);
}
-/* Same thing as drbd_bm_set_bits, but without taking the spin_lock_irqsave.
+/* Same thing as drbd_bm_set_bits,
+ * but more efficient for a large bit range.
* You must first drbd_bm_lock().
* Can be called to set the whole bitmap in one go.
* Sets bits from s to e _inclusive_. */
@@ -1366,6 +1367,7 @@ void _drbd_bm_set_bits(struct drbd_conf *mdev, const unsigned long s, const unsi
* Do not use memset, because we must account for changes,
* so we need to loop over the words with hweight() anyways.
*/
+ struct drbd_bitmap *b = mdev->bitmap;
unsigned long sl = ALIGN(s,BITS_PER_LONG);
unsigned long el = (e+1) & ~((unsigned long)BITS_PER_LONG-1);
int first_page;
@@ -1376,15 +1378,19 @@ void _drbd_bm_set_bits(struct drbd_conf *mdev, const unsigned long s, const unsi
if (e - s <= 3*BITS_PER_LONG) {
/* don't bother; el and sl may even be wrong. */
- __bm_change_bits_to(mdev, s, e, 1, KM_USER0);
+ spin_lock_irq(&b->bm_lock);
+ __bm_change_bits_to(mdev, s, e, 1);
+ spin_unlock_irq(&b->bm_lock);
return;
}
/* difference is large enough that we can trust sl and el */
+ spin_lock_irq(&b->bm_lock);
+
/* bits filling the current long */
if (sl)
- __bm_change_bits_to(mdev, s, sl-1, 1, KM_USER0);
+ __bm_change_bits_to(mdev, s, sl-1, 1);
first_page = sl >> (3 + PAGE_SHIFT);
last_page = el >> (3 + PAGE_SHIFT);
@@ -1397,8 +1403,10 @@ void _drbd_bm_set_bits(struct drbd_conf *mdev, const unsigned long s, const unsi
/* first and full pages, unless first page == last page */
for (page_nr = first_page; page_nr < last_page; page_nr++) {
bm_set_full_words_within_one_page(mdev->bitmap, page_nr, first_word, last_word);
+ spin_unlock_irq(&b->bm_lock);
cond_resched();
first_word = 0;
+ spin_lock_irq(&b->bm_lock);
}
/* last page (respectively only page, for first page == last page) */
@@ -1411,7 +1419,8 @@ void _drbd_bm_set_bits(struct drbd_conf *mdev, const unsigned long s, const unsi
* it would trigger an assert in __bm_change_bits_to()
*/
if (el <= e)
- __bm_change_bits_to(mdev, el, e, 1, KM_USER0);
+ __bm_change_bits_to(mdev, el, e, 1);
+ spin_unlock_irq(&b->bm_lock);
}
/* returns bit state
diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c
index 515bcd948a43..0feab261e295 100644
--- a/drivers/block/drbd/drbd_nl.c
+++ b/drivers/block/drbd/drbd_nl.c
@@ -1829,10 +1829,10 @@ static int drbd_nl_syncer_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *n
/* silently ignore cpu mask on UP kernel */
if (nr_cpu_ids > 1 && sc.cpu_mask[0] != 0) {
- err = __bitmap_parse(sc.cpu_mask, 32, 0,
+ err = bitmap_parse(sc.cpu_mask, 32,
cpumask_bits(new_cpu_mask), nr_cpu_ids);
if (err) {
- dev_warn(DEV, "__bitmap_parse() failed with %d\n", err);
+ dev_warn(DEV, "bitmap_parse() failed with %d\n", err);
retcode = ERR_CPU_MASK_PARSE;
goto fail;
}
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index 25d32c5aa50a..43beaca53179 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -4602,6 +4602,11 @@ int drbd_asender(struct drbd_thread *thi)
dev_err(DEV, "meta connection shut down by peer.\n");
goto reconnect;
} else if (rv == -EAGAIN) {
+ /* If the data socket received something meanwhile,
+ * that is good enough: peer is still alive. */
+ if (time_after(mdev->last_received,
+ jiffies - mdev->meta.socket->sk->sk_rcvtimeo))
+ continue;
if (ping_timeout_active) {
dev_err(DEV, "PingAck did not arrive in time.\n");
goto reconnect;
@@ -4637,6 +4642,7 @@ int drbd_asender(struct drbd_thread *thi)
goto reconnect;
}
if (received == expect) {
+ mdev->last_received = jiffies;
D_ASSERT(cmd != NULL);
if (!cmd->process(mdev, h))
goto reconnect;
diff --git a/drivers/block/drbd/drbd_worker.c b/drivers/block/drbd/drbd_worker.c
index 4d76b06b6b20..4d3e6f6213ba 100644
--- a/drivers/block/drbd/drbd_worker.c
+++ b/drivers/block/drbd/drbd_worker.c
@@ -536,12 +536,7 @@ static int w_make_resync_request(struct drbd_conf *mdev,
return 1;
}
- /* starting with drbd 8.3.8, we can handle multi-bio EEs,
- * if it should be necessary */
- max_bio_size =
- mdev->agreed_pro_version < 94 ? queue_max_hw_sectors(mdev->rq_queue) << 9 :
- mdev->agreed_pro_version < 95 ? DRBD_MAX_SIZE_H80_PACKET : DRBD_MAX_BIO_SIZE;
-
+ max_bio_size = queue_max_hw_sectors(mdev->rq_queue) << 9;
number = drbd_rs_number_requests(mdev);
if (number == 0)
goto requeue;
diff --git a/drivers/block/hd.c b/drivers/block/hd.c
index 007c630904c1..b52c9ca146fc 100644
--- a/drivers/block/hd.c
+++ b/drivers/block/hd.c
@@ -155,7 +155,7 @@ else \
#if (HD_DELAY > 0)
-#include <asm/i8253.h>
+#include <linux/i8253.h>
unsigned long last_req;
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 76c8da78212b..4720c7ade0ae 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -75,11 +75,11 @@
#include <linux/kthread.h>
#include <linux/splice.h>
#include <linux/sysfs.h>
-
+#include <linux/miscdevice.h>
#include <asm/uaccess.h>
-static LIST_HEAD(loop_devices);
-static DEFINE_MUTEX(loop_devices_mutex);
+static DEFINE_IDR(loop_index_idr);
+static DEFINE_MUTEX(loop_index_mutex);
static int max_part;
static int part_shift;
@@ -722,17 +722,10 @@ static inline int is_loop_device(struct file *file)
static ssize_t loop_attr_show(struct device *dev, char *page,
ssize_t (*callback)(struct loop_device *, char *))
{
- struct loop_device *l, *lo = NULL;
-
- mutex_lock(&loop_devices_mutex);
- list_for_each_entry(l, &loop_devices, lo_list)
- if (disk_to_dev(l->lo_disk) == dev) {
- lo = l;
- break;
- }
- mutex_unlock(&loop_devices_mutex);
+ struct gendisk *disk = dev_to_disk(dev);
+ struct loop_device *lo = disk->private_data;
- return lo ? callback(lo, page) : -EIO;
+ return callback(lo, page);
}
#define LOOP_ATTR_RO(_name) \
@@ -750,10 +743,10 @@ static ssize_t loop_attr_backing_file_show(struct loop_device *lo, char *buf)
ssize_t ret;
char *p = NULL;
- mutex_lock(&lo->lo_ctl_mutex);
+ spin_lock_irq(&lo->lo_lock);
if (lo->lo_backing_file)
p = d_path(&lo->lo_backing_file->f_path, buf, PAGE_SIZE - 1);
- mutex_unlock(&lo->lo_ctl_mutex);
+ spin_unlock_irq(&lo->lo_lock);
if (IS_ERR_OR_NULL(p))
ret = PTR_ERR(p);
@@ -1007,7 +1000,9 @@ static int loop_clr_fd(struct loop_device *lo, struct block_device *bdev)
kthread_stop(lo->lo_thread);
+ spin_lock_irq(&lo->lo_lock);
lo->lo_backing_file = NULL;
+ spin_unlock_irq(&lo->lo_lock);
loop_release_xfer(lo);
lo->transfer = NULL;
@@ -1485,13 +1480,22 @@ static int lo_compat_ioctl(struct block_device *bdev, fmode_t mode,
static int lo_open(struct block_device *bdev, fmode_t mode)
{
- struct loop_device *lo = bdev->bd_disk->private_data;
+ struct loop_device *lo;
+ int err = 0;
+
+ mutex_lock(&loop_index_mutex);
+ lo = bdev->bd_disk->private_data;
+ if (!lo) {
+ err = -ENXIO;
+ goto out;
+ }
mutex_lock(&lo->lo_ctl_mutex);
lo->lo_refcnt++;
mutex_unlock(&lo->lo_ctl_mutex);
-
- return 0;
+out:
+ mutex_unlock(&loop_index_mutex);
+ return err;
}
static int lo_release(struct gendisk *disk, fmode_t mode)
@@ -1557,40 +1561,71 @@ int loop_register_transfer(struct loop_func_table *funcs)
return 0;
}
+static int unregister_transfer_cb(int id, void *ptr, void *data)
+{
+ struct loop_device *lo = ptr;
+ struct loop_func_table *xfer = data;
+
+ mutex_lock(&lo->lo_ctl_mutex);
+ if (lo->lo_encryption == xfer)
+ loop_release_xfer(lo);
+ mutex_unlock(&lo->lo_ctl_mutex);
+ return 0;
+}
+
int loop_unregister_transfer(int number)
{
unsigned int n = number;
- struct loop_device *lo;
struct loop_func_table *xfer;
if (n == 0 || n >= MAX_LO_CRYPT || (xfer = xfer_funcs[n]) == NULL)
return -EINVAL;
xfer_funcs[n] = NULL;
-
- list_for_each_entry(lo, &loop_devices, lo_list) {
- mutex_lock(&lo->lo_ctl_mutex);
-
- if (lo->lo_encryption == xfer)
- loop_release_xfer(lo);
-
- mutex_unlock(&lo->lo_ctl_mutex);
- }
-
+ idr_for_each(&loop_index_idr, &unregister_transfer_cb, xfer);
return 0;
}
EXPORT_SYMBOL(loop_register_transfer);
EXPORT_SYMBOL(loop_unregister_transfer);
-static struct loop_device *loop_alloc(int i)
+static int loop_add(struct loop_device **l, int i)
{
struct loop_device *lo;
struct gendisk *disk;
+ int err;
lo = kzalloc(sizeof(*lo), GFP_KERNEL);
- if (!lo)
+ if (!lo) {
+ err = -ENOMEM;
goto out;
+ }
+
+ err = idr_pre_get(&loop_index_idr, GFP_KERNEL);
+ if (err < 0)
+ goto out_free_dev;
+
+ if (i >= 0) {
+ int m;
+
+ /* create specific i in the index */
+ err = idr_get_new_above(&loop_index_idr, lo, i, &m);
+ if (err >= 0 && i != m) {
+ idr_remove(&loop_index_idr, m);
+ err = -EEXIST;
+ }
+ } else if (i == -1) {
+ int m;
+
+ /* get next free nr */
+ err = idr_get_new(&loop_index_idr, lo, &m);
+ if (err >= 0)
+ i = m;
+ } else {
+ err = -EINVAL;
+ }
+ if (err < 0)
+ goto out_free_dev;
lo->lo_queue = blk_alloc_queue(GFP_KERNEL);
if (!lo->lo_queue)
@@ -1611,81 +1646,158 @@ static struct loop_device *loop_alloc(int i)
disk->private_data = lo;
disk->queue = lo->lo_queue;
sprintf(disk->disk_name, "loop%d", i);
- return lo;
+ add_disk(disk);
+ *l = lo;
+ return lo->lo_number;
out_free_queue:
blk_cleanup_queue(lo->lo_queue);
out_free_dev:
kfree(lo);
out:
- return NULL;
+ return err;
}
-static void loop_free(struct loop_device *lo)
+static void loop_remove(struct loop_device *lo)
{
+ del_gendisk(lo->lo_disk);
blk_cleanup_queue(lo->lo_queue);
put_disk(lo->lo_disk);
- list_del(&lo->lo_list);
kfree(lo);
}
-static struct loop_device *loop_init_one(int i)
+static int find_free_cb(int id, void *ptr, void *data)
+{
+ struct loop_device *lo = ptr;
+ struct loop_device **l = data;
+
+ if (lo->lo_state == Lo_unbound) {
+ *l = lo;
+ return 1;
+ }
+ return 0;
+}
+
+static int loop_lookup(struct loop_device **l, int i)
{
struct loop_device *lo;
+ int ret = -ENODEV;
- list_for_each_entry(lo, &loop_devices, lo_list) {
- if (lo->lo_number == i)
- return lo;
+ if (i < 0) {
+ int err;
+
+ err = idr_for_each(&loop_index_idr, &find_free_cb, &lo);
+ if (err == 1) {
+ *l = lo;
+ ret = lo->lo_number;
+ }
+ goto out;
}
- lo = loop_alloc(i);
+ /* lookup and return a specific i */
+ lo = idr_find(&loop_index_idr, i);
if (lo) {
- add_disk(lo->lo_disk);
- list_add_tail(&lo->lo_list, &loop_devices);
+ *l = lo;
+ ret = lo->lo_number;
}
- return lo;
-}
-
-static void loop_del_one(struct loop_device *lo)
-{
- del_gendisk(lo->lo_disk);
- loop_free(lo);
+out:
+ return ret;
}
static struct kobject *loop_probe(dev_t dev, int *part, void *data)
{
struct loop_device *lo;
struct kobject *kobj;
+ int err;
- mutex_lock(&loop_devices_mutex);
- lo = loop_init_one(MINOR(dev) >> part_shift);
- kobj = lo ? get_disk(lo->lo_disk) : ERR_PTR(-ENOMEM);
- mutex_unlock(&loop_devices_mutex);
+ mutex_lock(&loop_index_mutex);
+ err = loop_lookup(&lo, MINOR(dev) >> part_shift);
+ if (err < 0)
+ err = loop_add(&lo, MINOR(dev) >> part_shift);
+ if (err < 0)
+ kobj = ERR_PTR(err);
+ else
+ kobj = get_disk(lo->lo_disk);
+ mutex_unlock(&loop_index_mutex);
*part = 0;
return kobj;
}
+static long loop_control_ioctl(struct file *file, unsigned int cmd,
+ unsigned long parm)
+{
+ struct loop_device *lo;
+ int ret = -ENOSYS;
+
+ mutex_lock(&loop_index_mutex);
+ switch (cmd) {
+ case LOOP_CTL_ADD:
+ ret = loop_lookup(&lo, parm);
+ if (ret >= 0) {
+ ret = -EEXIST;
+ break;
+ }
+ ret = loop_add(&lo, parm);
+ break;
+ case LOOP_CTL_REMOVE:
+ ret = loop_lookup(&lo, parm);
+ if (ret < 0)
+ break;
+ mutex_lock(&lo->lo_ctl_mutex);
+ if (lo->lo_state != Lo_unbound) {
+ ret = -EBUSY;
+ mutex_unlock(&lo->lo_ctl_mutex);
+ break;
+ }
+ if (lo->lo_refcnt > 0) {
+ ret = -EBUSY;
+ mutex_unlock(&lo->lo_ctl_mutex);
+ break;
+ }
+ lo->lo_disk->private_data = NULL;
+ mutex_unlock(&lo->lo_ctl_mutex);
+ idr_remove(&loop_index_idr, lo->lo_number);
+ loop_remove(lo);
+ break;
+ case LOOP_CTL_GET_FREE:
+ ret = loop_lookup(&lo, -1);
+ if (ret >= 0)
+ break;
+ ret = loop_add(&lo, -1);
+ }
+ mutex_unlock(&loop_index_mutex);
+
+ return ret;
+}
+
+static const struct file_operations loop_ctl_fops = {
+ .open = nonseekable_open,
+ .unlocked_ioctl = loop_control_ioctl,
+ .compat_ioctl = loop_control_ioctl,
+ .owner = THIS_MODULE,
+ .llseek = noop_llseek,
+};
+
+static struct miscdevice loop_misc = {
+ .minor = LOOP_CTRL_MINOR,
+ .name = "loop-control",
+ .fops = &loop_ctl_fops,
+};
+
+MODULE_ALIAS_MISCDEV(LOOP_CTRL_MINOR);
+MODULE_ALIAS("devname:loop-control");
+
static int __init loop_init(void)
{
int i, nr;
unsigned long range;
- struct loop_device *lo, *next;
+ struct loop_device *lo;
+ int err;
- /*
- * loop module now has a feature to instantiate underlying device
- * structure on-demand, provided that there is an access dev node.
- * However, this will not work well with user space tool that doesn't
- * know about such "feature". In order to not break any existing
- * tool, we do the following:
- *
- * (1) if max_loop is specified, create that many upfront, and this
- * also becomes a hard limit.
- * (2) if max_loop is not specified, create 8 loop device on module
- * load, user can further extend loop device by create dev node
- * themselves and have kernel automatically instantiate actual
- * device on-demand.
- */
+ err = misc_register(&loop_misc);
+ if (err < 0)
+ return err;
part_shift = 0;
if (max_part > 0) {
@@ -1708,57 +1820,60 @@ static int __init loop_init(void)
if (max_loop > 1UL << (MINORBITS - part_shift))
return -EINVAL;
+ /*
+ * If max_loop is specified, create that many devices upfront.
+ * This also becomes a hard limit. If max_loop is not specified,
+ * create CONFIG_BLK_DEV_LOOP_MIN_COUNT loop devices at module
+ * init time. Loop devices can be requested on-demand with the
+ * /dev/loop-control interface, or be instantiated by accessing
+ * a 'dead' device node.
+ */
if (max_loop) {
nr = max_loop;
range = max_loop << part_shift;
} else {
- nr = 8;
+ nr = CONFIG_BLK_DEV_LOOP_MIN_COUNT;
range = 1UL << MINORBITS;
}
if (register_blkdev(LOOP_MAJOR, "loop"))
return -EIO;
- for (i = 0; i < nr; i++) {
- lo = loop_alloc(i);
- if (!lo)
- goto Enomem;
- list_add_tail(&lo->lo_list, &loop_devices);
- }
-
- /* point of no return */
-
- list_for_each_entry(lo, &loop_devices, lo_list)
- add_disk(lo->lo_disk);
-
blk_register_region(MKDEV(LOOP_MAJOR, 0), range,
THIS_MODULE, loop_probe, NULL, NULL);
+ /* pre-create number of devices given by config or max_loop */
+ mutex_lock(&loop_index_mutex);
+ for (i = 0; i < nr; i++)
+ loop_add(&lo, i);
+ mutex_unlock(&loop_index_mutex);
+
printk(KERN_INFO "loop: module loaded\n");
return 0;
+}
-Enomem:
- printk(KERN_INFO "loop: out of memory\n");
-
- list_for_each_entry_safe(lo, next, &loop_devices, lo_list)
- loop_free(lo);
+static int loop_exit_cb(int id, void *ptr, void *data)
+{
+ struct loop_device *lo = ptr;
- unregister_blkdev(LOOP_MAJOR, "loop");
- return -ENOMEM;
+ loop_remove(lo);
+ return 0;
}
static void __exit loop_exit(void)
{
unsigned long range;
- struct loop_device *lo, *next;
range = max_loop ? max_loop << part_shift : 1UL << MINORBITS;
- list_for_each_entry_safe(lo, next, &loop_devices, lo_list)
- loop_del_one(lo);
+ idr_for_each(&loop_index_idr, &loop_exit_cb, NULL);
+ idr_remove_all(&loop_index_idr);
+ idr_destroy(&loop_index_idr);
blk_unregister_region(MKDEV(LOOP_MAJOR, 0), range);
unregister_blkdev(LOOP_MAJOR, "loop");
+
+ misc_deregister(&loop_misc);
}
module_init(loop_init);
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index 07a382eaf0a8..e133f094ab08 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -1206,7 +1206,7 @@ static int pkt_start_recovery(struct packet_data *pkt)
if (!sb)
return 0;
- if (!sb->s_op || !sb->s_op->relocate_blocks)
+ if (!sb->s_op->relocate_blocks)
goto out;
old_block = pkt->sector / (CD_FRAMESIZE >> 9);
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 1278098624e6..15f65b5f3fc7 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -630,6 +630,14 @@ static int rbd_get_num_segments(struct rbd_image_header *header,
}
/*
+ * returns the size of an object in the image
+ */
+static u64 rbd_obj_bytes(struct rbd_image_header *header)
+{
+ return 1 << header->obj_order;
+}
+
+/*
* bio helpers
*/
@@ -1253,6 +1261,35 @@ fail:
return ret;
}
+/*
+ * Request sync osd unwatch
+ */
+static int rbd_req_sync_unwatch(struct rbd_device *dev,
+ const char *obj)
+{
+ struct ceph_osd_req_op *ops;
+
+ int ret = rbd_create_rw_ops(&ops, 1, CEPH_OSD_OP_WATCH, 0);
+ if (ret < 0)
+ return ret;
+
+ ops[0].watch.ver = 0;
+ ops[0].watch.cookie = cpu_to_le64(dev->watch_event->cookie);
+ ops[0].watch.flag = 0;
+
+ ret = rbd_req_sync_op(dev, NULL,
+ CEPH_NOSNAP,
+ 0,
+ CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK,
+ ops,
+ 1, obj, 0, 0, NULL, NULL, NULL);
+
+ rbd_destroy_ops(ops);
+ ceph_osdc_cancel_event(dev->watch_event);
+ dev->watch_event = NULL;
+ return ret;
+}
+
struct rbd_notify_info {
struct rbd_device *dev;
};
@@ -1736,6 +1773,13 @@ static int rbd_init_disk(struct rbd_device *rbd_dev)
q = blk_init_queue(rbd_rq_fn, &rbd_dev->lock);
if (!q)
goto out_disk;
+
+ /* set io sizes to object size */
+ blk_queue_max_hw_sectors(q, rbd_obj_bytes(&rbd_dev->header) / 512ULL);
+ blk_queue_max_segment_size(q, rbd_obj_bytes(&rbd_dev->header));
+ blk_queue_io_min(q, rbd_obj_bytes(&rbd_dev->header));
+ blk_queue_io_opt(q, rbd_obj_bytes(&rbd_dev->header));
+
blk_queue_merge_bvec(q, rbd_merge_bvec);
disk->queue = q;
@@ -2290,7 +2334,7 @@ static void rbd_dev_release(struct device *dev)
ceph_osdc_unregister_linger_request(&rbd_dev->client->osdc,
rbd_dev->watch_request);
if (rbd_dev->watch_event)
- ceph_osdc_cancel_event(rbd_dev->watch_event);
+ rbd_req_sync_unwatch(rbd_dev, rbd_dev->obj_md_name);
rbd_put_client(rbd_dev);
diff --git a/drivers/block/swim3.c b/drivers/block/swim3.c
index 773bfa792777..ae3e167e17ad 100644
--- a/drivers/block/swim3.c
+++ b/drivers/block/swim3.c
@@ -1184,6 +1184,7 @@ static struct of_device_id swim3_match[] =
{
.compatible = "swim3"
},
+ { /* end of list */ }
};
static struct macio_driver swim3_driver =
diff --git a/drivers/block/xen-blkback/xenbus.c b/drivers/block/xen-blkback/xenbus.c
index a96cb5f893a8..5fd2010f7d2b 100644
--- a/drivers/block/xen-blkback/xenbus.c
+++ b/drivers/block/xen-blkback/xenbus.c
@@ -684,7 +684,7 @@ again:
err = xenbus_switch_state(dev, XenbusStateConnected);
if (err)
- xenbus_dev_fatal(dev, err, "switching to Connected state",
+ xenbus_dev_fatal(dev, err, "%s: switching to Connected state",
dev->nodename);
return;
diff --git a/drivers/block/xsysace.c b/drivers/block/xsysace.c
index 6c7fd7db6dff..fb1975d82a73 100644
--- a/drivers/block/xsysace.c
+++ b/drivers/block/xsysace.c
@@ -1155,12 +1155,19 @@ static int __devinit ace_probe(struct platform_device *dev)
{
resource_size_t physaddr = 0;
int bus_width = ACE_BUS_WIDTH_16; /* FIXME: should not be hard coded */
- int id = dev->id;
+ u32 id = dev->id;
int irq = NO_IRQ;
int i;
dev_dbg(&dev->dev, "ace_probe(%p)\n", dev);
+ /* device id and bus width */
+ of_property_read_u32(dev->dev.of_node, "port-number", &id);
+ if (id < 0)
+ id = 0;
+ if (of_find_property(dev->dev.of_node, "8-bit", NULL))
+ bus_width = ACE_BUS_WIDTH_8;
+
for (i = 0; i < dev->num_resources; i++) {
if (dev->resource[i].flags & IORESOURCE_MEM)
physaddr = dev->resource[i].start;
@@ -1181,57 +1188,7 @@ static int __devexit ace_remove(struct platform_device *dev)
return 0;
}
-static struct platform_driver ace_platform_driver = {
- .probe = ace_probe,
- .remove = __devexit_p(ace_remove),
- .driver = {
- .owner = THIS_MODULE,
- .name = "xsysace",
- },
-};
-
-/* ---------------------------------------------------------------------
- * OF_Platform Bus Support
- */
-
#if defined(CONFIG_OF)
-static int __devinit ace_of_probe(struct platform_device *op)
-{
- struct resource res;
- resource_size_t physaddr;
- const u32 *id;
- int irq, bus_width, rc;
-
- /* device id */
- id = of_get_property(op->dev.of_node, "port-number", NULL);
-
- /* physaddr */
- rc = of_address_to_resource(op->dev.of_node, 0, &res);
- if (rc) {
- dev_err(&op->dev, "invalid address\n");
- return rc;
- }
- physaddr = res.start;
-
- /* irq */
- irq = irq_of_parse_and_map(op->dev.of_node, 0);
-
- /* bus width */
- bus_width = ACE_BUS_WIDTH_16;
- if (of_find_property(op->dev.of_node, "8-bit", NULL))
- bus_width = ACE_BUS_WIDTH_8;
-
- /* Call the bus-independent setup code */
- return ace_alloc(&op->dev, id ? be32_to_cpup(id) : 0,
- physaddr, irq, bus_width);
-}
-
-static int __devexit ace_of_remove(struct platform_device *op)
-{
- ace_free(&op->dev);
- return 0;
-}
-
/* Match table for of_platform binding */
static const struct of_device_id ace_of_match[] __devinitconst = {
{ .compatible = "xlnx,opb-sysace-1.00.b", },
@@ -1241,34 +1198,20 @@ static const struct of_device_id ace_of_match[] __devinitconst = {
{},
};
MODULE_DEVICE_TABLE(of, ace_of_match);
+#else /* CONFIG_OF */
+#define ace_of_match NULL
+#endif /* CONFIG_OF */
-static struct platform_driver ace_of_driver = {
- .probe = ace_of_probe,
- .remove = __devexit_p(ace_of_remove),
+static struct platform_driver ace_platform_driver = {
+ .probe = ace_probe,
+ .remove = __devexit_p(ace_remove),
.driver = {
- .name = "xsysace",
.owner = THIS_MODULE,
+ .name = "xsysace",
.of_match_table = ace_of_match,
},
};
-/* Registration helpers to keep the number of #ifdefs to a minimum */
-static inline int __init ace_of_register(void)
-{
- pr_debug("xsysace: registering OF binding\n");
- return platform_driver_register(&ace_of_driver);
-}
-
-static inline void __exit ace_of_unregister(void)
-{
- platform_driver_unregister(&ace_of_driver);
-}
-#else /* CONFIG_OF */
-/* CONFIG_OF not enabled; do nothing helpers */
-static inline int __init ace_of_register(void) { return 0; }
-static inline void __exit ace_of_unregister(void) { }
-#endif /* CONFIG_OF */
-
/* ---------------------------------------------------------------------
* Module init/exit routines
*/
@@ -1282,11 +1225,6 @@ static int __init ace_init(void)
goto err_blk;
}
- rc = ace_of_register();
- if (rc)
- goto err_of;
-
- pr_debug("xsysace: registering platform binding\n");
rc = platform_driver_register(&ace_platform_driver);
if (rc)
goto err_plat;
@@ -1295,21 +1233,17 @@ static int __init ace_init(void)
return 0;
err_plat:
- ace_of_unregister();
-err_of:
unregister_blkdev(ace_major, "xsysace");
err_blk:
printk(KERN_ERR "xsysace: registration failed; err=%i\n", rc);
return rc;
}
+module_init(ace_init);
static void __exit ace_exit(void)
{
pr_debug("Unregistering Xilinx SystemACE driver\n");
platform_driver_unregister(&ace_platform_driver);
- ace_of_unregister();
unregister_blkdev(ace_major, "xsysace");
}
-
-module_init(ace_init);
module_exit(ace_exit);
generated by cgit v1.2.3 (git 2.0.4) at 2024-06-30 10:14:03 +0000