diff options
Diffstat (limited to 'drivers/block')
-rw-r--r-- | drivers/block/Kconfig | 15 | ||||
-rw-r--r-- | drivers/block/cciss.h | 2 | ||||
-rw-r--r-- | drivers/block/cciss_scsi.c | 2 | ||||
-rw-r--r-- | drivers/block/drbd/drbd_actlog.c | 2 | ||||
-rw-r--r-- | drivers/block/drbd/drbd_bitmap.c | 37 | ||||
-rw-r--r-- | drivers/block/drbd/drbd_nl.c | 4 | ||||
-rw-r--r-- | drivers/block/drbd/drbd_receiver.c | 6 | ||||
-rw-r--r-- | drivers/block/drbd/drbd_worker.c | 7 | ||||
-rw-r--r-- | drivers/block/hd.c | 2 | ||||
-rw-r--r-- | drivers/block/loop.c | 297 | ||||
-rw-r--r-- | drivers/block/pktcdvd.c | 2 | ||||
-rw-r--r-- | drivers/block/rbd.c | 46 | ||||
-rw-r--r-- | drivers/block/swim3.c | 1 | ||||
-rw-r--r-- | drivers/block/xen-blkback/xenbus.c | 2 | ||||
-rw-r--r-- | drivers/block/xsysace.c | 98 |
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 6cc0db1bf522..3f129b45451a 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); |