search for: hd_struct

...,10 @@ static int exact_lock(dev_t devt, void *data) return 0; } -static void register_disk(struct gendisk *disk) +static void register_disk(struct gendisk *disk, bool gen_uevent) { struct device *ddev = disk_to_dev(disk); struct block_device *bdev; - struct disk_part_iter piter; - struct hd_struct *part; int err; ddev->parent = disk->driverfs_dev; @@ -563,6 +561,22 @@ static void register_disk(struct gendisk *disk) exit: /* announce disk after possible partitions are created */ dev_set_uevent_suppress(ddev, 0); + if (gen_uevent) + disk_gen_uevents(disk); +} + +/** + * disk_...

...ents(disk); - blk_integrity_add(disk); + return retval; } EXPORT_SYMBOL(device_add_disk); diff --git a/include/linux/genhd.h b/include/linux/genhd.h index 85ce560..991b5ff 100644 --- a/include/linux/genhd.h +++ b/include/linux/genhd.h @@ -413,7 +413,7 @@ static inline void free_part_info(struct hd_struct *part) extern void part_round_stats(int cpu, struct hd_struct *part); /* block/genhd.c */ -extern void device_add_disk(struct device *parent, struct gendisk *disk); +extern int device_add_disk(struct device *parent, struct gendisk *disk); extern void del_gendisk(struct gendisk *gp); extern...

The race condition is noticed between disk_add() and disk attributes, on virtio-blk hotplug. Userspace listens to the KOBJ_ADD uevent generated in add_disk(). At that point we haven't created the serial attribute file, therefore depending on how fast udev reacts, the /dev/disk/by-id/ entry doesn't always get created. As pointed out by Christoph Hellwig in the specific fix [1], virtio-blk

The race condition is noticed between disk_add() and disk attributes, on virtio-blk hotplug. Userspace listens to the KOBJ_ADD uevent generated in add_disk(). At that point we haven't created the serial attribute file, therefore depending on how fast udev reacts, the /dev/disk/by-id/ entry doesn't always get created. As pointed out by Christoph Hellwig in the specific fix [1], virtio-blk

This patch series renames "sd_format_disk_name()" to "disk_name_format()" and moves it into block core. So that who needs formatting disk name can use it, instead of duplicating these similar help functions. Ren Mingxin (4): block: add function disk_name_format() into block core scsi: replace sd_format_disk_name() to disk_name_format() block: replace

This patch series renames "sd_format_disk_name()" to "disk_name_format()" and moves it into block core. So that who needs formatting disk name can use it, instead of duplicating these similar help functions. Ren Mingxin (4): block: add function disk_name_format() into block core scsi: replace sd_format_disk_name() to disk_name_format() block: replace

...uct virtblk_req u8 status; }; +static inline void update_stat(struct virtio_blk *vb, int idx, + u16 tag, u64 val) +{ + BUG_ON(idx >= VIRTIO_BLK_S_NR); + vb->stats[idx].tag = tag; + vb->stats[idx].val = val; +} + +static void update_blk_stats(struct virtio_blk *vb) +{ + struct hd_struct *p = disk_get_part(vb->disk, 0); + int cpu; + int idx = 0; + + cpu = part_stat_lock(); + part_round_stats(cpu, p); + part_stat_unlock(); + + update_stat(vb, idx++, VIRTIO_BLK_S_READ_IO, + part_stat_read(p, ios[READ])); + update_stat(vb, idx++, VIRTIO_BLK_S_READ_MERGES, + part_stat_read...

...uct virtblk_req u8 status; }; +static inline void update_stat(struct virtio_blk *vb, int idx, + u16 tag, u64 val) +{ + BUG_ON(idx >= VIRTIO_BLK_S_NR); + vb->stats[idx].tag = tag; + vb->stats[idx].val = val; +} + +static void update_blk_stats(struct virtio_blk *vb) +{ + struct hd_struct *p = disk_get_part(vb->disk, 0); + int cpu; + int idx = 0; + + cpu = part_stat_lock(); + part_round_stats(cpu, p); + part_stat_unlock(); + + update_stat(vb, idx++, VIRTIO_BLK_S_READ_IO, + part_stat_read(p, ios[READ])); + update_stat(vb, idx++, VIRTIO_BLK_S_READ_MERGES, + part_stat_read...

This is an attempt to fix the issue that some disks' sysfs attributes are not ready at the time its KOBJ_ADD event is sent. The symptom is during device hotplug, udev may fail to find certain attributes, such as serial or wwn, of the disk. As a result the /dev/disk/by-id entries are not created. The cause is device_add_disk emits the uevent before returning, and the callers have to create

This is an attempt to fix the issue that some disks' sysfs attributes are not ready at the time its KOBJ_ADD event is sent. The symptom is during device hotplug, udev may fail to find certain attributes, such as serial or wwn, of the disk. As a result the /dev/disk/by-id entries are not created. The cause is device_add_disk emits the uevent before returning, and the callers have to create

From: John Hubbard <jhubbard at nvidia.com> Hi, This is mostly Jerome's work, converting the block/bio and related areas to call put_user_page*() instead of put_page(). Because I've changed Jerome's patches, in some cases significantly, I'd like to get his feedback before we actually leave him listed as the author (he might want to disown some or all of these). I added a

From: John Hubbard <jhubbard at nvidia.com> Hi, This is mostly Jerome's work, converting the block/bio and related areas to call put_user_page*() instead of put_page(). Because I've changed Jerome's patches, in some cases significantly, I'd like to get his feedback before we actually leave him listed as the author (he might want to disown some or all of these). I added a

Hi Jens, this series removes the revalidate_disk() function, which has been a really odd duck in the last years. The prime reason why most people use it is because it propagates a size change from the gendisk to the block_device structure. But it also calls into the rather ill defined ->revalidate_disk method which is rather useless for the callers. So this adds a new helper to just

...{ + struct blk_queue_ctx *ctx = rq->queue_ctx; + + BUG_ON(!irqs_disabled()); + drive_stat_acct(rq, 1); - __elv_add_request(q, rq, where); + spin_lock(&ctx->lock); + __elv_add_request(rq, where); + spin_unlock(&ctx->lock); } static void part_round_stats_single(int cpu, struct hd_struct *part, unsigned long now) { if (now == part->stamp) return; if (part_in_flight(part)) { @@ -1116,54 +1087,56 @@ void part_round_stats(int cpu, struct hd_struct *part) if (part->partno) part_round_stats_single(cpu, &part_to_disk(part)->part0, now); part_round_s...

...{ + struct blk_queue_ctx *ctx = rq->queue_ctx; + + BUG_ON(!irqs_disabled()); + drive_stat_acct(rq, 1); - __elv_add_request(q, rq, where); + spin_lock(&ctx->lock); + __elv_add_request(rq, where); + spin_unlock(&ctx->lock); } static void part_round_stats_single(int cpu, struct hd_struct *part, unsigned long now) { if (now == part->stamp) return; if (part_in_flight(part)) { @@ -1116,54 +1087,56 @@ void part_round_stats(int cpu, struct hd_struct *part) if (part->partno) part_round_stats_single(cpu, &part_to_disk(part)->part0, now); part_round_s...