diff options
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-core.c | 8 | ||||
| -rw-r--r-- | block/blk-ioc.c | 3 | ||||
| -rw-r--r-- | block/blk-timeout.c | 5 | ||||
| -rw-r--r-- | block/compat_ioctl.c | 1 | ||||
| -rw-r--r-- | block/genhd.c | 14 | ||||
| -rw-r--r-- | block/partitions/Kconfig | 11 | ||||
| -rw-r--r-- | block/partitions/Makefile | 1 | ||||
| -rw-r--r-- | block/partitions/aix.c | 293 | ||||
| -rw-r--r-- | block/partitions/aix.h | 1 | ||||
| -rw-r--r-- | block/partitions/msdos.c | 17 |
10 files changed, 338 insertions, 16 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index 33c33bc99ddd..93a18d1d3da8 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -2315,6 +2315,9 @@ bool blk_update_request(struct request *req, int error, unsigned int nr_bytes) case -EBADE: error_type = "critical nexus"; break; + case -ETIMEDOUT: + error_type = "timeout"; + break; case -EIO: default: error_type = "I/O"; @@ -3164,7 +3167,7 @@ void blk_post_runtime_resume(struct request_queue *q, int err) q->rpm_status = RPM_ACTIVE; __blk_run_queue(q); pm_runtime_mark_last_busy(q->dev); - pm_runtime_autosuspend(q->dev); + pm_request_autosuspend(q->dev); } else { q->rpm_status = RPM_SUSPENDED; } @@ -3180,7 +3183,8 @@ int __init blk_dev_init(void) /* used for unplugging and affects IO latency/throughput - HIGHPRI */ kblockd_workqueue = alloc_workqueue("kblockd", - WQ_MEM_RECLAIM | WQ_HIGHPRI, 0); + WQ_MEM_RECLAIM | WQ_HIGHPRI | + WQ_POWER_EFFICIENT, 0); if (!kblockd_workqueue) panic("Failed to create kblockd\n"); diff --git a/block/blk-ioc.c b/block/blk-ioc.c index 9c4bb8266bc8..4464c823cff2 100644 --- a/block/blk-ioc.c +++ b/block/blk-ioc.c @@ -144,7 +144,8 @@ void put_io_context(struct io_context *ioc) if (atomic_long_dec_and_test(&ioc->refcount)) { spin_lock_irqsave(&ioc->lock, flags); if (!hlist_empty(&ioc->icq_list)) - schedule_work(&ioc->release_work); + queue_work(system_power_efficient_wq, + &ioc->release_work); else free_ioc = true; spin_unlock_irqrestore(&ioc->lock, flags); diff --git a/block/blk-timeout.c b/block/blk-timeout.c index 6e4744cbfb56..65f103563969 100644 --- a/block/blk-timeout.c +++ b/block/blk-timeout.c @@ -82,9 +82,10 @@ void blk_delete_timer(struct request *req) static void blk_rq_timed_out(struct request *req) { struct request_queue *q = req->q; - enum blk_eh_timer_return ret; + enum blk_eh_timer_return ret = BLK_EH_RESET_TIMER; - ret = q->rq_timed_out_fn(req); + if (q->rq_timed_out_fn) + ret = q->rq_timed_out_fn(req); switch (ret) { case BLK_EH_HANDLED: __blk_complete_request(req); diff --git a/block/compat_ioctl.c b/block/compat_ioctl.c index 7c668c8a6f95..7e5d474dc6ba 100644 --- a/block/compat_ioctl.c +++ b/block/compat_ioctl.c @@ -59,6 +59,7 @@ static int compat_hdio_getgeo(struct gendisk *disk, struct block_device *bdev, if (!disk->fops->getgeo) return -ENOTTY; + memset(&geo, 0, sizeof(geo)); /* * We need to set the startsect first, the driver may * want to override it. diff --git a/block/genhd.c b/block/genhd.c index 20625eed5511..dadf42b454a3 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -512,7 +512,7 @@ static void register_disk(struct gendisk *disk) ddev->parent = disk->driverfs_dev; - dev_set_name(ddev, disk->disk_name); + dev_set_name(ddev, "%s", disk->disk_name); /* delay uevents, until we scanned partition table */ dev_set_uevent_suppress(ddev, 1); @@ -1489,9 +1489,11 @@ static void __disk_unblock_events(struct gendisk *disk, bool check_now) intv = disk_events_poll_jiffies(disk); set_timer_slack(&ev->dwork.timer, intv / 4); if (check_now) - queue_delayed_work(system_freezable_wq, &ev->dwork, 0); + queue_delayed_work(system_freezable_power_efficient_wq, + &ev->dwork, 0); else if (intv) - queue_delayed_work(system_freezable_wq, &ev->dwork, intv); + queue_delayed_work(system_freezable_power_efficient_wq, + &ev->dwork, intv); out_unlock: spin_unlock_irqrestore(&ev->lock, flags); } @@ -1534,7 +1536,8 @@ void disk_flush_events(struct gendisk *disk, unsigned int mask) spin_lock_irq(&ev->lock); ev->clearing |= mask; if (!ev->block) - mod_delayed_work(system_freezable_wq, &ev->dwork, 0); + mod_delayed_work(system_freezable_power_efficient_wq, + &ev->dwork, 0); spin_unlock_irq(&ev->lock); } @@ -1627,7 +1630,8 @@ static void disk_check_events(struct disk_events *ev, intv = disk_events_poll_jiffies(disk); if (!ev->block && intv) - queue_delayed_work(system_freezable_wq, &ev->dwork, intv); + queue_delayed_work(system_freezable_power_efficient_wq, + &ev->dwork, intv); spin_unlock_irq(&ev->lock); diff --git a/block/partitions/Kconfig b/block/partitions/Kconfig index 75a54e1adbb5..4cebb2f0d2f4 100644 --- a/block/partitions/Kconfig +++ b/block/partitions/Kconfig @@ -68,6 +68,17 @@ config ACORN_PARTITION_RISCIX of machines called RISCiX. If you say 'Y' here, Linux will be able to read disks partitioned under RISCiX. +config AIX_PARTITION + bool "AIX basic partition table support" if PARTITION_ADVANCED + help + Say Y here if you would like to be able to read the hard disk + partition table format used by IBM or Motorola PowerPC machines + running AIX. AIX actually uses a Logical Volume Manager, where + "logical volumes" can be spread across one or multiple disks, + but this driver works only for the simple case of partitions which + are contiguous. + Otherwise, say N. + config OSF_PARTITION bool "Alpha OSF partition support" if PARTITION_ADVANCED default y if ALPHA diff --git a/block/partitions/Makefile b/block/partitions/Makefile index 03af8eac51da..2be4d7ba4e3a 100644 --- a/block/partitions/Makefile +++ b/block/partitions/Makefile @@ -7,6 +7,7 @@ obj-$(CONFIG_BLOCK) := check.o obj-$(CONFIG_ACORN_PARTITION) += acorn.o obj-$(CONFIG_AMIGA_PARTITION) += amiga.o obj-$(CONFIG_ATARI_PARTITION) += atari.o +obj-$(CONFIG_AIX_PARTITION) += aix.o obj-$(CONFIG_MAC_PARTITION) += mac.o obj-$(CONFIG_LDM_PARTITION) += ldm.o obj-$(CONFIG_MSDOS_PARTITION) += msdos.o diff --git a/block/partitions/aix.c b/block/partitions/aix.c new file mode 100644 index 000000000000..43be471d9b1d --- /dev/null +++ b/block/partitions/aix.c @@ -0,0 +1,293 @@ +/* + * fs/partitions/aix.c + * + * Copyright (C) 2012-2013 Philippe De Muyter <phdm@macqel.be> + */ + +#include "check.h" +#include "aix.h" + +struct lvm_rec { + char lvm_id[4]; /* "_LVM" */ + char reserved4[16]; + __be32 lvmarea_len; + __be32 vgda_len; + __be32 vgda_psn[2]; + char reserved36[10]; + __be16 pp_size; /* log2(pp_size) */ + char reserved46[12]; + __be16 version; + }; + +struct vgda { + __be32 secs; + __be32 usec; + char reserved8[16]; + __be16 numlvs; + __be16 maxlvs; + __be16 pp_size; + __be16 numpvs; + __be16 total_vgdas; + __be16 vgda_size; + }; + +struct lvd { + __be16 lv_ix; + __be16 res2; + __be16 res4; + __be16 maxsize; + __be16 lv_state; + __be16 mirror; + __be16 mirror_policy; + __be16 num_lps; + __be16 res10[8]; + }; + +struct lvname { + char name[64]; + }; + +struct ppe { + __be16 lv_ix; + unsigned short res2; + unsigned short res4; + __be16 lp_ix; + unsigned short res8[12]; + }; + +struct pvd { + char reserved0[16]; + __be16 pp_count; + char reserved18[2]; + __be32 psn_part1; + char reserved24[8]; + struct ppe ppe[1016]; + }; + +#define LVM_MAXLVS 256 + +/** + * last_lba(): return number of last logical block of device + * @bdev: block device + * + * Description: Returns last LBA value on success, 0 on error. + * This is stored (by sd and ide-geometry) in + * the part[0] entry for this disk, and is the number of + * physical sectors available on the disk. + */ +static u64 last_lba(struct block_device *bdev) +{ + if (!bdev || !bdev->bd_inode) + return 0; + return (bdev->bd_inode->i_size >> 9) - 1ULL; +} + +/** + * read_lba(): Read bytes from disk, starting at given LBA + * @state + * @lba + * @buffer + * @count + * + * Description: Reads @count bytes from @state->bdev into @buffer. + * Returns number of bytes read on success, 0 on error. + */ +static size_t read_lba(struct parsed_partitions *state, u64 lba, u8 *buffer, + size_t count) +{ + size_t totalreadcount = 0; + + if (!buffer || lba + count / 512 > last_lba(state->bdev)) + return 0; + + while (count) { + int copied = 512; + Sector sect; + unsigned char *data = read_part_sector(state, lba++, §); + if (!data) + break; + if (copied > count) + copied = count; + memcpy(buffer, data, copied); + put_dev_sector(sect); + buffer += copied; + totalreadcount += copied; + count -= copied; + } + return totalreadcount; +} + +/** + * alloc_pvd(): reads physical volume descriptor + * @state + * @lba + * + * Description: Returns pvd on success, NULL on error. + * Allocates space for pvd and fill it with disk blocks at @lba + * Notes: remember to free pvd when you're done! + */ +static struct pvd *alloc_pvd(struct parsed_partitions *state, u32 lba) +{ + size_t count = sizeof(struct pvd); + struct pvd *p; + + p = kmalloc(count, GFP_KERNEL); + if (!p) + return NULL; + + if (read_lba(state, lba, (u8 *) p, count) < count) { + kfree(p); + return NULL; + } + return p; +} + +/** + * alloc_lvn(): reads logical volume names + * @state + * @lba + * + * Description: Returns lvn on success, NULL on error. + * Allocates space for lvn and fill it with disk blocks at @lba + * Notes: remember to free lvn when you're done! + */ +static struct lvname *alloc_lvn(struct parsed_partitions *state, u32 lba) +{ + size_t count = sizeof(struct lvname) * LVM_MAXLVS; + struct lvname *p; + + p = kmalloc(count, GFP_KERNEL); + if (!p) + return NULL; + + if (read_lba(state, lba, (u8 *) p, count) < count) { + kfree(p); + return NULL; + } + return p; +} + +int aix_partition(struct parsed_partitions *state) +{ + int ret = 0; + Sector sect; + unsigned char *d; + u32 pp_bytes_size; + u32 pp_blocks_size = 0; + u32 vgda_sector = 0; + u32 vgda_len = 0; + int numlvs = 0; + struct pvd *pvd; + struct lv_info { + unsigned short pps_per_lv; + unsigned short pps_found; + unsigned char lv_is_contiguous; + } *lvip; + struct lvname *n = NULL; + + d = read_part_sector(state, 7, §); + if (d) { + struct lvm_rec *p = (struct lvm_rec *)d; + u16 lvm_version = be16_to_cpu(p->version); + char tmp[64]; + + if (lvm_version == 1) { + int pp_size_log2 = be16_to_cpu(p->pp_size); + + pp_bytes_size = 1 << pp_size_log2; + pp_blocks_size = pp_bytes_size / 512; + snprintf(tmp, sizeof(tmp), + " AIX LVM header version %u found\n", + lvm_version); + vgda_len = be32_to_cpu(p->vgda_len); + vgda_sector = be32_to_cpu(p->vgda_psn[0]); + } else { + snprintf(tmp, sizeof(tmp), + " unsupported AIX LVM version %d found\n", + lvm_version); + } + strlcat(state->pp_buf, tmp, PAGE_SIZE); + put_dev_sector(sect); + } + if (vgda_sector && (d = read_part_sector(state, vgda_sector, §))) { + struct vgda *p = (struct vgda *)d; + + numlvs = be16_to_cpu(p->numlvs); + put_dev_sector(sect); + } + lvip = kzalloc(sizeof(struct lv_info) * state->limit, GFP_KERNEL); + if (!lvip) + return 0; + if (numlvs && (d = read_part_sector(state, vgda_sector + 1, §))) { + struct lvd *p = (struct lvd *)d; + int i; + + n = alloc_lvn(state, vgda_sector + vgda_len - 33); + if (n) { + int foundlvs = 0; + + for (i = 0; foundlvs < numlvs && i < state->limit; i += 1) { + lvip[i].pps_per_lv = be16_to_cpu(p[i].num_lps); + if (lvip[i].pps_per_lv) + foundlvs += 1; + } + } + put_dev_sector(sect); + } + pvd = alloc_pvd(state, vgda_sector + 17); + if (pvd) { + int numpps = be16_to_cpu(pvd->pp_count); + int psn_part1 = be32_to_cpu(pvd->psn_part1); + int i; + int cur_lv_ix = -1; + int next_lp_ix = 1; + int lp_ix; + + for (i = 0; i < numpps; i += 1) { + struct ppe *p = pvd->ppe + i; + unsigned int lv_ix; + + lp_ix = be16_to_cpu(p->lp_ix); + if (!lp_ix) { + next_lp_ix = 1; + continue; + } + lv_ix = be16_to_cpu(p->lv_ix) - 1; + if (lv_ix > state->limit) { + cur_lv_ix = -1; + continue; + } + lvip[lv_ix].pps_found += 1; + if (lp_ix == 1) { + cur_lv_ix = lv_ix; + next_lp_ix = 1; + } else if (lv_ix != cur_lv_ix || lp_ix != next_lp_ix) { + next_lp_ix = 1; + continue; + } + if (lp_ix == lvip[lv_ix].pps_per_lv) { + char tmp[70]; + + put_partition(state, lv_ix + 1, + (i + 1 - lp_ix) * pp_blocks_size + psn_part1, + lvip[lv_ix].pps_per_lv * pp_blocks_size); + snprintf(tmp, sizeof(tmp), " <%s>\n", + n[lv_ix].name); + strlcat(state->pp_buf, tmp, PAGE_SIZE); + lvip[lv_ix].lv_is_contiguous = 1; + ret = 1; + next_lp_ix = 1; + } else + next_lp_ix += 1; + } + for (i = 0; i < state->limit; i += 1) + if (lvip[i].pps_found && !lvip[i].lv_is_contiguous) + pr_warn("partition %s (%u pp's found) is " + "not contiguous\n", + n[i].name, lvip[i].pps_found); + kfree(pvd); + } + kfree(n); + kfree(lvip); + return ret; +} diff --git a/block/partitions/aix.h b/block/partitions/aix.h new file mode 100644 index 000000000000..e0c66a987523 --- /dev/null +++ b/block/partitions/aix.h @@ -0,0 +1 @@ +extern int aix_partition(struct parsed_partitions *state); diff --git a/block/partitions/msdos.c b/block/partitions/msdos.c index 7681cd295ab8..9123f250b425 100644 --- a/block/partitions/msdos.c +++ b/block/partitions/msdos.c @@ -23,6 +23,7 @@ #include "check.h" #include "msdos.h" #include "efi.h" +#include "aix.h" /* * Many architectures don't like unaligned accesses, while @@ -90,7 +91,7 @@ static int aix_magic_present(struct parsed_partitions *state, unsigned char *p) if (d[0] == '_' && d[1] == 'L' && d[2] == 'V' && d[3] == 'M') ret = 1; put_dev_sector(sect); - }; + } return ret; } @@ -142,7 +143,7 @@ static void parse_extended(struct parsed_partitions *state, return; if (!msdos_magic_present(data + 510)) - goto done; + goto done; p = (struct partition *) (data + 0x1be); @@ -155,7 +156,7 @@ static void parse_extended(struct parsed_partitions *state, * and OS/2 seems to use all four entries. */ - /* + /* * First process the data partition(s) */ for (i=0; i<4; i++, p++) { @@ -263,7 +264,7 @@ static void parse_solaris_x86(struct parsed_partitions *state, } #if defined(CONFIG_BSD_DISKLABEL) -/* +/* * Create devices for BSD partitions listed in a disklabel, under a * dos-like partition. See parse_extended() for more information. */ @@ -294,7 +295,7 @@ static void parse_bsd(struct parsed_partitions *state, if (state->next == state->limit) break; - if (p->p_fstype == BSD_FS_UNUSED) + if (p->p_fstype == BSD_FS_UNUSED) continue; bsd_start = le32_to_cpu(p->p_offset); bsd_size = le32_to_cpu(p->p_size); @@ -441,7 +442,7 @@ static struct { {NEW_SOLARIS_X86_PARTITION, parse_solaris_x86}, {0, NULL}, }; - + int msdos_partition(struct parsed_partitions *state) { sector_t sector_size = bdev_logical_block_size(state->bdev) / 512; @@ -462,8 +463,12 @@ int msdos_partition(struct parsed_partitions *state) */ if (aix_magic_present(state, data)) { put_dev_sector(sect); +#ifdef CONFIG_AIX_PARTITION + return aix_partition(state); +#else strlcat(state->pp_buf, " [AIX]", PAGE_SIZE); return 0; +#endif } if (!msdos_magic_present(data + 510)) { |