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-rw-r--r--drivers/md/bitmap.c16
-rw-r--r--drivers/md/linear.c8
-rw-r--r--drivers/md/md.c601
-rw-r--r--drivers/md/md.h34
-rw-r--r--drivers/md/multipath.c28
-rw-r--r--drivers/md/raid0.c9
-rw-r--r--drivers/md/raid1.c37
-rw-r--r--drivers/md/raid1.h2
-rw-r--r--drivers/md/raid10.c18
-rw-r--r--drivers/md/raid5.c29
-rw-r--r--drivers/md/raid5.h4
11 files changed, 260 insertions, 526 deletions
diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c
index 67f8b31e2054..da3604e73e8a 100644
--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c
@@ -879,7 +879,6 @@ void bitmap_unplug(struct bitmap *bitmap)
{
unsigned long i;
int dirty, need_write;
- int wait = 0;
if (!bitmap || !bitmap->storage.filemap ||
test_bit(BITMAP_STALE, &bitmap->flags))
@@ -897,16 +896,13 @@ void bitmap_unplug(struct bitmap *bitmap)
clear_page_attr(bitmap, i, BITMAP_PAGE_PENDING);
write_page(bitmap, bitmap->storage.filemap[i], 0);
}
- if (dirty)
- wait = 1;
- }
- if (wait) { /* if any writes were performed, we need to wait on them */
- if (bitmap->storage.file)
- wait_event(bitmap->write_wait,
- atomic_read(&bitmap->pending_writes)==0);
- else
- md_super_wait(bitmap->mddev);
}
+ if (bitmap->storage.file)
+ wait_event(bitmap->write_wait,
+ atomic_read(&bitmap->pending_writes)==0);
+ else
+ md_super_wait(bitmap->mddev);
+
if (test_bit(BITMAP_WRITE_ERROR, &bitmap->flags))
bitmap_file_kick(bitmap);
}
diff --git a/drivers/md/linear.c b/drivers/md/linear.c
index 56f534b4a2d2..64713b77df1c 100644
--- a/drivers/md/linear.c
+++ b/drivers/md/linear.c
@@ -10,10 +10,10 @@
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
-
+
You should have received a copy of the GNU General Public License
(for example /usr/src/linux/COPYING); if not, write to the Free
- Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/blkdev.h>
@@ -25,7 +25,7 @@
#include "linear.h"
/*
- * find which device holds a particular offset
+ * find which device holds a particular offset
*/
static inline struct dev_info *which_dev(struct mddev *mddev, sector_t sector)
{
@@ -355,7 +355,6 @@ static void linear_status (struct seq_file *seq, struct mddev *mddev)
seq_printf(seq, " %dk rounding", mddev->chunk_sectors / 2);
}
-
static struct md_personality linear_personality =
{
.name = "linear",
@@ -379,7 +378,6 @@ static void linear_exit (void)
unregister_md_personality (&linear_personality);
}
-
module_init(linear_init);
module_exit(linear_exit);
MODULE_LICENSE("GPL");
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 1294238610df..4dfa15da9cb8 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -1,6 +1,6 @@
/*
md.c : Multiple Devices driver for Linux
- Copyright (C) 1998, 1999, 2000 Ingo Molnar
+ Copyright (C) 1998, 1999, 2000 Ingo Molnar
completely rewritten, based on the MD driver code from Marc Zyngier
@@ -66,8 +66,6 @@ static void autostart_arrays(int part);
static LIST_HEAD(pers_list);
static DEFINE_SPINLOCK(pers_lock);
-static void md_print_devices(void);
-
static DECLARE_WAIT_QUEUE_HEAD(resync_wait);
static struct workqueue_struct *md_wq;
static struct workqueue_struct *md_misc_wq;
@@ -75,8 +73,6 @@ static struct workqueue_struct *md_misc_wq;
static int remove_and_add_spares(struct mddev *mddev,
struct md_rdev *this);
-#define MD_BUG(x...) { printk("md: bug in file %s, line %d\n", __FILE__, __LINE__); md_print_devices(); }
-
/*
* Default number of read corrections we'll attempt on an rdev
* before ejecting it from the array. We divide the read error
@@ -218,7 +214,6 @@ static void md_new_event_inintr(struct mddev *mddev)
static LIST_HEAD(all_mddevs);
static DEFINE_SPINLOCK(all_mddevs_lock);
-
/*
* iterates through all used mddevs in the system.
* We take care to grab the all_mddevs_lock whenever navigating
@@ -228,7 +223,7 @@ static DEFINE_SPINLOCK(all_mddevs_lock);
*/
#define for_each_mddev(_mddev,_tmp) \
\
- for (({ spin_lock(&all_mddevs_lock); \
+ for (({ spin_lock(&all_mddevs_lock); \
_tmp = all_mddevs.next; \
_mddev = NULL;}); \
({ if (_tmp != &all_mddevs) \
@@ -241,7 +236,6 @@ static DEFINE_SPINLOCK(all_mddevs_lock);
_tmp = _tmp->next;}) \
)
-
/* Rather than calling directly into the personality make_request function,
* IO requests come here first so that we can check if the device is
* being suspended pending a reconfiguration.
@@ -488,7 +482,7 @@ void mddev_init(struct mddev *mddev)
}
EXPORT_SYMBOL_GPL(mddev_init);
-static struct mddev * mddev_find(dev_t unit)
+static struct mddev *mddev_find(dev_t unit)
{
struct mddev *mddev, *new = NULL;
@@ -530,7 +524,7 @@ static struct mddev * mddev_find(dev_t unit)
kfree(new);
return NULL;
}
-
+
is_free = 1;
list_for_each_entry(mddev, &all_mddevs, all_mddevs)
if (mddev->unit == dev) {
@@ -562,7 +556,7 @@ static struct mddev * mddev_find(dev_t unit)
goto retry;
}
-static inline int __must_check mddev_lock(struct mddev * mddev)
+static inline int __must_check mddev_lock(struct mddev *mddev)
{
return mutex_lock_interruptible(&mddev->reconfig_mutex);
}
@@ -570,7 +564,7 @@ static inline int __must_check mddev_lock(struct mddev * mddev)
/* Sometimes we need to take the lock in a situation where
* failure due to interrupts is not acceptable.
*/
-static inline void mddev_lock_nointr(struct mddev * mddev)
+static inline void mddev_lock_nointr(struct mddev *mddev)
{
mutex_lock(&mddev->reconfig_mutex);
}
@@ -580,14 +574,14 @@ static inline int mddev_is_locked(struct mddev *mddev)
return mutex_is_locked(&mddev->reconfig_mutex);
}
-static inline int mddev_trylock(struct mddev * mddev)
+static inline int mddev_trylock(struct mddev *mddev)
{
return mutex_trylock(&mddev->reconfig_mutex);
}
static struct attribute_group md_redundancy_group;
-static void mddev_unlock(struct mddev * mddev)
+static void mddev_unlock(struct mddev *mddev)
{
if (mddev->to_remove) {
/* These cannot be removed under reconfig_mutex as
@@ -630,17 +624,6 @@ static void mddev_unlock(struct mddev * mddev)
spin_unlock(&pers_lock);
}
-static struct md_rdev * find_rdev_nr(struct mddev *mddev, int nr)
-{
- struct md_rdev *rdev;
-
- rdev_for_each(rdev, mddev)
- if (rdev->desc_nr == nr)
- return rdev;
-
- return NULL;
-}
-
static struct md_rdev *find_rdev_nr_rcu(struct mddev *mddev, int nr)
{
struct md_rdev *rdev;
@@ -693,11 +676,8 @@ static inline sector_t calc_dev_sboffset(struct md_rdev *rdev)
return MD_NEW_SIZE_SECTORS(num_sectors);
}
-static int alloc_disk_sb(struct md_rdev * rdev)
+static int alloc_disk_sb(struct md_rdev *rdev)
{
- if (rdev->sb_page)
- MD_BUG();
-
rdev->sb_page = alloc_page(GFP_KERNEL);
if (!rdev->sb_page) {
printk(KERN_ALERT "md: out of memory.\n");
@@ -766,14 +746,7 @@ void md_super_write(struct mddev *mddev, struct md_rdev *rdev,
void md_super_wait(struct mddev *mddev)
{
/* wait for all superblock writes that were scheduled to complete */
- DEFINE_WAIT(wq);
- for(;;) {
- prepare_to_wait(&mddev->sb_wait, &wq, TASK_UNINTERRUPTIBLE);
- if (atomic_read(&mddev->pending_writes)==0)
- break;
- schedule();
- }
- finish_wait(&mddev->sb_wait, &wq);
+ wait_event(mddev->sb_wait, atomic_read(&mddev->pending_writes)==0);
}
int sync_page_io(struct md_rdev *rdev, sector_t sector, int size,
@@ -801,17 +774,13 @@ int sync_page_io(struct md_rdev *rdev, sector_t sector, int size,
}
EXPORT_SYMBOL_GPL(sync_page_io);
-static int read_disk_sb(struct md_rdev * rdev, int size)
+static int read_disk_sb(struct md_rdev *rdev, int size)
{
char b[BDEVNAME_SIZE];
- if (!rdev->sb_page) {
- MD_BUG();
- return -EINVAL;
- }
+
if (rdev->sb_loaded)
return 0;
-
if (!sync_page_io(rdev, 0, size, rdev->sb_page, READ, true))
goto fail;
rdev->sb_loaded = 1;
@@ -825,7 +794,7 @@ fail:
static int uuid_equal(mdp_super_t *sb1, mdp_super_t *sb2)
{
- return sb1->set_uuid0 == sb2->set_uuid0 &&
+ return sb1->set_uuid0 == sb2->set_uuid0 &&
sb1->set_uuid1 == sb2->set_uuid1 &&
sb1->set_uuid2 == sb2->set_uuid2 &&
sb1->set_uuid3 == sb2->set_uuid3;
@@ -861,14 +830,13 @@ abort:
return ret;
}
-
static u32 md_csum_fold(u32 csum)
{
csum = (csum & 0xffff) + (csum >> 16);
return (csum & 0xffff) + (csum >> 16);
}
-static unsigned int calc_sb_csum(mdp_super_t * sb)
+static unsigned int calc_sb_csum(mdp_super_t *sb)
{
u64 newcsum = 0;
u32 *sb32 = (u32*)sb;
@@ -882,7 +850,6 @@ static unsigned int calc_sb_csum(mdp_super_t * sb)
newcsum += sb32[i];
csum = (newcsum & 0xffffffff) + (newcsum>>32);
-
#ifdef CONFIG_ALPHA
/* This used to use csum_partial, which was wrong for several
* reasons including that different results are returned on
@@ -899,7 +866,6 @@ static unsigned int calc_sb_csum(mdp_super_t * sb)
return csum;
}
-
/*
* Handle superblock details.
* We want to be able to handle multiple superblock formats
@@ -965,7 +931,7 @@ int md_check_no_bitmap(struct mddev *mddev)
EXPORT_SYMBOL(md_check_no_bitmap);
/*
- * load_super for 0.90.0
+ * load_super for 0.90.0
*/
static int super_90_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version)
{
@@ -1044,7 +1010,7 @@ static int super_90_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor
ev2 = md_event(refsb);
if (ev1 > ev2)
ret = 1;
- else
+ else
ret = 0;
}
rdev->sectors = rdev->sb_start;
@@ -1118,7 +1084,7 @@ static int super_90_validate(struct mddev *mddev, struct md_rdev *rdev)
if (sb->state & (1<<MD_SB_CLEAN))
mddev->recovery_cp = MaxSector;
else {
- if (sb->events_hi == sb->cp_events_hi &&
+ if (sb->events_hi == sb->cp_events_hi &&
sb->events_lo == sb->cp_events_lo) {
mddev->recovery_cp = sb->recovery_cp;
} else
@@ -1146,7 +1112,7 @@ static int super_90_validate(struct mddev *mddev, struct md_rdev *rdev)
++ev1;
if (sb->disks[rdev->desc_nr].state & (
(1<<MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE)))
- if (ev1 < mddev->events)
+ if (ev1 < mddev->events)
return -EINVAL;
} else if (mddev->bitmap) {
/* if adding to array with a bitmap, then we can accept an
@@ -1197,7 +1163,6 @@ static void super_90_sync(struct mddev *mddev, struct md_rdev *rdev)
struct md_rdev *rdev2;
int next_spare = mddev->raid_disks;
-
/* make rdev->sb match mddev data..
*
* 1/ zero out disks
@@ -1366,7 +1331,7 @@ super_90_allow_new_offset(struct md_rdev *rdev, unsigned long long new_offset)
* version 1 superblock
*/
-static __le32 calc_sb_1_csum(struct mdp_superblock_1 * sb)
+static __le32 calc_sb_1_csum(struct mdp_superblock_1 *sb)
{
__le32 disk_csum;
u32 csum;
@@ -1430,7 +1395,6 @@ static int super_1_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_
ret = read_disk_sb(rdev, 4096);
if (ret) return ret;
-
sb = page_address(rdev->sb_page);
if (sb->magic != cpu_to_le32(MD_SB_MAGIC) ||
@@ -1817,7 +1781,7 @@ retry:
for (i=0; i<max_dev;i++)
sb->dev_roles[i] = cpu_to_le16(0xfffe);
-
+
rdev_for_each(rdev2, mddev) {
i = rdev2->desc_nr;
if (test_bit(Faulty, &rdev2->flags))
@@ -2033,18 +1997,13 @@ void md_integrity_add_rdev(struct md_rdev *rdev, struct mddev *mddev)
}
EXPORT_SYMBOL(md_integrity_add_rdev);
-static int bind_rdev_to_array(struct md_rdev * rdev, struct mddev * mddev)
+static int bind_rdev_to_array(struct md_rdev *rdev, struct mddev *mddev)
{
char b[BDEVNAME_SIZE];
struct kobject *ko;
char *s;
int err;
- if (rdev->mddev) {
- MD_BUG();
- return -EINVAL;
- }
-
/* prevent duplicates */
if (find_rdev(mddev, rdev->bdev->bd_dev))
return -EEXIST;
@@ -2067,16 +2026,21 @@ static int bind_rdev_to_array(struct md_rdev * rdev, struct mddev * mddev)
* If it is -1, assign a free number, else
* check number is not in use
*/
+ rcu_read_lock();
if (rdev->desc_nr < 0) {
int choice = 0;
- if (mddev->pers) choice = mddev->raid_disks;
- while (find_rdev_nr(mddev, choice))
+ if (mddev->pers)
+ choice = mddev->raid_disks;
+ while (find_rdev_nr_rcu(mddev, choice))
choice++;
rdev->desc_nr = choice;
} else {
- if (find_rdev_nr(mddev, rdev->desc_nr))
+ if (find_rdev_nr_rcu(mddev, rdev->desc_nr)) {
+ rcu_read_unlock();
return -EBUSY;
+ }
}
+ rcu_read_unlock();
if (mddev->max_disks && rdev->desc_nr >= mddev->max_disks) {
printk(KERN_WARNING "md: %s: array is limited to %d devices\n",
mdname(mddev), mddev->max_disks);
@@ -2118,13 +2082,10 @@ static void md_delayed_delete(struct work_struct *ws)
kobject_put(&rdev->kobj);
}
-static void unbind_rdev_from_array(struct md_rdev * rdev)
+static void unbind_rdev_from_array(struct md_rdev *rdev)
{
char b[BDEVNAME_SIZE];
- if (!rdev->mddev) {
- MD_BUG();
- return;
- }
+
bd_unlink_disk_holder(rdev->bdev, rdev->mddev->gendisk);
list_del_rcu(&rdev->same_set);
printk(KERN_INFO "md: unbind<%s>\n", bdevname(rdev->bdev,b));
@@ -2169,20 +2130,17 @@ static void unlock_rdev(struct md_rdev *rdev)
{
struct block_device *bdev = rdev->bdev;
rdev->bdev = NULL;
- if (!bdev)
- MD_BUG();
blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
}
void md_autodetect_dev(dev_t dev);
-static void export_rdev(struct md_rdev * rdev)
+static void export_rdev(struct md_rdev *rdev)
{
char b[BDEVNAME_SIZE];
+
printk(KERN_INFO "md: export_rdev(%s)\n",
bdevname(rdev->bdev,b));
- if (rdev->mddev)
- MD_BUG();
md_rdev_clear(rdev);
#ifndef MODULE
if (test_bit(AutoDetected, &rdev->flags))
@@ -2192,7 +2150,7 @@ static void export_rdev(struct md_rdev * rdev)
kobject_put(&rdev->kobj);
}
-static void kick_rdev_from_array(struct md_rdev * rdev)
+static void kick_rdev_from_array(struct md_rdev *rdev)
{
unbind_rdev_from_array(rdev);
export_rdev(rdev);
@@ -2200,153 +2158,18 @@ static void kick_rdev_from_array(struct md_rdev * rdev)
static void export_array(struct mddev *mddev)
{
- struct md_rdev *rdev, *tmp;
+ struct md_rdev *rdev;
- rdev_for_each_safe(rdev, tmp, mddev) {
- if (!rdev->mddev) {
- MD_BUG();
- continue;
- }
+ while (!list_empty(&mddev->disks)) {
+ rdev = list_first_entry(&mddev->disks, struct md_rdev,
+ same_set);
kick_rdev_from_array(rdev);
}
- if (!list_empty(&mddev->disks))
- MD_BUG();
mddev->raid_disks = 0;
mddev->major_version = 0;
}
-static void print_desc(mdp_disk_t *desc)
-{
- printk(" DISK<N:%d,(%d,%d),R:%d,S:%d>\n", desc->number,
- desc->major,desc->minor,desc->raid_disk,desc->state);
-}
-
-static void print_sb_90(mdp_super_t *sb)
-{
- int i;
-
- printk(KERN_INFO
- "md: SB: (V:%d.%d.%d) ID:<%08x.%08x.%08x.%08x> CT:%08x\n",
- sb->major_version, sb->minor_version, sb->patch_version,
- sb->set_uuid0, sb->set_uuid1, sb->set_uuid2, sb->set_uuid3,
- sb->ctime);
- printk(KERN_INFO "md: L%d S%08d ND:%d RD:%d md%d LO:%d CS:%d\n",
- sb->level, sb->size, sb->nr_disks, sb->raid_disks,
- sb->md_minor, sb->layout, sb->chunk_size);
- printk(KERN_INFO "md: UT:%08x ST:%d AD:%d WD:%d"
- " FD:%d SD:%d CSUM:%08x E:%08lx\n",
- sb->utime, sb->state, sb->active_disks, sb->working_disks,
- sb->failed_disks, sb->spare_disks,
- sb->sb_csum, (unsigned long)sb->events_lo);
-
- printk(KERN_INFO);
- for (i = 0; i < MD_SB_DISKS; i++) {
- mdp_disk_t *desc;
-
- desc = sb->disks + i;
- if (desc->number || desc->major || desc->minor ||
- desc->raid_disk || (desc->state && (desc->state != 4))) {
- printk(" D %2d: ", i);
- print_desc(desc);
- }
- }
- printk(KERN_INFO "md: THIS: ");
- print_desc(&sb->this_disk);
-}
-
-static void print_sb_1(struct mdp_superblock_1 *sb)
-{
- __u8 *uuid;
-
- uuid = sb->set_uuid;
- printk(KERN_INFO
- "md: SB: (V:%u) (F:0x%08x) Array-ID:<%pU>\n"
- "md: Name: \"%s\" CT:%llu\n",
- le32_to_cpu(sb->major_version),
- le32_to_cpu(sb->feature_map),
- uuid,
- sb->set_name,
- (unsigned long long)le64_to_cpu(sb->ctime)
- & MD_SUPERBLOCK_1_TIME_SEC_MASK);
-
- uuid = sb->device_uuid;
- printk(KERN_INFO
- "md: L%u SZ%llu RD:%u LO:%u CS:%u DO:%llu DS:%llu SO:%llu"
- " RO:%llu\n"
- "md: Dev:%08x UUID: %pU\n"
- "md: (F:0x%08x) UT:%llu Events:%llu ResyncOffset:%llu CSUM:0x%08x\n"
- "md: (MaxDev:%u) \n",
- le32_to_cpu(sb->level),
- (unsigned long long)le64_to_cpu(sb->size),
- le32_to_cpu(sb->raid_disks),
- le32_to_cpu(sb->layout),
- le32_to_cpu(sb->chunksize),
- (unsigned long long)le64_to_cpu(sb->data_offset),
- (unsigned long long)le64_to_cpu(sb->data_size),
- (unsigned long long)le64_to_cpu(sb->super_offset),
- (unsigned long long)le64_to_cpu(sb->recovery_offset),
- le32_to_cpu(sb->dev_number),
- uuid,
- sb->devflags,
- (unsigned long long)le64_to_cpu(sb->utime) & MD_SUPERBLOCK_1_TIME_SEC_MASK,
- (unsigned long long)le64_to_cpu(sb->events),
- (unsigned long long)le64_to_cpu(sb->resync_offset),
- le32_to_cpu(sb->sb_csum),
- le32_to_cpu(sb->max_dev)
- );
-}
-
-static void print_rdev(struct md_rdev *rdev, int major_version)
-{
- char b[BDEVNAME_SIZE];
- printk(KERN_INFO "md: rdev %s, Sect:%08llu F:%d S:%d DN:%u\n",
- bdevname(rdev->bdev, b), (unsigned long long)rdev->sectors,
- test_bit(Faulty, &rdev->flags), test_bit(In_sync, &rdev->flags),
- rdev->desc_nr);
- if (rdev->sb_loaded) {
- printk(KERN_INFO "md: rdev superblock (MJ:%d):\n", major_version);
- switch (major_version) {
- case 0:
- print_sb_90(page_address(rdev->sb_page));
- break;
- case 1:
- print_sb_1(page_address(rdev->sb_page));
- break;
- }
- } else
- printk(KERN_INFO "md: no rdev superblock!\n");
-}
-
-static void md_print_devices(void)
-{
- struct list_head *tmp;
- struct md_rdev *rdev;
- struct mddev *mddev;
- char b[BDEVNAME_SIZE];
-
- printk("\n");
- printk("md: **********************************\n");
- printk("md: * <COMPLETE RAID STATE PRINTOUT> *\n");
- printk("md: **********************************\n");
- for_each_mddev(mddev, tmp) {
-
- if (mddev->bitmap)
- bitmap_print_sb(mddev->bitmap);
- else
- printk("%s: ", mdname(mddev));
- rdev_for_each(rdev, mddev)
- printk("<%s>", bdevname(rdev->bdev,b));
- printk("\n");
-
- rdev_for_each(rdev, mddev)
- print_rdev(rdev, mddev->major_version);
- }
- printk("md: **********************************\n");
- printk("\n");
-}
-
-
-static void sync_sbs(struct mddev * mddev, int nospares)
+static void sync_sbs(struct mddev *mddev, int nospares)
{
/* Update each superblock (in-memory image), but
* if we are allowed to, skip spares which already
@@ -2369,7 +2192,7 @@ static void sync_sbs(struct mddev * mddev, int nospares)
}
}
-static void md_update_sb(struct mddev * mddev, int force_change)
+static void md_update_sb(struct mddev *mddev, int force_change)
{
struct md_rdev *rdev;
int sync_req;
@@ -2390,7 +2213,7 @@ repeat:
mddev->curr_resync_completed > rdev->recovery_offset)
rdev->recovery_offset = mddev->curr_resync_completed;
- }
+ }
if (!mddev->persistent) {
clear_bit(MD_CHANGE_CLEAN, &mddev->flags);
clear_bit(MD_CHANGE_DEVS, &mddev->flags);
@@ -2453,15 +2276,12 @@ repeat:
mddev->can_decrease_events = nospares;
}
- if (!mddev->events) {
- /*
- * oops, this 64-bit counter should never wrap.
- * Either we are in around ~1 trillion A.C., assuming
- * 1 reboot per second, or we have a bug:
- */
- MD_BUG();
- mddev->events --;
- }
+ /*
+ * This 64-bit counter should never wrap.
+ * Either we are in around ~1 trillion A.C., assuming
+ * 1 reboot per second, or we have a bug...
+ */
+ WARN_ON(mddev->events == 0);
rdev_for_each(rdev, mddev) {
if (rdev->badblocks.changed)
@@ -2668,10 +2488,12 @@ state_store(struct md_rdev *rdev, const char *buf, size_t len)
set_bit(In_sync, &rdev->flags);
err = 0;
} else if (cmd_match(buf, "-insync") && rdev->raid_disk >= 0) {
- clear_bit(In_sync, &rdev->flags);
- rdev->saved_raid_disk = rdev->raid_disk;
- rdev->raid_disk = -1;
- err = 0;
+ if (rdev->mddev->pers == NULL) {
+ clear_bit(In_sync, &rdev->flags);
+ rdev->saved_raid_disk = rdev->raid_disk;
+ rdev->raid_disk = -1;
+ err = 0;
+ }
} else if (cmd_match(buf, "write_error")) {
set_bit(WriteErrorSeen, &rdev->flags);
err = 0;
@@ -2829,7 +2651,6 @@ slot_store(struct md_rdev *rdev, const char *buf, size_t len)
return len;
}
-
static struct rdev_sysfs_entry rdev_slot =
__ATTR(slot, S_IRUGO|S_IWUSR, slot_show, slot_store);
@@ -2980,20 +2801,20 @@ rdev_size_store(struct md_rdev *rdev, const char *buf, size_t len)
rdev->sectors = sectors;
if (sectors > oldsectors && my_mddev->external) {
- /* need to check that all other rdevs with the same ->bdev
- * do not overlap. We need to unlock the mddev to avoid
- * a deadlock. We have already changed rdev->sectors, and if
- * we have to change it back, we will have the lock again.
+ /* Need to check that all other rdevs with the same
+ * ->bdev do not overlap. 'rcu' is sufficient to walk
+ * the rdev lists safely.
+ * This check does not provide a hard guarantee, it
+ * just helps avoid dangerous mistakes.
*/
struct mddev *mddev;
int overlap = 0;
struct list_head *tmp;
- mddev_unlock(my_mddev);
+ rcu_read_lock();
for_each_mddev(mddev, tmp) {
struct md_rdev *rdev2;
- mddev_lock_nointr(mddev);
rdev_for_each(rdev2, mddev)
if (rdev->bdev == rdev2->bdev &&
rdev != rdev2 &&
@@ -3003,13 +2824,12 @@ rdev_size_store(struct md_rdev *rdev, const char *buf, size_t len)
overlap = 1;
break;
}
- mddev_unlock(mddev);
if (overlap) {
mddev_put(mddev);
break;
}
}
- mddev_lock_nointr(my_mddev);
+ rcu_read_unlock();
if (overlap) {
/* Someone else could have slipped in a size
* change here, but doing so is just silly.
@@ -3027,7 +2847,6 @@ rdev_size_store(struct md_rdev *rdev, const char *buf, size_t len)
static struct rdev_sysfs_entry rdev_size =
__ATTR(size, S_IRUGO|S_IWUSR, rdev_size_show, rdev_size_store);
-
static ssize_t recovery_start_show(struct md_rdev *rdev, char *page)
{
unsigned long long recovery_start = rdev->recovery_offset;
@@ -3063,7 +2882,6 @@ static ssize_t recovery_start_store(struct md_rdev *rdev, const char *buf, size_
static struct rdev_sysfs_entry rdev_recovery_start =
__ATTR(recovery_start, S_IRUGO|S_IWUSR, recovery_start_show, recovery_start_store);
-
static ssize_t
badblocks_show(struct badblocks *bb, char *page, int unack);
static ssize_t
@@ -3084,7 +2902,6 @@ static ssize_t bb_store(struct md_rdev *rdev, const char *page, size_t len)
static struct rdev_sysfs_entry rdev_bad_blocks =
__ATTR(bad_blocks, S_IRUGO|S_IWUSR, bb_show, bb_store);
-
static ssize_t ubb_show(struct md_rdev *rdev, char *page)
{
return badblocks_show(&rdev->badblocks, page, 1);
@@ -3241,7 +3058,7 @@ static struct md_rdev *md_import_device(dev_t newdev, int super_format, int supe
size = i_size_read(rdev->bdev->bd_inode) >> BLOCK_SIZE_BITS;
if (!size) {
- printk(KERN_WARNING
+ printk(KERN_WARNING
"md: %s has zero or unknown size, marking faulty!\n",
bdevname(rdev->bdev,b));
err = -EINVAL;
@@ -3260,7 +3077,7 @@ static struct md_rdev *md_import_device(dev_t newdev, int super_format, int supe
goto abort_free;
}
if (err < 0) {
- printk(KERN_WARNING
+ printk(KERN_WARNING
"md: could not read %s's sb, not importing!\n",
bdevname(rdev->bdev,b));
goto abort_free;
@@ -3281,8 +3098,7 @@ abort_free:
* Check a full RAID array for plausibility
*/
-
-static void analyze_sbs(struct mddev * mddev)
+static void analyze_sbs(struct mddev *mddev)
{
int i;
struct md_rdev *rdev, *freshest, *tmp;
@@ -3300,12 +3116,11 @@ static void analyze_sbs(struct mddev * mddev)
default:
printk( KERN_ERR \
"md: fatal superblock inconsistency in %s"
- " -- removing from array\n",
+ " -- removing from array\n",
bdevname(rdev->bdev,b));
kick_rdev_from_array(rdev);
}
-
super_types[mddev->major_version].
validate_super(mddev, freshest);
@@ -3344,7 +3159,7 @@ static void analyze_sbs(struct mddev * mddev)
/* Read a fixed-point number.
* Numbers in sysfs attributes should be in "standard" units where
* possible, so time should be in seconds.
- * However we internally use a a much smaller unit such as
+ * However we internally use a a much smaller unit such as
* milliseconds or jiffies.
* This function takes a decimal number with a possible fractional
* component, and produces an integer which is the result of
@@ -3381,7 +3196,6 @@ int strict_strtoul_scaled(const char *cp, unsigned long *res, int scale)
return 0;
}
-
static void md_safemode_timeout(unsigned long data);
static ssize_t
@@ -3524,7 +3338,7 @@ level_store(struct mddev *mddev, const char *buf, size_t len)
/* Looks like we have a winner */
mddev_suspend(mddev);
mddev->pers->stop(mddev);
-
+
if (mddev->pers->sync_request == NULL &&
pers->sync_request != NULL) {
/* need to add the md_redundancy_group */
@@ -3533,7 +3347,7 @@ level_store(struct mddev *mddev, const char *buf, size_t len)
"md: cannot register extra attributes for %s\n",
mdname(mddev));
mddev->sysfs_action = sysfs_get_dirent(mddev->kobj.sd, "sync_action");
- }
+ }
if (mddev->pers->sync_request != NULL &&
pers->sync_request == NULL) {
/* need to remove the md_redundancy_group */
@@ -3611,7 +3425,6 @@ level_store(struct mddev *mddev, const char *buf, size_t len)
static struct md_sysfs_entry md_level =
__ATTR(level, S_IRUGO|S_IWUSR, level_show, level_store);
-
static ssize_t
layout_show(struct mddev *mddev, char *page)
{
@@ -3654,7 +3467,6 @@ layout_store(struct mddev *mddev, const char *buf, size_t len)
static struct md_sysfs_entry md_layout =
__ATTR(layout, S_IRUGO|S_IWUSR, layout_show, layout_store);
-
static ssize_t
raid_disks_show(struct mddev *mddev, char *page)
{
@@ -3859,9 +3671,9 @@ array_state_show(struct mddev *mddev, char *page)
return sprintf(page, "%s\n", array_states[st]);
}
-static int do_md_stop(struct mddev * mddev, int ro, struct block_device *bdev);
-static int md_set_readonly(struct mddev * mddev, struct block_device *bdev);
-static int do_md_run(struct mddev * mddev);
+static int do_md_stop(struct mddev *mddev, int ro, struct block_device *bdev);
+static int md_set_readonly(struct mddev *mddev, struct block_device *bdev);
+static int do_md_run(struct mddev *mddev);
static int restart_array(struct mddev *mddev);
static ssize_t
@@ -4012,7 +3824,6 @@ new_dev_store(struct mddev *mddev, const char *buf, size_t len)
minor != MINOR(dev))
return -EOVERFLOW;
-
if (mddev->persistent) {
rdev = md_import_device(dev, mddev->major_version,
mddev->minor_version);
@@ -4108,7 +3919,6 @@ size_store(struct mddev *mddev, const char *buf, size_t len)
static struct md_sysfs_entry md_size =
__ATTR(component_size, S_IRUGO|S_IWUSR, size_show, size_store);
-
/* Metadata version.
* This is one of
* 'none' for arrays with no metadata (good luck...)
@@ -4490,7 +4300,7 @@ suspend_lo_store(struct mddev *mddev, const char *buf, size_t len)
unsigned long long new = simple_strtoull(buf, &e, 10);
unsigned long long old = mddev->suspend_lo;
- if (mddev->pers == NULL ||
+ if (mddev->pers == NULL ||
mddev->pers->quiesce == NULL)
return -EINVAL;
if (buf == e || (*e && *e != '\n'))
@@ -4510,7 +4320,6 @@ suspend_lo_store(struct mddev *mddev, const char *buf, size_t len)
static struct md_sysfs_entry md_suspend_lo =
__ATTR(suspend_lo, S_IRUGO|S_IWUSR, suspend_lo_show, suspend_lo_store);
-
static ssize_t
suspend_hi_show(struct mddev *mddev, char *page)
{
@@ -4698,7 +4507,6 @@ static struct attribute_group md_redundancy_group = {
.attrs = md_redundancy_attrs,
};
-
static ssize_t
md_attr_show(struct kobject *kobj, struct attribute *attr, char *page)
{
@@ -5111,7 +4919,7 @@ int md_run(struct mddev *mddev)
} else if (mddev->ro == 2) /* auto-readonly not meaningful */
mddev->ro = 0;
- atomic_set(&mddev->writes_pending,0);
+ atomic_set(&mddev->writes_pending,0);
atomic_set(&mddev->max_corr_read_errors,
MD_DEFAULT_MAX_CORRECTED_READ_ERRORS);
mddev->safemode = 0;
@@ -5125,9 +4933,9 @@ int md_run(struct mddev *mddev)
if (rdev->raid_disk >= 0)
if (sysfs_link_rdev(mddev, rdev))
/* failure here is OK */;
-
+
set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
-
+
if (mddev->flags & MD_UPDATE_SB_FLAGS)
md_update_sb(mddev, 0);
@@ -5307,7 +5115,7 @@ static int md_set_readonly(struct mddev *mddev, struct block_device *bdev)
mddev_lock_nointr(mddev);
mutex_lock(&mddev->open_mutex);
- if (atomic_read(&mddev->openers) > !!bdev ||
+ if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) ||
mddev->sync_thread ||
(bdev && !test_bit(MD_STILL_CLOSED, &mddev->flags))) {
printk("md: %s still in use.\n",mdname(mddev));
@@ -5339,7 +5147,7 @@ out:
* 0 - completely stop and dis-assemble array
* 2 - stop but do not disassemble array
*/
-static int do_md_stop(struct mddev * mddev, int mode,
+static int do_md_stop(struct mddev *mddev, int mode,
struct block_device *bdev)
{
struct gendisk *disk = mddev->gendisk;
@@ -5362,7 +5170,7 @@ static int do_md_stop(struct mddev * mddev, int mode,
mddev_lock_nointr(mddev);
mutex_lock(&mddev->open_mutex);
- if (atomic_read(&mddev->openers) > !!bdev ||
+ if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) ||
mddev->sysfs_active ||
mddev->sync_thread ||
(bdev && !test_bit(MD_STILL_CLOSED, &mddev->flags))) {
@@ -5512,12 +5320,12 @@ static void autorun_devices(int part)
"md: cannot allocate memory for md drive.\n");
break;
}
- if (mddev_lock(mddev))
+ if (mddev_lock(mddev))
printk(KERN_WARNING "md: %s locked, cannot run\n",
mdname(mddev));
else if (mddev->raid_disks || mddev->major_version
|| !list_empty(&mddev->disks)) {
- printk(KERN_WARNING
+ printk(KERN_WARNING
"md: %s already running, cannot run %s\n",
mdname(mddev), bdevname(rdev0->bdev,b));
mddev_unlock(mddev);
@@ -5545,7 +5353,7 @@ static void autorun_devices(int part)
}
#endif /* !MODULE */
-static int get_version(void __user * arg)
+static int get_version(void __user *arg)
{
mdu_version_t ver;
@@ -5559,7 +5367,7 @@ static int get_version(void __user * arg)
return 0;
}
-static int get_array_info(struct mddev * mddev, void __user * arg)
+static int get_array_info(struct mddev *mddev, void __user *arg)
{
mdu_array_info_t info;
int nr,working,insync,failed,spare;
@@ -5574,7 +5382,7 @@ static int get_array_info(struct mddev * mddev, void __user * arg)
else {
working++;
if (test_bit(In_sync, &rdev->flags))
- insync++;
+ insync++;
else
spare++;
}
@@ -5614,7 +5422,7 @@ static int get_array_info(struct mddev * mddev, void __user * arg)
return 0;
}
-static int get_bitmap_file(struct mddev * mddev, void __user * arg)
+static int get_bitmap_file(struct mddev *mddev, void __user * arg)
{
mdu_bitmap_file_t *file = NULL; /* too big for stack allocation */
char *ptr, *buf = NULL;
@@ -5652,7 +5460,7 @@ out:
return err;
}
-static int get_disk_info(struct mddev * mddev, void __user * arg)
+static int get_disk_info(struct mddev *mddev, void __user * arg)
{
mdu_disk_info_t info;
struct md_rdev *rdev;
@@ -5688,7 +5496,7 @@ static int get_disk_info(struct mddev * mddev, void __user * arg)
return 0;
}
-static int add_new_disk(struct mddev * mddev, mdu_disk_info_t *info)
+static int add_new_disk(struct mddev *mddev, mdu_disk_info_t *info)
{
char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE];
struct md_rdev *rdev;
@@ -5702,7 +5510,7 @@ static int add_new_disk(struct mddev * mddev, mdu_disk_info_t *info)
/* expecting a device which has a superblock */
rdev = md_import_device(dev, mddev->major_version, mddev->minor_version);
if (IS_ERR(rdev)) {
- printk(KERN_WARNING
+ printk(KERN_WARNING
"md: md_import_device returned %ld\n",
PTR_ERR(rdev));
return PTR_ERR(rdev);
@@ -5714,9 +5522,9 @@ static int add_new_disk(struct mddev * mddev, mdu_disk_info_t *info)
err = super_types[mddev->major_version]
.load_super(rdev, rdev0, mddev->minor_version);
if (err < 0) {
- printk(KERN_WARNING
+ printk(KERN_WARNING
"md: %s has different UUID to %s\n",
- bdevname(rdev->bdev,b),
+ bdevname(rdev->bdev,b),
bdevname(rdev0->bdev,b2));
export_rdev(rdev);
return -EINVAL;
@@ -5736,7 +5544,7 @@ static int add_new_disk(struct mddev * mddev, mdu_disk_info_t *info)
if (mddev->pers) {
int err;
if (!mddev->pers->hot_add_disk) {
- printk(KERN_WARNING
+ printk(KERN_WARNING
"%s: personality does not support diskops!\n",
mdname(mddev));
return -EINVAL;
@@ -5747,7 +5555,7 @@ static int add_new_disk(struct mddev * mddev, mdu_disk_info_t *info)
else
rdev = md_import_device(dev, -1, -1);
if (IS_ERR(rdev)) {
- printk(KERN_WARNING
+ printk(KERN_WARNING
"md: md_import_device returned %ld\n",
PTR_ERR(rdev));
return PTR_ERR(rdev);
@@ -5821,7 +5629,7 @@ static int add_new_disk(struct mddev * mddev, mdu_disk_info_t *info)
int err;
rdev = md_import_device(dev, -1, 0);
if (IS_ERR(rdev)) {
- printk(KERN_WARNING
+ printk(KERN_WARNING
"md: error, md_import_device() returned %ld\n",
PTR_ERR(rdev));
return PTR_ERR(rdev);
@@ -5856,7 +5664,7 @@ static int add_new_disk(struct mddev * mddev, mdu_disk_info_t *info)
return 0;
}
-static int hot_remove_disk(struct mddev * mddev, dev_t dev)
+static int hot_remove_disk(struct mddev *mddev, dev_t dev)
{
char b[BDEVNAME_SIZE];
struct md_rdev *rdev;
@@ -5882,7 +5690,7 @@ busy:
return -EBUSY;
}
-static int hot_add_disk(struct mddev * mddev, dev_t dev)
+static int hot_add_disk(struct mddev *mddev, dev_t dev)
{
char b[BDEVNAME_SIZE];
int err;
@@ -5898,7 +5706,7 @@ static int hot_add_disk(struct mddev * mddev, dev_t dev)
return -EINVAL;
}
if (!mddev->pers->hot_add_disk) {
- printk(KERN_WARNING
+ printk(KERN_WARNING
"%s: personality does not support diskops!\n",
mdname(mddev));
return -EINVAL;
@@ -5906,7 +5714,7 @@ static int hot_add_disk(struct mddev * mddev, dev_t dev)
rdev = md_import_device(dev, -1, 0);
if (IS_ERR(rdev)) {
- printk(KERN_WARNING
+ printk(KERN_WARNING
"md: error, md_import_device() returned %ld\n",
PTR_ERR(rdev));
return -EINVAL;
@@ -5920,7 +5728,7 @@ static int hot_add_disk(struct mddev * mddev, dev_t dev)
rdev->sectors = rdev->sb_start;
if (test_bit(Faulty, &rdev->flags)) {
- printk(KERN_WARNING
+ printk(KERN_WARNING
"md: can not hot-add faulty %s disk to %s!\n",
bdevname(rdev->bdev,b), mdname(mddev));
err = -EINVAL;
@@ -5968,7 +5776,6 @@ static int set_bitmap_file(struct mddev *mddev, int fd)
/* we should be able to change the bitmap.. */
}
-
if (fd >= 0) {
struct inode *inode;
if (mddev->bitmap)
@@ -6039,7 +5846,7 @@ static int set_bitmap_file(struct mddev *mddev, int fd)
* The minor and patch _version numbers are also kept incase the
* super_block handler wishes to interpret them.
*/
-static int set_array_info(struct mddev * mddev, mdu_array_info_t *info)
+static int set_array_info(struct mddev *mddev, mdu_array_info_t *info)
{
if (info->raid_disks == 0) {
@@ -6048,7 +5855,7 @@ static int set_array_info(struct mddev * mddev, mdu_array_info_t *info)
info->major_version >= ARRAY_SIZE(super_types) ||
super_types[info->major_version].name == NULL) {
/* maybe try to auto-load a module? */
- printk(KERN_INFO
+ printk(KERN_INFO
"md: superblock version %d not known\n",
info->major_version);
return -EINVAL;
@@ -6196,7 +6003,6 @@ static int update_raid_disks(struct mddev *mddev, int raid_disks)
return rv;
}
-
/*
* update_array_info is used to change the configuration of an
* on-line array.
@@ -6347,7 +6153,6 @@ static inline bool md_ioctl_valid(unsigned int cmd)
case GET_DISK_INFO:
case HOT_ADD_DISK:
case HOT_REMOVE_DISK:
- case PRINT_RAID_DEBUG:
case RAID_AUTORUN:
case RAID_VERSION:
case RESTART_ARRAY_RW:
@@ -6391,18 +6196,13 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode,
switch (cmd) {
case RAID_VERSION:
err = get_version(argp);
- goto done;
-
- case PRINT_RAID_DEBUG:
- err = 0;
- md_print_devices();
- goto done;
+ goto out;
#ifndef MODULE
case RAID_AUTORUN:
err = 0;
autostart_arrays(arg);
- goto done;
+ goto out;
#endif
default:;
}
@@ -6415,7 +6215,7 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode,
if (!mddev) {
BUG();
- goto abort;
+ goto out;
}
/* Some actions do not requires the mutex */
@@ -6425,18 +6225,18 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode,
err = -ENODEV;
else
err = get_array_info(mddev, argp);
- goto abort;
+ goto out;
case GET_DISK_INFO:
if (!mddev->raid_disks && !mddev->external)
err = -ENODEV;
else
err = get_disk_info(mddev, argp);
- goto abort;
+ goto out;
case SET_DISK_FAULTY:
err = set_disk_faulty(mddev, new_decode_dev(arg));
- goto abort;
+ goto out;
}
if (cmd == ADD_NEW_DISK)
@@ -6454,10 +6254,10 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode,
* and writes
*/
mutex_lock(&mddev->open_mutex);
- if (atomic_read(&mddev->openers) > 1) {
+ if (mddev->pers && atomic_read(&mddev->openers) > 1) {
mutex_unlock(&mddev->open_mutex);
err = -EBUSY;
- goto abort;
+ goto out;
}
set_bit(MD_STILL_CLOSED, &mddev->flags);
mutex_unlock(&mddev->open_mutex);
@@ -6465,10 +6265,10 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode,
}
err = mddev_lock(mddev);
if (err) {
- printk(KERN_INFO
+ printk(KERN_INFO
"md: ioctl lock interrupted, reason %d, cmd %d\n",
err, cmd);
- goto abort;
+ goto out;
}
if (cmd == SET_ARRAY_INFO) {
@@ -6477,38 +6277,38 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode,
memset(&info, 0, sizeof(info));
else if (copy_from_user(&info, argp, sizeof(info))) {
err = -EFAULT;
- goto abort_unlock;
+ goto unlock;
}
if (mddev->pers) {
err = update_array_info(mddev, &info);
if (err) {
printk(KERN_WARNING "md: couldn't update"
" array info. %d\n", err);
- goto abort_unlock;
+ goto unlock;
}
- goto done_unlock;
+ goto unlock;
}
if (!list_empty(&mddev->disks)) {
printk(KERN_WARNING
"md: array %s already has disks!\n",
mdname(mddev));
err = -EBUSY;
- goto abort_unlock;
+ goto unlock;
}
if (mddev->raid_disks) {
printk(KERN_WARNING
"md: array %s already initialised!\n",
mdname(mddev));
err = -EBUSY;
- goto abort_unlock;
+ goto unlock;
}
err = set_array_info(mddev, &info);
if (err) {
printk(KERN_WARNING "md: couldn't set"
" array info. %d\n", err);
- goto abort_unlock;
+ goto unlock;
}
- goto done_unlock;
+ goto unlock;
}
/*
@@ -6521,7 +6321,7 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode,
&& cmd != RUN_ARRAY && cmd != SET_BITMAP_FILE
&& cmd != GET_BITMAP_FILE) {
err = -ENODEV;
- goto abort_unlock;
+ goto unlock;
}
/*
@@ -6530,23 +6330,23 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode,
switch (cmd) {
case GET_BITMAP_FILE:
err = get_bitmap_file(mddev, argp);
- goto done_unlock;
+ goto unlock;
case RESTART_ARRAY_RW:
err = restart_array(mddev);
- goto done_unlock;
+ goto unlock;
case STOP_ARRAY:
err = do_md_stop(mddev, 0, bdev);
- goto done_unlock;
+ goto unlock;
case STOP_ARRAY_RO:
err = md_set_readonly(mddev, bdev);
- goto done_unlock;
+ goto unlock;
case HOT_REMOVE_DISK:
err = hot_remove_disk(mddev, new_decode_dev(arg));
- goto done_unlock;
+ goto unlock;
case ADD_NEW_DISK:
/* We can support ADD_NEW_DISK on read-only arrays
@@ -6562,14 +6362,14 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode,
break;
else
err = add_new_disk(mddev, &info);
- goto done_unlock;
+ goto unlock;
}
break;
case BLKROSET:
if (get_user(ro, (int __user *)(arg))) {
err = -EFAULT;
- goto done_unlock;
+ goto unlock;
}
err = -EINVAL;
@@ -6577,11 +6377,11 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode,
* does not matter, no writes are coming
*/
if (ro)
- goto done_unlock;
+ goto unlock;
/* are we are already prepared for writes? */
if (mddev->ro != 1)
- goto done_unlock;
+ goto unlock;
/* transitioning to readauto need only happen for
* arrays that call md_write_start
@@ -6593,17 +6393,14 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode,
set_disk_ro(mddev->gendisk, 0);
}
}
- goto done_unlock;
+ goto unlock;
}
/*
* The remaining ioctls are changing the state of the
* superblock, so we do not allow them on read-only arrays.
- * However non-MD ioctls (e.g. get-size) will still come through
- * here and hit the 'default' below, so only disallow
- * 'md' ioctls, and switch to rw mode if started auto-readonly.
*/
- if (_IOC_TYPE(cmd) == MD_MAJOR && mddev->ro && mddev->pers) {
+ if (mddev->ro && mddev->pers) {
if (mddev->ro == 2) {
mddev->ro = 0;
sysfs_notify_dirent_safe(mddev->sysfs_state);
@@ -6621,7 +6418,7 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode,
}
} else {
err = -EROFS;
- goto abort_unlock;
+ goto unlock;
}
}
@@ -6633,38 +6430,32 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode,
err = -EFAULT;
else
err = add_new_disk(mddev, &info);
- goto done_unlock;
+ goto unlock;
}
case HOT_ADD_DISK:
err = hot_add_disk(mddev, new_decode_dev(arg));
- goto done_unlock;
+ goto unlock;
case RUN_ARRAY:
err = do_md_run(mddev);
- goto done_unlock;
+ goto unlock;
case SET_BITMAP_FILE:
err = set_bitmap_file(mddev, (int)arg);
- goto done_unlock;
+ goto unlock;
default:
err = -EINVAL;
- goto abort_unlock;
+ goto unlock;
}
-done_unlock:
-abort_unlock:
+unlock:
if (mddev->hold_active == UNTIL_IOCTL &&
err != -EINVAL)
mddev->hold_active = 0;
mddev_unlock(mddev);
-
- return err;
-done:
- if (err)
- MD_BUG();
-abort:
+out:
return err;
}
#ifdef CONFIG_COMPAT
@@ -6726,7 +6517,7 @@ static int md_open(struct block_device *bdev, fmode_t mode)
static void md_release(struct gendisk *disk, fmode_t mode)
{
- struct mddev *mddev = disk->private_data;
+ struct mddev *mddev = disk->private_data;
BUG_ON(!mddev);
atomic_dec(&mddev->openers);
@@ -6761,7 +6552,7 @@ static const struct block_device_operations md_fops =
.revalidate_disk= md_revalidate,
};
-static int md_thread(void * arg)
+static int md_thread(void *arg)
{
struct md_thread *thread = arg;
@@ -6810,6 +6601,7 @@ void md_wakeup_thread(struct md_thread *thread)
wake_up(&thread->wqueue);
}
}
+EXPORT_SYMBOL(md_wakeup_thread);
struct md_thread *md_register_thread(void (*run) (struct md_thread *),
struct mddev *mddev, const char *name)
@@ -6835,6 +6627,7 @@ struct md_thread *md_register_thread(void (*run) (struct md_thread *),
}
return thread;
}
+EXPORT_SYMBOL(md_register_thread);
void md_unregister_thread(struct md_thread **threadp)
{
@@ -6852,14 +6645,10 @@ void md_unregister_thread(struct md_thread **threadp)
kthread_stop(thread->tsk);
kfree(thread);
}
+EXPORT_SYMBOL(md_unregister_thread);
void md_error(struct mddev *mddev, struct md_rdev *rdev)
{
- if (!mddev) {
- MD_BUG();
- return;
- }
-
if (!rdev || test_bit(Faulty, &rdev->flags))
return;
@@ -6876,6 +6665,7 @@ void md_error(struct mddev *mddev, struct md_rdev *rdev)
queue_work(md_misc_wq, &mddev->event_work);
md_new_event_inintr(mddev);
}
+EXPORT_SYMBOL(md_error);
/* seq_file implementation /proc/mdstat */
@@ -6898,8 +6688,7 @@ static void status_unused(struct seq_file *seq)
seq_printf(seq, "\n");
}
-
-static void status_resync(struct seq_file *seq, struct mddev * mddev)
+static void status_resync(struct seq_file *seq, struct mddev *mddev)
{
sector_t max_sectors, resync, res;
unsigned long dt, db;
@@ -6919,13 +6708,7 @@ static void status_resync(struct seq_file *seq, struct mddev * mddev)
else
max_sectors = mddev->dev_sectors;
- /*
- * Should not happen.
- */
- if (!max_sectors) {
- MD_BUG();
- return;
- }
+ WARN_ON(max_sectors == 0);
/* Pick 'scale' such that (resync>>scale)*1000 will fit
* in a sector_t, and (max_sectors>>scale) will fit in a
* u32, as those are the requirements for sector_div.
@@ -7021,7 +6804,7 @@ static void *md_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
struct list_head *tmp;
struct mddev *next_mddev, *mddev = v;
-
+
++*pos;
if (v == (void*)2)
return NULL;
@@ -7036,7 +6819,7 @@ static void *md_seq_next(struct seq_file *seq, void *v, loff_t *pos)
else {
next_mddev = (void*)2;
*pos = 0x10000;
- }
+ }
spin_unlock(&all_mddevs_lock);
if (v != (void*)1)
@@ -7132,7 +6915,7 @@ static int md_seq_show(struct seq_file *seq, void *v)
if (mddev->pers) {
mddev->pers->status(seq, mddev);
- seq_printf(seq, "\n ");
+ seq_printf(seq, "\n ");
if (mddev->pers->sync_request) {
if (mddev->curr_resync > 2) {
status_resync(seq, mddev);
@@ -7150,7 +6933,7 @@ static int md_seq_show(struct seq_file *seq, void *v)
seq_printf(seq, "\n");
}
mddev_unlock(mddev);
-
+
return 0;
}
@@ -7204,12 +6987,14 @@ static const struct file_operations md_seq_fops = {
int register_md_personality(struct md_personality *p)
{
+ printk(KERN_INFO "md: %s personality registered for level %d\n",
+ p->name, p->level);
spin_lock(&pers_lock);
list_add_tail(&p->list, &pers_list);
- printk(KERN_INFO "md: %s personality registered for level %d\n", p->name, p->level);
spin_unlock(&pers_lock);
return 0;
}
+EXPORT_SYMBOL(register_md_personality);
int unregister_md_personality(struct md_personality *p)
{
@@ -7219,10 +7004,11 @@ int unregister_md_personality(struct md_personality *p)
spin_unlock(&pers_lock);
return 0;
}
+EXPORT_SYMBOL(unregister_md_personality);
static int is_mddev_idle(struct mddev *mddev, int init)
{
- struct md_rdev * rdev;
+ struct md_rdev *rdev;
int idle;
int curr_events;
@@ -7276,7 +7062,7 @@ void md_done_sync(struct mddev *mddev, int blocks, int ok)
// stop recovery, signal do_sync ....
}
}
-
+EXPORT_SYMBOL(md_done_sync);
/* md_write_start(mddev, bi)
* If we need to update some array metadata (e.g. 'active' flag
@@ -7317,6 +7103,7 @@ void md_write_start(struct mddev *mddev, struct bio *bi)
wait_event(mddev->sb_wait,
!test_bit(MD_CHANGE_PENDING, &mddev->flags));
}
+EXPORT_SYMBOL(md_write_start);
void md_write_end(struct mddev *mddev)
{
@@ -7327,6 +7114,7 @@ void md_write_end(struct mddev *mddev)
mod_timer(&mddev->safemode_timer, jiffies + mddev->safemode_delay);
}
}
+EXPORT_SYMBOL(md_write_end);
/* md_allow_write(mddev)
* Calling this ensures that the array is marked 'active' so that writes
@@ -7784,6 +7572,33 @@ no_add:
return spares;
}
+static void md_start_sync(struct work_struct *ws)
+{
+ struct mddev *mddev = container_of(ws, struct mddev, del_work);
+
+ mddev->sync_thread = md_register_thread(md_do_sync,
+ mddev,
+ "resync");
+ if (!mddev->sync_thread) {
+ printk(KERN_ERR "%s: could not start resync"
+ " thread...\n",
+ mdname(mddev));
+ /* leave the spares where they are, it shouldn't hurt */
+ clear_bit(MD_RECOVERY_SYNC, &mddev->recovery);
+ clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery);
+ clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery);
+ clear_bit(MD_RECOVERY_CHECK, &mddev->recovery);
+ clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery);
+ if (test_and_clear_bit(MD_RECOVERY_RECOVER,
+ &mddev->recovery))
+ if (mddev->sysfs_action)
+ sysfs_notify_dirent_safe(mddev->sysfs_action);
+ } else
+ md_wakeup_thread(mddev->sync_thread);
+ sysfs_notify_dirent_safe(mddev->sysfs_action);
+ md_new_event(mddev);
+}
+
/*
* This routine is regularly called by all per-raid-array threads to
* deal with generic issues like resync and super-block update.
@@ -7900,7 +7715,7 @@ void md_check_recovery(struct mddev *mddev)
if (!test_and_clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery) ||
test_bit(MD_RECOVERY_FROZEN, &mddev->recovery))
- goto unlock;
+ goto not_running;
/* no recovery is running.
* remove any failed drives, then
* add spares if possible.
@@ -7912,7 +7727,7 @@ void md_check_recovery(struct mddev *mddev)
if (mddev->pers->check_reshape == NULL ||
mddev->pers->check_reshape(mddev) != 0)
/* Cannot proceed */
- goto unlock;
+ goto not_running;
set_bit(MD_RECOVERY_RESHAPE, &mddev->recovery);
clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery);
} else if ((spares = remove_and_add_spares(mddev, NULL))) {
@@ -7925,7 +7740,7 @@ void md_check_recovery(struct mddev *mddev)
clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery);
} else if (!test_bit(MD_RECOVERY_SYNC, &mddev->recovery))
/* nothing to be done ... */
- goto unlock;
+ goto not_running;
if (mddev->pers->sync_request) {
if (spares) {
@@ -7935,27 +7750,11 @@ void md_check_recovery(struct mddev *mddev)
*/
bitmap_write_all(mddev->bitmap);
}
- mddev->sync_thread = md_register_thread(md_do_sync,
- mddev,
- "resync");
- if (!mddev->sync_thread) {
- printk(KERN_ERR "%s: could not start resync"
- " thread...\n",
- mdname(mddev));
- /* leave the spares where they are, it shouldn't hurt */
- clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery);
- clear_bit(MD_RECOVERY_SYNC, &mddev->recovery);
- clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery);
- clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery);
- clear_bit(MD_RECOVERY_CHECK, &mddev->recovery);
- } else
- md_wakeup_thread(mddev->sync_thread);
- sysfs_notify_dirent_safe(mddev->sysfs_action);
- md_new_event(mddev);
+ INIT_WORK(&mddev->del_work, md_start_sync);
+ queue_work(md_misc_wq, &mddev->del_work);
+ goto unlock;
}
- unlock:
- wake_up(&mddev->sb_wait);
-
+ not_running:
if (!mddev->sync_thread) {
clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery);
if (test_and_clear_bit(MD_RECOVERY_RECOVER,
@@ -7963,9 +7762,12 @@ void md_check_recovery(struct mddev *mddev)
if (mddev->sysfs_action)
sysfs_notify_dirent_safe(mddev->sysfs_action);
}
+ unlock:
+ wake_up(&mddev->sb_wait);
mddev_unlock(mddev);
}
}
+EXPORT_SYMBOL(md_check_recovery);
void md_reap_sync_thread(struct mddev *mddev)
{
@@ -8008,6 +7810,7 @@ void md_reap_sync_thread(struct mddev *mddev)
if (mddev->event_work.func)
queue_work(md_misc_wq, &mddev->event_work);
}
+EXPORT_SYMBOL(md_reap_sync_thread);
void md_wait_for_blocked_rdev(struct md_rdev *rdev, struct mddev *mddev)
{
@@ -8641,7 +8444,6 @@ void md_autodetect_dev(dev_t dev)
}
}
-
static void autostart_arrays(int part)
{
struct md_rdev *rdev;
@@ -8665,10 +8467,9 @@ static void autostart_arrays(int part)
if (IS_ERR(rdev))
continue;
- if (test_bit(Faulty, &rdev->flags)) {
- MD_BUG();
+ if (test_bit(Faulty, &rdev->flags))
continue;
- }
+
set_bit(AutoDetected, &rdev->flags);
list_add(&rdev->same_set, &pending_raid_disks);
i_passed++;
@@ -8736,20 +8537,8 @@ static int set_ro(const char *val, struct kernel_param *kp)
module_param_call(start_ro, set_ro, get_ro, NULL, S_IRUSR|S_IWUSR);
module_param(start_dirty_degraded, int, S_IRUGO|S_IWUSR);
-
module_param_call(new_array, add_named_array, NULL, NULL, S_IWUSR);
-EXPORT_SYMBOL(register_md_personality);
-EXPORT_SYMBOL(unregister_md_personality);
-EXPORT_SYMBOL(md_error);
-EXPORT_SYMBOL(md_done_sync);
-EXPORT_SYMBOL(md_write_start);
-EXPORT_SYMBOL(md_write_end);
-EXPORT_SYMBOL(md_register_thread);
-EXPORT_SYMBOL(md_unregister_thread);
-EXPORT_SYMBOL(md_wakeup_thread);
-EXPORT_SYMBOL(md_check_recovery);
-EXPORT_SYMBOL(md_reap_sync_thread);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("MD RAID framework");
MODULE_ALIAS("md");
diff --git a/drivers/md/md.h b/drivers/md/md.h
index a49d991f3fe1..03cec5bdcaae 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -1,15 +1,15 @@
/*
md.h : kernel internal structure of the Linux MD driver
Copyright (C) 1996-98 Ingo Molnar, Gadi Oxman
-
+
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
-
+
You should have received a copy of the GNU General Public License
(for example /usr/src/linux/COPYING); if not, write to the Free
- Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef _MD_MD_H
@@ -56,7 +56,7 @@ struct md_rdev {
__u64 sb_events;
sector_t data_offset; /* start of data in array */
sector_t new_data_offset;/* only relevant while reshaping */
- sector_t sb_start; /* offset of the super block (in 512byte sectors) */
+ sector_t sb_start; /* offset of the super block (in 512byte sectors) */
int sb_size; /* bytes in the superblock */
int preferred_minor; /* autorun support */
@@ -239,7 +239,7 @@ struct mddev {
minor_version,
patch_version;
int persistent;
- int external; /* metadata is
+ int external; /* metadata is
* managed externally */
char metadata_type[17]; /* externally set*/
int chunk_sectors;
@@ -248,7 +248,7 @@ struct mddev {
char clevel[16];
int raid_disks;
int max_disks;
- sector_t dev_sectors; /* used size of
+ sector_t dev_sectors; /* used size of
* component devices */
sector_t array_sectors; /* exported array size */
int external_size; /* size managed
@@ -312,7 +312,7 @@ struct mddev {
int parallel_resync;
int ok_start_degraded;
- /* recovery/resync flags
+ /* recovery/resync flags
* NEEDED: we might need to start a resync/recover
* RUNNING: a thread is running, or about to be started
* SYNC: actually doing a resync, not a recovery
@@ -392,20 +392,20 @@ struct mddev {
unsigned int safemode; /* if set, update "clean" superblock
* when no writes pending.
- */
+ */
unsigned int safemode_delay;
struct timer_list safemode_timer;
- atomic_t writes_pending;
+ atomic_t writes_pending;
struct request_queue *queue; /* for plugging ... */
- struct bitmap *bitmap; /* the bitmap for the device */
+ struct bitmap *bitmap; /* the bitmap for the device */
struct {
struct file *file; /* the bitmap file */
loff_t offset; /* offset from superblock of
* start of bitmap. May be
* negative, but not '0'
* For external metadata, offset
- * from start of device.
+ * from start of device.
*/
unsigned long space; /* space available at this offset */
loff_t default_offset; /* this is the offset to use when
@@ -421,7 +421,7 @@ struct mddev {
int external;
} bitmap_info;
- atomic_t max_corr_read_errors; /* max read retries */
+ atomic_t max_corr_read_errors; /* max read retries */
struct list_head all_mddevs;
struct attribute_group *to_remove;
@@ -439,7 +439,6 @@ struct mddev {
void (*sync_super)(struct mddev *mddev, struct md_rdev *rdev);
};
-
static inline void rdev_dec_pending(struct md_rdev *rdev, struct mddev *mddev)
{
int faulty = test_bit(Faulty, &rdev->flags);
@@ -449,7 +448,7 @@ static inline void rdev_dec_pending(struct md_rdev *rdev, struct mddev *mddev)
static inline void md_sync_acct(struct block_device *bdev, unsigned long nr_sectors)
{
- atomic_add(nr_sectors, &bdev->bd_contains->bd_disk->sync_io);
+ atomic_add(nr_sectors, &bdev->bd_contains->bd_disk->sync_io);
}
struct md_personality
@@ -463,7 +462,7 @@ struct md_personality
int (*stop)(struct mddev *mddev);
void (*status)(struct seq_file *seq, struct mddev *mddev);
/* error_handler must set ->faulty and clear ->in_sync
- * if appropriate, and should abort recovery if needed
+ * if appropriate, and should abort recovery if needed
*/
void (*error_handler)(struct mddev *mddev, struct md_rdev *rdev);
int (*hot_add_disk) (struct mddev *mddev, struct md_rdev *rdev);
@@ -493,7 +492,6 @@ struct md_personality
void *(*takeover) (struct mddev *mddev);
};
-
struct md_sysfs_entry {
struct attribute attr;
ssize_t (*show)(struct mddev *, char *);
@@ -560,7 +558,7 @@ struct md_thread {
void (*run) (struct md_thread *thread);
struct mddev *mddev;
wait_queue_head_t wqueue;
- unsigned long flags;
+ unsigned long flags;
struct task_struct *tsk;
unsigned long timeout;
void *private;
@@ -594,7 +592,7 @@ extern void md_flush_request(struct mddev *mddev, struct bio *bio);
extern void md_super_write(struct mddev *mddev, struct md_rdev *rdev,
sector_t sector, int size, struct page *page);
extern void md_super_wait(struct mddev *mddev);
-extern int sync_page_io(struct md_rdev *rdev, sector_t sector, int size,
+extern int sync_page_io(struct md_rdev *rdev, sector_t sector, int size,
struct page *page, int rw, bool metadata_op);
extern void md_do_sync(struct md_thread *thread);
extern void md_new_event(struct mddev *mddev);
diff --git a/drivers/md/multipath.c b/drivers/md/multipath.c
index 849ad39f547b..399272f9c042 100644
--- a/drivers/md/multipath.c
+++ b/drivers/md/multipath.c
@@ -31,13 +31,12 @@
#define NR_RESERVED_BUFS 32
-
static int multipath_map (struct mpconf *conf)
{
int i, disks = conf->raid_disks;
/*
- * Later we do read balancing on the read side
+ * Later we do read balancing on the read side
* now we use the first available disk.
*/
@@ -68,7 +67,6 @@ static void multipath_reschedule_retry (struct multipath_bh *mp_bh)
md_wakeup_thread(mddev->thread);
}
-
/*
* multipath_end_bh_io() is called when we have finished servicing a multipathed
* operation and are ready to return a success/failure code to the buffer
@@ -98,8 +96,8 @@ static void multipath_end_request(struct bio *bio, int error)
*/
char b[BDEVNAME_SIZE];
md_error (mp_bh->mddev, rdev);
- printk(KERN_ERR "multipath: %s: rescheduling sector %llu\n",
- bdevname(rdev->bdev,b),
+ printk(KERN_ERR "multipath: %s: rescheduling sector %llu\n",
+ bdevname(rdev->bdev,b),
(unsigned long long)bio->bi_iter.bi_sector);
multipath_reschedule_retry(mp_bh);
} else
@@ -145,12 +143,12 @@ static void multipath_status (struct seq_file *seq, struct mddev *mddev)
{
struct mpconf *conf = mddev->private;
int i;
-
+
seq_printf (seq, " [%d/%d] [", conf->raid_disks,
conf->raid_disks - mddev->degraded);
for (i = 0; i < conf->raid_disks; i++)
seq_printf (seq, "%s",
- conf->multipaths[i].rdev &&
+ conf->multipaths[i].rdev &&
test_bit(In_sync, &conf->multipaths[i].rdev->flags) ? "U" : "_");
seq_printf (seq, "]");
}
@@ -195,7 +193,7 @@ static void multipath_error (struct mddev *mddev, struct md_rdev *rdev)
* first check if this is a queued request for a device
* which has just failed.
*/
- printk(KERN_ALERT
+ printk(KERN_ALERT
"multipath: only one IO path left and IO error.\n");
/* leave it active... it's all we have */
return;
@@ -242,7 +240,6 @@ static void print_multipath_conf (struct mpconf *conf)
}
}
-
static int multipath_add_disk(struct mddev *mddev, struct md_rdev *rdev)
{
struct mpconf *conf = mddev->private;
@@ -325,8 +322,6 @@ abort:
return err;
}
-
-
/*
* This is a kernel thread which:
*
@@ -356,7 +351,7 @@ static void multipathd(struct md_thread *thread)
bio = &mp_bh->bio;
bio->bi_iter.bi_sector = mp_bh->master_bio->bi_iter.bi_sector;
-
+
if ((mp_bh->path = multipath_map (conf))<0) {
printk(KERN_ALERT "multipath: %s: unrecoverable IO read"
" error for block %llu\n",
@@ -414,7 +409,7 @@ static int multipath_run (struct mddev *mddev)
conf = kzalloc(sizeof(struct mpconf), GFP_KERNEL);
mddev->private = conf;
if (!conf) {
- printk(KERN_ERR
+ printk(KERN_ERR
"multipath: couldn't allocate memory for %s\n",
mdname(mddev));
goto out;
@@ -423,7 +418,7 @@ static int multipath_run (struct mddev *mddev)
conf->multipaths = kzalloc(sizeof(struct multipath_info)*mddev->raid_disks,
GFP_KERNEL);
if (!conf->multipaths) {
- printk(KERN_ERR
+ printk(KERN_ERR
"multipath: couldn't allocate memory for %s\n",
mdname(mddev));
goto out_free_conf;
@@ -469,7 +464,7 @@ static int multipath_run (struct mddev *mddev)
conf->pool = mempool_create_kmalloc_pool(NR_RESERVED_BUFS,
sizeof(struct multipath_bh));
if (conf->pool == NULL) {
- printk(KERN_ERR
+ printk(KERN_ERR
"multipath: couldn't allocate memory for %s\n",
mdname(mddev));
goto out_free_conf;
@@ -485,7 +480,7 @@ static int multipath_run (struct mddev *mddev)
}
}
- printk(KERN_INFO
+ printk(KERN_INFO
"multipath: array %s active with %d out of %d IO paths\n",
mdname(mddev), conf->raid_disks - mddev->degraded,
mddev->raid_disks);
@@ -512,7 +507,6 @@ out:
return -EIO;
}
-
static int multipath_stop (struct mddev *mddev)
{
struct mpconf *conf = mddev->private;
diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index cf91f5910c7c..ba6b85de96d2 100644
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -1,10 +1,9 @@
/*
raid0.c : Multiple Devices driver for Linux
- Copyright (C) 1994-96 Marc ZYNGIER
+ Copyright (C) 1994-96 Marc ZYNGIER
<zyngier@ufr-info-p7.ibp.fr> or
<maz@gloups.fdn.fr>
- Copyright (C) 1999, 2000 Ingo Molnar, Red Hat
-
+ Copyright (C) 1999, 2000 Ingo Molnar, Red Hat
RAID-0 management functions.
@@ -12,10 +11,10 @@
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
-
+
You should have received a copy of the GNU General Public License
(for example /usr/src/linux/COPYING); if not, write to the Free
- Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/blkdev.h>
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 55de4f6f7eaf..40b35be34f8d 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -494,7 +494,6 @@ static void raid1_end_write_request(struct bio *bio, int error)
bio_put(to_put);
}
-
/*
* This routine returns the disk from which the requested read should
* be done. There is a per-array 'next expected sequential IO' sector
@@ -901,18 +900,18 @@ static sector_t wait_barrier(struct r1conf *conf, struct bio *bio)
* However if there are already pending
* requests (preventing the barrier from
* rising completely), and the
- * pre-process bio queue isn't empty,
+ * per-process bio queue isn't empty,
* then don't wait, as we need to empty
- * that queue to get the nr_pending
- * count down.
+ * that queue to allow conf->start_next_window
+ * to increase.
*/
wait_event_lock_irq(conf->wait_barrier,
!conf->array_frozen &&
(!conf->barrier ||
- ((conf->start_next_window <
- conf->next_resync + RESYNC_SECTORS) &&
- current->bio_list &&
- !bio_list_empty(current->bio_list))),
+ ((conf->start_next_window <
+ conf->next_resync + RESYNC_SECTORS) &&
+ current->bio_list &&
+ !bio_list_empty(current->bio_list))),
conf->resync_lock);
conf->nr_waiting--;
}
@@ -1001,8 +1000,7 @@ static void unfreeze_array(struct r1conf *conf)
spin_unlock_irq(&conf->resync_lock);
}
-
-/* duplicate the data pages for behind I/O
+/* duplicate the data pages for behind I/O
*/
static void alloc_behind_pages(struct bio *bio, struct r1bio *r1_bio)
{
@@ -1471,7 +1469,6 @@ static void status(struct seq_file *seq, struct mddev *mddev)
seq_printf(seq, "]");
}
-
static void error(struct mddev *mddev, struct md_rdev *rdev)
{
char b[BDEVNAME_SIZE];
@@ -1565,7 +1562,7 @@ static int raid1_spare_active(struct mddev *mddev)
unsigned long flags;
/*
- * Find all failed disks within the RAID1 configuration
+ * Find all failed disks within the RAID1 configuration
* and mark them readable.
* Called under mddev lock, so rcu protection not needed.
*/
@@ -1606,7 +1603,6 @@ static int raid1_spare_active(struct mddev *mddev)
return count;
}
-
static int raid1_add_disk(struct mddev *mddev, struct md_rdev *rdev)
{
struct r1conf *conf = mddev->private;
@@ -1735,7 +1731,6 @@ abort:
return err;
}
-
static void end_sync_read(struct bio *bio, int error)
{
struct r1bio *r1_bio = bio->bi_private;
@@ -1947,7 +1942,7 @@ static int fix_sync_read_error(struct r1bio *r1_bio)
return 1;
}
-static int process_checks(struct r1bio *r1_bio)
+static void process_checks(struct r1bio *r1_bio)
{
/* We have read all readable devices. If we haven't
* got the block, then there is no hope left.
@@ -2039,7 +2034,6 @@ static int process_checks(struct r1bio *r1_bio)
bio_copy_data(sbio, pbio);
}
- return 0;
}
static void sync_request_write(struct mddev *mddev, struct r1bio *r1_bio)
@@ -2057,8 +2051,8 @@ static void sync_request_write(struct mddev *mddev, struct r1bio *r1_bio)
return;
if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery))
- if (process_checks(r1_bio) < 0)
- return;
+ process_checks(r1_bio);
+
/*
* schedule writes
*/
@@ -2458,7 +2452,6 @@ static void raid1d(struct md_thread *thread)
blk_finish_plug(&plug);
}
-
static int init_resync(struct r1conf *conf)
{
int buffs;
@@ -2722,7 +2715,7 @@ static sector_t sync_request(struct mddev *mddev, sector_t sector_nr, int *skipp
/* remove last page from this bio */
bio->bi_vcnt--;
bio->bi_iter.bi_size -= len;
- bio->bi_flags &= ~(1<< BIO_SEG_VALID);
+ __clear_bit(BIO_SEG_VALID, &bio->bi_flags);
}
goto bio_full;
}
@@ -2947,9 +2940,9 @@ static int run(struct mddev *mddev)
printk(KERN_NOTICE "md/raid1:%s: not clean"
" -- starting background reconstruction\n",
mdname(mddev));
- printk(KERN_INFO
+ printk(KERN_INFO
"md/raid1:%s: active with %d out of %d mirrors\n",
- mdname(mddev), mddev->raid_disks - mddev->degraded,
+ mdname(mddev), mddev->raid_disks - mddev->degraded,
mddev->raid_disks);
/*
diff --git a/drivers/md/raid1.h b/drivers/md/raid1.h
index 9bebca7bff2f..33bda55ef9f7 100644
--- a/drivers/md/raid1.h
+++ b/drivers/md/raid1.h
@@ -90,7 +90,6 @@ struct r1conf {
*/
int recovery_disabled;
-
/* poolinfo contains information about the content of the
* mempools - it changes when the array grows or shrinks
*/
@@ -103,7 +102,6 @@ struct r1conf {
*/
struct page *tmppage;
-
/* When taking over an array from a different personality, we store
* the new thread here until we fully activate the array.
*/
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 6703751d87d7..32e282f4c83c 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -366,7 +366,6 @@ static void raid10_end_read_request(struct bio *bio, int error)
struct md_rdev *rdev;
struct r10conf *conf = r10_bio->mddev->private;
-
slot = r10_bio->read_slot;
dev = r10_bio->devs[slot].devnum;
rdev = r10_bio->devs[slot].rdev;
@@ -1559,7 +1558,6 @@ static void make_request(struct mddev *mddev, struct bio *bio)
md_write_start(mddev, bio);
-
do {
/*
@@ -1782,7 +1780,6 @@ static int raid10_spare_active(struct mddev *mddev)
return count;
}
-
static int raid10_add_disk(struct mddev *mddev, struct md_rdev *rdev)
{
struct r10conf *conf = mddev->private;
@@ -1929,7 +1926,6 @@ abort:
return err;
}
-
static void end_sync_read(struct bio *bio, int error)
{
struct r10bio *r10_bio = bio->bi_private;
@@ -2295,7 +2291,6 @@ static void recovery_request_write(struct mddev *mddev, struct r10bio *r10_bio)
}
}
-
/*
* Used by fix_read_error() to decay the per rdev read_errors.
* We halve the read error count for every hour that has elapsed
@@ -2852,7 +2847,6 @@ static void raid10d(struct md_thread *thread)
blk_finish_plug(&plug);
}
-
static int init_resync(struct r10conf *conf)
{
int buffs;
@@ -3388,7 +3382,7 @@ static sector_t sync_request(struct mddev *mddev, sector_t sector_nr,
/* remove last page from this bio */
bio2->bi_vcnt--;
bio2->bi_iter.bi_size -= len;
- bio2->bi_flags &= ~(1<< BIO_SEG_VALID);
+ __clear_bit(BIO_SEG_VALID, &bio2->bi_flags);
}
goto bio_full;
}
@@ -3776,7 +3770,6 @@ static int run(struct mddev *mddev)
blk_queue_merge_bvec(mddev->queue, raid10_mergeable_bvec);
}
-
if (md_integrity_register(mddev))
goto out_free_conf;
@@ -3834,6 +3827,8 @@ static int stop(struct mddev *mddev)
mempool_destroy(conf->r10bio_pool);
safe_put_page(conf->tmppage);
kfree(conf->mirrors);
+ kfree(conf->mirrors_old);
+ kfree(conf->mirrors_new);
kfree(conf);
mddev->private = NULL;
return 0;
@@ -4121,7 +4116,7 @@ static int raid10_start_reshape(struct mddev *mddev)
memcpy(conf->mirrors_new, conf->mirrors,
sizeof(struct raid10_info)*conf->prev.raid_disks);
smp_mb();
- kfree(conf->mirrors_old); /* FIXME and elsewhere */
+ kfree(conf->mirrors_old);
conf->mirrors_old = conf->mirrors;
conf->mirrors = conf->mirrors_new;
conf->mirrors_new = NULL;
@@ -4416,7 +4411,7 @@ read_more:
read_bio->bi_end_io = end_sync_read;
read_bio->bi_rw = READ;
read_bio->bi_flags &= (~0UL << BIO_RESET_BITS);
- read_bio->bi_flags |= 1 << BIO_UPTODATE;
+ __set_bit(BIO_UPTODATE, &read_bio->bi_flags);
read_bio->bi_vcnt = 0;
read_bio->bi_iter.bi_size = 0;
r10_bio->master_bio = read_bio;
@@ -4473,7 +4468,7 @@ read_more:
/* Remove last page from this bio */
bio2->bi_vcnt--;
bio2->bi_iter.bi_size -= len;
- bio2->bi_flags &= ~(1<<BIO_SEG_VALID);
+ __clear_bit(BIO_SEG_VALID, &bio2->bi_flags);
}
goto bio_full;
}
@@ -4575,7 +4570,6 @@ static void end_reshape(struct r10conf *conf)
conf->fullsync = 0;
}
-
static int handle_reshape_read_error(struct mddev *mddev,
struct r10bio *r10_bio)
{
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 9f0fbecd1eb5..9c66e5997fc8 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -463,7 +463,6 @@ static inline void insert_hash(struct r5conf *conf, struct stripe_head *sh)
hlist_add_head(&sh->hash, hp);
}
-
/* find an idle stripe, make sure it is unhashed, and return it. */
static struct stripe_head *get_free_stripe(struct r5conf *conf, int hash)
{
@@ -531,9 +530,7 @@ static void init_stripe(struct stripe_head *sh, sector_t sector, int previous)
BUG_ON(stripe_operations_active(sh));
pr_debug("init_stripe called, stripe %llu\n",
- (unsigned long long)sh->sector);
-
- remove_hash(sh);
+ (unsigned long long)sector);
retry:
seq = read_seqcount_begin(&conf->gen_lock);
sh->generation = conf->generation - previous;
@@ -542,7 +539,6 @@ retry:
stripe_set_idx(sector, conf, previous, sh);
sh->state = 0;
-
for (i = sh->disks; i--; ) {
struct r5dev *dev = &sh->dev[i];
@@ -1350,7 +1346,6 @@ ops_run_compute6_2(struct stripe_head *sh, struct raid5_percpu *percpu)
}
}
-
static void ops_complete_prexor(void *stripe_head_ref)
{
struct stripe_head *sh = stripe_head_ref;
@@ -2419,7 +2414,6 @@ static sector_t raid5_compute_sector(struct r5conf *conf, sector_t r_sector,
return new_sector;
}
-
static sector_t compute_blocknr(struct stripe_head *sh, int i, int previous)
{
struct r5conf *conf = sh->raid_conf;
@@ -2437,7 +2431,6 @@ static sector_t compute_blocknr(struct stripe_head *sh, int i, int previous)
sector_t r_sector;
struct stripe_head sh2;
-
chunk_offset = sector_div(new_sector, sectors_per_chunk);
stripe = new_sector;
@@ -2541,7 +2534,6 @@ static sector_t compute_blocknr(struct stripe_head *sh, int i, int previous)
return r_sector;
}
-
static void
schedule_reconstruction(struct stripe_head *sh, struct stripe_head_state *s,
int rcw, int expand)
@@ -3013,7 +3005,6 @@ static void handle_stripe_fill(struct stripe_head *sh,
set_bit(STRIPE_HANDLE, &sh->state);
}
-
/* handle_stripe_clean_event
* any written block on an uptodate or failed drive can be returned.
* Note that if we 'wrote' to a failed drive, it will be UPTODATE, but
@@ -3304,7 +3295,6 @@ static void handle_parity_checks5(struct r5conf *conf, struct stripe_head *sh,
}
}
-
static void handle_parity_checks6(struct r5conf *conf, struct stripe_head *sh,
struct stripe_head_state *s,
int disks)
@@ -3939,7 +3929,6 @@ static void handle_stripe(struct stripe_head *sh)
}
}
-
/* Finish reconstruct operations initiated by the expansion process */
if (sh->reconstruct_state == reconstruct_state_result) {
struct stripe_head *sh_src
@@ -4137,7 +4126,6 @@ static int raid5_mergeable_bvec(struct request_queue *q,
return max;
}
-
static int in_chunk_boundary(struct mddev *mddev, struct bio *bio)
{
sector_t sector = bio->bi_iter.bi_sector + get_start_sect(bio->bi_bdev);
@@ -4167,7 +4155,6 @@ static void add_bio_to_retry(struct bio *bi,struct r5conf *conf)
md_wakeup_thread(conf->mddev->thread);
}
-
static struct bio *remove_bio_from_retry(struct r5conf *conf)
{
struct bio *bi;
@@ -4191,7 +4178,6 @@ static struct bio *remove_bio_from_retry(struct r5conf *conf)
return bi;
}
-
/*
* The "raid5_align_endio" should check if the read succeeded and if it
* did, call bio_endio on the original bio (having bio_put the new bio
@@ -4224,7 +4210,6 @@ static void raid5_align_endio(struct bio *bi, int error)
return;
}
-
pr_debug("raid5_align_endio : io error...handing IO for a retry\n");
add_bio_to_retry(raid_bi, conf);
@@ -4249,7 +4234,6 @@ static int bio_fits_rdev(struct bio *bi)
return 1;
}
-
static int chunk_aligned_read(struct mddev *mddev, struct bio * raid_bio)
{
struct r5conf *conf = mddev->private;
@@ -4301,7 +4285,7 @@ static int chunk_aligned_read(struct mddev *mddev, struct bio * raid_bio)
rcu_read_unlock();
raid_bio->bi_next = (void*)rdev;
align_bi->bi_bdev = rdev->bdev;
- align_bi->bi_flags &= ~(1 << BIO_SEG_VALID);
+ __clear_bit(BIO_SEG_VALID, &align_bi->bi_flags);
if (!bio_fits_rdev(align_bi) ||
is_badblock(rdev, align_bi->bi_iter.bi_sector,
@@ -5446,7 +5430,6 @@ raid5_skip_copy = __ATTR(skip_copy, S_IRUGO | S_IWUSR,
raid5_show_skip_copy,
raid5_store_skip_copy);
-
static ssize_t
stripe_cache_active_show(struct mddev *mddev, char *page)
{
@@ -5898,7 +5881,6 @@ static struct r5conf *setup_conf(struct mddev *mddev)
return ERR_PTR(-ENOMEM);
}
-
static int only_parity(int raid_disk, int algo, int raid_disks, int max_degraded)
{
switch (algo) {
@@ -5911,7 +5893,7 @@ static int only_parity(int raid_disk, int algo, int raid_disks, int max_degraded
return 1;
break;
case ALGORITHM_PARITY_0_6:
- if (raid_disk == 0 ||
+ if (raid_disk == 0 ||
raid_disk == raid_disks - 1)
return 1;
break;
@@ -6165,7 +6147,6 @@ static int run(struct mddev *mddev)
"reshape");
}
-
/* Ok, everything is just fine now */
if (mddev->to_remove == &raid5_attrs_group)
mddev->to_remove = NULL;
@@ -6814,7 +6795,6 @@ static void raid5_quiesce(struct mddev *mddev, int state)
}
}
-
static void *raid45_takeover_raid0(struct mddev *mddev, int level)
{
struct r0conf *raid0_conf = mddev->private;
@@ -6841,7 +6821,6 @@ static void *raid45_takeover_raid0(struct mddev *mddev, int level)
return setup_conf(mddev);
}
-
static void *raid5_takeover_raid1(struct mddev *mddev)
{
int chunksect;
@@ -6902,7 +6881,6 @@ static void *raid5_takeover_raid6(struct mddev *mddev)
return setup_conf(mddev);
}
-
static int raid5_check_reshape(struct mddev *mddev)
{
/* For a 2-drive array, the layout and chunk size can be changed
@@ -7051,7 +7029,6 @@ static void *raid6_takeover(struct mddev *mddev)
return setup_conf(mddev);
}
-
static struct md_personality raid6_personality =
{
.name = "raid6",
diff --git a/drivers/md/raid5.h b/drivers/md/raid5.h
index bc72cd4be5f8..d59f5ca743cd 100644
--- a/drivers/md/raid5.h
+++ b/drivers/md/raid5.h
@@ -155,7 +155,7 @@
*/
/*
- * Operations state - intermediate states that are visible outside of
+ * Operations state - intermediate states that are visible outside of
* STRIPE_ACTIVE.
* In general _idle indicates nothing is running, _run indicates a data
* processing operation is active, and _result means the data processing result
@@ -364,7 +364,6 @@ enum {
* HANDLE gets cleared if stripe_handle leaves nothing locked.
*/
-
struct disk_info {
struct md_rdev *rdev, *replacement;
};
@@ -528,7 +527,6 @@ struct r5conf {
#define ALGORITHM_ROTATING_N_RESTART 9 /* DDF PRL=6 RLQ=2 */
#define ALGORITHM_ROTATING_N_CONTINUE 10 /*DDF PRL=6 RLQ=3 */
-
/* For every RAID5 algorithm we define a RAID6 algorithm
* with exactly the same layout for data and parity, and
* with the Q block always on the last device (N-1).
generated by cgit v1.2.3-70-g09d2 (git 2.47.1) at 2024-12-25 03:06:56 +0000