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btrfs: cleanup device states define BTRFS_DEV_STATE_MISSING

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Currently device state is being managed by each individual int
variable such as struct btrfs_device::missing. Instead of that
declare btrfs_device::dev_state BTRFS_DEV_STATE_MISSING and use
the bit operations.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by : Nikolay Borisov <nborisov@suse.com>
[ whitespace adjustments ]
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Anand Jain 2017-12-04 12:54:54 +08:00 committed by David Sterba
parent e12c96214d
commit e6e674bd4d
6 changed files with 28 additions and 21 deletions
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2
fs/btrfs/dev-replace.c
View File

@ -306,7 +306,7 @@ void btrfs_after_dev_replace_commit(struct btrfs_fs_info *fs_info)
static char* btrfs_dev_name(struct btrfs_device *device)
{
if (device->missing)
if (test_bit(BTRFS_DEV_STATE_MISSING, &device->dev_state))
return "<missing disk>";
else
return rcu_str_deref(device->name);

4
fs/btrfs/disk-io.c
View File

@ -3389,7 +3389,7 @@ static int barrier_all_devices(struct btrfs_fs_info *info)
/* send down all the barriers */
head = &info->fs_devices->devices;
list_for_each_entry(dev, head, dev_list) {
if (dev->missing)
if (test_bit(BTRFS_DEV_STATE_MISSING, &dev->dev_state))
continue;
if (!dev->bdev)
continue;
@ -3403,7 +3403,7 @@ static int barrier_all_devices(struct btrfs_fs_info *info)
/* wait for all the barriers */
list_for_each_entry(dev, head, dev_list) {
if (dev->missing)
if (test_bit(BTRFS_DEV_STATE_MISSING, &dev->dev_state))
continue;
if (!dev->bdev) {
errors_wait++;

7
fs/btrfs/scrub.c
View File

@ -2535,7 +2535,7 @@ leave_nomem:
}
WARN_ON(sblock->page_count == 0);
if (dev->missing) {
if (test_bit(BTRFS_DEV_STATE_MISSING, &dev->dev_state)) {
/*
* This case should only be hit for RAID 5/6 device replace. See
* the comment in scrub_missing_raid56_pages() for details.
@ -2870,7 +2870,7 @@ static int scrub_extent_for_parity(struct scrub_parity *sparity,
u8 csum[BTRFS_CSUM_SIZE];
u32 blocksize;
if (dev->missing) {
if (test_bit(BTRFS_DEV_STATE_MISSING, &dev->dev_state)) {
scrub_parity_mark_sectors_error(sparity, logical, len);
return 0;
}
@ -4112,7 +4112,8 @@ int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
mutex_lock(&fs_info->fs_devices->device_list_mutex);
dev = btrfs_find_device(fs_info, devid, NULL, NULL);
if (!dev || (dev->missing && !is_dev_replace)) {
if (!dev || (test_bit(BTRFS_DEV_STATE_MISSING, &dev->dev_state) &&
!is_dev_replace)) {
mutex_unlock(&fs_info->fs_devices->device_list_mutex);
return -ENODEV;
}

2
fs/btrfs/super.c
View File

@ -2270,7 +2270,7 @@ static int btrfs_show_devname(struct seq_file *m, struct dentry *root)
while (cur_devices) {
head = &cur_devices->devices;
list_for_each_entry(dev, head, dev_list) {
if (dev->missing)
if (test_bit(BTRFS_DEV_STATE_MISSING, &dev->dev_state))
continue;
if (!dev->name)
continue;

32
fs/btrfs/volumes.c
View File

@ -825,9 +825,9 @@ static noinline int device_list_add(const char *path,
return -ENOMEM;
rcu_string_free(device->name);
rcu_assign_pointer(device->name, name);
if (device->missing) {
if (test_bit(BTRFS_DEV_STATE_MISSING, &device->dev_state)) {
fs_devices->missing_devices--;
device->missing = 0;
clear_bit(BTRFS_DEV_STATE_MISSING, &device->dev_state);
}
}
@ -996,7 +996,7 @@ static void btrfs_prepare_close_one_device(struct btrfs_device *device)
fs_devices->rw_devices--;
}
if (device->missing)
if (test_bit(BTRFS_DEV_STATE_MISSING, &device->dev_state))
fs_devices->missing_devices--;
new_device = btrfs_alloc_device(NULL, &device->devid,
@ -1882,7 +1882,8 @@ static struct btrfs_device * btrfs_find_next_active_device(
list_for_each_entry(next_device, &fs_devs->devices, dev_list) {
if (next_device != device &&
!next_device->missing && next_device->bdev)
!test_bit(BTRFS_DEV_STATE_MISSING, &next_device->dev_state)
&& next_device->bdev)
return next_device;
}
@ -1996,7 +1997,7 @@ int btrfs_rm_device(struct btrfs_fs_info *fs_info, const char *device_path,
device->fs_devices->num_devices--;
device->fs_devices->total_devices--;
if (device->missing)
if (test_bit(BTRFS_DEV_STATE_MISSING, &device->dev_state))
device->fs_devices->missing_devices--;
btrfs_assign_next_active_device(fs_info, device, NULL);
@ -2071,7 +2072,7 @@ void btrfs_rm_dev_replace_remove_srcdev(struct btrfs_fs_info *fs_info,
list_del_rcu(&srcdev->dev_list);
list_del(&srcdev->dev_alloc_list);
fs_devices->num_devices--;
if (srcdev->missing)
if (test_bit(BTRFS_DEV_STATE_MISSING, &srcdev->dev_state))
fs_devices->missing_devices--;
if (test_bit(BTRFS_DEV_STATE_WRITEABLE, &srcdev->dev_state))
@ -5089,7 +5090,8 @@ int btrfs_chunk_readonly(struct btrfs_fs_info *fs_info, u64 chunk_offset)
map = em->map_lookup;
for (i = 0; i < map->num_stripes; i++) {
if (map->stripes[i].dev->missing) {
if (test_bit(BTRFS_DEV_STATE_MISSING,
&map->stripes[i].dev->dev_state)) {
miss_ndevs++;
continue;
}
@ -6117,7 +6119,8 @@ static noinline void btrfs_schedule_bio(struct btrfs_device *device,
int should_queue = 1;
struct btrfs_pending_bios *pending_bios;
if (device->missing || !device->bdev) {
if (test_bit(BTRFS_DEV_STATE_MISSING, &device->dev_state) ||
!device->bdev) {
bio_io_error(bio);
return;
}
@ -6313,7 +6316,7 @@ static struct btrfs_device *add_missing_dev(struct btrfs_fs_devices *fs_devices,
device->fs_devices = fs_devices;
fs_devices->num_devices++;
device->missing = 1;
set_bit(BTRFS_DEV_STATE_MISSING, &device->dev_state);
fs_devices->missing_devices++;
return device;
@ -6675,7 +6678,8 @@ static int read_one_dev(struct btrfs_fs_info *fs_info,
dev_uuid, false);
}
if(!device->bdev && !device->missing) {
if (!device->bdev &&
!test_bit(BTRFS_DEV_STATE_MISSING, &device->dev_state)) {
/*
* this happens when a device that was properly setup
* in the device info lists suddenly goes bad.
@ -6683,12 +6687,13 @@ static int read_one_dev(struct btrfs_fs_info *fs_info,
* device->missing to one here
*/
device->fs_devices->missing_devices++;
device->missing = 1;
set_bit(BTRFS_DEV_STATE_MISSING, &device->dev_state);
}
/* Move the device to its own fs_devices */
if (device->fs_devices != fs_devices) {
ASSERT(device->missing);
ASSERT(test_bit(BTRFS_DEV_STATE_MISSING,
&device->dev_state));
list_move(&device->dev_list, &fs_devices->devices);
device->fs_devices->num_devices--;
@ -6874,7 +6879,8 @@ bool btrfs_check_rw_degradable(struct btrfs_fs_info *fs_info)
for (i = 0; i < map->num_stripes; i++) {
struct btrfs_device *dev = map->stripes[i].dev;
if (!dev || !dev->bdev || dev->missing ||
if (!dev || !dev->bdev ||
test_bit(BTRFS_DEV_STATE_MISSING, &dev->dev_state) ||
dev->last_flush_error)
missing++;
}

2
fs/btrfs/volumes.h
View File

@ -49,6 +49,7 @@ struct btrfs_pending_bios {
#define BTRFS_DEV_STATE_WRITEABLE (0)
#define BTRFS_DEV_STATE_IN_FS_METADATA (1)
#define BTRFS_DEV_STATE_MISSING (2)
struct btrfs_device {
struct list_head dev_list;
@ -73,7 +74,6 @@ struct btrfs_device {
fmode_t mode;
unsigned long dev_state;
int missing;
int is_tgtdev_for_dev_replace;
blk_status_t last_flush_error;
int flush_bio_sent;