Currently device state is being managed by each individual int
variable such as struct btrfs_device::writeable. Instead of that
declare device state BTRFS_DEV_STATE_WRITEABLE and use the
bit operations.
Signed-off-by: Anand Jain <anand.j...@oracle.com>
---
v2: Remove a unrelated change.
Start btrfs_device::dev_state position from bit 0.
fs/btrfs/disk-io.c | 12 ++++++----
fs/btrfs/extent-tree.c | 2 +-
fs/btrfs/extent_io.c | 3 ++-
fs/btrfs/ioctl.c | 2 +-
fs/btrfs/scrub.c | 3 ++-
fs/btrfs/volumes.c | 60 +++++++++++++++++++++++++++++---------------------
fs/btrfs/volumes.h | 4 +++-
7 files changed, 52 insertions(+), 34 deletions(-)
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 10a2a579cc7f..56198cb02b35 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -3403,7 +3403,8 @@ static int barrier_all_devices(struct btrfs_fs_info *info)
continue;
if (!dev->bdev)
continue;
- if (!dev->in_fs_metadata || !dev->writeable)
+ if (!dev->in_fs_metadata ||
+ !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state))
continue;
write_dev_flush(dev);
@@ -3418,7 +3419,8 @@ static int barrier_all_devices(struct btrfs_fs_info *info)
errors_wait++;
continue;
}
- if (!dev->in_fs_metadata || !dev->writeable)
+ if (!dev->in_fs_metadata ||
+ !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state))
continue;
ret = wait_dev_flush(dev);
@@ -3515,7 +3517,8 @@ int write_all_supers(struct btrfs_fs_info *fs_info, int
max_mirrors)
total_errors++;
continue;
}
- if (!dev->in_fs_metadata || !dev->writeable)
+ if (!dev->in_fs_metadata ||
+ !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state))
continue;
btrfs_set_stack_device_generation(dev_item, 0);
@@ -3554,7 +3557,8 @@ int write_all_supers(struct btrfs_fs_info *fs_info, int
max_mirrors)
list_for_each_entry_rcu(dev, head, dev_list) {
if (!dev->bdev)
continue;
- if (!dev->in_fs_metadata || !dev->writeable)
+ if (!dev->in_fs_metadata ||
+ !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state))
continue;
ret = wait_dev_supers(dev, max_mirrors);
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 15c01014e5e1..2cd323d184a0 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -10877,7 +10877,7 @@ static int btrfs_trim_free_extents(struct btrfs_device
*device,
*trimmed = 0;
/* Not writeable = nothing to do. */
- if (!device->writeable)
+ if (!test_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state))
return 0;
/* No free space = nothing to do. */
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 012d63870b99..25682c5a0dd5 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2027,7 +2027,8 @@ int repair_io_failure(struct btrfs_fs_info *fs_info, u64
ino, u64 start,
bio->bi_iter.bi_sector = sector;
dev = bbio->stripes[bbio->mirror_num - 1].dev;
btrfs_put_bbio(bbio);
- if (!dev || !dev->bdev || !dev->writeable) {
+ if (!dev || !dev->bdev ||
+ !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state)) {
btrfs_bio_counter_dec(fs_info);
bio_put(bio);
return -EIO;
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index d748ad1c3620..e59004a17166 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -1503,7 +1503,7 @@ static noinline int btrfs_ioctl_resize(struct file *file,
goto out_free;
}
- if (!device->writeable) {
+ if (!test_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state)) {
btrfs_info(fs_info,
"resizer unable to apply on readonly device %llu",
devid);
diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c
index b2f871d80982..fa70ff9b7762 100644
--- a/fs/btrfs/scrub.c
+++ b/fs/btrfs/scrub.c
@@ -4117,7 +4117,8 @@ int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64
devid, u64 start,
return -ENODEV;
}
- if (!is_dev_replace && !readonly && !dev->writeable) {
+ if (!is_dev_replace && !readonly &&
+ !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state)) {
mutex_unlock(&fs_info->fs_devices->device_list_mutex);
rcu_read_lock();
name = rcu_dereference(dev->name);
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index c19a49167966..9d14d83ab8dc 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -620,10 +620,15 @@ static int btrfs_open_one_device(struct btrfs_fs_devices
*fs_devices,
device->generation = btrfs_super_generation(disk_super);
if (btrfs_super_flags(disk_super) & BTRFS_SUPER_FLAG_SEEDING) {
- device->writeable = 0;
+ clear_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state);
fs_devices->seeding = 1;
} else {
- device->writeable = !bdev_read_only(bdev);
+ if (bdev_read_only(bdev))
+ clear_bit(BTRFS_DEV_STATE_WRITEABLE,
+ &device->dev_state);
+ else
+ set_bit(BTRFS_DEV_STATE_WRITEABLE,
+ &device->dev_state);
}
q = bdev_get_queue(bdev);
@@ -635,7 +640,7 @@ static int btrfs_open_one_device(struct btrfs_fs_devices
*fs_devices,
device->mode = flags;
fs_devices->open_devices++;
- if (device->writeable &&
+ if (test_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state) &&
device->devid != BTRFS_DEV_REPLACE_DEVID) {
fs_devices->rw_devices++;
list_add(&device->dev_alloc_list,
@@ -867,9 +872,10 @@ void btrfs_close_extra_devices(struct btrfs_fs_devices
*fs_devices, int step)
device->bdev = NULL;
fs_devices->open_devices--;
}
- if (device->writeable) {
+ if (test_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state)) {
list_del_init(&device->dev_alloc_list);
- device->writeable = 0;
+ clear_bit(BTRFS_DEV_STATE_WRITEABLE,
+ &device->dev_state);
if (!device->is_tgtdev_for_dev_replace)
fs_devices->rw_devices--;
}
@@ -912,7 +918,8 @@ static void free_device(struct rcu_head *head)
static void btrfs_close_bdev(struct btrfs_device *device)
{
- if (device->bdev && device->writeable) {
+ if (device->bdev &&
+ test_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state)) {
sync_blockdev(device->bdev);
invalidate_bdev(device->bdev);
}
@@ -930,7 +937,7 @@ static void btrfs_prepare_close_one_device(struct
btrfs_device *device)
if (device->bdev)
fs_devices->open_devices--;
- if (device->writeable &&
+ if (test_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state) &&
device->devid != BTRFS_DEV_REPLACE_DEVID) {
list_del_init(&device->dev_alloc_list);
fs_devices->rw_devices--;
@@ -1893,12 +1900,13 @@ int btrfs_rm_device(struct btrfs_fs_info *fs_info,
const char *device_path,
goto out;
}
- if (device->writeable && fs_info->fs_devices->rw_devices == 1) {
+ if (test_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state) &&
+ fs_info->fs_devices->rw_devices == 1) {
ret = BTRFS_ERROR_DEV_ONLY_WRITABLE;
goto out;
}
- if (device->writeable) {
+ if (test_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state)) {
mutex_lock(&fs_info->chunk_mutex);
list_del_init(&device->dev_alloc_list);
device->fs_devices->rw_devices--;
@@ -1960,7 +1968,7 @@ int btrfs_rm_device(struct btrfs_fs_info *fs_info, const
char *device_path,
* the devices list. All that's left is to zero out the old
* supers and free the device.
*/
- if (device->writeable)
+ if (test_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state))
btrfs_scratch_superblocks(device->bdev, device->name->str);
btrfs_close_bdev(device);
@@ -1986,7 +1994,7 @@ int btrfs_rm_device(struct btrfs_fs_info *fs_info, const
char *device_path,
return ret;
error_undo:
- if (device->writeable) {
+ if (test_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state)) {
mutex_lock(&fs_info->chunk_mutex);
list_add(&device->dev_alloc_list,
&fs_info->fs_devices->alloc_list);
@@ -2017,7 +2025,7 @@ void btrfs_rm_dev_replace_remove_srcdev(struct
btrfs_fs_info *fs_info,
if (srcdev->missing)
fs_devices->missing_devices--;
- if (srcdev->writeable)
+ if (test_bit(BTRFS_DEV_STATE_WRITEABLE, &srcdev->dev_state))
fs_devices->rw_devices--;
if (srcdev->bdev)
@@ -2029,7 +2037,7 @@ void btrfs_rm_dev_replace_free_srcdev(struct
btrfs_fs_info *fs_info,
{
struct btrfs_fs_devices *fs_devices = srcdev->fs_devices;
- if (srcdev->writeable) {
+ if (test_bit(BTRFS_DEV_STATE_WRITEABLE, &srcdev->dev_state)) {
/* zero out the old super if it is writable */
btrfs_scratch_superblocks(srcdev->bdev, srcdev->name->str);
}
@@ -2385,7 +2393,7 @@ int btrfs_init_new_device(struct btrfs_fs_info *fs_info,
const char *device_path
}
q = bdev_get_queue(bdev);
- device->writeable = 1;
+ set_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state);
device->generation = trans->transid;
device->io_width = fs_info->sectorsize;
device->io_align = fs_info->sectorsize;
@@ -2594,7 +2602,7 @@ int btrfs_init_dev_replace_tgtdev(struct btrfs_fs_info
*fs_info,
rcu_assign_pointer(device->name, name);
mutex_lock(&fs_info->fs_devices->device_list_mutex);
- device->writeable = 1;
+ set_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state);
device->generation = 0;
device->io_width = fs_info->sectorsize;
device->io_align = fs_info->sectorsize;
@@ -2694,7 +2702,7 @@ int btrfs_grow_device(struct btrfs_trans_handle *trans,
u64 old_total;
u64 diff;
- if (!device->writeable)
+ if (!test_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state))
return -EACCES;
new_size = round_down(new_size, fs_info->sectorsize);
@@ -3514,7 +3522,7 @@ static int __btrfs_balance(struct btrfs_fs_info *fs_info)
old_size = btrfs_device_get_total_bytes(device);
size_to_free = div_factor(old_size, 1);
size_to_free = min_t(u64, size_to_free, SZ_1M);
- if (!device->writeable ||
+ if (!test_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state) ||
btrfs_device_get_total_bytes(device) -
btrfs_device_get_bytes_used(device) > size_to_free ||
device->is_tgtdev_for_dev_replace)
@@ -4397,7 +4405,7 @@ int btrfs_shrink_device(struct btrfs_device *device, u64
new_size)
mutex_lock(&fs_info->chunk_mutex);
btrfs_device_set_total_bytes(device, new_size);
- if (device->writeable) {
+ if (test_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state)) {
device->fs_devices->total_rw_bytes -= diff;
atomic64_sub(diff, &fs_info->free_chunk_space);
}
@@ -4522,7 +4530,7 @@ int btrfs_shrink_device(struct btrfs_device *device, u64
new_size)
if (ret) {
mutex_lock(&fs_info->chunk_mutex);
btrfs_device_set_total_bytes(device, old_size);
- if (device->writeable)
+ if (test_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state))
device->fs_devices->total_rw_bytes += diff;
atomic64_add(diff, &fs_info->free_chunk_space);
mutex_unlock(&fs_info->chunk_mutex);
@@ -4682,7 +4690,7 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle
*trans,
u64 max_avail;
u64 dev_offset;
- if (!device->writeable) {
+ if (!test_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state)) {
WARN(1, KERN_ERR
"BTRFS: read-only device in alloc_list\n");
continue;
@@ -5041,8 +5049,8 @@ int btrfs_chunk_readonly(struct btrfs_fs_info *fs_info,
u64 chunk_offset)
miss_ndevs++;
continue;
}
-
- if (!map->stripes[i].dev->writeable) {
+ if (!test_bit(BTRFS_DEV_STATE_WRITEABLE,
+ &map->stripes[i].dev->dev_state)) {
readonly = 1;
goto end;
}
@@ -6211,7 +6219,8 @@ blk_status_t btrfs_map_bio(struct btrfs_fs_info *fs_info,
struct bio *bio,
for (dev_nr = 0; dev_nr < total_devs; dev_nr++) {
dev = bbio->stripes[dev_nr].dev;
if (!dev || !dev->bdev ||
- (bio_op(first_bio) == REQ_OP_WRITE && !dev->writeable)) {
+ (bio_op(first_bio) == REQ_OP_WRITE &&
+ !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state))) {
bbio_error(bbio, first_bio, logical);
continue;
}
@@ -6648,7 +6657,7 @@ static int read_one_dev(struct btrfs_fs_info *fs_info,
}
if (device->fs_devices != fs_info->fs_devices) {
- BUG_ON(device->writeable);
+ BUG_ON(test_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state));
if (device->generation !=
btrfs_device_generation(leaf, dev_item))
return -EINVAL;
@@ -6656,7 +6665,8 @@ static int read_one_dev(struct btrfs_fs_info *fs_info,
fill_device_from_item(leaf, dev_item, device);
device->in_fs_metadata = 1;
- if (device->writeable && !device->is_tgtdev_for_dev_replace) {
+ if (test_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state) &&
+ !device->is_tgtdev_for_dev_replace) {
device->fs_devices->total_rw_bytes += device->total_bytes;
atomic64_add(device->total_bytes - device->bytes_used,
&fs_info->free_chunk_space);
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index bbb5db6be7f8..b6d1b1f90b73 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -47,6 +47,8 @@ struct btrfs_pending_bios {
#define btrfs_device_data_ordered_init(device) do { } while (0)
#endif
+#define BTRFS_DEV_STATE_WRITEABLE (1UL << 0)
+
struct btrfs_device {
struct list_head dev_list;
struct list_head dev_alloc_list;
@@ -69,7 +71,7 @@ struct btrfs_device {
/* the mode sent to blkdev_get */
fmode_t mode;
- int writeable;
+ unsigned long dev_state;
int in_fs_metadata;
int missing;
int is_tgtdev_for_dev_replace;
--
2.15.0
--
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