From 401e29c124eac2b9373eb72f36f202561da339d2 Mon Sep 17 00:00:00 2001 From: Anand Jain Date: Mon, 4 Dec 2017 12:54:55 +0800 Subject: [PATCH] btrfs: cleanup device states define BTRFS_DEV_STATE_REPLACE_TGT Currently device state is being managed by each individual int variable such as struct btrfs_device::is_tgtdev_for_dev_replace. Instead of that declare btrfs_device::dev_state BTRFS_DEV_STATE_MISSING and use the bit operations. Signed-off-by: Anand Jain [ whitespace adjustments ] Signed-off-by: David Sterba --- fs/btrfs/dev-replace.c | 5 +++-- fs/btrfs/extent-tree.c | 2 +- fs/btrfs/ioctl.c | 2 +- fs/btrfs/scrub.c | 2 +- fs/btrfs/super.c | 3 ++- fs/btrfs/volumes.c | 39 ++++++++++++++++++++++----------------- fs/btrfs/volumes.h | 2 +- 7 files changed, 31 insertions(+), 24 deletions(-) diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c index d2c820c..7efbc4d 100644 --- a/fs/btrfs/dev-replace.c +++ b/fs/btrfs/dev-replace.c @@ -172,7 +172,8 @@ no_valid_dev_replace_entry_found: dev_replace->tgtdev->commit_bytes_used = dev_replace->srcdev->commit_bytes_used; } - dev_replace->tgtdev->is_tgtdev_for_dev_replace = 1; + set_bit(BTRFS_DEV_STATE_REPLACE_TGT, + &dev_replace->tgtdev->dev_state); btrfs_init_dev_replace_tgtdev_for_resume(fs_info, dev_replace->tgtdev); } @@ -566,7 +567,7 @@ static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info, btrfs_dev_name(src_device), src_device->devid, rcu_str_deref(tgt_device->name)); - tgt_device->is_tgtdev_for_dev_replace = 0; + clear_bit(BTRFS_DEV_STATE_REPLACE_TGT, &tgt_device->dev_state); tgt_device->devid = src_device->devid; src_device->devid = BTRFS_DEV_REPLACE_DEVID; memcpy(uuid_tmp, tgt_device->uuid, sizeof(uuid_tmp)); diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 53cb2a1..8d51e4b 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -9693,7 +9693,7 @@ int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr) * space to fit our block group in. */ if (device->total_bytes > device->bytes_used + min_free && - !device->is_tgtdev_for_dev_replace) { + !test_bit(BTRFS_DEV_STATE_REPLACE_TGT, &device->dev_state)) { ret = find_free_dev_extent(trans, device, min_free, &dev_offset, NULL); if (!ret) diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 8c75e55..a1fd5f7 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -1528,7 +1528,7 @@ static noinline int btrfs_ioctl_resize(struct file *file, } } - if (device->is_tgtdev_for_dev_replace) { + if (test_bit(BTRFS_DEV_STATE_REPLACE_TGT, &device->dev_state)) { ret = -EPERM; goto out_free; } diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c index f8a073c..03da807 100644 --- a/fs/btrfs/scrub.c +++ b/fs/btrfs/scrub.c @@ -4131,7 +4131,7 @@ int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, mutex_lock(&fs_info->scrub_lock); if (!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &dev->dev_state) || - dev->is_tgtdev_for_dev_replace) { + test_bit(BTRFS_DEV_STATE_REPLACE_TGT, &dev->dev_state)) { mutex_unlock(&fs_info->scrub_lock); mutex_unlock(&fs_info->fs_devices->device_list_mutex); return -EIO; diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index ba53245..84707e7 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -1974,7 +1974,8 @@ static int btrfs_calc_avail_data_space(struct btrfs_fs_info *fs_info, list_for_each_entry_rcu(device, &fs_devices->devices, dev_list) { if (!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &device->dev_state) || - !device->bdev || device->is_tgtdev_for_dev_replace) + !device->bdev || + test_bit(BTRFS_DEV_STATE_REPLACE_TGT, &device->dev_state)) continue; if (i >= nr_devices) diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index a102e77..3690822 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -911,9 +911,10 @@ again: list_for_each_entry_safe(device, next, &fs_devices->devices, dev_list) { if (test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &device->dev_state)) { - if (!device->is_tgtdev_for_dev_replace && - (!latest_dev || - device->generation > latest_dev->generation)) { + if (!test_bit(BTRFS_DEV_STATE_REPLACE_TGT, + &device->dev_state) && + (!latest_dev || + device->generation > latest_dev->generation)) { latest_dev = device; } continue; @@ -930,7 +931,8 @@ again: * not, which means whether this device is * used or whether it should be removed. */ - if (step == 0 || device->is_tgtdev_for_dev_replace) { + if (step == 0 || test_bit(BTRFS_DEV_STATE_REPLACE_TGT, + &device->dev_state)) { continue; } } @@ -942,7 +944,8 @@ again: if (test_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state)) { list_del_init(&device->dev_alloc_list); clear_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state); - if (!device->is_tgtdev_for_dev_replace) + if (!test_bit(BTRFS_DEV_STATE_REPLACE_TGT, + &device->dev_state)) fs_devices->rw_devices--; } list_del_init(&device->dev_list); @@ -1250,7 +1253,8 @@ int btrfs_account_dev_extents_size(struct btrfs_device *device, u64 start, *length = 0; - if (start >= device->total_bytes || device->is_tgtdev_for_dev_replace) + if (start >= device->total_bytes || + test_bit(BTRFS_DEV_STATE_REPLACE_TGT, &device->dev_state)) return 0; path = btrfs_alloc_path(); @@ -1428,7 +1432,8 @@ int find_free_dev_extent_start(struct btrfs_transaction *transaction, max_hole_size = 0; again: - if (search_start >= search_end || device->is_tgtdev_for_dev_replace) { + if (search_start >= search_end || + test_bit(BTRFS_DEV_STATE_REPLACE_TGT, &device->dev_state)) { ret = -ENOSPC; goto out; } @@ -1636,7 +1641,7 @@ static int btrfs_alloc_dev_extent(struct btrfs_trans_handle *trans, struct btrfs_key key; WARN_ON(!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &device->dev_state)); - WARN_ON(device->is_tgtdev_for_dev_replace); + WARN_ON(test_bit(BTRFS_DEV_STATE_REPLACE_TGT, &device->dev_state)); path = btrfs_alloc_path(); if (!path) return -ENOMEM; @@ -1944,7 +1949,7 @@ int btrfs_rm_device(struct btrfs_fs_info *fs_info, const char *device_path, if (ret) goto out; - if (device->is_tgtdev_for_dev_replace) { + if (test_bit(BTRFS_DEV_STATE_REPLACE_TGT, &device->dev_state)) { ret = BTRFS_ERROR_DEV_TGT_REPLACE; goto out; } @@ -2451,7 +2456,7 @@ int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *device_path device->fs_info = fs_info; device->bdev = bdev; set_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &device->dev_state); - device->is_tgtdev_for_dev_replace = 0; + clear_bit(BTRFS_DEV_STATE_REPLACE_TGT, &device->dev_state); device->mode = FMODE_EXCL; device->dev_stats_valid = 1; set_blocksize(device->bdev, BTRFS_BDEV_BLOCKSIZE); @@ -2660,7 +2665,7 @@ int btrfs_init_dev_replace_tgtdev(struct btrfs_fs_info *fs_info, device->fs_info = fs_info; device->bdev = bdev; set_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &device->dev_state); - device->is_tgtdev_for_dev_replace = 1; + set_bit(BTRFS_DEV_STATE_REPLACE_TGT, &device->dev_state); device->mode = FMODE_EXCL; device->dev_stats_valid = 1; set_blocksize(device->bdev, BTRFS_BDEV_BLOCKSIZE); @@ -2756,7 +2761,7 @@ int btrfs_grow_device(struct btrfs_trans_handle *trans, diff = round_down(new_size - device->total_bytes, fs_info->sectorsize); if (new_size <= device->total_bytes || - device->is_tgtdev_for_dev_replace) { + test_bit(BTRFS_DEV_STATE_REPLACE_TGT, &device->dev_state)) { mutex_unlock(&fs_info->chunk_mutex); return -EINVAL; } @@ -3569,7 +3574,7 @@ static int __btrfs_balance(struct btrfs_fs_info *fs_info) 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) + test_bit(BTRFS_DEV_STATE_REPLACE_TGT, &device->dev_state)) continue; ret = btrfs_shrink_device(device, old_size - size_to_free); @@ -4437,7 +4442,7 @@ int btrfs_shrink_device(struct btrfs_device *device, u64 new_size) new_size = round_down(new_size, fs_info->sectorsize); diff = round_down(old_size - new_size, fs_info->sectorsize); - if (device->is_tgtdev_for_dev_replace) + if (test_bit(BTRFS_DEV_STATE_REPLACE_TGT, &device->dev_state)) return -EINVAL; path = btrfs_alloc_path(); @@ -4742,7 +4747,7 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans, if (!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &device->dev_state) || - device->is_tgtdev_for_dev_replace) + test_bit(BTRFS_DEV_STATE_REPLACE_TGT, &device->dev_state)) continue; if (device->total_bytes > device->bytes_used) @@ -6566,7 +6571,7 @@ static void fill_device_from_item(struct extent_buffer *leaf, device->io_width = btrfs_device_io_width(leaf, dev_item); device->sector_size = btrfs_device_sector_size(leaf, dev_item); WARN_ON(device->devid == BTRFS_DEV_REPLACE_DEVID); - device->is_tgtdev_for_dev_replace = 0; + clear_bit(BTRFS_DEV_STATE_REPLACE_TGT, &device->dev_state); ptr = btrfs_device_uuid(dev_item); read_extent_buffer(leaf, device->uuid, ptr, BTRFS_UUID_SIZE); @@ -6716,7 +6721,7 @@ static int read_one_dev(struct btrfs_fs_info *fs_info, fill_device_from_item(leaf, dev_item, device); set_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &device->dev_state); if (test_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state) && - !device->is_tgtdev_for_dev_replace) { + !test_bit(BTRFS_DEV_STATE_REPLACE_TGT, &device->dev_state)) { 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 68affb0..2ac1231 100644 --- a/fs/btrfs/volumes.h +++ b/fs/btrfs/volumes.h @@ -50,6 +50,7 @@ struct btrfs_pending_bios { #define BTRFS_DEV_STATE_WRITEABLE (0) #define BTRFS_DEV_STATE_IN_FS_METADATA (1) #define BTRFS_DEV_STATE_MISSING (2) +#define BTRFS_DEV_STATE_REPLACE_TGT (3) struct btrfs_device { struct list_head dev_list; @@ -74,7 +75,6 @@ struct btrfs_device { fmode_t mode; unsigned long dev_state; - int is_tgtdev_for_dev_replace; blk_status_t last_flush_error; int flush_bio_sent; -- 2.7.4