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After the rw semaphore has been added, the custom blocking using ::blocking_readers and ::read_lock_wq is redundant. The blocking logic in __btrfs_map_block is replaced by extending the time the semaphore is held, that has the same blocking effect on writes as the previous custom scheme that waited until ::blocking_readers was zero. Signed-off-by: David Sterba <dsterba@suse.com>
28 lines
1.1 KiB
C
28 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) STRATO AG 2012. All rights reserved.
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*/
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#ifndef BTRFS_DEV_REPLACE_H
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#define BTRFS_DEV_REPLACE_H
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struct btrfs_ioctl_dev_replace_args;
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int btrfs_init_dev_replace(struct btrfs_fs_info *fs_info);
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int btrfs_run_dev_replace(struct btrfs_trans_handle *trans,
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struct btrfs_fs_info *fs_info);
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int btrfs_dev_replace_by_ioctl(struct btrfs_fs_info *fs_info,
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struct btrfs_ioctl_dev_replace_args *args);
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void btrfs_dev_replace_status(struct btrfs_fs_info *fs_info,
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struct btrfs_ioctl_dev_replace_args *args);
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int btrfs_dev_replace_cancel(struct btrfs_fs_info *fs_info);
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void btrfs_dev_replace_suspend_for_unmount(struct btrfs_fs_info *fs_info);
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int btrfs_resume_dev_replace_async(struct btrfs_fs_info *fs_info);
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int btrfs_dev_replace_is_ongoing(struct btrfs_dev_replace *dev_replace);
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void btrfs_dev_replace_read_lock(struct btrfs_dev_replace *dev_replace);
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void btrfs_dev_replace_read_unlock(struct btrfs_dev_replace *dev_replace);
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void btrfs_dev_replace_write_lock(struct btrfs_dev_replace *dev_replace);
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void btrfs_dev_replace_write_unlock(struct btrfs_dev_replace *dev_replace);
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#endif
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