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72b28077a2
We've observed that btrfs_get_extent() and merge_extent_mapping() could return -EEXIST in several cases, and they are caused by some racy condition, e.g dio read vs dio write, which makes the problem very tricky to reproduce. This adds extent map selftests in order to simulate those racy situations. Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Reviewed-by: Josef Bacik <jbacik@fb.com> [ minor string adjustments ] Signed-off-by: David Sterba <dsterba@suse.com>
53 lines
1.9 KiB
C
53 lines
1.9 KiB
C
/*
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* Copyright (C) 2013 Fusion IO. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License v2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#ifndef __BTRFS_TESTS
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#define __BTRFS_TESTS
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#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
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int btrfs_run_sanity_tests(void);
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#define test_msg(fmt, ...) pr_info("BTRFS: selftest: " fmt, ##__VA_ARGS__)
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struct btrfs_root;
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struct btrfs_trans_handle;
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int btrfs_test_extent_buffer_operations(u32 sectorsize, u32 nodesize);
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int btrfs_test_free_space_cache(u32 sectorsize, u32 nodesize);
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int btrfs_test_extent_io(u32 sectorsize, u32 nodesize);
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int btrfs_test_inodes(u32 sectorsize, u32 nodesize);
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int btrfs_test_qgroups(u32 sectorsize, u32 nodesize);
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int btrfs_test_free_space_tree(u32 sectorsize, u32 nodesize);
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int btrfs_test_extent_map(void);
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struct inode *btrfs_new_test_inode(void);
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struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(u32 nodesize, u32 sectorsize);
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void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info);
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void btrfs_free_dummy_root(struct btrfs_root *root);
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struct btrfs_block_group_cache *
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btrfs_alloc_dummy_block_group(struct btrfs_fs_info *fs_info, unsigned long length);
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void btrfs_free_dummy_block_group(struct btrfs_block_group_cache *cache);
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void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans);
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#else
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static inline int btrfs_run_sanity_tests(void)
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{
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return 0;
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}
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#endif
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#endif
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