6a3891c551
I introduced a regression wrt outstanding_extents accounting. These are tricky areas that aren't easily covered by xfstests as we could change MAX_EXTENT_SIZE at any time. So add sanity tests to cover the various conditions that are tricky in order to make sure we don't introduce regressions in the future. Thanks, Signed-off-by: Josef Bacik <jbacik@fb.com>
1123 lines
32 KiB
C
1123 lines
32 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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#include "btrfs-tests.h"
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#include "../ctree.h"
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#include "../btrfs_inode.h"
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#include "../disk-io.h"
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#include "../extent_io.h"
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#include "../volumes.h"
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static void insert_extent(struct btrfs_root *root, u64 start, u64 len,
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u64 ram_bytes, u64 offset, u64 disk_bytenr,
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u64 disk_len, u32 type, u8 compression, int slot)
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{
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struct btrfs_path path;
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struct btrfs_file_extent_item *fi;
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struct extent_buffer *leaf = root->node;
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struct btrfs_key key;
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u32 value_len = sizeof(struct btrfs_file_extent_item);
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if (type == BTRFS_FILE_EXTENT_INLINE)
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value_len += len;
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memset(&path, 0, sizeof(path));
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path.nodes[0] = leaf;
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path.slots[0] = slot;
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key.objectid = BTRFS_FIRST_FREE_OBJECTID;
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key.type = BTRFS_EXTENT_DATA_KEY;
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key.offset = start;
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setup_items_for_insert(root, &path, &key, &value_len, value_len,
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value_len + sizeof(struct btrfs_item), 1);
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fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item);
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btrfs_set_file_extent_generation(leaf, fi, 1);
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btrfs_set_file_extent_type(leaf, fi, type);
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btrfs_set_file_extent_disk_bytenr(leaf, fi, disk_bytenr);
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btrfs_set_file_extent_disk_num_bytes(leaf, fi, disk_len);
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btrfs_set_file_extent_offset(leaf, fi, offset);
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btrfs_set_file_extent_num_bytes(leaf, fi, len);
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btrfs_set_file_extent_ram_bytes(leaf, fi, ram_bytes);
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btrfs_set_file_extent_compression(leaf, fi, compression);
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btrfs_set_file_extent_encryption(leaf, fi, 0);
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btrfs_set_file_extent_other_encoding(leaf, fi, 0);
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}
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static void insert_inode_item_key(struct btrfs_root *root)
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{
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struct btrfs_path path;
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struct extent_buffer *leaf = root->node;
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struct btrfs_key key;
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u32 value_len = 0;
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memset(&path, 0, sizeof(path));
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path.nodes[0] = leaf;
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path.slots[0] = 0;
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key.objectid = BTRFS_INODE_ITEM_KEY;
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key.type = BTRFS_INODE_ITEM_KEY;
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key.offset = 0;
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setup_items_for_insert(root, &path, &key, &value_len, value_len,
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value_len + sizeof(struct btrfs_item), 1);
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}
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/*
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* Build the most complicated map of extents the earth has ever seen. We want
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* this so we can test all of the corner cases of btrfs_get_extent. Here is a
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* diagram of how the extents will look though this may not be possible we still
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* want to make sure everything acts normally (the last number is not inclusive)
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*
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* [0 - 5][5 - 6][6 - 10][10 - 4096][ 4096 - 8192 ][8192 - 12288]
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* [hole ][inline][ hole ][ regular ][regular1 split][ hole ]
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*
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* [ 12288 - 20480][20480 - 24576][ 24576 - 28672 ][28672 - 36864][36864 - 45056]
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* [regular1 split][ prealloc1 ][prealloc1 written][ prealloc1 ][ compressed ]
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*
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* [45056 - 49152][49152-53248][53248-61440][61440-65536][ 65536+81920 ]
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* [ compressed1 ][ regular ][compressed1][ regular ][ hole but no extent]
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*
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* [81920-86016]
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* [ regular ]
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*/
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static void setup_file_extents(struct btrfs_root *root)
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{
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int slot = 0;
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u64 disk_bytenr = 1 * 1024 * 1024;
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u64 offset = 0;
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/* First we want a hole */
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insert_extent(root, offset, 5, 5, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0,
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slot);
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slot++;
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offset += 5;
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/*
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* Now we want an inline extent, I don't think this is possible but hey
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* why not? Also keep in mind if we have an inline extent it counts as
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* the whole first page. If we were to expand it we would have to cow
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* and we wouldn't have an inline extent anymore.
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*/
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insert_extent(root, offset, 1, 1, 0, 0, 0, BTRFS_FILE_EXTENT_INLINE, 0,
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slot);
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slot++;
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offset = 4096;
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/* Now another hole */
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insert_extent(root, offset, 4, 4, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0,
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slot);
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slot++;
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offset += 4;
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/* Now for a regular extent */
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insert_extent(root, offset, 4095, 4095, 0, disk_bytenr, 4096,
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BTRFS_FILE_EXTENT_REG, 0, slot);
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slot++;
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disk_bytenr += 4096;
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offset += 4095;
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/*
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* Now for 3 extents that were split from a hole punch so we test
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* offsets properly.
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*/
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insert_extent(root, offset, 4096, 16384, 0, disk_bytenr, 16384,
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BTRFS_FILE_EXTENT_REG, 0, slot);
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slot++;
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offset += 4096;
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insert_extent(root, offset, 4096, 4096, 0, 0, 0, BTRFS_FILE_EXTENT_REG,
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0, slot);
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slot++;
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offset += 4096;
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insert_extent(root, offset, 8192, 16384, 8192, disk_bytenr, 16384,
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BTRFS_FILE_EXTENT_REG, 0, slot);
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slot++;
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offset += 8192;
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disk_bytenr += 16384;
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/* Now for a unwritten prealloc extent */
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insert_extent(root, offset, 4096, 4096, 0, disk_bytenr, 4096,
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BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
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slot++;
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offset += 4096;
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/*
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* We want to jack up disk_bytenr a little more so the em stuff doesn't
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* merge our records.
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*/
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disk_bytenr += 8192;
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/*
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* Now for a partially written prealloc extent, basically the same as
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* the hole punch example above. Ram_bytes never changes when you mark
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* extents written btw.
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*/
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insert_extent(root, offset, 4096, 16384, 0, disk_bytenr, 16384,
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BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
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slot++;
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offset += 4096;
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insert_extent(root, offset, 4096, 16384, 4096, disk_bytenr, 16384,
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BTRFS_FILE_EXTENT_REG, 0, slot);
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slot++;
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offset += 4096;
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insert_extent(root, offset, 8192, 16384, 8192, disk_bytenr, 16384,
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BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
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slot++;
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offset += 8192;
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disk_bytenr += 16384;
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/* Now a normal compressed extent */
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insert_extent(root, offset, 8192, 8192, 0, disk_bytenr, 4096,
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BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
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slot++;
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offset += 8192;
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/* No merges */
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disk_bytenr += 8192;
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/* Now a split compressed extent */
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insert_extent(root, offset, 4096, 16384, 0, disk_bytenr, 4096,
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BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
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slot++;
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offset += 4096;
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insert_extent(root, offset, 4096, 4096, 0, disk_bytenr + 4096, 4096,
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BTRFS_FILE_EXTENT_REG, 0, slot);
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slot++;
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offset += 4096;
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insert_extent(root, offset, 8192, 16384, 8192, disk_bytenr, 4096,
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BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
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slot++;
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offset += 8192;
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disk_bytenr += 8192;
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/* Now extents that have a hole but no hole extent */
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insert_extent(root, offset, 4096, 4096, 0, disk_bytenr, 4096,
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BTRFS_FILE_EXTENT_REG, 0, slot);
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slot++;
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offset += 16384;
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disk_bytenr += 4096;
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insert_extent(root, offset, 4096, 4096, 0, disk_bytenr, 4096,
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BTRFS_FILE_EXTENT_REG, 0, slot);
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}
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static unsigned long prealloc_only = 0;
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static unsigned long compressed_only = 0;
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static unsigned long vacancy_only = 0;
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static noinline int test_btrfs_get_extent(void)
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{
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struct inode *inode = NULL;
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struct btrfs_root *root = NULL;
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struct extent_map *em = NULL;
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u64 orig_start;
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u64 disk_bytenr;
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u64 offset;
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int ret = -ENOMEM;
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inode = btrfs_new_test_inode();
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if (!inode) {
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test_msg("Couldn't allocate inode\n");
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return ret;
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}
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BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
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BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
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BTRFS_I(inode)->location.offset = 0;
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root = btrfs_alloc_dummy_root();
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if (IS_ERR(root)) {
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test_msg("Couldn't allocate root\n");
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goto out;
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}
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/*
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* We do this since btrfs_get_extent wants to assign em->bdev to
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* root->fs_info->fs_devices->latest_bdev.
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*/
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root->fs_info = btrfs_alloc_dummy_fs_info();
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if (!root->fs_info) {
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test_msg("Couldn't allocate dummy fs info\n");
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goto out;
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}
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root->node = alloc_dummy_extent_buffer(NULL, 4096);
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if (!root->node) {
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test_msg("Couldn't allocate dummy buffer\n");
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goto out;
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}
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/*
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* We will just free a dummy node if it's ref count is 2 so we need an
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* extra ref so our searches don't accidently release our page.
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*/
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extent_buffer_get(root->node);
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btrfs_set_header_nritems(root->node, 0);
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btrfs_set_header_level(root->node, 0);
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ret = -EINVAL;
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/* First with no extents */
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BTRFS_I(inode)->root = root;
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em = btrfs_get_extent(inode, NULL, 0, 0, 4096, 0);
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if (IS_ERR(em)) {
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em = NULL;
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test_msg("Got an error when we shouldn't have\n");
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goto out;
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}
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if (em->block_start != EXTENT_MAP_HOLE) {
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test_msg("Expected a hole, got %llu\n", em->block_start);
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goto out;
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}
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if (!test_bit(EXTENT_FLAG_VACANCY, &em->flags)) {
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test_msg("Vacancy flag wasn't set properly\n");
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goto out;
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}
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free_extent_map(em);
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btrfs_drop_extent_cache(inode, 0, (u64)-1, 0);
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/*
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* All of the magic numbers are based on the mapping setup in
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* setup_file_extents, so if you change anything there you need to
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* update the comment and update the expected values below.
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*/
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setup_file_extents(root);
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em = btrfs_get_extent(inode, NULL, 0, 0, (u64)-1, 0);
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if (IS_ERR(em)) {
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test_msg("Got an error when we shouldn't have\n");
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goto out;
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}
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if (em->block_start != EXTENT_MAP_HOLE) {
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test_msg("Expected a hole, got %llu\n", em->block_start);
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goto out;
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}
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if (em->start != 0 || em->len != 5) {
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test_msg("Unexpected extent wanted start 0 len 5, got start "
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"%llu len %llu\n", em->start, em->len);
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goto out;
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}
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if (em->flags != 0) {
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test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
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goto out;
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}
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offset = em->start + em->len;
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free_extent_map(em);
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em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
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if (IS_ERR(em)) {
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test_msg("Got an error when we shouldn't have\n");
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goto out;
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}
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if (em->block_start != EXTENT_MAP_INLINE) {
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test_msg("Expected an inline, got %llu\n", em->block_start);
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goto out;
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}
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if (em->start != offset || em->len != 4091) {
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test_msg("Unexpected extent wanted start %llu len 1, got start "
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"%llu len %llu\n", offset, em->start, em->len);
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goto out;
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}
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if (em->flags != 0) {
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test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
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goto out;
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}
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/*
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* We don't test anything else for inline since it doesn't get set
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* unless we have a page for it to write into. Maybe we should change
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* this?
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*/
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offset = em->start + em->len;
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free_extent_map(em);
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em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
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if (IS_ERR(em)) {
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test_msg("Got an error when we shouldn't have\n");
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goto out;
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}
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if (em->block_start != EXTENT_MAP_HOLE) {
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test_msg("Expected a hole, got %llu\n", em->block_start);
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goto out;
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}
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if (em->start != offset || em->len != 4) {
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test_msg("Unexpected extent wanted start %llu len 4, got start "
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"%llu len %llu\n", offset, em->start, em->len);
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goto out;
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}
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if (em->flags != 0) {
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test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
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goto out;
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}
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offset = em->start + em->len;
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free_extent_map(em);
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/* Regular extent */
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em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
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if (IS_ERR(em)) {
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test_msg("Got an error when we shouldn't have\n");
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goto out;
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}
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if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
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test_msg("Expected a real extent, got %llu\n", em->block_start);
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goto out;
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}
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if (em->start != offset || em->len != 4095) {
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test_msg("Unexpected extent wanted start %llu len 4095, got "
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"start %llu len %llu\n", offset, em->start, em->len);
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goto out;
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}
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if (em->flags != 0) {
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test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
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goto out;
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}
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if (em->orig_start != em->start) {
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test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
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em->orig_start);
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goto out;
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}
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offset = em->start + em->len;
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free_extent_map(em);
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|
|
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/* The next 3 are split extents */
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em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
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if (IS_ERR(em)) {
|
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test_msg("Got an error when we shouldn't have\n");
|
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goto out;
|
|
}
|
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if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
|
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test_msg("Expected a real extent, got %llu\n", em->block_start);
|
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goto out;
|
|
}
|
|
if (em->start != offset || em->len != 4096) {
|
|
test_msg("Unexpected extent wanted start %llu len 4096, got "
|
|
"start %llu len %llu\n", offset, em->start, em->len);
|
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goto out;
|
|
}
|
|
if (em->flags != 0) {
|
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test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
|
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goto out;
|
|
}
|
|
if (em->orig_start != em->start) {
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test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
|
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em->orig_start);
|
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goto out;
|
|
}
|
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disk_bytenr = em->block_start;
|
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orig_start = em->start;
|
|
offset = em->start + em->len;
|
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free_extent_map(em);
|
|
|
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em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
|
|
if (IS_ERR(em)) {
|
|
test_msg("Got an error when we shouldn't have\n");
|
|
goto out;
|
|
}
|
|
if (em->block_start != EXTENT_MAP_HOLE) {
|
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test_msg("Expected a hole, got %llu\n", em->block_start);
|
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goto out;
|
|
}
|
|
if (em->start != offset || em->len != 4096) {
|
|
test_msg("Unexpected extent wanted start %llu len 4096, got "
|
|
"start %llu len %llu\n", offset, em->start, em->len);
|
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goto out;
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|
}
|
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if (em->flags != 0) {
|
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test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
|
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goto out;
|
|
}
|
|
offset = em->start + em->len;
|
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free_extent_map(em);
|
|
|
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em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
|
|
if (IS_ERR(em)) {
|
|
test_msg("Got an error when we shouldn't have\n");
|
|
goto out;
|
|
}
|
|
if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
|
|
test_msg("Expected a real extent, got %llu\n", em->block_start);
|
|
goto out;
|
|
}
|
|
if (em->start != offset || em->len != 8192) {
|
|
test_msg("Unexpected extent wanted start %llu len 8192, got "
|
|
"start %llu len %llu\n", offset, em->start, em->len);
|
|
goto out;
|
|
}
|
|
if (em->flags != 0) {
|
|
test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
|
|
goto out;
|
|
}
|
|
if (em->orig_start != orig_start) {
|
|
test_msg("Wrong orig offset, want %llu, have %llu\n",
|
|
orig_start, em->orig_start);
|
|
goto out;
|
|
}
|
|
disk_bytenr += (em->start - orig_start);
|
|
if (em->block_start != disk_bytenr) {
|
|
test_msg("Wrong block start, want %llu, have %llu\n",
|
|
disk_bytenr, em->block_start);
|
|
goto out;
|
|
}
|
|
offset = em->start + em->len;
|
|
free_extent_map(em);
|
|
|
|
/* Prealloc extent */
|
|
em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
|
|
if (IS_ERR(em)) {
|
|
test_msg("Got an error when we shouldn't have\n");
|
|
goto out;
|
|
}
|
|
if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
|
|
test_msg("Expected a real extent, got %llu\n", em->block_start);
|
|
goto out;
|
|
}
|
|
if (em->start != offset || em->len != 4096) {
|
|
test_msg("Unexpected extent wanted start %llu len 4096, got "
|
|
"start %llu len %llu\n", offset, em->start, em->len);
|
|
goto out;
|
|
}
|
|
if (em->flags != prealloc_only) {
|
|
test_msg("Unexpected flags set, want %lu have %lu\n",
|
|
prealloc_only, em->flags);
|
|
goto out;
|
|
}
|
|
if (em->orig_start != em->start) {
|
|
test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
|
|
em->orig_start);
|
|
goto out;
|
|
}
|
|
offset = em->start + em->len;
|
|
free_extent_map(em);
|
|
|
|
/* The next 3 are a half written prealloc extent */
|
|
em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
|
|
if (IS_ERR(em)) {
|
|
test_msg("Got an error when we shouldn't have\n");
|
|
goto out;
|
|
}
|
|
if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
|
|
test_msg("Expected a real extent, got %llu\n", em->block_start);
|
|
goto out;
|
|
}
|
|
if (em->start != offset || em->len != 4096) {
|
|
test_msg("Unexpected extent wanted start %llu len 4096, got "
|
|
"start %llu len %llu\n", offset, em->start, em->len);
|
|
goto out;
|
|
}
|
|
if (em->flags != prealloc_only) {
|
|
test_msg("Unexpected flags set, want %lu have %lu\n",
|
|
prealloc_only, em->flags);
|
|
goto out;
|
|
}
|
|
if (em->orig_start != em->start) {
|
|
test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
|
|
em->orig_start);
|
|
goto out;
|
|
}
|
|
disk_bytenr = em->block_start;
|
|
orig_start = em->start;
|
|
offset = em->start + em->len;
|
|
free_extent_map(em);
|
|
|
|
em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
|
|
if (IS_ERR(em)) {
|
|
test_msg("Got an error when we shouldn't have\n");
|
|
goto out;
|
|
}
|
|
if (em->block_start >= EXTENT_MAP_HOLE) {
|
|
test_msg("Expected a real extent, got %llu\n", em->block_start);
|
|
goto out;
|
|
}
|
|
if (em->start != offset || em->len != 4096) {
|
|
test_msg("Unexpected extent wanted start %llu len 4096, got "
|
|
"start %llu len %llu\n", offset, em->start, em->len);
|
|
goto out;
|
|
}
|
|
if (em->flags != 0) {
|
|
test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
|
|
goto out;
|
|
}
|
|
if (em->orig_start != orig_start) {
|
|
test_msg("Unexpected orig offset, wanted %llu, have %llu\n",
|
|
orig_start, em->orig_start);
|
|
goto out;
|
|
}
|
|
if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
|
|
test_msg("Unexpected block start, wanted %llu, have %llu\n",
|
|
disk_bytenr + (em->start - em->orig_start),
|
|
em->block_start);
|
|
goto out;
|
|
}
|
|
offset = em->start + em->len;
|
|
free_extent_map(em);
|
|
|
|
em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
|
|
if (IS_ERR(em)) {
|
|
test_msg("Got an error when we shouldn't have\n");
|
|
goto out;
|
|
}
|
|
if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
|
|
test_msg("Expected a real extent, got %llu\n", em->block_start);
|
|
goto out;
|
|
}
|
|
if (em->start != offset || em->len != 8192) {
|
|
test_msg("Unexpected extent wanted start %llu len 8192, got "
|
|
"start %llu len %llu\n", offset, em->start, em->len);
|
|
goto out;
|
|
}
|
|
if (em->flags != prealloc_only) {
|
|
test_msg("Unexpected flags set, want %lu have %lu\n",
|
|
prealloc_only, em->flags);
|
|
goto out;
|
|
}
|
|
if (em->orig_start != orig_start) {
|
|
test_msg("Wrong orig offset, want %llu, have %llu\n", orig_start,
|
|
em->orig_start);
|
|
goto out;
|
|
}
|
|
if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
|
|
test_msg("Unexpected block start, wanted %llu, have %llu\n",
|
|
disk_bytenr + (em->start - em->orig_start),
|
|
em->block_start);
|
|
goto out;
|
|
}
|
|
offset = em->start + em->len;
|
|
free_extent_map(em);
|
|
|
|
/* Now for the compressed extent */
|
|
em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
|
|
if (IS_ERR(em)) {
|
|
test_msg("Got an error when we shouldn't have\n");
|
|
goto out;
|
|
}
|
|
if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
|
|
test_msg("Expected a real extent, got %llu\n", em->block_start);
|
|
goto out;
|
|
}
|
|
if (em->start != offset || em->len != 8192) {
|
|
test_msg("Unexpected extent wanted start %llu len 8192, got "
|
|
"start %llu len %llu\n", offset, em->start, em->len);
|
|
goto out;
|
|
}
|
|
if (em->flags != compressed_only) {
|
|
test_msg("Unexpected flags set, want %lu have %lu\n",
|
|
compressed_only, em->flags);
|
|
goto out;
|
|
}
|
|
if (em->orig_start != em->start) {
|
|
test_msg("Wrong orig offset, want %llu, have %llu\n",
|
|
em->start, em->orig_start);
|
|
goto out;
|
|
}
|
|
if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
|
|
test_msg("Unexpected compress type, wanted %d, got %d\n",
|
|
BTRFS_COMPRESS_ZLIB, em->compress_type);
|
|
goto out;
|
|
}
|
|
offset = em->start + em->len;
|
|
free_extent_map(em);
|
|
|
|
/* Split compressed extent */
|
|
em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
|
|
if (IS_ERR(em)) {
|
|
test_msg("Got an error when we shouldn't have\n");
|
|
goto out;
|
|
}
|
|
if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
|
|
test_msg("Expected a real extent, got %llu\n", em->block_start);
|
|
goto out;
|
|
}
|
|
if (em->start != offset || em->len != 4096) {
|
|
test_msg("Unexpected extent wanted start %llu len 4096, got "
|
|
"start %llu len %llu\n", offset, em->start, em->len);
|
|
goto out;
|
|
}
|
|
if (em->flags != compressed_only) {
|
|
test_msg("Unexpected flags set, want %lu have %lu\n",
|
|
compressed_only, em->flags);
|
|
goto out;
|
|
}
|
|
if (em->orig_start != em->start) {
|
|
test_msg("Wrong orig offset, want %llu, have %llu\n",
|
|
em->start, em->orig_start);
|
|
goto out;
|
|
}
|
|
if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
|
|
test_msg("Unexpected compress type, wanted %d, got %d\n",
|
|
BTRFS_COMPRESS_ZLIB, em->compress_type);
|
|
goto out;
|
|
}
|
|
disk_bytenr = em->block_start;
|
|
orig_start = em->start;
|
|
offset = em->start + em->len;
|
|
free_extent_map(em);
|
|
|
|
em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
|
|
if (IS_ERR(em)) {
|
|
test_msg("Got an error when we shouldn't have\n");
|
|
goto out;
|
|
}
|
|
if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
|
|
test_msg("Expected a real extent, got %llu\n", em->block_start);
|
|
goto out;
|
|
}
|
|
if (em->start != offset || em->len != 4096) {
|
|
test_msg("Unexpected extent wanted start %llu len 4096, got "
|
|
"start %llu len %llu\n", offset, em->start, em->len);
|
|
goto out;
|
|
}
|
|
if (em->flags != 0) {
|
|
test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
|
|
goto out;
|
|
}
|
|
if (em->orig_start != em->start) {
|
|
test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
|
|
em->orig_start);
|
|
goto out;
|
|
}
|
|
offset = em->start + em->len;
|
|
free_extent_map(em);
|
|
|
|
em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
|
|
if (IS_ERR(em)) {
|
|
test_msg("Got an error when we shouldn't have\n");
|
|
goto out;
|
|
}
|
|
if (em->block_start != disk_bytenr) {
|
|
test_msg("Block start does not match, want %llu got %llu\n",
|
|
disk_bytenr, em->block_start);
|
|
goto out;
|
|
}
|
|
if (em->start != offset || em->len != 8192) {
|
|
test_msg("Unexpected extent wanted start %llu len 8192, got "
|
|
"start %llu len %llu\n", offset, em->start, em->len);
|
|
goto out;
|
|
}
|
|
if (em->flags != compressed_only) {
|
|
test_msg("Unexpected flags set, want %lu have %lu\n",
|
|
compressed_only, em->flags);
|
|
goto out;
|
|
}
|
|
if (em->orig_start != orig_start) {
|
|
test_msg("Wrong orig offset, want %llu, have %llu\n",
|
|
em->start, orig_start);
|
|
goto out;
|
|
}
|
|
if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
|
|
test_msg("Unexpected compress type, wanted %d, got %d\n",
|
|
BTRFS_COMPRESS_ZLIB, em->compress_type);
|
|
goto out;
|
|
}
|
|
offset = em->start + em->len;
|
|
free_extent_map(em);
|
|
|
|
/* A hole between regular extents but no hole extent */
|
|
em = btrfs_get_extent(inode, NULL, 0, offset + 6, 4096, 0);
|
|
if (IS_ERR(em)) {
|
|
test_msg("Got an error when we shouldn't have\n");
|
|
goto out;
|
|
}
|
|
if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
|
|
test_msg("Expected a real extent, got %llu\n", em->block_start);
|
|
goto out;
|
|
}
|
|
if (em->start != offset || em->len != 4096) {
|
|
test_msg("Unexpected extent wanted start %llu len 4096, got "
|
|
"start %llu len %llu\n", offset, em->start, em->len);
|
|
goto out;
|
|
}
|
|
if (em->flags != 0) {
|
|
test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
|
|
goto out;
|
|
}
|
|
if (em->orig_start != em->start) {
|
|
test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
|
|
em->orig_start);
|
|
goto out;
|
|
}
|
|
offset = em->start + em->len;
|
|
free_extent_map(em);
|
|
|
|
em = btrfs_get_extent(inode, NULL, 0, offset, 4096 * 1024, 0);
|
|
if (IS_ERR(em)) {
|
|
test_msg("Got an error when we shouldn't have\n");
|
|
goto out;
|
|
}
|
|
if (em->block_start != EXTENT_MAP_HOLE) {
|
|
test_msg("Expected a hole extent, got %llu\n", em->block_start);
|
|
goto out;
|
|
}
|
|
/*
|
|
* Currently we just return a length that we requested rather than the
|
|
* length of the actual hole, if this changes we'll have to change this
|
|
* test.
|
|
*/
|
|
if (em->start != offset || em->len != 12288) {
|
|
test_msg("Unexpected extent wanted start %llu len 12288, got "
|
|
"start %llu len %llu\n", offset, em->start, em->len);
|
|
goto out;
|
|
}
|
|
if (em->flags != vacancy_only) {
|
|
test_msg("Unexpected flags set, want %lu have %lu\n",
|
|
vacancy_only, em->flags);
|
|
goto out;
|
|
}
|
|
if (em->orig_start != em->start) {
|
|
test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
|
|
em->orig_start);
|
|
goto out;
|
|
}
|
|
offset = em->start + em->len;
|
|
free_extent_map(em);
|
|
|
|
em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
|
|
if (IS_ERR(em)) {
|
|
test_msg("Got an error when we shouldn't have\n");
|
|
goto out;
|
|
}
|
|
if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
|
|
test_msg("Expected a real extent, got %llu\n", em->block_start);
|
|
goto out;
|
|
}
|
|
if (em->start != offset || em->len != 4096) {
|
|
test_msg("Unexpected extent wanted start %llu len 4096, got "
|
|
"start %llu len %llu\n", offset, em->start, em->len);
|
|
goto out;
|
|
}
|
|
if (em->flags != 0) {
|
|
test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
|
|
goto out;
|
|
}
|
|
if (em->orig_start != em->start) {
|
|
test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
|
|
em->orig_start);
|
|
goto out;
|
|
}
|
|
ret = 0;
|
|
out:
|
|
if (!IS_ERR(em))
|
|
free_extent_map(em);
|
|
iput(inode);
|
|
btrfs_free_dummy_root(root);
|
|
return ret;
|
|
}
|
|
|
|
static int test_hole_first(void)
|
|
{
|
|
struct inode *inode = NULL;
|
|
struct btrfs_root *root = NULL;
|
|
struct extent_map *em = NULL;
|
|
int ret = -ENOMEM;
|
|
|
|
inode = btrfs_new_test_inode();
|
|
if (!inode) {
|
|
test_msg("Couldn't allocate inode\n");
|
|
return ret;
|
|
}
|
|
|
|
BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
|
|
BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
|
|
BTRFS_I(inode)->location.offset = 0;
|
|
|
|
root = btrfs_alloc_dummy_root();
|
|
if (IS_ERR(root)) {
|
|
test_msg("Couldn't allocate root\n");
|
|
goto out;
|
|
}
|
|
|
|
root->fs_info = btrfs_alloc_dummy_fs_info();
|
|
if (!root->fs_info) {
|
|
test_msg("Couldn't allocate dummy fs info\n");
|
|
goto out;
|
|
}
|
|
|
|
root->node = alloc_dummy_extent_buffer(NULL, 4096);
|
|
if (!root->node) {
|
|
test_msg("Couldn't allocate dummy buffer\n");
|
|
goto out;
|
|
}
|
|
|
|
extent_buffer_get(root->node);
|
|
btrfs_set_header_nritems(root->node, 0);
|
|
btrfs_set_header_level(root->node, 0);
|
|
BTRFS_I(inode)->root = root;
|
|
ret = -EINVAL;
|
|
|
|
/*
|
|
* Need a blank inode item here just so we don't confuse
|
|
* btrfs_get_extent.
|
|
*/
|
|
insert_inode_item_key(root);
|
|
insert_extent(root, 4096, 4096, 4096, 0, 4096, 4096,
|
|
BTRFS_FILE_EXTENT_REG, 0, 1);
|
|
em = btrfs_get_extent(inode, NULL, 0, 0, 8192, 0);
|
|
if (IS_ERR(em)) {
|
|
test_msg("Got an error when we shouldn't have\n");
|
|
goto out;
|
|
}
|
|
if (em->block_start != EXTENT_MAP_HOLE) {
|
|
test_msg("Expected a hole, got %llu\n", em->block_start);
|
|
goto out;
|
|
}
|
|
if (em->start != 0 || em->len != 4096) {
|
|
test_msg("Unexpected extent wanted start 0 len 4096, got start "
|
|
"%llu len %llu\n", em->start, em->len);
|
|
goto out;
|
|
}
|
|
if (em->flags != vacancy_only) {
|
|
test_msg("Wrong flags, wanted %lu, have %lu\n", vacancy_only,
|
|
em->flags);
|
|
goto out;
|
|
}
|
|
free_extent_map(em);
|
|
|
|
em = btrfs_get_extent(inode, NULL, 0, 4096, 8192, 0);
|
|
if (IS_ERR(em)) {
|
|
test_msg("Got an error when we shouldn't have\n");
|
|
goto out;
|
|
}
|
|
if (em->block_start != 4096) {
|
|
test_msg("Expected a real extent, got %llu\n", em->block_start);
|
|
goto out;
|
|
}
|
|
if (em->start != 4096 || em->len != 4096) {
|
|
test_msg("Unexpected extent wanted start 4096 len 4096, got "
|
|
"start %llu len %llu\n", em->start, em->len);
|
|
goto out;
|
|
}
|
|
if (em->flags != 0) {
|
|
test_msg("Unexpected flags set, wanted 0 got %lu\n",
|
|
em->flags);
|
|
goto out;
|
|
}
|
|
ret = 0;
|
|
out:
|
|
if (!IS_ERR(em))
|
|
free_extent_map(em);
|
|
iput(inode);
|
|
btrfs_free_dummy_root(root);
|
|
return ret;
|
|
}
|
|
|
|
static int test_extent_accounting(void)
|
|
{
|
|
struct inode *inode = NULL;
|
|
struct btrfs_root *root = NULL;
|
|
int ret = -ENOMEM;
|
|
|
|
inode = btrfs_new_test_inode();
|
|
if (!inode) {
|
|
test_msg("Couldn't allocate inode\n");
|
|
return ret;
|
|
}
|
|
|
|
root = btrfs_alloc_dummy_root();
|
|
if (IS_ERR(root)) {
|
|
test_msg("Couldn't allocate root\n");
|
|
goto out;
|
|
}
|
|
|
|
root->fs_info = btrfs_alloc_dummy_fs_info();
|
|
if (!root->fs_info) {
|
|
test_msg("Couldn't allocate dummy fs info\n");
|
|
goto out;
|
|
}
|
|
|
|
BTRFS_I(inode)->root = root;
|
|
btrfs_test_inode_set_ops(inode);
|
|
|
|
/* [BTRFS_MAX_EXTENT_SIZE] */
|
|
BTRFS_I(inode)->outstanding_extents++;
|
|
ret = btrfs_set_extent_delalloc(inode, 0, BTRFS_MAX_EXTENT_SIZE - 1,
|
|
NULL);
|
|
if (ret) {
|
|
test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
|
|
goto out;
|
|
}
|
|
if (BTRFS_I(inode)->outstanding_extents != 1) {
|
|
ret = -EINVAL;
|
|
test_msg("Miscount, wanted 1, got %u\n",
|
|
BTRFS_I(inode)->outstanding_extents);
|
|
goto out;
|
|
}
|
|
|
|
/* [BTRFS_MAX_EXTENT_SIZE][4k] */
|
|
BTRFS_I(inode)->outstanding_extents++;
|
|
ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE,
|
|
BTRFS_MAX_EXTENT_SIZE + 4095, NULL);
|
|
if (ret) {
|
|
test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
|
|
goto out;
|
|
}
|
|
if (BTRFS_I(inode)->outstanding_extents != 2) {
|
|
ret = -EINVAL;
|
|
test_msg("Miscount, wanted 2, got %u\n",
|
|
BTRFS_I(inode)->outstanding_extents);
|
|
goto out;
|
|
}
|
|
|
|
/* [BTRFS_MAX_EXTENT_SIZE/2][4K HOLE][the rest] */
|
|
ret = clear_extent_bit(&BTRFS_I(inode)->io_tree,
|
|
BTRFS_MAX_EXTENT_SIZE >> 1,
|
|
(BTRFS_MAX_EXTENT_SIZE >> 1) + 4095,
|
|
EXTENT_DELALLOC | EXTENT_DIRTY |
|
|
EXTENT_UPTODATE | EXTENT_DO_ACCOUNTING, 0, 0,
|
|
NULL, GFP_NOFS);
|
|
if (ret) {
|
|
test_msg("clear_extent_bit returned %d\n", ret);
|
|
goto out;
|
|
}
|
|
if (BTRFS_I(inode)->outstanding_extents != 2) {
|
|
ret = -EINVAL;
|
|
test_msg("Miscount, wanted 2, got %u\n",
|
|
BTRFS_I(inode)->outstanding_extents);
|
|
goto out;
|
|
}
|
|
|
|
/* [BTRFS_MAX_EXTENT_SIZE][4K] */
|
|
BTRFS_I(inode)->outstanding_extents++;
|
|
ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE >> 1,
|
|
(BTRFS_MAX_EXTENT_SIZE >> 1) + 4095,
|
|
NULL);
|
|
if (ret) {
|
|
test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
|
|
goto out;
|
|
}
|
|
if (BTRFS_I(inode)->outstanding_extents != 2) {
|
|
ret = -EINVAL;
|
|
test_msg("Miscount, wanted 2, got %u\n",
|
|
BTRFS_I(inode)->outstanding_extents);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* [BTRFS_MAX_EXTENT_SIZE+4K][4K HOLE][BTRFS_MAX_EXTENT_SIZE+4K]
|
|
*
|
|
* I'm artificially adding 2 to outstanding_extents because in the
|
|
* buffered IO case we'd add things up as we go, but I don't feel like
|
|
* doing that here, this isn't the interesting case we want to test.
|
|
*/
|
|
BTRFS_I(inode)->outstanding_extents += 2;
|
|
ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE + 8192,
|
|
(BTRFS_MAX_EXTENT_SIZE << 1) + 12287,
|
|
NULL);
|
|
if (ret) {
|
|
test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
|
|
goto out;
|
|
}
|
|
if (BTRFS_I(inode)->outstanding_extents != 4) {
|
|
ret = -EINVAL;
|
|
test_msg("Miscount, wanted 4, got %u\n",
|
|
BTRFS_I(inode)->outstanding_extents);
|
|
goto out;
|
|
}
|
|
|
|
/* [BTRFS_MAX_EXTENT_SIZE+4k][4k][BTRFS_MAX_EXTENT_SIZE+4k] */
|
|
BTRFS_I(inode)->outstanding_extents++;
|
|
ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE+4096,
|
|
BTRFS_MAX_EXTENT_SIZE+8191, NULL);
|
|
if (ret) {
|
|
test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
|
|
goto out;
|
|
}
|
|
if (BTRFS_I(inode)->outstanding_extents != 3) {
|
|
ret = -EINVAL;
|
|
test_msg("Miscount, wanted 3, got %u\n",
|
|
BTRFS_I(inode)->outstanding_extents);
|
|
goto out;
|
|
}
|
|
|
|
/* [BTRFS_MAX_EXTENT_SIZE+4k][4K HOLE][BTRFS_MAX_EXTENT_SIZE+4k] */
|
|
ret = clear_extent_bit(&BTRFS_I(inode)->io_tree,
|
|
BTRFS_MAX_EXTENT_SIZE+4096,
|
|
BTRFS_MAX_EXTENT_SIZE+8191,
|
|
EXTENT_DIRTY | EXTENT_DELALLOC |
|
|
EXTENT_DO_ACCOUNTING | EXTENT_UPTODATE, 0, 0,
|
|
NULL, GFP_NOFS);
|
|
if (ret) {
|
|
test_msg("clear_extent_bit returned %d\n", ret);
|
|
goto out;
|
|
}
|
|
if (BTRFS_I(inode)->outstanding_extents != 4) {
|
|
ret = -EINVAL;
|
|
test_msg("Miscount, wanted 4, got %u\n",
|
|
BTRFS_I(inode)->outstanding_extents);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Refill the hole again just for good measure, because I thought it
|
|
* might fail and I'd rather satisfy my paranoia at this point.
|
|
*/
|
|
BTRFS_I(inode)->outstanding_extents++;
|
|
ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE+4096,
|
|
BTRFS_MAX_EXTENT_SIZE+8191, NULL);
|
|
if (ret) {
|
|
test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
|
|
goto out;
|
|
}
|
|
if (BTRFS_I(inode)->outstanding_extents != 3) {
|
|
ret = -EINVAL;
|
|
test_msg("Miscount, wanted 3, got %u\n",
|
|
BTRFS_I(inode)->outstanding_extents);
|
|
goto out;
|
|
}
|
|
|
|
/* Empty */
|
|
ret = clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1,
|
|
EXTENT_DIRTY | EXTENT_DELALLOC |
|
|
EXTENT_DO_ACCOUNTING | EXTENT_UPTODATE, 0, 0,
|
|
NULL, GFP_NOFS);
|
|
if (ret) {
|
|
test_msg("clear_extent_bit returned %d\n", ret);
|
|
goto out;
|
|
}
|
|
if (BTRFS_I(inode)->outstanding_extents) {
|
|
ret = -EINVAL;
|
|
test_msg("Miscount, wanted 0, got %u\n",
|
|
BTRFS_I(inode)->outstanding_extents);
|
|
goto out;
|
|
}
|
|
ret = 0;
|
|
out:
|
|
if (ret)
|
|
clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1,
|
|
EXTENT_DIRTY | EXTENT_DELALLOC |
|
|
EXTENT_DO_ACCOUNTING | EXTENT_UPTODATE, 0, 0,
|
|
NULL, GFP_NOFS);
|
|
iput(inode);
|
|
btrfs_free_dummy_root(root);
|
|
return ret;
|
|
}
|
|
|
|
int btrfs_test_inodes(void)
|
|
{
|
|
int ret;
|
|
|
|
set_bit(EXTENT_FLAG_COMPRESSED, &compressed_only);
|
|
set_bit(EXTENT_FLAG_VACANCY, &vacancy_only);
|
|
set_bit(EXTENT_FLAG_PREALLOC, &prealloc_only);
|
|
|
|
test_msg("Running btrfs_get_extent tests\n");
|
|
ret = test_btrfs_get_extent();
|
|
if (ret)
|
|
return ret;
|
|
test_msg("Running hole first btrfs_get_extent test\n");
|
|
ret = test_hole_first();
|
|
if (ret)
|
|
return ret;
|
|
test_msg("Running outstanding_extents tests\n");
|
|
return test_extent_accounting();
|
|
}
|