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Btrfs: Fix usage of struct extent_map->orig_start 

This makes sure the orig_start field in struct extent_map gets set
everywhere the extent_map structs are created or modified.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2008-11-10 11:53:33 -05:00
parent 39be25cd89
commit 445a694499
2 changed files with 6 additions and 1 deletions
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3
fs/btrfs/file.c
View File

@ -244,16 +244,17 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
split->start = start + len;
split->len = em->start + em->len - (start + len);
split->orig_start = em->orig_start;
split->bdev = em->bdev;
split->flags = flags;
if (compressed) {
split->block_len = em->block_len;
split->block_start = em->block_start;
split->orig_start = em->orig_start;
} else {
split->block_len = split->len;
split->block_start = em->block_start + diff;
split->orig_start = split->start;
}
ret = add_extent_mapping(em_tree, split);

4
fs/btrfs/inode.c
View File

@ -610,6 +610,7 @@ static noinline int submit_compressed_extents(struct inode *inode,
em = alloc_extent_map(GFP_NOFS);
em->start = async_extent->start;
em->len = async_extent->ram_size;
em->orig_start = em->start;
em->block_start = ins.objectid;
em->block_len = ins.offset;
@ -743,6 +744,7 @@ static noinline int cow_file_range(struct inode *inode,
}
em = alloc_extent_map(GFP_NOFS);
em->start = start;
em->orig_start = em->start;
ram_size = ins.offset;
em->len = ins.offset;
@ -1057,6 +1059,7 @@ out_check:
em_tree = &BTRFS_I(inode)->extent_tree;
em = alloc_extent_map(GFP_NOFS);
em->start = cur_offset;
em->orig_start = em->start;
em->len = num_bytes;
em->block_len = num_bytes;
em->block_start = disk_bytenr;
@ -3876,6 +3879,7 @@ again:
}
em->bdev = root->fs_info->fs_devices->latest_bdev;
em->start = EXTENT_MAP_HOLE;
em->orig_start = EXTENT_MAP_HOLE;
em->len = (u64)-1;
em->block_len = (u64)-1;