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btrfs: add helper to get the end offset of a file extent item

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Getting the end offset for a file extent item requires a bit of code since
the extent can be either inline or regular/prealloc. There are some places
all over the code base that open code this logic and in another patch
later in this series it will be needed again. Therefore encapsulate this
logic in a helper function and use it.

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Filipe Manana
2020-03-09 12:41:06 +00:00
committed by David Sterba
parent 95418ed1d1
commit a5eeb3d17b
5 changed files with 34 additions and 76 deletions
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10
fs/btrfs/inode.c
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@@ -6521,6 +6521,7 @@ struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
extent_type = btrfs_file_extent_type(leaf, item);
extent_start = found_key.offset;
extent_end = btrfs_file_extent_end(path);
if (extent_type == BTRFS_FILE_EXTENT_REG ||
extent_type == BTRFS_FILE_EXTENT_PREALLOC) {
/* Only regular file could have regular/prealloc extent */
@@ -6531,18 +6532,9 @@ struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
btrfs_ino(inode));
goto out;
}
extent_end = extent_start +
btrfs_file_extent_num_bytes(leaf, item);
trace_btrfs_get_extent_show_fi_regular(inode, leaf, item,
extent_start);
} else if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
size_t size;
size = btrfs_file_extent_ram_bytes(leaf, item);
extent_end = ALIGN(extent_start + size,
fs_info->sectorsize);
trace_btrfs_get_extent_show_fi_inline(inode, leaf, item,
path->slots[0],
extent_start);