On 06/29/2011 12:32 PM, Arne Jansen wrote:
> Add a READAHEAD extent buffer flag.
> Add a function to trigger a read with this flag set.
>
> Changes v2:
> - use extent buffer flags instead of extent state flags
>
> Signed-off-by: Arne Jansen <sensille@xxxxxxx>
> ---
> fs/btrfs/disk-io.c | 32 ++++++++++++++++++++++++++++++++
> fs/btrfs/disk-io.h | 2 ++
> fs/btrfs/extent_io.h | 1 +
> 3 files changed, 35 insertions(+), 0 deletions(-)
>
> diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
> index 0339cc0..0195172 100644
> --- a/fs/btrfs/disk-io.c
> +++ b/fs/btrfs/disk-io.c
> @@ -945,6 +945,38 @@ int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize,
> return ret;
> }
>
> +int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, u32 blocksize,
> + int mirror_num, struct extent_buffer **eb)
> +{
> + struct extent_buffer *buf = NULL;
> + struct inode *btree_inode = root->fs_info->btree_inode;
> + struct extent_io_tree *io_tree = &BTRFS_I(btree_inode)->io_tree;
> + int ret;
> +
> + buf = btrfs_find_create_tree_block(root, bytenr, blocksize);
> + if (!buf)
> + return 0;
> +
> + set_bit(EXTENT_BUFFER_READAHEAD, &buf->bflags);
> +
> + ret = read_extent_buffer_pages(io_tree, buf, 0, 0, 1, btree_get_extent,
> + mirror_num);
This patch doesn't compile for me, it says there are too many arguments here.
[root@destiny btrfs-work]# make M=fs/btrfs
CC [M] fs/btrfs/disk-io.o
fs/btrfs/disk-io.c: In function ‘reada_tree_block_flagged’:
fs/btrfs/disk-io.c:963:6: warning: passing argument 5 of ‘read_extent_buffer_pages’ makes pointer from integer without a cast [enabled by default]
fs/btrfs/extent_io.h:244:5: note: expected ‘struct extent_map * (*)(struct inode *, struct page *, size_t, u64, u64, int)’ but argument is of type ‘int’
fs/btrfs/disk-io.c:963:6: warning: passing argument 6 of ‘read_extent_buffer_pages’ makes integer from pointer without a cast [enabled by default]
fs/btrfs/extent_io.h:244:5: note: expected ‘int’ but argument is of type ‘struct extent_map * (*)(struct inode *, struct page *, size_t, u64, u64, int)’
fs/btrfs/disk-io.c:963:6: error: too many arguments to function ‘read_extent_buffer_pages’
fs/btrfs/extent_io.h:244:5: note: declared here
make[1]: *** [fs/btrfs/disk-io.o] Error 1
make: *** [_module_fs/btrfs] Error 2
Thanks,
Josef
--
To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
