[PATCH v3] AOSP: erofs-utils: add block list support
Yue Hu
zbestahu at gmail.com
Thu Jun 24 16:12:09 AEST 2021
On Thu, 24 Jun 2021 02:03:05 -0400
Li GuiFu <bluce.lee at aliyun.com> wrote:
> From: Yue Hu <huyue2 at yulong.com>
>
> Android update engine will treat EROFS filesystem image as one single
> file. Let's add block list support to optimize OTA size.
>
> Signed-off-by: Yue Hu <huyue2 at yulong.com>
> Signed-off-by: Gao Xiang <xiang at kernel.org>
> Signed-off-by: Li Guifu <blucerlee at gmail.com>
> ---
> include/erofs/block_list.h | 27 +++++++++++
> include/erofs/config.h | 1 +
> lib/block_list.c | 91 ++++++++++++++++++++++++++++++++++++++
> lib/compress.c | 2 +
> lib/inode.c | 6 +++
> mkfs/main.c | 14 ++++++
> 6 files changed, 141 insertions(+)
> create mode 100644 include/erofs/block_list.h
> create mode 100644 lib/block_list.c
>
> diff --git a/include/erofs/block_list.h b/include/erofs/block_list.h
> new file mode 100644
> index 0000000..7756d8a
> --- /dev/null
> +++ b/include/erofs/block_list.h
> @@ -0,0 +1,27 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * erofs-utils/include/erofs/block_list.h
> + *
> + * Copyright (C), 2021, Coolpad Group Limited.
> + * Created by Yue Hu <huyue2 at yulong.com>
> + */
> +#ifndef __EROFS_BLOCK_LIST_H
> +#define __EROFS_BLOCK_LIST_H
> +
> +#include "internal.h"
> +
> +#ifdef WITH_ANDROID
> +int erofs_droid_blocklist_fopen(void);
> +void erofs_droid_blocklist_fclose(void);
> +void erofs_droid_blocklist_write(struct erofs_inode *inode,
> + erofs_blk_t blk_start, erofs_blk_t nblocks);
> +void erofs_droid_blocklist_write_tail_end(struct erofs_inode *inode,
> + erofs_blk_t blkaddr);
> +#else
> +static inline void erofs_droid_blocklist_write(struct erofs_inode *inode,
> + erofs_blk_t blk_start, erofs_blk_t nblocks) {}
> +static inline
> +void erofs_droid_blocklist_write_tail_end(struct erofs_inode *inode,
> + erofs_blk_t blkaddr) {}
> +#endif
> +#endif
> diff --git a/include/erofs/config.h b/include/erofs/config.h
> index d140a73..67e7a0f 100644
> --- a/include/erofs/config.h
> +++ b/include/erofs/config.h
> @@ -65,6 +65,7 @@ struct erofs_configure {
> char *mount_point;
> char *target_out_path;
> char *fs_config_file;
> + char *block_list_file;
> #endif
> };
>
> diff --git a/lib/block_list.c b/lib/block_list.c
> new file mode 100644
> index 0000000..90fe0fd
> --- /dev/null
> +++ b/lib/block_list.c
> @@ -0,0 +1,91 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * erofs-utils/lib/block_list.c
> + *
> + * Copyright (C), 2021, Coolpad Group Limited.
> + * Created by Yue Hu <huyue2 at yulong.com>
> + */
> +#ifdef WITH_ANDROID
> +#include <stdio.h>
> +#include <sys/stat.h>
> +#include "erofs/block_list.h"
> +
> +#define pr_fmt(fmt) "EROFS block_list: " FUNC_LINE_FMT fmt "\n"
> +#include "erofs/print.h"
> +
> +static FILE *block_list_fp = NULL;
> +
> +int erofs_droid_blocklist_fopen(void)
> +{
> + if (block_list_fp)
> + return 0;
> +
> + block_list_fp = fopen(cfg.block_list_file, "w");
> +
> + if (!block_list_fp)
> + return -1;
> + return 0;
> +}
> +
> +void erofs_droid_blocklist_fclose(void)
> +{
> + if (!block_list_fp)
> + return;
> +
> + fclose(block_list_fp);
> + block_list_fp = NULL;
> +}
> +
> +static void blocklist_write(const char *path, erofs_blk_t blk_start,
> + erofs_blk_t nblocks, bool has_tail)
> +{
> + const char *fspath = erofs_fspath(path);
> +
> + fprintf(block_list_fp, "/%s", cfg.mount_point);
> +
> + if (fspath[0] != '/')
> + fprintf(block_list_fp, "/");
> +
> + if (nblocks == 1)
> + fprintf(block_list_fp, "%s %u", fspath, blk_start);
> + else if (nblocks > 1)
> + fprintf(block_list_fp, "%s %u-%u", fspath, blk_start,
> + blk_start + nblocks - 1);
> + else
> + fprintf(block_list_fp, "%s", fspath);
The last else is not needed since nblocks = 0 is not possible.
> +
> + if (!has_tail)
> + fprintf(block_list_fp, "\n");
> +}
> +
> +void erofs_droid_blocklist_write(struct erofs_inode *inode,
> + erofs_blk_t blk_start, erofs_blk_t nblocks)
> +{
> + if (!block_list_fp || !cfg.mount_point || !nblocks)
> + return;
> +
> + blocklist_write(inode->i_srcpath, blk_start, nblocks,
> + !!inode->idata_size);
> +}
> +
> +void erofs_droid_blocklist_write_tail_end(struct erofs_inode *inode,
> + erofs_blk_t blkaddr)
> +{
> + if (!block_list_fp || !cfg.mount_point)
> + return;
> +
> + /* XXX: a bit hacky.. may need a better approach */
> + if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))
> + return;
> +
> + if (erofs_blknr(inode->i_size)) { // its block list has been output before
> + if (blkaddr == NULL_ADDR)
> + fprintf(block_list_fp, "\n");
> + else
> + fprintf(block_list_fp, " %u\n", blkaddr);
> + return;
> + }
> + if (blkaddr != NULL_ADDR)
> + blocklist_write(inode->i_srcpath, blkaddr, 1, false);
> +}
> +#endif
> diff --git a/lib/compress.c b/lib/compress.c
> index 2093bfd..af0c720 100644
> --- a/lib/compress.c
> +++ b/lib/compress.c
> @@ -18,6 +18,7 @@
> #include "erofs/cache.h"
> #include "erofs/compress.h"
> #include "compressor.h"
> +#include "erofs/block_list.h"
>
> static struct erofs_compress compresshandle;
> static int compressionlevel;
> @@ -571,6 +572,7 @@ int erofs_write_compressed_file(struct erofs_inode *inode)
> DBG_BUGON(ret);
> }
> inode->compressmeta = compressmeta;
> + erofs_droid_blocklist_write(inode, blkaddr, compressed_blocks);
> return 0;
>
> err_bdrop:
> diff --git a/lib/inode.c b/lib/inode.c
> index b6108db..97f0cf7 100644
> --- a/lib/inode.c
> +++ b/lib/inode.c
> @@ -21,6 +21,7 @@
> #include "erofs/compress.h"
> #include "erofs/xattr.h"
> #include "erofs/exclude.h"
> +#include "erofs/block_list.h"
>
> #define S_SHIFT 12
> static unsigned char erofs_ftype_by_mode[S_IFMT >> S_SHIFT] = {
> @@ -369,6 +370,7 @@ static int write_uncompressed_file_from_fd(struct erofs_inode *inode, int fd)
> return -EIO;
> }
> }
> + erofs_droid_blocklist_write(inode, inode->u.i_blkaddr, nblocks);
> return 0;
> }
>
> @@ -638,6 +640,8 @@ static int erofs_write_tail_end(struct erofs_inode *inode)
>
> ibh->fsprivate = erofs_igrab(inode);
> ibh->op = &erofs_write_inline_bhops;
> +
> + erofs_droid_blocklist_write_tail_end(inode, NULL_ADDR);
> } else {
> int ret;
> erofs_off_t pos;
> @@ -657,6 +661,8 @@ static int erofs_write_tail_end(struct erofs_inode *inode)
> inode->idata_size = 0;
> free(inode->idata);
> inode->idata = NULL;
> +
> + erofs_droid_blocklist_write_tail_end(inode, erofs_blknr(pos));
> }
> out:
> /* now bh_data can drop directly */
> diff --git a/mkfs/main.c b/mkfs/main.c
> index e476189..28539da 100644
> --- a/mkfs/main.c
> +++ b/mkfs/main.c
> @@ -22,6 +22,7 @@
> #include "erofs/compress.h"
> #include "erofs/xattr.h"
> #include "erofs/exclude.h"
> +#include "erofs/block_list.h"
>
> #ifdef HAVE_LIBUUID
> #include <uuid.h>
> @@ -47,6 +48,7 @@ static struct option long_options[] = {
> {"mount-point", required_argument, NULL, 10},
> {"product-out", required_argument, NULL, 11},
> {"fs-config-file", required_argument, NULL, 12},
> + {"block-list-file", required_argument, NULL, 13},
> #endif
> {0, 0, 0, 0},
> };
> @@ -95,6 +97,7 @@ static void usage(void)
> " --mount-point=X X=prefix of target fs path (default: /)\n"
> " --product-out=X X=product_out directory\n"
> " --fs-config-file=X X=fs_config file\n"
> + " --block-list-file=X X=block_list file\n"
> #endif
> "\nAvailable compressors are: ", stderr);
> print_available_compressors(stderr, ", ");
> @@ -293,6 +296,9 @@ static int mkfs_parse_options_cfg(int argc, char *argv[])
> case 12:
> cfg.fs_config_file = optarg;
> break;
> + case 13:
> + cfg.block_list_file = optarg;
> + break;
> #endif
> case 'C':
> i = strtoull(optarg, &endptr, 0);
> @@ -541,6 +547,11 @@ int main(int argc, char **argv)
> erofs_err("failed to load fs config %s", cfg.fs_config_file);
> return 1;
> }
> +
> + if (cfg.block_list_file && erofs_droid_blocklist_fopen() < 0) {
> + erofs_err("failed to open %s", cfg.block_list_file);
> + return 1;
> + }
> #endif
>
> erofs_show_config();
> @@ -607,6 +618,9 @@ int main(int argc, char **argv)
> err = erofs_mkfs_superblock_csum_set();
> exit:
> z_erofs_compress_exit();
> +#ifdef WITH_ANDROID
> + erofs_droid_blocklist_fclose();
> +#endif
> dev_close();
> erofs_cleanup_exclude_rules();
> erofs_exit_configure();
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