Add option -e to show file extents info, this option needs specify nid as well. (eg. dump.erofs --nid # -e erofs.img)
Signed-off-by: Guo Xuenan <[email protected]> Signed-off-by: Wang Qi <[email protected]> --- dump/main.c | 50 +++++++++++++++++++++++++++++++++++++--- include/erofs/internal.h | 2 ++ lib/data.c | 4 ++-- 3 files changed, 51 insertions(+), 5 deletions(-) diff --git a/dump/main.c b/dump/main.c index 78e952e..4acb742 100644 --- a/dump/main.c +++ b/dump/main.c @@ -18,6 +18,7 @@ struct erofsdump_cfg { unsigned int totalshow; bool show_inode; + bool show_extent; bool show_superblock; bool show_statistics; erofs_nid_t nid; @@ -94,6 +95,7 @@ static void usage(void) fputs("usage: [options] IMAGE\n\n" "Dump erofs layout from IMAGE, and [options] are:\n" " -V print the version number of dump.erofs and exit.\n" + " -e show extent info (require --nid set)\n" " -s show information about superblock\n" " -S show statistic information of the image\n" " --nid=# show the target inode info of nid #\n" @@ -110,9 +112,13 @@ static int erofsdump_parse_options_cfg(int argc, char **argv) { int opt; - while ((opt = getopt_long(argc, argv, "SV:s", + while ((opt = getopt_long(argc, argv, "SVes", long_options, NULL)) != -1) { switch (opt) { + case 'e': + dumpcfg.show_extent = true; + ++dumpcfg.totalshow; + break; case 's': dumpcfg.show_superblock = true; ++dumpcfg.totalshow; @@ -407,7 +413,15 @@ static int erofs_get_pathname(erofs_nid_t nid, erofs_nid_t parent_nid, return -1; } -static void erofsdump_show_fileinfo(void) +static int erofsdump_map_blocks(struct erofs_inode *inode, + struct erofs_map_blocks *map, int flags) +{ + if (erofs_inode_is_data_compressed(inode->datalayout)) + return z_erofs_map_blocks_iter(inode, map, flags); + return erofs_map_blocks(inode, map, flags); +} + +static void erofsdump_show_fileinfo(bool show_extent) { int err; erofs_off_t size; @@ -419,6 +433,11 @@ static void erofsdump_show_fileinfo(void) char path[PATH_MAX + 1] = {0}; char access_mode_str[] = "rwxrwxrwx"; char timebuf[128] = {0}; + unsigned int extent_count = 0; + struct erofs_map_blocks map = { + .index = UINT_MAX, + .m_la = 0, + }; err = erofs_read_inode_from_disk(&inode); if (err) { @@ -460,6 +479,26 @@ static void erofsdump_show_fileinfo(void) fprintf(stdout, "Uid: %u Gid: %u ", inode.i_uid, inode.i_gid); fprintf(stdout, "Access: %04o/%s\n", access_mode, access_mode_str); fprintf(stdout, "Timestamp: %s.%09d\n", timebuf, time_nsec); + + if (!dumpcfg.show_extent) + return; + + fprintf(stdout, "\nExt: logical_offset/length: physical_offset/length\n"); + while (map.m_la < inode.i_size) { + err = erofsdump_map_blocks(&inode, &map, + EROFS_GET_BLOCKS_FIEMAP); + if (err) { + erofs_err("get file blocks range failed"); + return; + } + fprintf(stdout, "%u: ", extent_count++); + fprintf(stdout, "%6lu..%-6lu / %-lu: ", + map.m_la, map.m_la + map.m_llen, map.m_llen); + fprintf(stdout, "%lu..%lu / %-lu\n", + map.m_pa, map.m_pa + map.m_plen, map.m_plen); + map.m_la += map.m_llen; + } + fprintf(stdout, "%s:%d extents found\n", cfg.c_img_path, extent_count); } static void erofsdump_print_chart_row(char *col1, unsigned int col2, @@ -643,8 +682,13 @@ int main(int argc, char **argv) if (dumpcfg.show_statistics) erofsdump_print_statistic(); + if (dumpcfg.show_extent && !dumpcfg.show_inode) { + usage(); + goto exit; + } + if (dumpcfg.show_inode) - erofsdump_show_fileinfo(); + erofsdump_show_fileinfo(dumpcfg.show_extent); exit: erofs_exit_configure(); diff --git a/include/erofs/internal.h b/include/erofs/internal.h index 139656c..8282f03 100644 --- a/include/erofs/internal.h +++ b/include/erofs/internal.h @@ -275,6 +275,8 @@ int erofs_ilookup(const char *path, struct erofs_inode *vi); /* data.c */ int erofs_pread(struct erofs_inode *inode, char *buf, erofs_off_t count, erofs_off_t offset); +int erofs_map_blocks(struct erofs_inode *inode, + struct erofs_map_blocks *map, int flags); /* zmap.c */ int z_erofs_fill_inode(struct erofs_inode *vi); int z_erofs_map_blocks_iter(struct erofs_inode *vi, diff --git a/lib/data.c b/lib/data.c index 30e7312..9048707 100644 --- a/lib/data.c +++ b/lib/data.c @@ -61,8 +61,8 @@ err_out: return err; } -static int erofs_map_blocks(struct erofs_inode *inode, - struct erofs_map_blocks *map, int flags) +int erofs_map_blocks(struct erofs_inode *inode, + struct erofs_map_blocks *map, int flags) { struct erofs_inode *vi = inode; struct erofs_inode_chunk_index *idx; -- 2.31.1
