From: Wang Qi <[email protected]> add option --nid to print information of specific nid, including file name/file links/file size/data layout/compression ratio etc..
Signed-off-by: Guo Xuenan <[email protected]> Signed-off-by: Wang Qi <[email protected]> --- dump/main.c | 141 ++++++++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 138 insertions(+), 3 deletions(-) diff --git a/dump/main.c b/dump/main.c index c5e82d1..78e952e 100644 --- a/dump/main.c +++ b/dump/main.c @@ -17,8 +17,10 @@ struct erofsdump_cfg { unsigned int totalshow; + bool show_inode; bool show_superblock; bool show_statistics; + erofs_nid_t nid; }; static struct erofsdump_cfg dumpcfg; @@ -64,7 +66,8 @@ struct erofs_statistics { static struct erofs_statistics stats; static struct option long_options[] = { - {"help", no_argument, 0, 1}, + {"help", no_argument, NULL, 1}, + {"nid", required_argument, NULL, 2}, {0, 0, 0, 0}, }; @@ -82,14 +85,18 @@ static struct erofsdump_feature feature_lists[] = { }; static int erofs_read_dir(erofs_nid_t nid, erofs_nid_t parent_nid); +static inline int erofs_checkdirent(struct erofs_dirent *de, + struct erofs_dirent *last_de, + u32 maxsize, const char *dname); static void usage(void) { fputs("usage: [options] IMAGE\n\n" "Dump erofs layout from IMAGE, and [options] are:\n" - " -S show statistic information of the image\n" " -V print the version number of dump.erofs and exit.\n" " -s show information about superblock\n" + " -S show statistic information of the image\n" + " --nid=# show the target inode info of nid #\n" " --help display this help and exit.\n", stderr); } @@ -103,7 +110,7 @@ static int erofsdump_parse_options_cfg(int argc, char **argv) { int opt; - while ((opt = getopt_long(argc, argv, "SVs", + while ((opt = getopt_long(argc, argv, "SV:s", long_options, NULL)) != -1) { switch (opt) { case 's': @@ -117,6 +124,11 @@ static int erofsdump_parse_options_cfg(int argc, char **argv) case 'V': erofsdump_print_version(); exit(0); + case 2: + dumpcfg.show_inode = true; + dumpcfg.nid = (erofs_nid_t)atoll(optarg); + ++dumpcfg.totalshow; + break; case 1: usage(); exit(0); @@ -330,6 +342,126 @@ static int erofs_read_dir(erofs_nid_t nid, erofs_nid_t parent_nid) return 0; } +static int erofs_get_pathname(erofs_nid_t nid, erofs_nid_t parent_nid, + erofs_nid_t target, char *path, unsigned int pos) +{ + int err; + erofs_off_t offset; + char buf[EROFS_BLKSIZ]; + struct erofs_inode inode = { .nid = nid }; + + path[pos++] = '/'; + if (target == sbi.root_nid) + return 0; + + err = erofs_read_inode_from_disk(&inode); + if (err) { + erofs_err("read inode %lu failed", nid); + return err; + } + + offset = 0; + while (offset < inode.i_size) { + erofs_off_t maxsize = min_t(erofs_off_t, + inode.i_size - offset, EROFS_BLKSIZ); + struct erofs_dirent *de = (void *)buf; + struct erofs_dirent *end; + unsigned int nameoff; + + err = erofs_pread(&inode, buf, maxsize, offset); + if (err) + return err; + + nameoff = le16_to_cpu(de->nameoff); + end = (void *)buf + nameoff; + while (de < end) { + const char *dname; + int len; + + nameoff = le16_to_cpu(de->nameoff); + dname = (char *)buf + nameoff; + len = erofs_checkdirent(de, end, maxsize, dname); + if (len < 0) + return len; + + if (de->nid == target) { + memcpy(path + pos, dname, len); + path[pos + len] = '\0'; + return 0; + } + + if (de->file_type == EROFS_FT_DIR && + de->nid != parent_nid && + de->nid != nid) { + memcpy(path + pos, dname, len); + err = erofs_get_pathname(de->nid, nid, + target, path, pos + len); + if (!err) + return 0; + memset(path + pos, 0, len); + } + ++de; + } + offset += maxsize; + } + return -1; +} + +static void erofsdump_show_fileinfo(void) +{ + int err; + erofs_off_t size; + u16 access_mode; + time_t time_sec; + u32 time_nsec; + erofs_nid_t nid = dumpcfg.nid; + struct erofs_inode inode = { .nid = nid }; + char path[PATH_MAX + 1] = {0}; + char access_mode_str[] = "rwxrwxrwx"; + char timebuf[128] = {0}; + + err = erofs_read_inode_from_disk(&inode); + if (err) { + erofs_err("failed to find inode %lu from disk", nid); + return; + } + + err = erofs_get_occupied_size(&inode, &size); + if (err) { + erofs_err("get file size failed\n"); + return; + } + + err = erofs_get_pathname(sbi.root_nid, sbi.root_nid, nid, path, 0); + if (err < 0) { + fprintf(stderr, "File: Path not found.\n"); + return; + } + + time_sec = inode.i_ctime; + time_nsec = inode.i_ctime_nsec; + strftime(timebuf, sizeof(timebuf), + "%Y-%m-%d %H:%M:%S", localtime(&time_sec)); + access_mode = inode.i_mode & 0777; + for (int i = 8; i >= 0; i--) + if (((access_mode >> i) & 1) == 0) + access_mode_str[8 - i] = '-'; + fprintf(stdout, "File : %s\n", path); + fprintf(stdout, "Inode: %lu ", inode.nid); + fprintf(stdout, "Links: %u ", inode.i_nlink); + fprintf(stdout, "Layout: %d\n", inode.datalayout); + fprintf(stdout, "Inode size: %d ", inode.inode_isize); + fprintf(stdout, "Extent size: %u ", inode.extent_isize); + fprintf(stdout, "Xattr size: %u\n", inode.xattr_isize); + fprintf(stdout, "File size: %lu ", inode.i_size); + fprintf(stdout, "On-disk size: %lu ", size); + fprintf(stdout, "Compression ratio: %.2f%%\n", + (double)(100 * size) / (double)(inode.i_size)); + 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); +} + static void erofsdump_print_chart_row(char *col1, unsigned int col2, double col3, char *col4) { @@ -511,6 +643,9 @@ int main(int argc, char **argv) if (dumpcfg.show_statistics) erofsdump_print_statistic(); + if (dumpcfg.show_inode) + erofsdump_show_fileinfo(); + exit: erofs_exit_configure(); return err; -- 2.31.1
