[PATCH] erofs-utils: dump: fix de->nid issues

[Gao Xiang]

As David Michael reported, "
    In file included from main.c:11:
    main.c: In function 'erofs_checkdirent':
    ../include/erofs/print.h:68:25: error: format '%llu' expects argument of type 'long long unsigned int', but argument 3 has type '__le64' {aka 'long unsigned int'} [-Werror=format=]
       68 |                         "<E> " PR_FMT_FUNC_LINE(fmt),   \
          |                         ^~~~~~
    main.c:264:17: note: in expansion of macro 'erofs_err'
      264 |                 erofs_err("invalid file type %llu", de->nid);
          |                 ^~~~~~~~~
    main.c: In function 'erofs_read_dirent':
    ../include/erofs/print.h:68:25: error: format '%llu' expects argument of type 'long long unsigned int', but argument 3 has type '__le64' {aka 'long unsigned int'} [-Werror=format=]
       68 |                         "<E> " PR_FMT_FUNC_LINE(fmt),   \
          |                         ^~~~~~
    main.c:303:25: note: in expansion of macro 'erofs_err'
      303 |                         erofs_err("parse dir nid %llu error occurred\n",
          |                         ^~~~~~~~~
    cc1: all warnings being treated as errors
"

Also there are many de->nid lacking of endianness handling.
Should fix them together.

Reported-by: David Michael <fedora.dm0 at gmail.com>
Fixes: cf8be8a4352a ("erofs-utils: dump: add feature for collecting filesystem statistics")
Cc: Wang Qi <mpiglet at outlook.com>
Cc: Guo Xuenan <guoxuenan at huawei.com>
Signed-off-by: Gao Xiang <xiang at kernel.org>
---
Hi David,
Thanks for your report! Please help apply this patch instead.

Hi Xuenan,
Do you have some time cleaning up this part of code? that seems
quite messy to me..

Thanks,
Gao Xiang

 dump/main.c | 31 ++++++++++++++++---------------
 1 file changed, 16 insertions(+), 15 deletions(-)

diff --git a/dump/main.c b/dump/main.c
index b7560eca1080..f85903b059d2 100644
--- a/dump/main.c
+++ b/dump/main.c
@@ -242,11 +242,12 @@ static inline int erofs_checkdirent(struct erofs_dirent *de,
 {
 	int dname_len;
 	unsigned int nameoff = le16_to_cpu(de->nameoff);
+	erofs_nid_t nid = le64_to_cpu(de->nid);
 
 	if (nameoff < sizeof(struct erofs_dirent) ||
 			nameoff >= PAGE_SIZE) {
 		erofs_err("invalid de[0].nameoff %u @ nid %llu",
-				nameoff, de->nid | 0ULL);
+				nameoff, nid | 0ULL);
 		return -EFSCORRUPTED;
 	}
 
@@ -255,13 +256,12 @@ static inline int erofs_checkdirent(struct erofs_dirent *de,
 	/* a corrupted entry is found */
 	if (nameoff + dname_len > maxsize ||
 			dname_len > EROFS_NAME_LEN) {
-		erofs_err("bogus dirent @ nid %llu",
-				le64_to_cpu(de->nid) | 0ULL);
+		erofs_err("bogus dirent @ nid %llu", nid | 0ULL);
 		DBG_BUGON(1);
 		return -EFSCORRUPTED;
 	}
 	if (de->file_type >= EROFS_FT_MAX) {
-		erofs_err("invalid file type %llu", de->nid);
+		erofs_err("invalid file type %llu", nid | 0ULL);
 		return -EFSCORRUPTED;
 	}
 	return dname_len;
@@ -273,7 +273,7 @@ static int erofs_read_dirent(struct erofs_dirent *de,
 {
 	int err;
 	erofs_off_t occupied_size = 0;
-	struct erofs_inode inode = { .nid = de->nid };
+	struct erofs_inode inode = { .nid = le64_to_cpu(de->nid) };
 
 	stats.files++;
 	stats.file_category_stat[de->file_type]++;
@@ -296,12 +296,12 @@ static int erofs_read_dirent(struct erofs_dirent *de,
 		update_file_size_statatics(occupied_size, inode.i_size);
 	}
 
-	if ((de->file_type == EROFS_FT_DIR)
-			&& de->nid != nid && de->nid != parent_nid) {
-		err = erofs_read_dir(de->nid, nid);
+	if (de->file_type == EROFS_FT_DIR && inode.nid != nid &&
+	    inode.nid != parent_nid) {
+		err = erofs_read_dir(inode.nid, nid);
 		if (err) {
 			erofs_err("parse dir nid %llu error occurred\n",
-					de->nid);
+				  inode.nid | 0ULL);
 			return err;
 		}
 	}
@@ -338,7 +338,8 @@ static int erofs_read_dir(erofs_nid_t nid, erofs_nid_t parent_nid)
 			int ret;
 
 			/* skip "." and ".." dentry */
-			if (de->nid == nid || de->nid == parent_nid) {
+			if (le64_to_cpu(de->nid) == nid ||
+			    le64_to_cpu(de->nid) == parent_nid) {
 				de++;
 				continue;
 			}
@@ -399,18 +400,18 @@ static int erofs_get_pathname(erofs_nid_t nid, erofs_nid_t parent_nid,
 			if (len < 0)
 				return len;
 
-			if (de->nid == target) {
+			if (le64_to_cpu(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) {
+			    le64_to_cpu(de->nid) != parent_nid &&
+			    le64_to_cpu(de->nid) != nid) {
 				memcpy(path + pos, dname, len);
-				err = erofs_get_pathname(de->nid, nid,
-						target, path, pos + len);
+				err = erofs_get_pathname(le64_to_cpu(de->nid),
+						nid, target, path, pos + len);
 				if (!err)
 					return 0;
 				memset(path + pos, 0, len);
-- 
2.20.1