The comments of find_cpio_data() says:
* @offset: When a matching file is found, this is the offset to the
* beginning of the cpio. ......
But according to the code,
dptr = PTR_ALIGN(p + ch[C_NAMESIZE], 4);
nptr = PTR_ALIGN(dptr + ch[C_FILESIZE], 4);
....
*offset = (long)nptr - (long)data; /* data is the cpio file */
@offset is the offset of the next file, not the matching file itself.
This is confused and may cause unnecessary waste of time to debug.
So fix it.
Signed-off-by: Tang Chen <tangchen@xxxxxxxxxxxxxx>
---
lib/earlycpio.c | 7 ++++---
1 files changed, 4 insertions(+), 3 deletions(-)
diff --git a/lib/earlycpio.c b/lib/earlycpio.c
index 8078ef4..53ccbf7 100644
--- a/lib/earlycpio.c
+++ b/lib/earlycpio.c
@@ -52,9 +52,10 @@ enum cpio_fields {
* @path: The directory to search for, including a slash at the end
* @data: Pointer to the the cpio archive or a header inside
* @len: Remaining length of the cpio based on data pointer
- * @offset: When a matching file is found, this is the offset to the
- * beginning of the cpio. It can be used to iterate through
- * the cpio to find all files inside of a directory path
+ * @offset: When a matching file is found, this is the offset from the
+ * beginning of the cpio to the beginning of the next file, not the
+ * matching file itself. It can be used to iterate through the cpio
+ * to find all files inside of a directory path
*
* @return: struct cpio_data containing the address, length and
* filename (with the directory path cut off) of the found file.
--
1.7.1
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