[PATCH] Verify that the written pattern is read back

diff --git a/verify.c b/verify.c
index fadf1c0..e97d7c6 100644
--- a/verify.c
+++ b/verify.c
@@ -344,10 +344,32 @@ static int verify_io_u_md5(struct verify
         return 0;
 }
 
+int verify_io_u_pattern(unsigned long pattern, unsigned long pattern_size,
+ char* buf, unsigned int len, unsigned int mod)
+{
+ unsigned int i;
+ char split_pattern[4];
+
+ for (i = 0; i < 4; i++) {
+ split_pattern[i] = pattern & 0xff;
+ pattern >>= 8;
+ }
+
+ for (i = 0; i < len; i++) {
+ if (buf[i] != split_pattern[mod])
+ return 1;
+ mod++;
+ if (mod == pattern_size)
+ mod = 0;
+ }
+
+ return 0;
+}
+
 int verify_io_u(struct thread_data *td, struct io_u *io_u)
 {
         struct verify_header *hdr;
- unsigned int hdr_inc, hdr_num = 0;
+ unsigned int hdr_size, hdr_inc, hdr_num = 0;
         void *p;
         int ret = 0;
 
@@ -359,11 +381,25 @@ int verify_io_u(struct thread_data *td,
                 hdr_inc = td->o.verify_interval;
 
         for (p = io_u->buf; p < io_u->buf + io_u->buflen; p += hdr_inc) {
+ hdr_size = __hdr_size(td->o.verify);
                 if (td->o.verify_offset)
- memswp(p, p + td->o.verify_offset, __hdr_size(td->o.verify));
-
+ memswp(p, p + td->o.verify_offset, hdr_size);
                 hdr = p;
 
+ if (td->o.verify_pattern_bytes) {
+ ret = verify_io_u_pattern(td->o.verify_pattern,
+ td->o.verify_pattern_bytes,
+ p + hdr_size,
+ hdr_inc - hdr_size,
+ hdr_size % 4);
+ if (ret) {
+ log_err("pattern: verify failed at %llu/%u\n",
+ io_u->offset + hdr_num * hdr->len,
+ hdr->len);
+ return ret;
+ }
+ }
+
                 if (hdr->fio_magic != FIO_HDR_MAGIC) {
                         log_err("Bad verify header %x\n", hdr->fio_magic);
                         return EIO;
Received on Thu Aug 02 2007 - 03:21:43 CEST