[SCSI] zfcp: Introduce a helper function that dumps hex data to a zfcp trace.

Signed-off-by: Martin Peschke <mp3@de.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/drivers/s390/scsi/zfcp_dbf.c b/drivers/s390/scsi/zfcp_dbf.c
index 701046c9bb33..0faadb0cda24 100644
--- a/drivers/s390/scsi/zfcp_dbf.c
+++ b/drivers/s390/scsi/zfcp_dbf.c
@@ -31,6 +31,24 @@ MODULE_PARM_DESC(dbfsize,
 
 #define ZFCP_LOG_AREA                   ZFCP_LOG_AREA_OTHER
 
+static void zfcp_dbf_hexdump(debug_info_t *dbf, void *to, int to_len,
+                             int level, char *from, int from_len)
+{
+        int offset;
+        struct zfcp_dbf_dump *dump = to;
+        int room = to_len - sizeof(*dump);
+
+        for (offset = 0; offset < from_len; offset += dump->size) {
+                memset(to, 0, to_len);
+                strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
+                dump->total_size = from_len;
+                dump->offset = offset;
+                dump->size = min(from_len - offset, room);
+                memcpy(dump->data, from + offset, dump->size);
+                debug_event(dbf, level, dump, dump->size);
+        }
+}
+
 static int
 zfcp_dbf_stck(char *out_buf, const char *label, unsigned long long stck)
 {