cifs: convert to print_hex_dump() instead of custom implementation

This patch converts custom dumper to use native print_hex_dump() instead. The
cifs_dump_mem() will have an offsets per each line which differs it from the
original code.

In the dump_smb() we may use native print_hex_dump() as well. It will show
slightly different output in ASCII part when character is unprintable,
otherwise it keeps same structure.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Steve French <steve.french@primarydata.com>

2 files changed, 4 insertions, 49 deletions

diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c
index 7c50bfa9c438..14e082ff1944 100644
--- a/fs/cifs/cifs_debug.c
+++ b/fs/cifs/cifs_debug.c
@@ -34,27 +34,10 @@
 void
 cifs_dump_mem(char *label, void *data, int length)
 {
-        int i, j;
-        int *intptr = data;
-        char *charptr = data;
-        char buf[10], line[80];
-
         printk(KERN_DEBUG "%s: dump of %d bytes of data at 0x%p\n",
                 label, length, data);
-        for (i = 0; i < length; i += 16) {
-                line[0] = 0;
-                for (j = 0; (j < 4) && (i + j * 4 < length); j++) {
-                        sprintf(buf, " %08x", intptr[i / 4 + j]);
-                        strcat(line, buf);
-                }
-                buf[0] = ' ';
-                buf[2] = 0;
-                for (j = 0; (j < 16) && (i + j < length); j++) {
-                        buf[1] = isprint(charptr[i + j]) ? charptr[i + j] : '.';
-                        strcat(line, buf);
-                }
-                printk(KERN_DEBUG "%s\n", line);
-        }
+        print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
+                       data, length, true);
 }
 
 #ifdef CONFIG_CIFS_DEBUG
diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c
index b7415d596dbd..337946355b29 100644
--- a/fs/cifs/misc.c
+++ b/fs/cifs/misc.c
@@ -513,39 +513,11 @@ is_valid_oplock_break(char *buffer, struct TCP_Server_Info *srv)
 void
 dump_smb(void *buf, int smb_buf_length)
 {
-        int i, j;
-        char debug_line[17];
-        unsigned char *buffer = buf;
-
         if (traceSMB == 0)
                 return;
 
-        for (i = 0, j = 0; i < smb_buf_length; i++, j++) {
-                if (i % 8 == 0) {
-                        /* have reached the beginning of line */
-                        printk(KERN_DEBUG "| ");
-                        j = 0;
-                }
-                printk("%0#4x ", buffer[i]);
-                debug_line[2 * j] = ' ';
-                if (isprint(buffer[i]))
-                        debug_line[1 + (2 * j)] = buffer[i];
-                else
-                        debug_line[1 + (2 * j)] = '_';
-
-                if (i % 8 == 7) {
-                        /* reached end of line, time to print ascii */
-                        debug_line[16] = 0;
-                        printk(" | %s\n", debug_line);
-                }
-        }
-        for (; j < 8; j++) {
-                printk("     ");
-                debug_line[2 * j] = ' ';
-                debug_line[1 + (2 * j)] = ' ';
-        }
-        printk(" | %s\n", debug_line);
-        return;
+        print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_NONE, 8, 2, buf,
+                       smb_buf_length, true);
 }
 
 void