core: change lk-owner as a 1k buffer

so, NLM can send the lk-owner field directly to the locks translators,
while doing the same effort, also enabled sending maximum of 500 aux gid
over protocol.

Change-Id: I87c2514392748416f7ffe21d5154faad2e413969
Signed-off-by: Amar Tumballi <amar@gluster.com>
BUG: 767229
Reviewed-on: http://review.gluster.com/779
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@gluster.com>

8 files changed, 186 insertions, 21 deletions

diff --git a/libglusterfs/src/Makefile.am b/libglusterfs/src/Makefile.am
index 25de376aa..34543f622 100644
--- a/libglusterfs/src/Makefile.am
+++ b/libglusterfs/src/Makefile.am
@@ -37,7 +37,7 @@ noinst_HEADERS = common-utils.h defaults.h dict.h glusterfs.h hashfn.h \
 	rbthash.h iatt.h latency.h mem-types.h $(CONTRIBDIR)/uuid/uuidd.h \
 	$(CONTRIBDIR)/uuid/uuid.h $(CONTRIBDIR)/uuid/uuidP.h \
 	$(CONTRIB_BUILDDIR)/uuid/uuid_types.h syncop.h graph-utils.h trie.h run.h \
-	options.h
+	options.h lkowner.h
 
 EXTRA_DIST = graph.l graph.y
 
diff --git a/libglusterfs/src/common-utils.c b/libglusterfs/src/common-utils.c
index b9f752b75..ce1e1f45b 100644
--- a/libglusterfs/src/common-utils.c
+++ b/libglusterfs/src/common-utils.c
@@ -40,6 +40,7 @@
 #include <netinet/in.h>
 #include <arpa/inet.h>
 #include <signal.h>
+#include <stdlib.h>
 
 #include "logging.h"
 #include "common-utils.h"
@@ -48,6 +49,7 @@
 #include "stack.h"
 #include "globals.h"
 #include "md5.h"
+#include "lkowner.h"
 
 #ifndef AI_ADDRCONFIG
 #define AI_ADDRCONFIG 0
@@ -1656,6 +1658,25 @@ uuid_utoa_r (uuid_t uuid, char *dst)
         return dst;
 }
 
+/*Thread safe conversion function*/
+char *
+lkowner_utoa (gf_lkowner_t *lkowner)
+{
+        char *lkowner_buffer = glusterfs_lkowner_buf_get();
+        lkowner_unparse (lkowner, lkowner_buffer, GF_LKOWNER_BUF_SIZE);
+        return lkowner_buffer;
+}
+
+/*Re-entrant conversion function*/
+char *
+lkowner_utoa_r (gf_lkowner_t *lkowner, char *dst, int len)
+{
+        if(!dst)
+                return NULL;
+        lkowner_unparse (lkowner, dst, len);
+        return dst;
+}
+
 void _get_md5_str (char *out_str, size_t outlen,
                    const uint8_t *input, int n)
 {
diff --git a/libglusterfs/src/common-utils.h b/libglusterfs/src/common-utils.h
index 4e7f981b3..d81da35c5 100644
--- a/libglusterfs/src/common-utils.h
+++ b/libglusterfs/src/common-utils.h
@@ -444,6 +444,9 @@ char valid_internet_address (char *address);
 
 char *uuid_utoa (uuid_t uuid);
 char *uuid_utoa_r (uuid_t uuid, char *dst);
+char *lkowner_utoa (gf_lkowner_t *lkowner);
+char *lkowner_utoa_r (gf_lkowner_t *lkowner, char *dst, int len);
+
 void _get_md5_str (char *out_str, size_t outlen,
                    const uint8_t *input, int n);
 void gf_array_insertionsort (void *a, int l, int r, size_t elem_size,
diff --git a/libglusterfs/src/globals.c b/libglusterfs/src/globals.c
index 57946f704..8b641123f 100644
--- a/libglusterfs/src/globals.c
+++ b/libglusterfs/src/globals.c
@@ -293,6 +293,43 @@ glusterfs_uuid_buf_get ()
         return buf;
 }
 
+/* LKOWNER_BUFFER */
+
+static pthread_key_t lkowner_buf_key;
+static char global_lkowner_buf[GF_LKOWNER_BUF_SIZE];
+void
+glusterfs_lkowner_buf_destroy (void *ptr)
+{
+        if (ptr)
+                FREE (ptr);
+}
+
+int
+glusterfs_lkowner_buf_init ()
+{
+        int ret = 0;
+
+        ret = pthread_key_create (&lkowner_buf_key,
+                                  glusterfs_lkowner_buf_destroy);
+        return ret;
+}
+
+char *
+glusterfs_lkowner_buf_get ()
+{
+        char *buf;
+        int ret = 0;
+
+        buf = pthread_getspecific (lkowner_buf_key);
+        if(!buf) {
+                buf = MALLOC (GF_LKOWNER_BUF_SIZE);
+                ret = pthread_setspecific (lkowner_buf_key, (void *) buf);
+                if(ret)
+                        buf = global_lkowner_buf;
+        }
+        return buf;
+}
+
 int
 glusterfs_globals_init ()
 {
@@ -323,6 +360,13 @@ glusterfs_globals_init ()
                 goto out;
         }
 
+        ret = glusterfs_lkowner_buf_init ();
+        if(ret) {
+                gf_log ("", GF_LOG_CRITICAL,
+                        "ERROR: glusterfs lkowner buffer init failed");
+                goto out;
+        }
+
         gf_mem_acct_enable_set ();
 
         ret = synctask_init ();
diff --git a/libglusterfs/src/globals.h b/libglusterfs/src/globals.h
index 7003351ab..86e1f0324 100644
--- a/libglusterfs/src/globals.h
+++ b/libglusterfs/src/globals.h
@@ -22,12 +22,6 @@
 
 #define GF_DEFAULT_BASE_PORT 24007
 
-/* This corresponds to the max 16 number of group IDs that are sent through an
- * RPC request. Since NFS is the only one going to set this, we can be safe
- * in keeping this size hardcoded.
- */
-#define GF_REQUEST_MAXGROUPS    16
-
 #include "glusterfs.h"
 
 /* CTX */
@@ -52,6 +46,7 @@ int synctask_set (void *);
 
 /* uuid_buf */
 char *glusterfs_uuid_buf_get();
+char *glusterfs_lkowner_buf_get();
 
 /* init */
 int glusterfs_globals_init (void);
diff --git a/libglusterfs/src/glusterfs.h b/libglusterfs/src/glusterfs.h
index 903d2324a..2f68ab741 100644
--- a/libglusterfs/src/glusterfs.h
+++ b/libglusterfs/src/glusterfs.h
@@ -45,7 +45,6 @@
 #include "list.h"
 #include "logging.h"
 
-
 #define GF_YES 1
 #define GF_NO  0
 
@@ -114,6 +113,12 @@
 /* TODO: Should we use PATH-MAX? On some systems it may save space */
 #define ZR_PATH_MAX 4096
 
+/* GlusterFS's maximum supported Auxilary GIDs */
+/* TODO: Keeping it to 200, so that we can fit in 2KB buffer for auth data
+ * in RPC server code, if there is ever need for having more aux-gids, then
+ * we have to add aux-gid in payload of actors */
+#define GF_MAX_AUX_GROUPS   200
+
 /* NOTE: add members ONLY at the end (just before _MAXVALUE) */
 typedef enum {
         GF_FOP_NULL = 0,
@@ -177,15 +182,6 @@ typedef enum {
         GF_OP_TYPE_MAX,
 } gf_op_type_t;
 
-struct gf_flock {
-        short    l_type;
-        short    l_whence;
-        off_t    l_start;
-        off_t    l_len;
-        pid_t    l_pid;
-        uint64_t l_owner;
-};
-
 /* NOTE: all the miscellaneous flags used by GlusterFS should be listed here */
 typedef enum {
         GF_LK_GETLK = 0,
@@ -385,6 +381,19 @@ typedef enum {
         GF_EVENT_MAXVAL,
 } glusterfs_event_t;
 
+/* gf_lkowner_t is defined in lkowner.h */
+#include "lkowner.h"
+
+struct gf_flock {
+        short        l_type;
+        short        l_whence;
+        off_t        l_start;
+        off_t        l_len;
+        pid_t        l_pid;
+        gf_lkowner_t l_owner;
+};
+
+
 extern char *glusterfs_strevent (glusterfs_event_t ev);
 
 #define GF_MUST_CHECK __attribute__((warn_unused_result))
diff --git a/libglusterfs/src/lkowner.h b/libglusterfs/src/lkowner.h
new file mode 100644
index 000000000..5fee17b3d
--- /dev/null
+++ b/libglusterfs/src/lkowner.h
@@ -0,0 +1,92 @@
+/*
+  Copyright (c) 2012 Red Hat <http://www.redhat.com/>
+  This file is part of GlusterFS.
+
+  GlusterFS is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published
+  by the Free Software Foundation; either version 3 of the License,
+  or (at your option) any later version.
+
+  GlusterFS is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see
+  <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef _LK_OWNER_H
+#define _LK_OWNER_H
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#define GF_MAX_LOCK_OWNER_LEN 1024 /* 1kB as per NLM */
+
+/* 16strings-16strings-... */
+#define GF_LKOWNER_BUF_SIZE  ((GF_MAX_LOCK_OWNER_LEN * 2) +     \
+                              (GF_MAX_LOCK_OWNER_LEN / 8))
+
+typedef struct gf_lkowner_ {
+        int  len;
+        char data[GF_MAX_LOCK_OWNER_LEN];
+} gf_lkowner_t;
+
+
+/* LKOWNER to string functions */
+static inline void
+lkowner_unparse (gf_lkowner_t *lkowner, char *buf, int buf_len)
+{
+        int i = 0;
+        int j = 0;
+
+        for (i = 0; i < lkowner->len; i++) {
+                if (i && !(i % 8)) {
+                        buf[j] = '-';
+                        j++;
+                }
+                sprintf (&buf[j], "%02x", lkowner->data[i]);
+                j += 2;
+                if (j == buf_len)
+                        break;
+        }
+        if (j < buf_len)
+                buf[j] = '\0';
+}
+
+static inline void
+set_lk_owner_from_ptr (gf_lkowner_t *lkowner, void *data)
+{
+        int i = 0;
+        int j = 0;
+
+        lkowner->len = sizeof (unsigned long);
+        for (i = 0, j = 0; i < lkowner->len; i++, j += 8) {
+                lkowner->data[i] =  (char)((((unsigned long)data) >> j) & 0xff);
+        }
+}
+
+static inline void
+set_lk_owner_from_uint64 (gf_lkowner_t *lkowner, uint64_t data)
+{
+        int i = 0;
+        int j = 0;
+
+        lkowner->len = 8;
+        for (i = 0, j = 0; i < lkowner->len; i++, j += 8) {
+                lkowner->data[i] =  (char)((data >> j) & 0xff);
+        }
+}
+
+/* Return true if the locks have the same owner */
+static inline int
+is_same_lkowner (gf_lkowner_t *l1, gf_lkowner_t *l2)
+{
+        return ((l1->len == l2->len) && !memcmp(l1->data, l2->data, l1->len));
+}
+
+#endif /* _LK_OWNER_H */
diff --git a/libglusterfs/src/stack.h b/libglusterfs/src/stack.h
index 546e2f968..a5689e096 100644
--- a/libglusterfs/src/stack.h
+++ b/libglusterfs/src/stack.h
@@ -44,6 +44,7 @@ typedef struct _call_pool_t call_pool_t;
 #include "list.h"
 #include "common-utils.h"
 #include "globals.h"
+#include "lkowner.h"
 
 #define NFS_PID 1
 #define LOW_PRIO_PROC_PID -1
@@ -106,9 +107,9 @@ struct _call_stack_t {
         uid_t                         uid;
         gid_t                         gid;
         pid_t                         pid;
-        uint32_t                      ngrps;
-        uint32_t                      groups[GF_REQUEST_MAXGROUPS];
-        uint64_t                      lk_owner;
+        uint16_t                      ngrps;
+        uint32_t                      groups[GF_MAX_AUX_GROUPS];
+        gf_lkowner_t                  lk_owner;
 
         call_frame_t                  frames;
 
@@ -360,7 +361,7 @@ copy_frame (call_frame_t *frame)
         newstack->op  = oldstack->op;
         newstack->type = oldstack->type;
         memcpy (newstack->groups, oldstack->groups,
-                sizeof (uint32_t) * GF_REQUEST_MAXGROUPS);
+                sizeof (gid_t) * GF_MAX_AUX_GROUPS);
         newstack->unique = oldstack->unique;
 
         newstack->frames.this = frame->this;