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e2fsprogs/e2fsprogs-1.39-uuid_duplicates.patch

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Index: e2fsprogs-1.39+1.40_WIP_20061114+PATCH20070329/lib/uuid/Makefile.in
===================================================================
--- e2fsprogs-1.39+1.40_WIP_20061114+PATCH20070329.orig/lib/uuid/Makefile.in
+++ e2fsprogs-1.39+1.40_WIP_20061114+PATCH20070329/lib/uuid/Makefile.in
@@ -19,6 +19,8 @@ SMANPAGES= uuid.3 uuid_clear.3 uuid_comp
OBJS= clear.o \
compare.o \
copy.o \
+ pv.o \
+ shm.o \
gen_uuid.o \
isnull.o \
pack.o \
@@ -30,6 +32,8 @@ OBJS= clear.o \
SRCS= $(srcdir)/clear.c \
$(srcdir)/compare.c \
$(srcdir)/copy.c \
+ $(srcdir)/pv.c \
+ $(srcdir)/shm.c \
$(srcdir)/gen_uuid.c \
$(srcdir)/isnull.c \
$(srcdir)/pack.c \
@@ -82,7 +86,7 @@ tst_uuid: tst_uuid.o $(DEPSTATIC_LIBUUID
uuid_time: $(srcdir)/uuid_time.c $(DEPLIBUUID)
@echo " LD $@"
- @$(CC) $(ALL_CFLAGS) -DDEBUG -o uuid_time $(srcdir)/uuid_time.c \
+ @$(CC) $(ALL_CFLAGS) $(ALL_LDFLAGS) -DDEBUG -o uuid_time $(srcdir)/uuid_time.c \
$(LIBUUID)
uuid.3: $(DEP_SUBSTITUTE) $(srcdir)/uuid.3.in
Index: e2fsprogs-1.39+1.40_WIP_20061114+PATCH20070329/lib/uuid/gen_uuid.c
===================================================================
--- e2fsprogs-1.39+1.40_WIP_20061114+PATCH20070329.orig/lib/uuid/gen_uuid.c
+++ e2fsprogs-1.39+1.40_WIP_20061114+PATCH20070329/lib/uuid/gen_uuid.c
@@ -74,6 +74,10 @@
#endif
#include "uuidP.h"
+#include "pv.h"
+#include "shm.h"
+#include <pthread.h>
+#include <stdio.h>
#ifdef HAVE_SRANDOM
#define srand(x) srandom(x)
@@ -247,54 +251,75 @@ static int get_node_id(unsigned char *no
/* Assume that the gettimeofday() has microsecond granularity */
#define MAX_ADJUSTMENT 10
+static pthread_once_t m_uuid_init_guard = PTHREAD_ONCE_INIT;
+static pthread_mutex_t m_uuid_mutex = PTHREAD_MUTEX_INITIALIZER;
+static int m_uuid_sem_id = -1;
+
+void m_uuid_init_once()
+{
+ m_uuid_sem_id = uuid_sem_init((int)'u');
+}
+
static int get_clock(uint32_t *clock_high, uint32_t *clock_low, uint16_t *ret_clock_seq)
{
- static int adjustment = 0;
- static struct timeval last = {0, 0};
- static uint16_t clock_seq;
- struct timeval tv;
- unsigned long long clock_reg;
-
+ unsigned long long clock_reg;
+ struct timeval tv;
+ static uint16_t clock_seq;
+ static int adjustment = 0;
+
+ int shm_id = shm_init((int)'s', sizeof(struct timeval));
+ struct timeval *clock_time = (struct timeval*)shm_addr(shm_id);
+
try_again:
gettimeofday(&tv, 0);
- if ((last.tv_sec == 0) && (last.tv_usec == 0)) {
+ if ((clock_time->tv_sec == 0) && (clock_time->tv_usec == 0)) {
get_random_bytes(&clock_seq, sizeof(clock_seq));
clock_seq &= 0x3FFF;
- last = tv;
- last.tv_sec--;
+ *clock_time = tv;
+ clock_time->tv_sec--;
}
- if ((tv.tv_sec < last.tv_sec) ||
- ((tv.tv_sec == last.tv_sec) &&
- (tv.tv_usec < last.tv_usec))) {
+ if ((tv.tv_sec < clock_time->tv_sec) ||
+ ((tv.tv_sec == clock_time->tv_sec) &&
+ (tv.tv_usec < clock_time->tv_usec))) {
clock_seq = (clock_seq+1) & 0x3FFF;
adjustment = 0;
- last = tv;
- } else if ((tv.tv_sec == last.tv_sec) &&
- (tv.tv_usec == last.tv_usec)) {
+ *clock_time = tv;
+ } else if ((tv.tv_sec == clock_time->tv_sec) &&
+ (tv.tv_usec == clock_time->tv_usec)) {
if (adjustment >= MAX_ADJUSTMENT)
goto try_again;
adjustment++;
} else {
adjustment = 0;
- last = tv;
+ *clock_time = tv;
}
-
+
+ clock_seq = (clock_seq+1) & 0x3FFF;
+
clock_reg = tv.tv_usec*10 + adjustment;
- clock_reg += ((unsigned long long) tv.tv_sec)*10000000;
- clock_reg += (((unsigned long long) 0x01B21DD2) << 32) + 0x13814000;
-
+ clock_reg += ((unsigned long)tv.tv_sec)*10000000;
+ clock_reg += (((unsigned long long)0x01B21DD2) << 23) + 0x13814000;
+
*clock_high = clock_reg >> 32;
*clock_low = clock_reg;
*ret_clock_seq = clock_seq;
+ shm_detach(clock_time);
return 0;
}
void uuid_generate_time(uuid_t out)
{
+ pthread_mutex_lock(&m_uuid_mutex);
+
+ pthread_once(&m_uuid_init_guard, m_uuid_init_once);
+
+ if(m_uuid_sem_id != -1)
+ uuid_sem_P(m_uuid_sem_id);
+
static unsigned char node_id[6];
static int has_init = 0;
struct uuid uu;
- uint32_t clock_mid;
+ uint32_t clock_mid;
if (!has_init) {
if (get_node_id(node_id) <= 0) {
@@ -314,6 +339,11 @@ void uuid_generate_time(uuid_t out)
uu.time_hi_and_version = ((clock_mid >> 16) & 0x0FFF) | 0x1000;
memcpy(uu.node, node_id, 6);
uuid_pack(&uu, out);
+
+ if(m_uuid_sem_id != -1)
+ uuid_sem_V(m_uuid_sem_id);
+
+ pthread_mutex_unlock(&m_uuid_mutex);
}
void uuid_generate_random(uuid_t out)
Index: e2fsprogs-1.39+1.40_WIP_20061114+PATCH20070329/lib/uuid/pv.c
===================================================================
--- /dev/null
+++ e2fsprogs-1.39+1.40_WIP_20061114+PATCH20070329/lib/uuid/pv.c
@@ -0,0 +1,88 @@
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/sem.h>
+#include <sys/ipc.h>
+
+#if defined(PV_REPORT_VERBOSE)
+#include <stdio.h>
+
+#define report(msg) perror(msg)
+#else
+#define report(msg)
+#endif
+#include <errno.h>
+
+#include "pv.h"
+
+int uuid_sem_init(int project_id)
+{
+ key_t sem_key;
+ int sem_id;
+
+ sem_key = ftok("/", project_id);
+ if(sem_key == (key_t)-1)
+ {
+ report("Can't generate semaphore key");
+ return -1;
+ }
+
+ sem_id = semget(sem_key, 0, 0);
+ if(sem_id == -1)
+ {
+ sem_id = semget(sem_key, 1, IPC_CREAT | IPC_EXCL |
+ S_IRUSR | S_IWUSR | S_IRGRP |
+ S_IWGRP | S_IROTH | S_IWOTH);
+ if(sem_id != -1)
+ {
+ union semun {
+ int val;
+ struct semid_ds *buf;
+ unsigned short *array;
+ struct seminfo *__buf;
+ } arg;
+ arg.val = 1;
+
+ if(semctl(sem_id, 0, SETVAL, arg) == -1)
+ {
+ report("Can't initialize semaphore");
+
+ /* try to remove -- we've created it */
+ semctl(sem_id, 0, IPC_RMID, (int)0);
+ sem_id = -1;
+ }
+ }
+ else
+ if(errno == EEXIST)
+ {
+ if( (sem_id = semget(sem_key, 0, 0)) == -1)
+ {
+ report("Can't acquire / create semahore");
+ }
+ }
+ else
+ {
+ report("Can't neither acquire nor create semahore");
+ }
+ }
+ return sem_id;
+}
+
+static inline int sem_pv(int id, int op)
+{
+ struct sembuf sb;
+ sb.sem_num = 0;
+ sb.sem_op = op;
+ sb.sem_flg = SEM_UNDO;
+ return semop(id, &sb, 1);
+}
+
+int uuid_sem_P(int id)
+{
+ return sem_pv(id, -1);
+}
+
+int uuid_sem_V(int id)
+{
+ return sem_pv(id, 1);
+}
+
Index: e2fsprogs-1.39+1.40_WIP_20061114+PATCH20070329/lib/uuid/pv.h
===================================================================
--- /dev/null
+++ e2fsprogs-1.39+1.40_WIP_20061114+PATCH20070329/lib/uuid/pv.h
@@ -0,0 +1,9 @@
+#ifndef PV_H_INCLUDE_GUARD
+#define PV_H_INCLUDE_GUARD
+
+int uuid_sem_init(int project_id);
+int uuid_sem_P(int id);
+int uuid_sem_V(int id);
+
+#endif // PV_H_INCLUDE_GUARD
+
Index: e2fsprogs-1.39+1.40_WIP_20061114+PATCH20070329/lib/uuid/shm.c
===================================================================
--- /dev/null
+++ e2fsprogs-1.39+1.40_WIP_20061114+PATCH20070329/lib/uuid/shm.c
@@ -0,0 +1,55 @@
+#include <sys/ipc.h>
+#include <sys/types.h>
+#include <sys/shm.h>
+
+#if defined(SHM_REPORT_VERBOSE)
+#include <stdio.h>
+
+#define report(msg) perror(msg)
+#else
+#define report(msg)
+#endif
+#include <errno.h>
+
+#include "shm.h"
+
+int shm_init(int project_id, size_t size) {
+ key_t key;
+ int id;
+
+ key = ftok("/", project_id);
+ if (key == (key_t)-1) {
+ report("Can't generate shared memory key");
+ return -1;
+ }
+
+ id = shmget(key, 0, 0);
+ if (id == -1) {
+ id = shmget(key, size, 0666 | IPC_CREAT);
+ if (id == -1 && errno == EEXIST) {
+ if ((id = shmget(key, 0, 0)) == -1) {
+ report("Can't acquire/create shared memory");
+ }
+ }
+ else if (id == -1) {
+ report("Can neither acquire nor create shared memory");
+ }
+ }
+ return id;
+}
+
+void *shm_addr(int id) {
+ void *p;
+
+ p = shmat(id, NULL, 0);
+ if (p == (void *)-1)
+ report("Cannot attach shared memory");
+ return p;
+}
+
+void shm_detach(void *addr)
+{
+ if (shmdt(addr) == -1)
+ report("Cannot detach shared memory");
+}
+
Index: e2fsprogs-1.39+1.40_WIP_20061114+PATCH20070329/lib/uuid/shm.h
===================================================================
--- /dev/null
+++ e2fsprogs-1.39+1.40_WIP_20061114+PATCH20070329/lib/uuid/shm.h
@@ -0,0 +1,10 @@
+#ifndef SHM_H_INCLUDE_GUARD
+#define SHM_H_INCLUDE_GUARD
+
+#include <stddef.h>
+
+int shm_init(int project_id, size_t size);
+void *shm_addr(int id);
+void shm_detach(void *addr);
+
+#endif // SHM_H_INCLUDE_GUARD
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