INIT_LIST_HEAD(&sma->pending_const);
INIT_LIST_HEAD(&sma->list_id);
sma->sem_nsems = nsems;
- sma->sem_ctime = get_seconds();
+ sma->sem_ctime = ktime_get_real_seconds();
retval = ipc_addid(&sem_ids(ns), &sma->sem_perm, ns->sc_semmni);
if (retval < 0) {
}
}
-static time_t get_semotime(struct sem_array *sma)
+static time64_t get_semotime(struct sem_array *sma)
{
int i;
- time_t res;
+ time64_t res;
res = sma->sems[0].sem_otime;
for (i = 1; i < sma->sem_nsems; i++) {
- time_t to = sma->sems[i].sem_otime;
+ time64_t to = sma->sems[i].sem_otime;
if (to > res)
res = to;
return res;
}
-static int semctl_nolock(struct ipc_namespace *ns, int semid,
- int cmd, int version, void __user *p)
+static int semctl_stat(struct ipc_namespace *ns, int semid,
+ int cmd, struct semid64_ds *semid64)
{
- int err;
struct sem_array *sma;
+ int id = 0;
+ int err;
- switch (cmd) {
- case IPC_INFO:
- case SEM_INFO:
- {
- struct seminfo seminfo;
- int max_id;
-
- err = security_sem_semctl(NULL, cmd);
- if (err)
- return err;
+ memset(semid64, 0, sizeof(*semid64));
- memset(&seminfo, 0, sizeof(seminfo));
- seminfo.semmni = ns->sc_semmni;
- seminfo.semmns = ns->sc_semmns;
- seminfo.semmsl = ns->sc_semmsl;
- seminfo.semopm = ns->sc_semopm;
- seminfo.semvmx = SEMVMX;
- seminfo.semmnu = SEMMNU;
- seminfo.semmap = SEMMAP;
- seminfo.semume = SEMUME;
- down_read(&sem_ids(ns).rwsem);
- if (cmd == SEM_INFO) {
- seminfo.semusz = sem_ids(ns).in_use;
- seminfo.semaem = ns->used_sems;
- } else {
- seminfo.semusz = SEMUSZ;
- seminfo.semaem = SEMAEM;
+ rcu_read_lock();
+ if (cmd == SEM_STAT) {
+ sma = sem_obtain_object(ns, semid);
+ if (IS_ERR(sma)) {
+ err = PTR_ERR(sma);
+ goto out_unlock;
+ }
+ id = sma->sem_perm.id;
+ } else {
+ sma = sem_obtain_object_check(ns, semid);
+ if (IS_ERR(sma)) {
+ err = PTR_ERR(sma);
+ goto out_unlock;
}
- max_id = ipc_get_maxid(&sem_ids(ns));
- up_read(&sem_ids(ns).rwsem);
- if (copy_to_user(p, &seminfo, sizeof(struct seminfo)))
- return -EFAULT;
- return (max_id < 0) ? 0 : max_id;
}
- case IPC_STAT:
- case SEM_STAT:
- {
- struct semid64_ds tbuf;
- int id = 0;
-
- memset(&tbuf, 0, sizeof(tbuf));
- rcu_read_lock();
- if (cmd == SEM_STAT) {
- sma = sem_obtain_object(ns, semid);
- if (IS_ERR(sma)) {
- err = PTR_ERR(sma);
- goto out_unlock;
- }
- id = sma->sem_perm.id;
- } else {
- sma = sem_obtain_object_check(ns, semid);
- if (IS_ERR(sma)) {
- err = PTR_ERR(sma);
- goto out_unlock;
- }
- }
+ err = -EACCES;
+ if (ipcperms(ns, &sma->sem_perm, S_IRUGO))
+ goto out_unlock;
- err = -EACCES;
- if (ipcperms(ns, &sma->sem_perm, S_IRUGO))
- goto out_unlock;
+ err = security_sem_semctl(sma, cmd);
+ if (err)
+ goto out_unlock;
- err = security_sem_semctl(sma, cmd);
- if (err)
- goto out_unlock;
+ kernel_to_ipc64_perm(&sma->sem_perm, &semid64->sem_perm);
+ semid64->sem_otime = get_semotime(sma);
+ semid64->sem_ctime = sma->sem_ctime;
+ semid64->sem_nsems = sma->sem_nsems;
+ rcu_read_unlock();
+ return id;
- kernel_to_ipc64_perm(&sma->sem_perm, &tbuf.sem_perm);
- tbuf.sem_otime = get_semotime(sma);
- tbuf.sem_ctime = sma->sem_ctime;
- tbuf.sem_nsems = sma->sem_nsems;
- rcu_read_unlock();
- if (copy_semid_to_user(p, &tbuf, version))
- return -EFAULT;
- return id;
- }
- default:
- return -EINVAL;
- }
out_unlock:
rcu_read_unlock();
return err;
}
+static int semctl_info(struct ipc_namespace *ns, int semid,
+ int cmd, void __user *p)
+{
+ struct seminfo seminfo;
+ int max_id;
+ int err;
+
+ err = security_sem_semctl(NULL, cmd);
+ if (err)
+ return err;
+
+ memset(&seminfo, 0, sizeof(seminfo));
+ seminfo.semmni = ns->sc_semmni;
+ seminfo.semmns = ns->sc_semmns;
+ seminfo.semmsl = ns->sc_semmsl;
+ seminfo.semopm = ns->sc_semopm;
+ seminfo.semvmx = SEMVMX;
+ seminfo.semmnu = SEMMNU;
+ seminfo.semmap = SEMMAP;
+ seminfo.semume = SEMUME;
+ down_read(&sem_ids(ns).rwsem);
+ if (cmd == SEM_INFO) {
+ seminfo.semusz = sem_ids(ns).in_use;
+ seminfo.semaem = ns->used_sems;
+ } else {
+ seminfo.semusz = SEMUSZ;
+ seminfo.semaem = SEMAEM;
+ }
+ max_id = ipc_get_maxid(&sem_ids(ns));
+ up_read(&sem_ids(ns).rwsem);
+ if (copy_to_user(p, &seminfo, sizeof(struct seminfo)))
+ return -EFAULT;
+ return (max_id < 0) ? 0 : max_id;
+}
+
static int semctl_setval(struct ipc_namespace *ns, int semid, int semnum,
- unsigned long arg)
+ int val)
{
struct sem_undo *un;
struct sem_array *sma;
struct sem *curr;
- int err, val;
+ int err;
DEFINE_WAKE_Q(wake_q);
-#if defined(CONFIG_64BIT) && defined(__BIG_ENDIAN)
- /* big-endian 64bit */
- val = arg >> 32;
-#else
- /* 32bit or little-endian 64bit */
- val = arg;
-#endif
-
if (val > SEMVMX || val < 0)
return -ERANGE;
curr->semval = val;
curr->sempid = task_tgid_vnr(current);
- sma->sem_ctime = get_seconds();
+ sma->sem_ctime = ktime_get_real_seconds();
/* maybe some queued-up processes were waiting for this */
do_smart_update(sma, NULL, 0, 0, &wake_q);
sem_unlock(sma, -1);
for (i = 0; i < nsems; i++)
un->semadj[i] = 0;
}
- sma->sem_ctime = get_seconds();
+ sma->sem_ctime = ktime_get_real_seconds();
/* maybe some queued-up processes were waiting for this */
do_smart_update(sma, NULL, 0, 0, &wake_q);
err = 0;
* NOTE: no locks must be held, the rwsem is taken inside this function.
*/
static int semctl_down(struct ipc_namespace *ns, int semid,
- int cmd, int version, void __user *p)
+ int cmd, struct semid64_ds *semid64)
{
struct sem_array *sma;
int err;
- struct semid64_ds semid64;
struct kern_ipc_perm *ipcp;
- if (cmd == IPC_SET) {
- if (copy_semid_from_user(&semid64, p, version))
- return -EFAULT;
- }
-
down_write(&sem_ids(ns).rwsem);
rcu_read_lock();
ipcp = ipcctl_pre_down_nolock(ns, &sem_ids(ns), semid, cmd,
- &semid64.sem_perm, 0);
+ &semid64->sem_perm, 0);
if (IS_ERR(ipcp)) {
err = PTR_ERR(ipcp);
goto out_unlock1;
goto out_up;
case IPC_SET:
sem_lock(sma, NULL, -1);
- err = ipc_update_perm(&semid64.sem_perm, ipcp);
+ err = ipc_update_perm(&semid64->sem_perm, ipcp);
if (err)
goto out_unlock0;
- sma->sem_ctime = get_seconds();
+ sma->sem_ctime = ktime_get_real_seconds();
break;
default:
err = -EINVAL;
int version;
struct ipc_namespace *ns;
void __user *p = (void __user *)arg;
+ struct semid64_ds semid64;
+ int err;
if (semid < 0)
return -EINVAL;
switch (cmd) {
case IPC_INFO:
case SEM_INFO:
+ return semctl_info(ns, semid, cmd, p);
case IPC_STAT:
case SEM_STAT:
- return semctl_nolock(ns, semid, cmd, version, p);
+ err = semctl_stat(ns, semid, cmd, &semid64);
+ if (err < 0)
+ return err;
+ if (copy_semid_to_user(p, &semid64, version))
+ err = -EFAULT;
+ return err;
case GETALL:
case GETVAL:
case GETPID:
case GETNCNT:
case GETZCNT:
+ case SETALL:
+ return semctl_main(ns, semid, semnum, cmd, p);
+ case SETVAL: {
+ int val;
+#if defined(CONFIG_64BIT) && defined(__BIG_ENDIAN)
+ /* big-endian 64bit */
+ val = arg >> 32;
+#else
+ /* 32bit or little-endian 64bit */
+ val = arg;
+#endif
+ return semctl_setval(ns, semid, semnum, val);
+ }
+ case IPC_SET:
+ if (copy_semid_from_user(&semid64, p, version))
+ return -EFAULT;
+ case IPC_RMID:
+ return semctl_down(ns, semid, cmd, &semid64);
+ default:
+ return -EINVAL;
+ }
+}
+
+#ifdef CONFIG_COMPAT
+
+struct compat_semid_ds {
+ struct compat_ipc_perm sem_perm;
+ compat_time_t sem_otime;
+ compat_time_t sem_ctime;
+ compat_uptr_t sem_base;
+ compat_uptr_t sem_pending;
+ compat_uptr_t sem_pending_last;
+ compat_uptr_t undo;
+ unsigned short sem_nsems;
+};
+
+static int copy_compat_semid_from_user(struct semid64_ds *out, void __user *buf,
+ int version)
+{
+ memset(out, 0, sizeof(*out));
+ if (version == IPC_64) {
+ struct compat_semid64_ds *p = buf;
+ return get_compat_ipc64_perm(&out->sem_perm, &p->sem_perm);
+ } else {
+ struct compat_semid_ds *p = buf;
+ return get_compat_ipc_perm(&out->sem_perm, &p->sem_perm);
+ }
+}
+
+static int copy_compat_semid_to_user(void __user *buf, struct semid64_ds *in,
+ int version)
+{
+ if (version == IPC_64) {
+ struct compat_semid64_ds v;
+ memset(&v, 0, sizeof(v));
+ to_compat_ipc64_perm(&v.sem_perm, &in->sem_perm);
+ v.sem_otime = in->sem_otime;
+ v.sem_ctime = in->sem_ctime;
+ v.sem_nsems = in->sem_nsems;
+ return copy_to_user(buf, &v, sizeof(v));
+ } else {
+ struct compat_semid_ds v;
+ memset(&v, 0, sizeof(v));
+ to_compat_ipc_perm(&v.sem_perm, &in->sem_perm);
+ v.sem_otime = in->sem_otime;
+ v.sem_ctime = in->sem_ctime;
+ v.sem_nsems = in->sem_nsems;
+ return copy_to_user(buf, &v, sizeof(v));
+ }
+}
+
+COMPAT_SYSCALL_DEFINE4(semctl, int, semid, int, semnum, int, cmd, int, arg)
+{
+ void __user *p = compat_ptr(arg);
+ struct ipc_namespace *ns;
+ struct semid64_ds semid64;
+ int version = compat_ipc_parse_version(&cmd);
+ int err;
+
+ ns = current->nsproxy->ipc_ns;
+
+ if (semid < 0)
+ return -EINVAL;
+
+ switch (cmd & (~IPC_64)) {
+ case IPC_INFO:
+ case SEM_INFO:
+ return semctl_info(ns, semid, cmd, p);
+ case IPC_STAT:
+ case SEM_STAT:
+ err = semctl_stat(ns, semid, cmd, &semid64);
+ if (err < 0)
+ return err;
+ if (copy_compat_semid_to_user(p, &semid64, version))
+ err = -EFAULT;
+ return err;
+ case GETVAL:
+ case GETPID:
+ case GETNCNT:
+ case GETZCNT:
+ case GETALL:
case SETALL:
return semctl_main(ns, semid, semnum, cmd, p);
case SETVAL:
return semctl_setval(ns, semid, semnum, arg);
- case IPC_RMID:
case IPC_SET:
- return semctl_down(ns, semid, cmd, version, p);
+ if (copy_compat_semid_from_user(&semid64, p, version))
+ return -EFAULT;
+ /* fallthru */
+ case IPC_RMID:
+ return semctl_down(ns, semid, cmd, &semid64);
default:
return -EINVAL;
}
}
+#endif
/* If the task doesn't already have a undo_list, then allocate one
* here. We guarantee there is only one thread using this undo list,
return un;
}
-SYSCALL_DEFINE4(semtimedop, int, semid, struct sembuf __user *, tsops,
- unsigned, nsops, const struct timespec __user *, timeout)
+static long do_semtimedop(int semid, struct sembuf __user *tsops,
+ unsigned nsops, const struct timespec64 *timeout)
{
int error = -EINVAL;
struct sem_array *sma;
}
if (timeout) {
- struct timespec _timeout;
- if (copy_from_user(&_timeout, timeout, sizeof(*timeout))) {
- error = -EFAULT;
- goto out_free;
- }
- if (_timeout.tv_sec < 0 || _timeout.tv_nsec < 0 ||
- _timeout.tv_nsec >= 1000000000L) {
+ if (timeout->tv_sec < 0 || timeout->tv_nsec < 0 ||
+ timeout->tv_nsec >= 1000000000L) {
error = -EINVAL;
goto out_free;
}
- jiffies_left = timespec_to_jiffies(&_timeout);
+ jiffies_left = timespec64_to_jiffies(timeout);
}
max = 0;
return error;
}
+SYSCALL_DEFINE4(semtimedop, int, semid, struct sembuf __user *, tsops,
+ unsigned, nsops, const struct timespec __user *, timeout)
+{
+ if (timeout) {
+ struct timespec64 ts;
+ if (get_timespec64(&ts, timeout))
+ return -EFAULT;
+ return do_semtimedop(semid, tsops, nsops, &ts);
+ }
+ return do_semtimedop(semid, tsops, nsops, NULL);
+}
+
+#ifdef CONFIG_COMPAT
+COMPAT_SYSCALL_DEFINE4(semtimedop, int, semid, struct sembuf __user *, tsems,
+ unsigned, nsops,
+ const struct compat_timespec __user *, timeout)
+{
+ if (timeout) {
+ struct timespec64 ts;
+ if (compat_get_timespec64(&ts, timeout))
+ return -EFAULT;
+ return do_semtimedop(semid, tsems, nsops, &ts);
+ }
+ return do_semtimedop(semid, tsems, nsops, NULL);
+}
+#endif
+
SYSCALL_DEFINE3(semop, int, semid, struct sembuf __user *, tsops,
unsigned, nsops)
{
- return sys_semtimedop(semid, tsops, nsops, NULL);
+ return do_semtimedop(semid, tsops, nsops, NULL);
}
/* If CLONE_SYSVSEM is set, establish sharing of SEM_UNDO state between
struct user_namespace *user_ns = seq_user_ns(s);
struct kern_ipc_perm *ipcp = it;
struct sem_array *sma = container_of(ipcp, struct sem_array, sem_perm);
- time_t sem_otime;
+ time64_t sem_otime;
/*
* The proc interface isn't aware of sem_lock(), it calls
sem_otime = get_semotime(sma);
seq_printf(s,
- "%10d %10d %4o %10u %5u %5u %5u %5u %10lu %10lu\n",
+ "%10d %10d %4o %10u %5u %5u %5u %5u %10llu %10llu\n",
sma->sem_perm.key,
sma->sem_perm.id,
sma->sem_perm.mode,
git.samba.org / sfrench / cifs-2.6.git / blobdiff