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Add skeleton for perf_event_open.

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This commit is contained in:
Ken Sato
2016-02-09 14:54:53 +09:00
parent 14c5bc08c2
commit c0cc6ac6db
5 changed files with 148 additions and 36 deletions
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159
kernel/syscall.c
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@ -2359,34 +2359,85 @@ do_sigaction(int sig, struct k_sigaction *act, struct k_sigaction *oact)
return 0;
}
SYSCALL_DECLARE(read)
{
int fd = ihk_mc_syscall_arg0(ctx);
long rc;
struct thread *thread = cpu_local_var(current);
struct process *proc = thread->proc;
struct mckfd *fdp;
long irqstate;
irqstate = ihk_mc_spinlock_lock(&proc->mckfd_lock);
for(fdp = proc->mckfd; fdp; fdp = fdp->next)
if(fdp->fd == fd)
break;
ihk_mc_spinlock_unlock(&proc->mckfd_lock, irqstate);
if(fdp && fdp->read_cb){
kprintf("read: found system fd %d\n", fd);
rc = fdp->read_cb(fdp, ctx);
}
else{
rc = syscall_generic_forwarding(__NR_read, ctx);
}
return rc;
}
SYSCALL_DECLARE(ioctl)
{
int fd = ihk_mc_syscall_arg0(ctx);
long rc;
struct thread *thread = cpu_local_var(current);
struct process *proc = thread->proc;
struct mckfd *fdp;
long irqstate;
irqstate = ihk_mc_spinlock_lock(&proc->mckfd_lock);
for(fdp = proc->mckfd; fdp; fdp = fdp->next)
if(fdp->fd == fd)
break;
ihk_mc_spinlock_unlock(&proc->mckfd_lock, irqstate);
if(fdp && fdp->ioctl_cb){
kprintf("ioctl: found system fd %d\n", fd);
rc = fdp->ioctl_cb(fdp, ctx);
}
else{
rc = syscall_generic_forwarding(__NR_ioctl, ctx);
}
return rc;
}
SYSCALL_DECLARE(close)
{
int fd = ihk_mc_syscall_arg0(ctx);
int rc;
long rc;
struct thread *thread = cpu_local_var(current);
struct sigfd *sfd;
struct sigfd *sb;
long irqstate;
struct process *proc = thread->proc;
struct mckfd *fdp;
struct mckfd *fdq;
long irqstate;
irqstate = ihk_mc_spinlock_lock(&thread->sigcommon->lock);
for(sfd = thread->sigcommon->sigfd, sb = NULL; sfd; sb = sfd, sfd = sfd->next)
if(sfd->fd == fd)
irqstate = ihk_mc_spinlock_lock(&proc->mckfd_lock);
for(fdp = proc->mckfd, fdq = NULL; fdp; fdq = fdp, fdp = fdp->next)
if(fdp->fd == fd)
break;
if(sfd){
struct syscall_request request IHK_DMA_ALIGN;
if(sb)
sb->next = sfd->next;
if(fdp){
kprintf("close: found system fd %d pid=%d\n", fd, proc->pid);
if(fdq)
fdq->next = fdp->next;
else
thread->sigcommon->sigfd = sfd->next;
ihk_mc_spinlock_unlock(&thread->sigcommon->lock, irqstate);
request.number = __NR_signalfd4;
request.args[0] = 1;
request.args[1] = sfd->fd;
kfree(sfd);
rc = do_syscall(&request, ihk_mc_get_processor_id(), 0);
proc->mckfd = fdp->next;
ihk_mc_spinlock_unlock(&proc->mckfd_lock, irqstate);
if(fdp->close_cb)
fdp->close_cb(fdp, ctx);
kfree(fdp);
rc = syscall_generic_forwarding(__NR_close, ctx);
}
else{
ihk_mc_spinlock_unlock(&thread->sigcommon->lock, irqstate);
ihk_mc_spinlock_unlock(&proc->mckfd_lock, irqstate);
rc = syscall_generic_forwarding(__NR_close, ctx);
}
return rc;
@ -2487,7 +2538,8 @@ SYSCALL_DECLARE(signalfd4)
{
int fd = ihk_mc_syscall_arg0(ctx);
struct thread *thread = cpu_local_var(current);
struct sigfd *sfd;
struct process *proc = thread->proc;
struct mckfd *sfd;
long irqstate;
sigset_t *maskp = (sigset_t *)ihk_mc_syscall_arg1(ctx);;
__sigset_t mask;
@ -2501,10 +2553,9 @@ SYSCALL_DECLARE(signalfd4)
if(flags & ~(SFD_NONBLOCK | SFD_CLOEXEC))
return -EINVAL;
irqstate = ihk_mc_spinlock_lock(&thread->sigcommon->lock);
if(fd == -1){
struct syscall_request request IHK_DMA_ALIGN;
ihk_mc_spinlock_unlock(&thread->sigcommon->lock, irqstate);
request.number = __NR_signalfd4;
request.args[0] = 0;
request.args[1] = flags;
@ -2512,25 +2563,73 @@ SYSCALL_DECLARE(signalfd4)
if(fd < 0){
return fd;
}
sfd = kmalloc(sizeof(struct sigfd), IHK_MC_AP_NOWAIT);
sfd = kmalloc(sizeof(struct mckfd), IHK_MC_AP_NOWAIT);
if(!sfd)
return -ENOMEM;
sfd->fd = fd;
irqstate = ihk_mc_spinlock_lock(&thread->sigcommon->lock);
sfd->next = thread->sigcommon->sigfd;
thread->sigcommon->sigfd = sfd;
irqstate = ihk_mc_spinlock_lock(&proc->mckfd_lock);
sfd->next = proc->mckfd;
proc->mckfd = sfd;
}
else{
for(sfd = thread->sigcommon->sigfd; sfd; sfd = sfd->next)
irqstate = ihk_mc_spinlock_lock(&proc->mckfd_lock);
for(sfd = proc->mckfd; sfd; sfd = sfd->next)
if(sfd->fd == fd)
break;
if(!sfd){
ihk_mc_spinlock_unlock(&thread->sigcommon->lock, irqstate);
ihk_mc_spinlock_unlock(&proc->mckfd_lock, irqstate);
return -EINVAL;
}
}
memcpy(&sfd->mask, &mask, sizeof mask);
ihk_mc_spinlock_unlock(&thread->sigcommon->lock, irqstate);
memcpy(&sfd->data, &mask, sizeof mask);
ihk_mc_spinlock_unlock(&proc->mckfd_lock, irqstate);
return sfd->fd;
}
static long
perf_event_read(struct mckfd *sfd, ihk_mc_user_context_t *ctx)
{
return 0;
}
static int
perf_event_ioctl(struct mckfd *sfd, ihk_mc_user_context_t *ctx)
{
return 0;
}
static int
perf_event_close(struct mckfd *sfd, ihk_mc_user_context_t *ctx)
{
return 0;
}
SYSCALL_DECLARE(perf_event_open)
{
struct syscall_request request IHK_DMA_ALIGN;
struct thread *thread = cpu_local_var(current);
struct process *proc = thread->proc;
struct mckfd *sfd;
int fd;
long irqstate;
request.number = __NR_perf_event_open;
request.args[0] = 0;
fd = do_syscall(&request, ihk_mc_get_processor_id(), 0);
if(fd < 0){
return fd;
}
sfd = kmalloc(sizeof(struct mckfd), IHK_MC_AP_NOWAIT);
if(!sfd)
return -ENOMEM;
sfd->fd = fd;
sfd->read_cb = perf_event_read;
sfd->ioctl_cb = perf_event_ioctl;
sfd->close_cb = perf_event_close;
irqstate = ihk_mc_spinlock_lock(&proc->mckfd_lock);
sfd->next = proc->mckfd;
proc->mckfd = sfd;
ihk_mc_spinlock_unlock(&proc->mckfd_lock, irqstate);
return sfd->fd;
}