January 2024 - Wine-Devel - list.winehq.org

[RFC PATCH v2 19/29] selftests: ntsync: Add some tests for NTSYNC_IOC_WAIT_ANY.

by Elizabeth Figura

Test basic synchronous functionality of NTSYNC_IOC_WAIT_ANY, when objects are considered signaled or not signaled, and how they are affected by a successful wait. Signed-off-by: Elizabeth Figura <zfigura(a)codeweavers.com> --- .../testing/selftests/drivers/ntsync/ntsync.c | 105 ++++++++++++++++++ 1 file changed, 105 insertions(+) diff --git a/tools/testing/selftests/drivers/ntsync/ntsync.c b/tools/testing/selftests/drivers/ntsync/ntsync.c index 80c8bd409d68..13e7c9d7441e 100644 --- a/tools/testing/selftests/drivers/ntsync/ntsync.c +++ b/tools/testing/selftests/drivers/ntsync/ntsync.c @@ -321,4 +321,109 @@ TEST(mutex_state) close(fd); } +TEST(test_wait_any) +{ + struct ntsync_mutex_args mutex_args = {0}; + struct ntsync_wait_args wait_args = {0}; + struct ntsync_sem_args sem_args = {0}; + __u32 owner, index, count; + struct timespec timeout; + int objs[2], fd, ret; + + clock_gettime(CLOCK_MONOTONIC, &timeout); + + fd = open("/dev/ntsync", O_CLOEXEC | O_RDONLY); + ASSERT_LE(0, fd); + + sem_args.count = 2; + sem_args.max = 3; + sem_args.sem = 0xdeadbeef; + ret = ioctl(fd, NTSYNC_IOC_CREATE_SEM, &sem_args); + EXPECT_EQ(0, ret); + EXPECT_NE(0xdeadbeef, sem_args.sem); + + mutex_args.owner = 0; + mutex_args.count = 0; + mutex_args.mutex = 0xdeadbeef; + ret = ioctl(fd, NTSYNC_IOC_CREATE_MUTEX, &mutex_args); + EXPECT_EQ(0, ret); + EXPECT_NE(0xdeadbeef, mutex_args.mutex); + + objs[0] = sem_args.sem; + objs[1] = mutex_args.mutex; + + ret = wait_any(fd, 2, objs, 123, &index); + EXPECT_EQ(0, ret); + EXPECT_EQ(0, index); + check_sem_state(sem_args.sem, 1, 3); + check_mutex_state(mutex_args.mutex, 0, 0); + + ret = wait_any(fd, 2, objs, 123, &index); + EXPECT_EQ(0, ret); + EXPECT_EQ(0, index); + check_sem_state(sem_args.sem, 0, 3); + check_mutex_state(mutex_args.mutex, 0, 0); + + ret = wait_any(fd, 2, objs, 123, &index); + EXPECT_EQ(0, ret); + EXPECT_EQ(1, index); + check_sem_state(sem_args.sem, 0, 3); + check_mutex_state(mutex_args.mutex, 1, 123); + + count = 1; + ret = post_sem(sem_args.sem, &count); + EXPECT_EQ(0, ret); + EXPECT_EQ(0, count); + + ret = wait_any(fd, 2, objs, 123, &index); + EXPECT_EQ(0, ret); + EXPECT_EQ(0, index); + check_sem_state(sem_args.sem, 0, 3); + check_mutex_state(mutex_args.mutex, 1, 123); + + ret = wait_any(fd, 2, objs, 123, &index); + EXPECT_EQ(0, ret); + EXPECT_EQ(1, index); + check_sem_state(sem_args.sem, 0, 3); + check_mutex_state(mutex_args.mutex, 2, 123); + + ret = wait_any(fd, 2, objs, 456, &index); + EXPECT_EQ(-1, ret); + EXPECT_EQ(ETIMEDOUT, errno); + + owner = 123; + ret = ioctl(mutex_args.mutex, NTSYNC_IOC_MUTEX_KILL, &owner); + EXPECT_EQ(0, ret); + + ret = wait_any(fd, 2, objs, 456, &index); + EXPECT_EQ(-1, ret); + EXPECT_EQ(EOWNERDEAD, errno); + EXPECT_EQ(1, index); + + ret = wait_any(fd, 2, objs, 456, &index); + EXPECT_EQ(0, ret); + EXPECT_EQ(1, index); + + /* test waiting on the same object twice */ + count = 2; + ret = post_sem(sem_args.sem, &count); + EXPECT_EQ(0, ret); + EXPECT_EQ(0, count); + + objs[0] = objs[1] = sem_args.sem; + ret = wait_any(fd, 2, objs, 456, &index); + EXPECT_EQ(0, ret); + EXPECT_EQ(0, wait_args.index); + check_sem_state(sem_args.sem, 1, 3); + + ret = wait_any(fd, 0, NULL, 456, &index); + EXPECT_EQ(-1, ret); + EXPECT_EQ(ETIMEDOUT, errno); + + close(sem_args.sem); + close(mutex_args.mutex); + + close(fd); +} + TEST_HARNESS_MAIN -- 2.43.0

Jan. 31, 2024

[RFC PATCH v2 18/29] selftests: ntsync: Add some tests for mutex state.

by Elizabeth Figura

Test mutex-specific ioctls NTSYNC_IOC_MUTEX_UNLOCK and NTSYNC_IOC_MUTEX_READ, and waiting on mutexes. Signed-off-by: Elizabeth Figura <zfigura(a)codeweavers.com> --- .../testing/selftests/drivers/ntsync/ntsync.c | 181 ++++++++++++++++++ 1 file changed, 181 insertions(+) diff --git a/tools/testing/selftests/drivers/ntsync/ntsync.c b/tools/testing/selftests/drivers/ntsync/ntsync.c index 6ceb48fb42e3..80c8bd409d68 100644 --- a/tools/testing/selftests/drivers/ntsync/ntsync.c +++ b/tools/testing/selftests/drivers/ntsync/ntsync.c @@ -40,6 +40,39 @@ static int post_sem(int sem, __u32 *count) return ioctl(sem, NTSYNC_IOC_SEM_POST, count); } +static int read_mutex_state(int mutex, __u32 *count, __u32 *owner) +{ + struct ntsync_mutex_args args; + int ret; + + memset(&args, 0xcc, sizeof(args)); + ret = ioctl(mutex, NTSYNC_IOC_MUTEX_READ, &args); + *count = args.count; + *owner = args.owner; + return ret; +} + +#define check_mutex_state(mutex, count, owner) \ + ({ \ + __u32 __count, __owner; \ + int ret = read_mutex_state((mutex), &__count, &__owner); \ + EXPECT_EQ(0, ret); \ + EXPECT_EQ((count), __count); \ + EXPECT_EQ((owner), __owner); \ + }) + +static int unlock_mutex(int mutex, __u32 owner, __u32 *count) +{ + struct ntsync_mutex_args args; + int ret; + + args.owner = owner; + args.count = 0xdeadbeef; + ret = ioctl(mutex, NTSYNC_IOC_MUTEX_UNLOCK, &args); + *count = args.count; + return ret; +} + static int wait_any(int fd, __u32 count, const int *objs, __u32 owner, __u32 *index) { struct ntsync_wait_args args = {0}; @@ -140,4 +173,152 @@ TEST(semaphore_state) close(fd); } +TEST(mutex_state) +{ + struct ntsync_mutex_args mutex_args; + __u32 owner, count, index; + struct timespec timeout; + int fd, ret, mutex; + + clock_gettime(CLOCK_MONOTONIC, &timeout); + + fd = open("/dev/ntsync", O_CLOEXEC | O_RDONLY); + ASSERT_LE(0, fd); + + mutex_args.owner = 123; + mutex_args.count = 0; + ret = ioctl(fd, NTSYNC_IOC_CREATE_MUTEX, &mutex_args); + EXPECT_EQ(-1, ret); + EXPECT_EQ(EINVAL, errno); + + mutex_args.owner = 0; + mutex_args.count = 2; + ret = ioctl(fd, NTSYNC_IOC_CREATE_MUTEX, &mutex_args); + EXPECT_EQ(-1, ret); + EXPECT_EQ(EINVAL, errno); + + mutex_args.owner = 123; + mutex_args.count = 2; + mutex_args.mutex = 0xdeadbeef; + ret = ioctl(fd, NTSYNC_IOC_CREATE_MUTEX, &mutex_args); + EXPECT_EQ(0, ret); + EXPECT_NE(0xdeadbeef, mutex_args.mutex); + mutex = mutex_args.mutex; + check_mutex_state(mutex, 2, 123); + + ret = unlock_mutex(mutex, 0, &count); + EXPECT_EQ(-1, ret); + EXPECT_EQ(EINVAL, errno); + + ret = unlock_mutex(mutex, 456, &count); + EXPECT_EQ(-1, ret); + EXPECT_EQ(EPERM, errno); + check_mutex_state(mutex, 2, 123); + + ret = unlock_mutex(mutex, 123, &count); + EXPECT_EQ(0, ret); + EXPECT_EQ(2, count); + check_mutex_state(mutex, 1, 123); + + ret = unlock_mutex(mutex, 123, &count); + EXPECT_EQ(0, ret); + EXPECT_EQ(1, count); + check_mutex_state(mutex, 0, 0); + + ret = unlock_mutex(mutex, 123, &count); + EXPECT_EQ(-1, ret); + EXPECT_EQ(EPERM, errno); + + ret = wait_any(fd, 1, &mutex, 456, &index); + EXPECT_EQ(0, ret); + EXPECT_EQ(0, index); + check_mutex_state(mutex, 1, 456); + + ret = wait_any(fd, 1, &mutex, 456, &index); + EXPECT_EQ(0, ret); + EXPECT_EQ(0, index); + check_mutex_state(mutex, 2, 456); + + ret = unlock_mutex(mutex, 456, &count); + EXPECT_EQ(0, ret); + EXPECT_EQ(2, count); + check_mutex_state(mutex, 1, 456); + + ret = wait_any(fd, 1, &mutex, 123, &index); + EXPECT_EQ(-1, ret); + EXPECT_EQ(ETIMEDOUT, errno); + + owner = 0; + ret = ioctl(mutex, NTSYNC_IOC_MUTEX_KILL, &owner); + EXPECT_EQ(-1, ret); + EXPECT_EQ(EINVAL, errno); + + owner = 123; + ret = ioctl(mutex, NTSYNC_IOC_MUTEX_KILL, &owner); + EXPECT_EQ(-1, ret); + EXPECT_EQ(EPERM, errno); + check_mutex_state(mutex, 1, 456); + + owner = 456; + ret = ioctl(mutex, NTSYNC_IOC_MUTEX_KILL, &owner); + EXPECT_EQ(0, ret); + + memset(&mutex_args, 0xcc, sizeof(mutex_args)); + ret = ioctl(mutex, NTSYNC_IOC_MUTEX_READ, &mutex_args); + EXPECT_EQ(-1, ret); + EXPECT_EQ(EOWNERDEAD, errno); + EXPECT_EQ(0, mutex_args.count); + EXPECT_EQ(0, mutex_args.owner); + + memset(&mutex_args, 0xcc, sizeof(mutex_args)); + ret = ioctl(mutex, NTSYNC_IOC_MUTEX_READ, &mutex_args); + EXPECT_EQ(-1, ret); + EXPECT_EQ(EOWNERDEAD, errno); + EXPECT_EQ(0, mutex_args.count); + EXPECT_EQ(0, mutex_args.owner); + + ret = wait_any(fd, 1, &mutex, 123, &index); + EXPECT_EQ(-1, ret); + EXPECT_EQ(EOWNERDEAD, errno); + EXPECT_EQ(0, index); + check_mutex_state(mutex, 1, 123); + + owner = 123; + ret = ioctl(mutex, NTSYNC_IOC_MUTEX_KILL, &owner); + EXPECT_EQ(0, ret); + + memset(&mutex_args, 0xcc, sizeof(mutex_args)); + ret = ioctl(mutex, NTSYNC_IOC_MUTEX_READ, &mutex_args); + EXPECT_EQ(-1, ret); + EXPECT_EQ(EOWNERDEAD, errno); + EXPECT_EQ(0, mutex_args.count); + EXPECT_EQ(0, mutex_args.owner); + + ret = wait_any(fd, 1, &mutex, 123, &index); + EXPECT_EQ(-1, ret); + EXPECT_EQ(EOWNERDEAD, errno); + EXPECT_EQ(0, index); + check_mutex_state(mutex, 1, 123); + + close(mutex); + + mutex_args.owner = 0; + mutex_args.count = 0; + mutex_args.mutex = 0xdeadbeef; + ret = ioctl(fd, NTSYNC_IOC_CREATE_MUTEX, &mutex_args); + EXPECT_EQ(0, ret); + EXPECT_NE(0xdeadbeef, mutex_args.mutex); + mutex = mutex_args.mutex; + check_mutex_state(mutex, 0, 0); + + ret = wait_any(fd, 1, &mutex, 123, &index); + EXPECT_EQ(0, ret); + EXPECT_EQ(0, index); + check_mutex_state(mutex, 1, 123); + + close(mutex); + + close(fd); +} + TEST_HARNESS_MAIN -- 2.43.0

Jan. 31, 2024

[RFC PATCH v2 17/29] selftests: ntsync: Add some tests for semaphore state.

by Elizabeth Figura

Wine has tests for its synchronization primitives, but these are more accessible to kernel developers, and also allow us to test some edge cases that Wine does not care about. This patch adds tests for semaphore-specific ioctls NTSYNC_IOC_SEM_POST and NTSYNC_IOC_SEM_READ, and waiting on semaphores. Signed-off-by: Elizabeth Figura <zfigura(a)codeweavers.com> --- tools/testing/selftests/Makefile | 1 + .../testing/selftests/drivers/ntsync/Makefile | 8 + tools/testing/selftests/drivers/ntsync/config | 1 + .../testing/selftests/drivers/ntsync/ntsync.c | 143 ++++++++++++++++++ 4 files changed, 153 insertions(+) create mode 100644 tools/testing/selftests/drivers/ntsync/Makefile create mode 100644 tools/testing/selftests/drivers/ntsync/config create mode 100644 tools/testing/selftests/drivers/ntsync/ntsync.c diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index 15b6a111c3be..6c714a4e6478 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -15,6 +15,7 @@ TARGETS += cpu-hotplug TARGETS += damon TARGETS += dmabuf-heaps TARGETS += drivers/dma-buf +TARGETS += drivers/ntsync TARGETS += drivers/s390x/uvdevice TARGETS += drivers/net/bonding TARGETS += drivers/net/team diff --git a/tools/testing/selftests/drivers/ntsync/Makefile b/tools/testing/selftests/drivers/ntsync/Makefile new file mode 100644 index 000000000000..a34da5ccacf0 --- /dev/null +++ b/tools/testing/selftests/drivers/ntsync/Makefile @@ -0,0 +1,8 @@ +# SPDX-LICENSE-IDENTIFIER: GPL-2.0-only +TEST_GEN_PROGS := ntsync + +top_srcdir =../../../../.. +CFLAGS += -I$(top_srcdir)/usr/include +LDLIBS += -lpthread + +include ../../lib.mk diff --git a/tools/testing/selftests/drivers/ntsync/config b/tools/testing/selftests/drivers/ntsync/config new file mode 100644 index 000000000000..60539c826d06 --- /dev/null +++ b/tools/testing/selftests/drivers/ntsync/config @@ -0,0 +1 @@ +CONFIG_WINESYNC=y diff --git a/tools/testing/selftests/drivers/ntsync/ntsync.c b/tools/testing/selftests/drivers/ntsync/ntsync.c new file mode 100644 index 000000000000..6ceb48fb42e3 --- /dev/null +++ b/tools/testing/selftests/drivers/ntsync/ntsync.c @@ -0,0 +1,143 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Various unit tests for the "ntsync" synchronization primitive driver. + * + * Copyright (C) 2021-2022 Elizabeth Figura + */ + +#define _GNU_SOURCE +#include <sys/ioctl.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <time.h> +#include <pthread.h> +#include <linux/ntsync.h> +#include "../../kselftest_harness.h" + +static int read_sem_state(int sem, __u32 *count, __u32 *max) +{ + struct ntsync_sem_args args; + int ret; + + memset(&args, 0xcc, sizeof(args)); + ret = ioctl(sem, NTSYNC_IOC_SEM_READ, &args); + *count = args.count; + *max = args.max; + return ret; +} + +#define check_sem_state(sem, count, max) \ + ({ \ + __u32 __count, __max; \ + int ret = read_sem_state((sem), &__count, &__max); \ + EXPECT_EQ(0, ret); \ + EXPECT_EQ((count), __count); \ + EXPECT_EQ((max), __max); \ + }) + +static int post_sem(int sem, __u32 *count) +{ + return ioctl(sem, NTSYNC_IOC_SEM_POST, count); +} + +static int wait_any(int fd, __u32 count, const int *objs, __u32 owner, __u32 *index) +{ + struct ntsync_wait_args args = {0}; + struct timespec timeout; + int ret; + + clock_gettime(CLOCK_MONOTONIC, &timeout); + + args.timeout = timeout.tv_sec * 1000000000 + timeout.tv_nsec; + args.count = count; + args.objs = (uintptr_t)objs; + args.owner = owner; + args.index = 0xdeadbeef; + ret = ioctl(fd, NTSYNC_IOC_WAIT_ANY, &args); + *index = args.index; + return ret; +} + +TEST(semaphore_state) +{ + struct ntsync_sem_args sem_args; + struct timespec timeout; + __u32 count, index; + int fd, ret, sem; + + clock_gettime(CLOCK_MONOTONIC, &timeout); + + fd = open("/dev/ntsync", O_CLOEXEC | O_RDONLY); + ASSERT_LE(0, fd); + + sem_args.count = 3; + sem_args.max = 2; + sem_args.sem = 0xdeadbeef; + ret = ioctl(fd, NTSYNC_IOC_CREATE_SEM, &sem_args); + EXPECT_EQ(-1, ret); + EXPECT_EQ(EINVAL, errno); + + sem_args.count = 2; + sem_args.max = 2; + sem_args.sem = 0xdeadbeef; + ret = ioctl(fd, NTSYNC_IOC_CREATE_SEM, &sem_args); + EXPECT_EQ(0, ret); + EXPECT_NE(0xdeadbeef, sem_args.sem); + sem = sem_args.sem; + check_sem_state(sem, 2, 2); + + count = 0; + ret = post_sem(sem, &count); + EXPECT_EQ(0, ret); + EXPECT_EQ(2, count); + check_sem_state(sem, 2, 2); + + count = 1; + ret = post_sem(sem, &count); + EXPECT_EQ(-1, ret); + EXPECT_EQ(EOVERFLOW, errno); + check_sem_state(sem, 2, 2); + + ret = wait_any(fd, 1, &sem, 123, &index); + EXPECT_EQ(0, ret); + EXPECT_EQ(0, index); + check_sem_state(sem, 1, 2); + + ret = wait_any(fd, 1, &sem, 123, &index); + EXPECT_EQ(0, ret); + EXPECT_EQ(0, index); + check_sem_state(sem, 0, 2); + + ret = wait_any(fd, 1, &sem, 123, &index); + EXPECT_EQ(-1, ret); + EXPECT_EQ(ETIMEDOUT, errno); + + count = 3; + ret = post_sem(sem, &count); + EXPECT_EQ(-1, ret); + EXPECT_EQ(EOVERFLOW, errno); + check_sem_state(sem, 0, 2); + + count = 2; + ret = post_sem(sem, &count); + EXPECT_EQ(0, ret); + EXPECT_EQ(0, count); + check_sem_state(sem, 2, 2); + + ret = wait_any(fd, 1, &sem, 123, &index); + EXPECT_EQ(0, ret); + ret = wait_any(fd, 1, &sem, 123, &index); + EXPECT_EQ(0, ret); + + count = 1; + ret = post_sem(sem, &count); + EXPECT_EQ(0, ret); + EXPECT_EQ(0, count); + check_sem_state(sem, 1, 2); + + close(sem); + + close(fd); +} + +TEST_HARNESS_MAIN -- 2.43.0

Jan. 31, 2024

[RFC PATCH v2 16/29] ntsync: Introduce alertable waits.

by Elizabeth Figura

NT waits can optionally be made "alertable". This is a special channel for thread wakeup that is mildly similar to SIGIO. A thread has an internal single bit of "alerted" state, and if a thread is made alerted while an alertable wait, the wait will return a special value, consume the "alerted" state, and will not consume any of its objects. Alerts are implemented using events; the user-space NT emulator is expected to create an internal ntsync event for each thread and pass that event to wait functions. Signed-off-by: Elizabeth Figura <zfigura(a)codeweavers.com> --- drivers/misc/ntsync.c | 68 ++++++++++++++++++++++++++++++++----- include/uapi/linux/ntsync.h | 2 +- 2 files changed, 60 insertions(+), 10 deletions(-) diff --git a/drivers/misc/ntsync.c b/drivers/misc/ntsync.c index 5439c1c9e90f..1e619e1ce6a6 100644 --- a/drivers/misc/ntsync.c +++ b/drivers/misc/ntsync.c @@ -784,22 +784,29 @@ static int setup_wait(struct ntsync_device *dev, const struct ntsync_wait_args *args, bool all, struct ntsync_q **ret_q) { + int fds[NTSYNC_MAX_WAIT_COUNT + 1]; const __u32 count = args->count; - int fds[NTSYNC_MAX_WAIT_COUNT]; struct ntsync_q *q; + __u32 total_count; __u32 i, j; - if (!args->owner || args->pad) + if (!args->owner) return -EINVAL; if (args->count > NTSYNC_MAX_WAIT_COUNT) return -EINVAL; + total_count = count; + if (args->alert) + total_count++; + if (copy_from_user(fds, u64_to_user_ptr(args->objs), array_size(count, sizeof(*fds)))) return -EFAULT; + if (args->alert) + fds[count] = args->alert; - q = kmalloc(struct_size(q, entries, count), GFP_KERNEL); + q = kmalloc(struct_size(q, entries, total_count), GFP_KERNEL); if (!q) return -ENOMEM; q->task = current; @@ -809,7 +816,7 @@ static int setup_wait(struct ntsync_device *dev, q->ownerdead = false; q->count = count; - for (i = 0; i < count; i++) { + for (i = 0; i < total_count; i++) { struct ntsync_q_entry *entry = &q->entries[i]; struct ntsync_obj *obj = get_obj(dev, fds[i]); @@ -860,9 +867,9 @@ static int ntsync_wait_any(struct ntsync_device *dev, void __user *argp) { struct ntsync_wait_args args; struct ntsync_q *q; + __u32 i, total_count; ktime_t timeout; int signaled; - __u32 i; int ret; if (copy_from_user(&args, argp, sizeof(args))) @@ -872,9 +879,13 @@ static int ntsync_wait_any(struct ntsync_device *dev, void __user *argp) if (ret < 0) return ret; + total_count = args.count; + if (args.alert) + total_count++; + /* queue ourselves */ - for (i = 0; i < args.count; i++) { + for (i = 0; i < total_count; i++) { struct ntsync_q_entry *entry = &q->entries[i]; struct ntsync_obj *obj = entry->obj; @@ -883,9 +894,15 @@ static int ntsync_wait_any(struct ntsync_device *dev, void __user *argp) spin_unlock(&obj->lock); } - /* check if we are already signaled */ + /* + * Check if we are already signaled. + * + * Note that the API requires that normal objects are checked before + * the alert event. Hence we queue the alert event last, and check + * objects in order. + */ - for (i = 0; i < args.count; i++) { + for (i = 0; i < total_count; i++) { struct ntsync_obj *obj = q->entries[i].obj; if (atomic_read(&q->signaled) != -1) @@ -903,7 +920,7 @@ static int ntsync_wait_any(struct ntsync_device *dev, void __user *argp) /* and finally, unqueue */ - for (i = 0; i < args.count; i++) { + for (i = 0; i < total_count; i++) { struct ntsync_q_entry *entry = &q->entries[i]; struct ntsync_obj *obj = entry->obj; @@ -964,6 +981,14 @@ static int ntsync_wait_all(struct ntsync_device *dev, void __user *argp) */ list_add_tail(&entry->node, &obj->all_waiters); } + if (args.alert) { + struct ntsync_q_entry *entry = &q->entries[args.count]; + struct ntsync_obj *obj = entry->obj; + + spin_lock_nest_lock(&obj->lock, &dev->wait_all_lock); + list_add_tail(&entry->node, &obj->any_waiters); + spin_unlock(&obj->lock); + } /* check if we are already signaled */ @@ -971,6 +996,21 @@ static int ntsync_wait_all(struct ntsync_device *dev, void __user *argp) spin_unlock(&dev->wait_all_lock); + /* + * Check if the alert event is signaled, making sure to do so only + * after checking if the other objects are signaled. + */ + + if (args.alert) { + struct ntsync_obj *obj = q->entries[args.count].obj; + + if (atomic_read(&q->signaled) == -1) { + spin_lock(&obj->lock); + try_wake_any_obj(obj); + spin_unlock(&obj->lock); + } + } + /* sleep */ timeout = ns_to_ktime(args.timeout); @@ -994,6 +1034,16 @@ static int ntsync_wait_all(struct ntsync_device *dev, void __user *argp) put_obj(obj); } + if (args.alert) { + struct ntsync_q_entry *entry = &q->entries[args.count]; + struct ntsync_obj *obj = entry->obj; + + spin_lock_nest_lock(&obj->lock, &dev->wait_all_lock); + list_del(&entry->node); + spin_unlock(&obj->lock); + + put_obj(obj); + } spin_unlock(&dev->wait_all_lock); diff --git a/include/uapi/linux/ntsync.h b/include/uapi/linux/ntsync.h index 582d33b0dcac..7c91af7011e4 100644 --- a/include/uapi/linux/ntsync.h +++ b/include/uapi/linux/ntsync.h @@ -34,7 +34,7 @@ struct ntsync_wait_args { __u32 count; __u32 owner; __u32 index; - __u32 pad; + __u32 alert; }; #define NTSYNC_MAX_WAIT_COUNT 64 -- 2.43.0

Jan. 31, 2024

[RFC PATCH v2 15/29] ntsync: Introduce NTSYNC_IOC_EVENT_READ.

by Elizabeth Figura

This corresponds to the NT syscall NtQueryEvent(). This returns the signaled state of the event and whether it is manual-reset. Signed-off-by: Elizabeth Figura <zfigura(a)codeweavers.com> --- drivers/misc/ntsync.c | 21 +++++++++++++++++++++ include/uapi/linux/ntsync.h | 1 + 2 files changed, 22 insertions(+) diff --git a/drivers/misc/ntsync.c b/drivers/misc/ntsync.c index 7f5f96ec7c69..5439c1c9e90f 100644 --- a/drivers/misc/ntsync.c +++ b/drivers/misc/ntsync.c @@ -546,6 +546,25 @@ static int ntsync_mutex_read(struct ntsync_obj *mutex, void __user *argp) return ret; } +static int ntsync_event_read(struct ntsync_obj *event, void __user *argp) +{ + struct ntsync_event_args __user *user_args = argp; + struct ntsync_event_args args; + + if (event->type != NTSYNC_TYPE_EVENT) + return -EINVAL; + + args.event = 0; + spin_lock(&event->lock); + args.manual = event->u.event.manual; + args.signaled = event->u.event.signaled; + spin_unlock(&event->lock); + + if (copy_to_user(user_args, &args, sizeof(args))) + return -EFAULT; + return 0; +} + static int ntsync_obj_release(struct inode *inode, struct file *file) { struct ntsync_obj *obj = file->private_data; @@ -579,6 +598,8 @@ static long ntsync_obj_ioctl(struct file *file, unsigned int cmd, return ntsync_event_reset(obj, argp); case NTSYNC_IOC_EVENT_PULSE: return ntsync_event_set(obj, argp, true); + case NTSYNC_IOC_EVENT_READ: + return ntsync_event_read(obj, argp); default: return -ENOIOCTLCMD; } diff --git a/include/uapi/linux/ntsync.h b/include/uapi/linux/ntsync.h index a1d0ef581212..582d33b0dcac 100644 --- a/include/uapi/linux/ntsync.h +++ b/include/uapi/linux/ntsync.h @@ -53,5 +53,6 @@ struct ntsync_wait_args { #define NTSYNC_IOC_EVENT_PULSE _IOR ('N', 0x8a, __u32) #define NTSYNC_IOC_SEM_READ _IOR ('N', 0x8b, struct ntsync_sem_args) #define NTSYNC_IOC_MUTEX_READ _IOR ('N', 0x8c, struct ntsync_mutex_args) +#define NTSYNC_IOC_EVENT_READ _IOR ('N', 0x8d, struct ntsync_event_args) #endif -- 2.43.0

Jan. 31, 2024

[RFC PATCH v2 14/29] ntsync: Introduce NTSYNC_IOC_MUTEX_READ.

by Elizabeth Figura

This corresponds to the NT syscall NtQueryMutant(). This returns the recursion count, owner, and abandoned state of the mutex. Signed-off-by: Elizabeth Figura <zfigura(a)codeweavers.com> --- drivers/misc/ntsync.c | 23 +++++++++++++++++++++++ include/uapi/linux/ntsync.h | 1 + 2 files changed, 24 insertions(+) diff --git a/drivers/misc/ntsync.c b/drivers/misc/ntsync.c index 6dccfbfb2512..7f5f96ec7c69 100644 --- a/drivers/misc/ntsync.c +++ b/drivers/misc/ntsync.c @@ -525,6 +525,27 @@ static int ntsync_sem_read(struct ntsync_obj *sem, void __user *argp) return 0; } +static int ntsync_mutex_read(struct ntsync_obj *mutex, void __user *argp) +{ + struct ntsync_mutex_args __user *user_args = argp; + struct ntsync_mutex_args args; + int ret; + + if (mutex->type != NTSYNC_TYPE_MUTEX) + return -EINVAL; + + args.mutex = 0; + spin_lock(&mutex->lock); + args.count = mutex->u.mutex.count; + args.owner = mutex->u.mutex.owner; + ret = mutex->u.mutex.ownerdead ? -EOWNERDEAD : 0; + spin_unlock(&mutex->lock); + + if (copy_to_user(user_args, &args, sizeof(args))) + return -EFAULT; + return ret; +} + static int ntsync_obj_release(struct inode *inode, struct file *file) { struct ntsync_obj *obj = file->private_data; @@ -550,6 +571,8 @@ static long ntsync_obj_ioctl(struct file *file, unsigned int cmd, return ntsync_mutex_unlock(obj, argp); case NTSYNC_IOC_MUTEX_KILL: return ntsync_mutex_kill(obj, argp); + case NTSYNC_IOC_MUTEX_READ: + return ntsync_mutex_read(obj, argp); case NTSYNC_IOC_EVENT_SET: return ntsync_event_set(obj, argp, false); case NTSYNC_IOC_EVENT_RESET: diff --git a/include/uapi/linux/ntsync.h b/include/uapi/linux/ntsync.h index 6017f621687e..a1d0ef581212 100644 --- a/include/uapi/linux/ntsync.h +++ b/include/uapi/linux/ntsync.h @@ -52,5 +52,6 @@ struct ntsync_wait_args { #define NTSYNC_IOC_EVENT_RESET _IOR ('N', 0x89, __u32) #define NTSYNC_IOC_EVENT_PULSE _IOR ('N', 0x8a, __u32) #define NTSYNC_IOC_SEM_READ _IOR ('N', 0x8b, struct ntsync_sem_args) +#define NTSYNC_IOC_MUTEX_READ _IOR ('N', 0x8c, struct ntsync_mutex_args) #endif -- 2.43.0

Jan. 31, 2024

[RFC PATCH v2 13/29] ntsync: Introduce NTSYNC_IOC_SEM_READ.

by Elizabeth Figura

This corresponds to the NT syscall NtQuerySemaphore(). This returns the current count and maximum count of the semaphore. Signed-off-by: Elizabeth Figura <zfigura(a)codeweavers.com> --- drivers/misc/ntsync.c | 21 +++++++++++++++++++++ include/uapi/linux/ntsync.h | 1 + 2 files changed, 22 insertions(+) diff --git a/drivers/misc/ntsync.c b/drivers/misc/ntsync.c index 240ae858fa96..6dccfbfb2512 100644 --- a/drivers/misc/ntsync.c +++ b/drivers/misc/ntsync.c @@ -506,6 +506,25 @@ static int ntsync_event_reset(struct ntsync_obj *event, void __user *argp) return 0; } +static int ntsync_sem_read(struct ntsync_obj *sem, void __user *argp) +{ + struct ntsync_sem_args __user *user_args = argp; + struct ntsync_sem_args args; + + if (sem->type != NTSYNC_TYPE_SEM) + return -EINVAL; + + args.sem = 0; + spin_lock(&sem->lock); + args.count = sem->u.sem.count; + args.max = sem->u.sem.max; + spin_unlock(&sem->lock); + + if (copy_to_user(user_args, &args, sizeof(args))) + return -EFAULT; + return 0; +} + static int ntsync_obj_release(struct inode *inode, struct file *file) { struct ntsync_obj *obj = file->private_data; @@ -525,6 +544,8 @@ static long ntsync_obj_ioctl(struct file *file, unsigned int cmd, switch (cmd) { case NTSYNC_IOC_SEM_POST: return ntsync_sem_post(obj, argp); + case NTSYNC_IOC_SEM_READ: + return ntsync_sem_read(obj, argp); case NTSYNC_IOC_MUTEX_UNLOCK: return ntsync_mutex_unlock(obj, argp); case NTSYNC_IOC_MUTEX_KILL: diff --git a/include/uapi/linux/ntsync.h b/include/uapi/linux/ntsync.h index 598f894f868d..6017f621687e 100644 --- a/include/uapi/linux/ntsync.h +++ b/include/uapi/linux/ntsync.h @@ -51,5 +51,6 @@ struct ntsync_wait_args { #define NTSYNC_IOC_EVENT_SET _IOR ('N', 0x88, __u32) #define NTSYNC_IOC_EVENT_RESET _IOR ('N', 0x89, __u32) #define NTSYNC_IOC_EVENT_PULSE _IOR ('N', 0x8a, __u32) +#define NTSYNC_IOC_SEM_READ _IOR ('N', 0x8b, struct ntsync_sem_args) #endif -- 2.43.0

Jan. 31, 2024

[RFC PATCH v2 12/29] ntsync: Introduce NTSYNC_IOC_EVENT_PULSE.

by Elizabeth Figura

This corresponds to the NT syscall NtPulseEvent(). This wakes up any waiters as if the event had been set, but does not set the event, instead resetting it if it had been signalled. Thus, for a manual-reset event, all waiters are woken, whereas for an auto-reset event, at most one waiter is woken. Signed-off-by: Elizabeth Figura <zfigura(a)codeweavers.com> --- drivers/misc/ntsync.c | 10 ++++++++-- include/uapi/linux/ntsync.h | 1 + 2 files changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/misc/ntsync.c b/drivers/misc/ntsync.c index 009d927739b8..240ae858fa96 100644 --- a/drivers/misc/ntsync.c +++ b/drivers/misc/ntsync.c @@ -447,7 +447,7 @@ static int ntsync_mutex_kill(struct ntsync_obj *mutex, void __user *argp) return ret; } -static int ntsync_event_set(struct ntsync_obj *event, void __user *argp) +static int ntsync_event_set(struct ntsync_obj *event, void __user *argp, bool pulse) { struct ntsync_device *dev = event->dev; __u32 prev_state; @@ -463,6 +463,8 @@ static int ntsync_event_set(struct ntsync_obj *event, void __user *argp) event->u.event.signaled = true; try_wake_all_obj(dev, event); try_wake_any_event(event); + if (pulse) + event->u.event.signaled = false; spin_unlock(&event->lock); spin_unlock(&dev->wait_all_lock); @@ -472,6 +474,8 @@ static int ntsync_event_set(struct ntsync_obj *event, void __user *argp) prev_state = event->u.event.signaled; event->u.event.signaled = true; try_wake_any_event(event); + if (pulse) + event->u.event.signaled = false; spin_unlock(&event->lock); } @@ -526,9 +530,11 @@ static long ntsync_obj_ioctl(struct file *file, unsigned int cmd, case NTSYNC_IOC_MUTEX_KILL: return ntsync_mutex_kill(obj, argp); case NTSYNC_IOC_EVENT_SET: - return ntsync_event_set(obj, argp); + return ntsync_event_set(obj, argp, false); case NTSYNC_IOC_EVENT_RESET: return ntsync_event_reset(obj, argp); + case NTSYNC_IOC_EVENT_PULSE: + return ntsync_event_set(obj, argp, true); default: return -ENOIOCTLCMD; } diff --git a/include/uapi/linux/ntsync.h b/include/uapi/linux/ntsync.h index f2d7507d8438..598f894f868d 100644 --- a/include/uapi/linux/ntsync.h +++ b/include/uapi/linux/ntsync.h @@ -50,5 +50,6 @@ struct ntsync_wait_args { #define NTSYNC_IOC_MUTEX_KILL _IOW ('N', 0x86, __u32) #define NTSYNC_IOC_EVENT_SET _IOR ('N', 0x88, __u32) #define NTSYNC_IOC_EVENT_RESET _IOR ('N', 0x89, __u32) +#define NTSYNC_IOC_EVENT_PULSE _IOR ('N', 0x8a, __u32) #endif -- 2.43.0

Jan. 31, 2024

[RFC PATCH v2 11/29] ntsync: Introduce NTSYNC_IOC_EVENT_RESET.

by Elizabeth Figura

This corresponds to the NT syscall NtResetEvent(). This sets the event to the unsignaled state, and returns its previous state. Signed-off-by: Elizabeth Figura <zfigura(a)codeweavers.com> --- drivers/misc/ntsync.c | 22 ++++++++++++++++++++++ include/uapi/linux/ntsync.h | 1 + 2 files changed, 23 insertions(+) diff --git a/drivers/misc/ntsync.c b/drivers/misc/ntsync.c index b2da50989953..009d927739b8 100644 --- a/drivers/misc/ntsync.c +++ b/drivers/misc/ntsync.c @@ -482,6 +482,26 @@ static int ntsync_event_set(struct ntsync_obj *event, void __user *argp) return 0; } +static int ntsync_event_reset(struct ntsync_obj *event, void __user *argp) +{ + __u32 prev_state; + + if (event->type != NTSYNC_TYPE_EVENT) + return -EINVAL; + + spin_lock(&event->lock); + + prev_state = event->u.event.signaled; + event->u.event.signaled = false; + + spin_unlock(&event->lock); + + if (put_user(prev_state, (__u32 __user *)argp)) + return -EFAULT; + + return 0; +} + static int ntsync_obj_release(struct inode *inode, struct file *file) { struct ntsync_obj *obj = file->private_data; @@ -507,6 +527,8 @@ static long ntsync_obj_ioctl(struct file *file, unsigned int cmd, return ntsync_mutex_kill(obj, argp); case NTSYNC_IOC_EVENT_SET: return ntsync_event_set(obj, argp); + case NTSYNC_IOC_EVENT_RESET: + return ntsync_event_reset(obj, argp); default: return -ENOIOCTLCMD; } diff --git a/include/uapi/linux/ntsync.h b/include/uapi/linux/ntsync.h index 782057552483..f2d7507d8438 100644 --- a/include/uapi/linux/ntsync.h +++ b/include/uapi/linux/ntsync.h @@ -49,5 +49,6 @@ struct ntsync_wait_args { #define NTSYNC_IOC_MUTEX_UNLOCK _IOWR('N', 0x85, struct ntsync_mutex_args) #define NTSYNC_IOC_MUTEX_KILL _IOW ('N', 0x86, __u32) #define NTSYNC_IOC_EVENT_SET _IOR ('N', 0x88, __u32) +#define NTSYNC_IOC_EVENT_RESET _IOR ('N', 0x89, __u32) #endif -- 2.43.0

Jan. 31, 2024

[RFC PATCH v2 10/29] ntsync: Introduce NTSYNC_IOC_EVENT_SET.

by Elizabeth Figura

This corresponds to the NT syscall NtSetEvent(). This sets the event to the signaled state, and returns its previous state. Signed-off-by: Elizabeth Figura <zfigura(a)codeweavers.com> --- drivers/misc/ntsync.c | 37 +++++++++++++++++++++++++++++++++++++ include/uapi/linux/ntsync.h | 1 + 2 files changed, 38 insertions(+) diff --git a/drivers/misc/ntsync.c b/drivers/misc/ntsync.c index c719ddd9f6d7..b2da50989953 100644 --- a/drivers/misc/ntsync.c +++ b/drivers/misc/ntsync.c @@ -447,6 +447,41 @@ static int ntsync_mutex_kill(struct ntsync_obj *mutex, void __user *argp) return ret; } +static int ntsync_event_set(struct ntsync_obj *event, void __user *argp) +{ + struct ntsync_device *dev = event->dev; + __u32 prev_state; + + if (event->type != NTSYNC_TYPE_EVENT) + return -EINVAL; + + if (atomic_read(&event->all_hint) > 0) { + spin_lock(&dev->wait_all_lock); + spin_lock_nest_lock(&event->lock, &dev->wait_all_lock); + + prev_state = event->u.event.signaled; + event->u.event.signaled = true; + try_wake_all_obj(dev, event); + try_wake_any_event(event); + + spin_unlock(&event->lock); + spin_unlock(&dev->wait_all_lock); + } else { + spin_lock(&event->lock); + + prev_state = event->u.event.signaled; + event->u.event.signaled = true; + try_wake_any_event(event); + + spin_unlock(&event->lock); + } + + if (put_user(prev_state, (__u32 __user *)argp)) + return -EFAULT; + + return 0; +} + static int ntsync_obj_release(struct inode *inode, struct file *file) { struct ntsync_obj *obj = file->private_data; @@ -470,6 +505,8 @@ static long ntsync_obj_ioctl(struct file *file, unsigned int cmd, return ntsync_mutex_unlock(obj, argp); case NTSYNC_IOC_MUTEX_KILL: return ntsync_mutex_kill(obj, argp); + case NTSYNC_IOC_EVENT_SET: + return ntsync_event_set(obj, argp); default: return -ENOIOCTLCMD; } diff --git a/include/uapi/linux/ntsync.h b/include/uapi/linux/ntsync.h index b8cf503365ef..782057552483 100644 --- a/include/uapi/linux/ntsync.h +++ b/include/uapi/linux/ntsync.h @@ -48,5 +48,6 @@ struct ntsync_wait_args { #define NTSYNC_IOC_SEM_POST _IOWR('N', 0x81, __u32) #define NTSYNC_IOC_MUTEX_UNLOCK _IOWR('N', 0x85, struct ntsync_mutex_args) #define NTSYNC_IOC_MUTEX_KILL _IOW ('N', 0x86, __u32) +#define NTSYNC_IOC_EVENT_SET _IOR ('N', 0x88, __u32) #endif -- 2.43.0

Jan. 31, 2024