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io_uring.c
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/*
* io_uring engine
*
* IO engine using the new native Linux aio io_uring interface. See:
*
* http://git.kernel.dk/cgit/linux-block/log/?h=io_uring
*
*/
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <sys/time.h>
#include <sys/resource.h>
#include "../fio.h"
#include "../lib/pow2.h"
#include "../optgroup.h"
#include "../lib/memalign.h"
#include "../lib/fls.h"
#include "../lib/roundup.h"
#include "../verify.h"
#ifdef ARCH_HAVE_IOURING
#include "../lib/types.h"
#include "../os/linux/io_uring.h"
#include "cmdprio.h"
#include "zbd.h"
#include "nvme.h"
#include <sys/stat.h>
enum uring_cmd_type {
FIO_URING_CMD_NVME = 1,
};
struct io_sq_ring {
unsigned *head;
unsigned *tail;
unsigned *ring_mask;
unsigned *ring_entries;
unsigned *flags;
unsigned *array;
};
struct io_cq_ring {
unsigned *head;
unsigned *tail;
unsigned *ring_mask;
unsigned *ring_entries;
struct io_uring_cqe *cqes;
};
struct ioring_mmap {
void *ptr;
size_t len;
};
struct ioring_data {
int ring_fd;
struct io_u **io_u_index;
char *md_buf;
int *fds;
struct io_sq_ring sq_ring;
struct io_uring_sqe *sqes;
struct iovec *iovecs;
unsigned sq_ring_mask;
struct io_cq_ring cq_ring;
unsigned cq_ring_mask;
int queued;
int cq_ring_off;
unsigned iodepth;
int prepped;
struct ioring_mmap mmap[3];
struct cmdprio cmdprio;
struct nvme_dsm_range *dsm;
};
struct ioring_options {
struct thread_data *td;
unsigned int hipri;
struct cmdprio_options cmdprio_options;
unsigned int fixedbufs;
unsigned int registerfiles;
unsigned int sqpoll_thread;
unsigned int sqpoll_set;
unsigned int sqpoll_cpu;
unsigned int nonvectored;
unsigned int uncached;
unsigned int nowait;
unsigned int force_async;
unsigned int md_per_io_size;
unsigned int pi_act;
unsigned int apptag;
unsigned int apptag_mask;
unsigned int prchk;
char *pi_chk;
enum uring_cmd_type cmd_type;
};
static const int ddir_to_op[2][2] = {
{ IORING_OP_READV, IORING_OP_READ },
{ IORING_OP_WRITEV, IORING_OP_WRITE }
};
static const int fixed_ddir_to_op[2] = {
IORING_OP_READ_FIXED,
IORING_OP_WRITE_FIXED
};
static int fio_ioring_sqpoll_cb(void *data, unsigned long long *val)
{
struct ioring_options *o = data;
o->sqpoll_cpu = *val;
o->sqpoll_set = 1;
return 0;
}
static struct fio_option options[] = {
{
.name = "hipri",
.lname = "High Priority",
.type = FIO_OPT_STR_SET,
.off1 = offsetof(struct ioring_options, hipri),
.help = "Use polled IO completions",
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_IOURING,
},
{
.name = "fixedbufs",
.lname = "Fixed (pre-mapped) IO buffers",
.type = FIO_OPT_STR_SET,
.off1 = offsetof(struct ioring_options, fixedbufs),
.help = "Pre map IO buffers",
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_IOURING,
},
{
.name = "registerfiles",
.lname = "Register file set",
.type = FIO_OPT_STR_SET,
.off1 = offsetof(struct ioring_options, registerfiles),
.help = "Pre-open/register files",
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_IOURING,
},
{
.name = "sqthread_poll",
.lname = "Kernel SQ thread polling",
.type = FIO_OPT_STR_SET,
.off1 = offsetof(struct ioring_options, sqpoll_thread),
.help = "Offload submission/completion to kernel thread",
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_IOURING,
},
{
.name = "sqthread_poll_cpu",
.lname = "SQ Thread Poll CPU",
.type = FIO_OPT_INT,
.cb = fio_ioring_sqpoll_cb,
.help = "What CPU to run SQ thread polling on",
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_IOURING,
},
{
.name = "nonvectored",
.lname = "Non-vectored",
.type = FIO_OPT_INT,
.off1 = offsetof(struct ioring_options, nonvectored),
.def = "-1",
.help = "Use non-vectored read/write commands",
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_IOURING,
},
{
.name = "uncached",
.lname = "Uncached",
.type = FIO_OPT_INT,
.off1 = offsetof(struct ioring_options, uncached),
.help = "Use RWF_UNCACHED for buffered read/writes",
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_IOURING,
},
{
.name = "nowait",
.lname = "RWF_NOWAIT",
.type = FIO_OPT_BOOL,
.off1 = offsetof(struct ioring_options, nowait),
.help = "Use RWF_NOWAIT for reads/writes",
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_IOURING,
},
{
.name = "force_async",
.lname = "Force async",
.type = FIO_OPT_INT,
.off1 = offsetof(struct ioring_options, force_async),
.help = "Set IOSQE_ASYNC every N requests",
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_IOURING,
},
{
.name = "cmd_type",
.lname = "Uring cmd type",
.type = FIO_OPT_STR,
.off1 = offsetof(struct ioring_options, cmd_type),
.help = "Specify uring-cmd type",
.def = "nvme",
.posval = {
{ .ival = "nvme",
.oval = FIO_URING_CMD_NVME,
.help = "Issue nvme-uring-cmd",
},
},
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_IOURING,
},
CMDPRIO_OPTIONS(struct ioring_options, FIO_OPT_G_IOURING),
{
.name = "md_per_io_size",
.lname = "Separate Metadata Buffer Size per I/O",
.type = FIO_OPT_INT,
.off1 = offsetof(struct ioring_options, md_per_io_size),
.def = "0",
.help = "Size of separate metadata buffer per I/O (Default: 0)",
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_IOURING,
},
{
.name = "pi_act",
.lname = "Protection Information Action",
.type = FIO_OPT_BOOL,
.off1 = offsetof(struct ioring_options, pi_act),
.def = "1",
.help = "Protection Information Action bit (pi_act=1 or pi_act=0)",
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_IOURING,
},
{
.name = "pi_chk",
.lname = "Protection Information Check",
.type = FIO_OPT_STR_STORE,
.off1 = offsetof(struct ioring_options, pi_chk),
.def = NULL,
.help = "Control of Protection Information Checking (pi_chk=GUARD,REFTAG,APPTAG)",
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_IOURING,
},
{
.name = "apptag",
.lname = "Application Tag used in Protection Information",
.type = FIO_OPT_INT,
.off1 = offsetof(struct ioring_options, apptag),
.def = "0x1234",
.help = "Application Tag used in Protection Information field (Default: 0x1234)",
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_IOURING,
},
{
.name = "apptag_mask",
.lname = "Application Tag Mask",
.type = FIO_OPT_INT,
.off1 = offsetof(struct ioring_options, apptag_mask),
.def = "0xffff",
.help = "Application Tag Mask used with Application Tag (Default: 0xffff)",
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_IOURING,
},
{
.name = NULL,
},
};
static int io_uring_enter(struct ioring_data *ld, unsigned int to_submit,
unsigned int min_complete, unsigned int flags)
{
#ifdef FIO_ARCH_HAS_SYSCALL
return __do_syscall6(__NR_io_uring_enter, ld->ring_fd, to_submit,
min_complete, flags, NULL, 0);
#else
return syscall(__NR_io_uring_enter, ld->ring_fd, to_submit,
min_complete, flags, NULL, 0);
#endif
}
static int fio_ioring_prep(struct thread_data *td, struct io_u *io_u)
{
struct ioring_data *ld = td->io_ops_data;
struct ioring_options *o = td->eo;
struct fio_file *f = io_u->file;
struct io_uring_sqe *sqe;
sqe = &ld->sqes[io_u->index];
if (o->registerfiles) {
sqe->fd = f->engine_pos;
sqe->flags = IOSQE_FIXED_FILE;
} else {
sqe->fd = f->fd;
sqe->flags = 0;
}
if (io_u->ddir == DDIR_READ || io_u->ddir == DDIR_WRITE) {
if (o->fixedbufs) {
sqe->opcode = fixed_ddir_to_op[io_u->ddir];
sqe->addr = (unsigned long) io_u->xfer_buf;
sqe->len = io_u->xfer_buflen;
sqe->buf_index = io_u->index;
} else {
struct iovec *iov = &ld->iovecs[io_u->index];
/*
* Update based on actual io_u, requeue could have
* adjusted these
*/
iov->iov_base = io_u->xfer_buf;
iov->iov_len = io_u->xfer_buflen;
sqe->opcode = ddir_to_op[io_u->ddir][!!o->nonvectored];
if (o->nonvectored) {
sqe->addr = (unsigned long) iov->iov_base;
sqe->len = iov->iov_len;
} else {
sqe->addr = (unsigned long) iov;
sqe->len = 1;
}
}
sqe->rw_flags = 0;
if (!td->o.odirect && o->uncached)
sqe->rw_flags |= RWF_UNCACHED;
if (o->nowait)
sqe->rw_flags |= RWF_NOWAIT;
/*
* Since io_uring can have a submission context (sqthread_poll)
* that is different from the process context, we cannot rely on
* the IO priority set by ioprio_set() (options prio, prioclass,
* and priohint) to be inherited.
* td->ioprio will have the value of the "default prio", so set
* this unconditionally. This value might get overridden by
* fio_ioring_cmdprio_prep() if the option cmdprio_percentage or
* cmdprio_bssplit is used.
*/
sqe->ioprio = td->ioprio;
sqe->off = io_u->offset;
} else if (ddir_sync(io_u->ddir)) {
sqe->ioprio = 0;
if (io_u->ddir == DDIR_SYNC_FILE_RANGE) {
sqe->off = f->first_write;
sqe->len = f->last_write - f->first_write;
sqe->sync_range_flags = td->o.sync_file_range;
sqe->opcode = IORING_OP_SYNC_FILE_RANGE;
} else {
sqe->off = 0;
sqe->addr = 0;
sqe->len = 0;
if (io_u->ddir == DDIR_DATASYNC)
sqe->fsync_flags |= IORING_FSYNC_DATASYNC;
sqe->opcode = IORING_OP_FSYNC;
}
}
if (o->force_async && ++ld->prepped == o->force_async) {
ld->prepped = 0;
sqe->flags |= IOSQE_ASYNC;
}
sqe->user_data = (unsigned long) io_u;
return 0;
}
static int fio_ioring_cmd_prep(struct thread_data *td, struct io_u *io_u)
{
struct ioring_data *ld = td->io_ops_data;
struct ioring_options *o = td->eo;
struct fio_file *f = io_u->file;
struct nvme_uring_cmd *cmd;
struct io_uring_sqe *sqe;
/* only supports nvme_uring_cmd */
if (o->cmd_type != FIO_URING_CMD_NVME)
return -EINVAL;
if (io_u->ddir == DDIR_TRIM && td->io_ops->flags & FIO_ASYNCIO_SYNC_TRIM)
return 0;
sqe = &ld->sqes[(io_u->index) << 1];
if (o->registerfiles) {
sqe->fd = f->engine_pos;
sqe->flags = IOSQE_FIXED_FILE;
} else {
sqe->fd = f->fd;
}
sqe->rw_flags = 0;
if (!td->o.odirect && o->uncached)
sqe->rw_flags |= RWF_UNCACHED;
if (o->nowait)
sqe->rw_flags |= RWF_NOWAIT;
sqe->opcode = IORING_OP_URING_CMD;
sqe->user_data = (unsigned long) io_u;
if (o->nonvectored)
sqe->cmd_op = NVME_URING_CMD_IO;
else
sqe->cmd_op = NVME_URING_CMD_IO_VEC;
if (o->force_async && ++ld->prepped == o->force_async) {
ld->prepped = 0;
sqe->flags |= IOSQE_ASYNC;
}
if (o->fixedbufs) {
sqe->uring_cmd_flags = IORING_URING_CMD_FIXED;
sqe->buf_index = io_u->index;
}
cmd = (struct nvme_uring_cmd *)sqe->cmd;
return fio_nvme_uring_cmd_prep(cmd, io_u,
o->nonvectored ? NULL : &ld->iovecs[io_u->index],
&ld->dsm[io_u->index]);
}
static struct io_u *fio_ioring_event(struct thread_data *td, int event)
{
struct ioring_data *ld = td->io_ops_data;
struct io_uring_cqe *cqe;
struct io_u *io_u;
unsigned index;
index = (event + ld->cq_ring_off) & ld->cq_ring_mask;
cqe = &ld->cq_ring.cqes[index];
io_u = (struct io_u *) (uintptr_t) cqe->user_data;
if (cqe->res != io_u->xfer_buflen) {
if (cqe->res > io_u->xfer_buflen)
io_u->error = -cqe->res;
else
io_u->resid = io_u->xfer_buflen - cqe->res;
} else
io_u->error = 0;
return io_u;
}
static struct io_u *fio_ioring_cmd_event(struct thread_data *td, int event)
{
struct ioring_data *ld = td->io_ops_data;
struct ioring_options *o = td->eo;
struct io_uring_cqe *cqe;
struct io_u *io_u;
struct nvme_data *data;
unsigned index;
int ret;
index = (event + ld->cq_ring_off) & ld->cq_ring_mask;
if (o->cmd_type == FIO_URING_CMD_NVME)
index <<= 1;
cqe = &ld->cq_ring.cqes[index];
io_u = (struct io_u *) (uintptr_t) cqe->user_data;
if (cqe->res != 0) {
io_u->error = -cqe->res;
return io_u;
} else {
io_u->error = 0;
}
if (o->cmd_type == FIO_URING_CMD_NVME) {
data = FILE_ENG_DATA(io_u->file);
if (data->pi_type && (io_u->ddir == DDIR_READ) && !o->pi_act) {
ret = fio_nvme_pi_verify(data, io_u);
if (ret)
io_u->error = ret;
}
}
return io_u;
}
static int fio_ioring_cqring_reap(struct thread_data *td, unsigned int events,
unsigned int max)
{
struct ioring_data *ld = td->io_ops_data;
struct io_cq_ring *ring = &ld->cq_ring;
unsigned head, reaped = 0;
head = *ring->head;
do {
if (head == atomic_load_acquire(ring->tail))
break;
reaped++;
head++;
} while (reaped + events < max);
if (reaped)
atomic_store_release(ring->head, head);
return reaped;
}
static int fio_ioring_getevents(struct thread_data *td, unsigned int min,
unsigned int max, const struct timespec *t)
{
struct ioring_data *ld = td->io_ops_data;
unsigned actual_min = td->o.iodepth_batch_complete_min == 0 ? 0 : min;
struct ioring_options *o = td->eo;
struct io_cq_ring *ring = &ld->cq_ring;
unsigned events = 0;
int r;
ld->cq_ring_off = *ring->head;
do {
r = fio_ioring_cqring_reap(td, events, max);
if (r) {
events += r;
max -= r;
if (actual_min != 0)
actual_min -= r;
continue;
}
if (!o->sqpoll_thread) {
r = io_uring_enter(ld, 0, actual_min,
IORING_ENTER_GETEVENTS);
if (r < 0) {
if (errno == EAGAIN || errno == EINTR)
continue;
r = -errno;
td_verror(td, errno, "io_uring_enter");
break;
}
}
} while (events < min);
return r < 0 ? r : events;
}
static inline void fio_ioring_cmd_nvme_pi(struct thread_data *td,
struct io_u *io_u)
{
struct ioring_data *ld = td->io_ops_data;
struct ioring_options *o = td->eo;
struct nvme_uring_cmd *cmd;
struct io_uring_sqe *sqe;
struct nvme_cmd_ext_io_opts ext_opts = {0};
struct nvme_data *data = FILE_ENG_DATA(io_u->file);
if (io_u->ddir == DDIR_TRIM)
return;
sqe = &ld->sqes[(io_u->index) << 1];
cmd = (struct nvme_uring_cmd *)sqe->cmd;
if (data->pi_type) {
if (o->pi_act)
ext_opts.io_flags |= NVME_IO_PRINFO_PRACT;
ext_opts.io_flags |= o->prchk;
ext_opts.apptag = o->apptag;
ext_opts.apptag_mask = o->apptag_mask;
}
fio_nvme_pi_fill(cmd, io_u, &ext_opts);
}
static inline void fio_ioring_cmdprio_prep(struct thread_data *td,
struct io_u *io_u)
{
struct ioring_data *ld = td->io_ops_data;
struct cmdprio *cmdprio = &ld->cmdprio;
if (fio_cmdprio_set_ioprio(td, cmdprio, io_u))
ld->sqes[io_u->index].ioprio = io_u->ioprio;
}
static enum fio_q_status fio_ioring_queue(struct thread_data *td,
struct io_u *io_u)
{
struct ioring_data *ld = td->io_ops_data;
struct ioring_options *o = td->eo;
struct io_sq_ring *ring = &ld->sq_ring;
unsigned tail, next_tail;
fio_ro_check(td, io_u);
if (ld->queued == ld->iodepth)
return FIO_Q_BUSY;
if (io_u->ddir == DDIR_TRIM && td->io_ops->flags & FIO_ASYNCIO_SYNC_TRIM) {
if (ld->queued)
return FIO_Q_BUSY;
do_io_u_trim(td, io_u);
io_u_mark_submit(td, 1);
io_u_mark_complete(td, 1);
return FIO_Q_COMPLETED;
}
tail = *ring->tail;
next_tail = tail + 1;
if (next_tail == atomic_load_relaxed(ring->head))
return FIO_Q_BUSY;
if (ld->cmdprio.mode != CMDPRIO_MODE_NONE)
fio_ioring_cmdprio_prep(td, io_u);
if (!strcmp(td->io_ops->name, "io_uring_cmd") &&
o->cmd_type == FIO_URING_CMD_NVME)
fio_ioring_cmd_nvme_pi(td, io_u);
ring->array[tail & ld->sq_ring_mask] = io_u->index;
atomic_store_release(ring->tail, next_tail);
ld->queued++;
return FIO_Q_QUEUED;
}
static void fio_ioring_queued(struct thread_data *td, int start, int nr)
{
struct ioring_data *ld = td->io_ops_data;
struct timespec now;
if (!fio_fill_issue_time(td))
return;
fio_gettime(&now, NULL);
while (nr--) {
struct io_sq_ring *ring = &ld->sq_ring;
int index = ring->array[start & ld->sq_ring_mask];
struct io_u *io_u = ld->io_u_index[index];
memcpy(&io_u->issue_time, &now, sizeof(now));
io_u_queued(td, io_u);
start++;
}
/*
* only used for iolog
*/
if (td->o.read_iolog_file)
memcpy(&td->last_issue, &now, sizeof(now));
}
static int fio_ioring_commit(struct thread_data *td)
{
struct ioring_data *ld = td->io_ops_data;
struct ioring_options *o = td->eo;
int ret;
if (!ld->queued)
return 0;
/*
* Kernel side does submission. just need to check if the ring is
* flagged as needing a kick, if so, call io_uring_enter(). This
* only happens if we've been idle too long.
*/
if (o->sqpoll_thread) {
struct io_sq_ring *ring = &ld->sq_ring;
unsigned start = *ld->sq_ring.tail - ld->queued;
unsigned flags;
flags = atomic_load_relaxed(ring->flags);
if (flags & IORING_SQ_NEED_WAKEUP)
io_uring_enter(ld, ld->queued, 0,
IORING_ENTER_SQ_WAKEUP);
fio_ioring_queued(td, start, ld->queued);
io_u_mark_submit(td, ld->queued);
ld->queued = 0;
return 0;
}
do {
unsigned start = *ld->sq_ring.head;
long nr = ld->queued;
ret = io_uring_enter(ld, nr, 0, IORING_ENTER_GETEVENTS);
if (ret > 0) {
fio_ioring_queued(td, start, ret);
io_u_mark_submit(td, ret);
ld->queued -= ret;
ret = 0;
} else if (!ret) {
io_u_mark_submit(td, ret);
continue;
} else {
if (errno == EAGAIN || errno == EINTR) {
ret = fio_ioring_cqring_reap(td, 0, ld->queued);
if (ret)
continue;
/* Shouldn't happen */
usleep(1);
continue;
}
ret = -errno;
td_verror(td, errno, "io_uring_enter submit");
break;
}
} while (ld->queued);
return ret;
}
static void fio_ioring_unmap(struct ioring_data *ld)
{
int i;
for (i = 0; i < FIO_ARRAY_SIZE(ld->mmap); i++)
munmap(ld->mmap[i].ptr, ld->mmap[i].len);
close(ld->ring_fd);
}
static void fio_ioring_cleanup(struct thread_data *td)
{
struct ioring_data *ld = td->io_ops_data;
if (ld) {
if (!(td->flags & TD_F_CHILD))
fio_ioring_unmap(ld);
fio_cmdprio_cleanup(&ld->cmdprio);
free(ld->io_u_index);
free(ld->md_buf);
free(ld->iovecs);
free(ld->fds);
free(ld->dsm);
free(ld);
}
}
static int fio_ioring_mmap(struct ioring_data *ld, struct io_uring_params *p)
{
struct io_sq_ring *sring = &ld->sq_ring;
struct io_cq_ring *cring = &ld->cq_ring;
void *ptr;
ld->mmap[0].len = p->sq_off.array + p->sq_entries * sizeof(__u32);
ptr = mmap(0, ld->mmap[0].len, PROT_READ | PROT_WRITE,
MAP_SHARED | MAP_POPULATE, ld->ring_fd,
IORING_OFF_SQ_RING);
ld->mmap[0].ptr = ptr;
sring->head = ptr + p->sq_off.head;
sring->tail = ptr + p->sq_off.tail;
sring->ring_mask = ptr + p->sq_off.ring_mask;
sring->ring_entries = ptr + p->sq_off.ring_entries;
sring->flags = ptr + p->sq_off.flags;
sring->array = ptr + p->sq_off.array;
ld->sq_ring_mask = *sring->ring_mask;
if (p->flags & IORING_SETUP_SQE128)
ld->mmap[1].len = 2 * p->sq_entries * sizeof(struct io_uring_sqe);
else
ld->mmap[1].len = p->sq_entries * sizeof(struct io_uring_sqe);
ld->sqes = mmap(0, ld->mmap[1].len, PROT_READ | PROT_WRITE,
MAP_SHARED | MAP_POPULATE, ld->ring_fd,
IORING_OFF_SQES);
ld->mmap[1].ptr = ld->sqes;
if (p->flags & IORING_SETUP_CQE32) {
ld->mmap[2].len = p->cq_off.cqes +
2 * p->cq_entries * sizeof(struct io_uring_cqe);
} else {
ld->mmap[2].len = p->cq_off.cqes +
p->cq_entries * sizeof(struct io_uring_cqe);
}
ptr = mmap(0, ld->mmap[2].len, PROT_READ | PROT_WRITE,
MAP_SHARED | MAP_POPULATE, ld->ring_fd,
IORING_OFF_CQ_RING);
ld->mmap[2].ptr = ptr;
cring->head = ptr + p->cq_off.head;
cring->tail = ptr + p->cq_off.tail;
cring->ring_mask = ptr + p->cq_off.ring_mask;
cring->ring_entries = ptr + p->cq_off.ring_entries;
cring->cqes = ptr + p->cq_off.cqes;
ld->cq_ring_mask = *cring->ring_mask;
return 0;
}
static void fio_ioring_probe(struct thread_data *td)
{
struct ioring_data *ld = td->io_ops_data;
struct ioring_options *o = td->eo;
struct io_uring_probe *p;
int ret;
/* already set by user, don't touch */
if (o->nonvectored != -1)
return;
/* default to off, as that's always safe */
o->nonvectored = 0;
p = calloc(1, sizeof(*p) + 256 * sizeof(struct io_uring_probe_op));
if (!p)
return;
ret = syscall(__NR_io_uring_register, ld->ring_fd,
IORING_REGISTER_PROBE, p, 256);
if (ret < 0)
goto out;
if (IORING_OP_WRITE > p->ops_len)
goto out;
if ((p->ops[IORING_OP_READ].flags & IO_URING_OP_SUPPORTED) &&
(p->ops[IORING_OP_WRITE].flags & IO_URING_OP_SUPPORTED))
o->nonvectored = 1;
out:
free(p);
}
static int fio_ioring_queue_init(struct thread_data *td)
{
struct ioring_data *ld = td->io_ops_data;
struct ioring_options *o = td->eo;
int depth = td->o.iodepth;
struct io_uring_params p;
int ret;
memset(&p, 0, sizeof(p));
if (o->hipri)
p.flags |= IORING_SETUP_IOPOLL;
if (o->sqpoll_thread) {
p.flags |= IORING_SETUP_SQPOLL;
if (o->sqpoll_set) {
p.flags |= IORING_SETUP_SQ_AFF;
p.sq_thread_cpu = o->sqpoll_cpu;
}
/*
* Submission latency for sqpoll_thread is just the time it
* takes to fill in the SQ ring entries, and any syscall if
* IORING_SQ_NEED_WAKEUP is set, we don't need to log that time
* separately.
*/
td->o.disable_slat = 1;
}
/*
* Clamp CQ ring size at our SQ ring size, we don't need more entries
* than that.
*/
p.flags |= IORING_SETUP_CQSIZE;
p.cq_entries = depth;
/*
* Setup COOP_TASKRUN as we don't need to get IPI interrupted for
* completing IO operations.
*/
p.flags |= IORING_SETUP_COOP_TASKRUN;
/*
* io_uring is always a single issuer, and we can defer task_work
* runs until we reap events.
*/
p.flags |= IORING_SETUP_SINGLE_ISSUER | IORING_SETUP_DEFER_TASKRUN;
retry:
ret = syscall(__NR_io_uring_setup, depth, &p);
if (ret < 0) {
if (errno == EINVAL && p.flags & IORING_SETUP_DEFER_TASKRUN) {
p.flags &= ~IORING_SETUP_DEFER_TASKRUN;
p.flags &= ~IORING_SETUP_SINGLE_ISSUER;
goto retry;
}
if (errno == EINVAL && p.flags & IORING_SETUP_COOP_TASKRUN) {
p.flags &= ~IORING_SETUP_COOP_TASKRUN;
goto retry;
}
if (errno == EINVAL && p.flags & IORING_SETUP_CQSIZE) {
p.flags &= ~IORING_SETUP_CQSIZE;
goto retry;
}
return ret;
}
ld->ring_fd = ret;
fio_ioring_probe(td);
if (o->fixedbufs) {
ret = syscall(__NR_io_uring_register, ld->ring_fd,
IORING_REGISTER_BUFFERS, ld->iovecs, depth);
if (ret < 0)
return ret;
}
return fio_ioring_mmap(ld, &p);
}
static int fio_ioring_cmd_queue_init(struct thread_data *td)
{
struct ioring_data *ld = td->io_ops_data;
struct ioring_options *o = td->eo;
int depth = td->o.iodepth;
struct io_uring_params p;
int ret;
memset(&p, 0, sizeof(p));
if (o->hipri)
p.flags |= IORING_SETUP_IOPOLL;
if (o->sqpoll_thread) {
p.flags |= IORING_SETUP_SQPOLL;
if (o->sqpoll_set) {
p.flags |= IORING_SETUP_SQ_AFF;
p.sq_thread_cpu = o->sqpoll_cpu;
}
/*
* Submission latency for sqpoll_thread is just the time it
* takes to fill in the SQ ring entries, and any syscall if
* IORING_SQ_NEED_WAKEUP is set, we don't need to log that time
* separately.
*/
td->o.disable_slat = 1;
}
if (o->cmd_type == FIO_URING_CMD_NVME) {
p.flags |= IORING_SETUP_SQE128;
p.flags |= IORING_SETUP_CQE32;
}
/*
* Clamp CQ ring size at our SQ ring size, we don't need more entries
* than that.
*/
p.flags |= IORING_SETUP_CQSIZE;
p.cq_entries = depth;
/*
* Setup COOP_TASKRUN as we don't need to get IPI interrupted for
* completing IO operations.
*/
p.flags |= IORING_SETUP_COOP_TASKRUN;
/*
* io_uring is always a single issuer, and we can defer task_work
* runs until we reap events.
*/
p.flags |= IORING_SETUP_SINGLE_ISSUER | IORING_SETUP_DEFER_TASKRUN;
retry:
ret = syscall(__NR_io_uring_setup, depth, &p);
if (ret < 0) {
if (errno == EINVAL && p.flags & IORING_SETUP_DEFER_TASKRUN) {
p.flags &= ~IORING_SETUP_DEFER_TASKRUN;
p.flags &= ~IORING_SETUP_SINGLE_ISSUER;
goto retry;
}
if (errno == EINVAL && p.flags & IORING_SETUP_COOP_TASKRUN) {
p.flags &= ~IORING_SETUP_COOP_TASKRUN;
goto retry;
}
if (errno == EINVAL && p.flags & IORING_SETUP_CQSIZE) {
p.flags &= ~IORING_SETUP_CQSIZE;
goto retry;
}
return ret;
}
ld->ring_fd = ret;
fio_ioring_probe(td);
if (o->fixedbufs) {
ret = syscall(__NR_io_uring_register, ld->ring_fd,
IORING_REGISTER_BUFFERS, ld->iovecs, depth);
if (ret < 0)
return ret;
}
return fio_ioring_mmap(ld, &p);
}
static int fio_ioring_register_files(struct thread_data *td)
{
struct ioring_data *ld = td->io_ops_data;
struct fio_file *f;
unsigned int i;
int ret;
ld->fds = calloc(td->o.nr_files, sizeof(int));
for_each_file(td, f, i) {
ret = generic_open_file(td, f);