/*
* Custom fio(1) engine that submits synchronous atomic writes to file.
*
- * Copyright (C) 2012 Fusion-io, Inc.
- * Author: Santhosh Kumar Koundinya.
+ * Copyright (C) 2013 Fusion-io, Inc.
+ * Author: Santhosh Kumar Koundinya (skoundinya@fusionio.com).
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
#include "../fio.h"
-#ifdef FIO_HAVE_FUSION_AW
+#include <nvm/nvm_primitives.h>
-#include <vsl_dp_experimental/vectored_write.h>
+#define NUM_ATOMIC_CAPABILITIES (5)
-/* Fix sector size to 512 bytes independent of actual sector size, just like
- * the linux kernel. */
-#define SECTOR_SHIFT 9
-#define SECTOR_SIZE (1U<<SECTOR_SHIFT)
-
-struct acs_file_data {
- struct vsl_iovec iov[IO_VECTOR_LIMIT];
+struct fas_data {
+ nvm_handle_t nvm_handle;
+ size_t xfer_buf_align;
+ size_t xfer_buflen_align;
+ size_t xfer_buflen_max;
+ size_t sector_size;
};
static int queue(struct thread_data *td, struct io_u *io_u)
{
int rc;
- int iov_index;
- off_t offset;
- char *xfer_buf;
- size_t xfer_buflen;
- struct acs_file_data *d = io_u->file->file_data;
+ struct fas_data *d = (struct fas_data *) io_u->file->engine_data;
if (io_u->ddir != DDIR_WRITE) {
- td_vmsg(td, -EIO, "only writes supported", "io_u->ddir");
- rc = -EIO;
+ td_vmsg(td, EINVAL, "only writes supported", "io_u->ddir");
+ rc = -EINVAL;
goto out;
}
- if (io_u->xfer_buflen > IO_SIZE_MAX) {
- td_vmsg(td, -EIO, "data too big", "io_u->xfer_buflen");
- rc = -EIO;
+
+ if ((size_t) io_u->xfer_buf % d->xfer_buf_align) {
+ td_vmsg(td, EINVAL, "unaligned data buffer", "io_u->xfer_buf");
+ rc = -EINVAL;
goto out;
}
- if (io_u->xfer_buflen & (SECTOR_SIZE - 1)) {
- td_vmsg(td, -EIO, "unaligned data size", "io_u->xfer_buflen");
- rc = -EIO;
+
+ if (io_u->xfer_buflen % d->xfer_buflen_align) {
+ td_vmsg(td, EINVAL, "unaligned data size", "io_u->xfer_buflen");
+ rc = -EINVAL;
goto out;
}
- /* Chop up the write into minimal number of iovec's necessary */
- iov_index = 0;
- offset = io_u->offset;
- xfer_buf = io_u->xfer_buf;
- xfer_buflen = io_u->xfer_buflen;
- while (xfer_buflen) {
- struct vsl_iovec *iov = &d->iov[iov_index++];
-
- iov->iov_len = xfer_buflen > IO_VECTOR_MAX_SIZE ?
- IO_VECTOR_MAX_SIZE : xfer_buflen;
- iov->iov_base = (uint64_t) xfer_buf;
- iov->sector = offset >> SECTOR_SHIFT;
- iov->iov_flag = VSL_IOV_WRITE;
-
- offset += iov->iov_len;
- xfer_buf += iov->iov_len;
- xfer_buflen -= iov->iov_len;
+ if (io_u->xfer_buflen > d->xfer_buflen_max) {
+ td_vmsg(td, EINVAL, "data too big", "io_u->xfer_buflen");
+ rc = -EINVAL;
+ goto out;
}
- assert(xfer_buflen == 0);
- assert(iov_index <= IO_VECTOR_LIMIT);
- rc = vsl_vectored_write(io_u->file->fd, d->iov, iov_index, O_ATOMIC);
+ rc = nvm_atomic_write(d->nvm_handle, (uint64_t) io_u->xfer_buf,
+ io_u->xfer_buflen, io_u->offset / d->sector_size);
if (rc == -1) {
- td_verror(td, -errno, "vsl_vectored_write");
- rc = -EIO;
+ td_verror(td, errno, "nvm_atomic_write");
+ rc = -errno;
goto out;
- } else {
- io_u->error = 0;
- io_u->file->file_pos = io_u->offset + rc;
- rc = FIO_Q_COMPLETED;
}
-
+ rc = FIO_Q_COMPLETED;
out:
if (rc < 0)
- io_u->error = rc;
+ io_u->error = -rc;
return rc;
}
static int open_file(struct thread_data *td, struct fio_file *f)
{
int rc;
- struct acs_file_data *d = NULL;
+ int fio_unused close_file_rc;
+ struct fas_data *d;
+ nvm_version_t nvm_version;
+ nvm_capability_t nvm_capability[NUM_ATOMIC_CAPABILITIES];
+
d = malloc(sizeof(*d));
if (!d) {
- td_verror(td, -ENOMEM, "malloc");
- rc = -ENOMEM;
+ td_verror(td, ENOMEM, "malloc");
+ rc = ENOMEM;
goto error;
}
- f->file_data = d;
+ d->nvm_handle = -1;
+ f->engine_data = (uintptr_t) d;
rc = generic_open_file(td, f);
+ if (rc)
+ goto free_engine_data;
+
+ /* Set the version of the library as seen when engine is compiled */
+ nvm_version.major = NVM_PRIMITIVES_API_MAJOR;
+ nvm_version.minor = NVM_PRIMITIVES_API_MINOR;
+ nvm_version.micro = NVM_PRIMITIVES_API_MICRO;
+
+ d->nvm_handle = nvm_get_handle(f->fd, &nvm_version);
+ if (d->nvm_handle == -1) {
+ td_vmsg(td, errno, "nvm_get_handle failed", "nvm_get_handle");
+ rc = errno;
+ goto close_file;
+ }
+
+ nvm_capability[0].cap_id = NVM_CAP_ATOMIC_WRITE_START_ALIGN_ID;
+ nvm_capability[1].cap_id = NVM_CAP_ATOMIC_WRITE_MULTIPLICITY_ID;
+ nvm_capability[2].cap_id = NVM_CAP_ATOMIC_WRITE_MAX_VECTOR_SIZE_ID;
+ nvm_capability[3].cap_id = NVM_CAP_SECTOR_SIZE_ID;
+ nvm_capability[4].cap_id = NVM_CAP_ATOMIC_MAX_IOV_ID;
+ rc = nvm_get_capabilities(d->nvm_handle, nvm_capability,
+ NUM_ATOMIC_CAPABILITIES, false);
+ if (rc == -1) {
+ td_vmsg(td, errno, "error in getting atomic write capabilities", "nvm_get_capabilities");
+ rc = errno;
+ goto close_file;
+ } else if (rc < NUM_ATOMIC_CAPABILITIES) {
+ td_vmsg(td, EINVAL, "couldn't get all the atomic write capabilities" , "nvm_get_capabilities");
+ rc = ECANCELED;
+ goto close_file;
+ }
+ /* Reset rc to 0 because we got all capabilities we needed */
+ rc = 0;
+ d->xfer_buf_align = nvm_capability[0].cap_value;
+ d->xfer_buflen_align = nvm_capability[1].cap_value;
+ d->xfer_buflen_max = d->xfer_buflen_align * nvm_capability[2].cap_value * nvm_capability[4].cap_value;
+ d->sector_size = nvm_capability[3].cap_value;
+
out:
return rc;
-
+close_file:
+ close_file_rc = generic_close_file(td, f);
+free_engine_data:
+ free(d);
error:
f->fd = -1;
- f->file_data = NULL;
- if (d)
- free(d);
-
+ f->engine_data = 0;
goto out;
}
static int close_file(struct thread_data *td, struct fio_file *f)
{
- if (f->file_data) {
- free(f->file_data);
- f->file_data = NULL;
+ struct fas_data *d = (struct fas_data *) f->engine_data;
+
+ if (d) {
+ if (d->nvm_handle != -1)
+ nvm_release_handle(d->nvm_handle);
+ free(d);
+ f->engine_data = 0;
}
return generic_close_file(td, f);
.flags = FIO_SYNCIO | FIO_RAWIO | FIO_MEMALIGN
};
-#else /* !FUSION_HAVE_FUSION_AW */
-
-static int fio_fusion_aw_eng_init(struct thread_data fio_unused *td)
-{
- log_err("fio: fusion atomic write engine not available\n");
- return 1;
-}
-
-static struct ioengine_ops ioengine = {
- .name = "fusion-aw-sync",
- .version = FIO_IOOPS_VERSION,
- .init = fio_fusion_aw_eng_init,
-};
-
-#endif /* FUSION_HAVE_FUSION_AW */
-
static void fio_init fio_fusion_aw_init(void)
{
register_ioengine(&ioengine);