a6dbe3721e
per Intel policy to include file commit date using git cmd below. The policy does not apply to non-Intel (C) notices. git log --follow -C90% --format=%ad --date default <file> | tail -1 and then pull just the 4 digit year from the result. Intel copyrights were not added to files where Intel either had no contribution ot the contribution lacked substance (ie license header updates, formatting changes, etc). Contribution date used "--follow -C95%" to get the most accurate date. Note that several files in this patch didn't end the license/(c) block with a blank comment line so these were added as the vast majority of files do have this last blank line. Simply there for consistency. Signed-off-by: paul luse <paul.e.luse@intel.com> Change-Id: Id5b7ce4f658fe87132f14139ead58d6e285c04d4 Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/15192 Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com> Reviewed-by: Ben Walker <benjamin.walker@intel.com> Community-CI: Mellanox Build Bot
100 lines
2.0 KiB
C
100 lines
2.0 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
|
|
* Copyright (C) 2021 Intel Corporation.
|
|
* All rights reserved.
|
|
*/
|
|
|
|
#ifndef __SGL_INTERNAL_H__
|
|
#define __SGL_INTERNAL_H__
|
|
|
|
#include "spdk/stdinc.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
struct spdk_iov_sgl {
|
|
struct iovec *iov;
|
|
int iovcnt;
|
|
uint32_t iov_offset;
|
|
uint32_t total_size;
|
|
};
|
|
|
|
/**
|
|
* Initialize struct spdk_iov_sgl with iov, iovcnt and iov_offset.
|
|
*
|
|
* \param s the spdk_iov_sgl to be filled.
|
|
* \param iov the io vector to fill the s
|
|
* \param iovcnt the size the iov
|
|
* \param iov_offset the current filled iov_offset for s.
|
|
*/
|
|
|
|
static inline void
|
|
spdk_iov_sgl_init(struct spdk_iov_sgl *s, struct iovec *iov, int iovcnt,
|
|
uint32_t iov_offset)
|
|
{
|
|
s->iov = iov;
|
|
s->iovcnt = iovcnt;
|
|
s->iov_offset = iov_offset;
|
|
s->total_size = 0;
|
|
}
|
|
|
|
/**
|
|
* Consume the iovs in spdk_iov_sgl with passed bytes
|
|
*
|
|
* \param s the spdk_iov_sgl which contains the iov
|
|
* \param step the bytes_size consumed.
|
|
*/
|
|
|
|
static inline void
|
|
spdk_iov_sgl_advance(struct spdk_iov_sgl *s, uint32_t step)
|
|
{
|
|
s->iov_offset += step;
|
|
while (s->iovcnt > 0) {
|
|
assert(s->iov != NULL);
|
|
if (s->iov_offset < s->iov->iov_len) {
|
|
break;
|
|
}
|
|
|
|
s->iov_offset -= s->iov->iov_len;
|
|
s->iov++;
|
|
s->iovcnt--;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Append the data to the struct spdk_iov_sgl pointed by s
|
|
*
|
|
* \param s the address of the struct spdk_iov_sgl
|
|
* \param data the data buffer to be appended
|
|
* \param data_len the length of the data.
|
|
*
|
|
* \return true if all the data is appended.
|
|
*/
|
|
|
|
static inline bool
|
|
spdk_iov_sgl_append(struct spdk_iov_sgl *s, uint8_t *data, uint32_t data_len)
|
|
{
|
|
if (s->iov_offset >= data_len) {
|
|
s->iov_offset -= data_len;
|
|
} else {
|
|
assert(s->iovcnt > 0);
|
|
s->iov->iov_base = data + s->iov_offset;
|
|
s->iov->iov_len = data_len - s->iov_offset;
|
|
s->total_size += data_len - s->iov_offset;
|
|
s->iov_offset = 0;
|
|
s->iov++;
|
|
s->iovcnt--;
|
|
if (s->iovcnt == 0) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* __SGL_INTERNAL_H__ */
|