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|
/*
Unix SMB/Netbios implementation.
Version 3.0
async_io read handling using POSIX async io.
Copyright (C) Jeremy Allison 2005.
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 Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "smbd/smbd.h"
#include "smbd/globals.h"
#include "../lib/util/tevent_ntstatus.h"
#if defined(HAVE_AIO)
/****************************************************************************
The buffer we keep around whilst an aio request is in process.
*****************************************************************************/
struct aio_extra {
files_struct *fsp;
struct smb_request *smbreq;
DATA_BLOB outbuf;
struct lock_struct lock;
size_t nbyte;
off_t offset;
bool write_through;
};
/****************************************************************************
Accessor function to return write_through state.
*****************************************************************************/
bool aio_write_through_requested(struct aio_extra *aio_ex)
{
return aio_ex->write_through;
}
bool initialize_async_io_handler(void)
{
return true;
}
static int aio_extra_destructor(struct aio_extra *aio_ex)
{
outstanding_aio_calls--;
return 0;
}
/****************************************************************************
Create the extended aio struct we must keep around for the lifetime
of the aio call.
*****************************************************************************/
static struct aio_extra *create_aio_extra(TALLOC_CTX *mem_ctx,
files_struct *fsp,
size_t buflen)
{
struct aio_extra *aio_ex = talloc_zero(mem_ctx, struct aio_extra);
if (!aio_ex) {
return NULL;
}
/* The output buffer stored in the aio_ex is the start of
the smb return buffer. The buffer used in the acb
is the start of the reply data portion of that buffer. */
if (buflen) {
aio_ex->outbuf = data_blob_talloc(aio_ex, NULL, buflen);
if (!aio_ex->outbuf.data) {
TALLOC_FREE(aio_ex);
return NULL;
}
}
talloc_set_destructor(aio_ex, aio_extra_destructor);
aio_ex->fsp = fsp;
outstanding_aio_calls++;
return aio_ex;
}
struct aio_req_fsp_link {
files_struct *fsp;
struct tevent_req *req;
};
static int aio_del_req_from_fsp(struct aio_req_fsp_link *lnk)
{
unsigned i;
files_struct *fsp = lnk->fsp;
struct tevent_req *req = lnk->req;
for (i=0; i<fsp->num_aio_requests; i++) {
if (fsp->aio_requests[i] == req) {
break;
}
}
if (i == fsp->num_aio_requests) {
DEBUG(1, ("req %p not found in fsp %p\n", req, fsp));
return 0;
}
fsp->num_aio_requests -= 1;
fsp->aio_requests[i] = fsp->aio_requests[fsp->num_aio_requests];
return 0;
}
static bool aio_add_req_to_fsp(files_struct *fsp, struct tevent_req *req)
{
size_t array_len;
struct aio_req_fsp_link *lnk;
lnk = talloc(req, struct aio_req_fsp_link);
if (lnk == NULL) {
return false;
}
array_len = talloc_array_length(fsp->aio_requests);
if (array_len <= fsp->num_aio_requests) {
struct tevent_req **tmp;
tmp = talloc_realloc(
fsp, fsp->aio_requests, struct tevent_req *,
fsp->num_aio_requests+1);
if (tmp == NULL) {
TALLOC_FREE(lnk);
return false;
}
fsp->aio_requests = tmp;
}
fsp->aio_requests[fsp->num_aio_requests] = req;
fsp->num_aio_requests += 1;
lnk->fsp = fsp;
lnk->req = req;
talloc_set_destructor(lnk, aio_del_req_from_fsp);
return true;
}
static void aio_pread_smb1_done(struct tevent_req *req);
/****************************************************************************
Set up an aio request from a SMBreadX call.
*****************************************************************************/
NTSTATUS schedule_aio_read_and_X(connection_struct *conn,
struct smb_request *smbreq,
files_struct *fsp, off_t startpos,
size_t smb_maxcnt)
{
struct aio_extra *aio_ex;
size_t bufsize;
size_t min_aio_read_size = lp_aio_read_size(SNUM(conn));
struct tevent_req *req;
if (fsp->base_fsp != NULL) {
/* No AIO on streams yet */
DEBUG(10, ("AIO on streams not yet supported\n"));
return NT_STATUS_RETRY;
}
if ((!min_aio_read_size || (smb_maxcnt < min_aio_read_size))
&& !SMB_VFS_AIO_FORCE(fsp)) {
/* Too small a read for aio request. */
DEBUG(10,("schedule_aio_read_and_X: read size (%u) too small "
"for minimum aio_read of %u\n",
(unsigned int)smb_maxcnt,
(unsigned int)min_aio_read_size ));
return NT_STATUS_RETRY;
}
/* Only do this on non-chained and non-chaining reads not using the
* write cache. */
if (req_is_in_chain(smbreq) || (lp_write_cache_size(SNUM(conn)) != 0)) {
return NT_STATUS_RETRY;
}
if (outstanding_aio_calls >= aio_pending_size) {
DEBUG(10,("schedule_aio_read_and_X: Already have %d aio "
"activities outstanding.\n",
outstanding_aio_calls ));
return NT_STATUS_RETRY;
}
/* The following is safe from integer wrap as we've already checked
smb_maxcnt is 128k or less. Wct is 12 for read replies */
bufsize = smb_size + 12 * 2 + smb_maxcnt;
if ((aio_ex = create_aio_extra(NULL, fsp, bufsize)) == NULL) {
DEBUG(10,("schedule_aio_read_and_X: malloc fail.\n"));
return NT_STATUS_NO_MEMORY;
}
construct_reply_common_req(smbreq, (char *)aio_ex->outbuf.data);
srv_set_message((char *)aio_ex->outbuf.data, 12, 0, True);
SCVAL(aio_ex->outbuf.data,smb_vwv0,0xFF); /* Never a chained reply. */
init_strict_lock_struct(fsp, (uint64_t)smbreq->smbpid,
(uint64_t)startpos, (uint64_t)smb_maxcnt, READ_LOCK,
&aio_ex->lock);
/* Take the lock until the AIO completes. */
if (!SMB_VFS_STRICT_LOCK(conn, fsp, &aio_ex->lock)) {
TALLOC_FREE(aio_ex);
return NT_STATUS_FILE_LOCK_CONFLICT;
}
aio_ex->nbyte = smb_maxcnt;
aio_ex->offset = startpos;
req = SMB_VFS_PREAD_SEND(aio_ex, fsp->conn->sconn->ev_ctx,
fsp, smb_buf(aio_ex->outbuf.data),
smb_maxcnt, startpos);
if (req == NULL) {
DEBUG(0,("schedule_aio_read_and_X: aio_read failed. "
"Error %s\n", strerror(errno) ));
SMB_VFS_STRICT_UNLOCK(conn, fsp, &aio_ex->lock);
TALLOC_FREE(aio_ex);
return NT_STATUS_RETRY;
}
tevent_req_set_callback(req, aio_pread_smb1_done, aio_ex);
if (!aio_add_req_to_fsp(fsp, req)) {
DEBUG(1, ("Could not add req to fsp\n"));
SMB_VFS_STRICT_UNLOCK(conn, fsp, &aio_ex->lock);
TALLOC_FREE(aio_ex);
return NT_STATUS_RETRY;
}
aio_ex->smbreq = talloc_move(aio_ex, &smbreq);
DEBUG(10,("schedule_aio_read_and_X: scheduled aio_read for file %s, "
"offset %.0f, len = %u (mid = %u)\n",
fsp_str_dbg(fsp), (double)startpos, (unsigned int)smb_maxcnt,
(unsigned int)aio_ex->smbreq->mid ));
return NT_STATUS_OK;
}
static void aio_pread_smb1_done(struct tevent_req *req)
{
struct aio_extra *aio_ex = tevent_req_callback_data(
req, struct aio_extra);
files_struct *fsp = aio_ex->fsp;
int outsize;
char *outbuf = (char *)aio_ex->outbuf.data;
char *data = smb_buf(outbuf);
ssize_t nread;
int err;
nread = SMB_VFS_PREAD_RECV(req, &err);
TALLOC_FREE(req);
DEBUG(10, ("pread_recv returned %d, err = %s\n", (int)nread,
(nread == -1) ? strerror(err) : "no error"));
if (fsp == NULL) {
DEBUG( 3, ("aio_pread_smb1_done: file closed whilst "
"aio outstanding (mid[%llu]).\n",
(unsigned long long)aio_ex->smbreq->mid));
TALLOC_FREE(aio_ex);
return;
}
/* Unlock now we're done. */
SMB_VFS_STRICT_UNLOCK(fsp->conn, fsp, &aio_ex->lock);
if (nread < 0) {
DEBUG( 3, ("handle_aio_read_complete: file %s nread == %d. "
"Error = %s\n", fsp_str_dbg(fsp), (int)nread,
strerror(err)));
ERROR_NT(map_nt_error_from_unix(err));
outsize = srv_set_message(outbuf,0,0,true);
} else {
outsize = srv_set_message(outbuf, 12, nread, False);
SSVAL(outbuf,smb_vwv2, 0xFFFF); /* Remaining - must be * -1. */
SSVAL(outbuf,smb_vwv5, nread);
SSVAL(outbuf,smb_vwv6, smb_offset(data,outbuf));
SSVAL(outbuf,smb_vwv7, ((nread >> 16) & 1));
SSVAL(smb_buf(outbuf), -2, nread);
aio_ex->fsp->fh->pos = aio_ex->offset + nread;
aio_ex->fsp->fh->position_information = aio_ex->fsp->fh->pos;
DEBUG( 3, ("handle_aio_read_complete file %s max=%d "
"nread=%d\n", fsp_str_dbg(fsp),
(int)aio_ex->nbyte, (int)nread ) );
}
smb_setlen(outbuf, outsize - 4);
show_msg(outbuf);
if (!srv_send_smb(aio_ex->smbreq->sconn, outbuf,
true, aio_ex->smbreq->seqnum+1,
IS_CONN_ENCRYPTED(fsp->conn), NULL)) {
exit_server_cleanly("handle_aio_read_complete: srv_send_smb "
"failed.");
}
DEBUG(10, ("handle_aio_read_complete: scheduled aio_read completed "
"for file %s, offset %.0f, len = %u\n",
fsp_str_dbg(fsp), (double)aio_ex->offset,
(unsigned int)nread));
TALLOC_FREE(aio_ex);
}
static void aio_pwrite_smb1_done(struct tevent_req *req);
/****************************************************************************
Set up an aio request from a SMBwriteX call.
*****************************************************************************/
NTSTATUS schedule_aio_write_and_X(connection_struct *conn,
struct smb_request *smbreq,
files_struct *fsp, const char *data,
off_t startpos,
size_t numtowrite)
{
struct aio_extra *aio_ex;
size_t bufsize;
size_t min_aio_write_size = lp_aio_write_size(SNUM(conn));
struct tevent_req *req;
if (fsp->base_fsp != NULL) {
/* No AIO on streams yet */
DEBUG(10, ("AIO on streams not yet supported\n"));
return NT_STATUS_RETRY;
}
if ((!min_aio_write_size || (numtowrite < min_aio_write_size))
&& !SMB_VFS_AIO_FORCE(fsp)) {
/* Too small a write for aio request. */
DEBUG(10,("schedule_aio_write_and_X: write size (%u) too "
"small for minimum aio_write of %u\n",
(unsigned int)numtowrite,
(unsigned int)min_aio_write_size ));
return NT_STATUS_RETRY;
}
/* Only do this on non-chained and non-chaining writes not using the
* write cache. */
if (req_is_in_chain(smbreq) || (lp_write_cache_size(SNUM(conn)) != 0)) {
return NT_STATUS_RETRY;
}
if (outstanding_aio_calls >= aio_pending_size) {
DEBUG(3,("schedule_aio_write_and_X: Already have %d aio "
"activities outstanding.\n",
outstanding_aio_calls ));
DEBUG(10,("schedule_aio_write_and_X: failed to schedule "
"aio_write for file %s, offset %.0f, len = %u "
"(mid = %u)\n",
fsp_str_dbg(fsp), (double)startpos,
(unsigned int)numtowrite,
(unsigned int)smbreq->mid ));
return NT_STATUS_RETRY;
}
bufsize = smb_size + 6*2;
if (!(aio_ex = create_aio_extra(NULL, fsp, bufsize))) {
DEBUG(0,("schedule_aio_write_and_X: malloc fail.\n"));
return NT_STATUS_NO_MEMORY;
}
aio_ex->write_through = BITSETW(smbreq->vwv+7,0);
construct_reply_common_req(smbreq, (char *)aio_ex->outbuf.data);
srv_set_message((char *)aio_ex->outbuf.data, 6, 0, True);
SCVAL(aio_ex->outbuf.data,smb_vwv0,0xFF); /* Never a chained reply. */
init_strict_lock_struct(fsp, (uint64_t)smbreq->smbpid,
(uint64_t)startpos, (uint64_t)numtowrite, WRITE_LOCK,
&aio_ex->lock);
/* Take the lock until the AIO completes. */
if (!SMB_VFS_STRICT_LOCK(conn, fsp, &aio_ex->lock)) {
TALLOC_FREE(aio_ex);
return NT_STATUS_FILE_LOCK_CONFLICT;
}
aio_ex->nbyte = numtowrite;
aio_ex->offset = startpos;
req = SMB_VFS_PWRITE_SEND(aio_ex, fsp->conn->sconn->ev_ctx, fsp,
data, numtowrite, startpos);
if (req == NULL) {
DEBUG(3,("schedule_aio_wrote_and_X: aio_write failed. "
"Error %s\n", strerror(errno) ));
SMB_VFS_STRICT_UNLOCK(conn, fsp, &aio_ex->lock);
TALLOC_FREE(aio_ex);
return NT_STATUS_RETRY;
}
tevent_req_set_callback(req, aio_pwrite_smb1_done, aio_ex);
if (!aio_add_req_to_fsp(fsp, req)) {
DEBUG(1, ("Could not add req to fsp\n"));
SMB_VFS_STRICT_UNLOCK(conn, fsp, &aio_ex->lock);
TALLOC_FREE(aio_ex);
return NT_STATUS_RETRY;
}
aio_ex->smbreq = talloc_move(aio_ex, &smbreq);
/* This should actually be improved to span the write. */
contend_level2_oplocks_begin(fsp, LEVEL2_CONTEND_WRITE);
contend_level2_oplocks_end(fsp, LEVEL2_CONTEND_WRITE);
if (!aio_ex->write_through && !lp_syncalways(SNUM(fsp->conn))
&& fsp->aio_write_behind) {
/* Lie to the client and immediately claim we finished the
* write. */
SSVAL(aio_ex->outbuf.data,smb_vwv2,numtowrite);
SSVAL(aio_ex->outbuf.data,smb_vwv4,(numtowrite>>16)&1);
show_msg((char *)aio_ex->outbuf.data);
if (!srv_send_smb(aio_ex->smbreq->sconn,
(char *)aio_ex->outbuf.data,
true, aio_ex->smbreq->seqnum+1,
IS_CONN_ENCRYPTED(fsp->conn),
&aio_ex->smbreq->pcd)) {
exit_server_cleanly("schedule_aio_write_and_X: "
"srv_send_smb failed.");
}
DEBUG(10,("schedule_aio_write_and_X: scheduled aio_write "
"behind for file %s\n", fsp_str_dbg(fsp)));
}
DEBUG(10,("schedule_aio_write_and_X: scheduled aio_write for file "
"%s, offset %.0f, len = %u (mid = %u) "
"outstanding_aio_calls = %d\n",
fsp_str_dbg(fsp), (double)startpos, (unsigned int)numtowrite,
(unsigned int)aio_ex->smbreq->mid, outstanding_aio_calls ));
return NT_STATUS_OK;
}
static void aio_pwrite_smb1_done(struct tevent_req *req)
{
struct aio_extra *aio_ex = tevent_req_callback_data(
req, struct aio_extra);
files_struct *fsp = aio_ex->fsp;
char *outbuf = (char *)aio_ex->outbuf.data;
ssize_t numtowrite = aio_ex->nbyte;
ssize_t nwritten;
int err;
nwritten = SMB_VFS_PWRITE_RECV(req, &err);
TALLOC_FREE(req);
DEBUG(10, ("pwrite_recv returned %d, err = %s\n", (int)nwritten,
(nwritten == -1) ? strerror(err) : "no error"));
if (fsp == NULL) {
DEBUG( 3, ("aio_pwrite_smb1_done: file closed whilst "
"aio outstanding (mid[%llu]).\n",
(unsigned long long)aio_ex->smbreq->mid));
TALLOC_FREE(aio_ex);
return;
}
/* Unlock now we're done. */
SMB_VFS_STRICT_UNLOCK(fsp->conn, fsp, &aio_ex->lock);
if (fsp->aio_write_behind) {
if (nwritten != numtowrite) {
if (nwritten == -1) {
DEBUG(5,("handle_aio_write_complete: "
"aio_write_behind failed ! File %s "
"is corrupt ! Error %s\n",
fsp_str_dbg(fsp), strerror(err)));
} else {
DEBUG(0,("handle_aio_write_complete: "
"aio_write_behind failed ! File %s "
"is corrupt ! Wanted %u bytes but "
"only wrote %d\n", fsp_str_dbg(fsp),
(unsigned int)numtowrite,
(int)nwritten ));
}
} else {
DEBUG(10,("handle_aio_write_complete: "
"aio_write_behind completed for file %s\n",
fsp_str_dbg(fsp)));
}
/* TODO: should no return success in case of an error !!! */
TALLOC_FREE(aio_ex);
return;
}
/* We don't need outsize or set_message here as we've already set the
fixed size length when we set up the aio call. */
if (nwritten == -1) {
DEBUG(3, ("handle_aio_write: file %s wanted %u bytes. "
"nwritten == %d. Error = %s\n",
fsp_str_dbg(fsp), (unsigned int)numtowrite,
(int)nwritten, strerror(err)));
ERROR_NT(map_nt_error_from_unix(err));
srv_set_message(outbuf,0,0,true);
} else {
NTSTATUS status;
SSVAL(outbuf,smb_vwv2,nwritten);
SSVAL(outbuf,smb_vwv4,(nwritten>>16)&1);
if (nwritten < (ssize_t)numtowrite) {
SCVAL(outbuf,smb_rcls,ERRHRD);
SSVAL(outbuf,smb_err,ERRdiskfull);
}
DEBUG(3,("handle_aio_write: %s, num=%d wrote=%d\n",
fsp_fnum_dbg(fsp), (int)numtowrite, (int)nwritten));
status = sync_file(fsp->conn,fsp, aio_ex->write_through);
if (!NT_STATUS_IS_OK(status)) {
ERROR_BOTH(map_nt_error_from_unix(errno),
ERRHRD, ERRdiskfull);
srv_set_message(outbuf,0,0,true);
DEBUG(5, ("handle_aio_write: sync_file for %s "
"returned %s\n",
fsp_str_dbg(fsp), nt_errstr(status)));
}
aio_ex->fsp->fh->pos = aio_ex->offset + nwritten;
}
show_msg(outbuf);
if (!srv_send_smb(aio_ex->smbreq->sconn, outbuf,
true, aio_ex->smbreq->seqnum+1,
IS_CONN_ENCRYPTED(fsp->conn),
NULL)) {
exit_server_cleanly("handle_aio_write_complete: "
"srv_send_smb failed.");
}
DEBUG(10, ("handle_aio_write_complete: scheduled aio_write completed "
"for file %s, offset %.0f, requested %u, written = %u\n",
fsp_str_dbg(fsp), (double)aio_ex->offset,
(unsigned int)numtowrite, (unsigned int)nwritten));
TALLOC_FREE(aio_ex);
}
bool cancel_smb2_aio(struct smb_request *smbreq)
{
struct smbd_smb2_request *smb2req = smbreq->smb2req;
struct aio_extra *aio_ex = NULL;
if (smb2req) {
aio_ex = talloc_get_type(smbreq->async_priv,
struct aio_extra);
}
if (aio_ex == NULL) {
return false;
}
if (aio_ex->fsp == NULL) {
return false;
}
/*
* We let the aio request run. Setting fsp to NULL has the
* effect that the _done routines don't send anything out.
*/
aio_ex->fsp = NULL;
return true;
}
static void aio_pread_smb2_done(struct tevent_req *req);
/****************************************************************************
Set up an aio request from a SMB2 read call.
*****************************************************************************/
NTSTATUS schedule_smb2_aio_read(connection_struct *conn,
struct smb_request *smbreq,
files_struct *fsp,
TALLOC_CTX *ctx,
DATA_BLOB *preadbuf,
off_t startpos,
size_t smb_maxcnt)
{
struct aio_extra *aio_ex;
size_t min_aio_read_size = lp_aio_read_size(SNUM(conn));
struct tevent_req *req;
if (fsp->base_fsp != NULL) {
/* No AIO on streams yet */
DEBUG(10, ("AIO on streams not yet supported\n"));
return NT_STATUS_RETRY;
}
if ((!min_aio_read_size || (smb_maxcnt < min_aio_read_size))
&& !SMB_VFS_AIO_FORCE(fsp)) {
/* Too small a read for aio request. */
DEBUG(10,("smb2: read size (%u) too small "
"for minimum aio_read of %u\n",
(unsigned int)smb_maxcnt,
(unsigned int)min_aio_read_size ));
return NT_STATUS_RETRY;
}
/* Only do this on reads not using the write cache. */
if (lp_write_cache_size(SNUM(conn)) != 0) {
return NT_STATUS_RETRY;
}
if (outstanding_aio_calls >= aio_pending_size) {
DEBUG(10,("smb2: Already have %d aio "
"activities outstanding.\n",
outstanding_aio_calls ));
return NT_STATUS_RETRY;
}
/* Create the out buffer. */
*preadbuf = data_blob_talloc(ctx, NULL, smb_maxcnt);
if (preadbuf->data == NULL) {
return NT_STATUS_NO_MEMORY;
}
if (!(aio_ex = create_aio_extra(smbreq->smb2req, fsp, 0))) {
return NT_STATUS_NO_MEMORY;
}
init_strict_lock_struct(fsp, (uint64_t)smbreq->smbpid,
(uint64_t)startpos, (uint64_t)smb_maxcnt, READ_LOCK,
&aio_ex->lock);
/* Take the lock until the AIO completes. */
if (!SMB_VFS_STRICT_LOCK(conn, fsp, &aio_ex->lock)) {
TALLOC_FREE(aio_ex);
return NT_STATUS_FILE_LOCK_CONFLICT;
}
aio_ex->nbyte = smb_maxcnt;
aio_ex->offset = startpos;
req = SMB_VFS_PREAD_SEND(aio_ex, fsp->conn->sconn->ev_ctx, fsp,
preadbuf->data, smb_maxcnt, startpos);
if (req == NULL) {
DEBUG(0, ("smb2: SMB_VFS_PREAD_SEND failed. "
"Error %s\n", strerror(errno)));
SMB_VFS_STRICT_UNLOCK(conn, fsp, &aio_ex->lock);
TALLOC_FREE(aio_ex);
return NT_STATUS_RETRY;
}
tevent_req_set_callback(req, aio_pread_smb2_done, aio_ex);
if (!aio_add_req_to_fsp(fsp, req)) {
DEBUG(1, ("Could not add req to fsp\n"));
SMB_VFS_STRICT_UNLOCK(conn, fsp, &aio_ex->lock);
TALLOC_FREE(aio_ex);
return NT_STATUS_RETRY;
}
/* We don't need talloc_move here as both aio_ex and
* smbreq are children of smbreq->smb2req. */
aio_ex->smbreq = smbreq;
smbreq->async_priv = aio_ex;
DEBUG(10,("smb2: scheduled aio_read for file %s, "
"offset %.0f, len = %u (mid = %u)\n",
fsp_str_dbg(fsp), (double)startpos, (unsigned int)smb_maxcnt,
(unsigned int)aio_ex->smbreq->mid ));
return NT_STATUS_OK;
}
static void aio_pread_smb2_done(struct tevent_req *req)
{
struct aio_extra *aio_ex = tevent_req_callback_data(
req, struct aio_extra);
struct tevent_req *subreq = aio_ex->smbreq->smb2req->subreq;
files_struct *fsp = aio_ex->fsp;
NTSTATUS status;
ssize_t nread;
int err = 0;
nread = SMB_VFS_PREAD_RECV(req, &err);
TALLOC_FREE(req);
DEBUG(10, ("pread_recv returned %d, err = %s\n", (int)nread,
(nread == -1) ? strerror(err) : "no error"));
if (fsp == NULL) {
DEBUG( 3, ("aio_pread_smb2_done: file closed whilst "
"aio outstanding (mid[%llu]).\n",
(unsigned long long)aio_ex->smbreq->mid));
TALLOC_FREE(aio_ex);
return;
}
/* Unlock now we're done. */
SMB_VFS_STRICT_UNLOCK(fsp->conn, fsp, &aio_ex->lock);
/* Common error or success code processing for async or sync
read returns. */
status = smb2_read_complete(subreq, nread, err);
if (nread > 0) {
fsp->fh->pos = aio_ex->offset + nread;
fsp->fh->position_information = fsp->fh->pos;
}
DEBUG(10, ("smb2: scheduled aio_read completed "
"for file %s, offset %.0f, len = %u "
"(errcode = %d, NTSTATUS = %s)\n",
fsp_str_dbg(aio_ex->fsp),
(double)aio_ex->offset,
(unsigned int)nread,
err, nt_errstr(status)));
if (!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(subreq, status);
return;
}
tevent_req_done(subreq);
}
static void aio_pwrite_smb2_done(struct tevent_req *req);
/****************************************************************************
Set up an aio request from a SMB2write call.
*****************************************************************************/
NTSTATUS schedule_aio_smb2_write(connection_struct *conn,
struct smb_request *smbreq,
files_struct *fsp,
uint64_t in_offset,
DATA_BLOB in_data,
bool write_through)
{
struct aio_extra *aio_ex = NULL;
size_t min_aio_write_size = lp_aio_write_size(SNUM(conn));
struct tevent_req *req;
if (fsp->base_fsp != NULL) {
/* No AIO on streams yet */
DEBUG(10, ("AIO on streams not yet supported\n"));
return NT_STATUS_RETRY;
}
if ((!min_aio_write_size || (in_data.length < min_aio_write_size))
&& !SMB_VFS_AIO_FORCE(fsp)) {
/* Too small a write for aio request. */
DEBUG(10,("smb2: write size (%u) too "
"small for minimum aio_write of %u\n",
(unsigned int)in_data.length,
(unsigned int)min_aio_write_size ));
return NT_STATUS_RETRY;
}
/* Only do this on writes not using the write cache. */
if (lp_write_cache_size(SNUM(conn)) != 0) {
return NT_STATUS_RETRY;
}
if (outstanding_aio_calls >= aio_pending_size) {
DEBUG(3,("smb2: Already have %d aio "
"activities outstanding.\n",
outstanding_aio_calls ));
return NT_STATUS_RETRY;
}
if (!(aio_ex = create_aio_extra(smbreq->smb2req, fsp, 0))) {
return NT_STATUS_NO_MEMORY;
}
aio_ex->write_through = write_through;
init_strict_lock_struct(fsp, (uint64_t)smbreq->smbpid,
in_offset, (uint64_t)in_data.length, WRITE_LOCK,
&aio_ex->lock);
/* Take the lock until the AIO completes. */
if (!SMB_VFS_STRICT_LOCK(conn, fsp, &aio_ex->lock)) {
TALLOC_FREE(aio_ex);
return NT_STATUS_FILE_LOCK_CONFLICT;
}
aio_ex->nbyte = in_data.length;
aio_ex->offset = in_offset;
req = SMB_VFS_PWRITE_SEND(aio_ex, fsp->conn->sconn->ev_ctx, fsp,
in_data.data, in_data.length, in_offset);
if (req == NULL) {
DEBUG(3, ("smb2: SMB_VFS_PWRITE_SEND failed. "
"Error %s\n", strerror(errno)));
SMB_VFS_STRICT_UNLOCK(conn, fsp, &aio_ex->lock);
TALLOC_FREE(aio_ex);
return NT_STATUS_RETRY;
}
tevent_req_set_callback(req, aio_pwrite_smb2_done, aio_ex);
if (!aio_add_req_to_fsp(fsp, req)) {
DEBUG(1, ("Could not add req to fsp\n"));
SMB_VFS_STRICT_UNLOCK(conn, fsp, &aio_ex->lock);
TALLOC_FREE(aio_ex);
return NT_STATUS_RETRY;
}
/* We don't need talloc_move here as both aio_ex and
* smbreq are children of smbreq->smb2req. */
aio_ex->smbreq = smbreq;
smbreq->async_priv = aio_ex;
/* This should actually be improved to span the write. */
contend_level2_oplocks_begin(fsp, LEVEL2_CONTEND_WRITE);
contend_level2_oplocks_end(fsp, LEVEL2_CONTEND_WRITE);
/*
* We don't want to do write behind due to ownership
* issues of the request structs. Maybe add it if I
* figure those out. JRA.
*/
DEBUG(10,("smb2: scheduled aio_write for file "
"%s, offset %.0f, len = %u (mid = %u) "
"outstanding_aio_calls = %d\n",
fsp_str_dbg(fsp),
(double)in_offset,
(unsigned int)in_data.length,
(unsigned int)aio_ex->smbreq->mid,
outstanding_aio_calls ));
return NT_STATUS_OK;
}
static void aio_pwrite_smb2_done(struct tevent_req *req)
{
struct aio_extra *aio_ex = tevent_req_callback_data(
req, struct aio_extra);
ssize_t numtowrite = aio_ex->nbyte;
struct tevent_req *subreq = aio_ex->smbreq->smb2req->subreq;
files_struct *fsp = aio_ex->fsp;
NTSTATUS status;
ssize_t nwritten;
int err = 0;
nwritten = SMB_VFS_PWRITE_RECV(req, &err);
TALLOC_FREE(req);
DEBUG(10, ("pwrite_recv returned %d, err = %s\n", (int)nwritten,
(nwritten == -1) ? strerror(err) : "no error"));
if (fsp == NULL) {
DEBUG( 3, ("aio_pwrite_smb2_done: file closed whilst "
"aio outstanding (mid[%llu]).\n",
(unsigned long long)aio_ex->smbreq->mid));
TALLOC_FREE(aio_ex);
return;
}
/* Unlock now we're done. */
SMB_VFS_STRICT_UNLOCK(fsp->conn, fsp, &aio_ex->lock);
status = smb2_write_complete(subreq, nwritten, err);
DEBUG(10, ("smb2: scheduled aio_write completed "
"for file %s, offset %.0f, requested %u, "
"written = %u (errcode = %d, NTSTATUS = %s)\n",
fsp_str_dbg(fsp),
(double)aio_ex->offset,
(unsigned int)numtowrite,
(unsigned int)nwritten,
err, nt_errstr(status)));
if (!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(subreq, status);
return;
}
tevent_req_done(subreq);
}
/****************************************************************************
Handle any aio completion inline.
*****************************************************************************/
void smbd_aio_complete_aio_ex(struct aio_extra *aio_ex)
{
return;
}
void aio_fsp_close(files_struct *fsp)
{
unsigned i;
for (i=0; i<fsp->num_aio_requests; i++) {
struct tevent_req *req = fsp->aio_requests[i];
struct aio_extra *aio_ex = tevent_req_callback_data(
req, struct aio_extra);
aio_ex->fsp = NULL;
}
}
#else
bool initialize_async_io_handler(void)
{
return false;
}
NTSTATUS schedule_aio_read_and_X(connection_struct *conn,
struct smb_request *smbreq,
files_struct *fsp, off_t startpos,
size_t smb_maxcnt)
{
return NT_STATUS_RETRY;
}
NTSTATUS schedule_aio_write_and_X(connection_struct *conn,
struct smb_request *smbreq,
files_struct *fsp, const char *data,
off_t startpos,
size_t numtowrite)
{
return NT_STATUS_RETRY;
}
bool cancel_smb2_aio(struct smb_request *smbreq)
{
return false;
}
NTSTATUS schedule_smb2_aio_read(connection_struct *conn,
struct smb_request *smbreq,
files_struct *fsp,
TALLOC_CTX *ctx,
DATA_BLOB *preadbuf,
off_t startpos,
size_t smb_maxcnt)
{
return NT_STATUS_RETRY;
}
NTSTATUS schedule_aio_smb2_write(connection_struct *conn,
struct smb_request *smbreq,
files_struct *fsp,
uint64_t in_offset,
DATA_BLOB in_data,
bool write_through)
{
return NT_STATUS_RETRY;
}
void aio_fsp_close(files_struct *fsp)
{
return;
}
int wait_for_aio_completion(files_struct *fsp)
{
return 0;
}
void smbd_aio_complete_mid(uint64_t mid);
#endif
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