bool push_blocking_lock_request( struct byte_range_lock *br_lck,
struct smb_request *req,
files_struct *fsp,
int lock_timeout,
int lock_num,
uint32_t lock_pid,
enum brl_type lock_type,
enum brl_flavour lock_flav,
uint64_t offset,
uint64_t count,
uint32_t blocking_pid)
{
struct blocking_lock_record *blr;
NTSTATUS status;
if(req_is_in_chain(req)) {
DEBUG(0,("push_blocking_lock_request: cannot queue a chained request (currently).\n"));
return False;
}
/*
* Now queue an entry on the blocking lock queue. We setup
* the expiration time here.
*/
blr = talloc(NULL, struct blocking_lock_record);
if (blr == NULL) {
DEBUG(0,("push_blocking_lock_request: Malloc fail !\n" ));
return False;
}
blr->next = NULL;
blr->prev = NULL;
blr->fsp = fsp;
if (lock_timeout == -1) {
blr->expire_time.tv_sec = 0;
blr->expire_time.tv_usec = 0; /* Never expire. */
} else {
blr->expire_time = timeval_current_ofs(lock_timeout/1000,
(lock_timeout % 1000) * 1000);
}
blr->lock_num = lock_num;
blr->lock_pid = lock_pid;
blr->blocking_pid = blocking_pid;
blr->lock_flav = lock_flav;
blr->lock_type = lock_type;
blr->offset = offset;
blr->count = count;
/* Specific brl_lock() implementations can fill this in. */
blr->blr_private = NULL;
/* Add a pending lock record for this. */
status = brl_lock(smbd_messaging_context(),
br_lck,
lock_pid,
procid_self(),
offset,
count,
lock_type == READ_LOCK ? PENDING_READ_LOCK : PENDING_WRITE_LOCK,
blr->lock_flav,
lock_timeout ? True : False, /* blocking_lock. */
NULL,
blr);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("push_blocking_lock_request: failed to add PENDING_LOCK record.\n"));
TALLOC_FREE(blr);
return False;
}
SMB_PERFCOUNT_DEFER_OP(&req->pcd, &req->pcd);
blr->req = talloc_move(blr, &req);
DLIST_ADD_END(blocking_lock_queue, blr, struct blocking_lock_record *);
recalc_brl_timeout();
/* Ensure we'll receive messages when this is unlocked. */
if (!blocking_lock_unlock_state) {
messaging_register(smbd_messaging_context(), NULL,
MSG_SMB_UNLOCK, received_unlock_msg);
blocking_lock_unlock_state = true;
}
DEBUG(3,("push_blocking_lock_request: lock request blocked with "
"expiry time (%u sec. %u usec) (+%d msec) for fnum = %d, name = %s\n",
(unsigned int)blr->expire_time.tv_sec,
(unsigned int)blr->expire_time.tv_usec, lock_timeout,
blr->fsp->fnum, blr->fsp->fsp_name ));
return True;
}
NTSTATUS schedule_aio_write_and_X(connection_struct *conn,
struct smb_request *smbreq,
files_struct *fsp, const char *data,
SMB_OFF_T startpos,
size_t numtowrite)
{
struct aio_extra *aio_ex;
SMB_STRUCT_AIOCB *a;
size_t bufsize;
size_t min_aio_write_size = lp_aio_write_size(SNUM(conn));
int ret;
/* Ensure aio is initialized. */
if (!initialize_async_io_handler()) {
return NT_STATUS_RETRY;
}
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->handle_completion = handle_aio_write_complete;
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;
}
a = &aio_ex->acb;
/* Now set up the aio record for the write call. */
a->aio_fildes = fsp->fh->fd;
a->aio_buf = discard_const_p(char, data);
a->aio_nbytes = numtowrite;
a->aio_offset = startpos;
a->aio_sigevent.sigev_notify = SIGEV_SIGNAL;
a->aio_sigevent.sigev_signo = RT_SIGNAL_AIO;
a->aio_sigevent.sigev_value.sival_ptr = aio_ex;
ret = SMB_VFS_AIO_WRITE(fsp, a);
if (ret == -1) {
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;
}
outstanding_aio_calls++;
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)));
}
bool push_blocking_lock_request( struct byte_range_lock *br_lck,
struct smb_request *req,
files_struct *fsp,
int lock_timeout,
int lock_num,
uint64_t smblctx,
enum brl_type lock_type,
enum brl_flavour lock_flav,
uint64_t offset,
uint64_t count,
uint64_t blocking_smblctx)
{
struct smbd_server_connection *sconn = req->sconn;
struct blocking_lock_record *blr;
NTSTATUS status;
if (req->smb2req) {
return push_blocking_lock_request_smb2(br_lck,
req,
fsp,
lock_timeout,
lock_num,
smblctx,
lock_type,
lock_flav,
offset,
count,
blocking_smblctx);
}
if(req_is_in_chain(req)) {
DEBUG(0,("push_blocking_lock_request: cannot queue a chained request (currently).\n"));
return False;
}
/*
* Now queue an entry on the blocking lock queue. We setup
* the expiration time here.
*/
blr = talloc(NULL, struct blocking_lock_record);
if (blr == NULL) {
DEBUG(0,("push_blocking_lock_request: Malloc fail !\n" ));
return False;
}
blr->next = NULL;
blr->prev = NULL;
blr->fsp = fsp;
if (lock_timeout == -1) {
blr->expire_time.tv_sec = 0;
blr->expire_time.tv_usec = 0; /* Never expire. */
} else {
blr->expire_time = timeval_current_ofs_msec(lock_timeout);
}
blr->lock_num = lock_num;
blr->smblctx = smblctx;
blr->blocking_smblctx = blocking_smblctx;
blr->lock_flav = lock_flav;
blr->lock_type = lock_type;
blr->offset = offset;
blr->count = count;
/* Specific brl_lock() implementations can fill this in. */
blr->blr_private = NULL;
/* Add a pending lock record for this. */
status = brl_lock(req->sconn->msg_ctx,
br_lck,
smblctx,
messaging_server_id(req->sconn->msg_ctx),
offset,
count,
lock_type == READ_LOCK ? PENDING_READ_LOCK : PENDING_WRITE_LOCK,
blr->lock_flav,
True,
NULL,
blr);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("push_blocking_lock_request: failed to add PENDING_LOCK record.\n"));
TALLOC_FREE(blr);
return False;
}
SMB_PERFCOUNT_DEFER_OP(&req->pcd, &req->pcd);
blr->req = talloc_move(blr, &req);
DLIST_ADD_END(sconn->smb1.locks.blocking_lock_queue, blr, struct blocking_lock_record *);
recalc_brl_timeout(sconn);
/* Ensure we'll receive messages when this is unlocked. */
if (!sconn->smb1.locks.blocking_lock_unlock_state) {
messaging_register(sconn->msg_ctx, sconn,
MSG_SMB_UNLOCK, received_unlock_msg);
sconn->smb1.locks.blocking_lock_unlock_state = true;
}
DEBUG(3,("push_blocking_lock_request: lock request blocked with "
"expiry time (%u sec. %u usec) (+%d msec) for %s, name = %s\n",
(unsigned int)blr->expire_time.tv_sec,
(unsigned int)blr->expire_time.tv_usec, lock_timeout,
fsp_fnum_dbg(blr->fsp), fsp_str_dbg(blr->fsp)));
return True;
}
NTSTATUS schedule_aio_read_and_X(connection_struct *conn,
struct smb_request *smbreq,
files_struct *fsp, SMB_OFF_T startpos,
size_t smb_maxcnt)
{
struct aio_extra *aio_ex;
SMB_STRUCT_AIOCB *a;
size_t bufsize;
size_t min_aio_read_size = lp_aio_read_size(SNUM(conn));
int ret;
/* Ensure aio is initialized. */
if (!initialize_async_io_handler()) {
return NT_STATUS_RETRY;
}
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;
}
aio_ex->handle_completion = handle_aio_read_complete;
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;
}
a = &aio_ex->acb;
/* Now set up the aio record for the read call. */
a->aio_fildes = fsp->fh->fd;
a->aio_buf = smb_buf(aio_ex->outbuf.data);
a->aio_nbytes = smb_maxcnt;
a->aio_offset = startpos;
a->aio_sigevent.sigev_notify = SIGEV_SIGNAL;
a->aio_sigevent.sigev_signo = RT_SIGNAL_AIO;
a->aio_sigevent.sigev_value.sival_ptr = aio_ex;
ret = SMB_VFS_AIO_READ(fsp, a);
if (ret == -1) {
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;
}
outstanding_aio_calls++;
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;
}
