/* 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/globals.h" #if defined(WITH_AIO) /* The signal we'll use to signify aio done. */ #ifndef RT_SIGNAL_AIO #define RT_SIGNAL_AIO (SIGRTMIN+3) #endif #ifndef HAVE_STRUCT_SIGEVENT_SIGEV_VALUE_SIVAL_PTR #ifdef HAVE_STRUCT_SIGEVENT_SIGEV_VALUE_SIGVAL_PTR #define sival_int sigval_int #define sival_ptr sigval_ptr #endif #endif /**************************************************************************** The buffer we keep around whilst an aio request is in process. *****************************************************************************/ struct aio_extra { struct aio_extra *next, *prev; SMB_STRUCT_AIOCB acb; files_struct *fsp; struct smb_request *smbreq; DATA_BLOB outbuf; struct lock_struct lock; bool write_through; int (*handle_completion)(struct aio_extra *ex, int errcode); }; /**************************************************************************** Initialize the signal handler for aio read/write. *****************************************************************************/ static void smbd_aio_signal_handler(struct tevent_context *ev_ctx, struct tevent_signal *se, int signum, int count, void *_info, void *private_data) { siginfo_t *info = (siginfo_t *)_info; struct aio_extra *aio_ex = (struct aio_extra *) info->si_value.sival_ptr; smbd_aio_complete_aio_ex(aio_ex); } static bool initialize_async_io_handler(void) { static bool tried_signal_setup = false; if (aio_signal_event) { return true; } if (tried_signal_setup) { return false; } tried_signal_setup = true; aio_signal_event = tevent_add_signal(smbd_event_context(), smbd_event_context(), RT_SIGNAL_AIO, SA_SIGINFO, smbd_aio_signal_handler, NULL); if (!aio_signal_event) { DEBUG(10, ("Failed to setup RT_SIGNAL_AIO handler\n")); return false; } /* tevent supports 100 signal with SA_SIGINFO */ aio_pending_size = 100; return true; } static int handle_aio_read_complete(struct aio_extra *aio_ex, int errcode); static int handle_aio_write_complete(struct aio_extra *aio_ex, int errcode); static int handle_aio_smb2_read_complete(struct aio_extra *aio_ex, int errcode); static int handle_aio_smb2_write_complete(struct aio_extra *aio_ex, int errcode); static int aio_extra_destructor(struct aio_extra *aio_ex) { DLIST_REMOVE(aio_list_head, aio_ex); 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_P(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; } } DLIST_ADD(aio_list_head, aio_ex); talloc_set_destructor(aio_ex, aio_extra_destructor); aio_ex->fsp = fsp; return aio_ex; } /**************************************************************************** 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, 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; } /**************************************************************************** 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, 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 = 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(smbd_server_fd(),(char *)aio_ex->outbuf.data, true, aio_ex->smbreq->seqnum+1, IS_CONN_ENCRYPTED(fsp->conn), &aio_ex->smbreq->pcd)) { exit_server_cleanly("handle_aio_write: 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; } /**************************************************************************** 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, char *inbuf, SMB_OFF_T startpos, size_t smb_maxcnt) { struct aio_extra *aio_ex; SMB_STRUCT_AIOCB *a; 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,("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; } if (!(aio_ex = create_aio_extra(smbreq->smb2req, fsp, 0))) { return NT_STATUS_NO_MEMORY; } aio_ex->handle_completion = handle_aio_smb2_read_complete; 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 = inbuf; 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,("smb2: 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++; /* We don't need talloc_move here as both aio_ex and * smbreq are children of smbreq->smb2req. */ aio_ex->smbreq = smbreq; 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; } /**************************************************************************** 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; SMB_STRUCT_AIOCB *a = NULL; 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 || (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->handle_completion = handle_aio_smb2_write_complete; 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; } a = &aio_ex->acb; /* Now set up the aio record for the write call. */ a->aio_fildes = fsp->fh->fd; a->aio_buf = in_data.data; a->aio_nbytes = in_data.length; a->aio_offset = in_offset; 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,("smb2: 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++; /* We don't need talloc_move here as both aio_ex and * smbreq are children of smbreq->smb2req. */ aio_ex->smbreq = 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); /* * 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; } /**************************************************************************** Complete the read and return the data or error back to the client. Returns errno or zero if all ok. *****************************************************************************/ static int handle_aio_read_complete(struct aio_extra *aio_ex, int errcode) { int outsize; char *outbuf = (char *)aio_ex->outbuf.data; char *data = smb_buf(outbuf); ssize_t nread = SMB_VFS_AIO_RETURN(aio_ex->fsp,&aio_ex->acb); if (nread < 0) { /* We're relying here on the fact that if the fd is closed then the aio will complete and aio_return will return an error. Hopefully this is true.... JRA. */ DEBUG( 3,( "handle_aio_read_complete: file %s nread == %d. " "Error = %s\n", fsp_str_dbg(aio_ex->fsp), (int)nread, strerror(errcode))); ERROR_NT(map_nt_error_from_unix(errcode)); 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->acb.aio_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(aio_ex->fsp), (int)aio_ex->acb.aio_nbytes, (int)nread ) ); } smb_setlen(outbuf,outsize - 4); show_msg(outbuf); if (!srv_send_smb(smbd_server_fd(),outbuf, true, aio_ex->smbreq->seqnum+1, IS_CONN_ENCRYPTED(aio_ex->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(aio_ex->fsp), (double)aio_ex->acb.aio_offset, (unsigned int)nread )); return errcode; } /**************************************************************************** Complete the write and return the data or error back to the client. Returns error code or zero if all ok. *****************************************************************************/ static int handle_aio_write_complete(struct aio_extra *aio_ex, int errcode) { files_struct *fsp = aio_ex->fsp; char *outbuf = (char *)aio_ex->outbuf.data; ssize_t numtowrite = aio_ex->acb.aio_nbytes; ssize_t nwritten = SMB_VFS_AIO_RETURN(fsp,&aio_ex->acb); 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(errcode))); } 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 )); errcode = EIO; } } else { DEBUG(10,("handle_aio_write_complete: " "aio_write_behind completed for file %s\n", fsp_str_dbg(fsp))); } /* TODO: should no return 0 in case of an error !!! */ return 0; } /* 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(errcode) )); ERROR_NT(map_nt_error_from_unix(errcode)); 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: fnum=%d num=%d wrote=%d\n", fsp->fnum, (int)numtowrite, (int)nwritten)); status = sync_file(fsp->conn,fsp, aio_ex->write_through); if (!NT_STATUS_IS_OK(status)) { errcode = errno; ERROR_BOTH(map_nt_error_from_unix(errcode), 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->acb.aio_offset + nwritten; } show_msg(outbuf); if (!srv_send_smb(smbd_server_fd(),outbuf, true, aio_ex->smbreq->seqnum+1, IS_CONN_ENCRYPTED(fsp->conn), NULL)) { exit_server_cleanly("handle_aio_write: 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->acb.aio_offset, (unsigned int)numtowrite, (unsigned int)nwritten )); return errcode; } /**************************************************************************** Complete the read and return the data or error back to the client. Returns errno or zero if all ok. *****************************************************************************/ static int handle_aio_smb2_read_complete(struct aio_extra *aio_ex, int errcode) { NTSTATUS status; struct tevent_req *subreq = aio_ex->smbreq->smb2req->subreq; ssize_t nread = SMB_VFS_AIO_RETURN(aio_ex->fsp,&aio_ex->acb); /* Common error or success code processing for async or sync read returns. */ status = smb2_read_complete(subreq, nread, errcode); if (nread > 0) { aio_ex->fsp->fh->pos = aio_ex->acb.aio_offset + nread; aio_ex->fsp->fh->position_information = aio_ex->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->acb.aio_offset, (unsigned int)nread, errcode, nt_errstr(status) )); if (!NT_STATUS_IS_OK(status)) { tevent_req_nterror(subreq, status); } tevent_req_done(subreq); return errcode; } /**************************************************************************** Complete the SMB2 write and return the data or error back to the client. Returns error code or zero if all ok. *****************************************************************************/ static int handle_aio_smb2_write_complete(struct aio_extra *aio_ex, int errcode) { files_struct *fsp = aio_ex->fsp; ssize_t numtowrite = aio_ex->acb.aio_nbytes; ssize_t nwritten = SMB_VFS_AIO_RETURN(fsp,&aio_ex->acb); struct tevent_req *subreq = aio_ex->smbreq->smb2req->subreq; NTSTATUS status; status = smb2_write_complete(subreq, nwritten, errcode); 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->acb.aio_offset, (unsigned int)numtowrite, (unsigned int)nwritten, errcode, nt_errstr(status) )); if (!NT_STATUS_IS_OK(status)) { tevent_req_nterror(subreq, status); } tevent_req_done(subreq); return errcode; } /**************************************************************************** Handle any aio completion. Returns True if finished (and sets *perr if err was non-zero), False if not. *****************************************************************************/ static bool handle_aio_completed(struct aio_extra *aio_ex, int *perr) { files_struct *fsp = NULL; int err; if(!aio_ex) { DEBUG(3, ("handle_aio_completed: Non-existing aio_ex passed\n")); return false; } fsp = aio_ex->fsp; /* Ensure the operation has really completed. */ err = SMB_VFS_AIO_ERROR(fsp, &aio_ex->acb); if (err == EINPROGRESS) { DEBUG(10,( "handle_aio_completed: operation mid %llu still in " "process for file %s\n", (unsigned long long)aio_ex->smbreq->mid, fsp_str_dbg(aio_ex->fsp))); return False; } /* Unlock now we're done. */ SMB_VFS_STRICT_UNLOCK(fsp->conn, fsp, &aio_ex->lock); if (err == ECANCELED) { /* If error is ECANCELED then don't return anything to the * client. */ DEBUG(10,( "handle_aio_completed: operation mid %llu" " canceled\n", (unsigned long long)aio_ex->smbreq->mid)); return True; } err = aio_ex->handle_completion(aio_ex, err); if (err) { *perr = err; /* Only save non-zero errors. */ } return True; } /**************************************************************************** Handle any aio completion inline. *****************************************************************************/ void smbd_aio_complete_aio_ex(struct aio_extra *aio_ex) { files_struct *fsp = NULL; int ret = 0; outstanding_aio_calls--; DEBUG(10,("smbd_aio_complete_mid: mid[%llu]\n", (unsigned long long)aio_ex->smbreq->mid)); fsp = aio_ex->fsp; if (fsp == NULL) { /* file was closed whilst I/O was outstanding. Just * ignore. */ DEBUG( 3,( "smbd_aio_complete_mid: file closed whilst " "aio outstanding (mid[%llu]).\n", (unsigned long long)aio_ex->smbreq->mid)); return; } if (!handle_aio_completed(aio_ex, &ret)) { return; } TALLOC_FREE(aio_ex); } /**************************************************************************** We're doing write behind and the client closed the file. Wait up to 30 seconds (my arbitrary choice) for the aio to complete. Return 0 if all writes completed, errno to return if not. *****************************************************************************/ #define SMB_TIME_FOR_AIO_COMPLETE_WAIT 29 int wait_for_aio_completion(files_struct *fsp) { struct aio_extra *aio_ex; const SMB_STRUCT_AIOCB **aiocb_list; int aio_completion_count = 0; time_t start_time = time(NULL); int seconds_left; for (seconds_left = SMB_TIME_FOR_AIO_COMPLETE_WAIT; seconds_left >= 0;) { int err = 0; int i; struct timespec ts; aio_completion_count = 0; for( aio_ex = aio_list_head; aio_ex; aio_ex = aio_ex->next) { if (aio_ex->fsp == fsp) { aio_completion_count++; } } if (!aio_completion_count) { return 0; } DEBUG(3,("wait_for_aio_completion: waiting for %d aio events " "to complete.\n", aio_completion_count )); aiocb_list = SMB_MALLOC_ARRAY(const SMB_STRUCT_AIOCB *, aio_completion_count); if (!aiocb_list) { return ENOMEM; } for( i = 0, aio_ex = aio_list_head; aio_ex; aio_ex = aio_ex->next) { if (aio_ex->fsp == fsp) { aiocb_list[i++] = &aio_ex->acb; } } /* Now wait up to seconds_left for completion. */ ts.tv_sec = seconds_left; ts.tv_nsec = 0; DEBUG(10,("wait_for_aio_completion: %d events, doing a wait " "of %d seconds.\n", aio_completion_count, seconds_left )); err = SMB_VFS_AIO_SUSPEND(fsp, aiocb_list, aio_completion_count, &ts); DEBUG(10,("wait_for_aio_completion: returned err = %d, " "errno = %s\n", err, strerror(errno) )); if (err == -1 && errno == EAGAIN) { DEBUG(0,("wait_for_aio_completion: aio_suspend timed " "out waiting for %d events after a wait of " "%d seconds\n", aio_completion_count, seconds_left)); /* Timeout. */ cancel_aio_by_fsp(fsp); SAFE_FREE(aiocb_list); return EIO; } /* One or more events might have completed - process them if * so. */ for( i = 0; i < aio_completion_count; i++) { aio_ex = (struct aio_extra *)aiocb_list[i]->aio_sigevent.sigev_value.sival_ptr; if (!handle_aio_completed(aio_ex, &err)) { continue; } TALLOC_FREE(aio_ex); } SAFE_FREE(aiocb_list); seconds_left = SMB_TIME_FOR_AIO_COMPLETE_WAIT - (time(NULL) - start_time); } /* We timed out - we don't know why. Return ret if already an error, * else EIO. */ DEBUG(10,("wait_for_aio_completion: aio_suspend timed out waiting " "for %d events\n", aio_completion_count)); return EIO; } /**************************************************************************** Cancel any outstanding aio requests. The client doesn't care about the reply. *****************************************************************************/ void cancel_aio_by_fsp(files_struct *fsp) { struct aio_extra *aio_ex; for( aio_ex = aio_list_head; aio_ex; aio_ex = aio_ex->next) { if (aio_ex->fsp == fsp) { /* Unlock now we're done. */ SMB_VFS_STRICT_UNLOCK(fsp->conn, fsp, &aio_ex->lock); /* Don't delete the aio_extra record as we may have completed and don't yet know it. Just do the aio_cancel call and return. */ SMB_VFS_AIO_CANCEL(fsp, &aio_ex->acb); aio_ex->fsp = NULL; /* fsp will be closed when we * return. */ } } } #else NTSTATUS schedule_aio_read_and_X(connection_struct *conn, struct smb_request *smbreq, files_struct *fsp, SMB_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, char *data, SMB_OFF_T startpos, size_t numtowrite) { return NT_STATUS_RETRY; } NTSTATUS schedule_smb2_aio_read(connection_struct *conn, struct smb_request *smbreq, files_struct *fsp, char *inbuf, SMB_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 cancel_aio_by_fsp(files_struct *fsp) { } int wait_for_aio_completion(files_struct *fsp) { return 0; } void smbd_aio_complete_mid(uint64_t mid); #endif