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-rw-r--r--source3/smbd/smb1_aio.c409
1 files changed, 409 insertions, 0 deletions
diff --git a/source3/smbd/smb1_aio.c b/source3/smbd/smb1_aio.c
new file mode 100644
index 0000000..d54a372
--- /dev/null
+++ b/source3/smbd/smb1_aio.c
@@ -0,0 +1,409 @@
+/*
+ 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"
+#include "../lib/util/tevent_unix.h"
+
+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;
+ bool ok;
+
+ ok = vfs_valid_pread_range(startpos, smb_maxcnt);
+ if (!ok) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ if (fsp_is_alternate_stream(fsp)) {
+ 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 */
+ if (req_is_in_chain(smbreq)) {
+ 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 + 1 /* padding byte */;
+
+ 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_smb1_reply_common_req(smbreq, (char *)aio_ex->outbuf.data);
+ srv_smb1_set_message((char *)aio_ex->outbuf.data, 12, 0, True);
+ SCVAL(aio_ex->outbuf.data,smb_vwv0,0xFF); /* Never a chained reply. */
+ SCVAL(smb_buf(aio_ex->outbuf.data), 0, 0); /* padding byte */
+
+ init_strict_lock_struct(fsp,
+ (uint64_t)smbreq->smbpid,
+ (uint64_t)startpos,
+ (uint64_t)smb_maxcnt,
+ READ_LOCK,
+ lp_posix_cifsu_locktype(fsp),
+ &aio_ex->lock);
+
+ /* Take the lock until the AIO completes. */
+ if (!SMB_VFS_STRICT_LOCK_CHECK(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) + 1 /* pad */,
+ smb_maxcnt, startpos);
+ if (req == NULL) {
+ DEBUG(0,("schedule_aio_read_and_X: aio_read failed. "
+ "Error %s\n", strerror(errno) ));
+ 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"));
+ 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;
+ size_t outsize;
+ char *outbuf = (char *)aio_ex->outbuf.data;
+ ssize_t nread;
+ struct vfs_aio_state vfs_aio_state;
+
+ nread = SMB_VFS_PREAD_RECV(req, &vfs_aio_state);
+ TALLOC_FREE(req);
+
+ DEBUG(10, ("pread_recv returned %d, err = %s\n", (int)nread,
+ (nread == -1) ? strerror(vfs_aio_state.error) : "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;
+ }
+
+ if (nread < 0) {
+ DEBUG( 3, ("handle_aio_read_complete: file %s nread == %d. "
+ "Error = %s\n", fsp_str_dbg(fsp), (int)nread,
+ strerror(vfs_aio_state.error)));
+
+ ERROR_NT(map_nt_error_from_unix(vfs_aio_state.error));
+ outsize = srv_smb1_set_message(outbuf,0,0,true);
+ } else {
+ outsize = setup_readX_header(outbuf, nread);
+
+ fh_set_pos(aio_ex->fsp->fh, aio_ex->offset + nread);
+ fh_set_position_information(aio_ex->fsp->fh,
+ fh_get_pos(aio_ex->fsp->fh));
+
+ DEBUG( 3, ("handle_aio_read_complete file %s max=%d "
+ "nread=%d\n", fsp_str_dbg(fsp),
+ (int)aio_ex->nbyte, (int)nread ) );
+
+ }
+
+ if (outsize <= 4) {
+ DBG_INFO("Invalid outsize (%zu)\n", outsize);
+ TALLOC_FREE(aio_ex);
+ return;
+ }
+ outsize -= 4;
+ _smb_setlen_large(outbuf, outsize);
+
+ show_msg(outbuf);
+ if (!smb1_srv_send(aio_ex->smbreq->xconn,
+ outbuf,
+ true,
+ aio_ex->smbreq->seqnum + 1,
+ IS_CONN_ENCRYPTED(fsp->conn))) {
+ exit_server_cleanly("handle_aio_read_complete: smb1_srv_send "
+ "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_is_alternate_stream(fsp)) {
+ 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 */
+ if (req_is_in_chain(smbreq)) {
+ 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_smb1_reply_common_req(smbreq, (char *)aio_ex->outbuf.data);
+ srv_smb1_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,
+ lp_posix_cifsu_locktype(fsp),
+ &aio_ex->lock);
+
+ /* Take the lock until the AIO completes. */
+ if (!SMB_VFS_STRICT_LOCK_CHECK(conn, fsp, &aio_ex->lock)) {
+ TALLOC_FREE(aio_ex);
+ return NT_STATUS_FILE_LOCK_CONFLICT;
+ }
+
+ aio_ex->nbyte = numtowrite;
+ aio_ex->offset = startpos;
+
+ req = pwrite_fsync_send(aio_ex, fsp->conn->sconn->ev_ctx, fsp,
+ data, numtowrite, startpos,
+ aio_ex->write_through);
+ if (req == NULL) {
+ DEBUG(3,("schedule_aio_wrote_and_X: aio_write failed. "
+ "Error %s\n", strerror(errno) ));
+ 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"));
+ 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_sync_always(SNUM(fsp->conn))
+ && fsp->fsp_flags.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 (!smb1_srv_send(aio_ex->smbreq->xconn,
+ (char *)aio_ex->outbuf.data,
+ true,
+ aio_ex->smbreq->seqnum + 1,
+ IS_CONN_ENCRYPTED(fsp->conn))) {
+ exit_server_cleanly("schedule_aio_write_and_X: "
+ "smb1_srv_send 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)\n",
+ fsp_str_dbg(fsp), (double)startpos, (unsigned int)numtowrite,
+ (unsigned int)aio_ex->smbreq->mid));
+
+ 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 = pwrite_fsync_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;
+ }
+
+ mark_file_modified(fsp);
+
+ if (fsp->fsp_flags.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_smb1_set_message(outbuf,0,0,true);
+ } else {
+ 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));
+
+ fh_set_pos(aio_ex->fsp->fh, aio_ex->offset + nwritten);
+ }
+
+ show_msg(outbuf);
+ if (!smb1_srv_send(aio_ex->smbreq->xconn,
+ outbuf,
+ true,
+ aio_ex->smbreq->seqnum + 1,
+ IS_CONN_ENCRYPTED(fsp->conn))) {
+ exit_server_cleanly("handle_aio_write_complete: "
+ "smb1_srv_send 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);
+}
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