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35f9bc0672
Bug: https://bugzilla.samba.org/show_bug.cgi?id=13667 Signed-off-by: Ralph Boehme <slow@samba.org> Reviewed-by: Volker Lendecke <vl@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
321 lines
8.0 KiB
C
321 lines
8.0 KiB
C
/*
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* Unix SMB/CIFS implementation.
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* Samba VFS module for delay injection in VFS calls
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* Copyright (C) Ralph Boehme 2018
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "smbd/smbd.h"
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#include "lib/util/tevent_unix.h"
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#undef DBGC_CLASS
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#define DBGC_CLASS DBGC_VFS
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static void inject_delay(const char *vfs_func, vfs_handle_struct *handle)
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{
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int delay;
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delay = lp_parm_int(SNUM(handle->conn), "delay_inject", vfs_func, 0);
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if (delay == 0) {
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return;
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}
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DBG_DEBUG("Injected delay for [%s] of [%d] ms\n", vfs_func, delay);
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smb_msleep(delay);
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}
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static int vfs_delay_inject_ntimes(vfs_handle_struct *handle,
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const struct smb_filename *smb_fname,
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struct smb_file_time *ft)
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{
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inject_delay("ntimes", handle);
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return SMB_VFS_NEXT_NTIMES(handle, smb_fname, ft);
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}
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struct vfs_delay_inject_pread_state {
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struct tevent_context *ev;
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struct vfs_handle_struct *handle;
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struct files_struct *fsp;
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void *data;
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size_t n;
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off_t offset;
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ssize_t ret;
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struct vfs_aio_state vfs_aio_state;
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};
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static void vfs_delay_inject_pread_wait_done(struct tevent_req *subreq);
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static void vfs_delay_inject_pread_done(struct tevent_req *subreq);
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static struct tevent_req *vfs_delay_inject_pread_send(
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struct vfs_handle_struct *handle,
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TALLOC_CTX *mem_ctx,
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struct tevent_context *ev,
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struct files_struct *fsp,
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void *data,
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size_t n,
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off_t offset)
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{
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struct tevent_req *req = NULL, *subreq = NULL;
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struct vfs_delay_inject_pread_state *state = NULL;
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int delay;
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struct timeval delay_tv;
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delay = lp_parm_int(
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SNUM(handle->conn), "delay_inject", "pread_send", 0);
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delay_tv = tevent_timeval_current_ofs(delay / 1000,
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(delay * 1000) % 1000000);
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req = tevent_req_create(mem_ctx, &state,
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struct vfs_delay_inject_pread_state);
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if (req == NULL) {
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return NULL;
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}
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*state = (struct vfs_delay_inject_pread_state) {
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.ev = ev,
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.handle = handle,
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.fsp = fsp,
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.data = data,
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.n = n,
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.offset = offset,
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};
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if (delay == 0) {
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subreq = SMB_VFS_NEXT_PREAD_SEND(state,
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state->ev,
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state->handle,
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state->fsp,
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state->data,
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state->n,
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state->offset);
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if (tevent_req_nomem(subreq, req)) {
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return tevent_req_post(req, ev);
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}
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tevent_req_set_callback(subreq,
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vfs_delay_inject_pread_done,
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req);
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return req;
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}
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subreq = tevent_wakeup_send(state, ev, delay_tv);
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if (tevent_req_nomem(subreq, req)) {
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return tevent_req_post(req, ev);
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}
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tevent_req_set_callback(subreq, vfs_delay_inject_pread_wait_done, req);
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return req;
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}
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static void vfs_delay_inject_pread_wait_done(struct tevent_req *subreq)
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{
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struct tevent_req *req = tevent_req_callback_data(
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subreq, struct tevent_req);
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struct vfs_delay_inject_pread_state *state = tevent_req_data(
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req, struct vfs_delay_inject_pread_state);
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bool ok;
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ok = tevent_wakeup_recv(subreq);
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TALLOC_FREE(subreq);
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if (!ok) {
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tevent_req_error(req, EIO);
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return;
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}
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subreq = SMB_VFS_NEXT_PREAD_SEND(state,
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state->ev,
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state->handle,
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state->fsp,
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state->data,
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state->n,
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state->offset);
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if (tevent_req_nomem(subreq, req)) {
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return;
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}
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tevent_req_set_callback(subreq, vfs_delay_inject_pread_done, req);
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}
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static void vfs_delay_inject_pread_done(struct tevent_req *subreq)
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{
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struct tevent_req *req = tevent_req_callback_data(
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subreq, struct tevent_req);
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struct vfs_delay_inject_pread_state *state = tevent_req_data(
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req, struct vfs_delay_inject_pread_state);
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state->ret = SMB_VFS_PREAD_RECV(subreq, &state->vfs_aio_state);
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TALLOC_FREE(subreq);
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tevent_req_done(req);
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}
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static ssize_t vfs_delay_inject_pread_recv(struct tevent_req *req,
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struct vfs_aio_state *vfs_aio_state)
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{
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struct vfs_delay_inject_pread_state *state = tevent_req_data(
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req, struct vfs_delay_inject_pread_state);
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if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
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return -1;
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}
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*vfs_aio_state = state->vfs_aio_state;
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return state->ret;
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}
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struct vfs_delay_inject_pwrite_state {
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struct tevent_context *ev;
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struct vfs_handle_struct *handle;
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struct files_struct *fsp;
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const void *data;
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size_t n;
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off_t offset;
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ssize_t ret;
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struct vfs_aio_state vfs_aio_state;
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};
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static void vfs_delay_inject_pwrite_wait_done(struct tevent_req *subreq);
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static void vfs_delay_inject_pwrite_done(struct tevent_req *subreq);
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static struct tevent_req *vfs_delay_inject_pwrite_send(
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struct vfs_handle_struct *handle,
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TALLOC_CTX *mem_ctx,
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struct tevent_context *ev,
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struct files_struct *fsp,
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const void *data,
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size_t n,
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off_t offset)
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{
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struct tevent_req *req = NULL, *subreq = NULL;
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struct vfs_delay_inject_pwrite_state *state = NULL;
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int delay;
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struct timeval delay_tv;
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delay = lp_parm_int(
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SNUM(handle->conn), "delay_inject", "pwrite_send", 0);
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delay_tv = tevent_timeval_current_ofs(delay / 1000,
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(delay * 1000) % 1000000);
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req = tevent_req_create(mem_ctx, &state,
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struct vfs_delay_inject_pwrite_state);
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if (req == NULL) {
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return NULL;
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}
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*state = (struct vfs_delay_inject_pwrite_state) {
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.ev = ev,
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.handle = handle,
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.fsp = fsp,
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.data = data,
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.n = n,
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.offset = offset,
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};
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if (delay == 0) {
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subreq = SMB_VFS_NEXT_PWRITE_SEND(state,
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state->ev,
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state->handle,
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state->fsp,
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state->data,
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state->n,
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state->offset);
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if (tevent_req_nomem(subreq, req)) {
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return tevent_req_post(req, ev);
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}
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tevent_req_set_callback(subreq,
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vfs_delay_inject_pwrite_done,
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req);
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return req;
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}
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subreq = tevent_wakeup_send(state, ev, delay_tv);
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if (tevent_req_nomem(subreq, req)) {
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return tevent_req_post(req, ev);
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}
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tevent_req_set_callback(
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subreq, vfs_delay_inject_pwrite_wait_done, req);
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return req;
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}
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static void vfs_delay_inject_pwrite_wait_done(struct tevent_req *subreq)
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{
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struct tevent_req *req = tevent_req_callback_data(
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subreq, struct tevent_req);
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struct vfs_delay_inject_pwrite_state *state = tevent_req_data(
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req, struct vfs_delay_inject_pwrite_state);
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bool ok;
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ok = tevent_wakeup_recv(subreq);
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TALLOC_FREE(subreq);
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if (!ok) {
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tevent_req_error(req, EIO);
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return;
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}
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subreq = SMB_VFS_NEXT_PWRITE_SEND(state,
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state->ev,
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state->handle,
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state->fsp,
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state->data,
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state->n,
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state->offset);
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if (tevent_req_nomem(subreq, req)) {
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return;
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}
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tevent_req_set_callback(subreq, vfs_delay_inject_pwrite_done, req);
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}
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static void vfs_delay_inject_pwrite_done(struct tevent_req *subreq)
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{
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struct tevent_req *req = tevent_req_callback_data(
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subreq, struct tevent_req);
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struct vfs_delay_inject_pwrite_state *state = tevent_req_data(
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req, struct vfs_delay_inject_pwrite_state);
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state->ret = SMB_VFS_PWRITE_RECV(subreq, &state->vfs_aio_state);
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TALLOC_FREE(subreq);
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tevent_req_done(req);
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}
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static ssize_t vfs_delay_inject_pwrite_recv(struct tevent_req *req,
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struct vfs_aio_state *vfs_aio_state)
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{
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struct vfs_delay_inject_pwrite_state *state = tevent_req_data(
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req, struct vfs_delay_inject_pwrite_state);
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if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
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return -1;
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}
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*vfs_aio_state = state->vfs_aio_state;
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return state->ret;
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}
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static struct vfs_fn_pointers vfs_delay_inject_fns = {
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.ntimes_fn = vfs_delay_inject_ntimes,
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.pread_send_fn = vfs_delay_inject_pread_send,
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.pread_recv_fn = vfs_delay_inject_pread_recv,
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.pwrite_send_fn = vfs_delay_inject_pwrite_send,
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.pwrite_recv_fn = vfs_delay_inject_pwrite_recv,
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};
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static_decl_vfs;
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NTSTATUS vfs_delay_inject_init(TALLOC_CTX *ctx)
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{
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return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "delay_inject",
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&vfs_delay_inject_fns);
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}
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