As the new fcopy application using uio is introduced, remove
obsolete hv_fcopy_daemon.c
Signed-off-by: Saurabh Sengar <ssengar@xxxxxxxxxxxxxxxxxxx>
---
tools/hv/hv_fcopy_daemon.c | 266 -------------------------------------
1 file changed, 266 deletions(-)
delete mode 100644 tools/hv/hv_fcopy_daemon.c
diff --git a/tools/hv/hv_fcopy_daemon.c b/tools/hv/hv_fcopy_daemon.c
deleted file mode 100644
index 16d629b22c25..000000000000
--- a/tools/hv/hv_fcopy_daemon.c
+++ /dev/null
@@ -1,266 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * An implementation of host to guest copy functionality for Linux.
- *
- * Copyright (C) 2014, Microsoft, Inc.
- *
- * Author : K. Y. Srinivasan <kys@xxxxxxxxxxxxx>
- */
-
-
-#include <sys/types.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
-#include <errno.h>
-#include <linux/hyperv.h>
-#include <linux/limits.h>
-#include <syslog.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <getopt.h>
-
-static int target_fd;
-static char target_fname[PATH_MAX];
-static unsigned long long filesize;
-
-static int hv_start_fcopy(struct hv_start_fcopy *smsg)
-{
- int error = HV_E_FAIL;
- char *q, *p;
-
- filesize = 0;
- p = (char *)smsg->path_name;
- snprintf(target_fname, sizeof(target_fname), "%s/%s",
- (char *)smsg->path_name, (char *)smsg->file_name);
-
- syslog(LOG_INFO, "Target file name: %s", target_fname);
- /*
- * Check to see if the path is already in place; if not,
- * create if required.
- */
- while ((q = strchr(p, '/')) != NULL) {
- if (q == p) {
- p++;
- continue;
- }
- *q = '\0';
- if (access((char *)smsg->path_name, F_OK)) {
- if (smsg->copy_flags & CREATE_PATH) {
- if (mkdir((char *)smsg->path_name, 0755)) {
- syslog(LOG_ERR, "Failed to create %s",
- (char *)smsg->path_name);
- goto done;
- }
- } else {
- syslog(LOG_ERR, "Invalid path: %s",
- (char *)smsg->path_name);
- goto done;
- }
- }
- p = q + 1;
- *q = '/';
- }
-
- if (!access(target_fname, F_OK)) {
- syslog(LOG_INFO, "File: %s exists", target_fname);
- if (!(smsg->copy_flags & OVER_WRITE)) {
- error = HV_ERROR_ALREADY_EXISTS;
- goto done;
- }
- }
-
- target_fd = open(target_fname,
- O_RDWR | O_CREAT | O_TRUNC | O_CLOEXEC, 0744);
- if (target_fd == -1) {
- syslog(LOG_INFO, "Open Failed: %s", strerror(errno));
- goto done;
- }
-
- error = 0;
-done:
- if (error)
- target_fname[0] = '\0';
- return error;
-}
-
-static int hv_copy_data(struct hv_do_fcopy *cpmsg)
-{
- ssize_t bytes_written;
- int ret = 0;
-
- bytes_written = pwrite(target_fd, cpmsg->data, cpmsg->size,
- cpmsg->offset);
-
- filesize += cpmsg->size;
- if (bytes_written != cpmsg->size) {
- switch (errno) {
- case ENOSPC:
- ret = HV_ERROR_DISK_FULL;
- break;
- default:
- ret = HV_E_FAIL;
- break;
- }
- syslog(LOG_ERR, "pwrite failed to write %llu bytes: %ld (%s)",
- filesize, (long)bytes_written, strerror(errno));
- }
-
- return ret;
-}
-
-/*
- * Reset target_fname to "" in the two below functions for hibernation: if
- * the fcopy operation is aborted by hibernation, the daemon should remove the
- * partially-copied file; to achieve this, the hv_utils driver always fakes a
- * CANCEL_FCOPY message upon suspend, and later when the VM resumes back,
- * the daemon calls hv_copy_cancel() to remove the file; if a file is copied
- * successfully before suspend, hv_copy_finished() must reset target_fname to
- * avoid that the file can be incorrectly removed upon resume, since the faked
- * CANCEL_FCOPY message is spurious in this case.
- */
-static int hv_copy_finished(void)
-{
- close(target_fd);
- target_fname[0] = '\0';
- return 0;
-}
-static int hv_copy_cancel(void)
-{
- close(target_fd);
- if (strlen(target_fname) > 0) {
- unlink(target_fname);
- target_fname[0] = '\0';
- }
- return 0;
-
-}
-
-void print_usage(char *argv[])
-{
- fprintf(stderr, "Usage: %s [options]\n"
- "Options are:\n"
- " -n, --no-daemon stay in foreground, don't daemonize\n"
- " -h, --help print this help\n", argv[0]);
-}
-
-int main(int argc, char *argv[])
-{
- int fcopy_fd = -1;
- int error;
- int daemonize = 1, long_index = 0, opt;
- int version = FCOPY_CURRENT_VERSION;
- union {
- struct hv_fcopy_hdr hdr;
- struct hv_start_fcopy start;
- struct hv_do_fcopy copy;
- __u32 kernel_modver;
- } buffer = { };
- int in_handshake;
-
- static struct option long_options[] = {
- {"help", no_argument, 0, 'h' },
- {"no-daemon", no_argument, 0, 'n' },
- {0, 0, 0, 0 }
- };
-
- while ((opt = getopt_long(argc, argv, "hn", long_options,
- &long_index)) != -1) {
- switch (opt) {
- case 'n':
- daemonize = 0;
- break;
- case 'h':
- default:
- print_usage(argv);
- exit(EXIT_FAILURE);
- }
- }
-
- if (daemonize && daemon(1, 0)) {
- syslog(LOG_ERR, "daemon() failed; error: %s", strerror(errno));
- exit(EXIT_FAILURE);
- }
-
- openlog("HV_FCOPY", 0, LOG_USER);
- syslog(LOG_INFO, "starting; pid is:%d", getpid());
-
-reopen_fcopy_fd:
- if (fcopy_fd != -1)
- close(fcopy_fd);
- /* Remove any possible partially-copied file on error */
- hv_copy_cancel();
- in_handshake = 1;
- fcopy_fd = open("/dev/vmbus/hv_fcopy", O_RDWR);
-
- if (fcopy_fd < 0) {
- syslog(LOG_ERR, "open /dev/vmbus/hv_fcopy failed; error: %d %s",
- errno, strerror(errno));
- exit(EXIT_FAILURE);
- }
-
- /*
- * Register with the kernel.
- */
- if ((write(fcopy_fd, &version, sizeof(int))) != sizeof(int)) {
- syslog(LOG_ERR, "Registration failed: %s", strerror(errno));
- exit(EXIT_FAILURE);
- }
-
- while (1) {
- /*
- * In this loop we process fcopy messages after the
- * handshake is complete.
- */
- ssize_t len;
-
- len = pread(fcopy_fd, &buffer, sizeof(buffer), 0);
- if (len < 0) {
- syslog(LOG_ERR, "pread failed: %s", strerror(errno));
- goto reopen_fcopy_fd;
- }
-
- if (in_handshake) {
- if (len != sizeof(buffer.kernel_modver)) {
- syslog(LOG_ERR, "invalid version negotiation");
- exit(EXIT_FAILURE);
- }
- in_handshake = 0;
- syslog(LOG_INFO, "kernel module version: %u",
- buffer.kernel_modver);
- continue;
- }
-
- switch (buffer.hdr.operation) {
- case START_FILE_COPY:
- error = hv_start_fcopy(&buffer.start);
- break;
- case WRITE_TO_FILE:
- error = hv_copy_data(&buffer.copy);
- break;
- case COMPLETE_FCOPY:
- error = hv_copy_finished();
- break;
- case CANCEL_FCOPY:
- error = hv_copy_cancel();
- break;
-
- default:
- error = HV_E_FAIL;
- syslog(LOG_ERR, "Unknown operation: %d",
- buffer.hdr.operation);
-
- }
-
- /*
- * pwrite() may return an error due to the faked CANCEL_FCOPY
- * message upon hibernation. Ignore the error by resetting the
- * dev file, i.e. closing and re-opening it.
- */
- if (pwrite(fcopy_fd, &error, sizeof(int), 0) != sizeof(int)) {
- syslog(LOG_ERR, "pwrite failed: %s", strerror(errno));
- goto reopen_fcopy_fd;
- }
- }
-}
--
2.34.1
