From ec314f61e4fc2d3dd6ea78aa18a5ac276eb1a8e3 Mon Sep 17 00:00:00 2001 From: Saurabh Sengar Date: Sat, 30 Mar 2024 01:52:02 -0700 Subject: Drivers: hv: Remove fcopy driver As the new fcopy driver using uio is introduced, remove obsolete driver and application. Signed-off-by: Saurabh Sengar Reviewed-by: Long Li Link: https://lore.kernel.org/r/1711788723-8593-7-git-send-email-ssengar@linux.microsoft.com Signed-off-by: Greg Kroah-Hartman --- tools/hv/hv_fcopy_daemon.c | 266 --------------------------------------------- 1 file changed, 266 deletions(-) delete mode 100644 tools/hv/hv_fcopy_daemon.c (limited to 'tools/hv') 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 - */ - - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -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; - } - } -} -- cgit v1.2.3