diff options
Diffstat (limited to 'tools/hv')
| -rw-r--r-- | tools/hv/Makefile | 13 | ||||
| -rw-r--r-- | tools/hv/hv_fcopy_daemon.c | 197 | ||||
| -rwxr-xr-x | tools/hv/hv_get_dhcp_info.sh | 28 | ||||
| -rwxr-xr-x | tools/hv/hv_get_dns_info.sh | 13 | ||||
| -rw-r--r-- | tools/hv/hv_kvp_daemon.c | 1542 | ||||
| -rwxr-xr-x | tools/hv/hv_set_ifconfig.sh | 64 | ||||
| -rw-r--r-- | tools/hv/hv_vss_daemon.c | 267 |
7 files changed, 1974 insertions, 150 deletions
diff --git a/tools/hv/Makefile b/tools/hv/Makefile new file mode 100644 index 00000000000..bd22f786a60 --- /dev/null +++ b/tools/hv/Makefile @@ -0,0 +1,13 @@ +# Makefile for Hyper-V tools + +CC = $(CROSS_COMPILE)gcc +PTHREAD_LIBS = -lpthread +WARNINGS = -Wall -Wextra +CFLAGS = $(WARNINGS) -g $(PTHREAD_LIBS) + +all: hv_kvp_daemon hv_vss_daemon +%: %.c + $(CC) $(CFLAGS) -o $@ $^ + +clean: + $(RM) hv_kvp_daemon hv_vss_daemon diff --git a/tools/hv/hv_fcopy_daemon.c b/tools/hv/hv_fcopy_daemon.c new file mode 100644 index 00000000000..fba1c75aa48 --- /dev/null +++ b/tools/hv/hv_fcopy_daemon.c @@ -0,0 +1,197 @@ +/* + * An implementation of host to guest copy functionality for Linux. + * + * Copyright (C) 2014, Microsoft, Inc. + * + * Author : K. Y. Srinivasan <kys@microsoft.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + * 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, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for more + * details. + */ + + +#include <sys/types.h> +#include <sys/socket.h> +#include <sys/poll.h> +#include <linux/types.h> +#include <linux/kdev_t.h> +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <string.h> +#include <ctype.h> +#include <errno.h> +#include <linux/hyperv.h> +#include <syslog.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <dirent.h> + +static int target_fd; +static char target_fname[W_MAX_PATH]; + +static int hv_start_fcopy(struct hv_start_fcopy *smsg) +{ + int error = HV_E_FAIL; + char *q, *p; + + /* + * If possile append a path seperator to the path. + */ + if (strlen((char *)smsg->path_name) < (W_MAX_PATH - 2)) + strcat((char *)smsg->path_name, "/"); + + p = (char *)smsg->path_name; + snprintf(target_fname, sizeof(target_fname), "%s/%s", + (char *)smsg->path_name, 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_CLOEXEC, 0744); + if (target_fd == -1) { + syslog(LOG_INFO, "Open Failed: %s", strerror(errno)); + goto done; + } + + error = 0; +done: + return error; +} + +static int hv_copy_data(struct hv_do_fcopy *cpmsg) +{ + ssize_t bytes_written; + + bytes_written = pwrite(target_fd, cpmsg->data, cpmsg->size, + cpmsg->offset); + + if (bytes_written != cpmsg->size) + return HV_E_FAIL; + + return 0; +} + +static int hv_copy_finished(void) +{ + close(target_fd); + return 0; +} +static int hv_copy_cancel(void) +{ + close(target_fd); + unlink(target_fname); + return 0; + +} + +int main(void) +{ + int fd, fcopy_fd, len; + int error; + int version = FCOPY_CURRENT_VERSION; + char *buffer[4096 * 2]; + struct hv_fcopy_hdr *in_msg; + + if (daemon(1, 0)) { + syslog(LOG_ERR, "daemon() failed; error: %s", strerror(errno)); + exit(EXIT_FAILURE); + } + + openlog("HV_FCOPY", 0, LOG_USER); + syslog(LOG_INFO, "HV_FCOPY starting; pid is:%d", getpid()); + + 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. + */ + len = pread(fcopy_fd, buffer, (4096 * 2), 0); + if (len < 0) { + syslog(LOG_ERR, "pread failed: %s", strerror(errno)); + exit(EXIT_FAILURE); + } + in_msg = (struct hv_fcopy_hdr *)buffer; + + switch (in_msg->operation) { + case START_FILE_COPY: + error = hv_start_fcopy((struct hv_start_fcopy *)in_msg); + break; + case WRITE_TO_FILE: + error = hv_copy_data((struct hv_do_fcopy *)in_msg); + break; + case COMPLETE_FCOPY: + error = hv_copy_finished(); + break; + case CANCEL_FCOPY: + error = hv_copy_cancel(); + break; + + default: + syslog(LOG_ERR, "Unknown operation: %d", + in_msg->operation); + + } + + if (pwrite(fcopy_fd, &error, sizeof(int), 0) != sizeof(int)) { + syslog(LOG_ERR, "pwrite failed: %s", strerror(errno)); + exit(EXIT_FAILURE); + } + } +} diff --git a/tools/hv/hv_get_dhcp_info.sh b/tools/hv/hv_get_dhcp_info.sh new file mode 100755 index 00000000000..ccd3e953276 --- /dev/null +++ b/tools/hv/hv_get_dhcp_info.sh @@ -0,0 +1,28 @@ +#!/bin/bash + +# This example script retrieves the DHCP state of a given interface. +# In the interest of keeping the KVP daemon code free of distro specific +# information; the kvp daemon code invokes this external script to gather +# DHCP setting for the specific interface. +# +# Input: Name of the interface +# +# Output: The script prints the string "Enabled" to stdout to indicate +# that DHCP is enabled on the interface. If DHCP is not enabled, +# the script prints the string "Disabled" to stdout. +# +# Each Distro is expected to implement this script in a distro specific +# fashion. For instance on Distros that ship with Network Manager enabled, +# this script can be based on the Network Manager APIs for retrieving DHCP +# information. + +if_file="/etc/sysconfig/network-scripts/ifcfg-"$1 + +dhcp=$(grep "dhcp" $if_file 2>/dev/null) + +if [ "$dhcp" != "" ]; +then +echo "Enabled" +else +echo "Disabled" +fi diff --git a/tools/hv/hv_get_dns_info.sh b/tools/hv/hv_get_dns_info.sh new file mode 100755 index 00000000000..058c17b46ff --- /dev/null +++ b/tools/hv/hv_get_dns_info.sh @@ -0,0 +1,13 @@ +#!/bin/bash + +# This example script parses /etc/resolv.conf to retrive DNS information. +# In the interest of keeping the KVP daemon code free of distro specific +# information; the kvp daemon code invokes this external script to gather +# DNS information. +# This script is expected to print the nameserver values to stdout. +# Each Distro is expected to implement this script in a distro specific +# fashion. For instance on Distros that ship with Network Manager enabled, +# this script can be based on the Network Manager APIs for retrieving DNS +# entries. + +cat /etc/resolv.conf 2>/dev/null | awk '/^nameserver/ { print $2 }' diff --git a/tools/hv/hv_kvp_daemon.c b/tools/hv/hv_kvp_daemon.c index 11224eddcdc..4088b816a3e 100644 --- a/tools/hv/hv_kvp_daemon.c +++ b/tools/hv/hv_kvp_daemon.c @@ -26,29 +26,23 @@ #include <sys/socket.h> #include <sys/poll.h> #include <sys/utsname.h> -#include <linux/types.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <string.h> +#include <ctype.h> #include <errno.h> #include <arpa/inet.h> #include <linux/connector.h> +#include <linux/hyperv.h> #include <linux/netlink.h> #include <ifaddrs.h> #include <netdb.h> #include <syslog.h> - -/* - * KYS: TODO. Need to register these in the kernel. - * - * The following definitions are shared with the in-kernel component; do not - * change any of this without making the corresponding changes in - * the KVP kernel component. - */ -#define CN_KVP_IDX 0x9 /* MSFT KVP functionality */ -#define CN_KVP_VAL 0x1 /* This supports queries from the kernel */ -#define CN_KVP_USER_VAL 0x2 /* This supports queries from the user */ +#include <sys/stat.h> +#include <fcntl.h> +#include <dirent.h> +#include <net/if.h> /* * KVP protocol: The user mode component first registers with the @@ -60,25 +54,8 @@ * We use this infrastructure for also supporting queries from user mode * application for state that may be maintained in the KVP kernel component. * - * XXXKYS: Have a shared header file between the user and kernel (TODO) */ -enum kvp_op { - KVP_REGISTER = 0, /* Register the user mode component*/ - KVP_KERNEL_GET, /*Kernel is requesting the value for the specified key*/ - KVP_KERNEL_SET, /*Kernel is providing the value for the specified key*/ - KVP_USER_GET, /*User is requesting the value for the specified key*/ - KVP_USER_SET /*User is providing the value for the specified key*/ -}; - -#define HV_KVP_EXCHANGE_MAX_KEY_SIZE 512 -#define HV_KVP_EXCHANGE_MAX_VALUE_SIZE 2048 - -struct hv_ku_msg { - __u32 kvp_index; - __u8 kvp_key[HV_KVP_EXCHANGE_MAX_KEY_SIZE]; /* Key name */ - __u8 kvp_value[HV_KVP_EXCHANGE_MAX_VALUE_SIZE]; /* Key value */ -}; enum key_index { FullyQualifiedDomainName = 0, @@ -93,29 +70,405 @@ enum key_index { ProcessorArchitecture }; -/* - * End of shared definitions. - */ -static char kvp_send_buffer[4096]; -static char kvp_recv_buffer[4096]; +enum { + IPADDR = 0, + NETMASK, + GATEWAY, + DNS +}; + static struct sockaddr_nl addr; +static int in_hand_shake = 1; static char *os_name = ""; static char *os_major = ""; static char *os_minor = ""; static char *processor_arch; static char *os_build; -static char *lic_version; +static char *os_version; +static char *lic_version = "Unknown version"; +static char full_domain_name[HV_KVP_EXCHANGE_MAX_VALUE_SIZE]; static struct utsname uts_buf; +/* + * The location of the interface configuration file. + */ + +#define KVP_CONFIG_LOC "/var/lib/hyperv" + +#define MAX_FILE_NAME 100 +#define ENTRIES_PER_BLOCK 50 + +#ifndef SOL_NETLINK +#define SOL_NETLINK 270 +#endif + +struct kvp_record { + char key[HV_KVP_EXCHANGE_MAX_KEY_SIZE]; + char value[HV_KVP_EXCHANGE_MAX_VALUE_SIZE]; +}; + +struct kvp_file_state { + int fd; + int num_blocks; + struct kvp_record *records; + int num_records; + char fname[MAX_FILE_NAME]; +}; + +static struct kvp_file_state kvp_file_info[KVP_POOL_COUNT]; + +static void kvp_acquire_lock(int pool) +{ + struct flock fl = {F_WRLCK, SEEK_SET, 0, 0, 0}; + fl.l_pid = getpid(); + + if (fcntl(kvp_file_info[pool].fd, F_SETLKW, &fl) == -1) { + syslog(LOG_ERR, "Failed to acquire the lock pool: %d; error: %d %s", pool, + errno, strerror(errno)); + exit(EXIT_FAILURE); + } +} + +static void kvp_release_lock(int pool) +{ + struct flock fl = {F_UNLCK, SEEK_SET, 0, 0, 0}; + fl.l_pid = getpid(); + + if (fcntl(kvp_file_info[pool].fd, F_SETLK, &fl) == -1) { + syslog(LOG_ERR, "Failed to release the lock pool: %d; error: %d %s", pool, + errno, strerror(errno)); + exit(EXIT_FAILURE); + } +} + +static void kvp_update_file(int pool) +{ + FILE *filep; + size_t bytes_written; + + /* + * We are going to write our in-memory registry out to + * disk; acquire the lock first. + */ + kvp_acquire_lock(pool); + + filep = fopen(kvp_file_info[pool].fname, "we"); + if (!filep) { + syslog(LOG_ERR, "Failed to open file, pool: %d; error: %d %s", pool, + errno, strerror(errno)); + kvp_release_lock(pool); + exit(EXIT_FAILURE); + } + + bytes_written = fwrite(kvp_file_info[pool].records, + sizeof(struct kvp_record), + kvp_file_info[pool].num_records, filep); + + if (ferror(filep) || fclose(filep)) { + kvp_release_lock(pool); + syslog(LOG_ERR, "Failed to write file, pool: %d", pool); + exit(EXIT_FAILURE); + } + + kvp_release_lock(pool); +} + +static void kvp_update_mem_state(int pool) +{ + FILE *filep; + size_t records_read = 0; + struct kvp_record *record = kvp_file_info[pool].records; + struct kvp_record *readp; + int num_blocks = kvp_file_info[pool].num_blocks; + int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK; + + kvp_acquire_lock(pool); + + filep = fopen(kvp_file_info[pool].fname, "re"); + if (!filep) { + syslog(LOG_ERR, "Failed to open file, pool: %d; error: %d %s", pool, + errno, strerror(errno)); + kvp_release_lock(pool); + exit(EXIT_FAILURE); + } + for (;;) { + readp = &record[records_read]; + records_read += fread(readp, sizeof(struct kvp_record), + ENTRIES_PER_BLOCK * num_blocks, + filep); + + if (ferror(filep)) { + syslog(LOG_ERR, "Failed to read file, pool: %d", pool); + exit(EXIT_FAILURE); + } + + if (!feof(filep)) { + /* + * We have more data to read. + */ + num_blocks++; + record = realloc(record, alloc_unit * num_blocks); + + if (record == NULL) { + syslog(LOG_ERR, "malloc failed"); + exit(EXIT_FAILURE); + } + continue; + } + break; + } + + kvp_file_info[pool].num_blocks = num_blocks; + kvp_file_info[pool].records = record; + kvp_file_info[pool].num_records = records_read; + + fclose(filep); + kvp_release_lock(pool); +} +static int kvp_file_init(void) +{ + int fd; + FILE *filep; + size_t records_read; + char *fname; + struct kvp_record *record; + struct kvp_record *readp; + int num_blocks; + int i; + int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK; + + if (access(KVP_CONFIG_LOC, F_OK)) { + if (mkdir(KVP_CONFIG_LOC, 0755 /* rwxr-xr-x */)) { + syslog(LOG_ERR, "Failed to create '%s'; error: %d %s", KVP_CONFIG_LOC, + errno, strerror(errno)); + exit(EXIT_FAILURE); + } + } + + for (i = 0; i < KVP_POOL_COUNT; i++) { + fname = kvp_file_info[i].fname; + records_read = 0; + num_blocks = 1; + sprintf(fname, "%s/.kvp_pool_%d", KVP_CONFIG_LOC, i); + fd = open(fname, O_RDWR | O_CREAT | O_CLOEXEC, 0644 /* rw-r--r-- */); + + if (fd == -1) + return 1; + + + filep = fopen(fname, "re"); + if (!filep) { + close(fd); + return 1; + } + + record = malloc(alloc_unit * num_blocks); + if (record == NULL) { + fclose(filep); + close(fd); + return 1; + } + for (;;) { + readp = &record[records_read]; + records_read += fread(readp, sizeof(struct kvp_record), + ENTRIES_PER_BLOCK, + filep); + + if (ferror(filep)) { + syslog(LOG_ERR, "Failed to read file, pool: %d", + i); + exit(EXIT_FAILURE); + } + + if (!feof(filep)) { + /* + * We have more data to read. + */ + num_blocks++; + record = realloc(record, alloc_unit * + num_blocks); + if (record == NULL) { + fclose(filep); + close(fd); + return 1; + } + continue; + } + break; + } + kvp_file_info[i].fd = fd; + kvp_file_info[i].num_blocks = num_blocks; + kvp_file_info[i].records = record; + kvp_file_info[i].num_records = records_read; + fclose(filep); + + } + + return 0; +} + +static int kvp_key_delete(int pool, const char *key, int key_size) +{ + int i; + int j, k; + int num_records; + struct kvp_record *record; + + /* + * First update the in-memory state. + */ + kvp_update_mem_state(pool); + + num_records = kvp_file_info[pool].num_records; + record = kvp_file_info[pool].records; + + for (i = 0; i < num_records; i++) { + if (memcmp(key, record[i].key, key_size)) + continue; + /* + * Found a match; just move the remaining + * entries up. + */ + if (i == num_records) { + kvp_file_info[pool].num_records--; + kvp_update_file(pool); + return 0; + } + + j = i; + k = j + 1; + for (; k < num_records; k++) { + strcpy(record[j].key, record[k].key); + strcpy(record[j].value, record[k].value); + j++; + } + + kvp_file_info[pool].num_records--; + kvp_update_file(pool); + return 0; + } + return 1; +} + +static int kvp_key_add_or_modify(int pool, const char *key, int key_size, const char *value, + int value_size) +{ + int i; + int num_records; + struct kvp_record *record; + int num_blocks; + + if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) || + (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE)) + return 1; + + /* + * First update the in-memory state. + */ + kvp_update_mem_state(pool); + + num_records = kvp_file_info[pool].num_records; + record = kvp_file_info[pool].records; + num_blocks = kvp_file_info[pool].num_blocks; + + for (i = 0; i < num_records; i++) { + if (memcmp(key, record[i].key, key_size)) + continue; + /* + * Found a match; just update the value - + * this is the modify case. + */ + memcpy(record[i].value, value, value_size); + kvp_update_file(pool); + return 0; + } + + /* + * Need to add a new entry; + */ + if (num_records == (ENTRIES_PER_BLOCK * num_blocks)) { + /* Need to allocate a larger array for reg entries. */ + record = realloc(record, sizeof(struct kvp_record) * + ENTRIES_PER_BLOCK * (num_blocks + 1)); + + if (record == NULL) + return 1; + kvp_file_info[pool].num_blocks++; + + } + memcpy(record[i].value, value, value_size); + memcpy(record[i].key, key, key_size); + kvp_file_info[pool].records = record; + kvp_file_info[pool].num_records++; + kvp_update_file(pool); + return 0; +} + +static int kvp_get_value(int pool, const char *key, int key_size, char *value, + int value_size) +{ + int i; + int num_records; + struct kvp_record *record; + + if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) || + (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE)) + return 1; + + /* + * First update the in-memory state. + */ + kvp_update_mem_state(pool); + + num_records = kvp_file_info[pool].num_records; + record = kvp_file_info[pool].records; + + for (i = 0; i < num_records; i++) { + if (memcmp(key, record[i].key, key_size)) + continue; + /* + * Found a match; just copy the value out. + */ + memcpy(value, record[i].value, value_size); + return 0; + } + + return 1; +} + +static int kvp_pool_enumerate(int pool, int index, char *key, int key_size, + char *value, int value_size) +{ + struct kvp_record *record; + + /* + * First update our in-memory database. + */ + kvp_update_mem_state(pool); + record = kvp_file_info[pool].records; + + if (index >= kvp_file_info[pool].num_records) { + return 1; + } + + memcpy(key, record[index].key, key_size); + memcpy(value, record[index].value, value_size); + return 0; +} + + void kvp_get_os_info(void) { FILE *file; char *p, buf[512]; uname(&uts_buf); - os_build = uts_buf.release; + os_version = uts_buf.release; + os_build = strdup(uts_buf.release); + + os_name = uts_buf.sysname; processor_arch = uts_buf.machine; /* @@ -123,24 +476,74 @@ void kvp_get_os_info(void) * string to be of the form: x.y.z * Strip additional information we may have. */ - p = strchr(os_build, '-'); + p = strchr(os_version, '-'); if (p) *p = '\0'; + /* + * Parse the /etc/os-release file if present: + * http://www.freedesktop.org/software/systemd/man/os-release.html + */ + file = fopen("/etc/os-release", "r"); + if (file != NULL) { + while (fgets(buf, sizeof(buf), file)) { + char *value, *q; + + /* Ignore comments */ + if (buf[0] == '#') + continue; + + /* Split into name=value */ + p = strchr(buf, '='); + if (!p) + continue; + *p++ = 0; + + /* Remove quotes and newline; un-escape */ + value = p; + q = p; + while (*p) { + if (*p == '\\') { + ++p; + if (!*p) + break; + *q++ = *p++; + } else if (*p == '\'' || *p == '"' || + *p == '\n') { + ++p; + } else { + *q++ = *p++; + } + } + *q = 0; + + if (!strcmp(buf, "NAME")) { + p = strdup(value); + if (!p) + break; + os_name = p; + } else if (!strcmp(buf, "VERSION_ID")) { + p = strdup(value); + if (!p) + break; + os_major = p; + } + } + fclose(file); + return; + } + + /* Fallback for older RH/SUSE releases */ file = fopen("/etc/SuSE-release", "r"); if (file != NULL) goto kvp_osinfo_found; file = fopen("/etc/redhat-release", "r"); if (file != NULL) goto kvp_osinfo_found; - /* - * Add code for other supported platforms. - */ /* * We don't have information about the os. */ - os_name = uts_buf.sysname; return; kvp_osinfo_found: @@ -184,82 +587,465 @@ done: return; } + + +/* + * Retrieve an interface name corresponding to the specified guid. + * If there is a match, the function returns a pointer + * to the interface name and if not, a NULL is returned. + * If a match is found, the caller is responsible for + * freeing the memory. + */ + +static char *kvp_get_if_name(char *guid) +{ + DIR *dir; + struct dirent *entry; + FILE *file; + char *p, *q, *x; + char *if_name = NULL; + char buf[256]; + char *kvp_net_dir = "/sys/class/net/"; + char dev_id[256]; + + dir = opendir(kvp_net_dir); + if (dir == NULL) + return NULL; + + snprintf(dev_id, sizeof(dev_id), "%s", kvp_net_dir); + q = dev_id + strlen(kvp_net_dir); + + while ((entry = readdir(dir)) != NULL) { + /* + * Set the state for the next pass. + */ + *q = '\0'; + strcat(dev_id, entry->d_name); + strcat(dev_id, "/device/device_id"); + + file = fopen(dev_id, "r"); + if (file == NULL) + continue; + + p = fgets(buf, sizeof(buf), file); + if (p) { + x = strchr(p, '\n'); + if (x) + *x = '\0'; + + if (!strcmp(p, guid)) { + /* + * Found the guid match; return the interface + * name. The caller will free the memory. + */ + if_name = strdup(entry->d_name); + fclose(file); + break; + } + } + fclose(file); + } + + closedir(dir); + return if_name; +} + +/* + * Retrieve the MAC address given the interface name. + */ + +static char *kvp_if_name_to_mac(char *if_name) +{ + FILE *file; + char *p, *x; + char buf[256]; + char addr_file[256]; + int i; + char *mac_addr = NULL; + + snprintf(addr_file, sizeof(addr_file), "%s%s%s", "/sys/class/net/", + if_name, "/address"); + + file = fopen(addr_file, "r"); + if (file == NULL) + return NULL; + + p = fgets(buf, sizeof(buf), file); + if (p) { + x = strchr(p, '\n'); + if (x) + *x = '\0'; + for (i = 0; i < strlen(p); i++) + p[i] = toupper(p[i]); + mac_addr = strdup(p); + } + + fclose(file); + return mac_addr; +} + + +/* + * Retrieve the interface name given tha MAC address. + */ + +static char *kvp_mac_to_if_name(char *mac) +{ + DIR *dir; + struct dirent *entry; + FILE *file; + char *p, *q, *x; + char *if_name = NULL; + char buf[256]; + char *kvp_net_dir = "/sys/class/net/"; + char dev_id[256]; + int i; + + dir = opendir(kvp_net_dir); + if (dir == NULL) + return NULL; + + snprintf(dev_id, sizeof(dev_id), kvp_net_dir); + q = dev_id + strlen(kvp_net_dir); + + while ((entry = readdir(dir)) != NULL) { + /* + * Set the state for the next pass. + */ + *q = '\0'; + + strcat(dev_id, entry->d_name); + strcat(dev_id, "/address"); + + file = fopen(dev_id, "r"); + if (file == NULL) + continue; + + p = fgets(buf, sizeof(buf), file); + if (p) { + x = strchr(p, '\n'); + if (x) + *x = '\0'; + + for (i = 0; i < strlen(p); i++) + p[i] = toupper(p[i]); + + if (!strcmp(p, mac)) { + /* + * Found the MAC match; return the interface + * name. The caller will free the memory. + */ + if_name = strdup(entry->d_name); + fclose(file); + break; + } + } + fclose(file); + } + + closedir(dir); + return if_name; +} + + +static void kvp_process_ipconfig_file(char *cmd, + char *config_buf, int len, + int element_size, int offset) +{ + char buf[256]; + char *p; + char *x; + FILE *file; + + /* + * First execute the command. + */ + file = popen(cmd, "r"); + if (file == NULL) + return; + + if (offset == 0) + memset(config_buf, 0, len); + while ((p = fgets(buf, sizeof(buf), file)) != NULL) { + if ((len - strlen(config_buf)) < (element_size + 1)) + break; + + x = strchr(p, '\n'); + if (x) + *x = '\0'; + + strcat(config_buf, p); + strcat(config_buf, ";"); + } + pclose(file); +} + +static void kvp_get_ipconfig_info(char *if_name, + struct hv_kvp_ipaddr_value *buffer) +{ + char cmd[512]; + char dhcp_info[128]; + char *p; + FILE *file; + + /* + * Get the address of default gateway (ipv4). + */ + sprintf(cmd, "%s %s", "ip route show dev", if_name); + strcat(cmd, " | awk '/default/ {print $3 }'"); + + /* + * Execute the command to gather gateway info. + */ + kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way, + (MAX_GATEWAY_SIZE * 2), INET_ADDRSTRLEN, 0); + + /* + * Get the address of default gateway (ipv6). + */ + sprintf(cmd, "%s %s", "ip -f inet6 route show dev", if_name); + strcat(cmd, " | awk '/default/ {print $3 }'"); + + /* + * Execute the command to gather gateway info (ipv6). + */ + kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way, + (MAX_GATEWAY_SIZE * 2), INET6_ADDRSTRLEN, 1); + + + /* + * Gather the DNS state. + * Since there is no standard way to get this information + * across various distributions of interest; we just invoke + * an external script that needs to be ported across distros + * of interest. + * + * Following is the expected format of the information from the script: + * + * ipaddr1 (nameserver1) + * ipaddr2 (nameserver2) + * . + * . + */ + + sprintf(cmd, "%s", "hv_get_dns_info"); + + /* + * Execute the command to gather DNS info. + */ + kvp_process_ipconfig_file(cmd, (char *)buffer->dns_addr, + (MAX_IP_ADDR_SIZE * 2), INET_ADDRSTRLEN, 0); + + /* + * Gather the DHCP state. + * We will gather this state by invoking an external script. + * The parameter to the script is the interface name. + * Here is the expected output: + * + * Enabled: DHCP enabled. + */ + + sprintf(cmd, "%s %s", "hv_get_dhcp_info", if_name); + + file = popen(cmd, "r"); + if (file == NULL) + return; + + p = fgets(dhcp_info, sizeof(dhcp_info), file); + if (p == NULL) { + pclose(file); + return; + } + + if (!strncmp(p, "Enabled", 7)) + buffer->dhcp_enabled = 1; + else + buffer->dhcp_enabled = 0; + + pclose(file); +} + + +static unsigned int hweight32(unsigned int *w) +{ + unsigned int res = *w - ((*w >> 1) & 0x55555555); + res = (res & 0x33333333) + ((res >> 2) & 0x33333333); + res = (res + (res >> 4)) & 0x0F0F0F0F; + res = res + (res >> 8); + return (res + (res >> 16)) & 0x000000FF; +} + +static int kvp_process_ip_address(void *addrp, + int family, char *buffer, + int length, int *offset) +{ + struct sockaddr_in *addr; + struct sockaddr_in6 *addr6; + int addr_length; + char tmp[50]; + const char *str; + + if (family == AF_INET) { + addr = (struct sockaddr_in *)addrp; + str = inet_ntop(family, &addr->sin_addr, tmp, 50); + addr_length = INET_ADDRSTRLEN; + } else { + addr6 = (struct sockaddr_in6 *)addrp; + str = inet_ntop(family, &addr6->sin6_addr.s6_addr, tmp, 50); + addr_length = INET6_ADDRSTRLEN; + } + + if ((length - *offset) < addr_length + 2) + return HV_E_FAIL; + if (str == NULL) { + strcpy(buffer, "inet_ntop failed\n"); + return HV_E_FAIL; + } + if (*offset == 0) + strcpy(buffer, tmp); + else { + strcat(buffer, ";"); + strcat(buffer, tmp); + } + + *offset += strlen(str) + 1; + + return 0; +} + static int -kvp_get_ip_address(int family, char *buffer, int length) +kvp_get_ip_info(int family, char *if_name, int op, + void *out_buffer, int length) { struct ifaddrs *ifap; struct ifaddrs *curp; - int ipv4_len = strlen("255.255.255.255") + 1; - int ipv6_len = strlen("ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff")+1; int offset = 0; - const char *str; - char tmp[50]; + int sn_offset = 0; int error = 0; + char *buffer; + struct hv_kvp_ipaddr_value *ip_buffer; + char cidr_mask[5]; /* /xyz */ + int weight; + int i; + unsigned int *w; + char *sn_str; + struct sockaddr_in6 *addr6; + if (op == KVP_OP_ENUMERATE) { + buffer = out_buffer; + } else { + ip_buffer = out_buffer; + buffer = (char *)ip_buffer->ip_addr; + ip_buffer->addr_family = 0; + } /* * On entry into this function, the buffer is capable of holding the - * maximum key value (2048 bytes). + * maximum key value. */ if (getifaddrs(&ifap)) { strcpy(buffer, "getifaddrs failed\n"); - return 1; + return HV_E_FAIL; } curp = ifap; while (curp != NULL) { - if ((curp->ifa_addr != NULL) && - (curp->ifa_addr->sa_family == family)) { - if (family == AF_INET) { - struct sockaddr_in *addr = - (struct sockaddr_in *) curp->ifa_addr; - - str = inet_ntop(family, &addr->sin_addr, - tmp, 50); - if (str == NULL) { - strcpy(buffer, "inet_ntop failed\n"); - error = 1; - goto getaddr_done; - } - if (offset == 0) - strcpy(buffer, tmp); - else - strcat(buffer, tmp); - strcat(buffer, ";"); + if (curp->ifa_addr == NULL) { + curp = curp->ifa_next; + continue; + } - offset += strlen(str) + 1; - if ((length - offset) < (ipv4_len + 1)) - goto getaddr_done; + if ((if_name != NULL) && + (strncmp(curp->ifa_name, if_name, strlen(if_name)))) { + /* + * We want info about a specific interface; + * just continue. + */ + curp = curp->ifa_next; + continue; + } - } else { + /* + * We only support two address families: AF_INET and AF_INET6. + * If a family value of 0 is specified, we collect both + * supported address families; if not we gather info on + * the specified address family. + */ + if ((((family != 0) && + (curp->ifa_addr->sa_family != family))) || + (curp->ifa_flags & IFF_LOOPBACK)) { + curp = curp->ifa_next; + continue; + } + if ((curp->ifa_addr->sa_family != AF_INET) && + (curp->ifa_addr->sa_family != AF_INET6)) { + curp = curp->ifa_next; + continue; + } + if (op == KVP_OP_GET_IP_INFO) { /* - * We only support AF_INET and AF_INET6 - * and the list of addresses is separated by a ";". + * Gather info other than the IP address. + * IP address info will be gathered later. */ - struct sockaddr_in6 *addr = - (struct sockaddr_in6 *) curp->ifa_addr; - - str = inet_ntop(family, - &addr->sin6_addr.s6_addr, - tmp, 50); - if (str == NULL) { - strcpy(buffer, "inet_ntop failed\n"); - error = 1; - goto getaddr_done; - } - if (offset == 0) - strcpy(buffer, tmp); - else - strcat(buffer, tmp); - strcat(buffer, ";"); - offset += strlen(str) + 1; - if ((length - offset) < (ipv6_len + 1)) - goto getaddr_done; + if (curp->ifa_addr->sa_family == AF_INET) { + ip_buffer->addr_family |= ADDR_FAMILY_IPV4; + /* + * Get subnet info. + */ + error = kvp_process_ip_address( + curp->ifa_netmask, + AF_INET, + (char *) + ip_buffer->sub_net, + length, + &sn_offset); + if (error) + goto gather_ipaddr; + } else { + ip_buffer->addr_family |= ADDR_FAMILY_IPV6; + /* + * Get subnet info in CIDR format. + */ + weight = 0; + sn_str = (char *)ip_buffer->sub_net; + addr6 = (struct sockaddr_in6 *) + curp->ifa_netmask; + w = addr6->sin6_addr.s6_addr32; + + for (i = 0; i < 4; i++) + weight += hweight32(&w[i]); + + sprintf(cidr_mask, "/%d", weight); + if ((length - sn_offset) < + (strlen(cidr_mask) + 1)) + goto gather_ipaddr; + + if (sn_offset == 0) + strcpy(sn_str, cidr_mask); + else { + strcat((char *)ip_buffer->sub_net, ";"); + strcat(sn_str, cidr_mask); + } + sn_offset += strlen(sn_str) + 1; } + /* + * Collect other ip related configuration info. + */ + + kvp_get_ipconfig_info(if_name, ip_buffer); } + +gather_ipaddr: + error = kvp_process_ip_address(curp->ifa_addr, + curp->ifa_addr->sa_family, + buffer, + length, &offset); + if (error) + goto getaddr_done; + curp = curp->ifa_next; } @@ -269,7 +1055,319 @@ getaddr_done: } -static int +static int expand_ipv6(char *addr, int type) +{ + int ret; + struct in6_addr v6_addr; + + ret = inet_pton(AF_INET6, addr, &v6_addr); + + if (ret != 1) { + if (type == NETMASK) + return 1; + return 0; + } + + sprintf(addr, "%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:" + "%02x%02x:%02x%02x:%02x%02x", + (int)v6_addr.s6_addr[0], (int)v6_addr.s6_addr[1], + (int)v6_addr.s6_addr[2], (int)v6_addr.s6_addr[3], + (int)v6_addr.s6_addr[4], (int)v6_addr.s6_addr[5], + (int)v6_addr.s6_addr[6], (int)v6_addr.s6_addr[7], + (int)v6_addr.s6_addr[8], (int)v6_addr.s6_addr[9], + (int)v6_addr.s6_addr[10], (int)v6_addr.s6_addr[11], + (int)v6_addr.s6_addr[12], (int)v6_addr.s6_addr[13], + (int)v6_addr.s6_addr[14], (int)v6_addr.s6_addr[15]); + + return 1; + +} + +static int is_ipv4(char *addr) +{ + int ret; + struct in_addr ipv4_addr; + + ret = inet_pton(AF_INET, addr, &ipv4_addr); + + if (ret == 1) + return 1; + return 0; +} + +static int parse_ip_val_buffer(char *in_buf, int *offset, + char *out_buf, int out_len) +{ + char *x; + char *start; + + /* + * in_buf has sequence of characters that are seperated by + * the character ';'. The last sequence does not have the + * terminating ";" character. + */ + start = in_buf + *offset; + + x = strchr(start, ';'); + if (x) + *x = 0; + else + x = start + strlen(start); + + if (strlen(start) != 0) { + int i = 0; + /* + * Get rid of leading spaces. + */ + while (start[i] == ' ') + i++; + + if ((x - start) <= out_len) { + strcpy(out_buf, (start + i)); + *offset += (x - start) + 1; + return 1; + } + } + return 0; +} + +static int kvp_write_file(FILE *f, char *s1, char *s2, char *s3) +{ + int ret; + + ret = fprintf(f, "%s%s%s%s\n", s1, s2, "=", s3); + + if (ret < 0) + return HV_E_FAIL; + + return 0; +} + + +static int process_ip_string(FILE *f, char *ip_string, int type) +{ + int error = 0; + char addr[INET6_ADDRSTRLEN]; + int i = 0; + int j = 0; + char str[256]; + char sub_str[10]; + int offset = 0; + + memset(addr, 0, sizeof(addr)); + + while (parse_ip_val_buffer(ip_string, &offset, addr, + (MAX_IP_ADDR_SIZE * 2))) { + + sub_str[0] = 0; + if (is_ipv4(addr)) { + switch (type) { + case IPADDR: + snprintf(str, sizeof(str), "%s", "IPADDR"); + break; + case NETMASK: + snprintf(str, sizeof(str), "%s", "NETMASK"); + break; + case GATEWAY: + snprintf(str, sizeof(str), "%s", "GATEWAY"); + break; + case DNS: + snprintf(str, sizeof(str), "%s", "DNS"); + break; + } + + if (type == DNS) { + snprintf(sub_str, sizeof(sub_str), "%d", ++i); + } else if (type == GATEWAY && i == 0) { + ++i; + } else { + snprintf(sub_str, sizeof(sub_str), "%d", i++); + } + + + } else if (expand_ipv6(addr, type)) { + switch (type) { + case IPADDR: + snprintf(str, sizeof(str), "%s", "IPV6ADDR"); + break; + case NETMASK: + snprintf(str, sizeof(str), "%s", "IPV6NETMASK"); + break; + case GATEWAY: + snprintf(str, sizeof(str), "%s", + "IPV6_DEFAULTGW"); + break; + case DNS: + snprintf(str, sizeof(str), "%s", "DNS"); + break; + } + + if (type == DNS) { + snprintf(sub_str, sizeof(sub_str), "%d", ++i); + } else if (j == 0) { + ++j; + } else { + snprintf(sub_str, sizeof(sub_str), "_%d", j++); + } + } else { + return HV_INVALIDARG; + } + + error = kvp_write_file(f, str, sub_str, addr); + if (error) + return error; + memset(addr, 0, sizeof(addr)); + } + + return 0; +} + +static int kvp_set_ip_info(char *if_name, struct hv_kvp_ipaddr_value *new_val) +{ + int error = 0; + char if_file[128]; + FILE *file; + char cmd[512]; + char *mac_addr; + + /* + * Set the configuration for the specified interface with + * the information provided. Since there is no standard + * way to configure an interface, we will have an external + * script that does the job of configuring the interface and + * flushing the configuration. + * + * The parameters passed to this external script are: + * 1. A configuration file that has the specified configuration. + * + * We will embed the name of the interface in the configuration + * file: ifcfg-ethx (where ethx is the interface name). + * + * The information provided here may be more than what is needed + * in a given distro to configure the interface and so are free + * ignore information that may not be relevant. + * + * Here is the format of the ip configuration file: + * + * HWADDR=macaddr + * DEVICE=interface name + * BOOTPROTO=<protocol> (where <protocol> is "dhcp" if DHCP is configured + * or "none" if no boot-time protocol should be used) + * + * IPADDR0=ipaddr1 + * IPADDR1=ipaddr2 + * IPADDRx=ipaddry (where y = x + 1) + * + * NETMASK0=netmask1 + * NETMASKx=netmasky (where y = x + 1) + * + * GATEWAY=ipaddr1 + * GATEWAYx=ipaddry (where y = x + 1) + * + * DNSx=ipaddrx (where first DNS address is tagged as DNS1 etc) + * + * IPV6 addresses will be tagged as IPV6ADDR, IPV6 gateway will be + * tagged as IPV6_DEFAULTGW and IPV6 NETMASK will be tagged as + * IPV6NETMASK. + * + * The host can specify multiple ipv4 and ipv6 addresses to be + * configured for the interface. Furthermore, the configuration + * needs to be persistent. A subsequent GET call on the interface + * is expected to return the configuration that is set via the SET + * call. + */ + + snprintf(if_file, sizeof(if_file), "%s%s%s", KVP_CONFIG_LOC, + "/ifcfg-", if_name); + + file = fopen(if_file, "w"); + + if (file == NULL) { + syslog(LOG_ERR, "Failed to open config file; error: %d %s", + errno, strerror(errno)); + return HV_E_FAIL; + } + + /* + * First write out the MAC address. + */ + + mac_addr = kvp_if_name_to_mac(if_name); + if (mac_addr == NULL) { + error = HV_E_FAIL; + goto setval_error; + } + + error = kvp_write_file(file, "HWADDR", "", mac_addr); + free(mac_addr); + if (error) + goto setval_error; + + error = kvp_write_file(file, "DEVICE", "", if_name); + if (error) + goto setval_error; + + if (new_val->dhcp_enabled) { + error = kvp_write_file(file, "BOOTPROTO", "", "dhcp"); + if (error) + goto setval_error; + + /* + * We are done!. + */ + goto setval_done; + + } else { + error = kvp_write_file(file, "BOOTPROTO", "", "none"); + if (error) + goto setval_error; + } + + /* + * Write the configuration for ipaddress, netmask, gateway and + * name servers. + */ + + error = process_ip_string(file, (char *)new_val->ip_addr, IPADDR); + if (error) + goto setval_error; + + error = process_ip_string(file, (char *)new_val->sub_net, NETMASK); + if (error) + goto setval_error; + + error = process_ip_string(file, (char *)new_val->gate_way, GATEWAY); + if (error) + goto setval_error; + + error = process_ip_string(file, (char *)new_val->dns_addr, DNS); + if (error) + goto setval_error; + +setval_done: + fclose(file); + + /* + * Now that we have populated the configuration file, + * invoke the external script to do its magic. + */ + + snprintf(cmd, sizeof(cmd), "%s %s", "hv_set_ifconfig", if_file); + if (system(cmd)) { + syslog(LOG_ERR, "Failed to execute cmd '%s'; error: %d %s", + cmd, errno, strerror(errno)); + return HV_E_FAIL; + } + return 0; + +setval_error: + syslog(LOG_ERR, "Failed to write config file"); + fclose(file); + return error; +} + + +static void kvp_get_domain_name(char *buffer, int length) { struct addrinfo hints, *info ; @@ -283,34 +1381,29 @@ kvp_get_domain_name(char *buffer, int length) error = getaddrinfo(buffer, NULL, &hints, &info); if (error != 0) { - strcpy(buffer, "getaddrinfo failed\n"); - return error; + snprintf(buffer, length, "getaddrinfo failed: 0x%x %s", + error, gai_strerror(error)); + return; } - strcpy(buffer, info->ai_canonname); + snprintf(buffer, length, "%s", info->ai_canonname); freeaddrinfo(info); - return error; } static int netlink_send(int fd, struct cn_msg *msg) { - struct nlmsghdr *nlh; + struct nlmsghdr nlh = { .nlmsg_type = NLMSG_DONE }; unsigned int size; struct msghdr message; - char buffer[64]; struct iovec iov[2]; - size = NLMSG_SPACE(sizeof(struct cn_msg) + msg->len); + size = sizeof(struct cn_msg) + msg->len; - nlh = (struct nlmsghdr *)buffer; - nlh->nlmsg_seq = 0; - nlh->nlmsg_pid = getpid(); - nlh->nlmsg_type = NLMSG_DONE; - nlh->nlmsg_len = NLMSG_LENGTH(size - sizeof(*nlh)); - nlh->nlmsg_flags = 0; + nlh.nlmsg_pid = getpid(); + nlh.nlmsg_len = NLMSG_LENGTH(size); - iov[0].iov_base = nlh; - iov[0].iov_len = sizeof(*nlh); + iov[0].iov_base = &nlh; + iov[0].iov_len = sizeof(nlh); iov[1].iov_base = msg; iov[1].iov_len = size; @@ -326,86 +1419,152 @@ netlink_send(int fd, struct cn_msg *msg) int main(void) { - int fd, len, sock_opt; + int fd, len, nl_group; int error; struct cn_msg *message; struct pollfd pfd; struct nlmsghdr *incoming_msg; struct cn_msg *incoming_cn_msg; - struct hv_ku_msg *hv_msg; + struct hv_kvp_msg *hv_msg; char *p; char *key_value; char *key_name; + int op; + int pool; + char *if_name; + struct hv_kvp_ipaddr_value *kvp_ip_val; + char *kvp_recv_buffer; + size_t kvp_recv_buffer_len; - daemon(1, 0); + if (daemon(1, 0)) + return 1; openlog("KVP", 0, LOG_USER); syslog(LOG_INFO, "KVP starting; pid is:%d", getpid()); + + kvp_recv_buffer_len = NLMSG_LENGTH(0) + sizeof(struct cn_msg) + sizeof(struct hv_kvp_msg); + kvp_recv_buffer = calloc(1, kvp_recv_buffer_len); + if (!kvp_recv_buffer) { + syslog(LOG_ERR, "Failed to allocate netlink buffer"); + exit(EXIT_FAILURE); + } /* * Retrieve OS release information. */ kvp_get_os_info(); + /* + * Cache Fully Qualified Domain Name because getaddrinfo takes an + * unpredictable amount of time to finish. + */ + kvp_get_domain_name(full_domain_name, sizeof(full_domain_name)); + + if (kvp_file_init()) { + syslog(LOG_ERR, "Failed to initialize the pools"); + exit(EXIT_FAILURE); + } fd = socket(AF_NETLINK, SOCK_DGRAM, NETLINK_CONNECTOR); if (fd < 0) { - syslog(LOG_ERR, "netlink socket creation failed; error:%d", fd); - exit(-1); + syslog(LOG_ERR, "netlink socket creation failed; error: %d %s", errno, + strerror(errno)); + exit(EXIT_FAILURE); } addr.nl_family = AF_NETLINK; addr.nl_pad = 0; addr.nl_pid = 0; - addr.nl_groups = CN_KVP_IDX; + addr.nl_groups = 0; error = bind(fd, (struct sockaddr *)&addr, sizeof(addr)); if (error < 0) { - syslog(LOG_ERR, "bind failed; error:%d", error); + syslog(LOG_ERR, "bind failed; error: %d %s", errno, strerror(errno)); close(fd); - exit(-1); + exit(EXIT_FAILURE); } - sock_opt = addr.nl_groups; - setsockopt(fd, 270, 1, &sock_opt, sizeof(sock_opt)); + nl_group = CN_KVP_IDX; + + if (setsockopt(fd, SOL_NETLINK, NETLINK_ADD_MEMBERSHIP, &nl_group, sizeof(nl_group)) < 0) { + syslog(LOG_ERR, "setsockopt failed; error: %d %s", errno, strerror(errno)); + close(fd); + exit(EXIT_FAILURE); + } + /* * Register ourselves with the kernel. */ - message = (struct cn_msg *)kvp_send_buffer; + message = (struct cn_msg *)kvp_recv_buffer; message->id.idx = CN_KVP_IDX; message->id.val = CN_KVP_VAL; - message->seq = KVP_REGISTER; + + hv_msg = (struct hv_kvp_msg *)message->data; + hv_msg->kvp_hdr.operation = KVP_OP_REGISTER1; message->ack = 0; - message->len = 0; + message->len = sizeof(struct hv_kvp_msg); len = netlink_send(fd, message); if (len < 0) { - syslog(LOG_ERR, "netlink_send failed; error:%d", len); + syslog(LOG_ERR, "netlink_send failed; error: %d %s", errno, strerror(errno)); close(fd); - exit(-1); + exit(EXIT_FAILURE); } pfd.fd = fd; while (1) { + struct sockaddr *addr_p = (struct sockaddr *) &addr; + socklen_t addr_l = sizeof(addr); pfd.events = POLLIN; pfd.revents = 0; - poll(&pfd, 1, -1); - len = recv(fd, kvp_recv_buffer, sizeof(kvp_recv_buffer), 0); + if (poll(&pfd, 1, -1) < 0) { + syslog(LOG_ERR, "poll failed; error: %d %s", errno, strerror(errno)); + if (errno == EINVAL) { + close(fd); + exit(EXIT_FAILURE); + } + else + continue; + } + + len = recvfrom(fd, kvp_recv_buffer, kvp_recv_buffer_len, 0, + addr_p, &addr_l); if (len < 0) { - syslog(LOG_ERR, "recv failed; error:%d", len); + syslog(LOG_ERR, "recvfrom failed; pid:%u error:%d %s", + addr.nl_pid, errno, strerror(errno)); close(fd); return -1; } + if (addr.nl_pid) { + syslog(LOG_WARNING, "Received packet from untrusted pid:%u", + addr.nl_pid); + continue; + } + incoming_msg = (struct nlmsghdr *)kvp_recv_buffer; + + if (incoming_msg->nlmsg_type != NLMSG_DONE) + continue; + incoming_cn_msg = (struct cn_msg *)NLMSG_DATA(incoming_msg); + hv_msg = (struct hv_kvp_msg *)incoming_cn_msg->data; - switch (incoming_cn_msg->seq) { - case KVP_REGISTER: + /* + * We will use the KVP header information to pass back + * the error from this daemon. So, first copy the state + * and set the error code to success. + */ + op = hv_msg->kvp_hdr.operation; + pool = hv_msg->kvp_hdr.pool; + hv_msg->error = HV_S_OK; + + if ((in_hand_shake) && (op == KVP_OP_REGISTER1)) { /* * Driver is registering with us; stash away the version * information. */ - p = (char *)incoming_cn_msg->data; + in_hand_shake = 0; + p = (char *)hv_msg->body.kvp_register.version; lic_version = malloc(strlen(p) + 1); if (lic_version) { strcpy(lic_version, p); @@ -415,21 +1574,107 @@ int main(void) syslog(LOG_ERR, "malloc failed"); } continue; + } + + switch (op) { + case KVP_OP_GET_IP_INFO: + kvp_ip_val = &hv_msg->body.kvp_ip_val; + if_name = + kvp_mac_to_if_name((char *)kvp_ip_val->adapter_id); + + if (if_name == NULL) { + /* + * We could not map the mac address to an + * interface name; return error. + */ + hv_msg->error = HV_E_FAIL; + break; + } + error = kvp_get_ip_info( + 0, if_name, KVP_OP_GET_IP_INFO, + kvp_ip_val, + (MAX_IP_ADDR_SIZE * 2)); + + if (error) + hv_msg->error = error; - case KVP_KERNEL_GET: + free(if_name); break; + + case KVP_OP_SET_IP_INFO: + kvp_ip_val = &hv_msg->body.kvp_ip_val; + if_name = kvp_get_if_name( + (char *)kvp_ip_val->adapter_id); + if (if_name == NULL) { + /* + * We could not map the guid to an + * interface name; return error. + */ + hv_msg->error = HV_GUID_NOTFOUND; + break; + } + error = kvp_set_ip_info(if_name, kvp_ip_val); + if (error) + hv_msg->error = error; + + free(if_name); + break; + + case KVP_OP_SET: + if (kvp_key_add_or_modify(pool, + hv_msg->body.kvp_set.data.key, + hv_msg->body.kvp_set.data.key_size, + hv_msg->body.kvp_set.data.value, + hv_msg->body.kvp_set.data.value_size)) + hv_msg->error = HV_S_CONT; + break; + + case KVP_OP_GET: + if (kvp_get_value(pool, + hv_msg->body.kvp_set.data.key, + hv_msg->body.kvp_set.data.key_size, + hv_msg->body.kvp_set.data.value, + hv_msg->body.kvp_set.data.value_size)) + hv_msg->error = HV_S_CONT; + break; + + case KVP_OP_DELETE: + if (kvp_key_delete(pool, + hv_msg->body.kvp_delete.key, + hv_msg->body.kvp_delete.key_size)) + hv_msg->error = HV_S_CONT; + break; + default: - continue; + break; + } + + if (op != KVP_OP_ENUMERATE) + goto kvp_done; + + /* + * If the pool is KVP_POOL_AUTO, dynamically generate + * both the key and the value; if not read from the + * appropriate pool. + */ + if (pool != KVP_POOL_AUTO) { + if (kvp_pool_enumerate(pool, + hv_msg->body.kvp_enum_data.index, + hv_msg->body.kvp_enum_data.data.key, + HV_KVP_EXCHANGE_MAX_KEY_SIZE, + hv_msg->body.kvp_enum_data.data.value, + HV_KVP_EXCHANGE_MAX_VALUE_SIZE)) + hv_msg->error = HV_S_CONT; + goto kvp_done; } - hv_msg = (struct hv_ku_msg *)incoming_cn_msg->data; - key_name = (char *)hv_msg->kvp_key; - key_value = (char *)hv_msg->kvp_value; + hv_msg = (struct hv_kvp_msg *)incoming_cn_msg->data; + key_name = (char *)hv_msg->body.kvp_enum_data.data.key; + key_value = (char *)hv_msg->body.kvp_enum_data.data.value; - switch (hv_msg->kvp_index) { + switch (hv_msg->body.kvp_enum_data.index) { case FullyQualifiedDomainName: - kvp_get_domain_name(key_value, - HV_KVP_EXCHANGE_MAX_VALUE_SIZE); + strcpy(key_value, full_domain_name); strcpy(key_name, "FullyQualifiedDomainName"); break; case IntegrationServicesVersion: @@ -437,13 +1682,13 @@ int main(void) strcpy(key_value, lic_version); break; case NetworkAddressIPv4: - kvp_get_ip_address(AF_INET, key_value, - HV_KVP_EXCHANGE_MAX_VALUE_SIZE); + kvp_get_ip_info(AF_INET, NULL, KVP_OP_ENUMERATE, + key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE); strcpy(key_name, "NetworkAddressIPv4"); break; case NetworkAddressIPv6: - kvp_get_ip_address(AF_INET6, key_value, - HV_KVP_EXCHANGE_MAX_VALUE_SIZE); + kvp_get_ip_info(AF_INET6, NULL, KVP_OP_ENUMERATE, + key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE); strcpy(key_name, "NetworkAddressIPv6"); break; case OSBuildNumber: @@ -463,7 +1708,7 @@ int main(void) strcpy(key_name, "OSMinorVersion"); break; case OSVersion: - strcpy(key_value, os_build); + strcpy(key_value, os_version); strcpy(key_name, "OSVersion"); break; case ProcessorArchitecture: @@ -471,11 +1716,7 @@ int main(void) strcpy(key_name, "ProcessorArchitecture"); break; default: - strcpy(key_value, "Unknown Key"); - /* - * We use a null key name to terminate enumeration. - */ - strcpy(key_name, ""); + hv_msg->error = HV_S_CONT; break; } /* @@ -483,17 +1724,18 @@ int main(void) * already in the receive buffer. Update the cn_msg header to * reflect the key value that has been added to the message */ +kvp_done: incoming_cn_msg->id.idx = CN_KVP_IDX; incoming_cn_msg->id.val = CN_KVP_VAL; - incoming_cn_msg->seq = KVP_USER_SET; incoming_cn_msg->ack = 0; - incoming_cn_msg->len = sizeof(struct hv_ku_msg); + incoming_cn_msg->len = sizeof(struct hv_kvp_msg); len = netlink_send(fd, incoming_cn_msg); if (len < 0) { - syslog(LOG_ERR, "net_link send failed; error:%d", len); - exit(-1); + syslog(LOG_ERR, "net_link send failed; error: %d %s", errno, + strerror(errno)); + exit(EXIT_FAILURE); } } diff --git a/tools/hv/hv_set_ifconfig.sh b/tools/hv/hv_set_ifconfig.sh new file mode 100755 index 00000000000..735aafd64a3 --- /dev/null +++ b/tools/hv/hv_set_ifconfig.sh @@ -0,0 +1,64 @@ +#!/bin/bash + +# This example script activates an interface based on the specified +# configuration. +# +# In the interest of keeping the KVP daemon code free of distro specific +# information; the kvp daemon code invokes this external script to configure +# the interface. +# +# The only argument to this script is the configuration file that is to +# be used to configure the interface. +# +# Each Distro is expected to implement this script in a distro specific +# fashion. For instance on Distros that ship with Network Manager enabled, +# this script can be based on the Network Manager APIs for configuring the +# interface. +# +# This example script is based on a RHEL environment. +# +# Here is the format of the ip configuration file: +# +# HWADDR=macaddr +# DEVICE=interface name +# BOOTPROTO=<protocol> (where <protocol> is "dhcp" if DHCP is configured +# or "none" if no boot-time protocol should be used) +# +# IPADDR0=ipaddr1 +# IPADDR1=ipaddr2 +# IPADDRx=ipaddry (where y = x + 1) +# +# NETMASK0=netmask1 +# NETMASKx=netmasky (where y = x + 1) +# +# GATEWAY=ipaddr1 +# GATEWAYx=ipaddry (where y = x + 1) +# +# DNSx=ipaddrx (where first DNS address is tagged as DNS1 etc) +# +# IPV6 addresses will be tagged as IPV6ADDR, IPV6 gateway will be +# tagged as IPV6_DEFAULTGW and IPV6 NETMASK will be tagged as +# IPV6NETMASK. +# +# The host can specify multiple ipv4 and ipv6 addresses to be +# configured for the interface. Furthermore, the configuration +# needs to be persistent. A subsequent GET call on the interface +# is expected to return the configuration that is set via the SET +# call. +# + + + +echo "IPV6INIT=yes" >> $1 +echo "NM_CONTROLLED=no" >> $1 +echo "PEERDNS=yes" >> $1 +echo "ONBOOT=yes" >> $1 + + +cp $1 /etc/sysconfig/network-scripts/ + + +interface=$(echo $1 | awk -F - '{ print $2 }') + +/sbin/ifdown $interface 2>/dev/null +/sbin/ifup $interface 2>/dev/null diff --git a/tools/hv/hv_vss_daemon.c b/tools/hv/hv_vss_daemon.c new file mode 100644 index 00000000000..6a213b8cd7b --- /dev/null +++ b/tools/hv/hv_vss_daemon.c @@ -0,0 +1,267 @@ +/* + * An implementation of the host initiated guest snapshot for Hyper-V. + * + * + * Copyright (C) 2013, Microsoft, Inc. + * Author : K. Y. Srinivasan <kys@microsoft.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + * 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, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for more + * details. + * + */ + + +#include <sys/types.h> +#include <sys/socket.h> +#include <sys/poll.h> +#include <sys/ioctl.h> +#include <fcntl.h> +#include <stdio.h> +#include <mntent.h> +#include <stdlib.h> +#include <unistd.h> +#include <string.h> +#include <ctype.h> +#include <errno.h> +#include <arpa/inet.h> +#include <linux/fs.h> +#include <linux/connector.h> +#include <linux/hyperv.h> +#include <linux/netlink.h> +#include <syslog.h> + +static struct sockaddr_nl addr; + +#ifndef SOL_NETLINK +#define SOL_NETLINK 270 +#endif + + +static int vss_do_freeze(char *dir, unsigned int cmd, char *fs_op) +{ + int ret, fd = open(dir, O_RDONLY); + + if (fd < 0) + return 1; + ret = ioctl(fd, cmd, 0); + syslog(LOG_INFO, "VSS: %s of %s: %s\n", fs_op, dir, strerror(errno)); + close(fd); + return !!ret; +} + +static int vss_operate(int operation) +{ + char *fs_op; + char match[] = "/dev/"; + FILE *mounts; + struct mntent *ent; + unsigned int cmd; + int error = 0, root_seen = 0; + + switch (operation) { + case VSS_OP_FREEZE: + cmd = FIFREEZE; + fs_op = "freeze"; + break; + case VSS_OP_THAW: + cmd = FITHAW; + fs_op = "thaw"; + break; + default: + return -1; + } + + mounts = setmntent("/proc/mounts", "r"); + if (mounts == NULL) + return -1; + + while ((ent = getmntent(mounts))) { + if (strncmp(ent->mnt_fsname, match, strlen(match))) + continue; + if (strcmp(ent->mnt_type, "iso9660") == 0) + continue; + if (strcmp(ent->mnt_type, "vfat") == 0) + continue; + if (strcmp(ent->mnt_dir, "/") == 0) { + root_seen = 1; + continue; + } + error |= vss_do_freeze(ent->mnt_dir, cmd, fs_op); + } + endmntent(mounts); + + if (root_seen) { + error |= vss_do_freeze("/", cmd, fs_op); + } + + return error; +} + +static int netlink_send(int fd, struct cn_msg *msg) +{ + struct nlmsghdr nlh = { .nlmsg_type = NLMSG_DONE }; + unsigned int size; + struct msghdr message; + struct iovec iov[2]; + + size = sizeof(struct cn_msg) + msg->len; + + nlh.nlmsg_pid = getpid(); + nlh.nlmsg_len = NLMSG_LENGTH(size); + + iov[0].iov_base = &nlh; + iov[0].iov_len = sizeof(nlh); + + iov[1].iov_base = msg; + iov[1].iov_len = size; + + memset(&message, 0, sizeof(message)); + message.msg_name = &addr; + message.msg_namelen = sizeof(addr); + message.msg_iov = iov; + message.msg_iovlen = 2; + + return sendmsg(fd, &message, 0); +} + +int main(void) +{ + int fd, len, nl_group; + int error; + struct cn_msg *message; + struct pollfd pfd; + struct nlmsghdr *incoming_msg; + struct cn_msg *incoming_cn_msg; + int op; + struct hv_vss_msg *vss_msg; + char *vss_recv_buffer; + size_t vss_recv_buffer_len; + + if (daemon(1, 0)) + return 1; + + openlog("Hyper-V VSS", 0, LOG_USER); + syslog(LOG_INFO, "VSS starting; pid is:%d", getpid()); + + vss_recv_buffer_len = NLMSG_LENGTH(0) + sizeof(struct cn_msg) + sizeof(struct hv_vss_msg); + vss_recv_buffer = calloc(1, vss_recv_buffer_len); + if (!vss_recv_buffer) { + syslog(LOG_ERR, "Failed to allocate netlink buffers"); + exit(EXIT_FAILURE); + } + + fd = socket(AF_NETLINK, SOCK_DGRAM, NETLINK_CONNECTOR); + if (fd < 0) { + syslog(LOG_ERR, "netlink socket creation failed; error:%d %s", + errno, strerror(errno)); + exit(EXIT_FAILURE); + } + addr.nl_family = AF_NETLINK; + addr.nl_pad = 0; + addr.nl_pid = 0; + addr.nl_groups = 0; + + + error = bind(fd, (struct sockaddr *)&addr, sizeof(addr)); + if (error < 0) { + syslog(LOG_ERR, "bind failed; error:%d %s", errno, strerror(errno)); + close(fd); + exit(EXIT_FAILURE); + } + nl_group = CN_VSS_IDX; + if (setsockopt(fd, SOL_NETLINK, NETLINK_ADD_MEMBERSHIP, &nl_group, sizeof(nl_group)) < 0) { + syslog(LOG_ERR, "setsockopt failed; error:%d %s", errno, strerror(errno)); + close(fd); + exit(EXIT_FAILURE); + } + /* + * Register ourselves with the kernel. + */ + message = (struct cn_msg *)vss_recv_buffer; + message->id.idx = CN_VSS_IDX; + message->id.val = CN_VSS_VAL; + message->ack = 0; + vss_msg = (struct hv_vss_msg *)message->data; + vss_msg->vss_hdr.operation = VSS_OP_REGISTER; + + message->len = sizeof(struct hv_vss_msg); + + len = netlink_send(fd, message); + if (len < 0) { + syslog(LOG_ERR, "netlink_send failed; error:%d %s", errno, strerror(errno)); + close(fd); + exit(EXIT_FAILURE); + } + + pfd.fd = fd; + + while (1) { + struct sockaddr *addr_p = (struct sockaddr *) &addr; + socklen_t addr_l = sizeof(addr); + pfd.events = POLLIN; + pfd.revents = 0; + + if (poll(&pfd, 1, -1) < 0) { + syslog(LOG_ERR, "poll failed; error:%d %s", errno, strerror(errno)); + if (errno == EINVAL) { + close(fd); + exit(EXIT_FAILURE); + } + else + continue; + } + + len = recvfrom(fd, vss_recv_buffer, vss_recv_buffer_len, 0, + addr_p, &addr_l); + + if (len < 0) { + syslog(LOG_ERR, "recvfrom failed; pid:%u error:%d %s", + addr.nl_pid, errno, strerror(errno)); + close(fd); + return -1; + } + + if (addr.nl_pid) { + syslog(LOG_WARNING, + "Received packet from untrusted pid:%u", + addr.nl_pid); + continue; + } + + incoming_msg = (struct nlmsghdr *)vss_recv_buffer; + + if (incoming_msg->nlmsg_type != NLMSG_DONE) + continue; + + incoming_cn_msg = (struct cn_msg *)NLMSG_DATA(incoming_msg); + vss_msg = (struct hv_vss_msg *)incoming_cn_msg->data; + op = vss_msg->vss_hdr.operation; + error = HV_S_OK; + + switch (op) { + case VSS_OP_FREEZE: + case VSS_OP_THAW: + error = vss_operate(op); + if (error) + error = HV_E_FAIL; + break; + default: + syslog(LOG_ERR, "Illegal op:%d\n", op); + } + vss_msg->error = error; + len = netlink_send(fd, incoming_cn_msg); + if (len < 0) { + syslog(LOG_ERR, "net_link send failed; error:%d %s", + errno, strerror(errno)); + exit(EXIT_FAILURE); + } + } + +} |