| /*** |
| This file is part of systemd. |
| |
| Copyright 2008-2012 Kay Sievers <kay@vrfy.org> |
| Copyright 2014 Tom Gundersen <teg@jklm.no> |
| |
| systemd is free software; you can redistribute it and/or modify it |
| under the terms of the GNU Lesser General Public License as published by |
| the Free Software Foundation; either version 2.1 of the License, or |
| (at your option) any later version. |
| |
| systemd is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public License |
| along with systemd; If not, see <http://www.gnu.org/licenses/>. |
| ***/ |
| |
| #include <ctype.h> |
| #include <sys/types.h> |
| #include <net/if.h> |
| |
| #include "util.h" |
| #include "macro.h" |
| #include "refcnt.h" |
| #include "path-util.h" |
| #include "strxcpyx.h" |
| #include "fileio.h" |
| #include "hashmap.h" |
| #include "set.h" |
| #include "strv.h" |
| #include "mkdir.h" |
| |
| #include "sd-device.h" |
| |
| #include "device-util.h" |
| #include "device-internal.h" |
| #include "device-private.h" |
| |
| int device_add_property(sd_device *device, const char *key, const char *value) { |
| int r; |
| |
| assert(device); |
| assert(key); |
| |
| r = device_add_property_aux(device, key, value, false); |
| if (r < 0) |
| return r; |
| |
| if (key[0] != '.') { |
| r = device_add_property_aux(device, key, value, true); |
| if (r < 0) |
| return r; |
| } |
| |
| return 0; |
| } |
| |
| static int device_add_property_internal_from_string(sd_device *device, const char *str) { |
| _cleanup_free_ char *key = NULL; |
| char *value; |
| |
| assert(device); |
| assert(str); |
| |
| key = strdup(str); |
| if (!key) |
| return -ENOMEM; |
| |
| value = strchr(key, '='); |
| if (!value) |
| return -EINVAL; |
| |
| *value = '\0'; |
| |
| if (isempty(++value)) |
| value = NULL; |
| |
| return device_add_property_internal(device, key, value); |
| } |
| |
| static int handle_db_line(sd_device *device, char key, const char *value) { |
| char *path; |
| int r; |
| |
| assert(device); |
| assert(value); |
| |
| switch (key) { |
| case 'S': |
| path = strjoina("/dev/", value); |
| r = device_add_devlink(device, path); |
| if (r < 0) |
| return r; |
| |
| break; |
| case 'L': |
| r = safe_atoi(value, &device->devlink_priority); |
| if (r < 0) |
| return r; |
| |
| break; |
| case 'E': |
| r = device_add_property_internal_from_string(device, value); |
| if (r < 0) |
| return r; |
| |
| break; |
| case 'G': |
| r = device_add_tag(device, value); |
| if (r < 0) |
| return r; |
| |
| break; |
| case 'W': |
| r = safe_atoi(value, &device->watch_handle); |
| if (r < 0) |
| return r; |
| |
| break; |
| case 'I': |
| r = device_set_usec_initialized(device, value); |
| if (r < 0) |
| return r; |
| |
| break; |
| default: |
| log_debug("device db: unknown key '%c'", key); |
| } |
| |
| return 0; |
| } |
| |
| void device_set_devlink_priority(sd_device *device, int priority) { |
| assert(device); |
| |
| device->devlink_priority = priority; |
| } |
| |
| void device_set_is_initialized(sd_device *device) { |
| assert(device); |
| |
| device->is_initialized = true; |
| } |
| |
| int device_ensure_usec_initialized(sd_device *device, sd_device *device_old) { |
| char num[DECIMAL_STR_MAX(usec_t)]; |
| usec_t usec_initialized; |
| int r; |
| |
| assert(device); |
| |
| if (device_old && device_old->usec_initialized > 0) |
| usec_initialized = device_old->usec_initialized; |
| else |
| usec_initialized = now(CLOCK_MONOTONIC); |
| |
| r = snprintf(num, sizeof(num), USEC_FMT, usec_initialized); |
| if (r < 0) |
| return -errno; |
| |
| r = device_set_usec_initialized(device, num); |
| if (r < 0) |
| return r; |
| |
| return 0; |
| } |
| |
| static int device_read_db(sd_device *device) { |
| _cleanup_free_ char *db = NULL; |
| char *path; |
| const char *id, *value; |
| char key; |
| size_t db_len; |
| unsigned i; |
| int r; |
| |
| enum { |
| PRE_KEY, |
| KEY, |
| PRE_VALUE, |
| VALUE, |
| INVALID_LINE, |
| } state = PRE_KEY; |
| |
| assert(device); |
| |
| if (device->db_loaded || device->sealed) |
| return 0; |
| |
| r = device_get_id_filename(device, &id); |
| if (r < 0) |
| return r; |
| |
| path = strjoina("/run/udev/data/", id); |
| |
| r = read_full_file(path, &db, &db_len); |
| if (r < 0) { |
| if (r == -ENOENT) |
| return 0; |
| else { |
| log_debug("sd-device: failed to read db '%s': %s", path, strerror(-r)); |
| return r; |
| } |
| } |
| |
| /* devices with a database entry are initialized */ |
| device_set_is_initialized(device); |
| |
| for (i = 0; i < db_len; i++) { |
| switch (state) { |
| case PRE_KEY: |
| if (!strchr(NEWLINE, db[i])) { |
| key = db[i]; |
| |
| state = KEY; |
| } |
| |
| break; |
| case KEY: |
| if (db[i] != ':') { |
| log_debug("sd-device: ignoring invalid db entry with key '%c'", key); |
| |
| state = INVALID_LINE; |
| } else { |
| db[i] = '\0'; |
| |
| state = PRE_VALUE; |
| } |
| |
| break; |
| case PRE_VALUE: |
| value = &db[i]; |
| |
| state = VALUE; |
| |
| break; |
| case INVALID_LINE: |
| if (strchr(NEWLINE, db[i])) |
| state = PRE_KEY; |
| |
| break; |
| case VALUE: |
| if (strchr(NEWLINE, db[i])) { |
| db[i] = '\0'; |
| r = handle_db_line(device, key, value); |
| if (r < 0) |
| log_debug("sd-device: failed to handle db entry '%c:%s': %s", key, value, strerror(-r)); |
| |
| state = PRE_KEY; |
| } |
| |
| break; |
| default: |
| assert_not_reached("invalid state when parsing db"); |
| } |
| } |
| |
| device->db_loaded = true; |
| |
| return 0; |
| } |
| |
| uint64_t device_get_properties_generation(sd_device *device) { |
| assert(device); |
| |
| return device->properties_generation; |
| } |
| |
| uint64_t device_get_tags_generation(sd_device *device) { |
| assert(device); |
| |
| return device->tags_generation; |
| } |
| |
| uint64_t device_get_devlinks_generation(sd_device *device) { |
| assert(device); |
| |
| return device->devlinks_generation; |
| } |
| |
| int device_get_devnode_mode(sd_device *device, mode_t *mode) { |
| int r; |
| |
| assert(device); |
| assert(mode); |
| |
| r = device_read_db(device); |
| if (r < 0) |
| return r; |
| |
| *mode = device->devmode; |
| |
| return 0; |
| } |
| |
| int device_get_devnode_uid(sd_device *device, uid_t *uid) { |
| int r; |
| |
| assert(device); |
| assert(uid); |
| |
| r = device_read_db(device); |
| if (r < 0) |
| return r; |
| |
| *uid = device->devuid; |
| |
| return 0; |
| } |
| |
| static int device_set_devuid(sd_device *device, const char *uid) { |
| unsigned u; |
| int r; |
| |
| assert(device); |
| assert(uid); |
| |
| r = safe_atou(uid, &u); |
| if (r < 0) |
| return r; |
| |
| r = device_add_property_internal(device, "DEVUID", uid); |
| if (r < 0) |
| return r; |
| |
| device->devuid = u; |
| |
| return 0; |
| } |
| |
| int device_get_devnode_gid(sd_device *device, gid_t *gid) { |
| int r; |
| |
| assert(device); |
| assert(gid); |
| |
| r = device_read_db(device); |
| if (r < 0) |
| return r; |
| |
| *gid = device->devgid; |
| |
| return 0; |
| } |
| |
| static int device_set_devgid(sd_device *device, const char *gid) { |
| unsigned g; |
| int r; |
| |
| assert(device); |
| assert(gid); |
| |
| r = safe_atou(gid, &g); |
| if (r < 0) |
| return r; |
| |
| r = device_add_property_internal(device, "DEVGID", gid); |
| if (r < 0) |
| return r; |
| |
| device->devgid = g; |
| |
| return 0; |
| } |
| |
| static int device_amend(sd_device *device, const char *key, const char *value) { |
| int r; |
| |
| assert(device); |
| assert(key); |
| assert(value); |
| |
| if (streq(key, "DEVPATH")) { |
| char *path; |
| |
| path = strjoina("/sys", value); |
| |
| /* the caller must verify or trust this data (e.g., if it comes from the kernel) */ |
| r = device_set_syspath(device, path, false); |
| if (r < 0) |
| return log_debug_errno(r, "sd-device: could not set syspath to '%s': %m", path); |
| } else if (streq(key, "SUBSYSTEM")) { |
| r = device_set_subsystem(device, value); |
| if (r < 0) |
| return log_debug_errno(r, "sd-device: could not set subsystem to '%s': %m", value); |
| } else if (streq(key, "DEVTYPE")) { |
| r = device_set_devtype(device, value); |
| if (r < 0) |
| return log_debug_errno(r, "sd-device: could not set devtype to '%s': %m", value); |
| } else if (streq(key, "DEVNAME")) { |
| r = device_set_devname(device, value); |
| if (r < 0) |
| return log_debug_errno(r, "sd-device: could not set devname to '%s': %m", value); |
| } else if (streq(key, "USEC_INITIALIZED")) { |
| r = device_set_usec_initialized(device, value); |
| if (r < 0) |
| return log_debug_errno(r, "sd-device: could not set usec-initialized to '%s': %m", value); |
| } else if (streq(key, "DRIVER")) { |
| r = device_set_driver(device, value); |
| if (r < 0) |
| return log_debug_errno(r, "sd-device: could not set driver to '%s': %m", value); |
| } else if (streq(key, "IFINDEX")) { |
| r = device_set_ifindex(device, value); |
| if (r < 0) |
| return log_debug_errno(r, "sd-device: could not set ifindex to '%s': %m", value); |
| } else if (streq(key, "DEVMODE")) { |
| r = device_set_devmode(device, value); |
| if (r < 0) |
| return log_debug_errno(r, "sd-device: could not set devmode to '%s': %m", value); |
| } else if (streq(key, "DEVUID")) { |
| r = device_set_devuid(device, value); |
| if (r < 0) |
| return log_debug_errno(r, "sd-device: could not set devuid to '%s': %m", value); |
| } else if (streq(key, "DEVGID")) { |
| r = device_set_devgid(device, value); |
| if (r < 0) |
| return log_debug_errno(r, "sd-device: could not set devgid to '%s': %m", value); |
| } else if (streq(key, "DEVLINKS")) { |
| const char *word, *state; |
| size_t l; |
| |
| FOREACH_WORD(word, l, value, state) { |
| char devlink[l + 1]; |
| |
| strncpy(devlink, word, l); |
| devlink[l] = '\0'; |
| |
| r = device_add_devlink(device, devlink); |
| if (r < 0) |
| return log_debug_errno(r, "sd-device: could not add devlink '%s': %m", devlink); |
| } |
| } else if (streq(key, "TAGS")) { |
| const char *word, *state; |
| size_t l; |
| |
| FOREACH_WORD_SEPARATOR(word, l, value, ":", state) { |
| char tag[l + 1]; |
| |
| (void)strncpy(tag, word, l); |
| tag[l] = '\0'; |
| |
| r = device_add_tag(device, tag); |
| if (r < 0) |
| return log_debug_errno(r, "sd-device: could not add tag '%s': %m", tag); |
| } |
| } else { |
| r = device_add_property_internal(device, key, value); |
| if (r < 0) |
| return log_debug_errno(r, "sd-device: could not add property '%s=%s': %m", key, value); |
| } |
| |
| return 0; |
| } |
| |
| static const char* const device_action_table[_DEVICE_ACTION_MAX] = { |
| [DEVICE_ACTION_ADD] = "add", |
| [DEVICE_ACTION_REMOVE] = "remove", |
| [DEVICE_ACTION_CHANGE] = "change", |
| [DEVICE_ACTION_MOVE] = "move", |
| [DEVICE_ACTION_ONLINE] = "online", |
| [DEVICE_ACTION_OFFLINE] = "offline", |
| }; |
| |
| DEFINE_STRING_TABLE_LOOKUP(device_action, DeviceAction); |
| |
| static int device_append(sd_device *device, char *key, const char **_major, const char **_minor, uint64_t *_seqnum, |
| DeviceAction *_action) { |
| DeviceAction action = _DEVICE_ACTION_INVALID; |
| uint64_t seqnum = 0; |
| const char *major = NULL, *minor = NULL; |
| char *value; |
| int r; |
| |
| assert(device); |
| assert(key); |
| assert(_major); |
| assert(_minor); |
| assert(_seqnum); |
| assert(_action); |
| |
| value = strchr(key, '='); |
| if (!value) { |
| log_debug("sd-device: not a key-value pair: '%s'", key); |
| return -EINVAL; |
| } |
| |
| *value = '\0'; |
| |
| value++; |
| |
| if (streq(key, "MAJOR")) |
| major = value; |
| else if (streq(key, "MINOR")) |
| minor = value; |
| else { |
| if (streq(key, "ACTION")) { |
| action = device_action_from_string(value); |
| if (action == _DEVICE_ACTION_INVALID) |
| return -EINVAL; |
| } else if (streq(key, "SEQNUM")) { |
| r = safe_atou64(value, &seqnum); |
| if (r < 0) |
| return r; |
| else if (seqnum == 0) |
| /* kernel only sends seqnum > 0 */ |
| return -EINVAL; |
| } |
| |
| r = device_amend(device, key, value); |
| if (r < 0) |
| return r; |
| } |
| |
| if (major != 0) |
| *_major = major; |
| |
| if (minor != 0) |
| *_minor = minor; |
| |
| if (action != _DEVICE_ACTION_INVALID) |
| *_action = action; |
| |
| if (seqnum > 0) |
| *_seqnum = seqnum; |
| |
| return 0; |
| } |
| |
| void device_seal(sd_device *device) { |
| assert(device); |
| |
| device->sealed = true; |
| } |
| |
| static int device_verify(sd_device *device, DeviceAction action, uint64_t seqnum) { |
| assert(device); |
| |
| if (!device->devpath || !device->subsystem || action == _DEVICE_ACTION_INVALID || seqnum == 0) { |
| log_debug("sd-device: device created from strv lacks devpath, subsystem, action or seqnum"); |
| return -EINVAL; |
| } |
| |
| device->sealed = true; |
| |
| return 0; |
| } |
| |
| int device_new_from_strv(sd_device **ret, char **strv) { |
| _cleanup_device_unref_ sd_device *device = NULL; |
| char **key; |
| const char *major = NULL, *minor = NULL; |
| DeviceAction action = _DEVICE_ACTION_INVALID; |
| uint64_t seqnum; |
| int r; |
| |
| assert(ret); |
| assert(strv); |
| |
| r = device_new_aux(&device); |
| if (r < 0) |
| return r; |
| |
| STRV_FOREACH(key, strv) { |
| r = device_append(device, *key, &major, &minor, &seqnum, &action); |
| if (r < 0) |
| return r; |
| } |
| |
| if (major) { |
| r = device_set_devnum(device, major, minor); |
| if (r < 0) |
| return log_debug_errno(r, "sd-device: could not set devnum %s:%s: %m", major, minor); |
| } |
| |
| r = device_verify(device, action, seqnum); |
| if (r < 0) |
| return r; |
| |
| *ret = device; |
| device = NULL; |
| |
| return 0; |
| } |
| |
| int device_new_from_nulstr(sd_device **ret, uint8_t *nulstr, size_t len) { |
| _cleanup_device_unref_ sd_device *device = NULL; |
| const char *major = NULL, *minor = NULL; |
| DeviceAction action = _DEVICE_ACTION_INVALID; |
| uint64_t seqnum; |
| unsigned i = 0; |
| int r; |
| |
| assert(ret); |
| assert(nulstr); |
| assert(len); |
| |
| r = device_new_aux(&device); |
| if (r < 0) |
| return r; |
| |
| while (i < len) { |
| char *key; |
| const char *end; |
| |
| key = (char*)&nulstr[i]; |
| end = memchr(key, '\0', len - i); |
| if (!end) { |
| log_debug("sd-device: failed to parse nulstr"); |
| return -EINVAL; |
| } |
| i += end - key + 1; |
| |
| r = device_append(device, key, &major, &minor, &seqnum, &action); |
| if (r < 0) |
| return r; |
| } |
| |
| if (major) { |
| r = device_set_devnum(device, major, minor); |
| if (r < 0) |
| return log_debug_errno(r, "sd-device: could not set devnum %s:%s: %m", major, minor); |
| } |
| |
| r = device_verify(device, action, seqnum); |
| if (r < 0) |
| return r; |
| |
| *ret = device; |
| device = NULL; |
| |
| return 0; |
| } |
| |
| static int device_update_properties_bufs(sd_device *device) { |
| const char *val, *prop; |
| _cleanup_free_ char **buf_strv = NULL; |
| _cleanup_free_ uint8_t *buf_nulstr = NULL; |
| size_t allocated_nulstr = 0; |
| size_t nulstr_len = 0, num = 0, i = 0; |
| |
| assert(device); |
| |
| if (!device->properties_buf_outdated) |
| return 0; |
| |
| FOREACH_DEVICE_PROPERTY(device, prop, val) { |
| size_t len = 0; |
| |
| len = strlen(prop) + 1 + strlen(val); |
| |
| buf_nulstr = GREEDY_REALLOC0(buf_nulstr, allocated_nulstr, nulstr_len + len + 2); |
| if (!buf_nulstr) |
| return -ENOMEM; |
| |
| strscpyl((char *)buf_nulstr + nulstr_len, len + 1, prop, "=", val, NULL); |
| nulstr_len += len + 1; |
| ++num; |
| } |
| |
| /* build buf_strv from buf_nulstr */ |
| buf_strv = new0(char *, num + 1); |
| if (!buf_strv) |
| return -ENOMEM; |
| |
| NULSTR_FOREACH(val, (char*) buf_nulstr) { |
| buf_strv[i] = (char *) val; |
| assert(i < num); |
| i++; |
| } |
| |
| free(device->properties_nulstr); |
| device->properties_nulstr = buf_nulstr; |
| buf_nulstr = NULL; |
| device->properties_nulstr_len = nulstr_len; |
| free(device->properties_strv); |
| device->properties_strv = buf_strv; |
| buf_strv = NULL; |
| |
| device->properties_buf_outdated = false; |
| |
| return 0; |
| } |
| |
| int device_get_properties_nulstr(sd_device *device, const uint8_t **nulstr, size_t *len) { |
| int r; |
| |
| assert(device); |
| assert(nulstr); |
| assert(len); |
| |
| r = device_update_properties_bufs(device); |
| if (r < 0) |
| return r; |
| |
| *nulstr = device->properties_nulstr; |
| *len = device->properties_nulstr_len; |
| |
| return 0; |
| } |
| |
| int device_get_properties_strv(sd_device *device, char ***strv) { |
| int r; |
| |
| assert(device); |
| assert(strv); |
| |
| r = device_update_properties_bufs(device); |
| if (r < 0) |
| return r; |
| |
| *strv = device->properties_strv; |
| |
| return 0; |
| } |
| |
| int device_get_devlink_priority(sd_device *device, int *priority) { |
| int r; |
| |
| assert(device); |
| assert(priority); |
| |
| r = device_read_db(device); |
| if (r < 0) |
| return r; |
| |
| *priority = device->devlink_priority; |
| |
| return 0; |
| } |
| |
| int device_get_watch_handle(sd_device *device, int *handle) { |
| int r; |
| |
| assert(device); |
| assert(handle); |
| |
| r = device_read_db(device); |
| if (r < 0) |
| return r; |
| |
| *handle = device->watch_handle; |
| |
| return 0; |
| } |
| |
| void device_set_watch_handle(sd_device *device, int handle) { |
| assert(device); |
| |
| device->watch_handle = handle; |
| } |
| |
| int device_rename(sd_device *device, const char *name) { |
| _cleanup_free_ char *dirname = NULL; |
| char *new_syspath; |
| const char *interface; |
| int r; |
| |
| assert(device); |
| assert(name); |
| |
| dirname = dirname_malloc(device->syspath); |
| if (!dirname) |
| return -ENOMEM; |
| |
| new_syspath = strjoina(dirname, "/", name); |
| |
| /* the user must trust that the new name is correct */ |
| r = device_set_syspath(device, new_syspath, false); |
| if (r < 0) |
| return r; |
| |
| r = sd_device_get_property_value(device, "INTERFACE", &interface); |
| if (r >= 0) { |
| r = device_add_property_internal(device, "INTERFACE", name); |
| if (r < 0) |
| return r; |
| |
| /* like DEVPATH_OLD, INTERFACE_OLD is not saved to the db, but only stays around for the current event */ |
| r = device_add_property_internal(device, "INTERFACE_OLD", interface); |
| if (r < 0) |
| return r; |
| } else if (r != -ENOENT) |
| return r; |
| |
| return 0; |
| } |
| |
| int device_shallow_clone(sd_device *old_device, sd_device **new_device) { |
| _cleanup_device_unref_ sd_device *ret = NULL; |
| int r; |
| |
| assert(old_device); |
| assert(new_device); |
| |
| r = device_new_aux(&ret); |
| if (r < 0) |
| return r; |
| |
| r = device_set_syspath(ret, old_device->syspath, false); |
| if (r < 0) |
| return r; |
| |
| r = device_set_subsystem(ret, old_device->subsystem); |
| if (r < 0) |
| return r; |
| |
| ret->devnum = old_device->devnum; |
| |
| *new_device = ret; |
| ret = NULL; |
| |
| return 0; |
| } |
| |
| int device_clone_with_db(sd_device *old_device, sd_device **new_device) { |
| _cleanup_device_unref_ sd_device *ret = NULL; |
| int r; |
| |
| assert(old_device); |
| assert(new_device); |
| |
| r = device_shallow_clone(old_device, &ret); |
| if (r < 0) |
| return r; |
| |
| r = device_read_db(ret); |
| if (r < 0) |
| return r; |
| |
| ret->sealed = true; |
| |
| *new_device = ret; |
| ret = NULL; |
| |
| return 0; |
| } |
| |
| int device_new_from_synthetic_event(sd_device **new_device, const char *syspath, const char *action) { |
| _cleanup_device_unref_ sd_device *ret = NULL; |
| int r; |
| |
| assert(new_device); |
| assert(syspath); |
| assert(action); |
| |
| r = sd_device_new_from_syspath(&ret, syspath); |
| if (r < 0) |
| return r; |
| |
| r = device_read_uevent_file(ret); |
| if (r < 0) |
| return r; |
| |
| r = device_add_property_internal(ret, "ACTION", action); |
| if (r < 0) |
| return r; |
| |
| *new_device = ret; |
| ret = NULL; |
| |
| return 0; |
| } |
| |
| int device_copy_properties(sd_device *device_dst, sd_device *device_src) { |
| const char *property, *value; |
| int r; |
| |
| assert(device_dst); |
| assert(device_src); |
| |
| FOREACH_DEVICE_PROPERTY(device_src, property, value) { |
| r = device_add_property(device_dst, property, value); |
| if (r < 0) |
| return r; |
| } |
| |
| return 0; |
| } |
| |
| void device_cleanup_tags(sd_device *device) { |
| assert(device); |
| |
| set_free_free(device->tags); |
| device->tags = NULL; |
| device->property_tags_outdated = true; |
| device->tags_generation ++; |
| } |
| |
| void device_cleanup_devlinks(sd_device *device) { |
| assert(device); |
| |
| set_free_free(device->devlinks); |
| device->devlinks = NULL; |
| device->property_devlinks_outdated = true; |
| device->devlinks_generation ++; |
| } |
| |
| void device_remove_tag(sd_device *device, const char *tag) { |
| assert(device); |
| assert(tag); |
| |
| free(set_remove(device->tags, tag)); |
| device->property_tags_outdated = true; |
| device->tags_generation ++; |
| } |
| |
| static int device_tag(sd_device *device, const char *tag, bool add) { |
| const char *id; |
| char *path; |
| int r; |
| |
| assert(device); |
| assert(tag); |
| |
| r = device_get_id_filename(device, &id); |
| if (r < 0) |
| return r; |
| |
| path = strjoina("/run/udev/tags/", tag, "/", id); |
| |
| if (add) { |
| r = touch_file(path, true, USEC_INFINITY, UID_INVALID, GID_INVALID, 0444); |
| if (r < 0) |
| return r; |
| } else { |
| r = unlink(path); |
| if (r < 0 && errno != ENOENT) |
| return -errno; |
| } |
| |
| return 0; |
| } |
| |
| int device_tag_index(sd_device *device, sd_device *device_old, bool add) { |
| const char *tag; |
| int r = 0, k; |
| |
| if (add && device_old) { |
| /* delete possible left-over tags */ |
| FOREACH_DEVICE_TAG(device_old, tag) { |
| if (!sd_device_has_tag(device, tag)) { |
| k = device_tag(device_old, tag, false); |
| if (r >= 0 && k < 0) |
| r = k; |
| } |
| } |
| } |
| |
| FOREACH_DEVICE_TAG(device, tag) { |
| k = device_tag(device, tag, add); |
| if (r >= 0 && k < 0) |
| r = k; |
| } |
| |
| return r; |
| } |
| |
| static bool device_has_info(sd_device *device) { |
| assert(device); |
| |
| if (!set_isempty(device->devlinks)) |
| return true; |
| |
| if (device->devlink_priority != 0) |
| return true; |
| |
| if (!ordered_hashmap_isempty(device->properties_db)) |
| return true; |
| |
| if (!set_isempty(device->tags)) |
| return true; |
| |
| if (device->watch_handle >= 0) |
| return true; |
| |
| return false; |
| } |
| |
| void device_set_db_persist(sd_device *device) { |
| assert(device); |
| |
| device->db_persist = true; |
| } |
| |
| int device_update_db(sd_device *device) { |
| const char *id; |
| char *path; |
| _cleanup_fclose_ FILE *f = NULL; |
| _cleanup_free_ char *path_tmp = NULL; |
| bool has_info; |
| int r; |
| |
| assert(device); |
| |
| has_info = device_has_info(device); |
| |
| r = device_get_id_filename(device, &id); |
| if (r < 0) |
| return r; |
| |
| path = strjoina("/run/udev/data/", id); |
| |
| /* do not store anything for otherwise empty devices */ |
| if (!has_info && major(device->devnum) == 0 && device->ifindex == 0) { |
| r = unlink(path); |
| if (r < 0 && errno != ENOENT) |
| return -errno; |
| |
| return 0; |
| } |
| |
| /* write a database file */ |
| r = mkdir_parents(path, 0755); |
| if (r < 0) |
| return r; |
| |
| r = fopen_temporary(path, &f, &path_tmp); |
| if (r < 0) |
| return r; |
| |
| /* |
| * set 'sticky' bit to indicate that we should not clean the |
| * database when we transition from initramfs to the real root |
| */ |
| if (device->db_persist) { |
| r = fchmod(fileno(f), 01644); |
| if (r < 0) { |
| r = -errno; |
| goto fail; |
| } |
| } else { |
| r = fchmod(fileno(f), 0644); |
| if (r < 0) { |
| r = -errno; |
| goto fail; |
| } |
| } |
| |
| if (has_info) { |
| const char *property, *value, *tag; |
| Iterator i; |
| |
| if (major(device->devnum) > 0) { |
| const char *devlink; |
| |
| FOREACH_DEVICE_DEVLINK(device, devlink) |
| fprintf(f, "S:%s\n", devlink + strlen("/dev/")); |
| |
| if (device->devlink_priority != 0) |
| fprintf(f, "L:%i\n", device->devlink_priority); |
| |
| if (device->watch_handle >= 0) |
| fprintf(f, "W:%i\n", device->watch_handle); |
| } |
| |
| if (device->usec_initialized > 0) |
| fprintf(f, "I:"USEC_FMT"\n", device->usec_initialized); |
| |
| ORDERED_HASHMAP_FOREACH_KEY(value, property, device->properties_db, i) |
| fprintf(f, "E:%s=%s\n", property, value); |
| |
| FOREACH_DEVICE_TAG(device, tag) |
| fprintf(f, "G:%s\n", tag); |
| } |
| |
| r = fflush_and_check(f); |
| if (r < 0) |
| goto fail; |
| |
| r = rename(path_tmp, path); |
| if (r < 0) { |
| r = -errno; |
| goto fail; |
| } |
| |
| log_debug("created %s file '%s' for '%s'", has_info ? "db" : "empty", |
| path, device->devpath); |
| |
| return 0; |
| |
| fail: |
| log_error_errno(r, "failed to create %s file '%s' for '%s'", has_info ? "db" : "empty", |
| path, device->devpath); |
| unlink(path); |
| unlink(path_tmp); |
| |
| return r; |
| } |
| |
| int device_delete_db(sd_device *device) { |
| const char *id; |
| char *path; |
| int r; |
| |
| assert(device); |
| |
| r = device_get_id_filename(device, &id); |
| if (r < 0) |
| return r; |
| |
| path = strjoina("/run/udev/data/", id); |
| |
| r = unlink(path); |
| if (r < 0 && errno != ENOENT) |
| return -errno; |
| |
| return 0; |
| } |
| |
| int device_read_db_force(sd_device *device) { |
| assert(device); |
| |
| return device_read_db_aux(device, true); |
| } |