From a0fe2a2d2028ea8b5e6873b1f55e91a36081656c Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Tue, 26 Apr 2016 15:47:55 +0200 Subject: journal: when creating a new journal file, fsync() the directory it is created in too Fixes: #2831 --- src/basic/fd-util.c | 8 +++++++- src/journal/journal-file.c | 36 ++++++++++++++++++++++++++++++++++++ 2 files changed, 43 insertions(+), 1 deletion(-) (limited to 'src') diff --git a/src/basic/fd-util.c b/src/basic/fd-util.c index 9130d023d7..8b466cff15 100644 --- a/src/basic/fd-util.c +++ b/src/basic/fd-util.c @@ -361,8 +361,14 @@ bool fdname_is_valid(const char *s) { int fd_get_path(int fd, char **ret) { char procfs_path[strlen("/proc/self/fd/") + DECIMAL_STR_MAX(int)]; + int r; xsprintf(procfs_path, "/proc/self/fd/%i", fd); - return readlink_malloc(procfs_path, ret); + r = readlink_malloc(procfs_path, ret); + + if (r == -ENOENT) /* If the file doesn't exist the fd is invalid */ + return -EBADF; + + return r; } diff --git a/src/journal/journal-file.c b/src/journal/journal-file.c index 35f4abab1d..a58079bdd1 100644 --- a/src/journal/journal-file.c +++ b/src/journal/journal-file.c @@ -439,6 +439,39 @@ static int journal_file_init_header(JournalFile *f, JournalFile *template) { return 0; } +static int fsync_directory_of_file(int fd) { + _cleanup_free_ char *path = NULL, *dn = NULL; + _cleanup_close_ int dfd = -1; + struct stat st; + int r; + + if (fstat(fd, &st) < 0) + return -errno; + + if (!S_ISREG(st.st_mode)) + return -EBADFD; + + r = fd_get_path(fd, &path); + if (r < 0) + return r; + + if (!path_is_absolute(path)) + return -EINVAL; + + dn = dirname_malloc(path); + if (!dn) + return -ENOMEM; + + dfd = open(dn, O_RDONLY|O_CLOEXEC|O_DIRECTORY); + if (dfd < 0) + return -errno; + + if (fsync(dfd) < 0) + return -errno; + + return 0; +} + static int journal_file_refresh_header(JournalFile *f) { sd_id128_t boot_id; int r; @@ -464,6 +497,9 @@ static int journal_file_refresh_header(JournalFile *f) { /* Sync the online state to disk */ (void) fsync(f->fd); + /* We likely just created a new file, also sync the directory this file is located in. */ + (void) fsync_directory_of_file(f->fd); + return r; } -- cgit v1.2.3-54-g00ecf From 076ea6f6d2d9d119cd467e7776e020d5766e2577 Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Tue, 26 Apr 2016 16:19:28 +0200 Subject: networkd: clean up DUID code a bit Let's move DUID configuration into the [DHCP] section, since it only makes sense in a DHCP context, and should be close to the configuration of ClientIdentifier= and suchlike. This really shouldn't be a section of its own, we don't have any for any of our other per-protocol specific identifiers... Follow-up for #2890 #2943 --- man/systemd.network.xml | 59 ++++++++++++-------------------- src/network/networkd-conf.c | 55 ++++++++++++++++------------- src/network/networkd-gperf.gperf | 4 +-- src/network/networkd-network-gperf.gperf | 4 +-- src/network/networkd-network.c | 1 - 5 files changed, 57 insertions(+), 66 deletions(-) (limited to 'src') diff --git a/man/systemd.network.xml b/man/systemd.network.xml index 9bf1b198ad..2a20748376 100644 --- a/man/systemd.network.xml +++ b/man/systemd.network.xml @@ -815,9 +815,8 @@ ClientIdentifier= - DHCP client identifier to use. Either mac - to use the MAC address of the link or duid - (the default) to use a RFC4361-compliant Client ID. + The DHCPv4 client identifier to use. Either mac to use the MAC address of the link + or duid (the default, see below) to use a RFC4361-compliant Client ID. @@ -827,6 +826,25 @@ type and configuration. + + DUIDRawData= + Specifies the DHCP DUID bytes as a single newline-terminated, hexadecimal string, with each + byte separated by a ':'. A DHCPv6 client sends the DHCP Unique Identifier (DUID) and the interface Identity + Association Identifier (IAID) to a DHCP server when acquiring a dynamic IPv6 address. Similar, DHCPv4 clients + send the IAID and DUID to the DHCP server when acquiring a dynamic IPv4 address if + . IAID and DUID allows a DHCP server to uniquely identify the machine + and the interface requesting a DHCP IP address. + + The DUID value specified here takes precedence over the DUID that systemd-networkd generates + using the machine-id from the /etc/machine-id file, as well as the + global DUID that may be specified in networkd.conf + 5. + + The configured DHCP DUID should conform to the specification in + RFC 3315, + RFC 6355. + + RequestBroadcast= @@ -846,40 +864,7 @@ - - - - - [DUID] Section Options - - This section configures the DHCP Unique Identifier (DUID) value used by DHCP - protocol. DHCPv6 client protocol sends the DHCP Unique Identifier and the interface - Identity Association Identifier (IAID) to a DHCP server when acquiring a dynamic IPv6 - address. DHCPv4 client protocol sends IAID and DUID to the DHCP server when acquiring - a dynamic IPv4 address if . IAID and DUID allows a - DHCP server to uniquely identify the machine and the interface requesting a DHCP IP. - - The DUID value specified here overrides the DUID that systemd-networkd generates - using the machine-id from the /etc/machine-id file, as well as the - global DUID that may be specified in networkd.conf - 5. - - The configured DHCP DUID should conform to the specification in - RFC 3315, - RFC 6355. - - The following options are available in [DUID] section: - - - - - RawData= - Specifies the DUID bytes as a single newline-terminated, hexadecimal - string, with each byte separated by a ':'. - - - - + [DHCPServer] Section Options diff --git a/src/network/networkd-conf.c b/src/network/networkd-conf.c index 73a8d16b58..70f0121d6d 100644 --- a/src/network/networkd-conf.c +++ b/src/network/networkd-conf.c @@ -31,7 +31,7 @@ int manager_parse_config_file(Manager *m) { return config_parse_many(PKGSYSCONFDIR "/networkd.conf", CONF_PATHS_NULSTR("systemd/networkd.conf.d"), - "DUID\0", + "DHCP\0", config_item_perf_lookup, networkd_gperf_lookup, false, m); } @@ -57,7 +57,8 @@ int config_parse_duid_rawdata( const char *rvalue, void *data, void *userdata) { - int r, n1, n2, byte; + + int r; char *cbyte; const char *pduid = rvalue; Manager *m = userdata; @@ -72,71 +73,78 @@ int config_parse_duid_rawdata( assert(rvalue); assert(userdata); - duidtype = (ltype == DUID_CONFIG_SOURCE_GLOBAL) ? m->duid_type - : n->duid_type; + duidtype = (ltype == DUID_CONFIG_SOURCE_GLOBAL) ? m->duid_type : n->duid_type; if (duidtype == _DUID_TYPE_INVALID) duidtype = DUID_TYPE_RAW; switch (duidtype) { + case DUID_TYPE_LLT: /* RawData contains DUID-LLT link-layer address (offset 6) */ duid_start_offset = 6; break; + case DUID_TYPE_EN: /* RawData contains DUID-EN identifier (offset 4) */ duid_start_offset = 4; break; + case DUID_TYPE_LL: /* RawData contains DUID-LL link-layer address (offset 2) */ duid_start_offset = 2; break; + case DUID_TYPE_UUID: /* RawData specifies UUID (offset 0) - fall thru */ + case DUID_TYPE_RAW: /* First two bytes of RawData is DUID Type - fall thru */ + default: break; } if (duidtype != DUID_TYPE_RAW) - dhcp_duid_type = (uint16_t)duidtype; + dhcp_duid_type = (uint16_t) duidtype; /* RawData contains DUID in format " NN:NN:NN... " */ for (;;) { + int n1, n2; + uint32_t byte; + r = extract_first_word(&pduid, &cbyte, ":", 0); if (r < 0) { - log_syntax(unit, LOG_ERR, filename, line, r, - "Failed to read DUID, ignoring assignment: %s.", rvalue); - goto exit; + log_syntax(unit, LOG_ERR, filename, line, r, "Failed to read DUID, ignoring assignment: %s.", rvalue); + return 0; } if (r == 0) break; - if ((duid_start_offset + dhcp_duid_len) >= MAX_DUID_LEN) { - log_syntax(unit, LOG_ERR, filename, line, 0, - "Max DUID length exceeded, ignoring assignment: %s.", rvalue); - goto exit; + if (duid_start_offset + dhcp_duid_len >= MAX_DUID_LEN) { + log_syntax(unit, LOG_ERR, filename, line, 0, "Max DUID length exceeded, ignoring assignment: %s.", rvalue); + return 0; } len = strlen(cbyte); - if ((len == 0) || (len > 2)) { - log_syntax(unit, LOG_ERR, filename, line, 0, - "Invalid length - DUID byte: %s, ignoring assignment: %s.", cbyte, rvalue); - goto exit; + if (len != 1 && len != 2) { + log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid length - DUID byte: %s, ignoring assignment: %s.", cbyte, rvalue); + return 0; } - n2 = 0; n1 = unhexchar(cbyte[0]); if (len == 2) n2 = unhexchar(cbyte[1]); - if ((n1 < 0) || (n2 < 0)) { - log_syntax(unit, LOG_ERR, filename, line, 0, - "Invalid DUID byte: %s. Ignoring assignment: %s.", cbyte, rvalue); - goto exit; + else + n2 = 0; + + if (n1 < 0 || n2 < 0) { + log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid DUID byte: %s. Ignoring assignment: %s.", cbyte, rvalue); + return 0; } - byte = (n1 << (4 * (len-1))) | n2; + + byte = ((uint8_t) n1 << (4 * (len-1))) | (uint8_t) n2; /* If DUID_TYPE_RAW, first two bytes hold DHCP DUID type code */ - if ((duidtype == DUID_TYPE_RAW) && (count < 2)) { + if (duidtype == DUID_TYPE_RAW && count < 2) { dhcp_duid_type |= (byte << (8 * (1 - count))); count++; continue; @@ -159,6 +167,5 @@ int config_parse_duid_rawdata( memcpy(&n->dhcp_duid[duid_start_offset], dhcp_duid, dhcp_duid_len); } -exit: return 0; } diff --git a/src/network/networkd-gperf.gperf b/src/network/networkd-gperf.gperf index 0625fb335b..afc71b4cb8 100644 --- a/src/network/networkd-gperf.gperf +++ b/src/network/networkd-gperf.gperf @@ -14,5 +14,5 @@ struct ConfigPerfItem; %struct-type %includes %% -DUID.Type, config_parse_duid_type, 0, offsetof(Manager, duid_type) -DUID.RawData, config_parse_duid_rawdata, DUID_CONFIG_SOURCE_GLOBAL, offsetof(Manager, dhcp_duid) +DHCP.DUIDType, config_parse_duid_type, 0, offsetof(Manager, duid_type) +DHCP.DUIDRawData, config_parse_duid_rawdata, DUID_CONFIG_SOURCE_GLOBAL, offsetof(Manager, dhcp_duid) diff --git a/src/network/networkd-network-gperf.gperf b/src/network/networkd-network-gperf.gperf index 1da99cd5bc..654d6a0316 100644 --- a/src/network/networkd-network-gperf.gperf +++ b/src/network/networkd-network-gperf.gperf @@ -28,8 +28,6 @@ Match.Architecture, config_parse_net_condition, Link.MACAddress, config_parse_hwaddr, 0, offsetof(Network, mac) Link.MTUBytes, config_parse_iec_size, 0, offsetof(Network, mtu) Link.IAID, config_parse_iaid, 0, offsetof(Network, iaid) -DUID.Type, config_parse_duid_type, 0, offsetof(Network, duid_type) -DUID.RawData, config_parse_duid_rawdata, DUID_CONFIG_SOURCE_NETWORK, offsetof(Network, dhcp_duid) Network.Description, config_parse_string, 0, offsetof(Network, description) Network.Bridge, config_parse_netdev, 0, offsetof(Network, bridge) Network.Bond, config_parse_netdev, 0, offsetof(Network, bond) @@ -85,6 +83,8 @@ DHCP.Hostname, config_parse_hostname, DHCP.RequestBroadcast, config_parse_bool, 0, offsetof(Network, dhcp_broadcast) DHCP.CriticalConnection, config_parse_bool, 0, offsetof(Network, dhcp_critical) DHCP.VendorClassIdentifier, config_parse_string, 0, offsetof(Network, dhcp_vendor_class_identifier) +DHCP.DUIDType, config_parse_duid_type, 0, offsetof(Network, duid_type) +DHCP.DUIDRawData, config_parse_duid_rawdata, DUID_CONFIG_SOURCE_NETWORK, offsetof(Network, dhcp_duid) DHCP.RouteMetric, config_parse_unsigned, 0, offsetof(Network, dhcp_route_metric) DHCP.UseTimezone, config_parse_bool, 0, offsetof(Network, dhcp_use_timezone) DHCPServer.MaxLeaseTimeSec, config_parse_sec, 0, offsetof(Network, dhcp_server_max_lease_time_usec) diff --git a/src/network/networkd-network.c b/src/network/networkd-network.c index 07f8fb028f..2ebcdfa744 100644 --- a/src/network/networkd-network.c +++ b/src/network/networkd-network.c @@ -137,7 +137,6 @@ static int network_load_one(Manager *manager, const char *filename) { r = config_parse(NULL, filename, file, "Match\0" "Link\0" - "DUID\0" "Network\0" "Address\0" "Route\0" -- cgit v1.2.3-54-g00ecf From 1fcefd8815455e416c1eda3c8c1220831a2f82e9 Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Fri, 29 Apr 2016 12:21:52 +0200 Subject: journal-file: when rotating a journal file, fsync directory too As suggested by: https://github.com/systemd/systemd/pull/3126#discussion_r61125474 --- src/journal/journal-file.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'src') diff --git a/src/journal/journal-file.c b/src/journal/journal-file.c index a58079bdd1..c9ce5c73be 100644 --- a/src/journal/journal-file.c +++ b/src/journal/journal-file.c @@ -3213,6 +3213,9 @@ int journal_file_rotate(JournalFile **f, bool compress, bool seal, Set *deferred if (r < 0 && errno != ENOENT) return -errno; + /* Sync the rename to disk */ + (void) fsync_directory_of_file(old_file->fd); + /* Set as archive so offlining commits w/state=STATE_ARCHIVED. * Previously we would set old_file->header->state to STATE_ARCHIVED directly here, * but journal_file_set_offline() short-circuits when state != STATE_ONLINE, which -- cgit v1.2.3-54-g00ecf