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Diffstat (limited to 'src/journal/journald-server.h')
| -rw-r--r-- | src/journal/journald-server.h | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/src/journal/journald-server.h b/src/journal/journald-server.h new file mode 100644 index 0000000..ee8f374 --- /dev/null +++ b/src/journal/journald-server.h @@ -0,0 +1,229 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ +#pragma once + +#include <stdbool.h> +#include <sys/types.h> + +#include "sd-event.h" + +typedef struct Server Server; + +#include "conf-parser.h" +#include "hashmap.h" +#include "journald-context.h" +#include "journald-rate-limit.h" +#include "journald-stream.h" +#include "list.h" +#include "managed-journal-file.h" +#include "prioq.h" +#include "ratelimit.h" +#include "time-util.h" +#include "varlink.h" + +typedef enum Storage { + STORAGE_AUTO, + STORAGE_VOLATILE, + STORAGE_PERSISTENT, + STORAGE_NONE, + _STORAGE_MAX, + _STORAGE_INVALID = -EINVAL, +} Storage; + +typedef enum SplitMode { + SPLIT_UID, + SPLIT_LOGIN, /* deprecated */ + SPLIT_NONE, + _SPLIT_MAX, + _SPLIT_INVALID = -EINVAL, +} SplitMode; + +typedef struct JournalCompressOptions { + bool enabled; + uint64_t threshold_bytes; +} JournalCompressOptions; + +typedef struct JournalStorageSpace { + usec_t timestamp; + + uint64_t available; + uint64_t limit; + + uint64_t vfs_used; /* space used by journal files */ + uint64_t vfs_available; +} JournalStorageSpace; + +typedef struct JournalStorage { + const char *name; + char *path; + + JournalMetrics metrics; + JournalStorageSpace space; +} JournalStorage; + +struct Server { + char *namespace; + + int syslog_fd; + int native_fd; + int stdout_fd; + int dev_kmsg_fd; + int audit_fd; + int hostname_fd; + int notify_fd; + + sd_event *event; + + sd_event_source *syslog_event_source; + sd_event_source *native_event_source; + sd_event_source *stdout_event_source; + sd_event_source *dev_kmsg_event_source; + sd_event_source *audit_event_source; + sd_event_source *sync_event_source; + sd_event_source *sigusr1_event_source; + sd_event_source *sigusr2_event_source; + sd_event_source *sigterm_event_source; + sd_event_source *sigint_event_source; + sd_event_source *sigrtmin1_event_source; + sd_event_source *hostname_event_source; + sd_event_source *notify_event_source; + sd_event_source *watchdog_event_source; + sd_event_source *idle_event_source; + + ManagedJournalFile *runtime_journal; + ManagedJournalFile *system_journal; + OrderedHashmap *user_journals; + + uint64_t seqnum; + + char *buffer; + + JournalRateLimit *ratelimit; + usec_t sync_interval_usec; + usec_t ratelimit_interval; + unsigned ratelimit_burst; + + JournalStorage runtime_storage; + JournalStorage system_storage; + + JournalCompressOptions compress; + bool seal; + bool read_kmsg; + int set_audit; + + bool forward_to_kmsg; + bool forward_to_syslog; + bool forward_to_console; + bool forward_to_wall; + + unsigned n_forward_syslog_missed; + usec_t last_warn_forward_syslog_missed; + + usec_t max_retention_usec; + usec_t max_file_usec; + usec_t oldest_file_usec; + + LIST_HEAD(StdoutStream, stdout_streams); + LIST_HEAD(StdoutStream, stdout_streams_notify_queue); + unsigned n_stdout_streams; + + char *tty_path; + + int max_level_store; + int max_level_syslog; + int max_level_kmsg; + int max_level_console; + int max_level_wall; + + Storage storage; + SplitMode split_mode; + + MMapCache *mmap; + + Set *deferred_closes; + + uint64_t *kernel_seqnum; + bool dev_kmsg_readable:1; + RateLimit kmsg_own_ratelimit; + + bool send_watchdog:1; + bool sent_notify_ready:1; + bool sync_scheduled:1; + + char machine_id_field[sizeof("_MACHINE_ID=") + 32]; + char boot_id_field[sizeof("_BOOT_ID=") + 32]; + char *hostname_field; + char *namespace_field; + char *runtime_directory; + + /* Cached cgroup root, so that we don't have to query that all the time */ + char *cgroup_root; + + usec_t watchdog_usec; + + usec_t last_realtime_clock; + + size_t line_max; + + /* Caching of client metadata */ + Hashmap *client_contexts; + Prioq *client_contexts_lru; + + usec_t last_cache_pid_flush; + + ClientContext *my_context; /* the context of journald itself */ + ClientContext *pid1_context; /* the context of PID 1 */ + + VarlinkServer *varlink_server; +}; + +#define SERVER_MACHINE_ID(s) ((s)->machine_id_field + STRLEN("_MACHINE_ID=")) + +/* Extra fields for any log messages */ +#define N_IOVEC_META_FIELDS 24 + +/* Extra fields for log messages that contain OBJECT_PID= (i.e. log about another process) */ +#define N_IOVEC_OBJECT_FIELDS 18 + +/* Maximum number of fields we'll add in for driver (i.e. internal) messages */ +#define N_IOVEC_PAYLOAD_FIELDS 16 + +/* kmsg: Maximum number of extra fields we'll import from the kernel's /dev/kmsg */ +#define N_IOVEC_KERNEL_FIELDS 64 + +/* kmsg: Maximum number of extra fields we'll import from udev's devices */ +#define N_IOVEC_UDEV_FIELDS 32 + +/* audit: Maximum number of extra fields we'll import from audit messages */ +#define N_IOVEC_AUDIT_FIELDS 64 + +void server_dispatch_message(Server *s, struct iovec *iovec, size_t n, size_t m, ClientContext *c, const struct timeval *tv, int priority, pid_t object_pid); +void server_driver_message(Server *s, pid_t object_pid, const char *message_id, const char *format, ...) _sentinel_ _printf_(4,0); + +/* gperf lookup function */ +const struct ConfigPerfItem* journald_gperf_lookup(const char *key, GPERF_LEN_TYPE length); + +CONFIG_PARSER_PROTOTYPE(config_parse_storage); +CONFIG_PARSER_PROTOTYPE(config_parse_line_max); +CONFIG_PARSER_PROTOTYPE(config_parse_compress); + +const char *storage_to_string(Storage s) _const_; +Storage storage_from_string(const char *s) _pure_; + +CONFIG_PARSER_PROTOTYPE(config_parse_split_mode); + +const char *split_mode_to_string(SplitMode s) _const_; +SplitMode split_mode_from_string(const char *s) _pure_; + +int server_init(Server *s, const char *namespace); +void server_done(Server *s); +void server_sync(Server *s); +void server_vacuum(Server *s, bool verbose); +void server_rotate(Server *s); +int server_schedule_sync(Server *s, int priority); +int server_flush_to_var(Server *s, bool require_flag_file); +void server_maybe_append_tags(Server *s); +int server_process_datagram(sd_event_source *es, int fd, uint32_t revents, void *userdata); +void server_space_usage_message(Server *s, JournalStorage *storage); + +int server_start_or_stop_idle_timer(Server *s); +int server_refresh_idle_timer(Server *s); |