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moonfire-nvr/server/db/db.rs

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// This file is part of Moonfire NVR, a security camera network video recorder.
// Copyright (C) 2021 The Moonfire NVR Authors; see AUTHORS and LICENSE.txt.
// SPDX-License-Identifier: GPL-v3.0-or-later WITH GPL-3.0-linking-exception.
//! Database access logic for the Moonfire NVR SQLite schema.
//!
//! The SQLite schema includes everything except the actual video samples (see the `dir` module
//! for management of those). See `schema.sql` for a more detailed description.
//!
//! The [`Database`] struct caches data in RAM, making the assumption that only one process is
//! accessing the database at a time. Performance and efficiency notes:
//!
//! * several query operations here feature row callbacks. The callback is invoked with
//! the database lock. Thus, the callback shouldn't perform long-running operations.
//!
//! * startup may be slow, as it scans the entire index for the recording table. This seems
//! acceptable.
//!
//! * the operations used for web file serving should return results with acceptable latency.
//!
//! * however, the database lock may be held for longer than is acceptable for
//! the critical path of recording frames. The caller should preallocate sample file uuids
//! and such to avoid database operations in these paths.
//!
//! * adding and removing recordings done during normal operations use a batch interface.
//! A list of mutations is built up in-memory and occasionally flushed to reduce SSD write
//! cycles.
use crate::auth;
use crate::days;
use crate::dir;
use crate::json::SampleFileDirConfig;
use crate::raw;
use crate::recording;
use crate::schema;
use crate::signal;
use base::clock::{self, Clocks};
use base::strutil::encode_size;
use base::{bail, err, Error};
// use failure::{bail, err, Error, ResultExt};
use fnv::{FnvHashMap, FnvHashSet};
use hashlink::LinkedHashMap;
use itertools::Itertools;
use rusqlite::{named_params, params};
use smallvec::SmallVec;
use std::cell::RefCell;
use std::cmp;
use std::collections::{BTreeMap, VecDeque};
use std::fmt::Write as _;
use std::mem;
use std::ops::Range;
use std::path::PathBuf;
use std::str;
use std::string::String;
use std::sync::Arc;
use std::sync::{Mutex, MutexGuard};
use std::vec::Vec;
use tracing::warn;
use tracing::{error, info, trace};
use uuid::Uuid;
/// Expected schema version. See `guide/schema.md` for more information.
pub const EXPECTED_SCHEMA_VERSION: i32 = 7;
/// Length of the video index cache.
/// The actual data structure is one bigger than this because we insert before we remove.
/// Make it one less than a power of two so that the data structure's size is efficient.
const VIDEO_INDEX_CACHE_LEN: usize = 1023;
const GET_RECORDING_PLAYBACK_SQL: &str = r#"
select
video_index
from
recording_playback
where
composite_id = :composite_id
"#;
const INSERT_VIDEO_SAMPLE_ENTRY_SQL: &str = r#"
insert into video_sample_entry (width, height, pasp_h_spacing, pasp_v_spacing,
rfc6381_codec, data)
values (:width, :height, :pasp_h_spacing, :pasp_v_spacing,
:rfc6381_codec, :data)
"#;
const UPDATE_STREAM_COUNTERS_SQL: &str = r#"
update stream
set cum_recordings = :cum_recordings,
cum_media_duration_90k = :cum_media_duration_90k,
cum_runs = :cum_runs
where id = :stream_id
"#;
/// The size of a filesystem block, to use in disk space accounting.
/// This should really be obtained by a stat call on the sample file directory in question,
/// but that requires some refactoring. See
/// [#89](https://github.com/scottlamb/moonfire-nvr/issues/89). We might be able to get away with
/// this hardcoded value for a while.
const ASSUMED_BLOCK_SIZE_BYTES: i64 = 4096;
/// Rounds a file size up to the next multiple of the block size.
/// This is useful in representing the actual amount of filesystem space used.
pub(crate) fn round_up(bytes: i64) -> i64 {
let blk = ASSUMED_BLOCK_SIZE_BYTES;
(bytes + blk - 1) / blk * blk
}
/// A wrapper around `Uuid` which implements `FromSql` and `ToSql`.
pub struct SqlUuid(pub Uuid);
impl rusqlite::types::FromSql for SqlUuid {
fn column_result(value: rusqlite::types::ValueRef) -> rusqlite::types::FromSqlResult<Self> {
let uuid = Uuid::from_slice(value.as_blob()?)
.map_err(|e| rusqlite::types::FromSqlError::Other(Box::new(e)))?;
Ok(SqlUuid(uuid))
}
}
impl rusqlite::types::ToSql for SqlUuid {
fn to_sql(&self) -> rusqlite::Result<rusqlite::types::ToSqlOutput<'_>> {
Ok(self.0.as_bytes()[..].into())
}
}
struct VideoIndex(Box<[u8]>);
impl rusqlite::types::FromSql for VideoIndex {
fn column_result(value: rusqlite::types::ValueRef) -> rusqlite::types::FromSqlResult<Self> {
Ok(VideoIndex(value.as_blob()?.to_vec().into_boxed_slice()))
}
}
/// A concrete box derived from a ISO/IEC 14496-12 section 8.5.2 VisualSampleEntry box. Describes
/// the codec, width, height, etc.
#[derive(Debug)]
pub struct VideoSampleEntry {
pub id: i32,
// Fields matching VideoSampleEntryToInsert below.
pub data: Vec<u8>,
pub rfc6381_codec: String,
pub width: u16,
pub height: u16,
pub pasp_h_spacing: u16,
pub pasp_v_spacing: u16,
}
impl VideoSampleEntry {
/// Returns the aspect ratio as a minimized ratio.
pub fn aspect(&self) -> num_rational::Ratio<u32> {
num_rational::Ratio::new(
u32::from(self.width) * u32::from(self.pasp_h_spacing),
u32::from(self.height) * u32::from(self.pasp_v_spacing),
)
}
}
#[derive(Clone, PartialEq, Eq)]
pub struct VideoSampleEntryToInsert {
pub data: Vec<u8>,
pub rfc6381_codec: String,
pub width: u16,
pub height: u16,
pub pasp_h_spacing: u16,
pub pasp_v_spacing: u16,
}
impl std::fmt::Debug for VideoSampleEntryToInsert {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
use pretty_hex::PrettyHex;
f.debug_struct("VideoSampleEntryToInsert")
.field("data", &self.data.hex_dump())
.field("rfc6381_codec", &self.rfc6381_codec)
.field("width", &self.width)
.field("height", &self.height)
.field("pasp_h_spacing", &self.pasp_h_spacing)
.field("pasp_v_spacing", &self.pasp_v_spacing)
.finish()
}
}
/// A row used in `list_recordings_by_time` and `list_recordings_by_id`.
#[derive(Copy, Clone, Debug)]
pub struct ListRecordingsRow {
pub start: recording::Time,
pub video_sample_entry_id: i32,
pub id: CompositeId,
/// This is a recording::Duration, but a single recording's duration fits into an i32.
pub wall_duration_90k: i32,
pub media_duration_90k: i32,
pub video_samples: i32,
pub video_sync_samples: i32,
pub sample_file_bytes: i32,
pub run_offset: i32,
pub open_id: u32,
pub flags: i32,
/// This is populated by `list_recordings_by_id` but not `list_recordings_by_time`.
/// (It's not included in the `recording_cover` index, so adding it to
/// `list_recordings_by_time` would be inefficient.)
pub prev_media_duration_and_runs: Option<(recording::Duration, i32)>,
}
/// A row used in `list_aggregated_recordings`.
#[derive(Clone, Debug)]
pub struct ListAggregatedRecordingsRow {
pub time: Range<recording::Time>,
pub ids: Range<i32>,
pub video_samples: i64,
pub video_sync_samples: i64,
pub sample_file_bytes: i64,
pub video_sample_entry_id: i32,
pub stream_id: i32,
pub run_start_id: i32,
pub open_id: u32,
pub first_uncommitted: Option<i32>,
pub growing: bool,
pub has_trailing_zero: bool,
}
impl ListAggregatedRecordingsRow {
fn from(row: ListRecordingsRow) -> Self {
let recording_id = row.id.recording();
let uncommitted = (row.flags & RecordingFlags::Uncommitted as i32) != 0;
let growing = (row.flags & RecordingFlags::Growing as i32) != 0;
ListAggregatedRecordingsRow {
time: row.start..recording::Time(row.start.0 + row.wall_duration_90k as i64),
ids: recording_id..recording_id + 1,
video_samples: row.video_samples as i64,
video_sync_samples: row.video_sync_samples as i64,
sample_file_bytes: row.sample_file_bytes as i64,
video_sample_entry_id: row.video_sample_entry_id,
stream_id: row.id.stream(),
run_start_id: recording_id - row.run_offset,
open_id: row.open_id,
first_uncommitted: if uncommitted {
Some(recording_id)
} else {
None
},
growing,
has_trailing_zero: (row.flags & RecordingFlags::TrailingZero as i32) != 0,
}
}
}
/// Select fields from the `recordings_playback` table. Retrieve with `with_recording_playback`.
#[derive(Debug)]
pub struct RecordingPlayback<'a> {
pub video_index: &'a [u8],
}
/// Bitmask in the `flags` field in the `recordings` table; see `schema.sql`.
#[repr(u32)]
pub enum RecordingFlags {
TrailingZero = 1,
// These values (starting from high bit on down) are never written to the database.
Growing = 1 << 30,
Uncommitted = 1 << 31,
}
/// A recording to pass to `LockedDatabase::add_recording` and `raw::insert_recording`.
#[derive(Clone, Debug, Default)]
pub struct RecordingToInsert {
pub run_offset: i32,
pub flags: i32,
pub sample_file_bytes: i32,
pub start: recording::Time,
/// Filled in by `add_recording`.
pub prev_media_duration: recording::Duration,
/// Filled in by `add_recording`.
pub prev_runs: i32,
pub wall_duration_90k: i32, // a recording::Duration, but guaranteed to fit in i32.
pub media_duration_90k: i32,
pub local_time_delta: recording::Duration,
pub video_samples: i32,
pub video_sync_samples: i32,
pub video_sample_entry_id: i32,
pub video_index: Vec<u8>,
pub sample_file_blake3: Option<[u8; 32]>,
pub end_reason: Option<String>,
}
impl RecordingToInsert {
fn to_list_row(&self, id: CompositeId, open_id: u32) -> ListRecordingsRow {
ListRecordingsRow {
start: self.start,
video_sample_entry_id: self.video_sample_entry_id,
id,
wall_duration_90k: self.wall_duration_90k,
media_duration_90k: self.media_duration_90k,
video_samples: self.video_samples,
video_sync_samples: self.video_sync_samples,
sample_file_bytes: self.sample_file_bytes,
run_offset: self.run_offset,
open_id,
flags: self.flags | RecordingFlags::Uncommitted as i32,
prev_media_duration_and_runs: Some((self.prev_media_duration, self.prev_runs)),
}
}
}
/// A row used in `raw::list_oldest_recordings` and `db::delete_oldest_recordings`.
#[derive(Copy, Clone, Debug)]
pub(crate) struct ListOldestRecordingsRow {
pub id: CompositeId,
pub start: recording::Time,
pub wall_duration_90k: i32,
pub sample_file_bytes: i32,
}
#[derive(Debug)]
pub struct SampleFileDir {
pub id: i32,
pub path: PathBuf,
pub uuid: Uuid,
dir: Option<Arc<dir::SampleFileDir>>,
last_complete_open: Option<Open>,
/// ids which are in the `garbage` database table (rather than `recording`) as of last commit
/// but may still exist on disk. These can't be safely removed from the database yet.
pub(crate) garbage_needs_unlink: FnvHashSet<CompositeId>,
/// ids which are in the `garbage` database table and are guaranteed to no longer exist on
/// disk (have been unlinked and the dir has been synced). These may be removed from the
/// database on next flush. Mutually exclusive with `garbage_needs_unlink`.
pub(crate) garbage_unlinked: Vec<CompositeId>,
}
impl SampleFileDir {
/// Returns a cloned copy of the directory, or Err if closed.
///
/// Use `LockedDatabase::open_sample_file_dirs` prior to calling this method.
pub fn get(&self) -> Result<Arc<dir::SampleFileDir>, base::Error> {
Ok(self
.dir
.as_ref()
.ok_or_else(|| {
err!(
FailedPrecondition,
msg("sample file dir {} is closed", self.id)
)
})?
.clone())
}
/// Returns expected existing metadata when opening this directory.
fn expected_meta(&self, db_uuid: &Uuid) -> schema::DirMeta {
let mut meta = schema::DirMeta::default();
meta.db_uuid.extend_from_slice(&db_uuid.as_bytes()[..]);
meta.dir_uuid.extend_from_slice(&self.uuid.as_bytes()[..]);
if let Some(o) = self.last_complete_open {
let open = meta.last_complete_open.mut_or_insert_default();
open.id = o.id;
open.uuid.extend_from_slice(&o.uuid.as_bytes()[..]);
}
meta
}
}
pub use crate::auth::RawSessionId;
pub use crate::auth::Request;
pub use crate::auth::Session;
pub use crate::auth::User;
pub use crate::auth::UserChange;
/// In-memory state about a camera.
#[derive(Debug)]
pub struct Camera {
pub id: i32,
pub uuid: Uuid,
pub short_name: String,
pub config: crate::json::CameraConfig,
pub streams: [Option<i32>; NUM_STREAM_TYPES],
}
#[derive(Copy, Clone, Debug, Eq, PartialEq)]
pub enum StreamType {
Main,
Sub,
Ext,
}
pub const NUM_STREAM_TYPES: usize = 3;
impl StreamType {
pub fn from_index(i: usize) -> Option<Self> {
match i {
0 => Some(StreamType::Main),
1 => Some(StreamType::Sub),
2 => Some(StreamType::Ext),
_ => None,
}
}
pub fn index(self) -> usize {
match self {
StreamType::Main => 0,
StreamType::Sub => 1,
StreamType::Ext => 2,
}
}
pub fn as_str(self) -> &'static str {
match self {
StreamType::Main => "main",
StreamType::Sub => "sub",
StreamType::Ext => "ext",
}
}
pub fn parse(type_: &str) -> Option<Self> {
match type_ {
"main" => Some(StreamType::Main),
"sub" => Some(StreamType::Sub),
"ext" => Some(StreamType::Ext),
_ => None,
}
}
}
impl ::std::fmt::Display for StreamType {
fn fmt(&self, f: &mut ::std::fmt::Formatter) -> Result<(), ::std::fmt::Error> {
f.write_str(self.as_str())
}
}
pub const ALL_STREAM_TYPES: [StreamType; NUM_STREAM_TYPES] =
[StreamType::Main, StreamType::Sub, StreamType::Ext];
pub struct Stream {
pub id: i32,
pub camera_id: i32,
pub sample_file_dir_id: Option<i32>,
pub type_: StreamType,
pub config: crate::json::StreamConfig,
/// The time range of recorded data associated with this stream (minimum start time and maximum
/// end time). `None` iff there are no recordings for this camera.
pub range: Option<Range<recording::Time>>,
/// The total bytes of flushed sample files. This doesn't include disk space wasted in the
/// last filesystem block allocated to each file ("internal fragmentation").
pub sample_file_bytes: i64,
/// The total bytes on the filesystem used by this stream. This slightly more than
/// `sample_file_bytes` because it includes the wasted space in the last filesystem block.
pub fs_bytes: i64,
/// On flush, delete the following recordings (move them to the `garbage` table, to be
/// collected later). Note they must be the oldest recordings. The later collection involves
/// the syncer unlinking the files on disk and syncing the directory then enqueueing for
/// another following flush removal from the `garbage` table.
to_delete: Vec<ListOldestRecordingsRow>,
/// The total bytes to delete with the next flush.
pub bytes_to_delete: i64,
pub fs_bytes_to_delete: i64,
/// The total bytes to add with the next flush. (`mark_synced` has already been called on these
/// recordings.)
pub bytes_to_add: i64,
pub fs_bytes_to_add: i64,
/// The total duration of undeleted recorded data. This may not be `range.end - range.start`
/// due to gaps and overlap.
pub duration: recording::Duration,
/// Mapping of calendar day (in the server's time zone) to a summary of committed recordings on
/// that day.
pub committed_days: days::Map<days::StreamValue>,
/// The `cum_recordings` currently committed to the database.
pub(crate) cum_recordings: i32,
/// The `cum_media_duration_90k` currently committed to the database.
cum_media_duration: recording::Duration,
/// The `cum_runs` currently committed to the database.
cum_runs: i32,
/// The recordings which have been added via `LockedDatabase::add_recording` but have yet to
/// committed to the database.
///
/// `uncommitted[i]` uses sample filename `CompositeId::new(id, cum_recordings + i)`;
/// `cum_recordings` should be advanced when one is committed to maintain this invariant.
///
/// TODO: alter the serving path to show these just as if they were already committed.
uncommitted: VecDeque<Arc<Mutex<RecordingToInsert>>>,
/// The number of recordings in `uncommitted` which are synced and ready to commit.
synced_recordings: usize,
on_live_segment: Vec<Box<dyn FnMut(LiveSegment) -> bool + Send>>,
}
/// Bounds of a live view segment. Currently this is a single frame of video.
/// This is used for live stream recordings. The stream id should already be known to the
/// subscriber. Note this doesn't actually contain the video, just a reference that can be
/// looked up within the database.
#[derive(Clone, Debug)]
pub struct LiveSegment {
pub recording: i32,
/// If the segment's one frame is a key frame.
pub is_key: bool,
/// The pts, relative to the start of the recording, of the start and end of this live segment,
/// in 90kHz units.
pub media_off_90k: Range<i32>,
}
#[derive(Clone, Debug, Default)]
pub struct StreamChange {
pub sample_file_dir_id: Option<i32>,
pub config: crate::json::StreamConfig,
}
/// Information about a camera, used by `add_camera` and `update_camera`.
#[derive(Clone, Debug, Default)]
pub struct CameraChange {
pub short_name: String,
pub config: crate::json::CameraConfig,
/// `StreamType t` is represented by `streams[t.index()]`. A default StreamChange will
/// correspond to no stream in the database, provided there are no existing recordings for that
/// stream.
pub streams: [StreamChange; NUM_STREAM_TYPES],
}
impl Stream {
/// Adds a single fully committed recording with the given properties to the in-memory state.
fn add_recording(&mut self, r: Range<recording::Time>, sample_file_bytes: i32) {
self.range = Some(match self.range {
Some(ref e) => cmp::min(e.start, r.start)..cmp::max(e.end, r.end),
None => r.start..r.end,
});
self.duration += r.end - r.start;
self.sample_file_bytes += i64::from(sample_file_bytes);
self.fs_bytes += round_up(i64::from(sample_file_bytes));
self.committed_days.adjust(r, 1);
}
/// Returns a days map including unflushed recordings.
pub fn days(&self) -> days::Map<days::StreamValue> {
let mut days = self.committed_days.clone();
for u in &self.uncommitted {
let l = u.lock().unwrap();
days.adjust(
l.start..l.start + recording::Duration(i64::from(l.wall_duration_90k)),
1,
);
}
days
}
}
/// Initializes the recordings associated with the given camera.
fn init_recordings(
conn: &mut rusqlite::Connection,
stream_id: i32,
camera: &Camera,
stream: &mut Stream,
) -> Result<(), Error> {
info!(
"Loading recordings for camera {} stream {:?}",
camera.short_name, stream.type_
);
let mut stmt = conn.prepare(
r#"
select
recording.start_time_90k,
recording.wall_duration_90k,
recording.sample_file_bytes
from
recording
where
stream_id = :stream_id
"#,
)?;
let mut rows = stmt.query(named_params! {":stream_id": stream_id})?;
let mut i = 0;
while let Some(row) = rows.next()? {
let start = recording::Time(row.get(0)?);
let duration = recording::Duration(row.get(1)?);
let bytes = row.get(2)?;
stream.add_recording(start..start + duration, bytes);
i += 1;
}
info!(
"Loaded {} recordings for camera {} stream {:?}",
i, camera.short_name, stream.type_
);
Ok(())
}
pub struct LockedDatabase {
conn: rusqlite::Connection,
uuid: Uuid,
flush_count: usize,
/// If the database is open in read-write mode, the information about the current Open row.
pub open: Option<Open>,
/// The monotonic time when the database was opened (whether in read-write mode or read-only
/// mode).
open_monotonic: recording::Time,
auth: auth::State,
signal: signal::State,
sample_file_dirs_by_id: BTreeMap<i32, SampleFileDir>,
cameras_by_id: BTreeMap<i32, Camera>,
streams_by_id: BTreeMap<i32, Stream>,
cameras_by_uuid: BTreeMap<Uuid, i32>, // values are ids.
video_sample_entries_by_id: BTreeMap<i32, Arc<VideoSampleEntry>>,
video_index_cache: RefCell<LinkedHashMap<i64, Box<[u8]>, fnv::FnvBuildHasher>>,
on_flush: Vec<Box<dyn Fn() + Send>>,
}
/// Represents a row of the `open` database table.
#[derive(Copy, Clone, Debug)]
pub struct Open {
pub id: u32,
pub(crate) uuid: Uuid,
}
/// A combination of a stream id and recording id into a single 64-bit int.
/// This is used as a primary key in the SQLite `recording` table (see `schema.sql`)
/// and the sample file's name on disk (see `dir.rs`).
#[derive(Copy, Clone, Debug, Eq, Hash, PartialEq)]
pub struct CompositeId(pub i64);
impl CompositeId {
pub fn new(stream_id: i32, recording_id: i32) -> Self {
CompositeId((stream_id as i64) << 32 | recording_id as i64)
}
pub fn stream(self) -> i32 {
(self.0 >> 32) as i32
}
pub fn recording(self) -> i32 {
self.0 as i32
}
}
impl ::std::fmt::Display for CompositeId {
fn fmt(&self, f: &mut ::std::fmt::Formatter) -> Result<(), ::std::fmt::Error> {
write!(f, "{}/{}", self.stream(), self.recording())
}
}
/// Inserts, updates, or removes streams in the `State` object to match a set of `StreamChange`
/// structs.
struct StreamStateChanger {
sids: [Option<i32>; NUM_STREAM_TYPES],
/// For each stream to change, a (stream_id, upsert or `None` to delete) tuple.
streams: Vec<(i32, Option<StreamStateChangerUpsert>)>,
}
/// Upsert state used internally within [`StreamStateChanger`].
struct StreamStateChangerUpsert {
camera_id: i32,
type_: StreamType,
sc: StreamChange,
}
impl StreamStateChanger {
/// Performs the database updates (guarded by the given transaction) and returns the state
/// change to be applied on successful commit.
fn new(
tx: &rusqlite::Transaction,
camera_id: i32,
existing: Option<&Camera>,
streams_by_id: &BTreeMap<i32, Stream>,
change: &mut CameraChange,
) -> Result<Self, Error> {
let mut sids = [None; NUM_STREAM_TYPES];
let mut streams = Vec::with_capacity(NUM_STREAM_TYPES);
let existing_streams = existing.map(|e| e.streams).unwrap_or_default();
for (i, ref mut sc) in change.streams.iter_mut().enumerate() {
let type_ = StreamType::from_index(i).unwrap();
let mut have_data = false;
if let Some(sid) = existing_streams[i] {
let s = streams_by_id.get(&sid).unwrap();
if s.range.is_some() {
have_data = true;
if let (Some(d), false) = (
s.sample_file_dir_id,
s.sample_file_dir_id == sc.sample_file_dir_id,
) {
bail!(
FailedPrecondition,
msg(
"can't change sample_file_dir_id {:?}->{:?} for non-empty stream {}",
d,
sc.sample_file_dir_id,
sid,
),
);
}
}
if !have_data && sc.config.is_empty() && sc.sample_file_dir_id.is_none() {
// Delete stream.
let mut stmt = tx.prepare_cached(
r#"
delete from stream where id = ?
"#,
)?;
if stmt.execute(params![sid])? != 1 {
bail!(Internal, msg("missing stream {sid}"));
}
streams.push((sid, None));
} else {
// Update stream.
let mut stmt = tx.prepare_cached(
r#"
update stream set
config = :config,
sample_file_dir_id = :sample_file_dir_id
where
id = :id
"#,
)?;
let rows = stmt.execute(named_params! {
":config": &sc.config,
":sample_file_dir_id": sc.sample_file_dir_id,
":id": sid,
})?;
if rows != 1 {
bail!(Internal, msg("missing stream {sid}"));
}
sids[i] = Some(sid);
streams.push((
sid,
Some(StreamStateChangerUpsert {
camera_id,
type_,
sc: mem::take(*sc),
}),
));
}
} else {
if sc.config.is_empty() && sc.sample_file_dir_id.is_none() {
// Do nothing; there is no record and we want to keep it that way.
continue;
}
// Insert stream.
let mut stmt = tx.prepare_cached(
r#"
insert into stream (camera_id, sample_file_dir_id, type, config,
cum_recordings, cum_media_duration_90k, cum_runs)
values (:camera_id, :sample_file_dir_id, :type, :config,
0, 0, 0)
"#,
)?;
stmt.execute(named_params! {
":camera_id": camera_id,
":sample_file_dir_id": sc.sample_file_dir_id,
":type": type_.as_str(),
":config": &sc.config,
})?;
let id = tx.last_insert_rowid() as i32;
sids[i] = Some(id);
streams.push((
id,
Some(StreamStateChangerUpsert {
camera_id,
type_,
sc: mem::take(*sc),
}),
));
}
}
Ok(StreamStateChanger { sids, streams })
}
/// Applies the change to the given `streams_by_id`. The caller is expected to set
/// `Camera::streams` to the return value.
fn apply(
mut self,
streams_by_id: &mut BTreeMap<i32, Stream>,
) -> [Option<i32>; NUM_STREAM_TYPES] {
for (id, stream) in self.streams.drain(..) {
use ::std::collections::btree_map::Entry;
match (streams_by_id.entry(id), stream) {
(
Entry::Vacant(e),
Some(StreamStateChangerUpsert {
camera_id,
type_,
sc,
}),
) => {
e.insert(Stream {
id,
type_,
camera_id,
sample_file_dir_id: sc.sample_file_dir_id,
config: sc.config,
range: None,
sample_file_bytes: 0,
fs_bytes: 0,
to_delete: Vec::new(),
bytes_to_delete: 0,
fs_bytes_to_delete: 0,
bytes_to_add: 0,
fs_bytes_to_add: 0,
duration: recording::Duration(0),
committed_days: days::Map::default(),
cum_recordings: 0,
cum_media_duration: recording::Duration(0),
cum_runs: 0,
uncommitted: VecDeque::new(),
synced_recordings: 0,
on_live_segment: Vec::new(),
});
}
(Entry::Vacant(_), None) => {}
(Entry::Occupied(e), Some(StreamStateChangerUpsert { sc, .. })) => {
let e = e.into_mut();
e.sample_file_dir_id = sc.sample_file_dir_id;
e.config = sc.config;
}
(Entry::Occupied(e), None) => {
e.remove();
}
};
}
self.sids
}
}
/// A retention change as expected by `LockedDatabase::update_retention`.
pub struct RetentionChange {
pub stream_id: i32,
pub new_record: bool,
pub new_limit: i64,
}
impl LockedDatabase {
/// Returns an immutable view of the cameras by id.
pub fn cameras_by_id(&self) -> &BTreeMap<i32, Camera> {
&self.cameras_by_id
}
pub fn sample_file_dirs_by_id(&self) -> &BTreeMap<i32, SampleFileDir> {
&self.sample_file_dirs_by_id
}
/// Returns the number of completed database flushes since startup.
pub fn flushes(&self) -> usize {
self.flush_count
}
/// Adds a placeholder for an uncommitted recording.
///
/// The caller should write samples and fill the returned `RecordingToInsert` as it goes
/// (noting that while holding the lock, it should not perform I/O or acquire the database
/// lock). Then it should sync to permanent storage and call `mark_synced`. The data will
/// be written to the database on the next `flush`.
///
/// A call to `add_recording` is also a promise that previous recordings (even if not yet
/// synced and committed) won't change.
///
/// This fills the `prev_media_duration` and `prev_runs` fields.
pub(crate) fn add_recording(
&mut self,
stream_id: i32,
mut r: RecordingToInsert,
) -> Result<(CompositeId, Arc<Mutex<RecordingToInsert>>), Error> {
let stream = match self.streams_by_id.get_mut(&stream_id) {
None => bail!(FailedPrecondition, msg("no such stream {stream_id}")),
Some(s) => s,
};
let id = CompositeId::new(
stream_id,
stream.cum_recordings + (stream.uncommitted.len() as i32),
);
match stream.uncommitted.back() {
Some(s) => {
let l = s.lock().unwrap();
r.prev_media_duration =
l.prev_media_duration + recording::Duration(l.media_duration_90k.into());
r.prev_runs = l.prev_runs + if l.run_offset == 0 { 1 } else { 0 };
}
None => {
r.prev_media_duration = stream.cum_media_duration;
r.prev_runs = stream.cum_runs;
}
};
let recording = Arc::new(Mutex::new(r));
stream.uncommitted.push_back(Arc::clone(&recording));
Ok((id, recording))
}
/// Marks the given uncomitted recording as synced and ready to flush.
/// This must be the next unsynced recording.
pub(crate) fn mark_synced(&mut self, id: CompositeId) -> Result<(), Error> {
let stream = match self.streams_by_id.get_mut(&id.stream()) {
None => bail!(FailedPrecondition, msg("no stream for recording {id}")),
Some(s) => s,
};
let next_unsynced = stream.cum_recordings + (stream.synced_recordings as i32);
if id.recording() != next_unsynced {
bail!(
FailedPrecondition,
msg(
"can't sync {} when next unsynced recording is {} (next unflushed is {})",
id,
next_unsynced,
stream.cum_recordings,
),
);
}
if stream.synced_recordings == stream.uncommitted.len() {
bail!(
FailedPrecondition,
msg("can't sync un-added recording {id}")
);
}
let l = stream.uncommitted[stream.synced_recordings].lock().unwrap();
let bytes = i64::from(l.sample_file_bytes);
stream.bytes_to_add += bytes;
stream.fs_bytes_to_add += round_up(bytes);
stream.synced_recordings += 1;
Ok(())
}
pub(crate) fn delete_garbage(
&mut self,
dir_id: i32,
ids: &mut Vec<CompositeId>,
) -> Result<(), Error> {
let dir = match self.sample_file_dirs_by_id.get_mut(&dir_id) {
None => bail!(FailedPrecondition, msg("no such dir {dir_id}")),
Some(d) => d,
};
dir.garbage_unlinked.reserve(ids.len());
ids.retain(|id| {
if !dir.garbage_needs_unlink.remove(id) {
return true;
}
dir.garbage_unlinked.push(*id);
false
});
if !ids.is_empty() {
bail!(
FailedPrecondition,
msg("delete_garbage with non-garbage ids {:?}", &ids[..])
);
}
Ok(())
}
/// Registers a callback to run on every live segment immediately after it's recorded.
/// The callback is run with the database lock held, so it must not call back into the database
/// or block. The callback should return false to unregister.
pub fn watch_live(
&mut self,
stream_id: i32,
cb: Box<dyn FnMut(LiveSegment) -> bool + Send>,
) -> Result<(), Error> {
let s = match self.streams_by_id.get_mut(&stream_id) {
None => bail!(NotFound, msg("no such stream {stream_id}")),
Some(s) => s,
};
s.on_live_segment.push(cb);
Ok(())
}
/// Clears all watches on all streams.
/// Normally watches are self-cleaning: when a segment is sent, the callback returns false if
/// it is no longer interested (typically because hyper has just noticed the client is no
/// longer connected). This doesn't work when the system is shutting down and nothing more is
/// sent, though.
pub fn clear_watches(&mut self) {
for s in self.streams_by_id.values_mut() {
s.on_live_segment.clear();
}
}
pub(crate) fn send_live_segment(&mut self, stream: i32, l: LiveSegment) -> Result<(), Error> {
let s = match self.streams_by_id.get_mut(&stream) {
None => bail!(Internal, msg("no such stream {stream}")),
Some(s) => s,
};
// TODO: use std's retain_mut after it's available in our minimum supported Rust version.
// <https://github.com/rust-lang/rust/issues/48919>
odds::vec::VecExt::retain_mut(&mut s.on_live_segment, |cb| cb(l.clone()));
Ok(())
}
/// Helper for `DatabaseGuard::flush()` and `Database::drop()`.
///
/// The public API is in `DatabaseGuard::flush()`; it supplies the `Clocks` to this function.
fn flush<C: Clocks>(&mut self, clocks: &C, reason: &str) -> Result<(), Error> {
let span = tracing::info_span!("flush", flush_count = self.flush_count, reason);
let _enter = span.enter();
let o = match self.open.as_ref() {
None => bail!(Internal, msg("database is read-only")),
Some(o) => o,
};
let tx = self.conn.transaction()?;
let mut new_ranges =
FnvHashMap::with_capacity_and_hasher(self.streams_by_id.len(), Default::default());
{
let mut stmt = tx.prepare_cached(UPDATE_STREAM_COUNTERS_SQL)?;
for (&stream_id, s) in &self.streams_by_id {
// Process additions.
let mut new_duration = 0;
let mut new_runs = 0;
for i in 0..s.synced_recordings {
let l = s.uncommitted[i].lock().unwrap();
raw::insert_recording(
&tx,
o,
CompositeId::new(stream_id, s.cum_recordings + i as i32),
&l,
)?;
new_duration += i64::from(l.wall_duration_90k);
new_runs += if l.run_offset == 0 { 1 } else { 0 };
}
if s.synced_recordings > 0 {
new_ranges.entry(stream_id).or_insert(None);
stmt.execute(named_params! {
":stream_id": stream_id,
":cum_recordings": s.cum_recordings + s.synced_recordings as i32,
":cum_media_duration_90k": s.cum_media_duration.0 + new_duration,
":cum_runs": s.cum_runs + new_runs,
})?;
}
// Process deletions.
if let Some(l) = s.to_delete.last() {
new_ranges.entry(stream_id).or_insert(None);
let dir = match s.sample_file_dir_id {
None => bail!(Internal, msg("stream {stream_id} has no directory!")),
Some(d) => d,
};
// raw::delete_recordings does a bulk transfer of a range from recording to
// garbage, rather than operating on each element of to_delete. This is
// guaranteed to give the same result because to_delete is guaranteed to be the
// oldest recordings for the stream.
let start = CompositeId::new(stream_id, 0);
let end = CompositeId(l.id.0 + 1);
let n = raw::delete_recordings(&tx, dir, start..end)?;
if n != s.to_delete.len() {
bail!(
Internal,
msg(
"Found {} rows in {} .. {}, expected {}: {:?}",
n,
start,
end,
s.to_delete.len(),
&s.to_delete,
),
);
}
}
}
}
for dir in self.sample_file_dirs_by_id.values() {
raw::mark_sample_files_deleted(&tx, &dir.garbage_unlinked)?;
}
for (&stream_id, r) in &mut new_ranges {
*r = raw::get_range(&tx, stream_id)?;
}
{
let mut stmt = tx.prepare_cached(
r"update open set duration_90k = ?, end_time_90k = ? where id = ?",
)?;
let rows = stmt.execute(params![
(recording::Time::new(clocks.monotonic()) - self.open_monotonic).0,
recording::Time::new(clocks.realtime()).0,
o.id,
])?;
if rows != 1 {
bail!(Internal, msg("unable to find current open {}", o.id));
}
}
self.auth.flush(&tx)?;
self.signal.flush(&tx)?;
tx.commit()?;
#[derive(Default)]
struct DirLog {
added: SmallVec<[CompositeId; 32]>,
deleted: SmallVec<[CompositeId; 32]>,
gced: SmallVec<[CompositeId; 32]>,
added_bytes: i64,
deleted_bytes: i64,
}
let mut dir_logs: FnvHashMap<i32, DirLog> = FnvHashMap::default();
// Process delete_garbage.
for (&id, dir) in &mut self.sample_file_dirs_by_id {
if !dir.garbage_unlinked.is_empty() {
dir_logs
.entry(id)
.or_default()
.gced
.extend(dir.garbage_unlinked.drain(..));
}
}
for (stream_id, new_range) in new_ranges.drain() {
let s = self.streams_by_id.get_mut(&stream_id).unwrap();
let dir_id = s.sample_file_dir_id.unwrap();
let dir = self.sample_file_dirs_by_id.get_mut(&dir_id).unwrap();
let log = dir_logs.entry(dir_id).or_default();
// Process delete_oldest_recordings.
s.sample_file_bytes -= s.bytes_to_delete;
s.fs_bytes -= s.fs_bytes_to_delete;
log.deleted_bytes += s.bytes_to_delete;
s.bytes_to_delete = 0;
s.fs_bytes_to_delete = 0;
log.deleted.reserve(s.to_delete.len());
for row in s.to_delete.drain(..) {
log.deleted.push(row.id);
dir.garbage_needs_unlink.insert(row.id);
let d = recording::Duration(i64::from(row.wall_duration_90k));
s.duration -= d;
s.committed_days.adjust(row.start..row.start + d, -1);
}
// Process add_recordings.
log.added_bytes += s.bytes_to_add;
s.bytes_to_add = 0;
s.fs_bytes_to_add = 0;
log.added.reserve(s.synced_recordings);
for _ in 0..s.synced_recordings {
let u = s.uncommitted.pop_front().unwrap();
log.added
.push(CompositeId::new(stream_id, s.cum_recordings));
let l = u.lock().unwrap();
s.cum_recordings += 1;
let wall_dur = recording::Duration(l.wall_duration_90k.into());
let media_dur = recording::Duration(l.media_duration_90k.into());
s.cum_media_duration += media_dur;
s.cum_runs += if l.run_offset == 0 { 1 } else { 0 };
let end = l.start + wall_dur;
s.add_recording(l.start..end, l.sample_file_bytes);
}
s.synced_recordings = 0;
// Fix the range.
s.range = new_range;
}
self.auth.post_flush();
self.signal.post_flush();
self.flush_count += 1;
let mut log_msg = String::with_capacity(256);
for (&dir_id, log) in &dir_logs {
let dir = self.sample_file_dirs_by_id.get(&dir_id).unwrap();
write!(
&mut log_msg,
"\n{}: added {}B in {} recordings ({}), deleted {}B in {} ({}), \
GCed {} recordings ({}).",
dir.path.display(),
&encode_size(log.added_bytes),
log.added.len(),
log.added.iter().join(", "),
&encode_size(log.deleted_bytes),
log.deleted.len(),
log.deleted.iter().join(", "),
log.gced.len(),
log.gced.iter().join(", ")
)
.unwrap();
}
if log_msg.is_empty() {
log_msg.push_str(" no recording changes");
}
info!("flush complete: {log_msg}");
for cb in &self.on_flush {
cb();
}
Ok(())
}
/// Sets a watcher which will receive an (empty) event on successful flush.
/// The lock will be held while this is run, so it should not do any I/O.
pub(crate) fn on_flush(&mut self, run: Box<dyn Fn() + Send>) {
self.on_flush.push(run);
}
// TODO: find a cleaner way to do this. Seems weird for src/cmds/run.rs to clear the on flush
// handlers given that it didn't add them.
pub fn clear_on_flush(&mut self) {
self.on_flush.clear();
}
/// Opens the given sample file directories.
///
/// `ids` is implicitly de-duplicated.
///
/// When the database is in read-only mode, this simply opens all the directories after
/// locking and verifying their metadata matches the database state. In read-write mode, it
/// performs a single database transaction to update metadata for all dirs, then performs a like
/// update to the directories' on-disk metadata.
///
/// Note this violates the principle of never accessing disk while holding the database lock.
/// Currently this only happens at startup (or during configuration), so this isn't a problem
/// in practice.
pub fn open_sample_file_dirs(&mut self, ids: &[i32]) -> Result<(), Error> {
let mut in_progress = FnvHashMap::with_capacity_and_hasher(ids.len(), Default::default());
for &id in ids {
let e = in_progress.entry(id);
use ::std::collections::hash_map::Entry;
let e = match e {
Entry::Occupied(_) => continue, // suppress duplicate.
Entry::Vacant(e) => e,
};
let dir = self
.sample_file_dirs_by_id
.get_mut(&id)
.ok_or_else(|| err!(NotFound, msg("no such dir {id}")))?;
if dir.dir.is_some() {
continue;
}
let mut expected_meta = dir.expected_meta(&self.uuid);
if let Some(o) = self.open.as_ref() {
let open = expected_meta.in_progress_open.mut_or_insert_default();
open.id = o.id;
open.uuid.extend_from_slice(&o.uuid.as_bytes()[..]);
}
let d = dir::SampleFileDir::open(&dir.path, &expected_meta)
.map_err(|e| err!(e, msg("Failed to open dir {}", dir.path.display())))?;
if self.open.is_none() {
// read-only mode; it's already fully opened.
dir.dir = Some(d);
} else {
// read-write mode; there are more steps to do.
e.insert((expected_meta, d));
}
}
let o = match self.open.as_ref() {
None => return Ok(()), // read-only mode; all done.
Some(o) => o,
};
let tx = self.conn.transaction()?;
{
let mut stmt = tx.prepare_cached(
r#"
update sample_file_dir set last_complete_open_id = ? where id = ?
"#,
)?;
for &id in in_progress.keys() {
if stmt.execute(params![o.id, id])? != 1 {
bail!(Internal, msg("unable to update dir {id}"));
}
}
}
tx.commit()?;
for (id, (mut meta, d)) in in_progress.drain() {
let dir = self.sample_file_dirs_by_id.get_mut(&id).unwrap();
meta.last_complete_open = meta.in_progress_open.take().into();
d.write_meta(&meta)?;
dir.dir = Some(d);
}
Ok(())
}
pub fn streams_by_id(&self) -> &BTreeMap<i32, Stream> {
&self.streams_by_id
}
/// Returns an immutable view of the video sample entries.
pub fn video_sample_entries_by_id(&self) -> &BTreeMap<i32, Arc<VideoSampleEntry>> {
&self.video_sample_entries_by_id
}
/// Gets a given camera by uuid.
pub fn get_camera(&self, uuid: Uuid) -> Option<&Camera> {
self.cameras_by_uuid.get(&uuid).map(|id| {
self.cameras_by_id
.get(id)
.expect("uuid->id requires id->cam")
})
}
/// Lists the specified recordings, passing them to a supplied function. Given that the
/// function is called with the database lock held, it should be quick.
///
/// Note that at present, the returned recordings are _not_ completely ordered by start time.
/// Uncommitted recordings are returned id order after the others.
pub fn list_recordings_by_time(
&self,
stream_id: i32,
desired_time: Range<recording::Time>,
f: &mut dyn FnMut(ListRecordingsRow) -> Result<(), base::Error>,
) -> Result<(), base::Error> {
let s = match self.streams_by_id.get(&stream_id) {
None => bail!(NotFound, msg("no such stream {stream_id}")),
Some(s) => s,
};
raw::list_recordings_by_time(&self.conn, stream_id, desired_time.clone(), f)?;
for (i, u) in s.uncommitted.iter().enumerate() {
let row = {
let l = u.lock().unwrap();
if l.video_samples > 0 {
let end = l.start + recording::Duration(l.wall_duration_90k as i64);
if l.start > desired_time.end || end < desired_time.start {
continue; // there's no overlap with the requested range.
}
l.to_list_row(
CompositeId::new(stream_id, s.cum_recordings + i as i32),
self.open.unwrap().id,
)
} else {
continue;
}
};
f(row)?;
}
Ok(())
}
/// Lists the specified recordings in ascending order by id.
pub fn list_recordings_by_id(
&self,
stream_id: i32,
desired_ids: Range<i32>,
f: &mut dyn FnMut(ListRecordingsRow) -> Result<(), base::Error>,
) -> Result<(), base::Error> {
let s = match self.streams_by_id.get(&stream_id) {
None => bail!(NotFound, msg("no such stream {stream_id}")),
Some(s) => s,
};
if desired_ids.start < s.cum_recordings {
raw::list_recordings_by_id(&self.conn, stream_id, desired_ids.clone(), f)?;
}
if desired_ids.end > s.cum_recordings {
let start = cmp::max(0, desired_ids.start - s.cum_recordings) as usize;
let end = cmp::min(
(desired_ids.end - s.cum_recordings) as usize,
s.uncommitted.len(),
);
for i in start..end {
let row = {
let l = s.uncommitted[i].lock().unwrap();
if l.video_samples > 0 {
l.to_list_row(
CompositeId::new(stream_id, s.cum_recordings + i as i32),
self.open.unwrap().id,
)
} else {
continue;
}
};
f(row)?;
}
}
Ok(())
}
/// Calls `list_recordings_by_time` and aggregates consecutive recordings.
/// Rows are given to the callback in arbitrary order. Callers which care about ordering
/// should do their own sorting.
pub fn list_aggregated_recordings(
&self,
stream_id: i32,
desired_time: Range<recording::Time>,
forced_split: recording::Duration,
f: &mut dyn FnMut(&ListAggregatedRecordingsRow) -> Result<(), base::Error>,
) -> Result<(), base::Error> {
// Iterate, maintaining a map from a recording_id to the aggregated row for the latest
// batch of recordings from the run starting at that id. Runs can be split into multiple
// batches for a few reasons:
//
// * forced split (when exceeding a duration limit)
// * a missing id (one that was deleted out of order)
// * video_sample_entry mismatch (if the parameters changed during a RTSP session)
//
// This iteration works because in a run, the start_time+duration of recording id r
// is equal to the start_time of recording id r+1. Thus ascending times guarantees
// ascending ids within a run. (Different runs, however, can be arbitrarily interleaved if
// their timestamps overlap. Tracking all active runs prevents that interleaving from
// causing problems.) list_recordings_by_time also returns uncommitted recordings in
// ascending order by id, and after any committed recordings with lower ids.
let mut aggs: BTreeMap<i32, ListAggregatedRecordingsRow> = BTreeMap::new();
self.list_recordings_by_time(stream_id, desired_time, &mut |row| {
let recording_id = row.id.recording();
let run_start_id = recording_id - row.run_offset;
let uncommitted = (row.flags & RecordingFlags::Uncommitted as i32) != 0;
let growing = (row.flags & RecordingFlags::Growing as i32) != 0;
let has_trailing_zero = (row.flags & RecordingFlags::TrailingZero as i32) != 0;
use std::collections::btree_map::Entry;
match aggs.entry(run_start_id) {
Entry::Occupied(mut e) => {
let a = e.get_mut();
let new_dur = a.time.end - a.time.start
+ recording::Duration(row.wall_duration_90k as i64);
let needs_flush = a.ids.end != recording_id
|| row.video_sample_entry_id != a.video_sample_entry_id
|| new_dur >= forced_split;
if needs_flush {
// flush then start a new entry.
f(a)?;
*a = ListAggregatedRecordingsRow::from(row);
} else {
// append.
if a.time.end != row.start {
bail!(
Internal,
msg(
"stream {} recording {} ends at {} but {} starts at {}",
stream_id,
a.ids.end - 1,
a.time.end,
row.id,
row.start,
),
);
}
if a.open_id != row.open_id {
bail!(
Internal,
msg(
"stream {} recording {} has open id {} but {} has {}",
stream_id,
a.ids.end - 1,
a.open_id,
row.id,
row.open_id,
),
);
}
a.time.end.0 += row.wall_duration_90k as i64;
a.ids.end = recording_id + 1;
a.video_samples += row.video_samples as i64;
a.video_sync_samples += row.video_sync_samples as i64;
a.sample_file_bytes += row.sample_file_bytes as i64;
if uncommitted {
a.first_uncommitted = a.first_uncommitted.or(Some(recording_id));
}
a.growing = growing;
a.has_trailing_zero = has_trailing_zero;
}
}
Entry::Vacant(e) => {
e.insert(ListAggregatedRecordingsRow::from(row));
}
}
Ok(())
})?;
for a in aggs.values() {
f(a)?;
}
Ok(())
}
/// Calls `f` with a single `recording_playback` row.
/// Note the lock is held for the duration of `f`.
/// This uses a LRU cache to reduce the number of retrievals from the database.
pub fn with_recording_playback<R>(
&self,
id: CompositeId,
f: &mut dyn FnMut(&RecordingPlayback) -> Result<R, Error>,
) -> Result<R, Error> {
// Check for uncommitted path.
let s = self
.streams_by_id
.get(&id.stream())
.ok_or_else(|| err!(Internal, msg("no stream for {}", id)))?;
if s.cum_recordings <= id.recording() {
let i = id.recording() - s.cum_recordings;
if i as usize >= s.uncommitted.len() {
bail!(
Internal,
msg(
"no such recording {}; latest committed is {}, latest is {}",
id,
s.cum_recordings,
s.cum_recordings + s.uncommitted.len() as i32,
),
);
}
let l = s.uncommitted[i as usize].lock().unwrap();
return f(&RecordingPlayback {
video_index: &l.video_index,
});
}
// Committed path.
let mut cache = self.video_index_cache.borrow_mut();
use hashlink::linked_hash_map::RawEntryMut;
match cache.raw_entry_mut().from_key(&id.0) {
RawEntryMut::Occupied(mut occupied) => {
trace!("cache hit for recording {}", id);
occupied.to_back();
let video_index = occupied.get();
f(&RecordingPlayback { video_index })
}
RawEntryMut::Vacant(vacant) => {
trace!("cache miss for recording {}", id);
let mut stmt = self.conn.prepare_cached(GET_RECORDING_PLAYBACK_SQL)?;
let mut rows = stmt.query(named_params! {":composite_id": id.0})?;
if let Some(row) = rows.next()? {
let video_index: VideoIndex = row.get(0)?;
let result = f(&RecordingPlayback {
video_index: &video_index.0[..],
});
vacant.insert(id.0, video_index.0);
if cache.len() > VIDEO_INDEX_CACHE_LEN {
cache.pop_front();
}
return result;
}
Err(err!(Internal, msg("no such recording {id}")))
}
}
}
/// Queues for deletion the oldest recordings that aren't already queued.
/// `f` should return true for each row that should be deleted.
pub(crate) fn delete_oldest_recordings(
&mut self,
stream_id: i32,
f: &mut dyn FnMut(&ListOldestRecordingsRow) -> bool,
) -> Result<(), Error> {
let s = match self.streams_by_id.get_mut(&stream_id) {
None => bail!(Internal, msg("no stream {stream_id}")),
Some(s) => s,
};
let end = match s.to_delete.last() {
None => 0,
Some(row) => row.id.recording() + 1,
};
raw::list_oldest_recordings(&self.conn, CompositeId::new(stream_id, end), &mut |r| {
if f(&r) {
s.to_delete.push(r);
let bytes = i64::from(r.sample_file_bytes);
s.bytes_to_delete += bytes;
s.fs_bytes_to_delete += round_up(bytes);
return true;
}
false
})
}
/// Initializes the video_sample_entries. To be called during construction.
fn init_video_sample_entries(&mut self) -> Result<(), Error> {
info!("Loading video sample entries");
let mut stmt = self.conn.prepare(
r#"
select
id,
width,
height,
pasp_h_spacing,
pasp_v_spacing,
rfc6381_codec,
data
from
video_sample_entry
"#,
)?;
let mut rows = stmt.query(params![])?;
while let Some(row) = rows.next()? {
let id = row.get(0)?;
let data: Vec<u8> = row.get(6)?;
let get_and_cvt = |i: usize| {
let raw = row.get::<_, i32>(i)?;
u16::try_from(raw).map_err(|e| err!(OutOfRange, source(e)))
};
self.video_sample_entries_by_id.insert(
id,
Arc::new(VideoSampleEntry {
id,
width: get_and_cvt(1)?,
height: get_and_cvt(2)?,
pasp_h_spacing: get_and_cvt(3)?,
pasp_v_spacing: get_and_cvt(4)?,
data,
rfc6381_codec: row.get(5)?,
}),
);
}
info!(
"Loaded {} video sample entries",
self.video_sample_entries_by_id.len()
);
Ok(())
}
/// Initializes the sample file dirs.
/// To be called during construction.
fn init_sample_file_dirs(&mut self) -> Result<(), Error> {
info!("Loading sample file dirs");
let mut stmt = self.conn.prepare(
r#"
select
d.id,
d.config,
d.uuid,
d.last_complete_open_id,
o.uuid
from
sample_file_dir d left join open o on (d.last_complete_open_id = o.id);
"#,
)?;
let mut rows = stmt.query(params![])?;
while let Some(row) = rows.next()? {
let id = row.get(0)?;
let config: SampleFileDirConfig = row.get(1)?;
let dir_uuid: SqlUuid = row.get(2)?;
let open_id: Option<u32> = row.get(3)?;
let open_uuid: Option<SqlUuid> = row.get(4)?;
let last_complete_open = match (open_id, open_uuid) {
(Some(id), Some(uuid)) => Some(Open { id, uuid: uuid.0 }),
(None, None) => None,
_ => bail!(Internal, msg("open table missing id {id}")),
};
self.sample_file_dirs_by_id.insert(
id,
SampleFileDir {
id,
uuid: dir_uuid.0,
path: config.path,
dir: None,
last_complete_open,
garbage_needs_unlink: raw::list_garbage(&self.conn, id)?,
garbage_unlinked: Vec::new(),
},
);
}
info!(
"Loaded {} sample file dirs",
self.sample_file_dirs_by_id.len()
);
Ok(())
}
/// Initializes the cameras, but not their matching recordings.
/// To be called during construction.
fn init_cameras(&mut self) -> Result<(), Error> {
info!("Loading cameras");
let mut stmt = self.conn.prepare(
r#"
select
id,
uuid,
short_name,
config
from
camera;
"#,
)?;
let mut rows = stmt.query(params![])?;
while let Some(row) = rows.next()? {
let id = row.get(0)?;
let uuid: SqlUuid = row.get(1)?;
self.cameras_by_id.insert(
id,
Camera {
id,
uuid: uuid.0,
short_name: row.get(2)?,
config: row.get(3)?,
streams: Default::default(),
},
);
self.cameras_by_uuid.insert(uuid.0, id);
}
info!("Loaded {} cameras", self.cameras_by_id.len());
Ok(())
}
/// Initializes the streams, but not their matching recordings.
/// To be called during construction.
fn init_streams(&mut self) -> Result<(), Error> {
info!("Loading streams");
let mut stmt = self.conn.prepare(
r#"
select
id,
type,
camera_id,
sample_file_dir_id,
config,
cum_recordings,
cum_media_duration_90k,
cum_runs
from
stream;
"#,
)?;
let mut rows = stmt.query(params![])?;
while let Some(row) = rows.next()? {
let id = row.get(0)?;
let type_: String = row.get(1)?;
let type_ = StreamType::parse(&type_)
.ok_or_else(|| err!(DataLoss, msg("no such stream type {type_}")))?;
let camera_id = row.get(2)?;
let c = self
.cameras_by_id
.get_mut(&camera_id)
.ok_or_else(|| err!(DataLoss, msg("missing camera {camera_id} for stream {id}")))?;
self.streams_by_id.insert(
id,
Stream {
id,
type_,
camera_id,
sample_file_dir_id: row.get(3)?,
config: row.get(4)?,
range: None,
sample_file_bytes: 0,
fs_bytes: 0,
to_delete: Vec::new(),
bytes_to_delete: 0,
fs_bytes_to_delete: 0,
bytes_to_add: 0,
fs_bytes_to_add: 0,
duration: recording::Duration(0),
committed_days: days::Map::default(),
cum_recordings: row.get(5)?,
cum_media_duration: recording::Duration(row.get(6)?),
cum_runs: row.get(7)?,
uncommitted: VecDeque::new(),
synced_recordings: 0,
on_live_segment: Vec::new(),
},
);
c.streams[type_.index()] = Some(id);
}
info!("Loaded {} streams", self.streams_by_id.len());
Ok(())
}
/// Inserts the specified video sample entry if absent.
/// On success, returns the id of a new or existing row.
pub fn insert_video_sample_entry(
&mut self,
entry: VideoSampleEntryToInsert,
) -> Result<i32, Error> {
// Check if it already exists.
// There shouldn't be too many entries, so it's fine to enumerate everything.
for (&id, v) in &self.video_sample_entries_by_id {
if v.data == entry.data {
// The other fields are derived from data, so differences indicate a bug.
if v.width != entry.width
|| v.height != entry.height
|| v.pasp_h_spacing != entry.pasp_h_spacing
|| v.pasp_v_spacing != entry.pasp_v_spacing
{
bail!(
Internal,
msg("video_sample_entry id {id}: existing entry {v:?}, new {entry:?}"),
);
}
return Ok(id);
}
}
let mut stmt = self.conn.prepare_cached(INSERT_VIDEO_SAMPLE_ENTRY_SQL)?;
stmt.execute(named_params! {
":width": i32::from(entry.width),
":height": i32::from(entry.height),
":pasp_h_spacing": i32::from(entry.pasp_h_spacing),
":pasp_v_spacing": i32::from(entry.pasp_v_spacing),
":rfc6381_codec": &entry.rfc6381_codec,
":data": &entry.data,
})
.map_err(|e| err!(e, msg("Unable to insert {entry:#?}")))?;
let id = self.conn.last_insert_rowid() as i32;
self.video_sample_entries_by_id.insert(
id,
Arc::new(VideoSampleEntry {
id,
width: entry.width,
height: entry.height,
pasp_h_spacing: entry.pasp_h_spacing,
pasp_v_spacing: entry.pasp_v_spacing,
data: entry.data,
rfc6381_codec: entry.rfc6381_codec,
}),
);
Ok(id)
}
pub fn add_sample_file_dir(&mut self, path: PathBuf) -> Result<i32, Error> {
let mut meta = schema::DirMeta::default();
let uuid = Uuid::new_v4();
let uuid_bytes = &uuid.as_bytes()[..];
let o = self
.open
.as_ref()
.ok_or_else(|| err!(FailedPrecondition, msg("database is read-only")))?;
// Populate meta.
{
meta.db_uuid.extend_from_slice(&self.uuid.as_bytes()[..]);
meta.dir_uuid.extend_from_slice(uuid_bytes);
let open = meta.in_progress_open.mut_or_insert_default();
open.id = o.id;
open.uuid.extend_from_slice(&o.uuid.as_bytes()[..]);
}
let dir = dir::SampleFileDir::create(&path, &meta)?;
let config = SampleFileDirConfig {
path: path.clone(),
..Default::default()
};
self.conn.execute(
r#"
insert into sample_file_dir (config, uuid, last_complete_open_id)
values (?, ?, ?)
"#,
params![&config, uuid_bytes, o.id],
)?;
let id = self.conn.last_insert_rowid() as i32;
use ::std::collections::btree_map::Entry;
let e = self.sample_file_dirs_by_id.entry(id);
let d = match e {
Entry::Vacant(e) => e.insert(SampleFileDir {
id,
path,
uuid,
dir: Some(dir),
last_complete_open: Some(*o),
garbage_needs_unlink: FnvHashSet::default(),
garbage_unlinked: Vec::new(),
}),
Entry::Occupied(_) => bail!(Internal, msg("duplicate sample file dir id {id}")),
};
meta.last_complete_open = meta.in_progress_open.take().into();
d.dir.as_ref().unwrap().write_meta(&meta)?;
Ok(id)
}
pub fn delete_sample_file_dir(&mut self, dir_id: i32) -> Result<(), Error> {
for (&id, s) in self.streams_by_id.iter() {
if s.sample_file_dir_id == Some(dir_id) {
bail!(
FailedPrecondition,
msg("can't delete dir referenced by stream {id}")
);
}
}
let mut d = match self.sample_file_dirs_by_id.entry(dir_id) {
::std::collections::btree_map::Entry::Occupied(e) => e,
_ => bail!(NotFound, msg("no such dir {dir_id} to remove")),
};
if !d.get().garbage_needs_unlink.is_empty() || !d.get().garbage_unlinked.is_empty() {
bail!(
FailedPrecondition,
msg(
"must collect garbage before deleting directory {}",
d.get().path.display(),
),
);
}
let dir = match d.get_mut().dir.take() {
None => dir::SampleFileDir::open(&d.get().path, &d.get().expected_meta(&self.uuid))?,
Some(arc) => match Arc::strong_count(&arc) {
1 => arc, // LockedDatabase is only reference
c => {
// a writer::Syncer also has a reference.
d.get_mut().dir = Some(arc); // put it back.
bail!(
FailedPrecondition,
msg("can't delete directory {dir_id} with active syncer (refcnt {c})"),
);
}
},
};
if !dir.is_empty()? {
bail!(
FailedPrecondition,
msg(
"can't delete sample file directory {} which still has files",
&d.get().path.display(),
),
);
}
let mut meta = d.get().expected_meta(&self.uuid);
meta.in_progress_open = meta.last_complete_open.take().into();
dir.write_meta(&meta)?;
if self
.conn
.execute("delete from sample_file_dir where id = ?", params![dir_id])?
!= 1
{
bail!(Internal, msg("missing database row for dir {dir_id}"));
}
d.remove_entry();
Ok(())
}
/// Adds a camera.
pub fn add_camera(&mut self, mut camera: CameraChange) -> Result<i32, Error> {
let uuid = Uuid::new_v4();
let uuid_bytes = &uuid.as_bytes()[..];
let tx = self.conn.transaction()?;
let streams;
let camera_id;
{
let mut stmt = tx.prepare_cached(
r#"
insert into camera (uuid, short_name, config)
values (:uuid, :short_name, :config)
"#,
)?;
stmt.execute(named_params! {
":uuid": uuid_bytes,
":short_name": &camera.short_name,
":config": &camera.config,
})?;
camera_id = tx.last_insert_rowid() as i32;
streams =
StreamStateChanger::new(&tx, camera_id, None, &self.streams_by_id, &mut camera)?;
}
tx.commit()?;
let streams = streams.apply(&mut self.streams_by_id);
self.cameras_by_id.insert(
camera_id,
Camera {
id: camera_id,
uuid,
short_name: camera.short_name,
config: camera.config,
streams,
},
);
self.cameras_by_uuid.insert(uuid, camera_id);
Ok(camera_id)
}
/// Returns a `CameraChange` for the given camera which does nothing.
///
/// The caller can modify it to taste then pass it to `update_camera`.
/// TODO: consider renaming this to `update_camera` and creating a bulk
/// `apply_camera_changes`.
pub fn null_camera_change(&mut self, camera_id: i32) -> Result<CameraChange, Error> {
let Some(camera) = self.cameras_by_id.get(&camera_id) else {
bail!(Internal, msg("no such camera {camera_id}"));
};
let mut change = CameraChange {
short_name: camera.short_name.clone(),
config: camera.config.clone(),
streams: Default::default(),
};
for i in 0..NUM_STREAM_TYPES {
if let Some(stream_id) = camera.streams[i] {
let s = self
.streams_by_id
.get(&stream_id)
.expect("cameras reference valid streams");
change.streams[i] = StreamChange {
sample_file_dir_id: s.sample_file_dir_id,
config: s.config.clone(),
};
}
}
Ok(change)
}
/// Updates a camera.
pub fn update_camera(&mut self, camera_id: i32, mut camera: CameraChange) -> Result<(), Error> {
let tx = self.conn.transaction()?;
let streams;
let Some(c) = self.cameras_by_id.get_mut(&camera_id) else {
bail!(Internal, msg("no such camera {camera_id}"));
};
{
streams =
StreamStateChanger::new(&tx, camera_id, Some(c), &self.streams_by_id, &mut camera)?;
let mut stmt = tx.prepare_cached(
r#"
update camera set
short_name = :short_name,
config = :config
where
id = :id
"#,
)?;
let rows = stmt.execute(named_params! {
":id": camera_id,
":short_name": &camera.short_name,
":config": &camera.config,
})?;
if rows != 1 {
bail!(Internal, msg("camera {camera_id} missing from database"));
}
}
tx.commit()?;
c.short_name = camera.short_name;
c.config = camera.config;
c.streams = streams.apply(&mut self.streams_by_id);
Ok(())
}
/// Deletes a camera and its streams. The camera must have no recordings.
pub fn delete_camera(&mut self, id: i32) -> Result<(), Error> {
// TODO: also verify there are no uncommitted recordings.
let Some(uuid) = self.cameras_by_id.get(&id).map(|c| c.uuid) else {
bail!(NotFound, msg("no such camera {id}"));
};
let mut streams_to_delete = Vec::new();
let tx = self.conn.transaction()?;
{
let mut stream_stmt = tx.prepare_cached(r"delete from stream where id = :id")?;
for (stream_id, stream) in &self.streams_by_id {
if stream.camera_id != id {
continue;
};
if stream.range.is_some() {
bail!(
FailedPrecondition,
msg("can't remove camera {id}; has recordings")
);
}
let rows = stream_stmt.execute(named_params! {":id": stream_id})?;
if rows != 1 {
bail!(Internal, msg("stream {id} missing from database"));
}
streams_to_delete.push(*stream_id);
}
let mut cam_stmt = tx.prepare_cached(r"delete from camera where id = :id")?;
let rows = cam_stmt.execute(named_params! {":id": id})?;
if rows != 1 {
bail!(Internal, msg("camera {id} missing from database"));
}
}
tx.commit()?;
for id in streams_to_delete {
self.streams_by_id.remove(&id);
}
self.cameras_by_id.remove(&id);
self.cameras_by_uuid.remove(&uuid);
Ok(())
}
// TODO: it'd make more sense to have a bulk camera/stream edit API than
// this specific one.
pub fn update_retention(&mut self, changes: &[RetentionChange]) -> Result<(), Error> {
// TODO: should validate there's only one change per id.
let tx = self.conn.transaction()?;
{
let mut stmt = tx.prepare_cached(
r#"
update stream
set
config = :config
where
id = :id
"#,
)?;
for c in changes {
let Some(stream) = self.streams_by_id.get(&c.stream_id) else {
bail!(Internal, msg("no such stream {}", c.stream_id));
};
let mut new_config = stream.config.clone();
new_config.mode = (if c.new_record { "record" } else { "" }).into();
new_config.retain_bytes = c.new_limit;
let rows = stmt.execute(named_params! {
":config": &new_config,
":id": c.stream_id,
})?;
assert_eq!(rows, 1, "missing stream {}", c.stream_id);
}
}
tx.commit()?;
for c in changes {
let s = self
.streams_by_id
.get_mut(&c.stream_id)
.expect("stream in db but not state");
s.config.mode = (if c.new_record { "record" } else { "" }).into();
s.config.retain_bytes = c.new_limit;
}
Ok(())
}
// ---- auth ----
pub fn users_by_id(&self) -> &BTreeMap<i32, User> {
self.auth.users_by_id()
}
pub fn get_user_by_id_mut(&mut self, id: i32) -> Option<&mut User> {
self.auth.get_user_by_id_mut(id)
}
pub fn apply_user_change(&mut self, change: UserChange) -> Result<&User, base::Error> {
self.auth.apply(&self.conn, change)
}
pub fn delete_user(&mut self, id: i32) -> Result<(), base::Error> {
self.auth.delete_user(&mut self.conn, id)
}
pub fn get_user(&self, username: &str) -> Option<&User> {
self.auth.get_user(username)
}
pub fn login_by_password(
&mut self,
req: auth::Request,
username: &str,
password: String,
domain: Option<Vec<u8>>,
session_flags: i32,
) -> Result<(RawSessionId, &Session), base::Error> {
self.auth
.login_by_password(&self.conn, req, username, password, domain, session_flags)
}
pub fn make_session(
&mut self,
creation: Request,
uid: i32,
domain: Option<Vec<u8>>,
flags: i32,
permissions: schema::Permissions,
) -> Result<(RawSessionId, &Session), base::Error> {
self.auth
.make_session(&self.conn, creation, uid, domain, flags, permissions)
}
pub fn authenticate_session(
&mut self,
req: auth::Request,
sid: &auth::SessionHash,
) -> Result<(&auth::Session, &User), base::Error> {
self.auth.authenticate_session(&self.conn, req, sid)
}
pub fn revoke_session(
&mut self,
reason: auth::RevocationReason,
detail: Option<String>,
req: auth::Request,
hash: &auth::SessionHash,
) -> Result<(), base::Error> {
self.auth
.revoke_session(&self.conn, reason, detail, req, hash)
}
// ---- signal ----
pub fn signals_by_id(&self) -> &BTreeMap<u32, signal::Signal> {
self.signal.signals_by_id()
}
pub fn signal_types_by_uuid(&self) -> &FnvHashMap<Uuid, signal::Type> {
self.signal.types_by_uuid()
}
pub fn list_changes_by_time(
&self,
desired_time: Range<recording::Time>,
f: &mut dyn FnMut(&signal::ListStateChangesRow),
) {
self.signal.list_changes_by_time(desired_time, f)
}
pub fn update_signals(
&mut self,
when: Range<recording::Time>,
signals: &[u32],
states: &[u16],
) -> Result<(), base::Error> {
self.signal.update_signals(when, signals, states)
}
}
/// Pragmas for full database integrity.
///
/// These are `pub` so that the `moonfire-nvr sql` command can pass to the SQLite3 binary with
/// `-cmd`.
pub static INTEGRITY_PRAGMAS: [&str; 3] = [
// Enforce foreign keys. This is on by default with --features=bundled (as rusqlite
// compiles the SQLite3 amalgamation with -DSQLITE_DEFAULT_FOREIGN_KEYS=1). Ensure it's
// always on. Note that our foreign keys are immediate rather than deferred, so we have to
// be careful about the order of operations during the upgrade.
"pragma foreign_keys = on",
// Make the database actually durable.
"pragma fullfsync = on",
"pragma synchronous = 3",
];
/// Sets pragmas for full database integrity.
pub(crate) fn set_integrity_pragmas(conn: &mut rusqlite::Connection) -> Result<(), Error> {
for pragma in INTEGRITY_PRAGMAS {
conn.execute(pragma, params![])?;
}
Ok(())
}
pub(crate) fn check_sqlite_version() -> Result<(), Error> {
// SQLite version 3.8.2 introduced the "without rowid" syntax used in the schema.
// https://www.sqlite.org/withoutrowid.html
if rusqlite::version_number() < 3008002 {
bail!(
FailedPrecondition,
msg(
"SQLite version {} is too old; need at least 3.8.2",
rusqlite::version()
),
);
}
Ok(())
}
/// Initializes a database.
/// Note this doesn't set journal options, so that it can be used on in-memory databases for
/// test code.
pub fn init(conn: &mut rusqlite::Connection) -> Result<(), Error> {
check_sqlite_version()?;
set_integrity_pragmas(conn)?;
let tx = conn.transaction()?;
tx.execute_batch(include_str!("schema.sql"))
.map_err(|e| err!(e, msg("unable to create database schema")))?;
{
let uuid = ::uuid::Uuid::new_v4();
let uuid_bytes = &uuid.as_bytes()[..];
tx.execute("insert into meta (uuid) values (?)", params![uuid_bytes])?;
}
tx.commit()?;
Ok(())
}
/// Gets the schema version from the given database connection.
/// A fully initialized database will return `Ok(Some(schema_version))` where `schema_version` is
/// an integer that can be compared to `EXPECTED_SCHEMA_VERSION`. An empty database will return
/// `Ok(None)`. A partially initialized database (in particular, one without a version row) will
/// return some error.
pub fn get_schema_version(conn: &rusqlite::Connection) -> Result<Option<i32>, Error> {
let ver_tables: i32 = conn.query_row_and_then(
"select count(*) from sqlite_master where name = 'version'",
params![],
|row| row.get(0),
)?;
if ver_tables == 0 {
return Ok(None);
}
Ok(Some(conn.query_row_and_then(
"select max(id) from version",
params![],
|row| row.get(0),
)?))
}
/// Returns the UUID associated with the current system boot, if available.
fn get_boot_uuid() -> Result<Option<Uuid>, Error> {
if cfg!(target_os = "linux") {
let boot_id = std::fs::read_to_string("/proc/sys/kernel/random/boot_id")?;
Ok(Some(Uuid::parse_str(boot_id.trim_end()).map_err(|e| {
err!(Internal, msg("boot_id is not a valid uuid"), source(e))
})?))
} else {
Ok(None) // don't complain about lack of platform support; just return None.
}
}
/// Checks that the schema version in the given database is as expected.
pub(crate) fn check_schema_version(conn: &rusqlite::Connection) -> Result<(), Error> {
let Some(ver) = get_schema_version(conn)? else {
bail!(
FailedPrecondition,
msg("no such table: version.\n\n\
If you have created an empty database by hand, delete it and use `nvr init` \
instead, as noted in the installation instructions: \
<https://github.com/scottlamb/moonfire-nvr/blob/master/guide/install.md>\n\n\
If you are starting from a database that predates schema versioning, see \
<https://github.com/scottlamb/moonfire-nvr/blob/master/guide/schema.md>."),
)
};
match ver.cmp(&EXPECTED_SCHEMA_VERSION) {
std::cmp::Ordering::Less => bail!(
FailedPrecondition,
msg(
"database schema version {ver} is too old (expected {EXPECTED_SCHEMA_VERSION}); \
see upgrade instructions in guide/upgrade.md"
),
),
std::cmp::Ordering::Equal => Ok(()),
std::cmp::Ordering::Greater => bail!(
FailedPrecondition,
msg(
"database schema version {ver} is too new (expected {EXPECTED_SCHEMA_VERSION}); \
must use a newer binary to match"
),
),
}
}
/// The recording database. Abstracts away SQLite queries. Also maintains in-memory state
/// (loaded on startup, and updated on successful commit) to avoid expensive scans over the
/// recording table on common queries.
pub struct Database<C: Clocks + Clone = clock::RealClocks> {
/// This is wrapped in an `Option` to allow the `Drop` implementation and `close` to coexist.
db: Option<Mutex<LockedDatabase>>,
/// This is kept separately from the `LockedDatabase` to allow the `lock()` operation itself to
/// access it. It doesn't need a `Mutex` anyway; it's `Sync`, and all operations work on
/// `&self`.
clocks: C,
}
impl<C: Clocks + Clone> Drop for Database<C> {
fn drop(&mut self) {
if ::std::thread::panicking() {
return; // don't flush while panicking.
}
if let Some(m) = self.db.take() {
if let Err(e) = m.into_inner().unwrap().flush(&self.clocks, "drop") {
error!(err = %e.chain(), "final database flush failed");
}
}
}
}
// Helpers for Database::lock(). Closures don't implement Fn.
fn acquisition() -> &'static str {
"database lock acquisition"
}
fn operation() -> &'static str {
"database operation"
}
impl<C: Clocks + Clone> Database<C> {
/// Creates the database from a caller-supplied SQLite connection.
pub fn new(
clocks: C,
mut conn: rusqlite::Connection,
read_write: bool,
) -> Result<Database<C>, Error> {
check_sqlite_version()?;
set_integrity_pragmas(&mut conn)?;
check_schema_version(&conn)?;
// Note: the meta check comes after the version check to improve the error message when
// trying to open a version 0 or version 1 database (which lacked the meta table).
let (db_uuid, config) = raw::read_meta(&conn)?;
let open_monotonic = recording::Time::new(clocks.monotonic());
let open = if read_write {
let real = recording::Time::new(clocks.realtime());
let mut stmt = conn
.prepare(" insert into open (uuid, start_time_90k, boot_uuid) values (?, ?, ?)")?;
let open_uuid = SqlUuid(Uuid::new_v4());
let boot_uuid = match get_boot_uuid() {
Err(e) => {
warn!(err = %e.chain(), "unable to get boot uuid");
None
}
Ok(id) => id.map(SqlUuid),
};
stmt.execute(params![open_uuid, real.0, boot_uuid])?;
let id = conn.last_insert_rowid() as u32;
Some(Open {
id,
uuid: open_uuid.0,
})
} else {
None
};
let auth = auth::State::init(&conn)?;
let signal = signal::State::init(&conn, &config)?;
let db = Database {
db: Some(Mutex::new(LockedDatabase {
conn,
uuid: db_uuid,
flush_count: 0,
open,
open_monotonic,
auth,
signal,
sample_file_dirs_by_id: BTreeMap::new(),
cameras_by_id: BTreeMap::new(),
cameras_by_uuid: BTreeMap::new(),
streams_by_id: BTreeMap::new(),
video_sample_entries_by_id: BTreeMap::new(),
video_index_cache: RefCell::new(LinkedHashMap::with_capacity_and_hasher(
VIDEO_INDEX_CACHE_LEN + 1,
Default::default(),
)),
on_flush: Vec::new(),
})),
clocks,
};
{
let l = &mut *db.lock();
l.init_video_sample_entries()?;
l.init_sample_file_dirs()?;
l.init_cameras()?;
l.init_streams()?;
for (&stream_id, ref mut stream) in &mut l.streams_by_id {
// TODO: we could use one thread per stream if we had multiple db conns.
let camera = l.cameras_by_id.get(&stream.camera_id).unwrap();
init_recordings(&mut l.conn, stream_id, camera, stream)?;
}
}
Ok(db)
}
#[inline(always)]
pub fn clocks(&self) -> C {
self.clocks.clone()
}
/// Locks the database; the returned reference is the only way to perform (read or write)
/// operations.
pub fn lock(&self) -> DatabaseGuard<C> {
let timer = clock::TimerGuard::new(&self.clocks, acquisition);
let db = self.db.as_ref().unwrap().lock().unwrap();
drop(timer);
let _timer = clock::TimerGuard::<C, &'static str, fn() -> &'static str>::new(
&self.clocks,
operation,
);
DatabaseGuard {
clocks: &self.clocks,
db,
_timer,
}
}
/// For testing: closes the database (without flushing) and returns the connection.
/// This allows verification that a newly opened database is in an acceptable state.
#[cfg(test)]
fn close(mut self) -> rusqlite::Connection {
self.db.take().unwrap().into_inner().unwrap().conn
}
}
/// Reference to a locked database returned by [Database::lock].
pub struct DatabaseGuard<'db, C: Clocks> {
clocks: &'db C,
db: MutexGuard<'db, LockedDatabase>,
_timer: clock::TimerGuard<'db, C, &'static str, fn() -> &'static str>,
}
impl<'db, C: Clocks + Clone> DatabaseGuard<'db, C> {
/// Tries to flush unwritten changes from the stream directories.
///
/// * commits any recordings added with `add_recording` that have since been marked as
/// synced.
/// * moves old recordings to the garbage table as requested by `delete_oldest_recordings`.
/// * removes entries from the garbage table as requested by `mark_sample_files_deleted`.
///
/// On success, for each affected sample file directory with a flush watcher set, sends a
/// `Flush` event.
pub(crate) fn flush(&mut self, reason: &str) -> Result<(), Error> {
self.db.flush(self.clocks, reason)
}
}
impl<'db, C: Clocks + Clone> ::std::ops::Deref for DatabaseGuard<'db, C> {
type Target = LockedDatabase;
fn deref(&self) -> &LockedDatabase {
&self.db
}
}
impl<'db, C: Clocks + Clone> ::std::ops::DerefMut for DatabaseGuard<'db, C> {
fn deref_mut(&mut self) -> &mut LockedDatabase {
&mut self.db
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate::recording::{self, TIME_UNITS_PER_SEC};
use crate::testutil;
use base::clock;
use rusqlite::Connection;
use url::Url;
use uuid::Uuid;
fn setup_conn() -> Connection {
let mut conn = Connection::open_in_memory().unwrap();
super::init(&mut conn).unwrap();
conn
}
fn assert_no_recordings(db: &Database, uuid: Uuid) {
let mut rows = 0;
let mut camera_id = -1;
{
let db = db.lock();
for row in db.cameras_by_id().values() {
rows += 1;
camera_id = row.id;
assert_eq!(uuid, row.uuid);
assert_eq!(
"http://test-camera/",
row.config.onvif_base_url.as_ref().unwrap().as_str()
);
assert_eq!("foo", &row.config.username);
assert_eq!("bar", &row.config.password);
//assert_eq!("/main", row.main_rtsp_url);
//assert_eq!("/sub", row.sub_rtsp_url);
//assert_eq!(42, row.retain_bytes);
//assert_eq!(None, row.range);
//assert_eq!(recording::Duration(0), row.duration);
//assert_eq!(0, row.sample_file_bytes);
}
}
assert_eq!(1, rows);
let stream_id = camera_id; // TODO
rows = 0;
{
let db = db.lock();
let all_time = recording::Time(i64::min_value())..recording::Time(i64::max_value());
db.list_recordings_by_time(stream_id, all_time, &mut |_row| {
rows += 1;
Ok(())
})
.unwrap();
}
assert_eq!(0, rows);
}
fn assert_single_recording(db: &Database, stream_id: i32, r: &RecordingToInsert) {
{
let db = db.lock();
let stream = db.streams_by_id().get(&stream_id).unwrap();
let dur = recording::Duration(r.wall_duration_90k as i64);
assert_eq!(Some(r.start..r.start + dur), stream.range);
assert_eq!(r.sample_file_bytes as i64, stream.sample_file_bytes);
assert_eq!(dur, stream.duration);
db.cameras_by_id().get(&stream.camera_id).unwrap();
}
// TODO(slamb): test that the days logic works correctly.
let mut rows = 0;
let mut recording_id = None;
{
let db = db.lock();
let all_time = recording::Time(i64::min_value())..recording::Time(i64::max_value());
db.list_recordings_by_time(stream_id, all_time, &mut |row| {
rows += 1;
recording_id = Some(row.id);
assert_eq!(r.start, row.start);
assert_eq!(r.wall_duration_90k, row.wall_duration_90k);
assert_eq!(r.video_samples, row.video_samples);
assert_eq!(r.video_sync_samples, row.video_sync_samples);
assert_eq!(r.sample_file_bytes, row.sample_file_bytes);
let vse = db
.video_sample_entries_by_id()
.get(&row.video_sample_entry_id)
.unwrap();
assert_eq!(vse.rfc6381_codec, "avc1.4d0029");
Ok(())
})
.unwrap();
}
assert_eq!(1, rows);
rows = 0;
raw::list_oldest_recordings(
&db.lock().conn,
CompositeId::new(stream_id, 0),
&mut |row| {
rows += 1;
assert_eq!(recording_id, Some(row.id));
assert_eq!(r.start, row.start);
assert_eq!(r.wall_duration_90k, row.wall_duration_90k);
assert_eq!(r.sample_file_bytes, row.sample_file_bytes);
true
},
)
.unwrap();
assert_eq!(1, rows);
// TODO: list_aggregated_recordings.
// TODO: with_recording_playback.
}
#[test]
fn test_no_meta_or_version() {
testutil::init();
let e = Database::new(
clock::RealClocks {},
Connection::open_in_memory().unwrap(),
false,
)
.err()
.unwrap();
assert!(e.msg().unwrap().starts_with("no such table"), "{}", e);
}
#[test]
fn test_version_too_old() {
testutil::init();
let c = setup_conn();
c.execute_batch("delete from version; insert into version values (6, 0, '');")
.unwrap();
let e = Database::new(clock::RealClocks {}, c, false).err().unwrap();
assert!(
e.msg()
.unwrap()
.starts_with("database schema version 6 is too old (expected 7)"),
"got: {e:?}"
);
}
#[test]
fn test_version_too_new() {
testutil::init();
let c = setup_conn();
c.execute_batch("delete from version; insert into version values (8, 0, '');")
.unwrap();
let e = Database::new(clock::RealClocks {}, c, false).err().unwrap();
assert!(
e.msg()
.unwrap()
.starts_with("database schema version 8 is too new (expected 7)"),
"got: {e:?}"
);
}
/// Basic test of running some queries on a fresh database.
#[test]
fn test_fresh_db() {
testutil::init();
let conn = setup_conn();
let db = Database::new(clock::RealClocks {}, conn, true).unwrap();
let db = db.lock();
assert_eq!(0, db.cameras_by_id().values().count());
}
/// Basic test of the full lifecycle of recording. Does not exercise error cases.
#[test]
fn test_full_lifecycle() {
testutil::init();
let conn = setup_conn();
let db = Database::new(clock::RealClocks {}, conn, true).unwrap();
let tmpdir = tempfile::Builder::new()
.prefix("moonfire-nvr-test")
.tempdir()
.unwrap();
let path = tmpdir.path().to_owned();
let sample_file_dir_id = { db.lock() }.add_sample_file_dir(path).unwrap();
let mut c = CameraChange {
short_name: "testcam".to_owned(),
config: crate::json::CameraConfig {
description: "".to_owned(),
onvif_base_url: Some(Url::parse("http://test-camera/").unwrap()),
username: "foo".to_owned(),
password: "bar".to_owned(),
..Default::default()
},
streams: [
StreamChange {
sample_file_dir_id: Some(sample_file_dir_id),
config: crate::json::StreamConfig {
url: Some(Url::parse("rtsp://test-camera/main").unwrap()),
mode: crate::json::STREAM_MODE_RECORD.to_owned(),
flush_if_sec: 1,
..Default::default()
},
},
StreamChange {
sample_file_dir_id: Some(sample_file_dir_id),
config: crate::json::StreamConfig {
url: Some(Url::parse("rtsp://test-camera/sub").unwrap()),
mode: crate::json::STREAM_MODE_RECORD.to_owned(),
flush_if_sec: 1,
..Default::default()
},
},
StreamChange::default(),
],
};
let camera_id = db.lock().add_camera(c.clone()).unwrap();
let (main_stream_id, sub_stream_id);
{
let mut l = db.lock();
{
let c = l.cameras_by_id().get(&camera_id).unwrap();
main_stream_id = c.streams[0].unwrap();
sub_stream_id = c.streams[1].unwrap();
}
l.update_retention(&[super::RetentionChange {
stream_id: main_stream_id,
new_record: true,
new_limit: 42,
}])
.unwrap();
{
let main = l.streams_by_id().get(&main_stream_id).unwrap();
assert_eq!(main.config.mode, crate::json::STREAM_MODE_RECORD);
assert_eq!(main.config.retain_bytes, 42);
assert_eq!(main.config.flush_if_sec, 1);
}
assert_eq!(
l.streams_by_id()
.get(&sub_stream_id)
.unwrap()
.config
.flush_if_sec,
1
);
c.streams[1].config.flush_if_sec = 2;
l.update_camera(camera_id, c).unwrap();
assert_eq!(
l.streams_by_id()
.get(&sub_stream_id)
.unwrap()
.config
.flush_if_sec,
2
);
}
let camera_uuid = { db.lock().cameras_by_id().get(&camera_id).unwrap().uuid };
assert_no_recordings(&db, camera_uuid);
assert_eq!(
db.lock()
.streams_by_id()
.get(&main_stream_id)
.unwrap()
.cum_recordings,
0
);
// Closing and reopening the database should present the same contents.
let conn = db.close();
let db = Database::new(clock::RealClocks {}, conn, true).unwrap();
assert_eq!(
db.lock()
.streams_by_id()
.get(&sub_stream_id)
.unwrap()
.config
.flush_if_sec,
2
);
assert_no_recordings(&db, camera_uuid);
assert_eq!(
db.lock()
.streams_by_id()
.get(&main_stream_id)
.unwrap()
.cum_recordings,
0
);
// TODO: assert_eq!(db.lock().list_garbage(sample_file_dir_id).unwrap(), &[]);
let vse_id = db
.lock()
.insert_video_sample_entry(VideoSampleEntryToInsert {
width: 1920,
height: 1080,
pasp_h_spacing: 1,
pasp_v_spacing: 1,
data: include_bytes!("testdata/avc1").to_vec(),
rfc6381_codec: "avc1.4d0029".to_owned(),
})
.unwrap();
assert!(vse_id > 0, "vse_id = {vse_id}");
// Inserting a recording should succeed and advance the next recording id.
let start = recording::Time(1430006400 * TIME_UNITS_PER_SEC);
let recording = RecordingToInsert {
sample_file_bytes: 42,
run_offset: 0,
flags: 0,
start,
prev_media_duration: recording::Duration(0),
prev_runs: 0,
wall_duration_90k: TIME_UNITS_PER_SEC.try_into().unwrap(),
media_duration_90k: TIME_UNITS_PER_SEC.try_into().unwrap(),
local_time_delta: recording::Duration(0),
video_samples: 1,
video_sync_samples: 1,
video_sample_entry_id: vse_id,
video_index: [0u8; 100].to_vec(),
sample_file_blake3: None,
end_reason: None,
};
let id = {
let mut db = db.lock();
let (id, _) = db.add_recording(main_stream_id, recording.clone()).unwrap();
db.mark_synced(id).unwrap();
db.flush("add test").unwrap();
id
};
assert_eq!(
db.lock()
.streams_by_id()
.get(&main_stream_id)
.unwrap()
.cum_recordings,
1
);
// Queries should return the correct result (with caches update on insert).
assert_single_recording(&db, main_stream_id, &recording);
// Queries on a fresh database should return the correct result (with caches populated from
// existing database contents rather than built on insert).
let conn = db.close();
let db = Database::new(clock::RealClocks {}, conn, true).unwrap();
assert_single_recording(&db, main_stream_id, &recording);
// Deleting a recording should succeed, update the min/max times, and mark it as garbage.
{
let mut db = db.lock();
let mut n = 0;
db.delete_oldest_recordings(main_stream_id, &mut |_| {
n += 1;
true
})
.unwrap();
assert_eq!(n, 1);
{
let s = db.streams_by_id().get(&main_stream_id).unwrap();
assert_eq!(s.sample_file_bytes, 42);
assert_eq!(s.bytes_to_delete, 42);
}
n = 0;
// A second run
db.delete_oldest_recordings(main_stream_id, &mut |_| {
n += 1;
true
})
.unwrap();
assert_eq!(n, 0);
assert_eq!(
db.streams_by_id()
.get(&main_stream_id)
.unwrap()
.bytes_to_delete,
42
);
db.flush("delete test").unwrap();
let s = db.streams_by_id().get(&main_stream_id).unwrap();
assert_eq!(s.sample_file_bytes, 0);
assert_eq!(s.bytes_to_delete, 0);
}
assert_no_recordings(&db, camera_uuid);
let g: Vec<_> = db
.lock()
.sample_file_dirs_by_id()
.get(&sample_file_dir_id)
.unwrap()
.garbage_needs_unlink
.iter()
.copied()
.collect();
assert_eq!(&g, &[id]);
let g: Vec<_> = db
.lock()
.sample_file_dirs_by_id()
.get(&sample_file_dir_id)
.unwrap()
.garbage_unlinked
.iter()
.copied()
.collect();
assert_eq!(&g, &[]);
}
#[test]
fn round_up() {
assert_eq!(super::round_up(0), 0);
assert_eq!(super::round_up(8_191), 8_192);
assert_eq!(super::round_up(8_192), 8_192);
assert_eq!(super::round_up(8_193), 12_288);
}
}
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