From 0fda45c68b6a257ee26e9f9813cce8962f94e2fd Mon Sep 17 00:00:00 2001 From: Laurent Bercot Date: Wed, 30 Jun 2021 01:39:43 +0000 Subject: New db design with mmap() Signed-off-by: Laurent Bercot --- src/include-local/db.h | 85 ++++++++++------------- src/libs6rcd/s6rc_db_free.c | 14 ++-- src/libs6rcd/s6rc_db_load.c | 129 +++++++++++++++++++++++++++++++++++ src/libs6rcd/s6rc_db_read.c | 131 ------------------------------------ src/libs6rcd/s6rc_db_read_hash.c | 15 ----- src/libs6rcd/s6rc_service_common.c | 17 ++--- src/libs6rcd/s6rc_service_resolve.c | 12 ++-- 7 files changed, 183 insertions(+), 220 deletions(-) create mode 100644 src/libs6rcd/s6rc_db_load.c delete mode 100644 src/libs6rcd/s6rc_db_read.c delete mode 100644 src/libs6rcd/s6rc_db_read_hash.c (limited to 'src') diff --git a/src/include-local/db.h b/src/include-local/db.h index a937e7a..be7ef20 100644 --- a/src/include-local/db.h +++ b/src/include-local/db.h @@ -5,46 +5,33 @@ #include +#include - /* Service types and db representation in memory */ - -#define S6RC_INSTANCES_MAX 0xffffffU -#define S6RC_INSTANCEPARAM_MAXLEN 0xffffffU +#define S6RC_ARGV_MAX 0x00ffffffu +#define S6RC_INSTANCES_MAX 0x00ffffffu +#define S6RC_INSTANCEPARAM_MAXLEN 0x00ffffffu -typedef enum s6rc_stype_e s6rc_stype_t, *s6rc_stype_t_ref ; -enum s6rc_stype_e -{ - S6RC_STYPE_LONGRUN, - S6RC_STYPE_ONESHOT, - S6RC_STYPE_EXTERNAL, - S6RC_STYPE_BUNDLE, - S6RC_STYPE_VIRTUAL, - S6RC_STYPE_PHAIL -} ; + /* Service types and db representation in memory */ +#define S6RC_STYPE_LONGRUN 0 +#define S6RC_STYPE_ONESHOT 1 +#define S6RC_STYPE_EXTERNAL 2 +#define S6RC_STYPE_BUNDLE 3 +#define S6RC_STYPE_VIRTUAL 4 +#define S6RC_STYPE_N 5 -typedef struct s6rc_baseid_s s6rc_baseid_t, *s6rc_baseid_t_ref ; -struct s6rc_baseid_s -{ - uint32_t i ; - s6rc_stype_t stype ; -} ; +typedef uint32_t s6rc_id_t, *s6rc_id_t_ref ; -typedef struct s6rc_id_s s6rc_id_t, *s6rc_id_t_ref ; -struct s6rc_id_s -{ - char const *param ; - s6rc_baseid_t baseid ; -} ; +#define stype(sid) ((sid) >> 28) +#define snum(sid) ((sid) & 0x0fffffffu) typedef struct s6rc_common_s s6rc_common_t, *s6rc_common_t_ref ; struct s6rc_common_s { uint32_t name ; + uint32_t flags ; uint32_t deps[2] ; uint32_t ndeps[2] ; - uint32_t flag_essential : 1 ; - uint32_t flags : 31 ; } ; typedef struct s6rc_atomic_s s6rc_atomic_t, *s6rc_atomic_t_ref ; @@ -58,7 +45,6 @@ typedef struct s6rc_oneshot_s s6rc_oneshot_t, *s6rc_oneshot_t_ref ; struct s6rc_oneshot_s { s6rc_atomic_t satomic ; - uint32_t argc[2] ; uint32_t argv[2] ; } ; @@ -66,9 +52,9 @@ typedef struct s6rc_longrun_s s6rc_longrun_t, *s6rc_longrun_t_ref ; struct s6rc_longrun_s { s6rc_atomic_t satomic ; - s6rc_sid_t consumer ; uint32_t nproducers ; uint32_t producers ; + s6rc_id_t consumer ; } ; typedef struct s6rc_external_s s6rc_external_t, *s6rc_external_t_ref ; @@ -85,30 +71,31 @@ struct s6rc_bundle_s uint32_t contents ; } ; -typedef struct s6rc_deptype_s s6rc_deptype_t, *s6rc_deptype_t_ref ; -struct s6rc_deptype_s -{ - uint8_t passive : 1 ; - uint8_t soft : 1 ; - uint8_t loose : 1 ; -} ; +#define s6rc_deptype_passive(dep) ((dep) & 0x01u) +#define s6rc_deptype_soft(dep) ((dep) & 0x02u) +#define s6rc_deptype_loose(dep) ((dep) & 0x04u) typedef struct s6rc_db_s s6rc_db_t, *s6rc_db_t_ref ; struct s6rc_db_s { - uint32_t n[STYPE_PHAIL << 1] ; - s6rc_longrun_t *longruns ; - s6rc_oneshot_t *oneshots ; - s6rc_external_t *externals ; - s6rc_bundle_t *bundles ; - s6rc_bundle_t *virtuals ; - s6rc_baseid_t *deps[2] ; - s6rc_deptype_t *deptypes[2] ; - s6rc_baseid_t *producers ; - char const **argvs ; - char *storage ; + char const *map ; + size_t size ; + uint32_t const *n ; + s6rc_longrun_t const *longruns ; + s6rc_oneshot_t const *oneshots ; + s6rc_external_t const *externals ; + s6rc_bundle_t const *bundles ; + s6rc_bundle_t const *virtuals ; + s6rc_id_t const *deps[2] ; + uint8_t const *deptypes[2] ; + s6rc_id_t const *producers ; + char const *storage ; + char const **argvs ; /* alloced */ } ; +#define S6RC_DB_ZERO = { .map = 0, .len = 0 } + -extern s6rc_common_t const *s6rc_service_common (s6rc_db_t const *, s6rc_sid_t const *) ; +extern int s6rc_service_resolve (cdb_t *, char const *, s6rc_id_t *, char const **) ; +extern s6rc_common_t const *s6rc_service_common (s6rc_db_t const *, s6rc_id_t const *) ; #endif diff --git a/src/libs6rcd/s6rc_db_free.c b/src/libs6rcd/s6rc_db_free.c index b8eb54e..07f4ccd 100644 --- a/src/libs6rcd/s6rc_db_free.c +++ b/src/libs6rcd/s6rc_db_free.c @@ -1,18 +1,16 @@ /* ISC license. */ +#include + #include #include "db.h" void s6rc_db_free (s6rc_db_t *db) { - alloc_free(db->storage) ; + int e = errno ; alloc_free(db->argvs) ; - alloc_free(db->producers) ; - alloc_free(db->deptypes[0]) ; - alloc_free(db->deps[0]) ; - alloc_free(db->bundles) ; - alloc_free(db->externals) ; - alloc_free(db->oneshots) ; - alloc_free(db->longruns) ; + munmap(db->map, db->size) ; + db->map = 0 ; + errno = e ; } diff --git a/src/libs6rcd/s6rc_db_load.c b/src/libs6rcd/s6rc_db_load.c new file mode 100644 index 0000000..e42afc9 --- /dev/null +++ b/src/libs6rcd/s6rc_db_load.c @@ -0,0 +1,129 @@ +/* ISC license. */ + +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +#include "db.h" + +#include + +static int gethu32 (buffer *b, SHA256Schedule *ctx, uint32_t *n) +{ + if (buffer_get(b, (char *)n, 4) < 4) return 0 ; + sha256_update(ctx, (char *)n, 4) ; + return 1 ; +} + +int s6rc_db_load (char const *dir, s6rc_db_t *db) +{ + SHA256Schedule ctx = SHA256_INIT() ; + uint32_t ntotal, ndeps, nproducers, storagelen, nargv ; + size_t len = strlen(dir) ; + buffer b ; + int fd ; + char buf[4096] ; + char fn[len + 10] ; + memcpy(fn, dir, len) ; + memcpy(fn + len, "/db_nomap", 10) ; + fd = openc_read(fn) ; + if (fd == -1) return 0 ; + buffer_init(&b, &buffer_read, fd, buf, 4096) ; + { + uint32_t canary ; + if (!gethu32(&b, &canary)) goto err0 ; + if (canary != 0x11223344u) { errno = EILSEQ ; goto err0 ; } + } + if (!gethu32(&b, &ctx, &ntotal)) goto err0 ; + if (!gethu32(&b, &ctx, &ndeps)) goto err0 ; + if (!gethu32(&b, &ctx, &nproducers)) goto err0 ; + if (!gethu32(&b, &ctx, &storagelen)) goto err0 ; + if (!gethu32(&b, &ctx, &nargv)) goto err0 ; + if (nargv > S6RC_ARGV_MAX) goto eproto0 ; + + { + uint32_t argvs[nargv ? nargv : 1] ; + if (buffer_get(&b, (char *)argvs, nargv * 4) < nargv * 4) goto err0 ; + { + char c ; + ssize_t r = buffer_get(&b, &c, 1) ; + if (r < 0) goto err0 ; + if (r) goto eproto0 ; + } + fd_close(fd) ; + sha256_update(&ctx, (char *)argvs, nargv * 4) ; + memcpy(fn + len, "/db", 4) ; + + { + struct stat st ; + void *map ; + fd = openc_read(fn) ; + if (fd == -1) return 0 ; + if (fstat(fd, &st) == -1) goto err0 ; + if (!S_ISREG(st.st_mode)) goto eproto0 ; + if (st.st_size < 8 * S6RC_STYPE_N) goto eproto0 ; + map = mmap(0, st.st_size, PROT_READ, MAP_SHARED, fd, 0) ; + if (map == MAP_FAILED) goto err0 ; + fd_close(fd) ; + db->size = st.st_size ; + db->map = map ; + } + db->n = (uint32_t const *)db->map ; + if (ntotal != db->n[0] + db->n[1] + db->n[2] + db->n[3] + db->n[4] + db->n[5] + db->n[6] + db->n[7] + db->n[8] + db->n[9]) goto eproto1 ; + + { + ssize_t r ; + memcpy(fn + len, "/hash", 6) ; + r = openreadnclose(fn, buf+32, 33) ; + if (r == 33) goto eproto1 ; + if (r < 32) goto err1 ; + sha256_update(&ctx, db->map, db->size) ; + sha256_final(&ctx, buf) ; + if (memcmp(buf, buf+32, 32)) goto eproto1 ; + } + + db->longruns = (s6rc_longrun_t const *)(db->map + 4 * 2 * S6RC_STYPE_N) ; + db->oneshots = (s6rc_oneshot_t const *)(db->longruns + db->n[S6RC_STYPE_LONGRUN] + db->n[S6RC_STYPE_N + S6RC_STYPE_LONGRUN]) ; + db->externals = (s6rc_external_t const *)(db->oneshots + db->n[S6RC_STYPE_ONESHOT] + db->n[S6RC_STYPE_N + S6RC_STYPE_ONESHOT]) ; + db->bundles = (s6rc_bundle_t const *)(db->externals + db->n[S6RC_STYPE_EXTERNAL] + db->n[S6RC_STYPE_N + S6RC_STYPE_EXTERNAL]) ; + db->virtuals = (s6rc_bundle_t const *)(db->bundles + db->n[S6RC_STYPE_BUNDLE] + db->n[S6RC_STYPE_N + S6RC_STYPE_BUNDLE]) ; + db->deps[0] = (s6rc_id_t const *)(db->virtuals + db->n[S6RC_STYPE_VIRTUAL] + db->n[S6RC_STYPE_N + S6RC_STYPE_VIRTUAL]) ; + db->deps[1] = db->deps[0] + ndeps ; + db->producers = db->deps[1] + ndeps ; + db->deptypes[0] = (uint8_t const *)(db->producers + nproducers) ; + db->deptypes[1] = db->deptypes[0] + ndeps ; + db->storage = (char const *)(db->deptypes[1] + ndeps) ; + if (db->storage + storagelen != db->map + db->size) goto eproto1 ; + + db->argvs = (char const **)alloc(sizeof(char const *) * nargv) ; + if (!db->argvs) goto err1 ; + for (uint32_t i = 0 ; i < nargv ; i++) + db->argvs[i] = argvs[i] ? db->storage + argvs[i] : 0 ; + } + return 1 ; + + eproto1: + errno = EPROTO ; + err1: + { + int e = errno ; + munmap(db->map, db->size) ; + errno = e ; + } + db->map = 0 ; + return 0 ; + + eproto0: + errno = EPROTO ; + err0: + fd_close(fd) ; + return 0 ; +} diff --git a/src/libs6rcd/s6rc_db_read.c b/src/libs6rcd/s6rc_db_read.c deleted file mode 100644 index 9b60184..0000000 --- a/src/libs6rcd/s6rc_db_read.c +++ /dev/null @@ -1,131 +0,0 @@ -/* ISC license. */ - -#include -#include -#include - -#include -#include -#include -#include - -#include "db.h" - -#include - -static int geth (buffer *b, SHA256Schedule *ctx, char *s, size_t len) -{ - if (buffer_get(b, s, len) < len) return 0 ; - sha256_update(ctx, s, len) ; - return 1 ; -} - -static int readu32 (buffer *b, SHA256Schedule *ctx, uint32_t *x) -{ - char pack[4] ; - if (!geth(b, ctx, pack, 4)) return 0 ; - uint32_unpack_big(pack, x) ; - return 1 ; -} - -static int readdeps (buffer *b, SHA256Schedule *ctx, s6rc_baseid_t *deps, uint32_t ndeps, uint32_t const *dbn) -{ - for (uint32_t i = 0 ; i < (ndeps << 1) ; i++) - { - char pack[5] ; - if (!geth(b, ctx, pack, 5)) return 0 ; - if ((unsigned char)pack[0] >= S6RC_STYPE_PHAIL) return (errno = EPROTO, 0) ; - deps[i].stype = pack[0] ; - uint32_unpack_big(pack + 1, &deps[i].i) ; - } - return 1 ; -} - -int s6rc_db_read_main (char const *dir, s6rc_db_t const *db, char *dbhash) -{ - SHA256Schedule ctx = SHA256_INIT() ; - int fd ; - buffer b ; - size_t len = strlen(dir) ; - uint32_t ndeps, nproducers, nargvs, storagelen ; - char buf[1024] ; - char fn[len + 4] ; - memcpy(fn, dir, len) ; - memcpy(fn + len, "/db", 4) ; - fd = openc_read(fn) ; - if (fd == -1) return 0 ; - buffer_init(&b, &buffer_read, fd, buf, 1024) ; - - { - char banner[S6RC_DB_BANNER_START_LEN] ; - if (!geth(&b, &ctx, banner, S6RC_DB_BANNER_START_LEN)) goto err0 ; - if (memcmp(banner, S6RC_DB_BANNER_START, S6RC_DB_BANNER_START_LEN)) { errno = EPROTO ; goto err0 ; } - } - - { - uint32_t ntotal ; - uint32_t nacc = 0 ; - if (!readu32(&b, &ctx, &ntotal)) goto err0 ; - for (s6rc_stype_t type = 0 ; (type < S6RC_STYPE_PHAIL << 1) ; type++) - { - if (!readu32(&b, &ctx, db->n + type)) goto err0 ; - nacc += db->n[type] ; - } - if (ntotal != nacc) { errno = EPROTO ; goto err0 ; } - } - if (!readu32(&b, &ctx, &ndeps)) goto err0 ; - if (!readu32(&b, &ctx, &nproducers)) goto err0 ; - if (!readu32(&b, &ctx, &nargvs)) goto err0 ; - if (!readu32(&b, &ctx, &storagelen)) goto err0 ; - - db->longruns = alloc(sizeof(s6rc_longrun_t) * (db->n[S6RC_STYPE_LONGRUN] + db->n[S6RC_STYPE_PHAIL + S6RC_STYPE_LONGRUN])) ; - if (!db->longruns) goto err0 ; - db->oneshots = alloc(sizeof(s6rc_oneshot_t) * (db->n[S6RC_STYPE_ONESHOT] + db->n[S6RC_STYPE_PHAIL + S6RC_STYPE_ONESHOT])) ; - if (!db->oneshots) goto err1 ; - db->externals = alloc(sizeof(s6rc_external_t) * (db->n[S6RC_STYPE_EXTERNAL] + db->n[S6RC_STYPE_PHAIL + S6RC_STYPE_EXTERNAL])) ; - if (!db->externals) goto err2 ; - db->bundles = alloc(sizeof(s6rc_bundle_t) * (db->n[S6RC_STYPE_BUNDLE] + db->n[S6RC_STYPE_PHAIL + S6RC_STYPE_BUNDLE] + db->n[S6RC_STYPE_VIRTUAL] + db->n[S6RC_STYPE_PHAIL + S6RC_TYPE_VIRTUAL])) ; - if (!db->bundles) goto err3 ; - db->virtuals = db->bundles + db->n[S6RC_STYPE_BUNDLE] + db->n[S6RC_STYPE_PHAIL + S6RC_STYPE_BUNDLE])) ; - db->deps[0] = alloc(sizeof(s6rc_baseid_t) * (ndeps << 1)) ; - if (!db->deps[0]) goto err4 ; - db->deps[1] = db->deps[0] + ndeps ; - db->deptypes[0] = alloc(sizeof(s6rc_deptype_t) * (ndeps << 1)) ; - if (!db->deptypes[0]) goto err5 ; - db->deptypes[1] = db->deptypes[0] + ndeps ; - db->producers = alloc(sizeof(s6rc_baseid_t) * nproducers) ; - if (!db->producers) goto err6 ; - db->argvs = alloc(sizeof(char const *) * nargvs) ; - if (!db->longruns) goto err7 ; - db->storage = alloc(storagelen) ; - if (!db->storage) goto err8 ; - - if (!geth(&b, &ctx, db->storage, storagelen)) goto err ; - if (!geth(&b, &ctx, db->deptypes[0], sizeof(s6rc_deptype_t) * (ndeps << 1))) goto err ; - if (!readdeps(&b, &ctx, db->deps[0], ndeps, db->n)) goto err ; - - sha256_final(&ctx, dbhash) ; - return 1 ; - - err: - alloc_free(db->storage) ; - err8: - alloc_free(db->argvs) ; - err7: - alloc_free(db->producers) ; - err6: - alloc_free(db->deptypes[0]) ; - err5: - alloc_free(db->deps[0]) ; - err4: - alloc_free(db->bundles) ; - err3: - alloc_free(db->externals) ; - err2: - alloc_free(db->oneshots) ; - err1: - alloc_free(db->longruns) ; - err0: - fd_close(fd) ; - return 0 ; -} diff --git a/src/libs6rcd/s6rc_db_read_hash.c b/src/libs6rcd/s6rc_db_read_hash.c deleted file mode 100644 index f33e657..0000000 --- a/src/libs6rcd/s6rc_db_read_hash.c +++ /dev/null @@ -1,15 +0,0 @@ -/* ISC license. */ - -#include -#include - -#include "db.h" - -int s6rc_db_read_hash (char const *dir, char *dbhash) -{ - size_t len = strlen(dir) ; - char fn[len + 6] ; - memcpy(fn, dir, len) ; - memcpy(fn + len, "/hash", 6) ; - return openreadnclose(fn, dbhash, 32) == 32 ; -} diff --git a/src/libs6rcd/s6rc_service_common.c b/src/libs6rcd/s6rc_service_common.c index 93c6ee3..3361695 100644 --- a/src/libs6rcd/s6rc_service_common.c +++ b/src/libs6rcd/s6rc_service_common.c @@ -1,19 +1,16 @@ /* ISC license. */ -#include - #include "db.h" -s6rc_common_t const *s6rc_service_common (s6rc_db_t const *db, s6rc_sid_t const *id) +s6rc_common_t const *s6rc_service_common (s6rc_db_t const *db, s6rc_id_t const *id) { - uint32_t i = id->i + (id->param ? db->n[id->stype] : 0) ; - switch (id->stype) + switch (stype(id)) { - case STYPE_LONGRUN : return &db->longruns[i].common ; - case STYPE_ONESHOT : return &db->oneshots[i].common ; - case STYPE_EXTERNAL : return &db->externals[i].common ; - case STYPE_BUNDLE : return &db->bundles[i].common ; - case STYPE_VIRTUAL : return &db->virtuals[i].common ; + case STYPE_LONGRUN : return &db->longruns[snum(id)].common ; + case STYPE_ONESHOT : return &db->oneshots[snum(id)].common ; + case STYPE_EXTERNAL : return &db->externals[snum(id)].common ; + case STYPE_BUNDLE : return &db->bundles[snum(id)].common ; + case STYPE_VIRTUAL : return &db->virtuals[snum(id)].common ; default : return 0 ; } } diff --git a/src/libs6rcd/s6rc_service_resolve.c b/src/libs6rcd/s6rc_service_resolve.c index a786542..fe863be 100644 --- a/src/libs6rcd/s6rc_service_resolve.c +++ b/src/libs6rcd/s6rc_service_resolve.c @@ -9,10 +9,10 @@ #include "db.h" -int s6rc_service_resolve (cdb_t *c, s6rc_sid_t *id, char const *s) +int s6rc_service_resolve (cdb_t *c, char const *s, s6rc_id_t *id, char const **param) { size_t len = strlen(s) ; - char const *param = 0 ; + char const *p = 0 ; char pack[5] ; int r = cdb_find(c, s, len) ; if (r < 0) return r ; @@ -23,11 +23,9 @@ int s6rc_service_resolve (cdb_t *c, s6rc_sid_t *id, char const *s) if (at == len - 1) return (errno = EINVAL, -1) ; r = cdb_find(c, s, at + 1) ; if (r <= 0) return r ; - param = s + at + 1 ; + p = s + at + 1 ; } - if (cdb_read(c, pack, 5, cdb_datapos(c)) < 0) return -1 ; - id->stype = pack[0] ; - uint32_unpack_big(pack + 1, &id->i) ; - id->param = param ; + uint32_unpack_big(cdb_datapos(c), id) ; + *param = p ; return 1 ; } -- cgit v1.2.3