diff options
Diffstat (limited to 'external/db_drivers/liblmdb/mdb.c')
| -rw-r--r-- | external/db_drivers/liblmdb/mdb.c | 58 |
1 files changed, 56 insertions, 2 deletions
diff --git a/external/db_drivers/liblmdb/mdb.c b/external/db_drivers/liblmdb/mdb.c index 6314d5775..bf60c7013 100644 --- a/external/db_drivers/liblmdb/mdb.c +++ b/external/db_drivers/liblmdb/mdb.c @@ -1467,6 +1467,8 @@ struct MDB_env { #endif /** Failed to update the meta page. Probably an I/O error. */ #define MDB_FATAL_ERROR 0x80000000U + /** using a raw block device */ +#define MDB_RAWPART 0x40000000U /** Some fields are initialized. */ #define MDB_ENV_ACTIVE 0x20000000U /** me_txkey is set */ @@ -4038,6 +4040,8 @@ fail: return rc; } +static int ESECT mdb_env_map(MDB_env *env, void *addr); + /** Read the environment parameters of a DB environment before * mapping it into memory. * @param[in] env the environment handle @@ -4054,6 +4058,31 @@ mdb_env_read_header(MDB_env *env, int prev, MDB_meta *meta) int i, rc, off; enum { Size = sizeof(pbuf) }; + if (env->me_flags & MDB_RAWPART) { +#define VM_ALIGN 0x200000 + env->me_mapsize += VM_ALIGN-1; + env->me_mapsize &= ~(VM_ALIGN-1); + env->me_psize = env->me_os_psize; + rc = mdb_env_map(env, NULL); + if (rc) { + DPRINTF(("mdb_env_map: %s", mdb_strerror(rc))); + return rc; + } + p = (MDB_page *)env->me_map; + for (i=0; i<NUM_METAS; i++) { + if (!F_ISSET(p->mp_flags, P_META)) + return ENOENT; + if (env->me_metas[i]->mm_magic != MDB_MAGIC) + return MDB_INVALID; + if (env->me_metas[i]->mm_version != MDB_DATA_VERSION) + return MDB_VERSION_MISMATCH; + if (i == 0 || env->me_metas[i]->mm_txnid > meta->mm_txnid) + *meta = *env->me_metas[i]; + p = (MDB_page *)((char *)p + env->me_psize); + } + return 0; + } + /* We don't know the page size yet, so use a minimum value. * Read both meta pages so we can use the latest one. */ @@ -4081,6 +4110,8 @@ mdb_env_read_header(MDB_env *env, int prev, MDB_meta *meta) p = (MDB_page *)&pbuf; if (!F_ISSET(p->mp_flags, P_META)) { + if (env->me_flags & MDB_RAWPART) + return ENOENT; DPRINTF(("page %"Yu" not a meta page", p->mp_pgno)); return MDB_INVALID; } @@ -4148,6 +4179,18 @@ mdb_env_init_meta(MDB_env *env, MDB_meta *meta) psize = env->me_psize; + if ((env->me_flags & (MDB_RAWPART|MDB_WRITEMAP)) == (MDB_RAWPART|MDB_WRITEMAP)) { + p = (MDB_page *)env->me_map; + p->mp_pgno = 0; + p->mp_flags = P_META; + *(MDB_meta *)METADATA(p) = *meta; + q = (MDB_page *)((char *)p + psize); + q->mp_pgno = 1; + q->mp_flags = P_META; + *(MDB_meta *)METADATA(q) = *meta; + return 0; + } + p = calloc(NUM_METAS, psize); if (!p) return ENOMEM; @@ -4410,7 +4453,7 @@ mdb_env_map(MDB_env *env, void *addr) int prot = PROT_READ; if (flags & MDB_WRITEMAP) { prot |= PROT_WRITE; - if (ftruncate(env->me_fd, env->me_mapsize) < 0) + if (!(flags & MDB_RAWPART) && ftruncate(env->me_fd, env->me_mapsize) < 0) return ErrCode(); } env->me_map = mmap(addr, env->me_mapsize, prot, MAP_SHARED, @@ -5449,6 +5492,17 @@ mdb_env_open(MDB_env *env, const char *path, unsigned int flags, mdb_mode_t mode goto leave; #endif #endif +#ifndef _WIN32 + { + struct stat st; + flags &= ~MDB_RAWPART; + if (!stat(path, &st) && (S_ISBLK(st.st_mode) || S_ISCHR(st.st_mode))) { + flags |= MDB_RAWPART | MDB_NOSUBDIR; + if (!env->me_mapsize) + env->me_mapsize = DEFAULT_MAPSIZE; + } + } +#endif flags |= MDB_ENV_ACTIVE; /* tell mdb_env_close0() to clean up */ if (flags & MDB_RDONLY) { @@ -7668,7 +7722,7 @@ more: offset *= 4; /* space for 4 more */ break; } - /* FALLTHRU: Big enough MDB_DUPFIXED sub-page */ + /* FALLTHRU *//* Big enough MDB_DUPFIXED sub-page */ case MDB_CURRENT: fp->mp_flags |= P_DIRTY; COPY_PGNO(fp->mp_pgno, mp->mp_pgno); |