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| author | Howard Chu <hyc@openldap.org> | 2018-06-11 10:12:03 +0100 |
|---|---|---|
| committer | Howard Chu <hyc@symas.com> | 2022-06-03 16:45:49 +0100 |
| commit | 4e7586c9e41689b116108b806ab322b30f771082 (patch) | |
| tree | 2a305e3f8f234d6b46663b39da0d55d2d55855d7 | |
| parent | Preliminary raw partition support (diff) | |
| download | monero-4e7586c9e41689b116108b806ab322b30f771082.tar.xz | |
More RAWPART support
Use mmap to read and initialize the meta pages, raw device
may not support read/write syscalls.
| -rw-r--r-- | external/db_drivers/liblmdb/mdb.c | 44 |
1 files changed, 43 insertions, 1 deletions
diff --git a/external/db_drivers/liblmdb/mdb.c b/external/db_drivers/liblmdb/mdb.c index 0d01d2959..52ad844e9 100644 --- a/external/db_drivers/liblmdb/mdb.c +++ b/external/db_drivers/liblmdb/mdb.c @@ -4040,6 +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 @@ -4056,6 +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. */ @@ -4152,6 +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; @@ -5460,8 +5499,11 @@ mdb_env_open(MDB_env *env, const char *path, unsigned int flags, mdb_mode_t mode if (rc) return ErrCode(); flags &= ~MDB_RAWPART; - if (S_ISBLK(st.st_mode)) + if (S_ISBLK(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 */ |