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Preliminary raw partition support

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Autodetects that a block device is being used.
This commit is contained in:
Howard Chu 2016-02-21 18:29:40 +00:00 committed by Howard Chu
parent 6e60919e6d
commit 747f5d3594
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GPG Key ID: FD2A70B44AB11BA7
1 changed files with 16 additions and 1 deletions
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17
external/db_drivers/liblmdb/mdb.c vendored
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@ -1473,6 +1473,8 @@ struct MDB_env {
#define MDB_ENV_TXKEY 0x10000000U
/** fdatasync is unreliable */
#define MDB_FSYNCONLY 0x08000000U
/** using a raw block device */
#define MDB_RAWPART 0x04000000U
uint32_t me_flags; /**< @ref mdb_env */
unsigned int me_psize; /**< DB page size, inited from me_os_psize */
unsigned int me_os_psize; /**< OS page size, from #GET_PAGESIZE */
@ -4081,6 +4083,8 @@ 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;
}
@ -4410,7 +4414,7 @@ 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,
@ -5448,6 +5452,17 @@ mdb_env_open(MDB_env *env, const char *path, unsigned int flags, mdb_mode_t mode
if (rc)
goto leave;
#endif
#endif
#ifndef _WIN32
{
struct stat st;
rc = stat(path, &st);
if (rc)
return ErrCode();
flags &= ~MDB_RAWPART;
if (S_ISBLK(st.st_mode))
flags |= MDB_RAWPART | MDB_NOSUBDIR;
}
#endif
flags |= MDB_ENV_ACTIVE; /* tell mdb_env_close0() to clean up */