#ifdef _WIN32
#include <malloc.h>
#include <windows.h>
+#include <wchar.h> /* get wcscpy() */
/* We use native NT APIs to setup the memory map, so that we can
* let the DB file grow incrementally instead of always preallocating
# define MDB_USE_ROBUST 0
# else
# define MDB_USE_ROBUST 1
+# endif
+#endif /* !MDB_USE_ROBUST */
+
+#if defined(MDB_USE_POSIX_MUTEX) && (MDB_USE_ROBUST)
/* glibc < 2.12 only provided _np API */
# if (defined(__GLIBC__) && GLIBC_VER < 0x02000c) || \
(defined(PTHREAD_MUTEX_ROBUST_NP) && !defined(PTHREAD_MUTEX_ROBUST))
# define pthread_mutexattr_setrobust(attr, flag) pthread_mutexattr_setrobust_np(attr, flag)
# define pthread_mutex_consistent(mutex) pthread_mutex_consistent_np(mutex)
# endif
-# endif
-#endif /* MDB_USE_ROBUST */
+#endif /* MDB_USE_POSIX_MUTEX && MDB_USE_ROBUST */
-#if defined(MDB_OWNERDEAD) && MDB_USE_ROBUST
+#if defined(MDB_OWNERDEAD) && (MDB_USE_ROBUST)
#define MDB_ROBUST_SUPPORTED 1
#endif
#else
void *mm_address; /**< address for fixed mapping */
#endif
- pgno_t mm_mapsize; /**< size of mmap region */
+ mdb_size_t mm_mapsize; /**< size of mmap region */
MDB_db mm_dbs[CORE_DBS]; /**< first is free space, 2nd is main db */
/** The size of pages used in this DB */
#define mm_psize mm_dbs[FREE_DBI].md_pad
* @ingroup internal
* @{
*/
-#define DB_DIRTY 0x01 /**< DB was modified or is DUPSORT data */
+#define DB_DIRTY 0x01 /**< DB was written in this txn */
#define DB_STALE 0x02 /**< Named-DB record is older than txnID */
#define DB_NEW 0x04 /**< Named-DB handle opened in this txn */
#define DB_VALID 0x08 /**< DB handle is valid, see also #MDB_VALID */
#define DB_USRVALID 0x10 /**< As #DB_VALID, but not set for #FREE_DBI */
+#define DB_DUPDATA 0x20 /**< DB is #MDB_DUPSORT data */
/** @} */
/** In write txns, array of cursors for each DB */
MDB_cursor **mt_cursors;
unsigned char mx_dbflag;
} MDB_xcursor;
+ /** Check if there is an inited xcursor, so #XCURSOR_REFRESH() is proper */
+#define XCURSOR_INITED(mc) \
+ ((mc)->mc_xcursor && ((mc)->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED))
+
+ /** Update sub-page pointer, if any, in \b mc->mc_xcursor. Needed
+ * when the node which contains the sub-page may have moved. Called
+ * with \b mp = mc->mc_pg[mc->mc_top], \b ki = mc->mc_ki[mc->mc_top].
+ */
+#define XCURSOR_REFRESH(mc, mp, ki) do { \
+ MDB_page *xr_pg = (mp); \
+ MDB_node *xr_node = NODEPTR(xr_pg, ki); \
+ if ((xr_node->mn_flags & (F_DUPDATA|F_SUBDATA)) == F_DUPDATA) \
+ (mc)->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(xr_node); \
+} while (0)
+
/** State of FreeDB old pages, stored in the MDB_env */
typedef struct MDB_pgstate {
pgno_t *mf_pghead; /**< Reclaimed freeDB pages, or NULL before use */
struct MDB_env {
HANDLE me_fd; /**< The main data file */
HANDLE me_lfd; /**< The lock file */
- HANDLE me_mfd; /**< just for writing the meta pages */
+ HANDLE me_mfd; /**< For writing and syncing the meta pages */
#if defined(MDB_VL32) && defined(_WIN32)
HANDLE me_fmh; /**< File Mapping handle */
#endif
static SECURITY_ATTRIBUTES mdb_all_sa;
static int mdb_sec_inited;
-static int utf8_to_utf16(const char *src, int srcsize, wchar_t **dst, int *dstsize);
+struct MDB_name;
+static int utf8_to_utf16(const char *src, struct MDB_name *dst, int xtra);
#endif
/** Return the library version info. */
pgno, ((MDB_meta *)METADATA(mp))->mm_txnid);
return;
default:
- fprintf(stderr, "Bad page %"Yu" flags 0x%u\n", pgno, mp->mp_flags);
+ fprintf(stderr, "Bad page %"Yu" flags 0x%X\n", pgno, mp->mp_flags);
return;
}
}
if (mc->mc_ki[i] >= NUMKEYS(mc->mc_pg[i]))
printf("ack!\n");
- if (mc->mc_xcursor && (mc->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED)) {
+ if (XCURSOR_INITED(mc)) {
node = NODEPTR(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]);
if (((node->mn_flags & (F_DUPDATA|F_SUBDATA)) == F_DUPDATA) &&
mc->mc_xcursor->mx_cursor.mc_pg[0] != NODEDATA(node)) {
/** Allocate memory for a page.
* Re-use old malloc'd pages first for singletons, otherwise just malloc.
+ * Set #MDB_TXN_ERROR on failure.
*/
static MDB_page *
mdb_page_malloc(MDB_txn *txn, unsigned num)
}
/** Allocate page numbers and memory for writing. Maintain me_pglast,
- * me_pghead and mt_next_pgno.
+ * me_pghead and mt_next_pgno. Set #MDB_TXN_ERROR on failure.
*
* If there are free pages available from older transactions, they
* are re-used first. Otherwise allocate a new page at mt_next_pgno.
np = m2.mc_pg[m2.mc_top];
leaf = NODEPTR(np, m2.mc_ki[m2.mc_top]);
if ((rc = mdb_node_read(&m2, leaf, &data)) != MDB_SUCCESS)
- return rc;
+ goto fail;
idl = (MDB_ID *) data.mv_data;
i = idl[0];
}
/** Touch a page: make it dirty and re-insert into tree with updated pgno.
+ * Set #MDB_TXN_ERROR on failure.
* @param[in] mc cursor pointing to the page to be touched
* @return 0 on success, non-zero on failure.
*/
if (m2 == mc) continue;
if (m2->mc_pg[mc->mc_top] == mp) {
m2->mc_pg[mc->mc_top] = np;
- if ((mc->mc_db->md_flags & MDB_DUPSORT) &&
- IS_LEAF(np) &&
- (m2->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED))
- {
- MDB_node *leaf = NODEPTR(np, m2->mc_ki[mc->mc_top]);
- if ((leaf->mn_flags & (F_DUPDATA|F_SUBDATA)) == F_DUPDATA)
- m2->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(leaf);
- }
+ if (XCURSOR_INITED(m2) && IS_LEAF(np))
+ XCURSOR_REFRESH(m2, np, m2->mc_ki[mc->mc_top]);
}
}
}
len = sizeof(MDB_meta) - off;
off += (char *)mp - env->me_map;
- /* Write to the SYNC fd */
+ /* Write to the SYNC fd unless MDB_NOSYNC/MDB_NOMETASYNC.
+ * (me_mfd goes to the same file as me_fd, but writing to it
+ * also syncs to disk. Avoids a separate fdatasync() call.)
+ */
mfd = (flags & (MDB_NOSYNC|MDB_NOMETASYNC)) ? env->me_fd : env->me_mfd;
#ifdef _WIN32
{
return MDB_SUCCESS;
}
+
+#ifdef _WIN32
+typedef wchar_t mdb_nchar_t;
+# define MDB_NAME(str) L##str
+# define mdb_name_cpy wcscpy
+#else
+/** Character type for file names: char on Unix, wchar_t on Windows */
+typedef char mdb_nchar_t;
+# define MDB_NAME(str) str /**< #mdb_nchar_t[] string literal */
+# define mdb_name_cpy strcpy /**< Copy name (#mdb_nchar_t string) */
+#endif
+
+/** Filename - string of #mdb_nchar_t[] */
+typedef struct MDB_name {
+ int mn_len; /**< Length */
+ int mn_alloced; /**< True if #mn_val was malloced */
+ mdb_nchar_t *mn_val; /**< Contents */
+} MDB_name;
+
+/** Filename suffixes [datafile,lockfile][without,with MDB_NOSUBDIR] */
+static const mdb_nchar_t *const mdb_suffixes[2][2] = {
+ { MDB_NAME("/data.mdb"), MDB_NAME("") },
+ { MDB_NAME("/lock.mdb"), MDB_NAME("-lock") }
+};
+
+#define MDB_SUFFLEN 9 /**< Max string length in #mdb_suffixes[] */
+
+/** Set up filename + scratch area for filename suffix, for opening files.
+ * It should be freed with #mdb_fname_destroy().
+ * On Windows, paths are converted from char *UTF-8 to wchar_t *UTF-16.
+ *
+ * @param[in] path Pathname for #mdb_env_open().
+ * @param[in] envflags Whether a subdir and/or lockfile will be used.
+ * @param[out] fname Resulting filename, with room for a suffix if necessary.
+ */
+static int ESECT
+mdb_fname_init(const char *path, unsigned envflags, MDB_name *fname)
+{
+ int no_suffix = F_ISSET(envflags, MDB_NOSUBDIR|MDB_NOLOCK);
+ fname->mn_alloced = 0;
+#ifdef _WIN32
+ return utf8_to_utf16(path, fname, no_suffix ? 0 : MDB_SUFFLEN);
+#else
+ fname->mn_len = strlen(path);
+ if (no_suffix)
+ fname->mn_val = (char *) path;
+ else if ((fname->mn_val = malloc(fname->mn_len + MDB_SUFFLEN+1)) != NULL) {
+ fname->mn_alloced = 1;
+ strcpy(fname->mn_val, path);
+ }
+ else
+ return ENOMEM;
+ return MDB_SUCCESS;
+#endif
+}
+
+/** Destroy \b fname from #mdb_fname_init() */
+#define mdb_fname_destroy(fname) \
+ do { if ((fname).mn_alloced) free((fname).mn_val); } while (0)
+
+#ifdef O_CLOEXEC /* POSIX.1-2008: Set FD_CLOEXEC atomically at open() */
+# define MDB_CLOEXEC O_CLOEXEC
+#else
+# define MDB_CLOEXEC 0
+#endif
+
+/** File type, access mode etc. for #mdb_fopen() */
+enum mdb_fopen_type {
+#ifdef _WIN32
+ MDB_O_RDONLY, MDB_O_RDWR, MDB_O_META, MDB_O_COPY, MDB_O_LOCKS
+#else
+ /* A comment in mdb_fopen() explains some O_* flag choices. */
+ MDB_O_RDONLY= O_RDONLY, /**< for RDONLY me_fd */
+ MDB_O_RDWR = O_RDWR |O_CREAT, /**< for me_fd */
+ MDB_O_META = O_WRONLY|MDB_DSYNC |MDB_CLOEXEC, /**< for me_mfd */
+ MDB_O_COPY = O_WRONLY|O_CREAT|O_EXCL|MDB_CLOEXEC, /**< for #mdb_env_copy() */
+ /** Bitmask for open() flags in enum #mdb_fopen_type. The other bits
+ * distinguish otherwise-equal MDB_O_* constants from each other.
+ */
+ MDB_O_MASK = MDB_O_RDWR|MDB_CLOEXEC | MDB_O_RDONLY|MDB_O_META|MDB_O_COPY,
+ MDB_O_LOCKS = MDB_O_RDWR|MDB_CLOEXEC | ((MDB_O_MASK+1) & ~MDB_O_MASK) /**< for me_lfd */
+#endif
+};
+
+/** Open an LMDB file.
+ * @param[in] env The LMDB environment.
+ * @param[in,out] fname Path from from #mdb_fname_init(). A suffix is
+ * appended if necessary to create the filename, without changing mn_len.
+ * @param[in] which Determines file type, access mode, etc.
+ * @param[in] mode The Unix permissions for the file, if we create it.
+ * @param[out] res Resulting file handle.
+ * @return 0 on success, non-zero on failure.
+ */
+static int ESECT
+mdb_fopen(const MDB_env *env, MDB_name *fname,
+ enum mdb_fopen_type which, mdb_mode_t mode,
+ HANDLE *res)
+{
+ int rc = MDB_SUCCESS;
+ HANDLE fd;
+#ifdef _WIN32
+ DWORD acc, share, disp, attrs;
+#else
+ int flags;
+#endif
+
+ if (fname->mn_alloced) /* modifiable copy */
+ mdb_name_cpy(fname->mn_val + fname->mn_len,
+ mdb_suffixes[which==MDB_O_LOCKS][F_ISSET(env->me_flags, MDB_NOSUBDIR)]);
+
+ /* The directory must already exist. Usually the file need not.
+ * MDB_O_META requires the file because we already created it using
+ * MDB_O_RDWR. MDB_O_COPY must not overwrite an existing file.
+ *
+ * With MDB_O_COPY we do not want the OS to cache the writes, since
+ * the source data is already in the OS cache.
+ *
+ * The lockfile needs FD_CLOEXEC (close file descriptor on exec*())
+ * to avoid the flock() issues noted under Caveats in lmdb.h.
+ * Also set it for other filehandles which the user cannot get at
+ * and close himself, which he may need after fork(). I.e. all but
+ * me_fd, which programs do use via mdb_env_get_fd().
+ */
+
+#ifdef _WIN32
+ acc = GENERIC_READ|GENERIC_WRITE;
+ share = FILE_SHARE_READ|FILE_SHARE_WRITE;
+ disp = OPEN_ALWAYS;
+ attrs = FILE_ATTRIBUTE_NORMAL;
+ switch (which) {
+ case MDB_O_RDONLY: /* read-only datafile */
+ acc = GENERIC_READ;
+ disp = OPEN_EXISTING;
+ break;
+ case MDB_O_META: /* for writing metapages */
+ acc = GENERIC_WRITE;
+ disp = OPEN_EXISTING;
+ attrs = FILE_ATTRIBUTE_NORMAL|FILE_FLAG_WRITE_THROUGH;
+ break;
+ case MDB_O_COPY: /* mdb_env_copy() & co */
+ acc = GENERIC_WRITE;
+ share = 0;
+ disp = CREATE_NEW;
+ attrs = FILE_FLAG_NO_BUFFERING|FILE_FLAG_WRITE_THROUGH;
+ break;
+ default: break; /* silence gcc -Wswitch (not all enum values handled) */
+ }
+ fd = CreateFileW(fname->mn_val, acc, share, NULL, disp, attrs, NULL);
+#else
+ fd = open(fname->mn_val, which & MDB_O_MASK, mode);
+#endif
+
+ if (fd == INVALID_HANDLE_VALUE)
+ rc = ErrCode();
+#ifndef _WIN32
+ else {
+ if (which != MDB_O_RDONLY && which != MDB_O_RDWR) {
+ /* Set CLOEXEC if we could not pass it to open() */
+ if (!MDB_CLOEXEC && (flags = fcntl(fd, F_GETFD)) != -1)
+ (void) fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
+ }
+ if (which == MDB_O_COPY && env->me_psize >= env->me_os_psize) {
+ /* This may require buffer alignment. There is no portable
+ * way to ask how much, so we require OS pagesize alignment.
+ */
+# ifdef F_NOCACHE /* __APPLE__ */
+ (void) fcntl(fd, F_NOCACHE, 1);
+# elif defined O_DIRECT
+ /* open(...O_DIRECT...) would break on filesystems without
+ * O_DIRECT support (ITS#7682). Try to set it here instead.
+ */
+ if ((flags = fcntl(fd, F_GETFL)) != -1)
+ (void) fcntl(fd, F_SETFL, flags | O_DIRECT);
+# endif
+ }
+ }
+#endif /* !_WIN32 */
+
+ *res = fd;
+ return rc;
+}
+
+
#ifdef BROKEN_FDATASYNC
#include <sys/utsname.h>
#include <sys/vfs.h>
{
MDB_reader *reader = ptr;
- reader->mr_pid = 0;
+#ifndef _WIN32
+ if (reader->mr_pid == getpid()) /* catch pthread_exit() in child process */
+#endif
+ /* We omit the mutex, so do this atomically (i.e. skip mr_txnid) */
+ reader->mr_pid = 0;
}
#ifdef _WIN32
/** Open and/or initialize the lock region for the environment.
* @param[in] env The LMDB environment.
- * @param[in] lpath The pathname of the file used for the lock region.
+ * @param[in] fname Filename + scratch area, from #mdb_fname_init().
* @param[in] mode The Unix permissions for the file, if we create it.
* @param[in,out] excl In -1, out lock type: -1 none, 0 shared, 1 exclusive
* @return 0 on success, non-zero on failure.
*/
static int ESECT
-mdb_env_setup_locks(MDB_env *env, char *lpath, int mode, int *excl)
+mdb_env_setup_locks(MDB_env *env, MDB_name *fname, int mode, int *excl)
{
#ifdef _WIN32
# define MDB_ERRCODE_ROFS ERROR_WRITE_PROTECT
#else
# define MDB_ERRCODE_ROFS EROFS
-#ifdef O_CLOEXEC /* Linux: Open file and set FD_CLOEXEC atomically */
-# define MDB_CLOEXEC O_CLOEXEC
-#else
- int fdflags;
-# define MDB_CLOEXEC 0
-#endif
#endif
#ifdef MDB_USE_SYSV_SEM
int semid;
int rc;
off_t size, rsize;
-#ifdef _WIN32
- wchar_t *wlpath;
- rc = utf8_to_utf16(lpath, -1, &wlpath, NULL);
- if (rc)
- return rc;
- env->me_lfd = CreateFileW(wlpath, GENERIC_READ|GENERIC_WRITE,
- FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_ALWAYS,
- FILE_ATTRIBUTE_NORMAL, NULL);
- free(wlpath);
-#else
- env->me_lfd = open(lpath, O_RDWR|O_CREAT|MDB_CLOEXEC, mode);
-#endif
- if (env->me_lfd == INVALID_HANDLE_VALUE) {
- rc = ErrCode();
+ rc = mdb_fopen(env, fname, MDB_O_LOCKS, mode, &env->me_lfd);
+ if (rc) {
+ /* Omit lockfile if read-only env on read-only filesystem */
if (rc == MDB_ERRCODE_ROFS && (env->me_flags & MDB_RDONLY)) {
return MDB_SUCCESS;
}
- goto fail_errno;
+ goto fail;
}
-#if ! ((MDB_CLOEXEC) || defined(_WIN32))
- /* Lose record locks when exec*() */
- if ((fdflags = fcntl(env->me_lfd, F_GETFD) | FD_CLOEXEC) >= 0)
- fcntl(env->me_lfd, F_SETFD, fdflags);
-#endif
if (!(env->me_flags & MDB_NOTLS)) {
rc = pthread_key_create(&env->me_txkey, mdb_env_reader_dest);
if (env->me_wmutex == SEM_FAILED) goto fail_errno;
#elif defined(MDB_USE_SYSV_SEM)
unsigned short vals[2] = {1, 1};
- key_t key = ftok(lpath, 'M');
+ key_t key = ftok(fname->mn_val, 'M'); /* fname is lockfile path now */
if (key == -1)
goto fail_errno;
semid = semget(key, 2, (mode & 0777) | IPC_CREAT);
env->me_wmutex->semnum = 1;
env->me_rmutex->locked = &env->me_txns->mti_rlocked;
env->me_wmutex->locked = &env->me_txns->mti_wlocked;
-#endif
-#ifdef MDB_VL32
-#ifdef _WIN32
- env->me_rpmutex = CreateMutex(NULL, FALSE, NULL);
-#else
- pthread_mutex_init(&env->me_rpmutex, NULL);
-#endif
#endif
return MDB_SUCCESS;
return rc;
}
- /** The name of the lock file in the DB environment */
-#define LOCKNAME "/lock.mdb"
- /** The name of the data file in the DB environment */
-#define DATANAME "/data.mdb"
- /** The suffix of the lock file when no subdir is used */
-#define LOCKSUFF "-lock"
/** Only a subset of the @ref mdb_env flags can be changed
* at runtime. Changing other flags requires closing the
* environment and re-opening it with the new flags.
int ESECT
mdb_env_open(MDB_env *env, const char *path, unsigned int flags, mdb_mode_t mode)
{
- int oflags, rc, len, excl = -1;
- char *lpath, *dpath;
-#ifdef _WIN32
- wchar_t *wpath;
-#endif
+ int rc, excl = -1;
+ MDB_name fname;
if (env->me_fd!=INVALID_HANDLE_VALUE || (flags & ~(CHANGEABLE|CHANGELESS)))
return EINVAL;
return EINVAL;
}
#endif
+ flags |= env->me_flags;
- len = strlen(path);
- if (flags & MDB_NOSUBDIR) {
- rc = len + sizeof(LOCKSUFF) + len + 1;
- } else {
- rc = len + sizeof(LOCKNAME) + len + sizeof(DATANAME);
- }
- lpath = malloc(rc);
- if (!lpath)
- return ENOMEM;
- if (flags & MDB_NOSUBDIR) {
- dpath = lpath + len + sizeof(LOCKSUFF);
- sprintf(lpath, "%s" LOCKSUFF, path);
- strcpy(dpath, path);
- } else {
- dpath = lpath + len + sizeof(LOCKNAME);
- sprintf(lpath, "%s" LOCKNAME, path);
- sprintf(dpath, "%s" DATANAME, path);
+ rc = mdb_fname_init(path, flags, &fname);
+ if (rc)
+ return rc;
+
+#ifdef MDB_VL32
+#ifdef _WIN32
+ env->me_rpmutex = CreateMutex(NULL, FALSE, NULL);
+ if (!env->me_rpmutex) {
+ rc = ErrCode();
+ goto leave;
}
+#else
+ rc = pthread_mutex_init(&env->me_rpmutex, NULL);
+ if (rc)
+ goto leave;
+#endif
+#endif
+ flags |= MDB_ENV_ACTIVE; /* tell mdb_env_close0() to clean up */
- rc = MDB_SUCCESS;
- flags |= env->me_flags;
if (flags & MDB_RDONLY) {
/* silently ignore WRITEMAP when we're only getting read access */
flags &= ~MDB_WRITEMAP;
(env->me_dirty_list = calloc(MDB_IDL_UM_SIZE, sizeof(MDB_ID2)))))
rc = ENOMEM;
}
+
+ env->me_flags = flags;
+ if (rc)
+ goto leave;
+
#ifdef MDB_VL32
- if (!rc) {
+ {
env->me_rpages = malloc(MDB_ERPAGE_SIZE * sizeof(MDB_ID3));
if (!env->me_rpages) {
rc = ENOMEM;
env->me_rpcheck = MDB_ERPAGE_SIZE/2;
}
#endif
- env->me_flags = flags |= MDB_ENV_ACTIVE;
- if (rc)
- goto leave;
env->me_path = strdup(path);
env->me_dbxs = calloc(env->me_maxdbs, sizeof(MDB_dbx));
/* For RDONLY, get lockfile after we know datafile exists */
if (!(flags & (MDB_RDONLY|MDB_NOLOCK))) {
- rc = mdb_env_setup_locks(env, lpath, mode, &excl);
+ rc = mdb_env_setup_locks(env, &fname, mode, &excl);
if (rc)
goto leave;
}
-#ifdef _WIN32
- if (F_ISSET(flags, MDB_RDONLY)) {
- oflags = GENERIC_READ;
- len = OPEN_EXISTING;
- } else {
- oflags = GENERIC_READ|GENERIC_WRITE;
- len = OPEN_ALWAYS;
- }
- mode = FILE_ATTRIBUTE_NORMAL;
- rc = utf8_to_utf16(dpath, -1, &wpath, NULL);
+ rc = mdb_fopen(env, &fname,
+ (flags & MDB_RDONLY) ? MDB_O_RDONLY : MDB_O_RDWR,
+ mode, &env->me_fd);
if (rc)
goto leave;
- env->me_fd = CreateFileW(wpath, oflags, FILE_SHARE_READ|FILE_SHARE_WRITE,
- NULL, len, mode, NULL);
- free(wpath);
-#else
- if (F_ISSET(flags, MDB_RDONLY))
- oflags = O_RDONLY;
- else
- oflags = O_RDWR | O_CREAT;
-
- env->me_fd = open(dpath, oflags, mode);
-#endif
- if (env->me_fd == INVALID_HANDLE_VALUE) {
- rc = ErrCode();
- goto leave;
- }
if ((flags & (MDB_RDONLY|MDB_NOLOCK)) == MDB_RDONLY) {
- rc = mdb_env_setup_locks(env, lpath, mode, &excl);
+ rc = mdb_env_setup_locks(env, &fname, mode, &excl);
if (rc)
goto leave;
}
if ((rc = mdb_env_open2(env)) == MDB_SUCCESS) {
- if (flags & (MDB_RDONLY|MDB_WRITEMAP)) {
- env->me_mfd = env->me_fd;
- } else {
+ if (!(flags & (MDB_RDONLY|MDB_WRITEMAP))) {
/* Synchronous fd for meta writes. Needed even with
* MDB_NOSYNC/MDB_NOMETASYNC, in case these get reset.
*/
-#ifdef _WIN32
- len = OPEN_EXISTING;
- rc = utf8_to_utf16(dpath, -1, &wpath, NULL);
+ rc = mdb_fopen(env, &fname, MDB_O_META, mode, &env->me_mfd);
if (rc)
goto leave;
- env->me_mfd = CreateFileW(wpath, oflags,
- FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, len,
- mode | FILE_FLAG_WRITE_THROUGH, NULL);
- free(wpath);
-#else
- oflags &= ~O_CREAT;
- env->me_mfd = open(dpath, oflags | MDB_DSYNC, mode);
-#endif
- if (env->me_mfd == INVALID_HANDLE_VALUE) {
- rc = ErrCode();
- goto leave;
- }
}
DPRINTF(("opened dbenv %p", (void *) env));
if (excl > 0) {
if (rc) {
mdb_env_close0(env, excl);
}
- free(lpath);
+ mdb_fname_destroy(fname);
return rc;
}
#ifdef MDB_VL32
if (env->me_txn0 && env->me_txn0->mt_rpages)
free(env->me_txn0->mt_rpages);
- { unsigned int x;
- for (x=1; x<=env->me_rpages[0].mid; x++)
- munmap(env->me_rpages[x].mptr, env->me_rpages[x].mcnt * env->me_psize);
+ if (env->me_rpages) {
+ MDB_ID3L el = env->me_rpages;
+ unsigned int x;
+ for (x=1; x<=el[0].mid; x++)
+ munmap(el[x].mptr, el[x].mcnt * env->me_psize);
+ free(el);
}
- free(env->me_rpages);
#endif
free(env->me_txn0);
mdb_midl_free(env->me_free_pgs);
munmap(env->me_map, env->me_mapsize);
#endif
}
- if (env->me_mfd != env->me_fd && env->me_mfd != INVALID_HANDLE_VALUE)
+ if (env->me_mfd != INVALID_HANDLE_VALUE)
(void) close(env->me_mfd);
if (env->me_fd != INVALID_HANDLE_VALUE)
(void) close(env->me_fd);
}
}
-/** Push a page onto the top of the cursor's stack. */
+/** Push a page onto the top of the cursor's stack.
+ * Set #MDB_TXN_ERROR on failure.
+ */
static int
mdb_cursor_push(MDB_cursor *mc, MDB_page *mp)
{
#endif
/** Find the address of the page corresponding to a given page number.
+ * Set #MDB_TXN_ERROR on failure.
* @param[in] mc the cursor accessing the page.
* @param[in] pgno the page number for the page to retrieve.
* @param[out] ret address of a pointer where the page's address will be stored.
{
#ifdef MDB_VL32
int rc = mdb_rpage_get(txn, pgno, &p);
- if (rc)
+ if (rc) {
+ txn->mt_flags |= MDB_TXN_ERROR;
return rc;
+ }
#else
MDB_env *env = txn->mt_env;
p = (MDB_page *)(env->me_map + env->me_psize * pgno);
} else
mc->mc_ki[mc->mc_top]--;
- mc->mc_flags &= ~C_EOF;
-
DPRINTF(("==> cursor points to page %"Yu" with %u keys, key index %u",
mdb_dbg_pgno(mp), NUMKEYS(mp), mc->mc_ki[mc->mc_top]));
}
}
rc = 0;
+ mc->mc_flags &= ~C_EOF;
goto set2;
}
}
{
int rc = MDB_SUCCESS;
- if (mc->mc_dbi >= CORE_DBS && !(*mc->mc_dbflag & DB_DIRTY)) {
+ if (mc->mc_dbi >= CORE_DBS && !(*mc->mc_dbflag & (DB_DIRTY|DB_DUPDATA))) {
+ /* Touch DB record of named DB */
MDB_cursor mc2;
MDB_xcursor mcx;
if (TXN_DBI_CHANGED(mc->mc_txn, mc->mc_dbi))
if (m3->mc_ki[i] >= mc->mc_ki[i] && insert_key) {
m3->mc_ki[i]++;
}
- if (m3->mc_xcursor && (m3->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED)) {
- MDB_node *n2 = NODEPTR(mp, m3->mc_ki[i]);
- if ((n2->mn_flags & (F_SUBDATA|F_DUPDATA)) == F_DUPDATA)
- m3->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(n2);
- }
+ if (XCURSOR_INITED(m3))
+ XCURSOR_REFRESH(m3, mp, m3->mc_ki[i]);
}
}
}
if (m2->mc_ki[i] == mc->mc_ki[i]) {
mdb_xcursor_init2(m2, mx, new_dupdata);
} else if (!insert_key && m2->mc_ki[i] < nkeys) {
- MDB_node *n2 = NODEPTR(mp, m2->mc_ki[i]);
- if ((n2->mn_flags & (F_SUBDATA|F_DUPDATA)) == F_DUPDATA)
- m2->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(n2);
+ XCURSOR_REFRESH(m2, mp, m2->mc_ki[i]);
}
}
}
if (m2 == mc || m2->mc_snum < mc->mc_snum) continue;
if (!(m2->mc_flags & C_INITIALIZED)) continue;
if (m2->mc_pg[mc->mc_top] == mp) {
- if (m2->mc_ki[mc->mc_top] == mc->mc_ki[mc->mc_top]) {
- m2->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(leaf);
- } else {
- MDB_node *n2 = NODEPTR(mp, m2->mc_ki[mc->mc_top]);
- if (!(n2->mn_flags & F_SUBDATA))
- m2->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(n2);
+ MDB_node *n2 = leaf;
+ if (m2->mc_ki[mc->mc_top] != mc->mc_ki[mc->mc_top]) {
+ n2 = NODEPTR(mp, m2->mc_ki[mc->mc_top]);
+ if (n2->mn_flags & F_SUBDATA) continue;
}
+ m2->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(n2);
}
}
}
}
/** Allocate and initialize new pages for a database.
+ * Set #MDB_TXN_ERROR on failure.
* @param[in] mc a cursor on the database being added to.
* @param[in] flags flags defining what type of page is being allocated.
* @param[in] num the number of pages to allocate. This is usually 1,
}
/** Add a node to the page pointed to by the cursor.
+ * Set #MDB_TXN_ERROR on failure.
* @param[in] mc The cursor for this operation.
* @param[in] indx The index on the page where the new node should be added.
* @param[in] key The key for the new node.
}
DPRINTF(("Sub-db -%u root page %"Yu, mx->mx_cursor.mc_dbi,
mx->mx_db.md_root));
- mx->mx_dbflag = DB_VALID|DB_USRVALID|DB_DIRTY; /* DB_DIRTY guides mdb_cursor_touch */
+ mx->mx_dbflag = DB_VALID|DB_USRVALID|DB_DUPDATA;
if (NEED_CMP_CLONG(mx->mx_dbx.md_cmp, mx->mx_db.md_pad))
mx->mx_dbx.md_cmp = mdb_cmp_clong;
}
mx->mx_cursor.mc_top = 0;
mx->mx_cursor.mc_flags |= C_INITIALIZED;
mx->mx_cursor.mc_ki[0] = 0;
- mx->mx_dbflag = DB_VALID|DB_USRVALID|DB_DIRTY; /* DB_DIRTY guides mdb_cursor_touch */
+ mx->mx_dbflag = DB_VALID|DB_USRVALID|DB_DUPDATA;
#if UINT_MAX < MDB_SIZE_MAX /* matches mdb_xcursor_init1:NEED_CMP_CLONG() */
mx->mx_dbx.md_cmp = src_mx->mx_dbx.md_cmp;
#endif
}
/** Replace the key for a branch node with a new key.
+ * Set #MDB_TXN_ERROR on failure.
* @param[in] mc Cursor pointing to the node to operate on.
* @param[in] key The new key to use.
* @return 0 on success, non-zero on failure.
m3->mc_ki[csrc->mc_top] = cdst->mc_ki[cdst->mc_top];
m3->mc_ki[csrc->mc_top-1]++;
}
- if (m3->mc_xcursor && (m3->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED) &&
- IS_LEAF(mps)) {
- MDB_node *node = NODEPTR(m3->mc_pg[csrc->mc_top], m3->mc_ki[csrc->mc_top]);
- if ((node->mn_flags & (F_DUPDATA|F_SUBDATA)) == F_DUPDATA)
- m3->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(node);
- }
+ if (XCURSOR_INITED(m3) && IS_LEAF(mps))
+ XCURSOR_REFRESH(m3, m3->mc_pg[csrc->mc_top], m3->mc_ki[csrc->mc_top]);
}
} else
/* Adding on the right, bump others down */
} else {
m3->mc_ki[csrc->mc_top]--;
}
- if (m3->mc_xcursor && (m3->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED) &&
- IS_LEAF(mps)) {
- MDB_node *node = NODEPTR(m3->mc_pg[csrc->mc_top], m3->mc_ki[csrc->mc_top]);
- if ((node->mn_flags & (F_DUPDATA|F_SUBDATA)) == F_DUPDATA)
- m3->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(node);
- }
+ if (XCURSOR_INITED(m3) && IS_LEAF(mps))
+ XCURSOR_REFRESH(m3, m3->mc_pg[csrc->mc_top], m3->mc_ki[csrc->mc_top]);
}
}
}
m3->mc_ki[top-1] > csrc->mc_ki[top-1]) {
m3->mc_ki[top-1]--;
}
- if (m3->mc_xcursor && (m3->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED) &&
- IS_LEAF(psrc)) {
- MDB_node *node = NODEPTR(m3->mc_pg[top], m3->mc_ki[top]);
- if ((node->mn_flags & (F_DUPDATA|F_SUBDATA)) == F_DUPDATA)
- m3->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(node);
- }
+ if (XCURSOR_INITED(m3) && IS_LEAF(psrc))
+ XCURSOR_REFRESH(m3, m3->mc_pg[top], m3->mc_ki[top]);
}
}
{
if (m3->mc_pg[mc->mc_top] == mp) {
if (m3->mc_ki[mc->mc_top] == ki) {
m3->mc_flags |= C_DEL;
+ if (mc->mc_db->md_flags & MDB_DUPSORT) {
+ /* Sub-cursor referred into dataset which is gone */
+ m3->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED|C_EOF);
+ }
+ continue;
} else if (m3->mc_ki[mc->mc_top] > ki) {
m3->mc_ki[mc->mc_top]--;
}
- if (m3->mc_xcursor && (m3->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED)) {
- MDB_node *node = NODEPTR(m3->mc_pg[mc->mc_top], m3->mc_ki[mc->mc_top]);
- if ((node->mn_flags & (F_DUPDATA|F_SUBDATA)) == F_DUPDATA)
- m3->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(node);
- }
+ if (XCURSOR_INITED(m3))
+ XCURSOR_REFRESH(m3, m3->mc_pg[mc->mc_top], m3->mc_ki[mc->mc_top]);
}
}
}
}
if (mc->mc_db->md_flags & MDB_DUPSORT) {
MDB_node *node = NODEPTR(m3->mc_pg[m3->mc_top], m3->mc_ki[m3->mc_top]);
- if (node->mn_flags & F_DUPDATA) {
- mdb_xcursor_init1(m3, node);
- m3->mc_xcursor->mx_cursor.mc_flags |= C_DEL;
+ /* If this node is a fake page, it needs to be reinited
+ * because its data has moved. But just reset mc_pg[0]
+ * if the xcursor is already live.
+ */
+ if ((node->mn_flags & (F_DUPDATA|F_SUBDATA)) == F_DUPDATA) {
+ if (m3->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED)
+ m3->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(node);
+ else
+ mdb_xcursor_init1(m3, node);
}
}
}
}
/** Split a page and insert a new node.
+ * Set #MDB_TXN_ERROR on failure.
* @param[in,out] mc Cursor pointing to the page and desired insertion index.
* The cursor will be updated to point to the actual page and index where
* the node got inserted after the split.
m3->mc_ki[ptop] >= mc->mc_ki[ptop]) {
m3->mc_ki[ptop]++;
}
- if (m3->mc_xcursor && (m3->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED) &&
- IS_LEAF(mp)) {
- MDB_node *node = NODEPTR(m3->mc_pg[mc->mc_top], m3->mc_ki[mc->mc_top]);
- if ((node->mn_flags & (F_DUPDATA|F_SUBDATA)) == F_DUPDATA)
- m3->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(node);
- }
+ if (XCURSOR_INITED(m3) && IS_LEAF(mp))
+ XCURSOR_REFRESH(m3, m3->mc_pg[mc->mc_top], m3->mc_ki[mc->mc_top]);
}
}
DPRINTF(("mp left: %d, rp left: %d", SIZELEFT(mp), SIZELEFT(rp)));
/** State needed for a double-buffering compacting copy. */
typedef struct mdb_copy {
+ MDB_env *mc_env;
+ MDB_txn *mc_txn;
pthread_mutex_t mc_mutex;
pthread_cond_t mc_cond; /**< Condition variable for #mc_new */
char *mc_wbuf[2];
char *mc_over[2];
- MDB_env *mc_env;
- MDB_txn *mc_txn;
int mc_wlen[2];
int mc_olen[2];
pgno_t mc_next_pgno;
HANDLE mc_fd;
int mc_toggle; /**< Buffer number in provider */
int mc_new; /**< (0-2 buffers to write) | (#MDB_EOF at end) */
- volatile int mc_error; /**< Error code, never cleared if set */
+ /** Error code. Never cleared if set. Both threads can set nonzero
+ * to fail the copy. Not mutex-protected, LMDB expects atomic int.
+ */
+ volatile int mc_error;
} mdb_copy;
/** Dedicated writer thread for compacting copy. */
return my->mc_error;
}
- /** Depth-first tree traversal for compacting copy. */
+ /** Depth-first tree traversal for compacting copy.
+ * @param[in] my control structure.
+ * @param[in,out] pg database root.
+ * @param[in] flags includes #F_DUPDATA if it is a sorted-duplicate sub-DB.
+ */
static int ESECT
mdb_env_cwalk(mdb_copy *my, pgno_t *pg, int flags)
{
int ESECT
mdb_env_copy2(MDB_env *env, const char *path, unsigned int flags)
{
- int rc, len;
- char *lpath;
+ int rc;
+ MDB_name fname;
HANDLE newfd = INVALID_HANDLE_VALUE;
-#ifdef _WIN32
- wchar_t *wpath;
-#endif
-
- if (env->me_flags & MDB_NOSUBDIR) {
- lpath = (char *)path;
- } else {
- len = strlen(path);
- len += sizeof(DATANAME);
- lpath = malloc(len);
- if (!lpath)
- return ENOMEM;
- sprintf(lpath, "%s" DATANAME, path);
- }
- /* The destination path must exist, but the destination file must not.
- * We don't want the OS to cache the writes, since the source data is
- * already in the OS cache.
- */
-#ifdef _WIN32
- rc = utf8_to_utf16(lpath, -1, &wpath, NULL);
- if (rc)
- goto leave;
- newfd = CreateFileW(wpath, GENERIC_WRITE, 0, NULL, CREATE_NEW,
- FILE_FLAG_NO_BUFFERING|FILE_FLAG_WRITE_THROUGH, NULL);
- free(wpath);
-#else
- newfd = open(lpath, O_WRONLY|O_CREAT|O_EXCL, 0666);
-#endif
- if (newfd == INVALID_HANDLE_VALUE) {
- rc = ErrCode();
- goto leave;
- }
-
- if (env->me_psize >= env->me_os_psize) {
-#ifdef O_DIRECT
- /* Set O_DIRECT if the file system supports it */
- if ((rc = fcntl(newfd, F_GETFL)) != -1)
- (void) fcntl(newfd, F_SETFL, rc | O_DIRECT);
-#endif
-#ifdef F_NOCACHE /* __APPLE__ */
- rc = fcntl(newfd, F_NOCACHE, 1);
- if (rc) {
- rc = ErrCode();
- goto leave;
- }
-#endif
+ rc = mdb_fname_init(path, env->me_flags | MDB_NOLOCK, &fname);
+ if (rc == MDB_SUCCESS) {
+ rc = mdb_fopen(env, &fname, MDB_O_COPY, 0666, &newfd);
+ mdb_fname_destroy(fname);
}
-
- rc = mdb_env_copyfd2(env, newfd, flags);
-
-leave:
- if (!(env->me_flags & MDB_NOSUBDIR))
- free(lpath);
- if (newfd != INVALID_HANDLE_VALUE)
+ if (rc == MDB_SUCCESS) {
+ rc = mdb_env_copyfd2(env, newfd, flags);
if (close(newfd) < 0 && rc == MDB_SUCCESS)
rc = ErrCode();
-
+ }
return rc;
}
memset(&dummy, 0, sizeof(dummy));
dummy.md_root = P_INVALID;
dummy.md_flags = flags & PERSISTENT_FLAGS;
- rc = mdb_cursor_put(&mc, &key, &data, F_SUBDATA);
+ WITH_CURSOR_TRACKING(mc,
+ rc = mdb_cursor_put(&mc, &key, &data, F_SUBDATA));
dbflag |= DB_DIRTY;
}
return env->me_txns ? mdb_reader_check0(env, 0, dead) : MDB_SUCCESS;
}
-/** As #mdb_reader_check(). rlocked = <caller locked the reader mutex>. */
+/** As #mdb_reader_check(). \b rlocked is set if caller locked #me_rmutex. */
static int ESECT
mdb_reader_check0(MDB_env *env, int rlocked, int *dead)
{
return rc;
}
#endif /* MDB_ROBUST_SUPPORTED */
-/** @} */
#if defined(_WIN32)
-static int utf8_to_utf16(const char *src, int srcsize, wchar_t **dst, int *dstsize)
-{
- int need;
- wchar_t *result;
- need = MultiByteToWideChar(CP_UTF8, 0, src, srcsize, NULL, 0);
- if (need == 0xFFFD)
- return EILSEQ;
- if (need == 0)
- return EINVAL;
- result = malloc(sizeof(wchar_t) * need);
- if (!result)
- return ENOMEM;
- MultiByteToWideChar(CP_UTF8, 0, src, srcsize, result, need);
- if (dstsize)
- *dstsize = need;
- *dst = result;
- return 0;
+/** Convert \b src to new wchar_t[] string with room for \b xtra extra chars */
+static int ESECT
+utf8_to_utf16(const char *src, MDB_name *dst, int xtra)
+{
+ int rc, need = 0;
+ wchar_t *result = NULL;
+ for (;;) { /* malloc result, then fill it in */
+ need = MultiByteToWideChar(CP_UTF8, 0, src, -1, result, need);
+ if (!need) {
+ rc = ErrCode();
+ free(result);
+ return rc;
+ }
+ if (!result) {
+ result = malloc(sizeof(wchar_t) * (need + xtra));
+ if (!result)
+ return ENOMEM;
+ continue;
+ }
+ dst->mn_alloced = 1;
+ dst->mn_len = need - 1;
+ dst->mn_val = result;
+ return MDB_SUCCESS;
+ }
}
#endif /* defined(_WIN32) */
+/** @} */
projects / openldap / blobdiff