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-rw-r--r--lib/tdb2/tdb1_io.c51
-rw-r--r--lib/tdb2/tdb1_private.h2
-rw-r--r--lib/tdb2/test/run-tdb1-3G-file.c27
3 files changed, 56 insertions, 24 deletions
diff --git a/lib/tdb2/tdb1_io.c b/lib/tdb2/tdb1_io.c
index e7d20b8cfc..4371c236cc 100644
--- a/lib/tdb2/tdb1_io.c
+++ b/lib/tdb2/tdb1_io.c
@@ -70,8 +70,7 @@ static int tdb1_oob(struct tdb_context *tdb, tdb1_off_t len, int probe)
return -1;
}
tdb->file->map_size = st.st_size;
- tdb1_mmap(tdb);
- return 0;
+ return tdb1_mmap(tdb);
}
/* write a lump of data at a specified offset */
@@ -93,6 +92,10 @@ static int tdb1_write(struct tdb_context *tdb, tdb1_off_t off,
if (tdb->file->map_ptr) {
memcpy(off + (char *)tdb->file->map_ptr, buf, len);
} else {
+#ifdef HAVE_INCOHERENT_MMAP
+ tdb->last_error = TDB_ERR_IO;
+ return -1;
+#else
ssize_t written = pwrite(tdb->file->fd, buf, len, off);
if ((written != (ssize_t)len) && (written != -1)) {
tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_WARNING,
@@ -118,6 +121,7 @@ static int tdb1_write(struct tdb_context *tdb, tdb1_off_t off,
len, off);
return -1;
}
+#endif
}
return 0;
}
@@ -143,6 +147,10 @@ static int tdb1_read(struct tdb_context *tdb, tdb1_off_t off, void *buf,
if (tdb->file->map_ptr) {
memcpy(buf, off + (char *)tdb->file->map_ptr, len);
} else {
+#ifdef HAVE_INCOHERENT_MMAP
+ tdb->last_error = TDB_ERR_IO;
+ return -1;
+#else
ssize_t ret = pread(tdb->file->fd, buf, len, off);
if (ret != (ssize_t)len) {
/* Ensure ecode is set for log fn. */
@@ -154,6 +162,7 @@ static int tdb1_read(struct tdb_context *tdb, tdb1_off_t off, void *buf,
(int)tdb->file->map_size);
return -1;
}
+#endif
}
if (cv) {
tdb1_convert(buf, len);
@@ -206,13 +215,23 @@ int tdb1_munmap(struct tdb_context *tdb)
return 0;
}
-void tdb1_mmap(struct tdb_context *tdb)
+/* If mmap isn't coherent, *everyone* must always mmap. */
+static bool should_mmap(const struct tdb_context *tdb)
+{
+#ifdef HAVE_INCOHERENT_MMAP
+ return true;
+#else
+ return !(tdb->flags & TDB_NOMMAP);
+#endif
+}
+
+int tdb1_mmap(struct tdb_context *tdb)
{
if (tdb->flags & TDB_INTERNAL)
- return;
+ return 0;
#if HAVE_MMAP
- if (!(tdb->flags & TDB_NOMMAP)) {
+ if (should_mmap(tdb)) {
int mmap_flags;
if ((tdb->open_flags & O_ACCMODE) == O_RDONLY)
mmap_flags = PROT_READ;
@@ -233,6 +252,10 @@ void tdb1_mmap(struct tdb_context *tdb)
"tdb1_mmap failed for size %llu (%s)",
(long long)tdb->file->map_size,
strerror(errno));
+#ifdef HAVE_INCOHERENT_MMAP
+ tdb->last_error = TDB_ERR_IO;
+ return -1;
+#endif
}
} else {
tdb->file->map_ptr = NULL;
@@ -240,6 +263,7 @@ void tdb1_mmap(struct tdb_context *tdb)
#else
tdb->file->map_ptr = NULL;
#endif
+ return 0;
}
/* expand a file. we prefer to use ftruncate, as that is what posix
@@ -353,12 +377,6 @@ int tdb1_expand(struct tdb_context *tdb, tdb1_off_t size)
if (!(tdb->flags & TDB_INTERNAL))
tdb1_munmap(tdb);
- /*
- * We must ensure the file is unmapped before doing this
- * to ensure consistency with systems like OpenBSD where
- * writes and mmaps are not consistent.
- */
-
/* expand the file itself */
if (!(tdb->flags & TDB_INTERNAL)) {
if (tdb->tdb1.io->tdb1_expand_file(tdb, tdb->file->map_size, size) != 0)
@@ -379,14 +397,9 @@ int tdb1_expand(struct tdb_context *tdb, tdb1_off_t size)
}
tdb->file->map_ptr = new_map_ptr;
} else {
- /*
- * We must ensure the file is remapped before adding the space
- * to ensure consistency with systems like OpenBSD where
- * writes and mmaps are not consistent.
- */
-
- /* We're ok if the mmap fails as we'll fallback to read/write */
- tdb1_mmap(tdb);
+ if (tdb1_mmap(tdb) != 0) {
+ goto fail;
+ }
}
/* form a new freelist record */
diff --git a/lib/tdb2/tdb1_private.h b/lib/tdb2/tdb1_private.h
index 68dc39f6f8..833298b737 100644
--- a/lib/tdb2/tdb1_private.h
+++ b/lib/tdb2/tdb1_private.h
@@ -121,7 +121,7 @@ struct tdb1_methods {
internal prototypes
*/
int tdb1_munmap(struct tdb_context *tdb);
-void tdb1_mmap(struct tdb_context *tdb);
+int tdb1_mmap(struct tdb_context *tdb);
int tdb1_lock(struct tdb_context *tdb, int list, int ltype);
int tdb1_nest_lock(struct tdb_context *tdb, uint32_t offset, int ltype,
enum tdb_lock_flags flags);
diff --git a/lib/tdb2/test/run-tdb1-3G-file.c b/lib/tdb2/test/run-tdb1-3G-file.c
index e75122ada9..148611753f 100644
--- a/lib/tdb2/test/run-tdb1-3G-file.c
+++ b/lib/tdb2/test/run-tdb1-3G-file.c
@@ -63,6 +63,7 @@ int main(int argc, char *argv[])
tdb1_off_t rec_ptr;
struct tdb1_record rec;
union tdb_attribute hsize;
+ int ret;
hsize.base.attr = TDB_ATTRIBUTE_TDB1_HASHSIZE;
hsize.base.next = &tap_log_attr;
@@ -75,15 +76,33 @@ int main(int argc, char *argv[])
ok1(tdb);
tdb->tdb1.io = &large_io_methods;
- /* Enlarge the file (internally multiplies by 2). */
- ok1(tdb1_expand(tdb, 1500000000) == 0);
-
- /* Put an entry in, and check it. */
key.dsize = strlen("hi");
key.dptr = (void *)"hi";
orig_data.dsize = strlen("world");
orig_data.dptr = (void *)"world";
+ /* Enlarge the file (internally multiplies by 2). */
+ ret = tdb1_expand(tdb, 1500000000);
+
+#ifdef HAVE_INCOHERENT_MMAP
+ /* This can fail due to mmap failure on 32 bit systems. */
+ if (ret == -1) {
+ /* These should now fail. */
+ ok1(tdb_store(tdb, key, orig_data, TDB_INSERT) == TDB_ERR_IO);
+ ok1(tdb_fetch(tdb, key, &data) == TDB_ERR_IO);
+ ok1(tdb_traverse(tdb, test_traverse, &orig_data) == TDB_ERR_IO);
+ ok1(tdb_delete(tdb, key) == TDB_ERR_IO);
+ ok1(tdb_traverse(tdb, test_traverse, NULL) == TDB_ERR_IO);
+ /* Skip the rest... */
+ for (ret = 0; ret < 26 - 6; ret++)
+ ok1(1);
+ tdb_close(tdb);
+ return exit_status();
+ }
+#endif
+ ok1(ret == 0);
+
+ /* Put an entry in, and check it. */
ok1(tdb_store(tdb, key, orig_data, TDB_INSERT) == TDB_SUCCESS);
ok1(tdb_fetch(tdb, key, &data) == TDB_SUCCESS);
generated by cgit (git 2.34.1) at 2024-12-14 15:49:35 +0000