This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
*/
#include "includes.h"
-#include "system/filesys.h"
-#include "lib/tdb/include/tdb.h"
-#include "messaging/messaging.h"
-#include "db_wrap.h"
-#include "lib/messaging/irpc.h"
-#include "librpc/gen_ndr/ndr_opendb.h"
#include "ntvfs/ntvfs.h"
+#include "ntvfs/common/ntvfs_common.h"
+#include "cluster/cluster.h"
+#include "param/param.h"
-struct odb_context {
- struct tdb_wrap *w;
- struct ntvfs_context *ntvfs_ctx;
- BOOL oplocks;
-};
+static const struct opendb_ops *ops;
/*
- an odb lock handle. You must obtain one of these using odb_lock() before doing
- any other operations.
+ set the odb backend ops
*/
-struct odb_lock {
- struct odb_context *odb;
- TDB_DATA key;
-};
+void odb_set_ops(const struct opendb_ops *new_ops)
+{
+ ops = new_ops;
+}
/*
Open up the openfiles.tdb database. Close it down using
_PUBLIC_ struct odb_context *odb_init(TALLOC_CTX *mem_ctx,
struct ntvfs_context *ntvfs_ctx)
{
- char *path;
- struct odb_context *odb;
-
- odb = talloc(mem_ctx, struct odb_context);
- if (odb == NULL) {
- return NULL;
- }
-
- path = smbd_tmp_path(odb, "openfiles.tdb");
- odb->w = tdb_wrap_open(odb, path, 0,
- TDB_DEFAULT,
- O_RDWR|O_CREAT, 0600);
- talloc_free(path);
- if (odb->w == NULL) {
- talloc_free(odb);
- return NULL;
+ if (ops == NULL) {
+ if (lp_parm_bool(ntvfs_ctx->lp_ctx, NULL, "ctdb", "opendb", false)) {
+ odb_ctdb_init_ops();
+ } else {
+ odb_tdb_init_ops();
+ }
}
-
- odb->ntvfs_ctx = ntvfs_ctx;
-
- /* leave oplocks disabled by default until the code is working */
- odb->oplocks = lp_parm_bool(-1, "opendb", "oplocks", False);
-
- return odb;
-}
-
-/*
- destroy a lock on the database
-*/
-static int odb_lock_destructor(struct odb_lock *lck)
-{
- tdb_chainunlock(lck->odb->w->tdb, lck->key);
- return 0;
+ return ops->odb_init(mem_ctx, ntvfs_ctx);
}
/*
_PUBLIC_ struct odb_lock *odb_lock(TALLOC_CTX *mem_ctx,
struct odb_context *odb, DATA_BLOB *file_key)
{
- struct odb_lock *lck;
-
- lck = talloc(mem_ctx, struct odb_lock);
- if (lck == NULL) {
- return NULL;
- }
-
- lck->odb = talloc_reference(lck, odb);
- lck->key.dptr = talloc_memdup(lck, file_key->data, file_key->length);
- lck->key.dsize = file_key->length;
- if (lck->key.dptr == NULL) {
- talloc_free(lck);
- return NULL;
- }
-
- if (tdb_chainlock(odb->w->tdb, lck->key) != 0) {
- talloc_free(lck);
- return NULL;
- }
-
- talloc_set_destructor(lck, odb_lock_destructor);
-
- return lck;
-}
-
-/*
- determine if two odb_entry structures conflict
-
- return NT_STATUS_OK on no conflict
-*/
-static NTSTATUS share_conflict(struct opendb_entry *e1, struct opendb_entry *e2)
-{
- /* if either open involves no read.write or delete access then
- it can't conflict */
- if (!(e1->access_mask & (SEC_FILE_WRITE_DATA |
- SEC_FILE_APPEND_DATA |
- SEC_FILE_READ_DATA |
- SEC_FILE_EXECUTE |
- SEC_STD_DELETE))) {
- return NT_STATUS_OK;
- }
- if (!(e2->access_mask & (SEC_FILE_WRITE_DATA |
- SEC_FILE_APPEND_DATA |
- SEC_FILE_READ_DATA |
- SEC_FILE_EXECUTE |
- SEC_STD_DELETE))) {
- return NT_STATUS_OK;
- }
-
- /* data IO access masks. This is skipped if the two open handles
- are on different streams (as in that case the masks don't
- interact) */
- if (e1->stream_id != e2->stream_id) {
- return NT_STATUS_OK;
- }
-
-#define CHECK_MASK(am, right, sa, share) \
- if (((am) & (right)) && !((sa) & (share))) return NT_STATUS_SHARING_VIOLATION
-
- CHECK_MASK(e1->access_mask, SEC_FILE_WRITE_DATA | SEC_FILE_APPEND_DATA,
- e2->share_access, NTCREATEX_SHARE_ACCESS_WRITE);
- CHECK_MASK(e2->access_mask, SEC_FILE_WRITE_DATA | SEC_FILE_APPEND_DATA,
- e1->share_access, NTCREATEX_SHARE_ACCESS_WRITE);
-
- CHECK_MASK(e1->access_mask, SEC_FILE_READ_DATA | SEC_FILE_EXECUTE,
- e2->share_access, NTCREATEX_SHARE_ACCESS_READ);
- CHECK_MASK(e2->access_mask, SEC_FILE_READ_DATA | SEC_FILE_EXECUTE,
- e1->share_access, NTCREATEX_SHARE_ACCESS_READ);
-
- CHECK_MASK(e1->access_mask, SEC_STD_DELETE,
- e2->share_access, NTCREATEX_SHARE_ACCESS_DELETE);
- CHECK_MASK(e2->access_mask, SEC_STD_DELETE,
- e1->share_access, NTCREATEX_SHARE_ACCESS_DELETE);
-
- return NT_STATUS_OK;
-}
-
-/*
- pull a record, translating from the db format to the opendb_file structure defined
- in opendb.idl
-*/
-static NTSTATUS odb_pull_record(struct odb_lock *lck, struct opendb_file *file)
-{
- struct odb_context *odb = lck->odb;
- TDB_DATA dbuf;
- DATA_BLOB blob;
- NTSTATUS status;
-
- dbuf = tdb_fetch(odb->w->tdb, lck->key);
- if (dbuf.dptr == NULL) {
- return NT_STATUS_OBJECT_NAME_NOT_FOUND;
- }
-
- blob.data = dbuf.dptr;
- blob.length = dbuf.dsize;
-
- status = ndr_pull_struct_blob(&blob, lck, file, (ndr_pull_flags_fn_t)ndr_pull_opendb_file);
-
- free(dbuf.dptr);
-
- return status;
+ return ops->odb_lock(mem_ctx, odb, file_key);
}
-/*
- push a record, translating from the opendb_file structure defined in opendb.idl
-*/
-static NTSTATUS odb_push_record(struct odb_lock *lck, struct opendb_file *file)
+_PUBLIC_ DATA_BLOB odb_get_key(TALLOC_CTX *mem_ctx, struct odb_lock *lck)
{
- struct odb_context *odb = lck->odb;
- TDB_DATA dbuf;
- DATA_BLOB blob;
- NTSTATUS status;
- int ret;
-
- if (file->num_entries == 0) {
- ret = tdb_delete(odb->w->tdb, lck->key);
- if (ret != 0) {
- return NT_STATUS_INTERNAL_DB_CORRUPTION;
- }
- return NT_STATUS_OK;
- }
-
- status = ndr_push_struct_blob(&blob, lck, file, (ndr_push_flags_fn_t)ndr_push_opendb_file);
- NT_STATUS_NOT_OK_RETURN(status);
-
- dbuf.dptr = blob.data;
- dbuf.dsize = blob.length;
-
- ret = tdb_store(odb->w->tdb, lck->key, dbuf, TDB_REPLACE);
- data_blob_free(&blob);
- if (ret != 0) {
- return NT_STATUS_INTERNAL_DB_CORRUPTION;
- }
-
- return NT_STATUS_OK;
-}
-
-/*
- send an oplock break to a client
-*/
-static NTSTATUS odb_oplock_break_send(struct odb_context *odb, struct opendb_entry *e)
-{
- /* tell the server handling this open file about the need to send the client
- a break */
- return messaging_send_ptr(odb->ntvfs_ctx->msg_ctx, e->server,
- MSG_NTVFS_OPLOCK_BREAK, e->file_handle);
+ return ops->odb_get_key(mem_ctx, lck);
}
/*
- register an open file in the open files database. This implements the share_access
- rules
+ register an open file in the open files database.
+ The share_access rules are implemented by odb_can_open()
+ and it's needed to call odb_can_open() before
+ odb_open_file() otherwise NT_STATUS_INTERNAL_ERROR is returned
Note that the path is only used by the delete on close logic, not
for comparing with other filenames
*/
-_PUBLIC_ NTSTATUS odb_open_file(struct odb_lock *lck, void *file_handle,
- uint32_t stream_id, uint32_t share_access,
- uint32_t access_mask, BOOL delete_on_close,
- const char *path,
+_PUBLIC_ NTSTATUS odb_open_file(struct odb_lock *lck,
+ void *file_handle, const char *path,
+ int *fd, bool allow_level_II_oplock,
uint32_t oplock_level, uint32_t *oplock_granted)
{
- struct odb_context *odb = lck->odb;
- struct opendb_entry e;
- int i;
- struct opendb_file file;
- NTSTATUS status;
-
- if (odb->oplocks == False) {
- oplock_level = OPLOCK_NONE;
- }
-
- status = odb_pull_record(lck, &file);
- if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
- /* initialise a blank structure */
- ZERO_STRUCT(file);
- file.path = path;
- } else {
- NT_STATUS_NOT_OK_RETURN(status);
- }
-
- /* see if it conflicts */
- e.server = odb->ntvfs_ctx->server_id;
- e.file_handle = file_handle;
- e.stream_id = stream_id;
- e.share_access = share_access;
- e.access_mask = access_mask;
- e.delete_on_close = delete_on_close;
- e.oplock_level = OPLOCK_NONE;
-
- /* see if anyone has an oplock, which we need to break */
- for (i=0;i<file.num_entries;i++) {
- if (file.entries[i].oplock_level == OPLOCK_BATCH) {
- /* a batch oplock caches close calls, which
- means the client application might have
- already closed the file. We have to allow
- this close to propogate by sending a oplock
- break request and suspending this call
- until the break is acknowledged or the file
- is closed */
- odb_oplock_break_send(odb, &file.entries[i]);
- return NT_STATUS_OPLOCK_NOT_GRANTED;
- }
- }
-
- if (file.delete_on_close ||
- (file.num_entries != 0 && delete_on_close)) {
- /* while delete on close is set, no new opens are allowed */
- return NT_STATUS_DELETE_PENDING;
- }
-
- /* check for sharing violations */
- for (i=0;i<file.num_entries;i++) {
- status = share_conflict(&file.entries[i], &e);
- NT_STATUS_NOT_OK_RETURN(status);
- }
-
- /* we now know the open could succeed, but we need to check
- for any exclusive oplocks. We can't grant a second open
- till these are broken. Note that we check for batch oplocks
- before checking for sharing violations, and check for
- exclusive oplocks afterwards. */
- for (i=0;i<file.num_entries;i++) {
- if (file.entries[i].oplock_level == OPLOCK_EXCLUSIVE) {
- odb_oplock_break_send(odb, &file.entries[i]);
- return NT_STATUS_OPLOCK_NOT_GRANTED;
- }
- }
-
- /*
- possibly grant an exclusive or batch oplock if this is the only client
- with the file open. We don't yet grant levelII oplocks.
- */
- if (oplock_granted != NULL) {
- if ((oplock_level == OPLOCK_BATCH ||
- oplock_level == OPLOCK_EXCLUSIVE) &&
- file.num_entries == 0) {
- (*oplock_granted) = oplock_level;
- } else {
- (*oplock_granted) = OPLOCK_NONE;
- }
- e.oplock_level = (*oplock_granted);
- }
-
- /* it doesn't conflict, so add it to the end */
- file.entries = talloc_realloc(lck, file.entries, struct opendb_entry,
- file.num_entries+1);
- NT_STATUS_HAVE_NO_MEMORY(file.entries);
-
- file.entries[file.num_entries] = e;
- file.num_entries++;
-
- return odb_push_record(lck, &file);
+ return ops->odb_open_file(lck, file_handle, path,
+ fd, allow_level_II_oplock,
+ oplock_level, oplock_granted);
}
*/
_PUBLIC_ NTSTATUS odb_open_file_pending(struct odb_lock *lck, void *private)
{
- struct odb_context *odb = lck->odb;
- struct opendb_file file;
- NTSTATUS status;
-
- status = odb_pull_record(lck, &file);
- NT_STATUS_NOT_OK_RETURN(status);
-
- file.pending = talloc_realloc(lck, file.pending, struct opendb_pending,
- file.num_pending+1);
- NT_STATUS_HAVE_NO_MEMORY(file.pending);
-
- file.pending[file.num_pending].server = odb->ntvfs_ctx->server_id;
- file.pending[file.num_pending].notify_ptr = private;
-
- file.num_pending++;
-
- return odb_push_record(lck, &file);
+ return ops->odb_open_file_pending(lck, private);
}
/*
remove a opendb entry
*/
-_PUBLIC_ NTSTATUS odb_close_file(struct odb_lock *lck, void *file_handle)
+_PUBLIC_ NTSTATUS odb_close_file(struct odb_lock *lck, void *file_handle,
+ const char **delete_path)
{
- struct odb_context *odb = lck->odb;
- struct opendb_file file;
- int i;
- NTSTATUS status;
-
- status = odb_pull_record(lck, &file);
- NT_STATUS_NOT_OK_RETURN(status);
-
- /* find the entry, and delete it */
- for (i=0;i<file.num_entries;i++) {
- if (file_handle == file.entries[i].file_handle &&
- cluster_id_equal(&odb->ntvfs_ctx->server_id, &file.entries[i].server)) {
- if (file.entries[i].delete_on_close) {
- file.delete_on_close = True;
- }
- if (i < file.num_entries-1) {
- memmove(file.entries+i, file.entries+i+1,
- (file.num_entries - (i+1)) *
- sizeof(struct opendb_entry));
- }
- break;
- }
- }
-
- if (i == file.num_entries) {
- return NT_STATUS_UNSUCCESSFUL;
- }
-
- /* send any pending notifications, removing them once sent */
- for (i=0;i<file.num_pending;i++) {
- messaging_send_ptr(odb->ntvfs_ctx->msg_ctx, file.pending[i].server,
- MSG_PVFS_RETRY_OPEN,
- file.pending[i].notify_ptr);
- }
- file.num_pending = 0;
-
- file.num_entries--;
-
- return odb_push_record(lck, &file);
+ return ops->odb_close_file(lck, file_handle, delete_path);
}
*/
_PUBLIC_ NTSTATUS odb_remove_pending(struct odb_lock *lck, void *private)
{
- struct odb_context *odb = lck->odb;
- int i;
- NTSTATUS status;
- struct opendb_file file;
-
- status = odb_pull_record(lck, &file);
- NT_STATUS_NOT_OK_RETURN(status);
-
- /* find the entry, and delete it */
- for (i=0;i<file.num_pending;i++) {
- if (private == file.pending[i].notify_ptr &&
- cluster_id_equal(&odb->ntvfs_ctx->server_id, &file.pending[i].server)) {
- if (i < file.num_pending-1) {
- memmove(file.pending+i, file.pending+i+1,
- (file.num_pending - (i+1)) *
- sizeof(struct opendb_pending));
- }
- break;
- }
- }
-
- if (i == file.num_pending) {
- return NT_STATUS_UNSUCCESSFUL;
- }
-
- file.num_pending--;
-
- return odb_push_record(lck, &file);
+ return ops->odb_remove_pending(lck, private);
}
*/
_PUBLIC_ NTSTATUS odb_rename(struct odb_lock *lck, const char *path)
{
- struct opendb_file file;
- NTSTATUS status;
-
- status = odb_pull_record(lck, &file);
- if (NT_STATUS_EQUAL(NT_STATUS_OBJECT_NAME_NOT_FOUND, status)) {
- /* not having the record at all is OK */
- return NT_STATUS_OK;
- }
- NT_STATUS_NOT_OK_RETURN(status);
+ return ops->odb_rename(lck, path);
+}
- file.path = path;
- return odb_push_record(lck, &file);
+/*
+ get back the path of an open file
+*/
+_PUBLIC_ NTSTATUS odb_get_path(struct odb_lock *lck, const char **path)
+{
+ return ops->odb_get_path(lck, path);
}
/*
update delete on close flag on an open file
*/
-_PUBLIC_ NTSTATUS odb_set_delete_on_close(struct odb_lock *lck, BOOL del_on_close)
+_PUBLIC_ NTSTATUS odb_set_delete_on_close(struct odb_lock *lck, bool del_on_close)
{
- NTSTATUS status;
- struct opendb_file file;
-
- status = odb_pull_record(lck, &file);
- NT_STATUS_NOT_OK_RETURN(status);
-
- file.delete_on_close = del_on_close;
-
- return odb_push_record(lck, &file);
+ return ops->odb_set_delete_on_close(lck, del_on_close);
}
/*
people still have the file open
*/
_PUBLIC_ NTSTATUS odb_get_delete_on_close(struct odb_context *odb,
- DATA_BLOB *key, BOOL *del_on_close,
- int *open_count, char **path)
+ DATA_BLOB *key, bool *del_on_close)
{
- NTSTATUS status;
- struct opendb_file file;
- struct odb_lock *lck;
-
- lck = odb_lock(odb, odb, key);
- NT_STATUS_HAVE_NO_MEMORY(lck);
-
- status = odb_pull_record(lck, &file);
- if (NT_STATUS_EQUAL(NT_STATUS_OBJECT_NAME_NOT_FOUND, status)) {
- talloc_free(lck);
- (*del_on_close) = False;
- return NT_STATUS_OK;
- }
- if (!NT_STATUS_IS_OK(status)) {
- talloc_free(lck);
- return status;
- }
-
- (*del_on_close) = file.delete_on_close;
- if (open_count != NULL) {
- (*open_count) = file.num_entries;
- }
- if (path != NULL) {
- *path = talloc_strdup(odb, file.path);
- NT_STATUS_HAVE_NO_MEMORY(*path);
- if (file.num_entries == 1 && file.entries[0].delete_on_close) {
- (*del_on_close) = True;
- }
- }
-
- talloc_free(lck);
-
- return NT_STATUS_OK;
+ return ops->odb_get_delete_on_close(odb, key, del_on_close);
}
create_options and access_mask
*/
_PUBLIC_ NTSTATUS odb_can_open(struct odb_lock *lck,
- uint32_t share_access, uint32_t create_options,
- uint32_t access_mask)
+ uint32_t stream_id, uint32_t share_access,
+ uint32_t access_mask, bool delete_on_close,
+ uint32_t open_disposition, bool break_to_none)
{
- struct odb_context *odb = lck->odb;
- NTSTATUS status;
- struct opendb_file file;
- struct opendb_entry e;
- int i;
-
- status = odb_pull_record(lck, &file);
- if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
- return NT_STATUS_OK;
- }
- NT_STATUS_NOT_OK_RETURN(status);
-
- if ((create_options & NTCREATEX_OPTIONS_DELETE_ON_CLOSE) &&
- file.num_entries != 0) {
- return NT_STATUS_SHARING_VIOLATION;
- }
-
- if (file.delete_on_close) {
- return NT_STATUS_DELETE_PENDING;
- }
+ return ops->odb_can_open(lck, stream_id, share_access, access_mask,
+ delete_on_close, open_disposition, break_to_none);
+}
- e.server = odb->ntvfs_ctx->server_id;
- e.file_handle = NULL;
- e.stream_id = 0;
- e.share_access = share_access;
- e.access_mask = access_mask;
-
- for (i=0;i<file.num_entries;i++) {
- status = share_conflict(&file.entries[i], &e);
- if (!NT_STATUS_IS_OK(status)) {
- /* note that we discard the error code
- here. We do this as unless we are actually
- doing an open (which comes via a different
- function), we need to return a sharing
- violation */
- return NT_STATUS_SHARING_VIOLATION;
- }
- }
+_PUBLIC_ NTSTATUS odb_update_oplock(struct odb_lock *lck, void *file_handle,
+ uint32_t oplock_level)
+{
+ return ops->odb_update_oplock(lck, file_handle, oplock_level);
+}
- return NT_STATUS_OK;
+_PUBLIC_ NTSTATUS odb_break_oplocks(struct odb_lock *lck)
+{
+ return ops->odb_break_oplocks(lck);
}
git.samba.org / jelmer / samba4-debian.git / blobdiff