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Diffstat (limited to 'source4/ntvfs/common/opendb.c')
-rw-r--r--source4/ntvfs/common/opendb.c478
1 files changed, 20 insertions, 458 deletions
diff --git a/source4/ntvfs/common/opendb.c b/source4/ntvfs/common/opendb.c
index 875f90760c..c17b819c04 100644
--- a/source4/ntvfs/common/opendb.c
+++ b/source4/ntvfs/common/opendb.c
@@ -39,30 +39,19 @@
*/
#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"
-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
@@ -72,34 +61,10 @@ struct odb_lock {
_PUBLIC_ struct odb_context *odb_init(TALLOC_CTX *mem_ctx,
struct ntvfs_context *ntvfs_ctx)
{
- struct odb_context *odb;
-
- odb = talloc(mem_ctx, struct odb_context);
- if (odb == NULL) {
- return NULL;
- }
-
- odb->w = cluster_tdb_tmp_open(odb, "openfiles.tdb", TDB_DEFAULT);
- if (odb->w == NULL) {
- talloc_free(odb);
- return NULL;
+ if (ops == NULL) {
+ 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);
}
/*
@@ -109,153 +74,9 @@ static int odb_lock_destructor(struct odb_lock *lck)
_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;
+ return ops->odb_lock(mem_ctx, odb, file_key);
}
-/*
- 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;
-}
-
-/*
- 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)
-{
- 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);
-}
/*
register an open file in the open files database. This implements the share_access
@@ -270,97 +91,9 @@ _PUBLIC_ NTSTATUS odb_open_file(struct odb_lock *lck, void *file_handle,
const char *path,
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, stream_id, share_access,
+ access_mask, delete_on_close, path, oplock_level,
+ oplock_granted);
}
@@ -369,23 +102,7 @@ _PUBLIC_ NTSTATUS odb_open_file(struct odb_lock *lck, void *file_handle,
*/
_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);
}
@@ -394,45 +111,7 @@ _PUBLIC_ NTSTATUS odb_open_file_pending(struct odb_lock *lck, void *private)
*/
_PUBLIC_ NTSTATUS odb_close_file(struct odb_lock *lck, void *file_handle)
{
- 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);
}
@@ -441,34 +120,7 @@ _PUBLIC_ NTSTATUS odb_close_file(struct odb_lock *lck, void *file_handle)
*/
_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);
}
@@ -477,18 +129,7 @@ _PUBLIC_ NTSTATUS odb_remove_pending(struct odb_lock *lck, void *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);
-
- file.path = path;
- return odb_push_record(lck, &file);
+ return ops->odb_rename(lck, path);
}
/*
@@ -496,15 +137,7 @@ _PUBLIC_ NTSTATUS odb_rename(struct odb_lock *lck, const char *path)
*/
_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);
}
/*
@@ -515,39 +148,7 @@ _PUBLIC_ NTSTATUS odb_get_delete_on_close(struct odb_context *odb,
DATA_BLOB *key, BOOL *del_on_close,
int *open_count, char **path)
{
- 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, open_count, path);
}
@@ -559,44 +160,5 @@ _PUBLIC_ NTSTATUS odb_can_open(struct odb_lock *lck,
uint32_t share_access, uint32_t create_options,
uint32_t access_mask)
{
- 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;
- }
-
- 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;
- }
- }
-
- return NT_STATUS_OK;
+ return ops->odb_can_open(lck, share_access, create_options, access_mask);
}