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r22082: merged the ctdb changes from bzr

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added opendb ctdb backend from ronnie
(This used to be commit b0da25cb79f860bfa14ba7a8419c7996d936292b)
This commit is contained in:
Andrew Tridgell 2007-04-05 03:51:49 +00:00 committed by Gerald (Jerry) Carter
parent 7196090bfd
commit 66156220eb
9 changed files with 753 additions and 16 deletions
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93
source4/cluster/ctdb/common/ctdb_call.c
View File

@ -189,7 +189,7 @@ static void ctdb_call_send_dmaster(struct ctdb_db_context *ctdb_db,
r->hdr.srcnode = ctdb->vnn;
r->hdr.reqid = c->hdr.reqid;
r->db_id = c->db_id;
r->dmaster = header->laccessor;
r->dmaster = c->hdr.srcnode;
r->keylen = key->dsize;
r->datalen = data->dsize;
memcpy(&r->data[0], key->dptr, key->dsize);
@ -239,7 +239,7 @@ void ctdb_request_dmaster(struct ctdb_context *ctdb, struct ctdb_req_header *hdr
ctdb_send_error(ctdb, hdr, ret, "Unknown database in request. db_id==0x%08x",c->db_id);
return;
}
/* fetch the current record */
ret = ctdb_ltdb_fetch(ctdb_db, key, &header, &data2);
if (ret != 0) {
@ -329,9 +329,12 @@ void ctdb_request_call(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
}
/* if this nodes has done enough consecutive calls on the same record
then give them the record */
if (header.laccessor == c->hdr.srcnode &&
header.lacount >= ctdb->max_lacount) {
then give them the record
or if the node requested an immediate migration
*/
if ( (header.laccessor == c->hdr.srcnode
&& header.lacount >= ctdb->max_lacount)
|| c->flags&CTDB_IMMEDIATE_MIGRATION ) {
ctdb_call_send_dmaster(ctdb_db, c, &header, &call.key, &data);
talloc_free(data.dptr);
return;
@ -373,6 +376,7 @@ struct ctdb_call_state {
struct ctdb_call call;
int redirect_count;
struct ctdb_ltdb_header header;
void *fetch_private;
};
@ -419,7 +423,6 @@ void ctdb_reply_dmaster(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
}
ctdb_db = state->ctdb_db;
data.dptr = c->data;
data.dsize = c->datalen;
@ -578,6 +581,7 @@ struct ctdb_call_state *ctdb_call_send(struct ctdb_db_context *ctdb_db, struct c
state->c->hdr.srcnode = ctdb->vnn;
/* this limits us to 16k outstanding messages - not unreasonable */
state->c->hdr.reqid = idr_get_new(ctdb->idr, state, 0xFFFF);
state->c->flags = call->flags;
state->c->db_id = ctdb_db->db_id;
state->c->callid = call->call_id;
state->c->keylen = call->key.dsize;
@ -604,6 +608,13 @@ struct ctdb_call_state *ctdb_call_send(struct ctdb_db_context *ctdb_db, struct c
}
struct ctdb_record_handle {
struct ctdb_db_context *ctdb_db;
TDB_DATA key;
TDB_DATA *data;
};
/*
make a remote ctdb call - async recv.
@ -612,6 +623,8 @@ struct ctdb_call_state *ctdb_call_send(struct ctdb_db_context *ctdb_db, struct c
*/
int ctdb_call_recv(struct ctdb_call_state *state, struct ctdb_call *call)
{
struct ctdb_record_handle *rec;
while (state->state < CTDB_CALL_DONE) {
event_loop_once(state->node->ctdb->ev);
}
@ -620,6 +633,18 @@ int ctdb_call_recv(struct ctdb_call_state *state, struct ctdb_call *call)
talloc_free(state);
return -1;
}
rec = state->fetch_private;
/* ugly hack to manage forced migration */
if (rec != NULL) {
rec->data->dptr = talloc_memdup(rec, state->call.reply_data.dptr,
state->call.reply_data.dsize);
rec->data->dsize = state->call.reply_data.dsize;
talloc_free(state);
return 0;
}
if (state->call.reply_data.dsize) {
call->reply_data.dptr = talloc_memdup(state->node->ctdb,
state->call.reply_data.dptr,
@ -643,3 +668,59 @@ int ctdb_call(struct ctdb_db_context *ctdb_db, struct ctdb_call *call)
state = ctdb_call_send(ctdb_db, call);
return ctdb_call_recv(state, call);
}
struct ctdb_record_handle *ctdb_fetch_lock(struct ctdb_db_context *ctdb_db, TALLOC_CTX *mem_ctx,
TDB_DATA key, TDB_DATA *data)
{
struct ctdb_call call;
struct ctdb_record_handle *rec;
struct ctdb_call_state *state;
int ret;
ZERO_STRUCT(call);
call.call_id = CTDB_FETCH_FUNC;
call.key = key;
call.flags = CTDB_IMMEDIATE_MIGRATION;
rec = talloc(mem_ctx, struct ctdb_record_handle);
CTDB_NO_MEMORY_NULL(ctdb_db->ctdb, rec);
rec->ctdb_db = ctdb_db;
rec->key = key;
rec->key.dptr = talloc_memdup(rec, key.dptr, key.dsize);
rec->data = data;
state = ctdb_call_send(ctdb_db, &call);
state->fetch_private = rec;
ret = ctdb_call_recv(state, &call);
if (ret != 0) {
talloc_free(rec);
return NULL;
}
return rec;
}
int ctdb_record_store(struct ctdb_record_handle *rec, TDB_DATA data)
{
int ret;
struct ctdb_ltdb_header header;
/* should be avoided if possible hang header off rec ? */
ret = ctdb_ltdb_fetch(rec->ctdb_db, rec->key, &header, NULL);
if (ret) {
ctdb_set_error(rec->ctdb_db->ctdb, "Fetch of locally held record failed");
return ret;
}
ret = ctdb_ltdb_store(rec->ctdb_db, rec->key, &header, data);
return ret;
}

42
source4/cluster/ctdb/common/ctdb_ltdb.c
View File

@ -41,6 +41,17 @@ struct ctdb_db_context *ctdb_db_handle(struct ctdb_context *ctdb, const char *na
return NULL;
}
/*
this is the dummy null procedure that all databases support
*/
static int ctdb_fetch_func(struct ctdb_call_info *call)
{
call->reply_data = &call->record_data;
return 0;
}
/*
attach to a specific database
*/
@ -49,6 +60,7 @@ struct ctdb_db_context *ctdb_attach(struct ctdb_context *ctdb, const char *name,
{
struct ctdb_db_context *ctdb_db, *tmp_db;
TDB_DATA data;
int ret;
ctdb_db = talloc_zero(ctdb, struct ctdb_db_context);
CTDB_NO_MEMORY_NULL(ctdb, ctdb_db);
@ -80,7 +92,18 @@ struct ctdb_db_context *ctdb_attach(struct ctdb_context *ctdb, const char *name,
return NULL;
}
/*
all databases support the "fetch" function. we need this in order to do forced migration of records
*/
ret = ctdb_set_call(ctdb_db, ctdb_fetch_func, CTDB_FETCH_FUNC);
if (ret != 0) {
talloc_free(ctdb_db);
return NULL;
}
DLIST_ADD(ctdb->db_list, ctdb_db);
return ctdb_db;
}
@ -124,18 +147,25 @@ int ctdb_ltdb_fetch(struct ctdb_db_context *ctdb_db,
/* return an initial header */
free(rec.dptr);
ltdb_initial_header(ctdb_db, key, header);
data->dptr = NULL;
data->dsize = 0;
if (data) {
data->dptr = NULL;
data->dsize = 0;
}
return 0;
}
*header = *(struct ctdb_ltdb_header *)rec.dptr;
data->dsize = rec.dsize - sizeof(struct ctdb_ltdb_header);
data->dptr = talloc_memdup(ctdb_db, sizeof(struct ctdb_ltdb_header)+rec.dptr,
data->dsize);
if (data) {
data->dsize = rec.dsize - sizeof(struct ctdb_ltdb_header);
data->dptr = talloc_memdup(ctdb_db, sizeof(struct ctdb_ltdb_header)+rec.dptr,
data->dsize);
}
free(rec.dptr);
CTDB_NO_MEMORY(ctdb, data->dptr);
if (data) {
CTDB_NO_MEMORY(ctdb, data->dptr);
}
return 0;
}

4
source4/cluster/ctdb/config.mk
View File

@ -2,6 +2,10 @@
[SUBSYSTEM::brlock_ctdb]
OBJ_FILES = brlock_ctdb.o
##################
[SUBSYSTEM::opendb_ctdb]
OBJ_FILES = opendb_ctdb.o
##################
[SUBSYSTEM::ctdb_tcp]
OBJ_FILES = \

6
source4/cluster/ctdb/include/ctdb.h
View File

@ -21,12 +21,14 @@
#ifndef _CTDB_H
#define _CTDB_H
#define CTDB_IMMEDIATE_MIGRATION 0x00000001
struct ctdb_call {
int call_id;
TDB_DATA key;
TDB_DATA call_data;
TDB_DATA reply_data;
uint32_t status;
uint32_t flags;
};
/*
@ -148,6 +150,7 @@ int ctdb_set_message_handler(struct ctdb_context *ctdb, ctdb_message_fn_t handle
int ctdb_send_message(struct ctdb_context *ctdb, uint32_t vnn,
uint32_t srvid, TDB_DATA data);
/*
fetch and lock a ctdb record. Underneath this will force the
dmaster for the record to be moved to the local node.
@ -155,7 +158,7 @@ int ctdb_send_message(struct ctdb_context *ctdb, uint32_t vnn,
The lock is released when is talloc_free() is called on the
returned ctdb_record_handle.
*/
struct ctdb_record_handle *ctdb_fetch_lock(struct ctdb_db_context *ctdb_db, TDB_DATA key, TDB_DATA *data);
struct ctdb_record_handle *ctdb_fetch_lock(struct ctdb_db_context *ctdb_db, TALLOC_CTX *mem_ctx, TDB_DATA key, TDB_DATA *data);
/*
change the data in a record held with a ctdb_record_handle
@ -163,4 +166,5 @@ struct ctdb_record_handle *ctdb_fetch_lock(struct ctdb_db_context *ctdb_db, TDB_
*/
int ctdb_record_store(struct ctdb_record_handle *rec, TDB_DATA data);
#endif

3
source4/cluster/ctdb/include/ctdb_private.h
View File

@ -23,6 +23,8 @@
#include "ctdb.h"
#define CTDB_FETCH_FUNC 0xf0000001
/*
an installed ctdb remote call
*/
@ -166,6 +168,7 @@ struct ctdb_req_header {
struct ctdb_req_call {
struct ctdb_req_header hdr;
uint32_t flags;
uint32_t db_id;
uint32_t callid;
uint32_t keylen;

611
source4/cluster/ctdb/opendb_ctdb.c Normal file
View File

@ -0,0 +1,611 @@
/*
Unix SMB/CIFS implementation.
Copyright (C) Andrew Tridgell 2004
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
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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.
*/
/*
this is the open files database, ctdb backend. It implements shared
storage of what files are open between server instances, and
implements the rules of shared access to files.
The caller needs to provide a file_key, which specifies what file
they are talking about. This needs to be a unique key across all
filesystems, and is usually implemented in terms of a device/inode
pair.
Before any operations can be performed the caller needs to establish
a lock on the record associated with file_key. That is done by
calling odb_lock(). The caller releases this lock by calling
talloc_free() on the returned handle.
All other operations on a record are done by passing the odb_lock()
handle back to this module. The handle contains internal
information about what file_key is being operated on.
*/
#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 "include/ctdb.h"
struct odb_context {
struct ctdb_context *ctdb;
struct ctdb_db_context *ctdb_db;
struct ntvfs_context *ntvfs_ctx;
BOOL oplocks;
};
/*
an odb lock handle. You must obtain one of these using odb_lock() before doing
any other operations.
*/
struct odb_lock {
struct odb_context *odb;
struct ctdb_record_handle *rec;
TDB_DATA key;
TDB_DATA data;
};
/*
Open up the openfiles.tdb database. Close it down using
talloc_free(). We need the messaging_ctx to allow for pending open
notifications.
*/
static struct odb_context *odb_ctdb_init(TALLOC_CTX *mem_ctx,
struct ntvfs_context *ntvfs_ctx)
{
struct odb_context *odb;
struct ctdb_context *ctdb = talloc_get_type(cluster_backend_handle(),
struct ctdb_context);
odb = talloc(mem_ctx, struct odb_context);
if (odb == NULL) {
return NULL;
}
odb->ctdb = ctdb;
odb->ctdb_db = ctdb_db_handle(ctdb, "opendb");
if (!odb->ctdb_db) {
DEBUG(0,("Failed to get attached ctdb db handle for opendb\n"));
talloc_free(odb);
return NULL;
}
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;
}
/*
get a lock on a entry in the odb. This call returns a lock handle,
which the caller should unlock using talloc_free().
*/
static struct odb_lock *odb_ctdb_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;
}
lck->rec = ctdb_fetch_lock(odb->ctdb_db, (TALLOC_CTX *)lck, lck->key, &lck->data);
if (!lck->rec) {
talloc_free(lck);
return NULL;
}
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)
{
TDB_DATA dbuf;
DATA_BLOB blob;
NTSTATUS status;
dbuf = lck->data;
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);
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)
{
TDB_DATA dbuf;
DATA_BLOB blob;
NTSTATUS status;
int ret;
if (!file->num_entries) {
dbuf.dptr = NULL;
dbuf.dsize = 0;
ctdb_record_store(lck->rec, dbuf);
}
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 = ctdb_record_store(lck->rec, dbuf);
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
rules
Note that the path is only used by the delete on close logic, not
for comparing with other filenames
*/
static NTSTATUS odb_ctdb_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,
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);
}
/*
register a pending open file in the open files database
*/
static NTSTATUS odb_ctdb_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);
}
/*
remove a opendb entry
*/
static NTSTATUS odb_ctdb_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);
}
/*
remove a pending opendb entry
*/
static NTSTATUS odb_ctdb_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);
}
/*
rename the path in a open file
*/
static NTSTATUS odb_ctdb_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);
}
/*
update delete on close flag on an open file
*/
static NTSTATUS odb_ctdb_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 the current value of the delete_on_close bit, and how many
people still have the file open
*/
static NTSTATUS odb_ctdb_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;
}
/*
determine if a file can be opened with the given share_access,
create_options and access_mask
*/
static NTSTATUS odb_ctdb_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;
}
static const struct opendb_ops opendb_ctdb_ops = {
.odb_init = odb_ctdb_init,
.odb_lock = odb_ctdb_lock,
.odb_open_file = odb_ctdb_open_file,
.odb_open_file_pending = odb_ctdb_open_file_pending,
.odb_close_file = odb_ctdb_close_file,
.odb_remove_pending = odb_ctdb_remove_pending,
.odb_rename = odb_ctdb_rename,
.odb_set_delete_on_close = odb_ctdb_set_delete_on_close,
.odb_get_delete_on_close = odb_ctdb_get_delete_on_close,
.odb_can_open = odb_ctdb_can_open
};
void odb_ctdb_init_ops(void)
{
odb_set_ops(&opendb_ctdb_ops);
}

2
source4/ntvfs/common/config.mk
View File

@ -10,6 +10,6 @@ OBJ_FILES = \
opendb_tdb.o \
notify.o
PUBLIC_DEPENDENCIES = NDR_OPENDB NDR_NOTIFY sys_notify share
PRIVATE_DEPENDENCIES = brlock_ctdb
PRIVATE_DEPENDENCIES = brlock_ctdb opendb_ctdb
# End LIBRARY ntvfs_common
################################################

6
source4/ntvfs/common/opendb.c
View File

@ -62,7 +62,11 @@ _PUBLIC_ struct odb_context *odb_init(TALLOC_CTX *mem_ctx,
struct ntvfs_context *ntvfs_ctx)
{
if (ops == NULL) {
odb_tdb_init_ops();
if (lp_parm_bool(-1, "ctdb", "opendb", False)) {
odb_ctdb_init_ops();
} else {
odb_tdb_init_ops();
}
}
return ops->odb_init(mem_ctx, ntvfs_ctx);
}

2
source4/ntvfs/common/opendb.h
View File

@ -46,4 +46,4 @@ struct opendb_ops {
void odb_set_ops(const struct opendb_ops *new_ops);
void odb_tdb_init_ops(void);
void odb_ctdb_init_ops(void);