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-rw-r--r--source4/ntvfs/posix/config.mk1
-rw-r--r--source4/ntvfs/posix/pvfs_notify.c141
-rw-r--r--source4/ntvfs/posix/pvfs_open.c3
-rw-r--r--source4/ntvfs/posix/pvfs_unlink.c5
-rw-r--r--source4/ntvfs/posix/vfs_posix.c8
-rw-r--r--source4/ntvfs/posix/vfs_posix.h4
6 files changed, 162 insertions, 0 deletions
diff --git a/source4/ntvfs/posix/config.mk b/source4/ntvfs/posix/config.mk
index ccf2c2d1a9..c49fbc88b7 100644
--- a/source4/ntvfs/posix/config.mk
+++ b/source4/ntvfs/posix/config.mk
@@ -29,6 +29,7 @@ OBJ_FILES = \
pvfs_xattr.o \
pvfs_streams.o \
pvfs_acl.o \
+ pvfs_notify.o \
xattr_system.o \
xattr_tdb.o
REQUIRED_SUBSYSTEMS = NDR_XATTR EXT_LIB_XATTR EXT_LIB_BLKID
diff --git a/source4/ntvfs/posix/pvfs_notify.c b/source4/ntvfs/posix/pvfs_notify.c
new file mode 100644
index 0000000000..566b6bc0e2
--- /dev/null
+++ b/source4/ntvfs/posix/pvfs_notify.c
@@ -0,0 +1,141 @@
+/*
+ Unix SMB/CIFS implementation.
+
+ POSIX NTVFS backend - notify
+
+ Copyright (C) Andrew Tridgell 2006
+
+ 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.
+*/
+
+#include "includes.h"
+#include "vfs_posix.h"
+#include "lib/messaging/irpc.h"
+#include "messaging/messaging.h"
+
+/* pending notifies buffer, hung off struct pvfs_file for open directories
+ that have used change notify */
+struct pvfs_notify_buffer {
+ struct pvfs_file *f;
+ uint32_t num_changes;
+ struct notify_changes *changes;
+ uint32_t max_buffer_size;
+ uint32_t current_buffer_size;
+ void *wait_handle;
+};
+
+
+/*
+ destroy a notify buffer. Called when the handle is closed
+ */
+static int pvfs_notify_destructor(void *ptr)
+{
+ struct pvfs_notify_buffer *n = talloc_get_type(ptr, struct pvfs_notify_buffer);
+ notify_remove(n->f->pvfs->notify_context, n);
+ n->f->notify_buffer = NULL;
+ return 0;
+}
+
+
+/*
+ called when a async notify event comes in
+*/
+static void pvfs_notify_callback(void *private, const struct notify_event *ev)
+{
+ struct pvfs_notify_buffer *n = talloc_get_type(private, struct pvfs_notify_buffer);
+ DEBUG(0,("got notify for '%s'\n", ev->path));
+}
+
+/*
+ setup a notify buffer on a directory handle
+*/
+static NTSTATUS pvfs_notify_setup(struct pvfs_state *pvfs, struct pvfs_file *f,
+ uint32_t buffer_size, uint32_t filter, BOOL recursive)
+{
+ NTSTATUS status;
+ struct notify_entry e;
+
+ f->notify_buffer = talloc_zero(f, struct pvfs_notify_buffer);
+ NT_STATUS_HAVE_NO_MEMORY(f->notify_buffer);
+
+ f->notify_buffer->max_buffer_size = buffer_size;
+ f->notify_buffer->f = f;
+
+ e.filter = filter;
+ e.path = f->handle->name->full_name;
+ e.recursive = recursive;
+
+ status = notify_add(pvfs->notify_context, &e,
+ pvfs_notify_callback, f->notify_buffer);
+ NT_STATUS_NOT_OK_RETURN(status);
+
+ talloc_set_destructor(f->notify_buffer, pvfs_notify_destructor);
+
+ return NT_STATUS_OK;
+}
+
+
+/* change notify request - always async. This request blocks until the
+ event buffer is non-empty */
+NTSTATUS pvfs_notify(struct ntvfs_module_context *ntvfs,
+ struct ntvfs_request *req,
+ struct smb_notify *info)
+{
+ struct pvfs_state *pvfs = talloc_get_type(ntvfs->private_data,
+ struct pvfs_state);
+ struct pvfs_file *f;
+ NTSTATUS status;
+
+ f = pvfs_find_fd(pvfs, req, info->in.file.fnum);
+ if (!f) {
+ return NT_STATUS_INVALID_HANDLE;
+ }
+
+ /* this request doesn't make sense unless its async */
+ if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ /* its only valid for directories */
+ if (f->handle->fd != -1) {
+ return NT_STATUS_NOT_A_DIRECTORY;
+ }
+
+ /* if the handle doesn't currently have a notify buffer then
+ create one */
+ if (f->notify_buffer == NULL) {
+ status = pvfs_notify_setup(pvfs, f,
+ info->in.buffer_size,
+ info->in.completion_filter,
+ info->in.recursive);
+ NT_STATUS_NOT_OK_RETURN(status);
+ }
+
+ /* if the buffer is empty then start waiting */
+ if (f->notify_buffer->num_changes == 0) {
+ req->async_states->state |= NTVFS_ASYNC_STATE_ASYNC;
+ return NT_STATUS_OK;
+ }
+
+ /* otherwise if the buffer is not empty then return its
+ contents immediately */
+ info->out.num_changes = f->notify_buffer->num_changes;
+ info->out.changes = talloc_steal(req, f->notify_buffer->changes);
+ f->notify_buffer->num_changes = 0;
+ f->notify_buffer->changes = NULL;
+ f->notify_buffer->current_buffer_size = 0;
+
+ return NT_STATUS_OK;
+}
diff --git a/source4/ntvfs/posix/pvfs_open.c b/source4/ntvfs/posix/pvfs_open.c
index 2724339323..3c3e13bc91 100644
--- a/source4/ntvfs/posix/pvfs_open.c
+++ b/source4/ntvfs/posix/pvfs_open.c
@@ -271,6 +271,7 @@ static NTSTATUS pvfs_open_directory(struct pvfs_state *pvfs,
f->share_access = io->generic.in.share_access;
f->impersonation = io->generic.in.impersonation;
f->access_mask = access_mask;
+ f->notify_buffer = NULL;
f->handle->pvfs = pvfs;
f->handle->name = talloc_steal(f->handle, name);
@@ -688,6 +689,7 @@ static NTSTATUS pvfs_create_file(struct pvfs_state *pvfs,
f->share_access = io->generic.in.share_access;
f->access_mask = access_mask;
f->impersonation = io->generic.in.impersonation;
+ f->notify_buffer = NULL;
f->handle->pvfs = pvfs;
f->handle->name = talloc_steal(f->handle, name);
@@ -1113,6 +1115,7 @@ NTSTATUS pvfs_open(struct ntvfs_module_context *ntvfs,
f->share_access = io->generic.in.share_access;
f->access_mask = access_mask;
f->impersonation = io->generic.in.impersonation;
+ f->notify_buffer = NULL;
f->handle->pvfs = pvfs;
f->handle->fd = -1;
diff --git a/source4/ntvfs/posix/pvfs_unlink.c b/source4/ntvfs/posix/pvfs_unlink.c
index 76c9bc10a4..3a6e4bba2f 100644
--- a/source4/ntvfs/posix/pvfs_unlink.c
+++ b/source4/ntvfs/posix/pvfs_unlink.c
@@ -103,6 +103,11 @@ static NTSTATUS pvfs_unlink_one(struct pvfs_state *pvfs,
status = pvfs_map_errno(pvfs, errno);
}
+ if (NT_STATUS_IS_OK(status)) {
+ notify_trigger(pvfs->notify_context, NOTIFY_ACTION_REMOVED,
+ name->full_name);
+ }
+
talloc_free(name);
return status;
diff --git a/source4/ntvfs/posix/vfs_posix.c b/source4/ntvfs/posix/vfs_posix.c
index cb441cb4c9..0469e54d35 100644
--- a/source4/ntvfs/posix/vfs_posix.c
+++ b/source4/ntvfs/posix/vfs_posix.c
@@ -185,6 +185,13 @@ static NTSTATUS pvfs_connect(struct ntvfs_module_context *ntvfs,
return NT_STATUS_INTERNAL_DB_CORRUPTION;
}
+ pvfs->notify_context = notify_init(pvfs,
+ pvfs->ntvfs->ctx->server_id,
+ pvfs->ntvfs->ctx->msg_ctx);
+ if (pvfs->notify_context == NULL) {
+ return NT_STATUS_INTERNAL_DB_CORRUPTION;
+ }
+
pvfs->sidmap = sidmap_open(pvfs);
if (pvfs->sidmap == NULL) {
return NT_STATUS_INTERNAL_DB_CORRUPTION;
@@ -317,6 +324,7 @@ NTSTATUS ntvfs_posix_init(void)
ops.logoff = pvfs_logoff;
ops.async_setup = pvfs_async_setup;
ops.cancel = pvfs_cancel;
+ ops.notify = pvfs_notify;
/* register ourselves with the NTVFS subsystem. We register
under the name 'default' as we wish to be the default
diff --git a/source4/ntvfs/posix/vfs_posix.h b/source4/ntvfs/posix/vfs_posix.h
index 59e4ec1abf..aa452c6a13 100644
--- a/source4/ntvfs/posix/vfs_posix.h
+++ b/source4/ntvfs/posix/vfs_posix.h
@@ -42,6 +42,7 @@ struct pvfs_state {
struct brl_context *brl_context;
struct odb_context *odb_context;
+ struct notify_context *notify_context;
struct sidmap_context *sidmap;
/* a list of pending async requests. Needed to support
@@ -179,6 +180,9 @@ struct pvfs_file {
/* a count of active locks - used to avoid calling brl_close on
file close */
uint64_t lock_count;
+
+ /* for directories, a buffer of pending notify events */
+ struct pvfs_notify_buffer *notify_buffer;
};
/* the state of a search started with pvfs_search_first() */
generated by cgit (git 2.34.1) at 2024-11-11 00:21:54 +0000