1 files changed, 276 insertions, 0 deletions
diff --git a/source4/ntvfs/posix/pvfs_unlink.c b/source4/ntvfs/posix/pvfs_unlink.c
new file mode 100644
index 0000000..605ec10
--- /dev/null
+++ b/source4/ntvfs/posix/pvfs_unlink.c
@@ -0,0 +1,276 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   POSIX NTVFS backend - unlink
+
+   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 3 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, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "vfs_posix.h"
+#include "system/dir.h"
+
+/*
+  retry an open after a sharing violation
+*/
+static void pvfs_retry_unlink(struct pvfs_odb_retry *r,
+			      struct ntvfs_module_context *ntvfs,
+			      struct ntvfs_request *req,
+			      void *_io,
+			      void *private_data,
+			      enum pvfs_wait_notice reason)
+{
+	union smb_unlink *io = talloc_get_type(_io, union smb_unlink);
+	NTSTATUS status = NT_STATUS_INTERNAL_ERROR;
+
+	talloc_free(r);
+
+	switch (reason) {
+	case PVFS_WAIT_CANCEL:
+/*TODO*/
+		status = NT_STATUS_CANCELLED;
+		break;
+	case PVFS_WAIT_TIMEOUT:
+		/* if it timed out, then give the failure
+		   immediately */
+/*TODO*/
+		status = NT_STATUS_SHARING_VIOLATION;
+		break;
+	case PVFS_WAIT_EVENT:
+
+		/* try the open again, which could trigger another retry setup
+		   if it wants to, so we have to unmark the async flag so we
+		   will know if it does a second async reply */
+		req->async_states->state &= ~NTVFS_ASYNC_STATE_ASYNC;
+
+		status = pvfs_unlink(ntvfs, req, io);
+		if (req->async_states->state & NTVFS_ASYNC_STATE_ASYNC) {
+			/* the 2nd try also replied async, so we don't send
+			   the reply yet */
+			return;
+		}
+
+		/* re-mark it async, just in case someone up the chain does
+		   paranoid checking */
+		req->async_states->state |= NTVFS_ASYNC_STATE_ASYNC;
+		break;
+	}
+
+	/* send the reply up the chain */
+	req->async_states->status = status;
+	req->async_states->send_fn(req);
+}
+
+/*
+  setup for a unlink retry after a sharing violation
+  or a non granted oplock
+*/
+static NTSTATUS pvfs_unlink_setup_retry(struct ntvfs_module_context *ntvfs,
+					struct ntvfs_request *req,
+					union smb_unlink *io,
+					struct odb_lock *lck,
+					NTSTATUS status)
+{
+	struct pvfs_state *pvfs = talloc_get_type(ntvfs->private_data,
+				  struct pvfs_state);
+	struct timeval end_time;
+
+	if (NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION)) {
+		end_time = timeval_add(&req->statistics.request_time,
+				       0, pvfs->sharing_violation_delay);
+	} else if (NT_STATUS_EQUAL(status, NT_STATUS_OPLOCK_NOT_GRANTED)) {
+		end_time = timeval_add(&req->statistics.request_time,
+				       pvfs->oplock_break_timeout, 0);
+	} else {
+		return NT_STATUS_INTERNAL_ERROR;
+	}
+
+	return pvfs_odb_retry_setup(ntvfs, req, lck, end_time, io, NULL,
+				    pvfs_retry_unlink);
+}
+
+
+/*
+  unlink a file
+*/
+static NTSTATUS pvfs_unlink_file(struct pvfs_state *pvfs,
+				 struct pvfs_filename *name)
+{
+	NTSTATUS status = NT_STATUS_OK;
+
+	if (name->dos.attrib & FILE_ATTRIBUTE_DIRECTORY) {
+		return NT_STATUS_FILE_IS_A_DIRECTORY;
+	}
+
+	if (name->st.st_nlink == 1) {
+		status = pvfs_xattr_unlink_hook(pvfs, name->full_name);
+		if (!NT_STATUS_IS_OK(status)) {
+			return status;
+		}
+	}
+
+	/* finally try the actual unlink */
+	if (pvfs_sys_unlink(pvfs, name->full_name, name->allow_override) == -1) {
+		status = pvfs_map_errno(pvfs, errno);
+	}
+
+	if (NT_STATUS_IS_OK(status)) {
+		notify_trigger(pvfs->notify_context, 
+			       NOTIFY_ACTION_REMOVED, 
+			       FILE_NOTIFY_CHANGE_FILE_NAME,
+			       name->full_name);
+	}
+
+	return status;
+}
+
+/*
+  unlink one file
+*/
+static NTSTATUS pvfs_unlink_one(struct pvfs_state *pvfs,
+				struct ntvfs_request *req,
+				union smb_unlink *unl,
+				struct pvfs_filename *name)
+{
+	NTSTATUS status;
+	struct odb_lock *lck = NULL;
+
+	/* make sure its matches the given attributes */
+	status = pvfs_match_attrib(pvfs, name,
+				   unl->unlink.in.attrib, 0);
+	if (!NT_STATUS_IS_OK(status)) {
+		return status;
+	}
+
+	status = pvfs_can_delete(pvfs, req, name, &lck);
+
+	/*
+	 * on a sharing violation we need to retry when the file is closed by
+	 * the other user, or after 1 second
+	 * on a non granted oplock we need to retry when the file is closed by
+	 * the other user, or after 30 seconds
+	 */
+	if ((NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION) ||
+	     NT_STATUS_EQUAL(status, NT_STATUS_OPLOCK_NOT_GRANTED)) &&
+	    (req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
+		return pvfs_unlink_setup_retry(pvfs->ntvfs, req, unl, lck, status);
+	}
+
+	if (!NT_STATUS_IS_OK(status)) {
+		return status;
+	}
+
+	if (name->stream_name) {
+		if (!name->stream_exists) {
+			return NT_STATUS_OBJECT_NAME_NOT_FOUND;
+		}
+
+		return pvfs_stream_delete(pvfs, name, -1);
+	}
+
+	return pvfs_unlink_file(pvfs, name);
+}
+
+/*
+  delete a file - the dirtype specifies the file types to include in the search. 
+  The name can contain CIFS wildcards, but rarely does (except with OS/2 clients)
+*/
+NTSTATUS pvfs_unlink(struct ntvfs_module_context *ntvfs,
+		     struct ntvfs_request *req,
+		     union smb_unlink *unl)
+{
+	struct pvfs_state *pvfs = talloc_get_type(ntvfs->private_data,
+				  struct pvfs_state);
+	struct pvfs_dir *dir;
+	NTSTATUS status;
+	uint32_t total_deleted=0;
+	struct pvfs_filename *name;
+	const char *fname;
+	off_t ofs;
+
+	/* resolve the cifs name to a posix name */
+	status = pvfs_resolve_name(pvfs, req, unl->unlink.in.pattern, 
+				   PVFS_RESOLVE_WILDCARD |
+				   PVFS_RESOLVE_STREAMS |
+				   PVFS_RESOLVE_NO_OPENDB,
+				   &name);
+	if (!NT_STATUS_IS_OK(status)) {
+		return status;
+	}
+
+	if (!name->exists && !name->has_wildcard) {
+		return NT_STATUS_OBJECT_NAME_NOT_FOUND;
+	}
+
+	if (name->exists && 
+	    (name->dos.attrib & FILE_ATTRIBUTE_DIRECTORY)) {
+		return NT_STATUS_FILE_IS_A_DIRECTORY;
+	}
+
+	if (!name->has_wildcard) {
+		return pvfs_unlink_one(pvfs, req, unl, name);
+	}
+
+	/*
+	 * disable async requests in the wildcard case
+	 * until we have proper tests for this
+	 */
+	req->async_states->state &= ~NTVFS_ASYNC_STATE_MAY_ASYNC;
+
+	/* get list of matching files */
+	status = pvfs_list_start(pvfs, name, req, &dir);
+	if (!NT_STATUS_IS_OK(status)) {
+		return status;
+	}
+
+	status = NT_STATUS_NO_SUCH_FILE;
+	talloc_free(name);
+
+	ofs = 0;
+
+	while ((fname = pvfs_list_next(dir, &ofs))) {
+		/* this seems to be a special case */
+		if ((unl->unlink.in.attrib & FILE_ATTRIBUTE_DIRECTORY) &&
+		    (ISDOT(fname) || ISDOTDOT(fname))) {
+			return NT_STATUS_OBJECT_NAME_INVALID;
+		}
+
+		/* get a pvfs_filename object */
+		status = pvfs_resolve_partial(pvfs, req,
+					      pvfs_list_unix_path(dir),
+					      fname,
+					      PVFS_RESOLVE_NO_OPENDB,
+					      &name);
+		if (!NT_STATUS_IS_OK(status)) {
+			return status;
+		}
+
+		status = pvfs_unlink_one(pvfs, req, unl, name);
+		if (NT_STATUS_IS_OK(status)) {
+			total_deleted++;
+		}
+
+		talloc_free(name);
+	}
+
+	if (total_deleted > 0) {
+		status = NT_STATUS_OK;
+	}
+
+	return status;
+}
+
+