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/*
Unix SMB/CIFS implementation.
POSIX NTVFS backend - write
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 "librpc/gen_ndr/security.h"
#include "lib/events/events.h"
static void pvfs_write_time_update_handler(struct event_context *ev,
struct timed_event *te,
struct timeval tv,
void *private_data)
{
struct pvfs_file_handle *h = talloc_get_type(private_data,
struct pvfs_file_handle);
struct odb_lock *lck;
NTSTATUS status;
NTTIME write_time;
lck = odb_lock(h, h->pvfs->odb_context, &h->odb_locking_key);
if (lck == NULL) {
DEBUG(0,("Unable to lock opendb for write time update\n"));
return;
}
write_time = timeval_to_nttime(&tv);
status = odb_set_write_time(lck, write_time, false);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("Unable to update write time: %s\n",
nt_errstr(status)));
return;
}
talloc_free(lck);
h->write_time.update_event = NULL;
}
static void pvfs_trigger_write_time_update(struct pvfs_file_handle *h)
{
struct pvfs_state *pvfs = h->pvfs;
struct timeval tv;
if (h->write_time.update_triggered) {
return;
}
tv = timeval_current_ofs(0, pvfs->writetime_delay);
h->write_time.update_triggered = true;
h->write_time.update_on_close = true;
h->write_time.update_event = event_add_timed(pvfs->ntvfs->ctx->event_ctx,
h, tv,
pvfs_write_time_update_handler,
h);
if (!h->write_time.update_event) {
DEBUG(0,("Failed event_add_timed\n"));
}
}
/*
write to a file
*/
NTSTATUS pvfs_write(struct ntvfs_module_context *ntvfs,
struct ntvfs_request *req, union smb_write *wr)
{
struct pvfs_state *pvfs = ntvfs->private_data;
ssize_t ret;
struct pvfs_file *f;
NTSTATUS status;
if (wr->generic.level != RAW_WRITE_WRITEX) {
return ntvfs_map_write(ntvfs, req, wr);
}
f = pvfs_find_fd(pvfs, req, wr->writex.in.file.ntvfs);
if (!f) {
return NT_STATUS_INVALID_HANDLE;
}
if (f->handle->fd == -1) {
return NT_STATUS_INVALID_DEVICE_REQUEST;
}
if (!(f->access_mask & (SEC_FILE_WRITE_DATA | SEC_FILE_APPEND_DATA))) {
return NT_STATUS_ACCESS_DENIED;
}
status = pvfs_check_lock(pvfs, f, req->smbpid,
wr->writex.in.offset,
wr->writex.in.count,
WRITE_LOCK);
NT_STATUS_NOT_OK_RETURN(status);
status = pvfs_break_level2_oplocks(f);
NT_STATUS_NOT_OK_RETURN(status);
pvfs_trigger_write_time_update(f->handle);
if (f->handle->name->stream_name) {
ret = pvfs_stream_write(pvfs,
f->handle,
wr->writex.in.data,
wr->writex.in.count,
wr->writex.in.offset);
} else {
#if HAVE_LINUX_AIO
/* possibly try an aio write */
if ((req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC) &&
(pvfs->flags & PVFS_FLAG_LINUX_AIO)) {
status = pvfs_aio_pwrite(req, wr, f);
if (NT_STATUS_IS_OK(status)) {
return NT_STATUS_OK;
}
}
#endif
ret = pwrite(f->handle->fd,
wr->writex.in.data,
wr->writex.in.count,
wr->writex.in.offset);
}
if (ret == -1) {
if (errno == EFBIG) {
return NT_STATUS_INVALID_PARAMETER;
}
return pvfs_map_errno(pvfs, errno);
}
f->handle->seek_offset = wr->writex.in.offset + ret;
wr->writex.out.nwritten = ret;
wr->writex.out.remaining = 0; /* should fill this in? */
return NT_STATUS_OK;
}
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