summaryrefslogtreecommitdiffstats
path: root/source4/ntvfs/posix/pvfs_write.c
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 17:20:00 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 17:20:00 +0000
commit8daa83a594a2e98f39d764422bfbdbc62c9efd44 (patch)
tree4099e8021376c7d8c05bdf8503093d80e9c7bad0 /source4/ntvfs/posix/pvfs_write.c
parentInitial commit. (diff)
downloadsamba-8daa83a594a2e98f39d764422bfbdbc62c9efd44.tar.xz
samba-8daa83a594a2e98f39d764422bfbdbc62c9efd44.zip
Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'source4/ntvfs/posix/pvfs_write.c')
-rw-r--r--source4/ntvfs/posix/pvfs_write.c145
1 files changed, 145 insertions, 0 deletions
diff --git a/source4/ntvfs/posix/pvfs_write.c b/source4/ntvfs/posix/pvfs_write.c
new file mode 100644
index 0000000..9773325
--- /dev/null
+++ b/source4/ntvfs/posix/pvfs_write.c
@@ -0,0 +1,145 @@
+/*
+ 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 tevent_context *ev,
+ struct tevent_timer *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_usec(pvfs->writetime_delay);
+
+ h->write_time.update_triggered = true;
+ h->write_time.update_on_close = true;
+ h->write_time.update_event = tevent_add_timer(pvfs->ntvfs->ctx->event_ctx,
+ h, tv,
+ pvfs_write_time_update_handler,
+ h);
+ if (!h->write_time.update_event) {
+ DEBUG(0,("Failed tevent_add_timer\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 = talloc_get_type(ntvfs->private_data,
+ struct pvfs_state);
+ 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 {
+ 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;
+}