diff options
Diffstat (limited to 'source4/ntvfs/posix/pvfs_write.c')
| -rw-r--r-- | source4/ntvfs/posix/pvfs_write.c | 145 |
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; +} |