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f236c42fb7
This is only used for print files. Storing it in the fd_handle seems overkill to me, this can easily be stored directly in the fsp itself, we have a flag for this. Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
148 lines
3.2 KiB
C
148 lines
3.2 KiB
C
/*
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Unix SMB/CIFS implementation.
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fd_handle structure handling
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Copyright (C) Ralph Boehme 2020
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "fd_handle.h"
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struct fd_handle {
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size_t ref_count;
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int fd;
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uint64_t position_information;
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off_t pos;
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/*
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* NT Create options, but we only look at
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* NTCREATEX_FLAG_DENY_DOS and
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* NTCREATEX_FLAG_DENY_FCB.
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*/
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uint32_t private_options;
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uint64_t gen_id;
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};
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static int fd_handle_destructor(struct fd_handle *fh)
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{
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SMB_ASSERT((fh->fd == -1) || (fh->fd == AT_FDCWD));
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return 0;
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}
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struct fd_handle *fd_handle_create(TALLOC_CTX *mem_ctx)
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{
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struct fd_handle *fh = NULL;
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fh = talloc_zero(mem_ctx, struct fd_handle);
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if (fh == NULL) {
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return NULL;
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}
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fh->fd = -1;
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talloc_set_destructor(fh, fd_handle_destructor);
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return fh;
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}
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size_t fh_get_refcount(struct fd_handle *fh)
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{
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return fh->ref_count;
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}
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void fh_set_refcount(struct fd_handle *fh, size_t ref_count)
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{
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fh->ref_count = ref_count;
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}
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uint64_t fh_get_position_information(struct fd_handle *fh)
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{
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return fh->position_information;
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}
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void fh_set_position_information(struct fd_handle *fh, uint64_t posinfo)
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{
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fh->position_information = posinfo;
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}
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off_t fh_get_pos(struct fd_handle *fh)
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{
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return fh->pos;
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}
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void fh_set_pos(struct fd_handle *fh, off_t pos)
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{
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fh->pos = pos;
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}
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uint32_t fh_get_private_options(struct fd_handle *fh)
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{
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return fh->private_options;
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}
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void fh_set_private_options(struct fd_handle *fh, uint32_t private_options)
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{
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fh->private_options = private_options;
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}
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uint64_t fh_get_gen_id(struct fd_handle *fh)
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{
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return fh->gen_id;
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}
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void fh_set_gen_id(struct fd_handle *fh, uint64_t gen_id)
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{
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fh->gen_id = gen_id;
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}
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/****************************************************************************
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Helper functions for working with fsp->fh->fd
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****************************************************************************/
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int fsp_get_io_fd(const struct files_struct *fsp)
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{
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if (fsp->fsp_flags.is_pathref) {
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DBG_ERR("fsp [%s] is a path referencing fsp\n",
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fsp_str_dbg(fsp));
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#ifdef DEVELOPER
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smb_panic("fsp is a pathref");
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#endif
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return -1;
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}
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return fsp->fh->fd;
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}
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int fsp_get_pathref_fd(const struct files_struct *fsp)
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{
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return fsp->fh->fd;
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}
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void fsp_set_fd(struct files_struct *fsp, int fd)
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{
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/*
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* Deliberatly allow setting an fd if the existing fd is the
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* same. This happens if a VFS module assigns the fd to
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* fsp->fh->fd in its openat VFS function. The canonical place
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* where the assignment is done is in fd_open(), but some VFS
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* modules do it anyway.
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*/
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SMB_ASSERT(fsp->fh->fd == -1 ||
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fsp->fh->fd == fd ||
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fd == -1 ||
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fd == AT_FDCWD);
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fsp->fh->fd = fd;
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}
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