From 8daa83a594a2e98f39d764422bfbdbc62c9efd44 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 19:20:00 +0200 Subject: Adding upstream version 2:4.20.0+dfsg. Signed-off-by: Daniel Baumann --- source3/smbd/fd_handle.c | 147 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 147 insertions(+) create mode 100644 source3/smbd/fd_handle.c (limited to 'source3/smbd/fd_handle.c') diff --git a/source3/smbd/fd_handle.c b/source3/smbd/fd_handle.c new file mode 100644 index 0000000..eb7fa55 --- /dev/null +++ b/source3/smbd/fd_handle.c @@ -0,0 +1,147 @@ +/* + Unix SMB/CIFS implementation. + fd_handle structure handling + Copyright (C) Ralph Boehme 2020 + + 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 . +*/ + +#include "includes.h" +#include "fd_handle.h" + +struct fd_handle { + size_t ref_count; + int fd; + uint64_t position_information; + off_t pos; + /* + * NT Create options, but we only look at + * NTCREATEX_FLAG_DENY_DOS and + * NTCREATEX_FLAG_DENY_FCB. + */ + uint32_t private_options; + uint64_t gen_id; +}; + +static int fd_handle_destructor(struct fd_handle *fh) +{ + SMB_ASSERT((fh->fd == -1) || (fh->fd == AT_FDCWD)); + return 0; +} + +struct fd_handle *fd_handle_create(TALLOC_CTX *mem_ctx) +{ + struct fd_handle *fh = NULL; + + fh = talloc_zero(mem_ctx, struct fd_handle); + if (fh == NULL) { + return NULL; + } + fh->fd = -1; + + talloc_set_destructor(fh, fd_handle_destructor); + + return fh; +} + +size_t fh_get_refcount(struct fd_handle *fh) +{ + return fh->ref_count; +} + +void fh_set_refcount(struct fd_handle *fh, size_t ref_count) +{ + fh->ref_count = ref_count; +} + +uint64_t fh_get_position_information(struct fd_handle *fh) +{ + return fh->position_information; +} + +void fh_set_position_information(struct fd_handle *fh, uint64_t posinfo) +{ + fh->position_information = posinfo; +} + +off_t fh_get_pos(struct fd_handle *fh) +{ + return fh->pos; +} + +void fh_set_pos(struct fd_handle *fh, off_t pos) +{ + fh->pos = pos; +} + +uint32_t fh_get_private_options(struct fd_handle *fh) +{ + return fh->private_options; +} + +void fh_set_private_options(struct fd_handle *fh, uint32_t private_options) +{ + fh->private_options = private_options; +} + +uint64_t fh_get_gen_id(struct fd_handle *fh) +{ + return fh->gen_id; +} + +void fh_set_gen_id(struct fd_handle *fh, uint64_t gen_id) +{ + fh->gen_id = gen_id; +} + +/**************************************************************************** + Helper functions for working with fsp->fh->fd +****************************************************************************/ + +int fsp_get_io_fd(const struct files_struct *fsp) +{ + if (fsp->fsp_flags.is_pathref) { + DBG_ERR("fsp [%s] is a path referencing fsp\n", + fsp_str_dbg(fsp)); +#ifdef DEVELOPER + smb_panic("fsp is a pathref"); +#endif + return -1; + } + + return fsp->fh->fd; +} + +int fsp_get_pathref_fd(const struct files_struct *fsp) +{ + return fsp->fh->fd; +} + +void fsp_set_fd(struct files_struct *fsp, int fd) +{ + /* + * Deliberately allow setting an fd if the existing fd is the + * same. This happens if a VFS module assigns the fd to + * fsp->fh->fd in its openat VFS function. The canonical place + * where the assignment is done is in fd_open(), but some VFS + * modules do it anyway. + */ + + SMB_ASSERT(fsp->fh->fd == -1 || + fsp->fh->fd == fd || + fd == -1 || + fd == AT_FDCWD); + + fsp->fh->fd = fd; +} -- cgit v1.2.3