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6086a73f4e
This reverts commit 322574834f.
Not strictly a revert anymore, but for future work we do need "dirfsp"
in create_file_default() passed through the VFS.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
102 lines
2.9 KiB
C
102 lines
2.9 KiB
C
/*
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* VFS module to disallow writes for older files
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*
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* Copyright (C) 2013, Volker Lendecke
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*
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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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*
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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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*
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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 "smbd/smbd.h"
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#include "system/filesys.h"
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#include "libcli/security/security.h"
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static NTSTATUS vfs_worm_create_file(vfs_handle_struct *handle,
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struct smb_request *req,
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struct files_struct *dirfsp,
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struct smb_filename *smb_fname,
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uint32_t access_mask,
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uint32_t share_access,
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uint32_t create_disposition,
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uint32_t create_options,
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uint32_t file_attributes,
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uint32_t oplock_request,
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const struct smb2_lease *lease,
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uint64_t allocation_size,
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uint32_t private_flags,
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struct security_descriptor *sd,
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struct ea_list *ea_list,
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files_struct **result,
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int *pinfo,
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const struct smb2_create_blobs *in_context_blobs,
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struct smb2_create_blobs *out_context_blobs)
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{
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bool readonly = false;
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const uint32_t write_access_flags =
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FILE_WRITE_DATA | FILE_APPEND_DATA |
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FILE_WRITE_ATTRIBUTES | DELETE_ACCESS |
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WRITE_DAC_ACCESS | WRITE_OWNER_ACCESS;
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NTSTATUS status;
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if (VALID_STAT(smb_fname->st)) {
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double age;
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age = timespec_elapsed(&smb_fname->st.st_ex_ctime);
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if (age > lp_parm_int(SNUM(handle->conn), "worm",
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"grace_period", 3600)) {
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readonly = true;
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}
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}
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if (readonly && (access_mask & write_access_flags)) {
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return NT_STATUS_ACCESS_DENIED;
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}
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status = SMB_VFS_NEXT_CREATE_FILE(
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handle, req, dirfsp, smb_fname, access_mask,
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share_access, create_disposition, create_options,
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file_attributes, oplock_request, lease, allocation_size,
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private_flags, sd, ea_list, result, pinfo,
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in_context_blobs, out_context_blobs);
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if (!NT_STATUS_IS_OK(status)) {
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return status;
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}
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/*
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* Access via MAXIMUM_ALLOWED_ACCESS?
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*/
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if (readonly && ((*result)->access_mask & write_access_flags)) {
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close_file_free(req, result, NORMAL_CLOSE);
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return NT_STATUS_ACCESS_DENIED;
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}
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return NT_STATUS_OK;
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}
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static struct vfs_fn_pointers vfs_worm_fns = {
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.create_file_fn = vfs_worm_create_file,
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};
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static_decl_vfs;
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NTSTATUS vfs_worm_init(TALLOC_CTX *ctx)
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{
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NTSTATUS ret;
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ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "worm",
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&vfs_worm_fns);
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if (!NT_STATUS_IS_OK(ret)) {
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return ret;
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}
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return ret;
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}
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