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49ca690b4b
This patch introduces
struct stat_ex {
dev_t st_ex_dev;
ino_t st_ex_ino;
mode_t st_ex_mode;
nlink_t st_ex_nlink;
uid_t st_ex_uid;
gid_t st_ex_gid;
dev_t st_ex_rdev;
off_t st_ex_size;
struct timespec st_ex_atime;
struct timespec st_ex_mtime;
struct timespec st_ex_ctime;
struct timespec st_ex_btime; /* birthtime */
blksize_t st_ex_blksize;
blkcnt_t st_ex_blocks;
};
typedef struct stat_ex SMB_STRUCT_STAT;
It is really large because due to the friendly libc headers playing macro
tricks with fields like st_ino, so I renamed them to st_ex_xxx.
Why this change? To support birthtime, we already have quite a few #ifdef's at
places where it does not really belong. With a stat struct that we control, we
can consolidate the nanosecond timestamps and the birthtime deep in the VFS
stat calls.
At this moment it is triggered by a request to support the birthtime field for
GPFS. GPFS does not extend the system level struct stat, but instead has a
separate call that gets us the additional information beyond posix. Without
being able to do that within the VFS stat calls, that support would have to be
scattered around the main smbd code.
It will very likely break all the onefs modules, but I think the changes will
be reasonably easy to do.
78 lines
2.3 KiB
C
78 lines
2.3 KiB
C
/*
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* Fake Perms VFS module. Implements passthrough operation of all VFS
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* calls to disk functions, except for file permissions, which are now
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* mode 0700 for the current uid/gid.
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*
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* Copyright (C) Tim Potter, 1999-2000
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* Copyright (C) Alexander Bokovoy, 2002
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* Copyright (C) Andrew Bartlett, 2002
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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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#undef DBGC_CLASS
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#define DBGC_CLASS DBGC_VFS
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static int fake_perms_stat(vfs_handle_struct *handle, const char *fname, SMB_STRUCT_STAT *sbuf)
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{
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int ret = -1;
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ret = SMB_VFS_NEXT_STAT(handle, fname, sbuf);
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if (ret == 0) {
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if (S_ISDIR(sbuf->st_ex_mode)) {
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sbuf->st_ex_mode = S_IFDIR | S_IRWXU;
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} else {
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sbuf->st_ex_mode = S_IRWXU;
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}
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sbuf->st_ex_uid = handle->conn->server_info->utok.uid;
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sbuf->st_ex_gid = handle->conn->server_info->utok.gid;
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}
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return ret;
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}
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static int fake_perms_fstat(vfs_handle_struct *handle, files_struct *fsp, SMB_STRUCT_STAT *sbuf)
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{
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int ret = -1;
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ret = SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
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if (ret == 0) {
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if (S_ISDIR(sbuf->st_ex_mode)) {
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sbuf->st_ex_mode = S_IFDIR | S_IRWXU;
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} else {
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sbuf->st_ex_mode = S_IRWXU;
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}
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sbuf->st_ex_uid = handle->conn->server_info->utok.uid;
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sbuf->st_ex_gid = handle->conn->server_info->utok.gid;
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}
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return ret;
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}
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/* VFS operations structure */
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static vfs_op_tuple fake_perms_ops[] = {
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{SMB_VFS_OP(fake_perms_stat), SMB_VFS_OP_STAT, SMB_VFS_LAYER_TRANSPARENT},
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{SMB_VFS_OP(fake_perms_fstat), SMB_VFS_OP_FSTAT, SMB_VFS_LAYER_TRANSPARENT},
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{SMB_VFS_OP(NULL), SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP}
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};
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NTSTATUS vfs_fake_perms_init(void);
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NTSTATUS vfs_fake_perms_init(void)
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{
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return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "fake_perms", fake_perms_ops);
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}
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