2 * Fake Disk-Free and Quota VFS module. Implements passthrough operation
3 * of all VFS calls, except for "disk free" and "get quota" which
4 * are handled by reading a text file named ".dfq" in the current directory.
6 * This module is intended for testing purposes.
8 * Copyright (C) Uri Simchoni, 2016
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 3 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, see <http://www.gnu.org/licenses/>.
25 #include "smbd/smbd.h"
28 #define DBGC_CLASS DBGC_VFS
30 static int dfq_get_quota(struct vfs_handle_struct *handle,
31 const struct smb_filename *smb_fname,
32 enum SMB_QUOTA_TYPE qtype,
36 static uint64_t dfq_load_param(int snum, const char *path, const char *section,
37 const char *param, uint64_t def_val)
42 talloc_asprintf(talloc_tos(), "%s/%s/%s", section, param, path);
47 ret = (uint64_t)lp_parm_ulonglong(snum, "fake_dfq", option,
48 (unsigned long long)def_val);
55 static uint64_t dfq_disk_free(vfs_handle_struct *handle,
56 const struct smb_filename *smb_fname,
62 int snum = SNUM(handle->conn);
63 uint64_t dfq_bsize = 0;
64 struct smb_filename *rpath_fname = NULL;
66 /* look up the params based on real path to be resilient
67 * to refactoring of path<->realpath
69 rpath_fname = SMB_VFS_NEXT_REALPATH(handle, talloc_tos(), smb_fname);
70 if (rpath_fname != NULL) {
71 dfq_bsize = dfq_load_param(snum, rpath_fname->base_name,
72 "df", "block size", 0);
75 TALLOC_FREE(rpath_fname);
76 return SMB_VFS_NEXT_DISK_FREE(handle, smb_fname, bsize, dfree,
81 *dfree = dfq_load_param(snum, rpath_fname->base_name,
82 "df", "disk free", 0);
83 *dsize = dfq_load_param(snum, rpath_fname->base_name,
84 "df", "disk size", 0);
86 if ((*bsize) < 1024) {
87 free_1k = (*dfree) / (1024 / (*bsize));
89 free_1k = ((*bsize) / 1024) * (*dfree);
92 TALLOC_FREE(rpath_fname);
96 static int dfq_get_quota(struct vfs_handle_struct *handle,
97 const struct smb_filename *smb_fname,
98 enum SMB_QUOTA_TYPE qtype,
104 char *section = NULL;
105 int snum = SNUM(handle->conn);
107 struct smb_filename *rpath_fname = NULL;
109 rpath_fname = SMB_VFS_NEXT_REALPATH(handle, talloc_tos(), smb_fname);
110 if (rpath_fname == NULL) {
115 case SMB_USER_QUOTA_TYPE:
116 section = talloc_asprintf(talloc_tos(), "u%llu",
117 (unsigned long long)id.uid);
119 case SMB_GROUP_QUOTA_TYPE:
120 section = talloc_asprintf(talloc_tos(), "g%llu",
121 (unsigned long long)id.gid);
123 case SMB_USER_FS_QUOTA_TYPE:
124 section = talloc_strdup(talloc_tos(), "udflt");
126 case SMB_GROUP_FS_QUOTA_TYPE:
127 section = talloc_strdup(talloc_tos(), "gdflt");
133 if (section == NULL) {
137 bsize = dfq_load_param(snum, rpath_fname->base_name,
138 section, "block size", 4096);
143 if (dfq_load_param(snum, rpath_fname->base_name,
144 section, "err", 0) != 0) {
150 if (dfq_load_param(snum, rpath_fname->base_name,
151 section, "nosys", 0) != 0) {
160 qt->hardlimit = dfq_load_param(snum, rpath_fname->base_name,
161 section, "hard limit", 0);
162 qt->softlimit = dfq_load_param(snum, rpath_fname->base_name,
163 section, "soft limit", 0);
164 qt->curblocks = dfq_load_param(snum, rpath_fname->base_name,
165 section, "cur blocks", 0);
167 dfq_load_param(snum, rpath_fname->base_name,
168 section, "inode hard limit", 0);
170 dfq_load_param(snum, rpath_fname->base_name,
171 section, "inode soft limit", 0);
172 qt->curinodes = dfq_load_param(snum, rpath_fname->base_name,
173 section, "cur inodes", 0);
174 qt->qflags = dfq_load_param(snum, rpath_fname->base_name,
175 section, "qflags", QUOTAS_DENY_DISK);
180 rc = SMB_VFS_NEXT_GET_QUOTA(handle, smb_fname, qtype, id, qt);
184 TALLOC_FREE(section);
185 TALLOC_FREE(rpath_fname);
190 static void dfq_fake_stat(struct vfs_handle_struct *handle,
191 struct smb_filename *smb_fname,
192 SMB_STRUCT_STAT *sbuf)
194 int snum = SNUM(handle->conn);
195 char *full_path = NULL;
196 char *to_free = NULL;
197 char path[PATH_MAX + 1];
201 len = full_path_tos(handle->conn->cwd_fsp->fsp_name->base_name,
202 smb_fname->base_name,
204 &full_path, &to_free);
206 DBG_ERR("Could not allocate memory in full_path_tos.\n");
210 gid = dfq_load_param(snum, full_path, "stat", "sgid", 0);
212 sbuf->st_ex_gid = gid;
213 sbuf->st_ex_mode |= S_ISGID;
216 TALLOC_FREE(to_free);
219 static int dfq_stat(vfs_handle_struct *handle,
220 struct smb_filename *smb_fname)
224 ret = SMB_VFS_NEXT_STAT(handle, smb_fname);
229 dfq_fake_stat(handle, smb_fname, &smb_fname->st);
234 static int dfq_fstat(vfs_handle_struct *handle,
236 SMB_STRUCT_STAT *sbuf)
240 ret = SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
245 dfq_fake_stat(handle, fsp->fsp_name, sbuf);
250 static int dfq_lstat(vfs_handle_struct *handle,
251 struct smb_filename *smb_fname)
255 ret = SMB_VFS_NEXT_LSTAT(handle, smb_fname);
260 dfq_fake_stat(handle, smb_fname, &smb_fname->st);
265 struct vfs_fn_pointers vfs_fake_dfq_fns = {
266 /* Disk operations */
268 .disk_free_fn = dfq_disk_free,
269 .get_quota_fn = dfq_get_quota,
272 .fstat_fn = dfq_fstat,
273 .lstat_fn = dfq_lstat,
277 NTSTATUS vfs_fake_dfq_init(TALLOC_CTX *ctx)
279 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "fake_dfq",