1 /*
2 Unix SMB/CIFS implementation.
3
4 POSIX NTVFS backend -
5
6 Copyright (C) Andrew Tridgell 2004
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 */
21
22 #include "includes.h"
23 #include "vfs_posix.h"
24
25 /****************************************************************************
26 Change a unix mode to a dos mode.
27 ****************************************************************************/
dos_mode_from_stat(struct pvfs_state * pvfs,struct stat * st)28 static uint32_t dos_mode_from_stat(struct pvfs_state *pvfs, struct stat *st)
29 {
30 int result = 0;
31
32 if ((st->st_mode & S_IWUSR) == 0)
33 result |= FILE_ATTRIBUTE_READONLY;
34
35 if ((pvfs->flags & PVFS_FLAG_MAP_ARCHIVE) && ((st->st_mode & S_IXUSR) != 0))
36 result |= FILE_ATTRIBUTE_ARCHIVE;
37
38 if ((pvfs->flags & PVFS_FLAG_MAP_SYSTEM) && ((st->st_mode & S_IXGRP) != 0))
39 result |= FILE_ATTRIBUTE_SYSTEM;
40
41 if ((pvfs->flags & PVFS_FLAG_MAP_HIDDEN) && ((st->st_mode & S_IXOTH) != 0))
42 result |= FILE_ATTRIBUTE_HIDDEN;
43
44 if (S_ISDIR(st->st_mode))
45 result = FILE_ATTRIBUTE_DIRECTORY | (result & FILE_ATTRIBUTE_READONLY);
46
47 return result;
48 }
49
50
51
52 /*
53 fill in the dos file attributes for a file
54 */
pvfs_fill_dos_info(struct pvfs_state * pvfs,struct pvfs_filename * name,unsigned int flags,int fd)55 NTSTATUS pvfs_fill_dos_info(struct pvfs_state *pvfs, struct pvfs_filename *name,
56 unsigned int flags, int fd)
57 {
58 NTSTATUS status;
59 DATA_BLOB lkey;
60 NTTIME write_time;
61
62 /* make directories appear as size 0 with 1 link */
63 if (S_ISDIR(name->st.st_mode)) {
64 name->st.st_size = 0;
65 name->st.st_nlink = 1;
66 } else if (name->stream_id == 0) {
67 name->stream_name = NULL;
68 }
69
70 /* for now just use the simple samba mapping */
71 unix_to_nt_time(&name->dos.create_time, name->st.st_ctime);
72 unix_to_nt_time(&name->dos.access_time, name->st.st_atime);
73 unix_to_nt_time(&name->dos.write_time, name->st.st_mtime);
74 unix_to_nt_time(&name->dos.change_time, name->st.st_ctime);
75 #ifdef HAVE_STAT_TV_NSEC
76 name->dos.create_time += name->st.st_ctim.tv_nsec / 100;
77 name->dos.access_time += name->st.st_atim.tv_nsec / 100;
78 name->dos.write_time += name->st.st_mtim.tv_nsec / 100;
79 name->dos.change_time += name->st.st_ctim.tv_nsec / 100;
80 #endif
81 name->dos.attrib = dos_mode_from_stat(pvfs, &name->st);
82 name->dos.alloc_size = pvfs_round_alloc_size(pvfs, name->st.st_size);
83 name->dos.nlink = name->st.st_nlink;
84 name->dos.ea_size = 4; /* TODO: Fill this in without hitting the stream bad in pvfs_doseas_load() */
85 if (pvfs->ntvfs->ctx->protocol >= PROTOCOL_SMB2_02) {
86 /* SMB2 represents a null EA with zero bytes */
87 name->dos.ea_size = 0;
88 }
89
90 name->dos.file_id = (((uint64_t)name->st.st_dev)<<32) | name->st.st_ino;
91 name->dos.flags = 0;
92
93 status = pvfs_dosattrib_load(pvfs, name, fd);
94 NT_STATUS_NOT_OK_RETURN(status);
95
96 if (flags & PVFS_RESOLVE_NO_OPENDB) {
97 return NT_STATUS_OK;
98 }
99
100 status = pvfs_locking_key(name, name, &lkey);
101 NT_STATUS_NOT_OK_RETURN(status);
102
103 status = odb_get_file_infos(pvfs->odb_context, &lkey,
104 NULL, &write_time);
105 data_blob_free(&lkey);
106 if (!NT_STATUS_IS_OK(status)) {
107 DEBUG(1,("WARNING: odb_get_file_infos: %s\n", nt_errstr(status)));
108 return status;
109 }
110
111 if (!null_time(write_time)) {
112 name->dos.write_time = write_time;
113 }
114
115 return NT_STATUS_OK;
116 }
117
118
119 /*
120 return a set of unix file permissions for a new file or directory
121 */
pvfs_fileperms(struct pvfs_state * pvfs,uint32_t attrib)122 mode_t pvfs_fileperms(struct pvfs_state *pvfs, uint32_t attrib)
123 {
124 mode_t mode = (S_IRUSR | S_IRGRP | S_IROTH | S_IWUSR | S_IWGRP | S_IWOTH);
125
126 if (!(pvfs->flags & PVFS_FLAG_XATTR_ENABLE) &&
127 (attrib & FILE_ATTRIBUTE_READONLY)) {
128 mode &= ~(S_IWUSR | S_IWGRP | S_IWOTH);
129 }
130
131 if (!(pvfs->flags & PVFS_FLAG_XATTR_ENABLE)) {
132 if ((attrib & FILE_ATTRIBUTE_ARCHIVE) &&
133 (pvfs->flags & PVFS_FLAG_MAP_ARCHIVE)) {
134 mode |= S_IXUSR;
135 }
136 if ((attrib & FILE_ATTRIBUTE_SYSTEM) &&
137 (pvfs->flags & PVFS_FLAG_MAP_SYSTEM)) {
138 mode |= S_IXGRP;
139 }
140 if ((attrib & FILE_ATTRIBUTE_HIDDEN) &&
141 (pvfs->flags & PVFS_FLAG_MAP_HIDDEN)) {
142 mode |= S_IXOTH;
143 }
144 }
145
146 if (attrib & FILE_ATTRIBUTE_DIRECTORY) {
147 mode |= (S_IFDIR | S_IWUSR);
148 mode |= (S_IXUSR | S_IXGRP | S_IXOTH);
149 mode &= pvfs->options.dir_mask;
150 mode |= pvfs->options.force_dir_mode;
151 } else {
152 mode &= pvfs->options.create_mask;
153 mode |= pvfs->options.force_create_mode;
154 }
155
156 return mode;
157 }
158
159
160