Line data Source code
1 : /*
2 : Unix SMB/CIFS implementation.
3 : VFS API's statvfs abstraction
4 : Copyright (C) Alexander Bokovoy 2005
5 : Copyright (C) Steve French 2005
6 : Copyright (C) James Peach 2006
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 "system/filesys.h"
24 : #include "smbd/smbd.h"
25 :
26 : #if defined(DARWINOS)
27 : #include <sys/attr.h>
28 :
29 : static int darwin_fs_capabilities(const char * path)
30 : {
31 : int caps = 0;
32 : vol_capabilities_attr_t *vcaps;
33 : struct attrlist attrlist;
34 : char attrbuf[sizeof(u_int32_t) + sizeof(vol_capabilities_attr_t)];
35 :
36 : #define FORMAT_CAP(vinfo, cap) \
37 : ( ((vinfo)->valid[VOL_CAPABILITIES_FORMAT] & (cap)) && \
38 : ((vinfo)->capabilities[VOL_CAPABILITIES_FORMAT] & (cap)) )
39 :
40 : #define INTERFACE_CAP(vinfo, cap) \
41 : ( ((vinfo)->valid[VOL_CAPABILITIES_INTERFACES] & (cap)) && \
42 : ((vinfo)->capabilities[VOL_CAPABILITIES_INTERFACES] & (cap)) )
43 :
44 : ZERO_STRUCT(attrlist);
45 : attrlist.bitmapcount = ATTR_BIT_MAP_COUNT;
46 : attrlist.volattr = ATTR_VOL_CAPABILITIES;
47 :
48 : if (getattrlist(path, &attrlist, attrbuf, sizeof(attrbuf), 0) != 0) {
49 : DEBUG(0, ("getattrlist for %s capabilities failed: %s\n",
50 : path, strerror(errno)));
51 : /* Return no capabilities on failure. */
52 : return 0;
53 : }
54 :
55 : vcaps =
56 : (vol_capabilities_attr_t *)(attrbuf + sizeof(u_int32_t));
57 :
58 : if (FORMAT_CAP(vcaps, VOL_CAP_FMT_SPARSE_FILES)) {
59 : caps |= FILE_SUPPORTS_SPARSE_FILES;
60 : }
61 :
62 : if (FORMAT_CAP(vcaps, VOL_CAP_FMT_CASE_SENSITIVE)) {
63 : caps |= FILE_CASE_SENSITIVE_SEARCH;
64 : }
65 :
66 : if (FORMAT_CAP(vcaps, VOL_CAP_FMT_CASE_PRESERVING)) {
67 : caps |= FILE_CASE_PRESERVED_NAMES;
68 : }
69 :
70 : if (INTERFACE_CAP(vcaps, VOL_CAP_INT_EXTENDED_SECURITY)) {
71 : caps |= FILE_PERSISTENT_ACLS;
72 : }
73 :
74 : return caps;
75 : }
76 : #endif /* DARWINOS */
77 :
78 : #if defined(BSD_STYLE_STATVFS)
79 : static int bsd_statvfs(const char *path, struct vfs_statvfs_struct *statbuf)
80 : {
81 : struct statfs sbuf;
82 : int ret;
83 :
84 : ret = statfs(path, &sbuf);
85 : if (ret == 0) {
86 : statbuf->OptimalTransferSize = sbuf.f_iosize;
87 : statbuf->BlockSize = sbuf.f_bsize;
88 : statbuf->TotalBlocks = sbuf.f_blocks;
89 : statbuf->BlocksAvail = sbuf.f_bfree;
90 : statbuf->UserBlocksAvail = sbuf.f_bavail;
91 : statbuf->TotalFileNodes = sbuf.f_files;
92 : statbuf->FreeFileNodes = sbuf.f_ffree;
93 : statbuf->FsIdentifier =
94 : (((uint64_t) sbuf.f_fsid.val[0] << 32) & 0xffffffff00000000LL) |
95 : (uint64_t) sbuf.f_fsid.val[1];
96 : #ifdef DARWINOS
97 : statbuf->FsCapabilities = darwin_fs_capabilities(sbuf.f_mntonname);
98 : #else
99 : /* Try to extrapolate some of the fs flags into the
100 : * capabilities
101 : */
102 : statbuf->FsCapabilities =
103 : FILE_CASE_SENSITIVE_SEARCH | FILE_CASE_PRESERVED_NAMES;
104 : #ifdef MNT_ACLS
105 : if (sbuf.f_flags & MNT_ACLS)
106 : statbuf->FsCapabilities |= FILE_PERSISTENT_ACLS;
107 : #endif
108 : #endif
109 : if (sbuf.f_flags & MNT_QUOTA)
110 : statbuf->FsCapabilities |= FILE_VOLUME_QUOTAS;
111 : if (sbuf.f_flags & MNT_RDONLY)
112 : statbuf->FsCapabilities |= FILE_READ_ONLY_VOLUME;
113 : }
114 :
115 : return ret;
116 : }
117 : #elif defined(STAT_STATVFS) && defined(HAVE_FSID_INT)
118 3897 : static int posix_statvfs(const char *path, struct vfs_statvfs_struct *statbuf)
119 : {
120 : struct statvfs statvfs_buf;
121 : int result;
122 :
123 3897 : result = statvfs(path, &statvfs_buf);
124 :
125 3897 : if (!result) {
126 : /* statvfs bsize is not the statfs bsize, the naming is terrible,
127 : * see bug 11810 */
128 3897 : statbuf->OptimalTransferSize = statvfs_buf.f_bsize;
129 3897 : statbuf->BlockSize = statvfs_buf.f_frsize;
130 3897 : statbuf->TotalBlocks = statvfs_buf.f_blocks;
131 3897 : statbuf->BlocksAvail = statvfs_buf.f_bfree;
132 3897 : statbuf->UserBlocksAvail = statvfs_buf.f_bavail;
133 3897 : statbuf->TotalFileNodes = statvfs_buf.f_files;
134 3897 : statbuf->FreeFileNodes = statvfs_buf.f_ffree;
135 3897 : statbuf->FsIdentifier = statvfs_buf.f_fsid;
136 : /* Try to extrapolate some of the fs flags into the
137 : * capabilities
138 : */
139 3897 : statbuf->FsCapabilities =
140 : FILE_CASE_SENSITIVE_SEARCH | FILE_CASE_PRESERVED_NAMES;
141 : #ifdef ST_QUOTA
142 : if (statvfs_buf.f_flag & ST_QUOTA)
143 : statbuf->FsCapabilities |= FILE_VOLUME_QUOTAS;
144 : #endif
145 3897 : if (statvfs_buf.f_flag & ST_RDONLY)
146 0 : statbuf->FsCapabilities |= FILE_READ_ONLY_VOLUME;
147 :
148 : #if defined(HAVE_FALLOC_FL_PUNCH_HOLE) && defined(HAVE_LSEEK_HOLE_DATA)
149 : /*
150 : * Only flag sparse file support if ZERO_DATA can be used to
151 : * deallocate blocks, and SEEK_HOLE / SEEK_DATA can be used
152 : * to provide QUERY_ALLOCATED_RANGES information.
153 : */
154 3897 : statbuf->FsCapabilities |= FILE_SUPPORTS_SPARSE_FILES;
155 : #endif
156 : }
157 3897 : return result;
158 : }
159 : #endif
160 :
161 : /*
162 : sys_statvfs() is an abstraction layer over system-dependent statvfs()/statfs()
163 : for particular POSIX systems. Due to controversy of what is considered more important
164 : between LSB and FreeBSD/POSIX.1 (IEEE Std 1003.1-2001) we need to abstract the interface
165 : so that particular OS would use its preferred interface.
166 : */
167 3897 : int sys_statvfs(const char *path, struct vfs_statvfs_struct *statbuf)
168 : {
169 : #if defined(BSD_STYLE_STATVFS)
170 : return bsd_statvfs(path, statbuf);
171 : #elif defined(STAT_STATVFS) && defined(HAVE_FSID_INT)
172 3897 : return posix_statvfs(path, statbuf);
173 : #else
174 : /* BB change this to return invalid level */
175 : #ifdef EOPNOTSUPP
176 : return EOPNOTSUPP;
177 : #else
178 : return -1;
179 : #endif /* EOPNOTSUPP */
180 : #endif /* LINUX */
181 :
182 : }
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