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
24#if defined(LINUX) && defined(HAVE_FSID_INT)
25static int linux_statvfs(const char *path, vfs_statvfs_struct *statbuf)
26{
27	struct statvfs statvfs_buf;
28	int result;
29
30	result = statvfs(path, &statvfs_buf);
31
32	if (!result) {
33		statbuf->OptimalTransferSize = statvfs_buf.f_frsize;
34		statbuf->BlockSize = statvfs_buf.f_bsize;
35		statbuf->TotalBlocks = statvfs_buf.f_blocks;
36		statbuf->BlocksAvail = statvfs_buf.f_bfree;
37		statbuf->UserBlocksAvail = statvfs_buf.f_bavail;
38		statbuf->TotalFileNodes = statvfs_buf.f_files;
39		statbuf->FreeFileNodes = statvfs_buf.f_ffree;
40		statbuf->FsIdentifier = statvfs_buf.f_fsid;
41
42		/* Good defaults for Linux filesystems are case sensitive
43		 * and case preserving.
44		 */
45		statbuf->FsCapabilities =
46		    FILE_CASE_SENSITIVE_SEARCH | FILE_CASE_PRESERVED_NAMES;
47	}
48	return result;
49}
50#endif
51
52#if defined(DARWINOS)
53
54#include <sys/attr.h>
55
56static int darwin_fs_capabilities(const char * path)
57{
58	int caps = 0;
59	vol_capabilities_attr_t *vcaps;
60	struct attrlist	attrlist;
61	char attrbuf[sizeof(u_int32_t) + sizeof(vol_capabilities_attr_t)];
62
63#define FORMAT_CAP(vinfo, cap) \
64	( ((vinfo)->valid[VOL_CAPABILITIES_FORMAT] & (cap)) && \
65	   ((vinfo)->capabilities[VOL_CAPABILITIES_FORMAT] & (cap)) )
66
67#define INTERFACE_CAP(vinfo, cap) \
68	( ((vinfo)->valid[VOL_CAPABILITIES_INTERFACES] & (cap)) && \
69	   ((vinfo)->capabilities[VOL_CAPABILITIES_INTERFACES] & (cap)) )
70
71	ZERO_STRUCT(attrlist);
72	attrlist.bitmapcount = ATTR_BIT_MAP_COUNT;
73	attrlist.volattr = ATTR_VOL_CAPABILITIES;
74
75	if (getattrlist(path, &attrlist, attrbuf, sizeof(attrbuf), 0) != 0) {
76		DEBUG(0, ("getattrlist for %s capabilities failed: %s\n",
77			    path, strerror(errno)));
78		/* Return no capabilities on failure. */
79		return 0;
80	}
81
82	vcaps =
83	    (vol_capabilities_attr_t *)(attrbuf + sizeof(u_int32_t));
84
85	if (FORMAT_CAP(vcaps, VOL_CAP_FMT_SPARSE_FILES)) {
86		caps |= FILE_SUPPORTS_SPARSE_FILES;
87	}
88
89	if (FORMAT_CAP(vcaps, VOL_CAP_FMT_CASE_SENSITIVE)) {
90		caps |= FILE_CASE_SENSITIVE_SEARCH;
91	}
92
93	if (FORMAT_CAP(vcaps, VOL_CAP_FMT_CASE_PRESERVING)) {
94		caps |= FILE_CASE_PRESERVED_NAMES;
95	}
96
97	if (INTERFACE_CAP(vcaps, VOL_CAP_INT_EXTENDED_SECURITY)) {
98		caps |= FILE_PERSISTENT_ACLS;
99	}
100
101	return caps;
102}
103
104static int darwin_statvfs(const char *path, vfs_statvfs_struct *statbuf)
105{
106	struct statfs sbuf;
107	int ret;
108
109	ret = statfs(path, &sbuf);
110	if (ret != 0) {
111		return ret;
112	}
113
114	statbuf->OptimalTransferSize = sbuf.f_iosize;
115	statbuf->BlockSize = sbuf.f_bsize;
116	statbuf->TotalBlocks = sbuf.f_blocks;
117	statbuf->BlocksAvail = sbuf.f_bfree;
118	statbuf->UserBlocksAvail = sbuf.f_bavail;
119	statbuf->TotalFileNodes = sbuf.f_files;
120	statbuf->FreeFileNodes = sbuf.f_ffree;
121	statbuf->FsIdentifier = *(uint64_t *)(&sbuf.f_fsid); /* Ick. */
122	statbuf->FsCapabilities = darwin_fs_capabilities(sbuf.f_mntonname);
123
124	return 0;
125}
126#endif
127
128/*
129 sys_statvfs() is an abstraction layer over system-dependent statvfs()/statfs()
130 for particular POSIX systems. Due to controversy of what is considered more important
131 between LSB and FreeBSD/POSIX.1 (IEEE Std 1003.1-2001) we need to abstract the interface
132 so that particular OS would use its preffered interface.
133*/
134int sys_statvfs(const char *path, vfs_statvfs_struct *statbuf)
135{
136#if defined(LINUX) && defined(HAVE_FSID_INT)
137	return linux_statvfs(path, statbuf);
138#elif defined(DARWINOS)
139	return darwin_statvfs(path, statbuf);
140#else
141	/* BB change this to return invalid level */
142#ifdef EOPNOTSUPP
143	return EOPNOTSUPP;
144#else
145	return -1;
146#endif /* EOPNOTSUPP */
147#endif /* LINUX */
148
149}
150