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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Inode operations for Coda filesystem
4 * Original version: (C) 1996 P. Braam and M. Callahan
5 * Rewritten for Linux 2.1. (C) 1997 Carnegie Mellon University
6 *
7 * Carnegie Mellon encourages users to contribute improvements to
8 * the Coda project. Contact Peter Braam (coda@cs.cmu.edu).
9 */
10
11#include <linux/types.h>
12#include <linux/kernel.h>
13#include <linux/time.h>
14#include <linux/fs.h>
15#include <linux/stat.h>
16#include <linux/errno.h>
17#include <linux/uaccess.h>
18#include <linux/string.h>
19
20#include <linux/coda.h>
21#include <linux/coda_psdev.h>
22#include "coda_linux.h"
23
24/* initialize the debugging variables */
25int coda_fake_statfs;
26
27/* print a fid */
28char * coda_f2s(struct CodaFid *f)
29{
30 static char s[60];
31
32 sprintf(s, "(%08x.%08x.%08x.%08x)", f->opaque[0], f->opaque[1], f->opaque[2], f->opaque[3]);
33
34 return s;
35}
36
37/* recognize special .CONTROL name */
38int coda_iscontrol(const char *name, size_t length)
39{
40 return ((CODA_CONTROLLEN == length) &&
41 (strncmp(name, CODA_CONTROL, CODA_CONTROLLEN) == 0));
42}
43
44unsigned short coda_flags_to_cflags(unsigned short flags)
45{
46 unsigned short coda_flags = 0;
47
48 if ((flags & O_ACCMODE) == O_RDONLY)
49 coda_flags |= C_O_READ;
50
51 if ((flags & O_ACCMODE) == O_RDWR)
52 coda_flags |= C_O_READ | C_O_WRITE;
53
54 if ((flags & O_ACCMODE) == O_WRONLY)
55 coda_flags |= C_O_WRITE;
56
57 if (flags & O_TRUNC)
58 coda_flags |= C_O_TRUNC;
59
60 if (flags & O_CREAT)
61 coda_flags |= C_O_CREAT;
62
63 if (flags & O_EXCL)
64 coda_flags |= C_O_EXCL;
65
66 return coda_flags;
67}
68
69
70/* utility functions below */
71void coda_vattr_to_iattr(struct inode *inode, struct coda_vattr *attr)
72{
73 int inode_type;
74 /* inode's i_flags, i_ino are set by iget
75 XXX: is this all we need ??
76 */
77 switch (attr->va_type) {
78 case C_VNON:
79 inode_type = 0;
80 break;
81 case C_VREG:
82 inode_type = S_IFREG;
83 break;
84 case C_VDIR:
85 inode_type = S_IFDIR;
86 break;
87 case C_VLNK:
88 inode_type = S_IFLNK;
89 break;
90 default:
91 inode_type = 0;
92 }
93 inode->i_mode |= inode_type;
94
95 if (attr->va_mode != (u_short) -1)
96 inode->i_mode = attr->va_mode | inode_type;
97 if (attr->va_uid != -1)
98 inode->i_uid = make_kuid(&init_user_ns, (uid_t) attr->va_uid);
99 if (attr->va_gid != -1)
100 inode->i_gid = make_kgid(&init_user_ns, (gid_t) attr->va_gid);
101 if (attr->va_nlink != -1)
102 set_nlink(inode, attr->va_nlink);
103 if (attr->va_size != -1)
104 inode->i_size = attr->va_size;
105 if (attr->va_size != -1)
106 inode->i_blocks = (attr->va_size + 511) >> 9;
107 if (attr->va_atime.tv_sec != -1)
108 inode->i_atime = attr->va_atime;
109 if (attr->va_mtime.tv_sec != -1)
110 inode->i_mtime = attr->va_mtime;
111 if (attr->va_ctime.tv_sec != -1)
112 inode->i_ctime = attr->va_ctime;
113}
114
115
116/*
117 * BSD sets attributes that need not be modified to -1.
118 * Linux uses the valid field to indicate what should be
119 * looked at. The BSD type field needs to be deduced from linux
120 * mode.
121 * So we have to do some translations here.
122 */
123
124void coda_iattr_to_vattr(struct iattr *iattr, struct coda_vattr *vattr)
125{
126 unsigned int valid;
127
128 /* clean out */
129 vattr->va_mode = -1;
130 vattr->va_uid = (vuid_t) -1;
131 vattr->va_gid = (vgid_t) -1;
132 vattr->va_size = (off_t) -1;
133 vattr->va_atime.tv_sec = (time_t) -1;
134 vattr->va_atime.tv_nsec = (time_t) -1;
135 vattr->va_mtime.tv_sec = (time_t) -1;
136 vattr->va_mtime.tv_nsec = (time_t) -1;
137 vattr->va_ctime.tv_sec = (time_t) -1;
138 vattr->va_ctime.tv_nsec = (time_t) -1;
139 vattr->va_type = C_VNON;
140 vattr->va_fileid = -1;
141 vattr->va_gen = -1;
142 vattr->va_bytes = -1;
143 vattr->va_nlink = -1;
144 vattr->va_blocksize = -1;
145 vattr->va_rdev = -1;
146 vattr->va_flags = 0;
147
148 /* determine the type */
149#if 0
150 mode = iattr->ia_mode;
151 if ( S_ISDIR(mode) ) {
152 vattr->va_type = C_VDIR;
153 } else if ( S_ISREG(mode) ) {
154 vattr->va_type = C_VREG;
155 } else if ( S_ISLNK(mode) ) {
156 vattr->va_type = C_VLNK;
157 } else {
158 /* don't do others */
159 vattr->va_type = C_VNON;
160 }
161#endif
162
163 /* set those vattrs that need change */
164 valid = iattr->ia_valid;
165 if ( valid & ATTR_MODE ) {
166 vattr->va_mode = iattr->ia_mode;
167 }
168 if ( valid & ATTR_UID ) {
169 vattr->va_uid = (vuid_t) from_kuid(&init_user_ns, iattr->ia_uid);
170 }
171 if ( valid & ATTR_GID ) {
172 vattr->va_gid = (vgid_t) from_kgid(&init_user_ns, iattr->ia_gid);
173 }
174 if ( valid & ATTR_SIZE ) {
175 vattr->va_size = iattr->ia_size;
176 }
177 if ( valid & ATTR_ATIME ) {
178 vattr->va_atime = iattr->ia_atime;
179 }
180 if ( valid & ATTR_MTIME ) {
181 vattr->va_mtime = iattr->ia_mtime;
182 }
183 if ( valid & ATTR_CTIME ) {
184 vattr->va_ctime = iattr->ia_ctime;
185 }
186}
187
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Inode operations for Coda filesystem
4 * Original version: (C) 1996 P. Braam and M. Callahan
5 * Rewritten for Linux 2.1. (C) 1997 Carnegie Mellon University
6 *
7 * Carnegie Mellon encourages users to contribute improvements to
8 * the Coda project. Contact Peter Braam (coda@cs.cmu.edu).
9 */
10
11#include <linux/types.h>
12#include <linux/kernel.h>
13#include <linux/time.h>
14#include <linux/fs.h>
15#include <linux/stat.h>
16#include <linux/errno.h>
17#include <linux/uaccess.h>
18#include <linux/string.h>
19
20#include <linux/coda.h>
21#include "coda_psdev.h"
22#include "coda_linux.h"
23
24/* initialize the debugging variables */
25int coda_fake_statfs;
26
27/* print a fid */
28char * coda_f2s(struct CodaFid *f)
29{
30 static char s[60];
31
32 sprintf(s, "(%08x.%08x.%08x.%08x)", f->opaque[0], f->opaque[1], f->opaque[2], f->opaque[3]);
33
34 return s;
35}
36
37/* recognize special .CONTROL name */
38int coda_iscontrol(const char *name, size_t length)
39{
40 return ((CODA_CONTROLLEN == length) &&
41 (strncmp(name, CODA_CONTROL, CODA_CONTROLLEN) == 0));
42}
43
44unsigned short coda_flags_to_cflags(unsigned short flags)
45{
46 unsigned short coda_flags = 0;
47
48 if ((flags & O_ACCMODE) == O_RDONLY)
49 coda_flags |= C_O_READ;
50
51 if ((flags & O_ACCMODE) == O_RDWR)
52 coda_flags |= C_O_READ | C_O_WRITE;
53
54 if ((flags & O_ACCMODE) == O_WRONLY)
55 coda_flags |= C_O_WRITE;
56
57 if (flags & O_TRUNC)
58 coda_flags |= C_O_TRUNC;
59
60 if (flags & O_CREAT)
61 coda_flags |= C_O_CREAT;
62
63 if (flags & O_EXCL)
64 coda_flags |= C_O_EXCL;
65
66 return coda_flags;
67}
68
69static struct timespec64 coda_to_timespec64(struct coda_timespec ts)
70{
71 struct timespec64 ts64 = {
72 .tv_sec = ts.tv_sec,
73 .tv_nsec = ts.tv_nsec,
74 };
75
76 return ts64;
77}
78
79static struct coda_timespec timespec64_to_coda(struct timespec64 ts64)
80{
81 struct coda_timespec ts = {
82 .tv_sec = ts64.tv_sec,
83 .tv_nsec = ts64.tv_nsec,
84 };
85
86 return ts;
87}
88
89/* utility functions below */
90void coda_vattr_to_iattr(struct inode *inode, struct coda_vattr *attr)
91{
92 int inode_type;
93 /* inode's i_flags, i_ino are set by iget
94 XXX: is this all we need ??
95 */
96 switch (attr->va_type) {
97 case C_VNON:
98 inode_type = 0;
99 break;
100 case C_VREG:
101 inode_type = S_IFREG;
102 break;
103 case C_VDIR:
104 inode_type = S_IFDIR;
105 break;
106 case C_VLNK:
107 inode_type = S_IFLNK;
108 break;
109 default:
110 inode_type = 0;
111 }
112 inode->i_mode |= inode_type;
113
114 if (attr->va_mode != (u_short) -1)
115 inode->i_mode = attr->va_mode | inode_type;
116 if (attr->va_uid != -1)
117 inode->i_uid = make_kuid(&init_user_ns, (uid_t) attr->va_uid);
118 if (attr->va_gid != -1)
119 inode->i_gid = make_kgid(&init_user_ns, (gid_t) attr->va_gid);
120 if (attr->va_nlink != -1)
121 set_nlink(inode, attr->va_nlink);
122 if (attr->va_size != -1)
123 inode->i_size = attr->va_size;
124 if (attr->va_size != -1)
125 inode->i_blocks = (attr->va_size + 511) >> 9;
126 if (attr->va_atime.tv_sec != -1)
127 inode->i_atime = coda_to_timespec64(attr->va_atime);
128 if (attr->va_mtime.tv_sec != -1)
129 inode->i_mtime = coda_to_timespec64(attr->va_mtime);
130 if (attr->va_ctime.tv_sec != -1)
131 inode->i_ctime = coda_to_timespec64(attr->va_ctime);
132}
133
134
135/*
136 * BSD sets attributes that need not be modified to -1.
137 * Linux uses the valid field to indicate what should be
138 * looked at. The BSD type field needs to be deduced from linux
139 * mode.
140 * So we have to do some translations here.
141 */
142
143void coda_iattr_to_vattr(struct iattr *iattr, struct coda_vattr *vattr)
144{
145 unsigned int valid;
146
147 /* clean out */
148 vattr->va_mode = -1;
149 vattr->va_uid = (vuid_t) -1;
150 vattr->va_gid = (vgid_t) -1;
151 vattr->va_size = (off_t) -1;
152 vattr->va_atime.tv_sec = (int64_t) -1;
153 vattr->va_atime.tv_nsec = (long) -1;
154 vattr->va_mtime.tv_sec = (int64_t) -1;
155 vattr->va_mtime.tv_nsec = (long) -1;
156 vattr->va_ctime.tv_sec = (int64_t) -1;
157 vattr->va_ctime.tv_nsec = (long) -1;
158 vattr->va_type = C_VNON;
159 vattr->va_fileid = -1;
160 vattr->va_gen = -1;
161 vattr->va_bytes = -1;
162 vattr->va_nlink = -1;
163 vattr->va_blocksize = -1;
164 vattr->va_rdev = -1;
165 vattr->va_flags = 0;
166
167 /* determine the type */
168#if 0
169 mode = iattr->ia_mode;
170 if ( S_ISDIR(mode) ) {
171 vattr->va_type = C_VDIR;
172 } else if ( S_ISREG(mode) ) {
173 vattr->va_type = C_VREG;
174 } else if ( S_ISLNK(mode) ) {
175 vattr->va_type = C_VLNK;
176 } else {
177 /* don't do others */
178 vattr->va_type = C_VNON;
179 }
180#endif
181
182 /* set those vattrs that need change */
183 valid = iattr->ia_valid;
184 if ( valid & ATTR_MODE ) {
185 vattr->va_mode = iattr->ia_mode;
186 }
187 if ( valid & ATTR_UID ) {
188 vattr->va_uid = (vuid_t) from_kuid(&init_user_ns, iattr->ia_uid);
189 }
190 if ( valid & ATTR_GID ) {
191 vattr->va_gid = (vgid_t) from_kgid(&init_user_ns, iattr->ia_gid);
192 }
193 if ( valid & ATTR_SIZE ) {
194 vattr->va_size = iattr->ia_size;
195 }
196 if ( valid & ATTR_ATIME ) {
197 vattr->va_atime = timespec64_to_coda(iattr->ia_atime);
198 }
199 if ( valid & ATTR_MTIME ) {
200 vattr->va_mtime = timespec64_to_coda(iattr->ia_mtime);
201 }
202 if ( valid & ATTR_CTIME ) {
203 vattr->va_ctime = timespec64_to_coda(iattr->ia_ctime);
204 }
205}
206