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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 "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 */
90umode_t coda_inode_type(struct coda_vattr *attr)
91{
92 switch (attr->va_type) {
93 case C_VREG:
94 return S_IFREG;
95 case C_VDIR:
96 return S_IFDIR;
97 case C_VLNK:
98 return S_IFLNK;
99 case C_VNON:
100 default:
101 return 0;
102 }
103}
104
105void coda_vattr_to_iattr(struct inode *inode, struct coda_vattr *attr)
106{
107 /* inode's i_flags, i_ino are set by iget
108 * XXX: is this all we need ??
109 */
110 umode_t inode_type = coda_inode_type(attr);
111 inode->i_mode |= inode_type;
112
113 if (attr->va_mode != (u_short) -1)
114 inode->i_mode = attr->va_mode | inode_type;
115 if (attr->va_uid != -1)
116 inode->i_uid = make_kuid(&init_user_ns, (uid_t) attr->va_uid);
117 if (attr->va_gid != -1)
118 inode->i_gid = make_kgid(&init_user_ns, (gid_t) attr->va_gid);
119 if (attr->va_nlink != -1)
120 set_nlink(inode, attr->va_nlink);
121 if (attr->va_size != -1)
122 inode->i_size = attr->va_size;
123 if (attr->va_size != -1)
124 inode->i_blocks = (attr->va_size + 511) >> 9;
125 if (attr->va_atime.tv_sec != -1)
126 inode_set_atime_to_ts(inode,
127 coda_to_timespec64(attr->va_atime));
128 if (attr->va_mtime.tv_sec != -1)
129 inode_set_mtime_to_ts(inode,
130 coda_to_timespec64(attr->va_mtime));
131 if (attr->va_ctime.tv_sec != -1)
132 inode_set_ctime_to_ts(inode,
133 coda_to_timespec64(attr->va_ctime));
134}
135
136
137/*
138 * BSD sets attributes that need not be modified to -1.
139 * Linux uses the valid field to indicate what should be
140 * looked at. The BSD type field needs to be deduced from linux
141 * mode.
142 * So we have to do some translations here.
143 */
144
145void coda_iattr_to_vattr(struct iattr *iattr, struct coda_vattr *vattr)
146{
147 unsigned int valid;
148
149 /* clean out */
150 vattr->va_mode = -1;
151 vattr->va_uid = (vuid_t) -1;
152 vattr->va_gid = (vgid_t) -1;
153 vattr->va_size = (off_t) -1;
154 vattr->va_atime.tv_sec = (int64_t) -1;
155 vattr->va_atime.tv_nsec = (long) -1;
156 vattr->va_mtime.tv_sec = (int64_t) -1;
157 vattr->va_mtime.tv_nsec = (long) -1;
158 vattr->va_ctime.tv_sec = (int64_t) -1;
159 vattr->va_ctime.tv_nsec = (long) -1;
160 vattr->va_type = C_VNON;
161 vattr->va_fileid = -1;
162 vattr->va_gen = -1;
163 vattr->va_bytes = -1;
164 vattr->va_nlink = -1;
165 vattr->va_blocksize = -1;
166 vattr->va_rdev = -1;
167 vattr->va_flags = 0;
168
169 /* determine the type */
170#if 0
171 mode = iattr->ia_mode;
172 if ( S_ISDIR(mode) ) {
173 vattr->va_type = C_VDIR;
174 } else if ( S_ISREG(mode) ) {
175 vattr->va_type = C_VREG;
176 } else if ( S_ISLNK(mode) ) {
177 vattr->va_type = C_VLNK;
178 } else {
179 /* don't do others */
180 vattr->va_type = C_VNON;
181 }
182#endif
183
184 /* set those vattrs that need change */
185 valid = iattr->ia_valid;
186 if ( valid & ATTR_MODE ) {
187 vattr->va_mode = iattr->ia_mode;
188 }
189 if ( valid & ATTR_UID ) {
190 vattr->va_uid = (vuid_t) from_kuid(&init_user_ns, iattr->ia_uid);
191 }
192 if ( valid & ATTR_GID ) {
193 vattr->va_gid = (vgid_t) from_kgid(&init_user_ns, iattr->ia_gid);
194 }
195 if ( valid & ATTR_SIZE ) {
196 vattr->va_size = iattr->ia_size;
197 }
198 if ( valid & ATTR_ATIME ) {
199 vattr->va_atime = timespec64_to_coda(iattr->ia_atime);
200 }
201 if ( valid & ATTR_MTIME ) {
202 vattr->va_mtime = timespec64_to_coda(iattr->ia_mtime);
203 }
204 if ( valid & ATTR_CTIME ) {
205 vattr->va_ctime = timespec64_to_coda(iattr->ia_ctime);
206 }
207}
208
1/*
2 * Inode operations for Coda filesystem
3 * Original version: (C) 1996 P. Braam and M. Callahan
4 * Rewritten for Linux 2.1. (C) 1997 Carnegie Mellon University
5 *
6 * Carnegie Mellon encourages users to contribute improvements to
7 * the Coda project. Contact Peter Braam (coda@cs.cmu.edu).
8 */
9
10#include <linux/types.h>
11#include <linux/kernel.h>
12#include <linux/time.h>
13#include <linux/fs.h>
14#include <linux/stat.h>
15#include <linux/errno.h>
16#include <asm/uaccess.h>
17#include <linux/string.h>
18
19#include <linux/coda.h>
20#include <linux/coda_psdev.h>
21#include "coda_linux.h"
22
23/* initialize the debugging variables */
24int coda_fake_statfs;
25
26/* print a fid */
27char * coda_f2s(struct CodaFid *f)
28{
29 static char s[60];
30
31 sprintf(s, "(%08x.%08x.%08x.%08x)", f->opaque[0], f->opaque[1], f->opaque[2], f->opaque[3]);
32
33 return s;
34}
35
36/* recognize special .CONTROL name */
37int coda_iscontrol(const char *name, size_t length)
38{
39 return ((CODA_CONTROLLEN == length) &&
40 (strncmp(name, CODA_CONTROL, CODA_CONTROLLEN) == 0));
41}
42
43/* recognize /coda inode */
44int coda_isroot(struct inode *i)
45{
46 return ( i->i_sb->s_root->d_inode == i );
47}
48
49unsigned short coda_flags_to_cflags(unsigned short flags)
50{
51 unsigned short coda_flags = 0;
52
53 if ((flags & O_ACCMODE) == O_RDONLY)
54 coda_flags |= C_O_READ;
55
56 if ((flags & O_ACCMODE) == O_RDWR)
57 coda_flags |= C_O_READ | C_O_WRITE;
58
59 if ((flags & O_ACCMODE) == O_WRONLY)
60 coda_flags |= C_O_WRITE;
61
62 if (flags & O_TRUNC)
63 coda_flags |= C_O_TRUNC;
64
65 if (flags & O_CREAT)
66 coda_flags |= C_O_CREAT;
67
68 if (flags & O_EXCL)
69 coda_flags |= C_O_EXCL;
70
71 return coda_flags;
72}
73
74
75/* utility functions below */
76void coda_vattr_to_iattr(struct inode *inode, struct coda_vattr *attr)
77{
78 int inode_type;
79 /* inode's i_flags, i_ino are set by iget
80 XXX: is this all we need ??
81 */
82 switch (attr->va_type) {
83 case C_VNON:
84 inode_type = 0;
85 break;
86 case C_VREG:
87 inode_type = S_IFREG;
88 break;
89 case C_VDIR:
90 inode_type = S_IFDIR;
91 break;
92 case C_VLNK:
93 inode_type = S_IFLNK;
94 break;
95 default:
96 inode_type = 0;
97 }
98 inode->i_mode |= inode_type;
99
100 if (attr->va_mode != (u_short) -1)
101 inode->i_mode = attr->va_mode | inode_type;
102 if (attr->va_uid != -1)
103 inode->i_uid = (uid_t) attr->va_uid;
104 if (attr->va_gid != -1)
105 inode->i_gid = (gid_t) attr->va_gid;
106 if (attr->va_nlink != -1)
107 inode->i_nlink = attr->va_nlink;
108 if (attr->va_size != -1)
109 inode->i_size = attr->va_size;
110 if (attr->va_size != -1)
111 inode->i_blocks = (attr->va_size + 511) >> 9;
112 if (attr->va_atime.tv_sec != -1)
113 inode->i_atime = attr->va_atime;
114 if (attr->va_mtime.tv_sec != -1)
115 inode->i_mtime = attr->va_mtime;
116 if (attr->va_ctime.tv_sec != -1)
117 inode->i_ctime = attr->va_ctime;
118}
119
120
121/*
122 * BSD sets attributes that need not be modified to -1.
123 * Linux uses the valid field to indicate what should be
124 * looked at. The BSD type field needs to be deduced from linux
125 * mode.
126 * So we have to do some translations here.
127 */
128
129void coda_iattr_to_vattr(struct iattr *iattr, struct coda_vattr *vattr)
130{
131 unsigned int valid;
132
133 /* clean out */
134 vattr->va_mode = -1;
135 vattr->va_uid = (vuid_t) -1;
136 vattr->va_gid = (vgid_t) -1;
137 vattr->va_size = (off_t) -1;
138 vattr->va_atime.tv_sec = (time_t) -1;
139 vattr->va_atime.tv_nsec = (time_t) -1;
140 vattr->va_mtime.tv_sec = (time_t) -1;
141 vattr->va_mtime.tv_nsec = (time_t) -1;
142 vattr->va_ctime.tv_sec = (time_t) -1;
143 vattr->va_ctime.tv_nsec = (time_t) -1;
144 vattr->va_type = C_VNON;
145 vattr->va_fileid = -1;
146 vattr->va_gen = -1;
147 vattr->va_bytes = -1;
148 vattr->va_nlink = -1;
149 vattr->va_blocksize = -1;
150 vattr->va_rdev = -1;
151 vattr->va_flags = 0;
152
153 /* determine the type */
154#if 0
155 mode = iattr->ia_mode;
156 if ( S_ISDIR(mode) ) {
157 vattr->va_type = C_VDIR;
158 } else if ( S_ISREG(mode) ) {
159 vattr->va_type = C_VREG;
160 } else if ( S_ISLNK(mode) ) {
161 vattr->va_type = C_VLNK;
162 } else {
163 /* don't do others */
164 vattr->va_type = C_VNON;
165 }
166#endif
167
168 /* set those vattrs that need change */
169 valid = iattr->ia_valid;
170 if ( valid & ATTR_MODE ) {
171 vattr->va_mode = iattr->ia_mode;
172 }
173 if ( valid & ATTR_UID ) {
174 vattr->va_uid = (vuid_t) iattr->ia_uid;
175 }
176 if ( valid & ATTR_GID ) {
177 vattr->va_gid = (vgid_t) iattr->ia_gid;
178 }
179 if ( valid & ATTR_SIZE ) {
180 vattr->va_size = iattr->ia_size;
181 }
182 if ( valid & ATTR_ATIME ) {
183 vattr->va_atime = iattr->ia_atime;
184 }
185 if ( valid & ATTR_MTIME ) {
186 vattr->va_mtime = iattr->ia_mtime;
187 }
188 if ( valid & ATTR_CTIME ) {
189 vattr->va_ctime = iattr->ia_ctime;
190 }
191}
192