1 // SPDX-License-Identifier: GPL-2.0 1 // SPDX-License-Identifier: GPL-2.0
2 /* 2 /*
3 * Inode operations for Coda filesystem 3 * Inode operations for Coda filesystem
4 * Original version: (C) 1996 P. Braam and M. 4 * Original version: (C) 1996 P. Braam and M. Callahan
5 * Rewritten for Linux 2.1. (C) 1997 Carnegie 5 * Rewritten for Linux 2.1. (C) 1997 Carnegie Mellon University
6 * 6 *
7 * Carnegie Mellon encourages users to contrib 7 * Carnegie Mellon encourages users to contribute improvements to
8 * the Coda project. Contact Peter Braam (coda 8 * the Coda project. Contact Peter Braam (coda@cs.cmu.edu).
9 */ 9 */
10 10
11 #include <linux/types.h> 11 #include <linux/types.h>
12 #include <linux/kernel.h> 12 #include <linux/kernel.h>
13 #include <linux/time.h> 13 #include <linux/time.h>
14 #include <linux/fs.h> 14 #include <linux/fs.h>
15 #include <linux/stat.h> 15 #include <linux/stat.h>
16 #include <linux/errno.h> 16 #include <linux/errno.h>
17 #include <linux/uaccess.h> 17 #include <linux/uaccess.h>
18 #include <linux/string.h> 18 #include <linux/string.h>
19 19
20 #include <linux/coda.h> 20 #include <linux/coda.h>
21 #include "coda_psdev.h" 21 #include "coda_psdev.h"
22 #include "coda_linux.h" 22 #include "coda_linux.h"
23 23
24 /* initialize the debugging variables */ 24 /* initialize the debugging variables */
25 int coda_fake_statfs; 25 int coda_fake_statfs;
26 26
27 /* print a fid */ 27 /* print a fid */
28 char * coda_f2s(struct CodaFid *f) 28 char * coda_f2s(struct CodaFid *f)
29 { 29 {
30 static char s[60]; 30 static char s[60];
31 31
32 sprintf(s, "(%08x.%08x.%08x.%08x)", f- 32 sprintf(s, "(%08x.%08x.%08x.%08x)", f->opaque[0], f->opaque[1], f->opaque[2], f->opaque[3]);
33 33
34 return s; 34 return s;
35 } 35 }
36 36
37 /* recognize special .CONTROL name */ 37 /* recognize special .CONTROL name */
38 int coda_iscontrol(const char *name, size_t le 38 int coda_iscontrol(const char *name, size_t length)
39 { 39 {
40 return ((CODA_CONTROLLEN == length) && 40 return ((CODA_CONTROLLEN == length) &&
41 (strncmp(name, CODA_CONTROL, C 41 (strncmp(name, CODA_CONTROL, CODA_CONTROLLEN) == 0));
42 } 42 }
43 43
44 unsigned short coda_flags_to_cflags(unsigned s 44 unsigned short coda_flags_to_cflags(unsigned short flags)
45 { 45 {
46 unsigned short coda_flags = 0; 46 unsigned short coda_flags = 0;
47 47
48 if ((flags & O_ACCMODE) == O_RDONLY) 48 if ((flags & O_ACCMODE) == O_RDONLY)
49 coda_flags |= C_O_READ; 49 coda_flags |= C_O_READ;
50 50
51 if ((flags & O_ACCMODE) == O_RDWR) 51 if ((flags & O_ACCMODE) == O_RDWR)
52 coda_flags |= C_O_READ | C_O_W 52 coda_flags |= C_O_READ | C_O_WRITE;
53 53
54 if ((flags & O_ACCMODE) == O_WRONLY) 54 if ((flags & O_ACCMODE) == O_WRONLY)
55 coda_flags |= C_O_WRITE; 55 coda_flags |= C_O_WRITE;
56 56
57 if (flags & O_TRUNC) 57 if (flags & O_TRUNC)
58 coda_flags |= C_O_TRUNC; 58 coda_flags |= C_O_TRUNC;
59 59
60 if (flags & O_CREAT) 60 if (flags & O_CREAT)
61 coda_flags |= C_O_CREAT; 61 coda_flags |= C_O_CREAT;
62 62
63 if (flags & O_EXCL) 63 if (flags & O_EXCL)
64 coda_flags |= C_O_EXCL; 64 coda_flags |= C_O_EXCL;
65 65
66 return coda_flags; 66 return coda_flags;
67 } 67 }
68 68
69 static struct timespec64 coda_to_timespec64(st 69 static struct timespec64 coda_to_timespec64(struct coda_timespec ts)
70 { 70 {
71 struct timespec64 ts64 = { 71 struct timespec64 ts64 = {
72 .tv_sec = ts.tv_sec, 72 .tv_sec = ts.tv_sec,
73 .tv_nsec = ts.tv_nsec, 73 .tv_nsec = ts.tv_nsec,
74 }; 74 };
75 75
76 return ts64; 76 return ts64;
77 } 77 }
78 78
79 static struct coda_timespec timespec64_to_coda 79 static struct coda_timespec timespec64_to_coda(struct timespec64 ts64)
80 { 80 {
81 struct coda_timespec ts = { 81 struct coda_timespec ts = {
82 .tv_sec = ts64.tv_sec, 82 .tv_sec = ts64.tv_sec,
83 .tv_nsec = ts64.tv_nsec, 83 .tv_nsec = ts64.tv_nsec,
84 }; 84 };
85 85
86 return ts; 86 return ts;
87 } 87 }
88 88
89 /* utility functions below */ 89 /* utility functions below */
90 umode_t coda_inode_type(struct coda_vattr *att 90 umode_t coda_inode_type(struct coda_vattr *attr)
91 { 91 {
92 switch (attr->va_type) { 92 switch (attr->va_type) {
93 case C_VREG: 93 case C_VREG:
94 return S_IFREG; 94 return S_IFREG;
95 case C_VDIR: 95 case C_VDIR:
96 return S_IFDIR; 96 return S_IFDIR;
97 case C_VLNK: 97 case C_VLNK:
98 return S_IFLNK; 98 return S_IFLNK;
99 case C_VNON: 99 case C_VNON:
100 default: 100 default:
101 return 0; 101 return 0;
102 } 102 }
103 } 103 }
104 104
105 void coda_vattr_to_iattr(struct inode *inode, 105 void coda_vattr_to_iattr(struct inode *inode, struct coda_vattr *attr)
106 { 106 {
107 /* inode's i_flags, i_ino are set by i 107 /* inode's i_flags, i_ino are set by iget
108 * XXX: is this all we need ?? 108 * XXX: is this all we need ??
109 */ 109 */
110 umode_t inode_type = coda_inode_type(a 110 umode_t inode_type = coda_inode_type(attr);
111 inode->i_mode |= inode_type; 111 inode->i_mode |= inode_type;
112 112
113 if (attr->va_mode != (u_short) -1) 113 if (attr->va_mode != (u_short) -1)
114 inode->i_mode = attr->va_mode 114 inode->i_mode = attr->va_mode | inode_type;
115 if (attr->va_uid != -1) 115 if (attr->va_uid != -1)
116 inode->i_uid = make_kuid(&init 116 inode->i_uid = make_kuid(&init_user_ns, (uid_t) attr->va_uid);
117 if (attr->va_gid != -1) 117 if (attr->va_gid != -1)
118 inode->i_gid = make_kgid(&init 118 inode->i_gid = make_kgid(&init_user_ns, (gid_t) attr->va_gid);
119 if (attr->va_nlink != -1) 119 if (attr->va_nlink != -1)
120 set_nlink(inode, attr->va_nlin 120 set_nlink(inode, attr->va_nlink);
121 if (attr->va_size != -1) 121 if (attr->va_size != -1)
122 inode->i_size = attr->va_size; 122 inode->i_size = attr->va_size;
123 if (attr->va_size != -1) 123 if (attr->va_size != -1)
124 inode->i_blocks = (attr->va_si 124 inode->i_blocks = (attr->va_size + 511) >> 9;
125 if (attr->va_atime.tv_sec != -1) 125 if (attr->va_atime.tv_sec != -1)
126 inode_set_atime_to_ts(inode, !! 126 inode->i_atime = coda_to_timespec64(attr->va_atime);
127 coda_to_ <<
128 if (attr->va_mtime.tv_sec != -1) 127 if (attr->va_mtime.tv_sec != -1)
129 inode_set_mtime_to_ts(inode, !! 128 inode->i_mtime = coda_to_timespec64(attr->va_mtime);
130 coda_to_ <<
131 if (attr->va_ctime.tv_sec != -1) 129 if (attr->va_ctime.tv_sec != -1)
132 inode_set_ctime_to_ts(inode, !! 130 inode->i_ctime = coda_to_timespec64(attr->va_ctime);
133 coda_to_ <<
134 } 131 }
135 132
136 133
137 /* 134 /*
138 * BSD sets attributes that need not be modifi 135 * BSD sets attributes that need not be modified to -1.
139 * Linux uses the valid field to indicate what 136 * Linux uses the valid field to indicate what should be
140 * looked at. The BSD type field needs to be 137 * looked at. The BSD type field needs to be deduced from linux
141 * mode. 138 * mode.
142 * So we have to do some translations here. 139 * So we have to do some translations here.
143 */ 140 */
144 141
145 void coda_iattr_to_vattr(struct iattr *iattr, 142 void coda_iattr_to_vattr(struct iattr *iattr, struct coda_vattr *vattr)
146 { 143 {
147 unsigned int valid; 144 unsigned int valid;
148 145
149 /* clean out */ 146 /* clean out */
150 vattr->va_mode = -1; 147 vattr->va_mode = -1;
151 vattr->va_uid = (vuid_t) -1; 148 vattr->va_uid = (vuid_t) -1;
152 vattr->va_gid = (vgid_t) -1; 149 vattr->va_gid = (vgid_t) -1;
153 vattr->va_size = (off_t) -1; 150 vattr->va_size = (off_t) -1;
154 vattr->va_atime.tv_sec = (int64_t) -1; 151 vattr->va_atime.tv_sec = (int64_t) -1;
155 vattr->va_atime.tv_nsec = (long) -1; 152 vattr->va_atime.tv_nsec = (long) -1;
156 vattr->va_mtime.tv_sec = (int64_t) -1; 153 vattr->va_mtime.tv_sec = (int64_t) -1;
157 vattr->va_mtime.tv_nsec = (long) -1; 154 vattr->va_mtime.tv_nsec = (long) -1;
158 vattr->va_ctime.tv_sec = (int64_t) -1; 155 vattr->va_ctime.tv_sec = (int64_t) -1;
159 vattr->va_ctime.tv_nsec = (long) -1; 156 vattr->va_ctime.tv_nsec = (long) -1;
160 vattr->va_type = C_VNON; 157 vattr->va_type = C_VNON;
161 vattr->va_fileid = -1; 158 vattr->va_fileid = -1;
162 vattr->va_gen = -1; 159 vattr->va_gen = -1;
163 vattr->va_bytes = -1; 160 vattr->va_bytes = -1;
164 vattr->va_nlink = -1; 161 vattr->va_nlink = -1;
165 vattr->va_blocksize = -1; 162 vattr->va_blocksize = -1;
166 vattr->va_rdev = -1; 163 vattr->va_rdev = -1;
167 vattr->va_flags = 0; 164 vattr->va_flags = 0;
168 165
169 /* determine the type */ 166 /* determine the type */
170 #if 0 167 #if 0
171 mode = iattr->ia_mode; 168 mode = iattr->ia_mode;
172 if ( S_ISDIR(mode) ) { 169 if ( S_ISDIR(mode) ) {
173 vattr->va_type = C_VDIR; 170 vattr->va_type = C_VDIR;
174 } else if ( S_ISREG(mode) ) { 171 } else if ( S_ISREG(mode) ) {
175 vattr->va_type = C_VREG; 172 vattr->va_type = C_VREG;
176 } else if ( S_ISLNK(mode) ) { 173 } else if ( S_ISLNK(mode) ) {
177 vattr->va_type = C_VLNK; 174 vattr->va_type = C_VLNK;
178 } else { 175 } else {
179 /* don't do others */ 176 /* don't do others */
180 vattr->va_type = C_VNON; 177 vattr->va_type = C_VNON;
181 } 178 }
182 #endif 179 #endif
183 180
184 /* set those vattrs that need change * 181 /* set those vattrs that need change */
185 valid = iattr->ia_valid; 182 valid = iattr->ia_valid;
186 if ( valid & ATTR_MODE ) { 183 if ( valid & ATTR_MODE ) {
187 vattr->va_mode = iattr->ia_mod 184 vattr->va_mode = iattr->ia_mode;
188 } 185 }
189 if ( valid & ATTR_UID ) { 186 if ( valid & ATTR_UID ) {
190 vattr->va_uid = (vuid_t) from_ 187 vattr->va_uid = (vuid_t) from_kuid(&init_user_ns, iattr->ia_uid);
191 } 188 }
192 if ( valid & ATTR_GID ) { 189 if ( valid & ATTR_GID ) {
193 vattr->va_gid = (vgid_t) from_ 190 vattr->va_gid = (vgid_t) from_kgid(&init_user_ns, iattr->ia_gid);
194 } 191 }
195 if ( valid & ATTR_SIZE ) { 192 if ( valid & ATTR_SIZE ) {
196 vattr->va_size = iattr->ia_siz 193 vattr->va_size = iattr->ia_size;
197 } 194 }
198 if ( valid & ATTR_ATIME ) { 195 if ( valid & ATTR_ATIME ) {
199 vattr->va_atime = timespec64_t 196 vattr->va_atime = timespec64_to_coda(iattr->ia_atime);
200 } 197 }
201 if ( valid & ATTR_MTIME ) { 198 if ( valid & ATTR_MTIME ) {
202 vattr->va_mtime = timespec64_t 199 vattr->va_mtime = timespec64_to_coda(iattr->ia_mtime);
203 } 200 }
204 if ( valid & ATTR_CTIME ) { 201 if ( valid & ATTR_CTIME ) {
205 vattr->va_ctime = timespec64_t 202 vattr->va_ctime = timespec64_to_coda(iattr->ia_ctime);
206 } 203 }
207 } 204 }
208 205
209 206
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.