1 // SPDX-License-Identifier: GPL-2.0
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
7 * Carnegie Mellon encourages users to contribute improvements to
11 #include <linux/types.h>
12 #include <linux/kernel.h>
13 #include <linux/time.h>
15 #include <linux/stat.h>
16 #include <linux/errno.h>
17 #include <linux/uaccess.h>
18 #include <linux/string.h>
20 #include <linux/coda.h>
21 #include <linux/coda_psdev.h>
22 #include "coda_linux.h"
24 /* initialize the debugging variables */
28 char * coda_f2s(struct CodaFid *f)
32 sprintf(s, "(%08x.%08x.%08x.%08x)", f->opaque[0], f->opaque[1], f->opaque[2], f->opaque[3]);
37 /* recognize special .CONTROL name */
38 int coda_iscontrol(const char *name, size_t length)
40 return ((CODA_CONTROLLEN == length) &&
41 (strncmp(name, CODA_CONTROL, CODA_CONTROLLEN) == 0));
44 unsigned short coda_flags_to_cflags(unsigned short flags)
46 unsigned short coda_flags = 0;
48 if ((flags & O_ACCMODE) == O_RDONLY)
49 coda_flags |= C_O_READ;
51 if ((flags & O_ACCMODE) == O_RDWR)
52 coda_flags |= C_O_READ | C_O_WRITE;
54 if ((flags & O_ACCMODE) == O_WRONLY)
55 coda_flags |= C_O_WRITE;
58 coda_flags |= C_O_TRUNC;
61 coda_flags |= C_O_CREAT;
64 coda_flags |= C_O_EXCL;
70 /* utility functions below */
71 void coda_vattr_to_iattr(struct inode *inode, struct coda_vattr *attr)
74 /* inode's i_flags, i_ino are set by iget
75 XXX: is this all we need ??
77 switch (attr->va_type) {
93 inode->i_mode |= inode_type;
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 = timespec_to_timespec64(attr->va_atime);
109 if (attr->va_mtime.tv_sec != -1)
110 inode->i_mtime = timespec_to_timespec64(attr->va_mtime);
111 if (attr->va_ctime.tv_sec != -1)
112 inode->i_ctime = timespec_to_timespec64(attr->va_ctime);
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
121 * So we have to do some translations here.
124 void coda_iattr_to_vattr(struct iattr *iattr, struct coda_vattr *vattr)
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;
142 vattr->va_bytes = -1;
143 vattr->va_nlink = -1;
144 vattr->va_blocksize = -1;
148 /* determine the type */
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;
158 /* don't do others */
159 vattr->va_type = C_VNON;
163 /* set those vattrs that need change */
164 valid = iattr->ia_valid;
165 if ( valid & ATTR_MODE ) {
166 vattr->va_mode = iattr->ia_mode;
168 if ( valid & ATTR_UID ) {
169 vattr->va_uid = (vuid_t) from_kuid(&init_user_ns, iattr->ia_uid);
171 if ( valid & ATTR_GID ) {
172 vattr->va_gid = (vgid_t) from_kgid(&init_user_ns, iattr->ia_gid);
174 if ( valid & ATTR_SIZE ) {
175 vattr->va_size = iattr->ia_size;
177 if ( valid & ATTR_ATIME ) {
178 vattr->va_atime = timespec64_to_timespec(iattr->ia_atime);
180 if ( valid & ATTR_MTIME ) {
181 vattr->va_mtime = timespec64_to_timespec(iattr->ia_mtime);
183 if ( valid & ATTR_CTIME ) {
184 vattr->va_ctime = timespec64_to_timespec(iattr->ia_ctime);