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
6 * Carnegie Mellon encourages users to contribute improvements to
7 * the Coda project. Contact Peter Braam (coda@cs.cmu.edu).
10 #include <linux/types.h>
11 #include <linux/kernel.h>
12 #include <linux/time.h>
14 #include <linux/stat.h>
15 #include <linux/errno.h>
16 #include <asm/uaccess.h>
17 #include <linux/string.h>
19 #include <linux/coda.h>
20 #include <linux/coda_psdev.h>
21 #include "coda_linux.h"
23 /* initialize the debugging variables */
27 char * coda_f2s(struct CodaFid *f)
31 sprintf(s, "(%08x.%08x.%08x.%08x)", f->opaque[0], f->opaque[1], f->opaque[2], f->opaque[3]);
36 /* recognize special .CONTROL name */
37 int coda_iscontrol(const char *name, size_t length)
39 return ((CODA_CONTROLLEN == length) &&
40 (strncmp(name, CODA_CONTROL, CODA_CONTROLLEN) == 0));
43 /* recognize /coda inode */
44 int coda_isroot(struct inode *i)
46 return ( i->i_sb->s_root->d_inode == i );
49 unsigned short coda_flags_to_cflags(unsigned short flags)
51 unsigned short coda_flags = 0;
53 if ((flags & O_ACCMODE) == O_RDONLY)
54 coda_flags |= C_O_READ;
56 if ((flags & O_ACCMODE) == O_RDWR)
57 coda_flags |= C_O_READ | C_O_WRITE;
59 if ((flags & O_ACCMODE) == O_WRONLY)
60 coda_flags |= C_O_WRITE;
63 coda_flags |= C_O_TRUNC;
66 coda_flags |= C_O_CREAT;
69 coda_flags |= C_O_EXCL;
75 /* utility functions below */
76 void coda_vattr_to_iattr(struct inode *inode, struct coda_vattr *attr)
79 /* inode's i_flags, i_ino are set by iget
80 XXX: is this all we need ??
82 switch (attr->va_type) {
98 inode->i_mode |= inode_type;
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 set_nlink(inode, 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;
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
126 * So we have to do some translations here.
129 void coda_iattr_to_vattr(struct iattr *iattr, struct coda_vattr *vattr)
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;
147 vattr->va_bytes = -1;
148 vattr->va_nlink = -1;
149 vattr->va_blocksize = -1;
153 /* determine the type */
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;
163 /* don't do others */
164 vattr->va_type = C_VNON;
168 /* set those vattrs that need change */
169 valid = iattr->ia_valid;
170 if ( valid & ATTR_MODE ) {
171 vattr->va_mode = iattr->ia_mode;
173 if ( valid & ATTR_UID ) {
174 vattr->va_uid = (vuid_t) iattr->ia_uid;
176 if ( valid & ATTR_GID ) {
177 vattr->va_gid = (vgid_t) iattr->ia_gid;
179 if ( valid & ATTR_SIZE ) {
180 vattr->va_size = iattr->ia_size;
182 if ( valid & ATTR_ATIME ) {
183 vattr->va_atime = iattr->ia_atime;
185 if ( valid & ATTR_MTIME ) {
186 vattr->va_mtime = iattr->ia_mtime;
188 if ( valid & ATTR_CTIME ) {
189 vattr->va_ctime = iattr->ia_ctime;