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_linux.h>
21 #include <linux/coda_psdev.h>
22 #include <linux/coda_fs_i.h>
24 /* initialize the debugging variables */
28 char * coda_f2s(struct CodaFid *f)
31 #ifdef CONFIG_CODA_FS_OLD_API
32 sprintf(s, "(%08x.%08x.%08x)", f->opaque[0], f->opaque[1], f->opaque[2]);
34 sprintf(s, "(%08x.%08x.%08x.%08x)", f->opaque[0], f->opaque[1], f->opaque[2], f->opaque[3]);
39 /* recognize special .CONTROL name */
40 int coda_iscontrol(const char *name, size_t length)
42 return ((CODA_CONTROLLEN == length) &&
43 (strncmp(name, CODA_CONTROL, CODA_CONTROLLEN) == 0));
46 /* recognize /coda inode */
47 int coda_isroot(struct inode *i)
49 return ( i->i_sb->s_root->d_inode == i );
52 unsigned short coda_flags_to_cflags(unsigned short flags)
54 unsigned short coda_flags = 0;
56 if ((flags & O_ACCMODE) == O_RDONLY)
57 coda_flags |= C_O_READ;
59 if ((flags & O_ACCMODE) == O_RDWR)
60 coda_flags |= C_O_READ | C_O_WRITE;
62 if ((flags & O_ACCMODE) == O_WRONLY)
63 coda_flags |= C_O_WRITE;
66 coda_flags |= C_O_TRUNC;
69 coda_flags |= C_O_CREAT;
72 coda_flags |= C_O_EXCL;
78 /* utility functions below */
79 void coda_vattr_to_iattr(struct inode *inode, struct coda_vattr *attr)
82 /* inode's i_flags, i_ino are set by iget
83 XXX: is this all we need ??
85 switch (attr->va_type) {
101 inode->i_mode |= inode_type;
103 if (attr->va_mode != (u_short) -1)
104 inode->i_mode = attr->va_mode | inode_type;
105 if (attr->va_uid != -1)
106 inode->i_uid = (uid_t) attr->va_uid;
107 if (attr->va_gid != -1)
108 inode->i_gid = (gid_t) attr->va_gid;
109 if (attr->va_nlink != -1)
110 inode->i_nlink = attr->va_nlink;
111 if (attr->va_size != -1)
112 inode->i_size = attr->va_size;
113 if (attr->va_size != -1)
114 inode->i_blocks = (attr->va_size + 511) >> 9;
115 if (attr->va_atime.tv_sec != -1)
116 inode->i_atime = attr->va_atime;
117 if (attr->va_mtime.tv_sec != -1)
118 inode->i_mtime = attr->va_mtime;
119 if (attr->va_ctime.tv_sec != -1)
120 inode->i_ctime = attr->va_ctime;
125 * BSD sets attributes that need not be modified to -1.
126 * Linux uses the valid field to indicate what should be
127 * looked at. The BSD type field needs to be deduced from linux
129 * So we have to do some translations here.
132 void coda_iattr_to_vattr(struct iattr *iattr, struct coda_vattr *vattr)
137 vattr->va_mode = (umode_t) -1;
138 vattr->va_uid = (vuid_t) -1;
139 vattr->va_gid = (vgid_t) -1;
140 vattr->va_size = (off_t) -1;
141 vattr->va_atime.tv_sec = (time_t) -1;
142 vattr->va_atime.tv_nsec = (time_t) -1;
143 vattr->va_mtime.tv_sec = (time_t) -1;
144 vattr->va_mtime.tv_nsec = (time_t) -1;
145 vattr->va_ctime.tv_sec = (time_t) -1;
146 vattr->va_ctime.tv_nsec = (time_t) -1;
147 vattr->va_type = C_VNON;
148 vattr->va_fileid = -1;
150 vattr->va_bytes = -1;
151 vattr->va_nlink = -1;
152 vattr->va_blocksize = -1;
156 /* determine the type */
158 mode = iattr->ia_mode;
159 if ( S_ISDIR(mode) ) {
160 vattr->va_type = C_VDIR;
161 } else if ( S_ISREG(mode) ) {
162 vattr->va_type = C_VREG;
163 } else if ( S_ISLNK(mode) ) {
164 vattr->va_type = C_VLNK;
166 /* don't do others */
167 vattr->va_type = C_VNON;
171 /* set those vattrs that need change */
172 valid = iattr->ia_valid;
173 if ( valid & ATTR_MODE ) {
174 vattr->va_mode = iattr->ia_mode;
176 if ( valid & ATTR_UID ) {
177 vattr->va_uid = (vuid_t) iattr->ia_uid;
179 if ( valid & ATTR_GID ) {
180 vattr->va_gid = (vgid_t) iattr->ia_gid;
182 if ( valid & ATTR_SIZE ) {
183 vattr->va_size = iattr->ia_size;
185 if ( valid & ATTR_ATIME ) {
186 vattr->va_atime = iattr->ia_atime;
188 if ( valid & ATTR_MTIME ) {
189 vattr->va_mtime = iattr->ia_mtime;
191 if ( valid & ATTR_CTIME ) {
192 vattr->va_ctime = iattr->ia_ctime;