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_linux.h> 21 #include <linux/coda_psdev.h> 22 #include <linux/coda_fs_i.h> 23 24 /* initialize the debugging variables */ 25 int coda_fake_statfs; 26 27 /* print a fid */ 28 char * coda_f2s(struct CodaFid *f) 29 { 30 static char s[60]; 31 #ifdef CONFIG_CODA_FS_OLD_API 32 sprintf(s, "(%08x.%08x.%08x)", f->opaque[0], f->opaque[1], f->opaque[2]); 33 #else 34 sprintf(s, "(%08x.%08x.%08x.%08x)", f->opaque[0], f->opaque[1], f->opaque[2], f->opaque[3]); 35 #endif 36 return s; 37 } 38 39 /* recognize special .CONTROL name */ 40 int coda_iscontrol(const char *name, size_t length) 41 { 42 return ((CODA_CONTROLLEN == length) && 43 (strncmp(name, CODA_CONTROL, CODA_CONTROLLEN) == 0)); 44 } 45 46 /* recognize /coda inode */ 47 int coda_isroot(struct inode *i) 48 { 49 return ( i->i_sb->s_root->d_inode == i ); 50 } 51 52 unsigned short coda_flags_to_cflags(unsigned short flags) 53 { 54 unsigned short coda_flags = 0; 55 56 if ((flags & O_ACCMODE) == O_RDONLY) 57 coda_flags |= C_O_READ; 58 59 if ((flags & O_ACCMODE) == O_RDWR) 60 coda_flags |= C_O_READ | C_O_WRITE; 61 62 if ((flags & O_ACCMODE) == O_WRONLY) 63 coda_flags |= C_O_WRITE; 64 65 if (flags & O_TRUNC) 66 coda_flags |= C_O_TRUNC; 67 68 if (flags & O_CREAT) 69 coda_flags |= C_O_CREAT; 70 71 if (flags & O_EXCL) 72 coda_flags |= C_O_EXCL; 73 74 return coda_flags; 75 } 76 77 78 /* utility functions below */ 79 void coda_vattr_to_iattr(struct inode *inode, struct coda_vattr *attr) 80 { 81 int inode_type; 82 /* inode's i_flags, i_ino are set by iget 83 XXX: is this all we need ?? 84 */ 85 switch (attr->va_type) { 86 case C_VNON: 87 inode_type = 0; 88 break; 89 case C_VREG: 90 inode_type = S_IFREG; 91 break; 92 case C_VDIR: 93 inode_type = S_IFDIR; 94 break; 95 case C_VLNK: 96 inode_type = S_IFLNK; 97 break; 98 default: 99 inode_type = 0; 100 } 101 inode->i_mode |= inode_type; 102 103 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_blocksize != -1) 114 inode->i_blksize = attr->va_blocksize; 115 if (attr->va_size != -1) 116 inode->i_blocks = (attr->va_size + 511) >> 9; 117 if (attr->va_atime.tv_sec != -1) 118 inode->i_atime = attr->va_atime; 119 if (attr->va_mtime.tv_sec != -1) 120 inode->i_mtime = attr->va_mtime; 121 if (attr->va_ctime.tv_sec != -1) 122 inode->i_ctime = attr->va_ctime; 123 } 124 125 126 /* 127 * BSD sets attributes that need not be modified to -1. 128 * Linux uses the valid field to indicate what should be 129 * looked at. The BSD type field needs to be deduced from linux 130 * mode. 131 * So we have to do some translations here. 132 */ 133 134 void coda_iattr_to_vattr(struct iattr *iattr, struct coda_vattr *vattr) 135 { 136 unsigned int valid; 137 138 /* clean out */ 139 vattr->va_mode = (umode_t) -1; 140 vattr->va_uid = (vuid_t) -1; 141 vattr->va_gid = (vgid_t) -1; 142 vattr->va_size = (off_t) -1; 143 vattr->va_atime.tv_sec = (time_t) -1; 144 vattr->va_atime.tv_nsec = (time_t) -1; 145 vattr->va_mtime.tv_sec = (time_t) -1; 146 vattr->va_mtime.tv_nsec = (time_t) -1; 147 vattr->va_ctime.tv_sec = (time_t) -1; 148 vattr->va_ctime.tv_nsec = (time_t) -1; 149 vattr->va_type = C_VNON; 150 vattr->va_fileid = -1; 151 vattr->va_gen = -1; 152 vattr->va_bytes = -1; 153 vattr->va_nlink = -1; 154 vattr->va_blocksize = -1; 155 vattr->va_rdev = -1; 156 vattr->va_flags = 0; 157 158 /* determine the type */ 159 #if 0 160 mode = iattr->ia_mode; 161 if ( S_ISDIR(mode) ) { 162 vattr->va_type = C_VDIR; 163 } else if ( S_ISREG(mode) ) { 164 vattr->va_type = C_VREG; 165 } else if ( S_ISLNK(mode) ) { 166 vattr->va_type = C_VLNK; 167 } else { 168 /* don't do others */ 169 vattr->va_type = C_VNON; 170 } 171 #endif 172 173 /* set those vattrs that need change */ 174 valid = iattr->ia_valid; 175 if ( valid & ATTR_MODE ) { 176 vattr->va_mode = iattr->ia_mode; 177 } 178 if ( valid & ATTR_UID ) { 179 vattr->va_uid = (vuid_t) iattr->ia_uid; 180 } 181 if ( valid & ATTR_GID ) { 182 vattr->va_gid = (vgid_t) iattr->ia_gid; 183 } 184 if ( valid & ATTR_SIZE ) { 185 vattr->va_size = iattr->ia_size; 186 } 187 if ( valid & ATTR_ATIME ) { 188 vattr->va_atime = iattr->ia_atime; 189 } 190 if ( valid & ATTR_MTIME ) { 191 vattr->va_mtime = iattr->ia_mtime; 192 } 193 if ( valid & ATTR_CTIME ) { 194 vattr->va_ctime = iattr->ia_ctime; 195 } 196 } 197 198