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 */ 25int coda_fake_statfs; 26 27/* print a fid */ 28char * coda_f2s(struct CodaFid *f) 29{ 30 static char s[60]; 31 32 sprintf(s, "(%08x.%08x.%08x.%08x)", f->opaque[0], f->opaque[1], f->opaque[2], f->opaque[3]); 33 34 return s; 35} 36 37/* recognize special .CONTROL name */ 38int coda_iscontrol(const char *name, size_t length) 39{ 40 return ((CODA_CONTROLLEN == length) && 41 (strncmp(name, CODA_CONTROL, CODA_CONTROLLEN) == 0)); 42} 43 44/* recognize /coda inode */ 45int coda_isroot(struct inode *i) 46{ 47 return ( i->i_sb->s_root->d_inode == i ); 48} 49 50unsigned short coda_flags_to_cflags(unsigned short flags) 51{ 52 unsigned short coda_flags = 0; 53 54 if ((flags & O_ACCMODE) == O_RDONLY) 55 coda_flags |= C_O_READ; 56 57 if ((flags & O_ACCMODE) == O_RDWR) 58 coda_flags |= C_O_READ | C_O_WRITE; 59 60 if ((flags & O_ACCMODE) == O_WRONLY) 61 coda_flags |= C_O_WRITE; 62 63 if (flags & O_TRUNC) 64 coda_flags |= C_O_TRUNC; 65 66 if (flags & O_CREAT) 67 coda_flags |= C_O_CREAT; 68 69 if (flags & O_EXCL) 70 coda_flags |= C_O_EXCL; 71 72 return coda_flags; 73} 74 75 76/* utility functions below */ 77void coda_vattr_to_iattr(struct inode *inode, struct coda_vattr *attr) 78{ 79 int inode_type; 80 switch (attr->va_type) { 81 case C_VNON: 82 inode_type = 0; 83 break; 84 case C_VREG: 85 inode_type = S_IFREG; 86 break; 87 case C_VDIR: 88 inode_type = S_IFDIR; 89 break; 90 case C_VLNK: 91 inode_type = S_IFLNK; 92 break; 93 default: 94 inode_type = 0; 95 } 96 inode->i_mode |= inode_type; 97 98 if (attr->va_mode != (u_short) -1) 99 inode->i_mode = attr->va_mode | inode_type; 100 if (attr->va_uid != -1) 101 inode->i_uid = (uid_t) attr->va_uid; 102 if (attr->va_gid != -1) 103 inode->i_gid = (gid_t) attr->va_gid; 104 if (attr->va_nlink != -1) 105 inode->i_nlink = attr->va_nlink; 106 if (attr->va_size != -1) 107 inode->i_size = attr->va_size; 108 if (attr->va_size != -1) 109 inode->i_blocks = (attr->va_size + 511) >> 9; 110 if (attr->va_atime.tv_sec != -1) 111 inode->i_atime = attr->va_atime; 112 if (attr->va_mtime.tv_sec != -1) 113 inode->i_mtime = attr->va_mtime; 114 if (attr->va_ctime.tv_sec != -1) 115 inode->i_ctime = attr->va_ctime; 116} 117 118 119/* 120 * BSD sets attributes that need not be modified to -1. 121 * Linux uses the valid field to indicate what should be 122 * looked at. The BSD type field needs to be deduced from linux 123 * mode. 124 * So we have to do some translations here. 125 */ 126 127void coda_iattr_to_vattr(struct iattr *iattr, struct coda_vattr *vattr) 128{ 129 unsigned int valid; 130 131 /* clean out */ 132 vattr->va_mode = -1; 133 vattr->va_uid = (vuid_t) -1; 134 vattr->va_gid = (vgid_t) -1; 135 vattr->va_size = (off_t) -1; 136 vattr->va_atime.tv_sec = (time_t) -1; 137 vattr->va_atime.tv_nsec = (time_t) -1; 138 vattr->va_mtime.tv_sec = (time_t) -1; 139 vattr->va_mtime.tv_nsec = (time_t) -1; 140 vattr->va_ctime.tv_sec = (time_t) -1; 141 vattr->va_ctime.tv_nsec = (time_t) -1; 142 vattr->va_type = C_VNON; 143 vattr->va_fileid = -1; 144 vattr->va_gen = -1; 145 vattr->va_bytes = -1; 146 vattr->va_nlink = -1; 147 vattr->va_blocksize = -1; 148 vattr->va_rdev = -1; 149 vattr->va_flags = 0; 150 151 /* determine the type */ 152 153 /* set those vattrs that need change */ 154 valid = iattr->ia_valid; 155 if ( valid & ATTR_MODE ) { 156 vattr->va_mode = iattr->ia_mode; 157 } 158 if ( valid & ATTR_UID ) { 159 vattr->va_uid = (vuid_t) iattr->ia_uid; 160 } 161 if ( valid & ATTR_GID ) { 162 vattr->va_gid = (vgid_t) iattr->ia_gid; 163 } 164 if ( valid & ATTR_SIZE ) { 165 vattr->va_size = iattr->ia_size; 166 } 167 if ( valid & ATTR_ATIME ) { 168 vattr->va_atime = iattr->ia_atime; 169 } 170 if ( valid & ATTR_MTIME ) { 171 vattr->va_mtime = iattr->ia_mtime; 172 } 173 if ( valid & ATTR_CTIME ) { 174 vattr->va_ctime = iattr->ia_ctime; 175 } 176} 177