192 lines
5 KiB
C
192 lines
5 KiB
C
/*
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* Inode operations for Coda filesystem
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* Original version: (C) 1996 P. Braam and M. Callahan
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* Rewritten for Linux 2.1. (C) 1997 Carnegie Mellon University
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*
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* Carnegie Mellon encourages users to contribute improvements to
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* the Coda project. Contact Peter Braam (coda@cs.cmu.edu).
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*/
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/time.h>
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#include <linux/fs.h>
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#include <linux/stat.h>
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#include <linux/errno.h>
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#include <asm/uaccess.h>
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#include <linux/string.h>
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#include <linux/coda.h>
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#include <linux/coda_psdev.h>
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#include "coda_linux.h"
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/* initialize the debugging variables */
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int coda_fake_statfs;
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/* print a fid */
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char * coda_f2s(struct CodaFid *f)
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{
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static char s[60];
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sprintf(s, "(%08x.%08x.%08x.%08x)", f->opaque[0], f->opaque[1], f->opaque[2], f->opaque[3]);
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return s;
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}
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/* recognize special .CONTROL name */
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int coda_iscontrol(const char *name, size_t length)
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{
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return ((CODA_CONTROLLEN == length) &&
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(strncmp(name, CODA_CONTROL, CODA_CONTROLLEN) == 0));
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}
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/* recognize /coda inode */
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int coda_isroot(struct inode *i)
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{
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return ( i->i_sb->s_root->d_inode == i );
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}
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unsigned short coda_flags_to_cflags(unsigned short flags)
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{
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unsigned short coda_flags = 0;
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if ((flags & O_ACCMODE) == O_RDONLY)
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coda_flags |= C_O_READ;
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if ((flags & O_ACCMODE) == O_RDWR)
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coda_flags |= C_O_READ | C_O_WRITE;
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if ((flags & O_ACCMODE) == O_WRONLY)
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coda_flags |= C_O_WRITE;
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if (flags & O_TRUNC)
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coda_flags |= C_O_TRUNC;
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if (flags & O_CREAT)
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coda_flags |= C_O_CREAT;
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if (flags & O_EXCL)
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coda_flags |= C_O_EXCL;
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return coda_flags;
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}
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/* utility functions below */
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void coda_vattr_to_iattr(struct inode *inode, struct coda_vattr *attr)
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{
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int inode_type;
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/* inode's i_flags, i_ino are set by iget
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XXX: is this all we need ??
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*/
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switch (attr->va_type) {
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case C_VNON:
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inode_type = 0;
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break;
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case C_VREG:
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inode_type = S_IFREG;
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break;
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case C_VDIR:
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inode_type = S_IFDIR;
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break;
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case C_VLNK:
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inode_type = S_IFLNK;
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break;
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default:
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inode_type = 0;
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}
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inode->i_mode |= inode_type;
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if (attr->va_mode != (u_short) -1)
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inode->i_mode = attr->va_mode | inode_type;
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if (attr->va_uid != -1)
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inode->i_uid = (uid_t) attr->va_uid;
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if (attr->va_gid != -1)
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inode->i_gid = (gid_t) attr->va_gid;
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if (attr->va_nlink != -1)
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inode->i_nlink = attr->va_nlink;
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if (attr->va_size != -1)
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inode->i_size = attr->va_size;
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if (attr->va_size != -1)
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inode->i_blocks = (attr->va_size + 511) >> 9;
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if (attr->va_atime.tv_sec != -1)
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inode->i_atime = attr->va_atime;
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if (attr->va_mtime.tv_sec != -1)
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inode->i_mtime = attr->va_mtime;
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if (attr->va_ctime.tv_sec != -1)
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inode->i_ctime = attr->va_ctime;
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}
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/*
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* BSD sets attributes that need not be modified to -1.
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* Linux uses the valid field to indicate what should be
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* looked at. The BSD type field needs to be deduced from linux
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* mode.
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* So we have to do some translations here.
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*/
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void coda_iattr_to_vattr(struct iattr *iattr, struct coda_vattr *vattr)
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{
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unsigned int valid;
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/* clean out */
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vattr->va_mode = -1;
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vattr->va_uid = (vuid_t) -1;
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vattr->va_gid = (vgid_t) -1;
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vattr->va_size = (off_t) -1;
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vattr->va_atime.tv_sec = (time_t) -1;
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vattr->va_atime.tv_nsec = (time_t) -1;
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vattr->va_mtime.tv_sec = (time_t) -1;
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vattr->va_mtime.tv_nsec = (time_t) -1;
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vattr->va_ctime.tv_sec = (time_t) -1;
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vattr->va_ctime.tv_nsec = (time_t) -1;
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vattr->va_type = C_VNON;
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vattr->va_fileid = -1;
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vattr->va_gen = -1;
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vattr->va_bytes = -1;
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vattr->va_nlink = -1;
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vattr->va_blocksize = -1;
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vattr->va_rdev = -1;
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vattr->va_flags = 0;
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/* determine the type */
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#if 0
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mode = iattr->ia_mode;
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if ( S_ISDIR(mode) ) {
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vattr->va_type = C_VDIR;
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} else if ( S_ISREG(mode) ) {
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vattr->va_type = C_VREG;
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} else if ( S_ISLNK(mode) ) {
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vattr->va_type = C_VLNK;
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} else {
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/* don't do others */
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vattr->va_type = C_VNON;
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}
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#endif
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/* set those vattrs that need change */
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valid = iattr->ia_valid;
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if ( valid & ATTR_MODE ) {
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vattr->va_mode = iattr->ia_mode;
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}
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if ( valid & ATTR_UID ) {
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vattr->va_uid = (vuid_t) iattr->ia_uid;
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}
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if ( valid & ATTR_GID ) {
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vattr->va_gid = (vgid_t) iattr->ia_gid;
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}
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if ( valid & ATTR_SIZE ) {
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vattr->va_size = iattr->ia_size;
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}
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if ( valid & ATTR_ATIME ) {
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vattr->va_atime = iattr->ia_atime;
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}
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if ( valid & ATTR_MTIME ) {
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vattr->va_mtime = iattr->ia_mtime;
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}
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if ( valid & ATTR_CTIME ) {
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vattr->va_ctime = iattr->ia_ctime;
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}
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}
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