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