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/*
* 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/sched.h>
#include <linux/fs.h>
#include <linux/stat.h>
#include <linux/errno.h>
#include <linux/locks.h>
#include <asm/segment.h>
#include <asm/uaccess.h>
#include <linux/string.h>
#include <linux/coda.h>
#include <linux/coda_linux.h>
#include <linux/coda_psdev.h>
#include <linux/coda_fs_i.h>
#include <linux/coda_cache.h>
/* initialize the debugging variables */
int coda_debug = 0;
int coda_print_entry = 0;
int coda_access_cache = 1;
/* caller must allocate 36 byte string ! */
char * coda_f2s(ViceFid *f)
{
static char s[60];
if ( f ) {
sprintf(s, "(%-#lx,%-#lx,%-#lx)",
f->Volume, f->Vnode, f->Unique);
}
return s;
}
/* recognize special .CONTROL name */
int coda_iscontrol(const char *name, size_t length)
{
if ((CFS_CONTROLLEN == length) &&
(strncmp(name, CFS_CONTROL, CFS_CONTROLLEN) == 0))
return 1;
return 0;
}
/* recognize /coda inode */
int coda_isroot(struct inode *i)
{
if ( i->i_sb->s_root->d_inode == i ) {
return 1;
} else {
return 0;
}
}
/* is this a volume root FID */
int coda_fid_is_volroot(struct ViceFid *fid)
{
return ( (fid->Vnode == 1) && (fid->Unique == 1 ) );
}
/* put the current process credentials in the cred */
void coda_load_creds(struct coda_cred *cred)
{
cred->cr_uid = (vuid_t) current->uid;
cred->cr_euid = (vuid_t) current->euid;
cred->cr_suid = (vuid_t) current->suid;
cred->cr_fsuid = (vuid_t) current->fsuid;
cred->cr_gid = (vgid_t) current->gid;
cred->cr_egid = (vgid_t) current->egid;
cred->cr_sgid = (vgid_t) current->sgid;
cred->cr_fsgid = (vgid_t) current->fsgid;
}
int coda_cred_ok(struct coda_cred *cred)
{
return(current->fsuid == cred->cr_fsuid);
}
int coda_cred_eq(struct coda_cred *cred1, struct coda_cred *cred2)
{
return (cred1->cr_fsuid == cred2->cr_fsuid);
}
unsigned short coda_flags_to_cflags(unsigned short flags)
{
unsigned short coda_flags = 0;
if ( flags & (O_RDONLY | O_RDWR) )
coda_flags |= C_O_READ;
if ( flags & (O_WRONLY | O_RDWR) )
coda_flags |= C_O_WRITE;
if ( flags & O_TRUNC )
coda_flags |= C_O_TRUNC;
return coda_flags;
}
/* utility functions below */
void coda_vattr_to_iattr(struct inode *inode, struct coda_vattr *attr)
{
int inode_type;
/* inode's i_dev, 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)
inode->i_nlink = attr->va_nlink;
if (attr->va_size != -1)
inode->i_size = attr->va_size;
/* XXX This needs further study */
/*
inode->i_blksize = attr->va_blocksize;
inode->i_blocks = attr->va_size/attr->va_blocksize
+ (attr->va_size % attr->va_blocksize ? 1 : 0);
*/
if (attr->va_atime.tv_sec != -1)
inode->i_atime = attr->va_atime.tv_sec;
if (attr->va_mtime.tv_sec != -1)
inode->i_mtime = attr->va_mtime.tv_sec;
if (attr->va_ctime.tv_sec != -1)
inode->i_ctime = attr->va_ctime.tv_sec;
}
/*
* 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 = (umode_t) -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_mtime.tv_sec = (time_t) -1;
vattr->va_ctime.tv_sec = (time_t) -1;
vattr->va_atime.tv_nsec = (time_t) -1;
vattr->va_mtime.tv_nsec = (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.tv_sec = iattr->ia_atime;
vattr->va_atime.tv_nsec = 0;
}
if ( valid & ATTR_MTIME ) {
vattr->va_mtime.tv_sec = iattr->ia_mtime;
vattr->va_mtime.tv_nsec = 0;
}
if ( valid & ATTR_CTIME ) {
vattr->va_ctime.tv_sec = iattr->ia_ctime;
vattr->va_ctime.tv_nsec = 0;
}
}
void print_vattr(struct coda_vattr *attr)
{
char *typestr;
switch (attr->va_type) {
case C_VNON:
typestr = "C_VNON";
break;
case C_VREG:
typestr = "C_VREG";
break;
case C_VDIR:
typestr = "C_VDIR";
break;
case C_VBLK:
typestr = "C_VBLK";
break;
case C_VCHR:
typestr = "C_VCHR";
break;
case C_VLNK:
typestr = "C_VLNK";
break;
case C_VSOCK:
typestr = "C_VSCK";
break;
case C_VFIFO:
typestr = "C_VFFO";
break;
case C_VBAD:
typestr = "C_VBAD";
break;
default:
typestr = "????";
break;
}
printk("attr: type %s (%o) mode %o uid %d gid %d rdev %d\n",
typestr, (int)attr->va_type, (int)attr->va_mode,
(int)attr->va_uid, (int)attr->va_gid, (int)attr->va_rdev);
printk(" fileid %d nlink %d size %d blocksize %d bytes %d\n",
(int)attr->va_fileid, (int)attr->va_nlink,
(int)attr->va_size,
(int)attr->va_blocksize,(int)attr->va_bytes);
printk(" gen %ld flags %ld\n",
attr->va_gen, attr->va_flags);
printk(" atime sec %d nsec %d\n",
(int)attr->va_atime.tv_sec, (int)attr->va_atime.tv_nsec);
printk(" mtime sec %d nsec %d\n",
(int)attr->va_mtime.tv_sec, (int)attr->va_mtime.tv_nsec);
printk(" ctime sec %d nsec %d\n",
(int)attr->va_ctime.tv_sec, (int)attr->va_ctime.tv_nsec);
}
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