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/* cnode related routines for the coda kernel code
(C) 1996 Peter Braam
*/
#include <linux/types.h>
#include <linux/time.h>
#include <linux/coda.h>
#include <linux/coda_linux.h>
#include <linux/coda_fs_i.h>
#include <linux/coda_psdev.h>
extern int coda_debug;
extern int coda_print_entry;
/* cnode.c */
static void coda_fill_inode(struct inode *inode, struct coda_vattr *attr)
{
CDEBUG(D_SUPER, "ino: %ld\n", inode->i_ino);
if (coda_debug & D_SUPER )
print_vattr(attr);
coda_vattr_to_iattr(inode, attr);
if (S_ISREG(inode->i_mode))
inode->i_op = &coda_file_inode_operations;
else if (S_ISDIR(inode->i_mode))
inode->i_op = &coda_dir_inode_operations;
else if (S_ISLNK(inode->i_mode))
inode->i_op = &coda_symlink_inode_operations;
else if (S_ISCHR(inode->i_mode)) {
inode->i_op = &chrdev_inode_operations;
inode->i_rdev = to_kdev_t(attr->va_rdev);
} else if (S_ISBLK(inode->i_mode)) {
inode->i_op = &blkdev_inode_operations;
inode->i_rdev = to_kdev_t(attr->va_rdev);
} else if (S_ISFIFO(inode->i_mode))
init_fifo(inode);
else if (S_ISSOCK(inode->i_mode))
inode->i_op = NULL;
else {
printk ("coda_read_inode: what's this? i_mode = %o\n",
inode->i_mode);
inode->i_op = NULL;
}
}
/* this is effectively coda_iget:
- get attributes (might be cached)
- get the inode for the fid using vfs iget
- link the two up if this is needed
- fill in the attributes
*/
int coda_cnode_make(struct inode **inode, ViceFid *fid, struct super_block *sb)
{
struct coda_inode_info *cnp;
struct coda_sb_info *sbi= coda_sbp(sb);
struct coda_vattr attr;
int error;
ino_t ino;
ENTRY;
/*
* We get inode numbers from Venus -- see venus source
*/
error = venus_getattr(sb, fid, &attr);
if ( error ) {
CDEBUG(D_CNODE, "coda_cnode_make: coda_getvattr returned %d for %s.\n",
error, coda_f2s(fid));
*inode = NULL;
return error;
}
ino = attr.va_fileid;
*inode = iget(sb, ino);
if ( !*inode ) {
printk("coda_cnode_make: iget failed\n");
return -ENOMEM;
}
cnp = ITOC(*inode);
if ( cnp->c_magic == 0 ) {
memset(cnp, 0, (int) sizeof(struct coda_inode_info));
cnp->c_fid = *fid;
cnp->c_magic = CODA_CNODE_MAGIC;
cnp->c_flags = 0;
cnp->c_vnode = *inode;
INIT_LIST_HEAD(&(cnp->c_cnhead));
INIT_LIST_HEAD(&(cnp->c_volrootlist));
} else {
cnp->c_flags = 0;
CDEBUG(D_CNODE, "coda_cnode make on initialized"
"inode %ld, %s!\n",
(*inode)->i_ino, coda_f2s(&cnp->c_fid));
}
/* fill in the inode attributes */
if ( coda_f2i(fid) != ino ) {
if ( !coda_fid_is_weird(fid) )
printk("Coda: unknown weird fid: ino %ld, fid %s."
"Tell Peter.\n", ino, coda_f2s(&cnp->c_fid));
list_add(&cnp->c_volrootlist, &sbi->sbi_volroothead);
CDEBUG(D_UPCALL, "Added %ld ,%s to volroothead\n",
ino, coda_f2s(&cnp->c_fid));
}
coda_fill_inode(*inode, &attr);
CDEBUG(D_DOWNCALL, "Done making inode: ino %ld, count %d with %s\n",
(*inode)->i_ino, (*inode)->i_count,
coda_f2s(&cnp->c_fid));
EXIT;
return 0;
}
inline int coda_fideq(ViceFid *fid1, ViceFid *fid2)
{
int eq;
eq = ( (fid1->Vnode == fid2->Vnode) &&
(fid1->Volume == fid2->Volume) &&
(fid1->Unique == fid2->Unique) );
return eq;
}
/* convert a fid to an inode. Mostly we can compute
the inode number from the FID, but not for volume
mount points: those are in a list */
struct inode *coda_fid_to_inode(ViceFid *fid, struct super_block *sb)
{
ino_t nr;
struct inode *inode;
struct coda_inode_info *cnp;
ENTRY;
if ( !sb ) {
printk("coda_fid_to_inode: no sb!\n");
return NULL;
}
if ( !fid ) {
printk("coda_fid_to_inode: no fid!\n");
return NULL;
}
CDEBUG(D_INODE, "%s\n", coda_f2s(fid));
if ( coda_fid_is_weird(fid) ) {
struct coda_inode_info *cii;
struct list_head *lh, *le;
struct coda_sb_info *sbi = coda_sbp(sb);
le = lh = &sbi->sbi_volroothead;
while ( (le = le->next) != lh ) {
cii = list_entry(le, struct coda_inode_info,
c_volrootlist);
CDEBUG(D_DOWNCALL, "iterating, now doing %s, ino %ld\n",
coda_f2s(&cii->c_fid), cii->c_vnode->i_ino);
if ( coda_fideq(&cii->c_fid, fid) ) {
inode = cii->c_vnode;
CDEBUG(D_INODE, "volume root, found %ld\n", cii->c_vnode->i_ino);
if ( cii->c_magic != CODA_CNODE_MAGIC )
printk("%s: Bad magic in inode, tell Peter.\n",
__FUNCTION__);
return cii->c_vnode;
}
}
return NULL;
}
/* fid is not weird: ino should be computable */
nr = coda_f2i(fid);
inode = iget(sb, nr);
if ( !inode ) {
printk("coda_fid_to_inode: null from iget, sb %p, nr %ld.\n",
sb, nr);
return NULL;
}
/* check if this inode is linked to a cnode */
cnp = ITOC(inode);
if ( cnp->c_magic != CODA_CNODE_MAGIC ) {
CDEBUG(D_INODE, "uninitialized inode. Return.\n");
iput(inode);
return NULL;
}
/* make sure fid is the one we want;
unfortunately Venus will shamelessly send us mount-symlinks.
These have the same inode as the root of the volume they
mount, but the fid will be wrong.
*/
if ( !coda_fideq(fid, &(cnp->c_fid)) ) {
/* printk("coda_fid2inode: bad cnode (ino %ld, fid %s)"
"Tell Peter.\n", nr, coda_f2s(fid)); */
iput(inode);
return NULL;
}
CDEBUG(D_INODE, "found %ld\n", inode->i_ino);
iput(inode);
return inode;
}
/* the CONTROL inode is made without asking attributes from Venus */
int coda_cnode_makectl(struct inode **inode, struct super_block *sb)
{
int error = 0;
*inode = iget(sb, CTL_INO);
if ( *inode ) {
(*inode)->i_op = &coda_ioctl_inode_operations;
(*inode)->i_mode = 00444;
error = 0;
} else {
error = -ENOMEM;
}
return error;
}
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