/*
* linux/fs/ufs/ufs_inode.c
*
* Copyright (C) 1996
* Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
* Laboratory for Computer Science Research Computing Facility
* Rutgers, The State University of New Jersey
*
* $Id: ufs_inode.c,v 1.3 1996/04/25 09:12:05 davem Exp $
*
*/
#include <linux/fs.h>
#include <linux/ufs_fs.h>
#include <linux/sched.h>
extern struct inode_operations ufs_file_inode_operations;
extern struct inode_operations ufs_dir_inode_operations;
extern struct inode_operations ufs_symlink_inode_operations;
extern struct file_operations ufs_file_operations;
extern struct file_operations ufs_dir_operations;
extern struct file_operations ufs_symlink_operations;
void ufs_print_inode(struct inode * inode)
{
printk("ino %lu mode 0%6.6o lk %d uid %d gid %d sz %lu blks %lu cnt %u\n",
inode->i_ino, inode->i_mode, inode->i_nlink, inode->i_uid, inode->i_gid, inode->i_size, inode->i_blocks, inode->i_count);
printk(" db <0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x>\n",
inode->u.ufs_i.ui_db[0], inode->u.ufs_i.ui_db[1],
inode->u.ufs_i.ui_db[2], inode->u.ufs_i.ui_db[3],
inode->u.ufs_i.ui_db[4], inode->u.ufs_i.ui_db[5],
inode->u.ufs_i.ui_db[6], inode->u.ufs_i.ui_db[7],
inode->u.ufs_i.ui_db[8], inode->u.ufs_i.ui_db[9],
inode->u.ufs_i.ui_db[10], inode->u.ufs_i.ui_db[11]);
printk(" gen 0x%8.8x ib <0x%x 0x%x 0x%x>\n",
inode->u.ufs_i.ui_gen, inode->u.ufs_i.ui_ib[0],
inode->u.ufs_i.ui_ib[1], inode->u.ufs_i.ui_ib[2]);
}
/* XXX - ufs_read_inode is a mess */
void ufs_read_inode(struct inode * inode)
{
struct super_block * sb;
struct ufs_inode * ufsip;
struct buffer_head * bh;
sb = inode->i_sb;
if (ufs_ino_ok(inode)) {
printk("ufs_read_inode: bad inum %lu", inode->i_ino);
return;
}
#if 0
printk("ufs_read_inode: ino %lu cg %u cgino %u ipg %u inopb %u\n",
inode->i_ino, ufs_ino2cg(inode),
(inode->i_ino%sb->u.ufs_sb.s_inopb),
sb->u.ufs_sb.s_ipg, sb->u.ufs_sb.s_inopb);
#endif
bh = bread(inode->i_dev,
ufs_cgimin(inode->i_sb, ufs_ino2cg(inode)) +
(inode->i_ino%sb->u.ufs_sb.s_ipg)/(sb->u.ufs_sb.s_inopb/sb->u.ufs_sb.s_fsfrag),
BLOCK_SIZE);
if (!bh) {
printk("ufs_read_inode: can't read inode %lu from dev %d/%d",
inode->i_ino, MAJOR(inode->i_dev), MINOR(inode->i_dev));
return;
}
ufsip = (struct ufs_inode *)bh->b_data;
ufsip += (inode->i_ino%(sb->u.ufs_sb.s_inopb/sb->u.ufs_sb.s_fsfrag));
/*
* Copy data to the in-core inode.
*/
inode->i_mode = ufsip->ui_mode;
inode->i_nlink = ufsip->ui_nlink;
if (inode->i_nlink == 0) {
/* XXX */
printk("ufs_read_inode: zero nlink ino %lu dev %u/%u\n",
inode->i_ino, MAJOR(inode->i_dev), MINOR(inode->i_dev));
inode->i_nlink = 1;
printk("ufs_read_inode: fishy ino %lu pblk %lu dev %u/%u\n",
inode->i_ino,
ufs_cgimin(inode->i_sb, ufs_ino2cg(inode)) +
(inode->i_ino%sb->u.ufs_sb.s_ipg)/sb->u.ufs_sb.s_inopb,
MAJOR(inode->i_dev), MINOR(inode->i_dev));
}
/* XXX - debugging */
if (ufsip->ui_gen == 0) {
printk("ufs_read_inode: zero gen ino %lu pblk %lu dev %u/%u\n",
inode->i_ino,
ufs_cgimin(inode->i_sb, ufs_ino2cg(inode)) +
(inode->i_ino%sb->u.ufs_sb.s_ipg)/sb->u.ufs_sb.s_inopb,
MAJOR(inode->i_dev), MINOR(inode->i_dev));
}
/*
* Since Linux currently only has 16-bit uid_t and gid_t, we can't
* really support EFTs. For the moment, we use 0 as the uid and gid
* if an inode has a uid or gid that won't fit in 16 bits. This way
* random users can't get at these files, since they get dynamically
* "chown()ed" to root.
*/
if (ufsip->ui_suid == UFS_USEEFT) {
/* EFT */
inode->i_uid = 0;
printk("ufs_read_inode: EFT uid %u ino %lu dev %u/%u, using %u\n",
ufsip->ui_uid, inode->i_ino, MAJOR(inode->i_dev), MINOR(inode->i_dev),
inode->i_uid);
} else {
inode->i_uid = ufsip->ui_suid;
}
if (ufsip->ui_suid == UFS_USEEFT) {
/* EFT */
inode->i_uid = 0;
printk("ufs_read_inode: EFT gid %u ino %lu dev %u/%u, using %u\n",
ufsip->ui_gid, inode->i_ino, MAJOR(inode->i_dev), MINOR(inode->i_dev),
inode->i_gid);
} else {
inode->i_gid = ufsip->ui_sgid;
}
/*
* Linux i_size is 32 bits, so some files on a UFS filesystem may not
* be readable. I let people access the first 32 bits worth of them.
* for the rw code, we may want to mark these inodes as read-only.
* XXX - bug Linus to make i_size a __u64 instead of a __u32.
*/
inode->u.ufs_i.ui_size = ((__u64)(ufsip->ui_size.val[0])<<32) | (__u64)(ufsip->ui_size.val[1]);
inode->i_size = ufsip->ui_size.val[1]; /* XXX - endianity */
if (ufsip->ui_size.val[0] != 0) {
inode->i_size = 0xffffffff;
printk("ufs_read_inode: file too big ino %lu dev %u/%u, faking size\n",
inode->i_ino, MAJOR(inode->i_dev), MINOR(inode->i_dev));
}
/*
* Linux doesn't keep tv_usec around in the kernel, so we discard it.
* XXX - I'm not sure what I should do about writing things. I may
* want to keep this data, but for the moment I think I'll just write
* zeros for these fields when writing out inodes.
*/
inode->i_atime = ufsip->ui_atime.tv_sec;
inode->i_mtime = ufsip->ui_mtime.tv_sec;
inode->i_ctime = ufsip->ui_ctime.tv_sec;
inode->i_blksize = sb->u.ufs_sb.s_fsize;
inode->i_blocks = ufsip->ui_blocks;
inode->i_version = ++event; /* see linux/kernel/sched.c */
if (S_ISREG(inode->i_mode)) {
inode->i_op = &ufs_file_inode_operations;
} else if (S_ISDIR(inode->i_mode)) {
inode->i_op = &ufs_dir_inode_operations;
} else if (S_ISLNK(inode->i_mode)) {
inode->i_op = &ufs_symlink_inode_operations;
} else if (S_ISCHR(inode->i_mode)) {
inode->i_op = &chrdev_inode_operations;
} else if (S_ISBLK(inode->i_mode)) {
inode->i_op = &blkdev_inode_operations;
} else if (S_ISFIFO(inode->i_mode)) {
init_fifo(inode);
} else {
printk("ufs_read_inode: unknown file type 0%o ino %lu dev %d/%d\n",
inode->i_mode, inode->i_ino, MAJOR(inode->i_dev),
MINOR(inode->i_dev));
/* XXX - debugging */
ufs_print_inode(inode);
inode->i_op = &ufs_file_inode_operations;
}
/*
* ufs_read_super makes sure that UFS_NDADDR and UFS_NINDIR are sane.
*/
if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
S_ISLNK(inode->i_mode)) {
int i;
for (i = 0; i < UFS_NDADDR; i++) {
inode->u.ufs_i.ui_db[i] = ufsip->ui_db[i];
}
for (i = 0; i < UFS_NINDIR; i++) {
inode->u.ufs_i.ui_ib[i] = ufsip->ui_ib[i];
}
}
if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
/* XXX - should be ui_db[1] on little endian ufs filesystems */
inode->i_rdev = to_kdev_t(ufsip->ui_db[0]);
}
/* XXX - implement fast and slow symlinks */
inode->u.ufs_i.ui_flags = ufsip->ui_flags;
inode->u.ufs_i.ui_gen = ufsip->ui_gen; /* XXX - is this i_version? */
inode->u.ufs_i.ui_shadow = ufsip->ui_shadow; /* XXX */
inode->u.ufs_i.ui_uid = ufsip->ui_uid;
inode->u.ufs_i.ui_gid = ufsip->ui_gid;
inode->u.ufs_i.ui_oeftflag = ufsip->ui_oeftflag;
brelse(bh);
if (inode->i_sb->u.ufs_sb.s_flags & (UFS_DEBUG|UFS_DEBUG_INODE)) {
ufs_print_inode(inode);
}
return;
}
void ufs_put_inode (struct inode * inode)
{
if (inode->i_nlink)
return;
printk("ufs_put_inode: nlink == 0 for inum %lu on dev %d/%d\n",
inode->i_ino, MAJOR(inode->i_dev), MINOR(inode->i_dev));
ufs_print_inode(inode);
panic("ufs_put_inode: fs is read only, and nlink == 0");
/* XXX - this code goes here eventually
inode->i_size = 0;
if (inode->i_blocks)
ufs_truncate(inode);
ufs_free_inode(inode);
*/
return;
}
/*
* Local Variables: ***
* c-indent-level: 8 ***
* c-continued-statement-offset: 8 ***
* c-brace-offset: -8 ***
* c-argdecl-indent: 0 ***
* c-label-offset: -8 ***
* End: ***
*/
