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[/] [or1k/] [tags/] [before_ORP/] [uclinux/] [uClinux-2.0.x/] [fs/] [affs/] [namei.c] - Blame information for rev 1765

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/*
 *  linux/fs/affs/namei.c
 *
 *  (c) 1996  Hans-Joachim Widmaier - Rewritten
 *
 *  (C) 1993  Ray Burr - Modified for Amiga FFS filesystem.
 *
 *  (C) 1991  Linus Torvalds - minix filesystem
 */
 
#include <linux/sched.h>
#include <linux/affs_fs.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/stat.h>
#include <linux/fcntl.h>
#include <linux/locks.h>
#include <linux/amigaffs.h>
#include <asm/segment.h>
 
#include <linux/errno.h>
 
/* Simple toupper() for DOS\1 */
 
static inline unsigned int
affs_toupper(unsigned int ch)
{
        return ch >= 'a' && ch <= 'z' ? ch -= ('a' - 'A') : ch;
}
 
/* International toupper() for DOS\3 */
 
static inline unsigned int
affs_intl_toupper(unsigned int ch)
{
        return (ch >= 'a' && ch <= 'z') || (ch >= 0xE0
                && ch <= 0xFE && ch != 0xF7) ?
                ch - ('a' - 'A') : ch;
}
 
/*
 * NOTE! unlike strncmp, affs_match returns 1 for success, 0 for failure.
 */
 
static int
affs_match(const char *name, int len, const char *compare, int dlen, int intl)
{
        if (!compare)
                return 0;
 
        if (len > 30)
                len = 30;
        if (dlen > 30)
                dlen = 30;
 
        /* "" means "." ---> so paths like "/usr/lib//libc.a" work */
        if (!len && dlen == 1 && compare[0] == '.')
                return 1;
        if (dlen != len)
                return 0;
        if (intl) {
                while (dlen--) {
                        if (affs_intl_toupper(*name & 0xFF) != affs_intl_toupper(*compare & 0xFF))
                                return 0;
                        name++;
                        compare++;
                }
        } else {
                while (dlen--) {
                        if (affs_toupper(*name & 0xFF) != affs_toupper(*compare & 0xFF))
                                return 0;
                        name++;
                        compare++;
                }
        }
        return 1;
}
 
int
affs_hash_name(const char *name, int len, int intl, int hashsize)
{
        unsigned int i, x;
 
        if (len > 30)
                len = 30;
 
        x = len;
        for (i = 0; i < len; i++)
                if (intl)
                        x = (x * 13 + affs_intl_toupper(name[i] & 0xFF)) & 0x7ff;
                else
                        x = (x * 13 + affs_toupper(name[i] & 0xFF)) & 0x7ff;
 
        return x % hashsize;
}
 
static struct buffer_head *
affs_find_entry(struct inode *dir, const char *name, int namelen,
                unsigned long *ino)
{
        struct buffer_head *bh;
        int      intl;
        int      key;
 
        pr_debug("AFFS: find_entry(%.*s)=\n",namelen,name);
 
        intl = AFFS_I2FSTYPE(dir);
        bh   = affs_bread(dir->i_dev,dir->i_ino,AFFS_I2BSIZE(dir));
        if (!bh)
                return NULL;
 
        if (affs_match(name,namelen,".",1,intl)) {
                *ino = dir->i_ino;
                return bh;
        }
        if (affs_match(name,namelen,"..",2,intl)) {
                *ino = affs_parent_ino(dir);
                return bh;
        }
 
        key = AFFS_GET_HASHENTRY(bh->b_data,affs_hash_name(name,namelen,intl,AFFS_I2HSIZE(dir)));
 
        for (;;) {
                char *cname;
                int cnamelen;
 
                affs_brelse(bh);
                if (key == 0) {
                        bh = NULL;
                        break;
                }
                bh = affs_bread(dir->i_dev,key,AFFS_I2BSIZE(dir));
                if (!bh)
                        break;
                cnamelen = affs_get_file_name(AFFS_I2BSIZE(dir),bh->b_data,&cname);
                if (affs_match(name,namelen,cname,cnamelen,intl))
                        break;
                key = htonl(FILE_END(bh->b_data,dir)->hash_chain);
        }
        *ino = key;
        return bh;
}
 
int
affs_lookup(struct inode *dir, const char *name, int len, struct inode **result)
{
        int res;
        unsigned long ino;
        struct buffer_head *bh;
 
        pr_debug("AFFS: lookup(%.*s)\n",len,name);
 
        *result = NULL;
        if (!dir)
                return -ENOENT;
 
        res = -ENOENT;
        if (S_ISDIR(dir->i_mode)) {
                if ((bh = affs_find_entry(dir,name,len,&ino))) {
                        if (FILE_END(bh->b_data,dir)->original)
                                ino = htonl(FILE_END(bh->b_data,dir)->original);
                        affs_brelse(bh);
                        if ((*result = iget(dir->i_sb,ino)))
                                res = 0;
                        else
                                res = -EACCES;
                }
        }
        iput(dir);
        return res;
}
 
int
affs_unlink(struct inode *dir, const char *name, int len)
{
        int                      retval;
        struct buffer_head      *bh;
        unsigned long            ino;
        struct inode            *inode;
 
        pr_debug("AFFS: unlink(dir=%ld,\"%.*s\")\n",dir->i_ino,len,name);
 
        bh      = NULL;
        inode   = NULL;
        retval  = -ENOENT;
        if (!(bh = affs_find_entry(dir,name,len,&ino))) {
                goto unlink_done;
        }
        if (!(inode = iget(dir->i_sb,ino))) {
                goto unlink_done;
        }
        if (S_ISDIR(inode->i_mode)) {
                retval = -EPERM;
                goto unlink_done;
        }
 
        if ((retval = affs_fix_hash_pred(dir,affs_hash_name(name,len,AFFS_I2FSTYPE(dir),
                                         AFFS_I2HSIZE(dir)) + 6,ino,
                                         FILE_END(bh->b_data,dir)->hash_chain)))
                goto unlink_done;
 
        if ((retval = affs_fixup(bh,inode)))
                goto unlink_done;
 
        inode->i_nlink=0;
        inode->i_dirt=1;
        inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME;
        dir->i_version = ++event;
        dir->i_dirt=1;
unlink_done:
        affs_brelse(bh);
        iput(inode);
        iput(dir);
        return retval;
}
 
int
affs_create(struct inode *dir, const char *name, int len, int mode, struct inode **result)
{
        struct inode    *inode;
        int              error;
 
        pr_debug("AFFS: create(%lu,\"%.*s\",0%o)\n",dir->i_ino,len,name,mode);
 
 
        *result = NULL;
 
        if (!dir || !dir->i_sb) {
                iput(dir);
                return -EINVAL;
        }
        inode = affs_new_inode(dir);
        if (!inode) {
                iput (dir);
                return -ENOSPC;
        }
        inode->i_mode = mode;
        if (dir->i_sb->u.affs_sb.s_flags & SF_OFS)
                inode->i_op = &affs_file_inode_operations_ofs;
        else
                inode->i_op = &affs_file_inode_operations;
 
        error = affs_add_entry(dir,NULL,inode,name,len,ST_FILE);
        if (error) {
                iput(dir);
                inode->i_nlink = 0;
                inode->i_dirt  = 1;
                iput(inode);
                return -ENOSPC;
        }
        inode->u.affs_i.i_protect = mode_to_prot(inode->i_mode);
 
        iput(dir);
        *result = inode;
 
        return 0;
}
 
int
affs_mkdir(struct inode *dir, const char *name, int len, int mode)
{
        struct inode            *inode;
        struct buffer_head      *bh;
        unsigned long            i;
        int                      error;
 
        pr_debug("AFFS: mkdir(%lu,\"%.*s\",0%o)\n",dir->i_ino,len,name,mode);
 
        if (!dir || !dir->i_sb) {
                iput(dir);
                return -EINVAL;
        }
        bh = affs_find_entry(dir,name,len,&i);
        if (bh) {
                affs_brelse(bh);
                iput(dir);
                return -EEXIST;
        }
        inode = affs_new_inode(dir);
        if (!inode) {
                iput (dir);
                return -ENOSPC;
        }
        inode->i_op = &affs_dir_inode_operations;
        error       = affs_add_entry(dir,NULL,inode,name,len,ST_USERDIR);
        if (error) {
                iput(dir);
                inode->i_nlink = 0;
                inode->i_dirt  = 1;
                iput(inode);
                return error;
        }
        inode->i_mode = S_IFDIR | (mode & 0777 & ~current->fs->umask);
        inode->u.affs_i.i_protect = mode_to_prot(inode->i_mode);
 
        iput(dir);
        iput(inode);
 
        return 0;
}
 
static int
empty_dir(struct buffer_head *bh, int hashsize)
{
        while (--hashsize >= 0) {
                if (((struct dir_front *)bh->b_data)->hashtable[hashsize])
                        return 0;
        }
        return 1;
}
 
int
affs_rmdir(struct inode *dir, const char *name, int len)
{
        int                      retval;
        unsigned long            ino;
        struct inode            *inode;
        struct buffer_head      *bh;
 
        pr_debug("AFFS: rmdir(dir=%lu,\"%.*s\")\n",dir->i_ino,len,name);
 
        inode  = NULL;
        retval = -ENOENT;
        if (!(bh = affs_find_entry(dir,name,len,&ino))) {
                goto rmdir_done;
        }
        if (!(inode = iget(dir->i_sb,ino))) {
                goto rmdir_done;
        }
        retval = -EPERM;
        if (!fsuser() && current->fsuid != inode->i_uid &&
            current->fsuid != dir->i_uid)
                goto rmdir_done;
        if (inode->i_dev != dir->i_dev)
                goto rmdir_done;
        if (inode == dir)       /* we may not delete ".", but "../dir" is ok */
                goto rmdir_done;
        if (!S_ISDIR(inode->i_mode)) {
                retval = -ENOTDIR;
                goto rmdir_done;
        }
        if (!empty_dir(bh,AFFS_I2HSIZE(inode))) {
                retval = -ENOTEMPTY;
                goto rmdir_done;
        }
        if (inode->i_count > 1) {
                retval = -EBUSY;
                goto rmdir_done;
        }
        if ((retval = affs_fix_hash_pred(dir,affs_hash_name(name,len,AFFS_I2FSTYPE(dir),
                                         AFFS_I2HSIZE(dir)) + 6,ino,
                                         FILE_END(bh->b_data,dir)->hash_chain)))
                goto rmdir_done;
 
        if ((retval = affs_fixup(bh,inode)))
                goto rmdir_done;
 
        inode->i_nlink=0;
        inode->i_dirt=1;
        inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME;
        dir->i_version = ++event;
        dir->i_dirt=1;
rmdir_done:
        iput(dir);
        iput(inode);
        affs_brelse(bh);
        return retval;
}
 
int
affs_symlink(struct inode *dir, const char *name, int len, const char *symname)
{
        struct buffer_head      *bh;
        struct inode            *inode;
        char                    *p;
        unsigned long            tmp;
        int                      i, maxlen;
        char                     c, lc;
 
        pr_debug("AFFS: symlink(%lu,\"%.*s\" -> \"%s\")\n",dir->i_ino,len,name,symname);
 
        maxlen = 4 * AFFS_I2HSIZE(dir) - 1;
        inode  = affs_new_inode(dir);
        if (!inode) {
                iput(dir);
                return -ENOSPC;
        }
        inode->i_op   = &affs_symlink_inode_operations;
        inode->i_mode = S_IFLNK | 0777;
        inode->u.affs_i.i_protect = mode_to_prot(inode->i_mode);
        bh = affs_bread(inode->i_dev,inode->i_ino,AFFS_I2BSIZE(inode));
        if (!bh) {
                iput(dir);
                inode->i_nlink = 0;
                inode->i_dirt  = 1;
                iput(inode);
                return -EIO;
        }
        i  = 0;
        p  = ((struct slink_front *)bh->b_data)->symname;
        lc = '/';
        if (*symname == '/') {
                while (*symname == '/')
                        symname++;
                while (inode->i_sb->u.affs_sb.s_volume[i])      /* Cannot overflow */
                        *p++ = inode->i_sb->u.affs_sb.s_volume[i++];
        }
        while (i < maxlen && (c = *symname++)) {
                if (c == '.' && lc == '/' && *symname == '.' && symname[1] == '/') {
                        *p++ = '/';
                        i++;
                        symname += 2;
                        lc = '/';
                } else if (c == '.' && lc == '/' && *symname == '/') {
                        symname++;
                        lc = '/';
                } else {
                        *p++ = c;
                        lc   = c;
                        i++;
                }
                if (lc == '/')
                        while (*symname == '/')
                                symname++;
        }
        *p = 0;
        mark_buffer_dirty(bh,1);
        affs_brelse(bh);
        inode->i_dirt = 1;
        bh = affs_find_entry(dir,name,len,&tmp);
        if (bh) {
                inode->i_nlink = 0;
                iput(inode);
                affs_brelse(bh);
                iput(dir);
                return -EEXIST;
        }
        i = affs_add_entry(dir,NULL,inode,name,len,ST_SOFTLINK);
        if (i) {
                inode->i_nlink = 0;
                inode->i_dirt  = 1;
                iput(inode);
                affs_brelse(bh);
                iput(dir);
                return i;
        }
        iput(dir);
        iput(inode);
 
        return 0;
}
 
int
affs_link(struct inode *oldinode, struct inode *dir, const char *name, int len)
{
        struct inode            *inode;
        struct buffer_head      *bh;
        unsigned long            i;
        int                      error;
 
        pr_debug("AFFS: link(%lu,%lu,\"%.*s\")\n",oldinode->i_ino,dir->i_ino,len,name);
 
        bh = affs_find_entry(dir,name,len,&i);
        if (bh) {
                affs_brelse(bh);
                iput(oldinode);
                iput(dir);
                return -EEXIST;
        }
        if (oldinode->u.affs_i.i_hlink) {
                i = oldinode->u.affs_i.i_original;
                iput(oldinode);
                oldinode = iget(dir->i_sb,i);
                if (!oldinode) {
                        printk("AFFS: link(): original does not exist.\n");
                        iput(dir);
                        return -ENOENT;
                }
        }
        inode = affs_new_inode(dir);
        if (!inode) {
                iput(oldinode);
                iput(dir);
                return -ENOSPC;
        }
        inode->i_op                = oldinode->i_op;
        inode->i_mode              = oldinode->i_mode;
        inode->i_uid               = oldinode->i_uid;
        inode->i_gid               = oldinode->i_gid;
        inode->u.affs_i.i_protect  = mode_to_prot(inode->i_mode);
        inode->u.affs_i.i_original = oldinode->i_ino;
        inode->u.affs_i.i_hlink    = 1;
 
        if (S_ISDIR(oldinode->i_mode))
                error = affs_add_entry(dir,oldinode,inode,name,len,ST_LINKDIR);
        else
                error = affs_add_entry(dir,oldinode,inode,name,len,ST_LINKFILE);
        if (error) {
                inode->i_nlink = 0;
                inode->i_dirt  = 1;
        }
        iput(dir);
        iput(inode);
        iput(oldinode);
 
        return error;
}
 
static int
subdir(struct inode * new_inode, struct inode * old_inode)
{
    int ino;
    int result;
 
    new_inode->i_count++;
    result = 0;
    for (;;) {
        if (new_inode == old_inode) {
            result = 1;
            break;
        }
        if (new_inode->i_dev != old_inode->i_dev)
            break;
        ino = new_inode->i_ino;
        if (affs_lookup(new_inode,"..",2,&new_inode))
            break;
        if (new_inode->i_ino == ino)
            break;
    }
    iput(new_inode);
    return result;
}
 
/* I'm afraid this might not be race proof. Maybe next time. */
 
int
affs_rename(struct inode *old_dir, const char *old_name, int old_len,
            struct inode *new_dir, const char *new_name, int new_len,
            int must_be_dir)
{
        struct inode            *old_inode;
        struct inode            *new_inode;
        struct buffer_head      *old_bh;
        struct buffer_head      *new_bh;
        unsigned long            old_ino;
        unsigned long            new_ino;
        int                      retval;
 
        pr_debug("AFFS: rename(old=%lu,\"%*s\" to new=%lu,\"%*s\")\n",old_dir->i_ino,old_len,old_name,
                 new_dir->i_ino,new_len,new_name);
 
        if (new_len > 30)
                new_len = 30;
        goto start_up;
retry:
        affs_brelse(old_bh);
        affs_brelse(new_bh);
        iput(new_inode);
        iput(old_inode);
        current->counter = 0;
        schedule();
start_up:
        old_inode = new_inode = NULL;
        old_bh    = new_bh = NULL;
        retval    = -ENOENT;
 
        old_bh = affs_find_entry(old_dir,old_name,old_len,&old_ino);
        if (!old_bh)
                goto end_rename;
        old_inode = __iget(old_dir->i_sb,old_ino,0);
        if (!old_inode)
                goto end_rename;
        if (must_be_dir && !S_ISDIR(old_inode->i_mode))
                goto end_rename;
        new_bh = affs_find_entry(new_dir,new_name,new_len,&new_ino);
        if (new_bh) {
                new_inode = __iget(new_dir->i_sb,new_ino,0);
                if (!new_inode) {               /* What does this mean? */
                        affs_brelse(new_bh);
                        new_bh = NULL;
                }
        }
        if (new_inode == old_inode) {           /* Won't happen */
                retval = 0;
                goto end_rename;
        }
        if (new_inode && S_ISDIR(new_inode->i_mode)) {
                retval = -EISDIR;
                if (!S_ISDIR(old_inode->i_mode))
                        goto end_rename;
                retval = -EINVAL;
                if (subdir(new_dir,old_inode))
                        goto end_rename;
                retval = -ENOTEMPTY;
                if (!empty_dir(new_bh,AFFS_I2HSIZE(new_inode)))
                        goto end_rename;
                retval = -EBUSY;
                if (new_inode->i_count > 1)
                        goto end_rename;
        }
        if (S_ISDIR(old_inode->i_mode)) {
                retval = -ENOTDIR;
                if (new_inode && !S_ISDIR(new_inode->i_mode))
                        goto end_rename;
                retval = -EINVAL;
                if (subdir(new_dir,old_inode))
                        goto end_rename;
                if (affs_parent_ino(old_inode) != old_dir->i_ino)
                        goto end_rename;
        }
        /* Unlink destination if existent */
        if (new_inode) {
                if ((retval = affs_fix_hash_pred(new_dir,affs_hash_name(new_name,new_len,
                                                 AFFS_I2FSTYPE(new_dir),AFFS_I2HSIZE(new_dir)) + 6,
                                                 new_ino,
                                                 FILE_END(new_bh->b_data,new_dir)->hash_chain)))
                        goto retry;
                if ((retval = affs_fixup(new_bh,new_inode)))
                        goto retry;
                mark_buffer_dirty(new_bh,1);
                new_dir->i_version = ++event;
                new_dir->i_dirt    = 1;
                new_inode->i_nlink = 0;
                new_inode->i_dirt  = 1;
        }
        retval = affs_fix_hash_pred(old_dir,affs_hash_name(old_name,old_len,AFFS_I2FSTYPE(old_dir),
                                    AFFS_I2HSIZE(old_dir)) + 6,old_ino,
                                    FILE_END(old_bh->b_data,old_dir)->hash_chain);
        if (retval)
                goto retry;
 
        retval = affs_add_entry(new_dir,NULL,old_inode,new_name,new_len,
                                htonl(FILE_END(old_bh->b_data,old_dir)->secondary_type));
 
        new_dir->i_ctime   = new_dir->i_mtime = old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
        new_dir->i_version = ++event;
        old_dir->i_version = ++event;
        new_dir->i_dirt    = 1;
        old_dir->i_dirt    = 1;
        mark_buffer_dirty(old_bh,1);
 
end_rename:
        affs_brelse(old_bh);
        affs_brelse(new_bh);
        iput(new_inode);
        iput(old_inode);
        iput(old_dir);
        iput(new_dir);
 
        return retval;
}
 
int
affs_fixup(struct buffer_head *bh, struct inode *inode)
{
        int                      key, link_key;
        int                      type;
        struct buffer_head      *nbh;
        struct inode            *ofinode;
 
        type = htonl(FILE_END(bh->b_data,inode)->secondary_type);
        if (type == ST_LINKFILE || type == ST_LINKDIR) {
                key = htonl(LINK_END(bh->b_data,inode)->original);
                LINK_END(bh->b_data,inode)->original = 0;
                if (!key) {
                        printk("AFFS: fixup(): hard link without original: ino=%lu\n",inode->i_ino);
                        return -ENOENT;
                }
                if (!(ofinode = iget(inode->i_sb,key)))
                        return -ENOENT;
                type = affs_fix_link_pred(ofinode,inode->i_ino,
                                          FILE_END(bh->b_data,inode)->link_chain);
                iput(ofinode);
                return type;
        } else if (type == ST_FILE || type == ST_USERDIR) {
                if ((key = htonl(FILE_END(bh->b_data,inode)->link_chain))) {
                        /* Get first link, turn it to a file */
                        if (!(ofinode = iget(inode->i_sb,key))) {
                                printk("AFFS: fixup(): cannot read inode %u\n",key);
                                return -ENOENT;
                        }
                        if (!ofinode->u.affs_i.i_hlink) {
                                printk("AFFS: fixup(): first link to %lu (%u) is not a link?\n",
                                        inode->i_ino,key);
                                iput(ofinode);
                                return -ENOENT;
                        }
                        if (!(nbh = affs_bread(inode->i_dev,key,AFFS_I2BSIZE(inode)))) {
                                printk("AFFS: fixup(): cannot read block %u\n",key);
                                iput(ofinode);
                                return -ENOENT;
                        }
                        lock_super(inode->i_sb);
                        memcpy(nbh->b_data + 8,bh->b_data + 8,AFFS_I2BSIZE(inode) - 208);
                        FILE_END(nbh->b_data,inode)->byte_size = FILE_END(bh->b_data,inode)->
                                                                          byte_size;
                        FILE_END(nbh->b_data,inode)->extension = FILE_END(bh->b_data,inode)->
                                                                          extension;
                        FILE_END(nbh->b_data,inode)->secondary_type = FILE_END(bh->b_data,inode)->
                                                                          secondary_type;
                        FILE_END(nbh->b_data,inode)->original = 0;
 
                        ofinode->u.affs_i.i_original = 0;
                        ofinode->u.affs_i.i_hlink    = 0;
                        ofinode->i_size              = inode->i_size;
                        ofinode->i_uid               = inode->i_uid;
                        ofinode->i_gid               = inode->i_gid;
                        ofinode->i_dirt              = 1;
                        link_key                     = ofinode->i_ino;
 
                        /* Let all remaining links point to the new file */
                        while (1) {
                                affs_fix_checksum(AFFS_I2BSIZE(inode),nbh->b_data,5);
                                mark_buffer_dirty(nbh,1);
                                key = htonl(FILE_END(nbh->b_data,inode)->link_chain);
                                affs_brelse(nbh);
                                iput(ofinode);
                                if (!key || !(nbh = affs_bread(inode->i_dev,key,AFFS_I2BSIZE(inode))))
                                        break;
                                if ((ofinode = iget(inode->i_sb,key))) {
                                        if (!ofinode->u.affs_i.i_hlink)
                                                printk("AFFS: fixup() inode %u in link chain is "
                                                       "not a link\n",key);
                                        ofinode->u.affs_i.i_original = link_key;
                                        ofinode->i_dirt              = 1;
                                        FILE_END(nbh->b_data,inode)->original = htonl(link_key);
                                } else
                                        printk("AFFS: fixup(): cannot get inode %u\n",key);
                        }
                        /* Turn old inode to a link */
                        inode->u.affs_i.i_hlink = 1;
                        unlock_super(inode->i_sb);
                }
                return 0;
        } else if (type == ST_SOFTLINK) {
                return 0;
        } else {
                printk("AFFS: fixup(): secondary type=%d\n",type);
                return -EBADF;
        }
}

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[/] [or1k/] [tags/] [before_ORP/] [uclinux/] [uClinux-2.0.x/] [fs/] [affs/] [namei.c] - Blame information for rev 1765

Line No.	Rev	Author	Line
1	199	simons	`/*`
2			`* linux/fs/affs/namei.c`
3			`*`
4			`* (c) 1996 Hans-Joachim Widmaier - Rewritten`
5			`*`
6			`* (C) 1993 Ray Burr - Modified for Amiga FFS filesystem.`
7			`*`
8			`* (C) 1991 Linus Torvalds - minix filesystem`
9			`*/`
10
11			`#include <linux/sched.h>`
12			`#include <linux/affs_fs.h>`
13			`#include <linux/kernel.h>`
14			`#include <linux/string.h>`
15			`#include <linux/stat.h>`
16			`#include <linux/fcntl.h>`
17			`#include <linux/locks.h>`
18			`#include <linux/amigaffs.h>`
19			`#include <asm/segment.h>`
20
21			`#include <linux/errno.h>`
22
23			`/* Simple toupper() for DOS\1 */`
24
25			`static inline unsigned int`
26			`affs_toupper(unsigned int ch)`
27			`{`
28			`return ch >= 'a' && ch <= 'z' ? ch -= ('a' - 'A') : ch;`
29			`}`
30
31			`/* International toupper() for DOS\3 */`
32
33			`static inline unsigned int`
34			`affs_intl_toupper(unsigned int ch)`
35			`{`
36			`return (ch >= 'a' && ch <= 'z') \|\| (ch >= 0xE0`
37			`&& ch <= 0xFE && ch != 0xF7) ?`
38			`ch - ('a' - 'A') : ch;`
39			`}`
40
41			`/*`
42			`* NOTE! unlike strncmp, affs_match returns 1 for success, 0 for failure.`
43			`*/`
44
45			`static int`
46			`affs_match(const char name, int len, const char compare, int dlen, int intl)`
47			`{`
48			`if (!compare)`
49			`return 0;`
50
51			`if (len > 30)`
52			`len = 30;`
53			`if (dlen > 30)`
54			`dlen = 30;`
55
56			`/* "" means "." ---> so paths like "/usr/lib//libc.a" work */`
57			`if (!len && dlen == 1 && compare[0] == '.')`
58			`return 1;`
59			`if (dlen != len)`
60			`return 0;`
61			`if (intl) {`
62			`while (dlen--) {`
63			`if (affs_intl_toupper(name & 0xFF) != affs_intl_toupper(compare & 0xFF))`
64			`return 0;`
65			`name++;`
66			`compare++;`
67			`}`
68			`} else {`
69			`while (dlen--) {`
70			`if (affs_toupper(name & 0xFF) != affs_toupper(compare & 0xFF))`
71			`return 0;`
72			`name++;`
73			`compare++;`
74			`}`
75			`}`
76			`return 1;`
77			`}`
78
79			`int`
80			`affs_hash_name(const char *name, int len, int intl, int hashsize)`
81			`{`
82			`unsigned int i, x;`
83
84			`if (len > 30)`
85			`len = 30;`
86
87			`x = len;`
88			`for (i = 0; i < len; i++)`
89			`if (intl)`
90			`x = (x * 13 + affs_intl_toupper(name[i] & 0xFF)) & 0x7ff;`
91			`else`
92			`x = (x * 13 + affs_toupper(name[i] & 0xFF)) & 0x7ff;`
93
94			`return x % hashsize;`
95			`}`
96
97			`static struct buffer_head *`
98			`affs_find_entry(struct inode dir, const char name, int namelen,`
99			`unsigned long *ino)`
100			`{`
101			`struct buffer_head *bh;`
102			`int intl;`
103			`int key;`
104
105			`pr_debug("AFFS: find_entry(%.*s)=\n",namelen,name);`
106
107			`intl = AFFS_I2FSTYPE(dir);`
108			`bh = affs_bread(dir->i_dev,dir->i_ino,AFFS_I2BSIZE(dir));`
109			`if (!bh)`
110			`return NULL;`
111
112			`if (affs_match(name,namelen,".",1,intl)) {`
113			`*ino = dir->i_ino;`
114			`return bh;`
115			`}`
116			`if (affs_match(name,namelen,"..",2,intl)) {`
117			`*ino = affs_parent_ino(dir);`
118			`return bh;`
119			`}`
120
121			`key = AFFS_GET_HASHENTRY(bh->b_data,affs_hash_name(name,namelen,intl,AFFS_I2HSIZE(dir)));`
122
123			`for (;;) {`
124			`char *cname;`
125			`int cnamelen;`
126
127			`affs_brelse(bh);`
128			`if (key == 0) {`
129			`bh = NULL;`
130			`break;`
131			`}`
132			`bh = affs_bread(dir->i_dev,key,AFFS_I2BSIZE(dir));`
133			`if (!bh)`
134			`break;`
135			`cnamelen = affs_get_file_name(AFFS_I2BSIZE(dir),bh->b_data,&cname);`
136			`if (affs_match(name,namelen,cname,cnamelen,intl))`
137			`break;`
138			`key = htonl(FILE_END(bh->b_data,dir)->hash_chain);`
139			`}`
140			`*ino = key;`
141			`return bh;`
142			`}`
143
144			`int`
145			`affs_lookup(struct inode dir, const char name, int len, struct inode **result)`
146			`{`
147			`int res;`
148			`unsigned long ino;`
149			`struct buffer_head *bh;`
150
151			`pr_debug("AFFS: lookup(%.*s)\n",len,name);`
152
153			`*result = NULL;`
154			`if (!dir)`
155			`return -ENOENT;`
156
157			`res = -ENOENT;`
158			`if (S_ISDIR(dir->i_mode)) {`
159			`if ((bh = affs_find_entry(dir,name,len,&ino))) {`
160			`if (FILE_END(bh->b_data,dir)->original)`
161			`ino = htonl(FILE_END(bh->b_data,dir)->original);`
162			`affs_brelse(bh);`
163			`if ((*result = iget(dir->i_sb,ino)))`
164			`res = 0;`
165			`else`
166			`res = -EACCES;`
167			`}`
168			`}`
169			`iput(dir);`
170			`return res;`
171			`}`
172
173			`int`
174			`affs_unlink(struct inode dir, const char name, int len)`
175			`{`
176			`int retval;`
177			`struct buffer_head *bh;`
178			`unsigned long ino;`
179			`struct inode *inode;`
180
181			`pr_debug("AFFS: unlink(dir=%ld,\"%.*s\")\n",dir->i_ino,len,name);`
182
183			`bh = NULL;`
184			`inode = NULL;`
185			`retval = -ENOENT;`
186			`if (!(bh = affs_find_entry(dir,name,len,&ino))) {`
187			`goto unlink_done;`
188			`}`
189			`if (!(inode = iget(dir->i_sb,ino))) {`
190			`goto unlink_done;`
191			`}`
192			`if (S_ISDIR(inode->i_mode)) {`
193			`retval = -EPERM;`
194			`goto unlink_done;`
195			`}`
196
197			`if ((retval = affs_fix_hash_pred(dir,affs_hash_name(name,len,AFFS_I2FSTYPE(dir),`
198			`AFFS_I2HSIZE(dir)) + 6,ino,`
199			`FILE_END(bh->b_data,dir)->hash_chain)))`
200			`goto unlink_done;`
201
202			`if ((retval = affs_fixup(bh,inode)))`
203			`goto unlink_done;`
204
205			`inode->i_nlink=0;`
206			`inode->i_dirt=1;`
207			`inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME;`
208			`dir->i_version = ++event;`
209			`dir->i_dirt=1;`
210			`unlink_done:`
211			`affs_brelse(bh);`
212			`iput(inode);`
213			`iput(dir);`
214			`return retval;`
215			`}`
216
217			`int`
218			`affs_create(struct inode dir, const char name, int len, int mode, struct inode **result)`
219			`{`
220			`struct inode *inode;`
221			`int error;`
222
223			`pr_debug("AFFS: create(%lu,\"%.*s\",0%o)\n",dir->i_ino,len,name,mode);`
224
225
226			`*result = NULL;`
227
228			`if (!dir \|\| !dir->i_sb) {`
229			`iput(dir);`
230			`return -EINVAL;`
231			`}`
232			`inode = affs_new_inode(dir);`
233			`if (!inode) {`
234			`iput (dir);`
235			`return -ENOSPC;`
236			`}`
237			`inode->i_mode = mode;`
238			`if (dir->i_sb->u.affs_sb.s_flags & SF_OFS)`
239			`inode->i_op = &affs_file_inode_operations_ofs;`
240			`else`
241			`inode->i_op = &affs_file_inode_operations;`
242
243			`error = affs_add_entry(dir,NULL,inode,name,len,ST_FILE);`
244			`if (error) {`
245			`iput(dir);`
246			`inode->i_nlink = 0;`
247			`inode->i_dirt = 1;`
248			`iput(inode);`
249			`return -ENOSPC;`
250			`}`
251			`inode->u.affs_i.i_protect = mode_to_prot(inode->i_mode);`
252
253			`iput(dir);`
254			`*result = inode;`
255
256			`return 0;`
257			`}`
258
259			`int`
260			`affs_mkdir(struct inode dir, const char name, int len, int mode)`
261			`{`
262			`struct inode *inode;`
263			`struct buffer_head *bh;`
264			`unsigned long i;`
265			`int error;`
266
267			`pr_debug("AFFS: mkdir(%lu,\"%.*s\",0%o)\n",dir->i_ino,len,name,mode);`
268
269			`if (!dir \|\| !dir->i_sb) {`
270			`iput(dir);`
271			`return -EINVAL;`
272			`}`
273			`bh = affs_find_entry(dir,name,len,&i);`
274			`if (bh) {`
275			`affs_brelse(bh);`
276			`iput(dir);`
277			`return -EEXIST;`
278			`}`
279			`inode = affs_new_inode(dir);`
280			`if (!inode) {`
281			`iput (dir);`
282			`return -ENOSPC;`
283			`}`
284			`inode->i_op = &affs_dir_inode_operations;`
285			`error = affs_add_entry(dir,NULL,inode,name,len,ST_USERDIR);`
286			`if (error) {`
287			`iput(dir);`
288			`inode->i_nlink = 0;`
289			`inode->i_dirt = 1;`
290			`iput(inode);`
291			`return error;`
292			`}`
293			`inode->i_mode = S_IFDIR \| (mode & 0777 & ~current->fs->umask);`
294			`inode->u.affs_i.i_protect = mode_to_prot(inode->i_mode);`
295
296			`iput(dir);`
297			`iput(inode);`
298
299			`return 0;`
300			`}`
301
302			`static int`
303			`empty_dir(struct buffer_head *bh, int hashsize)`
304			`{`
305			`while (--hashsize >= 0) {`
306			`if (((struct dir_front *)bh->b_data)->hashtable[hashsize])`
307			`return 0;`
308			`}`
309			`return 1;`
310			`}`
311
312			`int`
313			`affs_rmdir(struct inode dir, const char name, int len)`
314			`{`
315			`int retval;`
316			`unsigned long ino;`
317			`struct inode *inode;`
318			`struct buffer_head *bh;`
319
320			`pr_debug("AFFS: rmdir(dir=%lu,\"%.*s\")\n",dir->i_ino,len,name);`
321
322			`inode = NULL;`
323			`retval = -ENOENT;`
324			`if (!(bh = affs_find_entry(dir,name,len,&ino))) {`
325			`goto rmdir_done;`
326			`}`
327			`if (!(inode = iget(dir->i_sb,ino))) {`
328			`goto rmdir_done;`
329			`}`
330			`retval = -EPERM;`
331			`if (!fsuser() && current->fsuid != inode->i_uid &&`
332			`current->fsuid != dir->i_uid)`
333			`goto rmdir_done;`
334			`if (inode->i_dev != dir->i_dev)`
335			`goto rmdir_done;`
336			`if (inode == dir) /* we may not delete ".", but "../dir" is ok */`
337			`goto rmdir_done;`
338			`if (!S_ISDIR(inode->i_mode)) {`
339			`retval = -ENOTDIR;`
340			`goto rmdir_done;`
341			`}`
342			`if (!empty_dir(bh,AFFS_I2HSIZE(inode))) {`
343			`retval = -ENOTEMPTY;`
344			`goto rmdir_done;`
345			`}`
346			`if (inode->i_count > 1) {`
347			`retval = -EBUSY;`
348			`goto rmdir_done;`
349			`}`
350			`if ((retval = affs_fix_hash_pred(dir,affs_hash_name(name,len,AFFS_I2FSTYPE(dir),`
351			`AFFS_I2HSIZE(dir)) + 6,ino,`
352			`FILE_END(bh->b_data,dir)->hash_chain)))`
353			`goto rmdir_done;`
354
355			`if ((retval = affs_fixup(bh,inode)))`
356			`goto rmdir_done;`
357
358			`inode->i_nlink=0;`
359			`inode->i_dirt=1;`
360			`inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME;`
361			`dir->i_version = ++event;`
362			`dir->i_dirt=1;`
363			`rmdir_done:`
364			`iput(dir);`
365			`iput(inode);`
366			`affs_brelse(bh);`
367			`return retval;`
368			`}`
369
370			`int`
371			`affs_symlink(struct inode dir, const char name, int len, const char *symname)`
372			`{`
373			`struct buffer_head *bh;`
374			`struct inode *inode;`
375			`char *p;`
376			`unsigned long tmp;`
377			`int i, maxlen;`
378			`char c, lc;`
379
380			`pr_debug("AFFS: symlink(%lu,\"%.*s\" -> \"%s\")\n",dir->i_ino,len,name,symname);`
381
382			`maxlen = 4 * AFFS_I2HSIZE(dir) - 1;`
383			`inode = affs_new_inode(dir);`
384			`if (!inode) {`
385			`iput(dir);`
386			`return -ENOSPC;`
387			`}`
388			`inode->i_op = &affs_symlink_inode_operations;`
389			`inode->i_mode = S_IFLNK \| 0777;`
390			`inode->u.affs_i.i_protect = mode_to_prot(inode->i_mode);`
391			`bh = affs_bread(inode->i_dev,inode->i_ino,AFFS_I2BSIZE(inode));`
392			`if (!bh) {`
393			`iput(dir);`
394			`inode->i_nlink = 0;`
395			`inode->i_dirt = 1;`
396			`iput(inode);`
397			`return -EIO;`
398			`}`
399			`i = 0;`
400			`p = ((struct slink_front *)bh->b_data)->symname;`
401			`lc = '/';`
402			`if (*symname == '/') {`
403			`while (*symname == '/')`
404			`symname++;`
405			`while (inode->i_sb->u.affs_sb.s_volume[i]) /* Cannot overflow */`
406			`*p++ = inode->i_sb->u.affs_sb.s_volume[i++];`
407			`}`
408			`while (i < maxlen && (c = *symname++)) {`
409			`if (c == '.' && lc == '/' && *symname == '.' && symname[1] == '/') {`
410			`*p++ = '/';`
411			`i++;`
412			`symname += 2;`
413			`lc = '/';`
414			`} else if (c == '.' && lc == '/' && *symname == '/') {`
415			`symname++;`
416			`lc = '/';`
417			`} else {`
418			`*p++ = c;`
419			`lc = c;`
420			`i++;`
421			`}`
422			`if (lc == '/')`
423			`while (*symname == '/')`
424			`symname++;`
425			`}`
426			`*p = 0;`
427			`mark_buffer_dirty(bh,1);`
428			`affs_brelse(bh);`
429			`inode->i_dirt = 1;`
430			`bh = affs_find_entry(dir,name,len,&tmp);`
431			`if (bh) {`
432			`inode->i_nlink = 0;`
433			`iput(inode);`
434			`affs_brelse(bh);`
435			`iput(dir);`
436			`return -EEXIST;`
437			`}`
438			`i = affs_add_entry(dir,NULL,inode,name,len,ST_SOFTLINK);`
439			`if (i) {`
440			`inode->i_nlink = 0;`
441			`inode->i_dirt = 1;`
442			`iput(inode);`
443			`affs_brelse(bh);`
444			`iput(dir);`
445			`return i;`
446			`}`
447			`iput(dir);`
448			`iput(inode);`
449
450			`return 0;`
451			`}`
452
453			`int`
454			`affs_link(struct inode oldinode, struct inode dir, const char *name, int len)`
455			`{`
456			`struct inode *inode;`
457			`struct buffer_head *bh;`
458			`unsigned long i;`
459			`int error;`
460
461			`pr_debug("AFFS: link(%lu,%lu,\"%.*s\")\n",oldinode->i_ino,dir->i_ino,len,name);`
462
463			`bh = affs_find_entry(dir,name,len,&i);`
464			`if (bh) {`
465			`affs_brelse(bh);`
466			`iput(oldinode);`
467			`iput(dir);`
468			`return -EEXIST;`
469			`}`
470			`if (oldinode->u.affs_i.i_hlink) {`
471			`i = oldinode->u.affs_i.i_original;`
472			`iput(oldinode);`
473			`oldinode = iget(dir->i_sb,i);`
474			`if (!oldinode) {`
475			`printk("AFFS: link(): original does not exist.\n");`
476			`iput(dir);`
477			`return -ENOENT;`
478			`}`
479			`}`
480			`inode = affs_new_inode(dir);`
481			`if (!inode) {`
482			`iput(oldinode);`
483			`iput(dir);`
484			`return -ENOSPC;`
485			`}`
486			`inode->i_op = oldinode->i_op;`
487			`inode->i_mode = oldinode->i_mode;`
488			`inode->i_uid = oldinode->i_uid;`
489			`inode->i_gid = oldinode->i_gid;`
490			`inode->u.affs_i.i_protect = mode_to_prot(inode->i_mode);`
491			`inode->u.affs_i.i_original = oldinode->i_ino;`
492			`inode->u.affs_i.i_hlink = 1;`
493
494			`if (S_ISDIR(oldinode->i_mode))`
495			`error = affs_add_entry(dir,oldinode,inode,name,len,ST_LINKDIR);`
496			`else`
497			`error = affs_add_entry(dir,oldinode,inode,name,len,ST_LINKFILE);`
498			`if (error) {`
499			`inode->i_nlink = 0;`
500			`inode->i_dirt = 1;`
501			`}`
502			`iput(dir);`
503			`iput(inode);`
504			`iput(oldinode);`
505
506			`return error;`
507			`}`
508
509			`static int`
510			`subdir(struct inode * new_inode, struct inode * old_inode)`
511			`{`
512			`int ino;`
513			`int result;`
514
515			`new_inode->i_count++;`
516			`result = 0;`
517			`for (;;) {`
518			`if (new_inode == old_inode) {`
519			`result = 1;`
520			`break;`
521			`}`
522			`if (new_inode->i_dev != old_inode->i_dev)`
523			`break;`
524			`ino = new_inode->i_ino;`
525			`if (affs_lookup(new_inode,"..",2,&new_inode))`
526			`break;`
527			`if (new_inode->i_ino == ino)`
528			`break;`
529			`}`
530			`iput(new_inode);`
531			`return result;`
532			`}`
533
534			`/* I'm afraid this might not be race proof. Maybe next time. */`
535
536			`int`
537			`affs_rename(struct inode old_dir, const char old_name, int old_len,`
538			`struct inode new_dir, const char new_name, int new_len,`
539			`int must_be_dir)`
540			`{`
541			`struct inode *old_inode;`
542			`struct inode *new_inode;`
543			`struct buffer_head *old_bh;`
544			`struct buffer_head *new_bh;`
545			`unsigned long old_ino;`
546			`unsigned long new_ino;`
547			`int retval;`
548
549			`pr_debug("AFFS: rename(old=%lu,\"%s\" to new=%lu,\"%s\")\n",old_dir->i_ino,old_len,old_name,`
550			`new_dir->i_ino,new_len,new_name);`
551
552			`if (new_len > 30)`
553			`new_len = 30;`
554			`goto start_up;`
555			`retry:`
556			`affs_brelse(old_bh);`
557			`affs_brelse(new_bh);`
558			`iput(new_inode);`
559			`iput(old_inode);`
560			`current->counter = 0;`
561			`schedule();`
562			`start_up:`
563			`old_inode = new_inode = NULL;`
564			`old_bh = new_bh = NULL;`
565			`retval = -ENOENT;`
566
567			`old_bh = affs_find_entry(old_dir,old_name,old_len,&old_ino);`
568			`if (!old_bh)`
569			`goto end_rename;`
570			`old_inode = __iget(old_dir->i_sb,old_ino,0);`
571			`if (!old_inode)`
572			`goto end_rename;`
573			`if (must_be_dir && !S_ISDIR(old_inode->i_mode))`
574			`goto end_rename;`
575			`new_bh = affs_find_entry(new_dir,new_name,new_len,&new_ino);`
576			`if (new_bh) {`
577			`new_inode = __iget(new_dir->i_sb,new_ino,0);`
578			`if (!new_inode) { /* What does this mean? */`
579			`affs_brelse(new_bh);`
580			`new_bh = NULL;`
581			`}`
582			`}`
583			`if (new_inode == old_inode) { /* Won't happen */`
584			`retval = 0;`
585			`goto end_rename;`
586			`}`
587			`if (new_inode && S_ISDIR(new_inode->i_mode)) {`
588			`retval = -EISDIR;`
589			`if (!S_ISDIR(old_inode->i_mode))`
590			`goto end_rename;`
591			`retval = -EINVAL;`
592			`if (subdir(new_dir,old_inode))`
593			`goto end_rename;`
594			`retval = -ENOTEMPTY;`
595			`if (!empty_dir(new_bh,AFFS_I2HSIZE(new_inode)))`
596			`goto end_rename;`
597			`retval = -EBUSY;`
598			`if (new_inode->i_count > 1)`
599			`goto end_rename;`
600			`}`
601			`if (S_ISDIR(old_inode->i_mode)) {`
602			`retval = -ENOTDIR;`
603			`if (new_inode && !S_ISDIR(new_inode->i_mode))`
604			`goto end_rename;`
605			`retval = -EINVAL;`
606			`if (subdir(new_dir,old_inode))`
607			`goto end_rename;`
608			`if (affs_parent_ino(old_inode) != old_dir->i_ino)`
609			`goto end_rename;`
610			`}`
611			`/* Unlink destination if existent */`
612			`if (new_inode) {`
613			`if ((retval = affs_fix_hash_pred(new_dir,affs_hash_name(new_name,new_len,`
614			`AFFS_I2FSTYPE(new_dir),AFFS_I2HSIZE(new_dir)) + 6,`
615			`new_ino,`
616			`FILE_END(new_bh->b_data,new_dir)->hash_chain)))`
617			`goto retry;`
618			`if ((retval = affs_fixup(new_bh,new_inode)))`
619			`goto retry;`
620			`mark_buffer_dirty(new_bh,1);`
621			`new_dir->i_version = ++event;`
622			`new_dir->i_dirt = 1;`
623			`new_inode->i_nlink = 0;`
624			`new_inode->i_dirt = 1;`
625			`}`
626			`retval = affs_fix_hash_pred(old_dir,affs_hash_name(old_name,old_len,AFFS_I2FSTYPE(old_dir),`
627			`AFFS_I2HSIZE(old_dir)) + 6,old_ino,`
628			`FILE_END(old_bh->b_data,old_dir)->hash_chain);`
629			`if (retval)`
630			`goto retry;`
631
632			`retval = affs_add_entry(new_dir,NULL,old_inode,new_name,new_len,`
633			`htonl(FILE_END(old_bh->b_data,old_dir)->secondary_type));`
634
635			`new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;`
636			`new_dir->i_version = ++event;`
637			`old_dir->i_version = ++event;`
638			`new_dir->i_dirt = 1;`
639			`old_dir->i_dirt = 1;`
640			`mark_buffer_dirty(old_bh,1);`
641
642			`end_rename:`
643			`affs_brelse(old_bh);`
644			`affs_brelse(new_bh);`
645			`iput(new_inode);`
646			`iput(old_inode);`
647			`iput(old_dir);`
648			`iput(new_dir);`
649
650			`return retval;`
651			`}`
652
653			`int`
654			`affs_fixup(struct buffer_head bh, struct inode inode)`
655			`{`
656			`int key, link_key;`
657			`int type;`
658			`struct buffer_head *nbh;`
659			`struct inode *ofinode;`
660
661			`type = htonl(FILE_END(bh->b_data,inode)->secondary_type);`
662			`if (type == ST_LINKFILE \|\| type == ST_LINKDIR) {`
663			`key = htonl(LINK_END(bh->b_data,inode)->original);`
664			`LINK_END(bh->b_data,inode)->original = 0;`
665			`if (!key) {`
666			`printk("AFFS: fixup(): hard link without original: ino=%lu\n",inode->i_ino);`
667			`return -ENOENT;`
668			`}`
669			`if (!(ofinode = iget(inode->i_sb,key)))`
670			`return -ENOENT;`
671			`type = affs_fix_link_pred(ofinode,inode->i_ino,`
672			`FILE_END(bh->b_data,inode)->link_chain);`
673			`iput(ofinode);`
674			`return type;`
675			`} else if (type == ST_FILE \|\| type == ST_USERDIR) {`
676			`if ((key = htonl(FILE_END(bh->b_data,inode)->link_chain))) {`
677			`/* Get first link, turn it to a file */`
678			`if (!(ofinode = iget(inode->i_sb,key))) {`
679			`printk("AFFS: fixup(): cannot read inode %u\n",key);`
680			`return -ENOENT;`
681			`}`
682			`if (!ofinode->u.affs_i.i_hlink) {`
683			`printk("AFFS: fixup(): first link to %lu (%u) is not a link?\n",`
684			`inode->i_ino,key);`
685			`iput(ofinode);`
686			`return -ENOENT;`
687			`}`
688			`if (!(nbh = affs_bread(inode->i_dev,key,AFFS_I2BSIZE(inode)))) {`
689			`printk("AFFS: fixup(): cannot read block %u\n",key);`
690			`iput(ofinode);`
691			`return -ENOENT;`
692			`}`
693			`lock_super(inode->i_sb);`
694			`memcpy(nbh->b_data + 8,bh->b_data + 8,AFFS_I2BSIZE(inode) - 208);`
695			`FILE_END(nbh->b_data,inode)->byte_size = FILE_END(bh->b_data,inode)->`
696			`byte_size;`
697			`FILE_END(nbh->b_data,inode)->extension = FILE_END(bh->b_data,inode)->`
698			`extension;`
699			`FILE_END(nbh->b_data,inode)->secondary_type = FILE_END(bh->b_data,inode)->`
700			`secondary_type;`
701			`FILE_END(nbh->b_data,inode)->original = 0;`
702
703			`ofinode->u.affs_i.i_original = 0;`
704			`ofinode->u.affs_i.i_hlink = 0;`
705			`ofinode->i_size = inode->i_size;`
706			`ofinode->i_uid = inode->i_uid;`
707			`ofinode->i_gid = inode->i_gid;`
708			`ofinode->i_dirt = 1;`
709			`link_key = ofinode->i_ino;`
710
711			`/* Let all remaining links point to the new file */`
712			`while (1) {`
713			`affs_fix_checksum(AFFS_I2BSIZE(inode),nbh->b_data,5);`
714			`mark_buffer_dirty(nbh,1);`
715			`key = htonl(FILE_END(nbh->b_data,inode)->link_chain);`
716			`affs_brelse(nbh);`
717			`iput(ofinode);`
718			`if (!key \|\| !(nbh = affs_bread(inode->i_dev,key,AFFS_I2BSIZE(inode))))`
719			`break;`
720			`if ((ofinode = iget(inode->i_sb,key))) {`
721			`if (!ofinode->u.affs_i.i_hlink)`
722			`printk("AFFS: fixup() inode %u in link chain is "`
723			`"not a link\n",key);`
724			`ofinode->u.affs_i.i_original = link_key;`
725			`ofinode->i_dirt = 1;`
726			`FILE_END(nbh->b_data,inode)->original = htonl(link_key);`
727			`} else`
728			`printk("AFFS: fixup(): cannot get inode %u\n",key);`
729			`}`
730			`/* Turn old inode to a link */`
731			`inode->u.affs_i.i_hlink = 1;`
732			`unlock_super(inode->i_sb);`
733			`}`
734			`return 0;`
735			`} else if (type == ST_SOFTLINK) {`
736			`return 0;`
737			`} else {`
738			`printk("AFFS: fixup(): secondary type=%d\n",type);`
739			`return -EBADF;`
740			`}`
741			`}`