struct dentry * qnx4_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
{
int ino;
struct qnx4_inode_entry *de;
struct qnx4_link_info *lnk;
struct buffer_head *bh;
const char *name = dentry->d_name.name;
int len = dentry->d_name.len;
struct inode *foundinode = NULL;
lock_kernel();
if (!(bh = qnx4_find_entry(len, dir, name, &de, &ino)))
goto out;
/* The entry is linked, let's get the real info */
if ((de->di_status & QNX4_FILE_LINK) == QNX4_FILE_LINK) {
lnk = (struct qnx4_link_info *) de;
ino = (le32_to_cpu(lnk->dl_inode_blk) - 1) *
QNX4_INODES_PER_BLOCK +
lnk->dl_inode_ndx;
}
brelse(bh);
foundinode = qnx4_iget(dir->i_sb, ino);
if (IS_ERR(foundinode)) {
unlock_kernel();
QNX4DEBUG(("qnx4: lookup->iget -> error %ld\n",
PTR_ERR(foundinode)));
return ERR_CAST(foundinode);
}
out:
unlock_kernel();
d_add(dentry, foundinode);
return NULL;
}
struct dentry * qnx4_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
{
int ino;
struct qnx4_inode_entry *de;
struct qnx4_link_info *lnk;
struct buffer_head *bh;
const char *name = dentry->d_name.name;
int len = dentry->d_name.len;
struct inode *foundinode = NULL;
if (!(bh = qnx4_find_entry(len, dir, name, &de, &ino)))
goto out;
/* The entry is linked, let's get the real info */
if ((de->di_status & QNX4_FILE_LINK) == QNX4_FILE_LINK) {
lnk = (struct qnx4_link_info *) de;
ino = (le32_to_cpu(lnk->dl_inode_blk) - 1) *
QNX4_INODES_PER_BLOCK +
lnk->dl_inode_ndx;
}
brelse(bh);
foundinode = qnx4_iget(dir->i_sb, ino);
if (IS_ERR(foundinode))
QNX4DEBUG((KERN_ERR "qnx4: lookup->iget -> error %ld\n",
PTR_ERR(foundinode)));
out:
return d_splice_alias(foundinode, dentry);
}
int qnx4_rmdir(struct inode *dir, struct dentry *dentry)
{
struct buffer_head *bh;
struct qnx4_inode_entry *de;
struct inode *inode;
int retval;
int ino;
QNX4DEBUG(("qnx4: qnx4_rmdir [%s]\n", dentry->d_name.name));
lock_kernel();
bh = qnx4_find_entry(dentry->d_name.len, dir, dentry->d_name.name,
&de, &ino);
if (bh == NULL) {
unlock_kernel();
return -ENOENT;
}
inode = dentry->d_inode;
if (inode->i_ino != ino) {
retval = -EIO;
goto end_rmdir;
}
#if 0
if (!empty_dir(inode)) {
retval = -ENOTEMPTY;
goto end_rmdir;
}
#endif
if (inode->i_nlink != 2) {
QNX4DEBUG(("empty directory has nlink!=2 (%d)\n", inode->i_nlink));
}
QNX4DEBUG(("qnx4: deleting directory\n"));
de->di_status = 0;
memset(de->di_fname, 0, sizeof de->di_fname);
de->di_mode = 0;
mark_buffer_dirty(bh);
inode->i_nlink = 0;
mark_inode_dirty(inode);
inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC;
dir->i_nlink--;
mark_inode_dirty(dir);
retval = 0;
end_rmdir:
brelse(bh);
unlock_kernel();
return retval;
}
int qnx4_unlink(struct inode *dir, struct dentry *dentry)
{
struct buffer_head *bh;
struct qnx4_inode_entry *de;
struct inode *inode;
int retval;
int ino;
QNX4DEBUG(("qnx4: qnx4_unlink [%s]\n", dentry->d_name.name));
lock_kernel();
bh = qnx4_find_entry(dentry->d_name.len, dir, dentry->d_name.name,
&de, &ino);
if (bh == NULL) {
unlock_kernel();
return -ENOENT;
}
inode = dentry->d_inode;
if (inode->i_ino != ino) {
retval = -EIO;
goto end_unlink;
}
retval = -EPERM;
if (!inode->i_nlink) {
QNX4DEBUG(("Deleting nonexistent file (%s:%lu), %d\n",
inode->i_sb->s_id,
inode->i_ino, inode->i_nlink));
inode->i_nlink = 1;
}
de->di_status = 0;
memset(de->di_fname, 0, sizeof de->di_fname);
de->di_mode = 0;
mark_buffer_dirty(bh);
dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC;
mark_inode_dirty(dir);
inode->i_nlink--;
inode->i_ctime = dir->i_ctime;
mark_inode_dirty(inode);
retval = 0;
end_unlink:
unlock_kernel();
brelse(bh);
return retval;
}
