int
affs_rename(struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry)
{
struct super_block *sb = old_dir->i_sb;
struct buffer_head *bh = NULL;
int retval;
pr_debug("%s(old=%lu,\"%pd\" to new=%lu,\"%pd\")\n", __func__,
old_dir->i_ino, old_dentry, new_dir->i_ino, new_dentry);
retval = affs_check_name(new_dentry->d_name.name,
new_dentry->d_name.len,
affs_nofilenametruncate(old_dentry));
if (retval)
return retval;
/* Unlink destination if it already exists */
if (new_dentry->d_inode) {
retval = affs_remove_header(new_dentry);
if (retval)
return retval;
}
bh = affs_bread(sb, old_dentry->d_inode->i_ino);
if (!bh)
return -EIO;
/* Remove header from its parent directory. */
affs_lock_dir(old_dir);
retval = affs_remove_hash(old_dir, bh);
affs_unlock_dir(old_dir);
if (retval)
goto done;
/* And insert it into the new directory with the new name. */
affs_copy_name(AFFS_TAIL(sb, bh)->name, new_dentry);
affs_fix_checksum(sb, bh);
affs_lock_dir(new_dir);
retval = affs_insert_hash(new_dir, bh);
affs_unlock_dir(new_dir);
/* TODO: move it back to old_dir, if error? */
done:
mark_buffer_dirty_inode(bh, retval ? old_dir : new_dir);
affs_brelse(bh);
return retval;
}
int
affs_add_entry(struct inode *dir, struct inode *inode, struct dentry *dentry, s32 type)
{
struct super_block *sb = dir->i_sb;
struct buffer_head *inode_bh = NULL;
struct buffer_head *bh = NULL;
u32 block = 0;
int retval;
pr_debug("AFFS: add_entry(dir=%u, inode=%u, \"%*s\", type=%d)\n", (u32)dir->i_ino,
(u32)inode->i_ino, (int)dentry->d_name.len, dentry->d_name.name, type);
retval = -EIO;
bh = affs_bread(sb, inode->i_ino);
if (!bh)
goto done;
affs_lock_link(inode);
switch (type) {
case ST_LINKFILE:
case ST_LINKDIR:
retval = -ENOSPC;
block = affs_alloc_block(dir, dir->i_ino);
if (!block)
goto err;
retval = -EIO;
inode_bh = bh;
bh = affs_getzeroblk(sb, block);
if (!bh)
goto err;
break;
default:
break;
}
AFFS_HEAD(bh)->ptype = cpu_to_be32(T_SHORT);
AFFS_HEAD(bh)->key = cpu_to_be32(bh->b_blocknr);
affs_copy_name(AFFS_TAIL(sb, bh)->name, dentry);
AFFS_TAIL(sb, bh)->stype = cpu_to_be32(type);
AFFS_TAIL(sb, bh)->parent = cpu_to_be32(dir->i_ino);
if (inode_bh) {
__be32 chain;
chain = AFFS_TAIL(sb, inode_bh)->link_chain;
AFFS_TAIL(sb, bh)->original = cpu_to_be32(inode->i_ino);
AFFS_TAIL(sb, bh)->link_chain = chain;
AFFS_TAIL(sb, inode_bh)->link_chain = cpu_to_be32(block);
affs_adjust_checksum(inode_bh, block - be32_to_cpu(chain));
mark_buffer_dirty_inode(inode_bh, inode);
inode->i_nlink = 2;
atomic_inc(&inode->i_count);
}
affs_fix_checksum(sb, bh);
mark_buffer_dirty_inode(bh, inode);
dentry->d_fsdata = (void *)(long)bh->b_blocknr;
affs_lock_dir(dir);
retval = affs_insert_hash(dir, bh);
mark_buffer_dirty_inode(bh, inode);
affs_unlock_dir(dir);
affs_unlock_link(inode);
d_instantiate(dentry, inode);
done:
affs_brelse(inode_bh);
affs_brelse(bh);
return retval;
err:
if (block)
affs_free_block(sb, block);
affs_unlock_link(inode);
goto done;
}
static int
affs_remove_link(struct dentry *dentry)
{
struct inode *dir, *inode = dentry->d_inode;
struct super_block *sb = inode->i_sb;
struct buffer_head *bh = NULL, *link_bh = NULL;
u32 link_ino, ino;
int retval;
pr_debug("AFFS: remove_link(key=%ld)\n", inode->i_ino);
retval = -EIO;
bh = affs_bread(sb, inode->i_ino);
if (!bh)
goto done;
link_ino = (u32)(long)dentry->d_fsdata;
if (inode->i_ino == link_ino) {
/* we can't remove the head of the link, as its blocknr is still used as ino,
* so we remove the block of the first link instead.
*/
link_ino = be32_to_cpu(AFFS_TAIL(sb, bh)->link_chain);
link_bh = affs_bread(sb, link_ino);
if (!link_bh)
goto done;
dir = affs_iget(sb, be32_to_cpu(AFFS_TAIL(sb, link_bh)->parent));
if (IS_ERR(dir)) {
retval = PTR_ERR(dir);
goto done;
}
affs_lock_dir(dir);
affs_fix_dcache(dentry, link_ino);
retval = affs_remove_hash(dir, link_bh);
if (retval) {
affs_unlock_dir(dir);
goto done;
}
mark_buffer_dirty_inode(link_bh, inode);
memcpy(AFFS_TAIL(sb, bh)->name, AFFS_TAIL(sb, link_bh)->name, 32);
retval = affs_insert_hash(dir, bh);
if (retval) {
affs_unlock_dir(dir);
goto done;
}
mark_buffer_dirty_inode(bh, inode);
affs_unlock_dir(dir);
iput(dir);
} else {
link_bh = affs_bread(sb, link_ino);
if (!link_bh)
goto done;
}
while ((ino = be32_to_cpu(AFFS_TAIL(sb, bh)->link_chain)) != 0) {
if (ino == link_ino) {
__be32 ino2 = AFFS_TAIL(sb, link_bh)->link_chain;
AFFS_TAIL(sb, bh)->link_chain = ino2;
affs_adjust_checksum(bh, be32_to_cpu(ino2) - link_ino);
mark_buffer_dirty_inode(bh, inode);
retval = 0;
/* Fix the link count, if bh is a normal header block without links */
switch (be32_to_cpu(AFFS_TAIL(sb, bh)->stype)) {
case ST_LINKDIR:
case ST_LINKFILE:
break;
default:
if (!AFFS_TAIL(sb, bh)->link_chain)
inode->i_nlink = 1;
}
affs_free_block(sb, link_ino);
goto done;
}
affs_brelse(bh);
bh = affs_bread(sb, ino);
if (!bh)
goto done;
}
retval = -ENOENT;
done:
affs_brelse(link_bh);
affs_brelse(bh);
return retval;
}
int
affs_rename(struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry)
{
struct inode *old_inode = old_dentry->d_inode;
struct inode *new_inode = new_dentry->d_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\" (inode=%p) to new=%lu,\"%*s\" (inode=%p))\n",
old_dir->i_ino,old_dentry->d_name.len,old_dentry->d_name.name,old_inode,
new_dir->i_ino,new_dentry->d_name.len,new_dentry->d_name.name,new_inode);
if ((retval = affs_check_name(new_dentry->d_name.name,new_dentry->d_name.len)))
goto out;
new_bh = NULL;
retval = -ENOENT;
old_bh = affs_find_entry(old_dir,old_dentry,&old_ino);
if (!old_bh)
goto end_rename;
new_bh = affs_find_entry(new_dir,new_dentry,&new_ino);
if (new_bh && !new_inode) {
affs_error(old_inode->i_sb,"affs_rename",
"No inode for entry found (key=%lu)\n",new_ino);
goto end_rename;
}
if (S_ISDIR(old_inode->i_mode)) {
if (new_inode) {
retval = -ENOTEMPTY;
if (!empty_dir(new_bh,AFFS_I2HSIZE(new_inode)))
goto end_rename;
}
retval = -ENOENT;
if (affs_parent_ino(old_inode) != old_dir->i_ino)
goto end_rename;
}
/* Unlink destination if it already exists */
if (new_inode) {
if ((retval = affs_remove_header(new_bh,new_dir)) < 0)
goto end_rename;
new_inode->i_nlink = retval;
mark_inode_dirty(new_inode);
if (new_inode->i_ino == new_ino)
new_inode->i_nlink = 0;
}
/* Remove header from its parent directory. */
if ((retval = affs_remove_hash(old_bh,old_dir)))
goto end_rename;
/* And insert it into the new directory with the new name. */
affs_copy_name(FILE_END(old_bh->b_data,old_inode)->file_name,new_dentry->d_name.name);
if ((retval = affs_insert_hash(new_dir->i_ino,old_bh,new_dir)))
goto end_rename;
affs_fix_checksum(AFFS_I2BSIZE(new_dir),old_bh->b_data,5);
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;
retval = 0;
mark_inode_dirty(new_dir);
mark_inode_dirty(old_dir);
mark_buffer_dirty(old_bh,1);
end_rename:
affs_brelse(old_bh);
affs_brelse(new_bh);
out:
return retval;
}
int
affs_add_entry(struct inode *dir, struct inode *link, struct inode *inode,
struct dentry *dentry, int type)
{
struct buffer_head *dir_bh;
struct buffer_head *inode_bh;
struct buffer_head *link_bh;
int retval;
const unsigned char *name = dentry->d_name.name;
int len = dentry->d_name.len;
pr_debug("AFFS: add_entry(dir=%lu,inode=%lu,\"%*s\",type=%d)\n",dir->i_ino,inode->i_ino,
len,name,type);
if ((retval = affs_check_name(name,len)))
return retval;
if (len > 30)
len = 30;
dir_bh = affs_bread(dir->i_dev,dir->i_ino,AFFS_I2BSIZE(dir));
inode_bh = affs_bread(inode->i_dev,inode->i_ino,AFFS_I2BSIZE(inode));
link_bh = NULL;
retval = -EIO;
if (!dir_bh || !inode_bh)
goto addentry_done;
if (link) {
link_bh = affs_bread(link->i_dev,link->i_ino,AFFS_I2BSIZE(link));
if (!link_bh)
goto addentry_done;
}
((struct dir_front *)inode_bh->b_data)->primary_type = cpu_to_be32(T_SHORT);
((struct dir_front *)inode_bh->b_data)->own_key = cpu_to_be32(inode->i_ino);
DIR_END(inode_bh->b_data,inode)->dir_name[0] = len;
strncpy(DIR_END(inode_bh->b_data,inode)->dir_name + 1,name,len);
DIR_END(inode_bh->b_data,inode)->secondary_type = cpu_to_be32(type);
DIR_END(inode_bh->b_data,inode)->parent = cpu_to_be32(dir->i_ino);
lock_super(inode->i_sb);
retval = affs_insert_hash(dir->i_ino,inode_bh,dir);
if (link_bh) {
LINK_END(inode_bh->b_data,inode)->original = cpu_to_be32(link->i_ino);
LINK_END(inode_bh->b_data,inode)->link_chain =
FILE_END(link_bh->b_data,link)->link_chain;
FILE_END(link_bh->b_data,link)->link_chain = cpu_to_be32(inode->i_ino);
affs_fix_checksum(AFFS_I2BSIZE(link),link_bh->b_data,5);
link->i_version = ++global_event;
mark_inode_dirty(link);
mark_buffer_dirty(link_bh,1);
}
affs_fix_checksum(AFFS_I2BSIZE(inode),inode_bh->b_data,5);
affs_fix_checksum(AFFS_I2BSIZE(dir),dir_bh->b_data,5);
dir->i_version = ++global_event;
dir->i_mtime = dir->i_atime = dir->i_ctime = CURRENT_TIME;
unlock_super(inode->i_sb);
mark_inode_dirty(dir);
mark_inode_dirty(inode);
mark_buffer_dirty(dir_bh,1);
mark_buffer_dirty(inode_bh,1);
addentry_done:
affs_brelse(dir_bh);
affs_brelse(inode_bh);
affs_brelse(link_bh);
return retval;
}
