static int reiserfs_symlink(struct inode *parent_dir,
struct dentry *dentry, const char *symname)
{
int retval;
struct inode *inode;
char *name;
int item_len;
struct reiserfs_transaction_handle th;
struct reiserfs_security_handle security;
int mode = S_IFLNK | S_IRWXUGO;
/* We need blocks for transaction + (user+group)*(quotas for new inode + update of quota for directory owner) */
int jbegin_count =
JOURNAL_PER_BALANCE_CNT * 3 +
2 * (REISERFS_QUOTA_INIT_BLOCKS(parent_dir->i_sb) +
REISERFS_QUOTA_TRANS_BLOCKS(parent_dir->i_sb));
dquot_initialize(parent_dir);
if (!(inode = new_inode(parent_dir->i_sb))) {
return -ENOMEM;
}
new_inode_init(inode, parent_dir, mode);
retval = reiserfs_security_init(parent_dir, inode, &dentry->d_name,
&security);
if (retval < 0) {
drop_new_inode(inode);
return retval;
}
jbegin_count += retval;
reiserfs_write_lock(parent_dir->i_sb);
item_len = ROUND_UP(strlen(symname));
if (item_len > MAX_DIRECT_ITEM_LEN(parent_dir->i_sb->s_blocksize)) {
retval = -ENAMETOOLONG;
drop_new_inode(inode);
goto out_failed;
}
name = kmalloc(item_len, GFP_NOFS);
if (!name) {
drop_new_inode(inode);
retval = -ENOMEM;
goto out_failed;
}
memcpy(name, symname, strlen(symname));
padd_item(name, item_len, strlen(symname));
retval = journal_begin(&th, parent_dir->i_sb, jbegin_count);
if (retval) {
drop_new_inode(inode);
kfree(name);
goto out_failed;
}
retval =
reiserfs_new_inode(&th, parent_dir, mode, name, strlen(symname),
dentry, inode, &security);
kfree(name);
if (retval) { /* reiserfs_new_inode iputs for us */
goto out_failed;
}
reiserfs_update_inode_transaction(inode);
reiserfs_update_inode_transaction(parent_dir);
inode->i_op = &reiserfs_symlink_inode_operations;
inode->i_mapping->a_ops = &reiserfs_address_space_operations;
// must be sure this inode is written with this transaction
//
//reiserfs_update_sd (&th, inode, READ_BLOCKS);
retval = reiserfs_add_entry(&th, parent_dir, dentry->d_name.name,
dentry->d_name.len, inode, 1 /*visible */ );
if (retval) {
int err;
drop_nlink(inode);
reiserfs_update_sd(&th, inode);
err = journal_end(&th, parent_dir->i_sb, jbegin_count);
if (err)
retval = err;
unlock_new_inode(inode);
iput(inode);
goto out_failed;
}
unlock_new_inode(inode);
d_instantiate(dentry, inode);
retval = journal_end(&th, parent_dir->i_sb, jbegin_count);
out_failed:
reiserfs_write_unlock(parent_dir->i_sb);
return retval;
}
static int reiserfs_symlink (struct inode * parent_dir,
struct dentry * dentry, const char * symname)
{
int retval;
struct inode * inode;
char * name;
int item_len;
struct reiserfs_transaction_handle th ;
int mode = S_IFLNK | S_IRWXUGO;
int jbegin_count = JOURNAL_PER_BALANCE_CNT * 3;
if (!(inode = new_inode(parent_dir->i_sb))) {
return -ENOMEM ;
}
retval = new_inode_init(inode, parent_dir, mode);
if (retval) {
return retval;
}
reiserfs_write_lock(parent_dir->i_sb);
item_len = ROUND_UP (strlen (symname));
if (item_len > MAX_DIRECT_ITEM_LEN (parent_dir->i_sb->s_blocksize)) {
retval = -ENAMETOOLONG;
drop_new_inode(inode);
goto out_failed;
}
name = reiserfs_kmalloc (item_len, GFP_NOFS, parent_dir->i_sb);
if (!name) {
drop_new_inode(inode);
retval = -ENOMEM;
goto out_failed;
}
memcpy (name, symname, strlen (symname));
padd_item (name, item_len, strlen (symname));
/* We would inherit the default ACL here, but symlinks don't get ACLs */
journal_begin(&th, parent_dir->i_sb, jbegin_count) ;
retval = reiserfs_new_inode (&th, parent_dir, mode, name, strlen (symname),
dentry, inode);
reiserfs_kfree (name, item_len, parent_dir->i_sb);
if (retval) { /* reiserfs_new_inode iputs for us */
goto out_failed;
}
reiserfs_update_inode_transaction(inode) ;
reiserfs_update_inode_transaction(parent_dir) ;
inode->i_op = &reiserfs_symlink_inode_operations;
inode->i_mapping->a_ops = &reiserfs_address_space_operations;
// must be sure this inode is written with this transaction
//
//reiserfs_update_sd (&th, inode, READ_BLOCKS);
retval = reiserfs_add_entry (&th, parent_dir, dentry->d_name.name,
dentry->d_name.len, inode, 1/*visible*/);
if (retval) {
inode->i_nlink--;
reiserfs_update_sd (&th, inode);
journal_end(&th, parent_dir->i_sb, jbegin_count) ;
iput (inode);
goto out_failed;
}
d_instantiate(dentry, inode);
journal_end(&th, parent_dir->i_sb, jbegin_count) ;
out_failed:
reiserfs_write_unlock(parent_dir->i_sb);
return retval;
}
