static int reiserfs_link(struct dentry *old_dentry, struct inode *dir,
struct dentry *dentry)
{
int retval;
struct inode *inode = d_inode(old_dentry);
struct reiserfs_transaction_handle th;
/*
* We need blocks for transaction + update of quotas for
* the owners of the directory
*/
int jbegin_count =
JOURNAL_PER_BALANCE_CNT * 3 +
2 * REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb);
retval = dquot_initialize(dir);
if (retval)
return retval;
reiserfs_write_lock(dir->i_sb);
if (inode->i_nlink >= REISERFS_LINK_MAX) {
/* FIXME: sd_nlink is 32 bit for new files */
reiserfs_write_unlock(dir->i_sb);
return -EMLINK;
}
/* inc before scheduling so reiserfs_unlink knows we are here */
inc_nlink(inode);
retval = journal_begin(&th, dir->i_sb, jbegin_count);
if (retval) {
drop_nlink(inode);
reiserfs_write_unlock(dir->i_sb);
return retval;
}
/* create new entry */
retval =
reiserfs_add_entry(&th, dir, dentry->d_name.name,
dentry->d_name.len, inode, 1 /*visible */ );
reiserfs_update_inode_transaction(inode);
reiserfs_update_inode_transaction(dir);
if (retval) {
int err;
drop_nlink(inode);
err = journal_end(&th);
reiserfs_write_unlock(dir->i_sb);
return err ? err : retval;
}
inode->i_ctime = current_time(inode);
reiserfs_update_sd(&th, inode);
ihold(inode);
d_instantiate(dentry, inode);
retval = journal_end(&th);
reiserfs_write_unlock(dir->i_sb);
return retval;
}
int reiserfs_link (struct dentry * old_dentry, struct inode * dir, struct dentry * dentry)
{
struct inode *inode = old_dentry->d_inode;
struct path path_to_entry;
struct reiserfs_dir_entry de;
int error;
int windex ;
struct reiserfs_transaction_handle th ;
int jbegin_count = JOURNAL_PER_BALANCE_CNT * 3;
init_path (&path_to_entry);
/* object must not be directory */
if (S_ISDIR(inode->i_mode)) {
return -EPERM;
}
/* file has too many links */
if (inode->i_nlink >= REISERFS_LINK_MAX) {
return -EMLINK;
}
journal_begin(&th, dir->i_sb, jbegin_count) ;
windex = push_journal_writer("reiserfs_link") ;
reiserfs_update_inode_transaction(inode) ;
reiserfs_update_inode_transaction(dir) ;
de.de_gen_number_bit_string = 0;
if (reiserfs_find_entry (dir, dentry->d_name.name, dentry->d_name.len, &path_to_entry, &de) == POSITION_FOUND) {
pathrelse (&path_to_entry);
pop_journal_writer(windex) ;
journal_end(&th, dir->i_sb, jbegin_count) ;
return -EEXIST;
}
pathrelse (&path_to_entry);
/* free preserve list if we should */
/* maybe_free_preserve_list (dir->i_sb);*/
/* create new entry */
error = reiserfs_add_entry (&th, dir, dentry->d_name.name, dentry->d_name.len, INODE_PKEY (inode), &de, 1);
if (error) {
pop_journal_writer(windex) ;
journal_end(&th, dir->i_sb, jbegin_count) ;
return error;
}
inode->i_nlink++;
inode->i_ctime = CURRENT_TIME;
if_in_ram_update_sd (&th, inode);
if_in_ram_update_sd (&th, dir);
inode->i_count++;
d_instantiate(dentry, inode);
pop_journal_writer(windex) ;
journal_end(&th, dir->i_sb, jbegin_count) ;
return 0;
}
static int reiserfs_link(struct dentry *old_dentry, struct inode *dir,
struct dentry *dentry)
{
int retval;
struct inode *inode = old_dentry->d_inode;
struct reiserfs_transaction_handle th;
/* We need blocks for transaction + update of quotas for the owners of the directory */
int jbegin_count =
JOURNAL_PER_BALANCE_CNT * 3 +
2 * REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb);
reiserfs_write_lock(dir->i_sb);
if (inode->i_nlink >= REISERFS_LINK_MAX) {
//FIXME: sd_nlink is 32 bit for new files
reiserfs_write_unlock(dir->i_sb);
return -EMLINK;
}
if (inode->i_nlink == 0) {
reiserfs_write_unlock(dir->i_sb);
return -ENOENT;
}
/* inc before scheduling so reiserfs_unlink knows we are here */
inode->i_nlink++;
retval = journal_begin(&th, dir->i_sb, jbegin_count);
if (retval) {
inode->i_nlink--;
reiserfs_write_unlock(dir->i_sb);
return retval;
}
/* create new entry */
retval =
reiserfs_add_entry(&th, dir, dentry->d_name.name,
dentry->d_name.len, inode, 1 /*visible */ );
reiserfs_update_inode_transaction(inode);
reiserfs_update_inode_transaction(dir);
if (retval) {
int err;
inode->i_nlink--;
err = journal_end(&th, dir->i_sb, jbegin_count);
reiserfs_write_unlock(dir->i_sb);
return err ? err : retval;
}
inode->i_ctime = CURRENT_TIME_SEC;
reiserfs_update_sd(&th, inode);
atomic_inc(&inode->i_count);
d_instantiate(dentry, inode);
retval = journal_end(&th, dir->i_sb, jbegin_count);
reiserfs_write_unlock(dir->i_sb);
return retval;
}
static int reiserfs_create (struct inode * dir, struct dentry *dentry, int mode,
struct nameidata *nd)
{
int retval;
struct inode * inode;
int jbegin_count = JOURNAL_PER_BALANCE_CNT * 2 ;
struct reiserfs_transaction_handle th ;
int locked;
if (!(inode = new_inode(dir->i_sb))) {
return -ENOMEM ;
}
retval = new_inode_init(inode, dir, mode);
if (retval)
return retval;
locked = reiserfs_cache_default_acl (dir);
reiserfs_write_lock(dir->i_sb);
if (locked)
reiserfs_write_lock_xattrs (dir->i_sb);
journal_begin(&th, dir->i_sb, jbegin_count) ;
retval = reiserfs_new_inode (&th, dir, mode, 0, 0/*i_size*/, dentry, inode);
if (locked)
reiserfs_write_unlock_xattrs (dir->i_sb);
if (retval) {
goto out_failed;
}
inode->i_op = &reiserfs_file_inode_operations;
inode->i_fop = &reiserfs_file_operations;
inode->i_mapping->a_ops = &reiserfs_address_space_operations ;
retval = reiserfs_add_entry (&th, 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, dir->i_sb, jbegin_count) ;
iput (inode);
goto out_failed;
}
reiserfs_update_inode_transaction(inode) ;
reiserfs_update_inode_transaction(dir) ;
d_instantiate(dentry, inode);
journal_end(&th, dir->i_sb, jbegin_count) ;
out_failed:
reiserfs_write_unlock(dir->i_sb);
return retval;
}
int reiserfs_create (struct inode * dir, struct dentry *dentry, int mode)
{
int error;
struct inode * inode;
struct reiserfs_dir_entry de;
int windex ;
int jbegin_count = JOURNAL_PER_BALANCE_CNT * 2 ;
struct reiserfs_transaction_handle th ;
int err;
if (!dir)
return -ENOENT;
inode = get_empty_inode() ;
if (!inode) {
return -ENOSPC ;
}
journal_begin(&th, dir->i_sb, jbegin_count) ;
th.t_caller = "create" ;
windex = push_journal_writer("reiserfs_create") ;
inode = reiserfs_new_inode (&th, dir, mode, 0, dentry, inode, &err);
if (!inode) {
pop_journal_writer(windex) ;
journal_end(&th, dir->i_sb, jbegin_count) ;
return err;
}
reiserfs_update_inode_transaction(inode) ;
reiserfs_update_inode_transaction(dir) ;
inode->i_op = &reiserfs_file_inode_operations;
inode->i_mode = mode;
error = reiserfs_add_entry (&th, dir, dentry->d_name.name, dentry->d_name.len, INODE_PKEY (inode), &de, 1);
if (error) {
inode->i_nlink--;
if_in_ram_update_sd (&th, inode);
pop_journal_writer(windex) ;
journal_end(&th, dir->i_sb, jbegin_count) ;
iput (inode);
return error;
}
if_in_ram_update_sd (&th, dir);
d_instantiate(dentry, inode);
pop_journal_writer(windex) ;
journal_end(&th, dir->i_sb, jbegin_count) ;
return 0;
}
/*
** We pack the tails of files on file close, not at the time they are written.
** This implies an unnecessary copy of the tail and an unnecessary indirect item
** insertion/balancing, for files that are written in one write.
** It avoids unnecessary tail packings (balances) for files that are written in
** multiple writes and are small enough to have tails.
**
** file_release is called by the VFS layer when the file is closed. If
** this is the last open file descriptor, and the file
** small enough to have a tail, and the tail is currently in an
** unformatted node, the tail is converted back into a direct item.
**
** We use reiserfs_truncate_file to pack the tail, since it already has
** all the conditions coded.
*/
static int reiserfs_file_release (struct inode * inode, struct file * filp)
{
struct reiserfs_transaction_handle th ;
int windex ;
if (!S_ISREG (inode->i_mode))
BUG ();
/* fast out for when nothing needs to be done */
if ((atomic_read(&inode->i_count) > 1 ||
!(inode->u.reiserfs_i.i_flags & i_pack_on_close_mask) ||
!tail_has_to_be_packed(inode)) &&
inode->u.reiserfs_i.i_prealloc_count <= 0) {
return 0;
}
lock_kernel() ;
down (&inode->i_sem);
journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT * 3) ;
reiserfs_update_inode_transaction(inode) ;
#ifdef REISERFS_PREALLOCATE
reiserfs_discard_prealloc (&th, inode);
#endif
journal_end(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT * 3) ;
if (atomic_read(&inode->i_count) <= 1 &&
(inode->u.reiserfs_i.i_flags & i_pack_on_close_mask) &&
tail_has_to_be_packed (inode)) {
/* if regular file is released by last holder and it has been
appended (we append by unformatted node only) or its direct
item(s) had to be converted, then it may have to be
indirect2direct converted */
windex = push_journal_writer("file_release") ;
reiserfs_truncate_file(inode, 0) ;
pop_journal_writer(windex) ;
}
up (&inode->i_sem);
unlock_kernel() ;
return 0;
}
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_mkdir (struct inode * dir, struct dentry *dentry, int mode)
{
int retval;
struct inode * inode;
struct reiserfs_transaction_handle th ;
int jbegin_count = JOURNAL_PER_BALANCE_CNT * 3;
int locked;
#ifdef DISPLACE_NEW_PACKING_LOCALITIES
/* set flag that new packing locality created and new blocks for the content * of that directory are not displaced yet */
REISERFS_I(dir)->new_packing_locality = 1;
#endif
mode = S_IFDIR | mode;
if (!(inode = new_inode(dir->i_sb))) {
return -ENOMEM ;
}
retval = new_inode_init(inode, dir, mode);
if (retval)
return retval;
locked = reiserfs_cache_default_acl (dir);
reiserfs_write_lock(dir->i_sb);
if (locked)
reiserfs_write_lock_xattrs (dir->i_sb);
journal_begin(&th, dir->i_sb, jbegin_count) ;
/* inc the link count now, so another writer doesn't overflow it while
** we sleep later on.
*/
INC_DIR_INODE_NLINK(dir)
retval = reiserfs_new_inode (&th, dir, mode, 0/*symlink*/,
old_format_only (dir->i_sb) ?
EMPTY_DIR_SIZE_V1 : EMPTY_DIR_SIZE,
dentry, inode);
if (locked)
reiserfs_write_unlock_xattrs (dir->i_sb);
if (retval) {
dir->i_nlink-- ;
goto out_failed;
}
reiserfs_update_inode_transaction(inode) ;
reiserfs_update_inode_transaction(dir) ;
inode->i_op = &reiserfs_dir_inode_operations;
inode->i_fop = &reiserfs_dir_operations;
// note, _this_ add_entry will not update dir's stat data
retval = reiserfs_add_entry (&th, dir, dentry->d_name.name, dentry->d_name.len,
inode, 1/*visible*/);
if (retval) {
inode->i_nlink = 0;
DEC_DIR_INODE_NLINK(dir);
reiserfs_update_sd (&th, inode);
journal_end(&th, dir->i_sb, jbegin_count) ;
iput (inode);
goto out_failed;
}
// the above add_entry did not update dir's stat data
reiserfs_update_sd (&th, dir);
d_instantiate(dentry, inode);
journal_end(&th, dir->i_sb, jbegin_count) ;
out_failed:
reiserfs_write_unlock(dir->i_sb);
return retval;
}
static int reiserfs_mknod (struct inode * dir, struct dentry *dentry, int mode, dev_t rdev)
{
int retval;
struct inode * inode;
struct reiserfs_transaction_handle th ;
int jbegin_count = JOURNAL_PER_BALANCE_CNT * 3;
int locked;
if (!new_valid_dev(rdev))
return -EINVAL;
if (!(inode = new_inode(dir->i_sb))) {
return -ENOMEM ;
}
retval = new_inode_init(inode, dir, mode);
if (retval)
return retval;
locked = reiserfs_cache_default_acl (dir);
reiserfs_write_lock(dir->i_sb);
if (locked)
reiserfs_write_lock_xattrs (dir->i_sb);
journal_begin(&th, dir->i_sb, jbegin_count) ;
retval = reiserfs_new_inode (&th, dir, mode, 0, 0/*i_size*/, dentry, inode);
if (locked)
reiserfs_write_unlock_xattrs (dir->i_sb);
if (retval) {
goto out_failed;
}
inode->i_op = &reiserfs_special_inode_operations;
init_special_inode(inode, inode->i_mode, rdev) ;
//FIXME: needed for block and char devices only
reiserfs_update_sd (&th, inode);
reiserfs_update_inode_transaction(inode) ;
reiserfs_update_inode_transaction(dir) ;
retval = reiserfs_add_entry (&th, 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, dir->i_sb, jbegin_count) ;
iput (inode);
goto out_failed;
}
d_instantiate(dentry, inode);
journal_end(&th, dir->i_sb, jbegin_count) ;
out_failed:
reiserfs_write_unlock(dir->i_sb);
return retval;
}
int reiserfs_unlink (struct inode * dir, struct dentry *dentry)
{
int retval;
struct inode * inode;
struct reiserfs_dir_entry de;
struct path path;
int windex ;
int call_journal_end = 1 ;
struct reiserfs_transaction_handle th ;
int jbegin_count = JOURNAL_PER_BALANCE_CNT * 3;
init_path (&path);
retval = -ENOENT;
journal_begin(&th, dir->i_sb, jbegin_count) ;
windex = push_journal_writer("reiserfs_unlink") ;
/* free preserve list if we should */
/* maybe_free_preserve_list (dir->i_sb);*/
de.de_gen_number_bit_string = 0;
if (reiserfs_find_entry (dir, dentry->d_name.name, dentry->d_name.len, &path, &de) == POSITION_NOT_FOUND) {
goto end_unlink;
}
inode = dentry->d_inode;
reiserfs_update_inode_transaction(inode) ;
reiserfs_update_inode_transaction(dir) ;
retval = -EPERM;
if (S_ISDIR (inode->i_mode)) {
goto end_unlink;
}
if ((dir->i_mode & S_ISVTX) && !fsuser() &&
current->fsuid != inode->i_uid &&
current->fsuid != dir->i_uid) {
goto end_unlink;
}
retval = -ENOENT;
if (comp_short_keys ((struct key *)&(de.de_dir_id), INODE_PKEY (inode))) {
goto end_unlink;
}
if (!inode->i_nlink) {
printk("reiserfs_unlink: deleting nonexistent file (%s:%lu), %d\n",
kdevname(inode->i_dev), inode->i_ino, inode->i_nlink);
inode->i_nlink = 1;
}
if (reiserfs_cut_from_item (&th, dir, dir->i_sb, &path, &(de.de_entry_num), &(de.de_entry_key), 0, NOTHING_SPECIAL) == 0) {
retval = -ENOENT;
goto end_unlink;
}
inode->i_nlink--;
inode->i_ctime = CURRENT_TIME;
if_in_ram_update_sd (&th, inode);
dir->i_size -= (de.de_entrylen + DEH_SIZE);
dir->i_ctime = dir->i_mtime = CURRENT_TIME;
if_in_ram_update_sd (&th, dir) ;
pop_journal_writer(windex) ;
journal_end(&th, dir->i_sb, jbegin_count) ;
call_journal_end = 0 ;
d_delete(dentry);
retval = 0;
end_unlink:
pathrelse (&path);
pop_journal_writer(windex) ;
if (call_journal_end)
journal_end(&th, dir->i_sb, jbegin_count) ;
return retval;
}
int reiserfs_symlink (struct inode * dir, struct dentry * dentry, const char * symname)
{
struct inode * inode;
struct path path_to_entry;
struct reiserfs_dir_entry de;
int error;
int windex ;
struct reiserfs_transaction_handle th ;
int jbegin_count = JOURNAL_PER_BALANCE_CNT * 3;
int err;
init_path (&path_to_entry);
if (strlen (symname) + 1 + SD_SIZE > MAX_ITEM_LEN (dir->i_sb->s_blocksize)) {
return -ENAMETOOLONG;
}
inode = get_empty_inode() ;
if (!inode) {
return -ENOSPC ;
}
journal_begin(&th, dir->i_sb, jbegin_count) ;
windex = push_journal_writer("reiserfs_symlink") ;
inode = reiserfs_new_inode (&th, dir, S_IFLNK, symname, dentry, inode, &err);
if (inode == 0) {
pop_journal_writer(windex) ;
journal_end(&th, dir->i_sb, jbegin_count) ;
return err;
}
reiserfs_update_inode_transaction(inode) ;
reiserfs_update_inode_transaction(dir) ;
inode->i_op = &reiserfs_symlink_inode_operations;
inode->i_size = strlen (symname);
inode->i_mode = S_IFLNK | 0777;
if_in_ram_update_sd (&th, inode);
de.de_gen_number_bit_string = 0;
if (reiserfs_find_entry (dir, dentry->d_name.name, dentry->d_name.len, &path_to_entry, &de) == POSITION_FOUND) {
pathrelse (&path_to_entry);
inode->i_nlink--;
if_in_ram_update_sd (&th, inode);
pop_journal_writer(windex) ;
journal_end(&th, dir->i_sb, jbegin_count) ;
iput (inode);
return -EEXIST;
}
pathrelse (&path_to_entry);
error = reiserfs_add_entry (&th, dir, dentry->d_name.name, dentry->d_name.len, INODE_PKEY (inode), &de, 1);
if (error) {
inode->i_nlink--;
if_in_ram_update_sd (&th, inode);
pop_journal_writer(windex) ;
journal_end(&th, dir->i_sb, jbegin_count) ;
iput (inode);
return error;
}
if_in_ram_update_sd (&th, dir);
d_instantiate(dentry, inode);
pop_journal_writer(windex) ;
journal_end(&th, dir->i_sb, jbegin_count) ;
return 0;
}
static int reiserfs_rmdir(struct inode *dir, struct dentry *dentry)
{
int retval, err;
struct inode *inode;
struct reiserfs_transaction_handle th;
int jbegin_count;
INITIALIZE_PATH(path);
struct reiserfs_dir_entry de;
/* we will be doing 2 balancings and update 2 stat data, we change quotas
* of the owner of the directory and of the owner of the parent directory.
* The quota structure is possibly deleted only on last iput => outside
* of this transaction */
jbegin_count =
JOURNAL_PER_BALANCE_CNT * 2 + 2 +
4 * REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb);
dquot_initialize(dir);
reiserfs_write_lock(dir->i_sb);
retval = journal_begin(&th, dir->i_sb, jbegin_count);
if (retval)
goto out_rmdir;
de.de_gen_number_bit_string = NULL;
if ((retval =
reiserfs_find_entry(dir, dentry->d_name.name, dentry->d_name.len,
&path, &de)) == NAME_NOT_FOUND) {
retval = -ENOENT;
goto end_rmdir;
} else if (retval == IO_ERROR) {
retval = -EIO;
goto end_rmdir;
}
inode = dentry->d_inode;
reiserfs_update_inode_transaction(inode);
reiserfs_update_inode_transaction(dir);
if (de.de_objectid != inode->i_ino) {
// FIXME: compare key of an object and a key found in the
// entry
retval = -EIO;
goto end_rmdir;
}
if (!reiserfs_empty_dir(inode)) {
retval = -ENOTEMPTY;
goto end_rmdir;
}
/* cut entry from dir directory */
retval = reiserfs_cut_from_item(&th, &path, &(de.de_entry_key), dir, NULL, /* page */
0 /*new file size - not used here */ );
if (retval < 0)
goto end_rmdir;
if (inode->i_nlink != 2 && inode->i_nlink != 1)
reiserfs_error(inode->i_sb, "reiserfs-7040",
"empty directory has nlink != 2 (%d)",
inode->i_nlink);
clear_nlink(inode);
inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC;
reiserfs_update_sd(&th, inode);
DEC_DIR_INODE_NLINK(dir)
dir->i_size -= (DEH_SIZE + de.de_entrylen);
reiserfs_update_sd(&th, dir);
/* prevent empty directory from getting lost */
add_save_link(&th, inode, 0 /* not truncate */ );
retval = journal_end(&th, dir->i_sb, jbegin_count);
reiserfs_check_path(&path);
out_rmdir:
reiserfs_write_unlock(dir->i_sb);
return retval;
end_rmdir:
/* we must release path, because we did not call
reiserfs_cut_from_item, or reiserfs_cut_from_item does not
release path if operation was not complete */
pathrelse(&path);
err = journal_end(&th, dir->i_sb, jbegin_count);
reiserfs_write_unlock(dir->i_sb);
return err ? err : retval;
}
static int reiserfs_rmdir (struct inode * dir, struct dentry *dentry)
{
int retval;
struct inode * inode;
struct reiserfs_transaction_handle th ;
int jbegin_count;
INITIALIZE_PATH (path);
struct reiserfs_dir_entry de;
/* we will be doing 2 balancings and update 2 stat data */
jbegin_count = JOURNAL_PER_BALANCE_CNT * 2 + 2;
reiserfs_write_lock(dir->i_sb);
journal_begin(&th, dir->i_sb, jbegin_count) ;
de.de_gen_number_bit_string = 0;
if ( (retval = reiserfs_find_entry (dir, dentry->d_name.name, dentry->d_name.len, &path, &de)) == NAME_NOT_FOUND) {
retval = -ENOENT;
goto end_rmdir;
} else if ( retval == IO_ERROR) {
retval = -EIO;
goto end_rmdir;
}
inode = dentry->d_inode;
reiserfs_update_inode_transaction(inode) ;
reiserfs_update_inode_transaction(dir) ;
if (de.de_objectid != inode->i_ino) {
// FIXME: compare key of an object and a key found in the
// entry
retval = -EIO;
goto end_rmdir;
}
if (!reiserfs_empty_dir(inode)) {
retval = -ENOTEMPTY;
goto end_rmdir;
}
/* cut entry from dir directory */
retval = reiserfs_cut_from_item (&th, &path, &(de.de_entry_key), dir,
NULL, /* page */
0/*new file size - not used here*/);
if (retval < 0)
goto end_rmdir;
if ( inode->i_nlink != 2 && inode->i_nlink != 1 )
reiserfs_warning (inode->i_sb, "%s: empty directory has nlink "
"!= 2 (%d)", __FUNCTION__, inode->i_nlink);
inode->i_nlink = 0;
inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME;
reiserfs_update_sd (&th, inode);
DEC_DIR_INODE_NLINK(dir)
dir->i_size -= (DEH_SIZE + de.de_entrylen);
reiserfs_update_sd (&th, dir);
/* prevent empty directory from getting lost */
add_save_link (&th, inode, 0/* not truncate */);
journal_end(&th, dir->i_sb, jbegin_count) ;
reiserfs_check_path(&path) ;
reiserfs_write_unlock(dir->i_sb);
return 0;
end_rmdir:
/* we must release path, because we did not call
reiserfs_cut_from_item, or reiserfs_cut_from_item does not
release path if operation was not complete */
pathrelse (&path);
journal_end(&th, dir->i_sb, jbegin_count) ;
reiserfs_write_unlock(dir->i_sb);
return retval;
}
static int reiserfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
dev_t rdev)
{
int retval;
struct inode *inode;
struct reiserfs_transaction_handle th;
struct reiserfs_security_handle security;
/* 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(dir->i_sb) +
REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb));
if (!new_valid_dev(rdev))
return -EINVAL;
dquot_initialize(dir);
if (!(inode = new_inode(dir->i_sb))) {
return -ENOMEM;
}
new_inode_init(inode, dir, mode);
jbegin_count += reiserfs_cache_default_acl(dir);
retval = reiserfs_security_init(dir, inode, &dentry->d_name, &security);
if (retval < 0) {
drop_new_inode(inode);
return retval;
}
jbegin_count += retval;
reiserfs_write_lock(dir->i_sb);
retval = journal_begin(&th, dir->i_sb, jbegin_count);
if (retval) {
drop_new_inode(inode);
goto out_failed;
}
retval =
reiserfs_new_inode(&th, dir, mode, NULL, 0 /*i_size */ , dentry,
inode, &security);
if (retval) {
goto out_failed;
}
inode->i_op = &reiserfs_special_inode_operations;
init_special_inode(inode, inode->i_mode, rdev);
//FIXME: needed for block and char devices only
reiserfs_update_sd(&th, inode);
reiserfs_update_inode_transaction(inode);
reiserfs_update_inode_transaction(dir);
retval =
reiserfs_add_entry(&th, 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, 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, dir->i_sb, jbegin_count);
out_failed:
reiserfs_write_unlock(dir->i_sb);
return retval;
}
/*
* process, that is going to call fix_nodes/do_balance must hold only
* one path. If it holds 2 or more, it can get into endless waiting in
* get_empty_nodes or its clones
*/
static int reiserfs_rename(struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry)
{
int retval;
INITIALIZE_PATH(old_entry_path);
INITIALIZE_PATH(new_entry_path);
INITIALIZE_PATH(dot_dot_entry_path);
struct item_head new_entry_ih, old_entry_ih, dot_dot_ih;
struct reiserfs_dir_entry old_de, new_de, dot_dot_de;
struct inode *old_inode, *new_dentry_inode;
struct reiserfs_transaction_handle th;
int jbegin_count;
umode_t old_inode_mode;
unsigned long savelink = 1;
struct timespec ctime;
/* three balancings: (1) old name removal, (2) new name insertion
and (3) maybe "save" link insertion
stat data updates: (1) old directory,
(2) new directory and (3) maybe old object stat data (when it is
directory) and (4) maybe stat data of object to which new entry
pointed initially and (5) maybe block containing ".." of
renamed directory
quota updates: two parent directories */
jbegin_count =
JOURNAL_PER_BALANCE_CNT * 3 + 5 +
4 * REISERFS_QUOTA_TRANS_BLOCKS(old_dir->i_sb);
dquot_initialize(old_dir);
dquot_initialize(new_dir);
old_inode = old_dentry->d_inode;
new_dentry_inode = new_dentry->d_inode;
// make sure, that oldname still exists and points to an object we
// are going to rename
old_de.de_gen_number_bit_string = NULL;
reiserfs_write_lock(old_dir->i_sb);
retval =
reiserfs_find_entry(old_dir, old_dentry->d_name.name,
old_dentry->d_name.len, &old_entry_path,
&old_de);
pathrelse(&old_entry_path);
if (retval == IO_ERROR) {
reiserfs_write_unlock(old_dir->i_sb);
return -EIO;
}
if (retval != NAME_FOUND || old_de.de_objectid != old_inode->i_ino) {
reiserfs_write_unlock(old_dir->i_sb);
return -ENOENT;
}
old_inode_mode = old_inode->i_mode;
if (S_ISDIR(old_inode_mode)) {
// make sure, that directory being renamed has correct ".."
// and that its new parent directory has not too many links
// already
if (new_dentry_inode) {
if (!reiserfs_empty_dir(new_dentry_inode)) {
reiserfs_write_unlock(old_dir->i_sb);
return -ENOTEMPTY;
}
}
/* directory is renamed, its parent directory will be changed,
** so find ".." entry
*/
dot_dot_de.de_gen_number_bit_string = NULL;
retval =
reiserfs_find_entry(old_inode, "..", 2, &dot_dot_entry_path,
&dot_dot_de);
pathrelse(&dot_dot_entry_path);
if (retval != NAME_FOUND) {
reiserfs_write_unlock(old_dir->i_sb);
return -EIO;
}
/* inode number of .. must equal old_dir->i_ino */
if (dot_dot_de.de_objectid != old_dir->i_ino) {
reiserfs_write_unlock(old_dir->i_sb);
return -EIO;
}
}
retval = journal_begin(&th, old_dir->i_sb, jbegin_count);
if (retval) {
reiserfs_write_unlock(old_dir->i_sb);
return retval;
}
/* add new entry (or find the existing one) */
retval =
reiserfs_add_entry(&th, new_dir, new_dentry->d_name.name,
new_dentry->d_name.len, old_inode, 0);
if (retval == -EEXIST) {
if (!new_dentry_inode) {
reiserfs_panic(old_dir->i_sb, "vs-7050",
"new entry is found, new inode == 0");
}
} else if (retval) {
int err = journal_end(&th, old_dir->i_sb, jbegin_count);
reiserfs_write_unlock(old_dir->i_sb);
return err ? err : retval;
}
reiserfs_update_inode_transaction(old_dir);
reiserfs_update_inode_transaction(new_dir);
/* this makes it so an fsync on an open fd for the old name will
** commit the rename operation
*/
reiserfs_update_inode_transaction(old_inode);
if (new_dentry_inode)
reiserfs_update_inode_transaction(new_dentry_inode);
while (1) {
// look for old name using corresponding entry key (found by reiserfs_find_entry)
if ((retval =
search_by_entry_key(new_dir->i_sb, &old_de.de_entry_key,
&old_entry_path,
&old_de)) != NAME_FOUND) {
pathrelse(&old_entry_path);
journal_end(&th, old_dir->i_sb, jbegin_count);
reiserfs_write_unlock(old_dir->i_sb);
return -EIO;
}
copy_item_head(&old_entry_ih, get_ih(&old_entry_path));
reiserfs_prepare_for_journal(old_inode->i_sb, old_de.de_bh, 1);
// look for new name by reiserfs_find_entry
new_de.de_gen_number_bit_string = NULL;
retval =
reiserfs_find_entry(new_dir, new_dentry->d_name.name,
new_dentry->d_name.len, &new_entry_path,
&new_de);
// reiserfs_add_entry should not return IO_ERROR, because it is called with essentially same parameters from
// reiserfs_add_entry above, and we'll catch any i/o errors before we get here.
if (retval != NAME_FOUND_INVISIBLE && retval != NAME_FOUND) {
pathrelse(&new_entry_path);
pathrelse(&old_entry_path);
journal_end(&th, old_dir->i_sb, jbegin_count);
reiserfs_write_unlock(old_dir->i_sb);
return -EIO;
}
copy_item_head(&new_entry_ih, get_ih(&new_entry_path));
reiserfs_prepare_for_journal(old_inode->i_sb, new_de.de_bh, 1);
if (S_ISDIR(old_inode->i_mode)) {
if ((retval =
search_by_entry_key(new_dir->i_sb,
&dot_dot_de.de_entry_key,
&dot_dot_entry_path,
&dot_dot_de)) != NAME_FOUND) {
pathrelse(&dot_dot_entry_path);
pathrelse(&new_entry_path);
pathrelse(&old_entry_path);
journal_end(&th, old_dir->i_sb, jbegin_count);
reiserfs_write_unlock(old_dir->i_sb);
return -EIO;
}
copy_item_head(&dot_dot_ih,
get_ih(&dot_dot_entry_path));
// node containing ".." gets into transaction
reiserfs_prepare_for_journal(old_inode->i_sb,
dot_dot_de.de_bh, 1);
}
/* we should check seals here, not do
this stuff, yes? Then, having
gathered everything into RAM we
should lock the buffers, yes? -Hans */
/* probably. our rename needs to hold more
** than one path at once. The seals would
** have to be written to deal with multi-path
** issues -chris
*/
/* sanity checking before doing the rename - avoid races many
** of the above checks could have scheduled. We have to be
** sure our items haven't been shifted by another process.
*/
if (item_moved(&new_entry_ih, &new_entry_path) ||
!entry_points_to_object(new_dentry->d_name.name,
new_dentry->d_name.len,
&new_de, new_dentry_inode) ||
item_moved(&old_entry_ih, &old_entry_path) ||
!entry_points_to_object(old_dentry->d_name.name,
old_dentry->d_name.len,
&old_de, old_inode)) {
reiserfs_restore_prepared_buffer(old_inode->i_sb,
new_de.de_bh);
reiserfs_restore_prepared_buffer(old_inode->i_sb,
old_de.de_bh);
if (S_ISDIR(old_inode_mode))
reiserfs_restore_prepared_buffer(old_inode->
i_sb,
dot_dot_de.
de_bh);
continue;
}
if (S_ISDIR(old_inode_mode)) {
if (item_moved(&dot_dot_ih, &dot_dot_entry_path) ||
!entry_points_to_object("..", 2, &dot_dot_de,
old_dir)) {
reiserfs_restore_prepared_buffer(old_inode->
i_sb,
old_de.de_bh);
reiserfs_restore_prepared_buffer(old_inode->
i_sb,
new_de.de_bh);
reiserfs_restore_prepared_buffer(old_inode->
i_sb,
dot_dot_de.
de_bh);
continue;
}
}
RFALSE(S_ISDIR(old_inode_mode) &&
!buffer_journal_prepared(dot_dot_de.de_bh), "");
break;
}
/* ok, all the changes can be done in one fell swoop when we
have claimed all the buffers needed. */
mark_de_visible(new_de.de_deh + new_de.de_entry_num);
set_ino_in_dir_entry(&new_de, INODE_PKEY(old_inode));
journal_mark_dirty(&th, old_dir->i_sb, new_de.de_bh);
mark_de_hidden(old_de.de_deh + old_de.de_entry_num);
journal_mark_dirty(&th, old_dir->i_sb, old_de.de_bh);
ctime = CURRENT_TIME_SEC;
old_dir->i_ctime = old_dir->i_mtime = ctime;
new_dir->i_ctime = new_dir->i_mtime = ctime;
/* thanks to Alex Adriaanse <*****@*****.**> for patch which adds ctime update of
renamed object */
old_inode->i_ctime = ctime;
if (new_dentry_inode) {
// adjust link number of the victim
if (S_ISDIR(new_dentry_inode->i_mode)) {
clear_nlink(new_dentry_inode);
} else {
drop_nlink(new_dentry_inode);
}
new_dentry_inode->i_ctime = ctime;
savelink = new_dentry_inode->i_nlink;
}
if (S_ISDIR(old_inode_mode)) {
/* adjust ".." of renamed directory */
set_ino_in_dir_entry(&dot_dot_de, INODE_PKEY(new_dir));
journal_mark_dirty(&th, new_dir->i_sb, dot_dot_de.de_bh);
if (!new_dentry_inode)
/* there (in new_dir) was no directory, so it got new link
(".." of renamed directory) */
INC_DIR_INODE_NLINK(new_dir);
/* old directory lost one link - ".. " of renamed directory */
DEC_DIR_INODE_NLINK(old_dir);
}
// looks like in 2.3.99pre3 brelse is atomic. so we can use pathrelse
pathrelse(&new_entry_path);
pathrelse(&dot_dot_entry_path);
// FIXME: this reiserfs_cut_from_item's return value may screw up
// anybody, but it will panic if will not be able to find the
// entry. This needs one more clean up
if (reiserfs_cut_from_item
(&th, &old_entry_path, &(old_de.de_entry_key), old_dir, NULL,
0) < 0)
reiserfs_error(old_dir->i_sb, "vs-7060",
"couldn't not cut old name. Fsck later?");
old_dir->i_size -= DEH_SIZE + old_de.de_entrylen;
reiserfs_update_sd(&th, old_dir);
reiserfs_update_sd(&th, new_dir);
reiserfs_update_sd(&th, old_inode);
if (new_dentry_inode) {
if (savelink == 0)
add_save_link(&th, new_dentry_inode,
0 /* not truncate */ );
reiserfs_update_sd(&th, new_dentry_inode);
}
retval = journal_end(&th, old_dir->i_sb, jbegin_count);
reiserfs_write_unlock(old_dir->i_sb);
return retval;
}
/* Allocates blocks for a file to fulfil write request.
Maps all unmapped but prepared pages from the list.
Updates metadata with newly allocated blocknumbers as needed */
int reiserfs_allocate_blocks_for_region(
struct reiserfs_transaction_handle *th,
struct inode *inode, /* Inode we work with */
loff_t pos, /* Writing position */
int num_pages, /* number of pages write going
to touch */
int write_bytes, /* amount of bytes to write */
struct page **prepared_pages, /* array of
prepared pages
*/
int blocks_to_allocate /* Amount of blocks we
need to allocate to
fit the data into file
*/
)
{
struct cpu_key key; // cpu key of item that we are going to deal with
struct item_head *ih; // pointer to item head that we are going to deal with
struct buffer_head *bh; // Buffer head that contains items that we are going to deal with
__u32 * item; // pointer to item we are going to deal with
INITIALIZE_PATH(path); // path to item, that we are going to deal with.
b_blocknr_t *allocated_blocks; // Pointer to a place where allocated blocknumbers would be stored.
reiserfs_blocknr_hint_t hint; // hint structure for block allocator.
size_t res; // return value of various functions that we call.
int curr_block; // current block used to keep track of unmapped blocks.
int i; // loop counter
int itempos; // position in item
unsigned int from = (pos & (PAGE_CACHE_SIZE - 1)); // writing position in
// first page
unsigned int to = ((pos + write_bytes - 1) & (PAGE_CACHE_SIZE - 1)) + 1; /* last modified byte offset in last page */
__u64 hole_size ; // amount of blocks for a file hole, if it needed to be created.
int modifying_this_item = 0; // Flag for items traversal code to keep track
// of the fact that we already prepared
// current block for journal
int will_prealloc = 0;
RFALSE(!blocks_to_allocate, "green-9004: tried to allocate zero blocks?");
/* only preallocate if this is a small write */
if (REISERFS_I(inode)->i_prealloc_count ||
(!(write_bytes & (inode->i_sb->s_blocksize -1)) &&
blocks_to_allocate <
REISERFS_SB(inode->i_sb)->s_alloc_options.preallocsize))
will_prealloc = REISERFS_SB(inode->i_sb)->s_alloc_options.preallocsize;
allocated_blocks = kmalloc((blocks_to_allocate + will_prealloc) *
sizeof(b_blocknr_t), GFP_NOFS);
/* First we compose a key to point at the writing position, we want to do
that outside of any locking region. */
make_cpu_key (&key, inode, pos+1, TYPE_ANY, 3/*key length*/);
/* If we came here, it means we absolutely need to open a transaction,
since we need to allocate some blocks */
reiserfs_write_lock(inode->i_sb); // Journaling stuff and we need that.
journal_begin(th, inode->i_sb, JOURNAL_PER_BALANCE_CNT * 3 + 1); // Wish I know if this number enough
reiserfs_update_inode_transaction(inode) ;
/* Look for the in-tree position of our write, need path for block allocator */
res = search_for_position_by_key(inode->i_sb, &key, &path);
if ( res == IO_ERROR ) {
res = -EIO;
goto error_exit;
}
/* Allocate blocks */
/* First fill in "hint" structure for block allocator */
hint.th = th; // transaction handle.
hint.path = &path; // Path, so that block allocator can determine packing locality or whatever it needs to determine.
hint.inode = inode; // Inode is needed by block allocator too.
hint.search_start = 0; // We have no hint on where to search free blocks for block allocator.
hint.key = key.on_disk_key; // on disk key of file.
hint.block = inode->i_blocks>>(inode->i_sb->s_blocksize_bits-9); // Number of disk blocks this file occupies already.
hint.formatted_node = 0; // We are allocating blocks for unformatted node.
hint.preallocate = will_prealloc;
/* Call block allocator to allocate blocks */
res = reiserfs_allocate_blocknrs(&hint, allocated_blocks, blocks_to_allocate, blocks_to_allocate);
if ( res != CARRY_ON ) {
if ( res == NO_DISK_SPACE ) {
/* We flush the transaction in case of no space. This way some
blocks might become free */
SB_JOURNAL(inode->i_sb)->j_must_wait = 1;
restart_transaction(th, inode, &path);
/* We might have scheduled, so search again */
res = search_for_position_by_key(inode->i_sb, &key, &path);
if ( res == IO_ERROR ) {
res = -EIO;
goto error_exit;
}
/* update changed info for hint structure. */
res = reiserfs_allocate_blocknrs(&hint, allocated_blocks, blocks_to_allocate, blocks_to_allocate);
if ( res != CARRY_ON ) {
res = -ENOSPC;
pathrelse(&path);
goto error_exit;
}
} else {
res = -ENOSPC;
pathrelse(&path);
goto error_exit;
}
}
#ifdef __BIG_ENDIAN
// Too bad, I have not found any way to convert a given region from
// cpu format to little endian format
{
int i;
for ( i = 0; i < blocks_to_allocate ; i++)
allocated_blocks[i]=cpu_to_le32(allocated_blocks[i]);
}
#endif
/* Blocks allocating well might have scheduled and tree might have changed,
let's search the tree again */
/* find where in the tree our write should go */
res = search_for_position_by_key(inode->i_sb, &key, &path);
if ( res == IO_ERROR ) {
res = -EIO;
goto error_exit_free_blocks;
}
bh = get_last_bh( &path ); // Get a bufferhead for last element in path.
ih = get_ih( &path ); // Get a pointer to last item head in path.
item = get_item( &path ); // Get a pointer to last item in path
/* Let's see what we have found */
if ( res != POSITION_FOUND ) { /* position not found, this means that we
might need to append file with holes
first */
// Since we are writing past the file's end, we need to find out if
// there is a hole that needs to be inserted before our writing
// position, and how many blocks it is going to cover (we need to
// populate pointers to file blocks representing the hole with zeros)
{
int item_offset = 1;
/*
* if ih is stat data, its offset is 0 and we don't want to
* add 1 to pos in the hole_size calculation
*/
if (is_statdata_le_ih(ih))
item_offset = 0;
hole_size = (pos + item_offset -
(le_key_k_offset( get_inode_item_key_version(inode),
&(ih->ih_key)) +
op_bytes_number(ih, inode->i_sb->s_blocksize))) >>
inode->i_sb->s_blocksize_bits;
}
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;
}
static int reiserfs_unlink (struct inode * dir, struct dentry *dentry)
{
int retval;
struct inode * inode;
struct reiserfs_dir_entry de;
INITIALIZE_PATH (path);
struct reiserfs_transaction_handle th ;
int jbegin_count;
unsigned long savelink;
inode = dentry->d_inode;
/* in this transaction we can be doing at max two balancings and update
two stat datas */
jbegin_count = JOURNAL_PER_BALANCE_CNT * 2 + 2;
reiserfs_write_lock(dir->i_sb);
journal_begin(&th, dir->i_sb, jbegin_count) ;
de.de_gen_number_bit_string = 0;
if ( (retval = reiserfs_find_entry (dir, dentry->d_name.name, dentry->d_name.len, &path, &de)) == NAME_NOT_FOUND) {
retval = -ENOENT;
goto end_unlink;
} else if (retval == IO_ERROR) {
retval = -EIO;
goto end_unlink;
}
reiserfs_update_inode_transaction(inode) ;
reiserfs_update_inode_transaction(dir) ;
if (de.de_objectid != inode->i_ino) {
// FIXME: compare key of an object and a key found in the
// entry
retval = -EIO;
goto end_unlink;
}
if (!inode->i_nlink) {
reiserfs_warning (inode->i_sb, "%s: deleting nonexistent file "
"(%s:%lu), %d", __FUNCTION__,
reiserfs_bdevname (inode->i_sb), inode->i_ino,
inode->i_nlink);
inode->i_nlink = 1;
}
inode->i_nlink--;
/*
* we schedule before doing the add_save_link call, save the link
* count so we don't race
*/
savelink = inode->i_nlink;
retval = reiserfs_cut_from_item (&th, &path, &(de.de_entry_key), dir, NULL, 0);
if (retval < 0) {
inode->i_nlink++;
goto end_unlink;
}
inode->i_ctime = CURRENT_TIME;
reiserfs_update_sd (&th, inode);
dir->i_size -= (de.de_entrylen + DEH_SIZE);
dir->i_ctime = dir->i_mtime = CURRENT_TIME;
reiserfs_update_sd (&th, dir);
if (!savelink)
/* prevent file from getting lost */
add_save_link (&th, inode, 0/* not truncate */);
journal_end(&th, dir->i_sb, jbegin_count) ;
reiserfs_check_path(&path) ;
reiserfs_write_unlock(dir->i_sb);
return 0;
end_unlink:
pathrelse (&path);
journal_end(&th, dir->i_sb, jbegin_count) ;
reiserfs_check_path(&path) ;
reiserfs_write_unlock(dir->i_sb);
return retval;
}
static int reiserfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
struct nameidata *nd)
{
int retval;
struct inode *inode;
/* We need blocks for transaction + (user+group)*(quotas for new inode + update of quota for directory owner) */
int jbegin_count =
JOURNAL_PER_BALANCE_CNT * 2 +
2 * (REISERFS_QUOTA_INIT_BLOCKS(dir->i_sb) +
REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb));
struct reiserfs_transaction_handle th;
struct reiserfs_security_handle security;
dquot_initialize(dir);
if (!(inode = new_inode(dir->i_sb))) {
return -ENOMEM;
}
new_inode_init(inode, dir, mode);
jbegin_count += reiserfs_cache_default_acl(dir);
retval = reiserfs_security_init(dir, inode, &dentry->d_name, &security);
if (retval < 0) {
drop_new_inode(inode);
return retval;
}
jbegin_count += retval;
reiserfs_write_lock(dir->i_sb);
retval = journal_begin(&th, dir->i_sb, jbegin_count);
if (retval) {
drop_new_inode(inode);
goto out_failed;
}
retval =
reiserfs_new_inode(&th, dir, mode, NULL, 0 /*i_size */ , dentry,
inode, &security);
if (retval)
goto out_failed;
inode->i_op = &reiserfs_file_inode_operations;
inode->i_fop = &reiserfs_file_operations;
inode->i_mapping->a_ops = &reiserfs_address_space_operations;
retval =
reiserfs_add_entry(&th, 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, dir->i_sb, jbegin_count);
if (err)
retval = err;
unlock_new_inode(inode);
iput(inode);
goto out_failed;
}
reiserfs_update_inode_transaction(inode);
reiserfs_update_inode_transaction(dir);
unlock_new_inode(inode);
d_instantiate(dentry, inode);
retval = journal_end(&th, dir->i_sb, jbegin_count);
out_failed:
reiserfs_write_unlock(dir->i_sb);
return retval;
}
int reiserfs_mknod (struct inode * dir, struct dentry *dentry, int mode, int rdev)
{
int error;
struct inode * inode;
struct path path_to_entry;
struct reiserfs_dir_entry de;
int windex ;
struct reiserfs_transaction_handle th ;
int jbegin_count = JOURNAL_PER_BALANCE_CNT * 3;
int err;
if (!dir)
return -ENOENT;
init_path (&path_to_entry);
inode = get_empty_inode() ;
if (!inode) {
return -ENOSPC ;
}
journal_begin(&th, dir->i_sb, jbegin_count) ;
windex = push_journal_writer("reiserfs_mknod") ;
de.de_gen_number_bit_string = 0;
if (reiserfs_find_entry (dir, dentry->d_name.name, dentry->d_name.len, &path_to_entry, &de) == POSITION_FOUND) {
pathrelse ( &path_to_entry);
pop_journal_writer(windex) ;
journal_end(&th, dir->i_sb, jbegin_count) ;
iput(inode) ;
return -EEXIST;
}
pathrelse ( &path_to_entry);
inode = reiserfs_new_inode (&th, dir, mode, 0, dentry, inode, &err);
if (!inode) {
pop_journal_writer(windex) ;
journal_end(&th, dir->i_sb, jbegin_count) ;
return err;
}
reiserfs_update_inode_transaction(inode) ;
reiserfs_update_inode_transaction(dir) ;
inode->i_uid = current->fsuid;
inode->i_mode = mode;
inode->i_op = NULL;
if (S_ISREG(inode->i_mode))
inode->i_op = &reiserfs_file_inode_operations;
else if (S_ISDIR(inode->i_mode)) {
inode->i_op = &reiserfs_dir_inode_operations;
if (dir->i_mode & S_ISGID)
inode->i_mode |= S_ISGID;
}
else if (S_ISLNK(inode->i_mode))
inode->i_op = &reiserfs_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);
if (S_ISBLK(mode) || S_ISCHR(mode))
inode->i_rdev = to_kdev_t(rdev);
if_in_ram_update_sd (&th, inode);
error = reiserfs_add_entry (&th, dir, dentry->d_name.name, dentry->d_name.len, INODE_PKEY (inode), &de, 1);
if (error) {
inode->i_nlink--;
if_in_ram_update_sd (&th, inode);
pop_journal_writer(windex) ;
journal_end(&th, dir->i_sb, jbegin_count) ;
iput (inode);
return error;
}
if_in_ram_update_sd (&th, dir);
d_instantiate(dentry, inode);
pop_journal_writer(windex) ;
journal_end(&th, dir->i_sb, jbegin_count) ;
return 0;
}
static int reiserfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
{
int retval;
struct inode *inode;
struct reiserfs_transaction_handle th;
struct reiserfs_security_handle security;
int lock_depth;
/* 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(dir->i_sb) +
REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb));
dquot_initialize(dir);
#ifdef DISPLACE_NEW_PACKING_LOCALITIES
/* set flag that new packing locality created and new blocks for the content * of that directory are not displaced yet */
REISERFS_I(dir)->new_packing_locality = 1;
#endif
mode = S_IFDIR | mode;
if (!(inode = new_inode(dir->i_sb))) {
return -ENOMEM;
}
new_inode_init(inode, dir, mode);
jbegin_count += reiserfs_cache_default_acl(dir);
retval = reiserfs_security_init(dir, inode, &dentry->d_name, &security);
if (retval < 0) {
drop_new_inode(inode);
return retval;
}
jbegin_count += retval;
lock_depth = reiserfs_write_lock_once(dir->i_sb);
retval = journal_begin(&th, dir->i_sb, jbegin_count);
if (retval) {
drop_new_inode(inode);
goto out_failed;
}
/* inc the link count now, so another writer doesn't overflow it while
** we sleep later on.
*/
INC_DIR_INODE_NLINK(dir)
retval = reiserfs_new_inode(&th, dir, mode, NULL /*symlink */ ,
old_format_only(dir->i_sb) ?
EMPTY_DIR_SIZE_V1 : EMPTY_DIR_SIZE,
dentry, inode, &security);
if (retval) {
DEC_DIR_INODE_NLINK(dir)
goto out_failed;
}
reiserfs_update_inode_transaction(inode);
reiserfs_update_inode_transaction(dir);
inode->i_op = &reiserfs_dir_inode_operations;
inode->i_fop = &reiserfs_dir_operations;
// note, _this_ add_entry will not update dir's stat data
retval =
reiserfs_add_entry(&th, dir, dentry->d_name.name,
dentry->d_name.len, inode, 1 /*visible */ );
if (retval) {
int err;
clear_nlink(inode);
DEC_DIR_INODE_NLINK(dir);
reiserfs_update_sd(&th, inode);
err = journal_end(&th, dir->i_sb, jbegin_count);
if (err)
retval = err;
unlock_new_inode(inode);
iput(inode);
goto out_failed;
}
// the above add_entry did not update dir's stat data
reiserfs_update_sd(&th, dir);
unlock_new_inode(inode);
d_instantiate(dentry, inode);
retval = journal_end(&th, dir->i_sb, jbegin_count);
out_failed:
reiserfs_write_unlock_once(dir->i_sb, lock_depth);
return retval;
}
int reiserfs_mkdir (struct inode * dir, struct dentry *dentry, int mode)
{
int error;
struct inode * inode;
struct path path_to_entry;
struct reiserfs_dir_entry de;
int windex ;
struct reiserfs_transaction_handle th ;
int jbegin_count = JOURNAL_PER_BALANCE_CNT * 3;
int err;
init_path (&path_to_entry);
if (!dir || !dir->i_sb) {
return -EINVAL;
}
inode = get_empty_inode() ;
if (!inode) {
return -ENOSPC ;
}
journal_begin(&th, dir->i_sb, jbegin_count) ;
windex = push_journal_writer("reiserfs_mkdir") ;
de.de_gen_number_bit_string = 0;
if (reiserfs_find_entry (dir, dentry->d_name.name, dentry->d_name.len, &path_to_entry, &de) == POSITION_FOUND) {
pathrelse (&path_to_entry);
pop_journal_writer(windex) ;
journal_end(&th, dir->i_sb, jbegin_count) ;
iput(inode) ;
return -EEXIST;
}
pathrelse (&path_to_entry);
if (dir->i_nlink >= REISERFS_LINK_MAX) {
pop_journal_writer(windex) ;
journal_end(&th, dir->i_sb, jbegin_count) ;
iput(inode) ;
return -EMLINK;
}
mode = S_IFDIR | (mode & 0777 & ~current->fs->umask);
if (dir->i_mode & S_ISGID)
mode |= S_ISGID;
inode = reiserfs_new_inode (&th, dir, mode, 0, dentry, inode, &err);
if (!inode) {
pop_journal_writer(windex) ;
journal_end(&th, dir->i_sb, jbegin_count) ;
return err;
}
reiserfs_update_inode_transaction(inode) ;
reiserfs_update_inode_transaction(dir) ;
inode->i_op = &reiserfs_dir_inode_operations;
/* new inode and stat data are uptodate. Inode is clean. */
error = reiserfs_add_entry (&th, dir, dentry->d_name.name, dentry->d_name.len, INODE_PKEY (inode), &de, 1);
if (error) {
inode->i_nlink = 0;
if_in_ram_update_sd (&th, inode);
pop_journal_writer(windex) ;
journal_end(&th, dir->i_sb, jbegin_count) ;
iput (inode);
return error;
}
/* update dir inode, reiserfs_add_entry does not do that */
dir->i_nlink ++;
if_in_ram_update_sd (&th, dir);
d_instantiate(dentry, inode);
pop_journal_writer(windex) ;
journal_end(&th, dir->i_sb, jbegin_count) ;
return 0;
}
static int reiserfs_unlink(struct inode *dir, struct dentry *dentry)
{
int retval, err;
struct inode *inode;
struct reiserfs_dir_entry de;
INITIALIZE_PATH(path);
struct reiserfs_transaction_handle th;
int jbegin_count;
unsigned long savelink;
int depth;
dquot_initialize(dir);
inode = dentry->d_inode;
/* in this transaction we can be doing at max two balancings and update
* two stat datas, we change quotas of the owner of the directory and of
* the owner of the parent directory. The quota structure is possibly
* deleted only on iput => outside of this transaction */
jbegin_count =
JOURNAL_PER_BALANCE_CNT * 2 + 2 +
4 * REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb);
depth = reiserfs_write_lock_once(dir->i_sb);
retval = journal_begin(&th, dir->i_sb, jbegin_count);
if (retval)
goto out_unlink;
de.de_gen_number_bit_string = NULL;
if ((retval =
reiserfs_find_entry(dir, dentry->d_name.name, dentry->d_name.len,
&path, &de)) == NAME_NOT_FOUND) {
retval = -ENOENT;
goto end_unlink;
} else if (retval == IO_ERROR) {
retval = -EIO;
goto end_unlink;
}
reiserfs_update_inode_transaction(inode);
reiserfs_update_inode_transaction(dir);
if (de.de_objectid != inode->i_ino) {
// FIXME: compare key of an object and a key found in the
// entry
retval = -EIO;
goto end_unlink;
}
if (!inode->i_nlink) {
reiserfs_warning(inode->i_sb, "reiserfs-7042",
"deleting nonexistent file (%lu), %d",
inode->i_ino, inode->i_nlink);
set_nlink(inode, 1);
}
drop_nlink(inode);
/*
* we schedule before doing the add_save_link call, save the link
* count so we don't race
*/
savelink = inode->i_nlink;
retval =
reiserfs_cut_from_item(&th, &path, &(de.de_entry_key), dir, NULL,
0);
if (retval < 0) {
inc_nlink(inode);
goto end_unlink;
}
inode->i_ctime = CURRENT_TIME_SEC;
reiserfs_update_sd(&th, inode);
dir->i_size -= (de.de_entrylen + DEH_SIZE);
dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC;
reiserfs_update_sd(&th, dir);
if (!savelink)
/* prevent file from getting lost */
add_save_link(&th, inode, 0 /* not truncate */ );
retval = journal_end(&th, dir->i_sb, jbegin_count);
reiserfs_check_path(&path);
reiserfs_write_unlock_once(dir->i_sb, depth);
return retval;
end_unlink:
pathrelse(&path);
err = journal_end(&th, dir->i_sb, jbegin_count);
reiserfs_check_path(&path);
if (err)
retval = err;
out_unlink:
reiserfs_write_unlock_once(dir->i_sb, depth);
return retval;
}
int reiserfs_rmdir (struct inode * dir, struct dentry *dentry)
{
struct inode * inode;
int retval;
struct reiserfs_dir_entry de;
struct path path;
struct super_block *s ;
int windex ;
struct reiserfs_transaction_handle th ;
int jbegin_count = JOURNAL_PER_BALANCE_CNT * 3;
init_path (&path);
retval = -ENOENT;
de.de_gen_number_bit_string = 0;
journal_begin(&th, dir->i_sb, jbegin_count) ;
windex = push_journal_writer("reiesrfs_rmdir") ;
if (reiserfs_find_entry (dir, dentry->d_name.name, dentry->d_name.len, &path, &de) == POSITION_NOT_FOUND)
goto end_rmdir;
inode = dentry->d_inode;
/* we don't need call this so early here, I'm just being cautious */
reiserfs_update_inode_transaction(inode) ;
reiserfs_update_inode_transaction(dir) ;
retval = rmdir_not_allowed (dir, &de, inode);
if (retval)
goto end_rmdir;
/* free preserve list if we should */
/* maybe_free_preserve_list (dir->i_sb);*/
if (!reiserfs_empty_dir (inode))
retval = -ENOTEMPTY;
else {
/* cut entry from dir directory */
if (reiserfs_cut_from_item (&th, dir, dir->i_sb, &path, &(de.de_entry_num), &(de.de_entry_key), 0, NOTHING_SPECIAL) == 0) {
retval = -ENOENT;
}
}
if (retval)
goto end_rmdir;
if (inode->i_nlink != 2)
printk ("reiserfs_rmdir: empty directory has nlink != 2 (%d)\n", inode->i_nlink);
inode->i_nlink = 0;
inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME;
if_in_ram_update_sd (&th, inode);
dir->i_nlink --;
dir->i_size -= (DEH_SIZE + de.de_entrylen);
if_in_ram_update_sd (&th, dir);
s = dir->i_sb ;
pop_journal_writer(windex) ;
journal_end(&th, s, jbegin_count) ;
d_delete(dentry); /* note, we've moved this after the journal end */
return 0;
end_rmdir:
/* we must release path, because we did not call reiserfs_cut_from_item, or reiserfs_cut_from_item
does not release path if operation was not complete */
pathrelse (&path);
pop_journal_writer(windex) ;
journal_end(&th, dir->i_sb, jbegin_count) ;
return retval;
}
