/**
* nilfs_ifile_delete_inode - delete a disk inode
* @ifile: ifile inode
* @ino: inode number
*
* Return Value: On success, 0 is returned. On error, one of the following
* negative error codes is returned.
*
* %-EIO - I/O error.
*
* %-ENOMEM - Insufficient amount of memory available.
*
* %-ENOENT - The inode number @ino have not been allocated.
*/
int nilfs_ifile_delete_inode(struct inode *ifile, ino_t ino)
{
struct nilfs_palloc_req req = {
.pr_entry_nr = ino, .pr_entry_bh = NULL
};
struct nilfs_inode *raw_inode;
void *kaddr;
int ret;
ret = nilfs_palloc_prepare_free_entry(ifile, &req);
if (!ret) {
ret = nilfs_palloc_get_entry_block(ifile, req.pr_entry_nr, 0,
&req.pr_entry_bh);
if (ret < 0)
nilfs_palloc_abort_free_entry(ifile, &req);
}
if (ret < 0) {
brelse(req.pr_entry_bh);
return ret;
}
kaddr = kmap_atomic(req.pr_entry_bh->b_page);
raw_inode = nilfs_palloc_block_get_entry(ifile, req.pr_entry_nr,
req.pr_entry_bh, kaddr);
raw_inode->i_flags = 0;
kunmap_atomic(kaddr);
mark_buffer_dirty(req.pr_entry_bh);
brelse(req.pr_entry_bh);
nilfs_palloc_commit_free_entry(ifile, &req);
return 0;
}
int nilfs_dat_prepare_end(struct inode *dat, struct nilfs_palloc_req *req)
{
struct nilfs_dat_entry *entry;
__u64 start;
sector_t blocknr;
void *kaddr;
int ret;
ret = nilfs_dat_prepare_entry(dat, req, 0);
if (ret < 0) {
WARN_ON(ret == -ENOENT);
return ret;
}
kaddr = kmap_atomic(req->pr_entry_bh->b_page, KM_USER0);
entry = nilfs_palloc_block_get_entry(dat, req->pr_entry_nr,
req->pr_entry_bh, kaddr);
start = le64_to_cpu(entry->de_start);
blocknr = le64_to_cpu(entry->de_blocknr);
kunmap_atomic(kaddr, KM_USER0);
if (blocknr == 0) {
ret = nilfs_palloc_prepare_free_entry(dat, req);
if (ret < 0) {
nilfs_dat_abort_entry(dat, req);
return ret;
}
}
return 0;
}
