diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/nilfs2/ifile.c')
| -rw-r--r-- | ANDROID_3.4.5/fs/nilfs2/ifile.c | 201 |
1 files changed, 0 insertions, 201 deletions
diff --git a/ANDROID_3.4.5/fs/nilfs2/ifile.c b/ANDROID_3.4.5/fs/nilfs2/ifile.c deleted file mode 100644 index 5a48df79..00000000 --- a/ANDROID_3.4.5/fs/nilfs2/ifile.c +++ /dev/null @@ -1,201 +0,0 @@ -/* - * ifile.c - NILFS inode file - * - * Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - * - * Written by Amagai Yoshiji <amagai@osrg.net>. - * Revised by Ryusuke Konishi <ryusuke@osrg.net>. - * - */ - -#include <linux/types.h> -#include <linux/buffer_head.h> -#include "nilfs.h" -#include "mdt.h" -#include "alloc.h" -#include "ifile.h" - - -struct nilfs_ifile_info { - struct nilfs_mdt_info mi; - struct nilfs_palloc_cache palloc_cache; -}; - -static inline struct nilfs_ifile_info *NILFS_IFILE_I(struct inode *ifile) -{ - return (struct nilfs_ifile_info *)NILFS_MDT(ifile); -} - -/** - * nilfs_ifile_create_inode - create a new disk inode - * @ifile: ifile inode - * @out_ino: pointer to a variable to store inode number - * @out_bh: buffer_head contains newly allocated disk inode - * - * Return Value: On success, 0 is returned and the newly allocated inode - * number is stored in the place pointed by @ino, and buffer_head pointer - * that contains newly allocated disk inode structure is stored in the - * place pointed by @out_bh - * On error, one of the following negative error codes is returned. - * - * %-EIO - I/O error. - * - * %-ENOMEM - Insufficient amount of memory available. - * - * %-ENOSPC - No inode left. - */ -int nilfs_ifile_create_inode(struct inode *ifile, ino_t *out_ino, - struct buffer_head **out_bh) -{ - struct nilfs_palloc_req req; - int ret; - - req.pr_entry_nr = 0; /* 0 says find free inode from beginning of - a group. dull code!! */ - req.pr_entry_bh = NULL; - - ret = nilfs_palloc_prepare_alloc_entry(ifile, &req); - if (!ret) { - ret = nilfs_palloc_get_entry_block(ifile, req.pr_entry_nr, 1, - &req.pr_entry_bh); - if (ret < 0) - nilfs_palloc_abort_alloc_entry(ifile, &req); - } - if (ret < 0) { - brelse(req.pr_entry_bh); - return ret; - } - nilfs_palloc_commit_alloc_entry(ifile, &req); - mark_buffer_dirty(req.pr_entry_bh); - nilfs_mdt_mark_dirty(ifile); - *out_ino = (ino_t)req.pr_entry_nr; - *out_bh = req.pr_entry_bh; - return 0; -} - -/** - * 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_ifile_get_inode_block(struct inode *ifile, ino_t ino, - struct buffer_head **out_bh) -{ - struct super_block *sb = ifile->i_sb; - int err; - - if (unlikely(!NILFS_VALID_INODE(sb, ino))) { - nilfs_error(sb, __func__, "bad inode number: %lu", - (unsigned long) ino); - return -EINVAL; - } - - err = nilfs_palloc_get_entry_block(ifile, ino, 0, out_bh); - if (unlikely(err)) - nilfs_warning(sb, __func__, "unable to read inode: %lu", - (unsigned long) ino); - return err; -} - -/** - * nilfs_ifile_read - read or get ifile inode - * @sb: super block instance - * @root: root object - * @inode_size: size of an inode - * @raw_inode: on-disk ifile inode - * @inodep: buffer to store the inode - */ -int nilfs_ifile_read(struct super_block *sb, struct nilfs_root *root, - size_t inode_size, struct nilfs_inode *raw_inode, - struct inode **inodep) -{ - struct inode *ifile; - int err; - - ifile = nilfs_iget_locked(sb, root, NILFS_IFILE_INO); - if (unlikely(!ifile)) - return -ENOMEM; - if (!(ifile->i_state & I_NEW)) - goto out; - - err = nilfs_mdt_init(ifile, NILFS_MDT_GFP, - sizeof(struct nilfs_ifile_info)); - if (err) - goto failed; - - err = nilfs_palloc_init_blockgroup(ifile, inode_size); - if (err) - goto failed; - - nilfs_palloc_setup_cache(ifile, &NILFS_IFILE_I(ifile)->palloc_cache); - - err = nilfs_read_inode_common(ifile, raw_inode); - if (err) - goto failed; - - unlock_new_inode(ifile); - out: - *inodep = ifile; - return 0; - failed: - iget_failed(ifile); - return err; -} |