2008-07-14 10:08:37 -06:00
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/*
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* This file is part of UBIFS.
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*
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* Copyright (C) 2006-2008 Nokia Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 51
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* Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Authors: Artem Bityutskiy (Битюцкий Артём)
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* Adrian Hunter
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*/
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/*
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* This file implements UBIFS initialization and VFS superblock operations. Some
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* initialization stuff which is rather large and complex is placed at
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* corresponding subsystems, but most of it is here.
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*/
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/ctype.h>
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#include <linux/kthread.h>
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#include <linux/parser.h>
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#include <linux/seq_file.h>
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#include <linux/mount.h>
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2008-12-18 05:06:51 -07:00
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#include <linux/math64.h>
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2008-12-27 23:04:17 -07:00
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#include <linux/writeback.h>
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2008-07-14 10:08:37 -06:00
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#include "ubifs.h"
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2008-11-18 09:09:49 -07:00
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/*
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* Maximum amount of memory we may 'kmalloc()' without worrying that we are
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* allocating too much.
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*/
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#define UBIFS_KMALLOC_OK (128*1024)
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2008-07-14 10:08:37 -06:00
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/* Slab cache for UBIFS inodes */
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struct kmem_cache *ubifs_inode_slab;
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/* UBIFS TNC shrinker description */
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static struct shrinker ubifs_shrinker_info = {
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2013-08-27 18:18:09 -06:00
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.scan_objects = ubifs_shrink_scan,
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.count_objects = ubifs_shrink_count,
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2008-07-14 10:08:37 -06:00
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.seeks = DEFAULT_SEEKS,
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};
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/**
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* validate_inode - validate inode.
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* @c: UBIFS file-system description object
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* @inode: the inode to validate
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*
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* This is a helper function for 'ubifs_iget()' which validates various fields
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* of a newly built inode to make sure they contain sane values and prevent
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* possible vulnerabilities. Returns zero if the inode is all right and
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* a non-zero error code if not.
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*/
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static int validate_inode(struct ubifs_info *c, const struct inode *inode)
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{
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int err;
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const struct ubifs_inode *ui = ubifs_inode(inode);
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if (inode->i_size > c->max_inode_sz) {
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ubifs_err("inode is too large (%lld)",
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(long long)inode->i_size);
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return 1;
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}
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2014-06-10 20:42:52 -06:00
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if (ui->compr_type >= UBIFS_COMPR_TYPES_CNT) {
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2008-07-14 10:08:37 -06:00
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ubifs_err("unknown compression type %d", ui->compr_type);
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return 2;
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}
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if (ui->xattr_names + ui->xattr_cnt > XATTR_LIST_MAX)
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return 3;
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if (ui->data_len < 0 || ui->data_len > UBIFS_MAX_INO_DATA)
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return 4;
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2011-05-26 00:43:34 -06:00
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if (ui->xattr && !S_ISREG(inode->i_mode))
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2008-07-14 10:08:37 -06:00
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return 5;
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if (!ubifs_compr_present(ui->compr_type)) {
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2012-08-27 04:34:09 -06:00
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ubifs_warn("inode %lu uses '%s' compression, but it was not compiled in",
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inode->i_ino, ubifs_compr_name(ui->compr_type));
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2008-07-14 10:08:37 -06:00
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}
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2011-05-25 08:38:29 -06:00
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err = dbg_check_dir(c, inode);
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2008-07-14 10:08:37 -06:00
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return err;
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}
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struct inode *ubifs_iget(struct super_block *sb, unsigned long inum)
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{
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int err;
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union ubifs_key key;
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struct ubifs_ino_node *ino;
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struct ubifs_info *c = sb->s_fs_info;
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struct inode *inode;
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struct ubifs_inode *ui;
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dbg_gen("inode %lu", inum);
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inode = iget_locked(sb, inum);
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if (!inode)
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return ERR_PTR(-ENOMEM);
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if (!(inode->i_state & I_NEW))
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return inode;
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ui = ubifs_inode(inode);
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ino = kmalloc(UBIFS_MAX_INO_NODE_SZ, GFP_NOFS);
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if (!ino) {
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err = -ENOMEM;
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goto out;
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}
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ino_key_init(c, &key, inode->i_ino);
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err = ubifs_tnc_lookup(c, &key, ino);
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if (err)
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goto out_ino;
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inode->i_flags |= (S_NOCMTIME | S_NOATIME);
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2011-10-28 06:13:29 -06:00
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set_nlink(inode, le32_to_cpu(ino->nlink));
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2012-02-07 16:50:56 -07:00
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i_uid_write(inode, le32_to_cpu(ino->uid));
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i_gid_write(inode, le32_to_cpu(ino->gid));
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2008-07-14 10:08:37 -06:00
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inode->i_atime.tv_sec = (int64_t)le64_to_cpu(ino->atime_sec);
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inode->i_atime.tv_nsec = le32_to_cpu(ino->atime_nsec);
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inode->i_mtime.tv_sec = (int64_t)le64_to_cpu(ino->mtime_sec);
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inode->i_mtime.tv_nsec = le32_to_cpu(ino->mtime_nsec);
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inode->i_ctime.tv_sec = (int64_t)le64_to_cpu(ino->ctime_sec);
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inode->i_ctime.tv_nsec = le32_to_cpu(ino->ctime_nsec);
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inode->i_mode = le32_to_cpu(ino->mode);
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inode->i_size = le64_to_cpu(ino->size);
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ui->data_len = le32_to_cpu(ino->data_len);
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ui->flags = le32_to_cpu(ino->flags);
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ui->compr_type = le16_to_cpu(ino->compr_type);
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ui->creat_sqnum = le64_to_cpu(ino->creat_sqnum);
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ui->xattr_cnt = le32_to_cpu(ino->xattr_cnt);
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ui->xattr_size = le32_to_cpu(ino->xattr_size);
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ui->xattr_names = le32_to_cpu(ino->xattr_names);
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ui->synced_i_size = ui->ui_size = inode->i_size;
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ui->xattr = (ui->flags & UBIFS_XATTR_FL) ? 1 : 0;
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err = validate_inode(c, inode);
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if (err)
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goto out_invalid;
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2008-08-13 05:13:26 -06:00
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/* Disable read-ahead */
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2008-07-14 10:08:37 -06:00
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inode->i_mapping->backing_dev_info = &c->bdi;
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switch (inode->i_mode & S_IFMT) {
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case S_IFREG:
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inode->i_mapping->a_ops = &ubifs_file_address_operations;
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inode->i_op = &ubifs_file_inode_operations;
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inode->i_fop = &ubifs_file_operations;
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if (ui->xattr) {
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ui->data = kmalloc(ui->data_len + 1, GFP_NOFS);
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if (!ui->data) {
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err = -ENOMEM;
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goto out_ino;
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}
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memcpy(ui->data, ino->data, ui->data_len);
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((char *)ui->data)[ui->data_len] = '\0';
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} else if (ui->data_len != 0) {
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err = 10;
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goto out_invalid;
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}
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break;
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case S_IFDIR:
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inode->i_op = &ubifs_dir_inode_operations;
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inode->i_fop = &ubifs_dir_operations;
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if (ui->data_len != 0) {
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err = 11;
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goto out_invalid;
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}
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break;
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case S_IFLNK:
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inode->i_op = &ubifs_symlink_inode_operations;
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if (ui->data_len <= 0 || ui->data_len > UBIFS_MAX_INO_DATA) {
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err = 12;
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goto out_invalid;
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}
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ui->data = kmalloc(ui->data_len + 1, GFP_NOFS);
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if (!ui->data) {
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err = -ENOMEM;
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goto out_ino;
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}
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memcpy(ui->data, ino->data, ui->data_len);
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((char *)ui->data)[ui->data_len] = '\0';
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break;
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case S_IFBLK:
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case S_IFCHR:
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{
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dev_t rdev;
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union ubifs_dev_desc *dev;
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ui->data = kmalloc(sizeof(union ubifs_dev_desc), GFP_NOFS);
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if (!ui->data) {
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err = -ENOMEM;
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goto out_ino;
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}
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dev = (union ubifs_dev_desc *)ino->data;
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if (ui->data_len == sizeof(dev->new))
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rdev = new_decode_dev(le32_to_cpu(dev->new));
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else if (ui->data_len == sizeof(dev->huge))
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rdev = huge_decode_dev(le64_to_cpu(dev->huge));
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else {
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err = 13;
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goto out_invalid;
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}
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memcpy(ui->data, ino->data, ui->data_len);
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inode->i_op = &ubifs_file_inode_operations;
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init_special_inode(inode, inode->i_mode, rdev);
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break;
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}
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case S_IFSOCK:
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case S_IFIFO:
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inode->i_op = &ubifs_file_inode_operations;
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init_special_inode(inode, inode->i_mode, 0);
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if (ui->data_len != 0) {
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err = 14;
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goto out_invalid;
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}
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break;
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default:
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err = 15;
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goto out_invalid;
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}
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kfree(ino);
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ubifs_set_inode_flags(inode);
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unlock_new_inode(inode);
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return inode;
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out_invalid:
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ubifs_err("inode %lu validation failed, error %d", inode->i_ino, err);
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2012-05-16 10:15:56 -06:00
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ubifs_dump_node(c, ino);
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ubifs_dump_inode(c, inode);
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2008-07-14 10:08:37 -06:00
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err = -EINVAL;
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out_ino:
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kfree(ino);
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out:
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ubifs_err("failed to read inode %lu, error %d", inode->i_ino, err);
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iget_failed(inode);
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return ERR_PTR(err);
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}
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static struct inode *ubifs_alloc_inode(struct super_block *sb)
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{
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struct ubifs_inode *ui;
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ui = kmem_cache_alloc(ubifs_inode_slab, GFP_NOFS);
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if (!ui)
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return NULL;
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memset((void *)ui + sizeof(struct inode), 0,
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sizeof(struct ubifs_inode) - sizeof(struct inode));
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mutex_init(&ui->ui_mutex);
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spin_lock_init(&ui->ui_lock);
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return &ui->vfs_inode;
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};
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|
2011-01-06 23:49:49 -07:00
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static void ubifs_i_callback(struct rcu_head *head)
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{
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struct inode *inode = container_of(head, struct inode, i_rcu);
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struct ubifs_inode *ui = ubifs_inode(inode);
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kmem_cache_free(ubifs_inode_slab, ui);
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}
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|
2008-07-14 10:08:37 -06:00
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static void ubifs_destroy_inode(struct inode *inode)
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{
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struct ubifs_inode *ui = ubifs_inode(inode);
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kfree(ui->data);
|
2011-01-06 23:49:49 -07:00
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call_rcu(&inode->i_rcu, ubifs_i_callback);
|
2008-07-14 10:08:37 -06:00
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}
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/*
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* Note, Linux write-back code calls this without 'i_mutex'.
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*/
|
2010-03-05 01:21:37 -07:00
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|
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static int ubifs_write_inode(struct inode *inode, struct writeback_control *wbc)
|
2008-07-14 10:08:37 -06:00
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|
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{
|
2008-07-22 02:52:52 -06:00
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|
|
int err = 0;
|
2008-07-14 10:08:37 -06:00
|
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struct ubifs_info *c = inode->i_sb->s_fs_info;
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struct ubifs_inode *ui = ubifs_inode(inode);
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|
|
|
|
ubifs_assert(!ui->xattr);
|
|
|
|
|
if (is_bad_inode(inode))
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
mutex_lock(&ui->ui_mutex);
|
|
|
|
|
/*
|
|
|
|
|
* Due to races between write-back forced by budgeting
|
2012-07-25 09:12:14 -06:00
|
|
|
|
* (see 'sync_some_inodes()') and background write-back, the inode may
|
2008-07-14 10:08:37 -06:00
|
|
|
|
* have already been synchronized, do not do this again. This might
|
|
|
|
|
* also happen if it was synchronized in an VFS operation, e.g.
|
|
|
|
|
* 'ubifs_link()'.
|
|
|
|
|
*/
|
|
|
|
|
if (!ui->dirty) {
|
|
|
|
|
mutex_unlock(&ui->ui_mutex);
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
2008-07-22 02:52:52 -06:00
|
|
|
|
/*
|
|
|
|
|
* As an optimization, do not write orphan inodes to the media just
|
|
|
|
|
* because this is not needed.
|
|
|
|
|
*/
|
|
|
|
|
dbg_gen("inode %lu, mode %#x, nlink %u",
|
|
|
|
|
inode->i_ino, (int)inode->i_mode, inode->i_nlink);
|
|
|
|
|
if (inode->i_nlink) {
|
2008-07-22 03:06:13 -06:00
|
|
|
|
err = ubifs_jnl_write_inode(c, inode);
|
2008-07-22 02:52:52 -06:00
|
|
|
|
if (err)
|
|
|
|
|
ubifs_err("can't write inode %lu, error %d",
|
|
|
|
|
inode->i_ino, err);
|
2009-08-27 07:34:19 -06:00
|
|
|
|
else
|
|
|
|
|
err = dbg_check_inode_size(c, inode, ui->ui_size);
|
2008-07-22 02:52:52 -06:00
|
|
|
|
}
|
2008-07-14 10:08:37 -06:00
|
|
|
|
|
|
|
|
|
ui->dirty = 0;
|
|
|
|
|
mutex_unlock(&ui->ui_mutex);
|
|
|
|
|
ubifs_release_dirty_inode_budget(c, ui);
|
|
|
|
|
return err;
|
|
|
|
|
}
|
|
|
|
|
|
2010-06-06 22:34:05 -06:00
|
|
|
|
static void ubifs_evict_inode(struct inode *inode)
|
2008-07-14 10:08:37 -06:00
|
|
|
|
{
|
|
|
|
|
int err;
|
|
|
|
|
struct ubifs_info *c = inode->i_sb->s_fs_info;
|
2008-07-21 01:59:53 -06:00
|
|
|
|
struct ubifs_inode *ui = ubifs_inode(inode);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
|
2008-07-21 01:59:53 -06:00
|
|
|
|
if (ui->xattr)
|
2008-07-14 10:08:37 -06:00
|
|
|
|
/*
|
|
|
|
|
* Extended attribute inode deletions are fully handled in
|
|
|
|
|
* 'ubifs_removexattr()'. These inodes are special and have
|
|
|
|
|
* limited usage, so there is nothing to do here.
|
|
|
|
|
*/
|
|
|
|
|
goto out;
|
|
|
|
|
|
2008-07-18 09:54:29 -06:00
|
|
|
|
dbg_gen("inode %lu, mode %#x", inode->i_ino, (int)inode->i_mode);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
ubifs_assert(!atomic_read(&inode->i_count));
|
|
|
|
|
|
2014-04-03 15:47:49 -06:00
|
|
|
|
truncate_inode_pages_final(&inode->i_data);
|
2010-06-06 22:34:05 -06:00
|
|
|
|
|
|
|
|
|
if (inode->i_nlink)
|
|
|
|
|
goto done;
|
|
|
|
|
|
2008-07-14 10:08:37 -06:00
|
|
|
|
if (is_bad_inode(inode))
|
|
|
|
|
goto out;
|
|
|
|
|
|
2008-07-21 01:59:53 -06:00
|
|
|
|
ui->ui_size = inode->i_size = 0;
|
2008-07-22 04:06:20 -06:00
|
|
|
|
err = ubifs_jnl_delete_inode(c, inode);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
if (err)
|
|
|
|
|
/*
|
|
|
|
|
* Worst case we have a lost orphan inode wasting space, so a
|
2008-08-13 05:13:26 -06:00
|
|
|
|
* simple error message is OK here.
|
2008-07-14 10:08:37 -06:00
|
|
|
|
*/
|
2008-07-22 04:06:20 -06:00
|
|
|
|
ubifs_err("can't delete inode %lu, error %d",
|
|
|
|
|
inode->i_ino, err);
|
|
|
|
|
|
2008-07-14 10:08:37 -06:00
|
|
|
|
out:
|
2008-07-21 01:59:53 -06:00
|
|
|
|
if (ui->dirty)
|
|
|
|
|
ubifs_release_dirty_inode_budget(c, ui);
|
2009-04-08 06:07:57 -06:00
|
|
|
|
else {
|
|
|
|
|
/* We've deleted something - clean the "no space" flags */
|
2011-03-29 09:04:05 -06:00
|
|
|
|
c->bi.nospace = c->bi.nospace_rp = 0;
|
2009-04-08 06:07:57 -06:00
|
|
|
|
smp_wmb();
|
|
|
|
|
}
|
2010-06-06 22:34:05 -06:00
|
|
|
|
done:
|
2012-05-03 06:48:02 -06:00
|
|
|
|
clear_inode(inode);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
}
|
|
|
|
|
|
2011-05-27 04:53:02 -06:00
|
|
|
|
static void ubifs_dirty_inode(struct inode *inode, int flags)
|
2008-07-14 10:08:37 -06:00
|
|
|
|
{
|
|
|
|
|
struct ubifs_inode *ui = ubifs_inode(inode);
|
|
|
|
|
|
|
|
|
|
ubifs_assert(mutex_is_locked(&ui->ui_mutex));
|
|
|
|
|
if (!ui->dirty) {
|
|
|
|
|
ui->dirty = 1;
|
|
|
|
|
dbg_gen("inode %lu", inode->i_ino);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int ubifs_statfs(struct dentry *dentry, struct kstatfs *buf)
|
|
|
|
|
{
|
|
|
|
|
struct ubifs_info *c = dentry->d_sb->s_fs_info;
|
|
|
|
|
unsigned long long free;
|
2008-09-03 05:16:42 -06:00
|
|
|
|
__le32 *uuid = (__le32 *)c->uuid;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
|
UBIFS: improve statfs reporting even more
Since free space we report in statfs is file size which should
fit to the FS - change the way we calculate free space and use
leb_overhead instead of dark_wm in calculations.
Results of "freespace" test (120MiB volume, 16KiB LEB size,
512 bytes page size). Before the change:
freespace: Test 1: fill the space we have 3 times
freespace: was free: 85204992 bytes 81.3 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 11284480 bytes 10.8 MiB, wrote 13.2% more than predicted
freespace: was free: 83554304 bytes 79.7 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 12935168 bytes 12.3 MiB, wrote 15.5% more than predicted
freespace: was free: 83554304 bytes 79.7 MiB, wrote: 96493568 bytes 92.0 MiB, delta: 12939264 bytes 12.3 MiB, wrote 15.5% more than predicted
freespace: Test 1 finished
freespace: Test 2: gradually lessen amount of free space and fill the FS
freespace: do 10 steps, lessen free space by 7596218 bytes 7.2 MiB each time
freespace: was free: 78675968 bytes 75.0 MiB, wrote: 88903680 bytes 84.8 MiB, delta: 10227712 bytes 9.8 MiB, wrote 13.0% more than predicted
freespace: was free: 72015872 bytes 68.7 MiB, wrote: 81514496 bytes 77.7 MiB, delta: 9498624 bytes 9.1 MiB, wrote 13.2% more than predicted
freespace: was free: 63938560 bytes 61.0 MiB, wrote: 72589312 bytes 69.2 MiB, delta: 8650752 bytes 8.2 MiB, wrote 13.5% more than predicted
freespace: was free: 56127488 bytes 53.5 MiB, wrote: 63762432 bytes 60.8 MiB, delta: 7634944 bytes 7.3 MiB, wrote 13.6% more than predicted
freespace: was free: 48336896 bytes 46.1 MiB, wrote: 54935552 bytes 52.4 MiB, delta: 6598656 bytes 6.3 MiB, wrote 13.7% more than predicted
freespace: was free: 40587264 bytes 38.7 MiB, wrote: 46157824 bytes 44.0 MiB, delta: 5570560 bytes 5.3 MiB, wrote 13.7% more than predicted
freespace: was free: 32841728 bytes 31.3 MiB, wrote: 37384192 bytes 35.7 MiB, delta: 4542464 bytes 4.3 MiB, wrote 13.8% more than predicted
freespace: was free: 25100288 bytes 23.9 MiB, wrote: 28618752 bytes 27.3 MiB, delta: 3518464 bytes 3.4 MiB, wrote 14.0% more than predicted
freespace: was free: 17342464 bytes 16.5 MiB, wrote: 19841024 bytes 18.9 MiB, delta: 2498560 bytes 2.4 MiB, wrote 14.4% more than predicted
freespace: was free: 9605120 bytes 9.2 MiB, wrote: 11063296 bytes 10.6 MiB, delta: 1458176 bytes 1.4 MiB, wrote 15.2% more than predicted
freespace: Test 2 finished
freespace: Test 3: gradually lessen amount of free space by trashing and fill the FS
freespace: do 10 steps, lessen free space by 7606272 bytes 7.3 MiB each time
freespace: trashing: was free: 83668992 bytes 79.8 MiB, need free: 7606272 bytes 7.3 MiB, files created: 248297, delete 225724 (90.9% of them)
freespace: was free: 70803456 bytes 67.5 MiB, wrote: 82485248 bytes 78.7 MiB, delta: 11681792 bytes 11.1 MiB, wrote 16.5% more than predicted
freespace: trashing: was free: 81080320 bytes 77.3 MiB, need free: 15212544 bytes 14.5 MiB, files created: 248711, delete 202047 (81.2% of them)
freespace: was free: 59867136 bytes 57.1 MiB, wrote: 71897088 bytes 68.6 MiB, delta: 12029952 bytes 11.5 MiB, wrote 20.1% more than predicted
freespace: trashing: was free: 82243584 bytes 78.4 MiB, need free: 22818816 bytes 21.8 MiB, files created: 248866, delete 179817 (72.3% of them)
freespace: was free: 50905088 bytes 48.5 MiB, wrote: 63168512 bytes 60.2 MiB, delta: 12263424 bytes 11.7 MiB, wrote 24.1% more than predicted
freespace: trashing: was free: 83402752 bytes 79.5 MiB, need free: 30425088 bytes 29.0 MiB, files created: 248920, delete 158114 (63.5% of them)
freespace: was free: 42651648 bytes 40.7 MiB, wrote: 55406592 bytes 52.8 MiB, delta: 12754944 bytes 12.2 MiB, wrote 29.9% more than predicted
freespace: trashing: was free: 84402176 bytes 80.5 MiB, need free: 38031360 bytes 36.3 MiB, files created: 248709, delete 136641 (54.9% of them)
freespace: was free: 35233792 bytes 33.6 MiB, wrote: 48250880 bytes 46.0 MiB, delta: 13017088 bytes 12.4 MiB, wrote 36.9% more than predicted
freespace: trashing: was free: 82530304 bytes 78.7 MiB, need free: 45637632 bytes 43.5 MiB, files created: 248778, delete 111208 (44.7% of them)
freespace: was free: 27287552 bytes 26.0 MiB, wrote: 40267776 bytes 38.4 MiB, delta: 12980224 bytes 12.4 MiB, wrote 47.6% more than predicted
freespace: trashing: was free: 85114880 bytes 81.2 MiB, need free: 53243904 bytes 50.8 MiB, files created: 248508, delete 93052 (37.4% of them)
freespace: was free: 22437888 bytes 21.4 MiB, wrote: 35328000 bytes 33.7 MiB, delta: 12890112 bytes 12.3 MiB, wrote 57.4% more than predicted
freespace: trashing: was free: 84103168 bytes 80.2 MiB, need free: 60850176 bytes 58.0 MiB, files created: 248637, delete 68743 (27.6% of them)
freespace: was free: 15536128 bytes 14.8 MiB, wrote: 28319744 bytes 27.0 MiB, delta: 12783616 bytes 12.2 MiB, wrote 82.3% more than predicted
freespace: trashing: was free: 84357120 bytes 80.4 MiB, need free: 68456448 bytes 65.3 MiB, files created: 248567, delete 46852 (18.8% of them)
freespace: was free: 9015296 bytes 8.6 MiB, wrote: 22044672 bytes 21.0 MiB, delta: 13029376 bytes 12.4 MiB, wrote 144.5% more than predicted
freespace: trashing: was free: 84942848 bytes 81.0 MiB, need free: 76062720 bytes 72.5 MiB, files created: 248636, delete 25993 (10.5% of them)
freespace: was free: 6086656 bytes 5.8 MiB, wrote: 8331264 bytes 7.9 MiB, delta: 2244608 bytes 2.1 MiB, wrote 36.9% more than predicted
freespace: Test 3 finished
freespace: finished successfully
After the change:
freespace: Test 1: fill the space we have 3 times
freespace: was free: 94048256 bytes 89.7 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 2441216 bytes 2.3 MiB, wrote 2.6% more than predicted
freespace: was free: 92246016 bytes 88.0 MiB, wrote: 96493568 bytes 92.0 MiB, delta: 4247552 bytes 4.1 MiB, wrote 4.6% more than predicted
freespace: was free: 92254208 bytes 88.0 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 4235264 bytes 4.0 MiB, wrote 4.6% more than predicted
freespace: Test 1 finished
freespace: Test 2: gradually lessen amount of free space and fill the FS
freespace: do 10 steps, lessen free space by 8386001 bytes 8.0 MiB each time
freespace: was free: 86605824 bytes 82.6 MiB, wrote: 88252416 bytes 84.2 MiB, delta: 1646592 bytes 1.6 MiB, wrote 1.9% more than predicted
freespace: was free: 78667776 bytes 75.0 MiB, wrote: 80715776 bytes 77.0 MiB, delta: 2048000 bytes 2.0 MiB, wrote 2.6% more than predicted
freespace: was free: 69615616 bytes 66.4 MiB, wrote: 71630848 bytes 68.3 MiB, delta: 2015232 bytes 1.9 MiB, wrote 2.9% more than predicted
freespace: was free: 61018112 bytes 58.2 MiB, wrote: 62783488 bytes 59.9 MiB, delta: 1765376 bytes 1.7 MiB, wrote 2.9% more than predicted
freespace: was free: 52424704 bytes 50.0 MiB, wrote: 53968896 bytes 51.5 MiB, delta: 1544192 bytes 1.5 MiB, wrote 2.9% more than predicted
freespace: was free: 43880448 bytes 41.8 MiB, wrote: 45199360 bytes 43.1 MiB, delta: 1318912 bytes 1.3 MiB, wrote 3.0% more than predicted
freespace: was free: 35332096 bytes 33.7 MiB, wrote: 36425728 bytes 34.7 MiB, delta: 1093632 bytes 1.0 MiB, wrote 3.1% more than predicted
freespace: was free: 26771456 bytes 25.5 MiB, wrote: 27643904 bytes 26.4 MiB, delta: 872448 bytes 852.0 KiB, wrote 3.3% more than predicted
freespace: was free: 18231296 bytes 17.4 MiB, wrote: 18878464 bytes 18.0 MiB, delta: 647168 bytes 632.0 KiB, wrote 3.5% more than predicted
freespace: was free: 9674752 bytes 9.2 MiB, wrote: 10088448 bytes 9.6 MiB, delta: 413696 bytes 404.0 KiB, wrote 4.3% more than predicted
freespace: Test 2 finished
freespace: Test 3: gradually lessen amount of free space by trashing and fill the FS
freespace: do 10 steps, lessen free space by 8397544 bytes 8.0 MiB each time
freespace: trashing: was free: 92372992 bytes 88.1 MiB, need free: 8397552 bytes 8.0 MiB, files created: 248296, delete 225723 (90.9% of them)
freespace: was free: 71909376 bytes 68.6 MiB, wrote: 82472960 bytes 78.7 MiB, delta: 10563584 bytes 10.1 MiB, wrote 14.7% more than predicted
freespace: trashing: was free: 88989696 bytes 84.9 MiB, need free: 16795096 bytes 16.0 MiB, files created: 248794, delete 201838 (81.1% of them)
freespace: was free: 60354560 bytes 57.6 MiB, wrote: 71782400 bytes 68.5 MiB, delta: 11427840 bytes 10.9 MiB, wrote 18.9% more than predicted
freespace: trashing: was free: 90304512 bytes 86.1 MiB, need free: 25192640 bytes 24.0 MiB, files created: 248733, delete 179342 (72.1% of them)
freespace: was free: 51187712 bytes 48.8 MiB, wrote: 62943232 bytes 60.0 MiB, delta: 11755520 bytes 11.2 MiB, wrote 23.0% more than predicted
freespace: trashing: was free: 91209728 bytes 87.0 MiB, need free: 33590184 bytes 32.0 MiB, files created: 248779, delete 157160 (63.2% of them)
freespace: was free: 42704896 bytes 40.7 MiB, wrote: 55050240 bytes 52.5 MiB, delta: 12345344 bytes 11.8 MiB, wrote 28.9% more than predicted
freespace: trashing: was free: 92700672 bytes 88.4 MiB, need free: 41987728 bytes 40.0 MiB, files created: 248848, delete 136135 (54.7% of them)
freespace: was free: 35250176 bytes 33.6 MiB, wrote: 48115712 bytes 45.9 MiB, delta: 12865536 bytes 12.3 MiB, wrote 36.5% more than predicted
freespace: trashing: was free: 93986816 bytes 89.6 MiB, need free: 50385272 bytes 48.1 MiB, files created: 248723, delete 115385 (46.4% of them)
freespace: was free: 29995008 bytes 28.6 MiB, wrote: 41582592 bytes 39.7 MiB, delta: 11587584 bytes 11.1 MiB, wrote 38.6% more than predicted
freespace: trashing: was free: 91881472 bytes 87.6 MiB, need free: 58782816 bytes 56.1 MiB, files created: 248645, delete 89569 (36.0% of them)
freespace: was free: 22511616 bytes 21.5 MiB, wrote: 34705408 bytes 33.1 MiB, delta: 12193792 bytes 11.6 MiB, wrote 54.2% more than predicted
freespace: trashing: was free: 91774976 bytes 87.5 MiB, need free: 67180360 bytes 64.1 MiB, files created: 248580, delete 66616 (26.8% of them)
freespace: was free: 16908288 bytes 16.1 MiB, wrote: 26898432 bytes 25.7 MiB, delta: 9990144 bytes 9.5 MiB, wrote 59.1% more than predicted
freespace: trashing: was free: 92450816 bytes 88.2 MiB, need free: 75577904 bytes 72.1 MiB, files created: 248654, delete 45381 (18.3% of them)
freespace: was free: 10170368 bytes 9.7 MiB, wrote: 19111936 bytes 18.2 MiB, delta: 8941568 bytes 8.5 MiB, wrote 87.9% more than predicted
freespace: trashing: was free: 93282304 bytes 89.0 MiB, need free: 83975448 bytes 80.1 MiB, files created: 248513, delete 24794 (10.0% of them)
freespace: was free: 3911680 bytes 3.7 MiB, wrote: 7872512 bytes 7.5 MiB, delta: 3960832 bytes 3.8 MiB, wrote 101.3% more than predicted
freespace: Test 3 finished
freespace: finished successfully
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2008-08-25 09:58:19 -06:00
|
|
|
|
free = ubifs_get_free_space(c);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
dbg_gen("free space %lld bytes (%lld blocks)",
|
|
|
|
|
free, free >> UBIFS_BLOCK_SHIFT);
|
|
|
|
|
|
|
|
|
|
buf->f_type = UBIFS_SUPER_MAGIC;
|
|
|
|
|
buf->f_bsize = UBIFS_BLOCK_SIZE;
|
|
|
|
|
buf->f_blocks = c->block_cnt;
|
|
|
|
|
buf->f_bfree = free >> UBIFS_BLOCK_SHIFT;
|
|
|
|
|
if (free > c->report_rp_size)
|
|
|
|
|
buf->f_bavail = (free - c->report_rp_size) >> UBIFS_BLOCK_SHIFT;
|
|
|
|
|
else
|
|
|
|
|
buf->f_bavail = 0;
|
|
|
|
|
buf->f_files = 0;
|
|
|
|
|
buf->f_ffree = 0;
|
|
|
|
|
buf->f_namelen = UBIFS_MAX_NLEN;
|
2008-09-03 05:16:42 -06:00
|
|
|
|
buf->f_fsid.val[0] = le32_to_cpu(uuid[0]) ^ le32_to_cpu(uuid[2]);
|
|
|
|
|
buf->f_fsid.val[1] = le32_to_cpu(uuid[1]) ^ le32_to_cpu(uuid[3]);
|
2009-01-23 09:23:03 -07:00
|
|
|
|
ubifs_assert(buf->f_bfree <= c->block_cnt);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
2011-12-08 19:32:45 -07:00
|
|
|
|
static int ubifs_show_options(struct seq_file *s, struct dentry *root)
|
2008-07-14 10:08:37 -06:00
|
|
|
|
{
|
2011-12-08 19:32:45 -07:00
|
|
|
|
struct ubifs_info *c = root->d_sb->s_fs_info;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
|
|
|
|
|
if (c->mount_opts.unmount_mode == 2)
|
2014-07-15 13:26:35 -06:00
|
|
|
|
seq_puts(s, ",fast_unmount");
|
2008-07-14 10:08:37 -06:00
|
|
|
|
else if (c->mount_opts.unmount_mode == 1)
|
2014-07-15 13:26:35 -06:00
|
|
|
|
seq_puts(s, ",norm_unmount");
|
2008-07-14 10:08:37 -06:00
|
|
|
|
|
2008-09-02 07:29:46 -06:00
|
|
|
|
if (c->mount_opts.bulk_read == 2)
|
2014-07-15 13:26:35 -06:00
|
|
|
|
seq_puts(s, ",bulk_read");
|
2008-09-02 07:29:46 -06:00
|
|
|
|
else if (c->mount_opts.bulk_read == 1)
|
2014-07-15 13:26:35 -06:00
|
|
|
|
seq_puts(s, ",no_bulk_read");
|
2008-09-02 07:29:46 -06:00
|
|
|
|
|
2008-09-04 07:26:00 -06:00
|
|
|
|
if (c->mount_opts.chk_data_crc == 2)
|
2014-07-15 13:26:35 -06:00
|
|
|
|
seq_puts(s, ",chk_data_crc");
|
2008-09-04 07:26:00 -06:00
|
|
|
|
else if (c->mount_opts.chk_data_crc == 1)
|
2014-07-15 13:26:35 -06:00
|
|
|
|
seq_puts(s, ",no_chk_data_crc");
|
2008-09-04 07:26:00 -06:00
|
|
|
|
|
2008-11-01 06:57:49 -06:00
|
|
|
|
if (c->mount_opts.override_compr) {
|
2009-03-18 05:29:39 -06:00
|
|
|
|
seq_printf(s, ",compr=%s",
|
|
|
|
|
ubifs_compr_name(c->mount_opts.compr_type));
|
2008-11-01 06:57:49 -06:00
|
|
|
|
}
|
|
|
|
|
|
2008-07-14 10:08:37 -06:00
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int ubifs_sync_fs(struct super_block *sb, int wait)
|
|
|
|
|
{
|
2008-12-27 23:16:32 -07:00
|
|
|
|
int i, err;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
struct ubifs_info *c = sb->s_fs_info;
|
2008-12-27 23:04:17 -07:00
|
|
|
|
|
2009-01-06 15:40:23 -07:00
|
|
|
|
/*
|
2009-01-09 12:02:37 -07:00
|
|
|
|
* Zero @wait is just an advisory thing to help the file system shove
|
|
|
|
|
* lots of data into the queues, and there will be the second
|
2009-01-06 15:40:23 -07:00
|
|
|
|
* '->sync_fs()' call, with non-zero @wait.
|
|
|
|
|
*/
|
2009-01-09 12:02:37 -07:00
|
|
|
|
if (!wait)
|
|
|
|
|
return 0;
|
2009-01-06 15:40:23 -07:00
|
|
|
|
|
2009-01-29 02:17:24 -07:00
|
|
|
|
/*
|
|
|
|
|
* Synchronize write buffers, because 'ubifs_run_commit()' does not
|
|
|
|
|
* do this if it waits for an already running commit.
|
|
|
|
|
*/
|
|
|
|
|
for (i = 0; i < c->jhead_cnt; i++) {
|
|
|
|
|
err = ubifs_wbuf_sync(&c->jheads[i].wbuf);
|
|
|
|
|
if (err)
|
|
|
|
|
return err;
|
|
|
|
|
}
|
|
|
|
|
|
2009-07-20 08:56:19 -06:00
|
|
|
|
/*
|
|
|
|
|
* Strictly speaking, it is not necessary to commit the journal here,
|
|
|
|
|
* synchronizing write-buffers would be enough. But committing makes
|
|
|
|
|
* UBIFS free space predictions much more accurate, so we want to let
|
|
|
|
|
* the user be able to get more accurate results of 'statfs()' after
|
|
|
|
|
* they synchronize the file system.
|
|
|
|
|
*/
|
2008-12-27 23:16:32 -07:00
|
|
|
|
err = ubifs_run_commit(c);
|
|
|
|
|
if (err)
|
|
|
|
|
return err;
|
2008-09-09 03:31:37 -06:00
|
|
|
|
|
2008-12-27 23:18:43 -07:00
|
|
|
|
return ubi_sync(c->vi.ubi_num);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* init_constants_early - initialize UBIFS constants.
|
|
|
|
|
* @c: UBIFS file-system description object
|
|
|
|
|
*
|
|
|
|
|
* This function initialize UBIFS constants which do not need the superblock to
|
|
|
|
|
* be read. It also checks that the UBI volume satisfies basic UBIFS
|
|
|
|
|
* requirements. Returns zero in case of success and a negative error code in
|
|
|
|
|
* case of failure.
|
|
|
|
|
*/
|
|
|
|
|
static int init_constants_early(struct ubifs_info *c)
|
|
|
|
|
{
|
|
|
|
|
if (c->vi.corrupted) {
|
|
|
|
|
ubifs_warn("UBI volume is corrupted - read-only mode");
|
|
|
|
|
c->ro_media = 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (c->di.ro_mode) {
|
|
|
|
|
ubifs_msg("read-only UBI device");
|
|
|
|
|
c->ro_media = 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (c->vi.vol_type == UBI_STATIC_VOLUME) {
|
|
|
|
|
ubifs_msg("static UBI volume - read-only mode");
|
|
|
|
|
c->ro_media = 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
c->leb_cnt = c->vi.size;
|
|
|
|
|
c->leb_size = c->vi.usable_leb_size;
|
2011-02-14 06:17:55 -07:00
|
|
|
|
c->leb_start = c->di.leb_start;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
c->half_leb_size = c->leb_size / 2;
|
|
|
|
|
c->min_io_size = c->di.min_io_size;
|
|
|
|
|
c->min_io_shift = fls(c->min_io_size) - 1;
|
2011-01-30 09:58:32 -07:00
|
|
|
|
c->max_write_size = c->di.max_write_size;
|
|
|
|
|
c->max_write_shift = fls(c->max_write_size) - 1;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
|
|
|
|
|
if (c->leb_size < UBIFS_MIN_LEB_SZ) {
|
|
|
|
|
ubifs_err("too small LEBs (%d bytes), min. is %d bytes",
|
|
|
|
|
c->leb_size, UBIFS_MIN_LEB_SZ);
|
|
|
|
|
return -EINVAL;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (c->leb_cnt < UBIFS_MIN_LEB_CNT) {
|
|
|
|
|
ubifs_err("too few LEBs (%d), min. is %d",
|
|
|
|
|
c->leb_cnt, UBIFS_MIN_LEB_CNT);
|
|
|
|
|
return -EINVAL;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (!is_power_of_2(c->min_io_size)) {
|
|
|
|
|
ubifs_err("bad min. I/O size %d", c->min_io_size);
|
|
|
|
|
return -EINVAL;
|
|
|
|
|
}
|
|
|
|
|
|
2011-01-30 09:58:32 -07:00
|
|
|
|
/*
|
|
|
|
|
* Maximum write size has to be greater or equivalent to min. I/O
|
|
|
|
|
* size, and be multiple of min. I/O size.
|
|
|
|
|
*/
|
|
|
|
|
if (c->max_write_size < c->min_io_size ||
|
|
|
|
|
c->max_write_size % c->min_io_size ||
|
|
|
|
|
!is_power_of_2(c->max_write_size)) {
|
|
|
|
|
ubifs_err("bad write buffer size %d for %d min. I/O unit",
|
|
|
|
|
c->max_write_size, c->min_io_size);
|
|
|
|
|
return -EINVAL;
|
|
|
|
|
}
|
|
|
|
|
|
2008-07-14 10:08:37 -06:00
|
|
|
|
/*
|
|
|
|
|
* UBIFS aligns all node to 8-byte boundary, so to make function in
|
|
|
|
|
* io.c simpler, assume minimum I/O unit size to be 8 bytes if it is
|
|
|
|
|
* less than 8.
|
|
|
|
|
*/
|
|
|
|
|
if (c->min_io_size < 8) {
|
|
|
|
|
c->min_io_size = 8;
|
|
|
|
|
c->min_io_shift = 3;
|
2011-01-30 09:58:32 -07:00
|
|
|
|
if (c->max_write_size < c->min_io_size) {
|
|
|
|
|
c->max_write_size = c->min_io_size;
|
|
|
|
|
c->max_write_shift = c->min_io_shift;
|
|
|
|
|
}
|
2008-07-14 10:08:37 -06:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
c->ref_node_alsz = ALIGN(UBIFS_REF_NODE_SZ, c->min_io_size);
|
|
|
|
|
c->mst_node_alsz = ALIGN(UBIFS_MST_NODE_SZ, c->min_io_size);
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Initialize node length ranges which are mostly needed for node
|
|
|
|
|
* length validation.
|
|
|
|
|
*/
|
|
|
|
|
c->ranges[UBIFS_PAD_NODE].len = UBIFS_PAD_NODE_SZ;
|
|
|
|
|
c->ranges[UBIFS_SB_NODE].len = UBIFS_SB_NODE_SZ;
|
|
|
|
|
c->ranges[UBIFS_MST_NODE].len = UBIFS_MST_NODE_SZ;
|
|
|
|
|
c->ranges[UBIFS_REF_NODE].len = UBIFS_REF_NODE_SZ;
|
|
|
|
|
c->ranges[UBIFS_TRUN_NODE].len = UBIFS_TRUN_NODE_SZ;
|
|
|
|
|
c->ranges[UBIFS_CS_NODE].len = UBIFS_CS_NODE_SZ;
|
|
|
|
|
|
|
|
|
|
c->ranges[UBIFS_INO_NODE].min_len = UBIFS_INO_NODE_SZ;
|
|
|
|
|
c->ranges[UBIFS_INO_NODE].max_len = UBIFS_MAX_INO_NODE_SZ;
|
|
|
|
|
c->ranges[UBIFS_ORPH_NODE].min_len =
|
|
|
|
|
UBIFS_ORPH_NODE_SZ + sizeof(__le64);
|
|
|
|
|
c->ranges[UBIFS_ORPH_NODE].max_len = c->leb_size;
|
|
|
|
|
c->ranges[UBIFS_DENT_NODE].min_len = UBIFS_DENT_NODE_SZ;
|
|
|
|
|
c->ranges[UBIFS_DENT_NODE].max_len = UBIFS_MAX_DENT_NODE_SZ;
|
|
|
|
|
c->ranges[UBIFS_XENT_NODE].min_len = UBIFS_XENT_NODE_SZ;
|
|
|
|
|
c->ranges[UBIFS_XENT_NODE].max_len = UBIFS_MAX_XENT_NODE_SZ;
|
|
|
|
|
c->ranges[UBIFS_DATA_NODE].min_len = UBIFS_DATA_NODE_SZ;
|
|
|
|
|
c->ranges[UBIFS_DATA_NODE].max_len = UBIFS_MAX_DATA_NODE_SZ;
|
|
|
|
|
/*
|
|
|
|
|
* Minimum indexing node size is amended later when superblock is
|
|
|
|
|
* read and the key length is known.
|
|
|
|
|
*/
|
|
|
|
|
c->ranges[UBIFS_IDX_NODE].min_len = UBIFS_IDX_NODE_SZ + UBIFS_BRANCH_SZ;
|
|
|
|
|
/*
|
|
|
|
|
* Maximum indexing node size is amended later when superblock is
|
|
|
|
|
* read and the fanout is known.
|
|
|
|
|
*/
|
|
|
|
|
c->ranges[UBIFS_IDX_NODE].max_len = INT_MAX;
|
|
|
|
|
|
|
|
|
|
/*
|
2009-01-19 10:57:27 -07:00
|
|
|
|
* Initialize dead and dark LEB space watermarks. See gc.c for comments
|
|
|
|
|
* about these values.
|
2008-07-14 10:08:37 -06:00
|
|
|
|
*/
|
|
|
|
|
c->dead_wm = ALIGN(MIN_WRITE_SZ, c->min_io_size);
|
|
|
|
|
c->dark_wm = ALIGN(UBIFS_MAX_NODE_SZ, c->min_io_size);
|
|
|
|
|
|
2008-08-22 09:23:22 -06:00
|
|
|
|
/*
|
|
|
|
|
* Calculate how many bytes would be wasted at the end of LEB if it was
|
|
|
|
|
* fully filled with data nodes of maximum size. This is used in
|
|
|
|
|
* calculations when reporting free space.
|
|
|
|
|
*/
|
|
|
|
|
c->leb_overhead = c->leb_size % UBIFS_MAX_DATA_NODE_SZ;
|
2008-11-18 09:09:49 -07:00
|
|
|
|
|
2008-09-02 07:29:46 -06:00
|
|
|
|
/* Buffer size for bulk-reads */
|
2008-11-18 11:20:05 -07:00
|
|
|
|
c->max_bu_buf_len = UBIFS_MAX_BULK_READ * UBIFS_MAX_DATA_NODE_SZ;
|
|
|
|
|
if (c->max_bu_buf_len > c->leb_size)
|
|
|
|
|
c->max_bu_buf_len = c->leb_size;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* bud_wbuf_callback - bud LEB write-buffer synchronization call-back.
|
|
|
|
|
* @c: UBIFS file-system description object
|
|
|
|
|
* @lnum: LEB the write-buffer was synchronized to
|
|
|
|
|
* @free: how many free bytes left in this LEB
|
|
|
|
|
* @pad: how many bytes were padded
|
|
|
|
|
*
|
|
|
|
|
* This is a callback function which is called by the I/O unit when the
|
|
|
|
|
* write-buffer is synchronized. We need this to correctly maintain space
|
|
|
|
|
* accounting in bud logical eraseblocks. This function returns zero in case of
|
|
|
|
|
* success and a negative error code in case of failure.
|
|
|
|
|
*
|
|
|
|
|
* This function actually belongs to the journal, but we keep it here because
|
|
|
|
|
* we want to keep it static.
|
|
|
|
|
*/
|
|
|
|
|
static int bud_wbuf_callback(struct ubifs_info *c, int lnum, int free, int pad)
|
|
|
|
|
{
|
|
|
|
|
return ubifs_update_one_lp(c, lnum, free, pad, 0, 0);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
2008-12-27 10:18:00 -07:00
|
|
|
|
* init_constants_sb - initialize UBIFS constants.
|
2008-07-14 10:08:37 -06:00
|
|
|
|
* @c: UBIFS file-system description object
|
|
|
|
|
*
|
|
|
|
|
* This is a helper function which initializes various UBIFS constants after
|
|
|
|
|
* the superblock has been read. It also checks various UBIFS parameters and
|
|
|
|
|
* makes sure they are all right. Returns zero in case of success and a
|
|
|
|
|
* negative error code in case of failure.
|
|
|
|
|
*/
|
2008-12-27 10:18:00 -07:00
|
|
|
|
static int init_constants_sb(struct ubifs_info *c)
|
2008-07-14 10:08:37 -06:00
|
|
|
|
{
|
|
|
|
|
int tmp, err;
|
2008-12-18 05:06:51 -07:00
|
|
|
|
long long tmp64;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
|
|
|
|
|
c->main_bytes = (long long)c->main_lebs * c->leb_size;
|
|
|
|
|
c->max_znode_sz = sizeof(struct ubifs_znode) +
|
|
|
|
|
c->fanout * sizeof(struct ubifs_zbranch);
|
|
|
|
|
|
|
|
|
|
tmp = ubifs_idx_node_sz(c, 1);
|
|
|
|
|
c->ranges[UBIFS_IDX_NODE].min_len = tmp;
|
|
|
|
|
c->min_idx_node_sz = ALIGN(tmp, 8);
|
|
|
|
|
|
|
|
|
|
tmp = ubifs_idx_node_sz(c, c->fanout);
|
|
|
|
|
c->ranges[UBIFS_IDX_NODE].max_len = tmp;
|
|
|
|
|
c->max_idx_node_sz = ALIGN(tmp, 8);
|
|
|
|
|
|
|
|
|
|
/* Make sure LEB size is large enough to fit full commit */
|
|
|
|
|
tmp = UBIFS_CS_NODE_SZ + UBIFS_REF_NODE_SZ * c->jhead_cnt;
|
|
|
|
|
tmp = ALIGN(tmp, c->min_io_size);
|
|
|
|
|
if (tmp > c->leb_size) {
|
2012-05-16 11:11:23 -06:00
|
|
|
|
ubifs_err("too small LEB size %d, at least %d needed",
|
|
|
|
|
c->leb_size, tmp);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
return -EINVAL;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Make sure that the log is large enough to fit reference nodes for
|
|
|
|
|
* all buds plus one reserved LEB.
|
|
|
|
|
*/
|
2008-12-18 05:06:51 -07:00
|
|
|
|
tmp64 = c->max_bud_bytes + c->leb_size - 1;
|
|
|
|
|
c->max_bud_cnt = div_u64(tmp64, c->leb_size);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
tmp = (c->ref_node_alsz * c->max_bud_cnt + c->leb_size - 1);
|
|
|
|
|
tmp /= c->leb_size;
|
|
|
|
|
tmp += 1;
|
|
|
|
|
if (c->log_lebs < tmp) {
|
2012-05-16 11:11:23 -06:00
|
|
|
|
ubifs_err("too small log %d LEBs, required min. %d LEBs",
|
|
|
|
|
c->log_lebs, tmp);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
return -EINVAL;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* When budgeting we assume worst-case scenarios when the pages are not
|
|
|
|
|
* be compressed and direntries are of the maximum size.
|
|
|
|
|
*
|
|
|
|
|
* Note, data, which may be stored in inodes is budgeted separately, so
|
2011-03-29 09:04:05 -06:00
|
|
|
|
* it is not included into 'c->bi.inode_budget'.
|
2008-07-14 10:08:37 -06:00
|
|
|
|
*/
|
2011-03-29 09:04:05 -06:00
|
|
|
|
c->bi.page_budget = UBIFS_MAX_DATA_NODE_SZ * UBIFS_BLOCKS_PER_PAGE;
|
|
|
|
|
c->bi.inode_budget = UBIFS_INO_NODE_SZ;
|
|
|
|
|
c->bi.dent_budget = UBIFS_MAX_DENT_NODE_SZ;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* When the amount of flash space used by buds becomes
|
|
|
|
|
* 'c->max_bud_bytes', UBIFS just blocks all writers and starts commit.
|
|
|
|
|
* The writers are unblocked when the commit is finished. To avoid
|
|
|
|
|
* writers to be blocked UBIFS initiates background commit in advance,
|
|
|
|
|
* when number of bud bytes becomes above the limit defined below.
|
|
|
|
|
*/
|
|
|
|
|
c->bg_bud_bytes = (c->max_bud_bytes * 13) >> 4;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Ensure minimum journal size. All the bytes in the journal heads are
|
|
|
|
|
* considered to be used, when calculating the current journal usage.
|
|
|
|
|
* Consequently, if the journal is too small, UBIFS will treat it as
|
|
|
|
|
* always full.
|
|
|
|
|
*/
|
2008-12-18 05:06:51 -07:00
|
|
|
|
tmp64 = (long long)(c->jhead_cnt + 1) * c->leb_size + 1;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
if (c->bg_bud_bytes < tmp64)
|
|
|
|
|
c->bg_bud_bytes = tmp64;
|
|
|
|
|
if (c->max_bud_bytes < tmp64 + c->leb_size)
|
|
|
|
|
c->max_bud_bytes = tmp64 + c->leb_size;
|
|
|
|
|
|
|
|
|
|
err = ubifs_calc_lpt_geom(c);
|
|
|
|
|
if (err)
|
|
|
|
|
return err;
|
|
|
|
|
|
2009-03-16 01:56:57 -06:00
|
|
|
|
/* Initialize effective LEB size used in budgeting calculations */
|
|
|
|
|
c->idx_leb_size = c->leb_size - c->max_idx_node_sz;
|
2008-12-27 10:18:00 -07:00
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* init_constants_master - initialize UBIFS constants.
|
|
|
|
|
* @c: UBIFS file-system description object
|
|
|
|
|
*
|
|
|
|
|
* This is a helper function which initializes various UBIFS constants after
|
|
|
|
|
* the master node has been read. It also checks various UBIFS parameters and
|
|
|
|
|
* makes sure they are all right.
|
|
|
|
|
*/
|
|
|
|
|
static void init_constants_master(struct ubifs_info *c)
|
|
|
|
|
{
|
|
|
|
|
long long tmp64;
|
|
|
|
|
|
2011-03-29 09:04:05 -06:00
|
|
|
|
c->bi.min_idx_lebs = ubifs_calc_min_idx_lebs(c);
|
2009-03-16 01:56:57 -06:00
|
|
|
|
c->report_rp_size = ubifs_reported_space(c, c->rp_size);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Calculate total amount of FS blocks. This number is not used
|
|
|
|
|
* internally because it does not make much sense for UBIFS, but it is
|
|
|
|
|
* necessary to report something for the 'statfs()' call.
|
|
|
|
|
*
|
UBIFS: improve statfs reporting even more
Since free space we report in statfs is file size which should
fit to the FS - change the way we calculate free space and use
leb_overhead instead of dark_wm in calculations.
Results of "freespace" test (120MiB volume, 16KiB LEB size,
512 bytes page size). Before the change:
freespace: Test 1: fill the space we have 3 times
freespace: was free: 85204992 bytes 81.3 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 11284480 bytes 10.8 MiB, wrote 13.2% more than predicted
freespace: was free: 83554304 bytes 79.7 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 12935168 bytes 12.3 MiB, wrote 15.5% more than predicted
freespace: was free: 83554304 bytes 79.7 MiB, wrote: 96493568 bytes 92.0 MiB, delta: 12939264 bytes 12.3 MiB, wrote 15.5% more than predicted
freespace: Test 1 finished
freespace: Test 2: gradually lessen amount of free space and fill the FS
freespace: do 10 steps, lessen free space by 7596218 bytes 7.2 MiB each time
freespace: was free: 78675968 bytes 75.0 MiB, wrote: 88903680 bytes 84.8 MiB, delta: 10227712 bytes 9.8 MiB, wrote 13.0% more than predicted
freespace: was free: 72015872 bytes 68.7 MiB, wrote: 81514496 bytes 77.7 MiB, delta: 9498624 bytes 9.1 MiB, wrote 13.2% more than predicted
freespace: was free: 63938560 bytes 61.0 MiB, wrote: 72589312 bytes 69.2 MiB, delta: 8650752 bytes 8.2 MiB, wrote 13.5% more than predicted
freespace: was free: 56127488 bytes 53.5 MiB, wrote: 63762432 bytes 60.8 MiB, delta: 7634944 bytes 7.3 MiB, wrote 13.6% more than predicted
freespace: was free: 48336896 bytes 46.1 MiB, wrote: 54935552 bytes 52.4 MiB, delta: 6598656 bytes 6.3 MiB, wrote 13.7% more than predicted
freespace: was free: 40587264 bytes 38.7 MiB, wrote: 46157824 bytes 44.0 MiB, delta: 5570560 bytes 5.3 MiB, wrote 13.7% more than predicted
freespace: was free: 32841728 bytes 31.3 MiB, wrote: 37384192 bytes 35.7 MiB, delta: 4542464 bytes 4.3 MiB, wrote 13.8% more than predicted
freespace: was free: 25100288 bytes 23.9 MiB, wrote: 28618752 bytes 27.3 MiB, delta: 3518464 bytes 3.4 MiB, wrote 14.0% more than predicted
freespace: was free: 17342464 bytes 16.5 MiB, wrote: 19841024 bytes 18.9 MiB, delta: 2498560 bytes 2.4 MiB, wrote 14.4% more than predicted
freespace: was free: 9605120 bytes 9.2 MiB, wrote: 11063296 bytes 10.6 MiB, delta: 1458176 bytes 1.4 MiB, wrote 15.2% more than predicted
freespace: Test 2 finished
freespace: Test 3: gradually lessen amount of free space by trashing and fill the FS
freespace: do 10 steps, lessen free space by 7606272 bytes 7.3 MiB each time
freespace: trashing: was free: 83668992 bytes 79.8 MiB, need free: 7606272 bytes 7.3 MiB, files created: 248297, delete 225724 (90.9% of them)
freespace: was free: 70803456 bytes 67.5 MiB, wrote: 82485248 bytes 78.7 MiB, delta: 11681792 bytes 11.1 MiB, wrote 16.5% more than predicted
freespace: trashing: was free: 81080320 bytes 77.3 MiB, need free: 15212544 bytes 14.5 MiB, files created: 248711, delete 202047 (81.2% of them)
freespace: was free: 59867136 bytes 57.1 MiB, wrote: 71897088 bytes 68.6 MiB, delta: 12029952 bytes 11.5 MiB, wrote 20.1% more than predicted
freespace: trashing: was free: 82243584 bytes 78.4 MiB, need free: 22818816 bytes 21.8 MiB, files created: 248866, delete 179817 (72.3% of them)
freespace: was free: 50905088 bytes 48.5 MiB, wrote: 63168512 bytes 60.2 MiB, delta: 12263424 bytes 11.7 MiB, wrote 24.1% more than predicted
freespace: trashing: was free: 83402752 bytes 79.5 MiB, need free: 30425088 bytes 29.0 MiB, files created: 248920, delete 158114 (63.5% of them)
freespace: was free: 42651648 bytes 40.7 MiB, wrote: 55406592 bytes 52.8 MiB, delta: 12754944 bytes 12.2 MiB, wrote 29.9% more than predicted
freespace: trashing: was free: 84402176 bytes 80.5 MiB, need free: 38031360 bytes 36.3 MiB, files created: 248709, delete 136641 (54.9% of them)
freespace: was free: 35233792 bytes 33.6 MiB, wrote: 48250880 bytes 46.0 MiB, delta: 13017088 bytes 12.4 MiB, wrote 36.9% more than predicted
freespace: trashing: was free: 82530304 bytes 78.7 MiB, need free: 45637632 bytes 43.5 MiB, files created: 248778, delete 111208 (44.7% of them)
freespace: was free: 27287552 bytes 26.0 MiB, wrote: 40267776 bytes 38.4 MiB, delta: 12980224 bytes 12.4 MiB, wrote 47.6% more than predicted
freespace: trashing: was free: 85114880 bytes 81.2 MiB, need free: 53243904 bytes 50.8 MiB, files created: 248508, delete 93052 (37.4% of them)
freespace: was free: 22437888 bytes 21.4 MiB, wrote: 35328000 bytes 33.7 MiB, delta: 12890112 bytes 12.3 MiB, wrote 57.4% more than predicted
freespace: trashing: was free: 84103168 bytes 80.2 MiB, need free: 60850176 bytes 58.0 MiB, files created: 248637, delete 68743 (27.6% of them)
freespace: was free: 15536128 bytes 14.8 MiB, wrote: 28319744 bytes 27.0 MiB, delta: 12783616 bytes 12.2 MiB, wrote 82.3% more than predicted
freespace: trashing: was free: 84357120 bytes 80.4 MiB, need free: 68456448 bytes 65.3 MiB, files created: 248567, delete 46852 (18.8% of them)
freespace: was free: 9015296 bytes 8.6 MiB, wrote: 22044672 bytes 21.0 MiB, delta: 13029376 bytes 12.4 MiB, wrote 144.5% more than predicted
freespace: trashing: was free: 84942848 bytes 81.0 MiB, need free: 76062720 bytes 72.5 MiB, files created: 248636, delete 25993 (10.5% of them)
freespace: was free: 6086656 bytes 5.8 MiB, wrote: 8331264 bytes 7.9 MiB, delta: 2244608 bytes 2.1 MiB, wrote 36.9% more than predicted
freespace: Test 3 finished
freespace: finished successfully
After the change:
freespace: Test 1: fill the space we have 3 times
freespace: was free: 94048256 bytes 89.7 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 2441216 bytes 2.3 MiB, wrote 2.6% more than predicted
freespace: was free: 92246016 bytes 88.0 MiB, wrote: 96493568 bytes 92.0 MiB, delta: 4247552 bytes 4.1 MiB, wrote 4.6% more than predicted
freespace: was free: 92254208 bytes 88.0 MiB, wrote: 96489472 bytes 92.0 MiB, delta: 4235264 bytes 4.0 MiB, wrote 4.6% more than predicted
freespace: Test 1 finished
freespace: Test 2: gradually lessen amount of free space and fill the FS
freespace: do 10 steps, lessen free space by 8386001 bytes 8.0 MiB each time
freespace: was free: 86605824 bytes 82.6 MiB, wrote: 88252416 bytes 84.2 MiB, delta: 1646592 bytes 1.6 MiB, wrote 1.9% more than predicted
freespace: was free: 78667776 bytes 75.0 MiB, wrote: 80715776 bytes 77.0 MiB, delta: 2048000 bytes 2.0 MiB, wrote 2.6% more than predicted
freespace: was free: 69615616 bytes 66.4 MiB, wrote: 71630848 bytes 68.3 MiB, delta: 2015232 bytes 1.9 MiB, wrote 2.9% more than predicted
freespace: was free: 61018112 bytes 58.2 MiB, wrote: 62783488 bytes 59.9 MiB, delta: 1765376 bytes 1.7 MiB, wrote 2.9% more than predicted
freespace: was free: 52424704 bytes 50.0 MiB, wrote: 53968896 bytes 51.5 MiB, delta: 1544192 bytes 1.5 MiB, wrote 2.9% more than predicted
freespace: was free: 43880448 bytes 41.8 MiB, wrote: 45199360 bytes 43.1 MiB, delta: 1318912 bytes 1.3 MiB, wrote 3.0% more than predicted
freespace: was free: 35332096 bytes 33.7 MiB, wrote: 36425728 bytes 34.7 MiB, delta: 1093632 bytes 1.0 MiB, wrote 3.1% more than predicted
freespace: was free: 26771456 bytes 25.5 MiB, wrote: 27643904 bytes 26.4 MiB, delta: 872448 bytes 852.0 KiB, wrote 3.3% more than predicted
freespace: was free: 18231296 bytes 17.4 MiB, wrote: 18878464 bytes 18.0 MiB, delta: 647168 bytes 632.0 KiB, wrote 3.5% more than predicted
freespace: was free: 9674752 bytes 9.2 MiB, wrote: 10088448 bytes 9.6 MiB, delta: 413696 bytes 404.0 KiB, wrote 4.3% more than predicted
freespace: Test 2 finished
freespace: Test 3: gradually lessen amount of free space by trashing and fill the FS
freespace: do 10 steps, lessen free space by 8397544 bytes 8.0 MiB each time
freespace: trashing: was free: 92372992 bytes 88.1 MiB, need free: 8397552 bytes 8.0 MiB, files created: 248296, delete 225723 (90.9% of them)
freespace: was free: 71909376 bytes 68.6 MiB, wrote: 82472960 bytes 78.7 MiB, delta: 10563584 bytes 10.1 MiB, wrote 14.7% more than predicted
freespace: trashing: was free: 88989696 bytes 84.9 MiB, need free: 16795096 bytes 16.0 MiB, files created: 248794, delete 201838 (81.1% of them)
freespace: was free: 60354560 bytes 57.6 MiB, wrote: 71782400 bytes 68.5 MiB, delta: 11427840 bytes 10.9 MiB, wrote 18.9% more than predicted
freespace: trashing: was free: 90304512 bytes 86.1 MiB, need free: 25192640 bytes 24.0 MiB, files created: 248733, delete 179342 (72.1% of them)
freespace: was free: 51187712 bytes 48.8 MiB, wrote: 62943232 bytes 60.0 MiB, delta: 11755520 bytes 11.2 MiB, wrote 23.0% more than predicted
freespace: trashing: was free: 91209728 bytes 87.0 MiB, need free: 33590184 bytes 32.0 MiB, files created: 248779, delete 157160 (63.2% of them)
freespace: was free: 42704896 bytes 40.7 MiB, wrote: 55050240 bytes 52.5 MiB, delta: 12345344 bytes 11.8 MiB, wrote 28.9% more than predicted
freespace: trashing: was free: 92700672 bytes 88.4 MiB, need free: 41987728 bytes 40.0 MiB, files created: 248848, delete 136135 (54.7% of them)
freespace: was free: 35250176 bytes 33.6 MiB, wrote: 48115712 bytes 45.9 MiB, delta: 12865536 bytes 12.3 MiB, wrote 36.5% more than predicted
freespace: trashing: was free: 93986816 bytes 89.6 MiB, need free: 50385272 bytes 48.1 MiB, files created: 248723, delete 115385 (46.4% of them)
freespace: was free: 29995008 bytes 28.6 MiB, wrote: 41582592 bytes 39.7 MiB, delta: 11587584 bytes 11.1 MiB, wrote 38.6% more than predicted
freespace: trashing: was free: 91881472 bytes 87.6 MiB, need free: 58782816 bytes 56.1 MiB, files created: 248645, delete 89569 (36.0% of them)
freespace: was free: 22511616 bytes 21.5 MiB, wrote: 34705408 bytes 33.1 MiB, delta: 12193792 bytes 11.6 MiB, wrote 54.2% more than predicted
freespace: trashing: was free: 91774976 bytes 87.5 MiB, need free: 67180360 bytes 64.1 MiB, files created: 248580, delete 66616 (26.8% of them)
freespace: was free: 16908288 bytes 16.1 MiB, wrote: 26898432 bytes 25.7 MiB, delta: 9990144 bytes 9.5 MiB, wrote 59.1% more than predicted
freespace: trashing: was free: 92450816 bytes 88.2 MiB, need free: 75577904 bytes 72.1 MiB, files created: 248654, delete 45381 (18.3% of them)
freespace: was free: 10170368 bytes 9.7 MiB, wrote: 19111936 bytes 18.2 MiB, delta: 8941568 bytes 8.5 MiB, wrote 87.9% more than predicted
freespace: trashing: was free: 93282304 bytes 89.0 MiB, need free: 83975448 bytes 80.1 MiB, files created: 248513, delete 24794 (10.0% of them)
freespace: was free: 3911680 bytes 3.7 MiB, wrote: 7872512 bytes 7.5 MiB, delta: 3960832 bytes 3.8 MiB, wrote 101.3% more than predicted
freespace: Test 3 finished
freespace: finished successfully
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2008-08-25 09:58:19 -06:00
|
|
|
|
* Subtract the LEB reserved for GC, the LEB which is reserved for
|
2008-12-19 10:26:29 -07:00
|
|
|
|
* deletions, minimum LEBs for the index, and assume only one journal
|
|
|
|
|
* head is available.
|
2008-07-14 10:08:37 -06:00
|
|
|
|
*/
|
2008-12-19 10:26:29 -07:00
|
|
|
|
tmp64 = c->main_lebs - 1 - 1 - MIN_INDEX_LEBS - c->jhead_cnt + 1;
|
2008-12-18 05:06:51 -07:00
|
|
|
|
tmp64 *= (long long)c->leb_size - c->leb_overhead;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
tmp64 = ubifs_reported_space(c, tmp64);
|
|
|
|
|
c->block_cnt = tmp64 >> UBIFS_BLOCK_SHIFT;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* take_gc_lnum - reserve GC LEB.
|
|
|
|
|
* @c: UBIFS file-system description object
|
|
|
|
|
*
|
2009-01-23 09:23:03 -07:00
|
|
|
|
* This function ensures that the LEB reserved for garbage collection is marked
|
|
|
|
|
* as "taken" in lprops. We also have to set free space to LEB size and dirty
|
|
|
|
|
* space to zero, because lprops may contain out-of-date information if the
|
|
|
|
|
* file-system was un-mounted before it has been committed. This function
|
|
|
|
|
* returns zero in case of success and a negative error code in case of
|
|
|
|
|
* failure.
|
2008-07-14 10:08:37 -06:00
|
|
|
|
*/
|
|
|
|
|
static int take_gc_lnum(struct ubifs_info *c)
|
|
|
|
|
{
|
|
|
|
|
int err;
|
|
|
|
|
|
|
|
|
|
if (c->gc_lnum == -1) {
|
|
|
|
|
ubifs_err("no LEB for GC");
|
|
|
|
|
return -EINVAL;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* And we have to tell lprops that this LEB is taken */
|
|
|
|
|
err = ubifs_change_one_lp(c, c->gc_lnum, c->leb_size, 0,
|
|
|
|
|
LPROPS_TAKEN, 0, 0);
|
|
|
|
|
return err;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* alloc_wbufs - allocate write-buffers.
|
|
|
|
|
* @c: UBIFS file-system description object
|
|
|
|
|
*
|
|
|
|
|
* This helper function allocates and initializes UBIFS write-buffers. Returns
|
|
|
|
|
* zero in case of success and %-ENOMEM in case of failure.
|
|
|
|
|
*/
|
|
|
|
|
static int alloc_wbufs(struct ubifs_info *c)
|
|
|
|
|
{
|
|
|
|
|
int i, err;
|
|
|
|
|
|
2014-06-23 10:41:23 -06:00
|
|
|
|
c->jheads = kcalloc(c->jhead_cnt, sizeof(struct ubifs_jhead),
|
|
|
|
|
GFP_KERNEL);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
if (!c->jheads)
|
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
|
|
/* Initialize journal heads */
|
|
|
|
|
for (i = 0; i < c->jhead_cnt; i++) {
|
|
|
|
|
INIT_LIST_HEAD(&c->jheads[i].buds_list);
|
|
|
|
|
err = ubifs_wbuf_init(c, &c->jheads[i].wbuf);
|
|
|
|
|
if (err)
|
|
|
|
|
return err;
|
|
|
|
|
|
|
|
|
|
c->jheads[i].wbuf.sync_callback = &bud_wbuf_callback;
|
|
|
|
|
c->jheads[i].wbuf.jhead = i;
|
2011-05-25 23:26:05 -06:00
|
|
|
|
c->jheads[i].grouped = 1;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
2012-05-14 10:49:35 -06:00
|
|
|
|
* Garbage Collector head does not need to be synchronized by timer.
|
|
|
|
|
* Also GC head nodes are not grouped.
|
2008-07-14 10:08:37 -06:00
|
|
|
|
*/
|
2009-06-23 03:30:43 -06:00
|
|
|
|
c->jheads[GCHD].wbuf.no_timer = 1;
|
2011-05-25 23:26:05 -06:00
|
|
|
|
c->jheads[GCHD].grouped = 0;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* free_wbufs - free write-buffers.
|
|
|
|
|
* @c: UBIFS file-system description object
|
|
|
|
|
*/
|
|
|
|
|
static void free_wbufs(struct ubifs_info *c)
|
|
|
|
|
{
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
if (c->jheads) {
|
|
|
|
|
for (i = 0; i < c->jhead_cnt; i++) {
|
|
|
|
|
kfree(c->jheads[i].wbuf.buf);
|
|
|
|
|
kfree(c->jheads[i].wbuf.inodes);
|
|
|
|
|
}
|
|
|
|
|
kfree(c->jheads);
|
|
|
|
|
c->jheads = NULL;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* free_orphans - free orphans.
|
|
|
|
|
* @c: UBIFS file-system description object
|
|
|
|
|
*/
|
|
|
|
|
static void free_orphans(struct ubifs_info *c)
|
|
|
|
|
{
|
|
|
|
|
struct ubifs_orphan *orph;
|
|
|
|
|
|
|
|
|
|
while (c->orph_dnext) {
|
|
|
|
|
orph = c->orph_dnext;
|
|
|
|
|
c->orph_dnext = orph->dnext;
|
|
|
|
|
list_del(&orph->list);
|
|
|
|
|
kfree(orph);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
while (!list_empty(&c->orph_list)) {
|
|
|
|
|
orph = list_entry(c->orph_list.next, struct ubifs_orphan, list);
|
|
|
|
|
list_del(&orph->list);
|
|
|
|
|
kfree(orph);
|
2012-05-16 11:11:23 -06:00
|
|
|
|
ubifs_err("orphan list not empty at unmount");
|
2008-07-14 10:08:37 -06:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
vfree(c->orph_buf);
|
|
|
|
|
c->orph_buf = NULL;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* free_buds - free per-bud objects.
|
|
|
|
|
* @c: UBIFS file-system description object
|
|
|
|
|
*/
|
|
|
|
|
static void free_buds(struct ubifs_info *c)
|
|
|
|
|
{
|
2014-01-23 16:56:08 -07:00
|
|
|
|
struct ubifs_bud *bud, *n;
|
|
|
|
|
|
|
|
|
|
rbtree_postorder_for_each_entry_safe(bud, n, &c->buds, rb)
|
|
|
|
|
kfree(bud);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* check_volume_empty - check if the UBI volume is empty.
|
|
|
|
|
* @c: UBIFS file-system description object
|
|
|
|
|
*
|
|
|
|
|
* This function checks if the UBIFS volume is empty by looking if its LEBs are
|
|
|
|
|
* mapped or not. The result of checking is stored in the @c->empty variable.
|
|
|
|
|
* Returns zero in case of success and a negative error code in case of
|
|
|
|
|
* failure.
|
|
|
|
|
*/
|
|
|
|
|
static int check_volume_empty(struct ubifs_info *c)
|
|
|
|
|
{
|
|
|
|
|
int lnum, err;
|
|
|
|
|
|
|
|
|
|
c->empty = 1;
|
|
|
|
|
for (lnum = 0; lnum < c->leb_cnt; lnum++) {
|
2011-06-03 05:22:05 -06:00
|
|
|
|
err = ubifs_is_mapped(c, lnum);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
if (unlikely(err < 0))
|
|
|
|
|
return err;
|
|
|
|
|
if (err == 1) {
|
|
|
|
|
c->empty = 0;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
cond_resched();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* UBIFS mount options.
|
|
|
|
|
*
|
|
|
|
|
* Opt_fast_unmount: do not run a journal commit before un-mounting
|
|
|
|
|
* Opt_norm_unmount: run a journal commit before un-mounting
|
2008-09-02 07:29:46 -06:00
|
|
|
|
* Opt_bulk_read: enable bulk-reads
|
|
|
|
|
* Opt_no_bulk_read: disable bulk-reads
|
2008-09-04 07:26:00 -06:00
|
|
|
|
* Opt_chk_data_crc: check CRCs when reading data nodes
|
|
|
|
|
* Opt_no_chk_data_crc: do not check CRCs when reading data nodes
|
2008-11-01 06:57:49 -06:00
|
|
|
|
* Opt_override_compr: override default compressor
|
2008-07-14 10:08:37 -06:00
|
|
|
|
* Opt_err: just end of array marker
|
|
|
|
|
*/
|
|
|
|
|
enum {
|
|
|
|
|
Opt_fast_unmount,
|
|
|
|
|
Opt_norm_unmount,
|
2008-09-02 07:29:46 -06:00
|
|
|
|
Opt_bulk_read,
|
|
|
|
|
Opt_no_bulk_read,
|
2008-09-04 07:26:00 -06:00
|
|
|
|
Opt_chk_data_crc,
|
|
|
|
|
Opt_no_chk_data_crc,
|
2008-11-01 06:57:49 -06:00
|
|
|
|
Opt_override_compr,
|
2008-07-14 10:08:37 -06:00
|
|
|
|
Opt_err,
|
|
|
|
|
};
|
|
|
|
|
|
2008-10-13 03:46:57 -06:00
|
|
|
|
static const match_table_t tokens = {
|
2008-07-14 10:08:37 -06:00
|
|
|
|
{Opt_fast_unmount, "fast_unmount"},
|
|
|
|
|
{Opt_norm_unmount, "norm_unmount"},
|
2008-09-02 07:29:46 -06:00
|
|
|
|
{Opt_bulk_read, "bulk_read"},
|
|
|
|
|
{Opt_no_bulk_read, "no_bulk_read"},
|
2008-09-04 07:26:00 -06:00
|
|
|
|
{Opt_chk_data_crc, "chk_data_crc"},
|
|
|
|
|
{Opt_no_chk_data_crc, "no_chk_data_crc"},
|
2008-11-01 06:57:49 -06:00
|
|
|
|
{Opt_override_compr, "compr=%s"},
|
2008-07-14 10:08:37 -06:00
|
|
|
|
{Opt_err, NULL},
|
|
|
|
|
};
|
|
|
|
|
|
2009-05-29 03:34:52 -06:00
|
|
|
|
/**
|
|
|
|
|
* parse_standard_option - parse a standard mount option.
|
|
|
|
|
* @option: the option to parse
|
|
|
|
|
*
|
|
|
|
|
* Normally, standard mount options like "sync" are passed to file-systems as
|
|
|
|
|
* flags. However, when a "rootflags=" kernel boot parameter is used, they may
|
|
|
|
|
* be present in the options string. This function tries to deal with this
|
|
|
|
|
* situation and parse standard options. Returns 0 if the option was not
|
|
|
|
|
* recognized, and the corresponding integer flag if it was.
|
|
|
|
|
*
|
|
|
|
|
* UBIFS is only interested in the "sync" option, so do not check for anything
|
|
|
|
|
* else.
|
|
|
|
|
*/
|
|
|
|
|
static int parse_standard_option(const char *option)
|
|
|
|
|
{
|
|
|
|
|
ubifs_msg("parse %s", option);
|
|
|
|
|
if (!strcmp(option, "sync"))
|
|
|
|
|
return MS_SYNCHRONOUS;
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
2008-07-14 10:08:37 -06:00
|
|
|
|
/**
|
|
|
|
|
* ubifs_parse_options - parse mount parameters.
|
|
|
|
|
* @c: UBIFS file-system description object
|
|
|
|
|
* @options: parameters to parse
|
|
|
|
|
* @is_remount: non-zero if this is FS re-mount
|
|
|
|
|
*
|
|
|
|
|
* This function parses UBIFS mount options and returns zero in case success
|
|
|
|
|
* and a negative error code in case of failure.
|
|
|
|
|
*/
|
|
|
|
|
static int ubifs_parse_options(struct ubifs_info *c, char *options,
|
|
|
|
|
int is_remount)
|
|
|
|
|
{
|
|
|
|
|
char *p;
|
|
|
|
|
substring_t args[MAX_OPT_ARGS];
|
|
|
|
|
|
|
|
|
|
if (!options)
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
while ((p = strsep(&options, ","))) {
|
|
|
|
|
int token;
|
|
|
|
|
|
|
|
|
|
if (!*p)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
token = match_token(p, tokens, args);
|
|
|
|
|
switch (token) {
|
2009-01-29 07:34:30 -07:00
|
|
|
|
/*
|
|
|
|
|
* %Opt_fast_unmount and %Opt_norm_unmount options are ignored.
|
2009-06-23 11:30:32 -06:00
|
|
|
|
* We accept them in order to be backward-compatible. But this
|
2009-01-29 07:34:30 -07:00
|
|
|
|
* should be removed at some point.
|
|
|
|
|
*/
|
2008-07-14 10:08:37 -06:00
|
|
|
|
case Opt_fast_unmount:
|
|
|
|
|
c->mount_opts.unmount_mode = 2;
|
|
|
|
|
break;
|
|
|
|
|
case Opt_norm_unmount:
|
|
|
|
|
c->mount_opts.unmount_mode = 1;
|
|
|
|
|
break;
|
2008-09-02 07:29:46 -06:00
|
|
|
|
case Opt_bulk_read:
|
|
|
|
|
c->mount_opts.bulk_read = 2;
|
|
|
|
|
c->bulk_read = 1;
|
|
|
|
|
break;
|
|
|
|
|
case Opt_no_bulk_read:
|
|
|
|
|
c->mount_opts.bulk_read = 1;
|
|
|
|
|
c->bulk_read = 0;
|
|
|
|
|
break;
|
2008-09-04 07:26:00 -06:00
|
|
|
|
case Opt_chk_data_crc:
|
|
|
|
|
c->mount_opts.chk_data_crc = 2;
|
|
|
|
|
c->no_chk_data_crc = 0;
|
|
|
|
|
break;
|
|
|
|
|
case Opt_no_chk_data_crc:
|
|
|
|
|
c->mount_opts.chk_data_crc = 1;
|
|
|
|
|
c->no_chk_data_crc = 1;
|
|
|
|
|
break;
|
2008-11-01 06:57:49 -06:00
|
|
|
|
case Opt_override_compr:
|
|
|
|
|
{
|
|
|
|
|
char *name = match_strdup(&args[0]);
|
|
|
|
|
|
|
|
|
|
if (!name)
|
|
|
|
|
return -ENOMEM;
|
|
|
|
|
if (!strcmp(name, "none"))
|
|
|
|
|
c->mount_opts.compr_type = UBIFS_COMPR_NONE;
|
|
|
|
|
else if (!strcmp(name, "lzo"))
|
|
|
|
|
c->mount_opts.compr_type = UBIFS_COMPR_LZO;
|
|
|
|
|
else if (!strcmp(name, "zlib"))
|
|
|
|
|
c->mount_opts.compr_type = UBIFS_COMPR_ZLIB;
|
|
|
|
|
else {
|
|
|
|
|
ubifs_err("unknown compressor \"%s\"", name);
|
|
|
|
|
kfree(name);
|
|
|
|
|
return -EINVAL;
|
|
|
|
|
}
|
|
|
|
|
kfree(name);
|
|
|
|
|
c->mount_opts.override_compr = 1;
|
|
|
|
|
c->default_compr = c->mount_opts.compr_type;
|
|
|
|
|
break;
|
|
|
|
|
}
|
2008-07-14 10:08:37 -06:00
|
|
|
|
default:
|
2009-05-29 03:34:52 -06:00
|
|
|
|
{
|
|
|
|
|
unsigned long flag;
|
|
|
|
|
struct super_block *sb = c->vfs_sb;
|
|
|
|
|
|
|
|
|
|
flag = parse_standard_option(p);
|
|
|
|
|
if (!flag) {
|
2012-08-27 04:34:09 -06:00
|
|
|
|
ubifs_err("unrecognized mount option \"%s\" or missing value",
|
|
|
|
|
p);
|
2009-05-29 03:34:52 -06:00
|
|
|
|
return -EINVAL;
|
|
|
|
|
}
|
|
|
|
|
sb->s_flags |= flag;
|
|
|
|
|
break;
|
|
|
|
|
}
|
2008-07-14 10:08:37 -06:00
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* destroy_journal - destroy journal data structures.
|
|
|
|
|
* @c: UBIFS file-system description object
|
|
|
|
|
*
|
|
|
|
|
* This function destroys journal data structures including those that may have
|
|
|
|
|
* been created by recovery functions.
|
|
|
|
|
*/
|
|
|
|
|
static void destroy_journal(struct ubifs_info *c)
|
|
|
|
|
{
|
|
|
|
|
while (!list_empty(&c->unclean_leb_list)) {
|
|
|
|
|
struct ubifs_unclean_leb *ucleb;
|
|
|
|
|
|
|
|
|
|
ucleb = list_entry(c->unclean_leb_list.next,
|
|
|
|
|
struct ubifs_unclean_leb, list);
|
|
|
|
|
list_del(&ucleb->list);
|
|
|
|
|
kfree(ucleb);
|
|
|
|
|
}
|
|
|
|
|
while (!list_empty(&c->old_buds)) {
|
|
|
|
|
struct ubifs_bud *bud;
|
|
|
|
|
|
|
|
|
|
bud = list_entry(c->old_buds.next, struct ubifs_bud, list);
|
|
|
|
|
list_del(&bud->list);
|
|
|
|
|
kfree(bud);
|
|
|
|
|
}
|
|
|
|
|
ubifs_destroy_idx_gc(c);
|
|
|
|
|
ubifs_destroy_size_tree(c);
|
|
|
|
|
ubifs_tnc_close(c);
|
|
|
|
|
free_buds(c);
|
|
|
|
|
}
|
|
|
|
|
|
2008-11-19 02:53:15 -07:00
|
|
|
|
/**
|
|
|
|
|
* bu_init - initialize bulk-read information.
|
|
|
|
|
* @c: UBIFS file-system description object
|
|
|
|
|
*/
|
|
|
|
|
static void bu_init(struct ubifs_info *c)
|
|
|
|
|
{
|
|
|
|
|
ubifs_assert(c->bulk_read == 1);
|
|
|
|
|
|
|
|
|
|
if (c->bu.buf)
|
|
|
|
|
return; /* Already initialized */
|
|
|
|
|
|
|
|
|
|
again:
|
|
|
|
|
c->bu.buf = kmalloc(c->max_bu_buf_len, GFP_KERNEL | __GFP_NOWARN);
|
|
|
|
|
if (!c->bu.buf) {
|
|
|
|
|
if (c->max_bu_buf_len > UBIFS_KMALLOC_OK) {
|
|
|
|
|
c->max_bu_buf_len = UBIFS_KMALLOC_OK;
|
|
|
|
|
goto again;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Just disable bulk-read */
|
2012-08-27 04:34:09 -06:00
|
|
|
|
ubifs_warn("cannot allocate %d bytes of memory for bulk-read, disabling it",
|
|
|
|
|
c->max_bu_buf_len);
|
2008-11-19 02:53:15 -07:00
|
|
|
|
c->mount_opts.bulk_read = 1;
|
|
|
|
|
c->bulk_read = 0;
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
2008-12-30 07:23:34 -07:00
|
|
|
|
/**
|
|
|
|
|
* check_free_space - check if there is enough free space to mount.
|
|
|
|
|
* @c: UBIFS file-system description object
|
|
|
|
|
*
|
|
|
|
|
* This function makes sure UBIFS has enough free space to be mounted in
|
|
|
|
|
* read/write mode. UBIFS must always have some free space to allow deletions.
|
|
|
|
|
*/
|
|
|
|
|
static int check_free_space(struct ubifs_info *c)
|
|
|
|
|
{
|
|
|
|
|
ubifs_assert(c->dark_wm > 0);
|
|
|
|
|
if (c->lst.total_free + c->lst.total_dirty < c->dark_wm) {
|
2011-03-25 07:27:40 -06:00
|
|
|
|
ubifs_err("insufficient free space to mount in R/W mode");
|
2012-05-16 10:15:56 -06:00
|
|
|
|
ubifs_dump_budg(c, &c->bi);
|
|
|
|
|
ubifs_dump_lprops(c);
|
2009-01-29 07:22:54 -07:00
|
|
|
|
return -ENOSPC;
|
2008-12-30 07:23:34 -07:00
|
|
|
|
}
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
2008-07-14 10:08:37 -06:00
|
|
|
|
/**
|
|
|
|
|
* mount_ubifs - mount UBIFS file-system.
|
|
|
|
|
* @c: UBIFS file-system description object
|
|
|
|
|
*
|
|
|
|
|
* This function mounts UBIFS file system. Returns zero in case of success and
|
|
|
|
|
* a negative error code in case of failure.
|
|
|
|
|
*/
|
|
|
|
|
static int mount_ubifs(struct ubifs_info *c)
|
|
|
|
|
{
|
2010-09-19 09:34:26 -06:00
|
|
|
|
int err;
|
2012-08-27 07:56:58 -06:00
|
|
|
|
long long x, y;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
size_t sz;
|
|
|
|
|
|
2010-09-19 09:34:26 -06:00
|
|
|
|
c->ro_mount = !!(c->vfs_sb->s_flags & MS_RDONLY);
|
2014-06-02 07:51:10 -06:00
|
|
|
|
/* Suppress error messages while probing if MS_SILENT is set */
|
|
|
|
|
c->probing = !!(c->vfs_sb->s_flags & MS_SILENT);
|
|
|
|
|
|
2008-07-14 10:08:37 -06:00
|
|
|
|
err = init_constants_early(c);
|
|
|
|
|
if (err)
|
|
|
|
|
return err;
|
|
|
|
|
|
2008-10-17 04:31:39 -06:00
|
|
|
|
err = ubifs_debugging_init(c);
|
|
|
|
|
if (err)
|
|
|
|
|
return err;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
|
|
|
|
|
err = check_volume_empty(c);
|
|
|
|
|
if (err)
|
|
|
|
|
goto out_free;
|
|
|
|
|
|
2010-09-19 09:34:26 -06:00
|
|
|
|
if (c->empty && (c->ro_mount || c->ro_media)) {
|
2008-07-14 10:08:37 -06:00
|
|
|
|
/*
|
|
|
|
|
* This UBI volume is empty, and read-only, or the file system
|
|
|
|
|
* is mounted read-only - we cannot format it.
|
|
|
|
|
*/
|
|
|
|
|
ubifs_err("can't format empty UBI volume: read-only %s",
|
|
|
|
|
c->ro_media ? "UBI volume" : "mount");
|
|
|
|
|
err = -EROFS;
|
|
|
|
|
goto out_free;
|
|
|
|
|
}
|
|
|
|
|
|
2010-09-19 09:34:26 -06:00
|
|
|
|
if (c->ro_media && !c->ro_mount) {
|
2008-07-14 10:08:37 -06:00
|
|
|
|
ubifs_err("cannot mount read-write - read-only media");
|
|
|
|
|
err = -EROFS;
|
|
|
|
|
goto out_free;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* The requirement for the buffer is that it should fit indexing B-tree
|
|
|
|
|
* height amount of integers. We assume the height if the TNC tree will
|
|
|
|
|
* never exceed 64.
|
|
|
|
|
*/
|
|
|
|
|
err = -ENOMEM;
|
|
|
|
|
c->bottom_up_buf = kmalloc(BOTTOM_UP_HEIGHT * sizeof(int), GFP_KERNEL);
|
|
|
|
|
if (!c->bottom_up_buf)
|
|
|
|
|
goto out_free;
|
|
|
|
|
|
|
|
|
|
c->sbuf = vmalloc(c->leb_size);
|
|
|
|
|
if (!c->sbuf)
|
|
|
|
|
goto out_free;
|
|
|
|
|
|
2010-09-19 09:34:26 -06:00
|
|
|
|
if (!c->ro_mount) {
|
2008-07-14 10:08:37 -06:00
|
|
|
|
c->ileb_buf = vmalloc(c->leb_size);
|
|
|
|
|
if (!c->ileb_buf)
|
|
|
|
|
goto out_free;
|
|
|
|
|
}
|
|
|
|
|
|
2008-11-19 02:53:15 -07:00
|
|
|
|
if (c->bulk_read == 1)
|
|
|
|
|
bu_init(c);
|
|
|
|
|
|
2011-03-04 15:55:02 -07:00
|
|
|
|
if (!c->ro_mount) {
|
|
|
|
|
c->write_reserve_buf = kmalloc(COMPRESSED_DATA_NODE_BUF_SZ,
|
|
|
|
|
GFP_KERNEL);
|
|
|
|
|
if (!c->write_reserve_buf)
|
|
|
|
|
goto out_free;
|
|
|
|
|
}
|
|
|
|
|
|
2011-01-17 13:27:56 -07:00
|
|
|
|
c->mounting = 1;
|
2008-09-04 07:26:00 -06:00
|
|
|
|
|
2008-07-14 10:08:37 -06:00
|
|
|
|
err = ubifs_read_superblock(c);
|
|
|
|
|
if (err)
|
|
|
|
|
goto out_free;
|
|
|
|
|
|
2014-06-02 07:51:10 -06:00
|
|
|
|
c->probing = 0;
|
|
|
|
|
|
2008-07-14 10:08:37 -06:00
|
|
|
|
/*
|
2008-11-01 06:57:49 -06:00
|
|
|
|
* Make sure the compressor which is set as default in the superblock
|
2008-12-30 07:23:34 -07:00
|
|
|
|
* or overridden by mount options is actually compiled in.
|
2008-07-14 10:08:37 -06:00
|
|
|
|
*/
|
|
|
|
|
if (!ubifs_compr_present(c->default_compr)) {
|
2008-11-01 06:57:49 -06:00
|
|
|
|
ubifs_err("'compressor \"%s\" is not compiled in",
|
|
|
|
|
ubifs_compr_name(c->default_compr));
|
2009-05-25 00:49:10 -06:00
|
|
|
|
err = -ENOTSUPP;
|
2008-11-01 06:57:49 -06:00
|
|
|
|
goto out_free;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
}
|
|
|
|
|
|
2008-12-27 10:18:00 -07:00
|
|
|
|
err = init_constants_sb(c);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
if (err)
|
2008-10-17 04:31:39 -06:00
|
|
|
|
goto out_free;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
|
|
|
|
|
sz = ALIGN(c->max_idx_node_sz, c->min_io_size);
|
|
|
|
|
sz = ALIGN(sz + c->max_idx_node_sz, c->min_io_size);
|
|
|
|
|
c->cbuf = kmalloc(sz, GFP_NOFS);
|
|
|
|
|
if (!c->cbuf) {
|
|
|
|
|
err = -ENOMEM;
|
2008-10-17 04:31:39 -06:00
|
|
|
|
goto out_free;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
}
|
|
|
|
|
|
UBIFS: do not free write-buffers when in R/O mode
Currently UBIFS has a small optimization - it frees write-buffers when it is
re-mounted from R/W mode to R/O mode. Of course, when it is mounted R/O, it
does not allocate write-buffers as well.
This optimization is nice but it leads to subtle problems and complications
in recovery, which I can reproduce using the integck test. The symptoms are
that after a power cut the file-system cannot be mounted if we first mount
it R/O, and then re-mount R/W - 'ubifs_rcvry_gc_commit()' prints:
UBIFS error (pid 34456): could not find an empty LEB
Analysis of the problem.
When mounting R/W, the reply process sets journal heads to buds [1], but
when mounting R/O - it does not do this, because the write-buffers are not
allocated. So 'ubifs_rcvry_gc_commit()' works completely differently for the
same file-system but for the following 2 cases:
1. mounting R/W after a power cut and recover
2. mounting R/O after a power cut, re-mounting R/W and run deferred recovery
In the former case, we have journal heads seeked to the a bud, in the latter
case, they are non-seeked (wbuf->lnum == -1). So in the latter case we do not
try to recover the GC LEB by garbage-collecting to the GC head, but we just
try to find an empty LEB, and there may be no empty LEBs, so we just fail.
On the other hand, in the former case (mount R/W), we are able to make a GC LEB
(@c->gc_lnum) by garbage-collecting.
Thus, let's remove this small nice optimization and always allocate
write-buffers. This should not make too big difference - we have only 3
of them, each of max. write unit size, which is usually 2KiB. So this is
about 6KiB of RAM for the typical case, and only when mounted R/O.
[1]: Note, currently the replay process is setting (seeking) the journal heads
to _some_ buds, not necessarily to the buds which had been the journal heads
before the power cut happened. This will be fixed separately.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Cc: stable@kernel.org
2011-04-25 09:17:09 -06:00
|
|
|
|
err = alloc_wbufs(c);
|
|
|
|
|
if (err)
|
|
|
|
|
goto out_cbuf;
|
|
|
|
|
|
2008-09-09 03:17:29 -06:00
|
|
|
|
sprintf(c->bgt_name, BGT_NAME_PATTERN, c->vi.ubi_num, c->vi.vol_id);
|
2010-09-19 09:34:26 -06:00
|
|
|
|
if (!c->ro_mount) {
|
2008-07-14 10:08:37 -06:00
|
|
|
|
/* Create background thread */
|
2009-03-18 05:29:39 -06:00
|
|
|
|
c->bgt = kthread_create(ubifs_bg_thread, c, "%s", c->bgt_name);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
if (IS_ERR(c->bgt)) {
|
|
|
|
|
err = PTR_ERR(c->bgt);
|
|
|
|
|
c->bgt = NULL;
|
|
|
|
|
ubifs_err("cannot spawn \"%s\", error %d",
|
|
|
|
|
c->bgt_name, err);
|
|
|
|
|
goto out_wbufs;
|
|
|
|
|
}
|
|
|
|
|
wake_up_process(c->bgt);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
err = ubifs_read_master(c);
|
|
|
|
|
if (err)
|
|
|
|
|
goto out_master;
|
|
|
|
|
|
2011-05-30 12:56:16 -06:00
|
|
|
|
init_constants_master(c);
|
|
|
|
|
|
2008-07-14 10:08:37 -06:00
|
|
|
|
if ((c->mst_node->flags & cpu_to_le32(UBIFS_MST_DIRTY)) != 0) {
|
|
|
|
|
ubifs_msg("recovery needed");
|
|
|
|
|
c->need_recovery = 1;
|
2011-05-30 12:56:15 -06:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (c->need_recovery && !c->ro_mount) {
|
|
|
|
|
err = ubifs_recover_inl_heads(c, c->sbuf);
|
|
|
|
|
if (err)
|
|
|
|
|
goto out_master;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
err = ubifs_lpt_init(c, 1, !c->ro_mount);
|
|
|
|
|
if (err)
|
|
|
|
|
goto out_master;
|
|
|
|
|
|
2011-05-30 12:56:16 -06:00
|
|
|
|
if (!c->ro_mount && c->space_fixup) {
|
|
|
|
|
err = ubifs_fixup_free_space(c);
|
|
|
|
|
if (err)
|
2012-05-18 05:32:37 -06:00
|
|
|
|
goto out_lpt;
|
2011-05-30 12:56:16 -06:00
|
|
|
|
}
|
|
|
|
|
|
2011-05-30 12:56:15 -06:00
|
|
|
|
if (!c->ro_mount) {
|
2008-07-14 10:08:37 -06:00
|
|
|
|
/*
|
|
|
|
|
* Set the "dirty" flag so that if we reboot uncleanly we
|
|
|
|
|
* will notice this immediately on the next mount.
|
|
|
|
|
*/
|
|
|
|
|
c->mst_node->flags |= cpu_to_le32(UBIFS_MST_DIRTY);
|
|
|
|
|
err = ubifs_write_master(c);
|
|
|
|
|
if (err)
|
2011-05-30 12:56:15 -06:00
|
|
|
|
goto out_lpt;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
}
|
|
|
|
|
|
2011-03-29 09:04:05 -06:00
|
|
|
|
err = dbg_check_idx_size(c, c->bi.old_idx_sz);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
if (err)
|
|
|
|
|
goto out_lpt;
|
|
|
|
|
|
|
|
|
|
err = ubifs_replay_journal(c);
|
|
|
|
|
if (err)
|
|
|
|
|
goto out_journal;
|
|
|
|
|
|
2009-06-28 09:31:58 -06:00
|
|
|
|
/* Calculate 'min_idx_lebs' after journal replay */
|
2011-03-29 09:04:05 -06:00
|
|
|
|
c->bi.min_idx_lebs = ubifs_calc_min_idx_lebs(c);
|
2009-06-28 09:31:58 -06:00
|
|
|
|
|
2010-09-19 09:34:26 -06:00
|
|
|
|
err = ubifs_mount_orphans(c, c->need_recovery, c->ro_mount);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
if (err)
|
|
|
|
|
goto out_orphans;
|
|
|
|
|
|
2010-09-19 09:34:26 -06:00
|
|
|
|
if (!c->ro_mount) {
|
2008-07-14 10:08:37 -06:00
|
|
|
|
int lnum;
|
|
|
|
|
|
2008-12-30 07:23:34 -07:00
|
|
|
|
err = check_free_space(c);
|
|
|
|
|
if (err)
|
2008-07-14 10:08:37 -06:00
|
|
|
|
goto out_orphans;
|
|
|
|
|
|
|
|
|
|
/* Check for enough log space */
|
|
|
|
|
lnum = c->lhead_lnum + 1;
|
|
|
|
|
if (lnum >= UBIFS_LOG_LNUM + c->log_lebs)
|
|
|
|
|
lnum = UBIFS_LOG_LNUM;
|
|
|
|
|
if (lnum == c->ltail_lnum) {
|
|
|
|
|
err = ubifs_consolidate_log(c);
|
|
|
|
|
if (err)
|
|
|
|
|
goto out_orphans;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (c->need_recovery) {
|
|
|
|
|
err = ubifs_recover_size(c);
|
|
|
|
|
if (err)
|
|
|
|
|
goto out_orphans;
|
|
|
|
|
err = ubifs_rcvry_gc_commit(c);
|
2010-05-23 05:16:13 -06:00
|
|
|
|
if (err)
|
|
|
|
|
goto out_orphans;
|
2009-01-23 09:23:03 -07:00
|
|
|
|
} else {
|
2008-07-14 10:08:37 -06:00
|
|
|
|
err = take_gc_lnum(c);
|
2009-01-23 09:23:03 -07:00
|
|
|
|
if (err)
|
|
|
|
|
goto out_orphans;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* GC LEB may contain garbage if there was an unclean
|
|
|
|
|
* reboot, and it should be un-mapped.
|
|
|
|
|
*/
|
|
|
|
|
err = ubifs_leb_unmap(c, c->gc_lnum);
|
|
|
|
|
if (err)
|
2010-08-02 03:36:06 -06:00
|
|
|
|
goto out_orphans;
|
2009-01-23 09:23:03 -07:00
|
|
|
|
}
|
2008-07-14 10:08:37 -06:00
|
|
|
|
|
|
|
|
|
err = dbg_check_lprops(c);
|
|
|
|
|
if (err)
|
|
|
|
|
goto out_orphans;
|
|
|
|
|
} else if (c->need_recovery) {
|
|
|
|
|
err = ubifs_recover_size(c);
|
|
|
|
|
if (err)
|
|
|
|
|
goto out_orphans;
|
2009-01-23 09:23:03 -07:00
|
|
|
|
} else {
|
|
|
|
|
/*
|
|
|
|
|
* Even if we mount read-only, we have to set space in GC LEB
|
|
|
|
|
* to proper value because this affects UBIFS free space
|
|
|
|
|
* reporting. We do not want to have a situation when
|
|
|
|
|
* re-mounting from R/O to R/W changes amount of free space.
|
|
|
|
|
*/
|
|
|
|
|
err = take_gc_lnum(c);
|
|
|
|
|
if (err)
|
|
|
|
|
goto out_orphans;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
spin_lock(&ubifs_infos_lock);
|
|
|
|
|
list_add_tail(&c->infos_list, &ubifs_infos);
|
|
|
|
|
spin_unlock(&ubifs_infos_lock);
|
|
|
|
|
|
|
|
|
|
if (c->need_recovery) {
|
2010-09-19 09:34:26 -06:00
|
|
|
|
if (c->ro_mount)
|
2008-07-14 10:08:37 -06:00
|
|
|
|
ubifs_msg("recovery deferred");
|
|
|
|
|
else {
|
|
|
|
|
c->need_recovery = 0;
|
|
|
|
|
ubifs_msg("recovery completed");
|
2009-03-15 09:20:22 -06:00
|
|
|
|
/*
|
|
|
|
|
* GC LEB has to be empty and taken at this point. But
|
|
|
|
|
* the journal head LEBs may also be accounted as
|
|
|
|
|
* "empty taken" if they are empty.
|
|
|
|
|
*/
|
|
|
|
|
ubifs_assert(c->lst.taken_empty_lebs > 0);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
}
|
2009-01-26 07:12:20 -07:00
|
|
|
|
} else
|
2009-03-15 09:20:22 -06:00
|
|
|
|
ubifs_assert(c->lst.taken_empty_lebs > 0);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
|
2009-01-26 07:12:20 -07:00
|
|
|
|
err = dbg_check_filesystem(c);
|
2008-10-23 02:49:28 -06:00
|
|
|
|
if (err)
|
|
|
|
|
goto out_infos;
|
|
|
|
|
|
2009-01-26 07:12:20 -07:00
|
|
|
|
err = dbg_debugfs_init_fs(c);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
if (err)
|
|
|
|
|
goto out_infos;
|
|
|
|
|
|
2011-01-17 13:27:56 -07:00
|
|
|
|
c->mounting = 0;
|
2008-09-04 07:26:00 -06:00
|
|
|
|
|
2012-08-27 07:56:58 -06:00
|
|
|
|
ubifs_msg("mounted UBI device %d, volume %d, name \"%s\"%s",
|
|
|
|
|
c->vi.ubi_num, c->vi.vol_id, c->vi.name,
|
2013-04-02 04:24:37 -06:00
|
|
|
|
c->ro_mount ? ", R/O mode" : "");
|
2008-07-14 10:08:37 -06:00
|
|
|
|
x = (long long)c->main_lebs * c->leb_size;
|
2012-08-27 07:56:58 -06:00
|
|
|
|
y = (long long)c->log_lebs * c->leb_size + c->max_bud_bytes;
|
|
|
|
|
ubifs_msg("LEB size: %d bytes (%d KiB), min./max. I/O unit sizes: %d bytes/%d bytes",
|
|
|
|
|
c->leb_size, c->leb_size >> 10, c->min_io_size,
|
|
|
|
|
c->max_write_size);
|
|
|
|
|
ubifs_msg("FS size: %lld bytes (%lld MiB, %d LEBs), journal size %lld bytes (%lld MiB, %d LEBs)",
|
|
|
|
|
x, x >> 20, c->main_lebs,
|
|
|
|
|
y, y >> 20, c->log_lebs + c->max_bud_cnt);
|
|
|
|
|
ubifs_msg("reserved for root: %llu bytes (%llu KiB)",
|
|
|
|
|
c->report_rp_size, c->report_rp_size >> 10);
|
|
|
|
|
ubifs_msg("media format: w%d/r%d (latest is w%d/r%d), UUID %pUB%s",
|
2009-03-26 04:51:21 -06:00
|
|
|
|
c->fmt_version, c->ro_compat_version,
|
2012-08-27 07:56:58 -06:00
|
|
|
|
UBIFS_FORMAT_VERSION, UBIFS_RO_COMPAT_VERSION, c->uuid,
|
|
|
|
|
c->big_lpt ? ", big LPT model" : ", small LPT model");
|
|
|
|
|
|
|
|
|
|
dbg_gen("default compressor: %s", ubifs_compr_name(c->default_compr));
|
|
|
|
|
dbg_gen("data journal heads: %d",
|
2008-07-14 10:08:37 -06:00
|
|
|
|
c->jhead_cnt - NONDATA_JHEADS_CNT);
|
2012-08-27 07:56:58 -06:00
|
|
|
|
dbg_gen("log LEBs: %d (%d - %d)",
|
2008-07-14 10:08:37 -06:00
|
|
|
|
c->log_lebs, UBIFS_LOG_LNUM, c->log_last);
|
2012-08-27 07:56:58 -06:00
|
|
|
|
dbg_gen("LPT area LEBs: %d (%d - %d)",
|
2008-07-14 10:08:37 -06:00
|
|
|
|
c->lpt_lebs, c->lpt_first, c->lpt_last);
|
2012-08-27 07:56:58 -06:00
|
|
|
|
dbg_gen("orphan area LEBs: %d (%d - %d)",
|
2008-07-14 10:08:37 -06:00
|
|
|
|
c->orph_lebs, c->orph_first, c->orph_last);
|
2012-08-27 07:56:58 -06:00
|
|
|
|
dbg_gen("main area LEBs: %d (%d - %d)",
|
2008-07-14 10:08:37 -06:00
|
|
|
|
c->main_lebs, c->main_first, c->leb_cnt - 1);
|
2012-08-27 07:56:58 -06:00
|
|
|
|
dbg_gen("index LEBs: %d", c->lst.idx_lebs);
|
|
|
|
|
dbg_gen("total index bytes: %lld (%lld KiB, %lld MiB)",
|
2011-03-29 09:04:05 -06:00
|
|
|
|
c->bi.old_idx_sz, c->bi.old_idx_sz >> 10,
|
|
|
|
|
c->bi.old_idx_sz >> 20);
|
2012-08-27 07:56:58 -06:00
|
|
|
|
dbg_gen("key hash type: %d", c->key_hash_type);
|
|
|
|
|
dbg_gen("tree fanout: %d", c->fanout);
|
|
|
|
|
dbg_gen("reserved GC LEB: %d", c->gc_lnum);
|
|
|
|
|
dbg_gen("max. znode size %d", c->max_znode_sz);
|
|
|
|
|
dbg_gen("max. index node size %d", c->max_idx_node_sz);
|
|
|
|
|
dbg_gen("node sizes: data %zu, inode %zu, dentry %zu",
|
2008-12-30 09:37:45 -07:00
|
|
|
|
UBIFS_DATA_NODE_SZ, UBIFS_INO_NODE_SZ, UBIFS_DENT_NODE_SZ);
|
2012-08-27 07:56:58 -06:00
|
|
|
|
dbg_gen("node sizes: trun %zu, sb %zu, master %zu",
|
2008-12-30 09:37:45 -07:00
|
|
|
|
UBIFS_TRUN_NODE_SZ, UBIFS_SB_NODE_SZ, UBIFS_MST_NODE_SZ);
|
2012-08-27 07:56:58 -06:00
|
|
|
|
dbg_gen("node sizes: ref %zu, cmt. start %zu, orph %zu",
|
2008-12-30 09:37:45 -07:00
|
|
|
|
UBIFS_REF_NODE_SZ, UBIFS_CS_NODE_SZ, UBIFS_ORPH_NODE_SZ);
|
2012-08-27 07:56:58 -06:00
|
|
|
|
dbg_gen("max. node sizes: data %zu, inode %zu dentry %zu, idx %d",
|
2011-03-25 07:27:40 -06:00
|
|
|
|
UBIFS_MAX_DATA_NODE_SZ, UBIFS_MAX_INO_NODE_SZ,
|
2011-03-08 05:26:47 -07:00
|
|
|
|
UBIFS_MAX_DENT_NODE_SZ, ubifs_idx_node_sz(c, c->fanout));
|
2012-08-27 07:56:58 -06:00
|
|
|
|
dbg_gen("dead watermark: %d", c->dead_wm);
|
|
|
|
|
dbg_gen("dark watermark: %d", c->dark_wm);
|
|
|
|
|
dbg_gen("LEB overhead: %d", c->leb_overhead);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
x = (long long)c->main_lebs * c->dark_wm;
|
2012-08-27 07:56:58 -06:00
|
|
|
|
dbg_gen("max. dark space: %lld (%lld KiB, %lld MiB)",
|
2008-07-14 10:08:37 -06:00
|
|
|
|
x, x >> 10, x >> 20);
|
2012-08-27 07:56:58 -06:00
|
|
|
|
dbg_gen("maximum bud bytes: %lld (%lld KiB, %lld MiB)",
|
2008-07-14 10:08:37 -06:00
|
|
|
|
c->max_bud_bytes, c->max_bud_bytes >> 10,
|
|
|
|
|
c->max_bud_bytes >> 20);
|
2012-08-27 07:56:58 -06:00
|
|
|
|
dbg_gen("BG commit bud bytes: %lld (%lld KiB, %lld MiB)",
|
2008-07-14 10:08:37 -06:00
|
|
|
|
c->bg_bud_bytes, c->bg_bud_bytes >> 10,
|
|
|
|
|
c->bg_bud_bytes >> 20);
|
2012-08-27 07:56:58 -06:00
|
|
|
|
dbg_gen("current bud bytes %lld (%lld KiB, %lld MiB)",
|
2008-07-14 10:08:37 -06:00
|
|
|
|
c->bud_bytes, c->bud_bytes >> 10, c->bud_bytes >> 20);
|
2012-08-27 07:56:58 -06:00
|
|
|
|
dbg_gen("max. seq. number: %llu", c->max_sqnum);
|
|
|
|
|
dbg_gen("commit number: %llu", c->cmt_no);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
out_infos:
|
|
|
|
|
spin_lock(&ubifs_infos_lock);
|
|
|
|
|
list_del(&c->infos_list);
|
|
|
|
|
spin_unlock(&ubifs_infos_lock);
|
|
|
|
|
out_orphans:
|
|
|
|
|
free_orphans(c);
|
|
|
|
|
out_journal:
|
|
|
|
|
destroy_journal(c);
|
|
|
|
|
out_lpt:
|
|
|
|
|
ubifs_lpt_free(c, 0);
|
|
|
|
|
out_master:
|
|
|
|
|
kfree(c->mst_node);
|
|
|
|
|
kfree(c->rcvrd_mst_node);
|
|
|
|
|
if (c->bgt)
|
|
|
|
|
kthread_stop(c->bgt);
|
|
|
|
|
out_wbufs:
|
|
|
|
|
free_wbufs(c);
|
|
|
|
|
out_cbuf:
|
|
|
|
|
kfree(c->cbuf);
|
|
|
|
|
out_free:
|
2011-03-04 15:55:02 -07:00
|
|
|
|
kfree(c->write_reserve_buf);
|
2008-11-19 02:53:15 -07:00
|
|
|
|
kfree(c->bu.buf);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
vfree(c->ileb_buf);
|
|
|
|
|
vfree(c->sbuf);
|
|
|
|
|
kfree(c->bottom_up_buf);
|
2008-10-17 04:31:39 -06:00
|
|
|
|
ubifs_debugging_exit(c);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
return err;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* ubifs_umount - un-mount UBIFS file-system.
|
|
|
|
|
* @c: UBIFS file-system description object
|
|
|
|
|
*
|
|
|
|
|
* Note, this function is called to free allocated resourced when un-mounting,
|
|
|
|
|
* as well as free resources when an error occurred while we were half way
|
|
|
|
|
* through mounting (error path cleanup function). So it has to make sure the
|
|
|
|
|
* resource was actually allocated before freeing it.
|
|
|
|
|
*/
|
|
|
|
|
static void ubifs_umount(struct ubifs_info *c)
|
|
|
|
|
{
|
|
|
|
|
dbg_gen("un-mounting UBI device %d, volume %d", c->vi.ubi_num,
|
|
|
|
|
c->vi.vol_id);
|
|
|
|
|
|
2008-10-23 02:49:28 -06:00
|
|
|
|
dbg_debugfs_exit_fs(c);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
spin_lock(&ubifs_infos_lock);
|
|
|
|
|
list_del(&c->infos_list);
|
|
|
|
|
spin_unlock(&ubifs_infos_lock);
|
|
|
|
|
|
|
|
|
|
if (c->bgt)
|
|
|
|
|
kthread_stop(c->bgt);
|
|
|
|
|
|
|
|
|
|
destroy_journal(c);
|
|
|
|
|
free_wbufs(c);
|
|
|
|
|
free_orphans(c);
|
|
|
|
|
ubifs_lpt_free(c, 0);
|
|
|
|
|
|
|
|
|
|
kfree(c->cbuf);
|
|
|
|
|
kfree(c->rcvrd_mst_node);
|
|
|
|
|
kfree(c->mst_node);
|
2011-03-04 15:55:02 -07:00
|
|
|
|
kfree(c->write_reserve_buf);
|
2008-11-19 02:53:15 -07:00
|
|
|
|
kfree(c->bu.buf);
|
|
|
|
|
vfree(c->ileb_buf);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
vfree(c->sbuf);
|
|
|
|
|
kfree(c->bottom_up_buf);
|
2008-10-17 04:31:39 -06:00
|
|
|
|
ubifs_debugging_exit(c);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* ubifs_remount_rw - re-mount in read-write mode.
|
|
|
|
|
* @c: UBIFS file-system description object
|
|
|
|
|
*
|
|
|
|
|
* UBIFS avoids allocating many unnecessary resources when mounted in read-only
|
|
|
|
|
* mode. This function allocates the needed resources and re-mounts UBIFS in
|
|
|
|
|
* read-write mode.
|
|
|
|
|
*/
|
|
|
|
|
static int ubifs_remount_rw(struct ubifs_info *c)
|
|
|
|
|
{
|
|
|
|
|
int err, lnum;
|
|
|
|
|
|
2009-03-26 04:51:21 -06:00
|
|
|
|
if (c->rw_incompat) {
|
|
|
|
|
ubifs_err("the file-system is not R/W-compatible");
|
2012-08-27 04:34:09 -06:00
|
|
|
|
ubifs_msg("on-flash format version is w%d/r%d, but software only supports up to version w%d/r%d",
|
|
|
|
|
c->fmt_version, c->ro_compat_version,
|
|
|
|
|
UBIFS_FORMAT_VERSION, UBIFS_RO_COMPAT_VERSION);
|
2009-03-26 04:51:21 -06:00
|
|
|
|
return -EROFS;
|
|
|
|
|
}
|
|
|
|
|
|
2008-07-14 10:08:37 -06:00
|
|
|
|
mutex_lock(&c->umount_mutex);
|
2009-01-23 05:54:59 -07:00
|
|
|
|
dbg_save_space_info(c);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
c->remounting_rw = 1;
|
2011-03-29 00:45:21 -06:00
|
|
|
|
c->ro_mount = 0;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
|
2013-03-14 02:49:23 -06:00
|
|
|
|
if (c->space_fixup) {
|
|
|
|
|
err = ubifs_fixup_free_space(c);
|
|
|
|
|
if (err)
|
2014-04-07 04:39:06 -06:00
|
|
|
|
goto out;
|
2013-03-14 02:49:23 -06:00
|
|
|
|
}
|
|
|
|
|
|
2008-12-30 07:23:34 -07:00
|
|
|
|
err = check_free_space(c);
|
|
|
|
|
if (err)
|
2008-07-14 10:08:37 -06:00
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
|
|
if (c->old_leb_cnt != c->leb_cnt) {
|
|
|
|
|
struct ubifs_sb_node *sup;
|
|
|
|
|
|
|
|
|
|
sup = ubifs_read_sb_node(c);
|
|
|
|
|
if (IS_ERR(sup)) {
|
|
|
|
|
err = PTR_ERR(sup);
|
|
|
|
|
goto out;
|
|
|
|
|
}
|
|
|
|
|
sup->leb_cnt = cpu_to_le32(c->leb_cnt);
|
|
|
|
|
err = ubifs_write_sb_node(c, sup);
|
2011-05-06 08:08:56 -06:00
|
|
|
|
kfree(sup);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
if (err)
|
|
|
|
|
goto out;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (c->need_recovery) {
|
|
|
|
|
ubifs_msg("completing deferred recovery");
|
|
|
|
|
err = ubifs_write_rcvrd_mst_node(c);
|
|
|
|
|
if (err)
|
|
|
|
|
goto out;
|
|
|
|
|
err = ubifs_recover_size(c);
|
|
|
|
|
if (err)
|
|
|
|
|
goto out;
|
|
|
|
|
err = ubifs_clean_lebs(c, c->sbuf);
|
|
|
|
|
if (err)
|
|
|
|
|
goto out;
|
|
|
|
|
err = ubifs_recover_inl_heads(c, c->sbuf);
|
|
|
|
|
if (err)
|
|
|
|
|
goto out;
|
2009-01-26 01:55:40 -07:00
|
|
|
|
} else {
|
|
|
|
|
/* A readonly mount is not allowed to have orphans */
|
|
|
|
|
ubifs_assert(c->tot_orphans == 0);
|
|
|
|
|
err = ubifs_clear_orphans(c);
|
|
|
|
|
if (err)
|
|
|
|
|
goto out;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (!(c->mst_node->flags & cpu_to_le32(UBIFS_MST_DIRTY))) {
|
|
|
|
|
c->mst_node->flags |= cpu_to_le32(UBIFS_MST_DIRTY);
|
|
|
|
|
err = ubifs_write_master(c);
|
|
|
|
|
if (err)
|
|
|
|
|
goto out;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
c->ileb_buf = vmalloc(c->leb_size);
|
|
|
|
|
if (!c->ileb_buf) {
|
|
|
|
|
err = -ENOMEM;
|
|
|
|
|
goto out;
|
|
|
|
|
}
|
|
|
|
|
|
2011-03-04 15:55:02 -07:00
|
|
|
|
c->write_reserve_buf = kmalloc(COMPRESSED_DATA_NODE_BUF_SZ, GFP_KERNEL);
|
2013-06-06 20:17:22 -06:00
|
|
|
|
if (!c->write_reserve_buf) {
|
|
|
|
|
err = -ENOMEM;
|
2011-03-04 15:55:02 -07:00
|
|
|
|
goto out;
|
2013-06-06 20:17:22 -06:00
|
|
|
|
}
|
2011-03-04 15:55:02 -07:00
|
|
|
|
|
2008-07-14 10:08:37 -06:00
|
|
|
|
err = ubifs_lpt_init(c, 0, 1);
|
|
|
|
|
if (err)
|
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
|
|
/* Create background thread */
|
2009-03-18 05:29:39 -06:00
|
|
|
|
c->bgt = kthread_create(ubifs_bg_thread, c, "%s", c->bgt_name);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
if (IS_ERR(c->bgt)) {
|
|
|
|
|
err = PTR_ERR(c->bgt);
|
|
|
|
|
c->bgt = NULL;
|
|
|
|
|
ubifs_err("cannot spawn \"%s\", error %d",
|
|
|
|
|
c->bgt_name, err);
|
2008-09-04 07:26:00 -06:00
|
|
|
|
goto out;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
}
|
|
|
|
|
wake_up_process(c->bgt);
|
|
|
|
|
|
|
|
|
|
c->orph_buf = vmalloc(c->leb_size);
|
2008-09-04 07:26:00 -06:00
|
|
|
|
if (!c->orph_buf) {
|
|
|
|
|
err = -ENOMEM;
|
|
|
|
|
goto out;
|
|
|
|
|
}
|
2008-07-14 10:08:37 -06:00
|
|
|
|
|
|
|
|
|
/* Check for enough log space */
|
|
|
|
|
lnum = c->lhead_lnum + 1;
|
|
|
|
|
if (lnum >= UBIFS_LOG_LNUM + c->log_lebs)
|
|
|
|
|
lnum = UBIFS_LOG_LNUM;
|
|
|
|
|
if (lnum == c->ltail_lnum) {
|
|
|
|
|
err = ubifs_consolidate_log(c);
|
|
|
|
|
if (err)
|
|
|
|
|
goto out;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (c->need_recovery)
|
|
|
|
|
err = ubifs_rcvry_gc_commit(c);
|
|
|
|
|
else
|
2009-01-23 09:23:03 -07:00
|
|
|
|
err = ubifs_leb_unmap(c, c->gc_lnum);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
if (err)
|
|
|
|
|
goto out;
|
|
|
|
|
|
2011-04-20 09:02:45 -06:00
|
|
|
|
dbg_gen("re-mounted read-write");
|
|
|
|
|
c->remounting_rw = 0;
|
|
|
|
|
|
2008-07-14 10:08:37 -06:00
|
|
|
|
if (c->need_recovery) {
|
|
|
|
|
c->need_recovery = 0;
|
|
|
|
|
ubifs_msg("deferred recovery completed");
|
2011-04-20 09:02:45 -06:00
|
|
|
|
} else {
|
|
|
|
|
/*
|
|
|
|
|
* Do not run the debugging space check if the were doing
|
|
|
|
|
* recovery, because when we saved the information we had the
|
|
|
|
|
* file-system in a state where the TNC and lprops has been
|
|
|
|
|
* modified in memory, but all the I/O operations (including a
|
|
|
|
|
* commit) were deferred. So the file-system was in
|
|
|
|
|
* "non-committed" state. Now the file-system is in committed
|
|
|
|
|
* state, and of course the amount of free space will change
|
|
|
|
|
* because, for example, the old index size was imprecise.
|
|
|
|
|
*/
|
|
|
|
|
err = dbg_check_space_info(c);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
}
|
2011-05-06 16:58:23 -06:00
|
|
|
|
|
2008-07-14 10:08:37 -06:00
|
|
|
|
mutex_unlock(&c->umount_mutex);
|
2009-01-23 05:54:59 -07:00
|
|
|
|
return err;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
|
|
|
|
|
out:
|
2011-03-29 00:45:21 -06:00
|
|
|
|
c->ro_mount = 1;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
vfree(c->orph_buf);
|
|
|
|
|
c->orph_buf = NULL;
|
|
|
|
|
if (c->bgt) {
|
|
|
|
|
kthread_stop(c->bgt);
|
|
|
|
|
c->bgt = NULL;
|
|
|
|
|
}
|
|
|
|
|
free_wbufs(c);
|
2011-03-04 15:55:02 -07:00
|
|
|
|
kfree(c->write_reserve_buf);
|
|
|
|
|
c->write_reserve_buf = NULL;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
vfree(c->ileb_buf);
|
|
|
|
|
c->ileb_buf = NULL;
|
|
|
|
|
ubifs_lpt_free(c, 1);
|
|
|
|
|
c->remounting_rw = 0;
|
|
|
|
|
mutex_unlock(&c->umount_mutex);
|
|
|
|
|
return err;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* ubifs_remount_ro - re-mount in read-only mode.
|
|
|
|
|
* @c: UBIFS file-system description object
|
|
|
|
|
*
|
2009-01-23 05:54:59 -07:00
|
|
|
|
* We assume VFS has stopped writing. Possibly the background thread could be
|
|
|
|
|
* running a commit, however kthread_stop will wait in that case.
|
2008-07-14 10:08:37 -06:00
|
|
|
|
*/
|
|
|
|
|
static void ubifs_remount_ro(struct ubifs_info *c)
|
|
|
|
|
{
|
|
|
|
|
int i, err;
|
|
|
|
|
|
|
|
|
|
ubifs_assert(!c->need_recovery);
|
2010-09-19 09:34:26 -06:00
|
|
|
|
ubifs_assert(!c->ro_mount);
|
2009-01-23 05:17:36 -07:00
|
|
|
|
|
2008-07-14 10:08:37 -06:00
|
|
|
|
mutex_lock(&c->umount_mutex);
|
|
|
|
|
if (c->bgt) {
|
|
|
|
|
kthread_stop(c->bgt);
|
|
|
|
|
c->bgt = NULL;
|
|
|
|
|
}
|
|
|
|
|
|
2009-01-23 05:54:59 -07:00
|
|
|
|
dbg_save_space_info(c);
|
|
|
|
|
|
2010-10-17 23:28:50 -06:00
|
|
|
|
for (i = 0; i < c->jhead_cnt; i++)
|
2008-07-14 10:08:37 -06:00
|
|
|
|
ubifs_wbuf_sync(&c->jheads[i].wbuf);
|
|
|
|
|
|
2009-01-23 05:17:36 -07:00
|
|
|
|
c->mst_node->flags &= ~cpu_to_le32(UBIFS_MST_DIRTY);
|
|
|
|
|
c->mst_node->flags |= cpu_to_le32(UBIFS_MST_NO_ORPHS);
|
|
|
|
|
c->mst_node->gc_lnum = cpu_to_le32(c->gc_lnum);
|
|
|
|
|
err = ubifs_write_master(c);
|
|
|
|
|
if (err)
|
|
|
|
|
ubifs_ro_mode(c, err);
|
|
|
|
|
|
2008-07-14 10:08:37 -06:00
|
|
|
|
vfree(c->orph_buf);
|
|
|
|
|
c->orph_buf = NULL;
|
2011-03-04 15:55:02 -07:00
|
|
|
|
kfree(c->write_reserve_buf);
|
|
|
|
|
c->write_reserve_buf = NULL;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
vfree(c->ileb_buf);
|
|
|
|
|
c->ileb_buf = NULL;
|
|
|
|
|
ubifs_lpt_free(c, 1);
|
2010-09-19 09:34:26 -06:00
|
|
|
|
c->ro_mount = 1;
|
2009-01-23 05:54:59 -07:00
|
|
|
|
err = dbg_check_space_info(c);
|
|
|
|
|
if (err)
|
|
|
|
|
ubifs_ro_mode(c, err);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
mutex_unlock(&c->umount_mutex);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void ubifs_put_super(struct super_block *sb)
|
|
|
|
|
{
|
|
|
|
|
int i;
|
|
|
|
|
struct ubifs_info *c = sb->s_fs_info;
|
|
|
|
|
|
|
|
|
|
ubifs_msg("un-mount UBI device %d, volume %d", c->vi.ubi_num,
|
|
|
|
|
c->vi.vol_id);
|
push BKL down into ->put_super
Move BKL into ->put_super from the only caller. A couple of
filesystems had trivial enough ->put_super (only kfree and NULLing of
s_fs_info + stuff in there) to not get any locking: coda, cramfs, efs,
hugetlbfs, omfs, qnx4, shmem, all others got the full treatment. Most
of them probably don't need it, but I'd rather sort that out individually.
Preferably after all the other BKL pushdowns in that area.
[AV: original used to move lock_super() down as well; these changes are
removed since we don't do lock_super() at all in generic_shutdown_super()
now]
[AV: fuse, btrfs and xfs are known to need no damn BKL, exempt]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-05-05 07:40:36 -06:00
|
|
|
|
|
2008-07-14 10:08:37 -06:00
|
|
|
|
/*
|
|
|
|
|
* The following asserts are only valid if there has not been a failure
|
|
|
|
|
* of the media. For example, there will be dirty inodes if we failed
|
|
|
|
|
* to write them back because of I/O errors.
|
|
|
|
|
*/
|
2011-04-21 01:39:54 -06:00
|
|
|
|
if (!c->ro_error) {
|
2011-03-29 09:04:05 -06:00
|
|
|
|
ubifs_assert(c->bi.idx_growth == 0);
|
|
|
|
|
ubifs_assert(c->bi.dd_growth == 0);
|
|
|
|
|
ubifs_assert(c->bi.data_growth == 0);
|
2011-04-21 01:39:54 -06:00
|
|
|
|
}
|
2008-07-14 10:08:37 -06:00
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* The 'c->umount_lock' prevents races between UBIFS memory shrinker
|
|
|
|
|
* and file system un-mount. Namely, it prevents the shrinker from
|
|
|
|
|
* picking this superblock for shrinking - it will be just skipped if
|
|
|
|
|
* the mutex is locked.
|
|
|
|
|
*/
|
|
|
|
|
mutex_lock(&c->umount_mutex);
|
2010-09-19 09:34:26 -06:00
|
|
|
|
if (!c->ro_mount) {
|
2008-07-14 10:08:37 -06:00
|
|
|
|
/*
|
|
|
|
|
* First of all kill the background thread to make sure it does
|
|
|
|
|
* not interfere with un-mounting and freeing resources.
|
|
|
|
|
*/
|
|
|
|
|
if (c->bgt) {
|
|
|
|
|
kthread_stop(c->bgt);
|
|
|
|
|
c->bgt = NULL;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
UBIFS: introduce new flag for RO due to errors
The R/O state may have various reasons:
1. The UBI volume is R/O
2. The FS is mounted R/O
3. The FS switched to R/O mode because of an error
However, in UBIFS we have only one variable which represents cases
1 and 3 - 'c->ro_media'. Indeed, we set this to 1 if we switch to
R/O mode due to an error, and then we test it in many places to
make sure that we stop writing as soon as the error happens.
But this is very unclean. One consequence of this, for example, is
that in 'ubifs_remount_fs()' we use 'c->ro_media' to check whether
we are in R/O mode because on an error, and we print a message
in this case. However, if we are in R/O mode because the media
is R/O, our message is bogus.
This patch introduces new flag - 'c->ro_error' which is set when
we switch to R/O mode because of an error. It also changes all
"if (c->ro_media)" checks to "if (c->ro_error)" checks, because
this is what the checks actually mean. We do not need to check
for 'c->ro_media' because if the UBI volume is in R/O mode, we
do not allow R/W mounting, and now writes can happen. This is
guaranteed by VFS. But it is good to double-check this, so this
patch also adds many "ubifs_assert(!c->ro_media)" checks.
In the 'ubifs_remount_fs()' function this patch makes a bit more
changes - it fixes the error messages as well.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2010-09-17 07:44:28 -06:00
|
|
|
|
* On fatal errors c->ro_error is set to 1, in which case we do
|
2008-07-14 10:08:37 -06:00
|
|
|
|
* not write the master node.
|
|
|
|
|
*/
|
UBIFS: introduce new flag for RO due to errors
The R/O state may have various reasons:
1. The UBI volume is R/O
2. The FS is mounted R/O
3. The FS switched to R/O mode because of an error
However, in UBIFS we have only one variable which represents cases
1 and 3 - 'c->ro_media'. Indeed, we set this to 1 if we switch to
R/O mode due to an error, and then we test it in many places to
make sure that we stop writing as soon as the error happens.
But this is very unclean. One consequence of this, for example, is
that in 'ubifs_remount_fs()' we use 'c->ro_media' to check whether
we are in R/O mode because on an error, and we print a message
in this case. However, if we are in R/O mode because the media
is R/O, our message is bogus.
This patch introduces new flag - 'c->ro_error' which is set when
we switch to R/O mode because of an error. It also changes all
"if (c->ro_media)" checks to "if (c->ro_error)" checks, because
this is what the checks actually mean. We do not need to check
for 'c->ro_media' because if the UBI volume is in R/O mode, we
do not allow R/W mounting, and now writes can happen. This is
guaranteed by VFS. But it is good to double-check this, so this
patch also adds many "ubifs_assert(!c->ro_media)" checks.
In the 'ubifs_remount_fs()' function this patch makes a bit more
changes - it fixes the error messages as well.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2010-09-17 07:44:28 -06:00
|
|
|
|
if (!c->ro_error) {
|
2010-09-19 09:34:26 -06:00
|
|
|
|
int err;
|
|
|
|
|
|
|
|
|
|
/* Synchronize write-buffers */
|
2010-10-17 23:28:50 -06:00
|
|
|
|
for (i = 0; i < c->jhead_cnt; i++)
|
|
|
|
|
ubifs_wbuf_sync(&c->jheads[i].wbuf);
|
2010-09-19 09:34:26 -06:00
|
|
|
|
|
2008-07-14 10:08:37 -06:00
|
|
|
|
/*
|
|
|
|
|
* We are being cleanly unmounted which means the
|
|
|
|
|
* orphans were killed - indicate this in the master
|
|
|
|
|
* node. Also save the reserved GC LEB number.
|
|
|
|
|
*/
|
|
|
|
|
c->mst_node->flags &= ~cpu_to_le32(UBIFS_MST_DIRTY);
|
|
|
|
|
c->mst_node->flags |= cpu_to_le32(UBIFS_MST_NO_ORPHS);
|
|
|
|
|
c->mst_node->gc_lnum = cpu_to_le32(c->gc_lnum);
|
|
|
|
|
err = ubifs_write_master(c);
|
|
|
|
|
if (err)
|
|
|
|
|
/*
|
|
|
|
|
* Recovery will attempt to fix the master area
|
|
|
|
|
* next mount, so we just print a message and
|
|
|
|
|
* continue to unmount normally.
|
|
|
|
|
*/
|
2012-08-27 04:34:09 -06:00
|
|
|
|
ubifs_err("failed to write master node, error %d",
|
|
|
|
|
err);
|
2010-10-17 23:32:35 -06:00
|
|
|
|
} else {
|
|
|
|
|
for (i = 0; i < c->jhead_cnt; i++)
|
|
|
|
|
/* Make sure write-buffer timers are canceled */
|
|
|
|
|
hrtimer_cancel(&c->jheads[i].wbuf.timer);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
ubifs_umount(c);
|
|
|
|
|
bdi_destroy(&c->bdi);
|
|
|
|
|
ubi_close_volume(c->ubi);
|
|
|
|
|
mutex_unlock(&c->umount_mutex);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int ubifs_remount_fs(struct super_block *sb, int *flags, char *data)
|
|
|
|
|
{
|
|
|
|
|
int err;
|
|
|
|
|
struct ubifs_info *c = sb->s_fs_info;
|
|
|
|
|
|
2014-03-13 08:14:33 -06:00
|
|
|
|
sync_filesystem(sb);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
dbg_gen("old flags %#lx, new flags %#x", sb->s_flags, *flags);
|
|
|
|
|
|
|
|
|
|
err = ubifs_parse_options(c, data, 1);
|
|
|
|
|
if (err) {
|
|
|
|
|
ubifs_err("invalid or unknown remount parameter");
|
|
|
|
|
return err;
|
|
|
|
|
}
|
2008-11-19 02:53:15 -07:00
|
|
|
|
|
2010-09-19 09:34:26 -06:00
|
|
|
|
if (c->ro_mount && !(*flags & MS_RDONLY)) {
|
UBIFS: introduce new flag for RO due to errors
The R/O state may have various reasons:
1. The UBI volume is R/O
2. The FS is mounted R/O
3. The FS switched to R/O mode because of an error
However, in UBIFS we have only one variable which represents cases
1 and 3 - 'c->ro_media'. Indeed, we set this to 1 if we switch to
R/O mode due to an error, and then we test it in many places to
make sure that we stop writing as soon as the error happens.
But this is very unclean. One consequence of this, for example, is
that in 'ubifs_remount_fs()' we use 'c->ro_media' to check whether
we are in R/O mode because on an error, and we print a message
in this case. However, if we are in R/O mode because the media
is R/O, our message is bogus.
This patch introduces new flag - 'c->ro_error' which is set when
we switch to R/O mode because of an error. It also changes all
"if (c->ro_media)" checks to "if (c->ro_error)" checks, because
this is what the checks actually mean. We do not need to check
for 'c->ro_media' because if the UBI volume is in R/O mode, we
do not allow R/W mounting, and now writes can happen. This is
guaranteed by VFS. But it is good to double-check this, so this
patch also adds many "ubifs_assert(!c->ro_media)" checks.
In the 'ubifs_remount_fs()' function this patch makes a bit more
changes - it fixes the error messages as well.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2010-09-17 07:44:28 -06:00
|
|
|
|
if (c->ro_error) {
|
|
|
|
|
ubifs_msg("cannot re-mount R/W due to prior errors");
|
|
|
|
|
return -EROFS;
|
|
|
|
|
}
|
2009-01-23 05:17:36 -07:00
|
|
|
|
if (c->ro_media) {
|
UBIFS: introduce new flag for RO due to errors
The R/O state may have various reasons:
1. The UBI volume is R/O
2. The FS is mounted R/O
3. The FS switched to R/O mode because of an error
However, in UBIFS we have only one variable which represents cases
1 and 3 - 'c->ro_media'. Indeed, we set this to 1 if we switch to
R/O mode due to an error, and then we test it in many places to
make sure that we stop writing as soon as the error happens.
But this is very unclean. One consequence of this, for example, is
that in 'ubifs_remount_fs()' we use 'c->ro_media' to check whether
we are in R/O mode because on an error, and we print a message
in this case. However, if we are in R/O mode because the media
is R/O, our message is bogus.
This patch introduces new flag - 'c->ro_error' which is set when
we switch to R/O mode because of an error. It also changes all
"if (c->ro_media)" checks to "if (c->ro_error)" checks, because
this is what the checks actually mean. We do not need to check
for 'c->ro_media' because if the UBI volume is in R/O mode, we
do not allow R/W mounting, and now writes can happen. This is
guaranteed by VFS. But it is good to double-check this, so this
patch also adds many "ubifs_assert(!c->ro_media)" checks.
In the 'ubifs_remount_fs()' function this patch makes a bit more
changes - it fixes the error messages as well.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2010-09-17 07:44:28 -06:00
|
|
|
|
ubifs_msg("cannot re-mount R/W - UBI volume is R/O");
|
2009-01-29 07:22:54 -07:00
|
|
|
|
return -EROFS;
|
2009-01-23 05:17:36 -07:00
|
|
|
|
}
|
2008-07-14 10:08:37 -06:00
|
|
|
|
err = ubifs_remount_rw(c);
|
2009-07-19 04:51:04 -06:00
|
|
|
|
if (err)
|
2008-07-14 10:08:37 -06:00
|
|
|
|
return err;
|
2010-09-19 09:34:26 -06:00
|
|
|
|
} else if (!c->ro_mount && (*flags & MS_RDONLY)) {
|
UBIFS: introduce new flag for RO due to errors
The R/O state may have various reasons:
1. The UBI volume is R/O
2. The FS is mounted R/O
3. The FS switched to R/O mode because of an error
However, in UBIFS we have only one variable which represents cases
1 and 3 - 'c->ro_media'. Indeed, we set this to 1 if we switch to
R/O mode due to an error, and then we test it in many places to
make sure that we stop writing as soon as the error happens.
But this is very unclean. One consequence of this, for example, is
that in 'ubifs_remount_fs()' we use 'c->ro_media' to check whether
we are in R/O mode because on an error, and we print a message
in this case. However, if we are in R/O mode because the media
is R/O, our message is bogus.
This patch introduces new flag - 'c->ro_error' which is set when
we switch to R/O mode because of an error. It also changes all
"if (c->ro_media)" checks to "if (c->ro_error)" checks, because
this is what the checks actually mean. We do not need to check
for 'c->ro_media' because if the UBI volume is in R/O mode, we
do not allow R/W mounting, and now writes can happen. This is
guaranteed by VFS. But it is good to double-check this, so this
patch also adds many "ubifs_assert(!c->ro_media)" checks.
In the 'ubifs_remount_fs()' function this patch makes a bit more
changes - it fixes the error messages as well.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2010-09-17 07:44:28 -06:00
|
|
|
|
if (c->ro_error) {
|
|
|
|
|
ubifs_msg("cannot re-mount R/O due to prior errors");
|
2009-01-29 07:22:54 -07:00
|
|
|
|
return -EROFS;
|
2009-01-29 03:59:33 -07:00
|
|
|
|
}
|
2008-07-14 10:08:37 -06:00
|
|
|
|
ubifs_remount_ro(c);
|
2009-01-29 03:59:33 -07:00
|
|
|
|
}
|
2008-07-14 10:08:37 -06:00
|
|
|
|
|
2008-11-19 02:53:15 -07:00
|
|
|
|
if (c->bulk_read == 1)
|
|
|
|
|
bu_init(c);
|
|
|
|
|
else {
|
|
|
|
|
dbg_gen("disable bulk-read");
|
|
|
|
|
kfree(c->bu.buf);
|
|
|
|
|
c->bu.buf = NULL;
|
|
|
|
|
}
|
|
|
|
|
|
2009-03-15 09:20:22 -06:00
|
|
|
|
ubifs_assert(c->lst.taken_empty_lebs > 0);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
2009-01-15 08:43:23 -07:00
|
|
|
|
const struct super_operations ubifs_super_operations = {
|
2008-07-14 10:08:37 -06:00
|
|
|
|
.alloc_inode = ubifs_alloc_inode,
|
|
|
|
|
.destroy_inode = ubifs_destroy_inode,
|
|
|
|
|
.put_super = ubifs_put_super,
|
|
|
|
|
.write_inode = ubifs_write_inode,
|
2010-06-06 22:34:05 -06:00
|
|
|
|
.evict_inode = ubifs_evict_inode,
|
2008-07-14 10:08:37 -06:00
|
|
|
|
.statfs = ubifs_statfs,
|
|
|
|
|
.dirty_inode = ubifs_dirty_inode,
|
|
|
|
|
.remount_fs = ubifs_remount_fs,
|
|
|
|
|
.show_options = ubifs_show_options,
|
|
|
|
|
.sync_fs = ubifs_sync_fs,
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* open_ubi - parse UBI device name string and open the UBI device.
|
|
|
|
|
* @name: UBI volume name
|
|
|
|
|
* @mode: UBI volume open mode
|
|
|
|
|
*
|
2009-09-28 13:10:12 -06:00
|
|
|
|
* The primary method of mounting UBIFS is by specifying the UBI volume
|
|
|
|
|
* character device node path. However, UBIFS may also be mounted withoug any
|
|
|
|
|
* character device node using one of the following methods:
|
|
|
|
|
*
|
|
|
|
|
* o ubiX_Y - mount UBI device number X, volume Y;
|
|
|
|
|
* o ubiY - mount UBI device number 0, volume Y;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
* o ubiX:NAME - mount UBI device X, volume with name NAME;
|
|
|
|
|
* o ubi:NAME - mount UBI device 0, volume with name NAME.
|
|
|
|
|
*
|
|
|
|
|
* Alternative '!' separator may be used instead of ':' (because some shells
|
|
|
|
|
* like busybox may interpret ':' as an NFS host name separator). This function
|
2009-09-28 13:10:12 -06:00
|
|
|
|
* returns UBI volume description object in case of success and a negative
|
|
|
|
|
* error code in case of failure.
|
2008-07-14 10:08:37 -06:00
|
|
|
|
*/
|
|
|
|
|
static struct ubi_volume_desc *open_ubi(const char *name, int mode)
|
|
|
|
|
{
|
2009-09-28 13:10:12 -06:00
|
|
|
|
struct ubi_volume_desc *ubi;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
int dev, vol;
|
|
|
|
|
char *endptr;
|
|
|
|
|
|
2009-09-28 13:10:12 -06:00
|
|
|
|
/* First, try to open using the device node path method */
|
|
|
|
|
ubi = ubi_open_volume_path(name, mode);
|
|
|
|
|
if (!IS_ERR(ubi))
|
|
|
|
|
return ubi;
|
|
|
|
|
|
|
|
|
|
/* Try the "nodev" method */
|
2008-07-14 10:08:37 -06:00
|
|
|
|
if (name[0] != 'u' || name[1] != 'b' || name[2] != 'i')
|
|
|
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
|
|
|
|
|
|
/* ubi:NAME method */
|
|
|
|
|
if ((name[3] == ':' || name[3] == '!') && name[4] != '\0')
|
|
|
|
|
return ubi_open_volume_nm(0, name + 4, mode);
|
|
|
|
|
|
|
|
|
|
if (!isdigit(name[3]))
|
|
|
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
|
|
|
|
|
|
dev = simple_strtoul(name + 3, &endptr, 0);
|
|
|
|
|
|
|
|
|
|
/* ubiY method */
|
|
|
|
|
if (*endptr == '\0')
|
|
|
|
|
return ubi_open_volume(0, dev, mode);
|
|
|
|
|
|
|
|
|
|
/* ubiX_Y method */
|
|
|
|
|
if (*endptr == '_' && isdigit(endptr[1])) {
|
|
|
|
|
vol = simple_strtoul(endptr + 1, &endptr, 0);
|
|
|
|
|
if (*endptr != '\0')
|
|
|
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
|
return ubi_open_volume(dev, vol, mode);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* ubiX:NAME method */
|
|
|
|
|
if ((*endptr == ':' || *endptr == '!') && endptr[1] != '\0')
|
|
|
|
|
return ubi_open_volume_nm(dev, ++endptr, mode);
|
|
|
|
|
|
|
|
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
|
}
|
|
|
|
|
|
2011-06-12 08:07:03 -06:00
|
|
|
|
static struct ubifs_info *alloc_ubifs_info(struct ubi_volume_desc *ubi)
|
|
|
|
|
{
|
|
|
|
|
struct ubifs_info *c;
|
|
|
|
|
|
|
|
|
|
c = kzalloc(sizeof(struct ubifs_info), GFP_KERNEL);
|
|
|
|
|
if (c) {
|
|
|
|
|
spin_lock_init(&c->cnt_lock);
|
|
|
|
|
spin_lock_init(&c->cs_lock);
|
|
|
|
|
spin_lock_init(&c->buds_lock);
|
|
|
|
|
spin_lock_init(&c->space_lock);
|
|
|
|
|
spin_lock_init(&c->orphan_lock);
|
|
|
|
|
init_rwsem(&c->commit_sem);
|
|
|
|
|
mutex_init(&c->lp_mutex);
|
|
|
|
|
mutex_init(&c->tnc_mutex);
|
|
|
|
|
mutex_init(&c->log_mutex);
|
|
|
|
|
mutex_init(&c->umount_mutex);
|
|
|
|
|
mutex_init(&c->bu_mutex);
|
|
|
|
|
mutex_init(&c->write_reserve_mutex);
|
|
|
|
|
init_waitqueue_head(&c->cmt_wq);
|
|
|
|
|
c->buds = RB_ROOT;
|
|
|
|
|
c->old_idx = RB_ROOT;
|
|
|
|
|
c->size_tree = RB_ROOT;
|
|
|
|
|
c->orph_tree = RB_ROOT;
|
|
|
|
|
INIT_LIST_HEAD(&c->infos_list);
|
|
|
|
|
INIT_LIST_HEAD(&c->idx_gc);
|
|
|
|
|
INIT_LIST_HEAD(&c->replay_list);
|
|
|
|
|
INIT_LIST_HEAD(&c->replay_buds);
|
|
|
|
|
INIT_LIST_HEAD(&c->uncat_list);
|
|
|
|
|
INIT_LIST_HEAD(&c->empty_list);
|
|
|
|
|
INIT_LIST_HEAD(&c->freeable_list);
|
|
|
|
|
INIT_LIST_HEAD(&c->frdi_idx_list);
|
|
|
|
|
INIT_LIST_HEAD(&c->unclean_leb_list);
|
|
|
|
|
INIT_LIST_HEAD(&c->old_buds);
|
|
|
|
|
INIT_LIST_HEAD(&c->orph_list);
|
|
|
|
|
INIT_LIST_HEAD(&c->orph_new);
|
|
|
|
|
c->no_chk_data_crc = 1;
|
|
|
|
|
|
|
|
|
|
c->highest_inum = UBIFS_FIRST_INO;
|
|
|
|
|
c->lhead_lnum = c->ltail_lnum = UBIFS_LOG_LNUM;
|
|
|
|
|
|
|
|
|
|
ubi_get_volume_info(ubi, &c->vi);
|
|
|
|
|
ubi_get_device_info(c->vi.ubi_num, &c->di);
|
|
|
|
|
}
|
|
|
|
|
return c;
|
|
|
|
|
}
|
|
|
|
|
|
2008-07-14 10:08:37 -06:00
|
|
|
|
static int ubifs_fill_super(struct super_block *sb, void *data, int silent)
|
|
|
|
|
{
|
2011-06-12 08:24:33 -06:00
|
|
|
|
struct ubifs_info *c = sb->s_fs_info;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
struct inode *root;
|
|
|
|
|
int err;
|
|
|
|
|
|
2009-05-29 03:34:52 -06:00
|
|
|
|
c->vfs_sb = sb;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
/* Re-open the UBI device in read-write mode */
|
|
|
|
|
c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READWRITE);
|
|
|
|
|
if (IS_ERR(c->ubi)) {
|
|
|
|
|
err = PTR_ERR(c->ubi);
|
2011-06-12 08:24:33 -06:00
|
|
|
|
goto out;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
2008-08-13 05:13:26 -06:00
|
|
|
|
* UBIFS provides 'backing_dev_info' in order to disable read-ahead. For
|
2008-07-14 10:08:37 -06:00
|
|
|
|
* UBIFS, I/O is not deferred, it is done immediately in readpage,
|
|
|
|
|
* which means the user would have to wait not just for their own I/O
|
2008-08-13 05:13:26 -06:00
|
|
|
|
* but the read-ahead I/O as well i.e. completely pointless.
|
2008-07-14 10:08:37 -06:00
|
|
|
|
*
|
|
|
|
|
* Read-ahead will be disabled because @c->bdi.ra_pages is 0.
|
|
|
|
|
*/
|
2009-06-12 06:45:52 -06:00
|
|
|
|
c->bdi.name = "ubifs",
|
2008-07-14 10:08:37 -06:00
|
|
|
|
c->bdi.capabilities = BDI_CAP_MAP_COPY;
|
|
|
|
|
err = bdi_init(&c->bdi);
|
|
|
|
|
if (err)
|
|
|
|
|
goto out_close;
|
2009-07-02 09:15:47 -06:00
|
|
|
|
err = bdi_register(&c->bdi, NULL, "ubifs_%d_%d",
|
|
|
|
|
c->vi.ubi_num, c->vi.vol_id);
|
2009-05-29 01:19:23 -06:00
|
|
|
|
if (err)
|
|
|
|
|
goto out_bdi;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
|
|
|
|
|
err = ubifs_parse_options(c, data, 0);
|
|
|
|
|
if (err)
|
|
|
|
|
goto out_bdi;
|
|
|
|
|
|
2009-09-16 07:02:33 -06:00
|
|
|
|
sb->s_bdi = &c->bdi;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
sb->s_fs_info = c;
|
|
|
|
|
sb->s_magic = UBIFS_SUPER_MAGIC;
|
|
|
|
|
sb->s_blocksize = UBIFS_BLOCK_SIZE;
|
|
|
|
|
sb->s_blocksize_bits = UBIFS_BLOCK_SHIFT;
|
|
|
|
|
sb->s_maxbytes = c->max_inode_sz = key_max_inode_size(c);
|
|
|
|
|
if (c->max_inode_sz > MAX_LFS_FILESIZE)
|
|
|
|
|
sb->s_maxbytes = c->max_inode_sz = MAX_LFS_FILESIZE;
|
|
|
|
|
sb->s_op = &ubifs_super_operations;
|
|
|
|
|
|
|
|
|
|
mutex_lock(&c->umount_mutex);
|
|
|
|
|
err = mount_ubifs(c);
|
|
|
|
|
if (err) {
|
|
|
|
|
ubifs_assert(err < 0);
|
|
|
|
|
goto out_unlock;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Read the root inode */
|
|
|
|
|
root = ubifs_iget(sb, UBIFS_ROOT_INO);
|
|
|
|
|
if (IS_ERR(root)) {
|
|
|
|
|
err = PTR_ERR(root);
|
|
|
|
|
goto out_umount;
|
|
|
|
|
}
|
|
|
|
|
|
2012-01-08 20:15:13 -07:00
|
|
|
|
sb->s_root = d_make_root(root);
|
2013-06-06 20:17:22 -06:00
|
|
|
|
if (!sb->s_root) {
|
|
|
|
|
err = -ENOMEM;
|
2012-01-08 20:15:13 -07:00
|
|
|
|
goto out_umount;
|
2013-06-06 20:17:22 -06:00
|
|
|
|
}
|
2008-07-14 10:08:37 -06:00
|
|
|
|
|
|
|
|
|
mutex_unlock(&c->umount_mutex);
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
out_umount:
|
|
|
|
|
ubifs_umount(c);
|
|
|
|
|
out_unlock:
|
|
|
|
|
mutex_unlock(&c->umount_mutex);
|
|
|
|
|
out_bdi:
|
|
|
|
|
bdi_destroy(&c->bdi);
|
|
|
|
|
out_close:
|
|
|
|
|
ubi_close_volume(c->ubi);
|
2011-06-12 08:24:33 -06:00
|
|
|
|
out:
|
2008-07-14 10:08:37 -06:00
|
|
|
|
return err;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int sb_test(struct super_block *sb, void *data)
|
|
|
|
|
{
|
2011-06-12 08:24:33 -06:00
|
|
|
|
struct ubifs_info *c1 = data;
|
2009-05-25 10:23:04 -06:00
|
|
|
|
struct ubifs_info *c = sb->s_fs_info;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
|
2011-06-12 08:24:33 -06:00
|
|
|
|
return c->vi.cdev == c1->vi.cdev;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int sb_set(struct super_block *sb, void *data)
|
|
|
|
|
{
|
|
|
|
|
sb->s_fs_info = data;
|
|
|
|
|
return set_anon_super(sb, NULL);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
}
|
|
|
|
|
|
2010-07-25 13:52:42 -06:00
|
|
|
|
static struct dentry *ubifs_mount(struct file_system_type *fs_type, int flags,
|
|
|
|
|
const char *name, void *data)
|
2008-07-14 10:08:37 -06:00
|
|
|
|
{
|
|
|
|
|
struct ubi_volume_desc *ubi;
|
2011-06-12 08:24:33 -06:00
|
|
|
|
struct ubifs_info *c;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
struct super_block *sb;
|
|
|
|
|
int err;
|
|
|
|
|
|
|
|
|
|
dbg_gen("name %s, flags %#x", name, flags);
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Get UBI device number and volume ID. Mount it read-only so far
|
|
|
|
|
* because this might be a new mount point, and UBI allows only one
|
|
|
|
|
* read-write user at a time.
|
|
|
|
|
*/
|
|
|
|
|
ubi = open_ubi(name, UBI_READONLY);
|
|
|
|
|
if (IS_ERR(ubi)) {
|
2012-05-16 11:11:23 -06:00
|
|
|
|
ubifs_err("cannot open \"%s\", error %d",
|
|
|
|
|
name, (int)PTR_ERR(ubi));
|
2010-07-25 13:52:42 -06:00
|
|
|
|
return ERR_CAST(ubi);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
}
|
|
|
|
|
|
2011-06-12 08:24:33 -06:00
|
|
|
|
c = alloc_ubifs_info(ubi);
|
|
|
|
|
if (!c) {
|
|
|
|
|
err = -ENOMEM;
|
|
|
|
|
goto out_close;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
dbg_gen("opened ubi%d_%d", c->vi.ubi_num, c->vi.vol_id);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
|
2012-06-25 05:55:37 -06:00
|
|
|
|
sb = sget(fs_type, sb_test, sb_set, flags, c);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
if (IS_ERR(sb)) {
|
|
|
|
|
err = PTR_ERR(sb);
|
2011-06-12 08:24:33 -06:00
|
|
|
|
kfree(c);
|
2011-06-20 01:10:24 -06:00
|
|
|
|
goto out_close;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (sb->s_root) {
|
2010-09-19 09:34:26 -06:00
|
|
|
|
struct ubifs_info *c1 = sb->s_fs_info;
|
2011-06-12 08:24:33 -06:00
|
|
|
|
kfree(c);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
/* A new mount point for already mounted UBIFS */
|
|
|
|
|
dbg_gen("this ubi volume is already mounted");
|
2010-09-19 09:34:26 -06:00
|
|
|
|
if (!!(flags & MS_RDONLY) != c1->ro_mount) {
|
2008-07-14 10:08:37 -06:00
|
|
|
|
err = -EBUSY;
|
|
|
|
|
goto out_deact;
|
|
|
|
|
}
|
|
|
|
|
} else {
|
|
|
|
|
err = ubifs_fill_super(sb, data, flags & MS_SILENT ? 1 : 0);
|
|
|
|
|
if (err)
|
|
|
|
|
goto out_deact;
|
|
|
|
|
/* We do not support atime */
|
|
|
|
|
sb->s_flags |= MS_ACTIVE | MS_NOATIME;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* 'fill_super()' opens ubi again so we must close it here */
|
|
|
|
|
ubi_close_volume(ubi);
|
|
|
|
|
|
2010-07-25 13:52:42 -06:00
|
|
|
|
return dget(sb->s_root);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
|
|
|
|
|
out_deact:
|
2009-05-05 23:34:22 -06:00
|
|
|
|
deactivate_locked_super(sb);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
out_close:
|
|
|
|
|
ubi_close_volume(ubi);
|
2010-07-25 13:52:42 -06:00
|
|
|
|
return ERR_PTR(err);
|
2008-07-14 10:08:37 -06:00
|
|
|
|
}
|
|
|
|
|
|
2011-06-12 08:24:33 -06:00
|
|
|
|
static void kill_ubifs_super(struct super_block *s)
|
|
|
|
|
{
|
|
|
|
|
struct ubifs_info *c = s->s_fs_info;
|
|
|
|
|
kill_anon_super(s);
|
|
|
|
|
kfree(c);
|
|
|
|
|
}
|
|
|
|
|
|
2008-07-14 10:08:37 -06:00
|
|
|
|
static struct file_system_type ubifs_fs_type = {
|
|
|
|
|
.name = "ubifs",
|
|
|
|
|
.owner = THIS_MODULE,
|
2010-07-25 13:52:42 -06:00
|
|
|
|
.mount = ubifs_mount,
|
2011-06-12 08:24:33 -06:00
|
|
|
|
.kill_sb = kill_ubifs_super,
|
2008-07-14 10:08:37 -06:00
|
|
|
|
};
|
2013-03-02 20:39:14 -07:00
|
|
|
|
MODULE_ALIAS_FS("ubifs");
|
2008-07-14 10:08:37 -06:00
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Inode slab cache constructor.
|
|
|
|
|
*/
|
2008-07-25 20:45:34 -06:00
|
|
|
|
static void inode_slab_ctor(void *obj)
|
2008-07-14 10:08:37 -06:00
|
|
|
|
{
|
|
|
|
|
struct ubifs_inode *ui = obj;
|
|
|
|
|
inode_init_once(&ui->vfs_inode);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int __init ubifs_init(void)
|
|
|
|
|
{
|
|
|
|
|
int err;
|
|
|
|
|
|
|
|
|
|
BUILD_BUG_ON(sizeof(struct ubifs_ch) != 24);
|
|
|
|
|
|
|
|
|
|
/* Make sure node sizes are 8-byte aligned */
|
|
|
|
|
BUILD_BUG_ON(UBIFS_CH_SZ & 7);
|
|
|
|
|
BUILD_BUG_ON(UBIFS_INO_NODE_SZ & 7);
|
|
|
|
|
BUILD_BUG_ON(UBIFS_DENT_NODE_SZ & 7);
|
|
|
|
|
BUILD_BUG_ON(UBIFS_XENT_NODE_SZ & 7);
|
|
|
|
|
BUILD_BUG_ON(UBIFS_DATA_NODE_SZ & 7);
|
|
|
|
|
BUILD_BUG_ON(UBIFS_TRUN_NODE_SZ & 7);
|
|
|
|
|
BUILD_BUG_ON(UBIFS_SB_NODE_SZ & 7);
|
|
|
|
|
BUILD_BUG_ON(UBIFS_MST_NODE_SZ & 7);
|
|
|
|
|
BUILD_BUG_ON(UBIFS_REF_NODE_SZ & 7);
|
|
|
|
|
BUILD_BUG_ON(UBIFS_CS_NODE_SZ & 7);
|
|
|
|
|
BUILD_BUG_ON(UBIFS_ORPH_NODE_SZ & 7);
|
|
|
|
|
|
|
|
|
|
BUILD_BUG_ON(UBIFS_MAX_DENT_NODE_SZ & 7);
|
|
|
|
|
BUILD_BUG_ON(UBIFS_MAX_XENT_NODE_SZ & 7);
|
|
|
|
|
BUILD_BUG_ON(UBIFS_MAX_DATA_NODE_SZ & 7);
|
|
|
|
|
BUILD_BUG_ON(UBIFS_MAX_INO_NODE_SZ & 7);
|
|
|
|
|
BUILD_BUG_ON(UBIFS_MAX_NODE_SZ & 7);
|
|
|
|
|
BUILD_BUG_ON(MIN_WRITE_SZ & 7);
|
|
|
|
|
|
|
|
|
|
/* Check min. node size */
|
|
|
|
|
BUILD_BUG_ON(UBIFS_INO_NODE_SZ < MIN_WRITE_SZ);
|
|
|
|
|
BUILD_BUG_ON(UBIFS_DENT_NODE_SZ < MIN_WRITE_SZ);
|
|
|
|
|
BUILD_BUG_ON(UBIFS_XENT_NODE_SZ < MIN_WRITE_SZ);
|
|
|
|
|
BUILD_BUG_ON(UBIFS_TRUN_NODE_SZ < MIN_WRITE_SZ);
|
|
|
|
|
|
|
|
|
|
BUILD_BUG_ON(UBIFS_MAX_DENT_NODE_SZ > UBIFS_MAX_NODE_SZ);
|
|
|
|
|
BUILD_BUG_ON(UBIFS_MAX_XENT_NODE_SZ > UBIFS_MAX_NODE_SZ);
|
|
|
|
|
BUILD_BUG_ON(UBIFS_MAX_DATA_NODE_SZ > UBIFS_MAX_NODE_SZ);
|
|
|
|
|
BUILD_BUG_ON(UBIFS_MAX_INO_NODE_SZ > UBIFS_MAX_NODE_SZ);
|
|
|
|
|
|
|
|
|
|
/* Defined node sizes */
|
|
|
|
|
BUILD_BUG_ON(UBIFS_SB_NODE_SZ != 4096);
|
|
|
|
|
BUILD_BUG_ON(UBIFS_MST_NODE_SZ != 512);
|
|
|
|
|
BUILD_BUG_ON(UBIFS_INO_NODE_SZ != 160);
|
|
|
|
|
BUILD_BUG_ON(UBIFS_REF_NODE_SZ != 64);
|
|
|
|
|
|
2008-11-01 06:20:50 -06:00
|
|
|
|
/*
|
|
|
|
|
* We use 2 bit wide bit-fields to store compression type, which should
|
|
|
|
|
* be amended if more compressors are added. The bit-fields are:
|
2008-11-01 06:57:49 -06:00
|
|
|
|
* @compr_type in 'struct ubifs_inode', @default_compr in
|
|
|
|
|
* 'struct ubifs_info' and @compr_type in 'struct ubifs_mount_opts'.
|
2008-11-01 06:20:50 -06:00
|
|
|
|
*/
|
|
|
|
|
BUILD_BUG_ON(UBIFS_COMPR_TYPES_CNT > 4);
|
|
|
|
|
|
2008-07-14 10:08:37 -06:00
|
|
|
|
/*
|
|
|
|
|
* We require that PAGE_CACHE_SIZE is greater-than-or-equal-to
|
|
|
|
|
* UBIFS_BLOCK_SIZE. It is assumed that both are powers of 2.
|
|
|
|
|
*/
|
|
|
|
|
if (PAGE_CACHE_SIZE < UBIFS_BLOCK_SIZE) {
|
2012-08-27 04:34:09 -06:00
|
|
|
|
ubifs_err("VFS page cache size is %u bytes, but UBIFS requires at least 4096 bytes",
|
2008-07-14 10:08:37 -06:00
|
|
|
|
(unsigned int)PAGE_CACHE_SIZE);
|
|
|
|
|
return -EINVAL;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
ubifs_inode_slab = kmem_cache_create("ubifs_inode_slab",
|
|
|
|
|
sizeof(struct ubifs_inode), 0,
|
|
|
|
|
SLAB_MEM_SPREAD | SLAB_RECLAIM_ACCOUNT,
|
|
|
|
|
&inode_slab_ctor);
|
|
|
|
|
if (!ubifs_inode_slab)
|
2011-12-12 21:58:21 -07:00
|
|
|
|
return -ENOMEM;
|
2008-07-14 10:08:37 -06:00
|
|
|
|
|
|
|
|
|
register_shrinker(&ubifs_shrinker_info);
|
|
|
|
|
|
|
|
|
|
err = ubifs_compressors_init();
|
2008-10-23 02:49:28 -06:00
|
|
|
|
if (err)
|
|
|
|
|
goto out_shrinker;
|
|
|
|
|
|
|
|
|
|
err = dbg_debugfs_init();
|
2008-07-14 10:08:37 -06:00
|
|
|
|
if (err)
|
|
|
|
|
goto out_compr;
|
|
|
|
|
|
2011-12-12 21:58:21 -07:00
|
|
|
|
err = register_filesystem(&ubifs_fs_type);
|
|
|
|
|
if (err) {
|
|
|
|
|
ubifs_err("cannot register file system, error %d", err);
|
|
|
|
|
goto out_dbg;
|
|
|
|
|
}
|
2008-07-14 10:08:37 -06:00
|
|
|
|
return 0;
|
|
|
|
|
|
2011-12-12 21:58:21 -07:00
|
|
|
|
out_dbg:
|
|
|
|
|
dbg_debugfs_exit();
|
2008-07-14 10:08:37 -06:00
|
|
|
|
out_compr:
|
2008-10-23 02:49:28 -06:00
|
|
|
|
ubifs_compressors_exit();
|
|
|
|
|
out_shrinker:
|
2008-07-14 10:08:37 -06:00
|
|
|
|
unregister_shrinker(&ubifs_shrinker_info);
|
|
|
|
|
kmem_cache_destroy(ubifs_inode_slab);
|
|
|
|
|
return err;
|
|
|
|
|
}
|
|
|
|
|
/* late_initcall to let compressors initialize first */
|
|
|
|
|
late_initcall(ubifs_init);
|
|
|
|
|
|
|
|
|
|
static void __exit ubifs_exit(void)
|
|
|
|
|
{
|
|
|
|
|
ubifs_assert(list_empty(&ubifs_infos));
|
|
|
|
|
ubifs_assert(atomic_long_read(&ubifs_clean_zn_cnt) == 0);
|
|
|
|
|
|
2008-10-23 02:49:28 -06:00
|
|
|
|
dbg_debugfs_exit();
|
2008-07-14 10:08:37 -06:00
|
|
|
|
ubifs_compressors_exit();
|
|
|
|
|
unregister_shrinker(&ubifs_shrinker_info);
|
2012-09-25 19:33:07 -06:00
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Make sure all delayed rcu free inodes are flushed before we
|
|
|
|
|
* destroy cache.
|
|
|
|
|
*/
|
|
|
|
|
rcu_barrier();
|
2008-07-14 10:08:37 -06:00
|
|
|
|
kmem_cache_destroy(ubifs_inode_slab);
|
|
|
|
|
unregister_filesystem(&ubifs_fs_type);
|
|
|
|
|
}
|
|
|
|
|
module_exit(ubifs_exit);
|
|
|
|
|
|
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
|
MODULE_VERSION(__stringify(UBIFS_VERSION));
|
|
|
|
|
MODULE_AUTHOR("Artem Bityutskiy, Adrian Hunter");
|
|
|
|
|
MODULE_DESCRIPTION("UBIFS - UBI File System");
|