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![Wolfgang Wegner](/assets/img/avatar_default.png)
Prototype for gunzip/zunzip was only in lib_generic/gunzip.c and thus repeated in every file using it. This patch moves the prototypes to common.h and removes all prototypes distributed anywhere else. Signed-off-by: Wolfgang Wegner <w.wegner@astro-kom.de>
2144 lines
70 KiB
C
2144 lines
70 KiB
C
/*
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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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* (C) Copyright 2008-2009
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* Stefan Roese, DENX Software Engineering, sr@denx.de.
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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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#ifndef __UBIFS_H__
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#define __UBIFS_H__
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#if 0 /* Enable for debugging output */
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#define CONFIG_UBIFS_FS_DEBUG
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#define CONFIG_UBIFS_FS_DEBUG_MSG_LVL 3
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#endif
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#include <ubi_uboot.h>
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#include <linux/ctype.h>
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#include <linux/time.h>
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#include <linux/math64.h>
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#include "ubifs-media.h"
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struct dentry;
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struct file;
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struct iattr;
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struct kstat;
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struct vfsmount;
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extern struct super_block *ubifs_sb;
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extern unsigned int ubifs_msg_flags;
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extern unsigned int ubifs_chk_flags;
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extern unsigned int ubifs_tst_flags;
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#define pgoff_t unsigned long
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/*
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* We "simulate" the Linux page struct much simpler here
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*/
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struct page {
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pgoff_t index;
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void *addr;
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struct inode *inode;
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};
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void iput(struct inode *inode);
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/*
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* The atomic operations are used for budgeting etc which is not
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* needed for the read-only U-Boot implementation:
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*/
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#define atomic_long_inc(a)
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#define atomic_long_dec(a)
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#define atomic_long_sub(a, b)
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/* linux/include/time.h */
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struct timespec {
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time_t tv_sec; /* seconds */
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long tv_nsec; /* nanoseconds */
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};
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/* linux/include/dcache.h */
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/*
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* "quick string" -- eases parameter passing, but more importantly
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* saves "metadata" about the string (ie length and the hash).
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*
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* hash comes first so it snuggles against d_parent in the
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* dentry.
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*/
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struct qstr {
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unsigned int hash;
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unsigned int len;
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const char *name;
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};
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struct inode {
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struct hlist_node i_hash;
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struct list_head i_list;
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struct list_head i_sb_list;
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struct list_head i_dentry;
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unsigned long i_ino;
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unsigned int i_nlink;
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uid_t i_uid;
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gid_t i_gid;
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dev_t i_rdev;
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u64 i_version;
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loff_t i_size;
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#ifdef __NEED_I_SIZE_ORDERED
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seqcount_t i_size_seqcount;
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#endif
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struct timespec i_atime;
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struct timespec i_mtime;
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struct timespec i_ctime;
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unsigned int i_blkbits;
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unsigned short i_bytes;
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umode_t i_mode;
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spinlock_t i_lock; /* i_blocks, i_bytes, maybe i_size */
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struct mutex i_mutex;
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struct rw_semaphore i_alloc_sem;
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const struct inode_operations *i_op;
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const struct file_operations *i_fop; /* former ->i_op->default_file_ops */
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struct super_block *i_sb;
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struct file_lock *i_flock;
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#ifdef CONFIG_QUOTA
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struct dquot *i_dquot[MAXQUOTAS];
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#endif
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struct list_head i_devices;
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int i_cindex;
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__u32 i_generation;
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#ifdef CONFIG_DNOTIFY
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unsigned long i_dnotify_mask; /* Directory notify events */
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struct dnotify_struct *i_dnotify; /* for directory notifications */
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#endif
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#ifdef CONFIG_INOTIFY
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struct list_head inotify_watches; /* watches on this inode */
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struct mutex inotify_mutex; /* protects the watches list */
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#endif
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unsigned long i_state;
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unsigned long dirtied_when; /* jiffies of first dirtying */
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unsigned int i_flags;
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#ifdef CONFIG_SECURITY
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void *i_security;
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#endif
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void *i_private; /* fs or device private pointer */
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};
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struct super_block {
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struct list_head s_list; /* Keep this first */
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dev_t s_dev; /* search index; _not_ kdev_t */
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unsigned long s_blocksize;
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unsigned char s_blocksize_bits;
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unsigned char s_dirt;
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unsigned long long s_maxbytes; /* Max file size */
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struct file_system_type *s_type;
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const struct super_operations *s_op;
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struct dquot_operations *dq_op;
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struct quotactl_ops *s_qcop;
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const struct export_operations *s_export_op;
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unsigned long s_flags;
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unsigned long s_magic;
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struct dentry *s_root;
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struct rw_semaphore s_umount;
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struct mutex s_lock;
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int s_count;
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int s_syncing;
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int s_need_sync_fs;
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#ifdef CONFIG_SECURITY
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void *s_security;
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#endif
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struct xattr_handler **s_xattr;
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struct list_head s_inodes; /* all inodes */
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struct list_head s_dirty; /* dirty inodes */
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struct list_head s_io; /* parked for writeback */
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struct list_head s_more_io; /* parked for more writeback */
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struct hlist_head s_anon; /* anonymous dentries for (nfs) exporting */
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struct list_head s_files;
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/* s_dentry_lru and s_nr_dentry_unused are protected by dcache_lock */
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struct list_head s_dentry_lru; /* unused dentry lru */
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int s_nr_dentry_unused; /* # of dentry on lru */
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struct block_device *s_bdev;
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struct mtd_info *s_mtd;
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struct list_head s_instances;
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int s_frozen;
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wait_queue_head_t s_wait_unfrozen;
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char s_id[32]; /* Informational name */
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void *s_fs_info; /* Filesystem private info */
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/*
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* The next field is for VFS *only*. No filesystems have any business
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* even looking at it. You had been warned.
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*/
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struct mutex s_vfs_rename_mutex; /* Kludge */
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/* Granularity of c/m/atime in ns.
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Cannot be worse than a second */
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u32 s_time_gran;
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/*
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* Filesystem subtype. If non-empty the filesystem type field
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* in /proc/mounts will be "type.subtype"
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*/
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char *s_subtype;
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/*
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* Saved mount options for lazy filesystems using
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* generic_show_options()
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*/
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char *s_options;
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};
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struct file_system_type {
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const char *name;
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int fs_flags;
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int (*get_sb) (struct file_system_type *, int,
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const char *, void *, struct vfsmount *);
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void (*kill_sb) (struct super_block *);
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struct module *owner;
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struct file_system_type * next;
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struct list_head fs_supers;
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};
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struct vfsmount {
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struct list_head mnt_hash;
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struct vfsmount *mnt_parent; /* fs we are mounted on */
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struct dentry *mnt_mountpoint; /* dentry of mountpoint */
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struct dentry *mnt_root; /* root of the mounted tree */
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struct super_block *mnt_sb; /* pointer to superblock */
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struct list_head mnt_mounts; /* list of children, anchored here */
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struct list_head mnt_child; /* and going through their mnt_child */
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int mnt_flags;
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/* 4 bytes hole on 64bits arches */
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const char *mnt_devname; /* Name of device e.g. /dev/dsk/hda1 */
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struct list_head mnt_list;
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struct list_head mnt_expire; /* link in fs-specific expiry list */
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struct list_head mnt_share; /* circular list of shared mounts */
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struct list_head mnt_slave_list;/* list of slave mounts */
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struct list_head mnt_slave; /* slave list entry */
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struct vfsmount *mnt_master; /* slave is on master->mnt_slave_list */
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struct mnt_namespace *mnt_ns; /* containing namespace */
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int mnt_id; /* mount identifier */
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int mnt_group_id; /* peer group identifier */
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/*
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* We put mnt_count & mnt_expiry_mark at the end of struct vfsmount
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* to let these frequently modified fields in a separate cache line
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* (so that reads of mnt_flags wont ping-pong on SMP machines)
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*/
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int mnt_expiry_mark; /* true if marked for expiry */
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int mnt_pinned;
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int mnt_ghosts;
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/*
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* This value is not stable unless all of the mnt_writers[] spinlocks
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* are held, and all mnt_writer[]s on this mount have 0 as their ->count
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*/
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};
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struct path {
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struct vfsmount *mnt;
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struct dentry *dentry;
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};
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struct file {
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struct path f_path;
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#define f_dentry f_path.dentry
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#define f_vfsmnt f_path.mnt
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const struct file_operations *f_op;
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unsigned int f_flags;
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loff_t f_pos;
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unsigned int f_uid, f_gid;
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u64 f_version;
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#ifdef CONFIG_SECURITY
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void *f_security;
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#endif
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/* needed for tty driver, and maybe others */
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void *private_data;
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#ifdef CONFIG_EPOLL
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/* Used by fs/eventpoll.c to link all the hooks to this file */
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struct list_head f_ep_links;
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spinlock_t f_ep_lock;
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#endif /* #ifdef CONFIG_EPOLL */
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#ifdef CONFIG_DEBUG_WRITECOUNT
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unsigned long f_mnt_write_state;
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#endif
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};
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/*
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* get_seconds() not really needed in the read-only implmentation
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*/
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#define get_seconds() 0
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/* 4k page size */
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#define PAGE_CACHE_SHIFT 12
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#define PAGE_CACHE_SIZE (1 << PAGE_CACHE_SHIFT)
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/* Page cache limit. The filesystems should put that into their s_maxbytes
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limits, otherwise bad things can happen in VM. */
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#if BITS_PER_LONG==32
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#define MAX_LFS_FILESIZE (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
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#elif BITS_PER_LONG==64
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#define MAX_LFS_FILESIZE 0x7fffffffffffffffUL
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#endif
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#define INT_MAX ((int)(~0U>>1))
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#define INT_MIN (-INT_MAX - 1)
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#define LLONG_MAX ((long long)(~0ULL>>1))
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/*
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* These are the fs-independent mount-flags: up to 32 flags are supported
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*/
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#define MS_RDONLY 1 /* Mount read-only */
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#define MS_NOSUID 2 /* Ignore suid and sgid bits */
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#define MS_NODEV 4 /* Disallow access to device special files */
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#define MS_NOEXEC 8 /* Disallow program execution */
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#define MS_SYNCHRONOUS 16 /* Writes are synced at once */
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#define MS_REMOUNT 32 /* Alter flags of a mounted FS */
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#define MS_MANDLOCK 64 /* Allow mandatory locks on an FS */
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#define MS_DIRSYNC 128 /* Directory modifications are synchronous */
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#define MS_NOATIME 1024 /* Do not update access times. */
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#define MS_NODIRATIME 2048 /* Do not update directory access times */
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#define MS_BIND 4096
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#define MS_MOVE 8192
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#define MS_REC 16384
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#define MS_VERBOSE 32768 /* War is peace. Verbosity is silence.
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MS_VERBOSE is deprecated. */
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#define MS_SILENT 32768
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#define MS_POSIXACL (1<<16) /* VFS does not apply the umask */
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#define MS_UNBINDABLE (1<<17) /* change to unbindable */
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#define MS_PRIVATE (1<<18) /* change to private */
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#define MS_SLAVE (1<<19) /* change to slave */
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#define MS_SHARED (1<<20) /* change to shared */
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#define MS_RELATIME (1<<21) /* Update atime relative to mtime/ctime. */
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#define MS_KERNMOUNT (1<<22) /* this is a kern_mount call */
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#define MS_I_VERSION (1<<23) /* Update inode I_version field */
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#define MS_ACTIVE (1<<30)
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#define MS_NOUSER (1<<31)
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#define I_NEW 8
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/* Inode flags - they have nothing to superblock flags now */
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#define S_SYNC 1 /* Writes are synced at once */
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#define S_NOATIME 2 /* Do not update access times */
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#define S_APPEND 4 /* Append-only file */
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#define S_IMMUTABLE 8 /* Immutable file */
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#define S_DEAD 16 /* removed, but still open directory */
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#define S_NOQUOTA 32 /* Inode is not counted to quota */
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#define S_DIRSYNC 64 /* Directory modifications are synchronous */
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#define S_NOCMTIME 128 /* Do not update file c/mtime */
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#define S_SWAPFILE 256 /* Do not truncate: swapon got its bmaps */
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#define S_PRIVATE 512 /* Inode is fs-internal */
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/* include/linux/stat.h */
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#define S_IFMT 00170000
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#define S_IFSOCK 0140000
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#define S_IFLNK 0120000
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#define S_IFREG 0100000
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#define S_IFBLK 0060000
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#define S_IFDIR 0040000
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#define S_IFCHR 0020000
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#define S_IFIFO 0010000
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#define S_ISUID 0004000
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#define S_ISGID 0002000
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#define S_ISVTX 0001000
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/* include/linux/fs.h */
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/*
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* File types
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*
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* NOTE! These match bits 12..15 of stat.st_mode
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* (ie "(i_mode >> 12) & 15").
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*/
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#define DT_UNKNOWN 0
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#define DT_FIFO 1
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#define DT_CHR 2
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#define DT_DIR 4
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#define DT_BLK 6
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#define DT_REG 8
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#define DT_LNK 10
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#define DT_SOCK 12
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#define DT_WHT 14
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#define I_DIRTY_SYNC 1
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#define I_DIRTY_DATASYNC 2
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#define I_DIRTY_PAGES 4
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#define I_NEW 8
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#define I_WILL_FREE 16
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#define I_FREEING 32
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#define I_CLEAR 64
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#define __I_LOCK 7
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#define I_LOCK (1 << __I_LOCK)
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#define __I_SYNC 8
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#define I_SYNC (1 << __I_SYNC)
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#define I_DIRTY (I_DIRTY_SYNC | I_DIRTY_DATASYNC | I_DIRTY_PAGES)
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/* linux/include/dcache.h */
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#define DNAME_INLINE_LEN_MIN 36
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struct dentry {
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unsigned int d_flags; /* protected by d_lock */
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spinlock_t d_lock; /* per dentry lock */
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struct inode *d_inode; /* Where the name belongs to - NULL is
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* negative */
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/*
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* The next three fields are touched by __d_lookup. Place them here
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* so they all fit in a cache line.
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*/
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struct hlist_node d_hash; /* lookup hash list */
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struct dentry *d_parent; /* parent directory */
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struct qstr d_name;
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struct list_head d_lru; /* LRU list */
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/*
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* d_child and d_rcu can share memory
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*/
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struct list_head d_subdirs; /* our children */
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struct list_head d_alias; /* inode alias list */
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unsigned long d_time; /* used by d_revalidate */
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struct super_block *d_sb; /* The root of the dentry tree */
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void *d_fsdata; /* fs-specific data */
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#ifdef CONFIG_PROFILING
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struct dcookie_struct *d_cookie; /* cookie, if any */
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#endif
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int d_mounted;
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unsigned char d_iname[DNAME_INLINE_LEN_MIN]; /* small names */
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};
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static inline ino_t parent_ino(struct dentry *dentry)
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{
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ino_t res;
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spin_lock(&dentry->d_lock);
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res = dentry->d_parent->d_inode->i_ino;
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spin_unlock(&dentry->d_lock);
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return res;
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}
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|
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/* debug.c */
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#define DEFINE_SPINLOCK(...)
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#define module_param_named(...)
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/* misc.h */
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#define mutex_lock_nested(...)
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#define mutex_unlock_nested(...)
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#define mutex_is_locked(...) 0
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|
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/* Version of this UBIFS implementation */
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|
#define UBIFS_VERSION 1
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|
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/* Normal UBIFS messages */
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|
#define ubifs_msg(fmt, ...) \
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printk(KERN_NOTICE "UBIFS: " fmt "\n", ##__VA_ARGS__)
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/* UBIFS error messages */
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#define ubifs_err(fmt, ...) \
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printk(KERN_ERR "UBIFS error (pid %d): %s: " fmt "\n", 0, \
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__func__, ##__VA_ARGS__)
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/* UBIFS warning messages */
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#define ubifs_warn(fmt, ...) \
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printk(KERN_WARNING "UBIFS warning (pid %d): %s: " fmt "\n", \
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0, __func__, ##__VA_ARGS__)
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/* UBIFS file system VFS magic number */
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#define UBIFS_SUPER_MAGIC 0x24051905
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/* Number of UBIFS blocks per VFS page */
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#define UBIFS_BLOCKS_PER_PAGE (PAGE_CACHE_SIZE / UBIFS_BLOCK_SIZE)
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#define UBIFS_BLOCKS_PER_PAGE_SHIFT (PAGE_CACHE_SHIFT - UBIFS_BLOCK_SHIFT)
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|
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/* "File system end of life" sequence number watermark */
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#define SQNUM_WARN_WATERMARK 0xFFFFFFFF00000000ULL
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#define SQNUM_WATERMARK 0xFFFFFFFFFF000000ULL
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|
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/*
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* Minimum amount of LEBs reserved for the index. At present the index needs at
|
|
* least 2 LEBs: one for the index head and one for in-the-gaps method (which
|
|
* currently does not cater for the index head and so excludes it from
|
|
* consideration).
|
|
*/
|
|
#define MIN_INDEX_LEBS 2
|
|
|
|
/* Minimum amount of data UBIFS writes to the flash */
|
|
#define MIN_WRITE_SZ (UBIFS_DATA_NODE_SZ + 8)
|
|
|
|
/*
|
|
* Currently we do not support inode number overlapping and re-using, so this
|
|
* watermark defines dangerous inode number level. This should be fixed later,
|
|
* although it is difficult to exceed current limit. Another option is to use
|
|
* 64-bit inode numbers, but this means more overhead.
|
|
*/
|
|
#define INUM_WARN_WATERMARK 0xFFF00000
|
|
#define INUM_WATERMARK 0xFFFFFF00
|
|
|
|
/* Largest key size supported in this implementation */
|
|
#define CUR_MAX_KEY_LEN UBIFS_SK_LEN
|
|
|
|
/* Maximum number of entries in each LPT (LEB category) heap */
|
|
#define LPT_HEAP_SZ 256
|
|
|
|
/*
|
|
* Background thread name pattern. The numbers are UBI device and volume
|
|
* numbers.
|
|
*/
|
|
#define BGT_NAME_PATTERN "ubifs_bgt%d_%d"
|
|
|
|
/* Default write-buffer synchronization timeout (5 secs) */
|
|
#define DEFAULT_WBUF_TIMEOUT (5 * HZ)
|
|
|
|
/* Maximum possible inode number (only 32-bit inodes are supported now) */
|
|
#define MAX_INUM 0xFFFFFFFF
|
|
|
|
/* Number of non-data journal heads */
|
|
#define NONDATA_JHEADS_CNT 2
|
|
|
|
/* Garbage collector head */
|
|
#define GCHD 0
|
|
/* Base journal head number */
|
|
#define BASEHD 1
|
|
/* First "general purpose" journal head */
|
|
#define DATAHD 2
|
|
|
|
/* 'No change' value for 'ubifs_change_lp()' */
|
|
#define LPROPS_NC 0x80000001
|
|
|
|
/*
|
|
* There is no notion of truncation key because truncation nodes do not exist
|
|
* in TNC. However, when replaying, it is handy to introduce fake "truncation"
|
|
* keys for truncation nodes because the code becomes simpler. So we define
|
|
* %UBIFS_TRUN_KEY type.
|
|
*/
|
|
#define UBIFS_TRUN_KEY UBIFS_KEY_TYPES_CNT
|
|
|
|
/*
|
|
* How much a directory entry/extended attribute entry adds to the parent/host
|
|
* inode.
|
|
*/
|
|
#define CALC_DENT_SIZE(name_len) ALIGN(UBIFS_DENT_NODE_SZ + (name_len) + 1, 8)
|
|
|
|
/* How much an extended attribute adds to the host inode */
|
|
#define CALC_XATTR_BYTES(data_len) ALIGN(UBIFS_INO_NODE_SZ + (data_len) + 1, 8)
|
|
|
|
/*
|
|
* Znodes which were not touched for 'OLD_ZNODE_AGE' seconds are considered
|
|
* "old", and znode which were touched last 'YOUNG_ZNODE_AGE' seconds ago are
|
|
* considered "young". This is used by shrinker when selecting znode to trim
|
|
* off.
|
|
*/
|
|
#define OLD_ZNODE_AGE 20
|
|
#define YOUNG_ZNODE_AGE 5
|
|
|
|
/*
|
|
* Some compressors, like LZO, may end up with more data then the input buffer.
|
|
* So UBIFS always allocates larger output buffer, to be sure the compressor
|
|
* will not corrupt memory in case of worst case compression.
|
|
*/
|
|
#define WORST_COMPR_FACTOR 2
|
|
|
|
/* Maximum expected tree height for use by bottom_up_buf */
|
|
#define BOTTOM_UP_HEIGHT 64
|
|
|
|
/* Maximum number of data nodes to bulk-read */
|
|
#define UBIFS_MAX_BULK_READ 32
|
|
|
|
/*
|
|
* Lockdep classes for UBIFS inode @ui_mutex.
|
|
*/
|
|
enum {
|
|
WB_MUTEX_1 = 0,
|
|
WB_MUTEX_2 = 1,
|
|
WB_MUTEX_3 = 2,
|
|
};
|
|
|
|
/*
|
|
* Znode flags (actually, bit numbers which store the flags).
|
|
*
|
|
* DIRTY_ZNODE: znode is dirty
|
|
* COW_ZNODE: znode is being committed and a new instance of this znode has to
|
|
* be created before changing this znode
|
|
* OBSOLETE_ZNODE: znode is obsolete, which means it was deleted, but it is
|
|
* still in the commit list and the ongoing commit operation
|
|
* will commit it, and delete this znode after it is done
|
|
*/
|
|
enum {
|
|
DIRTY_ZNODE = 0,
|
|
COW_ZNODE = 1,
|
|
OBSOLETE_ZNODE = 2,
|
|
};
|
|
|
|
/*
|
|
* Commit states.
|
|
*
|
|
* COMMIT_RESTING: commit is not wanted
|
|
* COMMIT_BACKGROUND: background commit has been requested
|
|
* COMMIT_REQUIRED: commit is required
|
|
* COMMIT_RUNNING_BACKGROUND: background commit is running
|
|
* COMMIT_RUNNING_REQUIRED: commit is running and it is required
|
|
* COMMIT_BROKEN: commit failed
|
|
*/
|
|
enum {
|
|
COMMIT_RESTING = 0,
|
|
COMMIT_BACKGROUND,
|
|
COMMIT_REQUIRED,
|
|
COMMIT_RUNNING_BACKGROUND,
|
|
COMMIT_RUNNING_REQUIRED,
|
|
COMMIT_BROKEN,
|
|
};
|
|
|
|
/*
|
|
* 'ubifs_scan_a_node()' return values.
|
|
*
|
|
* SCANNED_GARBAGE: scanned garbage
|
|
* SCANNED_EMPTY_SPACE: scanned empty space
|
|
* SCANNED_A_NODE: scanned a valid node
|
|
* SCANNED_A_CORRUPT_NODE: scanned a corrupted node
|
|
* SCANNED_A_BAD_PAD_NODE: scanned a padding node with invalid pad length
|
|
*
|
|
* Greater than zero means: 'scanned that number of padding bytes'
|
|
*/
|
|
enum {
|
|
SCANNED_GARBAGE = 0,
|
|
SCANNED_EMPTY_SPACE = -1,
|
|
SCANNED_A_NODE = -2,
|
|
SCANNED_A_CORRUPT_NODE = -3,
|
|
SCANNED_A_BAD_PAD_NODE = -4,
|
|
};
|
|
|
|
/*
|
|
* LPT cnode flag bits.
|
|
*
|
|
* DIRTY_CNODE: cnode is dirty
|
|
* COW_CNODE: cnode is being committed and must be copied before writing
|
|
* OBSOLETE_CNODE: cnode is being committed and has been copied (or deleted),
|
|
* so it can (and must) be freed when the commit is finished
|
|
*/
|
|
enum {
|
|
DIRTY_CNODE = 0,
|
|
COW_CNODE = 1,
|
|
OBSOLETE_CNODE = 2,
|
|
};
|
|
|
|
/*
|
|
* Dirty flag bits (lpt_drty_flgs) for LPT special nodes.
|
|
*
|
|
* LTAB_DIRTY: ltab node is dirty
|
|
* LSAVE_DIRTY: lsave node is dirty
|
|
*/
|
|
enum {
|
|
LTAB_DIRTY = 1,
|
|
LSAVE_DIRTY = 2,
|
|
};
|
|
|
|
/*
|
|
* Return codes used by the garbage collector.
|
|
* @LEB_FREED: the logical eraseblock was freed and is ready to use
|
|
* @LEB_FREED_IDX: indexing LEB was freed and can be used only after the commit
|
|
* @LEB_RETAINED: the logical eraseblock was freed and retained for GC purposes
|
|
*/
|
|
enum {
|
|
LEB_FREED,
|
|
LEB_FREED_IDX,
|
|
LEB_RETAINED,
|
|
};
|
|
|
|
/**
|
|
* struct ubifs_old_idx - index node obsoleted since last commit start.
|
|
* @rb: rb-tree node
|
|
* @lnum: LEB number of obsoleted index node
|
|
* @offs: offset of obsoleted index node
|
|
*/
|
|
struct ubifs_old_idx {
|
|
struct rb_node rb;
|
|
int lnum;
|
|
int offs;
|
|
};
|
|
|
|
/* The below union makes it easier to deal with keys */
|
|
union ubifs_key {
|
|
uint8_t u8[CUR_MAX_KEY_LEN];
|
|
uint32_t u32[CUR_MAX_KEY_LEN/4];
|
|
uint64_t u64[CUR_MAX_KEY_LEN/8];
|
|
__le32 j32[CUR_MAX_KEY_LEN/4];
|
|
};
|
|
|
|
/**
|
|
* struct ubifs_scan_node - UBIFS scanned node information.
|
|
* @list: list of scanned nodes
|
|
* @key: key of node scanned (if it has one)
|
|
* @sqnum: sequence number
|
|
* @type: type of node scanned
|
|
* @offs: offset with LEB of node scanned
|
|
* @len: length of node scanned
|
|
* @node: raw node
|
|
*/
|
|
struct ubifs_scan_node {
|
|
struct list_head list;
|
|
union ubifs_key key;
|
|
unsigned long long sqnum;
|
|
int type;
|
|
int offs;
|
|
int len;
|
|
void *node;
|
|
};
|
|
|
|
/**
|
|
* struct ubifs_scan_leb - UBIFS scanned LEB information.
|
|
* @lnum: logical eraseblock number
|
|
* @nodes_cnt: number of nodes scanned
|
|
* @nodes: list of struct ubifs_scan_node
|
|
* @endpt: end point (and therefore the start of empty space)
|
|
* @ecc: read returned -EBADMSG
|
|
* @buf: buffer containing entire LEB scanned
|
|
*/
|
|
struct ubifs_scan_leb {
|
|
int lnum;
|
|
int nodes_cnt;
|
|
struct list_head nodes;
|
|
int endpt;
|
|
int ecc;
|
|
void *buf;
|
|
};
|
|
|
|
/**
|
|
* struct ubifs_gced_idx_leb - garbage-collected indexing LEB.
|
|
* @list: list
|
|
* @lnum: LEB number
|
|
* @unmap: OK to unmap this LEB
|
|
*
|
|
* This data structure is used to temporary store garbage-collected indexing
|
|
* LEBs - they are not released immediately, but only after the next commit.
|
|
* This is needed to guarantee recoverability.
|
|
*/
|
|
struct ubifs_gced_idx_leb {
|
|
struct list_head list;
|
|
int lnum;
|
|
int unmap;
|
|
};
|
|
|
|
/**
|
|
* struct ubifs_inode - UBIFS in-memory inode description.
|
|
* @vfs_inode: VFS inode description object
|
|
* @creat_sqnum: sequence number at time of creation
|
|
* @del_cmtno: commit number corresponding to the time the inode was deleted,
|
|
* protected by @c->commit_sem;
|
|
* @xattr_size: summarized size of all extended attributes in bytes
|
|
* @xattr_cnt: count of extended attributes this inode has
|
|
* @xattr_names: sum of lengths of all extended attribute names belonging to
|
|
* this inode
|
|
* @dirty: non-zero if the inode is dirty
|
|
* @xattr: non-zero if this is an extended attribute inode
|
|
* @bulk_read: non-zero if bulk-read should be used
|
|
* @ui_mutex: serializes inode write-back with the rest of VFS operations,
|
|
* serializes "clean <-> dirty" state changes, serializes bulk-read,
|
|
* protects @dirty, @bulk_read, @ui_size, and @xattr_size
|
|
* @ui_lock: protects @synced_i_size
|
|
* @synced_i_size: synchronized size of inode, i.e. the value of inode size
|
|
* currently stored on the flash; used only for regular file
|
|
* inodes
|
|
* @ui_size: inode size used by UBIFS when writing to flash
|
|
* @flags: inode flags (@UBIFS_COMPR_FL, etc)
|
|
* @compr_type: default compression type used for this inode
|
|
* @last_page_read: page number of last page read (for bulk read)
|
|
* @read_in_a_row: number of consecutive pages read in a row (for bulk read)
|
|
* @data_len: length of the data attached to the inode
|
|
* @data: inode's data
|
|
*
|
|
* @ui_mutex exists for two main reasons. At first it prevents inodes from
|
|
* being written back while UBIFS changing them, being in the middle of an VFS
|
|
* operation. This way UBIFS makes sure the inode fields are consistent. For
|
|
* example, in 'ubifs_rename()' we change 3 inodes simultaneously, and
|
|
* write-back must not write any of them before we have finished.
|
|
*
|
|
* The second reason is budgeting - UBIFS has to budget all operations. If an
|
|
* operation is going to mark an inode dirty, it has to allocate budget for
|
|
* this. It cannot just mark it dirty because there is no guarantee there will
|
|
* be enough flash space to write the inode back later. This means UBIFS has
|
|
* to have full control over inode "clean <-> dirty" transitions (and pages
|
|
* actually). But unfortunately, VFS marks inodes dirty in many places, and it
|
|
* does not ask the file-system if it is allowed to do so (there is a notifier,
|
|
* but it is not enough), i.e., there is no mechanism to synchronize with this.
|
|
* So UBIFS has its own inode dirty flag and its own mutex to serialize
|
|
* "clean <-> dirty" transitions.
|
|
*
|
|
* The @synced_i_size field is used to make sure we never write pages which are
|
|
* beyond last synchronized inode size. See 'ubifs_writepage()' for more
|
|
* information.
|
|
*
|
|
* The @ui_size is a "shadow" variable for @inode->i_size and UBIFS uses
|
|
* @ui_size instead of @inode->i_size. The reason for this is that UBIFS cannot
|
|
* make sure @inode->i_size is always changed under @ui_mutex, because it
|
|
* cannot call 'vmtruncate()' with @ui_mutex locked, because it would deadlock
|
|
* with 'ubifs_writepage()' (see file.c). All the other inode fields are
|
|
* changed under @ui_mutex, so they do not need "shadow" fields. Note, one
|
|
* could consider to rework locking and base it on "shadow" fields.
|
|
*/
|
|
struct ubifs_inode {
|
|
struct inode vfs_inode;
|
|
unsigned long long creat_sqnum;
|
|
unsigned long long del_cmtno;
|
|
unsigned int xattr_size;
|
|
unsigned int xattr_cnt;
|
|
unsigned int xattr_names;
|
|
unsigned int dirty:1;
|
|
unsigned int xattr:1;
|
|
unsigned int bulk_read:1;
|
|
unsigned int compr_type:2;
|
|
struct mutex ui_mutex;
|
|
spinlock_t ui_lock;
|
|
loff_t synced_i_size;
|
|
loff_t ui_size;
|
|
int flags;
|
|
pgoff_t last_page_read;
|
|
pgoff_t read_in_a_row;
|
|
int data_len;
|
|
void *data;
|
|
};
|
|
|
|
/**
|
|
* struct ubifs_unclean_leb - records a LEB recovered under read-only mode.
|
|
* @list: list
|
|
* @lnum: LEB number of recovered LEB
|
|
* @endpt: offset where recovery ended
|
|
*
|
|
* This structure records a LEB identified during recovery that needs to be
|
|
* cleaned but was not because UBIFS was mounted read-only. The information
|
|
* is used to clean the LEB when remounting to read-write mode.
|
|
*/
|
|
struct ubifs_unclean_leb {
|
|
struct list_head list;
|
|
int lnum;
|
|
int endpt;
|
|
};
|
|
|
|
/*
|
|
* LEB properties flags.
|
|
*
|
|
* LPROPS_UNCAT: not categorized
|
|
* LPROPS_DIRTY: dirty > free, dirty >= @c->dead_wm, not index
|
|
* LPROPS_DIRTY_IDX: dirty + free > @c->min_idx_node_sze and index
|
|
* LPROPS_FREE: free > 0, dirty < @c->dead_wm, not empty, not index
|
|
* LPROPS_HEAP_CNT: number of heaps used for storing categorized LEBs
|
|
* LPROPS_EMPTY: LEB is empty, not taken
|
|
* LPROPS_FREEABLE: free + dirty == leb_size, not index, not taken
|
|
* LPROPS_FRDI_IDX: free + dirty == leb_size and index, may be taken
|
|
* LPROPS_CAT_MASK: mask for the LEB categories above
|
|
* LPROPS_TAKEN: LEB was taken (this flag is not saved on the media)
|
|
* LPROPS_INDEX: LEB contains indexing nodes (this flag also exists on flash)
|
|
*/
|
|
enum {
|
|
LPROPS_UNCAT = 0,
|
|
LPROPS_DIRTY = 1,
|
|
LPROPS_DIRTY_IDX = 2,
|
|
LPROPS_FREE = 3,
|
|
LPROPS_HEAP_CNT = 3,
|
|
LPROPS_EMPTY = 4,
|
|
LPROPS_FREEABLE = 5,
|
|
LPROPS_FRDI_IDX = 6,
|
|
LPROPS_CAT_MASK = 15,
|
|
LPROPS_TAKEN = 16,
|
|
LPROPS_INDEX = 32,
|
|
};
|
|
|
|
/**
|
|
* struct ubifs_lprops - logical eraseblock properties.
|
|
* @free: amount of free space in bytes
|
|
* @dirty: amount of dirty space in bytes
|
|
* @flags: LEB properties flags (see above)
|
|
* @lnum: LEB number
|
|
* @list: list of same-category lprops (for LPROPS_EMPTY and LPROPS_FREEABLE)
|
|
* @hpos: heap position in heap of same-category lprops (other categories)
|
|
*/
|
|
struct ubifs_lprops {
|
|
int free;
|
|
int dirty;
|
|
int flags;
|
|
int lnum;
|
|
union {
|
|
struct list_head list;
|
|
int hpos;
|
|
};
|
|
};
|
|
|
|
/**
|
|
* struct ubifs_lpt_lprops - LPT logical eraseblock properties.
|
|
* @free: amount of free space in bytes
|
|
* @dirty: amount of dirty space in bytes
|
|
* @tgc: trivial GC flag (1 => unmap after commit end)
|
|
* @cmt: commit flag (1 => reserved for commit)
|
|
*/
|
|
struct ubifs_lpt_lprops {
|
|
int free;
|
|
int dirty;
|
|
unsigned tgc:1;
|
|
unsigned cmt:1;
|
|
};
|
|
|
|
/**
|
|
* struct ubifs_lp_stats - statistics of eraseblocks in the main area.
|
|
* @empty_lebs: number of empty LEBs
|
|
* @taken_empty_lebs: number of taken LEBs
|
|
* @idx_lebs: number of indexing LEBs
|
|
* @total_free: total free space in bytes (includes all LEBs)
|
|
* @total_dirty: total dirty space in bytes (includes all LEBs)
|
|
* @total_used: total used space in bytes (does not include index LEBs)
|
|
* @total_dead: total dead space in bytes (does not include index LEBs)
|
|
* @total_dark: total dark space in bytes (does not include index LEBs)
|
|
*
|
|
* The @taken_empty_lebs field counts the LEBs that are in the transient state
|
|
* of having been "taken" for use but not yet written to. @taken_empty_lebs is
|
|
* needed to account correctly for @gc_lnum, otherwise @empty_lebs could be
|
|
* used by itself (in which case 'unused_lebs' would be a better name). In the
|
|
* case of @gc_lnum, it is "taken" at mount time or whenever a LEB is retained
|
|
* by GC, but unlike other empty LEBs that are "taken", it may not be written
|
|
* straight away (i.e. before the next commit start or unmount), so either
|
|
* @gc_lnum must be specially accounted for, or the current approach followed
|
|
* i.e. count it under @taken_empty_lebs.
|
|
*
|
|
* @empty_lebs includes @taken_empty_lebs.
|
|
*
|
|
* @total_used, @total_dead and @total_dark fields do not account indexing
|
|
* LEBs.
|
|
*/
|
|
struct ubifs_lp_stats {
|
|
int empty_lebs;
|
|
int taken_empty_lebs;
|
|
int idx_lebs;
|
|
long long total_free;
|
|
long long total_dirty;
|
|
long long total_used;
|
|
long long total_dead;
|
|
long long total_dark;
|
|
};
|
|
|
|
struct ubifs_nnode;
|
|
|
|
/**
|
|
* struct ubifs_cnode - LEB Properties Tree common node.
|
|
* @parent: parent nnode
|
|
* @cnext: next cnode to commit
|
|
* @flags: flags (%DIRTY_LPT_NODE or %OBSOLETE_LPT_NODE)
|
|
* @iip: index in parent
|
|
* @level: level in the tree (zero for pnodes, greater than zero for nnodes)
|
|
* @num: node number
|
|
*/
|
|
struct ubifs_cnode {
|
|
struct ubifs_nnode *parent;
|
|
struct ubifs_cnode *cnext;
|
|
unsigned long flags;
|
|
int iip;
|
|
int level;
|
|
int num;
|
|
};
|
|
|
|
/**
|
|
* struct ubifs_pnode - LEB Properties Tree leaf node.
|
|
* @parent: parent nnode
|
|
* @cnext: next cnode to commit
|
|
* @flags: flags (%DIRTY_LPT_NODE or %OBSOLETE_LPT_NODE)
|
|
* @iip: index in parent
|
|
* @level: level in the tree (always zero for pnodes)
|
|
* @num: node number
|
|
* @lprops: LEB properties array
|
|
*/
|
|
struct ubifs_pnode {
|
|
struct ubifs_nnode *parent;
|
|
struct ubifs_cnode *cnext;
|
|
unsigned long flags;
|
|
int iip;
|
|
int level;
|
|
int num;
|
|
struct ubifs_lprops lprops[UBIFS_LPT_FANOUT];
|
|
};
|
|
|
|
/**
|
|
* struct ubifs_nbranch - LEB Properties Tree internal node branch.
|
|
* @lnum: LEB number of child
|
|
* @offs: offset of child
|
|
* @nnode: nnode child
|
|
* @pnode: pnode child
|
|
* @cnode: cnode child
|
|
*/
|
|
struct ubifs_nbranch {
|
|
int lnum;
|
|
int offs;
|
|
union {
|
|
struct ubifs_nnode *nnode;
|
|
struct ubifs_pnode *pnode;
|
|
struct ubifs_cnode *cnode;
|
|
};
|
|
};
|
|
|
|
/**
|
|
* struct ubifs_nnode - LEB Properties Tree internal node.
|
|
* @parent: parent nnode
|
|
* @cnext: next cnode to commit
|
|
* @flags: flags (%DIRTY_LPT_NODE or %OBSOLETE_LPT_NODE)
|
|
* @iip: index in parent
|
|
* @level: level in the tree (always greater than zero for nnodes)
|
|
* @num: node number
|
|
* @nbranch: branches to child nodes
|
|
*/
|
|
struct ubifs_nnode {
|
|
struct ubifs_nnode *parent;
|
|
struct ubifs_cnode *cnext;
|
|
unsigned long flags;
|
|
int iip;
|
|
int level;
|
|
int num;
|
|
struct ubifs_nbranch nbranch[UBIFS_LPT_FANOUT];
|
|
};
|
|
|
|
/**
|
|
* struct ubifs_lpt_heap - heap of categorized lprops.
|
|
* @arr: heap array
|
|
* @cnt: number in heap
|
|
* @max_cnt: maximum number allowed in heap
|
|
*
|
|
* There are %LPROPS_HEAP_CNT heaps.
|
|
*/
|
|
struct ubifs_lpt_heap {
|
|
struct ubifs_lprops **arr;
|
|
int cnt;
|
|
int max_cnt;
|
|
};
|
|
|
|
/*
|
|
* Return codes for LPT scan callback function.
|
|
*
|
|
* LPT_SCAN_CONTINUE: continue scanning
|
|
* LPT_SCAN_ADD: add the LEB properties scanned to the tree in memory
|
|
* LPT_SCAN_STOP: stop scanning
|
|
*/
|
|
enum {
|
|
LPT_SCAN_CONTINUE = 0,
|
|
LPT_SCAN_ADD = 1,
|
|
LPT_SCAN_STOP = 2,
|
|
};
|
|
|
|
struct ubifs_info;
|
|
|
|
/* Callback used by the 'ubifs_lpt_scan_nolock()' function */
|
|
typedef int (*ubifs_lpt_scan_callback)(struct ubifs_info *c,
|
|
const struct ubifs_lprops *lprops,
|
|
int in_tree, void *data);
|
|
|
|
/**
|
|
* struct ubifs_wbuf - UBIFS write-buffer.
|
|
* @c: UBIFS file-system description object
|
|
* @buf: write-buffer (of min. flash I/O unit size)
|
|
* @lnum: logical eraseblock number the write-buffer points to
|
|
* @offs: write-buffer offset in this logical eraseblock
|
|
* @avail: number of bytes available in the write-buffer
|
|
* @used: number of used bytes in the write-buffer
|
|
* @dtype: type of data stored in this LEB (%UBI_LONGTERM, %UBI_SHORTTERM,
|
|
* %UBI_UNKNOWN)
|
|
* @jhead: journal head the mutex belongs to (note, needed only to shut lockdep
|
|
* up by 'mutex_lock_nested()).
|
|
* @sync_callback: write-buffer synchronization callback
|
|
* @io_mutex: serializes write-buffer I/O
|
|
* @lock: serializes @buf, @lnum, @offs, @avail, @used, @next_ino and @inodes
|
|
* fields
|
|
* @timer: write-buffer timer
|
|
* @timeout: timer expire interval in jiffies
|
|
* @need_sync: it is set if its timer expired and needs sync
|
|
* @next_ino: points to the next position of the following inode number
|
|
* @inodes: stores the inode numbers of the nodes which are in wbuf
|
|
*
|
|
* The write-buffer synchronization callback is called when the write-buffer is
|
|
* synchronized in order to notify how much space was wasted due to
|
|
* write-buffer padding and how much free space is left in the LEB.
|
|
*
|
|
* Note: the fields @buf, @lnum, @offs, @avail and @used can be read under
|
|
* spin-lock or mutex because they are written under both mutex and spin-lock.
|
|
* @buf is appended to under mutex but overwritten under both mutex and
|
|
* spin-lock. Thus the data between @buf and @buf + @used can be read under
|
|
* spinlock.
|
|
*/
|
|
struct ubifs_wbuf {
|
|
struct ubifs_info *c;
|
|
void *buf;
|
|
int lnum;
|
|
int offs;
|
|
int avail;
|
|
int used;
|
|
int dtype;
|
|
int jhead;
|
|
int (*sync_callback)(struct ubifs_info *c, int lnum, int free, int pad);
|
|
struct mutex io_mutex;
|
|
spinlock_t lock;
|
|
int timeout;
|
|
int need_sync;
|
|
int next_ino;
|
|
ino_t *inodes;
|
|
};
|
|
|
|
/**
|
|
* struct ubifs_bud - bud logical eraseblock.
|
|
* @lnum: logical eraseblock number
|
|
* @start: where the (uncommitted) bud data starts
|
|
* @jhead: journal head number this bud belongs to
|
|
* @list: link in the list buds belonging to the same journal head
|
|
* @rb: link in the tree of all buds
|
|
*/
|
|
struct ubifs_bud {
|
|
int lnum;
|
|
int start;
|
|
int jhead;
|
|
struct list_head list;
|
|
struct rb_node rb;
|
|
};
|
|
|
|
/**
|
|
* struct ubifs_jhead - journal head.
|
|
* @wbuf: head's write-buffer
|
|
* @buds_list: list of bud LEBs belonging to this journal head
|
|
*
|
|
* Note, the @buds list is protected by the @c->buds_lock.
|
|
*/
|
|
struct ubifs_jhead {
|
|
struct ubifs_wbuf wbuf;
|
|
struct list_head buds_list;
|
|
};
|
|
|
|
/**
|
|
* struct ubifs_zbranch - key/coordinate/length branch stored in znodes.
|
|
* @key: key
|
|
* @znode: znode address in memory
|
|
* @lnum: LEB number of the target node (indexing node or data node)
|
|
* @offs: target node offset within @lnum
|
|
* @len: target node length
|
|
*/
|
|
struct ubifs_zbranch {
|
|
union ubifs_key key;
|
|
union {
|
|
struct ubifs_znode *znode;
|
|
void *leaf;
|
|
};
|
|
int lnum;
|
|
int offs;
|
|
int len;
|
|
};
|
|
|
|
/**
|
|
* struct ubifs_znode - in-memory representation of an indexing node.
|
|
* @parent: parent znode or NULL if it is the root
|
|
* @cnext: next znode to commit
|
|
* @flags: znode flags (%DIRTY_ZNODE, %COW_ZNODE or %OBSOLETE_ZNODE)
|
|
* @time: last access time (seconds)
|
|
* @level: level of the entry in the TNC tree
|
|
* @child_cnt: count of child znodes
|
|
* @iip: index in parent's zbranch array
|
|
* @alt: lower bound of key range has altered i.e. child inserted at slot 0
|
|
* @lnum: LEB number of the corresponding indexing node
|
|
* @offs: offset of the corresponding indexing node
|
|
* @len: length of the corresponding indexing node
|
|
* @zbranch: array of znode branches (@c->fanout elements)
|
|
*/
|
|
struct ubifs_znode {
|
|
struct ubifs_znode *parent;
|
|
struct ubifs_znode *cnext;
|
|
unsigned long flags;
|
|
unsigned long time;
|
|
int level;
|
|
int child_cnt;
|
|
int iip;
|
|
int alt;
|
|
#ifdef CONFIG_UBIFS_FS_DEBUG
|
|
int lnum, offs, len;
|
|
#endif
|
|
struct ubifs_zbranch zbranch[];
|
|
};
|
|
|
|
/**
|
|
* struct bu_info - bulk-read information.
|
|
* @key: first data node key
|
|
* @zbranch: zbranches of data nodes to bulk read
|
|
* @buf: buffer to read into
|
|
* @buf_len: buffer length
|
|
* @gc_seq: GC sequence number to detect races with GC
|
|
* @cnt: number of data nodes for bulk read
|
|
* @blk_cnt: number of data blocks including holes
|
|
* @oef: end of file reached
|
|
*/
|
|
struct bu_info {
|
|
union ubifs_key key;
|
|
struct ubifs_zbranch zbranch[UBIFS_MAX_BULK_READ];
|
|
void *buf;
|
|
int buf_len;
|
|
int gc_seq;
|
|
int cnt;
|
|
int blk_cnt;
|
|
int eof;
|
|
};
|
|
|
|
/**
|
|
* struct ubifs_node_range - node length range description data structure.
|
|
* @len: fixed node length
|
|
* @min_len: minimum possible node length
|
|
* @max_len: maximum possible node length
|
|
*
|
|
* If @max_len is %0, the node has fixed length @len.
|
|
*/
|
|
struct ubifs_node_range {
|
|
union {
|
|
int len;
|
|
int min_len;
|
|
};
|
|
int max_len;
|
|
};
|
|
|
|
/**
|
|
* struct ubifs_compressor - UBIFS compressor description structure.
|
|
* @compr_type: compressor type (%UBIFS_COMPR_LZO, etc)
|
|
* @cc: cryptoapi compressor handle
|
|
* @comp_mutex: mutex used during compression
|
|
* @decomp_mutex: mutex used during decompression
|
|
* @name: compressor name
|
|
* @capi_name: cryptoapi compressor name
|
|
*/
|
|
struct ubifs_compressor {
|
|
int compr_type;
|
|
char *name;
|
|
char *capi_name;
|
|
int (*decompress)(const unsigned char *in, size_t in_len,
|
|
unsigned char *out, size_t *out_len);
|
|
};
|
|
|
|
/**
|
|
* struct ubifs_budget_req - budget requirements of an operation.
|
|
*
|
|
* @fast: non-zero if the budgeting should try to acquire budget quickly and
|
|
* should not try to call write-back
|
|
* @recalculate: non-zero if @idx_growth, @data_growth, and @dd_growth fields
|
|
* have to be re-calculated
|
|
* @new_page: non-zero if the operation adds a new page
|
|
* @dirtied_page: non-zero if the operation makes a page dirty
|
|
* @new_dent: non-zero if the operation adds a new directory entry
|
|
* @mod_dent: non-zero if the operation removes or modifies an existing
|
|
* directory entry
|
|
* @new_ino: non-zero if the operation adds a new inode
|
|
* @new_ino_d: now much data newly created inode contains
|
|
* @dirtied_ino: how many inodes the operation makes dirty
|
|
* @dirtied_ino_d: now much data dirtied inode contains
|
|
* @idx_growth: how much the index will supposedly grow
|
|
* @data_growth: how much new data the operation will supposedly add
|
|
* @dd_growth: how much data that makes other data dirty the operation will
|
|
* supposedly add
|
|
*
|
|
* @idx_growth, @data_growth and @dd_growth are not used in budget request. The
|
|
* budgeting subsystem caches index and data growth values there to avoid
|
|
* re-calculating them when the budget is released. However, if @idx_growth is
|
|
* %-1, it is calculated by the release function using other fields.
|
|
*
|
|
* An inode may contain 4KiB of data at max., thus the widths of @new_ino_d
|
|
* is 13 bits, and @dirtied_ino_d - 15, because up to 4 inodes may be made
|
|
* dirty by the re-name operation.
|
|
*
|
|
* Note, UBIFS aligns node lengths to 8-bytes boundary, so the requester has to
|
|
* make sure the amount of inode data which contribute to @new_ino_d and
|
|
* @dirtied_ino_d fields are aligned.
|
|
*/
|
|
struct ubifs_budget_req {
|
|
unsigned int fast:1;
|
|
unsigned int recalculate:1;
|
|
#ifndef UBIFS_DEBUG
|
|
unsigned int new_page:1;
|
|
unsigned int dirtied_page:1;
|
|
unsigned int new_dent:1;
|
|
unsigned int mod_dent:1;
|
|
unsigned int new_ino:1;
|
|
unsigned int new_ino_d:13;
|
|
unsigned int dirtied_ino:4;
|
|
unsigned int dirtied_ino_d:15;
|
|
#else
|
|
/* Not bit-fields to check for overflows */
|
|
unsigned int new_page;
|
|
unsigned int dirtied_page;
|
|
unsigned int new_dent;
|
|
unsigned int mod_dent;
|
|
unsigned int new_ino;
|
|
unsigned int new_ino_d;
|
|
unsigned int dirtied_ino;
|
|
unsigned int dirtied_ino_d;
|
|
#endif
|
|
int idx_growth;
|
|
int data_growth;
|
|
int dd_growth;
|
|
};
|
|
|
|
/**
|
|
* struct ubifs_orphan - stores the inode number of an orphan.
|
|
* @rb: rb-tree node of rb-tree of orphans sorted by inode number
|
|
* @list: list head of list of orphans in order added
|
|
* @new_list: list head of list of orphans added since the last commit
|
|
* @cnext: next orphan to commit
|
|
* @dnext: next orphan to delete
|
|
* @inum: inode number
|
|
* @new: %1 => added since the last commit, otherwise %0
|
|
*/
|
|
struct ubifs_orphan {
|
|
struct rb_node rb;
|
|
struct list_head list;
|
|
struct list_head new_list;
|
|
struct ubifs_orphan *cnext;
|
|
struct ubifs_orphan *dnext;
|
|
ino_t inum;
|
|
int new;
|
|
};
|
|
|
|
/**
|
|
* struct ubifs_mount_opts - UBIFS-specific mount options information.
|
|
* @unmount_mode: selected unmount mode (%0 default, %1 normal, %2 fast)
|
|
* @bulk_read: enable/disable bulk-reads (%0 default, %1 disabe, %2 enable)
|
|
* @chk_data_crc: enable/disable CRC data checking when reading data nodes
|
|
* (%0 default, %1 disabe, %2 enable)
|
|
* @override_compr: override default compressor (%0 - do not override and use
|
|
* superblock compressor, %1 - override and use compressor
|
|
* specified in @compr_type)
|
|
* @compr_type: compressor type to override the superblock compressor with
|
|
* (%UBIFS_COMPR_NONE, etc)
|
|
*/
|
|
struct ubifs_mount_opts {
|
|
unsigned int unmount_mode:2;
|
|
unsigned int bulk_read:2;
|
|
unsigned int chk_data_crc:2;
|
|
unsigned int override_compr:1;
|
|
unsigned int compr_type:2;
|
|
};
|
|
|
|
struct ubifs_debug_info;
|
|
|
|
/**
|
|
* struct ubifs_info - UBIFS file-system description data structure
|
|
* (per-superblock).
|
|
* @vfs_sb: VFS @struct super_block object
|
|
* @bdi: backing device info object to make VFS happy and disable read-ahead
|
|
*
|
|
* @highest_inum: highest used inode number
|
|
* @max_sqnum: current global sequence number
|
|
* @cmt_no: commit number of the last successfully completed commit, protected
|
|
* by @commit_sem
|
|
* @cnt_lock: protects @highest_inum and @max_sqnum counters
|
|
* @fmt_version: UBIFS on-flash format version
|
|
* @ro_compat_version: R/O compatibility version
|
|
* @uuid: UUID from super block
|
|
*
|
|
* @lhead_lnum: log head logical eraseblock number
|
|
* @lhead_offs: log head offset
|
|
* @ltail_lnum: log tail logical eraseblock number (offset is always 0)
|
|
* @log_mutex: protects the log, @lhead_lnum, @lhead_offs, @ltail_lnum, and
|
|
* @bud_bytes
|
|
* @min_log_bytes: minimum required number of bytes in the log
|
|
* @cmt_bud_bytes: used during commit to temporarily amount of bytes in
|
|
* committed buds
|
|
*
|
|
* @buds: tree of all buds indexed by bud LEB number
|
|
* @bud_bytes: how many bytes of flash is used by buds
|
|
* @buds_lock: protects the @buds tree, @bud_bytes, and per-journal head bud
|
|
* lists
|
|
* @jhead_cnt: count of journal heads
|
|
* @jheads: journal heads (head zero is base head)
|
|
* @max_bud_bytes: maximum number of bytes allowed in buds
|
|
* @bg_bud_bytes: number of bud bytes when background commit is initiated
|
|
* @old_buds: buds to be released after commit ends
|
|
* @max_bud_cnt: maximum number of buds
|
|
*
|
|
* @commit_sem: synchronizes committer with other processes
|
|
* @cmt_state: commit state
|
|
* @cs_lock: commit state lock
|
|
* @cmt_wq: wait queue to sleep on if the log is full and a commit is running
|
|
*
|
|
* @big_lpt: flag that LPT is too big to write whole during commit
|
|
* @no_chk_data_crc: do not check CRCs when reading data nodes (except during
|
|
* recovery)
|
|
* @bulk_read: enable bulk-reads
|
|
* @default_compr: default compression algorithm (%UBIFS_COMPR_LZO, etc)
|
|
* @rw_incompat: the media is not R/W compatible
|
|
*
|
|
* @tnc_mutex: protects the Tree Node Cache (TNC), @zroot, @cnext, @enext, and
|
|
* @calc_idx_sz
|
|
* @zroot: zbranch which points to the root index node and znode
|
|
* @cnext: next znode to commit
|
|
* @enext: next znode to commit to empty space
|
|
* @gap_lebs: array of LEBs used by the in-gaps commit method
|
|
* @cbuf: commit buffer
|
|
* @ileb_buf: buffer for commit in-the-gaps method
|
|
* @ileb_len: length of data in ileb_buf
|
|
* @ihead_lnum: LEB number of index head
|
|
* @ihead_offs: offset of index head
|
|
* @ilebs: pre-allocated index LEBs
|
|
* @ileb_cnt: number of pre-allocated index LEBs
|
|
* @ileb_nxt: next pre-allocated index LEBs
|
|
* @old_idx: tree of index nodes obsoleted since the last commit start
|
|
* @bottom_up_buf: a buffer which is used by 'dirty_cow_bottom_up()' in tnc.c
|
|
*
|
|
* @mst_node: master node
|
|
* @mst_offs: offset of valid master node
|
|
* @mst_mutex: protects the master node area, @mst_node, and @mst_offs
|
|
*
|
|
* @max_bu_buf_len: maximum bulk-read buffer length
|
|
* @bu_mutex: protects the pre-allocated bulk-read buffer and @c->bu
|
|
* @bu: pre-allocated bulk-read information
|
|
*
|
|
* @log_lebs: number of logical eraseblocks in the log
|
|
* @log_bytes: log size in bytes
|
|
* @log_last: last LEB of the log
|
|
* @lpt_lebs: number of LEBs used for lprops table
|
|
* @lpt_first: first LEB of the lprops table area
|
|
* @lpt_last: last LEB of the lprops table area
|
|
* @orph_lebs: number of LEBs used for the orphan area
|
|
* @orph_first: first LEB of the orphan area
|
|
* @orph_last: last LEB of the orphan area
|
|
* @main_lebs: count of LEBs in the main area
|
|
* @main_first: first LEB of the main area
|
|
* @main_bytes: main area size in bytes
|
|
*
|
|
* @key_hash_type: type of the key hash
|
|
* @key_hash: direntry key hash function
|
|
* @key_fmt: key format
|
|
* @key_len: key length
|
|
* @fanout: fanout of the index tree (number of links per indexing node)
|
|
*
|
|
* @min_io_size: minimal input/output unit size
|
|
* @min_io_shift: number of bits in @min_io_size minus one
|
|
* @leb_size: logical eraseblock size in bytes
|
|
* @half_leb_size: half LEB size
|
|
* @leb_cnt: count of logical eraseblocks
|
|
* @max_leb_cnt: maximum count of logical eraseblocks
|
|
* @old_leb_cnt: count of logical eraseblocks before re-size
|
|
* @ro_media: the underlying UBI volume is read-only
|
|
*
|
|
* @dirty_pg_cnt: number of dirty pages (not used)
|
|
* @dirty_zn_cnt: number of dirty znodes
|
|
* @clean_zn_cnt: number of clean znodes
|
|
*
|
|
* @budg_idx_growth: amount of bytes budgeted for index growth
|
|
* @budg_data_growth: amount of bytes budgeted for cached data
|
|
* @budg_dd_growth: amount of bytes budgeted for cached data that will make
|
|
* other data dirty
|
|
* @budg_uncommitted_idx: amount of bytes were budgeted for growth of the index,
|
|
* but which still have to be taken into account because
|
|
* the index has not been committed so far
|
|
* @space_lock: protects @budg_idx_growth, @budg_data_growth, @budg_dd_growth,
|
|
* @budg_uncommited_idx, @min_idx_lebs, @old_idx_sz, @lst,
|
|
* @nospace, and @nospace_rp;
|
|
* @min_idx_lebs: minimum number of LEBs required for the index
|
|
* @old_idx_sz: size of index on flash
|
|
* @calc_idx_sz: temporary variable which is used to calculate new index size
|
|
* (contains accurate new index size at end of TNC commit start)
|
|
* @lst: lprops statistics
|
|
* @nospace: non-zero if the file-system does not have flash space (used as
|
|
* optimization)
|
|
* @nospace_rp: the same as @nospace, but additionally means that even reserved
|
|
* pool is full
|
|
*
|
|
* @page_budget: budget for a page
|
|
* @inode_budget: budget for an inode
|
|
* @dent_budget: budget for a directory entry
|
|
*
|
|
* @ref_node_alsz: size of the LEB reference node aligned to the min. flash
|
|
* I/O unit
|
|
* @mst_node_alsz: master node aligned size
|
|
* @min_idx_node_sz: minimum indexing node aligned on 8-bytes boundary
|
|
* @max_idx_node_sz: maximum indexing node aligned on 8-bytes boundary
|
|
* @max_inode_sz: maximum possible inode size in bytes
|
|
* @max_znode_sz: size of znode in bytes
|
|
*
|
|
* @leb_overhead: how many bytes are wasted in an LEB when it is filled with
|
|
* data nodes of maximum size - used in free space reporting
|
|
* @dead_wm: LEB dead space watermark
|
|
* @dark_wm: LEB dark space watermark
|
|
* @block_cnt: count of 4KiB blocks on the FS
|
|
*
|
|
* @ranges: UBIFS node length ranges
|
|
* @ubi: UBI volume descriptor
|
|
* @di: UBI device information
|
|
* @vi: UBI volume information
|
|
*
|
|
* @orph_tree: rb-tree of orphan inode numbers
|
|
* @orph_list: list of orphan inode numbers in order added
|
|
* @orph_new: list of orphan inode numbers added since last commit
|
|
* @orph_cnext: next orphan to commit
|
|
* @orph_dnext: next orphan to delete
|
|
* @orphan_lock: lock for orph_tree and orph_new
|
|
* @orph_buf: buffer for orphan nodes
|
|
* @new_orphans: number of orphans since last commit
|
|
* @cmt_orphans: number of orphans being committed
|
|
* @tot_orphans: number of orphans in the rb_tree
|
|
* @max_orphans: maximum number of orphans allowed
|
|
* @ohead_lnum: orphan head LEB number
|
|
* @ohead_offs: orphan head offset
|
|
* @no_orphs: non-zero if there are no orphans
|
|
*
|
|
* @bgt: UBIFS background thread
|
|
* @bgt_name: background thread name
|
|
* @need_bgt: if background thread should run
|
|
* @need_wbuf_sync: if write-buffers have to be synchronized
|
|
*
|
|
* @gc_lnum: LEB number used for garbage collection
|
|
* @sbuf: a buffer of LEB size used by GC and replay for scanning
|
|
* @idx_gc: list of index LEBs that have been garbage collected
|
|
* @idx_gc_cnt: number of elements on the idx_gc list
|
|
* @gc_seq: incremented for every non-index LEB garbage collected
|
|
* @gced_lnum: last non-index LEB that was garbage collected
|
|
*
|
|
* @infos_list: links all 'ubifs_info' objects
|
|
* @umount_mutex: serializes shrinker and un-mount
|
|
* @shrinker_run_no: shrinker run number
|
|
*
|
|
* @space_bits: number of bits needed to record free or dirty space
|
|
* @lpt_lnum_bits: number of bits needed to record a LEB number in the LPT
|
|
* @lpt_offs_bits: number of bits needed to record an offset in the LPT
|
|
* @lpt_spc_bits: number of bits needed to space in the LPT
|
|
* @pcnt_bits: number of bits needed to record pnode or nnode number
|
|
* @lnum_bits: number of bits needed to record LEB number
|
|
* @nnode_sz: size of on-flash nnode
|
|
* @pnode_sz: size of on-flash pnode
|
|
* @ltab_sz: size of on-flash LPT lprops table
|
|
* @lsave_sz: size of on-flash LPT save table
|
|
* @pnode_cnt: number of pnodes
|
|
* @nnode_cnt: number of nnodes
|
|
* @lpt_hght: height of the LPT
|
|
* @pnodes_have: number of pnodes in memory
|
|
*
|
|
* @lp_mutex: protects lprops table and all the other lprops-related fields
|
|
* @lpt_lnum: LEB number of the root nnode of the LPT
|
|
* @lpt_offs: offset of the root nnode of the LPT
|
|
* @nhead_lnum: LEB number of LPT head
|
|
* @nhead_offs: offset of LPT head
|
|
* @lpt_drty_flgs: dirty flags for LPT special nodes e.g. ltab
|
|
* @dirty_nn_cnt: number of dirty nnodes
|
|
* @dirty_pn_cnt: number of dirty pnodes
|
|
* @check_lpt_free: flag that indicates LPT GC may be needed
|
|
* @lpt_sz: LPT size
|
|
* @lpt_nod_buf: buffer for an on-flash nnode or pnode
|
|
* @lpt_buf: buffer of LEB size used by LPT
|
|
* @nroot: address in memory of the root nnode of the LPT
|
|
* @lpt_cnext: next LPT node to commit
|
|
* @lpt_heap: array of heaps of categorized lprops
|
|
* @dirty_idx: a (reverse sorted) copy of the LPROPS_DIRTY_IDX heap as at
|
|
* previous commit start
|
|
* @uncat_list: list of un-categorized LEBs
|
|
* @empty_list: list of empty LEBs
|
|
* @freeable_list: list of freeable non-index LEBs (free + dirty == leb_size)
|
|
* @frdi_idx_list: list of freeable index LEBs (free + dirty == leb_size)
|
|
* @freeable_cnt: number of freeable LEBs in @freeable_list
|
|
*
|
|
* @ltab_lnum: LEB number of LPT's own lprops table
|
|
* @ltab_offs: offset of LPT's own lprops table
|
|
* @ltab: LPT's own lprops table
|
|
* @ltab_cmt: LPT's own lprops table (commit copy)
|
|
* @lsave_cnt: number of LEB numbers in LPT's save table
|
|
* @lsave_lnum: LEB number of LPT's save table
|
|
* @lsave_offs: offset of LPT's save table
|
|
* @lsave: LPT's save table
|
|
* @lscan_lnum: LEB number of last LPT scan
|
|
*
|
|
* @rp_size: size of the reserved pool in bytes
|
|
* @report_rp_size: size of the reserved pool reported to user-space
|
|
* @rp_uid: reserved pool user ID
|
|
* @rp_gid: reserved pool group ID
|
|
*
|
|
* @empty: if the UBI device is empty
|
|
* @replay_tree: temporary tree used during journal replay
|
|
* @replay_list: temporary list used during journal replay
|
|
* @replay_buds: list of buds to replay
|
|
* @cs_sqnum: sequence number of first node in the log (commit start node)
|
|
* @replay_sqnum: sequence number of node currently being replayed
|
|
* @need_recovery: file-system needs recovery
|
|
* @replaying: set to %1 during journal replay
|
|
* @unclean_leb_list: LEBs to recover when mounting ro to rw
|
|
* @rcvrd_mst_node: recovered master node to write when mounting ro to rw
|
|
* @size_tree: inode size information for recovery
|
|
* @remounting_rw: set while remounting from ro to rw (sb flags have MS_RDONLY)
|
|
* @always_chk_crc: always check CRCs (while mounting and remounting rw)
|
|
* @mount_opts: UBIFS-specific mount options
|
|
*
|
|
* @dbg: debugging-related information
|
|
*/
|
|
struct ubifs_info {
|
|
struct super_block *vfs_sb;
|
|
|
|
ino_t highest_inum;
|
|
unsigned long long max_sqnum;
|
|
unsigned long long cmt_no;
|
|
spinlock_t cnt_lock;
|
|
int fmt_version;
|
|
int ro_compat_version;
|
|
unsigned char uuid[16];
|
|
|
|
int lhead_lnum;
|
|
int lhead_offs;
|
|
int ltail_lnum;
|
|
struct mutex log_mutex;
|
|
int min_log_bytes;
|
|
long long cmt_bud_bytes;
|
|
|
|
struct rb_root buds;
|
|
long long bud_bytes;
|
|
spinlock_t buds_lock;
|
|
int jhead_cnt;
|
|
struct ubifs_jhead *jheads;
|
|
long long max_bud_bytes;
|
|
long long bg_bud_bytes;
|
|
struct list_head old_buds;
|
|
int max_bud_cnt;
|
|
|
|
struct rw_semaphore commit_sem;
|
|
int cmt_state;
|
|
spinlock_t cs_lock;
|
|
wait_queue_head_t cmt_wq;
|
|
|
|
unsigned int big_lpt:1;
|
|
unsigned int no_chk_data_crc:1;
|
|
unsigned int bulk_read:1;
|
|
unsigned int default_compr:2;
|
|
unsigned int rw_incompat:1;
|
|
|
|
struct mutex tnc_mutex;
|
|
struct ubifs_zbranch zroot;
|
|
struct ubifs_znode *cnext;
|
|
struct ubifs_znode *enext;
|
|
int *gap_lebs;
|
|
void *cbuf;
|
|
void *ileb_buf;
|
|
int ileb_len;
|
|
int ihead_lnum;
|
|
int ihead_offs;
|
|
int *ilebs;
|
|
int ileb_cnt;
|
|
int ileb_nxt;
|
|
struct rb_root old_idx;
|
|
int *bottom_up_buf;
|
|
|
|
struct ubifs_mst_node *mst_node;
|
|
int mst_offs;
|
|
struct mutex mst_mutex;
|
|
|
|
int max_bu_buf_len;
|
|
struct mutex bu_mutex;
|
|
struct bu_info bu;
|
|
|
|
int log_lebs;
|
|
long long log_bytes;
|
|
int log_last;
|
|
int lpt_lebs;
|
|
int lpt_first;
|
|
int lpt_last;
|
|
int orph_lebs;
|
|
int orph_first;
|
|
int orph_last;
|
|
int main_lebs;
|
|
int main_first;
|
|
long long main_bytes;
|
|
|
|
uint8_t key_hash_type;
|
|
uint32_t (*key_hash)(const char *str, int len);
|
|
int key_fmt;
|
|
int key_len;
|
|
int fanout;
|
|
|
|
int min_io_size;
|
|
int min_io_shift;
|
|
int leb_size;
|
|
int half_leb_size;
|
|
int leb_cnt;
|
|
int max_leb_cnt;
|
|
int old_leb_cnt;
|
|
int ro_media;
|
|
|
|
long long budg_idx_growth;
|
|
long long budg_data_growth;
|
|
long long budg_dd_growth;
|
|
long long budg_uncommitted_idx;
|
|
spinlock_t space_lock;
|
|
int min_idx_lebs;
|
|
unsigned long long old_idx_sz;
|
|
unsigned long long calc_idx_sz;
|
|
struct ubifs_lp_stats lst;
|
|
unsigned int nospace:1;
|
|
unsigned int nospace_rp:1;
|
|
|
|
int page_budget;
|
|
int inode_budget;
|
|
int dent_budget;
|
|
|
|
int ref_node_alsz;
|
|
int mst_node_alsz;
|
|
int min_idx_node_sz;
|
|
int max_idx_node_sz;
|
|
long long max_inode_sz;
|
|
int max_znode_sz;
|
|
|
|
int leb_overhead;
|
|
int dead_wm;
|
|
int dark_wm;
|
|
int block_cnt;
|
|
|
|
struct ubifs_node_range ranges[UBIFS_NODE_TYPES_CNT];
|
|
struct ubi_volume_desc *ubi;
|
|
struct ubi_device_info di;
|
|
struct ubi_volume_info vi;
|
|
|
|
struct rb_root orph_tree;
|
|
struct list_head orph_list;
|
|
struct list_head orph_new;
|
|
struct ubifs_orphan *orph_cnext;
|
|
struct ubifs_orphan *orph_dnext;
|
|
spinlock_t orphan_lock;
|
|
void *orph_buf;
|
|
int new_orphans;
|
|
int cmt_orphans;
|
|
int tot_orphans;
|
|
int max_orphans;
|
|
int ohead_lnum;
|
|
int ohead_offs;
|
|
int no_orphs;
|
|
|
|
struct task_struct *bgt;
|
|
char bgt_name[sizeof(BGT_NAME_PATTERN) + 9];
|
|
int need_bgt;
|
|
int need_wbuf_sync;
|
|
|
|
int gc_lnum;
|
|
void *sbuf;
|
|
struct list_head idx_gc;
|
|
int idx_gc_cnt;
|
|
int gc_seq;
|
|
int gced_lnum;
|
|
|
|
struct list_head infos_list;
|
|
struct mutex umount_mutex;
|
|
unsigned int shrinker_run_no;
|
|
|
|
int space_bits;
|
|
int lpt_lnum_bits;
|
|
int lpt_offs_bits;
|
|
int lpt_spc_bits;
|
|
int pcnt_bits;
|
|
int lnum_bits;
|
|
int nnode_sz;
|
|
int pnode_sz;
|
|
int ltab_sz;
|
|
int lsave_sz;
|
|
int pnode_cnt;
|
|
int nnode_cnt;
|
|
int lpt_hght;
|
|
int pnodes_have;
|
|
|
|
struct mutex lp_mutex;
|
|
int lpt_lnum;
|
|
int lpt_offs;
|
|
int nhead_lnum;
|
|
int nhead_offs;
|
|
int lpt_drty_flgs;
|
|
int dirty_nn_cnt;
|
|
int dirty_pn_cnt;
|
|
int check_lpt_free;
|
|
long long lpt_sz;
|
|
void *lpt_nod_buf;
|
|
void *lpt_buf;
|
|
struct ubifs_nnode *nroot;
|
|
struct ubifs_cnode *lpt_cnext;
|
|
struct ubifs_lpt_heap lpt_heap[LPROPS_HEAP_CNT];
|
|
struct ubifs_lpt_heap dirty_idx;
|
|
struct list_head uncat_list;
|
|
struct list_head empty_list;
|
|
struct list_head freeable_list;
|
|
struct list_head frdi_idx_list;
|
|
int freeable_cnt;
|
|
|
|
int ltab_lnum;
|
|
int ltab_offs;
|
|
struct ubifs_lpt_lprops *ltab;
|
|
struct ubifs_lpt_lprops *ltab_cmt;
|
|
int lsave_cnt;
|
|
int lsave_lnum;
|
|
int lsave_offs;
|
|
int *lsave;
|
|
int lscan_lnum;
|
|
|
|
long long rp_size;
|
|
long long report_rp_size;
|
|
uid_t rp_uid;
|
|
gid_t rp_gid;
|
|
|
|
/* The below fields are used only during mounting and re-mounting */
|
|
int empty;
|
|
struct rb_root replay_tree;
|
|
struct list_head replay_list;
|
|
struct list_head replay_buds;
|
|
unsigned long long cs_sqnum;
|
|
unsigned long long replay_sqnum;
|
|
int need_recovery;
|
|
int replaying;
|
|
struct list_head unclean_leb_list;
|
|
struct ubifs_mst_node *rcvrd_mst_node;
|
|
struct rb_root size_tree;
|
|
int remounting_rw;
|
|
int always_chk_crc;
|
|
struct ubifs_mount_opts mount_opts;
|
|
|
|
#ifdef CONFIG_UBIFS_FS_DEBUG
|
|
struct ubifs_debug_info *dbg;
|
|
#endif
|
|
};
|
|
|
|
extern spinlock_t ubifs_infos_lock;
|
|
extern struct kmem_cache *ubifs_inode_slab;
|
|
extern const struct super_operations ubifs_super_operations;
|
|
extern const struct address_space_operations ubifs_file_address_operations;
|
|
extern const struct file_operations ubifs_file_operations;
|
|
extern const struct inode_operations ubifs_file_inode_operations;
|
|
extern const struct file_operations ubifs_dir_operations;
|
|
extern const struct inode_operations ubifs_dir_inode_operations;
|
|
extern const struct inode_operations ubifs_symlink_inode_operations;
|
|
extern struct backing_dev_info ubifs_backing_dev_info;
|
|
extern struct ubifs_compressor *ubifs_compressors[UBIFS_COMPR_TYPES_CNT];
|
|
|
|
/* io.c */
|
|
void ubifs_ro_mode(struct ubifs_info *c, int err);
|
|
int ubifs_wbuf_write_nolock(struct ubifs_wbuf *wbuf, void *buf, int len);
|
|
int ubifs_wbuf_seek_nolock(struct ubifs_wbuf *wbuf, int lnum, int offs,
|
|
int dtype);
|
|
int ubifs_wbuf_init(struct ubifs_info *c, struct ubifs_wbuf *wbuf);
|
|
int ubifs_read_node(const struct ubifs_info *c, void *buf, int type, int len,
|
|
int lnum, int offs);
|
|
int ubifs_read_node_wbuf(struct ubifs_wbuf *wbuf, void *buf, int type, int len,
|
|
int lnum, int offs);
|
|
int ubifs_write_node(struct ubifs_info *c, void *node, int len, int lnum,
|
|
int offs, int dtype);
|
|
int ubifs_check_node(const struct ubifs_info *c, const void *buf, int lnum,
|
|
int offs, int quiet, int must_chk_crc);
|
|
void ubifs_prepare_node(struct ubifs_info *c, void *buf, int len, int pad);
|
|
void ubifs_prep_grp_node(struct ubifs_info *c, void *node, int len, int last);
|
|
int ubifs_io_init(struct ubifs_info *c);
|
|
void ubifs_pad(const struct ubifs_info *c, void *buf, int pad);
|
|
int ubifs_wbuf_sync_nolock(struct ubifs_wbuf *wbuf);
|
|
int ubifs_bg_wbufs_sync(struct ubifs_info *c);
|
|
void ubifs_wbuf_add_ino_nolock(struct ubifs_wbuf *wbuf, ino_t inum);
|
|
int ubifs_sync_wbufs_by_inode(struct ubifs_info *c, struct inode *inode);
|
|
|
|
/* scan.c */
|
|
struct ubifs_scan_leb *ubifs_scan(const struct ubifs_info *c, int lnum,
|
|
int offs, void *sbuf);
|
|
void ubifs_scan_destroy(struct ubifs_scan_leb *sleb);
|
|
int ubifs_scan_a_node(const struct ubifs_info *c, void *buf, int len, int lnum,
|
|
int offs, int quiet);
|
|
struct ubifs_scan_leb *ubifs_start_scan(const struct ubifs_info *c, int lnum,
|
|
int offs, void *sbuf);
|
|
void ubifs_end_scan(const struct ubifs_info *c, struct ubifs_scan_leb *sleb,
|
|
int lnum, int offs);
|
|
int ubifs_add_snod(const struct ubifs_info *c, struct ubifs_scan_leb *sleb,
|
|
void *buf, int offs);
|
|
void ubifs_scanned_corruption(const struct ubifs_info *c, int lnum, int offs,
|
|
void *buf);
|
|
|
|
/* log.c */
|
|
void ubifs_add_bud(struct ubifs_info *c, struct ubifs_bud *bud);
|
|
void ubifs_create_buds_lists(struct ubifs_info *c);
|
|
int ubifs_add_bud_to_log(struct ubifs_info *c, int jhead, int lnum, int offs);
|
|
struct ubifs_bud *ubifs_search_bud(struct ubifs_info *c, int lnum);
|
|
struct ubifs_wbuf *ubifs_get_wbuf(struct ubifs_info *c, int lnum);
|
|
int ubifs_log_start_commit(struct ubifs_info *c, int *ltail_lnum);
|
|
int ubifs_log_end_commit(struct ubifs_info *c, int new_ltail_lnum);
|
|
int ubifs_log_post_commit(struct ubifs_info *c, int old_ltail_lnum);
|
|
int ubifs_consolidate_log(struct ubifs_info *c);
|
|
|
|
/* journal.c */
|
|
int ubifs_jnl_update(struct ubifs_info *c, const struct inode *dir,
|
|
const struct qstr *nm, const struct inode *inode,
|
|
int deletion, int xent);
|
|
int ubifs_jnl_write_data(struct ubifs_info *c, const struct inode *inode,
|
|
const union ubifs_key *key, const void *buf, int len);
|
|
int ubifs_jnl_write_inode(struct ubifs_info *c, const struct inode *inode);
|
|
int ubifs_jnl_delete_inode(struct ubifs_info *c, const struct inode *inode);
|
|
int ubifs_jnl_rename(struct ubifs_info *c, const struct inode *old_dir,
|
|
const struct dentry *old_dentry,
|
|
const struct inode *new_dir,
|
|
const struct dentry *new_dentry, int sync);
|
|
int ubifs_jnl_truncate(struct ubifs_info *c, const struct inode *inode,
|
|
loff_t old_size, loff_t new_size);
|
|
int ubifs_jnl_delete_xattr(struct ubifs_info *c, const struct inode *host,
|
|
const struct inode *inode, const struct qstr *nm);
|
|
int ubifs_jnl_change_xattr(struct ubifs_info *c, const struct inode *inode1,
|
|
const struct inode *inode2);
|
|
|
|
/* budget.c */
|
|
int ubifs_budget_space(struct ubifs_info *c, struct ubifs_budget_req *req);
|
|
void ubifs_release_budget(struct ubifs_info *c, struct ubifs_budget_req *req);
|
|
void ubifs_release_dirty_inode_budget(struct ubifs_info *c,
|
|
struct ubifs_inode *ui);
|
|
int ubifs_budget_inode_op(struct ubifs_info *c, struct inode *inode,
|
|
struct ubifs_budget_req *req);
|
|
void ubifs_release_ino_dirty(struct ubifs_info *c, struct inode *inode,
|
|
struct ubifs_budget_req *req);
|
|
void ubifs_cancel_ino_op(struct ubifs_info *c, struct inode *inode,
|
|
struct ubifs_budget_req *req);
|
|
long long ubifs_get_free_space(struct ubifs_info *c);
|
|
long long ubifs_get_free_space_nolock(struct ubifs_info *c);
|
|
int ubifs_calc_min_idx_lebs(struct ubifs_info *c);
|
|
void ubifs_convert_page_budget(struct ubifs_info *c);
|
|
long long ubifs_reported_space(const struct ubifs_info *c, long long free);
|
|
long long ubifs_calc_available(const struct ubifs_info *c, int min_idx_lebs);
|
|
|
|
/* find.c */
|
|
int ubifs_find_free_space(struct ubifs_info *c, int min_space, int *free,
|
|
int squeeze);
|
|
int ubifs_find_free_leb_for_idx(struct ubifs_info *c);
|
|
int ubifs_find_dirty_leb(struct ubifs_info *c, struct ubifs_lprops *ret_lp,
|
|
int min_space, int pick_free);
|
|
int ubifs_find_dirty_idx_leb(struct ubifs_info *c);
|
|
int ubifs_save_dirty_idx_lnums(struct ubifs_info *c);
|
|
|
|
/* tnc.c */
|
|
int ubifs_lookup_level0(struct ubifs_info *c, const union ubifs_key *key,
|
|
struct ubifs_znode **zn, int *n);
|
|
int ubifs_tnc_lookup_nm(struct ubifs_info *c, const union ubifs_key *key,
|
|
void *node, const struct qstr *nm);
|
|
int ubifs_tnc_locate(struct ubifs_info *c, const union ubifs_key *key,
|
|
void *node, int *lnum, int *offs);
|
|
int ubifs_tnc_add(struct ubifs_info *c, const union ubifs_key *key, int lnum,
|
|
int offs, int len);
|
|
int ubifs_tnc_replace(struct ubifs_info *c, const union ubifs_key *key,
|
|
int old_lnum, int old_offs, int lnum, int offs, int len);
|
|
int ubifs_tnc_add_nm(struct ubifs_info *c, const union ubifs_key *key,
|
|
int lnum, int offs, int len, const struct qstr *nm);
|
|
int ubifs_tnc_remove(struct ubifs_info *c, const union ubifs_key *key);
|
|
int ubifs_tnc_remove_nm(struct ubifs_info *c, const union ubifs_key *key,
|
|
const struct qstr *nm);
|
|
int ubifs_tnc_remove_range(struct ubifs_info *c, union ubifs_key *from_key,
|
|
union ubifs_key *to_key);
|
|
int ubifs_tnc_remove_ino(struct ubifs_info *c, ino_t inum);
|
|
struct ubifs_dent_node *ubifs_tnc_next_ent(struct ubifs_info *c,
|
|
union ubifs_key *key,
|
|
const struct qstr *nm);
|
|
void ubifs_tnc_close(struct ubifs_info *c);
|
|
int ubifs_tnc_has_node(struct ubifs_info *c, union ubifs_key *key, int level,
|
|
int lnum, int offs, int is_idx);
|
|
int ubifs_dirty_idx_node(struct ubifs_info *c, union ubifs_key *key, int level,
|
|
int lnum, int offs);
|
|
/* Shared by tnc.c for tnc_commit.c */
|
|
void destroy_old_idx(struct ubifs_info *c);
|
|
int is_idx_node_in_tnc(struct ubifs_info *c, union ubifs_key *key, int level,
|
|
int lnum, int offs);
|
|
int insert_old_idx_znode(struct ubifs_info *c, struct ubifs_znode *znode);
|
|
int ubifs_tnc_get_bu_keys(struct ubifs_info *c, struct bu_info *bu);
|
|
int ubifs_tnc_bulk_read(struct ubifs_info *c, struct bu_info *bu);
|
|
|
|
/* tnc_misc.c */
|
|
struct ubifs_znode *ubifs_tnc_levelorder_next(struct ubifs_znode *zr,
|
|
struct ubifs_znode *znode);
|
|
int ubifs_search_zbranch(const struct ubifs_info *c,
|
|
const struct ubifs_znode *znode,
|
|
const union ubifs_key *key, int *n);
|
|
struct ubifs_znode *ubifs_tnc_postorder_first(struct ubifs_znode *znode);
|
|
struct ubifs_znode *ubifs_tnc_postorder_next(struct ubifs_znode *znode);
|
|
long ubifs_destroy_tnc_subtree(struct ubifs_znode *zr);
|
|
struct ubifs_znode *ubifs_load_znode(struct ubifs_info *c,
|
|
struct ubifs_zbranch *zbr,
|
|
struct ubifs_znode *parent, int iip);
|
|
int ubifs_tnc_read_node(struct ubifs_info *c, struct ubifs_zbranch *zbr,
|
|
void *node);
|
|
|
|
/* tnc_commit.c */
|
|
int ubifs_tnc_start_commit(struct ubifs_info *c, struct ubifs_zbranch *zroot);
|
|
int ubifs_tnc_end_commit(struct ubifs_info *c);
|
|
|
|
/* shrinker.c */
|
|
int ubifs_shrinker(int nr_to_scan, gfp_t gfp_mask);
|
|
|
|
/* commit.c */
|
|
int ubifs_bg_thread(void *info);
|
|
void ubifs_commit_required(struct ubifs_info *c);
|
|
void ubifs_request_bg_commit(struct ubifs_info *c);
|
|
int ubifs_run_commit(struct ubifs_info *c);
|
|
void ubifs_recovery_commit(struct ubifs_info *c);
|
|
int ubifs_gc_should_commit(struct ubifs_info *c);
|
|
void ubifs_wait_for_commit(struct ubifs_info *c);
|
|
|
|
/* master.c */
|
|
int ubifs_read_master(struct ubifs_info *c);
|
|
int ubifs_write_master(struct ubifs_info *c);
|
|
|
|
/* sb.c */
|
|
int ubifs_read_superblock(struct ubifs_info *c);
|
|
struct ubifs_sb_node *ubifs_read_sb_node(struct ubifs_info *c);
|
|
int ubifs_write_sb_node(struct ubifs_info *c, struct ubifs_sb_node *sup);
|
|
|
|
/* replay.c */
|
|
int ubifs_validate_entry(struct ubifs_info *c,
|
|
const struct ubifs_dent_node *dent);
|
|
int ubifs_replay_journal(struct ubifs_info *c);
|
|
|
|
/* gc.c */
|
|
int ubifs_garbage_collect(struct ubifs_info *c, int anyway);
|
|
int ubifs_gc_start_commit(struct ubifs_info *c);
|
|
int ubifs_gc_end_commit(struct ubifs_info *c);
|
|
void ubifs_destroy_idx_gc(struct ubifs_info *c);
|
|
int ubifs_get_idx_gc_leb(struct ubifs_info *c);
|
|
int ubifs_garbage_collect_leb(struct ubifs_info *c, struct ubifs_lprops *lp);
|
|
|
|
/* orphan.c */
|
|
int ubifs_add_orphan(struct ubifs_info *c, ino_t inum);
|
|
void ubifs_delete_orphan(struct ubifs_info *c, ino_t inum);
|
|
int ubifs_orphan_start_commit(struct ubifs_info *c);
|
|
int ubifs_orphan_end_commit(struct ubifs_info *c);
|
|
int ubifs_mount_orphans(struct ubifs_info *c, int unclean, int read_only);
|
|
int ubifs_clear_orphans(struct ubifs_info *c);
|
|
|
|
/* lpt.c */
|
|
int ubifs_calc_lpt_geom(struct ubifs_info *c);
|
|
int ubifs_create_dflt_lpt(struct ubifs_info *c, int *main_lebs, int lpt_first,
|
|
int *lpt_lebs, int *big_lpt);
|
|
int ubifs_lpt_init(struct ubifs_info *c, int rd, int wr);
|
|
struct ubifs_lprops *ubifs_lpt_lookup(struct ubifs_info *c, int lnum);
|
|
struct ubifs_lprops *ubifs_lpt_lookup_dirty(struct ubifs_info *c, int lnum);
|
|
int ubifs_lpt_scan_nolock(struct ubifs_info *c, int start_lnum, int end_lnum,
|
|
ubifs_lpt_scan_callback scan_cb, void *data);
|
|
|
|
/* Shared by lpt.c for lpt_commit.c */
|
|
void ubifs_pack_lsave(struct ubifs_info *c, void *buf, int *lsave);
|
|
void ubifs_pack_ltab(struct ubifs_info *c, void *buf,
|
|
struct ubifs_lpt_lprops *ltab);
|
|
void ubifs_pack_pnode(struct ubifs_info *c, void *buf,
|
|
struct ubifs_pnode *pnode);
|
|
void ubifs_pack_nnode(struct ubifs_info *c, void *buf,
|
|
struct ubifs_nnode *nnode);
|
|
struct ubifs_pnode *ubifs_get_pnode(struct ubifs_info *c,
|
|
struct ubifs_nnode *parent, int iip);
|
|
struct ubifs_nnode *ubifs_get_nnode(struct ubifs_info *c,
|
|
struct ubifs_nnode *parent, int iip);
|
|
int ubifs_read_nnode(struct ubifs_info *c, struct ubifs_nnode *parent, int iip);
|
|
void ubifs_add_lpt_dirt(struct ubifs_info *c, int lnum, int dirty);
|
|
void ubifs_add_nnode_dirt(struct ubifs_info *c, struct ubifs_nnode *nnode);
|
|
uint32_t ubifs_unpack_bits(uint8_t **addr, int *pos, int nrbits);
|
|
struct ubifs_nnode *ubifs_first_nnode(struct ubifs_info *c, int *hght);
|
|
/* Needed only in debugging code in lpt_commit.c */
|
|
int ubifs_unpack_nnode(const struct ubifs_info *c, void *buf,
|
|
struct ubifs_nnode *nnode);
|
|
|
|
/* lpt_commit.c */
|
|
int ubifs_lpt_start_commit(struct ubifs_info *c);
|
|
int ubifs_lpt_end_commit(struct ubifs_info *c);
|
|
int ubifs_lpt_post_commit(struct ubifs_info *c);
|
|
void ubifs_lpt_free(struct ubifs_info *c, int wr_only);
|
|
|
|
/* lprops.c */
|
|
const struct ubifs_lprops *ubifs_change_lp(struct ubifs_info *c,
|
|
const struct ubifs_lprops *lp,
|
|
int free, int dirty, int flags,
|
|
int idx_gc_cnt);
|
|
void ubifs_get_lp_stats(struct ubifs_info *c, struct ubifs_lp_stats *lst);
|
|
void ubifs_add_to_cat(struct ubifs_info *c, struct ubifs_lprops *lprops,
|
|
int cat);
|
|
void ubifs_replace_cat(struct ubifs_info *c, struct ubifs_lprops *old_lprops,
|
|
struct ubifs_lprops *new_lprops);
|
|
void ubifs_ensure_cat(struct ubifs_info *c, struct ubifs_lprops *lprops);
|
|
int ubifs_categorize_lprops(const struct ubifs_info *c,
|
|
const struct ubifs_lprops *lprops);
|
|
int ubifs_change_one_lp(struct ubifs_info *c, int lnum, int free, int dirty,
|
|
int flags_set, int flags_clean, int idx_gc_cnt);
|
|
int ubifs_update_one_lp(struct ubifs_info *c, int lnum, int free, int dirty,
|
|
int flags_set, int flags_clean);
|
|
int ubifs_read_one_lp(struct ubifs_info *c, int lnum, struct ubifs_lprops *lp);
|
|
const struct ubifs_lprops *ubifs_fast_find_free(struct ubifs_info *c);
|
|
const struct ubifs_lprops *ubifs_fast_find_empty(struct ubifs_info *c);
|
|
const struct ubifs_lprops *ubifs_fast_find_freeable(struct ubifs_info *c);
|
|
const struct ubifs_lprops *ubifs_fast_find_frdi_idx(struct ubifs_info *c);
|
|
|
|
/* file.c */
|
|
int ubifs_fsync(struct file *file, struct dentry *dentry, int datasync);
|
|
int ubifs_setattr(struct dentry *dentry, struct iattr *attr);
|
|
|
|
/* dir.c */
|
|
struct inode *ubifs_new_inode(struct ubifs_info *c, const struct inode *dir,
|
|
int mode);
|
|
int ubifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
|
|
struct kstat *stat);
|
|
|
|
/* xattr.c */
|
|
int ubifs_setxattr(struct dentry *dentry, const char *name,
|
|
const void *value, size_t size, int flags);
|
|
ssize_t ubifs_getxattr(struct dentry *dentry, const char *name, void *buf,
|
|
size_t size);
|
|
ssize_t ubifs_listxattr(struct dentry *dentry, char *buffer, size_t size);
|
|
int ubifs_removexattr(struct dentry *dentry, const char *name);
|
|
|
|
/* super.c */
|
|
struct inode *ubifs_iget(struct super_block *sb, unsigned long inum);
|
|
int ubifs_iput(struct inode *inode);
|
|
|
|
/* recovery.c */
|
|
int ubifs_recover_master_node(struct ubifs_info *c);
|
|
int ubifs_write_rcvrd_mst_node(struct ubifs_info *c);
|
|
struct ubifs_scan_leb *ubifs_recover_leb(struct ubifs_info *c, int lnum,
|
|
int offs, void *sbuf, int grouped);
|
|
struct ubifs_scan_leb *ubifs_recover_log_leb(struct ubifs_info *c, int lnum,
|
|
int offs, void *sbuf);
|
|
int ubifs_recover_inl_heads(const struct ubifs_info *c, void *sbuf);
|
|
int ubifs_clean_lebs(const struct ubifs_info *c, void *sbuf);
|
|
int ubifs_rcvry_gc_commit(struct ubifs_info *c);
|
|
int ubifs_recover_size_accum(struct ubifs_info *c, union ubifs_key *key,
|
|
int deletion, loff_t new_size);
|
|
int ubifs_recover_size(struct ubifs_info *c);
|
|
void ubifs_destroy_size_tree(struct ubifs_info *c);
|
|
|
|
/* ioctl.c */
|
|
long ubifs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
|
|
void ubifs_set_inode_flags(struct inode *inode);
|
|
#ifdef CONFIG_COMPAT
|
|
long ubifs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
|
|
#endif
|
|
|
|
/* compressor.c */
|
|
int __init ubifs_compressors_init(void);
|
|
void __exit ubifs_compressors_exit(void);
|
|
void ubifs_compress(const void *in_buf, int in_len, void *out_buf, int *out_len,
|
|
int *compr_type);
|
|
int ubifs_decompress(const void *buf, int len, void *out, int *out_len,
|
|
int compr_type);
|
|
|
|
#include "debug.h"
|
|
#include "misc.h"
|
|
#include "key.h"
|
|
|
|
/* todo: Move these to a common U-Boot header */
|
|
int lzo1x_decompress_safe(const unsigned char *in, size_t in_len,
|
|
unsigned char *out, size_t *out_len);
|
|
#endif /* !__UBIFS_H__ */
|