+/* SPDX-License-Identifier: GPL-2.0+ */
/*
* This file is part of UBIFS.
*
* (C) Copyright 2008-2009
* Stefan Roese, DENX Software Engineering, sr@denx.de.
*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
* Authors: Artem Bityutskiy (Битюцкий Артём)
* Adrian Hunter
*/
#ifndef __UBIFS_H__
#define __UBIFS_H__
-#if 0 /* Enable for debugging output */
-#define CONFIG_UBIFS_FS_DEBUG
-#define CONFIG_UBIFS_FS_DEBUG_MSG_LVL 3
-#endif
-
+#ifndef __UBOOT__
+#include <asm/div64.h>
+#include <linux/statfs.h>
+#include <linux/fs.h>
+#include <linux/err.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/spinlock.h>
+#include <linux/mutex.h>
+#include <linux/rwsem.h>
+#include <linux/mtd/ubi.h>
+#include <linux/pagemap.h>
+#include <linux/backing-dev.h>
+#include <linux/security.h>
+#include "ubifs-media.h"
+#else
+#include <asm/atomic.h>
+#include <asm-generic/atomic-long.h>
#include <ubi_uboot.h>
+#include <ubifs_uboot.h>
+
#include <linux/ctype.h>
#include <linux/time.h>
#include <linux/math64.h>
void iput(struct inode *inode);
-/*
- * The atomic operations are used for budgeting etc which is not
- * needed for the read-only U-Boot implementation:
- */
-#define atomic_long_inc(a)
-#define atomic_long_dec(a)
-#define atomic_long_sub(a, b)
-
/* linux/include/time.h */
+#define NSEC_PER_SEC 1000000000L
+#define get_seconds() 0
+#define CURRENT_TIME_SEC ((struct timespec) { get_seconds(), 0 })
struct timespec {
time_t tv_sec; /* seconds */
long tv_nsec; /* nanoseconds */
};
+static struct timespec current_fs_time(struct super_block *sb)
+{
+ struct timespec now;
+ now.tv_sec = 0;
+ now.tv_nsec = 0;
+ return now;
+};
+
/* linux/include/dcache.h */
/*
struct qstr {
unsigned int hash;
unsigned int len;
+#ifndef __UBOOT__
const char *name;
+#else
+ char *name;
+#endif
+};
+
+/* include/linux/fs.h */
+
+/* Possible states of 'frozen' field */
+enum {
+ SB_UNFROZEN = 0, /* FS is unfrozen */
+ SB_FREEZE_WRITE = 1, /* Writes, dir ops, ioctls frozen */
+ SB_FREEZE_PAGEFAULT = 2, /* Page faults stopped as well */
+ SB_FREEZE_FS = 3, /* For internal FS use (e.g. to stop
+ * internal threads if needed) */
+ SB_FREEZE_COMPLETE = 4, /* ->freeze_fs finished successfully */
};
+#define SB_FREEZE_LEVELS (SB_FREEZE_COMPLETE - 1)
+
+struct sb_writers {
+#ifndef __UBOOT__
+ /* Counters for counting writers at each level */
+ struct percpu_counter counter[SB_FREEZE_LEVELS];
+#endif
+ wait_queue_head_t wait; /* queue for waiting for
+ writers / faults to finish */
+ int frozen; /* Is sb frozen? */
+ wait_queue_head_t wait_unfrozen; /* queue for waiting for
+ sb to be thawed */
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+ struct lockdep_map lock_map[SB_FREEZE_LEVELS];
+#endif
+};
+
+struct address_space {
+ struct inode *host; /* owner: inode, block_device */
+#ifndef __UBOOT__
+ struct radix_tree_root page_tree; /* radix tree of all pages */
+#endif
+ spinlock_t tree_lock; /* and lock protecting it */
+ unsigned int i_mmap_writable;/* count VM_SHARED mappings */
+ struct rb_root i_mmap; /* tree of private and shared mappings */
+ struct list_head i_mmap_nonlinear;/*list VM_NONLINEAR mappings */
+ struct mutex i_mmap_mutex; /* protect tree, count, list */
+ /* Protected by tree_lock together with the radix tree */
+ unsigned long nrpages; /* number of total pages */
+ pgoff_t writeback_index;/* writeback starts here */
+ const struct address_space_operations *a_ops; /* methods */
+ unsigned long flags; /* error bits/gfp mask */
+#ifndef __UBOOT__
+ struct backing_dev_info *backing_dev_info; /* device readahead, etc */
+#endif
+ spinlock_t private_lock; /* for use by the address_space */
+ struct list_head private_list; /* ditto */
+ void *private_data; /* ditto */
+} __attribute__((aligned(sizeof(long))));
+
+/*
+ * Keep mostly read-only and often accessed (especially for
+ * the RCU path lookup and 'stat' data) fields at the beginning
+ * of the 'struct inode'
+ */
struct inode {
- struct hlist_node i_hash;
- struct list_head i_list;
- struct list_head i_sb_list;
- struct list_head i_dentry;
+ umode_t i_mode;
+ unsigned short i_opflags;
+ kuid_t i_uid;
+ kgid_t i_gid;
+ unsigned int i_flags;
+
+#ifdef CONFIG_FS_POSIX_ACL
+ struct posix_acl *i_acl;
+ struct posix_acl *i_default_acl;
+#endif
+
+ const struct inode_operations *i_op;
+ struct super_block *i_sb;
+ struct address_space *i_mapping;
+
+#ifdef CONFIG_SECURITY
+ void *i_security;
+#endif
+
+ /* Stat data, not accessed from path walking */
unsigned long i_ino;
- unsigned int i_nlink;
- uid_t i_uid;
- gid_t i_gid;
+ /*
+ * Filesystems may only read i_nlink directly. They shall use the
+ * following functions for modification:
+ *
+ * (set|clear|inc|drop)_nlink
+ * inode_(inc|dec)_link_count
+ */
+ union {
+ const unsigned int i_nlink;
+ unsigned int __i_nlink;
+ };
dev_t i_rdev;
- u64 i_version;
loff_t i_size;
-#ifdef __NEED_I_SIZE_ORDERED
- seqcount_t i_size_seqcount;
-#endif
struct timespec i_atime;
struct timespec i_mtime;
struct timespec i_ctime;
- unsigned int i_blkbits;
- unsigned short i_bytes;
- umode_t i_mode;
spinlock_t i_lock; /* i_blocks, i_bytes, maybe i_size */
+ unsigned short i_bytes;
+ unsigned int i_blkbits;
+ blkcnt_t i_blocks;
+
+#ifdef __NEED_I_SIZE_ORDERED
+ seqcount_t i_size_seqcount;
+#endif
+
+ /* Misc */
+ unsigned long i_state;
struct mutex i_mutex;
- struct rw_semaphore i_alloc_sem;
- const struct inode_operations *i_op;
+
+ unsigned long dirtied_when; /* jiffies of first dirtying */
+
+ struct hlist_node i_hash;
+ struct list_head i_wb_list; /* backing dev IO list */
+ struct list_head i_lru; /* inode LRU list */
+ struct list_head i_sb_list;
+ union {
+ struct hlist_head i_dentry;
+ struct rcu_head i_rcu;
+ };
+ u64 i_version;
+ atomic_t i_count;
+ atomic_t i_dio_count;
+ atomic_t i_writecount;
const struct file_operations *i_fop; /* former ->i_op->default_file_ops */
- struct super_block *i_sb;
struct file_lock *i_flock;
+ struct address_space i_data;
#ifdef CONFIG_QUOTA
struct dquot *i_dquot[MAXQUOTAS];
#endif
struct list_head i_devices;
- int i_cindex;
+ union {
+ struct pipe_inode_info *i_pipe;
+ struct block_device *i_bdev;
+ struct cdev *i_cdev;
+ };
__u32 i_generation;
-#ifdef CONFIG_DNOTIFY
- unsigned long i_dnotify_mask; /* Directory notify events */
- struct dnotify_struct *i_dnotify; /* for directory notifications */
+#ifdef CONFIG_FSNOTIFY
+ __u32 i_fsnotify_mask; /* all events this inode cares about */
+ struct hlist_head i_fsnotify_marks;
#endif
-#ifdef CONFIG_INOTIFY
- struct list_head inotify_watches; /* watches on this inode */
- struct mutex inotify_mutex; /* protects the watches list */
+#ifdef CONFIG_IMA
+ atomic_t i_readcount; /* struct files open RO */
#endif
+ void *i_private; /* fs or device private pointer */
+};
- unsigned long i_state;
- unsigned long dirtied_when; /* jiffies of first dirtying */
-
- unsigned int i_flags;
-
-#ifdef CONFIG_SECURITY
- void *i_security;
+struct super_operations {
+ struct inode *(*alloc_inode)(struct super_block *sb);
+ void (*destroy_inode)(struct inode *);
+
+ void (*dirty_inode) (struct inode *, int flags);
+ int (*write_inode) (struct inode *, struct writeback_control *wbc);
+ int (*drop_inode) (struct inode *);
+ void (*evict_inode) (struct inode *);
+ void (*put_super) (struct super_block *);
+ int (*sync_fs)(struct super_block *sb, int wait);
+ int (*freeze_fs) (struct super_block *);
+ int (*unfreeze_fs) (struct super_block *);
+#ifndef __UBOOT__
+ int (*statfs) (struct dentry *, struct kstatfs *);
#endif
- void *i_private; /* fs or device private pointer */
+ int (*remount_fs) (struct super_block *, int *, char *);
+ void (*umount_begin) (struct super_block *);
+
+#ifndef __UBOOT__
+ int (*show_options)(struct seq_file *, struct dentry *);
+ int (*show_devname)(struct seq_file *, struct dentry *);
+ int (*show_path)(struct seq_file *, struct dentry *);
+ int (*show_stats)(struct seq_file *, struct dentry *);
+#endif
+#ifdef CONFIG_QUOTA
+ ssize_t (*quota_read)(struct super_block *, int, char *, size_t, loff_t);
+ ssize_t (*quota_write)(struct super_block *, int, const char *, size_t, loff_t);
+#endif
+ int (*bdev_try_to_free_page)(struct super_block*, struct page*, gfp_t);
+ long (*nr_cached_objects)(struct super_block *, int);
+ long (*free_cached_objects)(struct super_block *, long, int);
};
struct super_block {
struct list_head s_list; /* Keep this first */
dev_t s_dev; /* search index; _not_ kdev_t */
- unsigned long s_blocksize;
unsigned char s_blocksize_bits;
- unsigned char s_dirt;
- unsigned long long s_maxbytes; /* Max file size */
+ unsigned long s_blocksize;
+ loff_t s_maxbytes; /* Max file size */
struct file_system_type *s_type;
const struct super_operations *s_op;
- struct dquot_operations *dq_op;
- struct quotactl_ops *s_qcop;
+ const struct dquot_operations *dq_op;
+ const struct quotactl_ops *s_qcop;
const struct export_operations *s_export_op;
unsigned long s_flags;
unsigned long s_magic;
struct dentry *s_root;
struct rw_semaphore s_umount;
- struct mutex s_lock;
int s_count;
- int s_syncing;
- int s_need_sync_fs;
+ atomic_t s_active;
#ifdef CONFIG_SECURITY
void *s_security;
#endif
- struct xattr_handler **s_xattr;
+ const struct xattr_handler **s_xattr;
struct list_head s_inodes; /* all inodes */
- struct list_head s_dirty; /* dirty inodes */
- struct list_head s_io; /* parked for writeback */
- struct list_head s_more_io; /* parked for more writeback */
- struct hlist_head s_anon; /* anonymous dentries for (nfs) exporting */
- struct list_head s_files;
- /* s_dentry_lru and s_nr_dentry_unused are protected by dcache_lock */
- struct list_head s_dentry_lru; /* unused dentry lru */
- int s_nr_dentry_unused; /* # of dentry on lru */
-
+#ifndef __UBOOT__
+ struct hlist_bl_head s_anon; /* anonymous dentries for (nfs) exporting */
+#endif
+ struct list_head s_mounts; /* list of mounts; _not_ for fs use */
struct block_device *s_bdev;
+#ifndef __UBOOT__
+ struct backing_dev_info *s_bdi;
+#endif
struct mtd_info *s_mtd;
- struct list_head s_instances;
+#ifndef __UBOOT__
+ struct hlist_node s_instances;
+ struct quota_info s_dquot; /* Diskquota specific options */
+#endif
- int s_frozen;
- wait_queue_head_t s_wait_unfrozen;
+ struct sb_writers s_writers;
char s_id[32]; /* Informational name */
+ u8 s_uuid[16]; /* UUID */
void *s_fs_info; /* Filesystem private info */
+ unsigned int s_max_links;
+#ifndef __UBOOT__
+ fmode_t s_mode;
+#endif
+
+ /* Granularity of c/m/atime in ns.
+ Cannot be worse than a second */
+ u32 s_time_gran;
/*
* The next field is for VFS *only*. No filesystems have any business
*/
struct mutex s_vfs_rename_mutex; /* Kludge */
- /* Granularity of c/m/atime in ns.
- Cannot be worse than a second */
- u32 s_time_gran;
-
/*
* Filesystem subtype. If non-empty the filesystem type field
* in /proc/mounts will be "type.subtype"
*/
char *s_subtype;
+#ifndef __UBOOT__
/*
* Saved mount options for lazy filesystems using
* generic_show_options()
*/
- char *s_options;
+ char __rcu *s_options;
+#endif
+ const struct dentry_operations *s_d_op; /* default d_op for dentries */
+
+ /*
+ * Saved pool identifier for cleancache (-1 means none)
+ */
+ int cleancache_poolid;
+
+#ifndef __UBOOT__
+ struct shrinker s_shrink; /* per-sb shrinker handle */
+#endif
+
+ /* Number of inodes with nlink == 0 but still referenced */
+ atomic_long_t s_remove_count;
+
+ /* Being remounted read-only */
+ int s_readonly_remount;
+
+ /* AIO completions deferred from interrupt context */
+ struct workqueue_struct *s_dio_done_wq;
+
+#ifndef __UBOOT__
+ /*
+ * Keep the lru lists last in the structure so they always sit on their
+ * own individual cachelines.
+ */
+ struct list_lru s_dentry_lru ____cacheline_aligned_in_smp;
+ struct list_lru s_inode_lru ____cacheline_aligned_in_smp;
+#endif
+ struct rcu_head rcu;
};
struct file_system_type {
const char *name;
int fs_flags;
- int (*get_sb) (struct file_system_type *, int,
- const char *, void *, struct vfsmount *);
+#define FS_REQUIRES_DEV 1
+#define FS_BINARY_MOUNTDATA 2
+#define FS_HAS_SUBTYPE 4
+#define FS_USERNS_MOUNT 8 /* Can be mounted by userns root */
+#define FS_USERNS_DEV_MOUNT 16 /* A userns mount does not imply MNT_NODEV */
+#define FS_RENAME_DOES_D_MOVE 32768 /* FS will handle d_move() during rename() internally. */
+ struct dentry *(*mount) (struct file_system_type *, int,
+ const char *, void *);
void (*kill_sb) (struct super_block *);
struct module *owner;
struct file_system_type * next;
- struct list_head fs_supers;
+ struct hlist_head fs_supers;
+
+#ifndef __UBOOT__
+ struct lock_class_key s_lock_key;
+ struct lock_class_key s_umount_key;
+ struct lock_class_key s_vfs_rename_key;
+ struct lock_class_key s_writers_key[SB_FREEZE_LEVELS];
+
+ struct lock_class_key i_lock_key;
+ struct lock_class_key i_mutex_key;
+ struct lock_class_key i_mutex_dir_key;
+#endif
};
+/* include/linux/mount.h */
struct vfsmount {
- struct list_head mnt_hash;
- struct vfsmount *mnt_parent; /* fs we are mounted on */
- struct dentry *mnt_mountpoint; /* dentry of mountpoint */
struct dentry *mnt_root; /* root of the mounted tree */
struct super_block *mnt_sb; /* pointer to superblock */
- struct list_head mnt_mounts; /* list of children, anchored here */
- struct list_head mnt_child; /* and going through their mnt_child */
int mnt_flags;
- /* 4 bytes hole on 64bits arches */
- const char *mnt_devname; /* Name of device e.g. /dev/dsk/hda1 */
- struct list_head mnt_list;
- struct list_head mnt_expire; /* link in fs-specific expiry list */
- struct list_head mnt_share; /* circular list of shared mounts */
- struct list_head mnt_slave_list;/* list of slave mounts */
- struct list_head mnt_slave; /* slave list entry */
- struct vfsmount *mnt_master; /* slave is on master->mnt_slave_list */
- struct mnt_namespace *mnt_ns; /* containing namespace */
- int mnt_id; /* mount identifier */
- int mnt_group_id; /* peer group identifier */
- /*
- * We put mnt_count & mnt_expiry_mark at the end of struct vfsmount
- * to let these frequently modified fields in a separate cache line
- * (so that reads of mnt_flags wont ping-pong on SMP machines)
- */
- int mnt_expiry_mark; /* true if marked for expiry */
- int mnt_pinned;
- int mnt_ghosts;
- /*
- * This value is not stable unless all of the mnt_writers[] spinlocks
- * are held, and all mnt_writer[]s on this mount have 0 as their ->count
- */
};
struct path {
#define MAX_LFS_FILESIZE 0x7fffffffffffffffUL
#endif
-#define INT_MAX ((int)(~0U>>1))
-#define INT_MIN (-INT_MAX - 1)
-#define LLONG_MAX ((long long)(~0ULL>>1))
-
/*
* These are the fs-independent mount-flags: up to 32 flags are supported
*/
/* debug.c */
-#define DEFINE_SPINLOCK(...)
#define module_param_named(...)
/* misc.h */
#define mutex_lock_nested(...)
#define mutex_unlock_nested(...)
-#define mutex_is_locked(...) 0
+#define mutex_is_locked(...) 1
+#endif
/* Version of this UBIFS implementation */
#define UBIFS_VERSION 1
/* Normal UBIFS messages */
#ifdef CONFIG_UBIFS_SILENCE_MSG
-#define ubifs_msg(fmt, ...)
+#define ubifs_msg(c, fmt, ...)
#else
-#define ubifs_msg(fmt, ...) \
- printk(KERN_NOTICE "UBIFS: " fmt "\n", ##__VA_ARGS__)
+#define ubifs_msg(c, fmt, ...) \
+ pr_notice("UBIFS (ubi%d:%d): " fmt "\n", \
+ (c)->vi.ubi_num, (c)->vi.vol_id, ##__VA_ARGS__)
#endif
/* UBIFS error messages */
-#define ubifs_err(fmt, ...) \
- printk(KERN_ERR "UBIFS error (pid %d): %s: " fmt "\n", 0, \
+#ifndef __UBOOT__
+#define ubifs_err(c, fmt, ...) \
+ pr_err("UBIFS error (ubi%d:%d pid %d): %s: " fmt "\n", \
+ (c)->vi.ubi_num, (c)->vi.vol_id, current->pid, \
+ __func__, ##__VA_ARGS__)
+/* UBIFS warning messages */
+#define ubifs_warn(c, fmt, ...) \
+ pr_warn("UBIFS warning (ubi%d:%d pid %d): %s: " fmt "\n", \
+ (c)->vi.ubi_num, (c)->vi.vol_id, current->pid, \
+ __func__, ##__VA_ARGS__)
+#else
+#define ubifs_err(c, fmt, ...) \
+ pr_err("UBIFS error (ubi%d:%d pid %d): %s: " fmt "\n", \
+ (c)->vi.ubi_num, (c)->vi.vol_id, 0, \
__func__, ##__VA_ARGS__)
/* UBIFS warning messages */
-#define ubifs_warn(fmt, ...) \
- printk(KERN_WARNING "UBIFS warning (pid %d): %s: " fmt "\n", \
- 0, __func__, ##__VA_ARGS__)
+#define ubifs_warn(c, fmt, ...) \
+ pr_warn("UBIFS warning (ubi%d:%d pid %d): %s: " fmt "\n", \
+ (c)->vi.ubi_num, (c)->vi.vol_id, 0, \
+ __func__, ##__VA_ARGS__)
+
+#endif
+
+/*
+ * A variant of 'ubifs_err()' which takes the UBIFS file-sytem description
+ * object as an argument.
+ */
+#define ubifs_errc(c, fmt, ...) \
+ do { \
+ if (!(c)->probing) \
+ ubifs_err(c, fmt, ##__VA_ARGS__); \
+ } while (0)
/* UBIFS file system VFS magic number */
#define UBIFS_SUPER_MAGIC 0x24051905
#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
*/
#define BGT_NAME_PATTERN "ubifs_bgt%d_%d"
-/* Default write-buffer synchronization timeout (5 secs) */
-#define DEFAULT_WBUF_TIMEOUT (5 * HZ)
+/* Write-buffer synchronization timeout interval in seconds */
+#define WBUF_TIMEOUT_SOFTLIMIT 3
+#define WBUF_TIMEOUT_HARDLIMIT 5
/* 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
+/* Shorter names for journal head numbers for internal usage */
+#define GCHD UBIFS_GC_HEAD
+#define BASEHD UBIFS_BASE_HEAD
+#define DATAHD UBIFS_DATA_HEAD
/* 'No change' value for 'ubifs_change_lp()' */
#define LPROPS_NC 0x80000001
* 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.
+ *
+ * But otherwise, out of the journal reply scope, the truncation keys are
+ * invalid.
*/
-#define UBIFS_TRUN_KEY UBIFS_KEY_TYPES_CNT
+#define UBIFS_TRUN_KEY UBIFS_KEY_TYPES_CNT
+#define UBIFS_INVALID_KEY UBIFS_KEY_TYPES_CNT
/*
* How much a directory entry/extended attribute entry adds to the parent/host
*/
#define WORST_COMPR_FACTOR 2
+/*
+ * How much memory is needed for a buffer where we compress a data node.
+ */
+#define COMPRESSED_DATA_NODE_BUF_SZ \
+ (UBIFS_DATA_NODE_SZ + UBIFS_BLOCK_SIZE * WORST_COMPR_FACTOR)
+
/* Maximum expected tree height for use by bottom_up_buf */
#define BOTTOM_UP_HEIGHT 64
* 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
+ * so it can (and must) be freed when the commit is finished
+ * COW_CNODE: cnode is being committed and must be copied before writing
*/
enum {
DIRTY_CNODE = 0,
- COW_CNODE = 1,
- OBSOLETE_CNODE = 2,
+ OBSOLETE_CNODE = 1,
+ COW_CNODE = 2,
};
/*
/* 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];
+ uint8_t u8[UBIFS_SK_LEN];
+ uint32_t u32[UBIFS_SK_LEN/4];
+ uint64_t u64[UBIFS_SK_LEN/8];
+ __le32 j32[UBIFS_SK_LEN/4];
};
/**
* @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 nodes_cnt;
struct list_head nodes;
int endpt;
- int ecc;
void *buf;
};
* 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
+ * cannot call 'truncate_setsize()' 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 {
* @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)
+ * @size: write-buffer size (in [@c->min_io_size, @c->max_write_size] range)
* @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
+ * @softlimit: soft write-buffer timeout interval
+ * @delta: hard and soft timeouts delta (the timer expire interval is @softlimit
+ * and @softlimit + @delta)
* @timer: write-buffer timer
- * @timeout: timer expire interval in jiffies
- * @need_sync: it is set if its timer expired and needs sync
+ * @no_timer: non-zero if this write-buffer does not have a timer
+ * @need_sync: non-zero if the timer expired and the wbuf needs sync'ing
* @next_ino: points to the next position of the following inode number
* @inodes: stores the inode numbers of the nodes which are in wbuf
*
int offs;
int avail;
int used;
- int dtype;
+ int size;
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;
+// ktime_t softlimit;
+// unsigned long long delta;
+// struct hrtimer timer;
+ unsigned int no_timer:1;
+ unsigned int need_sync:1;
int next_ino;
ino_t *inodes;
};
* struct ubifs_jhead - journal head.
* @wbuf: head's write-buffer
* @buds_list: list of bud LEBs belonging to this journal head
+ * @grouped: non-zero if UBIFS groups nodes when writing 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;
+ unsigned int grouped:1;
};
/**
* @offs: offset of the corresponding indexing node
* @len: length of the corresponding indexing node
* @zbranch: array of znode branches (@c->fanout elements)
+ *
+ * Note! The @lnum, @offs, and @len fields are not really needed - we have them
+ * only for internal consistency check. They could be removed to save some RAM.
*/
struct ubifs_znode {
struct ubifs_znode *parent;
int child_cnt;
int iip;
int alt;
-#ifdef CONFIG_UBIFS_FS_DEBUG
- int lnum, offs, len;
-#endif
+ int lnum;
+ int offs;
+ int len;
struct ubifs_zbranch zbranch[];
};
*/
struct ubifs_compressor {
int compr_type;
- char *name;
- char *capi_name;
+ struct crypto_comp *cc;
+ struct mutex *comp_mutex;
+ struct mutex *decomp_mutex;
+ const char *name;
+ const char *capi_name;
+#ifdef __UBOOT__
int (*decompress)(const unsigned char *in, size_t in_len,
unsigned char *out, size_t *out_len);
+#endif
};
/**
* @dnext: next orphan to delete
* @inum: inode number
* @new: %1 => added since the last commit, otherwise %0
+ * @cmt: %1 => commit pending, otherwise %0
+ * @del: %1 => delete pending, otherwise %0
*/
struct ubifs_orphan {
struct rb_node rb;
struct ubifs_orphan *cnext;
struct ubifs_orphan *dnext;
ino_t inum;
- int new;
+ unsigned new:1;
+ unsigned cmt:1;
+ unsigned del:1;
};
/**
* 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)
+ * @bulk_read: enable/disable bulk-reads (%0 default, %1 disable, %2 enable)
* @chk_data_crc: enable/disable CRC data checking when reading data nodes
- * (%0 default, %1 disabe, %2 enable)
+ * (%0 default, %1 disable, %2 enable)
* @override_compr: override default compressor (%0 - do not override and use
* superblock compressor, %1 - override and use compressor
* specified in @compr_type)
unsigned int compr_type:2;
};
+/**
+ * struct ubifs_budg_info - UBIFS budgeting information.
+ * @idx_growth: amount of bytes budgeted for index growth
+ * @data_growth: amount of bytes budgeted for cached data
+ * @dd_growth: amount of bytes budgeted for cached data that will make
+ * other data dirty
+ * @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
+ * @old_idx_sz: size of index on flash
+ * @min_idx_lebs: minimum number of LEBs required for the index
+ * @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 (constant, never changed after mount)
+ * @inode_budget: budget for an inode (constant, never changed after mount)
+ * @dent_budget: budget for a directory entry (constant, never changed after
+ * mount)
+ */
+struct ubifs_budg_info {
+ long long idx_growth;
+ long long data_growth;
+ long long dd_growth;
+ long long uncommitted_idx;
+ unsigned long long old_idx_sz;
+ int min_idx_lebs;
+ unsigned int nospace:1;
+ unsigned int nospace_rp:1;
+ int page_budget;
+ int inode_budget;
+ int dent_budget;
+};
+
struct ubifs_debug_info;
/**
* @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
+ * @space_fixup: flag indicating that free space in LEBs needs to be cleaned up
* @no_chk_data_crc: do not check CRCs when reading data nodes (except during
* recovery)
* @bulk_read: enable bulk-reads
*
* @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
*
+ * @write_reserve_mutex: protects @write_reserve_buf
+ * @write_reserve_buf: on the write path we allocate memory, which might
+ * sometimes be unavailable, in which case we use this
+ * write reserve buffer
+ *
* @log_lebs: number of logical eraseblocks in the log
* @log_bytes: log size in bytes
* @log_last: last LEB of the log
*
* @min_io_size: minimal input/output unit size
* @min_io_shift: number of bits in @min_io_size minus one
+ * @max_write_size: maximum amount of bytes the underlying flash can write at a
+ * time (MTD write buffer size)
+ * @max_write_shift: number of bits in @max_write_size minus one
* @leb_size: logical eraseblock size in bytes
+ * @leb_start: starting offset of logical eraseblocks within physical
+ * eraseblocks
* @half_leb_size: half LEB size
+ * @idx_leb_size: how many bytes of an LEB are effectively available when it is
+ * used to store indexing nodes (@leb_size - @max_idx_node_sz)
* @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
+ * @ro_mount: the file-system was mounted as read-only
+ * @ro_error: UBIFS switched to R/O mode because an error happened
*
* @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
+ * @space_lock: protects @bi and @lst
+ * @lst: lprops statistics
+ * @bi: budgeting information
* @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
+ * 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
* 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_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
+ * @in_a_category_cnt: count of lprops which are in a certain category, which
+ * basically meants that they were loaded from the flash
*
* @ltab_lnum: LEB number of LPT's own lprops table
* @ltab_offs: offset of LPT's own lprops table
* @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
+ * @empty: %1 if the UBI device is empty
+ * @need_recovery: %1 if the file-system needs recovery
+ * @replaying: %1 during journal replay
+ * @mounting: %1 while mounting
+ * @probing: %1 while attempting to mount if MS_SILENT mount flag is set
+ * @remounting_rw: %1 while re-mounting from R/O mode to R/W mode
* @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
+ * @unclean_leb_list: LEBs to recover when re-mounting R/O mounted FS to R/W
+ * mode
+ * @rcvrd_mst_node: recovered master node to write when re-mounting R/O mounted
+ * FS to R/W mode
* @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;
+#ifndef __UBOOT__
+ struct backing_dev_info bdi;
+#endif
ino_t highest_inum;
unsigned long long max_sqnum;
wait_queue_head_t cmt_wq;
unsigned int big_lpt:1;
+ unsigned int space_fixup:1;
unsigned int no_chk_data_crc:1;
unsigned int bulk_read:1;
unsigned int default_compr:2;
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;
+ struct mutex write_reserve_mutex;
+ void *write_reserve_buf;
+
int log_lebs;
long long log_bytes;
int log_last;
int min_io_size;
int min_io_shift;
+ int max_write_size;
+ int max_write_shift;
int leb_size;
+ int leb_start;
int half_leb_size;
+ int idx_leb_size;
int leb_cnt;
int max_leb_cnt;
int old_leb_cnt;
- int ro_media;
+ unsigned int ro_media:1;
+ unsigned int ro_mount:1;
+ unsigned int ro_error:1;
+
+ atomic_long_t dirty_pg_cnt;
+ atomic_long_t dirty_zn_cnt;
+ atomic_long_t clean_zn_cnt;
- 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;
+ struct ubifs_budg_info bi;
+ unsigned long long calc_idx_sz;
int ref_node_alsz;
int mst_node_alsz;
struct list_head freeable_list;
struct list_head frdi_idx_list;
int freeable_cnt;
+ int in_a_category_cnt;
int ltab_lnum;
int ltab_offs;
long long rp_size;
long long report_rp_size;
- uid_t rp_uid;
- gid_t rp_gid;
+ kuid_t rp_uid;
+ kgid_t rp_gid;
/* The below fields are used only during mounting and re-mounting */
- int empty;
- struct rb_root replay_tree;
+ unsigned int empty:1;
+ unsigned int need_recovery:1;
+ unsigned int replaying:1;
+ unsigned int mounting:1;
+ unsigned int remounting_rw:1;
+ unsigned int probing:1;
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
+#ifndef __UBOOT__
struct ubifs_debug_info *dbg;
#endif
};
+extern struct list_head ubifs_infos;
extern spinlock_t ubifs_infos_lock;
+extern atomic_long_t ubifs_clean_zn_cnt;
extern struct kmem_cache *ubifs_inode_slab;
extern const struct super_operations ubifs_super_operations;
+extern const struct xattr_handler *ubifs_xattr_handlers[];
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;
/* io.c */
void ubifs_ro_mode(struct ubifs_info *c, int err);
+int ubifs_leb_read(const struct ubifs_info *c, int lnum, void *buf, int offs,
+ int len, int even_ebadmsg);
+int ubifs_leb_write(struct ubifs_info *c, int lnum, const void *buf, int offs,
+ int len);
+int ubifs_leb_change(struct ubifs_info *c, int lnum, const void *buf, int len);
+int ubifs_leb_unmap(struct ubifs_info *c, int lnum);
+int ubifs_leb_map(struct ubifs_info *c, int lnum);
+int ubifs_is_mapped(const struct ubifs_info *c, int lnum);
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_seek_nolock(struct ubifs_wbuf *wbuf, int lnum, int offs);
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 offs);
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);
/* scan.c */
struct ubifs_scan_leb *ubifs_scan(const struct ubifs_info *c, int lnum,
- int offs, void *sbuf);
+ int offs, void *sbuf, int quiet);
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);
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 ubifs_find_free_space(struct ubifs_info *c, int min_space, int *offs,
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 ubifs_tnc_start_commit(struct ubifs_info *c, struct ubifs_zbranch *zroot);
int ubifs_tnc_end_commit(struct ubifs_info *c);
+#ifndef __UBOOT__
/* shrinker.c */
-int ubifs_shrinker(int nr_to_scan, gfp_t gfp_mask);
+unsigned long ubifs_shrink_scan(struct shrinker *shrink,
+ struct shrink_control *sc);
+unsigned long ubifs_shrink_count(struct shrinker *shrink,
+ struct shrink_control *sc);
+#endif
/* commit.c */
int ubifs_bg_thread(void *info);
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);
+int ubifs_fixup_free_space(struct ubifs_info *c);
/* replay.c */
int ubifs_validate_entry(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);
+int ubifs_calc_dark(const struct ubifs_info *c, int spc);
/* file.c */
-int ubifs_fsync(struct file *file, struct dentry *dentry, int datasync);
+int ubifs_fsync(struct file *file, loff_t start, loff_t end, 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);
+ umode_t mode);
int ubifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
struct kstat *stat);
size_t size);
ssize_t ubifs_listxattr(struct dentry *dentry, char *buffer, size_t size);
int ubifs_removexattr(struct dentry *dentry, const char *name);
+int ubifs_init_security(struct inode *dentry, struct inode *inode,
+ const struct qstr *qstr);
/* super.c */
struct inode *ubifs_iget(struct super_block *sb, unsigned long inum);
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);
+ int offs, void *sbuf, int jhead);
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_recover_inl_heads(struct ubifs_info *c, void *sbuf);
+int ubifs_clean_lebs(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);
/* 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);
-
-/* these are used in cmd_ubifs.c */
-int ubifs_init(void);
-int ubifs_mount(char *vol_name);
-void ubifs_umount(struct ubifs_info *c);
-int ubifs_ls(char *dir_name);
-int ubifs_load(char *filename, u32 addr, u32 size);
+void ubifs_compressors_exit(void);
+void ubifs_compress(const struct ubifs_info *c, const void *in_buf, int in_len,
+ void *out_buf, int *out_len, int *compr_type);
+int ubifs_decompress(const struct ubifs_info *c, 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);
+#ifdef __UBOOT__
+void ubifs_umount(struct ubifs_info *c);
+#endif
#endif /* !__UBIFS_H__ */
projects / u-boot / blobdiff