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Diffstat (limited to 'fs/reiserfs/reiserfs.h')
| -rw-r--r-- | fs/reiserfs/reiserfs.h | 3419 |
1 files changed, 0 insertions, 3419 deletions
diff --git a/fs/reiserfs/reiserfs.h b/fs/reiserfs/reiserfs.h deleted file mode 100644 index 12fc20af8e17..000000000000 --- a/fs/reiserfs/reiserfs.h +++ /dev/null @@ -1,3419 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* - * Copyright 1996, 1997, 1998 Hans Reiser, see reiserfs/README for - * licensing and copyright details - */ - -#include <linux/reiserfs_fs.h> - -#include <linux/slab.h> -#include <linux/interrupt.h> -#include <linux/sched.h> -#include <linux/bug.h> -#include <linux/workqueue.h> -#include <linux/unaligned.h> -#include <linux/bitops.h> -#include <linux/proc_fs.h> -#include <linux/buffer_head.h> - -/* the 32 bit compat definitions with int argument */ -#define REISERFS_IOC32_UNPACK _IOW(0xCD, 1, int) -#define REISERFS_IOC32_GETVERSION FS_IOC32_GETVERSION -#define REISERFS_IOC32_SETVERSION FS_IOC32_SETVERSION - -struct reiserfs_journal_list; - -/* bitmasks for i_flags field in reiserfs-specific part of inode */ -typedef enum { - /* - * this says what format of key do all items (but stat data) of - * an object have. If this is set, that format is 3.6 otherwise - 3.5 - */ - i_item_key_version_mask = 0x0001, - - /* - * If this is unset, object has 3.5 stat data, otherwise, - * it has 3.6 stat data with 64bit size, 32bit nlink etc. - */ - i_stat_data_version_mask = 0x0002, - - /* file might need tail packing on close */ - i_pack_on_close_mask = 0x0004, - - /* don't pack tail of file */ - i_nopack_mask = 0x0008, - - /* - * If either of these are set, "safe link" was created for this - * file during truncate or unlink. Safe link is used to avoid - * leakage of disk space on crash with some files open, but unlinked. - */ - i_link_saved_unlink_mask = 0x0010, - i_link_saved_truncate_mask = 0x0020, - - i_has_xattr_dir = 0x0040, - i_data_log = 0x0080, -} reiserfs_inode_flags; - -struct reiserfs_inode_info { - __u32 i_key[4]; /* key is still 4 32 bit integers */ - - /* - * transient inode flags that are never stored on disk. Bitmasks - * for this field are defined above. - */ - __u32 i_flags; - - /* offset of first byte stored in direct item. */ - __u32 i_first_direct_byte; - - /* copy of persistent inode flags read from sd_attrs. */ - __u32 i_attrs; - - /* first unused block of a sequence of unused blocks */ - int i_prealloc_block; - int i_prealloc_count; /* length of that sequence */ - - /* per-transaction list of inodes which have preallocated blocks */ - struct list_head i_prealloc_list; - - /* - * new_packing_locality is created; new blocks for the contents - * of this directory should be displaced - */ - unsigned new_packing_locality:1; - - /* - * we use these for fsync or O_SYNC to decide which transaction - * needs to be committed in order for this inode to be properly - * flushed - */ - unsigned int i_trans_id; - - struct reiserfs_journal_list *i_jl; - atomic_t openers; - struct mutex tailpack; -#ifdef CONFIG_REISERFS_FS_XATTR - struct rw_semaphore i_xattr_sem; -#endif -#ifdef CONFIG_QUOTA - struct dquot __rcu *i_dquot[MAXQUOTAS]; -#endif - - struct inode vfs_inode; -}; - -typedef enum { - reiserfs_attrs_cleared = 0x00000001, -} reiserfs_super_block_flags; - -/* - * struct reiserfs_super_block accessors/mutators since this is a disk - * structure, it will always be in little endian format. - */ -#define sb_block_count(sbp) (le32_to_cpu((sbp)->s_v1.s_block_count)) -#define set_sb_block_count(sbp,v) ((sbp)->s_v1.s_block_count = cpu_to_le32(v)) -#define sb_free_blocks(sbp) (le32_to_cpu((sbp)->s_v1.s_free_blocks)) -#define set_sb_free_blocks(sbp,v) ((sbp)->s_v1.s_free_blocks = cpu_to_le32(v)) -#define sb_root_block(sbp) (le32_to_cpu((sbp)->s_v1.s_root_block)) -#define set_sb_root_block(sbp,v) ((sbp)->s_v1.s_root_block = cpu_to_le32(v)) - -#define sb_jp_journal_1st_block(sbp) \ - (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_1st_block)) -#define set_sb_jp_journal_1st_block(sbp,v) \ - ((sbp)->s_v1.s_journal.jp_journal_1st_block = cpu_to_le32(v)) -#define sb_jp_journal_dev(sbp) \ - (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_dev)) -#define set_sb_jp_journal_dev(sbp,v) \ - ((sbp)->s_v1.s_journal.jp_journal_dev = cpu_to_le32(v)) -#define sb_jp_journal_size(sbp) \ - (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_size)) -#define set_sb_jp_journal_size(sbp,v) \ - ((sbp)->s_v1.s_journal.jp_journal_size = cpu_to_le32(v)) -#define sb_jp_journal_trans_max(sbp) \ - (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_trans_max)) -#define set_sb_jp_journal_trans_max(sbp,v) \ - ((sbp)->s_v1.s_journal.jp_journal_trans_max = cpu_to_le32(v)) -#define sb_jp_journal_magic(sbp) \ - (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_magic)) -#define set_sb_jp_journal_magic(sbp,v) \ - ((sbp)->s_v1.s_journal.jp_journal_magic = cpu_to_le32(v)) -#define sb_jp_journal_max_batch(sbp) \ - (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_max_batch)) -#define set_sb_jp_journal_max_batch(sbp,v) \ - ((sbp)->s_v1.s_journal.jp_journal_max_batch = cpu_to_le32(v)) -#define sb_jp_jourmal_max_commit_age(sbp) \ - (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_max_commit_age)) -#define set_sb_jp_journal_max_commit_age(sbp,v) \ - ((sbp)->s_v1.s_journal.jp_journal_max_commit_age = cpu_to_le32(v)) - -#define sb_blocksize(sbp) (le16_to_cpu((sbp)->s_v1.s_blocksize)) -#define set_sb_blocksize(sbp,v) ((sbp)->s_v1.s_blocksize = cpu_to_le16(v)) -#define sb_oid_maxsize(sbp) (le16_to_cpu((sbp)->s_v1.s_oid_maxsize)) -#define set_sb_oid_maxsize(sbp,v) ((sbp)->s_v1.s_oid_maxsize = cpu_to_le16(v)) -#define sb_oid_cursize(sbp) (le16_to_cpu((sbp)->s_v1.s_oid_cursize)) -#define set_sb_oid_cursize(sbp,v) ((sbp)->s_v1.s_oid_cursize = cpu_to_le16(v)) -#define sb_umount_state(sbp) (le16_to_cpu((sbp)->s_v1.s_umount_state)) -#define set_sb_umount_state(sbp,v) ((sbp)->s_v1.s_umount_state = cpu_to_le16(v)) -#define sb_fs_state(sbp) (le16_to_cpu((sbp)->s_v1.s_fs_state)) -#define set_sb_fs_state(sbp,v) ((sbp)->s_v1.s_fs_state = cpu_to_le16(v)) -#define sb_hash_function_code(sbp) \ - (le32_to_cpu((sbp)->s_v1.s_hash_function_code)) -#define set_sb_hash_function_code(sbp,v) \ - ((sbp)->s_v1.s_hash_function_code = cpu_to_le32(v)) -#define sb_tree_height(sbp) (le16_to_cpu((sbp)->s_v1.s_tree_height)) -#define set_sb_tree_height(sbp,v) ((sbp)->s_v1.s_tree_height = cpu_to_le16(v)) -#define sb_bmap_nr(sbp) (le16_to_cpu((sbp)->s_v1.s_bmap_nr)) -#define set_sb_bmap_nr(sbp,v) ((sbp)->s_v1.s_bmap_nr = cpu_to_le16(v)) -#define sb_version(sbp) (le16_to_cpu((sbp)->s_v1.s_version)) -#define set_sb_version(sbp,v) ((sbp)->s_v1.s_version = cpu_to_le16(v)) - -#define sb_mnt_count(sbp) (le16_to_cpu((sbp)->s_mnt_count)) -#define set_sb_mnt_count(sbp, v) ((sbp)->s_mnt_count = cpu_to_le16(v)) - -#define sb_reserved_for_journal(sbp) \ - (le16_to_cpu((sbp)->s_v1.s_reserved_for_journal)) -#define set_sb_reserved_for_journal(sbp,v) \ - ((sbp)->s_v1.s_reserved_for_journal = cpu_to_le16(v)) - -/* LOGGING -- */ - -/* - * These all interelate for performance. - * - * If the journal block count is smaller than n transactions, you lose speed. - * I don't know what n is yet, I'm guessing 8-16. - * - * typical transaction size depends on the application, how often fsync is - * called, and how many metadata blocks you dirty in a 30 second period. - * The more small files (<16k) you use, the larger your transactions will - * be. - * - * If your journal fills faster than dirty buffers get flushed to disk, it - * must flush them before allowing the journal to wrap, which slows things - * down. If you need high speed meta data updates, the journal should be - * big enough to prevent wrapping before dirty meta blocks get to disk. - * - * If the batch max is smaller than the transaction max, you'll waste space - * at the end of the journal because journal_end sets the next transaction - * to start at 0 if the next transaction has any chance of wrapping. - * - * The large the batch max age, the better the speed, and the more meta - * data changes you'll lose after a crash. - */ - -/* don't mess with these for a while */ -/* we have a node size define somewhere in reiserfs_fs.h. -Hans */ -#define JOURNAL_BLOCK_SIZE 4096 /* BUG gotta get rid of this */ -#define JOURNAL_MAX_CNODE 1500 /* max cnodes to allocate. */ -#define JOURNAL_HASH_SIZE 8192 - -/* number of copies of the bitmaps to have floating. Must be >= 2 */ -#define JOURNAL_NUM_BITMAPS 5 - -/* - * One of these for every block in every transaction - * Each one is in two hash tables. First, a hash of the current transaction, - * and after journal_end, a hash of all the in memory transactions. - * next and prev are used by the current transaction (journal_hash). - * hnext and hprev are used by journal_list_hash. If a block is in more - * than one transaction, the journal_list_hash links it in multiple times. - * This allows flush_journal_list to remove just the cnode belonging to a - * given transaction. - */ -struct reiserfs_journal_cnode { - struct buffer_head *bh; /* real buffer head */ - struct super_block *sb; /* dev of real buffer head */ - - /* block number of real buffer head, == 0 when buffer on disk */ - __u32 blocknr; - - unsigned long state; - - /* journal list this cnode lives in */ - struct reiserfs_journal_list *jlist; - - struct reiserfs_journal_cnode *next; /* next in transaction list */ - struct reiserfs_journal_cnode *prev; /* prev in transaction list */ - struct reiserfs_journal_cnode *hprev; /* prev in hash list */ - struct reiserfs_journal_cnode *hnext; /* next in hash list */ -}; - -struct reiserfs_bitmap_node { - int id; - char *data; - struct list_head list; -}; - -struct reiserfs_list_bitmap { - struct reiserfs_journal_list *journal_list; - struct reiserfs_bitmap_node **bitmaps; -}; - -/* - * one of these for each transaction. The most important part here is the - * j_realblock. this list of cnodes is used to hash all the blocks in all - * the commits, to mark all the real buffer heads dirty once all the commits - * hit the disk, and to make sure every real block in a transaction is on - * disk before allowing the log area to be overwritten - */ -struct reiserfs_journal_list { - unsigned long j_start; - unsigned long j_state; - unsigned long j_len; - atomic_t j_nonzerolen; - atomic_t j_commit_left; - - /* all commits older than this on disk */ - atomic_t j_older_commits_done; - - struct mutex j_commit_mutex; - unsigned int j_trans_id; - time64_t j_timestamp; /* write-only but useful for crash dump analysis */ - struct reiserfs_list_bitmap *j_list_bitmap; - struct buffer_head *j_commit_bh; /* commit buffer head */ - struct reiserfs_journal_cnode *j_realblock; - struct reiserfs_journal_cnode *j_freedlist; /* list of buffers that were freed during this trans. free each of these on flush */ - /* time ordered list of all active transactions */ - struct list_head j_list; - - /* - * time ordered list of all transactions we haven't tried - * to flush yet - */ - struct list_head j_working_list; - - /* list of tail conversion targets in need of flush before commit */ - struct list_head j_tail_bh_list; - - /* list of data=ordered buffers in need of flush before commit */ - struct list_head j_bh_list; - int j_refcount; -}; - -struct reiserfs_journal { - struct buffer_head **j_ap_blocks; /* journal blocks on disk */ - /* newest journal block */ - struct reiserfs_journal_cnode *j_last; - - /* oldest journal block. start here for traverse */ - struct reiserfs_journal_cnode *j_first; - - struct file *j_bdev_file; - - /* first block on s_dev of reserved area journal */ - int j_1st_reserved_block; - - unsigned long j_state; - unsigned int j_trans_id; - unsigned long j_mount_id; - - /* start of current waiting commit (index into j_ap_blocks) */ - unsigned long j_start; - unsigned long j_len; /* length of current waiting commit */ - - /* number of buffers requested by journal_begin() */ - unsigned long j_len_alloc; - - atomic_t j_wcount; /* count of writers for current commit */ - - /* batch count. allows turning X transactions into 1 */ - unsigned long j_bcount; - - /* first unflushed transactions offset */ - unsigned long j_first_unflushed_offset; - - /* last fully flushed journal timestamp */ - unsigned j_last_flush_trans_id; - - struct buffer_head *j_header_bh; - - time64_t j_trans_start_time; /* time this transaction started */ - struct mutex j_mutex; - struct mutex j_flush_mutex; - - /* wait for current transaction to finish before starting new one */ - wait_queue_head_t j_join_wait; - - atomic_t j_jlock; /* lock for j_join_wait */ - int j_list_bitmap_index; /* number of next list bitmap to use */ - - /* no more journal begins allowed. MUST sleep on j_join_wait */ - int j_must_wait; - - /* next journal_end will flush all journal list */ - int j_next_full_flush; - - /* next journal_end will flush all async commits */ - int j_next_async_flush; - - int j_cnode_used; /* number of cnodes on the used list */ - int j_cnode_free; /* number of cnodes on the free list */ - - /* max number of blocks in a transaction. */ - unsigned int j_trans_max; - - /* max number of blocks to batch into a trans */ - unsigned int j_max_batch; - - /* in seconds, how old can an async commit be */ - unsigned int j_max_commit_age; - - /* in seconds, how old can a transaction be */ - unsigned int j_max_trans_age; - - /* the default for the max commit age */ - unsigned int j_default_max_commit_age; - - struct reiserfs_journal_cnode *j_cnode_free_list; - - /* orig pointer returned from vmalloc */ - struct reiserfs_journal_cnode *j_cnode_free_orig; - - struct reiserfs_journal_list *j_current_jl; - int j_free_bitmap_nodes; - int j_used_bitmap_nodes; - - int j_num_lists; /* total number of active transactions */ - int j_num_work_lists; /* number that need attention from kreiserfsd */ - - /* debugging to make sure things are flushed in order */ - unsigned int j_last_flush_id; - - /* debugging to make sure things are committed in order */ - unsigned int j_last_commit_id; - - struct list_head j_bitmap_nodes; - struct list_head j_dirty_buffers; - spinlock_t j_dirty_buffers_lock; /* protects j_dirty_buffers */ - - /* list of all active transactions */ - struct list_head j_journal_list; - - /* lists that haven't been touched by writeback attempts */ - struct list_head j_working_list; - - /* hash table for real buffer heads in current trans */ - struct reiserfs_journal_cnode *j_hash_table[JOURNAL_HASH_SIZE]; - - /* hash table for all the real buffer heads in all the transactions */ - struct reiserfs_journal_cnode *j_list_hash_table[JOURNAL_HASH_SIZE]; - - /* array of bitmaps to record the deleted blocks */ - struct reiserfs_list_bitmap j_list_bitmap[JOURNAL_NUM_BITMAPS]; - - /* list of inodes which have preallocated blocks */ - struct list_head j_prealloc_list; - int j_persistent_trans; - unsigned long j_max_trans_size; - unsigned long j_max_batch_size; - - int j_errno; - - /* when flushing ordered buffers, throttle new ordered writers */ - struct delayed_work j_work; - struct super_block *j_work_sb; - atomic_t j_async_throttle; -}; - -enum journal_state_bits { - J_WRITERS_BLOCKED = 1, /* set when new writers not allowed */ - J_WRITERS_QUEUED, /* set when log is full due to too many writers */ - J_ABORTED, /* set when log is aborted */ -}; - -/* ick. magic string to find desc blocks in the journal */ -#define JOURNAL_DESC_MAGIC "ReIsErLB" - -typedef __u32(*hashf_t) (const signed char *, int); - -struct reiserfs_bitmap_info { - __u32 free_count; -}; - -struct proc_dir_entry; - -#if defined( CONFIG_PROC_FS ) && defined( CONFIG_REISERFS_PROC_INFO ) -typedef unsigned long int stat_cnt_t; -typedef struct reiserfs_proc_info_data { - spinlock_t lock; - int exiting; - int max_hash_collisions; - - stat_cnt_t breads; - stat_cnt_t bread_miss; - stat_cnt_t search_by_key; - stat_cnt_t search_by_key_fs_changed; - stat_cnt_t search_by_key_restarted; - - stat_cnt_t insert_item_restarted; - stat_cnt_t paste_into_item_restarted; - stat_cnt_t cut_from_item_restarted; - stat_cnt_t delete_solid_item_restarted; - stat_cnt_t delete_item_restarted; - - stat_cnt_t leaked_oid; - stat_cnt_t leaves_removable; - - /* - * balances per level. - * Use explicit 5 as MAX_HEIGHT is not visible yet. - */ - stat_cnt_t balance_at[5]; /* XXX */ - /* sbk == search_by_key */ - stat_cnt_t sbk_read_at[5]; /* XXX */ - stat_cnt_t sbk_fs_changed[5]; - stat_cnt_t sbk_restarted[5]; - stat_cnt_t items_at[5]; /* XXX */ - stat_cnt_t free_at[5]; /* XXX */ - stat_cnt_t can_node_be_removed[5]; /* XXX */ - long int lnum[5]; /* XXX */ - long int rnum[5]; /* XXX */ - long int lbytes[5]; /* XXX */ - long int rbytes[5]; /* XXX */ - stat_cnt_t get_neighbors[5]; - stat_cnt_t get_neighbors_restart[5]; - stat_cnt_t need_l_neighbor[5]; - stat_cnt_t need_r_neighbor[5]; - - stat_cnt_t free_block; - struct __scan_bitmap_stats { - stat_cnt_t call; - stat_cnt_t wait; - stat_cnt_t bmap; - stat_cnt_t retry; - stat_cnt_t in_journal_hint; - stat_cnt_t in_journal_nohint; - stat_cnt_t stolen; - } scan_bitmap; - struct __journal_stats { - stat_cnt_t in_journal; - stat_cnt_t in_journal_bitmap; - stat_cnt_t in_journal_reusable; - stat_cnt_t lock_journal; - stat_cnt_t lock_journal_wait; - stat_cnt_t journal_being; - stat_cnt_t journal_relock_writers; - stat_cnt_t journal_relock_wcount; - stat_cnt_t mark_dirty; - stat_cnt_t mark_dirty_already; - stat_cnt_t mark_dirty_notjournal; - stat_cnt_t restore_prepared; - stat_cnt_t prepare; - stat_cnt_t prepare_retry; - } journal; -} reiserfs_proc_info_data_t; -#else -typedef struct reiserfs_proc_info_data { -} reiserfs_proc_info_data_t; -#endif - -/* Number of quota types we support */ -#define REISERFS_MAXQUOTAS 2 - -/* reiserfs union of in-core super block data */ -struct reiserfs_sb_info { - /* Buffer containing the super block */ - struct buffer_head *s_sbh; - - /* Pointer to the on-disk super block in the buffer */ - struct reiserfs_super_block *s_rs; - struct reiserfs_bitmap_info *s_ap_bitmap; - - /* pointer to journal information */ - struct reiserfs_journal *s_journal; - - unsigned short s_mount_state; /* reiserfs state (valid, invalid) */ - - /* Serialize writers access, replace the old bkl */ - struct mutex lock; - - /* Owner of the lock (can be recursive) */ - struct task_struct *lock_owner; - - /* Depth of the lock, start from -1 like the bkl */ - int lock_depth; - - struct workqueue_struct *commit_wq; - - /* Comment? -Hans */ - void (*end_io_handler) (struct buffer_head *, int); - - /* - * pointer to function which is used to sort names in directory. - * Set on mount - */ - hashf_t s_hash_function; - - /* reiserfs's mount options are set here */ - unsigned long s_mount_opt; - - /* This is a structure that describes block allocator options */ - struct { - /* Bitfield for enable/disable kind of options */ - unsigned long bits; - - /* - * size started from which we consider file - * to be a large one (in blocks) - */ - unsigned long large_file_size; - - int border; /* percentage of disk, border takes */ - - /* - * Minimal file size (in blocks) starting - * from which we do preallocations - */ - int preallocmin; - - /* - * Number of blocks we try to prealloc when file - * reaches preallocmin size (in blocks) or prealloc_list - is empty. - */ - int preallocsize; - } s_alloc_options; - - /* Comment? -Hans */ - wait_queue_head_t s_wait; - /* increased by one every time the tree gets re-balanced */ - atomic_t s_generation_counter; - - /* File system properties. Currently holds on-disk FS format */ - unsigned long s_properties; - - /* session statistics */ - int s_disk_reads; - int s_disk_writes; - int s_fix_nodes; - int s_do_balance; - int s_unneeded_left_neighbor; - int s_good_search_by_key_reada; - int s_bmaps; - int s_bmaps_without_search; - int s_direct2indirect; - int s_indirect2direct; - - /* - * set up when it's ok for reiserfs_read_inode2() to read from - * disk inode with nlink==0. Currently this is only used during - * finish_unfinished() processing at mount time - */ - int s_is_unlinked_ok; - - reiserfs_proc_info_data_t s_proc_info_data; - struct proc_dir_entry *procdir; - - /* amount of blocks reserved for further allocations */ - int reserved_blocks; - - - /* this lock on now only used to protect reserved_blocks variable */ - spinlock_t bitmap_lock; - struct dentry *priv_root; /* root of /.reiserfs_priv */ - struct dentry *xattr_root; /* root of /.reiserfs_priv/xattrs */ - int j_errno; - - int work_queued; /* non-zero delayed work is queued */ - struct delayed_work old_work; /* old transactions flush delayed work */ - spinlock_t old_work_lock; /* protects old_work and work_queued */ - -#ifdef CONFIG_QUOTA - char *s_qf_names[REISERFS_MAXQUOTAS]; - int s_jquota_fmt; -#endif - char *s_jdev; /* Stored jdev for mount option showing */ -#ifdef CONFIG_REISERFS_CHECK - - /* - * Detects whether more than one copy of tb exists per superblock - * as a means of checking whether do_balance is executing - * concurrently against another tree reader/writer on a same - * mount point. - */ - struct tree_balance *cur_tb; -#endif -}; - -/* Definitions of reiserfs on-disk properties: */ -#define REISERFS_3_5 0 -#define REISERFS_3_6 1 -#define REISERFS_OLD_FORMAT 2 - -/* Mount options */ -enum reiserfs_mount_options { - /* large tails will be created in a session */ - REISERFS_LARGETAIL, - /* - * small (for files less than block size) tails will - * be created in a session - */ - REISERFS_SMALLTAIL, - - /* replay journal and return 0. Use by fsck */ - REPLAYONLY, - - /* - * -o conv: causes conversion of old format super block to the - * new format. If not specified - old partition will be dealt - * with in a manner of 3.5.x - */ - REISERFS_CONVERT, - - /* - * -o hash={tea, rupasov, r5, detect} is meant for properly mounting - * reiserfs disks from 3.5.19 or earlier. 99% of the time, this - * option is not required. If the normal autodection code can't - * determine which hash to use (because both hashes had the same - * value for a file) use this option to force a specific hash. - * It won't allow you to override the existing hash on the FS, so - * if you have a tea hash disk, and mount with -o hash=rupasov, - * the mount will fail. - */ - FORCE_TEA_HASH, /* try to force tea hash on mount */ - FORCE_RUPASOV_HASH, /* try to force rupasov hash on mount */ - FORCE_R5_HASH, /* try to force rupasov hash on mount */ - FORCE_HASH_DETECT, /* try to detect hash function on mount */ - - REISERFS_DATA_LOG, - REISERFS_DATA_ORDERED, - REISERFS_DATA_WRITEBACK, - - /* - * used for testing experimental features, makes benchmarking new - * features with and without more convenient, should never be used by - * users in any code shipped to users (ideally) - */ - - REISERFS_NO_BORDER, - REISERFS_NO_UNHASHED_RELOCATION, - REISERFS_HASHED_RELOCATION, - REISERFS_ATTRS, - REISERFS_XATTRS_USER, - REISERFS_POSIXACL, - REISERFS_EXPOSE_PRIVROOT, - REISERFS_BARRIER_NONE, - REISERFS_BARRIER_FLUSH, - - /* Actions on error */ - REISERFS_ERROR_PANIC, - REISERFS_ERROR_RO, - REISERFS_ERROR_CONTINUE, - - REISERFS_USRQUOTA, /* User quota option specified */ - REISERFS_GRPQUOTA, /* Group quota option specified */ - - REISERFS_TEST1, - REISERFS_TEST2, - REISERFS_TEST3, - REISERFS_TEST4, - REISERFS_UNSUPPORTED_OPT, -}; - -#define reiserfs_r5_hash(s) (REISERFS_SB(s)->s_mount_opt & (1 << FORCE_R5_HASH)) -#define reiserfs_rupasov_hash(s) (REISERFS_SB(s)->s_mount_opt & (1 << FORCE_RUPASOV_HASH)) -#define reiserfs_tea_hash(s) (REISERFS_SB(s)->s_mount_opt & (1 << FORCE_TEA_HASH)) -#define reiserfs_hash_detect(s) (REISERFS_SB(s)->s_mount_opt & (1 << FORCE_HASH_DETECT)) -#define reiserfs_no_border(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_NO_BORDER)) -#define reiserfs_no_unhashed_relocation(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_NO_UNHASHED_RELOCATION)) -#define reiserfs_hashed_relocation(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_HASHED_RELOCATION)) -#define reiserfs_test4(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_TEST4)) - -#define have_large_tails(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_LARGETAIL)) -#define have_small_tails(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_SMALLTAIL)) -#define replay_only(s) (REISERFS_SB(s)->s_mount_opt & (1 << REPLAYONLY)) -#define reiserfs_attrs(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_ATTRS)) -#define old_format_only(s) (REISERFS_SB(s)->s_properties & (1 << REISERFS_3_5)) -#define convert_reiserfs(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_CONVERT)) -#define reiserfs_data_log(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_DATA_LOG)) -#define reiserfs_data_ordered(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_DATA_ORDERED)) -#define reiserfs_data_writeback(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_DATA_WRITEBACK)) -#define reiserfs_xattrs_user(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_XATTRS_USER)) -#define reiserfs_posixacl(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_POSIXACL)) -#define reiserfs_expose_privroot(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_EXPOSE_PRIVROOT)) -#define reiserfs_xattrs_optional(s) (reiserfs_xattrs_user(s) || reiserfs_posixacl(s)) -#define reiserfs_barrier_none(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_BARRIER_NONE)) -#define reiserfs_barrier_flush(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_BARRIER_FLUSH)) - -#define reiserfs_error_panic(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_ERROR_PANIC)) -#define reiserfs_error_ro(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_ERROR_RO)) - -void reiserfs_file_buffer(struct buffer_head *bh, int list); -extern struct file_system_type reiserfs_fs_type; -int reiserfs_resize(struct super_block *, unsigned long); - -#define CARRY_ON 0 -#define SCHEDULE_OCCURRED 1 - -#define SB_BUFFER_WITH_SB(s) (REISERFS_SB(s)->s_sbh) -#define SB_JOURNAL(s) (REISERFS_SB(s)->s_journal) -#define SB_JOURNAL_1st_RESERVED_BLOCK(s) (SB_JOURNAL(s)->j_1st_reserved_block) -#define SB_JOURNAL_LEN_FREE(s) (SB_JOURNAL(s)->j_journal_len_free) -#define SB_AP_BITMAP(s) (REISERFS_SB(s)->s_ap_bitmap) - -#define SB_DISK_JOURNAL_HEAD(s) (SB_JOURNAL(s)->j_header_bh->) - -#define reiserfs_is_journal_aborted(journal) (unlikely (__reiserfs_is_journal_aborted (journal))) -static inline int __reiserfs_is_journal_aborted(struct reiserfs_journal - *journal) -{ - return test_bit(J_ABORTED, &journal->j_state); -} - -/* - * Locking primitives. The write lock is a per superblock - * special mutex that has properties close to the Big Kernel Lock - * which was used in the previous locking scheme. - */ -void reiserfs_write_lock(struct super_block *s); -void reiserfs_write_unlock(struct super_block *s); -int __must_check reiserfs_write_unlock_nested(struct super_block *s); -void reiserfs_write_lock_nested(struct super_block *s, int depth); - -#ifdef CONFIG_REISERFS_CHECK -void reiserfs_lock_check_recursive(struct super_block *s); -#else -static inline void reiserfs_lock_check_recursive(struct super_block *s) { } -#endif - -/* - * Several mutexes depend on the write lock. - * However sometimes we want to relax the write lock while we hold - * these mutexes, according to the release/reacquire on schedule() - * properties of the Bkl that were used. - * Reiserfs performances and locking were based on this scheme. - * Now that the write lock is a mutex and not the bkl anymore, doing so - * may result in a deadlock: - * - * A acquire write_lock - * A acquire j_commit_mutex - * A release write_lock and wait for something - * B acquire write_lock - * B can't acquire j_commit_mutex and sleep - * A can't acquire write lock anymore - * deadlock - * - * What we do here is avoiding such deadlock by playing the same game - * than the Bkl: if we can't acquire a mutex that depends on the write lock, - * we release the write lock, wait a bit and then retry. - * - * The mutexes concerned by this hack are: - * - The commit mutex of a journal list - * - The flush mutex - * - The journal lock - * - The inode mutex - */ -static inline void reiserfs_mutex_lock_safe(struct mutex *m, - struct super_block *s) -{ - int depth; - - depth = reiserfs_write_unlock_nested(s); - mutex_lock(m); - reiserfs_write_lock_nested(s, depth); -} - -static inline void -reiserfs_mutex_lock_nested_safe(struct mutex *m, unsigned int subclass, - struct super_block *s) -{ - int depth; - - depth = reiserfs_write_unlock_nested(s); - mutex_lock_nested(m, subclass); - reiserfs_write_lock_nested(s, depth); -} - -static inline void -reiserfs_down_read_safe(struct rw_semaphore *sem, struct super_block *s) -{ - int depth; - depth = reiserfs_write_unlock_nested(s); - down_read(sem); - reiserfs_write_lock_nested(s, depth); -} - -/* - * When we schedule, we usually want to also release the write lock, - * according to the previous bkl based locking scheme of reiserfs. - */ -static inline void reiserfs_cond_resched(struct super_block *s) -{ - if (need_resched()) { - int depth; - - depth = reiserfs_write_unlock_nested(s); - schedule(); - reiserfs_write_lock_nested(s, depth); - } -} - -struct fid; - -/* - * in reading the #defines, it may help to understand that they employ - * the following abbreviations: - * - * B = Buffer - * I = Item header - * H = Height within the tree (should be changed to LEV) - * N = Number of the item in the node - * STAT = stat data - * DEH = Directory Entry Header - * EC = Entry Count - * E = Entry number - * UL = Unsigned Long - * BLKH = BLocK Header - * UNFM = UNForMatted node - * DC = Disk Child - * P = Path - * - * These #defines are named by concatenating these abbreviations, - * where first comes the arguments, and last comes the return value, - * of the macro. - */ - -#define USE_INODE_GENERATION_COUNTER - -#define REISERFS_PREALLOCATE -#define DISPLACE_NEW_PACKING_LOCALITIES -#define PREALLOCATION_SIZE 9 - -/* n must be power of 2 */ -#define _ROUND_UP(x,n) (((x)+(n)-1u) & ~((n)-1u)) - -/* - * to be ok for alpha and others we have to align structures to 8 byte - * boundary. - * FIXME: do not change 4 by anything else: there is code which relies on that - */ -#define ROUND_UP(x) _ROUND_UP(x,8LL) - -/* - * debug levels. Right now, CONFIG_REISERFS_CHECK means print all debug - * messages. - */ -#define REISERFS_DEBUG_CODE 5 /* extra messages to help find/debug errors */ - -void __reiserfs_warning(struct super_block *s, const char *id, - const char *func, const char *fmt, ...); -#define reiserfs_warning(s, id, fmt, args...) \ - __reiserfs_warning(s, id, __func__, fmt, ##args) -/* assertions handling */ - -/* always check a condition and panic if it's false. */ -#define __RASSERT(cond, scond, format, args...) \ -do { \ - if (!(cond)) \ - reiserfs_panic(NULL, "assertion failure", "(" #cond ") at " \ - __FILE__ ":%i:%s: " format "\n", \ - __LINE__, __func__ , ##args); \ -} while (0) - -#define RASSERT(cond, format, args...) __RASSERT(cond, #cond, format, ##args) - -#if defined( CONFIG_REISERFS_CHECK ) -#define RFALSE(cond, format, args...) __RASSERT(!(cond), "!(" #cond ")", format, ##args) -#else -#define RFALSE( cond, format, args... ) do {;} while( 0 ) -#endif - -#define CONSTF __attribute_const__ -/* - * Disk Data Structures - */ - -/*************************************************************************** - * SUPER BLOCK * - ***************************************************************************/ - -/* - * Structure of super block on disk, a version of which in RAM is often - * accessed as REISERFS_SB(s)->s_rs. The version in RAM is part of a larger - * structure containing fields never written to disk. - */ -#define UNSET_HASH 0 /* Detect hash on disk */ -#define TEA_HASH 1 -#define YURA_HASH 2 -#define R5_HASH 3 -#define DEFAULT_HASH R5_HASH - -struct journal_params { - /* where does journal start from on its * device */ - __le32 jp_journal_1st_block; - - /* journal device st_rdev */ - __le32 jp_journal_dev; - - /* size of the journal */ - __le32 jp_journal_size; - - /* max number of blocks in a transaction. */ - __le32 jp_journal_trans_max; - - /* - * random value made on fs creation - * (this was sb_journal_block_count) - */ - __le32 jp_journal_magic; - - /* max number of blocks to batch into a trans */ - __le32 jp_journal_max_batch; - - /* in seconds, how old can an async commit be */ - __le32 jp_journal_max_commit_age; - - /* in seconds, how old can a transaction be */ - __le32 jp_journal_max_trans_age; -}; - -/* this is the super from 3.5.X, where X >= 10 */ -struct reiserfs_super_block_v1 { - __le32 s_block_count; /* blocks count */ - __le32 s_free_blocks; /* free blocks count */ - __le32 s_root_block; /* root block number */ - struct journal_params s_journal; - __le16 s_blocksize; /* block size */ - - /* max size of object id array, see get_objectid() commentary */ - __le16 s_oid_maxsize; - __le16 s_oid_cursize; /* current size of object id array */ - - /* this is set to 1 when filesystem was umounted, to 2 - when not */ - __le16 s_umount_state; - - /* - * reiserfs magic string indicates that file system is reiserfs: - * "ReIsErFs" or "ReIsEr2Fs" or "ReIsEr3Fs" - */ - char s_magic[10]; - - /* - * it is set to used by fsck to mark which - * phase of rebuilding is done - */ - __le16 s_fs_state; - /* - * indicate, what hash function is being use - * to sort names in a directory - */ - __le32 s_hash_function_code; - __le16 s_tree_height; /* height of disk tree */ - - /* - * amount of bitmap blocks needed to address - * each block of file system - */ - __le16 s_bmap_nr; - - /* - * this field is only reliable on filesystem with non-standard journal - */ - __le16 s_version; - - /* - * size in blocks of journal area on main device, we need to - * keep after making fs with non-standard journal - */ - __le16 s_reserved_for_journal; -} __attribute__ ((__packed__)); - -#define SB_SIZE_V1 (sizeof(struct reiserfs_super_block_v1)) - -/* this is the on disk super block */ -struct reiserfs_super_block { - struct reiserfs_super_block_v1 s_v1; - __le32 s_inode_generation; - - /* Right now used only by inode-attributes, if enabled */ - __le32 s_flags; - - unsigned char s_uuid[16]; /* filesystem unique identifier */ - unsigned char s_label[16]; /* filesystem volume label */ - __le16 s_mnt_count; /* Count of mounts since last fsck */ - __le16 s_max_mnt_count; /* Maximum mounts before check */ - __le32 s_lastcheck; /* Timestamp of last fsck */ - __le32 s_check_interval; /* Interval between checks */ - - /* - * zero filled by mkreiserfs and reiserfs_convert_objectid_map_v1() - * so any additions must be updated there as well. */ - char s_unused[76]; -} __attribute__ ((__packed__)); - -#define SB_SIZE (sizeof(struct reiserfs_super_block)) - -#define REISERFS_VERSION_1 0 -#define REISERFS_VERSION_2 2 - -/* on-disk super block fields converted to cpu form */ -#define SB_DISK_SUPER_BLOCK(s) (REISERFS_SB(s)->s_rs) -#define SB_V1_DISK_SUPER_BLOCK(s) (&(SB_DISK_SUPER_BLOCK(s)->s_v1)) -#define SB_BLOCKSIZE(s) \ - le32_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_blocksize)) -#define SB_BLOCK_COUNT(s) \ - le32_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_block_count)) -#define SB_FREE_BLOCKS(s) \ - le32_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_free_blocks)) -#define SB_REISERFS_MAGIC(s) \ - (SB_V1_DISK_SUPER_BLOCK(s)->s_magic) -#define SB_ROOT_BLOCK(s) \ - le32_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_root_block)) -#define SB_TREE_HEIGHT(s) \ - le16_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_tree_height)) -#define SB_REISERFS_STATE(s) \ - le16_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_umount_state)) -#define SB_VERSION(s) le16_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_version)) -#define SB_BMAP_NR(s) le16_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_bmap_nr)) - -#define PUT_SB_BLOCK_COUNT(s, val) \ - do { SB_V1_DISK_SUPER_BLOCK(s)->s_block_count = cpu_to_le32(val); } while (0) -#define PUT_SB_FREE_BLOCKS(s, val) \ - do { SB_V1_DISK_SUPER_BLOCK(s)->s_free_blocks = cpu_to_le32(val); } while (0) -#define PUT_SB_ROOT_BLOCK(s, val) \ - do { SB_V1_DISK_SUPER_BLOCK(s)->s_root_block = cpu_to_le32(val); } while (0) -#define PUT_SB_TREE_HEIGHT(s, val) \ - do { SB_V1_DISK_SUPER_BLOCK(s)->s_tree_height = cpu_to_le16(val); } while (0) -#define PUT_SB_REISERFS_STATE(s, val) \ - do { SB_V1_DISK_SUPER_BLOCK(s)->s_umount_state = cpu_to_le16(val); } while (0) -#define PUT_SB_VERSION(s, val) \ - do { SB_V1_DISK_SUPER_BLOCK(s)->s_version = cpu_to_le16(val); } while (0) -#define PUT_SB_BMAP_NR(s, val) \ - do { SB_V1_DISK_SUPER_BLOCK(s)->s_bmap_nr = cpu_to_le16 (val); } while (0) - -#define SB_ONDISK_JP(s) (&SB_V1_DISK_SUPER_BLOCK(s)->s_journal) -#define SB_ONDISK_JOURNAL_SIZE(s) \ - le32_to_cpu ((SB_ONDISK_JP(s)->jp_journal_size)) -#define SB_ONDISK_JOURNAL_1st_BLOCK(s) \ - le32_to_cpu ((SB_ONDISK_JP(s)->jp_journal_1st_block)) -#define SB_ONDISK_JOURNAL_DEVICE(s) \ - le32_to_cpu ((SB_ONDISK_JP(s)->jp_journal_dev)) -#define SB_ONDISK_RESERVED_FOR_JOURNAL(s) \ - le16_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_reserved_for_journal)) - -#define is_block_in_log_or_reserved_area(s, block) \ - block >= SB_JOURNAL_1st_RESERVED_BLOCK(s) \ - && block < SB_JOURNAL_1st_RESERVED_BLOCK(s) + \ - ((!is_reiserfs_jr(SB_DISK_SUPER_BLOCK(s)) ? \ - SB_ONDISK_JOURNAL_SIZE(s) + 1 : SB_ONDISK_RESERVED_FOR_JOURNAL(s))) - -int is_reiserfs_3_5(struct reiserfs_super_block *rs); -int is_reiserfs_3_6(struct reiserfs_super_block *rs); -int is_reiserfs_jr(struct reiserfs_super_block *rs); - -/* - * ReiserFS leaves the first 64k unused, so that partition labels have - * enough space. If someone wants to write a fancy bootloader that - * needs more than 64k, let us know, and this will be increased in size. - * This number must be larger than the largest block size on any - * platform, or code will break. -Hans - */ -#define REISERFS_DISK_OFFSET_IN_BYTES (64 * 1024) -#define REISERFS_FIRST_BLOCK unused_define -#define REISERFS_JOURNAL_OFFSET_IN_BYTES REISERFS_DISK_OFFSET_IN_BYTES - -/* the spot for the super in versions 3.5 - 3.5.10 (inclusive) */ -#define REISERFS_OLD_DISK_OFFSET_IN_BYTES (8 * 1024) - -/* reiserfs internal error code (used by search_by_key and fix_nodes)) */ -#define CARRY_ON 0 -#define REPEAT_SEARCH -1 -#define IO_ERROR -2 -#define NO_DISK_SPACE -3 -#define NO_BALANCING_NEEDED (-4) -#define NO_MORE_UNUSED_CONTIGUOUS_BLOCKS (-5) -#define QUOTA_EXCEEDED -6 - -typedef __u32 b_blocknr_t; -typedef __le32 unp_t; - -struct unfm_nodeinfo { - unp_t unfm_nodenum; - unsigned short unfm_freespace; -}; - -/* there are two formats of keys: 3.5 and 3.6 */ -#define KEY_FORMAT_3_5 0 -#define KEY_FORMAT_3_6 1 - -/* there are two stat datas */ -#define STAT_DATA_V1 0 -#define STAT_DATA_V2 1 - -static inline struct reiserfs_inode_info *REISERFS_I(const struct inode *inode) -{ - return container_of(inode, struct reiserfs_inode_info, vfs_inode); -} - -static inline struct reiserfs_sb_info *REISERFS_SB(const struct super_block *sb) -{ - return sb->s_fs_info; -} - -/* - * Don't trust REISERFS_SB(sb)->s_bmap_nr, it's a u16 - * which overflows on large file systems. - */ -static inline __u32 reiserfs_bmap_count(struct super_block *sb) -{ - return (SB_BLOCK_COUNT(sb) - 1) / (sb->s_blocksize * 8) + 1; -} - -static inline int bmap_would_wrap(unsigned bmap_nr) -{ - return bmap_nr > ((1LL << 16) - 1); -} - -extern const struct xattr_handler * const reiserfs_xattr_handlers[]; - -/* - * this says about version of key of all items (but stat data) the - * object consists of - */ -#define get_inode_item_key_version( inode ) \ - ((REISERFS_I(inode)->i_flags & i_item_key_version_mask) ? KEY_FORMAT_3_6 : KEY_FORMAT_3_5) - -#define set_inode_item_key_version( inode, version ) \ - ({ if((version)==KEY_FORMAT_3_6) \ - REISERFS_I(inode)->i_flags |= i_item_key_version_mask; \ - else \ - REISERFS_I(inode)->i_flags &= ~i_item_key_version_mask; }) - -#define get_inode_sd_version(inode) \ - ((REISERFS_I(inode)->i_flags & i_stat_data_version_mask) ? STAT_DATA_V2 : STAT_DATA_V1) - -#define set_inode_sd_version(inode, version) \ - ({ if((version)==STAT_DATA_V2) \ - REISERFS_I(inode)->i_flags |= i_stat_data_version_mask; \ - else \ - REISERFS_I(inode)->i_flags &= ~i_stat_data_version_mask; }) - -/* - * This is an aggressive tail suppression policy, I am hoping it - * improves our benchmarks. The principle behind it is that percentage - * space saving is what matters, not absolute space saving. This is - * non-intuitive, but it helps to understand it if you consider that the - * cost to access 4 blocks is not much more than the cost to access 1 - * block, if you have to do a seek and rotate. A tail risks a - * non-linear disk access that is significant as a percentage of total - * time cost for a 4 block file and saves an amount of space that is - * less significant as a percentage of space, or so goes the hypothesis. - * -Hans - */ -#define STORE_TAIL_IN_UNFM_S1(n_file_size,n_tail_size,n_block_size) \ -(\ - (!(n_tail_size)) || \ - (((n_tail_size) > MAX_DIRECT_ITEM_LEN(n_block_size)) || \ - ( (n_file_size) >= (n_block_size) * 4 ) || \ - ( ( (n_file_size) >= (n_block_size) * 3 ) && \ - ( (n_tail_size) >= (MAX_DIRECT_ITEM_LEN(n_block_size))/4) ) || \ - ( ( (n_file_size) >= (n_block_size) * 2 ) && \ - ( (n_tail_size) >= (MAX_DIRECT_ITEM_LEN(n_block_size))/2) ) || \ - ( ( (n_file_size) >= (n_block_size) ) && \ - ( (n_tail_size) >= (MAX_DIRECT_ITEM_LEN(n_block_size) * 3)/4) ) ) \ -) - -/* - * Another strategy for tails, this one means only create a tail if all the - * file would fit into one DIRECT item. - * Primary intention for this one is to increase performance by decreasing - * seeking. -*/ -#define STORE_TAIL_IN_UNFM_S2(n_file_size,n_tail_size,n_block_size) \ -(\ - (!(n_tail_size)) || \ - (((n_file_size) > MAX_DIRECT_ITEM_LEN(n_block_size)) ) \ -) - -/* - * values for s_umount_state field - */ -#define REISERFS_VALID_FS 1 -#define REISERFS_ERROR_FS 2 - -/* - * there are 5 item types currently - */ -#define TYPE_STAT_DATA 0 -#define TYPE_INDIRECT 1 -#define TYPE_DIRECT 2 -#define TYPE_DIRENTRY 3 -#define TYPE_MAXTYPE 3 -#define TYPE_ANY 15 /* FIXME: comment is required */ - -/*************************************************************************** - * KEY & ITEM HEAD * - ***************************************************************************/ - -/* * directories use this key as well as old files */ -struct offset_v1 { - __le32 k_offset; - __le32 k_uniqueness; -} __attribute__ ((__packed__)); - -struct offset_v2 { - __le64 v; -} __attribute__ ((__packed__)); - -static inline __u16 offset_v2_k_type(const struct offset_v2 *v2) -{ - __u8 type = le64_to_cpu(v2->v) >> 60; - return (type <= TYPE_MAXTYPE) ? type : TYPE_ANY; -} - -static inline void set_offset_v2_k_type(struct offset_v2 *v2, int type) -{ - v2->v = - (v2->v & cpu_to_le64(~0ULL >> 4)) | cpu_to_le64((__u64) type << 60); -} - -static inline loff_t offset_v2_k_offset(const struct offset_v2 *v2) -{ - return le64_to_cpu(v2->v) & (~0ULL >> 4); -} - -static inline void set_offset_v2_k_offset(struct offset_v2 *v2, loff_t offset) -{ - offset &= (~0ULL >> 4); - v2->v = (v2->v & cpu_to_le64(15ULL << 60)) | cpu_to_le64(offset); -} - -/* - * Key of an item determines its location in the S+tree, and - * is composed of 4 components - */ -struct reiserfs_key { - /* packing locality: by default parent directory object id */ - __le32 k_dir_id; - - __le32 k_objectid; /* object identifier */ - union { - struct offset_v1 k_offset_v1; - struct offset_v2 k_offset_v2; - } __attribute__ ((__packed__)) u; -} __attribute__ ((__packed__)); - -struct in_core_key { - /* packing locality: by default parent directory object id */ - __u32 k_dir_id; - __u32 k_objectid; /* object identifier */ - __u64 k_offset; - __u8 k_type; -}; - -struct cpu_key { - struct in_core_key on_disk_key; - int version; - /* 3 in all cases but direct2indirect and indirect2direct conversion */ - int key_length; -}; - -/* - * Our function for comparing keys can compare keys of different - * lengths. It takes as a parameter the length of the keys it is to - * compare. These defines are used in determining what is to be passed - * to it as that parameter. - */ -#define REISERFS_FULL_KEY_LEN 4 -#define REISERFS_SHORT_KEY_LEN 2 - -/* The result of the key compare */ -#define FIRST_GREATER 1 -#define SECOND_GREATER -1 -#define KEYS_IDENTICAL 0 -#define KEY_FOUND 1 -#define KEY_NOT_FOUND 0 - -#define KEY_SIZE (sizeof(struct reiserfs_key)) - -/* return values for search_by_key and clones */ -#define ITEM_FOUND 1 -#define ITEM_NOT_FOUND 0 -#define ENTRY_FOUND 1 -#define ENTRY_NOT_FOUND 0 -#define DIRECTORY_NOT_FOUND -1 -#define REGULAR_FILE_FOUND -2 -#define DIRECTORY_FOUND -3 -#define BYTE_FOUND 1 -#define BYTE_NOT_FOUND 0 -#define FILE_NOT_FOUND -1 - -#define POSITION_FOUND 1 -#define POSITION_NOT_FOUND 0 - -/* return values for reiserfs_find_entry and search_by_entry_key */ -#define NAME_FOUND 1 -#define NAME_NOT_FOUND 0 -#define GOTO_PREVIOUS_ITEM 2 -#define NAME_FOUND_INVISIBLE 3 - -/* - * Everything in the filesystem is stored as a set of items. The - * item head contains the key of the item, its free space (for - * indirect items) and specifies the location of the item itself - * within the block. - */ - -struct item_head { - /* - * Everything in the tree is found by searching for it based on - * its key. - */ - struct reiserfs_key ih_key; - union { - /* - * The free space in the last unformatted node of an - * indirect item if this is an indirect item. This - * equals 0xFFFF iff this is a direct item or stat data - * item. Note that the key, not this field, is used to - * determine the item type, and thus which field this - * union contains. - */ - __le16 ih_free_space_reserved; - - /* - * Iff this is a directory item, this field equals the - * number of directory entries in the directory item. - */ - __le16 ih_entry_count; - } __attribute__ ((__packed__)) u; - __le16 ih_item_len; /* total size of the item body */ - - /* an offset to the item body within the block */ - __le16 ih_item_location; - - /* - * 0 for all old items, 2 for new ones. Highest bit is set by fsck - * temporary, cleaned after all done - */ - __le16 ih_version; -} __attribute__ ((__packed__)); -/* size of item header */ -#define IH_SIZE (sizeof(struct item_head)) - -#define ih_free_space(ih) le16_to_cpu((ih)->u.ih_free_space_reserved) -#define ih_version(ih) le16_to_cpu((ih)->ih_version) -#define ih_entry_count(ih) le16_to_cpu((ih)->u.ih_entry_count) -#define ih_location(ih) le16_to_cpu((ih)->ih_item_location) -#define ih_item_len(ih) le16_to_cpu((ih)->ih_item_len) - -#define put_ih_free_space(ih, val) do { (ih)->u.ih_free_space_reserved = cpu_to_le16(val); } while(0) -#define put_ih_version(ih, val) do { (ih)->ih_version = cpu_to_le16(val); } while (0) -#define put_ih_entry_count(ih, val) do { (ih)->u.ih_entry_count = cpu_to_le16(val); } while (0) -#define put_ih_location(ih, val) do { (ih)->ih_item_location = cpu_to_le16(val); } while (0) -#define put_ih_item_len(ih, val) do { (ih)->ih_item_len = cpu_to_le16(val); } while (0) - -#define unreachable_item(ih) (ih_version(ih) & (1 << 15)) - -#define get_ih_free_space(ih) (ih_version (ih) == KEY_FORMAT_3_6 ? 0 : ih_free_space (ih)) -#define set_ih_free_space(ih,val) put_ih_free_space((ih), ((ih_version(ih) == KEY_FORMAT_3_6) ? 0 : (val))) - -/* - * these operate on indirect items, where you've got an array of ints - * at a possibly unaligned location. These are a noop on ia32 - * - * p is the array of __u32, i is the index into the array, v is the value - * to store there. - */ -#define get_block_num(p, i) get_unaligned_le32((p) + (i)) -#define put_block_num(p, i, v) put_unaligned_le32((v), (p) + (i)) - -/* * in old version uniqueness field shows key type */ -#define V1_SD_UNIQUENESS 0 -#define V1_INDIRECT_UNIQUENESS 0xfffffffe -#define V1_DIRECT_UNIQUENESS 0xffffffff -#define V1_DIRENTRY_UNIQUENESS 500 -#define V1_ANY_UNIQUENESS 555 /* FIXME: comment is required */ - -/* here are conversion routines */ -static inline int uniqueness2type(__u32 uniqueness) CONSTF; -static inline int uniqueness2type(__u32 uniqueness) -{ - switch ((int)uniqueness) { - case V1_SD_UNIQUENESS: - return TYPE_STAT_DATA; - case V1_INDIRECT_UNIQUENESS: - return TYPE_INDIRECT; - case V1_DIRECT_UNIQUENESS: - return TYPE_DIRECT; - case V1_DIRENTRY_UNIQUENESS: - return TYPE_DIRENTRY; - case V1_ANY_UNIQUENESS: - default: - return TYPE_ANY; - } -} - -static inline __u32 type2uniqueness(int type) CONSTF; -static inline __u32 type2uniqueness(int type) -{ - switch (type) { - case TYPE_STAT_DATA: - return V1_SD_UNIQUENESS; - case TYPE_INDIRECT: - return V1_INDIRECT_UNIQUENESS; - case TYPE_DIRECT: - return V1_DIRECT_UNIQUENESS; - case TYPE_DIRENTRY: - return V1_DIRENTRY_UNIQUENESS; - case TYPE_ANY: - default: - return V1_ANY_UNIQUENESS; - } -} - -/* - * key is pointer to on disk key which is stored in le, result is cpu, - * there is no way to get version of object from key, so, provide - * version to these defines - */ -static inline loff_t le_key_k_offset(int version, - const struct reiserfs_key *key) -{ - return (version == KEY_FORMAT_3_5) ? - le32_to_cpu(key->u.k_offset_v1.k_offset) : - offset_v2_k_offset(&(key->u.k_offset_v2)); -} - -static inline loff_t le_ih_k_offset(const struct item_head *ih) -{ - return le_key_k_offset(ih_version(ih), &(ih->ih_key)); -} - -static inline loff_t le_key_k_type(int version, const struct reiserfs_key *key) -{ - if (version == KEY_FORMAT_3_5) { - loff_t val = le32_to_cpu(key->u.k_offset_v1.k_uniqueness); - return uniqueness2type(val); - } else - return offset_v2_k_type(&(key->u.k_offset_v2)); -} - -static inline loff_t le_ih_k_type(const struct item_head *ih) -{ - return le_key_k_type(ih_version(ih), &(ih->ih_key)); -} - -static inline void set_le_key_k_offset(int version, struct reiserfs_key *key, - loff_t offset) -{ - if (version == KEY_FORMAT_3_5) - key->u.k_offset_v1.k_offset = cpu_to_le32(offset); - else - set_offset_v2_k_offset(&key->u.k_offset_v2, offset); -} - -static inline void add_le_key_k_offset(int version, struct reiserfs_key *key, - loff_t offset) -{ - set_le_key_k_offset(version, key, - le_key_k_offset(version, key) + offset); -} - -static inline void add_le_ih_k_offset(struct item_head *ih, loff_t offset) -{ - add_le_key_k_offset(ih_version(ih), &(ih->ih_key), offset); -} - -static inline void set_le_ih_k_offset(struct item_head *ih, loff_t offset) -{ - set_le_key_k_offset(ih_version(ih), &(ih->ih_key), offset); -} - -static inline void set_le_key_k_type(int version, struct reiserfs_key *key, - int type) -{ - if (version == KEY_FORMAT_3_5) { - type = type2uniqueness(type); - key->u.k_offset_v1.k_uniqueness = cpu_to_le32(type); - } else - set_offset_v2_k_type(&key->u.k_offset_v2, type); -} - -static inline void set_le_ih_k_type(struct item_head *ih, int type) -{ - set_le_key_k_type(ih_version(ih), &(ih->ih_key), type); -} - -static inline int is_direntry_le_key(int version, struct reiserfs_key *key) -{ - return le_key_k_type(version, key) == TYPE_DIRENTRY; -} - -static inline int is_direct_le_key(int version, struct reiserfs_key *key) -{ - return le_key_k_type(version, key) == TYPE_DIRECT; -} - -static inline int is_indirect_le_key(int version, struct reiserfs_key *key) -{ - return le_key_k_type(version, key) == TYPE_INDIRECT; -} - -static inline int is_statdata_le_key(int version, struct reiserfs_key *key) -{ - return le_key_k_type(version, key) == TYPE_STAT_DATA; -} - -/* item header has version. */ -static inline int is_direntry_le_ih(struct item_head *ih) -{ - return is_direntry_le_key(ih_version(ih), &ih->ih_key); -} - -static inline int is_direct_le_ih(struct item_head *ih) -{ - return is_direct_le_key(ih_version(ih), &ih->ih_key); -} - -static inline int is_indirect_le_ih(struct item_head *ih) -{ - return is_indirect_le_key(ih_version(ih), &ih->ih_key); -} - -static inline int is_statdata_le_ih(struct item_head *ih) -{ - return is_statdata_le_key(ih_version(ih), &ih->ih_key); -} - -/* key is pointer to cpu key, result is cpu */ -static inline loff_t cpu_key_k_offset(const struct cpu_key *key) -{ - return key->on_disk_key.k_offset; -} - -static inline loff_t cpu_key_k_type(const struct cpu_key *key) -{ - return key->on_disk_key.k_type; -} - -static inline void set_cpu_key_k_offset(struct cpu_key *key, loff_t offset) -{ - key->on_disk_key.k_offset = offset; -} - -static inline void set_cpu_key_k_type(struct cpu_key *key, int type) -{ - key->on_disk_key.k_type = type; -} - -static inline void cpu_key_k_offset_dec(struct cpu_key *key) -{ - key->on_disk_key.k_offset--; -} - -#define is_direntry_cpu_key(key) (cpu_key_k_type (key) == TYPE_DIRENTRY) -#define is_direct_cpu_key(key) (cpu_key_k_type (key) == TYPE_DIRECT) -#define is_indirect_cpu_key(key) (cpu_key_k_type (key) == TYPE_INDIRECT) -#define is_statdata_cpu_key(key) (cpu_key_k_type (key) == TYPE_STAT_DATA) - -/* are these used ? */ -#define is_direntry_cpu_ih(ih) (is_direntry_cpu_key (&((ih)->ih_key))) -#define is_direct_cpu_ih(ih) (is_direct_cpu_key (&((ih)->ih_key))) -#define is_indirect_cpu_ih(ih) (is_indirect_cpu_key (&((ih)->ih_key))) -#define is_statdata_cpu_ih(ih) (is_statdata_cpu_key (&((ih)->ih_key))) - -#define I_K_KEY_IN_ITEM(ih, key, n_blocksize) \ - (!COMP_SHORT_KEYS(ih, key) && \ - I_OFF_BYTE_IN_ITEM(ih, k_offset(key), n_blocksize)) - -/* maximal length of item */ -#define MAX_ITEM_LEN(block_size) (block_size - BLKH_SIZE - IH_SIZE) -#define MIN_ITEM_LEN 1 - -/* object identifier for root dir */ -#define REISERFS_ROOT_OBJECTID 2 -#define REISERFS_ROOT_PARENT_OBJECTID 1 - -extern struct reiserfs_key root_key; - -/* - * Picture represents a leaf of the S+tree - * ______________________________________________________ - * | | Array of | | | - * |Block | Object-Item | F r e e | Objects- | - * | head | Headers | S p a c e | Items | - * |______|_______________|___________________|___________| - */ - -/* - * Header of a disk block. More precisely, header of a formatted leaf - * or internal node, and not the header of an unformatted node. - */ -struct block_head { - __le16 blk_level; /* Level of a block in the tree. */ - __le16 blk_nr_item; /* Number of keys/items in a block. */ - __le16 blk_free_space; /* Block free space in bytes. */ - __le16 blk_reserved; - /* dump this in v4/planA */ - - /* kept only for compatibility */ - struct reiserfs_key blk_right_delim_key; -}; - -#define BLKH_SIZE (sizeof(struct block_head)) -#define blkh_level(p_blkh) (le16_to_cpu((p_blkh)->blk_level)) -#define blkh_nr_item(p_blkh) (le16_to_cpu((p_blkh)->blk_nr_item)) -#define blkh_free_space(p_blkh) (le16_to_cpu((p_blkh)->blk_free_space)) -#define blkh_reserved(p_blkh) (le16_to_cpu((p_blkh)->blk_reserved)) -#define set_blkh_level(p_blkh,val) ((p_blkh)->blk_level = cpu_to_le16(val)) -#define set_blkh_nr_item(p_blkh,val) ((p_blkh)->blk_nr_item = cpu_to_le16(val)) -#define set_blkh_free_space(p_blkh,val) ((p_blkh)->blk_free_space = cpu_to_le16(val)) -#define set_blkh_reserved(p_blkh,val) ((p_blkh)->blk_reserved = cpu_to_le16(val)) -#define blkh_right_delim_key(p_blkh) ((p_blkh)->blk_right_delim_key) -#define set_blkh_right_delim_key(p_blkh,val) ((p_blkh)->blk_right_delim_key = val) - -/* values for blk_level field of the struct block_head */ - -/* - * When node gets removed from the tree its blk_level is set to FREE_LEVEL. - * It is then used to see whether the node is still in the tree - */ -#define FREE_LEVEL 0 - -#define DISK_LEAF_NODE_LEVEL 1 /* Leaf node level. */ - -/* - * Given the buffer head of a formatted node, resolve to the - * block head of that node. - */ -#define B_BLK_HEAD(bh) ((struct block_head *)((bh)->b_data)) -/* Number of items that are in buffer. */ -#define B_NR_ITEMS(bh) (blkh_nr_item(B_BLK_HEAD(bh))) -#define B_LEVEL(bh) (blkh_level(B_BLK_HEAD(bh))) -#define B_FREE_SPACE(bh) (blkh_free_space(B_BLK_HEAD(bh))) - -#define PUT_B_NR_ITEMS(bh, val) do { set_blkh_nr_item(B_BLK_HEAD(bh), val); } while (0) -#define PUT_B_LEVEL(bh, val) do { set_blkh_level(B_BLK_HEAD(bh), val); } while (0) -#define PUT_B_FREE_SPACE(bh, val) do { set_blkh_free_space(B_BLK_HEAD(bh), val); } while (0) - -/* Get right delimiting key. -- little endian */ -#define B_PRIGHT_DELIM_KEY(bh) (&(blk_right_delim_key(B_BLK_HEAD(bh)))) - -/* Does the buffer contain a disk leaf. */ -#define B_IS_ITEMS_LEVEL(bh) (B_LEVEL(bh) == DISK_LEAF_NODE_LEVEL) - -/* Does the buffer contain a disk internal node */ -#define B_IS_KEYS_LEVEL(bh) (B_LEVEL(bh) > DISK_LEAF_NODE_LEVEL \ - && B_LEVEL(bh) <= MAX_HEIGHT) - -/*************************************************************************** - * STAT DATA * - ***************************************************************************/ - -/* - * old stat data is 32 bytes long. We are going to distinguish new one by - * different size -*/ -struct stat_data_v1 { - __le16 sd_mode; /* file type, permissions */ - __le16 sd_nlink; /* number of hard links */ - __le16 sd_uid; /* owner */ - __le16 sd_gid; /* group */ - __le32 sd_size; /* file size */ - __le32 sd_atime; /* time of last access */ - __le32 sd_mtime; /* time file was last modified */ - - /* - * time inode (stat data) was last changed - * (except changes to sd_atime and sd_mtime) - */ - __le32 sd_ctime; - union { - __le32 sd_rdev; - __le32 sd_blocks; /* number of blocks file uses */ - } __attribute__ ((__packed__)) u; - - /* - * first byte of file which is stored in a direct item: except that if - * it equals 1 it is a symlink and if it equals ~(__u32)0 there is no - * direct item. The existence of this field really grates on me. - * Let's replace it with a macro based on sd_size and our tail - * suppression policy. Someday. -Hans - */ - __le32 sd_first_direct_byte; -} __attribute__ ((__packed__)); - -#define SD_V1_SIZE (sizeof(struct stat_data_v1)) -#define stat_data_v1(ih) (ih_version (ih) == KEY_FORMAT_3_5) -#define sd_v1_mode(sdp) (le16_to_cpu((sdp)->sd_mode)) -#define set_sd_v1_mode(sdp,v) ((sdp)->sd_mode = cpu_to_le16(v)) -#define sd_v1_nlink(sdp) (le16_to_cpu((sdp)->sd_nlink)) -#define set_sd_v1_nlink(sdp,v) ((sdp)->sd_nlink = cpu_to_le16(v)) -#define sd_v1_uid(sdp) (le16_to_cpu((sdp)->sd_uid)) -#define set_sd_v1_uid(sdp,v) ((sdp)->sd_uid = cpu_to_le16(v)) -#define sd_v1_gid(sdp) (le16_to_cpu((sdp)->sd_gid)) -#define set_sd_v1_gid(sdp,v) ((sdp)->sd_gid = cpu_to_le16(v)) -#define sd_v1_size(sdp) (le32_to_cpu((sdp)->sd_size)) -#define set_sd_v1_size(sdp,v) ((sdp)->sd_size = cpu_to_le32(v)) -#define sd_v1_atime(sdp) (le32_to_cpu((sdp)->sd_atime)) -#define set_sd_v1_atime(sdp,v) ((sdp)->sd_atime = cpu_to_le32(v)) -#define sd_v1_mtime(sdp) (le32_to_cpu((sdp)->sd_mtime)) -#define set_sd_v1_mtime(sdp,v) ((sdp)->sd_mtime = cpu_to_le32(v)) -#define sd_v1_ctime(sdp) (le32_to_cpu((sdp)->sd_ctime)) -#define set_sd_v1_ctime(sdp,v) ((sdp)->sd_ctime = cpu_to_le32(v)) -#define sd_v1_rdev(sdp) (le32_to_cpu((sdp)->u.sd_rdev)) -#define set_sd_v1_rdev(sdp,v) ((sdp)->u.sd_rdev = cpu_to_le32(v)) -#define sd_v1_blocks(sdp) (le32_to_cpu((sdp)->u.sd_blocks)) -#define set_sd_v1_blocks(sdp,v) ((sdp)->u.sd_blocks = cpu_to_le32(v)) -#define sd_v1_first_direct_byte(sdp) \ - (le32_to_cpu((sdp)->sd_first_direct_byte)) -#define set_sd_v1_first_direct_byte(sdp,v) \ - ((sdp)->sd_first_direct_byte = cpu_to_le32(v)) - -/* inode flags stored in sd_attrs (nee sd_reserved) */ - -/* - * we want common flags to have the same values as in ext2, - * so chattr(1) will work without problems - */ -#define REISERFS_IMMUTABLE_FL FS_IMMUTABLE_FL -#define REISERFS_APPEND_FL FS_APPEND_FL -#define REISERFS_SYNC_FL FS_SYNC_FL -#define REISERFS_NOATIME_FL FS_NOATIME_FL -#define REISERFS_NODUMP_FL FS_NODUMP_FL -#define REISERFS_SECRM_FL FS_SECRM_FL -#define REISERFS_UNRM_FL FS_UNRM_FL -#define REISERFS_COMPR_FL FS_COMPR_FL -#define REISERFS_NOTAIL_FL FS_NOTAIL_FL - -/* persistent flags that file inherits from the parent directory */ -#define REISERFS_INHERIT_MASK ( REISERFS_IMMUTABLE_FL | \ - REISERFS_SYNC_FL | \ - REISERFS_NOATIME_FL | \ - REISERFS_NODUMP_FL | \ - REISERFS_SECRM_FL | \ - REISERFS_COMPR_FL | \ - REISERFS_NOTAIL_FL ) - -/* - * Stat Data on disk (reiserfs version of UFS disk inode minus the - * address blocks) - */ -struct stat_data { - __le16 sd_mode; /* file type, permissions */ - __le16 sd_attrs; /* persistent inode flags */ - __le32 sd_nlink; /* number of hard links */ - __le64 sd_size; /* file size */ - __le32 sd_uid; /* owner */ - __le32 sd_gid; /* group */ - __le32 sd_atime; /* time of last access */ - __le32 sd_mtime; /* time file was last modified */ - - /* - * time inode (stat data) was last changed - * (except changes to sd_atime and sd_mtime) - */ - __le32 sd_ctime; - __le32 sd_blocks; - union { - __le32 sd_rdev; - __le32 sd_generation; - } __attribute__ ((__packed__)) u; -} __attribute__ ((__packed__)); - -/* this is 44 bytes long */ -#define SD_SIZE (sizeof(struct stat_data)) -#define SD_V2_SIZE SD_SIZE -#define stat_data_v2(ih) (ih_version (ih) == KEY_FORMAT_3_6) -#define sd_v2_mode(sdp) (le16_to_cpu((sdp)->sd_mode)) -#define set_sd_v2_mode(sdp,v) ((sdp)->sd_mode = cpu_to_le16(v)) -/* sd_reserved */ -/* set_sd_reserved */ -#define sd_v2_nlink(sdp) (le32_to_cpu((sdp)->sd_nlink)) -#define set_sd_v2_nlink(sdp,v) ((sdp)->sd_nlink = cpu_to_le32(v)) -#define sd_v2_size(sdp) (le64_to_cpu((sdp)->sd_size)) -#define set_sd_v2_size(sdp,v) ((sdp)->sd_size = cpu_to_le64(v)) -#define sd_v2_uid(sdp) (le32_to_cpu((sdp)->sd_uid)) -#define set_sd_v2_uid(sdp,v) ((sdp)->sd_uid = cpu_to_le32(v)) -#define sd_v2_gid(sdp) (le32_to_cpu((sdp)->sd_gid)) -#define set_sd_v2_gid(sdp,v) ((sdp)->sd_gid = cpu_to_le32(v)) -#define sd_v2_atime(sdp) (le32_to_cpu((sdp)->sd_atime)) -#define set_sd_v2_atime(sdp,v) ((sdp)->sd_atime = cpu_to_le32(v)) -#define sd_v2_mtime(sdp) (le32_to_cpu((sdp)->sd_mtime)) -#define set_sd_v2_mtime(sdp,v) ((sdp)->sd_mtime = cpu_to_le32(v)) -#define sd_v2_ctime(sdp) (le32_to_cpu((sdp)->sd_ctime)) -#define set_sd_v2_ctime(sdp,v) ((sdp)->sd_ctime = cpu_to_le32(v)) -#define sd_v2_blocks(sdp) (le32_to_cpu((sdp)->sd_blocks)) -#define set_sd_v2_blocks(sdp,v) ((sdp)->sd_blocks = cpu_to_le32(v)) -#define sd_v2_rdev(sdp) (le32_to_cpu((sdp)->u.sd_rdev)) -#define set_sd_v2_rdev(sdp,v) ((sdp)->u.sd_rdev = cpu_to_le32(v)) -#define sd_v2_generation(sdp) (le32_to_cpu((sdp)->u.sd_generation)) -#define set_sd_v2_generation(sdp,v) ((sdp)->u.sd_generation = cpu_to_le32(v)) -#define sd_v2_attrs(sdp) (le16_to_cpu((sdp)->sd_attrs)) -#define set_sd_v2_attrs(sdp,v) ((sdp)->sd_attrs = cpu_to_le16(v)) - -/*************************************************************************** - * DIRECTORY STRUCTURE * - ***************************************************************************/ -/* - * Picture represents the structure of directory items - * ________________________________________________ - * | Array of | | | | | | - * | directory |N-1| N-2 | .... | 1st |0th| - * | entry headers | | | | | | - * |_______________|___|_____|________|_______|___| - * <---- directory entries ------> - * - * First directory item has k_offset component 1. We store "." and ".." - * in one item, always, we never split "." and ".." into differing - * items. This makes, among other things, the code for removing - * directories simpler. - */ -#define SD_OFFSET 0 -#define SD_UNIQUENESS 0 -#define DOT_OFFSET 1 -#define DOT_DOT_OFFSET 2 -#define DIRENTRY_UNIQUENESS 500 - -#define FIRST_ITEM_OFFSET 1 - -/* - * Q: How to get key of object pointed to by entry from entry? - * - * A: Each directory entry has its header. This header has deh_dir_id - * and deh_objectid fields, those are key of object, entry points to - */ - -/* - * NOT IMPLEMENTED: - * Directory will someday contain stat data of object - */ - -struct reiserfs_de_head { - __le32 deh_offset; /* third component of the directory entry key */ - - /* - * objectid of the parent directory of the object, that is referenced - * by directory entry - */ - __le32 deh_dir_id; - - /* objectid of the object, that is referenced by directory entry */ - __le32 deh_objectid; - __le16 deh_location; /* offset of name in the whole item */ - - /* - * whether 1) entry contains stat data (for future), and - * 2) whether entry is hidden (unlinked) - */ - __le16 deh_state; -} __attribute__ ((__packed__)); -#define DEH_SIZE sizeof(struct reiserfs_de_head) -#define deh_offset(p_deh) (le32_to_cpu((p_deh)->deh_offset)) -#define deh_dir_id(p_deh) (le32_to_cpu((p_deh)->deh_dir_id)) -#define deh_objectid(p_deh) (le32_to_cpu((p_deh)->deh_objectid)) -#define deh_location(p_deh) (le16_to_cpu((p_deh)->deh_location)) -#define deh_state(p_deh) (le16_to_cpu((p_deh)->deh_state)) - -#define put_deh_offset(p_deh,v) ((p_deh)->deh_offset = cpu_to_le32((v))) -#define put_deh_dir_id(p_deh,v) ((p_deh)->deh_dir_id = cpu_to_le32((v))) -#define put_deh_objectid(p_deh,v) ((p_deh)->deh_objectid = cpu_to_le32((v))) -#define put_deh_location(p_deh,v) ((p_deh)->deh_location = cpu_to_le16((v))) -#define put_deh_state(p_deh,v) ((p_deh)->deh_state = cpu_to_le16((v))) - -/* empty directory contains two entries "." and ".." and their headers */ -#define EMPTY_DIR_SIZE \ -(DEH_SIZE * 2 + ROUND_UP (sizeof(".") - 1) + ROUND_UP (sizeof("..") - 1)) - -/* old format directories have this size when empty */ -#define EMPTY_DIR_SIZE_V1 (DEH_SIZE * 2 + 3) - -#define DEH_Statdata 0 /* not used now */ -#define DEH_Visible 2 - -/* 64 bit systems (and the S/390) need to be aligned explicitly -jdm */ -#if BITS_PER_LONG == 64 || defined(__s390__) || defined(__hppa__) -# define ADDR_UNALIGNED_BITS (3) -#endif - -/* - * These are only used to manipulate deh_state. - * Because of this, we'll use the ext2_ bit routines, - * since they are little endian - */ -#ifdef ADDR_UNALIGNED_BITS - -# define aligned_address(addr) ((void *)((long)(addr) & ~((1UL << ADDR_UNALIGNED_BITS) - 1))) -# define unaligned_offset(addr) (((int)((long)(addr) & ((1 << ADDR_UNALIGNED_BITS) - 1))) << 3) - -# define set_bit_unaligned(nr, addr) \ - __test_and_set_bit_le((nr) + unaligned_offset(addr), aligned_address(addr)) -# define clear_bit_unaligned(nr, addr) \ - __test_and_clear_bit_le((nr) + unaligned_offset(addr), aligned_address(addr)) -# define test_bit_unaligned(nr, addr) \ - test_bit_le((nr) + unaligned_offset(addr), aligned_address(addr)) - -#else - -# define set_bit_unaligned(nr, addr) __test_and_set_bit_le(nr, addr) -# define clear_bit_unaligned(nr, addr) __test_and_clear_bit_le(nr, addr) -# define test_bit_unaligned(nr, addr) test_bit_le(nr, addr) - -#endif - -#define mark_de_with_sd(deh) set_bit_unaligned (DEH_Statdata, &((deh)->deh_state)) -#define mark_de_without_sd(deh) clear_bit_unaligned (DEH_Statdata, &((deh)->deh_state)) -#define mark_de_visible(deh) set_bit_unaligned (DEH_Visible, &((deh)->deh_state)) -#define mark_de_hidden(deh) clear_bit_unaligned (DEH_Visible, &((deh)->deh_state)) - -#define de_with_sd(deh) test_bit_unaligned (DEH_Statdata, &((deh)->deh_state)) -#define de_visible(deh) test_bit_unaligned (DEH_Visible, &((deh)->deh_state)) -#define de_hidden(deh) !test_bit_unaligned (DEH_Visible, &((deh)->deh_state)) - -extern void make_empty_dir_item_v1(char *body, __le32 dirid, __le32 objid, - __le32 par_dirid, __le32 par_objid); -extern void make_empty_dir_item(char *body, __le32 dirid, __le32 objid, - __le32 par_dirid, __le32 par_objid); - -/* two entries per block (at least) */ -#define REISERFS_MAX_NAME(block_size) 255 - -/* - * this structure is used for operations on directory entries. It is - * not a disk structure. - * - * When reiserfs_find_entry or search_by_entry_key find directory - * entry, they return filled reiserfs_dir_entry structure - */ -struct reiserfs_dir_entry { - struct buffer_head *de_bh; - int de_item_num; - struct item_head *de_ih; - int de_entry_num; - struct reiserfs_de_head *de_deh; - int de_entrylen; - int de_namelen; - char *de_name; - unsigned long *de_gen_number_bit_string; - - __u32 de_dir_id; - __u32 de_objectid; - - struct cpu_key de_entry_key; -}; - -/* - * these defines are useful when a particular member of - * a reiserfs_dir_entry is needed - */ - -/* pointer to file name, stored in entry */ -#define B_I_DEH_ENTRY_FILE_NAME(bh, ih, deh) \ - (ih_item_body(bh, ih) + deh_location(deh)) - -/* length of name */ -#define I_DEH_N_ENTRY_FILE_NAME_LENGTH(ih,deh,entry_num) \ -(I_DEH_N_ENTRY_LENGTH (ih, deh, entry_num) - (de_with_sd (deh) ? SD_SIZE : 0)) - -/* hash value occupies bits from 7 up to 30 */ -#define GET_HASH_VALUE(offset) ((offset) & 0x7fffff80LL) -/* generation number occupies 7 bits starting from 0 up to 6 */ -#define GET_GENERATION_NUMBER(offset) ((offset) & 0x7fLL) -#define MAX_GENERATION_NUMBER 127 - -#define SET_GENERATION_NUMBER(offset,gen_number) (GET_HASH_VALUE(offset)|(gen_number)) - -/* - * Picture represents an internal node of the reiserfs tree - * ______________________________________________________ - * | | Array of | Array of | Free | - * |block | keys | pointers | space | - * | head | N | N+1 | | - * |______|_______________|___________________|___________| - */ - -/*************************************************************************** - * DISK CHILD * - ***************************************************************************/ -/* - * Disk child pointer: - * The pointer from an internal node of the tree to a node that is on disk. - */ -struct disk_child { - __le32 dc_block_number; /* Disk child's block number. */ - __le16 dc_size; /* Disk child's used space. */ - __le16 dc_reserved; -}; - -#define DC_SIZE (sizeof(struct disk_child)) -#define dc_block_number(dc_p) (le32_to_cpu((dc_p)->dc_block_number)) -#define dc_size(dc_p) (le16_to_cpu((dc_p)->dc_size)) -#define put_dc_block_number(dc_p, val) do { (dc_p)->dc_block_number = cpu_to_le32(val); } while(0) -#define put_dc_size(dc_p, val) do { (dc_p)->dc_size = cpu_to_le16(val); } while(0) - -/* Get disk child by buffer header and position in the tree node. */ -#define B_N_CHILD(bh, n_pos) ((struct disk_child *)\ -((bh)->b_data + BLKH_SIZE + B_NR_ITEMS(bh) * KEY_SIZE + DC_SIZE * (n_pos))) - -/* Get disk child number by buffer header and position in the tree node. */ -#define B_N_CHILD_NUM(bh, n_pos) (dc_block_number(B_N_CHILD(bh, n_pos))) -#define PUT_B_N_CHILD_NUM(bh, n_pos, val) \ - (put_dc_block_number(B_N_CHILD(bh, n_pos), val)) - - /* maximal value of field child_size in structure disk_child */ - /* child size is the combined size of all items and their headers */ -#define MAX_CHILD_SIZE(bh) ((int)( (bh)->b_size - BLKH_SIZE )) - -/* amount of used space in buffer (not including block head) */ -#define B_CHILD_SIZE(cur) (MAX_CHILD_SIZE(cur)-(B_FREE_SPACE(cur))) - -/* max and min number of keys in internal node */ -#define MAX_NR_KEY(bh) ( (MAX_CHILD_SIZE(bh)-DC_SIZE)/(KEY_SIZE+DC_SIZE) ) -#define MIN_NR_KEY(bh) (MAX_NR_KEY(bh)/2) - -/*************************************************************************** - * PATH STRUCTURES AND DEFINES * - ***************************************************************************/ - -/* - * search_by_key fills up the path from the root to the leaf as it descends - * the tree looking for the key. It uses reiserfs_bread to try to find - * buffers in the cache given their block number. If it does not find - * them in the cache it reads them from disk. For each node search_by_key - * finds using reiserfs_bread it then uses bin_search to look through that - * node. bin_search will find the position of the block_number of the next - * node if it is looking through an internal node. If it is looking through - * a leaf node bin_search will find the position of the item which has key - * either equal to given key, or which is the maximal key less than the - * given key. - */ - -struct path_element { - /* Pointer to the buffer at the path in the tree. */ - struct buffer_head *pe_buffer; - /* Position in the tree node which is placed in the buffer above. */ - int pe_position; -}; - -/* - * maximal height of a tree. don't change this without - * changing JOURNAL_PER_BALANCE_CNT - */ -#define MAX_HEIGHT 5 - -/* Must be equals MAX_HEIGHT + FIRST_PATH_ELEMENT_OFFSET */ -#define EXTENDED_MAX_HEIGHT 7 - -/* Must be equal to at least 2. */ -#define FIRST_PATH_ELEMENT_OFFSET 2 - -/* Must be equal to FIRST_PATH_ELEMENT_OFFSET - 1 */ -#define ILLEGAL_PATH_ELEMENT_OFFSET 1 - -/* this MUST be MAX_HEIGHT + 1. See about FEB below */ -#define MAX_FEB_SIZE 6 - -/* - * We need to keep track of who the ancestors of nodes are. When we - * perform a search we record which nodes were visited while - * descending the tree looking for the node we searched for. This list - * of nodes is called the path. This information is used while - * performing balancing. Note that this path information may become - * invalid, and this means we must check it when using it to see if it - * is still valid. You'll need to read search_by_key and the comments - * in it, especially about decrement_counters_in_path(), to understand - * this structure. - * - * Paths make the code so much harder to work with and debug.... An - * enormous number of bugs are due to them, and trying to write or modify - * code that uses them just makes my head hurt. They are based on an - * excessive effort to avoid disturbing the precious VFS code.:-( The - * gods only know how we are going to SMP the code that uses them. - * znodes are the way! - */ - -#define PATH_READA 0x1 /* do read ahead */ -#define PATH_READA_BACK 0x2 /* read backwards */ - -struct treepath { - int path_length; /* Length of the array above. */ - int reada; - /* Array of the path elements. */ - struct path_element path_elements[EXTENDED_MAX_HEIGHT]; - int pos_in_item; -}; - -#define pos_in_item(path) ((path)->pos_in_item) - -#define INITIALIZE_PATH(var) \ -struct treepath var = {.path_length = ILLEGAL_PATH_ELEMENT_OFFSET, .reada = 0,} - -/* Get path element by path and path position. */ -#define PATH_OFFSET_PELEMENT(path, n_offset) ((path)->path_elements + (n_offset)) - -/* Get buffer header at the path by path and path position. */ -#define PATH_OFFSET_PBUFFER(path, n_offset) (PATH_OFFSET_PELEMENT(path, n_offset)->pe_buffer) - -/* Get position in the element at the path by path and path position. */ -#define PATH_OFFSET_POSITION(path, n_offset) (PATH_OFFSET_PELEMENT(path, n_offset)->pe_position) - -#define PATH_PLAST_BUFFER(path) (PATH_OFFSET_PBUFFER((path), (path)->path_length)) - -/* - * you know, to the person who didn't write this the macro name does not - * at first suggest what it does. Maybe POSITION_FROM_PATH_END? Or - * maybe we should just focus on dumping paths... -Hans - */ -#define PATH_LAST_POSITION(path) (PATH_OFFSET_POSITION((path), (path)->path_length)) - -/* - * in do_balance leaf has h == 0 in contrast with path structure, - * where root has level == 0. That is why we need these defines - */ - -/* tb->S[h] */ -#define PATH_H_PBUFFER(path, h) \ - PATH_OFFSET_PBUFFER(path, path->path_length - (h)) - -/* tb->F[h] or tb->S[0]->b_parent */ -#define PATH_H_PPARENT(path, h) PATH_H_PBUFFER(path, (h) + 1) - -#define PATH_H_POSITION(path, h) \ - PATH_OFFSET_POSITION(path, path->path_length - (h)) - -/* tb->S[h]->b_item_order */ -#define PATH_H_B_ITEM_ORDER(path, h) PATH_H_POSITION(path, h + 1) - -#define PATH_H_PATH_OFFSET(path, n_h) ((path)->path_length - (n_h)) - -static inline void *reiserfs_node_data(const struct buffer_head *bh) -{ - return bh->b_data + sizeof(struct block_head); -} - -/* get key from internal node */ -static inline struct reiserfs_key *internal_key(struct buffer_head *bh, - int item_num) -{ - struct reiserfs_key *key = reiserfs_node_data(bh); - - return &key[item_num]; -} - -/* get the item header from leaf node */ -static inline struct item_head *item_head(const struct buffer_head *bh, - int item_num) -{ - struct item_head *ih = reiserfs_node_data(bh); - - return &ih[item_num]; -} - -/* get the key from leaf node */ -static inline struct reiserfs_key *leaf_key(const struct buffer_head *bh, - int item_num) -{ - return &item_head(bh, item_num)->ih_key; -} - -static inline void *ih_item_body(const struct buffer_head *bh, - const struct item_head *ih) -{ - return bh->b_data + ih_location(ih); -} - -/* get item body from leaf node */ -static inline void *item_body(const struct buffer_head *bh, int item_num) -{ - return ih_item_body(bh, item_head(bh, item_num)); -} - -static inline struct item_head *tp_item_head(const struct treepath *path) -{ - return item_head(PATH_PLAST_BUFFER(path), PATH_LAST_POSITION(path)); -} - -static inline void *tp_item_body(const struct treepath *path) -{ - return item_body(PATH_PLAST_BUFFER(path), PATH_LAST_POSITION(path)); -} - -#define get_last_bh(path) PATH_PLAST_BUFFER(path) -#define get_item_pos(path) PATH_LAST_POSITION(path) -#define item_moved(ih,path) comp_items(ih, path) -#define path_changed(ih,path) comp_items (ih, path) - -/* array of the entry headers */ - /* get item body */ -#define B_I_DEH(bh, ih) ((struct reiserfs_de_head *)(ih_item_body(bh, ih))) - -/* - * length of the directory entry in directory item. This define - * calculates length of i-th directory entry using directory entry - * locations from dir entry head. When it calculates length of 0-th - * directory entry, it uses length of whole item in place of entry - * location of the non-existent following entry in the calculation. - * See picture above. - */ -static inline int entry_length(const struct buffer_head *bh, - const struct item_head *ih, int pos_in_item) -{ - struct reiserfs_de_head *deh; - - deh = B_I_DEH(bh, ih) + pos_in_item; - if (pos_in_item) - return deh_location(deh - 1) - deh_location(deh); - - return ih_item_len(ih) - deh_location(deh); -} - -/*************************************************************************** - * MISC * - ***************************************************************************/ - -/* Size of pointer to the unformatted node. */ -#define UNFM_P_SIZE (sizeof(unp_t)) -#define UNFM_P_SHIFT 2 - -/* in in-core inode key is stored on le form */ -#define INODE_PKEY(inode) ((struct reiserfs_key *)(REISERFS_I(inode)->i_key)) - -#define MAX_UL_INT 0xffffffff -#define MAX_INT 0x7ffffff -#define MAX_US_INT 0xffff - -// reiserfs version 2 has max offset 60 bits. Version 1 - 32 bit offset -static inline loff_t max_reiserfs_offset(struct inode *inode) -{ - if (get_inode_item_key_version(inode) == KEY_FORMAT_3_5) - return (loff_t) U32_MAX; - - return (loff_t) ((~(__u64) 0) >> 4); -} - -#define MAX_KEY_OBJECTID MAX_UL_INT - -#define MAX_B_NUM MAX_UL_INT -#define MAX_FC_NUM MAX_US_INT - -/* the purpose is to detect overflow of an unsigned short */ -#define REISERFS_LINK_MAX (MAX_US_INT - 1000) - -/* - * The following defines are used in reiserfs_insert_item - * and reiserfs_append_item - */ -#define REISERFS_KERNEL_MEM 0 /* kernel memory mode */ -#define REISERFS_USER_MEM 1 /* user memory mode */ - -#define fs_generation(s) (REISERFS_SB(s)->s_generation_counter) -#define get_generation(s) atomic_read (&fs_generation(s)) -#define FILESYSTEM_CHANGED_TB(tb) (get_generation((tb)->tb_sb) != (tb)->fs_gen) -#define __fs_changed(gen,s) (gen != get_generation (s)) -#define fs_changed(gen,s) \ -({ \ - reiserfs_cond_resched(s); \ - __fs_changed(gen, s); \ -}) - -/*************************************************************************** - * FIXATE NODES * - ***************************************************************************/ - -#define VI_TYPE_LEFT_MERGEABLE 1 -#define VI_TYPE_RIGHT_MERGEABLE 2 - -/* - * To make any changes in the tree we always first find node, that - * contains item to be changed/deleted or place to insert a new - * item. We call this node S. To do balancing we need to decide what - * we will shift to left/right neighbor, or to a new node, where new - * item will be etc. To make this analysis simpler we build virtual - * node. Virtual node is an array of items, that will replace items of - * node S. (For instance if we are going to delete an item, virtual - * node does not contain it). Virtual node keeps information about - * item sizes and types, mergeability of first and last items, sizes - * of all entries in directory item. We use this array of items when - * calculating what we can shift to neighbors and how many nodes we - * have to have if we do not any shiftings, if we shift to left/right - * neighbor or to both. - */ -struct virtual_item { - int vi_index; /* index in the array of item operations */ - unsigned short vi_type; /* left/right mergeability */ - - /* length of item that it will have after balancing */ - unsigned short vi_item_len; - - struct item_head *vi_ih; - const char *vi_item; /* body of item (old or new) */ - const void *vi_new_data; /* 0 always but paste mode */ - void *vi_uarea; /* item specific area */ -}; - -struct virtual_node { - /* this is a pointer to the free space in the buffer */ - char *vn_free_ptr; - - unsigned short vn_nr_item; /* number of items in virtual node */ - - /* - * size of node , that node would have if it has - * unlimited size and no balancing is performed - */ - short vn_size; - - /* mode of balancing (paste, insert, delete, cut) */ - short vn_mode; - - short vn_affected_item_num; - short vn_pos_in_item; - - /* item header of inserted item, 0 for other modes */ - struct item_head *vn_ins_ih; - const void *vn_data; - - /* array of items (including a new one, excluding item to be deleted) */ - struct virtual_item *vn_vi; -}; - -/* used by directory items when creating virtual nodes */ -struct direntry_uarea { - int flags; - __u16 entry_count; - __u16 entry_sizes[]; -} __attribute__ ((__packed__)); - -/*************************************************************************** - * TREE BALANCE * - ***************************************************************************/ - -/* - * This temporary structure is used in tree balance algorithms, and - * constructed as we go to the extent that its various parts are - * needed. It contains arrays of nodes that can potentially be - * involved in the balancing of node S, and parameters that define how - * each of the nodes must be balanced. Note that in these algorithms - * for balancing the worst case is to need to balance the current node - * S and the left and right neighbors and all of their parents plus - * create a new node. We implement S1 balancing for the leaf nodes - * and S0 balancing for the internal nodes (S1 and S0 are defined in - * our papers.) - */ - -/* size of the array of buffers to free at end of do_balance */ -#define MAX_FREE_BLOCK 7 - -/* maximum number of FEB blocknrs on a single level */ -#define MAX_AMOUNT_NEEDED 2 - -/* someday somebody will prefix every field in this struct with tb_ */ -struct tree_balance { - int tb_mode; - int need_balance_dirty; - struct super_block *tb_sb; - struct reiserfs_transaction_handle *transaction_handle; - struct treepath *tb_path; - - /* array of left neighbors of nodes in the path */ - struct buffer_head *L[MAX_HEIGHT]; - - /* array of right neighbors of nodes in the path */ - struct buffer_head *R[MAX_HEIGHT]; - - /* array of fathers of the left neighbors */ - struct buffer_head *FL[MAX_HEIGHT]; - - /* array of fathers of the right neighbors */ - struct buffer_head *FR[MAX_HEIGHT]; - /* array of common parents of center node and its left neighbor */ - struct buffer_head *CFL[MAX_HEIGHT]; - - /* array of common parents of center node and its right neighbor */ - struct buffer_head *CFR[MAX_HEIGHT]; - - /* - * array of empty buffers. Number of buffers in array equals - * cur_blknum. - */ - struct buffer_head *FEB[MAX_FEB_SIZE]; - struct buffer_head *used[MAX_FEB_SIZE]; - struct buffer_head *thrown[MAX_FEB_SIZE]; - - /* - * array of number of items which must be shifted to the left in - * order to balance the current node; for leaves includes item that - * will be partially shifted; for internal nodes, it is the number - * of child pointers rather than items. It includes the new item - * being created. The code sometimes subtracts one to get the - * number of wholly shifted items for other purposes. - */ - int lnum[MAX_HEIGHT]; - - /* substitute right for left in comment above */ - int rnum[MAX_HEIGHT]; - - /* - * array indexed by height h mapping the key delimiting L[h] and - * S[h] to its item number within the node CFL[h] - */ - int lkey[MAX_HEIGHT]; - - /* substitute r for l in comment above */ - int rkey[MAX_HEIGHT]; - - /* - * the number of bytes by we are trying to add or remove from - * S[h]. A negative value means removing. - */ - int insert_size[MAX_HEIGHT]; - - /* - * number of nodes that will replace node S[h] after balancing - * on the level h of the tree. If 0 then S is being deleted, - * if 1 then S is remaining and no new nodes are being created, - * if 2 or 3 then 1 or 2 new nodes is being created - */ - int blknum[MAX_HEIGHT]; - - /* fields that are used only for balancing leaves of the tree */ - - /* number of empty blocks having been already allocated */ - int cur_blknum; - - /* number of items that fall into left most node when S[0] splits */ - int s0num; - - /* - * number of bytes which can flow to the left neighbor from the left - * most liquid item that cannot be shifted from S[0] entirely - * if -1 then nothing will be partially shifted - */ - int lbytes; - - /* - * number of bytes which will flow to the right neighbor from the right - * most liquid item that cannot be shifted from S[0] entirely - * if -1 then nothing will be partially shifted - */ - int rbytes; - - - /* - * index into the array of item headers in - * S[0] of the affected item - */ - int item_pos; - - /* new nodes allocated to hold what could not fit into S */ - struct buffer_head *S_new[2]; - - /* - * number of items that will be placed into nodes in S_new - * when S[0] splits - */ - int snum[2]; - - /* - * number of bytes which flow to nodes in S_new when S[0] splits - * note: if S[0] splits into 3 nodes, then items do not need to be cut - */ - int sbytes[2]; - - int pos_in_item; - int zeroes_num; - - /* - * buffers which are to be freed after do_balance finishes - * by unfix_nodes - */ - struct buffer_head *buf_to_free[MAX_FREE_BLOCK]; - - /* - * kmalloced memory. Used to create virtual node and keep - * map of dirtied bitmap blocks - */ - char *vn_buf; - - int vn_buf_size; /* size of the vn_buf */ - - /* VN starts after bitmap of bitmap blocks */ - struct virtual_node *tb_vn; - - /* - * saved value of `reiserfs_generation' counter see - * FILESYSTEM_CHANGED() macro in reiserfs_fs.h - */ - int fs_gen; - -#ifdef DISPLACE_NEW_PACKING_LOCALITIES - /* - * key pointer, to pass to block allocator or - * another low-level subsystem - */ - struct in_core_key key; -#endif -}; - -/* These are modes of balancing */ - -/* When inserting an item. */ -#define M_INSERT 'i' -/* - * When inserting into (directories only) or appending onto an already - * existent item. - */ -#define M_PASTE 'p' -/* When deleting an item. */ -#define M_DELETE 'd' -/* When truncating an item or removing an entry from a (directory) item. */ -#define M_CUT 'c' - -/* used when balancing on leaf level skipped (in reiserfsck) */ -#define M_INTERNAL 'n' - -/* - * When further balancing is not needed, then do_balance does not need - * to be called. - */ -#define M_SKIP_BALANCING 's' -#define M_CONVERT 'v' - -/* modes of leaf_move_items */ -#define LEAF_FROM_S_TO_L 0 -#define LEAF_FROM_S_TO_R 1 -#define LEAF_FROM_R_TO_L 2 -#define LEAF_FROM_L_TO_R 3 -#define LEAF_FROM_S_TO_SNEW 4 - -#define FIRST_TO_LAST 0 -#define LAST_TO_FIRST 1 - -/* - * used in do_balance for passing parent of node information that has - * been gotten from tb struct - */ -struct buffer_info { - struct tree_balance *tb; - struct buffer_head *bi_bh; - struct buffer_head *bi_parent; - int bi_position; -}; - -static inline struct super_block *sb_from_tb(struct tree_balance *tb) -{ - return tb ? tb->tb_sb : NULL; -} - -static inline struct super_block *sb_from_bi(struct buffer_info *bi) -{ - return bi ? sb_from_tb(bi->tb) : NULL; -} - -/* - * there are 4 types of items: stat data, directory item, indirect, direct. - * +-------------------+------------+--------------+------------+ - * | | k_offset | k_uniqueness | mergeable? | - * +-------------------+------------+--------------+------------+ - * | stat data | 0 | 0 | no | - * +-------------------+------------+--------------+------------+ - * | 1st directory item| DOT_OFFSET | DIRENTRY_ .. | no | - * | non 1st directory | hash value | UNIQUENESS | yes | - * | item | | | | - * +-------------------+------------+--------------+------------+ - * | indirect item | offset + 1 |TYPE_INDIRECT | [1] | - * +-------------------+------------+--------------+------------+ - * | direct item | offset + 1 |TYPE_DIRECT | [2] | - * +-------------------+------------+--------------+------------+ - * - * [1] if this is not the first indirect item of the object - * [2] if this is not the first direct item of the object -*/ - -struct item_operations { - int (*bytes_number) (struct item_head * ih, int block_size); - void (*decrement_key) (struct cpu_key *); - int (*is_left_mergeable) (struct reiserfs_key * ih, - unsigned long bsize); - void (*print_item) (struct item_head *, char *item); - void (*check_item) (struct item_head *, char *item); - - int (*create_vi) (struct virtual_node * vn, struct virtual_item * vi, - int is_affected, int insert_size); - int (*check_left) (struct virtual_item * vi, int free, - int start_skip, int end_skip); - int (*check_right) (struct virtual_item * vi, int free); - int (*part_size) (struct virtual_item * vi, int from, int to); - int (*unit_num) (struct virtual_item * vi); - void (*print_vi) (struct virtual_item * vi); -}; - -extern struct item_operations *item_ops[TYPE_ANY + 1]; - -#define op_bytes_number(ih,bsize) item_ops[le_ih_k_type (ih)]->bytes_number (ih, bsize) -#define op_is_left_mergeable(key,bsize) item_ops[le_key_k_type (le_key_version (key), key)]->is_left_mergeable (key, bsize) -#define op_print_item(ih,item) item_ops[le_ih_k_type (ih)]->print_item (ih, item) -#define op_check_item(ih,item) item_ops[le_ih_k_type (ih)]->check_item (ih, item) -#define op_create_vi(vn,vi,is_affected,insert_size) item_ops[le_ih_k_type ((vi)->vi_ih)]->create_vi (vn,vi,is_affected,insert_size) -#define op_check_left(vi,free,start_skip,end_skip) item_ops[(vi)->vi_index]->check_left (vi, free, start_skip, end_skip) -#define op_check_right(vi,free) item_ops[(vi)->vi_index]->check_right (vi, free) -#define op_part_size(vi,from,to) item_ops[(vi)->vi_index]->part_size (vi, from, to) -#define op_unit_num(vi) item_ops[(vi)->vi_index]->unit_num (vi) -#define op_print_vi(vi) item_ops[(vi)->vi_index]->print_vi (vi) - -#define COMP_SHORT_KEYS comp_short_keys - -/* number of blocks pointed to by the indirect item */ -#define I_UNFM_NUM(ih) (ih_item_len(ih) / UNFM_P_SIZE) - -/* - * the used space within the unformatted node corresponding - * to pos within the item pointed to by ih - */ -#define I_POS_UNFM_SIZE(ih,pos,size) (((pos) == I_UNFM_NUM(ih) - 1 ) ? (size) - ih_free_space(ih) : (size)) - -/* - * number of bytes contained by the direct item or the - * unformatted nodes the indirect item points to - */ - -/* following defines use reiserfs buffer header and item header */ - -/* get stat-data */ -#define B_I_STAT_DATA(bh, ih) ( (struct stat_data * )((bh)->b_data + ih_location(ih)) ) - -/* this is 3976 for size==4096 */ -#define MAX_DIRECT_ITEM_LEN(size) ((size) - BLKH_SIZE - 2*IH_SIZE - SD_SIZE - UNFM_P_SIZE) - -/* - * indirect items consist of entries which contain blocknrs, pos - * indicates which entry, and B_I_POS_UNFM_POINTER resolves to the - * blocknr contained by the entry pos points to - */ -#define B_I_POS_UNFM_POINTER(bh, ih, pos) \ - le32_to_cpu(*(((unp_t *)ih_item_body(bh, ih)) + (pos))) -#define PUT_B_I_POS_UNFM_POINTER(bh, ih, pos, val) \ - (*(((unp_t *)ih_item_body(bh, ih)) + (pos)) = cpu_to_le32(val)) - -struct reiserfs_iget_args { - __u32 objectid; - __u32 dirid; -}; - -/*************************************************************************** - * FUNCTION DECLARATIONS * - ***************************************************************************/ - -#define get_journal_desc_magic(bh) (bh->b_data + bh->b_size - 12) - -#define journal_trans_half(blocksize) \ - ((blocksize - sizeof(struct reiserfs_journal_desc) - 12) / sizeof(__u32)) - -/* journal.c see journal.c for all the comments here */ - -/* first block written in a commit. */ -struct reiserfs_journal_desc { - __le32 j_trans_id; /* id of commit */ - - /* length of commit. len +1 is the commit block */ - __le32 j_len; - - __le32 j_mount_id; /* mount id of this trans */ - __le32 j_realblock[]; /* real locations for each block */ -}; - -#define get_desc_trans_id(d) le32_to_cpu((d)->j_trans_id) -#define get_desc_trans_len(d) le32_to_cpu((d)->j_len) -#define get_desc_mount_id(d) le32_to_cpu((d)->j_mount_id) - -#define set_desc_trans_id(d,val) do { (d)->j_trans_id = cpu_to_le32 (val); } while (0) -#define set_desc_trans_len(d,val) do { (d)->j_len = cpu_to_le32 (val); } while (0) -#define set_desc_mount_id(d,val) do { (d)->j_mount_id = cpu_to_le32 (val); } while (0) - -/* last block written in a commit */ -struct reiserfs_journal_commit { - __le32 j_trans_id; /* must match j_trans_id from the desc block */ - __le32 j_len; /* ditto */ - __le32 j_realblock[]; /* real locations for each block */ -}; - -#define get_commit_trans_id(c) le32_to_cpu((c)->j_trans_id) -#define get_commit_trans_len(c) le32_to_cpu((c)->j_len) -#define get_commit_mount_id(c) le32_to_cpu((c)->j_mount_id) - -#define set_commit_trans_id(c,val) do { (c)->j_trans_id = cpu_to_le32 (val); } while (0) -#define set_commit_trans_len(c,val) do { (c)->j_len = cpu_to_le32 (val); } while (0) - -/* - * this header block gets written whenever a transaction is considered - * fully flushed, and is more recent than the last fully flushed transaction. - * fully flushed means all the log blocks and all the real blocks are on - * disk, and this transaction does not need to be replayed. - */ -struct reiserfs_journal_header { - /* id of last fully flushed transaction */ - __le32 j_last_flush_trans_id; - - /* offset in the log of where to start replay after a crash */ - __le32 j_first_unflushed_offset; - - __le32 j_mount_id; - /* 12 */ struct journal_params jh_journal; -}; - -/* biggest tunable defines are right here */ -#define JOURNAL_BLOCK_COUNT 8192 /* number of blocks in the journal */ - -/* biggest possible single transaction, don't change for now (8/3/99) */ -#define JOURNAL_TRANS_MAX_DEFAULT 1024 -#define JOURNAL_TRANS_MIN_DEFAULT 256 - -/* - * max blocks to batch into one transaction, - * don't make this any bigger than 900 - */ -#define JOURNAL_MAX_BATCH_DEFAULT 900 -#define JOURNAL_MIN_RATIO 2 -#define JOURNAL_MAX_COMMIT_AGE 30 -#define JOURNAL_MAX_TRANS_AGE 30 -#define JOURNAL_PER_BALANCE_CNT (3 * (MAX_HEIGHT-2) + 9) -#define JOURNAL_BLOCKS_PER_OBJECT(sb) (JOURNAL_PER_BALANCE_CNT * 3 + \ - 2 * (REISERFS_QUOTA_INIT_BLOCKS(sb) + \ - REISERFS_QUOTA_TRANS_BLOCKS(sb))) - -#ifdef CONFIG_QUOTA -#define REISERFS_QUOTA_OPTS ((1 << REISERFS_USRQUOTA) | (1 << REISERFS_GRPQUOTA)) -/* We need to update data and inode (atime) */ -#define REISERFS_QUOTA_TRANS_BLOCKS(s) (REISERFS_SB(s)->s_mount_opt & REISERFS_QUOTA_OPTS ? 2 : 0) -/* 1 balancing, 1 bitmap, 1 data per write + stat data update */ -#define REISERFS_QUOTA_INIT_BLOCKS(s) (REISERFS_SB(s)->s_mount_opt & REISERFS_QUOTA_OPTS ? \ -(DQUOT_INIT_ALLOC*(JOURNAL_PER_BALANCE_CNT+2)+DQUOT_INIT_REWRITE+1) : 0) -/* same as with INIT */ -#define REISERFS_QUOTA_DEL_BLOCKS(s) (REISERFS_SB(s)->s_mount_opt & REISERFS_QUOTA_OPTS ? \ -(DQUOT_DEL_ALLOC*(JOURNAL_PER_BALANCE_CNT+2)+DQUOT_DEL_REWRITE+1) : 0) -#else -#define REISERFS_QUOTA_TRANS_BLOCKS(s) 0 -#define REISERFS_QUOTA_INIT_BLOCKS(s) 0 -#define REISERFS_QUOTA_DEL_BLOCKS(s) 0 -#endif - -/* - * both of these can be as low as 1, or as high as you want. The min is the - * number of 4k bitmap nodes preallocated on mount. New nodes are allocated - * as needed, and released when transactions are committed. On release, if - * the current number of nodes is > max, the node is freed, otherwise, - * it is put on a free list for faster use later. -*/ -#define REISERFS_MIN_BITMAP_NODES 10 -#define REISERFS_MAX_BITMAP_NODES 100 - -/* these are based on journal hash size of 8192 */ -#define JBH_HASH_SHIFT 13 -#define JBH_HASH_MASK 8191 - -#define _jhashfn(sb,block) \ - (((unsigned long)sb>>L1_CACHE_SHIFT) ^ \ - (((block)<<(JBH_HASH_SHIFT - 6)) ^ ((block) >> 13) ^ ((block) << (JBH_HASH_SHIFT - 12)))) -#define journal_hash(t,sb,block) ((t)[_jhashfn((sb),(block)) & JBH_HASH_MASK]) - -/* We need these to make journal.c code more readable */ -#define journal_find_get_block(s, block) __find_get_block(\ - file_bdev(SB_JOURNAL(s)->j_bdev_file), block, s->s_blocksize) -#define journal_getblk(s, block) __getblk(file_bdev(SB_JOURNAL(s)->j_bdev_file),\ - block, s->s_blocksize) -#define journal_bread(s, block) __bread(file_bdev(SB_JOURNAL(s)->j_bdev_file),\ - block, s->s_blocksize) - -enum reiserfs_bh_state_bits { - BH_JDirty = BH_PrivateStart, /* buffer is in current transaction */ - BH_JDirty_wait, - /* - * disk block was taken off free list before being in a - * finished transaction, or written to disk. Can be reused immed. - */ - BH_JNew, - BH_JPrepared, - BH_JRestore_dirty, - BH_JTest, /* debugging only will go away */ -}; - -BUFFER_FNS(JDirty, journaled); -TAS_BUFFER_FNS(JDirty, journaled); -BUFFER_FNS(JDirty_wait, journal_dirty); -TAS_BUFFER_FNS(JDirty_wait, journal_dirty); -BUFFER_FNS(JNew, journal_new); -TAS_BUFFER_FNS(JNew, journal_new); -BUFFER_FNS(JPrepared, journal_prepared); -TAS_BUFFER_FNS(JPrepared, journal_prepared); -BUFFER_FNS(JRestore_dirty, journal_restore_dirty); -TAS_BUFFER_FNS(JRestore_dirty, journal_restore_dirty); -BUFFER_FNS(JTest, journal_test); -TAS_BUFFER_FNS(JTest, journal_test); - -/* transaction handle which is passed around for all journal calls */ -struct reiserfs_transaction_handle { - /* - * super for this FS when journal_begin was called. saves calls to - * reiserfs_get_super also used by nested transactions to make - * sure they are nesting on the right FS _must_ be first - * in the handle - */ - struct super_block *t_super; - - int t_refcount; - int t_blocks_logged; /* number of blocks this writer has logged */ - int t_blocks_allocated; /* number of blocks this writer allocated */ - - /* sanity check, equals the current trans id */ - unsigned int t_trans_id; - - void *t_handle_save; /* save existing current->journal_info */ - - /* - * if new block allocation occurres, that block - * should be displaced from others - */ - unsigned displace_new_blocks:1; - - struct list_head t_list; -}; - -/* - * used to keep track of ordered and tail writes, attached to the buffer - * head through b_journal_head. - */ -struct reiserfs_jh { - struct reiserfs_journal_list *jl; - struct buffer_head *bh; - struct list_head list; -}; - -void reiserfs_free_jh(struct buffer_head *bh); -int reiserfs_add_tail_list(struct inode *inode, struct buffer_head *bh); -int reiserfs_add_ordered_list(struct inode *inode, struct buffer_head *bh); -int journal_mark_dirty(struct reiserfs_transaction_handle *, - struct buffer_head *bh); - -static inline int reiserfs_file_data_log(struct inode *inode) -{ - if (reiserfs_data_log(inode->i_sb) || - (REISERFS_I(inode)->i_flags & i_data_log)) - return 1; - return 0; -} - -static inline int reiserfs_transaction_running(struct super_block *s) -{ - struct reiserfs_transaction_handle *th = current->journal_info; - if (th && th->t_super == s) - return 1; - if (th && th->t_super == NULL) - BUG(); - return 0; -} - -static inline int reiserfs_transaction_free_space(struct reiserfs_transaction_handle *th) -{ - return th->t_blocks_allocated - th->t_blocks_logged; -} - -struct reiserfs_transaction_handle *reiserfs_persistent_transaction(struct - super_block - *, - int count); -int reiserfs_end_persistent_transaction(struct reiserfs_transaction_handle *); -void reiserfs_vfs_truncate_file(struct inode *inode); -int reiserfs_commit_page(struct inode *inode, struct page *page, - unsigned from, unsigned to); -void reiserfs_flush_old_commits(struct super_block *); -int reiserfs_commit_for_inode(struct inode *); -int reiserfs_inode_needs_commit(struct inode *); -void reiserfs_update_inode_transaction(struct inode *); -void reiserfs_wait_on_write_block(struct super_block *s); -void reiserfs_block_writes(struct reiserfs_transaction_handle *th); -void reiserfs_allow_writes(struct super_block *s); -void reiserfs_check_lock_depth(struct super_block *s, char *caller); -int reiserfs_prepare_for_journal(struct super_block *, struct buffer_head *bh, - int wait); -void reiserfs_restore_prepared_buffer(struct super_block *, - struct buffer_head *bh); -int journal_init(struct super_block *, const char *j_dev_name, int old_format, - unsigned int); -int journal_release(struct reiserfs_transaction_handle *, struct super_block *); -int journal_release_error(struct reiserfs_transaction_handle *, - struct super_block *); -int journal_end(struct reiserfs_transaction_handle *); -int journal_end_sync(struct reiserfs_transaction_handle *); -int journal_mark_freed(struct reiserfs_transaction_handle *, - struct super_block *, b_blocknr_t blocknr); -int journal_transaction_should_end(struct reiserfs_transaction_handle *, int); -int reiserfs_in_journal(struct super_block *sb, unsigned int bmap_nr, - int bit_nr, int searchall, b_blocknr_t *next); -int journal_begin(struct reiserfs_transaction_handle *, - struct super_block *sb, unsigned long); -int journal_join_abort(struct reiserfs_transaction_handle *, - struct super_block *sb); -void reiserfs_abort_journal(struct super_block *sb, int errno); -void reiserfs_abort(struct super_block *sb, int errno, const char *fmt, ...); -int reiserfs_allocate_list_bitmaps(struct super_block *s, - struct reiserfs_list_bitmap *, unsigned int); - -void reiserfs_schedule_old_flush(struct super_block *s); -void reiserfs_cancel_old_flush(struct super_block *s); -void add_save_link(struct reiserfs_transaction_handle *th, - struct inode *inode, int truncate); -int remove_save_link(struct inode *inode, int truncate); - -/* objectid.c */ -__u32 reiserfs_get_unused_objectid(struct reiserfs_transaction_handle *th); -void reiserfs_release_objectid(struct reiserfs_transaction_handle *th, - __u32 objectid_to_release); -int reiserfs_convert_objectid_map_v1(struct super_block *); - -/* stree.c */ -int B_IS_IN_TREE(const struct buffer_head *); -extern void copy_item_head(struct item_head *to, - const struct item_head *from); - -/* first key is in cpu form, second - le */ -extern int comp_short_keys(const struct reiserfs_key *le_key, - const struct cpu_key *cpu_key); -extern void le_key2cpu_key(struct cpu_key *to, const struct reiserfs_key *from); - -/* both are in le form */ -extern int comp_le_keys(const struct reiserfs_key *, - const struct reiserfs_key *); -extern int comp_short_le_keys(const struct reiserfs_key *, - const struct reiserfs_key *); - -/* * get key version from on disk key - kludge */ -static inline int le_key_version(const struct reiserfs_key *key) -{ - int type; - - type = offset_v2_k_type(&(key->u.k_offset_v2)); - if (type != TYPE_DIRECT && type != TYPE_INDIRECT - && type != TYPE_DIRENTRY) - return KEY_FORMAT_3_5; - - return KEY_FORMAT_3_6; - -} - -static inline void copy_key(struct reiserfs_key *to, - const struct reiserfs_key *from) -{ - memcpy(to, from, KEY_SIZE); -} - -int comp_items(const struct item_head *stored_ih, const struct treepath *path); -const struct reiserfs_key *get_rkey(const struct treepath *chk_path, - const struct super_block *sb); -int search_by_key(struct super_block *, const struct cpu_key *, - struct treepath *, int); -#define search_item(s,key,path) search_by_key (s, key, path, DISK_LEAF_NODE_LEVEL) -int search_for_position_by_key(struct super_block *sb, - const struct cpu_key *cpu_key, - struct treepath *search_path); -extern void decrement_bcount(struct buffer_head *bh); -void decrement_counters_in_path(struct treepath *search_path); -void pathrelse(struct treepath *search_path); -int reiserfs_check_path(struct treepath *p); -void pathrelse_and_restore(struct super_block *s, struct treepath *search_path); - -int reiserfs_insert_item(struct reiserfs_transaction_handle *th, - struct treepath *path, - const struct cpu_key *key, - struct item_head *ih, - struct inode *inode, const char *body); - -int reiserfs_paste_into_item(struct reiserfs_transaction_handle *th, - struct treepath *path, - const struct cpu_key *key, - struct inode *inode, - const char *body, int paste_size); - -int reiserfs_cut_from_item(struct reiserfs_transaction_handle *th, - struct treepath *path, - struct cpu_key *key, - struct inode *inode, - struct page *page, loff_t new_file_size); - -int reiserfs_delete_item(struct reiserfs_transaction_handle *th, - struct treepath *path, - const struct cpu_key *key, - struct inode *inode, struct buffer_head *un_bh); - -void reiserfs_delete_solid_item(struct reiserfs_transaction_handle *th, - struct inode *inode, struct reiserfs_key *key); -int reiserfs_delete_object(struct reiserfs_transaction_handle *th, - struct inode *inode); -int reiserfs_do_truncate(struct reiserfs_transaction_handle *th, - struct inode *inode, struct page *, - int update_timestamps); - -#define i_block_size(inode) ((inode)->i_sb->s_blocksize) -#define file_size(inode) ((inode)->i_size) -#define tail_size(inode) (file_size (inode) & (i_block_size (inode) - 1)) - -#define tail_has_to_be_packed(inode) (have_large_tails ((inode)->i_sb)?\ -!STORE_TAIL_IN_UNFM_S1(file_size (inode), tail_size(inode), inode->i_sb->s_blocksize):have_small_tails ((inode)->i_sb)?!STORE_TAIL_IN_UNFM_S2(file_size (inode), tail_size(inode), inode->i_sb->s_blocksize):0 ) - -void padd_item(char *item, int total_length, int length); - -/* inode.c */ -/* args for the create parameter of reiserfs_get_block */ -#define GET_BLOCK_NO_CREATE 0 /* don't create new blocks or convert tails */ -#define GET_BLOCK_CREATE 1 /* add anything you need to find block */ -#define GET_BLOCK_NO_HOLE 2 /* return -ENOENT for file holes */ -#define GET_BLOCK_READ_DIRECT 4 /* read the tail if indirect item not found */ -#define GET_BLOCK_NO_IMUX 8 /* i_mutex is not held, don't preallocate */ -#define GET_BLOCK_NO_DANGLE 16 /* don't leave any transactions running */ - -void reiserfs_read_locked_inode(struct inode *inode, - struct reiserfs_iget_args *args); -int reiserfs_find_actor(struct inode *inode, void *p); -int reiserfs_init_locked_inode(struct inode *inode, void *p); -void reiserfs_evict_inode(struct inode *inode); -int reiserfs_write_inode(struct inode *inode, struct writeback_control *wbc); -int reiserfs_get_block(struct inode *inode, sector_t block, - struct buffer_head *bh_result, int create); -struct dentry *reiserfs_fh_to_dentry(struct super_block *sb, struct fid *fid, - int fh_len, int fh_type); -struct dentry *reiserfs_fh_to_parent(struct super_block *sb, struct fid *fid, - int fh_len, int fh_type); -int reiserfs_encode_fh(struct inode *inode, __u32 * data, int *lenp, - struct inode *parent); - -int reiserfs_truncate_file(struct inode *, int update_timestamps); -void make_cpu_key(struct cpu_key *cpu_key, struct inode *inode, loff_t offset, - int type, int key_length); -void make_le_item_head(struct item_head *ih, const struct cpu_key *key, - int version, - loff_t offset, int type, int length, int entry_count); -struct inode *reiserfs_iget(struct super_block *s, const struct cpu_key *key); - -struct reiserfs_security_handle; -int reiserfs_new_inode(struct reiserfs_transaction_handle *th, - struct inode *dir, umode_t mode, - const char *symname, loff_t i_size, - struct dentry *dentry, struct inode *inode, - struct reiserfs_security_handle *security); - -void reiserfs_update_sd_size(struct reiserfs_transaction_handle *th, - struct inode *inode, loff_t size); - -static inline void reiserfs_update_sd(struct reiserfs_transaction_handle *th, - struct inode *inode) -{ - reiserfs_update_sd_size(th, inode, inode->i_size); -} - -void sd_attrs_to_i_attrs(__u16 sd_attrs, struct inode *inode); -int reiserfs_setattr(struct mnt_idmap *idmap, struct dentry *dentry, - struct iattr *attr); - -int __reiserfs_write_begin(struct page *page, unsigned from, unsigned len); - -/* namei.c */ -void reiserfs_init_priv_inode(struct inode *inode); -void set_de_name_and_namelen(struct reiserfs_dir_entry *de); -int search_by_entry_key(struct super_block *sb, const struct cpu_key *key, - struct treepath *path, struct reiserfs_dir_entry *de); -struct dentry *reiserfs_get_parent(struct dentry *); - -#ifdef CONFIG_REISERFS_PROC_INFO -int reiserfs_proc_info_init(struct super_block *sb); -int reiserfs_proc_info_done(struct super_block *sb); -int reiserfs_proc_info_global_init(void); -int reiserfs_proc_info_global_done(void); - -#define PROC_EXP( e ) e - -#define __PINFO( sb ) REISERFS_SB(sb) -> s_proc_info_data -#define PROC_INFO_MAX( sb, field, value ) \ - __PINFO( sb ).field = \ - max( REISERFS_SB( sb ) -> s_proc_info_data.field, value ) -#define PROC_INFO_INC( sb, field ) ( ++ ( __PINFO( sb ).field ) ) -#define PROC_INFO_ADD( sb, field, val ) ( __PINFO( sb ).field += ( val ) ) -#define PROC_INFO_BH_STAT( sb, bh, level ) \ - PROC_INFO_INC( sb, sbk_read_at[ ( level ) ] ); \ - PROC_INFO_ADD( sb, free_at[ ( level ) ], B_FREE_SPACE( bh ) ); \ - PROC_INFO_ADD( sb, items_at[ ( level ) ], B_NR_ITEMS( bh ) ) -#else -static inline int reiserfs_proc_info_init(struct super_block *sb) -{ - return 0; -} - -static inline int reiserfs_proc_info_done(struct super_block *sb) -{ - return 0; -} - -static inline int reiserfs_proc_info_global_init(void) -{ - return 0; -} - -static inline int reiserfs_proc_info_global_done(void) -{ - return 0; -} - -#define PROC_EXP( e ) -#define VOID_V ( ( void ) 0 ) -#define PROC_INFO_MAX( sb, field, value ) VOID_V -#define PROC_INFO_INC( sb, field ) VOID_V -#define PROC_INFO_ADD( sb, field, val ) VOID_V -#define PROC_INFO_BH_STAT(sb, bh, n_node_level) VOID_V -#endif - -/* dir.c */ -extern const struct inode_operations reiserfs_dir_inode_operations; -extern const struct inode_operations reiserfs_symlink_inode_operations; -extern const struct inode_operations reiserfs_special_inode_operations; -extern const struct file_operations reiserfs_dir_operations; -int reiserfs_readdir_inode(struct inode *, struct dir_context *); - -/* tail_conversion.c */ -int direct2indirect(struct reiserfs_transaction_handle *, struct inode *, - struct treepath *, struct buffer_head *, loff_t); -int indirect2direct(struct reiserfs_transaction_handle *, struct inode *, - struct page *, struct treepath *, const struct cpu_key *, - loff_t, char *); -void reiserfs_unmap_buffer(struct buffer_head *); - -/* file.c */ -extern const struct inode_operations reiserfs_file_inode_operations; -extern const struct inode_operations reiserfs_priv_file_inode_operations; -extern const struct file_operations reiserfs_file_operations; -extern const struct address_space_operations reiserfs_address_space_operations; - -/* fix_nodes.c */ - -int fix_nodes(int n_op_mode, struct tree_balance *tb, - struct item_head *ins_ih, const void *); -void unfix_nodes(struct tree_balance *); - -/* prints.c */ -void __reiserfs_panic(struct super_block *s, const char *id, - const char *function, const char *fmt, ...) - __attribute__ ((noreturn)); -#define reiserfs_panic(s, id, fmt, args...) \ - __reiserfs_panic(s, id, __func__, fmt, ##args) -void __reiserfs_error(struct super_block *s, const char *id, - const char *function, const char *fmt, ...); -#define reiserfs_error(s, id, fmt, args...) \ - __reiserfs_error(s, id, __func__, fmt, ##args) -void reiserfs_info(struct super_block *s, const char *fmt, ...); -void reiserfs_debug(struct super_block *s, int level, const char *fmt, ...); -void print_indirect_item(struct buffer_head *bh, int item_num); -void store_print_tb(struct tree_balance *tb); -void print_cur_tb(char *mes); -void print_de(struct reiserfs_dir_entry *de); -void print_bi(struct buffer_info *bi, char *mes); -#define PRINT_LEAF_ITEMS 1 /* print all items */ -#define PRINT_DIRECTORY_ITEMS 2 /* print directory items */ -#define PRINT_DIRECT_ITEMS 4 /* print contents of direct items */ -void print_block(struct buffer_head *bh, ...); -void print_bmap(struct super_block *s, int silent); -void print_bmap_block(int i, char *data, int size, int silent); -/*void print_super_block (struct super_block * s, char * mes);*/ -void print_objectid_map(struct super_block *s); -void print_block_head(struct buffer_head *bh, char *mes); -void check_leaf(struct buffer_head *bh); -void check_internal(struct buffer_head *bh); -void print_statistics(struct super_block *s); -char *reiserfs_hashname(int code); - -/* lbalance.c */ -int leaf_move_items(int shift_mode, struct tree_balance *tb, int mov_num, - int mov_bytes, struct buffer_head *Snew); -int leaf_shift_left(struct tree_balance *tb, int shift_num, int shift_bytes); -int leaf_shift_right(struct tree_balance *tb, int shift_num, int shift_bytes); -void leaf_delete_items(struct buffer_info *cur_bi, int last_first, int first, - int del_num, int del_bytes); -void leaf_insert_into_buf(struct buffer_info *bi, int before, - struct item_head * const inserted_item_ih, - const char * const inserted_item_body, - int zeros_number); -void leaf_paste_in_buffer(struct buffer_info *bi, int pasted_item_num, - int pos_in_item, int paste_size, - const char * const body, int zeros_number); -void leaf_cut_from_buffer(struct buffer_info *bi, int cut_item_num, - int pos_in_item, int cut_size); -void leaf_paste_entries(struct buffer_info *bi, int item_num, int before, - int new_entry_count, struct reiserfs_de_head *new_dehs, - const char *records, int paste_size); -/* ibalance.c */ -int balance_internal(struct tree_balance *, int, int, struct item_head *, - struct buffer_head **); - -/* do_balance.c */ -void do_balance_mark_leaf_dirty(struct tree_balance *tb, - struct buffer_head *bh, int flag); -#define do_balance_mark_internal_dirty do_balance_mark_leaf_dirty -#define do_balance_mark_sb_dirty do_balance_mark_leaf_dirty - -void do_balance(struct tree_balance *tb, struct item_head *ih, - const char *body, int flag); -void reiserfs_invalidate_buffer(struct tree_balance *tb, - struct buffer_head *bh); - -int get_left_neighbor_position(struct tree_balance *tb, int h); -int get_right_neighbor_position(struct tree_balance *tb, int h); -void replace_key(struct tree_balance *tb, struct buffer_head *, int, - struct buffer_head *, int); -void make_empty_node(struct buffer_info *); -struct buffer_head *get_FEB(struct tree_balance *); - -/* bitmap.c */ - -/* - * structure contains hints for block allocator, and it is a container for - * arguments, such as node, search path, transaction_handle, etc. - */ -struct __reiserfs_blocknr_hint { - /* inode passed to allocator, if we allocate unf. nodes */ - struct inode *inode; - - sector_t block; /* file offset, in blocks */ - struct in_core_key key; - - /* - * search path, used by allocator to deternine search_start by - * various ways - */ - struct treepath *path; - - /* - * transaction handle is needed to log super blocks - * and bitmap blocks changes - */ - struct reiserfs_transaction_handle *th; - - b_blocknr_t beg, end; - - /* - * a field used to transfer search start value (block number) - * between different block allocator procedures - * (determine_search_start() and others) - */ - b_blocknr_t search_start; - - /* - * is set in determine_prealloc_size() function, - * used by underlayed function that do actual allocation - */ - int prealloc_size; - - /* - * the allocator uses different polices for getting disk - * space for formatted/unformatted blocks with/without preallocation - */ - unsigned formatted_node:1; - unsigned preallocate:1; -}; - -typedef struct __reiserfs_blocknr_hint reiserfs_blocknr_hint_t; - -int reiserfs_parse_alloc_options(struct super_block *, char *); -void reiserfs_init_alloc_options(struct super_block *s); - -/* - * given a directory, this will tell you what packing locality - * to use for a new object underneat it. The locality is returned - * in disk byte order (le). - */ -__le32 reiserfs_choose_packing(struct inode *dir); - -void show_alloc_options(struct seq_file *seq, struct super_block *s); -int reiserfs_init_bitmap_cache(struct super_block *sb); -void reiserfs_free_bitmap_cache(struct super_block *sb); -void reiserfs_cache_bitmap_metadata(struct super_block *sb, struct buffer_head *bh, struct reiserfs_bitmap_info *info); -struct buffer_head *reiserfs_read_bitmap_block(struct super_block *sb, unsigned int bitmap); -int is_reusable(struct super_block *s, b_blocknr_t block, int bit_value); -void reiserfs_free_block(struct reiserfs_transaction_handle *th, struct inode *, - b_blocknr_t, int for_unformatted); -int reiserfs_allocate_blocknrs(reiserfs_blocknr_hint_t *, b_blocknr_t *, int, - int); -static inline int reiserfs_new_form_blocknrs(struct tree_balance *tb, - b_blocknr_t * new_blocknrs, - int amount_needed) -{ - reiserfs_blocknr_hint_t hint = { - .th = tb->transaction_handle, - .path = tb->tb_path, - .inode = NULL, - .key = tb->key, - .block = 0, - .formatted_node = 1 - }; - return reiserfs_allocate_blocknrs(&hint, new_blocknrs, amount_needed, - 0); -} - -static inline int reiserfs_new_unf_blocknrs(struct reiserfs_transaction_handle - *th, struct inode *inode, - b_blocknr_t * new_blocknrs, - struct treepath *path, - sector_t block) -{ - reiserfs_blocknr_hint_t hint = { - .th = th, - .path = path, - .inode = inode, - .block = block, - .formatted_node = 0, - .preallocate = 0 - }; - return reiserfs_allocate_blocknrs(&hint, new_blocknrs, 1, 0); -} - -#ifdef REISERFS_PREALLOCATE -static inline int reiserfs_new_unf_blocknrs2(struct reiserfs_transaction_handle - *th, struct inode *inode, - b_blocknr_t * new_blocknrs, - struct treepath *path, - sector_t block) -{ - reiserfs_blocknr_hint_t hint = { - .th = th, - .path = path, - .inode = inode, - .block = block, - .formatted_node = 0, - .preallocate = 1 - }; - return reiserfs_allocate_blocknrs(&hint, new_blocknrs, 1, 0); -} - -void reiserfs_discard_prealloc(struct reiserfs_transaction_handle *th, - struct inode *inode); -void reiserfs_discard_all_prealloc(struct reiserfs_transaction_handle *th); -#endif - -/* hashes.c */ -__u32 keyed_hash(const signed char *msg, int len); -__u32 yura_hash(const signed char *msg, int len); -__u32 r5_hash(const signed char *msg, int len); - -#define reiserfs_set_le_bit __set_bit_le -#define reiserfs_test_and_set_le_bit __test_and_set_bit_le -#define reiserfs_clear_le_bit __clear_bit_le -#define reiserfs_test_and_clear_le_bit __test_and_clear_bit_le -#define reiserfs_test_le_bit test_bit_le -#define reiserfs_find_next_zero_le_bit find_next_zero_bit_le - -/* - * sometimes reiserfs_truncate may require to allocate few new blocks - * to perform indirect2direct conversion. People probably used to - * think, that truncate should work without problems on a filesystem - * without free disk space. They may complain that they can not - * truncate due to lack of free disk space. This spare space allows us - * to not worry about it. 500 is probably too much, but it should be - * absolutely safe - */ -#define SPARE_SPACE 500 - -/* prototypes from ioctl.c */ -int reiserfs_fileattr_get(struct dentry *dentry, struct fileattr *fa); -int reiserfs_fileattr_set(struct mnt_idmap *idmap, - struct dentry *dentry, struct fileattr *fa); -long reiserfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg); -long reiserfs_compat_ioctl(struct file *filp, - unsigned int cmd, unsigned long arg); -int reiserfs_unpack(struct inode *inode); |