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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* Copyright 1996-2000 Hans Reiser, see reiserfs/README for licensing
2 * and copyright details */
3
4#ifndef _LINUX_REISER_FS_SB
5#define _LINUX_REISER_FS_SB
6
7#ifdef __KERNEL__
8#include <linux/workqueue.h>
9#include <linux/rwsem.h>
10#endif
11
12typedef enum {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070013 reiserfs_attrs_cleared = 0x00000001,
Linus Torvalds1da177e2005-04-16 15:20:36 -070014} reiserfs_super_block_flags;
15
16/* struct reiserfs_super_block accessors/mutators
17 * since this is a disk structure, it will always be in
18 * little endian format. */
19#define sb_block_count(sbp) (le32_to_cpu((sbp)->s_v1.s_block_count))
20#define set_sb_block_count(sbp,v) ((sbp)->s_v1.s_block_count = cpu_to_le32(v))
21#define sb_free_blocks(sbp) (le32_to_cpu((sbp)->s_v1.s_free_blocks))
22#define set_sb_free_blocks(sbp,v) ((sbp)->s_v1.s_free_blocks = cpu_to_le32(v))
23#define sb_root_block(sbp) (le32_to_cpu((sbp)->s_v1.s_root_block))
24#define set_sb_root_block(sbp,v) ((sbp)->s_v1.s_root_block = cpu_to_le32(v))
25
26#define sb_jp_journal_1st_block(sbp) \
27 (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_1st_block))
28#define set_sb_jp_journal_1st_block(sbp,v) \
29 ((sbp)->s_v1.s_journal.jp_journal_1st_block = cpu_to_le32(v))
30#define sb_jp_journal_dev(sbp) \
31 (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_dev))
32#define set_sb_jp_journal_dev(sbp,v) \
33 ((sbp)->s_v1.s_journal.jp_journal_dev = cpu_to_le32(v))
34#define sb_jp_journal_size(sbp) \
35 (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_size))
36#define set_sb_jp_journal_size(sbp,v) \
37 ((sbp)->s_v1.s_journal.jp_journal_size = cpu_to_le32(v))
38#define sb_jp_journal_trans_max(sbp) \
39 (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_trans_max))
40#define set_sb_jp_journal_trans_max(sbp,v) \
41 ((sbp)->s_v1.s_journal.jp_journal_trans_max = cpu_to_le32(v))
42#define sb_jp_journal_magic(sbp) \
43 (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_magic))
44#define set_sb_jp_journal_magic(sbp,v) \
45 ((sbp)->s_v1.s_journal.jp_journal_magic = cpu_to_le32(v))
46#define sb_jp_journal_max_batch(sbp) \
47 (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_max_batch))
48#define set_sb_jp_journal_max_batch(sbp,v) \
49 ((sbp)->s_v1.s_journal.jp_journal_max_batch = cpu_to_le32(v))
50#define sb_jp_jourmal_max_commit_age(sbp) \
51 (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_max_commit_age))
52#define set_sb_jp_journal_max_commit_age(sbp,v) \
53 ((sbp)->s_v1.s_journal.jp_journal_max_commit_age = cpu_to_le32(v))
54
55#define sb_blocksize(sbp) (le16_to_cpu((sbp)->s_v1.s_blocksize))
56#define set_sb_blocksize(sbp,v) ((sbp)->s_v1.s_blocksize = cpu_to_le16(v))
57#define sb_oid_maxsize(sbp) (le16_to_cpu((sbp)->s_v1.s_oid_maxsize))
58#define set_sb_oid_maxsize(sbp,v) ((sbp)->s_v1.s_oid_maxsize = cpu_to_le16(v))
59#define sb_oid_cursize(sbp) (le16_to_cpu((sbp)->s_v1.s_oid_cursize))
60#define set_sb_oid_cursize(sbp,v) ((sbp)->s_v1.s_oid_cursize = cpu_to_le16(v))
61#define sb_umount_state(sbp) (le16_to_cpu((sbp)->s_v1.s_umount_state))
62#define set_sb_umount_state(sbp,v) ((sbp)->s_v1.s_umount_state = cpu_to_le16(v))
63#define sb_fs_state(sbp) (le16_to_cpu((sbp)->s_v1.s_fs_state))
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070064#define set_sb_fs_state(sbp,v) ((sbp)->s_v1.s_fs_state = cpu_to_le16(v))
Linus Torvalds1da177e2005-04-16 15:20:36 -070065#define sb_hash_function_code(sbp) \
66 (le32_to_cpu((sbp)->s_v1.s_hash_function_code))
67#define set_sb_hash_function_code(sbp,v) \
68 ((sbp)->s_v1.s_hash_function_code = cpu_to_le32(v))
69#define sb_tree_height(sbp) (le16_to_cpu((sbp)->s_v1.s_tree_height))
70#define set_sb_tree_height(sbp,v) ((sbp)->s_v1.s_tree_height = cpu_to_le16(v))
71#define sb_bmap_nr(sbp) (le16_to_cpu((sbp)->s_v1.s_bmap_nr))
72#define set_sb_bmap_nr(sbp,v) ((sbp)->s_v1.s_bmap_nr = cpu_to_le16(v))
73#define sb_version(sbp) (le16_to_cpu((sbp)->s_v1.s_version))
74#define set_sb_version(sbp,v) ((sbp)->s_v1.s_version = cpu_to_le16(v))
75
76#define sb_reserved_for_journal(sbp) \
77 (le16_to_cpu((sbp)->s_v1.s_reserved_for_journal))
78#define set_sb_reserved_for_journal(sbp,v) \
79 ((sbp)->s_v1.s_reserved_for_journal = cpu_to_le16(v))
80
81/* LOGGING -- */
82
83/* These all interelate for performance.
84**
85** If the journal block count is smaller than n transactions, you lose speed.
86** I don't know what n is yet, I'm guessing 8-16.
87**
88** typical transaction size depends on the application, how often fsync is
89** called, and how many metadata blocks you dirty in a 30 second period.
90** The more small files (<16k) you use, the larger your transactions will
91** be.
92**
93** If your journal fills faster than dirty buffers get flushed to disk, it must flush them before allowing the journal
94** to wrap, which slows things down. If you need high speed meta data updates, the journal should be big enough
95** to prevent wrapping before dirty meta blocks get to disk.
96**
97** If the batch max is smaller than the transaction max, you'll waste space at the end of the journal
98** because journal_end sets the next transaction to start at 0 if the next transaction has any chance of wrapping.
99**
100** The large the batch max age, the better the speed, and the more meta data changes you'll lose after a crash.
101**
102*/
103
104/* don't mess with these for a while */
105 /* we have a node size define somewhere in reiserfs_fs.h. -Hans */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700106#define JOURNAL_BLOCK_SIZE 4096 /* BUG gotta get rid of this */
107#define JOURNAL_MAX_CNODE 1500 /* max cnodes to allocate. */
108#define JOURNAL_HASH_SIZE 8192
109#define JOURNAL_NUM_BITMAPS 5 /* number of copies of the bitmaps to have floating. Must be >= 2 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110
111/* One of these for every block in every transaction
112** Each one is in two hash tables. First, a hash of the current transaction, and after journal_end, a
113** hash of all the in memory transactions.
114** next and prev are used by the current transaction (journal_hash).
115** hnext and hprev are used by journal_list_hash. If a block is in more than one transaction, the journal_list_hash
116** links it in multiple times. This allows flush_journal_list to remove just the cnode belonging
117** to a given transaction.
118*/
119struct reiserfs_journal_cnode {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700120 struct buffer_head *bh; /* real buffer head */
121 struct super_block *sb; /* dev of real buffer head */
122 __u32 blocknr; /* block number of real buffer head, == 0 when buffer on disk */
Al Viro5ba25332007-10-14 19:35:50 +0100123 unsigned long state;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700124 struct reiserfs_journal_list *jlist; /* journal list this cnode lives in */
125 struct reiserfs_journal_cnode *next; /* next in transaction list */
126 struct reiserfs_journal_cnode *prev; /* prev in transaction list */
127 struct reiserfs_journal_cnode *hprev; /* prev in hash list */
128 struct reiserfs_journal_cnode *hnext; /* next in hash list */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129};
130
131struct reiserfs_bitmap_node {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700132 int id;
133 char *data;
134 struct list_head list;
135};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136
137struct reiserfs_list_bitmap {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700138 struct reiserfs_journal_list *journal_list;
139 struct reiserfs_bitmap_node **bitmaps;
140};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141
142/*
143** one of these for each transaction. The most important part here is the j_realblock.
144** this list of cnodes is used to hash all the blocks in all the commits, to mark all the
145** real buffer heads dirty once all the commits hit the disk,
146** and to make sure every real block in a transaction is on disk before allowing the log area
147** to be overwritten */
148struct reiserfs_journal_list {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700149 unsigned long j_start;
150 unsigned long j_state;
151 unsigned long j_len;
152 atomic_t j_nonzerolen;
153 atomic_t j_commit_left;
154 atomic_t j_older_commits_done; /* all commits older than this on disk */
Jeff Mahoney90415de2008-07-25 01:46:40 -0700155 struct mutex j_commit_mutex;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700156 unsigned long j_trans_id;
157 time_t j_timestamp;
158 struct reiserfs_list_bitmap *j_list_bitmap;
159 struct buffer_head *j_commit_bh; /* commit buffer head */
160 struct reiserfs_journal_cnode *j_realblock;
161 struct reiserfs_journal_cnode *j_freedlist; /* list of buffers that were freed during this trans. free each of these on flush */
162 /* time ordered list of all active transactions */
163 struct list_head j_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700165 /* time ordered list of all transactions we haven't tried to flush yet */
166 struct list_head j_working_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700168 /* list of tail conversion targets in need of flush before commit */
169 struct list_head j_tail_bh_list;
170 /* list of data=ordered buffers in need of flush before commit */
171 struct list_head j_bh_list;
172 int j_refcount;
173};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174
175struct reiserfs_journal {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700176 struct buffer_head **j_ap_blocks; /* journal blocks on disk */
177 struct reiserfs_journal_cnode *j_last; /* newest journal block */
178 struct reiserfs_journal_cnode *j_first; /* oldest journal block. start here for traverse */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700180 struct block_device *j_dev_bd;
Al Viroe5eb8ca2007-10-08 13:24:05 -0400181 fmode_t j_dev_mode;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700182 int j_1st_reserved_block; /* first block on s_dev of reserved area journal */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183
Al Viro5ba25332007-10-14 19:35:50 +0100184 unsigned long j_state;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700185 unsigned long j_trans_id;
186 unsigned long j_mount_id;
187 unsigned long j_start; /* start of current waiting commit (index into j_ap_blocks) */
Paulius Zaleckasefad798b2008-02-03 15:42:53 +0200188 unsigned long j_len; /* length of current waiting commit */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700189 unsigned long j_len_alloc; /* number of buffers requested by journal_begin() */
190 atomic_t j_wcount; /* count of writers for current commit */
191 unsigned long j_bcount; /* batch count. allows turning X transactions into 1 */
192 unsigned long j_first_unflushed_offset; /* first unflushed transactions offset */
193 unsigned long j_last_flush_trans_id; /* last fully flushed journal timestamp */
194 struct buffer_head *j_header_bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700196 time_t j_trans_start_time; /* time this transaction started */
Jeff Mahoneyf68215c2008-07-25 01:46:38 -0700197 struct mutex j_mutex;
Jeff Mahoneyafe70252008-07-25 01:46:39 -0700198 struct mutex j_flush_mutex;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700199 wait_queue_head_t j_join_wait; /* wait for current transaction to finish before starting new one */
200 atomic_t j_jlock; /* lock for j_join_wait */
201 int j_list_bitmap_index; /* number of next list bitmap to use */
202 int j_must_wait; /* no more journal begins allowed. MUST sleep on j_join_wait */
203 int j_next_full_flush; /* next journal_end will flush all journal list */
204 int j_next_async_flush; /* next journal_end will flush all async commits */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700206 int j_cnode_used; /* number of cnodes on the used list */
207 int j_cnode_free; /* number of cnodes on the free list */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700209 unsigned int j_trans_max; /* max number of blocks in a transaction. */
210 unsigned int j_max_batch; /* max number of blocks to batch into a trans */
211 unsigned int j_max_commit_age; /* in seconds, how old can an async commit be */
212 unsigned int j_max_trans_age; /* in seconds, how old can a transaction be */
213 unsigned int j_default_max_commit_age; /* the default for the max commit age */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700215 struct reiserfs_journal_cnode *j_cnode_free_list;
216 struct reiserfs_journal_cnode *j_cnode_free_orig; /* orig pointer returned from vmalloc */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700218 struct reiserfs_journal_list *j_current_jl;
219 int j_free_bitmap_nodes;
220 int j_used_bitmap_nodes;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700222 int j_num_lists; /* total number of active transactions */
223 int j_num_work_lists; /* number that need attention from kreiserfsd */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700225 /* debugging to make sure things are flushed in order */
226 int j_last_flush_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700228 /* debugging to make sure things are committed in order */
229 int j_last_commit_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700231 struct list_head j_bitmap_nodes;
232 struct list_head j_dirty_buffers;
233 spinlock_t j_dirty_buffers_lock; /* protects j_dirty_buffers */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700235 /* list of all active transactions */
236 struct list_head j_journal_list;
237 /* lists that haven't been touched by writeback attempts */
238 struct list_head j_working_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700240 struct reiserfs_list_bitmap j_list_bitmap[JOURNAL_NUM_BITMAPS]; /* array of bitmaps to record the deleted blocks */
241 struct reiserfs_journal_cnode *j_hash_table[JOURNAL_HASH_SIZE]; /* hash table for real buffer heads in current trans */
242 struct reiserfs_journal_cnode *j_list_hash_table[JOURNAL_HASH_SIZE]; /* hash table for all the real buffer heads in all
243 the transactions */
244 struct list_head j_prealloc_list; /* list of inodes which have preallocated blocks */
245 int j_persistent_trans;
246 unsigned long j_max_trans_size;
247 unsigned long j_max_batch_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700249 int j_errno;
250
251 /* when flushing ordered buffers, throttle new ordered writers */
David Howellsc4028952006-11-22 14:57:56 +0000252 struct delayed_work j_work;
253 struct super_block *j_work_sb;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700254 atomic_t j_async_throttle;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255};
256
257enum journal_state_bits {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700258 J_WRITERS_BLOCKED = 1, /* set when new writers not allowed */
259 J_WRITERS_QUEUED, /* set when log is full due to too many writers */
260 J_ABORTED, /* set when log is aborted */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261};
262
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700263#define JOURNAL_DESC_MAGIC "ReIsErLB" /* ick. magic string to find desc blocks in the journal */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700265typedef __u32(*hashf_t) (const signed char *, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700267struct reiserfs_bitmap_info {
Jeff Mahoney4d208512007-10-18 23:39:26 -0700268 __u32 free_count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269};
270
271struct proc_dir_entry;
272
273#if defined( CONFIG_PROC_FS ) && defined( CONFIG_REISERFS_PROC_INFO )
274typedef unsigned long int stat_cnt_t;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700275typedef struct reiserfs_proc_info_data {
276 spinlock_t lock;
277 int exiting;
278 int max_hash_collisions;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700280 stat_cnt_t breads;
281 stat_cnt_t bread_miss;
282 stat_cnt_t search_by_key;
283 stat_cnt_t search_by_key_fs_changed;
284 stat_cnt_t search_by_key_restarted;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700286 stat_cnt_t insert_item_restarted;
287 stat_cnt_t paste_into_item_restarted;
288 stat_cnt_t cut_from_item_restarted;
289 stat_cnt_t delete_solid_item_restarted;
290 stat_cnt_t delete_item_restarted;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700292 stat_cnt_t leaked_oid;
293 stat_cnt_t leaves_removable;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700295 /* balances per level. Use explicit 5 as MAX_HEIGHT is not visible yet. */
296 stat_cnt_t balance_at[5]; /* XXX */
297 /* sbk == search_by_key */
298 stat_cnt_t sbk_read_at[5]; /* XXX */
299 stat_cnt_t sbk_fs_changed[5];
300 stat_cnt_t sbk_restarted[5];
301 stat_cnt_t items_at[5]; /* XXX */
302 stat_cnt_t free_at[5]; /* XXX */
303 stat_cnt_t can_node_be_removed[5]; /* XXX */
304 long int lnum[5]; /* XXX */
305 long int rnum[5]; /* XXX */
306 long int lbytes[5]; /* XXX */
307 long int rbytes[5]; /* XXX */
308 stat_cnt_t get_neighbors[5];
309 stat_cnt_t get_neighbors_restart[5];
310 stat_cnt_t need_l_neighbor[5];
311 stat_cnt_t need_r_neighbor[5];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700313 stat_cnt_t free_block;
314 struct __scan_bitmap_stats {
315 stat_cnt_t call;
316 stat_cnt_t wait;
317 stat_cnt_t bmap;
318 stat_cnt_t retry;
319 stat_cnt_t in_journal_hint;
320 stat_cnt_t in_journal_nohint;
321 stat_cnt_t stolen;
322 } scan_bitmap;
323 struct __journal_stats {
324 stat_cnt_t in_journal;
325 stat_cnt_t in_journal_bitmap;
326 stat_cnt_t in_journal_reusable;
327 stat_cnt_t lock_journal;
328 stat_cnt_t lock_journal_wait;
329 stat_cnt_t journal_being;
330 stat_cnt_t journal_relock_writers;
331 stat_cnt_t journal_relock_wcount;
332 stat_cnt_t mark_dirty;
333 stat_cnt_t mark_dirty_already;
334 stat_cnt_t mark_dirty_notjournal;
335 stat_cnt_t restore_prepared;
336 stat_cnt_t prepare;
337 stat_cnt_t prepare_retry;
338 } journal;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339} reiserfs_proc_info_data_t;
340#else
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700341typedef struct reiserfs_proc_info_data {
342} reiserfs_proc_info_data_t;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343#endif
344
345/* reiserfs union of in-core super block data */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700346struct reiserfs_sb_info {
347 struct buffer_head *s_sbh; /* Buffer containing the super block */
348 /* both the comment and the choice of
349 name are unclear for s_rs -Hans */
350 struct reiserfs_super_block *s_rs; /* Pointer to the super block in the buffer */
351 struct reiserfs_bitmap_info *s_ap_bitmap;
352 struct reiserfs_journal *s_journal; /* pointer to journal information */
353 unsigned short s_mount_state; /* reiserfs state (valid, invalid) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700355 /* Comment? -Hans */
356 void (*end_io_handler) (struct buffer_head *, int);
357 hashf_t s_hash_function; /* pointer to function which is used
358 to sort names in directory. Set on
359 mount */
360 unsigned long s_mount_opt; /* reiserfs's mount options are set
361 here (currently - NOTAIL, NOLOG,
362 REPLAYONLY) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700364 struct { /* This is a structure that describes block allocator options */
365 unsigned long bits; /* Bitfield for enable/disable kind of options */
366 unsigned long large_file_size; /* size started from which we consider file to be a large one(in blocks) */
367 int border; /* percentage of disk, border takes */
368 int preallocmin; /* Minimal file size (in blocks) starting from which we do preallocations */
369 int preallocsize; /* Number of blocks we try to prealloc when file
370 reaches preallocmin size (in blocks) or
371 prealloc_list is empty. */
372 } s_alloc_options;
373
374 /* Comment? -Hans */
375 wait_queue_head_t s_wait;
376 /* To be obsoleted soon by per buffer seals.. -Hans */
377 atomic_t s_generation_counter; // increased by one every time the
378 // tree gets re-balanced
379 unsigned long s_properties; /* File system properties. Currently holds
380 on-disk FS format */
381
382 /* session statistics */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700383 int s_disk_reads;
384 int s_disk_writes;
385 int s_fix_nodes;
386 int s_do_balance;
387 int s_unneeded_left_neighbor;
388 int s_good_search_by_key_reada;
389 int s_bmaps;
390 int s_bmaps_without_search;
391 int s_direct2indirect;
392 int s_indirect2direct;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 /* set up when it's ok for reiserfs_read_inode2() to read from
394 disk inode with nlink==0. Currently this is only used during
395 finish_unfinished() processing at mount time */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700396 int s_is_unlinked_ok;
397 reiserfs_proc_info_data_t s_proc_info_data;
398 struct proc_dir_entry *procdir;
399 int reserved_blocks; /* amount of blocks reserved for further allocations */
400 spinlock_t bitmap_lock; /* this lock on now only used to protect reserved_blocks variable */
401 struct dentry *priv_root; /* root of /.reiserfs_priv */
Alexey Dobriyanfe08a9d2007-05-08 00:24:55 -0700402#ifdef CONFIG_REISERFS_FS_XATTR
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700403 struct dentry *xattr_root; /* root of /.reiserfs_priv/.xa */
404 struct rw_semaphore xattr_dir_sem;
Alexey Dobriyanfe08a9d2007-05-08 00:24:55 -0700405#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700406 int j_errno;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700408 char *s_qf_names[MAXQUOTAS];
409 int s_jquota_fmt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410#endif
411};
412
413/* Definitions of reiserfs on-disk properties: */
414#define REISERFS_3_5 0
415#define REISERFS_3_6 1
Jeff Mahoneye1fabd32006-09-30 23:28:40 -0700416#define REISERFS_OLD_FORMAT 2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417
418enum reiserfs_mount_options {
419/* Mount options */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700420 REISERFS_LARGETAIL, /* large tails will be created in a session */
421 REISERFS_SMALLTAIL, /* small (for files less than block size) tails will be created in a session */
422 REPLAYONLY, /* replay journal and return 0. Use by fsck */
423 REISERFS_CONVERT, /* -o conv: causes conversion of old
424 format super block to the new
425 format. If not specified - old
426 partition will be dealt with in a
427 manner of 3.5.x */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428
429/* -o hash={tea, rupasov, r5, detect} is meant for properly mounting
430** reiserfs disks from 3.5.19 or earlier. 99% of the time, this option
431** is not required. If the normal autodection code can't determine which
Matt LaPlante0779bf22006-11-30 05:24:39 +0100432** hash to use (because both hashes had the same value for a file)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433** use this option to force a specific hash. It won't allow you to override
434** the existing hash on the FS, so if you have a tea hash disk, and mount
435** with -o hash=rupasov, the mount will fail.
436*/
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700437 FORCE_TEA_HASH, /* try to force tea hash on mount */
438 FORCE_RUPASOV_HASH, /* try to force rupasov hash on mount */
439 FORCE_R5_HASH, /* try to force rupasov hash on mount */
440 FORCE_HASH_DETECT, /* try to detect hash function on mount */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700442 REISERFS_DATA_LOG,
443 REISERFS_DATA_ORDERED,
444 REISERFS_DATA_WRITEBACK,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445
446/* used for testing experimental features, makes benchmarking new
447 features with and without more convenient, should never be used by
448 users in any code shipped to users (ideally) */
449
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700450 REISERFS_NO_BORDER,
451 REISERFS_NO_UNHASHED_RELOCATION,
452 REISERFS_HASHED_RELOCATION,
453 REISERFS_ATTRS,
454 REISERFS_XATTRS,
455 REISERFS_XATTRS_USER,
456 REISERFS_POSIXACL,
457 REISERFS_BARRIER_NONE,
458 REISERFS_BARRIER_FLUSH,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700460 /* Actions on error */
461 REISERFS_ERROR_PANIC,
462 REISERFS_ERROR_RO,
463 REISERFS_ERROR_CONTINUE,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700465 REISERFS_QUOTA, /* Some quota option specified */
Jan Kara556a2a42005-06-23 22:01:06 -0700466
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700467 REISERFS_TEST1,
468 REISERFS_TEST2,
469 REISERFS_TEST3,
470 REISERFS_TEST4,
471 REISERFS_UNSUPPORTED_OPT,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472};
473
474#define reiserfs_r5_hash(s) (REISERFS_SB(s)->s_mount_opt & (1 << FORCE_R5_HASH))
475#define reiserfs_rupasov_hash(s) (REISERFS_SB(s)->s_mount_opt & (1 << FORCE_RUPASOV_HASH))
476#define reiserfs_tea_hash(s) (REISERFS_SB(s)->s_mount_opt & (1 << FORCE_TEA_HASH))
477#define reiserfs_hash_detect(s) (REISERFS_SB(s)->s_mount_opt & (1 << FORCE_HASH_DETECT))
478#define reiserfs_no_border(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_NO_BORDER))
479#define reiserfs_no_unhashed_relocation(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_NO_UNHASHED_RELOCATION))
480#define reiserfs_hashed_relocation(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_HASHED_RELOCATION))
481#define reiserfs_test4(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_TEST4))
482
483#define have_large_tails(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_LARGETAIL))
484#define have_small_tails(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_SMALLTAIL))
485#define replay_only(s) (REISERFS_SB(s)->s_mount_opt & (1 << REPLAYONLY))
486#define reiserfs_attrs(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_ATTRS))
487#define old_format_only(s) (REISERFS_SB(s)->s_properties & (1 << REISERFS_3_5))
488#define convert_reiserfs(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_CONVERT))
489#define reiserfs_data_log(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_DATA_LOG))
490#define reiserfs_data_ordered(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_DATA_ORDERED))
491#define reiserfs_data_writeback(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_DATA_WRITEBACK))
492#define reiserfs_xattrs(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_XATTRS))
493#define reiserfs_xattrs_user(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_XATTRS_USER))
494#define reiserfs_posixacl(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_POSIXACL))
495#define reiserfs_xattrs_optional(s) (reiserfs_xattrs_user(s) || reiserfs_posixacl(s))
496#define reiserfs_barrier_none(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_BARRIER_NONE))
497#define reiserfs_barrier_flush(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_BARRIER_FLUSH))
498
499#define reiserfs_error_panic(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_ERROR_PANIC))
500#define reiserfs_error_ro(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_ERROR_RO))
501
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700502void reiserfs_file_buffer(struct buffer_head *bh, int list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503extern struct file_system_type reiserfs_fs_type;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700504int reiserfs_resize(struct super_block *, unsigned long);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505
506#define CARRY_ON 0
507#define SCHEDULE_OCCURRED 1
508
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509#define SB_BUFFER_WITH_SB(s) (REISERFS_SB(s)->s_sbh)
510#define SB_JOURNAL(s) (REISERFS_SB(s)->s_journal)
511#define SB_JOURNAL_1st_RESERVED_BLOCK(s) (SB_JOURNAL(s)->j_1st_reserved_block)
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700512#define SB_JOURNAL_LEN_FREE(s) (SB_JOURNAL(s)->j_journal_len_free)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513#define SB_AP_BITMAP(s) (REISERFS_SB(s)->s_ap_bitmap)
514
515#define SB_DISK_JOURNAL_HEAD(s) (SB_JOURNAL(s)->j_header_bh->)
516
517/* A safe version of the "bdevname", which returns the "s_id" field of
518 * a superblock or else "Null superblock" if the super block is NULL.
519 */
520static inline char *reiserfs_bdevname(struct super_block *s)
521{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700522 return (s == NULL) ? "Null superblock" : s->s_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523}
524
525#define reiserfs_is_journal_aborted(journal) (unlikely (__reiserfs_is_journal_aborted (journal)))
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700526static inline int __reiserfs_is_journal_aborted(struct reiserfs_journal
527 *journal)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700529 return test_bit(J_ABORTED, &journal->j_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530}
531
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700532#endif /* _LINUX_REISER_FS_SB */