Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* 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 | |
| 12 | typedef enum { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 13 | reiserfs_attrs_cleared = 0x00000001, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | } 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 Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 64 | #define set_sb_fs_state(sbp,v) ((sbp)->s_v1.s_fs_state = cpu_to_le16(v)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | #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 Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 106 | #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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | |
| 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 | */ |
| 119 | struct reiserfs_journal_cnode { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 120 | 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 */ |
| 123 | long state; |
| 124 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | }; |
| 130 | |
| 131 | struct reiserfs_bitmap_node { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 132 | int id; |
| 133 | char *data; |
| 134 | struct list_head list; |
| 135 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | |
| 137 | struct reiserfs_list_bitmap { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 138 | struct reiserfs_journal_list *journal_list; |
| 139 | struct reiserfs_bitmap_node **bitmaps; |
| 140 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | |
| 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 */ |
| 148 | struct reiserfs_journal_list { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 149 | 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 */ |
| 155 | struct semaphore j_commit_lock; |
| 156 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 165 | /* time ordered list of all transactions we haven't tried to flush yet */ |
| 166 | struct list_head j_working_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 168 | /* 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | |
| 175 | struct reiserfs_journal { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 176 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 180 | struct file *j_dev_file; |
| 181 | struct block_device *j_dev_bd; |
| 182 | int j_1st_reserved_block; /* first block on s_dev of reserved area journal */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 184 | long j_state; |
| 185 | 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) */ |
| 188 | unsigned long j_len; /* lenght of current waiting commit */ |
| 189 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 196 | time_t j_trans_start_time; /* time this transaction started */ |
| 197 | struct semaphore j_lock; |
| 198 | struct semaphore j_flush_sem; |
| 199 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 206 | int j_cnode_used; /* number of cnodes on the used list */ |
| 207 | int j_cnode_free; /* number of cnodes on the free list */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 209 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 215 | struct reiserfs_journal_cnode *j_cnode_free_list; |
| 216 | struct reiserfs_journal_cnode *j_cnode_free_orig; /* orig pointer returned from vmalloc */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 218 | struct reiserfs_journal_list *j_current_jl; |
| 219 | int j_free_bitmap_nodes; |
| 220 | int j_used_bitmap_nodes; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 222 | int j_num_lists; /* total number of active transactions */ |
| 223 | int j_num_work_lists; /* number that need attention from kreiserfsd */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 225 | /* debugging to make sure things are flushed in order */ |
| 226 | int j_last_flush_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 228 | /* debugging to make sure things are committed in order */ |
| 229 | int j_last_commit_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 231 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 235 | /* 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 240 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 249 | int j_errno; |
| 250 | |
| 251 | /* when flushing ordered buffers, throttle new ordered writers */ |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 252 | struct delayed_work j_work; |
| 253 | struct super_block *j_work_sb; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 254 | atomic_t j_async_throttle; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | }; |
| 256 | |
| 257 | enum journal_state_bits { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 258 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | }; |
| 262 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 263 | #define JOURNAL_DESC_MAGIC "ReIsErLB" /* ick. magic string to find desc blocks in the journal */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 265 | typedef __u32(*hashf_t) (const signed char *, int); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 267 | struct reiserfs_bitmap_info { |
| 268 | // FIXME: Won't work with block sizes > 8K |
| 269 | __u16 first_zero_hint; |
| 270 | __u16 free_count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | }; |
| 272 | |
| 273 | struct proc_dir_entry; |
| 274 | |
| 275 | #if defined( CONFIG_PROC_FS ) && defined( CONFIG_REISERFS_PROC_INFO ) |
| 276 | typedef unsigned long int stat_cnt_t; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 277 | typedef struct reiserfs_proc_info_data { |
| 278 | spinlock_t lock; |
| 279 | int exiting; |
| 280 | int max_hash_collisions; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 282 | stat_cnt_t breads; |
| 283 | stat_cnt_t bread_miss; |
| 284 | stat_cnt_t search_by_key; |
| 285 | stat_cnt_t search_by_key_fs_changed; |
| 286 | stat_cnt_t search_by_key_restarted; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 288 | stat_cnt_t insert_item_restarted; |
| 289 | stat_cnt_t paste_into_item_restarted; |
| 290 | stat_cnt_t cut_from_item_restarted; |
| 291 | stat_cnt_t delete_solid_item_restarted; |
| 292 | stat_cnt_t delete_item_restarted; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 294 | stat_cnt_t leaked_oid; |
| 295 | stat_cnt_t leaves_removable; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 297 | /* balances per level. Use explicit 5 as MAX_HEIGHT is not visible yet. */ |
| 298 | stat_cnt_t balance_at[5]; /* XXX */ |
| 299 | /* sbk == search_by_key */ |
| 300 | stat_cnt_t sbk_read_at[5]; /* XXX */ |
| 301 | stat_cnt_t sbk_fs_changed[5]; |
| 302 | stat_cnt_t sbk_restarted[5]; |
| 303 | stat_cnt_t items_at[5]; /* XXX */ |
| 304 | stat_cnt_t free_at[5]; /* XXX */ |
| 305 | stat_cnt_t can_node_be_removed[5]; /* XXX */ |
| 306 | long int lnum[5]; /* XXX */ |
| 307 | long int rnum[5]; /* XXX */ |
| 308 | long int lbytes[5]; /* XXX */ |
| 309 | long int rbytes[5]; /* XXX */ |
| 310 | stat_cnt_t get_neighbors[5]; |
| 311 | stat_cnt_t get_neighbors_restart[5]; |
| 312 | stat_cnt_t need_l_neighbor[5]; |
| 313 | stat_cnt_t need_r_neighbor[5]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 315 | stat_cnt_t free_block; |
| 316 | struct __scan_bitmap_stats { |
| 317 | stat_cnt_t call; |
| 318 | stat_cnt_t wait; |
| 319 | stat_cnt_t bmap; |
| 320 | stat_cnt_t retry; |
| 321 | stat_cnt_t in_journal_hint; |
| 322 | stat_cnt_t in_journal_nohint; |
| 323 | stat_cnt_t stolen; |
| 324 | } scan_bitmap; |
| 325 | struct __journal_stats { |
| 326 | stat_cnt_t in_journal; |
| 327 | stat_cnt_t in_journal_bitmap; |
| 328 | stat_cnt_t in_journal_reusable; |
| 329 | stat_cnt_t lock_journal; |
| 330 | stat_cnt_t lock_journal_wait; |
| 331 | stat_cnt_t journal_being; |
| 332 | stat_cnt_t journal_relock_writers; |
| 333 | stat_cnt_t journal_relock_wcount; |
| 334 | stat_cnt_t mark_dirty; |
| 335 | stat_cnt_t mark_dirty_already; |
| 336 | stat_cnt_t mark_dirty_notjournal; |
| 337 | stat_cnt_t restore_prepared; |
| 338 | stat_cnt_t prepare; |
| 339 | stat_cnt_t prepare_retry; |
| 340 | } journal; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | } reiserfs_proc_info_data_t; |
| 342 | #else |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 343 | typedef struct reiserfs_proc_info_data { |
| 344 | } reiserfs_proc_info_data_t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | #endif |
| 346 | |
| 347 | /* reiserfs union of in-core super block data */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 348 | struct reiserfs_sb_info { |
| 349 | struct buffer_head *s_sbh; /* Buffer containing the super block */ |
| 350 | /* both the comment and the choice of |
| 351 | name are unclear for s_rs -Hans */ |
| 352 | struct reiserfs_super_block *s_rs; /* Pointer to the super block in the buffer */ |
| 353 | struct reiserfs_bitmap_info *s_ap_bitmap; |
| 354 | struct reiserfs_journal *s_journal; /* pointer to journal information */ |
| 355 | unsigned short s_mount_state; /* reiserfs state (valid, invalid) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 357 | /* Comment? -Hans */ |
| 358 | void (*end_io_handler) (struct buffer_head *, int); |
| 359 | hashf_t s_hash_function; /* pointer to function which is used |
| 360 | to sort names in directory. Set on |
| 361 | mount */ |
| 362 | unsigned long s_mount_opt; /* reiserfs's mount options are set |
| 363 | here (currently - NOTAIL, NOLOG, |
| 364 | REPLAYONLY) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 366 | struct { /* This is a structure that describes block allocator options */ |
| 367 | unsigned long bits; /* Bitfield for enable/disable kind of options */ |
| 368 | unsigned long large_file_size; /* size started from which we consider file to be a large one(in blocks) */ |
| 369 | int border; /* percentage of disk, border takes */ |
| 370 | int preallocmin; /* Minimal file size (in blocks) starting from which we do preallocations */ |
| 371 | int preallocsize; /* Number of blocks we try to prealloc when file |
| 372 | reaches preallocmin size (in blocks) or |
| 373 | prealloc_list is empty. */ |
| 374 | } s_alloc_options; |
| 375 | |
| 376 | /* Comment? -Hans */ |
| 377 | wait_queue_head_t s_wait; |
| 378 | /* To be obsoleted soon by per buffer seals.. -Hans */ |
| 379 | atomic_t s_generation_counter; // increased by one every time the |
| 380 | // tree gets re-balanced |
| 381 | unsigned long s_properties; /* File system properties. Currently holds |
| 382 | on-disk FS format */ |
| 383 | |
| 384 | /* session statistics */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 385 | int s_disk_reads; |
| 386 | int s_disk_writes; |
| 387 | int s_fix_nodes; |
| 388 | int s_do_balance; |
| 389 | int s_unneeded_left_neighbor; |
| 390 | int s_good_search_by_key_reada; |
| 391 | int s_bmaps; |
| 392 | int s_bmaps_without_search; |
| 393 | int s_direct2indirect; |
| 394 | int s_indirect2direct; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | /* set up when it's ok for reiserfs_read_inode2() to read from |
| 396 | disk inode with nlink==0. Currently this is only used during |
| 397 | finish_unfinished() processing at mount time */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 398 | int s_is_unlinked_ok; |
| 399 | reiserfs_proc_info_data_t s_proc_info_data; |
| 400 | struct proc_dir_entry *procdir; |
| 401 | int reserved_blocks; /* amount of blocks reserved for further allocations */ |
| 402 | spinlock_t bitmap_lock; /* this lock on now only used to protect reserved_blocks variable */ |
| 403 | struct dentry *priv_root; /* root of /.reiserfs_priv */ |
| 404 | struct dentry *xattr_root; /* root of /.reiserfs_priv/.xa */ |
| 405 | struct rw_semaphore xattr_dir_sem; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 407 | int j_errno; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | #ifdef CONFIG_QUOTA |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 409 | char *s_qf_names[MAXQUOTAS]; |
| 410 | int s_jquota_fmt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | #endif |
| 412 | }; |
| 413 | |
| 414 | /* Definitions of reiserfs on-disk properties: */ |
| 415 | #define REISERFS_3_5 0 |
| 416 | #define REISERFS_3_6 1 |
Jeff Mahoney | e1fabd3 | 2006-09-30 23:28:40 -0700 | [diff] [blame] | 417 | #define REISERFS_OLD_FORMAT 2 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | |
| 419 | enum reiserfs_mount_options { |
| 420 | /* Mount options */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 421 | REISERFS_LARGETAIL, /* large tails will be created in a session */ |
| 422 | REISERFS_SMALLTAIL, /* small (for files less than block size) tails will be created in a session */ |
| 423 | REPLAYONLY, /* replay journal and return 0. Use by fsck */ |
| 424 | REISERFS_CONVERT, /* -o conv: causes conversion of old |
| 425 | format super block to the new |
| 426 | format. If not specified - old |
| 427 | partition will be dealt with in a |
| 428 | manner of 3.5.x */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | |
| 430 | /* -o hash={tea, rupasov, r5, detect} is meant for properly mounting |
| 431 | ** reiserfs disks from 3.5.19 or earlier. 99% of the time, this option |
| 432 | ** is not required. If the normal autodection code can't determine which |
Matt LaPlante | 0779bf2 | 2006-11-30 05:24:39 +0100 | [diff] [blame] | 433 | ** hash to use (because both hashes had the same value for a file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | ** use this option to force a specific hash. It won't allow you to override |
| 435 | ** the existing hash on the FS, so if you have a tea hash disk, and mount |
| 436 | ** with -o hash=rupasov, the mount will fail. |
| 437 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 438 | FORCE_TEA_HASH, /* try to force tea hash on mount */ |
| 439 | FORCE_RUPASOV_HASH, /* try to force rupasov hash on mount */ |
| 440 | FORCE_R5_HASH, /* try to force rupasov hash on mount */ |
| 441 | FORCE_HASH_DETECT, /* try to detect hash function on mount */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 443 | REISERFS_DATA_LOG, |
| 444 | REISERFS_DATA_ORDERED, |
| 445 | REISERFS_DATA_WRITEBACK, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | |
| 447 | /* used for testing experimental features, makes benchmarking new |
| 448 | features with and without more convenient, should never be used by |
| 449 | users in any code shipped to users (ideally) */ |
| 450 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 451 | REISERFS_NO_BORDER, |
| 452 | REISERFS_NO_UNHASHED_RELOCATION, |
| 453 | REISERFS_HASHED_RELOCATION, |
| 454 | REISERFS_ATTRS, |
| 455 | REISERFS_XATTRS, |
| 456 | REISERFS_XATTRS_USER, |
| 457 | REISERFS_POSIXACL, |
| 458 | REISERFS_BARRIER_NONE, |
| 459 | REISERFS_BARRIER_FLUSH, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 461 | /* Actions on error */ |
| 462 | REISERFS_ERROR_PANIC, |
| 463 | REISERFS_ERROR_RO, |
| 464 | REISERFS_ERROR_CONTINUE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 466 | REISERFS_QUOTA, /* Some quota option specified */ |
Jan Kara | 556a2a4 | 2005-06-23 22:01:06 -0700 | [diff] [blame] | 467 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 468 | REISERFS_TEST1, |
| 469 | REISERFS_TEST2, |
| 470 | REISERFS_TEST3, |
| 471 | REISERFS_TEST4, |
| 472 | REISERFS_UNSUPPORTED_OPT, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | }; |
| 474 | |
| 475 | #define reiserfs_r5_hash(s) (REISERFS_SB(s)->s_mount_opt & (1 << FORCE_R5_HASH)) |
| 476 | #define reiserfs_rupasov_hash(s) (REISERFS_SB(s)->s_mount_opt & (1 << FORCE_RUPASOV_HASH)) |
| 477 | #define reiserfs_tea_hash(s) (REISERFS_SB(s)->s_mount_opt & (1 << FORCE_TEA_HASH)) |
| 478 | #define reiserfs_hash_detect(s) (REISERFS_SB(s)->s_mount_opt & (1 << FORCE_HASH_DETECT)) |
| 479 | #define reiserfs_no_border(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_NO_BORDER)) |
| 480 | #define reiserfs_no_unhashed_relocation(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_NO_UNHASHED_RELOCATION)) |
| 481 | #define reiserfs_hashed_relocation(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_HASHED_RELOCATION)) |
| 482 | #define reiserfs_test4(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_TEST4)) |
| 483 | |
| 484 | #define have_large_tails(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_LARGETAIL)) |
| 485 | #define have_small_tails(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_SMALLTAIL)) |
| 486 | #define replay_only(s) (REISERFS_SB(s)->s_mount_opt & (1 << REPLAYONLY)) |
| 487 | #define reiserfs_attrs(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_ATTRS)) |
| 488 | #define old_format_only(s) (REISERFS_SB(s)->s_properties & (1 << REISERFS_3_5)) |
| 489 | #define convert_reiserfs(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_CONVERT)) |
| 490 | #define reiserfs_data_log(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_DATA_LOG)) |
| 491 | #define reiserfs_data_ordered(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_DATA_ORDERED)) |
| 492 | #define reiserfs_data_writeback(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_DATA_WRITEBACK)) |
| 493 | #define reiserfs_xattrs(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_XATTRS)) |
| 494 | #define reiserfs_xattrs_user(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_XATTRS_USER)) |
| 495 | #define reiserfs_posixacl(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_POSIXACL)) |
| 496 | #define reiserfs_xattrs_optional(s) (reiserfs_xattrs_user(s) || reiserfs_posixacl(s)) |
| 497 | #define reiserfs_barrier_none(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_BARRIER_NONE)) |
| 498 | #define reiserfs_barrier_flush(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_BARRIER_FLUSH)) |
| 499 | |
| 500 | #define reiserfs_error_panic(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_ERROR_PANIC)) |
| 501 | #define reiserfs_error_ro(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_ERROR_RO)) |
| 502 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 503 | void reiserfs_file_buffer(struct buffer_head *bh, int list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | extern struct file_system_type reiserfs_fs_type; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 505 | int reiserfs_resize(struct super_block *, unsigned long); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | |
| 507 | #define CARRY_ON 0 |
| 508 | #define SCHEDULE_OCCURRED 1 |
| 509 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | #define SB_BUFFER_WITH_SB(s) (REISERFS_SB(s)->s_sbh) |
| 511 | #define SB_JOURNAL(s) (REISERFS_SB(s)->s_journal) |
| 512 | #define SB_JOURNAL_1st_RESERVED_BLOCK(s) (SB_JOURNAL(s)->j_1st_reserved_block) |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 513 | #define SB_JOURNAL_LEN_FREE(s) (SB_JOURNAL(s)->j_journal_len_free) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | #define SB_AP_BITMAP(s) (REISERFS_SB(s)->s_ap_bitmap) |
| 515 | |
| 516 | #define SB_DISK_JOURNAL_HEAD(s) (SB_JOURNAL(s)->j_header_bh->) |
| 517 | |
| 518 | /* A safe version of the "bdevname", which returns the "s_id" field of |
| 519 | * a superblock or else "Null superblock" if the super block is NULL. |
| 520 | */ |
| 521 | static inline char *reiserfs_bdevname(struct super_block *s) |
| 522 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 523 | return (s == NULL) ? "Null superblock" : s->s_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | } |
| 525 | |
| 526 | #define reiserfs_is_journal_aborted(journal) (unlikely (__reiserfs_is_journal_aborted (journal))) |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 527 | static inline int __reiserfs_is_journal_aborted(struct reiserfs_journal |
| 528 | *journal) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 530 | return test_bit(J_ABORTED, &journal->j_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | } |
| 532 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 533 | #endif /* _LINUX_REISER_FS_SB */ |