Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1 | /* -*- mode: c; c-basic-offset: 8; -*- |
| 2 | * vim: noexpandtab sw=8 ts=8 sts=0: |
| 3 | * |
| 4 | * ocfs2.h |
| 5 | * |
| 6 | * Defines macros and structures used in OCFS2 |
| 7 | * |
| 8 | * Copyright (C) 2002, 2004 Oracle. All rights reserved. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or |
| 11 | * modify it under the terms of the GNU General Public |
| 12 | * License as published by the Free Software Foundation; either |
| 13 | * version 2 of the License, or (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 18 | * General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public |
| 21 | * License along with this program; if not, write to the |
| 22 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 23 | * Boston, MA 021110-1307, USA. |
| 24 | */ |
| 25 | |
| 26 | #ifndef OCFS2_H |
| 27 | #define OCFS2_H |
| 28 | |
| 29 | #include <linux/spinlock.h> |
| 30 | #include <linux/sched.h> |
| 31 | #include <linux/wait.h> |
| 32 | #include <linux/list.h> |
| 33 | #include <linux/rbtree.h> |
| 34 | #include <linux/workqueue.h> |
| 35 | #include <linux/kref.h> |
Arjan van de Ven | c74ec2f | 2006-01-13 21:54:23 -0800 | [diff] [blame] | 36 | #include <linux/mutex.h> |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 37 | #include <linux/jbd.h> |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 38 | |
Joel Becker | 8f2c9c1 | 2008-02-01 12:16:57 -0800 | [diff] [blame] | 39 | /* For union ocfs2_dlm_lksb */ |
| 40 | #include "stackglue.h" |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 41 | |
| 42 | #include "ocfs2_fs.h" |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 43 | #include "ocfs2_lockid.h" |
| 44 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 45 | /* Most user visible OCFS2 inodes will have very few pieces of |
| 46 | * metadata, but larger files (including bitmaps, etc) must be taken |
| 47 | * into account when designing an access scheme. We allow a small |
| 48 | * amount of inlined blocks to be stored on an array and grow the |
| 49 | * structure into a rb tree when necessary. */ |
| 50 | #define OCFS2_INODE_MAX_CACHE_ARRAY 2 |
| 51 | |
| 52 | struct ocfs2_caching_info { |
| 53 | unsigned int ci_num_cached; |
| 54 | union { |
| 55 | sector_t ci_array[OCFS2_INODE_MAX_CACHE_ARRAY]; |
| 56 | struct rb_root ci_tree; |
| 57 | } ci_cache; |
| 58 | }; |
| 59 | |
| 60 | /* this limits us to 256 nodes |
| 61 | * if we need more, we can do a kmalloc for the map */ |
| 62 | #define OCFS2_NODE_MAP_MAX_NODES 256 |
| 63 | struct ocfs2_node_map { |
| 64 | u16 num_nodes; |
| 65 | unsigned long map[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES)]; |
| 66 | }; |
| 67 | |
| 68 | enum ocfs2_ast_action { |
| 69 | OCFS2_AST_INVALID = 0, |
| 70 | OCFS2_AST_ATTACH, |
| 71 | OCFS2_AST_CONVERT, |
| 72 | OCFS2_AST_DOWNCONVERT, |
| 73 | }; |
| 74 | |
| 75 | /* actions for an unlockast function to take. */ |
| 76 | enum ocfs2_unlock_action { |
| 77 | OCFS2_UNLOCK_INVALID = 0, |
| 78 | OCFS2_UNLOCK_CANCEL_CONVERT, |
| 79 | OCFS2_UNLOCK_DROP_LOCK, |
| 80 | }; |
| 81 | |
| 82 | /* ocfs2_lock_res->l_flags flags. */ |
| 83 | #define OCFS2_LOCK_ATTACHED (0x00000001) /* have we initialized |
| 84 | * the lvb */ |
| 85 | #define OCFS2_LOCK_BUSY (0x00000002) /* we are currently in |
| 86 | * dlm_lock */ |
| 87 | #define OCFS2_LOCK_BLOCKED (0x00000004) /* blocked waiting to |
| 88 | * downconvert*/ |
| 89 | #define OCFS2_LOCK_LOCAL (0x00000008) /* newly created inode */ |
| 90 | #define OCFS2_LOCK_NEEDS_REFRESH (0x00000010) |
| 91 | #define OCFS2_LOCK_REFRESHING (0x00000020) |
| 92 | #define OCFS2_LOCK_INITIALIZED (0x00000040) /* track initialization |
| 93 | * for shutdown paths */ |
| 94 | #define OCFS2_LOCK_FREEING (0x00000080) /* help dlmglue track |
| 95 | * when to skip queueing |
| 96 | * a lock because it's |
| 97 | * about to be |
| 98 | * dropped. */ |
| 99 | #define OCFS2_LOCK_QUEUED (0x00000100) /* queued for downconvert */ |
Mark Fasheh | cf8e06f | 2007-12-20 16:43:10 -0800 | [diff] [blame] | 100 | #define OCFS2_LOCK_NOCACHE (0x00000200) /* don't use a holder count */ |
Joel Becker | de55124 | 2008-02-01 14:45:08 -0800 | [diff] [blame] | 101 | #define OCFS2_LOCK_PENDING (0x00000400) /* This lockres is pending a |
| 102 | call to dlm_lock. Only |
| 103 | exists with BUSY set. */ |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 104 | |
| 105 | struct ocfs2_lock_res_ops; |
| 106 | |
| 107 | typedef void (*ocfs2_lock_callback)(int status, unsigned long data); |
| 108 | |
| 109 | struct ocfs2_lock_res { |
| 110 | void *l_priv; |
| 111 | struct ocfs2_lock_res_ops *l_ops; |
| 112 | spinlock_t l_lock; |
| 113 | |
| 114 | struct list_head l_blocked_list; |
| 115 | struct list_head l_mask_waiters; |
| 116 | |
| 117 | enum ocfs2_lock_type l_type; |
| 118 | unsigned long l_flags; |
| 119 | char l_name[OCFS2_LOCK_ID_MAX_LEN]; |
| 120 | int l_level; |
| 121 | unsigned int l_ro_holders; |
| 122 | unsigned int l_ex_holders; |
Joel Becker | 8f2c9c1 | 2008-02-01 12:16:57 -0800 | [diff] [blame] | 123 | union ocfs2_dlm_lksb l_lksb; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 124 | |
| 125 | /* used from AST/BAST funcs. */ |
| 126 | enum ocfs2_ast_action l_action; |
| 127 | enum ocfs2_unlock_action l_unlock_action; |
| 128 | int l_requested; |
| 129 | int l_blocking; |
Joel Becker | de55124 | 2008-02-01 14:45:08 -0800 | [diff] [blame] | 130 | unsigned int l_pending_gen; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 131 | |
| 132 | wait_queue_head_t l_event; |
| 133 | |
| 134 | struct list_head l_debug_list; |
Sunil Mushran | 8ddb7b0 | 2008-05-13 13:45:15 -0700 | [diff] [blame] | 135 | |
| 136 | #ifdef CONFIG_OCFS2_FS_STATS |
| 137 | unsigned long long l_lock_num_prmode; /* PR acquires */ |
| 138 | unsigned long long l_lock_num_exmode; /* EX acquires */ |
| 139 | unsigned int l_lock_num_prmode_failed; /* Failed PR gets */ |
| 140 | unsigned int l_lock_num_exmode_failed; /* Failed EX gets */ |
| 141 | unsigned long long l_lock_total_prmode; /* Tot wait for PR */ |
| 142 | unsigned long long l_lock_total_exmode; /* Tot wait for EX */ |
| 143 | unsigned int l_lock_max_prmode; /* Max wait for PR */ |
| 144 | unsigned int l_lock_max_exmode; /* Max wait for EX */ |
| 145 | unsigned int l_lock_refresh; /* Disk refreshes */ |
| 146 | #endif |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 147 | }; |
| 148 | |
| 149 | struct ocfs2_dlm_debug { |
| 150 | struct kref d_refcnt; |
| 151 | struct dentry *d_locking_state; |
| 152 | struct list_head d_lockres_tracking; |
| 153 | }; |
| 154 | |
| 155 | enum ocfs2_vol_state |
| 156 | { |
| 157 | VOLUME_INIT = 0, |
| 158 | VOLUME_MOUNTED, |
| 159 | VOLUME_DISMOUNTED, |
| 160 | VOLUME_DISABLED |
| 161 | }; |
| 162 | |
| 163 | struct ocfs2_alloc_stats |
| 164 | { |
| 165 | atomic_t moves; |
| 166 | atomic_t local_data; |
| 167 | atomic_t bitmap_data; |
| 168 | atomic_t bg_allocs; |
| 169 | atomic_t bg_extends; |
| 170 | }; |
| 171 | |
| 172 | enum ocfs2_local_alloc_state |
| 173 | { |
Mark Fasheh | 9c7af40 | 2008-07-28 18:02:53 -0700 | [diff] [blame] | 174 | OCFS2_LA_UNUSED = 0, /* Local alloc will never be used for |
| 175 | * this mountpoint. */ |
| 176 | OCFS2_LA_ENABLED, /* Local alloc is in use. */ |
| 177 | OCFS2_LA_THROTTLED, /* Local alloc is in use, but number |
| 178 | * of bits has been reduced. */ |
| 179 | OCFS2_LA_DISABLED /* Local alloc has temporarily been |
| 180 | * disabled. */ |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 181 | }; |
| 182 | |
| 183 | enum ocfs2_mount_options |
| 184 | { |
| 185 | OCFS2_MOUNT_HB_LOCAL = 1 << 0, /* Heartbeat started in local mode */ |
| 186 | OCFS2_MOUNT_BARRIER = 1 << 1, /* Use block barriers */ |
| 187 | OCFS2_MOUNT_NOINTR = 1 << 2, /* Don't catch signals */ |
| 188 | OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */ |
| 189 | OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */ |
Mark Fasheh | 53fc622 | 2007-12-20 16:49:04 -0800 | [diff] [blame] | 190 | OCFS2_MOUNT_LOCALFLOCKS = 1 << 5, /* No cluster aware user file locks */ |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 191 | OCFS2_MOUNT_NOUSERXATTR = 1 << 6, /* No user xattr */ |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 192 | }; |
| 193 | |
| 194 | #define OCFS2_OSB_SOFT_RO 0x0001 |
| 195 | #define OCFS2_OSB_HARD_RO 0x0002 |
| 196 | #define OCFS2_OSB_ERROR_FS 0x0004 |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 197 | #define OCFS2_DEFAULT_ATIME_QUANTUM 60 |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 198 | |
| 199 | struct ocfs2_journal; |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 200 | struct ocfs2_slot_info; |
Joel Becker | 553abd0 | 2008-02-01 12:03:57 -0800 | [diff] [blame] | 201 | struct ocfs2_recovery_map; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 202 | struct ocfs2_super |
| 203 | { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 204 | struct task_struct *commit_task; |
| 205 | struct super_block *sb; |
| 206 | struct inode *root_inode; |
| 207 | struct inode *sys_root_inode; |
| 208 | struct inode *system_inodes[NUM_SYSTEM_INODES]; |
| 209 | |
| 210 | struct ocfs2_slot_info *slot_info; |
| 211 | |
Sunil Mushran | 539d826 | 2008-07-14 17:31:10 -0700 | [diff] [blame] | 212 | u32 *slot_recovery_generations; |
| 213 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 214 | spinlock_t node_map_lock; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 215 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 216 | u64 root_blkno; |
| 217 | u64 system_dir_blkno; |
| 218 | u64 bitmap_blkno; |
| 219 | u32 bitmap_cpg; |
| 220 | u8 *uuid; |
| 221 | char *uuid_str; |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 222 | u32 uuid_hash; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 223 | u8 *vol_label; |
| 224 | u64 first_cluster_group_blkno; |
| 225 | u32 fs_generation; |
| 226 | |
| 227 | u32 s_feature_compat; |
| 228 | u32 s_feature_incompat; |
| 229 | u32 s_feature_ro_compat; |
| 230 | |
Tao Ma | 4d0ddb2 | 2008-03-05 16:11:46 +0800 | [diff] [blame] | 231 | /* Protects s_next_generation, osb_flags and s_inode_steal_slot. |
| 232 | * Could protect more on osb as it's very short lived. |
| 233 | */ |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 234 | spinlock_t osb_lock; |
| 235 | u32 s_next_generation; |
| 236 | unsigned long osb_flags; |
Tao Ma | 4d0ddb2 | 2008-03-05 16:11:46 +0800 | [diff] [blame] | 237 | s16 s_inode_steal_slot; |
| 238 | atomic_t s_num_inodes_stolen; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 239 | |
| 240 | unsigned long s_mount_opt; |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 241 | unsigned int s_atime_quantum; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 242 | |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 243 | unsigned int max_slots; |
Joel Becker | 19fdb62 | 2008-01-30 15:38:24 -0800 | [diff] [blame] | 244 | unsigned int node_num; |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 245 | int slot_num; |
| 246 | int preferred_slot; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 247 | int s_sectsize_bits; |
| 248 | int s_clustersize; |
| 249 | int s_clustersize_bits; |
Tiger Yang | fdd7770 | 2008-08-18 17:08:55 +0800 | [diff] [blame] | 250 | unsigned int s_xattr_inline_size; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 251 | |
| 252 | atomic_t vol_state; |
Arjan van de Ven | c74ec2f | 2006-01-13 21:54:23 -0800 | [diff] [blame] | 253 | struct mutex recovery_lock; |
Joel Becker | 553abd0 | 2008-02-01 12:03:57 -0800 | [diff] [blame] | 254 | struct ocfs2_recovery_map *recovery_map; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 255 | struct task_struct *recovery_thread_task; |
| 256 | int disable_recovery; |
| 257 | wait_queue_head_t checkpoint_event; |
| 258 | atomic_t needs_checkpoint; |
| 259 | struct ocfs2_journal *journal; |
Mark Fasheh | d147b3d | 2007-11-07 14:40:36 -0800 | [diff] [blame] | 260 | unsigned long osb_commit_interval; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 261 | |
Mark Fasheh | 9c7af40 | 2008-07-28 18:02:53 -0700 | [diff] [blame] | 262 | struct delayed_work la_enable_wq; |
| 263 | |
| 264 | /* |
| 265 | * Must hold local alloc i_mutex and osb->osb_lock to change |
| 266 | * local_alloc_bits. Reads can be done under either lock. |
| 267 | */ |
Mark Fasheh | ebcee4b | 2008-07-28 14:55:20 -0700 | [diff] [blame] | 268 | unsigned int local_alloc_bits; |
Mark Fasheh | 9c7af40 | 2008-07-28 18:02:53 -0700 | [diff] [blame] | 269 | unsigned int local_alloc_default_bits; |
| 270 | |
| 271 | enum ocfs2_local_alloc_state local_alloc_state; /* protected |
| 272 | * by osb_lock */ |
| 273 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 274 | struct buffer_head *local_alloc_bh; |
Mark Fasheh | 9c7af40 | 2008-07-28 18:02:53 -0700 | [diff] [blame] | 275 | |
Mark Fasheh | 883d4ca | 2006-06-05 16:41:00 -0400 | [diff] [blame] | 276 | u64 la_last_gd; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 277 | |
Mark Fasheh | 9a8ff57 | 2008-07-29 18:29:18 -0700 | [diff] [blame] | 278 | #ifdef CONFIG_OCFS2_FS_STATS |
| 279 | struct dentry *local_alloc_debug; |
| 280 | char *local_alloc_debug_buf; |
| 281 | #endif |
| 282 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 283 | /* Next two fields are for local node slot recovery during |
| 284 | * mount. */ |
| 285 | int dirty; |
| 286 | struct ocfs2_dinode *local_alloc_copy; |
| 287 | |
| 288 | struct ocfs2_alloc_stats alloc_stats; |
| 289 | char dev_str[20]; /* "major,minor" of the device */ |
| 290 | |
Joel Becker | b61817e | 2008-02-01 15:08:23 -0800 | [diff] [blame] | 291 | char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; |
Joel Becker | 4670c46 | 2008-02-01 14:39:35 -0800 | [diff] [blame] | 292 | struct ocfs2_cluster_connection *cconn; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 293 | struct ocfs2_lock_res osb_super_lockres; |
| 294 | struct ocfs2_lock_res osb_rename_lockres; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 295 | struct ocfs2_dlm_debug *osb_dlm_debug; |
| 296 | |
| 297 | struct dentry *osb_debug_root; |
| 298 | |
| 299 | wait_queue_head_t recovery_event; |
| 300 | |
Mark Fasheh | 34d024f | 2007-09-24 15:56:19 -0700 | [diff] [blame] | 301 | spinlock_t dc_task_lock; |
| 302 | struct task_struct *dc_task; |
| 303 | wait_queue_head_t dc_event; |
| 304 | unsigned long dc_wake_sequence; |
| 305 | unsigned long dc_work_sequence; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 306 | |
Mark Fasheh | 7ec373c | 2008-01-23 16:54:48 -0800 | [diff] [blame] | 307 | /* |
| 308 | * Any thread can add locks to the list, but the downconvert |
| 309 | * thread is the only one allowed to remove locks. Any change |
| 310 | * to this rule requires updating |
| 311 | * ocfs2_downconvert_thread_do_work(). |
| 312 | */ |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 313 | struct list_head blocked_lock_list; |
| 314 | unsigned long blocked_lock_count; |
| 315 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 316 | wait_queue_head_t osb_mount_event; |
| 317 | |
| 318 | /* Truncate log info */ |
| 319 | struct inode *osb_tl_inode; |
| 320 | struct buffer_head *osb_tl_bh; |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 321 | struct delayed_work osb_truncate_log_wq; |
Mark Fasheh | b4df6ed | 2006-02-22 17:35:08 -0800 | [diff] [blame] | 322 | |
| 323 | struct ocfs2_node_map osb_recovering_orphan_dirs; |
| 324 | unsigned int *osb_orphan_wipes; |
| 325 | wait_queue_head_t osb_wipe_event; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 326 | }; |
| 327 | |
| 328 | #define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 329 | |
| 330 | static inline int ocfs2_should_order_data(struct inode *inode) |
| 331 | { |
| 332 | if (!S_ISREG(inode->i_mode)) |
| 333 | return 0; |
| 334 | if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) |
| 335 | return 0; |
| 336 | return 1; |
| 337 | } |
| 338 | |
Mark Fasheh | dcd0538 | 2007-01-16 11:32:23 -0800 | [diff] [blame] | 339 | static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb) |
| 340 | { |
| 341 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC) |
| 342 | return 1; |
| 343 | return 0; |
| 344 | } |
| 345 | |
Mark Fasheh | 328d575 | 2007-06-18 10:48:04 -0700 | [diff] [blame] | 346 | static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb) |
| 347 | { |
| 348 | /* |
| 349 | * Support for sparse files is a pre-requisite |
| 350 | */ |
| 351 | if (!ocfs2_sparse_alloc(osb)) |
| 352 | return 0; |
| 353 | |
| 354 | if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN) |
| 355 | return 1; |
| 356 | return 0; |
| 357 | } |
| 358 | |
Mark Fasheh | 15b1e36 | 2007-09-07 13:58:15 -0700 | [diff] [blame] | 359 | static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb) |
| 360 | { |
| 361 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA) |
| 362 | return 1; |
| 363 | return 0; |
| 364 | } |
| 365 | |
Tiger Yang | 8154da3 | 2008-08-18 17:11:46 +0800 | [diff] [blame^] | 366 | static inline int ocfs2_supports_xattr(struct ocfs2_super *osb) |
| 367 | { |
| 368 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR) |
| 369 | return 1; |
| 370 | return 0; |
| 371 | } |
| 372 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 373 | /* set / clear functions because cluster events can make these happen |
| 374 | * in parallel so we want the transitions to be atomic. this also |
| 375 | * means that any future flags osb_flags must be protected by spinlock |
| 376 | * too! */ |
| 377 | static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb, |
| 378 | unsigned long flag) |
| 379 | { |
| 380 | spin_lock(&osb->osb_lock); |
| 381 | osb->osb_flags |= flag; |
| 382 | spin_unlock(&osb->osb_lock); |
| 383 | } |
| 384 | |
| 385 | static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb, |
| 386 | int hard) |
| 387 | { |
| 388 | spin_lock(&osb->osb_lock); |
| 389 | osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO); |
| 390 | if (hard) |
| 391 | osb->osb_flags |= OCFS2_OSB_HARD_RO; |
| 392 | else |
| 393 | osb->osb_flags |= OCFS2_OSB_SOFT_RO; |
| 394 | spin_unlock(&osb->osb_lock); |
| 395 | } |
| 396 | |
| 397 | static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb) |
| 398 | { |
| 399 | int ret; |
| 400 | |
| 401 | spin_lock(&osb->osb_lock); |
| 402 | ret = osb->osb_flags & OCFS2_OSB_HARD_RO; |
| 403 | spin_unlock(&osb->osb_lock); |
| 404 | |
| 405 | return ret; |
| 406 | } |
| 407 | |
| 408 | static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb) |
| 409 | { |
| 410 | int ret; |
| 411 | |
| 412 | spin_lock(&osb->osb_lock); |
| 413 | ret = osb->osb_flags & OCFS2_OSB_SOFT_RO; |
| 414 | spin_unlock(&osb->osb_lock); |
| 415 | |
| 416 | return ret; |
| 417 | } |
| 418 | |
Joel Becker | b61817e | 2008-02-01 15:08:23 -0800 | [diff] [blame] | 419 | static inline int ocfs2_userspace_stack(struct ocfs2_super *osb) |
| 420 | { |
| 421 | return (osb->s_feature_incompat & |
| 422 | OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK); |
| 423 | } |
| 424 | |
Sunil Mushran | c271c5c | 2006-12-05 17:56:35 -0800 | [diff] [blame] | 425 | static inline int ocfs2_mount_local(struct ocfs2_super *osb) |
| 426 | { |
| 427 | return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT); |
| 428 | } |
| 429 | |
Joel Becker | 386a2ef | 2008-02-01 12:06:54 -0800 | [diff] [blame] | 430 | static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb) |
| 431 | { |
| 432 | return (osb->s_feature_incompat & |
| 433 | OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP); |
| 434 | } |
| 435 | |
| 436 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 437 | #define OCFS2_IS_VALID_DINODE(ptr) \ |
| 438 | (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE)) |
| 439 | |
| 440 | #define OCFS2_RO_ON_INVALID_DINODE(__sb, __di) do { \ |
| 441 | typeof(__di) ____di = (__di); \ |
| 442 | ocfs2_error((__sb), \ |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 443 | "Dinode # %llu has bad signature %.*s", \ |
Mark Fasheh | 1ca1a11 | 2007-04-27 16:01:25 -0700 | [diff] [blame] | 444 | (unsigned long long)le64_to_cpu((____di)->i_blkno), 7, \ |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 445 | (____di)->i_signature); \ |
Mark Fasheh | 1ca1a11 | 2007-04-27 16:01:25 -0700 | [diff] [blame] | 446 | } while (0) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 447 | |
| 448 | #define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \ |
| 449 | (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE)) |
| 450 | |
| 451 | #define OCFS2_RO_ON_INVALID_EXTENT_BLOCK(__sb, __eb) do { \ |
| 452 | typeof(__eb) ____eb = (__eb); \ |
| 453 | ocfs2_error((__sb), \ |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 454 | "Extent Block # %llu has bad signature %.*s", \ |
Mark Fasheh | 1ca1a11 | 2007-04-27 16:01:25 -0700 | [diff] [blame] | 455 | (unsigned long long)le64_to_cpu((____eb)->h_blkno), 7, \ |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 456 | (____eb)->h_signature); \ |
Mark Fasheh | 1ca1a11 | 2007-04-27 16:01:25 -0700 | [diff] [blame] | 457 | } while (0) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 458 | |
| 459 | #define OCFS2_IS_VALID_GROUP_DESC(ptr) \ |
| 460 | (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE)) |
| 461 | |
| 462 | #define OCFS2_RO_ON_INVALID_GROUP_DESC(__sb, __gd) do { \ |
| 463 | typeof(__gd) ____gd = (__gd); \ |
| 464 | ocfs2_error((__sb), \ |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 465 | "Group Descriptor # %llu has bad signature %.*s", \ |
Mark Fasheh | 1ca1a11 | 2007-04-27 16:01:25 -0700 | [diff] [blame] | 466 | (unsigned long long)le64_to_cpu((____gd)->bg_blkno), 7, \ |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 467 | (____gd)->bg_signature); \ |
Mark Fasheh | 1ca1a11 | 2007-04-27 16:01:25 -0700 | [diff] [blame] | 468 | } while (0) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 469 | |
| 470 | static inline unsigned long ino_from_blkno(struct super_block *sb, |
| 471 | u64 blkno) |
| 472 | { |
| 473 | return (unsigned long)(blkno & (u64)ULONG_MAX); |
| 474 | } |
| 475 | |
| 476 | static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb, |
| 477 | u32 clusters) |
| 478 | { |
| 479 | int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits - |
| 480 | sb->s_blocksize_bits; |
| 481 | |
| 482 | return (u64)clusters << c_to_b_bits; |
| 483 | } |
| 484 | |
| 485 | static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb, |
| 486 | u64 blocks) |
| 487 | { |
| 488 | int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits - |
| 489 | sb->s_blocksize_bits; |
| 490 | |
| 491 | return (u32)(blocks >> b_to_c_bits); |
| 492 | } |
| 493 | |
| 494 | static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb, |
| 495 | u64 bytes) |
| 496 | { |
| 497 | int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; |
| 498 | unsigned int clusters; |
| 499 | |
| 500 | bytes += OCFS2_SB(sb)->s_clustersize - 1; |
| 501 | /* OCFS2 just cannot have enough clusters to overflow this */ |
| 502 | clusters = (unsigned int)(bytes >> cl_bits); |
| 503 | |
| 504 | return clusters; |
| 505 | } |
| 506 | |
| 507 | static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb, |
| 508 | u64 bytes) |
| 509 | { |
| 510 | bytes += sb->s_blocksize - 1; |
| 511 | return bytes >> sb->s_blocksize_bits; |
| 512 | } |
| 513 | |
| 514 | static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb, |
| 515 | u32 clusters) |
| 516 | { |
| 517 | return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits; |
| 518 | } |
| 519 | |
| 520 | static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb, |
| 521 | u64 bytes) |
| 522 | { |
| 523 | int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; |
| 524 | unsigned int clusters; |
| 525 | |
| 526 | clusters = ocfs2_clusters_for_bytes(sb, bytes); |
| 527 | return (u64)clusters << cl_bits; |
| 528 | } |
| 529 | |
| 530 | static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb, |
| 531 | u64 bytes) |
| 532 | { |
| 533 | u64 blocks; |
| 534 | |
| 535 | blocks = ocfs2_blocks_for_bytes(sb, bytes); |
| 536 | return blocks << sb->s_blocksize_bits; |
| 537 | } |
| 538 | |
| 539 | static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes) |
| 540 | { |
| 541 | return (unsigned long)((bytes + 511) >> 9); |
| 542 | } |
| 543 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 544 | static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb, |
| 545 | unsigned long pg_index) |
| 546 | { |
| 547 | u32 clusters = pg_index; |
| 548 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; |
| 549 | |
| 550 | if (unlikely(PAGE_CACHE_SHIFT > cbits)) |
| 551 | clusters = pg_index << (PAGE_CACHE_SHIFT - cbits); |
| 552 | else if (PAGE_CACHE_SHIFT < cbits) |
| 553 | clusters = pg_index >> (cbits - PAGE_CACHE_SHIFT); |
| 554 | |
| 555 | return clusters; |
| 556 | } |
| 557 | |
| 558 | /* |
| 559 | * Find the 1st page index which covers the given clusters. |
| 560 | */ |
Mark Fasheh | 7c08d70 | 2007-07-20 11:58:36 -0700 | [diff] [blame] | 561 | static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb, |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 562 | u32 clusters) |
| 563 | { |
| 564 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; |
Mark Fasheh | 7c08d70 | 2007-07-20 11:58:36 -0700 | [diff] [blame] | 565 | pgoff_t index = clusters; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 566 | |
| 567 | if (PAGE_CACHE_SHIFT > cbits) { |
Mark Fasheh | 7c08d70 | 2007-07-20 11:58:36 -0700 | [diff] [blame] | 568 | index = (pgoff_t)clusters >> (PAGE_CACHE_SHIFT - cbits); |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 569 | } else if (PAGE_CACHE_SHIFT < cbits) { |
Mark Fasheh | 7c08d70 | 2007-07-20 11:58:36 -0700 | [diff] [blame] | 570 | index = (pgoff_t)clusters << (cbits - PAGE_CACHE_SHIFT); |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 571 | } |
| 572 | |
| 573 | return index; |
| 574 | } |
| 575 | |
Mark Fasheh | 60b1139 | 2007-02-16 11:46:50 -0800 | [diff] [blame] | 576 | static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb) |
| 577 | { |
| 578 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; |
| 579 | unsigned int pages_per_cluster = 1; |
| 580 | |
| 581 | if (PAGE_CACHE_SHIFT < cbits) |
| 582 | pages_per_cluster = 1 << (cbits - PAGE_CACHE_SHIFT); |
| 583 | |
| 584 | return pages_per_cluster; |
| 585 | } |
| 586 | |
Mark Fasheh | ebcee4b | 2008-07-28 14:55:20 -0700 | [diff] [blame] | 587 | static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb, |
| 588 | unsigned int megs) |
| 589 | { |
| 590 | BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE > 1048576); |
| 591 | |
| 592 | return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits); |
| 593 | } |
| 594 | |
Tao Ma | 4d0ddb2 | 2008-03-05 16:11:46 +0800 | [diff] [blame] | 595 | static inline void ocfs2_init_inode_steal_slot(struct ocfs2_super *osb) |
| 596 | { |
| 597 | spin_lock(&osb->osb_lock); |
| 598 | osb->s_inode_steal_slot = OCFS2_INVALID_SLOT; |
| 599 | spin_unlock(&osb->osb_lock); |
| 600 | atomic_set(&osb->s_num_inodes_stolen, 0); |
| 601 | } |
| 602 | |
| 603 | static inline void ocfs2_set_inode_steal_slot(struct ocfs2_super *osb, |
| 604 | s16 slot) |
| 605 | { |
| 606 | spin_lock(&osb->osb_lock); |
| 607 | osb->s_inode_steal_slot = slot; |
| 608 | spin_unlock(&osb->osb_lock); |
| 609 | } |
| 610 | |
| 611 | static inline s16 ocfs2_get_inode_steal_slot(struct ocfs2_super *osb) |
| 612 | { |
| 613 | s16 slot; |
| 614 | |
| 615 | spin_lock(&osb->osb_lock); |
| 616 | slot = osb->s_inode_steal_slot; |
| 617 | spin_unlock(&osb->osb_lock); |
| 618 | |
| 619 | return slot; |
| 620 | } |
| 621 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 622 | #define ocfs2_set_bit ext2_set_bit |
| 623 | #define ocfs2_clear_bit ext2_clear_bit |
| 624 | #define ocfs2_test_bit ext2_test_bit |
| 625 | #define ocfs2_find_next_zero_bit ext2_find_next_zero_bit |
| 626 | #endif /* OCFS2_H */ |
| 627 | |