1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2003 Cluster File Systems, Inc.
6 * This code is issued under the GNU General Public License.
7 * See the file COPYING in this distribution
10 #ifndef LLITE_INTERNAL_H
11 #define LLITE_INTERNAL_H
13 #include <linux/lustre_debug.h>
15 /* default to about 40meg of readahead on a given system. That much tied
16 * up in 512k readahead requests serviced at 40ms each is about 1GB/s. */
17 #define SBI_DEFAULT_RA_MAX ((40 << 20) >> PAGE_CACHE_SHIFT)
22 RA_STAT_DISTANT_READPAGE,
23 RA_STAT_MISS_IN_WINDOW,
29 RA_STAT_MAX_IN_FLIGHT,
34 unsigned long ra_cur_pages;
35 unsigned long ra_max_pages;
36 unsigned long ra_stats[_NR_RA_STAT];
39 /* after roughly how long should we remove an inactive mount? */
40 #define GNS_MOUNT_TIMEOUT 120
42 /* how often should the GNS timer look for mounts to cleanup? */
43 #define GNS_TICK_TIMEOUT 1
45 /* how many times GNS will try to wait for 1 second for mount */
46 #define GNS_WAIT_ATTEMPTS 10
49 /* this protects pglist and max_r_a_pages. It isn't safe to grab from
50 * interrupt contexts. */
53 struct obd_uuid ll_sb_uuid;
54 struct obd_export *ll_md_exp;
55 struct obd_export *ll_dt_exp;
56 struct lov_desc ll_dt_desc;
57 struct proc_dir_entry *ll_proc_root;
58 struct lustre_id ll_rootid; /* root lustre id */
60 struct lustre_mount_data *ll_lmd;
64 struct list_head ll_conn_chain; /* per-conn chain of SBs */
66 struct hlist_head ll_orphan_dentry_list; /*please don't ask -p*/
67 struct ll_close_queue *ll_lcq;
69 struct lprocfs_stats *ll_stats; /* lprocfs stats counter */
71 unsigned long ll_pglist_gen;
72 struct list_head ll_pglist;
74 struct ll_ra_info ll_ra_info;
76 unsigned int ll_remote; /* remote client? */
78 /* times spent waiting for locks in each call site. These are
79 * all protected by the ll_lock */
80 struct obd_service_time ll_read_stime;
81 struct obd_service_time ll_write_stime;
82 struct obd_service_time ll_grouplock_stime;
83 struct obd_service_time ll_seek_stime;
84 struct obd_service_time ll_setattr_stime;
85 struct obd_service_time ll_brw_stime;
86 // struct obd_service_time ll_done_stime;
88 int ll_config_version; /* last-applied update */
90 /* list of GNS mounts; protected by the dcache_lock */
91 struct list_head ll_mnt_list;
93 struct semaphore ll_gns_sem;
94 spinlock_t ll_gns_lock;
95 wait_queue_head_t ll_gns_waitq;
96 atomic_t ll_gns_enabled;
98 struct timer_list ll_gns_timer;
99 struct list_head ll_gns_sbi_head;
100 struct completion ll_gns_mount_finished;
102 unsigned long ll_gns_tick;
103 unsigned long ll_gns_timeout;
106 char ll_gns_upcall[PATH_MAX];
108 /* mount object entry name */
109 char ll_gns_oname[PATH_MAX];
113 struct completion gc_starting;
114 struct completion gc_finishing;
117 /* mounting states */
118 #define LL_GNS_IDLE (1 << 0)
119 #define LL_GNS_MOUNTING (1 << 1)
120 #define LL_GNS_FINISHED (1 << 2)
122 /* mounts checking flags */
123 #define LL_GNS_UMOUNT (1 << 0)
124 #define LL_GNS_CHECK (1 << 1)
126 struct ll_readahead_state {
128 unsigned long ras_last_readpage, ras_consecutive;
129 unsigned long ras_window_start, ras_window_len;
130 unsigned long ras_next_readahead;
134 extern kmem_cache_t *ll_file_data_slab;
135 extern kmem_cache_t *ll_intent_slab;
136 struct lustre_handle;
138 struct ll_file_data {
139 struct ll_readahead_state fd_ras;
142 struct lustre_handle fd_cwlockh;
143 unsigned long fd_gid;
146 struct lov_stripe_md;
148 extern spinlock_t inode_lock;
150 extern void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi);
151 extern struct proc_dir_entry *proc_lustre_fs_root;
153 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
154 # define hlist_del_init list_del_init
157 static inline struct inode *ll_info2i(struct ll_inode_info *lli)
159 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
160 return &lli->lli_vfs_inode;
162 return list_entry(lli, struct inode, u.generic_ip);
168 struct inode *icbd_parent;
169 struct dentry **icbd_childp;
173 #define LLAP_MAGIC 98764321
175 struct ll_async_page {
178 struct page *llap_page;
179 struct list_head llap_pending_write;
180 /* only trust these if the page lock is providing exclusion */
181 unsigned llap_write_queued:1,
182 llap_defer_uptodate:1,
186 struct list_head llap_proc_item;
190 LLAP_ORIGIN_UNKNOWN = 0,
191 LLAP_ORIGIN_READPAGE,
192 LLAP_ORIGIN_READAHEAD,
193 LLAP_ORIGIN_COMMIT_WRITE,
194 LLAP_ORIGIN_WRITEPAGE,
198 /* llite/lproc_llite.c */
199 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
200 struct super_block *sb, char *lov,
202 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi);
205 extern struct file_operations ll_dir_operations;
206 extern struct inode_operations ll_dir_inode_operations;
209 int ll_objects_destroy(struct ptlrpc_request *request,
210 struct inode *dir, int offset);
211 struct inode *ll_iget(struct super_block *sb, ino_t hash,
212 struct lustre_md *lic);
213 struct dentry *ll_find_alias(struct inode *, struct dentry *);
214 int ll_mdc_cancel_unused(struct lustre_handle *, struct inode *, int flags,
216 int ll_mdc_blocking_ast(struct ldlm_lock *, struct ldlm_lock_desc *,
217 void *data, int flag);
219 int ll_prepare_write(struct file *, struct page *, unsigned from, unsigned to);
220 int ll_commit_write(struct file *, struct page *, unsigned from, unsigned to);
221 int ll_writepage(struct page *page);
222 void ll_inode_fill_obdo(struct inode *inode, int cmd, struct obdo *oa);
223 void ll_ap_completion(void *data, int cmd, struct obdo *oa, int rc);
224 void ll_removepage(struct page *page);
225 int ll_readpage(struct file *file, struct page *page);
226 struct ll_async_page *llap_from_cookie(void *cookie);
227 struct ll_async_page *llap_from_page(struct page *page, unsigned origin);
228 struct ll_async_page *llap_cast_private(struct page *page);
229 void ll_readahead_init(struct inode *inode, struct ll_readahead_state *ras);
231 void ll_ra_accounting(struct page *page, struct address_space *mapping);
232 void ll_truncate(struct inode *inode);
235 extern struct file_operations ll_file_operations;
236 extern struct inode_operations ll_file_inode_operations;
237 int ll_md_real_close(struct obd_export *md_exp,
238 struct inode *inode, int flags);
239 extern int ll_inode_revalidate_it(struct dentry *);
240 extern int ll_setxattr(struct dentry *, const char *, const void *,
242 extern int ll_getxattr(struct dentry *, const char *, void *, size_t);
243 extern int ll_listxattr(struct dentry *, char *, size_t);
244 extern int ll_removexattr(struct dentry *, const char *);
245 extern int ll_inode_permission(struct inode *, int, struct nameidata *);
246 int ll_refresh_lsm(struct inode *inode, struct lov_stripe_md *lsm);
247 int ll_extent_lock(struct ll_file_data *, struct inode *,
248 struct lov_stripe_md *, int mode, ldlm_policy_data_t *,
249 struct lustre_handle *, int ast_flags,
250 struct obd_service_time *);
251 int ll_extent_unlock(struct ll_file_data *, struct inode *,
252 struct lov_stripe_md *, int mode, struct lustre_handle *);
253 int ll_file_open(struct inode *inode, struct file *file);
254 int ll_file_release(struct inode *inode, struct file *file);
255 int ll_lsm_getattr(struct obd_export *, struct lov_stripe_md *, struct obdo *);
256 int ll_glimpse_size(struct inode *inode);
257 int ll_local_open(struct file *file, struct lookup_intent *it,
258 struct obd_client_handle *och);
259 int ll_md_close(struct obd_export *md_exp, struct inode *inode,
261 int ll_md_och_close(struct obd_export *md_exp, struct inode *inode,
262 struct obd_client_handle *och);
263 void ll_och_fill(struct inode *inode, struct lookup_intent *it,
264 struct obd_client_handle *och);
266 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
267 int ll_getattr(struct vfsmount *mnt, struct dentry *de, struct kstat *stat);
269 void ll_stime_record(struct ll_sb_info *sbi, struct timeval *start,
270 struct obd_service_time *stime);
273 void ll_intent_drop_lock(struct lookup_intent *);
274 void ll_intent_release(struct lookup_intent *);
275 int ll_intent_alloc(struct lookup_intent *);
276 void ll_intent_free(struct lookup_intent *it);
277 extern void ll_set_dd(struct dentry *de);
278 void ll_unhash_aliases(struct inode *);
279 void ll_frob_intent(struct lookup_intent **itp, struct lookup_intent *deft);
280 void ll_lookup_finish_locks(struct lookup_intent *it, struct dentry *dentry);
281 int revalidate_it_finish(struct ptlrpc_request *request, int offset,
282 struct lookup_intent *it, struct dentry *de);
285 /* llite/llite_gns.c */
286 int ll_gns_start_thread(void);
287 void ll_gns_stop_thread(void);
289 int ll_gns_mount_object(struct dentry *dentry,
290 struct vfsmount *mnt);
291 int ll_gns_umount_object(struct vfsmount *mnt);
293 int ll_gns_check_mounts(struct ll_sb_info *sbi,
296 void ll_gns_timer_callback(unsigned long data);
297 void ll_gns_add_timer(struct ll_sb_info *sbi);
298 void ll_gns_del_timer(struct ll_sb_info *sbi);
300 /* llite/llite_lib.c */
301 extern struct super_operations lustre_super_operations;
303 char *ll_read_opt(const char *opt, char *data);
304 int ll_set_opt(const char *opt, char *data, int fl);
305 void ll_options(char *options, char **ost, char **mds, char **sec,
306 int *async, int *flags);
307 void ll_lli_init(struct ll_inode_info *lli);
308 int ll_fill_super(struct super_block *sb, void *data, int silent);
309 int lustre_fill_super(struct super_block *sb, void *data, int silent);
310 void lustre_put_super(struct super_block *sb);
311 struct inode *ll_inode_from_lock(struct ldlm_lock *lock);
312 void ll_clear_inode(struct inode *inode);
313 int ll_attr2inode(struct inode *inode, struct iattr *attr, int trunc);
314 int ll_setattr_raw(struct inode *inode, struct iattr *attr);
315 int ll_setattr(struct dentry *de, struct iattr *attr);
316 int ll_statfs(struct super_block *sb, struct kstatfs *sfs);
317 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
318 unsigned long maxage);
319 void ll_update_inode(struct inode *inode, struct lustre_md *);
320 int it_disposition(struct lookup_intent *it, int flag);
321 void it_set_disposition(struct lookup_intent *it, int flag);
322 void ll_read_inode2(struct inode *inode, void *opaque);
323 void ll_delete_inode(struct inode *inode);
324 int ll_iocontrol(struct inode *inode, struct file *file,
325 unsigned int cmd, unsigned long arg);
326 void ll_umount_begin(struct super_block *sb);
327 int ll_prep_inode(struct obd_export *, struct obd_export *, struct inode **inode,
328 struct ptlrpc_request *req, int offset, struct super_block *);
329 __u32 get_uuid2int(const char *name, int len);
330 struct dentry *ll_fh_to_dentry(struct super_block *sb, __u32 *data, int len,
331 int fhtype, int parent);
332 int ll_dentry_to_fh(struct dentry *, __u32 *datap, int *lenp, int need_parent);
333 int null_if_equal(struct ldlm_lock *lock, void *data);
334 int ll_process_config_update(struct ll_sb_info *sbi, int clean);
336 /* llite/special.c */
337 extern struct inode_operations ll_special_inode_operations;
338 extern struct file_operations ll_special_chr_inode_fops;
339 extern struct file_operations ll_special_chr_file_fops;
340 extern struct file_operations ll_special_blk_inode_fops;
341 extern struct file_operations ll_special_fifo_inode_fops;
342 extern struct file_operations ll_special_fifo_file_fops;
343 extern struct file_operations ll_special_sock_inode_fops;
345 /* llite/symlink.c */
346 extern struct inode_operations ll_fast_symlink_inode_operations;
348 /* llite/llite_close.c */
349 struct ll_close_queue {
351 struct list_head lcq_list;
352 wait_queue_head_t lcq_waitq;
353 struct completion lcq_comp;
356 void llap_write_pending(struct inode *inode, struct ll_async_page *llap);
357 void llap_write_complete(struct inode *inode, struct ll_async_page *llap);
358 void ll_open_complete(struct inode *inode);
359 int ll_is_inode_dirty(struct inode *inode);
360 void ll_try_done_writing(struct inode *inode);
361 void ll_queue_done_writing(struct inode *inode);
362 void ll_close_thread_shutdown(struct ll_close_queue *lcq);
363 int ll_close_thread_start(struct ll_close_queue **lcq_ret);
366 /* llite/llite_mmap.c */
367 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
368 typedef struct rb_root rb_root_t;
369 typedef struct rb_node rb_node_t;
372 struct ll_lock_tree_node;
373 struct ll_lock_tree {
375 struct list_head lt_locked_list;
376 struct ll_file_data *lt_fd;
378 int ll_teardown_mmaps(struct address_space *mapping, __u64 first,
380 int ll_file_mmap(struct file * file, struct vm_area_struct * vma);
381 struct ll_lock_tree_node * ll_node_from_inode(struct inode *inode, __u64 start,
382 __u64 end, ldlm_mode_t mode);
383 int ll_tree_lock(struct ll_lock_tree *tree,
384 struct ll_lock_tree_node *first_node, struct inode *inode,
385 const char *buf, size_t count, int ast_flags);
386 int ll_tree_unlock(struct ll_lock_tree *tree, struct inode *inode);
388 int ll_get_fid(struct obd_export *exp, struct lustre_id *idp,
389 char *filename, struct lustre_id *ret);
392 #define LL_SBI_NOLCK 0x1
393 #define LL_SBI_READAHEAD 0x2
394 #define LL_SUPER_MAGIC 0x0BD00BD0
395 #define LL_MAX_BLKSIZE (4UL * 1024 * 1024)
397 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
398 #define ll_s2sbi(sb) ((struct ll_sb_info *)((sb)->s_fs_info))
399 #define ll_set_sbi(sb, sbi) ((sb)->s_fs_info = sbi)
400 static inline __u64 ll_ts2u64(struct timespec *time)
402 __u64 t = time->tv_sec;
406 #define ll_s2sbi(sb) ((struct ll_sb_info *)((sb)->u.generic_sbp))
407 #define ll_set_sbi(sb, sbi) ((sb)->u.generic_sbp = sbi)
408 static inline __u64 ll_ts2u64(time_t *time)
414 /* don't need an addref as the sb_info should be holding one */
415 static inline struct obd_export *ll_s2dtexp(struct super_block *sb)
417 return ll_s2sbi(sb)->ll_dt_exp;
420 /* don't need an addref as the sb_info should be holding one */
421 static inline struct obd_export *ll_s2mdexp(struct super_block *sb)
423 return ll_s2sbi(sb)->ll_md_exp;
426 static inline struct client_obd *sbi2md(struct ll_sb_info *sbi)
428 struct obd_device *obd = sbi->ll_md_exp->exp_obd;
434 // FIXME: replace the name of this with LL_SB to conform to kernel stuff
435 static inline struct ll_sb_info *ll_i2sbi(struct inode *inode)
437 return ll_s2sbi(inode->i_sb);
440 static inline struct obd_export *ll_i2dtexp(struct inode *inode)
442 return ll_s2dtexp(inode->i_sb);
445 static inline struct obd_export *ll_i2mdexp(struct inode *inode)
447 return ll_s2mdexp(inode->i_sb);
450 static inline int ll_mds_max_easize(struct super_block *sb)
452 return sbi2md(ll_s2sbi(sb))->cl_max_mds_easize;
455 static inline __u64 ll_file_maxbytes(struct inode *inode)
457 return ll_i2info(inode)->lli_maxbytes;
461 ll_inode2id(struct lustre_id *id, struct inode *inode)
463 struct lustre_id *lid = &ll_i2info(inode)->lli_id;
465 mdc_pack_id(id, inode->i_ino, inode->i_generation,
466 (inode->i_mode & S_IFMT), id_group(lid),
471 ll_prepare_mdc_data(struct mdc_op_data *data, struct inode *i1,
472 struct inode *i2, const char *name, int namelen,
476 ll_inode2id(&data->id1, i1);
478 /* it could be directory with mea */
479 data->mea1 = ll_i2info(i1)->lli_mea;
482 ll_inode2id(&data->id2, i2);
483 data->mea2 = ll_i2info(i2)->lli_mea;
488 data->namelen = namelen;
489 data->create_mode = mode;
490 data->mod_time = LTIME_S(CURRENT_TIME);
495 * this was needed for catching correct calling place of ll_intent_alloc() with
496 * missed ll_intent_free() causing memory leak. --umka
498 #define ll_intent_alloc(it) \
501 OBD_SLAB_ALLOC((it)->d.fs_data, ll_intent_slab, SLAB_KERNEL, \
502 sizeof(struct lustre_intent_data)); \
503 if (!(it)->d.fs_data) { \
508 (it)->it_op_release = ll_intent_release; \
512 #define ll_intent_free(it) \
514 if ((it)->d.fs_data) { \
515 OBD_SLAB_FREE((it)->d.fs_data, ll_intent_slab, \
516 sizeof(struct lustre_intent_data)); \
517 (it)->d.fs_data = NULL; \
522 #endif /* LLITE_INTERNAL_H */