1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
5 #ifndef LLITE_INTERNAL_H
6 #define LLITE_INTERNAL_H
8 # include <linux/lustre_acl.h>
10 #ifdef CONFIG_FS_POSIX_ACL
11 # include <linux/fs.h>
13 # include <linux/xattr_acl.h>
15 #ifdef HAVE_LINUX_POSIX_ACL_XATTR_H
16 # include <linux/posix_acl_xattr.h>
20 #include <lustre_debug.h>
21 #include <lustre_ver.h>
22 #include <lustre_disk.h> /* for s2sbi */
28 #define LL_IT2STR(it) ((it) ? ldlm_it2str((it)->it_op) : "0")
29 #define LUSTRE_FPRIVATE(file) ((file)->private_data)
31 #ifdef HAVE_VFS_INTENT_PATCHES
32 static inline struct lookup_intent *ll_nd2it(struct nameidata *nd)
38 struct ll_dentry_data {
41 struct obd_client_handle lld_cwd_och;
42 struct obd_client_handle lld_mnt_och;
43 #ifndef HAVE_VFS_INTENT_PATCHES
44 struct lookup_intent *lld_it;
48 #define ll_d2d(de) ((struct ll_dentry_data*) de->d_fsdata)
50 extern struct file_operations ll_pgcache_seq_fops;
52 #define LLI_INODE_MAGIC 0x111d0de5
53 #define LLI_INODE_DEAD 0xdeadd00d
55 /* remote client permission cache */
56 #define REMOTE_PERM_HASHSIZE 16
58 /* llite setxid/access permission for user on remote client */
59 struct ll_remote_perm {
60 struct hlist_node lrp_list;
65 int lrp_access_perm; /* MAY_READ/WRITE/EXEC, this
66 is access permission with
67 lrp_fsuid/lrp_fsgid. */
71 /* MDS has an authority for the Size-on-MDS attributes. */
72 LLIF_MDS_SIZE_LOCK = (1 << 0),
73 /* Epoch close is postponed. */
74 LLIF_EPOCH_PENDING = (1 << 1),
75 /* DONE WRITING is allowed. */
76 LLIF_DONE_WRITING = (1 << 2),
77 /* Sizeon-on-MDS attributes are changed. An attribute update needs to
79 LLIF_SOM_DIRTY = (1 << 3),
82 struct ll_inode_info {
84 struct semaphore lli_size_sem; /* protect open and change size */
85 void *lli_size_sem_owner;
86 struct semaphore lli_write_sem;
87 char *lli_symlink_name;
90 unsigned long lli_flags;
92 /* this lock protects posix_acl, pending_write_llaps, mmap_cnt */
94 struct list_head lli_pending_write_llaps;
95 struct list_head lli_close_list;
96 /* handle is to be sent to MDS later on done_writing and setattr.
97 * Open handle data are needed for the recovery to reconstruct
98 * the inode state on the MDS. XXX: recovery is not ready yet. */
99 struct obd_client_handle *lli_pending_och;
100 atomic_t lli_mmap_cnt;
102 /* for writepage() only to communicate to fsync */
105 struct posix_acl *lli_posix_acl;
107 /* remote permission hash */
108 struct hlist_head *lli_remote_perms;
109 unsigned long lli_rmtperm_utime;
110 struct semaphore lli_rmtperm_sem;
112 struct list_head lli_dead_list;
114 struct semaphore lli_och_sem; /* Protects access to och pointers
115 and their usage counters */
116 /* We need all three because every inode may be opened in different
118 struct obd_client_handle *lli_mds_read_och;
119 __u64 lli_open_fd_read_count;
120 struct obd_client_handle *lli_mds_write_och;
121 __u64 lli_open_fd_write_count;
122 struct obd_client_handle *lli_mds_exec_och;
123 __u64 lli_open_fd_exec_count;
125 struct inode lli_vfs_inode;
127 /* identifying fields for both metadata and data stacks. */
128 struct lu_fid lli_fid;
129 struct lov_stripe_md *lli_smd;
132 /* open count currently used by capability only, indicate whether
133 * capability needs renewal */
134 atomic_t lli_open_count;
135 struct obd_capa *lli_mds_capa;
136 struct list_head lli_oss_capas;
140 * Locking to guarantee consistency of non-atomic updates to long long i_size,
141 * consistency between file size and KMS, and consistency within
142 * ->lli_smd->lsm_oinfo[]'s.
144 * Implemented by ->lli_size_sem and ->lsm_sem, nested in that order.
147 void ll_inode_size_lock(struct inode *inode, int lock_lsm);
148 void ll_inode_size_unlock(struct inode *inode, int unlock_lsm);
150 // FIXME: replace the name of this with LL_I to conform to kernel stuff
151 // static inline struct ll_inode_info *LL_I(struct inode *inode)
152 static inline struct ll_inode_info *ll_i2info(struct inode *inode)
154 return container_of(inode, struct ll_inode_info, lli_vfs_inode);
157 /* default to about 40meg of readahead on a given system. That much tied
158 * up in 512k readahead requests serviced at 40ms each is about 1GB/s. */
159 #define SBI_DEFAULT_READAHEAD_MAX (40UL << (20 - CFS_PAGE_SHIFT))
161 /* default to read-ahead full files smaller than 2MB on the second read */
162 #define SBI_DEFAULT_READAHEAD_WHOLE_MAX (2UL << (20 - CFS_PAGE_SHIFT))
167 RA_STAT_DISTANT_READPAGE,
168 RA_STAT_MISS_IN_WINDOW,
169 RA_STAT_FAILED_GRAB_PAGE,
170 RA_STAT_FAILED_MATCH,
175 RA_STAT_MAX_IN_FLIGHT,
176 RA_STAT_WRONG_GRAB_PAGE,
181 unsigned long ra_cur_pages;
182 unsigned long ra_max_pages;
183 unsigned long ra_max_read_ahead_whole_pages;
184 unsigned long ra_stats[_NR_RA_STAT];
187 /* LL_HIST_MAX=32 causes an overflow */
188 #define LL_HIST_MAX 28
189 #define LL_HIST_START 12 /* buckets start at 2^12 = 4k */
190 #define LL_PROCESS_HIST_MAX 10
191 struct per_process_info {
193 struct obd_histogram pp_r_hist;
194 struct obd_histogram pp_w_hist;
197 /* pp_extents[LL_PROCESS_HIST_MAX] will hold the combined process info */
198 struct ll_rw_extents_info {
199 struct per_process_info pp_extents[LL_PROCESS_HIST_MAX + 1];
202 #define LL_OFFSET_HIST_MAX 100
203 struct ll_rw_process_info {
206 loff_t rw_range_start;
208 loff_t rw_last_file_pos;
210 size_t rw_smallest_extent;
211 size_t rw_largest_extent;
212 struct file *rw_last_file;
215 enum stats_track_type {
216 STATS_TRACK_ALL = 0, /* track all processes */
217 STATS_TRACK_PID, /* track process with this pid */
218 STATS_TRACK_PPID, /* track processes with this ppid */
219 STATS_TRACK_GID, /* track processes with this gid */
223 /* flags for sbi->ll_flags */
224 #define LL_SBI_NOLCK 0x01 /* DLM locking disabled (directio-only) */
225 #define LL_SBI_CHECKSUM 0x02 /* checksum each page as it's written */
226 #define LL_SBI_FLOCK 0x04
227 #define LL_SBI_USER_XATTR 0x08 /* support user xattr */
228 #define LL_SBI_ACL 0x10 /* support ACL */
229 #define LL_SBI_JOIN 0x20 /* support JOIN */
230 #define LL_SBI_RMT_CLIENT 0x40 /* remote client */
231 #define LL_SBI_MDS_CAPA 0x80 /* support mds capa */
232 #define LL_SBI_OSS_CAPA 0x100 /* support oss capa */
233 #define LL_SBI_LOCALFLOCK 0x200 /* Local flocks support by kernel */
234 #define LL_SBI_LRU_RESIZE 0x400 /* lru resize support */
237 struct list_head ll_list;
238 /* this protects pglist and ra_info. It isn't safe to
239 * grab from interrupt contexts */
241 spinlock_t ll_pp_extent_lock; /* Lock for pp_extent entries */
242 spinlock_t ll_process_lock; /* Lock for ll_rw_process_info */
243 struct obd_uuid ll_sb_uuid;
244 struct obd_export *ll_md_exp;
245 struct obd_export *ll_dt_exp;
246 struct proc_dir_entry* ll_proc_root;
247 struct lu_fid ll_root_fid; /* root object fid */
250 struct list_head ll_conn_chain; /* per-conn chain of SBs */
251 struct lustre_client_ocd ll_lco;
253 struct list_head ll_orphan_dentry_list; /*please don't ask -p*/
254 struct ll_close_queue *ll_lcq;
256 struct lprocfs_stats *ll_stats; /* lprocfs stats counter */
258 unsigned long ll_async_page_max;
259 unsigned long ll_async_page_count;
260 unsigned long ll_pglist_gen;
261 struct list_head ll_pglist; /* all pages (llap_pglist_item) */
263 struct ll_ra_info ll_ra_info;
264 unsigned int ll_namelen;
265 struct file_operations *ll_fop;
267 #ifdef HAVE_EXPORT___IGET
268 struct list_head ll_deathrow; /* inodes to be destroyed (b1443) */
269 spinlock_t ll_deathrow_lock;
271 /* =0 - hold lock over whole read/write
272 * >0 - max. chunk to be read/written w/o lock re-acquiring */
273 unsigned long ll_max_rw_chunk;
276 struct ll_rw_extents_info ll_rw_extents_info;
277 int ll_extent_process_count;
278 struct ll_rw_process_info ll_rw_process_info[LL_PROCESS_HIST_MAX];
279 unsigned int ll_offset_process_count;
280 struct ll_rw_process_info ll_rw_offset_info[LL_OFFSET_HIST_MAX];
281 unsigned int ll_rw_offset_entry_count;
282 enum stats_track_type ll_stats_track_type;
283 int ll_stats_track_id;
286 dev_t ll_sdev_orig; /* save s_dev before assign for
290 #define LL_DEFAULT_MAX_RW_CHUNK (32 * 1024 * 1024)
295 struct task_struct *lrr_reader;
296 struct list_head lrr_linkage;
300 * per file-descriptor read-ahead data.
302 struct ll_readahead_state {
305 * index of the last page that read(2) needed and that wasn't in the
306 * cache. Used by ras_update() to detect seeks.
308 * XXX nikita: if access seeks into cached region, Lustre doesn't see
311 unsigned long ras_last_readpage;
313 * number of pages read after last read-ahead window reset. As window
314 * is reset on each seek, this is effectively a number of consecutive
315 * accesses. Maybe ->ras_accessed_in_window is better name.
317 * XXX nikita: window is also reset (by ras_update()) when Lustre
318 * believes that memory pressure evicts read-ahead pages. In that
319 * case, it probably doesn't make sense to expand window to
320 * PTLRPC_MAX_BRW_PAGES on the third access.
322 unsigned long ras_consecutive_pages;
324 * number of read requests after the last read-ahead window reset
325 * As window is reset on each seek, this is effectively the number
326 * on consecutive read request and is used to trigger read-ahead.
328 unsigned long ras_consecutive_requests;
330 * Parameters of current read-ahead window. Handled by
331 * ras_update(). On the initial access to the file or after a seek,
332 * window is reset to 0. After 3 consecutive accesses, window is
333 * expanded to PTLRPC_MAX_BRW_PAGES. Afterwards, window is enlarged by
334 * PTLRPC_MAX_BRW_PAGES chunks up to ->ra_max_pages.
336 unsigned long ras_window_start, ras_window_len;
338 * Where next read-ahead should start at. This lies within read-ahead
339 * window. Read-ahead window is read in pieces rather than at once
340 * because: 1. lustre limits total number of pages under read-ahead by
341 * ->ra_max_pages (see ll_ra_count_get()), 2. client cannot read pages
342 * not covered by DLM lock.
344 unsigned long ras_next_readahead;
346 * Total number of ll_file_read requests issued, reads originating
347 * due to mmap are not counted in this total. This value is used to
348 * trigger full file read-ahead after multiple reads to a small file.
350 unsigned long ras_requests;
352 * Page index with respect to the current request, these value
353 * will not be accurate when dealing with reads issued via mmap.
355 unsigned long ras_request_index;
357 * list of struct ll_ra_read's one per read(2) call current in
358 * progress against this file descriptor. Used by read-ahead code,
359 * protected by ->ras_lock.
361 struct list_head ras_read_beads;
367 extern cfs_mem_cache_t *ll_file_data_slab;
368 struct lustre_handle;
369 struct ll_file_data {
370 struct ll_readahead_state fd_ras;
372 struct lustre_handle fd_cwlockh;
373 unsigned long fd_gid;
374 struct ll_file_dir fd_dir;
378 struct lov_stripe_md;
380 extern spinlock_t inode_lock;
382 extern struct proc_dir_entry *proc_lustre_fs_root;
384 static inline struct inode *ll_info2i(struct ll_inode_info *lli)
386 return &lli->lli_vfs_inode;
390 struct inode *icbd_parent;
391 struct dentry **icbd_childp;
395 void ll_i2gids(__u32 *suppgids, struct inode *i1,struct inode *i2);
397 #define LLAP_MAGIC 98764321
399 extern cfs_mem_cache_t *ll_async_page_slab;
400 extern size_t ll_async_page_slab_size;
401 struct ll_async_page {
403 /* only trust these if the page lock is providing exclusion */
404 unsigned int llap_write_queued:1,
405 llap_defer_uptodate:1,
410 struct page *llap_page;
411 struct list_head llap_pending_write;
412 struct list_head llap_pglist_item;
413 /* checksum for paranoid I/O debugging */
418 * enumeration of llap_from_page() call-sites. Used to export statistics in
419 * /proc/fs/lustre/llite/fsN/dump_page_cache.
422 LLAP_ORIGIN_UNKNOWN = 0,
423 LLAP_ORIGIN_READPAGE,
424 LLAP_ORIGIN_READAHEAD,
425 LLAP_ORIGIN_COMMIT_WRITE,
426 LLAP_ORIGIN_WRITEPAGE,
427 LLAP_ORIGIN_REMOVEPAGE,
430 extern char *llap_origins[];
432 #ifdef HAVE_REGISTER_CACHE
433 #define ll_register_cache(cache) register_cache(cache)
434 #define ll_unregister_cache(cache) unregister_cache(cache)
436 #define ll_register_cache(cache) do {} while (0)
437 #define ll_unregister_cache(cache) do {} while (0)
440 void ll_ra_read_in(struct file *f, struct ll_ra_read *rar);
441 void ll_ra_read_ex(struct file *f, struct ll_ra_read *rar);
442 struct ll_ra_read *ll_ra_read_get(struct file *f);
444 /* llite/lproc_llite.c */
446 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
447 struct super_block *sb, char *osc, char *mdc);
448 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi);
449 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count);
450 void lprocfs_llite_init_vars(struct lprocfs_static_vars *lvars);
452 static inline int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
453 struct super_block *sb, char *osc, char *mdc){return 0;}
454 static inline void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi) {}
455 static void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count) {}
456 static void lprocfs_llite_init_vars(struct lprocfs_static_vars *lvars)
458 memset(lvars, 0, sizeof(*lvars));
464 extern struct file_operations ll_dir_operations;
465 extern struct inode_operations ll_dir_inode_operations;
468 int ll_objects_destroy(struct ptlrpc_request *request, struct inode *dir);
469 struct inode *ll_iget(struct super_block *sb, ino_t hash,
470 struct lustre_md *lic);
471 struct dentry *ll_find_alias(struct inode *, struct dentry *);
472 int ll_md_blocking_ast(struct ldlm_lock *, struct ldlm_lock_desc *,
473 void *data, int flag);
474 #ifndef HAVE_VFS_INTENT_PATCHES
475 struct lookup_intent *ll_convert_intent(struct open_intent *oit,
480 int ll_prepare_write(struct file *, struct page *, unsigned from, unsigned to);
481 int ll_commit_write(struct file *, struct page *, unsigned from, unsigned to);
482 int ll_writepage(struct page *page);
483 void ll_inode_fill_obdo(struct inode *inode, int cmd, struct obdo *oa);
484 int ll_ap_completion(void *data, int cmd, struct obdo *oa, int rc);
485 int llap_shrink_cache(struct ll_sb_info *sbi, int shrink_fraction);
486 struct ll_async_page *llap_from_page(struct page *page, unsigned origin);
487 extern struct cache_definition ll_cache_definition;
488 void ll_removepage(struct page *page);
489 int ll_readpage(struct file *file, struct page *page);
490 struct ll_async_page *llap_cast_private(struct page *page);
491 void ll_readahead_init(struct inode *inode, struct ll_readahead_state *ras);
492 void ll_ra_accounting(struct ll_async_page *llap,struct address_space *mapping);
493 void ll_truncate(struct inode *inode);
494 int ll_sync_page_range(struct inode *, struct address_space *, loff_t, size_t);
497 extern struct file_operations ll_file_operations;
498 extern struct file_operations ll_file_operations_flock;
499 extern struct file_operations ll_file_operations_noflock;
500 extern struct inode_operations ll_file_inode_operations;
501 extern int ll_inode_revalidate_it(struct dentry *, struct lookup_intent *);
502 extern int ll_have_md_lock(struct inode *inode, __u64 bits);
503 extern ldlm_mode_t ll_take_md_lock(struct inode *inode, __u64 bits,
504 struct lustre_handle *lockh);
505 int ll_extent_lock(struct ll_file_data *, struct inode *,
506 struct lov_stripe_md *, int mode, ldlm_policy_data_t *,
507 struct lustre_handle *, int ast_flags);
508 int ll_extent_unlock(struct ll_file_data *, struct inode *,
509 struct lov_stripe_md *, int mode, struct lustre_handle *);
510 int ll_file_open(struct inode *inode, struct file *file);
511 int ll_file_release(struct inode *inode, struct file *file);
512 int ll_lsm_getattr(struct obd_export *, struct lov_stripe_md *, struct obdo *);
513 int ll_local_size(struct inode *inode);
514 int ll_glimpse_ioctl(struct ll_sb_info *sbi,
515 struct lov_stripe_md *lsm, lstat_t *st);
516 int ll_glimpse_size(struct inode *inode, int ast_flags);
517 int ll_local_open(struct file *file,
518 struct lookup_intent *it, struct ll_file_data *fd,
519 struct obd_client_handle *och);
520 int ll_release_openhandle(struct dentry *, struct lookup_intent *);
521 int ll_md_close(struct obd_export *md_exp, struct inode *inode,
523 int ll_md_real_close(struct inode *inode, int flags);
524 void ll_epoch_close(struct inode *inode, struct md_op_data *op_data,
525 struct obd_client_handle **och, unsigned long flags);
526 int ll_sizeonmds_update(struct inode *inode, struct md_open_data *data,
527 struct lustre_handle *fh, __u64 ioepoch);
528 int ll_inode_getattr(struct inode *inode, struct obdo *obdo);
529 int ll_md_setattr(struct inode *inode, struct md_op_data *op_data,
530 struct md_open_data **mod);
531 void ll_pack_inode2opdata(struct inode *inode, struct md_op_data *op_data,
532 struct lustre_handle *fh);
533 extern void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid, struct file
534 *file, size_t count, int rw);
535 int ll_getattr_it(struct vfsmount *mnt, struct dentry *de,
536 struct lookup_intent *it, struct kstat *stat);
537 int ll_getattr(struct vfsmount *mnt, struct dentry *de, struct kstat *stat);
538 struct ll_file_data *ll_file_data_get(void);
539 int ll_inode_permission(struct inode *inode, int mask, struct nameidata *nd);
540 int ll_lov_setstripe_ea_info(struct inode *inode, struct file *file,
541 int flags, struct lov_user_md *lum,
543 int ll_lov_getstripe_ea_info(struct inode *inode, const char *filename,
544 struct lov_mds_md **lmm, int *lmm_size,
545 struct ptlrpc_request **request);
546 int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump,
548 int ll_dir_getstripe(struct inode *inode, struct lov_mds_md **lmm,
549 int *lmm_size, struct ptlrpc_request **request);
552 void ll_intent_drop_lock(struct lookup_intent *);
553 void ll_intent_release(struct lookup_intent *);
554 int ll_drop_dentry(struct dentry *dentry);
555 extern void ll_set_dd(struct dentry *de);
556 int ll_drop_dentry(struct dentry *dentry);
557 void ll_unhash_aliases(struct inode *);
558 void ll_frob_intent(struct lookup_intent **itp, struct lookup_intent *deft);
559 void ll_lookup_finish_locks(struct lookup_intent *it, struct dentry *dentry);
560 int ll_dcompare(struct dentry *parent, struct qstr *d_name, struct qstr *name);
561 int ll_revalidate_it_finish(struct ptlrpc_request *request, int offset,
562 struct lookup_intent *it, struct dentry *de);
564 /* llite/llite_lib.c */
565 extern struct super_operations lustre_super_operations;
567 char *ll_read_opt(const char *opt, char *data);
568 void ll_lli_init(struct ll_inode_info *lli);
569 int ll_fill_super(struct super_block *sb);
570 void ll_put_super(struct super_block *sb);
571 void ll_kill_super(struct super_block *sb);
572 struct inode *ll_inode_from_lock(struct ldlm_lock *lock);
573 void ll_clear_inode(struct inode *inode);
574 int ll_setattr_raw(struct inode *inode, struct iattr *attr);
575 int ll_setattr(struct dentry *de, struct iattr *attr);
576 #ifndef HAVE_STATFS_DENTRY_PARAM
577 int ll_statfs(struct super_block *sb, struct kstatfs *sfs);
579 int ll_statfs(struct dentry *de, struct kstatfs *sfs);
581 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
583 void ll_update_inode(struct inode *inode, struct lustre_md *md);
584 void ll_read_inode2(struct inode *inode, void *opaque);
585 void ll_delete_inode(struct inode *inode);
586 int ll_iocontrol(struct inode *inode, struct file *file,
587 unsigned int cmd, unsigned long arg);
588 int ll_flush_ctx(struct inode *inode);
589 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
590 void ll_umount_begin(struct vfsmount *vfsmnt, int flags);
592 void ll_umount_begin(struct super_block *sb);
594 int ll_remount_fs(struct super_block *sb, int *flags, char *data);
595 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
596 int offset, struct super_block *);
597 void lustre_dump_dentry(struct dentry *, int recur);
598 void lustre_dump_inode(struct inode *);
599 struct ll_async_page *llite_pglist_next_llap(struct ll_sb_info *sbi,
600 struct list_head *list);
601 int ll_obd_statfs(struct inode *inode, void *arg);
602 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *max_mdsize);
603 int ll_process_config(struct lustre_cfg *lcfg);
604 int ll_ioctl_getfacl(struct inode *inode, struct rmtacl_ioctl_data *ioc);
605 int ll_ioctl_setfacl(struct inode *inode, struct rmtacl_ioctl_data *ioc);
606 struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
607 struct inode *i1, struct inode *i2,
608 const char *name, int namelen,
609 int mode, __u32 opc, void *data);
610 void ll_finish_md_op_data(struct md_op_data *op_data);
612 /* llite/llite_nfs.c */
613 extern struct export_operations lustre_export_operations;
614 __u32 get_uuid2int(const char *name, int len);
615 struct dentry *ll_fh_to_dentry(struct super_block *sb, __u32 *data, int len,
616 int fhtype, int parent);
617 int ll_dentry_to_fh(struct dentry *, __u32 *datap, int *lenp, int need_parent);
619 /* llite/special.c */
620 extern struct inode_operations ll_special_inode_operations;
621 extern struct file_operations ll_special_chr_inode_fops;
622 extern struct file_operations ll_special_chr_file_fops;
623 extern struct file_operations ll_special_blk_inode_fops;
624 extern struct file_operations ll_special_fifo_inode_fops;
625 extern struct file_operations ll_special_fifo_file_fops;
626 extern struct file_operations ll_special_sock_inode_fops;
628 /* llite/symlink.c */
629 extern struct inode_operations ll_fast_symlink_inode_operations;
631 /* llite/llite_close.c */
632 struct ll_close_queue {
634 struct list_head lcq_head;
635 wait_queue_head_t lcq_waitq;
636 struct completion lcq_comp;
640 void llap_write_pending(struct inode *inode, struct ll_async_page *llap);
641 int llap_write_complete(struct inode *inode, struct ll_async_page *llap);
642 int ll_inode_dirty(struct inode *inode, unsigned long flags);
643 void ll_queue_done_writing(struct inode *inode, unsigned long flags);
644 void ll_close_thread_shutdown(struct ll_close_queue *lcq);
645 int ll_close_thread_start(struct ll_close_queue **lcq_ret);
647 /* llite/llite_mmap.c */
648 typedef struct rb_root rb_root_t;
649 typedef struct rb_node rb_node_t;
651 struct ll_lock_tree_node;
652 struct ll_lock_tree {
654 struct list_head lt_locked_list;
655 struct ll_file_data *lt_fd;
658 int ll_teardown_mmaps(struct address_space *mapping, __u64 first, __u64 last);
659 int ll_file_mmap(struct file * file, struct vm_area_struct * vma);
660 struct ll_lock_tree_node * ll_node_from_inode(struct inode *inode, __u64 start,
661 __u64 end, ldlm_mode_t mode);
662 int ll_tree_lock(struct ll_lock_tree *tree,
663 struct ll_lock_tree_node *first_node,
664 const char *buf, size_t count, int ast_flags);
665 int ll_tree_unlock(struct ll_lock_tree *tree);
667 #define ll_s2sbi(sb) (s2lsi(sb)->lsi_llsbi)
669 void __d_rehash(struct dentry * entry, int lock);
670 static inline __u64 ll_ts2u64(struct timespec *time)
672 __u64 t = time->tv_sec;
676 /* don't need an addref as the sb_info should be holding one */
677 static inline struct obd_export *ll_s2dtexp(struct super_block *sb)
679 return ll_s2sbi(sb)->ll_dt_exp;
682 /* don't need an addref as the sb_info should be holding one */
683 static inline struct obd_export *ll_s2mdexp(struct super_block *sb)
685 return ll_s2sbi(sb)->ll_md_exp;
688 static inline struct client_obd *sbi2mdc(struct ll_sb_info *sbi)
690 struct obd_device *obd = sbi->ll_md_exp->exp_obd;
696 // FIXME: replace the name of this with LL_SB to conform to kernel stuff
697 static inline struct ll_sb_info *ll_i2sbi(struct inode *inode)
699 return ll_s2sbi(inode->i_sb);
702 static inline struct obd_export *ll_i2dtexp(struct inode *inode)
704 return ll_s2dtexp(inode->i_sb);
707 static inline struct obd_export *ll_i2mdexp(struct inode *inode)
709 return ll_s2mdexp(inode->i_sb);
712 static inline struct lu_fid *ll_inode2fid(struct inode *inode)
715 LASSERT(inode != NULL);
716 fid = &ll_i2info(inode)->lli_fid;
717 LASSERT(fid_is_igif(fid) || fid_ver(fid) == 0);
721 static inline int ll_mds_max_easize(struct super_block *sb)
723 return sbi2mdc(ll_s2sbi(sb))->cl_max_mds_easize;
726 static inline __u64 ll_file_maxbytes(struct inode *inode)
728 return ll_i2info(inode)->lli_maxbytes;
732 int ll_setxattr(struct dentry *dentry, const char *name,
733 const void *value, size_t size, int flags);
734 ssize_t ll_getxattr(struct dentry *dentry, const char *name,
735 void *buffer, size_t size);
736 ssize_t ll_listxattr(struct dentry *dentry, char *buffer, size_t size);
737 int ll_removexattr(struct dentry *dentry, const char *name);
739 /* llite/remote_perm.c */
740 extern cfs_mem_cache_t *ll_remote_perm_cachep;
741 extern cfs_mem_cache_t *ll_rmtperm_hash_cachep;
743 struct hlist_head *alloc_rmtperm_hash(void);
744 void free_rmtperm_hash(struct hlist_head *hash);
745 int ll_update_remote_perm(struct inode *inode, struct mdt_remote_perm *perm);
746 int lustre_check_remote_perm(struct inode *inode, int mask);
748 /* llite/llite_fid.c */
749 ino_t ll_fid_build_ino(struct ll_sb_info *sbi, struct lu_fid *fid);
751 /* llite/llite_capa.c */
752 extern cfs_timer_t ll_capa_timer;
754 int ll_capa_thread_start(void);
755 void ll_capa_thread_stop(void);
756 void ll_capa_timer_callback(unsigned long unused);
758 struct obd_capa *ll_add_capa(struct inode *inode, struct obd_capa *ocapa);
759 int ll_update_capa(struct obd_capa *ocapa, struct lustre_capa *capa);
761 void ll_capa_open(struct inode *inode);
762 void ll_capa_close(struct inode *inode);
764 struct obd_capa *ll_mdscapa_get(struct inode *inode);
765 struct obd_capa *ll_osscapa_get(struct inode *inode, __u64 opc);
767 void ll_truncate_free_capa(struct obd_capa *ocapa);
768 void ll_clear_inode_capas(struct inode *inode);
769 void ll_print_capa_stat(struct ll_sb_info *sbi);
771 /* llite ioctl register support rountine */
778 #define LLIOC_MAX_CMD 256
781 * Rules to write a callback function:
784 * @magic: Dynamic ioctl call routine will feed this vaule with the pointer
785 * returned to ll_iocontrol_register. Callback functions should use this
786 * data to check the potential collasion of ioctl cmd. If collasion is
787 * found, callback function should return LLIOC_CONT.
788 * @rcp: The result of ioctl command.
791 * If @magic matches the pointer returned by ll_iocontrol_data, the
792 * callback should return LLIOC_STOP; return LLIOC_STOP otherwise.
794 typedef enum llioc_iter (*llioc_callback_t)(struct inode *inode,
795 struct file *file, unsigned int cmd, unsigned long arg,
796 void *magic, int *rcp);
798 enum llioc_iter ll_iocontrol_call(struct inode *inode, struct file *file,
799 unsigned int cmd, unsigned long arg, int *rcp);
801 /* export functions */
802 /* Register ioctl block dynamatically for a regular file.
804 * @cmd: the array of ioctl command set
805 * @count: number of commands in the @cmd
806 * @cb: callback function, it will be called if an ioctl command is found to
807 * belong to the command list @cmd.
810 * A magic pointer will be returned if success;
811 * otherwise, NULL will be returned.
813 void *ll_iocontrol_register(llioc_callback_t cb, int count, unsigned int *cmd);
814 void ll_iocontrol_unregister(void *magic);
818 #endif /* LLITE_INTERNAL_H */