1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
37 #ifndef LLITE_INTERNAL_H
38 #define LLITE_INTERNAL_H
40 #include <lustre_acl.h>
42 #include <lustre_debug.h>
43 #include <lustre_ver.h>
44 #include <lustre_disk.h> /* for s2sbi */
45 #include <lustre_eacl.h>
47 /* for struct cl_lock_descr and struct cl_io */
48 #include <cl_object.h>
55 #define LL_IT2STR(it) ((it) ? ldlm_it2str((it)->it_op) : "0")
56 #define LUSTRE_FPRIVATE(file) ((file)->private_data)
58 #ifdef HAVE_VFS_INTENT_PATCHES
59 static inline struct lookup_intent *ll_nd2it(struct nameidata *nd)
65 struct ll_dentry_data {
68 struct obd_client_handle lld_cwd_och;
69 struct obd_client_handle lld_mnt_och;
70 #ifndef HAVE_VFS_INTENT_PATCHES
71 struct lookup_intent *lld_it;
73 unsigned int lld_sa_generation;
76 #define ll_d2d(de) ((struct ll_dentry_data*)((de)->d_fsdata))
78 extern struct file_operations ll_pgcache_seq_fops;
80 #define LLI_INODE_MAGIC 0x111d0de5
81 #define LLI_INODE_DEAD 0xdeadd00d
83 /* remote client permission cache */
84 #define REMOTE_PERM_HASHSIZE 16
86 /* llite setxid/access permission for user on remote client */
87 struct ll_remote_perm {
88 struct hlist_node lrp_list;
93 int lrp_access_perm; /* MAY_READ/WRITE/EXEC, this
94 is access permission with
95 lrp_fsuid/lrp_fsgid. */
99 /* MDS has an authority for the Size-on-MDS attributes. */
100 LLIF_MDS_SIZE_LOCK = (1 << 0),
101 /* Epoch close is postponed. */
102 LLIF_EPOCH_PENDING = (1 << 1),
103 /* DONE WRITING is allowed. */
104 LLIF_DONE_WRITING = (1 << 2),
105 /* Sizeon-on-MDS attributes are changed. An attribute update needs to
107 LLIF_SOM_DIRTY = (1 << 3),
108 /* File is contented */
109 LLIF_CONTENDED = (1 << 4),
110 /* Truncate uses server lock for this file */
111 LLIF_SRVLOCK = (1 << 5)
115 struct ll_inode_info {
117 struct semaphore lli_size_sem; /* protect open and change size */
118 void *lli_size_sem_owner;
119 struct semaphore lli_write_sem;
120 char *lli_symlink_name;
123 unsigned long lli_flags;
124 cfs_time_t lli_contention_time;
126 /* this lock protects posix_acl, pending_write_llaps, mmap_cnt */
128 struct list_head lli_close_list;
129 /* handle is to be sent to MDS later on done_writing and setattr.
130 * Open handle data are needed for the recovery to reconstruct
131 * the inode state on the MDS. XXX: recovery is not ready yet. */
132 struct obd_client_handle *lli_pending_och;
134 /* for writepage() only to communicate to fsync */
137 struct posix_acl *lli_posix_acl;
139 /* remote permission hash */
140 struct hlist_head *lli_remote_perms;
141 unsigned long lli_rmtperm_utime;
142 struct semaphore lli_rmtperm_sem;
144 struct list_head lli_dead_list;
146 struct semaphore lli_och_sem; /* Protects access to och pointers
147 and their usage counters */
148 /* We need all three because every inode may be opened in different
150 struct obd_client_handle *lli_mds_read_och;
151 __u64 lli_open_fd_read_count;
152 struct obd_client_handle *lli_mds_write_och;
153 __u64 lli_open_fd_write_count;
154 struct obd_client_handle *lli_mds_exec_och;
155 __u64 lli_open_fd_exec_count;
157 struct inode lli_vfs_inode;
159 /* identifying fields for both metadata and data stacks. */
160 struct lu_fid lli_fid;
161 struct lov_stripe_md *lli_smd;
164 /* open count currently used by capability only, indicate whether
165 * capability needs renewal */
166 atomic_t lli_open_count;
167 struct obd_capa *lli_mds_capa;
168 struct list_head lli_oss_capas;
170 /* metadata stat-ahead */
172 * "opendir_pid" is the token when lookup/revalid -- I am the owner of
175 pid_t lli_opendir_pid;
177 * since parent-child threads can share the same @file struct,
178 * "opendir_key" is the token when dir close for case of parent exit
179 * before child -- it is me should cleanup the dir readahead. */
180 void *lli_opendir_key;
181 struct ll_statahead_info *lli_sai;
182 struct cl_object *lli_clob;
186 * Locking to guarantee consistency of non-atomic updates to long long i_size,
187 * consistency between file size and KMS, and consistency within
188 * ->lli_smd->lsm_oinfo[]'s.
190 * Implemented by ->lli_size_sem and ->lsm_sem, nested in that order.
193 void ll_inode_size_lock(struct inode *inode, int lock_lsm);
194 void ll_inode_size_unlock(struct inode *inode, int unlock_lsm);
196 // FIXME: replace the name of this with LL_I to conform to kernel stuff
197 // static inline struct ll_inode_info *LL_I(struct inode *inode)
198 static inline struct ll_inode_info *ll_i2info(struct inode *inode)
200 return container_of(inode, struct ll_inode_info, lli_vfs_inode);
203 /* default to about 40meg of readahead on a given system. That much tied
204 * up in 512k readahead requests serviced at 40ms each is about 1GB/s. */
205 #define SBI_DEFAULT_READAHEAD_MAX (40UL << (20 - CFS_PAGE_SHIFT))
207 /* default to read-ahead full files smaller than 2MB on the second read */
208 #define SBI_DEFAULT_READAHEAD_WHOLE_MAX (2UL << (20 - CFS_PAGE_SHIFT))
213 RA_STAT_DISTANT_READPAGE,
214 RA_STAT_MISS_IN_WINDOW,
215 RA_STAT_FAILED_GRAB_PAGE,
216 RA_STAT_FAILED_MATCH,
221 RA_STAT_MAX_IN_FLIGHT,
222 RA_STAT_WRONG_GRAB_PAGE,
227 atomic_t ra_cur_pages;
228 unsigned long ra_max_pages;
229 unsigned long ra_max_pages_per_file;
230 unsigned long ra_max_read_ahead_whole_pages;
233 /* ra_io_arg will be filled in the beginning of ll_readahead with
234 * ras_lock, then the following ll_read_ahead_pages will read RA
235 * pages according to this arg, all the items in this structure are
236 * counted by page index.
239 unsigned long ria_start; /* start offset of read-ahead*/
240 unsigned long ria_end; /* end offset of read-ahead*/
241 /* If stride read pattern is detected, ria_stoff means where
242 * stride read is started. Note: for normal read-ahead, the
243 * value here is meaningless, and also it will not be accessed*/
245 /* ria_length and ria_pages are the length and pages length in the
246 * stride I/O mode. And they will also be used to check whether
247 * it is stride I/O read-ahead in the read-ahead pages*/
248 unsigned long ria_length;
249 unsigned long ria_pages;
252 /* LL_HIST_MAX=32 causes an overflow */
253 #define LL_HIST_MAX 28
254 #define LL_HIST_START 12 /* buckets start at 2^12 = 4k */
255 #define LL_PROCESS_HIST_MAX 10
256 struct per_process_info {
258 struct obd_histogram pp_r_hist;
259 struct obd_histogram pp_w_hist;
262 /* pp_extents[LL_PROCESS_HIST_MAX] will hold the combined process info */
263 struct ll_rw_extents_info {
264 struct per_process_info pp_extents[LL_PROCESS_HIST_MAX + 1];
267 #define LL_OFFSET_HIST_MAX 100
268 struct ll_rw_process_info {
271 loff_t rw_range_start;
273 loff_t rw_last_file_pos;
275 size_t rw_smallest_extent;
276 size_t rw_largest_extent;
277 struct ll_file_data *rw_last_file;
280 enum stats_track_type {
281 STATS_TRACK_ALL = 0, /* track all processes */
282 STATS_TRACK_PID, /* track process with this pid */
283 STATS_TRACK_PPID, /* track processes with this ppid */
284 STATS_TRACK_GID, /* track processes with this gid */
288 /* flags for sbi->ll_flags */
289 #define LL_SBI_NOLCK 0x01 /* DLM locking disabled (directio-only) */
290 #define LL_SBI_CHECKSUM 0x02 /* checksum each page as it's written */
291 #define LL_SBI_FLOCK 0x04
292 #define LL_SBI_USER_XATTR 0x08 /* support user xattr */
293 #define LL_SBI_ACL 0x10 /* support ACL */
294 #define LL_SBI_JOIN 0x20 /* support JOIN */
295 #define LL_SBI_RMT_CLIENT 0x40 /* remote client */
296 #define LL_SBI_MDS_CAPA 0x80 /* support mds capa */
297 #define LL_SBI_OSS_CAPA 0x100 /* support oss capa */
298 #define LL_SBI_LOCALFLOCK 0x200 /* Local flocks support by kernel */
299 #define LL_SBI_LRU_RESIZE 0x400 /* lru resize support */
300 #define LL_SBI_LAZYSTATFS 0x800 /* lazystatfs mount option */
302 /* default value for ll_sb_info->contention_time */
303 #define SBI_DEFAULT_CONTENTION_SECONDS 60
304 /* default value for lockless_truncate_enable */
305 #define SBI_DEFAULT_LOCKLESS_TRUNCATE_ENABLE 1
306 #define RCE_HASHES 32
308 struct rmtacl_ctl_entry {
309 struct list_head rce_list;
310 pid_t rce_key; /* hash key */
311 int rce_ops; /* acl operation type */
314 struct rmtacl_ctl_table {
316 struct list_head rct_entries[RCE_HASHES];
322 struct list_head ee_list;
323 pid_t ee_key; /* hash key */
324 struct lu_fid ee_fid;
325 int ee_type; /* ACL type for ACCESS or DEFAULT */
326 ext_acl_xattr_header *ee_acl;
331 struct list_head et_entries[EE_HASHES];
335 struct list_head ll_list;
336 /* this protects pglist and ra_info. It isn't safe to
337 * grab from interrupt contexts */
339 spinlock_t ll_pp_extent_lock; /* Lock for pp_extent entries */
340 spinlock_t ll_process_lock; /* Lock for ll_rw_process_info */
341 struct obd_uuid ll_sb_uuid;
342 struct obd_export *ll_md_exp;
343 struct obd_export *ll_dt_exp;
344 struct proc_dir_entry* ll_proc_root;
345 struct lu_fid ll_root_fid; /* root object fid */
348 struct list_head ll_conn_chain; /* per-conn chain of SBs */
349 struct lustre_client_ocd ll_lco;
351 struct list_head ll_orphan_dentry_list; /*please don't ask -p*/
352 struct ll_close_queue *ll_lcq;
354 struct lprocfs_stats *ll_stats; /* lprocfs stats counter */
356 unsigned long ll_async_page_max;
357 unsigned long ll_async_page_count;
359 struct lprocfs_stats *ll_ra_stats;
361 struct ll_ra_info ll_ra_info;
362 unsigned int ll_namelen;
363 struct file_operations *ll_fop;
365 #ifdef HAVE_EXPORT___IGET
366 struct list_head ll_deathrow; /* inodes to be destroyed (b1443) */
367 spinlock_t ll_deathrow_lock;
369 /* =0 - hold lock over whole read/write
370 * >0 - max. chunk to be read/written w/o lock re-acquiring */
371 unsigned long ll_max_rw_chunk;
373 struct lu_site *ll_site;
374 struct cl_device *ll_cl;
376 struct ll_rw_extents_info ll_rw_extents_info;
377 int ll_extent_process_count;
378 struct ll_rw_process_info ll_rw_process_info[LL_PROCESS_HIST_MAX];
379 unsigned int ll_offset_process_count;
380 struct ll_rw_process_info ll_rw_offset_info[LL_OFFSET_HIST_MAX];
381 unsigned int ll_rw_offset_entry_count;
382 enum stats_track_type ll_stats_track_type;
383 int ll_stats_track_id;
386 /* metadata stat-ahead */
387 unsigned int ll_sa_max; /* max statahead RPCs */
388 unsigned int ll_sa_wrong; /* statahead thread stopped for
390 unsigned int ll_sa_total; /* statahead thread started
392 unsigned long long ll_sa_blocked; /* ls count waiting for
394 unsigned long long ll_sa_cached; /* ls count got in cache */
395 unsigned long long ll_sa_hit; /* hit count */
396 unsigned long long ll_sa_miss; /* miss count */
398 dev_t ll_sdev_orig; /* save s_dev before assign for
400 struct rmtacl_ctl_table ll_rct;
401 struct eacl_table ll_et;
404 #define LL_DEFAULT_MAX_RW_CHUNK (32 * 1024 * 1024)
409 struct task_struct *lrr_reader;
410 struct list_head lrr_linkage;
414 * per file-descriptor read-ahead data.
416 struct ll_readahead_state {
419 * index of the last page that read(2) needed and that wasn't in the
420 * cache. Used by ras_update() to detect seeks.
422 * XXX nikita: if access seeks into cached region, Lustre doesn't see
425 unsigned long ras_last_readpage;
427 * number of pages read after last read-ahead window reset. As window
428 * is reset on each seek, this is effectively a number of consecutive
429 * accesses. Maybe ->ras_accessed_in_window is better name.
431 * XXX nikita: window is also reset (by ras_update()) when Lustre
432 * believes that memory pressure evicts read-ahead pages. In that
433 * case, it probably doesn't make sense to expand window to
434 * PTLRPC_MAX_BRW_PAGES on the third access.
436 unsigned long ras_consecutive_pages;
438 * number of read requests after the last read-ahead window reset
439 * As window is reset on each seek, this is effectively the number
440 * on consecutive read request and is used to trigger read-ahead.
442 unsigned long ras_consecutive_requests;
444 * Parameters of current read-ahead window. Handled by
445 * ras_update(). On the initial access to the file or after a seek,
446 * window is reset to 0. After 3 consecutive accesses, window is
447 * expanded to PTLRPC_MAX_BRW_PAGES. Afterwards, window is enlarged by
448 * PTLRPC_MAX_BRW_PAGES chunks up to ->ra_max_pages.
450 unsigned long ras_window_start, ras_window_len;
452 * Where next read-ahead should start at. This lies within read-ahead
453 * window. Read-ahead window is read in pieces rather than at once
454 * because: 1. lustre limits total number of pages under read-ahead by
455 * ->ra_max_pages (see ll_ra_count_get()), 2. client cannot read pages
456 * not covered by DLM lock.
458 unsigned long ras_next_readahead;
460 * Total number of ll_file_read requests issued, reads originating
461 * due to mmap are not counted in this total. This value is used to
462 * trigger full file read-ahead after multiple reads to a small file.
464 unsigned long ras_requests;
466 * Page index with respect to the current request, these value
467 * will not be accurate when dealing with reads issued via mmap.
469 unsigned long ras_request_index;
471 * list of struct ll_ra_read's one per read(2) call current in
472 * progress against this file descriptor. Used by read-ahead code,
473 * protected by ->ras_lock.
475 struct list_head ras_read_beads;
477 * The following 3 items are used for detecting the stride I/O
479 * In stride I/O mode,
480 * ...............|-----data-----|****gap*****|--------|******|....
481 * offset |-stride_pages-|-stride_gap-|
482 * ras_stride_offset = offset;
483 * ras_stride_length = stride_pages + stride_gap;
484 * ras_stride_pages = stride_pages;
485 * Note: all these three items are counted by pages.
487 unsigned long ras_stride_length;
488 unsigned long ras_stride_pages;
489 pgoff_t ras_stride_offset;
491 * number of consecutive stride request count, and it is similar as
492 * ras_consecutive_requests, but used for stride I/O mode.
493 * Note: only more than 2 consecutive stride request are detected,
494 * stride read-ahead will be enable
496 unsigned long ras_consecutive_stride_requests;
502 extern cfs_mem_cache_t *ll_file_data_slab;
503 struct lustre_handle;
504 struct ll_file_data {
505 struct ll_readahead_state fd_ras;
507 struct ccc_grouplock fd_grouplock;
508 struct ll_file_dir fd_dir;
510 struct file *fd_file;
513 struct lov_stripe_md;
515 extern spinlock_t inode_lock;
517 extern struct proc_dir_entry *proc_lustre_fs_root;
519 static inline struct inode *ll_info2i(struct ll_inode_info *lli)
521 return &lli->lli_vfs_inode;
525 struct inode *icbd_parent;
526 struct dentry **icbd_childp;
530 __u32 ll_i2suppgid(struct inode *i);
531 void ll_i2gids(__u32 *suppgids, struct inode *i1,struct inode *i2);
533 #define LLAP_MAGIC 98764321
535 extern cfs_mem_cache_t *ll_async_page_slab;
536 extern size_t ll_async_page_slab_size;
538 #ifdef HAVE_REGISTER_CACHE
539 #include <linux/cache_def.h>
540 #define ll_register_cache(cache) register_cache(cache)
541 #define ll_unregister_cache(cache) unregister_cache(cache)
542 #elif defined(HAVE_SHRINKER_CACHE)
543 struct cache_definition {
546 struct shrinker *shrinker;
549 #define ll_register_cache(cache) do { \
550 struct cache_definition *c = (cache); \
551 c->shrinker = set_shrinker(DEFAULT_SEEKS, c->shrink); \
554 #define ll_unregister_cache(cache) do { \
555 remove_shrinker((cache)->shrinker); \
556 (cache)->shrinker = NULL; \
559 #define ll_register_cache(cache) do {} while (0)
560 #define ll_unregister_cache(cache) do {} while (0)
563 void ll_ra_read_in(struct file *f, struct ll_ra_read *rar);
564 void ll_ra_read_ex(struct file *f, struct ll_ra_read *rar);
565 struct ll_ra_read *ll_ra_read_get(struct file *f);
567 /* llite/lproc_llite.c */
569 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
570 struct super_block *sb, char *osc, char *mdc);
571 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi);
572 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count);
573 void lprocfs_llite_init_vars(struct lprocfs_static_vars *lvars);
575 static inline int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
576 struct super_block *sb, char *osc, char *mdc){return 0;}
577 static inline void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi) {}
578 static void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count) {}
579 static void lprocfs_llite_init_vars(struct lprocfs_static_vars *lvars)
581 memset(lvars, 0, sizeof(*lvars));
587 static inline void ll_put_page(struct page *page)
590 page_cache_release(page);
593 extern struct file_operations ll_dir_operations;
594 extern struct inode_operations ll_dir_inode_operations;
595 struct page *ll_get_dir_page(struct inode *dir, __u64 hash, int exact,
596 struct ll_dir_chain *chain);
598 int ll_objects_destroy(struct ptlrpc_request *request,
600 struct inode *ll_iget(struct super_block *sb, ino_t hash,
601 struct lustre_md *lic);
602 int ll_md_blocking_ast(struct ldlm_lock *, struct ldlm_lock_desc *,
603 void *data, int flag);
604 #ifndef HAVE_VFS_INTENT_PATCHES
605 struct lookup_intent *ll_convert_intent(struct open_intent *oit,
608 int ll_lookup_it_finish(struct ptlrpc_request *request,
609 struct lookup_intent *it, void *data);
610 void ll_lookup_finish_locks(struct lookup_intent *it, struct dentry *dentry);
613 int ll_prepare_write(struct file *, struct page *, unsigned from, unsigned to);
614 int ll_commit_write(struct file *, struct page *, unsigned from, unsigned to);
615 int ll_writepage(struct page *page, struct writeback_control *wbc);
616 void ll_removepage(struct page *page);
617 int ll_readpage(struct file *file, struct page *page);
618 void ll_readahead_init(struct inode *inode, struct ll_readahead_state *ras);
619 void ll_truncate(struct inode *inode);
620 int ll_file_punch(struct inode *, loff_t, int);
621 ssize_t ll_file_lockless_io(struct file *, char *, size_t, loff_t *, int);
622 void ll_clear_file_contended(struct inode*);
623 int ll_sync_page_range(struct inode *, struct address_space *, loff_t, size_t);
624 int ll_readahead(const struct lu_env *env, struct cl_io *io, struct ll_readahead_state *ras,
625 struct address_space *mapping, struct cl_page_list *queue, int flags);
628 extern struct file_operations ll_file_operations;
629 extern struct file_operations ll_file_operations_flock;
630 extern struct file_operations ll_file_operations_noflock;
631 extern struct inode_operations ll_file_inode_operations;
632 extern int ll_inode_revalidate_it(struct dentry *, struct lookup_intent *);
633 extern int ll_have_md_lock(struct inode *inode, __u64 bits);
634 extern ldlm_mode_t ll_take_md_lock(struct inode *inode, __u64 bits,
635 struct lustre_handle *lockh);
636 int __ll_inode_revalidate_it(struct dentry *, struct lookup_intent *, __u64 bits);
637 int ll_revalidate_nd(struct dentry *dentry, struct nameidata *nd);
638 int ll_file_open(struct inode *inode, struct file *file);
639 int ll_file_release(struct inode *inode, struct file *file);
640 int ll_glimpse_ioctl(struct ll_sb_info *sbi,
641 struct lov_stripe_md *lsm, lstat_t *st);
642 void ll_ioepoch_open(struct ll_inode_info *lli, __u64 ioepoch);
643 int ll_local_open(struct file *file,
644 struct lookup_intent *it, struct ll_file_data *fd,
645 struct obd_client_handle *och);
646 int ll_release_openhandle(struct dentry *, struct lookup_intent *);
647 int ll_md_close(struct obd_export *md_exp, struct inode *inode,
649 int ll_md_real_close(struct inode *inode, int flags);
650 void ll_epoch_close(struct inode *inode, struct md_op_data *op_data,
651 struct obd_client_handle **och, unsigned long flags);
652 int ll_sizeonmds_update(struct inode *inode, struct lustre_handle *fh,
654 int ll_inode_getattr(struct inode *inode, struct obdo *obdo);
655 int ll_md_setattr(struct inode *inode, struct md_op_data *op_data,
656 struct md_open_data **mod);
657 void ll_pack_inode2opdata(struct inode *inode, struct md_op_data *op_data,
658 struct lustre_handle *fh);
659 extern void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
660 struct ll_file_data *file, loff_t pos,
661 size_t count, int rw);
662 int ll_getattr_it(struct vfsmount *mnt, struct dentry *de,
663 struct lookup_intent *it, struct kstat *stat);
664 int ll_getattr(struct vfsmount *mnt, struct dentry *de, struct kstat *stat);
665 struct ll_file_data *ll_file_data_get(void);
666 int ll_inode_permission(struct inode *inode, int mask, struct nameidata *nd);
667 int ll_lov_setstripe_ea_info(struct inode *inode, struct file *file,
668 int flags, struct lov_user_md *lum,
670 int ll_lov_getstripe_ea_info(struct inode *inode, const char *filename,
671 struct lov_mds_md **lmm, int *lmm_size,
672 struct ptlrpc_request **request);
673 int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump,
675 int ll_dir_getstripe(struct inode *inode, struct lov_mds_md **lmm,
676 int *lmm_size, struct ptlrpc_request **request);
677 int ll_fsync(struct file *file, struct dentry *dentry, int data);
678 int ll_fiemap(struct inode *inode, struct ll_user_fiemap *fiemap,
680 int ll_merge_lvb(struct inode *inode);
681 int ll_get_grouplock(struct inode *inode, struct file *file, unsigned long arg);
682 int ll_put_grouplock(struct inode *inode, struct file *file, unsigned long arg);
683 int ll_fid2path(struct obd_export *exp, void *arg);
688 * protect race ll_find_aliases vs ll_revalidate_it vs ll_unhash_aliases
690 extern spinlock_t ll_lookup_lock;
691 extern struct dentry_operations ll_d_ops;
692 void ll_intent_drop_lock(struct lookup_intent *);
693 void ll_intent_release(struct lookup_intent *);
694 int ll_drop_dentry(struct dentry *dentry);
695 extern void ll_set_dd(struct dentry *de);
696 int ll_drop_dentry(struct dentry *dentry);
697 void ll_unhash_aliases(struct inode *);
698 void ll_frob_intent(struct lookup_intent **itp, struct lookup_intent *deft);
699 void ll_lookup_finish_locks(struct lookup_intent *it, struct dentry *dentry);
700 int ll_dcompare(struct dentry *parent, struct qstr *d_name, struct qstr *name);
701 int ll_revalidate_it_finish(struct ptlrpc_request *request,
702 struct lookup_intent *it, struct dentry *de);
704 /* llite/llite_lib.c */
705 extern struct super_operations lustre_super_operations;
707 char *ll_read_opt(const char *opt, char *data);
708 void ll_lli_init(struct ll_inode_info *lli);
709 int ll_fill_super(struct super_block *sb);
710 void ll_put_super(struct super_block *sb);
711 void ll_kill_super(struct super_block *sb);
712 struct inode *ll_inode_from_lock(struct ldlm_lock *lock);
713 void ll_clear_inode(struct inode *inode);
714 int ll_setattr_raw(struct inode *inode, struct iattr *attr);
715 int ll_setattr(struct dentry *de, struct iattr *attr);
716 #ifndef HAVE_STATFS_DENTRY_PARAM
717 int ll_statfs(struct super_block *sb, struct kstatfs *sfs);
719 int ll_statfs(struct dentry *de, struct kstatfs *sfs);
721 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
722 __u64 max_age, __u32 flags);
723 void ll_update_inode(struct inode *inode, struct lustre_md *md);
724 void ll_read_inode2(struct inode *inode, void *opaque);
725 void ll_delete_inode(struct inode *inode);
726 int ll_iocontrol(struct inode *inode, struct file *file,
727 unsigned int cmd, unsigned long arg);
728 int ll_flush_ctx(struct inode *inode);
729 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
730 void ll_umount_begin(struct vfsmount *vfsmnt, int flags);
732 void ll_umount_begin(struct super_block *sb);
734 int ll_remount_fs(struct super_block *sb, int *flags, char *data);
735 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs);
736 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
737 struct super_block *);
738 void lustre_dump_dentry(struct dentry *, int recur);
739 void lustre_dump_inode(struct inode *);
740 int ll_obd_statfs(struct inode *inode, void *arg);
741 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *max_mdsize);
742 int ll_process_config(struct lustre_cfg *lcfg);
743 struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
744 struct inode *i1, struct inode *i2,
745 const char *name, int namelen,
746 int mode, __u32 opc, void *data);
747 void ll_finish_md_op_data(struct md_op_data *op_data);
749 /* llite/llite_nfs.c */
750 extern struct export_operations lustre_export_operations;
751 __u32 get_uuid2int(const char *name, int len);
752 struct dentry *ll_fh_to_dentry(struct super_block *sb, __u32 *data, int len,
753 int fhtype, int parent);
754 int ll_dentry_to_fh(struct dentry *, __u32 *datap, int *lenp, int need_parent);
756 /* llite/special.c */
757 extern struct inode_operations ll_special_inode_operations;
758 extern struct file_operations ll_special_chr_inode_fops;
759 extern struct file_operations ll_special_chr_file_fops;
760 extern struct file_operations ll_special_blk_inode_fops;
761 extern struct file_operations ll_special_fifo_inode_fops;
762 extern struct file_operations ll_special_fifo_file_fops;
763 extern struct file_operations ll_special_sock_inode_fops;
765 /* llite/symlink.c */
766 extern struct inode_operations ll_fast_symlink_inode_operations;
768 /* llite/llite_close.c */
769 struct ll_close_queue {
771 struct list_head lcq_head;
772 wait_queue_head_t lcq_waitq;
773 struct completion lcq_comp;
777 struct vvp_thread_info {
778 struct ost_lvb vti_lvb;
779 struct cl_2queue vti_queue;
780 struct iovec vti_local_iov;
781 struct ccc_io_args vti_args;
782 struct ra_io_arg vti_ria;
783 struct kiocb vti_kiocb;
786 struct ccc_object *cl_inode2ccc(struct inode *inode);
788 static inline struct vvp_thread_info *vvp_env_info(const struct lu_env *env)
790 extern struct lu_context_key vvp_key;
791 struct vvp_thread_info *info;
793 info = lu_context_key_get(&env->le_ctx, &vvp_key);
794 LASSERT(info != NULL);
798 void vvp_write_pending (struct ccc_object *club, struct ccc_page *page);
799 void vvp_write_complete(struct ccc_object *club, struct ccc_page *page);
804 read_actor_t cui_actor;
807 struct vvp_fault_io {
809 * Inode modification time that is checked across DLM
813 struct vm_area_struct *ft_vma;
815 * Virtual address at which fault occurred.
817 unsigned long ft_address;
819 * Fault type, as to be supplied to filemap_nopage().
825 * Read-ahead state used by read and page-fault IO contexts.
827 struct ll_ra_read cui_bead;
829 * Set when cui_bead has been initialized.
831 int cui_ra_window_set;
833 * If IO was created directly in low level method like
834 * ->prepare_write(), this field stores the number of method calls
835 * that constitute this IO. This field is decremented by ll_cl_fini(),
836 * and cl_io is destroyed, when it reaches 0. When oneshot IO
837 * completes, this fields is set to -1.
842 * Partially truncated page, that vvp_io_trunc_start() keeps locked
845 struct cl_page *cui_partpage;
849 struct vvp_io vs_ios;
852 static inline struct vvp_session *vvp_env_session(const struct lu_env *env)
854 extern struct lu_context_key vvp_session_key;
855 struct vvp_session *ses;
857 ses = lu_context_key_get(env->le_ses, &vvp_session_key);
858 LASSERT(ses != NULL);
862 static inline struct vvp_io *vvp_env_io(const struct lu_env *env)
864 return &vvp_env_session(env)->vs_ios;
867 void ll_queue_done_writing(struct inode *inode, unsigned long flags);
868 void ll_close_thread_shutdown(struct ll_close_queue *lcq);
869 int ll_close_thread_start(struct ll_close_queue **lcq_ret);
871 /* llite/llite_mmap.c */
872 typedef struct rb_root rb_root_t;
873 typedef struct rb_node rb_node_t;
875 struct ll_lock_tree_node;
876 struct ll_lock_tree {
878 struct list_head lt_locked_list;
879 struct ll_file_data *lt_fd;
882 int ll_teardown_mmaps(struct address_space *mapping, __u64 first, __u64 last);
883 int ll_file_mmap(struct file * file, struct vm_area_struct * vma);
884 struct ll_lock_tree_node * ll_node_from_inode(struct inode *inode, __u64 start,
885 __u64 end, ldlm_mode_t mode);
886 void policy_from_vma(ldlm_policy_data_t *policy,
887 struct vm_area_struct *vma, unsigned long addr, size_t count);
888 struct vm_area_struct *our_vma(unsigned long addr, size_t count);
890 #define ll_s2sbi(sb) (s2lsi(sb)->lsi_llsbi)
892 static inline __u64 ll_ts2u64(struct timespec *time)
894 __u64 t = time->tv_sec;
898 /* don't need an addref as the sb_info should be holding one */
899 static inline struct obd_export *ll_s2dtexp(struct super_block *sb)
901 return ll_s2sbi(sb)->ll_dt_exp;
904 /* don't need an addref as the sb_info should be holding one */
905 static inline struct obd_export *ll_s2mdexp(struct super_block *sb)
907 return ll_s2sbi(sb)->ll_md_exp;
910 static inline struct client_obd *sbi2mdc(struct ll_sb_info *sbi)
912 struct obd_device *obd = sbi->ll_md_exp->exp_obd;
918 // FIXME: replace the name of this with LL_SB to conform to kernel stuff
919 static inline struct ll_sb_info *ll_i2sbi(struct inode *inode)
921 return ll_s2sbi(inode->i_sb);
924 static inline struct obd_export *ll_i2dtexp(struct inode *inode)
926 return ll_s2dtexp(inode->i_sb);
929 static inline struct obd_export *ll_i2mdexp(struct inode *inode)
931 return ll_s2mdexp(inode->i_sb);
934 static inline struct lu_fid *ll_inode2fid(struct inode *inode)
937 LASSERT(inode != NULL);
938 fid = &ll_i2info(inode)->lli_fid;
939 LASSERT(fid_is_igif(fid) || fid_ver(fid) == 0);
943 static inline int ll_mds_max_easize(struct super_block *sb)
945 return sbi2mdc(ll_s2sbi(sb))->cl_max_mds_easize;
948 static inline __u64 ll_file_maxbytes(struct inode *inode)
950 return ll_i2info(inode)->lli_maxbytes;
954 int ll_setxattr(struct dentry *dentry, const char *name,
955 const void *value, size_t size, int flags);
956 ssize_t ll_getxattr(struct dentry *dentry, const char *name,
957 void *buffer, size_t size);
958 ssize_t ll_listxattr(struct dentry *dentry, char *buffer, size_t size);
959 int ll_removexattr(struct dentry *dentry, const char *name);
961 /* llite/remote_perm.c */
962 extern cfs_mem_cache_t *ll_remote_perm_cachep;
963 extern cfs_mem_cache_t *ll_rmtperm_hash_cachep;
965 struct hlist_head *alloc_rmtperm_hash(void);
966 void free_rmtperm_hash(struct hlist_head *hash);
967 int ll_update_remote_perm(struct inode *inode, struct mdt_remote_perm *perm);
968 int lustre_check_remote_perm(struct inode *inode, int mask);
970 /* llite/llite_fid.c */
971 ino_t ll_fid_build_ino(struct ll_sb_info *sbi, struct lu_fid *fid);
972 __u32 ll_fid_build_gen(struct ll_sb_info *sbi, struct lu_fid *fid);
974 /* llite/llite_capa.c */
975 extern cfs_timer_t ll_capa_timer;
977 int ll_capa_thread_start(void);
978 void ll_capa_thread_stop(void);
979 void ll_capa_timer_callback(unsigned long unused);
981 struct obd_capa *ll_add_capa(struct inode *inode, struct obd_capa *ocapa);
982 int ll_update_capa(struct obd_capa *ocapa, struct lustre_capa *capa);
984 void ll_capa_open(struct inode *inode);
985 void ll_capa_close(struct inode *inode);
987 struct obd_capa *ll_mdscapa_get(struct inode *inode);
988 struct obd_capa *ll_osscapa_get(struct inode *inode, __u64 opc);
990 void ll_truncate_free_capa(struct obd_capa *ocapa);
991 void ll_clear_inode_capas(struct inode *inode);
992 void ll_print_capa_stat(struct ll_sb_info *sbi);
994 /* llite/llite_cl.c */
995 extern struct lu_device_type vvp_device_type;
998 * Common IO arguments for various VFS I/O interfaces.
1001 int cl_sb_init(struct super_block *sb);
1002 int cl_sb_fini(struct super_block *sb);
1003 int cl_inode_init(struct inode *inode, struct lustre_md *md);
1004 void cl_inode_fini(struct inode *inode);
1006 enum cl_lock_mode vvp_mode_from_vma(struct vm_area_struct *vma);
1007 void ll_io_init(struct cl_io *io, const struct file *file, int write);
1009 void ras_update(struct ll_sb_info *sbi, struct inode *inode,
1010 struct ll_readahead_state *ras, unsigned long index,
1012 void ll_ra_count_put(struct ll_sb_info *sbi, unsigned long len);
1013 int ll_is_file_contended(struct file *file);
1014 void ll_ra_stats_inc(struct address_space *mapping, enum ra_stat which);
1016 /* llite/llite_rmtacl.c */
1017 #ifdef CONFIG_FS_POSIX_ACL
1018 obd_valid rce_ops2valid(int ops);
1019 struct rmtacl_ctl_entry *rct_search(struct rmtacl_ctl_table *rct, pid_t key);
1020 int rct_add(struct rmtacl_ctl_table *rct, pid_t key, int ops);
1021 int rct_del(struct rmtacl_ctl_table *rct, pid_t key);
1022 void rct_init(struct rmtacl_ctl_table *rct);
1023 void rct_fini(struct rmtacl_ctl_table *rct);
1025 void ee_free(struct eacl_entry *ee);
1026 int ee_add(struct eacl_table *et, pid_t key, struct lu_fid *fid, int type,
1027 ext_acl_xattr_header *header);
1028 struct eacl_entry *et_search_del(struct eacl_table *et, pid_t key,
1029 struct lu_fid *fid, int type);
1030 void et_search_free(struct eacl_table *et, pid_t key);
1031 void et_init(struct eacl_table *et);
1032 void et_fini(struct eacl_table *et);
1037 #define LL_SA_RPC_MIN 2
1038 #define LL_SA_RPC_DEF 32
1039 #define LL_SA_RPC_MAX 8192
1041 /* per inode struct, for dir only */
1042 struct ll_statahead_info {
1043 struct inode *sai_inode;
1044 unsigned int sai_generation; /* generation for statahead */
1045 atomic_t sai_refcount; /* when access this struct, hold
1047 unsigned int sai_sent; /* stat requests sent count */
1048 unsigned int sai_replied; /* stat requests which received
1050 unsigned int sai_max; /* max ahead of lookup */
1051 unsigned int sai_index; /* index of statahead entry */
1052 unsigned int sai_index_next; /* index for the next statahead
1053 * entry to be stated */
1054 unsigned int sai_hit; /* hit count */
1055 unsigned int sai_miss; /* miss count:
1056 * for "ls -al" case, it includes
1057 * hidden dentry miss;
1058 * for "ls -l" case, it does not
1059 * include hidden dentry miss.
1060 * "sai_miss_hidden" is used for
1063 unsigned int sai_consecutive_miss; /* consecutive miss */
1064 unsigned int sai_miss_hidden;/* "ls -al", but first dentry
1065 * is not a hidden one */
1066 unsigned int sai_skip_hidden;/* skipped hidden dentry count */
1067 unsigned int sai_ls_all:1; /* "ls -al", do stat-ahead for
1069 cfs_waitq_t sai_waitq; /* stat-ahead wait queue */
1070 struct ptlrpc_thread sai_thread; /* stat-ahead thread */
1071 struct list_head sai_entries_sent; /* entries sent out */
1072 struct list_head sai_entries_received; /* entries returned */
1073 struct list_head sai_entries_stated; /* entries stated */
1076 int do_statahead_enter(struct inode *dir, struct dentry **dentry, int lookup);
1077 void ll_statahead_exit(struct dentry *dentry, int result);
1078 void ll_stop_statahead(struct inode *inode, void *key);
1081 void ll_statahead_mark(struct dentry *dentry)
1083 struct ll_inode_info *lli = ll_i2info(dentry->d_parent->d_inode);
1084 struct ll_dentry_data *ldd = ll_d2d(dentry);
1086 /* not the same process, don't mark */
1087 if (lli->lli_opendir_pid != cfs_curproc_pid())
1090 spin_lock(&lli->lli_lock);
1091 if (likely(lli->lli_sai != NULL && ldd != NULL))
1092 ldd->lld_sa_generation = lli->lli_sai->sai_generation;
1093 spin_unlock(&lli->lli_lock);
1097 int ll_statahead_enter(struct inode *dir, struct dentry **dentryp, int lookup)
1099 struct ll_sb_info *sbi = ll_i2sbi(dir);
1100 struct ll_inode_info *lli = ll_i2info(dir);
1101 struct ll_dentry_data *ldd = ll_d2d(*dentryp);
1103 if (sbi->ll_sa_max == 0)
1106 /* not the same process, don't statahead */
1107 if (lli->lli_opendir_pid != cfs_curproc_pid())
1111 * When "ls" a dentry, the system trigger more than once "revalidate" or
1112 * "lookup", for "getattr", for "getxattr", and maybe for others.
1113 * Under patchless client mode, the operation intent is not accurate,
1114 * it maybe misguide the statahead thread. For example:
1115 * The "revalidate" call for "getattr" and "getxattr" of a dentry maybe
1116 * have the same operation intent -- "IT_GETATTR".
1117 * In fact, one dentry should has only one chance to interact with the
1118 * statahead thread, otherwise the statahead windows will be confused.
1119 * The solution is as following:
1120 * Assign "lld_sa_generation" with "sai_generation" when a dentry
1121 * "IT_GETATTR" for the first time, and the subsequent "IT_GETATTR"
1122 * will bypass interacting with statahead thread for checking:
1123 * "lld_sa_generation == lli_sai->sai_generation"
1125 if (ldd && lli->lli_sai &&
1126 ldd->lld_sa_generation == lli->lli_sai->sai_generation)
1129 return do_statahead_enter(dir, dentryp, lookup);
1132 static void inline ll_dops_init(struct dentry *de, int block)
1134 struct ll_dentry_data *lld = ll_d2d(de);
1136 if (lld == NULL && block != 0) {
1142 lld->lld_sa_generation = 0;
1144 de->d_op = &ll_d_ops;
1147 /* llite ioctl register support rountine */
1154 #define LLIOC_MAX_CMD 256
1157 * Rules to write a callback function:
1160 * @magic: Dynamic ioctl call routine will feed this vaule with the pointer
1161 * returned to ll_iocontrol_register. Callback functions should use this
1162 * data to check the potential collasion of ioctl cmd. If collasion is
1163 * found, callback function should return LLIOC_CONT.
1164 * @rcp: The result of ioctl command.
1167 * If @magic matches the pointer returned by ll_iocontrol_data, the
1168 * callback should return LLIOC_STOP; return LLIOC_STOP otherwise.
1170 typedef enum llioc_iter (*llioc_callback_t)(struct inode *inode,
1171 struct file *file, unsigned int cmd, unsigned long arg,
1172 void *magic, int *rcp);
1174 enum llioc_iter ll_iocontrol_call(struct inode *inode, struct file *file,
1175 unsigned int cmd, unsigned long arg, int *rcp);
1177 /* export functions */
1178 /* Register ioctl block dynamatically for a regular file.
1180 * @cmd: the array of ioctl command set
1181 * @count: number of commands in the @cmd
1182 * @cb: callback function, it will be called if an ioctl command is found to
1183 * belong to the command list @cmd.
1186 * A magic pointer will be returned if success;
1187 * otherwise, NULL will be returned.
1189 void *ll_iocontrol_register(llioc_callback_t cb, int count, unsigned int *cmd);
1190 void ll_iocontrol_unregister(void *magic);
1194 /* lclient compat stuff */
1195 #define cl_inode_info ll_inode_info
1196 #define cl_i2info(info) ll_i2info(info)
1197 #define cl_inode_mode(inode) ((inode)->i_mode)
1198 #define cl_i2sbi ll_i2sbi
1199 #define cl_isize_read(inode) i_size_read(inode)
1200 #define cl_isize_write(inode,kms) i_size_write(inode, kms)
1201 #define cl_isize_write_nolock(inode,kms) do {(inode)->i_size=(kms);}while(0)
1203 static inline void cl_isize_lock(struct inode *inode, int lsmlock)
1205 ll_inode_size_lock(inode, lsmlock);
1208 static inline void cl_isize_unlock(struct inode *inode, int lsmlock)
1210 ll_inode_size_unlock(inode, lsmlock);
1213 static inline int cl_merge_lvb(struct inode *inode)
1215 return ll_merge_lvb(inode);
1218 #define cl_inode_atime(inode) LTIME_S((inode)->i_atime)
1219 #define cl_inode_ctime(inode) LTIME_S((inode)->i_ctime)
1220 #define cl_inode_mtime(inode) LTIME_S((inode)->i_mtime)
1222 struct obd_capa *cl_capa_lookup(struct inode *inode, enum cl_req_type crt);
1224 /** direct write pages */
1225 struct ll_dio_pages {
1226 /** page array to be written. we don't support
1227 * partial pages except the last one. */
1228 struct page **ldp_pages;
1229 /* offset of each page */
1230 loff_t *ldp_offsets;
1231 /** if ldp_offsets is NULL, it means a sequential
1232 * pages to be written, then this is the file offset
1233 * of the * first page. */
1234 loff_t ldp_start_offset;
1235 /** how many bytes are to be written. */
1237 /** # of pages in the array. */
1241 extern ssize_t ll_direct_rw_pages(const struct lu_env *env, struct cl_io *io,
1242 int rw, struct inode *inode,
1243 struct ll_dio_pages *pv);
1245 #endif /* LLITE_INTERNAL_H */