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 #ifndef DCACHE_LUSTRE_INVALID
56 #define DCACHE_LUSTRE_INVALID 0x100
59 #define LL_IT2STR(it) ((it) ? ldlm_it2str((it)->it_op) : "0")
60 #define LUSTRE_FPRIVATE(file) ((file)->private_data)
62 #ifdef HAVE_VFS_INTENT_PATCHES
63 static inline struct lookup_intent *ll_nd2it(struct nameidata *nd)
69 struct ll_dentry_data {
72 struct obd_client_handle lld_cwd_och;
73 struct obd_client_handle lld_mnt_och;
74 #ifndef HAVE_VFS_INTENT_PATCHES
75 struct lookup_intent *lld_it;
77 unsigned int lld_sa_generation;
80 #define ll_d2d(de) ((struct ll_dentry_data*)((de)->d_fsdata))
82 extern struct file_operations ll_pgcache_seq_fops;
84 #define LLI_INODE_MAGIC 0x111d0de5
85 #define LLI_INODE_DEAD 0xdeadd00d
87 /* remote client permission cache */
88 #define REMOTE_PERM_HASHSIZE 16
90 /* llite setxid/access permission for user on remote client */
91 struct ll_remote_perm {
92 struct hlist_node lrp_list;
97 int lrp_access_perm; /* MAY_READ/WRITE/EXEC, this
98 is access permission with
99 lrp_fsuid/lrp_fsgid. */
103 /* MDS has an authority for the Size-on-MDS attributes. */
104 LLIF_MDS_SIZE_LOCK = (1 << 0),
105 /* Epoch close is postponed. */
106 LLIF_EPOCH_PENDING = (1 << 1),
107 /* DONE WRITING is allowed. */
108 LLIF_DONE_WRITING = (1 << 2),
109 /* Sizeon-on-MDS attributes are changed. An attribute update needs to
111 LLIF_SOM_DIRTY = (1 << 3),
112 /* File is contented */
113 LLIF_CONTENDED = (1 << 4),
114 /* Truncate uses server lock for this file */
115 LLIF_SRVLOCK = (1 << 5)
119 struct ll_inode_info {
121 struct semaphore lli_size_sem; /* protect open and change size */
122 void *lli_size_sem_owner;
123 struct semaphore lli_write_sem;
124 char *lli_symlink_name;
127 unsigned long lli_flags;
128 cfs_time_t lli_contention_time;
130 /* this lock protects posix_acl, pending_write_llaps, mmap_cnt */
132 struct list_head lli_close_list;
133 /* handle is to be sent to MDS later on done_writing and setattr.
134 * Open handle data are needed for the recovery to reconstruct
135 * the inode state on the MDS. XXX: recovery is not ready yet. */
136 struct obd_client_handle *lli_pending_och;
138 /* for writepage() only to communicate to fsync */
141 struct posix_acl *lli_posix_acl;
143 /* remote permission hash */
144 struct hlist_head *lli_remote_perms;
145 unsigned long lli_rmtperm_utime;
146 struct semaphore lli_rmtperm_sem;
148 struct list_head lli_dead_list;
150 struct semaphore lli_och_sem; /* Protects access to och pointers
151 and their usage counters */
152 /* We need all three because every inode may be opened in different
154 struct obd_client_handle *lli_mds_read_och;
155 __u64 lli_open_fd_read_count;
156 struct obd_client_handle *lli_mds_write_och;
157 __u64 lli_open_fd_write_count;
158 struct obd_client_handle *lli_mds_exec_och;
159 __u64 lli_open_fd_exec_count;
161 struct inode lli_vfs_inode;
163 /* identifying fields for both metadata and data stacks. */
164 struct lu_fid lli_fid;
165 struct lov_stripe_md *lli_smd;
168 /* open count currently used by capability only, indicate whether
169 * capability needs renewal */
170 atomic_t lli_open_count;
171 struct obd_capa *lli_mds_capa;
172 struct list_head lli_oss_capas;
174 /* metadata stat-ahead */
176 * "opendir_pid" is the token when lookup/revalid -- I am the owner of
179 pid_t lli_opendir_pid;
181 * since parent-child threads can share the same @file struct,
182 * "opendir_key" is the token when dir close for case of parent exit
183 * before child -- it is me should cleanup the dir readahead. */
184 void *lli_opendir_key;
185 struct ll_statahead_info *lli_sai;
186 struct cl_object *lli_clob;
190 * Locking to guarantee consistency of non-atomic updates to long long i_size,
191 * consistency between file size and KMS, and consistency within
192 * ->lli_smd->lsm_oinfo[]'s.
194 * Implemented by ->lli_size_sem and ->lsm_sem, nested in that order.
197 void ll_inode_size_lock(struct inode *inode, int lock_lsm);
198 void ll_inode_size_unlock(struct inode *inode, int unlock_lsm);
200 // FIXME: replace the name of this with LL_I to conform to kernel stuff
201 // static inline struct ll_inode_info *LL_I(struct inode *inode)
202 static inline struct ll_inode_info *ll_i2info(struct inode *inode)
204 return container_of(inode, struct ll_inode_info, lli_vfs_inode);
207 /* default to about 40meg of readahead on a given system. That much tied
208 * up in 512k readahead requests serviced at 40ms each is about 1GB/s. */
209 #define SBI_DEFAULT_READAHEAD_MAX (40UL << (20 - CFS_PAGE_SHIFT))
211 /* default to read-ahead full files smaller than 2MB on the second read */
212 #define SBI_DEFAULT_READAHEAD_WHOLE_MAX (2UL << (20 - CFS_PAGE_SHIFT))
217 RA_STAT_DISTANT_READPAGE,
218 RA_STAT_MISS_IN_WINDOW,
219 RA_STAT_FAILED_GRAB_PAGE,
220 RA_STAT_FAILED_MATCH,
225 RA_STAT_MAX_IN_FLIGHT,
226 RA_STAT_WRONG_GRAB_PAGE,
231 atomic_t ra_cur_pages;
232 unsigned long ra_max_pages;
233 unsigned long ra_max_pages_per_file;
234 unsigned long ra_max_read_ahead_whole_pages;
237 /* ra_io_arg will be filled in the beginning of ll_readahead with
238 * ras_lock, then the following ll_read_ahead_pages will read RA
239 * pages according to this arg, all the items in this structure are
240 * counted by page index.
243 unsigned long ria_start; /* start offset of read-ahead*/
244 unsigned long ria_end; /* end offset of read-ahead*/
245 /* If stride read pattern is detected, ria_stoff means where
246 * stride read is started. Note: for normal read-ahead, the
247 * value here is meaningless, and also it will not be accessed*/
249 /* ria_length and ria_pages are the length and pages length in the
250 * stride I/O mode. And they will also be used to check whether
251 * it is stride I/O read-ahead in the read-ahead pages*/
252 unsigned long ria_length;
253 unsigned long ria_pages;
256 /* LL_HIST_MAX=32 causes an overflow */
257 #define LL_HIST_MAX 28
258 #define LL_HIST_START 12 /* buckets start at 2^12 = 4k */
259 #define LL_PROCESS_HIST_MAX 10
260 struct per_process_info {
262 struct obd_histogram pp_r_hist;
263 struct obd_histogram pp_w_hist;
266 /* pp_extents[LL_PROCESS_HIST_MAX] will hold the combined process info */
267 struct ll_rw_extents_info {
268 struct per_process_info pp_extents[LL_PROCESS_HIST_MAX + 1];
271 #define LL_OFFSET_HIST_MAX 100
272 struct ll_rw_process_info {
275 loff_t rw_range_start;
277 loff_t rw_last_file_pos;
279 size_t rw_smallest_extent;
280 size_t rw_largest_extent;
281 struct ll_file_data *rw_last_file;
284 enum stats_track_type {
285 STATS_TRACK_ALL = 0, /* track all processes */
286 STATS_TRACK_PID, /* track process with this pid */
287 STATS_TRACK_PPID, /* track processes with this ppid */
288 STATS_TRACK_GID, /* track processes with this gid */
292 /* flags for sbi->ll_flags */
293 #define LL_SBI_NOLCK 0x01 /* DLM locking disabled (directio-only) */
294 #define LL_SBI_CHECKSUM 0x02 /* checksum each page as it's written */
295 #define LL_SBI_FLOCK 0x04
296 #define LL_SBI_USER_XATTR 0x08 /* support user xattr */
297 #define LL_SBI_ACL 0x10 /* support ACL */
298 #define LL_SBI_JOIN 0x20 /* support JOIN */
299 #define LL_SBI_RMT_CLIENT 0x40 /* remote client */
300 #define LL_SBI_MDS_CAPA 0x80 /* support mds capa */
301 #define LL_SBI_OSS_CAPA 0x100 /* support oss capa */
302 #define LL_SBI_LOCALFLOCK 0x200 /* Local flocks support by kernel */
303 #define LL_SBI_LRU_RESIZE 0x400 /* lru resize support */
304 #define LL_SBI_LAZYSTATFS 0x800 /* lazystatfs mount option */
306 /* default value for ll_sb_info->contention_time */
307 #define SBI_DEFAULT_CONTENTION_SECONDS 60
308 /* default value for lockless_truncate_enable */
309 #define SBI_DEFAULT_LOCKLESS_TRUNCATE_ENABLE 1
310 #define RCE_HASHES 32
312 struct rmtacl_ctl_entry {
313 struct list_head rce_list;
314 pid_t rce_key; /* hash key */
315 int rce_ops; /* acl operation type */
318 struct rmtacl_ctl_table {
320 struct list_head rct_entries[RCE_HASHES];
326 struct list_head ee_list;
327 pid_t ee_key; /* hash key */
328 struct lu_fid ee_fid;
329 int ee_type; /* ACL type for ACCESS or DEFAULT */
330 ext_acl_xattr_header *ee_acl;
335 struct list_head et_entries[EE_HASHES];
339 struct list_head ll_list;
340 /* this protects pglist and ra_info. It isn't safe to
341 * grab from interrupt contexts */
343 spinlock_t ll_pp_extent_lock; /* Lock for pp_extent entries */
344 spinlock_t ll_process_lock; /* Lock for ll_rw_process_info */
345 struct obd_uuid ll_sb_uuid;
346 struct obd_export *ll_md_exp;
347 struct obd_export *ll_dt_exp;
348 struct proc_dir_entry* ll_proc_root;
349 struct lu_fid ll_root_fid; /* root object fid */
352 struct list_head ll_conn_chain; /* per-conn chain of SBs */
353 struct lustre_client_ocd ll_lco;
355 struct list_head ll_orphan_dentry_list; /*please don't ask -p*/
356 struct ll_close_queue *ll_lcq;
358 struct lprocfs_stats *ll_stats; /* lprocfs stats counter */
360 unsigned long ll_async_page_max;
361 unsigned long ll_async_page_count;
363 struct lprocfs_stats *ll_ra_stats;
365 struct ll_ra_info ll_ra_info;
366 unsigned int ll_namelen;
367 struct file_operations *ll_fop;
369 #ifdef HAVE_EXPORT___IGET
370 struct list_head ll_deathrow; /* inodes to be destroyed (b1443) */
371 spinlock_t ll_deathrow_lock;
373 /* =0 - hold lock over whole read/write
374 * >0 - max. chunk to be read/written w/o lock re-acquiring */
375 unsigned long ll_max_rw_chunk;
377 struct lu_site *ll_site;
378 struct cl_device *ll_cl;
380 struct ll_rw_extents_info ll_rw_extents_info;
381 int ll_extent_process_count;
382 struct ll_rw_process_info ll_rw_process_info[LL_PROCESS_HIST_MAX];
383 unsigned int ll_offset_process_count;
384 struct ll_rw_process_info ll_rw_offset_info[LL_OFFSET_HIST_MAX];
385 unsigned int ll_rw_offset_entry_count;
386 enum stats_track_type ll_stats_track_type;
387 int ll_stats_track_id;
390 /* metadata stat-ahead */
391 unsigned int ll_sa_max; /* max statahead RPCs */
392 unsigned int ll_sa_wrong; /* statahead thread stopped for
394 unsigned int ll_sa_total; /* statahead thread started
396 unsigned long long ll_sa_blocked; /* ls count waiting for
398 unsigned long long ll_sa_cached; /* ls count got in cache */
399 unsigned long long ll_sa_hit; /* hit count */
400 unsigned long long ll_sa_miss; /* miss count */
402 dev_t ll_sdev_orig; /* save s_dev before assign for
404 struct rmtacl_ctl_table ll_rct;
405 struct eacl_table ll_et;
408 #define LL_DEFAULT_MAX_RW_CHUNK (32 * 1024 * 1024)
413 struct task_struct *lrr_reader;
414 struct list_head lrr_linkage;
418 * per file-descriptor read-ahead data.
420 struct ll_readahead_state {
423 * index of the last page that read(2) needed and that wasn't in the
424 * cache. Used by ras_update() to detect seeks.
426 * XXX nikita: if access seeks into cached region, Lustre doesn't see
429 unsigned long ras_last_readpage;
431 * number of pages read after last read-ahead window reset. As window
432 * is reset on each seek, this is effectively a number of consecutive
433 * accesses. Maybe ->ras_accessed_in_window is better name.
435 * XXX nikita: window is also reset (by ras_update()) when Lustre
436 * believes that memory pressure evicts read-ahead pages. In that
437 * case, it probably doesn't make sense to expand window to
438 * PTLRPC_MAX_BRW_PAGES on the third access.
440 unsigned long ras_consecutive_pages;
442 * number of read requests after the last read-ahead window reset
443 * As window is reset on each seek, this is effectively the number
444 * on consecutive read request and is used to trigger read-ahead.
446 unsigned long ras_consecutive_requests;
448 * Parameters of current read-ahead window. Handled by
449 * ras_update(). On the initial access to the file or after a seek,
450 * window is reset to 0. After 3 consecutive accesses, window is
451 * expanded to PTLRPC_MAX_BRW_PAGES. Afterwards, window is enlarged by
452 * PTLRPC_MAX_BRW_PAGES chunks up to ->ra_max_pages.
454 unsigned long ras_window_start, ras_window_len;
456 * Where next read-ahead should start at. This lies within read-ahead
457 * window. Read-ahead window is read in pieces rather than at once
458 * because: 1. lustre limits total number of pages under read-ahead by
459 * ->ra_max_pages (see ll_ra_count_get()), 2. client cannot read pages
460 * not covered by DLM lock.
462 unsigned long ras_next_readahead;
464 * Total number of ll_file_read requests issued, reads originating
465 * due to mmap are not counted in this total. This value is used to
466 * trigger full file read-ahead after multiple reads to a small file.
468 unsigned long ras_requests;
470 * Page index with respect to the current request, these value
471 * will not be accurate when dealing with reads issued via mmap.
473 unsigned long ras_request_index;
475 * list of struct ll_ra_read's one per read(2) call current in
476 * progress against this file descriptor. Used by read-ahead code,
477 * protected by ->ras_lock.
479 struct list_head ras_read_beads;
481 * The following 3 items are used for detecting the stride I/O
483 * In stride I/O mode,
484 * ...............|-----data-----|****gap*****|--------|******|....
485 * offset |-stride_pages-|-stride_gap-|
486 * ras_stride_offset = offset;
487 * ras_stride_length = stride_pages + stride_gap;
488 * ras_stride_pages = stride_pages;
489 * Note: all these three items are counted by pages.
491 unsigned long ras_stride_length;
492 unsigned long ras_stride_pages;
493 pgoff_t ras_stride_offset;
495 * number of consecutive stride request count, and it is similar as
496 * ras_consecutive_requests, but used for stride I/O mode.
497 * Note: only more than 2 consecutive stride request are detected,
498 * stride read-ahead will be enable
500 unsigned long ras_consecutive_stride_requests;
506 extern cfs_mem_cache_t *ll_file_data_slab;
507 struct lustre_handle;
508 struct ll_file_data {
509 struct ll_readahead_state fd_ras;
511 struct ccc_grouplock fd_grouplock;
512 struct ll_file_dir fd_dir;
514 struct file *fd_file;
517 struct lov_stripe_md;
519 extern spinlock_t inode_lock;
521 extern struct proc_dir_entry *proc_lustre_fs_root;
523 static inline struct inode *ll_info2i(struct ll_inode_info *lli)
525 return &lli->lli_vfs_inode;
529 struct inode *icbd_parent;
530 struct dentry **icbd_childp;
534 __u32 ll_i2suppgid(struct inode *i);
535 void ll_i2gids(__u32 *suppgids, struct inode *i1,struct inode *i2);
537 #define LLAP_MAGIC 98764321
539 extern cfs_mem_cache_t *ll_async_page_slab;
540 extern size_t ll_async_page_slab_size;
542 void ll_ra_read_in(struct file *f, struct ll_ra_read *rar);
543 void ll_ra_read_ex(struct file *f, struct ll_ra_read *rar);
544 struct ll_ra_read *ll_ra_read_get(struct file *f);
546 /* llite/lproc_llite.c */
548 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
549 struct super_block *sb, char *osc, char *mdc);
550 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi);
551 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count);
552 void lprocfs_llite_init_vars(struct lprocfs_static_vars *lvars);
554 static inline int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
555 struct super_block *sb, char *osc, char *mdc){return 0;}
556 static inline void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi) {}
557 static void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count) {}
558 static void lprocfs_llite_init_vars(struct lprocfs_static_vars *lvars)
560 memset(lvars, 0, sizeof(*lvars));
566 static inline void ll_put_page(struct page *page)
569 page_cache_release(page);
572 extern struct file_operations ll_dir_operations;
573 extern struct inode_operations ll_dir_inode_operations;
574 struct page *ll_get_dir_page(struct inode *dir, __u64 hash, int exact,
575 struct ll_dir_chain *chain);
577 int ll_objects_destroy(struct ptlrpc_request *request,
579 struct inode *ll_iget(struct super_block *sb, ino_t hash,
580 struct lustre_md *lic);
581 int ll_md_blocking_ast(struct ldlm_lock *, struct ldlm_lock_desc *,
582 void *data, int flag);
583 #ifndef HAVE_VFS_INTENT_PATCHES
584 struct lookup_intent *ll_convert_intent(struct open_intent *oit,
587 int ll_lookup_it_finish(struct ptlrpc_request *request,
588 struct lookup_intent *it, void *data);
589 void ll_lookup_finish_locks(struct lookup_intent *it, struct dentry *dentry);
592 int ll_prepare_write(struct file *, struct page *, unsigned from, unsigned to);
593 int ll_commit_write(struct file *, struct page *, unsigned from, unsigned to);
594 int ll_writepage(struct page *page, struct writeback_control *wbc);
595 void ll_removepage(struct page *page);
596 int ll_readpage(struct file *file, struct page *page);
597 void ll_readahead_init(struct inode *inode, struct ll_readahead_state *ras);
598 void ll_truncate(struct inode *inode);
599 int ll_file_punch(struct inode *, loff_t, int);
600 ssize_t ll_file_lockless_io(struct file *, char *, size_t, loff_t *, int);
601 void ll_clear_file_contended(struct inode*);
602 int ll_sync_page_range(struct inode *, struct address_space *, loff_t, size_t);
603 int ll_readahead(const struct lu_env *env, struct cl_io *io, struct ll_readahead_state *ras,
604 struct address_space *mapping, struct cl_page_list *queue, int flags);
607 extern struct file_operations ll_file_operations;
608 extern struct file_operations ll_file_operations_flock;
609 extern struct file_operations ll_file_operations_noflock;
610 extern struct inode_operations ll_file_inode_operations;
611 extern int ll_inode_revalidate_it(struct dentry *, struct lookup_intent *);
612 extern int ll_have_md_lock(struct inode *inode, __u64 bits);
613 extern ldlm_mode_t ll_take_md_lock(struct inode *inode, __u64 bits,
614 struct lustre_handle *lockh);
615 int __ll_inode_revalidate_it(struct dentry *, struct lookup_intent *, __u64 bits);
616 int ll_revalidate_nd(struct dentry *dentry, struct nameidata *nd);
617 int ll_file_open(struct inode *inode, struct file *file);
618 int ll_file_release(struct inode *inode, struct file *file);
619 int ll_glimpse_ioctl(struct ll_sb_info *sbi,
620 struct lov_stripe_md *lsm, lstat_t *st);
621 void ll_ioepoch_open(struct ll_inode_info *lli, __u64 ioepoch);
622 int ll_local_open(struct file *file,
623 struct lookup_intent *it, struct ll_file_data *fd,
624 struct obd_client_handle *och);
625 int ll_release_openhandle(struct dentry *, struct lookup_intent *);
626 int ll_md_close(struct obd_export *md_exp, struct inode *inode,
628 int ll_md_real_close(struct inode *inode, int flags);
629 void ll_epoch_close(struct inode *inode, struct md_op_data *op_data,
630 struct obd_client_handle **och, unsigned long flags);
631 int ll_sizeonmds_update(struct inode *inode, struct lustre_handle *fh,
633 int ll_inode_getattr(struct inode *inode, struct obdo *obdo);
634 int ll_md_setattr(struct inode *inode, struct md_op_data *op_data,
635 struct md_open_data **mod);
636 void ll_pack_inode2opdata(struct inode *inode, struct md_op_data *op_data,
637 struct lustre_handle *fh);
638 extern void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
639 struct ll_file_data *file, loff_t pos,
640 size_t count, int rw);
641 int ll_getattr_it(struct vfsmount *mnt, struct dentry *de,
642 struct lookup_intent *it, struct kstat *stat);
643 int ll_getattr(struct vfsmount *mnt, struct dentry *de, struct kstat *stat);
644 struct ll_file_data *ll_file_data_get(void);
645 #ifndef HAVE_INODE_PERMISION_2ARGS
646 int ll_inode_permission(struct inode *inode, int mask, struct nameidata *nd);
648 int ll_inode_permission(struct inode *inode, int mask);
650 int ll_lov_setstripe_ea_info(struct inode *inode, struct file *file,
651 int flags, struct lov_user_md *lum,
653 int ll_lov_getstripe_ea_info(struct inode *inode, const char *filename,
654 struct lov_mds_md **lmm, int *lmm_size,
655 struct ptlrpc_request **request);
656 int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump,
658 int ll_dir_getstripe(struct inode *inode, struct lov_mds_md **lmm,
659 int *lmm_size, struct ptlrpc_request **request);
660 int ll_fsync(struct file *file, struct dentry *dentry, int data);
661 int ll_fiemap(struct inode *inode, struct ll_user_fiemap *fiemap,
663 int ll_merge_lvb(struct inode *inode);
664 int ll_get_grouplock(struct inode *inode, struct file *file, unsigned long arg);
665 int ll_put_grouplock(struct inode *inode, struct file *file, unsigned long arg);
666 int ll_fid2path(struct obd_export *exp, void *arg);
671 * protect race ll_find_aliases vs ll_revalidate_it vs ll_unhash_aliases
673 extern spinlock_t ll_lookup_lock;
674 extern struct dentry_operations ll_d_ops;
675 void ll_intent_drop_lock(struct lookup_intent *);
676 void ll_intent_release(struct lookup_intent *);
677 int ll_drop_dentry(struct dentry *dentry);
678 extern void ll_set_dd(struct dentry *de);
679 int ll_drop_dentry(struct dentry *dentry);
680 void ll_unhash_aliases(struct inode *);
681 void ll_frob_intent(struct lookup_intent **itp, struct lookup_intent *deft);
682 void ll_lookup_finish_locks(struct lookup_intent *it, struct dentry *dentry);
683 int ll_dcompare(struct dentry *parent, struct qstr *d_name, struct qstr *name);
684 int ll_revalidate_it_finish(struct ptlrpc_request *request,
685 struct lookup_intent *it, struct dentry *de);
687 /* llite/llite_lib.c */
688 extern struct super_operations lustre_super_operations;
690 char *ll_read_opt(const char *opt, char *data);
691 void ll_lli_init(struct ll_inode_info *lli);
692 int ll_fill_super(struct super_block *sb);
693 void ll_put_super(struct super_block *sb);
694 void ll_kill_super(struct super_block *sb);
695 int ll_shrink_cache(int nr_to_scan, gfp_t gfp_mask);
696 struct inode *ll_inode_from_lock(struct ldlm_lock *lock);
697 void ll_clear_inode(struct inode *inode);
698 int ll_setattr_raw(struct inode *inode, struct iattr *attr);
699 int ll_setattr(struct dentry *de, struct iattr *attr);
700 #ifndef HAVE_STATFS_DENTRY_PARAM
701 int ll_statfs(struct super_block *sb, struct kstatfs *sfs);
703 int ll_statfs(struct dentry *de, struct kstatfs *sfs);
705 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
706 __u64 max_age, __u32 flags);
707 void ll_update_inode(struct inode *inode, struct lustre_md *md);
708 void ll_read_inode2(struct inode *inode, void *opaque);
709 void ll_delete_inode(struct inode *inode);
710 int ll_iocontrol(struct inode *inode, struct file *file,
711 unsigned int cmd, unsigned long arg);
712 int ll_flush_ctx(struct inode *inode);
713 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
714 void ll_umount_begin(struct vfsmount *vfsmnt, int flags);
716 void ll_umount_begin(struct super_block *sb);
718 int ll_remount_fs(struct super_block *sb, int *flags, char *data);
719 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs);
720 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
721 struct super_block *);
722 void lustre_dump_dentry(struct dentry *, int recur);
723 void lustre_dump_inode(struct inode *);
724 int ll_obd_statfs(struct inode *inode, void *arg);
725 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *max_mdsize);
726 int ll_process_config(struct lustre_cfg *lcfg);
727 struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
728 struct inode *i1, struct inode *i2,
729 const char *name, int namelen,
730 int mode, __u32 opc, void *data);
731 void ll_finish_md_op_data(struct md_op_data *op_data);
733 /* llite/llite_nfs.c */
734 extern struct export_operations lustre_export_operations;
735 __u32 get_uuid2int(const char *name, int len);
737 /* llite/special.c */
738 extern struct inode_operations ll_special_inode_operations;
739 extern struct file_operations ll_special_chr_inode_fops;
740 extern struct file_operations ll_special_chr_file_fops;
741 extern struct file_operations ll_special_blk_inode_fops;
742 extern struct file_operations ll_special_fifo_inode_fops;
743 extern struct file_operations ll_special_fifo_file_fops;
744 extern struct file_operations ll_special_sock_inode_fops;
746 /* llite/symlink.c */
747 extern struct inode_operations ll_fast_symlink_inode_operations;
749 /* llite/llite_close.c */
750 struct ll_close_queue {
752 struct list_head lcq_head;
753 wait_queue_head_t lcq_waitq;
754 struct completion lcq_comp;
758 struct ccc_object *cl_inode2ccc(struct inode *inode);
761 void vvp_write_pending (struct ccc_object *club, struct ccc_page *page);
762 void vvp_write_complete(struct ccc_object *club, struct ccc_page *page);
764 /* specific achitecture can implement only part of this list */
765 enum vvp_io_subtype {
768 /** io called from .sendfile */
770 /** io started from splice_{read|write} */
777 enum vvp_io_subtype cui_io_subtype;
781 read_actor_t cui_actor;
785 struct pipe_inode_info *cui_pipe;
786 unsigned int cui_flags;
788 struct vvp_fault_io {
790 * Inode modification time that is checked across DLM
794 struct vm_area_struct *ft_vma;
796 * locked page returned from vvp_io
798 cfs_page_t *ft_vmpage;
799 #ifndef HAVE_VM_OP_FAULT
800 struct vm_nopage_api {
802 * Virtual address at which fault occurred.
804 unsigned long ft_address;
806 * Fault type, as to be supplied to
812 struct vm_fault_api {
816 struct vm_fault *ft_vmf;
818 * fault API used bitflags for return code.
820 unsigned int ft_flags;
826 * Read-ahead state used by read and page-fault IO contexts.
828 struct ll_ra_read cui_bead;
830 * Set when cui_bead has been initialized.
832 int cui_ra_window_set;
834 * If IO was created directly in low level method like
835 * ->prepare_write(), this field stores the number of method calls
836 * that constitute this IO. This field is decremented by ll_cl_fini(),
837 * and cl_io is destroyed, when it reaches 0. When oneshot IO
838 * completes, this fields is set to -1.
843 * Partially truncated page, that vvp_io_trunc_start() keeps locked
846 struct cl_page *cui_partpage;
850 * IO arguments for various VFS I/O interfaces.
853 /** normal/sendfile/splice */
854 enum vvp_io_subtype via_io_subtype;
858 #ifndef HAVE_FILE_WRITEV
859 struct kiocb *via_iocb;
861 struct iovec *via_iov;
862 unsigned long via_nrsegs;
865 read_actor_t via_actor;
869 struct pipe_inode_info *via_pipe;
870 unsigned int via_flags;
875 struct vvp_thread_info {
876 struct ost_lvb vti_lvb;
877 struct cl_2queue vti_queue;
878 struct iovec vti_local_iov;
879 struct vvp_io_args vti_args;
880 struct ra_io_arg vti_ria;
881 struct kiocb vti_kiocb;
884 static inline struct vvp_thread_info *vvp_env_info(const struct lu_env *env)
886 extern struct lu_context_key vvp_key;
887 struct vvp_thread_info *info;
889 info = lu_context_key_get(&env->le_ctx, &vvp_key);
890 LASSERT(info != NULL);
894 static inline struct vvp_io_args *vvp_env_args(const struct lu_env *env,
895 enum vvp_io_subtype type)
897 struct vvp_io_args *ret = &vvp_env_info(env)->vti_args;
899 ret->via_io_subtype = type;
905 struct vvp_io vs_ios;
908 static inline struct vvp_session *vvp_env_session(const struct lu_env *env)
910 extern struct lu_context_key vvp_session_key;
911 struct vvp_session *ses;
913 ses = lu_context_key_get(env->le_ses, &vvp_session_key);
914 LASSERT(ses != NULL);
918 static inline struct vvp_io *vvp_env_io(const struct lu_env *env)
920 return &vvp_env_session(env)->vs_ios;
923 void ll_queue_done_writing(struct inode *inode, unsigned long flags);
924 void ll_close_thread_shutdown(struct ll_close_queue *lcq);
925 int ll_close_thread_start(struct ll_close_queue **lcq_ret);
927 /* llite/llite_mmap.c */
928 typedef struct rb_root rb_root_t;
929 typedef struct rb_node rb_node_t;
931 struct ll_lock_tree_node;
932 struct ll_lock_tree {
934 struct list_head lt_locked_list;
935 struct ll_file_data *lt_fd;
938 int ll_teardown_mmaps(struct address_space *mapping, __u64 first, __u64 last);
939 int ll_file_mmap(struct file * file, struct vm_area_struct * vma);
940 struct ll_lock_tree_node * ll_node_from_inode(struct inode *inode, __u64 start,
941 __u64 end, ldlm_mode_t mode);
942 void policy_from_vma(ldlm_policy_data_t *policy,
943 struct vm_area_struct *vma, unsigned long addr, size_t count);
944 struct vm_area_struct *our_vma(unsigned long addr, size_t count);
946 #define ll_s2sbi(sb) (s2lsi(sb)->lsi_llsbi)
948 static inline __u64 ll_ts2u64(struct timespec *time)
950 __u64 t = time->tv_sec;
954 /* don't need an addref as the sb_info should be holding one */
955 static inline struct obd_export *ll_s2dtexp(struct super_block *sb)
957 return ll_s2sbi(sb)->ll_dt_exp;
960 /* don't need an addref as the sb_info should be holding one */
961 static inline struct obd_export *ll_s2mdexp(struct super_block *sb)
963 return ll_s2sbi(sb)->ll_md_exp;
966 static inline struct client_obd *sbi2mdc(struct ll_sb_info *sbi)
968 struct obd_device *obd = sbi->ll_md_exp->exp_obd;
974 // FIXME: replace the name of this with LL_SB to conform to kernel stuff
975 static inline struct ll_sb_info *ll_i2sbi(struct inode *inode)
977 return ll_s2sbi(inode->i_sb);
980 static inline struct obd_export *ll_i2dtexp(struct inode *inode)
982 return ll_s2dtexp(inode->i_sb);
985 static inline struct obd_export *ll_i2mdexp(struct inode *inode)
987 return ll_s2mdexp(inode->i_sb);
990 static inline struct lu_fid *ll_inode2fid(struct inode *inode)
993 LASSERT(inode != NULL);
994 fid = &ll_i2info(inode)->lli_fid;
995 LASSERT(fid_is_igif(fid) || fid_ver(fid) == 0);
999 static inline int ll_mds_max_easize(struct super_block *sb)
1001 return sbi2mdc(ll_s2sbi(sb))->cl_max_mds_easize;
1004 static inline __u64 ll_file_maxbytes(struct inode *inode)
1006 return ll_i2info(inode)->lli_maxbytes;
1010 int ll_setxattr(struct dentry *dentry, const char *name,
1011 const void *value, size_t size, int flags);
1012 ssize_t ll_getxattr(struct dentry *dentry, const char *name,
1013 void *buffer, size_t size);
1014 ssize_t ll_listxattr(struct dentry *dentry, char *buffer, size_t size);
1015 int ll_removexattr(struct dentry *dentry, const char *name);
1017 /* llite/remote_perm.c */
1018 extern cfs_mem_cache_t *ll_remote_perm_cachep;
1019 extern cfs_mem_cache_t *ll_rmtperm_hash_cachep;
1021 struct hlist_head *alloc_rmtperm_hash(void);
1022 void free_rmtperm_hash(struct hlist_head *hash);
1023 int ll_update_remote_perm(struct inode *inode, struct mdt_remote_perm *perm);
1024 int lustre_check_remote_perm(struct inode *inode, int mask);
1026 /* llite/llite_capa.c */
1027 extern cfs_timer_t ll_capa_timer;
1029 int ll_capa_thread_start(void);
1030 void ll_capa_thread_stop(void);
1031 void ll_capa_timer_callback(unsigned long unused);
1033 struct obd_capa *ll_add_capa(struct inode *inode, struct obd_capa *ocapa);
1034 int ll_update_capa(struct obd_capa *ocapa, struct lustre_capa *capa);
1036 void ll_capa_open(struct inode *inode);
1037 void ll_capa_close(struct inode *inode);
1039 struct obd_capa *ll_mdscapa_get(struct inode *inode);
1040 struct obd_capa *ll_osscapa_get(struct inode *inode, __u64 opc);
1042 void ll_truncate_free_capa(struct obd_capa *ocapa);
1043 void ll_clear_inode_capas(struct inode *inode);
1044 void ll_print_capa_stat(struct ll_sb_info *sbi);
1046 /* llite/llite_cl.c */
1047 extern struct lu_device_type vvp_device_type;
1050 * Common IO arguments for various VFS I/O interfaces.
1053 int cl_sb_init(struct super_block *sb);
1054 int cl_sb_fini(struct super_block *sb);
1055 int cl_inode_init(struct inode *inode, struct lustre_md *md);
1056 void cl_inode_fini(struct inode *inode);
1058 enum cl_lock_mode vvp_mode_from_vma(struct vm_area_struct *vma);
1059 void ll_io_init(struct cl_io *io, const struct file *file, int write);
1061 void ras_update(struct ll_sb_info *sbi, struct inode *inode,
1062 struct ll_readahead_state *ras, unsigned long index,
1064 void ll_ra_count_put(struct ll_sb_info *sbi, unsigned long len);
1065 int ll_is_file_contended(struct file *file);
1066 void ll_ra_stats_inc(struct address_space *mapping, enum ra_stat which);
1068 /* llite/llite_rmtacl.c */
1069 #ifdef CONFIG_FS_POSIX_ACL
1070 obd_valid rce_ops2valid(int ops);
1071 struct rmtacl_ctl_entry *rct_search(struct rmtacl_ctl_table *rct, pid_t key);
1072 int rct_add(struct rmtacl_ctl_table *rct, pid_t key, int ops);
1073 int rct_del(struct rmtacl_ctl_table *rct, pid_t key);
1074 void rct_init(struct rmtacl_ctl_table *rct);
1075 void rct_fini(struct rmtacl_ctl_table *rct);
1077 void ee_free(struct eacl_entry *ee);
1078 int ee_add(struct eacl_table *et, pid_t key, struct lu_fid *fid, int type,
1079 ext_acl_xattr_header *header);
1080 struct eacl_entry *et_search_del(struct eacl_table *et, pid_t key,
1081 struct lu_fid *fid, int type);
1082 void et_search_free(struct eacl_table *et, pid_t key);
1083 void et_init(struct eacl_table *et);
1084 void et_fini(struct eacl_table *et);
1089 #define LL_SA_RPC_MIN 2
1090 #define LL_SA_RPC_DEF 32
1091 #define LL_SA_RPC_MAX 8192
1093 /* per inode struct, for dir only */
1094 struct ll_statahead_info {
1095 struct inode *sai_inode;
1096 unsigned int sai_generation; /* generation for statahead */
1097 atomic_t sai_refcount; /* when access this struct, hold
1099 unsigned int sai_sent; /* stat requests sent count */
1100 unsigned int sai_replied; /* stat requests which received
1102 unsigned int sai_max; /* max ahead of lookup */
1103 unsigned int sai_index; /* index of statahead entry */
1104 unsigned int sai_index_next; /* index for the next statahead
1105 * entry to be stated */
1106 unsigned int sai_hit; /* hit count */
1107 unsigned int sai_miss; /* miss count:
1108 * for "ls -al" case, it includes
1109 * hidden dentry miss;
1110 * for "ls -l" case, it does not
1111 * include hidden dentry miss.
1112 * "sai_miss_hidden" is used for
1115 unsigned int sai_consecutive_miss; /* consecutive miss */
1116 unsigned int sai_miss_hidden;/* "ls -al", but first dentry
1117 * is not a hidden one */
1118 unsigned int sai_skip_hidden;/* skipped hidden dentry count */
1119 unsigned int sai_ls_all:1; /* "ls -al", do stat-ahead for
1121 cfs_waitq_t sai_waitq; /* stat-ahead wait queue */
1122 struct ptlrpc_thread sai_thread; /* stat-ahead thread */
1123 struct list_head sai_entries_sent; /* entries sent out */
1124 struct list_head sai_entries_received; /* entries returned */
1125 struct list_head sai_entries_stated; /* entries stated */
1128 int do_statahead_enter(struct inode *dir, struct dentry **dentry, int lookup);
1129 void ll_statahead_exit(struct inode *dir, struct dentry *dentry, int result);
1130 void ll_stop_statahead(struct inode *inode, void *key);
1133 void ll_statahead_mark(struct inode *dir, struct dentry *dentry)
1135 struct ll_inode_info *lli;
1136 struct ll_dentry_data *ldd = ll_d2d(dentry);
1138 /* dentry has been move to other directory, no need mark */
1139 if (unlikely(dir != dentry->d_parent->d_inode))
1142 lli = ll_i2info(dir);
1143 /* not the same process, don't mark */
1144 if (lli->lli_opendir_pid != cfs_curproc_pid())
1147 spin_lock(&lli->lli_lock);
1148 if (likely(lli->lli_sai != NULL && ldd != NULL))
1149 ldd->lld_sa_generation = lli->lli_sai->sai_generation;
1150 spin_unlock(&lli->lli_lock);
1154 int ll_statahead_enter(struct inode *dir, struct dentry **dentryp, int lookup)
1156 struct ll_inode_info *lli;
1157 struct ll_dentry_data *ldd = ll_d2d(*dentryp);
1159 if (unlikely(dir == NULL))
1162 if (ll_i2sbi(dir)->ll_sa_max == 0)
1165 lli = ll_i2info(dir);
1166 /* not the same process, don't statahead */
1167 if (lli->lli_opendir_pid != cfs_curproc_pid())
1171 * When "ls" a dentry, the system trigger more than once "revalidate" or
1172 * "lookup", for "getattr", for "getxattr", and maybe for others.
1173 * Under patchless client mode, the operation intent is not accurate,
1174 * it maybe misguide the statahead thread. For example:
1175 * The "revalidate" call for "getattr" and "getxattr" of a dentry maybe
1176 * have the same operation intent -- "IT_GETATTR".
1177 * In fact, one dentry should has only one chance to interact with the
1178 * statahead thread, otherwise the statahead windows will be confused.
1179 * The solution is as following:
1180 * Assign "lld_sa_generation" with "sai_generation" when a dentry
1181 * "IT_GETATTR" for the first time, and the subsequent "IT_GETATTR"
1182 * will bypass interacting with statahead thread for checking:
1183 * "lld_sa_generation == lli_sai->sai_generation"
1185 if (ldd && lli->lli_sai &&
1186 ldd->lld_sa_generation == lli->lli_sai->sai_generation)
1189 return do_statahead_enter(dir, dentryp, lookup);
1192 static void inline ll_dops_init(struct dentry *de, int block)
1194 struct ll_dentry_data *lld = ll_d2d(de);
1196 if (lld == NULL && block != 0) {
1202 lld->lld_sa_generation = 0;
1204 de->d_op = &ll_d_ops;
1207 /* llite ioctl register support rountine */
1214 #define LLIOC_MAX_CMD 256
1217 * Rules to write a callback function:
1220 * @magic: Dynamic ioctl call routine will feed this vaule with the pointer
1221 * returned to ll_iocontrol_register. Callback functions should use this
1222 * data to check the potential collasion of ioctl cmd. If collasion is
1223 * found, callback function should return LLIOC_CONT.
1224 * @rcp: The result of ioctl command.
1227 * If @magic matches the pointer returned by ll_iocontrol_data, the
1228 * callback should return LLIOC_STOP; return LLIOC_STOP otherwise.
1230 typedef enum llioc_iter (*llioc_callback_t)(struct inode *inode,
1231 struct file *file, unsigned int cmd, unsigned long arg,
1232 void *magic, int *rcp);
1234 enum llioc_iter ll_iocontrol_call(struct inode *inode, struct file *file,
1235 unsigned int cmd, unsigned long arg, int *rcp);
1237 /* export functions */
1238 /* Register ioctl block dynamatically for a regular file.
1240 * @cmd: the array of ioctl command set
1241 * @count: number of commands in the @cmd
1242 * @cb: callback function, it will be called if an ioctl command is found to
1243 * belong to the command list @cmd.
1246 * A magic pointer will be returned if success;
1247 * otherwise, NULL will be returned.
1249 void *ll_iocontrol_register(llioc_callback_t cb, int count, unsigned int *cmd);
1250 void ll_iocontrol_unregister(void *magic);
1254 /* lclient compat stuff */
1255 #define cl_inode_info ll_inode_info
1256 #define cl_i2info(info) ll_i2info(info)
1257 #define cl_inode_mode(inode) ((inode)->i_mode)
1258 #define cl_i2sbi ll_i2sbi
1259 #define cl_isize_read(inode) i_size_read(inode)
1260 #define cl_isize_write(inode,kms) i_size_write(inode, kms)
1261 #define cl_isize_write_nolock(inode,kms) do {(inode)->i_size=(kms);}while(0)
1263 static inline void cl_isize_lock(struct inode *inode, int lsmlock)
1265 ll_inode_size_lock(inode, lsmlock);
1268 static inline void cl_isize_unlock(struct inode *inode, int lsmlock)
1270 ll_inode_size_unlock(inode, lsmlock);
1273 static inline int cl_merge_lvb(struct inode *inode)
1275 return ll_merge_lvb(inode);
1278 #define cl_inode_atime(inode) LTIME_S((inode)->i_atime)
1279 #define cl_inode_ctime(inode) LTIME_S((inode)->i_ctime)
1280 #define cl_inode_mtime(inode) LTIME_S((inode)->i_mtime)
1282 struct obd_capa *cl_capa_lookup(struct inode *inode, enum cl_req_type crt);
1284 /** direct write pages */
1285 struct ll_dio_pages {
1286 /** page array to be written. we don't support
1287 * partial pages except the last one. */
1288 struct page **ldp_pages;
1289 /* offset of each page */
1290 loff_t *ldp_offsets;
1291 /** if ldp_offsets is NULL, it means a sequential
1292 * pages to be written, then this is the file offset
1293 * of the * first page. */
1294 loff_t ldp_start_offset;
1295 /** how many bytes are to be written. */
1297 /** # of pages in the array. */
1301 extern ssize_t ll_direct_rw_pages(const struct lu_env *env, struct cl_io *io,
1302 int rw, struct inode *inode,
1303 struct ll_dio_pages *pv);
1305 static inline int ll_file_nolock(const struct file *file)
1307 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
1308 struct inode *inode = file->f_dentry->d_inode;
1310 LASSERT(fd != NULL);
1311 return ((fd->fd_flags & LL_FILE_IGNORE_LOCK) ||
1312 (ll_i2sbi(inode)->ll_flags & LL_SBI_NOLCK));
1314 #endif /* LLITE_INTERNAL_H */