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 (c) 2003, 2010, Oracle and/or its affiliates. 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 0x4000000
59 #define LL_IT2STR(it) ((it) ? ldlm_it2str((it)->it_op) : "0")
60 #define LUSTRE_FPRIVATE(file) ((file)->private_data)
62 struct ll_dentry_data {
65 struct obd_client_handle lld_cwd_och;
66 struct obd_client_handle lld_mnt_och;
67 struct lookup_intent *lld_it;
68 unsigned int lld_sa_generation;
71 #define ll_d2d(de) ((struct ll_dentry_data*)((de)->d_fsdata))
73 extern struct file_operations ll_pgcache_seq_fops;
75 #define LLI_INODE_MAGIC 0x111d0de5
76 #define LLI_INODE_DEAD 0xdeadd00d
78 /* remote client permission cache */
79 #define REMOTE_PERM_HASHSIZE 16
81 /* llite setxid/access permission for user on remote client */
82 struct ll_remote_perm {
83 cfs_hlist_node_t lrp_list;
88 int lrp_access_perm; /* MAY_READ/WRITE/EXEC, this
89 is access permission with
90 lrp_fsuid/lrp_fsgid. */
94 /* MDS has an authority for the Size-on-MDS attributes. */
95 LLIF_MDS_SIZE_LOCK = (1 << 0),
96 /* Epoch close is postponed. */
97 LLIF_EPOCH_PENDING = (1 << 1),
98 /* DONE WRITING is allowed. */
99 LLIF_DONE_WRITING = (1 << 2),
100 /* Sizeon-on-MDS attributes are changed. An attribute update needs to
102 LLIF_SOM_DIRTY = (1 << 3),
103 /* File is contented */
104 LLIF_CONTENDED = (1 << 4),
105 /* Truncate uses server lock for this file */
106 LLIF_SRVLOCK = (1 << 5)
110 struct ll_inode_info {
112 cfs_semaphore_t lli_size_sem; /* protect open and change size */
113 void *lli_size_sem_owner;
114 cfs_semaphore_t lli_write_sem;
115 cfs_rw_semaphore_t lli_trunc_sem;
116 char *lli_symlink_name;
119 unsigned long lli_flags;
120 cfs_time_t lli_contention_time;
122 /* this lock protects posix_acl, pending_write_llaps, mmap_cnt */
123 cfs_spinlock_t lli_lock;
124 cfs_list_t lli_close_list;
125 /* handle is to be sent to MDS later on done_writing and setattr.
126 * Open handle data are needed for the recovery to reconstruct
127 * the inode state on the MDS. XXX: recovery is not ready yet. */
128 struct obd_client_handle *lli_pending_och;
130 /* for writepage() only to communicate to fsync */
134 struct posix_acl *lli_posix_acl;
136 /* remote permission hash */
137 cfs_hlist_head_t *lli_remote_perms;
138 unsigned long lli_rmtperm_utime;
139 cfs_semaphore_t lli_rmtperm_sem;
141 cfs_list_t lli_dead_list;
143 cfs_semaphore_t lli_och_sem; /* Protects access to och pointers
144 and their usage counters, also
145 atomicity of check-update of
147 /* We need all three because every inode may be opened in different
149 struct obd_client_handle *lli_mds_read_och;
150 __u64 lli_open_fd_read_count;
151 struct obd_client_handle *lli_mds_write_och;
152 __u64 lli_open_fd_write_count;
153 struct obd_client_handle *lli_mds_exec_och;
154 __u64 lli_open_fd_exec_count;
156 struct inode lli_vfs_inode;
158 /* identifying fields for both metadata and data stacks. */
159 struct lu_fid lli_fid;
160 struct lov_stripe_md *lli_smd;
163 /* open count currently used by capability only, indicate whether
164 * capability needs renewal */
165 cfs_atomic_t lli_open_count;
166 struct obd_capa *lli_mds_capa;
167 cfs_list_t lli_oss_capas;
169 /* metadata statahead */
170 /* protect statahead stuff: lli_opendir_pid, lli_opendir_key, lli_sai,
172 cfs_spinlock_t lli_sa_lock;
174 * "opendir_pid" is the token when lookup/revalid -- I am the owner of
177 pid_t lli_opendir_pid;
179 * since parent-child threads can share the same @file struct,
180 * "opendir_key" is the token when dir close for case of parent exit
181 * before child -- it is me should cleanup the dir readahead. */
182 void *lli_opendir_key;
183 struct ll_statahead_info *lli_sai;
185 struct cl_object *lli_clob;
186 /* the most recent timestamps obtained from mds */
187 struct ost_lvb lli_lvb;
189 * serialize normal readdir and statahead-readdir
191 cfs_semaphore_t lli_readdir_sem;
195 * Locking to guarantee consistency of non-atomic updates to long long i_size,
196 * consistency between file size and KMS, and consistency within
197 * ->lli_smd->lsm_oinfo[]'s.
199 * Implemented by ->lli_size_sem and ->lsm_sem, nested in that order.
202 void ll_inode_size_lock(struct inode *inode, int lock_lsm);
203 void ll_inode_size_unlock(struct inode *inode, int unlock_lsm);
205 // FIXME: replace the name of this with LL_I to conform to kernel stuff
206 // static inline struct ll_inode_info *LL_I(struct inode *inode)
207 static inline struct ll_inode_info *ll_i2info(struct inode *inode)
209 return container_of(inode, struct ll_inode_info, lli_vfs_inode);
212 /* default to about 40meg of readahead on a given system. That much tied
213 * up in 512k readahead requests serviced at 40ms each is about 1GB/s. */
214 #define SBI_DEFAULT_READAHEAD_MAX (40UL << (20 - CFS_PAGE_SHIFT))
216 /* default to read-ahead full files smaller than 2MB on the second read */
217 #define SBI_DEFAULT_READAHEAD_WHOLE_MAX (2UL << (20 - CFS_PAGE_SHIFT))
222 RA_STAT_DISTANT_READPAGE,
223 RA_STAT_MISS_IN_WINDOW,
224 RA_STAT_FAILED_GRAB_PAGE,
225 RA_STAT_FAILED_MATCH,
230 RA_STAT_MAX_IN_FLIGHT,
231 RA_STAT_WRONG_GRAB_PAGE,
236 cfs_atomic_t ra_cur_pages;
237 unsigned long ra_max_pages;
238 unsigned long ra_max_pages_per_file;
239 unsigned long ra_max_read_ahead_whole_pages;
242 /* ra_io_arg will be filled in the beginning of ll_readahead with
243 * ras_lock, then the following ll_read_ahead_pages will read RA
244 * pages according to this arg, all the items in this structure are
245 * counted by page index.
248 unsigned long ria_start; /* start offset of read-ahead*/
249 unsigned long ria_end; /* end offset of read-ahead*/
250 /* If stride read pattern is detected, ria_stoff means where
251 * stride read is started. Note: for normal read-ahead, the
252 * value here is meaningless, and also it will not be accessed*/
254 /* ria_length and ria_pages are the length and pages length in the
255 * stride I/O mode. And they will also be used to check whether
256 * it is stride I/O read-ahead in the read-ahead pages*/
257 unsigned long ria_length;
258 unsigned long ria_pages;
261 /* LL_HIST_MAX=32 causes an overflow */
262 #define LL_HIST_MAX 28
263 #define LL_HIST_START 12 /* buckets start at 2^12 = 4k */
264 #define LL_PROCESS_HIST_MAX 10
265 struct per_process_info {
267 struct obd_histogram pp_r_hist;
268 struct obd_histogram pp_w_hist;
271 /* pp_extents[LL_PROCESS_HIST_MAX] will hold the combined process info */
272 struct ll_rw_extents_info {
273 struct per_process_info pp_extents[LL_PROCESS_HIST_MAX + 1];
276 #define LL_OFFSET_HIST_MAX 100
277 struct ll_rw_process_info {
280 loff_t rw_range_start;
282 loff_t rw_last_file_pos;
284 size_t rw_smallest_extent;
285 size_t rw_largest_extent;
286 struct ll_file_data *rw_last_file;
289 enum stats_track_type {
290 STATS_TRACK_ALL = 0, /* track all processes */
291 STATS_TRACK_PID, /* track process with this pid */
292 STATS_TRACK_PPID, /* track processes with this ppid */
293 STATS_TRACK_GID, /* track processes with this gid */
297 /* flags for sbi->ll_flags */
298 #define LL_SBI_NOLCK 0x01 /* DLM locking disabled (directio-only) */
299 #define LL_SBI_CHECKSUM 0x02 /* checksum each page as it's written */
300 #define LL_SBI_FLOCK 0x04
301 #define LL_SBI_USER_XATTR 0x08 /* support user xattr */
302 #define LL_SBI_ACL 0x10 /* support ACL */
303 #define LL_SBI_RMT_CLIENT 0x40 /* remote client */
304 #define LL_SBI_MDS_CAPA 0x80 /* support mds capa */
305 #define LL_SBI_OSS_CAPA 0x100 /* support oss capa */
306 #define LL_SBI_LOCALFLOCK 0x200 /* Local flocks support by kernel */
307 #define LL_SBI_LRU_RESIZE 0x400 /* lru resize support */
308 #define LL_SBI_LAZYSTATFS 0x800 /* lazystatfs mount option */
309 #define LL_SBI_SOM_PREVIEW 0x1000 /* SOM preview mount option */
310 #define LL_SBI_32BIT_API 0x2000 /* generate 32 bit inodes. */
312 /* default value for ll_sb_info->contention_time */
313 #define SBI_DEFAULT_CONTENTION_SECONDS 60
314 /* default value for lockless_truncate_enable */
315 #define SBI_DEFAULT_LOCKLESS_TRUNCATE_ENABLE 1
316 #define RCE_HASHES 32
318 struct rmtacl_ctl_entry {
320 pid_t rce_key; /* hash key */
321 int rce_ops; /* acl operation type */
324 struct rmtacl_ctl_table {
325 cfs_spinlock_t rct_lock;
326 cfs_list_t rct_entries[RCE_HASHES];
333 pid_t ee_key; /* hash key */
334 struct lu_fid ee_fid;
335 int ee_type; /* ACL type for ACCESS or DEFAULT */
336 ext_acl_xattr_header *ee_acl;
340 cfs_spinlock_t et_lock;
341 cfs_list_t et_entries[EE_HASHES];
346 /* this protects pglist and ra_info. It isn't safe to
347 * grab from interrupt contexts */
348 cfs_spinlock_t ll_lock;
349 cfs_spinlock_t ll_pp_extent_lock; /* Lock for pp_extent entries */
350 cfs_spinlock_t ll_process_lock; /* Lock for ll_rw_process_info */
351 struct obd_uuid ll_sb_uuid;
352 struct obd_export *ll_md_exp;
353 struct obd_export *ll_dt_exp;
354 struct proc_dir_entry* ll_proc_root;
355 struct lu_fid ll_root_fid; /* root object fid */
358 cfs_list_t ll_conn_chain; /* per-conn chain of SBs */
359 struct lustre_client_ocd ll_lco;
361 cfs_list_t ll_orphan_dentry_list; /*please don't ask -p*/
362 struct ll_close_queue *ll_lcq;
364 struct lprocfs_stats *ll_stats; /* lprocfs stats counter */
366 unsigned long ll_async_page_max;
367 unsigned long ll_async_page_count;
369 struct lprocfs_stats *ll_ra_stats;
371 struct ll_ra_info ll_ra_info;
372 unsigned int ll_namelen;
373 struct file_operations *ll_fop;
375 /* =0 - hold lock over whole read/write
376 * >0 - max. chunk to be read/written w/o lock re-acquiring */
377 unsigned long ll_max_rw_chunk;
379 struct lu_site *ll_site;
380 struct cl_device *ll_cl;
382 struct ll_rw_extents_info ll_rw_extents_info;
383 int ll_extent_process_count;
384 struct ll_rw_process_info ll_rw_process_info[LL_PROCESS_HIST_MAX];
385 unsigned int ll_offset_process_count;
386 struct ll_rw_process_info ll_rw_offset_info[LL_OFFSET_HIST_MAX];
387 unsigned int ll_rw_offset_entry_count;
388 enum stats_track_type ll_stats_track_type;
389 int ll_stats_track_id;
392 /* metadata stat-ahead */
393 unsigned int ll_sa_max; /* max statahead RPCs */
394 atomic_t ll_sa_total; /* statahead thread started
396 atomic_t ll_sa_wrong; /* statahead thread stopped for
399 dev_t ll_sdev_orig; /* save s_dev before assign for
401 struct rmtacl_ctl_table ll_rct;
402 struct eacl_table ll_et;
405 #define LL_DEFAULT_MAX_RW_CHUNK (32 * 1024 * 1024)
410 struct task_struct *lrr_reader;
411 cfs_list_t lrr_linkage;
415 * per file-descriptor read-ahead data.
417 struct ll_readahead_state {
418 cfs_spinlock_t ras_lock;
420 * index of the last page that read(2) needed and that wasn't in the
421 * cache. Used by ras_update() to detect seeks.
423 * XXX nikita: if access seeks into cached region, Lustre doesn't see
426 unsigned long ras_last_readpage;
428 * number of pages read after last read-ahead window reset. As window
429 * is reset on each seek, this is effectively a number of consecutive
430 * accesses. Maybe ->ras_accessed_in_window is better name.
432 * XXX nikita: window is also reset (by ras_update()) when Lustre
433 * believes that memory pressure evicts read-ahead pages. In that
434 * case, it probably doesn't make sense to expand window to
435 * PTLRPC_MAX_BRW_PAGES on the third access.
437 unsigned long ras_consecutive_pages;
439 * number of read requests after the last read-ahead window reset
440 * As window is reset on each seek, this is effectively the number
441 * on consecutive read request and is used to trigger read-ahead.
443 unsigned long ras_consecutive_requests;
445 * Parameters of current read-ahead window. Handled by
446 * ras_update(). On the initial access to the file or after a seek,
447 * window is reset to 0. After 3 consecutive accesses, window is
448 * expanded to PTLRPC_MAX_BRW_PAGES. Afterwards, window is enlarged by
449 * PTLRPC_MAX_BRW_PAGES chunks up to ->ra_max_pages.
451 unsigned long ras_window_start, ras_window_len;
453 * Where next read-ahead should start at. This lies within read-ahead
454 * window. Read-ahead window is read in pieces rather than at once
455 * because: 1. lustre limits total number of pages under read-ahead by
456 * ->ra_max_pages (see ll_ra_count_get()), 2. client cannot read pages
457 * not covered by DLM lock.
459 unsigned long ras_next_readahead;
461 * Total number of ll_file_read requests issued, reads originating
462 * due to mmap are not counted in this total. This value is used to
463 * trigger full file read-ahead after multiple reads to a small file.
465 unsigned long ras_requests;
467 * Page index with respect to the current request, these value
468 * will not be accurate when dealing with reads issued via mmap.
470 unsigned long ras_request_index;
472 * list of struct ll_ra_read's one per read(2) call current in
473 * progress against this file descriptor. Used by read-ahead code,
474 * protected by ->ras_lock.
476 cfs_list_t ras_read_beads;
478 * The following 3 items are used for detecting the stride I/O
480 * In stride I/O mode,
481 * ...............|-----data-----|****gap*****|--------|******|....
482 * offset |-stride_pages-|-stride_gap-|
483 * ras_stride_offset = offset;
484 * ras_stride_length = stride_pages + stride_gap;
485 * ras_stride_pages = stride_pages;
486 * Note: all these three items are counted by pages.
488 unsigned long ras_stride_length;
489 unsigned long ras_stride_pages;
490 pgoff_t ras_stride_offset;
492 * number of consecutive stride request count, and it is similar as
493 * ras_consecutive_requests, but used for stride I/O mode.
494 * Note: only more than 2 consecutive stride request are detected,
495 * stride read-ahead will be enable
497 unsigned long ras_consecutive_stride_requests;
505 extern cfs_mem_cache_t *ll_file_data_slab;
506 struct lustre_handle;
507 struct ll_file_data {
508 struct ll_readahead_state fd_ras;
510 struct ccc_grouplock fd_grouplock;
511 struct ll_file_dir fd_dir;
513 struct file *fd_file;
516 struct lov_stripe_md;
518 extern cfs_spinlock_t inode_lock;
520 extern struct proc_dir_entry *proc_lustre_fs_root;
522 static inline struct inode *ll_info2i(struct ll_inode_info *lli)
524 return &lli->lli_vfs_inode;
528 struct inode *icbd_parent;
529 struct dentry **icbd_childp;
533 __u32 ll_i2suppgid(struct inode *i);
534 void ll_i2gids(__u32 *suppgids, struct inode *i1,struct inode *i2);
536 static inline int ll_need_32bit_api(struct ll_sb_info *sbi)
538 #if BITS_PER_LONG == 32
541 return unlikely(cfs_curproc_is_32bit() || (sbi->ll_flags & LL_SBI_32BIT_API));
545 #define LLAP_MAGIC 98764321
547 extern cfs_mem_cache_t *ll_async_page_slab;
548 extern size_t ll_async_page_slab_size;
550 void ll_ra_read_in(struct file *f, struct ll_ra_read *rar);
551 void ll_ra_read_ex(struct file *f, struct ll_ra_read *rar);
552 struct ll_ra_read *ll_ra_read_get(struct file *f);
554 /* llite/lproc_llite.c */
556 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
557 struct super_block *sb, char *osc, char *mdc);
558 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi);
559 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count);
560 void lprocfs_llite_init_vars(struct lprocfs_static_vars *lvars);
562 static inline int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
563 struct super_block *sb, char *osc, char *mdc){return 0;}
564 static inline void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi) {}
565 static void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count) {}
566 static void lprocfs_llite_init_vars(struct lprocfs_static_vars *lvars)
568 memset(lvars, 0, sizeof(*lvars));
574 static inline void ll_put_page(struct page *page)
577 page_cache_release(page);
580 extern struct file_operations ll_dir_operations;
581 extern struct inode_operations ll_dir_inode_operations;
582 struct page *ll_get_dir_page(struct file *filp, struct inode *dir, __u64 hash,
583 int exact, struct ll_dir_chain *chain);
585 int ll_get_mdt_idx(struct inode *inode);
587 int ll_objects_destroy(struct ptlrpc_request *request,
589 struct inode *ll_iget(struct super_block *sb, ino_t hash,
590 struct lustre_md *lic);
591 int ll_md_blocking_ast(struct ldlm_lock *, struct ldlm_lock_desc *,
592 void *data, int flag);
593 struct lookup_intent *ll_convert_intent(struct open_intent *oit,
595 int ll_lookup_it_finish(struct ptlrpc_request *request,
596 struct lookup_intent *it, void *data);
599 int ll_prepare_write(struct file *, struct page *, unsigned from, unsigned to);
600 int ll_commit_write(struct file *, struct page *, unsigned from, unsigned to);
601 int ll_writepage(struct page *page, struct writeback_control *wbc);
602 void ll_removepage(struct page *page);
603 int ll_readpage(struct file *file, struct page *page);
604 void ll_readahead_init(struct inode *inode, struct ll_readahead_state *ras);
605 void ll_truncate(struct inode *inode);
606 int ll_file_punch(struct inode *, loff_t, int);
607 ssize_t ll_file_lockless_io(struct file *, char *, size_t, loff_t *, int);
608 void ll_clear_file_contended(struct inode*);
609 int ll_sync_page_range(struct inode *, struct address_space *, loff_t, size_t);
610 int ll_readahead(const struct lu_env *env, struct cl_io *io, struct ll_readahead_state *ras,
611 struct address_space *mapping, struct cl_page_list *queue, int flags);
614 extern struct file_operations ll_file_operations;
615 extern struct file_operations ll_file_operations_flock;
616 extern struct file_operations ll_file_operations_noflock;
617 extern struct inode_operations ll_file_inode_operations;
618 extern int ll_inode_revalidate_it(struct dentry *, struct lookup_intent *,
620 extern int ll_have_md_lock(struct inode *inode, __u64 bits, ldlm_mode_t l_req_mode);
621 extern ldlm_mode_t ll_take_md_lock(struct inode *inode, __u64 bits,
622 struct lustre_handle *lockh);
623 int __ll_inode_revalidate_it(struct dentry *, struct lookup_intent *, __u64 bits);
624 int ll_revalidate_nd(struct dentry *dentry, struct nameidata *nd);
625 int ll_file_open(struct inode *inode, struct file *file);
626 int ll_file_release(struct inode *inode, struct file *file);
627 int ll_glimpse_ioctl(struct ll_sb_info *sbi,
628 struct lov_stripe_md *lsm, lstat_t *st);
629 void ll_ioepoch_open(struct ll_inode_info *lli, __u64 ioepoch);
630 int ll_local_open(struct file *file,
631 struct lookup_intent *it, struct ll_file_data *fd,
632 struct obd_client_handle *och);
633 int ll_release_openhandle(struct dentry *, struct lookup_intent *);
634 int ll_md_close(struct obd_export *md_exp, struct inode *inode,
636 int ll_md_real_close(struct inode *inode, int flags);
637 void ll_ioepoch_close(struct inode *inode, struct md_op_data *op_data,
638 struct obd_client_handle **och, unsigned long flags);
639 void ll_done_writing_attr(struct inode *inode, struct md_op_data *op_data);
640 int ll_som_update(struct inode *inode, struct md_op_data *op_data);
641 int ll_inode_getattr(struct inode *inode, struct obdo *obdo,
642 __u64 ioepoch, int sync);
643 int ll_md_setattr(struct inode *inode, struct md_op_data *op_data,
644 struct md_open_data **mod);
645 void ll_pack_inode2opdata(struct inode *inode, struct md_op_data *op_data,
646 struct lustre_handle *fh);
647 extern void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
648 struct ll_file_data *file, loff_t pos,
649 size_t count, int rw);
650 int ll_getattr_it(struct vfsmount *mnt, struct dentry *de,
651 struct lookup_intent *it, struct kstat *stat);
652 int ll_getattr(struct vfsmount *mnt, struct dentry *de, struct kstat *stat);
653 struct ll_file_data *ll_file_data_get(void);
654 #ifndef HAVE_INODE_PERMISION_2ARGS
655 int ll_inode_permission(struct inode *inode, int mask, struct nameidata *nd);
657 int ll_inode_permission(struct inode *inode, int mask);
659 int ll_lov_setstripe_ea_info(struct inode *inode, struct file *file,
660 int flags, struct lov_user_md *lum,
662 int ll_lov_getstripe_ea_info(struct inode *inode, const char *filename,
663 struct lov_mds_md **lmm, int *lmm_size,
664 struct ptlrpc_request **request);
665 int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump,
667 int ll_dir_getstripe(struct inode *inode, struct lov_mds_md **lmm,
668 int *lmm_size, struct ptlrpc_request **request);
669 int ll_fsync(struct file *file, struct dentry *dentry, int data);
670 int ll_do_fiemap(struct inode *inode, struct ll_user_fiemap *fiemap,
672 int ll_merge_lvb(struct inode *inode);
673 int ll_get_grouplock(struct inode *inode, struct file *file, unsigned long arg);
674 int ll_put_grouplock(struct inode *inode, struct file *file, unsigned long arg);
675 int ll_fid2path(struct obd_export *exp, void *arg);
680 * protect race ll_find_aliases vs ll_revalidate_it vs ll_unhash_aliases
682 int ll_dops_init(struct dentry *de, int block);
683 extern cfs_spinlock_t ll_lookup_lock;
684 extern struct dentry_operations ll_d_ops;
685 void ll_intent_drop_lock(struct lookup_intent *);
686 void ll_intent_release(struct lookup_intent *);
687 int ll_drop_dentry(struct dentry *dentry);
688 int ll_drop_dentry(struct dentry *dentry);
689 void ll_unhash_aliases(struct inode *);
690 void ll_frob_intent(struct lookup_intent **itp, struct lookup_intent *deft);
691 void ll_lookup_finish_locks(struct lookup_intent *it, struct dentry *dentry);
692 int ll_dcompare(struct dentry *parent, struct qstr *d_name, struct qstr *name);
693 int ll_revalidate_it_finish(struct ptlrpc_request *request,
694 struct lookup_intent *it, struct dentry *de);
696 /* llite/llite_lib.c */
697 extern struct super_operations lustre_super_operations;
699 char *ll_read_opt(const char *opt, char *data);
700 void ll_lli_init(struct ll_inode_info *lli);
701 int ll_fill_super(struct super_block *sb);
702 void ll_put_super(struct super_block *sb);
703 void ll_kill_super(struct super_block *sb);
704 struct inode *ll_inode_from_lock(struct ldlm_lock *lock);
705 void ll_clear_inode(struct inode *inode);
706 int ll_setattr_raw(struct inode *inode, struct iattr *attr);
707 int ll_setattr(struct dentry *de, struct iattr *attr);
708 #ifndef HAVE_STATFS_DENTRY_PARAM
709 int ll_statfs(struct super_block *sb, struct kstatfs *sfs);
711 int ll_statfs(struct dentry *de, struct kstatfs *sfs);
713 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
714 __u64 max_age, __u32 flags);
715 void ll_update_inode(struct inode *inode, struct lustre_md *md);
716 void ll_read_inode2(struct inode *inode, void *opaque);
717 void ll_delete_inode(struct inode *inode);
718 int ll_iocontrol(struct inode *inode, struct file *file,
719 unsigned int cmd, unsigned long arg);
720 int ll_flush_ctx(struct inode *inode);
721 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
722 void ll_umount_begin(struct vfsmount *vfsmnt, int flags);
724 void ll_umount_begin(struct super_block *sb);
726 int ll_remount_fs(struct super_block *sb, int *flags, char *data);
727 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs);
728 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
729 struct super_block *);
730 void lustre_dump_dentry(struct dentry *, int recur);
731 void lustre_dump_inode(struct inode *);
732 int ll_obd_statfs(struct inode *inode, void *arg);
733 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *max_mdsize);
734 int ll_process_config(struct lustre_cfg *lcfg);
735 struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
736 struct inode *i1, struct inode *i2,
737 const char *name, int namelen,
738 int mode, __u32 opc, void *data);
739 void ll_finish_md_op_data(struct md_op_data *op_data);
741 /* llite/llite_nfs.c */
742 extern struct export_operations lustre_export_operations;
743 __u32 get_uuid2int(const char *name, int len);
745 /* llite/special.c */
746 extern struct inode_operations ll_special_inode_operations;
747 extern struct file_operations ll_special_chr_inode_fops;
748 extern struct file_operations ll_special_chr_file_fops;
749 extern struct file_operations ll_special_blk_inode_fops;
750 extern struct file_operations ll_special_fifo_inode_fops;
751 extern struct file_operations ll_special_fifo_file_fops;
752 extern struct file_operations ll_special_sock_inode_fops;
754 /* llite/symlink.c */
755 extern struct inode_operations ll_fast_symlink_inode_operations;
757 /* llite/llite_close.c */
758 struct ll_close_queue {
759 cfs_spinlock_t lcq_lock;
761 cfs_waitq_t lcq_waitq;
762 cfs_completion_t lcq_comp;
763 cfs_atomic_t lcq_stop;
766 struct ccc_object *cl_inode2ccc(struct inode *inode);
769 void vvp_write_pending (struct ccc_object *club, struct ccc_page *page);
770 void vvp_write_complete(struct ccc_object *club, struct ccc_page *page);
772 /* specific achitecture can implement only part of this list */
773 enum vvp_io_subtype {
776 /** io called from .sendfile */
778 /** io started from splice_{read|write} */
785 enum vvp_io_subtype cui_io_subtype;
789 read_actor_t cui_actor;
793 struct pipe_inode_info *cui_pipe;
794 unsigned int cui_flags;
796 struct vvp_fault_io {
798 * Inode modification time that is checked across DLM
802 struct vm_area_struct *ft_vma;
804 * locked page returned from vvp_io
806 cfs_page_t *ft_vmpage;
807 #ifndef HAVE_VM_OP_FAULT
808 struct vm_nopage_api {
810 * Virtual address at which fault occurred.
812 unsigned long ft_address;
814 * Fault type, as to be supplied to
820 struct vm_fault_api {
824 struct vm_fault *ft_vmf;
826 * fault API used bitflags for return code.
828 unsigned int ft_flags;
834 * Read-ahead state used by read and page-fault IO contexts.
836 struct ll_ra_read cui_bead;
838 * Set when cui_bead has been initialized.
840 int cui_ra_window_set;
842 * Partially truncated page, that vvp_io_trunc_start() keeps locked
845 struct cl_page *cui_partpage;
849 * IO arguments for various VFS I/O interfaces.
852 /** normal/sendfile/splice */
853 enum vvp_io_subtype via_io_subtype;
857 #ifndef HAVE_FILE_WRITEV
858 struct kiocb *via_iocb;
860 struct iovec *via_iov;
861 unsigned long via_nrsegs;
864 read_actor_t via_actor;
868 struct pipe_inode_info *via_pipe;
869 unsigned int via_flags;
874 struct ll_cl_context {
876 struct cl_io *lcc_io;
877 struct cl_page *lcc_page;
878 struct lu_env *lcc_env;
883 struct vvp_thread_info {
884 struct ost_lvb vti_lvb;
885 struct cl_2queue vti_queue;
886 struct iovec vti_local_iov;
887 struct vvp_io_args vti_args;
888 struct ra_io_arg vti_ria;
889 struct kiocb vti_kiocb;
890 struct ll_cl_context vti_io_ctx;
893 static inline struct vvp_thread_info *vvp_env_info(const struct lu_env *env)
895 extern struct lu_context_key vvp_key;
896 struct vvp_thread_info *info;
898 info = lu_context_key_get(&env->le_ctx, &vvp_key);
899 LASSERT(info != NULL);
903 static inline struct vvp_io_args *vvp_env_args(const struct lu_env *env,
904 enum vvp_io_subtype type)
906 struct vvp_io_args *ret = &vvp_env_info(env)->vti_args;
908 ret->via_io_subtype = type;
914 struct vvp_io vs_ios;
917 static inline struct vvp_session *vvp_env_session(const struct lu_env *env)
919 extern struct lu_context_key vvp_session_key;
920 struct vvp_session *ses;
922 ses = lu_context_key_get(env->le_ses, &vvp_session_key);
923 LASSERT(ses != NULL);
927 static inline struct vvp_io *vvp_env_io(const struct lu_env *env)
929 return &vvp_env_session(env)->vs_ios;
932 void ll_queue_done_writing(struct inode *inode, unsigned long flags);
933 void ll_close_thread_shutdown(struct ll_close_queue *lcq);
934 int ll_close_thread_start(struct ll_close_queue **lcq_ret);
936 /* llite/llite_mmap.c */
937 typedef struct rb_root rb_root_t;
938 typedef struct rb_node rb_node_t;
940 struct ll_lock_tree_node;
941 struct ll_lock_tree {
943 cfs_list_t lt_locked_list;
944 struct ll_file_data *lt_fd;
947 int ll_teardown_mmaps(struct address_space *mapping, __u64 first, __u64 last);
948 int ll_file_mmap(struct file * file, struct vm_area_struct * vma);
949 struct ll_lock_tree_node * ll_node_from_inode(struct inode *inode, __u64 start,
950 __u64 end, ldlm_mode_t mode);
951 void policy_from_vma(ldlm_policy_data_t *policy,
952 struct vm_area_struct *vma, unsigned long addr, size_t count);
953 struct vm_area_struct *our_vma(unsigned long addr, size_t count);
955 #define ll_s2sbi(sb) (s2lsi(sb)->lsi_llsbi)
957 /* don't need an addref as the sb_info should be holding one */
958 static inline struct obd_export *ll_s2dtexp(struct super_block *sb)
960 return ll_s2sbi(sb)->ll_dt_exp;
963 /* don't need an addref as the sb_info should be holding one */
964 static inline struct obd_export *ll_s2mdexp(struct super_block *sb)
966 return ll_s2sbi(sb)->ll_md_exp;
969 static inline struct client_obd *sbi2mdc(struct ll_sb_info *sbi)
971 struct obd_device *obd = sbi->ll_md_exp->exp_obd;
977 // FIXME: replace the name of this with LL_SB to conform to kernel stuff
978 static inline struct ll_sb_info *ll_i2sbi(struct inode *inode)
980 return ll_s2sbi(inode->i_sb);
983 static inline struct obd_export *ll_i2dtexp(struct inode *inode)
985 return ll_s2dtexp(inode->i_sb);
988 static inline struct obd_export *ll_i2mdexp(struct inode *inode)
990 return ll_s2mdexp(inode->i_sb);
993 static inline struct lu_fid *ll_inode2fid(struct inode *inode)
996 LASSERT(inode != NULL);
997 fid = &ll_i2info(inode)->lli_fid;
998 LASSERT(fid_is_igif(fid) || fid_ver(fid) == 0);
1002 static inline int ll_mds_max_easize(struct super_block *sb)
1004 return sbi2mdc(ll_s2sbi(sb))->cl_max_mds_easize;
1007 static inline __u64 ll_file_maxbytes(struct inode *inode)
1009 return ll_i2info(inode)->lli_maxbytes;
1013 int ll_setxattr(struct dentry *dentry, const char *name,
1014 const void *value, size_t size, int flags);
1015 ssize_t ll_getxattr(struct dentry *dentry, const char *name,
1016 void *buffer, size_t size);
1017 ssize_t ll_listxattr(struct dentry *dentry, char *buffer, size_t size);
1018 int ll_removexattr(struct dentry *dentry, const char *name);
1020 /* llite/remote_perm.c */
1021 extern cfs_mem_cache_t *ll_remote_perm_cachep;
1022 extern cfs_mem_cache_t *ll_rmtperm_hash_cachep;
1024 cfs_hlist_head_t *alloc_rmtperm_hash(void);
1025 void free_rmtperm_hash(cfs_hlist_head_t *hash);
1026 int ll_update_remote_perm(struct inode *inode, struct mdt_remote_perm *perm);
1027 int lustre_check_remote_perm(struct inode *inode, int mask);
1029 /* llite/llite_capa.c */
1030 extern cfs_timer_t ll_capa_timer;
1032 int ll_capa_thread_start(void);
1033 void ll_capa_thread_stop(void);
1034 void ll_capa_timer_callback(unsigned long unused);
1036 struct obd_capa *ll_add_capa(struct inode *inode, struct obd_capa *ocapa);
1037 int ll_update_capa(struct obd_capa *ocapa, struct lustre_capa *capa);
1039 void ll_capa_open(struct inode *inode);
1040 void ll_capa_close(struct inode *inode);
1042 struct obd_capa *ll_mdscapa_get(struct inode *inode);
1043 struct obd_capa *ll_osscapa_get(struct inode *inode, __u64 opc);
1045 void ll_truncate_free_capa(struct obd_capa *ocapa);
1046 void ll_clear_inode_capas(struct inode *inode);
1047 void ll_print_capa_stat(struct ll_sb_info *sbi);
1049 /* llite/llite_cl.c */
1050 extern struct lu_device_type vvp_device_type;
1053 * Common IO arguments for various VFS I/O interfaces.
1056 int cl_sb_init(struct super_block *sb);
1057 int cl_sb_fini(struct super_block *sb);
1058 int cl_inode_init(struct inode *inode, struct lustre_md *md);
1059 void cl_inode_fini(struct inode *inode);
1061 enum cl_lock_mode vvp_mode_from_vma(struct vm_area_struct *vma);
1062 void ll_io_init(struct cl_io *io, const struct file *file, int write);
1064 void ras_update(struct ll_sb_info *sbi, struct inode *inode,
1065 struct ll_readahead_state *ras, unsigned long index,
1067 void ll_ra_count_put(struct ll_sb_info *sbi, unsigned long len);
1068 int ll_is_file_contended(struct file *file);
1069 void ll_ra_stats_inc(struct address_space *mapping, enum ra_stat which);
1071 /* llite/llite_rmtacl.c */
1072 #ifdef CONFIG_FS_POSIX_ACL
1073 obd_valid rce_ops2valid(int ops);
1074 struct rmtacl_ctl_entry *rct_search(struct rmtacl_ctl_table *rct, pid_t key);
1075 int rct_add(struct rmtacl_ctl_table *rct, pid_t key, int ops);
1076 int rct_del(struct rmtacl_ctl_table *rct, pid_t key);
1077 void rct_init(struct rmtacl_ctl_table *rct);
1078 void rct_fini(struct rmtacl_ctl_table *rct);
1080 void ee_free(struct eacl_entry *ee);
1081 int ee_add(struct eacl_table *et, pid_t key, struct lu_fid *fid, int type,
1082 ext_acl_xattr_header *header);
1083 struct eacl_entry *et_search_del(struct eacl_table *et, pid_t key,
1084 struct lu_fid *fid, int type);
1085 void et_search_free(struct eacl_table *et, pid_t key);
1086 void et_init(struct eacl_table *et);
1087 void et_fini(struct eacl_table *et);
1092 #define LL_SA_RPC_MIN 2
1093 #define LL_SA_RPC_DEF 32
1094 #define LL_SA_RPC_MAX 8192
1096 /* per inode struct, for dir only */
1097 struct ll_statahead_info {
1098 struct inode *sai_inode;
1099 unsigned int sai_generation; /* generation for statahead */
1100 cfs_atomic_t sai_refcount; /* when access this struct, hold
1102 unsigned int sai_sent; /* stat requests sent count */
1103 unsigned int sai_replied; /* stat requests which received
1105 unsigned int sai_max; /* max ahead of lookup */
1106 unsigned int sai_index; /* index of statahead entry */
1107 unsigned int sai_index_next; /* index for the next statahead
1108 * entry to be stated */
1109 unsigned int sai_hit; /* hit count */
1110 unsigned int sai_miss; /* miss count:
1111 * for "ls -al" case, it includes
1112 * hidden dentry miss;
1113 * for "ls -l" case, it does not
1114 * include hidden dentry miss.
1115 * "sai_miss_hidden" is used for
1118 unsigned int sai_consecutive_miss; /* consecutive miss */
1119 unsigned int sai_miss_hidden;/* "ls -al", but first dentry
1120 * is not a hidden one */
1121 unsigned int sai_skip_hidden;/* skipped hidden dentry count */
1122 unsigned int sai_ls_all:1; /* "ls -al", do stat-ahead for
1124 cfs_waitq_t sai_waitq; /* stat-ahead wait queue */
1125 struct ptlrpc_thread sai_thread; /* stat-ahead thread */
1126 cfs_list_t sai_entries_sent; /* entries sent out */
1127 cfs_list_t sai_entries_received; /* entries returned */
1128 cfs_list_t sai_entries_stated; /* entries stated */
1129 pid_t sai_pid; /* pid of statahead itself */
1132 int do_statahead_enter(struct inode *dir, struct dentry **dentry, int lookup);
1133 void ll_statahead_exit(struct inode *dir, struct dentry *dentry, int result);
1134 void ll_stop_statahead(struct inode *dir, void *key);
1137 void ll_statahead_mark(struct inode *dir, struct dentry *dentry)
1139 struct ll_inode_info *lli;
1140 struct ll_dentry_data *ldd = ll_d2d(dentry);
1142 /* dentry has been move to other directory, no need mark */
1143 if (unlikely(dir != dentry->d_parent->d_inode))
1146 lli = ll_i2info(dir);
1147 /* not the same process, don't mark */
1148 if (lli->lli_opendir_pid != cfs_curproc_pid())
1151 cfs_spin_lock(&lli->lli_sa_lock);
1152 if (likely(lli->lli_sai != NULL && ldd != NULL))
1153 ldd->lld_sa_generation = lli->lli_sai->sai_generation;
1154 cfs_spin_unlock(&lli->lli_sa_lock);
1158 int ll_statahead_enter(struct inode *dir, struct dentry **dentryp, int lookup)
1160 struct ll_inode_info *lli;
1161 struct ll_dentry_data *ldd = ll_d2d(*dentryp);
1163 if (unlikely(dir == NULL))
1166 if (ll_i2sbi(dir)->ll_sa_max == 0)
1169 lli = ll_i2info(dir);
1170 /* not the same process, don't statahead */
1171 if (lli->lli_opendir_pid != cfs_curproc_pid())
1175 * When "ls" a dentry, the system trigger more than once "revalidate" or
1176 * "lookup", for "getattr", for "getxattr", and maybe for others.
1177 * Under patchless client mode, the operation intent is not accurate,
1178 * it maybe misguide the statahead thread. For example:
1179 * The "revalidate" call for "getattr" and "getxattr" of a dentry maybe
1180 * have the same operation intent -- "IT_GETATTR".
1181 * In fact, one dentry should has only one chance to interact with the
1182 * statahead thread, otherwise the statahead windows will be confused.
1183 * The solution is as following:
1184 * Assign "lld_sa_generation" with "sai_generation" when a dentry
1185 * "IT_GETATTR" for the first time, and the subsequent "IT_GETATTR"
1186 * will bypass interacting with statahead thread for checking:
1187 * "lld_sa_generation == lli_sai->sai_generation"
1189 if (ldd && lli->lli_sai &&
1190 ldd->lld_sa_generation == lli->lli_sai->sai_generation)
1193 return do_statahead_enter(dir, dentryp, lookup);
1196 /* llite ioctl register support rountine */
1203 #define LLIOC_MAX_CMD 256
1206 * Rules to write a callback function:
1209 * @magic: Dynamic ioctl call routine will feed this vaule with the pointer
1210 * returned to ll_iocontrol_register. Callback functions should use this
1211 * data to check the potential collasion of ioctl cmd. If collasion is
1212 * found, callback function should return LLIOC_CONT.
1213 * @rcp: The result of ioctl command.
1216 * If @magic matches the pointer returned by ll_iocontrol_data, the
1217 * callback should return LLIOC_STOP; return LLIOC_STOP otherwise.
1219 typedef enum llioc_iter (*llioc_callback_t)(struct inode *inode,
1220 struct file *file, unsigned int cmd, unsigned long arg,
1221 void *magic, int *rcp);
1223 enum llioc_iter ll_iocontrol_call(struct inode *inode, struct file *file,
1224 unsigned int cmd, unsigned long arg, int *rcp);
1226 /* export functions */
1227 /* Register ioctl block dynamatically for a regular file.
1229 * @cmd: the array of ioctl command set
1230 * @count: number of commands in the @cmd
1231 * @cb: callback function, it will be called if an ioctl command is found to
1232 * belong to the command list @cmd.
1235 * A magic pointer will be returned if success;
1236 * otherwise, NULL will be returned.
1238 void *ll_iocontrol_register(llioc_callback_t cb, int count, unsigned int *cmd);
1239 void ll_iocontrol_unregister(void *magic);
1243 /* lclient compat stuff */
1244 #define cl_inode_info ll_inode_info
1245 #define cl_i2info(info) ll_i2info(info)
1246 #define cl_inode_mode(inode) ((inode)->i_mode)
1247 #define cl_i2sbi ll_i2sbi
1249 static inline void cl_isize_lock(struct inode *inode, int lsmlock)
1251 ll_inode_size_lock(inode, lsmlock);
1254 static inline void cl_isize_unlock(struct inode *inode, int lsmlock)
1256 ll_inode_size_unlock(inode, lsmlock);
1259 static inline void cl_isize_write_nolock(struct inode *inode, loff_t kms)
1261 LASSERT_SEM_LOCKED(&ll_i2info(inode)->lli_size_sem);
1262 i_size_write(inode, kms);
1265 static inline void cl_isize_write(struct inode *inode, loff_t kms)
1267 ll_inode_size_lock(inode, 0);
1268 i_size_write(inode, kms);
1269 ll_inode_size_unlock(inode, 0);
1272 #define cl_isize_read(inode) i_size_read(inode)
1274 static inline int cl_merge_lvb(struct inode *inode)
1276 return ll_merge_lvb(inode);
1279 #define cl_inode_atime(inode) LTIME_S((inode)->i_atime)
1280 #define cl_inode_ctime(inode) LTIME_S((inode)->i_ctime)
1281 #define cl_inode_mtime(inode) LTIME_S((inode)->i_mtime)
1283 struct obd_capa *cl_capa_lookup(struct inode *inode, enum cl_req_type crt);
1285 /** direct write pages */
1286 struct ll_dio_pages {
1287 /** page array to be written. we don't support
1288 * partial pages except the last one. */
1289 struct page **ldp_pages;
1290 /* offset of each page */
1291 loff_t *ldp_offsets;
1292 /** if ldp_offsets is NULL, it means a sequential
1293 * pages to be written, then this is the file offset
1294 * of the * first page. */
1295 loff_t ldp_start_offset;
1296 /** how many bytes are to be written. */
1298 /** # of pages in the array. */
1302 extern ssize_t ll_direct_rw_pages(const struct lu_env *env, struct cl_io *io,
1303 int rw, struct inode *inode,
1304 struct ll_dio_pages *pv);
1306 static inline int ll_file_nolock(const struct file *file)
1308 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
1309 struct inode *inode = file->f_dentry->d_inode;
1311 LASSERT(fd != NULL);
1312 return ((fd->fd_flags & LL_FILE_IGNORE_LOCK) ||
1313 (ll_i2sbi(inode)->ll_flags & LL_SBI_NOLCK));
1315 #endif /* LLITE_INTERNAL_H */