4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2013, Intel Corporation.
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
39 #include <lustre_debug.h>
40 #include <lustre_ver.h>
41 #include <lustre_disk.h> /* for s2sbi */
42 #include <lustre_eacl.h>
44 /* for struct cl_lock_descr and struct cl_io */
45 #include <cl_object.h>
47 #include <lustre_lmv.h>
48 #include <lustre_mdc.h>
49 #include <linux/lustre_intent.h>
50 #include <linux/compat.h>
56 #ifndef VM_FAULT_RETRY
57 #define VM_FAULT_RETRY 0
60 /* Kernel 3.1 kills LOOKUP_CONTINUE, LOOKUP_PARENT is equivalent to it.
61 * seem kernel commit 49084c3bb2055c401f3493c13edae14d49128ca0 */
62 #ifndef LOOKUP_CONTINUE
63 #define LOOKUP_CONTINUE LOOKUP_PARENT
66 /** Only used on client-side for indicating the tail of dir hash/offset. */
67 #define LL_DIR_END_OFF 0x7fffffffffffffffULL
68 #define LL_DIR_END_OFF_32BIT 0x7fffffffUL
70 #define LL_IT2STR(it) ((it) ? ldlm_it2str((it)->it_op) : "0")
71 #define LUSTRE_FPRIVATE(file) ((file)->private_data)
73 struct ll_dentry_data {
76 struct obd_client_handle lld_cwd_och;
77 struct obd_client_handle lld_mnt_och;
78 struct lookup_intent *lld_it;
79 unsigned int lld_sa_generation;
80 unsigned int lld_invalid:1;
81 struct rcu_head lld_rcu_head;
84 #define ll_d2d(de) ((struct ll_dentry_data*)((de)->d_fsdata))
86 extern struct file_operations ll_pgcache_seq_fops;
88 #define LLI_INODE_MAGIC 0x111d0de5
89 #define LLI_INODE_DEAD 0xdeadd00d
91 /* remote client permission cache */
92 #define REMOTE_PERM_HASHSIZE 16
94 struct ll_getname_data {
95 #ifdef HAVE_DIR_CONTEXT
96 struct dir_context ctx;
98 char *lgd_name; /* points to a buffer with NAME_MAX+1 size */
99 struct lu_fid lgd_fid; /* target fid we are looking for */
100 int lgd_found; /* inode matched? */
103 /* llite setxid/access permission for user on remote client */
104 struct ll_remote_perm {
105 cfs_hlist_node_t lrp_list;
110 int lrp_access_perm; /* MAY_READ/WRITE/EXEC, this
111 is access permission with
112 lrp_fsuid/lrp_fsgid. */
116 /* MDS has an authority for the Size-on-MDS attributes. */
117 LLIF_MDS_SIZE_LOCK = (1 << 0),
118 /* Epoch close is postponed. */
119 LLIF_EPOCH_PENDING = (1 << 1),
120 /* DONE WRITING is allowed. */
121 LLIF_DONE_WRITING = (1 << 2),
122 /* Sizeon-on-MDS attributes are changed. An attribute update needs to
124 LLIF_SOM_DIRTY = (1 << 3),
125 /* File is contented */
126 LLIF_CONTENDED = (1 << 4),
127 /* Truncate uses server lock for this file */
128 LLIF_SRVLOCK = (1 << 5),
129 /* File data is modified. */
130 LLIF_DATA_MODIFIED = (1 << 6),
131 /* File is being restored */
132 LLIF_FILE_RESTORING = (1 << 7),
133 /* Xattr cache is attached to the file */
134 LLIF_XATTR_CACHE = (1 << 8),
137 struct ll_inode_info {
138 __u32 lli_inode_magic;
143 struct posix_acl *lli_posix_acl;
145 cfs_hlist_head_t *lli_remote_perms;
146 struct mutex lli_rmtperm_mutex;
148 /* identifying fields for both metadata and data stacks. */
149 struct lu_fid lli_fid;
150 /* Parent fid for accessing default stripe data on parent directory
151 * for allocating OST objects after a mknod() and later open-by-FID. */
152 struct lu_fid lli_pfid;
154 cfs_list_t lli_close_list;
155 cfs_list_t lli_oss_capas;
156 /* open count currently used by capability only, indicate whether
157 * capability needs renewal */
158 cfs_atomic_t lli_open_count;
159 struct obd_capa *lli_mds_capa;
160 cfs_time_t lli_rmtperm_time;
162 /* handle is to be sent to MDS later on done_writing and setattr.
163 * Open handle data are needed for the recovery to reconstruct
164 * the inode state on the MDS. XXX: recovery is not ready yet. */
165 struct obd_client_handle *lli_pending_och;
167 /* We need all three because every inode may be opened in different
169 struct obd_client_handle *lli_mds_read_och;
170 struct obd_client_handle *lli_mds_write_och;
171 struct obd_client_handle *lli_mds_exec_och;
172 __u64 lli_open_fd_read_count;
173 __u64 lli_open_fd_write_count;
174 __u64 lli_open_fd_exec_count;
175 /* Protects access to och pointers and their usage counters */
176 struct mutex lli_och_mutex;
178 struct inode lli_vfs_inode;
180 /* the most recent timestamps obtained from mds */
181 struct ost_lvb lli_lvb;
182 spinlock_t lli_agl_lock;
184 /* Try to make the d::member and f::member are aligned. Before using
185 * these members, make clear whether it is directory or not. */
189 /* serialize normal readdir and statahead-readdir. */
190 struct mutex d_readdir_mutex;
192 /* metadata statahead */
193 /* since parent-child threads can share the same @file
194 * struct, "opendir_key" is the token when dir close for
195 * case of parent exit before child -- it is me should
196 * cleanup the dir readahead. */
198 struct ll_statahead_info *d_sai;
199 struct posix_acl *d_def_acl;
200 /* protect statahead stuff. */
201 spinlock_t d_sa_lock;
202 /* "opendir_pid" is the token when lookup/revalid
203 * -- I am the owner of dir statahead. */
205 /* directory stripe information */
206 struct lmv_stripe_md *d_lsm_md;
207 /* striped directory size */
208 loff_t d_stripe_size;
209 /* striped directory nlink */
210 __u64 d_stripe_nlink;
213 #define lli_readdir_mutex u.d.d_readdir_mutex
214 #define lli_opendir_key u.d.d_opendir_key
215 #define lli_sai u.d.d_sai
216 #define lli_def_acl u.d.d_def_acl
217 #define lli_sa_lock u.d.d_sa_lock
218 #define lli_opendir_pid u.d.d_opendir_pid
219 #define lli_lsm_md u.d.d_lsm_md
220 #define lli_stripe_dir_size u.d.d_stripe_size
221 #define lli_stripe_dir_nlink u.d.d_stripe_nlink
223 /* for non-directory */
225 struct semaphore f_size_sem;
226 void *f_size_sem_owner;
227 char *f_symlink_name;
230 * struct rw_semaphore {
231 * signed long count; // align d.d_def_acl
232 * spinlock_t wait_lock; // align d.d_sa_lock
233 * struct list_head wait_list;
236 struct rw_semaphore f_trunc_sem;
237 struct mutex f_write_mutex;
239 struct rw_semaphore f_glimpse_sem;
240 cfs_time_t f_glimpse_time;
241 cfs_list_t f_agl_list;
244 /* for writepage() only to communicate to fsync */
247 /* volatile file criteria is based on file name, this
248 * flag is used to keep the test result, so the strcmp
253 * whenever a process try to read/write the file, the
254 * jobid of the process will be saved here, and it'll
255 * be packed into the write PRC when flush later.
257 * so the read/write statistics for jobid will not be
258 * accurate if the file is shared by different jobs.
260 char f_jobid[JOBSTATS_JOBID_SIZE];
263 #define lli_size_sem u.f.f_size_sem
264 #define lli_size_sem_owner u.f.f_size_sem_owner
265 #define lli_symlink_name u.f.f_symlink_name
266 #define lli_maxbytes u.f.f_maxbytes
267 #define lli_trunc_sem u.f.f_trunc_sem
268 #define lli_write_mutex u.f.f_write_mutex
269 #define lli_glimpse_sem u.f.f_glimpse_sem
270 #define lli_glimpse_time u.f.f_glimpse_time
271 #define lli_agl_list u.f.f_agl_list
272 #define lli_agl_index u.f.f_agl_index
273 #define lli_async_rc u.f.f_async_rc
274 #define lli_jobid u.f.f_jobid
275 #define lli_volatile u.f.f_volatile
279 /* XXX: For following frequent used members, although they maybe special
280 * used for non-directory object, it is some time-wasting to check
281 * whether the object is directory or not before using them. On the
282 * other hand, currently, sizeof(f) > sizeof(d), it cannot reduce
283 * the "ll_inode_info" size even if moving those members into u.f.
284 * So keep them out side.
286 * In the future, if more members are added only for directory,
287 * some of the following members can be moved into u.f.
290 struct cl_object *lli_clob;
292 /* mutex to request for layout lock exclusively. */
293 struct mutex lli_layout_mutex;
294 /* valid only inside LAYOUT ibits lock, protected by lli_layout_mutex */
295 __u32 lli_layout_gen;
297 struct rw_semaphore lli_xattrs_list_rwsem;
298 struct mutex lli_xattrs_enq_lock;
299 struct list_head lli_xattrs; /* ll_xattr_entry->xe_list */
302 int ll_xattr_cache_destroy(struct inode *inode);
304 int ll_xattr_cache_get(struct inode *inode,
311 * Locking to guarantee consistency of non-atomic updates to long long i_size,
312 * consistency between file size and KMS.
314 * Implemented by ->lli_size_sem and ->lsm_lock, nested in that order.
317 void ll_inode_size_lock(struct inode *inode);
318 void ll_inode_size_unlock(struct inode *inode);
320 // FIXME: replace the name of this with LL_I to conform to kernel stuff
321 // static inline struct ll_inode_info *LL_I(struct inode *inode)
322 static inline struct ll_inode_info *ll_i2info(struct inode *inode)
324 return container_of(inode, struct ll_inode_info, lli_vfs_inode);
327 /* default to about 40meg of readahead on a given system. That much tied
328 * up in 512k readahead requests serviced at 40ms each is about 1GB/s. */
329 #define SBI_DEFAULT_READAHEAD_MAX (40UL << (20 - PAGE_CACHE_SHIFT))
331 /* default to read-ahead full files smaller than 2MB on the second read */
332 #define SBI_DEFAULT_READAHEAD_WHOLE_MAX (2UL << (20 - PAGE_CACHE_SHIFT))
337 RA_STAT_DISTANT_READPAGE,
338 RA_STAT_MISS_IN_WINDOW,
339 RA_STAT_FAILED_GRAB_PAGE,
340 RA_STAT_FAILED_MATCH,
345 RA_STAT_MAX_IN_FLIGHT,
346 RA_STAT_WRONG_GRAB_PAGE,
347 RA_STAT_FAILED_REACH_END,
352 cfs_atomic_t ra_cur_pages;
353 unsigned long ra_max_pages;
354 unsigned long ra_max_pages_per_file;
355 unsigned long ra_max_read_ahead_whole_pages;
358 /* ra_io_arg will be filled in the beginning of ll_readahead with
359 * ras_lock, then the following ll_read_ahead_pages will read RA
360 * pages according to this arg, all the items in this structure are
361 * counted by page index.
364 unsigned long ria_start; /* start offset of read-ahead*/
365 unsigned long ria_end; /* end offset of read-ahead*/
366 /* If stride read pattern is detected, ria_stoff means where
367 * stride read is started. Note: for normal read-ahead, the
368 * value here is meaningless, and also it will not be accessed*/
370 /* ria_length and ria_pages are the length and pages length in the
371 * stride I/O mode. And they will also be used to check whether
372 * it is stride I/O read-ahead in the read-ahead pages*/
373 unsigned long ria_length;
374 unsigned long ria_pages;
377 /* LL_HIST_MAX=32 causes an overflow */
378 #define LL_HIST_MAX 28
379 #define LL_HIST_START 12 /* buckets start at 2^12 = 4k */
380 #define LL_PROCESS_HIST_MAX 10
381 struct per_process_info {
383 struct obd_histogram pp_r_hist;
384 struct obd_histogram pp_w_hist;
387 /* pp_extents[LL_PROCESS_HIST_MAX] will hold the combined process info */
388 struct ll_rw_extents_info {
389 struct per_process_info pp_extents[LL_PROCESS_HIST_MAX + 1];
392 #define LL_OFFSET_HIST_MAX 100
393 struct ll_rw_process_info {
396 loff_t rw_range_start;
398 loff_t rw_last_file_pos;
400 size_t rw_smallest_extent;
401 size_t rw_largest_extent;
402 struct ll_file_data *rw_last_file;
405 enum stats_track_type {
406 STATS_TRACK_ALL = 0, /* track all processes */
407 STATS_TRACK_PID, /* track process with this pid */
408 STATS_TRACK_PPID, /* track processes with this ppid */
409 STATS_TRACK_GID, /* track processes with this gid */
413 /* flags for sbi->ll_flags */
414 #define LL_SBI_NOLCK 0x01 /* DLM locking disabled (directio-only) */
415 #define LL_SBI_CHECKSUM 0x02 /* checksum each page as it's written */
416 #define LL_SBI_FLOCK 0x04
417 #define LL_SBI_USER_XATTR 0x08 /* support user xattr */
418 #define LL_SBI_ACL 0x10 /* support ACL */
419 #define LL_SBI_RMT_CLIENT 0x40 /* remote client */
420 #define LL_SBI_MDS_CAPA 0x80 /* support mds capa */
421 #define LL_SBI_OSS_CAPA 0x100 /* support oss capa */
422 #define LL_SBI_LOCALFLOCK 0x200 /* Local flocks support by kernel */
423 #define LL_SBI_LRU_RESIZE 0x400 /* lru resize support */
424 #define LL_SBI_LAZYSTATFS 0x800 /* lazystatfs mount option */
425 #define LL_SBI_SOM_PREVIEW 0x1000 /* SOM preview mount option */
426 #define LL_SBI_32BIT_API 0x2000 /* generate 32 bit inodes. */
427 #define LL_SBI_64BIT_HASH 0x4000 /* support 64-bits dir hash/offset */
428 #define LL_SBI_AGL_ENABLED 0x8000 /* enable agl */
429 #define LL_SBI_VERBOSE 0x10000 /* verbose mount/umount */
430 #define LL_SBI_LAYOUT_LOCK 0x20000 /* layout lock support */
431 #define LL_SBI_USER_FID2PATH 0x40000 /* allow fid2path by unprivileged users */
432 #define LL_SBI_XATTR_CACHE 0x80000 /* support for xattr cache */
434 #define LL_SBI_FLAGS { \
457 /* default value for ll_sb_info->contention_time */
458 #define SBI_DEFAULT_CONTENTION_SECONDS 60
459 /* default value for lockless_truncate_enable */
460 #define SBI_DEFAULT_LOCKLESS_TRUNCATE_ENABLE 1
461 #define RCE_HASHES 32
463 struct rmtacl_ctl_entry {
465 pid_t rce_key; /* hash key */
466 int rce_ops; /* acl operation type */
469 struct rmtacl_ctl_table {
471 cfs_list_t rct_entries[RCE_HASHES];
478 pid_t ee_key; /* hash key */
479 struct lu_fid ee_fid;
480 int ee_type; /* ACL type for ACCESS or DEFAULT */
481 ext_acl_xattr_header *ee_acl;
486 cfs_list_t et_entries[EE_HASHES];
491 /* this protects pglist and ra_info. It isn't safe to
492 * grab from interrupt contexts */
494 spinlock_t ll_pp_extent_lock; /* pp_extent entry*/
495 spinlock_t ll_process_lock; /* ll_rw_process_info */
496 struct obd_uuid ll_sb_uuid;
497 struct obd_export *ll_md_exp;
498 struct obd_export *ll_dt_exp;
499 struct proc_dir_entry* ll_proc_root;
500 struct lu_fid ll_root_fid; /* root object fid */
503 unsigned int ll_umounting:1,
504 ll_xattr_cache_enabled:1;
505 cfs_list_t ll_conn_chain; /* per-conn chain of SBs */
506 struct lustre_client_ocd ll_lco;
508 cfs_list_t ll_orphan_dentry_list; /*please don't ask -p*/
509 struct ll_close_queue *ll_lcq;
511 struct lprocfs_stats *ll_stats; /* lprocfs stats counter */
513 /* Used to track "unstable" pages on a client, and maintain a
514 * LRU list of clean pages. An "unstable" page is defined as
515 * any page which is sent to a server as part of a bulk request,
516 * but is uncommitted to stable storage. */
517 struct cl_client_cache ll_cache;
519 struct lprocfs_stats *ll_ra_stats;
521 struct ll_ra_info ll_ra_info;
522 unsigned int ll_namelen;
523 struct file_operations *ll_fop;
525 /* =0 - hold lock over whole read/write
526 * >0 - max. chunk to be read/written w/o lock re-acquiring */
527 unsigned long ll_max_rw_chunk;
528 unsigned int ll_md_brw_size; /* used by readdir */
530 struct lu_site *ll_site;
531 struct cl_device *ll_cl;
533 struct ll_rw_extents_info ll_rw_extents_info;
534 int ll_extent_process_count;
535 struct ll_rw_process_info ll_rw_process_info[LL_PROCESS_HIST_MAX];
536 unsigned int ll_offset_process_count;
537 struct ll_rw_process_info ll_rw_offset_info[LL_OFFSET_HIST_MAX];
538 unsigned int ll_rw_offset_entry_count;
539 int ll_stats_track_id;
540 enum stats_track_type ll_stats_track_type;
543 /* metadata stat-ahead */
544 unsigned int ll_sa_max; /* max statahead RPCs */
545 atomic_t ll_sa_total; /* statahead thread started
547 atomic_t ll_sa_wrong; /* statahead thread stopped for
549 atomic_t ll_agl_total; /* AGL thread started count */
551 dev_t ll_sdev_orig; /* save s_dev before assign for
553 struct rmtacl_ctl_table ll_rct;
554 struct eacl_table ll_et;
557 #define LL_DEFAULT_MAX_RW_CHUNK (32 * 1024 * 1024)
562 struct task_struct *lrr_reader;
563 cfs_list_t lrr_linkage;
567 * per file-descriptor read-ahead data.
569 struct ll_readahead_state {
572 * index of the last page that read(2) needed and that wasn't in the
573 * cache. Used by ras_update() to detect seeks.
575 * XXX nikita: if access seeks into cached region, Lustre doesn't see
578 unsigned long ras_last_readpage;
580 * number of pages read after last read-ahead window reset. As window
581 * is reset on each seek, this is effectively a number of consecutive
582 * accesses. Maybe ->ras_accessed_in_window is better name.
584 * XXX nikita: window is also reset (by ras_update()) when Lustre
585 * believes that memory pressure evicts read-ahead pages. In that
586 * case, it probably doesn't make sense to expand window to
587 * PTLRPC_MAX_BRW_PAGES on the third access.
589 unsigned long ras_consecutive_pages;
591 * number of read requests after the last read-ahead window reset
592 * As window is reset on each seek, this is effectively the number
593 * on consecutive read request and is used to trigger read-ahead.
595 unsigned long ras_consecutive_requests;
597 * Parameters of current read-ahead window. Handled by
598 * ras_update(). On the initial access to the file or after a seek,
599 * window is reset to 0. After 3 consecutive accesses, window is
600 * expanded to PTLRPC_MAX_BRW_PAGES. Afterwards, window is enlarged by
601 * PTLRPC_MAX_BRW_PAGES chunks up to ->ra_max_pages.
603 unsigned long ras_window_start, ras_window_len;
605 * Where next read-ahead should start at. This lies within read-ahead
606 * window. Read-ahead window is read in pieces rather than at once
607 * because: 1. lustre limits total number of pages under read-ahead by
608 * ->ra_max_pages (see ll_ra_count_get()), 2. client cannot read pages
609 * not covered by DLM lock.
611 unsigned long ras_next_readahead;
613 * Total number of ll_file_read requests issued, reads originating
614 * due to mmap are not counted in this total. This value is used to
615 * trigger full file read-ahead after multiple reads to a small file.
617 unsigned long ras_requests;
619 * Page index with respect to the current request, these value
620 * will not be accurate when dealing with reads issued via mmap.
622 unsigned long ras_request_index;
624 * list of struct ll_ra_read's one per read(2) call current in
625 * progress against this file descriptor. Used by read-ahead code,
626 * protected by ->ras_lock.
628 cfs_list_t ras_read_beads;
630 * The following 3 items are used for detecting the stride I/O
632 * In stride I/O mode,
633 * ...............|-----data-----|****gap*****|--------|******|....
634 * offset |-stride_pages-|-stride_gap-|
635 * ras_stride_offset = offset;
636 * ras_stride_length = stride_pages + stride_gap;
637 * ras_stride_pages = stride_pages;
638 * Note: all these three items are counted by pages.
640 unsigned long ras_stride_length;
641 unsigned long ras_stride_pages;
642 pgoff_t ras_stride_offset;
644 * number of consecutive stride request count, and it is similar as
645 * ras_consecutive_requests, but used for stride I/O mode.
646 * Note: only more than 2 consecutive stride request are detected,
647 * stride read-ahead will be enable
649 unsigned long ras_consecutive_stride_requests;
652 extern struct kmem_cache *ll_file_data_slab;
653 struct lustre_handle;
654 struct ll_file_data {
655 struct ll_readahead_state fd_ras;
656 struct ccc_grouplock fd_grouplock;
660 /* openhandle if lease exists for this file.
661 * Borrow lli->lli_och_mutex to protect assignment */
662 struct obd_client_handle *fd_lease_och;
663 struct obd_client_handle *fd_och;
664 struct file *fd_file;
665 /* Indicate whether need to report failure when close.
666 * true: failure is known, not report again.
667 * false: unknown failure, should report. */
668 bool fd_write_failed;
671 struct lov_stripe_md;
673 extern spinlock_t inode_lock;
675 extern struct proc_dir_entry *proc_lustre_fs_root;
677 static inline struct inode *ll_info2i(struct ll_inode_info *lli)
679 return &lli->lli_vfs_inode;
683 struct inode *icbd_parent;
684 struct dentry **icbd_childp;
688 __u32 ll_i2suppgid(struct inode *i);
689 void ll_i2gids(__u32 *suppgids, struct inode *i1,struct inode *i2);
691 static inline int ll_need_32bit_api(struct ll_sb_info *sbi)
693 #if BITS_PER_LONG == 32
700 (sbi->ll_flags & LL_SBI_32BIT_API)
705 #define LLAP_MAGIC 98764321
707 extern struct kmem_cache *ll_async_page_slab;
708 extern size_t ll_async_page_slab_size;
710 void ll_ra_read_in(struct file *f, struct ll_ra_read *rar);
711 void ll_ra_read_ex(struct file *f, struct ll_ra_read *rar);
712 struct ll_ra_read *ll_ra_read_get(struct file *f);
714 /* llite/lproc_llite.c */
716 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
717 struct super_block *sb, char *osc, char *mdc);
718 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi);
719 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count);
720 extern struct lprocfs_seq_vars lprocfs_llite_obd_vars[];
722 static inline int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
723 struct super_block *sb, char *osc, char *mdc){return 0;}
724 static inline void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi) {}
725 static void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count) {}
730 extern struct file_operations ll_dir_operations;
731 extern struct inode_operations ll_dir_inode_operations;
732 #ifdef HAVE_DIR_CONTEXT
733 int ll_dir_read(struct inode *inode, struct md_op_data *op_data,
734 struct dir_context *ctx);
736 int ll_dir_read(struct inode *inode, struct md_op_data *op_data,
737 void *cookie, filldir_t filldir);
739 int ll_get_mdt_idx(struct inode *inode);
740 int ll_get_mdt_idx_by_fid(struct ll_sb_info *sbi, const struct lu_fid *fid);
742 struct lu_dirent *ll_dir_entry_start(struct inode *dir,
743 struct md_op_data *op_data,
744 struct page **ppage);
746 struct lu_dirent *ll_dir_entry_next(struct inode *dir,
747 struct md_op_data *op_data,
748 struct lu_dirent *ent,
749 struct page **ppage);
751 int ll_objects_destroy(struct ptlrpc_request *request,
753 struct inode *ll_iget(struct super_block *sb, ino_t hash,
754 struct lustre_md *lic);
755 int ll_test_inode_by_fid(struct inode *inode, void *opaque);
756 int ll_md_blocking_ast(struct ldlm_lock *, struct ldlm_lock_desc *,
757 void *data, int flag);
758 #ifndef HAVE_IOP_ATOMIC_OPEN
759 struct lookup_intent *ll_convert_intent(struct open_intent *oit,
762 struct dentry *ll_splice_alias(struct inode *inode, struct dentry *de);
763 int ll_rmdir_entry(struct inode *dir, char *name, int namelen);
764 int ll_d_mountpoint(struct dentry *dparent, struct dentry *dchild,
766 void ll_update_times(struct ptlrpc_request *request, struct inode *inode);
769 int ll_writepage(struct page *page, struct writeback_control *wbc);
770 int ll_writepages(struct address_space *, struct writeback_control *wbc);
771 void ll_removepage(struct page *page);
772 int ll_readpage(struct file *file, struct page *page);
773 void ll_readahead_init(struct inode *inode, struct ll_readahead_state *ras);
774 int ll_file_punch(struct inode *, loff_t, int);
775 ssize_t ll_file_lockless_io(struct file *, char *, size_t, loff_t *, int);
776 void ll_clear_file_contended(struct inode*);
777 int ll_sync_page_range(struct inode *, struct address_space *, loff_t, size_t);
778 int ll_readahead(const struct lu_env *env, struct cl_io *io,
779 struct cl_page_list *queue, struct ll_readahead_state *ras,
781 int vvp_io_write_commit(const struct lu_env *env, struct cl_io *io);
782 struct ll_cl_context *ll_cl_init(struct file *file, struct page *vmpage);
783 void ll_cl_fini(struct ll_cl_context *lcc);
786 extern struct file_operations ll_file_operations;
787 extern struct file_operations ll_file_operations_flock;
788 extern struct file_operations ll_file_operations_noflock;
789 extern struct inode_operations ll_file_inode_operations;
790 extern int ll_inode_revalidate_it(struct dentry *, struct lookup_intent *,
792 extern int ll_have_md_lock(struct inode *inode, __u64 *bits,
793 ldlm_mode_t l_req_mode);
794 extern ldlm_mode_t ll_take_md_lock(struct inode *inode, __u64 bits,
795 struct lustre_handle *lockh, __u64 flags,
797 int __ll_inode_revalidate_it(struct dentry *, struct lookup_intent *,
799 #ifdef HAVE_IOP_ATOMIC_OPEN
800 int ll_revalidate_nd(struct dentry *dentry, unsigned int flags);
802 int ll_revalidate_nd(struct dentry *dentry, struct nameidata *nd);
804 int ll_file_open(struct inode *inode, struct file *file);
805 int ll_file_release(struct inode *inode, struct file *file);
806 int ll_glimpse_ioctl(struct ll_sb_info *sbi,
807 struct lov_stripe_md *lsm, lstat_t *st);
808 void ll_ioepoch_open(struct ll_inode_info *lli, __u64 ioepoch);
809 int ll_local_open(struct file *file,
810 struct lookup_intent *it, struct ll_file_data *fd,
811 struct obd_client_handle *och);
812 int ll_release_openhandle(struct dentry *, struct lookup_intent *);
813 int ll_md_close(struct obd_export *md_exp, struct inode *inode,
815 int ll_md_real_close(struct inode *inode, fmode_t fmode);
816 void ll_ioepoch_close(struct inode *inode, struct md_op_data *op_data,
817 struct obd_client_handle **och, unsigned long flags);
818 void ll_done_writing_attr(struct inode *inode, struct md_op_data *op_data);
819 int ll_som_update(struct inode *inode, struct md_op_data *op_data);
820 int ll_inode_getattr(struct inode *inode, struct obdo *obdo,
821 __u64 ioepoch, int sync);
822 int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data,
823 struct md_open_data **mod);
824 void ll_pack_inode2opdata(struct inode *inode, struct md_op_data *op_data,
825 struct lustre_handle *fh);
826 extern void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
827 struct ll_file_data *file, loff_t pos,
828 size_t count, int rw);
829 int ll_getattr_it(struct vfsmount *mnt, struct dentry *de,
830 struct lookup_intent *it, struct kstat *stat);
831 int ll_getattr(struct vfsmount *mnt, struct dentry *de, struct kstat *stat);
832 struct ll_file_data *ll_file_data_get(void);
833 struct posix_acl * ll_get_acl(struct inode *inode, int type);
834 int ll_migrate(struct inode *parent, struct file *file, int mdtidx,
835 const char *name, int namelen);
836 int ll_get_fid_by_name(struct inode *parent, const char *name,
837 int namelen, struct lu_fid *fid);
838 #ifdef HAVE_GENERIC_PERMISSION_4ARGS
839 int ll_inode_permission(struct inode *inode, int mask, unsigned int flags);
841 # ifndef HAVE_INODE_PERMISION_2ARGS
842 int ll_inode_permission(struct inode *inode, int mask, struct nameidata *nd);
844 int ll_inode_permission(struct inode *inode, int mask);
848 int ll_lov_setstripe_ea_info(struct inode *inode, struct file *file,
849 __u64 flags, struct lov_user_md *lum,
851 int ll_lov_getstripe_ea_info(struct inode *inode, const char *filename,
852 struct lov_mds_md **lmm, int *lmm_size,
853 struct ptlrpc_request **request);
854 int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump,
856 int ll_dir_getstripe(struct inode *inode, void **lmmp,
857 int *lmm_size, struct ptlrpc_request **request,
859 #ifdef HAVE_FILE_FSYNC_4ARGS
860 int ll_fsync(struct file *file, loff_t start, loff_t end, int data);
861 #elif defined(HAVE_FILE_FSYNC_2ARGS)
862 int ll_fsync(struct file *file, int data);
864 int ll_fsync(struct file *file, struct dentry *dentry, int data);
866 int ll_do_fiemap(struct inode *inode, struct ll_user_fiemap *fiemap,
868 int ll_merge_lvb(const struct lu_env *env, struct inode *inode);
869 int ll_get_grouplock(struct inode *inode, struct file *file, unsigned long arg);
870 int ll_put_grouplock(struct inode *inode, struct file *file, unsigned long arg);
871 int ll_fid2path(struct inode *inode, void *arg);
872 int ll_data_version(struct inode *inode, __u64 *data_version, int flags);
873 int ll_hsm_release(struct inode *inode);
875 struct obd_client_handle *ll_lease_open(struct inode *inode, struct file *file,
876 fmode_t mode, __u64 flags);
877 int ll_lease_close(struct obd_client_handle *och, struct inode *inode,
882 int ll_d_init(struct dentry *de);
883 extern struct dentry_operations ll_d_ops;
884 void ll_intent_drop_lock(struct lookup_intent *);
885 void ll_intent_release(struct lookup_intent *);
886 void ll_invalidate_aliases(struct inode *);
887 void ll_frob_intent(struct lookup_intent **itp, struct lookup_intent *deft);
888 void ll_lookup_finish_locks(struct lookup_intent *it, struct dentry *dentry);
889 int ll_revalidate_it_finish(struct ptlrpc_request *request,
890 struct lookup_intent *it, struct dentry *de);
892 /* llite/llite_lib.c */
893 extern struct super_operations lustre_super_operations;
895 char *ll_read_opt(const char *opt, char *data);
896 void ll_lli_init(struct ll_inode_info *lli);
897 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt);
898 void ll_put_super(struct super_block *sb);
899 void ll_kill_super(struct super_block *sb);
900 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock);
901 struct inode *ll_inode_from_lock(struct ldlm_lock *lock);
902 void ll_clear_inode(struct inode *inode);
903 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr, bool hsm_import);
904 int ll_setattr(struct dentry *de, struct iattr *attr);
905 int ll_statfs(struct dentry *de, struct kstatfs *sfs);
906 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
907 __u64 max_age, __u32 flags);
908 void ll_update_inode(struct inode *inode, struct lustre_md *md);
909 void ll_read_inode2(struct inode *inode, void *opaque);
910 void ll_delete_inode(struct inode *inode);
911 int ll_iocontrol(struct inode *inode, struct file *file,
912 unsigned int cmd, unsigned long arg);
913 int ll_flush_ctx(struct inode *inode);
914 void ll_umount_begin(struct super_block *sb);
915 int ll_remount_fs(struct super_block *sb, int *flags, char *data);
916 #ifdef HAVE_SUPEROPS_USE_DENTRY
917 int ll_show_options(struct seq_file *seq, struct dentry *dentry);
919 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs);
921 void ll_dirty_page_discard_warn(struct page *page, int ioret);
922 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
923 struct super_block *, struct lookup_intent *);
924 void lustre_dump_dentry(struct dentry *, int recur);
925 void lustre_dump_inode(struct inode *);
926 int ll_obd_statfs(struct inode *inode, void *arg);
927 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *max_mdsize);
928 int ll_process_config(struct lustre_cfg *lcfg);
929 struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
930 struct inode *i1, struct inode *i2,
931 const char *name, int namelen,
932 int mode, __u32 opc, void *data);
933 void ll_finish_md_op_data(struct md_op_data *op_data);
934 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg);
935 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen);
937 /* llite/llite_nfs.c */
938 extern struct export_operations lustre_export_operations;
939 __u32 get_uuid2int(const char *name, int len);
940 struct inode *search_inode_for_lustre(struct super_block *sb,
941 const struct lu_fid *fid);
943 /* llite/special.c */
944 extern struct inode_operations ll_special_inode_operations;
945 extern struct file_operations ll_special_chr_inode_fops;
946 extern struct file_operations ll_special_chr_file_fops;
947 extern struct file_operations ll_special_blk_inode_fops;
948 extern struct file_operations ll_special_fifo_inode_fops;
949 extern struct file_operations ll_special_fifo_file_fops;
950 extern struct file_operations ll_special_sock_inode_fops;
952 /* llite/symlink.c */
953 extern struct inode_operations ll_fast_symlink_inode_operations;
955 /* llite/llite_close.c */
956 struct ll_close_queue {
959 wait_queue_head_t lcq_waitq;
960 struct completion lcq_comp;
961 cfs_atomic_t lcq_stop;
964 struct ccc_object *cl_inode2ccc(struct inode *inode);
967 void vvp_write_pending (struct ccc_object *club, struct ccc_page *page);
968 void vvp_write_complete(struct ccc_object *club, struct ccc_page *page);
970 /* specific achitecture can implement only part of this list */
971 enum vvp_io_subtype {
974 /** io called from .sendfile */
976 /** io started from splice_{read|write} */
983 enum vvp_io_subtype cui_io_subtype;
987 read_actor_t cui_actor;
991 struct pipe_inode_info *cui_pipe;
992 unsigned int cui_flags;
994 struct vvp_fault_io {
996 * Inode modification time that is checked across DLM
1000 struct vm_area_struct *ft_vma;
1002 * locked page returned from vvp_io
1004 struct page *ft_vmpage;
1005 struct vm_fault_api {
1009 struct vm_fault *ft_vmf;
1011 * fault API used bitflags for return code.
1013 unsigned int ft_flags;
1018 * Read-ahead state used by read and page-fault IO contexts.
1020 struct ll_ra_read cui_bead;
1022 * Set when cui_bead has been initialized.
1024 int cui_ra_window_set;
1026 * Partially truncated page, that vvp_io_trunc_start() keeps locked
1029 struct cl_page *cui_partpage;
1033 * IO arguments for various VFS I/O interfaces.
1035 struct vvp_io_args {
1036 /** normal/sendfile/splice */
1037 enum vvp_io_subtype via_io_subtype;
1041 struct kiocb *via_iocb;
1042 struct iovec *via_iov;
1043 unsigned long via_nrsegs;
1046 read_actor_t via_actor;
1050 struct pipe_inode_info *via_pipe;
1051 unsigned int via_flags;
1056 struct ll_cl_context {
1058 struct cl_io *lcc_io;
1059 struct cl_page *lcc_page;
1060 struct lu_env *lcc_env;
1065 struct vvp_thread_info {
1066 struct ost_lvb vti_lvb;
1067 struct cl_2queue vti_queue;
1068 struct iovec vti_local_iov;
1069 struct vvp_io_args vti_args;
1070 struct ra_io_arg vti_ria;
1071 struct kiocb vti_kiocb;
1072 struct ll_cl_context vti_io_ctx;
1075 static inline struct vvp_thread_info *vvp_env_info(const struct lu_env *env)
1077 extern struct lu_context_key vvp_key;
1078 struct vvp_thread_info *info;
1080 info = lu_context_key_get(&env->le_ctx, &vvp_key);
1081 LASSERT(info != NULL);
1085 static inline struct vvp_io_args *vvp_env_args(const struct lu_env *env,
1086 enum vvp_io_subtype type)
1088 struct vvp_io_args *ret = &vvp_env_info(env)->vti_args;
1090 ret->via_io_subtype = type;
1095 struct vvp_session {
1096 struct vvp_io vs_ios;
1099 static inline struct vvp_session *vvp_env_session(const struct lu_env *env)
1101 extern struct lu_context_key vvp_session_key;
1102 struct vvp_session *ses;
1104 ses = lu_context_key_get(env->le_ses, &vvp_session_key);
1105 LASSERT(ses != NULL);
1109 static inline struct vvp_io *vvp_env_io(const struct lu_env *env)
1111 return &vvp_env_session(env)->vs_ios;
1114 void ll_queue_done_writing(struct inode *inode, unsigned long flags);
1115 void ll_close_thread_shutdown(struct ll_close_queue *lcq);
1116 int ll_close_thread_start(struct ll_close_queue **lcq_ret);
1118 /* llite/llite_mmap.c */
1119 typedef struct rb_root rb_root_t;
1120 typedef struct rb_node rb_node_t;
1122 struct ll_lock_tree_node;
1123 struct ll_lock_tree {
1125 cfs_list_t lt_locked_list;
1126 struct ll_file_data *lt_fd;
1129 int ll_teardown_mmaps(struct address_space *mapping, __u64 first, __u64 last);
1130 int ll_file_mmap(struct file * file, struct vm_area_struct * vma);
1131 struct ll_lock_tree_node * ll_node_from_inode(struct inode *inode, __u64 start,
1132 __u64 end, ldlm_mode_t mode);
1133 void policy_from_vma(ldlm_policy_data_t *policy,
1134 struct vm_area_struct *vma, unsigned long addr, size_t count);
1135 struct vm_area_struct *our_vma(struct mm_struct *mm, unsigned long addr,
1138 static inline void ll_invalidate_page(struct page *vmpage)
1140 struct address_space *mapping = vmpage->mapping;
1141 loff_t offset = vmpage->index << PAGE_CACHE_SHIFT;
1143 LASSERT(PageLocked(vmpage));
1144 if (mapping == NULL)
1148 * truncate_complete_page() calls
1149 * a_ops->invalidatepage()->cl_page_delete()->vvp_page_delete().
1151 ll_teardown_mmaps(mapping, offset, offset + PAGE_CACHE_SIZE);
1152 truncate_complete_page(mapping, vmpage);
1155 #define ll_s2sbi(sb) (s2lsi(sb)->lsi_llsbi)
1157 /* don't need an addref as the sb_info should be holding one */
1158 static inline struct obd_export *ll_s2dtexp(struct super_block *sb)
1160 return ll_s2sbi(sb)->ll_dt_exp;
1163 /* don't need an addref as the sb_info should be holding one */
1164 static inline struct obd_export *ll_s2mdexp(struct super_block *sb)
1166 return ll_s2sbi(sb)->ll_md_exp;
1169 static inline struct client_obd *sbi2mdc(struct ll_sb_info *sbi)
1171 struct obd_device *obd = sbi->ll_md_exp->exp_obd;
1177 // FIXME: replace the name of this with LL_SB to conform to kernel stuff
1178 static inline struct ll_sb_info *ll_i2sbi(struct inode *inode)
1180 return ll_s2sbi(inode->i_sb);
1183 static inline struct obd_export *ll_i2dtexp(struct inode *inode)
1185 return ll_s2dtexp(inode->i_sb);
1188 static inline struct obd_export *ll_i2mdexp(struct inode *inode)
1190 return ll_s2mdexp(inode->i_sb);
1193 static inline struct lu_fid *ll_inode2fid(struct inode *inode)
1197 LASSERT(inode != NULL);
1198 fid = &ll_i2info(inode)->lli_fid;
1203 static inline int ll_mds_max_easize(struct super_block *sb)
1205 return sbi2mdc(ll_s2sbi(sb))->cl_max_mds_easize;
1208 static inline __u64 ll_file_maxbytes(struct inode *inode)
1210 return ll_i2info(inode)->lli_maxbytes;
1214 int ll_setxattr(struct dentry *dentry, const char *name,
1215 const void *value, size_t size, int flags);
1216 ssize_t ll_getxattr(struct dentry *dentry, const char *name,
1217 void *buffer, size_t size);
1218 ssize_t ll_listxattr(struct dentry *dentry, char *buffer, size_t size);
1219 int ll_removexattr(struct dentry *dentry, const char *name);
1221 /* llite/remote_perm.c */
1222 extern struct kmem_cache *ll_remote_perm_cachep;
1223 extern struct kmem_cache *ll_rmtperm_hash_cachep;
1225 cfs_hlist_head_t *alloc_rmtperm_hash(void);
1226 void free_rmtperm_hash(cfs_hlist_head_t *hash);
1227 int ll_update_remote_perm(struct inode *inode, struct mdt_remote_perm *perm);
1228 int lustre_check_remote_perm(struct inode *inode, int mask);
1230 /* llite/llite_capa.c */
1231 extern struct timer_list ll_capa_timer;
1233 int ll_capa_thread_start(void);
1234 void ll_capa_thread_stop(void);
1235 void ll_capa_timer_callback(unsigned long unused);
1237 struct obd_capa *ll_add_capa(struct inode *inode, struct obd_capa *ocapa);
1238 int ll_update_capa(struct obd_capa *ocapa, struct lustre_capa *capa);
1240 void ll_capa_open(struct inode *inode);
1241 void ll_capa_close(struct inode *inode);
1243 struct obd_capa *ll_mdscapa_get(struct inode *inode);
1244 struct obd_capa *ll_osscapa_get(struct inode *inode, __u64 opc);
1246 void ll_truncate_free_capa(struct obd_capa *ocapa);
1247 void ll_clear_inode_capas(struct inode *inode);
1248 void ll_print_capa_stat(struct ll_sb_info *sbi);
1250 /* llite/llite_cl.c */
1251 extern struct lu_device_type vvp_device_type;
1254 * Common IO arguments for various VFS I/O interfaces.
1256 int cl_sb_init(struct super_block *sb);
1257 int cl_sb_fini(struct super_block *sb);
1258 enum cl_lock_mode vvp_mode_from_vma(struct vm_area_struct *vma);
1259 void ll_io_init(struct cl_io *io, const struct file *file, int write);
1261 void ras_update(struct ll_sb_info *sbi, struct inode *inode,
1262 struct ll_readahead_state *ras, unsigned long index,
1264 void ll_ra_count_put(struct ll_sb_info *sbi, unsigned long len);
1265 int ll_is_file_contended(struct file *file);
1266 void ll_ra_stats_inc(struct inode *inode, enum ra_stat which);
1268 /* llite/llite_rmtacl.c */
1269 #ifdef CONFIG_FS_POSIX_ACL
1270 obd_valid rce_ops2valid(int ops);
1271 struct rmtacl_ctl_entry *rct_search(struct rmtacl_ctl_table *rct, pid_t key);
1272 int rct_add(struct rmtacl_ctl_table *rct, pid_t key, int ops);
1273 int rct_del(struct rmtacl_ctl_table *rct, pid_t key);
1274 void rct_init(struct rmtacl_ctl_table *rct);
1275 void rct_fini(struct rmtacl_ctl_table *rct);
1277 void ee_free(struct eacl_entry *ee);
1278 int ee_add(struct eacl_table *et, pid_t key, struct lu_fid *fid, int type,
1279 ext_acl_xattr_header *header);
1280 struct eacl_entry *et_search_del(struct eacl_table *et, pid_t key,
1281 struct lu_fid *fid, int type);
1282 void et_search_free(struct eacl_table *et, pid_t key);
1283 void et_init(struct eacl_table *et);
1284 void et_fini(struct eacl_table *et);
1289 #define LL_SA_RPC_MIN 2
1290 #define LL_SA_RPC_DEF 32
1291 #define LL_SA_RPC_MAX 8192
1293 #define LL_SA_CACHE_BIT 5
1294 #define LL_SA_CACHE_SIZE (1 << LL_SA_CACHE_BIT)
1295 #define LL_SA_CACHE_MASK (LL_SA_CACHE_SIZE - 1)
1297 /* per inode struct, for dir only */
1298 struct ll_statahead_info {
1299 struct inode *sai_inode;
1300 cfs_atomic_t sai_refcount; /* when access this struct, hold
1302 unsigned int sai_generation; /* generation for statahead */
1303 unsigned int sai_max; /* max ahead of lookup */
1304 __u64 sai_sent; /* stat requests sent count */
1305 __u64 sai_replied; /* stat requests which received
1307 __u64 sai_index; /* index of statahead entry */
1308 __u64 sai_index_wait; /* index of entry which is the
1309 * caller is waiting for */
1310 __u64 sai_hit; /* hit count */
1311 __u64 sai_miss; /* miss count:
1312 * for "ls -al" case, it includes
1313 * hidden dentry miss;
1314 * for "ls -l" case, it does not
1315 * include hidden dentry miss.
1316 * "sai_miss_hidden" is used for
1319 unsigned int sai_consecutive_miss; /* consecutive miss */
1320 unsigned int sai_miss_hidden;/* "ls -al", but first dentry
1321 * is not a hidden one */
1322 unsigned int sai_skip_hidden;/* skipped hidden dentry count */
1323 unsigned int sai_ls_all:1, /* "ls -al", do stat-ahead for
1325 sai_in_readpage:1,/* statahead is in readdir()*/
1326 sai_agl_valid:1;/* AGL is valid for the dir */
1327 wait_queue_head_t sai_waitq; /* stat-ahead wait queue */
1328 struct ptlrpc_thread sai_thread; /* stat-ahead thread */
1329 struct ptlrpc_thread sai_agl_thread; /* AGL thread */
1330 cfs_list_t sai_entries; /* entry list */
1331 cfs_list_t sai_entries_received; /* entries returned */
1332 cfs_list_t sai_entries_stated; /* entries stated */
1333 cfs_list_t sai_entries_agl; /* AGL entries to be sent */
1334 cfs_list_t sai_cache[LL_SA_CACHE_SIZE];
1335 spinlock_t sai_cache_lock[LL_SA_CACHE_SIZE];
1336 cfs_atomic_t sai_cache_count; /* entry count in cache */
1339 int do_statahead_enter(struct inode *dir, struct dentry **dentry,
1341 void ll_stop_statahead(struct inode *dir, void *key);
1343 static inline int ll_glimpse_size(struct inode *inode)
1345 struct ll_inode_info *lli = ll_i2info(inode);
1348 down_read(&lli->lli_glimpse_sem);
1349 rc = cl_glimpse_size(inode);
1350 lli->lli_glimpse_time = cfs_time_current();
1351 up_read(&lli->lli_glimpse_sem);
1356 ll_statahead_mark(struct inode *dir, struct dentry *dentry)
1358 struct ll_inode_info *lli = ll_i2info(dir);
1359 struct ll_statahead_info *sai = lli->lli_sai;
1360 struct ll_dentry_data *ldd = ll_d2d(dentry);
1362 /* not the same process, don't mark */
1363 if (lli->lli_opendir_pid != current_pid())
1366 LASSERT(ldd != NULL);
1368 ldd->lld_sa_generation = sai->sai_generation;
1372 d_need_statahead(struct inode *dir, struct dentry *dentryp)
1374 struct ll_inode_info *lli;
1375 struct ll_dentry_data *ldd;
1377 if (ll_i2sbi(dir)->ll_sa_max == 0)
1380 lli = ll_i2info(dir);
1381 /* not the same process, don't statahead */
1382 if (lli->lli_opendir_pid != current_pid())
1385 /* statahead has been stopped */
1386 if (lli->lli_opendir_key == NULL)
1389 ldd = ll_d2d(dentryp);
1391 * When stats a dentry, the system trigger more than once "revalidate"
1392 * or "lookup", for "getattr", for "getxattr", and maybe for others.
1393 * Under patchless client mode, the operation intent is not accurate,
1394 * which maybe misguide the statahead thread. For example:
1395 * The "revalidate" call for "getattr" and "getxattr" of a dentry maybe
1396 * have the same operation intent -- "IT_GETATTR".
1397 * In fact, one dentry should has only one chance to interact with the
1398 * statahead thread, otherwise the statahead windows will be confused.
1399 * The solution is as following:
1400 * Assign "lld_sa_generation" with "sai_generation" when a dentry
1401 * "IT_GETATTR" for the first time, and the subsequent "IT_GETATTR"
1402 * will bypass interacting with statahead thread for checking:
1403 * "lld_sa_generation == lli_sai->sai_generation"
1405 if (ldd && lli->lli_sai &&
1406 ldd->lld_sa_generation == lli->lli_sai->sai_generation)
1413 ll_statahead_enter(struct inode *dir, struct dentry **dentryp, int only_unplug)
1417 ret = d_need_statahead(dir, *dentryp);
1421 return do_statahead_enter(dir, dentryp, only_unplug);
1424 /* llite ioctl register support rountine */
1431 #define LLIOC_MAX_CMD 256
1434 * Rules to write a callback function:
1437 * @magic: Dynamic ioctl call routine will feed this vaule with the pointer
1438 * returned to ll_iocontrol_register. Callback functions should use this
1439 * data to check the potential collasion of ioctl cmd. If collasion is
1440 * found, callback function should return LLIOC_CONT.
1441 * @rcp: The result of ioctl command.
1444 * If @magic matches the pointer returned by ll_iocontrol_data, the
1445 * callback should return LLIOC_STOP; return LLIOC_STOP otherwise.
1447 typedef enum llioc_iter (*llioc_callback_t)(struct inode *inode,
1448 struct file *file, unsigned int cmd, unsigned long arg,
1449 void *magic, int *rcp);
1451 enum llioc_iter ll_iocontrol_call(struct inode *inode, struct file *file,
1452 unsigned int cmd, unsigned long arg, int *rcp);
1454 /* export functions */
1455 /* Register ioctl block dynamatically for a regular file.
1457 * @cmd: the array of ioctl command set
1458 * @count: number of commands in the @cmd
1459 * @cb: callback function, it will be called if an ioctl command is found to
1460 * belong to the command list @cmd.
1463 * A magic pointer will be returned if success;
1464 * otherwise, NULL will be returned.
1466 void *ll_iocontrol_register(llioc_callback_t cb, int count, unsigned int *cmd);
1467 void ll_iocontrol_unregister(void *magic);
1471 /* lclient compat stuff */
1472 #define cl_inode_info ll_inode_info
1473 #define cl_i2info(info) ll_i2info(info)
1474 #define cl_inode_mode(inode) ((inode)->i_mode)
1475 #define cl_i2sbi ll_i2sbi
1477 static inline struct ll_file_data *cl_iattr2fd(struct inode *inode,
1478 const struct iattr *attr)
1480 LASSERT(attr->ia_valid & ATTR_FILE);
1481 return LUSTRE_FPRIVATE(attr->ia_file);
1484 static inline void cl_isize_lock(struct inode *inode)
1486 ll_inode_size_lock(inode);
1489 static inline void cl_isize_unlock(struct inode *inode)
1491 ll_inode_size_unlock(inode);
1494 static inline void cl_isize_write_nolock(struct inode *inode, loff_t kms)
1496 LASSERT(down_trylock(&ll_i2info(inode)->lli_size_sem) != 0);
1497 i_size_write(inode, kms);
1500 static inline void cl_isize_write(struct inode *inode, loff_t kms)
1502 ll_inode_size_lock(inode);
1503 i_size_write(inode, kms);
1504 ll_inode_size_unlock(inode);
1507 #define cl_isize_read(inode) i_size_read(inode)
1509 static inline int cl_merge_lvb(const struct lu_env *env, struct inode *inode)
1511 return ll_merge_lvb(env, inode);
1514 #define cl_inode_atime(inode) LTIME_S((inode)->i_atime)
1515 #define cl_inode_ctime(inode) LTIME_S((inode)->i_ctime)
1516 #define cl_inode_mtime(inode) LTIME_S((inode)->i_mtime)
1518 struct obd_capa *cl_capa_lookup(struct inode *inode, enum cl_req_type crt);
1520 int cl_sync_file_range(struct inode *inode, loff_t start, loff_t end,
1521 enum cl_fsync_mode mode, int ignore_layout);
1523 /** direct write pages */
1524 struct ll_dio_pages {
1525 /** page array to be written. we don't support
1526 * partial pages except the last one. */
1527 struct page **ldp_pages;
1528 /* offset of each page */
1529 loff_t *ldp_offsets;
1530 /** if ldp_offsets is NULL, it means a sequential
1531 * pages to be written, then this is the file offset
1532 * of the * first page. */
1533 loff_t ldp_start_offset;
1534 /** how many bytes are to be written. */
1536 /** # of pages in the array. */
1540 static inline void cl_stats_tally(struct cl_device *dev, enum cl_req_type crt,
1543 int opc = (crt == CRT_READ) ? LPROC_LL_OSC_READ :
1546 ll_stats_ops_tally(ll_s2sbi(cl2ccc_dev(dev)->cdv_sb), opc, rc);
1549 extern ssize_t ll_direct_rw_pages(const struct lu_env *env, struct cl_io *io,
1550 int rw, struct inode *inode,
1551 struct ll_dio_pages *pv);
1553 static inline int ll_file_nolock(const struct file *file)
1555 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
1556 struct inode *inode = file->f_dentry->d_inode;
1558 LASSERT(fd != NULL);
1559 return ((fd->fd_flags & LL_FILE_IGNORE_LOCK) ||
1560 (ll_i2sbi(inode)->ll_flags & LL_SBI_NOLCK));
1563 static inline void ll_set_lock_data(struct obd_export *exp, struct inode *inode,
1564 struct lookup_intent *it, __u64 *bits)
1566 if (!it->d.lustre.it_lock_set) {
1567 struct lustre_handle handle;
1569 /* If this inode is a remote object, it will get two
1570 * separate locks in different namespaces, Master MDT,
1571 * where the name entry is, will grant LOOKUP lock,
1572 * remote MDT, where the object is, will grant
1573 * UPDATE|PERM lock. The inode will be attched to both
1574 * LOOKUP and PERM locks, so revoking either locks will
1575 * case the dcache being cleared */
1576 if (it->d.lustre.it_remote_lock_mode) {
1577 handle.cookie = it->d.lustre.it_remote_lock_handle;
1578 CDEBUG(D_DLMTRACE, "setting l_data to inode "DFID
1579 "(%p) for remote lock "LPX64"\n",
1580 PFID(ll_inode2fid(inode)), inode,
1582 md_set_lock_data(exp, &handle.cookie, inode, NULL);
1585 handle.cookie = it->d.lustre.it_lock_handle;
1587 CDEBUG(D_DLMTRACE, "setting l_data to inode "DFID"(%p)"
1588 " for lock "LPX64"\n",
1589 PFID(ll_inode2fid(inode)), inode, handle.cookie);
1591 md_set_lock_data(exp, &handle.cookie, inode,
1592 &it->d.lustre.it_lock_bits);
1593 it->d.lustre.it_lock_set = 1;
1597 *bits = it->d.lustre.it_lock_bits;
1600 static inline void ll_lock_dcache(struct inode *inode)
1602 #ifdef HAVE_DCACHE_LOCK
1603 spin_lock(&dcache_lock);
1605 spin_lock(&inode->i_lock);
1609 static inline void ll_unlock_dcache(struct inode *inode)
1611 #ifdef HAVE_DCACHE_LOCK
1612 spin_unlock(&dcache_lock);
1614 spin_unlock(&inode->i_lock);
1618 static inline int d_lustre_invalid(const struct dentry *dentry)
1620 struct ll_dentry_data *lld = ll_d2d(dentry);
1622 return (lld == NULL) || lld->lld_invalid;
1625 static inline void __d_lustre_invalidate(struct dentry *dentry)
1627 struct ll_dentry_data *lld = ll_d2d(dentry);
1630 lld->lld_invalid = 1;
1634 * Mark dentry INVALID, if dentry refcount is zero (this is normally case for
1635 * ll_md_blocking_ast), unhash this dentry, and let dcache to reclaim it later;
1636 * else dput() of the last refcount will unhash this dentry and kill it.
1638 static inline void d_lustre_invalidate(struct dentry *dentry, int nested)
1640 CDEBUG(D_DENTRY, "invalidate dentry %.*s (%p) parent %p inode %p "
1641 "refc %d\n", dentry->d_name.len, dentry->d_name.name, dentry,
1642 dentry->d_parent, dentry->d_inode, d_count(dentry));
1644 spin_lock_nested(&dentry->d_lock,
1645 nested ? DENTRY_D_LOCK_NESTED : DENTRY_D_LOCK_NORMAL);
1646 __d_lustre_invalidate(dentry);
1647 if (d_count(dentry) == 0)
1649 spin_unlock(&dentry->d_lock);
1652 static inline void d_lustre_revalidate(struct dentry *dentry)
1654 spin_lock(&dentry->d_lock);
1655 LASSERT(ll_d2d(dentry) != NULL);
1656 ll_d2d(dentry)->lld_invalid = 0;
1657 spin_unlock(&dentry->d_lock);
1660 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 7, 50, 0)
1661 /* Compatibility for old (1.8) compiled userspace quota code */
1662 struct if_quotactl_18 {
1667 struct obd_dqinfo qc_dqinfo;
1668 struct obd_dqblk qc_dqblk;
1670 struct obd_uuid obd_uuid;
1672 #define LL_IOC_QUOTACTL_18 _IOWR('f', 162, struct if_quotactl_18 *)
1673 /* End compatibility for old (1.8) compiled userspace quota code */
1675 #warning "remove old LL_IOC_QUOTACTL_18 compatibility code"
1676 #endif /* LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 7, 50, 0) */
1679 LL_LAYOUT_GEN_NONE = ((__u32)-2), /* layout lock was cancelled */
1680 LL_LAYOUT_GEN_EMPTY = ((__u32)-1) /* for empty layout */
1683 int ll_layout_conf(struct inode *inode, const struct cl_object_conf *conf);
1684 int ll_layout_refresh(struct inode *inode, __u32 *gen);
1685 int ll_layout_restore(struct inode *inode, loff_t start, __u64 length);
1687 int ll_xattr_init(void);
1688 void ll_xattr_fini(void);
1690 int ll_page_sync_io(const struct lu_env *env, struct cl_io *io,
1691 struct cl_page *page, enum cl_req_type crt);
1693 #endif /* LLITE_INTERNAL_H */