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.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2016, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
33 #ifndef LLITE_INTERNAL_H
34 #define LLITE_INTERNAL_H
35 #include <lustre_debug.h>
36 #include <lustre_disk.h> /* for s2sbi */
37 #include <lustre_eacl.h>
38 #include <lustre_linkea.h>
40 /* for struct cl_lock_descr and struct cl_io */
41 #include <cl_object.h>
42 #include <lustre_lmv.h>
43 #include <lustre_mdc.h>
44 #include <lustre_intent.h>
45 #include <linux/compat.h>
46 #include <linux/aio.h>
48 #include <lustre_compat.h>
49 #include "vvp_internal.h"
50 #include "range_lock.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 /* 4UL * 1024 * 1024 */
71 #define LL_MAX_BLKSIZE_BITS 22
73 #define LL_IT2STR(it) ((it) ? ldlm_it2str((it)->it_op) : "0")
74 #define LUSTRE_FPRIVATE(file) ((file)->private_data)
76 struct ll_dentry_data {
77 struct lookup_intent *lld_it;
78 unsigned int lld_sa_generation;
79 unsigned int lld_invalid:1;
80 unsigned int lld_nfs_dentry:1;
81 struct rcu_head lld_rcu_head;
84 #define ll_d2d(de) ((struct ll_dentry_data*)((de)->d_fsdata))
86 #define LLI_INODE_MAGIC 0x111d0de5
87 #define LLI_INODE_DEAD 0xdeadd00d
89 struct ll_getname_data {
90 #ifdef HAVE_DIR_CONTEXT
91 struct dir_context ctx;
93 char *lgd_name; /* points to a buffer with NAME_MAX+1 size */
94 struct lu_fid lgd_fid; /* target fid we are looking for */
95 int lgd_found; /* inode matched? */
99 struct lu_env *lg_env;
101 struct cl_lock *lg_lock;
102 unsigned long lg_gid;
105 struct ll_inode_info {
106 __u32 lli_inode_magic;
109 volatile unsigned long lli_flags;
110 struct posix_acl *lli_posix_acl;
112 /* identifying fields for both metadata and data stacks. */
113 struct lu_fid lli_fid;
114 /* master inode fid for stripe directory */
115 struct lu_fid lli_pfid;
117 /* We need all three because every inode may be opened in different
119 struct obd_client_handle *lli_mds_read_och;
120 struct obd_client_handle *lli_mds_write_och;
121 struct obd_client_handle *lli_mds_exec_och;
122 __u64 lli_open_fd_read_count;
123 __u64 lli_open_fd_write_count;
124 __u64 lli_open_fd_exec_count;
125 /* Protects access to och pointers and their usage counters */
126 struct mutex lli_och_mutex;
128 struct inode lli_vfs_inode;
130 /* the most recent timestamps obtained from mds */
134 spinlock_t lli_agl_lock;
136 /* update atime from MDS no matter if it's older than
137 * local inode atime. */
138 unsigned int lli_update_atime:1,
141 /* Try to make the d::member and f::member are aligned. Before using
142 * these members, make clear whether it is directory or not. */
146 /* serialize normal readdir and statahead-readdir. */
147 struct mutex lli_readdir_mutex;
149 /* metadata statahead */
150 /* since parent-child threads can share the same @file
151 * struct, "opendir_key" is the token when dir close for
152 * case of parent exit before child -- it is me should
153 * cleanup the dir readahead. */
154 void *lli_opendir_key;
155 struct ll_statahead_info *lli_sai;
156 /* protect statahead stuff. */
157 spinlock_t lli_sa_lock;
158 /* "opendir_pid" is the token when lookup/revalid
159 * -- I am the owner of dir statahead. */
160 pid_t lli_opendir_pid;
161 /* stat will try to access statahead entries or start
162 * statahead if this flag is set, and this flag will be
163 * set upon dir open, and cleared when dir is closed,
164 * statahead hit ratio is too low, or start statahead
166 unsigned int lli_sa_enabled:1;
167 /* generation for statahead */
168 unsigned int lli_sa_generation;
169 /* directory stripe information */
170 struct lmv_stripe_md *lli_lsm_md;
171 /* default directory stripe offset. This is extracted
172 * from the "dmv" xattr in order to decide which MDT to
173 * create a subdirectory on. The MDS itself fetches
174 * "dmv" and gets the rest of the default layout itself
175 * (count, hash, etc). */
176 __u32 lli_def_stripe_offset;
179 /* for non-directory */
181 struct mutex lli_size_mutex;
182 char *lli_symlink_name;
184 * struct rw_semaphore {
185 * signed long count; // align d.d_def_acl
186 * spinlock_t wait_lock; // align d.d_sa_lock
187 * struct list_head wait_list;
190 struct rw_semaphore lli_trunc_sem;
191 struct range_lock_tree lli_write_tree;
193 struct rw_semaphore lli_glimpse_sem;
194 cfs_time_t lli_glimpse_time;
195 struct list_head lli_agl_list;
198 /* for writepage() only to communicate to fsync */
202 * whenever a process try to read/write the file, the
203 * jobid of the process will be saved here, and it'll
204 * be packed into the write PRC when flush later.
206 * so the read/write statistics for jobid will not be
207 * accurate if the file is shared by different jobs.
209 char lli_jobid[LUSTRE_JOBID_SIZE];
213 /* XXX: For following frequent used members, although they maybe special
214 * used for non-directory object, it is some time-wasting to check
215 * whether the object is directory or not before using them. On the
216 * other hand, currently, sizeof(f) > sizeof(d), it cannot reduce
217 * the "ll_inode_info" size even if moving those members into u.f.
218 * So keep them out side.
220 * In the future, if more members are added only for directory,
221 * some of the following members can be moved into u.f.
223 struct cl_object *lli_clob;
225 /* mutex to request for layout lock exclusively. */
226 struct mutex lli_layout_mutex;
227 /* Layout version, protected by lli_layout_lock */
228 __u32 lli_layout_gen;
229 spinlock_t lli_layout_lock;
231 __u32 lli_projid; /* project id */
233 struct rw_semaphore lli_xattrs_list_rwsem;
234 struct mutex lli_xattrs_enq_lock;
235 struct list_head lli_xattrs; /* ll_xattr_entry->xe_list */
238 static inline __u32 ll_layout_version_get(struct ll_inode_info *lli)
242 spin_lock(&lli->lli_layout_lock);
243 gen = lli->lli_layout_gen;
244 spin_unlock(&lli->lli_layout_lock);
249 static inline void ll_layout_version_set(struct ll_inode_info *lli, __u32 gen)
251 spin_lock(&lli->lli_layout_lock);
252 lli->lli_layout_gen = gen;
253 spin_unlock(&lli->lli_layout_lock);
257 /* File data is modified. */
258 LLIF_DATA_MODIFIED = 0,
259 /* File is being restored */
260 LLIF_FILE_RESTORING = 1,
261 /* Xattr cache is attached to the file */
262 LLIF_XATTR_CACHE = 2,
265 static inline void ll_file_set_flag(struct ll_inode_info *lli,
266 enum ll_file_flags flag)
268 set_bit(flag, &lli->lli_flags);
271 static inline void ll_file_clear_flag(struct ll_inode_info *lli,
272 enum ll_file_flags flag)
274 clear_bit(flag, &lli->lli_flags);
277 static inline bool ll_file_test_flag(struct ll_inode_info *lli,
278 enum ll_file_flags flag)
280 return test_bit(flag, &lli->lli_flags);
283 static inline bool ll_file_test_and_clear_flag(struct ll_inode_info *lli,
284 enum ll_file_flags flag)
286 return test_and_clear_bit(flag, &lli->lli_flags);
289 int ll_xattr_cache_destroy(struct inode *inode);
291 int ll_xattr_cache_get(struct inode *inode,
297 int ll_dentry_init_security(struct dentry *dentry, int mode, struct qstr *name,
298 const char **secctx_name, void **secctx,
300 int ll_inode_init_security(struct dentry *dentry, struct inode *inode,
304 * Locking to guarantee consistency of non-atomic updates to long long i_size,
305 * consistency between file size and KMS.
307 * Implemented by ->lli_size_mutex and ->lsm_lock, nested in that order.
310 void ll_inode_size_lock(struct inode *inode);
311 void ll_inode_size_unlock(struct inode *inode);
313 // FIXME: replace the name of this with LL_I to conform to kernel stuff
314 // static inline struct ll_inode_info *LL_I(struct inode *inode)
315 static inline struct ll_inode_info *ll_i2info(struct inode *inode)
317 return container_of(inode, struct ll_inode_info, lli_vfs_inode);
320 /* default to about 64M of readahead on a given system. */
321 #define SBI_DEFAULT_READAHEAD_MAX (64UL << (20 - PAGE_SHIFT))
323 /* default to read-ahead full files smaller than 2MB on the second read */
324 #define SBI_DEFAULT_READAHEAD_WHOLE_MAX (2UL << (20 - PAGE_SHIFT))
329 RA_STAT_DISTANT_READPAGE,
330 RA_STAT_MISS_IN_WINDOW,
331 RA_STAT_FAILED_GRAB_PAGE,
332 RA_STAT_FAILED_MATCH,
337 RA_STAT_MAX_IN_FLIGHT,
338 RA_STAT_WRONG_GRAB_PAGE,
339 RA_STAT_FAILED_REACH_END,
344 atomic_t ra_cur_pages;
345 unsigned long ra_max_pages;
346 unsigned long ra_max_pages_per_file;
347 unsigned long ra_max_read_ahead_whole_pages;
350 /* ra_io_arg will be filled in the beginning of ll_readahead with
351 * ras_lock, then the following ll_read_ahead_pages will read RA
352 * pages according to this arg, all the items in this structure are
353 * counted by page index.
356 unsigned long ria_start; /* start offset of read-ahead*/
357 unsigned long ria_end; /* end offset of read-ahead*/
358 unsigned long ria_reserved; /* reserved pages for read-ahead */
359 unsigned long ria_end_min; /* minimum end to cover current read */
360 bool ria_eof; /* reach end of file */
361 /* If stride read pattern is detected, ria_stoff means where
362 * stride read is started. Note: for normal read-ahead, the
363 * value here is meaningless, and also it will not be accessed*/
365 /* ria_length and ria_pages are the length and pages length in the
366 * stride I/O mode. And they will also be used to check whether
367 * it is stride I/O read-ahead in the read-ahead pages*/
368 unsigned long ria_length;
369 unsigned long ria_pages;
372 /* LL_HIST_MAX=32 causes an overflow */
373 #define LL_HIST_MAX 28
374 #define LL_HIST_START 12 /* buckets start at 2^12 = 4k */
375 #define LL_PROCESS_HIST_MAX 10
376 struct per_process_info {
378 struct obd_histogram pp_r_hist;
379 struct obd_histogram pp_w_hist;
382 /* pp_extents[LL_PROCESS_HIST_MAX] will hold the combined process info */
383 struct ll_rw_extents_info {
384 struct per_process_info pp_extents[LL_PROCESS_HIST_MAX + 1];
387 #define LL_OFFSET_HIST_MAX 100
388 struct ll_rw_process_info {
391 loff_t rw_range_start;
393 loff_t rw_last_file_pos;
395 size_t rw_smallest_extent;
396 size_t rw_largest_extent;
397 struct ll_file_data *rw_last_file;
400 enum stats_track_type {
401 STATS_TRACK_ALL = 0, /* track all processes */
402 STATS_TRACK_PID, /* track process with this pid */
403 STATS_TRACK_PPID, /* track processes with this ppid */
404 STATS_TRACK_GID, /* track processes with this gid */
408 /* flags for sbi->ll_flags */
409 #define LL_SBI_NOLCK 0x01 /* DLM locking disabled (directio-only) */
410 #define LL_SBI_CHECKSUM 0x02 /* checksum each page as it's written */
411 #define LL_SBI_FLOCK 0x04
412 #define LL_SBI_USER_XATTR 0x08 /* support user xattr */
413 #define LL_SBI_ACL 0x10 /* support ACL */
414 /* LL_SBI_RMT_CLIENT 0x40 remote client */
415 #define LL_SBI_MDS_CAPA 0x80 /* support mds capa, obsolete */
416 #define LL_SBI_OSS_CAPA 0x100 /* support oss capa, obsolete */
417 #define LL_SBI_LOCALFLOCK 0x200 /* Local flocks support by kernel */
418 #define LL_SBI_LRU_RESIZE 0x400 /* lru resize support */
419 #define LL_SBI_LAZYSTATFS 0x800 /* lazystatfs mount option */
420 /* LL_SBI_SOM_PREVIEW 0x1000 SOM preview mount option, obsolete */
421 #define LL_SBI_32BIT_API 0x2000 /* generate 32 bit inodes. */
422 #define LL_SBI_64BIT_HASH 0x4000 /* support 64-bits dir hash/offset */
423 #define LL_SBI_AGL_ENABLED 0x8000 /* enable agl */
424 #define LL_SBI_VERBOSE 0x10000 /* verbose mount/umount */
425 #define LL_SBI_LAYOUT_LOCK 0x20000 /* layout lock support */
426 #define LL_SBI_USER_FID2PATH 0x40000 /* allow fid2path by unprivileged users */
427 #define LL_SBI_XATTR_CACHE 0x80000 /* support for xattr cache */
428 #define LL_SBI_NOROOTSQUASH 0x100000 /* do not apply root squash */
429 #define LL_SBI_ALWAYS_PING 0x200000 /* always ping even if server
431 #define LL_SBI_FAST_READ 0x400000 /* fast read support */
432 #define LL_SBI_FILE_SECCTX 0x800000 /* set file security context at create */
433 #define LL_SBI_PIO 0x1000000 /* parallel IO support */
435 #define LL_SBI_FLAGS { \
463 /* This is embedded into llite super-blocks to keep track of connect
464 * flags (capabilities) supported by all imports given mount is
466 struct lustre_client_ocd {
467 /* This is conjunction of connect_flags across all imports
468 * (LOVs) this mount is connected to. This field is updated by
469 * cl_ocd_update() under ->lco_lock. */
471 struct mutex lco_lock;
472 struct obd_export *lco_md_exp;
473 struct obd_export *lco_dt_exp;
477 /* this protects pglist and ra_info. It isn't safe to
478 * grab from interrupt contexts */
480 spinlock_t ll_pp_extent_lock; /* pp_extent entry*/
481 spinlock_t ll_process_lock; /* ll_rw_process_info */
482 struct obd_uuid ll_sb_uuid;
483 struct obd_export *ll_md_exp;
484 struct obd_export *ll_dt_exp;
485 struct proc_dir_entry* ll_proc_root;
486 struct lu_fid ll_root_fid; /* root object fid */
489 unsigned int ll_umounting:1,
490 ll_xattr_cache_enabled:1,
491 ll_xattr_cache_set:1, /* already set to 0/1 */
492 ll_client_common_fill_super_succeeded:1;
494 struct lustre_client_ocd ll_lco;
496 struct lprocfs_stats *ll_stats; /* lprocfs stats counter */
498 /* Used to track "unstable" pages on a client, and maintain a
499 * LRU list of clean pages. An "unstable" page is defined as
500 * any page which is sent to a server as part of a bulk request,
501 * but is uncommitted to stable storage. */
502 struct cl_client_cache *ll_cache;
504 struct lprocfs_stats *ll_ra_stats;
506 struct ll_ra_info ll_ra_info;
507 unsigned int ll_namelen;
508 struct file_operations *ll_fop;
510 struct lu_site *ll_site;
511 struct cl_device *ll_cl;
513 struct ll_rw_extents_info ll_rw_extents_info;
514 int ll_extent_process_count;
515 struct ll_rw_process_info ll_rw_process_info[LL_PROCESS_HIST_MAX];
516 unsigned int ll_offset_process_count;
517 struct ll_rw_process_info ll_rw_offset_info[LL_OFFSET_HIST_MAX];
518 unsigned int ll_rw_offset_entry_count;
519 int ll_stats_track_id;
520 enum stats_track_type ll_stats_track_type;
523 /* metadata stat-ahead */
524 unsigned int ll_sa_max; /* max statahead RPCs */
525 atomic_t ll_sa_total; /* statahead thread started
527 atomic_t ll_sa_wrong; /* statahead thread stopped for
529 atomic_t ll_sa_running; /* running statahead thread
531 atomic_t ll_agl_total; /* AGL thread started count */
533 dev_t ll_sdev_orig; /* save s_dev before assign for
536 struct root_squash_info ll_squash;
539 /* st_blksize returned by stat(2), when non-zero */
540 unsigned int ll_stat_blksize;
544 * per file-descriptor read-ahead data.
546 struct ll_readahead_state {
549 * index of the last page that read(2) needed and that wasn't in the
550 * cache. Used by ras_update() to detect seeks.
552 * XXX nikita: if access seeks into cached region, Lustre doesn't see
555 unsigned long ras_last_readpage;
557 * number of pages read after last read-ahead window reset. As window
558 * is reset on each seek, this is effectively a number of consecutive
559 * accesses. Maybe ->ras_accessed_in_window is better name.
561 * XXX nikita: window is also reset (by ras_update()) when Lustre
562 * believes that memory pressure evicts read-ahead pages. In that
563 * case, it probably doesn't make sense to expand window to
564 * PTLRPC_MAX_BRW_PAGES on the third access.
566 unsigned long ras_consecutive_pages;
568 * number of read requests after the last read-ahead window reset
569 * As window is reset on each seek, this is effectively the number
570 * on consecutive read request and is used to trigger read-ahead.
572 unsigned long ras_consecutive_requests;
574 * Parameters of current read-ahead window. Handled by
575 * ras_update(). On the initial access to the file or after a seek,
576 * window is reset to 0. After 3 consecutive accesses, window is
577 * expanded to PTLRPC_MAX_BRW_PAGES. Afterwards, window is enlarged by
578 * PTLRPC_MAX_BRW_PAGES chunks up to ->ra_max_pages.
580 unsigned long ras_window_start, ras_window_len;
582 * Optimal RPC size. It decides how many pages will be sent
583 * for each read-ahead.
585 unsigned long ras_rpc_size;
587 * Where next read-ahead should start at. This lies within read-ahead
588 * window. Read-ahead window is read in pieces rather than at once
589 * because: 1. lustre limits total number of pages under read-ahead by
590 * ->ra_max_pages (see ll_ra_count_get()), 2. client cannot read pages
591 * not covered by DLM lock.
593 unsigned long ras_next_readahead;
595 * Total number of ll_file_read requests issued, reads originating
596 * due to mmap are not counted in this total. This value is used to
597 * trigger full file read-ahead after multiple reads to a small file.
599 unsigned long ras_requests;
601 * Page index with respect to the current request, these value
602 * will not be accurate when dealing with reads issued via mmap.
604 unsigned long ras_request_index;
606 * The following 3 items are used for detecting the stride I/O
608 * In stride I/O mode,
609 * ...............|-----data-----|****gap*****|--------|******|....
610 * offset |-stride_pages-|-stride_gap-|
611 * ras_stride_offset = offset;
612 * ras_stride_length = stride_pages + stride_gap;
613 * ras_stride_pages = stride_pages;
614 * Note: all these three items are counted by pages.
616 unsigned long ras_stride_length;
617 unsigned long ras_stride_pages;
618 pgoff_t ras_stride_offset;
620 * number of consecutive stride request count, and it is similar as
621 * ras_consecutive_requests, but used for stride I/O mode.
622 * Note: only more than 2 consecutive stride request are detected,
623 * stride read-ahead will be enable
625 unsigned long ras_consecutive_stride_requests;
628 extern struct kmem_cache *ll_file_data_slab;
629 struct lustre_handle;
630 struct ll_file_data {
631 struct ll_readahead_state fd_ras;
632 struct ll_grouplock fd_grouplock;
636 /* openhandle if lease exists for this file.
637 * Borrow lli->lli_och_mutex to protect assignment */
638 struct obd_client_handle *fd_lease_och;
639 struct obd_client_handle *fd_och;
640 struct file *fd_file;
641 /* Indicate whether need to report failure when close.
642 * true: failure is known, not report again.
643 * false: unknown failure, should report. */
644 bool fd_write_failed;
645 rwlock_t fd_lock; /* protect lcc list */
646 struct list_head fd_lccs; /* list of ll_cl_context */
649 extern struct proc_dir_entry *proc_lustre_fs_root;
651 static inline struct inode *ll_info2i(struct ll_inode_info *lli)
653 return &lli->lli_vfs_inode;
656 __u32 ll_i2suppgid(struct inode *i);
657 void ll_i2gids(__u32 *suppgids, struct inode *i1,struct inode *i2);
659 static inline int ll_need_32bit_api(struct ll_sb_info *sbi)
661 #if BITS_PER_LONG == 32
663 #elif defined(CONFIG_COMPAT)
664 if (unlikely(sbi->ll_flags & LL_SBI_32BIT_API))
667 # ifdef CONFIG_X86_X32
668 /* in_compat_syscall() returns true when called from a kthread
669 * and CONFIG_X86_X32 is enabled, which is wrong. So check
670 * whether the caller comes from a syscall (ie. not a kthread)
671 * before calling in_compat_syscall(). */
672 if (current->flags & PF_KTHREAD)
676 return unlikely(in_compat_syscall());
678 return unlikely(sbi->ll_flags & LL_SBI_32BIT_API);
682 static inline bool ll_sbi_has_fast_read(struct ll_sb_info *sbi)
684 return !!(sbi->ll_flags & LL_SBI_FAST_READ);
687 void ll_ras_enter(struct file *f);
689 /* llite/lcommon_misc.c */
690 int cl_ocd_update(struct obd_device *host, struct obd_device *watched,
691 enum obd_notify_event ev, void *owner);
692 int cl_get_grouplock(struct cl_object *obj, unsigned long gid, int nonblock,
693 struct ll_grouplock *lg);
694 void cl_put_grouplock(struct ll_grouplock *lg);
696 /* llite/lproc_llite.c */
697 #ifdef CONFIG_PROC_FS
698 int lprocfs_ll_register_mountpoint(struct proc_dir_entry *parent,
699 struct super_block *sb);
700 int lprocfs_ll_register_obd(struct super_block *sb, const char *obdname);
701 void lprocfs_ll_unregister_mountpoint(struct ll_sb_info *sbi);
702 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count);
703 extern struct lprocfs_vars lprocfs_llite_obd_vars[];
705 static inline int lprocfs_ll_register_mountpoint(struct proc_dir_entry *parent,
706 struct super_block *sb) {return 0; }
707 static inline int lprocfs_ll_register_obd(struct super_block *sb,
708 const char *obdname) {return 0; }
709 static inline void lprocfs_ll_unregister_mountpoint(struct ll_sb_info *sbi) {}
710 static void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count) {}
715 LPROC_LL_DIRTY_MISSES,
717 LPROC_LL_WRITE_BYTES,
742 LPROC_LL_ALLOC_INODE,
745 LPROC_LL_GETXATTR_HITS,
747 LPROC_LL_REMOVEXATTR,
749 LPROC_LL_FILE_OPCODES
753 struct ll_dir_chain {
756 static inline void ll_dir_chain_init(struct ll_dir_chain *chain)
760 static inline void ll_dir_chain_fini(struct ll_dir_chain *chain)
764 extern const struct file_operations ll_dir_operations;
765 extern const struct inode_operations ll_dir_inode_operations;
766 #ifdef HAVE_DIR_CONTEXT
767 int ll_dir_read(struct inode *inode, __u64 *pos, struct md_op_data *op_data,
768 struct dir_context *ctx);
770 int ll_dir_read(struct inode *inode, __u64 *pos, struct md_op_data *op_data,
771 void *cookie, filldir_t filldir);
773 int ll_get_mdt_idx(struct inode *inode);
774 int ll_get_mdt_idx_by_fid(struct ll_sb_info *sbi, const struct lu_fid *fid);
775 struct page *ll_get_dir_page(struct inode *dir, struct md_op_data *op_data,
776 __u64 offset, struct ll_dir_chain *chain);
777 void ll_release_page(struct inode *inode, struct page *page, bool remove);
780 extern const struct inode_operations ll_special_inode_operations;
782 struct inode *ll_iget(struct super_block *sb, ino_t hash,
783 struct lustre_md *lic);
784 int ll_test_inode_by_fid(struct inode *inode, void *opaque);
785 int ll_md_blocking_ast(struct ldlm_lock *, struct ldlm_lock_desc *,
786 void *data, int flag);
787 struct dentry *ll_splice_alias(struct inode *inode, struct dentry *de);
788 int ll_rmdir_entry(struct inode *dir, char *name, int namelen);
789 void ll_update_times(struct ptlrpc_request *request, struct inode *inode);
792 int ll_writepage(struct page *page, struct writeback_control *wbc);
793 int ll_writepages(struct address_space *, struct writeback_control *wbc);
794 int ll_readpage(struct file *file, struct page *page);
795 void ll_readahead_init(struct inode *inode, struct ll_readahead_state *ras);
796 int vvp_io_write_commit(const struct lu_env *env, struct cl_io *io);
799 void ll_cl_add(struct file *file, const struct lu_env *env, struct cl_io *io,
801 void ll_cl_remove(struct file *file, const struct lu_env *env);
802 struct ll_cl_context *ll_cl_find(struct file *file);
804 extern const struct address_space_operations ll_aops;
807 extern struct file_operations ll_file_operations;
808 extern struct file_operations ll_file_operations_flock;
809 extern struct file_operations ll_file_operations_noflock;
810 extern struct inode_operations ll_file_inode_operations;
811 extern int ll_have_md_lock(struct inode *inode, __u64 *bits,
812 enum ldlm_mode l_req_mode);
813 extern enum ldlm_mode ll_take_md_lock(struct inode *inode, __u64 bits,
814 struct lustre_handle *lockh, __u64 flags,
815 enum ldlm_mode mode);
817 int ll_file_open(struct inode *inode, struct file *file);
818 int ll_file_release(struct inode *inode, struct file *file);
819 int ll_release_openhandle(struct dentry *, struct lookup_intent *);
820 int ll_md_real_close(struct inode *inode, fmode_t fmode);
821 extern void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
822 struct ll_file_data *file, loff_t pos,
823 size_t count, int rw);
824 #ifdef HAVE_INODEOPS_ENHANCED_GETATTR
825 int ll_getattr(const struct path *path, struct kstat *stat,
826 u32 request_mask, unsigned int flags);
828 int ll_getattr(struct vfsmount *mnt, struct dentry *de, struct kstat *stat);
830 struct posix_acl *ll_get_acl(struct inode *inode, int type);
831 #ifdef HAVE_IOP_SET_ACL
832 #ifdef CONFIG_FS_POSIX_ACL
833 int ll_set_acl(struct inode *inode, struct posix_acl *acl, int type);
834 #else /* !CONFIG_FS_POSIX_ACL */
835 #define ll_set_acl NULL
836 #endif /* CONFIG_FS_POSIX_ACL */
839 int ll_migrate(struct inode *parent, struct file *file, int mdtidx,
840 const char *name, int namelen);
841 int ll_get_fid_by_name(struct inode *parent, const char *name,
842 int namelen, struct lu_fid *fid, struct inode **inode);
843 #ifdef HAVE_GENERIC_PERMISSION_4ARGS
844 int ll_inode_permission(struct inode *inode, int mask, unsigned int flags);
846 # ifndef HAVE_INODE_PERMISION_2ARGS
847 int ll_inode_permission(struct inode *inode, int mask, struct nameidata *nd);
849 int ll_inode_permission(struct inode *inode, int mask);
852 int ll_ioctl_fsgetxattr(struct inode *inode, unsigned int cmd,
854 int ll_ioctl_fssetxattr(struct inode *inode, unsigned int cmd,
857 int ll_lov_setstripe_ea_info(struct inode *inode, struct dentry *dentry,
858 __u64 flags, struct lov_user_md *lum,
860 int ll_lov_getstripe_ea_info(struct inode *inode, const char *filename,
861 struct lov_mds_md **lmm, int *lmm_size,
862 struct ptlrpc_request **request);
863 int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump,
865 int ll_dir_getstripe(struct inode *inode, void **lmmp,
866 int *lmm_size, struct ptlrpc_request **request,
868 #ifdef HAVE_FILE_FSYNC_4ARGS
869 int ll_fsync(struct file *file, loff_t start, loff_t end, int data);
870 #elif defined(HAVE_FILE_FSYNC_2ARGS)
871 int ll_fsync(struct file *file, int data);
873 int ll_fsync(struct file *file, struct dentry *dentry, int data);
875 int ll_merge_attr(const struct lu_env *env, struct inode *inode);
876 int ll_fid2path(struct inode *inode, void __user *arg);
877 int ll_data_version(struct inode *inode, __u64 *data_version, int flags);
878 int ll_hsm_release(struct inode *inode);
879 int ll_hsm_state_set(struct inode *inode, struct hsm_state_set *hss);
883 int ll_d_init(struct dentry *de);
884 extern const struct dentry_operations ll_d_ops;
885 void ll_intent_drop_lock(struct lookup_intent *);
886 void ll_intent_release(struct lookup_intent *);
887 void ll_invalidate_aliases(struct inode *);
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 void ll_lli_init(struct ll_inode_info *lli);
896 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt);
897 void ll_put_super(struct super_block *sb);
898 void ll_kill_super(struct super_block *sb);
899 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock);
900 void ll_dir_clear_lsm_md(struct inode *inode);
901 void ll_clear_inode(struct inode *inode);
902 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr, bool hsm_import);
903 int ll_setattr(struct dentry *de, struct iattr *attr);
904 int ll_statfs(struct dentry *de, struct kstatfs *sfs);
905 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
906 __u64 max_age, __u32 flags);
907 int ll_update_inode(struct inode *inode, struct lustre_md *md);
908 int ll_read_inode2(struct inode *inode, void *opaque);
909 void ll_delete_inode(struct inode *inode);
910 int ll_iocontrol(struct inode *inode, struct file *file,
911 unsigned int cmd, unsigned long arg);
912 int ll_flush_ctx(struct inode *inode);
913 void ll_umount_begin(struct super_block *sb);
914 int ll_remount_fs(struct super_block *sb, int *flags, char *data);
915 #ifdef HAVE_SUPEROPS_USE_DENTRY
916 int ll_show_options(struct seq_file *seq, struct dentry *dentry);
918 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs);
920 void ll_dirty_page_discard_warn(struct page *page, int ioret);
921 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
922 struct super_block *, struct lookup_intent *);
923 int ll_obd_statfs(struct inode *inode, void __user *arg);
924 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *max_mdsize);
925 int ll_get_default_mdsize(struct ll_sb_info *sbi, int *default_mdsize);
926 int ll_set_default_mdsize(struct ll_sb_info *sbi, int default_mdsize);
927 int ll_process_config(struct lustre_cfg *lcfg);
930 LUSTRE_OPC_MKDIR = 0,
931 LUSTRE_OPC_SYMLINK = 1,
932 LUSTRE_OPC_MKNOD = 2,
933 LUSTRE_OPC_CREATE = 3,
937 struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
938 struct inode *i1, struct inode *i2,
939 const char *name, size_t namelen,
940 __u32 mode, __u32 opc, void *data);
941 void ll_finish_md_op_data(struct md_op_data *op_data);
942 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg);
943 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen);
944 void ll_compute_rootsquash_state(struct ll_sb_info *sbi);
945 ssize_t ll_copy_user_md(const struct lov_user_md __user *md,
946 struct lov_user_md **kbuf);
947 void ll_open_cleanup(struct super_block *sb, struct ptlrpc_request *open_req);
949 /* Compute expected user md size when passing in a md from user space */
950 static inline ssize_t ll_lov_user_md_size(const struct lov_user_md *lum)
952 switch (lum->lmm_magic) {
953 case LOV_USER_MAGIC_V1:
954 return sizeof(struct lov_user_md_v1);
955 case LOV_USER_MAGIC_V3:
956 return sizeof(struct lov_user_md_v3);
957 case LOV_USER_MAGIC_SPECIFIC:
958 if (lum->lmm_stripe_count > LOV_MAX_STRIPE_COUNT)
961 return lov_user_md_size(lum->lmm_stripe_count,
962 LOV_USER_MAGIC_SPECIFIC);
963 case LOV_USER_MAGIC_COMP_V1:
964 return ((struct lov_comp_md_v1 *)lum)->lcm_size;
970 /* llite/llite_nfs.c */
971 extern struct export_operations lustre_export_operations;
972 __u32 get_uuid2int(const char *name, int len);
973 struct inode *search_inode_for_lustre(struct super_block *sb,
974 const struct lu_fid *fid);
975 int ll_dir_get_parent_fid(struct inode *dir, struct lu_fid *parent_fid);
977 /* llite/symlink.c */
978 extern struct inode_operations ll_fast_symlink_inode_operations;
981 * IO arguments for various VFS I/O interfaces.
984 /** normal/sendfile/splice */
985 enum vvp_io_subtype via_io_subtype;
989 struct kiocb *via_iocb;
990 struct iov_iter *via_iter;
993 struct pipe_inode_info *via_pipe;
994 unsigned int via_flags;
1004 struct ll_cl_context {
1005 struct list_head lcc_list;
1007 const struct lu_env *lcc_env;
1008 struct cl_io *lcc_io;
1009 struct cl_page *lcc_page;
1010 enum lcc_type lcc_type;
1013 struct ll_thread_info {
1014 struct iov_iter lti_iter;
1015 struct vvp_io_args lti_args;
1016 struct ra_io_arg lti_ria;
1017 struct kiocb lti_kiocb;
1018 struct ll_cl_context lti_io_ctx;
1021 extern struct lu_context_key ll_thread_key;
1023 static inline struct ll_thread_info *ll_env_info(const struct lu_env *env)
1025 struct ll_thread_info *lti;
1027 lti = lu_context_key_get(&env->le_ctx, &ll_thread_key);
1028 LASSERT(lti != NULL);
1033 static inline struct vvp_io_args *ll_env_args(const struct lu_env *env,
1034 enum vvp_io_subtype type)
1036 struct vvp_io_args *via = &ll_env_info(env)->lti_args;
1038 via->via_io_subtype = type;
1043 /* llite/llite_mmap.c */
1045 int ll_teardown_mmaps(struct address_space *mapping, __u64 first, __u64 last);
1046 int ll_file_mmap(struct file * file, struct vm_area_struct * vma);
1047 void policy_from_vma(union ldlm_policy_data *policy, struct vm_area_struct *vma,
1048 unsigned long addr, size_t count);
1049 struct vm_area_struct *our_vma(struct mm_struct *mm, unsigned long addr,
1052 static inline void ll_invalidate_page(struct page *vmpage)
1054 struct address_space *mapping = vmpage->mapping;
1055 loff_t offset = vmpage->index << PAGE_SHIFT;
1057 LASSERT(PageLocked(vmpage));
1058 if (mapping == NULL)
1062 * truncate_complete_page() calls
1063 * a_ops->invalidatepage()->cl_page_delete()->vvp_page_delete().
1065 ll_teardown_mmaps(mapping, offset, offset + PAGE_SIZE);
1066 truncate_complete_page(mapping, vmpage);
1069 #define ll_s2sbi(sb) (s2lsi(sb)->lsi_llsbi)
1071 /* don't need an addref as the sb_info should be holding one */
1072 static inline struct obd_export *ll_s2dtexp(struct super_block *sb)
1074 return ll_s2sbi(sb)->ll_dt_exp;
1077 /* don't need an addref as the sb_info should be holding one */
1078 static inline struct obd_export *ll_s2mdexp(struct super_block *sb)
1080 return ll_s2sbi(sb)->ll_md_exp;
1083 static inline struct client_obd *sbi2mdc(struct ll_sb_info *sbi)
1085 struct obd_device *obd = sbi->ll_md_exp->exp_obd;
1091 // FIXME: replace the name of this with LL_SB to conform to kernel stuff
1092 static inline struct ll_sb_info *ll_i2sbi(struct inode *inode)
1094 return ll_s2sbi(inode->i_sb);
1097 static inline struct obd_export *ll_i2dtexp(struct inode *inode)
1099 return ll_s2dtexp(inode->i_sb);
1102 static inline struct obd_export *ll_i2mdexp(struct inode *inode)
1104 return ll_s2mdexp(inode->i_sb);
1107 static inline struct lu_fid *ll_inode2fid(struct inode *inode)
1111 LASSERT(inode != NULL);
1112 fid = &ll_i2info(inode)->lli_fid;
1117 static inline loff_t ll_file_maxbytes(struct inode *inode)
1119 struct cl_object *obj = ll_i2info(inode)->lli_clob;
1122 return MAX_LFS_FILESIZE;
1124 return min_t(loff_t, cl_object_maxbytes(obj), MAX_LFS_FILESIZE);
1128 extern const struct xattr_handler *ll_xattr_handlers[];
1130 #define XATTR_USER_T 1
1131 #define XATTR_TRUSTED_T 2
1132 #define XATTR_SECURITY_T 3
1133 #define XATTR_ACL_ACCESS_T 4
1134 #define XATTR_ACL_DEFAULT_T 5
1135 #define XATTR_LUSTRE_T 6
1136 #define XATTR_OTHER_T 7
1138 ssize_t ll_listxattr(struct dentry *dentry, char *buffer, size_t size);
1139 int ll_xattr_list(struct inode *inode, const char *name, int type,
1140 void *buffer, size_t size, u64 valid);
1141 const struct xattr_handler *get_xattr_type(const char *name);
1144 * Common IO arguments for various VFS I/O interfaces.
1146 int cl_sb_init(struct super_block *sb);
1147 int cl_sb_fini(struct super_block *sb);
1149 enum ras_update_flags {
1153 void ll_ra_count_put(struct ll_sb_info *sbi, unsigned long len);
1154 void ll_ra_stats_inc(struct inode *inode, enum ra_stat which);
1158 #define LL_SA_RPC_MIN 2
1159 #define LL_SA_RPC_DEF 32
1160 #define LL_SA_RPC_MAX 8192
1162 #define LL_SA_CACHE_BIT 5
1163 #define LL_SA_CACHE_SIZE (1 << LL_SA_CACHE_BIT)
1164 #define LL_SA_CACHE_MASK (LL_SA_CACHE_SIZE - 1)
1166 /* per inode struct, for dir only */
1167 struct ll_statahead_info {
1168 struct dentry *sai_dentry;
1169 atomic_t sai_refcount; /* when access this struct, hold
1171 unsigned int sai_max; /* max ahead of lookup */
1172 __u64 sai_sent; /* stat requests sent count */
1173 __u64 sai_replied; /* stat requests which received
1175 __u64 sai_index; /* index of statahead entry */
1176 __u64 sai_index_wait; /* index of entry which is the
1177 * caller is waiting for */
1178 __u64 sai_hit; /* hit count */
1179 __u64 sai_miss; /* miss count:
1180 * for "ls -al" case, includes
1181 * hidden dentry miss;
1182 * for "ls -l" case, it does not
1183 * include hidden dentry miss.
1184 * "sai_miss_hidden" is used for
1187 unsigned int sai_consecutive_miss; /* consecutive miss */
1188 unsigned int sai_miss_hidden;/* "ls -al", but first dentry
1189 * is not a hidden one */
1190 unsigned int sai_skip_hidden;/* skipped hidden dentry count
1192 unsigned int sai_ls_all:1, /* "ls -al", do stat-ahead for
1194 sai_agl_valid:1,/* AGL is valid for the dir */
1195 sai_in_readpage:1;/* statahead is in readdir()*/
1196 wait_queue_head_t sai_waitq; /* stat-ahead wait queue */
1197 struct ptlrpc_thread sai_thread; /* stat-ahead thread */
1198 struct ptlrpc_thread sai_agl_thread; /* AGL thread */
1199 struct list_head sai_interim_entries; /* entries which got async
1200 * stat reply, but not
1202 struct list_head sai_entries; /* completed entries */
1203 struct list_head sai_agls; /* AGLs to be sent */
1204 struct list_head sai_cache[LL_SA_CACHE_SIZE];
1205 spinlock_t sai_cache_lock[LL_SA_CACHE_SIZE];
1206 atomic_t sai_cache_count; /* entry count in cache */
1209 int ll_statahead(struct inode *dir, struct dentry **dentry, bool unplug);
1210 void ll_authorize_statahead(struct inode *dir, void *key);
1211 void ll_deauthorize_statahead(struct inode *dir, void *key);
1214 blkcnt_t dirty_cnt(struct inode *inode);
1216 int cl_glimpse_size0(struct inode *inode, int agl);
1217 int cl_glimpse_lock(const struct lu_env *env, struct cl_io *io,
1218 struct inode *inode, struct cl_object *clob, int agl);
1220 static inline int cl_glimpse_size(struct inode *inode)
1222 return cl_glimpse_size0(inode, 0);
1225 static inline int cl_agl(struct inode *inode)
1227 return cl_glimpse_size0(inode, 1);
1230 static inline int ll_glimpse_size(struct inode *inode)
1232 struct ll_inode_info *lli = ll_i2info(inode);
1235 down_read(&lli->lli_glimpse_sem);
1236 rc = cl_glimpse_size(inode);
1237 lli->lli_glimpse_time = cfs_time_current();
1238 up_read(&lli->lli_glimpse_sem);
1242 /* dentry may statahead when statahead is enabled and current process has opened
1243 * parent directory, and this dentry hasn't accessed statahead cache before */
1245 dentry_may_statahead(struct inode *dir, struct dentry *dentry)
1247 struct ll_inode_info *lli;
1248 struct ll_dentry_data *ldd;
1250 if (ll_i2sbi(dir)->ll_sa_max == 0)
1253 lli = ll_i2info(dir);
1255 /* statahead is not allowed for this dir, there may be three causes:
1256 * 1. dir is not opened.
1257 * 2. statahead hit ratio is too low.
1258 * 3. previous stat started statahead thread failed. */
1259 if (!lli->lli_sa_enabled)
1262 /* not the same process, don't statahead */
1263 if (lli->lli_opendir_pid != current_pid())
1267 * When stating a dentry, kernel may trigger 'revalidate' or 'lookup'
1268 * multiple times, eg. for 'getattr', 'getxattr' and etc.
1269 * For patchless client, lookup intent is not accurate, which may
1270 * misguide statahead. For example:
1271 * The 'revalidate' call for 'getattr' and 'getxattr' of a dentry will
1272 * have the same intent -- IT_GETATTR, while one dentry should access
1273 * statahead cache once, otherwise statahead windows is messed up.
1274 * The solution is as following:
1275 * Assign 'lld_sa_generation' with 'lli_sa_generation' when a dentry
1276 * IT_GETATTR for the first time, and subsequent IT_GETATTR will
1277 * bypass interacting with statahead cache by checking
1278 * 'lld_sa_generation == lli->lli_sa_generation'.
1280 ldd = ll_d2d(dentry);
1281 if (ldd != NULL && ldd->lld_sa_generation == lli->lli_sa_generation)
1287 int cl_sync_file_range(struct inode *inode, loff_t start, loff_t end,
1288 enum cl_fsync_mode mode, int ignore_layout);
1290 static inline int ll_file_nolock(const struct file *file)
1292 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
1293 struct inode *inode = file_inode((struct file *)file);
1295 LASSERT(fd != NULL);
1296 return ((fd->fd_flags & LL_FILE_IGNORE_LOCK) ||
1297 (ll_i2sbi(inode)->ll_flags & LL_SBI_NOLCK));
1300 static inline void ll_set_lock_data(struct obd_export *exp, struct inode *inode,
1301 struct lookup_intent *it, __u64 *bits)
1303 if (!it->it_lock_set) {
1304 struct lustre_handle handle;
1306 /* If this inode is a remote object, it will get two
1307 * separate locks in different namespaces, Master MDT,
1308 * where the name entry is, will grant LOOKUP lock,
1309 * remote MDT, where the object is, will grant
1310 * UPDATE|PERM lock. The inode will be attched to both
1311 * LOOKUP and PERM locks, so revoking either locks will
1312 * case the dcache being cleared */
1313 if (it->it_remote_lock_mode) {
1314 handle.cookie = it->it_remote_lock_handle;
1315 CDEBUG(D_DLMTRACE, "setting l_data to inode "DFID
1316 "(%p) for remote lock %#llx\n",
1317 PFID(ll_inode2fid(inode)), inode,
1319 md_set_lock_data(exp, &handle, inode, NULL);
1322 handle.cookie = it->it_lock_handle;
1324 CDEBUG(D_DLMTRACE, "setting l_data to inode "DFID"(%p)"
1325 " for lock %#llx\n",
1326 PFID(ll_inode2fid(inode)), inode, handle.cookie);
1328 md_set_lock_data(exp, &handle, inode, &it->it_lock_bits);
1329 it->it_lock_set = 1;
1333 *bits = it->it_lock_bits;
1336 static inline void ll_lock_dcache(struct inode *inode)
1338 #ifdef HAVE_DCACHE_LOCK
1339 spin_lock(&dcache_lock);
1341 spin_lock(&inode->i_lock);
1345 static inline void ll_unlock_dcache(struct inode *inode)
1347 #ifdef HAVE_DCACHE_LOCK
1348 spin_unlock(&dcache_lock);
1350 spin_unlock(&inode->i_lock);
1354 static inline int d_lustre_invalid(const struct dentry *dentry)
1356 struct ll_dentry_data *lld = ll_d2d(dentry);
1358 return (lld == NULL) || lld->lld_invalid;
1361 static inline void __d_lustre_invalidate(struct dentry *dentry)
1363 struct ll_dentry_data *lld = ll_d2d(dentry);
1366 lld->lld_invalid = 1;
1370 * Mark dentry INVALID, if dentry refcount is zero (this is normally case for
1371 * ll_md_blocking_ast), unhash this dentry, and let dcache to reclaim it later;
1372 * else dput() of the last refcount will unhash this dentry and kill it.
1374 static inline void d_lustre_invalidate(struct dentry *dentry, int nested)
1376 CDEBUG(D_DENTRY, "invalidate dentry %.*s (%p) parent %p inode %p "
1377 "refc %d\n", dentry->d_name.len, dentry->d_name.name, dentry,
1378 dentry->d_parent, dentry->d_inode, ll_d_count(dentry));
1380 spin_lock_nested(&dentry->d_lock,
1381 nested ? DENTRY_D_LOCK_NESTED : DENTRY_D_LOCK_NORMAL);
1382 __d_lustre_invalidate(dentry);
1384 * We should be careful about dentries created by d_obtain_alias().
1385 * These dentries are not put in the dentry tree, instead they are
1386 * linked to sb->s_anon through dentry->d_hash.
1387 * shrink_dcache_for_umount() shrinks the tree and sb->s_anon list.
1388 * If we unhashed such a dentry, unmount would not be able to find
1389 * it and busy inodes would be reported.
1391 if (ll_d_count(dentry) == 0 && !(dentry->d_flags & DCACHE_DISCONNECTED))
1393 spin_unlock(&dentry->d_lock);
1396 static inline void d_lustre_revalidate(struct dentry *dentry)
1398 spin_lock(&dentry->d_lock);
1399 LASSERT(ll_d2d(dentry) != NULL);
1400 ll_d2d(dentry)->lld_invalid = 0;
1401 spin_unlock(&dentry->d_lock);
1404 int ll_layout_conf(struct inode *inode, const struct cl_object_conf *conf);
1405 int ll_layout_refresh(struct inode *inode, __u32 *gen);
1406 int ll_layout_restore(struct inode *inode, loff_t start, __u64 length);
1407 int ll_layout_write_intent(struct inode *inode, __u64 start, __u64 end);
1409 int ll_xattr_init(void);
1410 void ll_xattr_fini(void);
1412 int ll_page_sync_io(const struct lu_env *env, struct cl_io *io,
1413 struct cl_page *page, enum cl_req_type crt);
1415 int ll_getparent(struct file *file, struct getparent __user *arg);
1418 int cl_setattr_ost(struct cl_object *obj, const struct iattr *attr,
1419 unsigned int attr_flags);
1421 extern struct lu_env *cl_inode_fini_env;
1422 extern __u16 cl_inode_fini_refcheck;
1424 int cl_file_inode_init(struct inode *inode, struct lustre_md *md);
1425 void cl_inode_fini(struct inode *inode);
1427 u64 cl_fid_build_ino(const struct lu_fid *fid, int api32);
1428 u32 cl_fid_build_gen(const struct lu_fid *fid);
1430 #endif /* LLITE_INTERNAL_H */