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, 2015, 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>
43 #include <lustre_linkea.h>
45 /* for struct cl_lock_descr and struct cl_io */
46 #include <cl_object.h>
47 #include <lustre_lmv.h>
48 #include <lustre_mdc.h>
49 #include <lustre_intent.h>
50 #include <linux/compat.h>
51 #include <linux/aio.h>
53 #include "vvp_internal.h"
54 #include "range_lock.h"
60 #ifndef VM_FAULT_RETRY
61 #define VM_FAULT_RETRY 0
64 /* Kernel 3.1 kills LOOKUP_CONTINUE, LOOKUP_PARENT is equivalent to it.
65 * seem kernel commit 49084c3bb2055c401f3493c13edae14d49128ca0 */
66 #ifndef LOOKUP_CONTINUE
67 #define LOOKUP_CONTINUE LOOKUP_PARENT
70 /** Only used on client-side for indicating the tail of dir hash/offset. */
71 #define LL_DIR_END_OFF 0x7fffffffffffffffULL
72 #define LL_DIR_END_OFF_32BIT 0x7fffffffUL
74 /* 4UL * 1024 * 1024 */
75 #define LL_MAX_BLKSIZE_BITS 22
77 #define LL_IT2STR(it) ((it) ? ldlm_it2str((it)->it_op) : "0")
78 #define LUSTRE_FPRIVATE(file) ((file)->private_data)
80 struct ll_dentry_data {
81 struct lookup_intent *lld_it;
82 unsigned int lld_sa_generation;
83 unsigned int lld_invalid:1;
84 unsigned int lld_nfs_dentry:1;
85 struct rcu_head lld_rcu_head;
88 #define ll_d2d(de) ((struct ll_dentry_data*)((de)->d_fsdata))
90 #define LLI_INODE_MAGIC 0x111d0de5
91 #define LLI_INODE_DEAD 0xdeadd00d
93 struct ll_getname_data {
94 #ifdef HAVE_DIR_CONTEXT
95 struct dir_context ctx;
97 char *lgd_name; /* points to a buffer with NAME_MAX+1 size */
98 struct lu_fid lgd_fid; /* target fid we are looking for */
99 int lgd_found; /* inode matched? */
102 struct ll_grouplock {
103 struct lu_env *lg_env;
105 struct cl_lock *lg_lock;
106 unsigned long lg_gid;
109 struct ll_inode_info {
110 __u32 lli_inode_magic;
113 volatile unsigned long lli_flags;
114 struct posix_acl *lli_posix_acl;
116 /* identifying fields for both metadata and data stacks. */
117 struct lu_fid lli_fid;
118 /* master inode fid for stripe directory */
119 struct lu_fid lli_pfid;
121 /* We need all three because every inode may be opened in different
123 struct obd_client_handle *lli_mds_read_och;
124 struct obd_client_handle *lli_mds_write_och;
125 struct obd_client_handle *lli_mds_exec_och;
126 __u64 lli_open_fd_read_count;
127 __u64 lli_open_fd_write_count;
128 __u64 lli_open_fd_exec_count;
129 /* Protects access to och pointers and their usage counters */
130 struct mutex lli_och_mutex;
132 struct inode lli_vfs_inode;
134 /* the most recent timestamps obtained from mds */
138 spinlock_t lli_agl_lock;
140 /* Try to make the d::member and f::member are aligned. Before using
141 * these members, make clear whether it is directory or not. */
145 /* serialize normal readdir and statahead-readdir. */
146 struct mutex lli_readdir_mutex;
148 /* metadata statahead */
149 /* since parent-child threads can share the same @file
150 * struct, "opendir_key" is the token when dir close for
151 * case of parent exit before child -- it is me should
152 * cleanup the dir readahead. */
153 void *lli_opendir_key;
154 struct ll_statahead_info *lli_sai;
155 /* protect statahead stuff. */
156 spinlock_t lli_sa_lock;
157 /* "opendir_pid" is the token when lookup/revalid
158 * -- I am the owner of dir statahead. */
159 pid_t lli_opendir_pid;
160 /* stat will try to access statahead entries or start
161 * statahead if this flag is set, and this flag will be
162 * set upon dir open, and cleared when dir is closed,
163 * statahead hit ratio is too low, or start statahead
165 unsigned int lli_sa_enabled:1;
166 /* generation for statahead */
167 unsigned int lli_sa_generation;
168 /* directory stripe information */
169 struct lmv_stripe_md *lli_lsm_md;
170 /* default directory stripe offset. This is extracted
171 * from the "dmv" xattr in order to decide which MDT to
172 * create a subdirectory on. The MDS itself fetches
173 * "dmv" and gets the rest of the default layout itself
174 * (count, hash, etc). */
175 __u32 lli_def_stripe_offset;
178 /* for non-directory */
180 struct mutex lli_size_mutex;
181 char *lli_symlink_name;
183 * struct rw_semaphore {
184 * signed long count; // align d.d_def_acl
185 * spinlock_t wait_lock; // align d.d_sa_lock
186 * struct list_head wait_list;
189 struct rw_semaphore lli_trunc_sem;
190 struct range_lock_tree lli_write_tree;
192 struct rw_semaphore lli_glimpse_sem;
193 cfs_time_t lli_glimpse_time;
194 struct list_head lli_agl_list;
197 /* for writepage() only to communicate to fsync */
201 * whenever a process try to read/write the file, the
202 * jobid of the process will be saved here, and it'll
203 * be packed into the write PRC when flush later.
205 * so the read/write statistics for jobid will not be
206 * accurate if the file is shared by different jobs.
208 char lli_jobid[LUSTRE_JOBID_SIZE];
212 /* XXX: For following frequent used members, although they maybe special
213 * used for non-directory object, it is some time-wasting to check
214 * whether the object is directory or not before using them. On the
215 * other hand, currently, sizeof(f) > sizeof(d), it cannot reduce
216 * the "ll_inode_info" size even if moving those members into u.f.
217 * So keep them out side.
219 * In the future, if more members are added only for directory,
220 * some of the following members can be moved into u.f.
222 struct cl_object *lli_clob;
224 /* mutex to request for layout lock exclusively. */
225 struct mutex lli_layout_mutex;
226 /* Layout version, protected by lli_layout_lock */
227 __u32 lli_layout_gen;
228 spinlock_t lli_layout_lock;
230 struct rw_semaphore lli_xattrs_list_rwsem;
231 struct mutex lli_xattrs_enq_lock;
232 struct list_head lli_xattrs; /* ll_xattr_entry->xe_list */
235 static inline __u32 ll_layout_version_get(struct ll_inode_info *lli)
239 spin_lock(&lli->lli_layout_lock);
240 gen = lli->lli_layout_gen;
241 spin_unlock(&lli->lli_layout_lock);
246 static inline void ll_layout_version_set(struct ll_inode_info *lli, __u32 gen)
248 spin_lock(&lli->lli_layout_lock);
249 lli->lli_layout_gen = gen;
250 spin_unlock(&lli->lli_layout_lock);
254 /* File data is modified. */
255 LLIF_DATA_MODIFIED = 0,
256 /* File is being restored */
257 LLIF_FILE_RESTORING = 1,
258 /* Xattr cache is attached to the file */
259 LLIF_XATTR_CACHE = 2,
262 static inline void ll_file_set_flag(struct ll_inode_info *lli,
263 enum ll_file_flags flag)
265 set_bit(flag, &lli->lli_flags);
268 static inline void ll_file_clear_flag(struct ll_inode_info *lli,
269 enum ll_file_flags flag)
271 clear_bit(flag, &lli->lli_flags);
274 static inline bool ll_file_test_flag(struct ll_inode_info *lli,
275 enum ll_file_flags flag)
277 return test_bit(flag, &lli->lli_flags);
280 static inline bool ll_file_test_and_clear_flag(struct ll_inode_info *lli,
281 enum ll_file_flags flag)
283 return test_and_clear_bit(flag, &lli->lli_flags);
286 int ll_xattr_cache_destroy(struct inode *inode);
288 int ll_xattr_cache_get(struct inode *inode,
294 int ll_init_security(struct dentry *dentry,
299 * Locking to guarantee consistency of non-atomic updates to long long i_size,
300 * consistency between file size and KMS.
302 * Implemented by ->lli_size_mutex and ->lsm_lock, nested in that order.
305 void ll_inode_size_lock(struct inode *inode);
306 void ll_inode_size_unlock(struct inode *inode);
308 // FIXME: replace the name of this with LL_I to conform to kernel stuff
309 // static inline struct ll_inode_info *LL_I(struct inode *inode)
310 static inline struct ll_inode_info *ll_i2info(struct inode *inode)
312 return container_of(inode, struct ll_inode_info, lli_vfs_inode);
315 /* default to about 64M of readahead on a given system. */
316 #define SBI_DEFAULT_READAHEAD_MAX (64UL << (20 - PAGE_CACHE_SHIFT))
318 /* default to read-ahead full files smaller than 2MB on the second read */
319 #define SBI_DEFAULT_READAHEAD_WHOLE_MAX (2UL << (20 - PAGE_CACHE_SHIFT))
324 RA_STAT_DISTANT_READPAGE,
325 RA_STAT_MISS_IN_WINDOW,
326 RA_STAT_FAILED_GRAB_PAGE,
327 RA_STAT_FAILED_MATCH,
332 RA_STAT_MAX_IN_FLIGHT,
333 RA_STAT_WRONG_GRAB_PAGE,
334 RA_STAT_FAILED_REACH_END,
339 atomic_t ra_cur_pages;
340 unsigned long ra_max_pages;
341 unsigned long ra_max_pages_per_file;
342 unsigned long ra_max_read_ahead_whole_pages;
345 /* ra_io_arg will be filled in the beginning of ll_readahead with
346 * ras_lock, then the following ll_read_ahead_pages will read RA
347 * pages according to this arg, all the items in this structure are
348 * counted by page index.
351 unsigned long ria_start; /* start offset of read-ahead*/
352 unsigned long ria_end; /* end offset of read-ahead*/
353 unsigned long ria_reserved; /* reserved pages for read-ahead */
354 unsigned long ria_end_min; /* minimum end to cover current read */
355 bool ria_eof; /* reach end of file */
356 /* If stride read pattern is detected, ria_stoff means where
357 * stride read is started. Note: for normal read-ahead, the
358 * value here is meaningless, and also it will not be accessed*/
360 /* ria_length and ria_pages are the length and pages length in the
361 * stride I/O mode. And they will also be used to check whether
362 * it is stride I/O read-ahead in the read-ahead pages*/
363 unsigned long ria_length;
364 unsigned long ria_pages;
367 /* LL_HIST_MAX=32 causes an overflow */
368 #define LL_HIST_MAX 28
369 #define LL_HIST_START 12 /* buckets start at 2^12 = 4k */
370 #define LL_PROCESS_HIST_MAX 10
371 struct per_process_info {
373 struct obd_histogram pp_r_hist;
374 struct obd_histogram pp_w_hist;
377 /* pp_extents[LL_PROCESS_HIST_MAX] will hold the combined process info */
378 struct ll_rw_extents_info {
379 struct per_process_info pp_extents[LL_PROCESS_HIST_MAX + 1];
382 #define LL_OFFSET_HIST_MAX 100
383 struct ll_rw_process_info {
386 loff_t rw_range_start;
388 loff_t rw_last_file_pos;
390 size_t rw_smallest_extent;
391 size_t rw_largest_extent;
392 struct ll_file_data *rw_last_file;
395 enum stats_track_type {
396 STATS_TRACK_ALL = 0, /* track all processes */
397 STATS_TRACK_PID, /* track process with this pid */
398 STATS_TRACK_PPID, /* track processes with this ppid */
399 STATS_TRACK_GID, /* track processes with this gid */
403 /* flags for sbi->ll_flags */
404 #define LL_SBI_NOLCK 0x01 /* DLM locking disabled (directio-only) */
405 #define LL_SBI_CHECKSUM 0x02 /* checksum each page as it's written */
406 #define LL_SBI_FLOCK 0x04
407 #define LL_SBI_USER_XATTR 0x08 /* support user xattr */
408 #define LL_SBI_ACL 0x10 /* support ACL */
409 /* LL_SBI_RMT_CLIENT 0x40 remote client */
410 #define LL_SBI_MDS_CAPA 0x80 /* support mds capa, obsolete */
411 #define LL_SBI_OSS_CAPA 0x100 /* support oss capa, obsolete */
412 #define LL_SBI_LOCALFLOCK 0x200 /* Local flocks support by kernel */
413 #define LL_SBI_LRU_RESIZE 0x400 /* lru resize support */
414 #define LL_SBI_LAZYSTATFS 0x800 /* lazystatfs mount option */
415 /* LL_SBI_SOM_PREVIEW 0x1000 SOM preview mount option, obsolete */
416 #define LL_SBI_32BIT_API 0x2000 /* generate 32 bit inodes. */
417 #define LL_SBI_64BIT_HASH 0x4000 /* support 64-bits dir hash/offset */
418 #define LL_SBI_AGL_ENABLED 0x8000 /* enable agl */
419 #define LL_SBI_VERBOSE 0x10000 /* verbose mount/umount */
420 #define LL_SBI_LAYOUT_LOCK 0x20000 /* layout lock support */
421 #define LL_SBI_USER_FID2PATH 0x40000 /* allow fid2path by unprivileged users */
422 #define LL_SBI_XATTR_CACHE 0x80000 /* support for xattr cache */
423 #define LL_SBI_NOROOTSQUASH 0x100000 /* do not apply root squash */
424 #define LL_SBI_ALWAYS_PING 0x200000 /* always ping even if server
426 #define LL_SBI_FAST_READ 0x400000 /* fast read support */
428 #define LL_SBI_FLAGS { \
454 /* This is embedded into llite super-blocks to keep track of connect
455 * flags (capabilities) supported by all imports given mount is
457 struct lustre_client_ocd {
458 /* This is conjunction of connect_flags across all imports
459 * (LOVs) this mount is connected to. This field is updated by
460 * cl_ocd_update() under ->lco_lock. */
462 struct mutex lco_lock;
463 struct obd_export *lco_md_exp;
464 struct obd_export *lco_dt_exp;
468 /* this protects pglist and ra_info. It isn't safe to
469 * grab from interrupt contexts */
471 spinlock_t ll_pp_extent_lock; /* pp_extent entry*/
472 spinlock_t ll_process_lock; /* ll_rw_process_info */
473 struct obd_uuid ll_sb_uuid;
474 struct obd_export *ll_md_exp;
475 struct obd_export *ll_dt_exp;
476 struct proc_dir_entry* ll_proc_root;
477 struct lu_fid ll_root_fid; /* root object fid */
480 unsigned int ll_umounting:1,
481 ll_xattr_cache_enabled:1,
482 ll_client_common_fill_super_succeeded:1;
484 struct lustre_client_ocd ll_lco;
486 struct lprocfs_stats *ll_stats; /* lprocfs stats counter */
488 /* Used to track "unstable" pages on a client, and maintain a
489 * LRU list of clean pages. An "unstable" page is defined as
490 * any page which is sent to a server as part of a bulk request,
491 * but is uncommitted to stable storage. */
492 struct cl_client_cache *ll_cache;
494 struct lprocfs_stats *ll_ra_stats;
496 struct ll_ra_info ll_ra_info;
497 unsigned int ll_namelen;
498 struct file_operations *ll_fop;
500 unsigned int ll_md_brw_pages; /* readdir pages per RPC */
502 struct lu_site *ll_site;
503 struct cl_device *ll_cl;
505 struct ll_rw_extents_info ll_rw_extents_info;
506 int ll_extent_process_count;
507 struct ll_rw_process_info ll_rw_process_info[LL_PROCESS_HIST_MAX];
508 unsigned int ll_offset_process_count;
509 struct ll_rw_process_info ll_rw_offset_info[LL_OFFSET_HIST_MAX];
510 unsigned int ll_rw_offset_entry_count;
511 int ll_stats_track_id;
512 enum stats_track_type ll_stats_track_type;
515 /* metadata stat-ahead */
516 unsigned int ll_sa_max; /* max statahead RPCs */
517 atomic_t ll_sa_total; /* statahead thread started
519 atomic_t ll_sa_wrong; /* statahead thread stopped for
521 atomic_t ll_sa_running; /* running statahead thread
523 atomic_t ll_agl_total; /* AGL thread started count */
525 dev_t ll_sdev_orig; /* save s_dev before assign for
528 struct root_squash_info ll_squash;
532 * per file-descriptor read-ahead data.
534 struct ll_readahead_state {
537 * index of the last page that read(2) needed and that wasn't in the
538 * cache. Used by ras_update() to detect seeks.
540 * XXX nikita: if access seeks into cached region, Lustre doesn't see
543 unsigned long ras_last_readpage;
545 * number of pages read after last read-ahead window reset. As window
546 * is reset on each seek, this is effectively a number of consecutive
547 * accesses. Maybe ->ras_accessed_in_window is better name.
549 * XXX nikita: window is also reset (by ras_update()) when Lustre
550 * believes that memory pressure evicts read-ahead pages. In that
551 * case, it probably doesn't make sense to expand window to
552 * PTLRPC_MAX_BRW_PAGES on the third access.
554 unsigned long ras_consecutive_pages;
556 * number of read requests after the last read-ahead window reset
557 * As window is reset on each seek, this is effectively the number
558 * on consecutive read request and is used to trigger read-ahead.
560 unsigned long ras_consecutive_requests;
562 * Parameters of current read-ahead window. Handled by
563 * ras_update(). On the initial access to the file or after a seek,
564 * window is reset to 0. After 3 consecutive accesses, window is
565 * expanded to PTLRPC_MAX_BRW_PAGES. Afterwards, window is enlarged by
566 * PTLRPC_MAX_BRW_PAGES chunks up to ->ra_max_pages.
568 unsigned long ras_window_start, ras_window_len;
570 * Optimal RPC size. It decides how many pages will be sent
571 * for each read-ahead.
573 unsigned long ras_rpc_size;
575 * Where next read-ahead should start at. This lies within read-ahead
576 * window. Read-ahead window is read in pieces rather than at once
577 * because: 1. lustre limits total number of pages under read-ahead by
578 * ->ra_max_pages (see ll_ra_count_get()), 2. client cannot read pages
579 * not covered by DLM lock.
581 unsigned long ras_next_readahead;
583 * Total number of ll_file_read requests issued, reads originating
584 * due to mmap are not counted in this total. This value is used to
585 * trigger full file read-ahead after multiple reads to a small file.
587 unsigned long ras_requests;
589 * Page index with respect to the current request, these value
590 * will not be accurate when dealing with reads issued via mmap.
592 unsigned long ras_request_index;
594 * The following 3 items are used for detecting the stride I/O
596 * In stride I/O mode,
597 * ...............|-----data-----|****gap*****|--------|******|....
598 * offset |-stride_pages-|-stride_gap-|
599 * ras_stride_offset = offset;
600 * ras_stride_length = stride_pages + stride_gap;
601 * ras_stride_pages = stride_pages;
602 * Note: all these three items are counted by pages.
604 unsigned long ras_stride_length;
605 unsigned long ras_stride_pages;
606 pgoff_t ras_stride_offset;
608 * number of consecutive stride request count, and it is similar as
609 * ras_consecutive_requests, but used for stride I/O mode.
610 * Note: only more than 2 consecutive stride request are detected,
611 * stride read-ahead will be enable
613 unsigned long ras_consecutive_stride_requests;
616 extern struct kmem_cache *ll_file_data_slab;
617 struct lustre_handle;
618 struct ll_file_data {
619 struct ll_readahead_state fd_ras;
620 struct ll_grouplock fd_grouplock;
624 /* openhandle if lease exists for this file.
625 * Borrow lli->lli_och_mutex to protect assignment */
626 struct obd_client_handle *fd_lease_och;
627 struct obd_client_handle *fd_och;
628 struct file *fd_file;
629 /* Indicate whether need to report failure when close.
630 * true: failure is known, not report again.
631 * false: unknown failure, should report. */
632 bool fd_write_failed;
633 rwlock_t fd_lock; /* protect lcc list */
634 struct list_head fd_lccs; /* list of ll_cl_context */
637 extern spinlock_t inode_lock;
639 extern struct proc_dir_entry *proc_lustre_fs_root;
641 static inline struct inode *ll_info2i(struct ll_inode_info *lli)
643 return &lli->lli_vfs_inode;
646 __u32 ll_i2suppgid(struct inode *i);
647 void ll_i2gids(__u32 *suppgids, struct inode *i1,struct inode *i2);
649 static inline int ll_need_32bit_api(struct ll_sb_info *sbi)
651 #if BITS_PER_LONG == 32
653 #elif defined(CONFIG_COMPAT)
654 return unlikely(is_compat_task() || (sbi->ll_flags & LL_SBI_32BIT_API));
656 return unlikely(sbi->ll_flags & LL_SBI_32BIT_API);
660 static inline bool ll_sbi_has_fast_read(struct ll_sb_info *sbi)
662 return !!(sbi->ll_flags & LL_SBI_FAST_READ);
665 void ll_ras_enter(struct file *f);
667 /* llite/lcommon_misc.c */
668 int cl_ocd_update(struct obd_device *host, struct obd_device *watched,
669 enum obd_notify_event ev, void *owner, void *data);
670 int cl_get_grouplock(struct cl_object *obj, unsigned long gid, int nonblock,
671 struct ll_grouplock *lg);
672 void cl_put_grouplock(struct ll_grouplock *lg);
674 /* llite/lproc_llite.c */
675 #ifdef CONFIG_PROC_FS
676 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
677 struct super_block *sb, char *osc, char *mdc);
678 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi);
679 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count);
680 extern struct lprocfs_vars lprocfs_llite_obd_vars[];
682 static inline int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
683 struct super_block *sb, char *osc, char *mdc){return 0;}
684 static inline void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi) {}
685 static void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count) {}
690 LPROC_LL_DIRTY_MISSES,
692 LPROC_LL_WRITE_BYTES,
717 LPROC_LL_ALLOC_INODE,
720 LPROC_LL_GETXATTR_HITS,
722 LPROC_LL_REMOVEXATTR,
724 LPROC_LL_FILE_OPCODES
728 struct ll_dir_chain {
731 static inline void ll_dir_chain_init(struct ll_dir_chain *chain)
735 static inline void ll_dir_chain_fini(struct ll_dir_chain *chain)
739 extern const struct file_operations ll_dir_operations;
740 extern const struct inode_operations ll_dir_inode_operations;
741 #ifdef HAVE_DIR_CONTEXT
742 int ll_dir_read(struct inode *inode, __u64 *pos, struct md_op_data *op_data,
743 struct dir_context *ctx);
745 int ll_dir_read(struct inode *inode, __u64 *pos, struct md_op_data *op_data,
746 void *cookie, filldir_t filldir);
748 int ll_get_mdt_idx(struct inode *inode);
749 int ll_get_mdt_idx_by_fid(struct ll_sb_info *sbi, const struct lu_fid *fid);
750 struct page *ll_get_dir_page(struct inode *dir, struct md_op_data *op_data,
751 __u64 offset, struct ll_dir_chain *chain);
752 void ll_release_page(struct inode *inode, struct page *page, bool remove);
755 extern const struct inode_operations ll_special_inode_operations;
757 struct inode *ll_iget(struct super_block *sb, ino_t hash,
758 struct lustre_md *lic);
759 int ll_test_inode_by_fid(struct inode *inode, void *opaque);
760 int ll_md_blocking_ast(struct ldlm_lock *, struct ldlm_lock_desc *,
761 void *data, int flag);
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 void ll_update_times(struct ptlrpc_request *request, struct inode *inode);
767 int ll_writepage(struct page *page, struct writeback_control *wbc);
768 int ll_writepages(struct address_space *, struct writeback_control *wbc);
769 int ll_readpage(struct file *file, struct page *page);
770 void ll_readahead_init(struct inode *inode, struct ll_readahead_state *ras);
771 int vvp_io_write_commit(const struct lu_env *env, struct cl_io *io);
774 void ll_cl_add(struct file *file, const struct lu_env *env, struct cl_io *io,
776 void ll_cl_remove(struct file *file, const struct lu_env *env);
777 struct ll_cl_context *ll_cl_find(struct file *file);
779 extern const struct address_space_operations ll_aops;
782 extern struct file_operations ll_file_operations;
783 extern struct file_operations ll_file_operations_flock;
784 extern struct file_operations ll_file_operations_noflock;
785 extern struct inode_operations ll_file_inode_operations;
786 extern int ll_have_md_lock(struct inode *inode, __u64 *bits,
787 enum ldlm_mode l_req_mode);
788 extern enum ldlm_mode ll_take_md_lock(struct inode *inode, __u64 bits,
789 struct lustre_handle *lockh, __u64 flags,
790 enum ldlm_mode mode);
792 int ll_file_open(struct inode *inode, struct file *file);
793 int ll_file_release(struct inode *inode, struct file *file);
794 int ll_release_openhandle(struct dentry *, struct lookup_intent *);
795 int ll_md_real_close(struct inode *inode, fmode_t fmode);
796 extern void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
797 struct ll_file_data *file, loff_t pos,
798 size_t count, int rw);
799 int ll_getattr(struct vfsmount *mnt, struct dentry *de, struct kstat *stat);
800 struct posix_acl *ll_get_acl(struct inode *inode, int type);
801 int ll_migrate(struct inode *parent, struct file *file, int mdtidx,
802 const char *name, int namelen);
803 int ll_get_fid_by_name(struct inode *parent, const char *name,
804 int namelen, struct lu_fid *fid, struct inode **inode);
805 #ifdef HAVE_GENERIC_PERMISSION_4ARGS
806 int ll_inode_permission(struct inode *inode, int mask, unsigned int flags);
808 # ifndef HAVE_INODE_PERMISION_2ARGS
809 int ll_inode_permission(struct inode *inode, int mask, struct nameidata *nd);
811 int ll_inode_permission(struct inode *inode, int mask);
815 int ll_lov_setstripe_ea_info(struct inode *inode, struct file *file,
816 __u64 flags, struct lov_user_md *lum,
818 int ll_lov_getstripe_ea_info(struct inode *inode, const char *filename,
819 struct lov_mds_md **lmm, int *lmm_size,
820 struct ptlrpc_request **request);
821 int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump,
823 int ll_dir_getstripe(struct inode *inode, void **lmmp,
824 int *lmm_size, struct ptlrpc_request **request,
826 #ifdef HAVE_FILE_FSYNC_4ARGS
827 int ll_fsync(struct file *file, loff_t start, loff_t end, int data);
828 #elif defined(HAVE_FILE_FSYNC_2ARGS)
829 int ll_fsync(struct file *file, int data);
831 int ll_fsync(struct file *file, struct dentry *dentry, int data);
833 int ll_merge_attr(const struct lu_env *env, struct inode *inode);
834 int ll_fid2path(struct inode *inode, void __user *arg);
835 int ll_data_version(struct inode *inode, __u64 *data_version, int flags);
836 int ll_hsm_release(struct inode *inode);
837 int ll_hsm_state_set(struct inode *inode, struct hsm_state_set *hss);
841 int ll_d_init(struct dentry *de);
842 extern const struct dentry_operations ll_d_ops;
843 void ll_intent_drop_lock(struct lookup_intent *);
844 void ll_intent_release(struct lookup_intent *);
845 void ll_invalidate_aliases(struct inode *);
846 void ll_lookup_finish_locks(struct lookup_intent *it, struct dentry *dentry);
847 int ll_revalidate_it_finish(struct ptlrpc_request *request,
848 struct lookup_intent *it, struct dentry *de);
850 /* llite/llite_lib.c */
851 extern struct super_operations lustre_super_operations;
853 void ll_lli_init(struct ll_inode_info *lli);
854 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt);
855 void ll_put_super(struct super_block *sb);
856 void ll_kill_super(struct super_block *sb);
857 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock);
858 void ll_dir_clear_lsm_md(struct inode *inode);
859 void ll_clear_inode(struct inode *inode);
860 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr, bool hsm_import);
861 int ll_setattr(struct dentry *de, struct iattr *attr);
862 int ll_statfs(struct dentry *de, struct kstatfs *sfs);
863 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
864 __u64 max_age, __u32 flags);
865 int ll_update_inode(struct inode *inode, struct lustre_md *md);
866 int ll_read_inode2(struct inode *inode, void *opaque);
867 void ll_delete_inode(struct inode *inode);
868 int ll_iocontrol(struct inode *inode, struct file *file,
869 unsigned int cmd, unsigned long arg);
870 int ll_flush_ctx(struct inode *inode);
871 void ll_umount_begin(struct super_block *sb);
872 int ll_remount_fs(struct super_block *sb, int *flags, char *data);
873 #ifdef HAVE_SUPEROPS_USE_DENTRY
874 int ll_show_options(struct seq_file *seq, struct dentry *dentry);
876 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs);
878 void ll_dirty_page_discard_warn(struct page *page, int ioret);
879 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
880 struct super_block *, struct lookup_intent *);
881 void lustre_dump_dentry(struct dentry *, int recur);
882 int ll_obd_statfs(struct inode *inode, void __user *arg);
883 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *max_mdsize);
884 int ll_get_default_mdsize(struct ll_sb_info *sbi, int *default_mdsize);
885 int ll_set_default_mdsize(struct ll_sb_info *sbi, int default_mdsize);
886 int ll_process_config(struct lustre_cfg *lcfg);
889 LUSTRE_OPC_MKDIR = 0,
890 LUSTRE_OPC_SYMLINK = 1,
891 LUSTRE_OPC_MKNOD = 2,
892 LUSTRE_OPC_CREATE = 3,
896 struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
897 struct inode *i1, struct inode *i2,
898 const char *name, size_t namelen,
899 __u32 mode, __u32 opc, void *data);
900 void ll_finish_md_op_data(struct md_op_data *op_data);
901 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg);
902 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen);
903 void ll_compute_rootsquash_state(struct ll_sb_info *sbi);
904 ssize_t ll_copy_user_md(const struct lov_user_md __user *md,
905 struct lov_user_md **kbuf);
906 void ll_open_cleanup(struct super_block *sb, struct ptlrpc_request *open_req);
908 /* Compute expected user md size when passing in a md from user space */
909 static inline ssize_t ll_lov_user_md_size(const struct lov_user_md *lum)
911 switch (lum->lmm_magic) {
912 case LOV_USER_MAGIC_V1:
913 return sizeof(struct lov_user_md_v1);
914 case LOV_USER_MAGIC_V3:
915 return sizeof(struct lov_user_md_v3);
916 case LOV_USER_MAGIC_SPECIFIC:
917 if (lum->lmm_stripe_count > LOV_MAX_STRIPE_COUNT)
920 return lov_user_md_size(lum->lmm_stripe_count,
921 LOV_USER_MAGIC_SPECIFIC);
927 /* llite/llite_nfs.c */
928 extern struct export_operations lustre_export_operations;
929 __u32 get_uuid2int(const char *name, int len);
930 struct inode *search_inode_for_lustre(struct super_block *sb,
931 const struct lu_fid *fid);
932 int ll_dir_get_parent_fid(struct inode *dir, struct lu_fid *parent_fid);
934 /* llite/symlink.c */
935 extern struct inode_operations ll_fast_symlink_inode_operations;
938 * IO arguments for various VFS I/O interfaces.
941 /** normal/sendfile/splice */
942 enum vvp_io_subtype via_io_subtype;
946 struct kiocb *via_iocb;
947 struct iov_iter *via_iter;
950 struct pipe_inode_info *via_pipe;
951 unsigned int via_flags;
961 struct ll_cl_context {
962 struct list_head lcc_list;
964 const struct lu_env *lcc_env;
965 struct cl_io *lcc_io;
966 struct cl_page *lcc_page;
967 enum lcc_type lcc_type;
970 struct ll_thread_info {
971 struct iov_iter lti_iter;
972 struct vvp_io_args lti_args;
973 struct ra_io_arg lti_ria;
974 struct kiocb lti_kiocb;
975 struct ll_cl_context lti_io_ctx;
978 extern struct lu_context_key ll_thread_key;
980 static inline struct ll_thread_info *ll_env_info(const struct lu_env *env)
982 struct ll_thread_info *lti;
984 lti = lu_context_key_get(&env->le_ctx, &ll_thread_key);
985 LASSERT(lti != NULL);
990 static inline struct vvp_io_args *ll_env_args(const struct lu_env *env,
991 enum vvp_io_subtype type)
993 struct vvp_io_args *via = &ll_env_info(env)->lti_args;
995 via->via_io_subtype = type;
1000 /* llite/llite_mmap.c */
1002 int ll_teardown_mmaps(struct address_space *mapping, __u64 first, __u64 last);
1003 int ll_file_mmap(struct file * file, struct vm_area_struct * vma);
1004 void policy_from_vma(union ldlm_policy_data *policy, struct vm_area_struct *vma,
1005 unsigned long addr, size_t count);
1006 struct vm_area_struct *our_vma(struct mm_struct *mm, unsigned long addr,
1009 static inline void ll_invalidate_page(struct page *vmpage)
1011 struct address_space *mapping = vmpage->mapping;
1012 loff_t offset = vmpage->index << PAGE_CACHE_SHIFT;
1014 LASSERT(PageLocked(vmpage));
1015 if (mapping == NULL)
1019 * truncate_complete_page() calls
1020 * a_ops->invalidatepage()->cl_page_delete()->vvp_page_delete().
1022 ll_teardown_mmaps(mapping, offset, offset + PAGE_CACHE_SIZE);
1023 truncate_complete_page(mapping, vmpage);
1026 #define ll_s2sbi(sb) (s2lsi(sb)->lsi_llsbi)
1028 /* don't need an addref as the sb_info should be holding one */
1029 static inline struct obd_export *ll_s2dtexp(struct super_block *sb)
1031 return ll_s2sbi(sb)->ll_dt_exp;
1034 /* don't need an addref as the sb_info should be holding one */
1035 static inline struct obd_export *ll_s2mdexp(struct super_block *sb)
1037 return ll_s2sbi(sb)->ll_md_exp;
1040 static inline struct client_obd *sbi2mdc(struct ll_sb_info *sbi)
1042 struct obd_device *obd = sbi->ll_md_exp->exp_obd;
1048 // FIXME: replace the name of this with LL_SB to conform to kernel stuff
1049 static inline struct ll_sb_info *ll_i2sbi(struct inode *inode)
1051 return ll_s2sbi(inode->i_sb);
1054 static inline struct obd_export *ll_i2dtexp(struct inode *inode)
1056 return ll_s2dtexp(inode->i_sb);
1059 static inline struct obd_export *ll_i2mdexp(struct inode *inode)
1061 return ll_s2mdexp(inode->i_sb);
1064 static inline struct lu_fid *ll_inode2fid(struct inode *inode)
1068 LASSERT(inode != NULL);
1069 fid = &ll_i2info(inode)->lli_fid;
1074 static inline loff_t ll_file_maxbytes(struct inode *inode)
1076 struct cl_object *obj = ll_i2info(inode)->lli_clob;
1079 return MAX_LFS_FILESIZE;
1081 return min_t(loff_t, cl_object_maxbytes(obj), MAX_LFS_FILESIZE);
1085 int ll_setxattr(struct dentry *dentry, const char *name,
1086 const void *value, size_t size, int flags);
1087 ssize_t ll_getxattr(struct dentry *dentry, const char *name,
1088 void *buffer, size_t size);
1089 ssize_t ll_listxattr(struct dentry *dentry, char *buffer, size_t size);
1090 int ll_removexattr(struct dentry *dentry, const char *name);
1093 * Common IO arguments for various VFS I/O interfaces.
1095 int cl_sb_init(struct super_block *sb);
1096 int cl_sb_fini(struct super_block *sb);
1098 enum ras_update_flags {
1102 void ll_ra_count_put(struct ll_sb_info *sbi, unsigned long len);
1103 void ll_ra_stats_inc(struct inode *inode, enum ra_stat which);
1107 #define LL_SA_RPC_MIN 2
1108 #define LL_SA_RPC_DEF 32
1109 #define LL_SA_RPC_MAX 8192
1111 #define LL_SA_CACHE_BIT 5
1112 #define LL_SA_CACHE_SIZE (1 << LL_SA_CACHE_BIT)
1113 #define LL_SA_CACHE_MASK (LL_SA_CACHE_SIZE - 1)
1115 /* per inode struct, for dir only */
1116 struct ll_statahead_info {
1117 struct dentry *sai_dentry;
1118 atomic_t sai_refcount; /* when access this struct, hold
1120 unsigned int sai_max; /* max ahead of lookup */
1121 __u64 sai_sent; /* stat requests sent count */
1122 __u64 sai_replied; /* stat requests which received
1124 __u64 sai_index; /* index of statahead entry */
1125 __u64 sai_index_wait; /* index of entry which is the
1126 * caller is waiting for */
1127 __u64 sai_hit; /* hit count */
1128 __u64 sai_miss; /* miss count:
1129 * for "ls -al" case, includes
1130 * hidden dentry miss;
1131 * for "ls -l" case, it does not
1132 * include hidden dentry miss.
1133 * "sai_miss_hidden" is used for
1136 unsigned int sai_consecutive_miss; /* consecutive miss */
1137 unsigned int sai_miss_hidden;/* "ls -al", but first dentry
1138 * is not a hidden one */
1139 unsigned int sai_skip_hidden;/* skipped hidden dentry count
1141 unsigned int sai_ls_all:1, /* "ls -al", do stat-ahead for
1143 sai_agl_valid:1,/* AGL is valid for the dir */
1144 sai_in_readpage:1;/* statahead is in readdir()*/
1145 wait_queue_head_t sai_waitq; /* stat-ahead wait queue */
1146 struct ptlrpc_thread sai_thread; /* stat-ahead thread */
1147 struct ptlrpc_thread sai_agl_thread; /* AGL thread */
1148 struct list_head sai_interim_entries; /* entries which got async
1149 * stat reply, but not
1151 struct list_head sai_entries; /* completed entries */
1152 struct list_head sai_agls; /* AGLs to be sent */
1153 struct list_head sai_cache[LL_SA_CACHE_SIZE];
1154 spinlock_t sai_cache_lock[LL_SA_CACHE_SIZE];
1155 atomic_t sai_cache_count; /* entry count in cache */
1158 int ll_statahead(struct inode *dir, struct dentry **dentry, bool unplug);
1159 void ll_authorize_statahead(struct inode *dir, void *key);
1160 void ll_deauthorize_statahead(struct inode *dir, void *key);
1163 blkcnt_t dirty_cnt(struct inode *inode);
1165 int cl_glimpse_size0(struct inode *inode, int agl);
1166 int cl_glimpse_lock(const struct lu_env *env, struct cl_io *io,
1167 struct inode *inode, struct cl_object *clob, int agl);
1169 static inline int cl_glimpse_size(struct inode *inode)
1171 return cl_glimpse_size0(inode, 0);
1174 static inline int cl_agl(struct inode *inode)
1176 return cl_glimpse_size0(inode, 1);
1179 static inline int ll_glimpse_size(struct inode *inode)
1181 struct ll_inode_info *lli = ll_i2info(inode);
1184 down_read(&lli->lli_glimpse_sem);
1185 rc = cl_glimpse_size(inode);
1186 lli->lli_glimpse_time = cfs_time_current();
1187 up_read(&lli->lli_glimpse_sem);
1191 /* dentry may statahead when statahead is enabled and current process has opened
1192 * parent directory, and this dentry hasn't accessed statahead cache before */
1194 dentry_may_statahead(struct inode *dir, struct dentry *dentry)
1196 struct ll_inode_info *lli;
1197 struct ll_dentry_data *ldd;
1199 if (ll_i2sbi(dir)->ll_sa_max == 0)
1202 lli = ll_i2info(dir);
1204 /* statahead is not allowed for this dir, there may be three causes:
1205 * 1. dir is not opened.
1206 * 2. statahead hit ratio is too low.
1207 * 3. previous stat started statahead thread failed. */
1208 if (!lli->lli_sa_enabled)
1211 /* not the same process, don't statahead */
1212 if (lli->lli_opendir_pid != current_pid())
1216 * When stating a dentry, kernel may trigger 'revalidate' or 'lookup'
1217 * multiple times, eg. for 'getattr', 'getxattr' and etc.
1218 * For patchless client, lookup intent is not accurate, which may
1219 * misguide statahead. For example:
1220 * The 'revalidate' call for 'getattr' and 'getxattr' of a dentry will
1221 * have the same intent -- IT_GETATTR, while one dentry should access
1222 * statahead cache once, otherwise statahead windows is messed up.
1223 * The solution is as following:
1224 * Assign 'lld_sa_generation' with 'lli_sa_generation' when a dentry
1225 * IT_GETATTR for the first time, and subsequent IT_GETATTR will
1226 * bypass interacting with statahead cache by checking
1227 * 'lld_sa_generation == lli->lli_sa_generation'.
1229 ldd = ll_d2d(dentry);
1230 if (ldd != NULL && ldd->lld_sa_generation == lli->lli_sa_generation)
1236 /* llite ioctl register support rountine */
1242 #define LLIOC_MAX_CMD 256
1245 * Rules to write a callback function:
1248 * @magic: Dynamic ioctl call routine will feed this vaule with the pointer
1249 * returned to ll_iocontrol_register. Callback functions should use this
1250 * data to check the potential collasion of ioctl cmd. If collasion is
1251 * found, callback function should return LLIOC_CONT.
1252 * @rcp: The result of ioctl command.
1255 * If @magic matches the pointer returned by ll_iocontrol_data, the
1256 * callback should return LLIOC_STOP; return LLIOC_STOP otherwise.
1258 typedef enum llioc_iter (*llioc_callback_t)(struct inode *inode,
1259 struct file *file, unsigned int cmd, unsigned long arg,
1260 void *magic, int *rcp);
1262 /* export functions */
1263 /* Register ioctl block dynamatically for a regular file.
1265 * @cmd: the array of ioctl command set
1266 * @count: number of commands in the @cmd
1267 * @cb: callback function, it will be called if an ioctl command is found to
1268 * belong to the command list @cmd.
1271 * A magic pointer will be returned if success;
1272 * otherwise, NULL will be returned.
1274 void *ll_iocontrol_register(llioc_callback_t cb, int count, unsigned int *cmd);
1275 void ll_iocontrol_unregister(void *magic);
1277 int cl_sync_file_range(struct inode *inode, loff_t start, loff_t end,
1278 enum cl_fsync_mode mode, int ignore_layout);
1280 /** direct write pages */
1281 struct ll_dio_pages {
1282 /** page array to be written. we don't support
1283 * partial pages except the last one. */
1284 struct page **ldp_pages;
1285 /* offset of each page */
1286 loff_t *ldp_offsets;
1287 /** if ldp_offsets is NULL, it means a sequential
1288 * pages to be written, then this is the file offset
1289 * of the * first page. */
1290 loff_t ldp_start_offset;
1291 /** how many bytes are to be written. */
1293 /** # of pages in the array. */
1297 extern ssize_t ll_direct_rw_pages(const struct lu_env *env, struct cl_io *io,
1298 int rw, struct inode *inode,
1299 struct ll_dio_pages *pv);
1301 static inline int ll_file_nolock(const struct file *file)
1303 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
1304 struct inode *inode = file_inode((struct file *)file);
1306 LASSERT(fd != NULL);
1307 return ((fd->fd_flags & LL_FILE_IGNORE_LOCK) ||
1308 (ll_i2sbi(inode)->ll_flags & LL_SBI_NOLCK));
1311 static inline void ll_set_lock_data(struct obd_export *exp, struct inode *inode,
1312 struct lookup_intent *it, __u64 *bits)
1314 if (!it->it_lock_set) {
1315 struct lustre_handle handle;
1317 /* If this inode is a remote object, it will get two
1318 * separate locks in different namespaces, Master MDT,
1319 * where the name entry is, will grant LOOKUP lock,
1320 * remote MDT, where the object is, will grant
1321 * UPDATE|PERM lock. The inode will be attched to both
1322 * LOOKUP and PERM locks, so revoking either locks will
1323 * case the dcache being cleared */
1324 if (it->it_remote_lock_mode) {
1325 handle.cookie = it->it_remote_lock_handle;
1326 CDEBUG(D_DLMTRACE, "setting l_data to inode "DFID
1327 "(%p) for remote lock "LPX64"\n",
1328 PFID(ll_inode2fid(inode)), inode,
1330 md_set_lock_data(exp, &handle, inode, NULL);
1333 handle.cookie = it->it_lock_handle;
1335 CDEBUG(D_DLMTRACE, "setting l_data to inode "DFID"(%p)"
1336 " for lock "LPX64"\n",
1337 PFID(ll_inode2fid(inode)), inode, handle.cookie);
1339 md_set_lock_data(exp, &handle, inode, &it->it_lock_bits);
1340 it->it_lock_set = 1;
1344 *bits = it->it_lock_bits;
1347 static inline void ll_lock_dcache(struct inode *inode)
1349 #ifdef HAVE_DCACHE_LOCK
1350 spin_lock(&dcache_lock);
1352 spin_lock(&inode->i_lock);
1356 static inline void ll_unlock_dcache(struct inode *inode)
1358 #ifdef HAVE_DCACHE_LOCK
1359 spin_unlock(&dcache_lock);
1361 spin_unlock(&inode->i_lock);
1365 static inline int d_lustre_invalid(const struct dentry *dentry)
1367 struct ll_dentry_data *lld = ll_d2d(dentry);
1369 return (lld == NULL) || lld->lld_invalid;
1372 static inline void __d_lustre_invalidate(struct dentry *dentry)
1374 struct ll_dentry_data *lld = ll_d2d(dentry);
1377 lld->lld_invalid = 1;
1381 * Mark dentry INVALID, if dentry refcount is zero (this is normally case for
1382 * ll_md_blocking_ast), unhash this dentry, and let dcache to reclaim it later;
1383 * else dput() of the last refcount will unhash this dentry and kill it.
1385 static inline void d_lustre_invalidate(struct dentry *dentry, int nested)
1387 CDEBUG(D_DENTRY, "invalidate dentry %.*s (%p) parent %p inode %p "
1388 "refc %d\n", dentry->d_name.len, dentry->d_name.name, dentry,
1389 dentry->d_parent, dentry->d_inode, ll_d_count(dentry));
1391 spin_lock_nested(&dentry->d_lock,
1392 nested ? DENTRY_D_LOCK_NESTED : DENTRY_D_LOCK_NORMAL);
1393 __d_lustre_invalidate(dentry);
1395 * We should be careful about dentries created by d_obtain_alias().
1396 * These dentries are not put in the dentry tree, instead they are
1397 * linked to sb->s_anon through dentry->d_hash.
1398 * shrink_dcache_for_umount() shrinks the tree and sb->s_anon list.
1399 * If we unhashed such a dentry, unmount would not be able to find
1400 * it and busy inodes would be reported.
1402 if (ll_d_count(dentry) == 0 && !(dentry->d_flags & DCACHE_DISCONNECTED))
1404 spin_unlock(&dentry->d_lock);
1407 static inline void d_lustre_revalidate(struct dentry *dentry)
1409 spin_lock(&dentry->d_lock);
1410 LASSERT(ll_d2d(dentry) != NULL);
1411 ll_d2d(dentry)->lld_invalid = 0;
1412 spin_unlock(&dentry->d_lock);
1415 int ll_layout_conf(struct inode *inode, const struct cl_object_conf *conf);
1416 int ll_layout_refresh(struct inode *inode, __u32 *gen);
1417 int ll_layout_restore(struct inode *inode, loff_t start, __u64 length);
1419 int ll_xattr_init(void);
1420 void ll_xattr_fini(void);
1422 int ll_getxattr_common(struct inode *inode, const char *name,
1423 void *buffer, size_t size, __u64 valid);
1424 int ll_page_sync_io(const struct lu_env *env, struct cl_io *io,
1425 struct cl_page *page, enum cl_req_type crt);
1427 int ll_getparent(struct file *file, struct getparent __user *arg);
1430 int cl_setattr_ost(struct cl_object *obj, const struct iattr *attr,
1431 unsigned int attr_flags);
1433 extern struct lu_env *cl_inode_fini_env;
1434 extern __u16 cl_inode_fini_refcheck;
1436 int cl_file_inode_init(struct inode *inode, struct lustre_md *md);
1437 void cl_inode_fini(struct inode *inode);
1439 u64 cl_fid_build_ino(const struct lu_fid *fid, int api32);
1440 u32 cl_fid_build_gen(const struct lu_fid *fid);
1442 #ifndef HAVE_IOV_ITER_TRUNCATE
1443 static inline void iov_iter_truncate(struct iov_iter *i, u64 count)
1445 if (i->count > count)
1450 #ifndef HAVE_FILE_OPERATIONS_READ_WRITE_ITER
1451 static inline void iov_iter_reexpand(struct iov_iter *i, size_t count)
1456 static inline struct iovec iov_iter_iovec(const struct iov_iter *iter)
1458 return (struct iovec) {
1459 .iov_base = iter->iov->iov_base + iter->iov_offset,
1460 .iov_len = min(iter->count,
1461 iter->iov->iov_len - iter->iov_offset),
1465 #define iov_for_each(iov, iter, start) \
1466 for (iter = (start); \
1467 (iter).count && ((iov = iov_iter_iovec(&(iter))), 1); \
1468 iov_iter_advance(&(iter), (iov).iov_len))
1470 static inline ssize_t
1471 generic_file_read_iter(struct kiocb *iocb, struct iov_iter *iter)
1477 iov_for_each(iov, i, *iter) {
1480 res = generic_file_aio_read(iocb, &iov, 1, iocb->ki_pos);
1488 if (res < iov.iov_len)
1493 iov_iter_advance(iter, bytes);
1497 static inline ssize_t
1498 generic_file_write_iter(struct kiocb *iocb, struct iov_iter *iter)
1504 iov_for_each(iov, i, *iter) {
1507 res = __generic_file_aio_write(iocb, &iov, 1, &iocb->ki_pos);
1515 if (res < iov.iov_len)
1520 iov_iter_advance(iter, bytes);
1523 #endif /* HAVE_FILE_OPERATIONS_READ_WRITE_ITER */
1524 #endif /* LLITE_INTERNAL_H */