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, 2015, 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_ver.h>
37 #include <lustre_disk.h> /* for s2sbi */
38 #include <lustre_eacl.h>
39 #include <lustre_linkea.h>
41 /* for struct cl_lock_descr and struct cl_io */
42 #include <cl_object.h>
43 #include <lustre_lmv.h>
44 #include <lustre_mdc.h>
45 #include <lustre_intent.h>
46 #include <linux/compat.h>
47 #include <linux/aio.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 /* Try to make the d::member and f::member are aligned. Before using
137 * these members, make clear whether it is directory or not. */
141 /* serialize normal readdir and statahead-readdir. */
142 struct mutex lli_readdir_mutex;
144 /* metadata statahead */
145 /* since parent-child threads can share the same @file
146 * struct, "opendir_key" is the token when dir close for
147 * case of parent exit before child -- it is me should
148 * cleanup the dir readahead. */
149 void *lli_opendir_key;
150 struct ll_statahead_info *lli_sai;
151 /* protect statahead stuff. */
152 spinlock_t lli_sa_lock;
153 /* "opendir_pid" is the token when lookup/revalid
154 * -- I am the owner of dir statahead. */
155 pid_t lli_opendir_pid;
156 /* stat will try to access statahead entries or start
157 * statahead if this flag is set, and this flag will be
158 * set upon dir open, and cleared when dir is closed,
159 * statahead hit ratio is too low, or start statahead
161 unsigned int lli_sa_enabled:1;
162 /* generation for statahead */
163 unsigned int lli_sa_generation;
164 /* directory stripe information */
165 struct lmv_stripe_md *lli_lsm_md;
166 /* default directory stripe offset. This is extracted
167 * from the "dmv" xattr in order to decide which MDT to
168 * create a subdirectory on. The MDS itself fetches
169 * "dmv" and gets the rest of the default layout itself
170 * (count, hash, etc). */
171 __u32 lli_def_stripe_offset;
174 /* for non-directory */
176 struct mutex lli_size_mutex;
177 char *lli_symlink_name;
179 * struct rw_semaphore {
180 * signed long count; // align d.d_def_acl
181 * spinlock_t wait_lock; // align d.d_sa_lock
182 * struct list_head wait_list;
185 struct rw_semaphore lli_trunc_sem;
186 struct range_lock_tree lli_write_tree;
188 struct rw_semaphore lli_glimpse_sem;
189 cfs_time_t lli_glimpse_time;
190 struct list_head lli_agl_list;
193 /* for writepage() only to communicate to fsync */
197 * whenever a process try to read/write the file, the
198 * jobid of the process will be saved here, and it'll
199 * be packed into the write PRC when flush later.
201 * so the read/write statistics for jobid will not be
202 * accurate if the file is shared by different jobs.
204 char lli_jobid[LUSTRE_JOBID_SIZE];
208 /* XXX: For following frequent used members, although they maybe special
209 * used for non-directory object, it is some time-wasting to check
210 * whether the object is directory or not before using them. On the
211 * other hand, currently, sizeof(f) > sizeof(d), it cannot reduce
212 * the "ll_inode_info" size even if moving those members into u.f.
213 * So keep them out side.
215 * In the future, if more members are added only for directory,
216 * some of the following members can be moved into u.f.
218 struct cl_object *lli_clob;
220 /* mutex to request for layout lock exclusively. */
221 struct mutex lli_layout_mutex;
222 /* Layout version, protected by lli_layout_lock */
223 __u32 lli_layout_gen;
224 spinlock_t lli_layout_lock;
226 struct rw_semaphore lli_xattrs_list_rwsem;
227 struct mutex lli_xattrs_enq_lock;
228 struct list_head lli_xattrs; /* ll_xattr_entry->xe_list */
231 static inline __u32 ll_layout_version_get(struct ll_inode_info *lli)
235 spin_lock(&lli->lli_layout_lock);
236 gen = lli->lli_layout_gen;
237 spin_unlock(&lli->lli_layout_lock);
242 static inline void ll_layout_version_set(struct ll_inode_info *lli, __u32 gen)
244 spin_lock(&lli->lli_layout_lock);
245 lli->lli_layout_gen = gen;
246 spin_unlock(&lli->lli_layout_lock);
250 /* File data is modified. */
251 LLIF_DATA_MODIFIED = 0,
252 /* File is being restored */
253 LLIF_FILE_RESTORING = 1,
254 /* Xattr cache is attached to the file */
255 LLIF_XATTR_CACHE = 2,
258 static inline void ll_file_set_flag(struct ll_inode_info *lli,
259 enum ll_file_flags flag)
261 set_bit(flag, &lli->lli_flags);
264 static inline void ll_file_clear_flag(struct ll_inode_info *lli,
265 enum ll_file_flags flag)
267 clear_bit(flag, &lli->lli_flags);
270 static inline bool ll_file_test_flag(struct ll_inode_info *lli,
271 enum ll_file_flags flag)
273 return test_bit(flag, &lli->lli_flags);
276 static inline bool ll_file_test_and_clear_flag(struct ll_inode_info *lli,
277 enum ll_file_flags flag)
279 return test_and_clear_bit(flag, &lli->lli_flags);
282 int ll_xattr_cache_destroy(struct inode *inode);
284 int ll_xattr_cache_get(struct inode *inode,
290 int ll_dentry_init_security(struct dentry *dentry, int mode, struct qstr *name,
291 const char **secctx_name, void **secctx,
293 int ll_inode_init_security(struct dentry *dentry, struct inode *inode,
297 * Locking to guarantee consistency of non-atomic updates to long long i_size,
298 * consistency between file size and KMS.
300 * Implemented by ->lli_size_mutex and ->lsm_lock, nested in that order.
303 void ll_inode_size_lock(struct inode *inode);
304 void ll_inode_size_unlock(struct inode *inode);
306 // FIXME: replace the name of this with LL_I to conform to kernel stuff
307 // static inline struct ll_inode_info *LL_I(struct inode *inode)
308 static inline struct ll_inode_info *ll_i2info(struct inode *inode)
310 return container_of(inode, struct ll_inode_info, lli_vfs_inode);
313 /* default to about 64M of readahead on a given system. */
314 #define SBI_DEFAULT_READAHEAD_MAX (64UL << (20 - PAGE_SHIFT))
316 /* default to read-ahead full files smaller than 2MB on the second read */
317 #define SBI_DEFAULT_READAHEAD_WHOLE_MAX (2UL << (20 - PAGE_SHIFT))
322 RA_STAT_DISTANT_READPAGE,
323 RA_STAT_MISS_IN_WINDOW,
324 RA_STAT_FAILED_GRAB_PAGE,
325 RA_STAT_FAILED_MATCH,
330 RA_STAT_MAX_IN_FLIGHT,
331 RA_STAT_WRONG_GRAB_PAGE,
332 RA_STAT_FAILED_REACH_END,
337 atomic_t ra_cur_pages;
338 unsigned long ra_max_pages;
339 unsigned long ra_max_pages_per_file;
340 unsigned long ra_max_read_ahead_whole_pages;
343 /* ra_io_arg will be filled in the beginning of ll_readahead with
344 * ras_lock, then the following ll_read_ahead_pages will read RA
345 * pages according to this arg, all the items in this structure are
346 * counted by page index.
349 unsigned long ria_start; /* start offset of read-ahead*/
350 unsigned long ria_end; /* end offset of read-ahead*/
351 unsigned long ria_reserved; /* reserved pages for read-ahead */
352 unsigned long ria_end_min; /* minimum end to cover current read */
353 bool ria_eof; /* reach end of file */
354 /* If stride read pattern is detected, ria_stoff means where
355 * stride read is started. Note: for normal read-ahead, the
356 * value here is meaningless, and also it will not be accessed*/
358 /* ria_length and ria_pages are the length and pages length in the
359 * stride I/O mode. And they will also be used to check whether
360 * it is stride I/O read-ahead in the read-ahead pages*/
361 unsigned long ria_length;
362 unsigned long ria_pages;
365 /* LL_HIST_MAX=32 causes an overflow */
366 #define LL_HIST_MAX 28
367 #define LL_HIST_START 12 /* buckets start at 2^12 = 4k */
368 #define LL_PROCESS_HIST_MAX 10
369 struct per_process_info {
371 struct obd_histogram pp_r_hist;
372 struct obd_histogram pp_w_hist;
375 /* pp_extents[LL_PROCESS_HIST_MAX] will hold the combined process info */
376 struct ll_rw_extents_info {
377 struct per_process_info pp_extents[LL_PROCESS_HIST_MAX + 1];
380 #define LL_OFFSET_HIST_MAX 100
381 struct ll_rw_process_info {
384 loff_t rw_range_start;
386 loff_t rw_last_file_pos;
388 size_t rw_smallest_extent;
389 size_t rw_largest_extent;
390 struct ll_file_data *rw_last_file;
393 enum stats_track_type {
394 STATS_TRACK_ALL = 0, /* track all processes */
395 STATS_TRACK_PID, /* track process with this pid */
396 STATS_TRACK_PPID, /* track processes with this ppid */
397 STATS_TRACK_GID, /* track processes with this gid */
401 /* flags for sbi->ll_flags */
402 #define LL_SBI_NOLCK 0x01 /* DLM locking disabled (directio-only) */
403 #define LL_SBI_CHECKSUM 0x02 /* checksum each page as it's written */
404 #define LL_SBI_FLOCK 0x04
405 #define LL_SBI_USER_XATTR 0x08 /* support user xattr */
406 #define LL_SBI_ACL 0x10 /* support ACL */
407 /* LL_SBI_RMT_CLIENT 0x40 remote client */
408 #define LL_SBI_MDS_CAPA 0x80 /* support mds capa, obsolete */
409 #define LL_SBI_OSS_CAPA 0x100 /* support oss capa, obsolete */
410 #define LL_SBI_LOCALFLOCK 0x200 /* Local flocks support by kernel */
411 #define LL_SBI_LRU_RESIZE 0x400 /* lru resize support */
412 #define LL_SBI_LAZYSTATFS 0x800 /* lazystatfs mount option */
413 /* LL_SBI_SOM_PREVIEW 0x1000 SOM preview mount option, obsolete */
414 #define LL_SBI_32BIT_API 0x2000 /* generate 32 bit inodes. */
415 #define LL_SBI_64BIT_HASH 0x4000 /* support 64-bits dir hash/offset */
416 #define LL_SBI_AGL_ENABLED 0x8000 /* enable agl */
417 #define LL_SBI_VERBOSE 0x10000 /* verbose mount/umount */
418 #define LL_SBI_LAYOUT_LOCK 0x20000 /* layout lock support */
419 #define LL_SBI_USER_FID2PATH 0x40000 /* allow fid2path by unprivileged users */
420 #define LL_SBI_XATTR_CACHE 0x80000 /* support for xattr cache */
421 #define LL_SBI_NOROOTSQUASH 0x100000 /* do not apply root squash */
422 #define LL_SBI_ALWAYS_PING 0x200000 /* always ping even if server
424 #define LL_SBI_FAST_READ 0x400000 /* fast read support */
425 #define LL_SBI_FILE_SECCTX 0x800000 /* set file security context at create */
427 #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;
533 * per file-descriptor read-ahead data.
535 struct ll_readahead_state {
538 * index of the last page that read(2) needed and that wasn't in the
539 * cache. Used by ras_update() to detect seeks.
541 * XXX nikita: if access seeks into cached region, Lustre doesn't see
544 unsigned long ras_last_readpage;
546 * number of pages read after last read-ahead window reset. As window
547 * is reset on each seek, this is effectively a number of consecutive
548 * accesses. Maybe ->ras_accessed_in_window is better name.
550 * XXX nikita: window is also reset (by ras_update()) when Lustre
551 * believes that memory pressure evicts read-ahead pages. In that
552 * case, it probably doesn't make sense to expand window to
553 * PTLRPC_MAX_BRW_PAGES on the third access.
555 unsigned long ras_consecutive_pages;
557 * number of read requests after the last read-ahead window reset
558 * As window is reset on each seek, this is effectively the number
559 * on consecutive read request and is used to trigger read-ahead.
561 unsigned long ras_consecutive_requests;
563 * Parameters of current read-ahead window. Handled by
564 * ras_update(). On the initial access to the file or after a seek,
565 * window is reset to 0. After 3 consecutive accesses, window is
566 * expanded to PTLRPC_MAX_BRW_PAGES. Afterwards, window is enlarged by
567 * PTLRPC_MAX_BRW_PAGES chunks up to ->ra_max_pages.
569 unsigned long ras_window_start, ras_window_len;
571 * Optimal RPC size. It decides how many pages will be sent
572 * for each read-ahead.
574 unsigned long ras_rpc_size;
576 * Where next read-ahead should start at. This lies within read-ahead
577 * window. Read-ahead window is read in pieces rather than at once
578 * because: 1. lustre limits total number of pages under read-ahead by
579 * ->ra_max_pages (see ll_ra_count_get()), 2. client cannot read pages
580 * not covered by DLM lock.
582 unsigned long ras_next_readahead;
584 * Total number of ll_file_read requests issued, reads originating
585 * due to mmap are not counted in this total. This value is used to
586 * trigger full file read-ahead after multiple reads to a small file.
588 unsigned long ras_requests;
590 * Page index with respect to the current request, these value
591 * will not be accurate when dealing with reads issued via mmap.
593 unsigned long ras_request_index;
595 * The following 3 items are used for detecting the stride I/O
597 * In stride I/O mode,
598 * ...............|-----data-----|****gap*****|--------|******|....
599 * offset |-stride_pages-|-stride_gap-|
600 * ras_stride_offset = offset;
601 * ras_stride_length = stride_pages + stride_gap;
602 * ras_stride_pages = stride_pages;
603 * Note: all these three items are counted by pages.
605 unsigned long ras_stride_length;
606 unsigned long ras_stride_pages;
607 pgoff_t ras_stride_offset;
609 * number of consecutive stride request count, and it is similar as
610 * ras_consecutive_requests, but used for stride I/O mode.
611 * Note: only more than 2 consecutive stride request are detected,
612 * stride read-ahead will be enable
614 unsigned long ras_consecutive_stride_requests;
617 extern struct kmem_cache *ll_file_data_slab;
618 struct lustre_handle;
619 struct ll_file_data {
620 struct ll_readahead_state fd_ras;
621 struct ll_grouplock fd_grouplock;
625 /* openhandle if lease exists for this file.
626 * Borrow lli->lli_och_mutex to protect assignment */
627 struct obd_client_handle *fd_lease_och;
628 struct obd_client_handle *fd_och;
629 struct file *fd_file;
630 /* Indicate whether need to report failure when close.
631 * true: failure is known, not report again.
632 * false: unknown failure, should report. */
633 bool fd_write_failed;
634 rwlock_t fd_lock; /* protect lcc list */
635 struct list_head fd_lccs; /* list of ll_cl_context */
638 extern struct proc_dir_entry *proc_lustre_fs_root;
640 static inline struct inode *ll_info2i(struct ll_inode_info *lli)
642 return &lli->lli_vfs_inode;
645 __u32 ll_i2suppgid(struct inode *i);
646 void ll_i2gids(__u32 *suppgids, struct inode *i1,struct inode *i2);
648 static inline int ll_need_32bit_api(struct ll_sb_info *sbi)
650 #if BITS_PER_LONG == 32
652 #elif defined(CONFIG_COMPAT)
653 return unlikely(in_compat_syscall() || (sbi->ll_flags & LL_SBI_32BIT_API));
655 return unlikely(sbi->ll_flags & LL_SBI_32BIT_API);
659 static inline bool ll_sbi_has_fast_read(struct ll_sb_info *sbi)
661 return !!(sbi->ll_flags & LL_SBI_FAST_READ);
664 void ll_ras_enter(struct file *f);
666 /* llite/lcommon_misc.c */
667 int cl_ocd_update(struct obd_device *host, struct obd_device *watched,
668 enum obd_notify_event ev, void *owner, void *data);
669 int cl_get_grouplock(struct cl_object *obj, unsigned long gid, int nonblock,
670 struct ll_grouplock *lg);
671 void cl_put_grouplock(struct ll_grouplock *lg);
673 /* llite/lproc_llite.c */
674 #ifdef CONFIG_PROC_FS
675 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
676 struct super_block *sb, char *osc, char *mdc);
677 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi);
678 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count);
679 extern struct lprocfs_vars lprocfs_llite_obd_vars[];
681 static inline int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
682 struct super_block *sb, char *osc, char *mdc){return 0;}
683 static inline void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi) {}
684 static void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count) {}
689 LPROC_LL_DIRTY_MISSES,
691 LPROC_LL_WRITE_BYTES,
716 LPROC_LL_ALLOC_INODE,
719 LPROC_LL_GETXATTR_HITS,
721 LPROC_LL_REMOVEXATTR,
723 LPROC_LL_FILE_OPCODES
727 struct ll_dir_chain {
730 static inline void ll_dir_chain_init(struct ll_dir_chain *chain)
734 static inline void ll_dir_chain_fini(struct ll_dir_chain *chain)
738 extern const struct file_operations ll_dir_operations;
739 extern const struct inode_operations ll_dir_inode_operations;
740 #ifdef HAVE_DIR_CONTEXT
741 int ll_dir_read(struct inode *inode, __u64 *pos, struct md_op_data *op_data,
742 struct dir_context *ctx);
744 int ll_dir_read(struct inode *inode, __u64 *pos, struct md_op_data *op_data,
745 void *cookie, filldir_t filldir);
747 int ll_get_mdt_idx(struct inode *inode);
748 int ll_get_mdt_idx_by_fid(struct ll_sb_info *sbi, const struct lu_fid *fid);
749 struct page *ll_get_dir_page(struct inode *dir, struct md_op_data *op_data,
750 __u64 offset, struct ll_dir_chain *chain);
751 void ll_release_page(struct inode *inode, struct page *page, bool remove);
754 extern const struct inode_operations ll_special_inode_operations;
756 struct inode *ll_iget(struct super_block *sb, ino_t hash,
757 struct lustre_md *lic);
758 int ll_test_inode_by_fid(struct inode *inode, void *opaque);
759 int ll_md_blocking_ast(struct ldlm_lock *, struct ldlm_lock_desc *,
760 void *data, int flag);
761 struct dentry *ll_splice_alias(struct inode *inode, struct dentry *de);
762 int ll_rmdir_entry(struct inode *dir, char *name, int namelen);
763 void ll_update_times(struct ptlrpc_request *request, struct inode *inode);
766 int ll_writepage(struct page *page, struct writeback_control *wbc);
767 int ll_writepages(struct address_space *, struct writeback_control *wbc);
768 int ll_readpage(struct file *file, struct page *page);
769 void ll_readahead_init(struct inode *inode, struct ll_readahead_state *ras);
770 int vvp_io_write_commit(const struct lu_env *env, struct cl_io *io);
773 void ll_cl_add(struct file *file, const struct lu_env *env, struct cl_io *io,
775 void ll_cl_remove(struct file *file, const struct lu_env *env);
776 struct ll_cl_context *ll_cl_find(struct file *file);
778 extern const struct address_space_operations ll_aops;
781 extern struct file_operations ll_file_operations;
782 extern struct file_operations ll_file_operations_flock;
783 extern struct file_operations ll_file_operations_noflock;
784 extern struct inode_operations ll_file_inode_operations;
785 extern int ll_have_md_lock(struct inode *inode, __u64 *bits,
786 enum ldlm_mode l_req_mode);
787 extern enum ldlm_mode ll_take_md_lock(struct inode *inode, __u64 bits,
788 struct lustre_handle *lockh, __u64 flags,
789 enum ldlm_mode mode);
791 int ll_file_open(struct inode *inode, struct file *file);
792 int ll_file_release(struct inode *inode, struct file *file);
793 int ll_release_openhandle(struct dentry *, struct lookup_intent *);
794 int ll_md_real_close(struct inode *inode, fmode_t fmode);
795 extern void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
796 struct ll_file_data *file, loff_t pos,
797 size_t count, int rw);
798 int ll_getattr(struct vfsmount *mnt, struct dentry *de, struct kstat *stat);
799 struct posix_acl *ll_get_acl(struct inode *inode, int type);
800 int ll_migrate(struct inode *parent, struct file *file, int mdtidx,
801 const char *name, int namelen);
802 int ll_get_fid_by_name(struct inode *parent, const char *name,
803 int namelen, struct lu_fid *fid, struct inode **inode);
804 #ifdef HAVE_GENERIC_PERMISSION_4ARGS
805 int ll_inode_permission(struct inode *inode, int mask, unsigned int flags);
807 # ifndef HAVE_INODE_PERMISION_2ARGS
808 int ll_inode_permission(struct inode *inode, int mask, struct nameidata *nd);
810 int ll_inode_permission(struct inode *inode, int mask);
814 int ll_lov_setstripe_ea_info(struct inode *inode, struct file *file,
815 __u64 flags, struct lov_user_md *lum,
817 int ll_lov_getstripe_ea_info(struct inode *inode, const char *filename,
818 struct lov_mds_md **lmm, int *lmm_size,
819 struct ptlrpc_request **request);
820 int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump,
822 int ll_dir_getstripe(struct inode *inode, void **lmmp,
823 int *lmm_size, struct ptlrpc_request **request,
825 #ifdef HAVE_FILE_FSYNC_4ARGS
826 int ll_fsync(struct file *file, loff_t start, loff_t end, int data);
827 #elif defined(HAVE_FILE_FSYNC_2ARGS)
828 int ll_fsync(struct file *file, int data);
830 int ll_fsync(struct file *file, struct dentry *dentry, int data);
832 int ll_merge_attr(const struct lu_env *env, struct inode *inode);
833 int ll_fid2path(struct inode *inode, void __user *arg);
834 int ll_data_version(struct inode *inode, __u64 *data_version, int flags);
835 int ll_hsm_release(struct inode *inode);
836 int ll_hsm_state_set(struct inode *inode, struct hsm_state_set *hss);
840 int ll_d_init(struct dentry *de);
841 extern const struct dentry_operations ll_d_ops;
842 void ll_intent_drop_lock(struct lookup_intent *);
843 void ll_intent_release(struct lookup_intent *);
844 void ll_invalidate_aliases(struct inode *);
845 void ll_lookup_finish_locks(struct lookup_intent *it, struct dentry *dentry);
846 int ll_revalidate_it_finish(struct ptlrpc_request *request,
847 struct lookup_intent *it, struct dentry *de);
849 /* llite/llite_lib.c */
850 extern struct super_operations lustre_super_operations;
852 void ll_lli_init(struct ll_inode_info *lli);
853 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt);
854 void ll_put_super(struct super_block *sb);
855 void ll_kill_super(struct super_block *sb);
856 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock);
857 void ll_dir_clear_lsm_md(struct inode *inode);
858 void ll_clear_inode(struct inode *inode);
859 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr, bool hsm_import);
860 int ll_setattr(struct dentry *de, struct iattr *attr);
861 int ll_statfs(struct dentry *de, struct kstatfs *sfs);
862 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
863 __u64 max_age, __u32 flags);
864 int ll_update_inode(struct inode *inode, struct lustre_md *md);
865 int ll_read_inode2(struct inode *inode, void *opaque);
866 void ll_delete_inode(struct inode *inode);
867 int ll_iocontrol(struct inode *inode, struct file *file,
868 unsigned int cmd, unsigned long arg);
869 int ll_flush_ctx(struct inode *inode);
870 void ll_umount_begin(struct super_block *sb);
871 int ll_remount_fs(struct super_block *sb, int *flags, char *data);
872 #ifdef HAVE_SUPEROPS_USE_DENTRY
873 int ll_show_options(struct seq_file *seq, struct dentry *dentry);
875 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs);
877 void ll_dirty_page_discard_warn(struct page *page, int ioret);
878 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
879 struct super_block *, struct lookup_intent *);
880 void lustre_dump_dentry(struct dentry *, int recur);
881 int ll_obd_statfs(struct inode *inode, void __user *arg);
882 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *max_mdsize);
883 int ll_get_default_mdsize(struct ll_sb_info *sbi, int *default_mdsize);
884 int ll_set_default_mdsize(struct ll_sb_info *sbi, int default_mdsize);
885 int ll_process_config(struct lustre_cfg *lcfg);
888 LUSTRE_OPC_MKDIR = 0,
889 LUSTRE_OPC_SYMLINK = 1,
890 LUSTRE_OPC_MKNOD = 2,
891 LUSTRE_OPC_CREATE = 3,
895 struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
896 struct inode *i1, struct inode *i2,
897 const char *name, size_t namelen,
898 __u32 mode, __u32 opc, void *data);
899 void ll_finish_md_op_data(struct md_op_data *op_data);
900 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg);
901 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen);
902 void ll_compute_rootsquash_state(struct ll_sb_info *sbi);
903 ssize_t ll_copy_user_md(const struct lov_user_md __user *md,
904 struct lov_user_md **kbuf);
905 void ll_open_cleanup(struct super_block *sb, struct ptlrpc_request *open_req);
907 /* Compute expected user md size when passing in a md from user space */
908 static inline ssize_t ll_lov_user_md_size(const struct lov_user_md *lum)
910 switch (lum->lmm_magic) {
911 case LOV_USER_MAGIC_V1:
912 return sizeof(struct lov_user_md_v1);
913 case LOV_USER_MAGIC_V3:
914 return sizeof(struct lov_user_md_v3);
915 case LOV_USER_MAGIC_SPECIFIC:
916 if (lum->lmm_stripe_count > LOV_MAX_STRIPE_COUNT)
919 return lov_user_md_size(lum->lmm_stripe_count,
920 LOV_USER_MAGIC_SPECIFIC);
926 /* llite/llite_nfs.c */
927 extern struct export_operations lustre_export_operations;
928 __u32 get_uuid2int(const char *name, int len);
929 struct inode *search_inode_for_lustre(struct super_block *sb,
930 const struct lu_fid *fid);
931 int ll_dir_get_parent_fid(struct inode *dir, struct lu_fid *parent_fid);
933 /* llite/symlink.c */
934 extern struct inode_operations ll_fast_symlink_inode_operations;
937 * IO arguments for various VFS I/O interfaces.
940 /** normal/sendfile/splice */
941 enum vvp_io_subtype via_io_subtype;
945 struct kiocb *via_iocb;
946 struct iov_iter *via_iter;
949 struct pipe_inode_info *via_pipe;
950 unsigned int via_flags;
960 struct ll_cl_context {
961 struct list_head lcc_list;
963 const struct lu_env *lcc_env;
964 struct cl_io *lcc_io;
965 struct cl_page *lcc_page;
966 enum lcc_type lcc_type;
969 struct ll_thread_info {
970 struct iov_iter lti_iter;
971 struct vvp_io_args lti_args;
972 struct ra_io_arg lti_ria;
973 struct kiocb lti_kiocb;
974 struct ll_cl_context lti_io_ctx;
977 extern struct lu_context_key ll_thread_key;
979 static inline struct ll_thread_info *ll_env_info(const struct lu_env *env)
981 struct ll_thread_info *lti;
983 lti = lu_context_key_get(&env->le_ctx, &ll_thread_key);
984 LASSERT(lti != NULL);
989 static inline struct vvp_io_args *ll_env_args(const struct lu_env *env,
990 enum vvp_io_subtype type)
992 struct vvp_io_args *via = &ll_env_info(env)->lti_args;
994 via->via_io_subtype = type;
999 /* llite/llite_mmap.c */
1001 int ll_teardown_mmaps(struct address_space *mapping, __u64 first, __u64 last);
1002 int ll_file_mmap(struct file * file, struct vm_area_struct * vma);
1003 void policy_from_vma(union ldlm_policy_data *policy, struct vm_area_struct *vma,
1004 unsigned long addr, size_t count);
1005 struct vm_area_struct *our_vma(struct mm_struct *mm, unsigned long addr,
1008 static inline void ll_invalidate_page(struct page *vmpage)
1010 struct address_space *mapping = vmpage->mapping;
1011 loff_t offset = vmpage->index << PAGE_SHIFT;
1013 LASSERT(PageLocked(vmpage));
1014 if (mapping == NULL)
1018 * truncate_complete_page() calls
1019 * a_ops->invalidatepage()->cl_page_delete()->vvp_page_delete().
1021 ll_teardown_mmaps(mapping, offset, offset + PAGE_SIZE);
1022 truncate_complete_page(mapping, vmpage);
1025 #define ll_s2sbi(sb) (s2lsi(sb)->lsi_llsbi)
1027 /* don't need an addref as the sb_info should be holding one */
1028 static inline struct obd_export *ll_s2dtexp(struct super_block *sb)
1030 return ll_s2sbi(sb)->ll_dt_exp;
1033 /* don't need an addref as the sb_info should be holding one */
1034 static inline struct obd_export *ll_s2mdexp(struct super_block *sb)
1036 return ll_s2sbi(sb)->ll_md_exp;
1039 static inline struct client_obd *sbi2mdc(struct ll_sb_info *sbi)
1041 struct obd_device *obd = sbi->ll_md_exp->exp_obd;
1047 // FIXME: replace the name of this with LL_SB to conform to kernel stuff
1048 static inline struct ll_sb_info *ll_i2sbi(struct inode *inode)
1050 return ll_s2sbi(inode->i_sb);
1053 static inline struct obd_export *ll_i2dtexp(struct inode *inode)
1055 return ll_s2dtexp(inode->i_sb);
1058 static inline struct obd_export *ll_i2mdexp(struct inode *inode)
1060 return ll_s2mdexp(inode->i_sb);
1063 static inline struct lu_fid *ll_inode2fid(struct inode *inode)
1067 LASSERT(inode != NULL);
1068 fid = &ll_i2info(inode)->lli_fid;
1073 static inline loff_t ll_file_maxbytes(struct inode *inode)
1075 struct cl_object *obj = ll_i2info(inode)->lli_clob;
1078 return MAX_LFS_FILESIZE;
1080 return min_t(loff_t, cl_object_maxbytes(obj), MAX_LFS_FILESIZE);
1084 int ll_setxattr(struct dentry *dentry, const char *name,
1085 const void *value, size_t size, int flags);
1086 ssize_t ll_getxattr(struct dentry *dentry, const char *name,
1087 void *buffer, size_t size);
1088 ssize_t ll_listxattr(struct dentry *dentry, char *buffer, size_t size);
1089 int ll_removexattr(struct dentry *dentry, const char *name);
1092 * Common IO arguments for various VFS I/O interfaces.
1094 int cl_sb_init(struct super_block *sb);
1095 int cl_sb_fini(struct super_block *sb);
1097 enum ras_update_flags {
1101 void ll_ra_count_put(struct ll_sb_info *sbi, unsigned long len);
1102 void ll_ra_stats_inc(struct inode *inode, enum ra_stat which);
1106 #define LL_SA_RPC_MIN 2
1107 #define LL_SA_RPC_DEF 32
1108 #define LL_SA_RPC_MAX 8192
1110 #define LL_SA_CACHE_BIT 5
1111 #define LL_SA_CACHE_SIZE (1 << LL_SA_CACHE_BIT)
1112 #define LL_SA_CACHE_MASK (LL_SA_CACHE_SIZE - 1)
1114 /* per inode struct, for dir only */
1115 struct ll_statahead_info {
1116 struct dentry *sai_dentry;
1117 atomic_t sai_refcount; /* when access this struct, hold
1119 unsigned int sai_max; /* max ahead of lookup */
1120 __u64 sai_sent; /* stat requests sent count */
1121 __u64 sai_replied; /* stat requests which received
1123 __u64 sai_index; /* index of statahead entry */
1124 __u64 sai_index_wait; /* index of entry which is the
1125 * caller is waiting for */
1126 __u64 sai_hit; /* hit count */
1127 __u64 sai_miss; /* miss count:
1128 * for "ls -al" case, includes
1129 * hidden dentry miss;
1130 * for "ls -l" case, it does not
1131 * include hidden dentry miss.
1132 * "sai_miss_hidden" is used for
1135 unsigned int sai_consecutive_miss; /* consecutive miss */
1136 unsigned int sai_miss_hidden;/* "ls -al", but first dentry
1137 * is not a hidden one */
1138 unsigned int sai_skip_hidden;/* skipped hidden dentry count
1140 unsigned int sai_ls_all:1, /* "ls -al", do stat-ahead for
1142 sai_agl_valid:1,/* AGL is valid for the dir */
1143 sai_in_readpage:1;/* statahead is in readdir()*/
1144 wait_queue_head_t sai_waitq; /* stat-ahead wait queue */
1145 struct ptlrpc_thread sai_thread; /* stat-ahead thread */
1146 struct ptlrpc_thread sai_agl_thread; /* AGL thread */
1147 struct list_head sai_interim_entries; /* entries which got async
1148 * stat reply, but not
1150 struct list_head sai_entries; /* completed entries */
1151 struct list_head sai_agls; /* AGLs to be sent */
1152 struct list_head sai_cache[LL_SA_CACHE_SIZE];
1153 spinlock_t sai_cache_lock[LL_SA_CACHE_SIZE];
1154 atomic_t sai_cache_count; /* entry count in cache */
1157 int ll_statahead(struct inode *dir, struct dentry **dentry, bool unplug);
1158 void ll_authorize_statahead(struct inode *dir, void *key);
1159 void ll_deauthorize_statahead(struct inode *dir, void *key);
1162 blkcnt_t dirty_cnt(struct inode *inode);
1164 int cl_glimpse_size0(struct inode *inode, int agl);
1165 int cl_glimpse_lock(const struct lu_env *env, struct cl_io *io,
1166 struct inode *inode, struct cl_object *clob, int agl);
1168 static inline int cl_glimpse_size(struct inode *inode)
1170 return cl_glimpse_size0(inode, 0);
1173 static inline int cl_agl(struct inode *inode)
1175 return cl_glimpse_size0(inode, 1);
1178 static inline int ll_glimpse_size(struct inode *inode)
1180 struct ll_inode_info *lli = ll_i2info(inode);
1183 down_read(&lli->lli_glimpse_sem);
1184 rc = cl_glimpse_size(inode);
1185 lli->lli_glimpse_time = cfs_time_current();
1186 up_read(&lli->lli_glimpse_sem);
1190 /* dentry may statahead when statahead is enabled and current process has opened
1191 * parent directory, and this dentry hasn't accessed statahead cache before */
1193 dentry_may_statahead(struct inode *dir, struct dentry *dentry)
1195 struct ll_inode_info *lli;
1196 struct ll_dentry_data *ldd;
1198 if (ll_i2sbi(dir)->ll_sa_max == 0)
1201 lli = ll_i2info(dir);
1203 /* statahead is not allowed for this dir, there may be three causes:
1204 * 1. dir is not opened.
1205 * 2. statahead hit ratio is too low.
1206 * 3. previous stat started statahead thread failed. */
1207 if (!lli->lli_sa_enabled)
1210 /* not the same process, don't statahead */
1211 if (lli->lli_opendir_pid != current_pid())
1215 * When stating a dentry, kernel may trigger 'revalidate' or 'lookup'
1216 * multiple times, eg. for 'getattr', 'getxattr' and etc.
1217 * For patchless client, lookup intent is not accurate, which may
1218 * misguide statahead. For example:
1219 * The 'revalidate' call for 'getattr' and 'getxattr' of a dentry will
1220 * have the same intent -- IT_GETATTR, while one dentry should access
1221 * statahead cache once, otherwise statahead windows is messed up.
1222 * The solution is as following:
1223 * Assign 'lld_sa_generation' with 'lli_sa_generation' when a dentry
1224 * IT_GETATTR for the first time, and subsequent IT_GETATTR will
1225 * bypass interacting with statahead cache by checking
1226 * 'lld_sa_generation == lli->lli_sa_generation'.
1228 ldd = ll_d2d(dentry);
1229 if (ldd != NULL && ldd->lld_sa_generation == lli->lli_sa_generation)
1235 /* llite ioctl register support rountine */
1241 #define LLIOC_MAX_CMD 256
1244 * Rules to write a callback function:
1247 * @magic: Dynamic ioctl call routine will feed this vaule with the pointer
1248 * returned to ll_iocontrol_register. Callback functions should use this
1249 * data to check the potential collasion of ioctl cmd. If collasion is
1250 * found, callback function should return LLIOC_CONT.
1251 * @rcp: The result of ioctl command.
1254 * If @magic matches the pointer returned by ll_iocontrol_data, the
1255 * callback should return LLIOC_STOP; return LLIOC_STOP otherwise.
1257 typedef enum llioc_iter (*llioc_callback_t)(struct inode *inode,
1258 struct file *file, unsigned int cmd, unsigned long arg,
1259 void *magic, int *rcp);
1261 /* export functions */
1262 /* Register ioctl block dynamatically for a regular file.
1264 * @cmd: the array of ioctl command set
1265 * @count: number of commands in the @cmd
1266 * @cb: callback function, it will be called if an ioctl command is found to
1267 * belong to the command list @cmd.
1270 * A magic pointer will be returned if success;
1271 * otherwise, NULL will be returned.
1273 void *ll_iocontrol_register(llioc_callback_t cb, int count, unsigned int *cmd);
1274 void ll_iocontrol_unregister(void *magic);
1276 int cl_sync_file_range(struct inode *inode, loff_t start, loff_t end,
1277 enum cl_fsync_mode mode, int ignore_layout);
1279 /** direct write pages */
1280 struct ll_dio_pages {
1281 /** page array to be written. we don't support
1282 * partial pages except the last one. */
1283 struct page **ldp_pages;
1284 /* offset of each page */
1285 loff_t *ldp_offsets;
1286 /** if ldp_offsets is NULL, it means a sequential
1287 * pages to be written, then this is the file offset
1288 * of the * first page. */
1289 loff_t ldp_start_offset;
1290 /** how many bytes are to be written. */
1292 /** # of pages in the array. */
1296 extern ssize_t ll_direct_rw_pages(const struct lu_env *env, struct cl_io *io,
1297 int rw, struct inode *inode,
1298 struct ll_dio_pages *pv);
1300 static inline int ll_file_nolock(const struct file *file)
1302 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
1303 struct inode *inode = file_inode((struct file *)file);
1305 LASSERT(fd != NULL);
1306 return ((fd->fd_flags & LL_FILE_IGNORE_LOCK) ||
1307 (ll_i2sbi(inode)->ll_flags & LL_SBI_NOLCK));
1310 static inline void ll_set_lock_data(struct obd_export *exp, struct inode *inode,
1311 struct lookup_intent *it, __u64 *bits)
1313 if (!it->it_lock_set) {
1314 struct lustre_handle handle;
1316 /* If this inode is a remote object, it will get two
1317 * separate locks in different namespaces, Master MDT,
1318 * where the name entry is, will grant LOOKUP lock,
1319 * remote MDT, where the object is, will grant
1320 * UPDATE|PERM lock. The inode will be attched to both
1321 * LOOKUP and PERM locks, so revoking either locks will
1322 * case the dcache being cleared */
1323 if (it->it_remote_lock_mode) {
1324 handle.cookie = it->it_remote_lock_handle;
1325 CDEBUG(D_DLMTRACE, "setting l_data to inode "DFID
1326 "(%p) for remote lock %#llx\n",
1327 PFID(ll_inode2fid(inode)), inode,
1329 md_set_lock_data(exp, &handle, inode, NULL);
1332 handle.cookie = it->it_lock_handle;
1334 CDEBUG(D_DLMTRACE, "setting l_data to inode "DFID"(%p)"
1335 " for lock %#llx\n",
1336 PFID(ll_inode2fid(inode)), inode, handle.cookie);
1338 md_set_lock_data(exp, &handle, inode, &it->it_lock_bits);
1339 it->it_lock_set = 1;
1343 *bits = it->it_lock_bits;
1346 static inline void ll_lock_dcache(struct inode *inode)
1348 #ifdef HAVE_DCACHE_LOCK
1349 spin_lock(&dcache_lock);
1351 spin_lock(&inode->i_lock);
1355 static inline void ll_unlock_dcache(struct inode *inode)
1357 #ifdef HAVE_DCACHE_LOCK
1358 spin_unlock(&dcache_lock);
1360 spin_unlock(&inode->i_lock);
1364 static inline int d_lustre_invalid(const struct dentry *dentry)
1366 struct ll_dentry_data *lld = ll_d2d(dentry);
1368 return (lld == NULL) || lld->lld_invalid;
1371 static inline void __d_lustre_invalidate(struct dentry *dentry)
1373 struct ll_dentry_data *lld = ll_d2d(dentry);
1376 lld->lld_invalid = 1;
1380 * Mark dentry INVALID, if dentry refcount is zero (this is normally case for
1381 * ll_md_blocking_ast), unhash this dentry, and let dcache to reclaim it later;
1382 * else dput() of the last refcount will unhash this dentry and kill it.
1384 static inline void d_lustre_invalidate(struct dentry *dentry, int nested)
1386 CDEBUG(D_DENTRY, "invalidate dentry %.*s (%p) parent %p inode %p "
1387 "refc %d\n", dentry->d_name.len, dentry->d_name.name, dentry,
1388 dentry->d_parent, dentry->d_inode, ll_d_count(dentry));
1390 spin_lock_nested(&dentry->d_lock,
1391 nested ? DENTRY_D_LOCK_NESTED : DENTRY_D_LOCK_NORMAL);
1392 __d_lustre_invalidate(dentry);
1394 * We should be careful about dentries created by d_obtain_alias().
1395 * These dentries are not put in the dentry tree, instead they are
1396 * linked to sb->s_anon through dentry->d_hash.
1397 * shrink_dcache_for_umount() shrinks the tree and sb->s_anon list.
1398 * If we unhashed such a dentry, unmount would not be able to find
1399 * it and busy inodes would be reported.
1401 if (ll_d_count(dentry) == 0 && !(dentry->d_flags & DCACHE_DISCONNECTED))
1403 spin_unlock(&dentry->d_lock);
1406 static inline void d_lustre_revalidate(struct dentry *dentry)
1408 spin_lock(&dentry->d_lock);
1409 LASSERT(ll_d2d(dentry) != NULL);
1410 ll_d2d(dentry)->lld_invalid = 0;
1411 spin_unlock(&dentry->d_lock);
1414 int ll_layout_conf(struct inode *inode, const struct cl_object_conf *conf);
1415 int ll_layout_refresh(struct inode *inode, __u32 *gen);
1416 int ll_layout_restore(struct inode *inode, loff_t start, __u64 length);
1418 int ll_xattr_init(void);
1419 void ll_xattr_fini(void);
1421 int ll_getxattr_common(struct inode *inode, const char *name,
1422 void *buffer, size_t size, __u64 valid);
1423 int ll_page_sync_io(const struct lu_env *env, struct cl_io *io,
1424 struct cl_page *page, enum cl_req_type crt);
1426 int ll_getparent(struct file *file, struct getparent __user *arg);
1429 int cl_setattr_ost(struct cl_object *obj, const struct iattr *attr,
1430 unsigned int attr_flags);
1432 extern struct lu_env *cl_inode_fini_env;
1433 extern __u16 cl_inode_fini_refcheck;
1435 int cl_file_inode_init(struct inode *inode, struct lustre_md *md);
1436 void cl_inode_fini(struct inode *inode);
1438 u64 cl_fid_build_ino(const struct lu_fid *fid, int api32);
1439 u32 cl_fid_build_gen(const struct lu_fid *fid);
1441 #ifndef HAVE_IOV_ITER_TRUNCATE
1442 static inline void iov_iter_truncate(struct iov_iter *i, u64 count)
1444 if (i->count > count)
1449 #ifndef HAVE_IS_SXID
1450 static inline bool is_sxid(umode_t mode)
1452 return (mode & S_ISUID) || ((mode & S_ISGID) && (mode & S_IXGRP));
1457 #define IS_NOSEC(inode) (!is_sxid(inode->i_mode))
1460 #ifndef HAVE_FILE_OPERATIONS_READ_WRITE_ITER
1461 static inline void iov_iter_reexpand(struct iov_iter *i, size_t count)
1466 static inline struct iovec iov_iter_iovec(const struct iov_iter *iter)
1468 return (struct iovec) {
1469 .iov_base = iter->iov->iov_base + iter->iov_offset,
1470 .iov_len = min(iter->count,
1471 iter->iov->iov_len - iter->iov_offset),
1475 #define iov_for_each(iov, iter, start) \
1476 for (iter = (start); \
1477 (iter).count && ((iov = iov_iter_iovec(&(iter))), 1); \
1478 iov_iter_advance(&(iter), (iov).iov_len))
1480 static inline ssize_t
1481 generic_file_read_iter(struct kiocb *iocb, struct iov_iter *iter)
1487 iov_for_each(iov, i, *iter) {
1490 res = generic_file_aio_read(iocb, &iov, 1, iocb->ki_pos);
1498 if (res < iov.iov_len)
1503 iov_iter_advance(iter, bytes);
1507 static inline ssize_t
1508 __generic_file_write_iter(struct kiocb *iocb, struct iov_iter *iter)
1514 iov_for_each(iov, i, *iter) {
1517 res = __generic_file_aio_write(iocb, &iov, 1, &iocb->ki_pos);
1525 if (res < iov.iov_len)
1530 iov_iter_advance(iter, bytes);
1533 #endif /* HAVE_FILE_OPERATIONS_READ_WRITE_ITER */
1534 #endif /* LLITE_INTERNAL_H */