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, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
32 #ifndef LLITE_INTERNAL_H
33 #define LLITE_INTERNAL_H
35 #include <lustre_disk.h> /* for s2sbi */
36 #include <lustre_linkea.h>
38 /* for struct cl_lock_descr and struct cl_io */
39 #include <cl_object.h>
40 #include <lustre_lmv.h>
41 #include <lustre_mdc.h>
42 #include <lustre_intent.h>
43 #include <linux/compat.h>
44 #include <linux/aio.h>
45 #include <linux/parser.h>
46 #include <linux/seqlock.h>
47 #include <lustre_compat.h>
48 #include <lustre_crypto.h>
49 #include <range_lock.h>
51 #include "vvp_internal.h"
53 #include "foreign_symlink.h"
59 #ifndef HAVE_VM_FAULT_RETRY
60 #define VM_FAULT_RETRY 0
63 /* Kernel 3.1 kills LOOKUP_CONTINUE, LOOKUP_PARENT is equivalent to it.
64 * seem kernel commit 49084c3bb2055c401f3493c13edae14d49128ca0 */
65 #ifndef LOOKUP_CONTINUE
66 #define LOOKUP_CONTINUE LOOKUP_PARENT
69 #ifdef HAVE_DENTRY_D_U_D_ALIAS
70 #define d_alias d_u.d_alias
73 /** Only used on client-side for indicating the tail of dir hash/offset. */
74 #define LL_DIR_END_OFF 0x7fffffffffffffffULL
75 #define LL_DIR_END_OFF_32BIT 0x7fffffffUL
77 /* 4UL * 1024 * 1024 */
78 #define LL_MAX_BLKSIZE_BITS 22
80 #define LL_IT2STR(it) ((it) ? ldlm_it2str((it)->it_op) : "0")
82 #define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET | ATTR_TIMES_SET)
84 struct ll_dentry_data {
85 unsigned int lld_sa_generation;
86 unsigned int lld_invalid:1;
87 struct rcu_head lld_rcu_head;
90 #define ll_d2d(de) ((struct ll_dentry_data*)((de)->d_fsdata))
92 #define LLI_INODE_MAGIC 0x111d0de5
93 #define LLI_INODE_DEAD 0xdeadd00d
95 struct ll_getname_data {
96 #ifdef HAVE_DIR_CONTEXT
97 struct dir_context ctx;
99 char *lgd_name; /* points to a buffer with NAME_MAX+1 size */
100 struct lu_fid lgd_fid; /* target fid we are looking for */
101 int lgd_found; /* inode matched? */
104 struct ll_grouplock {
105 struct lu_env *lg_env;
107 struct cl_lock *lg_lock;
108 unsigned long lg_gid;
111 /* See comment on trunc_sem_down_read_nowait */
112 struct ll_trunc_sem {
113 /* when positive, this is a count of readers, when -1, it indicates
114 * the semaphore is held for write, and 0 is unlocked
116 atomic_t ll_trunc_readers;
117 /* this tracks a count of waiting writers */
118 atomic_t ll_trunc_waiters;
122 LSA_PATTERN_NONE = 0x0000,
123 LSA_PATTERN_LIST = 0x0001,
124 LSA_PATTERN_FNAME = 0X0002,
128 struct ll_inode_info {
129 __u32 lli_inode_magic;
132 volatile unsigned long lli_flags;
133 struct posix_acl *lli_posix_acl;
135 /* identifying fields for both metadata and data stacks. */
136 struct lu_fid lli_fid;
137 /* master inode fid for stripe directory */
138 struct lu_fid lli_pfid;
140 /* We need all three because every inode may be opened in different
142 struct obd_client_handle *lli_mds_read_och;
143 struct obd_client_handle *lli_mds_write_och;
144 struct obd_client_handle *lli_mds_exec_och;
145 __u64 lli_open_fd_read_count;
146 __u64 lli_open_fd_write_count;
147 __u64 lli_open_fd_exec_count;
149 /* Protects access to och pointers and their usage counters */
150 struct mutex lli_och_mutex;
152 struct inode lli_vfs_inode;
154 /* the most recent timestamps obtained from mds */
159 spinlock_t lli_agl_lock;
160 bool lli_synced_to_mds;
162 /* inode specific open lock caching threshold */
163 u32 lli_open_thrsh_count;
164 /* Number of times this inode was opened */
165 u64 lli_open_fd_count;
166 /* When last close was performed on this inode */
167 ktime_t lli_close_fd_time;
169 /* Try to make the d::member and f::member are aligned. Before using
170 * these members, make clear whether it is directory or not. */
174 /* metadata statahead */
175 /* since parent-child threads can share the same @file
176 * struct, "opendir_key" is the token when dir close for
177 * case of parent exit before child -- it is me should
178 * cleanup the dir readahead. */
179 void *lli_opendir_key;
180 struct ll_statahead_info *lli_sai;
181 struct ll_statahead_context *lli_sax;
182 /* protect statahead stuff. */
183 spinlock_t lli_sa_lock;
184 /* "opendir_pid" is the token when lookup/revalid
185 * -- I am the owner of dir statahead. */
186 pid_t lli_opendir_pid;
187 /* directory depth to ROOT */
188 unsigned short lli_dir_depth;
189 /* directory depth to ancestor whose default LMV is
192 unsigned short lli_inherit_depth;
193 /* stat will try to access statahead entries or start
194 * statahead if this flag is set, and this flag will be
195 * set upon dir open, and cleared when dir is closed,
196 * statahead hit ratio is too low, or start statahead
198 unsigned short lli_sa_enabled:1,
199 /* default LMV is explicitly set in inode on MDT, this
200 * is for old server, or default LMV is set by
201 * "lfs setdirstripe -D".
203 lli_def_lsm_obj_set:1;
204 /* generation for statahead */
205 unsigned int lli_sa_generation;
206 /* access pattern for statahead */
207 enum ll_sa_pattern lli_sa_pattern;
208 /* rw lock protects lli_lsm_md */
209 struct rw_semaphore lli_lsm_sem;
210 /* directory stripe information */
211 struct lmv_stripe_object *lli_lsm_obj;
212 /* directory default LMV */
213 struct lmv_stripe_object *lli_def_lsm_obj;
216 /* for non-directory */
218 struct mutex lli_size_mutex;
219 struct task_struct *lli_size_lock_owner;
220 char *lli_symlink_name;
221 struct ll_trunc_sem lli_trunc_sem;
222 struct range_lock_tree lli_write_tree;
223 struct mutex lli_setattr_mutex;
225 struct rw_semaphore lli_glimpse_sem;
226 ktime_t lli_glimpse_time;
227 struct list_head lli_agl_list;
230 /* for writepage() only to communicate to fsync */
233 /* protect the file heat fields */
234 spinlock_t lli_heat_lock;
235 __u32 lli_heat_flags;
236 struct obd_heat_instance lli_heat_instances[OBD_HEAT_COUNT];
239 * Whenever a process try to read/write the file, the
240 * jobid, uid and gid of the process will be saved here,
241 * and it'll be packed into write RPC when flush later.
243 * So the read/write statistics or TBF rules for jobid,
244 * uid or gid will not be accurate if the file is shared
247 char lli_jobid[LUSTRE_JOBID_SIZE];
251 struct mutex lli_pcc_lock;
252 enum lu_pcc_state_flags lli_pcc_state;
254 * @lli_pcc_generation saves the gobal PCC generation
255 * when the file was successfully attached into PCC.
256 * The flags of the PCC dataset are saved in
258 * The gobal PCC generation will be increased when add
259 * or delete a PCC backend, or change the configuration
260 * parameters for PCC.
261 * If @lli_pcc_generation is same as the gobal PCC
262 * generation, we can use the saved flags of the PCC
263 * dataset to determine whether need to try auto attach
266 __u64 lli_pcc_generation;
267 enum pcc_dataset_flags lli_pcc_dsflags;
268 struct pcc_inode *lli_pcc_inode;
270 struct mutex lli_group_mutex;
271 __u64 lli_group_users;
272 unsigned long lli_group_gid;
274 __u64 lli_attr_valid;
276 __u64 lli_lazyblocks;
280 /* XXX: For following frequent used members, although they maybe special
281 * used for non-directory object, it is some time-wasting to check
282 * whether the object is directory or not before using them. On the
283 * other hand, currently, sizeof(f) > sizeof(d), it cannot reduce
284 * the "ll_inode_info" size even if moving those members into u.f.
285 * So keep them out side.
287 * In the future, if more members are added only for directory,
288 * some of the following members can be moved into u.f.
290 struct cl_object *lli_clob;
292 /* mutex to request for layout lock exclusively. */
293 struct mutex lli_layout_mutex;
294 struct task_struct *lli_layout_lock_owner;
295 /* Layout version, protected by lli_layout_lock */
296 __u32 lli_layout_gen;
297 spinlock_t lli_layout_lock;
299 __u32 lli_projid; /* project id */
301 struct rw_semaphore lli_xattrs_list_rwsem;
302 struct mutex lli_xattrs_enq_lock;
303 struct list_head lli_xattrs; /* ll_xattr_entry->xe_list */
304 struct list_head lli_lccs; /* list of ll_cl_context */
305 seqlock_t lli_page_inv_lock;
307 struct task_struct *lli_inode_lock_owner;
310 #ifndef HAVE_USER_NAMESPACE_ARG
311 #define inode_permission(ns, inode, mask) inode_permission(inode, mask)
312 #define generic_permission(ns, inode, mask) generic_permission(inode, mask)
313 #define simple_setattr(ns, de, iattr) simple_setattr(de, iattr)
314 #define ll_inode_permission(ns, inode, mask) ll_inode_permission(inode, mask)
315 #ifdef HAVE_INODEOPS_ENHANCED_GETATTR
316 #define ll_getattr(ns, path, stat, mask, fl) ll_getattr(path, stat, mask, fl)
317 #endif /* HAVE_INODEOPS_ENHANCED_GETATTR */
318 #define ll_setattr(ns, de, attr) ll_setattr(de, attr)
322 #define iocb_ki_flags_check(flag, name) (!!((flag) & IOCB_ ## name))
323 #define ki_flag(name) IOCB_ ## name
325 #define iocb_ki_flags_check(flag, name) (!!((flag) & O_ ## name))
326 #define ki_flag(name) O_ ## name
329 static inline void ll_trunc_sem_init(struct ll_trunc_sem *sem)
331 atomic_set(&sem->ll_trunc_readers, 0);
332 atomic_set(&sem->ll_trunc_waiters, 0);
335 /* This version of down read ignores waiting writers, meaning if the semaphore
336 * is already held for read, this down_read will 'join' that reader and also
337 * take the semaphore.
339 * This lets us avoid an unusual deadlock.
341 * We must take lli_trunc_sem in read mode on entry in to various i/o paths
342 * in Lustre, in order to exclude truncates. Some of these paths then need to
343 * take the mmap_lock, while still holding the trunc_sem. The problem is that
344 * page faults hold the mmap_lock when calling in to Lustre, and then must also
345 * take the trunc_sem to exclude truncate.
347 * This means the locking order for trunc_sem and mmap_lock is sometimes AB,
348 * sometimes BA. This is almost OK because in both cases, we take the trunc
349 * sem for read, so it doesn't block.
351 * However, if a write mode user (truncate, a setattr op) arrives in the
352 * middle of this, the second reader on the truncate_sem will wait behind that
355 * So we have, on our truncate sem, in order (where 'reader' and 'writer' refer
356 * to the mode in which they take the semaphore):
357 * reader (holding mmap_lock, needs truncate_sem)
359 * reader (holding truncate sem, waiting for mmap_lock)
361 * And so the readers deadlock.
363 * The solution is this modified semaphore, where this down_read ignores
364 * waiting write operations, and all waiters are woken up at once, so readers
365 * using down_read_nowait cannot get stuck behind waiting writers, regardless
366 * of the order they arrived in.
368 * down_read_nowait is only used in the page fault case, where we already hold
369 * the mmap_lock. This is because otherwise repeated read and write operations
370 * (which take the truncate sem) could prevent a truncate from ever starting.
371 * This could still happen with page faults, but without an even more complex
372 * mechanism, this is unavoidable.
376 static inline void trunc_sem_down_read_nowait(struct ll_trunc_sem *sem)
378 wait_var_event(&sem->ll_trunc_readers,
379 atomic_inc_unless_negative(&sem->ll_trunc_readers));
382 static inline void trunc_sem_down_read(struct ll_trunc_sem *sem)
384 wait_var_event(&sem->ll_trunc_readers,
385 atomic_read(&sem->ll_trunc_waiters) == 0 &&
386 atomic_inc_unless_negative(&sem->ll_trunc_readers));
389 static inline void trunc_sem_up_read(struct ll_trunc_sem *sem)
391 if (atomic_dec_return(&sem->ll_trunc_readers) == 0 &&
392 atomic_read(&sem->ll_trunc_waiters))
393 wake_up_var(&sem->ll_trunc_readers);
396 static inline void trunc_sem_down_write(struct ll_trunc_sem *sem)
398 atomic_inc(&sem->ll_trunc_waiters);
399 wait_var_event(&sem->ll_trunc_readers,
400 atomic_cmpxchg(&sem->ll_trunc_readers, 0, -1) == 0);
401 atomic_dec(&sem->ll_trunc_waiters);
404 static inline void trunc_sem_up_write(struct ll_trunc_sem *sem)
406 atomic_set(&sem->ll_trunc_readers, 0);
407 /* match the smp_mb() in wait_var_event()->prepare_to_wait() */
409 wake_up_var(&sem->ll_trunc_readers);
412 #ifdef CONFIG_LUSTRE_FS_POSIX_ACL
413 static inline void lli_clear_acl(struct ll_inode_info *lli)
415 if (lli->lli_posix_acl) {
416 posix_acl_release(lli->lli_posix_acl);
417 lli->lli_posix_acl = NULL;
421 static inline void lli_replace_acl(struct ll_inode_info *lli,
422 struct lustre_md *md)
424 write_lock(&lli->lli_lock);
425 if (lli->lli_posix_acl)
426 posix_acl_release(lli->lli_posix_acl);
427 lli->lli_posix_acl = md->posix_acl;
428 write_unlock(&lli->lli_lock);
431 static inline void lli_clear_acl(struct ll_inode_info *lli)
435 static inline void lli_replace_acl(struct ll_inode_info *lli,
436 struct lustre_md *md)
441 static inline __u32 ll_layout_version_get(struct ll_inode_info *lli)
445 spin_lock(&lli->lli_layout_lock);
446 gen = lli->lli_layout_gen;
447 spin_unlock(&lli->lli_layout_lock);
452 static inline void ll_layout_version_set(struct ll_inode_info *lli, __u32 gen)
454 spin_lock(&lli->lli_layout_lock);
455 lli->lli_layout_gen = gen;
456 spin_unlock(&lli->lli_layout_lock);
459 enum ll_inode_flags {
460 /* File data is modified. */
461 LLIF_DATA_MODIFIED = 0,
462 /* File is being restored */
463 LLIF_FILE_RESTORING = 1,
464 /* Xattr cache is attached to the file */
465 LLIF_XATTR_CACHE = 2,
466 /* Project inherit */
467 LLIF_PROJECT_INHERIT = 3,
468 /* update atime from MDS even if it's older than local inode atime. */
469 LLIF_UPDATE_ATIME = 4,
470 /* foreign file/dir can be unlinked unconditionnaly */
471 LLIF_FOREIGN_REMOVABLE = 5,
472 /* 6 is not used for now */
473 /* Xattr cache is filled */
474 LLIF_XATTR_CACHE_FILLED = 7,
478 int ll_xattr_cache_destroy(struct inode *inode);
479 int ll_xattr_cache_empty(struct inode *inode);
481 int ll_xattr_cache_get(struct inode *inode,
487 int ll_xattr_cache_insert(struct inode *inode,
492 static inline bool obd_connect_has_secctx(struct obd_connect_data *data)
494 #ifdef CONFIG_SECURITY
495 return data->ocd_connect_flags & OBD_CONNECT_FLAGS2 &&
496 data->ocd_connect_flags2 & OBD_CONNECT2_FILE_SECCTX;
502 static inline void obd_connect_set_secctx(struct obd_connect_data *data)
504 #ifdef CONFIG_SECURITY
505 data->ocd_connect_flags2 |= OBD_CONNECT2_FILE_SECCTX;
509 /* Only smack and selinux is known to use security contexts */
510 static inline bool ll_xattr_is_seclabel(const char *name)
512 return !strcmp(name, XATTR_NAME_SELINUX) ||
513 !strcmp(name, XATTR_NAME_SMACK);
516 static inline bool ll_xattr_suffix_is_seclabel(const char *suffix)
518 return !strcmp(suffix, XATTR_SELINUX_SUFFIX) ||
519 !strcmp(suffix, XATTR_SMACK_SUFFIX);
522 int ll_dentry_init_security(struct dentry *dentry, int mode, struct qstr *name,
523 const char **secctx_name, __u32 *secctx_name_size,
524 void **secctx, __u32 *secctx_size,
527 int ll_inode_init_security(struct dentry *dentry, struct inode *inode,
530 int ll_inode_notifysecctx(struct inode *inode,
531 void *secctx, __u32 secctxlen);
533 void ll_secctx_name_free(struct ll_sb_info *sbi);
535 int ll_secctx_name_store(struct inode *in);
537 __u32 ll_secctx_name_get(struct ll_sb_info *sbi, const char **secctx_name);
539 int ll_security_secctx_name_filter(struct ll_sb_info *sbi, int xattr_type,
542 static inline bool obd_connect_has_enc(struct obd_connect_data *data)
544 #ifdef HAVE_LUSTRE_CRYPTO
545 return data->ocd_connect_flags & OBD_CONNECT_FLAGS2 &&
546 data->ocd_connect_flags2 & OBD_CONNECT2_ENCRYPT;
552 static inline void obd_connect_set_enc(struct obd_connect_data *data)
554 #ifdef HAVE_LUSTRE_CRYPTO
555 data->ocd_connect_flags2 |= OBD_CONNECT2_ENCRYPT;
559 static inline bool obd_connect_has_name_enc(struct obd_connect_data *data)
561 #ifdef HAVE_LUSTRE_CRYPTO
562 return data->ocd_connect_flags & OBD_CONNECT_FLAGS2 &&
563 data->ocd_connect_flags2 & OBD_CONNECT2_ENCRYPT_NAME;
569 static inline void obd_connect_set_name_enc(struct obd_connect_data *data)
571 #ifdef HAVE_LUSTRE_CRYPTO
572 data->ocd_connect_flags2 |= OBD_CONNECT2_ENCRYPT_NAME;
576 static inline bool obd_connect_has_enc_fid2path(struct obd_connect_data *data)
578 #ifdef HAVE_LUSTRE_CRYPTO
579 return data->ocd_connect_flags & OBD_CONNECT_FLAGS2 &&
580 data->ocd_connect_flags2 & OBD_CONNECT2_ENCRYPT_FID2PATH;
586 static inline void obd_connect_set_enc_fid2path(struct obd_connect_data *data)
588 #ifdef HAVE_LUSTRE_CRYPTO
589 data->ocd_connect_flags2 |= OBD_CONNECT2_ENCRYPT_FID2PATH;
594 * Locking to guarantee consistency of non-atomic updates to long long i_size,
595 * consistency between file size and KMS.
597 * Implemented by ->lli_size_mutex and ->lsm_lock, nested in that order.
600 void ll_inode_size_lock(struct inode *inode);
601 void ll_inode_size_unlock(struct inode *inode);
602 int ll_inode_size_trylock(struct inode *inode);
604 static inline struct ll_inode_info *ll_i2info(struct inode *inode)
606 return container_of(inode, struct ll_inode_info, lli_vfs_inode);
609 static inline struct pcc_inode *ll_i2pcci(struct inode *inode)
611 return ll_i2info(inode)->lli_pcc_inode;
614 static inline void ll_set_inode_lock_owner(struct inode *inode)
616 ll_i2info(inode)->lli_inode_lock_owner = current;
619 static inline void ll_clear_inode_lock_owner(struct inode *inode)
621 ll_i2info(inode)->lli_inode_lock_owner = NULL;
624 static inline struct task_struct *ll_get_inode_lock_owner(struct inode *inode)
626 return ll_i2info(inode)->lli_inode_lock_owner;
629 /* lock inode and set inode lock owener */
630 static inline void ll_inode_lock(struct inode *inode)
633 ll_set_inode_lock_owner(inode);
636 /* clear inode lock owner and unlock it */
637 static inline void ll_inode_unlock(struct inode *inode)
639 ll_clear_inode_lock_owner(inode);
643 /* default to use at least 16M for fast read if possible */
644 #define RA_REMAIN_WINDOW_MIN MiB_TO_PAGES(16UL)
646 /* default read-ahead on a given client mountpoint. */
647 #define SBI_DEFAULT_READ_AHEAD_MAX MiB_TO_PAGES(1024UL)
649 /* default read-ahead for a single file descriptor */
650 #define SBI_DEFAULT_READ_AHEAD_PER_FILE_MAX MiB_TO_PAGES(256UL)
652 /* default read-ahead full files smaller than limit on the second read */
653 #define SBI_DEFAULT_READ_AHEAD_WHOLE_MAX MiB_TO_PAGES(2UL)
655 /* default range pages */
656 #define SBI_DEFAULT_RA_RANGE_PAGES MiB_TO_PAGES(1ULL)
658 /* Min range pages */
659 #define RA_MIN_MMAP_RANGE_PAGES 16UL
664 RA_STAT_DISTANT_READPAGE,
665 RA_STAT_MISS_IN_WINDOW,
666 RA_STAT_FAILED_GRAB_PAGE,
667 RA_STAT_FAILED_MATCH,
672 RA_STAT_MAX_IN_FLIGHT,
673 RA_STAT_WRONG_GRAB_PAGE,
674 RA_STAT_FAILED_REACH_END,
676 RA_STAT_FAILED_FAST_READ,
677 RA_STAT_MMAP_RANGE_READ,
678 RA_STAT_READAHEAD_PAGES,
683 atomic_t ra_cur_pages;
684 unsigned long ra_max_pages;
685 unsigned long ra_max_pages_per_file;
686 unsigned long ra_range_pages;
687 unsigned long ra_max_read_ahead_whole_pages;
688 struct workqueue_struct *ll_readahead_wq;
690 * Max number of active works could be triggered
691 * for async readahead.
693 unsigned int ra_async_max_active;
694 /* how many async readahead triggered in flight */
695 atomic_t ra_async_inflight;
696 /* Threshold to control when to trigger async readahead */
697 unsigned long ra_async_pages_per_file_threshold;
700 /* ra_io_arg will be filled in the beginning of ll_readahead with
701 * ras_lock, then the following ll_read_ahead_pages will read RA
702 * pages according to this arg, all the items in this structure are
703 * counted by page index.
706 pgoff_t ria_start_idx; /* start offset of read-ahead*/
707 pgoff_t ria_end_idx; /* end offset of read-ahead*/
708 unsigned long ria_reserved; /* reserved pages for read-ahead */
709 pgoff_t ria_end_idx_min;/* minimum end to cover current read */
710 bool ria_eof; /* reach end of file */
711 /* If stride read pattern is detected, ria_stoff is the byte offset
712 * where stride read is started. Note: for normal read-ahead, the
713 * value here is meaningless, and also it will not be accessed*/
715 /* ria_length and ria_bytes are the length and pages length in the
716 * stride I/O mode. And they will also be used to check whether
717 * it is stride I/O read-ahead in the read-ahead pages*/
722 /* LL_HIST_MAX=32 causes an overflow */
723 #define LL_HIST_MAX 28
724 #define LL_HIST_START 12 /* buckets start at 2^12 = 4k */
725 #define LL_PROCESS_HIST_MAX 10
726 struct per_process_info {
728 struct obd_histogram pp_r_hist;
729 struct obd_histogram pp_w_hist;
732 /* pp_extents[LL_PROCESS_HIST_MAX] will hold the combined process info */
733 struct ll_rw_extents_info {
735 struct per_process_info pp_extents[LL_PROCESS_HIST_MAX + 1];
738 #define LL_OFFSET_HIST_MAX 100
739 struct ll_rw_process_info {
742 loff_t rw_range_start;
744 loff_t rw_last_file_pos;
746 size_t rw_smallest_extent;
747 size_t rw_largest_extent;
748 struct ll_file_data *rw_last_file;
751 enum stats_track_type {
752 STATS_TRACK_ALL = 0, /* track all processes */
753 STATS_TRACK_PID, /* track process with this pid */
754 STATS_TRACK_PPID, /* track processes with this ppid */
755 STATS_TRACK_GID, /* track processes with this gid */
759 /* flags for sbi->ll_flags */
761 LL_SBI_NOLCK, /* DLM locking disabled directio-only */
762 LL_SBI_CHECKSUM, /* checksum each page as it's written */
763 LL_SBI_LOCALFLOCK, /* local flocks instead of fs-wide */
764 LL_SBI_FLOCK, /* flock enabled */
765 LL_SBI_USER_XATTR, /* support user xattr */
766 LL_SBI_LRU_RESIZE, /* lru resize support */
767 LL_SBI_LAZYSTATFS, /* lazystatfs mount option */
768 LL_SBI_32BIT_API, /* generate 32 bit inodes. */
769 LL_SBI_USER_FID2PATH, /* fid2path by unprivileged users */
770 LL_SBI_VERBOSE, /* verbose mount/umount */
771 LL_SBI_ALWAYS_PING, /* ping even if server suppress_pings */
772 LL_SBI_TEST_DUMMY_ENCRYPTION, /* test dummy encryption */
773 LL_SBI_ENCRYPT, /* client side encryption */
774 LL_SBI_FOREIGN_SYMLINK, /* foreign fake-symlink support */
775 LL_SBI_FOREIGN_SYMLINK_UPCALL, /* foreign fake-symlink upcall set */
776 LL_SBI_NUM_MOUNT_OPT,
778 LL_SBI_ACL, /* support ACL */
779 LL_SBI_AGL_ENABLED, /* enable agl */
780 LL_SBI_64BIT_HASH, /* support 64-bits dir hash/offset */
781 LL_SBI_LAYOUT_LOCK, /* layout lock support */
782 LL_SBI_XATTR_CACHE, /* support for xattr cache */
783 LL_SBI_NOROOTSQUASH, /* do not apply root squash */
784 LL_SBI_FAST_READ, /* fast read support */
785 LL_SBI_FILE_SECCTX, /* file security context at create */
786 LL_SBI_TINY_WRITE, /* tiny write support */
787 LL_SBI_FILE_HEAT, /* file heat support */
788 LL_SBI_PARALLEL_DIO, /* parallel (async) O_DIRECT RPCs */
789 LL_SBI_ENCRYPT_NAME, /* name encryption */
790 LL_SBI_UNALIGNED_DIO, /* unaligned DIO */
794 int ll_sbi_flags_seq_show(struct seq_file *m, void *v);
796 /* This is embedded into llite super-blocks to keep track of connect
797 * flags (capabilities) supported by all imports given mount is
799 struct lustre_client_ocd {
800 /* This is conjunction of connect_flags across all imports
801 * (LOVs) this mount is connected to. This field is updated by
802 * cl_ocd_update() under ->lco_lock. */
804 struct mutex lco_lock;
805 struct obd_export *lco_md_exp;
806 struct obd_export *lco_dt_exp;
810 /* this protects pglist and ra_info. It isn't safe to
811 * grab from interrupt contexts */
813 spinlock_t ll_pp_extent_lock; /* pp_extent entry*/
814 spinlock_t ll_process_lock; /* ll_rw_process_info */
815 struct lustre_sb_info *lsi;
816 struct obd_uuid ll_sb_uuid;
817 struct obd_export *ll_md_exp;
818 struct obd_export *ll_dt_exp;
819 struct obd_device *ll_md_obd;
820 struct obd_device *ll_dt_obd;
821 struct dentry *ll_debugfs_entry;
822 struct lu_fid ll_root_fid; /* root object fid */
823 struct mnt_namespace *ll_mnt_ns;
825 DECLARE_BITMAP(ll_flags, LL_SBI_NUM_FLAGS); /* enum ll_sbi_flags */
826 unsigned int ll_xattr_cache_enabled:1,
827 ll_xattr_cache_set:1, /* already set to 0/1 */
828 ll_client_common_fill_super_succeeded:1,
830 ll_inode_cache_enabled:1,
831 ll_enable_statahead_fname:1;
833 struct lustre_client_ocd ll_lco;
835 struct lprocfs_stats *ll_stats; /* lprocfs stats counter */
837 /* Used to track "unstable" pages on a client, and maintain a
838 * LRU list of clean pages. An "unstable" page is defined as
839 * any page which is sent to a server as part of a bulk request,
840 * but is uncommitted to stable storage. */
841 struct cl_client_cache *ll_cache;
843 struct lprocfs_stats *ll_ra_stats;
845 struct ll_ra_info ll_ra_info;
846 unsigned int ll_namelen;
847 const struct file_operations *ll_fop;
849 struct lu_site *ll_site;
850 struct cl_device *ll_cl;
853 struct ll_rw_extents_info *ll_rw_extents_info;
854 int ll_extent_process_count;
855 unsigned int ll_offset_process_count;
856 struct ll_rw_process_info *ll_rw_process_info;
857 struct ll_rw_process_info *ll_rw_offset_info;
858 ktime_t ll_process_stats_init;
859 unsigned int ll_rw_offset_entry_count;
860 int ll_stats_track_id;
861 enum stats_track_type ll_stats_track_type;
864 /* metadata stat-ahead */
865 unsigned int ll_sa_running_max;/* max concurrent
866 * statahead instances */
867 unsigned int ll_sa_batch_max;/* max SUB request count in
868 * a batch PTLRPC request */
869 unsigned int ll_sa_max; /* max statahead RPCs */
870 atomic_t ll_sa_total; /* statahead thread started
872 atomic_t ll_sa_wrong; /* statahead thread stopped for
874 atomic_t ll_sa_running; /* running statahead thread
876 atomic_t ll_agl_total; /* AGL thread started count */
877 atomic_t ll_sa_hit_total; /* total hit count */
878 atomic_t ll_sa_miss_total; /* total miss count */
880 dev_t ll_sdev_orig; /* save s_dev before assign for
883 struct root_squash_info ll_squash;
886 /* st_blksize returned by stat(2), when non-zero */
887 unsigned int ll_stat_blksize;
889 /* maximum relative age of cached statfs results */
890 unsigned int ll_statfs_max_age;
892 struct kset ll_kset; /* sysfs object */
893 struct completion ll_kobj_unregister;
896 unsigned int ll_heat_decay_weight;
897 unsigned int ll_heat_period_second;
899 /* Opens of the same inode before we start requesting open lock */
900 u32 ll_oc_thrsh_count;
902 /* Time in ms between last inode close and next open to be considered
903 * instant back to back and would trigger an open lock request
907 /* Time in ms after last file close that we no longer count prior opens*/
910 /* filesystem fsname */
911 char ll_fsname[LUSTRE_MAXFSNAME + 1];
913 /* Persistent Client Cache */
914 struct pcc_super ll_pcc_super;
916 /* to protect vs updates in all following foreign symlink fields */
917 struct rw_semaphore ll_foreign_symlink_sem;
918 /* foreign symlink path prefix */
919 char *ll_foreign_symlink_prefix;
920 /* full prefix size including leading '\0' */
921 size_t ll_foreign_symlink_prefix_size;
922 /* foreign symlink path upcall */
923 char *ll_foreign_symlink_upcall;
924 /* foreign symlink path upcall infos */
925 struct ll_foreign_symlink_upcall_item *ll_foreign_symlink_upcall_items;
926 /* foreign symlink path upcall nb infos */
927 unsigned int ll_foreign_symlink_upcall_nb_items;
929 /* cached file security context xattr name. e.g: security.selinux */
930 char *ll_secctx_name;
931 __u32 ll_secctx_name_size;
934 #define SBI_DEFAULT_HEAT_DECAY_WEIGHT ((80 * 256 + 50) / 100)
935 #define SBI_DEFAULT_HEAT_PERIOD_SECOND (60)
937 #define SBI_DEFAULT_OPENCACHE_THRESHOLD_COUNT (5)
938 #define SBI_DEFAULT_OPENCACHE_THRESHOLD_MS (100) /* 0.1 second */
939 #define SBI_DEFAULT_OPENCACHE_THRESHOLD_MAX_MS (60000) /* 1 minute */
942 * per file-descriptor read-ahead data.
944 struct ll_readahead_state {
946 /* End byte that read(2) try to read. */
947 loff_t ras_last_read_end_bytes;
949 * number of bytes read after last read-ahead window reset. As window
950 * is reset on each seek, this is effectively a number of consecutive
951 * accesses. Maybe ->ras_accessed_in_window is better name.
953 * XXX nikita: window is also reset (by ras_update()) when Lustre
954 * believes that memory pressure evicts read-ahead pages. In that
955 * case, it probably doesn't make sense to expand window to
956 * PTLRPC_MAX_BRW_PAGES on the third access.
958 loff_t ras_consecutive_bytes;
960 * number of read requests after the last read-ahead window reset
961 * As window is reset on each seek, this is effectively the number
962 * on consecutive read request and is used to trigger read-ahead.
964 unsigned long ras_consecutive_requests;
966 * Parameters of current read-ahead window. Handled by
967 * ras_update(). On the initial access to the file or after a seek,
968 * window is reset to 0. After 3 consecutive accesses, window is
969 * expanded to PTLRPC_MAX_BRW_PAGES. Afterwards, window is enlarged by
970 * PTLRPC_MAX_BRW_PAGES chunks up to ->ra_max_pages.
972 pgoff_t ras_window_start_idx;
973 pgoff_t ras_window_pages;
975 /* Page index where min range read starts */
976 pgoff_t ras_range_min_start_idx;
977 /* Page index where mmap range read ends */
978 pgoff_t ras_range_max_end_idx;
979 /* number of mmap pages where last time detected */
980 pgoff_t ras_last_range_pages;
981 /* number of mmap range requests */
982 pgoff_t ras_range_requests;
985 * Optimal RPC size in pages.
986 * It decides how many pages will be sent for each read-ahead.
988 unsigned long ras_rpc_pages;
990 * Where next read-ahead should start at. This lies within read-ahead
991 * window. Read-ahead window is read in pieces rather than at once
992 * because: 1. lustre limits total number of pages under read-ahead by
993 * ->ra_max_pages (see ll_ra_count_get()), 2. client cannot read pages
994 * not covered by DLM lock.
996 pgoff_t ras_next_readahead_idx;
998 * Total number of ll_file_read requests issued, reads originating
999 * due to mmap are not counted in this total. This value is used to
1000 * trigger full file read-ahead after multiple reads to a small file.
1002 unsigned long ras_requests;
1004 * The following 3 items are used for detecting the stride I/O
1006 * In stride I/O mode,
1007 * ...............|-----data-----|****gap*****|--------|******|....
1008 * offset |-stride_bytes-|-stride_gap-|
1009 * ras_stride_offset = offset;
1010 * ras_stride_length = stride_bytes + stride_gap;
1011 * ras_stride_bytes = stride_bytes;
1012 * Note: all these three items are counted by bytes.
1014 loff_t ras_stride_offset;
1015 loff_t ras_stride_length;
1016 loff_t ras_stride_bytes;
1018 * number of consecutive stride request count, and it is similar as
1019 * ras_consecutive_requests, but used for stride I/O mode.
1020 * Note: only more than 2 consecutive stride request are detected,
1021 * stride read-ahead will be enable
1023 unsigned long ras_consecutive_stride_requests;
1024 /* index of the last page that async readahead starts */
1025 pgoff_t ras_async_last_readpage_idx;
1026 /* whether we should increase readahead window */
1027 bool ras_need_increase_window;
1028 /* whether ra miss check should be skipped */
1029 bool ras_no_miss_check;
1032 struct ll_readahead_work {
1033 /** File to readahead */
1034 struct file *lrw_file;
1035 pgoff_t lrw_start_idx;
1036 pgoff_t lrw_end_idx;
1039 /* async worker to handler read */
1040 struct work_struct lrw_readahead_work;
1041 char lrw_jobid[LUSTRE_JOBID_SIZE];
1044 extern struct kmem_cache *ll_file_data_slab;
1045 struct lustre_handle;
1046 struct ll_file_data {
1047 struct ll_readahead_state fd_ras;
1048 struct ll_grouplock fd_grouplock;
1052 /* openhandle if lease exists for this file.
1053 * Borrow lli->lli_och_mutex to protect assignment */
1054 struct obd_client_handle *fd_lease_och;
1055 struct obd_client_handle *fd_och;
1056 struct file *fd_file;
1057 /* Indicate whether need to report failure when close.
1058 * true: failure is known, not report again.
1059 * false: unknown failure, should report. */
1060 bool fd_write_failed;
1061 bool ll_lock_no_expand;
1062 /* Used by mirrored file to lead IOs to a specific mirror, usually
1063 * for mirror resync. 0 means default. */
1064 __u32 fd_designated_mirror;
1065 /* The layout version when resync starts. Resync I/O should carry this
1066 * layout version for verification to OST objects */
1067 __u32 fd_layout_version;
1068 struct pcc_file fd_pcc_file;
1069 /* striped directory may read partially if some stripe inaccessible,
1070 * -errno is saved here, and will return to user in close().
1072 int fd_partial_readdir_rc;
1073 /* mdtest unique/shared dir stat mode: per process statahead struct. */
1074 struct ll_statahead_info *fd_sai;
1077 void llite_tunables_unregister(void);
1078 int llite_tunables_register(void);
1080 static inline struct inode *ll_info2i(struct ll_inode_info *lli)
1082 return &lli->lli_vfs_inode;
1085 __u32 ll_i2suppgid(struct inode *i);
1086 void ll_i2gids(__u32 *suppgids, struct inode *i1,struct inode *i2);
1088 static inline int ll_need_32bit_api(struct ll_sb_info *sbi)
1090 #if BITS_PER_LONG == 32
1092 #elif defined(CONFIG_COMPAT)
1093 if (unlikely(test_bit(LL_SBI_32BIT_API, sbi->ll_flags)))
1096 # ifdef CONFIG_X86_X32
1097 /* in_compat_syscall() returns true when called from a kthread
1098 * and CONFIG_X86_X32 is enabled, which is wrong. So check
1099 * whether the caller comes from a syscall (ie. not a kthread)
1100 * before calling in_compat_syscall(). */
1101 if (current->flags & PF_KTHREAD)
1105 return unlikely(in_compat_syscall());
1107 return unlikely(test_bit(LL_SBI_32BIT_API, sbi->ll_flags));
1111 static inline bool ll_sbi_has_fast_read(struct ll_sb_info *sbi)
1113 return test_bit(LL_SBI_FAST_READ, sbi->ll_flags);
1116 static inline bool ll_sbi_has_tiny_write(struct ll_sb_info *sbi)
1118 return test_bit(LL_SBI_TINY_WRITE, sbi->ll_flags);
1121 static inline bool ll_sbi_has_file_heat(struct ll_sb_info *sbi)
1123 return test_bit(LL_SBI_FILE_HEAT, sbi->ll_flags);
1126 static inline bool ll_sbi_has_foreign_symlink(struct ll_sb_info *sbi)
1128 return test_bit(LL_SBI_FOREIGN_SYMLINK, sbi->ll_flags);
1131 static inline bool ll_sbi_has_parallel_dio(struct ll_sb_info *sbi)
1133 return test_bit(LL_SBI_PARALLEL_DIO, sbi->ll_flags);
1136 static inline bool ll_sbi_has_unaligned_dio(struct ll_sb_info *sbi)
1138 return test_bit(LL_SBI_UNALIGNED_DIO, sbi->ll_flags);
1141 void ll_ras_enter(struct file *f, loff_t pos, size_t bytes);
1143 /* llite/lcommon_misc.c */
1144 int cl_ocd_update(struct obd_device *host, struct obd_device *watched,
1145 enum obd_notify_event ev, void *owner);
1146 int cl_get_grouplock(struct cl_object *obj, unsigned long gid, int nonblock,
1147 struct ll_grouplock *lg);
1148 void cl_put_grouplock(struct ll_grouplock *lg);
1150 /* llite/lproc_llite.c */
1151 int ll_debugfs_register_super(struct super_block *sb, const char *name);
1152 void ll_debugfs_unregister_super(struct super_block *sb);
1153 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, long count);
1154 void ll_free_rw_stats_info(struct ll_sb_info *sbi);
1157 LPROC_LL_READ_BYTES,
1158 LPROC_LL_WRITE_BYTES,
1185 LPROC_LL_GETXATTR_HITS,
1187 LPROC_LL_REMOVEXATTR,
1188 LPROC_LL_INODE_PERM,
1190 LPROC_LL_INODE_OCOUNT,
1191 LPROC_LL_INODE_OPCLTM,
1192 LPROC_LL_FILE_OPCODES
1196 enum get_default_layout_type {
1197 GET_DEFAULT_LAYOUT_ROOT = 1,
1200 extern const struct file_operations ll_dir_operations;
1201 extern const struct inode_operations ll_dir_inode_operations;
1202 #ifdef HAVE_DIR_CONTEXT
1203 int ll_dir_read(struct inode *inode, __u64 *pos, struct md_op_data *op_data,
1204 struct dir_context *ctx, int *partial_readdir_rc);
1206 int ll_dir_read(struct inode *inode, __u64 *pos, struct md_op_data *op_data,
1207 void *cookie, filldir_t filldir, int *partial_readdir_rc);
1209 int ll_get_mdt_idx(struct inode *inode);
1210 int ll_get_mdt_idx_by_fid(struct ll_sb_info *sbi, const struct lu_fid *fid);
1211 struct page *ll_get_dir_page(struct inode *dir, struct md_op_data *op_data,
1212 __u64 offset, int *partial_readdir_rc);
1213 void ll_release_page(struct inode *inode, struct page *page, bool remove);
1214 int quotactl_ioctl(struct super_block *sb, struct if_quotactl *qctl);
1217 extern const struct inode_operations ll_special_inode_operations;
1219 struct inode *ll_iget(struct super_block *sb, ino_t hash,
1220 struct lustre_md *lic);
1221 int ll_test_inode_by_fid(struct inode *inode, void *opaque);
1222 int ll_md_blocking_ast(struct ldlm_lock *, struct ldlm_lock_desc *,
1223 void *data, int flag);
1224 struct dentry *ll_splice_alias(struct inode *inode, struct dentry *de);
1225 int ll_rmdir_entry(struct inode *dir, char *name, int namelen);
1226 void ll_update_times(struct ptlrpc_request *request, struct inode *inode);
1229 int ll_writepage(struct page *page, struct writeback_control *wbc);
1230 int ll_writepages(struct address_space *, struct writeback_control *wbc);
1231 int ll_readpage(struct file *file, struct page *page);
1232 #ifdef HAVE_AOPS_READ_FOLIO
1233 int ll_read_folio(struct file *file, struct folio *folio);
1235 int ll_io_read_page(const struct lu_env *env, struct cl_io *io,
1236 struct cl_page *page, struct file *file);
1237 void ll_readahead_init(struct inode *inode, struct ll_readahead_state *ras);
1238 int vvp_io_write_commit(const struct lu_env *env, struct cl_io *io);
1241 void ll_cl_add(struct inode *inode, const struct lu_env *env, struct cl_io *io,
1242 enum lcc_type type);
1243 void ll_cl_remove(struct inode *inode, const struct lu_env *env);
1244 struct ll_cl_context *ll_cl_find(struct inode *inode);
1246 extern const struct address_space_operations ll_aops;
1249 extern const struct inode_operations ll_file_inode_operations;
1250 const struct file_operations *ll_select_file_operations(struct ll_sb_info *sbi);
1251 extern int ll_have_md_lock(struct obd_export *exp, struct inode *inode,
1252 __u64 *bits, enum ldlm_mode l_req_mode);
1253 extern enum ldlm_mode ll_take_md_lock(struct inode *inode, __u64 bits,
1254 struct lustre_handle *lockh, __u64 flags,
1255 enum ldlm_mode mode);
1257 int ll_file_open(struct inode *inode, struct file *file);
1258 int ll_file_release(struct inode *inode, struct file *file);
1259 int ll_release_openhandle(struct dentry *, struct lookup_intent *);
1260 int ll_md_real_close(struct inode *inode, fmode_t fmode);
1261 void ll_track_file_opens(struct inode *inode);
1262 extern void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
1263 struct ll_file_data *file, loff_t pos,
1264 size_t count, int rw);
1265 #if defined(HAVE_USER_NAMESPACE_ARG) || defined(HAVE_INODEOPS_ENHANCED_GETATTR)
1266 int ll_getattr(struct mnt_idmap *, const struct path *path,
1267 struct kstat *stat, u32 request_mask, unsigned int flags);
1269 int ll_getattr(struct vfsmount *mnt, struct dentry *de, struct kstat *stat);
1270 #endif /* HAVE_USER_NAMESPACE_ARG */
1271 int ll_getattr_dentry(struct dentry *de, struct kstat *stat, u32 request_mask,
1272 unsigned int flags, bool foreign);
1273 #ifdef CONFIG_LUSTRE_FS_POSIX_ACL
1274 struct posix_acl *ll_get_acl(
1275 #ifdef HAVE_ACL_WITH_DENTRY
1276 struct mnt_idmap *, struct dentry *, int);
1277 #elif defined HAVE_GET_ACL_RCU_ARG
1278 struct inode *inode, int type, bool rcu);
1280 struct inode *inode, int type);
1281 #endif /* HAVE_GET_ACL_RCU_ARG */
1283 int ll_set_acl(struct mnt_idmap *mnt_userns,
1284 #ifdef HAVE_ACL_WITH_DENTRY
1285 struct dentry *dentry,
1287 struct inode *inode,
1289 struct posix_acl *acl, int type);
1290 #else /* !CONFIG_LUSTRE_FS_POSIX_ACL */
1291 #define ll_get_acl NULL
1292 #define ll_set_acl NULL
1293 #endif /* CONFIG_LUSTRE_FS_POSIX_ACL */
1295 static inline int ll_xflags_to_inode_flags(int xflags)
1297 return ((xflags & FS_XFLAG_SYNC) ? S_SYNC : 0) |
1298 ((xflags & FS_XFLAG_NOATIME) ? S_NOATIME : 0) |
1299 ((xflags & FS_XFLAG_APPEND) ? S_APPEND : 0) |
1300 ((xflags & FS_XFLAG_IMMUTABLE) ? S_IMMUTABLE : 0);
1303 static inline int ll_inode_flags_to_xflags(int inode_flags)
1305 return ((inode_flags & S_SYNC) ? FS_XFLAG_SYNC : 0) |
1306 ((inode_flags & S_NOATIME) ? FS_XFLAG_NOATIME : 0) |
1307 ((inode_flags & S_APPEND) ? FS_XFLAG_APPEND : 0) |
1308 ((inode_flags & S_IMMUTABLE) ? FS_XFLAG_IMMUTABLE : 0);
1311 int ll_migrate(struct inode *parent, struct file *file,
1312 struct lmv_user_md *lum, const char *name, __u32 flags);
1313 int ll_get_fid_by_name(struct inode *parent, const char *name,
1314 int namelen, struct lu_fid *fid, struct inode **inode);
1315 int ll_inode_permission(struct mnt_idmap *, struct inode *inode, int mask);
1316 int ll_ioctl_check_project(struct inode *inode, __u32 xflags, __u32 projid);
1317 int ll_set_project(struct inode *inode, __u32 xflags, __u32 projid);
1318 #ifndef HAVE_FILEATTR_GET
1319 int ll_ioctl_fsgetxattr(struct inode *inode, unsigned int cmd,
1321 int ll_ioctl_fssetxattr(struct inode *inode, unsigned int cmd,
1324 int ll_ioctl_project(struct file *file, unsigned int cmd, void __user *uarg);
1325 int ll_ioctl_ahead(struct file *file, struct llapi_lu_ladvise2 *ladvise);
1327 int ll_lov_setstripe_ea_info(struct inode *inode, struct dentry *dentry,
1328 __u64 flags, struct lov_user_md *lum,
1330 int ll_lov_getstripe_ea_info(struct inode *inode, const char *filename,
1331 struct lov_mds_md **lmm, int *lmm_size,
1332 struct ptlrpc_request **request);
1333 int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump,
1335 int ll_dir_get_default_layout(struct inode *inode, void **plmm, int *plmm_size,
1336 struct ptlrpc_request **request, u64 valid,
1337 enum get_default_layout_type type);
1338 int ll_dir_getstripe_default(struct inode *inode, void **lmmp,
1339 int *lmm_size, struct ptlrpc_request **request,
1340 struct ptlrpc_request **root_request, u64 valid);
1341 int ll_dir_getstripe(struct inode *inode, void **plmm, int *plmm_size,
1342 struct ptlrpc_request **request, u64 valid);
1343 int ll_fsync(struct file *file, loff_t start, loff_t end, int data);
1344 int ll_merge_attr(const struct lu_env *env, struct inode *inode);
1345 int ll_merge_attr_try(const struct lu_env *env, struct inode *inode);
1346 int ll_fid2path(struct inode *inode, void __user *arg);
1347 int __ll_fid2path(struct inode *inode, struct getinfo_fid2path *gfout,
1348 size_t outsize, __u32 pathlen_orig);
1349 int ll_data_version(struct inode *inode, __u64 *data_version, int flags);
1350 int ll_hsm_release(struct inode *inode);
1351 int ll_hsm_state_set(struct inode *inode, struct hsm_state_set *hss);
1352 void ll_io_set_mirror(struct cl_io *io, const struct file *file);
1354 /* llite/dcache.c */
1356 extern const struct dentry_operations ll_d_ops;
1358 bool ll_d_setup(struct dentry *de, bool do_put);
1360 static inline bool lld_is_init(struct dentry *dentry)
1362 return ll_d2d(dentry);
1365 #define ll_d_setup(de, do_put) (true)
1366 #define lld_is_init(dentry) (true)
1369 void ll_intent_drop_lock(struct lookup_intent *);
1370 void ll_intent_release(struct lookup_intent *);
1371 void ll_prune_aliases(struct inode *inode);
1372 void ll_lookup_finish_locks(struct lookup_intent *it, struct dentry *dentry);
1373 int ll_revalidate_it_finish(struct ptlrpc_request *request,
1374 struct lookup_intent *it, struct dentry *de);
1376 /* llite/llite_lib.c */
1377 extern const struct super_operations lustre_super_operations;
1379 void ll_lli_init(struct ll_inode_info *lli);
1380 int ll_fill_super(struct super_block *sb);
1381 void ll_put_super(struct super_block *sb);
1382 void ll_kill_super(struct super_block *sb);
1383 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock);
1384 void ll_dir_clear_lsm_md(struct inode *inode);
1385 void ll_clear_inode(struct inode *inode);
1386 int volatile_ref_file(const char *volatile_name, int volatile_len,
1387 struct file **ref_file);
1388 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr,
1389 enum op_xvalid xvalid, bool hsm_import);
1390 int ll_setattr(struct mnt_idmap *, struct dentry *de, struct iattr *attr);
1391 int ll_statfs(struct dentry *de, struct kstatfs *sfs);
1392 int ll_statfs_internal(struct ll_sb_info *sbi, struct obd_statfs *osfs,
1394 int ll_update_inode(struct inode *inode, struct lustre_md *md);
1395 void ll_update_inode_flags(struct inode *inode, unsigned int ext_flags);
1396 void ll_update_dir_depth_dmv(struct inode *dir, struct dentry *de);
1397 int ll_read_inode2(struct inode *inode, void *opaque);
1398 void ll_truncate_inode_pages_final(struct inode *inode);
1399 void ll_delete_inode(struct inode *inode);
1400 #ifdef HAVE_FILEATTR_GET
1401 int ll_fileattr_get(struct dentry *dentry, struct fileattr *fa);
1402 int ll_fileattr_set(struct mnt_idmap *mnt_userns,
1403 struct dentry *dentry, struct fileattr *fa);
1405 int ll_iocontrol(struct inode *inode, struct file *file,
1406 unsigned int cmd, void __user *uarg);
1407 int ll_flush_ctx(struct inode *inode);
1408 void ll_umount_begin(struct super_block *sb);
1409 int ll_remount_fs(struct super_block *sb, int *flags, char *data);
1410 int ll_show_options(struct seq_file *seq, struct dentry *dentry);
1411 void ll_dirty_page_discard_warn(struct inode *inode, int ioret);
1412 int ll_prep_inode(struct inode **inode, struct req_capsule *pill,
1413 struct super_block *sb, struct lookup_intent *it);
1414 int ll_obd_statfs(struct inode *inode, void __user *arg);
1415 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *max_mdsize);
1416 int ll_get_default_mdsize(struct ll_sb_info *sbi, int *default_mdsize);
1417 int ll_set_default_mdsize(struct ll_sb_info *sbi, int default_mdsize);
1419 void ll_unlock_md_op_lsm(struct md_op_data *op_data);
1420 struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
1421 struct inode *i1, struct inode *i2,
1422 const char *name, size_t namelen,
1423 __u32 mode, enum md_op_code opc,
1425 void ll_finish_md_op_data(struct md_op_data *op_data);
1426 int ll_get_obd_name(struct inode *inode, unsigned int cmd, void __user *arg);
1427 void ll_compute_rootsquash_state(struct ll_sb_info *sbi);
1428 ssize_t ll_copy_user_md(const struct lov_user_md __user *md,
1429 struct lov_user_md **kbuf);
1430 void ll_open_cleanup(struct super_block *sb, struct req_capsule *pill);
1432 void ll_dom_finish_open(struct inode *inode, struct ptlrpc_request *req);
1434 /* Compute expected user md size when passing in a md from user space */
1435 static inline ssize_t ll_lov_user_md_size(const struct lov_user_md *lum)
1437 switch (lum->lmm_magic) {
1438 case LOV_USER_MAGIC_V1:
1439 return sizeof(struct lov_user_md_v1);
1440 case LOV_USER_MAGIC_V3:
1441 return sizeof(struct lov_user_md_v3);
1442 case LOV_USER_MAGIC_SPECIFIC:
1443 if (lum->lmm_stripe_count > LOV_MAX_STRIPE_COUNT)
1446 return lov_user_md_size(lum->lmm_stripe_count,
1447 LOV_USER_MAGIC_SPECIFIC);
1448 case LOV_USER_MAGIC_COMP_V1:
1449 return ((struct lov_comp_md_v1 *)lum)->lcm_size;
1450 case LOV_USER_MAGIC_FOREIGN:
1451 return lov_foreign_size(lum);
1457 /* llite/llite_nfs.c */
1458 extern const struct export_operations lustre_export_operations;
1459 __u32 get_uuid2int(const char *name, int len);
1460 struct inode *search_inode_for_lustre(struct super_block *sb,
1461 const struct lu_fid *fid);
1462 int ll_dir_get_parent_fid(struct inode *dir, struct lu_fid *parent_fid);
1464 /* llite/symlink.c */
1465 extern const struct inode_operations ll_fast_symlink_inode_operations;
1468 * IO arguments for various VFS I/O interfaces.
1470 struct vvp_io_args {
1471 /** normal/sendfile/splice */
1474 struct kiocb *via_iocb;
1475 struct iov_iter *via_iter;
1480 static inline unsigned int iocb_ki_flags_get(const struct file *file,
1481 const struct kiocb *iocb)
1484 return iocb ? iocb->ki_flags : 0;
1486 return file->f_flags;
1490 static inline unsigned int vvp_io_args_flags(const struct file *file,
1491 const struct vvp_io_args *args)
1493 return iocb_ki_flags_get(file, args ? args->u.normal.via_iocb : NULL);
1501 struct ll_cl_context {
1502 struct list_head lcc_list;
1504 const struct lu_env *lcc_env;
1505 struct cl_io *lcc_io;
1506 struct cl_page *lcc_page;
1507 enum lcc_type lcc_type;
1508 pgoff_t lcc_end_index;
1511 struct ll_thread_info {
1512 struct vvp_io_args lti_args;
1513 struct ra_io_arg lti_ria;
1514 struct ll_cl_context lti_io_ctx;
1517 extern struct lu_context_key ll_thread_key;
1519 static inline struct ll_thread_info *ll_env_info(const struct lu_env *env)
1521 struct ll_thread_info *lti;
1523 lti = lu_context_key_get(&env->le_ctx, &ll_thread_key);
1524 LASSERT(lti != NULL);
1529 static inline struct vvp_io_args *ll_env_args(const struct lu_env *env)
1531 return &ll_env_info(env)->lti_args;
1534 void ll_io_init(struct cl_io *io, struct file *file, enum cl_io_type iot,
1535 struct vvp_io_args *args);
1537 /* llite/llite_mmap.c */
1539 int ll_file_mmap(struct file * file, struct vm_area_struct * vma);
1540 void policy_from_vma(union ldlm_policy_data *policy, struct vm_area_struct *vma,
1541 unsigned long addr, size_t count);
1542 struct vm_area_struct *our_vma(struct mm_struct *mm, unsigned long addr,
1545 #define ll_s2sbi(sb) (s2lsi(sb)->lsi_llsbi)
1547 /* don't need an addref as the sb_info should be holding one */
1548 static inline struct obd_export *ll_s2dtexp(struct super_block *sb)
1550 return ll_s2sbi(sb)->ll_dt_exp;
1553 /* don't need an addref as the sb_info should be holding one */
1554 static inline struct obd_export *ll_s2mdexp(struct super_block *sb)
1556 return ll_s2sbi(sb)->ll_md_exp;
1559 static inline struct client_obd *sbi2mdc(struct ll_sb_info *sbi)
1561 struct obd_device *obd = sbi->ll_md_exp->exp_obd;
1567 // FIXME: replace the name of this with LL_SB to conform to kernel stuff
1568 static inline struct ll_sb_info *ll_i2sbi(struct inode *inode)
1570 return ll_s2sbi(inode->i_sb);
1573 static inline struct obd_export *ll_i2dtexp(struct inode *inode)
1575 return ll_s2dtexp(inode->i_sb);
1578 static inline struct obd_export *ll_i2mdexp(struct inode *inode)
1580 return ll_s2mdexp(inode->i_sb);
1583 static inline struct lu_fid *ll_inode2fid(struct inode *inode)
1587 LASSERT(inode != NULL);
1588 fid = &ll_i2info(inode)->lli_fid;
1593 static inline bool ll_dir_striped(struct inode *inode)
1598 if (!S_ISDIR(inode->i_mode))
1601 down_read(&ll_i2info(inode)->lli_lsm_sem);
1602 rc = !!(ll_i2info(inode)->lli_lsm_obj &&
1603 lmv_dir_striped(ll_i2info(inode)->lli_lsm_obj));
1604 up_read(&ll_i2info(inode)->lli_lsm_sem);
1609 static inline loff_t ll_file_maxbytes(struct inode *inode)
1611 struct cl_object *obj = ll_i2info(inode)->lli_clob;
1614 return MAX_LFS_FILESIZE;
1616 return min_t(loff_t, cl_object_maxbytes(obj), MAX_LFS_FILESIZE);
1620 extern const struct xattr_handler *ll_xattr_handlers[];
1622 #define XATTR_USER_T 1
1623 #define XATTR_TRUSTED_T 2
1624 #define XATTR_SECURITY_T 3
1625 #define XATTR_ACL_ACCESS_T 4
1626 #define XATTR_ACL_DEFAULT_T 5
1627 #define XATTR_LUSTRE_T 6
1628 #define XATTR_OTHER_T 7
1629 #define XATTR_ENCRYPTION_T 9
1631 ssize_t ll_listxattr(struct dentry *dentry, char *buffer, size_t size);
1632 int ll_xattr_list(struct inode *inode, const char *name, int type,
1633 void *buffer, size_t size, u64 valid);
1634 const struct xattr_handler *get_xattr_type(const char *name);
1637 * Common IO arguments for various VFS I/O interfaces.
1639 int cl_sb_init(struct super_block *sb);
1640 int cl_sb_fini(struct super_block *sb);
1642 enum ras_update_flags {
1646 void ll_ra_count_put(struct ll_sb_info *sbi, unsigned long len);
1647 void ll_ra_stats_inc(struct inode *inode, enum ra_stat which);
1651 #define LL_SA_RPC_MIN 8
1652 #define LL_SA_RPC_DEF 128
1653 #define LL_SA_RPC_MAX 2048
1655 /* XXX: If want to support more concurrent statahead instances,
1656 * please consider to decentralize the RPC lists attached
1657 * on related import, such as imp_{sending,delayed}_list.
1659 #define LL_SA_RUNNING_MAX 256
1660 #define LL_SA_RUNNING_DEF 16
1662 #define LL_SA_BATCH_MAX 1024
1663 #define LL_SA_BATCH_DEF 64
1665 #define LL_SA_CACHE_BIT 6
1666 #define LL_SA_CACHE_SIZE (1 << LL_SA_CACHE_BIT)
1667 #define LL_SA_CACHE_MASK (LL_SA_CACHE_SIZE - 1)
1669 /* statahead controller, per process struct, for dir only */
1670 struct ll_statahead_info {
1671 struct dentry *sai_dentry;
1672 atomic_t sai_refcount; /* when access this struct, hold
1674 unsigned int sai_max; /* max ahead of lookup */
1675 __u64 sai_sent; /* stat requests sent count */
1676 __u64 sai_replied; /* stat requests which received
1678 __u64 sai_index; /* index of statahead entry */
1679 __u64 sai_index_wait; /* index of entry which is the
1680 * caller is waiting for */
1681 __u64 sai_hit; /* hit count */
1682 __u64 sai_miss; /* miss count:
1683 * for "ls -al" case, includes
1684 * hidden dentry miss;
1685 * for "ls -l" case, it does not
1686 * include hidden dentry miss.
1687 * "sai_miss_hidden" is used for
1690 unsigned int sai_consecutive_miss; /* consecutive miss */
1691 unsigned int sai_miss_hidden;/* "ls -al", but first dentry
1692 * is not a hidden one */
1693 unsigned int sai_skip_hidden;/* skipped hidden dentry count
1695 unsigned int sai_ls_all:1; /* "ls -al", do stat-ahead for
1697 wait_queue_head_t sai_waitq; /* stat-ahead wait queue */
1698 struct task_struct *sai_task; /* stat-ahead thread */
1699 struct task_struct *sai_agl_task; /* AGL thread */
1700 struct list_head sai_entries; /* completed entries */
1701 struct list_head sai_agls; /* AGLs to be sent */
1702 atomic_t sai_cache_count; /* entry count in cache */
1703 struct lu_batch *sai_bh;
1704 __u32 sai_max_batch_count;
1705 __u64 sai_index_end;
1709 char sai_fname[NAME_MAX];
1712 /* Per inode statahead information */
1713 struct ll_statahead_context {
1714 struct inode *sax_inode;
1715 atomic_t sax_refcount;
1717 struct list_head sax_cache[LL_SA_CACHE_SIZE];
1718 spinlock_t sax_cache_lock[LL_SA_CACHE_SIZE];
1721 int ll_revalidate_statahead(struct inode *dir, struct dentry **dentry,
1723 int ll_start_statahead(struct inode *dir, struct dentry *dentry, bool agl);
1724 void ll_authorize_statahead(struct inode *dir, void *key);
1725 void ll_deauthorize_statahead(struct inode *dir, void *key);
1728 blkcnt_t dirty_cnt(struct inode *inode);
1730 int cl_glimpse_size0(struct inode *inode, int agl);
1731 int cl_glimpse_lock(const struct lu_env *env, struct cl_io *io,
1732 struct inode *inode, struct cl_object *clob, int agl);
1734 static inline int cl_glimpse_size(struct inode *inode)
1736 return cl_glimpse_size0(inode, 0);
1739 /* AGL is 'asychronous glimpse lock', which is a speculative lock taken as
1740 * part of statahead */
1741 static inline int cl_agl(struct inode *inode)
1743 return cl_glimpse_size0(inode, 1);
1746 int ll_file_lock_ahead(struct file *file, struct llapi_lu_ladvise *ladvise);
1748 int cl_io_get(struct inode *inode, struct lu_env **envout,
1749 struct cl_io **ioout, __u16 *refcheck);
1751 static inline int ll_glimpse_size(struct inode *inode)
1753 struct ll_inode_info *lli = ll_i2info(inode);
1756 down_read(&lli->lli_glimpse_sem);
1757 rc = cl_glimpse_size(inode);
1758 lli->lli_glimpse_time = ktime_get();
1759 up_read(&lli->lli_glimpse_sem);
1763 /* dentry may statahead when statahead is enabled and current process has opened
1764 * parent directory, and this dentry hasn't accessed statahead cache before */
1766 dentry_may_statahead(struct inode *dir, struct dentry *dentry)
1768 struct ll_inode_info *lli;
1769 struct ll_dentry_data *ldd;
1771 if (ll_i2sbi(dir)->ll_sa_max == 0)
1774 lli = ll_i2info(dir);
1776 /* statahead is not allowed for this dir, there may be three causes:
1777 * 1. dir is not opened.
1778 * 2. statahead hit ratio is too low.
1779 * 3. previous stat started statahead thread failed. */
1780 if (!lli->lli_sa_enabled)
1784 * When stating a dentry, kernel may trigger 'revalidate' or 'lookup'
1785 * multiple times, eg. for 'getattr', 'getxattr' and etc.
1786 * For patchless client, lookup intent is not accurate, which may
1787 * misguide statahead. For example:
1788 * The 'revalidate' call for 'getattr' and 'getxattr' of a dentry will
1789 * have the same intent -- IT_GETATTR, while one dentry should access
1790 * statahead cache once, otherwise statahead windows is messed up.
1791 * The solution is as following:
1792 * Assign 'lld_sa_generation' with 'lli_sa_generation' when a dentry
1793 * IT_GETATTR for the first time, and subsequent IT_GETATTR will
1794 * bypass interacting with statahead cache by checking
1795 * 'lld_sa_generation == lli->lli_sa_generation'.
1797 ldd = ll_d2d(dentry);
1798 if (ldd != NULL && lli->lli_sa_generation &&
1799 ldd->lld_sa_generation == lli->lli_sa_generation)
1802 if (lli->lli_sa_pattern == LSA_PATTERN_FNAME)
1805 /* not the same process, don't statahead */
1806 if (lli->lli_opendir_pid != current->pid)
1812 int cl_sync_file_range(struct inode *inode, loff_t start, loff_t end,
1813 enum cl_fsync_mode mode, int ignore_layout);
1815 static inline int ll_file_nolock(const struct file *file)
1817 struct ll_file_data *fd = file->private_data;
1818 struct inode *inode = file_inode((struct file *)file);
1820 LASSERT(fd != NULL);
1821 return ((fd->fd_flags & LL_FILE_IGNORE_LOCK) ||
1822 test_bit(LL_SBI_NOLCK, ll_i2sbi(inode)->ll_flags));
1825 static inline void ll_set_lock_data(struct obd_export *exp, struct inode *inode,
1826 struct lookup_intent *it, __u64 *bits)
1828 if (!it->it_lock_set) {
1829 struct lustre_handle handle;
1831 /* If this inode is a remote object, it will get two
1832 * separate locks in different namespaces, Master MDT,
1833 * where the name entry is, will grant LOOKUP lock,
1834 * remote MDT, where the object is, will grant
1835 * UPDATE|PERM lock. The inode will be attched to both
1836 * LOOKUP and PERM locks, so revoking either locks will
1837 * case the dcache being cleared */
1838 if (it->it_remote_lock_mode) {
1839 handle.cookie = it->it_remote_lock_handle;
1840 CDEBUG(D_DLMTRACE, "setting l_data to inode "DFID
1841 "(%p) for remote lock %#llx\n",
1842 PFID(ll_inode2fid(inode)), inode,
1844 md_set_lock_data(exp, &handle, inode, NULL);
1847 handle.cookie = it->it_lock_handle;
1849 CDEBUG(D_DLMTRACE, "setting l_data to inode "DFID"(%p)"
1850 " for lock %#llx\n",
1851 PFID(ll_inode2fid(inode)), inode, handle.cookie);
1853 md_set_lock_data(exp, &handle, inode, &it->it_lock_bits);
1854 it->it_lock_set = 1;
1858 *bits = it->it_lock_bits;
1861 static inline int d_lustre_invalid(const struct dentry *dentry)
1863 return !ll_d2d(dentry) || ll_d2d(dentry)->lld_invalid;
1867 * Mark dentry INVALID, if dentry refcount is zero (this is normally case for
1868 * ll_md_blocking_ast), it will be pruned by ll_prune_aliases() and
1869 * ll_prune_negative_children(); otherwise dput() of the last refcount will
1870 * unhash this dentry and kill it.
1872 static inline void d_lustre_invalidate(struct dentry *dentry)
1874 CDEBUG(D_DENTRY, "invalidate dentry %pd (%p) parent %p inode %p refc %d\n",
1876 dentry->d_parent, dentry->d_inode, ll_d_count(dentry));
1878 spin_lock(&dentry->d_lock);
1879 if (lld_is_init(dentry))
1880 ll_d2d(dentry)->lld_invalid = 1;
1881 spin_unlock(&dentry->d_lock);
1884 static inline void d_lustre_revalidate(struct dentry *dentry)
1886 spin_lock(&dentry->d_lock);
1887 LASSERT(ll_d2d(dentry));
1888 ll_d2d(dentry)->lld_invalid = 0;
1889 spin_unlock(&dentry->d_lock);
1892 static inline dev_t ll_compat_encode_dev(dev_t dev)
1894 /* The compat_sys_*stat*() syscalls will fail unless the
1895 * device majors and minors are both less than 256. Note that
1896 * the value returned here will be passed through
1897 * old_encode_dev() in cp_compat_stat(). And so we are not
1898 * trying to return a valid compat (u16) device number, just
1899 * one that will pass the old_valid_dev() check. */
1901 return MKDEV(MAJOR(dev) & 0xff, MINOR(dev) & 0xff);
1904 int ll_layout_conf(struct inode *inode, const struct cl_object_conf *conf);
1905 int ll_layout_refresh(struct inode *inode, __u32 *gen);
1906 int ll_layout_restore(struct inode *inode, loff_t start, __u64 length);
1907 int ll_layout_write_intent(struct inode *inode, enum layout_intent_opc opc,
1908 struct lu_extent *ext);
1910 int ll_xattr_init(void);
1911 void ll_xattr_fini(void);
1913 int ll_page_sync_io(const struct lu_env *env, struct cl_io *io,
1914 struct cl_page *page, enum cl_req_type crt);
1916 int ll_getparent(struct file *file, struct getparent __user *arg);
1919 int cl_setattr_ost(struct cl_object *obj, const struct iattr *attr,
1920 enum op_xvalid xvalid, unsigned int attr_flags);
1922 extern struct lu_env *cl_inode_fini_env;
1923 extern __u16 cl_inode_fini_refcheck;
1925 int cl_file_inode_init(struct inode *inode, struct lustre_md *md);
1926 void cl_inode_fini(struct inode *inode);
1928 u64 cl_fid_build_ino(const struct lu_fid *fid, int api32);
1929 u32 cl_fid_build_gen(const struct lu_fid *fid);
1931 static inline struct pcc_super *ll_i2pccs(struct inode *inode)
1933 return &ll_i2sbi(inode)->ll_pcc_super;
1936 static inline struct pcc_super *ll_info2pccs(struct ll_inode_info *lli)
1938 return ll_i2pccs(ll_info2i(lli));
1942 /* The digested form is made of a FID (16 bytes) followed by the second-to-last
1943 * ciphertext block (16 bytes), so a total length of 32 bytes.
1944 * That way, llcrypt does not compute a digested form of this digest.
1946 struct ll_digest_filename {
1947 struct lu_fid ldf_fid;
1948 char ldf_excerpt[LL_CRYPTO_BLOCK_SIZE];
1951 int ll_prepare_lookup(struct inode *dir, struct dentry *de,
1952 struct llcrypt_name *fname, struct lu_fid *fid);
1953 int ll_setup_filename(struct inode *dir, const struct qstr *iname,
1954 int lookup, struct llcrypt_name *fname,
1955 struct lu_fid *fid);
1956 int ll_fname_disk_to_usr(struct inode *inode,
1957 u32 hash, u32 minor_hash,
1958 struct llcrypt_str *iname, struct llcrypt_str *oname,
1959 struct lu_fid *fid);
1960 int ll_file_open_encrypt(struct inode *inode, struct file *filp);
1962 static inline char *xattr_for_enc(struct inode *inode)
1964 if (ll_sbi_has_name_encrypt(ll_i2sbi(inode)))
1965 return LL_XATTR_NAME_ENCRYPTION_CONTEXT;
1967 return LL_XATTR_NAME_ENCRYPTION_CONTEXT_OLD;
1970 #ifdef HAVE_LUSTRE_CRYPTO
1971 extern const struct llcrypt_operations lustre_cryptops;
1974 /* llite/llite_foreign.c */
1975 int ll_manage_foreign(struct inode *inode, struct lustre_md *lmd);
1976 bool ll_foreign_is_openable(struct dentry *dentry, unsigned int flags);
1977 bool ll_foreign_is_removable(struct dentry *dentry, bool unset);
1979 int ll_filemap_fault(struct vm_area_struct *vma, struct vm_fault *vmf);
1981 #endif /* LLITE_INTERNAL_H */