4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2015, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
37 #ifndef LLITE_INTERNAL_H
38 #define LLITE_INTERNAL_H
39 #include "../include/lustre_debug.h"
40 #include "../include/lustre_ver.h"
41 #include "../include/lustre_disk.h" /* for s2sbi */
42 #include "../include/lustre_eacl.h"
44 /* for struct cl_lock_descr and struct cl_io */
45 #include "../include/cl_object.h"
46 #include "../include/lclient.h"
47 #include "../include/lustre_mdc.h"
48 #include "../include/lustre_intent.h"
49 #include <linux/compat.h>
50 #include <linux/posix_acl_xattr.h>
56 #ifndef VM_FAULT_RETRY
57 #define VM_FAULT_RETRY 0
60 /** Only used on client-side for indicating the tail of dir hash/offset. */
61 #define LL_DIR_END_OFF 0x7fffffffffffffffULL
62 #define LL_DIR_END_OFF_32BIT 0x7fffffffUL
64 #define LL_IT2STR(it) ((it) ? ldlm_it2str((it)->it_op) : "0")
65 #define LUSTRE_FPRIVATE(file) ((file)->private_data)
67 struct ll_dentry_data
{
68 struct lookup_intent
*lld_it
;
69 unsigned int lld_sa_generation
;
70 unsigned int lld_invalid
:1;
71 struct rcu_head lld_rcu_head
;
74 #define ll_d2d(de) ((struct ll_dentry_data *)((de)->d_fsdata))
76 #define LLI_INODE_MAGIC 0x111d0de5
77 #define LLI_INODE_DEAD 0xdeadd00d
79 /* remote client permission cache */
80 #define REMOTE_PERM_HASHSIZE 16
82 struct ll_getname_data
{
83 struct dir_context ctx
;
84 char *lgd_name
; /* points to a buffer with NAME_MAX+1 size */
85 struct lu_fid lgd_fid
; /* target fid we are looking for */
86 int lgd_found
; /* inode matched? */
89 /* llite setxid/access permission for user on remote client */
90 struct ll_remote_perm
{
91 struct hlist_node lrp_list
;
96 int lrp_access_perm
; /* MAY_READ/WRITE/EXEC, this
97 * is access permission with
98 * lrp_fsuid/lrp_fsgid.
103 /* MDS has an authority for the Size-on-MDS attributes. */
104 LLIF_MDS_SIZE_LOCK
= (1 << 0),
105 /* Epoch close is postponed. */
106 LLIF_EPOCH_PENDING
= (1 << 1),
107 /* DONE WRITING is allowed. */
108 LLIF_DONE_WRITING
= (1 << 2),
109 /* Sizeon-on-MDS attributes are changed. An attribute update needs to
112 LLIF_SOM_DIRTY
= (1 << 3),
113 /* File data is modified. */
114 LLIF_DATA_MODIFIED
= (1 << 4),
115 /* File is being restored */
116 LLIF_FILE_RESTORING
= (1 << 5),
117 /* Xattr cache is attached to the file */
118 LLIF_XATTR_CACHE
= (1 << 6),
121 struct ll_inode_info
{
122 __u32 lli_inode_magic
;
127 struct posix_acl
*lli_posix_acl
;
129 struct hlist_head
*lli_remote_perms
;
130 struct mutex lli_rmtperm_mutex
;
132 /* identifying fields for both metadata and data stacks. */
133 struct lu_fid lli_fid
;
134 /* Parent fid for accessing default stripe data on parent directory
135 * for allocating OST objects after a mknod() and later open-by-FID.
137 struct lu_fid lli_pfid
;
139 struct list_head lli_close_list
;
141 unsigned long lli_rmtperm_time
;
143 /* handle is to be sent to MDS later on done_writing and setattr.
144 * Open handle data are needed for the recovery to reconstruct
145 * the inode state on the MDS. XXX: recovery is not ready yet.
147 struct obd_client_handle
*lli_pending_och
;
149 /* We need all three because every inode may be opened in different
152 struct obd_client_handle
*lli_mds_read_och
;
153 struct obd_client_handle
*lli_mds_write_och
;
154 struct obd_client_handle
*lli_mds_exec_och
;
155 __u64 lli_open_fd_read_count
;
156 __u64 lli_open_fd_write_count
;
157 __u64 lli_open_fd_exec_count
;
158 /* Protects access to och pointers and their usage counters */
159 struct mutex lli_och_mutex
;
161 struct inode lli_vfs_inode
;
163 /* the most recent timestamps obtained from mds */
164 struct ost_lvb lli_lvb
;
165 spinlock_t lli_agl_lock
;
167 /* Try to make the d::member and f::member are aligned. Before using
168 * these members, make clear whether it is directory or not.
173 /* serialize normal readdir and statahead-readdir. */
174 struct mutex d_readdir_mutex
;
176 /* metadata statahead */
177 /* since parent-child threads can share the same @file
178 * struct, "opendir_key" is the token when dir close for
179 * case of parent exit before child -- it is me should
180 * cleanup the dir readahead.
183 struct ll_statahead_info
*d_sai
;
184 /* protect statahead stuff. */
185 spinlock_t d_sa_lock
;
186 /* "opendir_pid" is the token when lookup/revalidate
187 * -- I am the owner of dir statahead.
192 #define lli_readdir_mutex u.d.d_readdir_mutex
193 #define lli_opendir_key u.d.d_opendir_key
194 #define lli_sai u.d.d_sai
195 #define lli_sa_lock u.d.d_sa_lock
196 #define lli_opendir_pid u.d.d_opendir_pid
198 /* for non-directory */
200 struct mutex f_size_mutex
;
201 char *f_symlink_name
;
204 * struct rw_semaphore {
205 * signed long count; // align d.d_def_acl
206 * spinlock_t wait_lock; // align d.d_sa_lock
207 * struct list_head wait_list;
210 struct rw_semaphore f_trunc_sem
;
211 struct mutex f_write_mutex
;
213 struct rw_semaphore f_glimpse_sem
;
214 unsigned long f_glimpse_time
;
215 struct list_head f_agl_list
;
218 /* for writepage() only to communicate to fsync */
222 * whenever a process try to read/write the file, the
223 * jobid of the process will be saved here, and it'll
224 * be packed into the write PRC when flush later.
226 * so the read/write statistics for jobid will not be
227 * accurate if the file is shared by different jobs.
229 char f_jobid
[JOBSTATS_JOBID_SIZE
];
232 #define lli_size_mutex u.f.f_size_mutex
233 #define lli_symlink_name u.f.f_symlink_name
234 #define lli_maxbytes u.f.f_maxbytes
235 #define lli_trunc_sem u.f.f_trunc_sem
236 #define lli_write_mutex u.f.f_write_mutex
237 #define lli_glimpse_sem u.f.f_glimpse_sem
238 #define lli_glimpse_time u.f.f_glimpse_time
239 #define lli_agl_list u.f.f_agl_list
240 #define lli_agl_index u.f.f_agl_index
241 #define lli_async_rc u.f.f_async_rc
242 #define lli_jobid u.f.f_jobid
246 /* XXX: For following frequent used members, although they maybe special
247 * used for non-directory object, it is some time-wasting to check
248 * whether the object is directory or not before using them. On the
249 * other hand, currently, sizeof(f) > sizeof(d), it cannot reduce
250 * the "ll_inode_info" size even if moving those members into u.f.
251 * So keep them out side.
253 * In the future, if more members are added only for directory,
254 * some of the following members can be moved into u.f.
257 struct cl_object
*lli_clob
;
259 /* mutex to request for layout lock exclusively. */
260 struct mutex lli_layout_mutex
;
261 /* Layout version, protected by lli_layout_lock */
262 __u32 lli_layout_gen
;
263 spinlock_t lli_layout_lock
;
265 struct rw_semaphore lli_xattrs_list_rwsem
;
266 struct mutex lli_xattrs_enq_lock
;
267 struct list_head lli_xattrs
;/* ll_xattr_entry->xe_list */
270 static inline __u32
ll_layout_version_get(struct ll_inode_info
*lli
)
274 spin_lock(&lli
->lli_layout_lock
);
275 gen
= lli
->lli_layout_gen
;
276 spin_unlock(&lli
->lli_layout_lock
);
281 static inline void ll_layout_version_set(struct ll_inode_info
*lli
, __u32 gen
)
283 spin_lock(&lli
->lli_layout_lock
);
284 lli
->lli_layout_gen
= gen
;
285 spin_unlock(&lli
->lli_layout_lock
);
288 int ll_xattr_cache_destroy(struct inode
*inode
);
290 int ll_xattr_cache_get(struct inode
*inode
, const char *name
,
291 char *buffer
, size_t size
, __u64 valid
);
294 * Locking to guarantee consistency of non-atomic updates to long long i_size,
295 * consistency between file size and KMS.
297 * Implemented by ->lli_size_mutex and ->lsm_lock, nested in that order.
300 void ll_inode_size_lock(struct inode
*inode
);
301 void ll_inode_size_unlock(struct inode
*inode
);
303 /* FIXME: replace the name of this with LL_I to conform to kernel stuff */
304 /* static inline struct ll_inode_info *LL_I(struct inode *inode) */
305 static inline struct ll_inode_info
*ll_i2info(struct inode
*inode
)
307 return container_of(inode
, struct ll_inode_info
, lli_vfs_inode
);
310 /* default to about 40meg of readahead on a given system. That much tied
311 * up in 512k readahead requests serviced at 40ms each is about 1GB/s.
313 #define SBI_DEFAULT_READAHEAD_MAX (40UL << (20 - PAGE_SHIFT))
315 /* default to read-ahead full files smaller than 2MB on the second read */
316 #define SBI_DEFAULT_READAHEAD_WHOLE_MAX (2UL << (20 - PAGE_SHIFT))
321 RA_STAT_DISTANT_READPAGE
,
322 RA_STAT_MISS_IN_WINDOW
,
323 RA_STAT_FAILED_GRAB_PAGE
,
324 RA_STAT_FAILED_MATCH
,
329 RA_STAT_MAX_IN_FLIGHT
,
330 RA_STAT_WRONG_GRAB_PAGE
,
335 atomic_t ra_cur_pages
;
336 unsigned long ra_max_pages
;
337 unsigned long ra_max_pages_per_file
;
338 unsigned long ra_max_read_ahead_whole_pages
;
341 /* ra_io_arg will be filled in the beginning of ll_readahead with
342 * ras_lock, then the following ll_read_ahead_pages will read RA
343 * pages according to this arg, all the items in this structure are
344 * counted by page index.
347 unsigned long ria_start
; /* start offset of read-ahead*/
348 unsigned long ria_end
; /* end offset of read-ahead*/
349 /* If stride read pattern is detected, ria_stoff means where
350 * stride read is started. Note: for normal read-ahead, the
351 * value here is meaningless, and also it will not be accessed
354 /* ria_length and ria_pages are the length and pages length in the
355 * stride I/O mode. And they will also be used to check whether
356 * it is stride I/O read-ahead in the read-ahead pages
358 unsigned long ria_length
;
359 unsigned long ria_pages
;
362 /* LL_HIST_MAX=32 causes an overflow */
363 #define LL_HIST_MAX 28
364 #define LL_HIST_START 12 /* buckets start at 2^12 = 4k */
365 #define LL_PROCESS_HIST_MAX 10
366 struct per_process_info
{
368 struct obd_histogram pp_r_hist
;
369 struct obd_histogram pp_w_hist
;
372 /* pp_extents[LL_PROCESS_HIST_MAX] will hold the combined process info */
373 struct ll_rw_extents_info
{
374 struct per_process_info pp_extents
[LL_PROCESS_HIST_MAX
+ 1];
377 #define LL_OFFSET_HIST_MAX 100
378 struct ll_rw_process_info
{
381 loff_t rw_range_start
;
383 loff_t rw_last_file_pos
;
385 size_t rw_smallest_extent
;
386 size_t rw_largest_extent
;
387 struct ll_file_data
*rw_last_file
;
390 enum stats_track_type
{
391 STATS_TRACK_ALL
= 0, /* track all processes */
392 STATS_TRACK_PID
, /* track process with this pid */
393 STATS_TRACK_PPID
, /* track processes with this ppid */
394 STATS_TRACK_GID
, /* track processes with this gid */
398 /* flags for sbi->ll_flags */
399 #define LL_SBI_NOLCK 0x01 /* DLM locking disabled (directio-only) */
400 #define LL_SBI_CHECKSUM 0x02 /* checksum each page as it's written */
401 #define LL_SBI_FLOCK 0x04
402 #define LL_SBI_USER_XATTR 0x08 /* support user xattr */
403 #define LL_SBI_ACL 0x10 /* support ACL */
404 #define LL_SBI_RMT_CLIENT 0x40 /* remote client */
405 #define LL_SBI_MDS_CAPA 0x80 /* support mds capa, obsolete */
406 #define LL_SBI_OSS_CAPA 0x100 /* support oss capa, obsolete */
407 #define LL_SBI_LOCALFLOCK 0x200 /* Local flocks support by kernel */
408 #define LL_SBI_LRU_RESIZE 0x400 /* lru resize support */
409 #define LL_SBI_LAZYSTATFS 0x800 /* lazystatfs mount option */
410 #define LL_SBI_SOM_PREVIEW 0x1000 /* SOM preview mount option */
411 #define LL_SBI_32BIT_API 0x2000 /* generate 32 bit inodes. */
412 #define LL_SBI_64BIT_HASH 0x4000 /* support 64-bits dir hash/offset */
413 #define LL_SBI_AGL_ENABLED 0x8000 /* enable agl */
414 #define LL_SBI_VERBOSE 0x10000 /* verbose mount/umount */
415 #define LL_SBI_LAYOUT_LOCK 0x20000 /* layout lock support */
416 #define LL_SBI_USER_FID2PATH 0x40000 /* allow fid2path by unprivileged users */
417 #define LL_SBI_XATTR_CACHE 0x80000 /* support for xattr cache */
419 #define LL_SBI_FLAGS { \
442 #define RCE_HASHES 32
444 struct rmtacl_ctl_entry
{
445 struct list_head rce_list
;
446 pid_t rce_key
; /* hash key */
447 int rce_ops
; /* acl operation type */
450 struct rmtacl_ctl_table
{
452 struct list_head rct_entries
[RCE_HASHES
];
459 struct list_head et_entries
[EE_HASHES
];
463 /* this protects pglist and ra_info. It isn't safe to
464 * grab from interrupt contexts
467 spinlock_t ll_pp_extent_lock
; /* pp_extent entry*/
468 spinlock_t ll_process_lock
; /* ll_rw_process_info */
469 struct obd_uuid ll_sb_uuid
;
470 struct obd_export
*ll_md_exp
;
471 struct obd_export
*ll_dt_exp
;
472 struct dentry
*ll_debugfs_entry
;
473 struct lu_fid ll_root_fid
; /* root object fid */
476 unsigned int ll_umounting
:1,
477 ll_xattr_cache_enabled
:1;
478 struct lustre_client_ocd ll_lco
;
480 struct ll_close_queue
*ll_lcq
;
482 struct lprocfs_stats
*ll_stats
; /* lprocfs stats counter */
484 struct cl_client_cache ll_cache
;
486 struct lprocfs_stats
*ll_ra_stats
;
488 struct ll_ra_info ll_ra_info
;
489 unsigned int ll_namelen
;
490 struct file_operations
*ll_fop
;
492 unsigned int ll_md_brw_size
; /* used by readdir */
494 struct lu_site
*ll_site
;
495 struct cl_device
*ll_cl
;
497 struct ll_rw_extents_info ll_rw_extents_info
;
498 int ll_extent_process_count
;
499 struct ll_rw_process_info ll_rw_process_info
[LL_PROCESS_HIST_MAX
];
500 unsigned int ll_offset_process_count
;
501 struct ll_rw_process_info ll_rw_offset_info
[LL_OFFSET_HIST_MAX
];
502 unsigned int ll_rw_offset_entry_count
;
503 int ll_stats_track_id
;
504 enum stats_track_type ll_stats_track_type
;
507 /* metadata stat-ahead */
508 unsigned int ll_sa_max
; /* max statahead RPCs */
509 atomic_t ll_sa_total
; /* statahead thread started
512 atomic_t ll_sa_wrong
; /* statahead thread stopped for
515 atomic_t ll_agl_total
; /* AGL thread started count */
517 dev_t ll_sdev_orig
; /* save s_dev before assign for
520 struct rmtacl_ctl_table ll_rct
;
521 struct eacl_table ll_et
;
522 __kernel_fsid_t ll_fsid
;
523 struct kobject ll_kobj
; /* sysfs object */
524 struct super_block
*ll_sb
; /* struct super_block (for sysfs code)*/
525 struct completion ll_kobj_unregister
;
531 struct task_struct
*lrr_reader
;
532 struct list_head lrr_linkage
;
536 * per file-descriptor read-ahead data.
538 struct ll_readahead_state
{
541 * index of the last page that read(2) needed and that wasn't in the
542 * cache. Used by ras_update() to detect seeks.
544 * XXX nikita: if access seeks into cached region, Lustre doesn't see
547 unsigned long ras_last_readpage
;
549 * number of pages read after last read-ahead window reset. As window
550 * is reset on each seek, this is effectively a number of consecutive
551 * accesses. Maybe ->ras_accessed_in_window is better name.
553 * XXX nikita: window is also reset (by ras_update()) when Lustre
554 * believes that memory pressure evicts read-ahead pages. In that
555 * case, it probably doesn't make sense to expand window to
556 * PTLRPC_MAX_BRW_PAGES on the third access.
558 unsigned long ras_consecutive_pages
;
560 * number of read requests after the last read-ahead window reset
561 * As window is reset on each seek, this is effectively the number
562 * on consecutive read request and is used to trigger read-ahead.
564 unsigned long ras_consecutive_requests
;
566 * Parameters of current read-ahead window. Handled by
567 * ras_update(). On the initial access to the file or after a seek,
568 * window is reset to 0. After 3 consecutive accesses, window is
569 * expanded to PTLRPC_MAX_BRW_PAGES. Afterwards, window is enlarged by
570 * PTLRPC_MAX_BRW_PAGES chunks up to ->ra_max_pages.
572 unsigned long ras_window_start
, ras_window_len
;
574 * Where next read-ahead should start at. This lies within read-ahead
575 * window. Read-ahead window is read in pieces rather than at once
576 * because: 1. lustre limits total number of pages under read-ahead by
577 * ->ra_max_pages (see ll_ra_count_get()), 2. client cannot read pages
578 * not covered by DLM lock.
580 unsigned long ras_next_readahead
;
582 * Total number of ll_file_read requests issued, reads originating
583 * due to mmap are not counted in this total. This value is used to
584 * trigger full file read-ahead after multiple reads to a small file.
586 unsigned long ras_requests
;
588 * Page index with respect to the current request, these value
589 * will not be accurate when dealing with reads issued via mmap.
591 unsigned long ras_request_index
;
593 * list of struct ll_ra_read's one per read(2) call current in
594 * progress against this file descriptor. Used by read-ahead code,
595 * protected by ->ras_lock.
597 struct list_head ras_read_beads
;
599 * The following 3 items are used for detecting the stride I/O
601 * In stride I/O mode,
602 * ...............|-----data-----|****gap*****|--------|******|....
603 * offset |-stride_pages-|-stride_gap-|
604 * ras_stride_offset = offset;
605 * ras_stride_length = stride_pages + stride_gap;
606 * ras_stride_pages = stride_pages;
607 * Note: all these three items are counted by pages.
609 unsigned long ras_stride_length
;
610 unsigned long ras_stride_pages
;
611 pgoff_t ras_stride_offset
;
613 * number of consecutive stride request count, and it is similar as
614 * ras_consecutive_requests, but used for stride I/O mode.
615 * Note: only more than 2 consecutive stride request are detected,
616 * stride read-ahead will be enable
618 unsigned long ras_consecutive_stride_requests
;
621 extern struct kmem_cache
*ll_file_data_slab
;
622 struct lustre_handle
;
623 struct ll_file_data
{
624 struct ll_readahead_state fd_ras
;
625 struct ccc_grouplock fd_grouplock
;
629 /* openhandle if lease exists for this file.
630 * Borrow lli->lli_och_mutex to protect assignment
632 struct obd_client_handle
*fd_lease_och
;
633 struct obd_client_handle
*fd_och
;
634 struct file
*fd_file
;
635 /* Indicate whether need to report failure when close.
636 * true: failure is known, not report again.
637 * false: unknown failure, should report.
639 bool fd_write_failed
;
642 struct lov_stripe_md
;
644 extern struct dentry
*llite_root
;
645 extern struct kset
*llite_kset
;
647 static inline struct inode
*ll_info2i(struct ll_inode_info
*lli
)
649 return &lli
->lli_vfs_inode
;
652 __u32
ll_i2suppgid(struct inode
*i
);
653 void ll_i2gids(__u32
*suppgids
, struct inode
*i1
, struct inode
*i2
);
655 static inline int ll_need_32bit_api(struct ll_sb_info
*sbi
)
657 #if BITS_PER_LONG == 32
659 #elif defined(CONFIG_COMPAT)
660 return unlikely(in_compat_syscall() || (sbi
->ll_flags
& LL_SBI_32BIT_API
));
662 return unlikely(sbi
->ll_flags
& LL_SBI_32BIT_API
);
666 void ll_ra_read_in(struct file
*f
, struct ll_ra_read
*rar
);
667 void ll_ra_read_ex(struct file
*f
, struct ll_ra_read
*rar
);
669 /* llite/lproc_llite.c */
670 int ldebugfs_register_mountpoint(struct dentry
*parent
,
671 struct super_block
*sb
, char *osc
, char *mdc
);
672 void ldebugfs_unregister_mountpoint(struct ll_sb_info
*sbi
);
673 void ll_stats_ops_tally(struct ll_sb_info
*sbi
, int op
, int count
);
674 void lprocfs_llite_init_vars(struct lprocfs_static_vars
*lvars
);
675 void ll_rw_stats_tally(struct ll_sb_info
*sbi
, pid_t pid
,
676 struct ll_file_data
*file
, loff_t pos
,
677 size_t count
, int rw
);
680 void ll_release_page(struct page
*page
, int remove
);
681 extern const struct file_operations ll_dir_operations
;
682 extern const struct inode_operations ll_dir_inode_operations
;
683 struct page
*ll_get_dir_page(struct inode
*dir
, __u64 hash
,
684 struct ll_dir_chain
*chain
);
685 int ll_dir_read(struct inode
*inode
, struct dir_context
*ctx
);
687 int ll_get_mdt_idx(struct inode
*inode
);
689 extern const struct inode_operations ll_special_inode_operations
;
691 int ll_objects_destroy(struct ptlrpc_request
*request
,
693 struct inode
*ll_iget(struct super_block
*sb
, ino_t hash
,
694 struct lustre_md
*lic
);
695 int ll_md_blocking_ast(struct ldlm_lock
*, struct ldlm_lock_desc
*,
696 void *data
, int flag
);
697 struct dentry
*ll_splice_alias(struct inode
*inode
, struct dentry
*de
);
700 int ll_prepare_write(struct file
*, struct page
*, unsigned from
, unsigned to
);
701 int ll_commit_write(struct file
*, struct page
*, unsigned from
, unsigned to
);
702 int ll_writepage(struct page
*page
, struct writeback_control
*wbc
);
703 int ll_writepages(struct address_space
*, struct writeback_control
*wbc
);
704 int ll_readpage(struct file
*file
, struct page
*page
);
705 void ll_readahead_init(struct inode
*inode
, struct ll_readahead_state
*ras
);
706 int ll_readahead(const struct lu_env
*env
, struct cl_io
*io
,
707 struct ll_readahead_state
*ras
, struct address_space
*mapping
,
708 struct cl_page_list
*queue
, int flags
);
710 extern const struct address_space_operations ll_aops
;
713 extern struct file_operations ll_file_operations
;
714 extern struct file_operations ll_file_operations_flock
;
715 extern struct file_operations ll_file_operations_noflock
;
716 extern const struct inode_operations ll_file_inode_operations
;
717 int ll_have_md_lock(struct inode
*inode
, __u64
*bits
,
718 enum ldlm_mode l_req_mode
);
719 enum ldlm_mode
ll_take_md_lock(struct inode
*inode
, __u64 bits
,
720 struct lustre_handle
*lockh
, __u64 flags
,
721 enum ldlm_mode mode
);
722 int ll_file_open(struct inode
*inode
, struct file
*file
);
723 int ll_file_release(struct inode
*inode
, struct file
*file
);
724 int ll_glimpse_ioctl(struct ll_sb_info
*sbi
,
725 struct lov_stripe_md
*lsm
, lstat_t
*st
);
726 void ll_ioepoch_open(struct ll_inode_info
*lli
, __u64 ioepoch
);
727 int ll_release_openhandle(struct inode
*, struct lookup_intent
*);
728 int ll_md_real_close(struct inode
*inode
, fmode_t fmode
);
729 void ll_ioepoch_close(struct inode
*inode
, struct md_op_data
*op_data
,
730 struct obd_client_handle
**och
, unsigned long flags
);
731 void ll_done_writing_attr(struct inode
*inode
, struct md_op_data
*op_data
);
732 int ll_som_update(struct inode
*inode
, struct md_op_data
*op_data
);
733 int ll_inode_getattr(struct inode
*inode
, struct obdo
*obdo
,
734 __u64 ioepoch
, int sync
);
735 void ll_pack_inode2opdata(struct inode
*inode
, struct md_op_data
*op_data
,
736 struct lustre_handle
*fh
);
737 int ll_getattr(struct vfsmount
*mnt
, struct dentry
*de
, struct kstat
*stat
);
738 struct posix_acl
*ll_get_acl(struct inode
*inode
, int type
);
740 int ll_inode_permission(struct inode
*inode
, int mask
);
742 int ll_lov_setstripe_ea_info(struct inode
*inode
, struct dentry
*dentry
,
743 int flags
, struct lov_user_md
*lum
,
745 int ll_lov_getstripe_ea_info(struct inode
*inode
, const char *filename
,
746 struct lov_mds_md
**lmm
, int *lmm_size
,
747 struct ptlrpc_request
**request
);
748 int ll_dir_setstripe(struct inode
*inode
, struct lov_user_md
*lump
,
750 int ll_dir_getstripe(struct inode
*inode
, struct lov_mds_md
**lmmp
,
751 int *lmm_size
, struct ptlrpc_request
**request
);
752 int ll_fsync(struct file
*file
, loff_t start
, loff_t end
, int data
);
753 int ll_merge_lvb(const struct lu_env
*env
, struct inode
*inode
);
754 int ll_fid2path(struct inode
*inode
, void __user
*arg
);
755 int ll_data_version(struct inode
*inode
, __u64
*data_version
, int extent_lock
);
756 int ll_hsm_release(struct inode
*inode
);
760 int ll_d_init(struct dentry
*de
);
761 extern const struct dentry_operations ll_d_ops
;
762 void ll_intent_drop_lock(struct lookup_intent
*);
763 void ll_intent_release(struct lookup_intent
*);
764 void ll_invalidate_aliases(struct inode
*);
765 void ll_lookup_finish_locks(struct lookup_intent
*it
, struct inode
*inode
);
766 int ll_revalidate_it_finish(struct ptlrpc_request
*request
,
767 struct lookup_intent
*it
, struct inode
*inode
);
769 /* llite/llite_lib.c */
770 extern struct super_operations lustre_super_operations
;
772 void ll_lli_init(struct ll_inode_info
*lli
);
773 int ll_fill_super(struct super_block
*sb
, struct vfsmount
*mnt
);
774 void ll_put_super(struct super_block
*sb
);
775 void ll_kill_super(struct super_block
*sb
);
776 struct inode
*ll_inode_from_resource_lock(struct ldlm_lock
*lock
);
777 void ll_clear_inode(struct inode
*inode
);
778 int ll_setattr_raw(struct dentry
*dentry
, struct iattr
*attr
, bool hsm_import
);
779 int ll_setattr(struct dentry
*de
, struct iattr
*attr
);
780 int ll_statfs(struct dentry
*de
, struct kstatfs
*sfs
);
781 int ll_statfs_internal(struct super_block
*sb
, struct obd_statfs
*osfs
,
782 __u64 max_age
, __u32 flags
);
783 void ll_update_inode(struct inode
*inode
, struct lustre_md
*md
);
784 void ll_read_inode2(struct inode
*inode
, void *opaque
);
785 void ll_delete_inode(struct inode
*inode
);
786 int ll_iocontrol(struct inode
*inode
, struct file
*file
,
787 unsigned int cmd
, unsigned long arg
);
788 int ll_flush_ctx(struct inode
*inode
);
789 void ll_umount_begin(struct super_block
*sb
);
790 int ll_remount_fs(struct super_block
*sb
, int *flags
, char *data
);
791 int ll_show_options(struct seq_file
*seq
, struct dentry
*dentry
);
792 void ll_dirty_page_discard_warn(struct page
*page
, int ioret
);
793 int ll_prep_inode(struct inode
**inode
, struct ptlrpc_request
*req
,
794 struct super_block
*, struct lookup_intent
*);
795 int ll_obd_statfs(struct inode
*inode
, void __user
*arg
);
796 int ll_get_max_mdsize(struct ll_sb_info
*sbi
, int *max_mdsize
);
797 int ll_get_default_mdsize(struct ll_sb_info
*sbi
, int *default_mdsize
);
798 int ll_process_config(struct lustre_cfg
*lcfg
);
799 struct md_op_data
*ll_prep_md_op_data(struct md_op_data
*op_data
,
800 struct inode
*i1
, struct inode
*i2
,
801 const char *name
, int namelen
,
802 int mode
, __u32 opc
, void *data
);
803 void ll_finish_md_op_data(struct md_op_data
*op_data
);
804 int ll_get_obd_name(struct inode
*inode
, unsigned int cmd
, unsigned long arg
);
805 char *ll_get_fsname(struct super_block
*sb
, char *buf
, int buflen
);
806 void ll_open_cleanup(struct super_block
*sb
, struct ptlrpc_request
*open_req
);
808 /* llite/llite_nfs.c */
809 extern const struct export_operations lustre_export_operations
;
810 __u32
get_uuid2int(const char *name
, int len
);
811 void get_uuid2fsid(const char *name
, int len
, __kernel_fsid_t
*fsid
);
812 struct inode
*search_inode_for_lustre(struct super_block
*sb
,
813 const struct lu_fid
*fid
);
815 /* llite/symlink.c */
816 extern const struct inode_operations ll_fast_symlink_inode_operations
;
818 /* llite/llite_close.c */
819 struct ll_close_queue
{
821 struct list_head lcq_head
;
822 wait_queue_head_t lcq_waitq
;
823 struct completion lcq_comp
;
827 struct ccc_object
*cl_inode2ccc(struct inode
*inode
);
829 void vvp_write_pending (struct ccc_object
*club
, struct ccc_page
*page
);
830 void vvp_write_complete(struct ccc_object
*club
, struct ccc_page
*page
);
832 /* specific architecture can implement only part of this list */
833 enum vvp_io_subtype
{
836 /** io started from splice_{read|write} */
843 enum vvp_io_subtype cui_io_subtype
;
847 struct pipe_inode_info
*cui_pipe
;
848 unsigned int cui_flags
;
850 struct vvp_fault_io
{
852 * Inode modification time that is checked across DLM
856 struct vm_area_struct
*ft_vma
;
858 * locked page returned from vvp_io
860 struct page
*ft_vmpage
;
861 struct vm_fault_api
{
865 struct vm_fault
*ft_vmf
;
867 * fault API used bitflags for return code.
869 unsigned int ft_flags
;
871 * check that flags are from filemap_fault
878 * Read-ahead state used by read and page-fault IO contexts.
880 struct ll_ra_read cui_bead
;
882 * Set when cui_bead has been initialized.
884 int cui_ra_window_set
;
888 * IO arguments for various VFS I/O interfaces.
892 enum vvp_io_subtype via_io_subtype
;
896 struct kiocb
*via_iocb
;
897 struct iov_iter
*via_iter
;
900 struct pipe_inode_info
*via_pipe
;
901 unsigned int via_flags
;
906 struct ll_cl_context
{
908 struct cl_io
*lcc_io
;
909 struct cl_page
*lcc_page
;
910 struct lu_env
*lcc_env
;
914 struct vvp_thread_info
{
915 struct vvp_io_args vti_args
;
916 struct ra_io_arg vti_ria
;
917 struct ll_cl_context vti_io_ctx
;
920 static inline struct vvp_thread_info
*vvp_env_info(const struct lu_env
*env
)
922 extern struct lu_context_key vvp_key
;
923 struct vvp_thread_info
*info
;
925 info
= lu_context_key_get(&env
->le_ctx
, &vvp_key
);
930 static inline struct vvp_io_args
*vvp_env_args(const struct lu_env
*env
,
931 enum vvp_io_subtype type
)
933 struct vvp_io_args
*ret
= &vvp_env_info(env
)->vti_args
;
935 ret
->via_io_subtype
= type
;
941 struct vvp_io vs_ios
;
944 static inline struct vvp_session
*vvp_env_session(const struct lu_env
*env
)
946 extern struct lu_context_key vvp_session_key
;
947 struct vvp_session
*ses
;
949 ses
= lu_context_key_get(env
->le_ses
, &vvp_session_key
);
954 static inline struct vvp_io
*vvp_env_io(const struct lu_env
*env
)
956 return &vvp_env_session(env
)->vs_ios
;
959 int vvp_global_init(void);
960 void vvp_global_fini(void);
962 void ll_queue_done_writing(struct inode
*inode
, unsigned long flags
);
963 void ll_close_thread_shutdown(struct ll_close_queue
*lcq
);
964 int ll_close_thread_start(struct ll_close_queue
**lcq_ret
);
966 /* llite/llite_mmap.c */
968 int ll_teardown_mmaps(struct address_space
*mapping
, __u64 first
, __u64 last
);
969 int ll_file_mmap(struct file
*file
, struct vm_area_struct
*vma
);
970 void policy_from_vma(ldlm_policy_data_t
*policy
, struct vm_area_struct
*vma
,
971 unsigned long addr
, size_t count
);
972 struct vm_area_struct
*our_vma(struct mm_struct
*mm
, unsigned long addr
,
975 static inline void ll_invalidate_page(struct page
*vmpage
)
977 struct address_space
*mapping
= vmpage
->mapping
;
978 loff_t offset
= vmpage
->index
<< PAGE_SHIFT
;
980 LASSERT(PageLocked(vmpage
));
984 ll_teardown_mmaps(mapping
, offset
, offset
+ PAGE_SIZE
);
985 truncate_complete_page(mapping
, vmpage
);
988 #define ll_s2sbi(sb) (s2lsi(sb)->lsi_llsbi)
990 /* don't need an addref as the sb_info should be holding one */
991 static inline struct obd_export
*ll_s2dtexp(struct super_block
*sb
)
993 return ll_s2sbi(sb
)->ll_dt_exp
;
996 /* don't need an addref as the sb_info should be holding one */
997 static inline struct obd_export
*ll_s2mdexp(struct super_block
*sb
)
999 return ll_s2sbi(sb
)->ll_md_exp
;
1002 static inline struct client_obd
*sbi2mdc(struct ll_sb_info
*sbi
)
1004 struct obd_device
*obd
= sbi
->ll_md_exp
->exp_obd
;
1011 /* FIXME: replace the name of this with LL_SB to conform to kernel stuff */
1012 static inline struct ll_sb_info
*ll_i2sbi(struct inode
*inode
)
1014 return ll_s2sbi(inode
->i_sb
);
1017 static inline struct obd_export
*ll_i2dtexp(struct inode
*inode
)
1019 return ll_s2dtexp(inode
->i_sb
);
1022 static inline struct obd_export
*ll_i2mdexp(struct inode
*inode
)
1024 return ll_s2mdexp(inode
->i_sb
);
1027 static inline struct lu_fid
*ll_inode2fid(struct inode
*inode
)
1032 fid
= &ll_i2info(inode
)->lli_fid
;
1037 static inline __u64
ll_file_maxbytes(struct inode
*inode
)
1039 return ll_i2info(inode
)->lli_maxbytes
;
1043 int ll_setxattr(struct dentry
*dentry
, const char *name
,
1044 const void *value
, size_t size
, int flags
);
1045 ssize_t
ll_getxattr(struct dentry
*dentry
, const char *name
,
1046 void *buffer
, size_t size
);
1047 ssize_t
ll_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
1048 int ll_removexattr(struct dentry
*dentry
, const char *name
);
1050 /* llite/remote_perm.c */
1051 extern struct kmem_cache
*ll_remote_perm_cachep
;
1052 extern struct kmem_cache
*ll_rmtperm_hash_cachep
;
1054 void free_rmtperm_hash(struct hlist_head
*hash
);
1055 int ll_update_remote_perm(struct inode
*inode
, struct mdt_remote_perm
*perm
);
1056 int lustre_check_remote_perm(struct inode
*inode
, int mask
);
1058 /* llite/llite_cl.c */
1059 extern struct lu_device_type vvp_device_type
;
1062 * Common IO arguments for various VFS I/O interfaces.
1064 int cl_sb_init(struct super_block
*sb
);
1065 int cl_sb_fini(struct super_block
*sb
);
1066 void ll_io_init(struct cl_io
*io
, const struct file
*file
, int write
);
1068 void ras_update(struct ll_sb_info
*sbi
, struct inode
*inode
,
1069 struct ll_readahead_state
*ras
, unsigned long index
,
1071 void ll_ra_count_put(struct ll_sb_info
*sbi
, unsigned long len
);
1072 void ll_ra_stats_inc(struct address_space
*mapping
, enum ra_stat which
);
1074 /* llite/llite_rmtacl.c */
1075 #ifdef CONFIG_FS_POSIX_ACL
1077 struct list_head ee_list
;
1078 pid_t ee_key
; /* hash key */
1079 struct lu_fid ee_fid
;
1080 int ee_type
; /* ACL type for ACCESS or DEFAULT */
1081 ext_acl_xattr_header
*ee_acl
;
1084 u64
rce_ops2valid(int ops
);
1085 struct rmtacl_ctl_entry
*rct_search(struct rmtacl_ctl_table
*rct
, pid_t key
);
1086 int rct_add(struct rmtacl_ctl_table
*rct
, pid_t key
, int ops
);
1087 int rct_del(struct rmtacl_ctl_table
*rct
, pid_t key
);
1088 void rct_init(struct rmtacl_ctl_table
*rct
);
1089 void rct_fini(struct rmtacl_ctl_table
*rct
);
1091 void ee_free(struct eacl_entry
*ee
);
1092 int ee_add(struct eacl_table
*et
, pid_t key
, struct lu_fid
*fid
, int type
,
1093 ext_acl_xattr_header
*header
);
1094 struct eacl_entry
*et_search_del(struct eacl_table
*et
, pid_t key
,
1095 struct lu_fid
*fid
, int type
);
1096 void et_search_free(struct eacl_table
*et
, pid_t key
);
1097 void et_init(struct eacl_table
*et
);
1098 void et_fini(struct eacl_table
*et
);
1100 static inline u64
rce_ops2valid(int ops
)
1108 #define LL_SA_RPC_MIN 2
1109 #define LL_SA_RPC_DEF 32
1110 #define LL_SA_RPC_MAX 8192
1112 #define LL_SA_CACHE_BIT 5
1113 #define LL_SA_CACHE_SIZE (1 << LL_SA_CACHE_BIT)
1114 #define LL_SA_CACHE_MASK (LL_SA_CACHE_SIZE - 1)
1116 /* per inode struct, for dir only */
1117 struct ll_statahead_info
{
1118 struct inode
*sai_inode
;
1119 atomic_t sai_refcount
; /* when access this struct, hold
1122 unsigned int sai_generation
; /* generation for statahead */
1123 unsigned int sai_max
; /* max ahead of lookup */
1124 __u64 sai_sent
; /* stat requests sent count */
1125 __u64 sai_replied
; /* stat requests which received
1128 __u64 sai_index
; /* index of statahead entry */
1129 __u64 sai_index_wait
; /* index of entry which is the
1130 * caller is waiting for
1132 __u64 sai_hit
; /* hit count */
1133 __u64 sai_miss
; /* miss count:
1134 * for "ls -al" case, it includes
1135 * hidden dentry miss;
1136 * for "ls -l" case, it does not
1137 * include hidden dentry miss.
1138 * "sai_miss_hidden" is used for
1141 unsigned int sai_consecutive_miss
; /* consecutive miss */
1142 unsigned int sai_miss_hidden
;/* "ls -al", but first dentry
1143 * is not a hidden one
1145 unsigned int sai_skip_hidden
;/* skipped hidden dentry count */
1146 unsigned int sai_ls_all
:1, /* "ls -al", do stat-ahead for
1149 sai_agl_valid
:1;/* AGL is valid for the dir */
1150 wait_queue_head_t sai_waitq
; /* stat-ahead wait queue */
1151 struct ptlrpc_thread sai_thread
; /* stat-ahead thread */
1152 struct ptlrpc_thread sai_agl_thread
; /* AGL thread */
1153 struct list_head sai_entries
; /* entry list */
1154 struct list_head sai_entries_received
; /* entries returned */
1155 struct list_head sai_entries_stated
; /* entries stated */
1156 struct list_head sai_entries_agl
; /* AGL entries to be sent */
1157 struct list_head sai_cache
[LL_SA_CACHE_SIZE
];
1158 spinlock_t sai_cache_lock
[LL_SA_CACHE_SIZE
];
1159 atomic_t sai_cache_count
; /* entry count in cache */
1162 int do_statahead_enter(struct inode
*dir
, struct dentry
**dentry
,
1164 void ll_stop_statahead(struct inode
*dir
, void *key
);
1166 static inline int ll_glimpse_size(struct inode
*inode
)
1168 struct ll_inode_info
*lli
= ll_i2info(inode
);
1171 down_read(&lli
->lli_glimpse_sem
);
1172 rc
= cl_glimpse_size(inode
);
1173 lli
->lli_glimpse_time
= cfs_time_current();
1174 up_read(&lli
->lli_glimpse_sem
);
1179 ll_statahead_mark(struct inode
*dir
, struct dentry
*dentry
)
1181 struct ll_inode_info
*lli
= ll_i2info(dir
);
1182 struct ll_statahead_info
*sai
= lli
->lli_sai
;
1183 struct ll_dentry_data
*ldd
= ll_d2d(dentry
);
1185 /* not the same process, don't mark */
1186 if (lli
->lli_opendir_pid
!= current_pid())
1191 ldd
->lld_sa_generation
= sai
->sai_generation
;
1195 d_need_statahead(struct inode
*dir
, struct dentry
*dentryp
)
1197 struct ll_inode_info
*lli
;
1198 struct ll_dentry_data
*ldd
;
1200 if (ll_i2sbi(dir
)->ll_sa_max
== 0)
1203 lli
= ll_i2info(dir
);
1204 /* not the same process, don't statahead */
1205 if (lli
->lli_opendir_pid
!= current_pid())
1208 /* statahead has been stopped */
1209 if (!lli
->lli_opendir_key
)
1212 ldd
= ll_d2d(dentryp
);
1214 * When stats a dentry, the system trigger more than once "revalidate"
1215 * or "lookup", for "getattr", for "getxattr", and maybe for others.
1216 * Under patchless client mode, the operation intent is not accurate,
1217 * which maybe misguide the statahead thread. For example:
1218 * The "revalidate" call for "getattr" and "getxattr" of a dentry maybe
1219 * have the same operation intent -- "IT_GETATTR".
1220 * In fact, one dentry should has only one chance to interact with the
1221 * statahead thread, otherwise the statahead windows will be confused.
1222 * The solution is as following:
1223 * Assign "lld_sa_generation" with "sai_generation" when a dentry
1224 * "IT_GETATTR" for the first time, and the subsequent "IT_GETATTR"
1225 * will bypass interacting with statahead thread for checking:
1226 * "lld_sa_generation == lli_sai->sai_generation"
1228 if (ldd
&& lli
->lli_sai
&&
1229 ldd
->lld_sa_generation
== lli
->lli_sai
->sai_generation
)
1236 ll_statahead_enter(struct inode
*dir
, struct dentry
**dentryp
, int only_unplug
)
1240 ret
= d_need_statahead(dir
, *dentryp
);
1244 return do_statahead_enter(dir
, dentryp
, only_unplug
);
1247 /* llite ioctl register support routine */
1253 #define LLIOC_MAX_CMD 256
1256 * Rules to write a callback function:
1259 * @magic: Dynamic ioctl call routine will feed this value with the pointer
1260 * returned to ll_iocontrol_register. Callback functions should use this
1261 * data to check the potential collasion of ioctl cmd. If collasion is
1262 * found, callback function should return LLIOC_CONT.
1263 * @rcp: The result of ioctl command.
1266 * If @magic matches the pointer returned by ll_iocontrol_data, the
1267 * callback should return LLIOC_STOP; return LLIOC_STOP otherwise.
1269 typedef enum llioc_iter (*llioc_callback_t
)(struct inode
*inode
,
1270 struct file
*file
, unsigned int cmd
, unsigned long arg
,
1271 void *magic
, int *rcp
);
1273 /* export functions */
1274 /* Register ioctl block dynamatically for a regular file.
1276 * @cmd: the array of ioctl command set
1277 * @count: number of commands in the @cmd
1278 * @cb: callback function, it will be called if an ioctl command is found to
1279 * belong to the command list @cmd.
1282 * A magic pointer will be returned if success;
1283 * otherwise, NULL will be returned.
1285 void *ll_iocontrol_register(llioc_callback_t cb
, int count
, unsigned int *cmd
);
1286 void ll_iocontrol_unregister(void *magic
);
1288 /* lclient compat stuff */
1289 #define cl_inode_info ll_inode_info
1290 #define cl_i2info(info) ll_i2info(info)
1291 #define cl_inode_mode(inode) ((inode)->i_mode)
1292 #define cl_i2sbi ll_i2sbi
1294 static inline struct ll_file_data
*cl_iattr2fd(struct inode
*inode
,
1295 const struct iattr
*attr
)
1297 LASSERT(attr
->ia_valid
& ATTR_FILE
);
1298 return LUSTRE_FPRIVATE(attr
->ia_file
);
1301 static inline void cl_isize_write_nolock(struct inode
*inode
, loff_t kms
)
1303 LASSERT(mutex_is_locked(&ll_i2info(inode
)->lli_size_mutex
));
1304 i_size_write(inode
, kms
);
1307 static inline void cl_isize_write(struct inode
*inode
, loff_t kms
)
1309 ll_inode_size_lock(inode
);
1310 i_size_write(inode
, kms
);
1311 ll_inode_size_unlock(inode
);
1314 #define cl_isize_read(inode) i_size_read(inode)
1316 static inline int cl_merge_lvb(const struct lu_env
*env
, struct inode
*inode
)
1318 return ll_merge_lvb(env
, inode
);
1321 #define cl_inode_atime(inode) LTIME_S((inode)->i_atime)
1322 #define cl_inode_ctime(inode) LTIME_S((inode)->i_ctime)
1323 #define cl_inode_mtime(inode) LTIME_S((inode)->i_mtime)
1325 int cl_sync_file_range(struct inode
*inode
, loff_t start
, loff_t end
,
1326 enum cl_fsync_mode mode
, int ignore_layout
);
1328 /** direct write pages */
1329 struct ll_dio_pages
{
1330 /** page array to be written. we don't support
1331 * partial pages except the last one.
1333 struct page
**ldp_pages
;
1334 /* offset of each page */
1335 loff_t
*ldp_offsets
;
1336 /** if ldp_offsets is NULL, it means a sequential
1337 * pages to be written, then this is the file offset
1338 * of the first page.
1340 loff_t ldp_start_offset
;
1341 /** how many bytes are to be written. */
1343 /** # of pages in the array. */
1347 static inline void cl_stats_tally(struct cl_device
*dev
, enum cl_req_type crt
,
1350 int opc
= (crt
== CRT_READ
) ? LPROC_LL_OSC_READ
:
1353 ll_stats_ops_tally(ll_s2sbi(cl2ccc_dev(dev
)->cdv_sb
), opc
, rc
);
1356 ssize_t
ll_direct_rw_pages(const struct lu_env
*env
, struct cl_io
*io
,
1357 int rw
, struct inode
*inode
,
1358 struct ll_dio_pages
*pv
);
1360 static inline int ll_file_nolock(const struct file
*file
)
1362 struct ll_file_data
*fd
= LUSTRE_FPRIVATE(file
);
1363 struct inode
*inode
= file_inode(file
);
1365 return ((fd
->fd_flags
& LL_FILE_IGNORE_LOCK
) ||
1366 (ll_i2sbi(inode
)->ll_flags
& LL_SBI_NOLCK
));
1369 static inline void ll_set_lock_data(struct obd_export
*exp
, struct inode
*inode
,
1370 struct lookup_intent
*it
, __u64
*bits
)
1372 if (!it
->d
.lustre
.it_lock_set
) {
1373 struct lustre_handle handle
;
1375 /* If this inode is a remote object, it will get two
1376 * separate locks in different namespaces, Master MDT,
1377 * where the name entry is, will grant LOOKUP lock,
1378 * remote MDT, where the object is, will grant
1379 * UPDATE|PERM lock. The inode will be attached to both
1380 * LOOKUP and PERM locks, so revoking either locks will
1381 * case the dcache being cleared
1383 if (it
->d
.lustre
.it_remote_lock_mode
) {
1384 handle
.cookie
= it
->d
.lustre
.it_remote_lock_handle
;
1385 CDEBUG(D_DLMTRACE
, "setting l_data to inode %p(%lu/%u) for remote lock %#llx\n",
1387 inode
->i_ino
, inode
->i_generation
,
1389 md_set_lock_data(exp
, &handle
.cookie
, inode
, NULL
);
1392 handle
.cookie
= it
->d
.lustre
.it_lock_handle
;
1394 CDEBUG(D_DLMTRACE
, "setting l_data to inode %p (%lu/%u) for lock %#llx\n",
1395 inode
, inode
->i_ino
,
1396 inode
->i_generation
, handle
.cookie
);
1398 md_set_lock_data(exp
, &handle
.cookie
, inode
,
1399 &it
->d
.lustre
.it_lock_bits
);
1400 it
->d
.lustre
.it_lock_set
= 1;
1404 *bits
= it
->d
.lustre
.it_lock_bits
;
1407 static inline void ll_lock_dcache(struct inode
*inode
)
1409 spin_lock(&inode
->i_lock
);
1412 static inline void ll_unlock_dcache(struct inode
*inode
)
1414 spin_unlock(&inode
->i_lock
);
1417 static inline int d_lustre_invalid(const struct dentry
*dentry
)
1419 struct ll_dentry_data
*lld
= ll_d2d(dentry
);
1421 return !lld
|| lld
->lld_invalid
;
1424 static inline void __d_lustre_invalidate(struct dentry
*dentry
)
1426 struct ll_dentry_data
*lld
= ll_d2d(dentry
);
1429 lld
->lld_invalid
= 1;
1433 * Mark dentry INVALID, if dentry refcount is zero (this is normally case for
1434 * ll_md_blocking_ast), unhash this dentry, and let dcache to reclaim it later;
1435 * else dput() of the last refcount will unhash this dentry and kill it.
1437 static inline void d_lustre_invalidate(struct dentry
*dentry
, int nested
)
1439 CDEBUG(D_DENTRY
, "invalidate dentry %pd (%p) parent %p inode %p refc %d\n",
1441 dentry
->d_parent
, d_inode(dentry
), d_count(dentry
));
1443 spin_lock_nested(&dentry
->d_lock
,
1444 nested
? DENTRY_D_LOCK_NESTED
: DENTRY_D_LOCK_NORMAL
);
1445 __d_lustre_invalidate(dentry
);
1447 * We should be careful about dentries created by d_obtain_alias().
1448 * These dentries are not put in the dentry tree, instead they are
1449 * linked to sb->s_anon through dentry->d_hash.
1450 * shrink_dcache_for_umount() shrinks the tree and sb->s_anon list.
1451 * If we unhashed such a dentry, unmount would not be able to find
1452 * it and busy inodes would be reported.
1454 if (d_count(dentry
) == 0 && !(dentry
->d_flags
& DCACHE_DISCONNECTED
))
1456 spin_unlock(&dentry
->d_lock
);
1459 static inline void d_lustre_revalidate(struct dentry
*dentry
)
1461 spin_lock(&dentry
->d_lock
);
1462 LASSERT(ll_d2d(dentry
));
1463 ll_d2d(dentry
)->lld_invalid
= 0;
1464 spin_unlock(&dentry
->d_lock
);
1468 LL_LAYOUT_GEN_NONE
= ((__u32
)-2), /* layout lock was cancelled */
1469 LL_LAYOUT_GEN_EMPTY
= ((__u32
)-1) /* for empty layout */
1472 int ll_layout_conf(struct inode
*inode
, const struct cl_object_conf
*conf
);
1473 int ll_layout_refresh(struct inode
*inode
, __u32
*gen
);
1474 int ll_layout_restore(struct inode
*inode
);
1476 int ll_xattr_init(void);
1477 void ll_xattr_fini(void);
1479 #endif /* LLITE_INTERNAL_H */