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d7e09d03 PT |
1 | /* |
2 | * GPL HEADER START | |
3 | * | |
4 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
5 | * | |
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. | |
9 | * | |
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). | |
15 | * | |
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 | |
19 | * | |
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 | |
22 | * have any questions. | |
23 | * | |
24 | * GPL HEADER END | |
25 | */ | |
26 | /* | |
27 | * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. | |
28 | * Use is subject to license terms. | |
29 | * | |
30 | * Copyright (c) 2011, 2012, Intel Corporation. | |
31 | */ | |
32 | /* | |
33 | * This file is part of Lustre, http://www.lustre.org/ | |
34 | * Lustre is a trademark of Sun Microsystems, Inc. | |
35 | */ | |
36 | ||
37 | #ifndef LLITE_INTERNAL_H | |
38 | #define LLITE_INTERNAL_H | |
39 | #include <lustre_debug.h> | |
40 | #include <lustre_ver.h> | |
41 | #include <lustre_disk.h> /* for s2sbi */ | |
42 | #include <lustre_eacl.h> | |
43 | ||
44 | /* for struct cl_lock_descr and struct cl_io */ | |
45 | #include <cl_object.h> | |
46 | #include <lclient.h> | |
47 | #include <lustre_mdc.h> | |
48 | #include <linux/lustre_intent.h> | |
49 | ||
50 | #ifndef FMODE_EXEC | |
51 | #define FMODE_EXEC 0 | |
52 | #endif | |
53 | ||
54 | #ifndef VM_FAULT_RETRY | |
55 | #define VM_FAULT_RETRY 0 | |
56 | #endif | |
57 | ||
58 | /* Kernel 3.1 kills LOOKUP_CONTINUE, LOOKUP_PARENT is equivalent to it. | |
59 | * seem kernel commit 49084c3bb2055c401f3493c13edae14d49128ca0 */ | |
60 | #ifndef LOOKUP_CONTINUE | |
61 | #define LOOKUP_CONTINUE LOOKUP_PARENT | |
62 | #endif | |
63 | ||
64 | /** Only used on client-side for indicating the tail of dir hash/offset. */ | |
65 | #define LL_DIR_END_OFF 0x7fffffffffffffffULL | |
66 | #define LL_DIR_END_OFF_32BIT 0x7fffffffUL | |
67 | ||
68 | #define LL_IT2STR(it) ((it) ? ldlm_it2str((it)->it_op) : "0") | |
69 | #define LUSTRE_FPRIVATE(file) ((file)->private_data) | |
70 | ||
71 | struct ll_dentry_data { | |
72 | int lld_cwd_count; | |
73 | int lld_mnt_count; | |
74 | struct obd_client_handle lld_cwd_och; | |
75 | struct obd_client_handle lld_mnt_och; | |
76 | struct lookup_intent *lld_it; | |
77 | unsigned int lld_sa_generation; | |
78 | unsigned int lld_invalid:1; | |
79 | struct rcu_head lld_rcu_head; | |
80 | }; | |
81 | ||
82 | #define ll_d2d(de) ((struct ll_dentry_data*)((de)->d_fsdata)) | |
83 | ||
84 | extern struct file_operations ll_pgcache_seq_fops; | |
85 | ||
86 | #define LLI_INODE_MAGIC 0x111d0de5 | |
87 | #define LLI_INODE_DEAD 0xdeadd00d | |
88 | ||
89 | /* remote client permission cache */ | |
90 | #define REMOTE_PERM_HASHSIZE 16 | |
91 | ||
92 | struct ll_getname_data { | |
93 | char *lgd_name; /* points to a buffer with NAME_MAX+1 size */ | |
94 | struct lu_fid lgd_fid; /* target fid we are looking for */ | |
95 | int lgd_found; /* inode matched? */ | |
96 | }; | |
97 | ||
98 | /* llite setxid/access permission for user on remote client */ | |
99 | struct ll_remote_perm { | |
100 | struct hlist_node lrp_list; | |
101 | uid_t lrp_uid; | |
102 | gid_t lrp_gid; | |
103 | uid_t lrp_fsuid; | |
104 | gid_t lrp_fsgid; | |
105 | int lrp_access_perm; /* MAY_READ/WRITE/EXEC, this | |
106 | is access permission with | |
107 | lrp_fsuid/lrp_fsgid. */ | |
108 | }; | |
109 | ||
110 | enum lli_flags { | |
111 | /* MDS has an authority for the Size-on-MDS attributes. */ | |
112 | LLIF_MDS_SIZE_LOCK = (1 << 0), | |
113 | /* Epoch close is postponed. */ | |
114 | LLIF_EPOCH_PENDING = (1 << 1), | |
115 | /* DONE WRITING is allowed. */ | |
116 | LLIF_DONE_WRITING = (1 << 2), | |
117 | /* Sizeon-on-MDS attributes are changed. An attribute update needs to | |
118 | * be sent to MDS. */ | |
119 | LLIF_SOM_DIRTY = (1 << 3), | |
120 | /* File is contented */ | |
121 | LLIF_CONTENDED = (1 << 4), | |
122 | /* Truncate uses server lock for this file */ | |
123 | LLIF_SRVLOCK = (1 << 5), | |
124 | /* File data is modified. */ | |
125 | LLIF_DATA_MODIFIED = (1 << 6), | |
126 | }; | |
127 | ||
128 | struct ll_inode_info { | |
129 | __u32 lli_inode_magic; | |
130 | __u32 lli_flags; | |
131 | __u64 lli_ioepoch; | |
132 | ||
133 | spinlock_t lli_lock; | |
134 | struct posix_acl *lli_posix_acl; | |
135 | ||
136 | struct hlist_head *lli_remote_perms; | |
137 | struct mutex lli_rmtperm_mutex; | |
138 | ||
139 | /* identifying fields for both metadata and data stacks. */ | |
140 | struct lu_fid lli_fid; | |
141 | /* Parent fid for accessing default stripe data on parent directory | |
142 | * for allocating OST objects after a mknod() and later open-by-FID. */ | |
143 | struct lu_fid lli_pfid; | |
144 | ||
145 | struct list_head lli_close_list; | |
146 | struct list_head lli_oss_capas; | |
147 | /* open count currently used by capability only, indicate whether | |
148 | * capability needs renewal */ | |
149 | atomic_t lli_open_count; | |
150 | struct obd_capa *lli_mds_capa; | |
151 | cfs_time_t lli_rmtperm_time; | |
152 | ||
153 | /* handle is to be sent to MDS later on done_writing and setattr. | |
154 | * Open handle data are needed for the recovery to reconstruct | |
155 | * the inode state on the MDS. XXX: recovery is not ready yet. */ | |
156 | struct obd_client_handle *lli_pending_och; | |
157 | ||
158 | /* We need all three because every inode may be opened in different | |
159 | * modes */ | |
160 | struct obd_client_handle *lli_mds_read_och; | |
161 | struct obd_client_handle *lli_mds_write_och; | |
162 | struct obd_client_handle *lli_mds_exec_och; | |
163 | __u64 lli_open_fd_read_count; | |
164 | __u64 lli_open_fd_write_count; | |
165 | __u64 lli_open_fd_exec_count; | |
166 | /* Protects access to och pointers and their usage counters */ | |
167 | struct mutex lli_och_mutex; | |
168 | ||
169 | struct inode lli_vfs_inode; | |
170 | ||
171 | /* the most recent timestamps obtained from mds */ | |
172 | struct ost_lvb lli_lvb; | |
173 | spinlock_t lli_agl_lock; | |
174 | ||
175 | /* Try to make the d::member and f::member are aligned. Before using | |
176 | * these members, make clear whether it is directory or not. */ | |
177 | union { | |
178 | /* for directory */ | |
179 | struct { | |
180 | /* serialize normal readdir and statahead-readdir. */ | |
181 | struct mutex d_readdir_mutex; | |
182 | ||
183 | /* metadata statahead */ | |
184 | /* since parent-child threads can share the same @file | |
185 | * struct, "opendir_key" is the token when dir close for | |
186 | * case of parent exit before child -- it is me should | |
187 | * cleanup the dir readahead. */ | |
188 | void *d_opendir_key; | |
189 | struct ll_statahead_info *d_sai; | |
190 | struct posix_acl *d_def_acl; | |
191 | /* protect statahead stuff. */ | |
192 | spinlock_t d_sa_lock; | |
193 | /* "opendir_pid" is the token when lookup/revalid | |
194 | * -- I am the owner of dir statahead. */ | |
195 | pid_t d_opendir_pid; | |
196 | } d; | |
197 | ||
198 | #define lli_readdir_mutex u.d.d_readdir_mutex | |
199 | #define lli_opendir_key u.d.d_opendir_key | |
200 | #define lli_sai u.d.d_sai | |
201 | #define lli_def_acl u.d.d_def_acl | |
202 | #define lli_sa_lock u.d.d_sa_lock | |
203 | #define lli_opendir_pid u.d.d_opendir_pid | |
204 | ||
205 | /* for non-directory */ | |
206 | struct { | |
207 | struct semaphore f_size_sem; | |
208 | void *f_size_sem_owner; | |
209 | char *f_symlink_name; | |
210 | __u64 f_maxbytes; | |
211 | /* | |
212 | * struct rw_semaphore { | |
213 | * signed long count; // align d.d_def_acl | |
214 | * spinlock_t wait_lock; // align d.d_sa_lock | |
215 | * struct list_head wait_list; | |
216 | * } | |
217 | */ | |
218 | struct rw_semaphore f_trunc_sem; | |
219 | struct mutex f_write_mutex; | |
220 | ||
221 | struct rw_semaphore f_glimpse_sem; | |
222 | cfs_time_t f_glimpse_time; | |
223 | struct list_head f_agl_list; | |
224 | __u64 f_agl_index; | |
225 | ||
226 | /* for writepage() only to communicate to fsync */ | |
227 | int f_async_rc; | |
228 | ||
229 | /* volatile file criteria is based on file name, this | |
230 | * flag is used to keep the test result, so the strcmp | |
231 | * is done only once | |
232 | */ | |
233 | bool f_volatile; | |
234 | /* | |
235 | * whenever a process try to read/write the file, the | |
236 | * jobid of the process will be saved here, and it'll | |
237 | * be packed into the write PRC when flush later. | |
238 | * | |
239 | * so the read/write statistics for jobid will not be | |
240 | * accurate if the file is shared by different jobs. | |
241 | */ | |
242 | char f_jobid[JOBSTATS_JOBID_SIZE]; | |
243 | } f; | |
244 | ||
245 | #define lli_size_sem u.f.f_size_sem | |
246 | #define lli_size_sem_owner u.f.f_size_sem_owner | |
247 | #define lli_symlink_name u.f.f_symlink_name | |
248 | #define lli_maxbytes u.f.f_maxbytes | |
249 | #define lli_trunc_sem u.f.f_trunc_sem | |
250 | #define lli_write_mutex u.f.f_write_mutex | |
251 | #define lli_glimpse_sem u.f.f_glimpse_sem | |
252 | #define lli_glimpse_time u.f.f_glimpse_time | |
253 | #define lli_agl_list u.f.f_agl_list | |
254 | #define lli_agl_index u.f.f_agl_index | |
255 | #define lli_async_rc u.f.f_async_rc | |
256 | #define lli_jobid u.f.f_jobid | |
257 | #define lli_volatile u.f.f_volatile | |
258 | ||
259 | } u; | |
260 | ||
261 | /* XXX: For following frequent used members, although they maybe special | |
262 | * used for non-directory object, it is some time-wasting to check | |
263 | * whether the object is directory or not before using them. On the | |
264 | * other hand, currently, sizeof(f) > sizeof(d), it cannot reduce | |
265 | * the "ll_inode_info" size even if moving those members into u.f. | |
266 | * So keep them out side. | |
267 | * | |
268 | * In the future, if more members are added only for directory, | |
269 | * some of the following members can be moved into u.f. | |
270 | */ | |
271 | bool lli_has_smd; | |
272 | struct cl_object *lli_clob; | |
273 | ||
274 | /* mutex to request for layout lock exclusively. */ | |
275 | struct mutex lli_layout_mutex; | |
276 | /* valid only inside LAYOUT ibits lock, protected by lli_layout_mutex */ | |
277 | __u32 lli_layout_gen; | |
278 | }; | |
279 | ||
280 | /* | |
281 | * Locking to guarantee consistency of non-atomic updates to long long i_size, | |
282 | * consistency between file size and KMS. | |
283 | * | |
284 | * Implemented by ->lli_size_sem and ->lsm_lock, nested in that order. | |
285 | */ | |
286 | ||
287 | void ll_inode_size_lock(struct inode *inode); | |
288 | void ll_inode_size_unlock(struct inode *inode); | |
289 | ||
290 | // FIXME: replace the name of this with LL_I to conform to kernel stuff | |
291 | // static inline struct ll_inode_info *LL_I(struct inode *inode) | |
292 | static inline struct ll_inode_info *ll_i2info(struct inode *inode) | |
293 | { | |
294 | return container_of(inode, struct ll_inode_info, lli_vfs_inode); | |
295 | } | |
296 | ||
297 | /* default to about 40meg of readahead on a given system. That much tied | |
298 | * up in 512k readahead requests serviced at 40ms each is about 1GB/s. */ | |
299 | #define SBI_DEFAULT_READAHEAD_MAX (40UL << (20 - PAGE_CACHE_SHIFT)) | |
300 | ||
301 | /* default to read-ahead full files smaller than 2MB on the second read */ | |
302 | #define SBI_DEFAULT_READAHEAD_WHOLE_MAX (2UL << (20 - PAGE_CACHE_SHIFT)) | |
303 | ||
304 | enum ra_stat { | |
305 | RA_STAT_HIT = 0, | |
306 | RA_STAT_MISS, | |
307 | RA_STAT_DISTANT_READPAGE, | |
308 | RA_STAT_MISS_IN_WINDOW, | |
309 | RA_STAT_FAILED_GRAB_PAGE, | |
310 | RA_STAT_FAILED_MATCH, | |
311 | RA_STAT_DISCARDED, | |
312 | RA_STAT_ZERO_LEN, | |
313 | RA_STAT_ZERO_WINDOW, | |
314 | RA_STAT_EOF, | |
315 | RA_STAT_MAX_IN_FLIGHT, | |
316 | RA_STAT_WRONG_GRAB_PAGE, | |
317 | _NR_RA_STAT, | |
318 | }; | |
319 | ||
320 | struct ll_ra_info { | |
321 | atomic_t ra_cur_pages; | |
322 | unsigned long ra_max_pages; | |
323 | unsigned long ra_max_pages_per_file; | |
324 | unsigned long ra_max_read_ahead_whole_pages; | |
325 | }; | |
326 | ||
327 | /* ra_io_arg will be filled in the beginning of ll_readahead with | |
328 | * ras_lock, then the following ll_read_ahead_pages will read RA | |
329 | * pages according to this arg, all the items in this structure are | |
330 | * counted by page index. | |
331 | */ | |
332 | struct ra_io_arg { | |
333 | unsigned long ria_start; /* start offset of read-ahead*/ | |
334 | unsigned long ria_end; /* end offset of read-ahead*/ | |
335 | /* If stride read pattern is detected, ria_stoff means where | |
336 | * stride read is started. Note: for normal read-ahead, the | |
337 | * value here is meaningless, and also it will not be accessed*/ | |
338 | pgoff_t ria_stoff; | |
339 | /* ria_length and ria_pages are the length and pages length in the | |
340 | * stride I/O mode. And they will also be used to check whether | |
341 | * it is stride I/O read-ahead in the read-ahead pages*/ | |
342 | unsigned long ria_length; | |
343 | unsigned long ria_pages; | |
344 | }; | |
345 | ||
346 | /* LL_HIST_MAX=32 causes an overflow */ | |
347 | #define LL_HIST_MAX 28 | |
348 | #define LL_HIST_START 12 /* buckets start at 2^12 = 4k */ | |
349 | #define LL_PROCESS_HIST_MAX 10 | |
350 | struct per_process_info { | |
351 | pid_t pid; | |
352 | struct obd_histogram pp_r_hist; | |
353 | struct obd_histogram pp_w_hist; | |
354 | }; | |
355 | ||
356 | /* pp_extents[LL_PROCESS_HIST_MAX] will hold the combined process info */ | |
357 | struct ll_rw_extents_info { | |
358 | struct per_process_info pp_extents[LL_PROCESS_HIST_MAX + 1]; | |
359 | }; | |
360 | ||
361 | #define LL_OFFSET_HIST_MAX 100 | |
362 | struct ll_rw_process_info { | |
363 | pid_t rw_pid; | |
364 | int rw_op; | |
365 | loff_t rw_range_start; | |
366 | loff_t rw_range_end; | |
367 | loff_t rw_last_file_pos; | |
368 | loff_t rw_offset; | |
369 | size_t rw_smallest_extent; | |
370 | size_t rw_largest_extent; | |
371 | struct ll_file_data *rw_last_file; | |
372 | }; | |
373 | ||
374 | enum stats_track_type { | |
375 | STATS_TRACK_ALL = 0, /* track all processes */ | |
376 | STATS_TRACK_PID, /* track process with this pid */ | |
377 | STATS_TRACK_PPID, /* track processes with this ppid */ | |
378 | STATS_TRACK_GID, /* track processes with this gid */ | |
379 | STATS_TRACK_LAST, | |
380 | }; | |
381 | ||
382 | /* flags for sbi->ll_flags */ | |
383 | #define LL_SBI_NOLCK 0x01 /* DLM locking disabled (directio-only) */ | |
384 | #define LL_SBI_CHECKSUM 0x02 /* checksum each page as it's written */ | |
385 | #define LL_SBI_FLOCK 0x04 | |
386 | #define LL_SBI_USER_XATTR 0x08 /* support user xattr */ | |
387 | #define LL_SBI_ACL 0x10 /* support ACL */ | |
388 | #define LL_SBI_RMT_CLIENT 0x40 /* remote client */ | |
389 | #define LL_SBI_MDS_CAPA 0x80 /* support mds capa */ | |
390 | #define LL_SBI_OSS_CAPA 0x100 /* support oss capa */ | |
391 | #define LL_SBI_LOCALFLOCK 0x200 /* Local flocks support by kernel */ | |
392 | #define LL_SBI_LRU_RESIZE 0x400 /* lru resize support */ | |
393 | #define LL_SBI_LAZYSTATFS 0x800 /* lazystatfs mount option */ | |
394 | #define LL_SBI_SOM_PREVIEW 0x1000 /* SOM preview mount option */ | |
395 | #define LL_SBI_32BIT_API 0x2000 /* generate 32 bit inodes. */ | |
396 | #define LL_SBI_64BIT_HASH 0x4000 /* support 64-bits dir hash/offset */ | |
397 | #define LL_SBI_AGL_ENABLED 0x8000 /* enable agl */ | |
398 | #define LL_SBI_VERBOSE 0x10000 /* verbose mount/umount */ | |
399 | #define LL_SBI_LAYOUT_LOCK 0x20000 /* layout lock support */ | |
400 | #define LL_SBI_USER_FID2PATH 0x40000 /* allow fid2path by unprivileged users */ | |
401 | ||
402 | #define LL_SBI_FLAGS { \ | |
403 | "nolck", \ | |
404 | "checksum", \ | |
405 | "flock", \ | |
406 | "xattr", \ | |
407 | "acl", \ | |
408 | "rmt_client", \ | |
409 | "mds_capa", \ | |
410 | "oss_capa", \ | |
411 | "flock", \ | |
412 | "lru_resize", \ | |
413 | "lazy_statfs", \ | |
414 | "som", \ | |
415 | "32bit_api", \ | |
416 | "64bit_hash", \ | |
417 | "agl", \ | |
418 | "verbose", \ | |
419 | "layout", \ | |
420 | "user_fid2path" } | |
421 | ||
422 | /* default value for ll_sb_info->contention_time */ | |
423 | #define SBI_DEFAULT_CONTENTION_SECONDS 60 | |
424 | /* default value for lockless_truncate_enable */ | |
425 | #define SBI_DEFAULT_LOCKLESS_TRUNCATE_ENABLE 1 | |
426 | #define RCE_HASHES 32 | |
427 | ||
428 | struct rmtacl_ctl_entry { | |
429 | struct list_head rce_list; | |
430 | pid_t rce_key; /* hash key */ | |
431 | int rce_ops; /* acl operation type */ | |
432 | }; | |
433 | ||
434 | struct rmtacl_ctl_table { | |
435 | spinlock_t rct_lock; | |
436 | struct list_head rct_entries[RCE_HASHES]; | |
437 | }; | |
438 | ||
439 | #define EE_HASHES 32 | |
440 | ||
441 | struct eacl_entry { | |
442 | struct list_head ee_list; | |
443 | pid_t ee_key; /* hash key */ | |
444 | struct lu_fid ee_fid; | |
445 | int ee_type; /* ACL type for ACCESS or DEFAULT */ | |
446 | ext_acl_xattr_header *ee_acl; | |
447 | }; | |
448 | ||
449 | struct eacl_table { | |
450 | spinlock_t et_lock; | |
451 | struct list_head et_entries[EE_HASHES]; | |
452 | }; | |
453 | ||
454 | struct ll_sb_info { | |
455 | struct list_head ll_list; | |
456 | /* this protects pglist and ra_info. It isn't safe to | |
457 | * grab from interrupt contexts */ | |
458 | spinlock_t ll_lock; | |
459 | spinlock_t ll_pp_extent_lock; /* pp_extent entry*/ | |
460 | spinlock_t ll_process_lock; /* ll_rw_process_info */ | |
461 | struct obd_uuid ll_sb_uuid; | |
462 | struct obd_export *ll_md_exp; | |
463 | struct obd_export *ll_dt_exp; | |
464 | struct proc_dir_entry* ll_proc_root; | |
465 | struct lu_fid ll_root_fid; /* root object fid */ | |
466 | ||
467 | int ll_flags; | |
65fb55d1 | 468 | int ll_umounting:1; |
d7e09d03 PT |
469 | struct list_head ll_conn_chain; /* per-conn chain of SBs */ |
470 | struct lustre_client_ocd ll_lco; | |
471 | ||
472 | struct list_head ll_orphan_dentry_list; /*please don't ask -p*/ | |
473 | struct ll_close_queue *ll_lcq; | |
474 | ||
475 | struct lprocfs_stats *ll_stats; /* lprocfs stats counter */ | |
476 | ||
d7e09d03 PT |
477 | struct cl_client_cache ll_cache; |
478 | ||
479 | struct lprocfs_stats *ll_ra_stats; | |
480 | ||
481 | struct ll_ra_info ll_ra_info; | |
482 | unsigned int ll_namelen; | |
483 | struct file_operations *ll_fop; | |
484 | ||
485 | /* =0 - hold lock over whole read/write | |
486 | * >0 - max. chunk to be read/written w/o lock re-acquiring */ | |
487 | unsigned long ll_max_rw_chunk; | |
488 | unsigned int ll_md_brw_size; /* used by readdir */ | |
489 | ||
490 | struct lu_site *ll_site; | |
491 | struct cl_device *ll_cl; | |
492 | /* Statistics */ | |
493 | struct ll_rw_extents_info ll_rw_extents_info; | |
494 | int ll_extent_process_count; | |
495 | struct ll_rw_process_info ll_rw_process_info[LL_PROCESS_HIST_MAX]; | |
496 | unsigned int ll_offset_process_count; | |
497 | struct ll_rw_process_info ll_rw_offset_info[LL_OFFSET_HIST_MAX]; | |
498 | unsigned int ll_rw_offset_entry_count; | |
499 | int ll_stats_track_id; | |
500 | enum stats_track_type ll_stats_track_type; | |
501 | int ll_rw_stats_on; | |
502 | ||
503 | /* metadata stat-ahead */ | |
504 | unsigned int ll_sa_max; /* max statahead RPCs */ | |
505 | atomic_t ll_sa_total; /* statahead thread started | |
506 | * count */ | |
507 | atomic_t ll_sa_wrong; /* statahead thread stopped for | |
508 | * low hit ratio */ | |
509 | atomic_t ll_agl_total; /* AGL thread started count */ | |
510 | ||
511 | dev_t ll_sdev_orig; /* save s_dev before assign for | |
512 | * clustred nfs */ | |
513 | struct rmtacl_ctl_table ll_rct; | |
514 | struct eacl_table ll_et; | |
515 | }; | |
516 | ||
517 | #define LL_DEFAULT_MAX_RW_CHUNK (32 * 1024 * 1024) | |
518 | ||
519 | struct ll_ra_read { | |
520 | pgoff_t lrr_start; | |
521 | pgoff_t lrr_count; | |
522 | struct task_struct *lrr_reader; | |
523 | struct list_head lrr_linkage; | |
524 | }; | |
525 | ||
526 | /* | |
527 | * per file-descriptor read-ahead data. | |
528 | */ | |
529 | struct ll_readahead_state { | |
530 | spinlock_t ras_lock; | |
531 | /* | |
532 | * index of the last page that read(2) needed and that wasn't in the | |
533 | * cache. Used by ras_update() to detect seeks. | |
534 | * | |
535 | * XXX nikita: if access seeks into cached region, Lustre doesn't see | |
536 | * this. | |
537 | */ | |
538 | unsigned long ras_last_readpage; | |
539 | /* | |
540 | * number of pages read after last read-ahead window reset. As window | |
541 | * is reset on each seek, this is effectively a number of consecutive | |
542 | * accesses. Maybe ->ras_accessed_in_window is better name. | |
543 | * | |
544 | * XXX nikita: window is also reset (by ras_update()) when Lustre | |
545 | * believes that memory pressure evicts read-ahead pages. In that | |
546 | * case, it probably doesn't make sense to expand window to | |
547 | * PTLRPC_MAX_BRW_PAGES on the third access. | |
548 | */ | |
549 | unsigned long ras_consecutive_pages; | |
550 | /* | |
551 | * number of read requests after the last read-ahead window reset | |
552 | * As window is reset on each seek, this is effectively the number | |
553 | * on consecutive read request and is used to trigger read-ahead. | |
554 | */ | |
555 | unsigned long ras_consecutive_requests; | |
556 | /* | |
557 | * Parameters of current read-ahead window. Handled by | |
558 | * ras_update(). On the initial access to the file or after a seek, | |
559 | * window is reset to 0. After 3 consecutive accesses, window is | |
560 | * expanded to PTLRPC_MAX_BRW_PAGES. Afterwards, window is enlarged by | |
561 | * PTLRPC_MAX_BRW_PAGES chunks up to ->ra_max_pages. | |
562 | */ | |
563 | unsigned long ras_window_start, ras_window_len; | |
564 | /* | |
565 | * Where next read-ahead should start at. This lies within read-ahead | |
566 | * window. Read-ahead window is read in pieces rather than at once | |
567 | * because: 1. lustre limits total number of pages under read-ahead by | |
568 | * ->ra_max_pages (see ll_ra_count_get()), 2. client cannot read pages | |
569 | * not covered by DLM lock. | |
570 | */ | |
571 | unsigned long ras_next_readahead; | |
572 | /* | |
573 | * Total number of ll_file_read requests issued, reads originating | |
574 | * due to mmap are not counted in this total. This value is used to | |
575 | * trigger full file read-ahead after multiple reads to a small file. | |
576 | */ | |
577 | unsigned long ras_requests; | |
578 | /* | |
579 | * Page index with respect to the current request, these value | |
580 | * will not be accurate when dealing with reads issued via mmap. | |
581 | */ | |
582 | unsigned long ras_request_index; | |
583 | /* | |
584 | * list of struct ll_ra_read's one per read(2) call current in | |
585 | * progress against this file descriptor. Used by read-ahead code, | |
586 | * protected by ->ras_lock. | |
587 | */ | |
588 | struct list_head ras_read_beads; | |
589 | /* | |
590 | * The following 3 items are used for detecting the stride I/O | |
591 | * mode. | |
592 | * In stride I/O mode, | |
593 | * ...............|-----data-----|****gap*****|--------|******|.... | |
594 | * offset |-stride_pages-|-stride_gap-| | |
595 | * ras_stride_offset = offset; | |
596 | * ras_stride_length = stride_pages + stride_gap; | |
597 | * ras_stride_pages = stride_pages; | |
598 | * Note: all these three items are counted by pages. | |
599 | */ | |
600 | unsigned long ras_stride_length; | |
601 | unsigned long ras_stride_pages; | |
602 | pgoff_t ras_stride_offset; | |
603 | /* | |
604 | * number of consecutive stride request count, and it is similar as | |
605 | * ras_consecutive_requests, but used for stride I/O mode. | |
606 | * Note: only more than 2 consecutive stride request are detected, | |
607 | * stride read-ahead will be enable | |
608 | */ | |
609 | unsigned long ras_consecutive_stride_requests; | |
610 | }; | |
611 | ||
612 | extern struct kmem_cache *ll_file_data_slab; | |
613 | struct lustre_handle; | |
614 | struct ll_file_data { | |
615 | struct ll_readahead_state fd_ras; | |
616 | int fd_omode; | |
617 | struct ccc_grouplock fd_grouplock; | |
618 | __u64 lfd_pos; | |
619 | __u32 fd_flags; | |
620 | struct file *fd_file; | |
621 | /* Indicate whether need to report failure when close. | |
622 | * true: failure is known, not report again. | |
623 | * false: unknown failure, should report. */ | |
624 | bool fd_write_failed; | |
625 | }; | |
626 | ||
627 | struct lov_stripe_md; | |
628 | ||
629 | extern spinlock_t inode_lock; | |
630 | ||
631 | extern struct proc_dir_entry *proc_lustre_fs_root; | |
632 | ||
633 | static inline struct inode *ll_info2i(struct ll_inode_info *lli) | |
634 | { | |
635 | return &lli->lli_vfs_inode; | |
636 | } | |
637 | ||
638 | struct it_cb_data { | |
639 | struct inode *icbd_parent; | |
640 | struct dentry **icbd_childp; | |
641 | obd_id hash; | |
642 | }; | |
643 | ||
644 | __u32 ll_i2suppgid(struct inode *i); | |
645 | void ll_i2gids(__u32 *suppgids, struct inode *i1,struct inode *i2); | |
646 | ||
647 | static inline int ll_need_32bit_api(struct ll_sb_info *sbi) | |
648 | { | |
649 | #if BITS_PER_LONG == 32 | |
650 | return 1; | |
651 | #else | |
652 | return unlikely(current_is_32bit() || (sbi->ll_flags & LL_SBI_32BIT_API)); | |
653 | #endif | |
654 | } | |
655 | ||
656 | #define LLAP_MAGIC 98764321 | |
657 | ||
658 | extern struct kmem_cache *ll_async_page_slab; | |
659 | extern size_t ll_async_page_slab_size; | |
660 | ||
661 | void ll_ra_read_in(struct file *f, struct ll_ra_read *rar); | |
662 | void ll_ra_read_ex(struct file *f, struct ll_ra_read *rar); | |
663 | struct ll_ra_read *ll_ra_read_get(struct file *f); | |
664 | ||
665 | /* llite/lproc_llite.c */ | |
666 | #ifdef LPROCFS | |
667 | int lprocfs_register_mountpoint(struct proc_dir_entry *parent, | |
668 | struct super_block *sb, char *osc, char *mdc); | |
669 | void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi); | |
670 | void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count); | |
671 | void lprocfs_llite_init_vars(struct lprocfs_static_vars *lvars); | |
672 | #else | |
673 | static inline int lprocfs_register_mountpoint(struct proc_dir_entry *parent, | |
674 | struct super_block *sb, char *osc, char *mdc){return 0;} | |
675 | static inline void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi) {} | |
676 | static void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count) {} | |
677 | static void lprocfs_llite_init_vars(struct lprocfs_static_vars *lvars) | |
678 | { | |
679 | memset(lvars, 0, sizeof(*lvars)); | |
680 | } | |
681 | #endif | |
682 | ||
683 | ||
684 | /* llite/dir.c */ | |
685 | void ll_release_page(struct page *page, int remove); | |
686 | extern struct file_operations ll_dir_operations; | |
687 | extern struct inode_operations ll_dir_inode_operations; | |
688 | struct page *ll_get_dir_page(struct inode *dir, __u64 hash, | |
689 | struct ll_dir_chain *chain); | |
690 | int ll_dir_read(struct inode *inode, __u64 *_pos, void *cookie, | |
691 | filldir_t filldir); | |
692 | ||
693 | int ll_get_mdt_idx(struct inode *inode); | |
694 | /* llite/namei.c */ | |
695 | int ll_objects_destroy(struct ptlrpc_request *request, | |
696 | struct inode *dir); | |
697 | struct inode *ll_iget(struct super_block *sb, ino_t hash, | |
698 | struct lustre_md *lic); | |
699 | int ll_md_blocking_ast(struct ldlm_lock *, struct ldlm_lock_desc *, | |
700 | void *data, int flag); | |
701 | struct dentry *ll_splice_alias(struct inode *inode, struct dentry *de); | |
702 | int ll_rmdir_entry(struct inode *dir, char *name, int namelen); | |
703 | ||
704 | /* llite/rw.c */ | |
705 | int ll_prepare_write(struct file *, struct page *, unsigned from, unsigned to); | |
706 | int ll_commit_write(struct file *, struct page *, unsigned from, unsigned to); | |
707 | int ll_writepage(struct page *page, struct writeback_control *wbc); | |
708 | int ll_writepages(struct address_space *, struct writeback_control *wbc); | |
709 | void ll_removepage(struct page *page); | |
710 | int ll_readpage(struct file *file, struct page *page); | |
711 | void ll_readahead_init(struct inode *inode, struct ll_readahead_state *ras); | |
712 | int ll_file_punch(struct inode *, loff_t, int); | |
713 | ssize_t ll_file_lockless_io(struct file *, char *, size_t, loff_t *, int); | |
714 | void ll_clear_file_contended(struct inode*); | |
715 | int ll_sync_page_range(struct inode *, struct address_space *, loff_t, size_t); | |
716 | int ll_readahead(const struct lu_env *env, struct cl_io *io, | |
717 | struct ll_readahead_state *ras, struct address_space *mapping, | |
718 | struct cl_page_list *queue, int flags); | |
719 | ||
720 | /* llite/file.c */ | |
721 | extern struct file_operations ll_file_operations; | |
722 | extern struct file_operations ll_file_operations_flock; | |
723 | extern struct file_operations ll_file_operations_noflock; | |
724 | extern struct inode_operations ll_file_inode_operations; | |
725 | extern int ll_inode_revalidate_it(struct dentry *, struct lookup_intent *, | |
726 | __u64); | |
727 | extern int ll_have_md_lock(struct inode *inode, __u64 *bits, | |
728 | ldlm_mode_t l_req_mode); | |
729 | extern ldlm_mode_t ll_take_md_lock(struct inode *inode, __u64 bits, | |
730 | struct lustre_handle *lockh, __u64 flags); | |
731 | int __ll_inode_revalidate_it(struct dentry *, struct lookup_intent *, | |
732 | __u64 bits); | |
733 | int ll_revalidate_nd(struct dentry *dentry, unsigned int flags); | |
734 | int ll_file_open(struct inode *inode, struct file *file); | |
735 | int ll_file_release(struct inode *inode, struct file *file); | |
736 | int ll_glimpse_ioctl(struct ll_sb_info *sbi, | |
737 | struct lov_stripe_md *lsm, lstat_t *st); | |
738 | void ll_ioepoch_open(struct ll_inode_info *lli, __u64 ioepoch); | |
739 | int ll_local_open(struct file *file, | |
740 | struct lookup_intent *it, struct ll_file_data *fd, | |
741 | struct obd_client_handle *och); | |
742 | int ll_release_openhandle(struct dentry *, struct lookup_intent *); | |
743 | int ll_md_close(struct obd_export *md_exp, struct inode *inode, | |
744 | struct file *file); | |
745 | int ll_md_real_close(struct inode *inode, int flags); | |
746 | void ll_ioepoch_close(struct inode *inode, struct md_op_data *op_data, | |
747 | struct obd_client_handle **och, unsigned long flags); | |
748 | void ll_done_writing_attr(struct inode *inode, struct md_op_data *op_data); | |
749 | int ll_som_update(struct inode *inode, struct md_op_data *op_data); | |
750 | int ll_inode_getattr(struct inode *inode, struct obdo *obdo, | |
751 | __u64 ioepoch, int sync); | |
752 | int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data, | |
753 | struct md_open_data **mod); | |
754 | void ll_pack_inode2opdata(struct inode *inode, struct md_op_data *op_data, | |
755 | struct lustre_handle *fh); | |
756 | extern void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid, | |
757 | struct ll_file_data *file, loff_t pos, | |
758 | size_t count, int rw); | |
759 | int ll_getattr_it(struct vfsmount *mnt, struct dentry *de, | |
760 | struct lookup_intent *it, struct kstat *stat); | |
761 | int ll_getattr(struct vfsmount *mnt, struct dentry *de, struct kstat *stat); | |
762 | struct ll_file_data *ll_file_data_get(void); | |
763 | struct posix_acl * ll_get_acl(struct inode *inode, int type); | |
764 | ||
765 | int ll_inode_permission(struct inode *inode, int mask); | |
766 | ||
767 | int ll_lov_setstripe_ea_info(struct inode *inode, struct file *file, | |
768 | int flags, struct lov_user_md *lum, | |
769 | int lum_size); | |
770 | int ll_lov_getstripe_ea_info(struct inode *inode, const char *filename, | |
771 | struct lov_mds_md **lmm, int *lmm_size, | |
772 | struct ptlrpc_request **request); | |
773 | int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump, | |
774 | int set_default); | |
775 | int ll_dir_getstripe(struct inode *inode, struct lov_mds_md **lmmp, | |
776 | int *lmm_size, struct ptlrpc_request **request); | |
777 | int ll_fsync(struct file *file, loff_t start, loff_t end, int data); | |
778 | int ll_do_fiemap(struct inode *inode, struct ll_user_fiemap *fiemap, | |
779 | int num_bytes); | |
780 | int ll_merge_lvb(const struct lu_env *env, struct inode *inode); | |
781 | int ll_get_grouplock(struct inode *inode, struct file *file, unsigned long arg); | |
782 | int ll_put_grouplock(struct inode *inode, struct file *file, unsigned long arg); | |
783 | int ll_fid2path(struct inode *inode, void *arg); | |
784 | int ll_data_version(struct inode *inode, __u64 *data_version, int extent_lock); | |
785 | ||
786 | /* llite/dcache.c */ | |
787 | ||
788 | int ll_dops_init(struct dentry *de, int block, int init_sa); | |
789 | extern struct dentry_operations ll_d_ops; | |
790 | void ll_intent_drop_lock(struct lookup_intent *); | |
791 | void ll_intent_release(struct lookup_intent *); | |
792 | void ll_invalidate_aliases(struct inode *); | |
793 | void ll_frob_intent(struct lookup_intent **itp, struct lookup_intent *deft); | |
794 | void ll_lookup_finish_locks(struct lookup_intent *it, struct dentry *dentry); | |
795 | int ll_dcompare(const struct dentry *parent, const struct inode *pinode, | |
796 | const struct dentry *dentry, const struct inode *inode, | |
797 | unsigned int len, const char *str, const struct qstr *d_name); | |
798 | int ll_revalidate_it_finish(struct ptlrpc_request *request, | |
799 | struct lookup_intent *it, struct dentry *de); | |
800 | ||
801 | /* llite/llite_lib.c */ | |
802 | extern struct super_operations lustre_super_operations; | |
803 | ||
804 | char *ll_read_opt(const char *opt, char *data); | |
805 | void ll_lli_init(struct ll_inode_info *lli); | |
806 | int ll_fill_super(struct super_block *sb, struct vfsmount *mnt); | |
807 | void ll_put_super(struct super_block *sb); | |
808 | void ll_kill_super(struct super_block *sb); | |
809 | struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock); | |
810 | struct inode *ll_inode_from_lock(struct ldlm_lock *lock); | |
811 | void ll_clear_inode(struct inode *inode); | |
812 | int ll_setattr_raw(struct dentry *dentry, struct iattr *attr); | |
813 | int ll_setattr(struct dentry *de, struct iattr *attr); | |
814 | int ll_statfs(struct dentry *de, struct kstatfs *sfs); | |
815 | int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs, | |
816 | __u64 max_age, __u32 flags); | |
817 | void ll_update_inode(struct inode *inode, struct lustre_md *md); | |
818 | void ll_read_inode2(struct inode *inode, void *opaque); | |
819 | void ll_delete_inode(struct inode *inode); | |
820 | int ll_iocontrol(struct inode *inode, struct file *file, | |
821 | unsigned int cmd, unsigned long arg); | |
822 | int ll_flush_ctx(struct inode *inode); | |
823 | void ll_umount_begin(struct super_block *sb); | |
824 | int ll_remount_fs(struct super_block *sb, int *flags, char *data); | |
825 | int ll_show_options(struct seq_file *seq, struct dentry *dentry); | |
826 | void ll_dirty_page_discard_warn(struct page *page, int ioret); | |
827 | int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req, | |
828 | struct super_block *, struct lookup_intent *); | |
829 | void lustre_dump_dentry(struct dentry *, int recur); | |
830 | void lustre_dump_inode(struct inode *); | |
831 | int ll_obd_statfs(struct inode *inode, void *arg); | |
832 | int ll_get_max_mdsize(struct ll_sb_info *sbi, int *max_mdsize); | |
833 | int ll_process_config(struct lustre_cfg *lcfg); | |
834 | struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data, | |
835 | struct inode *i1, struct inode *i2, | |
836 | const char *name, int namelen, | |
837 | int mode, __u32 opc, void *data); | |
838 | void ll_finish_md_op_data(struct md_op_data *op_data); | |
839 | int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg); | |
840 | char *ll_get_fsname(struct super_block *sb, char *buf, int buflen); | |
841 | ||
842 | /* llite/llite_nfs.c */ | |
843 | extern struct export_operations lustre_export_operations; | |
844 | __u32 get_uuid2int(const char *name, int len); | |
845 | struct inode *search_inode_for_lustre(struct super_block *sb, | |
846 | const struct lu_fid *fid); | |
847 | ||
848 | /* llite/special.c */ | |
849 | extern struct inode_operations ll_special_inode_operations; | |
850 | extern struct file_operations ll_special_chr_inode_fops; | |
851 | extern struct file_operations ll_special_chr_file_fops; | |
852 | extern struct file_operations ll_special_blk_inode_fops; | |
853 | extern struct file_operations ll_special_fifo_inode_fops; | |
854 | extern struct file_operations ll_special_fifo_file_fops; | |
855 | extern struct file_operations ll_special_sock_inode_fops; | |
856 | ||
857 | /* llite/symlink.c */ | |
858 | extern struct inode_operations ll_fast_symlink_inode_operations; | |
859 | ||
860 | /* llite/llite_close.c */ | |
861 | struct ll_close_queue { | |
862 | spinlock_t lcq_lock; | |
863 | struct list_head lcq_head; | |
864 | wait_queue_head_t lcq_waitq; | |
865 | struct completion lcq_comp; | |
866 | atomic_t lcq_stop; | |
867 | }; | |
868 | ||
869 | struct ccc_object *cl_inode2ccc(struct inode *inode); | |
870 | ||
871 | ||
872 | void vvp_write_pending (struct ccc_object *club, struct ccc_page *page); | |
873 | void vvp_write_complete(struct ccc_object *club, struct ccc_page *page); | |
874 | ||
875 | /* specific achitecture can implement only part of this list */ | |
876 | enum vvp_io_subtype { | |
877 | /** normal IO */ | |
878 | IO_NORMAL, | |
879 | /** io called from .sendfile */ | |
880 | IO_SENDFILE, | |
881 | /** io started from splice_{read|write} */ | |
882 | IO_SPLICE | |
883 | }; | |
884 | ||
885 | /* IO subtypes */ | |
886 | struct vvp_io { | |
887 | /** io subtype */ | |
888 | enum vvp_io_subtype cui_io_subtype; | |
889 | ||
890 | union { | |
891 | struct { | |
892 | read_actor_t cui_actor; | |
893 | void *cui_target; | |
894 | } sendfile; | |
895 | struct { | |
896 | struct pipe_inode_info *cui_pipe; | |
897 | unsigned int cui_flags; | |
898 | } splice; | |
899 | struct vvp_fault_io { | |
900 | /** | |
901 | * Inode modification time that is checked across DLM | |
902 | * lock request. | |
903 | */ | |
904 | time_t ft_mtime; | |
905 | struct vm_area_struct *ft_vma; | |
906 | /** | |
907 | * locked page returned from vvp_io | |
908 | */ | |
909 | struct page *ft_vmpage; | |
910 | struct vm_fault_api { | |
911 | /** | |
912 | * kernel fault info | |
913 | */ | |
914 | struct vm_fault *ft_vmf; | |
915 | /** | |
916 | * fault API used bitflags for return code. | |
917 | */ | |
918 | unsigned int ft_flags; | |
919 | } fault; | |
920 | } fault; | |
921 | } u; | |
922 | /** | |
923 | * Read-ahead state used by read and page-fault IO contexts. | |
924 | */ | |
925 | struct ll_ra_read cui_bead; | |
926 | /** | |
927 | * Set when cui_bead has been initialized. | |
928 | */ | |
929 | int cui_ra_window_set; | |
930 | /** | |
931 | * Partially truncated page, that vvp_io_trunc_start() keeps locked | |
932 | * across truncate. | |
933 | */ | |
934 | struct cl_page *cui_partpage; | |
935 | }; | |
936 | ||
937 | /** | |
938 | * IO arguments for various VFS I/O interfaces. | |
939 | */ | |
940 | struct vvp_io_args { | |
941 | /** normal/sendfile/splice */ | |
942 | enum vvp_io_subtype via_io_subtype; | |
943 | ||
944 | union { | |
945 | struct { | |
946 | struct kiocb *via_iocb; | |
947 | struct iovec *via_iov; | |
948 | unsigned long via_nrsegs; | |
949 | } normal; | |
950 | struct { | |
951 | read_actor_t via_actor; | |
952 | void *via_target; | |
953 | } sendfile; | |
954 | struct { | |
955 | struct pipe_inode_info *via_pipe; | |
956 | unsigned int via_flags; | |
957 | } splice; | |
958 | } u; | |
959 | }; | |
960 | ||
961 | struct ll_cl_context { | |
962 | void *lcc_cookie; | |
963 | struct cl_io *lcc_io; | |
964 | struct cl_page *lcc_page; | |
965 | struct lu_env *lcc_env; | |
966 | int lcc_refcheck; | |
967 | int lcc_created; | |
968 | }; | |
969 | ||
970 | struct vvp_thread_info { | |
971 | struct ost_lvb vti_lvb; | |
972 | struct cl_2queue vti_queue; | |
973 | struct iovec vti_local_iov; | |
974 | struct vvp_io_args vti_args; | |
975 | struct ra_io_arg vti_ria; | |
976 | struct kiocb vti_kiocb; | |
977 | struct ll_cl_context vti_io_ctx; | |
978 | }; | |
979 | ||
980 | static inline struct vvp_thread_info *vvp_env_info(const struct lu_env *env) | |
981 | { | |
982 | extern struct lu_context_key vvp_key; | |
983 | struct vvp_thread_info *info; | |
984 | ||
985 | info = lu_context_key_get(&env->le_ctx, &vvp_key); | |
986 | LASSERT(info != NULL); | |
987 | return info; | |
988 | } | |
989 | ||
990 | static inline struct vvp_io_args *vvp_env_args(const struct lu_env *env, | |
991 | enum vvp_io_subtype type) | |
992 | { | |
993 | struct vvp_io_args *ret = &vvp_env_info(env)->vti_args; | |
994 | ||
995 | ret->via_io_subtype = type; | |
996 | ||
997 | return ret; | |
998 | } | |
999 | ||
1000 | struct vvp_session { | |
1001 | struct vvp_io vs_ios; | |
1002 | }; | |
1003 | ||
1004 | static inline struct vvp_session *vvp_env_session(const struct lu_env *env) | |
1005 | { | |
1006 | extern struct lu_context_key vvp_session_key; | |
1007 | struct vvp_session *ses; | |
1008 | ||
1009 | ses = lu_context_key_get(env->le_ses, &vvp_session_key); | |
1010 | LASSERT(ses != NULL); | |
1011 | return ses; | |
1012 | } | |
1013 | ||
1014 | static inline struct vvp_io *vvp_env_io(const struct lu_env *env) | |
1015 | { | |
1016 | return &vvp_env_session(env)->vs_ios; | |
1017 | } | |
1018 | ||
1019 | void ll_queue_done_writing(struct inode *inode, unsigned long flags); | |
1020 | void ll_close_thread_shutdown(struct ll_close_queue *lcq); | |
1021 | int ll_close_thread_start(struct ll_close_queue **lcq_ret); | |
1022 | ||
1023 | /* llite/llite_mmap.c */ | |
1024 | typedef struct rb_root rb_root_t; | |
1025 | typedef struct rb_node rb_node_t; | |
1026 | ||
1027 | struct ll_lock_tree_node; | |
1028 | struct ll_lock_tree { | |
1029 | rb_root_t lt_root; | |
1030 | struct list_head lt_locked_list; | |
1031 | struct ll_file_data *lt_fd; | |
1032 | }; | |
1033 | ||
1034 | int ll_teardown_mmaps(struct address_space *mapping, __u64 first, __u64 last); | |
1035 | int ll_file_mmap(struct file * file, struct vm_area_struct * vma); | |
1036 | struct ll_lock_tree_node * ll_node_from_inode(struct inode *inode, __u64 start, | |
1037 | __u64 end, ldlm_mode_t mode); | |
1038 | void policy_from_vma(ldlm_policy_data_t *policy, | |
1039 | struct vm_area_struct *vma, unsigned long addr, size_t count); | |
1040 | struct vm_area_struct *our_vma(struct mm_struct *mm, unsigned long addr, | |
1041 | size_t count); | |
1042 | ||
1043 | static inline void ll_invalidate_page(struct page *vmpage) | |
1044 | { | |
1045 | struct address_space *mapping = vmpage->mapping; | |
1046 | loff_t offset = vmpage->index << PAGE_CACHE_SHIFT; | |
1047 | ||
1048 | LASSERT(PageLocked(vmpage)); | |
1049 | if (mapping == NULL) | |
1050 | return; | |
1051 | ||
1052 | ll_teardown_mmaps(mapping, offset, offset + PAGE_CACHE_SIZE); | |
1053 | truncate_complete_page(mapping, vmpage); | |
1054 | } | |
1055 | ||
1056 | #define ll_s2sbi(sb) (s2lsi(sb)->lsi_llsbi) | |
1057 | ||
1058 | /* don't need an addref as the sb_info should be holding one */ | |
1059 | static inline struct obd_export *ll_s2dtexp(struct super_block *sb) | |
1060 | { | |
1061 | return ll_s2sbi(sb)->ll_dt_exp; | |
1062 | } | |
1063 | ||
1064 | /* don't need an addref as the sb_info should be holding one */ | |
1065 | static inline struct obd_export *ll_s2mdexp(struct super_block *sb) | |
1066 | { | |
1067 | return ll_s2sbi(sb)->ll_md_exp; | |
1068 | } | |
1069 | ||
1070 | static inline struct client_obd *sbi2mdc(struct ll_sb_info *sbi) | |
1071 | { | |
1072 | struct obd_device *obd = sbi->ll_md_exp->exp_obd; | |
1073 | if (obd == NULL) | |
1074 | LBUG(); | |
1075 | return &obd->u.cli; | |
1076 | } | |
1077 | ||
1078 | // FIXME: replace the name of this with LL_SB to conform to kernel stuff | |
1079 | static inline struct ll_sb_info *ll_i2sbi(struct inode *inode) | |
1080 | { | |
1081 | return ll_s2sbi(inode->i_sb); | |
1082 | } | |
1083 | ||
1084 | static inline struct obd_export *ll_i2dtexp(struct inode *inode) | |
1085 | { | |
1086 | return ll_s2dtexp(inode->i_sb); | |
1087 | } | |
1088 | ||
1089 | static inline struct obd_export *ll_i2mdexp(struct inode *inode) | |
1090 | { | |
1091 | return ll_s2mdexp(inode->i_sb); | |
1092 | } | |
1093 | ||
1094 | static inline struct lu_fid *ll_inode2fid(struct inode *inode) | |
1095 | { | |
1096 | struct lu_fid *fid; | |
1097 | ||
1098 | LASSERT(inode != NULL); | |
1099 | fid = &ll_i2info(inode)->lli_fid; | |
1100 | ||
1101 | return fid; | |
1102 | } | |
1103 | ||
1104 | static inline int ll_mds_max_easize(struct super_block *sb) | |
1105 | { | |
1106 | return sbi2mdc(ll_s2sbi(sb))->cl_max_mds_easize; | |
1107 | } | |
1108 | ||
1109 | static inline __u64 ll_file_maxbytes(struct inode *inode) | |
1110 | { | |
1111 | return ll_i2info(inode)->lli_maxbytes; | |
1112 | } | |
1113 | ||
1114 | /* llite/xattr.c */ | |
1115 | int ll_setxattr(struct dentry *dentry, const char *name, | |
1116 | const void *value, size_t size, int flags); | |
1117 | ssize_t ll_getxattr(struct dentry *dentry, const char *name, | |
1118 | void *buffer, size_t size); | |
1119 | ssize_t ll_listxattr(struct dentry *dentry, char *buffer, size_t size); | |
1120 | int ll_removexattr(struct dentry *dentry, const char *name); | |
1121 | ||
1122 | /* llite/remote_perm.c */ | |
1123 | extern struct kmem_cache *ll_remote_perm_cachep; | |
1124 | extern struct kmem_cache *ll_rmtperm_hash_cachep; | |
1125 | ||
1126 | struct hlist_head *alloc_rmtperm_hash(void); | |
1127 | void free_rmtperm_hash(struct hlist_head *hash); | |
1128 | int ll_update_remote_perm(struct inode *inode, struct mdt_remote_perm *perm); | |
1129 | int lustre_check_remote_perm(struct inode *inode, int mask); | |
1130 | ||
1131 | /* llite/llite_capa.c */ | |
1132 | extern timer_list_t ll_capa_timer; | |
1133 | ||
1134 | int ll_capa_thread_start(void); | |
1135 | void ll_capa_thread_stop(void); | |
1136 | void ll_capa_timer_callback(unsigned long unused); | |
1137 | ||
1138 | struct obd_capa *ll_add_capa(struct inode *inode, struct obd_capa *ocapa); | |
1139 | int ll_update_capa(struct obd_capa *ocapa, struct lustre_capa *capa); | |
1140 | ||
1141 | void ll_capa_open(struct inode *inode); | |
1142 | void ll_capa_close(struct inode *inode); | |
1143 | ||
1144 | struct obd_capa *ll_mdscapa_get(struct inode *inode); | |
1145 | struct obd_capa *ll_osscapa_get(struct inode *inode, __u64 opc); | |
1146 | ||
1147 | void ll_truncate_free_capa(struct obd_capa *ocapa); | |
1148 | void ll_clear_inode_capas(struct inode *inode); | |
1149 | void ll_print_capa_stat(struct ll_sb_info *sbi); | |
1150 | ||
1151 | /* llite/llite_cl.c */ | |
1152 | extern struct lu_device_type vvp_device_type; | |
1153 | ||
1154 | /** | |
1155 | * Common IO arguments for various VFS I/O interfaces. | |
1156 | */ | |
1157 | int cl_sb_init(struct super_block *sb); | |
1158 | int cl_sb_fini(struct super_block *sb); | |
1159 | enum cl_lock_mode vvp_mode_from_vma(struct vm_area_struct *vma); | |
1160 | void ll_io_init(struct cl_io *io, const struct file *file, int write); | |
1161 | ||
1162 | void ras_update(struct ll_sb_info *sbi, struct inode *inode, | |
1163 | struct ll_readahead_state *ras, unsigned long index, | |
1164 | unsigned hit); | |
1165 | void ll_ra_count_put(struct ll_sb_info *sbi, unsigned long len); | |
1166 | int ll_is_file_contended(struct file *file); | |
1167 | void ll_ra_stats_inc(struct address_space *mapping, enum ra_stat which); | |
1168 | ||
1169 | /* llite/llite_rmtacl.c */ | |
1170 | #ifdef CONFIG_FS_POSIX_ACL | |
1171 | obd_valid rce_ops2valid(int ops); | |
1172 | struct rmtacl_ctl_entry *rct_search(struct rmtacl_ctl_table *rct, pid_t key); | |
1173 | int rct_add(struct rmtacl_ctl_table *rct, pid_t key, int ops); | |
1174 | int rct_del(struct rmtacl_ctl_table *rct, pid_t key); | |
1175 | void rct_init(struct rmtacl_ctl_table *rct); | |
1176 | void rct_fini(struct rmtacl_ctl_table *rct); | |
1177 | ||
1178 | void ee_free(struct eacl_entry *ee); | |
1179 | int ee_add(struct eacl_table *et, pid_t key, struct lu_fid *fid, int type, | |
1180 | ext_acl_xattr_header *header); | |
1181 | struct eacl_entry *et_search_del(struct eacl_table *et, pid_t key, | |
1182 | struct lu_fid *fid, int type); | |
1183 | void et_search_free(struct eacl_table *et, pid_t key); | |
1184 | void et_init(struct eacl_table *et); | |
1185 | void et_fini(struct eacl_table *et); | |
1186 | #endif | |
1187 | ||
1188 | /* statahead.c */ | |
1189 | ||
1190 | #define LL_SA_RPC_MIN 2 | |
1191 | #define LL_SA_RPC_DEF 32 | |
1192 | #define LL_SA_RPC_MAX 8192 | |
1193 | ||
1194 | #define LL_SA_CACHE_BIT 5 | |
1195 | #define LL_SA_CACHE_SIZE (1 << LL_SA_CACHE_BIT) | |
1196 | #define LL_SA_CACHE_MASK (LL_SA_CACHE_SIZE - 1) | |
1197 | ||
1198 | /* per inode struct, for dir only */ | |
1199 | struct ll_statahead_info { | |
1200 | struct inode *sai_inode; | |
1201 | atomic_t sai_refcount; /* when access this struct, hold | |
1202 | * refcount */ | |
1203 | unsigned int sai_generation; /* generation for statahead */ | |
1204 | unsigned int sai_max; /* max ahead of lookup */ | |
1205 | __u64 sai_sent; /* stat requests sent count */ | |
1206 | __u64 sai_replied; /* stat requests which received | |
1207 | * reply */ | |
1208 | __u64 sai_index; /* index of statahead entry */ | |
1209 | __u64 sai_index_wait; /* index of entry which is the | |
1210 | * caller is waiting for */ | |
1211 | __u64 sai_hit; /* hit count */ | |
1212 | __u64 sai_miss; /* miss count: | |
1213 | * for "ls -al" case, it includes | |
1214 | * hidden dentry miss; | |
1215 | * for "ls -l" case, it does not | |
1216 | * include hidden dentry miss. | |
1217 | * "sai_miss_hidden" is used for | |
1218 | * the later case. | |
1219 | */ | |
1220 | unsigned int sai_consecutive_miss; /* consecutive miss */ | |
1221 | unsigned int sai_miss_hidden;/* "ls -al", but first dentry | |
1222 | * is not a hidden one */ | |
1223 | unsigned int sai_skip_hidden;/* skipped hidden dentry count */ | |
1224 | unsigned int sai_ls_all:1, /* "ls -al", do stat-ahead for | |
1225 | * hidden entries */ | |
1226 | sai_in_readpage:1,/* statahead is in readdir()*/ | |
1227 | sai_agl_valid:1;/* AGL is valid for the dir */ | |
1228 | wait_queue_head_t sai_waitq; /* stat-ahead wait queue */ | |
1229 | struct ptlrpc_thread sai_thread; /* stat-ahead thread */ | |
1230 | struct ptlrpc_thread sai_agl_thread; /* AGL thread */ | |
1231 | struct list_head sai_entries; /* entry list */ | |
1232 | struct list_head sai_entries_received; /* entries returned */ | |
1233 | struct list_head sai_entries_stated; /* entries stated */ | |
1234 | struct list_head sai_entries_agl; /* AGL entries to be sent */ | |
1235 | struct list_head sai_cache[LL_SA_CACHE_SIZE]; | |
1236 | spinlock_t sai_cache_lock[LL_SA_CACHE_SIZE]; | |
1237 | atomic_t sai_cache_count; /* entry count in cache */ | |
1238 | }; | |
1239 | ||
1240 | int do_statahead_enter(struct inode *dir, struct dentry **dentry, | |
1241 | int only_unplug); | |
1242 | void ll_stop_statahead(struct inode *dir, void *key); | |
1243 | ||
1244 | static inline int ll_glimpse_size(struct inode *inode) | |
1245 | { | |
1246 | struct ll_inode_info *lli = ll_i2info(inode); | |
1247 | int rc; | |
1248 | ||
1249 | down_read(&lli->lli_glimpse_sem); | |
1250 | rc = cl_glimpse_size(inode); | |
1251 | lli->lli_glimpse_time = cfs_time_current(); | |
1252 | up_read(&lli->lli_glimpse_sem); | |
1253 | return rc; | |
1254 | } | |
1255 | ||
1256 | static inline void | |
1257 | ll_statahead_mark(struct inode *dir, struct dentry *dentry) | |
1258 | { | |
1259 | struct ll_inode_info *lli = ll_i2info(dir); | |
1260 | struct ll_statahead_info *sai = lli->lli_sai; | |
1261 | struct ll_dentry_data *ldd = ll_d2d(dentry); | |
1262 | ||
1263 | /* not the same process, don't mark */ | |
1264 | if (lli->lli_opendir_pid != current_pid()) | |
1265 | return; | |
1266 | ||
1267 | if (sai != NULL && ldd != NULL) | |
1268 | ldd->lld_sa_generation = sai->sai_generation; | |
1269 | } | |
1270 | ||
1271 | static inline int | |
1272 | ll_need_statahead(struct inode *dir, struct dentry *dentryp) | |
1273 | { | |
1274 | struct ll_inode_info *lli; | |
1275 | struct ll_dentry_data *ldd; | |
1276 | ||
1277 | if (ll_i2sbi(dir)->ll_sa_max == 0) | |
1278 | return -EAGAIN; | |
1279 | ||
1280 | lli = ll_i2info(dir); | |
1281 | /* not the same process, don't statahead */ | |
1282 | if (lli->lli_opendir_pid != current_pid()) | |
1283 | return -EAGAIN; | |
1284 | ||
1285 | /* statahead has been stopped */ | |
1286 | if (lli->lli_opendir_key == NULL) | |
1287 | return -EAGAIN; | |
1288 | ||
1289 | ldd = ll_d2d(dentryp); | |
1290 | /* | |
1291 | * When stats a dentry, the system trigger more than once "revalidate" | |
1292 | * or "lookup", for "getattr", for "getxattr", and maybe for others. | |
1293 | * Under patchless client mode, the operation intent is not accurate, | |
1294 | * which maybe misguide the statahead thread. For example: | |
1295 | * The "revalidate" call for "getattr" and "getxattr" of a dentry maybe | |
1296 | * have the same operation intent -- "IT_GETATTR". | |
1297 | * In fact, one dentry should has only one chance to interact with the | |
1298 | * statahead thread, otherwise the statahead windows will be confused. | |
1299 | * The solution is as following: | |
1300 | * Assign "lld_sa_generation" with "sai_generation" when a dentry | |
1301 | * "IT_GETATTR" for the first time, and the subsequent "IT_GETATTR" | |
1302 | * will bypass interacting with statahead thread for checking: | |
1303 | * "lld_sa_generation == lli_sai->sai_generation" | |
1304 | */ | |
1305 | if (ldd && lli->lli_sai && | |
1306 | ldd->lld_sa_generation == lli->lli_sai->sai_generation) | |
1307 | return -EAGAIN; | |
1308 | ||
1309 | return 1; | |
1310 | } | |
1311 | ||
1312 | static inline int | |
1313 | ll_statahead_enter(struct inode *dir, struct dentry **dentryp, int only_unplug) | |
1314 | { | |
1315 | int ret; | |
1316 | ||
1317 | ret = ll_need_statahead(dir, *dentryp); | |
1318 | if (ret <= 0) | |
1319 | return ret; | |
1320 | ||
1321 | return do_statahead_enter(dir, dentryp, only_unplug); | |
1322 | } | |
1323 | ||
1324 | /* llite ioctl register support rountine */ | |
1325 | enum llioc_iter { | |
1326 | LLIOC_CONT = 0, | |
1327 | LLIOC_STOP | |
1328 | }; | |
1329 | ||
1330 | #define LLIOC_MAX_CMD 256 | |
1331 | ||
1332 | /* | |
1333 | * Rules to write a callback function: | |
1334 | * | |
1335 | * Parameters: | |
1336 | * @magic: Dynamic ioctl call routine will feed this vaule with the pointer | |
1337 | * returned to ll_iocontrol_register. Callback functions should use this | |
1338 | * data to check the potential collasion of ioctl cmd. If collasion is | |
1339 | * found, callback function should return LLIOC_CONT. | |
1340 | * @rcp: The result of ioctl command. | |
1341 | * | |
1342 | * Return values: | |
1343 | * If @magic matches the pointer returned by ll_iocontrol_data, the | |
1344 | * callback should return LLIOC_STOP; return LLIOC_STOP otherwise. | |
1345 | */ | |
1346 | typedef enum llioc_iter (*llioc_callback_t)(struct inode *inode, | |
1347 | struct file *file, unsigned int cmd, unsigned long arg, | |
1348 | void *magic, int *rcp); | |
1349 | ||
1350 | enum llioc_iter ll_iocontrol_call(struct inode *inode, struct file *file, | |
1351 | unsigned int cmd, unsigned long arg, int *rcp); | |
1352 | ||
1353 | /* export functions */ | |
1354 | /* Register ioctl block dynamatically for a regular file. | |
1355 | * | |
1356 | * @cmd: the array of ioctl command set | |
1357 | * @count: number of commands in the @cmd | |
1358 | * @cb: callback function, it will be called if an ioctl command is found to | |
1359 | * belong to the command list @cmd. | |
1360 | * | |
1361 | * Return vaule: | |
1362 | * A magic pointer will be returned if success; | |
1363 | * otherwise, NULL will be returned. | |
1364 | * */ | |
1365 | void *ll_iocontrol_register(llioc_callback_t cb, int count, unsigned int *cmd); | |
1366 | void ll_iocontrol_unregister(void *magic); | |
1367 | ||
1368 | ||
1369 | /* lclient compat stuff */ | |
1370 | #define cl_inode_info ll_inode_info | |
1371 | #define cl_i2info(info) ll_i2info(info) | |
1372 | #define cl_inode_mode(inode) ((inode)->i_mode) | |
1373 | #define cl_i2sbi ll_i2sbi | |
1374 | ||
1375 | static inline struct ll_file_data *cl_iattr2fd(struct inode *inode, | |
1376 | const struct iattr *attr) | |
1377 | { | |
1378 | LASSERT(attr->ia_valid & ATTR_FILE); | |
1379 | return LUSTRE_FPRIVATE(attr->ia_file); | |
1380 | } | |
1381 | ||
1382 | static inline void cl_isize_lock(struct inode *inode) | |
1383 | { | |
1384 | ll_inode_size_lock(inode); | |
1385 | } | |
1386 | ||
1387 | static inline void cl_isize_unlock(struct inode *inode) | |
1388 | { | |
1389 | ll_inode_size_unlock(inode); | |
1390 | } | |
1391 | ||
1392 | static inline void cl_isize_write_nolock(struct inode *inode, loff_t kms) | |
1393 | { | |
1394 | LASSERT(down_trylock(&ll_i2info(inode)->lli_size_sem) != 0); | |
1395 | i_size_write(inode, kms); | |
1396 | } | |
1397 | ||
1398 | static inline void cl_isize_write(struct inode *inode, loff_t kms) | |
1399 | { | |
1400 | ll_inode_size_lock(inode); | |
1401 | i_size_write(inode, kms); | |
1402 | ll_inode_size_unlock(inode); | |
1403 | } | |
1404 | ||
1405 | #define cl_isize_read(inode) i_size_read(inode) | |
1406 | ||
1407 | static inline int cl_merge_lvb(const struct lu_env *env, struct inode *inode) | |
1408 | { | |
1409 | return ll_merge_lvb(env, inode); | |
1410 | } | |
1411 | ||
1412 | #define cl_inode_atime(inode) LTIME_S((inode)->i_atime) | |
1413 | #define cl_inode_ctime(inode) LTIME_S((inode)->i_ctime) | |
1414 | #define cl_inode_mtime(inode) LTIME_S((inode)->i_mtime) | |
1415 | ||
1416 | struct obd_capa *cl_capa_lookup(struct inode *inode, enum cl_req_type crt); | |
1417 | ||
1418 | int cl_sync_file_range(struct inode *inode, loff_t start, loff_t end, | |
65fb55d1 | 1419 | enum cl_fsync_mode mode, int ignore_layout); |
d7e09d03 PT |
1420 | |
1421 | /** direct write pages */ | |
1422 | struct ll_dio_pages { | |
1423 | /** page array to be written. we don't support | |
1424 | * partial pages except the last one. */ | |
1425 | struct page **ldp_pages; | |
1426 | /* offset of each page */ | |
1427 | loff_t *ldp_offsets; | |
1428 | /** if ldp_offsets is NULL, it means a sequential | |
1429 | * pages to be written, then this is the file offset | |
1430 | * of the * first page. */ | |
1431 | loff_t ldp_start_offset; | |
1432 | /** how many bytes are to be written. */ | |
1433 | size_t ldp_size; | |
1434 | /** # of pages in the array. */ | |
1435 | int ldp_nr; | |
1436 | }; | |
1437 | ||
1438 | static inline void cl_stats_tally(struct cl_device *dev, enum cl_req_type crt, | |
1439 | int rc) | |
1440 | { | |
1441 | int opc = (crt == CRT_READ) ? LPROC_LL_OSC_READ : | |
1442 | LPROC_LL_OSC_WRITE; | |
1443 | ||
1444 | ll_stats_ops_tally(ll_s2sbi(cl2ccc_dev(dev)->cdv_sb), opc, rc); | |
1445 | } | |
1446 | ||
1447 | extern ssize_t ll_direct_rw_pages(const struct lu_env *env, struct cl_io *io, | |
1448 | int rw, struct inode *inode, | |
1449 | struct ll_dio_pages *pv); | |
1450 | ||
1451 | static inline int ll_file_nolock(const struct file *file) | |
1452 | { | |
1453 | struct ll_file_data *fd = LUSTRE_FPRIVATE(file); | |
1454 | struct inode *inode = file->f_dentry->d_inode; | |
1455 | ||
1456 | LASSERT(fd != NULL); | |
1457 | return ((fd->fd_flags & LL_FILE_IGNORE_LOCK) || | |
1458 | (ll_i2sbi(inode)->ll_flags & LL_SBI_NOLCK)); | |
1459 | } | |
1460 | ||
1461 | static inline void ll_set_lock_data(struct obd_export *exp, struct inode *inode, | |
1462 | struct lookup_intent *it, __u64 *bits) | |
1463 | { | |
1464 | if (!it->d.lustre.it_lock_set) { | |
1465 | struct lustre_handle handle; | |
1466 | ||
1467 | /* If this inode is a remote object, it will get two | |
1468 | * separate locks in different namespaces, Master MDT, | |
1469 | * where the name entry is, will grant LOOKUP lock, | |
1470 | * remote MDT, where the object is, will grant | |
1471 | * UPDATE|PERM lock. The inode will be attched to both | |
1472 | * LOOKUP and PERM locks, so revoking either locks will | |
1473 | * case the dcache being cleared */ | |
1474 | if (it->d.lustre.it_remote_lock_mode) { | |
1475 | handle.cookie = it->d.lustre.it_remote_lock_handle; | |
1476 | CDEBUG(D_DLMTRACE, "setting l_data to inode %p" | |
1477 | "(%lu/%u) for remote lock "LPX64"\n", inode, | |
1478 | inode->i_ino, inode->i_generation, | |
1479 | handle.cookie); | |
1480 | md_set_lock_data(exp, &handle.cookie, inode, NULL); | |
1481 | } | |
1482 | ||
1483 | handle.cookie = it->d.lustre.it_lock_handle; | |
1484 | ||
1485 | CDEBUG(D_DLMTRACE, "setting l_data to inode %p (%lu/%u)" | |
1486 | " for lock "LPX64"\n", inode, inode->i_ino, | |
1487 | inode->i_generation, handle.cookie); | |
1488 | ||
1489 | md_set_lock_data(exp, &handle.cookie, inode, | |
1490 | &it->d.lustre.it_lock_bits); | |
1491 | it->d.lustre.it_lock_set = 1; | |
1492 | } | |
1493 | ||
1494 | if (bits != NULL) | |
1495 | *bits = it->d.lustre.it_lock_bits; | |
1496 | } | |
1497 | ||
1498 | static inline void ll_lock_dcache(struct inode *inode) | |
1499 | { | |
1500 | spin_lock(&inode->i_lock); | |
1501 | } | |
1502 | ||
1503 | static inline void ll_unlock_dcache(struct inode *inode) | |
1504 | { | |
1505 | spin_unlock(&inode->i_lock); | |
1506 | } | |
1507 | ||
1508 | static inline int d_lustre_invalid(const struct dentry *dentry) | |
1509 | { | |
1510 | struct ll_dentry_data *lld = ll_d2d(dentry); | |
1511 | ||
1512 | return (lld == NULL) || lld->lld_invalid; | |
1513 | } | |
1514 | ||
1515 | static inline void __d_lustre_invalidate(struct dentry *dentry) | |
1516 | { | |
1517 | struct ll_dentry_data *lld = ll_d2d(dentry); | |
1518 | ||
1519 | if (lld != NULL) | |
1520 | lld->lld_invalid = 1; | |
1521 | } | |
1522 | ||
1523 | /* | |
1524 | * Mark dentry INVALID, if dentry refcount is zero (this is normally case for | |
1525 | * ll_md_blocking_ast), unhash this dentry, and let dcache to reclaim it later; | |
1526 | * else dput() of the last refcount will unhash this dentry and kill it. | |
1527 | */ | |
b1d2a127 | 1528 | static inline void d_lustre_invalidate(struct dentry *dentry, int nested) |
d7e09d03 PT |
1529 | { |
1530 | CDEBUG(D_DENTRY, "invalidate dentry %.*s (%p) parent %p inode %p " | |
1531 | "refc %d\n", dentry->d_name.len, dentry->d_name.name, dentry, | |
1532 | dentry->d_parent, dentry->d_inode, d_refcount(dentry)); | |
1533 | ||
b1d2a127 PT |
1534 | spin_lock_nested(&dentry->d_lock, |
1535 | nested ? DENTRY_D_LOCK_NESTED : DENTRY_D_LOCK_NORMAL); | |
d7e09d03 PT |
1536 | __d_lustre_invalidate(dentry); |
1537 | if (d_refcount(dentry) == 0) | |
1538 | __d_drop(dentry); | |
1539 | spin_unlock(&dentry->d_lock); | |
1540 | } | |
1541 | ||
1542 | static inline void d_lustre_revalidate(struct dentry *dentry) | |
1543 | { | |
1544 | spin_lock(&dentry->d_lock); | |
1545 | LASSERT(ll_d2d(dentry) != NULL); | |
1546 | ll_d2d(dentry)->lld_invalid = 0; | |
1547 | spin_unlock(&dentry->d_lock); | |
1548 | } | |
1549 | ||
1550 | #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 7, 50, 0) | |
1551 | /* Compatibility for old (1.8) compiled userspace quota code */ | |
1552 | struct if_quotactl_18 { | |
1553 | __u32 qc_cmd; | |
1554 | __u32 qc_type; | |
1555 | __u32 qc_id; | |
1556 | __u32 qc_stat; | |
1557 | struct obd_dqinfo qc_dqinfo; | |
1558 | struct obd_dqblk qc_dqblk; | |
1559 | char obd_type[16]; | |
1560 | struct obd_uuid obd_uuid; | |
1561 | }; | |
1562 | #define LL_IOC_QUOTACTL_18 _IOWR('f', 162, struct if_quotactl_18 *) | |
1563 | /* End compatibility for old (1.8) compiled userspace quota code */ | |
1564 | #else | |
1565 | #warning "remove old LL_IOC_QUOTACTL_18 compatibility code" | |
1566 | #endif /* LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 7, 50, 0) */ | |
1567 | ||
1568 | enum { | |
1569 | LL_LAYOUT_GEN_NONE = ((__u32)-2), /* layout lock was cancelled */ | |
1570 | LL_LAYOUT_GEN_EMPTY = ((__u32)-1) /* for empty layout */ | |
1571 | }; | |
1572 | ||
1573 | int ll_layout_conf(struct inode *inode, const struct cl_object_conf *conf); | |
1574 | int ll_layout_refresh(struct inode *inode, __u32 *gen); | |
1575 | ||
1576 | #endif /* LLITE_INTERNAL_H */ |