2 * Copyright (c) 2011-2016 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@dragonflybsd.org>
6 * by Venkatesh Srinivas <vsrinivas@dragonflybsd.org>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
18 * 3. Neither the name of The DragonFly Project nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific, prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
26 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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30 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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32 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * HAMMER2 IN-MEMORY CACHE OF MEDIA STRUCTURES
39 * This header file contains structures used internally by the HAMMER2
40 * implementation. See hammer2_disk.h for on-disk structures.
42 * There is an in-memory representation of all on-media data structure.
43 * Almost everything is represented by a hammer2_chain structure in-memory.
44 * Other higher-level structures typically map to chains.
46 * A great deal of data is accessed simply via its buffer cache buffer,
47 * which is mapped for the duration of the chain's lock. Hammer2 must
48 * implement its own buffer cache layer on top of the system layer to
49 * allow for different threads to lock different sub-block-sized buffers.
51 * When modifications are made to a chain a new filesystem block must be
52 * allocated. Multiple modifications do not typically allocate new blocks
53 * until the current block has been flushed. Flushes do not block the
54 * front-end unless the front-end operation crosses the current inode being
57 * The in-memory representation may remain cached (for example in order to
58 * placemark clustering locks) even after the related data has been
62 #ifndef _VFS_HAMMER2_HAMMER2_H_
63 #define _VFS_HAMMER2_HAMMER2_H_
65 #include <sys/param.h>
66 #include <sys/types.h>
67 #include <sys/kernel.h>
69 #include <sys/systm.h>
71 #include <sys/malloc.h>
72 #include <sys/mount.h>
73 #include <sys/vnode.h>
75 #include <sys/mountctl.h>
78 #include <sys/thread.h>
79 #include <sys/globaldata.h>
80 #include <sys/lockf.h>
82 #include <sys/queue.h>
83 #include <sys/limits.h>
85 #include <sys/mutex.h>
86 #include <sys/kern_syscall.h>
88 #include <sys/signal2.h>
90 #include <sys/mutex2.h>
91 #include <sys/thread2.h>
93 #include "hammer2_xxhash.h"
94 #include "hammer2_disk.h"
95 #include "hammer2_mount.h"
96 #include "hammer2_ioctl.h"
100 struct hammer2_chain
;
101 struct hammer2_cluster
;
102 struct hammer2_inode
;
106 struct hammer2_state
;
108 struct hammer2_thread
;
112 * Mutex and lock shims. Hammer2 requires support for asynchronous and
113 * abortable locks, and both exclusive and shared spinlocks. Normal
114 * synchronous non-abortable locks can be substituted for spinlocks.
116 typedef mtx_t hammer2_mtx_t
;
117 typedef mtx_link_t hammer2_mtx_link_t
;
118 typedef mtx_state_t hammer2_mtx_state_t
;
120 typedef struct spinlock hammer2_spin_t
;
122 #define hammer2_mtx_ex mtx_lock_ex_quick
123 #define hammer2_mtx_sh mtx_lock_sh_quick
124 #define hammer2_mtx_sh_again mtx_lock_sh_again
125 #define hammer2_mtx_unlock mtx_unlock
126 #define hammer2_mtx_downgrade mtx_downgrade
127 #define hammer2_mtx_owned mtx_owned
128 #define hammer2_mtx_init mtx_init
129 #define hammer2_mtx_temp_release mtx_lock_temp_release
130 #define hammer2_mtx_temp_restore mtx_lock_temp_restore
131 #define hammer2_mtx_refs mtx_lockrefs
133 #define hammer2_spin_init spin_init
134 #define hammer2_spin_sh spin_lock_shared
135 #define hammer2_spin_ex spin_lock
136 #define hammer2_spin_unsh spin_unlock_shared
137 #define hammer2_spin_unex spin_unlock
139 TAILQ_HEAD(hammer2_xop_list
, hammer2_xop_head
);
140 TAILQ_HEAD(hammer2_chain_list
, hammer2_chain
);
142 typedef struct hammer2_xop_list hammer2_xop_list_t
;
146 * General lock support
150 hammer2_mtx_upgrade_try(hammer2_mtx_t
*mtx
)
152 return mtx_upgrade_try(mtx
);
156 * The xid tracks internal transactional updates.
158 * XXX fix-me, really needs to be 64-bits
160 typedef uint32_t hammer2_xid_t
;
162 #define HAMMER2_XID_MIN 0x00000000U
163 #define HAMMER2_XID_MAX 0x7FFFFFFFU
166 * The chain structure tracks a portion of the media topology from the
167 * root (volume) down. Chains represent volumes, inodes, indirect blocks,
168 * data blocks, and freemap nodes and leafs.
170 * The chain structure utilizes a simple singly-homed topology and the
171 * chain's in-memory topology will move around as the chains do, due mainly
172 * to renames and indirect block creation.
174 * Block Table Updates
176 * Block table updates for insertions and updates are delayed until the
177 * flush. This allows us to avoid having to modify the parent chain
178 * all the way to the root.
180 * Block table deletions are performed immediately (modifying the parent
181 * in the process) because the flush code uses the chain structure to
182 * track delayed updates and the chain will be (likely) gone or moved to
183 * another location in the topology after a deletion.
185 * A prior iteration of the code tried to keep the relationship intact
186 * on deletes by doing a delete-duplicate operation on the chain, but
187 * it added way too much complexity to the codebase.
189 * Flush Synchronization
191 * The flush code must flush modified chains bottom-up. Because chain
192 * structures can shift around and are NOT topologically stable,
193 * modified chains are independently indexed for the flush. As the flush
194 * runs it modifies (or further modifies) and updates the parents,
195 * propagating the flush all the way to the volume root.
197 * Modifying front-end operations can occur during a flush but will block
198 * in two cases: (1) when the front-end tries to operate on the inode
199 * currently in the midst of being flushed and (2) if the front-end
200 * crosses an inode currently being flushed (such as during a rename).
201 * So, for example, if you rename directory "x" to "a/b/c/d/e/f/g/x" and
202 * the flusher is currently working on "a/b/c", the rename will block
203 * temporarily in order to ensure that "x" exists in one place or the
206 * Meta-data statistics are updated by the flusher. The front-end will
207 * make estimates but meta-data must be fully synchronized only during a
208 * flush in order to ensure that it remains correct across a crash.
210 * Multiple flush synchronizations can theoretically be in-flight at the
211 * same time but the implementation is not coded to handle the case and
212 * currently serializes them.
216 * Snapshots currently require the subdirectory tree being snapshotted
217 * to be flushed. The snapshot then creates a new super-root inode which
218 * copies the flushed blockdata of the directory or file that was
223 * - Note that the radix tree runs in powers of 2 only so sub-trees
224 * cannot straddle edges.
226 RB_HEAD(hammer2_chain_tree
, hammer2_chain
);
227 TAILQ_HEAD(h2_flush_list
, hammer2_chain
);
228 TAILQ_HEAD(h2_core_list
, hammer2_chain
);
229 TAILQ_HEAD(h2_iocb_list
, hammer2_iocb
);
231 #define CHAIN_CORE_DELETE_BMAP_ENTRIES \
232 (HAMMER2_PBUFSIZE / sizeof(hammer2_blockref_t) / sizeof(uint32_t))
235 * Core topology for chain (embedded in chain). Protected by a spinlock.
237 struct hammer2_chain_core
{
239 struct hammer2_chain_tree rbtree
; /* sub-chains */
240 int live_zero
; /* blockref array opt */
241 u_int live_count
; /* live (not deleted) chains in tree */
242 u_int chain_count
; /* live + deleted chains under core */
243 int generation
; /* generation number (inserts only) */
246 typedef struct hammer2_chain_core hammer2_chain_core_t
;
248 RB_HEAD(hammer2_io_tree
, hammer2_io
);
251 * IOCB - IO callback (into chain, cluster, or manual request)
253 struct hammer2_iocb
{
254 TAILQ_ENTRY(hammer2_iocb
) entry
;
255 void (*callback
)(struct hammer2_iocb
*iocb
);
256 struct hammer2_io
*dio
;
257 struct hammer2_cluster
*cluster
;
258 struct hammer2_chain
*chain
;
267 typedef struct hammer2_iocb hammer2_iocb_t
;
269 #define HAMMER2_IOCB_INTERLOCK 0x00000001
270 #define HAMMER2_IOCB_ONQ 0x00000002
271 #define HAMMER2_IOCB_DONE 0x00000004
272 #define HAMMER2_IOCB_INPROG 0x00000008
273 #define HAMMER2_IOCB_UNUSED10 0x00000010
274 #define HAMMER2_IOCB_QUICK 0x00010000
275 #define HAMMER2_IOCB_ZERO 0x00020000
276 #define HAMMER2_IOCB_READ 0x00040000
277 #define HAMMER2_IOCB_WAKEUP 0x00080000
280 * DIO - Management structure wrapping system buffer cache.
282 * Used for multiple purposes including concurrent management
283 * if small requests by chains into larger DIOs.
286 RB_ENTRY(hammer2_io
) rbnode
; /* indexed by device offset */
287 struct h2_iocb_list iocbq
;
288 struct spinlock spin
;
289 struct hammer2_dev
*hmp
;
294 int act
; /* activity */
295 int btype
; /* approximate BREF_TYPE_* */
299 typedef struct hammer2_io hammer2_io_t
;
301 #define HAMMER2_DIO_INPROG 0x8000000000000000LLU /* bio in progress */
302 #define HAMMER2_DIO_GOOD 0x4000000000000000LLU /* dio->bp is stable */
303 #define HAMMER2_DIO_WAITING 0x2000000000000000LLU /* wait on INPROG */
304 #define HAMMER2_DIO_DIRTY 0x1000000000000000LLU /* flush last drop */
305 #define HAMMER2_DIO_INVALOK 0x0800000000000000LLU /* ok to inval */
306 #define HAMMER2_DIO_INVAL 0x0400000000000000LLU /* inval request */
308 #define HAMMER2_DIO_MASK 0x00FFFFFFFFFFFFFFLLU
310 #define HAMMER2_DIO_INVALBITS (HAMMER2_DIO_INVAL | HAMMER2_DIO_INVALOK)
313 * Primary chain structure keeps track of the topology in-memory.
315 struct hammer2_chain
{
317 hammer2_chain_core_t core
;
318 RB_ENTRY(hammer2_chain
) rbnode
; /* live chain(s) */
319 hammer2_blockref_t bref
;
320 struct hammer2_chain
*parent
;
321 struct hammer2_state
*state
; /* if active cache msg */
322 struct hammer2_dev
*hmp
;
323 struct hammer2_pfs
*pmp
; /* A PFS or super-root (spmp) */
325 hammer2_io_t
*dio
; /* physical data buffer */
326 u_int bytes
; /* physical data size */
330 int error
; /* on-lock data error state */
331 int persist_refs
; /* (aka ip->cluster) */
333 hammer2_media_data_t
*data
; /* data pointer shortcut */
334 TAILQ_ENTRY(hammer2_chain
) flush_node
; /* flush list */
335 TAILQ_ENTRY(hammer2_chain
) lru_node
; /* 0-refs LRU */
338 typedef struct hammer2_chain hammer2_chain_t
;
340 int hammer2_chain_cmp(hammer2_chain_t
*chain1
, hammer2_chain_t
*chain2
);
341 RB_PROTOTYPE(hammer2_chain_tree
, hammer2_chain
, rbnode
, hammer2_chain_cmp
);
344 * Special notes on flags:
346 * INITIAL - This flag allows a chain to be created and for storage to
347 * be allocated without having to immediately instantiate the
348 * related buffer. The data is assumed to be all-zeros. It
349 * is primarily used for indirect blocks.
351 * MODIFIED - The chain's media data has been modified. Prevents chain
352 * free on lastdrop if still in the topology.
354 * UPDATE - Chain might not be modified but parent blocktable needs
355 * an update. Prevents chain free on lastdrop if still in
358 * FICTITIOUS - Faked chain as a placeholder for an error condition. This
359 * chain is unsuitable for I/O.
361 * BMAPPED - Indicates that the chain is present in the parent blockmap.
363 * BMAPUPD - Indicates that the chain is present but needs to be updated
364 * in the parent blockmap.
366 #define HAMMER2_CHAIN_MODIFIED 0x00000001 /* dirty chain data */
367 #define HAMMER2_CHAIN_ALLOCATED 0x00000002 /* kmalloc'd chain */
368 #define HAMMER2_CHAIN_DESTROY 0x00000004
369 #define HAMMER2_CHAIN_DEDUP 0x00000008 /* recorded for dedup */
370 #define HAMMER2_CHAIN_DELETED 0x00000010 /* deleted chain */
371 #define HAMMER2_CHAIN_INITIAL 0x00000020 /* initial create */
372 #define HAMMER2_CHAIN_UPDATE 0x00000040 /* need parent update */
373 #define HAMMER2_CHAIN_DEFERRED 0x00000080 /* flush depth defer */
374 #define HAMMER2_CHAIN_TESTEDGOOD 0x00000100 /* crc tested good */
375 #define HAMMER2_CHAIN_ONFLUSH 0x00000200 /* on a flush list */
376 #define HAMMER2_CHAIN_FICTITIOUS 0x00000400 /* unsuitable for I/O */
377 #define HAMMER2_CHAIN_VOLUMESYNC 0x00000800 /* needs volume sync */
378 #define HAMMER2_CHAIN_DELAYED 0x00001000 /* delayed flush */
379 #define HAMMER2_CHAIN_COUNTEDBREFS 0x00002000 /* block table stats */
380 #define HAMMER2_CHAIN_ONRBTREE 0x00004000 /* on parent RB tree */
381 #define HAMMER2_CHAIN_ONLRU 0x00008000 /* on LRU list */
382 #define HAMMER2_CHAIN_EMBEDDED 0x00010000 /* embedded data */
383 #define HAMMER2_CHAIN_RELEASE 0x00020000 /* don't keep around */
384 #define HAMMER2_CHAIN_BMAPPED 0x00040000 /* present in blkmap */
385 #define HAMMER2_CHAIN_BMAPUPD 0x00080000 /* +needs updating */
386 #define HAMMER2_CHAIN_IOINPROG 0x00100000 /* I/O interlock */
387 #define HAMMER2_CHAIN_IOSIGNAL 0x00200000 /* I/O interlock */
388 #define HAMMER2_CHAIN_PFSBOUNDARY 0x00400000 /* super->pfs inode */
390 #define HAMMER2_CHAIN_FLUSH_MASK (HAMMER2_CHAIN_MODIFIED | \
391 HAMMER2_CHAIN_UPDATE | \
392 HAMMER2_CHAIN_ONFLUSH | \
393 HAMMER2_CHAIN_DESTROY)
396 * Hammer2 error codes, used by chain->error and cluster->error. The error
397 * code is typically set on-lock unless no I/O was requested, and set on
398 * I/O otherwise. If set for a cluster it generally means that the cluster
399 * code could not find a valid copy to present.
401 * IO - An I/O error occurred
402 * CHECK - I/O succeeded but did not match the check code
403 * INCOMPLETE - A cluster is not complete enough to use, or
404 * a chain cannot be loaded because its parent has an error.
406 * NOTE: API allows callers to check zero/non-zero to determine if an error
409 * NOTE: Chain's data field is usually NULL on an IO error but not necessarily
410 * NULL on other errors. Check chain->error, not chain->data.
412 #define HAMMER2_ERROR_NONE 0
413 #define HAMMER2_ERROR_IO 1 /* device I/O error */
414 #define HAMMER2_ERROR_CHECK 2 /* check code mismatch */
415 #define HAMMER2_ERROR_INCOMPLETE 3 /* incomplete cluster */
416 #define HAMMER2_ERROR_DEPTH 4 /* temporary depth limit */
419 * Flags passed to hammer2_chain_lookup() and hammer2_chain_next()
422 * NOLOCK - Input and output chains are referenced only and not
423 * locked. Output chain might be temporarily locked
426 * NODATA - Asks that the chain->data not be resolved in order
429 * NODIRECT - Prevents a lookup of offset 0 in an inode from returning
430 * the inode itself if the inode is in DIRECTDATA mode
431 * (i.e. file is <= 512 bytes). Used by the synchronization
432 * code to prevent confusion.
434 * SHARED - The input chain is expected to be locked shared,
435 * and the output chain is locked shared.
437 * MATCHIND - Allows an indirect block / freemap node to be returned
438 * when the passed key range matches the radix. Remember
439 * that key_end is inclusive (e.g. {0x000,0xFFF},
440 * not {0x000,0x1000}).
442 * (Cannot be used for remote or cluster ops).
444 * ALLNODES - Allows NULL focus.
446 * ALWAYS - Always resolve the data. If ALWAYS and NODATA are both
447 * missing, bulk file data is not resolved but inodes and
448 * other meta-data will.
450 * NOUNLOCK - Used by hammer2_chain_next() to leave the lock on
451 * the input chain intact. The chain is still dropped.
452 * This allows the caller to add a reference to the chain
453 * and retain it in a locked state (used by the
454 * XOP/feed/collect code).
456 #define HAMMER2_LOOKUP_NOLOCK 0x00000001 /* ref only */
457 #define HAMMER2_LOOKUP_NODATA 0x00000002 /* data left NULL */
458 #define HAMMER2_LOOKUP_NODIRECT 0x00000004 /* no offset=0 DD */
459 #define HAMMER2_LOOKUP_SHARED 0x00000100
460 #define HAMMER2_LOOKUP_MATCHIND 0x00000200 /* return all chains */
461 #define HAMMER2_LOOKUP_ALLNODES 0x00000400 /* allow NULL focus */
462 #define HAMMER2_LOOKUP_ALWAYS 0x00000800 /* resolve data */
463 #define HAMMER2_LOOKUP_NOUNLOCK 0x00001000 /* leave lock intact */
466 * Flags passed to hammer2_chain_modify() and hammer2_chain_resize()
468 * NOTE: OPTDATA allows us to avoid instantiating buffers for INDIRECT
469 * blocks in the INITIAL-create state.
471 #define HAMMER2_MODIFY_OPTDATA 0x00000002 /* data can be NULL */
472 #define HAMMER2_MODIFY_NO_MODIFY_TID 0x00000004
473 #define HAMMER2_MODIFY_UNUSED0008 0x00000008
476 * Flags passed to hammer2_chain_lock()
478 * NOTE: RDONLY is set to optimize cluster operations when *no* modifications
479 * will be made to either the cluster being locked or any underlying
480 * cluster. It allows the cluster to lock and access data for a subset
481 * of available nodes instead of all available nodes.
483 #define HAMMER2_RESOLVE_NEVER 1
484 #define HAMMER2_RESOLVE_MAYBE 2
485 #define HAMMER2_RESOLVE_ALWAYS 3
486 #define HAMMER2_RESOLVE_MASK 0x0F
488 #define HAMMER2_RESOLVE_SHARED 0x10 /* request shared lock */
489 #define HAMMER2_RESOLVE_LOCKAGAIN 0x20 /* another shared lock */
490 #define HAMMER2_RESOLVE_RDONLY 0x40 /* higher level op flag */
493 * Flags passed to hammer2_chain_delete()
495 #define HAMMER2_DELETE_PERMANENT 0x0001
498 * Flags passed to hammer2_chain_insert() or hammer2_chain_rename()
500 #define HAMMER2_INSERT_PFSROOT 0x0004
503 * Flags passed to hammer2_chain_delete_duplicate()
505 #define HAMMER2_DELDUP_RECORE 0x0001
508 * Cluster different types of storage together for allocations
510 #define HAMMER2_FREECACHE_INODE 0
511 #define HAMMER2_FREECACHE_INDIR 1
512 #define HAMMER2_FREECACHE_DATA 2
513 #define HAMMER2_FREECACHE_UNUSED3 3
514 #define HAMMER2_FREECACHE_TYPES 4
517 * hammer2_freemap_alloc() block preference
519 #define HAMMER2_OFF_NOPREF ((hammer2_off_t)-1)
522 * BMAP read-ahead maximum parameters
524 #define HAMMER2_BMAP_COUNT 16 /* max bmap read-ahead */
525 #define HAMMER2_BMAP_BYTES (HAMMER2_PBUFSIZE * HAMMER2_BMAP_COUNT)
528 * hammer2_freemap_adjust()
530 #define HAMMER2_FREEMAP_DORECOVER 1
531 #define HAMMER2_FREEMAP_DOMAYFREE 2
532 #define HAMMER2_FREEMAP_DOREALFREE 3
535 * HAMMER2 cluster - A set of chains representing the same entity.
537 * hammer2_cluster typically represents a temporary set of representitive
538 * chains. The one exception is that a hammer2_cluster is embedded in
539 * hammer2_inode. This embedded cluster is ONLY used to track the
540 * representitive chains and cannot be directly locked.
542 * A cluster is usually temporary (and thus per-thread) for locking purposes,
543 * allowing us to embed the asynchronous storage required for cluster
544 * operations in the cluster itself and adjust the state and status without
545 * having to worry too much about SMP issues.
547 * The exception is the cluster embedded in the hammer2_inode structure.
548 * This is used to cache the cluster state on an inode-by-inode basis.
549 * Individual hammer2_chain structures not incorporated into clusters might
550 * also stick around to cache miscellanious elements.
552 * Because the cluster is a 'working copy' and is usually subject to cluster
553 * quorum rules, it is quite possible for us to end up with an insufficient
554 * number of live chains to execute an operation. If an insufficient number
555 * of chains remain in a working copy, the operation may have to be
556 * downgraded, retried, stall until the requisit number of chains are
557 * available, or possibly even error out depending on the mount type.
559 * A cluster's focus is set when it is locked. The focus can only be set
560 * to a chain still part of the synchronized set.
562 #define HAMMER2_MAXCLUSTER 8
563 #define HAMMER2_XOPMASK_CLUSTER ((1U << HAMMER2_MAXCLUSTER) - 1)
564 #define HAMMER2_XOPFIFO 16
565 #define HAMMER2_XOPFIFO_MASK (HAMMER2_XOPFIFO - 1)
566 #define HAMMER2_XOPGROUPS 32
567 #define HAMMER2_XOPGROUPS_MASK (HAMMER2_XOPGROUPS - 1)
568 #define HAMMER2_XOPMASK_VOP 0x80000000U
569 #define HAMMER2_XOPMASK_FIFOW 0x40000000U
571 #define HAMMER2_XOPMASK_ALLDONE (HAMMER2_XOPMASK_VOP | HAMMER2_XOPMASK_CLUSTER)
573 #define HAMMER2_SPECTHREADS 1 /* sync */
575 struct hammer2_cluster_item
{
576 hammer2_chain_t
*chain
;
582 typedef struct hammer2_cluster_item hammer2_cluster_item_t
;
585 * INVALID - Invalid for focus, i.e. not part of synchronized set.
586 * Once set, this bit is sticky across operations.
588 * FEMOD - Indicates that front-end modifying operations can
589 * mess with this entry and MODSYNC will copy also
592 #define HAMMER2_CITEM_INVALID 0x00000001
593 #define HAMMER2_CITEM_FEMOD 0x00000002
594 #define HAMMER2_CITEM_NULL 0x00000004
596 struct hammer2_cluster
{
597 int refs
; /* track for deallocation */
599 struct hammer2_pfs
*pmp
;
602 int error
; /* error code valid on lock */
605 hammer2_chain_t
*focus
; /* current focus (or mod) */
606 hammer2_cluster_item_t array
[HAMMER2_MAXCLUSTER
];
609 typedef struct hammer2_cluster hammer2_cluster_t
;
612 * WRHARD - Hard mounts can write fully synchronized
613 * RDHARD - Hard mounts can read fully synchronized
614 * UNHARD - Unsynchronized masters present
615 * NOHARD - No masters visible
616 * WRSOFT - Soft mounts can write to at least the SOFT_MASTER
617 * RDSOFT - Soft mounts can read from at least a SOFT_SLAVE
618 * UNSOFT - Unsynchronized slaves present
619 * NOSOFT - No slaves visible
620 * RDSLAVE - slaves are accessible (possibly unsynchronized or remote).
621 * MSYNCED - All masters are fully synchronized
622 * SSYNCED - All known local slaves are fully synchronized to masters
624 * All available masters are always incorporated. All PFSs belonging to a
625 * cluster (master, slave, copy, whatever) always try to synchronize the
626 * total number of known masters in the PFSs root inode.
628 * A cluster might have access to many slaves, copies, or caches, but we
629 * have a limited number of cluster slots. Any such elements which are
630 * directly mounted from block device(s) will always be incorporated. Note
631 * that SSYNCED only applies to such elements which are directly mounted,
632 * not to any remote slaves, copies, or caches that could be available. These
633 * bits are used to monitor and drive our synchronization threads.
635 * When asking the question 'is any data accessible at all', then a simple
636 * test against (RDHARD|RDSOFT|RDSLAVE) gives you the answer. If any of
637 * these bits are set the object can be read with certain caveats:
638 * RDHARD - no caveats. RDSOFT - authoritative but might not be synchronized.
639 * and RDSLAVE - not authoritative, has some data but it could be old or
642 * When both soft and hard mounts are available, data will be read and written
643 * via the soft mount only. But all might be in the cluster because
644 * background synchronization threads still need to do their work.
646 #define HAMMER2_CLUSTER_INODE 0x00000001 /* embedded in inode struct */
647 #define HAMMER2_CLUSTER_UNUSED2 0x00000002
648 #define HAMMER2_CLUSTER_LOCKED 0x00000004 /* cluster lks not recursive */
649 #define HAMMER2_CLUSTER_WRHARD 0x00000100 /* hard-mount can write */
650 #define HAMMER2_CLUSTER_RDHARD 0x00000200 /* hard-mount can read */
651 #define HAMMER2_CLUSTER_UNHARD 0x00000400 /* unsynchronized masters */
652 #define HAMMER2_CLUSTER_NOHARD 0x00000800 /* no masters visible */
653 #define HAMMER2_CLUSTER_WRSOFT 0x00001000 /* soft-mount can write */
654 #define HAMMER2_CLUSTER_RDSOFT 0x00002000 /* soft-mount can read */
655 #define HAMMER2_CLUSTER_UNSOFT 0x00004000 /* unsynchronized slaves */
656 #define HAMMER2_CLUSTER_NOSOFT 0x00008000 /* no slaves visible */
657 #define HAMMER2_CLUSTER_MSYNCED 0x00010000 /* all masters synchronized */
658 #define HAMMER2_CLUSTER_SSYNCED 0x00020000 /* known slaves synchronized */
660 #define HAMMER2_CLUSTER_ANYDATA ( HAMMER2_CLUSTER_RDHARD | \
661 HAMMER2_CLUSTER_RDSOFT | \
662 HAMMER2_CLUSTER_RDSLAVE)
664 #define HAMMER2_CLUSTER_RDOK ( HAMMER2_CLUSTER_RDHARD | \
665 HAMMER2_CLUSTER_RDSOFT)
667 #define HAMMER2_CLUSTER_WROK ( HAMMER2_CLUSTER_WRHARD | \
668 HAMMER2_CLUSTER_WRSOFT)
670 #define HAMMER2_CLUSTER_ZFLAGS ( HAMMER2_CLUSTER_WRHARD | \
671 HAMMER2_CLUSTER_RDHARD | \
672 HAMMER2_CLUSTER_WRSOFT | \
673 HAMMER2_CLUSTER_RDSOFT | \
674 HAMMER2_CLUSTER_MSYNCED | \
675 HAMMER2_CLUSTER_SSYNCED)
678 * Helper functions (cluster must be locked for flags to be valid).
682 hammer2_cluster_rdok(hammer2_cluster_t
*cluster
)
684 return (cluster
->flags
& HAMMER2_CLUSTER_RDOK
);
689 hammer2_cluster_wrok(hammer2_cluster_t
*cluster
)
691 return (cluster
->flags
& HAMMER2_CLUSTER_WROK
);
694 RB_HEAD(hammer2_inode_tree
, hammer2_inode
);
699 * NOTE: The inode-embedded cluster is never used directly for I/O (since
700 * it may be shared). Instead it will be replicated-in and synchronized
701 * back out if changed.
703 struct hammer2_inode
{
704 RB_ENTRY(hammer2_inode
) rbnode
; /* inumber lookup (HL) */
705 hammer2_mtx_t lock
; /* inode lock */
706 hammer2_mtx_t truncate_lock
; /* prevent truncates */
707 struct hammer2_pfs
*pmp
; /* PFS mount */
709 struct spinlock cluster_spin
; /* update cluster */
710 hammer2_cluster_t cluster
;
711 struct lockf advlock
;
713 u_int refs
; /* +vpref, +flushref */
714 uint8_t comp_heuristic
;
715 hammer2_inode_meta_t meta
; /* copy of meta-data */
717 hammer2_cluster_t
*cluster_cache
;
720 typedef struct hammer2_inode hammer2_inode_t
;
723 * MODIFIED - Inode is in a modified state, ip->meta may have changes.
724 * RESIZED - Inode truncated (any) or inode extended beyond
727 #define HAMMER2_INODE_MODIFIED 0x0001
728 #define HAMMER2_INODE_SROOT 0x0002 /* kmalloc special case */
729 #define HAMMER2_INODE_RENAME_INPROG 0x0004
730 #define HAMMER2_INODE_ONRBTREE 0x0008
731 #define HAMMER2_INODE_RESIZED 0x0010 /* requires inode_fsync */
732 #define HAMMER2_INODE_ISDELETED 0x0020 /* deleted */
733 #define HAMMER2_INODE_ISUNLINKED 0x0040
734 #define HAMMER2_INODE_METAGOOD 0x0080 /* inode meta-data good */
735 #define HAMMER2_INODE_ONSIDEQ 0x0100 /* on side processing queue */
737 int hammer2_inode_cmp(hammer2_inode_t
*ip1
, hammer2_inode_t
*ip2
);
738 RB_PROTOTYPE2(hammer2_inode_tree
, hammer2_inode
, rbnode
, hammer2_inode_cmp
,
742 * inode-unlink side-structure
744 struct hammer2_inode_sideq
{
745 TAILQ_ENTRY(hammer2_inode_sideq
) entry
;
748 TAILQ_HEAD(h2_sideq_list
, hammer2_inode_sideq
);
750 typedef struct hammer2_inode_sideq hammer2_inode_sideq_t
;
753 * Transaction management sub-structure under hammer2_pfs
755 struct hammer2_trans
{
760 typedef struct hammer2_trans hammer2_trans_t
;
762 #define HAMMER2_TRANS_ISFLUSH 0x80000000 /* flush code */
763 #define HAMMER2_TRANS_BUFCACHE 0x40000000 /* bio strategy */
764 #define HAMMER2_TRANS_PREFLUSH 0x20000000 /* preflush state */
765 #define HAMMER2_TRANS_FPENDING 0x10000000 /* flush pending */
766 #define HAMMER2_TRANS_WAITING 0x08000000 /* someone waiting */
767 #define HAMMER2_TRANS_MASK 0x00FFFFFF /* count mask */
769 #define HAMMER2_FREEMAP_HEUR_NRADIX 4 /* pwr 2 PBUFRADIX-MINIORADIX */
770 #define HAMMER2_FREEMAP_HEUR_TYPES 8
771 #define HAMMER2_FREEMAP_HEUR_SIZE (HAMMER2_FREEMAP_HEUR_NRADIX * \
772 HAMMER2_FREEMAP_HEUR_TYPES)
774 #define HAMMER2_DEDUP_HEUR_SIZE 65536
775 #define HAMMER2_DEDUP_HEUR_MASK (HAMMER2_DEDUP_HEUR_SIZE - 1)
777 #define HAMMER2_FLUSH_TOP 0x0001
778 #define HAMMER2_FLUSH_ALL 0x0002
782 * Hammer2 support thread element.
784 * Potentially many support threads can hang off of hammer2, primarily
785 * off the hammer2_pfs structure. Typically:
787 * td x Nodes A synchronization thread for each node.
788 * td x Nodes x workers Worker threads for frontend operations.
789 * td x 1 Bioq thread for logical buffer writes.
791 * In addition, the synchronization thread(s) associated with the
792 * super-root PFS (spmp) for a node is responsible for automatic bulkfree
795 struct hammer2_thread
{
796 struct hammer2_pfs
*pmp
;
797 hammer2_xop_list_t
*xopq
; /* points into pmp->xopq[] */
801 int clindex
; /* cluster element index */
805 typedef struct hammer2_thread hammer2_thread_t
;
807 #define HAMMER2_THREAD_UNMOUNTING 0x0001 /* unmount request */
808 #define HAMMER2_THREAD_DEV 0x0002 /* related to dev, not pfs */
809 #define HAMMER2_THREAD_WAITING 0x0004 /* thread in idle tsleep */
810 #define HAMMER2_THREAD_REMASTER 0x0008 /* remaster request */
811 #define HAMMER2_THREAD_STOP 0x0010 /* exit request */
812 #define HAMMER2_THREAD_FREEZE 0x0020 /* force idle */
813 #define HAMMER2_THREAD_FROZEN 0x0040 /* thread is frozen */
814 #define HAMMER2_THREAD_XOPQ 0x0080 /* work pending */
815 #define HAMMER2_THREAD_STOPPED 0x0100 /* thread has stopped */
816 #define HAMMER2_THREAD_UNFREEZE 0x0200
817 #define HAMMER2_THREAD_CLIENTWAIT 0x0400
819 #define HAMMER2_THREAD_WAKEUP_MASK (HAMMER2_THREAD_UNMOUNTING | \
820 HAMMER2_THREAD_REMASTER | \
821 HAMMER2_THREAD_STOP | \
822 HAMMER2_THREAD_FREEZE | \
826 * Support structure for dedup heuristic.
828 struct hammer2_dedup
{
829 hammer2_off_t data_off
;
835 typedef struct hammer2_dedup hammer2_dedup_t
;
838 * hammer2_xop - container for VOP/XOP operation (allocated, not on stack).
840 * This structure is used to distribute a VOP operation across multiple
841 * nodes. It provides a rendezvous for concurrent node execution and
842 * can be detached from the frontend operation to allow the frontend to
845 * This structure also sequences operations on up to three inodes.
847 typedef void (*hammer2_xop_func_t
)(union hammer2_xop
*xop
, int clidx
);
849 struct hammer2_xop_fifo
{
850 TAILQ_ENTRY(hammer2_xop_head
) entry
;
851 hammer2_chain_t
*array
[HAMMER2_XOPFIFO
];
852 int errors
[HAMMER2_XOPFIFO
];
858 typedef struct hammer2_xop_fifo hammer2_xop_fifo_t
;
860 #define HAMMER2_XOP_FIFO_RUN 0x0001
861 #define HAMMER2_XOP_FIFO_STALL 0x0002
863 struct hammer2_xop_head
{
864 hammer2_xop_func_t func
;
866 struct hammer2_inode
*ip1
;
867 struct hammer2_inode
*ip2
;
868 struct hammer2_inode
*ip3
;
869 uint32_t check_counter
;
875 hammer2_key_t collect_key
;
880 hammer2_xop_fifo_t collect
[HAMMER2_MAXCLUSTER
];
881 hammer2_cluster_t cluster
; /* help collections */
884 typedef struct hammer2_xop_head hammer2_xop_head_t
;
886 struct hammer2_xop_ipcluster
{
887 hammer2_xop_head_t head
;
890 struct hammer2_xop_strategy
{
891 hammer2_xop_head_t head
;
898 struct hammer2_xop_readdir
{
899 hammer2_xop_head_t head
;
903 struct hammer2_xop_nresolve
{
904 hammer2_xop_head_t head
;
905 hammer2_key_t lhc
; /* if name is NULL used lhc */
908 struct hammer2_xop_nlink
{
909 hammer2_xop_head_t head
;
913 struct hammer2_xop_unlink
{
914 hammer2_xop_head_t head
;
919 struct hammer2_xop_nrename
{
920 hammer2_xop_head_t head
;
925 struct hammer2_xop_scanlhc
{
926 hammer2_xop_head_t head
;
930 struct hammer2_xop_scanall
{
931 hammer2_xop_head_t head
;
932 hammer2_key_t key_beg
; /* inclusive */
933 hammer2_key_t key_end
; /* inclusive */
938 struct hammer2_xop_lookup
{
939 hammer2_xop_head_t head
;
943 struct hammer2_xop_create
{
944 hammer2_xop_head_t head
;
945 hammer2_inode_meta_t meta
; /* initial metadata */
950 struct hammer2_xop_destroy
{
951 hammer2_xop_head_t head
;
954 struct hammer2_xop_fsync
{
955 hammer2_xop_head_t head
;
956 hammer2_inode_meta_t meta
;
959 int clear_directdata
;
962 struct hammer2_xop_unlinkall
{
963 hammer2_xop_head_t head
;
964 hammer2_key_t key_beg
;
965 hammer2_key_t key_end
;
968 struct hammer2_xop_connect
{
969 hammer2_xop_head_t head
;
973 struct hammer2_xop_flush
{
974 hammer2_xop_head_t head
;
977 typedef struct hammer2_xop_readdir hammer2_xop_readdir_t
;
978 typedef struct hammer2_xop_nresolve hammer2_xop_nresolve_t
;
979 typedef struct hammer2_xop_nlink hammer2_xop_nlink_t
;
980 typedef struct hammer2_xop_unlink hammer2_xop_unlink_t
;
981 typedef struct hammer2_xop_nrename hammer2_xop_nrename_t
;
982 typedef struct hammer2_xop_ipcluster hammer2_xop_ipcluster_t
;
983 typedef struct hammer2_xop_strategy hammer2_xop_strategy_t
;
984 typedef struct hammer2_xop_create hammer2_xop_create_t
;
985 typedef struct hammer2_xop_destroy hammer2_xop_destroy_t
;
986 typedef struct hammer2_xop_fsync hammer2_xop_fsync_t
;
987 typedef struct hammer2_xop_unlinkall hammer2_xop_unlinkall_t
;
988 typedef struct hammer2_xop_scanlhc hammer2_xop_scanlhc_t
;
989 typedef struct hammer2_xop_scanall hammer2_xop_scanall_t
;
990 typedef struct hammer2_xop_lookup hammer2_xop_lookup_t
;
991 typedef struct hammer2_xop_connect hammer2_xop_connect_t
;
992 typedef struct hammer2_xop_flush hammer2_xop_flush_t
;
995 hammer2_xop_head_t head
;
996 hammer2_xop_ipcluster_t xop_ipcluster
;
997 hammer2_xop_readdir_t xop_readdir
;
998 hammer2_xop_nresolve_t xop_nresolve
;
999 hammer2_xop_nlink_t xop_nlink
;
1000 hammer2_xop_unlink_t xop_unlink
;
1001 hammer2_xop_nrename_t xop_nrename
;
1002 hammer2_xop_strategy_t xop_strategy
;
1003 hammer2_xop_create_t xop_create
;
1004 hammer2_xop_destroy_t xop_destroy
;
1005 hammer2_xop_fsync_t xop_fsync
;
1006 hammer2_xop_unlinkall_t xop_unlinkall
;
1007 hammer2_xop_scanlhc_t xop_scanlhc
;
1008 hammer2_xop_scanall_t xop_scanall
;
1009 hammer2_xop_lookup_t xop_lookup
;
1010 hammer2_xop_flush_t xop_flush
;
1011 hammer2_xop_connect_t xop_connect
;
1014 typedef union hammer2_xop hammer2_xop_t
;
1017 * hammer2_xop_group - Manage XOP support threads.
1019 struct hammer2_xop_group
{
1020 hammer2_thread_t thrs
[HAMMER2_MAXCLUSTER
];
1023 typedef struct hammer2_xop_group hammer2_xop_group_t
;
1026 * flags to hammer2_xop_collect()
1028 #define HAMMER2_XOP_COLLECT_NOWAIT 0x00000001
1029 #define HAMMER2_XOP_COLLECT_WAITALL 0x00000002
1032 * flags to hammer2_xop_alloc()
1034 * MODIFYING - This is a modifying transaction, allocate a mtid.
1036 #define HAMMER2_XOP_MODIFYING 0x00000001
1037 #define HAMMER2_XOP_ITERATOR 0x00000002
1040 * Global (per partition) management structure, represents a hard block
1041 * device. Typically referenced by hammer2_chain structures when applicable.
1042 * Typically not used for network-managed elements.
1044 * Note that a single hammer2_dev can be indirectly tied to multiple system
1045 * mount points. There is no direct relationship. System mounts are
1046 * per-cluster-id, not per-block-device, and a single hard mount might contain
1047 * many PFSs and those PFSs might combine together in various ways to form
1048 * the set of available clusters.
1050 struct hammer2_dev
{
1051 struct vnode
*devvp
; /* device vnode */
1052 int ronly
; /* read-only mount */
1053 int mount_count
; /* number of actively mounted PFSs */
1054 TAILQ_ENTRY(hammer2_dev
) mntentry
; /* hammer2_mntlist */
1056 struct malloc_type
*mchain
;
1059 kdmsg_iocom_t iocom
; /* volume-level dmsg interface */
1060 struct spinlock io_spin
; /* iotree access */
1061 struct hammer2_io_tree iotree
;
1063 hammer2_chain_t vchain
; /* anchor chain (topology) */
1064 hammer2_chain_t fchain
; /* anchor chain (freemap) */
1065 struct spinlock list_spin
;
1066 struct h2_flush_list flushq
; /* flush seeds */
1067 struct hammer2_pfs
*spmp
; /* super-root pmp for transactions */
1068 struct lock bulklk
; /* bulkfree lock */
1069 struct lock vollk
; /* lockmgr lock */
1070 hammer2_off_t heur_freemap
[HAMMER2_FREEMAP_HEUR_SIZE
];
1071 hammer2_dedup_t heur_dedup
[HAMMER2_DEDUP_HEUR_SIZE
];
1072 int volhdrno
; /* last volhdrno written */
1073 int hflags
; /* HMNT2 flags applicable to device */
1074 char devrepname
[64]; /* for kprintf */
1075 hammer2_volume_data_t voldata
;
1076 hammer2_volume_data_t volsync
; /* synchronized voldata */
1079 typedef struct hammer2_dev hammer2_dev_t
;
1082 * Helper functions (cluster must be locked for flags to be valid).
1086 hammer2_chain_rdok(hammer2_chain_t
*chain
)
1088 return (chain
->error
== 0);
1093 hammer2_chain_wrok(hammer2_chain_t
*chain
)
1095 return (chain
->error
== 0 && chain
->hmp
->ronly
== 0);
1099 * Per-cluster management structure. This structure will be tied to a
1100 * system mount point if the system is mounting the PFS, but is also used
1101 * to manage clusters encountered during the super-root scan or received
1102 * via LNK_SPANs that might not be mounted.
1104 * This structure is also used to represent the super-root that hangs off
1105 * of a hard mount point. The super-root is not really a cluster element.
1106 * In this case the spmp_hmp field will be non-NULL. It's just easier to do
1107 * this than to special case super-root manipulation in the hammer2_chain*
1108 * code as being only hammer2_dev-related.
1110 * pfs_mode and pfs_nmasters are rollup fields which critically describes
1111 * how elements of the cluster act on the cluster. pfs_mode is only applicable
1112 * when a PFS is mounted by the system. pfs_nmasters is our best guess as to
1113 * how many masters have been configured for a cluster and is always
1114 * applicable. pfs_types[] is an array with 1:1 correspondance to the
1115 * iroot cluster and describes the PFS types of the nodes making up the
1118 * WARNING! Portions of this structure have deferred initialization. In
1119 * particular, if not mounted there will be no wthread.
1120 * umounted network PFSs will also be missing iroot and numerous
1121 * other fields will not be initialized prior to mount.
1123 * Synchronization threads are chain-specific and only applicable
1124 * to local hard PFS entries. A hammer2_pfs structure may contain
1125 * more than one when multiple hard PFSs are present on the local
1126 * machine which require synchronization monitoring. Most PFSs
1127 * (such as snapshots) are 1xMASTER PFSs which do not need a
1128 * synchronization thread.
1130 * WARNING! The chains making up pfs->iroot's cluster are accounted for in
1131 * hammer2_dev->mount_count when the pfs is associated with a mount
1134 struct hammer2_pfs
{
1136 TAILQ_ENTRY(hammer2_pfs
) mntentry
; /* hammer2_pfslist */
1138 hammer2_dev_t
*spmp_hmp
; /* only if super-root pmp */
1139 hammer2_dev_t
*force_local
; /* only if 'local' mount */
1140 hammer2_inode_t
*iroot
; /* PFS root inode */
1141 uint8_t pfs_types
[HAMMER2_MAXCLUSTER
];
1142 char *pfs_names
[HAMMER2_MAXCLUSTER
];
1143 hammer2_dev_t
*pfs_hmps
[HAMMER2_MAXCLUSTER
];
1144 hammer2_trans_t trans
;
1145 struct lock lock
; /* PFS lock for certain ops */
1146 struct lock lock_nlink
; /* rename and nlink lock */
1147 struct netexport export
; /* nfs export */
1148 int ronly
; /* read-only mount */
1149 int hflags
; /* pfs-specific mount flags */
1150 struct malloc_type
*minode
;
1151 struct malloc_type
*mmsg
;
1152 struct spinlock inum_spin
; /* inumber lookup */
1153 struct hammer2_inode_tree inum_tree
; /* (not applicable to spmp) */
1154 struct spinlock lru_spin
; /* inumber lookup */
1155 struct hammer2_chain_list lru_list
; /* chains on LRU */
1156 int lru_count
; /* #of chains on LRU */
1157 hammer2_tid_t modify_tid
; /* modify transaction id */
1158 hammer2_tid_t inode_tid
; /* inode allocator */
1159 uint8_t pfs_nmasters
; /* total masters */
1160 uint8_t pfs_mode
; /* operating mode PFSMODE */
1165 uint32_t inmem_dirty_chains
;
1166 int count_lwinprog
; /* logical write in prog */
1167 struct spinlock list_spin
;
1168 struct h2_sideq_list sideq
; /* last-close dirty/unlink */
1169 hammer2_thread_t sync_thrs
[HAMMER2_MAXCLUSTER
];
1170 uint32_t cluster_flags
; /* cached cluster flags */
1171 int has_xop_threads
;
1172 struct spinlock xop_spin
; /* xop sequencer */
1173 hammer2_xop_group_t xop_groups
[HAMMER2_XOPGROUPS
];
1174 hammer2_xop_list_t xopq
[HAMMER2_MAXCLUSTER
][HAMMER2_XOPGROUPS
+
1175 HAMMER2_SPECTHREADS
];
1178 typedef struct hammer2_pfs hammer2_pfs_t
;
1180 #define HAMMER2_LRU_LIMIT 1024 /* per pmp lru_list */
1182 #define HAMMER2_DIRTYCHAIN_WAITING 0x80000000
1183 #define HAMMER2_DIRTYCHAIN_MASK 0x7FFFFFFF
1185 #define HAMMER2_LWINPROG_WAITING 0x80000000
1186 #define HAMMER2_LWINPROG_WAITING0 0x40000000
1187 #define HAMMER2_LWINPROG_MASK 0x3FFFFFFF
1190 * hammer2_cluster_check
1192 #define HAMMER2_CHECK_NULL 0x00000001
1197 #define HAMMER2_BULK_ABORT 0x00000001
1202 #if defined(_KERNEL)
1204 MALLOC_DECLARE(M_HAMMER2
);
1206 #define VTOI(vp) ((hammer2_inode_t *)(vp)->v_data)
1207 #define ITOV(ip) ((ip)->vp)
1210 * Currently locked chains retain the locked buffer cache buffer for
1211 * indirect blocks, and indirect blocks can be one of two sizes. The
1212 * device buffer has to match the case to avoid deadlocking recursive
1213 * chains that might otherwise try to access different offsets within
1214 * the same device buffer.
1218 hammer2_devblkradix(int radix
)
1221 if (radix
<= HAMMER2_LBUFRADIX
) {
1222 return (HAMMER2_LBUFRADIX
);
1224 return (HAMMER2_PBUFRADIX
);
1227 return (HAMMER2_PBUFRADIX
);
1231 * XXX almost time to remove this. DIO uses PBUFSIZE exclusively now.
1235 hammer2_devblksize(size_t bytes
)
1238 if (bytes
<= HAMMER2_LBUFSIZE
) {
1239 return(HAMMER2_LBUFSIZE
);
1241 KKASSERT(bytes
<= HAMMER2_PBUFSIZE
&&
1242 (bytes
^ (bytes
- 1)) == ((bytes
<< 1) - 1));
1243 return (HAMMER2_PBUFSIZE
);
1246 return (HAMMER2_PBUFSIZE
);
1252 MPTOPMP(struct mount
*mp
)
1254 return ((hammer2_pfs_t
*)mp
->mnt_data
);
1257 #define LOCKSTART int __nlocks = curthread->td_locks
1258 #define LOCKENTER (++curthread->td_locks)
1259 #define LOCKEXIT (--curthread->td_locks)
1260 #define LOCKSTOP KKASSERT(curthread->td_locks == __nlocks)
1262 extern struct vop_ops hammer2_vnode_vops
;
1263 extern struct vop_ops hammer2_spec_vops
;
1264 extern struct vop_ops hammer2_fifo_vops
;
1266 extern int hammer2_debug
;
1267 extern int hammer2_cluster_read
;
1268 extern int hammer2_cluster_write
;
1269 extern int hammer2_dedup_enable
;
1270 extern int hammer2_inval_enable
;
1271 extern int hammer2_flush_pipe
;
1272 extern int hammer2_synchronous_flush
;
1273 extern int hammer2_dio_count
;
1274 extern long hammer2_chain_allocs
;
1275 extern long hammer2_chain_frees
;
1276 extern long hammer2_limit_dirty_chains
;
1277 extern long hammer2_count_modified_chains
;
1278 extern long hammer2_iod_invals
;
1279 extern long hammer2_iod_file_read
;
1280 extern long hammer2_iod_meta_read
;
1281 extern long hammer2_iod_indr_read
;
1282 extern long hammer2_iod_fmap_read
;
1283 extern long hammer2_iod_volu_read
;
1284 extern long hammer2_iod_file_write
;
1285 extern long hammer2_iod_file_wembed
;
1286 extern long hammer2_iod_file_wzero
;
1287 extern long hammer2_iod_file_wdedup
;
1288 extern long hammer2_iod_meta_write
;
1289 extern long hammer2_iod_indr_write
;
1290 extern long hammer2_iod_fmap_write
;
1291 extern long hammer2_iod_volu_write
;
1293 extern long hammer2_check_xxhash64
;
1294 extern long hammer2_check_icrc32
;
1296 extern struct objcache
*cache_buffer_read
;
1297 extern struct objcache
*cache_buffer_write
;
1298 extern struct objcache
*cache_xops
;
1303 #define hammer2_icrc32(buf, size) iscsi_crc32((buf), (size))
1304 #define hammer2_icrc32c(buf, size, crc) iscsi_crc32_ext((buf), (size), (crc))
1306 int hammer2_signal_check(time_t *timep
);
1307 const char *hammer2_error_str(int error
);
1309 void hammer2_inode_lock(hammer2_inode_t
*ip
, int how
);
1310 void hammer2_inode_unlock(hammer2_inode_t
*ip
);
1311 hammer2_chain_t
*hammer2_inode_chain(hammer2_inode_t
*ip
, int clindex
, int how
);
1312 hammer2_chain_t
*hammer2_inode_chain_and_parent(hammer2_inode_t
*ip
,
1313 int clindex
, hammer2_chain_t
**parentp
, int how
);
1314 hammer2_mtx_state_t
hammer2_inode_lock_temp_release(hammer2_inode_t
*ip
);
1315 void hammer2_inode_lock_temp_restore(hammer2_inode_t
*ip
,
1316 hammer2_mtx_state_t ostate
);
1317 int hammer2_inode_lock_upgrade(hammer2_inode_t
*ip
);
1318 void hammer2_inode_lock_downgrade(hammer2_inode_t
*ip
, int);
1320 void hammer2_dev_exlock(hammer2_dev_t
*hmp
);
1321 void hammer2_dev_shlock(hammer2_dev_t
*hmp
);
1322 void hammer2_dev_unlock(hammer2_dev_t
*hmp
);
1324 int hammer2_get_dtype(const hammer2_inode_data_t
*ipdata
);
1325 int hammer2_get_vtype(uint8_t type
);
1326 uint8_t hammer2_get_obj_type(enum vtype vtype
);
1327 void hammer2_time_to_timespec(uint64_t xtime
, struct timespec
*ts
);
1328 uint64_t hammer2_timespec_to_time(const struct timespec
*ts
);
1329 uint32_t hammer2_to_unix_xid(const uuid_t
*uuid
);
1330 void hammer2_guid_to_uuid(uuid_t
*uuid
, uint32_t guid
);
1331 void hammer2_trans_manage_init(hammer2_pfs_t
*pmp
);
1333 hammer2_key_t
hammer2_dirhash(const unsigned char *name
, size_t len
);
1334 int hammer2_getradix(size_t bytes
);
1336 int hammer2_calc_logical(hammer2_inode_t
*ip
, hammer2_off_t uoff
,
1337 hammer2_key_t
*lbasep
, hammer2_key_t
*leofp
);
1338 int hammer2_calc_physical(hammer2_inode_t
*ip
, hammer2_key_t lbase
);
1339 void hammer2_update_time(uint64_t *timep
);
1340 void hammer2_adjreadcounter(hammer2_blockref_t
*bref
, size_t bytes
);
1345 struct vnode
*hammer2_igetv(hammer2_inode_t
*ip
, int *errorp
);
1346 hammer2_inode_t
*hammer2_inode_lookup(hammer2_pfs_t
*pmp
,
1347 hammer2_tid_t inum
);
1348 hammer2_inode_t
*hammer2_inode_get(hammer2_pfs_t
*pmp
, hammer2_inode_t
*dip
,
1349 hammer2_cluster_t
*cluster
, int idx
);
1350 void hammer2_inode_free(hammer2_inode_t
*ip
);
1351 void hammer2_inode_ref(hammer2_inode_t
*ip
);
1352 void hammer2_inode_drop(hammer2_inode_t
*ip
);
1353 void hammer2_inode_repoint(hammer2_inode_t
*ip
, hammer2_inode_t
*pip
,
1354 hammer2_cluster_t
*cluster
);
1355 void hammer2_inode_repoint_one(hammer2_inode_t
*ip
, hammer2_cluster_t
*cluster
,
1357 void hammer2_inode_modify(hammer2_inode_t
*ip
);
1358 void hammer2_inode_run_sideq(hammer2_pfs_t
*pmp
);
1360 hammer2_inode_t
*hammer2_inode_create(hammer2_inode_t
*dip
,
1361 hammer2_inode_t
*pip
,
1362 struct vattr
*vap
, struct ucred
*cred
,
1363 const uint8_t *name
, size_t name_len
, hammer2_key_t lhc
,
1364 hammer2_key_t inum
, uint8_t type
, uint8_t target_type
,
1365 int flags
, int *errorp
);
1366 void hammer2_inode_chain_sync(hammer2_inode_t
*ip
);
1367 int hammer2_inode_unlink_finisher(hammer2_inode_t
*ip
, int isopen
);
1372 void hammer2_voldata_lock(hammer2_dev_t
*hmp
);
1373 void hammer2_voldata_unlock(hammer2_dev_t
*hmp
);
1374 void hammer2_voldata_modify(hammer2_dev_t
*hmp
);
1375 hammer2_chain_t
*hammer2_chain_alloc(hammer2_dev_t
*hmp
,
1377 hammer2_blockref_t
*bref
);
1378 void hammer2_chain_core_init(hammer2_chain_t
*chain
);
1379 void hammer2_chain_ref(hammer2_chain_t
*chain
);
1380 void hammer2_chain_ref_hold(hammer2_chain_t
*chain
);
1381 void hammer2_chain_drop(hammer2_chain_t
*chain
);
1382 void hammer2_chain_drop_unhold(hammer2_chain_t
*chain
);
1383 void hammer2_chain_lock(hammer2_chain_t
*chain
, int how
);
1384 void hammer2_chain_lock_unhold(hammer2_chain_t
*chain
, int how
);
1386 void hammer2_chain_push_shared_lock(hammer2_chain_t
*chain
);
1387 void hammer2_chain_pull_shared_lock(hammer2_chain_t
*chain
);
1389 void hammer2_chain_load_data(hammer2_chain_t
*chain
);
1390 const hammer2_media_data_t
*hammer2_chain_rdata(hammer2_chain_t
*chain
);
1391 hammer2_media_data_t
*hammer2_chain_wdata(hammer2_chain_t
*chain
);
1392 int hammer2_chain_snapshot(hammer2_chain_t
*chain
, hammer2_ioc_pfs_t
*pmp
,
1393 hammer2_tid_t mtid
);
1395 int hammer2_chain_hardlink_find(hammer2_chain_t
**parentp
,
1396 hammer2_chain_t
**chainp
,
1397 int clindex
, int flags
);
1398 void hammer2_chain_modify(hammer2_chain_t
*chain
, hammer2_tid_t mtid
,
1399 hammer2_off_t dedup_off
, int flags
);
1400 void hammer2_chain_modify_ip(hammer2_inode_t
*ip
, hammer2_chain_t
*chain
,
1401 hammer2_tid_t mtid
, int flags
);
1402 void hammer2_chain_resize(hammer2_inode_t
*ip
, hammer2_chain_t
*parent
,
1403 hammer2_chain_t
*chain
,
1404 hammer2_tid_t mtid
, hammer2_off_t dedup_off
,
1405 int nradix
, int flags
);
1406 void hammer2_chain_unlock(hammer2_chain_t
*chain
);
1407 void hammer2_chain_unlock_hold(hammer2_chain_t
*chain
);
1408 void hammer2_chain_wait(hammer2_chain_t
*chain
);
1409 hammer2_chain_t
*hammer2_chain_get(hammer2_chain_t
*parent
, int generation
,
1410 hammer2_blockref_t
*bref
);
1411 hammer2_chain_t
*hammer2_chain_lookup_init(hammer2_chain_t
*parent
, int flags
);
1412 void hammer2_chain_lookup_done(hammer2_chain_t
*parent
);
1413 hammer2_chain_t
*hammer2_chain_getparent(hammer2_chain_t
**parentp
, int how
);
1414 hammer2_chain_t
*hammer2_chain_lookup(hammer2_chain_t
**parentp
,
1415 hammer2_key_t
*key_nextp
,
1416 hammer2_key_t key_beg
, hammer2_key_t key_end
,
1417 int *cache_indexp
, int flags
);
1418 hammer2_chain_t
*hammer2_chain_next(hammer2_chain_t
**parentp
,
1419 hammer2_chain_t
*chain
,
1420 hammer2_key_t
*key_nextp
,
1421 hammer2_key_t key_beg
, hammer2_key_t key_end
,
1422 int *cache_indexp
, int flags
);
1423 hammer2_blockref_t
*hammer2_chain_scan(hammer2_chain_t
*parent
,
1424 hammer2_chain_t
**chainp
,
1425 hammer2_blockref_t
*bref
,
1426 int *firstp
, int *cache_indexp
, int flags
);
1428 int hammer2_chain_create(hammer2_chain_t
**parentp
, hammer2_chain_t
**chainp
,
1429 hammer2_pfs_t
*pmp
, int methods
,
1430 hammer2_key_t key
, int keybits
,
1431 int type
, size_t bytes
, hammer2_tid_t mtid
,
1432 hammer2_off_t dedup_off
, int flags
);
1433 void hammer2_chain_rename(hammer2_blockref_t
*bref
,
1434 hammer2_chain_t
**parentp
,
1435 hammer2_chain_t
*chain
,
1436 hammer2_tid_t mtid
, int flags
);
1437 void hammer2_chain_delete(hammer2_chain_t
*parent
, hammer2_chain_t
*chain
,
1438 hammer2_tid_t mtid
, int flags
);
1439 void hammer2_chain_setflush(hammer2_chain_t
*chain
);
1440 void hammer2_chain_countbrefs(hammer2_chain_t
*chain
,
1441 hammer2_blockref_t
*base
, int count
);
1442 hammer2_chain_t
*hammer2_chain_bulksnap(hammer2_chain_t
*chain
);
1443 void hammer2_chain_bulkdrop(hammer2_chain_t
*copy
);
1445 void hammer2_chain_setcheck(hammer2_chain_t
*chain
, void *bdata
);
1446 int hammer2_chain_testcheck(hammer2_chain_t
*chain
, void *bdata
);
1448 void hammer2_pfs_memory_wait(hammer2_pfs_t
*pmp
);
1449 void hammer2_pfs_memory_inc(hammer2_pfs_t
*pmp
);
1450 void hammer2_pfs_memory_wakeup(hammer2_pfs_t
*pmp
);
1452 void hammer2_base_delete(hammer2_chain_t
*chain
,
1453 hammer2_blockref_t
*base
, int count
,
1454 int *cache_indexp
, hammer2_chain_t
*child
);
1455 void hammer2_base_insert(hammer2_chain_t
*chain
,
1456 hammer2_blockref_t
*base
, int count
,
1457 int *cache_indexp
, hammer2_chain_t
*child
);
1462 void hammer2_flush(hammer2_chain_t
*chain
, int istop
);
1463 void hammer2_flush_quick(hammer2_dev_t
*hmp
);
1464 void hammer2_delayed_flush(hammer2_chain_t
*chain
);
1469 void hammer2_trans_init(hammer2_pfs_t
*pmp
, uint32_t flags
);
1470 hammer2_tid_t
hammer2_trans_sub(hammer2_pfs_t
*pmp
);
1471 void hammer2_trans_clear_preflush(hammer2_pfs_t
*pmp
);
1472 void hammer2_trans_done(hammer2_pfs_t
*pmp
);
1473 hammer2_tid_t
hammer2_trans_newinum(hammer2_pfs_t
*pmp
);
1474 void hammer2_trans_assert_strategy(hammer2_pfs_t
*pmp
);
1475 void hammer2_dedup_record(hammer2_chain_t
*chain
, char *data
);
1480 int hammer2_ioctl(hammer2_inode_t
*ip
, u_long com
, void *data
,
1481 int fflag
, struct ucred
*cred
);
1486 void hammer2_io_putblk(hammer2_io_t
**diop
);
1487 void hammer2_io_cleanup(hammer2_dev_t
*hmp
, struct hammer2_io_tree
*tree
);
1488 char *hammer2_io_data(hammer2_io_t
*dio
, off_t lbase
);
1489 hammer2_io_t
*hammer2_io_getquick(hammer2_dev_t
*hmp
, off_t lbase
, int lsize
);
1490 void hammer2_io_resetinval(hammer2_dev_t
*hmp
, off_t lbase
);
1491 void hammer2_io_getblk(hammer2_dev_t
*hmp
, off_t lbase
, int lsize
,
1492 hammer2_iocb_t
*iocb
);
1493 void hammer2_io_complete(hammer2_iocb_t
*iocb
);
1494 void hammer2_io_callback(struct bio
*bio
);
1495 void hammer2_iocb_wait(hammer2_iocb_t
*iocb
);
1496 int hammer2_io_new(hammer2_dev_t
*hmp
, int btype
, off_t lbase
, int lsize
,
1497 hammer2_io_t
**diop
);
1498 int hammer2_io_newnz(hammer2_dev_t
*hmp
, int btype
, off_t lbase
, int lsize
,
1499 hammer2_io_t
**diop
);
1500 void hammer2_io_newq(hammer2_dev_t
*hmp
, int btype
, off_t lbase
, int lsize
);
1501 int hammer2_io_bread(hammer2_dev_t
*hmp
, int btype
, off_t lbase
, int lsize
,
1502 hammer2_io_t
**diop
);
1503 void hammer2_io_bawrite(hammer2_io_t
**diop
);
1504 void hammer2_io_bdwrite(hammer2_io_t
**diop
);
1505 int hammer2_io_bwrite(hammer2_io_t
**diop
);
1506 int hammer2_io_isdirty(hammer2_io_t
*dio
);
1507 void hammer2_io_setdirty(hammer2_io_t
*dio
);
1508 void hammer2_io_setinval(hammer2_io_t
*dio
, hammer2_off_t off
, u_int bytes
);
1509 void hammer2_io_brelse(hammer2_io_t
**diop
);
1510 void hammer2_io_bqrelse(hammer2_io_t
**diop
);
1511 int hammer2_io_crc_good(hammer2_chain_t
*chain
, uint64_t *maskp
);
1512 void hammer2_io_crc_setmask(hammer2_io_t
*dio
, uint64_t mask
);
1513 void hammer2_io_crc_clrmask(hammer2_io_t
*dio
, uint64_t mask
);
1518 void hammer2_thr_signal(hammer2_thread_t
*thr
, uint32_t flags
);
1519 void hammer2_thr_return(hammer2_thread_t
*thr
, uint32_t flags
);
1520 void hammer2_thr_wait(hammer2_thread_t
*thr
, uint32_t flags
);
1521 void hammer2_thr_wait_neg(hammer2_thread_t
*thr
, uint32_t flags
);
1522 void hammer2_thr_create(hammer2_thread_t
*thr
, hammer2_pfs_t
*pmp
,
1523 const char *id
, int clindex
, int repidx
,
1524 void (*func
)(void *arg
));
1525 void hammer2_thr_delete(hammer2_thread_t
*thr
);
1526 void hammer2_thr_remaster(hammer2_thread_t
*thr
);
1527 void hammer2_thr_freeze_async(hammer2_thread_t
*thr
);
1528 void hammer2_thr_freeze(hammer2_thread_t
*thr
);
1529 void hammer2_thr_unfreeze(hammer2_thread_t
*thr
);
1530 int hammer2_thr_break(hammer2_thread_t
*thr
);
1531 void hammer2_primary_xops_thread(void *arg
);
1534 * hammer2_thread.c (XOP API)
1536 void hammer2_xop_group_init(hammer2_pfs_t
*pmp
, hammer2_xop_group_t
*xgrp
);
1537 void *hammer2_xop_alloc(hammer2_inode_t
*ip
, int flags
);
1538 void hammer2_xop_setname(hammer2_xop_head_t
*xop
,
1539 const char *name
, size_t name_len
);
1540 void hammer2_xop_setname2(hammer2_xop_head_t
*xop
,
1541 const char *name
, size_t name_len
);
1542 size_t hammer2_xop_setname_inum(hammer2_xop_head_t
*xop
, hammer2_key_t inum
);
1543 void hammer2_xop_setip2(hammer2_xop_head_t
*xop
, hammer2_inode_t
*ip2
);
1544 void hammer2_xop_setip3(hammer2_xop_head_t
*xop
, hammer2_inode_t
*ip3
);
1545 void hammer2_xop_reinit(hammer2_xop_head_t
*xop
);
1546 void hammer2_xop_helper_create(hammer2_pfs_t
*pmp
);
1547 void hammer2_xop_helper_cleanup(hammer2_pfs_t
*pmp
);
1548 void hammer2_xop_start(hammer2_xop_head_t
*xop
, hammer2_xop_func_t func
);
1549 void hammer2_xop_start_except(hammer2_xop_head_t
*xop
, hammer2_xop_func_t func
,
1551 int hammer2_xop_collect(hammer2_xop_head_t
*xop
, int flags
);
1552 void hammer2_xop_retire(hammer2_xop_head_t
*xop
, uint32_t mask
);
1553 int hammer2_xop_active(hammer2_xop_head_t
*xop
);
1554 int hammer2_xop_feed(hammer2_xop_head_t
*xop
, hammer2_chain_t
*chain
,
1555 int clindex
, int error
);
1560 void hammer2_primary_sync_thread(void *arg
);
1563 * XOP backends in hammer2_xops.c, primarily for VNOPS. Other XOP backends
1564 * may be integrated into other source files.
1566 void hammer2_xop_ipcluster(hammer2_xop_t
*xop
, int clidx
);
1567 void hammer2_xop_readdir(hammer2_xop_t
*xop
, int clidx
);
1568 void hammer2_xop_nresolve(hammer2_xop_t
*xop
, int clidx
);
1569 void hammer2_xop_unlink(hammer2_xop_t
*xop
, int clidx
);
1570 void hammer2_xop_nrename(hammer2_xop_t
*xop
, int clidx
);
1571 void hammer2_xop_nlink(hammer2_xop_t
*xop
, int clidx
);
1572 void hammer2_xop_scanlhc(hammer2_xop_t
*xop
, int clidx
);
1573 void hammer2_xop_scanall(hammer2_xop_t
*xop
, int clidx
);
1574 void hammer2_xop_lookup(hammer2_xop_t
*xop
, int clidx
);
1575 void hammer2_inode_xop_create(hammer2_xop_t
*xop
, int clidx
);
1576 void hammer2_inode_xop_destroy(hammer2_xop_t
*xop
, int clidx
);
1577 void hammer2_inode_xop_chain_sync(hammer2_xop_t
*xop
, int clidx
);
1578 void hammer2_inode_xop_unlinkall(hammer2_xop_t
*xop
, int clidx
);
1579 void hammer2_inode_xop_connect(hammer2_xop_t
*xop
, int clidx
);
1580 void hammer2_inode_xop_flush(hammer2_xop_t
*xop
, int clidx
);
1585 int hammer2_msg_dbg_rcvmsg(kdmsg_msg_t
*msg
);
1586 int hammer2_msg_adhoc_input(kdmsg_msg_t
*msg
);
1591 void hammer2_volconf_update(hammer2_dev_t
*hmp
, int index
);
1592 void hammer2_dump_chain(hammer2_chain_t
*chain
, int tab
, int *countp
, char pfx
);
1593 int hammer2_vfs_sync(struct mount
*mp
, int waitflags
);
1594 hammer2_pfs_t
*hammer2_pfsalloc(hammer2_chain_t
*chain
,
1595 const hammer2_inode_data_t
*ripdata
,
1596 hammer2_tid_t modify_tid
,
1597 hammer2_dev_t
*force_local
);
1598 int hammer2_vfs_vget(struct mount
*mp
, struct vnode
*dvp
,
1599 ino_t ino
, struct vnode
**vpp
);
1601 void hammer2_lwinprog_ref(hammer2_pfs_t
*pmp
);
1602 void hammer2_lwinprog_drop(hammer2_pfs_t
*pmp
);
1603 void hammer2_lwinprog_wait(hammer2_pfs_t
*pmp
, int pipe
);
1608 int hammer2_freemap_alloc(hammer2_chain_t
*chain
, size_t bytes
);
1609 void hammer2_freemap_adjust(hammer2_dev_t
*hmp
,
1610 hammer2_blockref_t
*bref
, int how
);
1615 uint8_t hammer2_cluster_type(hammer2_cluster_t
*cluster
);
1616 const hammer2_media_data_t
*hammer2_cluster_rdata(hammer2_cluster_t
*cluster
);
1617 hammer2_media_data_t
*hammer2_cluster_wdata(hammer2_cluster_t
*cluster
);
1618 hammer2_cluster_t
*hammer2_cluster_from_chain(hammer2_chain_t
*chain
);
1619 void hammer2_cluster_bref(hammer2_cluster_t
*cluster
, hammer2_blockref_t
*bref
);
1620 hammer2_cluster_t
*hammer2_cluster_alloc(hammer2_pfs_t
*pmp
,
1621 hammer2_blockref_t
*bref
);
1622 void hammer2_cluster_ref(hammer2_cluster_t
*cluster
);
1623 void hammer2_cluster_drop(hammer2_cluster_t
*cluster
);
1624 void hammer2_cluster_lock(hammer2_cluster_t
*cluster
, int how
);
1625 int hammer2_cluster_check(hammer2_cluster_t
*cluster
, hammer2_key_t lokey
,
1627 void hammer2_cluster_resolve(hammer2_cluster_t
*cluster
);
1628 void hammer2_cluster_forcegood(hammer2_cluster_t
*cluster
);
1629 hammer2_cluster_t
*hammer2_cluster_copy(hammer2_cluster_t
*ocluster
);
1630 void hammer2_cluster_unlock(hammer2_cluster_t
*cluster
);
1632 int hammer2_bulkfree_pass(hammer2_dev_t
*hmp
,
1633 struct hammer2_ioc_bulkfree
*bfi
);
1638 void hammer2_iocom_init(hammer2_dev_t
*hmp
);
1639 void hammer2_iocom_uninit(hammer2_dev_t
*hmp
);
1640 void hammer2_cluster_reconnect(hammer2_dev_t
*hmp
, struct file
*fp
);
1643 * hammer2_strategy.c
1645 int hammer2_vop_strategy(struct vop_strategy_args
*ap
);
1646 int hammer2_vop_bmap(struct vop_bmap_args
*ap
);
1647 void hammer2_write_thread(void *arg
);
1648 void hammer2_bioq_sync(hammer2_pfs_t
*pmp
);
1649 void hammer2_dedup_clear(hammer2_dev_t
*hmp
);
1651 #endif /* !_KERNEL */
1652 #endif /* !_VFS_HAMMER2_HAMMER2_H_ */