/* * Copyright (c) 2007-2008 The DragonFly Project. All rights reserved. * * This code is derived from software contributed to The DragonFly Project * by Matthew Dillon * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * 3. Neither the name of The DragonFly Project nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific, prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $DragonFly: src/sys/vfs/hammer/hammer.h,v 1.130 2008/11/13 02:18:43 dillon Exp $ */ /* * This header file contains structures used internally by the HAMMERFS * implementation. See hammer_disk.h for on-disk structures. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "hammer_disk.h" #include "hammer_mount.h" #include "hammer_ioctl.h" #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) MALLOC_DECLARE(M_HAMMER); /* * Kernel trace */ #if !defined(KTR_HAMMER) #define KTR_HAMMER KTR_ALL #endif KTR_INFO_MASTER_EXTERN(hammer); /* * Misc structures */ struct hammer_mount; /* * Key structure used for custom RB tree inode lookups. This prototypes * the function hammer_ino_rb_tree_RB_LOOKUP_INFO(root, info). */ typedef struct hammer_inode_info { int64_t obj_id; /* (key) object identifier */ hammer_tid_t obj_asof; /* (key) snapshot transid or 0 */ u_int32_t obj_localization; /* (key) pseudo-fs */ union { struct hammer_btree_leaf_elm *leaf; } u; } *hammer_inode_info_t; typedef enum hammer_transaction_type { HAMMER_TRANS_RO, HAMMER_TRANS_STD, HAMMER_TRANS_FLS } hammer_transaction_type_t; /* * HAMMER Transaction tracking */ struct hammer_transaction { hammer_transaction_type_t type; struct hammer_mount *hmp; hammer_tid_t tid; u_int64_t time; u_int32_t time32; int sync_lock_refs; int flags; struct hammer_volume *rootvol; }; typedef struct hammer_transaction *hammer_transaction_t; #define HAMMER_TRANSF_NEWINODE 0x0001 #define HAMMER_TRANSF_DIDIO 0x0002 #define HAMMER_TRANSF_CRCDOM 0x0004 /* EDOM on CRC error, less critical */ /* * HAMMER locks */ struct hammer_lock { volatile u_int refs; /* active references */ volatile u_int lockval; /* lock count and control bits */ struct thread *lowner; /* owner if exclusively held */ struct thread *rowner; /* owner if exclusively held */ }; #define HAMMER_REFS_LOCKED 0x40000000 /* transition check */ #define HAMMER_REFS_WANTED 0x20000000 /* transition check */ #define HAMMER_REFS_CHECK 0x10000000 /* transition check */ #define HAMMER_REFS_FLAGS (HAMMER_REFS_LOCKED | \ HAMMER_REFS_WANTED | \ HAMMER_REFS_CHECK) #define HAMMER_LOCKF_EXCLUSIVE 0x40000000 #define HAMMER_LOCKF_WANTED 0x20000000 static __inline int hammer_notlocked(struct hammer_lock *lock) { return(lock->lockval == 0); } static __inline int hammer_islocked(struct hammer_lock *lock) { return(lock->lockval != 0); } /* * Returns the number of refs on the object. */ static __inline int hammer_isactive(struct hammer_lock *lock) { return(lock->refs & ~HAMMER_REFS_FLAGS); } static __inline int hammer_oneref(struct hammer_lock *lock) { return((lock->refs & ~HAMMER_REFS_FLAGS) == 1); } static __inline int hammer_norefs(struct hammer_lock *lock) { return((lock->refs & ~HAMMER_REFS_FLAGS) == 0); } static __inline int hammer_norefsorlock(struct hammer_lock *lock) { return(lock->refs == 0); } static __inline int hammer_refsorlock(struct hammer_lock *lock) { return(lock->refs != 0); } /* * Return if we specifically own the lock exclusively. */ static __inline int hammer_lock_excl_owned(struct hammer_lock *lock, thread_t td) { if ((lock->lockval & HAMMER_LOCKF_EXCLUSIVE) && lock->lowner == td) { return(1); } return(0); } /* * Flush state, used by various structures */ typedef enum hammer_inode_state { HAMMER_FST_IDLE, HAMMER_FST_SETUP, HAMMER_FST_FLUSH } hammer_inode_state_t; TAILQ_HEAD(hammer_record_list, hammer_record); /* * Pseudo-filesystem extended data tracking */ struct hammer_pfs_rb_tree; struct hammer_pseudofs_inmem; RB_HEAD(hammer_pfs_rb_tree, hammer_pseudofs_inmem); RB_PROTOTYPE2(hammer_pfs_rb_tree, hammer_pseudofs_inmem, rb_node, hammer_pfs_rb_compare, u_int32_t); struct hammer_pseudofs_inmem { RB_ENTRY(hammer_pseudofs_inmem) rb_node; struct hammer_lock lock; u_int32_t localization; hammer_tid_t create_tid; int flags; udev_t fsid_udev; struct hammer_pseudofs_data pfsd; }; typedef struct hammer_pseudofs_inmem *hammer_pseudofs_inmem_t; #define HAMMER_PFSM_DELETED 0x0001 /* * Cache object ids. A fixed number of objid cache structures are * created to reserve object id's for newly created files in multiples * of 100,000, localized to a particular directory, and recycled as * needed. This allows parallel create operations in different * directories to retain fairly localized object ids which in turn * improves reblocking performance and layout. */ #define OBJID_CACHE_SIZE 1024 #define OBJID_CACHE_BULK_BITS 10 /* 10 bits (1024) */ #define OBJID_CACHE_BULK (32 * 32) /* two level (1024) */ #define OBJID_CACHE_BULK_MASK (OBJID_CACHE_BULK - 1) #define OBJID_CACHE_BULK_MASK64 ((u_int64_t)(OBJID_CACHE_BULK - 1)) typedef struct hammer_objid_cache { TAILQ_ENTRY(hammer_objid_cache) entry; struct hammer_inode *dip; hammer_tid_t base_tid; int count; u_int32_t bm0; u_int32_t bm1[32]; } *hammer_objid_cache_t; /* * Associate an inode with a B-Tree node to cache search start positions */ typedef struct hammer_node_cache { TAILQ_ENTRY(hammer_node_cache) entry; struct hammer_node *node; struct hammer_inode *ip; } *hammer_node_cache_t; TAILQ_HEAD(hammer_node_cache_list, hammer_node_cache); /* * Structure used to organize flush groups. Flush groups must be * organized into chunks in order to avoid blowing out the UNDO FIFO. * Without this a 'sync' could end up flushing 50,000 inodes in a single * transaction. */ struct hammer_fls_rb_tree; RB_HEAD(hammer_fls_rb_tree, hammer_inode); RB_PROTOTYPE(hammer_fls_rb_tree, hammer_inode, rb_flsnode, hammer_ino_rb_compare); struct hammer_flush_group { TAILQ_ENTRY(hammer_flush_group) flush_entry; struct hammer_fls_rb_tree flush_tree; int unused01; int total_count; /* record load */ int running; /* group is running */ int closed; int refs; }; typedef struct hammer_flush_group *hammer_flush_group_t; TAILQ_HEAD(hammer_flush_group_list, hammer_flush_group); /* * Structure used to represent an inode in-memory. * * The record and data associated with an inode may be out of sync with * the disk (xDIRTY flags), or not even on the disk at all (ONDISK flag * clear). * * An inode may also hold a cache of unsynchronized records, used for * database and directories only. Unsynchronized regular file data is * stored in the buffer cache. * * NOTE: A file which is created and destroyed within the initial * synchronization period can wind up not doing any disk I/O at all. * * Finally, an inode may cache numerous disk-referencing B-Tree cursors. */ struct hammer_ino_rb_tree; struct hammer_inode; RB_HEAD(hammer_ino_rb_tree, hammer_inode); RB_PROTOTYPEX(hammer_ino_rb_tree, INFO, hammer_inode, rb_node, hammer_ino_rb_compare, hammer_inode_info_t); struct hammer_redo_rb_tree; RB_HEAD(hammer_redo_rb_tree, hammer_inode); RB_PROTOTYPE2(hammer_redo_rb_tree, hammer_inode, rb_redonode, hammer_redo_rb_compare, hammer_off_t); struct hammer_rec_rb_tree; struct hammer_record; RB_HEAD(hammer_rec_rb_tree, hammer_record); RB_PROTOTYPEX(hammer_rec_rb_tree, INFO, hammer_record, rb_node, hammer_rec_rb_compare, hammer_btree_leaf_elm_t); TAILQ_HEAD(hammer_node_list, hammer_node); struct hammer_inode { RB_ENTRY(hammer_inode) rb_node; hammer_inode_state_t flush_state; hammer_flush_group_t flush_group; RB_ENTRY(hammer_inode) rb_flsnode; /* when on flush list */ RB_ENTRY(hammer_inode) rb_redonode; /* when INODE_RDIRTY is set */ struct hammer_record_list target_list; /* target of dependant recs */ int64_t obj_id; /* (key) object identifier */ hammer_tid_t obj_asof; /* (key) snapshot or 0 */ u_int32_t obj_localization; /* (key) pseudo-fs */ struct hammer_mount *hmp; hammer_objid_cache_t objid_cache; int flags; int error; /* flush error */ int cursor_ip_refs; /* sanity */ int rsv_recs; struct vnode *vp; hammer_pseudofs_inmem_t pfsm; struct lockf advlock; struct hammer_lock lock; /* sync copy interlock */ off_t trunc_off; struct hammer_btree_leaf_elm ino_leaf; /* in-memory cache */ struct hammer_inode_data ino_data; /* in-memory cache */ struct hammer_rec_rb_tree rec_tree; /* in-memory cache */ int rec_generation; struct hammer_node_cache cache[4]; /* search initiate cache */ /* * When a demark is created to synchronize an inode to * disk, certain fields are copied so the front-end VOPs * can continue to run in parallel with the synchronization * occuring in the background. */ int sync_flags; /* to-sync flags cache */ off_t sync_trunc_off; /* to-sync truncation */ off_t save_trunc_off; /* write optimization */ struct hammer_btree_leaf_elm sync_ino_leaf; /* to-sync cache */ struct hammer_inode_data sync_ino_data; /* to-sync cache */ size_t redo_count; /* * Track the earliest offset in the UNDO/REDO FIFO containing * REDO records. This is staged to the backend during flush * sequences. While the inode is staged redo_fifo_next is used * to track the earliest offset for rotation into redo_fifo_start * on completion of the flush. */ hammer_off_t redo_fifo_start; hammer_off_t redo_fifo_next; }; typedef struct hammer_inode *hammer_inode_t; #define VTOI(vp) ((struct hammer_inode *)(vp)->v_data) /* * NOTE: DDIRTY does not include atime or mtime and does not include * write-append size changes. SDIRTY handles write-append size * changes. * * REDO indicates that REDO logging is active, creating a definitive * stream of REDO records in the UNDO/REDO log for writes and * truncations, including boundary records when/if REDO is turned off. * REDO is typically enabled by fsync() and turned off if excessive * writes without an fsync() occurs. * * RDIRTY indicates that REDO records were laid down in the UNDO/REDO * FIFO (even if REDO is turned off some might still be active) and * still being tracked for this inode. See hammer_redo.c */ /* (not including atime/mtime) */ #define HAMMER_INODE_DDIRTY 0x0001 /* in-memory ino_data is dirty */ #define HAMMER_INODE_RSV_INODES 0x0002 /* hmp->rsv_inodes bumped */ #define HAMMER_INODE_CONN_DOWN 0x0004 /* include in downward recursion */ #define HAMMER_INODE_XDIRTY 0x0008 /* in-memory records */ #define HAMMER_INODE_ONDISK 0x0010 /* inode is on-disk (else not yet) */ #define HAMMER_INODE_FLUSH 0x0020 /* flush on last ref */ #define HAMMER_INODE_DELETED 0x0080 /* inode delete (backend) */ #define HAMMER_INODE_DELONDISK 0x0100 /* delete synchronized to disk */ #define HAMMER_INODE_RO 0x0200 /* read-only (because of as-of) */ #define HAMMER_INODE_UNUSED0400 0x0400 #define HAMMER_INODE_DONDISK 0x0800 /* data records may be on disk */ #define HAMMER_INODE_BUFS 0x1000 /* dirty high level bps present */ #define HAMMER_INODE_REFLUSH 0x2000 /* flush on dependancy / reflush */ #define HAMMER_INODE_RECLAIM 0x4000 /* trying to reclaim */ #define HAMMER_INODE_FLUSHW 0x8000 /* Someone waiting for flush */ #define HAMMER_INODE_TRUNCATED 0x00010000 #define HAMMER_INODE_DELETING 0x00020000 /* inode delete request (frontend)*/ #define HAMMER_INODE_RESIGNAL 0x00040000 /* re-signal on re-flush */ #define HAMMER_INODE_ATIME 0x00100000 /* in-memory atime modified */ #define HAMMER_INODE_MTIME 0x00200000 /* in-memory mtime modified */ #define HAMMER_INODE_WOULDBLOCK 0x00400000 /* re-issue to new flush group */ #define HAMMER_INODE_DUMMY 0x00800000 /* dummy inode covering bad file */ #define HAMMER_INODE_SDIRTY 0x01000000 /* in-memory ino_data.size is dirty*/ #define HAMMER_INODE_REDO 0x02000000 /* REDO logging active */ #define HAMMER_INODE_RDIRTY 0x04000000 /* REDO records active in fifo */ #define HAMMER_INODE_MODMASK (HAMMER_INODE_DDIRTY|HAMMER_INODE_SDIRTY| \ HAMMER_INODE_XDIRTY|HAMMER_INODE_BUFS| \ HAMMER_INODE_ATIME|HAMMER_INODE_MTIME| \ HAMMER_INODE_TRUNCATED|HAMMER_INODE_DELETING) #define HAMMER_INODE_MODMASK_NOXDIRTY \ (HAMMER_INODE_MODMASK & ~HAMMER_INODE_XDIRTY) #define HAMMER_INODE_MODMASK_NOREDO \ (HAMMER_INODE_DDIRTY| \ HAMMER_INODE_XDIRTY| \ HAMMER_INODE_TRUNCATED|HAMMER_INODE_DELETING) #define HAMMER_FLUSH_SIGNAL 0x0001 #define HAMMER_FLUSH_RECURSION 0x0002 /* * Used by the inode reclaim code to pipeline reclaims and avoid * blowing out kernel memory or letting the flusher get too far * behind. The reclaim wakes up when count reaches 0 or the * timer expires. */ struct hammer_reclaim { TAILQ_ENTRY(hammer_reclaim) entry; int count; }; #define HAMMER_RECLAIM_WAIT 4000 /* default vfs.hammer.limit_reclaim */ /* * Track who is creating the greatest burden on the * inode cache. */ struct hammer_inostats { pid_t pid; /* track user process */ int ltick; /* last tick */ int count; /* count (degenerates) */ }; #define HAMMER_INOSTATS_HSIZE 32 #define HAMMER_INOSTATS_HMASK (HAMMER_INOSTATS_HSIZE - 1) /* * Structure used to represent an unsynchronized record in-memory. These * records typically represent directory entries. Only non-historical * records are kept in-memory. * * Records are organized as a per-inode RB-Tree. If the inode is not * on disk then neither are any records and the in-memory record tree * represents the entire contents of the inode. If the inode is on disk * then the on-disk B-Tree is scanned in parallel with the in-memory * RB-Tree to synthesize the current state of the file. * * Records are also used to enforce the ordering of directory create/delete * operations. A new inode will not be flushed to disk unless its related * directory entry is also being flushed at the same time. A directory entry * will not be removed unless its related inode is also being removed at the * same time. */ typedef enum hammer_record_type { HAMMER_MEM_RECORD_GENERAL, /* misc record */ HAMMER_MEM_RECORD_INODE, /* inode record */ HAMMER_MEM_RECORD_ADD, /* positive memory cache record */ HAMMER_MEM_RECORD_DEL, /* negative delete-on-disk record */ HAMMER_MEM_RECORD_DATA /* bulk-data record w/on-disk ref */ } hammer_record_type_t; struct hammer_record { RB_ENTRY(hammer_record) rb_node; TAILQ_ENTRY(hammer_record) target_entry; hammer_inode_state_t flush_state; hammer_flush_group_t flush_group; hammer_record_type_t type; struct hammer_lock lock; struct hammer_reserve *resv; struct hammer_inode *ip; struct hammer_inode *target_ip; struct hammer_btree_leaf_elm leaf; union hammer_data_ondisk *data; int flags; hammer_off_t zone2_offset; /* direct-write only */ }; typedef struct hammer_record *hammer_record_t; /* * Record flags. Note that FE can only be set by the frontend if the * record has not been interlocked by the backend w/ BE. */ #define HAMMER_RECF_ALLOCDATA 0x0001 #define HAMMER_RECF_ONRBTREE 0x0002 #define HAMMER_RECF_DELETED_FE 0x0004 /* deleted (frontend) */ #define HAMMER_RECF_DELETED_BE 0x0008 /* deleted (backend) */ #define HAMMER_RECF_COMMITTED 0x0010 /* committed to the B-Tree */ #define HAMMER_RECF_INTERLOCK_BE 0x0020 /* backend interlock */ #define HAMMER_RECF_WANTED 0x0040 /* wanted by the frontend */ #define HAMMER_RECF_CONVERT_DELETE 0x0100 /* special case */ #define HAMMER_RECF_DIRECT_IO 0x0200 /* related direct I/O running*/ #define HAMMER_RECF_DIRECT_WAIT 0x0400 /* related direct I/O running*/ #define HAMMER_RECF_DIRECT_INVAL 0x0800 /* buffer alias invalidation */ #define HAMMER_RECF_REDO 0x1000 /* REDO was laid down */ /* * hammer_create_at_cursor() and hammer_delete_at_cursor() flags. */ #define HAMMER_CREATE_MODE_UMIRROR 0x0001 #define HAMMER_CREATE_MODE_SYS 0x0002 #define HAMMER_DELETE_ADJUST 0x0001 #define HAMMER_DELETE_DESTROY 0x0002 /* * In-memory structures representing on-disk structures. */ struct hammer_volume; struct hammer_buffer; struct hammer_node; struct hammer_undo; struct hammer_reserve; RB_HEAD(hammer_vol_rb_tree, hammer_volume); RB_HEAD(hammer_buf_rb_tree, hammer_buffer); RB_HEAD(hammer_nod_rb_tree, hammer_node); RB_HEAD(hammer_und_rb_tree, hammer_undo); RB_HEAD(hammer_res_rb_tree, hammer_reserve); RB_PROTOTYPE2(hammer_vol_rb_tree, hammer_volume, rb_node, hammer_vol_rb_compare, int32_t); RB_PROTOTYPE2(hammer_buf_rb_tree, hammer_buffer, rb_node, hammer_buf_rb_compare, hammer_off_t); RB_PROTOTYPE2(hammer_nod_rb_tree, hammer_node, rb_node, hammer_nod_rb_compare, hammer_off_t); RB_PROTOTYPE2(hammer_und_rb_tree, hammer_undo, rb_node, hammer_und_rb_compare, hammer_off_t); RB_PROTOTYPE2(hammer_res_rb_tree, hammer_reserve, rb_node, hammer_res_rb_compare, hammer_off_t); /* * IO management - embedded at the head of various in-memory structures * * VOLUME - hammer_volume containing meta-data * META_BUFFER - hammer_buffer containing meta-data * DATA_BUFFER - hammer_buffer containing pure-data * * Dirty volume headers and dirty meta-data buffers are locked until the * flusher can sequence them out. Dirty pure-data buffers can be written. * Clean buffers can be passively released. */ typedef enum hammer_io_type { HAMMER_STRUCTURE_VOLUME, HAMMER_STRUCTURE_META_BUFFER, HAMMER_STRUCTURE_UNDO_BUFFER, HAMMER_STRUCTURE_DATA_BUFFER, HAMMER_STRUCTURE_DUMMY } hammer_io_type_t; union hammer_io_structure; struct hammer_io; struct worklist { LIST_ENTRY(worklist) node; }; TAILQ_HEAD(hammer_io_list, hammer_io); typedef struct hammer_io_list *hammer_io_list_t; struct hammer_io { struct worklist worklist; struct hammer_lock lock; enum hammer_io_type type; struct hammer_mount *hmp; struct hammer_volume *volume; TAILQ_ENTRY(hammer_io) mod_entry; /* list entry if modified */ TAILQ_ENTRY(hammer_io) iorun_entry; /* iorun_list */ hammer_io_list_t mod_list; struct buf *bp; int64_t offset; /* zone-2 offset */ int bytes; /* buffer cache buffer size */ int modify_refs; u_int modified : 1; /* bp's data was modified */ u_int released : 1; /* bp released (w/ B_LOCKED set) */ u_int running : 1; /* bp write IO in progress */ u_int waiting : 1; /* someone is waiting on us */ u_int validated : 1; /* ondisk has been validated */ u_int waitdep : 1; /* flush waits for dependancies */ u_int recovered : 1; /* has recovery ref */ u_int waitmod : 1; /* waiting for modify_refs */ u_int reclaim : 1; /* reclaim requested */ u_int gencrc : 1; /* crc needs to be generated */ u_int ioerror : 1; /* abort on io-error */ }; typedef struct hammer_io *hammer_io_t; #define HAMMER_CLUSTER_SIZE (64 * 1024) #if HAMMER_CLUSTER_SIZE > MAXBSIZE #undef HAMMER_CLUSTER_SIZE #define HAMMER_CLUSTER_SIZE MAXBSIZE #endif #define HAMMER_CLUSTER_BUFS (HAMMER_CLUSTER_SIZE / HAMMER_BUFSIZE) /* * In-memory volume representing on-disk buffer */ struct hammer_volume { struct hammer_io io; RB_ENTRY(hammer_volume) rb_node; struct hammer_volume_ondisk *ondisk; int32_t vol_no; int64_t nblocks; /* note: special calculation for statfs */ int64_t buffer_base; /* base offset of buffer 0 */ hammer_off_t maxbuf_off; /* Maximum buffer offset (zone-2) */ hammer_off_t maxraw_off; /* Maximum raw offset for device */ char *vol_name; struct vnode *devvp; int vol_flags; }; typedef struct hammer_volume *hammer_volume_t; /* * In-memory buffer (other then volume, super-cluster, or cluster), * representing an on-disk buffer. */ struct hammer_buffer { struct hammer_io io; RB_ENTRY(hammer_buffer) rb_node; void *ondisk; hammer_off_t zoneX_offset; hammer_off_t zone2_offset; struct hammer_reserve *resv; struct hammer_node_list clist; }; typedef struct hammer_buffer *hammer_buffer_t; /* * In-memory B-Tree node, representing an on-disk B-Tree node. * * This is a hang-on structure which is backed by a hammer_buffer, * indexed by a hammer_cluster, and used for fine-grained locking of * B-Tree nodes in order to properly control lock ordering. A hammer_buffer * can contain multiple nodes representing wildly disassociated portions * of the B-Tree so locking cannot be done on a buffer-by-buffer basis. * * This structure uses a cluster-relative index to reduce the number * of layers required to access it, and also because all on-disk B-Tree * references are cluster-relative offsets. */ struct hammer_node { struct hammer_lock lock; /* node-by-node lock */ TAILQ_ENTRY(hammer_node) entry; /* per-buffer linkage */ RB_ENTRY(hammer_node) rb_node; /* per-cluster linkage */ hammer_off_t node_offset; /* full offset spec */ struct hammer_mount *hmp; struct hammer_buffer *buffer; /* backing buffer */ hammer_node_ondisk_t ondisk; /* ptr to on-disk structure */ TAILQ_HEAD(, hammer_cursor) cursor_list; /* deadlock recovery */ struct hammer_node_cache_list cache_list; /* passive caches */ int flags; }; #define HAMMER_NODE_DELETED 0x0001 #define HAMMER_NODE_FLUSH 0x0002 #define HAMMER_NODE_CRCGOOD 0x0004 #define HAMMER_NODE_NEEDSCRC 0x0008 #define HAMMER_NODE_NEEDSMIRROR 0x0010 #define HAMMER_NODE_CRCBAD 0x0020 #define HAMMER_NODE_NONLINEAR 0x0040 /* linear heuristic */ #define HAMMER_NODE_CRCANY (HAMMER_NODE_CRCGOOD | HAMMER_NODE_CRCBAD) typedef struct hammer_node *hammer_node_t; /* * List of locked nodes. This structure is used to lock potentially large * numbers of nodes as an aid for complex B-Tree operations. */ struct hammer_node_lock; TAILQ_HEAD(hammer_node_lock_list, hammer_node_lock); struct hammer_node_lock { TAILQ_ENTRY(hammer_node_lock) entry; struct hammer_node_lock_list list; struct hammer_node_lock *parent; hammer_node_t node; hammer_node_ondisk_t copy; /* copy of on-disk data */ int index; /* index of this node in parent */ int count; /* count children */ int flags; }; typedef struct hammer_node_lock *hammer_node_lock_t; #define HAMMER_NODE_LOCK_UPDATED 0x0001 /* * Common I/O management structure - embedded in in-memory structures * which are backed by filesystem buffers. */ union hammer_io_structure { struct hammer_io io; struct hammer_volume volume; struct hammer_buffer buffer; }; typedef union hammer_io_structure *hammer_io_structure_t; /* * The reserve structure prevents the blockmap from allocating * out of a reserved bigblock. Such reservations are used by * the direct-write mechanism. * * The structure is also used to hold off on reallocations of * big blocks from the freemap until flush dependancies have * been dealt with. */ struct hammer_reserve { RB_ENTRY(hammer_reserve) rb_node; TAILQ_ENTRY(hammer_reserve) delay_entry; int flush_group; int flags; int refs; int zone; int append_off; hammer_off_t zone_offset; }; typedef struct hammer_reserve *hammer_reserve_t; #define HAMMER_RESF_ONDELAY 0x0001 #define HAMMER_RESF_LAYER2FREE 0x0002 #include "hammer_cursor.h" /* * The undo structure tracks recent undos to avoid laying down duplicate * undos within a flush group, saving us a significant amount of overhead. * * This is strictly a heuristic. */ #define HAMMER_MAX_UNDOS 1024 #define HAMMER_MAX_FLUSHERS 4 struct hammer_undo { RB_ENTRY(hammer_undo) rb_node; TAILQ_ENTRY(hammer_undo) lru_entry; hammer_off_t offset; int bytes; }; typedef struct hammer_undo *hammer_undo_t; struct hammer_flusher_info; TAILQ_HEAD(hammer_flusher_info_list, hammer_flusher_info); struct hammer_flusher { int signal; /* flusher thread sequencer */ int act; /* currently active flush group */ int done; /* set to act when complete */ int next; /* next flush group */ int group_lock; /* lock sequencing of the next flush */ int exiting; /* request master exit */ thread_t td; /* master flusher thread */ hammer_tid_t tid; /* last flushed transaction id */ int finalize_want; /* serialize finalization */ struct hammer_lock finalize_lock; /* serialize finalization */ struct hammer_transaction trans; /* shared transaction */ struct hammer_flusher_info_list run_list; struct hammer_flusher_info_list ready_list; }; #define HAMMER_FLUSH_UNDOS_RELAXED 0 #define HAMMER_FLUSH_UNDOS_FORCED 1 #define HAMMER_FLUSH_UNDOS_AUTO 2 /* * Internal hammer mount data structure */ struct hammer_mount { struct mount *mp; /*struct vnode *rootvp;*/ struct hammer_ino_rb_tree rb_inos_root; struct hammer_redo_rb_tree rb_redo_root; struct hammer_vol_rb_tree rb_vols_root; struct hammer_nod_rb_tree rb_nods_root; struct hammer_und_rb_tree rb_undo_root; struct hammer_res_rb_tree rb_resv_root; struct hammer_buf_rb_tree rb_bufs_root; struct hammer_pfs_rb_tree rb_pfsm_root; struct hammer_volume *rootvol; struct hammer_base_elm root_btree_beg; struct hammer_base_elm root_btree_end; struct malloc_type *m_misc; struct malloc_type *m_inodes; int flags; /* HAMMER_MOUNT_xxx flags */ int hflags; int ronly; int nvolumes; int volume_iterator; int master_id; /* -1 or 0-15 - clustering and mirroring */ int version; /* hammer filesystem version to use */ int rsv_inodes; /* reserved space due to dirty inodes */ int64_t rsv_databytes; /* reserved space due to record data */ int rsv_recs; /* reserved space due to dirty records */ int rsv_fromdelay; /* bigblocks reserved due to flush delay */ int undo_rec_limit; /* based on size of undo area */ int last_newrecords; int count_newrecords; int volume_to_remove; /* volume that is currently being removed */ int inode_reclaims; /* inodes pending reclaim by flusher */ int count_inodes; /* total number of inodes */ int count_iqueued; /* inodes queued to flusher */ struct hammer_flusher flusher; u_int check_interrupt; u_int check_yield; uuid_t fsid; struct hammer_io_list volu_list; /* dirty undo buffers */ struct hammer_io_list undo_list; /* dirty undo buffers */ struct hammer_io_list data_list; /* dirty data buffers */ struct hammer_io_list alt_data_list; /* dirty data buffers */ struct hammer_io_list meta_list; /* dirty meta bufs */ struct hammer_io_list lose_list; /* loose buffers */ int locked_dirty_space; /* meta/volu count */ int io_running_space; int objid_cache_count; int error; /* critical I/O error */ struct krate krate; /* rate limited kprintf */ hammer_tid_t asof; /* snapshot mount */ hammer_tid_t next_tid; hammer_tid_t flush_tid1; /* flusher tid sequencing */ hammer_tid_t flush_tid2; /* flusher tid sequencing */ int64_t copy_stat_freebigblocks; /* number of free bigblocks */ u_int32_t undo_seqno; /* UNDO/REDO FIFO seqno */ struct netexport export; struct hammer_lock sync_lock; struct hammer_lock free_lock; struct hammer_lock undo_lock; struct hammer_lock blkmap_lock; struct hammer_lock snapshot_lock; struct hammer_lock volume_lock; struct hammer_blockmap blockmap[HAMMER_MAX_ZONES]; struct hammer_undo undos[HAMMER_MAX_UNDOS]; int undo_alloc; TAILQ_HEAD(, hammer_undo) undo_lru_list; TAILQ_HEAD(, hammer_reserve) delay_list; struct hammer_flush_group_list flush_group_list; hammer_flush_group_t next_flush_group; TAILQ_HEAD(, hammer_objid_cache) objid_cache_list; TAILQ_HEAD(, hammer_reclaim) reclaim_list; TAILQ_HEAD(, hammer_io) iorun_list; struct hammer_inostats inostats[HAMMER_INOSTATS_HSIZE]; }; typedef struct hammer_mount *hammer_mount_t; #define HAMMER_MOUNT_CRITICAL_ERROR 0x0001 #define HAMMER_MOUNT_FLUSH_RECOVERY 0x0002 #define HAMMER_MOUNT_REDO_SYNC 0x0004 struct hammer_sync_info { int error; int waitfor; }; /* * Minium buffer cache bufs required to rebalance the B-Tree. * This is because we must hold the children and the children's children * locked. Even this might not be enough if things are horribly out * of balance. */ #define HAMMER_REBALANCE_MIN_BUFS \ (HAMMER_BTREE_LEAF_ELMS * HAMMER_BTREE_LEAF_ELMS) #endif /* * checkspace slop (8MB chunks), higher numbers are more conservative. */ #define HAMMER_CHKSPC_REBLOCK 25 #define HAMMER_CHKSPC_MIRROR 20 #define HAMMER_CHKSPC_WRITE 20 #define HAMMER_CHKSPC_CREATE 20 #define HAMMER_CHKSPC_REMOVE 10 #define HAMMER_CHKSPC_EMERGENCY 0 #if defined(_KERNEL) extern struct vop_ops hammer_vnode_vops; extern struct vop_ops hammer_spec_vops; extern struct vop_ops hammer_fifo_vops; extern struct bio_ops hammer_bioops; extern int hammer_debug_io; extern int hammer_debug_general; extern int hammer_debug_debug; extern int hammer_debug_inode; extern int hammer_debug_locks; extern int hammer_debug_btree; extern int hammer_debug_tid; extern int hammer_debug_recover; extern int hammer_debug_recover_faults; extern int hammer_debug_critical; extern int hammer_cluster_enable; extern int hammer_count_fsyncs; extern int hammer_count_inodes; extern int hammer_count_iqueued; extern int hammer_count_reclaiming; extern int hammer_count_records; extern int hammer_count_record_datas; extern int hammer_count_volumes; extern int hammer_count_buffers; extern int hammer_count_nodes; extern int64_t hammer_count_extra_space_used; extern int64_t hammer_stats_btree_lookups; extern int64_t hammer_stats_btree_searches; extern int64_t hammer_stats_btree_inserts; extern int64_t hammer_stats_btree_deletes; extern int64_t hammer_stats_btree_elements; extern int64_t hammer_stats_btree_splits; extern int64_t hammer_stats_btree_iterations; extern int64_t hammer_stats_btree_root_iterations; extern int64_t hammer_stats_record_iterations; extern int64_t hammer_stats_file_read; extern int64_t hammer_stats_file_write; extern int64_t hammer_stats_file_iopsr; extern int64_t hammer_stats_file_iopsw; extern int64_t hammer_stats_disk_read; extern int64_t hammer_stats_disk_write; extern int64_t hammer_stats_inode_flushes; extern int64_t hammer_stats_commits; extern int64_t hammer_stats_undo; extern int64_t hammer_stats_redo; extern int hammer_count_dirtybufspace; extern int hammer_count_refedbufs; extern int hammer_count_reservations; extern int hammer_count_io_running_read; extern int hammer_count_io_running_write; extern int hammer_count_io_locked; extern int hammer_limit_dirtybufspace; extern int hammer_limit_recs; extern int hammer_limit_inode_recs; extern int hammer_limit_reclaim; extern int hammer_limit_redo; extern int hammer_bio_count; extern int hammer_verify_zone; extern int hammer_verify_data; extern int hammer_write_mode; extern int hammer_yield_check; extern int hammer_fsync_mode; extern int hammer_autoflush; extern int64_t hammer_contention_count; void hammer_critical_error(hammer_mount_t hmp, hammer_inode_t ip, int error, const char *msg); int hammer_vop_inactive(struct vop_inactive_args *); int hammer_vop_reclaim(struct vop_reclaim_args *); int hammer_get_vnode(struct hammer_inode *ip, struct vnode **vpp); struct hammer_inode *hammer_get_inode(hammer_transaction_t trans, hammer_inode_t dip, int64_t obj_id, hammer_tid_t asof, u_int32_t localization, int flags, int *errorp); struct hammer_inode *hammer_get_dummy_inode(hammer_transaction_t trans, hammer_inode_t dip, int64_t obj_id, hammer_tid_t asof, u_int32_t localization, int flags, int *errorp); struct hammer_inode *hammer_find_inode(hammer_transaction_t trans, int64_t obj_id, hammer_tid_t asof, u_int32_t localization); void hammer_scan_inode_snapshots(hammer_mount_t hmp, hammer_inode_info_t iinfo, int (*callback)(hammer_inode_t ip, void *data), void *data); void hammer_put_inode(struct hammer_inode *ip); void hammer_put_inode_ref(struct hammer_inode *ip); void hammer_inode_waitreclaims(hammer_transaction_t trans); int hammer_unload_volume(hammer_volume_t volume, void *data __unused); int hammer_adjust_volume_mode(hammer_volume_t volume, void *data __unused); int hammer_unload_buffer(hammer_buffer_t buffer, void *data); int hammer_install_volume(hammer_mount_t hmp, const char *volname, struct vnode *devvp); int hammer_mountcheck_volumes(hammer_mount_t hmp); int hammer_mem_add(hammer_record_t record); int hammer_ip_lookup(hammer_cursor_t cursor); int hammer_ip_first(hammer_cursor_t cursor); int hammer_ip_next(hammer_cursor_t cursor); int hammer_ip_resolve_data(hammer_cursor_t cursor); int hammer_ip_delete_record(hammer_cursor_t cursor, hammer_inode_t ip, hammer_tid_t tid); int hammer_create_at_cursor(hammer_cursor_t cursor, hammer_btree_leaf_elm_t leaf, void *udata, int mode); int hammer_delete_at_cursor(hammer_cursor_t cursor, int delete_flags, hammer_tid_t delete_tid, u_int32_t delete_ts, int track, int64_t *stat_bytes); int hammer_ip_check_directory_empty(hammer_transaction_t trans, hammer_inode_t ip); int hammer_sync_hmp(hammer_mount_t hmp, int waitfor); int hammer_queue_inodes_flusher(hammer_mount_t hmp, int waitfor); hammer_record_t hammer_alloc_mem_record(hammer_inode_t ip, int data_len); void hammer_flush_record_done(hammer_record_t record, int error); void hammer_wait_mem_record_ident(hammer_record_t record, const char *ident); void hammer_rel_mem_record(hammer_record_t record); int hammer_cursor_up(hammer_cursor_t cursor); int hammer_cursor_up_locked(hammer_cursor_t cursor); int hammer_cursor_down(hammer_cursor_t cursor); int hammer_cursor_upgrade(hammer_cursor_t cursor); int hammer_cursor_upgrade_node(hammer_cursor_t cursor); void hammer_cursor_downgrade(hammer_cursor_t cursor); int hammer_cursor_seek(hammer_cursor_t cursor, hammer_node_t node, int index); void hammer_lock_ex_ident(struct hammer_lock *lock, const char *ident); int hammer_lock_ex_try(struct hammer_lock *lock); void hammer_lock_sh(struct hammer_lock *lock); int hammer_lock_sh_try(struct hammer_lock *lock); int hammer_lock_upgrade(struct hammer_lock *lock); void hammer_lock_downgrade(struct hammer_lock *lock); int hammer_lock_status(struct hammer_lock *lock); void hammer_unlock(struct hammer_lock *lock); void hammer_ref(struct hammer_lock *lock); int hammer_ref_interlock(struct hammer_lock *lock); int hammer_ref_interlock_true(struct hammer_lock *lock); void hammer_ref_interlock_done(struct hammer_lock *lock); void hammer_rel(struct hammer_lock *lock); int hammer_rel_interlock(struct hammer_lock *lock, int locked); void hammer_rel_interlock_done(struct hammer_lock *lock, int orig_locked); int hammer_get_interlock(struct hammer_lock *lock); int hammer_try_interlock_norefs(struct hammer_lock *lock); void hammer_put_interlock(struct hammer_lock *lock, int error); void hammer_sync_lock_ex(hammer_transaction_t trans); void hammer_sync_lock_sh(hammer_transaction_t trans); int hammer_sync_lock_sh_try(hammer_transaction_t trans); void hammer_sync_unlock(hammer_transaction_t trans); u_int32_t hammer_to_unix_xid(uuid_t *uuid); void hammer_guid_to_uuid(uuid_t *uuid, u_int32_t guid); void hammer_time_to_timespec(u_int64_t xtime, struct timespec *ts); u_int64_t hammer_timespec_to_time(struct timespec *ts); int hammer_str_to_tid(const char *str, int *ispfsp, hammer_tid_t *tidp, u_int32_t *localizationp); int hammer_is_atatext(const char *name, int len); hammer_tid_t hammer_alloc_objid(hammer_mount_t hmp, hammer_inode_t dip, int64_t namekey); void hammer_clear_objid(hammer_inode_t dip); void hammer_destroy_objid_cache(hammer_mount_t hmp); int hammer_enter_undo_history(hammer_mount_t hmp, hammer_off_t offset, int bytes); void hammer_clear_undo_history(hammer_mount_t hmp); enum vtype hammer_get_vnode_type(u_int8_t obj_type); int hammer_get_dtype(u_int8_t obj_type); u_int8_t hammer_get_obj_type(enum vtype vtype); int64_t hammer_directory_namekey(hammer_inode_t dip, const void *name, int len, u_int32_t *max_iterationsp); int hammer_nohistory(hammer_inode_t ip); int hammer_init_cursor(hammer_transaction_t trans, hammer_cursor_t cursor, hammer_node_cache_t cache, hammer_inode_t ip); void hammer_normalize_cursor(hammer_cursor_t cursor); void hammer_done_cursor(hammer_cursor_t cursor); int hammer_recover_cursor(hammer_cursor_t cursor); void hammer_unlock_cursor(hammer_cursor_t cursor); int hammer_lock_cursor(hammer_cursor_t cursor); hammer_cursor_t hammer_push_cursor(hammer_cursor_t ocursor); void hammer_pop_cursor(hammer_cursor_t ocursor, hammer_cursor_t ncursor); void hammer_cursor_replaced_node(hammer_node_t onode, hammer_node_t nnode); void hammer_cursor_removed_node(hammer_node_t onode, hammer_node_t parent, int index); void hammer_cursor_split_node(hammer_node_t onode, hammer_node_t nnode, int index); void hammer_cursor_moved_element(hammer_node_t oparent, int pindex, hammer_node_t onode, int oindex, hammer_node_t nnode, int nindex); void hammer_cursor_parent_changed(hammer_node_t node, hammer_node_t oparent, hammer_node_t nparent, int nindex); void hammer_cursor_inserted_element(hammer_node_t node, int index); void hammer_cursor_deleted_element(hammer_node_t node, int index); int hammer_btree_lookup(hammer_cursor_t cursor); int hammer_btree_first(hammer_cursor_t cursor); int hammer_btree_last(hammer_cursor_t cursor); int hammer_btree_extract(hammer_cursor_t cursor, int flags); int hammer_btree_iterate(hammer_cursor_t cursor); int hammer_btree_iterate_reverse(hammer_cursor_t cursor); int hammer_btree_insert(hammer_cursor_t cursor, hammer_btree_leaf_elm_t elm, int *doprop); int hammer_btree_delete(hammer_cursor_t cursor); void hammer_btree_do_propagation(hammer_cursor_t cursor, hammer_pseudofs_inmem_t pfsm, hammer_btree_leaf_elm_t leaf); int hammer_btree_cmp(hammer_base_elm_t key1, hammer_base_elm_t key2); int hammer_btree_chkts(hammer_tid_t ts, hammer_base_elm_t key); int hammer_btree_correct_rhb(hammer_cursor_t cursor, hammer_tid_t tid); int hammer_btree_correct_lhb(hammer_cursor_t cursor, hammer_tid_t tid); int btree_set_parent(hammer_transaction_t trans, hammer_node_t node, hammer_btree_elm_t elm); void hammer_node_lock_init(hammer_node_lock_t parent, hammer_node_t node); int hammer_btree_lock_children(hammer_cursor_t cursor, int depth, hammer_node_lock_t parent); void hammer_btree_lock_copy(hammer_cursor_t cursor, hammer_node_lock_t parent); int hammer_btree_sync_copy(hammer_cursor_t cursor, hammer_node_lock_t parent); void hammer_btree_unlock_children(hammer_cursor_t cursor, hammer_node_lock_t parent); int hammer_btree_search_node(hammer_base_elm_t elm, hammer_node_ondisk_t node); hammer_node_t hammer_btree_get_parent(hammer_transaction_t trans, hammer_node_t node, int *parent_indexp, int *errorp, int try_exclusive); void hammer_print_btree_node(hammer_node_ondisk_t ondisk); void hammer_print_btree_elm(hammer_btree_elm_t elm, u_int8_t type, int i); void *hammer_bread(struct hammer_mount *hmp, hammer_off_t off, int *errorp, struct hammer_buffer **bufferp); void *hammer_bnew(struct hammer_mount *hmp, hammer_off_t off, int *errorp, struct hammer_buffer **bufferp); void *hammer_bread_ext(struct hammer_mount *hmp, hammer_off_t off, int bytes, int *errorp, struct hammer_buffer **bufferp); void *hammer_bnew_ext(struct hammer_mount *hmp, hammer_off_t off, int bytes, int *errorp, struct hammer_buffer **bufferp); hammer_volume_t hammer_get_root_volume(hammer_mount_t hmp, int *errorp); hammer_volume_t hammer_get_volume(hammer_mount_t hmp, int32_t vol_no, int *errorp); hammer_buffer_t hammer_get_buffer(hammer_mount_t hmp, hammer_off_t buf_offset, int bytes, int isnew, int *errorp); void hammer_sync_buffers(hammer_mount_t hmp, hammer_off_t base_offset, int bytes); int hammer_del_buffers(hammer_mount_t hmp, hammer_off_t base_offset, hammer_off_t zone2_offset, int bytes, int report_conflicts); int hammer_ref_volume(hammer_volume_t volume); int hammer_ref_buffer(hammer_buffer_t buffer); void hammer_flush_buffer_nodes(hammer_buffer_t buffer); void hammer_rel_volume(hammer_volume_t volume, int locked); void hammer_rel_buffer(hammer_buffer_t buffer, int locked); int hammer_vfs_export(struct mount *mp, int op, const struct export_args *export); hammer_node_t hammer_get_node(hammer_transaction_t trans, hammer_off_t node_offset, int isnew, int *errorp); void hammer_ref_node(hammer_node_t node); hammer_node_t hammer_ref_node_safe(hammer_transaction_t trans, hammer_node_cache_t cache, int *errorp); void hammer_rel_node(hammer_node_t node); void hammer_delete_node(hammer_transaction_t trans, hammer_node_t node); void hammer_cache_node(hammer_node_cache_t cache, hammer_node_t node); void hammer_uncache_node(hammer_node_cache_t cache); void hammer_flush_node(hammer_node_t node, int locked); void hammer_dup_buffer(struct hammer_buffer **bufferp, struct hammer_buffer *buffer); hammer_node_t hammer_alloc_btree(hammer_transaction_t trans, hammer_off_t hint, int *errorp); void *hammer_alloc_data(hammer_transaction_t trans, int32_t data_len, u_int16_t rec_type, hammer_off_t *data_offsetp, struct hammer_buffer **data_bufferp, hammer_off_t hint, int *errorp); int hammer_generate_undo(hammer_transaction_t trans, hammer_off_t zone1_offset, void *base, int len); int hammer_generate_redo(hammer_transaction_t trans, hammer_inode_t ip, hammer_off_t file_offset, u_int32_t flags, void *base, int len); void hammer_generate_redo_sync(hammer_transaction_t trans); void hammer_redo_fifo_start_flush(hammer_inode_t ip); void hammer_redo_fifo_end_flush(hammer_inode_t ip); void hammer_format_undo(void *base, u_int32_t seqno); int hammer_upgrade_undo_4(hammer_transaction_t trans); void hammer_put_volume(struct hammer_volume *volume, int flush); void hammer_put_buffer(struct hammer_buffer *buffer, int flush); hammer_off_t hammer_freemap_alloc(hammer_transaction_t trans, hammer_off_t owner, int *errorp); void hammer_freemap_free(hammer_transaction_t trans, hammer_off_t phys_offset, hammer_off_t owner, int *errorp); int _hammer_checkspace(hammer_mount_t hmp, int slop, int64_t *resp); hammer_off_t hammer_blockmap_alloc(hammer_transaction_t trans, int zone, int bytes, hammer_off_t hint, int *errorp); hammer_reserve_t hammer_blockmap_reserve(hammer_mount_t hmp, int zone, int bytes, hammer_off_t *zone_offp, int *errorp); void hammer_blockmap_reserve_complete(hammer_mount_t hmp, hammer_reserve_t resv); void hammer_reserve_clrdelay(hammer_mount_t hmp, hammer_reserve_t resv); void hammer_blockmap_free(hammer_transaction_t trans, hammer_off_t bmap_off, int bytes); int hammer_blockmap_finalize(hammer_transaction_t trans, hammer_reserve_t resv, hammer_off_t bmap_off, int bytes); int hammer_blockmap_getfree(hammer_mount_t hmp, hammer_off_t bmap_off, int *curp, int *errorp); hammer_off_t hammer_blockmap_lookup(hammer_mount_t hmp, hammer_off_t bmap_off, int *errorp); hammer_off_t hammer_undo_lookup(hammer_mount_t hmp, hammer_off_t bmap_off, int *errorp); int64_t hammer_undo_used(hammer_transaction_t trans); int64_t hammer_undo_space(hammer_transaction_t trans); int64_t hammer_undo_max(hammer_mount_t hmp); int hammer_undo_reclaim(hammer_io_t io); void hammer_start_transaction(struct hammer_transaction *trans, struct hammer_mount *hmp); void hammer_simple_transaction(struct hammer_transaction *trans, struct hammer_mount *hmp); void hammer_start_transaction_fls(struct hammer_transaction *trans, struct hammer_mount *hmp); void hammer_done_transaction(struct hammer_transaction *trans); hammer_tid_t hammer_alloc_tid(hammer_mount_t hmp, int count); void hammer_modify_inode(hammer_transaction_t trans, hammer_inode_t ip, int flags); void hammer_flush_inode(hammer_inode_t ip, int flags); void hammer_flush_inode_done(hammer_inode_t ip, int error); void hammer_wait_inode(hammer_inode_t ip); int hammer_create_inode(struct hammer_transaction *trans, struct vattr *vap, struct ucred *cred, struct hammer_inode *dip, const char *name, int namelen, hammer_pseudofs_inmem_t pfsm, struct hammer_inode **ipp); void hammer_rel_inode(hammer_inode_t ip, int flush); int hammer_reload_inode(hammer_inode_t ip, void *arg __unused); int hammer_ino_rb_compare(hammer_inode_t ip1, hammer_inode_t ip2); int hammer_redo_rb_compare(hammer_inode_t ip1, hammer_inode_t ip2); int hammer_destroy_inode_callback(hammer_inode_t ip, void *data __unused); int hammer_sync_inode(hammer_transaction_t trans, hammer_inode_t ip); void hammer_test_inode(hammer_inode_t dip); void hammer_inode_unloadable_check(hammer_inode_t ip, int getvp); int hammer_ip_add_directory(struct hammer_transaction *trans, hammer_inode_t dip, const char *name, int bytes, hammer_inode_t nip); int hammer_ip_del_directory(struct hammer_transaction *trans, hammer_cursor_t cursor, hammer_inode_t dip, hammer_inode_t ip); void hammer_ip_replace_bulk(hammer_mount_t hmp, hammer_record_t record); hammer_record_t hammer_ip_add_bulk(hammer_inode_t ip, off_t file_offset, void *data, int bytes, int *errorp); int hammer_ip_frontend_trunc(struct hammer_inode *ip, off_t file_size); int hammer_ip_add_record(struct hammer_transaction *trans, hammer_record_t record); int hammer_ip_delete_range(hammer_cursor_t cursor, hammer_inode_t ip, int64_t ran_beg, int64_t ran_end, int truncating); int hammer_ip_delete_clean(hammer_cursor_t cursor, hammer_inode_t ip, int *countp); int hammer_ip_sync_data(hammer_cursor_t cursor, hammer_inode_t ip, int64_t offset, void *data, int bytes); int hammer_ip_sync_record(hammer_transaction_t trans, hammer_record_t rec); int hammer_ip_sync_record_cursor(hammer_cursor_t cursor, hammer_record_t rec); hammer_pseudofs_inmem_t hammer_load_pseudofs(hammer_transaction_t trans, u_int32_t localization, int *errorp); int hammer_mkroot_pseudofs(hammer_transaction_t trans, struct ucred *cred, hammer_pseudofs_inmem_t pfsm); int hammer_save_pseudofs(hammer_transaction_t trans, hammer_pseudofs_inmem_t pfsm); int hammer_unload_pseudofs(hammer_transaction_t trans, u_int32_t localization); void hammer_rel_pseudofs(hammer_mount_t hmp, hammer_pseudofs_inmem_t pfsm); int hammer_ioctl(hammer_inode_t ip, u_long com, caddr_t data, int fflag, struct ucred *cred); void hammer_io_init(hammer_io_t io, hammer_volume_t volume, enum hammer_io_type type); int hammer_io_read(struct vnode *devvp, struct hammer_io *io, hammer_off_t limit); void hammer_io_advance(struct hammer_io *io); int hammer_io_new(struct vnode *devvp, struct hammer_io *io); int hammer_io_inval(hammer_volume_t volume, hammer_off_t zone2_offset); struct buf *hammer_io_release(struct hammer_io *io, int flush); void hammer_io_flush(struct hammer_io *io, int reclaim); void hammer_io_wait(struct hammer_io *io); void hammer_io_waitdep(struct hammer_io *io); void hammer_io_wait_all(hammer_mount_t hmp, const char *ident, int doflush); int hammer_io_direct_read(hammer_mount_t hmp, struct bio *bio, hammer_btree_leaf_elm_t leaf); int hammer_io_direct_write(hammer_mount_t hmp, struct bio *bio, hammer_record_t record); void hammer_io_direct_wait(hammer_record_t record); void hammer_io_direct_uncache(hammer_mount_t hmp, hammer_btree_leaf_elm_t leaf); void hammer_io_write_interlock(hammer_io_t io); void hammer_io_done_interlock(hammer_io_t io); void hammer_io_clear_modify(struct hammer_io *io, int inval); void hammer_io_clear_modlist(struct hammer_io *io); void hammer_io_flush_sync(hammer_mount_t hmp); void hammer_io_clear_error(struct hammer_io *io); void hammer_io_notmeta(hammer_buffer_t buffer); void hammer_modify_volume(hammer_transaction_t trans, hammer_volume_t volume, void *base, int len); void hammer_modify_buffer(hammer_transaction_t trans, hammer_buffer_t buffer, void *base, int len); void hammer_modify_volume_done(hammer_volume_t volume); void hammer_modify_buffer_done(hammer_buffer_t buffer); int hammer_ioc_reblock(hammer_transaction_t trans, hammer_inode_t ip, struct hammer_ioc_reblock *reblock); int hammer_ioc_rebalance(hammer_transaction_t trans, hammer_inode_t ip, struct hammer_ioc_rebalance *rebal); int hammer_ioc_prune(hammer_transaction_t trans, hammer_inode_t ip, struct hammer_ioc_prune *prune); int hammer_ioc_mirror_read(hammer_transaction_t trans, hammer_inode_t ip, struct hammer_ioc_mirror_rw *mirror); int hammer_ioc_mirror_write(hammer_transaction_t trans, hammer_inode_t ip, struct hammer_ioc_mirror_rw *mirror); int hammer_ioc_set_pseudofs(hammer_transaction_t trans, hammer_inode_t ip, struct ucred *cred, struct hammer_ioc_pseudofs_rw *pfs); int hammer_ioc_get_pseudofs(hammer_transaction_t trans, hammer_inode_t ip, struct hammer_ioc_pseudofs_rw *pfs); int hammer_ioc_destroy_pseudofs(hammer_transaction_t trans, hammer_inode_t ip, struct hammer_ioc_pseudofs_rw *pfs); int hammer_ioc_downgrade_pseudofs(hammer_transaction_t trans, hammer_inode_t ip, struct hammer_ioc_pseudofs_rw *pfs); int hammer_ioc_upgrade_pseudofs(hammer_transaction_t trans, hammer_inode_t ip, struct hammer_ioc_pseudofs_rw *pfs); int hammer_ioc_wait_pseudofs(hammer_transaction_t trans, hammer_inode_t ip, struct hammer_ioc_pseudofs_rw *pfs); int hammer_ioc_volume_add(hammer_transaction_t trans, hammer_inode_t ip, struct hammer_ioc_volume *ioc); int hammer_ioc_volume_del(hammer_transaction_t trans, hammer_inode_t ip, struct hammer_ioc_volume *ioc); int hammer_signal_check(hammer_mount_t hmp); void hammer_flusher_create(hammer_mount_t hmp); void hammer_flusher_destroy(hammer_mount_t hmp); void hammer_flusher_sync(hammer_mount_t hmp); int hammer_flusher_async(hammer_mount_t hmp, hammer_flush_group_t flg); int hammer_flusher_async_one(hammer_mount_t hmp); void hammer_flusher_wait(hammer_mount_t hmp, int seq); void hammer_flusher_wait_next(hammer_mount_t hmp); int hammer_flusher_meta_limit(hammer_mount_t hmp); int hammer_flusher_meta_halflimit(hammer_mount_t hmp); int hammer_flusher_undo_exhausted(hammer_transaction_t trans, int quarter); void hammer_flusher_clean_loose_ios(hammer_mount_t hmp); void hammer_flusher_finalize(hammer_transaction_t trans, int final); int hammer_flusher_haswork(hammer_mount_t hmp); void hammer_flusher_flush_undos(hammer_mount_t hmp, int already_flushed); int hammer_recover_stage1(hammer_mount_t hmp, hammer_volume_t rootvol); int hammer_recover_stage2(hammer_mount_t hmp, hammer_volume_t rootvol); void hammer_recover_flush_buffers(hammer_mount_t hmp, hammer_volume_t root_volume, int final); void hammer_crc_set_blockmap(hammer_blockmap_t blockmap); void hammer_crc_set_volume(hammer_volume_ondisk_t ondisk); void hammer_crc_set_leaf(void *data, hammer_btree_leaf_elm_t leaf); int hammer_crc_test_blockmap(hammer_blockmap_t blockmap); int hammer_crc_test_volume(hammer_volume_ondisk_t ondisk); int hammer_crc_test_btree(hammer_node_ondisk_t ondisk); int hammer_crc_test_leaf(void *data, hammer_btree_leaf_elm_t leaf); void hkprintf(const char *ctl, ...); udev_t hammer_fsid_to_udev(uuid_t *uuid); int hammer_blocksize(int64_t file_offset); int hammer_blockoff(int64_t file_offset); int64_t hammer_blockdemarc(int64_t file_offset1, int64_t file_offset2); /* * Shortcut for _hammer_checkspace(), used all over the code. */ static __inline int hammer_checkspace(hammer_mount_t hmp, int slop) { return(_hammer_checkspace(hmp, slop, NULL)); } #endif static __inline void hammer_wait_mem_record(hammer_record_t record) { hammer_wait_mem_record_ident(record, "hmmwai"); } static __inline void hammer_lock_ex(struct hammer_lock *lock) { hammer_lock_ex_ident(lock, "hmrlck"); } /* * Indicate that a B-Tree node is being modified. */ static __inline void hammer_modify_node_noundo(hammer_transaction_t trans, hammer_node_t node) { KKASSERT((node->flags & HAMMER_NODE_CRCBAD) == 0); hammer_modify_buffer(trans, node->buffer, NULL, 0); } static __inline void hammer_modify_node_all(hammer_transaction_t trans, struct hammer_node *node) { KKASSERT((node->flags & HAMMER_NODE_CRCBAD) == 0); hammer_modify_buffer(trans, node->buffer, node->ondisk, sizeof(*node->ondisk)); } static __inline void hammer_modify_node(hammer_transaction_t trans, hammer_node_t node, void *base, int len) { hammer_crc_t *crcptr; KKASSERT((char *)base >= (char *)node->ondisk && (char *)base + len <= (char *)node->ondisk + sizeof(*node->ondisk)); KKASSERT((node->flags & HAMMER_NODE_CRCBAD) == 0); hammer_modify_buffer(trans, node->buffer, base, len); crcptr = &node->ondisk->crc; hammer_modify_buffer(trans, node->buffer, crcptr, sizeof(hammer_crc_t)); --node->buffer->io.modify_refs; /* only want one ref */ } /* * Indicate that the specified modifications have been completed. * * Do not try to generate the crc here, it's very expensive to do and a * sequence of insertions or deletions can result in many calls to this * function on the same node. */ static __inline void hammer_modify_node_done(hammer_node_t node) { node->flags |= HAMMER_NODE_CRCGOOD; if ((node->flags & HAMMER_NODE_NEEDSCRC) == 0) { node->flags |= HAMMER_NODE_NEEDSCRC; node->buffer->io.gencrc = 1; hammer_ref_node(node); } hammer_modify_buffer_done(node->buffer); } #define hammer_modify_volume_field(trans, vol, field) \ hammer_modify_volume(trans, vol, &(vol)->ondisk->field, \ sizeof((vol)->ondisk->field)) #define hammer_modify_node_field(trans, node, field) \ hammer_modify_node(trans, node, &(node)->ondisk->field, \ sizeof((node)->ondisk->field)) /* * The HAMMER_INODE_CAP_DIR_LOCAL_INO capability is set on newly * created directories for HAMMER version 2 or greater and causes * directory entries to be placed the inode localization zone in * the B-Tree instead of the misc zone. * * This greatly improves localization between directory entries and * inodes */ static __inline u_int32_t hammer_dir_localization(hammer_inode_t dip) { if (dip->ino_data.cap_flags & HAMMER_INODE_CAP_DIR_LOCAL_INO) return(HAMMER_LOCALIZE_INODE); else return(HAMMER_LOCALIZE_MISC); }