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      1 /* $NetBSD: nilfs_subr.h,v 1.5 2023/01/29 16:07:14 reinoud Exp $ */
      2 
      3 /*
      4  * Copyright (c) 2008, 2009 Reinoud Zandijk
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  *
     27  */
     28 
     29 #ifndef _FS_NILFS_NILFS_SUBR_H_
     30 #define _FS_NILFS_NILFS_SUBR_H_
     31 
     32 /* handies */
     33 #define	VFSTONILFS(mp)	((struct nilfs_mount *)mp->mnt_data)
     34 
     35 /* basic calculators */
     36 uint64_t nilfs_get_segnum_of_block(struct nilfs_device *nilfsdev, uint64_t blocknr);
     37 void nilfs_get_segment_range(struct nilfs_device *nilfsdev, uint64_t segnum,
     38 	uint64_t *seg_start, uint64_t *seg_end);
     39 void nilfs_calc_mdt_consts(struct nilfs_device *nilfsdev,
     40 	struct nilfs_mdt *mdt, int entry_size);
     41 uint32_t crc32_le(uint32_t crc, const uint8_t *buf, size_t len);
     42 
     43 /* log reading / volume helpers */
     44 int nilfs_get_segment_log(struct nilfs_device *nilfsdev, uint64_t *blocknr,
     45 	uint64_t *offset, struct buf **bpp, int len, void *blob);
     46 void nilfs_search_super_root(struct nilfs_device *nilfsdev);
     47 
     48 /* reading */
     49 int nilfs_bread(struct nilfs_node *node, uint64_t blocknr,
     50 	int flags, struct buf **bpp);
     51 
     52 /* btree operations */
     53 int nilfs_btree_nlookup(struct nilfs_node *node, uint64_t from, uint64_t blks, uint64_t *l2vmap);
     54 
     55 /* vtop operations */
     56 void nilfs_mdt_trans(struct nilfs_mdt *mdt, uint64_t index, uint64_t *blocknr, uint32_t *entry_in_block);
     57 int nilfs_nvtop(struct nilfs_node *node, uint64_t blks, uint64_t *l2vmap, uint64_t *v2pmap);
     58 
     59 /* node action implementators */
     60 int nilfs_get_node_raw(struct nilfs_device *nilfsdev, struct nilfs_mount *ump, uint64_t ino, struct nilfs_inode *inode, struct nilfs_node **nodep);
     61 void nilfs_dispose_node(struct nilfs_node **node);
     62 
     63 int nilfs_grow_node(struct nilfs_node *node, uint64_t new_size);
     64 int nilfs_shrink_node(struct nilfs_node *node, uint64_t new_size);
     65 void nilfs_itimes(struct nilfs_node *nilfs_node, struct timespec *acc,
     66 	struct timespec *mod, struct timespec *birth);
     67 int  nilfs_update(struct vnode *node, struct timespec *acc,
     68 	struct timespec *mod, struct timespec *birth, int updflags);
     69 
     70 /* return vpp? */
     71 int nilfs_lookup_name_in_dir(struct vnode *dvp, const char *name, int namelen, uint64_t *ino, int *found);
     72 int nilfs_create_node(struct vnode *dvp, struct vnode **vpp, struct vattr *vap, struct componentname *cnp);
     73 void nilfs_delete_node(struct nilfs_node *nilfs_node);
     74 
     75 int nilfs_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred);
     76 int nilfs_dir_detach(struct nilfs_mount *ump, struct nilfs_node *dir_node, struct nilfs_node *nilfs_node, struct componentname *cnp);
     77 int nilfs_dir_attach(struct nilfs_mount *ump, struct nilfs_node *dir_node, struct nilfs_node *nilfs_node, struct vattr *vap, struct componentname *cnp);
     78 
     79 
     80 /* vnode operations */
     81 int nilfs_inactive(void *v);
     82 int nilfs_reclaim(void *v);
     83 int nilfs_readdir(void *v);
     84 int nilfs_getattr(void *v);
     85 int nilfs_setattr(void *v);
     86 int nilfs_pathconf(void *v);
     87 int nilfs_open(void *v);
     88 int nilfs_close(void *v);
     89 int nilfs_access(void *v);
     90 int nilfs_read(void *v);
     91 int nilfs_write(void *v);
     92 int nilfs_trivial_bmap(void *v);
     93 int nilfs_vfsstrategy(void *v);
     94 int nilfs_lookup(void *v);
     95 int nilfs_create(void *v);
     96 int nilfs_mknod(void *v);
     97 int nilfs_link(void *);
     98 int nilfs_symlink(void *v);
     99 int nilfs_readlink(void *v);
    100 int nilfs_rename(void *v);
    101 int nilfs_remove(void *v);
    102 int nilfs_mkdir(void *v);
    103 int nilfs_rmdir(void *v);
    104 int nilfs_fsync(void *v);
    105 int nilfs_advlock(void *v);
    106 
    107 #endif	/* !_FS_NILFS_NILFS_SUBR_H_ */
    108