80 lines
2.3 KiB
C
80 lines
2.3 KiB
C
/* @(#)pc_node.h 1.1 94/10/31 SMI */
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/*
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* Copyright (c) 1989 by Sun Microsystems, Inc.
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*/
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struct pcnode {
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struct pcnode *pc_forw; /* active list ptrs, must be first */
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struct pcnode *pc_back;
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int pc_flags; /* see below */
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struct vnode * pc_vn; /* vnode for pcnode */
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long pc_size; /* size of file */
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short pc_scluster; /* starting cluster of file */
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daddr_t pc_eblkno; /* disk blkno for entry */
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int pc_eoffset; /* offset in disk block of entry */
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struct pcdir pc_entry; /* directory entry of file */
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};
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/*
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* flags
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*/
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#define PC_MOD 0x01 /* file data has been modified */
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#define PC_CHG 0x02 /* node data has been changed */
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#define PC_INVAL 0x04 /* node is invalid */
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#define PC_RELE_PEND 0x08 /* node is waiting to be released */
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#define PC_EXTERNAL 0x10 /* vnode ref is held externally */
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#define PCTOV(PCP) ((PCP)->pc_vn)
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#define VTOPC(VP) ((struct pcnode *)((VP)->v_data))
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#define PRIPCNODE (PZERO - 1)
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/*
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* Make a unique integer for a file
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*/
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#define ENTPS (PC_SECSIZE / sizeof (struct pcdir))
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#define pc_makenodeid(BN, OFF, EP) \
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((EP)->pcd_attr & PCA_DIR? \
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-ltohs((EP)->pcd_scluster) - 1: \
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((BN) * ENTPS) + ((OFF) / sizeof (struct pcdir)))
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#define NPCHASH 1
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#if NPCHASH == 1
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#define PCFHASH(FSP, BN, O) 0
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#define PCDHASH(FSP, SC) 0
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#else
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#define PCFHASH(FSP, BN, O) (((unsigned)FSP + BN + O) % NPCHASH)
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#define PCDHASH(FSP, SC) (((unsigned)FSP + SC) % NPCHASH)
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#endif
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struct pchead {
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struct pcnode *pch_forw;
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struct pcnode *pch_back;
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};
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/*
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* pcnode file, directory and invalid node operations vectors
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*/
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extern struct vnodeops pcfs_fvnodeops;
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extern struct vnodeops pcfs_dvnodeops;
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extern struct pchead pcfhead[];
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extern struct pchead pcdhead[];
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/*
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* pcnode routines
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*/
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extern void pc_init();
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extern struct pcnode *pc_getnode(); /* get a pcnode for a file */
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extern void pc_rele(); /* release a pcnode */
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extern void pc_mark(); /* mark pcnode with current time */
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extern int pc_nodesync(); /* flush node blocks and update entry */
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extern int pc_nodeupdate(); /* update node directory entry */
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extern int pc_bmap(); /* map logical to physical blocks */
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extern int pc_balloc(); /* allocate blocks for a file */
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extern int pc_bfree(); /* free blocks for a file */
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extern int pc_verify(); /* verify a pcnode with the disk */
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extern void pc_diskchanged(); /* call when disk change is detected */
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