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Length: 2562 (0xa02)
Types: TextFile
Notes: UNIX file
Names: »mount.h«
└─⟦a6ab2eb36⟧ Bits:30004042/kconfig3.imd SW95705I 386/ix Multi-user Release 1.2
└─⟦a6ab2eb36⟧ UNIX Filesystem
└─⟦this⟧ »kc/new/usr/include/sys/mount.h«
/* Copyright (c) 1984 AT&T */
/* All Rights Reserved */
/* THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T */
/* The copyright notice above does not evidence any */
/* actual or intended publication of such source code. */
#ident "@(#)mount.h 1.5"
/*
* Mount structure.
* One allocated on every mount.
*/
#ifndef DIRSIZ /* REMOTE */
#define DIRSIZ 14
#endif
#define NMSZ DIRSIZ + 1 /* size of advertised name */
struct mount {
ushort m_flags; /* status */
short m_fstyp; /* file system type */
long m_bsize; /* Block size of this fs */
dev_t m_dev; /* device mounted */
caddr_t m_bufp; /* buffer for super block */
union {
struct inode *inodp; /* pointer to mounted on inode */
struct sndd *upchan; /* LBIN case, mounted remotely */
} u1;
union {
struct inode *mountp; /* pointer to mount root inode */
struct sndd *dnchan; /* remote mount case, root elsewhere */
} u2;
char m_rflags; /* set to MLBIN for mount remotely */
char *m_name; /* name advertised resource */
long m_bcount;
} ;
#define m_inodp u1.inodp
#define m_mount u2.mountp
#define m_up u1.upchan
#define m_down u2.dnchan
/* alloction flags (m_flags) */
#define MFREE 0x0 /* Unused - free */
#define MINUSE 0x1 /* In use - fs mounted on this entry */
#define MINTER 0x2 /* Mount system call is using this entry */
#define MRDONLY 0x4 /* File system is mounted read only */
#define rdonlyfs(mp) (((mp)->m_flags & MRDONLY) || (server() \
&& (srmount[u.u_mntindx].sr_flags & MRDONLY)))
/* remoteness flags (m_rflags) */
/* (or'ed with m_flags in srmount, so must use different bits) */
#define MLBIN 0x10
#define MDOTDOT 0x20
#define MFUMOUNT 0x40
#define MLINKDOWN 0x80
/* Flag bits passed to the mount system call */
#define MS_RDONLY 0x1 /* read only bit */
#define MS_FSS 0x2 /* FSS (4-argument) mount */
#ifdef NFSIX
#define MS_DATA 0x4 /* FSS+DATA (6-argument) mount */
#endif
#ifdef INKERNEL
extern struct mount mount[];
#endif
/* Server mount structure. Holds:
* 1. DOT-DOT
* 2. LBIN
* connections.
*
* Search the table looking for (sysid, rootinode) pair.
*/
struct srmnt {
sysid_t sr_sysid;
char sr_flags;
struct inode *sr_rootinode; /* inode on server's machine */
int sr_mntindx; /* mount index of requestor */
int sr_refcnt; /* number of open files */
int sr_dotdot; /* for lbin mount, so .. works */
long sr_bcount;
int sr_slpcnt;
} ;
extern struct srmnt srmount[];
/* Return values if crossing mount point */
#define DOT_DOT 0x1
#define LBIN 0x2
#define MRDONLY 0x4