Copyright (c) 1996 Doug Rabson
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$FreeBSD: head/share/man/man9/VFS_MOUNT.9 57731 2000-03-03 14:05:08Z sheldonh $
.Dd July 24, 1996 .Os .Dt VFS_MOUNT 9 .Sh NAME .Nm VFS_MOUNT .Nd mount a filesystem .Sh SYNOPSIS .Fd #include <sys/param.h> .Fd #include <sys/mount.h> .Fd #include <sys/vnode.h> .Ft int .Fn VFS_MOUNT "struct mount *mp" "char *path" "caddr_t data" "struct nameidata *ndp" "struct proc *p" .Sh DESCRIPTION Mount a filesystem into the system's namespace.
p Its arguments are: l -tag -width data t Ar mp Structure representing the filesystem. t Ar path Pathname where the filesystem is being mounted. t Ar data Filesystem specific data. This should be read into the kernel using .Xr copyin 9 . t Ar ndp Contains the result of a .Xr namei 9 call on the pathname of the mountpoint. t Ar p Process which is mounting the filesystem. .El
p This is called both to mount new filesystems and to change the attributes of an existing filesystem. If the .Dv MNT_UPDATE flag is set in .Fa mp->mnt_flag then the filesystem should update its internal state from the value of .Fa mp->mnt_flag . This can be used, for instance, to convert a read-only filesystem to read-write. It is also used by .Xr mountd 8 to update the NFS export information for the filesystem.
p If the .Dv MNT_UPDATE flag is not specified, then this is a newly mounted filesystem. The filesystem code should allocate and initialize any private data needed to represent the filesystem (it can use the .Fa mp->mnt_data field to store this information). .Sh SEE ALSO .Xr VFS 9 , .Xr vnode 9 .Sh AUTHORS This man page was written by .An Doug Rabson .