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VFS_GETVFS (9) | Kernel routines | Unix Manual Pages | :man

NAME

vfs_getvfs - "returns a mount point given its file system identifier"

CONTENTS

Synopsis
Description
Return Values
Pseudocode
See Also
Authors

SYNOPSIS


.In sys/param.h
.In sys/mount.h "struct mount *" vfs_getvfs "fsid_t *fsid"

DESCRIPTION

The vfs_getvfs function returns the mount point structure for a file system given its file system identifier. The file system ID should have been allocated by calling vfs_getnewfsid(9); otherwise, it will not be found.

A major user of vfs_getvfs is NFS, which uses the
.Vt fsid as part of file handles in order to determine the file system a given RPC is for. If vfs_getvfs fails to find the mount point related to fsid, the file system is considered stale.

RETURN VALUES

If fsid is found, the mount point for the ID is returned; otherwise, NULL is returned.

PSEUDOCODE


if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) {
error = ESTALE;
goto out;
}

SEE ALSO

vfs_getnewfsid(9)

AUTHORS


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