Scroll to navigation

VFS_GETVFS(9) Kernel Developer's Manual VFS_GETVFS(9)

NAME

vfs_getvfs —
returns a mount point given its file system identifier

SYNOPSIS

#include <sys/param.h>
#include <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 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

This manual page was written by Chad David <davidc@acns.ab.ca>.
November 21, 2001 Linux 4.9.0-9-amd64