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Man Pages
VFS_GETVFS(9) FreeBSD Kernel Developer's Manual VFS_GETVFS(9)

vfs_getvfs
returns a mount point given its file system identifier

#include <sys/param.h>
#include <sys/mount.h>
struct mount *
vfs_getvfs(fsid_t *fsid);

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.

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

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

vfs_getnewfsid(9)

This manual page was written by Chad David <davidc@acns.ab.ca>.
November 21, 2001 FreeBSD 12.0-RELEASE

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