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vfs_getvfs.9freebsd

BSD mandoc

NAME

vfs_getvfs - returns a mount point given its file system identifier

SYNOPSIS

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

DESCRIPTION

The Fn 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_getnewfsid9; otherwise, it will not be found.

A major user of Fn 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 Fn vfs_getvfs fails to find the mount point related to Fa fsid , the file system is considered stale.

RETURN VALUES

If Fa 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_getnewfsid9

AUTHORS

This manual page was written by An Chad David Aq davidc@acns.ab.ca .