NAME¶
vfs_getnewfsid —
allocate a new file system identifier
SYNOPSIS¶
#include
<sys/param.h>
#include
<sys/mount.h>
void
vfs_getnewfsid(
struct
mount *mp);
DESCRIPTION¶
The
vfs_getnewfsid() function allocates a new
file system identifier for the mount point given. File systems typically call
vfs_getnewfsid() in their mount routine in
order to acquire a unique ID within the system which can later be used to
uniquely identify the file system via calls such as
vfs_getvfs(9).
The actual
fsid is made up of two 32 bit
integers, that are stored in the
statfs
structure of
mp. The first integer is unique
in the set of mounted file systems, while the second holds the file system
type.
typedef struct fsid {
int32_t val[2];
} fsid_t;
PSEUDOCODE¶
xxx_mount(struct mount *mp, char *path, caddr_t data,
struct nameidata *ndp, struct thread *td)
{
...
vfs_getnewfsid(mp);
...
}
SEE ALSO¶
vfs_getvfs(9)
AUTHORS¶
This manual page was written by
Chad David
⟨davidc@acns.ab.ca⟩.
