Re: Adding subroot information to /proc/mounts, or obtaining that through other means

H. Peter Anvin
2007-06-20T22:57:23Z

Chuck Lever wrote:
> The advantage is that it doesn't have strong user space dependencies on
> its format like /proc/mounts does.
>
> If you have NFS mount points, you will see that it includes a great deal
> of additional information about each mount.

OK, I see now:
device raidtest:/export mounted on /net/raidtest/export with fstype nfs
statvers=1.0
opts:
rw,vers=3,rsize=131072,wsize=131072,acregmin=3,acregmax=60,acdirmin=30,acdirmax=60,hard,proto=tcp,timeo=600,retrans=2,sec=sys
age: 5
caps: caps=0x9,wtmult=4096,dtsize=4096,bsize=0,namelen=255
sec: flavor=1,pseudoflavor=1
events: 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
bytes: 0 0 0 0 0 0 0 0
RPC iostats version: 1.0 p/v: 100003/3 (nfs)
xprt: tcp 686 0 2 0 5 8 8 0 8 0
per-op statistics
NULL: 0 0 0 0 0 0 0 0
GETATTR: 2 2 0 264 224 1 0 1
SETATTR: 0 0 0 0 0 0 0 0
LOOKUP: 0 0 0 0 0 0 0 0
ACCESS: 1 1 0 116 120 0 0 0
READLINK: 0 0 0 0 0 0 0 0
READ: 0 0 0 0 0 0 0 0
WRITE: 0 0 0 0 0 0 0 0
CREATE: 0 0 0 0 0 0 0 0
MKDIR: 0 0 0 0 0 0 0 0
SYMLINK: 0 0 0 0 0 0 0 0
MKNOD: 0 0 0 0 0 0 0 0
REMOVE: 0 0 0 0 0 0 0 0
RMDIR: 0 0 0 0 0 0 0 0
RENAME: 0 0 0 0 0 0 0 0
LINK: 0 0 0 0 0 0 0 0
READDIR: 0 0 0 0 0 0 0 0
READDIRPLUS: 0 0 0 0 0 0 0 0
FSSTAT: 1 1 0 132 84 0 1 1
FSINFO: 1 1 0 132 80 0 0 0
PATHCONF: 0 0 0 0 0 0 0 0
COMMIT: 0 0 0 0 0 0 0 0

This format is just awful for parsing. It's pretty clearly totally
ad-hoc. It's not even self-consistent (it uses different separators,
etc, in the same file!) It's reasonably compact for human consumption,
but it doesn't show what the arrays mean.

Heck, XML would have been better than this mess...

-hpa