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Annotation of 43BSDReno/sys/nfs/README, revision 1.1.1.1

1.1       root        1: This nfs directory is a merge of local and Berkeley changes up to
                      2: Dec. 10, 1989. The code has been tested in the "end of Aug. vnode kernel"
                      3: and also tested a little in the Nov. 30 vnode kernel. The kernel
                      4: differences are ifdef'd on VOP_PRINT in all files except nfs_bio.c,
                      5: nfs_node.c, nfs_vfsops.c and nfsnode.h. For these files, there are separate
                      6: ".old" for the end of Aug. and ".new" for the Nov. 30 kernels.
                      7: 
                      8: Two minor changes outside of the nfs directory are required to install
                      9: this level of hacks:
                     10: 
                     11: 1 - change the number of args. for the nfssvc system call from 1 -> 3 in
                     12:     syscalls.master and regenerate init_sysent.c (or cheat and just edit
                     13:     init_sysent.c as well)
                     14: 
                     15: 2 - add nfs_srvcache.c to conf/files (this is the server recent request
                     16:     cache)
                     17: 
                     18: A summary of changes since mid. Sept. are as follows:
                     19: 
                     20: - overloaded the usec component of the ctime and atime fields in the file
                     21:   attributes with the generation number and flags respectively
                     22: 
                     23: - modified the way the fsid number for the mount point is generated to
                     24:   ensure it is unique and returned that as the rdev attribute for files
                     25:   in that file system instead of returning the server's dev number
                     26: 
                     27: - changed ENOENT error returns from a client side remove rpc to return
                     28:   0 to avoid the problem associated with the Sun rpc at least once
                     29:   semantics
                     30: 
                     31: - unlock the directory before a client nfs_lookup rpc is issued and then
                     32:   relocking it for the oddball cases instead of unlocking it after the
                     33:   rpc returns for the unlock cases. (Hopefully this straightens out the
                     34:   problem with the automounter)
                     35: 
                     36: - Kirk's many cleanups done with the help of lint (I did put one unused
                     37:   variable assignment back in because several macros expect it to be
                     38:   set and if you used one of those in future versions of the nfs_serv.c
                     39:   it would blow up real good for a not very obvious reason)
                     40: 
                     41: - server side recent request caching in a manner similar to that described
                     42:   by Chet Juszczak of DEC at Usenix Winter 1989
                     43: 
                     44: - for the new kernel I have replaced all calls to nfs_blkflush with the new
                     45:   vfs ones. (goodbye nfs_blkflush, you were a kludge anyhow)

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