freebsd-skq/sys/fs/nfsclient
cem 3d8d5f23ac nfsclient: Protest loudly when GETATTR responses are invalid
BROKEN NFS SERVER OR MIDDLEWARE: Certain WAN "accelerators" attempt to cache
NFS GETATTR traffic, but actually corrupt it (e.g., responding to requests
with attributes for totally different files).

Warn very verbosely when this is detected. Linux' NFS client has a similar
warning.

Adds a sysctl/tunable (vfs.nfs.fileid_maxwarnings) to configure the quantity
of warnings; default to 10. (Zero disables; -1 is unlimited.)

Adds a failpoint to aid in validating the warning / behavior with a
non-broken server. Use something like:

    sysctl 'debug.fail_point.nfscl_force_fileid_warning=10%return(1)'

Reviewed by:	rmacklem
Approved by:	markj (mentor)
Sponsored by:	EMC / Isilon Storage Division
Differential Revision:	https://reviews.freebsd.org/D3304
2015-08-05 22:27:30 +00:00
..
nfs_clbio.c o Un-inline vm_pager_get_pages(), vm_pager_get_pages_async(). 2015-06-17 22:44:27 +00:00
nfs_clcomsubs.c
nfs_clkdtrace.c
nfs_clkrpc.c
nfs_clnfsiod.c
nfs_clnode.c
nfs_clport.c nfsclient: Protest loudly when GETATTR responses are invalid 2015-08-05 22:27:30 +00:00
nfs_clrpcops.c Alex Burlyga reported a POLA violation for the new NFS client as 2015-07-03 01:15:21 +00:00
nfs_clstate.c
nfs_clsubs.c
nfs_clvfsops.c If a "principal" argument isn't provided for a Kerberized NFS mount, 2015-07-03 22:11:07 +00:00
nfs_clvnops.c
nfs_kdtrace.h
nfs.h
nfsmount.h
nfsnode.h
nlminfo.h