It turns out that storing a counted ref to 'struct cred' in
nfs_access_entry wasn't a good choice.
'struct cred' contains counted references to 'struct key', and users
have a quota on how many keys they can have. Keeping a cred in a cache
imposes on that quota.
The nfs access cache can keep a large number of entries, and keep them
indefinitely. This can cause a user to go over-quota.
This series removes the 'struct cred *' from nfs_access_entry and
instead stores the uid, gid, and a pointer to the group info.
This makes the nfs_access_entry 64 bits larger.
Thanks,
NeilBrown
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NeilBrown (3):
NFS: change nfs_access_get_cached to only report the mask
NFS: pass cred explicitly for access tests
NFS: don't store 'struct cred *' in struct nfs_access_entry
fs/nfs/dir.c | 63 ++++++++++++++++++++++++++++++++++-------
fs/nfs/nfs3proc.c | 5 ++--
fs/nfs/nfs4proc.c | 13 +++++----
include/linux/nfs_fs.h | 6 ++--
include/linux/nfs_xdr.h | 2 +-
5 files changed, 67 insertions(+), 22 deletions(-)
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