kernel.git/net/sunrpc/auth_unix.c, branch linux-5.18.y

SUNRPC: Fix unx_lookup_cred() allocation

2022-03-22T19:52:55Z

Default to the same mempool allocation strategy as for rpc_malloc(). Signed-off-by: Trond Myklebust

SUNRPC/auth: async tasks mustn't block waiting for memory

2022-03-13T16:59:35Z

When memory is short, new worker threads cannot be created and we depend on the minimum one rpciod thread to be able to handle everything. So it must not block waiting for memory. mempools are particularly a problem as memory can only be released back to the mempool by an async rpc task running. If all available workqueue threads are waiting on the mempool, no thread is available to return anything. lookup_cred() can block on a mempool or kmalloc - and this can cause deadlocks. So add a new RPCAUTH_LOOKUP flag for async lookups and don't block on memory. If the -ENOMEM gets back to call_refreshresult(), wait a short while and try again. HZ>>4 is chosen as it is used elsewhere for -ENOMEM retries. Signed-off-by: NeilBrown Signed-off-by: Trond Myklebust

SUNRPC: Convert GFP_NOFS to GFP_KERNEL

2022-02-25T23:50:12Z

The sections which should not re-enter the filesystem are already protected with memalloc_nofs_save/restore calls, so it is better to use GFP_KERNEL in these calls to allow better performance for synchronous RPC calls. Signed-off-by: Trond Myklebust

SUNRPC: Use the client user namespace when encoding creds

2019-04-26T20:24:32Z

When encoding AUTH_UNIX creds and AUTH_GSS upcalls, use the user namespace of the process that created the rpc client. Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker

Merge tag 'nfs-rdma-for-5.1-1' of git://git.linux-nfs.org/projects/anna/linux-nfs

2019-02-25T14:35:49Z

NFSoRDMA client updates for 5.1 New features: - Convert rpc auth layer to use xdr_streams - Config option to disable insecure enctypes - Reduce size of RPC receive buffers Bugfixes and cleanups: - Fix sparse warnings - Check inline size before providing a write chunk - Reduce the receive doorbell rate - Various tracepoint improvements [Trond: Fix up merge conflicts] Signed-off-by: Trond Myklebust

SUNRPC: remove pointless test in unx_match()

2019-02-20T22:33:55Z

As reported by Dan Carpenter, this test for acred->cred being set is inconsistent with the dereference of the pointer a few lines earlier. An 'auth_cred' *always* has ->cred set - every place that creates one initializes this field, often as the first thing done. So remove this test. Reported-by: Dan Carpenter Signed-off-by: NeilBrown Signed-off-by: Trond Myklebust

SUNRPC: Add rpc_auth::au_ralign field

2019-02-14T16:48:36Z

Currently rpc_inline_rcv_pages() uses au_rslack to estimate the size of the upper layer reply header. This is fine for auth flavors where au_verfsize == au_rslack. However, some auth flavors have more going on. krb5i for example has two more words after the verifier, and another blob following the RPC message. The calculation involving au_rslack pushes the upper layer reply header too far into the rcv_buf. au_rslack is still valuable: it's the amount of buffer space needed for the reply, and is used when allocating the reply buffer. We'll keep that. But, add a new field that can be used to properly estimate the location of the upper layer header in each RPC reply, based on the auth flavor in use. Signed-off-by: Chuck Lever Signed-off-by: Anna Schumaker

SUNRPC: Make AUTH_SYS and AUTH_NULL set au_verfsize

2019-02-14T16:17:47Z

au_verfsize will be needed for a non-flavor-specific computation in a subsequent patch. Signed-off-by: Chuck Lever Signed-off-by: Anna Schumaker

SUNRPC: Use struct xdr_stream when decoding RPC Reply header

2019-02-14T14:11:18Z

Modernize and harden the code path that parses an RPC Reply message. Signed-off-by: Chuck Lever Signed-off-by: Anna Schumaker

SUNRPC: Use struct xdr_stream when constructing RPC Call header

2019-02-13T18:45:17Z

Modernize and harden the code path that constructs each RPC Call message. Signed-off-by: Chuck Lever Signed-off-by: Anna Schumaker