kernel/linux.git/include/linux/sunrpc/auth.h, branch v6.19.11

SUNRPC: Add RPC client support for the RPC_AUTH_TLS auth flavor

2023-06-19T16:18:36+00:00

The new authentication flavor is used only to discover peer support for RPC-over-TLS. Signed-off-by: Chuck Lever Signed-off-by: Trond Myklebust

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

2022-03-13T16:59:35+00:00

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: receive buffer size estimation values almost never change

2020-06-11T17:33:47+00:00

Avoid unnecessary cache sloshing by placing the buffer size estimation update logic behind an atomic bit flag. The size of GSS information included in each wrapped Reply does not change during the lifetime of a GSS context. Therefore, the au_rslack and au_ralign fields need to be updated only once after establishing a fresh GSS credential. Thus a slack size update must occur after a cred is created, duplicated, renewed, or expires. I'm not sure I have this exactly right. A trace point is introduced to track updates to these variables to enable troubleshooting the problem if I missed a spot. Signed-off-by: Chuck Lever Signed-off-by: Anna Schumaker

SUNRPC: Remove broken gss_mech_list_pseudoflavors()

2020-01-15T15:54:32+00:00

Remove gss_mech_list_pseudoflavors() and its callers. This is part of an unused API, and could leak an RCU reference if it were ever called. Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker

sunrpc: remove KERNEL ifdefs

2019-11-12T16:43:29+00:00

Remove the __KERNEL__ ifdefs from the non-UAPI sunrpc headers, as those can't be included from user space programs. Signed-off-by: Christoph Hellwig Signed-off-by: J. Bruce Fields

SUNRPC: Add rpc_auth::au_ralign field

2019-02-14T16:48:36+00:00

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

2019-02-14T16:17:47+00:00

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

2019-02-14T14:11:18+00:00

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

2019-02-13T18:45:17+00:00

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

SUNRPC discard cr_uid from struct rpc_cred.

2018-12-19T18:52:46+00:00

Just use ->cr_cred->fsuid directly. Signed-off-by: NeilBrown Signed-off-by: Anna Schumaker