From a52458b48af142bcc2b72fe810c0db20cfae7fdd Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Mon, 3 Dec 2018 11:30:31 +1100 Subject: NFS/NFSD/SUNRPC: replace generic creds with 'struct cred'. SUNRPC has two sorts of credentials, both of which appear as "struct rpc_cred". There are "generic credentials" which are supplied by clients such as NFS and passed in 'struct rpc_message' to indicate which user should be used to authorize the request, and there are low-level credentials such as AUTH_NULL, AUTH_UNIX, AUTH_GSS which describe the credential to be sent over the wires. This patch replaces all the generic credentials by 'struct cred' pointers - the credential structure used throughout Linux. For machine credentials, there is a special 'struct cred *' pointer which is statically allocated and recognized where needed as having a special meaning. A look-up of a low-level cred will map this to a machine credential. Signed-off-by: NeilBrown Acked-by: J. Bruce Fields Signed-off-by: Anna Schumaker --- include/linux/nfs_fs.h | 6 +++--- include/linux/nfs_xdr.h | 14 +++++++------- include/linux/sunrpc/auth.h | 18 +----------------- include/linux/sunrpc/sched.h | 2 +- 4 files changed, 12 insertions(+), 28 deletions(-) (limited to 'include/linux') diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h index 271015e55d0f..40e30376130b 100644 --- a/include/linux/nfs_fs.h +++ b/include/linux/nfs_fs.h @@ -70,7 +70,7 @@ struct nfs_open_context { struct nfs_lock_context lock_context; fl_owner_t flock_owner; struct dentry *dentry; - struct rpc_cred *cred; + const struct cred *cred; struct rpc_cred *ll_cred; /* low-level cred - use to check for expiry */ struct nfs4_state *state; fmode_t mode; @@ -391,7 +391,7 @@ extern void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, struct nfs4_label *label); extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx); extern void put_nfs_open_context(struct nfs_open_context *ctx); -extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode); +extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, const struct cred *cred, fmode_t mode); extern struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode, struct file *filp); extern void nfs_inode_attach_open_context(struct nfs_open_context *ctx); extern void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx); @@ -462,7 +462,7 @@ static inline struct nfs_open_context *nfs_file_open_context(struct file *filp) return filp->private_data; } -static inline struct rpc_cred *nfs_file_cred(struct file *file) +static inline const struct cred *nfs_file_cred(struct file *file) { if (file != NULL) { struct nfs_open_context *ctx = diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h index cd489e2e0979..441a93ebcac0 100644 --- a/include/linux/nfs_xdr.h +++ b/include/linux/nfs_xdr.h @@ -270,7 +270,7 @@ struct nfs4_layoutget_res { struct nfs4_layoutget { struct nfs4_layoutget_args args; struct nfs4_layoutget_res res; - struct rpc_cred *cred; + const struct cred *cred; gfp_t gfp_flags; }; @@ -309,7 +309,7 @@ struct nfs4_layoutcommit_data { struct rpc_task task; struct nfs_fattr fattr; struct list_head lseg_list; - struct rpc_cred *cred; + const struct cred *cred; struct inode *inode; struct nfs4_layoutcommit_args args; struct nfs4_layoutcommit_res res; @@ -334,7 +334,7 @@ struct nfs4_layoutreturn_res { struct nfs4_layoutreturn { struct nfs4_layoutreturn_args args; struct nfs4_layoutreturn_res res; - struct rpc_cred *cred; + const struct cred *cred; struct nfs_client *clp; struct inode *inode; int rpc_status; @@ -1469,7 +1469,7 @@ enum { struct nfs_io_completion; struct nfs_pgio_header { struct inode *inode; - struct rpc_cred *cred; + const struct cred *cred; struct list_head pages; struct nfs_page *req; struct nfs_writeverf verf; /* Used for writes */ @@ -1529,7 +1529,7 @@ struct nfs_commit_info { struct nfs_commit_data { struct rpc_task task; struct inode *inode; - struct rpc_cred *cred; + const struct cred *cred; struct nfs_fattr fattr; struct nfs_writeverf verf; struct list_head pages; /* Coalesced requests we wish to flush */ @@ -1560,7 +1560,7 @@ struct nfs_unlinkdata { struct nfs_removeres res; struct dentry *dentry; wait_queue_head_t wq; - struct rpc_cred *cred; + const struct cred *cred; struct nfs_fattr dir_attr; long timeout; }; @@ -1568,7 +1568,7 @@ struct nfs_unlinkdata { struct nfs_renamedata { struct nfs_renameargs args; struct nfs_renameres res; - struct rpc_cred *cred; + const struct cred *cred; struct inode *old_dir; struct dentry *old_dentry; struct nfs_fattr old_fattr; diff --git a/include/linux/sunrpc/auth.h b/include/linux/sunrpc/auth.h index d8cf742f8032..a43e065a0b07 100644 --- a/include/linux/sunrpc/auth.h +++ b/include/linux/sunrpc/auth.h @@ -67,7 +67,7 @@ struct rpc_cred { #define RPCAUTH_CRED_HASHED 2 #define RPCAUTH_CRED_NEGATIVE 3 -struct rpc_cred *rpc_machine_cred(void); +const struct cred *rpc_machine_cred(void); /* * Client authentication handle @@ -196,21 +196,5 @@ struct rpc_cred *get_rpccred(struct rpc_cred *cred) return NULL; } -/** - * get_rpccred_rcu - get a reference to a cred using rcu-protected pointer - * @cred: cred of which to take a reference - * - * In some cases, we may have a pointer to a credential to which we - * want to take a reference, but don't already have one. Because these - * objects are freed using RCU, we can access the cr_count while its - * on its way to destruction and only take a reference if it's not already - * zero. - */ -static inline struct rpc_cred * -get_rpccred_rcu(struct rpc_cred *cred) -{ - return get_rpccred(cred); -} - #endif /* __KERNEL__ */ #endif /* _LINUX_SUNRPC_AUTH_H */ diff --git a/include/linux/sunrpc/sched.h b/include/linux/sunrpc/sched.h index 4e2b893b83a8..219aa3910a0c 100644 --- a/include/linux/sunrpc/sched.h +++ b/include/linux/sunrpc/sched.h @@ -26,7 +26,7 @@ struct rpc_message { const struct rpc_procinfo *rpc_proc; /* Procedure information */ void * rpc_argp; /* Arguments */ void * rpc_resp; /* Result */ - struct rpc_cred * rpc_cred; /* Credentials */ + const struct cred * rpc_cred; /* Credentials */ }; struct rpc_call_ops; -- cgit v1.2.3-59-g8ed1b