include/linux/sunrpc/rpc_pipe_fs.h

Source file repositories/reference/linux-study-clean/include/linux/sunrpc/rpc_pipe_fs.h

File Facts

System
Linux kernel
Corpus path
include/linux/sunrpc/rpc_pipe_fs.h
Extension
.h
Size
3928 bytes
Lines
139
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

struct rpc_pipe_dir_head {
	struct list_head pdh_entries;
	struct dentry *pdh_dentry;
};

struct rpc_pipe_dir_object_ops;
struct rpc_pipe_dir_object {
	struct list_head pdo_head;
	const struct rpc_pipe_dir_object_ops *pdo_ops;

	void *pdo_data;
};

struct rpc_pipe_dir_object_ops {
	int (*create)(struct dentry *dir,
			struct rpc_pipe_dir_object *pdo);
	void (*destroy)(struct dentry *dir,
			struct rpc_pipe_dir_object *pdo);
};

struct rpc_pipe_msg {
	struct list_head list;
	void *data;
	size_t len;
	size_t copied;
	int errno;
};

struct rpc_pipe_ops {
	ssize_t (*upcall)(struct file *, struct rpc_pipe_msg *, char __user *, size_t);
	ssize_t (*downcall)(struct file *, const char __user *, size_t);
	void (*release_pipe)(struct inode *);
	int (*open_pipe)(struct inode *);
	void (*destroy_msg)(struct rpc_pipe_msg *);
};

struct rpc_pipe {
	struct list_head pipe;
	struct list_head in_upcall;
	struct list_head in_downcall;
	int pipelen;
	int nreaders;
	int nwriters;
#define RPC_PIPE_WAIT_FOR_OPEN	1
	int flags;
	struct delayed_work queue_timeout;
	const struct rpc_pipe_ops *ops;
	spinlock_t lock;
	struct dentry *dentry;
};

struct rpc_inode {
	struct inode vfs_inode;
	void *private;
	struct rpc_pipe *pipe;
	wait_queue_head_t waitq;
};

static inline struct rpc_inode *
RPC_I(struct inode *inode)
{
	return container_of(inode, struct rpc_inode, vfs_inode);
}

enum {
	SUNRPC_PIPEFS_NFS_PRIO,
	SUNRPC_PIPEFS_RPC_PRIO,
};

extern int rpc_pipefs_notifier_register(struct notifier_block *);
extern void rpc_pipefs_notifier_unregister(struct notifier_block *);

enum {
	RPC_PIPEFS_MOUNT,
	RPC_PIPEFS_UMOUNT,
};

extern struct dentry *rpc_d_lookup_sb(const struct super_block *sb,
				      const unsigned char *dir_name);
extern int rpc_pipefs_init_net(struct net *net);
extern void rpc_pipefs_exit_net(struct net *net);
extern struct super_block *rpc_get_sb_net(const struct net *net);
extern void rpc_put_sb_net(const struct net *net);

extern ssize_t rpc_pipe_generic_upcall(struct file *, struct rpc_pipe_msg *,
				       char __user *, size_t);
extern int rpc_queue_upcall(struct rpc_pipe *, struct rpc_pipe_msg *);

/* returns true if the msg is in-flight, i.e., already eaten by the peer */
static inline bool rpc_msg_is_inflight(const struct rpc_pipe_msg *msg) {

Annotation

Implementation Notes