fs/smb/client/smbdirect.h

File Facts

System

Linux kernel

Corpus path

fs/smb/client/smbdirect.h

Extension

.h

Size

2296 bytes

Lines

68

Domain

Core OS

Bucket

VFS And Filesystem Core

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.

• Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• cifsglob.h
• linux/smbdirect.h

Detected Declarations

• struct smbd_connection
• struct smbd_connection
• function smbd_reconnect
• function smbd_destroy
• function smbd_send

Annotated Snippet

struct smbd_connection {
	struct smbdirect_socket *socket;
};

/* Create a SMBDirect session */
struct smbd_connection *smbd_get_connection(
	struct TCP_Server_Info *server, struct sockaddr *dstaddr);

const struct smbdirect_socket_parameters *smbd_get_parameters(struct smbd_connection *conn);

/* Reconnect SMBDirect session */
int smbd_reconnect(struct TCP_Server_Info *server);
/* Destroy SMBDirect session */
void smbd_destroy(struct TCP_Server_Info *server);

/* Interface for carrying upper layer I/O through send/recv */
int smbd_recv(struct smbd_connection *info, struct msghdr *msg);
int smbd_send(struct TCP_Server_Info *server,
	int num_rqst, struct smb_rqst *rqst);

/* Interfaces to register and deregister MR for RDMA read/write */
struct smbdirect_mr_io *smbd_register_mr(
	struct smbd_connection *info, struct iov_iter *iter,
	bool writing, bool need_invalidate);
void smbd_mr_fill_buffer_descriptor(struct smbdirect_mr_io *mr,
				    struct smbdirect_buffer_descriptor_v1 *v1);
void smbd_deregister_mr(struct smbdirect_mr_io *mr);

void smbd_debug_proc_show(struct TCP_Server_Info *server, struct seq_file *m);

#else
#define cifs_rdma_enabled(server)	0
struct smbd_connection {};
static inline void *smbd_get_connection(
	struct TCP_Server_Info *server, struct sockaddr *dstaddr) {return NULL;}
static inline int smbd_reconnect(struct TCP_Server_Info *server) {return -1; }
static inline void smbd_destroy(struct TCP_Server_Info *server) {}
static inline int smbd_recv(struct smbd_connection *info, struct msghdr *msg) {return -1; }
static inline int smbd_send(struct TCP_Server_Info *server, int num_rqst, struct smb_rqst *rqst) {return -1; }
#endif

#endif

Annotation

• Immediate include surface: `cifsglob.h`, `linux/smbdirect.h`.
• Detected declarations: `struct smbd_connection`, `struct smbd_connection`, `function smbd_reconnect`, `function smbd_destroy`, `function smbd_send`.
• Atlas domain: Core OS / VFS And Filesystem Core.
• Implementation status: source implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.