fs/nfsd/xdr4cb.h

File Facts

System

Linux kernel

Corpus path

fs/nfsd/xdr4cb.h

Extension

.h

Size

2889 bytes

Lines

82

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.

Dependency Surface

• No C-style include directives detected by the generator.

Detected Declarations

• No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

#define NFS4_MAXTAGLEN		20

#define NFS4_enc_cb_null_sz		0
#define NFS4_dec_cb_null_sz		0
#define cb_compound_enc_hdr_sz		4
#define cb_compound_dec_hdr_sz		(3 + (NFS4_MAXTAGLEN >> 2))
#define sessionid_sz			(NFS4_MAX_SESSIONID_LEN >> 2)
#define enc_referring_call4_sz		(1 + 1)
#define enc_referring_call_list4_sz	(sessionid_sz + 1 + \
					enc_referring_call4_sz)
#define cb_sequence_enc_sz		(sessionid_sz + 4 +             \
					enc_referring_call_list4_sz)
#define cb_sequence_dec_sz		(op_dec_sz + sessionid_sz + 4)

#define op_enc_sz			1
#define op_dec_sz			2
#define enc_nfs4_fh_sz			(1 + (NFS4_FHSIZE >> 2))
#define enc_stateid_sz			(NFS4_STATEID_SIZE >> 2)
#define NFS4_enc_cb_recall_sz		(cb_compound_enc_hdr_sz +       \
					cb_sequence_enc_sz +            \
					1 + enc_stateid_sz +            \
					enc_nfs4_fh_sz)

#define NFS4_dec_cb_recall_sz		(cb_compound_dec_hdr_sz  +      \
					cb_sequence_dec_sz +            \
					op_dec_sz)
#define NFS4_enc_cb_layout_sz		(cb_compound_enc_hdr_sz +       \
					cb_sequence_enc_sz +            \
					1 + 3 +                         \
					enc_nfs4_fh_sz + 4)
#define NFS4_dec_cb_layout_sz		(cb_compound_dec_hdr_sz  +      \
					cb_sequence_dec_sz +            \
					op_dec_sz)

#define NFS4_enc_cb_notify_lock_sz	(cb_compound_enc_hdr_sz +        \
					cb_sequence_enc_sz +             \
					2 + 1 +				 \
					XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
					enc_nfs4_fh_sz)
#define NFS4_dec_cb_notify_lock_sz	(cb_compound_dec_hdr_sz  +      \
					cb_sequence_dec_sz +            \
					op_dec_sz)
#define enc_cb_offload_info_sz		(1 + 1 + 2 + 1 +		\
					XDR_QUADLEN(NFS4_VERIFIER_SIZE))
#define NFS4_enc_cb_offload_sz		(cb_compound_enc_hdr_sz +       \
					cb_sequence_enc_sz +            \
					enc_nfs4_fh_sz +		\
					enc_stateid_sz +		\
					enc_cb_offload_info_sz)
#define NFS4_dec_cb_offload_sz		(cb_compound_dec_hdr_sz  +      \
					cb_sequence_dec_sz +            \
					op_dec_sz)
#define NFS4_enc_cb_recall_any_sz	(cb_compound_enc_hdr_sz +       \
					cb_sequence_enc_sz +            \
					1 + 1 + 1)
#define NFS4_dec_cb_recall_any_sz	(cb_compound_dec_hdr_sz  +      \
					cb_sequence_dec_sz +            \
					op_dec_sz)

/*
 * 1: CB_GETATTR opcode (32-bit)
 * N: file_handle
 * 1: number of entry in attribute array (32-bit)
 * 3: entry 0-2 in attribute array (32-bit * 3)
 */
#define NFS4_enc_cb_getattr_sz		(cb_compound_enc_hdr_sz +       \
					cb_sequence_enc_sz +            \
					1 + enc_nfs4_fh_sz + 1 + 3)
/*
 * 4: fattr_bitmap_maxsz
 * 1: attribute array len
 * 2: change attr (64-bit)
 * 2: size (64-bit)
 * 2: atime.seconds (64-bit)
 * 1: atime.nanoseconds (32-bit)
 * 2: mtime.seconds (64-bit)
 * 1: mtime.nanoseconds (32-bit)
 */
#define NFS4_dec_cb_getattr_sz		(cb_compound_dec_hdr_sz  +      \
			cb_sequence_dec_sz + 4 + 1 + 2 + 2 + 2 + 1 + 2 + 1 + op_dec_sz)

Annotation

• 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.