include/linux/nfs4.h

File Facts

System

Linux kernel

Corpus path

include/linux/nfs4.h

Extension

.h

Size

25237 bytes

Lines

919

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.

• 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

• linux/list.h
• linux/uidgid.h
• uapi/linux/nfs4.h
• linux/sunrpc/msg_prot.h
• linux/sunrpc/xdrgen/nfs4_1.h

Detected Declarations

• struct nfs4_ace
• struct nfs4_acl
• struct nfs4_label
• struct nfs4_stateid_struct
• struct nfs4_sessionid
• struct nfs4_deviceid
• struct nfs4_op_map
• struct nfs42_netaddr
• struct nl4_server
• enum nfs4_acl_whotype
• enum nfs_opnum4
• enum nfsstat4
• enum nfs_ftype4
• enum open_claim_type4
• enum opentype4
• enum createmode4
• enum limit_by4
• enum nfs4_open_delegation_type4
• enum why_no_delegation4
• enum lock_type4
• enum state_protect_how4
• enum gddrnf4_status
• enum pnfs_layouttype
• enum pnfs_layoutreturn_type
• enum pnfs_iomode
• enum pnfs_notify_deviceid_type4
• enum pnfs_block_volume_type
• enum pnfs_block_extent_state
• enum scsi_code_set
• enum scsi_designator_type
• enum filelayout_hint_care4
• enum data_content4
• enum pnfs_update_layout_reason
• enum netloc_type4
• enum nfs4_change_attr_type
• enum nfs4_setxattr_options
• enum nfs_cb_opnum4
• function seqid_mutating_err

Annotated Snippet

struct nfs4_ace {
	uint32_t	type;
	uint32_t	flag;
	uint32_t	access_mask;
	int		whotype;
	union {
		kuid_t	who_uid;
		kgid_t	who_gid;
	};
};

struct nfs4_acl {
	uint32_t	naces;
	struct nfs4_ace	aces[];
};

#define NFS4_MAXLABELLEN	2048

struct nfs4_label {
	uint32_t	lfs;
	uint32_t	pi;
	u32		lsmid;
	u32		len;
	char	*label;
};

typedef struct { char data[NFS4_VERIFIER_SIZE]; } nfs4_verifier;

struct nfs4_stateid_struct {
	union {
		char data[NFS4_STATEID_SIZE];
		struct {
			__be32 seqid;
			char other[NFS4_STATEID_OTHER_SIZE];
		} __attribute__ ((packed));
	};

	enum {
		NFS4_INVALID_STATEID_TYPE = 0,
		NFS4_SPECIAL_STATEID_TYPE,
		NFS4_OPEN_STATEID_TYPE,
		NFS4_LOCK_STATEID_TYPE,
		NFS4_DELEGATION_STATEID_TYPE,
		NFS4_LAYOUT_STATEID_TYPE,
		NFS4_PNFS_DS_STATEID_TYPE,
		NFS4_REVOKED_STATEID_TYPE,
		NFS4_FREED_STATEID_TYPE,
	} type;
};

typedef struct nfs4_stateid_struct nfs4_stateid;

enum nfs_opnum4 {
	OP_ACCESS = 3,
	OP_CLOSE = 4,
	OP_COMMIT = 5,
	OP_CREATE = 6,
	OP_DELEGPURGE = 7,
	OP_DELEGRETURN = 8,
	OP_GETATTR = 9,
	OP_GETFH = 10,
	OP_LINK = 11,
	OP_LOCK = 12,
	OP_LOCKT = 13,
	OP_LOCKU = 14,
	OP_LOOKUP = 15,
	OP_LOOKUPP = 16,
	OP_NVERIFY = 17,
	OP_OPEN = 18,
	OP_OPENATTR = 19,
	OP_OPEN_CONFIRM = 20,
	OP_OPEN_DOWNGRADE = 21,
	OP_PUTFH = 22,
	OP_PUTPUBFH = 23,
	OP_PUTROOTFH = 24,
	OP_READ = 25,
	OP_READDIR = 26,
	OP_READLINK = 27,
	OP_REMOVE = 28,
	OP_RENAME = 29,
	OP_RENEW = 30,
	OP_RESTOREFH = 31,
	OP_SAVEFH = 32,
	OP_SECINFO = 33,
	OP_SETATTR = 34,
	OP_SETCLIENTID = 35,
	OP_SETCLIENTID_CONFIRM = 36,
	OP_VERIFY = 37,
	OP_WRITE = 38,
	OP_RELEASE_LOCKOWNER = 39,

Annotation

• Immediate include surface: `linux/list.h`, `linux/uidgid.h`, `uapi/linux/nfs4.h`, `linux/sunrpc/msg_prot.h`, `linux/sunrpc/xdrgen/nfs4_1.h`.
• Detected declarations: `struct nfs4_ace`, `struct nfs4_acl`, `struct nfs4_label`, `struct nfs4_stateid_struct`, `struct nfs4_sessionid`, `struct nfs4_deviceid`, `struct nfs4_op_map`, `struct nfs42_netaddr`, `struct nl4_server`, `enum nfs4_acl_whotype`.
• Atlas domain: Core OS / Core Kernel Interface.
• 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.