include/linux/nd.h

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

File Facts

System
Linux kernel
Corpus path
include/linux/nd.h
Extension
.h
Size
6342 bytes
Lines
207
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: operation-table or driver-model contract
Status
pattern 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 device_driver drv;
	unsigned long type;
	int (*probe)(struct device *dev);
	void (*remove)(struct device *dev);
	void (*shutdown)(struct device *dev);
	void (*notify)(struct device *dev, enum nvdimm_event event);
};

#define to_nd_device_driver(__drv)	container_of_const(__drv, struct nd_device_driver, drv)

/**
 * struct nd_namespace_common - core infrastructure of a namespace
 * @force_raw: ignore other personalities for the namespace (e.g. btt)
 * @dev: device model node
 * @claim: when set a another personality has taken ownership of the namespace
 * @claim_class: restrict claim type to a given class
 * @rw_bytes: access the raw namespace capacity with byte-aligned transfers
 */
struct nd_namespace_common {
	int force_raw;
	struct device dev;
	struct device *claim;
	enum nvdimm_claim_class claim_class;
	int (*rw_bytes)(struct nd_namespace_common *, resource_size_t offset,
			void *buf, size_t size, int rw, unsigned long flags);
};

static inline struct nd_namespace_common *to_ndns(struct device *dev)
{
	return container_of(dev, struct nd_namespace_common, dev);
}

/**
 * struct nd_namespace_io - device representation of a persistent memory range
 * @dev: namespace device created by the nd region driver
 * @res: struct resource conversion of a NFIT SPA table
 * @size: cached resource_size(@res) for fast path size checks
 * @addr: virtual address to access the namespace range
 * @bb: badblocks list for the namespace range
 */
struct nd_namespace_io {
	struct nd_namespace_common common;
	struct resource res;
	resource_size_t size;
	void *addr;
	struct badblocks bb;
};

/**
 * struct nd_namespace_pmem - namespace device for dimm-backed interleaved memory
 * @nsio: device and system physical address range to drive
 * @lbasize: logical sector size for the namespace in block-device-mode
 * @alt_name: namespace name supplied in the dimm label
 * @uuid: namespace name supplied in the dimm label
 * @id: ida allocated id
 */
struct nd_namespace_pmem {
	struct nd_namespace_io nsio;
	unsigned long lbasize;
	char *alt_name;
	uuid_t *uuid;
	int id;
};

static inline struct nd_namespace_io *to_nd_namespace_io(const struct device *dev)
{
	return container_of(dev, struct nd_namespace_io, common.dev);
}

static inline struct nd_namespace_pmem *to_nd_namespace_pmem(const struct device *dev)
{
	struct nd_namespace_io *nsio = to_nd_namespace_io(dev);

	return container_of(nsio, struct nd_namespace_pmem, nsio);
}

/**
 * nvdimm_read_bytes() - synchronously read bytes from an nvdimm namespace
 * @ndns: device to read
 * @offset: namespace-relative starting offset
 * @buf: buffer to fill
 * @size: transfer length
 *
 * @buf is up-to-date upon return from this routine.
 */
static inline int nvdimm_read_bytes(struct nd_namespace_common *ndns,
		resource_size_t offset, void *buf, size_t size,
		unsigned long flags)
{
	return ndns->rw_bytes(ndns, offset, buf, size, READ, flags);

Annotation

Implementation Notes