include/linux/ceph/pagelist.h

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

File Facts

System
Linux kernel
Corpus path
include/linux/ceph/pagelist.h
Extension
.h
Size
1567 bytes
Lines
61
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 ceph_pagelist {
	struct list_head head;
	void *mapped_tail;
	size_t length;
	size_t room;
	struct list_head free_list;
	size_t num_pages_free;
	refcount_t refcnt;
};

struct ceph_pagelist *ceph_pagelist_alloc(gfp_t gfp_flags);

extern void ceph_pagelist_release(struct ceph_pagelist *pl);

extern int ceph_pagelist_append(struct ceph_pagelist *pl, const void *d, size_t l);

extern int ceph_pagelist_reserve(struct ceph_pagelist *pl, size_t space);

extern int ceph_pagelist_free_reserve(struct ceph_pagelist *pl);

static inline int ceph_pagelist_encode_64(struct ceph_pagelist *pl, u64 v)
{
	__le64 ev = cpu_to_le64(v);
	return ceph_pagelist_append(pl, &ev, sizeof(ev));
}
static inline int ceph_pagelist_encode_32(struct ceph_pagelist *pl, u32 v)
{
	__le32 ev = cpu_to_le32(v);
	return ceph_pagelist_append(pl, &ev, sizeof(ev));
}
static inline int ceph_pagelist_encode_16(struct ceph_pagelist *pl, u16 v)
{
	__le16 ev = cpu_to_le16(v);
	return ceph_pagelist_append(pl, &ev, sizeof(ev));
}
static inline int ceph_pagelist_encode_8(struct ceph_pagelist *pl, u8 v)
{
	return ceph_pagelist_append(pl, &v, 1);
}
static inline int ceph_pagelist_encode_string(struct ceph_pagelist *pl,
					      char *s, u32 len)
{
	int ret = ceph_pagelist_encode_32(pl, len);
	if (ret)
		return ret;
	if (len)
		return ceph_pagelist_append(pl, s, len);
	return 0;
}

#endif

Annotation

Implementation Notes