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lib
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modules
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6.8.0-36-generic
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include
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linux
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ceph
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pagelist.h
/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __FS_CEPH_PAGELIST_H #define __FS_CEPH_PAGELIST_H #include <asm/byteorder.h> #include <linux/refcount.h> #include <linux/list.h> #include <linux/types.h> 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_cursor { struct ceph_pagelist *pl; /* pagelist, for error checking */ struct list_head *page_lru; /* page in list */ size_t room; /* room remaining to reset to */ }; 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); extern void ceph_pagelist_set_cursor(struct ceph_pagelist *pl, struct ceph_pagelist_cursor *c); extern int ceph_pagelist_truncate(struct ceph_pagelist *pl, struct ceph_pagelist_cursor *c); 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
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