/************************************************************************** * * snaplog.h * * Snapshot log on-disk data structure. * */ #include "radix.h" #include "blockstore.h" /* for BLOCK_SIZE */ #ifndef __SNAPLOG_H__ #define __SNAPLOG_H__ typedef struct snap_id { u64 block; unsigned int index; } snap_id_t; typedef struct snap_rec { u64 radix_root; struct timeval timestamp; /* flags: */ unsigned deleted:1; } snap_rec_t; int snap_block_create(snap_id_t *parent_id, snap_id_t *new_id); int snap_append(snap_id_t *id, snap_rec_t *rec, snap_id_t *new_id); int snap_collapse(int height, snap_id_t *p_id, snap_id_t *c_id); void snap_print_history(snap_id_t *snap_id); int snap_get_id(snap_id_t *id, snap_rec_t *target); /* exported for vdi debugging */ #define SNAP_MAGIC 0xff00ff0aa0ff00ffLL static const snap_id_t null_snap_id = { 0, 0 }; typedef struct snap_block_hdr { u64 magic; snap_id_t parent_block; /* parent block within this chain */ snap_id_t fork_block; /* where this log was forked */ unsigned log_entries; /* total entries since forking */ unsigned short nr_entries; /* entries in snaps[] */ unsigned short immutable; /* has this snap page become immutable? */ } snap_block_hdr_t; #define SNAPS_PER_BLOCK \ ((BLOCK_SIZE - sizeof(snap_block_hdr_t)) / sizeof(snap_rec_t)) typedef struct snap_block { snap_block_hdr_t hdr; snap_rec_t snaps[SNAPS_PER_BLOCK]; } snap_block_t; snap_block_t *snap_get_block(u64 block); #endif /* __SNAPLOG_H__ */ proxy/tree/libmproxy/contrib/README?id=e65a8659f00fb949d15f9af9fefd72df48abe9af'>treecommit diff stats

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