libexec/lfs_cleanerd/cleaner.h

   1 #ifndef CLEANER_H_
   2 #define CLEANER_H_
   3
   4 /*
   5  * An abbreviated version of the SEGUSE data structure.
   6  */
   7 struct clfs_seguse {
   8         u_int32_t nbytes;
   9         u_int32_t nsums;
  10         u_int32_t flags;
  11         u_int64_t lastmod;
  12         u_int64_t priority;
  13 };
  14
  15 /*
  16  * The cleaner's view of the superblock data structure.
  17  */
  18 struct clfs {
  19         struct dlfs lfs_dlfs;      /* Leverage LFS lfs_* defines here */
  20
  21         /* Ifile */
  22         int clfs_ifilefd;          /* Ifile file descriptor */
  23         struct uvnode *lfs_ivnode; /* Ifile vnode */
  24         struct lfs_fhandle clfs_ifilefh;           /* Ifile file handle */
  25
  26         /* Device */
  27         int clfs_devfd;            /* Device file descriptor */
  28         struct uvnode *clfs_devvp; /* Device vnode */
  29         char *clfs_dev;            /* Name of device */
  30
  31         /* Cache of segment status */
  32         struct clfs_seguse  *clfs_segtab;  /* Abbreviated seguse table */
  33         struct clfs_seguse **clfs_segtabp; /* pointers to same */
  34
  35         /* Progress status */
  36         int clfs_nactive;          /* How many segments' blocks we have */
  37         int clfs_onhold;           /* If cleaning this fs is on hold */
  38 };
  39
  40 /*
  41  * Fraction of the could-be-clean segments required to be clean.
  42  */
  43 #define BUSY_LIM 0.5
  44 #define IDLE_LIM 0.9
  45
  46 __BEGIN_DECLS
  47
  48 /* lfs_cleanerd.c */
  49 void pwarn(const char *, ...);
  50 void calc_cb(struct clfs *, int, struct clfs_seguse *);
  51 int clean_fs(struct clfs *, CLEANERINFO *);
  52 void dlog(const char *, ...);
  53 void handle_error(struct clfs **, int);
  54 int init_fs(struct clfs *, char *);
  55 int invalidate_segment(struct clfs *, int);
  56 void lfs_ientry(IFILE **, struct clfs *, ino_t, struct ubuf **);
  57 int load_segment(struct clfs *, int, BLOCK_INFO **, int *);
  58 int needs_cleaning(struct clfs *, CLEANERINFO *);
  59 int32_t parse_pseg(struct clfs *, daddr_t, BLOCK_INFO **, int *);
  60 int reinit_fs(struct clfs *);
  61 void reload_ifile(struct clfs *);
  62 void toss_old_blocks(struct clfs *, BLOCK_INFO **, int *, int *);
  63
  64 /* cleansrv.c */
  65 void check_control_socket(void);
  66 void try_to_become_master(int, char **);
  67
  68 /* coalesce.c */
  69 int log2int(int);
  70 int clean_all_inodes(struct clfs *);
  71 int fork_coalesce(struct clfs *);
  72
  73 __END_DECLS
  74
  75 #endif /* CLEANER_H_ */