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cleaner.h revision 1.11 
      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 	union {
     20 		struct dlfs u_32;
     21 		struct dlfs64 u_64;
     22 	} lfs_dlfs_u;
     23 	unsigned lfs_is64 : 1;
     24 
     25 	/* Ifile */
     26 	int clfs_ifilefd;	   /* Ifile file descriptor */
     27 	struct uvnode *lfs_ivnode; /* Ifile vnode */
     28 	struct lfs_fhandle clfs_ifilefh;	   /* Ifile file handle */
     29 
     30 	/* Device */
     31 	int clfs_devfd;		   /* Device file descriptor */
     32 	struct uvnode *clfs_devvp; /* Device vnode */
     33 	char *clfs_dev;		   /* Name of device */
     34 
     35 	/* Cache of segment status */
     36 	struct clfs_seguse  *clfs_segtab;  /* Abbreviated seguse table */
     37 	struct clfs_seguse **clfs_segtabp; /* pointers to same */
     38 
     39 	/* Progress status */
     40 	int clfs_nactive;	   /* How many segments' blocks we have */
     41 	int clfs_onhold;	   /* If cleaning this fs is on hold */
     42 };
     43 
     44 /*
     45  * Get lfs accessors that use struct clfs. This must come after the
     46  * definition of struct clfs. (blah)
     47  */
     48 #define STRUCT_LFS struct clfs
     49 #include <ufs/lfs/lfs_accessors.h>
     50 
     51 /*
     52  * Fraction of the could-be-clean segments required to be clean.
     53  */
     54 #define BUSY_LIM 0.5
     55 #define IDLE_LIM 0.9
     56 
     57 __BEGIN_DECLS
     58 
     59 /* lfs_cleanerd.c */
     60 void pwarn(const char *, ...);
     61 void calc_cb(struct clfs *, int, struct clfs_seguse *);
     62 int clean_fs(struct clfs *, CLEANERINFO *);
     63 void dlog(const char *, ...);
     64 void handle_error(struct clfs **, int);
     65 int init_fs(struct clfs *, char *);
     66 int invalidate_segment(struct clfs *, int);
     67 void lfs_ientry(IFILE **, struct clfs *, ino_t, struct ubuf **);
     68 int load_segment(struct clfs *, int, BLOCK_INFO **, int *);
     69 int needs_cleaning(struct clfs *, CLEANERINFO *);
     70 int reinit_fs(struct clfs *);
     71 void reload_ifile(struct clfs *);
     72 void toss_old_blocks(struct clfs *, BLOCK_INFO **, int *, int *);
     73 
     74 /* cleansrv.c */
     75 void check_control_socket(void);
     76 void try_to_become_master(int, char **);
     77 
     78 /* coalesce.c */
     79 int log2int(int);
     80 int clean_all_inodes(struct clfs *);
     81 int fork_coalesce(struct clfs *);
     82 
     83 __END_DECLS
     84 
     85 #endif /* CLEANER_H_ */
     86