src/solver.h

   1 /*
   2  * Copyright (c) 2007, Novell Inc.
   3  *
   4  * This program is licensed under the BSD license, read LICENSE.BSD
   5  * for further information
   6  */
   7
   8 /*
   9  * solver.h
  10  *
  11  */
  12
  13 #ifndef LIBSOLV_SOLVER_H
  14 #define LIBSOLV_SOLVER_H
  15
  16 #include "pooltypes.h"
  17 #include "pool.h"
  18 #include "repo.h"
  19 #include "queue.h"
  20 #include "bitmap.h"
  21 #include "transaction.h"
  22 #include "rules.h"
  23 #include "problems.h"
  24
  25 #ifdef __cplusplus
  26 extern "C" {
  27 #endif
  28
  29 struct _Solver {
  30   Pool *pool;                           /* back pointer to pool */
  31   Queue job;                            /* copy of the job we're solving */
  32
  33   int (*solution_callback)(struct _Solver *solv, void *data);
  34   void *solution_callback_data;
  35
  36   int pooljobcnt;                       /* number of pooljob entries in job queue */
  37
  38 #ifdef LIBSOLV_INTERNAL
  39   Repo *installed;                      /* copy of pool->installed */
  40
  41   /* list of rules, ordered
  42    * pkg rules first, then features, updates, jobs, learnt
  43    * see start/end offsets below
  44    */
  45   Rule *rules;                          /* all rules */
  46   Id nrules;                            /* [Offset] index of the last rule */
  47   Id lastpkgrule;                       /* last package rule we added */
  48
  49   Queue ruleassertions;                 /* Queue of all assertion rules */
  50
  51   /* start/end offset for rule 'areas' */
  52
  53   Id pkgrules_end;                      /* [Offset] dep rules end */
  54
  55   Id featurerules;                      /* feature rules start/end */
  56   Id featurerules_end;
  57
  58   Id updaterules;                       /* policy rules, e.g. keep packages installed or update. All literals > 0 */
  59   Id updaterules_end;
  60
  61   Id jobrules;                          /* user rules */
  62   Id jobrules_end;
  63
  64   Id infarchrules;                      /* inferior arch rules */
  65   Id infarchrules_end;
  66
  67   Id duprules;                          /* dist upgrade rules */
  68   Id duprules_end;
  69
  70   Id bestrules;                         /* rules from SOLVER_FORCEBEST */
  71   Id bestrules_end;
  72   Id *bestrules_pkg;
  73
  74   Id yumobsrules;                       /* rules from yum obsoletes handling */
  75   Id yumobsrules_end;
  76   Id *yumobsrules_info;                 /* the dependency for each rule */
  77
  78   Id choicerules;                       /* choice rules (always weak) */
  79   Id choicerules_end;
  80   Id *choicerules_ref;
  81
  82   Id learntrules;                       /* learnt rules, (end == nrules) */
  83
  84   Map noupdate;                         /* don't try to update these
  85                                            installed solvables */
  86   Map multiversion;                     /* ignore obsoletes for these (multiinstall) */
  87
  88   Map updatemap;                        /* bring these installed packages to the newest version */
  89   int updatemap_all;                    /* bring all packages to the newest version */
  90
  91   Map bestupdatemap;                    /* create best rule for those packages */
  92   int bestupdatemap_all;                /* bring all packages to the newest version */
  93
  94   Map fixmap;                           /* fix these packages */
  95   int fixmap_all;                       /* fix all packages */
  96
  97   Queue weakruleq;                      /* index into 'rules' for weak ones */
  98   Map weakrulemap;                      /* map rule# to '1' for weak rules, 1..learntrules */
  99
 100   Id *watches;                          /* Array of rule offsets
 101                                          * watches has nsolvables*2 entries and is addressed from the middle
 102                                          * middle-solvable : decision to conflict, offset point to linked-list of rules
 103                                          * middle+solvable : decision to install: offset point to linked-list of rules
 104                                          */
 105
 106   Queue ruletojob;                      /* index into job queue: jobs for which a rule exits */
 107
 108   /* our decisions: */
 109   Queue decisionq;                      /* >0:install, <0:remove/conflict */
 110   Queue decisionq_why;                  /* index of rule, Offset into rules */
 111   Queue decisionq_reason;               /* reason for decision, indexed by level */
 112
 113   Id *decisionmap;                      /* map for all available solvables,
 114                                          * = 0: undecided
 115                                          * > 0: level of decision when installed,
 116                                          * < 0: level of decision when conflict */
 117
 118   /* learnt rule history */
 119   Queue learnt_why;
 120   Queue learnt_pool;
 121
 122   Queue branches;
 123   int propagate_index;                  /* index into decisionq for non-propagated decisions */
 124
 125   Queue problems;                       /* list of lists of conflicting rules, < 0 for job rules */
 126   Queue solutions;                      /* refined problem storage space */
 127
 128   Queue orphaned;                       /* orphaned packages (to be removed?) */
 129
 130   int stats_learned;                    /* statistic */
 131   int stats_unsolvable;                 /* statistic */
 132
 133   Map recommendsmap;                    /* recommended packages from decisionmap */
 134   Map suggestsmap;                      /* suggested packages from decisionmap */
 135   int recommends_index;                 /* recommendsmap/suggestsmap is created up to this level */
 136   Queue *recommendscplxq;
 137   Queue *suggestscplxq;
 138
 139   Id *obsoletes;                        /* obsoletes for each installed solvable */
 140   Id *obsoletes_data;                   /* data area for obsoletes */
 141   Id *specialupdaters;                  /* updaters for packages with a limited update rule */
 142
 143   /*-------------------------------------------------------------------------------------------------------------
 144    * Solver configuration
 145    *-------------------------------------------------------------------------------------------------------------*/
 146
 147   int allowdowngrade;                   /* allow to downgrade installed solvable */
 148   int allownamechange;                  /* allow to change name of installed solvables */
 149   int allowarchchange;                  /* allow to change architecture of installed solvables */
 150   int allowvendorchange;                /* allow to change vendor of installed solvables */
 151   int allowuninstall;                   /* allow removal of installed solvables */
 152   int noupdateprovide;                  /* true: update packages needs not to provide old package */
 153   int needupdateprovide;                /* true: update packages must provide old package */
 154   int dosplitprovides;                  /* true: consider legacy split provides */
 155   int dontinstallrecommended;           /* true: do not install recommended packages */
 156   int addalreadyrecommended;            /* true: also install recommended packages that were already recommended by the installed packages */
 157   int dontshowinstalledrecommended;     /* true: do not show recommended packages that are already installed */
 158
 159   int noinfarchcheck;                   /* true: do not forbid inferior architectures */
 160   int keepexplicitobsoletes;            /* true: honor obsoletes during multiinstall */
 161   int bestobeypolicy;                   /* true: stay in policy with the best rules */
 162   int noautotarget;                     /* true: do not assume targeted for up/dup jobs that contain no installed solvable */
 163   int focus_installed;                  /* true: resolve update rules first */
 164   int focus_best;                       /* true: resolve job dependencies first */
 165   int do_yum_obsoletes;                 /* true: add special yumobs rules */
 166   int urpmreorder;                      /* true: do special urpm package reordering */
 167   int strongrecommends;                 /* true: create weak rules for recommends */
 168   int install_also_updates;             /* true: do not prune install job rules to installed packages */
 169
 170   int process_orphans;                  /* true: do special orphan processing */
 171   Map dupmap;                           /* dup to those packages */
 172   Map dupinvolvedmap;                   /* packages involved in dup process */
 173   int dupinvolvedmap_all;               /* all packages are involved */
 174   int dup_allowdowngrade;               /* dup mode: allow to downgrade installed solvable */
 175   int dup_allownamechange;              /* dup mode: allow to change name of installed solvable */
 176   int dup_allowarchchange;              /* dup mode: allow to change architecture of installed solvables */
 177   int dup_allowvendorchange;            /* dup mode: allow to change vendor of installed solvables */
 178
 179   Map droporphanedmap;                  /* packages to drop in dup mode */
 180   int droporphanedmap_all;
 181
 182   Map cleandepsmap;                     /* try to drop these packages as of cleandeps erases */
 183
 184   Queue *ruleinfoq;                     /* tmp space for solver_ruleinfo() */
 185
 186   Queue *cleandeps_updatepkgs;          /* packages we update in cleandeps mode */
 187   Queue *cleandeps_mistakes;            /* mistakes we made */
 188
 189   Queue *update_targets;                /* update to specific packages */
 190
 191   Queue *installsuppdepq;               /* deps from the install namespace provides hack */
 192
 193   Queue addedmap_deduceq;               /* deduce addedmap from pkg rules */
 194   Id *instbuddy;                        /* buddies of installed packages */
 195   int keep_orphans;                     /* how to treat orphans */
 196   int break_orphans;                    /* how to treat orphans */
 197   Queue *brokenorphanrules;             /* broken rules of orphaned packages */
 198
 199   Map allowuninstallmap;                /* ok to uninstall those */
 200   int allowuninstall_all;
 201
 202   Queue *favorq;
 203   Map favormap;                         /* favored / disfavored packages */
 204   Map isdisfavormap;
 205
 206   int installedpos;                     /* for resolve_installed */
 207   int do_extra_reordering;              /* reorder for future installed packages */
 208
 209   Queue *recommendsruleq;               /* pkg rules comming from recommends */
 210 #endif  /* LIBSOLV_INTERNAL */
 211 };
 212
 213 typedef struct _Solver Solver;
 214
 215 /*
 216  * queue commands
 217  */
 218
 219 #define SOLVER_SOLVABLE                 0x01
 220 #define SOLVER_SOLVABLE_NAME            0x02
 221 #define SOLVER_SOLVABLE_PROVIDES        0x03
 222 #define SOLVER_SOLVABLE_ONE_OF          0x04
 223 #define SOLVER_SOLVABLE_REPO            0x05
 224 #define SOLVER_SOLVABLE_ALL             0x06
 225
 226 #define SOLVER_SELECTMASK               0xff
 227
 228 #define SOLVER_NOOP                     0x0000
 229 #define SOLVER_INSTALL                  0x0100
 230 #define SOLVER_ERASE                    0x0200
 231 #define SOLVER_UPDATE                   0x0300
 232 #define SOLVER_WEAKENDEPS               0x0400
 233 #define SOLVER_MULTIVERSION             0x0500
 234 #define SOLVER_LOCK                     0x0600
 235 #define SOLVER_DISTUPGRADE              0x0700
 236 #define SOLVER_VERIFY                   0x0800
 237 #define SOLVER_DROP_ORPHANED            0x0900
 238 #define SOLVER_USERINSTALLED            0x0a00
 239 #define SOLVER_ALLOWUNINSTALL           0x0b00
 240 #define SOLVER_FAVOR                    0x0c00
 241 #define SOLVER_DISFAVOR                 0x0d00
 242
 243 #define SOLVER_JOBMASK                  0xff00
 244
 245 #define SOLVER_WEAK                     0x010000
 246 #define SOLVER_ESSENTIAL                0x020000
 247 #define SOLVER_CLEANDEPS                0x040000
 248 /* ORUPDATE makes SOLVER_INSTALL not prune to installed
 249  * packages, thus updating installed packages */
 250 #define SOLVER_ORUPDATE                 0x080000
 251 /* FORCEBEST makes the solver insist on best packages, so
 252  * you will get problem reported if the best package is
 253  * not installable. This can be used with INSTALL, UPDATE
 254  * and DISTUPGRADE */
 255 #define SOLVER_FORCEBEST                0x100000
 256 /* TARGETED is used in up/dup jobs to make the solver
 257  * treat the specified selection as target packages.
 258  * It is automatically assumed if the selection does not
 259  * contain an "installed" package unless the
 260  * NO_AUTOTARGET solver flag is set */
 261 #define SOLVER_TARGETED                 0x200000
 262 /* This (SOLVER_INSTALL) job was automatically added
 263  * and thus does not the add to the userinstalled packages */
 264 #define SOLVER_NOTBYUSER                0x400000
 265
 266 #define SOLVER_SETEV                    0x01000000
 267 #define SOLVER_SETEVR                   0x02000000
 268 #define SOLVER_SETARCH                  0x04000000
 269 #define SOLVER_SETVENDOR                0x08000000
 270 #define SOLVER_SETREPO                  0x10000000
 271 #define SOLVER_NOAUTOSET                0x20000000
 272 #define SOLVER_SETNAME                  0x40000000
 273
 274 #define SOLVER_SETMASK                  0x7f000000
 275
 276 /* legacy */
 277 #define SOLVER_NOOBSOLETES              SOLVER_MULTIVERSION
 278
 279 #define SOLVER_REASON_UNRELATED         0
 280 #define SOLVER_REASON_UNIT_RULE         1
 281 #define SOLVER_REASON_KEEP_INSTALLED    2
 282 #define SOLVER_REASON_RESOLVE_JOB       3
 283 #define SOLVER_REASON_UPDATE_INSTALLED  4
 284 #define SOLVER_REASON_CLEANDEPS_ERASE   5
 285 #define SOLVER_REASON_RESOLVE           6
 286 #define SOLVER_REASON_WEAKDEP           7
 287 #define SOLVER_REASON_RESOLVE_ORPHAN    8
 288
 289 #define SOLVER_REASON_RECOMMENDED       16
 290 #define SOLVER_REASON_SUPPLEMENTED      17
 291
 292
 293 #define SOLVER_FLAG_ALLOW_DOWNGRADE             1
 294 #define SOLVER_FLAG_ALLOW_ARCHCHANGE            2
 295 #define SOLVER_FLAG_ALLOW_VENDORCHANGE          3
 296 #define SOLVER_FLAG_ALLOW_UNINSTALL             4
 297 #define SOLVER_FLAG_NO_UPDATEPROVIDE            5
 298 #define SOLVER_FLAG_SPLITPROVIDES               6
 299 #define SOLVER_FLAG_IGNORE_RECOMMENDED          7
 300 #define SOLVER_FLAG_ADD_ALREADY_RECOMMENDED     8
 301 #define SOLVER_FLAG_NO_INFARCHCHECK             9
 302 #define SOLVER_FLAG_ALLOW_NAMECHANGE            10
 303 #define SOLVER_FLAG_KEEP_EXPLICIT_OBSOLETES     11
 304 #define SOLVER_FLAG_BEST_OBEY_POLICY            12
 305 #define SOLVER_FLAG_NO_AUTOTARGET               13
 306 #define SOLVER_FLAG_DUP_ALLOW_DOWNGRADE         14
 307 #define SOLVER_FLAG_DUP_ALLOW_ARCHCHANGE        15
 308 #define SOLVER_FLAG_DUP_ALLOW_VENDORCHANGE      16
 309 #define SOLVER_FLAG_DUP_ALLOW_NAMECHANGE        17
 310 #define SOLVER_FLAG_KEEP_ORPHANS                18
 311 #define SOLVER_FLAG_BREAK_ORPHANS               19
 312 #define SOLVER_FLAG_FOCUS_INSTALLED             20
 313 #define SOLVER_FLAG_YUM_OBSOLETES               21
 314 #define SOLVER_FLAG_NEED_UPDATEPROVIDE          22
 315 #define SOLVER_FLAG_URPM_REORDER                23
 316 #define SOLVER_FLAG_FOCUS_BEST                  24
 317 #define SOLVER_FLAG_STRONG_RECOMMENDS           25
 318 #define SOLVER_FLAG_INSTALL_ALSO_UPDATES        26
 319
 320 #define GET_USERINSTALLED_NAMES                 (1 << 0)        /* package names instead of ids */
 321 #define GET_USERINSTALLED_INVERTED              (1 << 1)        /* autoinstalled */
 322 #define GET_USERINSTALLED_NAMEARCH              (1 << 2)        /* package/arch tuples instead of ids */
 323
 324 #define SOLVER_ALTERNATIVE_TYPE_RULE            1
 325 #define SOLVER_ALTERNATIVE_TYPE_RECOMMENDS      2
 326 #define SOLVER_ALTERNATIVE_TYPE_SUGGESTS        3
 327
 328 extern Solver *solver_create(Pool *pool);
 329 extern void solver_free(Solver *solv);
 330 extern int  solver_solve(Solver *solv, Queue *job);
 331 extern Transaction *solver_create_transaction(Solver *solv);
 332 extern int solver_set_flag(Solver *solv, int flag, int value);
 333 extern int solver_get_flag(Solver *solv, int flag);
 334
 335 extern int  solver_get_decisionlevel(Solver *solv, Id p);
 336 extern void solver_get_decisionqueue(Solver *solv, Queue *decisionq);
 337 extern int  solver_get_lastdecisionblocklevel(Solver *solv);
 338 extern void solver_get_decisionblock(Solver *solv, int level, Queue *decisionq);
 339
 340 extern void solver_get_orphaned(Solver *solv, Queue *orphanedq);
 341 extern void solver_get_recommendations(Solver *solv, Queue *recommendationsq, Queue *suggestionsq, int noselected);
 342 extern void solver_get_unneeded(Solver *solv, Queue *unneededq, int filtered);
 343 extern void solver_get_userinstalled(Solver *solv, Queue *q, int flags);
 344 extern void pool_add_userinstalled_jobs(Pool *pool, Queue *q, Queue *job, int flags);
 345 extern void solver_get_cleandeps(Solver *solv, Queue *cleandepsq);
 346
 347 extern int  solver_describe_decision(Solver *solv, Id p, Id *infop);
 348 extern void solver_describe_weakdep_decision(Solver *solv, Id p, Queue *whyq);
 349
 350 extern int solver_alternatives_count(Solver *solv);
 351 extern int solver_get_alternative(Solver *solv, Id alternative, Id *idp, Id *fromp, Id *chosenp, Queue *choices, int *levelp);
 352
 353 extern void solver_calculate_multiversionmap(Pool *pool, Queue *job, Map *multiversionmap);
 354 extern void solver_calculate_noobsmap(Pool *pool, Queue *job, Map *multiversionmap);    /* obsolete */
 355 extern void solver_create_state_maps(Solver *solv, Map *installedmap, Map *conflictsmap);
 356
 357 extern void solver_calc_duchanges(Solver *solv, DUChanges *mps, int nmps);
 358 extern int solver_calc_installsizechange(Solver *solv);
 359
 360 extern void pool_job2solvables(Pool *pool, Queue *pkgs, Id how, Id what);
 361 extern int  pool_isemptyupdatejob(Pool *pool, Id how, Id what);
 362
 363 extern const char *solver_select2str(Pool *pool, Id select, Id what);
 364 extern const char *pool_job2str(Pool *pool, Id how, Id what, Id flagmask);
 365 extern const char *solver_alternative2str(Solver *solv, int type, Id id, Id from);
 366
 367
 368 /* iterate over all literals of a rule */
 369 #define FOR_RULELITERALS(l, pp, r)                              \
 370     for (pp = r->d < 0 ? -r->d - 1 : r->d,                      \
 371          l = r->p; l; l = (pp <= 0 ? (pp-- ? 0 : r->w2) :       \
 372          pool->whatprovidesdata[pp++]))
 373
 374
 375
 376
 377 /* XXX: this currently doesn't work correctly for SOLVER_SOLVABLE_REPO and
 378    SOLVER_SOLVABLE_ALL */
 379
 380 /* iterate over all packages selected by a job */
 381 #define FOR_JOB_SELECT(p, pp, select, what)                                     \
 382     if (select == SOLVER_SOLVABLE_REPO || select == SOLVER_SOLVABLE_ALL)        \
 383         p = pp = 0;                                                             \
 384     else for (pp = (select == SOLVER_SOLVABLE ? 0 :                             \
 385                select == SOLVER_SOLVABLE_ONE_OF ? what :                        \
 386                pool_whatprovides(pool, what)),                                  \
 387          p = (select == SOLVER_SOLVABLE ? what : pool->whatprovidesdata[pp++]); \
 388                                          p ; p = pool->whatprovidesdata[pp++])  \
 389       if (select == SOLVER_SOLVABLE_NAME &&                                     \
 390                         pool_match_nevr(pool, pool->solvables + p, what) == 0)  \
 391         continue;                                                               \
 392       else
 393
 394 /* weird suse stuff */
 395 extern void solver_trivial_installable(Solver *solv, Queue *pkgs, Queue *res);
 396
 397 #ifdef __cplusplus
 398 }
 399 #endif
 400
 401 #endif /* LIBSOLV_SOLVER_H */