fsck.h

   1 #ifndef GIT_FSCK_H
   2 #define GIT_FSCK_H
   3
   4 #include "oidset.h"
   5
   6 enum fsck_msg_type {
   7         /* for internal use only */
   8         FSCK_IGNORE,
   9         FSCK_INFO,
  10         FSCK_FATAL,
  11         /* "public", fed to e.g. error_func callbacks */
  12         FSCK_ERROR,
  13         FSCK_WARN,
  14 };
  15
  16 #define FOREACH_FSCK_MSG_ID(FUNC) \
  17         /* fatal errors */ \
  18         FUNC(NUL_IN_HEADER, FATAL) \
  19         FUNC(UNTERMINATED_HEADER, FATAL) \
  20         /* errors */ \
  21         FUNC(BAD_DATE, ERROR) \
  22         FUNC(BAD_DATE_OVERFLOW, ERROR) \
  23         FUNC(BAD_EMAIL, ERROR) \
  24         FUNC(BAD_NAME, ERROR) \
  25         FUNC(BAD_OBJECT_SHA1, ERROR) \
  26         FUNC(BAD_PARENT_SHA1, ERROR) \
  27         FUNC(BAD_TAG_OBJECT, ERROR) \
  28         FUNC(BAD_TIMEZONE, ERROR) \
  29         FUNC(BAD_TREE, ERROR) \
  30         FUNC(BAD_TREE_SHA1, ERROR) \
  31         FUNC(BAD_TYPE, ERROR) \
  32         FUNC(DUPLICATE_ENTRIES, ERROR) \
  33         FUNC(MISSING_AUTHOR, ERROR) \
  34         FUNC(MISSING_COMMITTER, ERROR) \
  35         FUNC(MISSING_EMAIL, ERROR) \
  36         FUNC(MISSING_NAME_BEFORE_EMAIL, ERROR) \
  37         FUNC(MISSING_OBJECT, ERROR) \
  38         FUNC(MISSING_SPACE_BEFORE_DATE, ERROR) \
  39         FUNC(MISSING_SPACE_BEFORE_EMAIL, ERROR) \
  40         FUNC(MISSING_TAG, ERROR) \
  41         FUNC(MISSING_TAG_ENTRY, ERROR) \
  42         FUNC(MISSING_TREE, ERROR) \
  43         FUNC(MISSING_TREE_OBJECT, ERROR) \
  44         FUNC(MISSING_TYPE, ERROR) \
  45         FUNC(MISSING_TYPE_ENTRY, ERROR) \
  46         FUNC(MULTIPLE_AUTHORS, ERROR) \
  47         FUNC(TREE_NOT_SORTED, ERROR) \
  48         FUNC(UNKNOWN_TYPE, ERROR) \
  49         FUNC(ZERO_PADDED_DATE, ERROR) \
  50         FUNC(GITMODULES_MISSING, ERROR) \
  51         FUNC(GITMODULES_BLOB, ERROR) \
  52         FUNC(GITMODULES_LARGE, ERROR) \
  53         FUNC(GITMODULES_NAME, ERROR) \
  54         FUNC(GITMODULES_SYMLINK, ERROR) \
  55         FUNC(GITMODULES_URL, ERROR) \
  56         FUNC(GITMODULES_PATH, ERROR) \
  57         FUNC(GITMODULES_UPDATE, ERROR) \
  58         FUNC(GITATTRIBUTES_MISSING, ERROR) \
  59         FUNC(GITATTRIBUTES_LARGE, ERROR) \
  60         FUNC(GITATTRIBUTES_LINE_LENGTH, ERROR) \
  61         FUNC(GITATTRIBUTES_BLOB, ERROR) \
  62         /* warnings */ \
  63         FUNC(BAD_FILEMODE, WARN) \
  64         FUNC(EMPTY_NAME, WARN) \
  65         FUNC(FULL_PATHNAME, WARN) \
  66         FUNC(HAS_DOT, WARN) \
  67         FUNC(HAS_DOTDOT, WARN) \
  68         FUNC(HAS_DOTGIT, WARN) \
  69         FUNC(NULL_SHA1, WARN) \
  70         FUNC(ZERO_PADDED_FILEMODE, WARN) \
  71         FUNC(NUL_IN_COMMIT, WARN) \
  72         /* infos (reported as warnings, but ignored by default) */ \
  73         FUNC(GITMODULES_PARSE, INFO) \
  74         FUNC(GITIGNORE_SYMLINK, INFO) \
  75         FUNC(GITATTRIBUTES_SYMLINK, INFO) \
  76         FUNC(MAILMAP_SYMLINK, INFO) \
  77         FUNC(BAD_TAG_NAME, INFO) \
  78         FUNC(MISSING_TAGGER_ENTRY, INFO) \
  79         /* ignored (elevated when requested) */ \
  80         FUNC(EXTRA_HEADER_ENTRY, IGNORE)
  81
  82 #define MSG_ID(id, msg_type) FSCK_MSG_##id,
  83 enum fsck_msg_id {
  84         FOREACH_FSCK_MSG_ID(MSG_ID)
  85         FSCK_MSG_MAX
  86 };
  87 #undef MSG_ID
  88
  89 struct fsck_options;
  90 struct object;
  91
  92 void fsck_set_msg_type_from_ids(struct fsck_options *options,
  93                                 enum fsck_msg_id msg_id,
  94                                 enum fsck_msg_type msg_type);
  95 void fsck_set_msg_type(struct fsck_options *options,
  96                        const char *msg_id, const char *msg_type);
  97 void fsck_set_msg_types(struct fsck_options *options, const char *values);
  98 int is_valid_msg_type(const char *msg_id, const char *msg_type);
  99
 100 /*
 101  * callback function for fsck_walk
 102  * type is the expected type of the object or OBJ_ANY
 103  * the return value is:
 104  *     0        everything OK
 105  *     <0       error signaled and abort
 106  *     >0       error signaled and do not abort
 107  */
 108 typedef int (*fsck_walk_func)(struct object *obj, enum object_type object_type,
 109                               void *data, struct fsck_options *options);
 110
 111 /* callback for fsck_object, type is FSCK_ERROR or FSCK_WARN */
 112 typedef int (*fsck_error)(struct fsck_options *o,
 113                           const struct object_id *oid, enum object_type object_type,
 114                           enum fsck_msg_type msg_type, enum fsck_msg_id msg_id,
 115                           const char *message);
 116
 117 int fsck_error_function(struct fsck_options *o,
 118                         const struct object_id *oid, enum object_type object_type,
 119                         enum fsck_msg_type msg_type, enum fsck_msg_id msg_id,
 120                         const char *message);
 121 int fsck_error_cb_print_missing_gitmodules(struct fsck_options *o,
 122                                            const struct object_id *oid,
 123                                            enum object_type object_type,
 124                                            enum fsck_msg_type msg_type,
 125                                            enum fsck_msg_id msg_id,
 126                                            const char *message);
 127
 128 struct fsck_options {
 129         fsck_walk_func walk;
 130         fsck_error error_func;
 131         unsigned strict:1;
 132         enum fsck_msg_type *msg_type;
 133         struct oidset skiplist;
 134         struct oidset gitmodules_found;
 135         struct oidset gitmodules_done;
 136         struct oidset gitattributes_found;
 137         struct oidset gitattributes_done;
 138         kh_oid_map_t *object_names;
 139 };
 140
 141 #define FSCK_OPTIONS_DEFAULT { \
 142         .skiplist = OIDSET_INIT, \
 143         .gitmodules_found = OIDSET_INIT, \
 144         .gitmodules_done = OIDSET_INIT, \
 145         .gitattributes_found = OIDSET_INIT, \
 146         .gitattributes_done = OIDSET_INIT, \
 147         .error_func = fsck_error_function \
 148 }
 149 #define FSCK_OPTIONS_STRICT { \
 150         .strict = 1, \
 151         .gitmodules_found = OIDSET_INIT, \
 152         .gitmodules_done = OIDSET_INIT, \
 153         .gitattributes_found = OIDSET_INIT, \
 154         .gitattributes_done = OIDSET_INIT, \
 155         .error_func = fsck_error_function, \
 156 }
 157 #define FSCK_OPTIONS_MISSING_GITMODULES { \
 158         .strict = 1, \
 159         .gitmodules_found = OIDSET_INIT, \
 160         .gitmodules_done = OIDSET_INIT, \
 161         .gitattributes_found = OIDSET_INIT, \
 162         .gitattributes_done = OIDSET_INIT, \
 163         .error_func = fsck_error_cb_print_missing_gitmodules, \
 164 }
 165
 166 /* descend in all linked child objects
 167  * the return value is:
 168  *    -1        error in processing the object
 169  *    <0        return value of the callback, which lead to an abort
 170  *    >0        return value of the first signaled error >0 (in the case of no other errors)
 171  *    0         everything OK
 172  */
 173 int fsck_walk(struct object *obj, void *data, struct fsck_options *options);
 174
 175 /*
 176  * Blob objects my pass a NULL data pointer, which indicates they are too large
 177  * to fit in memory. All other types must pass a real buffer.
 178  */
 179 int fsck_object(struct object *obj, void *data, unsigned long size,
 180         struct fsck_options *options);
 181
 182 /*
 183  * fsck a tag, and pass info about it back to the caller. This is
 184  * exposed fsck_object() internals for git-mktag(1).
 185  */
 186 int fsck_tag_standalone(const struct object_id *oid, const char *buffer,
 187                         unsigned long size, struct fsck_options *options,
 188                         struct object_id *tagged_oid,
 189                         int *tag_type);
 190
 191 /*
 192  * Some fsck checks are context-dependent, and may end up queued; run this
 193  * after completing all fsck_object() calls in order to resolve any remaining
 194  * checks.
 195  */
 196 int fsck_finish(struct fsck_options *options);
 197
 198 /*
 199  * Subsystem for storing human-readable names for each object.
 200  *
 201  * If fsck_enable_object_names() has not been called, all other functions are
 202  * noops.
 203  *
 204  * Use fsck_put_object_name() to seed initial names (e.g. from refnames); the
 205  * fsck code will extend that while walking trees, etc.
 206  *
 207  * Use fsck_get_object_name() to get a single name (or NULL if none). Or the
 208  * more convenient describe_object(), which always produces an output string
 209  * with the oid combined with the name (if any). Note that the return value
 210  * points to a rotating array of static buffers, and may be invalidated by a
 211  * subsequent call.
 212  */
 213 void fsck_enable_object_names(struct fsck_options *options);
 214 const char *fsck_get_object_name(struct fsck_options *options,
 215                                  const struct object_id *oid);
 216 __attribute__((format (printf,3,4)))
 217 void fsck_put_object_name(struct fsck_options *options,
 218                           const struct object_id *oid,
 219                           const char *fmt, ...);
 220 const char *fsck_describe_object(struct fsck_options *options,
 221                                  const struct object_id *oid);
 222
 223 /*
 224  * git_config() callback for use by fsck-y tools that want to support
 225  * fsck.<msg> fsck.skipList etc.
 226  */
 227 int git_fsck_config(const char *var, const char *value, void *cb);
 228
 229 #endif