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         /* warnings */ \
  59         FUNC(BAD_FILEMODE, WARN) \
  60         FUNC(EMPTY_NAME, WARN) \
  61         FUNC(FULL_PATHNAME, WARN) \
  62         FUNC(HAS_DOT, WARN) \
  63         FUNC(HAS_DOTDOT, WARN) \
  64         FUNC(HAS_DOTGIT, WARN) \
  65         FUNC(NULL_SHA1, WARN) \
  66         FUNC(ZERO_PADDED_FILEMODE, WARN) \
  67         FUNC(NUL_IN_COMMIT, WARN) \
  68         /* infos (reported as warnings, but ignored by default) */ \
  69         FUNC(GITMODULES_PARSE, INFO) \
  70         FUNC(BAD_TAG_NAME, INFO) \
  71         FUNC(MISSING_TAGGER_ENTRY, INFO) \
  72         /* ignored (elevated when requested) */ \
  73         FUNC(EXTRA_HEADER_ENTRY, IGNORE)
  74
  75 #define MSG_ID(id, msg_type) FSCK_MSG_##id,
  76 enum fsck_msg_id {
  77         FOREACH_FSCK_MSG_ID(MSG_ID)
  78         FSCK_MSG_MAX
  79 };
  80 #undef MSG_ID
  81
  82 struct fsck_options;
  83 struct object;
  84
  85 void fsck_set_msg_type_from_ids(struct fsck_options *options,
  86                                 enum fsck_msg_id msg_id,
  87                                 enum fsck_msg_type msg_type);
  88 void fsck_set_msg_type(struct fsck_options *options,
  89                        const char *msg_id, const char *msg_type);
  90 void fsck_set_msg_types(struct fsck_options *options, const char *values);
  91 int is_valid_msg_type(const char *msg_id, const char *msg_type);
  92
  93 /*
  94  * callback function for fsck_walk
  95  * type is the expected type of the object or OBJ_ANY
  96  * the return value is:
  97  *     0        everything OK
  98  *     <0       error signaled and abort
  99  *     >0       error signaled and do not abort
 100  */
 101 typedef int (*fsck_walk_func)(struct object *obj, enum object_type object_type,
 102                               void *data, struct fsck_options *options);
 103
 104 /* callback for fsck_object, type is FSCK_ERROR or FSCK_WARN */
 105 typedef int (*fsck_error)(struct fsck_options *o,
 106                           const struct object_id *oid, enum object_type object_type,
 107                           enum fsck_msg_type msg_type, enum fsck_msg_id msg_id,
 108                           const char *message);
 109
 110 int fsck_error_function(struct fsck_options *o,
 111                         const struct object_id *oid, enum object_type object_type,
 112                         enum fsck_msg_type msg_type, enum fsck_msg_id msg_id,
 113                         const char *message);
 114
 115 struct fsck_options {
 116         fsck_walk_func walk;
 117         fsck_error error_func;
 118         unsigned strict:1;
 119         enum fsck_msg_type *msg_type;
 120         struct oidset skiplist;
 121         kh_oid_map_t *object_names;
 122 };
 123
 124 #define FSCK_OPTIONS_DEFAULT { \
 125         .skiplist = OIDSET_INIT, \
 126         .error_func = fsck_error_function \
 127 }
 128 #define FSCK_OPTIONS_STRICT { \
 129         .strict = 1, \
 130         .error_func = fsck_error_function, \
 131 }
 132
 133 /* descend in all linked child objects
 134  * the return value is:
 135  *    -1        error in processing the object
 136  *    <0        return value of the callback, which lead to an abort
 137  *    >0        return value of the first signaled error >0 (in the case of no other errors)
 138  *    0         everything OK
 139  */
 140 int fsck_walk(struct object *obj, void *data, struct fsck_options *options);
 141
 142 /*
 143  * Blob objects my pass a NULL data pointer, which indicates they are too large
 144  * to fit in memory. All other types must pass a real buffer.
 145  */
 146 int fsck_object(struct object *obj, void *data, unsigned long size,
 147         struct fsck_options *options);
 148
 149 void register_found_gitmodules(const struct object_id *oid);
 150
 151 /*
 152  * fsck a tag, and pass info about it back to the caller. This is
 153  * exposed fsck_object() internals for git-mktag(1).
 154  */
 155 int fsck_tag_standalone(const struct object_id *oid, const char *buffer,
 156                         unsigned long size, struct fsck_options *options,
 157                         struct object_id *tagged_oid,
 158                         int *tag_type);
 159
 160 /*
 161  * Some fsck checks are context-dependent, and may end up queued; run this
 162  * after completing all fsck_object() calls in order to resolve any remaining
 163  * checks.
 164  */
 165 int fsck_finish(struct fsck_options *options);
 166
 167 /*
 168  * Subsystem for storing human-readable names for each object.
 169  *
 170  * If fsck_enable_object_names() has not been called, all other functions are
 171  * noops.
 172  *
 173  * Use fsck_put_object_name() to seed initial names (e.g. from refnames); the
 174  * fsck code will extend that while walking trees, etc.
 175  *
 176  * Use fsck_get_object_name() to get a single name (or NULL if none). Or the
 177  * more convenient describe_object(), which always produces an output string
 178  * with the oid combined with the name (if any). Note that the return value
 179  * points to a rotating array of static buffers, and may be invalidated by a
 180  * subsequent call.
 181  */
 182 void fsck_enable_object_names(struct fsck_options *options);
 183 const char *fsck_get_object_name(struct fsck_options *options,
 184                                  const struct object_id *oid);
 185 __attribute__((format (printf,3,4)))
 186 void fsck_put_object_name(struct fsck_options *options,
 187                           const struct object_id *oid,
 188                           const char *fmt, ...);
 189 const char *fsck_describe_object(struct fsck_options *options,
 190                                  const struct object_id *oid);
 191
 192 /*
 193  * git_config() callback for use by fsck-y tools that want to support
 194  * fsck.<msg> fsck.skipList etc.
 195  */
 196 int git_fsck_config(const char *var, const char *value, void *cb);
 197
 198 #endif