2 * feature.c --- convert between features and strings
4 * Copyright (C) 1999 Theodore Ts'o <tytso@mit.edu>
7 * This file may be redistributed under the terms of the GNU Library
8 * General Public License, version 2.
20 #include <ext2fs/ext2fs.h>
21 #include <ext2fs/jfs_user.h>
29 static struct feature feature_list[] = {
30 { E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_DIR_PREALLOC,
32 { E2P_FEATURE_COMPAT, EXT3_FEATURE_COMPAT_HAS_JOURNAL,
34 { E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_IMAGIC_INODES,
36 { E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_EXT_ATTR,
38 { E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_DIR_INDEX,
40 { E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_RESIZE_INODE,
42 { E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_LAZY_BG,
44 { E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_EXCLUDE_BITMAP,
47 { E2P_FEATURE_RO_INCOMPAT, EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER,
49 { E2P_FEATURE_RO_INCOMPAT, EXT2_FEATURE_RO_COMPAT_LARGE_FILE,
51 { E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_HUGE_FILE,
53 { E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_GDT_CSUM,
55 { E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_GDT_CSUM,
57 { E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_DIR_NLINK,
59 { E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE,
61 { E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_QUOTA,
63 { E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_BIGALLOC,
65 { E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_METADATA_CSUM,
67 { E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_REPLICA,
70 { E2P_FEATURE_INCOMPAT, EXT2_FEATURE_INCOMPAT_COMPRESSION,
72 { E2P_FEATURE_INCOMPAT, EXT2_FEATURE_INCOMPAT_FILETYPE,
74 { E2P_FEATURE_INCOMPAT, EXT3_FEATURE_INCOMPAT_RECOVER,
76 { E2P_FEATURE_INCOMPAT, EXT3_FEATURE_INCOMPAT_JOURNAL_DEV,
78 { E2P_FEATURE_INCOMPAT, EXT3_FEATURE_INCOMPAT_EXTENTS,
80 { E2P_FEATURE_INCOMPAT, EXT3_FEATURE_INCOMPAT_EXTENTS,
82 { E2P_FEATURE_INCOMPAT, EXT2_FEATURE_INCOMPAT_META_BG,
84 { E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_64BIT,
86 { E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP,
88 { E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_FLEX_BG,
90 { E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_EA_INODE,
92 { E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_DIRDATA,
94 { E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_LARGEDIR,
96 { E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_INLINEDATA,
101 static struct feature jrnl_feature_list[] = {
102 { E2P_FEATURE_COMPAT, JFS_FEATURE_COMPAT_CHECKSUM,
103 "journal_checksum" },
105 { E2P_FEATURE_INCOMPAT, JFS_FEATURE_INCOMPAT_REVOKE,
106 "journal_incompat_revoke" },
107 { E2P_FEATURE_INCOMPAT, JFS_FEATURE_INCOMPAT_64BIT,
109 { E2P_FEATURE_INCOMPAT, JFS_FEATURE_INCOMPAT_ASYNC_COMMIT,
110 "journal_async_commit" },
111 { E2P_FEATURE_INCOMPAT, JFS_FEATURE_INCOMPAT_CSUM_V2,
112 "journal_checksum_v2" },
116 const char *e2p_feature2string(int compat, unsigned int mask)
123 for (f = feature_list; f->string; f++) {
124 if ((compat == f->compat) &&
129 case E2P_FEATURE_COMPAT:
132 case E2P_FEATURE_INCOMPAT:
135 case E2P_FEATURE_RO_INCOMPAT:
142 for (fnum = 0; mask >>= 1; fnum++);
143 sprintf(buf, "FEATURE_%c%d", fchar, fnum);
147 int e2p_string2feature(char *string, int *compat_type, unsigned int *mask)
153 for (f = feature_list; f->string; f++) {
154 if (!strcasecmp(string, f->string)) {
155 *compat_type = f->compat;
160 if (strncasecmp(string, "FEATURE_", 8))
166 *compat_type = E2P_FEATURE_COMPAT;
170 *compat_type = E2P_FEATURE_INCOMPAT;
174 *compat_type = E2P_FEATURE_RO_INCOMPAT;
181 num = strtol(string+9, &eptr, 10);
182 if (num > 32 || num < 0)
190 const char *e2p_jrnl_feature2string(int compat, unsigned int mask)
197 for (f = jrnl_feature_list; f->string; f++) {
198 if ((compat == f->compat) &&
203 case E2P_FEATURE_COMPAT:
206 case E2P_FEATURE_INCOMPAT:
209 case E2P_FEATURE_RO_INCOMPAT:
216 for (fnum = 0; mask >>= 1; fnum++);
217 sprintf(buf, "FEATURE_%c%d", fchar, fnum);
221 int e2p_jrnl_string2feature(char *string, int *compat_type, unsigned int *mask)
227 for (f = jrnl_feature_list; f->string; f++) {
228 if (!strcasecmp(string, f->string)) {
229 *compat_type = f->compat;
234 if (strncasecmp(string, "FEATURE_", 8))
240 *compat_type = E2P_FEATURE_COMPAT;
244 *compat_type = E2P_FEATURE_INCOMPAT;
248 *compat_type = E2P_FEATURE_RO_INCOMPAT;
255 num = strtol(string+9, &eptr, 10);
256 if (num > 32 || num < 0)
263 static char *skip_over_blanks(char *cp)
265 while (*cp && isspace(*cp))
270 static char *skip_over_word(char *cp)
272 while (*cp && !isspace(*cp) && *cp != ',')
278 * Edit a feature set array as requested by the user. The ok_array,
279 * if set, allows the application to limit what features the user is
280 * allowed to set or clear using this function. If clear_ok_array is set,
281 * then use it tell whether or not it is OK to clear a filesystem feature.
283 int e2p_edit_feature2(const char *str, __u32 *compat_array, __u32 *ok_array,
284 __u32 *clear_ok_array, int *type_err,
285 unsigned int *mask_err)
287 char *cp, *buf, *next;
294 clear_ok_array = ok_array;
301 buf = malloc(strlen(str)+1);
305 for (cp = buf; cp && *cp; cp = next ? next+1 : 0) {
307 cp = skip_over_blanks(cp);
308 next = skip_over_word(cp);
315 if ((strcasecmp(cp, "none") == 0) ||
316 (strcasecmp(cp, "clear") == 0)) {
332 if (e2p_string2feature(cp, &compat_type, &mask)) {
337 if (clear_ok_array &&
338 !(clear_ok_array[compat_type] & mask)) {
341 *type_err = (compat_type |
342 E2P_FEATURE_NEGATE_FLAG);
347 compat_array[compat_type] &= ~mask;
349 if (ok_array && !(ok_array[compat_type] & mask)) {
352 *type_err = compat_type;
357 compat_array[compat_type] |= mask;
364 int e2p_edit_feature(const char *str, __u32 *compat_array, __u32 *ok_array)
366 return e2p_edit_feature2(str, compat_array, ok_array, 0, 0, 0);
370 int main(int argc, char **argv)
372 int compat, compat2, i;
373 unsigned int mask, mask2;
377 for (i = 0; i < 2; i++) {
380 printf("Feature list:\n");
382 printf("\nJournal feature list:\n");
383 f = jrnl_feature_list;
385 for (; f->string; f++) {
387 e2p_string2feature((char *)f->string, &compat,
389 str = e2p_feature2string(compat, mask);
391 e2p_jrnl_string2feature((char *)f->string,
393 str = e2p_jrnl_feature2string(compat, mask);
396 printf("\tCompat = %d, Mask = %u, %s\n",
397 compat, mask, f->string);
398 if (strcmp(f->string, str)) {
399 if (e2p_string2feature((char *) str, &compat2,
401 (compat2 != compat) ||
403 fprintf(stderr, "Failure!\n");