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,
93 static struct feature jrnl_feature_list[] = {
94 { E2P_FEATURE_COMPAT, JFS_FEATURE_COMPAT_CHECKSUM,
97 { E2P_FEATURE_INCOMPAT, JFS_FEATURE_INCOMPAT_REVOKE,
98 "journal_incompat_revoke" },
99 { E2P_FEATURE_INCOMPAT, JFS_FEATURE_INCOMPAT_ASYNC_COMMIT,
100 "journal_async_commit" },
104 const char *e2p_feature2string(int compat, unsigned int mask)
111 for (f = feature_list; f->string; f++) {
112 if ((compat == f->compat) &&
117 case E2P_FEATURE_COMPAT:
120 case E2P_FEATURE_INCOMPAT:
123 case E2P_FEATURE_RO_INCOMPAT:
130 for (fnum = 0; mask >>= 1; fnum++);
131 sprintf(buf, "FEATURE_%c%d", fchar, fnum);
135 int e2p_string2feature(char *string, int *compat_type, unsigned int *mask)
141 for (f = feature_list; f->string; f++) {
142 if (!strcasecmp(string, f->string)) {
143 *compat_type = f->compat;
148 if (strncasecmp(string, "FEATURE_", 8))
154 *compat_type = E2P_FEATURE_COMPAT;
158 *compat_type = E2P_FEATURE_INCOMPAT;
162 *compat_type = E2P_FEATURE_RO_INCOMPAT;
169 num = strtol(string+9, &eptr, 10);
170 if (num > 32 || num < 0)
178 const char *e2p_jrnl_feature2string(int compat, unsigned int mask)
185 for (f = jrnl_feature_list; f->string; f++) {
186 if ((compat == f->compat) &&
191 case E2P_FEATURE_COMPAT:
194 case E2P_FEATURE_INCOMPAT:
197 case E2P_FEATURE_RO_INCOMPAT:
204 for (fnum = 0; mask >>= 1; fnum++);
205 sprintf(buf, "FEATURE_%c%d", fchar, fnum);
209 int e2p_jrnl_string2feature(char *string, int *compat_type, unsigned int *mask)
215 for (f = jrnl_feature_list; f->string; f++) {
216 if (!strcasecmp(string, f->string)) {
217 *compat_type = f->compat;
222 if (strncasecmp(string, "FEATURE_", 8))
228 *compat_type = E2P_FEATURE_COMPAT;
232 *compat_type = E2P_FEATURE_INCOMPAT;
236 *compat_type = E2P_FEATURE_RO_INCOMPAT;
243 num = strtol(string+9, &eptr, 10);
244 if (num > 32 || num < 0)
251 static char *skip_over_blanks(char *cp)
253 while (*cp && isspace(*cp))
258 static char *skip_over_word(char *cp)
260 while (*cp && !isspace(*cp) && *cp != ',')
266 * Edit a feature set array as requested by the user. The ok_array,
267 * if set, allows the application to limit what features the user is
268 * allowed to set or clear using this function. If clear_ok_array is set,
269 * then use it tell whether or not it is OK to clear a filesystem feature.
271 int e2p_edit_feature2(const char *str, __u32 *compat_array, __u32 *ok_array,
272 __u32 *clear_ok_array, int *type_err,
273 unsigned int *mask_err)
275 char *cp, *buf, *next;
282 clear_ok_array = ok_array;
289 buf = malloc(strlen(str)+1);
293 for (cp = buf; cp && *cp; cp = next ? next+1 : 0) {
295 cp = skip_over_blanks(cp);
296 next = skip_over_word(cp);
303 if ((strcasecmp(cp, "none") == 0) ||
304 (strcasecmp(cp, "clear") == 0)) {
320 if (e2p_string2feature(cp, &compat_type, &mask)) {
325 if (clear_ok_array &&
326 !(clear_ok_array[compat_type] & mask)) {
329 *type_err = (compat_type |
330 E2P_FEATURE_NEGATE_FLAG);
335 compat_array[compat_type] &= ~mask;
337 if (ok_array && !(ok_array[compat_type] & mask)) {
340 *type_err = compat_type;
345 compat_array[compat_type] |= mask;
352 int e2p_edit_feature(const char *str, __u32 *compat_array, __u32 *ok_array)
354 return e2p_edit_feature2(str, compat_array, ok_array, 0, 0, 0);
358 int main(int argc, char **argv)
360 int compat, compat2, i;
361 unsigned int mask, mask2;
365 for (i = 0; i < 2; i++) {
368 printf("Feature list:\n");
370 printf("\nJournal feature list:\n");
371 f = jrnl_feature_list;
373 for (; f->string; f++) {
375 e2p_string2feature((char *)f->string, &compat,
377 str = e2p_feature2string(compat, mask);
379 e2p_jrnl_string2feature((char *)f->string,
381 str = e2p_jrnl_feature2string(compat, mask);
384 printf("\tCompat = %d, Mask = %u, %s\n",
385 compat, mask, f->string);
386 if (strcmp(f->string, str)) {
387 if (e2p_string2feature((char *) str, &compat2,
389 (compat2 != compat) ||
391 fprintf(stderr, "Failure!\n");