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,
46 { E2P_FEATURE_COMPAT, EXT4_FEATURE_COMPAT_SPARSE_SUPER2,
49 { E2P_FEATURE_RO_INCOMPAT, EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER,
51 { E2P_FEATURE_RO_INCOMPAT, EXT2_FEATURE_RO_COMPAT_LARGE_FILE,
53 { E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_HUGE_FILE,
55 { E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_GDT_CSUM,
57 { E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_GDT_CSUM,
59 { E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_DIR_NLINK,
61 { E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE,
63 { E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_QUOTA,
65 { E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_BIGALLOC,
67 { E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_METADATA_CSUM,
69 { E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_REPLICA,
72 { E2P_FEATURE_INCOMPAT, EXT2_FEATURE_INCOMPAT_COMPRESSION,
74 { E2P_FEATURE_INCOMPAT, EXT2_FEATURE_INCOMPAT_FILETYPE,
76 { E2P_FEATURE_INCOMPAT, EXT3_FEATURE_INCOMPAT_RECOVER,
78 { E2P_FEATURE_INCOMPAT, EXT3_FEATURE_INCOMPAT_JOURNAL_DEV,
80 { E2P_FEATURE_INCOMPAT, EXT3_FEATURE_INCOMPAT_EXTENTS,
82 { E2P_FEATURE_INCOMPAT, EXT3_FEATURE_INCOMPAT_EXTENTS,
84 { E2P_FEATURE_INCOMPAT, EXT2_FEATURE_INCOMPAT_META_BG,
86 { E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_64BIT,
88 { E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP,
90 { E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_FLEX_BG,
92 { E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_EA_INODE,
94 { E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_DIRDATA,
96 { E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_LARGEDIR,
98 { E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_INLINE_DATA,
100 { E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_ENCRYPT,
105 static struct feature jrnl_feature_list[] = {
106 { E2P_FEATURE_COMPAT, JFS_FEATURE_COMPAT_CHECKSUM,
107 "journal_checksum" },
109 { E2P_FEATURE_INCOMPAT, JFS_FEATURE_INCOMPAT_REVOKE,
110 "journal_incompat_revoke" },
111 { E2P_FEATURE_INCOMPAT, JFS_FEATURE_INCOMPAT_64BIT,
113 { E2P_FEATURE_INCOMPAT, JFS_FEATURE_INCOMPAT_ASYNC_COMMIT,
114 "journal_async_commit" },
115 { E2P_FEATURE_INCOMPAT, JFS_FEATURE_INCOMPAT_CSUM_V2,
116 "journal_checksum_v2" },
117 { E2P_FEATURE_INCOMPAT, JFS_FEATURE_INCOMPAT_CSUM_V3,
118 "journal_checksum_v3" },
122 const char *e2p_feature2string(int compat, unsigned int mask)
129 for (f = feature_list; f->string; f++) {
130 if ((compat == f->compat) &&
135 case E2P_FEATURE_COMPAT:
138 case E2P_FEATURE_INCOMPAT:
141 case E2P_FEATURE_RO_INCOMPAT:
148 for (fnum = 0; mask >>= 1; fnum++);
149 sprintf(buf, "FEATURE_%c%d", fchar, fnum);
153 int e2p_string2feature(char *string, int *compat_type, unsigned int *mask)
159 for (f = feature_list; f->string; f++) {
160 if (!strcasecmp(string, f->string)) {
161 *compat_type = f->compat;
166 if (strncasecmp(string, "FEATURE_", 8))
172 *compat_type = E2P_FEATURE_COMPAT;
176 *compat_type = E2P_FEATURE_INCOMPAT;
180 *compat_type = E2P_FEATURE_RO_INCOMPAT;
187 num = strtol(string+9, &eptr, 10);
188 if (num > 32 || num < 0)
196 const char *e2p_jrnl_feature2string(int compat, unsigned int mask)
203 for (f = jrnl_feature_list; f->string; f++) {
204 if ((compat == f->compat) &&
209 case E2P_FEATURE_COMPAT:
212 case E2P_FEATURE_INCOMPAT:
215 case E2P_FEATURE_RO_INCOMPAT:
222 for (fnum = 0; mask >>= 1; fnum++);
223 sprintf(buf, "FEATURE_%c%d", fchar, fnum);
227 int e2p_jrnl_string2feature(char *string, int *compat_type, unsigned int *mask)
233 for (f = jrnl_feature_list; f->string; f++) {
234 if (!strcasecmp(string, f->string)) {
235 *compat_type = f->compat;
240 if (strncasecmp(string, "FEATURE_", 8))
246 *compat_type = E2P_FEATURE_COMPAT;
250 *compat_type = E2P_FEATURE_INCOMPAT;
254 *compat_type = E2P_FEATURE_RO_INCOMPAT;
261 num = strtol(string+9, &eptr, 10);
262 if (num > 32 || num < 0)
269 static char *skip_over_blanks(char *cp)
271 while (*cp && isspace(*cp))
276 static char *skip_over_word(char *cp)
278 while (*cp && !isspace(*cp) && *cp != ',')
284 * Edit a feature set array as requested by the user. The ok_array,
285 * if set, allows the application to limit what features the user is
286 * allowed to set or clear using this function. If clear_ok_array is set,
287 * then use it tell whether or not it is OK to clear a filesystem feature.
289 int e2p_edit_feature2(const char *str, __u32 *compat_array, __u32 *ok_array,
290 __u32 *clear_ok_array, int *type_err,
291 unsigned int *mask_err)
293 char *cp, *buf, *next;
300 clear_ok_array = ok_array;
307 buf = malloc(strlen(str)+1);
311 for (cp = buf; cp && *cp; cp = next ? next+1 : 0) {
313 cp = skip_over_blanks(cp);
314 next = skip_over_word(cp);
321 if ((strcasecmp(cp, "none") == 0) ||
322 (strcasecmp(cp, "clear") == 0)) {
338 if (e2p_string2feature(cp, &compat_type, &mask)) {
343 if (clear_ok_array &&
344 !(clear_ok_array[compat_type] & mask)) {
347 *type_err = (compat_type |
348 E2P_FEATURE_NEGATE_FLAG);
353 compat_array[compat_type] &= ~mask;
355 if (ok_array && !(ok_array[compat_type] & mask)) {
358 *type_err = compat_type;
363 compat_array[compat_type] |= mask;
370 int e2p_edit_feature(const char *str, __u32 *compat_array, __u32 *ok_array)
372 return e2p_edit_feature2(str, compat_array, ok_array, 0, 0, 0);
376 int main(int argc, char **argv)
378 int compat, compat2, i;
379 unsigned int mask, mask2;
383 for (i = 0; i < 2; i++) {
386 printf("Feature list:\n");
388 printf("\nJournal feature list:\n");
389 f = jrnl_feature_list;
391 for (; f->string; f++) {
393 e2p_string2feature((char *)f->string, &compat,
395 str = e2p_feature2string(compat, mask);
397 e2p_jrnl_string2feature((char *)f->string,
399 str = e2p_jrnl_feature2string(compat, mask);
402 printf("\tCompat = %d, Mask = %u, %s\n",
403 compat, mask, f->string);
404 if (strcmp(f->string, str)) {
405 if (e2p_string2feature((char *) str, &compat2,
407 (compat2 != compat) ||
409 fprintf(stderr, "Failure!\n");