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/kernel-jbd.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
,
71 { E2P_FEATURE_RO_INCOMPAT
, EXT4_FEATURE_RO_COMPAT_READONLY
,
73 { E2P_FEATURE_RO_INCOMPAT
, EXT4_FEATURE_RO_COMPAT_PROJECT
,
75 { E2P_FEATURE_RO_INCOMPAT
, EXT4_FEATURE_RO_COMPAT_SHARED_BLOCKS
,
77 { E2P_FEATURE_RO_INCOMPAT
, EXT4_FEATURE_RO_COMPAT_VERITY
,
80 { E2P_FEATURE_INCOMPAT
, EXT2_FEATURE_INCOMPAT_COMPRESSION
,
82 { E2P_FEATURE_INCOMPAT
, EXT2_FEATURE_INCOMPAT_FILETYPE
,
84 { E2P_FEATURE_INCOMPAT
, EXT3_FEATURE_INCOMPAT_RECOVER
,
86 { E2P_FEATURE_INCOMPAT
, EXT3_FEATURE_INCOMPAT_JOURNAL_DEV
,
88 { E2P_FEATURE_INCOMPAT
, EXT3_FEATURE_INCOMPAT_EXTENTS
,
90 { E2P_FEATURE_INCOMPAT
, EXT3_FEATURE_INCOMPAT_EXTENTS
,
92 { E2P_FEATURE_INCOMPAT
, EXT2_FEATURE_INCOMPAT_META_BG
,
94 { E2P_FEATURE_INCOMPAT
, EXT4_FEATURE_INCOMPAT_64BIT
,
96 { E2P_FEATURE_INCOMPAT
, EXT4_FEATURE_INCOMPAT_MMP
,
98 { E2P_FEATURE_INCOMPAT
, EXT4_FEATURE_INCOMPAT_FLEX_BG
,
100 { E2P_FEATURE_INCOMPAT
, EXT4_FEATURE_INCOMPAT_EA_INODE
,
102 { E2P_FEATURE_INCOMPAT
, EXT4_FEATURE_INCOMPAT_DIRDATA
,
104 { E2P_FEATURE_INCOMPAT
, EXT4_FEATURE_INCOMPAT_CSUM_SEED
,
105 "metadata_csum_seed"},
106 { E2P_FEATURE_INCOMPAT
, EXT4_FEATURE_INCOMPAT_LARGEDIR
,
108 { E2P_FEATURE_INCOMPAT
, EXT4_FEATURE_INCOMPAT_INLINE_DATA
,
110 { E2P_FEATURE_INCOMPAT
, EXT4_FEATURE_INCOMPAT_ENCRYPT
,
112 { E2P_FEATURE_INCOMPAT
, EXT4_FEATURE_INCOMPAT_FNAME_ENCODING
,
117 static struct feature jrnl_feature_list
[] = {
118 { E2P_FEATURE_COMPAT
, JFS_FEATURE_COMPAT_CHECKSUM
,
119 "journal_checksum" },
121 { E2P_FEATURE_INCOMPAT
, JFS_FEATURE_INCOMPAT_REVOKE
,
122 "journal_incompat_revoke" },
123 { E2P_FEATURE_INCOMPAT
, JFS_FEATURE_INCOMPAT_64BIT
,
125 { E2P_FEATURE_INCOMPAT
, JFS_FEATURE_INCOMPAT_ASYNC_COMMIT
,
126 "journal_async_commit" },
127 { E2P_FEATURE_INCOMPAT
, JFS_FEATURE_INCOMPAT_CSUM_V2
,
128 "journal_checksum_v2" },
129 { E2P_FEATURE_INCOMPAT
, JFS_FEATURE_INCOMPAT_CSUM_V3
,
130 "journal_checksum_v3" },
134 const char *e2p_feature2string(int compat
, unsigned int mask
)
141 for (f
= feature_list
; f
->string
; f
++) {
142 if ((compat
== f
->compat
) &&
147 case E2P_FEATURE_COMPAT
:
150 case E2P_FEATURE_INCOMPAT
:
153 case E2P_FEATURE_RO_INCOMPAT
:
160 for (fnum
= 0; mask
>>= 1; fnum
++);
161 sprintf(buf
, "FEATURE_%c%d", fchar
, fnum
);
165 int e2p_string2feature(char *string
, int *compat_type
, unsigned int *mask
)
171 for (f
= feature_list
; f
->string
; f
++) {
172 if (!strcasecmp(string
, f
->string
)) {
173 *compat_type
= f
->compat
;
178 if (strncasecmp(string
, "FEATURE_", 8))
184 *compat_type
= E2P_FEATURE_COMPAT
;
188 *compat_type
= E2P_FEATURE_INCOMPAT
;
192 *compat_type
= E2P_FEATURE_RO_INCOMPAT
;
199 num
= strtol(string
+9, &eptr
, 10);
200 if (num
> 31 || num
< 0)
208 const char *e2p_jrnl_feature2string(int compat
, unsigned int mask
)
215 for (f
= jrnl_feature_list
; f
->string
; f
++) {
216 if ((compat
== f
->compat
) &&
221 case E2P_FEATURE_COMPAT
:
224 case E2P_FEATURE_INCOMPAT
:
227 case E2P_FEATURE_RO_INCOMPAT
:
234 for (fnum
= 0; mask
>>= 1; fnum
++);
235 sprintf(buf
, "FEATURE_%c%d", fchar
, fnum
);
239 int e2p_jrnl_string2feature(char *string
, int *compat_type
, unsigned int *mask
)
245 for (f
= jrnl_feature_list
; f
->string
; f
++) {
246 if (!strcasecmp(string
, f
->string
)) {
247 *compat_type
= f
->compat
;
252 if (strncasecmp(string
, "FEATURE_", 8))
258 *compat_type
= E2P_FEATURE_COMPAT
;
262 *compat_type
= E2P_FEATURE_INCOMPAT
;
266 *compat_type
= E2P_FEATURE_RO_INCOMPAT
;
273 num
= strtol(string
+9, &eptr
, 10);
274 if (num
> 31 || num
< 0)
281 static char *skip_over_blanks(char *cp
)
283 while (*cp
&& isspace(*cp
))
288 static char *skip_over_word(char *cp
)
290 while (*cp
&& !isspace(*cp
) && *cp
!= ',')
296 * Edit a feature set array as requested by the user. The ok_array,
297 * if set, allows the application to limit what features the user is
298 * allowed to set or clear using this function. If clear_ok_array is set,
299 * then use it tell whether or not it is OK to clear a filesystem feature.
301 int e2p_edit_feature2(const char *str
, __u32
*compat_array
, __u32
*ok_array
,
302 __u32
*clear_ok_array
, int *type_err
,
303 unsigned int *mask_err
)
305 char *cp
, *buf
, *next
;
312 clear_ok_array
= ok_array
;
319 buf
= malloc(strlen(str
)+1);
323 for (cp
= buf
; cp
&& *cp
; cp
= next
? next
+1 : 0) {
325 cp
= skip_over_blanks(cp
);
326 next
= skip_over_word(cp
);
333 if ((strcasecmp(cp
, "none") == 0) ||
334 (strcasecmp(cp
, "clear") == 0)) {
350 if (e2p_string2feature(cp
, &compat_type
, &mask
)) {
355 if (clear_ok_array
&&
356 !(clear_ok_array
[compat_type
] & mask
)) {
359 *type_err
= (compat_type
|
360 E2P_FEATURE_NEGATE_FLAG
);
365 compat_array
[compat_type
] &= ~mask
;
367 if (ok_array
&& !(ok_array
[compat_type
] & mask
)) {
370 *type_err
= compat_type
;
375 compat_array
[compat_type
] |= mask
;
382 int e2p_edit_feature(const char *str
, __u32
*compat_array
, __u32
*ok_array
)
384 return e2p_edit_feature2(str
, compat_array
, ok_array
, 0, 0, 0);
388 int main(int argc
, char **argv
)
390 int compat
, compat2
, i
;
391 unsigned int mask
, mask2
;
395 for (i
= 0; i
< 2; i
++) {
398 printf("Feature list:\n");
400 printf("\nJournal feature list:\n");
401 f
= jrnl_feature_list
;
403 for (; f
->string
; f
++) {
405 e2p_string2feature((char *)f
->string
, &compat
,
407 str
= e2p_feature2string(compat
, mask
);
409 e2p_jrnl_string2feature((char *)f
->string
,
411 str
= e2p_jrnl_feature2string(compat
, mask
);
414 printf("\tCompat = %d, Mask = %u, %s\n",
415 compat
, mask
, f
->string
);
416 if (strcmp(f
->string
, str
)) {
417 if (e2p_string2feature((char *) str
, &compat2
,
419 (compat2
!= compat
) ||
421 fprintf(stderr
, "Failure!\n");