[thirdparty/e2fsprogs.git] / lib / e2p / feature.c

/*
 * feature.c --- convert between features and strings
 *
 * Copyright (C) 1999  Theodore Ts'o <tytso@mit.edu>
 *
 * %Begin-Header%
 * This file may be redistributed under the terms of the GNU Library
 * General Public License, version 2.
 * %End-Header%
 */

#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>

#include "e2p.h"
#include <ext2fs/ext2fs.h>
#include <ext2fs/kernel-jbd.h>

struct feature {
	int		compat;
	unsigned int	mask;
	const char	*string;
};

static struct feature feature_list[] = {
	{	E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_DIR_PREALLOC,
			"dir_prealloc" },
	{	E2P_FEATURE_COMPAT, EXT3_FEATURE_COMPAT_HAS_JOURNAL,
			"has_journal" },
	{	E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_IMAGIC_INODES,
			"imagic_inodes" },
	{	E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_EXT_ATTR,
			"ext_attr" },
	{	E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_DIR_INDEX,
			"dir_index" },
	{	E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_RESIZE_INODE,
			"resize_inode" },
	{	E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_LAZY_BG,
			"lazy_bg" },
	{	E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_EXCLUDE_BITMAP,
			"snapshot_bitmap" },
	{	E2P_FEATURE_COMPAT, EXT4_FEATURE_COMPAT_SPARSE_SUPER2,
			"sparse_super2" },

	{	E2P_FEATURE_RO_INCOMPAT, EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER,
			"sparse_super" },
	{	E2P_FEATURE_RO_INCOMPAT, EXT2_FEATURE_RO_COMPAT_LARGE_FILE,
			"large_file" },
	{	E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_HUGE_FILE,
			"huge_file" },
	{	E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_GDT_CSUM,
			"uninit_bg" },
	{	E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_GDT_CSUM,
			"uninit_groups" },
	{	E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_DIR_NLINK,
			"dir_nlink" },
	{	E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE,
			"extra_isize" },
	{	E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_QUOTA,
			"quota" },
	{	E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_BIGALLOC,
			"bigalloc"},
	{	E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_METADATA_CSUM,
			"metadata_csum"},
	{	E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_REPLICA,
			"replica" },
	{	E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_READONLY,
			"read-only" },
	{	E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_PROJECT,
			"project"},
	{	E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_SHARED_BLOCKS,
			"shared_blocks"},

	{	E2P_FEATURE_INCOMPAT, EXT2_FEATURE_INCOMPAT_COMPRESSION,
			"compression" },
	{	E2P_FEATURE_INCOMPAT, EXT2_FEATURE_INCOMPAT_FILETYPE,
			"filetype" },
	{	E2P_FEATURE_INCOMPAT, EXT3_FEATURE_INCOMPAT_RECOVER,
			"needs_recovery" },
	{	E2P_FEATURE_INCOMPAT, EXT3_FEATURE_INCOMPAT_JOURNAL_DEV,
			"journal_dev" },
	{	E2P_FEATURE_INCOMPAT, EXT3_FEATURE_INCOMPAT_EXTENTS,
			"extent" },
	{	E2P_FEATURE_INCOMPAT, EXT3_FEATURE_INCOMPAT_EXTENTS,
			"extents" },
	{	E2P_FEATURE_INCOMPAT, EXT2_FEATURE_INCOMPAT_META_BG,
			"meta_bg" },
	{	E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_64BIT,
			"64bit" },
	{       E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP,
			"mmp" },
	{       E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_FLEX_BG,
			"flex_bg"},
	{       E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_EA_INODE,
			"ea_inode"},
	{       E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_DIRDATA,
			"dirdata"},
	{       E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_CSUM_SEED,
			"metadata_csum_seed"},
	{       E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_LARGEDIR,
			"large_dir"},
	{       E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_INLINE_DATA,
			"inline_data"},
	{       E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_ENCRYPT,
			"encrypt"},
	{	0, 0, 0 },
};

static struct feature jrnl_feature_list[] = {
       {       E2P_FEATURE_COMPAT, JFS_FEATURE_COMPAT_CHECKSUM,
                       "journal_checksum" },

       {       E2P_FEATURE_INCOMPAT, JFS_FEATURE_INCOMPAT_REVOKE,
                       "journal_incompat_revoke" },
       {       E2P_FEATURE_INCOMPAT, JFS_FEATURE_INCOMPAT_64BIT,
                       "journal_64bit" },
       {       E2P_FEATURE_INCOMPAT, JFS_FEATURE_INCOMPAT_ASYNC_COMMIT,
                       "journal_async_commit" },
       {       E2P_FEATURE_INCOMPAT, JFS_FEATURE_INCOMPAT_CSUM_V2,
                       "journal_checksum_v2" },
       {       E2P_FEATURE_INCOMPAT, JFS_FEATURE_INCOMPAT_CSUM_V3,
                       "journal_checksum_v3" },
       {       0, 0, 0 },
};

const char *e2p_feature2string(int compat, unsigned int mask)
{
	struct feature  *f;
	static char buf[20];
	char	fchar;
	int	fnum;

	for (f = feature_list; f->string; f++) {
		if ((compat == f->compat) &&
		    (mask == f->mask))
			return f->string;
	}
	switch (compat) {
	case  E2P_FEATURE_COMPAT:
		fchar = 'C';
		break;
	case E2P_FEATURE_INCOMPAT:
		fchar = 'I';
		break;
	case E2P_FEATURE_RO_INCOMPAT:
		fchar = 'R';
		break;
	default:
		fchar = '?';
		break;
	}
	for (fnum = 0; mask >>= 1; fnum++);
	sprintf(buf, "FEATURE_%c%d", fchar, fnum);
	return buf;
}

int e2p_string2feature(char *string, int *compat_type, unsigned int *mask)
{
	struct feature  *f;
	char		*eptr;
	int		num;

	for (f = feature_list; f->string; f++) {
		if (!strcasecmp(string, f->string)) {
			*compat_type = f->compat;
			*mask = f->mask;
			return 0;
		}
	}
	if (strncasecmp(string, "FEATURE_", 8))
		return 1;

	switch (string[8]) {
	case 'c':
	case 'C':
		*compat_type = E2P_FEATURE_COMPAT;
		break;
	case 'i':
	case 'I':
		*compat_type = E2P_FEATURE_INCOMPAT;
		break;
	case 'r':
	case 'R':
		*compat_type = E2P_FEATURE_RO_INCOMPAT;
		break;
	default:
		return 1;
	}
	if (string[9] == 0)
		return 1;
	num = strtol(string+9, &eptr, 10);
	if (num > 31 || num < 0)
		return 1;
	if (*eptr)
		return 1;
	*mask = 1 << num;
	return 0;
}

const char *e2p_jrnl_feature2string(int compat, unsigned int mask)
{
	struct feature  *f;
	static char buf[20];
	char	fchar;
	int	fnum;

	for (f = jrnl_feature_list; f->string; f++) {
		if ((compat == f->compat) &&
		    (mask == f->mask))
			return f->string;
	}
	switch (compat) {
	case  E2P_FEATURE_COMPAT:
		fchar = 'C';
		break;
	case E2P_FEATURE_INCOMPAT:
		fchar = 'I';
		break;
	case E2P_FEATURE_RO_INCOMPAT:
		fchar = 'R';
		break;
	default:
		fchar = '?';
		break;
	}
	for (fnum = 0; mask >>= 1; fnum++);
	sprintf(buf, "FEATURE_%c%d", fchar, fnum);
	return buf;
}

int e2p_jrnl_string2feature(char *string, int *compat_type, unsigned int *mask)
{
	struct feature  *f;
	char		*eptr;
	int		num;

	for (f = jrnl_feature_list; f->string; f++) {
		if (!strcasecmp(string, f->string)) {
			*compat_type = f->compat;
			*mask = f->mask;
			return 0;
		}
	}
	if (strncasecmp(string, "FEATURE_", 8))
		return 1;

	switch (string[8]) {
	case 'c':
	case 'C':
		*compat_type = E2P_FEATURE_COMPAT;
		break;
	case 'i':
	case 'I':
		*compat_type = E2P_FEATURE_INCOMPAT;
		break;
	case 'r':
	case 'R':
		*compat_type = E2P_FEATURE_RO_INCOMPAT;
		break;
	default:
		return 1;
	}
	if (string[9] == 0)
		return 1;
	num = strtol(string+9, &eptr, 10);
	if (num > 31 || num < 0)
		return 1;
	if (*eptr)
		return 1;
	*mask = 1 << num;
	return 0;
}
static char *skip_over_blanks(char *cp)
{
	while (*cp && isspace(*cp))
		cp++;
	return cp;
}

static char *skip_over_word(char *cp)
{
	while (*cp && !isspace(*cp) && *cp != ',')
		cp++;
	return cp;
}

/*
 * Edit a feature set array as requested by the user.  The ok_array,
 * if set, allows the application to limit what features the user is
 * allowed to set or clear using this function.  If clear_ok_array is set,
 * then use it tell whether or not it is OK to clear a filesystem feature.
 */
int e2p_edit_feature2(const char *str, __u32 *compat_array, __u32 *ok_array,
		      __u32 *clear_ok_array, int *type_err,
		      unsigned int *mask_err)
{
	char		*cp, *buf, *next;
	int		neg;
	unsigned int	mask;
	int		compat_type;
	int		rc = 0;

	if (!clear_ok_array)
		clear_ok_array = ok_array;

	if (type_err)
		*type_err = 0;
	if (mask_err)
		*mask_err = 0;

	buf = malloc(strlen(str)+1);
	if (!buf)
		return 1;
	strcpy(buf, str);
	for (cp = buf; cp && *cp; cp = next ? next+1 : 0) {
		neg = 0;
		cp = skip_over_blanks(cp);
		next = skip_over_word(cp);

		if (*next == 0)
			next = 0;
		else
			*next = 0;

		if ((strcasecmp(cp, "none") == 0) ||
		    (strcasecmp(cp, "clear") == 0)) {
			compat_array[0] = 0;
			compat_array[1] = 0;
			compat_array[2] = 0;
			continue;
		}

		switch (*cp) {
		case '-':
		case '^':
			neg++;
			/* fallthrough */
		case '+':
			cp++;
			break;
		}
		if (e2p_string2feature(cp, &compat_type, &mask)) {
			rc = 1;
			break;
		}
		if (neg) {
			if (clear_ok_array &&
			    !(clear_ok_array[compat_type] & mask)) {
				rc = 1;
				if (type_err)
					*type_err = (compat_type |
						     E2P_FEATURE_NEGATE_FLAG);
				if (mask_err)
					*mask_err = mask;
				break;
			}
			compat_array[compat_type] &= ~mask;
		} else {
			if (ok_array && !(ok_array[compat_type] & mask)) {
				rc = 1;
				if (type_err)
					*type_err = compat_type;
				if (mask_err)
					*mask_err = mask;
				break;
			}
			compat_array[compat_type] |= mask;
		}
	}
	free(buf);
	return rc;
}

int e2p_edit_feature(const char *str, __u32 *compat_array, __u32 *ok_array)
{
	return e2p_edit_feature2(str, compat_array, ok_array, 0, 0, 0);
}

#ifdef TEST_PROGRAM
int main(int argc, char **argv)
{
	int compat, compat2, i;
	unsigned int mask, mask2;
	const char *str;
	struct feature *f;

	for (i = 0; i < 2; i++) {
		if (i == 0) {
			f = feature_list;
			printf("Feature list:\n");
		} else {
			printf("\nJournal feature list:\n");
			f = jrnl_feature_list;
		}
		for (; f->string; f++) {
			if (i == 0) {
				e2p_string2feature((char *)f->string, &compat,
						   &mask);
				str = e2p_feature2string(compat, mask);
			} else {
				e2p_jrnl_string2feature((char *)f->string,
							&compat, &mask);
				str = e2p_jrnl_feature2string(compat, mask);
			}

			printf("\tCompat = %d, Mask = %u, %s\n",
			       compat, mask, f->string);
			if (strcmp(f->string, str)) {
				if (e2p_string2feature((char *) str, &compat2,
						       &mask2) ||
				    (compat2 != compat) ||
				    (mask2 != mask)) {
					fprintf(stderr, "Failure!\n");
					exit(1);
				}
			}
		}
	}
	exit(0);
}
#endif
Commit	Line	Data
d7b701de TT	1	/*
d7b701de TT	2	* feature.c --- convert between features and strings
efc6f628	3	*
d7b701de	4	* Copyright (C) 1999 Theodore Ts'o <tytso@mit.edu>
efc6f628	5	*
543547a5 TT	6	* %Begin-Header%
	7	* This file may be redistributed under the terms of the GNU Library
	8	* General Public License, version 2.
	9	* %End-Header%
d7b701de TT	10	*/
d7b701de TT	11
d1154eb4	12	#include "config.h"
d7b701de TT	13	#include <stdio.h>
	14	#include <stdlib.h>
	15	#include <string.h>
36caf25f	16	#include <ctype.h>
d7b701de TT	17	#include <errno.h>
	18
	19	#include "e2p.h"
03efde8a	20	#include <ext2fs/ext2fs.h>
81f95d43	21	#include <ext2fs/kernel-jbd.h>
d7b701de	22
d7b701de TT	23	struct feature {
	24	int compat;
	25	unsigned int mask;
36caf25f	26	const char *string;
d7b701de TT	27	};
d7b701de TT	28
e2207ce5	29	static struct feature feature_list[] = {
d7b701de TT	30	{ E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_DIR_PREALLOC,
	31	"dir_prealloc" },
	32	{ E2P_FEATURE_COMPAT, EXT3_FEATURE_COMPAT_HAS_JOURNAL,
	33	"has_journal" },
	34	{ E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_IMAGIC_INODES,
	35	"imagic_inodes" },
342d847d TT	36	{ E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_EXT_ATTR,
342d847d TT	37	"ext_attr" },
49d5ddcc TT	38	{ E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_DIR_INDEX,
	39	"dir_index" },
	40	{ E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_RESIZE_INODE,
	41	"resize_inode" },
f5fa2007 TT	42	{ E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_LAZY_BG,
f5fa2007 TT	43	"lazy_bg" },
89efc88e	44	{ E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_EXCLUDE_BITMAP,
16c581d0	45	"snapshot_bitmap" },
65c6c3e0 TT	46	{ E2P_FEATURE_COMPAT, EXT4_FEATURE_COMPAT_SPARSE_SUPER2,
65c6c3e0 TT	47	"sparse_super2" },
477007e1	48
d7b701de TT	49	{ E2P_FEATURE_RO_INCOMPAT, EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER,
	50	"sparse_super" },
	51	{ E2P_FEATURE_RO_INCOMPAT, EXT2_FEATURE_RO_COMPAT_LARGE_FILE,
	52	"large_file" },
477007e1 TT	53	{ E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_HUGE_FILE,
477007e1 TT	54	"huge_file" },
2930dad2 TT	55	{ E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_GDT_CSUM,
2930dad2 TT	56	"uninit_bg" },
477007e1	57	{ E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_GDT_CSUM,
3542ba0d	58	"uninit_groups" },
477007e1 TT	59	{ E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_DIR_NLINK,
	60	"dir_nlink" },
	61	{ E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE,
	62	"extra_isize" },
0edcc270 AK	63	{ E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_QUOTA,
0edcc270 AK	64	"quota" },
412376ef TT	65	{ E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_BIGALLOC,
412376ef TT	66	"bigalloc"},
89efc88e TT	67	{ E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_METADATA_CSUM,
89efc88e TT	68	"metadata_csum"},
991211f6 TT	69	{ E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_REPLICA,
991211f6 TT	70	"replica" },
8b39e4cf TT	71	{ E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_READONLY,
8b39e4cf TT	72	"read-only" },
0c18d036 LX	73	{ E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_PROJECT,
0c18d036 LX	74	"project"},
611d3413 JQ	75	{ E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_SHARED_BLOCKS,
611d3413 JQ	76	"shared_blocks"},
477007e1	77
d7b701de TT	78	{ E2P_FEATURE_INCOMPAT, EXT2_FEATURE_INCOMPAT_COMPRESSION,
	79	"compression" },
	80	{ E2P_FEATURE_INCOMPAT, EXT2_FEATURE_INCOMPAT_FILETYPE,
	81	"filetype" },
	82	{ E2P_FEATURE_INCOMPAT, EXT3_FEATURE_INCOMPAT_RECOVER,
	83	"needs_recovery" },
c2204b32 TT	84	{ E2P_FEATURE_INCOMPAT, EXT3_FEATURE_INCOMPAT_JOURNAL_DEV,
c2204b32 TT	85	"journal_dev" },
ba1e1254 TT	86	{ E2P_FEATURE_INCOMPAT, EXT3_FEATURE_INCOMPAT_EXTENTS,
ba1e1254 TT	87	"extent" },
39dc1c45 TT	88	{ E2P_FEATURE_INCOMPAT, EXT3_FEATURE_INCOMPAT_EXTENTS,
39dc1c45 TT	89	"extents" },
c046ac7f TT	90	{ E2P_FEATURE_INCOMPAT, EXT2_FEATURE_INCOMPAT_META_BG,
c046ac7f TT	91	"meta_bg" },
477007e1 TT	92	{ E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_64BIT,
477007e1 TT	93	"64bit" },
0f5eba75 AD	94	{ E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP,
0f5eba75 AD	95	"mmp" },
c2d4300b	96	{ E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_FLEX_BG,
0f5eba75	97	"flex_bg"},
660b4c3b TT	98	{ E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_EA_INODE,
	99	"ea_inode"},
	100	{ E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_DIRDATA,
	101	"dirdata"},
2ed0adbc DW	102	{ E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_CSUM_SEED,
2ed0adbc DW	103	"metadata_csum_seed"},
660b4c3b TT	104	{ E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_LARGEDIR,
660b4c3b TT	105	"large_dir"},
94846158	106	{ E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_INLINE_DATA,
660b4c3b	107	"inline_data"},
22f22ab1 TT	108	{ E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_ENCRYPT,
22f22ab1 TT	109	"encrypt"},
d7b701de TT	110	{ 0, 0, 0 },
	111	};
	112
03efde8a AD	113	static struct feature jrnl_feature_list[] = {
	114	{ E2P_FEATURE_COMPAT, JFS_FEATURE_COMPAT_CHECKSUM,
	115	"journal_checksum" },
	116
	117	{ E2P_FEATURE_INCOMPAT, JFS_FEATURE_INCOMPAT_REVOKE,
	118	"journal_incompat_revoke" },
8c778b3a TT	119	{ E2P_FEATURE_INCOMPAT, JFS_FEATURE_INCOMPAT_64BIT,
8c778b3a TT	120	"journal_64bit" },
03efde8a AD	121	{ E2P_FEATURE_INCOMPAT, JFS_FEATURE_INCOMPAT_ASYNC_COMMIT,
03efde8a AD	122	"journal_async_commit" },
382fad03 DW	123	{ E2P_FEATURE_INCOMPAT, JFS_FEATURE_INCOMPAT_CSUM_V2,
382fad03 DW	124	"journal_checksum_v2" },
38d5adf3 DW	125	{ E2P_FEATURE_INCOMPAT, JFS_FEATURE_INCOMPAT_CSUM_V3,
38d5adf3 DW	126	"journal_checksum_v3" },
03efde8a AD	127	{ 0, 0, 0 },
	128	};
	129
36caf25f	130	const char *e2p_feature2string(int compat, unsigned int mask)
d7b701de TT	131	{
	132	struct feature *f;
	133	static char buf[20];
	134	char fchar;
	135	int fnum;
	136
	137	for (f = feature_list; f->string; f++) {
	138	if ((compat == f->compat) &&
	139	(mask == f->mask))
	140	return f->string;
	141	}
	142	switch (compat) {
	143	case E2P_FEATURE_COMPAT:
	144	fchar = 'C';
	145	break;
	146	case E2P_FEATURE_INCOMPAT:
	147	fchar = 'I';
	148	break;
	149	case E2P_FEATURE_RO_INCOMPAT:
	150	fchar = 'R';
	151	break;
	152	default:
	153	fchar = '?';
	154	break;
	155	}
	156	for (fnum = 0; mask >>= 1; fnum++);
	157	sprintf(buf, "FEATURE_%c%d", fchar, fnum);
	158	return buf;
	159	}
	160
36caf25f	161	int e2p_string2feature(char string, int compat_type, unsigned int *mask)
d7b701de TT	162	{
	163	struct feature *f;
	164	char *eptr;
	165	int num;
	166
	167	for (f = feature_list; f->string; f++) {
	168	if (!strcasecmp(string, f->string)) {
36caf25f	169	*compat_type = f->compat;
d7b701de TT	170	*mask = f->mask;
	171	return 0;
	172	}
	173	}
	174	if (strncasecmp(string, "FEATURE_", 8))
	175	return 1;
	176
	177	switch (string[8]) {
	178	case 'c':
	179	case 'C':
36caf25f	180	*compat_type = E2P_FEATURE_COMPAT;
d7b701de TT	181	break;
	182	case 'i':
	183	case 'I':
36caf25f	184	*compat_type = E2P_FEATURE_INCOMPAT;
d7b701de TT	185	break;
	186	case 'r':
	187	case 'R':
36caf25f	188	*compat_type = E2P_FEATURE_RO_INCOMPAT;
d7b701de TT	189	break;
	190	default:
	191	return 1;
	192	}
	193	if (string[9] == 0)
	194	return 1;
	195	num = strtol(string+9, &eptr, 10);
63cd76d6	196	if (num > 31 \|\| num < 0)
d7b701de TT	197	return 1;
	198	if (*eptr)
	199	return 1;
	200	*mask = 1 << num;
	201	return 0;
	202	}
	203
03efde8a AD	204	const char *e2p_jrnl_feature2string(int compat, unsigned int mask)
	205	{
	206	struct feature *f;
	207	static char buf[20];
	208	char fchar;
	209	int fnum;
	210
	211	for (f = jrnl_feature_list; f->string; f++) {
	212	if ((compat == f->compat) &&
	213	(mask == f->mask))
	214	return f->string;
	215	}
	216	switch (compat) {
	217	case E2P_FEATURE_COMPAT:
	218	fchar = 'C';
	219	break;
	220	case E2P_FEATURE_INCOMPAT:
	221	fchar = 'I';
	222	break;
	223	case E2P_FEATURE_RO_INCOMPAT:
	224	fchar = 'R';
	225	break;
	226	default:
	227	fchar = '?';
	228	break;
	229	}
	230	for (fnum = 0; mask >>= 1; fnum++);
	231	sprintf(buf, "FEATURE_%c%d", fchar, fnum);
	232	return buf;
	233	}
	234
	235	int e2p_jrnl_string2feature(char string, int compat_type, unsigned int *mask)
	236	{
	237	struct feature *f;
	238	char *eptr;
	239	int num;
	240
	241	for (f = jrnl_feature_list; f->string; f++) {
	242	if (!strcasecmp(string, f->string)) {
	243	*compat_type = f->compat;
	244	*mask = f->mask;
	245	return 0;
	246	}
	247	}
	248	if (strncasecmp(string, "FEATURE_", 8))
	249	return 1;
	250
	251	switch (string[8]) {
	252	case 'c':
	253	case 'C':
	254	*compat_type = E2P_FEATURE_COMPAT;
	255	break;
	256	case 'i':
	257	case 'I':
	258	*compat_type = E2P_FEATURE_INCOMPAT;
	259	break;
	260	case 'r':
	261	case 'R':
	262	*compat_type = E2P_FEATURE_RO_INCOMPAT;
	263	break;
	264	default:
	265	return 1;
	266	}
	267	if (string[9] == 0)
268	return 1;
269	num = strtol(string+9, &eptr, 10);
63cd76d6	270	if (num > 31 \|\| num < 0)
03efde8a AD	271	return 1;
	272	if (*eptr)
	273	return 1;
	274	*mask = 1 << num;
	275	return 0;
	276	}
d7b701de TT	277	static char skip_over_blanks(char cp)
	278	{
	279	while (cp && isspace(cp))
	280	cp++;
	281	return cp;
	282	}
	283
36caf25f	284	static char skip_over_word(char cp)
d7b701de	285	{
944ab713	286	while (cp && !isspace(cp) && *cp != ',')
d7b701de TT	287	cp++;
	288	return cp;
	289	}
	290
944ab713 TT	291	/*
	292	* Edit a feature set array as requested by the user. The ok_array,
	293	* if set, allows the application to limit what features the user is
efc6f628	294	* allowed to set or clear using this function. If clear_ok_array is set,
7100351d	295	* then use it tell whether or not it is OK to clear a filesystem feature.
944ab713	296	*/
7100351d	297	int e2p_edit_feature2(const char str, __u32 compat_array, __u32 *ok_array,
efc6f628	298	__u32 clear_ok_array, int type_err,
7100351d	299	unsigned int *mask_err)
d7b701de	300	{
2711ca1c BB	301	char cp, buf, *next;
2711ca1c BB	302	int neg;
36caf25f TT	303	unsigned int mask;
36caf25f TT	304	int compat_type;
2711ca1c	305	int rc = 0;
d7b701de	306
7100351d TT	307	if (!clear_ok_array)
	308	clear_ok_array = ok_array;
	309
	310	if (type_err)
	311	*type_err = 0;
	312	if (mask_err)
	313	*mask_err = 0;
	314
d7b701de	315	buf = malloc(strlen(str)+1);
944ab713	316	if (!buf)
d7b701de	317	return 1;
d7b701de	318	strcpy(buf, str);
9dc6ad1e	319	for (cp = buf; cp && *cp; cp = next ? next+1 : 0) {
d7b701de TT	320	neg = 0;
	321	cp = skip_over_blanks(cp);
	322	next = skip_over_word(cp);
efc6f628	323
d7b701de TT	324	if (*next == 0)
	325	next = 0;
	326	else
	327	*next = 0;
9dc6ad1e TT	328
	329	if ((strcasecmp(cp, "none") == 0) \|\|
	330	(strcasecmp(cp, "clear") == 0)) {
	331	compat_array[0] = 0;
	332	compat_array[1] = 0;
	333	compat_array[2] = 0;
	334	continue;
	335	}
	336
d7b701de TT	337	switch (*cp) {
	338	case '-':
	339	case '^':
	340	neg++;
9e30fb23	341	/* fallthrough */
d7b701de TT	342	case '+':
	343	cp++;
	344	break;
	345	}
2711ca1c BB	346	if (e2p_string2feature(cp, &compat_type, &mask)) {
	347	rc = 1;
	348	break;
	349	}
7100351d	350	if (neg) {
efc6f628	351	if (clear_ok_array &&
7100351d TT	352	!(clear_ok_array[compat_type] & mask)) {
	353	rc = 1;
	354	if (type_err)
efc6f628	355	*type_err = (compat_type \|
7100351d TT	356	E2P_FEATURE_NEGATE_FLAG);
	357	if (mask_err)
	358	*mask_err = mask;
	359	break;
	360	}
36caf25f	361	compat_array[compat_type] &= ~mask;
7100351d TT	362	} else {
	363	if (ok_array && !(ok_array[compat_type] & mask)) {
	364	rc = 1;
	365	if (type_err)
	366	*type_err = compat_type;
	367	if (mask_err)
	368	*mask_err = mask;
	369	break;
	370	}
36caf25f	371	compat_array[compat_type] \|= mask;
7100351d	372	}
d7b701de	373	}
2711ca1c BB	374	free(buf);
2711ca1c BB	375	return rc;
d7b701de	376	}
7100351d TT	377
	378	int e2p_edit_feature(const char str, __u32 compat_array, __u32 *ok_array)
	379	{
	380	return e2p_edit_feature2(str, compat_array, ok_array, 0, 0, 0);
	381	}
03efde8a AD	382
	383	#ifdef TEST_PROGRAM
	384	int main(int argc, char **argv)
	385	{
	386	int compat, compat2, i;
	387	unsigned int mask, mask2;
	388	const char *str;
	389	struct feature *f;
	390
	391	for (i = 0; i < 2; i++) {
	392	if (i == 0) {
	393	f = feature_list;
	394	printf("Feature list:\n");
	395	} else {
	396	printf("\nJournal feature list:\n");
	397	f = jrnl_feature_list;
	398	}
	399	for (; f->string; f++) {
	400	if (i == 0) {
	401	e2p_string2feature((char *)f->string, &compat,
	402	&mask);
	403	str = e2p_feature2string(compat, mask);
	404	} else {
	405	e2p_jrnl_string2feature((char *)f->string,
	406	&compat, &mask);
	407	str = e2p_jrnl_feature2string(compat, mask);
	408	}
	409
	410	printf("\tCompat = %d, Mask = %u, %s\n",
	411	compat, mask, f->string);
	412	if (strcmp(f->string, str)) {
	413	if (e2p_string2feature((char *) str, &compat2,
	414	&mask2) \|\|
	415	(compat2 != compat) \|\|
	416	(mask2 != mask)) {
	417	fprintf(stderr, "Failure!\n");
	418	exit(1);
	419	}
	420	}
	421	}
	422	}
	423	exit(0);
	424	}
	425	#endif