[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_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_VERITY,
			"verity"},

	{	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"},
	{       E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_CASEFOLD,
			"casefold"},
	{       E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_CASEFOLD,
			"fname_encoding"},
	{	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"},
faae7aa0 TT	77	{ E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_VERITY,
faae7aa0 TT	78	"verity"},
477007e1	79
d7b701de TT	80	{ E2P_FEATURE_INCOMPAT, EXT2_FEATURE_INCOMPAT_COMPRESSION,
	81	"compression" },
	82	{ E2P_FEATURE_INCOMPAT, EXT2_FEATURE_INCOMPAT_FILETYPE,
	83	"filetype" },
	84	{ E2P_FEATURE_INCOMPAT, EXT3_FEATURE_INCOMPAT_RECOVER,
	85	"needs_recovery" },
c2204b32 TT	86	{ E2P_FEATURE_INCOMPAT, EXT3_FEATURE_INCOMPAT_JOURNAL_DEV,
c2204b32 TT	87	"journal_dev" },
ba1e1254 TT	88	{ E2P_FEATURE_INCOMPAT, EXT3_FEATURE_INCOMPAT_EXTENTS,
ba1e1254 TT	89	"extent" },
39dc1c45 TT	90	{ E2P_FEATURE_INCOMPAT, EXT3_FEATURE_INCOMPAT_EXTENTS,
39dc1c45 TT	91	"extents" },
c046ac7f TT	92	{ E2P_FEATURE_INCOMPAT, EXT2_FEATURE_INCOMPAT_META_BG,
c046ac7f TT	93	"meta_bg" },
477007e1 TT	94	{ E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_64BIT,
477007e1 TT	95	"64bit" },
0f5eba75 AD	96	{ E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP,
0f5eba75 AD	97	"mmp" },
c2d4300b	98	{ E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_FLEX_BG,
0f5eba75	99	"flex_bg"},
660b4c3b TT	100	{ E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_EA_INODE,
	101	"ea_inode"},
	102	{ E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_DIRDATA,
	103	"dirdata"},
2ed0adbc DW	104	{ E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_CSUM_SEED,
2ed0adbc DW	105	"metadata_csum_seed"},
660b4c3b TT	106	{ E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_LARGEDIR,
660b4c3b TT	107	"large_dir"},
94846158	108	{ E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_INLINE_DATA,
660b4c3b	109	"inline_data"},
22f22ab1 TT	110	{ E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_ENCRYPT,
22f22ab1 TT	111	"encrypt"},
28887533 TT	112	{ E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_CASEFOLD,
	113	"casefold"},
	114	{ E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_CASEFOLD,
e7236a94	115	"fname_encoding"},
d7b701de TT	116	{ 0, 0, 0 },
	117	};
	118
03efde8a AD	119	static struct feature jrnl_feature_list[] = {
	120	{ E2P_FEATURE_COMPAT, JFS_FEATURE_COMPAT_CHECKSUM,
	121	"journal_checksum" },
	122
	123	{ E2P_FEATURE_INCOMPAT, JFS_FEATURE_INCOMPAT_REVOKE,
	124	"journal_incompat_revoke" },
8c778b3a TT	125	{ E2P_FEATURE_INCOMPAT, JFS_FEATURE_INCOMPAT_64BIT,
8c778b3a TT	126	"journal_64bit" },
03efde8a AD	127	{ E2P_FEATURE_INCOMPAT, JFS_FEATURE_INCOMPAT_ASYNC_COMMIT,
03efde8a AD	128	"journal_async_commit" },
382fad03 DW	129	{ E2P_FEATURE_INCOMPAT, JFS_FEATURE_INCOMPAT_CSUM_V2,
382fad03 DW	130	"journal_checksum_v2" },
38d5adf3 DW	131	{ E2P_FEATURE_INCOMPAT, JFS_FEATURE_INCOMPAT_CSUM_V3,
38d5adf3 DW	132	"journal_checksum_v3" },
03efde8a AD	133	{ 0, 0, 0 },
	134	};
	135
36caf25f	136	const char *e2p_feature2string(int compat, unsigned int mask)
d7b701de TT	137	{
	138	struct feature *f;
	139	static char buf[20];
	140	char fchar;
	141	int fnum;
	142
	143	for (f = feature_list; f->string; f++) {
	144	if ((compat == f->compat) &&
	145	(mask == f->mask))
	146	return f->string;
	147	}
	148	switch (compat) {
	149	case E2P_FEATURE_COMPAT:
	150	fchar = 'C';
	151	break;
	152	case E2P_FEATURE_INCOMPAT:
	153	fchar = 'I';
	154	break;
	155	case E2P_FEATURE_RO_INCOMPAT:
	156	fchar = 'R';
	157	break;
	158	default:
	159	fchar = '?';
	160	break;
	161	}
	162	for (fnum = 0; mask >>= 1; fnum++);
	163	sprintf(buf, "FEATURE_%c%d", fchar, fnum);
	164	return buf;
	165	}
	166
36caf25f	167	int e2p_string2feature(char string, int compat_type, unsigned int *mask)
d7b701de TT	168	{
	169	struct feature *f;
	170	char *eptr;
	171	int num;
	172
	173	for (f = feature_list; f->string; f++) {
	174	if (!strcasecmp(string, f->string)) {
36caf25f	175	*compat_type = f->compat;
d7b701de TT	176	*mask = f->mask;
	177	return 0;
	178	}
	179	}
	180	if (strncasecmp(string, "FEATURE_", 8))
	181	return 1;
	182
	183	switch (string[8]) {
	184	case 'c':
	185	case 'C':
36caf25f	186	*compat_type = E2P_FEATURE_COMPAT;
d7b701de TT	187	break;
	188	case 'i':
	189	case 'I':
36caf25f	190	*compat_type = E2P_FEATURE_INCOMPAT;
d7b701de TT	191	break;
	192	case 'r':
	193	case 'R':
36caf25f	194	*compat_type = E2P_FEATURE_RO_INCOMPAT;
d7b701de TT	195	break;
	196	default:
	197	return 1;
	198	}
	199	if (string[9] == 0)
	200	return 1;
	201	num = strtol(string+9, &eptr, 10);
63cd76d6	202	if (num > 31 \|\| num < 0)
d7b701de TT	203	return 1;
	204	if (*eptr)
	205	return 1;
	206	*mask = 1 << num;
	207	return 0;
	208	}
	209
03efde8a AD	210	const char *e2p_jrnl_feature2string(int compat, unsigned int mask)
	211	{
	212	struct feature *f;
	213	static char buf[20];
	214	char fchar;
	215	int fnum;
	216
	217	for (f = jrnl_feature_list; f->string; f++) {
	218	if ((compat == f->compat) &&
	219	(mask == f->mask))
	220	return f->string;
	221	}
	222	switch (compat) {
	223	case E2P_FEATURE_COMPAT:
	224	fchar = 'C';
	225	break;
	226	case E2P_FEATURE_INCOMPAT:
	227	fchar = 'I';
	228	break;
	229	case E2P_FEATURE_RO_INCOMPAT:
	230	fchar = 'R';
	231	break;
	232	default:
	233	fchar = '?';
	234	break;
	235	}
	236	for (fnum = 0; mask >>= 1; fnum++);
	237	sprintf(buf, "FEATURE_%c%d", fchar, fnum);
	238	return buf;
	239	}
	240
	241	int e2p_jrnl_string2feature(char string, int compat_type, unsigned int *mask)
	242	{
	243	struct feature *f;
	244	char *eptr;
	245	int num;
	246
	247	for (f = jrnl_feature_list; f->string; f++) {
	248	if (!strcasecmp(string, f->string)) {
	249	*compat_type = f->compat;
	250	*mask = f->mask;
	251	return 0;
	252	}
	253	}
	254	if (strncasecmp(string, "FEATURE_", 8))
	255	return 1;
	256
	257	switch (string[8]) {
	258	case 'c':
	259	case 'C':
	260	*compat_type = E2P_FEATURE_COMPAT;
	261	break;
	262	case 'i':
	263	case 'I':
	264	*compat_type = E2P_FEATURE_INCOMPAT;
	265	break;
	266	case 'r':
	267	case 'R':
	268	*compat_type = E2P_FEATURE_RO_INCOMPAT;
	269	break;
	270	default:
	271	return 1;
	272	}
	273	if (string[9] == 0)
274	return 1;
275	num = strtol(string+9, &eptr, 10);
63cd76d6	276	if (num > 31 \|\| num < 0)
03efde8a AD	277	return 1;
	278	if (*eptr)
	279	return 1;
	280	*mask = 1 << num;
	281	return 0;
	282	}
d7b701de TT	283	static char skip_over_blanks(char cp)
	284	{
	285	while (cp && isspace(cp))
	286	cp++;
	287	return cp;
	288	}
	289
36caf25f	290	static char skip_over_word(char cp)
d7b701de	291	{
944ab713	292	while (cp && !isspace(cp) && *cp != ',')
d7b701de TT	293	cp++;
	294	return cp;
	295	}
	296
944ab713 TT	297	/*
	298	* Edit a feature set array as requested by the user. The ok_array,
	299	* if set, allows the application to limit what features the user is
efc6f628	300	* allowed to set or clear using this function. If clear_ok_array is set,
7100351d	301	* then use it tell whether or not it is OK to clear a filesystem feature.
944ab713	302	*/
7100351d	303	int e2p_edit_feature2(const char str, __u32 compat_array, __u32 *ok_array,
efc6f628	304	__u32 clear_ok_array, int type_err,
7100351d	305	unsigned int *mask_err)
d7b701de	306	{
2711ca1c BB	307	char cp, buf, *next;
2711ca1c BB	308	int neg;
36caf25f TT	309	unsigned int mask;
36caf25f TT	310	int compat_type;
2711ca1c	311	int rc = 0;
d7b701de	312
7100351d TT	313	if (!clear_ok_array)
	314	clear_ok_array = ok_array;
	315
	316	if (type_err)
	317	*type_err = 0;
	318	if (mask_err)
	319	*mask_err = 0;
	320
d7b701de	321	buf = malloc(strlen(str)+1);
944ab713	322	if (!buf)
d7b701de	323	return 1;
d7b701de	324	strcpy(buf, str);
9dc6ad1e	325	for (cp = buf; cp && *cp; cp = next ? next+1 : 0) {
d7b701de TT	326	neg = 0;
	327	cp = skip_over_blanks(cp);
	328	next = skip_over_word(cp);
efc6f628	329
d7b701de TT	330	if (*next == 0)
	331	next = 0;
	332	else
	333	*next = 0;
9dc6ad1e TT	334
	335	if ((strcasecmp(cp, "none") == 0) \|\|
	336	(strcasecmp(cp, "clear") == 0)) {
	337	compat_array[0] = 0;
	338	compat_array[1] = 0;
	339	compat_array[2] = 0;
	340	continue;
	341	}
	342
d7b701de TT	343	switch (*cp) {
	344	case '-':
	345	case '^':
	346	neg++;
9e30fb23	347	/* fallthrough */
d7b701de TT	348	case '+':
	349	cp++;
	350	break;
	351	}
2711ca1c BB	352	if (e2p_string2feature(cp, &compat_type, &mask)) {
	353	rc = 1;
	354	break;
	355	}
7100351d	356	if (neg) {
efc6f628	357	if (clear_ok_array &&
7100351d TT	358	!(clear_ok_array[compat_type] & mask)) {
	359	rc = 1;
	360	if (type_err)
efc6f628	361	*type_err = (compat_type \|
7100351d TT	362	E2P_FEATURE_NEGATE_FLAG);
	363	if (mask_err)
	364	*mask_err = mask;
	365	break;
	366	}
36caf25f	367	compat_array[compat_type] &= ~mask;
7100351d TT	368	} else {
	369	if (ok_array && !(ok_array[compat_type] & mask)) {
	370	rc = 1;
	371	if (type_err)
	372	*type_err = compat_type;
	373	if (mask_err)
	374	*mask_err = mask;
	375	break;
	376	}
36caf25f	377	compat_array[compat_type] \|= mask;
7100351d	378	}
d7b701de	379	}
2711ca1c BB	380	free(buf);
2711ca1c BB	381	return rc;
d7b701de	382	}
7100351d TT	383
	384	int e2p_edit_feature(const char str, __u32 compat_array, __u32 *ok_array)
	385	{
	386	return e2p_edit_feature2(str, compat_array, ok_array, 0, 0, 0);
	387	}
03efde8a AD	388
	389	#ifdef TEST_PROGRAM
	390	int main(int argc, char **argv)
	391	{
	392	int compat, compat2, i;
	393	unsigned int mask, mask2;
	394	const char *str;
	395	struct feature *f;
	396
	397	for (i = 0; i < 2; i++) {
	398	if (i == 0) {
	399	f = feature_list;
	400	printf("Feature list:\n");
	401	} else {
	402	printf("\nJournal feature list:\n");
	403	f = jrnl_feature_list;
	404	}
	405	for (; f->string; f++) {
	406	if (i == 0) {
	407	e2p_string2feature((char *)f->string, &compat,
	408	&mask);
	409	str = e2p_feature2string(compat, mask);
	410	} else {
	411	e2p_jrnl_string2feature((char *)f->string,
	412	&compat, &mask);
	413	str = e2p_jrnl_feature2string(compat, mask);
	414	}
	415
	416	printf("\tCompat = %d, Mask = %u, %s\n",
	417	compat, mask, f->string);
	418	if (strcmp(f->string, str)) {
	419	if (e2p_string2feature((char *) str, &compat2,
	420	&mask2) \|\|
	421	(compat2 != compat) \|\|
	422	(mask2 != mask)) {
	423	fprintf(stderr, "Failure!\n");
	424	exit(1);
	425	}
	426	}
	427	}
	428	}
	429	exit(0);
	430	}
	431	#endif