Adding upstream version 1.47.0.upstream/1.47.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 449 insertions, 0 deletions

diff --git a/lib/e2p/feature.c b/lib/e2p/feature.c
new file mode 100644
index 0000000..29b7b15
--- /dev/null
+++ b/lib/e2p/feature.c
@@ -0,0 +1,449 @@
+/*
+ * 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_COMPAT, EXT4_FEATURE_COMPAT_FAST_COMMIT,
+			"fast_commit" },
+	{	E2P_FEATURE_COMPAT, EXT4_FEATURE_COMPAT_STABLE_INODES,
+			"stable_inodes" },
+	{	E2P_FEATURE_COMPAT, EXT4_FEATURE_COMPAT_ORPHAN_FILE,
+			"orphan_file" },
+
+	{	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_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_ORPHAN_PRESENT,
+			"orphan_present" },
+
+	{	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, JBD2_FEATURE_COMPAT_CHECKSUM,
+                       "journal_checksum" },
+
+       {       E2P_FEATURE_INCOMPAT, JBD2_FEATURE_INCOMPAT_REVOKE,
+                       "journal_incompat_revoke" },
+       {       E2P_FEATURE_INCOMPAT, JBD2_FEATURE_INCOMPAT_64BIT,
+                       "journal_64bit" },
+       {       E2P_FEATURE_INCOMPAT, JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT,
+                       "journal_async_commit" },
+       {       E2P_FEATURE_INCOMPAT, JBD2_FEATURE_INCOMPAT_CSUM_V2,
+                       "journal_checksum_v2" },
+       {       E2P_FEATURE_INCOMPAT, JBD2_FEATURE_INCOMPAT_CSUM_V3,
+                       "journal_checksum_v3" },
+       {       0, 0, 0 },
+};
+
+void e2p_feature_to_string(int compat, unsigned int mask, char *buf,
+                           size_t buf_len)
+{
+	struct feature  *f;
+	char	fchar;
+	int	fnum;
+
+	for (f = feature_list; f->string; f++) {
+		if ((compat == f->compat) &&
+		    (mask == f->mask)) {
+			strncpy(buf, f->string, buf_len);
+			buf[buf_len - 1] = 0;
+			return;
+		}
+	}
+	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);
+}
+
+const char *e2p_feature2string(int compat, unsigned int mask)
+{
+	static char buf[20];
+
+	e2p_feature_to_string(compat, mask, buf, sizeof(buf) / sizeof(buf[0]));
+	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