Adding upstream version 1.47.0.upstream/1.47.0upstream

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

1 files changed, 134 insertions, 0 deletions

diff --git a/lib/e2p/ljs.c b/lib/e2p/ljs.c
new file mode 100644
index 0000000..5972819
--- /dev/null
+++ b/lib/e2p/ljs.c
@@ -0,0 +1,134 @@
+/*
+ * ljs.c			- List the contents of an journal superblock
+ *
+ * Copyright (C) 1995, 1996, 1997  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 <sys/types.h>
+#include <string.h>
+#include <grp.h>
+#include <pwd.h>
+#include <time.h>
+
+#include "ext2fs/ext2_fs.h"
+#include "ext2fs/ext2fs.h"
+#include "e2p.h"
+#include "ext2fs/kernel-jbd.h"
+
+#ifdef WORDS_BIGENDIAN
+#define e2p_be32(x) (x)
+#else
+static __u32 e2p_swab32(__u32 val)
+{
+	return ((val>>24) | ((val>>8)&0xFF00) |
+		((val<<8)&0xFF0000) | (val<<24));
+}
+
+#define e2p_be32(x) e2p_swab32(x)
+#endif
+
+/*
+ * This function is copied from kernel-jbd.h's function
+ * jbd2_journal_get_num_fc_blks() to avoid inter-library dependencies.
+ */
+static inline int get_num_fc_blks(journal_superblock_t *jsb)
+{
+	int num_fc_blocks = e2p_be32(jsb->s_num_fc_blks);
+
+	return num_fc_blocks ? num_fc_blocks : JBD2_DEFAULT_FAST_COMMIT_BLOCKS;
+}
+
+static const char *journal_checksum_type_str(__u8 type)
+{
+	switch (type) {
+	case JBD2_CRC32C_CHKSUM:
+		return "crc32c";
+	default:
+		return "unknown";
+	}
+}
+
+void e2p_list_journal_super(FILE *f, char *journal_sb_buf,
+			    int exp_block_size, int flags)
+{
+	journal_superblock_t *jsb = (journal_superblock_t *) journal_sb_buf;
+	__u32 *mask_ptr, mask, m;
+	unsigned int size;
+	int j, printed = 0;
+	unsigned int i, nr_users;
+	int num_fc_blks = 0;
+	int journal_blks = 0;
+
+	if (flags & E2P_LIST_JOURNAL_FLAG_FC)
+		num_fc_blks = get_num_fc_blks((journal_superblock_t *)journal_sb_buf);
+	journal_blks = ntohl(jsb->s_maxlen) - num_fc_blks;
+	fprintf(f, "%s", "Journal features:        ");
+	for (i=0, mask_ptr=&jsb->s_feature_compat; i <3; i++,mask_ptr++) {
+		mask = e2p_be32(*mask_ptr);
+		for (j=0,m=1; j < 32; j++, m<<=1) {
+			if (mask & m) {
+				fprintf(f, " %s", e2p_jrnl_feature2string(i, m));
+				printed++;
+			}
+		}
+	}
+	if (printed == 0)
+		fprintf(f, " (none)");
+	fputc('\n', f);
+	fputs("Total journal size:       ", f);
+	size = (ntohl(jsb->s_blocksize) / 1024) * ntohl(jsb->s_maxlen);
+	if (size < 8192)
+		fprintf(f, "%uk\n", size);
+	else
+		fprintf(f, "%uM\n", size >> 10);
+	nr_users = (unsigned int) ntohl(jsb->s_nr_users);
+	if (exp_block_size != (int) ntohl(jsb->s_blocksize))
+		fprintf(f, "Journal block size:       %u\n",
+			(unsigned int)ntohl(jsb->s_blocksize));
+	fprintf(f, "Total journal blocks:     %u\n",
+		(unsigned int)(journal_blks + num_fc_blks));
+	fprintf(f, "Max transaction length:   %u\n",
+		(unsigned int)journal_blks);
+	fprintf(f, "Fast commit length:       %u\n",
+		(unsigned int)num_fc_blks);
+
+	if (ntohl(jsb->s_first) != 1)
+		fprintf(f, "Journal first block:      %u\n",
+			(unsigned int)ntohl(jsb->s_first));
+	fprintf(f, "Journal sequence:         0x%08x\n"
+		"Journal start:            %u\n",
+		(unsigned int)ntohl(jsb->s_sequence),
+		(unsigned int)ntohl(jsb->s_start));
+	if (nr_users != 1)
+		fprintf(f, "Journal number of users:  %u\n", nr_users);
+	if (jsb->s_feature_compat & e2p_be32(JBD2_FEATURE_COMPAT_CHECKSUM))
+		fprintf(f, "%s", "Journal checksum type:    crc32\n");
+	if ((jsb->s_feature_incompat &
+	     e2p_be32(JBD2_FEATURE_INCOMPAT_CSUM_V3)) ||
+	    (jsb->s_feature_incompat &
+	     e2p_be32(JBD2_FEATURE_INCOMPAT_CSUM_V2)))
+		fprintf(f, "Journal checksum type:    %s\n"
+			"Journal checksum:         0x%08x\n",
+			journal_checksum_type_str(jsb->s_checksum_type),
+			e2p_be32(jsb->s_checksum));
+	if ((nr_users > 1) ||
+	    !e2p_is_null_uuid(&jsb->s_users[0])) {
+		for (i=0; i < nr_users && i < JBD2_USERS_MAX; i++) {
+			printf(i ? "                          %s\n"
+			       : "Journal users:            %s\n",
+			       e2p_uuid2str(&jsb->s_users[i * UUID_SIZE]));
+		}
+	}
+	if (jsb->s_errno != 0)
+		fprintf(f, "Journal errno:            %d\n",
+			(int) ntohl(jsb->s_errno));
+}