[PATCH 21/43] xfs_db: support dumping realtime group data and superblocks

Darrick J. Wong
2024-10-11T01:30:03Z

Allow dumping of realtime device superblocks and the new fields in the
primary superblock that were added for rtgroups support.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
---
db/Makefile | 1 +
db/command.c | 2 +
db/field.c | 10 ++++++
db/field.h | 5 +++
db/rtgroup.c | 100 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
db/rtgroup.h | 15 +++++++++
db/sb.c | 8 +++++
db/type.c | 6 +++
db/type.h | 1 +
9 files changed, 148 insertions(+)
create mode 100644 db/rtgroup.c
create mode 100644 db/rtgroup.h

diff --git a/db/Makefile b/db/Makefile
index 83389376c36c46..02eeead25b49d0 100644
--- a/db/Makefile
+++ b/db/Makefile
@@ -49,6 +49,7 @@ HFILES = \
output.h \
print.h \
quit.h \
+ rtgroup.h \
sb.h \
sig.h \
strvec.h \
diff --git a/db/command.c b/db/command.c
index 6cda03e9856d84..1b46c3fec08a0e 100644
--- a/db/command.c
+++ b/db/command.c
@@ -39,6 +39,7 @@
#include "fsmap.h"
#include "crc.h"
#include "fuzz.h"
+#include "rtgroup.h"

cmdinfo_t *cmdtab;
int ncmds;
@@ -135,6 +136,7 @@ init_commands(void)
output_init();
print_init();
quit_init();
+ rtsb_init();
sb_init();
type_init();
write_init();
diff --git a/db/field.c b/db/field.c
index 946684415f65d3..f70955ef57a323 100644
--- a/db/field.c
+++ b/db/field.c
@@ -23,6 +23,7 @@
#include "dir2.h"
#include "dir2sf.h"
#include "symlink.h"
+#include "rtgroup.h"

#define PPOFF(f) bitize(offsetof(struct xfs_parent_rec, f))
const field_t parent_flds[] = {
@@ -52,6 +53,13 @@ const ftattr_t ftattrtab[] = {
{ FLDT_AGNUMBER, "agnumber", fp_num, "%u", SI(bitsz(xfs_agnumber_t)),
FTARG_DONULL, NULL, NULL },

+ { FLDT_RGBLOCK, "rgblock", fp_num, "%u", SI(bitsz(xfs_rgblock_t)),
+ FTARG_DONULL, NULL, NULL },
+ { FLDT_RTXLEN, "rtxlen", fp_num, "%u", SI(bitsz(xfs_rtxlen_t)),
+ FTARG_DONULL, NULL, NULL },
+ { FLDT_RGNUMBER, "rgnumber", fp_num, "%u", SI(bitsz(xfs_rgnumber_t)),
+ FTARG_DONULL, NULL, NULL },
+
/* attr fields */
{ FLDT_ATTR, "attr", NULL, (char *)attr_flds, attr_size, FTARG_SIZE,
NULL, attr_flds },
@@ -357,6 +365,8 @@ const ftattr_t ftattrtab[] = {
NULL, NULL },
{ FLDT_SB, "sb", NULL, (char *)sb_flds, sb_size, FTARG_SIZE, NULL,
sb_flds },
+ { FLDT_RTSB, "rtsb", NULL, (char *)rtsb_flds, rtsb_size, FTARG_SIZE,
+ NULL, rtsb_flds },

/* CRC enabled symlink */
{ FLDT_SYMLINK_CRC, "symlink", NULL, (char *)symlink_crc_flds,
diff --git a/db/field.h b/db/field.h
index 9746676a6c7ac9..8797a75f669246 100644
--- a/db/field.h
+++ b/db/field.h
@@ -15,6 +15,10 @@ typedef enum fldt {
FLDT_AGINONN,
FLDT_AGNUMBER,

+ FLDT_RGBLOCK,
+ FLDT_RTXLEN,
+ FLDT_RGNUMBER,
+
/* attr fields */
FLDT_ATTR,
FLDT_ATTR_BLKINFO,
@@ -167,6 +171,7 @@ typedef enum fldt {
FLDT_QCNT,
FLDT_QWARNCNT,
FLDT_SB,
+ FLDT_RTSB,

/* CRC enabled symlink */
FLDT_SYMLINK_CRC,
diff --git a/db/rtgroup.c b/db/rtgroup.c
new file mode 100644
index 00000000000000..5cda1a4f35efb6
--- /dev/null
+++ b/db/rtgroup.c
@@ -0,0 +1,100 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2022-2024 Oracle. All Rights Reserved.
+ * Author: Darrick J. Wong <djwong@kernel.org>
+ */
+#include "libxfs.h"
+#include "libxlog.h"
+#include "command.h"
+#include "type.h"
+#include "faddr.h"
+#include "fprint.h"
+#include "field.h"
+#include "io.h"
+#include "sb.h"
+#include "bit.h"
+#include "output.h"
+#include "init.h"
+#include "rtgroup.h"
+
+#define uuid_equal(s,d) (platform_uuid_compare((s),(d)) == 0)
+
+static int rtsb_f(int argc, char **argv);
+static void rtsb_help(void);
+
+static const cmdinfo_t rtsb_cmd =
+ { "rtsb", NULL, rtsb_f, 0, 0, 1, "",
+ N_("set current address to realtime sb header"), rtsb_help };
+
+void
+rtsb_init(void)
+{
+ if (xfs_has_rtgroups(mp))
+ add_command(&rtsb_cmd);
+}
+
+#define OFF(f) bitize(offsetof(struct xfs_rtsb, rsb_ ## f))
+#define SZC(f) szcount(struct xfs_rtsb, rsb_ ## f)
+const field_t rtsb_flds[] = {
+ { "magicnum", FLDT_UINT32X, OI(OFF(magicnum)), C1, 0, TYP_NONE },
+ { "crc", FLDT_CRC, OI(OFF(crc)), C1, 0, TYP_NONE },
+ { "pad", FLDT_UINT32X, OI(OFF(pad)), C1, 0, TYP_NONE },
+ { "fname", FLDT_CHARNS, OI(OFF(fname)), CI(SZC(fname)), 0, TYP_NONE },
+ { "uuid", FLDT_UUID, OI(OFF(uuid)), C1, 0, TYP_NONE },
+ { "meta_uuid", FLDT_UUID, OI(OFF(meta_uuid)), C1, 0, TYP_NONE },
+ { NULL }
+};
+
+const field_t rtsb_hfld[] = {
+ { "", FLDT_RTSB, OI(0), C1, 0, TYP_NONE },
+ { NULL }
+};
+
+static void
+rtsb_help(void)
+{
+ dbprintf(_(
+"\n"
+" seek to realtime superblock\n"
+"\n"
+" Example:\n"
+"\n"
+" 'rtsb - set location to realtime superblock, set type to 'rtsb'\n"
+"\n"
+" Located in the first block of the realtime volume, the rt superblock\n"
+" contains the base information for the realtime section of a filesystem.\n"
+"\n"
+));
+}
+
+static int
+rtsb_f(
+ int argc,
+ char **argv)
+{
+ int c;
+
+ while ((c = getopt(argc, argv, "")) != -1) {
+ switch (c) {
+ default:
+ rtsb_help();
+ return 0;
+ }
+ }
+
+ cur_agno = NULLAGNUMBER;
+
+ ASSERT(typtab[TYP_RTSB].typnm == TYP_RTSB);
+ set_rt_cur(&typtab[TYP_RTSB], XFS_RTSB_DADDR, XFS_FSB_TO_BB(mp, 1),
+ DB_RING_ADD, NULL);
+ return 0;
+}
+
+int
+rtsb_size(
+ void *obj,
+ int startoff,
+ int idx)
+{
+ return bitize(mp->m_sb.sb_blocksize);
+}
diff --git a/db/rtgroup.h b/db/rtgroup.h
new file mode 100644
index 00000000000000..85960a3fb9f5c9
--- /dev/null
+++ b/db/rtgroup.h
@@ -0,0 +1,15 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2022-2024 Oracle. All Rights Reserved.
+ * Author: Darrick J. Wong <djwong@kernel.org>
+ */
+#ifndef DB_RTGROUP_H_
+#define DB_RTGROUP_H_
+
+extern const struct field rtsb_flds[];
+extern const struct field rtsb_hfld[];
+
+extern void rtsb_init(void);
+extern int rtsb_size(void *obj, int startoff, int idx);
+
+#endif /* DB_RTGROUP_H_ */
diff --git a/db/sb.c b/db/sb.c
index 0d6076bc7ed408..9f9be6c4e149a9 100644
--- a/db/sb.c
+++ b/db/sb.c
@@ -124,8 +124,12 @@ const field_t sb_flds[] = {
{ "features2", FLDT_UINT32X, OI(OFF(features2)), C1, 0, TYP_NONE },
{ "bad_features2", FLDT_UINT32X, OI(OFF(bad_features2)),
premetadirfld_count, FLD_COUNT, TYP_NONE },
+ { "rgblklog", FLDT_UINT8D, OI(OFF(rgblklog)), metadirfld_count,
+ FLD_COUNT, TYP_NONE },
{ "metadirpad0", FLDT_UINT8X, OI(OFF(metadirpad0)), metadirfld_count,
FLD_COUNT, TYP_NONE },
+ { "metadirpad1", FLDT_UINT16X, OI(OFF(metadirpad1)), metadirfld_count,
+ FLD_COUNT, TYP_NONE },
{ "features_compat", FLDT_UINT32X, OI(OFF(features_compat)),
C1, 0, TYP_NONE },
{ "features_ro_compat", FLDT_UINT32X, OI(OFF(features_ro_compat)),
@@ -141,6 +145,10 @@ const field_t sb_flds[] = {
{ "meta_uuid", FLDT_UUID, OI(OFF(meta_uuid)), C1, 0, TYP_NONE },
{ "metadirino", FLDT_INO, OI(OFF(metadirino)), metadirfld_count,
FLD_COUNT, TYP_INODE },
+ { "rgcount", FLDT_RGNUMBER, OI(OFF(rgcount)), metadirfld_count,
+ FLD_COUNT, TYP_NONE },
+ { "rgextents", FLDT_RTXLEN, OI(OFF(rgextents)), metadirfld_count,
+ FLD_COUNT, TYP_NONE },
{ NULL }
};

diff --git a/db/type.c b/db/type.c
index efe7044569d357..d875c0c636553b 100644
--- a/db/type.c
+++ b/db/type.c
@@ -28,6 +28,7 @@
#include "text.h"
#include "symlink.h"
#include "fuzz.h"
+#include "rtgroup.h"

static const typ_t *findtyp(char *name);
static int type_f(int argc, char **argv);
@@ -60,6 +61,7 @@ static const typ_t __typtab[] = {
{ TYP_LOG, "log", NULL, NULL, NULL, TYP_F_NO_CRC_OFF },
{ TYP_RTBITMAP, "rtbitmap", handle_text, NULL, NULL, TYP_F_NO_CRC_OFF },
{ TYP_RTSUMMARY, "rtsummary", handle_text, NULL, NULL, TYP_F_NO_CRC_OFF },
+ { TYP_RTSB, "rtsb", handle_struct, rtsb_hfld, NULL, TYP_F_NO_CRC_OFF },
{ TYP_SB, "sb", handle_struct, sb_hfld, NULL, TYP_F_NO_CRC_OFF },
{ TYP_SYMLINK, "symlink", handle_string, NULL, NULL, TYP_F_NO_CRC_OFF },
{ TYP_TEXT, "text", handle_text, NULL, NULL, TYP_F_NO_CRC_OFF },
@@ -102,6 +104,8 @@ static const typ_t __typtab_crc[] = {
{ TYP_LOG, "log", NULL, NULL, NULL, TYP_F_NO_CRC_OFF },
{ TYP_RTBITMAP, "rtbitmap", handle_text, NULL, NULL, TYP_F_NO_CRC_OFF },
{ TYP_RTSUMMARY, "rtsummary", handle_text, NULL, NULL, TYP_F_NO_CRC_OFF },
+ { TYP_RTSB, "rtsb", handle_struct, rtsb_hfld, &xfs_rtsb_buf_ops,
+ XFS_SB_CRC_OFF },
{ TYP_SB, "sb", handle_struct, sb_hfld, &xfs_sb_buf_ops,
XFS_SB_CRC_OFF },
{ TYP_SYMLINK, "symlink", handle_struct, symlink_crc_hfld,
@@ -146,6 +150,8 @@ static const typ_t __typtab_spcrc[] = {
{ TYP_LOG, "log", NULL, NULL, NULL, TYP_F_NO_CRC_OFF },
{ TYP_RTBITMAP, "rtbitmap", handle_text, NULL, NULL, TYP_F_NO_CRC_OFF },
{ TYP_RTSUMMARY, "rtsummary", handle_text, NULL, NULL, TYP_F_NO_CRC_OFF },
+ { TYP_RTSB, "rtsb", handle_struct, rtsb_hfld, &xfs_rtsb_buf_ops,
+ XFS_SB_CRC_OFF },
{ TYP_SB, "sb", handle_struct, sb_hfld, &xfs_sb_buf_ops,
XFS_SB_CRC_OFF },
{ TYP_SYMLINK, "symlink", handle_struct, symlink_crc_hfld,
diff --git a/db/type.h b/db/type.h
index 397dcf5464c6c8..d4efa4b0fab541 100644
--- a/db/type.h
+++ b/db/type.h
@@ -30,6 +30,7 @@ typedef enum typnm
TYP_LOG,
TYP_RTBITMAP,
TYP_RTSUMMARY,
+ TYP_RTSB,
TYP_SB,
TYP_SYMLINK,
TYP_TEXT,