xfs_spaceman: add aginfo command
Add an aginfo command to display AG geomtry and fiddle with things.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
diff --git a/io/Makefile b/io/Makefile
index 9738fb5..a56b104 100644
--- a/io/Makefile
+++ b/io/Makefile
@@ -8,7 +8,7 @@
LTCOMMAND = xfs_io
LSRCFILES = xfs_bmap.sh xfs_freeze.sh xfs_mkfile.sh
HFILES = init.h io.h
-CFILES = init.c \
+CFILES = init.c aginfo.c \
attr.c bmap.c bulkstat.c crc32cselftest.c cowextsize.c encrypt.c \
file.c freeze.c fsync.c getrusage.c imap.c inject.c label.c link.c \
mmap.c open.c parent.c pread.c prealloc.c pwrite.c reflink.c \
diff --git a/io/aginfo.c b/io/aginfo.c
new file mode 100644
index 0000000..e896aa6
--- /dev/null
+++ b/io/aginfo.c
@@ -0,0 +1,156 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2021 Oracle.
+ * All Rights Reserved.
+ */
+#include "platform_defs.h"
+#include "libxfs.h"
+#include "command.h"
+#include "input.h"
+#include "init.h"
+#include "io.h"
+#include "libfrog/logging.h"
+#include "libfrog/paths.h"
+#include "libfrog/fsgeom.h"
+
+static cmdinfo_t aginfo_cmd;
+
+static int
+report_aginfo(
+ struct xfs_fd *xfd,
+ xfs_agnumber_t agno,
+ int oflag)
+{
+ struct xfs_ag_geometry ageo = { 0 };
+ bool update = false;
+ int ret;
+
+ ret = -xfrog_ag_geometry(xfd->fd, agno, &ageo);
+ if (ret) {
+ xfrog_perror(ret, "aginfo");
+ return 1;
+ }
+
+ switch (oflag) {
+ case 0:
+ ageo.ag_flags |= XFS_AG_FLAG_UPDATE;
+ ageo.ag_flags &= ~XFS_AG_FLAG_NOALLOC;
+ update = true;
+ break;
+ case 1:
+ ageo.ag_flags |= (XFS_AG_FLAG_UPDATE | XFS_AG_FLAG_NOALLOC);
+ update = true;
+ break;
+ }
+
+ if (update) {
+ ret = -xfrog_ag_geometry(xfd->fd, agno, &ageo);
+ if (ret) {
+ xfrog_perror(ret, "aginfo update");
+ return 1;
+ }
+ }
+
+ printf(_("AG: %u\n"), ageo.ag_number);
+ printf(_("Blocks: %u\n"), ageo.ag_length);
+ printf(_("Free Blocks: %u\n"), ageo.ag_freeblks);
+ printf(_("Inodes: %u\n"), ageo.ag_icount);
+ printf(_("Free Inodes: %u\n"), ageo.ag_ifree);
+ printf(_("Sick: 0x%x\n"), ageo.ag_sick);
+ printf(_("Checked: 0x%x\n"), ageo.ag_checked);
+ printf(_("Flags: 0x%x\n"), ageo.ag_flags);
+
+ return 0;
+}
+
+#define OPT_STRING ("a:o:")
+
+/* Display or modify AG status. */
+static int
+aginfo_f(
+ int argc,
+ char **argv)
+{
+ struct xfs_fd xfd = XFS_FD_INIT(file->fd);
+ unsigned long long x;
+ xfs_agnumber_t agno = NULLAGNUMBER;
+ int oflag = -1;
+ int c;
+ int ret = 0;
+
+ ret = -xfd_prepare_geometry(&xfd);
+ if (ret) {
+ xfrog_perror(ret, "xfd_prepare_geometry");
+ exitcode = 1;
+ return 1;
+ }
+
+ while ((c = getopt(argc, argv, OPT_STRING)) != EOF) {
+ switch (c) {
+ case 'a':
+ errno = 0;
+ x = strtoll(optarg, NULL, 10);
+ if (!errno && x >= NULLAGNUMBER)
+ errno = ERANGE;
+ if (errno) {
+ perror("aginfo");
+ return 1;
+ }
+ agno = x;
+ break;
+ case 'o':
+ errno = 0;
+ x = strtoll(optarg, NULL, 10);
+ if (!errno && x != 0 && x != 1)
+ errno = ERANGE;
+ if (errno) {
+ perror("aginfo");
+ return 1;
+ }
+ oflag = x;
+ break;
+ default:
+ return command_usage(&aginfo_cmd);
+ }
+ }
+
+ if (agno != NULLAGNUMBER) {
+ ret = report_aginfo(&xfd, agno, oflag);
+ } else {
+ for (agno = 0; !ret && agno < xfd.fsgeom.agcount; agno++) {
+ ret = report_aginfo(&xfd, agno, oflag);
+ }
+ }
+
+ return ret;
+}
+
+static void
+aginfo_help(void)
+{
+ printf(_(
+"\n"
+"Report allocation group geometry.\n"
+"\n"
+" -a agno -- Report on the given allocation group.\n"
+" -o num -- Set or clear the NOALLOC flag.\n"
+"\n"));
+
+}
+
+static cmdinfo_t aginfo_cmd = {
+ .name = "aginfo",
+ .cfunc = aginfo_f,
+ .argmin = 0,
+ .argmax = -1,
+ .args = "[-a agno] [-o arg]",
+ .flags = CMD_NOMAP_OK,
+ .help = aginfo_help,
+};
+
+void
+aginfo_init(void)
+{
+ aginfo_cmd.oneline = _("Get/set XFS allocation group state."),
+ add_command(&aginfo_cmd);
+}
diff --git a/io/init.c b/io/init.c
index 96536a2..78d7d04 100644
--- a/io/init.c
+++ b/io/init.c
@@ -44,6 +44,7 @@
static void
init_commands(void)
{
+ aginfo_init();
atomicupdate_init();
attr_init();
bmap_init();
diff --git a/io/io.h b/io/io.h
index ce05c40..a32684c 100644
--- a/io/io.h
+++ b/io/io.h
@@ -189,3 +189,4 @@
extern void crc32cselftest_init(void);
extern void bulkstat_init(void);
extern void atomicupdate_init(void);
+extern void aginfo_init(void);
diff --git a/man/man8/xfs_io.8 b/man/man8/xfs_io.8
index f44a176..e20d7b8 100644
--- a/man/man8/xfs_io.8
+++ b/man/man8/xfs_io.8
@@ -1530,7 +1530,21 @@
flag.
.RE
.PD
-
+.TP
+.BI "aginfo [ \-a " agno " ] [ \-o " nr " ]"
+Show information about or update the state of allocation groups.
+.RE
+.RS 1.0i
+.PD 0
+.TP
+.BI \-a
+Act only on a specific allocation group.
+.TP
+.BI \-o
+If 0, clear the NOALLOC flag.
+If 1, set the NOALLOC flag.
+.PD
+.RE
.SH OTHER COMMANDS
.TP
