[37/45] xfs_io: add a command to display realtime group information

Commit Message

Darrick J. Wong Dec. 30, 2022, 10:19 p.m. UTC

From: Darrick J. Wong <[e-mail]>

Add a new 'rginfo' command to xfs_io so that we can display realtime
group geometry.

Signed-off-by: Darrick J. Wong <[e-mail]>
---
 io/aginfo.c       |   96 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 libfrog/fsgeom.c  |   18 ++++++++++
 libfrog/fsgeom.h  |    2 +
 man/man8/xfs_io.8 |   11 ++++++
 4 files changed, 127 insertions(+)

Patch

diff --git a/io/aginfo.c b/io/aginfo.c
index 06e1cb7ba88..037af54b60c 100644
--- a/io/aginfo.c
+++ b/io/aginfo.c
@@ -14,6 +14,7 @@ 
 #include "libfrog/fsgeom.h"
 
 static cmdinfo_t aginfo_cmd;
+static cmdinfo_t rginfo_cmd;
 
 static int
 report_aginfo(
@@ -111,9 +112,104 @@  static cmdinfo_t aginfo_cmd = {
 	.help = aginfo_help,
 };
 
+static int
+report_rginfo(
+	struct xfs_fd		*xfd,
+	xfs_rgnumber_t		rgno)
+{
+	struct xfs_rtgroup_geometry	rgeo = { 0 };
+	int			ret;
+
+	ret = -xfrog_rtgroup_geometry(xfd->fd, rgno, &rgeo);
+	if (ret) {
+		xfrog_perror(ret, "rginfo");
+		return 1;
+	}
+
+	printf(_("RG: %u\n"),		rgeo.rg_number);
+	printf(_("Blocks: %u\n"),	rgeo.rg_length);
+	printf(_("Sick: 0x%x\n"),	rgeo.rg_sick);
+	printf(_("Checked: 0x%x\n"),	rgeo.rg_checked);
+	printf(_("Flags: 0x%x\n"),	rgeo.rg_flags);
+
+	return 0;
+}
+
+/* Display rtgroup status. */
+static int
+rginfo_f(
+	int			argc,
+	char			**argv)
+{
+	struct xfs_fd		xfd = XFS_FD_INIT(file->fd);
+	unsigned long long	x;
+	xfs_rgnumber_t		rgno = NULLRGNUMBER;
+	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, "r:")) != EOF) {
+		switch (c) {
+		case 'r':
+			errno = 0;
+			x = strtoll(optarg, NULL, 10);
+			if (!errno && x >= NULLRGNUMBER)
+				errno = ERANGE;
+			if (errno) {
+				perror("rginfo");
+				return 1;
+			}
+			rgno = x;
+			break;
+		default:
+			return command_usage(&rginfo_cmd);
+		}
+	}
+
+	if (rgno != NULLRGNUMBER) {
+		ret = report_rginfo(&xfd, rgno);
+	} else {
+		for (rgno = 0; !ret && rgno < xfd.fsgeom.rgcount; rgno++) {
+			ret = report_rginfo(&xfd, rgno);
+		}
+	}
+
+	return ret;
+}
+
+static void
+rginfo_help(void)
+{
+	printf(_(
+"\n"
+"Report realtime group geometry.\n"
+"\n"
+" -r rgno  -- Report on the given realtime group.\n"
+"\n"));
+
+}
+
+static cmdinfo_t rginfo_cmd = {
+	.name = "rginfo",
+	.cfunc = rginfo_f,
+	.argmin = 0,
+	.argmax = -1,
+	.args = "[-r rgno]",
+	.flags = CMD_NOMAP_OK,
+	.help = rginfo_help,
+};
+
 void
 aginfo_init(void)
 {
 	aginfo_cmd.oneline = _("Get XFS allocation group state.");
 	add_command(&aginfo_cmd);
+	rginfo_cmd.oneline = _("Get XFS realtime group state.");
+	add_command(&rginfo_cmd);
 }
diff --git a/libfrog/fsgeom.c b/libfrog/fsgeom.c
index 66e813a863f..5a89c3e3ca3 100644
--- a/libfrog/fsgeom.c
+++ b/libfrog/fsgeom.c
@@ -210,3 +210,21 @@  xfrog_ag_geometry(
 		return -errno;
 	return 0;
 }
+
+/*
+ * Try to obtain a rt group's geometry.  Returns zero or a negative error code.
+ */
+int
+xfrog_rtgroup_geometry(
+	int			fd,
+	unsigned int		rgno,
+	struct xfs_rtgroup_geometry	*rgeo)
+{
+	int			ret;
+
+	rgeo->rg_number = rgno;
+	ret = ioctl(fd, XFS_IOC_RTGROUP_GEOMETRY, rgeo);
+	if (ret)
+		return -errno;
+	return 0;
+}
diff --git a/libfrog/fsgeom.h b/libfrog/fsgeom.h
index bef864fce63..8c21b240bb2 100644
--- a/libfrog/fsgeom.h
+++ b/libfrog/fsgeom.h
@@ -9,6 +9,8 @@  void xfs_report_geom(struct xfs_fsop_geom *geo, const char *mntpoint,
 		const char *logname, const char *rtname);
 int xfrog_geometry(int fd, struct xfs_fsop_geom *fsgeo);
 int xfrog_ag_geometry(int fd, unsigned int agno, struct xfs_ag_geometry *ageo);
+int xfrog_rtgroup_geometry(int fd, unsigned int rgno,
+		struct xfs_rtgroup_geometry *rgeo);
 
 /*
  * Structure for recording whatever observations we want about the level of
diff --git a/man/man8/xfs_io.8 b/man/man8/xfs_io.8
index 95c63f32a2a..16768275b5c 100644
--- a/man/man8/xfs_io.8
+++ b/man/man8/xfs_io.8
@@ -1556,6 +1556,17 @@  Show information about or update the state of allocation groups.
 Act only on a specific allocation group.
 .PD
 .RE
+.TP
+.BI "rginfo [ \-r " rgno " ]"
+Show information about or update the state of realtime allocation groups.
+.RE
+.RS 1.0i
+.PD 0
+.TP
+.BI \-a
+Act only on a specific realtime group.
+.PD
+.RE
 
 .SH OTHER COMMANDS
 .TP