From: Dave Chinner <dchinner@xxxxxxxxxx>
Add an control interface for purging speculative
preallocation via the new ioctls.
Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx>
[darrick: change xfsctl to ioctl]
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
spaceman/Makefile | 2 -
spaceman/init.c | 1
spaceman/prealloc.c | 111 +++++++++++++++++++++++++++++++++++++++++++++++++++
spaceman/space.h | 1
4 files changed, 114 insertions(+), 1 deletion(-)
create mode 100644 spaceman/prealloc.c
diff --git a/spaceman/Makefile b/spaceman/Makefile
index c63a4fc..6aad746 100644
--- a/spaceman/Makefile
+++ b/spaceman/Makefile
@@ -7,7 +7,7 @@ include $(TOPDIR)/include/builddefs
LTCOMMAND = xfs_spaceman
HFILES = init.h space.h
-CFILES = init.c file.c trim.c
+CFILES = init.c file.c prealloc.c trim.c
LLDLIBS = $(LIBXCMD)
LTDEPENDENCIES = $(LIBXCMD)
diff --git a/spaceman/init.c b/spaceman/init.c
index 0958377..93a8a1e 100644
--- a/spaceman/init.c
+++ b/spaceman/init.c
@@ -39,6 +39,7 @@ init_commands(void)
{
file_init();
help_init();
+ prealloc_init();
quit_init();
trim_init();
}
diff --git a/spaceman/prealloc.c b/spaceman/prealloc.c
new file mode 100644
index 0000000..71c0d80
--- /dev/null
+++ b/spaceman/prealloc.c
@@ -0,0 +1,111 @@
+/*
+ * Copyright (c) 2012 Red Hat, Inc.
+ * All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libxfs.h"
+#include "command.h"
+#include "input.h"
+#include "init.h"
+#include "space.h"
+
+static cmdinfo_t prealloc_cmd;
+
+/*
+ * Control preallocation amounts.
+ */
+static int
+prealloc_f(
+ int argc,
+ char **argv)
+{
+ struct xfs_fs_eofblocks eofb = {0};
+ int c;
+
+ eofb.eof_version = XFS_EOFBLOCKS_VERSION;
+
+ while ((c = getopt(argc, argv, "g:m:p:su:")) != EOF) {
+ switch (c) {
+ case 'g':
+ eofb.eof_flags |= XFS_EOF_FLAGS_GID;
+ eofb.eof_gid = atoi(optarg);
+ break;
+ case 'u':
+ eofb.eof_flags |= XFS_EOF_FLAGS_UID;
+ eofb.eof_uid = atoi(optarg);
+ break;
+ case 'p':
+ eofb.eof_flags |= XFS_EOF_FLAGS_PRID;
+ eofb.eof_prid = atoi(optarg);
+ break;
+ case 's':
+ eofb.eof_flags |= XFS_EOF_FLAGS_SYNC;
+ break;
+ case 'm':
+ eofb.eof_flags |= XFS_EOF_FLAGS_MINFILESIZE;
+ eofb.eof_min_file_size = cvtnum(file->geom.blocksize,
+ file->geom.sectsize,
+ optarg);
+ break;
+ case '?':
+ default:
+ return command_usage(&prealloc_cmd);
+ }
+ }
+ if (optind != argc)
+ return command_usage(&prealloc_cmd);
+
+ if (ioctl(file->fd, XFS_IOC_FREE_EOFBLOCKS, &eofb) < 0) {
+ fprintf(stderr, _("%s: XFS_IOC_FREE_EOFBLOCKS on %s: %s\n"),
+ progname, file->name, strerror(errno));
+ }
+ return 0;
+}
+
+static void
+prealloc_help(void)
+{
+ printf(_(
+"\n"
+"Control speculative preallocation\n"
+"\n"
+"Options: [-s] [-ugp id] [-m minlen]\n"
+"\n"
+" -s -- wait for removal to complete\n"
+" -u uid -- remove prealloc on files matching user <uid>\n"
+" -g gid -- remove prealloc on files matching group <gid>\n"
+" -p prid -- remove prealloc on files matching project <prid>\n"
+" -m minlen -- only consider files larger than <minlen>\n"
+"\n"));
+
+}
+
+void
+prealloc_init(void)
+{
+ prealloc_cmd.name = "prealloc";
+ prealloc_cmd.altname = "prealloc";
+ prealloc_cmd.cfunc = prealloc_f;
+ prealloc_cmd.argmin = 1;
+ prealloc_cmd.argmax = -1;
+ prealloc_cmd.args = "[-s] [-ugp id] [-m minlen]";
+ prealloc_cmd.flags = CMD_FLAG_ONESHOT;
+ prealloc_cmd.oneline = _("Control speculative preallocation");
+ prealloc_cmd.help = prealloc_help;
+
+ add_command(&prealloc_cmd);
+}
+
diff --git a/spaceman/space.h b/spaceman/space.h
index 7b4f034..0ae3116 100644
--- a/spaceman/space.h
+++ b/spaceman/space.h
@@ -33,5 +33,6 @@ extern int addfile(char *, int , xfs_fsop_geom_t *, int);
extern void file_init(void);
extern void help_init(void);
+extern void prealloc_init(void);
extern void quit_init(void);
extern void trim_init(void);
--
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