db: add the logformat command

Add the new logformat command to format the log to a specified log cycle
and/or log stripe unit. This command is primarily for testing purposes
and is only available in expert mode.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

diff --git a/db/Makefile b/db/Makefile
index fb01bddeb6b2cc3cacdb607ef756980374142f2d..8260da3fc2063ccefbbf81b95b5443a94e3fe91a 100644 (file)
--- a/db/Makefile
+++ b/db/Makefile
@@ -11,8 +11,8 @@ HFILES = addr.h agf.h agfl.h agi.h attr.h attrshort.h bit.h block.h bmap.h \
        btblock.h bmroot.h check.h command.h convert.h debug.h \
        dir2.h dir2sf.h dquot.h echo.h faddr.h field.h \
        flist.h fprint.h frag.h freesp.h hash.h help.h init.h inode.h input.h \
-       io.h malloc.h metadump.h output.h print.h quit.h sb.h sig.h strvec.h \
-       text.h type.h write.h attrset.h symlink.h
+       io.h logformat.h malloc.h metadump.h output.h print.h quit.h sb.h \
+        sig.h strvec.h text.h type.h write.h attrset.h symlink.h
 CFILES = $(HFILES:.h=.c)
 LSRCFILES = xfs_admin.sh xfs_ncheck.sh xfs_metadump.sh
 

diff --git a/db/command.c b/db/command.c
index 2189e008689e8676d536fc29ed3c4df207362179..3c17a1e4d6955bbe1bb636c11a6b466e68a536bd 100644 (file)
--- a/db/command.c
+++ b/db/command.c
@@ -40,6 +40,7 @@
 #include "inode.h"
 #include "input.h"
 #include "io.h"
+#include "logformat.h"
 #include "metadump.h"
 #include "output.h"
 #include "print.h"
@@ -131,6 +132,7 @@ init_commands(void)
        hash_init();
        inode_init();
        input_init();
+       logformat_init();
        io_init();
        metadump_init();
        output_init();

diff --git a/db/logformat.c b/db/logformat.c
new file mode 100644 (file)
index 0000000..254f33d
--- /dev/null
+++ b/db/logformat.c
@@ -0,0 +1,149 @@
+/*
+ * Copyright (c) 2015 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 "init.h"
+#include "output.h"
+#include "libxlog.h"
+
+#define MAX_LSUNIT     256 * 1024      /* max log buf. size */
+
+static int
+logformat_f(int argc, char **argv)
+{
+       xfs_daddr_t     head_blk;
+       xfs_daddr_t     tail_blk;
+       int             logversion;
+       int             lsunit = -1;
+       int             cycle = -1;
+       int             error;
+       int             c;
+
+       logversion = xfs_sb_version_haslogv2(&mp->m_sb) ? 2 : 1;
+
+       while ((c = getopt(argc, argv, "c:s:")) != EOF) {
+               switch (c) {
+               case 'c':
+                       cycle = strtol(optarg, NULL, 0);
+                       if (cycle == 0) {
+                               dbprintf("invalid cycle\n");
+                               return -1;
+                       }
+                       break;
+               case 's':
+                       lsunit = strtol(optarg, NULL, 0);
+                       /*
+                        * The log stripe unit must be block aligned and no
+                        * larger than 256k.
+                        */
+                       if (lsunit > 1 &&
+                           (lsunit % mp->m_sb.sb_blocksize ||
+                           (logversion == 2 && lsunit > MAX_LSUNIT))) {
+                               dbprintf("invalid log stripe unit\n");
+                               return -1;
+                       }
+                       break;
+               default:
+                       dbprintf("invalid option\n");
+                       return -1;
+               }
+       }
+
+       /*
+        * Check whether the log is dirty. This also determines the current log
+        * cycle if we have to use it by default below.
+        */
+       memset(mp->m_log, 0, sizeof(struct xlog));
+       mp->m_log->l_mp = mp;
+       mp->m_log->l_dev = mp->m_logdev_targp;
+       mp->m_log->l_logBBsize = XFS_FSB_TO_BB(mp, mp->m_sb.sb_logblocks);
+       mp->m_log->l_logBBstart = XFS_FSB_TO_DADDR(mp, mp->m_sb.sb_logstart);
+       mp->m_log->l_sectBBsize = BBSIZE;
+       if (xfs_sb_version_hassector(&mp->m_sb))
+               mp->m_log->l_sectBBsize <<= (mp->m_sb.sb_logsectlog - BBSHIFT);
+       mp->m_log->l_sectBBsize = BTOBB(mp->m_log->l_sectBBsize);
+
+       error = xlog_find_tail(mp->m_log, &head_blk, &tail_blk);
+       if (error) {
+               dbprintf("could not find log head/tail\n");
+               return -1;
+       }
+       if (head_blk != tail_blk) {
+               dbprintf(_(
+                       "The log is dirty. Please mount to replay the log.\n"));
+               return -1;
+       }
+
+       /*
+        * Use the current cycle and/or log stripe unit if either is not
+        * provided by the user.
+        */
+       if (cycle < 0)
+               cycle = mp->m_log->l_curr_cycle;
+       if (lsunit < 0)
+               lsunit = mp->m_sb.sb_logsunit;
+
+       dbprintf("Formatting the log to cycle %d, stripe unit %d bytes.\n",
+                cycle, lsunit);
+       error = libxfs_log_clear(mp->m_logdev_targp, NULL,
+                                mp->m_log->l_logBBstart,
+                                mp->m_log->l_logBBsize,
+                                &mp->m_sb.sb_uuid, logversion, lsunit,
+                                XLOG_FMT, cycle, false);
+       if (error) {
+               dbprintf("error formatting log - %d\n", error);
+               return error;
+       }
+
+       return 0;
+}
+
+static void
+logformat_help(void)
+{
+       dbprintf(_(
+"\n"
+" The 'logformat' command reformats (clears) the log to the specified log\n"
+" cycle and log stripe unit. If the log cycle is not specified, the log is\n"
+" reformatted to the current cycle. If the log stripe unit is not specified,\n"
+" the stripe unit from the filesystem superblock is used.\n"
+"\n"
+       ));
+}
+
+static const struct cmdinfo logformat_cmd = {
+       .name =         "logformat",
+       .altname =      NULL,
+       .cfunc =        logformat_f,
+       .argmin =       0,
+       .argmax =       4,
+       .canpush =      0,
+       .args =         N_("[-c cycle] [-s sunit]"),
+       .oneline =      N_("reformat the log"),
+       .help =         logformat_help,
+};
+
+void
+logformat_init(void)
+{
+       if (!expert_mode)
+               return;
+
+       add_command(&logformat_cmd);
+}

diff --git a/db/logformat.h b/db/logformat.h
new file mode 100644 (file)
index 0000000..f9763ee
--- /dev/null
+++ b/db/logformat.h
@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2015 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
+ */
+
+void logformat_init(void);