meta: export process state dump

Various parts of process state dump are exposed
through most appropriate virual files/dirs

Change-Id: Iff30f8ea76552f2f6d9c98def688c5ec4bc6f2af
BUG: 1089216
Signed-off-by: Anand Avati <avati@redhat.com>
Reviewed-on: http://review.gluster.org/7542
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Harshavardhana <harsha@harshavardhana.net>

30 files changed, 419 insertions, 22 deletions

diff --git a/xlators/meta/src/Makefile.am b/xlators/meta/src/Makefile.am
index 530fea9792b..b705e86b60a 100644
--- a/xlators/meta/src/Makefile.am
+++ b/xlators/meta/src/Makefile.am
@@ -4,27 +4,33 @@ xlatordir = $(libdir)/glusterfs/$(PACKAGE_VERSION)/xlator
 meta_la_LDFLAGS = -module -avoid-version
 
 meta_la_SOURCES = meta.c meta-helpers.c meta-defaults.c \
-	plugins/root-dir.c \
-	plugins/graphs-dir.c \
-	plugins/frames-file.c \
-	plugins/graph-dir.c \
-	plugins/active-link.c \
-	plugins/xlator-dir.c \
-	plugins/top-link.c \
-	plugins/logging-dir.c \
-	plugins/logfile-link.c \
-	plugins/loglevel-file.c \
-	plugins/process_uuid-file.c \
-	plugins/volfile-file.c \
-	plugins/view-dir.c \
-	plugins/subvolumes-dir.c \
-	plugins/subvolume-link.c \
-	plugins/type-file.c \
-	plugins/version-file.c \
-	plugins/options-dir.c \
-	plugins/option-file.c \
-	plugins/cmdline-file.c \
-	plugins/name-file.c
+	root-dir.c \
+	graphs-dir.c \
+	frames-file.c \
+	graph-dir.c \
+	active-link.c \
+	xlator-dir.c \
+	top-link.c \
+	logging-dir.c \
+	logfile-link.c \
+	loglevel-file.c \
+	process_uuid-file.c \
+	volfile-file.c \
+	view-dir.c \
+	subvolumes-dir.c \
+	subvolume-link.c \
+	type-file.c \
+	version-file.c \
+	options-dir.c \
+	option-file.c \
+	cmdline-file.c \
+	name-file.c \
+	private-file.c \
+	history-file.c \
+	mallinfo-file.c \
+	meminfo-file.c \
+	measure-file.c \
+	profile-file.c
 
 meta_la_LIBADD = $(top_builddir)/libglusterfs/src/libglusterfs.la
 
diff --git a/xlators/meta/src/plugins/active-link.c b/xlators/meta/src/active-link.c
index 99d38597bdf..99d38597bdf 100644
--- a/xlators/meta/src/plugins/active-link.c
+++ b/xlators/meta/src/active-link.c
diff --git a/xlators/meta/src/plugins/cmdline-file.c b/xlators/meta/src/cmdline-file.c
index 1eded6d19b8..1eded6d19b8 100644
--- a/xlators/meta/src/plugins/cmdline-file.c
+++ b/xlators/meta/src/cmdline-file.c
diff --git a/xlators/meta/src/plugins/frames-file.c b/xlators/meta/src/frames-file.c
index 0c3b9a2eb71..0c3b9a2eb71 100644
--- a/xlators/meta/src/plugins/frames-file.c
+++ b/xlators/meta/src/frames-file.c
diff --git a/xlators/meta/src/plugins/graph-dir.c b/xlators/meta/src/graph-dir.c
index 3cd6b482e74..3cd6b482e74 100644
--- a/xlators/meta/src/plugins/graph-dir.c
+++ b/xlators/meta/src/graph-dir.c
diff --git a/xlators/meta/src/plugins/graphs-dir.c b/xlators/meta/src/graphs-dir.c
index 4a538fb6176..4a538fb6176 100644
--- a/xlators/meta/src/plugins/graphs-dir.c
+++ b/xlators/meta/src/graphs-dir.c
diff --git a/xlators/meta/src/history-file.c b/xlators/meta/src/history-file.c
new file mode 100644
index 00000000000..d88040fe58f
--- /dev/null
+++ b/xlators/meta/src/history-file.c
@@ -0,0 +1,52 @@
+/*
+   Copyright (c) 2014 Red Hat, Inc. <http://www.redhat.com>
+   This file is part of GlusterFS.
+
+   This file is licensed to you under your choice of the GNU Lesser
+   General Public License, version 3 or any later version (LGPLv3 or
+   later), or the GNU General Public License, version 2 (GPLv2), in all
+   cases as published by the Free Software Foundation.
+*/
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include "xlator.h"
+#include "defaults.h"
+
+#include "meta-mem-types.h"
+#include "meta.h"
+#include "strfd.h"
+#include "statedump.h"
+
+
+static int
+history_file_fill (xlator_t *this, inode_t *file, strfd_t *strfd)
+{
+	xlator_t *xl = NULL;
+
+	xl = meta_ctx_get (file, this);
+
+	gf_proc_dump_xlator_history (xl, strfd);
+
+	return strfd->size;
+}
+
+
+static struct meta_ops history_file_ops = {
+	.file_fill = history_file_fill,
+};
+
+
+int
+meta_history_file_hook (call_frame_t *frame, xlator_t *this, loc_t *loc,
+			dict_t *xdata)
+{
+	meta_ops_set (loc->inode, this, &history_file_ops);
+
+	meta_ctx_set (loc->inode, this, meta_ctx_get (loc->parent, this));
+
+	return 0;
+}
diff --git a/xlators/meta/src/plugins/logfile-link.c b/xlators/meta/src/logfile-link.c
index 435cab80c33..435cab80c33 100644
--- a/xlators/meta/src/plugins/logfile-link.c
+++ b/xlators/meta/src/logfile-link.c
diff --git a/xlators/meta/src/plugins/logging-dir.c b/xlators/meta/src/logging-dir.c
index 783d38e8e12..783d38e8e12 100644
--- a/xlators/meta/src/plugins/logging-dir.c
+++ b/xlators/meta/src/logging-dir.c
diff --git a/xlators/meta/src/plugins/loglevel-file.c b/xlators/meta/src/loglevel-file.c
index 24ac68ddc69..24ac68ddc69 100644
--- a/xlators/meta/src/plugins/loglevel-file.c
+++ b/xlators/meta/src/loglevel-file.c
diff --git a/xlators/meta/src/mallinfo-file.c b/xlators/meta/src/mallinfo-file.c
new file mode 100644
index 00000000000..38589f515ff
--- /dev/null
+++ b/xlators/meta/src/mallinfo-file.c
@@ -0,0 +1,44 @@
+/*
+   Copyright (c) 2014 Red Hat, Inc. <http://www.redhat.com>
+   This file is part of GlusterFS.
+
+   This file is licensed to you under your choice of the GNU Lesser
+   General Public License, version 3 or any later version (LGPLv3 or
+   later), or the GNU General Public License, version 2 (GPLv2), in all
+   cases as published by the Free Software Foundation.
+*/
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include "xlator.h"
+#include "defaults.h"
+
+#include "meta-mem-types.h"
+#include "meta.h"
+#include "statedump.h"
+
+
+static int
+mallinfo_file_fill (xlator_t *this, inode_t *file, strfd_t *strfd)
+{
+	gf_proc_dump_mallinfo (strfd);
+	return strfd->size;
+}
+
+
+static struct meta_ops mallinfo_file_ops = {
+	.file_fill = mallinfo_file_fill,
+};
+
+
+int
+meta_mallinfo_file_hook (call_frame_t *frame, xlator_t *this, loc_t *loc,
+			dict_t *xdata)
+{
+	meta_ops_set (loc->inode, this, &mallinfo_file_ops);
+
+	return 0;
+}
diff --git a/xlators/meta/src/measure-file.c b/xlators/meta/src/measure-file.c
new file mode 100644
index 00000000000..ccc78232dfe
--- /dev/null
+++ b/xlators/meta/src/measure-file.c
@@ -0,0 +1,92 @@
+/*
+   Copyright (c) 2014 Red Hat, Inc. <http://www.redhat.com>
+   This file is part of GlusterFS.
+
+   This file is licensed to you under your choice of the GNU Lesser
+   General Public License, version 3 or any later version (LGPLv3 or
+   later), or the GNU General Public License, version 2 (GPLv2), in all
+   cases as published by the Free Software Foundation.
+*/
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include "xlator.h"
+#include "defaults.h"
+
+#include "meta-mem-types.h"
+#include "meta.h"
+#include "strfd.h"
+
+
+static int
+measure_file_fill (xlator_t *this, inode_t *file, strfd_t *strfd)
+{
+	strprintf (strfd, "%d\n", this->ctx->measure_latency);
+
+	return strfd->size;
+}
+
+
+static int
+measure_writev (call_frame_t *frame, xlator_t *this, fd_t *fd,
+		struct iovec *iov, int count, off_t offset,
+		uint32_t flags, struct iobref *iobref, dict_t *xdata)
+{
+	struct iatt dummy = { };
+	long int num = -1;
+
+	num = strtol (iov[0].iov_base, NULL, 0);
+	this->ctx->measure_latency = !!num;
+
+	META_STACK_UNWIND (writev, frame, iov_length (iov, count), 0,
+			   &dummy, &dummy, xdata);
+	return 0;
+}
+
+
+int
+measure_truncate (call_frame_t *frame, xlator_t *this, loc_t *loc,
+		   off_t offset, dict_t *xdata)
+{
+	struct iatt iatt = { };
+
+	meta_iatt_fill (&iatt, loc->inode, IA_IFREG);
+
+	META_STACK_UNWIND (truncate, frame, 0, 0, &iatt, &iatt, xdata);
+	return 0;
+}
+
+
+int
+measure_ftruncate (call_frame_t *frame, xlator_t *this, fd_t *fd,
+		   off_t offset, dict_t *xdata)
+{
+	struct iatt iatt = { };
+
+	meta_iatt_fill (&iatt, fd->inode, IA_IFREG);
+
+	META_STACK_UNWIND (ftruncate, frame, 0, 0, &iatt, &iatt, xdata);
+	return 0;
+}
+
+static struct meta_ops measure_file_ops = {
+	.file_fill = measure_file_fill,
+	.fops = {
+		.truncate = measure_truncate,
+		.ftruncate = measure_ftruncate,
+		.writev = measure_writev
+	}
+};
+
+
+int
+meta_measure_file_hook (call_frame_t *frame, xlator_t *this, loc_t *loc,
+			dict_t *xdata)
+{
+	meta_ops_set (loc->inode, this, &measure_file_ops);
+
+	return 0;
+}
diff --git a/xlators/meta/src/meminfo-file.c b/xlators/meta/src/meminfo-file.c
new file mode 100644
index 00000000000..807446cfdc4
--- /dev/null
+++ b/xlators/meta/src/meminfo-file.c
@@ -0,0 +1,52 @@
+/*
+   Copyright (c) 2014 Red Hat, Inc. <http://www.redhat.com>
+   This file is part of GlusterFS.
+
+   This file is licensed to you under your choice of the GNU Lesser
+   General Public License, version 3 or any later version (LGPLv3 or
+   later), or the GNU General Public License, version 2 (GPLv2), in all
+   cases as published by the Free Software Foundation.
+*/
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include "xlator.h"
+#include "defaults.h"
+
+#include "meta-mem-types.h"
+#include "meta.h"
+#include "strfd.h"
+#include "statedump.h"
+
+
+static int
+meminfo_file_fill (xlator_t *this, inode_t *file, strfd_t *strfd)
+{
+	xlator_t *xl = NULL;
+
+	xl = meta_ctx_get (file, this);
+
+	gf_proc_dump_xlator_meminfo (xl, strfd);
+
+	return strfd->size;
+}
+
+
+static struct meta_ops meminfo_file_ops = {
+	.file_fill = meminfo_file_fill,
+};
+
+
+int
+meta_meminfo_file_hook (call_frame_t *frame, xlator_t *this, loc_t *loc,
+			dict_t *xdata)
+{
+	meta_ops_set (loc->inode, this, &meminfo_file_ops);
+
+	meta_ctx_set (loc->inode, this, meta_ctx_get (loc->parent, this));
+
+	return 0;
+}
diff --git a/xlators/meta/src/meta-defaults.c b/xlators/meta/src/meta-defaults.c
index f2b637fa28a..905b38554a0 100644
--- a/xlators/meta/src/meta-defaults.c
+++ b/xlators/meta/src/meta-defaults.c
@@ -138,7 +138,7 @@ meta_default_readv (call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size,
 	iov.iov_base = iobuf_ptr (iobuf);
 
 	copy_offset = min (meta_fd->size, offset);
-	copy_size = min (size, meta_fd->size) - copy_offset;
+	copy_size = min (size, (meta_fd->size - copy_offset));
 
 	if (copy_size)
 		memcpy (iov.iov_base, meta_fd->data + copy_offset, copy_size);
diff --git a/xlators/meta/src/meta-hooks.h b/xlators/meta/src/meta-hooks.h
index f8ce3b61e4c..bcf3643d223 100644
--- a/xlators/meta/src/meta-hooks.h
+++ b/xlators/meta/src/meta-hooks.h
@@ -35,5 +35,12 @@ DECLARE_HOOK(options_dir);
 DECLARE_HOOK(option_file);
 DECLARE_HOOK(cmdline_file);
 DECLARE_HOOK(name_file);
+DECLARE_HOOK(private_file);
+DECLARE_HOOK(mallinfo_file);
+DECLARE_HOOK(history_file);
+DECLARE_HOOK(master_dir);
+DECLARE_HOOK(meminfo_file);
+DECLARE_HOOK(measure_file);
+DECLARE_HOOK(profile_file);
 
 #endif
diff --git a/xlators/meta/src/plugins/name-file.c b/xlators/meta/src/name-file.c
index 8ddd42945d7..8ddd42945d7 100644
--- a/xlators/meta/src/plugins/name-file.c
+++ b/xlators/meta/src/name-file.c
diff --git a/xlators/meta/src/plugins/option-file.c b/xlators/meta/src/option-file.c
index 4f9067e1490..4f9067e1490 100644
--- a/xlators/meta/src/plugins/option-file.c
+++ b/xlators/meta/src/option-file.c
diff --git a/xlators/meta/src/plugins/options-dir.c b/xlators/meta/src/options-dir.c
index 229d365a9c7..229d365a9c7 100644
--- a/xlators/meta/src/plugins/options-dir.c
+++ b/xlators/meta/src/options-dir.c
diff --git a/xlators/meta/src/private-file.c b/xlators/meta/src/private-file.c
new file mode 100644
index 00000000000..d2402c08bb4
--- /dev/null
+++ b/xlators/meta/src/private-file.c
@@ -0,0 +1,52 @@
+/*
+   Copyright (c) 2014 Red Hat, Inc. <http://www.redhat.com>
+   This file is part of GlusterFS.
+
+   This file is licensed to you under your choice of the GNU Lesser
+   General Public License, version 3 or any later version (LGPLv3 or
+   later), or the GNU General Public License, version 2 (GPLv2), in all
+   cases as published by the Free Software Foundation.
+*/
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include "xlator.h"
+#include "defaults.h"
+
+#include "meta-mem-types.h"
+#include "meta.h"
+#include "strfd.h"
+#include "statedump.h"
+
+
+static int
+private_file_fill (xlator_t *this, inode_t *file, strfd_t *strfd)
+{
+	xlator_t *xl = NULL;
+
+	xl = meta_ctx_get (file, this);
+
+	gf_proc_dump_xlator_private (xl, strfd);
+
+	return strfd->size;
+}
+
+
+static struct meta_ops private_file_ops = {
+	.file_fill = private_file_fill,
+};
+
+
+int
+meta_private_file_hook (call_frame_t *frame, xlator_t *this, loc_t *loc,
+			dict_t *xdata)
+{
+	meta_ops_set (loc->inode, this, &private_file_ops);
+
+	meta_ctx_set (loc->inode, this, meta_ctx_get (loc->parent, this));
+
+	return 0;
+}
diff --git a/xlators/meta/src/plugins/process_uuid-file.c b/xlators/meta/src/process_uuid-file.c
index c16ceaac150..c16ceaac150 100644
--- a/xlators/meta/src/plugins/process_uuid-file.c
+++ b/xlators/meta/src/process_uuid-file.c
diff --git a/xlators/meta/src/profile-file.c b/xlators/meta/src/profile-file.c
new file mode 100644
index 00000000000..2a25c154699
--- /dev/null
+++ b/xlators/meta/src/profile-file.c
@@ -0,0 +1,52 @@
+/*
+   Copyright (c) 2014 Red Hat, Inc. <http://www.redhat.com>
+   This file is part of GlusterFS.
+
+   This file is licensed to you under your choice of the GNU Lesser
+   General Public License, version 3 or any later version (LGPLv3 or
+   later), or the GNU General Public License, version 2 (GPLv2), in all
+   cases as published by the Free Software Foundation.
+*/
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include "xlator.h"
+#include "defaults.h"
+
+#include "meta-mem-types.h"
+#include "meta.h"
+#include "strfd.h"
+#include "statedump.h"
+
+
+static int
+profile_file_fill (xlator_t *this, inode_t *file, strfd_t *strfd)
+{
+	xlator_t *xl = NULL;
+
+	xl = meta_ctx_get (file, this);
+
+	gf_proc_dump_xlator_profile (xl, strfd);
+
+	return strfd->size;
+}
+
+
+static struct meta_ops profile_file_ops = {
+	.file_fill = profile_file_fill,
+};
+
+
+int
+meta_profile_file_hook (call_frame_t *frame, xlator_t *this, loc_t *loc,
+			dict_t *xdata)
+{
+	meta_ops_set (loc->inode, this, &profile_file_ops);
+
+	meta_ctx_set (loc->inode, this, meta_ctx_get (loc->parent, this));
+
+	return 0;
+}
diff --git a/xlators/meta/src/plugins/root-dir.c b/xlators/meta/src/root-dir.c
index bd6870b21d7..d104d842cf9 100644
--- a/xlators/meta/src/plugins/root-dir.c
+++ b/xlators/meta/src/root-dir.c
@@ -48,6 +48,18 @@ static struct meta_dirent root_dir_dirents[] = {
 	  .type = IA_IFREG,
 	  .hook = meta_cmdline_file_hook,
 	},
+	{ .name = "mallinfo",
+	  .type = IA_IFREG,
+	  .hook = meta_mallinfo_file_hook,
+	},
+	{ .name = "master",
+	  .type = IA_IFDIR,
+	  .hook = meta_master_dir_hook,
+	},
+	{ .name = "measure_latency",
+	  .type = IA_IFREG,
+	  .hook = meta_measure_file_hook,
+	},
 	{ .name = NULL }
 };
 
diff --git a/xlators/meta/src/plugins/subvolume-link.c b/xlators/meta/src/subvolume-link.c
index ca71a751541..ca71a751541 100644
--- a/xlators/meta/src/plugins/subvolume-link.c
+++ b/xlators/meta/src/subvolume-link.c
diff --git a/xlators/meta/src/plugins/subvolumes-dir.c b/xlators/meta/src/subvolumes-dir.c
index f8d0e8039a1..f8d0e8039a1 100644
--- a/xlators/meta/src/plugins/subvolumes-dir.c
+++ b/xlators/meta/src/subvolumes-dir.c
diff --git a/xlators/meta/src/plugins/top-link.c b/xlators/meta/src/top-link.c
index 94b7f7a9f56..94b7f7a9f56 100644
--- a/xlators/meta/src/plugins/top-link.c
+++ b/xlators/meta/src/top-link.c
diff --git a/xlators/meta/src/plugins/type-file.c b/xlators/meta/src/type-file.c
index 1970f4e33e8..1970f4e33e8 100644
--- a/xlators/meta/src/plugins/type-file.c
+++ b/xlators/meta/src/type-file.c
diff --git a/xlators/meta/src/plugins/version-file.c b/xlators/meta/src/version-file.c
index 77f2dea3d66..77f2dea3d66 100644
--- a/xlators/meta/src/plugins/version-file.c
+++ b/xlators/meta/src/version-file.c
diff --git a/xlators/meta/src/plugins/view-dir.c b/xlators/meta/src/view-dir.c
index 6edd455b072..6edd455b072 100644
--- a/xlators/meta/src/plugins/view-dir.c
+++ b/xlators/meta/src/view-dir.c
diff --git a/xlators/meta/src/plugins/volfile-file.c b/xlators/meta/src/volfile-file.c
index 899285763e0..899285763e0 100644
--- a/xlators/meta/src/plugins/volfile-file.c
+++ b/xlators/meta/src/volfile-file.c
diff --git a/xlators/meta/src/plugins/xlator-dir.c b/xlators/meta/src/xlator-dir.c
index 279df385cef..09b7bde62de 100644
--- a/xlators/meta/src/plugins/xlator-dir.c
+++ b/xlators/meta/src/xlator-dir.c
@@ -44,6 +44,22 @@ static struct meta_dirent xlator_dir_dirents[] = {
 	  .type = IA_IFDIR,
 	  .hook = meta_options_dir_hook,
 	},
+	{ .name = "private",
+	  .type = IA_IFREG,
+	  .hook = meta_private_file_hook,
+	},
+	{ .name = "history",
+	  .type = IA_IFREG,
+	  .hook = meta_history_file_hook,
+	},
+	{ .name = "meminfo",
+	  .type = IA_IFREG,
+	  .hook = meta_meminfo_file_hook,
+	},
+	{ .name = "profile",
+	  .type = IA_IFREG,
+	  .hook = meta_profile_file_hook,
+	},
 	{ .name = NULL }
 };
 
@@ -70,3 +86,15 @@ meta_xlator_dir_hook (call_frame_t *frame, xlator_t *this, loc_t *loc,
 
 	return 0;
 }
+
+
+int
+meta_master_dir_hook (call_frame_t *frame, xlator_t *this, loc_t *loc,
+		      dict_t *xdata)
+{
+	meta_ctx_set (loc->inode, this, this->ctx->master);
+
+	meta_ops_set (loc->inode, this, &xlator_dir_ops);
+
+	return 0;
+}