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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Martin Wilck <mwilck@suse.com>
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Date: Thu, 1 Sep 2022 19:21:30 +0200
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Subject: [PATCH] multipath-tools: use /run instead of /dev/shm
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/dev/shm may have unsafe permissions. Use /run instead.
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Use systemd's tmpfiles.d mechanism to create /run/multipath
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early during boot.
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For backward compatibilty, make the runtime directory configurable
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via the "runtimedir" make variable.
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Signed-off-by: Martin Wilck <mwilck@suse.com>
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Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
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---
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.gitignore | 2 ++
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Makefile.inc | 4 +++-
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libmultipath/defaults.h | 2 +-
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multipath/Makefile | 9 +++++++--
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multipath/{multipath.rules => multipath.rules.in} | 4 ++--
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multipath/tmpfiles.conf.in | 1 +
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6 files changed, 16 insertions(+), 6 deletions(-)
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rename multipath/{multipath.rules => multipath.rules.in} (96%)
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create mode 100644 multipath/tmpfiles.conf.in
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diff --git a/.gitignore b/.gitignore
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index 9926756b..f90b0350 100644
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--- a/.gitignore
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+++ b/.gitignore
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@@ -8,6 +8,8 @@
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*.d
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kpartx/kpartx
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multipath/multipath
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+multipath/multipath.rules
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+multipath/tmpfiles.conf
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multipathd/multipathd
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mpathpersist/mpathpersist
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.nfs*
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diff --git a/Makefile.inc b/Makefile.inc
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index d471f045..287f0e7b 100644
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--- a/Makefile.inc
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+++ b/Makefile.inc
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@@ -60,6 +60,7 @@ exec_prefix = $(prefix)
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usr_prefix = $(prefix)
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bindir = $(exec_prefix)/usr/sbin
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libudevdir = $(prefix)/$(SYSTEMDPATH)/udev
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+tmpfilesdir = $(prefix)/$(SYSTEMDPATH)/tmpfiles.d
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udevrulesdir = $(libudevdir)/rules.d
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multipathdir = $(TOPDIR)/libmultipath
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man8dir = $(prefix)/usr/share/man/man8
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@@ -76,6 +77,7 @@ libdmmpdir = $(TOPDIR)/libdmmp
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nvmedir = $(TOPDIR)/libmultipath/nvme
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includedir = $(prefix)/usr/include
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pkgconfdir = $(usrlibdir)/pkgconfig
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+runtimedir = /$(RUN)
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GZIP = gzip -9 -c
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RM = rm -f
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@@ -117,7 +119,7 @@ OPTFLAGS += -Werror -Wextra -Wstrict-prototypes -Wformat=2 \
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-Werror=cast-qual $(ERROR_DISCARDED_QUALIFIERS) \
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--param=ssp-buffer-size=4
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-CFLAGS := $(OPTFLAGS) -DBIN_DIR=\"$(bindir)\" -DLIB_STRING=\"${LIB}\" -DRUN_DIR=\"${RUN}\" \
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+CFLAGS := $(OPTFLAGS) -DBIN_DIR=\"$(bindir)\" -DLIB_STRING=\"${LIB}\" -DRUN_DIR=\"${RUN}\" -DRUNTIME_DIR=\"$(runtimedir)\" \
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-MMD -MP $(CFLAGS)
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BIN_CFLAGS = -fPIE -DPIE
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LIB_CFLAGS = -fPIC
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diff --git a/libmultipath/defaults.h b/libmultipath/defaults.h
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index f1cb000d..dcd9f5a7 100644
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--- a/libmultipath/defaults.h
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+++ b/libmultipath/defaults.h
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@@ -65,7 +65,7 @@
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#define DEFAULT_WWIDS_FILE "/etc/multipath/wwids"
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#define DEFAULT_PRKEYS_FILE "/etc/multipath/prkeys"
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#define DEFAULT_CONFIG_DIR "/etc/multipath/conf.d"
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-#define MULTIPATH_SHM_BASE "/dev/shm/multipath/"
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+#define MULTIPATH_SHM_BASE RUNTIME_DIR "/multipath/"
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static inline char *set_default(char *str)
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diff --git a/multipath/Makefile b/multipath/Makefile
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index e720c7f6..f3d98012 100644
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--- a/multipath/Makefile
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+++ b/multipath/Makefile
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@@ -12,7 +12,7 @@ EXEC = multipath
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OBJS = main.o
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-all: $(EXEC)
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+all: $(EXEC) multipath.rules tmpfiles.conf
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$(EXEC): $(OBJS) $(multipathdir)/libmultipath.so $(mpathcmddir)/libmpathcmd.so
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$(CC) $(CFLAGS) $(OBJS) -o $(EXEC) $(LDFLAGS) $(LIBDEPS)
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@@ -27,6 +27,8 @@ install:
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$(INSTALL_PROGRAM) -d $(DESTDIR)$(udevrulesdir)
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$(INSTALL_PROGRAM) -m 644 11-dm-mpath.rules $(DESTDIR)$(udevrulesdir)
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$(INSTALL_PROGRAM) -m 644 $(EXEC).rules $(DESTDIR)$(libudevdir)/rules.d/62-multipath.rules
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+ $(INSTALL_PROGRAM) -d $(DESTDIR)$(tmpfilesdir)
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+ $(INSTALL_PROGRAM) -m 644 tmpfiles.conf $(DESTDIR)$(tmpfilesdir)/multipath.conf
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$(INSTALL_PROGRAM) -d $(DESTDIR)$(man8dir)
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$(INSTALL_PROGRAM) -m 644 $(EXEC).8.gz $(DESTDIR)$(man8dir)
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$(INSTALL_PROGRAM) -d $(DESTDIR)$(man5dir)
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@@ -43,9 +45,12 @@ uninstall:
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$(RM) $(DESTDIR)$(man8dir)/mpathconf.8.gz
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clean: dep_clean
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- $(RM) core *.o $(EXEC) *.gz
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+ $(RM) core *.o $(EXEC) *.gz multipath.rules tmpfiles.conf
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include $(wildcard $(OBJS:.o=.d))
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dep_clean:
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$(RM) $(OBJS:.o=.d)
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+
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+%: %.in
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+ sed 's,@RUNTIME_DIR@,$(runtimedir),' $< >$@
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diff --git a/multipath/multipath.rules b/multipath/multipath.rules.in
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similarity index 96%
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rename from multipath/multipath.rules
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rename to multipath/multipath.rules.in
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index 68c30644..5c4447a2 100644
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--- a/multipath/multipath.rules
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+++ b/multipath/multipath.rules.in
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@@ -1,8 +1,8 @@
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# Set DM_MULTIPATH_DEVICE_PATH if the device should be handled by multipath
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SUBSYSTEM!="block", GOTO="end_mpath"
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KERNEL!="sd*|dasd*|nvme*", GOTO="end_mpath"
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-ACTION=="remove", TEST=="/dev/shm/multipath/find_multipaths/$major:$minor", \
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- RUN+="/usr/bin/rm -f /dev/shm/multipath/find_multipaths/$major:$minor"
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+ACTION=="remove", TEST=="@RUNTIME_DIR@/multipath/find_multipaths/$major:$minor", \
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+ RUN+="/usr/bin/rm -f @RUNTIME_DIR@/multipath/find_multipaths/$major:$minor"
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ACTION!="add|change", GOTO="end_mpath"
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IMPORT{cmdline}="nompath"
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diff --git a/multipath/tmpfiles.conf.in b/multipath/tmpfiles.conf.in
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new file mode 100644
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index 00000000..21be438a
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--- /dev/null
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+++ b/multipath/tmpfiles.conf.in
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@@ -0,0 +1 @@
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+d @RUNTIME_DIR@/multipath 0700 root root -
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