diff options
4 files changed, 304 insertions, 0 deletions
diff --git a/meta-agl-profile-core/recipes-devtools/rpm/files/0001-Factor-out-and-unify-setting-CLOEXEC.patch b/meta-agl-profile-core/recipes-devtools/rpm/files/0001-Factor-out-and-unify-setting-CLOEXEC.patch new file mode 100644 index 000000000..cfddec6da --- /dev/null +++ b/meta-agl-profile-core/recipes-devtools/rpm/files/0001-Factor-out-and-unify-setting-CLOEXEC.patch @@ -0,0 +1,140 @@ +From 0a66176074560303bf0870957464239e9757d891 Mon Sep 17 00:00:00 2001 +From: Kir Kolyshkin <kolyshkin@gmail.com> +Date: Tue, 29 May 2018 17:37:05 -0700 +Subject: [PATCH 1/3] Factor out and unify setting CLOEXEC + +Commit 7a7c31f5 ("Set FD_CLOEXEC on opened files before exec from +lua script is called") copied the code that sets CLOEXEC flag on all +possible file descriptors from lib/rpmscript.c to luaext/lposix.c, +essentially creating two copies of the same code (modulo comments +and the unused assignment). + +This commit moves the functionality into its own function, without +any code modifications, using the version from luaext/lposix.c. + +Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com> +(cherry picked from commit 9c3e5de3240554c8ea1b29d52eeadee4840fefac) +--- + lib/rpmscript.c | 17 ++--------------- + luaext/lposix.c | 13 ++----------- + rpmio/rpmio.c | 14 ++++++++++++++ + rpmio/rpmio_internal.h | 6 ++++++ + 4 files changed, 24 insertions(+), 26 deletions(-) + +diff --git a/lib/rpmscript.c b/lib/rpmscript.c +index 98d3f42..61dff83 100644 +--- a/lib/rpmscript.c ++++ b/lib/rpmscript.c +@@ -18,6 +18,7 @@ + + #include "rpmio/rpmlua.h" + #include "lib/rpmscript.h" ++#include "rpmio/rpmio_internal.h" + + #include "lib/rpmplugins.h" /* rpm plugins hooks */ + +@@ -161,25 +162,11 @@ static const char * const SCRIPT_PATH = "PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr + static void doScriptExec(ARGV_const_t argv, ARGV_const_t prefixes, + FD_t scriptFd, FD_t out) + { +- int flag; +- int fdno; + int xx; +- int open_max; + + (void) signal(SIGPIPE, SIG_DFL); + +- /* XXX Force FD_CLOEXEC on all inherited fdno's. */ +- open_max = sysconf(_SC_OPEN_MAX); +- if (open_max == -1) { +- open_max = 1024; +- } +- for (fdno = 3; fdno < open_max; fdno++) { +- flag = fcntl(fdno, F_GETFD); +- if (flag == -1 || (flag & FD_CLOEXEC)) +- continue; +- xx = fcntl(fdno, F_SETFD, FD_CLOEXEC); +- /* XXX W2DO? debug msg for inheirited fdno w/o FD_CLOEXEC */ +- } ++ rpmSetCloseOnExec(); + + if (scriptFd != NULL) { + int sfdno = Fileno(scriptFd); +diff --git a/luaext/lposix.c b/luaext/lposix.c +index 0a7c26c..5d7ad3c 100644 +--- a/luaext/lposix.c ++++ b/luaext/lposix.c +@@ -27,6 +27,7 @@ + #include <unistd.h> + #include <utime.h> + #include <rpm/rpmutil.h> ++#include "rpmio/rpmio_internal.h" + + #define MYNAME "posix" + #define MYVERSION MYNAME " library for " LUA_VERSION " / Nov 2003" +@@ -335,21 +336,11 @@ static int Pexec(lua_State *L) /** exec(path,[args]) */ + const char *path = luaL_checkstring(L, 1); + int i,n=lua_gettop(L); + char **argv; +- int flag, fdno, open_max; + + if (!have_forked) + return luaL_error(L, "exec not permitted in this context"); + +- open_max = sysconf(_SC_OPEN_MAX); +- if (open_max == -1) { +- open_max = 1024; +- } +- for (fdno = 3; fdno < open_max; fdno++) { +- flag = fcntl(fdno, F_GETFD); +- if (flag == -1 || (flag & FD_CLOEXEC)) +- continue; +- fcntl(fdno, F_SETFD, FD_CLOEXEC); +- } ++ rpmSetCloseOnExec(); + + argv = malloc((n+1)*sizeof(char*)); + if (argv==NULL) return luaL_error(L,"not enough memory"); +diff --git a/rpmio/rpmio.c b/rpmio/rpmio.c +index 0b90984..747bf3c 100644 +--- a/rpmio/rpmio.c ++++ b/rpmio/rpmio.c +@@ -1477,4 +1477,18 @@ void fdFiniDigest(FD_t fd, int hashalgo, + } + } + ++void rpmSetCloseOnExec(void) ++{ ++ int flag, fdno, open_max; + ++ open_max = sysconf(_SC_OPEN_MAX); ++ if (open_max == -1) { ++ open_max = 1024; ++ } ++ for (fdno = 3; fdno < open_max; fdno++) { ++ flag = fcntl(fdno, F_GETFD); ++ if (flag == -1 || (flag & FD_CLOEXEC)) ++ continue; ++ fcntl(fdno, F_SETFD, FD_CLOEXEC); ++ } ++} +diff --git a/rpmio/rpmio_internal.h b/rpmio/rpmio_internal.h +index 8c9f1a8..da39250 100644 +--- a/rpmio/rpmio_internal.h ++++ b/rpmio/rpmio_internal.h +@@ -37,6 +37,12 @@ void fdFiniDigest(FD_t fd, int hashalgo, + int rpmioSlurp(const char * fn, + uint8_t ** bp, ssize_t * blenp); + ++/** ++ * Set close-on-exec flag for all opened file descriptors, except ++ * stdin/stdout/stderr. ++ */ ++void rpmSetCloseOnExec(void); ++ + #ifdef __cplusplus + } + #endif +-- +2.7.4 + diff --git a/meta-agl-profile-core/recipes-devtools/rpm/files/0002-Optimize-rpmSetCloseOnExec.patch b/meta-agl-profile-core/recipes-devtools/rpm/files/0002-Optimize-rpmSetCloseOnExec.patch new file mode 100644 index 000000000..9354dd6e0 --- /dev/null +++ b/meta-agl-profile-core/recipes-devtools/rpm/files/0002-Optimize-rpmSetCloseOnExec.patch @@ -0,0 +1,102 @@ +From 6f56aa01a357bbcf9401d79a378ae380f5f939d4 Mon Sep 17 00:00:00 2001 +From: Kir Kolyshkin <kolyshkin@gmail.com> +Date: Tue, 29 May 2018 17:52:56 -0700 +Subject: [PATCH 2/3] Optimize rpmSetCloseOnExec + +In case maximum number of open files limit is set too high, both +luaext/Pexec() and lib/doScriptExec() spend way too much time +trying to set FD_CLOEXEC flag for all those file descriptors, +resulting in severe increase of time it takes to execute say +rpm or dnf. + +This becomes increasingly noticeable when running with e.g. under +Docker, the reason being: + +> $ docker run fedora ulimit -n +> 1048576 + +One obvious fix is to use procfs to get the actual list of opened fds +and iterate over it. My quick-n-dirty benchmark shows the /proc approach +is about 10x faster than iterating through a list of just 1024 fds, +so it's an improvement even for default ulimit values. + +Note that the old method is still used in case /proc is not available. + +While at it, + + 1. fix the function by making sure we modify (rather than set) + the existing flags. As the only known flag is FD_CLOEXEC, + this change is currently purely aesthetical, but in case + other flags will appear it will become a real bug fix. + + 2. get rid of magic number 3; use STDERR_FILENO + +Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com> + +Fixes #444 + +(cherry picked from commit 5e6f05cd8dad6c1ee6bd1e6e43f176976c9c3416) +--- + rpmio/rpmio.c | 43 ++++++++++++++++++++++++++++++++++--------- + 1 file changed, 34 insertions(+), 9 deletions(-) + +diff --git a/rpmio/rpmio.c b/rpmio/rpmio.c +index 747bf3c..8148aa2 100644 +--- a/rpmio/rpmio.c ++++ b/rpmio/rpmio.c +@@ -1477,18 +1477,43 @@ void fdFiniDigest(FD_t fd, int hashalgo, + } + } + ++static void set_cloexec(int fd) ++{ ++ int flags = fcntl(fd, F_GETFD); ++ ++ if (flags == -1 || (flags & FD_CLOEXEC)) ++ return; ++ ++ fcntl(fd, F_SETFD, flags | FD_CLOEXEC); ++} ++ + void rpmSetCloseOnExec(void) + { +- int flag, fdno, open_max; ++ const int min_fd = STDERR_FILENO; /* don't touch stdin/out/err */ ++ int fd; ++ ++ DIR *dir = opendir("/proc/self/fd"); ++ if (dir == NULL) { /* /proc not available */ ++ /* iterate over all possible fds, might be slow */ ++ int open_max = sysconf(_SC_OPEN_MAX); ++ if (open_max == -1) ++ open_max = 1024; + +- open_max = sysconf(_SC_OPEN_MAX); +- if (open_max == -1) { +- open_max = 1024; ++ for (fd = min_fd + 1; fd < open_max; fd++) ++ set_cloexec(fd); ++ ++ return; + } +- for (fdno = 3; fdno < open_max; fdno++) { +- flag = fcntl(fdno, F_GETFD); +- if (flag == -1 || (flag & FD_CLOEXEC)) +- continue; +- fcntl(fdno, F_SETFD, FD_CLOEXEC); ++ ++ /* iterate over fds obtained from /proc */ ++ struct dirent *entry; ++ while ((entry = readdir(dir)) != NULL) { ++ fd = atoi(entry->d_name); ++ if (fd > min_fd) ++ set_cloexec(fd); + } ++ ++ closedir(dir); ++ ++ return; + } +-- +2.7.4 + diff --git a/meta-agl-profile-core/recipes-devtools/rpm/files/0003-rpmSetCloseOnExec-use-getrlimit.patch b/meta-agl-profile-core/recipes-devtools/rpm/files/0003-rpmSetCloseOnExec-use-getrlimit.patch new file mode 100644 index 000000000..d9b813ece --- /dev/null +++ b/meta-agl-profile-core/recipes-devtools/rpm/files/0003-rpmSetCloseOnExec-use-getrlimit.patch @@ -0,0 +1,55 @@ +From 1f5438d677dca330642158ec0b1c0366c6a65725 Mon Sep 17 00:00:00 2001 +From: Kir Kolyshkin <kolyshkin@gmail.com> +Date: Tue, 29 May 2018 18:09:27 -0700 +Subject: [PATCH 3/3] rpmSetCloseOnExec: use getrlimit() + +In case /proc is not available to get the actual list of opened fds, +we fall back to iterating through the list of all possible fds. + +It is possible that during the course of the program execution the limit +on number of open file descriptors might be lowered, so using the +current limit, as returned by sysconf(_SC_OPEN_MAX), might omit some +fds. Therefore, it is better to use rlim_max from the structure +filled in by gertlimit(RLIMIT_NOFILE) to make sure we're checking +all fds. + +This slows down the function, but only in the case /proc is not +available, which should be rare in practice. + +Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com> +(cherry picked from commit 307e28b4cb08b05bc044482058eeebc9f59bb9a9) +--- + rpmio/rpmio.c | 10 +++++++++- + 1 file changed, 9 insertions(+), 1 deletion(-) + +diff --git a/rpmio/rpmio.c b/rpmio/rpmio.c +index 8148aa2..0698e53 100644 +--- a/rpmio/rpmio.c ++++ b/rpmio/rpmio.c +@@ -10,6 +10,7 @@ + #include <sys/personality.h> + #endif + #include <sys/utsname.h> ++#include <sys/resource.h> + + #include <rpm/rpmlog.h> + #include <rpm/rpmmacro.h> +@@ -1495,7 +1496,14 @@ void rpmSetCloseOnExec(void) + DIR *dir = opendir("/proc/self/fd"); + if (dir == NULL) { /* /proc not available */ + /* iterate over all possible fds, might be slow */ +- int open_max = sysconf(_SC_OPEN_MAX); ++ struct rlimit rl; ++ int open_max; ++ ++ if (getrlimit(RLIMIT_NOFILE, &rl) == 0 && rl.rlim_max != RLIM_INFINITY) ++ open_max = rl.rlim_max; ++ else ++ open_max = sysconf(_SC_OPEN_MAX); ++ + if (open_max == -1) + open_max = 1024; + +-- +2.7.4 + diff --git a/meta-agl-profile-core/recipes-devtools/rpm/rpm_%.bbappend b/meta-agl-profile-core/recipes-devtools/rpm/rpm_%.bbappend new file mode 100644 index 000000000..1333a97c0 --- /dev/null +++ b/meta-agl-profile-core/recipes-devtools/rpm/rpm_%.bbappend @@ -0,0 +1,7 @@ +FILESEXTRAPATHS_append := ":${THISDIR}/files" + +SRC_URI_append = "\ + file://0001-Factor-out-and-unify-setting-CLOEXEC.patch \ + file://0002-Optimize-rpmSetCloseOnExec.patch \ + file://0003-rpmSetCloseOnExec-use-getrlimit.patch \ +" |