Blame SOURCES/0072-libmount-cleanup-fs-root-detection-code.patch

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From bb3483bf21b9cbe462caaa74fbc03d2eb7845d74 Mon Sep 17 00:00:00 2001
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From: Karel Zak <kzak@redhat.com>
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Date: Tue, 10 Mar 2015 13:35:56 +0100
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Subject: [PATCH 72/84] libmount: cleanup fs root detection code
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Upstream: http://github.com/karelzak/util-linux/commit/cc06a01ec551ed2bcd397a5097165b4434179b34
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Addresses: https://bugzilla.redhat.com/show_bug.cgi?id=587393
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Signed-off-by: Karel Zak <kzak@redhat.com>
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---
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 libmount/src/tab.c                            | 32 ++++++++++++++++++++-----
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 libmount/src/utils.c                          | 34 ---------------------------
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 tests/expected/libmount/utils-fs-root         |  1 -
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 tests/expected/libmount/utils-fs-root-subdir  |  1 -
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 tests/expected/libmount/utils-fs-root-subdir2 |  1 -
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 tests/ts/libmount/utils                       | 12 ----------
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 6 files changed, 26 insertions(+), 55 deletions(-)
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 delete mode 100644 tests/expected/libmount/utils-fs-root
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 delete mode 100644 tests/expected/libmount/utils-fs-root-subdir
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 delete mode 100644 tests/expected/libmount/utils-fs-root-subdir2
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diff --git a/libmount/src/tab.c b/libmount/src/tab.c
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index 1ba1eec..10ee7ce 100644
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--- a/libmount/src/tab.c
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+++ b/libmount/src/tab.c
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@@ -46,6 +46,8 @@
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 #include "mountP.h"
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 #include "strutils.h"
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 #include "loopdev.h"
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+#include "fileutils.h"
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+#include "canonicalize.h"
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 static int is_mountinfo(struct libmnt_table *tb);
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@@ -900,6 +902,20 @@ struct libmnt_fs *mnt_table_find_devno(struct libmnt_table *tb,
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 	return NULL;
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 }
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+static char *remove_mountpoint_from_path(const char *path, const char *mnt)
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+{
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+        char *res;
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+	const char *p;
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+	size_t sz;
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+
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+	sz = strlen(mnt);
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+	p = sz > 1 ? path + sz : path;
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+
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+	res = *p ? strdup(p) : strdup("/");
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+	DBG(UTILS, mnt_debug("%s fs-root is %s", path, res));
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+	return res;
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+}
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+
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 /*
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  * tb: /proc/self/mountinfo
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  * fs: filesystem
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@@ -919,7 +935,8 @@ struct libmnt_fs *mnt_table_get_fs_root(struct libmnt_table *tb,
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 					unsigned long mountflags,
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 					char **fsroot)
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 {
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-	char *root = NULL, *mnt = NULL;
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+	char *root = NULL;
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+	const char *mnt = NULL;
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 	const char *fstype;
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 	struct libmnt_fs *src_fs = NULL;
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@@ -937,10 +954,15 @@ struct libmnt_fs *mnt_table_get_fs_root(struct libmnt_table *tb,
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 		DBG(TAB, mnt_debug("fs-root for bind"));
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 		src = xsrc = mnt_resolve_spec(mnt_fs_get_source(fs), tb->cache);
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-		if (src)
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-			mnt = mnt_get_mountpoint(src);
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+		if (src) {
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+			struct libmnt_fs *fs = mnt_table_find_mountpoint(tb,
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+							src, MNT_ITER_BACKWARD);
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+			if (fs)
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+				mnt = mnt_fs_get_target(fs);
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+		}
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+
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 		if (mnt)
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-			root = mnt_get_fs_root(src, mnt);
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+			root = remove_mountpoint_from_path(src, mnt);
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 		if (xsrc && !tb->cache) {
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 			free(xsrc);
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@@ -1007,11 +1029,9 @@ dflt:
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 	DBG(TAB, mnt_debug("FS root result: %s", root));
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-	free(mnt);
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 	return src_fs;
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 err:
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 	free(root);
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-	free(mnt);
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 	return NULL;
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 }
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diff --git a/libmount/src/utils.c b/libmount/src/utils.c
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index 5783d88..2151ff9 100644
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--- a/libmount/src/utils.c
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+++ b/libmount/src/utils.c
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@@ -908,28 +908,6 @@ err:
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 	return NULL;
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 }
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-char *mnt_get_fs_root(const char *path, const char *mnt)
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-{
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-	char *m = (char *) mnt, *res;
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-	const char *p;
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-	size_t sz;
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-
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-	if (!m)
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-		m = mnt_get_mountpoint(path);
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-	if (!m)
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-		return NULL;
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-
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-	sz = strlen(m);
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-	p = sz > 1 ? path + sz : path;
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-
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-	if (m != mnt)
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-		free(m);
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-
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-	res = *p ? strdup(p) : strdup("/");
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-	DBG(UTILS, mnt_debug("%s fs-root is %s", path, res));
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-	return res;
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-}
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-
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 /*
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  * Search for @name kernel command parametr.
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  *
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@@ -1085,17 +1063,6 @@ int test_mountpoint(struct libmnt_test *ts, int argc, char *argv[])
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 	return 0;
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 }
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-int test_fsroot(struct libmnt_test *ts, int argc, char *argv[])
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-{
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-	char *path = canonicalize_path(argv[1]),
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-	     *mnt = path ? mnt_get_fs_root(path, NULL) : NULL;
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-
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-	printf("%s: %s\n", argv[1], mnt ? : "unknown");
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-	free(mnt);
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-	free(path);
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-	return 0;
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-}
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-
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 int test_filesystems(struct libmnt_test *ts, int argc, char *argv[])
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 {
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 	char **filesystems = NULL;
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@@ -1170,7 +1137,6 @@ int main(int argc, char *argv[])
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 	{ "--starts-with",   test_startswith,      "<string> <prefix>" },
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 	{ "--ends-with",     test_endswith,        "<string> <prefix>" },
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 	{ "--mountpoint",    test_mountpoint,      "<path>" },
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-	{ "--fs-root",       test_fsroot,          "<path>" },
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 	{ "--cd-parent",     test_chdir,           "<path>" },
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 	{ "--kernel-cmdline",test_kernel_cmdline,  "<option> | <option>=" },
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 	{ "--mkdir",         test_mkdir,           "<path>" },
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diff --git a/tests/expected/libmount/utils-fs-root b/tests/expected/libmount/utils-fs-root
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deleted file mode 100644
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index 7746b28..0000000
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--- a/tests/expected/libmount/utils-fs-root
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+++ /dev/null
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@@ -1 +0,0 @@
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-/proc: /
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diff --git a/tests/expected/libmount/utils-fs-root-subdir b/tests/expected/libmount/utils-fs-root-subdir
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deleted file mode 100644
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index 09cdb8d..0000000
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--- a/tests/expected/libmount/utils-fs-root-subdir
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+++ /dev/null
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@@ -1 +0,0 @@
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-/proc/sys/kernel: /sys/kernel
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diff --git a/tests/expected/libmount/utils-fs-root-subdir2 b/tests/expected/libmount/utils-fs-root-subdir2
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deleted file mode 100644
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index 2e8b89a..0000000
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--- a/tests/expected/libmount/utils-fs-root-subdir2
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+++ /dev/null
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@@ -1 +0,0 @@
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-/etc: /etc
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diff --git a/tests/ts/libmount/utils b/tests/ts/libmount/utils
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index 6facaad..89ecf10 100755
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--- a/tests/ts/libmount/utils
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+++ b/tests/ts/libmount/utils
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@@ -64,18 +64,6 @@ ts_init_subtest "mountpoint-root"
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 ts_valgrind $TESTPROG --mountpoint / &> $TS_OUTPUT
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 ts_finalize_subtest
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-ts_init_subtest "fs-root"
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-ts_valgrind $TESTPROG --fs-root /proc &> $TS_OUTPUT
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-ts_finalize_subtest
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-
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-ts_init_subtest "fs-root-subdir"
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-ts_valgrind $TESTPROG --fs-root /proc/sys/kernel &> $TS_OUTPUT
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-ts_finalize_subtest
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-
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-ts_init_subtest "fs-root-subdir2"
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-ts_valgrind $TESTPROG --fs-root /etc &> $TS_OUTPUT
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-ts_finalize_subtest
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-
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 ts_init_subtest "kernel-cmdline"
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 export LIBMOUNT_KERNEL_CMDLINE="$TS_SELF/files/kernel_cmdline"
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 ts_valgrind $TESTPROG --kernel-cmdline selinux= &>> $TS_OUTPUT
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-- 
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2.7.4
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