device-mapper-persistent-data/SOURCES/dmpd-thin_repair-cache_repa...

299 lines
11 KiB
Diff

base/file_utils.cc | 4 ++--
base/file_utils.h | 2 +-
caching/cache_repair.cc | 8 +++++++-
functional-tests/cache-functional-tests.scm | 32 ++++++++++++++++++++++++++---
functional-tests/era-functional-tests.scm | 4 ++--
functional-tests/functional-tests.scm | 4 ++--
functional-tests/thin-functional-tests.scm | 27 ++++++++++++++++++++++--
thin-provisioning/thin_repair.cc | 8 +++++++-
8 files changed, 75 insertions(+), 14 deletions(-)
diff --git a/base/file_utils.cc b/base/file_utils.cc
index ba8957c..7883cfe 100644
--- a/base/file_utils.cc
+++ b/base/file_utils.cc
@@ -66,13 +66,13 @@ file_utils::file_exists(string const &path) {
}
void
-file_utils::check_file_exists(string const &file) {
+file_utils::check_file_exists(string const &file, bool must_be_regular_file) {
struct stat info;
int r = ::stat(file.c_str(), &info);
if (r)
throw runtime_error("Couldn't stat file");
- if (!S_ISREG(info.st_mode))
+ if (must_be_regular_file && !S_ISREG(info.st_mode))
throw runtime_error("Not a regular file");
}
diff --git a/base/file_utils.h b/base/file_utils.h
index 2ee20ab..3edcc9e 100644
--- a/base/file_utils.h
+++ b/base/file_utils.h
@@ -10,7 +10,7 @@
namespace file_utils {
int open_file(std::string const &path, int flags);
bool file_exists(std::string const &path);
- void check_file_exists(std::string const &file);
+ void check_file_exists(std::string const &file, bool must_be_regular_file = true);
int create_block_file(std::string const &path, off_t file_size);
int open_block_file(std::string const &path, off_t min_size, bool writeable, bool excl = true);
uint64_t get_file_length(std::string const &file);
diff --git a/caching/cache_repair.cc b/caching/cache_repair.cc
index 9587d5f..8a837a8 100644
--- a/caching/cache_repair.cc
+++ b/caching/cache_repair.cc
@@ -2,6 +2,7 @@
#include <getopt.h>
#include <libgen.h>
+#include "base/file_utils.h"
#include "base/output_file_requirements.h"
#include "caching/commands.h"
#include "caching/metadata.h"
@@ -29,12 +30,17 @@ namespace {
}
int repair(string const &old_path, string const &new_path) {
+ bool metadata_touched = false;
try {
+ file_utils::check_file_exists(new_path, false);
+ metadata_touched = true;
metadata_dump(open_metadata_for_read(old_path),
output_emitter(new_path),
true);
} catch (std::exception &e) {
+ if (metadata_touched)
+ file_utils::zero_superblock(new_path);
cerr << e.what() << endl;
return 1;
}
@@ -110,7 +116,7 @@ cache_repair_cmd::run(int argc, char **argv)
check_output_file_requirements(*output_path);
else {
- cerr << "no output file provided" << endl;
+ cerr << "No output file provided." << endl;
usage(cerr);
return 1;
}
diff --git a/functional-tests/cache-functional-tests.scm b/functional-tests/cache-functional-tests.scm
index 0e70b94..9b3a203 100644
--- a/functional-tests/cache-functional-tests.scm
+++ b/functional-tests/cache-functional-tests.scm
@@ -15,6 +15,7 @@
(define-tool cache-dump)
(define-tool cache-restore)
(define-tool cache-metadata-size)
+ (define-tool cache-repair)
(define-syntax with-cache-xml
(syntax-rules ()
@@ -35,7 +36,8 @@
(syntax-rules ()
((_ (md) b1 b2 ...)
(with-temp-file-sized ((md "cache.bin" (to-bytes (meg 4))))
- b1 b2 ...))))
+ (system (fmt #f "dd if=/usr/bin/ls of=" md " bs=4096 > /dev/null 2>&1"))
+ b1 b2 ...))))
(define-syntax with-empty-metadata
(syntax-rules ()
@@ -180,7 +182,7 @@
"the input file can't be found"
(with-empty-metadata (md)
(run-fail-rcv (_ stderr) (cache-restore "-i no-such-file -o" md)
- (assert-superblock-untouched md)
+ (assert-superblock-all-zeroes md)
(assert-starts-with "Couldn't stat file" stderr))))
(define-scenario (cache-restore garbage-input-file)
@@ -188,7 +190,7 @@
(with-empty-metadata (md)
(with-temp-file-sized ((xml "cache.xml" 4096))
(run-fail-rcv (_ stderr) (cache-restore "-i" xml "-o" md)
- (assert-superblock-untouched md)))))
+ (assert-superblock-all-zeroes md)))))
(define-scenario (cache-restore missing-output-file)
"the output file can't be found"
@@ -354,4 +356,28 @@
(run-ok-rcv (stdout stderr) (cache-metadata-size "--nr-blocks 67108864")
(assert-equal "3678208 sectors" stdout)
(assert-eof stderr)))
+
+ ;;;-----------------------------------------------------------
+ ;;; cache_repair scenarios
+ ;;;-----------------------------------------------------------
+ (define-scenario (cache-repair missing-input-file)
+ "the input file can't be found"
+ (with-empty-metadata (md)
+ (run-fail-rcv (_ stderr) (cache-repair "-i no-such-file -o" md)
+ (assert-superblock-all-zeroes md)
+ (assert-starts-with "Couldn't stat path" stderr))))
+
+ (define-scenario (cache-repair garbage-input-file)
+ "the input file is just zeroes"
+ (with-empty-metadata (md1)
+ (with-corrupt-metadata (md2)
+ (run-fail-rcv (_ stderr) (cache-repair "-i" md1 "-o" md2)
+ (assert-superblock-all-zeroes md2)))))
+
+ (define-scenario (cache-repair missing-output-file)
+ "the output file can't be found"
+ (with-cache-xml (xml)
+ (run-fail-rcv (_ stderr) (cache-repair "-i" xml)
+ (assert-starts-with "No output file provided." stderr))))
+
)
diff --git a/functional-tests/era-functional-tests.scm b/functional-tests/era-functional-tests.scm
index 373fe34..890f0ff 100644
--- a/functional-tests/era-functional-tests.scm
+++ b/functional-tests/era-functional-tests.scm
@@ -153,7 +153,7 @@
"the input file can't be found"
(with-empty-metadata (md)
(run-fail-rcv (_ stderr) (era-restore "-i no-such-file -o" md)
- (assert-superblock-untouched md)
+ (assert-superblock-all-zeroes md)
(assert-starts-with "Couldn't stat file" stderr))))
(define-scenario (era-restore garbage-input-file)
@@ -161,7 +161,7 @@
(with-empty-metadata (md)
(with-temp-file-sized ((xml "era.xml" 4096))
(run-fail-rcv (_ stderr) (era-restore "-i " xml "-o" md)
- (assert-superblock-untouched md)))))
+ (assert-superblock-all-zeroes md)))))
(define-scenario (era-restore output-unspecified)
"Fails if no metadata dev specified"
diff --git a/functional-tests/functional-tests.scm b/functional-tests/functional-tests.scm
index aa5b95c..758498e 100644
--- a/functional-tests/functional-tests.scm
+++ b/functional-tests/functional-tests.scm
@@ -21,7 +21,7 @@
assert-eof
assert-starts-with
assert-matches
- assert-superblock-untouched
+ assert-superblock-all-zeroes
assert-member?
assert-raises-thunk
assert-raises
@@ -259,7 +259,7 @@
(loop (+ i 1))
#f)))))
- (define (assert-superblock-untouched md)
+ (define (assert-superblock-all-zeroes md)
(with-bcache (cache md 1)
(with-block (b cache 0 (get-flags))
(unless (all-zeroes? (block-data b) 4096)
diff --git a/functional-tests/thin-functional-tests.scm b/functional-tests/thin-functional-tests.scm
index d096b78..6bb7d24 100644
--- a/functional-tests/thin-functional-tests.scm
+++ b/functional-tests/thin-functional-tests.scm
@@ -37,10 +37,12 @@
b1 b2 ...)))))
;;; It would be nice if the metadata was at least similar to valid data.
+ ;;; Here I'm just using the start of the ls binary as 'random' data.
(define-syntax with-corrupt-metadata
(syntax-rules ()
((_ (md) b1 b2 ...)
(with-temp-file-sized ((md "thin.bin" (meg 4)))
+ (system (fmt #f "dd if=/usr/bin/ls of=" md " bs=4096 > /dev/null 2>&1"))
b1 b2 ...))))
(define-syntax with-empty-metadata
@@ -167,7 +169,7 @@
"the input file can't be found"
(with-empty-metadata (md)
(run-fail-rcv (_ stderr) (thin-restore "-i no-such-file -o" md)
- (assert-superblock-untouched md)
+ (assert-superblock-all-zeroes md)
(assert-starts-with "Couldn't stat file" stderr))))
(define-scenario (thin-restore garbage-input-file)
@@ -175,7 +177,7 @@
(with-empty-metadata (md)
(with-temp-file-sized ((xml "thin.xml" 4096))
(run-fail-rcv (_ stderr) (thin-restore "-i " xml "-o" md)
- (assert-superblock-untouched md)))))
+ (assert-superblock-all-zeroes md)))))
(define-scenario (thin-restore missing-output-file)
"the output file can't be found"
@@ -333,4 +335,25 @@
(with-empty-metadata (md)
(run-fail-rcv (_ stderr) (thin-repair "-i" xml "-o" md)
#t))))
+
+ (define-scenario (thin-repair missing-input-file)
+ "the input file can't be found"
+ (with-empty-metadata (md)
+ (run-fail-rcv (_ stderr) (thin-repair "-i no-such-file -o" md)
+ (assert-superblock-all-zeroes md)
+ (assert-starts-with "Couldn't stat file" stderr))))
+
+ (define-scenario (thin-repair garbage-input-file)
+ "the input file is just zeroes"
+ (with-empty-metadata (md1)
+ (with-corrupt-metadata (md2)
+ (run-fail-rcv (_ stderr) (thin-repair "-i " md1 "-o" md2)
+ (assert-superblock-all-zeroes md2)))))
+
+ (define-scenario (thin-repair missing-output-file)
+ "the output file can't be found"
+ (with-thin-xml (xml)
+ (run-fail-rcv (_ stderr) (thin-repair "-i " xml)
+ (assert-starts-with "No output file provided." stderr))))
+
)
diff --git a/thin-provisioning/thin_repair.cc b/thin-provisioning/thin_repair.cc
index e22b193..0673753 100644
--- a/thin-provisioning/thin_repair.cc
+++ b/thin-provisioning/thin_repair.cc
@@ -2,6 +2,7 @@
#include <getopt.h>
#include <libgen.h>
+#include "base/file_utils.h"
#include "base/output_file_requirements.h"
#include "persistent-data/file_utils.h"
#include "thin-provisioning/commands.h"
@@ -17,15 +18,20 @@ using namespace thin_provisioning;
namespace {
int repair(string const &old_path, string const &new_path) {
+ bool metadata_touched = false;
try {
// block size gets updated by the restorer
block_manager<>::ptr new_bm = open_bm(new_path, block_manager<>::READ_WRITE);
+ file_utils::check_file_exists(old_path, false);
+ metadata_touched = true;
metadata::ptr new_md(new metadata(new_bm, metadata::CREATE, 128, 0));
emitter::ptr e = create_restore_emitter(new_md);
block_manager<>::ptr old_bm = open_bm(old_path, block_manager<>::READ_ONLY);
metadata_repair(old_bm, e);
} catch (std::exception &e) {
+ if (metadata_touched)
+ file_utils::zero_superblock(new_path);
cerr << e.what() << endl;
return 1;
}
@@ -101,7 +107,7 @@ thin_repair_cmd::run(int argc, char **argv)
check_output_file_requirements(*output_path);
else {
- cerr << "no output file provided" << endl;
+ cerr << "No output file provided." << endl;
usage(cerr);
return 1;
}