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authorTao Bao <tbao@google.com>2017-03-26 22:36:49 +0200
committerTao Bao <tbao@google.com>2017-03-31 09:04:56 +0200
commit8f23757ad42352f57db0b2ab9fc8b6e92eeaedd9 (patch)
treef94a9b955c8a64f112db44dbcc96f2fd6c2d2d6e /updater/blockimg.cpp
parentMerge "updater: Move RangeSinkWrite into RangeSinkState." (diff)
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Diffstat (limited to '')
-rw-r--r--updater/blockimg.cpp128
1 files changed, 18 insertions, 110 deletions
diff --git a/updater/blockimg.cpp b/updater/blockimg.cpp
index a1a5773d4..fc7a561eb 100644
--- a/updater/blockimg.cpp
+++ b/updater/blockimg.cpp
@@ -50,9 +50,10 @@
#include "edify/expr.h"
#include "error_code.h"
-#include "updater/install.h"
#include "ota_io.h"
#include "print_sha1.h"
+#include "updater/install.h"
+#include "updater/rangeset.h"
#include "updater/updater.h"
// Set this to 0 to interpret 'erase' transfers to mean do a
@@ -65,100 +66,10 @@ static constexpr const char* STASH_DIRECTORY_BASE = "/cache/recovery";
static constexpr mode_t STASH_DIRECTORY_MODE = 0700;
static constexpr mode_t STASH_FILE_MODE = 0600;
-struct RangeSet {
- size_t count; // Limit is INT_MAX.
- size_t size;
- std::vector<size_t> pos; // Actual limit is INT_MAX.
-
- // Get the block number for the ith(starting from 0) block in the range set.
- int get_block(size_t idx) const {
- if (idx >= size) {
- LOG(ERROR) << "index: " << idx << " is greater than range set size: " << size;
- return -1;
- }
- for (size_t i = 0; i < pos.size(); i += 2) {
- if (idx < pos[i + 1] - pos[i]) {
- return pos[i] + idx;
- }
- idx -= (pos[i + 1] - pos[i]);
- }
- return -1;
- }
-};
-
static CauseCode failure_type = kNoCause;
static bool is_retry = false;
static std::unordered_map<std::string, RangeSet> stash_map;
-static RangeSet parse_range(const std::string& range_text) {
- RangeSet rs;
-
- std::vector<std::string> pieces = android::base::Split(range_text, ",");
- if (pieces.size() < 3) {
- goto err;
- }
-
- size_t num;
- if (!android::base::ParseUint(pieces[0], &num, static_cast<size_t>(INT_MAX))) {
- goto err;
- }
-
- if (num == 0 || num % 2) {
- goto err; // must be even
- } else if (num != pieces.size() - 1) {
- goto err;
- }
-
- rs.pos.resize(num);
- rs.count = num / 2;
- rs.size = 0;
-
- for (size_t i = 0; i < num; i += 2) {
- if (!android::base::ParseUint(pieces[i + 1], &rs.pos[i], static_cast<size_t>(INT_MAX))) {
- goto err;
- }
-
- if (!android::base::ParseUint(pieces[i + 2], &rs.pos[i + 1], static_cast<size_t>(INT_MAX))) {
- goto err;
- }
-
- if (rs.pos[i] >= rs.pos[i + 1]) {
- goto err; // empty or negative range
- }
-
- size_t sz = rs.pos[i + 1] - rs.pos[i];
- if (rs.size > SIZE_MAX - sz) {
- goto err; // overflow
- }
-
- rs.size += sz;
- }
-
- return rs;
-
-err:
- LOG(ERROR) << "failed to parse range '" << range_text << "'";
- exit(EXIT_FAILURE);
-}
-
-static bool range_overlaps(const RangeSet& r1, const RangeSet& r2) {
- for (size_t i = 0; i < r1.count; ++i) {
- size_t r1_0 = r1.pos[i * 2];
- size_t r1_1 = r1.pos[i * 2 + 1];
-
- for (size_t j = 0; j < r2.count; ++j) {
- size_t r2_0 = r2.pos[j * 2];
- size_t r2_1 = r2.pos[j * 2 + 1];
-
- if (!(r2_0 >= r1_1 || r1_0 >= r2_1)) {
- return true;
- }
- }
- }
-
- return false;
-}
-
static int read_all(int fd, uint8_t* data, size_t size) {
size_t so_far = 0;
while (so_far < size) {
@@ -469,7 +380,7 @@ static void PrintHashForCorruptedSourceBlocks(const CommandParameters& params,
return;
}
- RangeSet src = parse_range(params.tokens[pos++]);
+ RangeSet src = RangeSet::Parse(params.tokens[pos++]);
RangeSet locs;
// If there's no stashed blocks, content in the buffer is consecutive and has the same
@@ -483,17 +394,15 @@ static void PrintHashForCorruptedSourceBlocks(const CommandParameters& params,
// Example: for the tokens <4,63946,63947,63948,63979> <4,6,7,8,39> <stashed_blocks>;
// We want to print SHA-1 for the data in buffer[6], buffer[8], buffer[9] ... buffer[38];
// this corresponds to the 32 src blocks #63946, #63948, #63949 ... #63978.
- locs = parse_range(params.tokens[pos++]);
+ locs = RangeSet::Parse(params.tokens[pos++]);
CHECK_EQ(src.size, locs.size);
CHECK_EQ(locs.pos.size() % 2, static_cast<size_t>(0));
}
LOG(INFO) << "printing hash in hex for " << src.size << " source blocks";
for (size_t i = 0; i < src.size; i++) {
- int block_num = src.get_block(i);
- CHECK_NE(block_num, -1);
- int buffer_index = locs.get_block(i);
- CHECK_NE(buffer_index, -1);
+ size_t block_num = src.GetBlockNumber(i);
+ size_t buffer_index = locs.GetBlockNumber(i);
CHECK_LE((buffer_index + 1) * BLOCKSIZE, buffer.size());
uint8_t digest[SHA_DIGEST_LENGTH];
@@ -512,8 +421,7 @@ static void PrintHashForCorruptedStashedBlocks(const std::string& id,
CHECK_EQ(src.size * BLOCKSIZE, buffer.size());
for (size_t i = 0; i < src.size; i++) {
- int block_num = src.get_block(i);
- CHECK_NE(block_num, -1);
+ size_t block_num = src.GetBlockNumber(i);
uint8_t digest[SHA_DIGEST_LENGTH];
SHA1(buffer.data() + i * BLOCKSIZE, BLOCKSIZE, digest);
@@ -925,8 +833,8 @@ static int LoadSourceBlocks(CommandParameters& params, const RangeSet& tgt, size
// no source ranges, only stashes
params.cpos++;
} else {
- RangeSet src = parse_range(params.tokens[params.cpos++]);
- *overlap = range_overlaps(src, tgt);
+ RangeSet src = RangeSet::Parse(params.tokens[params.cpos++]);
+ *overlap = src.Overlaps(tgt);
if (ReadBlocks(src, params.buffer, params.fd) == -1) {
return -1;
@@ -937,7 +845,7 @@ static int LoadSourceBlocks(CommandParameters& params, const RangeSet& tgt, size
return 0;
}
- RangeSet locs = parse_range(params.tokens[params.cpos++]);
+ RangeSet locs = RangeSet::Parse(params.tokens[params.cpos++]);
MoveRange(params.buffer, locs, params.buffer);
}
@@ -959,7 +867,7 @@ static int LoadSourceBlocks(CommandParameters& params, const RangeSet& tgt, size
continue;
}
- RangeSet locs = parse_range(tokens[1]);
+ RangeSet locs = RangeSet::Parse(tokens[1]);
MoveRange(params.buffer, locs, stash);
}
@@ -1023,7 +931,7 @@ static int LoadSrcTgtVersion3(CommandParameters& params, RangeSet& tgt, size_t*
}
// <tgt_range>
- tgt = parse_range(params.tokens[params.cpos++]);
+ tgt = RangeSet::Parse(params.tokens[params.cpos++]);
std::vector<uint8_t> tgtbuffer(tgt.size * BLOCKSIZE);
if (ReadBlocks(tgt, tgtbuffer, params.fd) == -1) {
@@ -1135,7 +1043,7 @@ static int PerformCommandStash(CommandParameters& params) {
return 0;
}
- RangeSet src = parse_range(params.tokens[params.cpos++]);
+ RangeSet src = RangeSet::Parse(params.tokens[params.cpos++]);
allocate(src.size * BLOCKSIZE, params.buffer);
if (ReadBlocks(src, params.buffer, params.fd) == -1) {
@@ -1186,7 +1094,7 @@ static int PerformCommandZero(CommandParameters& params) {
return -1;
}
- RangeSet tgt = parse_range(params.tokens[params.cpos++]);
+ RangeSet tgt = RangeSet::Parse(params.tokens[params.cpos++]);
LOG(INFO) << " zeroing " << tgt.size << " blocks";
@@ -1228,7 +1136,7 @@ static int PerformCommandNew(CommandParameters& params) {
return -1;
}
- RangeSet tgt = parse_range(params.tokens[params.cpos++]);
+ RangeSet tgt = RangeSet::Parse(params.tokens[params.cpos++]);
if (params.canwrite) {
LOG(INFO) << " writing " << tgt.size << " blocks of new data";
@@ -1351,7 +1259,7 @@ static int PerformCommandErase(CommandParameters& params) {
return -1;
}
- RangeSet tgt = parse_range(params.tokens[params.cpos++]);
+ RangeSet tgt = RangeSet::Parse(params.tokens[params.cpos++]);
if (params.canwrite) {
LOG(INFO) << " erasing " << tgt.size << " blocks";
@@ -1733,7 +1641,7 @@ Value* RangeSha1Fn(const char* name, State* state, const std::vector<std::unique
return StringValue("");
}
- RangeSet rs = parse_range(ranges->data);
+ RangeSet rs = RangeSet::Parse(ranges->data);
SHA_CTX ctx;
SHA1_Init(&ctx);
@@ -1871,7 +1779,7 @@ Value* BlockImageRecoverFn(const char* name, State* state,
return StringValue("");
}
- RangeSet rs = parse_range(ranges->data);
+ RangeSet rs = RangeSet::Parse(ranges->data);
uint8_t buffer[BLOCKSIZE];