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[file_utils] Use aligned memory in zero_superblock

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This commit is contained in:
Joe Thornber 2018-04-17 11:42:43 +01:00
parent abb32897e2
commit 58048dc178
1 changed files with 5 additions and 1 deletions
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6
base/file_utils.cc
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@ -144,10 +144,14 @@ file_utils::get_file_length(string const &file) {
void void
file_utils::zero_superblock(std::string const &path) file_utils::zero_superblock(std::string const &path)
{ {
char *buffer;
unsigned const SUPERBLOCK_SIZE = 4096; unsigned const SUPERBLOCK_SIZE = 4096;
char buffer[SUPERBLOCK_SIZE];
int fd = open_block_file(path, SUPERBLOCK_SIZE, true, true); int fd = open_block_file(path, SUPERBLOCK_SIZE, true, true);
buffer = reinterpret_cast<char *>(aligned_alloc(SUPERBLOCK_SIZE, SUPERBLOCK_SIZE));
if (!buffer)
throw runtime_error("out of memory");
memset(buffer, 0, SUPERBLOCK_SIZE); memset(buffer, 0, SUPERBLOCK_SIZE);
if (::write(fd, buffer, SUPERBLOCK_SIZE) != SUPERBLOCK_SIZE) if (::write(fd, buffer, SUPERBLOCK_SIZE) != SUPERBLOCK_SIZE)
throw runtime_error("couldn't zero superblock"); throw runtime_error("couldn't zero superblock");