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Code Packages

crucible: extentwalker: add compressed() and bytenr() methods

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Also use C++11 syntax for construction.

Signed-off-by: Zygo Blaxell <bees@furryterror.org>
This commit is contained in:
Zygo Blaxell 2017-01-11 20:58:01 -05:00
parent 845267821c
commit ffe2a767d3
2 changed files with 22 additions and 19 deletions
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18
include/crucible/extentwalker.h
View File

@ -8,15 +8,15 @@ namespace crucible {
// FIXME: ExtentCursor is probably a better name
struct Extent {
off_t m_begin;
off_t m_end;
uint64_t m_physical;
uint64_t m_flags;
off_t m_begin = 0;
off_t m_end = 0;
uint64_t m_physical = 0;
uint64_t m_flags = 0;
// Btrfs extent reference details
off_t m_physical_len;
off_t m_logical_len;
off_t m_offset;
off_t m_physical_len = 0;
off_t m_logical_len = 0;
off_t m_offset = 0;
// fiemap flags are uint32_t, so bits 32..63 are OK for us
@ -38,10 +38,12 @@ namespace crucible {
off_t physical_len() const { return m_physical_len; }
off_t logical_len() const { return m_logical_len; }
off_t offset() const { return m_offset; }
bool compressed() const;
uint64_t bytenr() const;
bool operator==(const Extent &that) const;
bool operator!=(const Extent &that) const { return !(*this == that); }
Extent();
Extent() = default;
Extent(const Extent &e) = default;
};

23
lib/extentwalker.cc
View File

@ -79,17 +79,6 @@ namespace crucible {
<< "] }";
}
Extent::Extent() :
m_begin(0),
m_end(0),
m_physical(0),
m_flags(0),
m_physical_len(0),
m_logical_len(0),
m_offset(0)
{
}
Extent::operator bool() const
{
THROW_CHECK2(invalid_argument, m_begin, m_end, m_end >= m_begin);
@ -109,6 +98,18 @@ namespace crucible {
return m_begin == that.m_begin && m_end == that.m_end && m_physical == that.m_physical && m_flags == that.m_flags;
}
bool
Extent::compressed() const
{
return m_flags & FIEMAP_EXTENT_ENCODED;
}
uint64_t
Extent::bytenr() const
{
return compressed() ? m_physical : m_physical - m_offset;
}
ExtentWalker::ExtentWalker(Fd fd) :
m_fd(fd),
m_current(m_extents.begin())