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Kernel: Make UserOrKernelBuffer R/W helpers return KResultOr<size_t>

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This makes error propagation less cumbersome (and also exposed some
places where we were not doing it.)
This commit is contained in:
Andreas Kling 2021-05-13 09:08:44 +02:00
parent 25a45e639a
commit e46343bf9a
15 changed files with 64 additions and 85 deletions
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10
Kernel/FileSystem/ProcFS.cpp
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@ -903,17 +903,17 @@ static ssize_t write_sys_bool(InodeIdentifier inode_id, const UserOrKernelBuffer
char value = 0;
bool did_read = false;
ssize_t nread = buffer.read_buffered<1>(1, [&](const u8* data, size_t) {
auto result = buffer.read_buffered<1>(1, [&](u8 const* data, size_t) {
if (did_read)
return 0;
value = (char)data[0];
did_read = true;
return 1;
});
if (nread < 0)
return nread;
VERIFY(nread == 0 || (nread == 1 && did_read));
if (nread == 0 || !(value == '0' || value == '1'))
if (result.is_error())
return result.error();
VERIFY(result.value() == 0 || (result.value() == 1 && did_read));
if (result.value() == 0 || !(value == '0' || value == '1'))
return (ssize_t)size;
auto* lockable_bool = reinterpret_cast<Lockable<bool>*>(variable.address);