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Added support for using underlying devices -- we need to get the size with

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the B_GET_GEOMETRY ioctl instead.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37658 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Ingo Weinhold 2010-07-21 15:29:29 +00:00
parent 403859d79f
commit fb2d716a99
1 changed files with 23 additions and 2 deletions
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25
src/tests/system/kernel/file_corruption/driver/checksum_device.cpp
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@ -326,7 +326,7 @@ struct RawDevice : Device, DoublyLinkedListLinkImpl<RawDevice> {
status_t Init(const char* fileName)
{
// open and stat file
// open file/device
fFD = open(fileName, O_RDWR | O_NOCACHE);
// TODO: The O_NOCACHE is a work-around for a page writer problem.
// Since it collects pages for writing back without regard for
@ -336,11 +336,32 @@ struct RawDevice : Device, DoublyLinkedListLinkImpl<RawDevice> {
if (fFD < 0)
return errno;
// get the size
struct stat st;
if (fstat(fFD, &st) < 0)
return errno;
fFileSize = st.st_size / B_PAGE_SIZE * B_PAGE_SIZE;
switch (st.st_mode & S_IFMT) {
case S_IFREG:
fFileSize = st.st_size;
break;
case S_IFCHR:
case S_IFBLK:
{
device_geometry geometry;
if (ioctl(fFD, B_GET_GEOMETRY, &geometry, sizeof(geometry)) < 0)
return errno;
fFileSize = (off_t)geometry.bytes_per_sector
* geometry.sectors_per_track
* geometry.cylinder_count * geometry.head_count;
break;
}
default:
return B_BAD_VALUE;
}
fFileSize = fFileSize / B_PAGE_SIZE * B_PAGE_SIZE;
fDeviceSize = fFileSize / (B_PAGE_SIZE + kCheckSumLength) * B_PAGE_SIZE;
// find a free slot