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Commit Graph

24 Commits

Author SHA1 Message Date
Wu Guanghao
262008f1ce unit-test: modify for systems with PGSIZE of 64K
This modification supports dynamically obtaining the value of PAGE_SIZE,
which is compatible with systems with PAGE_SIZE of (4K/64K)

Signed-off-by: wuguanghao <wuguanghao3@huawei.com>
2021-03-11 00:56:43 +01:00
David Teigland
1570e76233 bcache: use indirection table for fd
Add a "device index" (di) for each device, and use this
in the bcache api to the rest of lvm.  This replaces the
file descriptor (fd) in the api.  The rest of lvm uses
new functions bcache_set_fd(), bcache_clear_fd(), and
bcache_change_fd() to control which fd bcache uses for
io to a particular device.

. lvm opens a dev and gets and fd.
  fd = open(dev);

. lvm passes fd to the bcache layer and gets a di
  to use in the bcache api for the dev.
  di = bcache_set_fd(fd);

. lvm uses bcache functions, passing di for the dev.
  bcache_write_bytes(di, ...), etc.

. bcache translates di to fd to do io.

. lvm closes the device and clears the di/fd bcache state.
  close(fd);
  bcache_clear_fd(di);

In the bcache layer, a di-to-fd translation table
(int *_fd_table) is added.  When bcache needs to
perform io on a di, it uses _fd_table[di].

In the following commit, lvm will make use of the new
bcache_change_fd() function to change the fd that
bcache uses for the dev, without dropping cached blocks.
2020-09-18 15:10:11 -05:00
Joe Thornber
5fdebf9bbf [bcache] add unit test
abort-forces-read
2019-10-29 10:33:31 +00:00
Joe Thornber
2938b4dcca [bcache] add bcache_abort()
This gives us a way to cope with write failures.
2019-10-28 15:00:53 +00:00
Zdenek Kabelac
c728d88e11 build: include configure.h
It's important to consistenly include  configure.h as the 1st. header.
It containts #defines influencing behavior of other included header
files.
2018-06-22 23:11:44 +02:00
Joe Thornber
89fdc0b588 Merge branch 'master' into 2018-05-11-fork-libdm 2018-05-16 13:43:02 +01:00
Joe Thornber
7c852c75c3 unit-tests: remove a couple of debug printfs 2018-05-16 10:25:30 +01:00
Joe Thornber
df2acbbb97 bcache: nr_ios_pending wasn't being incremented
... but it was being decremented on completion.  Which meant
it wrapped, and no prefetches were ever issued after the
first completion.
2018-05-16 10:09:17 +01:00
Joe Thornber
7f97c7ea9a build: Don't generate symlinks in include/ dir
As we start refactoring the code to break dependencies (see doc/refactoring.txt),
I want us to use full paths in the includes (eg, #include "base/data-struct/list.h").
This makes it more obvious when we're breaking abstraction boundaries, eg, including a file in
metadata/ from base/
2018-05-14 10:30:20 +01:00
Joe Thornber
67b80e2d9d bcache: knock out err param.
Dave used this for debugging.  Not needed in general.
2018-05-10 13:26:08 +01:00
Joe Thornber
3ea862bdfc unit-test/bcache_t: test was using too large a block size 2018-05-01 14:17:12 +01:00
Joe Thornber
de042fa13d unit-test/bcache_t: Use a stripped down fixture for some tests 2018-05-01 12:54:57 +01:00
Joe Thornber
f564e78d98 bcache: rewrite bcache_{write,zero}_bytes
These are utility functions so should only use the public interface.

Also write_bytes was flushing, which will kill performance.
2018-05-01 12:07:33 +01:00
Joe Thornber
7aba7fe68b unit-test/io_engine_t: add a little test for bcache_{read,write}_bytes 2018-05-01 10:47:40 +01:00
Joe Thornber
f6459757af unit-test/bcache_t: fixup a test.
Problem found with valgrind.
2018-05-01 09:17:55 +01:00
Joe Thornber
ab63923d19 unit-tests: Move to test/unit 2018-04-27 16:55:07 +01:00
Joe Thornber
ea34dad66f [unit-test] Push the new unit test framwork.
See doc/unit-test.txt for details.

Some bcache tests failing.  Probably due to dct changing semantics, will
fix in follow up patch.
2018-04-26 11:59:39 +01:00
Joe Thornber
dc8034f5eb [device/bcache] more work on bcache 2018-04-20 11:12:50 -05:00
Joe Thornber
1cde30eba0 [device/bcache] More fiddling with tests 2018-04-20 11:12:50 -05:00
Joe Thornber
467adfa082 [device/bcache] More tests and some bug fixes 2018-04-20 11:12:50 -05:00
Joe Thornber
b03e55a513 [device/bcache] rename a unit test 2018-04-20 11:12:50 -05:00
Joe Thornber
0d0fab3d2d [device/bcache] another unit test 2018-04-20 11:12:50 -05:00
Joe Thornber
0f0eb04edb [device/bcache] some more work on bcache 2018-04-20 11:12:50 -05:00
Joe Thornber
46867a45d2 [device/bcache] stub a unit test 2018-04-20 11:12:50 -05:00