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Fix lookup_bdev() on Ubuntu

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Ubuntu added support for checking inode permissions to lookup_bdev() in kernel
commit 193fb6a2c94fab8eb8ce70a5da4d21c7d4023bee (merged in 4.4.0-6.21).
Upstream bug: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1636517

This patch adds a test for Ubuntu's variant of lookup_bdev() to configure and
calls the function in the correct way.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Hajo Möller <dasjoe@gmail.com>
Closes #5336
This commit is contained in:
Hajo Möller
2016-10-26 19:30:43 +02:00
committed by Brian Behlendorf
parent 76a87a902e
commit e02aaf17f1
3 changed files with 31 additions and 10 deletions
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include/linux/blkdev_compat.h
+13 -4
View File
@@ -263,12 +263,21 @@ bio_set_flags_failfast(struct block_device *bdev, int *flags)
/*
* 2.6.27 API change
* The function was exported for use, prior to this it existed by the
* The function was exported for use, prior to this it existed but the
* symbol was not exported.
*
* 4.4.0-6.21 API change for Ubuntu
* lookup_bdev() gained a second argument, FMODE_*, to check inode permissions.
*/
#ifndef HAVE_LOOKUP_BDEV
#define lookup_bdev(path) ERR_PTR(-ENOTSUP)
#endif
#ifdef HAVE_1ARG_LOOKUP_BDEV
#define vdev_lookup_bdev(path) lookup_bdev(path)
#else
#ifdef HAVE_2ARGS_LOOKUP_BDEV
#define vdev_lookup_bdev(path) lookup_bdev(path, 0)
#else
#define vdev_lookup_bdev(path) ERR_PTR(-ENOTSUP)
#endif /* HAVE_2ARGS_LOOKUP_BDEV */
#endif /* HAVE_1ARG_LOOKUP_BDEV */
/*
* 2.6.30 API change