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authorLinus Torvalds <torvalds@linux-foundation.org>2020-02-28 08:34:47 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2020-02-28 08:34:47 -0800
commitbfeb4f9977348daaaf7283ff365d81f7ee95940a (patch)
tree41fadae29769848070ce7483979d0e432009ef35
parent45d0b75b98bf1de4b3a5b09188c75f3bfa3152b0 (diff)
parent0dda2ddb7ded1395189e95d43106469687c07795 (diff)
Merge tag 'zonefs-5.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/zonefs
Pull zonefs fixes from Damien Le Moal: "Two fixes in here: - Revert the initial decision to silently ignore IOCB_NOWAIT for asynchronous direct IOs to sequential zone files. Instead, return an error to the user to signal that the feature is not supported (from Christoph) - A fix to zonefs Kconfig to select FS_IOMAP to avoid build failures if no other file system already selected this option (from Johannes)" * tag 'zonefs-5.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/zonefs: zonefs: select FS_IOMAP zonefs: fix IOCB_NOWAIT handling
-rw-r--r--fs/zonefs/Kconfig1
-rw-r--r--fs/zonefs/super.c8
2 files changed, 5 insertions, 4 deletions
diff --git a/fs/zonefs/Kconfig b/fs/zonefs/Kconfig
index fb87ad372e29..ef2697b78820 100644
--- a/fs/zonefs/Kconfig
+++ b/fs/zonefs/Kconfig
@@ -2,6 +2,7 @@ config ZONEFS_FS
tristate "zonefs filesystem support"
depends on BLOCK
depends on BLK_DEV_ZONED
+ select FS_IOMAP
help
zonefs is a simple file system which exposes zones of a zoned block
device (e.g. host-managed or host-aware SMR disk drives) as files.
diff --git a/fs/zonefs/super.c b/fs/zonefs/super.c
index 8bc6ef82d693..69aee3dfb660 100644
--- a/fs/zonefs/super.c
+++ b/fs/zonefs/super.c
@@ -601,13 +601,13 @@ static ssize_t zonefs_file_dio_write(struct kiocb *iocb, struct iov_iter *from)
ssize_t ret;
/*
- * For async direct IOs to sequential zone files, ignore IOCB_NOWAIT
+ * For async direct IOs to sequential zone files, refuse IOCB_NOWAIT
* as this can cause write reordering (e.g. the first aio gets EAGAIN
* on the inode lock but the second goes through but is now unaligned).
*/
- if (zi->i_ztype == ZONEFS_ZTYPE_SEQ && !is_sync_kiocb(iocb)
- && (iocb->ki_flags & IOCB_NOWAIT))
- iocb->ki_flags &= ~IOCB_NOWAIT;
+ if (zi->i_ztype == ZONEFS_ZTYPE_SEQ && !is_sync_kiocb(iocb) &&
+ (iocb->ki_flags & IOCB_NOWAIT))
+ return -EOPNOTSUPP;
if (iocb->ki_flags & IOCB_NOWAIT) {
if (!inode_trylock(inode))

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