From: Damien Le Moal damien.lemoal@opensource.wdc.com
commit 77af13ba3c7f91d91c377c7e2d122849bbc17128 upstream.
The call to invalidate_inode_pages2_range() in __iomap_dio_rw() may fail, in which case -ENOTBLK is returned and this error code is propagated back to user space trhough iomap_dio_rw() -> zonefs_file_dio_write() return chain. This error code is fairly obscure and may confuse the user. Avoid this and be consistent with the behavior of zonefs_file_dio_append() for similar invalidate_inode_pages2_range() errors by returning -EBUSY to user space when iomap_dio_rw() returns -ENOTBLK.
Suggested-by: Christoph Hellwig hch@infradead.org Fixes: 8dcc1a9d90c1 ("fs: New zonefs file system") Cc: stable@vger.kernel.org Signed-off-by: Damien Le Moal damien.lemoal@opensource.wdc.com Reviewed-by: Christoph Hellwig hch@lst.de Reviewed-by: Johannes Thumshirn johannes.thumshirn@wdc.com Tested-by: Hans Holmberg hans.holmberg@wdc.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/zonefs/file.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-)
--- a/fs/zonefs/file.c +++ b/fs/zonefs/file.c @@ -567,11 +567,21 @@ static ssize_t zonefs_file_dio_write(str append = sync; }
- if (append) + if (append) { ret = zonefs_file_dio_append(iocb, from); - else + } else { + /* + * iomap_dio_rw() may return ENOTBLK if there was an issue with + * page invalidation. Overwrite that error code with EBUSY to + * be consistent with zonefs_file_dio_append() return value for + * similar issues. + */ ret = iomap_dio_rw(iocb, from, &zonefs_write_iomap_ops, &zonefs_write_dio_ops, 0, NULL, 0); + if (ret == -ENOTBLK) + ret = -EBUSY; + } + if (zonefs_zone_is_seq(z) && (ret > 0 || ret == -EIOCBQUEUED)) { if (ret > 0)