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[6/9] f2fs: Do not allow adaptive mode for host-managed zoned block devices

Message ID 1477641337-12321-7-git-send-email-damien.lemoal@wdc.com (mailing list archive)
State New, archived
Headers show

Commit Message

Damien Le Moal Oct. 28, 2016, 7:55 a.m. UTC 
The LFS mode is mandatory for host-managed zoned block devices as
update in place optimizations are not possible for segments in
sequential zones.

Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
---
 fs/f2fs/super.c | 7 +++++++
 1 file changed, 7 insertions(+)
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Patch

diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 2c8a12e..58fd69d 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -518,6 +518,13 @@  static int parse_options(struct super_block *sb, char *options)
 				return -ENOMEM;
 			if (strlen(name) == 8 &&
 					!strncmp(name, "adaptive", 8)) {
+				if (f2fs_sb_mounted_blkzoned(sb)) {
+					f2fs_msg(sb, KERN_WARNING,
+						 "adaptive mode is not allowed with "
+						 "zoned block device feature");
+					kfree(name);
+					return -EINVAL;
+				}
 				set_opt_mode(sbi, F2FS_MOUNT_ADAPTIVE);
 			} else if (strlen(name) == 3 &&
 					!strncmp(name, "lfs", 3)) {