From: "Theodore Ts'o" <tytso@mit.edu>
To: Ext4 Developers List <linux-ext4@vger.kernel.org>
Cc: "Theodore Ts'o" <tytso@mit.edu>, stable@kernel.org
Subject: [PATCH] ext4: allow the dax flag to be set and cleared on inline directories
Date: Mon, 12 Apr 2021 23:31:24 -0400 [thread overview]
Message-ID: <20210413033124.2256508-1-tytso@mit.edu> (raw)
This is needed to allow generic/620 to pass for file systems with the
inline data_feature enabled, and it allows the use of file systems
where the directories use inline_data, while the files are accessed
via DAX.
Cc: stable@kernel.org
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
fs/ext4/ialloc.c | 3 ++-
fs/ext4/ioctl.c | 6 ++++++
2 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index 5f0c7fe32672..71d321b3b984 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -1292,7 +1292,8 @@ struct inode *__ext4_new_inode(struct user_namespace *mnt_userns,
ei->i_extra_isize = sbi->s_want_extra_isize;
ei->i_inline_off = 0;
- if (ext4_has_feature_inline_data(sb))
+ if (ext4_has_feature_inline_data(sb) &&
+ (!(ei->i_flags & EXT4_DAX_FL) || S_ISDIR(mode)))
ext4_set_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA);
ret = inode;
err = dquot_alloc_inode(inode);
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index a2cf35066f46..0796bfa72829 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -315,6 +315,12 @@ static void ext4_dax_dontcache(struct inode *inode, unsigned int flags)
static bool dax_compatible(struct inode *inode, unsigned int oldflags,
unsigned int flags)
{
+ /* Allow the DAX flag to be changed on inline directories */
+ if (S_ISDIR(inode->i_mode)) {
+ flags &= ~EXT4_INLINE_DATA_FL;
+ oldflags &= ~EXT4_INLINE_DATA_FL;
+ }
+
if (flags & EXT4_DAX_FL) {
if ((oldflags & EXT4_DAX_MUT_EXCL) ||
ext4_test_inode_state(inode,
--
2.31.0
next reply other threads:[~2021-04-13 3:31 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-13 3:31 Theodore Ts'o [this message]
2021-04-13 3:34 ` [PATCH] ext4: allow the dax flag to be set and cleared on inline directories Theodore Ts'o
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