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authorRoss Zwisler <ross.zwisler@linux.intel.com>2017-10-12 12:00:59 -0400
committerTheodore Ts'o <tytso@mit.edu>2017-10-12 12:00:59 -0400
commit6642586b3e5f9e0b559d20352d8d42ad84224d1f (patch)
tree215de3257712900bb4dd31c14c2da31d044f0507 /fs/ext4
parent7d3e06a8dae893a0df2777543980dc62eff61b59 (diff)
downloadlinux-6642586b3e5f9e0b559d20352d8d42ad84224d1f.tar.bz2
ext4: add ext4_should_use_dax()
This helper, in the spirit of ext4_should_dioread_nolock() et al., replaces the complex conditional in ext4_set_inode_flags(). Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Reviewed-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/ext4')
-rw-r--r--fs/ext4/inode.c19
1 files changed, 16 insertions, 3 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 350e0910ed32..9f836e2ec18c 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -4610,6 +4610,21 @@ int ext4_get_inode_loc(struct inode *inode, struct ext4_iloc *iloc)
!ext4_test_inode_state(inode, EXT4_STATE_XATTR));
}
+static bool ext4_should_use_dax(struct inode *inode)
+{
+ if (!test_opt(inode->i_sb, DAX))
+ return false;
+ if (!S_ISREG(inode->i_mode))
+ return false;
+ if (ext4_should_journal_data(inode))
+ return false;
+ if (ext4_has_inline_data(inode))
+ return false;
+ if (ext4_encrypted_inode(inode))
+ return false;
+ return true;
+}
+
void ext4_set_inode_flags(struct inode *inode)
{
unsigned int flags = EXT4_I(inode)->i_flags;
@@ -4625,9 +4640,7 @@ void ext4_set_inode_flags(struct inode *inode)
new_fl |= S_NOATIME;
if (flags & EXT4_DIRSYNC_FL)
new_fl |= S_DIRSYNC;
- if (test_opt(inode->i_sb, DAX) && S_ISREG(inode->i_mode) &&
- !ext4_should_journal_data(inode) && !ext4_has_inline_data(inode) &&
- !ext4_encrypted_inode(inode))
+ if (ext4_should_use_dax(inode))
new_fl |= S_DAX;
inode_set_flags(inode, new_fl,
S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC|S_DAX);