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ext4, dax: set ext4_dax_aops for dax files
Sync syscall to DAX file needs to flush processor cache, but it
currently does not flush to existing DAX files. This is because
'ext4_da_aops' is set to address_space_operations of existing DAX
files, instead of 'ext4_dax_aops', since S_DAX flag is set after
ext4_set_aops() in the open path.
New file
--------
lookup_open
ext4_create
__ext4_new_inode
ext4_set_inode_flags // Set S_DAX flag
ext4_set_aops // Set aops to ext4_dax_aops
Existing file
-------------
lookup_open
ext4_lookup
ext4_iget
ext4_set_aops // Set aops to ext4_da_aops
ext4_set_inode_flags // Set S_DAX flag
Change ext4_iget() to initialize i_flags before ext4_set_aops().
Fixes: 5f0663bb4a
("ext4, dax: introduce ext4_dax_aops")
Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Suggested-by: Jan Kara <jack@suse.cz>
Cc: stable@vger.kernel.org
This commit is contained in:
parent
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commit
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1 changed files with 1 additions and 1 deletions
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@ -4896,6 +4896,7 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
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* not initialized on a new filesystem. */
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}
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ei->i_flags = le32_to_cpu(raw_inode->i_flags);
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ext4_set_inode_flags(inode);
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inode->i_blocks = ext4_inode_blocks(raw_inode, ei);
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ei->i_file_acl = le32_to_cpu(raw_inode->i_file_acl_lo);
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if (ext4_has_feature_64bit(sb))
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@ -5042,7 +5043,6 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
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goto bad_inode;
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}
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brelse(iloc.bh);
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ext4_set_inode_flags(inode);
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unlock_new_inode(inode);
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return inode;
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