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authorTheodore Ts'o <tytso@mit.edu>2018-12-19 14:07:58 -0500
committerTheodore Ts'o <tytso@mit.edu>2018-12-19 14:07:58 -0500
commitfde872682e175743e0c3ef939c89e3c6008a1529 (patch)
tree86b22ce00c58b0e47c0059ae8f82d7ab244859f7 /fs/ext4/super.c
parent8a363970d1dc38c4ec4ad575c862f776f468d057 (diff)
downloadlinux-fde872682e175743e0c3ef939c89e3c6008a1529.tar.bz2
ext4: force inode writes when nfsd calls commit_metadata()
Some time back, nfsd switched from calling vfs_fsync() to using a new commit_metadata() hook in export_operations(). If the file system did not provide a commit_metadata() hook, it fell back to using sync_inode_metadata(). Unfortunately doesn't work on all file systems. In particular, it doesn't work on ext4 due to how the inode gets journalled --- the VFS writeback code will not always call ext4_write_inode(). So we need to provide our own ext4_nfs_commit_metdata() method which calls ext4_write_inode() directly. Google-Bug-Id: 121195940 Signed-off-by: Theodore Ts'o <tytso@mit.edu> Cc: stable@kernel.org
Diffstat (limited to 'fs/ext4/super.c')
-rw-r--r--fs/ext4/super.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index fc9071081600..d6c142d73d99 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1202,6 +1202,16 @@ static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid,
ext4_nfs_get_inode);
}
+static int ext4_nfs_commit_metadata(struct inode *inode)
+{
+ struct writeback_control wbc = {
+ .sync_mode = WB_SYNC_ALL
+ };
+
+ trace_ext4_nfs_commit_metadata(inode);
+ return ext4_write_inode(inode, &wbc);
+}
+
/*
* Try to release metadata pages (indirect blocks, directories) which are
* mapped via the block device. Since these pages could have journal heads
@@ -1406,6 +1416,7 @@ static const struct export_operations ext4_export_ops = {
.fh_to_dentry = ext4_fh_to_dentry,
.fh_to_parent = ext4_fh_to_parent,
.get_parent = ext4_get_parent,
+ .commit_metadata = ext4_nfs_commit_metadata,
};
enum {