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| author | Theodore Ts'o <tytso@mit.edu> | 2018-12-19 14:07:58 -0500 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2018-12-19 14:07:58 -0500 |
| commit | fde872682e175743e0c3ef939c89e3c6008a1529 (patch) | |
| tree | 86b22ce00c58b0e47c0059ae8f82d7ab244859f7 | |
| parent | 8a363970d1dc38c4ec4ad575c862f776f468d057 (diff) | |
| download | linux-fde872682e175743e0c3ef939c89e3c6008a1529.tar.gz linux-fde872682e175743e0c3ef939c89e3c6008a1529.tar.bz2 linux-fde872682e175743e0c3ef939c89e3c6008a1529.zip | |
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
| -rw-r--r-- | fs/ext4/super.c | 11 | ||||
| -rw-r--r-- | include/trace/events/ext4.h | 20 |
2 files changed, 31 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 { diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h index 698e0d8a5ca4..d68e9e536814 100644 --- a/include/trace/events/ext4.h +++ b/include/trace/events/ext4.h @@ -226,6 +226,26 @@ TRACE_EVENT(ext4_drop_inode, (unsigned long) __entry->ino, __entry->drop) ); +TRACE_EVENT(ext4_nfs_commit_metadata, + TP_PROTO(struct inode *inode), + + TP_ARGS(inode), + + TP_STRUCT__entry( + __field( dev_t, dev ) + __field( ino_t, ino ) + ), + + TP_fast_assign( + __entry->dev = inode->i_sb->s_dev; + __entry->ino = inode->i_ino; + ), + + TP_printk("dev %d,%d ino %lu", + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long) __entry->ino) +); + TRACE_EVENT(ext4_mark_inode_dirty, TP_PROTO(struct inode *inode, unsigned long IP), |