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| author | Fabian Frederick <fabf@skynet.be> | 2017-02-27 14:28:00 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-02-27 18:43:46 -0800 |
| commit | b3b42c0deaa1a2fb84508b808385b8a78819f4df (patch) | |
| tree | cfa418ddf1ee87f0b3221f707522cb2922889846 | |
| parent | f567accb3ff4a6ac9a2a50d33e29a076afc7dd2e (diff) | |
| download | linux-b3b42c0deaa1a2fb84508b808385b8a78819f4df.tar.bz2 | |
fs/affs: make export work with cold dcache
This adds get_parent function so that nfs client can still work after
cache drop (Tested on NFS v4 with echo 3 > /proc/sys/vm/drop_caches)
[weiyongjun1@huawei.com: fix return value check in affs_get_parent()]
Link: http://lkml.kernel.org/r/20170123141018.2331-1-weiyj.lk@gmail.com
Link: http://lkml.kernel.org/r/20170109191208.6085-8-fabf@skynet.be
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Suggested-by: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | fs/affs/namei.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/fs/affs/namei.c b/fs/affs/namei.c index fb88446bafef..96dd1d09a273 100644 --- a/fs/affs/namei.c +++ b/fs/affs/namei.c @@ -447,6 +447,24 @@ done: return retval; } +static struct dentry *affs_get_parent(struct dentry *child) +{ + struct inode *parent; + struct buffer_head *bh; + + bh = affs_bread(child->d_sb, d_inode(child)->i_ino); + if (!bh) + return ERR_PTR(-EIO); + + parent = affs_iget(child->d_sb, + be32_to_cpu(AFFS_TAIL(child->d_sb, bh)->parent)); + brelse(bh); + if (IS_ERR(parent)) + return ERR_CAST(parent); + + return d_obtain_alias(parent); +} + static struct inode *affs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation) { @@ -484,6 +502,7 @@ static struct dentry *affs_fh_to_parent(struct super_block *sb, struct fid *fid, const struct export_operations affs_export_ops = { .fh_to_dentry = affs_fh_to_dentry, .fh_to_parent = affs_fh_to_parent, + .get_parent = affs_get_parent, }; const struct dentry_operations affs_dentry_operations = { |