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NFSv4: bump/drop the nlink count on the parent dir when we mkdir/rmdir

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Ensure that we always bump or drop the nlink count on the parent directory
when we do a mkdir or a rmdir(). This needs to be done by hand as we don't
have pre/post op attributes.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Trond Myklebust 2018-07-31 15:54:10 -04:00 committed by Anna Schumaker
parent c16467dc03
commit 3c591175d6
1 changed files with 42 additions and 8 deletions
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50
fs/nfs/nfs4proc.c
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@ -1078,12 +1078,26 @@ int nfs4_call_sync(struct rpc_clnt *clnt,
return nfs4_call_sync_sequence(clnt, server, msg, args, res);
}
static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo,
static void
nfs4_inc_nlink_locked(struct inode *inode)
{
NFS_I(inode)->cache_validity |= NFS_INO_INVALID_OTHER;
inc_nlink(inode);
}
static void
nfs4_dec_nlink_locked(struct inode *inode)
{
NFS_I(inode)->cache_validity |= NFS_INO_INVALID_OTHER;
drop_nlink(inode);
}
static void
update_changeattr_locked(struct inode *dir, struct nfs4_change_info *cinfo,
unsigned long timestamp)
{
struct nfs_inode *nfsi = NFS_I(dir);
spin_lock(&dir->i_lock);
nfsi->cache_validity |= NFS_INO_INVALID_CTIME
| NFS_INO_INVALID_MTIME
| NFS_INO_INVALID_DATA;
@ -1100,6 +1114,14 @@ static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo,
nfsi->read_cache_jiffies = timestamp;
nfsi->attr_gencount = nfs_inc_attr_generation_counter();
nfs_fscache_invalidate(dir);
}
static void
update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo,
unsigned long timestamp)
{
spin_lock(&dir->i_lock);
update_changeattr_locked(dir, cinfo, timestamp);
spin_unlock(&dir->i_lock);
}
@ -4248,7 +4270,8 @@ nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
return status;
}
static int _nfs4_proc_remove(struct inode *dir, const struct qstr *name)
static int
_nfs4_proc_remove(struct inode *dir, const struct qstr *name, u32 ftype)
{
struct nfs_server *server = NFS_SERVER(dir);
struct nfs_removeargs args = {
@ -4267,8 +4290,14 @@ static int _nfs4_proc_remove(struct inode *dir, const struct qstr *name)
int status;
status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
if (status == 0)
update_changeattr(dir, &res.cinfo, timestamp);
if (status == 0) {
spin_lock(&dir->i_lock);
update_changeattr_locked(dir, &res.cinfo, timestamp);
/* Removing a directory decrements nlink in the parent */
if (ftype == NF4DIR && dir->i_nlink > 2)
nfs4_dec_nlink_locked(dir);
spin_unlock(&dir->i_lock);
}
return status;
}
@ -4285,7 +4314,7 @@ static int nfs4_proc_remove(struct inode *dir, struct dentry *dentry)
nfs4_inode_make_writeable(inode);
}
do {
err = _nfs4_proc_remove(dir, &dentry->d_name);
err = _nfs4_proc_remove(dir, &dentry->d_name, NF4REG);
trace_nfs4_remove(dir, &dentry->d_name, err);
err = nfs4_handle_exception(NFS_SERVER(dir), err,
&exception);
@ -4299,7 +4328,7 @@ static int nfs4_proc_rmdir(struct inode *dir, const struct qstr *name)
int err;
do {
err = _nfs4_proc_remove(dir, name);
err = _nfs4_proc_remove(dir, name, NF4DIR);
trace_nfs4_remove(dir, name, err);
err = nfs4_handle_exception(NFS_SERVER(dir), err,
&exception);
@ -4503,8 +4532,13 @@ static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_
int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
&data->arg.seq_args, &data->res.seq_res, 1);
if (status == 0) {
update_changeattr(dir, &data->res.dir_cinfo,
spin_lock(&dir->i_lock);
update_changeattr_locked(dir, &data->res.dir_cinfo,
data->res.fattr->time_start);
/* Creating a directory bumps nlink in the parent */
if (data->arg.ftype == NF4DIR)
nfs4_inc_nlink_locked(dir);
spin_unlock(&dir->i_lock);
status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
}
return status;