microsoft
/
WSL2-Linux-Kernel
зеркало из https://github.com/microsoft/WSL2-Linux-Kernel.git
1
0
Форкнуть 0
Код Задачи Пакеты Проекты Релизы Вики Активность

nfsd: NFSv4 lock-owners are not associated to a specific file 

Just like open-owners, lock-owners are associated with a name, a clientid
and, in the case of minor version 0, a sequence id. There is no association
to a file.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Trond Myklebust 2014-06-30 11:48:40 -04:00 коммит произвёл J. Bruce Fields
Родитель c53530da4d
Коммит b3c32bcd9c
3 изменённых файлов: 14 добавлений и 64 удалений
Показать статистику Скачать Patch файл Скачать Diff файл Показать все файлы Свернуть все файлы

4
fs/nfsd/netns.h
Просмотреть файл

@ -29,9 +29,6 @@
#define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
#define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
#define LOCKOWNER_INO_HASH_BITS 8
#define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS)
#define SESSION_HASH_SIZE 512
struct cld_net;
@ -67,7 +64,6 @@ struct nfsd_net {
struct list_head *unconf_id_hashtbl;
struct rb_root unconf_name_tree;
struct list_head *ownerstr_hashtbl;
struct list_head *lockowner_ino_hashtbl;
struct list_head *sessionid_hashtbl;
/*
* client_lru holds client queue ordered by nfs4_client.cl_time

73
fs/nfsd/nfs4state.c
Просмотреть файл

@ -714,7 +714,6 @@ static void unhash_lockowner(struct nfs4_lockowner *lo)
struct nfs4_ol_stateid *stp;
list_del(&lo->lo_owner.so_strhash);
list_del(&lo->lo_owner_ino_hash);
while (!list_empty(&lo->lo_owner.so_stateids)) {
stp = list_first_entry(&lo->lo_owner.so_stateids,
struct nfs4_ol_stateid, st_perstateowner);
@ -4225,8 +4224,6 @@ out:
#define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
#define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1)
static inline u64
end_offset(u64 start, u64 len)
{
@ -4247,13 +4244,6 @@ last_byte_offset(u64 start, u64 len)
return end > start ? end - 1: NFS4_MAX_UINT64;
}
static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername)
{
return (file_hashval(inode) + cl_id
+ opaque_hashval(ownername->data, ownername->len))
& LOCKOWNER_INO_HASH_MASK;
}
/*
* TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
* we can't properly handle lock requests that go beyond the (2^63 - 1)-th
@ -4306,46 +4296,23 @@ nevermind:
deny->ld_type = NFS4_WRITE_LT;
}
static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner)
{
struct nfs4_ol_stateid *lst;
if (!same_owner_str(&lo->lo_owner, owner, clid))
return false;
if (list_empty(&lo->lo_owner.so_stateids)) {
WARN_ON_ONCE(1);
return false;
}
lst = list_first_entry(&lo->lo_owner.so_stateids,
struct nfs4_ol_stateid, st_perstateowner);
return lst->st_file->fi_inode == inode;
}
static struct nfs4_lockowner *
find_lockowner_str(struct inode *inode, clientid_t *clid,
struct xdr_netobj *owner, struct nfsd_net *nn)
find_lockowner_str(clientid_t *clid, struct xdr_netobj *owner,
struct nfsd_net *nn)
{
unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner);
struct nfs4_lockowner *lo;
unsigned int strhashval = ownerstr_hashval(clid->cl_id, owner);
struct nfs4_stateowner *so;
list_for_each_entry(lo, &nn->lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) {
if (same_lockowner_ino(lo, inode, clid, owner))
return lo;
list_for_each_entry(so, &nn->ownerstr_hashtbl[strhashval], so_strhash) {
if (so->so_is_open_owner)
continue;
if (!same_owner_str(so, owner, clid))
continue;
return lockowner(so);
}
return NULL;
}
static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp)
{
struct inode *inode = open_stp->st_file->fi_inode;
unsigned int inohash = lockowner_ino_hashval(inode,
clp->cl_clientid.cl_id, &lo->lo_owner.so_owner);
struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]);
list_add(&lo->lo_owner_ino_hash, &nn->lockowner_ino_hashtbl[inohash]);
}
/*
* Alloc a lock owner structure.
* Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
@ -4353,10 +4320,10 @@ static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, s
*
* strhashval = ownerstr_hashval
*/
static struct nfs4_lockowner *
alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) {
struct nfs4_lockowner *lo;
struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp);
if (!lo)
@ -4366,7 +4333,7 @@ alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, str
/* It is the openowner seqid that will be incremented in encode in the
* case of new lockowners; so increment the lock seqid manually: */
lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1;
hash_lockowner(lo, strhashval, clp, open_stp);
list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]);
return lo;
}
@ -4432,8 +4399,7 @@ static __be32 lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, s
unsigned int strhashval;
struct nfsd_net *nn = net_generic(cl->net, nfsd_net_id);
lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid,
&lock->v.new.owner, nn);
lo = find_lockowner_str(&cl->cl_clientid, &lock->v.new.owner, nn);
if (!lo) {
strhashval = ownerstr_hashval(cl->cl_clientid.cl_id,
&lock->v.new.owner);
@ -4647,7 +4613,6 @@ __be32
nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_lockt *lockt)
{
struct inode *inode;
struct file_lock *file_lock = NULL;
struct nfs4_lockowner *lo;
__be32 status;
@ -4670,7 +4635,6 @@ nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
goto out;
inode = cstate->current_fh.fh_dentry->d_inode;
file_lock = locks_alloc_lock();
if (!file_lock) {
dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
@ -4693,7 +4657,7 @@ nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
goto out;
}
lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner, nn);
lo = find_lockowner_str(&lockt->lt_clientid, &lockt->lt_owner, nn);
if (lo)
file_lock->fl_owner = (fl_owner_t)lo;
file_lock->fl_pid = current->tgid;
@ -5187,10 +5151,6 @@ static int nfs4_state_create_net(struct net *net)
OWNER_HASH_SIZE, GFP_KERNEL);
if (!nn->ownerstr_hashtbl)
goto err_ownerstr;
nn->lockowner_ino_hashtbl = kmalloc(sizeof(struct list_head) *
LOCKOWNER_INO_HASH_SIZE, GFP_KERNEL);
if (!nn->lockowner_ino_hashtbl)
goto err_lockowner_ino;
nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) *
SESSION_HASH_SIZE, GFP_KERNEL);
if (!nn->sessionid_hashtbl)
@ -5202,8 +5162,6 @@ static int nfs4_state_create_net(struct net *net)
}
for (i = 0; i < OWNER_HASH_SIZE; i++)
INIT_LIST_HEAD(&nn->ownerstr_hashtbl[i]);
for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++)
INIT_LIST_HEAD(&nn->lockowner_ino_hashtbl[i]);
for (i = 0; i < SESSION_HASH_SIZE; i++)
INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]);
nn->conf_name_tree = RB_ROOT;
@ -5219,8 +5177,6 @@ static int nfs4_state_create_net(struct net *net)
return 0;
err_sessionid:
kfree(nn->lockowner_ino_hashtbl);
err_lockowner_ino:
kfree(nn->ownerstr_hashtbl);
err_ownerstr:
kfree(nn->unconf_id_hashtbl);
@ -5252,7 +5208,6 @@ nfs4_state_destroy_net(struct net *net)
}
kfree(nn->sessionid_hashtbl);
kfree(nn->lockowner_ino_hashtbl);
kfree(nn->ownerstr_hashtbl);
kfree(nn->unconf_id_hashtbl);
kfree(nn->conf_id_hashtbl);

1
fs/nfsd/state.h
Просмотреть файл

@ -364,7 +364,6 @@ struct nfs4_openowner {
struct nfs4_lockowner {
struct nfs4_stateowner lo_owner; /* must be first element */
struct list_head lo_owner_ino_hash; /* hash by owner,file */
struct list_head lo_list; /* for temporary uses */
};