Kernel/linux-next
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git synced 2024-12-29 17:22:07 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

NFS client updates for Linux 6.10

Browse Source 
Highlights include:
 
 Stable fixes:
 - nfs: fix undefined behavior in nfs_block_bits()
 - NFSv4.2: Fix READ_PLUS when server doesn't support OP_READ_PLUS
 
 Bugfixes:
 - Fix mixing of the lock/nolock and local_lock mount options
 - NFSv4: Fixup smatch warning for ambiguous return
 - NFSv3: Fix remount when using the legacy binary mount api
 - SUNRPC: Fix the handling of expired RPCSEC_GSS contexts
 - SUNRPC: fix the NFSACL RPC retries when soft mounts are enabled
 - rpcrdma: fix handling for RDMA_CM_EVENT_DEVICE_REMOVAL
 
 Features and cleanups:
 - NFSv3: Use the atomic_open API to fix open(O_CREAT|O_TRUNC)
 - pNFS/filelayout: S layout segment range in LAYOUTGET
 - pNFS: rework pnfs_generic_pg_check_layout to check IO range
 - NFSv2: Turn off enabling of NFS v2 by default
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCAAdFiEESQctxSBg8JpV8KqEZwvnipYKAPIFAmZPpYMACgkQZwvnipYK
 APITOw//acjE9YTZcST9kgkf2bfwuHFcdxvMZAr4MV0YsfqMesU2MYmaK/5YMLyo
 iNCHjLmlfE2iLAUqvFtakc1F3guACJqqFfMdnMHa1MwPznrL3yNNClGnBamovbPd
 XK2MBgpQBXb+xLxqH0A2TtOK2ofk0CFzb3x9eaziox8omBM2j3v6ZARsDHYehuhM
 Hig8IxW/kZ7kx5jxqSVktrgW3gDKqIuLssF6fJVINzh45jHC5QO98cuSwetx6Mi1
 Aw04HbOE6B66ORrzC1wyGN3PwOkTW2kgAiyB6UNNt+Hnvr0RD5TEqf3s3mzmhP9N
 7LJ3H1Okxdcpn0G/bR4LBUg26r5BWxhfPiTYG/l9vAQk65yt2LO1kFzXbECBEfaG
 ctGG7/7mMLVPs05kIFYm5S0cIYW2dYNuE20JY50LMaCIopjThdfruQj3yR4xibSt
 bHrAbG9wW4qg/cgx860t5h7nbZnD5OOYIqKOCDRNrUfP7P0mK/tD49HggLjDo47M
 vIMlYS3bTNSF7uEPTrv6bFr8XOD1I3BVXDQwGaJMZ8zyhkUIQtKO70+i4xM1E/Wl
 Jw5Z6NpM8saDD449ZqX4IRUPDAhvz4v00QqD3Tqr4MHEc5sWi898S7XcJgL3bEai
 QMJmBkAK8aDAP/suPw8VQc9wqplFNlB+QEh87p2WO+yRoEucn+A=
 =HMSC
 -----END PGP SIGNATURE-----

Merge tag 'nfs-for-6.10-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client updates from Trond Myklebust:
 "Stable fixes:
   - nfs: fix undefined behavior in nfs_block_bits()
   - NFSv4.2: Fix READ_PLUS when server doesn't support OP_READ_PLUS

  Bugfixes:
   - Fix mixing of the lock/nolock and local_lock mount options
   - NFSv4: Fixup smatch warning for ambiguous return
   - NFSv3: Fix remount when using the legacy binary mount api
   - SUNRPC: Fix the handling of expired RPCSEC_GSS contexts
   - SUNRPC: fix the NFSACL RPC retries when soft mounts are enabled
   - rpcrdma: fix handling for RDMA_CM_EVENT_DEVICE_REMOVAL

  Features and cleanups:
   - NFSv3: Use the atomic_open API to fix open(O_CREAT|O_TRUNC)
   - pNFS/filelayout: S layout segment range in LAYOUTGET
   - pNFS: rework pnfs_generic_pg_check_layout to check IO range
   - NFSv2: Turn off enabling of NFS v2 by default"

* tag 'nfs-for-6.10-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  nfs: fix undefined behavior in nfs_block_bits()
  pNFS: rework pnfs_generic_pg_check_layout to check IO range
  pNFS/filelayout: check layout segment range
  pNFS/filelayout: fixup pNfs allocation modes
  rpcrdma: fix handling for RDMA_CM_EVENT_DEVICE_REMOVAL
  NFS: Don't enable NFS v2 by default
  NFS: Fix READ_PLUS when server doesn't support OP_READ_PLUS
  sunrpc: fix NFSACL RPC retry on soft mount
  SUNRPC: fix handling expired GSS context
  nfs: keep server info for remounts
  NFSv4: Fixup smatch warning for ambiguous return
  NFS: make sure lock/nolock overriding local_lock mount option
  NFS: add atomic_open for NFSv3 to handle O_TRUNC correctly.
  pNFS/filelayout: Specify the layout segment range in LAYOUTGET
  pNFS/filelayout: Remove the whole file layout requirement
This commit is contained in:
Linus Torvalds 2024-05-23 13:51:09 -07:00
commit 6d69b6c12f
16 changed files with 129 additions and 68 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
fs/nfs/Kconfig
View File

@ -33,12 +33,12 @@ config NFS_FS
config NFS_V2
tristate "NFS client support for NFS version 2"
depends on NFS_FS
default y
default n
help
This option enables support for version 2 of the NFS protocol
(RFC 1094) in the kernel's NFS client.
If unsure, say Y.
If unsure, say N.
config NFS_V3
tristate "NFS client support for NFS version 3"

54
fs/nfs/dir.c
View File

@ -56,6 +56,8 @@ static int nfs_readdir(struct file *, struct dir_context *);
static int nfs_fsync_dir(struct file *, loff_t, loff_t, int);
static loff_t nfs_llseek_dir(struct file *, loff_t, int);
static void nfs_readdir_clear_array(struct folio *);
static int nfs_do_create(struct inode *dir, struct dentry *dentry,
umode_t mode, int open_flags);
const struct file_operations nfs_dir_operations = {
.llseek = nfs_llseek_dir,
@ -2243,6 +2245,41 @@ static int nfs4_lookup_revalidate(struct dentry *dentry, unsigned int flags)
#endif /* CONFIG_NFSV4 */
int nfs_atomic_open_v23(struct inode *dir, struct dentry *dentry,
struct file *file, unsigned int open_flags,
umode_t mode)
{
/* Same as look+open from lookup_open(), but with different O_TRUNC
* handling.
*/
int error = 0;
if (open_flags & O_CREAT) {
file->f_mode |= FMODE_CREATED;
error = nfs_do_create(dir, dentry, mode, open_flags);
if (error)
return error;
return finish_open(file, dentry, NULL);
} else if (d_in_lookup(dentry)) {
/* The only flags nfs_lookup considers are
* LOOKUP_EXCL and LOOKUP_RENAME_TARGET, and
* we want those to be zero so the lookup isn't skipped.
*/
struct dentry *res = nfs_lookup(dir, dentry, 0);
d_lookup_done(dentry);
if (unlikely(res)) {
if (IS_ERR(res))
return PTR_ERR(res);
return finish_no_open(file, res);
}
}
return finish_no_open(file, NULL);
}
EXPORT_SYMBOL_GPL(nfs_atomic_open_v23);
struct dentry *
nfs_add_or_obtain(struct dentry *dentry, struct nfs_fh *fhandle,
struct nfs_fattr *fattr)
@ -2303,18 +2340,23 @@ EXPORT_SYMBOL_GPL(nfs_instantiate);
* that the operation succeeded on the server, but an error in the
* reply path made it appear to have failed.
*/
int nfs_create(struct mnt_idmap *idmap, struct inode *dir,
struct dentry *dentry, umode_t mode, bool excl)
static int nfs_do_create(struct inode *dir, struct dentry *dentry,
umode_t mode, int open_flags)
{
struct iattr attr;
int open_flags = excl ? O_CREAT | O_EXCL : O_CREAT;
int error;
open_flags |= O_CREAT;
dfprintk(VFS, "NFS: create(%s/%lu), %pd\n",
dir->i_sb->s_id, dir->i_ino, dentry);
attr.ia_mode = mode;
attr.ia_valid = ATTR_MODE;
if (open_flags & O_TRUNC) {
attr.ia_size = 0;
attr.ia_valid |= ATTR_SIZE;
}
trace_nfs_create_enter(dir, dentry, open_flags);
error = NFS_PROTO(dir)->create(dir, dentry, &attr, open_flags);
@ -2326,6 +2368,12 @@ int nfs_create(struct mnt_idmap *idmap, struct inode *dir,
d_drop(dentry);
return error;
}
int nfs_create(struct mnt_idmap *idmap, struct inode *dir,
struct dentry *dentry, umode_t mode, bool excl)
{
return nfs_do_create(dir, dentry, mode, excl ? O_EXCL : 0);
}
EXPORT_SYMBOL_GPL(nfs_create);
/*

24
fs/nfs/filelayout/filelayout.c
View File

@ -605,14 +605,6 @@ filelayout_check_layout(struct pnfs_layout_hdr *lo,
dprintk("--> %s\n", __func__);
/* FIXME: remove this check when layout segment support is added */
if (lgr->range.offset != 0 ||
lgr->range.length != NFS4_MAX_UINT64) {
dprintk("%s Only whole file layouts supported. Use MDS i/o\n",
__func__);
goto out;
}
if (fl->pattern_offset > lgr->range.offset) {
dprintk("%s pattern_offset %lld too large\n",
__func__, fl->pattern_offset);
@ -875,15 +867,15 @@ static void
filelayout_pg_init_read(struct nfs_pageio_descriptor *pgio,
struct nfs_page *req)
{
pnfs_generic_pg_check_layout(pgio);
pnfs_generic_pg_check_layout(pgio, req);
if (!pgio->pg_lseg) {
pgio->pg_lseg = fl_pnfs_update_layout(pgio->pg_inode,
nfs_req_openctx(req),
0,
NFS4_MAX_UINT64,
req_offset(req),
req->wb_bytes,
IOMODE_READ,
false,
GFP_KERNEL);
nfs_io_gfp_mask());
if (IS_ERR(pgio->pg_lseg)) {
pgio->pg_error = PTR_ERR(pgio->pg_lseg);
pgio->pg_lseg = NULL;
@ -899,15 +891,15 @@ static void
filelayout_pg_init_write(struct nfs_pageio_descriptor *pgio,
struct nfs_page *req)
{
pnfs_generic_pg_check_layout(pgio);
pnfs_generic_pg_check_layout(pgio, req);
if (!pgio->pg_lseg) {
pgio->pg_lseg = fl_pnfs_update_layout(pgio->pg_inode,
nfs_req_openctx(req),
0,
NFS4_MAX_UINT64,
req_offset(req),
req->wb_bytes,
IOMODE_RW,
false,
GFP_NOFS);
nfs_io_gfp_mask());
if (IS_ERR(pgio->pg_lseg)) {
pgio->pg_error = PTR_ERR(pgio->pg_lseg);
pgio->pg_lseg = NULL;

12
fs/nfs/flexfilelayout/flexfilelayout.c
View File

@ -822,14 +822,6 @@ ff_layout_pg_get_read(struct nfs_pageio_descriptor *pgio,
}
}
static void
ff_layout_pg_check_layout(struct nfs_pageio_descriptor *pgio,
struct nfs_page *req)
{
pnfs_generic_pg_check_layout(pgio);
pnfs_generic_pg_check_range(pgio, req);
}
static void
ff_layout_pg_init_read(struct nfs_pageio_descriptor *pgio,
struct nfs_page *req)
@ -840,7 +832,7 @@ ff_layout_pg_init_read(struct nfs_pageio_descriptor *pgio,
u32 ds_idx;
retry:
ff_layout_pg_check_layout(pgio, req);
pnfs_generic_pg_check_layout(pgio, req);
/* Use full layout for now */
if (!pgio->pg_lseg) {
ff_layout_pg_get_read(pgio, req, false);
@ -895,7 +887,7 @@ ff_layout_pg_init_write(struct nfs_pageio_descriptor *pgio,
u32 i;
retry:
ff_layout_pg_check_layout(pgio, req);
pnfs_generic_pg_check_layout(pgio, req);
if (!pgio->pg_lseg) {
pgio->pg_lseg =
pnfs_update_layout(pgio->pg_inode, nfs_req_openctx(req),

11
fs/nfs/fs_context.c
View File

@ -600,9 +600,11 @@ static int nfs_fs_context_parse_param(struct fs_context *fc,
break;
case Opt_lock:
if (result.negated) {
ctx->lock_status = NFS_LOCK_NOLOCK;
ctx->flags |= NFS_MOUNT_NONLM;
ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL);
} else {
ctx->lock_status = NFS_LOCK_LOCK;
ctx->flags &= ~NFS_MOUNT_NONLM;
ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL);
}
@ -1112,9 +1114,12 @@ static int nfs23_parse_monolithic(struct fs_context *fc,
ctx->acdirmax = data->acdirmax;
ctx->need_mount = false;
memcpy(sap, &data->addr, sizeof(data->addr));
ctx->nfs_server.addrlen = sizeof(data->addr);
ctx->nfs_server.port = ntohs(data->addr.sin_port);
if (!is_remount_fc(fc)) {
memcpy(sap, &data->addr, sizeof(data->addr));
ctx->nfs_server.addrlen = sizeof(data->addr);
ctx->nfs_server.port = ntohs(data->addr.sin_port);
}
if (sap->ss_family != AF_INET ||
!nfs_verify_server_address(sap))
goto out_no_address;

11
fs/nfs/internal.h
View File

@ -112,6 +112,7 @@ struct nfs_fs_context {
unsigned short protofamily;
unsigned short mountfamily;
bool has_sec_mnt_opts;
int lock_status;
struct {
union {
@ -153,6 +154,12 @@ struct nfs_fs_context {
} clone_data;
};
enum nfs_lock_status {
NFS_LOCK_NOT_SET = 0,
NFS_LOCK_LOCK = 1,
NFS_LOCK_NOLOCK = 2,
};
#define nfs_errorf(fc, fmt, ...) ((fc)->log.log ? \
errorf(fc, fmt, ## __VA_ARGS__) : \
({ dprintk(fmt "\n", ## __VA_ARGS__); }))
@ -710,9 +717,9 @@ unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
if ((bsize & (bsize - 1)) || nrbitsp) {
unsigned char nrbits;
for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
for (nrbits = 31; nrbits && !(bsize & (1UL << nrbits)); nrbits--)
;
bsize = 1 << nrbits;
bsize = 1UL << nrbits;
if (nrbitsp)
*nrbitsp = nrbits;
}

1
fs/nfs/nfs3proc.c
View File

@ -986,6 +986,7 @@ static int nfs3_have_delegation(struct inode *inode, fmode_t flags)
static const struct inode_operations nfs3_dir_inode_operations = {
.create = nfs_create,
.atomic_open = nfs_atomic_open_v23,
.lookup = nfs_lookup,
.link = nfs_link,
.unlink = nfs_unlink,

2
fs/nfs/nfs4proc.c
View File

@ -5456,7 +5456,7 @@ static bool nfs4_read_plus_not_supported(struct rpc_task *task,
struct rpc_message *msg = &task->tk_msg;
if (msg->rpc_proc == &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS] &&
server->caps & NFS_CAP_READ_PLUS && task->tk_status == -ENOTSUPP) {
task->tk_status == -ENOTSUPP) {
server->caps &= ~NFS_CAP_READ_PLUS;
msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
rpc_restart_call_prepare(task);

12
fs/nfs/nfs4state.c
View File

@ -2116,6 +2116,7 @@ static int nfs4_try_migration(struct nfs_server *server, const struct cred *cred
{
struct nfs_client *clp = server->nfs_client;
struct nfs4_fs_locations *locations = NULL;
struct nfs_fattr *fattr;
struct inode *inode;
struct page *page;
int status, result;
@ -2125,19 +2126,16 @@ static int nfs4_try_migration(struct nfs_server *server, const struct cred *cred
(unsigned long long)server->fsid.minor,
clp->cl_hostname);
result = 0;
page = alloc_page(GFP_KERNEL);
locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
if (page == NULL || locations == NULL) {
dprintk("<-- %s: no memory\n", __func__);
goto out;
}
locations->fattr = nfs_alloc_fattr();
if (locations->fattr == NULL) {
fattr = nfs_alloc_fattr();
if (page == NULL || locations == NULL || fattr == NULL) {
dprintk("<-- %s: no memory\n", __func__);
result = 0;
goto out;
}
locations->fattr = fattr;
inode = d_inode(server->super->s_root);
result = nfs4_proc_get_locations(server, NFS_FH(inode), locations,
page, cred);

29
fs/nfs/pnfs.c
View File

@ -2705,38 +2705,28 @@ pnfs_layout_return_unused_byclid(struct nfs_client *clp,
&range);
}
/* Check if we have we have a valid layout but if there isn't an intersection
* between the request and the pgio->pg_lseg, put this pgio->pg_lseg away.
*/
void
pnfs_generic_pg_check_layout(struct nfs_pageio_descriptor *pgio)
pnfs_generic_pg_check_layout(struct nfs_pageio_descriptor *pgio,
struct nfs_page *req)
{
if (pgio->pg_lseg == NULL ||
test_bit(NFS_LSEG_VALID, &pgio->pg_lseg->pls_flags))
(test_bit(NFS_LSEG_VALID, &pgio->pg_lseg->pls_flags) &&
pnfs_lseg_request_intersecting(pgio->pg_lseg, req)))
return;
pnfs_put_lseg(pgio->pg_lseg);
pgio->pg_lseg = NULL;
}
EXPORT_SYMBOL_GPL(pnfs_generic_pg_check_layout);
/*
* Check for any intersection between the request and the pgio->pg_lseg,
* and if none, put this pgio->pg_lseg away.
*/
void
pnfs_generic_pg_check_range(struct nfs_pageio_descriptor *pgio, struct nfs_page *req)
{
if (pgio->pg_lseg && !pnfs_lseg_request_intersecting(pgio->pg_lseg, req)) {
pnfs_put_lseg(pgio->pg_lseg);
pgio->pg_lseg = NULL;
}
}
EXPORT_SYMBOL_GPL(pnfs_generic_pg_check_range);
void
pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *req)
{
u64 rd_size;
pnfs_generic_pg_check_layout(pgio);
pnfs_generic_pg_check_range(pgio, req);
pnfs_generic_pg_check_layout(pgio, req);
if (pgio->pg_lseg == NULL) {
if (pgio->pg_dreq == NULL)
rd_size = i_size_read(pgio->pg_inode) - req_offset(req);
@ -2766,8 +2756,7 @@ void
pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio,
struct nfs_page *req, u64 wb_size)
{
pnfs_generic_pg_check_layout(pgio);
pnfs_generic_pg_check_range(pgio, req);
pnfs_generic_pg_check_layout(pgio, req);
if (pgio->pg_lseg == NULL) {
pgio->pg_lseg =
pnfs_update_layout(pgio->pg_inode, nfs_req_openctx(req),

3
fs/nfs/pnfs.h
View File

@ -257,8 +257,7 @@ void pnfs_put_lseg(struct pnfs_layout_segment *lseg);
void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, struct nfs_fsinfo *);
void unset_pnfs_layoutdriver(struct nfs_server *);
void pnfs_generic_pg_check_layout(struct nfs_pageio_descriptor *pgio);
void pnfs_generic_pg_check_range(struct nfs_pageio_descriptor *pgio, struct nfs_page *req);
void pnfs_generic_pg_check_layout(struct nfs_pageio_descriptor *pgio, struct nfs_page *req);
void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *);
int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc);
void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio,

1
fs/nfs/proc.c
View File

@ -695,6 +695,7 @@ static int nfs_have_delegation(struct inode *inode, fmode_t flags)
static const struct inode_operations nfs_dir_inode_operations = {
.create = nfs_create,
.lookup = nfs_lookup,
.atomic_open = nfs_atomic_open_v23,
.link = nfs_link,
.unlink = nfs_unlink,
.symlink = nfs_symlink,

10
fs/nfs/super.c
View File

@ -901,6 +901,16 @@ static struct nfs_server *nfs_try_mount_request(struct fs_context *fc)
rpc_authflavor_t authlist[NFS_MAX_SECFLAVORS];
unsigned int authlist_len = ARRAY_SIZE(authlist);
/* make sure 'nolock'/'lock' override the 'local_lock' mount option */
if (ctx->lock_status) {
if (ctx->lock_status == NFS_LOCK_NOLOCK) {
ctx->flags |= NFS_MOUNT_NONLM;
ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL);
} else {
ctx->flags &= ~NFS_MOUNT_NONLM;
ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL);
}
}
status = nfs_request_mount(fc, ctx->mntfh, authlist, &authlist_len);
if (status)
return ERR_PTR(status);

3
include/linux/nfs_fs.h
View File

@ -561,6 +561,9 @@ extern int nfs_may_open(struct inode *inode, const struct cred *cred, int openfl
extern void nfs_access_zap_cache(struct inode *inode);
extern int nfs_access_get_cached(struct inode *inode, const struct cred *cred,
u32 *mask, bool may_block);
extern int nfs_atomic_open_v23(struct inode *dir, struct dentry *dentry,
struct file *file, unsigned int open_flags,
umode_t mode);
/*
* linux/fs/nfs/symlink.c

14
net/sunrpc/clnt.c
View File

@ -1071,6 +1071,7 @@ struct rpc_clnt *rpc_bind_new_program(struct rpc_clnt *old,
.authflavor = old->cl_auth->au_flavor,
.cred = old->cl_cred,
.stats = old->cl_stats,
.timeout = old->cl_timeout,
};
struct rpc_clnt *clnt;
int err;
@ -2698,8 +2699,19 @@ rpc_decode_header(struct rpc_task *task, struct xdr_stream *xdr)
goto out_msg_denied;
error = rpcauth_checkverf(task, xdr);
if (error)
if (error) {
struct rpc_cred *cred = task->tk_rqstp->rq_cred;
if (!test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags)) {
rpcauth_invalcred(task);
if (!task->tk_cred_retry)
goto out_err;
task->tk_cred_retry--;
trace_rpc__stale_creds(task);
return -EKEYREJECTED;
}
goto out_verifier;
}
p = xdr_inline_decode(xdr, sizeof(*p));
if (!p)

6
net/sunrpc/xprtrdma/verbs.c
View File

@ -244,7 +244,11 @@ rpcrdma_cm_event_handler(struct rdma_cm_id *id, struct rdma_cm_event *event)
case RDMA_CM_EVENT_DEVICE_REMOVAL:
pr_info("rpcrdma: removing device %s for %pISpc\n",
ep->re_id->device->name, sap);
fallthrough;
switch (xchg(&ep->re_connect_status, -ENODEV)) {
case 0: goto wake_connect_worker;
case 1: goto disconnected;
}
return 0;
case RDMA_CM_EVENT_ADDR_CHANGE:
ep->re_connect_status = -ENODEV;
goto disconnected;