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two fixes for stable for guest mount problems with smb3.1.1, two fixes for crediting on resent requests, a byte range lock leak fix and fixes for two incorrect rc mappings

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Merge tag '5.1-rc1-cifs-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6

Pull smb3 fixes from Steve French:

 - two fixes for stable for guest mount problems with smb3.1.1

 - two fixes for crediting (SMB3 flow control) on resent requests

 - a byte range lock leak fix

 - two fixes for incorrect rc mappings

* tag '5.1-rc1-cifs-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: update internal module version number
  SMB3: Fix SMB3.1.1 guest mounts to Samba
  cifs: Fix slab-out-of-bounds when tracing SMB tcon
  cifs: allow guest mounts to work for smb3.11
  fix incorrect error code mapping for OBJECTID_NOT_FOUND
  cifs: fix that return -EINVAL when do dedupe operation
  CIFS: Fix an issue with re-sending rdata when transport returning -EAGAIN
  CIFS: Fix an issue with re-sending wdata when transport returning -EAGAIN
This commit is contained in:
Linus Torvalds 2019-03-24 09:58:08 -07:00
commit 38104c0020
6 changed files with 104 additions and 72 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
fs/cifs/cifsfs.c
View File

@ -1008,7 +1008,7 @@ static loff_t cifs_remap_file_range(struct file *src_file, loff_t off,
unsigned int xid;
int rc;
if (remap_flags & ~REMAP_FILE_ADVISORY)
if (remap_flags & ~(REMAP_FILE_DEDUP | REMAP_FILE_ADVISORY))
return -EINVAL;
cifs_dbg(FYI, "clone range\n");

2
fs/cifs/cifsfs.h
View File

@ -150,5 +150,5 @@ extern long cifs_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
extern const struct export_operations cifs_export_ops;
#endif /* CONFIG_CIFS_NFSD_EXPORT */
#define CIFS_VERSION "2.18"
#define CIFS_VERSION "2.19"
#endif /* _CIFSFS_H */

152
fs/cifs/file.c
View File

@ -2632,43 +2632,56 @@ cifs_resend_wdata(struct cifs_writedata *wdata, struct list_head *wdata_list,
struct TCP_Server_Info *server =
tlink_tcon(wdata->cfile->tlink)->ses->server;
/*
* Wait for credits to resend this wdata.
* Note: we are attempting to resend the whole wdata not in segments
*/
do {
rc = server->ops->wait_mtu_credits(server, wdata->bytes, &wsize,
&credits);
if (rc)
goto out;
if (wsize < wdata->bytes) {
add_credits_and_wake_if(server, &credits, 0);
msleep(1000);
}
} while (wsize < wdata->bytes);
wdata->credits = credits;
rc = -EAGAIN;
while (rc == -EAGAIN) {
rc = 0;
if (wdata->cfile->invalidHandle)
if (wdata->cfile->invalidHandle) {
rc = cifs_reopen_file(wdata->cfile, false);
if (!rc)
rc = server->ops->async_writev(wdata,
if (rc == -EAGAIN)
continue;
else if (rc)
break;
}
/*
* Wait for credits to resend this wdata.
* Note: we are attempting to resend the whole wdata not in
* segments
*/
do {
rc = server->ops->wait_mtu_credits(server, wdata->bytes,
&wsize, &credits);
if (rc)
goto fail;
if (wsize < wdata->bytes) {
add_credits_and_wake_if(server, &credits, 0);
msleep(1000);
}
} while (wsize < wdata->bytes);
wdata->credits = credits;
rc = adjust_credits(server, &wdata->credits, wdata->bytes);
if (!rc) {
if (wdata->cfile->invalidHandle)
rc = -EAGAIN;
else
rc = server->ops->async_writev(wdata,
cifs_uncached_writedata_release);
}
}
if (!rc) {
list_add_tail(&wdata->list, wdata_list);
return 0;
}
/* If the write was successfully sent, we are done */
if (!rc) {
list_add_tail(&wdata->list, wdata_list);
return 0;
}
add_credits_and_wake_if(server, &wdata->credits, 0);
out:
/* Roll back credits and retry if needed */
add_credits_and_wake_if(server, &wdata->credits, 0);
} while (rc == -EAGAIN);
fail:
kref_put(&wdata->refcount, cifs_uncached_writedata_release);
return rc;
}
@ -2896,12 +2909,12 @@ static void collect_uncached_write_data(struct cifs_aio_ctx *ctx)
wdata->bytes, &tmp_from,
ctx->cfile, cifs_sb, &tmp_list,
ctx);
kref_put(&wdata->refcount,
cifs_uncached_writedata_release);
}
list_splice(&tmp_list, &ctx->list);
kref_put(&wdata->refcount,
cifs_uncached_writedata_release);
goto restart_loop;
}
}
@ -3348,44 +3361,55 @@ static int cifs_resend_rdata(struct cifs_readdata *rdata,
struct TCP_Server_Info *server =
tlink_tcon(rdata->cfile->tlink)->ses->server;
/*
* Wait for credits to resend this rdata.
* Note: we are attempting to resend the whole rdata not in segments
*/
do {
rc = server->ops->wait_mtu_credits(server, rdata->bytes,
if (rdata->cfile->invalidHandle) {
rc = cifs_reopen_file(rdata->cfile, true);
if (rc == -EAGAIN)
continue;
else if (rc)
break;
}
/*
* Wait for credits to resend this rdata.
* Note: we are attempting to resend the whole rdata not in
* segments
*/
do {
rc = server->ops->wait_mtu_credits(server, rdata->bytes,
&rsize, &credits);
if (rc)
goto out;
if (rc)
goto fail;
if (rsize < rdata->bytes) {
add_credits_and_wake_if(server, &credits, 0);
msleep(1000);
if (rsize < rdata->bytes) {
add_credits_and_wake_if(server, &credits, 0);
msleep(1000);
}
} while (rsize < rdata->bytes);
rdata->credits = credits;
rc = adjust_credits(server, &rdata->credits, rdata->bytes);
if (!rc) {
if (rdata->cfile->invalidHandle)
rc = -EAGAIN;
else
rc = server->ops->async_readv(rdata);
}
} while (rsize < rdata->bytes);
rdata->credits = credits;
rc = -EAGAIN;
while (rc == -EAGAIN) {
rc = 0;
if (rdata->cfile->invalidHandle)
rc = cifs_reopen_file(rdata->cfile, true);
if (!rc)
rc = server->ops->async_readv(rdata);
}
/* If the read was successfully sent, we are done */
if (!rc) {
/* Add to aio pending list */
list_add_tail(&rdata->list, rdata_list);
return 0;
}
if (!rc) {
/* Add to aio pending list */
list_add_tail(&rdata->list, rdata_list);
return 0;
}
add_credits_and_wake_if(server, &rdata->credits, 0);
out:
kref_put(&rdata->refcount,
cifs_uncached_readdata_release);
/* Roll back credits and retry if needed */
add_credits_and_wake_if(server, &rdata->credits, 0);
} while (rc == -EAGAIN);
fail:
kref_put(&rdata->refcount, cifs_uncached_readdata_release);
return rc;
}

3
fs/cifs/smb2maperror.c
View File

@ -1036,7 +1036,8 @@ static const struct status_to_posix_error smb2_error_map_table[] = {
{STATUS_UNFINISHED_CONTEXT_DELETED, -EIO,
"STATUS_UNFINISHED_CONTEXT_DELETED"},
{STATUS_NO_TGT_REPLY, -EIO, "STATUS_NO_TGT_REPLY"},
{STATUS_OBJECTID_NOT_FOUND, -EIO, "STATUS_OBJECTID_NOT_FOUND"},
/* Note that ENOATTTR and ENODATA are the same errno */
{STATUS_OBJECTID_NOT_FOUND, -ENODATA, "STATUS_OBJECTID_NOT_FOUND"},
{STATUS_NO_IP_ADDRESSES, -EIO, "STATUS_NO_IP_ADDRESSES"},
{STATUS_WRONG_CREDENTIAL_HANDLE, -EIO,
"STATUS_WRONG_CREDENTIAL_HANDLE"},

11
fs/cifs/smb2pdu.c
View File

@ -1628,9 +1628,16 @@ SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
iov[1].iov_base = unc_path;
iov[1].iov_len = unc_path_len;
/* 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1 */
/*
* 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1
* unless it is guest or anonymous user. See MS-SMB2 3.2.5.3.1
* (Samba servers don't always set the flag so also check if null user)
*/
if ((ses->server->dialect == SMB311_PROT_ID) &&
!smb3_encryption_required(tcon))
!smb3_encryption_required(tcon) &&
!(ses->session_flags &
(SMB2_SESSION_FLAG_IS_GUEST|SMB2_SESSION_FLAG_IS_NULL)) &&
((ses->user_name != NULL) || (ses->sectype == Kerberos)))
req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
memset(&rqst, 0, sizeof(struct smb_rqst));

6
fs/cifs/trace.h
View File

@ -549,19 +549,19 @@ DECLARE_EVENT_CLASS(smb3_tcon_class,
__field(unsigned int, xid)
__field(__u32, tid)
__field(__u64, sesid)
__field(const char *, unc_name)
__string(name, unc_name)
__field(int, rc)
),
TP_fast_assign(
__entry->xid = xid;
__entry->tid = tid;
__entry->sesid = sesid;
__entry->unc_name = unc_name;
__assign_str(name, unc_name);
__entry->rc = rc;
),
TP_printk("xid=%u sid=0x%llx tid=0x%x unc_name=%s rc=%d",
__entry->xid, __entry->sesid, __entry->tid,
__entry->unc_name, __entry->rc)
__get_str(name), __entry->rc)
)
#define DEFINE_SMB3_TCON_EVENT(name) \