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cifs: store the leaseKey in the fid on SMB2_open

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In SMB2_open(), if we got a lease we need to store this in the fid structure
or else we will never be able to map a lease break back to which file/fid
it applies to.

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Steve French <smfrench@gmail.com>
This commit is contained in:
Ronnie Sahlberg 2018-04-26 08:10:18 -06:00 committed by Steve French
parent 71992e62b8
commit 96164ab2d8
3 changed files with 11 additions and 6 deletions
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2
fs/cifs/cifsglob.h
View File

@ -417,7 +417,7 @@ struct smb_version_operations {
/* create lease context buffer for CREATE request */
char * (*create_lease_buf)(u8 *, u8);
/* parse lease context buffer and return oplock/epoch info */
__u8 (*parse_lease_buf)(void *, unsigned int *);
__u8 (*parse_lease_buf)(void *buf, unsigned int *epoch, char *lkey);
ssize_t (*copychunk_range)(const unsigned int,
struct cifsFileInfo *src_file,
struct cifsFileInfo *target_file,

7
fs/cifs/smb2ops.c
View File

@ -2079,7 +2079,7 @@ smb3_create_lease_buf(u8 *lease_key, u8 oplock)
}
static __u8
smb2_parse_lease_buf(void *buf, unsigned int *epoch)
smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
{
struct create_lease *lc = (struct create_lease *)buf;
@ -2090,13 +2090,16 @@ smb2_parse_lease_buf(void *buf, unsigned int *epoch)
}
static __u8
smb3_parse_lease_buf(void *buf, unsigned int *epoch)
smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
{
struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
*epoch = le16_to_cpu(lc->lcontext.Epoch);
if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
return SMB2_OPLOCK_LEVEL_NOCHANGE;
if (lease_key)
memcpy(lease_key, &lc->lcontext.LeaseKeyLow,
SMB2_LEASE_KEY_SIZE);
return le32_to_cpu(lc->lcontext.LeaseState);
}

8
fs/cifs/smb2pdu.c
View File

@ -1575,7 +1575,7 @@ create_reconnect_durable_buf(struct cifs_fid *fid)
static __u8
parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp,
unsigned int *epoch)
unsigned int *epoch, char *lease_key)
{
char *data_offset;
struct create_context *cc;
@ -1590,7 +1590,8 @@ parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp,
name = le16_to_cpu(cc->NameOffset) + (char *)cc;
if (le16_to_cpu(cc->NameLength) == 4 &&
strncmp(name, "RqLs", 4) == 0)
return server->ops->parse_lease_buf(cc, epoch);
return server->ops->parse_lease_buf(cc, epoch,
lease_key);
next = le32_to_cpu(cc->Next);
if (!next)
@ -1972,7 +1973,8 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
}
if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
*oplock = parse_lease_state(server, rsp, &oparms->fid->epoch);
*oplock = parse_lease_state(server, rsp, &oparms->fid->epoch,
oparms->fid->lease_key);
else
*oplock = rsp->OplockLevel;
creat_exit: