mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-02 16:44:10 +08:00
nfsd: reshuffle some code
No change in behavior, I'm just moving some code around to avoid forward references in a following patch. (To do someday: figure out how to split up nfs4state.c. It's big and disorganized.) Signed-off-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
J. Bruce Fields
Chuck Lever
parent
a0ce48375a
commit
ebd9d2c2f5
@ -354,6 +354,124 @@ static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops = {
|
||||
.release = nfsd4_cb_notify_lock_release,
|
||||
};
|
||||
|
||||
/*
|
||||
* We store the NONE, READ, WRITE, and BOTH bits separately in the
|
||||
* st_{access,deny}_bmap field of the stateid, in order to track not
|
||||
* only what share bits are currently in force, but also what
|
||||
* combinations of share bits previous opens have used. This allows us
|
||||
* to enforce the recommendation of rfc 3530 14.2.19 that the server
|
||||
* return an error if the client attempt to downgrade to a combination
|
||||
* of share bits not explicable by closing some of its previous opens.
|
||||
*
|
||||
* XXX: This enforcement is actually incomplete, since we don't keep
|
||||
* track of access/deny bit combinations; so, e.g., we allow:
|
||||
*
|
||||
* OPEN allow read, deny write
|
||||
* OPEN allow both, deny none
|
||||
* DOWNGRADE allow read, deny none
|
||||
*
|
||||
* which we should reject.
|
||||
*/
|
||||
static unsigned int
|
||||
bmap_to_share_mode(unsigned long bmap)
|
||||
{
|
||||
int i;
|
||||
unsigned int access = 0;
|
||||
|
||||
for (i = 1; i < 4; i++) {
|
||||
if (test_bit(i, &bmap))
|
||||
access |= i;
|
||||
}
|
||||
return access;
|
||||
}
|
||||
|
||||
/* set share access for a given stateid */
|
||||
static inline void
|
||||
set_access(u32 access, struct nfs4_ol_stateid *stp)
|
||||
{
|
||||
unsigned char mask = 1 << access;
|
||||
|
||||
WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH);
|
||||
stp->st_access_bmap |= mask;
|
||||
}
|
||||
|
||||
/* clear share access for a given stateid */
|
||||
static inline void
|
||||
clear_access(u32 access, struct nfs4_ol_stateid *stp)
|
||||
{
|
||||
unsigned char mask = 1 << access;
|
||||
|
||||
WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH);
|
||||
stp->st_access_bmap &= ~mask;
|
||||
}
|
||||
|
||||
/* test whether a given stateid has access */
|
||||
static inline bool
|
||||
test_access(u32 access, struct nfs4_ol_stateid *stp)
|
||||
{
|
||||
unsigned char mask = 1 << access;
|
||||
|
||||
return (bool)(stp->st_access_bmap & mask);
|
||||
}
|
||||
|
||||
/* set share deny for a given stateid */
|
||||
static inline void
|
||||
set_deny(u32 deny, struct nfs4_ol_stateid *stp)
|
||||
{
|
||||
unsigned char mask = 1 << deny;
|
||||
|
||||
WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH);
|
||||
stp->st_deny_bmap |= mask;
|
||||
}
|
||||
|
||||
/* clear share deny for a given stateid */
|
||||
static inline void
|
||||
clear_deny(u32 deny, struct nfs4_ol_stateid *stp)
|
||||
{
|
||||
unsigned char mask = 1 << deny;
|
||||
|
||||
WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH);
|
||||
stp->st_deny_bmap &= ~mask;
|
||||
}
|
||||
|
||||
/* test whether a given stateid is denying specific access */
|
||||
static inline bool
|
||||
test_deny(u32 deny, struct nfs4_ol_stateid *stp)
|
||||
{
|
||||
unsigned char mask = 1 << deny;
|
||||
|
||||
return (bool)(stp->st_deny_bmap & mask);
|
||||
}
|
||||
|
||||
static int nfs4_access_to_omode(u32 access)
|
||||
{
|
||||
switch (access & NFS4_SHARE_ACCESS_BOTH) {
|
||||
case NFS4_SHARE_ACCESS_READ:
|
||||
return O_RDONLY;
|
||||
case NFS4_SHARE_ACCESS_WRITE:
|
||||
return O_WRONLY;
|
||||
case NFS4_SHARE_ACCESS_BOTH:
|
||||
return O_RDWR;
|
||||
}
|
||||
WARN_ON_ONCE(1);
|
||||
return O_RDONLY;
|
||||
}
|
||||
|
||||
static inline int
|
||||
access_permit_read(struct nfs4_ol_stateid *stp)
|
||||
{
|
||||
return test_access(NFS4_SHARE_ACCESS_READ, stp) ||
|
||||
test_access(NFS4_SHARE_ACCESS_BOTH, stp) ||
|
||||
test_access(NFS4_SHARE_ACCESS_WRITE, stp);
|
||||
}
|
||||
|
||||
static inline int
|
||||
access_permit_write(struct nfs4_ol_stateid *stp)
|
||||
{
|
||||
return test_access(NFS4_SHARE_ACCESS_WRITE, stp) ||
|
||||
test_access(NFS4_SHARE_ACCESS_BOTH, stp);
|
||||
}
|
||||
|
||||
static inline struct nfs4_stateowner *
|
||||
nfs4_get_stateowner(struct nfs4_stateowner *sop)
|
||||
{
|
||||
@ -1150,108 +1268,6 @@ static unsigned int clientstr_hashval(struct xdr_netobj name)
|
||||
return opaque_hashval(name.data, 8) & CLIENT_HASH_MASK;
|
||||
}
|
||||
|
||||
/*
|
||||
* We store the NONE, READ, WRITE, and BOTH bits separately in the
|
||||
* st_{access,deny}_bmap field of the stateid, in order to track not
|
||||
* only what share bits are currently in force, but also what
|
||||
* combinations of share bits previous opens have used. This allows us
|
||||
* to enforce the recommendation of rfc 3530 14.2.19 that the server
|
||||
* return an error if the client attempt to downgrade to a combination
|
||||
* of share bits not explicable by closing some of its previous opens.
|
||||
*
|
||||
* XXX: This enforcement is actually incomplete, since we don't keep
|
||||
* track of access/deny bit combinations; so, e.g., we allow:
|
||||
*
|
||||
* OPEN allow read, deny write
|
||||
* OPEN allow both, deny none
|
||||
* DOWNGRADE allow read, deny none
|
||||
*
|
||||
* which we should reject.
|
||||
*/
|
||||
static unsigned int
|
||||
bmap_to_share_mode(unsigned long bmap) {
|
||||
int i;
|
||||
unsigned int access = 0;
|
||||
|
||||
for (i = 1; i < 4; i++) {
|
||||
if (test_bit(i, &bmap))
|
||||
access |= i;
|
||||
}
|
||||
return access;
|
||||
}
|
||||
|
||||
/* set share access for a given stateid */
|
||||
static inline void
|
||||
set_access(u32 access, struct nfs4_ol_stateid *stp)
|
||||
{
|
||||
unsigned char mask = 1 << access;
|
||||
|
||||
WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH);
|
||||
stp->st_access_bmap |= mask;
|
||||
}
|
||||
|
||||
/* clear share access for a given stateid */
|
||||
static inline void
|
||||
clear_access(u32 access, struct nfs4_ol_stateid *stp)
|
||||
{
|
||||
unsigned char mask = 1 << access;
|
||||
|
||||
WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH);
|
||||
stp->st_access_bmap &= ~mask;
|
||||
}
|
||||
|
||||
/* test whether a given stateid has access */
|
||||
static inline bool
|
||||
test_access(u32 access, struct nfs4_ol_stateid *stp)
|
||||
{
|
||||
unsigned char mask = 1 << access;
|
||||
|
||||
return (bool)(stp->st_access_bmap & mask);
|
||||
}
|
||||
|
||||
/* set share deny for a given stateid */
|
||||
static inline void
|
||||
set_deny(u32 deny, struct nfs4_ol_stateid *stp)
|
||||
{
|
||||
unsigned char mask = 1 << deny;
|
||||
|
||||
WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH);
|
||||
stp->st_deny_bmap |= mask;
|
||||
}
|
||||
|
||||
/* clear share deny for a given stateid */
|
||||
static inline void
|
||||
clear_deny(u32 deny, struct nfs4_ol_stateid *stp)
|
||||
{
|
||||
unsigned char mask = 1 << deny;
|
||||
|
||||
WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH);
|
||||
stp->st_deny_bmap &= ~mask;
|
||||
}
|
||||
|
||||
/* test whether a given stateid is denying specific access */
|
||||
static inline bool
|
||||
test_deny(u32 deny, struct nfs4_ol_stateid *stp)
|
||||
{
|
||||
unsigned char mask = 1 << deny;
|
||||
|
||||
return (bool)(stp->st_deny_bmap & mask);
|
||||
}
|
||||
|
||||
static int nfs4_access_to_omode(u32 access)
|
||||
{
|
||||
switch (access & NFS4_SHARE_ACCESS_BOTH) {
|
||||
case NFS4_SHARE_ACCESS_READ:
|
||||
return O_RDONLY;
|
||||
case NFS4_SHARE_ACCESS_WRITE:
|
||||
return O_WRONLY;
|
||||
case NFS4_SHARE_ACCESS_BOTH:
|
||||
return O_RDWR;
|
||||
}
|
||||
WARN_ON_ONCE(1);
|
||||
return O_RDONLY;
|
||||
}
|
||||
|
||||
/*
|
||||
* A stateid that had a deny mode associated with it is being released
|
||||
* or downgraded. Recalculate the deny mode on the file.
|
||||
@ -5523,21 +5539,6 @@ static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stid *stp)
|
||||
return nfs_ok;
|
||||
}
|
||||
|
||||
static inline int
|
||||
access_permit_read(struct nfs4_ol_stateid *stp)
|
||||
{
|
||||
return test_access(NFS4_SHARE_ACCESS_READ, stp) ||
|
||||
test_access(NFS4_SHARE_ACCESS_BOTH, stp) ||
|
||||
test_access(NFS4_SHARE_ACCESS_WRITE, stp);
|
||||
}
|
||||
|
||||
static inline int
|
||||
access_permit_write(struct nfs4_ol_stateid *stp)
|
||||
{
|
||||
return test_access(NFS4_SHARE_ACCESS_WRITE, stp) ||
|
||||
test_access(NFS4_SHARE_ACCESS_BOTH, stp);
|
||||
}
|
||||
|
||||
static
|
||||
__be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags)
|
||||
{
|
||||
|
||||
Loading…
Reference in New Issue
Block a user