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NFSv4: Add a flags argument to the 'have_delegation' callback

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This argument will be used to allow the caller to specify whether or not
they need to know that this is an attribute delegation.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Lance Shelton <lance.shelton@hammerspace.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Trond Myklebust 2024-06-16 21:21:24 -04:00 committed by Anna Schumaker
parent 43df7110f4
commit 4201916f2a
10 changed files with 43 additions and 34 deletions
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26
fs/nfs/delegation.c
View File

@ -82,11 +82,10 @@ static void nfs_mark_return_delegation(struct nfs_server *server,
set_bit(NFS4CLNT_DELEGRETURN, &server->nfs_client->cl_state);
}
static bool
nfs4_is_valid_delegation(const struct nfs_delegation *delegation,
fmode_t flags)
static bool nfs4_is_valid_delegation(const struct nfs_delegation *delegation,
fmode_t type)
{
if (delegation != NULL && (delegation->type & flags) == flags &&
if (delegation != NULL && (delegation->type & type) == type &&
!test_bit(NFS_DELEGATION_REVOKED, &delegation->flags) &&
!test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
return true;
@ -103,16 +102,16 @@ struct nfs_delegation *nfs4_get_valid_delegation(const struct inode *inode)
return NULL;
}
static int
nfs4_do_check_delegation(struct inode *inode, fmode_t flags, bool mark)
static int nfs4_do_check_delegation(struct inode *inode, fmode_t type,
int flags, bool mark)
{
struct nfs_delegation *delegation;
int ret = 0;
flags &= FMODE_READ|FMODE_WRITE;
type &= FMODE_READ|FMODE_WRITE;
rcu_read_lock();
delegation = rcu_dereference(NFS_I(inode)->delegation);
if (nfs4_is_valid_delegation(delegation, flags)) {
if (nfs4_is_valid_delegation(delegation, type)) {
if (mark)
nfs_mark_delegation_referenced(delegation);
ret = 1;
@ -124,22 +123,23 @@ nfs4_do_check_delegation(struct inode *inode, fmode_t flags, bool mark)
* nfs4_have_delegation - check if inode has a delegation, mark it
* NFS_DELEGATION_REFERENCED if there is one.
* @inode: inode to check
* @flags: delegation types to check for
* @type: delegation types to check for
* @flags: various modifiers
*
* Returns one if inode has the indicated delegation, otherwise zero.
*/
int nfs4_have_delegation(struct inode *inode, fmode_t flags)
int nfs4_have_delegation(struct inode *inode, fmode_t type, int flags)
{
return nfs4_do_check_delegation(inode, flags, true);
return nfs4_do_check_delegation(inode, type, flags, true);
}
/*
* nfs4_check_delegation - check if inode has a delegation, do not mark
* NFS_DELEGATION_REFERENCED if it has one.
*/
int nfs4_check_delegation(struct inode *inode, fmode_t flags)
int nfs4_check_delegation(struct inode *inode, fmode_t type)
{
return nfs4_do_check_delegation(inode, flags, false);
return nfs4_do_check_delegation(inode, type, 0, false);
}
static int nfs_delegation_claim_locks(struct nfs4_state *state, const nfs4_stateid *stateid)

16
fs/nfs/delegation.h
View File

@ -75,8 +75,8 @@ bool nfs4_refresh_delegation_stateid(nfs4_stateid *dst, struct inode *inode);
struct nfs_delegation *nfs4_get_valid_delegation(const struct inode *inode);
void nfs_mark_delegation_referenced(struct nfs_delegation *delegation);
int nfs4_have_delegation(struct inode *inode, fmode_t flags);
int nfs4_check_delegation(struct inode *inode, fmode_t flags);
int nfs4_have_delegation(struct inode *inode, fmode_t type, int flags);
int nfs4_check_delegation(struct inode *inode, fmode_t type);
bool nfs4_delegation_flush_on_close(const struct inode *inode);
void nfs_inode_find_delegation_state_and_recover(struct inode *inode,
const nfs4_stateid *stateid);
@ -84,9 +84,19 @@ int nfs4_inode_make_writeable(struct inode *inode);
#endif
static inline int nfs_have_read_or_write_delegation(struct inode *inode)
{
return NFS_PROTO(inode)->have_delegation(inode, FMODE_READ, 0);
}
static inline int nfs_have_write_delegation(struct inode *inode)
{
return NFS_PROTO(inode)->have_delegation(inode, FMODE_WRITE, 0);
}
static inline int nfs_have_delegated_attributes(struct inode *inode)
{
return NFS_PROTO(inode)->have_delegation(inode, FMODE_READ);
return NFS_PROTO(inode)->have_delegation(inode, FMODE_READ, 0);
}
#endif

2
fs/nfs/dir.c
View File

@ -1437,7 +1437,7 @@ static void nfs_set_verifier_locked(struct dentry *dentry, unsigned long verf)
if (!dir || !nfs_verify_change_attribute(dir, verf))
return;
if (inode && NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
if (inode && NFS_PROTO(inode)->have_delegation(inode, FMODE_READ, 0))
nfs_set_verifier_delegated(&verf);
dentry->d_time = verf;
}

4
fs/nfs/file.c
View File

@ -732,7 +732,7 @@ do_getlk(struct file *filp, int cmd, struct file_lock *fl, int is_local)
}
fl->c.flc_type = saved_type;
if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
if (nfs_have_read_or_write_delegation(inode))
goto out_noconflict;
if (is_local)
@ -815,7 +815,7 @@ do_setlk(struct file *filp, int cmd, struct file_lock *fl, int is_local)
* This makes locking act as a cache coherency point.
*/
nfs_sync_mapping(filp->f_mapping);
if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ)) {
if (!nfs_have_read_or_write_delegation(inode)) {
nfs_zap_caches(inode);
if (mapping_mapped(filp->f_mapping))
nfs_revalidate_mapping(inode, filp->f_mapping);

7
fs/nfs/inode.c
View File

@ -190,9 +190,8 @@ static bool nfs_has_xattr_cache(const struct nfs_inode *nfsi)
void nfs_set_cache_invalid(struct inode *inode, unsigned long flags)
{
struct nfs_inode *nfsi = NFS_I(inode);
bool have_delegation = NFS_PROTO(inode)->have_delegation(inode, FMODE_READ);
if (have_delegation) {
if (nfs_have_delegated_attributes(inode)) {
if (!(flags & NFS_INO_REVAL_FORCED))
flags &= ~(NFS_INO_INVALID_MODE |
NFS_INO_INVALID_OTHER |
@ -1013,7 +1012,7 @@ void nfs_close_context(struct nfs_open_context *ctx, int is_sync)
if (!is_sync)
return;
inode = d_inode(ctx->dentry);
if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
if (nfs_have_read_or_write_delegation(inode))
return;
nfsi = NFS_I(inode);
if (inode->i_mapping->nrpages == 0)
@ -1483,7 +1482,7 @@ static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fat
unsigned long invalid = 0;
struct timespec64 ts;
if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
if (nfs_have_delegated_attributes(inode))
return 0;
if (!(fattr->valid & NFS_ATTR_FATTR_FILEID)) {

2
fs/nfs/nfs3proc.c
View File

@ -979,7 +979,7 @@ nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
return status;
}
static int nfs3_have_delegation(struct inode *inode, fmode_t flags)
static int nfs3_have_delegation(struct inode *inode, fmode_t type, int flags)
{
return 0;
}

14
fs/nfs/nfs4proc.c
View File

@ -293,7 +293,7 @@ static void nfs4_bitmap_copy_adjust(__u32 *dst, const __u32 *src,
unsigned long cache_validity;
memcpy(dst, src, NFS4_BITMASK_SZ*sizeof(*dst));
if (!inode || !nfs4_have_delegation(inode, FMODE_READ))
if (!inode || !nfs_have_read_or_write_delegation(inode))
return;
cache_validity = READ_ONCE(NFS_I(inode)->cache_validity) | flags;
@ -1264,7 +1264,7 @@ nfs4_update_changeattr_locked(struct inode *inode,
if (S_ISDIR(inode->i_mode))
nfs_force_lookup_revalidate(inode);
if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
if (!nfs_have_delegated_attributes(inode))
cache_validity |=
NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL |
NFS_INO_INVALID_SIZE | NFS_INO_INVALID_OTHER |
@ -3700,7 +3700,7 @@ static void nfs4_close_prepare(struct rpc_task *task, void *data)
if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) {
/* Close-to-open cache consistency revalidation */
if (!nfs4_have_delegation(inode, FMODE_READ)) {
if (!nfs4_have_delegation(inode, FMODE_READ, 0)) {
nfs4_bitmask_set(calldata->arg.bitmask_store,
server->cache_consistency_bitmask,
inode, 0);
@ -4638,7 +4638,7 @@ static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry
};
int status = 0;
if (!nfs4_have_delegation(inode, FMODE_READ)) {
if (!nfs4_have_delegation(inode, FMODE_READ, 0)) {
res.fattr = nfs_alloc_fattr();
if (res.fattr == NULL)
return -ENOMEM;
@ -5607,7 +5607,7 @@ bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
/* Otherwise, request attributes if and only if we don't hold
* a delegation
*/
return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
return nfs4_have_delegation(hdr->inode, FMODE_READ, 0) == 0;
}
void nfs4_bitmask_set(__u32 bitmask[], const __u32 src[],
@ -7654,10 +7654,10 @@ static int nfs4_add_lease(struct file *file, int arg, struct file_lease **lease,
int ret;
/* No delegation, no lease */
if (!nfs4_have_delegation(inode, type))
if (!nfs4_have_delegation(inode, type, 0))
return -EAGAIN;
ret = generic_setlease(file, arg, lease, priv);
if (ret || nfs4_have_delegation(inode, type))
if (ret || nfs4_have_delegation(inode, type, 0))
return ret;
/* We raced with a delegation return */
nfs4_delete_lease(file, priv);

2
fs/nfs/proc.c
View File

@ -687,7 +687,7 @@ out_einval:
return -EINVAL;
}
static int nfs_have_delegation(struct inode *inode, fmode_t flags)
static int nfs_have_delegation(struct inode *inode, fmode_t type, int flags)
{
return 0;
}

2
fs/nfs/write.c
View File

@ -1320,7 +1320,7 @@ static int nfs_can_extend_write(struct file *file, struct folio *folio,
return 0;
if (!nfs_folio_write_uptodate(folio, pagelen))
return 0;
if (NFS_PROTO(inode)->have_delegation(inode, FMODE_WRITE))
if (nfs_have_write_delegation(inode))
return 1;
if (!flctx || (list_empty_careful(&flctx->flc_flock) &&
list_empty_careful(&flctx->flc_posix)))

2
include/linux/nfs_xdr.h
View File

@ -1830,7 +1830,7 @@ struct nfs_rpc_ops {
int open_flags,
struct iattr *iattr,
int *);
int (*have_delegation)(struct inode *, fmode_t);
int (*have_delegation)(struct inode *, fmode_t, int);
struct nfs_client *(*alloc_client) (const struct nfs_client_initdata *);
struct nfs_client *(*init_client) (struct nfs_client *,
const struct nfs_client_initdata *);