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nfsd: don't break lease on CLAIM_DELEGATE_CUR 

CLAIM_DELEGATE_CUR is used in response to a broken lease; allowing it
to break the lease and return EAGAIN leaves the client unable to make
progress in returning the delegation

nfs4_get_vfs_file() now takes struct nfsd4_open for access to the
claim type, and calls nfsd_open() with NFSD_MAY_NOT_BREAK_LEASE when
claim type is CLAIM_DELEGATE_CUR

Signed-off-by: Casey Bodley <cbodley@citi.umich.edu>
Cc: stable@kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Casey Bodley 2011-07-23 14:58:10 -04:00 коммит произвёл J. Bruce Fields
Родитель 8fb47a4fbf
Коммит 0c12eaffdf
1 изменённых файлов: 12 добавлений и 6 удалений
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18
fs/nfsd/nfs4state.c
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@ -2585,12 +2585,18 @@ static inline int nfs4_access_to_access(u32 nfs4_access)
return flags;
}
static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file
*fp, struct svc_fh *cur_fh, u32 nfs4_access)
static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp,
struct svc_fh *cur_fh, struct nfsd4_open *open)
{
__be32 status;
int oflag = nfs4_access_to_omode(nfs4_access);
int access = nfs4_access_to_access(nfs4_access);
int oflag = nfs4_access_to_omode(open->op_share_access);
int access = nfs4_access_to_access(open->op_share_access);
/* CLAIM_DELEGATE_CUR is used in response to a broken lease;
* allowing it to break the lease and return EAGAIN leaves the
* client unable to make progress in returning the delegation */
if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
access |= NFSD_MAY_NOT_BREAK_LEASE;
if (!fp->fi_fds[oflag]) {
status = nfsd_open(rqstp, cur_fh, S_IFREG, access,
@ -2615,7 +2621,7 @@ nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp,
if (stp == NULL)
return nfserr_resource;
status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open->op_share_access);
status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open);
if (status) {
kmem_cache_free(stateid_slab, stp);
return status;
@ -2648,7 +2654,7 @@ nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, struct svc_fh *c
new_access = !test_bit(op_share_access, &stp->st_access_bmap);
if (new_access) {
status = nfs4_get_vfs_file(rqstp, fp, cur_fh, op_share_access);
status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open);
if (status)
return status;
}