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nfsd: Add ALLOCATE support

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The ALLOCATE operation is used to preallocate space in a file.  I can do
this by using vfs_fallocate() to do the actual preallocation.

ALLOCATE only returns a status indicator, so we don't need to write a
special encode() function.

Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Anna Schumaker
2014-11-07 14:44:26 -05:00
committed by J. Bruce Fields
parent 72c72bdf7b
commit 95d871f03c
5 changed files with 85 additions and 1 deletions
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36
fs/nfsd/nfs4proc.c
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@@ -1013,6 +1013,36 @@ nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
return status;
}
static __be32
nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_fallocate *fallocate, int flags)
{
__be32 status = nfserr_notsupp;
struct file *file;
status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate,
&fallocate->falloc_stateid,
WR_STATE, &file);
if (status != nfs_ok) {
dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
return status;
}
status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file,
fallocate->falloc_offset,
fallocate->falloc_length,
flags);
fput(file);
return status;
}
static __be32
nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_fallocate *fallocate)
{
return nfsd4_fallocate(rqstp, cstate, fallocate, 0);
}
static __be32
nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_seek *seek)
@@ -1929,6 +1959,12 @@ static struct nfsd4_operation nfsd4_ops[] = {
},
/* NFSv4.2 operations */
[OP_ALLOCATE] = {
.op_func = (nfsd4op_func)nfsd4_allocate,
.op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
.op_name = "OP_ALLOCATE",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
},
[OP_SEEK] = {
.op_func = (nfsd4op_func)nfsd4_seek,
.op_name = "OP_SEEK",