diff options
Diffstat (limited to 'fs/nfsd/nfs4proc.c')
| -rw-r--r-- | fs/nfsd/nfs4proc.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index 5e0dc528a0e8..cdeb3cfd6f32 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -1013,6 +1013,49 @@ nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, return status; } +static __be32 +nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, + struct nfsd4_seek *seek) +{ + int whence; + __be32 status; + struct file *file; + + status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate, + &seek->seek_stateid, + RD_STATE, &file); + if (status) { + dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n"); + return status; + } + + switch (seek->seek_whence) { + case NFS4_CONTENT_DATA: + whence = SEEK_DATA; + break; + case NFS4_CONTENT_HOLE: + whence = SEEK_HOLE; + break; + default: + status = nfserr_union_notsupp; + goto out; + } + + /* + * Note: This call does change file->f_pos, but nothing in NFSD + * should ever file->f_pos. + */ + seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence); + if (seek->seek_pos < 0) + status = nfserrno(seek->seek_pos); + else if (seek->seek_pos >= i_size_read(file_inode(file))) + seek->seek_eof = true; + +out: + fput(file); + return status; +} + /* This routine never returns NFS_OK! If there are no other errors, it * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the * attributes matched. VERIFY is implemented by mapping NFSERR_SAME @@ -1881,6 +1924,12 @@ static struct nfsd4_operation nfsd4_ops[] = { .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid, .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, }, + + /* NFSv4.2 operations */ + [OP_SEEK] = { + .op_func = (nfsd4op_func)nfsd4_seek, + .op_name = "OP_SEEK", + }, }; int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op) |