Return-Path: linux-nfs-owner@vger.kernel.org Received: from mx12.netapp.com ([216.240.18.77]:33032 "EHLO mx12.netapp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756767AbaJXOmk (ORCPT ); Fri, 24 Oct 2014 10:42:40 -0400 From: Anna Schumaker To: , Subject: [PATCH v2 2/2] nfs: Add DEALLOCATE support Date: Fri, 24 Oct 2014 10:42:13 -0400 Message-ID: <1414161733-26726-3-git-send-email-Anna.Schumaker@Netapp.com> In-Reply-To: <1414161733-26726-1-git-send-email-Anna.Schumaker@Netapp.com> References: <1414161733-26726-1-git-send-email-Anna.Schumaker@Netapp.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-nfs-owner@vger.kernel.org List-ID: This patch adds support for using the NFS v4.2 operation DEALLOCATE to punch holes in a file. Signed-off-by: Anna Schumaker --- fs/nfs/nfs42.h | 1 + fs/nfs/nfs42proc.c | 46 ++++++++++++++++++++++++++++++++ fs/nfs/nfs42xdr.c | 68 +++++++++++++++++++++++++++++++++++++++++++++++ fs/nfs/nfs4file.c | 7 +++-- fs/nfs/nfs4proc.c | 1 + fs/nfs/nfs4xdr.c | 1 + include/linux/nfs4.h | 1 + include/linux/nfs_fs_sb.h | 1 + include/linux/nfs_xdr.h | 14 ++++++++++ 9 files changed, 138 insertions(+), 2 deletions(-) diff --git a/fs/nfs/nfs42.h b/fs/nfs/nfs42.h index 42656a9..7afb894 100644 --- a/fs/nfs/nfs42.h +++ b/fs/nfs/nfs42.h @@ -7,6 +7,7 @@ /* nfs4.2proc.c */ int nfs42_proc_allocate(struct file *, loff_t, loff_t); +int nfs42_proc_deallocate(struct file *, loff_t, loff_t); loff_t nfs42_proc_llseek(struct file *, loff_t, int); /* nfs4.2xdr.h */ diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c index 44e0c7b..9613362 100644 --- a/fs/nfs/nfs42proc.c +++ b/fs/nfs/nfs42proc.c @@ -78,6 +78,52 @@ int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len) return err; } +int _nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len) +{ + struct nfs42_deallocate_args args = { + .dealloc_fh = NFS_FH(file_inode(filep)), + .dealloc_offset = offset, + .dealloc_length = len, + }; + struct nfs42_deallocate_res res; + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE], + .rpc_argp = &args, + .rpc_resp = &res, + }; + struct nfs_server *server = NFS_SERVER(file_inode(filep)); + int status; + + status = nfs42_set_rw_stateid(&args.dealloc_stateid, filep, FMODE_WRITE); + if (status) + return status; + + return nfs4_call_sync(server->client, server, &msg, + &args.seq_args, &res.seq_res, 0); +} + +int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len) +{ + struct inode *inode = file_inode(filep); + struct nfs_server *server = NFS_SERVER(inode); + struct nfs4_exception exception = { }; + int err; + + if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE)) + return -EOPNOTSUPP; + + do { + err = _nfs42_proc_deallocate(filep, offset, len); + if (err == -ENOTSUPP) { + server->caps &= ~NFS_CAP_DEALLOCATE; + return -EOPNOTSUPP; + } + err = nfs4_handle_exception(server, err, &exception); + } while (exception.retry); + + return err; +} + loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence) { struct inode *inode = file_inode(filep); diff --git a/fs/nfs/nfs42xdr.c b/fs/nfs/nfs42xdr.c index 9506f5a..5db9dad 100644 --- a/fs/nfs/nfs42xdr.c +++ b/fs/nfs/nfs42xdr.c @@ -9,6 +9,11 @@ 2 /* offest */ + \ 2 /* length */) #define decode_allocate_maxsz (op_decode_hdr_maxsz) +#define encode_deallocate_maxsz (op_encode_hdr_maxsz + \ + XDR_QUADLEN(NFS4_STATEID_SIZE) + \ + 2 /* offest */ + \ + 2 /* length */) +#define decode_deallocate_maxsz (op_decode_hdr_maxsz) #define encode_seek_maxsz (op_encode_hdr_maxsz + \ encode_stateid_maxsz + \ 2 /* offset */ + \ @@ -25,6 +30,12 @@ #define NFS4_dec_allocate_sz (compound_decode_hdr_maxsz + \ decode_putfh_maxsz + \ decode_allocate_maxsz) +#define NFS4_enc_deallocate_sz (compound_encode_hdr_maxsz + \ + encode_putfh_maxsz + \ + encode_deallocate_maxsz) +#define NFS4_dec_deallocate_sz (compound_decode_hdr_maxsz + \ + decode_putfh_maxsz + \ + decode_deallocate_maxsz) #define NFS4_enc_seek_sz (compound_encode_hdr_maxsz + \ encode_putfh_maxsz + \ encode_seek_maxsz) @@ -43,6 +54,16 @@ static void encode_allocate(struct xdr_stream *xdr, encode_uint64(xdr, args->alloc_length); } +static void encode_deallocate(struct xdr_stream *xdr, + struct nfs42_deallocate_args *args, + struct compound_hdr *hdr) +{ + encode_op_hdr(xdr, OP_DEALLOCATE, decode_deallocate_maxsz, hdr); + encode_nfs4_stateid(xdr, &args->dealloc_stateid); + encode_uint64(xdr, args->dealloc_offset); + encode_uint64(xdr, args->dealloc_length); +} + static void encode_seek(struct xdr_stream *xdr, struct nfs42_seek_args *args, struct compound_hdr *hdr) @@ -72,6 +93,24 @@ static void nfs4_xdr_enc_allocate(struct rpc_rqst *req, } /* + * Encode DEALLOCATE request + */ +static void nfs4_xdr_enc_deallocate(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs42_deallocate_args *args) +{ + struct compound_hdr hdr = { + .minorversion = nfs4_xdr_minorversion(&args->seq_args), + }; + + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->dealloc_fh, &hdr); + encode_deallocate(xdr, args, &hdr); + encode_nops(&hdr); +} + +/* * Encode SEEK request */ static void nfs4_xdr_enc_seek(struct rpc_rqst *req, @@ -94,6 +133,11 @@ static int decode_allocate(struct xdr_stream *xdr, struct nfs42_allocate_res *re return decode_op_hdr(xdr, OP_ALLOCATE); } +static int decode_deallocate(struct xdr_stream *xdr, struct nfs42_deallocate_res *res) +{ + return decode_op_hdr(xdr, OP_DEALLOCATE); +} + static int decode_seek(struct xdr_stream *xdr, struct nfs42_seek_res *res) { int status; @@ -141,6 +185,30 @@ out: } /* + * Decode DEALLOCATE request + */ +static int nfs4_xdr_dec_deallocate(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + struct nfs42_deallocate_res *res) +{ + struct compound_hdr hdr; + int status; + + status = decode_compound_hdr(xdr, &hdr); + if (status) + goto out; + status = decode_sequence(xdr, &res->seq_res, rqstp); + if (status) + goto out; + status = decode_putfh(xdr); + if (status) + goto out; + status = decode_deallocate(xdr, res); +out: + return status; +} + +/* * Decode SEEK request */ static int nfs4_xdr_dec_seek(struct rpc_rqst *rqstp, diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c index 6256957..1b2d82d 100644 --- a/fs/nfs/nfs4file.c +++ b/fs/nfs/nfs4file.c @@ -142,11 +142,14 @@ static long nfs42_fallocate(struct file *filep, int mode, loff_t offset, loff_t struct inode *inode = file_inode(filep); long ret; - if (mode != 0) + if ((mode != 0) && (mode != (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE))) return -EOPNOTSUPP; mutex_lock(&inode->i_mutex); - ret = nfs42_proc_allocate(filep, offset, len); + if (mode & FALLOC_FL_PUNCH_HOLE) + ret = nfs42_proc_deallocate(filep, offset, len); + else + ret = nfs42_proc_allocate(filep, offset, len); mutex_unlock(&inode->i_mutex); return ret; } diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 65a3859..cb5dd74 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -8432,6 +8432,7 @@ static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = { | NFS_CAP_STATEID_NFSV41 | NFS_CAP_ATOMIC_OPEN_V1 | NFS_CAP_ALLOCATE + | NFS_CAP_DEALLOCATE | NFS_CAP_SEEK, .init_client = nfs41_init_client, .shutdown_client = nfs41_shutdown_client, diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index 0a14845..03d0fa6 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -7395,6 +7395,7 @@ struct rpc_procinfo nfs4_procedures[] = { #ifdef CONFIG_NFS_V4_2 PROC(SEEK, enc_seek, dec_seek), PROC(ALLOCATE, enc_allocate, dec_allocate), + PROC(DEALLOCATE, enc_deallocate, dec_deallocate), #endif /* CONFIG_NFS_V4_2 */ }; diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h index 2b28a21..022b761 100644 --- a/include/linux/nfs4.h +++ b/include/linux/nfs4.h @@ -491,6 +491,7 @@ enum { /* nfs42 */ NFSPROC4_CLNT_SEEK, NFSPROC4_CLNT_ALLOCATE, + NFSPROC4_CLNT_DEALLOCATE, }; /* nfs41 types */ diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h index df6ed42..1e37fbb 100644 --- a/include/linux/nfs_fs_sb.h +++ b/include/linux/nfs_fs_sb.h @@ -232,5 +232,6 @@ struct nfs_server { #define NFS_CAP_SECURITY_LABEL (1U << 18) #define NFS_CAP_SEEK (1U << 19) #define NFS_CAP_ALLOCATE (1U << 20) +#define NFS_CAP_DEALLOCATE (1U << 21) #endif diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h index f3fc647..9098e51 100644 --- a/include/linux/nfs_xdr.h +++ b/include/linux/nfs_xdr.h @@ -1246,6 +1246,20 @@ struct nfs42_allocate_res { unsigned int status; }; +struct nfs42_deallocate_args { + struct nfs4_sequence_args seq_args; + + struct nfs_fh *dealloc_fh; + nfs4_stateid dealloc_stateid; + u64 dealloc_offset; + u64 dealloc_length; +}; + +struct nfs42_deallocate_res { + struct nfs4_sequence_res seq_res; + unsigned int status; +}; + struct nfs42_seek_args { struct nfs4_sequence_args seq_args; -- 2.1.2