Return-Path: linux-nfs-owner@vger.kernel.org Received: from mx2.netapp.com ([216.240.18.37]:18610 "EHLO mx2.netapp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751261AbaKYSSW (ORCPT ); Tue, 25 Nov 2014 13:18:22 -0500 From: Anna Schumaker To: , Subject: [PATCH v5 2/2] nfs: Add DEALLOCATE support Date: Tue, 25 Nov 2014 13:18:16 -0500 Message-ID: <1416939496-27078-3-git-send-email-Anna.Schumaker@Netapp.com> In-Reply-To: <1416939496-27078-1-git-send-email-Anna.Schumaker@Netapp.com> References: <1416939496-27078-1-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 | 17 +++++++++++++ fs/nfs/nfs42xdr.c | 64 +++++++++++++++++++++++++++++++++++++++++++++++ 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 + 8 files changed, 91 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 de868e6..30c6bf5 100644 --- a/fs/nfs/nfs42proc.c +++ b/fs/nfs/nfs42proc.c @@ -90,6 +90,23 @@ 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 rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE], + }; + struct inode *inode = file_inode(filep); + int err; + + if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE)) + return -EOPNOTSUPP; + + err = nfs42_proc_fallocate(&msg, filep, offset, len); + if (err == -EOPNOTSUPP) + NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE; + 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 4248d03..038a7e1 100644 --- a/fs/nfs/nfs42xdr.c +++ b/fs/nfs/nfs42xdr.c @@ -10,6 +10,9 @@ #define encode_allocate_maxsz (op_encode_hdr_maxsz + \ encode_fallocate_maxsz) #define decode_allocate_maxsz (op_decode_hdr_maxsz) +#define encode_deallocate_maxsz (op_encode_hdr_maxsz + \ + encode_fallocate_maxsz) +#define decode_deallocate_maxsz (op_decode_hdr_maxsz) #define encode_seek_maxsz (op_encode_hdr_maxsz + \ encode_stateid_maxsz + \ 2 /* offset */ + \ @@ -26,6 +29,12 @@ #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) @@ -50,6 +59,14 @@ static void encode_allocate(struct xdr_stream *xdr, encode_fallocate(xdr, args); } +static void encode_deallocate(struct xdr_stream *xdr, + struct nfs42_falloc_args *args, + struct compound_hdr *hdr) +{ + encode_op_hdr(xdr, OP_DEALLOCATE, decode_deallocate_maxsz, hdr); + encode_fallocate(xdr, args); +} + static void encode_seek(struct xdr_stream *xdr, struct nfs42_seek_args *args, struct compound_hdr *hdr) @@ -79,6 +96,24 @@ 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_falloc_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->falloc_fh, &hdr); + encode_deallocate(xdr, args, &hdr); + encode_nops(&hdr); +} + +/* * Encode SEEK request */ static void nfs4_xdr_enc_seek(struct rpc_rqst *req, @@ -101,6 +136,11 @@ static int decode_allocate(struct xdr_stream *xdr, struct nfs42_falloc_res *res) return decode_op_hdr(xdr, OP_ALLOCATE); } +static int decode_deallocate(struct xdr_stream *xdr, struct nfs42_falloc_res *res) +{ + return decode_op_hdr(xdr, OP_DEALLOCATE); +} + static int decode_seek(struct xdr_stream *xdr, struct nfs42_seek_res *res) { int status; @@ -148,6 +188,30 @@ out: } /* + * Decode DEALLOCATE request + */ +static int nfs4_xdr_dec_deallocate(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + struct nfs42_falloc_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 f78e9fd..8b46389 100644 --- a/fs/nfs/nfs4file.c +++ b/fs/nfs/nfs4file.c @@ -145,7 +145,7 @@ static long nfs42_fallocate(struct file *filep, int mode, loff_t offset, loff_t if (!S_ISREG(inode->i_mode)) return -EOPNOTSUPP; - if (mode != 0) + if ((mode != 0) && (mode != (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE))) return -EOPNOTSUPP; ret = inode_newsize_ok(inode, offset + len); @@ -153,7 +153,10 @@ static long nfs42_fallocate(struct file *filep, int mode, loff_t offset, loff_t return ret; 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); nfs_zap_caches(inode); diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 7c31b33..2c4d1f7 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -8427,6 +8427,7 @@ 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 -- 2.1.3