* [PATCH v3] NFS: Add v4.2 SEEK support @ 2014-09-26 17:58 Anna Schumaker 2014-09-26 17:58 ` [PATCH v3] NFS: Implement SEEK Anna Schumaker 0 siblings, 1 reply; 4+ messages in thread From: Anna Schumaker @ 2014-09-26 17:58 UTC (permalink / raw) To: Trond.Myklebust, linux-nfs This patch adds support for the NFS v4.2 operation SEEK. I add this operation to new NFS v4.2 XDR and proc files to help ease the maintenance burden on new operations. Changes in v3: - Rename nfs42xdr.h -> nfs42xdr.c - Use nfs_v4_2_minor_ops to set up initial capabilities - Do more work in nfs42proc.c (check capabilities, find correct stateids ...) This patch and the corresponding server changes are available in the [seek] branch of: git://git.linux-nfs.org/projects/anna/linux-nfs.git Questions? Comments? Thoughts? Anna Anna Schumaker (1): NFS: Implement SEEK fs/nfs/Makefile | 1 + fs/nfs/inode.c | 2 + fs/nfs/nfs42.h | 14 +++++++ fs/nfs/nfs42proc.c | 69 +++++++++++++++++++++++++++++++++ fs/nfs/nfs42xdr.c | 98 +++++++++++++++++++++++++++++++++++++++++++++++ fs/nfs/nfs4_fs.h | 3 ++ fs/nfs/nfs4file.c | 25 ++++++++++++ fs/nfs/nfs4proc.c | 4 +- fs/nfs/nfs4xdr.c | 7 ++++ include/linux/nfs4.h | 3 ++ include/linux/nfs_fs_sb.h | 1 + include/linux/nfs_xdr.h | 19 +++++++++ 12 files changed, 244 insertions(+), 2 deletions(-) create mode 100644 fs/nfs/nfs42.h create mode 100644 fs/nfs/nfs42proc.c create mode 100644 fs/nfs/nfs42xdr.c -- 2.1.0 ^ permalink raw reply [flat|nested] 4+ messages in thread
* [PATCH v3] NFS: Implement SEEK 2014-09-26 17:58 [PATCH v3] NFS: Add v4.2 SEEK support Anna Schumaker @ 2014-09-26 17:58 ` Anna Schumaker 2014-10-22 19:50 ` Anna Schumaker 0 siblings, 1 reply; 4+ messages in thread From: Anna Schumaker @ 2014-09-26 17:58 UTC (permalink / raw) To: Trond.Myklebust, linux-nfs From: Anna Schumaker <Anna.Schumaker@netapp.com> The SEEK operation is used when an application makes an lseek call with either the SEEK_HOLE or SEEK_DATA flags set. I fall back on nfs_file_llseek() if the server does not have SEEK support. Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> --- fs/nfs/Makefile | 1 + fs/nfs/inode.c | 2 + fs/nfs/nfs42.h | 14 +++++++ fs/nfs/nfs42proc.c | 69 +++++++++++++++++++++++++++++++++ fs/nfs/nfs42xdr.c | 98 +++++++++++++++++++++++++++++++++++++++++++++++ fs/nfs/nfs4_fs.h | 3 ++ fs/nfs/nfs4file.c | 25 ++++++++++++ fs/nfs/nfs4proc.c | 4 +- fs/nfs/nfs4xdr.c | 7 ++++ include/linux/nfs4.h | 3 ++ include/linux/nfs_fs_sb.h | 1 + include/linux/nfs_xdr.h | 19 +++++++++ 12 files changed, 244 insertions(+), 2 deletions(-) create mode 100644 fs/nfs/nfs42.h create mode 100644 fs/nfs/nfs42proc.c create mode 100644 fs/nfs/nfs42xdr.c diff --git a/fs/nfs/Makefile b/fs/nfs/Makefile index 4782e08..04cb830 100644 --- a/fs/nfs/Makefile +++ b/fs/nfs/Makefile @@ -28,6 +28,7 @@ nfsv4-y := nfs4proc.o nfs4xdr.o nfs4state.o nfs4renewd.o nfs4super.o nfs4file.o nfsv4-$(CONFIG_NFS_USE_LEGACY_DNS) += cache_lib.o nfsv4-$(CONFIG_SYSCTL) += nfs4sysctl.o nfsv4-$(CONFIG_NFS_V4_1) += pnfs.o pnfs_dev.o +nfsv4-$(CONFIG_NFS_V4_2) += nfs42proc.o obj-$(CONFIG_PNFS_FILE_LAYOUT) += filelayout/ obj-$(CONFIG_PNFS_OBJLAYOUT) += objlayout/ diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c index 141c9f4..6388a59 100644 --- a/fs/nfs/inode.c +++ b/fs/nfs/inode.c @@ -718,6 +718,7 @@ struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) kfree(new); return res; } +EXPORT_SYMBOL_GPL(nfs_get_lock_context); void nfs_put_lock_context(struct nfs_lock_context *l_ctx) { @@ -730,6 +731,7 @@ void nfs_put_lock_context(struct nfs_lock_context *l_ctx) spin_unlock(&inode->i_lock); kfree(l_ctx); } +EXPORT_SYMBOL_GPL(nfs_put_lock_context); /** * nfs_close_context - Common close_context() routine NFSv2/v3 diff --git a/fs/nfs/nfs42.h b/fs/nfs/nfs42.h new file mode 100644 index 0000000..d10333a --- /dev/null +++ b/fs/nfs/nfs42.h @@ -0,0 +1,14 @@ +/* + * Copyright (c) 2014 Anna Schumaker <Anna.Schumaker@Netapp.com> + */ + +#ifndef __LINUX_FS_NFS_NFS4_2_H +#define __LINUX_FS_NFS_NFS4_2_H + +/* nfs4.2proc.c */ +loff_t nfs42_proc_llseek(struct file *, loff_t, int); + +/* nfs4.2xdr.h */ +extern struct rpc_procinfo nfs4_2_procedures[]; + +#endif /* __LINUX_FS_NFS_NFS4_2_H */ diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c new file mode 100644 index 0000000..0886f1d --- /dev/null +++ b/fs/nfs/nfs42proc.c @@ -0,0 +1,69 @@ +/* + * Copyright (c) 2014 Anna Schumaker <Anna.Schumaker@Netapp.com> + */ +#include <linux/fs.h> +#include <linux/sunrpc/sched.h> +#include <linux/nfs.h> +#include <linux/nfs3.h> +#include <linux/nfs4.h> +#include <linux/nfs_xdr.h> +#include <linux/nfs_fs.h> +#include "nfs4_fs.h" +#include "nfs42.h" + +static int nfs42_set_rw_stateid(nfs4_stateid *dst, struct file *file, + fmode_t fmode) +{ + struct nfs_open_context *open; + struct nfs_lock_context *lock; + int ret; + + open = get_nfs_open_context(nfs_file_open_context(file)); + lock = nfs_get_lock_context(open); + if (IS_ERR(lock)) { + put_nfs_open_context(open); + return PTR_ERR(lock); + } + + ret = nfs4_set_rw_stateid(dst, open, lock, fmode); + + nfs_put_lock_context(lock); + put_nfs_open_context(open); + return ret; +} + +loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence) +{ + struct inode *inode = file_inode(filep); + struct nfs42_seek_args args = { + .sa_fh = NFS_FH(inode), + .sa_offset = offset, + .sa_what = (whence == SEEK_HOLE) ? + NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA, + }; + struct nfs42_seek_res res; + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK], + .rpc_argp = &args, + .rpc_resp = &res, + }; + struct nfs_server *server = NFS_SERVER(inode); + int status; + + if (!(server->caps & NFS_CAP_SEEK)) + return -ENOTSUPP; + + status = nfs42_set_rw_stateid(&args.sa_stateid, filep, FMODE_READ); + if (status) + return status; + + nfs_wb_all(inode); + status = nfs4_call_sync(server->client, server, &msg, + &args.seq_args, &res.seq_res, 0); + if (status == -ENOTSUPP) + server->caps &= ~NFS_CAP_SEEK; + if (status) + return status; + + return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes); +} diff --git a/fs/nfs/nfs42xdr.c b/fs/nfs/nfs42xdr.c new file mode 100644 index 0000000..c90469b --- /dev/null +++ b/fs/nfs/nfs42xdr.c @@ -0,0 +1,98 @@ +/* + * Copyright (c) 2014 Anna Schumaker <Anna.Schumaker@Netapp.com> + */ +#ifndef __LINUX_FS_NFS_NFS4_2XDR_H +#define __LINUX_FS_NFS_NFS4_2XDR_H + +#define encode_seek_maxsz (op_encode_hdr_maxsz + \ + encode_stateid_maxsz + \ + 2 /* offset */ + \ + 1 /* whence */) +#define decode_seek_maxsz (op_decode_hdr_maxsz + \ + 1 /* eof */ + \ + 1 /* whence */ + \ + 2 /* offset */ + \ + 2 /* length */) + +#define NFS4_enc_seek_sz (compound_encode_hdr_maxsz + \ + encode_putfh_maxsz + \ + encode_seek_maxsz) +#define NFS4_dec_seek_sz (compound_decode_hdr_maxsz + \ + decode_putfh_maxsz + \ + decode_seek_maxsz) + + +static void encode_seek(struct xdr_stream *xdr, + struct nfs42_seek_args *args, + struct compound_hdr *hdr) +{ + encode_op_hdr(xdr, OP_SEEK, decode_seek_maxsz, hdr); + encode_nfs4_stateid(xdr, &args->sa_stateid); + encode_uint64(xdr, args->sa_offset); + encode_uint32(xdr, args->sa_what); +} + +/* + * Encode SEEK request + */ +static void nfs4_xdr_enc_seek(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs42_seek_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->sa_fh, &hdr); + encode_seek(xdr, args, &hdr); + encode_nops(&hdr); +} + +static int decode_seek(struct xdr_stream *xdr, struct nfs42_seek_res *res) +{ + int status; + __be32 *p; + + status = decode_op_hdr(xdr, OP_SEEK); + if (status) + return status; + + p = xdr_inline_decode(xdr, 4 + 8); + if (unlikely(!p)) + goto out_overflow; + + res->sr_eof = be32_to_cpup(p++); + p = xdr_decode_hyper(p, &res->sr_offset); + return 0; + +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +/* + * Decode SEEK request + */ +static int nfs4_xdr_dec_seek(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + struct nfs42_seek_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_seek(xdr, res); +out: + return status; +} +#endif /* __LINUX_FS_NFS_NFS4_2XDR_H */ diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h index a8b855a..be6cac3 100644 --- a/fs/nfs/nfs4_fs.h +++ b/fs/nfs/nfs4_fs.h @@ -226,6 +226,9 @@ int nfs4_replace_transport(struct nfs_server *server, const struct nfs4_fs_locations *locations); /* nfs4proc.c */ +extern int nfs4_call_sync(struct rpc_clnt *, struct nfs_server *, + struct rpc_message *, struct nfs4_sequence_args *, + struct nfs4_sequence_res *, int); extern int nfs4_proc_setclientid(struct nfs_client *, u32, unsigned short, struct rpc_cred *, struct nfs4_setclientid_res *); extern int nfs4_proc_setclientid_confirm(struct nfs_client *, struct nfs4_setclientid_res *arg, struct rpc_cred *); extern int nfs4_proc_get_rootfh(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *, bool); diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c index a816f06..4dffa3a 100644 --- a/fs/nfs/nfs4file.c +++ b/fs/nfs/nfs4file.c @@ -8,6 +8,10 @@ #include "fscache.h" #include "pnfs.h" +#ifdef CONFIG_NFS_V4_2 +#include "nfs42.h" +#endif + #define NFSDBG_FACILITY NFSDBG_FILE static int @@ -115,8 +119,29 @@ nfs4_file_fsync(struct file *file, loff_t start, loff_t end, int datasync) return ret; } +#ifdef CONFIG_NFS_V4_2 +static loff_t nfs4_file_llseek(struct file *filep, loff_t offset, int whence) +{ + loff_t ret; + + switch (whence) { + case SEEK_HOLE: + case SEEK_DATA: + ret = nfs42_proc_llseek(filep, offset, whence); + if (ret != -ENOTSUPP) + return ret; + default: + return nfs_file_llseek(filep, offset, whence); + } +} +#endif /* CONFIG_NFS_V4_2 */ + const struct file_operations nfs4_file_operations = { +#ifdef CONFIG_NFS_V4_2 + .llseek = nfs4_file_llseek, +#else .llseek = nfs_file_llseek, +#endif .read = new_sync_read, .write = new_sync_write, .read_iter = nfs_file_read, diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 549d3b0..ba5eda3 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -885,7 +885,6 @@ static int nfs4_call_sync_sequence(struct rpc_clnt *clnt, return ret; } -static int nfs4_call_sync(struct rpc_clnt *clnt, struct nfs_server *server, struct rpc_message *msg, @@ -8431,7 +8430,8 @@ static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = { | NFS_CAP_CHANGE_ATTR | NFS_CAP_POSIX_LOCK | NFS_CAP_STATEID_NFSV41 - | NFS_CAP_ATOMIC_OPEN_V1, + | NFS_CAP_ATOMIC_OPEN_V1 + | NFS_CAP_SEEK, .init_client = nfs41_init_client, .shutdown_client = nfs41_shutdown_client, .match_stateid = nfs41_match_stateid, diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index 005d03c..206c08a 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -7321,6 +7321,10 @@ nfs4_stat_to_errno(int stat) return -stat; } +#ifdef CONFIG_NFS_V4_2 +#include "nfs42xdr.c" +#endif /* CONFIG_NFS_V4_2 */ + #define PROC(proc, argtype, restype) \ [NFSPROC4_CLNT_##proc] = { \ .p_proc = NFSPROC4_COMPOUND, \ @@ -7388,6 +7392,9 @@ struct rpc_procinfo nfs4_procedures[] = { enc_bind_conn_to_session, dec_bind_conn_to_session), PROC(DESTROY_CLIENTID, enc_destroy_clientid, dec_destroy_clientid), #endif /* CONFIG_NFS_V4_1 */ +#ifdef CONFIG_NFS_V4_2 + PROC(SEEK, enc_seek, dec_seek), +#endif /* CONFIG_NFS_V4_2 */ }; const struct rpc_version nfs_version4 = { diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h index 026b0c0..356acc2 100644 --- a/include/linux/nfs4.h +++ b/include/linux/nfs4.h @@ -487,6 +487,9 @@ enum { NFSPROC4_CLNT_GETDEVICELIST, NFSPROC4_CLNT_BIND_CONN_TO_SESSION, NFSPROC4_CLNT_DESTROY_CLIENTID, + + /* nfs42 */ + NFSPROC4_CLNT_SEEK, }; /* nfs41 types */ diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h index 922be2e..a32ba0d 100644 --- a/include/linux/nfs_fs_sb.h +++ b/include/linux/nfs_fs_sb.h @@ -230,5 +230,6 @@ struct nfs_server { #define NFS_CAP_STATEID_NFSV41 (1U << 16) #define NFS_CAP_ATOMIC_OPEN_V1 (1U << 17) #define NFS_CAP_SECURITY_LABEL (1U << 18) +#define NFS_CAP_SEEK (1U << 19) #endif diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h index 6951c7d..983876f 100644 --- a/include/linux/nfs_xdr.h +++ b/include/linux/nfs_xdr.h @@ -1231,6 +1231,25 @@ struct pnfs_ds_commit_info { #endif /* CONFIG_NFS_V4_1 */ +#ifdef CONFIG_NFS_V4_2 +struct nfs42_seek_args { + struct nfs4_sequence_args seq_args; + + struct nfs_fh *sa_fh; + nfs4_stateid sa_stateid; + u64 sa_offset; + u32 sa_what; +}; + +struct nfs42_seek_res { + struct nfs4_sequence_res seq_res; + unsigned int status; + + u32 sr_eof; + u64 sr_offset; +}; +#endif + struct nfs_page; #define NFS_PAGEVEC_SIZE (8U) -- 2.1.0 ^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH v3] NFS: Implement SEEK 2014-09-26 17:58 ` [PATCH v3] NFS: Implement SEEK Anna Schumaker @ 2014-10-22 19:50 ` Anna Schumaker 2014-10-23 7:36 ` Christoph Hellwig 0 siblings, 1 reply; 4+ messages in thread From: Anna Schumaker @ 2014-10-22 19:50 UTC (permalink / raw) To: Anna Schumaker, Trond.Myklebust, linux-nfs On 09/26/14 13:58, Anna Schumaker wrote: > From: Anna Schumaker <Anna.Schumaker@netapp.com> > > The SEEK operation is used when an application makes an lseek call with > either the SEEK_HOLE or SEEK_DATA flags set. I fall back on > nfs_file_llseek() if the server does not have SEEK support. > > Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> > --- > fs/nfs/Makefile | 1 + > fs/nfs/inode.c | 2 + > fs/nfs/nfs42.h | 14 +++++++ > fs/nfs/nfs42proc.c | 69 +++++++++++++++++++++++++++++++++ > fs/nfs/nfs42xdr.c | 98 +++++++++++++++++++++++++++++++++++++++++++++++ > fs/nfs/nfs4_fs.h | 3 ++ > fs/nfs/nfs4file.c | 25 ++++++++++++ > fs/nfs/nfs4proc.c | 4 +- > fs/nfs/nfs4xdr.c | 7 ++++ > include/linux/nfs4.h | 3 ++ > include/linux/nfs_fs_sb.h | 1 + > include/linux/nfs_xdr.h | 19 +++++++++ > 12 files changed, 244 insertions(+), 2 deletions(-) > create mode 100644 fs/nfs/nfs42.h > create mode 100644 fs/nfs/nfs42proc.c > create mode 100644 fs/nfs/nfs42xdr.c > > diff --git a/fs/nfs/Makefile b/fs/nfs/Makefile > index 4782e08..04cb830 100644 > --- a/fs/nfs/Makefile > +++ b/fs/nfs/Makefile > @@ -28,6 +28,7 @@ nfsv4-y := nfs4proc.o nfs4xdr.o nfs4state.o nfs4renewd.o nfs4super.o nfs4file.o > nfsv4-$(CONFIG_NFS_USE_LEGACY_DNS) += cache_lib.o > nfsv4-$(CONFIG_SYSCTL) += nfs4sysctl.o > nfsv4-$(CONFIG_NFS_V4_1) += pnfs.o pnfs_dev.o > +nfsv4-$(CONFIG_NFS_V4_2) += nfs42proc.o > > obj-$(CONFIG_PNFS_FILE_LAYOUT) += filelayout/ > obj-$(CONFIG_PNFS_OBJLAYOUT) += objlayout/ > diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c > index 141c9f4..6388a59 100644 > --- a/fs/nfs/inode.c > +++ b/fs/nfs/inode.c > @@ -718,6 +718,7 @@ struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) > kfree(new); > return res; > } > +EXPORT_SYMBOL_GPL(nfs_get_lock_context); > > void nfs_put_lock_context(struct nfs_lock_context *l_ctx) > { > @@ -730,6 +731,7 @@ void nfs_put_lock_context(struct nfs_lock_context *l_ctx) > spin_unlock(&inode->i_lock); > kfree(l_ctx); > } > +EXPORT_SYMBOL_GPL(nfs_put_lock_context); > > /** > * nfs_close_context - Common close_context() routine NFSv2/v3 > diff --git a/fs/nfs/nfs42.h b/fs/nfs/nfs42.h > new file mode 100644 > index 0000000..d10333a > --- /dev/null > +++ b/fs/nfs/nfs42.h > @@ -0,0 +1,14 @@ > +/* > + * Copyright (c) 2014 Anna Schumaker <Anna.Schumaker@Netapp.com> > + */ > + > +#ifndef __LINUX_FS_NFS_NFS4_2_H > +#define __LINUX_FS_NFS_NFS4_2_H > + > +/* nfs4.2proc.c */ > +loff_t nfs42_proc_llseek(struct file *, loff_t, int); > + > +/* nfs4.2xdr.h */ > +extern struct rpc_procinfo nfs4_2_procedures[]; > + > +#endif /* __LINUX_FS_NFS_NFS4_2_H */ > diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c > new file mode 100644 > index 0000000..0886f1d > --- /dev/null > +++ b/fs/nfs/nfs42proc.c > @@ -0,0 +1,69 @@ > +/* > + * Copyright (c) 2014 Anna Schumaker <Anna.Schumaker@Netapp.com> > + */ > +#include <linux/fs.h> > +#include <linux/sunrpc/sched.h> > +#include <linux/nfs.h> > +#include <linux/nfs3.h> > +#include <linux/nfs4.h> > +#include <linux/nfs_xdr.h> > +#include <linux/nfs_fs.h> > +#include "nfs4_fs.h" > +#include "nfs42.h" > + > +static int nfs42_set_rw_stateid(nfs4_stateid *dst, struct file *file, > + fmode_t fmode) > +{ > + struct nfs_open_context *open; > + struct nfs_lock_context *lock; > + int ret; > + > + open = get_nfs_open_context(nfs_file_open_context(file)); > + lock = nfs_get_lock_context(open); > + if (IS_ERR(lock)) { > + put_nfs_open_context(open); > + return PTR_ERR(lock); > + } > + > + ret = nfs4_set_rw_stateid(dst, open, lock, fmode); > + > + nfs_put_lock_context(lock); > + put_nfs_open_context(open); > + return ret; > +} > + > +loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence) > +{ > + struct inode *inode = file_inode(filep); > + struct nfs42_seek_args args = { > + .sa_fh = NFS_FH(inode), > + .sa_offset = offset, > + .sa_what = (whence == SEEK_HOLE) ? > + NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA, > + }; > + struct nfs42_seek_res res; > + struct rpc_message msg = { > + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK], > + .rpc_argp = &args, > + .rpc_resp = &res, > + }; > + struct nfs_server *server = NFS_SERVER(inode); > + int status; > + > + if (!(server->caps & NFS_CAP_SEEK)) > + return -ENOTSUPP; > + > + status = nfs42_set_rw_stateid(&args.sa_stateid, filep, FMODE_READ); > + if (status) > + return status; > + > + nfs_wb_all(inode); > + status = nfs4_call_sync(server->client, server, &msg, > + &args.seq_args, &res.seq_res, 0); > + if (status == -ENOTSUPP) > + server->caps &= ~NFS_CAP_SEEK; > + if (status) > + return status; > + > + return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes); > +} > diff --git a/fs/nfs/nfs42xdr.c b/fs/nfs/nfs42xdr.c > new file mode 100644 > index 0000000..c90469b > --- /dev/null > +++ b/fs/nfs/nfs42xdr.c > @@ -0,0 +1,98 @@ > +/* > + * Copyright (c) 2014 Anna Schumaker <Anna.Schumaker@Netapp.com> > + */ > +#ifndef __LINUX_FS_NFS_NFS4_2XDR_H > +#define __LINUX_FS_NFS_NFS4_2XDR_H > + > +#define encode_seek_maxsz (op_encode_hdr_maxsz + \ > + encode_stateid_maxsz + \ > + 2 /* offset */ + \ > + 1 /* whence */) > +#define decode_seek_maxsz (op_decode_hdr_maxsz + \ > + 1 /* eof */ + \ > + 1 /* whence */ + \ > + 2 /* offset */ + \ > + 2 /* length */) > + > +#define NFS4_enc_seek_sz (compound_encode_hdr_maxsz + \ > + encode_putfh_maxsz + \ > + encode_seek_maxsz) > +#define NFS4_dec_seek_sz (compound_decode_hdr_maxsz + \ > + decode_putfh_maxsz + \ > + decode_seek_maxsz) > + > + > +static void encode_seek(struct xdr_stream *xdr, > + struct nfs42_seek_args *args, > + struct compound_hdr *hdr) > +{ > + encode_op_hdr(xdr, OP_SEEK, decode_seek_maxsz, hdr); > + encode_nfs4_stateid(xdr, &args->sa_stateid); > + encode_uint64(xdr, args->sa_offset); > + encode_uint32(xdr, args->sa_what); > +} > + > +/* > + * Encode SEEK request > + */ > +static void nfs4_xdr_enc_seek(struct rpc_rqst *req, > + struct xdr_stream *xdr, > + struct nfs42_seek_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->sa_fh, &hdr); > + encode_seek(xdr, args, &hdr); > + encode_nops(&hdr); > +} > + > +static int decode_seek(struct xdr_stream *xdr, struct nfs42_seek_res *res) > +{ > + int status; > + __be32 *p; > + > + status = decode_op_hdr(xdr, OP_SEEK); > + if (status) > + return status; > + > + p = xdr_inline_decode(xdr, 4 + 8); > + if (unlikely(!p)) > + goto out_overflow; > + > + res->sr_eof = be32_to_cpup(p++); > + p = xdr_decode_hyper(p, &res->sr_offset); > + return 0; > + > +out_overflow: > + print_overflow_msg(__func__, xdr); > + return -EIO; > +} > + > +/* > + * Decode SEEK request > + */ > +static int nfs4_xdr_dec_seek(struct rpc_rqst *rqstp, > + struct xdr_stream *xdr, > + struct nfs42_seek_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_seek(xdr, res); > +out: > + return status; > +} > +#endif /* __LINUX_FS_NFS_NFS4_2XDR_H */ > diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h > index a8b855a..be6cac3 100644 > --- a/fs/nfs/nfs4_fs.h > +++ b/fs/nfs/nfs4_fs.h > @@ -226,6 +226,9 @@ int nfs4_replace_transport(struct nfs_server *server, > const struct nfs4_fs_locations *locations); > > /* nfs4proc.c */ > +extern int nfs4_call_sync(struct rpc_clnt *, struct nfs_server *, > + struct rpc_message *, struct nfs4_sequence_args *, > + struct nfs4_sequence_res *, int); > extern int nfs4_proc_setclientid(struct nfs_client *, u32, unsigned short, struct rpc_cred *, struct nfs4_setclientid_res *); > extern int nfs4_proc_setclientid_confirm(struct nfs_client *, struct nfs4_setclientid_res *arg, struct rpc_cred *); > extern int nfs4_proc_get_rootfh(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *, bool); > diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c > index a816f06..4dffa3a 100644 > --- a/fs/nfs/nfs4file.c > +++ b/fs/nfs/nfs4file.c > @@ -8,6 +8,10 @@ > #include "fscache.h" > #include "pnfs.h" > > +#ifdef CONFIG_NFS_V4_2 > +#include "nfs42.h" > +#endif > + > #define NFSDBG_FACILITY NFSDBG_FILE > > static int > @@ -115,8 +119,29 @@ nfs4_file_fsync(struct file *file, loff_t start, loff_t end, int datasync) > return ret; > } > > +#ifdef CONFIG_NFS_V4_2 > +static loff_t nfs4_file_llseek(struct file *filep, loff_t offset, int whence) > +{ > + loff_t ret; > + > + switch (whence) { > + case SEEK_HOLE: > + case SEEK_DATA: > + ret = nfs42_proc_llseek(filep, offset, whence); > + if (ret != -ENOTSUPP) > + return ret; > + default: > + return nfs_file_llseek(filep, offset, whence); > + } > +} > +#endif /* CONFIG_NFS_V4_2 */ > + > const struct file_operations nfs4_file_operations = { > +#ifdef CONFIG_NFS_V4_2 > + .llseek = nfs4_file_llseek, > +#else > .llseek = nfs_file_llseek, > +#endif > .read = new_sync_read, > .write = new_sync_write, > .read_iter = nfs_file_read, > diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c > index 549d3b0..ba5eda3 100644 > --- a/fs/nfs/nfs4proc.c > +++ b/fs/nfs/nfs4proc.c > @@ -885,7 +885,6 @@ static int nfs4_call_sync_sequence(struct rpc_clnt *clnt, > return ret; > } > > -static > int nfs4_call_sync(struct rpc_clnt *clnt, > struct nfs_server *server, > struct rpc_message *msg, > @@ -8431,7 +8430,8 @@ static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = { > | NFS_CAP_CHANGE_ATTR > | NFS_CAP_POSIX_LOCK > | NFS_CAP_STATEID_NFSV41 > - | NFS_CAP_ATOMIC_OPEN_V1, > + | NFS_CAP_ATOMIC_OPEN_V1 > + | NFS_CAP_SEEK, This looks like it really does add the capability to nfs_v4_2_minor_ops, so I'm not sure how it ended up modifying nfs_v4_1_minor_ops instead. Anyway, I just posted a fix to set the flag in the right place. Anna > .init_client = nfs41_init_client, > .shutdown_client = nfs41_shutdown_client, > .match_stateid = nfs41_match_stateid, > diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c > index 005d03c..206c08a 100644 > --- a/fs/nfs/nfs4xdr.c > +++ b/fs/nfs/nfs4xdr.c > @@ -7321,6 +7321,10 @@ nfs4_stat_to_errno(int stat) > return -stat; > } > > +#ifdef CONFIG_NFS_V4_2 > +#include "nfs42xdr.c" > +#endif /* CONFIG_NFS_V4_2 */ > + > #define PROC(proc, argtype, restype) \ > [NFSPROC4_CLNT_##proc] = { \ > .p_proc = NFSPROC4_COMPOUND, \ > @@ -7388,6 +7392,9 @@ struct rpc_procinfo nfs4_procedures[] = { > enc_bind_conn_to_session, dec_bind_conn_to_session), > PROC(DESTROY_CLIENTID, enc_destroy_clientid, dec_destroy_clientid), > #endif /* CONFIG_NFS_V4_1 */ > +#ifdef CONFIG_NFS_V4_2 > + PROC(SEEK, enc_seek, dec_seek), > +#endif /* CONFIG_NFS_V4_2 */ > }; > > const struct rpc_version nfs_version4 = { > diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h > index 026b0c0..356acc2 100644 > --- a/include/linux/nfs4.h > +++ b/include/linux/nfs4.h > @@ -487,6 +487,9 @@ enum { > NFSPROC4_CLNT_GETDEVICELIST, > NFSPROC4_CLNT_BIND_CONN_TO_SESSION, > NFSPROC4_CLNT_DESTROY_CLIENTID, > + > + /* nfs42 */ > + NFSPROC4_CLNT_SEEK, > }; > > /* nfs41 types */ > diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h > index 922be2e..a32ba0d 100644 > --- a/include/linux/nfs_fs_sb.h > +++ b/include/linux/nfs_fs_sb.h > @@ -230,5 +230,6 @@ struct nfs_server { > #define NFS_CAP_STATEID_NFSV41 (1U << 16) > #define NFS_CAP_ATOMIC_OPEN_V1 (1U << 17) > #define NFS_CAP_SECURITY_LABEL (1U << 18) > +#define NFS_CAP_SEEK (1U << 19) > > #endif > diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h > index 6951c7d..983876f 100644 > --- a/include/linux/nfs_xdr.h > +++ b/include/linux/nfs_xdr.h > @@ -1231,6 +1231,25 @@ struct pnfs_ds_commit_info { > > #endif /* CONFIG_NFS_V4_1 */ > > +#ifdef CONFIG_NFS_V4_2 > +struct nfs42_seek_args { > + struct nfs4_sequence_args seq_args; > + > + struct nfs_fh *sa_fh; > + nfs4_stateid sa_stateid; > + u64 sa_offset; > + u32 sa_what; > +}; > + > +struct nfs42_seek_res { > + struct nfs4_sequence_res seq_res; > + unsigned int status; > + > + u32 sr_eof; > + u64 sr_offset; > +}; > +#endif > + > struct nfs_page; > > #define NFS_PAGEVEC_SIZE (8U) ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH v3] NFS: Implement SEEK 2014-10-22 19:50 ` Anna Schumaker @ 2014-10-23 7:36 ` Christoph Hellwig 0 siblings, 0 replies; 4+ messages in thread From: Christoph Hellwig @ 2014-10-23 7:36 UTC (permalink / raw) To: Anna Schumaker; +Cc: Trond.Myklebust, linux-nfs On Wed, Oct 22, 2014 at 03:50:15PM -0400, Anna Schumaker wrote: > > int nfs4_call_sync(struct rpc_clnt *clnt, > > struct nfs_server *server, > > struct rpc_message *msg, > > @@ -8431,7 +8430,8 @@ static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = { > > | NFS_CAP_CHANGE_ATTR > > | NFS_CAP_POSIX_LOCK > > | NFS_CAP_STATEID_NFSV41 > > - | NFS_CAP_ATOMIC_OPEN_V1, > > + | NFS_CAP_ATOMIC_OPEN_V1 > > + | NFS_CAP_SEEK, > > This looks like it really does add the capability to nfs_v4_2_minor_ops, so I'm not sure how it ended up modifying nfs_v4_1_minor_ops instead. Anyway, I just posted a fix to set the flag in the right place. Given that the caps were the same before this is something that patch can easily do when applying patches with a fuzz. ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2014-10-23 7:36 UTC | newest] Thread overview: 4+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2014-09-26 17:58 [PATCH v3] NFS: Add v4.2 SEEK support Anna Schumaker 2014-09-26 17:58 ` [PATCH v3] NFS: Implement SEEK Anna Schumaker 2014-10-22 19:50 ` Anna Schumaker 2014-10-23 7:36 ` Christoph Hellwig
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