[v2,10/10] NFSD add nfs4 inter ssc to nfsd4_copy

Message ID	20181130200348.59524-11-olga.kornievskaia@gmail.com (mailing list archive)
State	New, archived
Headers	show Return-Path: <linux-fsdevel-owner@kernel.org> From: Olga Kornievskaia <olga.kornievskaia@gmail.com> To: bfields@redhat.com Cc: linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: [PATCH v2 10/10] NFSD add nfs4 inter ssc to nfsd4_copy Date: Fri, 30 Nov 2018 15:03:48 -0500 Message-Id: <20181130200348.59524-11-olga.kornievskaia@gmail.com> In-Reply-To: <20181130200348.59524-1-olga.kornievskaia@gmail.com> References: <20181130200348.59524-1-olga.kornievskaia@gmail.com> Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk
Series	server-side support for "inter" SSC copy \| expand [v2,00/10] server-side support for "inter" SSC copy [v2,01/10] VFS generic copy_file_range() support [v2,02/10] NFS fallback to generic_copy_file_range [v2,03/10] NFSD fill-in netloc4 structure [v2,04/10] NFSD add ca_source_server<> to COPY [v2,05/10] NFSD return nfs4_stid in nfs4_preprocess_stateid_op [v2,06/10] NFSD add COPY_NOTIFY operation [v2,07/10] NFSD check stateids against copy stateids [v2,08/10] NFSD generalize nfsd4_compound_state flag names [v2,09/10] NFSD: allow inter server COPY to have a STALE source server fh [v2,10/10] NFSD add nfs4 inter ssc to nfsd4_copy

diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index 2e28254..238c4b7 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -1155,6 +1155,209 @@ void nfsd4_shutdown_copy(struct nfs4_client *clp) while ((copy = nfsd4_get_copy(clp)) != NULL) nfsd4_stop_copy(copy); } +#ifdef CONFIG_NFSD_V4_2_INTER_SSC + +extern struct file *nfs42_ssc_open(struct vfsmount *ss_mnt, + struct nfs_fh *src_fh, + nfs4_stateid *stateid); +extern void nfs42_ssc_close(struct file *filep); + +extern void nfs_sb_deactive(struct super_block *sb); + +#define NFSD42_INTERSSC_MOUNTOPS "minorversion=2,vers=4,addr=%s" + +/** + * Support one copy source server for now. + */ +static __be32 +nfsd4_interssc_connect(struct nl4_server *nss, struct svc_rqst *rqstp, + struct vfsmount **mount) +{ + struct file_system_type *type; + struct vfsmount *ss_mnt; + struct nfs42_netaddr *naddr; + struct sockaddr_storage tmp_addr; + size_t tmp_addrlen, match_netid_len = 3; + char *startsep = "", *endsep = "", *match_netid = "tcp"; + char *ipaddr, *dev_name, *raw_data; + int len, raw_len, status = -EINVAL; + + naddr = &nss->u.nl4_addr; + tmp_addrlen = rpc_uaddr2sockaddr(SVC_NET(rqstp), naddr->addr, + naddr->addr_len, + (struct sockaddr *)&tmp_addr, + sizeof(tmp_addr)); + if (tmp_addrlen == 0) + goto out_err; + + if (tmp_addr.ss_family == AF_INET6) { + startsep = "["; + endsep = "]"; + match_netid = "tcp6"; + match_netid_len = 4; + } + + if (naddr->netid_len != match_netid_len || + strncmp(naddr->netid, match_netid, naddr->netid_len)) + goto out_err; + + /* Construct the raw data for the vfs_kern_mount call */ + len = RPC_MAX_ADDRBUFLEN + 1; + ipaddr = kzalloc(len, GFP_KERNEL); + if (!ipaddr) + goto out_err; + + rpc_ntop((struct sockaddr *)&tmp_addr, ipaddr, len); + + /* 2 for ipv6 endsep and startsep. 3 for ":/" and trailing '/0'*/ + + raw_len = strlen(NFSD42_INTERSSC_MOUNTOPS) + strlen(ipaddr); + raw_data = kzalloc(raw_len, GFP_KERNEL); + if (!raw_data) + goto out_free_ipaddr; + + snprintf(raw_data, raw_len, NFSD42_INTERSSC_MOUNTOPS, ipaddr); + + status = -ENODEV; + type = get_fs_type("nfs"); + if (!type) + goto out_free_rawdata; + + /* Set the server:<export> for the vfs_kern_mount call */ + dev_name = kzalloc(len + 5, GFP_KERNEL); + if (!dev_name) + goto out_free_rawdata; + snprintf(dev_name, len + 5, "%s%s%s:/", startsep, ipaddr, endsep); + + /* Use an 'internal' mount: MS_KERNMOUNT -> MNT_INTERNAL */ + ss_mnt = vfs_kern_mount(type, MS_KERNMOUNT, dev_name, raw_data); + module_put(type->owner); + if (IS_ERR(ss_mnt)) + goto out_free_devname; + + status = 0; + *mount = ss_mnt; + +out_free_devname: + kfree(dev_name); +out_free_rawdata: + kfree(raw_data); +out_free_ipaddr: + kfree(ipaddr); +out_err: + return status; +} + +static void +nfsd4_interssc_disconnect(struct vfsmount *ss_mnt) +{ + nfs_sb_deactive(ss_mnt->mnt_sb); + mntput(ss_mnt); +} + +/** + * nfsd4_setup_inter_ssc + * + * Verify COPY destination stateid. + * Connect to the source server with NFSv4.1. + * Create the source struct file for nfsd_copy_range. + * Called with COPY cstate: + * SAVED_FH: source filehandle + * CURRENT_FH: destination filehandle + * + * Returns errno (not nfserrxxx) + */ +static __be32 +nfsd4_setup_inter_ssc(struct svc_rqst *rqstp, + struct nfsd4_compound_state *cstate, + struct nfsd4_copy *copy, struct vfsmount **mount) +{ + struct svc_fh *s_fh = NULL; + stateid_t *s_stid = &copy->cp_src_stateid; + __be32 status = -EINVAL; + + /* Verify the destination stateid and set dst struct file*/ + status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, + &copy->cp_dst_stateid, + WR_STATE, &copy->file_dst, NULL, + NULL); + if (status) + goto out; + + status = nfsd4_interssc_connect(&copy->cp_src, rqstp, mount); + if (status) + goto out; + + s_fh = &cstate->save_fh; + + copy->c_fh.size = s_fh->fh_handle.fh_size; + memcpy(copy->c_fh.data, &s_fh->fh_handle.fh_base, copy->c_fh.size); + copy->stateid.seqid = s_stid->si_generation; + memcpy(copy->stateid.other, (void *)&s_stid->si_opaque, + sizeof(stateid_opaque_t)); + + status = 0; +out: + return status; +} + +static void +nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct file *src, + struct file *dst) +{ + nfs42_ssc_close(src); + fput(src); + fput(dst); + mntput(ss_mnt); +} + +#else /* CONFIG_NFSD_V4_2_INTER_SSC */ + +static __be32 +nfsd4_setup_inter_ssc(struct svc_rqst *rqstp, + struct nfsd4_compound_state *cstate, + struct nfsd4_copy *copy, + struct vfs_mount **mount) +{ + *mount = NULL; + return -EINVAL; +} + +static void +nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct file *src, + struct file *dst) +{ +} + +static void +nfsd4_interssc_disconnect(struct vfsmount *ss_mnt) +{ +} + +static struct file *nfs42_ssc_open(struct vfsmount *ss_mnt, + struct nfs_fh *src_fh, + nfs4_stateid *stateid) +{ + return NULL; +} +#endif /* CONFIG_NFSD_V4_2_INTER_SSC */ + +static __be32 +nfsd4_setup_intra_ssc(struct svc_rqst *rqstp, + struct nfsd4_compound_state *cstate, + struct nfsd4_copy *copy) +{ + return nfsd4_verify_copy(rqstp, cstate, &copy->cp_src_stateid, + &copy->file_src, &copy->cp_dst_stateid, + &copy->file_dst, NULL); +} + +static void +nfsd4_cleanup_intra_ssc(struct file *src, struct file *dst) +{ + fput(src); + fput(dst); +} static void nfsd4_cb_offload_release(struct nfsd4_callback *cb) { @@ -1219,12 +1422,16 @@ static __be32 nfsd4_do_copy(struct nfsd4_copy *copy, bool sync) status = nfs_ok; } - fput(copy->file_src); - fput(copy->file_dst); + if (!copy->cp_intra) /* Inter server SSC */ + nfsd4_cleanup_inter_ssc(copy->ss_mnt, copy->file_src, + copy->file_dst); + else + nfsd4_cleanup_intra_ssc(copy->file_src, copy->file_dst); + return status; } -static void dup_copy_fields(struct nfsd4_copy *src, struct nfsd4_copy *dst) +static int dup_copy_fields(struct nfsd4_copy *src, struct nfsd4_copy *dst) { dst->cp_src_pos = src->cp_src_pos; dst->cp_dst_pos = src->cp_dst_pos; @@ -1234,8 +1441,17 @@ static void dup_copy_fields(struct nfsd4_copy *src, struct nfsd4_copy *dst) memcpy(&dst->fh, &src->fh, sizeof(src->fh)); dst->cp_clp = src->cp_clp; dst->file_dst = get_file(src->file_dst); - dst->file_src = get_file(src->file_src); + dst->cp_intra = src->cp_intra; + if (src->cp_intra) /* for inter, file_src doesn't exist yet */ + dst->file_src = get_file(src->file_src); memcpy(&dst->cp_stateid, &src->cp_stateid, sizeof(src->cp_stateid)); + memcpy(&dst->cp_src, &src->cp_src, sizeof(struct nl4_server)); + memcpy(&dst->stateid, &src->stateid, sizeof(src->stateid)); + memcpy(&dst->c_fh, &src->c_fh, sizeof(src->c_fh)); + dst->ss_mnt = src->ss_mnt; + + return 0; + } static void cleanup_async_copy(struct nfsd4_copy *copy) @@ -1254,7 +1470,18 @@ static int nfsd4_do_async_copy(void *data) struct nfsd4_copy *copy = (struct nfsd4_copy *)data; struct nfsd4_copy *cb_copy; + if (!copy->cp_intra) { /* Inter server SSC */ + copy->file_src = nfs42_ssc_open(copy->ss_mnt, &copy->c_fh, + &copy->stateid); + if (IS_ERR(copy->file_src)) { + copy->nfserr = nfserr_offload_denied; + nfsd4_interssc_disconnect(copy->ss_mnt); + goto do_callback; + } + } + copy->nfserr = nfsd4_do_copy(copy, 0); +do_callback: cb_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL); if (!cb_copy) goto out; @@ -1278,11 +1505,20 @@ static int nfsd4_do_async_copy(void *data) __be32 status; struct nfsd4_copy *async_copy = NULL; - status = nfsd4_verify_copy(rqstp, cstate, &copy->cp_src_stateid, - &copy->file_src, &copy->cp_dst_stateid, - &copy->file_dst, NULL); - if (status) - goto out; + if (!copy->cp_intra) { /* Inter server SSC */ + if (!inter_copy_offload_enable || copy->cp_synchronous) { + status = nfserr_notsupp; + goto out; + } + status = nfsd4_setup_inter_ssc(rqstp, cstate, copy, + &copy->ss_mnt); + if (status) + return nfserr_offload_denied; + } else { + status = nfsd4_setup_intra_ssc(rqstp, cstate, copy); + if (status) + return status; + } copy->cp_clp = cstate->clp; memcpy(&copy->fh, &cstate->current_fh.fh_handle, @@ -1293,15 +1529,15 @@ static int nfsd4_do_async_copy(void *data) status = nfserrno(-ENOMEM); async_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL); if (!async_copy) - goto out; - if (!nfs4_init_copy_state(nn, copy)) { - kfree(async_copy); - goto out; - } + goto out_err; + if (!nfs4_init_copy_state(nn, copy)) + goto out_err; refcount_set(&async_copy->refcount, 1); memcpy(&copy->cp_res.cb_stateid, &copy->cp_stateid, sizeof(copy->cp_stateid)); - dup_copy_fields(copy, async_copy); + status = dup_copy_fields(copy, async_copy); + if (status) + goto out_err; async_copy->copy_task = kthread_create(nfsd4_do_async_copy, async_copy, "%s", "copy thread"); if (IS_ERR(async_copy->copy_task)) @@ -1312,13 +1548,17 @@ static int nfsd4_do_async_copy(void *data) spin_unlock(&async_copy->cp_clp->async_lock); wake_up_process(async_copy->copy_task); status = nfs_ok; - } else + } else { status = nfsd4_do_copy(copy, 1); + } out: return status; out_err: cleanup_async_copy(async_copy); - goto out; + status = nfserrno(-ENOMEM); + if (!copy->cp_intra) + nfsd4_interssc_disconnect(copy->ss_mnt); + goto out_err; } struct nfsd4_copy * diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c index 89cb484..9d254e7 100644 --- a/fs/nfsd/nfssvc.c +++ b/fs/nfsd/nfssvc.c @@ -30,6 +30,12 @@ #define NFSDDBG_FACILITY NFSDDBG_SVC +bool inter_copy_offload_enable; +EXPORT_SYMBOL_GPL(inter_copy_offload_enable); +module_param(inter_copy_offload_enable, bool, 0644); +MODULE_PARM_DESC(inter_copy_offload_enable, + "Enable inter server to server copy offload. Default: false"); + extern struct svc_program nfsd_program; static int nfsd(void *vrqstp); diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h index fbd18d6..bb2f8e5 100644 --- a/fs/nfsd/xdr4.h +++ b/fs/nfsd/xdr4.h @@ -547,7 +547,12 @@ struct nfsd4_copy { struct task_struct *copy_task; refcount_t refcount; bool stopped; + + struct vfsmount *ss_mnt; + struct nfs_fh c_fh; + nfs4_stateid stateid; }; +extern bool inter_copy_offload_enable; struct nfsd4_seek { /* request */ diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h index 9e49a6c..fa4b411 100644 --- a/include/linux/nfs4.h +++ b/include/linux/nfs4.h @@ -17,6 +17,7 @@ #include <linux/uidgid.h> #include <uapi/linux/nfs4.h> #include <linux/sunrpc/msg_prot.h> +#include <linux/nfs.h> enum nfs4_acl_whotype { NFS4_ACL_WHO_NAMED = 0,

[v2,10/10] NFSD add nfs4 inter ssc to nfsd4_copy

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