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Diffstat (limited to 'fs/nfsd/nfs4proc.c')
-rw-r--r--fs/nfsd/nfs4proc.c302
1 files changed, 302 insertions, 0 deletions
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index ac71d13c69ef..2b91443497cc 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -43,6 +43,7 @@
#include "current_stateid.h"
#include "netns.h"
#include "acl.h"
+#include "pnfs.h"
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
#include <linux/security.h>
@@ -1178,6 +1179,252 @@ nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
return status == nfserr_same ? nfs_ok : status;
}
+#ifdef CONFIG_NFSD_PNFS
+static const struct nfsd4_layout_ops *
+nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
+{
+ if (!exp->ex_layout_type) {
+ dprintk("%s: export does not support pNFS\n", __func__);
+ return NULL;
+ }
+
+ if (exp->ex_layout_type != layout_type) {
+ dprintk("%s: layout type %d not supported\n",
+ __func__, layout_type);
+ return NULL;
+ }
+
+ return nfsd4_layout_ops[layout_type];
+}
+
+static __be32
+nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
+ struct nfsd4_compound_state *cstate,
+ struct nfsd4_getdeviceinfo *gdp)
+{
+ const struct nfsd4_layout_ops *ops;
+ struct nfsd4_deviceid_map *map;
+ struct svc_export *exp;
+ __be32 nfserr;
+
+ dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
+ __func__,
+ gdp->gd_layout_type,
+ gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
+ gdp->gd_maxcount);
+
+ map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
+ if (!map) {
+ dprintk("%s: couldn't find device ID to export mapping!\n",
+ __func__);
+ return nfserr_noent;
+ }
+
+ exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
+ if (IS_ERR(exp)) {
+ dprintk("%s: could not find device id\n", __func__);
+ return nfserr_noent;
+ }
+
+ nfserr = nfserr_layoutunavailable;
+ ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
+ if (!ops)
+ goto out;
+
+ nfserr = nfs_ok;
+ if (gdp->gd_maxcount != 0)
+ nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb, gdp);
+
+ gdp->gd_notify_types &= ops->notify_types;
+ exp_put(exp);
+out:
+ return nfserr;
+}
+
+static __be32
+nfsd4_layoutget(struct svc_rqst *rqstp,
+ struct nfsd4_compound_state *cstate,
+ struct nfsd4_layoutget *lgp)
+{
+ struct svc_fh *current_fh = &cstate->current_fh;
+ const struct nfsd4_layout_ops *ops;
+ struct nfs4_layout_stateid *ls;
+ __be32 nfserr;
+ int accmode;
+
+ switch (lgp->lg_seg.iomode) {
+ case IOMODE_READ:
+ accmode = NFSD_MAY_READ;
+ break;
+ case IOMODE_RW:
+ accmode = NFSD_MAY_READ | NFSD_MAY_WRITE;
+ break;
+ default:
+ dprintk("%s: invalid iomode %d\n",
+ __func__, lgp->lg_seg.iomode);
+ nfserr = nfserr_badiomode;
+ goto out;
+ }
+
+ nfserr = fh_verify(rqstp, current_fh, 0, accmode);
+ if (nfserr)
+ goto out;
+
+ nfserr = nfserr_layoutunavailable;
+ ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
+ if (!ops)
+ goto out;
+
+ /*
+ * Verify minlength and range as per RFC5661:
+ * o If loga_length is less than loga_minlength,
+ * the metadata server MUST return NFS4ERR_INVAL.
+ * o If the sum of loga_offset and loga_minlength exceeds
+ * NFS4_UINT64_MAX, and loga_minlength is not
+ * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
+ * o If the sum of loga_offset and loga_length exceeds
+ * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
+ * the error NFS4ERR_INVAL MUST result.
+ */
+ nfserr = nfserr_inval;
+ if (lgp->lg_seg.length < lgp->lg_minlength ||
+ (lgp->lg_minlength != NFS4_MAX_UINT64 &&
+ lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
+ (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
+ lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
+ goto out;
+ if (lgp->lg_seg.length == 0)
+ goto out;
+
+ nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
+ true, lgp->lg_layout_type, &ls);
+ if (nfserr)
+ goto out;
+
+ nfserr = ops->proc_layoutget(current_fh->fh_dentry->d_inode,
+ current_fh, lgp);
+ if (nfserr)
+ goto out_put_stid;
+
+ nfserr = nfsd4_insert_layout(lgp, ls);
+
+out_put_stid:
+ nfs4_put_stid(&ls->ls_stid);
+out:
+ return nfserr;
+}
+
+static __be32
+nfsd4_layoutcommit(struct svc_rqst *rqstp,
+ struct nfsd4_compound_state *cstate,
+ struct nfsd4_layoutcommit *lcp)
+{
+ const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
+ struct svc_fh *current_fh = &cstate->current_fh;
+ const struct nfsd4_layout_ops *ops;
+ loff_t new_size = lcp->lc_last_wr + 1;
+ struct inode *inode;
+ struct nfs4_layout_stateid *ls;
+ __be32 nfserr;
+
+ nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
+ if (nfserr)
+ goto out;
+
+ nfserr = nfserr_layoutunavailable;
+ ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
+ if (!ops)
+ goto out;
+ inode = current_fh->fh_dentry->d_inode;
+
+ nfserr = nfserr_inval;
+ if (new_size <= seg->offset) {
+ dprintk("pnfsd: last write before layout segment\n");
+ goto out;
+ }
+ if (new_size > seg->offset + seg->length) {
+ dprintk("pnfsd: last write beyond layout segment\n");
+ goto out;
+ }
+ if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
+ dprintk("pnfsd: layoutcommit beyond EOF\n");
+ goto out;
+ }
+
+ nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
+ false, lcp->lc_layout_type,
+ &ls);
+ if (nfserr) {
+ /* fixup error code as per RFC5661 */
+ if (nfserr == nfserr_bad_stateid)
+ nfserr = nfserr_badlayout;
+ goto out;
+ }
+
+ nfserr = ops->proc_layoutcommit(inode, lcp);
+ if (nfserr)
+ goto out_put_stid;
+
+ if (new_size > i_size_read(inode)) {
+ lcp->lc_size_chg = 1;
+ lcp->lc_newsize = new_size;
+ } else {
+ lcp->lc_size_chg = 0;
+ }
+
+out_put_stid:
+ nfs4_put_stid(&ls->ls_stid);
+out:
+ return nfserr;
+}
+
+static __be32
+nfsd4_layoutreturn(struct svc_rqst *rqstp,
+ struct nfsd4_compound_state *cstate,
+ struct nfsd4_layoutreturn *lrp)
+{
+ struct svc_fh *current_fh = &cstate->current_fh;
+ __be32 nfserr;
+
+ nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
+ if (nfserr)
+ goto out;
+
+ nfserr = nfserr_layoutunavailable;
+ if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
+ goto out;
+
+ switch (lrp->lr_seg.iomode) {
+ case IOMODE_READ:
+ case IOMODE_RW:
+ case IOMODE_ANY:
+ break;
+ default:
+ dprintk("%s: invalid iomode %d\n", __func__,
+ lrp->lr_seg.iomode);
+ nfserr = nfserr_inval;
+ goto out;
+ }
+
+ switch (lrp->lr_return_type) {
+ case RETURN_FILE:
+ nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
+ break;
+ case RETURN_FSID:
+ case RETURN_ALL:
+ nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
+ break;
+ default:
+ dprintk("%s: invalid return_type %d\n", __func__,
+ lrp->lr_return_type);
+ nfserr = nfserr_inval;
+ break;
+ }
+out:
+ return nfserr;
+}
+#endif /* CONFIG_NFSD_PNFS */
+
/*
* NULL call.
*/
@@ -1679,6 +1926,36 @@ static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd
op_encode_channel_attrs_maxsz) * sizeof(__be32);
}
+#ifdef CONFIG_NFSD_PNFS
+/*
+ * At this stage we don't really know what layout driver will handle the request,
+ * so we need to define an arbitrary upper bound here.
+ */
+#define MAX_LAYOUT_SIZE 128
+static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+{
+ return (op_encode_hdr_size +
+ 1 /* logr_return_on_close */ +
+ op_encode_stateid_maxsz +
+ 1 /* nr of layouts */ +
+ MAX_LAYOUT_SIZE) * sizeof(__be32);
+}
+
+static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+{
+ return (op_encode_hdr_size +
+ 1 /* locr_newsize */ +
+ 2 /* ns_size */) * sizeof(__be32);
+}
+
+static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+{
+ return (op_encode_hdr_size +
+ 1 /* lrs_stateid */ +
+ op_encode_stateid_maxsz) * sizeof(__be32);
+}
+#endif /* CONFIG_NFSD_PNFS */
+
static struct nfsd4_operation nfsd4_ops[] = {
[OP_ACCESS] = {
.op_func = (nfsd4op_func)nfsd4_access,
@@ -1966,6 +2243,31 @@ static struct nfsd4_operation nfsd4_ops[] = {
.op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid,
.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
},
+#ifdef CONFIG_NFSD_PNFS
+ [OP_GETDEVICEINFO] = {
+ .op_func = (nfsd4op_func)nfsd4_getdeviceinfo,
+ .op_flags = ALLOWED_WITHOUT_FH,
+ .op_name = "OP_GETDEVICEINFO",
+ },
+ [OP_LAYOUTGET] = {
+ .op_func = (nfsd4op_func)nfsd4_layoutget,
+ .op_flags = OP_MODIFIES_SOMETHING,
+ .op_name = "OP_LAYOUTGET",
+ .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutget_rsize,
+ },
+ [OP_LAYOUTCOMMIT] = {
+ .op_func = (nfsd4op_func)nfsd4_layoutcommit,
+ .op_flags = OP_MODIFIES_SOMETHING,
+ .op_name = "OP_LAYOUTCOMMIT",
+ .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutcommit_rsize,
+ },
+ [OP_LAYOUTRETURN] = {
+ .op_func = (nfsd4op_func)nfsd4_layoutreturn,
+ .op_flags = OP_MODIFIES_SOMETHING,
+ .op_name = "OP_LAYOUTRETURN",
+ .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutreturn_rsize,
+ },
+#endif /* CONFIG_NFSD_PNFS */
/* NFSv4.2 operations */
[OP_ALLOCATE] = {
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-12-04 12:51:13 +0000