Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/fs/nfs/callback_xdr.c b/fs/nfs/callback_xdr.c
new file mode 100644
index 0000000..d271df9
--- /dev/null
+++ b/fs/nfs/callback_xdr.c
@@ -0,0 +1,481 @@
+/*
+ * linux/fs/nfs/callback_xdr.c
+ *
+ * Copyright (C) 2004 Trond Myklebust
+ *
+ * NFSv4 callback encode/decode procedures
+ */
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/sunrpc/svc.h>
+#include <linux/nfs4.h>
+#include <linux/nfs_fs.h>
+#include "callback.h"
+
+#define CB_OP_TAGLEN_MAXSZ (512)
+#define CB_OP_HDR_RES_MAXSZ (2 + CB_OP_TAGLEN_MAXSZ)
+#define CB_OP_GETATTR_BITMAP_MAXSZ (4)
+#define CB_OP_GETATTR_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ + \
+ CB_OP_GETATTR_BITMAP_MAXSZ + \
+ 2 + 2 + 3 + 3)
+#define CB_OP_RECALL_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ)
+
+#define NFSDBG_FACILITY NFSDBG_CALLBACK
+
+typedef unsigned (*callback_process_op_t)(void *, void *);
+typedef unsigned (*callback_decode_arg_t)(struct svc_rqst *, struct xdr_stream *, void *);
+typedef unsigned (*callback_encode_res_t)(struct svc_rqst *, struct xdr_stream *, void *);
+
+
+struct callback_op {
+ callback_process_op_t process_op;
+ callback_decode_arg_t decode_args;
+ callback_encode_res_t encode_res;
+ long res_maxsize;
+};
+
+static struct callback_op callback_ops[];
+
+static int nfs4_callback_null(struct svc_rqst *rqstp, void *argp, void *resp)
+{
+ return htonl(NFS4_OK);
+}
+
+static int nfs4_decode_void(struct svc_rqst *rqstp, uint32_t *p, void *dummy)
+{
+ return xdr_argsize_check(rqstp, p);
+}
+
+static int nfs4_encode_void(struct svc_rqst *rqstp, uint32_t *p, void *dummy)
+{
+ return xdr_ressize_check(rqstp, p);
+}
+
+static uint32_t *read_buf(struct xdr_stream *xdr, int nbytes)
+{
+ uint32_t *p;
+
+ p = xdr_inline_decode(xdr, nbytes);
+ if (unlikely(p == NULL))
+ printk(KERN_WARNING "NFSv4 callback reply buffer overflowed!\n");
+ return p;
+}
+
+static unsigned decode_string(struct xdr_stream *xdr, unsigned int *len, const char **str)
+{
+ uint32_t *p;
+
+ p = read_buf(xdr, 4);
+ if (unlikely(p == NULL))
+ return htonl(NFS4ERR_RESOURCE);
+ *len = ntohl(*p);
+
+ if (*len != 0) {
+ p = read_buf(xdr, *len);
+ if (unlikely(p == NULL))
+ return htonl(NFS4ERR_RESOURCE);
+ *str = (const char *)p;
+ } else
+ *str = NULL;
+
+ return 0;
+}
+
+static unsigned decode_fh(struct xdr_stream *xdr, struct nfs_fh *fh)
+{
+ uint32_t *p;
+
+ p = read_buf(xdr, 4);
+ if (unlikely(p == NULL))
+ return htonl(NFS4ERR_RESOURCE);
+ fh->size = ntohl(*p);
+ if (fh->size > NFS4_FHSIZE)
+ return htonl(NFS4ERR_BADHANDLE);
+ p = read_buf(xdr, fh->size);
+ if (unlikely(p == NULL))
+ return htonl(NFS4ERR_RESOURCE);
+ memcpy(&fh->data[0], p, fh->size);
+ memset(&fh->data[fh->size], 0, sizeof(fh->data) - fh->size);
+ return 0;
+}
+
+static unsigned decode_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
+{
+ uint32_t *p;
+ unsigned int attrlen;
+
+ p = read_buf(xdr, 4);
+ if (unlikely(p == NULL))
+ return htonl(NFS4ERR_RESOURCE);
+ attrlen = ntohl(*p);
+ p = read_buf(xdr, attrlen << 2);
+ if (unlikely(p == NULL))
+ return htonl(NFS4ERR_RESOURCE);
+ if (likely(attrlen > 0))
+ bitmap[0] = ntohl(*p++);
+ if (attrlen > 1)
+ bitmap[1] = ntohl(*p);
+ return 0;
+}
+
+static unsigned decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
+{
+ uint32_t *p;
+
+ p = read_buf(xdr, 16);
+ if (unlikely(p == NULL))
+ return htonl(NFS4ERR_RESOURCE);
+ memcpy(stateid->data, p, 16);
+ return 0;
+}
+
+static unsigned decode_compound_hdr_arg(struct xdr_stream *xdr, struct cb_compound_hdr_arg *hdr)
+{
+ uint32_t *p;
+ unsigned int minor_version;
+ unsigned status;
+
+ status = decode_string(xdr, &hdr->taglen, &hdr->tag);
+ if (unlikely(status != 0))
+ return status;
+ /* We do not like overly long tags! */
+ if (hdr->taglen > CB_OP_TAGLEN_MAXSZ-12 || hdr->taglen < 0) {
+ printk("NFSv4 CALLBACK %s: client sent tag of length %u\n",
+ __FUNCTION__, hdr->taglen);
+ return htonl(NFS4ERR_RESOURCE);
+ }
+ p = read_buf(xdr, 12);
+ if (unlikely(p == NULL))
+ return htonl(NFS4ERR_RESOURCE);
+ minor_version = ntohl(*p++);
+ /* Check minor version is zero. */
+ if (minor_version != 0) {
+ printk(KERN_WARNING "%s: NFSv4 server callback with illegal minor version %u!\n",
+ __FUNCTION__, minor_version);
+ return htonl(NFS4ERR_MINOR_VERS_MISMATCH);
+ }
+ hdr->callback_ident = ntohl(*p++);
+ hdr->nops = ntohl(*p);
+ return 0;
+}
+
+static unsigned decode_op_hdr(struct xdr_stream *xdr, unsigned int *op)
+{
+ uint32_t *p;
+ p = read_buf(xdr, 4);
+ if (unlikely(p == NULL))
+ return htonl(NFS4ERR_RESOURCE);
+ *op = ntohl(*p);
+ return 0;
+}
+
+static unsigned decode_getattr_args(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct cb_getattrargs *args)
+{
+ unsigned status;
+
+ status = decode_fh(xdr, &args->fh);
+ if (unlikely(status != 0))
+ goto out;
+ args->addr = &rqstp->rq_addr;
+ status = decode_bitmap(xdr, args->bitmap);
+out:
+ dprintk("%s: exit with status = %d\n", __FUNCTION__, status);
+ return status;
+}
+
+static unsigned decode_recall_args(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct cb_recallargs *args)
+{
+ uint32_t *p;
+ unsigned status;
+
+ args->addr = &rqstp->rq_addr;
+ status = decode_stateid(xdr, &args->stateid);
+ if (unlikely(status != 0))
+ goto out;
+ p = read_buf(xdr, 4);
+ if (unlikely(p == NULL)) {
+ status = htonl(NFS4ERR_RESOURCE);
+ goto out;
+ }
+ args->truncate = ntohl(*p);
+ status = decode_fh(xdr, &args->fh);
+out:
+ dprintk("%s: exit with status = %d\n", __FUNCTION__, status);
+ return 0;
+}
+
+static unsigned encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
+{
+ uint32_t *p;
+
+ p = xdr_reserve_space(xdr, 4 + len);
+ if (unlikely(p == NULL))
+ return htonl(NFS4ERR_RESOURCE);
+ xdr_encode_opaque(p, str, len);
+ return 0;
+}
+
+#define CB_SUPPORTED_ATTR0 (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE)
+#define CB_SUPPORTED_ATTR1 (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY)
+static unsigned encode_attr_bitmap(struct xdr_stream *xdr, const uint32_t *bitmap, uint32_t **savep)
+{
+ uint32_t bm[2];
+ uint32_t *p;
+
+ bm[0] = htonl(bitmap[0] & CB_SUPPORTED_ATTR0);
+ bm[1] = htonl(bitmap[1] & CB_SUPPORTED_ATTR1);
+ if (bm[1] != 0) {
+ p = xdr_reserve_space(xdr, 16);
+ if (unlikely(p == NULL))
+ return htonl(NFS4ERR_RESOURCE);
+ *p++ = htonl(2);
+ *p++ = bm[0];
+ *p++ = bm[1];
+ } else if (bm[0] != 0) {
+ p = xdr_reserve_space(xdr, 12);
+ if (unlikely(p == NULL))
+ return htonl(NFS4ERR_RESOURCE);
+ *p++ = htonl(1);
+ *p++ = bm[0];
+ } else {
+ p = xdr_reserve_space(xdr, 8);
+ if (unlikely(p == NULL))
+ return htonl(NFS4ERR_RESOURCE);
+ *p++ = htonl(0);
+ }
+ *savep = p;
+ return 0;
+}
+
+static unsigned encode_attr_change(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t change)
+{
+ uint32_t *p;
+
+ if (!(bitmap[0] & FATTR4_WORD0_CHANGE))
+ return 0;
+ p = xdr_reserve_space(xdr, 8);
+ if (unlikely(p == 0))
+ return htonl(NFS4ERR_RESOURCE);
+ p = xdr_encode_hyper(p, change);
+ return 0;
+}
+
+static unsigned encode_attr_size(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t size)
+{
+ uint32_t *p;
+
+ if (!(bitmap[0] & FATTR4_WORD0_SIZE))
+ return 0;
+ p = xdr_reserve_space(xdr, 8);
+ if (unlikely(p == 0))
+ return htonl(NFS4ERR_RESOURCE);
+ p = xdr_encode_hyper(p, size);
+ return 0;
+}
+
+static unsigned encode_attr_time(struct xdr_stream *xdr, const struct timespec *time)
+{
+ uint32_t *p;
+
+ p = xdr_reserve_space(xdr, 12);
+ if (unlikely(p == 0))
+ return htonl(NFS4ERR_RESOURCE);
+ p = xdr_encode_hyper(p, time->tv_sec);
+ *p = htonl(time->tv_nsec);
+ return 0;
+}
+
+static unsigned encode_attr_ctime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time)
+{
+ if (!(bitmap[1] & FATTR4_WORD1_TIME_METADATA))
+ return 0;
+ return encode_attr_time(xdr,time);
+}
+
+static unsigned encode_attr_mtime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time)
+{
+ if (!(bitmap[1] & FATTR4_WORD1_TIME_MODIFY))
+ return 0;
+ return encode_attr_time(xdr,time);
+}
+
+static unsigned encode_compound_hdr_res(struct xdr_stream *xdr, struct cb_compound_hdr_res *hdr)
+{
+ unsigned status;
+
+ hdr->status = xdr_reserve_space(xdr, 4);
+ if (unlikely(hdr->status == NULL))
+ return htonl(NFS4ERR_RESOURCE);
+ status = encode_string(xdr, hdr->taglen, hdr->tag);
+ if (unlikely(status != 0))
+ return status;
+ hdr->nops = xdr_reserve_space(xdr, 4);
+ if (unlikely(hdr->nops == NULL))
+ return htonl(NFS4ERR_RESOURCE);
+ return 0;
+}
+
+static unsigned encode_op_hdr(struct xdr_stream *xdr, uint32_t op, uint32_t res)
+{
+ uint32_t *p;
+
+ p = xdr_reserve_space(xdr, 8);
+ if (unlikely(p == NULL))
+ return htonl(NFS4ERR_RESOURCE);
+ *p++ = htonl(op);
+ *p = res;
+ return 0;
+}
+
+static unsigned encode_getattr_res(struct svc_rqst *rqstp, struct xdr_stream *xdr, const struct cb_getattrres *res)
+{
+ uint32_t *savep;
+ unsigned status = res->status;
+
+ if (unlikely(status != 0))
+ goto out;
+ status = encode_attr_bitmap(xdr, res->bitmap, &savep);
+ if (unlikely(status != 0))
+ goto out;
+ status = encode_attr_change(xdr, res->bitmap, res->change_attr);
+ if (unlikely(status != 0))
+ goto out;
+ status = encode_attr_size(xdr, res->bitmap, res->size);
+ if (unlikely(status != 0))
+ goto out;
+ status = encode_attr_ctime(xdr, res->bitmap, &res->ctime);
+ if (unlikely(status != 0))
+ goto out;
+ status = encode_attr_mtime(xdr, res->bitmap, &res->mtime);
+ *savep = htonl((unsigned int)((char *)xdr->p - (char *)(savep+1)));
+out:
+ dprintk("%s: exit with status = %d\n", __FUNCTION__, status);
+ return status;
+}
+
+static unsigned process_op(struct svc_rqst *rqstp,
+ struct xdr_stream *xdr_in, void *argp,
+ struct xdr_stream *xdr_out, void *resp)
+{
+ struct callback_op *op;
+ unsigned int op_nr;
+ unsigned int status = 0;
+ long maxlen;
+ unsigned res;
+
+ dprintk("%s: start\n", __FUNCTION__);
+ status = decode_op_hdr(xdr_in, &op_nr);
+ if (unlikely(status != 0)) {
+ op_nr = OP_CB_ILLEGAL;
+ op = &callback_ops[0];
+ } else if (unlikely(op_nr != OP_CB_GETATTR && op_nr != OP_CB_RECALL)) {
+ op_nr = OP_CB_ILLEGAL;
+ op = &callback_ops[0];
+ status = htonl(NFS4ERR_OP_ILLEGAL);
+ } else
+ op = &callback_ops[op_nr];
+
+ maxlen = xdr_out->end - xdr_out->p;
+ if (maxlen > 0 && maxlen < PAGE_SIZE) {
+ if (likely(status == 0 && op->decode_args != NULL))
+ status = op->decode_args(rqstp, xdr_in, argp);
+ if (likely(status == 0 && op->process_op != NULL))
+ status = op->process_op(argp, resp);
+ } else
+ status = htonl(NFS4ERR_RESOURCE);
+
+ res = encode_op_hdr(xdr_out, op_nr, status);
+ if (status == 0)
+ status = res;
+ if (op->encode_res != NULL && status == 0)
+ status = op->encode_res(rqstp, xdr_out, resp);
+ dprintk("%s: done, status = %d\n", __FUNCTION__, status);
+ return status;
+}
+
+/*
+ * Decode, process and encode a COMPOUND
+ */
+static int nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *resp)
+{
+ struct cb_compound_hdr_arg hdr_arg;
+ struct cb_compound_hdr_res hdr_res;
+ struct xdr_stream xdr_in, xdr_out;
+ uint32_t *p;
+ unsigned int status;
+ unsigned int nops = 1;
+
+ dprintk("%s: start\n", __FUNCTION__);
+
+ xdr_init_decode(&xdr_in, &rqstp->rq_arg, rqstp->rq_arg.head[0].iov_base);
+
+ p = (uint32_t*)((char *)rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len);
+ rqstp->rq_res.head[0].iov_len = PAGE_SIZE;
+ xdr_init_encode(&xdr_out, &rqstp->rq_res, p);
+
+ decode_compound_hdr_arg(&xdr_in, &hdr_arg);
+ hdr_res.taglen = hdr_arg.taglen;
+ hdr_res.tag = hdr_arg.tag;
+ encode_compound_hdr_res(&xdr_out, &hdr_res);
+
+ for (;;) {
+ status = process_op(rqstp, &xdr_in, argp, &xdr_out, resp);
+ if (status != 0)
+ break;
+ if (nops == hdr_arg.nops)
+ break;
+ nops++;
+ }
+ *hdr_res.status = status;
+ *hdr_res.nops = htonl(nops);
+ dprintk("%s: done, status = %u\n", __FUNCTION__, status);
+ return rpc_success;
+}
+
+/*
+ * Define NFS4 callback COMPOUND ops.
+ */
+static struct callback_op callback_ops[] = {
+ [0] = {
+ .res_maxsize = CB_OP_HDR_RES_MAXSZ,
+ },
+ [OP_CB_GETATTR] = {
+ .process_op = (callback_process_op_t)nfs4_callback_getattr,
+ .decode_args = (callback_decode_arg_t)decode_getattr_args,
+ .encode_res = (callback_encode_res_t)encode_getattr_res,
+ .res_maxsize = CB_OP_GETATTR_RES_MAXSZ,
+ },
+ [OP_CB_RECALL] = {
+ .process_op = (callback_process_op_t)nfs4_callback_recall,
+ .decode_args = (callback_decode_arg_t)decode_recall_args,
+ .res_maxsize = CB_OP_RECALL_RES_MAXSZ,
+ }
+};
+
+/*
+ * Define NFS4 callback procedures
+ */
+static struct svc_procedure nfs4_callback_procedures1[] = {
+ [CB_NULL] = {
+ .pc_func = nfs4_callback_null,
+ .pc_decode = (kxdrproc_t)nfs4_decode_void,
+ .pc_encode = (kxdrproc_t)nfs4_encode_void,
+ .pc_xdrressize = 1,
+ },
+ [CB_COMPOUND] = {
+ .pc_func = nfs4_callback_compound,
+ .pc_encode = (kxdrproc_t)nfs4_encode_void,
+ .pc_argsize = 256,
+ .pc_ressize = 256,
+ .pc_xdrressize = NFS4_CALLBACK_BUFSIZE,
+ }
+};
+
+struct svc_version nfs4_callback_version1 = {
+ .vs_vers = 1,
+ .vs_nproc = ARRAY_SIZE(nfs4_callback_procedures1),
+ .vs_proc = nfs4_callback_procedures1,
+ .vs_xdrsize = NFS4_CALLBACK_XDRSIZE,
+ .vs_dispatch = NULL,
+};
+