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path: root/fs/nfs/nfs4xdr.c
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Diffstat (limited to 'fs/nfs/nfs4xdr.c')
-rw-r--r--fs/nfs/nfs4xdr.c340
1 files changed, 197 insertions, 143 deletions
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 08ef91291132..bd2101d918c8 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -816,7 +816,7 @@ static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const
if (iap->ia_valid & ATTR_MODE)
len += 4;
if (iap->ia_valid & ATTR_UID) {
- owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
+ owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name, IDMAP_NAMESZ);
if (owner_namelen < 0) {
dprintk("nfs: couldn't resolve uid %d to string\n",
iap->ia_uid);
@@ -828,7 +828,7 @@ static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const
len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
}
if (iap->ia_valid & ATTR_GID) {
- owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
+ owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group, IDMAP_NAMESZ);
if (owner_grouplen < 0) {
dprintk("nfs: couldn't resolve gid %d to string\n",
iap->ia_gid);
@@ -1385,24 +1385,35 @@ static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args,
static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
{
- uint32_t attrs[2] = {
- FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
- FATTR4_WORD1_MOUNTED_ON_FILEID,
- };
+ uint32_t attrs[2] = {0, 0};
+ uint32_t dircount = readdir->count >> 1;
__be32 *p;
+ if (readdir->plus) {
+ attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
+ FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE;
+ attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
+ FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
+ FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
+ FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
+ dircount >>= 1;
+ }
+ attrs[0] |= FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID;
+ attrs[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
+ /* Switch to mounted_on_fileid if the server supports it */
+ if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
+ attrs[0] &= ~FATTR4_WORD0_FILEID;
+ else
+ attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
+
p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
*p++ = cpu_to_be32(OP_READDIR);
p = xdr_encode_hyper(p, readdir->cookie);
p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
- *p++ = cpu_to_be32(readdir->count >> 1); /* We're not doing readdirplus */
+ *p++ = cpu_to_be32(dircount);
*p++ = cpu_to_be32(readdir->count);
*p++ = cpu_to_be32(2);
- /* Switch to mounted_on_fileid if the server supports it */
- if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
- attrs[0] &= ~FATTR4_WORD0_FILEID;
- else
- attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
+
*p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
*p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
hdr->nops++;
@@ -1823,7 +1834,7 @@ static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs
/*
* Encode RENAME request
*/
-static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
+static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs_renameargs *args)
{
struct xdr_stream xdr;
struct compound_hdr hdr = {
@@ -2676,7 +2687,10 @@ out_overflow:
static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
{
if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
- decode_attr_bitmap(xdr, bitmask);
+ int ret;
+ ret = decode_attr_bitmap(xdr, bitmask);
+ if (unlikely(ret < 0))
+ return ret;
bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
} else
bitmask[0] = bitmask[1] = 0;
@@ -2848,6 +2862,56 @@ out_overflow:
return -EIO;
}
+static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap)
+{
+ __be32 *p;
+
+ if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
+ return -EIO;
+ if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
+ }
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
+{
+ __be32 *p;
+ int len;
+
+ if (fh != NULL)
+ memset(fh, 0, sizeof(*fh));
+
+ if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
+ return -EIO;
+ if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ len = be32_to_cpup(p);
+ if (len > NFS4_FHSIZE)
+ return -EIO;
+ p = xdr_inline_decode(xdr, len);
+ if (unlikely(!p))
+ goto out_overflow;
+ if (fh != NULL) {
+ memcpy(fh->data, p, len);
+ fh->size = len;
+ }
+ bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
+ }
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
__be32 *p;
@@ -3521,6 +3585,24 @@ static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, s
return status;
}
+static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
+ struct timespec *time)
+{
+ int status = 0;
+
+ time->tv_sec = 0;
+ time->tv_nsec = 0;
+ if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
+ return -EIO;
+ if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
+ status = decode_attr_time(xdr, time);
+ bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
+ }
+ dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
+ (long)time->tv_nsec);
+ return status;
+}
+
static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
{
int status = 0;
@@ -3744,29 +3826,14 @@ xdr_error:
return status;
}
-static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
+static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
+ struct nfs_fattr *fattr, struct nfs_fh *fh,
const struct nfs_server *server, int may_sleep)
{
- __be32 *savep;
- uint32_t attrlen,
- bitmap[2] = {0},
- type;
int status;
umode_t fmode = 0;
uint64_t fileid;
-
- status = decode_op_hdr(xdr, OP_GETATTR);
- if (status < 0)
- goto xdr_error;
-
- status = decode_attr_bitmap(xdr, bitmap);
- if (status < 0)
- goto xdr_error;
-
- status = decode_attr_length(xdr, &attrlen, &savep);
- if (status < 0)
- goto xdr_error;
-
+ uint32_t type;
status = decode_attr_type(xdr, bitmap, &type);
if (status < 0)
@@ -3792,6 +3859,14 @@ static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
goto xdr_error;
fattr->valid |= status;
+ status = decode_attr_error(xdr, bitmap);
+ if (status < 0)
+ goto xdr_error;
+
+ status = decode_attr_filehandle(xdr, bitmap, fh);
+ if (status < 0)
+ goto xdr_error;
+
status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
if (status < 0)
goto xdr_error;
@@ -3862,12 +3937,46 @@ static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
fattr->valid |= status;
}
+xdr_error:
+ dprintk("%s: xdr returned %d\n", __func__, -status);
+ return status;
+}
+
+static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
+ struct nfs_fh *fh, const struct nfs_server *server, int may_sleep)
+{
+ __be32 *savep;
+ uint32_t attrlen,
+ bitmap[2] = {0};
+ int status;
+
+ status = decode_op_hdr(xdr, OP_GETATTR);
+ if (status < 0)
+ goto xdr_error;
+
+ status = decode_attr_bitmap(xdr, bitmap);
+ if (status < 0)
+ goto xdr_error;
+
+ status = decode_attr_length(xdr, &attrlen, &savep);
+ if (status < 0)
+ goto xdr_error;
+
+ status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, server, may_sleep);
+ if (status < 0)
+ goto xdr_error;
+
status = verify_attr_len(xdr, savep, attrlen);
xdr_error:
dprintk("%s: xdr returned %d\n", __func__, -status);
return status;
}
+static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
+ const struct nfs_server *server, int may_sleep)
+{
+ return decode_getfattr_generic(xdr, fattr, NULL, server, may_sleep);
+}
static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
{
@@ -3894,6 +4003,9 @@ static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
goto xdr_error;
fsinfo->wtpref = fsinfo->wtmax;
+ status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
+ if (status != 0)
+ goto xdr_error;
status = verify_attr_len(xdr, savep, attrlen);
xdr_error:
@@ -3950,13 +4062,13 @@ static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
__be32 *p;
uint32_t namelen, type;
- p = xdr_inline_decode(xdr, 32);
+ p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
if (unlikely(!p))
goto out_overflow;
- p = xdr_decode_hyper(p, &offset);
+ p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
p = xdr_decode_hyper(p, &length);
- type = be32_to_cpup(p++);
- if (fl != NULL) {
+ type = be32_to_cpup(p++); /* 4 byte read */
+ if (fl != NULL) { /* manipulate file lock */
fl->fl_start = (loff_t)offset;
fl->fl_end = fl->fl_start + (loff_t)length - 1;
if (length == ~(uint64_t)0)
@@ -3966,9 +4078,9 @@ static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
fl->fl_type = F_RDLCK;
fl->fl_pid = 0;
}
- p = xdr_decode_hyper(p, &clientid);
- namelen = be32_to_cpup(p);
- p = xdr_inline_decode(xdr, namelen);
+ p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
+ namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
+ p = xdr_inline_decode(xdr, namelen); /* variable size field */
if (likely(p))
return -NFS4ERR_DENIED;
out_overflow:
@@ -4200,12 +4312,9 @@ out_overflow:
static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
{
struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
- struct page *page = *rcvbuf->pages;
struct kvec *iov = rcvbuf->head;
size_t hdrlen;
u32 recvd, pglen = rcvbuf->page_len;
- __be32 *end, *entry, *p, *kaddr;
- unsigned int nr = 0;
int status;
status = decode_op_hdr(xdr, OP_READDIR);
@@ -4225,71 +4334,8 @@ static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct n
pglen = recvd;
xdr_read_pages(xdr, pglen);
- BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
- kaddr = p = kmap_atomic(page, KM_USER0);
- end = p + ((pglen + readdir->pgbase) >> 2);
- entry = p;
-
- /* Make sure the packet actually has a value_follows and EOF entry */
- if ((entry + 1) > end)
- goto short_pkt;
-
- for (; *p++; nr++) {
- u32 len, attrlen, xlen;
- if (end - p < 3)
- goto short_pkt;
- dprintk("cookie = %Lu, ", *((unsigned long long *)p));
- p += 2; /* cookie */
- len = ntohl(*p++); /* filename length */
- if (len > NFS4_MAXNAMLEN) {
- dprintk("NFS: giant filename in readdir (len 0x%x)\n",
- len);
- goto err_unmap;
- }
- xlen = XDR_QUADLEN(len);
- if (end - p < xlen + 1)
- goto short_pkt;
- dprintk("filename = %*s\n", len, (char *)p);
- p += xlen;
- len = ntohl(*p++); /* bitmap length */
- if (end - p < len + 1)
- goto short_pkt;
- p += len;
- attrlen = XDR_QUADLEN(ntohl(*p++));
- if (end - p < attrlen + 2)
- goto short_pkt;
- p += attrlen; /* attributes */
- entry = p;
- }
- /*
- * Apparently some server sends responses that are a valid size, but
- * contain no entries, and have value_follows==0 and EOF==0. For
- * those, just set the EOF marker.
- */
- if (!nr && entry[1] == 0) {
- dprintk("NFS: readdir reply truncated!\n");
- entry[1] = 1;
- }
-out:
- kunmap_atomic(kaddr, KM_USER0);
+
return 0;
-short_pkt:
- /*
- * When we get a short packet there are 2 possibilities. We can
- * return an error, or fix up the response to look like a valid
- * response and return what we have so far. If there are no
- * entries and the packet was short, then return -EIO. If there
- * are valid entries in the response, return them and pretend that
- * the call was successful, but incomplete. The caller can retry the
- * readdir starting at the last cookie.
- */
- dprintk("%s: short packet at entry %d\n", __func__, nr);
- entry[0] = entry[1] = 0;
- if (nr)
- goto out;
-err_unmap:
- kunmap_atomic(kaddr, KM_USER0);
- return -errno_NFSERR_IO;
}
static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
@@ -4299,7 +4345,6 @@ static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
size_t hdrlen;
u32 len, recvd;
__be32 *p;
- char *kaddr;
int status;
status = decode_op_hdr(xdr, OP_READLINK);
@@ -4330,9 +4375,7 @@ static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
* and and null-terminate the text (the VFS expects
* null-termination).
*/
- kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
- kaddr[len+rcvbuf->page_base] = '\0';
- kunmap_atomic(kaddr, KM_USER0);
+ xdr_terminate_string(rcvbuf, len);
return 0;
out_overflow:
print_overflow_msg(__func__, xdr);
@@ -4668,7 +4711,6 @@ static int decode_sequence(struct xdr_stream *xdr,
struct rpc_rqst *rqstp)
{
#if defined(CONFIG_NFS_V4_1)
- struct nfs4_slot *slot;
struct nfs4_sessionid id;
u32 dummy;
int status;
@@ -4700,15 +4742,14 @@ static int decode_sequence(struct xdr_stream *xdr,
goto out_overflow;
/* seqid */
- slot = &res->sr_session->fc_slot_table.slots[res->sr_slotid];
dummy = be32_to_cpup(p++);
- if (dummy != slot->seq_nr) {
+ if (dummy != res->sr_slot->seq_nr) {
dprintk("%s Invalid sequence number\n", __func__);
goto out_err;
}
/* slot id */
dummy = be32_to_cpup(p++);
- if (dummy != res->sr_slotid) {
+ if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
dprintk("%s Invalid slot id\n", __func__);
goto out_err;
}
@@ -4873,7 +4914,7 @@ out:
/*
* Decode RENAME response
*/
-static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
+static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs_renameres *res)
{
struct xdr_stream xdr;
struct compound_hdr hdr;
@@ -5760,23 +5801,35 @@ static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp, uint32_t *p,
}
#endif /* CONFIG_NFS_V4_1 */
-__be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
+__be32 *nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
+ struct nfs_server *server, int plus)
{
uint32_t bitmap[2] = {0};
uint32_t len;
-
- if (!*p++) {
- if (!*p)
+ __be32 *p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ if (!ntohl(*p++)) {
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ if (!ntohl(*p++))
return ERR_PTR(-EAGAIN);
entry->eof = 1;
return ERR_PTR(-EBADCOOKIE);
}
+ p = xdr_inline_decode(xdr, 12);
+ if (unlikely(!p))
+ goto out_overflow;
entry->prev_cookie = entry->cookie;
p = xdr_decode_hyper(p, &entry->cookie);
entry->len = ntohl(*p++);
+
+ p = xdr_inline_decode(xdr, entry->len);
+ if (unlikely(!p))
+ goto out_overflow;
entry->name = (const char *) p;
- p += XDR_QUADLEN(entry->len);
/*
* In case the server doesn't return an inode number,
@@ -5784,32 +5837,33 @@ __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
* since glibc seems to choke on it...)
*/
entry->ino = 1;
+ entry->fattr->valid = 0;
- len = ntohl(*p++); /* bitmap length */
- if (len-- > 0) {
- bitmap[0] = ntohl(*p++);
- if (len-- > 0) {
- bitmap[1] = ntohl(*p++);
- p += len;
- }
- }
- len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
- if (len > 0) {
- if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
- bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
- /* Ignore the return value of rdattr_error for now */
- p++;
- len--;
- }
- if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
- xdr_decode_hyper(p, &entry->ino);
- else if (bitmap[0] == FATTR4_WORD0_FILEID)
- xdr_decode_hyper(p, &entry->ino);
- p += len;
- }
+ if (decode_attr_bitmap(xdr, bitmap) < 0)
+ goto out_overflow;
+
+ if (decode_attr_length(xdr, &len, &p) < 0)
+ goto out_overflow;
+
+ if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh, server, 1) < 0)
+ goto out_overflow;
+ if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
+ entry->ino = entry->fattr->fileid;
+
+ if (verify_attr_len(xdr, p, len) < 0)
+ goto out_overflow;
+
+ p = xdr_inline_peek(xdr, 8);
+ if (p != NULL)
+ entry->eof = !p[0] && p[1];
+ else
+ entry->eof = 0;
- entry->eof = !p[0] && p[1];
return p;
+
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return ERR_PTR(-EIO);
}
/*
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-16 10:00:34 +0000