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path: root/fs/nfsd/nfs4xdr.c
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Diffstat (limited to 'fs/nfsd/nfs4xdr.c')
-rw-r--r--fs/nfsd/nfs4xdr.c105
1 files changed, 53 insertions, 52 deletions
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index c719c475a068..1955481832e0 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -3490,11 +3490,13 @@ nfsd4_encode_fattr4(struct svc_rqst *rqstp, struct xdr_stream *xdr,
struct dentry *dentry, const u32 *bmval,
int ignore_crossmnt)
{
+ DECLARE_BITMAP(attr_bitmap, ARRAY_SIZE(nfsd4_enc_fattr4_encode_ops));
struct nfsd4_fattr_args args;
struct svc_fh *tempfh = NULL;
int starting_len = xdr->buf->len;
__be32 *attrlen_p, status;
int attrlen_offset;
+ u32 attrmask[3];
int err;
struct nfsd4_compoundres *resp = rqstp->rq_resp;
u32 minorversion = resp->cstate.minorversion;
@@ -3502,11 +3504,9 @@ nfsd4_encode_fattr4(struct svc_rqst *rqstp, struct xdr_stream *xdr,
.mnt = exp->ex_path.mnt,
.dentry = dentry,
};
- union {
- u32 attrmask[3];
- unsigned long mask[2];
- } u;
unsigned long bit;
+ bool file_modified = false;
+ u64 size = 0;
WARN_ON_ONCE(bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1);
WARN_ON_ONCE(!nfsd_attrs_supported(minorversion, bmval));
@@ -3519,21 +3519,21 @@ nfsd4_encode_fattr4(struct svc_rqst *rqstp, struct xdr_stream *xdr,
/*
* Make a local copy of the attribute bitmap that can be modified.
*/
- memset(&u, 0, sizeof(u));
- u.attrmask[0] = bmval[0];
- u.attrmask[1] = bmval[1];
- u.attrmask[2] = bmval[2];
+ attrmask[0] = bmval[0];
+ attrmask[1] = bmval[1];
+ attrmask[2] = bmval[2];
args.rdattr_err = 0;
if (exp->ex_fslocs.migrated) {
- status = fattr_handle_absent_fs(&u.attrmask[0], &u.attrmask[1],
- &u.attrmask[2], &args.rdattr_err);
+ status = fattr_handle_absent_fs(&attrmask[0], &attrmask[1],
+ &attrmask[2], &args.rdattr_err);
if (status)
goto out;
}
args.size = 0;
- if (u.attrmask[0] & (FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE)) {
- status = nfsd4_deleg_getattr_conflict(rqstp, d_inode(dentry));
+ if (attrmask[0] & (FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE)) {
+ status = nfsd4_deleg_getattr_conflict(rqstp, d_inode(dentry),
+ &file_modified, &size);
if (status)
goto out;
}
@@ -3543,20 +3543,23 @@ nfsd4_encode_fattr4(struct svc_rqst *rqstp, struct xdr_stream *xdr,
AT_STATX_SYNC_AS_STAT);
if (err)
goto out_nfserr;
- args.size = args.stat.size;
+ if (file_modified)
+ args.size = size;
+ else
+ args.size = args.stat.size;
if (!(args.stat.result_mask & STATX_BTIME))
/* underlying FS does not offer btime so we can't share it */
- u.attrmask[1] &= ~FATTR4_WORD1_TIME_CREATE;
- if ((u.attrmask[0] & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
+ attrmask[1] &= ~FATTR4_WORD1_TIME_CREATE;
+ if ((attrmask[0] & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
- (u.attrmask[1] & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
+ (attrmask[1] & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
FATTR4_WORD1_SPACE_TOTAL))) {
err = vfs_statfs(&path, &args.statfs);
if (err)
goto out_nfserr;
}
- if ((u.attrmask[0] & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) &&
+ if ((attrmask[0] & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) &&
!fhp) {
tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
status = nfserr_jukebox;
@@ -3571,10 +3574,10 @@ nfsd4_encode_fattr4(struct svc_rqst *rqstp, struct xdr_stream *xdr,
args.fhp = fhp;
args.acl = NULL;
- if (u.attrmask[0] & FATTR4_WORD0_ACL) {
+ if (attrmask[0] & FATTR4_WORD0_ACL) {
err = nfsd4_get_nfs4_acl(rqstp, dentry, &args.acl);
if (err == -EOPNOTSUPP)
- u.attrmask[0] &= ~FATTR4_WORD0_ACL;
+ attrmask[0] &= ~FATTR4_WORD0_ACL;
else if (err == -EINVAL) {
status = nfserr_attrnotsupp;
goto out;
@@ -3586,17 +3589,17 @@ nfsd4_encode_fattr4(struct svc_rqst *rqstp, struct xdr_stream *xdr,
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
args.context = NULL;
- if ((u.attrmask[2] & FATTR4_WORD2_SECURITY_LABEL) ||
- u.attrmask[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
+ if ((attrmask[2] & FATTR4_WORD2_SECURITY_LABEL) ||
+ attrmask[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
if (exp->ex_flags & NFSEXP_SECURITY_LABEL)
err = security_inode_getsecctx(d_inode(dentry),
&args.context, &args.contextlen);
else
err = -EOPNOTSUPP;
args.contextsupport = (err == 0);
- if (u.attrmask[2] & FATTR4_WORD2_SECURITY_LABEL) {
+ if (attrmask[2] & FATTR4_WORD2_SECURITY_LABEL) {
if (err == -EOPNOTSUPP)
- u.attrmask[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
+ attrmask[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
else if (err)
goto out_nfserr;
}
@@ -3604,8 +3607,8 @@ nfsd4_encode_fattr4(struct svc_rqst *rqstp, struct xdr_stream *xdr,
#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
/* attrmask */
- status = nfsd4_encode_bitmap4(xdr, u.attrmask[0],
- u.attrmask[1], u.attrmask[2]);
+ status = nfsd4_encode_bitmap4(xdr, attrmask[0], attrmask[1],
+ attrmask[2]);
if (status)
goto out;
@@ -3614,7 +3617,9 @@ nfsd4_encode_fattr4(struct svc_rqst *rqstp, struct xdr_stream *xdr,
attrlen_p = xdr_reserve_space(xdr, XDR_UNIT);
if (!attrlen_p)
goto out_resource;
- for_each_set_bit(bit, (const unsigned long *)&u.mask,
+ bitmap_from_arr32(attr_bitmap, attrmask,
+ ARRAY_SIZE(nfsd4_enc_fattr4_encode_ops));
+ for_each_set_bit(bit, attr_bitmap,
ARRAY_SIZE(nfsd4_enc_fattr4_encode_ops)) {
status = nfsd4_enc_fattr4_encode_ops[bit](xdr, &args);
if (status != nfs_ok)
@@ -5386,16 +5391,11 @@ nfsd4_listxattr_validate_cookie(struct nfsd4_listxattrs *listxattrs,
/*
* If the cookie is larger than the maximum number we can fit
- * in either the buffer we just got back from vfs_listxattr, or,
- * XDR-encoded, in the return buffer, it's invalid.
+ * in the buffer we just got back from vfs_listxattr, it's invalid.
*/
if (cookie > (listxattrs->lsxa_len) / (XATTR_USER_PREFIX_LEN + 2))
return nfserr_badcookie;
- if (cookie > (listxattrs->lsxa_maxcount /
- (XDR_QUADLEN(XATTR_USER_PREFIX_LEN + 2) + 4)))
- return nfserr_badcookie;
-
*offsetp = (u32)cookie;
return 0;
}
@@ -5412,6 +5412,7 @@ nfsd4_encode_listxattrs(struct nfsd4_compoundres *resp, __be32 nfserr,
u64 cookie;
char *sp;
__be32 status, tmp;
+ __be64 wire_cookie;
__be32 *p;
u32 nuser;
@@ -5427,7 +5428,7 @@ nfsd4_encode_listxattrs(struct nfsd4_compoundres *resp, __be32 nfserr,
*/
cookie_offset = xdr->buf->len;
count_offset = cookie_offset + 8;
- p = xdr_reserve_space(xdr, 12);
+ p = xdr_reserve_space(xdr, XDR_UNIT * 3);
if (!p) {
status = nfserr_resource;
goto out;
@@ -5438,7 +5439,8 @@ nfsd4_encode_listxattrs(struct nfsd4_compoundres *resp, __be32 nfserr,
sp = listxattrs->lsxa_buf;
nuser = 0;
- xdrleft = listxattrs->lsxa_maxcount;
+ /* Bytes left is maxcount - 8 (cookie) - 4 (array count) */
+ xdrleft = listxattrs->lsxa_maxcount - XDR_UNIT * 3;
while (left > 0 && xdrleft > 0) {
slen = strlen(sp);
@@ -5451,7 +5453,8 @@ nfsd4_encode_listxattrs(struct nfsd4_compoundres *resp, __be32 nfserr,
slen -= XATTR_USER_PREFIX_LEN;
xdrlen = 4 + ((slen + 3) & ~3);
- if (xdrlen > xdrleft) {
+ /* Check if both entry and eof can fit in the XDR buffer */
+ if (xdrlen + XDR_UNIT > xdrleft) {
if (count == 0) {
/*
* Can't even fit the first attribute name.
@@ -5503,7 +5506,8 @@ wreof:
cookie = offset + count;
- write_bytes_to_xdr_buf(xdr->buf, cookie_offset, &cookie, 8);
+ wire_cookie = cpu_to_be64(cookie);
+ write_bytes_to_xdr_buf(xdr->buf, cookie_offset, &wire_cookie, 8);
tmp = cpu_to_be32(count);
write_bytes_to_xdr_buf(xdr->buf, count_offset, &tmp, 4);
out:
@@ -5727,27 +5731,24 @@ release:
rqstp->rq_next_page = xdr->page_ptr + 1;
}
-/*
- * Encode the reply stored in the stateowner reply cache
- *
- * XDR note: do not encode rp->rp_buflen: the buffer contains the
- * previously sent already encoded operation.
+/**
+ * nfsd4_encode_replay - encode a result stored in the stateowner reply cache
+ * @xdr: send buffer's XDR stream
+ * @op: operation being replayed
+ *
+ * @op->replay->rp_buf contains the previously-sent already-encoded result.
*/
-void
-nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
+void nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
{
- __be32 *p;
struct nfs4_replay *rp = op->replay;
- p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
- if (!p) {
- WARN_ON_ONCE(1);
- return;
- }
- *p++ = cpu_to_be32(op->opnum);
- *p++ = rp->rp_status; /* already xdr'ed */
+ trace_nfsd_stateowner_replay(op->opnum, rp);
- p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
+ if (xdr_stream_encode_u32(xdr, op->opnum) != XDR_UNIT)
+ return;
+ if (xdr_stream_encode_be32(xdr, rp->rp_status) != XDR_UNIT)
+ return;
+ xdr_stream_encode_opaque_fixed(xdr, rp->rp_buf, rp->rp_buflen);
}
void nfsd4_release_compoundargs(struct svc_rqst *rqstp)
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-10 00:21:20 +0000