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ceph: support versioned reply
In versioned reply, inodestat, dirstat and lease are encoded with version, compat_version and struct_len. Based on a patch from Jos Collin <jcollin@redhat.com>. Link: http://tracker.ceph.com/issues/26936 Signed-off-by: "Yan, Zheng" <zyan@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Yan, Zheng
Ilya Dryomov
parent
75c9627efb
commit
b37fe1f923
@ -65,6 +65,29 @@ static const struct ceph_connection_operations mds_con_ops;
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* mds reply parsing
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*/
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static int parse_reply_info_quota(void **p, void *end,
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struct ceph_mds_reply_info_in *info)
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{
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u8 struct_v, struct_compat;
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u32 struct_len;
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ceph_decode_8_safe(p, end, struct_v, bad);
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ceph_decode_8_safe(p, end, struct_compat, bad);
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/* struct_v is expected to be >= 1. we only
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* understand encoding with struct_compat == 1. */
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if (!struct_v || struct_compat != 1)
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goto bad;
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ceph_decode_32_safe(p, end, struct_len, bad);
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ceph_decode_need(p, end, struct_len, bad);
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end = *p + struct_len;
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ceph_decode_64_safe(p, end, info->max_bytes, bad);
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ceph_decode_64_safe(p, end, info->max_files, bad);
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*p = end;
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return 0;
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bad:
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return -EIO;
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}
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/*
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* parse individual inode info
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*/
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@ -72,8 +95,24 @@ static int parse_reply_info_in(void **p, void *end,
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struct ceph_mds_reply_info_in *info,
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u64 features)
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{
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int err = -EIO;
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int err = 0;
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u8 struct_v = 0;
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if (features == (u64)-1) {
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u32 struct_len;
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u8 struct_compat;
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ceph_decode_8_safe(p, end, struct_v, bad);
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ceph_decode_8_safe(p, end, struct_compat, bad);
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/* struct_v is expected to be >= 1. we only understand
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* encoding with struct_compat == 1. */
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if (!struct_v || struct_compat != 1)
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goto bad;
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ceph_decode_32_safe(p, end, struct_len, bad);
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ceph_decode_need(p, end, struct_len, bad);
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end = *p + struct_len;
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}
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ceph_decode_need(p, end, sizeof(struct ceph_mds_reply_inode), bad);
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info->in = *p;
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*p += sizeof(struct ceph_mds_reply_inode) +
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sizeof(*info->in->fragtree.splits) *
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@ -91,51 +130,129 @@ static int parse_reply_info_in(void **p, void *end,
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info->xattr_data = *p;
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*p += info->xattr_len;
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if (features & CEPH_FEATURE_MDS_INLINE_DATA) {
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if (features == (u64)-1) {
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/* inline data */
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ceph_decode_64_safe(p, end, info->inline_version, bad);
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ceph_decode_32_safe(p, end, info->inline_len, bad);
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ceph_decode_need(p, end, info->inline_len, bad);
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info->inline_data = *p;
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*p += info->inline_len;
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} else
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info->inline_version = CEPH_INLINE_NONE;
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if (features & CEPH_FEATURE_MDS_QUOTA) {
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u8 struct_v, struct_compat;
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u32 struct_len;
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/*
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* both struct_v and struct_compat are expected to be >= 1
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*/
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ceph_decode_8_safe(p, end, struct_v, bad);
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ceph_decode_8_safe(p, end, struct_compat, bad);
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if (!struct_v || !struct_compat)
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goto bad;
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ceph_decode_32_safe(p, end, struct_len, bad);
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ceph_decode_need(p, end, struct_len, bad);
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ceph_decode_64_safe(p, end, info->max_bytes, bad);
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ceph_decode_64_safe(p, end, info->max_files, bad);
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} else {
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info->max_bytes = 0;
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info->max_files = 0;
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}
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info->pool_ns_len = 0;
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info->pool_ns_data = NULL;
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if (features & CEPH_FEATURE_FS_FILE_LAYOUT_V2) {
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/* quota */
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err = parse_reply_info_quota(p, end, info);
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if (err < 0)
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goto out_bad;
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/* pool namespace */
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ceph_decode_32_safe(p, end, info->pool_ns_len, bad);
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if (info->pool_ns_len > 0) {
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ceph_decode_need(p, end, info->pool_ns_len, bad);
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info->pool_ns_data = *p;
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*p += info->pool_ns_len;
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}
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}
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/* btime, change_attr */
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{
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struct ceph_timespec btime;
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u64 change_attr;
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ceph_decode_need(p, end, sizeof(btime), bad);
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ceph_decode_copy(p, &btime, sizeof(btime));
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ceph_decode_64_safe(p, end, change_attr, bad);
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}
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*p = end;
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} else {
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if (features & CEPH_FEATURE_MDS_INLINE_DATA) {
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ceph_decode_64_safe(p, end, info->inline_version, bad);
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ceph_decode_32_safe(p, end, info->inline_len, bad);
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ceph_decode_need(p, end, info->inline_len, bad);
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info->inline_data = *p;
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*p += info->inline_len;
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} else
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info->inline_version = CEPH_INLINE_NONE;
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if (features & CEPH_FEATURE_MDS_QUOTA) {
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err = parse_reply_info_quota(p, end, info);
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if (err < 0)
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goto out_bad;
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} else {
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info->max_bytes = 0;
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info->max_files = 0;
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}
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info->pool_ns_len = 0;
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info->pool_ns_data = NULL;
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if (features & CEPH_FEATURE_FS_FILE_LAYOUT_V2) {
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ceph_decode_32_safe(p, end, info->pool_ns_len, bad);
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if (info->pool_ns_len > 0) {
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ceph_decode_need(p, end, info->pool_ns_len, bad);
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info->pool_ns_data = *p;
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*p += info->pool_ns_len;
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}
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}
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}
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return 0;
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bad:
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err = -EIO;
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out_bad:
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return err;
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}
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static int parse_reply_info_dir(void **p, void *end,
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struct ceph_mds_reply_dirfrag **dirfrag,
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u64 features)
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{
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if (features == (u64)-1) {
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u8 struct_v, struct_compat;
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u32 struct_len;
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ceph_decode_8_safe(p, end, struct_v, bad);
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ceph_decode_8_safe(p, end, struct_compat, bad);
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/* struct_v is expected to be >= 1. we only understand
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* encoding whose struct_compat == 1. */
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if (!struct_v || struct_compat != 1)
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goto bad;
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ceph_decode_32_safe(p, end, struct_len, bad);
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ceph_decode_need(p, end, struct_len, bad);
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end = *p + struct_len;
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}
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ceph_decode_need(p, end, sizeof(**dirfrag), bad);
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*dirfrag = *p;
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*p += sizeof(**dirfrag) + sizeof(u32) * le32_to_cpu((*dirfrag)->ndist);
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if (unlikely(*p > end))
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goto bad;
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if (features == (u64)-1)
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*p = end;
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return 0;
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bad:
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return -EIO;
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}
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static int parse_reply_info_lease(void **p, void *end,
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struct ceph_mds_reply_lease **lease,
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u64 features)
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{
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if (features == (u64)-1) {
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u8 struct_v, struct_compat;
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u32 struct_len;
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ceph_decode_8_safe(p, end, struct_v, bad);
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ceph_decode_8_safe(p, end, struct_compat, bad);
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/* struct_v is expected to be >= 1. we only understand
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* encoding whose struct_compat == 1. */
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if (!struct_v || struct_compat != 1)
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goto bad;
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ceph_decode_32_safe(p, end, struct_len, bad);
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ceph_decode_need(p, end, struct_len, bad);
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end = *p + struct_len;
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}
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ceph_decode_need(p, end, sizeof(**lease), bad);
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*lease = *p;
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*p += sizeof(**lease);
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if (features == (u64)-1)
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*p = end;
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return 0;
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bad:
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return -EIO;
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}
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/*
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* parse a normal reply, which may contain a (dir+)dentry and/or a
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* target inode.
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@ -151,20 +268,18 @@ static int parse_reply_info_trace(void **p, void *end,
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if (err < 0)
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goto out_bad;
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if (unlikely(*p + sizeof(*info->dirfrag) > end))
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goto bad;
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info->dirfrag = *p;
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*p += sizeof(*info->dirfrag) +
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sizeof(u32)*le32_to_cpu(info->dirfrag->ndist);
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if (unlikely(*p > end))
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goto bad;
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err = parse_reply_info_dir(p, end, &info->dirfrag, features);
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if (err < 0)
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goto out_bad;
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ceph_decode_32_safe(p, end, info->dname_len, bad);
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ceph_decode_need(p, end, info->dname_len, bad);
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info->dname = *p;
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*p += info->dname_len;
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info->dlease = *p;
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*p += sizeof(*info->dlease);
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err = parse_reply_info_lease(p, end, &info->dlease, features);
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if (err < 0)
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goto out_bad;
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}
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if (info->head->is_target) {
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@ -187,20 +302,16 @@ out_bad:
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/*
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* parse readdir results
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*/
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static int parse_reply_info_dir(void **p, void *end,
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static int parse_reply_info_readdir(void **p, void *end,
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struct ceph_mds_reply_info_parsed *info,
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u64 features)
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{
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u32 num, i = 0;
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int err;
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info->dir_dir = *p;
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if (*p + sizeof(*info->dir_dir) > end)
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goto bad;
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*p += sizeof(*info->dir_dir) +
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sizeof(u32)*le32_to_cpu(info->dir_dir->ndist);
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if (*p > end)
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goto bad;
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err = parse_reply_info_dir(p, end, &info->dir_dir, features);
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if (err < 0)
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goto out_bad;
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ceph_decode_need(p, end, sizeof(num) + 2, bad);
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num = ceph_decode_32(p);
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@ -226,15 +337,16 @@ static int parse_reply_info_dir(void **p, void *end,
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while (num) {
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struct ceph_mds_reply_dir_entry *rde = info->dir_entries + i;
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/* dentry */
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ceph_decode_need(p, end, sizeof(u32)*2, bad);
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rde->name_len = ceph_decode_32(p);
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ceph_decode_32_safe(p, end, rde->name_len, bad);
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ceph_decode_need(p, end, rde->name_len, bad);
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rde->name = *p;
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*p += rde->name_len;
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dout("parsed dir dname '%.*s'\n", rde->name_len, rde->name);
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rde->lease = *p;
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*p += sizeof(struct ceph_mds_reply_lease);
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/* dentry lease */
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err = parse_reply_info_lease(p, end, &rde->lease, features);
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if (err)
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goto out_bad;
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/* inode */
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err = parse_reply_info_in(p, end, &rde->inode, features);
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if (err < 0)
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@ -285,7 +397,8 @@ static int parse_reply_info_create(void **p, void *end,
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struct ceph_mds_reply_info_parsed *info,
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u64 features)
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{
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if (features & CEPH_FEATURE_REPLY_CREATE_INODE) {
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if (features == (u64)-1 ||
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(features & CEPH_FEATURE_REPLY_CREATE_INODE)) {
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if (*p == end) {
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info->has_create_ino = false;
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} else {
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@ -314,7 +427,7 @@ static int parse_reply_info_extra(void **p, void *end,
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if (op == CEPH_MDS_OP_GETFILELOCK)
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return parse_reply_info_filelock(p, end, info, features);
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else if (op == CEPH_MDS_OP_READDIR || op == CEPH_MDS_OP_LSSNAP)
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return parse_reply_info_dir(p, end, info, features);
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return parse_reply_info_readdir(p, end, info, features);
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else if (op == CEPH_MDS_OP_CREATE)
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return parse_reply_info_create(p, end, info, features);
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else
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@ -2657,7 +2770,10 @@ static void handle_reply(struct ceph_mds_session *session, struct ceph_msg *msg)
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dout("handle_reply tid %lld result %d\n", tid, result);
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rinfo = &req->r_reply_info;
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err = parse_reply_info(msg, rinfo, session->s_con.peer_features);
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if (test_bit(CEPHFS_FEATURE_REPLY_ENCODING, &session->s_features))
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err = parse_reply_info(msg, rinfo, (u64)-1);
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else
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err = parse_reply_info(msg, rinfo, session->s_con.peer_features);
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mutex_unlock(&mdsc->mutex);
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mutex_lock(&session->s_mutex);
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@ -26,6 +26,7 @@
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#define CEPHFS_FEATURES_CLIENT_SUPPORTED { \
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0, 1, 2, 3, 4, 5, 6, 7, \
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CEPHFS_FEATURE_MIMIC, \
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CEPHFS_FEATURE_REPLY_ENCODING, \
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CEPHFS_FEATURE_LAZY_CAP_WANTED, \
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CEPHFS_FEATURE_MULTI_RECONNECT, \
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}
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