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-rw-r--r--fs/ceph/mds_client.c122
-rw-r--r--fs/ceph/mds_client.h9
2 files changed, 121 insertions, 10 deletions
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index 9ffb2ee623af..1e738d67586d 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -415,21 +415,121 @@ bad:
return -EIO;
}
+
+#if BITS_PER_LONG == 64
+
+#define DELEGATED_INO_AVAILABLE xa_mk_value(1)
+
+static int ceph_parse_deleg_inos(void **p, void *end,
+ struct ceph_mds_session *s)
+{
+ u32 sets;
+
+ ceph_decode_32_safe(p, end, sets, bad);
+ dout("got %u sets of delegated inodes\n", sets);
+ while (sets--) {
+ u64 start, len, ino;
+
+ ceph_decode_64_safe(p, end, start, bad);
+ ceph_decode_64_safe(p, end, len, bad);
+ while (len--) {
+ int err = xa_insert(&s->s_delegated_inos, ino = start++,
+ DELEGATED_INO_AVAILABLE,
+ GFP_KERNEL);
+ if (!err) {
+ dout("added delegated inode 0x%llx\n",
+ start - 1);
+ } else if (err == -EBUSY) {
+ pr_warn("ceph: MDS delegated inode 0x%llx more than once.\n",
+ start - 1);
+ } else {
+ return err;
+ }
+ }
+ }
+ return 0;
+bad:
+ return -EIO;
+}
+
+u64 ceph_get_deleg_ino(struct ceph_mds_session *s)
+{
+ unsigned long ino;
+ void *val;
+
+ xa_for_each(&s->s_delegated_inos, ino, val) {
+ val = xa_erase(&s->s_delegated_inos, ino);
+ if (val == DELEGATED_INO_AVAILABLE)
+ return ino;
+ }
+ return 0;
+}
+
+int ceph_restore_deleg_ino(struct ceph_mds_session *s, u64 ino)
+{
+ return xa_insert(&s->s_delegated_inos, ino, DELEGATED_INO_AVAILABLE,
+ GFP_KERNEL);
+}
+#else /* BITS_PER_LONG == 64 */
+/*
+ * FIXME: xarrays can't handle 64-bit indexes on a 32-bit arch. For now, just
+ * ignore delegated_inos on 32 bit arch. Maybe eventually add xarrays for top
+ * and bottom words?
+ */
+static int ceph_parse_deleg_inos(void **p, void *end,
+ struct ceph_mds_session *s)
+{
+ u32 sets;
+
+ ceph_decode_32_safe(p, end, sets, bad);
+ if (sets)
+ ceph_decode_skip_n(p, end, sets * 2 * sizeof(__le64), bad);
+ return 0;
+bad:
+ return -EIO;
+}
+
+u64 ceph_get_deleg_ino(struct ceph_mds_session *s)
+{
+ return 0;
+}
+
+int ceph_restore_deleg_ino(struct ceph_mds_session *s, u64 ino)
+{
+ return 0;
+}
+#endif /* BITS_PER_LONG == 64 */
+
/*
* parse create results
*/
static int parse_reply_info_create(void **p, void *end,
struct ceph_mds_reply_info_parsed *info,
- u64 features)
+ u64 features, struct ceph_mds_session *s)
{
+ int ret;
+
if (features == (u64)-1 ||
(features & CEPH_FEATURE_REPLY_CREATE_INODE)) {
- /* Malformed reply? */
if (*p == end) {
+ /* Malformed reply? */
info->has_create_ino = false;
- } else {
+ } else if (test_bit(CEPHFS_FEATURE_DELEG_INO, &s->s_features)) {
+ u8 struct_v, struct_compat;
+ u32 len;
+
info->has_create_ino = true;
+ ceph_decode_8_safe(p, end, struct_v, bad);
+ ceph_decode_8_safe(p, end, struct_compat, bad);
+ ceph_decode_32_safe(p, end, len, bad);
+ ceph_decode_64_safe(p, end, info->ino, bad);
+ ret = ceph_parse_deleg_inos(p, end, s);
+ if (ret)
+ return ret;
+ } else {
+ /* legacy */
ceph_decode_64_safe(p, end, info->ino, bad);
+ info->has_create_ino = true;
}
} else {
if (*p != end)
@@ -448,7 +548,7 @@ bad:
*/
static int parse_reply_info_extra(void **p, void *end,
struct ceph_mds_reply_info_parsed *info,
- u64 features)
+ u64 features, struct ceph_mds_session *s)
{
u32 op = le32_to_cpu(info->head->op);
@@ -457,7 +557,7 @@ static int parse_reply_info_extra(void **p, void *end,
else if (op == CEPH_MDS_OP_READDIR || op == CEPH_MDS_OP_LSSNAP)
return parse_reply_info_readdir(p, end, info, features);
else if (op == CEPH_MDS_OP_CREATE)
- return parse_reply_info_create(p, end, info, features);
+ return parse_reply_info_create(p, end, info, features, s);
else
return -EIO;
}
@@ -465,7 +565,7 @@ static int parse_reply_info_extra(void **p, void *end,
/*
* parse entire mds reply
*/
-static int parse_reply_info(struct ceph_msg *msg,
+static int parse_reply_info(struct ceph_mds_session *s, struct ceph_msg *msg,
struct ceph_mds_reply_info_parsed *info,
u64 features)
{
@@ -490,7 +590,7 @@ static int parse_reply_info(struct ceph_msg *msg,
ceph_decode_32_safe(&p, end, len, bad);
if (len > 0) {
ceph_decode_need(&p, end, len, bad);
- err = parse_reply_info_extra(&p, p+len, info, features);
+ err = parse_reply_info_extra(&p, p+len, info, features, s);
if (err < 0)
goto out_bad;
}
@@ -558,6 +658,7 @@ void ceph_put_mds_session(struct ceph_mds_session *s)
if (refcount_dec_and_test(&s->s_ref)) {
if (s->s_auth.authorizer)
ceph_auth_destroy_authorizer(s->s_auth.authorizer);
+ xa_destroy(&s->s_delegated_inos);
kfree(s);
}
}
@@ -645,6 +746,7 @@ static struct ceph_mds_session *register_session(struct ceph_mds_client *mdsc,
refcount_set(&s->s_ref, 1);
INIT_LIST_HEAD(&s->s_waiting);
INIT_LIST_HEAD(&s->s_unsafe);
+ xa_init(&s->s_delegated_inos);
s->s_num_cap_releases = 0;
s->s_cap_reconnect = 0;
s->s_cap_iterator = NULL;
@@ -2980,9 +3082,9 @@ static void handle_reply(struct ceph_mds_session *session, struct ceph_msg *msg)
dout("handle_reply tid %lld result %d\n", tid, result);
rinfo = &req->r_reply_info;
if (test_bit(CEPHFS_FEATURE_REPLY_ENCODING, &session->s_features))
- err = parse_reply_info(msg, rinfo, (u64)-1);
+ err = parse_reply_info(session, msg, rinfo, (u64)-1);
else
- err = parse_reply_info(msg, rinfo, session->s_con.peer_features);
+ err = parse_reply_info(session, msg, rinfo, session->s_con.peer_features);
mutex_unlock(&mdsc->mutex);
mutex_lock(&session->s_mutex);
@@ -3678,6 +3780,8 @@ static void send_mds_reconnect(struct ceph_mds_client *mdsc,
if (!reply)
goto fail_nomsg;
+ xa_destroy(&session->s_delegated_inos);
+
mutex_lock(&session->s_mutex);
session->s_state = CEPH_MDS_SESSION_RECONNECTING;
session->s_seq = 0;
diff --git a/fs/ceph/mds_client.h b/fs/ceph/mds_client.h
index f10d342ea585..4c3b71707470 100644
--- a/fs/ceph/mds_client.h
+++ b/fs/ceph/mds_client.h
@@ -23,8 +23,9 @@ enum ceph_feature_type {
CEPHFS_FEATURE_RECLAIM_CLIENT,
CEPHFS_FEATURE_LAZY_CAP_WANTED,
CEPHFS_FEATURE_MULTI_RECONNECT,
+ CEPHFS_FEATURE_DELEG_INO,
- CEPHFS_FEATURE_MAX = CEPHFS_FEATURE_MULTI_RECONNECT,
+ CEPHFS_FEATURE_MAX = CEPHFS_FEATURE_DELEG_INO,
};
/*
@@ -37,6 +38,7 @@ enum ceph_feature_type {
CEPHFS_FEATURE_REPLY_ENCODING, \
CEPHFS_FEATURE_LAZY_CAP_WANTED, \
CEPHFS_FEATURE_MULTI_RECONNECT, \
+ CEPHFS_FEATURE_DELEG_INO, \
\
CEPHFS_FEATURE_MAX, \
}
@@ -201,6 +203,7 @@ struct ceph_mds_session {
struct list_head s_waiting; /* waiting requests */
struct list_head s_unsafe; /* unsafe requests */
+ struct xarray s_delegated_inos;
};
/*
@@ -542,6 +545,7 @@ extern void ceph_mdsc_open_export_target_sessions(struct ceph_mds_client *mdsc,
extern int ceph_trim_caps(struct ceph_mds_client *mdsc,
struct ceph_mds_session *session,
int max_caps);
+
static inline int ceph_wait_on_async_create(struct inode *inode)
{
struct ceph_inode_info *ci = ceph_inode(inode);
@@ -549,4 +553,7 @@ static inline int ceph_wait_on_async_create(struct inode *inode)
return wait_on_bit(&ci->i_ceph_flags, CEPH_ASYNC_CREATE_BIT,
TASK_INTERRUPTIBLE);
}
+
+extern u64 ceph_get_deleg_ino(struct ceph_mds_session *session);
+extern int ceph_restore_deleg_ino(struct ceph_mds_session *session, u64 ino);
#endif
generated by cgit (git 2.34.1) at 2024-06-18 14:52:07 +0000