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Diffstat (limited to 'fs/smb/server/oplock.c')
-rw-r--r--fs/smb/server/oplock.c126
1 files changed, 93 insertions, 33 deletions
diff --git a/fs/smb/server/oplock.c b/fs/smb/server/oplock.c
index 2292ca6ff0..a8f52c4ebb 100644
--- a/fs/smb/server/oplock.c
+++ b/fs/smb/server/oplock.c
@@ -159,7 +159,8 @@ static struct oplock_info *opinfo_get_list(struct ksmbd_inode *ci)
opinfo = list_first_or_null_rcu(&ci->m_op_list, struct oplock_info,
op_entry);
if (opinfo) {
- if (!atomic_inc_not_zero(&opinfo->refcount))
+ if (opinfo->conn == NULL ||
+ !atomic_inc_not_zero(&opinfo->refcount))
opinfo = NULL;
else {
atomic_inc(&opinfo->conn->r_count);
@@ -206,9 +207,9 @@ static void opinfo_add(struct oplock_info *opinfo)
{
struct ksmbd_inode *ci = opinfo->o_fp->f_ci;
- write_lock(&ci->m_lock);
+ down_write(&ci->m_lock);
list_add_rcu(&opinfo->op_entry, &ci->m_op_list);
- write_unlock(&ci->m_lock);
+ up_write(&ci->m_lock);
}
static void opinfo_del(struct oplock_info *opinfo)
@@ -220,9 +221,9 @@ static void opinfo_del(struct oplock_info *opinfo)
lease_del_list(opinfo);
write_unlock(&lease_list_lock);
}
- write_lock(&ci->m_lock);
+ down_write(&ci->m_lock);
list_del_rcu(&opinfo->op_entry);
- write_unlock(&ci->m_lock);
+ up_write(&ci->m_lock);
}
static unsigned long opinfo_count(struct ksmbd_file *fp)
@@ -525,21 +526,18 @@ static struct oplock_info *same_client_has_lease(struct ksmbd_inode *ci,
* Compare lease key and client_guid to know request from same owner
* of same client
*/
- read_lock(&ci->m_lock);
+ down_read(&ci->m_lock);
list_for_each_entry(opinfo, &ci->m_op_list, op_entry) {
- if (!opinfo->is_lease)
+ if (!opinfo->is_lease || !opinfo->conn)
continue;
- read_unlock(&ci->m_lock);
lease = opinfo->o_lease;
ret = compare_guid_key(opinfo, client_guid, lctx->lease_key);
if (ret) {
m_opinfo = opinfo;
/* skip upgrading lease about breaking lease */
- if (atomic_read(&opinfo->breaking_cnt)) {
- read_lock(&ci->m_lock);
+ if (atomic_read(&opinfo->breaking_cnt))
continue;
- }
/* upgrading lease */
if ((atomic_read(&ci->op_count) +
@@ -569,9 +567,8 @@ static struct oplock_info *same_client_has_lease(struct ksmbd_inode *ci,
lease_none_upgrade(opinfo, lctx->req_state);
}
}
- read_lock(&ci->m_lock);
}
- read_unlock(&ci->m_lock);
+ up_read(&ci->m_lock);
return m_opinfo;
}
@@ -656,7 +653,7 @@ static void __smb2_oplock_break_noti(struct work_struct *wk)
struct smb2_hdr *rsp_hdr;
struct ksmbd_file *fp;
- fp = ksmbd_lookup_durable_fd(br_info->fid);
+ fp = ksmbd_lookup_global_fd(br_info->fid);
if (!fp)
goto out;
@@ -1118,9 +1115,9 @@ void smb_send_parent_lease_break_noti(struct ksmbd_file *fp,
if (!p_ci)
return;
- read_lock(&p_ci->m_lock);
+ down_read(&p_ci->m_lock);
list_for_each_entry(opinfo, &p_ci->m_op_list, op_entry) {
- if (!opinfo->is_lease)
+ if (opinfo->conn == NULL || !opinfo->is_lease)
continue;
if (opinfo->o_lease->state != SMB2_OPLOCK_LEVEL_NONE &&
@@ -1136,13 +1133,11 @@ void smb_send_parent_lease_break_noti(struct ksmbd_file *fp,
continue;
}
- read_unlock(&p_ci->m_lock);
oplock_break(opinfo, SMB2_OPLOCK_LEVEL_NONE);
opinfo_conn_put(opinfo);
- read_lock(&p_ci->m_lock);
}
}
- read_unlock(&p_ci->m_lock);
+ up_read(&p_ci->m_lock);
ksmbd_inode_put(p_ci);
}
@@ -1156,16 +1151,16 @@ void smb_lazy_parent_lease_break_close(struct ksmbd_file *fp)
opinfo = rcu_dereference(fp->f_opinfo);
rcu_read_unlock();
- if (!opinfo->is_lease || opinfo->o_lease->version != 2)
+ if (!opinfo || !opinfo->is_lease || opinfo->o_lease->version != 2)
return;
p_ci = ksmbd_inode_lookup_lock(fp->filp->f_path.dentry->d_parent);
if (!p_ci)
return;
- read_lock(&p_ci->m_lock);
+ down_read(&p_ci->m_lock);
list_for_each_entry(opinfo, &p_ci->m_op_list, op_entry) {
- if (!opinfo->is_lease)
+ if (opinfo->conn == NULL || !opinfo->is_lease)
continue;
if (opinfo->o_lease->state != SMB2_OPLOCK_LEVEL_NONE) {
@@ -1177,13 +1172,11 @@ void smb_lazy_parent_lease_break_close(struct ksmbd_file *fp)
atomic_dec(&opinfo->conn->r_count);
continue;
}
- read_unlock(&p_ci->m_lock);
oplock_break(opinfo, SMB2_OPLOCK_LEVEL_NONE);
opinfo_conn_put(opinfo);
- read_lock(&p_ci->m_lock);
}
}
- read_unlock(&p_ci->m_lock);
+ up_read(&p_ci->m_lock);
ksmbd_inode_put(p_ci);
}
@@ -1377,6 +1370,9 @@ void smb_break_all_levII_oplock(struct ksmbd_work *work, struct ksmbd_file *fp,
rcu_read_lock();
list_for_each_entry_rcu(brk_op, &ci->m_op_list, op_entry) {
+ if (brk_op->conn == NULL)
+ continue;
+
if (!atomic_inc_not_zero(&brk_op->refcount))
continue;
@@ -1513,11 +1509,10 @@ void create_lease_buf(u8 *rbuf, struct lease *lease)
/**
* parse_lease_state() - parse lease context containted in file open request
* @open_req: buffer containing smb2 file open(create) request
- * @is_dir: whether leasing file is directory
*
* Return: oplock state, -ENOENT if create lease context not found
*/
-struct lease_ctx_info *parse_lease_state(void *open_req, bool is_dir)
+struct lease_ctx_info *parse_lease_state(void *open_req)
{
struct create_context *cc;
struct smb2_create_req *req = (struct smb2_create_req *)open_req;
@@ -1535,12 +1530,7 @@ struct lease_ctx_info *parse_lease_state(void *open_req, bool is_dir)
struct create_lease_v2 *lc = (struct create_lease_v2 *)cc;
memcpy(lreq->lease_key, lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
- if (is_dir) {
- lreq->req_state = lc->lcontext.LeaseState &
- ~SMB2_LEASE_WRITE_CACHING_LE;
- lreq->is_dir = true;
- } else
- lreq->req_state = lc->lcontext.LeaseState;
+ lreq->req_state = lc->lcontext.LeaseState;
lreq->flags = lc->lcontext.LeaseFlags;
lreq->epoch = lc->lcontext.Epoch;
lreq->duration = lc->lcontext.LeaseDuration;
@@ -1664,6 +1654,8 @@ void create_durable_v2_rsp_buf(char *cc, struct ksmbd_file *fp)
buf->Name[3] = 'Q';
buf->Timeout = cpu_to_le32(fp->durable_timeout);
+ if (fp->is_persistent)
+ buf->Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
}
/**
@@ -1831,3 +1823,71 @@ out:
read_unlock(&lease_list_lock);
return ret_op;
}
+
+int smb2_check_durable_oplock(struct ksmbd_conn *conn,
+ struct ksmbd_share_config *share,
+ struct ksmbd_file *fp,
+ struct lease_ctx_info *lctx,
+ char *name)
+{
+ struct oplock_info *opinfo = opinfo_get(fp);
+ int ret = 0;
+
+ if (!opinfo)
+ return 0;
+
+ if (opinfo->is_lease == false) {
+ if (lctx) {
+ pr_err("create context include lease\n");
+ ret = -EBADF;
+ goto out;
+ }
+
+ if (opinfo->level != SMB2_OPLOCK_LEVEL_BATCH) {
+ pr_err("oplock level is not equal to SMB2_OPLOCK_LEVEL_BATCH\n");
+ ret = -EBADF;
+ }
+
+ goto out;
+ }
+
+ if (memcmp(conn->ClientGUID, fp->client_guid,
+ SMB2_CLIENT_GUID_SIZE)) {
+ ksmbd_debug(SMB, "Client guid of fp is not equal to the one of connection\n");
+ ret = -EBADF;
+ goto out;
+ }
+
+ if (!lctx) {
+ ksmbd_debug(SMB, "create context does not include lease\n");
+ ret = -EBADF;
+ goto out;
+ }
+
+ if (memcmp(opinfo->o_lease->lease_key, lctx->lease_key,
+ SMB2_LEASE_KEY_SIZE)) {
+ ksmbd_debug(SMB,
+ "lease key of fp does not match lease key in create context\n");
+ ret = -EBADF;
+ goto out;
+ }
+
+ if (!(opinfo->o_lease->state & SMB2_LEASE_HANDLE_CACHING_LE)) {
+ ksmbd_debug(SMB, "lease state does not contain SMB2_LEASE_HANDLE_CACHING\n");
+ ret = -EBADF;
+ goto out;
+ }
+
+ if (opinfo->o_lease->version != lctx->version) {
+ ksmbd_debug(SMB,
+ "lease version of fp does not match the one in create context\n");
+ ret = -EBADF;
+ goto out;
+ }
+
+ if (!ksmbd_inode_pending_delete(fp))
+ ret = ksmbd_validate_name_reconnect(share, fp, name);
+out:
+ opinfo_put(opinfo);
+ return ret;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-07 05:53:45 +0000