diff options
| author | Namjae Jeon <linkinjeon@kernel.org> | 2024-05-02 04:07:50 +0300 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2024-05-05 07:53:36 +0300 |
| commit | d1c189c6cb8b0fb7b5ee549237d27889c40c2f8b (patch) | |
| tree | 2dc2729b68216ceedc1fe8a80bcecab318211b29 /fs/smb/server/oplock.c | |
| parent | 97c2ec64667bacc49881d2b2dd9afd4d1c3fbaeb (diff) | |
| download | linux-d1c189c6cb8b0fb7b5ee549237d27889c40c2f8b.tar.xz | |
ksmbd: use rwsem instead of rwlock for lease break
lease break wait for lease break acknowledgment.
rwsem is more suitable than unlock while traversing the list for parent
lease break in ->m_op_list.
Cc: stable@vger.kernel.org
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/smb/server/oplock.c')
| -rw-r--r-- | fs/smb/server/oplock.c | 30 |
1 files changed, 11 insertions, 19 deletions
diff --git a/fs/smb/server/oplock.c b/fs/smb/server/oplock.c index 6fd8cb7064dc..c2abf109010d 100644 --- a/fs/smb/server/oplock.c +++ b/fs/smb/server/oplock.c @@ -207,9 +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) @@ -221,9 +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) @@ -526,21 +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 || !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) + @@ -570,9 +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; } @@ -1114,7 +1110,7 @@ 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->conn == NULL || !opinfo->is_lease) continue; @@ -1132,13 +1128,11 @@ 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); } @@ -1159,7 +1153,7 @@ void smb_lazy_parent_lease_break_close(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->conn == NULL || !opinfo->is_lease) continue; @@ -1173,13 +1167,11 @@ 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); } |