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08bf1fea79
Using the new interval tree code we add a tree for each lock status list to efficiently track ranged requests. Internally, most operations on a resources lock status list (granted, waiting, converting) then are turned into operations within a given range. There is no API change other than a new call, dlm_lock_range() and a new structure, 'struct dlm_key' to define our range endpoints. Keys can have arbitrary lengths and are compared via memcmp. A ranged blocking ast type is defined so that users of dlm_lock_range() can know which range they are blocking. A rudimentary test, dlmtest.ko is included. TODO: - Update userspace entry points, need to add one for new lock call - Manage backwards compatibility with network protocol Signed-off-by: Mark Fasheh <mfasheh@versity.com>
173 lines
5.1 KiB
C
173 lines
5.1 KiB
C
/******************************************************************************
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*******************************************************************************
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**
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** Copyright (C) 2005-2008 Red Hat, Inc. All rights reserved.
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**
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** This copyrighted material is made available to anyone wishing to use,
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** modify, copy, or redistribute it subject to the terms and conditions
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** of the GNU General Public License v.2.
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**
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*******************************************************************************
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******************************************************************************/
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#include "dlm_internal.h"
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#include "rcom.h"
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#include "util.h"
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#define DLM_ERRNO_EDEADLK 35
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#define DLM_ERRNO_EBADR 53
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#define DLM_ERRNO_EBADSLT 57
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#define DLM_ERRNO_EPROTO 71
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#define DLM_ERRNO_EOPNOTSUPP 95
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#define DLM_ERRNO_ETIMEDOUT 110
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#define DLM_ERRNO_EINPROGRESS 115
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static void header_out(struct dlm_header *hd)
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{
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hd->h_version = cpu_to_le32(hd->h_version);
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hd->h_lockspace = cpu_to_le32(hd->h_lockspace);
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hd->h_nodeid = cpu_to_le32(hd->h_nodeid);
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hd->h_length = cpu_to_le16(hd->h_length);
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}
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static void header_in(struct dlm_header *hd)
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{
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hd->h_version = le32_to_cpu(hd->h_version);
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hd->h_lockspace = le32_to_cpu(hd->h_lockspace);
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hd->h_nodeid = le32_to_cpu(hd->h_nodeid);
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hd->h_length = le16_to_cpu(hd->h_length);
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}
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/* higher errno values are inconsistent across architectures, so select
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one set of values for on the wire */
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static int to_dlm_errno(int err)
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{
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switch (err) {
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case -EDEADLK:
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return -DLM_ERRNO_EDEADLK;
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case -EBADR:
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return -DLM_ERRNO_EBADR;
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case -EBADSLT:
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return -DLM_ERRNO_EBADSLT;
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case -EPROTO:
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return -DLM_ERRNO_EPROTO;
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case -EOPNOTSUPP:
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return -DLM_ERRNO_EOPNOTSUPP;
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case -ETIMEDOUT:
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return -DLM_ERRNO_ETIMEDOUT;
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case -EINPROGRESS:
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return -DLM_ERRNO_EINPROGRESS;
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}
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return err;
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}
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static int from_dlm_errno(int err)
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{
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switch (err) {
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case -DLM_ERRNO_EDEADLK:
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return -EDEADLK;
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case -DLM_ERRNO_EBADR:
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return -EBADR;
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case -DLM_ERRNO_EBADSLT:
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return -EBADSLT;
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case -DLM_ERRNO_EPROTO:
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return -EPROTO;
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case -DLM_ERRNO_EOPNOTSUPP:
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return -EOPNOTSUPP;
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case -DLM_ERRNO_ETIMEDOUT:
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return -ETIMEDOUT;
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case -DLM_ERRNO_EINPROGRESS:
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return -EINPROGRESS;
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}
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return err;
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}
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void dlm_message_out(struct dlm_message *ms)
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{
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header_out(&ms->m_header);
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ms->m_type = cpu_to_le32(ms->m_type);
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ms->m_nodeid = cpu_to_le32(ms->m_nodeid);
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ms->m_pid = cpu_to_le32(ms->m_pid);
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ms->m_lkid = cpu_to_le32(ms->m_lkid);
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ms->m_remid = cpu_to_le32(ms->m_remid);
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ms->m_parent_lkid = cpu_to_le32(ms->m_parent_lkid);
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ms->m_parent_remid = cpu_to_le32(ms->m_parent_remid);
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ms->m_exflags = cpu_to_le32(ms->m_exflags);
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ms->m_sbflags = cpu_to_le32(ms->m_sbflags);
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ms->m_flags = cpu_to_le32(ms->m_flags);
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ms->m_lvbseq = cpu_to_le32(ms->m_lvbseq);
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ms->m_hash = cpu_to_le32(ms->m_hash);
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ms->m_status = cpu_to_le32(ms->m_status);
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ms->m_grmode = cpu_to_le32(ms->m_grmode);
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ms->m_rqmode = cpu_to_le32(ms->m_rqmode);
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ms->m_bastmode = cpu_to_le32(ms->m_bastmode);
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ms->m_asts = cpu_to_le32(ms->m_asts);
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ms->m_result = cpu_to_le32(to_dlm_errno(ms->m_result));
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ms->m_grstart_len = cpu_to_le16(ms->m_grstart_len);
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ms->m_grend_len = cpu_to_le16(ms->m_grend_len);
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ms->m_rqstart_len = cpu_to_le16(ms->m_rqstart_len);
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ms->m_rqend_len = cpu_to_le16(ms->m_rqend_len);
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ms->m_baststart_len = cpu_to_le16(ms->m_baststart_len);
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ms->m_bastend_len = cpu_to_le16(ms->m_bastend_len);
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}
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void dlm_message_in(struct dlm_message *ms)
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{
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header_in(&ms->m_header);
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ms->m_type = le32_to_cpu(ms->m_type);
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ms->m_nodeid = le32_to_cpu(ms->m_nodeid);
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ms->m_pid = le32_to_cpu(ms->m_pid);
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ms->m_lkid = le32_to_cpu(ms->m_lkid);
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ms->m_remid = le32_to_cpu(ms->m_remid);
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ms->m_parent_lkid = le32_to_cpu(ms->m_parent_lkid);
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ms->m_parent_remid = le32_to_cpu(ms->m_parent_remid);
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ms->m_exflags = le32_to_cpu(ms->m_exflags);
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ms->m_sbflags = le32_to_cpu(ms->m_sbflags);
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ms->m_flags = le32_to_cpu(ms->m_flags);
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ms->m_lvbseq = le32_to_cpu(ms->m_lvbseq);
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ms->m_hash = le32_to_cpu(ms->m_hash);
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ms->m_status = le32_to_cpu(ms->m_status);
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ms->m_grmode = le32_to_cpu(ms->m_grmode);
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ms->m_rqmode = le32_to_cpu(ms->m_rqmode);
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ms->m_bastmode = le32_to_cpu(ms->m_bastmode);
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ms->m_asts = le32_to_cpu(ms->m_asts);
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ms->m_result = from_dlm_errno(le32_to_cpu(ms->m_result));
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ms->m_grstart_len = le16_to_cpu(ms->m_grstart_len);
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ms->m_grend_len = le16_to_cpu(ms->m_grend_len);
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ms->m_rqstart_len = le16_to_cpu(ms->m_rqstart_len);
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ms->m_rqend_len = le16_to_cpu(ms->m_rqend_len);
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ms->m_baststart_len = le16_to_cpu(ms->m_baststart_len);
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ms->m_bastend_len = le16_to_cpu(ms->m_bastend_len);
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}
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void dlm_rcom_out(struct dlm_rcom *rc)
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{
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header_out(&rc->rc_header);
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rc->rc_type = cpu_to_le32(rc->rc_type);
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rc->rc_result = cpu_to_le32(rc->rc_result);
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rc->rc_id = cpu_to_le64(rc->rc_id);
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rc->rc_seq = cpu_to_le64(rc->rc_seq);
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rc->rc_seq_reply = cpu_to_le64(rc->rc_seq_reply);
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}
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void dlm_rcom_in(struct dlm_rcom *rc)
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{
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header_in(&rc->rc_header);
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rc->rc_type = le32_to_cpu(rc->rc_type);
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rc->rc_result = le32_to_cpu(rc->rc_result);
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rc->rc_id = le64_to_cpu(rc->rc_id);
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rc->rc_seq = le64_to_cpu(rc->rc_seq);
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rc->rc_seq_reply = le64_to_cpu(rc->rc_seq_reply);
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}
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