[GFS2] The core of GFS2
This patch contains all the core files for GFS2.
Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/lm.c b/fs/gfs2/lm.c
new file mode 100644
index 0000000..cc74422
--- /dev/null
+++ b/fs/gfs2/lm.c
@@ -0,0 +1,235 @@
+/*
+ * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
+ * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
+ *
+ * This copyrighted material is made available to anyone wishing to use,
+ * modify, copy, or redistribute it subject to the terms and conditions
+ * of the GNU General Public License v.2.
+ */
+
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/completion.h>
+#include <linux/buffer_head.h>
+#include <linux/delay.h>
+#include <asm/semaphore.h>
+
+#include "gfs2.h"
+#include "glock.h"
+#include "lm.h"
+#include "super.h"
+
+/**
+ * gfs2_lm_mount - mount a locking protocol
+ * @sdp: the filesystem
+ * @args: mount arguements
+ * @silent: if 1, don't complain if the FS isn't a GFS2 fs
+ *
+ * Returns: errno
+ */
+
+int gfs2_lm_mount(struct gfs2_sbd *sdp, int silent)
+{
+ char *proto = sdp->sd_proto_name;
+ char *table = sdp->sd_table_name;
+ int flags = 0;
+ int error;
+
+ if (sdp->sd_args.ar_spectator)
+ flags |= LM_MFLAG_SPECTATOR;
+
+ fs_info(sdp, "Trying to join cluster \"%s\", \"%s\"\n", proto, table);
+
+ error = gfs2_mount_lockproto(proto, table, sdp->sd_args.ar_hostdata,
+ gfs2_glock_cb, sdp,
+ GFS2_MIN_LVB_SIZE, flags,
+ &sdp->sd_lockstruct, &sdp->sd_kobj);
+ if (error) {
+ fs_info(sdp, "can't mount proto=%s, table=%s, hostdata=%s\n",
+ proto, table, sdp->sd_args.ar_hostdata);
+ goto out;
+ }
+
+ if (gfs2_assert_warn(sdp, sdp->sd_lockstruct.ls_lockspace) ||
+ gfs2_assert_warn(sdp, sdp->sd_lockstruct.ls_ops) ||
+ gfs2_assert_warn(sdp, sdp->sd_lockstruct.ls_lvb_size >=
+ GFS2_MIN_LVB_SIZE)) {
+ gfs2_unmount_lockproto(&sdp->sd_lockstruct);
+ goto out;
+ }
+
+ if (sdp->sd_args.ar_spectator)
+ snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s.s", table);
+ else
+ snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s.%u", table,
+ sdp->sd_lockstruct.ls_jid);
+
+ fs_info(sdp, "Joined cluster. Now mounting FS...\n");
+
+ if ((sdp->sd_lockstruct.ls_flags & LM_LSFLAG_LOCAL) &&
+ !sdp->sd_args.ar_ignore_local_fs) {
+ sdp->sd_args.ar_localflocks = 1;
+ sdp->sd_args.ar_localcaching = 1;
+ }
+
+ out:
+ return error;
+}
+
+void gfs2_lm_others_may_mount(struct gfs2_sbd *sdp)
+{
+ if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
+ sdp->sd_lockstruct.ls_ops->lm_others_may_mount(sdp->sd_lockstruct.ls_lockspace);
+}
+
+void gfs2_lm_unmount(struct gfs2_sbd *sdp)
+{
+ if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
+ gfs2_unmount_lockproto(&sdp->sd_lockstruct);
+}
+
+int gfs2_lm_withdraw(struct gfs2_sbd *sdp, char *fmt, ...)
+{
+ va_list args;
+
+ if (test_and_set_bit(SDF_SHUTDOWN, &sdp->sd_flags))
+ return 0;
+
+ va_start(args, fmt);
+ vprintk(fmt, args);
+ va_end(args);
+
+ fs_err(sdp, "about to withdraw from the cluster\n");
+ if (sdp->sd_args.ar_debug)
+ BUG();
+
+ fs_err(sdp, "waiting for outstanding I/O\n");
+
+ /* FIXME: suspend dm device so oustanding bio's complete
+ and all further io requests fail */
+
+ fs_err(sdp, "telling LM to withdraw\n");
+ gfs2_withdraw_lockproto(&sdp->sd_lockstruct);
+ fs_err(sdp, "withdrawn\n");
+ dump_stack();
+
+ return -1;
+}
+
+int gfs2_lm_get_lock(struct gfs2_sbd *sdp, struct lm_lockname *name,
+ lm_lock_t **lockp)
+{
+ int error;
+ if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
+ error = -EIO;
+ else
+ error = sdp->sd_lockstruct.ls_ops->lm_get_lock(sdp->sd_lockstruct.ls_lockspace, name, lockp);
+ return error;
+}
+
+void gfs2_lm_put_lock(struct gfs2_sbd *sdp, lm_lock_t *lock)
+{
+ if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
+ sdp->sd_lockstruct.ls_ops->lm_put_lock(lock);
+}
+
+unsigned int gfs2_lm_lock(struct gfs2_sbd *sdp, lm_lock_t *lock,
+ unsigned int cur_state, unsigned int req_state,
+ unsigned int flags)
+{
+ int ret;
+ if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
+ ret = 0;
+ else
+ ret = sdp->sd_lockstruct.ls_ops->lm_lock(lock,
+ cur_state,
+ req_state, flags);
+ return ret;
+}
+
+unsigned int gfs2_lm_unlock(struct gfs2_sbd *sdp, lm_lock_t *lock,
+ unsigned int cur_state)
+{
+ int ret;
+ if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
+ ret = 0;
+ else
+ ret = sdp->sd_lockstruct.ls_ops->lm_unlock(lock, cur_state);
+ return ret;
+}
+
+void gfs2_lm_cancel(struct gfs2_sbd *sdp, lm_lock_t *lock)
+{
+ if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
+ sdp->sd_lockstruct.ls_ops->lm_cancel(lock);
+}
+
+int gfs2_lm_hold_lvb(struct gfs2_sbd *sdp, lm_lock_t *lock, char **lvbp)
+{
+ int error;
+ if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
+ error = -EIO;
+ else
+ error = sdp->sd_lockstruct.ls_ops->lm_hold_lvb(lock, lvbp);
+ return error;
+}
+
+void gfs2_lm_unhold_lvb(struct gfs2_sbd *sdp, lm_lock_t *lock, char *lvb)
+{
+ if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
+ sdp->sd_lockstruct.ls_ops->lm_unhold_lvb(lock, lvb);
+}
+
+void gfs2_lm_sync_lvb(struct gfs2_sbd *sdp, lm_lock_t *lock, char *lvb)
+{
+ if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
+ sdp->sd_lockstruct.ls_ops->lm_sync_lvb(lock, lvb);
+}
+
+int gfs2_lm_plock_get(struct gfs2_sbd *sdp, struct lm_lockname *name,
+ struct file *file, struct file_lock *fl)
+{
+ int error;
+ if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
+ error = -EIO;
+ else
+ error = sdp->sd_lockstruct.ls_ops->lm_plock_get(
+ sdp->sd_lockstruct.ls_lockspace,
+ name, file, fl);
+ return error;
+}
+
+int gfs2_lm_plock(struct gfs2_sbd *sdp, struct lm_lockname *name,
+ struct file *file, int cmd, struct file_lock *fl)
+{
+ int error;
+ if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
+ error = -EIO;
+ else
+ error = sdp->sd_lockstruct.ls_ops->lm_plock(
+ sdp->sd_lockstruct.ls_lockspace,
+ name, file, cmd, fl);
+ return error;
+}
+
+int gfs2_lm_punlock(struct gfs2_sbd *sdp, struct lm_lockname *name,
+ struct file *file, struct file_lock *fl)
+{
+ int error;
+ if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
+ error = -EIO;
+ else
+ error = sdp->sd_lockstruct.ls_ops->lm_punlock(
+ sdp->sd_lockstruct.ls_lockspace,
+ name, file, fl);
+ return error;
+}
+
+void gfs2_lm_recovery_done(struct gfs2_sbd *sdp, unsigned int jid,
+ unsigned int message)
+{
+ if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
+ sdp->sd_lockstruct.ls_ops->lm_recovery_done(sdp->sd_lockstruct.ls_lockspace, jid, message);
+}
+