/*
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
- * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2004-2006 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.
+ * of the GNU General Public License version 2.
*/
#include <linux/sched.h>
#include <linux/completion.h>
#include <linux/buffer_head.h>
#include <linux/gfs2_ondisk.h>
-#include <asm/semaphore.h>
#include "gfs2.h"
#include "lm_interface.h"
#include "inode.h"
#include "log.h"
#include "meta_io.h"
-#include "page.h"
#include "recovery.h"
#include "rgrp.h"
#include "util.h"
+
+/**
+ * gfs2_pte_inval - Sync and invalidate all PTEs associated with a glock
+ * @gl: the glock
+ *
+ */
+
+static void gfs2_pte_inval(struct gfs2_glock *gl)
+{
+ struct gfs2_inode *ip;
+ struct inode *inode;
+
+ ip = gl->gl_object;
+ inode = &ip->i_inode;
+ if (!ip || !S_ISREG(ip->i_di.di_mode))
+ return;
+
+ if (!test_bit(GIF_PAGED, &ip->i_flags))
+ return;
+
+ unmap_shared_mapping_range(inode->i_mapping, 0, 0);
+
+ if (test_bit(GIF_SW_PAGED, &ip->i_flags))
+ set_bit(GLF_DIRTY, &gl->gl_flags);
+
+ clear_bit(GIF_SW_PAGED, &ip->i_flags);
+}
+
+/**
+ * gfs2_page_inval - Invalidate all pages associated with a glock
+ * @gl: the glock
+ *
+ */
+
+static void gfs2_page_inval(struct gfs2_glock *gl)
+{
+ struct gfs2_inode *ip;
+ struct inode *inode;
+
+ ip = gl->gl_object;
+ inode = &ip->i_inode;
+ if (!ip || !S_ISREG(ip->i_di.di_mode))
+ return;
+
+ truncate_inode_pages(inode->i_mapping, 0);
+ gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), !inode->i_mapping->nrpages);
+ clear_bit(GIF_PAGED, &ip->i_flags);
+}
+
+/**
+ * gfs2_page_sync - Sync the data pages (not metadata) associated with a glock
+ * @gl: the glock
+ * @flags: DIO_START | DIO_WAIT
+ *
+ * Syncs data (not metadata) for a regular file.
+ * No-op for all other types.
+ */
+
+static void gfs2_page_sync(struct gfs2_glock *gl, int flags)
+{
+ struct gfs2_inode *ip;
+ struct inode *inode;
+ struct address_space *mapping;
+ int error = 0;
+
+ ip = gl->gl_object;
+ inode = &ip->i_inode;
+ if (!ip || !S_ISREG(ip->i_di.di_mode))
+ return;
+
+ mapping = inode->i_mapping;
+
+ if (flags & DIO_START)
+ filemap_fdatawrite(mapping);
+ if (!error && (flags & DIO_WAIT))
+ error = filemap_fdatawait(mapping);
+
+ /* Put back any errors cleared by filemap_fdatawait()
+ so they can be caught by someone who can pass them
+ up to user space. */
+
+ if (error == -ENOSPC)
+ set_bit(AS_ENOSPC, &mapping->flags);
+ else if (error)
+ set_bit(AS_EIO, &mapping->flags);
+
+}
+
/**
* meta_go_sync - sync out the metadata for this glock
* @gl: the glock
gfs2_ail_empty_gl(gl);
}
- clear_bit(GLF_SYNC, &gl->gl_flags);
}
/**
gl->gl_vn++;
}
-/**
- * meta_go_demote_ok - Check to see if it's ok to unlock a glock
- * @gl: the glock
- *
- * Returns: 1 if we have no cached data; ok to demote meta glock
- */
-
-static int meta_go_demote_ok(struct gfs2_glock *gl)
-{
- return !gl->gl_aspace->i_mapping->nrpages;
-}
-
/**
* inode_go_xmote_th - promote/demote a glock
* @gl: the glock
gfs2_ail_empty_gl(gl);
}
- clear_bit(GLF_SYNC, &gl->gl_flags);
}
/**
struct gfs2_glock *gl = gh->gh_gl;
struct gfs2_inode *ip = gl->gl_object;
- if (ip && test_bit(GLF_DIRTY, &gl->gl_flags))
- gfs2_inode_attr_in(ip);
+ if (ip) {
+ if (test_bit(GLF_DIRTY, &gl->gl_flags))
+ gfs2_inode_attr_in(ip);
- if (ip)
gfs2_meta_cache_flush(ip);
+ }
}
/**
spin_unlock(&ip->i_spin);
- gfs2_inode_put(ip);
+ iput(&ip->i_inode);
}
/**
static void trans_go_xmote_bh(struct gfs2_glock *gl)
{
struct gfs2_sbd *sdp = gl->gl_sbd;
- struct gfs2_inode *ip = sdp->sd_jdesc->jd_inode->u.generic_ip;
+ struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode);
struct gfs2_glock *j_gl = ip->i_gl;
struct gfs2_log_header head;
int error;
if (gl->gl_state != LM_ST_UNLOCKED &&
test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
- gfs2_meta_cache_flush(sdp->sd_jdesc->jd_inode->u.generic_ip);
+ gfs2_meta_cache_flush(GFS2_I(sdp->sd_jdesc->jd_inode));
j_gl->gl_ops->go_inval(j_gl, DIO_METADATA | DIO_DATA);
error = gfs2_find_jhead(sdp->sd_jdesc, &head);
return !atomic_read(&gl->gl_lvb_count);
}
-struct gfs2_glock_operations gfs2_meta_glops = {
+const struct gfs2_glock_operations gfs2_meta_glops = {
.go_xmote_th = gfs2_glock_xmote_th,
.go_drop_th = gfs2_glock_drop_th,
- .go_sync = meta_go_sync,
- .go_inval = meta_go_inval,
- .go_demote_ok = meta_go_demote_ok,
.go_type = LM_TYPE_META
};
-struct gfs2_glock_operations gfs2_inode_glops = {
+const struct gfs2_glock_operations gfs2_inode_glops = {
.go_xmote_th = inode_go_xmote_th,
.go_xmote_bh = inode_go_xmote_bh,
.go_drop_th = inode_go_drop_th,
.go_type = LM_TYPE_INODE
};
-struct gfs2_glock_operations gfs2_rgrp_glops = {
+const struct gfs2_glock_operations gfs2_rgrp_glops = {
.go_xmote_th = gfs2_glock_xmote_th,
.go_drop_th = gfs2_glock_drop_th,
.go_sync = meta_go_sync,
.go_type = LM_TYPE_RGRP
};
-struct gfs2_glock_operations gfs2_trans_glops = {
+const struct gfs2_glock_operations gfs2_trans_glops = {
.go_xmote_th = trans_go_xmote_th,
.go_xmote_bh = trans_go_xmote_bh,
.go_drop_th = trans_go_drop_th,
.go_type = LM_TYPE_NONDISK
};
-struct gfs2_glock_operations gfs2_iopen_glops = {
+const struct gfs2_glock_operations gfs2_iopen_glops = {
.go_xmote_th = gfs2_glock_xmote_th,
.go_drop_th = gfs2_glock_drop_th,
.go_callback = gfs2_iopen_go_callback,
.go_type = LM_TYPE_IOPEN
};
-struct gfs2_glock_operations gfs2_flock_glops = {
+const struct gfs2_glock_operations gfs2_flock_glops = {
.go_xmote_th = gfs2_glock_xmote_th,
.go_drop_th = gfs2_glock_drop_th,
.go_type = LM_TYPE_FLOCK
};
-struct gfs2_glock_operations gfs2_nondisk_glops = {
+const struct gfs2_glock_operations gfs2_nondisk_glops = {
.go_xmote_th = gfs2_glock_xmote_th,
.go_drop_th = gfs2_glock_drop_th,
.go_type = LM_TYPE_NONDISK
};
-struct gfs2_glock_operations gfs2_quota_glops = {
+const struct gfs2_glock_operations gfs2_quota_glops = {
.go_xmote_th = gfs2_glock_xmote_th,
.go_drop_th = gfs2_glock_drop_th,
.go_demote_ok = quota_go_demote_ok,
.go_type = LM_TYPE_QUOTA
};
-struct gfs2_glock_operations gfs2_journal_glops = {
+const struct gfs2_glock_operations gfs2_journal_glops = {
.go_xmote_th = gfs2_glock_xmote_th,
.go_drop_th = gfs2_glock_drop_th,
.go_type = LM_TYPE_JOURNAL
projects / linux-2.6-block.git / blobdiff