X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=fs%2Fgfs2%2Fglops.c;h=b068d10bcb6e75b981eef0b977cd4ca912743960;hb=13d7d84e078f49f08b657a3fba0d7a0b7b44ba65;hp=013bf5f1552f0e00f7feac77220ed6ca69d8463a;hpb=feaa7bba026c181ce071d5a4884f7f9dd26207a1;p=powerpc.git

diff --git a/fs/gfs2/glops.c b/fs/gfs2/glops.c
index 013bf5f155..b068d10bcb 100644
--- a/fs/gfs2/glops.c
+++ b/fs/gfs2/glops.c
@@ -4,7 +4,7 @@
  *
  * 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>
@@ -13,9 +13,9 @@
 #include <linux/completion.h>
 #include <linux/buffer_head.h>
 #include <linux/gfs2_ondisk.h>
+#include <linux/lm_interface.h>
 
 #include "gfs2.h"
-#include "lm_interface.h"
 #include "incore.h"
 #include "bmap.h"
 #include "glock.h"
@@ -23,34 +23,106 @@
 #include "inode.h"
 #include "log.h"
 #include "meta_io.h"
-#include "page.h"
 #include "recovery.h"
 #include "rgrp.h"
 #include "util.h"
+#include "trans.h"
+
+/**
+ * ail_empty_gl - remove all buffers for a given lock from the AIL
+ * @gl: the glock
+ *
+ * None of the buffers should be dirty, locked, or pinned.
+ */
+
+static void gfs2_ail_empty_gl(struct gfs2_glock *gl)
+{
+	struct gfs2_sbd *sdp = gl->gl_sbd;
+	unsigned int blocks;
+	struct list_head *head = &gl->gl_ail_list;
+	struct gfs2_bufdata *bd;
+	struct buffer_head *bh;
+	u64 blkno;
+	int error;
+
+	blocks = atomic_read(&gl->gl_ail_count);
+	if (!blocks)
+		return;
+
+	error = gfs2_trans_begin(sdp, 0, blocks);
+	if (gfs2_assert_withdraw(sdp, !error))
+		return;
+
+	gfs2_log_lock(sdp);
+	while (!list_empty(head)) {
+		bd = list_entry(head->next, struct gfs2_bufdata,
+				bd_ail_gl_list);
+		bh = bd->bd_bh;
+		blkno = bh->b_blocknr;
+		gfs2_assert_withdraw(sdp, !buffer_busy(bh));
+
+		bd->bd_ail = NULL;
+		list_del(&bd->bd_ail_st_list);
+		list_del(&bd->bd_ail_gl_list);
+		atomic_dec(&gl->gl_ail_count);
+		brelse(bh);
+		gfs2_log_unlock(sdp);
+
+		gfs2_trans_add_revoke(sdp, blkno);
+
+		gfs2_log_lock(sdp);
+	}
+	gfs2_assert_withdraw(sdp, !atomic_read(&gl->gl_ail_count));
+	gfs2_log_unlock(sdp);
+
+	gfs2_trans_end(sdp);
+	gfs2_log_flush(sdp, NULL);
+}
+
+/**
+ * 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(inode->i_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);
+}
 
 /**
  * meta_go_sync - sync out the metadata for this glock
  * @gl: the glock
- * @flags: DIO_*
  *
  * Called when demoting or unlocking an EX glock.  We must flush
  * to disk all dirty buffers/pages relating to this glock, and must not
  * not return to caller to demote/unlock the glock until I/O is complete.
  */
 
-static void meta_go_sync(struct gfs2_glock *gl, int flags)
+static void meta_go_sync(struct gfs2_glock *gl)
 {
-	if (!(flags & DIO_METADATA))
-		return;
-
 	if (test_and_clear_bit(GLF_DIRTY, &gl->gl_flags)) {
 		gfs2_log_flush(gl->gl_sbd, gl);
-		gfs2_meta_sync(gl, flags | DIO_START | DIO_WAIT);
-		if (flags & DIO_RELEASE)
-			gfs2_ail_empty_gl(gl);
+		gfs2_meta_sync(gl);
+		gfs2_ail_empty_gl(gl);
 	}
 
-	clear_bit(GLF_SYNC, &gl->gl_flags);
 }
 
 /**
@@ -69,18 +141,6 @@ static void meta_go_inval(struct gfs2_glock *gl, int 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
@@ -111,8 +171,7 @@ static void inode_go_xmote_bh(struct gfs2_glock *gl)
 
 	if (gl->gl_state != LM_ST_UNLOCKED &&
 	    (!gh || !(gh->gh_flags & GL_SKIP))) {
-		error = gfs2_meta_read(gl, gl->gl_name.ln_number, DIO_START,
-				       &bh);
+		error = gfs2_meta_read(gl, gl->gl_name.ln_number, 0, &bh);
 		if (!error)
 			brelse(bh);
 	}
@@ -129,7 +188,6 @@ static void inode_go_xmote_bh(struct gfs2_glock *gl)
 
 static void inode_go_drop_th(struct gfs2_glock *gl)
 {
-	printk(KERN_INFO "drop th %p\n", gl->gl_object);
 	gfs2_pte_inval(gl);
 	gfs2_glock_drop_th(gl);
 }
@@ -137,33 +195,32 @@ static void inode_go_drop_th(struct gfs2_glock *gl)
 /**
  * inode_go_sync - Sync the dirty data and/or metadata for an inode glock
  * @gl: the glock protecting the inode
- * @flags:
  *
  */
 
-static void inode_go_sync(struct gfs2_glock *gl, int flags)
+static void inode_go_sync(struct gfs2_glock *gl)
 {
-	int meta = (flags & DIO_METADATA);
-	int data = (flags & DIO_DATA);
+	struct gfs2_inode *ip = gl->gl_object;
+
+	if (ip && !S_ISREG(ip->i_inode.i_mode))
+		ip = NULL;
 
 	if (test_bit(GLF_DIRTY, &gl->gl_flags)) {
-		if (meta && data) {
-			printk(KERN_INFO "sync all\n");
-			gfs2_page_sync(gl, flags | DIO_START);
-			gfs2_log_flush(gl->gl_sbd, gl);
-			gfs2_meta_sync(gl, flags | DIO_START | DIO_WAIT);
-			gfs2_page_sync(gl, flags | DIO_WAIT);
-			clear_bit(GLF_DIRTY, &gl->gl_flags);
-		} else if (meta) {
-			gfs2_log_flush(gl->gl_sbd, gl);
-			gfs2_meta_sync(gl, flags | DIO_START | DIO_WAIT);
-		} else if (data)
-			gfs2_page_sync(gl, flags | DIO_START | DIO_WAIT);
-		if (flags & DIO_RELEASE)
-			gfs2_ail_empty_gl(gl);
+		gfs2_log_flush(gl->gl_sbd, gl);
+		if (ip)
+			filemap_fdatawrite(ip->i_inode.i_mapping);
+		gfs2_meta_sync(gl);
+		if (ip) {
+			struct address_space *mapping = ip->i_inode.i_mapping;
+			int error = filemap_fdatawait(mapping);
+			if (error == -ENOSPC)
+				set_bit(AS_ENOSPC, &mapping->flags);
+			else if (error)
+				set_bit(AS_EIO, &mapping->flags);
+		}
+		clear_bit(GLF_DIRTY, &gl->gl_flags);
+		gfs2_ail_empty_gl(gl);
 	}
-
-	clear_bit(GLF_SYNC, &gl->gl_flags);
 }
 
 /**
@@ -175,15 +232,20 @@ static void inode_go_sync(struct gfs2_glock *gl, int flags)
 
 static void inode_go_inval(struct gfs2_glock *gl, int flags)
 {
+	struct gfs2_inode *ip = gl->gl_object;
 	int meta = (flags & DIO_METADATA);
-	int data = (flags & DIO_DATA);
 
 	if (meta) {
 		gfs2_meta_inval(gl);
-		gl->gl_vn++;
+		if (ip)
+			set_bit(GIF_INVALID, &ip->i_flags);
+	}
+
+	if (ip && S_ISREG(ip->i_inode.i_mode)) {
+		truncate_inode_pages(ip->i_inode.i_mapping, 0);
+		gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), !ip->i_inode.i_mapping->nrpages);
+		clear_bit(GIF_PAGED, &ip->i_flags);
 	}
-	if (data)
-		gfs2_page_inval(gl);
 }
 
 /**
@@ -225,12 +287,10 @@ static int inode_go_lock(struct gfs2_holder *gh)
 	if (!ip)
 		return 0;
 
-	if (ip->i_vn != gl->gl_vn) {
-		printk(KERN_INFO "refresh inode %p\n", &ip->i_inode);
+	if (test_bit(GIF_INVALID, &ip->i_flags)) {
 		error = gfs2_inode_refresh(ip);
 		if (error)
 			return error;
-		gfs2_inode_attr_in(ip);
 	}
 
 	if ((ip->i_di.di_flags & GFS2_DIF_TRUNC_IN_PROG) &&
@@ -254,9 +314,6 @@ static void inode_go_unlock(struct gfs2_holder *gh)
 	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)
 		gfs2_meta_cache_flush(ip);
 }
@@ -366,13 +423,13 @@ static void trans_go_xmote_bh(struct gfs2_glock *gl)
 	struct gfs2_sbd *sdp = gl->gl_sbd;
 	struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode);
 	struct gfs2_glock *j_gl = ip->i_gl;
-	struct gfs2_log_header head;
+	struct gfs2_log_header_host head;
 	int error;
 
 	if (gl->gl_state != LM_ST_UNLOCKED &&
 	    test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
 		gfs2_meta_cache_flush(GFS2_I(sdp->sd_jdesc->jd_inode));
-		j_gl->gl_ops->go_inval(j_gl, DIO_METADATA | DIO_DATA);
+		j_gl->gl_ops->go_inval(j_gl, DIO_METADATA);
 
 		error = gfs2_find_jhead(sdp->sd_jdesc, &head);
 		if (error)
@@ -420,16 +477,13 @@ static int quota_go_demote_ok(struct gfs2_glock *gl)
 	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
+	.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,
@@ -439,10 +493,10 @@ struct gfs2_glock_operations gfs2_inode_glops = {
 	.go_lock = inode_go_lock,
 	.go_unlock = inode_go_unlock,
 	.go_greedy = inode_greedy,
-	.go_type = LM_TYPE_INODE
+	.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,
@@ -450,45 +504,44 @@ struct gfs2_glock_operations gfs2_rgrp_glops = {
 	.go_demote_ok = rgrp_go_demote_ok,
 	.go_lock = rgrp_go_lock,
 	.go_unlock = rgrp_go_unlock,
-	.go_type = LM_TYPE_RGRP
+	.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
+	.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
+	.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
+	.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
+	.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
+	.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
+	.go_type = LM_TYPE_JOURNAL,
 };