[PATCH] JFS: Support page sizes greater than 4K

jfs has never worked on architecutures where the page size was not 4K.

Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 32 insertions, 1 deletions

diff --git a/fs/jfs/super.c b/fs/jfs/super.c
index 5856866e24fc..0812005364a1 100644
--- a/fs/jfs/super.c
+++ b/fs/jfs/super.c
@@ -210,6 +210,10 @@ static void jfs_put_super(struct super_block *sb)
                 unload_nls(sbi->nls_tab);
         sbi->nls_tab = NULL;
 
+        truncate_inode_pages(sbi->direct_inode->i_mapping, 0);
+        iput(sbi->direct_inode);
+        sbi->direct_inode = NULL;
+
         kfree(sbi);
 }
 
@@ -358,6 +362,12 @@ static int jfs_remount(struct super_block *sb, int *flags, char *data)
         }
 
         if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) {
+                /*
+                 * Invalidate any previously read metadata.  fsck may have
+                 * changed the on-disk data since we mounted r/o
+                 */
+                truncate_inode_pages(JFS_SBI(sb)->direct_inode->i_mapping, 0);
+
                 JFS_SBI(sb)->flag = flag;
                 return jfs_mount_rw(sb, 1);
         }
@@ -428,12 +438,26 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
         sb->s_op = &jfs_super_operations;
         sb->s_export_op = &jfs_export_operations;
 
+        /*
+         * Initialize direct-mapping inode/address-space
+         */
+        inode = new_inode(sb);
+        if (inode == NULL)
+                goto out_kfree;
+        inode->i_ino = 0;
+        inode->i_nlink = 1;
+        inode->i_size = sb->s_bdev->bd_inode->i_size;
+        inode->i_mapping->a_ops = &jfs_metapage_aops;
+        mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);
+
+        sbi->direct_inode = inode;
+
         rc = jfs_mount(sb);
         if (rc) {
                 if (!silent) {
                         jfs_err("jfs_mount failed w/return code = %d", rc);
                 }
-                goto out_kfree;
+                goto out_mount_failed;
         }
         if (sb->s_flags & MS_RDONLY)
                 sbi->log = NULL;
@@ -482,6 +506,13 @@ out_no_rw:
         if (rc) {
                 jfs_err("jfs_umount failed with return code %d", rc);
         }
+out_mount_failed:
+        filemap_fdatawrite(sbi->direct_inode->i_mapping);
+        filemap_fdatawait(sbi->direct_inode->i_mapping);
+        truncate_inode_pages(sbi->direct_inode->i_mapping, 0);
+        make_bad_inode(sbi->direct_inode);
+        iput(sbi->direct_inode);
+        sbi->direct_inode = NULL;
 out_kfree:
         if (sbi->nls_tab)
                 unload_nls(sbi->nls_tab);