Merge git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86

[linux-2.6-omap-h63xx.git] / fs / ext4 / super.c

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index c89bb8797765b9edd1a8a74a8404216d35b8e969..0072da75221fe0c5ff933943b9ceb5170dcd347f 100644 (file)
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -777,11 +777,10 @@ static struct inode *ext4_nfs_get_inode(struct super_block *sb,
         * Currently we don't know the generation for parent directory, so
         * a generation of 0 means "accept any"
         */
-       inode = iget(sb, ino);
-       if (inode == NULL)
-               return ERR_PTR(-ENOMEM);
-       if (is_bad_inode(inode) ||
-           (generation && inode->i_generation != generation)) {
+       inode = ext4_iget(sb, ino);
+       if (IS_ERR(inode))
+               return ERR_CAST(inode);
+       if (generation && inode->i_generation != generation) {
                iput(inode);
                return ERR_PTR(-ESTALE);
        }
@@ -850,7 +849,6 @@ static struct quotactl_ops ext4_qctl_operations = {
 static const struct super_operations ext4_sops = {
        .alloc_inode    = ext4_alloc_inode,
        .destroy_inode  = ext4_destroy_inode,
-       .read_inode     = ext4_read_inode,
        .write_inode    = ext4_write_inode,
        .dirty_inode    = ext4_dirty_inode,
        .delete_inode   = ext4_delete_inode,
@@ -1805,6 +1803,7 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
        unsigned long journal_devnum = 0;
        unsigned long def_mount_opts;
        struct inode *root;
+       int ret = -EINVAL;
        int blocksize;
        int db_count;
        int i;
@@ -1920,6 +1919,17 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
                printk(KERN_WARNING
                       "EXT4-fs warning: feature flags set on rev 0 fs, "
                       "running e2fsck is recommended\n");
+
+       /*
+        * Since ext4 is still considered development code, we require
+        * that the TEST_FILESYS flag in s->flags be set.
+        */
+       if (!(le32_to_cpu(es->s_flags) & EXT2_FLAGS_TEST_FILESYS)) {
+               printk(KERN_WARNING "EXT4-fs: %s: not marked "
+                      "OK to use with test code.\n", sb->s_id);
+               goto failed_mount;
+       }
+
        /*
         * Check feature flags regardless of the revision level, since we
         * previously didn't change the revision level when setting the flags,
@@ -2237,19 +2247,24 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
         * so we can safely mount the rest of the filesystem now.
         */
 
-       root = iget(sb, EXT4_ROOT_INO);
-       sb->s_root = d_alloc_root(root);
-       if (!sb->s_root) {
+       root = ext4_iget(sb, EXT4_ROOT_INO);
+       if (IS_ERR(root)) {
                printk(KERN_ERR "EXT4-fs: get root inode failed\n");
-               iput(root);
+               ret = PTR_ERR(root);
                goto failed_mount4;
        }
        if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {
-               dput(sb->s_root);
-               sb->s_root = NULL;
+               iput(root);
                printk(KERN_ERR "EXT4-fs: corrupt root inode, run e2fsck\n");
                goto failed_mount4;
        }
+       sb->s_root = d_alloc_root(root);
+       if (!sb->s_root) {
+               printk(KERN_ERR "EXT4-fs: get root dentry failed\n");
+               iput(root);
+               ret = -ENOMEM;
+               goto failed_mount4;
+       }
 
        ext4_setup_super (sb, es, sb->s_flags & MS_RDONLY);
 
@@ -2330,7 +2345,7 @@ out_fail:
        sb->s_fs_info = NULL;
        kfree(sbi);
        lock_kernel();
-       return -EINVAL;
+       return ret;
 }
 
 /*
@@ -2366,8 +2381,8 @@ static journal_t *ext4_get_journal(struct super_block *sb,
         * things happen if we iget() an unused inode, as the subsequent
         * iput() will try to delete it. */
 
-       journal_inode = iget(sb, journal_inum);
-       if (!journal_inode) {
+       journal_inode = ext4_iget(sb, journal_inum);
+       if (IS_ERR(journal_inode)) {
                printk(KERN_ERR "EXT4-fs: no journal found.\n");
                return NULL;
        }
@@ -2380,7 +2395,7 @@ static journal_t *ext4_get_journal(struct super_block *sb,
 
        jbd_debug(2, "Journal inode found at %p: %Ld bytes\n",
                  journal_inode, journal_inode->i_size);
-       if (is_bad_inode(journal_inode) || !S_ISREG(journal_inode->i_mode)) {
+       if (!S_ISREG(journal_inode->i_mode)) {
                printk(KERN_ERR "EXT4-fs: invalid journal inode.\n");
                iput(journal_inode);
                return NULL;