X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=ldiskfs%2Fkernel_patches%2Fpatches%2Frhel6.3%2Fext4-force_over_128tb.patch;fp=ldiskfs%2Fkernel_patches%2Fpatches%2Frhel6.3%2Fext4-force_over_128tb.patch;h=e0254b43385b86ab4fdee1f3b2279826e766582d;hb=574a82bd10e27c8246e66a2127b16b7d5e9d8697;hp=0000000000000000000000000000000000000000;hpb=bb188afa0ccf4cb5c810a7a7276d8d27dd03dc27;p=fs%2Flustre-release.git

diff --git a/ldiskfs/kernel_patches/patches/rhel6.3/ext4-force_over_128tb.patch b/ldiskfs/kernel_patches/patches/rhel6.3/ext4-force_over_128tb.patch
new file mode 100644
index 0000000..e0254b4
--- /dev/null
+++ b/ldiskfs/kernel_patches/patches/rhel6.3/ext4-force_over_128tb.patch
@@ -0,0 +1,57 @@
+Index: linux-stage/fs/ext4/super.c
+===================================================================
+--- linux-stage.orig/fs/ext4/super.c	2011-03-11 15:35:15.680343230 +0800
++++ linux-stage/fs/ext4/super.c	2011-03-11 15:44:45.037632078 +0800
+@@ -55,6 +55,8 @@
+ struct proc_dir_entry *ext4_proc_root;
+ static struct kset *ext4_kset;
+ 
++static int force_over_128tb;
++
+ static int ext4_load_journal(struct super_block *, struct ext4_super_block *,
+ 			     unsigned long journal_devnum);
+ static int ext4_commit_super(struct super_block *sb, int sync);
+@@ -1494,7 +1496,7 @@
+	Opt_stripe, Opt_delalloc, Opt_nodelalloc,
+ 	Opt_block_validity, Opt_noblock_validity,
+ 	Opt_inode_readahead_blks, Opt_journal_ioprio,
+-	Opt_mballoc, Opt_bigendian_extents,
++	Opt_mballoc, Opt_bigendian_extents, Opt_force_over_128tb,
+ 	Opt_discard, Opt_nodiscard,
+	Opt_init_inode_table, Opt_noinit_inode_table,
+ };
+@@ -1562,6 +1564,7 @@
+ 	{Opt_auto_da_alloc, "auto_da_alloc"},
+ 	{Opt_noauto_da_alloc, "noauto_da_alloc"},
+ 	{Opt_bigendian_extents, "bigendian_extents"},
++	{Opt_force_over_128tb, "force_over_128tb"},
+ 	{Opt_mballoc, "mballoc"},
+ 	{Opt_discard, "discard"},
+ 	{Opt_nodiscard, "nodiscard"},
+@@ -2008,6 +2011,9 @@
+ 			break;
+ 		case Opt_mballoc:
+ 			break;
++		case Opt_force_over_128tb:
++			force_over_128tb = 1;
++			break;
+ 		default:
+ 			ext4_msg(sb, KERN_ERR,
+ 			       "Unrecognized mount option \"%s\" "
+@@ -3031,6 +3037,16 @@
+ 		goto failed_mount;
+ 	}
+ 
++	if (ext4_blocks_count(es) > (8ULL << 32)) {
++		if (force_over_128tb == 0) {
++			printk(KERN_ERR "EXT4-fs does not support filesystems "
++			       "greater than 128TB and can cause data corruption."
++			       "Use \"force_over_128tb\" mount option to override."
++			       "\n");
++			goto failed_mount;
++		}
++	}
++
+ 	if (EXT4_BLOCKS_PER_GROUP(sb) == 0)
+ 		goto cantfind_ext4;
+