LU-13783 ldiskfs: Add support for mainline 5.8 kernel

[fs/lustre-release.git] / ldiskfs / kernel_patches / patches / linux-5.8 / ext4-max-dir-size.patch

diff --git a/ldiskfs/kernel_patches/patches/linux-5.8/ext4-max-dir-size.patch b/ldiskfs/kernel_patches/patches/linux-5.8/ext4-max-dir-size.patch
new file mode 100644 (file)
index 0000000..efdc87c
--- /dev/null
+++ b/ldiskfs/kernel_patches/patches/linux-5.8/ext4-max-dir-size.patch
@@ -0,0 +1,46 @@
+Add a proc interface for max_dir_size.
+
+---
+ fs/ext4/sysfs.c |   10 +++++++++-
+ 1 file changed, 9 insertions(+), 1 deletion(-)
+
+--- a/fs/ext4/sysfs.c
++++ b/fs/ext4/sysfs.c
+@@ -209,6 +209,8 @@ EXT4_ATTR_FUNC(reserved_clusters, 0644);
+ EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, inode_readahead,
+                ext4_sb_info, s_inode_readahead_blks);
+ EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal);
++EXT4_RW_ATTR_SBI_UI(max_dir_size, s_max_dir_size_kb);
++EXT4_RW_ATTR_SBI_UI(max_dir_size_kb, s_max_dir_size_kb);
+ EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats);
+ EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan);
+ EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan);
+@@ -252,6 +254,8 @@ static struct attribute *ext4_attrs[] =
+       ATTR_LIST(reserved_clusters),
+       ATTR_LIST(inode_readahead_blks),
+       ATTR_LIST(inode_goal),
++      ATTR_LIST(max_dir_size),
++      ATTR_LIST(max_dir_size_kb),
+       ATTR_LIST(mb_stats),
+       ATTR_LIST(mb_max_to_scan),
+       ATTR_LIST(mb_min_to_scan),
+@@ -376,7 +380,9 @@ static ssize_t ext4_attr_show(struct kob
+                                       le32_to_cpup(ptr));
+               else
+                       return snprintf(buf, PAGE_SIZE, "%u\n",
+-                                      *((unsigned int *) ptr));
++                                      strcmp("max_dir_size", a->attr.name) ?
++                                      *((unsigned int *) ptr) :
++                                      (*((unsigned int *) ptr)) << 10);
+       case attr_pointer_ul:
+               if (!ptr)
+                       return 0;
+@@ -439,6 +445,8 @@ static ssize_t ext4_attr_store(struct ko
+               ret = kstrtoul(skip_spaces(buf), 0, &t);
+               if (ret)
+                       return ret;
++              if (strcmp("max_dir_size", a->attr.name) == 0)
++                      t >>= 10;
+               if (a->attr_ptr == ptr_ext4_super_block_offset)
+                       *((__le32 *) ptr) = cpu_to_le32(t);
+               else