[PATCH 5/8] fs/ntfs3: Use kvmalloc instead of kmalloc(... __GFP_NOWARN)

[Konstantin Komarov <almaz.alexandrovich@xxxxxxxxxxxxxxxxxxxx>]

Signed-off-by: Konstantin Komarov <almaz.alexandrovich@xxxxxxxxxxxxxxxxxxxx>
---
 fs/ntfs3/attrlist.c | 15 +++++++++++++--
 fs/ntfs3/bitmap.c   |  3 ++-
 fs/ntfs3/super.c    |  2 +-
 3 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/fs/ntfs3/attrlist.c b/fs/ntfs3/attrlist.c
index 42631b31adf1..7c01735d1219 100644
--- a/fs/ntfs3/attrlist.c
+++ b/fs/ntfs3/attrlist.c
@@ -52,7 +52,8 @@ int ntfs_load_attr_list(struct ntfs_inode *ni, struct 
ATTRIB *attr)

     if (!attr->non_res) {
         lsize = le32_to_cpu(attr->res.data_size);
-        le = kmalloc(al_aligned(lsize), GFP_NOFS | __GFP_NOWARN);
+        /* attr is resident: lsize < record_size (1K or 4K) */
+        le = kvmalloc(al_aligned(lsize), GFP_KERNEL);
         if (!le) {
             err = -ENOMEM;
             goto out;
@@ -80,7 +81,17 @@ int ntfs_load_attr_list(struct ntfs_inode *ni, struct 
ATTRIB *attr)
         if (err < 0)
             goto out;

-        le = kmalloc(al_aligned(lsize), GFP_NOFS | __GFP_NOWARN);
+        /* attr is nonresident.
+         * The worst case:
+         * 1T (2^40) extremely fragmented file.
+         * cluster = 4K (2^12) => 2^28 fragments
+         * 2^9 fragments per one record => 2^19 records
+         * 2^5 bytes of ATTR_LIST_ENTRY per one record => 2^24 bytes.
+         *
+         * the result is 16M bytes per attribute list.
+         * Use kvmalloc to allocate in range [several Kbytes - dozen 
Mbytes]
+         */
+        le = kvmalloc(al_aligned(lsize), GFP_KERNEL);
         if (!le) {
             err = -ENOMEM;
             goto out;
diff --git a/fs/ntfs3/bitmap.c b/fs/ntfs3/bitmap.c
index 107e808e06ea..d66055e30aff 100644
--- a/fs/ntfs3/bitmap.c
+++ b/fs/ntfs3/bitmap.c
@@ -659,7 +659,8 @@ int wnd_init(struct wnd_bitmap *wnd, struct 
super_block *sb, size_t nbits)
         wnd->bits_last = wbits;

     wnd->free_bits =
-        kcalloc(wnd->nwnd, sizeof(u16), GFP_NOFS | __GFP_NOWARN);
+        kvmalloc_array(wnd->nwnd, sizeof(u16), GFP_KERNEL | __GFP_ZERO);
+
     if (!wnd->free_bits)
         return -ENOMEM;

diff --git a/fs/ntfs3/super.c b/fs/ntfs3/super.c
index da739e509269..0034952b9ccd 100644
--- a/fs/ntfs3/super.c
+++ b/fs/ntfs3/super.c
@@ -1373,7 +1373,7 @@ static int ntfs_fill_super(struct super_block *sb, 
struct fs_context *fc)
     }

     bytes = inode->i_size;
-    sbi->def_table = t = kmalloc(bytes, GFP_NOFS | __GFP_NOWARN);
+    sbi->def_table = t = kvmalloc(bytes, GFP_KERNEL);
     if (!t) {
         err = -ENOMEM;
         goto put_inode_out;
--
2.34.1