implement write support for partitions covering only a part of an eraseblock (buffer...

[openwrt.git] / target / linux / generic-2.6 / patches-2.6.30 / 053-squashfs_lzma.patch

diff --git a/target/linux/generic-2.6/patches-2.6.30/053-squashfs_lzma.patch b/target/linux/generic-2.6/patches-2.6.30/053-squashfs_lzma.patch
index b632e05..19deb73 100644 (file)
--- a/target/linux/generic-2.6/patches-2.6.30/053-squashfs_lzma.patch
+++ b/target/linux/generic-2.6/patches-2.6.30/053-squashfs_lzma.patch
@@ -26,7 +26,7 @@
 +config SQUASHFS_SUPPORT_LZMA
 +      bool "Support LZMA compression"
 +      depends on SQUASHFS
-+      select CRYPTO_LZMA
++      select CRYPTO_UNLZMA
 +      help
 +        By default SquashFS uses ZLIB compression, however (if your tools
 +        support it, you can use LZMA instead, which saves space.
@@ -47,7 +47,7 @@
        __le32                  s_magic;
 --- a/fs/squashfs/super.c
 +++ b/fs/squashfs/super.c
-@@ -47,13 +47,65 @@
+@@ -47,13 +47,76 @@
  #include "squashfs.h"
  
  
@@ -81,7 +81,7 @@
 +              crypto_free_pcomp(msblk->tfm);
 +      }
 +#endif
- 
++
 +      return err;
 +}
 +
@@ -90,6 +90,17 @@
 +      int err = -EOPNOTSUPP;
 +
 +#ifdef CONFIG_SQUASHFS_SUPPORT_LZMA
++      struct {
++              struct nlattr nla;
++              int val;
++      } params = {
++              .nla = {
++                      .nla_len        = nla_attr_size(sizeof(int)),
++                      .nla_type       = UNLZMA_DECOMP_OUT_BUFFERS,
++              },
++              .val = (msblk->block_size / PAGE_CACHE_SIZE) + 1
++      };
+ 
 +      msblk->tfm = crypto_alloc_pcomp("lzma", 0,
 +                                      CRYPTO_ALG_ASYNC);
 +      if (IS_ERR(msblk->tfm)) {
@@ -97,7 +108,7 @@
 +              return PTR_ERR(msblk->tfm);
 +      }
 +
-+      err = crypto_decompress_setup(msblk->tfm, NULL, 0);
++      err = crypto_decompress_setup(msblk->tfm, &params, sizeof(params));
 +      if (err) {
 +              ERROR("Failed to set up decompression parameters\n");
 +              crypto_free_pcomp(msblk->tfm);
@@ -115,7 +126,7 @@
  {
        if (major < SQUASHFS_MAJOR) {
                ERROR("Major/Minor mismatch, older Squashfs %d.%d "
-@@ -66,9 +118,6 @@ static int supported_squashfs_filesystem
+@@ -66,9 +129,6 @@ static int supported_squashfs_filesystem
                return -EINVAL;
        }
  
@@ -125,7 +136,7 @@
        return 0;
  }
  
-@@ -83,16 +132,6 @@ static int squashfs_fill_super(struct su
+@@ -83,16 +143,6 @@ static int squashfs_fill_super(struct su
        unsigned short flags;
        unsigned int fragments;
        u64 lookup_table_start;
@@ -142,7 +153,7 @@
        int err;
  
        TRACE("Entered squashfs_fill_superblock\n");
-@@ -104,21 +143,6 @@ static int squashfs_fill_super(struct su
+@@ -104,21 +154,6 @@ static int squashfs_fill_super(struct su
        }
        msblk = sb->s_fs_info;
  
@@ -164,8 +175,15 @@
        sblk = kzalloc(sizeof(*sblk), GFP_KERNEL);
        if (sblk == NULL) {
                ERROR("Failed to allocate squashfs_super_block\n");
-@@ -158,8 +182,21 @@ static int squashfs_fill_super(struct su
+@@ -156,10 +191,28 @@ static int squashfs_fill_super(struct su
+               goto failed_mount;
+       }
  
++      /* Check block size for sanity */
++      msblk->block_size = le32_to_cpu(sblk->block_size);
++      if (msblk->block_size > SQUASHFS_FILE_MAX_SIZE)
++              goto failed_mount;
++
        /* Check the MAJOR & MINOR versions and compression type */
        err = supported_squashfs_filesystem(le16_to_cpu(sblk->s_major),
 -                      le16_to_cpu(sblk->s_minor),
@@ -188,7 +206,19 @@
        if (err < 0)
                goto failed_mount;
  
-@@ -305,21 +342,16 @@ allocate_root:
+@@ -179,11 +232,6 @@ static int squashfs_fill_super(struct su
+                       i_size_read(sb->s_bdev->bd_inode))
+               goto failed_mount;
+ 
+-      /* Check block size for sanity */
+-      msblk->block_size = le32_to_cpu(sblk->block_size);
+-      if (msblk->block_size > SQUASHFS_FILE_MAX_SIZE)
+-              goto failed_mount;
+-
+       /*
+        * Check the system page size is not larger than the filesystem
+        * block size (by default 128K).  This is currently not supported.
+@@ -315,21 +363,16 @@ allocate_root:
        return 0;
  
  failed_mount: