genext2fs: support large files and filesystems without using large amounts of memory

update_to_1.95.patch was generated by making a diff bewteen the 1.4.1 release
and the latest 1.9.5 version in the cvs repo:
http://genext2fs.cvs.sourceforge.net/viewvc/genext2fs/genext2fs/genext2fs.c?revision=1.95

The patches 0001-0019 come from mailing list of genext2fs-devel
http://sourceforge.net/mailarchive/forum.php?forum_name=genext2fs-devel&max_rows=100&style=flat&viewmonth=201106

(From OE-Core rev: 8f17e499cf91191727c8767e839738cb39c21655)

Signed-off-by: Dexuan Cui <dexuan.cui@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 95 insertions, 0 deletions

diff --git a/meta/recipes-devtools/genext2fs/genext2fs-1.4.1/0008-Separate-out-the-creation-of-the-filesystem-structur.patch b/meta/recipes-devtools/genext2fs/genext2fs-1.4.1/0008-Separate-out-the-creation-of-the-filesystem-structur.patch
new file mode 100644
index 0000000000..25adeb63c0
--- /dev/null
+++ b/meta/recipes-devtools/genext2fs/genext2fs-1.4.1/0008-Separate-out-the-creation-of-the-filesystem-structur.patch
@@ -0,0 +1,95 @@
+Upstream-Status: inappropriate
+
+From 797e8548e5857b7a0586b27a9bdcadbea1561d8d Mon Sep 17 00:00:00 2001
+From: Corey Minyard <cminyard@mvista.com>
+Date: Sun, 5 Jun 2011 14:53:57 -0500
+Subject: [PATCH 08/19] Separate out the creation of the filesystem structure.
+
+Consolidate some processing that occurs when allocating a filesystem
+structure.
+---
+ genext2fs.c |   49 +++++++++++++++++++++++++------------------------
+ 1 files changed, 25 insertions(+), 24 deletions(-)
+
+diff --git a/genext2fs.c b/genext2fs.c
+index d130362..497c9af 100644
+--- a/genext2fs.c
++++ b/genext2fs.c
+@@ -2240,6 +2240,29 @@ swap_badfs(filesystem *fs)
+        }
+ }
+ 
++// Allocate a new filesystem structure, allocate internal memory,
++// and initialize the contents.
++static filesystem *
++alloc_fs(uint32 nbblocks)
++{
++       filesystem *fs;
++
++       fs = malloc(sizeof(*fs));
++       if (!fs)
++               error_msg_and_die("not enough memory for filesystem");
++       memset(fs, 0, sizeof(*fs));
++       if(!(fs->data = calloc(nbblocks, BLOCKSIZE)))
++               error_msg_and_die("not enough memory for filesystem");
++       fs->hdlink_cnt = HDLINK_CNT;
++       fs->hdlinks.hdl = calloc(sizeof(struct hdlink_s), fs->hdlink_cnt);
++       if (!fs->hdlinks.hdl)
++               error_msg_and_die("Not enough memory");
++       fs->hdlinks.count = 0 ;
++       fs->sb = (superblock *) (fs->data + BLOCKSIZE);
++       fs->gd = (groupdescriptor *) (fs->sb + 1);
++       return fs;
++}
++
+ // initialize an empty filesystem
+ static filesystem *
+ init_fs(int nbblocks, int nbinodes, int nbresrvd, int holes, uint32 fs_timestamp)
+@@ -2290,21 +2313,10 @@ init_fs(int nbblocks, int nbinodes, int nbresrvd, int holes, uint32 fs_timestamp
+        free_blocks = nbblocks - overhead_per_group*nbgroups - 1 /*boot block*/;
+        free_blocks_per_group = nbblocks_per_group - overhead_per_group;
+ 
+-       fs = malloc(sizeof(*fs));
+-       if (!fs)
+-               error_msg_and_die("not enough memory for filesystem");
++       fs = alloc_fs(nbblocks);
+        fs->nheadblocks = (((nbgroups * sizeof(groupdescriptor))
+                            + sizeof(superblock) + (BLOCKSIZE - 1))
+                           / BLOCKSIZE);
+-       if(!(fs->data = calloc(nbblocks, BLOCKSIZE)))
+-               error_msg_and_die("not enough memory for filesystem");
+-       fs->hdlink_cnt = HDLINK_CNT;
+-       fs->hdlinks.hdl = calloc(sizeof(struct hdlink_s), fs->hdlink_cnt);
+-       if (!fs->hdlinks.hdl)
+-               error_msg_and_die("Not enough memory");
+-       fs->hdlinks.count = 0 ;
+-       fs->sb = (superblock *) (fs->data + BLOCKSIZE);
+-       fs->gd = (groupdescriptor *) (fs->sb + 1);
+ 
+        // create the superblock for an empty filesystem
+        fs->sb->s_inodes_count = nbinodes_per_group * nbgroups;
+@@ -2442,20 +2454,9 @@ load_fs(FILE * fh, int swapit)
+        fssize = (fssize + BLOCKSIZE - 1) / BLOCKSIZE;
+        if(fssize < 16) // totally arbitrary
+                error_msg_and_die("too small filesystem");
+-       fs = malloc(sizeof(*fs));
+-       if (!fs)
+-               error_msg_and_die("not enough memory for filesystem");
+-       fs->hdlink_cnt = HDLINK_CNT;
+-       fs->hdlinks.hdl = calloc(sizeof(struct hdlink_s), fs->hdlink_cnt);
+-       if (!fs->hdlinks.hdl)
+-               error_msg_and_die("Not enough memory");
+-       fs->hdlinks.count = 0 ;
+-       if(!(fs->data = calloc(fssize, BLOCKSIZE)))
+-               error_msg_and_die("not enough memory for filesystem");
++       fs = alloc_fs(fssize);
+        if(fread(fs->data, BLOCKSIZE, fssize, fh) != fssize)
+                perror_msg_and_die("input filesystem image");
+-       fs->sb = (superblock *) (fs->data + BLOCKSIZE);
+-       fs->gd = (groupdescriptor *) (fs->sb + 1);
+ 
+        if(swapit)
+                swap_badfs(fs);
+-- 
+1.7.4.1
+