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, 89 insertions, 0 deletions

diff --git a/meta/recipes-devtools/genext2fs/genext2fs-1.4.1/0018-Handle-files-changing-while-we-are-working.patch b/meta/recipes-devtools/genext2fs/genext2fs-1.4.1/0018-Handle-files-changing-while-we-are-working.patch
new file mode 100644
index 0000000000..3ea877c4d4
--- /dev/null
+++ b/meta/recipes-devtools/genext2fs/genext2fs-1.4.1/0018-Handle-files-changing-while-we-are-working.patch
@@ -0,0 +1,89 @@
+Upstream-Status: inappropriate
+
+From fd1f52c435099eab199f2b06eb411aab337d7f47 Mon Sep 17 00:00:00 2001
+From: Corey Minyard <cminyard@mvista.com>
+Date: Tue, 7 Jun 2011 07:29:53 -0500
+Subject: [PATCH 18/19] Handle files changing while we are working
+
+Files may change or be deleted between the lstat and the actual
+operation to read them and put them into the target filesystem.
+Handle this more gracefully.  Warn on file deletions, and handle
+whatever size is read, not whatever size happens to be in the
+inode when we stat-ed it.
+
+Also clear the data to the end of an file's last block, to keep
+things clean.
+---
+ genext2fs.c |   30 ++++++++++++++++++------------
+ 1 files changed, 18 insertions(+), 12 deletions(-)
+
+diff --git a/genext2fs.c b/genext2fs.c
+index 485393c..28ba94f 100644
+--- a/genext2fs.c
++++ b/genext2fs.c
+@@ -1942,19 +1942,30 @@ fs_upgrade_rev1_largefile(filesystem *fs)
+ 
+ // make a file from a FILE*
+ static uint32
+-mkfile_fs(filesystem *fs, uint32 parent_nod, const char *name, uint32 mode, off_t size, FILE *f, uid_t uid, gid_t gid, uint32 ctime, uint32 mtime)
++mkfile_fs(filesystem *fs, uint32 parent_nod, const char *name, uint32 mode, FILE *f, uid_t uid, gid_t gid, uint32 ctime, uint32 mtime)
+ {
+        uint8 * b;
+        uint32 nod = mknod_fs(fs, parent_nod, name, mode|FM_IFREG, uid, gid, 0, 0, ctime, mtime);
+        nod_info *ni;
+        inode *node = get_nod(fs, nod, &ni);
++       off_t size = 0;
+        size_t readbytes;
+        inode_pos ipos;
++       int fullsize;
+ 
+        b = malloc(CB_SIZE);
+        if (!b)
+                error_msg_and_die("mkfile_fs: out of memory");
+        inode_pos_init(fs, &ipos, nod, INODE_POS_TRUNCATE, NULL);
++       readbytes = fread(b, 1, CB_SIZE, f);
++       while (readbytes) {
++               fullsize = rndup(readbytes, BLOCKSIZE);
++               // Fill to end of block with zeros.
++               memset(b + readbytes, 0, fullsize - readbytes);
++               extend_inode_blk(fs, &ipos, b, fullsize / BLOCKSIZE);
++               size += readbytes;
++               readbytes = fread(b, 1, CB_SIZE, f);
++       }
+        if (size > 0x7fffffff) {
+                if (fs->sb->s_rev_level < 1)
+                        fs_upgrade_rev1_largefile(fs);
+@@ -1962,15 +1973,6 @@ mkfile_fs(filesystem *fs, uint32 parent_nod, const char *name, uint32 mode, off_
+        }
+        node->i_dir_acl = size >> 32;
+        node->i_size = size;
+-       while (size) {
+-               readbytes = fread(b, 1, CB_SIZE, f);
+-               if ((size < CB_SIZE && readbytes != size)
+-                   || (size >= CB_SIZE && readbytes != CB_SIZE))
+-                       error_msg_and_die("fread failed");
+-               extend_inode_blk(fs, &ipos, b,
+-                                rndup(readbytes, BLOCKSIZE) / BLOCKSIZE);
+-               size -= readbytes;
+-       }
+        inode_pos_finish(fs, &ipos);
+        put_nod(ni);
+        free(b);
+@@ -2256,8 +2258,12 @@ add2fs_from_dir(filesystem *fs, uint32 this_nod, int squash_uids, int squash_per
+                                        free(lnk);
+                                        break;
+                                case S_IFREG:
+-                                       fh = xfopen(dent->d_name, "rb");
+-                                       nod = mkfile_fs(fs, this_nod, name, mode, st.st_size, fh, uid, gid, ctime, mtime);
++                                       fh = fopen(dent->d_name, "rb");
++                                       if (!fh) {
++                                               error_msg("Unable to open file %s", dent->d_name);
++                                               break;
++                                       }
++                                       nod = mkfile_fs(fs, this_nod, name, mode, fh, uid, gid, ctime, mtime);
+                                        fclose(fh);
+                                        break;
+                                case S_IFDIR:
+-- 
+1.7.4.1
+