From: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH] Add 4G-1 file support to FAT32
Date: Sun, 30 Jun 2002 00:41:49 +0900 [thread overview]
Message-ID: <87d6ua3xdu.fsf@devron.myhome.or.jp> (raw)
Hi,
This patch changes cont_prepare_write(), in order to support a large
file.
int cont_prepare_write(struct page *page, unsigned offset,
- unsigned to, get_block_t *get_block, unsigned long *bytes)
+ unsigned to, get_block_t *get_block, loff_t *bytes)
And it adds 4G-1 file support to FAT32.
Please apply.
--
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
diff -urN linux-2.5.24/fs/buffer.c fat_big-file-2.5.24/fs/buffer.c
--- linux-2.5.24/fs/buffer.c Sun Jun 23 15:43:09 2002
+++ fat_big-file-2.5.24/fs/buffer.c Sun Jun 23 15:31:44 2002
@@ -1930,7 +1930,7 @@
*/
int cont_prepare_write(struct page *page, unsigned offset,
- unsigned to, get_block_t *get_block, unsigned long *bytes)
+ unsigned to, get_block_t *get_block, loff_t *bytes)
{
struct address_space *mapping = page->mapping;
struct inode *inode = mapping->host;
diff -urN linux-2.5.24/fs/fat/file.c fat_big-file-2.5.24/fs/fat/file.c
--- linux-2.5.24/fs/fat/file.c Sun Jun 23 15:43:10 2002
+++ fat_big-file-2.5.24/fs/fat/file.c Sun Jun 23 15:31:45 2002
@@ -54,7 +54,7 @@
}
if (!create)
return 0;
- if (iblock << sb->s_blocksize_bits != MSDOS_I(inode)->mmu_private) {
+ if (iblock != MSDOS_I(inode)->mmu_private >> sb->s_blocksize_bits) {
BUG();
return -EIO;
}
diff -urN linux-2.5.24/fs/fat/inode.c fat_big-file-2.5.24/fs/fat/inode.c
--- linux-2.5.24/fs/fat/inode.c Sun Jun 23 15:43:10 2002
+++ fat_big-file-2.5.24/fs/fat/inode.c Sun Jun 23 15:31:45 2002
@@ -417,7 +417,7 @@
}
inode->i_blksize = 1 << sbi->cluster_bits;
inode->i_blocks = ((inode->i_size + inode->i_blksize - 1)
- & ~(inode->i_blksize - 1)) >> 9;
+ & ~((loff_t)inode->i_blksize - 1)) >> 9;
MSDOS_I(inode)->i_logstart = 0;
MSDOS_I(inode)->mmu_private = inode->i_size;
@@ -775,6 +775,8 @@
sbi->fat_length = CF_LE_L(b->fat32_length);
sbi->root_cluster = CF_LE_L(b->root_cluster);
+ sb->s_maxbytes = 0xffffffff;
+
/* MC - if info_sector is 0, don't multiply by 0 */
sbi->fsinfo_sector = CF_LE_W(b->info_sector);
if (sbi->fsinfo_sector == 0)
@@ -1063,7 +1065,7 @@
/* this is as close to the truth as we can get ... */
inode->i_blksize = 1 << sbi->cluster_bits;
inode->i_blocks = ((inode->i_size + inode->i_blksize - 1)
- & ~(inode->i_blksize - 1)) >> 9;
+ & ~((loff_t)inode->i_blksize - 1)) >> 9;
inode->i_mtime = inode->i_atime =
date_dos2unix(CF_LE_W(de->time),CF_LE_W(de->date));
inode->i_ctime =
diff -urN linux-2.5.24/include/linux/buffer_head.h fat_big-file-2.5.24/include/linux/buffer_head.h
--- linux-2.5.24/include/linux/buffer_head.h Sun Jun 23 15:43:30 2002
+++ fat_big-file-2.5.24/include/linux/buffer_head.h Sun Jun 23 15:32:04 2002
@@ -180,7 +180,7 @@
int block_read_full_page(struct page*, get_block_t*);
int block_prepare_write(struct page*, unsigned, unsigned, get_block_t*);
int cont_prepare_write(struct page*, unsigned, unsigned, get_block_t*,
- unsigned long *);
+ loff_t *);
int generic_cont_expand(struct inode *inode, loff_t size) ;
int block_commit_write(struct page *page, unsigned from, unsigned to);
int block_sync_page(struct page *);
diff -urN linux-2.5.24/include/linux/msdos_fs_i.h fat_big-file-2.5.24/include/linux/msdos_fs_i.h
--- linux-2.5.24/include/linux/msdos_fs_i.h Sun Jun 23 15:43:31 2002
+++ fat_big-file-2.5.24/include/linux/msdos_fs_i.h Sun Jun 23 15:32:06 2002
@@ -8,7 +8,7 @@
*/
struct msdos_inode_info {
- unsigned long mmu_private;
+ loff_t mmu_private;
int i_start; /* first cluster or 0 */
int i_logstart; /* logical first cluster */
int i_attrs; /* unused attribute bits */
reply other threads:[~2002-06-29 15:39 UTC|newest]
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