[PATCH] ufs: restore back support of openstep
This is a fix of regression, which triggered by ~2.6.16.
Patch with name ufs-directory-and-page-cache-from-blocks-to-pages.patch: in
additional to conversation from block to page cache mechanism added new
checks of directory integrity, one of them that directory entry do not
across directory chunks.
But some kinds of UFS: OpenStep UFS and Apple UFS (looks like these are the
same filesystems) have different directory chunk size, then common
UFSes(BSD and Solaris UFS).
So this patch adds ability to works with variable size of directory chunks,
and set it for ufstype=openstep to right size.
Tested on darwin ufs.
Signed-off-by: Evgeniy Dushistov <dushistov@mail.ru>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/ufs/dir.c b/fs/ufs/dir.c
index 433b6f6..a6c0ca9 100644
--- a/fs/ufs/dir.c
+++ b/fs/ufs/dir.c
@@ -106,12 +106,13 @@
char *kaddr = page_address(page);
unsigned offs, rec_len;
unsigned limit = PAGE_CACHE_SIZE;
+ const unsigned chunk_mask = UFS_SB(sb)->s_uspi->s_dirblksize - 1;
struct ufs_dir_entry *p;
char *error;
if ((dir->i_size >> PAGE_CACHE_SHIFT) == page->index) {
limit = dir->i_size & ~PAGE_CACHE_MASK;
- if (limit & (UFS_SECTOR_SIZE - 1))
+ if (limit & chunk_mask)
goto Ebadsize;
if (!limit)
goto out;
@@ -126,7 +127,7 @@
goto Ealign;
if (rec_len < UFS_DIR_REC_LEN(ufs_get_de_namlen(sb, p)))
goto Enamelen;
- if (((offs + rec_len - 1) ^ offs) & ~(UFS_SECTOR_SIZE-1))
+ if (((offs + rec_len - 1) ^ offs) & ~chunk_mask)
goto Espan;
if (fs32_to_cpu(sb, p->d_ino) > (UFS_SB(sb)->s_uspi->s_ipg *
UFS_SB(sb)->s_uspi->s_ncg))
@@ -310,6 +311,7 @@
int namelen = dentry->d_name.len;
struct super_block *sb = dir->i_sb;
unsigned reclen = UFS_DIR_REC_LEN(namelen);
+ const unsigned int chunk_size = UFS_SB(sb)->s_uspi->s_dirblksize;
unsigned short rec_len, name_len;
struct page *page = NULL;
struct ufs_dir_entry *de;
@@ -342,8 +344,8 @@
if ((char *)de == dir_end) {
/* We hit i_size */
name_len = 0;
- rec_len = UFS_SECTOR_SIZE;
- de->d_reclen = cpu_to_fs16(sb, UFS_SECTOR_SIZE);
+ rec_len = chunk_size;
+ de->d_reclen = cpu_to_fs16(sb, chunk_size);
de->d_ino = 0;
goto got_it;
}
@@ -431,7 +433,7 @@
unsigned int offset = pos & ~PAGE_CACHE_MASK;
unsigned long n = pos >> PAGE_CACHE_SHIFT;
unsigned long npages = ufs_dir_pages(inode);
- unsigned chunk_mask = ~(UFS_SECTOR_SIZE - 1);
+ unsigned chunk_mask = ~(UFS_SB(sb)->s_uspi->s_dirblksize - 1);
int need_revalidate = filp->f_version != inode->i_version;
unsigned flags = UFS_SB(sb)->s_flags;
@@ -511,7 +513,7 @@
struct super_block *sb = inode->i_sb;
struct address_space *mapping = page->mapping;
char *kaddr = page_address(page);
- unsigned from = ((char*)dir - kaddr) & ~(UFS_SECTOR_SIZE - 1);
+ unsigned from = ((char*)dir - kaddr) & ~(UFS_SB(sb)->s_uspi->s_dirblksize - 1);
unsigned to = ((char*)dir - kaddr) + fs16_to_cpu(sb, dir->d_reclen);
struct ufs_dir_entry *pde = NULL;
struct ufs_dir_entry *de = (struct ufs_dir_entry *) (kaddr + from);
@@ -556,6 +558,7 @@
struct super_block * sb = dir->i_sb;
struct address_space *mapping = inode->i_mapping;
struct page *page = grab_cache_page(mapping, 0);
+ const unsigned int chunk_size = UFS_SB(sb)->s_uspi->s_dirblksize;
struct ufs_dir_entry * de;
char *base;
int err;
@@ -563,7 +566,7 @@
if (!page)
return -ENOMEM;
kmap(page);
- err = mapping->a_ops->prepare_write(NULL, page, 0, UFS_SECTOR_SIZE);
+ err = mapping->a_ops->prepare_write(NULL, page, 0, chunk_size);
if (err) {
unlock_page(page);
goto fail;
@@ -584,11 +587,11 @@
((char *)de + fs16_to_cpu(sb, de->d_reclen));
de->d_ino = cpu_to_fs32(sb, dir->i_ino);
ufs_set_de_type(sb, de, dir->i_mode);
- de->d_reclen = cpu_to_fs16(sb, UFS_SECTOR_SIZE - UFS_DIR_REC_LEN(1));
+ de->d_reclen = cpu_to_fs16(sb, chunk_size - UFS_DIR_REC_LEN(1));
ufs_set_de_namlen(sb, de, 2);
strcpy (de->d_name, "..");
- err = ufs_commit_chunk(page, 0, UFS_SECTOR_SIZE);
+ err = ufs_commit_chunk(page, 0, chunk_size);
fail:
kunmap(page);
page_cache_release(page);
