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authorFabian Frederick <fabf@skynet.be>2017-04-24 22:12:57 +0200
committerAl Viro <viro@zeniv.linux.org.uk>2017-04-26 23:54:06 -0400
commit077e073e8f9ebc6bdd3f3f0324b16db07147a232 (patch)
treece16ea16b55fb4fe3a1404bb1c482b1ce53196d6 /fs/affs/file.c
parenta9d6cfb70f71e3d7fb4fe90db40f965e7096bdab (diff)
fs/affs: bugfix: enable writes on OFS disks
We called unconditionally affs_bread_ino() with create 0 resulting in "error (device ...): get_block(): strange block request 0" when trying to write on AFFS OFS format. This patch adds create parameter to that function. 0 for affs_readpage_ofs() 1 for affs_write_begin_ofs() Bug was found here: https://bugzilla.kernel.org/show_bug.cgi?id=114961 Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/affs/file.c')
-rw-r--r--fs/affs/file.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/affs/file.c b/fs/affs/file.c
index 0deec9cc2362..e5c5de6b85e5 100644
--- a/fs/affs/file.c
+++ b/fs/affs/file.c
@@ -499,7 +499,7 @@ affs_getemptyblk_ino(struct inode *inode, int block)
}
static int
-affs_do_readpage_ofs(struct page *page, unsigned to)
+affs_do_readpage_ofs(struct page *page, unsigned to, int create)
{
struct inode *inode = page->mapping->host;
struct super_block *sb = inode->i_sb;
@@ -518,7 +518,7 @@ affs_do_readpage_ofs(struct page *page, unsigned to)
boff = tmp % bsize;
while (pos < to) {
- bh = affs_bread_ino(inode, bidx, 0);
+ bh = affs_bread_ino(inode, bidx, create);
if (IS_ERR(bh))
return PTR_ERR(bh);
tmp = min(bsize - boff, to - pos);
@@ -620,7 +620,7 @@ affs_readpage_ofs(struct file *file, struct page *page)
memset(page_address(page) + to, 0, PAGE_SIZE - to);
}
- err = affs_do_readpage_ofs(page, to);
+ err = affs_do_readpage_ofs(page, to, 0);
if (!err)
SetPageUptodate(page);
unlock_page(page);
@@ -657,7 +657,7 @@ static int affs_write_begin_ofs(struct file *file, struct address_space *mapping
return 0;
/* XXX: inefficient but safe in the face of short writes */
- err = affs_do_readpage_ofs(page, PAGE_SIZE);
+ err = affs_do_readpage_ofs(page, PAGE_SIZE, 1);
if (err) {
unlock_page(page);
put_page(page);