From 5ccb4a78d8c0e27985afec32cc4894d48e7b876e Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Fri, 4 Jun 2010 22:27:38 -0400
Subject: [PATCH] switch minix to ->evict_inode(), fix write_inode/delete_inode
race
We need to wait for completion of possible writeback in progress
before we clear on-disk inode during deletion.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/minix/bitmap.c | 6 ++----
fs/minix/inode.c | 15 ++++++++++-----
2 files changed, 12 insertions(+), 9 deletions(-)
diff --git a/fs/minix/bitmap.c b/fs/minix/bitmap.c
index 482779fe4e7c..3f32bcb0d9bd 100644
--- a/fs/minix/bitmap.c
+++ b/fs/minix/bitmap.c
@@ -200,13 +200,13 @@ void minix_free_inode(struct inode * inode)
ino = inode->i_ino;
if (ino < 1 || ino > sbi->s_ninodes) {
printk("minix_free_inode: inode 0 or nonexistent inode\n");
- goto out;
+ return;
}
bit = ino & ((1<<k) - 1);
ino >>= k;
if (ino >= sbi->s_imap_blocks) {
printk("minix_free_inode: nonexistent imap in superblock\n");
- goto out;
+ return;
}
minix_clear_inode(inode); /* clear on-disk copy */
@@ -217,8 +217,6 @@ void minix_free_inode(struct inode * inode)
printk("minix_free_inode: bit %lu already cleared\n", bit);
spin_unlock(&bitmap_lock);
mark_buffer_dirty(bh);
- out:
- clear_inode(inode); /* clear in-memory copy */
}
struct inode *minix_new_inode(const struct inode *dir, int mode, int *error)
diff --git a/fs/minix/inode.c b/fs/minix/inode.c
index 125062f55ef2..e39d6bf2e8fb 100644
--- a/fs/minix/inode.c
+++ b/fs/minix/inode.c
@@ -24,12 +24,17 @@ static int minix_write_inode(struct inode *inode,
static int minix_statfs(struct dentry *dentry, struct kstatfs *buf);
static int minix_remount (struct super_block * sb, int * flags, char * data);
-static void minix_delete_inode(struct inode *inode)
+static void minix_evict_inode(struct inode *inode)
{
truncate_inode_pages(&inode->i_data, 0);
- inode->i_size = 0;
- minix_truncate(inode);
- minix_free_inode(inode);
+ if (!inode->i_nlink) {
+ inode->i_size = 0;
+ minix_truncate(inode);
+ }
+ invalidate_inode_buffers(inode);
+ end_writeback(inode);
+ if (!inode->i_nlink)
+ minix_free_inode(inode);
}
static void minix_put_super(struct super_block *sb)
@@ -96,7 +101,7 @@ static const struct super_operations minix_sops = {
.alloc_inode = minix_alloc_inode,
.destroy_inode = minix_destroy_inode,
.write_inode = minix_write_inode,
- .delete_inode = minix_delete_inode,
+ .evict_inode = minix_evict_inode,
.put_super = minix_put_super,
.statfs = minix_statfs,
.remount_fs = minix_remount,