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fs/adfs: super: fix inode dropping

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When we have write support enabled, we must not drop inodes before they
have been written back, otherwise we lose updates to the filesystem on
umount.  Keep the inodes around unless we are built in read-only mode,
or we are mounted read-only.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Russell King 2019-12-09 11:11:18 +00:00 committed by Al Viro
parent a464152f2e
commit f352064275
1 changed files with 7 additions and 1 deletions
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8
fs/adfs/super.c
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@ -231,6 +231,12 @@ static void adfs_free_inode(struct inode *inode)
kmem_cache_free(adfs_inode_cachep, ADFS_I(inode));
}
static int adfs_drop_inode(struct inode *inode)
{
/* always drop inodes if we are read-only */
return !IS_ENABLED(CONFIG_ADFS_FS_RW) || IS_RDONLY(inode);
}
static void init_once(void *foo)
{
struct adfs_inode_info *ei = (struct adfs_inode_info *) foo;
@ -263,7 +269,7 @@ static void destroy_inodecache(void)
static const struct super_operations adfs_sops = {
.alloc_inode = adfs_alloc_inode,
.free_inode = adfs_free_inode,
.drop_inode = generic_delete_inode,
.drop_inode = adfs_drop_inode,
.write_inode = adfs_write_inode,
.put_super = adfs_put_super,
.statfs = adfs_statfs,