[36/41] fs/adfs: super: fix inode dropping
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Message ID E1ieGwg-0004dx-A6@rmk-PC.armlinux.org.uk
State New
Headers show
Series
  • fs/adfs updates for 5.6
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Commit Message

Russell King Dec. 9, 2019, 11:11 a.m. UTC
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>
---
 fs/adfs/super.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

Patch
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diff --git a/fs/adfs/super.c b/fs/adfs/super.c
index b2455e9ab923..9c93122925cf 100644
--- a/fs/adfs/super.c
+++ b/fs/adfs/super.c
@@ -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,