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authorShyam Prasad N <sprasad@microsoft.com>2021-12-08 19:33:19 +0300
committerSteve French <stfrench@microsoft.com>2021-12-18 04:09:06 +0300
commitb774302e885697dde027825f8de9beb985d037bd (patch)
tree1e86703c2bfe19af904ef530d17e4172b12fa064 /fs/cifs/inode.c
parent2585cf9dfaaddf00b069673f27bb3f8530e2039c (diff)
downloadlinux-b774302e885697dde027825f8de9beb985d037bd.tar.xz
cifs: ignore resource_id while getting fscache super cookie
We have a cyclic dependency between fscache super cookie and root inode cookie. The super cookie relies on tcon->resource_id, which gets populated from the root inode number. However, fetching the root inode initializes inode cookie as a child of super cookie, which is yet to be populated. resource_id is only used as auxdata to check the validity of super cookie. We can completely avoid setting resource_id to remove the circular dependency. Since vol creation time and vol serial numbers are used for auxdata, we should be fine. Additionally, there will be auxiliary data check for each inode cookie as well. Fixes: 5bf91ef03d98 ("cifs: wait for tcon resource_id before getting fscache super") CC: David Howells <dhowells@redhat.com> Signed-off-by: Shyam Prasad N <sprasad@microsoft.com> Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/cifs/inode.c')
-rw-r--r--fs/cifs/inode.c13
1 files changed, 0 insertions, 13 deletions
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 96d083db1737..279622e4eb1c 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -1356,11 +1356,6 @@ iget_no_retry:
goto out;
}
-#ifdef CONFIG_CIFS_FSCACHE
- /* populate tcon->resource_id */
- tcon->resource_id = CIFS_I(inode)->uniqueid;
-#endif
-
if (rc && tcon->pipe) {
cifs_dbg(FYI, "ipc connection - fake read inode\n");
spin_lock(&inode->i_lock);
@@ -1375,14 +1370,6 @@ iget_no_retry:
iget_failed(inode);
inode = ERR_PTR(rc);
}
-
- /*
- * The cookie is initialized from volume info returned above.
- * Inside cifs_fscache_get_super_cookie it checks
- * that we do not get super cookie twice.
- */
- cifs_fscache_get_super_cookie(tcon);
-
out:
kfree(path);
free_xid(xid);