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afs: Log more information for "kAFS: AFS vnode with undefined type\n" 

Log more information when "kAFS: AFS vnode with undefined type\n" is
displayed due to a vnode record being retrieved from the server that
appears to have a duff file type (usually 0).  This prints more information
to try and help pin down the problem.

Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells 2019-04-25 14:26:52 +01:00
parent 6c6c1d63c2
commit b134d687dd
4 changed files with 36 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
fs/afs/dir.c
View File

@ -776,7 +776,7 @@ static struct inode *afs_do_lookup(struct inode *dir, struct dentry *dentry,
ti = afs_iget(dir->i_sb, key, &cookie->fids[i],
&cookie->statuses[i],
&cookie->callbacks[i],
cbi);
cbi, dvnode);
if (i == 0) {
inode = ti;
} else {
@ -1125,7 +1125,7 @@ static void afs_vnode_new_inode(struct afs_fs_cursor *fc,
return;
inode = afs_iget(fc->vnode->vfs_inode.i_sb, fc->key,
newfid, newstatus, newcb, fc->cbi);
newfid, newstatus, newcb, fc->cbi, fc->vnode);
if (IS_ERR(inode)) {
/* ENOMEM or EINTR at a really inconvenient time - just abandon
* the new directory on the server.

35
fs/afs/inode.c
View File

@ -29,10 +29,36 @@ static const struct inode_operations afs_symlink_inode_operations = {
.listxattr = afs_listxattr,
};
static noinline void dump_vnode(struct afs_vnode *vnode, struct afs_vnode *parent_vnode)
{
static unsigned long once_only;
pr_warn("kAFS: AFS vnode with undefined type %u\n",
vnode->status.type);
pr_warn("kAFS: A=%d m=%o s=%llx v=%llx\n",
vnode->status.abort_code,
vnode->status.mode,
vnode->status.size,
vnode->status.data_version);
pr_warn("kAFS: vnode %llx:%llx:%x\n",
vnode->fid.vid,
vnode->fid.vnode,
vnode->fid.unique);
if (parent_vnode)
pr_warn("kAFS: dir %llx:%llx:%x\n",
parent_vnode->fid.vid,
parent_vnode->fid.vnode,
parent_vnode->fid.unique);
if (!test_and_set_bit(0, &once_only))
dump_stack();
}
/*
* Initialise an inode from the vnode status.
*/
static int afs_inode_init_from_status(struct afs_vnode *vnode, struct key *key)
static int afs_inode_init_from_status(struct afs_vnode *vnode, struct key *key,
struct afs_vnode *parent_vnode)
{
struct inode *inode = AFS_VNODE_TO_I(vnode);
@ -80,7 +106,7 @@ static int afs_inode_init_from_status(struct afs_vnode *vnode, struct key *key)
inode_nohighmem(inode);
break;
default:
printk("kAFS: AFS vnode with undefined type\n");
dump_vnode(vnode, parent_vnode);
read_sequnlock_excl(&vnode->cb_lock);
return afs_protocol_error(NULL, -EBADMSG, afs_eproto_file_type);
}
@ -270,7 +296,8 @@ static void afs_get_inode_cache(struct afs_vnode *vnode)
*/
struct inode *afs_iget(struct super_block *sb, struct key *key,
struct afs_fid *fid, struct afs_file_status *status,
struct afs_callback *cb, struct afs_cb_interest *cbi)
struct afs_callback *cb, struct afs_cb_interest *cbi,
struct afs_vnode *parent_vnode)
{
struct afs_iget_data data = { .fid = *fid };
struct afs_super_info *as;
@ -327,7 +354,7 @@ struct inode *afs_iget(struct super_block *sb, struct key *key,
vnode->cb_expires_at += ktime_get_real_seconds();
}
ret = afs_inode_init_from_status(vnode, key);
ret = afs_inode_init_from_status(vnode, key, parent_vnode);
if (ret < 0)
goto bad_inode;

3
fs/afs/internal.h
View File

@ -993,7 +993,8 @@ extern struct inode *afs_iget_pseudo_dir(struct super_block *, bool);
extern struct inode *afs_iget(struct super_block *, struct key *,
struct afs_fid *, struct afs_file_status *,
struct afs_callback *,
struct afs_cb_interest *);
struct afs_cb_interest *,
struct afs_vnode *);
extern void afs_zap_data(struct afs_vnode *);
extern int afs_validate(struct afs_vnode *, struct key *);
extern int afs_getattr(const struct path *, struct kstat *, u32, unsigned int);

2
fs/afs/super.c
View File

@ -453,7 +453,7 @@ static int afs_fill_super(struct super_block *sb, struct afs_fs_context *ctx)
fid.vnode = 1;
fid.vnode_hi = 0;
fid.unique = 1;
inode = afs_iget(sb, ctx->key, &fid, NULL, NULL, NULL);
inode = afs_iget(sb, ctx->key, &fid, NULL, NULL, NULL, NULL);
}
if (IS_ERR(inode))