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afs: Improve dir check failure reports

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Improve the content of directory check failure reports from:

	kAFS: afs_dir_check_page(6d57): bad magic 1/2 is 0000

to dump more information about the individual blocks in a directory page.

Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells 2019-04-25 14:26:51 +01:00
parent d46966013b
commit 445b10289f
1 changed files with 34 additions and 4 deletions
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38
fs/afs/dir.c
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@ -159,6 +159,38 @@ error:
return false;
}
/*
* Check the contents of a directory that we've just read.
*/
static bool afs_dir_check_pages(struct afs_vnode *dvnode, struct afs_read *req)
{
struct afs_xdr_dir_page *dbuf;
unsigned int i, j, qty = PAGE_SIZE / sizeof(union afs_xdr_dir_block);
for (i = 0; i < req->nr_pages; i++)
if (!afs_dir_check_page(dvnode, req->pages[i], req->actual_len))
goto bad;
return true;
bad:
pr_warn("DIR %llx:%llx f=%llx l=%llx al=%llx r=%llx\n",
dvnode->fid.vid, dvnode->fid.vnode,
req->file_size, req->len, req->actual_len, req->remain);
pr_warn("DIR %llx %x %x %x\n",
req->pos, req->index, req->nr_pages, req->offset);
for (i = 0; i < req->nr_pages; i++) {
dbuf = kmap(req->pages[i]);
for (j = 0; j < qty; j++) {
union afs_xdr_dir_block *block = &dbuf->blocks[j];
pr_warn("[%02x] %32phN\n", i * qty + j, block);
}
kunmap(req->pages[i]);
}
return false;
}
/*
* open an AFS directory file
*/
@ -288,10 +320,8 @@ retry:
/* Validate the data we just read. */
ret = -EIO;
for (i = 0; i < req->nr_pages; i++)
if (!afs_dir_check_page(dvnode, req->pages[i],
req->actual_len))
goto error_unlock;
if (!afs_dir_check_pages(dvnode, req))
goto error_unlock;
// TODO: Trim excess pages