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afs: Add a couple of tracepoints to log I/O errors

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Add a couple of tracepoints to log the production of I/O errors within the AFS
filesystem.

Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells
2018-10-20 00:57:57 +01:00
parent 4ac15ea536
commit f51375cd9e
8 changed files with 114 additions and 16 deletions
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18
fs/afs/dir.c
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@@ -138,6 +138,7 @@ static bool afs_dir_check_page(struct afs_vnode *dvnode, struct page *page,
ntohs(dbuf->blocks[tmp].hdr.magic));
trace_afs_dir_check_failed(dvnode, off, i_size);
kunmap(page);
trace_afs_file_error(dvnode, -EIO, afs_file_error_dir_bad_magic);
goto error;
}
@@ -190,9 +191,11 @@ static struct afs_read *afs_read_dir(struct afs_vnode *dvnode, struct key *key)
retry:
i_size = i_size_read(&dvnode->vfs_inode);
if (i_size < 2048)
return ERR_PTR(-EIO);
if (i_size > 2048 * 1024)
return ERR_PTR(afs_bad(dvnode, afs_file_error_dir_small));
if (i_size > 2048 * 1024) {
trace_afs_file_error(dvnode, -EFBIG, afs_file_error_dir_big);
return ERR_PTR(-EFBIG);
}
_enter("%llu", i_size);
@@ -315,7 +318,8 @@ content_has_grown:
/*
* deal with one block in an AFS directory
*/
static int afs_dir_iterate_block(struct dir_context *ctx,
static int afs_dir_iterate_block(struct afs_vnode *dvnode,
struct dir_context *ctx,
union afs_xdr_dir_block *block,
unsigned blkoff)
{
@@ -365,7 +369,7 @@ static int afs_dir_iterate_block(struct dir_context *ctx,
" (len %u/%zu)",
blkoff / sizeof(union afs_xdr_dir_block),
offset, next, tmp, nlen);
return -EIO;
return afs_bad(dvnode, afs_file_error_dir_over_end);
}
if (!(block->hdr.bitmap[next / 8] &
(1 << (next % 8)))) {
@@ -373,7 +377,7 @@ static int afs_dir_iterate_block(struct dir_context *ctx,
" %u unmarked extension (len %u/%zu)",
blkoff / sizeof(union afs_xdr_dir_block),
offset, next, tmp, nlen);
return -EIO;
return afs_bad(dvnode, afs_file_error_dir_unmarked_ext);
}
_debug("ENT[%zu.%u]: ext %u/%zu",
@@ -442,7 +446,7 @@ static int afs_dir_iterate(struct inode *dir, struct dir_context *ctx,
*/
page = req->pages[blkoff / PAGE_SIZE];
if (!page) {
ret = -EIO;
ret = afs_bad(dvnode, afs_file_error_dir_missing_page);
break;
}
mark_page_accessed(page);
@@ -455,7 +459,7 @@ static int afs_dir_iterate(struct inode *dir, struct dir_context *ctx,
do {
dblock = &dbuf->blocks[(blkoff % PAGE_SIZE) /
sizeof(union afs_xdr_dir_block)];
ret = afs_dir_iterate_block(ctx, dblock, blkoff);
ret = afs_dir_iterate_block(dvnode, ctx, dblock, blkoff);
if (ret != 1) {
kunmap(page);
goto out;