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Negative cache failed lookups. This saves a FUSE operation when #56

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merged 1 commit into from
Mar 29, 2021
Merged

Negative cache failed lookups. This saves a FUSE operation when #56

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12 changes: 10 additions & 2 deletions ll.c
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Original file line number Diff line number Diff line change
Expand Up @@ -190,10 +190,18 @@ static void sqfs_ll_op_lookup(fuse_req_t req, fuse_ino_t parent,
return;
}
if (!found) {
fuse_reply_err(req, ENOENT);
/* Returning with zero inode indicates not found with
* timeout, i.e. future lookups of this name will not generate
* fuse requests.
*/
struct fuse_entry_param fentry;
memset(&fentry, 0, sizeof(fentry));
fentry.attr_timeout = fentry.entry_timeout = SQFS_TIMEOUT;
fentry.ino = 0;
fuse_reply_entry(req, &fentry);
return;
}

if (sqfs_inode_get(&lli.ll->fs, &inode, sqfs_dentry_inode(&entry))) {
fuse_reply_err(req, ENOENT);
} else {
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