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fuse: optimize fallocate on permanent failure
If userspace filesystem doesn't support fallocate, remember this and don't send request next time. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
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05ba1f0823
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2 changed files with 10 additions and 0 deletions
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@ -2185,6 +2185,9 @@ long fuse_file_fallocate(struct file *file, int mode, loff_t offset,
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};
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int err;
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if (fc->no_fallocate)
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return -EOPNOTSUPP;
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req = fuse_get_req(fc);
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if (IS_ERR(req))
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return PTR_ERR(req);
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@ -2196,6 +2199,10 @@ long fuse_file_fallocate(struct file *file, int mode, loff_t offset,
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req->in.args[0].value = &inarg;
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fuse_request_send(fc, req);
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err = req->out.h.error;
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if (err == -ENOSYS) {
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fc->no_fallocate = 1;
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err = -EOPNOTSUPP;
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}
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fuse_put_request(fc, req);
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return err;
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@ -478,6 +478,9 @@ struct fuse_conn {
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/** Are BSD file locking primitives not implemented by fs? */
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unsigned no_flock:1;
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/** Is fallocate not implemented by fs? */
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unsigned no_fallocate:1;
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/** The number of requests waiting for completion */
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atomic_t num_waiting;
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