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fuse: optimize fallocate on permanent failure

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If userspace filesystem doesn't support fallocate, remember this and don't send
request next time.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
This commit is contained in:
Miklos Szeredi 2012-04-26 10:56:36 +02:00
parent 05ba1f0823
commit 519c6040ce
2 changed files with 10 additions and 0 deletions
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7
fs/fuse/file.c
View File

@ -2185,6 +2185,9 @@ long fuse_file_fallocate(struct file *file, int mode, loff_t offset,
};
int err;
if (fc->no_fallocate)
return -EOPNOTSUPP;
req = fuse_get_req(fc);
if (IS_ERR(req))
return PTR_ERR(req);
@ -2196,6 +2199,10 @@ long fuse_file_fallocate(struct file *file, int mode, loff_t offset,
req->in.args[0].value = &inarg;
fuse_request_send(fc, req);
err = req->out.h.error;
if (err == -ENOSYS) {
fc->no_fallocate = 1;
err = -EOPNOTSUPP;
}
fuse_put_request(fc, req);
return err;

3
fs/fuse/fuse_i.h
View File

@ -478,6 +478,9 @@ struct fuse_conn {
/** Are BSD file locking primitives not implemented by fs? */
unsigned no_flock:1;
/** Is fallocate not implemented by fs? */
unsigned no_fallocate:1;
/** The number of requests waiting for completion */
atomic_t num_waiting;