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authorMiklos Szeredi <mszeredi@suse.cz>2012-04-26 10:56:36 +0200
committerMiklos Szeredi <mszeredi@suse.cz>2012-04-26 10:56:36 +0200
commit519c6040ce04474bc893774f866fd8d907b20429 (patch)
tree0e114d545be1bc2c432f6256edfc28206a835d1e /fs/fuse
parent05ba1f0823004e947748523782e9c2f07f3bff0d (diff)
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>
Diffstat (limited to 'fs/fuse')
-rw-r--r--fs/fuse/file.c7
-rw-r--r--fs/fuse/fuse_i.h3
2 files changed, 10 insertions, 0 deletions
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index e3fee88831d..bbfd571b37e 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -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;
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index 572cefc7801..f38fb795f03 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -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;