diff options
| author | Al Viro <viro@zeniv.linux.org.uk> | 2016-01-23 03:47:47 +0300 |
|---|---|---|
| committer | Mike Marshall <hubcap@omnibond.com> | 2016-01-23 21:03:12 +0300 |
| commit | ed42fe059389daa35a2aa10ec832e9f8d0a9e59e (patch) | |
| tree | 778e6ebb516e7a6301305b077e31ee40d9fe96c2 /fs/orangefs/orangefs-sysfs.c | |
| parent | fee25ce12504ff071254fd213055c3f1d3004622 (diff) | |
| download | linux-ed42fe059389daa35a2aa10ec832e9f8d0a9e59e.tar.xz | |
orangefs: hopefully saner op refcounting and locking
* create with refcount 1
* make op_release() decrement and free if zero (i.e. old put_op()
has become that).
* mark when submitter has given up waiting; from that point nobody
else can move between the lists, change state, etc.
* have daemon read/write_iter grab a reference when picking op
and *always* give it up in the end
* don't put into hash until we know it's been successfully passed to
daemon
* move op->lock _lower_ than htab_in_progress_lock (and make sure
to take it in purge_inprogress_ops())
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
Diffstat (limited to 'fs/orangefs/orangefs-sysfs.c')
| -rw-r--r-- | fs/orangefs/orangefs-sysfs.c | 28 |
1 files changed, 7 insertions, 21 deletions
diff --git a/fs/orangefs/orangefs-sysfs.c b/fs/orangefs/orangefs-sysfs.c index 3d360383ea22..83f4053bd11b 100644 --- a/fs/orangefs/orangefs-sysfs.c +++ b/fs/orangefs/orangefs-sysfs.c @@ -773,10 +773,8 @@ static int sysfs_service_op_show(char *kobj_id, char *buf, void *attr) op_alloc_type = ORANGEFS_VFS_OP_PERF_COUNT; new_op = op_alloc(op_alloc_type); - if (!new_op) { - rc = -ENOMEM; - goto out; - } + if (!new_op) + return -ENOMEM; /* Can't do a service_operation if the client is not running... */ rc = is_daemon_in_service(); @@ -931,11 +929,7 @@ out: } } - /* - * if we got ENOMEM, then op_alloc probably failed... - */ - if (rc != -ENOMEM) - op_release(new_op); + op_release(new_op); return rc; @@ -1039,10 +1033,8 @@ static int sysfs_service_op_store(char *kobj_id, const char *buf, void *attr) kobj_id); new_op = op_alloc(ORANGEFS_VFS_OP_PARAM); - if (!new_op) { - rc = -ENOMEM; - goto out; - } + if (!new_op) + return -EINVAL; /* sic */ /* Can't do a service_operation if the client is not running... */ rc = is_daemon_in_service(); @@ -1269,15 +1261,9 @@ static int sysfs_service_op_store(char *kobj_id, const char *buf, void *attr) } out: - /* - * if we got ENOMEM, then op_alloc probably failed... - */ - if (rc == -ENOMEM) - rc = 0; - else - op_release(new_op); + op_release(new_op); - if (rc == 0) + if (rc == -ENOMEM || rc == 0) rc = -EINVAL; return rc; |