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| author | Frank Ch. Eigler <fche@elastic.org> | 2007-11-04 14:11:15 -0500 |
|---|---|---|
| committer | Frank Ch. Eigler <fche@elastic.org> | 2007-11-04 14:11:15 -0500 |
| commit | 806b26a85d30f59af7dcb0025c68a50bf4bbb352 (patch) | |
| tree | 8b1cc9edab49eda46278199a7027d956549f6ddb /runtime/transport/procfs.c | |
| parent | 24993e4fcae48ca014e6b53f3f9a011c9cfa8f06 (diff) | |
| parent | 600e72b28cc0676dc581b8fc5d54c09772979b79 (diff) | |
| download | systemtap-steved-806b26a85d30f59af7dcb0025c68a50bf4bbb352.tar.gz systemtap-steved-806b26a85d30f59af7dcb0025c68a50bf4bbb352.tar.xz systemtap-steved-806b26a85d30f59af7dcb0025c68a50bf4bbb352.zip | |
Merge branch 'master' of git://sources.redhat.com/git/systemtap
Diffstat (limited to 'runtime/transport/procfs.c')
| -rw-r--r-- | runtime/transport/procfs.c | 14 |
1 files changed, 6 insertions, 8 deletions
diff --git a/runtime/transport/procfs.c b/runtime/transport/procfs.c index 88740847..069e379e 100644 --- a/runtime/transport/procfs.c +++ b/runtime/transport/procfs.c @@ -324,6 +324,8 @@ static int _stp_ctl_send (int type, void *data, int len) } else { while ((err = _stp_ctl_write(type, data, len)) < 0 && trylimit--) msleep (5); + if (err > 0) + wake_up_interruptible(&_stp_ctl_wq); } return err; } @@ -430,23 +432,19 @@ static int _stp_sym_close_cmd (struct inode *inode, struct file *file) return 0; } -static int _stp_ctl_opens = 0; static int _stp_ctl_open_cmd (struct inode *inode, struct file *file) { - /* only allow one reader */ - if (_stp_ctl_opens) + if (_stp_attached) return -1; - _stp_ctl_opens++; - _stp_pid = current->pid; + _stp_attach(); return 0; } static int _stp_ctl_close_cmd (struct inode *inode, struct file *file) { - if (_stp_ctl_opens) - _stp_ctl_opens--; - _stp_pid = 0; + if (_stp_attached) + _stp_detach(); return 0; } |