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| author | Thanos Makatos <thanos.makatos@nutanix.com> | 2019-09-20 09:04:39 -0400 |
|---|---|---|
| committer | Thanos <tmakatos@gmail.com> | 2019-09-27 15:59:11 +0100 |
| commit | bea51b1d3bb2f424ded4613840002e1884cff09d (patch) | |
| tree | e71fa90605b5cdbdb46288213fb2d356ed816412 | |
| parent | 4aeaa091be0a870c0b61d8f89849fd4de00922a3 (diff) | |
| download | libvfio-user-bea51b1d3bb2f424ded4613840002e1884cff09d.zip libvfio-user-bea51b1d3bb2f424ded4613840002e1884cff09d.tar.gz libvfio-user-bea51b1d3bb2f424ded4613840002e1884cff09d.tar.bz2 | |
add more debug messages in muser.ko
Signed-off-by: Thanos Makatos <thanos.makatos@nutanix.com>
| -rw-r--r-- | kmod/muser.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/kmod/muser.c b/kmod/muser.c index aaf11db..9e9f19d 100644 --- a/kmod/muser.c +++ b/kmod/muser.c @@ -981,14 +981,17 @@ static ssize_t muser_read(struct mdev_device *mdev, char __user *buf, struct muser_dev *mudev = mdev_get_drvdata(mdev); struct mudev_cmd mucmd = { 0 }; int err; + ssize_t _count; WARN_ON(mudev == NULL); /* Setup mucmd and pin pages of the calling context. */ mucmd.type = MUSER_READ; err = pin_pages(&mucmd, buf, count, 1); - if (err != 0) + if (err != 0) { + muser_dbg("failed to pin pages: %d", err); return err; + } /* Setup muser_cmd for server context. */ mucmd.muser_cmd.type = MUSER_READ; @@ -1162,10 +1165,12 @@ static int muser_ioctl_setup_cmd(struct mudev_cmd *mucmd, unsigned int cmd, err = bounce_fds(mucmd, (void __user *) (arg + minsz), argsz - minsz); if (err) { - muser_dbg("failed to bounce fds: %d\n", err); + muser_dbg("failed to bounce fds: %d", err); return err; } break; + default: + muser_warn("ignore flags=0x%x", flags); } } @@ -1433,6 +1438,8 @@ static inline int maybe_install_fds(struct mudev_cmd *mucmd) if (unlikely(ret)) muser_dbg("failed to install fds: %ld", ret); break; + default: + muser_warn("bad flags=0x%x", flags); /* TODO: SET_DATA_BOOL */ } } @@ -1725,11 +1732,14 @@ static ssize_t libmuser_write(struct file *filp, const char __user *buf, switch (mucmd->type) { case MUSER_READ: + muser_dbg("received data from libmuser"); + dump_buffer(buf, bufsz); ret = bounce_in(mucmd, (void __user *)buf); if (ret) return ret; break; case MUSER_IOCTL: + muser_dbg("received sparse mmap from libmuser"); /* * copy the sparse mmap cap information after the * struct vfio_region_info. @@ -1742,6 +1752,7 @@ static ssize_t libmuser_write(struct file *filp, const char __user *buf, mucmd->pg_map.len -= seek; break; default: + muser_dbg("bad command 0x%x", mucmd->type); return -EINVAL; } |