Commit e7d54ae83c4ffb63a2481d17f136110ab421afc5
Committed by
Anthony Liguori
1 parent
e8a6aec9
fix asynchronous ioctls
posix_aio_read expect aio requests to return the number of bytes requests to be successfull, so we need to fake this up for ioctls. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
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posix-aio-compat.c
@@ -90,7 +90,16 @@ static size_t handle_aiocb_ioctl(struct qemu_paiocb *aiocb) | @@ -90,7 +90,16 @@ static size_t handle_aiocb_ioctl(struct qemu_paiocb *aiocb) | ||
90 | ret = ioctl(aiocb->aio_fildes, aiocb->aio_ioctl_cmd, aiocb->aio_ioctl_buf); | 90 | ret = ioctl(aiocb->aio_fildes, aiocb->aio_ioctl_cmd, aiocb->aio_ioctl_buf); |
91 | if (ret == -1) | 91 | if (ret == -1) |
92 | return -errno; | 92 | return -errno; |
93 | - return ret; | 93 | + |
94 | + /* | ||
95 | + * This looks weird, but the aio code only consideres a request | ||
96 | + * successfull if it has written the number full number of bytes. | ||
97 | + * | ||
98 | + * Now we overload aio_nbytes as aio_ioctl_cmd for the ioctl command, | ||
99 | + * so in fact we return the ioctl command here to make posix_aio_read() | ||
100 | + * happy.. | ||
101 | + */ | ||
102 | + return aiocb->aio_nbytes; | ||
94 | } | 103 | } |
95 | 104 | ||
96 | #ifdef HAVE_PREADV | 105 | #ifdef HAVE_PREADV |