> -----Original Message-----
> From: Tetsuya Mukawa [mailto:mukawa at igel.co.jp]
> Sent: Tuesday, March 24, 2015 4:19 AM
> To: dev at dpdk.org
> Cc: Iremonger, Bernard; Richardson, Bruce; david.marchand at 6wind.com;
> Tetsuya Mukawa
> Subject: [PATCH v2 3/6] eal: Fix memory leaks and needless increment of
> pci_map_addr
>
> This patch fixes following memory leaks.
> - When pci_map_resource() is failed but path is allocated correctly,
> path won't be freed in pci_uio_map_recource().
> - When open() is failed, uio_res won't be freed in
> pci_uio_map_resource().
> - When pci_uio_unmap() is called, path should be freed.
>
> Also, fixes below.
> - When pci_map_resource() is failed, mapaddr will be MAP_FAILED.
> In this case, pci_map_addr should not be incremented in
> pci_uio_map_resource().
> - To shrink code, move close().
> - Remove fail variable.
>
> Signed-off-by: Tetsuya Mukawa <mukawa at igel.co.jp>
> ---
> lib/librte_eal/linuxapp/eal/eal_pci_uio.c | 35
> ++++++++++++++++++-------------
> 1 file changed, 20 insertions(+), 15 deletions(-)
>
> diff --git a/lib/librte_eal/linuxapp/eal/eal_pci_uio.c
> b/lib/librte_eal/linuxapp/eal/eal_pci_uio.c
> index f0277be..0128cec 100644
> --- a/lib/librte_eal/linuxapp/eal/eal_pci_uio.c
> +++ b/lib/librte_eal/linuxapp/eal/eal_pci_uio.c
> @@ -333,7 +333,6 @@ pci_uio_map_resource(struct rte_pci_device *dev)
> maps = uio_res->maps;
> for (i = 0, map_idx = 0; i != PCI_MAX_RESOURCE; i++) {
> int fd;
> - int fail = 0;
>
> /* skip empty BAR */
> phaddr = dev->mem_resource[i].phys_addr; @@ -347,6 +346,11 @@
> pci_uio_map_resource(struct rte_pci_device *dev)
> loc->domain, loc->bus, loc->devid,
> loc->function,
> i);
>
> + /* allocate memory to keep path */
> + maps[map_idx].path = rte_malloc(NULL, strlen(devname) + 1, 0);
> + if (maps[map_idx].path == NULL)
> + goto fail0;
> +
> /*
> * open resource file, to mmap it
> */
> @@ -354,7 +358,7 @@ pci_uio_map_resource(struct rte_pci_device *dev)
> if (fd < 0) {
> RTE_LOG(ERR, EAL, "Cannot open %s: %s\n",
> devname, strerror(errno));
> - return -1;
> + goto fail1;
> }
>
> /* try mapping somewhere close to the end of hugepages */ @@
> -363,23 +367,13 @@
> pci_uio_map_resource(struct rte_pci_device *dev)
>
> mapaddr = pci_map_resource(pci_map_addr, fd, 0,
> (size_t)dev->mem_resource[i].len, 0);
> + close(fd);
> if (mapaddr == MAP_FAILED)
> - fail = 1;
> + goto fail1;
>
> pci_map_addr = RTE_PTR_ADD(mapaddr,
> (size_t)dev->mem_resource[i].len);
>
> - maps[map_idx].path = rte_malloc(NULL, strlen(devname) + 1, 0);
> - if (maps[map_idx].path == NULL)
> - fail = 1;
> -
> - if (fail) {
> - rte_free(uio_res);
> - close(fd);
> - return -1;
> - }
> - close(fd);
> -
> maps[map_idx].phaddr = dev->mem_resource[i].phys_addr;
> maps[map_idx].size = dev->mem_resource[i].len;
> maps[map_idx].addr = mapaddr;
> @@ -394,6 +388,15 @@ pci_uio_map_resource(struct rte_pci_device *dev)
> TAILQ_INSERT_TAIL(uio_res_list, uio_res, next);
>
> return 0;
> +
> +fail1:
> + rte_free(maps[map_idx].path);
> +fail0:
> + for (i = 0; i < map_idx; i++)
Hi Tetsuya,
fail1: falls through to fail0:
Would it be cleaner to drop fail1: and change the for loop in fail0: to
for (i = 0; i <= map_idx; i++)
Regards,
Bernard.
> + rte_free(maps[i].path);
> + rte_free(uio_res);
> +
> + return -1;
> }
>
> #ifdef RTE_LIBRTE_EAL_HOTPLUG
> @@ -405,9 +408,11 @@ pci_uio_unmap(struct mapped_pci_resource *uio_res)
> if (uio_res == NULL)
> return;
>
> - for (i = 0; i != uio_res->nb_maps; i++)
> + for (i = 0; i != uio_res->nb_maps; i++) {
> pci_unmap_resource(uio_res->maps[i].addr,
> (size_t)uio_res->maps[i].size);
> + rte_free(uio_res->maps[i].path);
> + }
> }
>
> static struct mapped_pci_resource *
> --
> 1.9.1
