/* * memfd test file-system * This file uses FUSE to create a dummy file-system with only one file /memfd. * This file is read-only and takes 1s per read. * * This file-system is used by the memfd test-cases to force the kernel to pin * pages during reads(). Due to the 1s delay of this file-system, this is a * nice way to test race-conditions against get_user_pages() in the kernel. * * We use direct_io==1 to force the kernel to use direct-IO for this * file-system. */ #define FUSE_USE_VERSION 26 #include #include #include #include #include #include static const char memfd_content[] = "memfd-example-content"; static const char memfd_path[] = "/memfd"; static int memfd_getattr(const char *path, struct stat *st) { memset(st, 0, sizeof(*st)); if (!strcmp(path, "/")) { st->st_mode = S_IFDIR | 0755; st->st_nlink = 2; } else if (!strcmp(path, memfd_path)) { st->st_mode = S_IFREG | 0444; st->st_nlink = 1; st->st_size = strlen(memfd_content); } else { return -ENOENT; } return 0; } static int memfd_readdir(const char *path, void *buf, fuse_fill_dir_t filler, off_t offset, struct fuse_file_info *fi) { if (strcmp(path, "/")) return -ENOENT; filler(buf, ".", NULL, 0); filler(buf, "..", NULL, 0); filler(buf, memfd_path + 1, NULL, 0); return 0; } static int memfd_open(const char *path, struct fuse_file_info *fi) { if (strcmp(path, memfd_path)) return -ENOENT; if ((fi->flags & 3) != O_RDONLY) return -EACCES; /* force direct-IO */ fi->direct_io = 1; return 0; } static int memfd_read(const char *path, char *buf, size_t size, off_t offset, struct fuse_file_info *fi) { size_t len; if (strcmp(path, memfd_path) != 0) return -ENOENT; sleep(1); len = strlen(memfd_content); if (offset < len) { if (offset + size > len) size = len - offset; memcpy(buf, memfd_content + offset, size); } else { size = 0; } return size; } static struct fuse_operations memfd_ops = { .getattr = memfd_getattr, .readdir = memfd_readdir, .open = memfd_open, .read = memfd_read, }; int main(int argc, char *argv[]) { return fuse_main(argc, argv, &memfd_ops, NULL); } de68523599817569c057c7ac1622'>diff
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authorDavid Ahern <dsa@cumulusnetworks.com>2016-12-29 15:29:03 -0800
committerDavid S. Miller <davem@davemloft.net>2016-12-29 22:27:23 -0500
commitf5a0aab84b74de68523599817569c057c7ac1622 (patch)
tree321a7119a443d99853b4d3e747db583ad3a39912 /include/net/scm.h
parent2344ef3c86a7fe41f97bf66c7936001b6132860b (diff)
net: ipv4: dst for local input routes should use l3mdev if relevant
IPv4 output routes already use l3mdev device instead of loopback for dst's if it is applicable. Change local input routes to do the same. This fixes icmp responses for unreachable UDP ports which are directed to the wrong table after commit 9d1a6c4ea43e4 because local_input routes use the loopback device. Moving from ingress device to loopback loses the L3 domain causing responses based on the dst to get to lost. Fixes: 9d1a6c4ea43e4 ("net: icmp_route_lookup should use rt dev to determine L3 domain") Signed-off-by: David Ahern <dsa@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/scm.h')