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Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf

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Daniel Borkmann says:

====================
pull-request: bpf 2018-06-12

The following pull-request contains BPF updates for your *net* tree.

The main changes are:

1) Avoid an allocation warning in AF_XDP by adding __GFP_NOWARN for the
   umem setup, from Björn.

2) Silence a warning in bpf fs when an application tries to open(2) a
   pinned bpf obj due to missing fops. Add a dummy open fop that continues
   to just bail out in such case, from Daniel.

3) Fix a BPF selftest urandom_read build issue where gcc complains that
   it gets built twice, from Anders.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2018-06-11 17:37:03 -07:00
commit 0ca69d1399
3 changed files with 15 additions and 6 deletions
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14
kernel/bpf/inode.c
View File

@ -295,6 +295,15 @@ static const struct file_operations bpffs_map_fops = {
.release = bpffs_map_release, .release = bpffs_map_release,
}; };
static int bpffs_obj_open(struct inode *inode, struct file *file)
{
return -EIO;
}
static const struct file_operations bpffs_obj_fops = {
.open = bpffs_obj_open,
};
static int bpf_mkobj_ops(struct dentry *dentry, umode_t mode, void *raw, static int bpf_mkobj_ops(struct dentry *dentry, umode_t mode, void *raw,
const struct inode_operations *iops, const struct inode_operations *iops,
const struct file_operations *fops) const struct file_operations *fops)
@ -314,7 +323,8 @@ static int bpf_mkobj_ops(struct dentry *dentry, umode_t mode, void *raw,
static int bpf_mkprog(struct dentry *dentry, umode_t mode, void *arg) static int bpf_mkprog(struct dentry *dentry, umode_t mode, void *arg)
{ {
return bpf_mkobj_ops(dentry, mode, arg, &bpf_prog_iops, NULL); return bpf_mkobj_ops(dentry, mode, arg, &bpf_prog_iops,
&bpffs_obj_fops);
} }
static int bpf_mkmap(struct dentry *dentry, umode_t mode, void *arg) static int bpf_mkmap(struct dentry *dentry, umode_t mode, void *arg)
@ -322,7 +332,7 @@ static int bpf_mkmap(struct dentry *dentry, umode_t mode, void *arg)
struct bpf_map *map = arg; struct bpf_map *map = arg;
return bpf_mkobj_ops(dentry, mode, arg, &bpf_map_iops, return bpf_mkobj_ops(dentry, mode, arg, &bpf_map_iops,
map->btf ? &bpffs_map_fops : NULL); map->btf ? &bpffs_map_fops : &bpffs_obj_fops);
} }
static struct dentry * static struct dentry *

3
net/xdp/xdp_umem.c
View File

@ -204,7 +204,8 @@ static int xdp_umem_pin_pages(struct xdp_umem *umem)
long npgs; long npgs;
int err; int err;
umem->pgs = kcalloc(umem->npgs, sizeof(*umem->pgs), GFP_KERNEL); umem->pgs = kcalloc(umem->npgs, sizeof(*umem->pgs),
GFP_KERNEL | __GFP_NOWARN);
if (!umem->pgs) if (!umem->pgs)
return -ENOMEM; return -ENOMEM;

4
tools/testing/selftests/bpf/Makefile
View File

@ -16,9 +16,7 @@ LDLIBS += -lcap -lelf -lrt -lpthread
TEST_CUSTOM_PROGS = $(OUTPUT)/urandom_read TEST_CUSTOM_PROGS = $(OUTPUT)/urandom_read
all: $(TEST_CUSTOM_PROGS) all: $(TEST_CUSTOM_PROGS)
$(TEST_CUSTOM_PROGS): urandom_read $(TEST_CUSTOM_PROGS): $(OUTPUT)/%: %.c
urandom_read: urandom_read.c
$(CC) -o $(TEST_CUSTOM_PROGS) -static $< -Wl,--build-id $(CC) -o $(TEST_CUSTOM_PROGS) -static $< -Wl,--build-id
# Order correspond to 'make run_tests' order # Order correspond to 'make run_tests' order