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| author | Alexei Starovoitov <ast@kernel.org> | 2024-03-06 19:12:25 -0800 |
|---|---|---|
| committer | Martin KaFai Lau <martin.lau@kernel.org> | 2024-03-07 14:58:48 -0800 |
| commit | cf2c2e4a3d910270903d50462aaa75140cdb2c96 (patch) | |
| tree | af6f493a310ee8317f38abc0ec963a5fc33637af /kernel/bpf | |
| parent | 8d94f1357c00d7706c1f3d0bb568e054cef6aea1 (diff) | |
| download | linux-cf2c2e4a3d910270903d50462aaa75140cdb2c96.tar.gz linux-cf2c2e4a3d910270903d50462aaa75140cdb2c96.tar.bz2 linux-cf2c2e4a3d910270903d50462aaa75140cdb2c96.zip | |
bpf: Plumb get_unmapped_area() callback into bpf_map_ops
Subsequent patches introduce bpf_arena that imposes special alignment
requirements on address selection.
Acked-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/r/20240307031228.42896-4-alexei.starovoitov@gmail.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Diffstat (limited to 'kernel/bpf')
| -rw-r--r-- | kernel/bpf/syscall.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index b2750b79ac80..f63f4da4db5e 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -937,6 +937,21 @@ static __poll_t bpf_map_poll(struct file *filp, struct poll_table_struct *pts) return EPOLLERR; } +static unsigned long bpf_get_unmapped_area(struct file *filp, unsigned long addr, + unsigned long len, unsigned long pgoff, + unsigned long flags) +{ + struct bpf_map *map = filp->private_data; + + if (map->ops->map_get_unmapped_area) + return map->ops->map_get_unmapped_area(filp, addr, len, pgoff, flags); +#ifdef CONFIG_MMU + return current->mm->get_unmapped_area(filp, addr, len, pgoff, flags); +#else + return addr; +#endif +} + const struct file_operations bpf_map_fops = { #ifdef CONFIG_PROC_FS .show_fdinfo = bpf_map_show_fdinfo, @@ -946,6 +961,7 @@ const struct file_operations bpf_map_fops = { .write = bpf_dummy_write, .mmap = bpf_map_mmap, .poll = bpf_map_poll, + .get_unmapped_area = bpf_get_unmapped_area, }; int bpf_map_new_fd(struct bpf_map *map, int flags) |