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bpf: switch to fdget_raw()

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Reviewed-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2022-08-03 20:13:33 -04:00
parent 96e85e95dc
commit 1d0027dc9a
1 changed files with 15 additions and 23 deletions
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38
kernel/bpf/bpf_inode_storage.c
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@ -84,16 +84,13 @@ void bpf_inode_storage_free(struct inode *inode)
static void *bpf_fd_inode_storage_lookup_elem(struct bpf_map *map, void *key)
{
struct bpf_local_storage_data *sdata;
struct file *f;
int fd;
struct fd f = fdget_raw(*(int *)key);
fd = *(int *)key;
f = fget_raw(fd);
if (!f)
if (!f.file)
return ERR_PTR(-EBADF);
sdata = inode_storage_lookup(f->f_inode, map, true);
fput(f);
sdata = inode_storage_lookup(file_inode(f.file), map, true);
fdput(f);
return sdata ? sdata->data : NULL;
}
@ -101,22 +98,19 @@ static int bpf_fd_inode_storage_update_elem(struct bpf_map *map, void *key,
void *value, u64 map_flags)
{
struct bpf_local_storage_data *sdata;
struct file *f;
int fd;
struct fd f = fdget_raw(*(int *)key);
fd = *(int *)key;
f = fget_raw(fd);
if (!f)
if (!f.file)
return -EBADF;
if (!inode_storage_ptr(f->f_inode)) {
fput(f);
if (!inode_storage_ptr(file_inode(f.file))) {
fdput(f);
return -EBADF;
}
sdata = bpf_local_storage_update(f->f_inode,
sdata = bpf_local_storage_update(file_inode(f.file),
(struct bpf_local_storage_map *)map,
value, map_flags, GFP_ATOMIC);
fput(f);
fdput(f);
return PTR_ERR_OR_ZERO(sdata);
}
@ -135,16 +129,14 @@ static int inode_storage_delete(struct inode *inode, struct bpf_map *map)
static int bpf_fd_inode_storage_delete_elem(struct bpf_map *map, void *key)
{
struct file *f;
int fd, err;
struct fd f = fdget_raw(*(int *)key);
int err;
fd = *(int *)key;
f = fget_raw(fd);
if (!f)
if (!f.file)
return -EBADF;
err = inode_storage_delete(f->f_inode, map);
fput(f);
err = inode_storage_delete(file_inode(f.file), map);
fdput(f);
return err;
}