admin/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2025-12-07 20:06:24 +00:00
Code Issues Packages Projects Releases Wiki Activity

convert bpf

Browse Source 
object creation goes through the normal VFS paths or approximation
thereof (user_path_create()/done_path_create() in case of bpf_obj_do_pin(),
open-coded simple_{start,done}_creating() in bpf_iter_link_pin_kernel()
at mount time), removals go entirely through the normal VFS paths (and
->unlink() is simple_unlink() there).

Enough to have bpf_dentry_finalize() use d_make_persistent() instead
of dget() and we are done.

Convert bpf_iter_link_pin_kernel() to simple_{start,done}_creating(),
while we are at it.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2024-05-09 12:26:53 -04:00
parent 1e508e05dd
commit c5055286f8
1 changed files with 5 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
kernel/bpf/inode.c
View File

@@ -144,8 +144,7 @@ static int bpf_inode_type(const struct inode *inode, enum bpf_type *type)
static void bpf_dentry_finalize(struct dentry *dentry, struct inode *inode,
struct inode *dir)
{
d_instantiate(dentry, inode);
dget(dentry);
d_make_persistent(dentry, inode);
inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir));
}
@@ -420,16 +419,12 @@ static int bpf_iter_link_pin_kernel(struct dentry *parent,
struct dentry *dentry;
int ret;
inode_lock(parent->d_inode);
dentry = lookup_noperm(&QSTR(name), parent);
if (IS_ERR(dentry)) {
inode_unlock(parent->d_inode);
dentry = simple_start_creating(parent, name);
if (IS_ERR(dentry))
return PTR_ERR(dentry);
}
ret = bpf_mkobj_ops(dentry, mode, link, &bpf_link_iops,
&bpf_iter_fops);
dput(dentry);
inode_unlock(parent->d_inode);
simple_done_creating(dentry);
return ret;
}
@@ -1080,7 +1075,7 @@ static void bpf_kill_super(struct super_block *sb)
{
struct bpf_mount_opts *opts = sb->s_fs_info;
kill_litter_super(sb);
kill_anon_super(sb);
kfree(opts);
}