Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
pidfs: remove custom inode allocation
We don't need it anymore as persistent information is allocated lazily
and stashed in struct pid.
Link: https://lore.kernel.org/20250618-work-pidfs-persistent-v2-7-98f3456fd552@kernel.org
Reviewed-by: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@canonical.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
-39
-39
fs/pidfs.c
-39
fs/pidfs.c
···
27
27
28
28
#define PIDFS_PID_DEAD ERR_PTR(-ESRCH)
29
29
30
-
static struct kmem_cache *pidfs_cachep __ro_after_init;
31
30
static struct kmem_cache *pidfs_attr_cachep __ro_after_init;
32
31
33
32
/*
···
43
44
struct pidfs_exit_info __pei;
44
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struct pidfs_exit_info *exit_info;
45
46
};
46
-
47
-
struct pidfs_inode {
48
-
struct inode vfs_inode;
49
-
};
50
-
51
-
static inline struct pidfs_inode *pidfs_i(struct inode *inode)
52
-
{
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-
return container_of(inode, struct pidfs_inode, vfs_inode);
54
-
}
55
47
56
48
static struct rb_root pidfs_ino_tree = RB_ROOT;
57
49
···
676
686
put_pid(pid);
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687
}
678
688
679
-
static struct inode *pidfs_alloc_inode(struct super_block *sb)
680
-
{
681
-
struct pidfs_inode *pi;
682
-
683
-
pi = alloc_inode_sb(sb, pidfs_cachep, GFP_KERNEL);
684
-
if (!pi)
685
-
return NULL;
686
-
687
-
return &pi->vfs_inode;
688
-
}
689
-
690
-
static void pidfs_free_inode(struct inode *inode)
691
-
{
692
-
kfree(pidfs_i(inode));
693
-
}
694
-
695
689
static const struct super_operations pidfs_sops = {
696
-
.alloc_inode = pidfs_alloc_inode,
697
690
.drop_inode = generic_delete_inode,
698
691
.evict_inode = pidfs_evict_inode,
699
-
.free_inode = pidfs_free_inode,
700
692
.statfs = simple_statfs,
701
693
};
702
694
···
1039
1067
dput(pid->stashed);
1040
1068
}
1041
1069
1042
-
static void pidfs_inode_init_once(void *data)
1043
-
{
1044
-
struct pidfs_inode *pi = data;
1045
-
1046
-
inode_init_once(&pi->vfs_inode);
1047
-
}
1048
-
1049
1070
void __init pidfs_init(void)
1050
1071
{
1051
-
pidfs_cachep = kmem_cache_create("pidfs_cache", sizeof(struct pidfs_inode), 0,
1052
-
(SLAB_HWCACHE_ALIGN | SLAB_RECLAIM_ACCOUNT |
1053
-
SLAB_ACCOUNT | SLAB_PANIC),
1054
-
pidfs_inode_init_once);
1055
1072
pidfs_attr_cachep = kmem_cache_create("pidfs_attr_cache", sizeof(struct pidfs_attr), 0,
1056
1073
(SLAB_HWCACHE_ALIGN | SLAB_RECLAIM_ACCOUNT |
1057
1074
SLAB_ACCOUNT | SLAB_PANIC), NULL);