1 /* { dg-do compile } */
2 /* { dg-require-effective-target arm_hard_vfp_ok } */
3 /* { dg-options "-O2 -mapcs -march=armv7-a -mfloat-abi=hard -mfpu=vfpv3-d16" } */
4
5 int inode_permission (), try_break_deleg ();
6 int mutex_lock (), mutex_unlock ();
7 struct mutex
8 {
9 };
10 struct dentry
11 {
12 struct inode *d_inode;
13 };
14 struct inode
15 {
16 const struct inode_operations *i_op;
17 struct super_block *i_sb;
18 union
19 {
20 const unsigned int i_nlink;
21 };
22 unsigned long i_state;
23 struct mutex i_mutex;
24 };
25 struct super_block
26 {
27 unsigned int s_max_links;
28 };
29 struct inode_operations
30 {
31 int (*link) (struct dentry *, struct inode *, struct dentry *);
32 } __attribute__ ((__aligned__ ((1 << 6))));
33 static inline __attribute__ ((always_inline))
34 __attribute__ ((no_instrument_function))
may_create(struct inode * dir,struct dentry * child)35 int may_create (struct inode *dir, struct dentry *child)
36 {
37 if (child->d_inode)
38 return -17;
39 return inode_permission (dir, 0x00000002 | 0x00000001);
40 }
41
42 int
vfs_link(struct dentry * old_dentry,struct inode * dir,struct dentry * new_dentry,struct inode ** delegated_inode)43 vfs_link (struct dentry *old_dentry, struct inode *dir,
44 struct dentry *new_dentry, struct inode **delegated_inode)
45 {
46 struct inode *inode = old_dentry->d_inode;
47 unsigned max_links = dir->i_sb->s_max_links;
48 int error;
49 error = may_create (dir, new_dentry);
50 if (error)
51 return error;
52 mutex_lock (&inode->i_mutex);
53 if (inode->i_nlink == 0 && !(inode->i_state & (1 << 10)))
54 error = -2;
55 else if (max_links && inode->i_nlink >= max_links)
56 error = -31;
57 else
58 {
59 error = try_break_deleg (inode, delegated_inode);
60 error = dir->i_op->link (old_dentry, dir, new_dentry);
61 }
62 mutex_unlock (&inode->i_mutex);
63 return error;
64 }
65