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bcachefs: copy_(to|from)_user_errcode()

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we've got some helpers that return errors sanely, move them to a more
common location for use in fs-ioctl.c

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2024-03-02 15:30:33 -05:00
parent ba81523eaa
commit d64547999c
2 changed files with 16 additions and 6 deletions
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6
fs/bcachefs/chardev.c
View File

@ -22,12 +22,6 @@
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/uaccess.h> #include <linux/uaccess.h>
__must_check
static int copy_to_user_errcode(void __user *to, const void *from, unsigned long n)
{
return copy_to_user(to, from, n) ? -EFAULT : 0;
}
/* returns with ref on ca->ref */ /* returns with ref on ca->ref */
static struct bch_dev *bch2_device_lookup(struct bch_fs *c, u64 dev, static struct bch_dev *bch2_device_lookup(struct bch_fs *c, u64 dev,
unsigned flags) unsigned flags)

16
fs/bcachefs/util.h
View File

@ -848,4 +848,20 @@ static inline bool qstr_eq(const struct qstr l, const struct qstr r)
void bch2_darray_str_exit(darray_str *); void bch2_darray_str_exit(darray_str *);
int bch2_split_devs(const char *, darray_str *); int bch2_split_devs(const char *, darray_str *);
#ifdef __KERNEL__
__must_check
static inline int copy_to_user_errcode(void __user *to, const void *from, unsigned long n)
{
return copy_to_user(to, from, n) ? -EFAULT : 0;
}
__must_check
static inline int copy_from_user_errcode(void *to, const void __user *from, unsigned long n)
{
return copy_from_user(to, from, n) ? -EFAULT : 0;
}
#endif
#endif /* _BCACHEFS_UTIL_H */ #endif /* _BCACHEFS_UTIL_H */