diff options
Diffstat (limited to 'sys/compat/linuxkpi/common/include/linux/fs.h')
| -rw-r--r-- | sys/compat/linuxkpi/common/include/linux/fs.h | 45 |
1 files changed, 34 insertions, 11 deletions
diff --git a/sys/compat/linuxkpi/common/include/linux/fs.h b/sys/compat/linuxkpi/common/include/linux/fs.h index a28d5bf97121..f1568ad6282d 100644 --- a/sys/compat/linuxkpi/common/include/linux/fs.h +++ b/sys/compat/linuxkpi/common/include/linux/fs.h @@ -150,6 +150,11 @@ struct file_operations { * an illegal seek error */ off_t (*llseek)(struct linux_file *, off_t, int); +/* + * Not supported in FreeBSD. That's ok, we never call it and it allows some + * drivers like DRM drivers to compile without changes. + */ + void (*show_fdinfo)(struct seq_file *, struct file *); #if 0 /* We do not support these methods. Don't permit them to compile. */ loff_t (*llseek)(struct file *, loff_t, int); @@ -264,12 +269,18 @@ get_file(struct linux_file *f) return (f); } +struct linux_file * linux_get_file_rcu(struct linux_file **f); +struct linux_file * get_file_active(struct linux_file **f); +#if defined(LINUXKPI_VERSION) && LINUXKPI_VERSION < 60700 static inline bool get_file_rcu(struct linux_file *f) { return (refcount_acquire_if_not_zero( f->_file == NULL ? &f->f_count : &f->_file->f_count)); } +#else +#define get_file_rcu(f) linux_get_file_rcu(f) +#endif static inline struct inode * igrab(struct inode *inode) @@ -353,9 +364,8 @@ static inline ssize_t simple_read_from_buffer(void __user *dest, size_t read_size, loff_t *ppos, void *orig, size_t buf_size) { - void *read_pos = ((char *) orig) + *ppos; + void *p, *read_pos = ((char *) orig) + *ppos; size_t buf_remain = buf_size - *ppos; - ssize_t num_read; if (buf_remain < 0 || buf_remain > buf_size) return -EINVAL; @@ -363,18 +373,23 @@ simple_read_from_buffer(void __user *dest, size_t read_size, loff_t *ppos, if (read_size > buf_remain) read_size = buf_remain; - /* copy_to_user returns number of bytes NOT read */ - num_read = read_size - copy_to_user(dest, read_pos, read_size); - if (num_read == 0) - return -EFAULT; - *ppos += num_read; - - return (num_read); + /* + * XXX At time of commit only debugfs consumers could be + * identified. If others will use this function we may + * have to revise this: normally we would call copy_to_user() + * here but lindebugfs will return the result and the + * copyout is done elsewhere for us. + */ + p = memcpy(dest, read_pos, read_size); + if (p != NULL) + *ppos += read_size; + + return (read_size); } MALLOC_DECLARE(M_LSATTR); -#define DEFINE_SIMPLE_ATTRIBUTE(__fops, __get, __set, __fmt) \ +#define __DEFINE_SIMPLE_ATTRIBUTE(__fops, __get, __set, __fmt, __wrfunc)\ static inline int \ __fops ## _open(struct inode *inode, struct file *filp) \ { \ @@ -385,10 +400,15 @@ static const struct file_operations __fops = { \ .open = __fops ## _open, \ .release = simple_attr_release, \ .read = simple_attr_read, \ - .write = simple_attr_write, \ + .write = __wrfunc, \ .llseek = no_llseek \ } +#define DEFINE_SIMPLE_ATTRIBUTE(fops, get, set, fmt) \ + __DEFINE_SIMPLE_ATTRIBUTE(fops, get, set, fmt, simple_attr_write) +#define DEFINE_SIMPLE_ATTRIBUTE_SIGNED(fops, get, set, fmt) \ + __DEFINE_SIMPLE_ATTRIBUTE(fops, get, set, fmt, simple_attr_write_signed) + int simple_attr_open(struct inode *inode, struct file *filp, int (*get)(void *, uint64_t *), int (*set)(void *, uint64_t), const char *fmt); @@ -399,4 +419,7 @@ ssize_t simple_attr_read(struct file *filp, char *buf, size_t read_size, loff_t ssize_t simple_attr_write(struct file *filp, const char *buf, size_t write_size, loff_t *ppos); +ssize_t simple_attr_write_signed(struct file *filp, const char *buf, + size_t write_size, loff_t *ppos); + #endif /* _LINUXKPI_LINUX_FS_H_ */ |