Function report |
Source Code:fs\fcntl.c |
Create Date:2022-07-28 20:05:49 |
Last Modify:2020-03-12 14:18:49 | Copyright©Brick |
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Name:fcntl_rw_hint
Proto:static long fcntl_rw_hint(struct file *file, unsigned int cmd, unsigned long arg)
Type:long
Parameter:
Type | Parameter | Name |
---|---|---|
struct file * | file | |
unsigned int | cmd | |
unsigned long | arg |
279 | inode = file_inode(file) |
285 | Case cmd == F_GET_FILE_RW_HINT |
286 | h = file_write_hint(file) |
287 | If copy_to_user(argp, & h, size of argp ) Then Return -EFAULT |
289 | Return 0 |
290 | Case cmd == F_SET_FILE_RW_HINT |
291 | If copy_from_user( & h, argp, size of h ) Then Return -EFAULT |
294 | If Not rw_hint_valid(hint) Then Return -EINVAL |
298 | f_write_hint = hint |
300 | Return 0 |
306 | Case cmd == F_SET_RW_HINT |
307 | If copy_from_user( & h, argp, size of h ) Then Return -EFAULT |
310 | If Not rw_hint_valid(hint) Then Return -EINVAL |
313 | inode_lock(inode) |
314 | i_write_hint = hint |
315 | inode_unlock(inode) |
316 | Return 0 |
317 | Default |
318 | Return -EINVAL |
Name | Describe |
---|---|
do_fcntl |
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