Function report |
Source Code:fs\ioctl.c |
Create Date:2022-07-28 20:06:21 |
Last Modify:2020-03-12 14:18:49 | Copyright©Brick |
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Name:This provides compatibility with legacy XFS pre-allocation ioctls* which predate the fallocate syscall.* Only the l_start, l_len and l_whence fields of the 'struct space_resv'* are used here, rest are ignored.
Proto:int ioctl_preallocate(struct file *filp, int mode, void __user *argp)
Type:int
Parameter:
Type | Parameter | Name |
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struct file * | filp | |
int | mode | |
void __user * | argp |
472 | inode = file_inode(filp) |
475 | If copy_from_user( & sr, argp, size of sr ) Then Return -EFAULT |
479 | Case l_whence == seek relative to beginning of file |
480 | Break |
481 | Case l_whence == seek relative to current file position |
484 | Case l_whence == seek relative to end of file |
486 | Break |
487 | Default |
488 | Return -EINVAL |
491 | Return vfs_fallocate(filp, mode | default is extend size , l_start, len == 0 means until end of file ) |
Name | Describe |
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file_ioctl |
Source code conversion tool public plug-in interface | X |
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Support c/c++/esqlc/java Oracle/Informix/Mysql Plug-in can realize: logical Report Code generation and batch code conversion |