Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:security\smack\smackfs.c Create Date:2022-07-28 19:28:22
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Name:smk_read_ambient - read() for /smack/ambient*@filp: file pointer, not actually used*@buf: where to put the result*@cn: maximum to send along*@ppos: where to start* Returns number of bytes read or error code, as appropriate

Proto:static ssize_t smk_read_ambient(struct file *filp, char __user *buf, size_t cn, loff_t *ppos)

Type:ssize_t

Parameter:

TypeParameterName
struct file *filp
char __user *buf
size_tcn
loff_t *ppos
1777  If ppos != 0 Then Return 0
1783  mutex_lock( & smack_ambient_lock)
1785  asize = strlen - Find the length of a string*@s: The string to be sized + 1
1787  If cn >= asize Then rc = simple_read_from_buffer(buf, cn, ppos, smk_known, asize)
1791  Else rc = -EINVAL
1794  mutex_unlock - release the mutex*@lock: the mutex to be released* Unlock a mutex that has been locked by this task previously.* This function must not be used in interrupt context. Unlocking* of a not locked mutex is not allowed.
1796  Return rc