#ifndef __SOUND_HWDEP_H #define __SOUND_HWDEP_H /* * Hardware dependent layer * Copyright (c) by Jaroslav Kysela * * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #include #include struct snd_hwdep; /* hwdep file ops; all ops can be NULL */ struct snd_hwdep_ops { long long (*llseek)(struct snd_hwdep *hw, struct file *file, long long offset, int orig); long (*read)(struct snd_hwdep *hw, char __user *buf, long count, loff_t *offset); long (*write)(struct snd_hwdep *hw, const char __user *buf, long count, loff_t *offset); int (*open)(struct snd_hwdep *hw, struct file * file); int (*release)(struct snd_hwdep *hw, struct file * file); unsigned int (*poll)(struct snd_hwdep *hw, struct file *file, poll_table *wait); int (*ioctl)(struct snd_hwdep *hw, struct file *file, unsigned int cmd, unsigned long arg); int (*ioctl_compat)(struct snd_hwdep *hw, struct file *file, unsigned int cmd, unsigned long arg); int (*mmap)(struct snd_hwdep *hw, struct file *file, struct vm_area_struct *vma); int (*dsp_status)(struct snd_hwdep *hw, struct snd_hwdep_dsp_status *status); int (*dsp_load)(struct snd_hwdep *hw, struct snd_hwdep_dsp_image *image); }; struct snd_hwdep { struct snd_card *card; struct list_head list; int device; char id[32]; char name[80]; int iface; #ifdef CONFIG_SND_OSSEMUL int oss_type; int ossreg; #endif struct snd_hwdep_ops ops; wait_queue_head_t open_wait; void *private_data; void (*private_free) (struct snd_hwdep *hwdep); struct device dev; struct mutex open_mutex; int used; /* reference counter */ unsigned int dsp_loaded; /* bit fields of loaded dsp indices */ unsigned int exclusive:1; /* exclusive access mode */ }; extern int snd_hwdep_new(struct snd_card *card, char *id, int device, struct snd_hwdep **rhwdep); #endif /* __SOUND_HWDEP_H */ lass='txt' type='search' size='10' name='q' value=''/>
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authorEric W. Biederman <ebiederm@xmission.com>2017-01-04 17:37:27 +1300
committerEric W. Biederman <ebiederm@xmission.com>2017-01-10 13:34:55 +1300
commit75422726b0f717d67db3283c2eb5bc14fa2619c5 (patch)
tree166111b615cc1e00e809eff6186146e09785c524
parent3895dbf8985f656675b5bde610723a29cbce3fa7 (diff)
libfs: Modify mount_pseudo_xattr to be clear it is not a userspace mount
Add MS_KERNMOUNT to the flags that are passed. Use sget_userns and force &init_user_ns instead of calling sget so that even if called from a weird context the internal filesystem will be considered to be in the intial user namespace. Luis Ressel reported that the the failure to pass MS_KERNMOUNT into mount_pseudo broke his in development graphics driver that uses the generic drm infrastructure. I am not certain the deriver was bug free in it's usage of that infrastructure but since mount_pseudo_xattr can never be triggered by userspace it is clearer and less error prone, and less problematic for the code to be explicit. Reported-by: Luis Ressel <aranea@aixah.de> Tested-by: Luis Ressel <aranea@aixah.de> Acked-by: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
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