mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 19:00:25 +00:00
![Eric W. Biederman](/assets/img/avatar_default.png)
Remove the slight chance that uids and gids in coda messages will be interpreted in the wrong user namespace. - Only allow processes in the initial user namespace to open the coda character device to communicate with coda filesystems. - Explicitly convert the uids in the coda header into the initial user namespace. - In coda_vattr_to_attr make kuids and kgids from the initial user namespace uids and gids in struct coda_vattr that just came from userspace. - In coda_iattr_to_vattr convert kuids and kgids into uids and gids in the intial user namespace and store them in struct coda_vattr for sending to coda userspace programs. Nothing needs to be changed with mounts as coda does not support being mounted in anything other than the initial user namespace. Cc: Jan Harkes <jaharkes@cs.cmu.edu> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
72 lines
2.6 KiB
C
72 lines
2.6 KiB
C
#ifndef __CODA_PSDEV_H
|
|
#define __CODA_PSDEV_H
|
|
|
|
#include <linux/backing-dev.h>
|
|
#include <linux/mutex.h>
|
|
#include <uapi/linux/coda_psdev.h>
|
|
|
|
struct kstatfs;
|
|
|
|
/* communication pending/processing queues */
|
|
struct venus_comm {
|
|
u_long vc_seq;
|
|
wait_queue_head_t vc_waitq; /* Venus wait queue */
|
|
struct list_head vc_pending;
|
|
struct list_head vc_processing;
|
|
int vc_inuse;
|
|
struct super_block *vc_sb;
|
|
struct backing_dev_info bdi;
|
|
struct mutex vc_mutex;
|
|
};
|
|
|
|
|
|
static inline struct venus_comm *coda_vcp(struct super_block *sb)
|
|
{
|
|
return (struct venus_comm *)((sb)->s_fs_info);
|
|
}
|
|
|
|
/* upcalls */
|
|
int venus_rootfid(struct super_block *sb, struct CodaFid *fidp);
|
|
int venus_getattr(struct super_block *sb, struct CodaFid *fid,
|
|
struct coda_vattr *attr);
|
|
int venus_setattr(struct super_block *, struct CodaFid *, struct coda_vattr *);
|
|
int venus_lookup(struct super_block *sb, struct CodaFid *fid,
|
|
const char *name, int length, int *type,
|
|
struct CodaFid *resfid);
|
|
int venus_close(struct super_block *sb, struct CodaFid *fid, int flags,
|
|
kuid_t uid);
|
|
int venus_open(struct super_block *sb, struct CodaFid *fid, int flags,
|
|
struct file **f);
|
|
int venus_mkdir(struct super_block *sb, struct CodaFid *dirfid,
|
|
const char *name, int length,
|
|
struct CodaFid *newfid, struct coda_vattr *attrs);
|
|
int venus_create(struct super_block *sb, struct CodaFid *dirfid,
|
|
const char *name, int length, int excl, int mode,
|
|
struct CodaFid *newfid, struct coda_vattr *attrs) ;
|
|
int venus_rmdir(struct super_block *sb, struct CodaFid *dirfid,
|
|
const char *name, int length);
|
|
int venus_remove(struct super_block *sb, struct CodaFid *dirfid,
|
|
const char *name, int length);
|
|
int venus_readlink(struct super_block *sb, struct CodaFid *fid,
|
|
char *buffer, int *length);
|
|
int venus_rename(struct super_block *, struct CodaFid *new_fid,
|
|
struct CodaFid *old_fid, size_t old_length,
|
|
size_t new_length, const char *old_name,
|
|
const char *new_name);
|
|
int venus_link(struct super_block *sb, struct CodaFid *fid,
|
|
struct CodaFid *dirfid, const char *name, int len );
|
|
int venus_symlink(struct super_block *sb, struct CodaFid *fid,
|
|
const char *name, int len, const char *symname, int symlen);
|
|
int venus_access(struct super_block *sb, struct CodaFid *fid, int mask);
|
|
int venus_pioctl(struct super_block *sb, struct CodaFid *fid,
|
|
unsigned int cmd, struct PioctlData *data);
|
|
int coda_downcall(struct venus_comm *vcp, int opcode, union outputArgs *out);
|
|
int venus_fsync(struct super_block *sb, struct CodaFid *fid);
|
|
int venus_statfs(struct dentry *dentry, struct kstatfs *sfs);
|
|
|
|
/*
|
|
* Statistics
|
|
*/
|
|
|
|
extern struct venus_comm coda_comms[];
|
|
#endif
|