cregit-Linux how code gets into the kernel

Release 4.16 fs/mount.h

Directory: fs
/* SPDX-License-Identifier: GPL-2.0 */
#include <linux/mount.h>
#include <linux/seq_file.h>
#include <linux/poll.h>
#include <linux/ns_common.h>
#include <linux/fs_pin.h>


struct mnt_namespace {
	
atomic_t		count;
	
struct ns_common	ns;
	
struct mount *	root;
	
struct list_head	list;
	
struct user_namespace	*user_ns;
	
struct ucounts		*ucounts;
	
u64			seq;	/* Sequence number to prevent loops */
	
wait_queue_head_t poll;
	
u64 event;
	
unsigned int		mounts; /* # of mounts in the namespace */
	
unsigned int		pending_mounts;

} __randomize_layout;


struct mnt_pcp {
	
int mnt_count;
	
int mnt_writers;
};


struct mountpoint {
	
struct hlist_node m_hash;
	
struct dentry *m_dentry;
	
struct hlist_head m_list;
	
int m_count;
};


struct mount {
	
struct hlist_node mnt_hash;
	
struct mount *mnt_parent;
	
struct dentry *mnt_mountpoint;
	
struct vfsmount mnt;
	
union {
		
struct rcu_head mnt_rcu;
		
struct llist_node mnt_llist;
	};
#ifdef CONFIG_SMP
	
struct mnt_pcp __percpu *mnt_pcp;
#else
	
int mnt_count;
	
int mnt_writers;
#endif
	
struct list_head mnt_mounts;	/* list of children, anchored here */
	
struct list_head mnt_child;	/* and going through their mnt_child */
	
struct list_head mnt_instance;	/* mount instance on sb->s_mounts */
	
const char *mnt_devname;	/* Name of device e.g. /dev/dsk/hda1 */
	
struct list_head mnt_list;
	
struct list_head mnt_expire;	/* link in fs-specific expiry list */
	
struct list_head mnt_share;	/* circular list of shared mounts */
	
struct list_head mnt_slave_list;/* list of slave mounts */
	
struct list_head mnt_slave;	/* slave list entry */
	
struct mount *mnt_master;	/* slave is on master->mnt_slave_list */
	
struct mnt_namespace *mnt_ns;	/* containing namespace */
	
struct mountpoint *mnt_mp;	/* where is it mounted */
	
struct hlist_node mnt_mp_list;	/* list mounts with the same mountpoint */
	
struct list_head mnt_umounting; /* list entry for umount propagation */
#ifdef CONFIG_FSNOTIFY
	
struct fsnotify_mark_connector __rcu *mnt_fsnotify_marks;
	
__u32 mnt_fsnotify_mask;
#endif
	
int mnt_id;			/* mount identifier */
	
int mnt_group_id;		/* peer group identifier */
	
int mnt_expiry_mark;		/* true if marked for expiry */
	
struct hlist_head mnt_pins;
	
struct fs_pin mnt_umount;
	
struct dentry *mnt_ex_mountpoint;

} __randomize_layout;


#define MNT_NS_INTERNAL ERR_PTR(-EINVAL) 
/* distinct from any mnt_namespace */


static inline struct mount *real_mount(struct vfsmount *mnt) { return container_of(mnt, struct mount, mnt); }

Contributors

PersonTokensPropCommitsCommitProp
Al Viro25100.00%1100.00%
Total25100.00%1100.00%


static inline int mnt_has_parent(struct mount *mnt) { return mnt != mnt->mnt_parent; }

Contributors

PersonTokensPropCommitsCommitProp
Al Viro19100.00%2100.00%
Total19100.00%2100.00%


static inline int is_mounted(struct vfsmount *mnt) { /* neither detached nor internal? */ return !IS_ERR_OR_NULL(real_mount(mnt)->mnt_ns); }

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Al Viro2392.00%150.00%
Eric W. Biedermann28.00%150.00%
Total25100.00%2100.00%

extern struct mount *__lookup_mnt(struct vfsmount *, struct dentry *); extern int __legitimize_mnt(struct vfsmount *, unsigned); extern bool legitimize_mnt(struct vfsmount *, unsigned);
static inline bool __path_is_mountpoint(const struct path *path) { struct mount *m = __lookup_mnt(path->mnt, path->dentry); return m && likely(!(m->mnt.mnt_flags & MNT_SYNC_UMOUNT)); }

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Ian Kent46100.00%1100.00%
Total46100.00%1100.00%

extern void __detach_mounts(struct dentry *dentry);
static inline void detach_mounts(struct dentry *dentry) { if (!d_mountpoint(dentry)) return; __detach_mounts(dentry); }

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PersonTokensPropCommitsCommitProp
Eric W. Biedermann26100.00%1100.00%
Total26100.00%1100.00%


static inline void get_mnt_ns(struct mnt_namespace *ns) { atomic_inc(&ns->count); }

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PersonTokensPropCommitsCommitProp
Al Viro20100.00%1100.00%
Total20100.00%1100.00%

extern seqlock_t mount_lock;
static inline void lock_mount_hash(void) { write_seqlock(&mount_lock); }

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PersonTokensPropCommitsCommitProp
Al Viro15100.00%2100.00%
Total15100.00%2100.00%


static inline void unlock_mount_hash(void) { write_sequnlock(&mount_lock); }

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PersonTokensPropCommitsCommitProp
Al Viro15100.00%2100.00%
Total15100.00%2100.00%

struct proc_mounts { struct mnt_namespace *ns; struct path root; int (*show)(struct seq_file *, struct vfsmount *); void *cached_mount; u64 cached_event; loff_t cached_index; }; extern const struct seq_operations mounts_op; extern bool __is_local_mountpoint(struct dentry *dentry);
static inline bool is_local_mountpoint(struct dentry *dentry) { if (!d_mountpoint(dentry)) return false; return __is_local_mountpoint(dentry); }

Contributors

PersonTokensPropCommitsCommitProp
Eric W. Biedermann29100.00%1100.00%
Total29100.00%1100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Al Viro42571.19%3567.31%
Eric W. Biedermann11519.26%1121.15%
Ian Kent467.71%11.92%
Miklos Szeredi50.84%11.92%
Jan Kara30.50%23.85%
Kees Cook20.34%11.92%
Greg Kroah-Hartman10.17%11.92%
Total597100.00%52100.00%
Directory: fs
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