mirror of
https://github.com/ish-app/ish.git
synced 2026-01-25 14:06:40 +00:00
5c3ff5178d
try_cleanup_inode is called with both mount->lock and inodes_lock, but they aren't always acquired in the same order (inode_release and fakefs_unlink do it differently). Fix this by getting rid of try_cleanup_inode, replacing it with direct calls to fakefs_inode_orphaned which always locks mount->lock second.
79 lines
1.9 KiB
C
79 lines
1.9 KiB
C
#ifndef FS_INODE_H
|
|
#define FS_INODE_H
|
|
#include <sys/types.h>
|
|
#include "misc.h"
|
|
#include "util/list.h"
|
|
#include "util/sync.h"
|
|
struct mount;
|
|
struct fd;
|
|
|
|
struct inode_data {
|
|
unsigned refcount;
|
|
ino_t number;
|
|
struct mount *mount;
|
|
struct list chain;
|
|
|
|
struct list posix_locks;
|
|
cond_t posix_unlock;
|
|
|
|
uint32_t socket_id;
|
|
|
|
lock_t lock;
|
|
};
|
|
|
|
struct inode_data *inode_get(struct mount *mount, ino_t inode);
|
|
void inode_retain(struct inode_data *inode);
|
|
void inode_release(struct inode_data *inode);
|
|
|
|
// generic_open must lock out anything trying to destroy an inode between
|
|
// opening the file and acquiring a reference to its inode. For this purpose
|
|
// only, the inodes_lock and inode_get_unlocked are made available. Think
|
|
// carefully before using them for anything else.
|
|
// mount->lock nests inside this.
|
|
// To quote @dril: i despise this lock. id love nothing more than to kick it
|
|
// through the wall and shatter it into 100 deadlocks. But i need it
|
|
extern lock_t inodes_lock;
|
|
struct inode_data *inode_get_unlocked(struct mount *mount, ino_t inode);
|
|
|
|
// calls mount->fs->inode_orphaned if this inode is orphaned, while holding indoes_lock
|
|
void inode_check_orphaned(struct mount *mount, ino_t ino);
|
|
|
|
// file locking stuff (maybe should go in kernel/calls.h?)
|
|
|
|
#define F_RDLCK_ 0
|
|
#define F_WRLCK_ 1
|
|
#define F_UNLCK_ 2
|
|
|
|
struct file_lock {
|
|
off_t_ start;
|
|
off_t_ end;
|
|
int type;
|
|
pid_t_ pid;
|
|
void *owner;
|
|
struct list locks;
|
|
};
|
|
|
|
struct flock_ {
|
|
word_t type;
|
|
word_t whence;
|
|
off_t_ start;
|
|
off_t_ len;
|
|
pid_t_ pid;
|
|
} __attribute__((packed));
|
|
struct flock32_ {
|
|
word_t type;
|
|
word_t whence;
|
|
dword_t start;
|
|
dword_t len;
|
|
pid_t_ pid;
|
|
} __attribute__((packed));
|
|
|
|
int fcntl_getlk(struct fd *fd, struct flock_ *flock);
|
|
// cmd should be either F_SETLK or F_SETLKW
|
|
int fcntl_setlk(struct fd *fd, struct flock_ *flock, bool block);
|
|
|
|
// locks the inode internally
|
|
void file_lock_remove_owned_by(struct fd *fd, void *owner);
|
|
|
|
#endif
|