/* SPDX-License-Identifier: GPL-2.0-or-later *//* General netfs cache on cache files internal defs * * Copyright (C) 2021 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) */ #ifdef pr_fmt#undef pr_fmt#endif #define pr_fmt(fmt) "CacheFiles: " fmt #include <linux/fscache-cache.h>#include <linux/cred.h>#include <linux/security.h> #define CACHEFILES_DIO_BLOCK_SIZE 4096 struct cachefiles_cache;struct cachefiles_object; enum cachefiles_content { /* These values are saved on disk */ CACHEFILES_CONTENT_NO_DATA = 0, /* No content stored */ CACHEFILES_CONTENT_SINGLE = 1, /* Content is monolithic, all is present */ CACHEFILES_CONTENT_ALL = 2, /* Content is all present, no map */ CACHEFILES_CONTENT_BACKFS_MAP = 3, /* Content is piecemeal, mapped through backing fs */ CACHEFILES_CONTENT_DIRTY = 4, /* Content is dirty (only seen on disk) */ nr__cachefiles_content}; /* * Cached volume representation. */struct cachefiles_volume { struct cachefiles_cache *cache; struct list_head cache_link; /* Link in cache->volumes */ struct fscache_volume *vcookie; /* The netfs's representation */ struct dentry *dentry; /* The volume dentry */ struct dentry *fanout[256]; /* Fanout subdirs */}; /* * Backing file state. */struct cachefiles_object { struct fscache_cookie *cookie; /* Netfs data storage object cookie */ struct cachefiles_volume *volume; /* Cache volume that holds this object */ struct list_head cache_link; /* Link in cache->*_list */ struct file *file; /* The file representing this object */ char *d_name; /* Backing file name */ int debug_id; spinlock_t lock; refcount_t ref; enum cachefiles_content content_info:8; /* Info about content presence */ unsigned long flags;#define CACHEFILES_OBJECT_USING_TMPFILE 0 /* Have an unlinked tmpfile */}; /* * Cache files cache definition */struct cachefiles_cache { struct fscache_cache *cache; /* Cache cookie */ struct vfsmount *mnt; /* mountpoint holding the cache */ struct dentry *store; /* Directory into which live objects go */ struct dentry *graveyard; /* directory into which dead objects go */ struct file *cachefilesd; /* manager daemon handle */ struct list_head volumes; /* List of volume objects */ struct list_head object_list; /* List of active objects */ spinlock_t object_list_lock; /* Lock for volumes and object_list */ const struct cred *cache_cred; /* security override for accessing cache */ struct mutex daemon_mutex; /* command serialisation mutex */ wait_queue_head_t daemon_pollwq; /* poll waitqueue for daemon */ atomic_t gravecounter; /* graveyard uniquifier */ atomic_t f_released; /* number of objects released lately */ atomic_long_t b_released; /* number of blocks released lately */ atomic_long_t b_writing; /* Number of blocks being written */ unsigned frun_percent; /* when to stop culling (% files) */ unsigned fcull_percent; /* when to start culling (% files) */ unsigned fstop_percent; /* when to stop allocating (% files) */ unsigned brun_percent; /* when to stop culling (% blocks) */ unsigned bcull_percent; /* when to start culling (% blocks) */ unsigned bstop_percent; /* when to stop allocating (% blocks) */ unsigned bsize; /* cache's block size */ unsigned bshift; /* ilog2(bsize) */ uint64_t frun; /* when to stop culling */ uint64_t fcull; /* when to start culling */ uint64_t fstop; /* when to stop allocating */ sector_t brun; /* when to stop culling */ sector_t bcull; /* when to start culling */ sector_t bstop; /* when to stop allocating */ unsigned long flags;#define CACHEFILES_READY 0 /* T if cache prepared */#define CACHEFILES_DEAD 1 /* T if cache dead */#define CACHEFILES_CULLING 2 /* T if cull engaged */#define CACHEFILES_STATE_CHANGED 3 /* T if state changed (poll trigger) */ char *rootdirname; /* name of cache root directory */ char *tag; /* cache binding tag */ u32 secid; /* LSM security id */ bool have_secid; /* whether "secid" was set */}; #include <trace/events/cachefiles.h> static inlinestruct file *cachefiles_cres_file(struct netfs_cache_resources *cres){ return cres->cache_priv2;} static inlinestruct cachefiles_object *cachefiles_cres_object(struct netfs_cache_resources *cres){ return fscache_cres_cookie(cres)->cache_priv;} /* * note change of state for daemon */static inline void cachefiles_state_changed(struct cachefiles_cache *cache){ set_bit(CACHEFILES_STATE_CHANGED, &cache->flags); wake_up_all(&cache->daemon_pollwq);} /* * cache.c */extern int cachefiles_add_cache(struct cachefiles_cache *cache);extern void cachefiles_withdraw_cache(struct cachefiles_cache *cache); enum cachefiles_has_space_for { cachefiles_has_space_check, cachefiles_has_space_for_write, cachefiles_has_space_for_create,};extern int cachefiles_has_space(struct cachefiles_cache *cache, unsigned fnr, unsigned bnr, enum cachefiles_has_space_for reason); /* * daemon.c */extern const struct file_operations cachefiles_daemon_fops; /* * error_inject.c */#ifdef CONFIG_CACHEFILES_ERROR_INJECTIONextern unsigned int cachefiles_error_injection_state;extern int cachefiles_register_error_injection(void);extern void cachefiles_unregister_error_injection(void); #else#define cachefiles_error_injection_state 0 static inline int cachefiles_register_error_injection(void){ return 0;} static inline void cachefiles_unregister_error_injection(void){}#endif static inline int cachefiles_inject_read_error(void){ return cachefiles_error_injection_state & 2 ? -EIO : 0;} static inline int cachefiles_inject_write_error(void){ return cachefiles_error_injection_state & 2 ? -EIO : cachefiles_error_injection_state & 1 ? -ENOSPC : 0;} static inline int cachefiles_inject_remove_error(void){ return cachefiles_error_injection_state & 2 ? -EIO : 0;} /* * interface.c */extern const struct fscache_cache_ops cachefiles_cache_ops;extern void cachefiles_see_object(struct cachefiles_object *object, enum cachefiles_obj_ref_trace why);extern struct cachefiles_object *cachefiles_grab_object(struct cachefiles_object *object, enum cachefiles_obj_ref_trace why);extern void cachefiles_put_object(struct cachefiles_object *object, enum cachefiles_obj_ref_trace why); /* * io.c */extern bool cachefiles_begin_operation(struct netfs_cache_resources *cres, enum fscache_want_state want_state);extern int __cachefiles_prepare_write(struct cachefiles_object *object, struct file *file, loff_t *_start, size_t *_len, size_t upper_len, bool no_space_allocated_yet);extern int __cachefiles_write(struct cachefiles_object *object, struct file *file, loff_t start_pos, struct iov_iter *iter, netfs_io_terminated_t term_func, void *term_func_priv); /* * key.c */extern bool cachefiles_cook_key(struct cachefiles_object *object); /* * main.c */extern struct kmem_cache *cachefiles_object_jar; /* * namei.c */extern void cachefiles_unmark_inode_in_use(struct cachefiles_object *object, struct file *file);extern int cachefiles_bury_object(struct cachefiles_cache *cache, struct cachefiles_object *object, struct dentry *dir, struct dentry *rep, enum fscache_why_object_killed why);extern int cachefiles_delete_object(struct cachefiles_object *object, enum fscache_why_object_killed why);extern bool cachefiles_look_up_object(struct cachefiles_object *object);extern struct dentry *cachefiles_get_directory(struct cachefiles_cache *cache, struct dentry *dir, const char *name, bool *_is_new);extern void cachefiles_put_directory(struct dentry *dir); extern int cachefiles_cull(struct cachefiles_cache *cache, struct dentry *dir, char *filename); extern int cachefiles_check_in_use(struct cachefiles_cache *cache, struct dentry *dir, char *filename);extern struct file *cachefiles_create_tmpfile(struct cachefiles_object *object);extern bool cachefiles_commit_tmpfile(struct cachefiles_cache *cache, struct cachefiles_object *object); /* * security.c */extern int cachefiles_get_security_ID(struct cachefiles_cache *cache);extern int cachefiles_determine_cache_security(struct cachefiles_cache *cache, struct dentry *root, const struct cred **_saved_cred); static inline void cachefiles_begin_secure(struct cachefiles_cache *cache, const struct cred **_saved_cred){ *_saved_cred = override_creds(cache->cache_cred);} static inline void cachefiles_end_secure(struct cachefiles_cache *cache, const struct cred *saved_cred){ revert_creds(saved_cred);} /* * volume.c */void cachefiles_acquire_volume(struct fscache_volume *volume);void cachefiles_free_volume(struct fscache_volume *volume);void cachefiles_withdraw_volume(struct cachefiles_volume *volume); /* * xattr.c */extern int cachefiles_set_object_xattr(struct cachefiles_object *object);extern int cachefiles_check_auxdata(struct cachefiles_object *object, struct file *file);extern int cachefiles_remove_object_xattr(struct cachefiles_cache *cache, struct cachefiles_object *object, struct dentry *dentry);extern void cachefiles_prepare_to_write(struct fscache_cookie *cookie);extern bool cachefiles_set_volume_xattr(struct cachefiles_volume *volume);extern int cachefiles_check_volume_xattr(struct cachefiles_volume *volume); /* * Error handling */#define cachefiles_io_error(___cache, FMT, ...) \do { \ pr_err("I/O Error: " FMT"\n", ##__VA_ARGS__); \ fscache_io_error((___cache)->cache); \ set_bit(CACHEFILES_DEAD, &(___cache)->flags); \} while (0) #define cachefiles_io_error_obj(object, FMT, ...) \do { \ struct cachefiles_cache *___cache; \ \ ___cache = (object)->volume->cache; \ cachefiles_io_error(___cache, FMT " [o=%08x]", ##__VA_ARGS__, \ (object)->debug_id); \} while (0) /* * Debug tracing */extern unsigned cachefiles_debug;#define CACHEFILES_DEBUG_KENTER 1#define CACHEFILES_DEBUG_KLEAVE 2#define CACHEFILES_DEBUG_KDEBUG 4 #define dbgprintk(FMT, ...) \ printk(KERN_DEBUG "[%-6.6s] "FMT"\n", current->comm, ##__VA_ARGS__) #define kenter(FMT, ...) dbgprintk("==> %s("FMT")", __func__, ##__VA_ARGS__)#define kleave(FMT, ...) dbgprintk("<== %s()"FMT"", __func__, ##__VA_ARGS__)#define kdebug(FMT, ...) dbgprintk(FMT, ##__VA_ARGS__) #if defined(__KDEBUG)#define _enter(FMT, ...) kenter(FMT, ##__VA_ARGS__)#define _leave(FMT, ...) kleave(FMT, ##__VA_ARGS__)#define _debug(FMT, ...) kdebug(FMT, ##__VA_ARGS__) #elif defined(CONFIG_CACHEFILES_DEBUG)#define _enter(FMT, ...) \do { \ if (cachefiles_debug & CACHEFILES_DEBUG_KENTER) \ kenter(FMT, ##__VA_ARGS__); \} while (0) #define _leave(FMT, ...) \do { \ if (cachefiles_debug & CACHEFILES_DEBUG_KLEAVE) \ kleave(FMT, ##__VA_ARGS__); \} while (0) #define _debug(FMT, ...) \do { \ if (cachefiles_debug & CACHEFILES_DEBUG_KDEBUG) \ kdebug(FMT, ##__VA_ARGS__); \} while (0) #else#define _enter(FMT, ...) no_printk("==> %s("FMT")", __func__, ##__VA_ARGS__)#define _leave(FMT, ...) no_printk("<== %s()"FMT"", __func__, ##__VA_ARGS__)#define _debug(FMT, ...) no_printk(FMT, ##__VA_ARGS__)#endif #if 1 /* defined(__KDEBUGALL) */ #define ASSERT(X) \do { \ if (unlikely(!(X))) { \ pr_err("\n"); \ pr_err("Assertion failed\n"); \ BUG(); \ } \} while (0) #define ASSERTCMP(X, OP, Y) \do { \ if (unlikely(!((X) OP (Y)))) { \ pr_err("\n"); \ pr_err("Assertion failed\n"); \ pr_err("%lx " #OP " %lx is false\n", \ (unsigned long)(X), (unsigned long)(Y)); \ BUG(); \ } \} while (0) #define ASSERTIF(C, X) \do { \ if (unlikely((C) && !(X))) { \ pr_err("\n"); \ pr_err("Assertion failed\n"); \ BUG(); \ } \} while (0) #define ASSERTIFCMP(C, X, OP, Y) \do { \ if (unlikely((C) && !((X) OP (Y)))) { \ pr_err("\n"); \ pr_err("Assertion failed\n"); \ pr_err("%lx " #OP " %lx is false\n", \ (unsigned long)(X), (unsigned long)(Y)); \ BUG(); \ } \} while (0) #else #define ASSERT(X) do {} while (0)#define ASSERTCMP(X, OP, Y) do {} while (0)#define ASSERTIF(C, X) do {} while (0)#define ASSERTIFCMP(C, X, OP, Y) do {} while (0) #endif
/* SPDX-License-Identifier: GPL-2.0-or-later */
/* General netfs cache on cache files internal defs
*
* Copyright (C) 2021 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*/
#ifdef pr_fmt
#undef pr_fmt
#endif
#define pr_fmt(fmt) "CacheFiles: " fmt
#include <linux/fscache-cache.h>
#include <linux/cred.h>
#include <linux/security.h>
#define CACHEFILES_DIO_BLOCK_SIZE 4096
struct cachefiles_cache;
struct cachefiles_object;
enum cachefiles_content {
/* These values are saved on disk */
CACHEFILES_CONTENT_NO_DATA = 0, /* No content stored */
CACHEFILES_CONTENT_SINGLE = 1, /* Content is monolithic, all is present */
CACHEFILES_CONTENT_ALL = 2, /* Content is all present, no map */
CACHEFILES_CONTENT_BACKFS_MAP = 3, /* Content is piecemeal, mapped through backing fs */
CACHEFILES_CONTENT_DIRTY = 4, /* Content is dirty (only seen on disk) */
nr__cachefiles_content
};
/*
* Cached volume representation.
*/
struct cachefiles_volume {
struct cachefiles_cache *cache;
struct list_head cache_link; /* Link in cache->volumes */
struct fscache_volume *vcookie; /* The netfs's representation */
struct dentry *dentry; /* The volume dentry */
struct dentry *fanout[256]; /* Fanout subdirs */
};
/*
* Backing file state.
*/
struct cachefiles_object {
struct fscache_cookie *cookie; /* Netfs data storage object cookie */
struct cachefiles_volume *volume; /* Cache volume that holds this object */
struct list_head cache_link; /* Link in cache->*_list */
struct file *file; /* The file representing this object */
char *d_name; /* Backing file name */
int debug_id;
spinlock_t lock;
refcount_t ref;
enum cachefiles_content content_info:8; /* Info about content presence */
unsigned long flags;
#define CACHEFILES_OBJECT_USING_TMPFILE 0 /* Have an unlinked tmpfile */
};
/*
* Cache files cache definition
*/
struct cachefiles_cache {
struct fscache_cache *cache; /* Cache cookie */
struct vfsmount *mnt; /* mountpoint holding the cache */
struct dentry *store; /* Directory into which live objects go */
struct dentry *graveyard; /* directory into which dead objects go */
struct file *cachefilesd; /* manager daemon handle */
struct list_head volumes; /* List of volume objects */
struct list_head object_list; /* List of active objects */
spinlock_t object_list_lock; /* Lock for volumes and object_list */
const struct cred *cache_cred; /* security override for accessing cache */
struct mutex daemon_mutex; /* command serialisation mutex */
wait_queue_head_t daemon_pollwq; /* poll waitqueue for daemon */
atomic_t gravecounter; /* graveyard uniquifier */
atomic_t f_released; /* number of objects released lately */
atomic_long_t b_released; /* number of blocks released lately */
atomic_long_t b_writing; /* Number of blocks being written */
unsigned frun_percent; /* when to stop culling (% files) */
unsigned fcull_percent; /* when to start culling (% files) */
unsigned fstop_percent; /* when to stop allocating (% files) */
unsigned brun_percent; /* when to stop culling (% blocks) */
unsigned bcull_percent; /* when to start culling (% blocks) */
unsigned bstop_percent; /* when to stop allocating (% blocks) */
unsigned bsize; /* cache's block size */
unsigned bshift; /* ilog2(bsize) */
uint64_t frun; /* when to stop culling */
uint64_t fcull; /* when to start culling */
uint64_t fstop; /* when to stop allocating */
sector_t brun; /* when to stop culling */
sector_t bcull; /* when to start culling */
sector_t bstop; /* when to stop allocating */
unsigned long flags;
#define CACHEFILES_READY 0 /* T if cache prepared */
#define CACHEFILES_DEAD 1 /* T if cache dead */
#define CACHEFILES_CULLING 2 /* T if cull engaged */
#define CACHEFILES_STATE_CHANGED 3 /* T if state changed (poll trigger) */
char *rootdirname; /* name of cache root directory */
char *tag; /* cache binding tag */
u32 secid; /* LSM security id */
bool have_secid; /* whether "secid" was set */
};
#include <trace/events/cachefiles.h>
static inline
struct file *cachefiles_cres_file(struct netfs_cache_resources *cres)
{
return cres->cache_priv2;
}
static inline
struct cachefiles_object *cachefiles_cres_object(struct netfs_cache_resources *cres)
{
return fscache_cres_cookie(cres)->cache_priv;
}
/*
* note change of state for daemon
*/
static inline void cachefiles_state_changed(struct cachefiles_cache *cache)
{
set_bit(CACHEFILES_STATE_CHANGED, &cache->flags);
wake_up_all(&cache->daemon_pollwq);
}
/*
* cache.c
*/
extern int cachefiles_add_cache(struct cachefiles_cache *cache);
extern void cachefiles_withdraw_cache(struct cachefiles_cache *cache);
enum cachefiles_has_space_for {
cachefiles_has_space_check,
cachefiles_has_space_for_write,
cachefiles_has_space_for_create,
};
extern int cachefiles_has_space(struct cachefiles_cache *cache,
unsigned fnr, unsigned bnr,
enum cachefiles_has_space_for reason);
/*
* daemon.c
*/
extern const struct file_operations cachefiles_daemon_fops;
/*
* error_inject.c
*/
#ifdef CONFIG_CACHEFILES_ERROR_INJECTION
extern unsigned int cachefiles_error_injection_state;
extern int cachefiles_register_error_injection(void);
extern void cachefiles_unregister_error_injection(void);
#else
#define cachefiles_error_injection_state 0
static inline int cachefiles_register_error_injection(void)
{
return 0;
}
static inline void cachefiles_unregister_error_injection(void)
{
}
#endif
static inline int cachefiles_inject_read_error(void)
{
return cachefiles_error_injection_state & 2 ? -EIO : 0;
}
static inline int cachefiles_inject_write_error(void)
{
return cachefiles_error_injection_state & 2 ? -EIO :
cachefiles_error_injection_state & 1 ? -ENOSPC :
0;
}
static inline int cachefiles_inject_remove_error(void)
{
return cachefiles_error_injection_state & 2 ? -EIO : 0;
}
/*
* interface.c
*/
extern const struct fscache_cache_ops cachefiles_cache_ops;
extern void cachefiles_see_object(struct cachefiles_object *object,
enum cachefiles_obj_ref_trace why);
extern struct cachefiles_object *cachefiles_grab_object(struct cachefiles_object *object,
enum cachefiles_obj_ref_trace why);
extern void cachefiles_put_object(struct cachefiles_object *object,
enum cachefiles_obj_ref_trace why);
/*
* io.c
*/
extern bool cachefiles_begin_operation(struct netfs_cache_resources *cres,
enum fscache_want_state want_state);
extern int __cachefiles_prepare_write(struct cachefiles_object *object,
struct file *file,
loff_t *_start, size_t *_len, size_t upper_len,
bool no_space_allocated_yet);
extern int __cachefiles_write(struct cachefiles_object *object,
struct file *file,
loff_t start_pos,
struct iov_iter *iter,
netfs_io_terminated_t term_func,
void *term_func_priv);
/*
* key.c
*/
extern bool cachefiles_cook_key(struct cachefiles_object *object);
/*
* main.c
*/
extern struct kmem_cache *cachefiles_object_jar;
/*
* namei.c
*/
extern void cachefiles_unmark_inode_in_use(struct cachefiles_object *object,
struct file *file);
extern int cachefiles_bury_object(struct cachefiles_cache *cache,
struct cachefiles_object *object,
struct dentry *dir,
struct dentry *rep,
enum fscache_why_object_killed why);
extern int cachefiles_delete_object(struct cachefiles_object *object,
enum fscache_why_object_killed why);
extern bool cachefiles_look_up_object(struct cachefiles_object *object);
extern struct dentry *cachefiles_get_directory(struct cachefiles_cache *cache,
struct dentry *dir,
const char *name,
bool *_is_new);
extern void cachefiles_put_directory(struct dentry *dir);
extern int cachefiles_cull(struct cachefiles_cache *cache, struct dentry *dir,
char *filename);
extern int cachefiles_check_in_use(struct cachefiles_cache *cache,
struct dentry *dir, char *filename);
extern struct file *cachefiles_create_tmpfile(struct cachefiles_object *object);
extern bool cachefiles_commit_tmpfile(struct cachefiles_cache *cache,
struct cachefiles_object *object);
/*
* security.c
*/
extern int cachefiles_get_security_ID(struct cachefiles_cache *cache);
extern int cachefiles_determine_cache_security(struct cachefiles_cache *cache,
struct dentry *root,
const struct cred **_saved_cred);
static inline void cachefiles_begin_secure(struct cachefiles_cache *cache,
const struct cred **_saved_cred)
{
*_saved_cred = override_creds(cache->cache_cred);
}
static inline void cachefiles_end_secure(struct cachefiles_cache *cache,
const struct cred *saved_cred)
{
revert_creds(saved_cred);
}
/*
* volume.c
*/
void cachefiles_acquire_volume(struct fscache_volume *volume);
void cachefiles_free_volume(struct fscache_volume *volume);
void cachefiles_withdraw_volume(struct cachefiles_volume *volume);
/*
* xattr.c
*/
extern int cachefiles_set_object_xattr(struct cachefiles_object *object);
extern int cachefiles_check_auxdata(struct cachefiles_object *object,
struct file *file);
extern int cachefiles_remove_object_xattr(struct cachefiles_cache *cache,
struct cachefiles_object *object,
struct dentry *dentry);
extern void cachefiles_prepare_to_write(struct fscache_cookie *cookie);
extern bool cachefiles_set_volume_xattr(struct cachefiles_volume *volume);
extern int cachefiles_check_volume_xattr(struct cachefiles_volume *volume);
/*
* Error handling
*/
#define cachefiles_io_error(___cache, FMT, ...) \
do { \
pr_err("I/O Error: " FMT"\n", ##__VA_ARGS__); \
fscache_io_error((___cache)->cache); \
set_bit(CACHEFILES_DEAD, &(___cache)->flags); \
} while (0)
#define cachefiles_io_error_obj(object, FMT, ...) \
do { \
struct cachefiles_cache *___cache; \
\
___cache = (object)->volume->cache; \
cachefiles_io_error(___cache, FMT " [o=%08x]", ##__VA_ARGS__, \
(object)->debug_id); \
} while (0)
/*
* Debug tracing
*/
extern unsigned cachefiles_debug;
#define CACHEFILES_DEBUG_KENTER 1
#define CACHEFILES_DEBUG_KLEAVE 2
#define CACHEFILES_DEBUG_KDEBUG 4
#define dbgprintk(FMT, ...) \
printk(KERN_DEBUG "[%-6.6s] "FMT"\n", current->comm, ##__VA_ARGS__)
#define kenter(FMT, ...) dbgprintk("==> %s("FMT")", __func__, ##__VA_ARGS__)
#define kleave(FMT, ...) dbgprintk("<== %s()"FMT"", __func__, ##__VA_ARGS__)
#define kdebug(FMT, ...) dbgprintk(FMT, ##__VA_ARGS__)
#if defined(__KDEBUG)
#define _enter(FMT, ...) kenter(FMT, ##__VA_ARGS__)
#define _leave(FMT, ...) kleave(FMT, ##__VA_ARGS__)
#define _debug(FMT, ...) kdebug(FMT, ##__VA_ARGS__)
#elif defined(CONFIG_CACHEFILES_DEBUG)
#define _enter(FMT, ...) \
do { \
if (cachefiles_debug & CACHEFILES_DEBUG_KENTER) \
kenter(FMT, ##__VA_ARGS__); \
} while (0)
#define _leave(FMT, ...) \
do { \
if (cachefiles_debug & CACHEFILES_DEBUG_KLEAVE) \
kleave(FMT, ##__VA_ARGS__); \
} while (0)
#define _debug(FMT, ...) \
do { \
if (cachefiles_debug & CACHEFILES_DEBUG_KDEBUG) \
kdebug(FMT, ##__VA_ARGS__); \
} while (0)
#else
#define _enter(FMT, ...) no_printk("==> %s("FMT")", __func__, ##__VA_ARGS__)
#define _leave(FMT, ...) no_printk("<== %s()"FMT"", __func__, ##__VA_ARGS__)
#define _debug(FMT, ...) no_printk(FMT, ##__VA_ARGS__)
#endif
#if 1 /* defined(__KDEBUGALL) */
#define ASSERT(X) \
do { \
if (unlikely(!(X))) { \
pr_err("\n"); \
pr_err("Assertion failed\n"); \
BUG(); \
} \
} while (0)
#define ASSERTCMP(X, OP, Y) \
do { \
if (unlikely(!((X) OP (Y)))) { \
pr_err("\n"); \
pr_err("Assertion failed\n"); \
pr_err("%lx " #OP " %lx is false\n", \
(unsigned long)(X), (unsigned long)(Y)); \
BUG(); \
} \
} while (0)
#define ASSERTIF(C, X) \
do { \
if (unlikely((C) && !(X))) { \
pr_err("\n"); \
pr_err("Assertion failed\n"); \
BUG(); \
} \
} while (0)
#define ASSERTIFCMP(C, X, OP, Y) \
do { \
if (unlikely((C) && !((X) OP (Y)))) { \
pr_err("\n"); \
pr_err("Assertion failed\n"); \
pr_err("%lx " #OP " %lx is false\n", \
(unsigned long)(X), (unsigned long)(Y)); \
BUG(); \
} \
} while (0)
#else
#define ASSERT(X) do {} while (0)
#define ASSERTCMP(X, OP, Y) do {} while (0)
#define ASSERTIF(C, X) do {} while (0)
#define ASSERTIFCMP(C, X, OP, Y) do {} while (0)
#endif