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Commit 57a7fa4a authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Christoph Hellwig
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[PATCH] make devfs_alloc_unique_number private to devfs 

.. by moving a bunch of devfs-related code from fs/partition/check.c
to fs/devfs/base.c.  Also has the nice sideffect of getting rid of
a bunch of ugly ifdefs.

[This is the new and improved, rediffed, applying and compilable
 version.  In short it's perfect]
parent cc4b0bcd
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Inline Side-by-side
Showing with 104 additions and 119 deletions
fs/devfs/util.c
View file @ 57a7fa4a
......@@ -70,6 +70,7 @@
#include <linux/devfs_fs_kernel.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/genhd.h>
#include <asm/bitops.h>
#include "internal.h"
......@@ -266,6 +267,18 @@ void devfs_dealloc_devnum(umode_t mode, dev_t devnum)
up(&device_list_mutex);
}
struct unique_numspace
{
spinlock_t init_lock;
unsigned char sem_initialised;
unsigned int num_free; /* Num free in bits */
unsigned int length; /* Array length in bytes */
unsigned long *bits;
struct semaphore semaphore;
};
#define UNIQUE_NUMBERSPACE_INITIALISER {SPIN_LOCK_UNLOCKED, 0, 0, 0, NULL}
/**
* devfs_alloc_unique_number - Allocate a unique (positive) number.
......@@ -339,3 +352,82 @@ void devfs_dealloc_unique_number (struct unique_numspace *space, int number)
if (!was_set) PRINTK ("(): number %d was already free\n", number);
} /* End Function devfs_dealloc_unique_number */
EXPORT_SYMBOL(devfs_dealloc_unique_number);
static struct unique_numspace disc_numspace = UNIQUE_NUMBERSPACE_INITIALISER;
static struct unique_numspace cdrom_numspace = UNIQUE_NUMBERSPACE_INITIALISER;
void devfs_create_partitions(struct gendisk *dev)
{
int pos = 0;
devfs_handle_t dir;
char dirname[64], symlink[16];
if (dev->flags & GENHD_FL_DEVFS) {
dir = dev->de;
if (!dir) /* Aware driver wants to block disc management */
return;
pos = devfs_generate_path(dir, dirname + 3, sizeof dirname-3);
if (pos < 0)
return;
strncpy(dirname + pos, "../", 3);
} else {
/* Unaware driver: construct "real" directory */
sprintf(dirname, "../%s/disc%d", dev->disk_name,
dev->first_minor >> dev->minor_shift);
dir = devfs_mk_dir(dirname + 3);
dev->de = dir;
}
dev->number = devfs_alloc_unique_number (&disc_numspace);
sprintf(symlink, "discs/disc%d", dev->number);
devfs_mk_symlink(symlink, dirname + pos);
dev->disk_de = devfs_register(dir, "disc", 0,
dev->major, dev->first_minor,
S_IFBLK | S_IRUSR | S_IWUSR, dev->fops, NULL);
}
void devfs_create_cdrom(struct gendisk *dev)
{
char vname[23];
dev->number = devfs_alloc_unique_number(&cdrom_numspace);
sprintf(vname, "cdroms/cdrom%d", dev->number);
if (dev->de) {
int pos;
char rname[64];
dev->disk_de = devfs_register(dev->de, "cd", DEVFS_FL_DEFAULT,
dev->major, dev->first_minor,
S_IFBLK | S_IRUGO | S_IWUGO,
dev->fops, NULL);
pos = devfs_generate_path(dev->disk_de, rname+3, sizeof(rname)-3);
if (pos >= 0) {
strncpy(rname + pos, "../", 3);
devfs_mk_symlink(vname, rname + pos);
}
} else {
dev->disk_de = devfs_register (NULL, vname, DEVFS_FL_DEFAULT,
dev->major, dev->first_minor,
S_IFBLK | S_IRUGO | S_IWUGO,
dev->fops, NULL);
}
}
void devfs_remove_partitions(struct gendisk *dev)
{
devfs_unregister(dev->disk_de);
dev->disk_de = NULL;
if (dev->flags & GENHD_FL_CD) {
if (dev->de)
devfs_remove("cdroms/cdrom%d", dev->number);
devfs_dealloc_unique_number(&cdrom_numspace, dev->number);
} else {
devfs_remove("discs/disc%d", dev->number);
if (!(dev->flags & GENHD_FL_DEVFS)) {
devfs_unregister(dev->de);
dev->de = NULL;
}
devfs_dealloc_unique_number(&disc_numspace, dev->number);
}
}
fs/partitions/check.c
View file @ 57a7fa4a
......@@ -176,93 +176,6 @@ static void devfs_register_partition(struct gendisk *dev, int part)
#endif
}
#ifdef CONFIG_DEVFS_FS
static struct unique_numspace disc_numspace = UNIQUE_NUMBERSPACE_INITIALISER;
static struct unique_numspace cdrom_numspace = UNIQUE_NUMBERSPACE_INITIALISER;
#endif
static void devfs_create_partitions(struct gendisk *dev)
{
#ifdef CONFIG_DEVFS_FS
int pos = 0;
devfs_handle_t dir;
char dirname[64], symlink[16];
if (dev->flags & GENHD_FL_DEVFS) {
dir = dev->de;
if (!dir) /* Aware driver wants to block disc management */
return;
pos = devfs_generate_path(dir, dirname + 3, sizeof dirname-3);
if (pos < 0)
return;
strncpy(dirname + pos, "../", 3);
} else {
/* Unaware driver: construct "real" directory */
sprintf(dirname, "../%s/disc%d", dev->disk_name,
dev->first_minor >> dev->minor_shift);
dir = devfs_mk_dir(dirname + 3);
dev->de = dir;
}
dev->number = devfs_alloc_unique_number (&disc_numspace);
sprintf(symlink, "discs/disc%d", dev->number);
devfs_mk_symlink(symlink, dirname + pos);
dev->disk_de = devfs_register(dir, "disc", 0,
dev->major, dev->first_minor,
S_IFBLK | S_IRUSR | S_IWUSR, dev->fops, NULL);
#endif
}
static void devfs_create_cdrom(struct gendisk *dev)
{
#ifdef CONFIG_DEVFS_FS
char vname[23];
dev->number = devfs_alloc_unique_number(&cdrom_numspace);
sprintf(vname, "cdroms/cdrom%d", dev->number);
if (dev->de) {
int pos;
char rname[64];
dev->disk_de = devfs_register(dev->de, "cd", DEVFS_FL_DEFAULT,
dev->major, dev->first_minor,
S_IFBLK | S_IRUGO | S_IWUGO,
dev->fops, NULL);
pos = devfs_generate_path(dev->disk_de, rname+3, sizeof(rname)-3);
if (pos >= 0) {
strncpy(rname + pos, "../", 3);
devfs_mk_symlink(vname, rname + pos);
}
} else {
dev->disk_de = devfs_register (NULL, vname, DEVFS_FL_DEFAULT,
dev->major, dev->first_minor,
S_IFBLK | S_IRUGO | S_IWUGO,
dev->fops, NULL);
}
#endif
}
static void devfs_remove_partitions(struct gendisk *dev)
{
#ifdef CONFIG_DEVFS_FS
devfs_unregister(dev->disk_de);
dev->disk_de = NULL;
if (dev->flags & GENHD_FL_CD) {
if (dev->de)
devfs_remove("cdroms/cdrom%d", dev->number);
devfs_dealloc_unique_number(&cdrom_numspace, dev->number);
} else {
devfs_remove("discs/disc%d", dev->number);
if (!(dev->flags & GENHD_FL_DEVFS)) {
devfs_unregister(dev->de);
dev->de = NULL;
}
devfs_dealloc_unique_number(&disc_numspace, dev->number);
}
#endif
}
/*
* sysfs bindings for partitions
*/
......@@ -522,6 +435,7 @@ char *partition_name(dev_t dev)
{
struct gendisk *hd;
static char nomem [] = "<nomem>";
char b[BDEVNAME_SIZE];
struct dev_name *dname;
struct list_head *tmp;
int part;
......@@ -547,7 +461,7 @@ char *partition_name(dev_t dev)
put_disk(hd);
}
if (!dname->name) {
sprintf(dname->namebuf, "[dev %s]", kdevname(to_kdev_t(dev)));
sprintf(dname->namebuf, "[dev %s]", __bdevname(dev, b));
dname->name = dname->namebuf;
}
......
include/linux/devfs_fs_kernel.h
View file @ 57a7fa4a
......@@ -20,20 +20,9 @@
typedef struct devfs_entry * devfs_handle_t;
#ifdef CONFIG_DEVFS_FS
struct unique_numspace
{
spinlock_t init_lock;
unsigned char sem_initialised;
unsigned int num_free; /* Num free in bits */
unsigned int length; /* Array length in bytes */
unsigned long *bits;
struct semaphore semaphore;
};
#define UNIQUE_NUMBERSPACE_INITIALISER {SPIN_LOCK_UNLOCKED, 0, 0, 0, NULL}
struct gendisk;
#ifdef CONFIG_DEVFS_FS
extern devfs_handle_t devfs_register (devfs_handle_t dir, const char *name,
unsigned int flags,
unsigned int major, unsigned int minor,
......@@ -47,21 +36,11 @@ extern void devfs_remove(const char *fmt, ...)
extern int devfs_generate_path (devfs_handle_t de, char *path, int buflen);
extern int devfs_register_tape (devfs_handle_t de);
extern void devfs_unregister_tape(int num);
extern int devfs_alloc_unique_number (struct unique_numspace *space);
extern void devfs_dealloc_unique_number (struct unique_numspace *space,
int number);
extern void devfs_create_partitions(struct gendisk *dev);
extern void devfs_create_cdrom(struct gendisk *dev);
extern void devfs_remove_partitions(struct gendisk *dev);
extern void mount_devfs_fs (void);
#else /* CONFIG_DEVFS_FS */
struct unique_numspace
{
char dummy;
};
#define UNIQUE_NUMBERSPACE_INITIALISER {0}
static inline devfs_handle_t devfs_register (devfs_handle_t dir,
const char *name,
unsigned int flags,
......@@ -99,14 +78,14 @@ static inline int devfs_register_tape (devfs_handle_t de)
static inline void devfs_unregister_tape(int num)
{
}
static inline int devfs_alloc_unique_number (struct unique_numspace *space)
static inline void devfs_create_partitions(struct gendisk *dev)
{
return -1;
}
static inline void devfs_dealloc_unique_number (struct unique_numspace *space,
int number)
static inline void devfs_create_cdrom(struct gendisk *dev)
{
}
static inline void devfs_remove_partitions(struct gendisk *dev)
{
return;
}
static inline void mount_devfs_fs (void)
{
......
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