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Commit e98181ff authored by Alexander Viro's avatar Alexander Viro Committed by Linus Torvalds
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[PATCH] devfs flags cleanup 

	* DEVFS_FL_AOPEN_NOTIFY removed (b0rken, used only by vt on the kernel
side, unus{ed,able} on the userland side
	* DEVFS_FL_HIDE removed (unused)
	* ->lock, ->open and ->aopen_notify removed (not used anymore)
	* code slightly cleaned up
parent 83ab9d19
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Inline Side-by-side
Showing with 8 additions and 114 deletions
drivers/char/vt.c
View file @ e98181ff
......@@ -2629,7 +2629,7 @@ static void __init con_init_devfs (void)
int i;
for (i = 0; i < console_driver.num; i++)
tty_register_devfs (&console_driver, DEVFS_FL_AOPEN_NOTIFY,
tty_register_devfs (&console_driver, DEVFS_FL_DEFAULT,
console_driver.minor_start + i);
}
......
fs/devfs/base.c
View file @ e98181ff
......@@ -703,8 +703,6 @@
#define MODE_DIR (S_IFDIR | S_IWUSR | S_IRUGO | S_IXUGO)
#define IS_HIDDEN(de) ( (de)->hide && !is_devfsd_or_child(fs_info) )
#define DEBUG_NONE 0x0000000
#define DEBUG_MODULE_LOAD 0x0000001
#define DEBUG_REGISTER 0x0000002
......@@ -783,10 +781,7 @@ struct fcb_type /* File, char, block type */
struct device_type device;
}
u;
spinlock_t lock; /* Lock for changes */
unsigned char aopen_notify:1;
unsigned char removable:1; /* Belongs in device_type, but save space */
unsigned char open:1; /* Not entirely correct */
unsigned char autogen:1; /* Belongs in device_type, but save space */
};
......@@ -828,7 +823,6 @@ struct devfs_entry
struct devfs_inode inode;
umode_t mode;
unsigned short namelen; /* I think 64k+ filenames are a way off... */
unsigned char hide:1;
unsigned char vfs_deletable:1;/* Whether the VFS may delete the entry */
char name[1]; /* This is just a dummy: the allocated array
is bigger. This is NULL-terminated */
......@@ -1015,8 +1009,6 @@ static struct devfs_entry *_devfs_alloc_entry (const char *name,
memset (new, 0, sizeof *new + namelen); /* Will set '\0' on name */
new->mode = mode;
if ( S_ISDIR (mode) ) rwlock_init (&new->u.dir.lock);
else if ( S_ISREG (mode) || S_ISCHR (mode) || S_ISBLK (mode) )
spin_lock_init (&new->u.fcb.lock);
atomic_set (&new->refcount, 1);
spin_lock (&counter_lock);
new->inode.ino = inode_counter++;
......@@ -1554,8 +1546,6 @@ devfs_handle_t devfs_register (devfs_handle_t dir, const char *name,
de->inode.gid = 0;
}
de->u.fcb.ops = ops;
de->u.fcb.aopen_notify = (flags & DEVFS_FL_AOPEN_NOTIFY) ? TRUE : FALSE;
de->hide = (flags & DEVFS_FL_HIDE) ? TRUE : FALSE;
if (flags & DEVFS_FL_REMOVABLE) de->u.fcb.removable = TRUE;
if ( ( err = _devfs_append_entry (dir, de, de->u.fcb.removable, NULL) )
!= 0 )
......@@ -1688,7 +1678,6 @@ static int devfs_do_symlink (devfs_handle_t dir, const char *name,
return -ENOTDIR;
}
de->info = info;
de->hide = (flags & DEVFS_FL_HIDE) ? TRUE : FALSE;
de->u.symlink.linkname = newlink;
de->u.symlink.length = linklength;
if ( ( err = _devfs_append_entry (dir, de, FALSE, NULL) ) != 0 )
......@@ -1826,54 +1815,6 @@ void devfs_remove(const char *fmt, ...)
}
}
/**
* devfs_get_flags - Get the flags for a devfs entry.
* @de: The handle to the device entry.
* @flags: The flags are written here.
*
* Returns 0 on success, else a negative error code.
*/
int devfs_get_flags (devfs_handle_t de, unsigned int *flags)
{
unsigned int fl = 0;
if (de == NULL) return -EINVAL;
VERIFY_ENTRY (de);
if (de->hide) fl |= DEVFS_FL_HIDE;
if ( S_ISCHR (de->mode) || S_ISBLK (de->mode) || S_ISREG (de->mode) )
{
if (de->u.fcb.aopen_notify) fl |= DEVFS_FL_AOPEN_NOTIFY;
if (de->u.fcb.removable) fl |= DEVFS_FL_REMOVABLE;
}
*flags = fl;
return 0;
} /* End Function devfs_get_flags */
/*
* devfs_set_flags - Set the flags for a devfs entry.
* @de: The handle to the device entry.
* @flags: The flags to set. Unset flags are cleared.
*
* Returns 0 on success, else a negative error code.
*/
int devfs_set_flags (devfs_handle_t de, unsigned int flags)
{
if (de == NULL) return -EINVAL;
VERIFY_ENTRY (de);
DPRINTK (DEBUG_SET_FLAGS, "(%s): flags: %x\n", de->name, flags);
de->hide = (flags & DEVFS_FL_HIDE) ? TRUE : FALSE;
if ( S_ISCHR (de->mode) || S_ISBLK (de->mode) || S_ISREG (de->mode) )
{
spin_lock (&de->u.fcb.lock);
de->u.fcb.aopen_notify = (flags & DEVFS_FL_AOPEN_NOTIFY) ? TRUE:FALSE;
spin_unlock (&de->u.fcb.lock);
}
return 0;
} /* End Function devfs_set_flags */
/**
* devfs_get_handle_from_inode - Get the devfs handle for a VFS inode.
* @inode: The VFS inode.
......@@ -2176,8 +2117,6 @@ EXPORT_SYMBOL(devfs_mk_symlink);
EXPORT_SYMBOL(devfs_mk_dir);
EXPORT_SYMBOL(devfs_get_handle);
EXPORT_SYMBOL(devfs_remove);
EXPORT_SYMBOL(devfs_get_flags);
EXPORT_SYMBOL(devfs_set_flags);
EXPORT_SYMBOL(devfs_get_handle_from_inode);
EXPORT_SYMBOL(devfs_generate_path);
EXPORT_SYMBOL(devfs_get_ops);
......@@ -2498,14 +2437,11 @@ static int devfs_readdir (struct file *file, void *dirent, filldir_t filldir)
count = file->f_pos - 2;
read_lock (&parent->u.dir.lock);
for (de = parent->u.dir.first; de && (count > 0); de = de->next)
if ( !IS_HIDDEN (de) ) --count;
--count;
devfs_get (de);
read_unlock (&parent->u.dir.lock);
/* Now add all remaining entries */
while (de)
{
if ( IS_HIDDEN (de) ) err = 0;
else
{
err = (*filldir) (dirent, de->name, de->namelen,
file->f_pos, de->inode.ino, de->mode >> 12);
......@@ -2515,7 +2451,6 @@ static int devfs_readdir (struct file *file, void *dirent, filldir_t filldir)
file->f_pos++;
++stored;
}
}
if (err == -EINVAL) break;
if (err < 0) return err;
read_lock (&parent->u.dir.lock);
......@@ -2563,17 +2498,7 @@ static int devfs_open (struct inode *inode, struct file *file)
else err = -ENODEV;
}
}
if (err < 0) return err;
/* Open was successful */
spin_lock (&df->lock);
err = df->open;
if (!err) df->open = TRUE; /* Was not already open */
spin_unlock (&df->lock);
if (err) return 0; /* Was already open */
if ( df->aopen_notify && !is_devfsd_or_child (fs_info) )
devfsd_notify_de (de, DEVFSD_NOTIFY_ASYNC_OPEN, inode->i_mode,
current->euid, current->egid, fs_info, 0);
return 0;
return err;
} /* End Function devfs_open */
static struct file_operations devfs_fops =
......@@ -2649,10 +2574,7 @@ static struct dentry_operations devfs_wait_dops =
static int devfs_d_delete (struct dentry *dentry)
{
int was_open;
struct inode *inode = dentry->d_inode;
struct devfs_entry *de;
struct fs_info *fs_info;
if (dentry->d_op == &devfs_wait_dops) dentry->d_op = &devfs_dops;
/* Unhash dentry if negative (has no inode) */
......@@ -2661,21 +2583,6 @@ static int devfs_d_delete (struct dentry *dentry)
DPRINTK (DEBUG_D_DELETE, "(%p): dropping negative dentry\n", dentry);
return 1;
}
fs_info = inode->i_sb->s_fs_info;
de = get_devfs_entry_from_vfs_inode (inode);
DPRINTK (DEBUG_D_DELETE, "(%p): inode: %p devfs_entry: %p\n",
dentry, inode, de);
if (de == NULL) return 0;
if ( !S_ISCHR (de->mode) && !S_ISBLK (de->mode) && !S_ISREG (de->mode) )
return 0;
spin_lock (&de->u.fcb.lock);
was_open = de->u.fcb.open;
if (was_open) de->u.fcb.open = FALSE;
spin_unlock (&de->u.fcb.lock);
if (!was_open) return 0;
if (de->u.fcb.aopen_notify)
devfsd_notify_de (de, DEVFSD_NOTIFY_CLOSE, inode->i_mode,
current->euid, current->egid, fs_info, 1);
return 0;
} /* End Function devfs_d_delete */
......
include/linux/devfs_fs_kernel.h
View file @ e98181ff
......@@ -13,11 +13,8 @@
#define DEVFS_FL_NONE 0x000 /* This helps to make code more readable
*/
#define DEVFS_FL_HIDE 0x001 /* Do not show entry in directory list */
#define DEVFS_FL_AUTO_DEVNUM 0x002 /* Automatically generate device number
*/
#define DEVFS_FL_AOPEN_NOTIFY 0x004 /* Asynchronously notify devfsd on open
*/
#define DEVFS_FL_REMOVABLE 0x008 /* This is a removable media device */
#define DEVFS_FL_WAIT 0x010 /* Wait for devfsd to finish */
#define DEVFS_FL_CURRENT_OWNER 0x020 /* Set initial ownership to current */
......@@ -58,8 +55,6 @@ extern devfs_handle_t devfs_mk_dir (devfs_handle_t dir, const char *name,
void *info);
extern devfs_handle_t devfs_get_handle (devfs_handle_t dir, const char *name,
int traverse_symlinks);
extern int devfs_get_flags (devfs_handle_t de, unsigned int *flags);
extern int devfs_set_flags (devfs_handle_t de, unsigned int flags);
extern devfs_handle_t devfs_get_handle_from_inode (struct inode *inode);
extern int devfs_generate_path (devfs_handle_t de, char *path, int buflen);
extern void *devfs_get_ops (devfs_handle_t de);
......@@ -136,14 +131,6 @@ static inline devfs_handle_t devfs_get_handle (devfs_handle_t dir,
static inline void devfs_remove(const char *fmt, ...)
{
}
static inline int devfs_get_flags (devfs_handle_t de, unsigned int *flags)
{
return 0;
}
static inline int devfs_set_flags (devfs_handle_t de, unsigned int flags)
{
return 0;
}
static inline devfs_handle_t devfs_get_handle_from_inode (struct inode *inode)
{
return NULL;
......
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