mirror of https://gitee.com/openkylin/linux.git
mtd: Kill mount_mtd()
Kill mount_mtd() as it has now been replaced by vfs_get_mtd_super() in the new mount API and nothing now uses it. Signed-off-by: David Howells <dhowells@redhat.com> cc: David Woodhouse <dwmw2@infradead.org> cc: Brian Norris <computersforpeace@gmail.com> cc: Boris Brezillon <bbrezillon@kernel.org> cc: Marek Vasut <marek.vasut@gmail.com> cc: Richard Weinberger <richard@nod.at> cc: linux-mtd@lists.infradead.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
David Howells
Al Viro
parent
ec10a24f10
commit
6d56e41843
|
|
@ -193,195 +193,6 @@ int get_tree_mtd(struct fs_context *fc,
|
|||
}
|
||||
EXPORT_SYMBOL_GPL(get_tree_mtd);
|
||||
|
||||
/*
|
||||
* compare superblocks to see if they're equivalent
|
||||
* - they are if the underlying MTD device is the same
|
||||
*/
|
||||
static int get_sb_mtd_compare(struct super_block *sb, void *_mtd)
|
||||
{
|
||||
struct mtd_info *mtd = _mtd;
|
||||
|
||||
if (sb->s_mtd == mtd) {
|
||||
pr_debug("MTDSB: Match on device %d (\"%s\")\n",
|
||||
mtd->index, mtd->name);
|
||||
return 1;
|
||||
}
|
||||
|
||||
pr_debug("MTDSB: No match, device %d (\"%s\"), device %d (\"%s\")\n",
|
||||
sb->s_mtd->index, sb->s_mtd->name, mtd->index, mtd->name);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* mark the superblock by the MTD device it is using
|
||||
* - set the device number to be the correct MTD block device for pesuperstence
|
||||
* of NFS exports
|
||||
*/
|
||||
static int get_sb_mtd_set(struct super_block *sb, void *_mtd)
|
||||
{
|
||||
struct mtd_info *mtd = _mtd;
|
||||
|
||||
sb->s_mtd = mtd;
|
||||
sb->s_dev = MKDEV(MTD_BLOCK_MAJOR, mtd->index);
|
||||
sb->s_bdi = bdi_get(mtd_bdi);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* get a superblock on an MTD-backed filesystem
|
||||
*/
|
||||
static struct dentry *mount_mtd_aux(struct file_system_type *fs_type, int flags,
|
||||
const char *dev_name, void *data,
|
||||
struct mtd_info *mtd,
|
||||
int (*fill_super)(struct super_block *, void *, int))
|
||||
{
|
||||
struct super_block *sb;
|
||||
int ret;
|
||||
|
||||
sb = sget(fs_type, get_sb_mtd_compare, get_sb_mtd_set, flags, mtd);
|
||||
if (IS_ERR(sb))
|
||||
goto out_error;
|
||||
|
||||
if (sb->s_root)
|
||||
goto already_mounted;
|
||||
|
||||
/* fresh new superblock */
|
||||
pr_debug("MTDSB: New superblock for device %d (\"%s\")\n",
|
||||
mtd->index, mtd->name);
|
||||
|
||||
ret = fill_super(sb, data, flags & SB_SILENT ? 1 : 0);
|
||||
if (ret < 0) {
|
||||
deactivate_locked_super(sb);
|
||||
return ERR_PTR(ret);
|
||||
}
|
||||
|
||||
/* go */
|
||||
sb->s_flags |= SB_ACTIVE;
|
||||
return dget(sb->s_root);
|
||||
|
||||
/* new mountpoint for an already mounted superblock */
|
||||
already_mounted:
|
||||
pr_debug("MTDSB: Device %d (\"%s\") is already mounted\n",
|
||||
mtd->index, mtd->name);
|
||||
put_mtd_device(mtd);
|
||||
return dget(sb->s_root);
|
||||
|
||||
out_error:
|
||||
put_mtd_device(mtd);
|
||||
return ERR_CAST(sb);
|
||||
}
|
||||
|
||||
/*
|
||||
* get a superblock on an MTD-backed filesystem by MTD device number
|
||||
*/
|
||||
static struct dentry *mount_mtd_nr(struct file_system_type *fs_type, int flags,
|
||||
const char *dev_name, void *data, int mtdnr,
|
||||
int (*fill_super)(struct super_block *, void *, int))
|
||||
{
|
||||
struct mtd_info *mtd;
|
||||
|
||||
mtd = get_mtd_device(NULL, mtdnr);
|
||||
if (IS_ERR(mtd)) {
|
||||
pr_debug("MTDSB: Device #%u doesn't appear to exist\n", mtdnr);
|
||||
return ERR_CAST(mtd);
|
||||
}
|
||||
|
||||
return mount_mtd_aux(fs_type, flags, dev_name, data, mtd, fill_super);
|
||||
}
|
||||
|
||||
/*
|
||||
* set up an MTD-based superblock
|
||||
*/
|
||||
struct dentry *mount_mtd(struct file_system_type *fs_type, int flags,
|
||||
const char *dev_name, void *data,
|
||||
int (*fill_super)(struct super_block *, void *, int))
|
||||
{
|
||||
#ifdef CONFIG_BLOCK
|
||||
struct block_device *bdev;
|
||||
int ret, major;
|
||||
#endif
|
||||
int mtdnr;
|
||||
|
||||
if (!dev_name)
|
||||
return ERR_PTR(-EINVAL);
|
||||
|
||||
pr_debug("MTDSB: dev_name \"%s\"\n", dev_name);
|
||||
|
||||
/* the preferred way of mounting in future; especially when
|
||||
* CONFIG_BLOCK=n - we specify the underlying MTD device by number or
|
||||
* by name, so that we don't require block device support to be present
|
||||
* in the kernel. */
|
||||
if (dev_name[0] == 'm' && dev_name[1] == 't' && dev_name[2] == 'd') {
|
||||
if (dev_name[3] == ':') {
|
||||
struct mtd_info *mtd;
|
||||
|
||||
/* mount by MTD device name */
|
||||
pr_debug("MTDSB: mtd:%%s, name \"%s\"\n",
|
||||
dev_name + 4);
|
||||
|
||||
mtd = get_mtd_device_nm(dev_name + 4);
|
||||
if (!IS_ERR(mtd))
|
||||
return mount_mtd_aux(
|
||||
fs_type, flags,
|
||||
dev_name, data, mtd,
|
||||
fill_super);
|
||||
|
||||
printk(KERN_NOTICE "MTD:"
|
||||
" MTD device with name \"%s\" not found.\n",
|
||||
dev_name + 4);
|
||||
|
||||
} else if (isdigit(dev_name[3])) {
|
||||
/* mount by MTD device number name */
|
||||
char *endptr;
|
||||
|
||||
mtdnr = simple_strtoul(dev_name + 3, &endptr, 0);
|
||||
if (!*endptr) {
|
||||
/* It was a valid number */
|
||||
pr_debug("MTDSB: mtd%%d, mtdnr %d\n",
|
||||
mtdnr);
|
||||
return mount_mtd_nr(fs_type, flags,
|
||||
dev_name, data,
|
||||
mtdnr, fill_super);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#ifdef CONFIG_BLOCK
|
||||
/* try the old way - the hack where we allowed users to mount
|
||||
* /dev/mtdblock$(n) but didn't actually _use_ the blockdev
|
||||
*/
|
||||
bdev = lookup_bdev(dev_name);
|
||||
if (IS_ERR(bdev)) {
|
||||
ret = PTR_ERR(bdev);
|
||||
pr_debug("MTDSB: lookup_bdev() returned %d\n", ret);
|
||||
return ERR_PTR(ret);
|
||||
}
|
||||
pr_debug("MTDSB: lookup_bdev() returned 0\n");
|
||||
|
||||
ret = -EINVAL;
|
||||
|
||||
major = MAJOR(bdev->bd_dev);
|
||||
mtdnr = MINOR(bdev->bd_dev);
|
||||
bdput(bdev);
|
||||
|
||||
if (major != MTD_BLOCK_MAJOR)
|
||||
goto not_an_MTD_device;
|
||||
|
||||
return mount_mtd_nr(fs_type, flags, dev_name, data, mtdnr, fill_super);
|
||||
|
||||
not_an_MTD_device:
|
||||
#endif /* CONFIG_BLOCK */
|
||||
|
||||
if (!(flags & SB_SILENT))
|
||||
printk(KERN_NOTICE
|
||||
"MTD: Attempt to mount non-MTD device \"%s\"\n",
|
||||
dev_name);
|
||||
return ERR_PTR(-EINVAL);
|
||||
}
|
||||
|
||||
EXPORT_SYMBOL_GPL(mount_mtd);
|
||||
|
||||
/*
|
||||
* destroy an MTD-based superblock
|
||||
*/
|
||||
|
|
|
|||
|
|
@ -17,9 +17,6 @@
|
|||
extern int get_tree_mtd(struct fs_context *fc,
|
||||
int (*fill_super)(struct super_block *sb,
|
||||
struct fs_context *fc));
|
||||
extern struct dentry *mount_mtd(struct file_system_type *fs_type, int flags,
|
||||
const char *dev_name, void *data,
|
||||
int (*fill_super)(struct super_block *, void *, int));
|
||||
extern void kill_mtd_super(struct super_block *sb);
|
||||
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue