Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2)  *  linux/fs/hfs/super.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * Copyright (C) 1995-1997  Paul H. Hargrove
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * (C) 2003 Ardis Technologies <roman@ardistech.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * This file may be distributed under the terms of the GNU General Public License.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * This file contains hfs_read_super(), some of the super_ops and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  * init_hfs_fs() and exit_hfs_fs().  The remaining super_ops are in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  * inode.c since they deal with inodes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  * Based on the minix file system code, (C) 1991, 1992 by Linus Torvalds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/blkdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/backing-dev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/mount.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/nls.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <linux/parser.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #include <linux/vfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #include "hfs_fs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #include "btree.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) static struct kmem_cache *hfs_inode_cachep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) MODULE_IMPORT_NS(ANDROID_GKI_VFS_EXPORT_ONLY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) static int hfs_sync_fs(struct super_block *sb, int wait)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	hfs_mdb_commit(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41)  * hfs_put_super()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43)  * This is the put_super() entry in the super_operations structure for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44)  * HFS filesystems.  The purpose is to release the resources
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45)  * associated with the superblock sb.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) static void hfs_put_super(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	cancel_delayed_work_sync(&HFS_SB(sb)->mdb_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	hfs_mdb_close(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	/* release the MDB's resources */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	hfs_mdb_put(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) static void flush_mdb(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	struct hfs_sb_info *sbi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	struct super_block *sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	sbi = container_of(work, struct hfs_sb_info, mdb_work.work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	sb = sbi->sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	spin_lock(&sbi->work_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	sbi->work_queued = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	spin_unlock(&sbi->work_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	hfs_mdb_commit(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) void hfs_mark_mdb_dirty(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	struct hfs_sb_info *sbi = HFS_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	unsigned long delay;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	if (sb_rdonly(sb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	spin_lock(&sbi->work_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	if (!sbi->work_queued) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 		delay = msecs_to_jiffies(dirty_writeback_interval * 10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 		queue_delayed_work(system_long_wq, &sbi->mdb_work, delay);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 		sbi->work_queued = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	spin_unlock(&sbi->work_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88)  * hfs_statfs()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90)  * This is the statfs() entry in the super_operations structure for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91)  * HFS filesystems.  The purpose is to return various data about the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92)  * filesystem.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94)  * changed f_files/f_ffree to reflect the fs_ablock/free_ablocks.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) static int hfs_statfs(struct dentry *dentry, struct kstatfs *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	struct super_block *sb = dentry->d_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	buf->f_type = HFS_SUPER_MAGIC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	buf->f_bsize = sb->s_blocksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	buf->f_blocks = (u32)HFS_SB(sb)->fs_ablocks * HFS_SB(sb)->fs_div;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	buf->f_bfree = (u32)HFS_SB(sb)->free_ablocks * HFS_SB(sb)->fs_div;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	buf->f_bavail = buf->f_bfree;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	buf->f_files = HFS_SB(sb)->fs_ablocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	buf->f_ffree = HFS_SB(sb)->free_ablocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	buf->f_fsid = u64_to_fsid(id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	buf->f_namelen = HFS_NAMELEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) static int hfs_remount(struct super_block *sb, int *flags, char *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	sync_filesystem(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	*flags |= SB_NODIRATIME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	if ((bool)(*flags & SB_RDONLY) == sb_rdonly(sb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	if (!(*flags & SB_RDONLY)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		if (!(HFS_SB(sb)->mdb->drAtrb & cpu_to_be16(HFS_SB_ATTRIB_UNMNT))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 			pr_warn("filesystem was not cleanly unmounted, running fsck.hfs is recommended.  leaving read-only.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 			sb->s_flags |= SB_RDONLY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 			*flags |= SB_RDONLY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		} else if (HFS_SB(sb)->mdb->drAtrb & cpu_to_be16(HFS_SB_ATTRIB_SLOCK)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 			pr_warn("filesystem is marked locked, leaving read-only.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 			sb->s_flags |= SB_RDONLY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 			*flags |= SB_RDONLY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) static int hfs_show_options(struct seq_file *seq, struct dentry *root)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	struct hfs_sb_info *sbi = HFS_SB(root->d_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	if (sbi->s_creator != cpu_to_be32(0x3f3f3f3f))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		seq_show_option_n(seq, "creator", (char *)&sbi->s_creator, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	if (sbi->s_type != cpu_to_be32(0x3f3f3f3f))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 		seq_show_option_n(seq, "type", (char *)&sbi->s_type, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	seq_printf(seq, ",uid=%u,gid=%u",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 			from_kuid_munged(&init_user_ns, sbi->s_uid),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 			from_kgid_munged(&init_user_ns, sbi->s_gid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	if (sbi->s_file_umask != 0133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 		seq_printf(seq, ",file_umask=%o", sbi->s_file_umask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	if (sbi->s_dir_umask != 0022)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		seq_printf(seq, ",dir_umask=%o", sbi->s_dir_umask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	if (sbi->part >= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 		seq_printf(seq, ",part=%u", sbi->part);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	if (sbi->session >= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 		seq_printf(seq, ",session=%u", sbi->session);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	if (sbi->nls_disk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 		seq_printf(seq, ",codepage=%s", sbi->nls_disk->charset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	if (sbi->nls_io)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		seq_printf(seq, ",iocharset=%s", sbi->nls_io->charset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	if (sbi->s_quiet)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 		seq_printf(seq, ",quiet");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) static struct inode *hfs_alloc_inode(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	struct hfs_inode_info *i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	i = kmem_cache_alloc(hfs_inode_cachep, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	return i ? &i->vfs_inode : NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) static void hfs_free_inode(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	kmem_cache_free(hfs_inode_cachep, HFS_I(inode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) static const struct super_operations hfs_super_operations = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	.alloc_inode	= hfs_alloc_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	.free_inode	= hfs_free_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	.write_inode	= hfs_write_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	.evict_inode	= hfs_evict_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	.put_super	= hfs_put_super,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	.sync_fs	= hfs_sync_fs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	.statfs		= hfs_statfs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	.remount_fs     = hfs_remount,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	.show_options	= hfs_show_options,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	opt_uid, opt_gid, opt_umask, opt_file_umask, opt_dir_umask,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	opt_part, opt_session, opt_type, opt_creator, opt_quiet,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	opt_codepage, opt_iocharset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	opt_err
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) static const match_table_t tokens = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	{ opt_uid, "uid=%u" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	{ opt_gid, "gid=%u" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	{ opt_umask, "umask=%o" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	{ opt_file_umask, "file_umask=%o" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	{ opt_dir_umask, "dir_umask=%o" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	{ opt_part, "part=%u" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	{ opt_session, "session=%u" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	{ opt_type, "type=%s" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	{ opt_creator, "creator=%s" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	{ opt_quiet, "quiet" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	{ opt_codepage, "codepage=%s" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	{ opt_iocharset, "iocharset=%s" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	{ opt_err, NULL }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) static inline int match_fourchar(substring_t *arg, u32 *result)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	if (arg->to - arg->from != 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	memcpy(result, arg->from, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)  * parse_options()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)  * adapted from linux/fs/msdos/inode.c written 1992,93 by Werner Almesberger
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)  * This function is called by hfs_read_super() to parse the mount options.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) static int parse_options(char *options, struct hfs_sb_info *hsb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	char *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	substring_t args[MAX_OPT_ARGS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	int tmp, token;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	/* initialize the sb with defaults */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	hsb->s_uid = current_uid();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	hsb->s_gid = current_gid();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	hsb->s_file_umask = 0133;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	hsb->s_dir_umask = 0022;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	hsb->s_type = hsb->s_creator = cpu_to_be32(0x3f3f3f3f);	/* == '????' */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	hsb->s_quiet = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	hsb->part = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	hsb->session = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	if (!options)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 		return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	while ((p = strsep(&options, ",")) != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 		if (!*p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 		token = match_token(p, tokens, args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 		switch (token) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 		case opt_uid:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 			if (match_int(&args[0], &tmp)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 				pr_err("uid requires an argument\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 				return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 			hsb->s_uid = make_kuid(current_user_ns(), (uid_t)tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 			if (!uid_valid(hsb->s_uid)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 				pr_err("invalid uid %d\n", tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 				return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 		case opt_gid:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 			if (match_int(&args[0], &tmp)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 				pr_err("gid requires an argument\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 				return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 			hsb->s_gid = make_kgid(current_user_ns(), (gid_t)tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 			if (!gid_valid(hsb->s_gid)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 				pr_err("invalid gid %d\n", tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 				return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 		case opt_umask:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 			if (match_octal(&args[0], &tmp)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 				pr_err("umask requires a value\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 				return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 			hsb->s_file_umask = (umode_t)tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 			hsb->s_dir_umask = (umode_t)tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 		case opt_file_umask:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 			if (match_octal(&args[0], &tmp)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 				pr_err("file_umask requires a value\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 				return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 			hsb->s_file_umask = (umode_t)tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 		case opt_dir_umask:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 			if (match_octal(&args[0], &tmp)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 				pr_err("dir_umask requires a value\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 				return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 			hsb->s_dir_umask = (umode_t)tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 		case opt_part:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 			if (match_int(&args[0], &hsb->part)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 				pr_err("part requires an argument\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 				return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 		case opt_session:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 			if (match_int(&args[0], &hsb->session)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 				pr_err("session requires an argument\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 				return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 		case opt_type:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 			if (match_fourchar(&args[0], &hsb->s_type)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 				pr_err("type requires a 4 character value\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 				return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 		case opt_creator:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 			if (match_fourchar(&args[0], &hsb->s_creator)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 				pr_err("creator requires a 4 character value\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 				return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 		case opt_quiet:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 			hsb->s_quiet = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 		case opt_codepage:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 			if (hsb->nls_disk) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 				pr_err("unable to change codepage\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 				return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 			p = match_strdup(&args[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 			if (p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 				hsb->nls_disk = load_nls(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 			if (!hsb->nls_disk) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 				pr_err("unable to load codepage \"%s\"\n", p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 				kfree(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 				return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 			kfree(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 		case opt_iocharset:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 			if (hsb->nls_io) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 				pr_err("unable to change iocharset\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 				return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 			p = match_strdup(&args[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 			if (p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 				hsb->nls_io = load_nls(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 			if (!hsb->nls_io) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 				pr_err("unable to load iocharset \"%s\"\n", p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 				kfree(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 				return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 			kfree(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 		default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 			return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 	if (hsb->nls_disk && !hsb->nls_io) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 		hsb->nls_io = load_nls_default();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 		if (!hsb->nls_io) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 			pr_err("unable to load default iocharset\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 			return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 	hsb->s_dir_umask &= 0777;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 	hsb->s_file_umask &= 0577;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 	return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369)  * hfs_read_super()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371)  * This is the function that is responsible for mounting an HFS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372)  * filesystem.	It performs all the tasks necessary to get enough data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373)  * from the disk to read the root inode.  This includes parsing the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)  * mount options, dealing with Macintosh partitions, reading the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375)  * superblock and the allocation bitmap blocks, calling
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376)  * hfs_btree_init() to get the necessary data about the extents and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)  * catalog B-trees and, finally, reading the root inode into memory.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) static int hfs_fill_super(struct super_block *sb, void *data, int silent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 	struct hfs_sb_info *sbi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 	struct hfs_find_data fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 	hfs_cat_rec rec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 	struct inode *root_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 	int res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) 	sbi = kzalloc(sizeof(struct hfs_sb_info), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 	if (!sbi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 	sbi->sb = sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) 	sb->s_fs_info = sbi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) 	spin_lock_init(&sbi->work_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 	INIT_DELAYED_WORK(&sbi->mdb_work, flush_mdb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) 	res = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) 	if (!parse_options((char *)data, sbi)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) 		pr_err("unable to parse mount options\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) 		goto bail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) 	sb->s_op = &hfs_super_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) 	sb->s_xattr = hfs_xattr_handlers;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) 	sb->s_flags |= SB_NODIRATIME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) 	mutex_init(&sbi->bitmap_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) 	res = hfs_mdb_get(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) 	if (res) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) 		if (!silent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) 			pr_warn("can't find a HFS filesystem on dev %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) 				hfs_mdb_name(sb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) 		res = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) 		goto bail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) 	/* try to get the root inode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) 	res = hfs_find_init(HFS_SB(sb)->cat_tree, &fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) 	if (res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) 		goto bail_no_root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) 	res = hfs_cat_find_brec(sb, HFS_ROOT_CNID, &fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) 	if (!res) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) 		if (fd.entrylength > sizeof(rec) || fd.entrylength < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) 			res =  -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) 			goto bail_hfs_find;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) 		hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, fd.entrylength);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) 	if (res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) 		goto bail_hfs_find;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) 	res = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) 	root_inode = hfs_iget(sb, &fd.search_key->cat, &rec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) 	hfs_find_exit(&fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) 	if (!root_inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) 		goto bail_no_root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) 	sb->s_d_op = &hfs_dentry_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) 	res = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) 	sb->s_root = d_make_root(root_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) 	if (!sb->s_root)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) 		goto bail_no_root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) 	/* everything's okay */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) bail_hfs_find:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) 	hfs_find_exit(&fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) bail_no_root:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) 	pr_err("get root inode failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) bail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) 	hfs_mdb_put(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) 	return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) static struct dentry *hfs_mount(struct file_system_type *fs_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) 		      int flags, const char *dev_name, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) 	return mount_bdev(fs_type, flags, dev_name, data, hfs_fill_super);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) static struct file_system_type hfs_fs_type = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) 	.owner		= THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) 	.name		= "hfs",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) 	.mount		= hfs_mount,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) 	.kill_sb	= kill_block_super,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) 	.fs_flags	= FS_REQUIRES_DEV,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) MODULE_ALIAS_FS("hfs");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) static void hfs_init_once(void *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) 	struct hfs_inode_info *i = p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) 	inode_init_once(&i->vfs_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) static int __init init_hfs_fs(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) 	hfs_inode_cachep = kmem_cache_create("hfs_inode_cache",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) 		sizeof(struct hfs_inode_info), 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) 		SLAB_HWCACHE_ALIGN|SLAB_ACCOUNT, hfs_init_once);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) 	if (!hfs_inode_cachep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) 	err = register_filesystem(&hfs_fs_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) 		kmem_cache_destroy(hfs_inode_cachep);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) static void __exit exit_hfs_fs(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) 	unregister_filesystem(&hfs_fs_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) 	 * Make sure all delayed rcu free inodes are flushed before we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) 	 * destroy cache.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) 	rcu_barrier();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) 	kmem_cache_destroy(hfs_inode_cachep);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) module_init(init_hfs_fs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) module_exit(exit_hfs_fs)