2005-04-17 06:20:36 +08:00
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/*
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* linux/fs/hfs/super.c
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*
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* Copyright (C) 1995-1997 Paul H. Hargrove
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* (C) 2003 Ardis Technologies <roman@ardistech.com>
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* This file may be distributed under the terms of the GNU General Public License.
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*
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* This file contains hfs_read_super(), some of the super_ops and
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2008-02-06 17:37:10 +08:00
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* init_hfs_fs() and exit_hfs_fs(). The remaining super_ops are in
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2005-04-17 06:20:36 +08:00
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* inode.c since they deal with inodes.
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*
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* Based on the minix file system code, (C) 1991, 1992 by Linus Torvalds
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*/
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#include <linux/module.h>
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#include <linux/blkdev.h>
|
2015-05-23 05:13:32 +08:00
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#include <linux/backing-dev.h>
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2005-09-07 06:18:48 +08:00
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#include <linux/mount.h>
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2005-04-17 06:20:36 +08:00
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#include <linux/init.h>
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2005-09-07 06:18:49 +08:00
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#include <linux/nls.h>
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2005-04-17 06:20:36 +08:00
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#include <linux/parser.h>
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2005-09-07 06:18:48 +08:00
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#include <linux/seq_file.h>
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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 16:04:11 +08:00
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#include <linux/slab.h>
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2005-04-17 06:20:36 +08:00
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#include <linux/vfs.h>
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#include "hfs_fs.h"
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#include "btree.h"
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2006-12-07 12:33:20 +08:00
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static struct kmem_cache *hfs_inode_cachep;
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2005-04-17 06:20:36 +08:00
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MODULE_LICENSE("GPL");
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2009-06-08 16:04:54 +08:00
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static int hfs_sync_fs(struct super_block *sb, int wait)
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{
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hfs_mdb_commit(sb);
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return 0;
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}
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2005-04-17 06:20:36 +08:00
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/*
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* hfs_put_super()
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*
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* This is the put_super() entry in the super_operations structure for
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* HFS filesystems. The purpose is to release the resources
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* associated with the superblock sb.
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*/
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static void hfs_put_super(struct super_block *sb)
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{
|
2012-07-12 22:28:49 +08:00
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cancel_delayed_work_sync(&HFS_SB(sb)->mdb_work);
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2005-04-17 06:20:36 +08:00
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hfs_mdb_close(sb);
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/* release the MDB's resources */
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hfs_mdb_put(sb);
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}
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2012-07-12 22:28:49 +08:00
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static void flush_mdb(struct work_struct *work)
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{
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struct hfs_sb_info *sbi;
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struct super_block *sb;
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sbi = container_of(work, struct hfs_sb_info, mdb_work.work);
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sb = sbi->sb;
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spin_lock(&sbi->work_lock);
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sbi->work_queued = 0;
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spin_unlock(&sbi->work_lock);
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hfs_mdb_commit(sb);
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}
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void hfs_mark_mdb_dirty(struct super_block *sb)
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{
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struct hfs_sb_info *sbi = HFS_SB(sb);
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unsigned long delay;
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2017-07-17 15:45:34 +08:00
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if (sb_rdonly(sb))
|
2012-07-12 22:28:49 +08:00
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return;
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spin_lock(&sbi->work_lock);
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if (!sbi->work_queued) {
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delay = msecs_to_jiffies(dirty_writeback_interval * 10);
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queue_delayed_work(system_long_wq, &sbi->mdb_work, delay);
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sbi->work_queued = 1;
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}
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spin_unlock(&sbi->work_lock);
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}
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|
2005-04-17 06:20:36 +08:00
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/*
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* hfs_statfs()
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*
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* This is the statfs() entry in the super_operations structure for
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* HFS filesystems. The purpose is to return various data about the
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* filesystem.
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*
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* changed f_files/f_ffree to reflect the fs_ablock/free_ablocks.
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*/
|
2006-06-23 17:02:58 +08:00
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static int hfs_statfs(struct dentry *dentry, struct kstatfs *buf)
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2005-04-17 06:20:36 +08:00
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{
|
2006-06-23 17:02:58 +08:00
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struct super_block *sb = dentry->d_sb;
|
2009-04-03 07:59:35 +08:00
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u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
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2006-06-23 17:02:58 +08:00
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2005-04-17 06:20:36 +08:00
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buf->f_type = HFS_SUPER_MAGIC;
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buf->f_bsize = sb->s_blocksize;
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buf->f_blocks = (u32)HFS_SB(sb)->fs_ablocks * HFS_SB(sb)->fs_div;
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buf->f_bfree = (u32)HFS_SB(sb)->free_ablocks * HFS_SB(sb)->fs_div;
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buf->f_bavail = buf->f_bfree;
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buf->f_files = HFS_SB(sb)->fs_ablocks;
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buf->f_ffree = HFS_SB(sb)->free_ablocks;
|
2020-09-19 04:45:50 +08:00
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buf->f_fsid = u64_to_fsid(id);
|
2005-04-17 06:20:36 +08:00
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buf->f_namelen = HFS_NAMELEN;
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return 0;
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}
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static int hfs_remount(struct super_block *sb, int *flags, char *data)
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{
|
2014-03-13 22:14:33 +08:00
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|
sync_filesystem(sb);
|
2017-11-28 05:05:09 +08:00
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|
*flags |= SB_NODIRATIME;
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if ((bool)(*flags & SB_RDONLY) == sb_rdonly(sb))
|
2005-04-17 06:20:36 +08:00
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return 0;
|
2017-11-28 05:05:09 +08:00
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if (!(*flags & SB_RDONLY)) {
|
2005-04-17 06:20:36 +08:00
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if (!(HFS_SB(sb)->mdb->drAtrb & cpu_to_be16(HFS_SB_ATTRIB_UNMNT))) {
|
2013-05-01 06:27:55 +08:00
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pr_warn("filesystem was not cleanly unmounted, running fsck.hfs is recommended. leaving read-only.\n");
|
2017-11-28 05:05:09 +08:00
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sb->s_flags |= SB_RDONLY;
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*flags |= SB_RDONLY;
|
2005-04-17 06:20:36 +08:00
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} else if (HFS_SB(sb)->mdb->drAtrb & cpu_to_be16(HFS_SB_ATTRIB_SLOCK)) {
|
2013-05-01 06:27:55 +08:00
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pr_warn("filesystem is marked locked, leaving read-only.\n");
|
2017-11-28 05:05:09 +08:00
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sb->s_flags |= SB_RDONLY;
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*flags |= SB_RDONLY;
|
2005-04-17 06:20:36 +08:00
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}
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}
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return 0;
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|
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}
|
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|
2011-12-09 10:32:45 +08:00
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static int hfs_show_options(struct seq_file *seq, struct dentry *root)
|
2005-09-07 06:18:48 +08:00
|
|
|
{
|
2011-12-09 10:32:45 +08:00
|
|
|
struct hfs_sb_info *sbi = HFS_SB(root->d_sb);
|
2005-09-07 06:18:48 +08:00
|
|
|
|
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|
|
if (sbi->s_creator != cpu_to_be32(0x3f3f3f3f))
|
fs: create and use seq_show_option for escaping
Many file systems that implement the show_options hook fail to correctly
escape their output which could lead to unescaped characters (e.g. new
lines) leaking into /proc/mounts and /proc/[pid]/mountinfo files. This
could lead to confusion, spoofed entries (resulting in things like
systemd issuing false d-bus "mount" notifications), and who knows what
else. This looks like it would only be the root user stepping on
themselves, but it's possible weird things could happen in containers or
in other situations with delegated mount privileges.
Here's an example using overlay with setuid fusermount trusting the
contents of /proc/mounts (via the /etc/mtab symlink). Imagine the use
of "sudo" is something more sneaky:
$ BASE="ovl"
$ MNT="$BASE/mnt"
$ LOW="$BASE/lower"
$ UP="$BASE/upper"
$ WORK="$BASE/work/ 0 0
none /proc fuse.pwn user_id=1000"
$ mkdir -p "$LOW" "$UP" "$WORK"
$ sudo mount -t overlay -o "lowerdir=$LOW,upperdir=$UP,workdir=$WORK" none /mnt
$ cat /proc/mounts
none /root/ovl/mnt overlay rw,relatime,lowerdir=ovl/lower,upperdir=ovl/upper,workdir=ovl/work/ 0 0
none /proc fuse.pwn user_id=1000 0 0
$ fusermount -u /proc
$ cat /proc/mounts
cat: /proc/mounts: No such file or directory
This fixes the problem by adding new seq_show_option and
seq_show_option_n helpers, and updating the vulnerable show_option
handlers to use them as needed. Some, like SELinux, need to be open
coded due to unusual existing escape mechanisms.
[akpm@linux-foundation.org: add lost chunk, per Kees]
[keescook@chromium.org: seq_show_option should be using const parameters]
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Acked-by: Jan Kara <jack@suse.com>
Acked-by: Paul Moore <paul@paul-moore.com>
Cc: J. R. Okajima <hooanon05g@gmail.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-09-05 06:44:57 +08:00
|
|
|
seq_show_option_n(seq, "creator", (char *)&sbi->s_creator, 4);
|
2005-09-07 06:18:48 +08:00
|
|
|
if (sbi->s_type != cpu_to_be32(0x3f3f3f3f))
|
fs: create and use seq_show_option for escaping
Many file systems that implement the show_options hook fail to correctly
escape their output which could lead to unescaped characters (e.g. new
lines) leaking into /proc/mounts and /proc/[pid]/mountinfo files. This
could lead to confusion, spoofed entries (resulting in things like
systemd issuing false d-bus "mount" notifications), and who knows what
else. This looks like it would only be the root user stepping on
themselves, but it's possible weird things could happen in containers or
in other situations with delegated mount privileges.
Here's an example using overlay with setuid fusermount trusting the
contents of /proc/mounts (via the /etc/mtab symlink). Imagine the use
of "sudo" is something more sneaky:
$ BASE="ovl"
$ MNT="$BASE/mnt"
$ LOW="$BASE/lower"
$ UP="$BASE/upper"
$ WORK="$BASE/work/ 0 0
none /proc fuse.pwn user_id=1000"
$ mkdir -p "$LOW" "$UP" "$WORK"
$ sudo mount -t overlay -o "lowerdir=$LOW,upperdir=$UP,workdir=$WORK" none /mnt
$ cat /proc/mounts
none /root/ovl/mnt overlay rw,relatime,lowerdir=ovl/lower,upperdir=ovl/upper,workdir=ovl/work/ 0 0
none /proc fuse.pwn user_id=1000 0 0
$ fusermount -u /proc
$ cat /proc/mounts
cat: /proc/mounts: No such file or directory
This fixes the problem by adding new seq_show_option and
seq_show_option_n helpers, and updating the vulnerable show_option
handlers to use them as needed. Some, like SELinux, need to be open
coded due to unusual existing escape mechanisms.
[akpm@linux-foundation.org: add lost chunk, per Kees]
[keescook@chromium.org: seq_show_option should be using const parameters]
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Acked-by: Jan Kara <jack@suse.com>
Acked-by: Paul Moore <paul@paul-moore.com>
Cc: J. R. Okajima <hooanon05g@gmail.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-09-05 06:44:57 +08:00
|
|
|
seq_show_option_n(seq, "type", (char *)&sbi->s_type, 4);
|
2012-02-08 08:26:59 +08:00
|
|
|
seq_printf(seq, ",uid=%u,gid=%u",
|
|
|
|
from_kuid_munged(&init_user_ns, sbi->s_uid),
|
|
|
|
from_kgid_munged(&init_user_ns, sbi->s_gid));
|
2005-09-07 06:18:48 +08:00
|
|
|
if (sbi->s_file_umask != 0133)
|
|
|
|
seq_printf(seq, ",file_umask=%o", sbi->s_file_umask);
|
|
|
|
if (sbi->s_dir_umask != 0022)
|
|
|
|
seq_printf(seq, ",dir_umask=%o", sbi->s_dir_umask);
|
|
|
|
if (sbi->part >= 0)
|
|
|
|
seq_printf(seq, ",part=%u", sbi->part);
|
|
|
|
if (sbi->session >= 0)
|
|
|
|
seq_printf(seq, ",session=%u", sbi->session);
|
2005-09-07 06:18:49 +08:00
|
|
|
if (sbi->nls_disk)
|
|
|
|
seq_printf(seq, ",codepage=%s", sbi->nls_disk->charset);
|
|
|
|
if (sbi->nls_io)
|
|
|
|
seq_printf(seq, ",iocharset=%s", sbi->nls_io->charset);
|
2005-09-07 06:18:48 +08:00
|
|
|
if (sbi->s_quiet)
|
|
|
|
seq_printf(seq, ",quiet");
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
static struct inode *hfs_alloc_inode(struct super_block *sb)
|
|
|
|
{
|
|
|
|
struct hfs_inode_info *i;
|
|
|
|
|
2006-12-07 12:33:17 +08:00
|
|
|
i = kmem_cache_alloc(hfs_inode_cachep, GFP_KERNEL);
|
2005-04-17 06:20:36 +08:00
|
|
|
return i ? &i->vfs_inode : NULL;
|
|
|
|
}
|
|
|
|
|
2019-04-16 07:48:07 +08:00
|
|
|
static void hfs_free_inode(struct inode *inode)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
kmem_cache_free(hfs_inode_cachep, HFS_I(inode));
|
|
|
|
}
|
|
|
|
|
2007-02-12 16:55:41 +08:00
|
|
|
static const struct super_operations hfs_super_operations = {
|
2005-04-17 06:20:36 +08:00
|
|
|
.alloc_inode = hfs_alloc_inode,
|
2019-04-16 07:48:07 +08:00
|
|
|
.free_inode = hfs_free_inode,
|
2005-04-17 06:20:36 +08:00
|
|
|
.write_inode = hfs_write_inode,
|
2010-06-08 02:34:48 +08:00
|
|
|
.evict_inode = hfs_evict_inode,
|
2005-04-17 06:20:36 +08:00
|
|
|
.put_super = hfs_put_super,
|
2009-06-08 16:04:54 +08:00
|
|
|
.sync_fs = hfs_sync_fs,
|
2005-04-17 06:20:36 +08:00
|
|
|
.statfs = hfs_statfs,
|
|
|
|
.remount_fs = hfs_remount,
|
2005-09-07 06:18:48 +08:00
|
|
|
.show_options = hfs_show_options,
|
2005-04-17 06:20:36 +08:00
|
|
|
};
|
|
|
|
|
|
|
|
enum {
|
|
|
|
opt_uid, opt_gid, opt_umask, opt_file_umask, opt_dir_umask,
|
|
|
|
opt_part, opt_session, opt_type, opt_creator, opt_quiet,
|
2005-09-07 06:18:49 +08:00
|
|
|
opt_codepage, opt_iocharset,
|
2005-04-17 06:20:36 +08:00
|
|
|
opt_err
|
|
|
|
};
|
|
|
|
|
2008-10-13 17:46:57 +08:00
|
|
|
static const match_table_t tokens = {
|
2005-04-17 06:20:36 +08:00
|
|
|
{ opt_uid, "uid=%u" },
|
|
|
|
{ opt_gid, "gid=%u" },
|
|
|
|
{ opt_umask, "umask=%o" },
|
|
|
|
{ opt_file_umask, "file_umask=%o" },
|
|
|
|
{ opt_dir_umask, "dir_umask=%o" },
|
|
|
|
{ opt_part, "part=%u" },
|
|
|
|
{ opt_session, "session=%u" },
|
|
|
|
{ opt_type, "type=%s" },
|
|
|
|
{ opt_creator, "creator=%s" },
|
|
|
|
{ opt_quiet, "quiet" },
|
2005-09-07 06:18:49 +08:00
|
|
|
{ opt_codepage, "codepage=%s" },
|
|
|
|
{ opt_iocharset, "iocharset=%s" },
|
2005-04-17 06:20:36 +08:00
|
|
|
{ opt_err, NULL }
|
|
|
|
};
|
|
|
|
|
|
|
|
static inline int match_fourchar(substring_t *arg, u32 *result)
|
|
|
|
{
|
|
|
|
if (arg->to - arg->from != 4)
|
|
|
|
return -EINVAL;
|
|
|
|
memcpy(result, arg->from, 4);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* parse_options()
|
|
|
|
*
|
|
|
|
* adapted from linux/fs/msdos/inode.c written 1992,93 by Werner Almesberger
|
|
|
|
* This function is called by hfs_read_super() to parse the mount options.
|
|
|
|
*/
|
|
|
|
static int parse_options(char *options, struct hfs_sb_info *hsb)
|
|
|
|
{
|
|
|
|
char *p;
|
|
|
|
substring_t args[MAX_OPT_ARGS];
|
|
|
|
int tmp, token;
|
|
|
|
|
|
|
|
/* initialize the sb with defaults */
|
2008-11-14 07:38:54 +08:00
|
|
|
hsb->s_uid = current_uid();
|
|
|
|
hsb->s_gid = current_gid();
|
2005-04-17 06:20:36 +08:00
|
|
|
hsb->s_file_umask = 0133;
|
|
|
|
hsb->s_dir_umask = 0022;
|
|
|
|
hsb->s_type = hsb->s_creator = cpu_to_be32(0x3f3f3f3f); /* == '????' */
|
|
|
|
hsb->s_quiet = 0;
|
|
|
|
hsb->part = -1;
|
|
|
|
hsb->session = -1;
|
|
|
|
|
|
|
|
if (!options)
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
while ((p = strsep(&options, ",")) != NULL) {
|
|
|
|
if (!*p)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
token = match_token(p, tokens, args);
|
|
|
|
switch (token) {
|
|
|
|
case opt_uid:
|
|
|
|
if (match_int(&args[0], &tmp)) {
|
2013-05-01 06:27:55 +08:00
|
|
|
pr_err("uid requires an argument\n");
|
2005-04-17 06:20:36 +08:00
|
|
|
return 0;
|
|
|
|
}
|
2012-02-08 08:26:59 +08:00
|
|
|
hsb->s_uid = make_kuid(current_user_ns(), (uid_t)tmp);
|
|
|
|
if (!uid_valid(hsb->s_uid)) {
|
2013-05-01 06:27:55 +08:00
|
|
|
pr_err("invalid uid %d\n", tmp);
|
2012-02-08 08:26:59 +08:00
|
|
|
return 0;
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
break;
|
|
|
|
case opt_gid:
|
|
|
|
if (match_int(&args[0], &tmp)) {
|
2013-05-01 06:27:55 +08:00
|
|
|
pr_err("gid requires an argument\n");
|
2005-04-17 06:20:36 +08:00
|
|
|
return 0;
|
|
|
|
}
|
2012-02-08 08:26:59 +08:00
|
|
|
hsb->s_gid = make_kgid(current_user_ns(), (gid_t)tmp);
|
|
|
|
if (!gid_valid(hsb->s_gid)) {
|
2013-05-01 06:27:55 +08:00
|
|
|
pr_err("invalid gid %d\n", tmp);
|
2012-02-08 08:26:59 +08:00
|
|
|
return 0;
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
break;
|
|
|
|
case opt_umask:
|
|
|
|
if (match_octal(&args[0], &tmp)) {
|
2013-05-01 06:27:55 +08:00
|
|
|
pr_err("umask requires a value\n");
|
2005-04-17 06:20:36 +08:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
hsb->s_file_umask = (umode_t)tmp;
|
|
|
|
hsb->s_dir_umask = (umode_t)tmp;
|
|
|
|
break;
|
|
|
|
case opt_file_umask:
|
|
|
|
if (match_octal(&args[0], &tmp)) {
|
2013-05-01 06:27:55 +08:00
|
|
|
pr_err("file_umask requires a value\n");
|
2005-04-17 06:20:36 +08:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
hsb->s_file_umask = (umode_t)tmp;
|
|
|
|
break;
|
|
|
|
case opt_dir_umask:
|
|
|
|
if (match_octal(&args[0], &tmp)) {
|
2013-05-01 06:27:55 +08:00
|
|
|
pr_err("dir_umask requires a value\n");
|
2005-04-17 06:20:36 +08:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
hsb->s_dir_umask = (umode_t)tmp;
|
|
|
|
break;
|
|
|
|
case opt_part:
|
|
|
|
if (match_int(&args[0], &hsb->part)) {
|
2013-05-01 06:27:55 +08:00
|
|
|
pr_err("part requires an argument\n");
|
2005-04-17 06:20:36 +08:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case opt_session:
|
|
|
|
if (match_int(&args[0], &hsb->session)) {
|
2013-05-01 06:27:55 +08:00
|
|
|
pr_err("session requires an argument\n");
|
2005-04-17 06:20:36 +08:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case opt_type:
|
|
|
|
if (match_fourchar(&args[0], &hsb->s_type)) {
|
2013-05-01 06:27:55 +08:00
|
|
|
pr_err("type requires a 4 character value\n");
|
2005-04-17 06:20:36 +08:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case opt_creator:
|
|
|
|
if (match_fourchar(&args[0], &hsb->s_creator)) {
|
2013-05-01 06:27:55 +08:00
|
|
|
pr_err("creator requires a 4 character value\n");
|
2005-04-17 06:20:36 +08:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case opt_quiet:
|
|
|
|
hsb->s_quiet = 1;
|
|
|
|
break;
|
2005-09-07 06:18:49 +08:00
|
|
|
case opt_codepage:
|
|
|
|
if (hsb->nls_disk) {
|
2013-05-01 06:27:55 +08:00
|
|
|
pr_err("unable to change codepage\n");
|
2005-09-07 06:18:49 +08:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
p = match_strdup(&args[0]);
|
2008-04-29 15:59:07 +08:00
|
|
|
if (p)
|
|
|
|
hsb->nls_disk = load_nls(p);
|
2005-09-07 06:18:49 +08:00
|
|
|
if (!hsb->nls_disk) {
|
2013-05-01 06:27:55 +08:00
|
|
|
pr_err("unable to load codepage \"%s\"\n", p);
|
2005-09-07 06:18:49 +08:00
|
|
|
kfree(p);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
kfree(p);
|
|
|
|
break;
|
|
|
|
case opt_iocharset:
|
|
|
|
if (hsb->nls_io) {
|
2013-05-01 06:27:55 +08:00
|
|
|
pr_err("unable to change iocharset\n");
|
2005-09-07 06:18:49 +08:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
p = match_strdup(&args[0]);
|
2008-04-29 15:59:07 +08:00
|
|
|
if (p)
|
|
|
|
hsb->nls_io = load_nls(p);
|
2005-09-07 06:18:49 +08:00
|
|
|
if (!hsb->nls_io) {
|
2013-05-01 06:27:55 +08:00
|
|
|
pr_err("unable to load iocharset \"%s\"\n", p);
|
2005-09-07 06:18:49 +08:00
|
|
|
kfree(p);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
kfree(p);
|
|
|
|
break;
|
2005-04-17 06:20:36 +08:00
|
|
|
default:
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2005-09-07 06:18:49 +08:00
|
|
|
if (hsb->nls_disk && !hsb->nls_io) {
|
|
|
|
hsb->nls_io = load_nls_default();
|
|
|
|
if (!hsb->nls_io) {
|
2013-05-01 06:27:55 +08:00
|
|
|
pr_err("unable to load default iocharset\n");
|
2005-09-07 06:18:49 +08:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
hsb->s_dir_umask &= 0777;
|
|
|
|
hsb->s_file_umask &= 0577;
|
|
|
|
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* hfs_read_super()
|
|
|
|
*
|
|
|
|
* This is the function that is responsible for mounting an HFS
|
|
|
|
* filesystem. It performs all the tasks necessary to get enough data
|
|
|
|
* from the disk to read the root inode. This includes parsing the
|
|
|
|
* mount options, dealing with Macintosh partitions, reading the
|
|
|
|
* superblock and the allocation bitmap blocks, calling
|
|
|
|
* hfs_btree_init() to get the necessary data about the extents and
|
|
|
|
* catalog B-trees and, finally, reading the root inode into memory.
|
|
|
|
*/
|
|
|
|
static int hfs_fill_super(struct super_block *sb, void *data, int silent)
|
|
|
|
{
|
|
|
|
struct hfs_sb_info *sbi;
|
|
|
|
struct hfs_find_data fd;
|
|
|
|
hfs_cat_rec rec;
|
|
|
|
struct inode *root_inode;
|
|
|
|
int res;
|
|
|
|
|
2006-09-27 16:49:37 +08:00
|
|
|
sbi = kzalloc(sizeof(struct hfs_sb_info), GFP_KERNEL);
|
2010-02-24 20:25:30 +08:00
|
|
|
if (!sbi)
|
2005-04-17 06:20:36 +08:00
|
|
|
return -ENOMEM;
|
2010-02-24 20:25:30 +08:00
|
|
|
|
2012-07-12 22:28:48 +08:00
|
|
|
sbi->sb = sb;
|
2005-04-17 06:20:36 +08:00
|
|
|
sb->s_fs_info = sbi;
|
2012-07-12 22:28:49 +08:00
|
|
|
spin_lock_init(&sbi->work_lock);
|
|
|
|
INIT_DELAYED_WORK(&sbi->mdb_work, flush_mdb);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
res = -EINVAL;
|
|
|
|
if (!parse_options((char *)data, sbi)) {
|
2013-05-01 06:27:55 +08:00
|
|
|
pr_err("unable to parse mount options\n");
|
2005-05-01 23:59:16 +08:00
|
|
|
goto bail;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
sb->s_op = &hfs_super_operations;
|
2016-09-29 23:48:32 +08:00
|
|
|
sb->s_xattr = hfs_xattr_handlers;
|
2017-11-28 05:05:09 +08:00
|
|
|
sb->s_flags |= SB_NODIRATIME;
|
2008-07-25 16:46:34 +08:00
|
|
|
mutex_init(&sbi->bitmap_lock);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
res = hfs_mdb_get(sb);
|
|
|
|
if (res) {
|
|
|
|
if (!silent)
|
2013-05-01 06:27:55 +08:00
|
|
|
pr_warn("can't find a HFS filesystem on dev %s\n",
|
2005-04-17 06:20:36 +08:00
|
|
|
hfs_mdb_name(sb));
|
|
|
|
res = -EINVAL;
|
2005-05-01 23:59:16 +08:00
|
|
|
goto bail;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* try to get the root inode */
|
2013-05-01 06:27:52 +08:00
|
|
|
res = hfs_find_init(HFS_SB(sb)->cat_tree, &fd);
|
|
|
|
if (res)
|
|
|
|
goto bail_no_root;
|
2005-04-17 06:20:36 +08:00
|
|
|
res = hfs_cat_find_brec(sb, HFS_ROOT_CNID, &fd);
|
2009-12-15 09:57:37 +08:00
|
|
|
if (!res) {
|
|
|
|
if (fd.entrylength > sizeof(rec) || fd.entrylength < 0) {
|
|
|
|
res = -EIO;
|
|
|
|
goto bail;
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, fd.entrylength);
|
2009-12-15 09:57:37 +08:00
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
if (res) {
|
|
|
|
hfs_find_exit(&fd);
|
|
|
|
goto bail_no_root;
|
|
|
|
}
|
2006-11-16 17:19:22 +08:00
|
|
|
res = -EINVAL;
|
2005-04-17 06:20:36 +08:00
|
|
|
root_inode = hfs_iget(sb, &fd.search_key->cat, &rec);
|
|
|
|
hfs_find_exit(&fd);
|
|
|
|
if (!root_inode)
|
|
|
|
goto bail_no_root;
|
|
|
|
|
2010-12-19 00:19:14 +08:00
|
|
|
sb->s_d_op = &hfs_dentry_operations;
|
2006-11-16 17:19:22 +08:00
|
|
|
res = -ENOMEM;
|
2012-01-09 11:15:13 +08:00
|
|
|
sb->s_root = d_make_root(root_inode);
|
2005-04-17 06:20:36 +08:00
|
|
|
if (!sb->s_root)
|
2012-01-09 11:15:13 +08:00
|
|
|
goto bail_no_root;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
/* everything's okay */
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
bail_no_root:
|
2013-05-01 06:27:55 +08:00
|
|
|
pr_err("get root inode failed\n");
|
2005-05-01 23:59:16 +08:00
|
|
|
bail:
|
2005-04-17 06:20:36 +08:00
|
|
|
hfs_mdb_put(sb);
|
|
|
|
return res;
|
|
|
|
}
|
|
|
|
|
2010-07-25 04:46:55 +08:00
|
|
|
static struct dentry *hfs_mount(struct file_system_type *fs_type,
|
|
|
|
int flags, const char *dev_name, void *data)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2010-07-25 04:46:55 +08:00
|
|
|
return mount_bdev(fs_type, flags, dev_name, data, hfs_fill_super);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static struct file_system_type hfs_fs_type = {
|
|
|
|
.owner = THIS_MODULE,
|
|
|
|
.name = "hfs",
|
2010-07-25 04:46:55 +08:00
|
|
|
.mount = hfs_mount,
|
2005-04-17 06:20:36 +08:00
|
|
|
.kill_sb = kill_block_super,
|
|
|
|
.fs_flags = FS_REQUIRES_DEV,
|
|
|
|
};
|
2013-03-03 11:39:14 +08:00
|
|
|
MODULE_ALIAS_FS("hfs");
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-26 10:45:34 +08:00
|
|
|
static void hfs_init_once(void *p)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
struct hfs_inode_info *i = p;
|
|
|
|
|
2007-05-17 13:10:57 +08:00
|
|
|
inode_init_once(&i->vfs_inode);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static int __init init_hfs_fs(void)
|
|
|
|
{
|
|
|
|
int err;
|
|
|
|
|
|
|
|
hfs_inode_cachep = kmem_cache_create("hfs_inode_cache",
|
2016-01-15 07:18:21 +08:00
|
|
|
sizeof(struct hfs_inode_info), 0,
|
|
|
|
SLAB_HWCACHE_ALIGN|SLAB_ACCOUNT, hfs_init_once);
|
2005-04-17 06:20:36 +08:00
|
|
|
if (!hfs_inode_cachep)
|
|
|
|
return -ENOMEM;
|
|
|
|
err = register_filesystem(&hfs_fs_type);
|
|
|
|
if (err)
|
|
|
|
kmem_cache_destroy(hfs_inode_cachep);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __exit exit_hfs_fs(void)
|
|
|
|
{
|
|
|
|
unregister_filesystem(&hfs_fs_type);
|
2012-09-26 09:33:07 +08:00
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|
|
|
|
|
|
/*
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|
|
|
* Make sure all delayed rcu free inodes are flushed before we
|
|
|
|
* destroy cache.
|
|
|
|
*/
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|
|
|
rcu_barrier();
|
2006-09-27 16:49:40 +08:00
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|
|
kmem_cache_destroy(hfs_inode_cachep);
|
2005-04-17 06:20:36 +08:00
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|
|
}
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|
|
module_init(init_hfs_fs)
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|
|
|
module_exit(exit_hfs_fs)
|