2005-04-17 06:20:36 +08:00
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/*
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* linux/fs/affs/inode.c
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*
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* (c) 1996 Hans-Joachim Widmaier - Rewritten
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*
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* (C) 1993 Ray Burr - Modified for Amiga FFS filesystem.
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*
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* (C) 1992 Eric Youngdale Modified for ISO 9660 filesystem.
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*
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* (C) 1991 Linus Torvalds - minix filesystem
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/statfs.h>
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#include <linux/parser.h>
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2006-09-24 23:13:19 +08:00
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#include <linux/magic.h>
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Detach sched.h from mm.h
First thing mm.h does is including sched.h solely for can_do_mlock() inline
function which has "current" dereference inside. By dealing with can_do_mlock()
mm.h can be detached from sched.h which is good. See below, why.
This patch
a) removes unconditional inclusion of sched.h from mm.h
b) makes can_do_mlock() normal function in mm/mlock.c
c) exports can_do_mlock() to not break compilation
d) adds sched.h inclusions back to files that were getting it indirectly.
e) adds less bloated headers to some files (asm/signal.h, jiffies.h) that were
getting them indirectly
Net result is:
a) mm.h users would get less code to open, read, preprocess, parse, ... if
they don't need sched.h
b) sched.h stops being dependency for significant number of files:
on x86_64 allmodconfig touching sched.h results in recompile of 4083 files,
after patch it's only 3744 (-8.3%).
Cross-compile tested on
all arm defconfigs, all mips defconfigs, all powerpc defconfigs,
alpha alpha-up
arm
i386 i386-up i386-defconfig i386-allnoconfig
ia64 ia64-up
m68k
mips
parisc parisc-up
powerpc powerpc-up
s390 s390-up
sparc sparc-up
sparc64 sparc64-up
um-x86_64
x86_64 x86_64-up x86_64-defconfig x86_64-allnoconfig
as well as my two usual configs.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-21 05:22:52 +08:00
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#include <linux/sched.h>
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2009-05-12 21:10:54 +08:00
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#include <linux/smp_lock.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 "affs.h"
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extern struct timezone sys_tz;
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2006-06-23 17:02:58 +08:00
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static int affs_statfs(struct dentry *dentry, struct kstatfs *buf);
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2005-04-17 06:20:36 +08:00
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static int affs_remount (struct super_block *sb, int *flags, char *data);
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2009-06-08 16:03:15 +08:00
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static void
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2010-07-05 20:15:00 +08:00
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affs_commit_super(struct super_block *sb, int wait, int clean)
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2009-06-08 16:03:15 +08:00
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{
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struct affs_sb_info *sbi = AFFS_SB(sb);
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struct buffer_head *bh = sbi->s_root_bh;
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struct affs_root_tail *tail = AFFS_ROOT_TAIL(sb, bh);
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tail->bm_flag = cpu_to_be32(clean);
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secs_to_datestamp(get_seconds(), &tail->disk_change);
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affs_fix_checksum(sb, bh);
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mark_buffer_dirty(bh);
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2010-07-05 20:15:00 +08:00
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if (wait)
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sync_dirty_buffer(bh);
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2009-06-08 16:03:15 +08:00
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}
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2005-04-17 06:20:36 +08:00
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static void
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affs_put_super(struct super_block *sb)
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{
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struct affs_sb_info *sbi = AFFS_SB(sb);
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pr_debug("AFFS: put_super()\n");
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push BKL down into ->put_super
Move BKL into ->put_super from the only caller. A couple of
filesystems had trivial enough ->put_super (only kfree and NULLing of
s_fs_info + stuff in there) to not get any locking: coda, cramfs, efs,
hugetlbfs, omfs, qnx4, shmem, all others got the full treatment. Most
of them probably don't need it, but I'd rather sort that out individually.
Preferably after all the other BKL pushdowns in that area.
[AV: original used to move lock_super() down as well; these changes are
removed since we don't do lock_super() at all in generic_shutdown_super()
now]
[AV: fuse, btrfs and xfs are known to need no damn BKL, exempt]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-05-05 21:40:36 +08:00
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lock_kernel();
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2010-07-05 20:15:00 +08:00
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if (!(sb->s_flags & MS_RDONLY) && sb->s_dirt)
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affs_commit_super(sb, 1, 1);
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2005-04-17 06:20:36 +08:00
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2005-11-07 17:01:34 +08:00
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kfree(sbi->s_prefix);
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2005-04-17 06:20:36 +08:00
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affs_free_bitmap(sb);
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affs_brelse(sbi->s_root_bh);
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kfree(sbi);
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sb->s_fs_info = NULL;
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push BKL down into ->put_super
Move BKL into ->put_super from the only caller. A couple of
filesystems had trivial enough ->put_super (only kfree and NULLing of
s_fs_info + stuff in there) to not get any locking: coda, cramfs, efs,
hugetlbfs, omfs, qnx4, shmem, all others got the full treatment. Most
of them probably don't need it, but I'd rather sort that out individually.
Preferably after all the other BKL pushdowns in that area.
[AV: original used to move lock_super() down as well; these changes are
removed since we don't do lock_super() at all in generic_shutdown_super()
now]
[AV: fuse, btrfs and xfs are known to need no damn BKL, exempt]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-05-05 21:40:36 +08:00
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unlock_kernel();
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2005-04-17 06:20:36 +08:00
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}
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static void
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affs_write_super(struct super_block *sb)
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{
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2009-05-12 05:35:03 +08:00
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lock_super(sb);
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2010-07-05 20:14:59 +08:00
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if (!(sb->s_flags & MS_RDONLY))
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2010-07-05 20:15:00 +08:00
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affs_commit_super(sb, 1, 2);
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2010-07-05 20:14:59 +08:00
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sb->s_dirt = 0;
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2009-05-12 05:35:03 +08:00
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unlock_super(sb);
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2005-04-17 06:20:36 +08:00
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2010-07-05 20:14:59 +08:00
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pr_debug("AFFS: write_super() at %lu, clean=2\n", get_seconds());
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2005-04-17 06:20:36 +08:00
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}
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2009-06-08 16:03:15 +08:00
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static int
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affs_sync_fs(struct super_block *sb, int wait)
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{
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lock_super(sb);
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2010-07-05 20:15:00 +08:00
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affs_commit_super(sb, wait, 2);
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2009-06-08 16:03:15 +08:00
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sb->s_dirt = 0;
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unlock_super(sb);
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return 0;
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}
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2006-12-07 12:33:20 +08:00
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static struct kmem_cache * affs_inode_cachep;
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2005-04-17 06:20:36 +08:00
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static struct inode *affs_alloc_inode(struct super_block *sb)
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{
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2008-04-29 23:02:20 +08:00
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struct affs_inode_info *i;
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i = kmem_cache_alloc(affs_inode_cachep, GFP_KERNEL);
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if (!i)
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2005-04-17 06:20:36 +08:00
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return NULL;
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2008-04-29 23:02:20 +08:00
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i->vfs_inode.i_version = 1;
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i->i_lc = NULL;
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i->i_ext_bh = NULL;
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i->i_pa_cnt = 0;
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return &i->vfs_inode;
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2005-04-17 06:20:36 +08:00
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}
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static void affs_destroy_inode(struct inode *inode)
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{
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kmem_cache_free(affs_inode_cachep, AFFS_I(inode));
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}
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2008-07-26 10:45:34 +08:00
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static void init_once(void *foo)
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2005-04-17 06:20:36 +08:00
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{
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struct affs_inode_info *ei = (struct affs_inode_info *) foo;
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2007-05-17 13:10:57 +08:00
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init_MUTEX(&ei->i_link_lock);
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init_MUTEX(&ei->i_ext_lock);
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inode_init_once(&ei->vfs_inode);
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2005-04-17 06:20:36 +08:00
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}
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static int init_inodecache(void)
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{
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affs_inode_cachep = kmem_cache_create("affs_inode_cache",
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sizeof(struct affs_inode_info),
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2006-03-24 19:16:06 +08:00
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0, (SLAB_RECLAIM_ACCOUNT|
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SLAB_MEM_SPREAD),
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2007-07-20 09:11:58 +08:00
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init_once);
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2005-04-17 06:20:36 +08:00
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if (affs_inode_cachep == NULL)
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return -ENOMEM;
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return 0;
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}
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static void destroy_inodecache(void)
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{
|
2006-09-27 16:49:40 +08:00
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kmem_cache_destroy(affs_inode_cachep);
|
2005-04-17 06:20:36 +08:00
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}
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2007-02-12 16:55:41 +08:00
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static const struct super_operations affs_sops = {
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2005-04-17 06:20:36 +08:00
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.alloc_inode = affs_alloc_inode,
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.destroy_inode = affs_destroy_inode,
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.write_inode = affs_write_inode,
|
2010-06-06 22:16:41 +08:00
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.evict_inode = affs_evict_inode,
|
2005-04-17 06:20:36 +08:00
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.put_super = affs_put_super,
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.write_super = affs_write_super,
|
2009-06-08 16:03:15 +08:00
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.sync_fs = affs_sync_fs,
|
2005-04-17 06:20:36 +08:00
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.statfs = affs_statfs,
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.remount_fs = affs_remount,
|
2008-02-08 20:21:36 +08:00
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.show_options = generic_show_options,
|
2005-04-17 06:20:36 +08:00
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};
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enum {
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Opt_bs, Opt_mode, Opt_mufs, Opt_prefix, Opt_protect,
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Opt_reserved, Opt_root, Opt_setgid, Opt_setuid,
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Opt_verbose, Opt_volume, Opt_ignore, Opt_err,
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};
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2008-10-13 17:46:57 +08:00
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static const match_table_t tokens = {
|
2005-04-17 06:20:36 +08:00
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|
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{Opt_bs, "bs=%u"},
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|
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{Opt_mode, "mode=%o"},
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{Opt_mufs, "mufs"},
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|
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{Opt_prefix, "prefix=%s"},
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|
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{Opt_protect, "protect"},
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|
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{Opt_reserved, "reserved=%u"},
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|
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{Opt_root, "root=%u"},
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|
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{Opt_setgid, "setgid=%u"},
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|
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{Opt_setuid, "setuid=%u"},
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|
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|
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{Opt_verbose, "verbose"},
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|
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|
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{Opt_volume, "volume=%s"},
|
|
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|
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{Opt_ignore, "grpquota"},
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|
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|
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{Opt_ignore, "noquota"},
|
|
|
|
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{Opt_ignore, "quota"},
|
|
|
|
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{Opt_ignore, "usrquota"},
|
|
|
|
|
{Opt_err, NULL},
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|
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|
|
};
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
parse_options(char *options, uid_t *uid, gid_t *gid, int *mode, int *reserved, s32 *root,
|
|
|
|
|
int *blocksize, char **prefix, char *volume, unsigned long *mount_opts)
|
|
|
|
|
{
|
|
|
|
|
char *p;
|
|
|
|
|
substring_t args[MAX_OPT_ARGS];
|
|
|
|
|
|
|
|
|
|
/* Fill in defaults */
|
|
|
|
|
|
2008-11-14 07:38:45 +08:00
|
|
|
*uid = current_uid();
|
|
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|
|
*gid = current_gid();
|
2005-04-17 06:20:36 +08:00
|
|
|
*reserved = 2;
|
|
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|
|
*root = -1;
|
|
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|
|
*blocksize = -1;
|
|
|
|
|
volume[0] = ':';
|
|
|
|
|
volume[1] = 0;
|
|
|
|
|
*mount_opts = 0;
|
|
|
|
|
if (!options)
|
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
|
|
while ((p = strsep(&options, ",")) != NULL) {
|
|
|
|
|
int token, n, option;
|
|
|
|
|
if (!*p)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
token = match_token(p, tokens, args);
|
|
|
|
|
switch (token) {
|
|
|
|
|
case Opt_bs:
|
|
|
|
|
if (match_int(&args[0], &n))
|
2010-01-24 13:06:22 +08:00
|
|
|
return 0;
|
2005-04-17 06:20:36 +08:00
|
|
|
if (n != 512 && n != 1024 && n != 2048
|
|
|
|
|
&& n != 4096) {
|
|
|
|
|
printk ("AFFS: Invalid blocksize (512, 1024, 2048, 4096 allowed)\n");
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
*blocksize = n;
|
|
|
|
|
break;
|
|
|
|
|
case Opt_mode:
|
|
|
|
|
if (match_octal(&args[0], &option))
|
2010-01-24 13:06:22 +08:00
|
|
|
return 0;
|
2005-04-17 06:20:36 +08:00
|
|
|
*mode = option & 0777;
|
|
|
|
|
*mount_opts |= SF_SETMODE;
|
|
|
|
|
break;
|
|
|
|
|
case Opt_mufs:
|
|
|
|
|
*mount_opts |= SF_MUFS;
|
|
|
|
|
break;
|
|
|
|
|
case Opt_prefix:
|
|
|
|
|
*prefix = match_strdup(&args[0]);
|
|
|
|
|
if (!*prefix)
|
|
|
|
|
return 0;
|
|
|
|
|
*mount_opts |= SF_PREFIX;
|
|
|
|
|
break;
|
|
|
|
|
case Opt_protect:
|
|
|
|
|
*mount_opts |= SF_IMMUTABLE;
|
|
|
|
|
break;
|
|
|
|
|
case Opt_reserved:
|
|
|
|
|
if (match_int(&args[0], reserved))
|
2010-01-24 13:06:22 +08:00
|
|
|
return 0;
|
2005-04-17 06:20:36 +08:00
|
|
|
break;
|
|
|
|
|
case Opt_root:
|
|
|
|
|
if (match_int(&args[0], root))
|
2010-01-24 13:06:22 +08:00
|
|
|
return 0;
|
2005-04-17 06:20:36 +08:00
|
|
|
break;
|
|
|
|
|
case Opt_setgid:
|
|
|
|
|
if (match_int(&args[0], &option))
|
2010-01-24 13:06:22 +08:00
|
|
|
return 0;
|
2005-04-17 06:20:36 +08:00
|
|
|
*gid = option;
|
|
|
|
|
*mount_opts |= SF_SETGID;
|
|
|
|
|
break;
|
|
|
|
|
case Opt_setuid:
|
|
|
|
|
if (match_int(&args[0], &option))
|
2010-01-24 13:06:22 +08:00
|
|
|
return 0;
|
2005-04-17 06:20:36 +08:00
|
|
|
*uid = option;
|
|
|
|
|
*mount_opts |= SF_SETUID;
|
|
|
|
|
break;
|
|
|
|
|
case Opt_verbose:
|
|
|
|
|
*mount_opts |= SF_VERBOSE;
|
|
|
|
|
break;
|
|
|
|
|
case Opt_volume: {
|
|
|
|
|
char *vol = match_strdup(&args[0]);
|
2008-04-29 15:59:06 +08:00
|
|
|
if (!vol)
|
|
|
|
|
return 0;
|
2005-04-17 06:20:36 +08:00
|
|
|
strlcpy(volume, vol, 32);
|
|
|
|
|
kfree(vol);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
case Opt_ignore:
|
|
|
|
|
/* Silently ignore the quota options */
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
printk("AFFS: Unrecognized mount option \"%s\" "
|
|
|
|
|
"or missing value\n", p);
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
return 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* This function definitely needs to be split up. Some fine day I'll
|
|
|
|
|
* hopefully have the guts to do so. Until then: sorry for the mess.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
static int affs_fill_super(struct super_block *sb, void *data, int silent)
|
|
|
|
|
{
|
|
|
|
|
struct affs_sb_info *sbi;
|
|
|
|
|
struct buffer_head *root_bh = NULL;
|
|
|
|
|
struct buffer_head *boot_bh;
|
|
|
|
|
struct inode *root_inode = NULL;
|
|
|
|
|
s32 root_block;
|
|
|
|
|
int size, blocksize;
|
|
|
|
|
u32 chksum;
|
|
|
|
|
int num_bm;
|
|
|
|
|
int i, j;
|
|
|
|
|
s32 key;
|
|
|
|
|
uid_t uid;
|
|
|
|
|
gid_t gid;
|
|
|
|
|
int reserved;
|
|
|
|
|
unsigned long mount_flags;
|
|
|
|
|
int tmp_flags; /* fix remount prototype... */
|
2006-06-25 20:49:08 +08:00
|
|
|
u8 sig[4];
|
2008-02-07 16:15:29 +08:00
|
|
|
int ret = -EINVAL;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-02-08 20:21:36 +08:00
|
|
|
save_mount_options(sb, data);
|
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
pr_debug("AFFS: read_super(%s)\n",data ? (const char *)data : "no options");
|
|
|
|
|
|
|
|
|
|
sb->s_magic = AFFS_SUPER_MAGIC;
|
|
|
|
|
sb->s_op = &affs_sops;
|
|
|
|
|
sb->s_flags |= MS_NODIRATIME;
|
|
|
|
|
|
2006-09-27 16:49:37 +08:00
|
|
|
sbi = kzalloc(sizeof(struct affs_sb_info), GFP_KERNEL);
|
2005-04-17 06:20:36 +08:00
|
|
|
if (!sbi)
|
|
|
|
|
return -ENOMEM;
|
|
|
|
|
sb->s_fs_info = sbi;
|
2008-07-26 10:44:51 +08:00
|
|
|
mutex_init(&sbi->s_bmlock);
|
2010-01-24 13:04:07 +08:00
|
|
|
spin_lock_init(&sbi->symlink_lock);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
|
if (!parse_options(data,&uid,&gid,&i,&reserved,&root_block,
|
|
|
|
|
&blocksize,&sbi->s_prefix,
|
|
|
|
|
sbi->s_volume, &mount_flags)) {
|
|
|
|
|
printk(KERN_ERR "AFFS: Error parsing options\n");
|
2010-01-24 12:38:27 +08:00
|
|
|
kfree(sbi->s_prefix);
|
|
|
|
|
kfree(sbi);
|
2005-04-17 06:20:36 +08:00
|
|
|
return -EINVAL;
|
|
|
|
|
}
|
|
|
|
|
/* N.B. after this point s_prefix must be released */
|
|
|
|
|
|
|
|
|
|
sbi->s_flags = mount_flags;
|
|
|
|
|
sbi->s_mode = i;
|
|
|
|
|
sbi->s_uid = uid;
|
|
|
|
|
sbi->s_gid = gid;
|
|
|
|
|
sbi->s_reserved= reserved;
|
|
|
|
|
|
|
|
|
|
/* Get the size of the device in 512-byte blocks.
|
|
|
|
|
* If we later see that the partition uses bigger
|
|
|
|
|
* blocks, we will have to change it.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
size = sb->s_bdev->bd_inode->i_size >> 9;
|
|
|
|
|
pr_debug("AFFS: initial blocksize=%d, #blocks=%d\n", 512, size);
|
|
|
|
|
|
|
|
|
|
affs_set_blocksize(sb, PAGE_SIZE);
|
|
|
|
|
/* Try to find root block. Its location depends on the block size. */
|
|
|
|
|
|
|
|
|
|
i = 512;
|
|
|
|
|
j = 4096;
|
|
|
|
|
if (blocksize > 0) {
|
|
|
|
|
i = j = blocksize;
|
|
|
|
|
size = size / (blocksize / 512);
|
|
|
|
|
}
|
|
|
|
|
for (blocksize = i, key = 0; blocksize <= j; blocksize <<= 1, size >>= 1) {
|
|
|
|
|
sbi->s_root_block = root_block;
|
|
|
|
|
if (root_block < 0)
|
|
|
|
|
sbi->s_root_block = (reserved + size - 1) / 2;
|
|
|
|
|
pr_debug("AFFS: setting blocksize to %d\n", blocksize);
|
|
|
|
|
affs_set_blocksize(sb, blocksize);
|
|
|
|
|
sbi->s_partition_size = size;
|
|
|
|
|
|
|
|
|
|
/* The root block location that was calculated above is not
|
|
|
|
|
* correct if the partition size is an odd number of 512-
|
|
|
|
|
* byte blocks, which will be rounded down to a number of
|
|
|
|
|
* 1024-byte blocks, and if there were an even number of
|
|
|
|
|
* reserved blocks. Ideally, all partition checkers should
|
|
|
|
|
* report the real number of blocks of the real blocksize,
|
|
|
|
|
* but since this just cannot be done, we have to try to
|
|
|
|
|
* find the root block anyways. In the above case, it is one
|
|
|
|
|
* block behind the calculated one. So we check this one, too.
|
|
|
|
|
*/
|
|
|
|
|
for (num_bm = 0; num_bm < 2; num_bm++) {
|
|
|
|
|
pr_debug("AFFS: Dev %s, trying root=%u, bs=%d, "
|
|
|
|
|
"size=%d, reserved=%d\n",
|
|
|
|
|
sb->s_id,
|
|
|
|
|
sbi->s_root_block + num_bm,
|
|
|
|
|
blocksize, size, reserved);
|
|
|
|
|
root_bh = affs_bread(sb, sbi->s_root_block + num_bm);
|
|
|
|
|
if (!root_bh)
|
|
|
|
|
continue;
|
|
|
|
|
if (!affs_checksum_block(sb, root_bh) &&
|
|
|
|
|
be32_to_cpu(AFFS_ROOT_HEAD(root_bh)->ptype) == T_SHORT &&
|
|
|
|
|
be32_to_cpu(AFFS_ROOT_TAIL(sb, root_bh)->stype) == ST_ROOT) {
|
|
|
|
|
sbi->s_hashsize = blocksize / 4 - 56;
|
|
|
|
|
sbi->s_root_block += num_bm;
|
|
|
|
|
key = 1;
|
|
|
|
|
goto got_root;
|
|
|
|
|
}
|
|
|
|
|
affs_brelse(root_bh);
|
|
|
|
|
root_bh = NULL;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
if (!silent)
|
|
|
|
|
printk(KERN_ERR "AFFS: No valid root block on device %s\n",
|
|
|
|
|
sb->s_id);
|
|
|
|
|
goto out_error;
|
|
|
|
|
|
|
|
|
|
/* N.B. after this point bh must be released */
|
|
|
|
|
got_root:
|
|
|
|
|
root_block = sbi->s_root_block;
|
|
|
|
|
|
|
|
|
|
/* Find out which kind of FS we have */
|
|
|
|
|
boot_bh = sb_bread(sb, 0);
|
|
|
|
|
if (!boot_bh) {
|
|
|
|
|
printk(KERN_ERR "AFFS: Cannot read boot block\n");
|
|
|
|
|
goto out_error;
|
|
|
|
|
}
|
2006-06-25 20:49:08 +08:00
|
|
|
memcpy(sig, boot_bh->b_data, 4);
|
2005-04-17 06:20:36 +08:00
|
|
|
brelse(boot_bh);
|
2006-06-25 20:49:08 +08:00
|
|
|
chksum = be32_to_cpu(*(__be32 *)sig);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
|
/* Dircache filesystems are compatible with non-dircache ones
|
|
|
|
|
* when reading. As long as they aren't supported, writing is
|
|
|
|
|
* not recommended.
|
|
|
|
|
*/
|
|
|
|
|
if ((chksum == FS_DCFFS || chksum == MUFS_DCFFS || chksum == FS_DCOFS
|
|
|
|
|
|| chksum == MUFS_DCOFS) && !(sb->s_flags & MS_RDONLY)) {
|
|
|
|
|
printk(KERN_NOTICE "AFFS: Dircache FS - mounting %s read only\n",
|
|
|
|
|
sb->s_id);
|
|
|
|
|
sb->s_flags |= MS_RDONLY;
|
|
|
|
|
}
|
|
|
|
|
switch (chksum) {
|
|
|
|
|
case MUFS_FS:
|
|
|
|
|
case MUFS_INTLFFS:
|
|
|
|
|
case MUFS_DCFFS:
|
|
|
|
|
sbi->s_flags |= SF_MUFS;
|
|
|
|
|
/* fall thru */
|
|
|
|
|
case FS_INTLFFS:
|
|
|
|
|
case FS_DCFFS:
|
|
|
|
|
sbi->s_flags |= SF_INTL;
|
|
|
|
|
break;
|
|
|
|
|
case MUFS_FFS:
|
|
|
|
|
sbi->s_flags |= SF_MUFS;
|
|
|
|
|
break;
|
|
|
|
|
case FS_FFS:
|
|
|
|
|
break;
|
|
|
|
|
case MUFS_OFS:
|
|
|
|
|
sbi->s_flags |= SF_MUFS;
|
|
|
|
|
/* fall thru */
|
|
|
|
|
case FS_OFS:
|
|
|
|
|
sbi->s_flags |= SF_OFS;
|
|
|
|
|
sb->s_flags |= MS_NOEXEC;
|
|
|
|
|
break;
|
|
|
|
|
case MUFS_DCOFS:
|
|
|
|
|
case MUFS_INTLOFS:
|
|
|
|
|
sbi->s_flags |= SF_MUFS;
|
|
|
|
|
case FS_DCOFS:
|
|
|
|
|
case FS_INTLOFS:
|
|
|
|
|
sbi->s_flags |= SF_INTL | SF_OFS;
|
|
|
|
|
sb->s_flags |= MS_NOEXEC;
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
printk(KERN_ERR "AFFS: Unknown filesystem on device %s: %08X\n",
|
|
|
|
|
sb->s_id, chksum);
|
|
|
|
|
goto out_error;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (mount_flags & SF_VERBOSE) {
|
2006-06-25 20:49:08 +08:00
|
|
|
u8 len = AFFS_ROOT_TAIL(sb, root_bh)->disk_name[0];
|
|
|
|
|
printk(KERN_NOTICE "AFFS: Mounting volume \"%.*s\": Type=%.3s\\%c, Blocksize=%d\n",
|
|
|
|
|
len > 31 ? 31 : len,
|
2005-04-17 06:20:36 +08:00
|
|
|
AFFS_ROOT_TAIL(sb, root_bh)->disk_name + 1,
|
2006-06-25 20:49:08 +08:00
|
|
|
sig, sig[3] + '0', blocksize);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
sb->s_flags |= MS_NODEV | MS_NOSUID;
|
|
|
|
|
|
|
|
|
|
sbi->s_data_blksize = sb->s_blocksize;
|
|
|
|
|
if (sbi->s_flags & SF_OFS)
|
|
|
|
|
sbi->s_data_blksize -= 24;
|
|
|
|
|
|
|
|
|
|
/* Keep super block in cache */
|
|
|
|
|
sbi->s_root_bh = root_bh;
|
|
|
|
|
/* N.B. after this point s_root_bh must be released */
|
|
|
|
|
|
|
|
|
|
tmp_flags = sb->s_flags;
|
|
|
|
|
if (affs_init_bitmap(sb, &tmp_flags))
|
|
|
|
|
goto out_error;
|
|
|
|
|
sb->s_flags = tmp_flags;
|
|
|
|
|
|
|
|
|
|
/* set up enough so that it can read an inode */
|
|
|
|
|
|
2008-02-07 16:15:29 +08:00
|
|
|
root_inode = affs_iget(sb, root_block);
|
|
|
|
|
if (IS_ERR(root_inode)) {
|
|
|
|
|
ret = PTR_ERR(root_inode);
|
|
|
|
|
goto out_error_noinode;
|
|
|
|
|
}
|
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
sb->s_root = d_alloc_root(root_inode);
|
|
|
|
|
if (!sb->s_root) {
|
|
|
|
|
printk(KERN_ERR "AFFS: Get root inode failed\n");
|
|
|
|
|
goto out_error;
|
|
|
|
|
}
|
|
|
|
|
sb->s_root->d_op = &affs_dentry_operations;
|
|
|
|
|
|
|
|
|
|
pr_debug("AFFS: s_flags=%lX\n",sb->s_flags);
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Begin the cascaded cleanup ...
|
|
|
|
|
*/
|
|
|
|
|
out_error:
|
|
|
|
|
if (root_inode)
|
|
|
|
|
iput(root_inode);
|
2008-02-07 16:15:29 +08:00
|
|
|
out_error_noinode:
|
2005-11-07 17:01:34 +08:00
|
|
|
kfree(sbi->s_bitmap);
|
2005-04-17 06:20:36 +08:00
|
|
|
affs_brelse(root_bh);
|
2005-11-07 17:01:34 +08:00
|
|
|
kfree(sbi->s_prefix);
|
2005-04-17 06:20:36 +08:00
|
|
|
kfree(sbi);
|
|
|
|
|
sb->s_fs_info = NULL;
|
2008-02-07 16:15:29 +08:00
|
|
|
return ret;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
affs_remount(struct super_block *sb, int *flags, char *data)
|
|
|
|
|
{
|
|
|
|
|
struct affs_sb_info *sbi = AFFS_SB(sb);
|
|
|
|
|
int blocksize;
|
|
|
|
|
uid_t uid;
|
|
|
|
|
gid_t gid;
|
|
|
|
|
int mode;
|
|
|
|
|
int reserved;
|
|
|
|
|
int root_block;
|
|
|
|
|
unsigned long mount_flags;
|
|
|
|
|
int res = 0;
|
2008-02-08 20:21:36 +08:00
|
|
|
char *new_opts = kstrdup(data, GFP_KERNEL);
|
2010-01-24 13:04:07 +08:00
|
|
|
char volume[32];
|
|
|
|
|
char *prefix = NULL;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
|
pr_debug("AFFS: remount(flags=0x%x,opts=\"%s\")\n",*flags,data);
|
|
|
|
|
|
|
|
|
|
*flags |= MS_NODIRATIME;
|
|
|
|
|
|
2010-01-24 13:04:07 +08:00
|
|
|
memcpy(volume, sbi->s_volume, 32);
|
2008-02-08 20:21:36 +08:00
|
|
|
if (!parse_options(data, &uid, &gid, &mode, &reserved, &root_block,
|
2010-01-24 13:04:07 +08:00
|
|
|
&blocksize, &prefix, volume,
|
2008-02-08 20:21:36 +08:00
|
|
|
&mount_flags)) {
|
2010-01-24 13:04:07 +08:00
|
|
|
kfree(prefix);
|
2008-02-08 20:21:36 +08:00
|
|
|
kfree(new_opts);
|
2005-04-17 06:20:36 +08:00
|
|
|
return -EINVAL;
|
2008-02-08 20:21:36 +08:00
|
|
|
}
|
2009-05-12 21:10:54 +08:00
|
|
|
lock_kernel();
|
2009-05-09 04:05:57 +08:00
|
|
|
replace_mount_options(sb, new_opts);
|
2008-02-08 20:21:36 +08:00
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
sbi->s_flags = mount_flags;
|
|
|
|
|
sbi->s_mode = mode;
|
|
|
|
|
sbi->s_uid = uid;
|
|
|
|
|
sbi->s_gid = gid;
|
2010-01-24 13:04:07 +08:00
|
|
|
/* protect against readers */
|
|
|
|
|
spin_lock(&sbi->symlink_lock);
|
|
|
|
|
if (prefix) {
|
|
|
|
|
kfree(sbi->s_prefix);
|
|
|
|
|
sbi->s_prefix = prefix;
|
|
|
|
|
}
|
|
|
|
|
memcpy(sbi->s_volume, volume, 32);
|
|
|
|
|
spin_unlock(&sbi->symlink_lock);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2009-05-12 21:10:54 +08:00
|
|
|
if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
|
|
|
|
|
unlock_kernel();
|
2005-04-17 06:20:36 +08:00
|
|
|
return 0;
|
2009-05-12 21:10:54 +08:00
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
if (*flags & MS_RDONLY) {
|
2010-07-05 20:14:59 +08:00
|
|
|
affs_write_super(sb);
|
2005-04-17 06:20:36 +08:00
|
|
|
affs_free_bitmap(sb);
|
|
|
|
|
} else
|
|
|
|
|
res = affs_init_bitmap(sb, flags);
|
|
|
|
|
|
2009-05-12 21:10:54 +08:00
|
|
|
unlock_kernel();
|
2005-04-17 06:20:36 +08:00
|
|
|
return res;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int
|
2006-06-23 17:02:58 +08:00
|
|
|
affs_statfs(struct dentry *dentry, struct kstatfs *buf)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2006-06-23 17:02:58 +08:00
|
|
|
struct super_block *sb = dentry->d_sb;
|
2005-04-17 06:20:36 +08:00
|
|
|
int free;
|
2009-04-03 07:59:32 +08:00
|
|
|
u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
|
pr_debug("AFFS: statfs() partsize=%d, reserved=%d\n",AFFS_SB(sb)->s_partition_size,
|
|
|
|
|
AFFS_SB(sb)->s_reserved);
|
|
|
|
|
|
|
|
|
|
free = affs_count_free_blocks(sb);
|
|
|
|
|
buf->f_type = AFFS_SUPER_MAGIC;
|
|
|
|
|
buf->f_bsize = sb->s_blocksize;
|
|
|
|
|
buf->f_blocks = AFFS_SB(sb)->s_partition_size - AFFS_SB(sb)->s_reserved;
|
|
|
|
|
buf->f_bfree = free;
|
|
|
|
|
buf->f_bavail = free;
|
2009-04-03 07:59:32 +08:00
|
|
|
buf->f_fsid.val[0] = (u32)id;
|
|
|
|
|
buf->f_fsid.val[1] = (u32)(id >> 32);
|
|
|
|
|
buf->f_namelen = 30;
|
2005-04-17 06:20:36 +08:00
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
[PATCH] VFS: Permit filesystem to override root dentry on mount
Extend the get_sb() filesystem operation to take an extra argument that
permits the VFS to pass in the target vfsmount that defines the mountpoint.
The filesystem is then required to manually set the superblock and root dentry
pointers. For most filesystems, this should be done with simple_set_mnt()
which will set the superblock pointer and then set the root dentry to the
superblock's s_root (as per the old default behaviour).
The get_sb() op now returns an integer as there's now no need to return the
superblock pointer.
This patch permits a superblock to be implicitly shared amongst several mount
points, such as can be done with NFS to avoid potential inode aliasing. In
such a case, simple_set_mnt() would not be called, and instead the mnt_root
and mnt_sb would be set directly.
The patch also makes the following changes:
(*) the get_sb_*() convenience functions in the core kernel now take a vfsmount
pointer argument and return an integer, so most filesystems have to change
very little.
(*) If one of the convenience function is not used, then get_sb() should
normally call simple_set_mnt() to instantiate the vfsmount. This will
always return 0, and so can be tail-called from get_sb().
(*) generic_shutdown_super() now calls shrink_dcache_sb() to clean up the
dcache upon superblock destruction rather than shrink_dcache_anon().
This is required because the superblock may now have multiple trees that
aren't actually bound to s_root, but that still need to be cleaned up. The
currently called functions assume that the whole tree is rooted at s_root,
and that anonymous dentries are not the roots of trees which results in
dentries being left unculled.
However, with the way NFS superblock sharing are currently set to be
implemented, these assumptions are violated: the root of the filesystem is
simply a dummy dentry and inode (the real inode for '/' may well be
inaccessible), and all the vfsmounts are rooted on anonymous[*] dentries
with child trees.
[*] Anonymous until discovered from another tree.
(*) The documentation has been adjusted, including the additional bit of
changing ext2_* into foo_* in the documentation.
[akpm@osdl.org: convert ipath_fs, do other stuff]
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: Nathan Scott <nathans@sgi.com>
Cc: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-23 17:02:57 +08:00
|
|
|
static int affs_get_sb(struct file_system_type *fs_type,
|
|
|
|
|
int flags, const char *dev_name, void *data, struct vfsmount *mnt)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
[PATCH] VFS: Permit filesystem to override root dentry on mount
Extend the get_sb() filesystem operation to take an extra argument that
permits the VFS to pass in the target vfsmount that defines the mountpoint.
The filesystem is then required to manually set the superblock and root dentry
pointers. For most filesystems, this should be done with simple_set_mnt()
which will set the superblock pointer and then set the root dentry to the
superblock's s_root (as per the old default behaviour).
The get_sb() op now returns an integer as there's now no need to return the
superblock pointer.
This patch permits a superblock to be implicitly shared amongst several mount
points, such as can be done with NFS to avoid potential inode aliasing. In
such a case, simple_set_mnt() would not be called, and instead the mnt_root
and mnt_sb would be set directly.
The patch also makes the following changes:
(*) the get_sb_*() convenience functions in the core kernel now take a vfsmount
pointer argument and return an integer, so most filesystems have to change
very little.
(*) If one of the convenience function is not used, then get_sb() should
normally call simple_set_mnt() to instantiate the vfsmount. This will
always return 0, and so can be tail-called from get_sb().
(*) generic_shutdown_super() now calls shrink_dcache_sb() to clean up the
dcache upon superblock destruction rather than shrink_dcache_anon().
This is required because the superblock may now have multiple trees that
aren't actually bound to s_root, but that still need to be cleaned up. The
currently called functions assume that the whole tree is rooted at s_root,
and that anonymous dentries are not the roots of trees which results in
dentries being left unculled.
However, with the way NFS superblock sharing are currently set to be
implemented, these assumptions are violated: the root of the filesystem is
simply a dummy dentry and inode (the real inode for '/' may well be
inaccessible), and all the vfsmounts are rooted on anonymous[*] dentries
with child trees.
[*] Anonymous until discovered from another tree.
(*) The documentation has been adjusted, including the additional bit of
changing ext2_* into foo_* in the documentation.
[akpm@osdl.org: convert ipath_fs, do other stuff]
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: Nathan Scott <nathans@sgi.com>
Cc: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-23 17:02:57 +08:00
|
|
|
return get_sb_bdev(fs_type, flags, dev_name, data, affs_fill_super,
|
|
|
|
|
mnt);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static struct file_system_type affs_fs_type = {
|
|
|
|
|
.owner = THIS_MODULE,
|
|
|
|
|
.name = "affs",
|
|
|
|
|
.get_sb = affs_get_sb,
|
|
|
|
|
.kill_sb = kill_block_super,
|
|
|
|
|
.fs_flags = FS_REQUIRES_DEV,
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
static int __init init_affs_fs(void)
|
|
|
|
|
{
|
|
|
|
|
int err = init_inodecache();
|
|
|
|
|
if (err)
|
|
|
|
|
goto out1;
|
|
|
|
|
err = register_filesystem(&affs_fs_type);
|
|
|
|
|
if (err)
|
|
|
|
|
goto out;
|
|
|
|
|
return 0;
|
|
|
|
|
out:
|
|
|
|
|
destroy_inodecache();
|
|
|
|
|
out1:
|
|
|
|
|
return err;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void __exit exit_affs_fs(void)
|
|
|
|
|
{
|
|
|
|
|
unregister_filesystem(&affs_fs_type);
|
|
|
|
|
destroy_inodecache();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
MODULE_DESCRIPTION("Amiga filesystem support for Linux");
|
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
|
|
|
|
|
|
module_init(init_affs_fs)
|
|
|
|
|
module_exit(exit_affs_fs)
|
