2007-04-26 15:49:28 -07:00
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/* AFS superblock handling
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*
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2007-04-26 15:55:03 -07:00
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* Copyright (c) 2002, 2007 Red Hat, Inc. All rights reserved.
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2005-04-16 15:20:36 -07:00
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*
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* This software may be freely redistributed under the terms of the
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* GNU General Public License.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* Authors: David Howells <dhowells@redhat.com>
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2008-06-05 22:46:18 -07:00
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* David Woodhouse <dwmw2@infradead.org>
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2005-04-16 15:20:36 -07:00
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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2010-08-11 01:38:04 -07:00
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#include <linux/mount.h>
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2005-04-16 15:20:36 -07:00
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/fs.h>
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#include <linux/pagemap.h>
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2007-05-03 03:11:29 -07:00
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#include <linux/parser.h>
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2007-05-10 22:22:20 -07:00
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#include <linux/statfs.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>
2007-05-20 14:22:52 -07:00
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#include <linux/sched.h>
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2005-04-16 15:20:36 -07:00
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#include "internal.h"
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#define AFS_FS_MAGIC 0x6B414653 /* 'kAFS' */
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2008-07-25 19:45:34 -07:00
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static void afs_i_init_once(void *foo);
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2010-07-26 03:16:21 -07:00
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static struct dentry *afs_mount(struct file_system_type *fs_type,
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int flags, const char *dev_name, void *data);
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2011-06-12 13:01:21 -07:00
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static void afs_kill_super(struct super_block *sb);
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2005-04-16 15:20:36 -07:00
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static struct inode *afs_alloc_inode(struct super_block *sb);
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static void afs_destroy_inode(struct inode *inode);
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2007-05-10 22:22:20 -07:00
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static int afs_statfs(struct dentry *dentry, struct kstatfs *buf);
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2005-04-16 15:20:36 -07:00
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2006-06-09 06:34:16 -07:00
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struct file_system_type afs_fs_type = {
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2005-04-16 15:20:36 -07:00
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.owner = THIS_MODULE,
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.name = "afs",
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2010-07-26 03:16:21 -07:00
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.mount = afs_mount,
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2011-06-12 13:01:21 -07:00
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.kill_sb = afs_kill_super,
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2007-05-03 03:11:29 -07:00
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.fs_flags = 0,
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2005-04-16 15:20:36 -07:00
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};
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2007-02-12 01:55:41 -07:00
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static const struct super_operations afs_super_ops = {
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2007-05-10 22:22:20 -07:00
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.statfs = afs_statfs,
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2005-04-16 15:20:36 -07:00
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.alloc_inode = afs_alloc_inode,
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2010-08-11 01:38:04 -07:00
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.drop_inode = afs_drop_inode,
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2005-04-16 15:20:36 -07:00
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.destroy_inode = afs_destroy_inode,
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2010-06-07 11:34:48 -07:00
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.evict_inode = afs_evict_inode,
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2008-02-08 05:21:37 -07:00
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.show_options = generic_show_options,
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2005-04-16 15:20:36 -07:00
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};
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2006-12-06 21:33:20 -07:00
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static struct kmem_cache *afs_inode_cachep;
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2005-04-16 15:20:36 -07:00
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static atomic_t afs_count_active_inodes;
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2007-05-03 03:11:29 -07:00
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enum {
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afs_no_opt,
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afs_opt_cell,
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afs_opt_rwpath,
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afs_opt_vol,
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2010-08-11 01:38:04 -07:00
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afs_opt_autocell,
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2007-05-03 03:11:29 -07:00
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};
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2008-10-13 02:46:57 -07:00
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static const match_table_t afs_options_list = {
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2007-05-03 03:11:29 -07:00
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{ afs_opt_cell, "cell=%s" },
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{ afs_opt_rwpath, "rwpath" },
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{ afs_opt_vol, "vol=%s" },
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2010-08-11 01:38:04 -07:00
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{ afs_opt_autocell, "autocell" },
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2007-05-03 03:11:29 -07:00
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{ afs_no_opt, NULL },
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};
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2005-04-16 15:20:36 -07:00
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/*
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* initialise the filesystem
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*/
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int __init afs_fs_init(void)
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{
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int ret;
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_enter("");
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/* create ourselves an inode cache */
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atomic_set(&afs_count_active_inodes, 0);
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ret = -ENOMEM;
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afs_inode_cachep = kmem_cache_create("afs_inode_cache",
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sizeof(struct afs_vnode),
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0,
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SLAB_HWCACHE_ALIGN,
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2007-07-19 18:11:58 -07:00
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afs_i_init_once);
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2005-04-16 15:20:36 -07:00
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if (!afs_inode_cachep) {
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printk(KERN_NOTICE "kAFS: Failed to allocate inode cache\n");
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return ret;
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}
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/* now export our filesystem to lesser mortals */
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ret = register_filesystem(&afs_fs_type);
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if (ret < 0) {
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kmem_cache_destroy(afs_inode_cachep);
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2007-04-26 15:55:03 -07:00
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_leave(" = %d", ret);
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2005-04-16 15:20:36 -07:00
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return ret;
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}
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2007-04-26 15:55:03 -07:00
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_leave(" = 0");
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2005-04-16 15:20:36 -07:00
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return 0;
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2007-04-26 15:49:28 -07:00
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}
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2005-04-16 15:20:36 -07:00
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/*
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* clean up the filesystem
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*/
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void __exit afs_fs_exit(void)
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{
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2007-04-26 15:55:03 -07:00
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_enter("");
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afs_mntpt_kill_timer();
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2005-04-16 15:20:36 -07:00
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unregister_filesystem(&afs_fs_type);
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if (atomic_read(&afs_count_active_inodes) != 0) {
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printk("kAFS: %d active inode objects still present\n",
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atomic_read(&afs_count_active_inodes));
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BUG();
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}
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kmem_cache_destroy(afs_inode_cachep);
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2007-04-26 15:55:03 -07:00
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_leave("");
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2007-04-26 15:49:28 -07:00
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}
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2005-04-16 15:20:36 -07:00
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/*
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* parse the mount options
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* - this function has been shamelessly adapted from the ext3 fs which
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* shamelessly adapted it from the msdos fs
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*/
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2007-04-26 15:57:07 -07:00
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static int afs_parse_options(struct afs_mount_params *params,
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char *options, const char **devname)
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2005-04-16 15:20:36 -07:00
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{
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2007-04-26 15:55:03 -07:00
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struct afs_cell *cell;
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2007-05-03 03:11:29 -07:00
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substring_t args[MAX_OPT_ARGS];
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char *p;
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int token;
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2005-04-16 15:20:36 -07:00
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_enter("%s", options);
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options[PAGE_SIZE - 1] = 0;
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2007-05-03 03:11:29 -07:00
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while ((p = strsep(&options, ","))) {
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if (!*p)
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continue;
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2005-04-16 15:20:36 -07:00
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2007-05-03 03:11:29 -07:00
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token = match_token(p, afs_options_list, args);
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switch (token) {
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case afs_opt_cell:
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cell = afs_cell_lookup(args[0].from,
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2010-08-11 01:38:04 -07:00
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args[0].to - args[0].from,
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false);
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2007-04-26 15:55:03 -07:00
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if (IS_ERR(cell))
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return PTR_ERR(cell);
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2007-04-26 15:57:07 -07:00
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afs_put_cell(params->cell);
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params->cell = cell;
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2007-05-03 03:11:29 -07:00
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break;
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case afs_opt_rwpath:
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params->rwpath = 1;
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break;
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case afs_opt_vol:
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*devname = args[0].from;
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break;
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2010-08-11 01:38:04 -07:00
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case afs_opt_autocell:
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params->autocell = 1;
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break;
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2007-05-03 03:11:29 -07:00
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default:
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printk(KERN_ERR "kAFS:"
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" Unknown or invalid mount option: '%s'\n", p);
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return -EINVAL;
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2005-04-16 15:20:36 -07:00
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}
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}
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2007-05-03 03:11:29 -07:00
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_leave(" = 0");
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return 0;
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2007-04-26 15:49:28 -07:00
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}
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2005-04-16 15:20:36 -07:00
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2007-04-26 15:57:07 -07:00
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/*
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* parse a device name to get cell name, volume name, volume type and R/W
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* selector
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* - this can be one of the following:
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* "%[cell:]volume[.]" R/W volume
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* "#[cell:]volume[.]" R/O or R/W volume (rwpath=0),
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* or R/W (rwpath=1) volume
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* "%[cell:]volume.readonly" R/O volume
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* "#[cell:]volume.readonly" R/O volume
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* "%[cell:]volume.backup" Backup volume
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* "#[cell:]volume.backup" Backup volume
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*/
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static int afs_parse_device_name(struct afs_mount_params *params,
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const char *name)
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{
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struct afs_cell *cell;
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const char *cellname, *suffix;
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int cellnamesz;
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_enter(",%s", name);
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if (!name) {
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printk(KERN_ERR "kAFS: no volume name specified\n");
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return -EINVAL;
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}
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if ((name[0] != '%' && name[0] != '#') || !name[1]) {
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printk(KERN_ERR "kAFS: unparsable volume name\n");
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return -EINVAL;
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}
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/* determine the type of volume we're looking for */
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params->type = AFSVL_ROVOL;
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params->force = false;
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if (params->rwpath || name[0] == '%') {
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params->type = AFSVL_RWVOL;
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params->force = true;
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}
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name++;
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/* split the cell name out if there is one */
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params->volname = strchr(name, ':');
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if (params->volname) {
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cellname = name;
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cellnamesz = params->volname - name;
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params->volname++;
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} else {
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params->volname = name;
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cellname = NULL;
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cellnamesz = 0;
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}
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/* the volume type is further affected by a possible suffix */
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suffix = strrchr(params->volname, '.');
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if (suffix) {
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|
|
if (strcmp(suffix, ".readonly") == 0) {
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params->type = AFSVL_ROVOL;
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params->force = true;
|
|
|
|
} else if (strcmp(suffix, ".backup") == 0) {
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params->type = AFSVL_BACKVOL;
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params->force = true;
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|
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} else if (suffix[1] == 0) {
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|
|
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} else {
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suffix = NULL;
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}
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}
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params->volnamesz = suffix ?
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suffix - params->volname : strlen(params->volname);
|
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_debug("cell %*.*s [%p]",
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cellnamesz, cellnamesz, cellname ?: "", params->cell);
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/* lookup the cell record */
|
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|
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if (cellname || !params->cell) {
|
2010-08-11 01:38:04 -07:00
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cell = afs_cell_lookup(cellname, cellnamesz, true);
|
2007-04-26 15:57:07 -07:00
|
|
|
if (IS_ERR(cell)) {
|
2010-08-11 01:38:04 -07:00
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printk(KERN_ERR "kAFS: unable to lookup cell '%*.*s'\n",
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cellnamesz, cellnamesz, cellname ?: "");
|
2007-04-26 15:57:07 -07:00
|
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return PTR_ERR(cell);
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|
|
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}
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afs_put_cell(params->cell);
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params->cell = cell;
|
|
|
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}
|
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_debug("CELL:%s [%p] VOLUME:%*.*s SUFFIX:%s TYPE:%d%s",
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|
|
params->cell->name, params->cell,
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params->volnamesz, params->volnamesz, params->volname,
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|
suffix ?: "-", params->type, params->force ? " FORCE" : "");
|
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|
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return 0;
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|
|
|
}
|
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
/*
|
|
|
|
* check a superblock to see if it's the one we're looking for
|
|
|
|
*/
|
|
|
|
static int afs_test_super(struct super_block *sb, void *data)
|
|
|
|
{
|
2011-06-12 13:01:21 -07:00
|
|
|
struct afs_super_info *as1 = data;
|
2005-04-16 15:20:36 -07:00
|
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|
struct afs_super_info *as = sb->s_fs_info;
|
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|
2011-06-12 13:01:21 -07:00
|
|
|
return as->volume == as1->volume;
|
|
|
|
}
|
|
|
|
|
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|
|
static int afs_set_super(struct super_block *sb, void *data)
|
|
|
|
{
|
|
|
|
sb->s_fs_info = data;
|
|
|
|
return set_anon_super(sb, NULL);
|
2007-04-26 15:49:28 -07:00
|
|
|
}
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
/*
|
|
|
|
* fill in the superblock
|
|
|
|
*/
|
2011-06-12 13:01:21 -07:00
|
|
|
static int afs_fill_super(struct super_block *sb,
|
|
|
|
struct afs_mount_params *params)
|
2005-04-16 15:20:36 -07:00
|
|
|
{
|
2011-06-12 13:01:21 -07:00
|
|
|
struct afs_super_info *as = sb->s_fs_info;
|
2005-04-16 15:20:36 -07:00
|
|
|
struct afs_fid fid;
|
|
|
|
struct dentry *root = NULL;
|
|
|
|
struct inode *inode = NULL;
|
|
|
|
int ret;
|
|
|
|
|
2007-04-26 15:55:03 -07:00
|
|
|
_enter("");
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
/* fill in the superblock */
|
|
|
|
sb->s_blocksize = PAGE_CACHE_SIZE;
|
|
|
|
sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
|
|
|
|
sb->s_magic = AFS_FS_MAGIC;
|
|
|
|
sb->s_op = &afs_super_ops;
|
2010-04-22 02:58:18 -07:00
|
|
|
sb->s_bdi = &as->volume->bdi;
|
2011-06-13 16:38:44 -07:00
|
|
|
strlcpy(sb->s_id, as->volume->vlocation->vldb.name, sizeof(sb->s_id));
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
/* allocate the root inode and dentry */
|
|
|
|
fid.vid = as->volume->vid;
|
|
|
|
fid.vnode = 1;
|
|
|
|
fid.unique = 1;
|
2007-04-26 15:59:35 -07:00
|
|
|
inode = afs_iget(sb, params->key, &fid, NULL, NULL);
|
2007-04-26 15:55:03 -07:00
|
|
|
if (IS_ERR(inode))
|
2011-06-12 13:01:21 -07:00
|
|
|
return PTR_ERR(inode);
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2010-08-11 01:38:04 -07:00
|
|
|
if (params->autocell)
|
|
|
|
set_bit(AFS_VNODE_AUTOCELL, &AFS_FS_I(inode)->flags);
|
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
ret = -ENOMEM;
|
|
|
|
root = d_alloc_root(inode);
|
|
|
|
if (!root)
|
|
|
|
goto error;
|
|
|
|
|
2011-01-12 18:04:20 -07:00
|
|
|
sb->s_d_op = &afs_fs_dentry_operations;
|
2005-04-16 15:20:36 -07:00
|
|
|
sb->s_root = root;
|
|
|
|
|
2007-04-26 15:55:03 -07:00
|
|
|
_leave(" = 0");
|
2005-04-16 15:20:36 -07:00
|
|
|
return 0;
|
|
|
|
|
2007-04-26 15:49:28 -07:00
|
|
|
error:
|
2005-04-16 15:20:36 -07:00
|
|
|
iput(inode);
|
2007-04-26 15:55:03 -07:00
|
|
|
_leave(" = %d", ret);
|
2005-04-16 15:20:36 -07:00
|
|
|
return ret;
|
2007-04-26 15:49:28 -07:00
|
|
|
}
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
/*
|
|
|
|
* get an AFS superblock
|
|
|
|
*/
|
2010-07-26 03:16:21 -07:00
|
|
|
static struct dentry *afs_mount(struct file_system_type *fs_type,
|
|
|
|
int flags, const char *dev_name, void *options)
|
2005-04-16 15:20:36 -07:00
|
|
|
{
|
|
|
|
struct afs_mount_params params;
|
|
|
|
struct super_block *sb;
|
2007-04-26 15:55:03 -07:00
|
|
|
struct afs_volume *vol;
|
2007-04-26 15:57:07 -07:00
|
|
|
struct key *key;
|
2008-02-08 05:21:37 -07:00
|
|
|
char *new_opts = kstrdup(options, GFP_KERNEL);
|
2011-06-12 13:01:21 -07:00
|
|
|
struct afs_super_info *as;
|
2005-04-16 15:20:36 -07:00
|
|
|
int ret;
|
|
|
|
|
|
|
|
_enter(",,%s,%p", dev_name, options);
|
|
|
|
|
|
|
|
memset(¶ms, 0, sizeof(params));
|
|
|
|
|
2007-04-26 15:57:07 -07:00
|
|
|
/* parse the options and device name */
|
2005-04-16 15:20:36 -07:00
|
|
|
if (options) {
|
2007-04-26 15:57:07 -07:00
|
|
|
ret = afs_parse_options(¶ms, options, &dev_name);
|
2005-04-16 15:20:36 -07:00
|
|
|
if (ret < 0)
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
2007-04-26 15:57:07 -07:00
|
|
|
ret = afs_parse_device_name(¶ms, dev_name);
|
|
|
|
if (ret < 0)
|
|
|
|
goto error;
|
|
|
|
|
|
|
|
/* try and do the mount securely */
|
|
|
|
key = afs_request_key(params.cell);
|
|
|
|
if (IS_ERR(key)) {
|
|
|
|
_leave(" = %ld [key]", PTR_ERR(key));
|
|
|
|
ret = PTR_ERR(key);
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
params.key = key;
|
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
/* parse the device name */
|
2007-04-26 15:57:07 -07:00
|
|
|
vol = afs_volume_lookup(¶ms);
|
2007-04-26 15:55:03 -07:00
|
|
|
if (IS_ERR(vol)) {
|
|
|
|
ret = PTR_ERR(vol);
|
2005-04-16 15:20:36 -07:00
|
|
|
goto error;
|
2007-04-26 15:55:03 -07:00
|
|
|
}
|
2011-06-12 13:01:21 -07:00
|
|
|
|
|
|
|
/* allocate a superblock info record */
|
|
|
|
as = kzalloc(sizeof(struct afs_super_info), GFP_KERNEL);
|
|
|
|
if (!as) {
|
|
|
|
ret = -ENOMEM;
|
|
|
|
afs_put_volume(vol);
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
as->volume = vol;
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
/* allocate a deviceless superblock */
|
2011-06-12 13:01:21 -07:00
|
|
|
sb = sget(fs_type, afs_test_super, afs_set_super, as);
|
2007-04-26 15:55:03 -07:00
|
|
|
if (IS_ERR(sb)) {
|
|
|
|
ret = PTR_ERR(sb);
|
2011-06-12 13:01:21 -07:00
|
|
|
afs_put_volume(vol);
|
|
|
|
kfree(as);
|
2005-04-16 15:20:36 -07:00
|
|
|
goto error;
|
2007-04-26 15:55:03 -07:00
|
|
|
}
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2007-04-26 15:56:24 -07:00
|
|
|
if (!sb->s_root) {
|
|
|
|
/* initial superblock/root creation */
|
|
|
|
_debug("create");
|
|
|
|
sb->s_flags = flags;
|
|
|
|
ret = afs_fill_super(sb, ¶ms);
|
|
|
|
if (ret < 0) {
|
2009-05-05 22:34:22 -07:00
|
|
|
deactivate_locked_super(sb);
|
2007-04-26 15:56:24 -07:00
|
|
|
goto error;
|
|
|
|
}
|
2009-05-08 13:05:57 -07:00
|
|
|
save_mount_options(sb, new_opts);
|
2007-04-26 15:56:24 -07:00
|
|
|
sb->s_flags |= MS_ACTIVE;
|
|
|
|
} else {
|
|
|
|
_debug("reuse");
|
|
|
|
ASSERTCMP(sb->s_flags, &, MS_ACTIVE);
|
2011-06-12 13:01:21 -07:00
|
|
|
afs_put_volume(vol);
|
|
|
|
kfree(as);
|
2005-04-16 15:20:36 -07:00
|
|
|
}
|
|
|
|
|
2007-04-26 15:57:07 -07:00
|
|
|
afs_put_cell(params.cell);
|
2009-05-08 13:05:57 -07:00
|
|
|
kfree(new_opts);
|
2007-04-26 15:55:03 -07:00
|
|
|
_leave(" = 0 [%p]", sb);
|
2010-07-26 03:16:21 -07:00
|
|
|
return dget(sb->s_root);
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2007-04-26 15:49:28 -07:00
|
|
|
error:
|
2007-04-26 15:57:07 -07:00
|
|
|
afs_put_cell(params.cell);
|
|
|
|
key_put(params.key);
|
2008-02-08 05:21:37 -07:00
|
|
|
kfree(new_opts);
|
2005-04-16 15:20:36 -07:00
|
|
|
_leave(" = %d", ret);
|
2010-07-26 03:16:21 -07:00
|
|
|
return ERR_PTR(ret);
|
2007-04-26 15:49:28 -07:00
|
|
|
}
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2011-06-12 13:01:21 -07:00
|
|
|
static void afs_kill_super(struct super_block *sb)
|
2005-04-16 15:20:36 -07:00
|
|
|
{
|
|
|
|
struct afs_super_info *as = sb->s_fs_info;
|
2011-06-12 13:01:21 -07:00
|
|
|
kill_anon_super(sb);
|
2005-04-16 15:20:36 -07:00
|
|
|
afs_put_volume(as->volume);
|
2011-06-12 13:01:21 -07:00
|
|
|
kfree(as);
|
2007-04-26 15:49:28 -07:00
|
|
|
}
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
/*
|
|
|
|
* initialise an inode cache slab element prior to any use
|
|
|
|
*/
|
2008-07-25 19:45:34 -07:00
|
|
|
static void afs_i_init_once(void *_vnode)
|
2005-04-16 15:20:36 -07:00
|
|
|
{
|
2007-04-26 15:49:28 -07:00
|
|
|
struct afs_vnode *vnode = _vnode;
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2007-05-16 22:10:57 -07:00
|
|
|
memset(vnode, 0, sizeof(*vnode));
|
|
|
|
inode_init_once(&vnode->vfs_inode);
|
|
|
|
init_waitqueue_head(&vnode->update_waitq);
|
|
|
|
mutex_init(&vnode->permits_lock);
|
|
|
|
mutex_init(&vnode->validate_lock);
|
|
|
|
spin_lock_init(&vnode->writeback_lock);
|
|
|
|
spin_lock_init(&vnode->lock);
|
|
|
|
INIT_LIST_HEAD(&vnode->writebacks);
|
2007-07-15 23:40:12 -07:00
|
|
|
INIT_LIST_HEAD(&vnode->pending_locks);
|
|
|
|
INIT_LIST_HEAD(&vnode->granted_locks);
|
|
|
|
INIT_DELAYED_WORK(&vnode->lock_work, afs_lock_work);
|
2007-05-16 22:10:57 -07:00
|
|
|
INIT_WORK(&vnode->cb_broken_work, afs_broken_callback_work);
|
2007-04-26 15:49:28 -07:00
|
|
|
}
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
/*
|
|
|
|
* allocate an AFS inode struct from our slab cache
|
|
|
|
*/
|
|
|
|
static struct inode *afs_alloc_inode(struct super_block *sb)
|
|
|
|
{
|
|
|
|
struct afs_vnode *vnode;
|
|
|
|
|
2007-04-26 15:49:28 -07:00
|
|
|
vnode = kmem_cache_alloc(afs_inode_cachep, GFP_KERNEL);
|
2005-04-16 15:20:36 -07:00
|
|
|
if (!vnode)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
atomic_inc(&afs_count_active_inodes);
|
|
|
|
|
|
|
|
memset(&vnode->fid, 0, sizeof(vnode->fid));
|
|
|
|
memset(&vnode->status, 0, sizeof(vnode->status));
|
|
|
|
|
|
|
|
vnode->volume = NULL;
|
|
|
|
vnode->update_cnt = 0;
|
2007-04-26 15:59:35 -07:00
|
|
|
vnode->flags = 1 << AFS_VNODE_UNSET;
|
2007-04-26 15:55:03 -07:00
|
|
|
vnode->cb_promised = false;
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2007-05-10 22:22:20 -07:00
|
|
|
_leave(" = %p", &vnode->vfs_inode);
|
2005-04-16 15:20:36 -07:00
|
|
|
return &vnode->vfs_inode;
|
2007-04-26 15:49:28 -07:00
|
|
|
}
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2011-01-06 23:49:49 -07:00
|
|
|
static void afs_i_callback(struct rcu_head *head)
|
|
|
|
{
|
|
|
|
struct inode *inode = container_of(head, struct inode, i_rcu);
|
|
|
|
struct afs_vnode *vnode = AFS_FS_I(inode);
|
|
|
|
INIT_LIST_HEAD(&inode->i_dentry);
|
|
|
|
kmem_cache_free(afs_inode_cachep, vnode);
|
|
|
|
}
|
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
/*
|
|
|
|
* destroy an AFS inode struct
|
|
|
|
*/
|
|
|
|
static void afs_destroy_inode(struct inode *inode)
|
|
|
|
{
|
2007-04-26 15:55:03 -07:00
|
|
|
struct afs_vnode *vnode = AFS_FS_I(inode);
|
|
|
|
|
2007-05-10 22:22:20 -07:00
|
|
|
_enter("%p{%x:%u}", inode, vnode->fid.vid, vnode->fid.vnode);
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2007-04-26 15:55:03 -07:00
|
|
|
_debug("DESTROY INODE %p", inode);
|
|
|
|
|
|
|
|
ASSERTCMP(vnode->server, ==, NULL);
|
|
|
|
|
2011-01-06 23:49:49 -07:00
|
|
|
call_rcu(&inode->i_rcu, afs_i_callback);
|
2005-04-16 15:20:36 -07:00
|
|
|
atomic_dec(&afs_count_active_inodes);
|
2007-04-26 15:49:28 -07:00
|
|
|
}
|
2007-05-10 22:22:20 -07:00
|
|
|
|
|
|
|
/*
|
|
|
|
* return information about an AFS volume
|
|
|
|
*/
|
|
|
|
static int afs_statfs(struct dentry *dentry, struct kstatfs *buf)
|
|
|
|
{
|
|
|
|
struct afs_volume_status vs;
|
|
|
|
struct afs_vnode *vnode = AFS_FS_I(dentry->d_inode);
|
|
|
|
struct key *key;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
key = afs_request_key(vnode->volume->cell);
|
|
|
|
if (IS_ERR(key))
|
|
|
|
return PTR_ERR(key);
|
|
|
|
|
|
|
|
ret = afs_vnode_get_volume_status(vnode, key, &vs);
|
|
|
|
key_put(key);
|
|
|
|
if (ret < 0) {
|
|
|
|
_leave(" = %d", ret);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
buf->f_type = dentry->d_sb->s_magic;
|
|
|
|
buf->f_bsize = AFS_BLOCK_SIZE;
|
|
|
|
buf->f_namelen = AFSNAMEMAX - 1;
|
|
|
|
|
|
|
|
if (vs.max_quota == 0)
|
|
|
|
buf->f_blocks = vs.part_max_blocks;
|
|
|
|
else
|
|
|
|
buf->f_blocks = vs.max_quota;
|
|
|
|
buf->f_bavail = buf->f_bfree = buf->f_blocks - vs.blocks_in_use;
|
|
|
|
return 0;
|
|
|
|
}
|