2006-01-17 00:50:04 +08:00
|
|
|
/*
|
|
|
|
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
|
|
|
|
* Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
|
|
|
|
*
|
|
|
|
* This copyrighted material is made available to anyone wishing to use,
|
|
|
|
* modify, copy, or redistribute it subject to the terms and conditions
|
|
|
|
* of the GNU General Public License v.2.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/sched.h>
|
|
|
|
#include <linux/slab.h>
|
|
|
|
#include <linux/spinlock.h>
|
|
|
|
#include <linux/completion.h>
|
|
|
|
#include <linux/buffer_head.h>
|
|
|
|
#include <linux/posix_acl.h>
|
|
|
|
#include <linux/sort.h>
|
2006-02-28 06:23:27 +08:00
|
|
|
#include <linux/gfs2_ondisk.h>
|
2006-03-29 03:14:04 +08:00
|
|
|
#include <linux/crc32.h>
|
2006-01-17 00:50:04 +08:00
|
|
|
#include <asm/semaphore.h>
|
|
|
|
|
|
|
|
#include "gfs2.h"
|
2006-02-28 06:23:27 +08:00
|
|
|
#include "lm_interface.h"
|
|
|
|
#include "incore.h"
|
2006-01-17 00:50:04 +08:00
|
|
|
#include "acl.h"
|
|
|
|
#include "bmap.h"
|
|
|
|
#include "dir.h"
|
|
|
|
#include "eattr.h"
|
|
|
|
#include "glock.h"
|
|
|
|
#include "glops.h"
|
|
|
|
#include "inode.h"
|
|
|
|
#include "log.h"
|
|
|
|
#include "meta_io.h"
|
|
|
|
#include "ops_address.h"
|
|
|
|
#include "ops_file.h"
|
|
|
|
#include "ops_inode.h"
|
|
|
|
#include "quota.h"
|
|
|
|
#include "rgrp.h"
|
|
|
|
#include "trans.h"
|
|
|
|
#include "unlinked.h"
|
2006-02-28 06:23:27 +08:00
|
|
|
#include "util.h"
|
2006-01-17 00:50:04 +08:00
|
|
|
|
|
|
|
/**
|
|
|
|
* inode_attr_in - Copy attributes from the dinode into the VFS inode
|
|
|
|
* @ip: The GFS2 inode (with embedded disk inode data)
|
|
|
|
* @inode: The Linux VFS inode
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
static void inode_attr_in(struct gfs2_inode *ip, struct inode *inode)
|
|
|
|
{
|
|
|
|
inode->i_ino = ip->i_num.no_formal_ino;
|
|
|
|
|
|
|
|
switch (ip->i_di.di_mode & S_IFMT) {
|
|
|
|
case S_IFBLK:
|
|
|
|
case S_IFCHR:
|
|
|
|
inode->i_rdev = MKDEV(ip->i_di.di_major, ip->i_di.di_minor);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
inode->i_rdev = 0;
|
|
|
|
break;
|
|
|
|
};
|
|
|
|
|
|
|
|
inode->i_mode = ip->i_di.di_mode;
|
|
|
|
inode->i_nlink = ip->i_di.di_nlink;
|
|
|
|
inode->i_uid = ip->i_di.di_uid;
|
|
|
|
inode->i_gid = ip->i_di.di_gid;
|
|
|
|
i_size_write(inode, ip->i_di.di_size);
|
|
|
|
inode->i_atime.tv_sec = ip->i_di.di_atime;
|
|
|
|
inode->i_mtime.tv_sec = ip->i_di.di_mtime;
|
|
|
|
inode->i_ctime.tv_sec = ip->i_di.di_ctime;
|
|
|
|
inode->i_atime.tv_nsec = 0;
|
|
|
|
inode->i_mtime.tv_nsec = 0;
|
|
|
|
inode->i_ctime.tv_nsec = 0;
|
|
|
|
inode->i_blksize = PAGE_SIZE;
|
|
|
|
inode->i_blocks = ip->i_di.di_blocks <<
|
|
|
|
(ip->i_sbd->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
|
|
|
|
|
|
|
|
if (ip->i_di.di_flags & GFS2_DIF_IMMUTABLE)
|
|
|
|
inode->i_flags |= S_IMMUTABLE;
|
|
|
|
else
|
|
|
|
inode->i_flags &= ~S_IMMUTABLE;
|
|
|
|
|
|
|
|
if (ip->i_di.di_flags & GFS2_DIF_APPENDONLY)
|
|
|
|
inode->i_flags |= S_APPEND;
|
|
|
|
else
|
|
|
|
inode->i_flags &= ~S_APPEND;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* gfs2_inode_attr_in - Copy attributes from the dinode into the VFS inode
|
|
|
|
* @ip: The GFS2 inode (with embedded disk inode data)
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
void gfs2_inode_attr_in(struct gfs2_inode *ip)
|
|
|
|
{
|
|
|
|
struct inode *inode;
|
|
|
|
|
|
|
|
inode = gfs2_ip2v_lookup(ip);
|
|
|
|
if (inode) {
|
|
|
|
inode_attr_in(ip, inode);
|
|
|
|
iput(inode);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* gfs2_inode_attr_out - Copy attributes from VFS inode into the dinode
|
|
|
|
* @ip: The GFS2 inode
|
|
|
|
*
|
|
|
|
* Only copy out the attributes that we want the VFS layer
|
|
|
|
* to be able to modify.
|
|
|
|
*/
|
|
|
|
|
|
|
|
void gfs2_inode_attr_out(struct gfs2_inode *ip)
|
|
|
|
{
|
|
|
|
struct inode *inode = ip->i_vnode;
|
|
|
|
|
|
|
|
gfs2_assert_withdraw(ip->i_sbd,
|
|
|
|
(ip->i_di.di_mode & S_IFMT) == (inode->i_mode & S_IFMT));
|
|
|
|
ip->i_di.di_mode = inode->i_mode;
|
|
|
|
ip->i_di.di_uid = inode->i_uid;
|
|
|
|
ip->i_di.di_gid = inode->i_gid;
|
|
|
|
ip->i_di.di_atime = inode->i_atime.tv_sec;
|
|
|
|
ip->i_di.di_mtime = inode->i_mtime.tv_sec;
|
|
|
|
ip->i_di.di_ctime = inode->i_ctime.tv_sec;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* gfs2_ip2v_lookup - Get the struct inode for a struct gfs2_inode
|
|
|
|
* @ip: the struct gfs2_inode to get the struct inode for
|
|
|
|
*
|
|
|
|
* Returns: A VFS inode, or NULL if none
|
|
|
|
*/
|
|
|
|
|
|
|
|
struct inode *gfs2_ip2v_lookup(struct gfs2_inode *ip)
|
|
|
|
{
|
|
|
|
struct inode *inode = NULL;
|
|
|
|
|
|
|
|
gfs2_assert_warn(ip->i_sbd, test_bit(GIF_MIN_INIT, &ip->i_flags));
|
|
|
|
|
|
|
|
spin_lock(&ip->i_spin);
|
|
|
|
if (ip->i_vnode)
|
|
|
|
inode = igrab(ip->i_vnode);
|
|
|
|
spin_unlock(&ip->i_spin);
|
|
|
|
|
|
|
|
return inode;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* gfs2_ip2v - Get/Create a struct inode for a struct gfs2_inode
|
|
|
|
* @ip: the struct gfs2_inode to get the struct inode for
|
|
|
|
*
|
|
|
|
* Returns: A VFS inode, or NULL if no mem
|
|
|
|
*/
|
|
|
|
|
|
|
|
struct inode *gfs2_ip2v(struct gfs2_inode *ip)
|
|
|
|
{
|
|
|
|
struct inode *inode, *tmp;
|
|
|
|
|
|
|
|
inode = gfs2_ip2v_lookup(ip);
|
|
|
|
if (inode)
|
|
|
|
return inode;
|
|
|
|
|
|
|
|
tmp = new_inode(ip->i_sbd->sd_vfs);
|
|
|
|
if (!tmp)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
inode_attr_in(ip, tmp);
|
|
|
|
|
|
|
|
if (S_ISREG(ip->i_di.di_mode)) {
|
|
|
|
tmp->i_op = &gfs2_file_iops;
|
|
|
|
tmp->i_fop = &gfs2_file_fops;
|
|
|
|
tmp->i_mapping->a_ops = &gfs2_file_aops;
|
|
|
|
} else if (S_ISDIR(ip->i_di.di_mode)) {
|
|
|
|
tmp->i_op = &gfs2_dir_iops;
|
|
|
|
tmp->i_fop = &gfs2_dir_fops;
|
|
|
|
} else if (S_ISLNK(ip->i_di.di_mode)) {
|
|
|
|
tmp->i_op = &gfs2_symlink_iops;
|
|
|
|
} else {
|
|
|
|
tmp->i_op = &gfs2_dev_iops;
|
|
|
|
init_special_inode(tmp, tmp->i_mode, tmp->i_rdev);
|
|
|
|
}
|
|
|
|
|
2006-02-28 06:23:27 +08:00
|
|
|
tmp->u.generic_ip = NULL;
|
2006-01-17 00:50:04 +08:00
|
|
|
|
|
|
|
for (;;) {
|
|
|
|
spin_lock(&ip->i_spin);
|
|
|
|
if (!ip->i_vnode)
|
|
|
|
break;
|
|
|
|
inode = igrab(ip->i_vnode);
|
|
|
|
spin_unlock(&ip->i_spin);
|
|
|
|
|
|
|
|
if (inode) {
|
|
|
|
iput(tmp);
|
|
|
|
return inode;
|
|
|
|
}
|
|
|
|
yield();
|
|
|
|
}
|
|
|
|
|
|
|
|
inode = tmp;
|
|
|
|
|
|
|
|
gfs2_inode_hold(ip);
|
|
|
|
ip->i_vnode = inode;
|
2006-02-28 06:23:27 +08:00
|
|
|
inode->u.generic_ip = ip;
|
2006-01-17 00:50:04 +08:00
|
|
|
|
|
|
|
spin_unlock(&ip->i_spin);
|
|
|
|
|
|
|
|
insert_inode_hash(inode);
|
|
|
|
|
|
|
|
return inode;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int iget_test(struct inode *inode, void *opaque)
|
|
|
|
{
|
2006-02-28 06:23:27 +08:00
|
|
|
struct gfs2_inode *ip = inode->u.generic_ip;
|
2006-01-17 00:50:04 +08:00
|
|
|
struct gfs2_inum *inum = (struct gfs2_inum *)opaque;
|
|
|
|
|
|
|
|
if (ip && ip->i_num.no_addr == inum->no_addr)
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
struct inode *gfs2_iget(struct super_block *sb, struct gfs2_inum *inum)
|
|
|
|
{
|
|
|
|
return ilookup5(sb, (unsigned long)inum->no_formal_ino,
|
|
|
|
iget_test, inum);
|
|
|
|
}
|
|
|
|
|
|
|
|
void gfs2_inode_min_init(struct gfs2_inode *ip, unsigned int type)
|
|
|
|
{
|
|
|
|
if (!test_and_set_bit(GIF_MIN_INIT, &ip->i_flags)) {
|
|
|
|
ip->i_di.di_nlink = 1;
|
|
|
|
ip->i_di.di_mode = DT2IF(type);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* gfs2_inode_refresh - Refresh the incore copy of the dinode
|
|
|
|
* @ip: The GFS2 inode
|
|
|
|
*
|
|
|
|
* Returns: errno
|
|
|
|
*/
|
|
|
|
|
|
|
|
int gfs2_inode_refresh(struct gfs2_inode *ip)
|
|
|
|
{
|
|
|
|
struct buffer_head *dibh;
|
|
|
|
int error;
|
|
|
|
|
|
|
|
error = gfs2_meta_inode_buffer(ip, &dibh);
|
|
|
|
if (error)
|
|
|
|
return error;
|
|
|
|
|
|
|
|
if (gfs2_metatype_check(ip->i_sbd, dibh, GFS2_METATYPE_DI)) {
|
|
|
|
brelse(dibh);
|
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
|
|
|
|
gfs2_dinode_in(&ip->i_di, dibh->b_data);
|
|
|
|
set_bit(GIF_MIN_INIT, &ip->i_flags);
|
|
|
|
|
|
|
|
brelse(dibh);
|
|
|
|
|
|
|
|
if (ip->i_num.no_addr != ip->i_di.di_num.no_addr) {
|
|
|
|
if (gfs2_consist_inode(ip))
|
|
|
|
gfs2_dinode_print(&ip->i_di);
|
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
if (ip->i_num.no_formal_ino != ip->i_di.di_num.no_formal_ino)
|
|
|
|
return -ESTALE;
|
|
|
|
|
|
|
|
ip->i_vn = ip->i_gl->gl_vn;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* inode_create - create a struct gfs2_inode
|
|
|
|
* @i_gl: The glock covering the inode
|
|
|
|
* @inum: The inode number
|
|
|
|
* @io_gl: the iopen glock to acquire/hold (using holder in new gfs2_inode)
|
|
|
|
* @io_state: the state the iopen glock should be acquired in
|
|
|
|
* @ipp: pointer to put the returned inode in
|
|
|
|
*
|
|
|
|
* Returns: errno
|
|
|
|
*/
|
|
|
|
|
2006-03-02 04:31:02 +08:00
|
|
|
static int inode_create(struct gfs2_glock *i_gl, const struct gfs2_inum *inum,
|
2006-01-17 00:50:04 +08:00
|
|
|
struct gfs2_glock *io_gl, unsigned int io_state,
|
|
|
|
struct gfs2_inode **ipp)
|
|
|
|
{
|
|
|
|
struct gfs2_sbd *sdp = i_gl->gl_sbd;
|
|
|
|
struct gfs2_inode *ip;
|
|
|
|
int error = 0;
|
|
|
|
|
|
|
|
ip = kmem_cache_alloc(gfs2_inode_cachep, GFP_KERNEL);
|
|
|
|
if (!ip)
|
|
|
|
return -ENOMEM;
|
|
|
|
memset(ip, 0, sizeof(struct gfs2_inode));
|
|
|
|
|
|
|
|
ip->i_num = *inum;
|
|
|
|
|
|
|
|
atomic_set(&ip->i_count, 1);
|
|
|
|
|
|
|
|
ip->i_vn = i_gl->gl_vn - 1;
|
|
|
|
|
|
|
|
ip->i_gl = i_gl;
|
|
|
|
ip->i_sbd = sdp;
|
|
|
|
|
|
|
|
spin_lock_init(&ip->i_spin);
|
|
|
|
init_rwsem(&ip->i_rw_mutex);
|
|
|
|
|
|
|
|
ip->i_greedy = gfs2_tune_get(sdp, gt_greedy_default);
|
|
|
|
|
|
|
|
error = gfs2_glock_nq_init(io_gl,
|
|
|
|
io_state, GL_LOCAL_EXCL | GL_EXACT,
|
|
|
|
&ip->i_iopen_gh);
|
|
|
|
if (error)
|
|
|
|
goto fail;
|
|
|
|
ip->i_iopen_gh.gh_owner = NULL;
|
|
|
|
|
|
|
|
spin_lock(&io_gl->gl_spin);
|
|
|
|
gfs2_glock_hold(i_gl);
|
2006-02-28 06:23:27 +08:00
|
|
|
io_gl->gl_object = i_gl;
|
2006-01-17 00:50:04 +08:00
|
|
|
spin_unlock(&io_gl->gl_spin);
|
|
|
|
|
|
|
|
gfs2_glock_hold(i_gl);
|
2006-02-28 06:23:27 +08:00
|
|
|
i_gl->gl_object = ip;
|
2006-01-17 00:50:04 +08:00
|
|
|
|
|
|
|
atomic_inc(&sdp->sd_inode_count);
|
|
|
|
|
|
|
|
*ipp = ip;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
fail:
|
|
|
|
gfs2_meta_cache_flush(ip);
|
|
|
|
kmem_cache_free(gfs2_inode_cachep, ip);
|
|
|
|
*ipp = NULL;
|
|
|
|
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* gfs2_inode_get - Create or get a reference on an inode
|
|
|
|
* @i_gl: The glock covering the inode
|
|
|
|
* @inum: The inode number
|
|
|
|
* @create:
|
|
|
|
* @ipp: pointer to put the returned inode in
|
|
|
|
*
|
|
|
|
* Returns: errno
|
|
|
|
*/
|
|
|
|
|
2006-03-02 04:31:02 +08:00
|
|
|
int gfs2_inode_get(struct gfs2_glock *i_gl, const struct gfs2_inum *inum,
|
|
|
|
int create, struct gfs2_inode **ipp)
|
2006-01-17 00:50:04 +08:00
|
|
|
{
|
|
|
|
struct gfs2_sbd *sdp = i_gl->gl_sbd;
|
|
|
|
struct gfs2_glock *io_gl;
|
|
|
|
int error = 0;
|
|
|
|
|
|
|
|
gfs2_glmutex_lock(i_gl);
|
|
|
|
|
2006-02-28 06:23:27 +08:00
|
|
|
*ipp = i_gl->gl_object;
|
2006-01-17 00:50:04 +08:00
|
|
|
if (*ipp) {
|
|
|
|
error = -ESTALE;
|
|
|
|
if ((*ipp)->i_num.no_formal_ino != inum->no_formal_ino)
|
|
|
|
goto out;
|
|
|
|
atomic_inc(&(*ipp)->i_count);
|
|
|
|
error = 0;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!create)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
error = gfs2_glock_get(sdp, inum->no_addr, &gfs2_iopen_glops,
|
|
|
|
CREATE, &io_gl);
|
|
|
|
if (!error) {
|
|
|
|
error = inode_create(i_gl, inum, io_gl, LM_ST_SHARED, ipp);
|
|
|
|
gfs2_glock_put(io_gl);
|
|
|
|
}
|
|
|
|
|
|
|
|
out:
|
|
|
|
gfs2_glmutex_unlock(i_gl);
|
|
|
|
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
void gfs2_inode_hold(struct gfs2_inode *ip)
|
|
|
|
{
|
|
|
|
gfs2_assert(ip->i_sbd, atomic_read(&ip->i_count) > 0);
|
|
|
|
atomic_inc(&ip->i_count);
|
|
|
|
}
|
|
|
|
|
|
|
|
void gfs2_inode_put(struct gfs2_inode *ip)
|
|
|
|
{
|
|
|
|
gfs2_assert(ip->i_sbd, atomic_read(&ip->i_count) > 0);
|
|
|
|
atomic_dec(&ip->i_count);
|
|
|
|
}
|
|
|
|
|
|
|
|
void gfs2_inode_destroy(struct gfs2_inode *ip)
|
|
|
|
{
|
|
|
|
struct gfs2_sbd *sdp = ip->i_sbd;
|
|
|
|
struct gfs2_glock *io_gl = ip->i_iopen_gh.gh_gl;
|
|
|
|
struct gfs2_glock *i_gl = ip->i_gl;
|
|
|
|
|
|
|
|
gfs2_assert_warn(sdp, !atomic_read(&ip->i_count));
|
2006-02-28 06:23:27 +08:00
|
|
|
gfs2_assert(sdp, io_gl->gl_object == i_gl);
|
2006-01-17 00:50:04 +08:00
|
|
|
|
|
|
|
spin_lock(&io_gl->gl_spin);
|
2006-02-28 06:23:27 +08:00
|
|
|
io_gl->gl_object = NULL;
|
2006-01-17 00:50:04 +08:00
|
|
|
gfs2_glock_put(i_gl);
|
|
|
|
spin_unlock(&io_gl->gl_spin);
|
|
|
|
|
|
|
|
gfs2_glock_dq_uninit(&ip->i_iopen_gh);
|
|
|
|
|
|
|
|
gfs2_meta_cache_flush(ip);
|
|
|
|
kmem_cache_free(gfs2_inode_cachep, ip);
|
|
|
|
|
2006-02-28 06:23:27 +08:00
|
|
|
i_gl->gl_object = NULL;
|
2006-01-17 00:50:04 +08:00
|
|
|
gfs2_glock_put(i_gl);
|
|
|
|
|
|
|
|
atomic_dec(&sdp->sd_inode_count);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int dinode_dealloc(struct gfs2_inode *ip, struct gfs2_unlinked *ul)
|
|
|
|
{
|
|
|
|
struct gfs2_sbd *sdp = ip->i_sbd;
|
|
|
|
struct gfs2_alloc *al;
|
|
|
|
struct gfs2_rgrpd *rgd;
|
|
|
|
int error;
|
|
|
|
|
|
|
|
if (ip->i_di.di_blocks != 1) {
|
|
|
|
if (gfs2_consist_inode(ip))
|
|
|
|
gfs2_dinode_print(&ip->i_di);
|
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
|
|
|
|
al = gfs2_alloc_get(ip);
|
|
|
|
|
|
|
|
error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
|
|
|
|
if (error)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
error = gfs2_rindex_hold(sdp, &al->al_ri_gh);
|
|
|
|
if (error)
|
|
|
|
goto out_qs;
|
|
|
|
|
|
|
|
rgd = gfs2_blk2rgrpd(sdp, ip->i_num.no_addr);
|
|
|
|
if (!rgd) {
|
|
|
|
gfs2_consist_inode(ip);
|
|
|
|
error = -EIO;
|
|
|
|
goto out_rindex_relse;
|
|
|
|
}
|
|
|
|
|
|
|
|
error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0,
|
|
|
|
&al->al_rgd_gh);
|
|
|
|
if (error)
|
|
|
|
goto out_rindex_relse;
|
|
|
|
|
|
|
|
error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_UNLINKED +
|
|
|
|
RES_STATFS + RES_QUOTA, 1);
|
|
|
|
if (error)
|
|
|
|
goto out_rg_gunlock;
|
|
|
|
|
|
|
|
gfs2_trans_add_gl(ip->i_gl);
|
|
|
|
|
|
|
|
gfs2_free_di(rgd, ip);
|
|
|
|
|
|
|
|
error = gfs2_unlinked_ondisk_rm(sdp, ul);
|
|
|
|
|
|
|
|
gfs2_trans_end(sdp);
|
|
|
|
clear_bit(GLF_STICKY, &ip->i_gl->gl_flags);
|
|
|
|
|
|
|
|
out_rg_gunlock:
|
|
|
|
gfs2_glock_dq_uninit(&al->al_rgd_gh);
|
|
|
|
|
|
|
|
out_rindex_relse:
|
|
|
|
gfs2_glock_dq_uninit(&al->al_ri_gh);
|
|
|
|
|
|
|
|
out_qs:
|
|
|
|
gfs2_quota_unhold(ip);
|
|
|
|
|
|
|
|
out:
|
|
|
|
gfs2_alloc_put(ip);
|
|
|
|
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* inode_dealloc - Deallocate all on-disk blocks for an inode (dinode)
|
|
|
|
* @sdp: the filesystem
|
|
|
|
* @inum: the inode number to deallocate
|
|
|
|
* @io_gh: a holder for the iopen glock for this inode
|
|
|
|
*
|
|
|
|
* Returns: errno
|
|
|
|
*/
|
|
|
|
|
|
|
|
static int inode_dealloc(struct gfs2_sbd *sdp, struct gfs2_unlinked *ul,
|
|
|
|
struct gfs2_holder *io_gh)
|
|
|
|
{
|
|
|
|
struct gfs2_inode *ip;
|
|
|
|
struct gfs2_holder i_gh;
|
|
|
|
int error;
|
|
|
|
|
|
|
|
error = gfs2_glock_nq_num(sdp,
|
|
|
|
ul->ul_ut.ut_inum.no_addr, &gfs2_inode_glops,
|
|
|
|
LM_ST_EXCLUSIVE, 0, &i_gh);
|
|
|
|
if (error)
|
|
|
|
return error;
|
|
|
|
|
|
|
|
/* We reacquire the iopen lock here to avoid a race with the NFS server
|
|
|
|
calling gfs2_read_inode() with the inode number of a inode we're in
|
|
|
|
the process of deallocating. And we can't keep our hold on the lock
|
|
|
|
from inode_dealloc_init() for deadlock reasons. */
|
|
|
|
|
|
|
|
gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY, io_gh);
|
|
|
|
error = gfs2_glock_nq(io_gh);
|
|
|
|
switch (error) {
|
|
|
|
case 0:
|
|
|
|
break;
|
|
|
|
case GLR_TRYFAILED:
|
|
|
|
error = 1;
|
|
|
|
default:
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
2006-02-28 06:23:27 +08:00
|
|
|
gfs2_assert_warn(sdp, !i_gh.gh_gl->gl_object);
|
2006-01-17 00:50:04 +08:00
|
|
|
error = inode_create(i_gh.gh_gl, &ul->ul_ut.ut_inum, io_gh->gh_gl,
|
|
|
|
LM_ST_EXCLUSIVE, &ip);
|
|
|
|
|
|
|
|
gfs2_glock_dq(io_gh);
|
|
|
|
|
|
|
|
if (error)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
error = gfs2_inode_refresh(ip);
|
|
|
|
if (error)
|
|
|
|
goto out_iput;
|
|
|
|
|
|
|
|
if (ip->i_di.di_nlink) {
|
|
|
|
if (gfs2_consist_inode(ip))
|
|
|
|
gfs2_dinode_print(&ip->i_di);
|
|
|
|
error = -EIO;
|
|
|
|
goto out_iput;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (S_ISDIR(ip->i_di.di_mode) &&
|
|
|
|
(ip->i_di.di_flags & GFS2_DIF_EXHASH)) {
|
|
|
|
error = gfs2_dir_exhash_dealloc(ip);
|
|
|
|
if (error)
|
|
|
|
goto out_iput;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (ip->i_di.di_eattr) {
|
|
|
|
error = gfs2_ea_dealloc(ip);
|
|
|
|
if (error)
|
|
|
|
goto out_iput;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!gfs2_is_stuffed(ip)) {
|
|
|
|
error = gfs2_file_dealloc(ip);
|
|
|
|
if (error)
|
|
|
|
goto out_iput;
|
|
|
|
}
|
|
|
|
|
|
|
|
error = dinode_dealloc(ip, ul);
|
|
|
|
if (error)
|
|
|
|
goto out_iput;
|
|
|
|
|
|
|
|
out_iput:
|
|
|
|
gfs2_glmutex_lock(i_gh.gh_gl);
|
|
|
|
gfs2_inode_put(ip);
|
|
|
|
gfs2_inode_destroy(ip);
|
|
|
|
gfs2_glmutex_unlock(i_gh.gh_gl);
|
|
|
|
|
|
|
|
out:
|
|
|
|
gfs2_glock_dq_uninit(&i_gh);
|
|
|
|
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* try_inode_dealloc - Try to deallocate an inode and all its blocks
|
|
|
|
* @sdp: the filesystem
|
|
|
|
*
|
|
|
|
* Returns: 0 on success, -errno on error, 1 on busy (inode open)
|
|
|
|
*/
|
|
|
|
|
|
|
|
static int try_inode_dealloc(struct gfs2_sbd *sdp, struct gfs2_unlinked *ul)
|
|
|
|
{
|
|
|
|
struct gfs2_holder io_gh;
|
|
|
|
int error = 0;
|
|
|
|
|
|
|
|
gfs2_try_toss_inode(sdp, &ul->ul_ut.ut_inum);
|
|
|
|
|
|
|
|
error = gfs2_glock_nq_num(sdp,
|
|
|
|
ul->ul_ut.ut_inum.no_addr, &gfs2_iopen_glops,
|
|
|
|
LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB, &io_gh);
|
|
|
|
switch (error) {
|
|
|
|
case 0:
|
|
|
|
break;
|
|
|
|
case GLR_TRYFAILED:
|
|
|
|
return 1;
|
|
|
|
default:
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
gfs2_glock_dq(&io_gh);
|
|
|
|
error = inode_dealloc(sdp, ul, &io_gh);
|
|
|
|
gfs2_holder_uninit(&io_gh);
|
|
|
|
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int inode_dealloc_uninit(struct gfs2_sbd *sdp, struct gfs2_unlinked *ul)
|
|
|
|
{
|
|
|
|
struct gfs2_rgrpd *rgd;
|
|
|
|
struct gfs2_holder ri_gh, rgd_gh;
|
|
|
|
int error;
|
|
|
|
|
|
|
|
error = gfs2_rindex_hold(sdp, &ri_gh);
|
|
|
|
if (error)
|
|
|
|
return error;
|
|
|
|
|
|
|
|
rgd = gfs2_blk2rgrpd(sdp, ul->ul_ut.ut_inum.no_addr);
|
|
|
|
if (!rgd) {
|
|
|
|
gfs2_consist(sdp);
|
|
|
|
error = -EIO;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rgd_gh);
|
|
|
|
if (error)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
error = gfs2_trans_begin(sdp,
|
|
|
|
RES_RG_BIT + RES_UNLINKED + RES_STATFS,
|
|
|
|
0);
|
|
|
|
if (error)
|
|
|
|
goto out_gunlock;
|
|
|
|
|
|
|
|
gfs2_free_uninit_di(rgd, ul->ul_ut.ut_inum.no_addr);
|
|
|
|
gfs2_unlinked_ondisk_rm(sdp, ul);
|
|
|
|
|
|
|
|
gfs2_trans_end(sdp);
|
|
|
|
|
|
|
|
out_gunlock:
|
|
|
|
gfs2_glock_dq_uninit(&rgd_gh);
|
|
|
|
out:
|
|
|
|
gfs2_glock_dq_uninit(&ri_gh);
|
|
|
|
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
int gfs2_inode_dealloc(struct gfs2_sbd *sdp, struct gfs2_unlinked *ul)
|
|
|
|
{
|
|
|
|
if (ul->ul_ut.ut_flags & GFS2_UTF_UNINIT)
|
|
|
|
return inode_dealloc_uninit(sdp, ul);
|
|
|
|
else
|
|
|
|
return try_inode_dealloc(sdp, ul);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* gfs2_change_nlink - Change nlink count on inode
|
|
|
|
* @ip: The GFS2 inode
|
|
|
|
* @diff: The change in the nlink count required
|
|
|
|
*
|
|
|
|
* Returns: errno
|
|
|
|
*/
|
|
|
|
|
|
|
|
int gfs2_change_nlink(struct gfs2_inode *ip, int diff)
|
|
|
|
{
|
|
|
|
struct buffer_head *dibh;
|
|
|
|
uint32_t nlink;
|
|
|
|
int error;
|
|
|
|
|
|
|
|
nlink = ip->i_di.di_nlink + diff;
|
|
|
|
|
|
|
|
/* If we are reducing the nlink count, but the new value ends up being
|
|
|
|
bigger than the old one, we must have underflowed. */
|
|
|
|
if (diff < 0 && nlink > ip->i_di.di_nlink) {
|
|
|
|
if (gfs2_consist_inode(ip))
|
|
|
|
gfs2_dinode_print(&ip->i_di);
|
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
|
|
|
|
error = gfs2_meta_inode_buffer(ip, &dibh);
|
|
|
|
if (error)
|
|
|
|
return error;
|
|
|
|
|
|
|
|
ip->i_di.di_nlink = nlink;
|
|
|
|
ip->i_di.di_ctime = get_seconds();
|
|
|
|
|
2006-01-18 19:19:28 +08:00
|
|
|
gfs2_trans_add_bh(ip->i_gl, dibh, 1);
|
2006-01-17 00:50:04 +08:00
|
|
|
gfs2_dinode_out(&ip->i_di, dibh->b_data);
|
|
|
|
brelse(dibh);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2006-03-21 01:30:04 +08:00
|
|
|
struct inode *gfs2_lookup_simple(struct inode *dip, const char *name)
|
|
|
|
{
|
|
|
|
struct qstr qstr;
|
2006-03-29 03:14:04 +08:00
|
|
|
gfs2_str2qstr(&qstr, name);
|
2006-03-21 01:30:04 +08:00
|
|
|
return gfs2_lookupi(dip, &qstr, 1, NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2006-01-17 00:50:04 +08:00
|
|
|
/**
|
|
|
|
* gfs2_lookupi - Look up a filename in a directory and return its inode
|
|
|
|
* @d_gh: An initialized holder for the directory glock
|
|
|
|
* @name: The name of the inode to look for
|
|
|
|
* @is_root: If 1, ignore the caller's permissions
|
|
|
|
* @i_gh: An uninitialized holder for the new inode glock
|
|
|
|
*
|
|
|
|
* There will always be a vnode (Linux VFS inode) for the d_gh inode unless
|
|
|
|
* @is_root is true.
|
|
|
|
*
|
|
|
|
* Returns: errno
|
|
|
|
*/
|
|
|
|
|
2006-03-21 01:30:04 +08:00
|
|
|
struct inode *gfs2_lookupi(struct inode *dir, struct qstr *name, int is_root,
|
|
|
|
struct nameidata *nd)
|
|
|
|
|
2006-01-17 00:50:04 +08:00
|
|
|
{
|
2006-03-02 04:31:02 +08:00
|
|
|
struct super_block *sb = dir->i_sb;
|
2006-02-13 20:27:43 +08:00
|
|
|
struct gfs2_inode *ipp;
|
2006-02-28 06:23:27 +08:00
|
|
|
struct gfs2_inode *dip = dir->u.generic_ip;
|
2006-01-17 00:50:04 +08:00
|
|
|
struct gfs2_sbd *sdp = dip->i_sbd;
|
|
|
|
struct gfs2_holder d_gh;
|
|
|
|
struct gfs2_inum inum;
|
|
|
|
unsigned int type;
|
|
|
|
struct gfs2_glock *gl;
|
2006-02-13 20:27:43 +08:00
|
|
|
int error = 0;
|
2006-03-21 01:30:04 +08:00
|
|
|
struct inode *inode = NULL;
|
2006-01-17 00:50:04 +08:00
|
|
|
|
|
|
|
if (!name->len || name->len > GFS2_FNAMESIZE)
|
2006-03-21 01:30:04 +08:00
|
|
|
return ERR_PTR(-ENAMETOOLONG);
|
2006-01-17 00:50:04 +08:00
|
|
|
|
2006-03-21 01:30:04 +08:00
|
|
|
if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) ||
|
|
|
|
(name->len == 2 && memcmp(name->name, "..", 2) == 0 &&
|
|
|
|
dir == sb->s_root->d_inode)) {
|
2006-01-17 00:50:04 +08:00
|
|
|
gfs2_inode_hold(dip);
|
2006-02-13 20:27:43 +08:00
|
|
|
ipp = dip;
|
|
|
|
goto done;
|
2006-01-17 00:50:04 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
|
|
|
|
if (error)
|
2006-03-21 01:30:04 +08:00
|
|
|
return ERR_PTR(error);
|
2006-01-17 00:50:04 +08:00
|
|
|
|
|
|
|
if (!is_root) {
|
|
|
|
error = gfs2_repermission(dip->i_vnode, MAY_EXEC, NULL);
|
|
|
|
if (error)
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
2006-03-21 01:30:04 +08:00
|
|
|
error = gfs2_dir_search(dir, name, &inum, &type);
|
2006-01-17 00:50:04 +08:00
|
|
|
if (error)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
error = gfs2_glock_get(sdp, inum.no_addr, &gfs2_inode_glops,
|
|
|
|
CREATE, &gl);
|
|
|
|
if (error)
|
|
|
|
goto out;
|
|
|
|
|
2006-02-13 20:27:43 +08:00
|
|
|
error = gfs2_inode_get(gl, &inum, CREATE, &ipp);
|
2006-01-17 00:50:04 +08:00
|
|
|
if (!error)
|
2006-02-13 20:27:43 +08:00
|
|
|
gfs2_inode_min_init(ipp, type);
|
2006-01-17 00:50:04 +08:00
|
|
|
|
|
|
|
gfs2_glock_put(gl);
|
|
|
|
|
2006-02-13 20:27:43 +08:00
|
|
|
out:
|
2006-01-17 00:50:04 +08:00
|
|
|
gfs2_glock_dq_uninit(&d_gh);
|
2006-02-13 20:27:43 +08:00
|
|
|
done:
|
2006-03-21 01:30:04 +08:00
|
|
|
if (error == -ENOENT)
|
|
|
|
return NULL;
|
2006-02-13 20:27:43 +08:00
|
|
|
if (error == 0) {
|
2006-03-21 01:30:04 +08:00
|
|
|
inode = gfs2_ip2v(ipp);
|
2006-02-13 20:27:43 +08:00
|
|
|
gfs2_inode_put(ipp);
|
2006-03-21 01:30:04 +08:00
|
|
|
if (!inode)
|
|
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
return inode;
|
2006-02-13 20:27:43 +08:00
|
|
|
}
|
2006-03-21 01:30:04 +08:00
|
|
|
return ERR_PTR(error);
|
2006-01-17 00:50:04 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static int pick_formal_ino_1(struct gfs2_sbd *sdp, uint64_t *formal_ino)
|
|
|
|
{
|
2006-02-28 06:23:27 +08:00
|
|
|
struct gfs2_inode *ip = sdp->sd_ir_inode->u.generic_ip;
|
2006-01-17 00:50:04 +08:00
|
|
|
struct buffer_head *bh;
|
|
|
|
struct gfs2_inum_range ir;
|
|
|
|
int error;
|
|
|
|
|
|
|
|
error = gfs2_trans_begin(sdp, RES_DINODE, 0);
|
|
|
|
if (error)
|
|
|
|
return error;
|
2006-02-21 20:51:39 +08:00
|
|
|
mutex_lock(&sdp->sd_inum_mutex);
|
2006-01-17 00:50:04 +08:00
|
|
|
|
|
|
|
error = gfs2_meta_inode_buffer(ip, &bh);
|
|
|
|
if (error) {
|
2006-02-21 20:51:39 +08:00
|
|
|
mutex_unlock(&sdp->sd_inum_mutex);
|
2006-01-17 00:50:04 +08:00
|
|
|
gfs2_trans_end(sdp);
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode));
|
|
|
|
|
|
|
|
if (ir.ir_length) {
|
|
|
|
*formal_ino = ir.ir_start++;
|
|
|
|
ir.ir_length--;
|
2006-01-18 19:19:28 +08:00
|
|
|
gfs2_trans_add_bh(ip->i_gl, bh, 1);
|
2006-01-17 00:50:04 +08:00
|
|
|
gfs2_inum_range_out(&ir,
|
|
|
|
bh->b_data + sizeof(struct gfs2_dinode));
|
|
|
|
brelse(bh);
|
2006-02-21 20:51:39 +08:00
|
|
|
mutex_unlock(&sdp->sd_inum_mutex);
|
2006-01-17 00:50:04 +08:00
|
|
|
gfs2_trans_end(sdp);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
brelse(bh);
|
|
|
|
|
2006-02-21 20:51:39 +08:00
|
|
|
mutex_unlock(&sdp->sd_inum_mutex);
|
2006-01-17 00:50:04 +08:00
|
|
|
gfs2_trans_end(sdp);
|
|
|
|
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int pick_formal_ino_2(struct gfs2_sbd *sdp, uint64_t *formal_ino)
|
|
|
|
{
|
2006-02-28 06:23:27 +08:00
|
|
|
struct gfs2_inode *ip = sdp->sd_ir_inode->u.generic_ip;
|
|
|
|
struct gfs2_inode *m_ip = sdp->sd_inum_inode->u.generic_ip;
|
2006-01-17 00:50:04 +08:00
|
|
|
struct gfs2_holder gh;
|
|
|
|
struct buffer_head *bh;
|
|
|
|
struct gfs2_inum_range ir;
|
|
|
|
int error;
|
|
|
|
|
|
|
|
error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
|
|
|
|
if (error)
|
|
|
|
return error;
|
|
|
|
|
|
|
|
error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0);
|
|
|
|
if (error)
|
|
|
|
goto out;
|
2006-02-21 20:51:39 +08:00
|
|
|
mutex_lock(&sdp->sd_inum_mutex);
|
2006-01-17 00:50:04 +08:00
|
|
|
|
|
|
|
error = gfs2_meta_inode_buffer(ip, &bh);
|
|
|
|
if (error)
|
|
|
|
goto out_end_trans;
|
|
|
|
|
|
|
|
gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode));
|
|
|
|
|
|
|
|
if (!ir.ir_length) {
|
|
|
|
struct buffer_head *m_bh;
|
|
|
|
uint64_t x, y;
|
|
|
|
|
|
|
|
error = gfs2_meta_inode_buffer(m_ip, &m_bh);
|
|
|
|
if (error)
|
|
|
|
goto out_brelse;
|
|
|
|
|
|
|
|
x = *(uint64_t *)(m_bh->b_data + sizeof(struct gfs2_dinode));
|
|
|
|
x = y = be64_to_cpu(x);
|
|
|
|
ir.ir_start = x;
|
|
|
|
ir.ir_length = GFS2_INUM_QUANTUM;
|
|
|
|
x += GFS2_INUM_QUANTUM;
|
|
|
|
if (x < y)
|
|
|
|
gfs2_consist_inode(m_ip);
|
|
|
|
x = cpu_to_be64(x);
|
2006-01-18 19:19:28 +08:00
|
|
|
gfs2_trans_add_bh(m_ip->i_gl, m_bh, 1);
|
2006-01-17 00:50:04 +08:00
|
|
|
*(uint64_t *)(m_bh->b_data + sizeof(struct gfs2_dinode)) = x;
|
|
|
|
|
|
|
|
brelse(m_bh);
|
|
|
|
}
|
|
|
|
|
|
|
|
*formal_ino = ir.ir_start++;
|
|
|
|
ir.ir_length--;
|
|
|
|
|
2006-01-18 19:19:28 +08:00
|
|
|
gfs2_trans_add_bh(ip->i_gl, bh, 1);
|
2006-01-17 00:50:04 +08:00
|
|
|
gfs2_inum_range_out(&ir, bh->b_data + sizeof(struct gfs2_dinode));
|
|
|
|
|
|
|
|
out_brelse:
|
|
|
|
brelse(bh);
|
|
|
|
|
|
|
|
out_end_trans:
|
2006-02-21 20:51:39 +08:00
|
|
|
mutex_unlock(&sdp->sd_inum_mutex);
|
2006-01-17 00:50:04 +08:00
|
|
|
gfs2_trans_end(sdp);
|
|
|
|
|
|
|
|
out:
|
|
|
|
gfs2_glock_dq_uninit(&gh);
|
|
|
|
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int pick_formal_ino(struct gfs2_sbd *sdp, uint64_t *inum)
|
|
|
|
{
|
|
|
|
int error;
|
|
|
|
|
|
|
|
error = pick_formal_ino_1(sdp, inum);
|
|
|
|
if (error <= 0)
|
|
|
|
return error;
|
|
|
|
|
|
|
|
error = pick_formal_ino_2(sdp, inum);
|
|
|
|
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* create_ok - OK to create a new on-disk inode here?
|
|
|
|
* @dip: Directory in which dinode is to be created
|
|
|
|
* @name: Name of new dinode
|
|
|
|
* @mode:
|
|
|
|
*
|
|
|
|
* Returns: errno
|
|
|
|
*/
|
|
|
|
|
|
|
|
static int create_ok(struct gfs2_inode *dip, struct qstr *name,
|
|
|
|
unsigned int mode)
|
|
|
|
{
|
|
|
|
int error;
|
|
|
|
|
|
|
|
error = gfs2_repermission(dip->i_vnode, MAY_WRITE | MAY_EXEC, NULL);
|
|
|
|
if (error)
|
|
|
|
return error;
|
|
|
|
|
|
|
|
/* Don't create entries in an unlinked directory */
|
|
|
|
if (!dip->i_di.di_nlink)
|
|
|
|
return -EPERM;
|
|
|
|
|
2006-03-21 01:30:04 +08:00
|
|
|
error = gfs2_dir_search(dip->i_vnode, name, NULL, NULL);
|
2006-01-17 00:50:04 +08:00
|
|
|
switch (error) {
|
|
|
|
case -ENOENT:
|
|
|
|
error = 0;
|
|
|
|
break;
|
|
|
|
case 0:
|
|
|
|
return -EEXIST;
|
|
|
|
default:
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (dip->i_di.di_entries == (uint32_t)-1)
|
|
|
|
return -EFBIG;
|
|
|
|
if (S_ISDIR(mode) && dip->i_di.di_nlink == (uint32_t)-1)
|
|
|
|
return -EMLINK;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void munge_mode_uid_gid(struct gfs2_inode *dip, unsigned int *mode,
|
|
|
|
unsigned int *uid, unsigned int *gid)
|
|
|
|
{
|
|
|
|
if (dip->i_sbd->sd_args.ar_suiddir &&
|
|
|
|
(dip->i_di.di_mode & S_ISUID) &&
|
|
|
|
dip->i_di.di_uid) {
|
|
|
|
if (S_ISDIR(*mode))
|
|
|
|
*mode |= S_ISUID;
|
|
|
|
else if (dip->i_di.di_uid != current->fsuid)
|
|
|
|
*mode &= ~07111;
|
|
|
|
*uid = dip->i_di.di_uid;
|
|
|
|
} else
|
|
|
|
*uid = current->fsuid;
|
|
|
|
|
|
|
|
if (dip->i_di.di_mode & S_ISGID) {
|
|
|
|
if (S_ISDIR(*mode))
|
|
|
|
*mode |= S_ISGID;
|
|
|
|
*gid = dip->i_di.di_gid;
|
|
|
|
} else
|
|
|
|
*gid = current->fsgid;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int alloc_dinode(struct gfs2_inode *dip, struct gfs2_unlinked *ul)
|
|
|
|
{
|
|
|
|
struct gfs2_sbd *sdp = dip->i_sbd;
|
|
|
|
int error;
|
|
|
|
|
|
|
|
gfs2_alloc_get(dip);
|
|
|
|
|
|
|
|
dip->i_alloc.al_requested = RES_DINODE;
|
|
|
|
error = gfs2_inplace_reserve(dip);
|
|
|
|
if (error)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_UNLINKED +
|
|
|
|
RES_STATFS, 0);
|
|
|
|
if (error)
|
|
|
|
goto out_ipreserv;
|
|
|
|
|
|
|
|
ul->ul_ut.ut_inum.no_addr = gfs2_alloc_di(dip);
|
|
|
|
|
|
|
|
ul->ul_ut.ut_flags = GFS2_UTF_UNINIT;
|
|
|
|
error = gfs2_unlinked_ondisk_add(sdp, ul);
|
|
|
|
|
|
|
|
gfs2_trans_end(sdp);
|
|
|
|
|
|
|
|
out_ipreserv:
|
|
|
|
gfs2_inplace_release(dip);
|
|
|
|
|
|
|
|
out:
|
|
|
|
gfs2_alloc_put(dip);
|
|
|
|
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* init_dinode - Fill in a new dinode structure
|
|
|
|
* @dip: the directory this inode is being created in
|
|
|
|
* @gl: The glock covering the new inode
|
|
|
|
* @inum: the inode number
|
|
|
|
* @mode: the file permissions
|
|
|
|
* @uid:
|
|
|
|
* @gid:
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
|
|
|
|
struct gfs2_inum *inum, unsigned int mode,
|
|
|
|
unsigned int uid, unsigned int gid)
|
|
|
|
{
|
|
|
|
struct gfs2_sbd *sdp = dip->i_sbd;
|
2006-01-18 18:57:10 +08:00
|
|
|
struct gfs2_dinode *di;
|
2006-01-17 00:50:04 +08:00
|
|
|
struct buffer_head *dibh;
|
|
|
|
|
|
|
|
dibh = gfs2_meta_new(gl, inum->no_addr);
|
2006-01-18 19:19:28 +08:00
|
|
|
gfs2_trans_add_bh(gl, dibh, 1);
|
2006-01-17 00:50:04 +08:00
|
|
|
gfs2_metatype_set(dibh, GFS2_METATYPE_DI, GFS2_FORMAT_DI);
|
|
|
|
gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode));
|
2006-01-18 18:57:10 +08:00
|
|
|
di = (struct gfs2_dinode *)dibh->b_data;
|
|
|
|
|
2006-01-30 19:49:32 +08:00
|
|
|
di->di_num.no_formal_ino = cpu_to_be64(inum->no_formal_ino);
|
|
|
|
di->di_num.no_addr = cpu_to_be64(inum->no_addr);
|
2006-01-18 18:57:10 +08:00
|
|
|
di->di_mode = cpu_to_be32(mode);
|
|
|
|
di->di_uid = cpu_to_be32(uid);
|
|
|
|
di->di_gid = cpu_to_be32(gid);
|
|
|
|
di->di_nlink = cpu_to_be32(0);
|
|
|
|
di->di_size = cpu_to_be64(0);
|
|
|
|
di->di_blocks = cpu_to_be64(1);
|
|
|
|
di->di_atime = di->di_mtime = di->di_ctime = cpu_to_be64(get_seconds());
|
|
|
|
di->di_major = di->di_minor = cpu_to_be32(0);
|
|
|
|
di->di_goal_meta = di->di_goal_data = cpu_to_be64(inum->no_addr);
|
|
|
|
di->__pad[0] = di->__pad[1] = 0;
|
|
|
|
di->di_flags = cpu_to_be32(0);
|
2006-01-17 00:50:04 +08:00
|
|
|
|
|
|
|
if (S_ISREG(mode)) {
|
|
|
|
if ((dip->i_di.di_flags & GFS2_DIF_INHERIT_JDATA) ||
|
|
|
|
gfs2_tune_get(sdp, gt_new_files_jdata))
|
2006-01-18 18:57:10 +08:00
|
|
|
di->di_flags |= cpu_to_be32(GFS2_DIF_JDATA);
|
2006-01-17 00:50:04 +08:00
|
|
|
if ((dip->i_di.di_flags & GFS2_DIF_INHERIT_DIRECTIO) ||
|
|
|
|
gfs2_tune_get(sdp, gt_new_files_directio))
|
2006-01-18 18:57:10 +08:00
|
|
|
di->di_flags |= cpu_to_be32(GFS2_DIF_DIRECTIO);
|
2006-01-17 00:50:04 +08:00
|
|
|
} else if (S_ISDIR(mode)) {
|
2006-02-28 01:00:42 +08:00
|
|
|
di->di_flags |= cpu_to_be32(dip->i_di.di_flags &
|
|
|
|
GFS2_DIF_INHERIT_DIRECTIO);
|
|
|
|
di->di_flags |= cpu_to_be32(dip->i_di.di_flags &
|
|
|
|
GFS2_DIF_INHERIT_JDATA);
|
2006-01-17 00:50:04 +08:00
|
|
|
}
|
|
|
|
|
2006-01-18 18:57:10 +08:00
|
|
|
di->__pad1 = 0;
|
|
|
|
di->di_height = cpu_to_be32(0);
|
|
|
|
di->__pad2 = 0;
|
|
|
|
di->__pad3 = 0;
|
|
|
|
di->di_depth = cpu_to_be16(0);
|
|
|
|
di->di_entries = cpu_to_be32(0);
|
|
|
|
memset(&di->__pad4, 0, sizeof(di->__pad4));
|
|
|
|
di->di_eattr = cpu_to_be64(0);
|
|
|
|
memset(&di->di_reserved, 0, sizeof(di->di_reserved));
|
|
|
|
|
2006-01-17 00:50:04 +08:00
|
|
|
brelse(dibh);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
|
|
|
|
unsigned int mode, struct gfs2_unlinked *ul)
|
|
|
|
{
|
|
|
|
struct gfs2_sbd *sdp = dip->i_sbd;
|
|
|
|
unsigned int uid, gid;
|
|
|
|
int error;
|
|
|
|
|
|
|
|
munge_mode_uid_gid(dip, &mode, &uid, &gid);
|
|
|
|
|
|
|
|
gfs2_alloc_get(dip);
|
|
|
|
|
|
|
|
error = gfs2_quota_lock(dip, uid, gid);
|
|
|
|
if (error)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
error = gfs2_quota_check(dip, uid, gid);
|
|
|
|
if (error)
|
|
|
|
goto out_quota;
|
|
|
|
|
|
|
|
error = gfs2_trans_begin(sdp, RES_DINODE + RES_UNLINKED +
|
|
|
|
RES_QUOTA, 0);
|
|
|
|
if (error)
|
|
|
|
goto out_quota;
|
|
|
|
|
|
|
|
ul->ul_ut.ut_flags = 0;
|
|
|
|
error = gfs2_unlinked_ondisk_munge(sdp, ul);
|
|
|
|
|
|
|
|
init_dinode(dip, gl, &ul->ul_ut.ut_inum,
|
|
|
|
mode, uid, gid);
|
|
|
|
|
|
|
|
gfs2_quota_change(dip, +1, uid, gid);
|
|
|
|
|
|
|
|
gfs2_trans_end(sdp);
|
|
|
|
|
|
|
|
out_quota:
|
|
|
|
gfs2_quota_unlock(dip);
|
|
|
|
|
|
|
|
out:
|
|
|
|
gfs2_alloc_put(dip);
|
|
|
|
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int link_dinode(struct gfs2_inode *dip, struct qstr *name,
|
|
|
|
struct gfs2_inode *ip, struct gfs2_unlinked *ul)
|
|
|
|
{
|
|
|
|
struct gfs2_sbd *sdp = dip->i_sbd;
|
|
|
|
struct gfs2_alloc *al;
|
|
|
|
int alloc_required;
|
|
|
|
struct buffer_head *dibh;
|
|
|
|
int error;
|
|
|
|
|
|
|
|
al = gfs2_alloc_get(dip);
|
|
|
|
|
|
|
|
error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
|
|
|
|
if (error)
|
|
|
|
goto fail;
|
|
|
|
|
2006-03-21 01:30:04 +08:00
|
|
|
error = alloc_required = gfs2_diradd_alloc_required(dip->i_vnode, name);
|
|
|
|
if (alloc_required < 0)
|
|
|
|
goto fail;
|
2006-01-17 00:50:04 +08:00
|
|
|
if (alloc_required) {
|
|
|
|
error = gfs2_quota_check(dip, dip->i_di.di_uid,
|
|
|
|
dip->i_di.di_gid);
|
|
|
|
if (error)
|
|
|
|
goto fail_quota_locks;
|
|
|
|
|
|
|
|
al->al_requested = sdp->sd_max_dirres;
|
|
|
|
|
|
|
|
error = gfs2_inplace_reserve(dip);
|
|
|
|
if (error)
|
|
|
|
goto fail_quota_locks;
|
|
|
|
|
|
|
|
error = gfs2_trans_begin(sdp,
|
|
|
|
sdp->sd_max_dirres +
|
|
|
|
al->al_rgd->rd_ri.ri_length +
|
|
|
|
2 * RES_DINODE + RES_UNLINKED +
|
|
|
|
RES_STATFS + RES_QUOTA, 0);
|
|
|
|
if (error)
|
|
|
|
goto fail_ipreserv;
|
|
|
|
} else {
|
|
|
|
error = gfs2_trans_begin(sdp,
|
|
|
|
RES_LEAF +
|
|
|
|
2 * RES_DINODE +
|
|
|
|
RES_UNLINKED, 0);
|
|
|
|
if (error)
|
|
|
|
goto fail_quota_locks;
|
|
|
|
}
|
|
|
|
|
2006-03-21 01:30:04 +08:00
|
|
|
error = gfs2_dir_add(dip->i_vnode, name, &ip->i_num, IF2DT(ip->i_di.di_mode));
|
2006-01-17 00:50:04 +08:00
|
|
|
if (error)
|
|
|
|
goto fail_end_trans;
|
|
|
|
|
|
|
|
error = gfs2_meta_inode_buffer(ip, &dibh);
|
|
|
|
if (error)
|
|
|
|
goto fail_end_trans;
|
|
|
|
ip->i_di.di_nlink = 1;
|
2006-01-18 19:19:28 +08:00
|
|
|
gfs2_trans_add_bh(ip->i_gl, dibh, 1);
|
2006-01-17 00:50:04 +08:00
|
|
|
gfs2_dinode_out(&ip->i_di, dibh->b_data);
|
|
|
|
brelse(dibh);
|
|
|
|
|
|
|
|
error = gfs2_unlinked_ondisk_rm(sdp, ul);
|
|
|
|
if (error)
|
|
|
|
goto fail_end_trans;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
fail_end_trans:
|
|
|
|
gfs2_trans_end(sdp);
|
|
|
|
|
|
|
|
fail_ipreserv:
|
|
|
|
if (dip->i_alloc.al_rgd)
|
|
|
|
gfs2_inplace_release(dip);
|
|
|
|
|
|
|
|
fail_quota_locks:
|
|
|
|
gfs2_quota_unlock(dip);
|
|
|
|
|
|
|
|
fail:
|
|
|
|
gfs2_alloc_put(dip);
|
|
|
|
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* gfs2_createi - Create a new inode
|
|
|
|
* @ghs: An array of two holders
|
|
|
|
* @name: The name of the new file
|
|
|
|
* @mode: the permissions on the new inode
|
|
|
|
*
|
|
|
|
* @ghs[0] is an initialized holder for the directory
|
|
|
|
* @ghs[1] is the holder for the inode lock
|
|
|
|
*
|
2006-02-13 20:27:43 +08:00
|
|
|
* If the return value is not NULL, the glocks on both the directory and the new
|
2006-01-17 00:50:04 +08:00
|
|
|
* file are held. A transaction has been started and an inplace reservation
|
|
|
|
* is held, as well.
|
|
|
|
*
|
2006-02-13 20:27:43 +08:00
|
|
|
* Returns: An inode
|
2006-01-17 00:50:04 +08:00
|
|
|
*/
|
|
|
|
|
2006-02-28 01:00:42 +08:00
|
|
|
struct inode *gfs2_createi(struct gfs2_holder *ghs, struct qstr *name,
|
|
|
|
unsigned int mode)
|
2006-01-17 00:50:04 +08:00
|
|
|
{
|
2006-02-13 20:27:43 +08:00
|
|
|
struct inode *inode;
|
2006-02-28 06:23:27 +08:00
|
|
|
struct gfs2_inode *dip = ghs->gh_gl->gl_object;
|
2006-01-17 00:50:04 +08:00
|
|
|
struct gfs2_sbd *sdp = dip->i_sbd;
|
|
|
|
struct gfs2_unlinked *ul;
|
|
|
|
struct gfs2_inode *ip;
|
|
|
|
int error;
|
|
|
|
|
|
|
|
if (!name->len || name->len > GFS2_FNAMESIZE)
|
2006-02-13 20:27:43 +08:00
|
|
|
return ERR_PTR(-ENAMETOOLONG);
|
2006-01-17 00:50:04 +08:00
|
|
|
|
|
|
|
error = gfs2_unlinked_get(sdp, &ul);
|
|
|
|
if (error)
|
2006-02-13 20:27:43 +08:00
|
|
|
return ERR_PTR(error);
|
2006-01-17 00:50:04 +08:00
|
|
|
|
|
|
|
gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, ghs);
|
|
|
|
error = gfs2_glock_nq(ghs);
|
|
|
|
if (error)
|
|
|
|
goto fail;
|
|
|
|
|
|
|
|
error = create_ok(dip, name, mode);
|
|
|
|
if (error)
|
|
|
|
goto fail_gunlock;
|
|
|
|
|
|
|
|
error = pick_formal_ino(sdp, &ul->ul_ut.ut_inum.no_formal_ino);
|
|
|
|
if (error)
|
|
|
|
goto fail_gunlock;
|
|
|
|
|
|
|
|
error = alloc_dinode(dip, ul);
|
|
|
|
if (error)
|
|
|
|
goto fail_gunlock;
|
|
|
|
|
|
|
|
if (ul->ul_ut.ut_inum.no_addr < dip->i_num.no_addr) {
|
|
|
|
gfs2_glock_dq(ghs);
|
|
|
|
|
|
|
|
error = gfs2_glock_nq_num(sdp,
|
|
|
|
ul->ul_ut.ut_inum.no_addr,
|
|
|
|
&gfs2_inode_glops,
|
|
|
|
LM_ST_EXCLUSIVE, GL_SKIP,
|
|
|
|
ghs + 1);
|
|
|
|
if (error) {
|
|
|
|
gfs2_unlinked_put(sdp, ul);
|
2006-02-13 20:27:43 +08:00
|
|
|
return ERR_PTR(error);
|
2006-01-17 00:50:04 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, ghs);
|
|
|
|
error = gfs2_glock_nq(ghs);
|
|
|
|
if (error) {
|
|
|
|
gfs2_glock_dq_uninit(ghs + 1);
|
|
|
|
gfs2_unlinked_put(sdp, ul);
|
2006-02-13 20:27:43 +08:00
|
|
|
return ERR_PTR(error);
|
2006-01-17 00:50:04 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
error = create_ok(dip, name, mode);
|
|
|
|
if (error)
|
|
|
|
goto fail_gunlock2;
|
|
|
|
} else {
|
|
|
|
error = gfs2_glock_nq_num(sdp,
|
|
|
|
ul->ul_ut.ut_inum.no_addr,
|
|
|
|
&gfs2_inode_glops,
|
|
|
|
LM_ST_EXCLUSIVE, GL_SKIP,
|
|
|
|
ghs + 1);
|
|
|
|
if (error)
|
|
|
|
goto fail_gunlock;
|
|
|
|
}
|
|
|
|
|
|
|
|
error = make_dinode(dip, ghs[1].gh_gl, mode, ul);
|
|
|
|
if (error)
|
|
|
|
goto fail_gunlock2;
|
|
|
|
|
|
|
|
error = gfs2_inode_get(ghs[1].gh_gl, &ul->ul_ut.ut_inum, CREATE, &ip);
|
|
|
|
if (error)
|
|
|
|
goto fail_gunlock2;
|
|
|
|
|
|
|
|
error = gfs2_inode_refresh(ip);
|
|
|
|
if (error)
|
|
|
|
goto fail_iput;
|
|
|
|
|
|
|
|
error = gfs2_acl_create(dip, ip);
|
|
|
|
if (error)
|
|
|
|
goto fail_iput;
|
|
|
|
|
|
|
|
error = link_dinode(dip, name, ip, ul);
|
|
|
|
if (error)
|
|
|
|
goto fail_iput;
|
|
|
|
|
|
|
|
gfs2_unlinked_put(sdp, ul);
|
|
|
|
|
2006-02-13 20:27:43 +08:00
|
|
|
inode = gfs2_ip2v(ip);
|
|
|
|
gfs2_inode_put(ip);
|
|
|
|
if (!inode)
|
|
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
return inode;
|
2006-01-17 00:50:04 +08:00
|
|
|
|
|
|
|
fail_iput:
|
|
|
|
gfs2_inode_put(ip);
|
|
|
|
|
|
|
|
fail_gunlock2:
|
|
|
|
gfs2_glock_dq_uninit(ghs + 1);
|
|
|
|
|
|
|
|
fail_gunlock:
|
|
|
|
gfs2_glock_dq(ghs);
|
|
|
|
|
|
|
|
fail:
|
|
|
|
gfs2_unlinked_put(sdp, ul);
|
|
|
|
|
2006-02-13 20:27:43 +08:00
|
|
|
return ERR_PTR(error);
|
2006-01-17 00:50:04 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* gfs2_unlinki - Unlink a file
|
|
|
|
* @dip: The inode of the directory
|
|
|
|
* @name: The name of the file to be unlinked
|
|
|
|
* @ip: The inode of the file to be removed
|
|
|
|
*
|
|
|
|
* Assumes Glocks on both dip and ip are held.
|
|
|
|
*
|
|
|
|
* Returns: errno
|
|
|
|
*/
|
|
|
|
|
|
|
|
int gfs2_unlinki(struct gfs2_inode *dip, struct qstr *name,
|
|
|
|
struct gfs2_inode *ip, struct gfs2_unlinked *ul)
|
|
|
|
{
|
|
|
|
struct gfs2_sbd *sdp = dip->i_sbd;
|
|
|
|
int error;
|
|
|
|
|
|
|
|
error = gfs2_dir_del(dip, name);
|
|
|
|
if (error)
|
|
|
|
return error;
|
|
|
|
|
|
|
|
error = gfs2_change_nlink(ip, -1);
|
|
|
|
if (error)
|
|
|
|
return error;
|
|
|
|
|
|
|
|
/* If this inode is being unlinked from the directory structure,
|
|
|
|
we need to mark that in the log so that it isn't lost during
|
|
|
|
a crash. */
|
|
|
|
|
|
|
|
if (!ip->i_di.di_nlink) {
|
|
|
|
ul->ul_ut.ut_inum = ip->i_num;
|
|
|
|
error = gfs2_unlinked_ondisk_add(sdp, ul);
|
|
|
|
if (!error)
|
|
|
|
set_bit(GLF_STICKY, &ip->i_gl->gl_flags);
|
|
|
|
}
|
|
|
|
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* gfs2_rmdiri - Remove a directory
|
|
|
|
* @dip: The parent directory of the directory to be removed
|
|
|
|
* @name: The name of the directory to be removed
|
|
|
|
* @ip: The GFS2 inode of the directory to be removed
|
|
|
|
*
|
|
|
|
* Assumes Glocks on dip and ip are held
|
|
|
|
*
|
|
|
|
* Returns: errno
|
|
|
|
*/
|
|
|
|
|
|
|
|
int gfs2_rmdiri(struct gfs2_inode *dip, struct qstr *name,
|
|
|
|
struct gfs2_inode *ip, struct gfs2_unlinked *ul)
|
|
|
|
{
|
|
|
|
struct gfs2_sbd *sdp = dip->i_sbd;
|
|
|
|
struct qstr dotname;
|
|
|
|
int error;
|
|
|
|
|
|
|
|
if (ip->i_di.di_entries != 2) {
|
|
|
|
if (gfs2_consist_inode(ip))
|
|
|
|
gfs2_dinode_print(&ip->i_di);
|
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
|
|
|
|
error = gfs2_dir_del(dip, name);
|
|
|
|
if (error)
|
|
|
|
return error;
|
|
|
|
|
|
|
|
error = gfs2_change_nlink(dip, -1);
|
|
|
|
if (error)
|
|
|
|
return error;
|
|
|
|
|
2006-03-29 03:14:04 +08:00
|
|
|
gfs2_str2qstr(&dotname, ".");
|
2006-01-17 00:50:04 +08:00
|
|
|
error = gfs2_dir_del(ip, &dotname);
|
|
|
|
if (error)
|
|
|
|
return error;
|
|
|
|
|
|
|
|
dotname.len = 2;
|
|
|
|
dotname.name = "..";
|
2006-03-21 01:30:04 +08:00
|
|
|
dotname.hash = gfs2_disk_hash(dotname.name, dotname.len);
|
2006-01-17 00:50:04 +08:00
|
|
|
error = gfs2_dir_del(ip, &dotname);
|
|
|
|
if (error)
|
|
|
|
return error;
|
|
|
|
|
|
|
|
error = gfs2_change_nlink(ip, -2);
|
|
|
|
if (error)
|
|
|
|
return error;
|
|
|
|
|
|
|
|
/* This inode is being unlinked from the directory structure and
|
|
|
|
we need to mark that in the log so that it isn't lost during
|
|
|
|
a crash. */
|
|
|
|
|
|
|
|
ul->ul_ut.ut_inum = ip->i_num;
|
|
|
|
error = gfs2_unlinked_ondisk_add(sdp, ul);
|
|
|
|
if (!error)
|
|
|
|
set_bit(GLF_STICKY, &ip->i_gl->gl_flags);
|
|
|
|
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* gfs2_unlink_ok - check to see that a inode is still in a directory
|
|
|
|
* @dip: the directory
|
|
|
|
* @name: the name of the file
|
|
|
|
* @ip: the inode
|
|
|
|
*
|
|
|
|
* Assumes that the lock on (at least) @dip is held.
|
|
|
|
*
|
|
|
|
* Returns: 0 if the parent/child relationship is correct, errno if it isn't
|
|
|
|
*/
|
|
|
|
|
|
|
|
int gfs2_unlink_ok(struct gfs2_inode *dip, struct qstr *name,
|
|
|
|
struct gfs2_inode *ip)
|
|
|
|
{
|
|
|
|
struct gfs2_inum inum;
|
|
|
|
unsigned int type;
|
|
|
|
int error;
|
|
|
|
|
|
|
|
if (IS_IMMUTABLE(ip->i_vnode) || IS_APPEND(ip->i_vnode))
|
|
|
|
return -EPERM;
|
|
|
|
|
|
|
|
if ((dip->i_di.di_mode & S_ISVTX) &&
|
|
|
|
dip->i_di.di_uid != current->fsuid &&
|
|
|
|
ip->i_di.di_uid != current->fsuid &&
|
|
|
|
!capable(CAP_FOWNER))
|
|
|
|
return -EPERM;
|
|
|
|
|
|
|
|
if (IS_APPEND(dip->i_vnode))
|
|
|
|
return -EPERM;
|
|
|
|
|
|
|
|
error = gfs2_repermission(dip->i_vnode, MAY_WRITE | MAY_EXEC, NULL);
|
|
|
|
if (error)
|
|
|
|
return error;
|
|
|
|
|
2006-03-21 01:30:04 +08:00
|
|
|
error = gfs2_dir_search(dip->i_vnode, name, &inum, &type);
|
2006-01-17 00:50:04 +08:00
|
|
|
if (error)
|
|
|
|
return error;
|
|
|
|
|
|
|
|
if (!gfs2_inum_equal(&inum, &ip->i_num))
|
|
|
|
return -ENOENT;
|
|
|
|
|
|
|
|
if (IF2DT(ip->i_di.di_mode) != type) {
|
|
|
|
gfs2_consist_inode(dip);
|
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* gfs2_ok_to_move - check if it's ok to move a directory to another directory
|
|
|
|
* @this: move this
|
|
|
|
* @to: to here
|
|
|
|
*
|
|
|
|
* Follow @to back to the root and make sure we don't encounter @this
|
|
|
|
* Assumes we already hold the rename lock.
|
|
|
|
*
|
|
|
|
* Returns: errno
|
|
|
|
*/
|
|
|
|
|
|
|
|
int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to)
|
|
|
|
{
|
2006-02-13 20:27:43 +08:00
|
|
|
struct inode *dir = to->i_vnode;
|
2006-03-02 04:31:02 +08:00
|
|
|
struct super_block *sb = dir->i_sb;
|
2006-02-13 20:27:43 +08:00
|
|
|
struct inode *tmp;
|
2006-01-17 00:50:04 +08:00
|
|
|
struct qstr dotdot;
|
|
|
|
int error = 0;
|
|
|
|
|
2006-03-29 03:14:04 +08:00
|
|
|
gfs2_str2qstr(&dotdot, "..");
|
2006-01-17 00:50:04 +08:00
|
|
|
|
2006-02-13 20:27:43 +08:00
|
|
|
igrab(dir);
|
2006-01-17 00:50:04 +08:00
|
|
|
|
|
|
|
for (;;) {
|
2006-02-13 20:27:43 +08:00
|
|
|
if (dir == this->i_vnode) {
|
2006-01-17 00:50:04 +08:00
|
|
|
error = -EINVAL;
|
|
|
|
break;
|
|
|
|
}
|
2006-03-02 04:31:02 +08:00
|
|
|
if (dir == sb->s_root->d_inode) {
|
2006-01-17 00:50:04 +08:00
|
|
|
error = 0;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2006-03-21 01:30:04 +08:00
|
|
|
tmp = gfs2_lookupi(dir, &dotdot, 1, NULL);
|
|
|
|
if (IS_ERR(tmp)) {
|
|
|
|
error = PTR_ERR(tmp);
|
2006-01-17 00:50:04 +08:00
|
|
|
break;
|
2006-03-21 01:30:04 +08:00
|
|
|
}
|
2006-01-17 00:50:04 +08:00
|
|
|
|
2006-02-13 20:27:43 +08:00
|
|
|
iput(dir);
|
|
|
|
dir = tmp;
|
2006-01-17 00:50:04 +08:00
|
|
|
}
|
|
|
|
|
2006-02-13 20:27:43 +08:00
|
|
|
iput(dir);
|
2006-01-17 00:50:04 +08:00
|
|
|
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* gfs2_readlinki - return the contents of a symlink
|
|
|
|
* @ip: the symlink's inode
|
|
|
|
* @buf: a pointer to the buffer to be filled
|
|
|
|
* @len: a pointer to the length of @buf
|
|
|
|
*
|
|
|
|
* If @buf is too small, a piece of memory is kmalloc()ed and needs
|
|
|
|
* to be freed by the caller.
|
|
|
|
*
|
|
|
|
* Returns: errno
|
|
|
|
*/
|
|
|
|
|
|
|
|
int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len)
|
|
|
|
{
|
|
|
|
struct gfs2_holder i_gh;
|
|
|
|
struct buffer_head *dibh;
|
|
|
|
unsigned int x;
|
|
|
|
int error;
|
|
|
|
|
|
|
|
gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &i_gh);
|
|
|
|
error = gfs2_glock_nq_atime(&i_gh);
|
|
|
|
if (error) {
|
|
|
|
gfs2_holder_uninit(&i_gh);
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!ip->i_di.di_size) {
|
|
|
|
gfs2_consist_inode(ip);
|
|
|
|
error = -EIO;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
error = gfs2_meta_inode_buffer(ip, &dibh);
|
|
|
|
if (error)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
x = ip->i_di.di_size + 1;
|
|
|
|
if (x > *len) {
|
|
|
|
*buf = kmalloc(x, GFP_KERNEL);
|
|
|
|
if (!*buf) {
|
|
|
|
error = -ENOMEM;
|
|
|
|
goto out_brelse;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
memcpy(*buf, dibh->b_data + sizeof(struct gfs2_dinode), x);
|
|
|
|
*len = x;
|
|
|
|
|
|
|
|
out_brelse:
|
|
|
|
brelse(dibh);
|
|
|
|
|
|
|
|
out:
|
|
|
|
gfs2_glock_dq_uninit(&i_gh);
|
|
|
|
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* gfs2_glock_nq_atime - Acquire a hold on an inode's glock, and
|
|
|
|
* conditionally update the inode's atime
|
|
|
|
* @gh: the holder to acquire
|
|
|
|
*
|
|
|
|
* Tests atime (access time) for gfs2_read, gfs2_readdir and gfs2_mmap
|
|
|
|
* Update if the difference between the current time and the inode's current
|
|
|
|
* atime is greater than an interval specified at mount.
|
|
|
|
*
|
|
|
|
* Returns: errno
|
|
|
|
*/
|
|
|
|
|
|
|
|
int gfs2_glock_nq_atime(struct gfs2_holder *gh)
|
|
|
|
{
|
|
|
|
struct gfs2_glock *gl = gh->gh_gl;
|
|
|
|
struct gfs2_sbd *sdp = gl->gl_sbd;
|
2006-02-28 06:23:27 +08:00
|
|
|
struct gfs2_inode *ip = gl->gl_object;
|
2006-01-17 00:50:04 +08:00
|
|
|
int64_t curtime, quantum = gfs2_tune_get(sdp, gt_atime_quantum);
|
|
|
|
unsigned int state;
|
|
|
|
int flags;
|
|
|
|
int error;
|
|
|
|
|
|
|
|
if (gfs2_assert_warn(sdp, gh->gh_flags & GL_ATIME) ||
|
|
|
|
gfs2_assert_warn(sdp, !(gh->gh_flags & GL_ASYNC)) ||
|
|
|
|
gfs2_assert_warn(sdp, gl->gl_ops == &gfs2_inode_glops))
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
state = gh->gh_state;
|
|
|
|
flags = gh->gh_flags;
|
|
|
|
|
|
|
|
error = gfs2_glock_nq(gh);
|
|
|
|
if (error)
|
|
|
|
return error;
|
|
|
|
|
|
|
|
if (test_bit(SDF_NOATIME, &sdp->sd_flags) ||
|
|
|
|
(sdp->sd_vfs->s_flags & MS_RDONLY))
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
curtime = get_seconds();
|
|
|
|
if (curtime - ip->i_di.di_atime >= quantum) {
|
|
|
|
gfs2_glock_dq(gh);
|
|
|
|
gfs2_holder_reinit(LM_ST_EXCLUSIVE,
|
|
|
|
gh->gh_flags & ~LM_FLAG_ANY,
|
|
|
|
gh);
|
|
|
|
error = gfs2_glock_nq(gh);
|
|
|
|
if (error)
|
|
|
|
return error;
|
|
|
|
|
|
|
|
/* Verify that atime hasn't been updated while we were
|
|
|
|
trying to get exclusive lock. */
|
|
|
|
|
|
|
|
curtime = get_seconds();
|
|
|
|
if (curtime - ip->i_di.di_atime >= quantum) {
|
|
|
|
struct buffer_head *dibh;
|
|
|
|
|
|
|
|
error = gfs2_trans_begin(sdp, RES_DINODE, 0);
|
|
|
|
if (error == -EROFS)
|
|
|
|
return 0;
|
|
|
|
if (error)
|
|
|
|
goto fail;
|
|
|
|
|
|
|
|
error = gfs2_meta_inode_buffer(ip, &dibh);
|
|
|
|
if (error)
|
|
|
|
goto fail_end_trans;
|
|
|
|
|
|
|
|
ip->i_di.di_atime = curtime;
|
|
|
|
|
2006-01-18 19:19:28 +08:00
|
|
|
gfs2_trans_add_bh(ip->i_gl, dibh, 1);
|
2006-01-17 00:50:04 +08:00
|
|
|
gfs2_dinode_out(&ip->i_di, dibh->b_data);
|
|
|
|
brelse(dibh);
|
|
|
|
|
|
|
|
gfs2_trans_end(sdp);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* If someone else has asked for the glock,
|
|
|
|
unlock and let them have it. Then reacquire
|
|
|
|
in the original state. */
|
|
|
|
if (gfs2_glock_is_blocking(gl)) {
|
|
|
|
gfs2_glock_dq(gh);
|
|
|
|
gfs2_holder_reinit(state, flags, gh);
|
|
|
|
return gfs2_glock_nq(gh);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
fail_end_trans:
|
|
|
|
gfs2_trans_end(sdp);
|
|
|
|
|
|
|
|
fail:
|
|
|
|
gfs2_glock_dq(gh);
|
|
|
|
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* glock_compare_atime - Compare two struct gfs2_glock structures for sort
|
|
|
|
* @arg_a: the first structure
|
|
|
|
* @arg_b: the second structure
|
|
|
|
*
|
|
|
|
* Returns: 1 if A > B
|
|
|
|
* -1 if A < B
|
|
|
|
* 0 if A = B
|
|
|
|
*/
|
|
|
|
|
|
|
|
static int glock_compare_atime(const void *arg_a, const void *arg_b)
|
|
|
|
{
|
|
|
|
struct gfs2_holder *gh_a = *(struct gfs2_holder **)arg_a;
|
|
|
|
struct gfs2_holder *gh_b = *(struct gfs2_holder **)arg_b;
|
|
|
|
struct lm_lockname *a = &gh_a->gh_gl->gl_name;
|
|
|
|
struct lm_lockname *b = &gh_b->gh_gl->gl_name;
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
if (a->ln_number > b->ln_number)
|
|
|
|
ret = 1;
|
|
|
|
else if (a->ln_number < b->ln_number)
|
|
|
|
ret = -1;
|
|
|
|
else {
|
|
|
|
if (gh_a->gh_state == LM_ST_SHARED &&
|
|
|
|
gh_b->gh_state == LM_ST_EXCLUSIVE)
|
|
|
|
ret = 1;
|
|
|
|
else if (gh_a->gh_state == LM_ST_SHARED &&
|
|
|
|
(gh_b->gh_flags & GL_ATIME))
|
|
|
|
ret = 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* gfs2_glock_nq_m_atime - acquire multiple glocks where one may need an
|
|
|
|
* atime update
|
|
|
|
* @num_gh: the number of structures
|
|
|
|
* @ghs: an array of struct gfs2_holder structures
|
|
|
|
*
|
|
|
|
* Returns: 0 on success (all glocks acquired),
|
|
|
|
* errno on failure (no glocks acquired)
|
|
|
|
*/
|
|
|
|
|
|
|
|
int gfs2_glock_nq_m_atime(unsigned int num_gh, struct gfs2_holder *ghs)
|
|
|
|
{
|
|
|
|
struct gfs2_holder **p;
|
|
|
|
unsigned int x;
|
|
|
|
int error = 0;
|
|
|
|
|
|
|
|
if (!num_gh)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
if (num_gh == 1) {
|
|
|
|
ghs->gh_flags &= ~(LM_FLAG_TRY | GL_ASYNC);
|
|
|
|
if (ghs->gh_flags & GL_ATIME)
|
|
|
|
error = gfs2_glock_nq_atime(ghs);
|
|
|
|
else
|
|
|
|
error = gfs2_glock_nq(ghs);
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
p = kcalloc(num_gh, sizeof(struct gfs2_holder *), GFP_KERNEL);
|
|
|
|
if (!p)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
for (x = 0; x < num_gh; x++)
|
|
|
|
p[x] = &ghs[x];
|
|
|
|
|
|
|
|
sort(p, num_gh, sizeof(struct gfs2_holder *), glock_compare_atime,NULL);
|
|
|
|
|
|
|
|
for (x = 0; x < num_gh; x++) {
|
|
|
|
p[x]->gh_flags &= ~(LM_FLAG_TRY | GL_ASYNC);
|
|
|
|
|
|
|
|
if (p[x]->gh_flags & GL_ATIME)
|
|
|
|
error = gfs2_glock_nq_atime(p[x]);
|
|
|
|
else
|
|
|
|
error = gfs2_glock_nq(p[x]);
|
|
|
|
|
|
|
|
if (error) {
|
|
|
|
while (x--)
|
|
|
|
gfs2_glock_dq(p[x]);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
kfree(p);
|
|
|
|
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* gfs2_try_toss_vnode - See if we can toss a vnode from memory
|
|
|
|
* @ip: the inode
|
|
|
|
*
|
|
|
|
* Returns: 1 if the vnode was tossed
|
|
|
|
*/
|
|
|
|
|
|
|
|
void gfs2_try_toss_vnode(struct gfs2_inode *ip)
|
|
|
|
{
|
|
|
|
struct inode *inode;
|
|
|
|
|
|
|
|
inode = gfs2_ip2v_lookup(ip);
|
|
|
|
if (!inode)
|
|
|
|
return;
|
|
|
|
|
|
|
|
d_prune_aliases(inode);
|
|
|
|
|
|
|
|
if (S_ISDIR(ip->i_di.di_mode)) {
|
|
|
|
struct list_head *head = &inode->i_dentry;
|
|
|
|
struct dentry *d = NULL;
|
|
|
|
|
|
|
|
spin_lock(&dcache_lock);
|
|
|
|
if (list_empty(head))
|
|
|
|
spin_unlock(&dcache_lock);
|
|
|
|
else {
|
|
|
|
d = list_entry(head->next, struct dentry, d_alias);
|
|
|
|
dget_locked(d);
|
|
|
|
spin_unlock(&dcache_lock);
|
|
|
|
|
|
|
|
if (have_submounts(d))
|
|
|
|
dput(d);
|
|
|
|
else {
|
|
|
|
shrink_dcache_parent(d);
|
|
|
|
dput(d);
|
|
|
|
d_prune_aliases(inode);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
inode->i_nlink = 0;
|
|
|
|
iput(inode);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
__gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr)
|
|
|
|
{
|
|
|
|
struct buffer_head *dibh;
|
|
|
|
int error;
|
|
|
|
|
|
|
|
error = gfs2_meta_inode_buffer(ip, &dibh);
|
|
|
|
if (!error) {
|
|
|
|
error = inode_setattr(ip->i_vnode, attr);
|
|
|
|
gfs2_assert_warn(ip->i_sbd, !error);
|
|
|
|
gfs2_inode_attr_out(ip);
|
|
|
|
|
2006-01-18 19:19:28 +08:00
|
|
|
gfs2_trans_add_bh(ip->i_gl, dibh, 1);
|
2006-01-17 00:50:04 +08:00
|
|
|
gfs2_dinode_out(&ip->i_di, dibh->b_data);
|
|
|
|
brelse(dibh);
|
|
|
|
}
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* gfs2_setattr_simple -
|
|
|
|
* @ip:
|
|
|
|
* @attr:
|
|
|
|
*
|
|
|
|
* Called with a reference on the vnode.
|
|
|
|
*
|
|
|
|
* Returns: errno
|
|
|
|
*/
|
|
|
|
|
|
|
|
int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr)
|
|
|
|
{
|
|
|
|
int error;
|
|
|
|
|
2006-02-28 06:23:27 +08:00
|
|
|
if (current->journal_info)
|
2006-01-17 00:50:04 +08:00
|
|
|
return __gfs2_setattr_simple(ip, attr);
|
|
|
|
|
|
|
|
error = gfs2_trans_begin(ip->i_sbd, RES_DINODE, 0);
|
|
|
|
if (error)
|
|
|
|
return error;
|
|
|
|
|
|
|
|
error = __gfs2_setattr_simple(ip, attr);
|
|
|
|
|
|
|
|
gfs2_trans_end(ip->i_sbd);
|
|
|
|
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
int gfs2_repermission(struct inode *inode, int mask, struct nameidata *nd)
|
|
|
|
{
|
|
|
|
return permission(inode, mask, nd);
|
|
|
|
}
|
|
|
|
|