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1449 lines
34 KiB
1449 lines
34 KiB
/*
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* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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* Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU General Public License version 2.
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*/
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/completion.h>
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#include <linux/buffer_head.h>
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#include <linux/posix_acl.h>
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#include <linux/sort.h>
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#include <linux/gfs2_ondisk.h>
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#include <linux/crc32.h>
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#include <linux/lm_interface.h>
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#include <linux/security.h>
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#include "gfs2.h"
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#include "incore.h"
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#include "acl.h"
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#include "bmap.h"
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#include "dir.h"
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#include "eattr.h"
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#include "glock.h"
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#include "glops.h"
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#include "inode.h"
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#include "log.h"
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#include "meta_io.h"
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#include "ops_address.h"
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#include "ops_inode.h"
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#include "quota.h"
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#include "rgrp.h"
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#include "trans.h"
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#include "util.h"
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struct gfs2_inum_range_host {
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u64 ir_start;
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u64 ir_length;
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};
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static int iget_test(struct inode *inode, void *opaque)
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{
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struct gfs2_inode *ip = GFS2_I(inode);
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u64 *no_addr = opaque;
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if (ip->i_no_addr == *no_addr &&
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inode->i_private != NULL)
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return 1;
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return 0;
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}
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static int iget_set(struct inode *inode, void *opaque)
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{
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struct gfs2_inode *ip = GFS2_I(inode);
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u64 *no_addr = opaque;
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inode->i_ino = (unsigned long)*no_addr;
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ip->i_no_addr = *no_addr;
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return 0;
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}
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struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr)
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{
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unsigned long hash = (unsigned long)no_addr;
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return ilookup5(sb, hash, iget_test, &no_addr);
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}
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static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr)
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{
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unsigned long hash = (unsigned long)no_addr;
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return iget5_locked(sb, hash, iget_test, iget_set, &no_addr);
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}
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struct gfs2_skip_data {
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u64 no_addr;
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int skipped;
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};
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static int iget_skip_test(struct inode *inode, void *opaque)
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{
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struct gfs2_inode *ip = GFS2_I(inode);
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struct gfs2_skip_data *data = opaque;
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if (ip->i_no_addr == data->no_addr && inode->i_private != NULL){
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if (inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE)){
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data->skipped = 1;
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return 0;
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}
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return 1;
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}
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return 0;
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}
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static int iget_skip_set(struct inode *inode, void *opaque)
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{
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struct gfs2_inode *ip = GFS2_I(inode);
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struct gfs2_skip_data *data = opaque;
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if (data->skipped)
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return 1;
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inode->i_ino = (unsigned long)(data->no_addr);
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ip->i_no_addr = data->no_addr;
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return 0;
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}
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static struct inode *gfs2_iget_skip(struct super_block *sb,
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u64 no_addr)
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{
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struct gfs2_skip_data data;
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unsigned long hash = (unsigned long)no_addr;
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data.no_addr = no_addr;
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data.skipped = 0;
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return iget5_locked(sb, hash, iget_skip_test, iget_skip_set, &data);
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}
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/**
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* GFS2 lookup code fills in vfs inode contents based on info obtained
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* from directory entry inside gfs2_inode_lookup(). This has caused issues
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* with NFS code path since its get_dentry routine doesn't have the relevant
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* directory entry when gfs2_inode_lookup() is invoked. Part of the code
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* segment inside gfs2_inode_lookup code needs to get moved around.
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*
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* Clean up I_LOCK and I_NEW as well.
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**/
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void gfs2_set_iop(struct inode *inode)
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{
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struct gfs2_sbd *sdp = GFS2_SB(inode);
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umode_t mode = inode->i_mode;
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if (S_ISREG(mode)) {
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inode->i_op = &gfs2_file_iops;
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if (sdp->sd_args.ar_localflocks)
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inode->i_fop = &gfs2_file_fops_nolock;
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else
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inode->i_fop = &gfs2_file_fops;
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} else if (S_ISDIR(mode)) {
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inode->i_op = &gfs2_dir_iops;
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if (sdp->sd_args.ar_localflocks)
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inode->i_fop = &gfs2_dir_fops_nolock;
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else
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inode->i_fop = &gfs2_dir_fops;
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} else if (S_ISLNK(mode)) {
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inode->i_op = &gfs2_symlink_iops;
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} else {
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inode->i_op = &gfs2_file_iops;
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init_special_inode(inode, inode->i_mode, inode->i_rdev);
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}
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unlock_new_inode(inode);
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}
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/**
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* gfs2_inode_lookup - Lookup an inode
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* @sb: The super block
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* @no_addr: The inode number
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* @type: The type of the inode
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* @skip_freeing: set this not return an inode if it is currently being freed.
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*
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* Returns: A VFS inode, or an error
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*/
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struct inode *gfs2_inode_lookup(struct super_block *sb,
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unsigned int type,
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u64 no_addr,
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u64 no_formal_ino, int skip_freeing)
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{
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struct inode *inode;
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struct gfs2_inode *ip;
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struct gfs2_glock *io_gl;
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int error;
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if (skip_freeing)
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inode = gfs2_iget_skip(sb, no_addr);
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else
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inode = gfs2_iget(sb, no_addr);
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ip = GFS2_I(inode);
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if (!inode)
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return ERR_PTR(-ENOBUFS);
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if (inode->i_state & I_NEW) {
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struct gfs2_sbd *sdp = GFS2_SB(inode);
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inode->i_private = ip;
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ip->i_no_formal_ino = no_formal_ino;
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error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
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if (unlikely(error))
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goto fail;
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ip->i_gl->gl_object = ip;
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error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
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if (unlikely(error))
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goto fail_put;
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set_bit(GIF_INVALID, &ip->i_flags);
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error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
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if (unlikely(error))
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goto fail_iopen;
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ip->i_iopen_gh.gh_gl->gl_object = ip;
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gfs2_glock_put(io_gl);
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if ((type == DT_UNKNOWN) && (no_formal_ino == 0))
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goto gfs2_nfsbypass;
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inode->i_mode = DT2IF(type);
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/*
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* We must read the inode in order to work out its type in
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* this case. Note that this doesn't happen often as we normally
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* know the type beforehand. This code path only occurs during
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* unlinked inode recovery (where it is safe to do this glock,
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* which is not true in the general case).
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*/
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if (type == DT_UNKNOWN) {
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struct gfs2_holder gh;
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error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
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if (unlikely(error))
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goto fail_glock;
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/* Inode is now uptodate */
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gfs2_glock_dq_uninit(&gh);
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}
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gfs2_set_iop(inode);
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}
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gfs2_nfsbypass:
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return inode;
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fail_glock:
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gfs2_glock_dq(&ip->i_iopen_gh);
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fail_iopen:
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gfs2_glock_put(io_gl);
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fail_put:
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ip->i_gl->gl_object = NULL;
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gfs2_glock_put(ip->i_gl);
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fail:
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iget_failed(inode);
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return ERR_PTR(error);
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}
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static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
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{
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struct gfs2_dinode_host *di = &ip->i_di;
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const struct gfs2_dinode *str = buf;
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u16 height, depth;
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if (unlikely(ip->i_no_addr != be64_to_cpu(str->di_num.no_addr)))
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goto corrupt;
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ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino);
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ip->i_inode.i_mode = be32_to_cpu(str->di_mode);
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ip->i_inode.i_rdev = 0;
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switch (ip->i_inode.i_mode & S_IFMT) {
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case S_IFBLK:
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case S_IFCHR:
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ip->i_inode.i_rdev = MKDEV(be32_to_cpu(str->di_major),
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be32_to_cpu(str->di_minor));
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break;
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};
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ip->i_inode.i_uid = be32_to_cpu(str->di_uid);
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ip->i_inode.i_gid = be32_to_cpu(str->di_gid);
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/*
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* We will need to review setting the nlink count here in the
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* light of the forthcoming ro bind mount work. This is a reminder
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* to do that.
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*/
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ip->i_inode.i_nlink = be32_to_cpu(str->di_nlink);
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di->di_size = be64_to_cpu(str->di_size);
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i_size_write(&ip->i_inode, di->di_size);
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gfs2_set_inode_blocks(&ip->i_inode, be64_to_cpu(str->di_blocks));
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ip->i_inode.i_atime.tv_sec = be64_to_cpu(str->di_atime);
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ip->i_inode.i_atime.tv_nsec = be32_to_cpu(str->di_atime_nsec);
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ip->i_inode.i_mtime.tv_sec = be64_to_cpu(str->di_mtime);
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ip->i_inode.i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec);
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ip->i_inode.i_ctime.tv_sec = be64_to_cpu(str->di_ctime);
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ip->i_inode.i_ctime.tv_nsec = be32_to_cpu(str->di_ctime_nsec);
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ip->i_goal = be64_to_cpu(str->di_goal_meta);
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di->di_generation = be64_to_cpu(str->di_generation);
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di->di_flags = be32_to_cpu(str->di_flags);
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gfs2_set_inode_flags(&ip->i_inode);
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height = be16_to_cpu(str->di_height);
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if (unlikely(height > GFS2_MAX_META_HEIGHT))
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goto corrupt;
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ip->i_height = (u8)height;
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|
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depth = be16_to_cpu(str->di_depth);
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if (unlikely(depth > GFS2_DIR_MAX_DEPTH))
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goto corrupt;
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ip->i_depth = (u8)depth;
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di->di_entries = be32_to_cpu(str->di_entries);
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di->di_eattr = be64_to_cpu(str->di_eattr);
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if (S_ISREG(ip->i_inode.i_mode))
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gfs2_set_aops(&ip->i_inode);
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return 0;
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corrupt:
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if (gfs2_consist_inode(ip))
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gfs2_dinode_print(ip);
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return -EIO;
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}
|
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|
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/**
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* gfs2_inode_refresh - Refresh the incore copy of the dinode
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* @ip: The GFS2 inode
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*
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* Returns: errno
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*/
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|
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int gfs2_inode_refresh(struct gfs2_inode *ip)
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{
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struct buffer_head *dibh;
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int error;
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error = gfs2_meta_inode_buffer(ip, &dibh);
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if (error)
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return error;
|
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|
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if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), dibh, GFS2_METATYPE_DI)) {
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brelse(dibh);
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return -EIO;
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}
|
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error = gfs2_dinode_in(ip, dibh->b_data);
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brelse(dibh);
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clear_bit(GIF_INVALID, &ip->i_flags);
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return error;
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}
|
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|
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int gfs2_dinode_dealloc(struct gfs2_inode *ip)
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{
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struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
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struct gfs2_alloc *al;
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struct gfs2_rgrpd *rgd;
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int error;
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|
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if (gfs2_get_inode_blocks(&ip->i_inode) != 1) {
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if (gfs2_consist_inode(ip))
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gfs2_dinode_print(ip);
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return -EIO;
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}
|
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al = gfs2_alloc_get(ip);
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if (!al)
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return -ENOMEM;
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|
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error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
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if (error)
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goto out;
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error = gfs2_rindex_hold(sdp, &al->al_ri_gh);
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if (error)
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goto out_qs;
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rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr);
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if (!rgd) {
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gfs2_consist_inode(ip);
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error = -EIO;
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goto out_rindex_relse;
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}
|
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|
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error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0,
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&al->al_rgd_gh);
|
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if (error)
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goto out_rindex_relse;
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|
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error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA, 1);
|
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if (error)
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goto out_rg_gunlock;
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|
|
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set_bit(GLF_DIRTY, &ip->i_gl->gl_flags);
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set_bit(GLF_LFLUSH, &ip->i_gl->gl_flags);
|
|
|
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gfs2_free_di(rgd, ip);
|
|
|
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gfs2_trans_end(sdp);
|
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clear_bit(GLF_STICKY, &ip->i_gl->gl_flags);
|
|
|
|
out_rg_gunlock:
|
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gfs2_glock_dq_uninit(&al->al_rgd_gh);
|
|
out_rindex_relse:
|
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gfs2_glock_dq_uninit(&al->al_ri_gh);
|
|
out_qs:
|
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gfs2_quota_unhold(ip);
|
|
out:
|
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gfs2_alloc_put(ip);
|
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return error;
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
u32 nlink;
|
|
int error;
|
|
|
|
BUG_ON(diff != 1 && diff != -1);
|
|
nlink = ip->i_inode.i_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_inode.i_nlink) {
|
|
if (gfs2_consist_inode(ip))
|
|
gfs2_dinode_print(ip);
|
|
return -EIO;
|
|
}
|
|
|
|
error = gfs2_meta_inode_buffer(ip, &dibh);
|
|
if (error)
|
|
return error;
|
|
|
|
if (diff > 0)
|
|
inc_nlink(&ip->i_inode);
|
|
else
|
|
drop_nlink(&ip->i_inode);
|
|
|
|
ip->i_inode.i_ctime = CURRENT_TIME;
|
|
|
|
gfs2_trans_add_bh(ip->i_gl, dibh, 1);
|
|
gfs2_dinode_out(ip, dibh->b_data);
|
|
brelse(dibh);
|
|
mark_inode_dirty(&ip->i_inode);
|
|
|
|
if (ip->i_inode.i_nlink == 0)
|
|
gfs2_unlink_di(&ip->i_inode); /* mark inode unlinked */
|
|
|
|
return error;
|
|
}
|
|
|
|
struct inode *gfs2_lookup_simple(struct inode *dip, const char *name)
|
|
{
|
|
struct qstr qstr;
|
|
struct inode *inode;
|
|
gfs2_str2qstr(&qstr, name);
|
|
inode = gfs2_lookupi(dip, &qstr, 1, NULL);
|
|
/* gfs2_lookupi has inconsistent callers: vfs
|
|
* related routines expect NULL for no entry found,
|
|
* gfs2_lookup_simple callers expect ENOENT
|
|
* and do not check for NULL.
|
|
*/
|
|
if (inode == NULL)
|
|
return ERR_PTR(-ENOENT);
|
|
else
|
|
return inode;
|
|
}
|
|
|
|
|
|
/**
|
|
* 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
|
|
*
|
|
* This can be called via the VFS filldir function when NFS is doing
|
|
* a readdirplus and the inode which its intending to stat isn't
|
|
* already in cache. In this case we must not take the directory glock
|
|
* again, since the readdir call will have already taken that lock.
|
|
*
|
|
* Returns: errno
|
|
*/
|
|
|
|
struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
|
|
int is_root, struct nameidata *nd)
|
|
{
|
|
struct super_block *sb = dir->i_sb;
|
|
struct gfs2_inode *dip = GFS2_I(dir);
|
|
struct gfs2_holder d_gh;
|
|
int error = 0;
|
|
struct inode *inode = NULL;
|
|
int unlock = 0;
|
|
|
|
if (!name->len || name->len > GFS2_FNAMESIZE)
|
|
return ERR_PTR(-ENAMETOOLONG);
|
|
|
|
if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) ||
|
|
(name->len == 2 && memcmp(name->name, "..", 2) == 0 &&
|
|
dir == sb->s_root->d_inode)) {
|
|
igrab(dir);
|
|
return dir;
|
|
}
|
|
|
|
if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) {
|
|
error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
|
|
if (error)
|
|
return ERR_PTR(error);
|
|
unlock = 1;
|
|
}
|
|
|
|
if (!is_root) {
|
|
error = permission(dir, MAY_EXEC, NULL);
|
|
if (error)
|
|
goto out;
|
|
}
|
|
|
|
inode = gfs2_dir_search(dir, name);
|
|
if (IS_ERR(inode))
|
|
error = PTR_ERR(inode);
|
|
out:
|
|
if (unlock)
|
|
gfs2_glock_dq_uninit(&d_gh);
|
|
if (error == -ENOENT)
|
|
return NULL;
|
|
return inode ? inode : ERR_PTR(error);
|
|
}
|
|
|
|
static void gfs2_inum_range_in(struct gfs2_inum_range_host *ir, const void *buf)
|
|
{
|
|
const struct gfs2_inum_range *str = buf;
|
|
|
|
ir->ir_start = be64_to_cpu(str->ir_start);
|
|
ir->ir_length = be64_to_cpu(str->ir_length);
|
|
}
|
|
|
|
static void gfs2_inum_range_out(const struct gfs2_inum_range_host *ir, void *buf)
|
|
{
|
|
struct gfs2_inum_range *str = buf;
|
|
|
|
str->ir_start = cpu_to_be64(ir->ir_start);
|
|
str->ir_length = cpu_to_be64(ir->ir_length);
|
|
}
|
|
|
|
static int pick_formal_ino_1(struct gfs2_sbd *sdp, u64 *formal_ino)
|
|
{
|
|
struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode);
|
|
struct buffer_head *bh;
|
|
struct gfs2_inum_range_host ir;
|
|
int error;
|
|
|
|
error = gfs2_trans_begin(sdp, RES_DINODE, 0);
|
|
if (error)
|
|
return error;
|
|
mutex_lock(&sdp->sd_inum_mutex);
|
|
|
|
error = gfs2_meta_inode_buffer(ip, &bh);
|
|
if (error) {
|
|
mutex_unlock(&sdp->sd_inum_mutex);
|
|
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--;
|
|
gfs2_trans_add_bh(ip->i_gl, bh, 1);
|
|
gfs2_inum_range_out(&ir,
|
|
bh->b_data + sizeof(struct gfs2_dinode));
|
|
brelse(bh);
|
|
mutex_unlock(&sdp->sd_inum_mutex);
|
|
gfs2_trans_end(sdp);
|
|
return 0;
|
|
}
|
|
|
|
brelse(bh);
|
|
|
|
mutex_unlock(&sdp->sd_inum_mutex);
|
|
gfs2_trans_end(sdp);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int pick_formal_ino_2(struct gfs2_sbd *sdp, u64 *formal_ino)
|
|
{
|
|
struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode);
|
|
struct gfs2_inode *m_ip = GFS2_I(sdp->sd_inum_inode);
|
|
struct gfs2_holder gh;
|
|
struct buffer_head *bh;
|
|
struct gfs2_inum_range_host 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;
|
|
mutex_lock(&sdp->sd_inum_mutex);
|
|
|
|
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;
|
|
u64 x, y;
|
|
__be64 z;
|
|
|
|
error = gfs2_meta_inode_buffer(m_ip, &m_bh);
|
|
if (error)
|
|
goto out_brelse;
|
|
|
|
z = *(__be64 *)(m_bh->b_data + sizeof(struct gfs2_dinode));
|
|
x = y = be64_to_cpu(z);
|
|
ir.ir_start = x;
|
|
ir.ir_length = GFS2_INUM_QUANTUM;
|
|
x += GFS2_INUM_QUANTUM;
|
|
if (x < y)
|
|
gfs2_consist_inode(m_ip);
|
|
z = cpu_to_be64(x);
|
|
gfs2_trans_add_bh(m_ip->i_gl, m_bh, 1);
|
|
*(__be64 *)(m_bh->b_data + sizeof(struct gfs2_dinode)) = z;
|
|
|
|
brelse(m_bh);
|
|
}
|
|
|
|
*formal_ino = ir.ir_start++;
|
|
ir.ir_length--;
|
|
|
|
gfs2_trans_add_bh(ip->i_gl, bh, 1);
|
|
gfs2_inum_range_out(&ir, bh->b_data + sizeof(struct gfs2_dinode));
|
|
|
|
out_brelse:
|
|
brelse(bh);
|
|
out_end_trans:
|
|
mutex_unlock(&sdp->sd_inum_mutex);
|
|
gfs2_trans_end(sdp);
|
|
out:
|
|
gfs2_glock_dq_uninit(&gh);
|
|
return error;
|
|
}
|
|
|
|
static int pick_formal_ino(struct gfs2_sbd *sdp, u64 *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, const struct qstr *name,
|
|
unsigned int mode)
|
|
{
|
|
int error;
|
|
|
|
error = permission(&dip->i_inode, MAY_WRITE | MAY_EXEC, NULL);
|
|
if (error)
|
|
return error;
|
|
|
|
/* Don't create entries in an unlinked directory */
|
|
if (!dip->i_inode.i_nlink)
|
|
return -EPERM;
|
|
|
|
error = gfs2_dir_check(&dip->i_inode, name, NULL);
|
|
switch (error) {
|
|
case -ENOENT:
|
|
error = 0;
|
|
break;
|
|
case 0:
|
|
return -EEXIST;
|
|
default:
|
|
return error;
|
|
}
|
|
|
|
if (dip->i_di.di_entries == (u32)-1)
|
|
return -EFBIG;
|
|
if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-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 (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir &&
|
|
(dip->i_inode.i_mode & S_ISUID) && dip->i_inode.i_uid) {
|
|
if (S_ISDIR(*mode))
|
|
*mode |= S_ISUID;
|
|
else if (dip->i_inode.i_uid != current->fsuid)
|
|
*mode &= ~07111;
|
|
*uid = dip->i_inode.i_uid;
|
|
} else
|
|
*uid = current->fsuid;
|
|
|
|
if (dip->i_inode.i_mode & S_ISGID) {
|
|
if (S_ISDIR(*mode))
|
|
*mode |= S_ISGID;
|
|
*gid = dip->i_inode.i_gid;
|
|
} else
|
|
*gid = current->fsgid;
|
|
}
|
|
|
|
static int alloc_dinode(struct gfs2_inode *dip, u64 *no_addr, u64 *generation)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
|
|
int error;
|
|
|
|
if (gfs2_alloc_get(dip) == NULL)
|
|
return -ENOMEM;
|
|
|
|
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_STATFS, 0);
|
|
if (error)
|
|
goto out_ipreserv;
|
|
|
|
*no_addr = gfs2_alloc_di(dip, generation);
|
|
|
|
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,
|
|
const struct gfs2_inum_host *inum, unsigned int mode,
|
|
unsigned int uid, unsigned int gid,
|
|
const u64 *generation, dev_t dev, struct buffer_head **bhp)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
|
|
struct gfs2_dinode *di;
|
|
struct buffer_head *dibh;
|
|
struct timespec tv = CURRENT_TIME;
|
|
|
|
dibh = gfs2_meta_new(gl, inum->no_addr);
|
|
gfs2_trans_add_bh(gl, dibh, 1);
|
|
gfs2_metatype_set(dibh, GFS2_METATYPE_DI, GFS2_FORMAT_DI);
|
|
gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode));
|
|
di = (struct gfs2_dinode *)dibh->b_data;
|
|
|
|
di->di_num.no_formal_ino = cpu_to_be64(inum->no_formal_ino);
|
|
di->di_num.no_addr = cpu_to_be64(inum->no_addr);
|
|
di->di_mode = cpu_to_be32(mode);
|
|
di->di_uid = cpu_to_be32(uid);
|
|
di->di_gid = cpu_to_be32(gid);
|
|
di->di_nlink = 0;
|
|
di->di_size = 0;
|
|
di->di_blocks = cpu_to_be64(1);
|
|
di->di_atime = di->di_mtime = di->di_ctime = cpu_to_be64(tv.tv_sec);
|
|
di->di_major = cpu_to_be32(MAJOR(dev));
|
|
di->di_minor = cpu_to_be32(MINOR(dev));
|
|
di->di_goal_meta = di->di_goal_data = cpu_to_be64(inum->no_addr);
|
|
di->di_generation = cpu_to_be64(*generation);
|
|
di->di_flags = 0;
|
|
|
|
if (S_ISREG(mode)) {
|
|
if ((dip->i_di.di_flags & GFS2_DIF_INHERIT_JDATA) ||
|
|
gfs2_tune_get(sdp, gt_new_files_jdata))
|
|
di->di_flags |= cpu_to_be32(GFS2_DIF_JDATA);
|
|
if ((dip->i_di.di_flags & GFS2_DIF_INHERIT_DIRECTIO) ||
|
|
gfs2_tune_get(sdp, gt_new_files_directio))
|
|
di->di_flags |= cpu_to_be32(GFS2_DIF_DIRECTIO);
|
|
} else if (S_ISDIR(mode)) {
|
|
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);
|
|
}
|
|
|
|
di->__pad1 = 0;
|
|
di->di_payload_format = cpu_to_be32(S_ISDIR(mode) ? GFS2_FORMAT_DE : 0);
|
|
di->di_height = 0;
|
|
di->__pad2 = 0;
|
|
di->__pad3 = 0;
|
|
di->di_depth = 0;
|
|
di->di_entries = 0;
|
|
memset(&di->__pad4, 0, sizeof(di->__pad4));
|
|
di->di_eattr = 0;
|
|
di->di_atime_nsec = cpu_to_be32(tv.tv_nsec);
|
|
di->di_mtime_nsec = cpu_to_be32(tv.tv_nsec);
|
|
di->di_ctime_nsec = cpu_to_be32(tv.tv_nsec);
|
|
memset(&di->di_reserved, 0, sizeof(di->di_reserved));
|
|
|
|
set_buffer_uptodate(dibh);
|
|
|
|
*bhp = dibh;
|
|
}
|
|
|
|
static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
|
|
unsigned int mode, const struct gfs2_inum_host *inum,
|
|
const u64 *generation, dev_t dev, struct buffer_head **bhp)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
|
|
unsigned int uid, gid;
|
|
int error;
|
|
|
|
munge_mode_uid_gid(dip, &mode, &uid, &gid);
|
|
if (!gfs2_alloc_get(dip))
|
|
return -ENOMEM;
|
|
|
|
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_QUOTA, 0);
|
|
if (error)
|
|
goto out_quota;
|
|
|
|
init_dinode(dip, gl, inum, mode, uid, gid, generation, dev, bhp);
|
|
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, const struct qstr *name,
|
|
struct gfs2_inode *ip)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
|
|
struct gfs2_alloc *al;
|
|
int alloc_required;
|
|
struct buffer_head *dibh;
|
|
int error;
|
|
|
|
al = gfs2_alloc_get(dip);
|
|
if (!al)
|
|
return -ENOMEM;
|
|
|
|
error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
|
|
if (error)
|
|
goto fail;
|
|
|
|
error = alloc_required = gfs2_diradd_alloc_required(&dip->i_inode, name);
|
|
if (alloc_required < 0)
|
|
goto fail_quota_locks;
|
|
if (alloc_required) {
|
|
error = gfs2_quota_check(dip, dip->i_inode.i_uid, dip->i_inode.i_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_length +
|
|
2 * RES_DINODE +
|
|
RES_STATFS + RES_QUOTA, 0);
|
|
if (error)
|
|
goto fail_ipreserv;
|
|
} else {
|
|
error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0);
|
|
if (error)
|
|
goto fail_quota_locks;
|
|
}
|
|
|
|
error = gfs2_dir_add(&dip->i_inode, name, ip, IF2DT(ip->i_inode.i_mode));
|
|
if (error)
|
|
goto fail_end_trans;
|
|
|
|
error = gfs2_meta_inode_buffer(ip, &dibh);
|
|
if (error)
|
|
goto fail_end_trans;
|
|
ip->i_inode.i_nlink = 1;
|
|
gfs2_trans_add_bh(ip->i_gl, dibh, 1);
|
|
gfs2_dinode_out(ip, dibh->b_data);
|
|
brelse(dibh);
|
|
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;
|
|
}
|
|
|
|
static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip)
|
|
{
|
|
int err;
|
|
size_t len;
|
|
void *value;
|
|
char *name;
|
|
struct gfs2_ea_request er;
|
|
|
|
err = security_inode_init_security(&ip->i_inode, &dip->i_inode,
|
|
&name, &value, &len);
|
|
|
|
if (err) {
|
|
if (err == -EOPNOTSUPP)
|
|
return 0;
|
|
return err;
|
|
}
|
|
|
|
memset(&er, 0, sizeof(struct gfs2_ea_request));
|
|
|
|
er.er_type = GFS2_EATYPE_SECURITY;
|
|
er.er_name = name;
|
|
er.er_data = value;
|
|
er.er_name_len = strlen(name);
|
|
er.er_data_len = len;
|
|
|
|
err = gfs2_ea_set_i(ip, &er);
|
|
|
|
kfree(value);
|
|
kfree(name);
|
|
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* 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
|
|
*
|
|
* If the return value is not NULL, the glocks on both the directory and the new
|
|
* file are held. A transaction has been started and an inplace reservation
|
|
* is held, as well.
|
|
*
|
|
* Returns: An inode
|
|
*/
|
|
|
|
struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
|
|
unsigned int mode, dev_t dev)
|
|
{
|
|
struct inode *inode = NULL;
|
|
struct gfs2_inode *dip = ghs->gh_gl->gl_object;
|
|
struct inode *dir = &dip->i_inode;
|
|
struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
|
|
struct gfs2_inum_host inum = { .no_addr = 0, .no_formal_ino = 0 };
|
|
int error;
|
|
u64 generation;
|
|
struct buffer_head *bh = NULL;
|
|
|
|
if (!name->len || name->len > GFS2_FNAMESIZE)
|
|
return ERR_PTR(-ENAMETOOLONG);
|
|
|
|
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, &inum.no_formal_ino);
|
|
if (error)
|
|
goto fail_gunlock;
|
|
|
|
error = alloc_dinode(dip, &inum.no_addr, &generation);
|
|
if (error)
|
|
goto fail_gunlock;
|
|
|
|
error = gfs2_glock_nq_num(sdp, 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, &inum, &generation, dev, &bh);
|
|
if (error)
|
|
goto fail_gunlock2;
|
|
|
|
inode = gfs2_inode_lookup(dir->i_sb, IF2DT(mode),
|
|
inum.no_addr,
|
|
inum.no_formal_ino, 0);
|
|
if (IS_ERR(inode))
|
|
goto fail_gunlock2;
|
|
|
|
error = gfs2_inode_refresh(GFS2_I(inode));
|
|
if (error)
|
|
goto fail_gunlock2;
|
|
|
|
error = gfs2_acl_create(dip, GFS2_I(inode));
|
|
if (error)
|
|
goto fail_gunlock2;
|
|
|
|
error = gfs2_security_init(dip, GFS2_I(inode));
|
|
if (error)
|
|
goto fail_gunlock2;
|
|
|
|
error = link_dinode(dip, name, GFS2_I(inode));
|
|
if (error)
|
|
goto fail_gunlock2;
|
|
|
|
if (bh)
|
|
brelse(bh);
|
|
if (!inode)
|
|
return ERR_PTR(-ENOMEM);
|
|
return inode;
|
|
|
|
fail_gunlock2:
|
|
gfs2_glock_dq_uninit(ghs + 1);
|
|
if (inode)
|
|
iput(inode);
|
|
fail_gunlock:
|
|
gfs2_glock_dq(ghs);
|
|
fail:
|
|
if (bh)
|
|
brelse(bh);
|
|
return ERR_PTR(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, const struct qstr *name,
|
|
struct gfs2_inode *ip)
|
|
{
|
|
struct qstr dotname;
|
|
int error;
|
|
|
|
if (ip->i_di.di_entries != 2) {
|
|
if (gfs2_consist_inode(ip))
|
|
gfs2_dinode_print(ip);
|
|
return -EIO;
|
|
}
|
|
|
|
error = gfs2_dir_del(dip, name);
|
|
if (error)
|
|
return error;
|
|
|
|
error = gfs2_change_nlink(dip, -1);
|
|
if (error)
|
|
return error;
|
|
|
|
gfs2_str2qstr(&dotname, ".");
|
|
error = gfs2_dir_del(ip, &dotname);
|
|
if (error)
|
|
return error;
|
|
|
|
gfs2_str2qstr(&dotname, "..");
|
|
error = gfs2_dir_del(ip, &dotname);
|
|
if (error)
|
|
return error;
|
|
|
|
/* It looks odd, but it really should be done twice */
|
|
error = gfs2_change_nlink(ip, -1);
|
|
if (error)
|
|
return error;
|
|
|
|
error = gfs2_change_nlink(ip, -1);
|
|
if (error)
|
|
return error;
|
|
|
|
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, const struct qstr *name,
|
|
const struct gfs2_inode *ip)
|
|
{
|
|
int error;
|
|
|
|
if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode))
|
|
return -EPERM;
|
|
|
|
if ((dip->i_inode.i_mode & S_ISVTX) &&
|
|
dip->i_inode.i_uid != current->fsuid &&
|
|
ip->i_inode.i_uid != current->fsuid && !capable(CAP_FOWNER))
|
|
return -EPERM;
|
|
|
|
if (IS_APPEND(&dip->i_inode))
|
|
return -EPERM;
|
|
|
|
error = permission(&dip->i_inode, MAY_WRITE | MAY_EXEC, NULL);
|
|
if (error)
|
|
return error;
|
|
|
|
error = gfs2_dir_check(&dip->i_inode, name, ip);
|
|
if (error)
|
|
return error;
|
|
|
|
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)
|
|
{
|
|
struct inode *dir = &to->i_inode;
|
|
struct super_block *sb = dir->i_sb;
|
|
struct inode *tmp;
|
|
struct qstr dotdot;
|
|
int error = 0;
|
|
|
|
gfs2_str2qstr(&dotdot, "..");
|
|
|
|
igrab(dir);
|
|
|
|
for (;;) {
|
|
if (dir == &this->i_inode) {
|
|
error = -EINVAL;
|
|
break;
|
|
}
|
|
if (dir == sb->s_root->d_inode) {
|
|
error = 0;
|
|
break;
|
|
}
|
|
|
|
tmp = gfs2_lookupi(dir, &dotdot, 1, NULL);
|
|
if (IS_ERR(tmp)) {
|
|
error = PTR_ERR(tmp);
|
|
break;
|
|
}
|
|
|
|
iput(dir);
|
|
dir = tmp;
|
|
}
|
|
|
|
iput(dir);
|
|
|
|
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_NOFS);
|
|
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;
|
|
struct gfs2_inode *ip = gl->gl_object;
|
|
s64 quantum = gfs2_tune_get(sdp, gt_atime_quantum);
|
|
unsigned int state;
|
|
int flags;
|
|
int error;
|
|
struct timespec tv = CURRENT_TIME;
|
|
|
|
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;
|
|
|
|
if (tv.tv_sec - ip->i_inode.i_atime.tv_sec >= 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. */
|
|
|
|
tv = CURRENT_TIME;
|
|
if (tv.tv_sec - ip->i_inode.i_atime.tv_sec >= quantum) {
|
|
struct buffer_head *dibh;
|
|
struct gfs2_dinode *di;
|
|
|
|
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_inode.i_atime = tv;
|
|
|
|
gfs2_trans_add_bh(ip->i_gl, dibh, 1);
|
|
di = (struct gfs2_dinode *)dibh->b_data;
|
|
di->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec);
|
|
di->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec);
|
|
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;
|
|
}
|
|
|
|
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_inode, attr);
|
|
gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error);
|
|
gfs2_trans_add_bh(ip->i_gl, dibh, 1);
|
|
gfs2_dinode_out(ip, 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;
|
|
|
|
if (current->journal_info)
|
|
return __gfs2_setattr_simple(ip, attr);
|
|
|
|
error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE, 0);
|
|
if (error)
|
|
return error;
|
|
|
|
error = __gfs2_setattr_simple(ip, attr);
|
|
gfs2_trans_end(GFS2_SB(&ip->i_inode));
|
|
return error;
|
|
}
|
|
|
|
void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf)
|
|
{
|
|
const struct gfs2_dinode_host *di = &ip->i_di;
|
|
struct gfs2_dinode *str = buf;
|
|
|
|
str->di_header.mh_magic = cpu_to_be32(GFS2_MAGIC);
|
|
str->di_header.mh_type = cpu_to_be32(GFS2_METATYPE_DI);
|
|
str->di_header.__pad0 = 0;
|
|
str->di_header.mh_format = cpu_to_be32(GFS2_FORMAT_DI);
|
|
str->di_header.__pad1 = 0;
|
|
str->di_num.no_addr = cpu_to_be64(ip->i_no_addr);
|
|
str->di_num.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
|
|
str->di_mode = cpu_to_be32(ip->i_inode.i_mode);
|
|
str->di_uid = cpu_to_be32(ip->i_inode.i_uid);
|
|
str->di_gid = cpu_to_be32(ip->i_inode.i_gid);
|
|
str->di_nlink = cpu_to_be32(ip->i_inode.i_nlink);
|
|
str->di_size = cpu_to_be64(di->di_size);
|
|
str->di_blocks = cpu_to_be64(gfs2_get_inode_blocks(&ip->i_inode));
|
|
str->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec);
|
|
str->di_mtime = cpu_to_be64(ip->i_inode.i_mtime.tv_sec);
|
|
str->di_ctime = cpu_to_be64(ip->i_inode.i_ctime.tv_sec);
|
|
|
|
str->di_goal_meta = cpu_to_be64(ip->i_goal);
|
|
str->di_goal_data = cpu_to_be64(ip->i_goal);
|
|
str->di_generation = cpu_to_be64(di->di_generation);
|
|
|
|
str->di_flags = cpu_to_be32(di->di_flags);
|
|
str->di_height = cpu_to_be16(ip->i_height);
|
|
str->di_payload_format = cpu_to_be32(S_ISDIR(ip->i_inode.i_mode) &&
|
|
!(ip->i_di.di_flags & GFS2_DIF_EXHASH) ?
|
|
GFS2_FORMAT_DE : 0);
|
|
str->di_depth = cpu_to_be16(ip->i_depth);
|
|
str->di_entries = cpu_to_be32(di->di_entries);
|
|
|
|
str->di_eattr = cpu_to_be64(di->di_eattr);
|
|
str->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec);
|
|
str->di_mtime_nsec = cpu_to_be32(ip->i_inode.i_mtime.tv_nsec);
|
|
str->di_ctime_nsec = cpu_to_be32(ip->i_inode.i_ctime.tv_nsec);
|
|
}
|
|
|
|
void gfs2_dinode_print(const struct gfs2_inode *ip)
|
|
{
|
|
const struct gfs2_dinode_host *di = &ip->i_di;
|
|
|
|
printk(KERN_INFO " no_formal_ino = %llu\n",
|
|
(unsigned long long)ip->i_no_formal_ino);
|
|
printk(KERN_INFO " no_addr = %llu\n",
|
|
(unsigned long long)ip->i_no_addr);
|
|
printk(KERN_INFO " di_size = %llu\n", (unsigned long long)di->di_size);
|
|
printk(KERN_INFO " blocks = %llu\n",
|
|
(unsigned long long)gfs2_get_inode_blocks(&ip->i_inode));
|
|
printk(KERN_INFO " i_goal = %llu\n",
|
|
(unsigned long long)ip->i_goal);
|
|
printk(KERN_INFO " di_flags = 0x%.8X\n", di->di_flags);
|
|
printk(KERN_INFO " i_height = %u\n", ip->i_height);
|
|
printk(KERN_INFO " i_depth = %u\n", ip->i_depth);
|
|
printk(KERN_INFO " di_entries = %u\n", di->di_entries);
|
|
printk(KERN_INFO " di_eattr = %llu\n",
|
|
(unsigned long long)di->di_eattr);
|
|
}
|
|
|
|
|