![Steven Whitehouse](/assets/img/avatar_default.png)
There are two spare field in the header common to all GFS2 metadata. One is just the right size to fit a journal id in it, and this patch updates the journal code so that each time a metadata block is modified, we tag it with the journal id of the node which is performing the modification. The reason for this is that it should make it much easier to debug issues which arise if we can tell which node was the last to modify a particular metadata block. Since the field is updated before the block is written into the journal, each journal should only contain metadata which is tagged with its own journal id. The one exception to this is the journal header block, which might have a different node's id in it, if that journal was recovered by another node in the cluster. Thus each journal will contain a record of which nodes recovered it, via the journal header. The other field in the metadata header could potentially be used to hold information about what kind of operation was performed, but for the time being we just zero it on each transaction so that if we use it for that in future, we'll know that the information (where it exists) is reliable. I did consider using the other field to hold the journal sequence number, however since in GFS2's journaling we write the modified data into the journal and not the original data, this gives no information as to what action caused the modification, so I think we can probably come up with a better use for those 64 bits in the future. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
1001 lines
24 KiB
C
1001 lines
24 KiB
C
/*
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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/security.h>
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#include <linux/time.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 "xattr.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 "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 && test_bit(GIF_USER, &ip->i_flags))
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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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set_bit(GIF_USER, &ip->i_flags);
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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 && test_bit(GIF_USER, &ip->i_flags)){
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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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set_bit(GIF_USER, &ip->i_flags);
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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 (gfs2_localflocks(sdp))
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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 (gfs2_localflocks(sdp))
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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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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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const struct gfs2_dinode *str = buf;
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struct timespec atime;
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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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ip->i_disksize = be64_to_cpu(str->di_size);
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i_size_write(&ip->i_inode, ip->i_disksize);
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gfs2_set_inode_blocks(&ip->i_inode, be64_to_cpu(str->di_blocks));
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atime.tv_sec = be64_to_cpu(str->di_atime);
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atime.tv_nsec = be32_to_cpu(str->di_atime_nsec);
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if (timespec_compare(&ip->i_inode.i_atime, &atime) < 0)
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ip->i_inode.i_atime = atime;
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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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ip->i_generation = be64_to_cpu(str->di_generation);
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ip->i_diskflags = 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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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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ip->i_entries = be32_to_cpu(str->di_entries);
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ip->i_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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* 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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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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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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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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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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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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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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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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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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out_rg_gunlock:
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gfs2_glock_dq_uninit(&al->al_rgd_gh);
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out_rindex_relse:
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gfs2_glock_dq_uninit(&al->al_ri_gh);
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out_qs:
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gfs2_quota_unhold(ip);
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out:
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gfs2_alloc_put(ip);
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return error;
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}
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/**
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* gfs2_change_nlink - Change nlink count on inode
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* @ip: The GFS2 inode
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* @diff: The change in the nlink count required
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*
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* Returns: errno
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*/
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int gfs2_change_nlink(struct gfs2_inode *ip, int diff)
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{
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struct buffer_head *dibh;
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u32 nlink;
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int error;
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BUG_ON(diff != 1 && diff != -1);
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nlink = ip->i_inode.i_nlink + diff;
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/* If we are reducing the nlink count, but the new value ends up being
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bigger than the old one, we must have underflowed. */
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if (diff < 0 && nlink > ip->i_inode.i_nlink) {
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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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error = gfs2_meta_inode_buffer(ip, &dibh);
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if (error)
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return error;
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if (diff > 0)
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inc_nlink(&ip->i_inode);
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else
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drop_nlink(&ip->i_inode);
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ip->i_inode.i_ctime = CURRENT_TIME;
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gfs2_trans_add_bh(ip->i_gl, dibh, 1);
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gfs2_dinode_out(ip, dibh->b_data);
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brelse(dibh);
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mark_inode_dirty(&ip->i_inode);
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if (ip->i_inode.i_nlink == 0)
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gfs2_unlink_di(&ip->i_inode); /* mark inode unlinked */
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return error;
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}
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struct inode *gfs2_lookup_simple(struct inode *dip, const char *name)
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{
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struct qstr qstr;
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struct inode *inode;
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gfs2_str2qstr(&qstr, name);
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inode = gfs2_lookupi(dip, &qstr, 1);
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/* gfs2_lookupi has inconsistent callers: vfs
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* related routines expect NULL for no entry found,
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* gfs2_lookup_simple callers expect ENOENT
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* and do not check for NULL.
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*/
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if (inode == NULL)
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return ERR_PTR(-ENOENT);
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else
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return inode;
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}
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/**
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* 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 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 = gfs2_permission(dir, MAY_EXEC);
|
|
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);
|
|
}
|
|
|
|
/**
|
|
* 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 = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
|
|
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_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;
|
|
|
|
error = gfs2_alloc_di(dip, no_addr, 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_diskflags & GFS2_DIF_INHERIT_JDATA) ||
|
|
gfs2_tune_get(sdp, gt_new_files_jdata))
|
|
di->di_flags |= cpu_to_be32(GFS2_DIF_JDATA);
|
|
} else if (S_ISDIR(mode)) {
|
|
di->di_flags |= cpu_to_be32(dip->i_diskflags &
|
|
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;
|
|
|
|
err = security_inode_init_security(&ip->i_inode, &dip->i_inode,
|
|
&name, &value, &len);
|
|
|
|
if (err) {
|
|
if (err == -EOPNOTSUPP)
|
|
return 0;
|
|
return err;
|
|
}
|
|
|
|
err = gfs2_xattr_set(&ip->i_inode, GFS2_EATYPE_SECURITY, name, value, len, 0);
|
|
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 = alloc_dinode(dip, &inum.no_addr, &generation);
|
|
if (error)
|
|
goto fail_gunlock;
|
|
inum.no_formal_ino = generation;
|
|
|
|
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, 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);
|
|
return inode;
|
|
|
|
fail_gunlock2:
|
|
gfs2_glock_dq_uninit(ghs + 1);
|
|
if (inode && !IS_ERR(inode))
|
|
iput(inode);
|
|
fail_gunlock:
|
|
gfs2_glock_dq(ghs);
|
|
fail:
|
|
if (bh)
|
|
brelse(bh);
|
|
return ERR_PTR(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)
|
|
{
|
|
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.mh_format = cpu_to_be32(GFS2_FORMAT_DI);
|
|
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(ip->i_disksize);
|
|
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(ip->i_generation);
|
|
|
|
str->di_flags = cpu_to_be32(ip->i_diskflags);
|
|
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_diskflags & GFS2_DIF_EXHASH) ?
|
|
GFS2_FORMAT_DE : 0);
|
|
str->di_depth = cpu_to_be16(ip->i_depth);
|
|
str->di_entries = cpu_to_be32(ip->i_entries);
|
|
|
|
str->di_eattr = cpu_to_be64(ip->i_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)
|
|
{
|
|
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 " i_disksize = %llu\n",
|
|
(unsigned long long)ip->i_disksize);
|
|
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 " i_diskflags = 0x%.8X\n", ip->i_diskflags);
|
|
printk(KERN_INFO " i_height = %u\n", ip->i_height);
|
|
printk(KERN_INFO " i_depth = %u\n", ip->i_depth);
|
|
printk(KERN_INFO " i_entries = %u\n", ip->i_entries);
|
|
printk(KERN_INFO " i_eattr = %llu\n",
|
|
(unsigned long long)ip->i_eattr);
|
|
}
|
|
|