/*
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
- * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License v.2.
+ * of the GNU General Public License version 2.
*/
#include <linux/sched.h>
#include <linux/spinlock.h>
#include <linux/completion.h>
#include <linux/buffer_head.h>
-#include <linux/vmalloc.h>
#include <linux/blkdev.h>
#include <linux/kthread.h>
+#include <linux/namei.h>
+#include <linux/mount.h>
#include <linux/gfs2_ondisk.h>
-#include <asm/semaphore.h>
+#include <linux/lm_interface.h>
#include "gfs2.h"
-#include "lm_interface.h"
#include "incore.h"
#include "daemon.h"
#include "glock.h"
#include "recovery.h"
#include "rgrp.h"
#include "super.h"
-#include "unlinked.h"
#include "sys.h"
#include "util.h"
#define DO 0
#define UNDO 1
+extern struct dentry_operations gfs2_dops;
+
static struct gfs2_sbd *init_sbd(struct super_block *sb)
{
struct gfs2_sbd *sdp;
- unsigned int x;
- sdp = vmalloc(sizeof(struct gfs2_sbd));
+ sdp = kzalloc(sizeof(struct gfs2_sbd), GFP_KERNEL);
if (!sdp)
return NULL;
- memset(sdp, 0, sizeof(struct gfs2_sbd));
-
sb->s_fs_info = sdp;
sdp->sd_vfs = sb;
gfs2_tune_init(&sdp->sd_tune);
- for (x = 0; x < GFS2_GL_HASH_SIZE; x++) {
- sdp->sd_gl_hash[x].hb_lock = RW_LOCK_UNLOCKED;
- INIT_LIST_HEAD(&sdp->sd_gl_hash[x].hb_list);
- }
INIT_LIST_HEAD(&sdp->sd_reclaim_list);
spin_lock_init(&sdp->sd_reclaim_lock);
init_waitqueue_head(&sdp->sd_reclaim_wq);
- mutex_init(&sdp->sd_invalidate_inodes_mutex);
mutex_init(&sdp->sd_inum_mutex);
spin_lock_init(&sdp->sd_statfs_spin);
spin_lock_init(&sdp->sd_jindex_spin);
mutex_init(&sdp->sd_jindex_mutex);
- INIT_LIST_HEAD(&sdp->sd_unlinked_list);
- spin_lock_init(&sdp->sd_unlinked_spin);
- mutex_init(&sdp->sd_unlinked_mutex);
-
INIT_LIST_HEAD(&sdp->sd_quota_list);
spin_lock_init(&sdp->sd_quota_spin);
mutex_init(&sdp->sd_quota_mutex);
static int init_names(struct gfs2_sbd *sdp, int silent)
{
- struct gfs2_sb *sb = NULL;
+ struct page *page;
char *proto, *table;
int error = 0;
/* Try to autodetect */
if (!proto[0] || !table[0]) {
- struct buffer_head *bh;
- bh = sb_getblk(sdp->sd_vfs,
- GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift);
- lock_buffer(bh);
- clear_buffer_uptodate(bh);
- clear_buffer_dirty(bh);
- unlock_buffer(bh);
- ll_rw_block(READ, 1, &bh);
- wait_on_buffer(bh);
-
- if (!buffer_uptodate(bh)) {
- brelse(bh);
- return -EIO;
- }
-
- sb = kmalloc(sizeof(struct gfs2_sb), GFP_KERNEL);
- if (!sb) {
- brelse(bh);
- return -ENOMEM;
- }
- gfs2_sb_in(sb, bh->b_data);
- brelse(bh);
-
- error = gfs2_check_sb(sdp, sb, silent);
+ struct gfs2_sb *sb;
+ page = gfs2_read_super(sdp->sd_vfs, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift);
+ if (!page)
+ return -ENOBUFS;
+ sb = kmap(page);
+ gfs2_sb_in(&sdp->sd_sb, sb);
+ kunmap(page);
+ __free_page(page);
+
+ error = gfs2_check_sb(sdp, &sdp->sd_sb, silent);
if (error)
goto out;
if (!proto[0])
- proto = sb->sb_lockproto;
+ proto = sdp->sd_sb.sb_lockproto;
if (!table[0])
- table = sb->sb_locktable;
+ table = sdp->sd_sb.sb_locktable;
}
if (!table[0])
snprintf(sdp->sd_proto_name, GFS2_FSNAME_LEN, "%s", proto);
snprintf(sdp->sd_table_name, GFS2_FSNAME_LEN, "%s", table);
- out:
- kfree(sb);
-
+out:
return error;
}
error = gfs2_glock_nq_num(sdp,
GFS2_LIVE_LOCK, &gfs2_nondisk_glops,
LM_ST_SHARED,
- LM_FLAG_NOEXP | GL_EXACT | GL_NEVER_RECURSE,
+ LM_FLAG_NOEXP | GL_EXACT,
&sdp->sd_live_gh);
if (error) {
fs_err(sdp, "can't acquire live glock: %d\n", error);
return 0;
- fail_trans:
+fail_trans:
gfs2_glock_put(sdp->sd_trans_gl);
-
- fail_rename:
+fail_rename:
gfs2_glock_put(sdp->sd_rename_gl);
-
- fail_live:
+fail_live:
gfs2_glock_dq_uninit(&sdp->sd_live_gh);
-
- fail_mount:
+fail_mount:
gfs2_glock_dq_uninit(mount_gh);
-
- fail:
+fail:
while (sdp->sd_glockd_num--)
kthread_stop(sdp->sd_glockd_process[sdp->sd_glockd_num]);
kthread_stop(sdp->sd_scand_process);
-
return error;
}
-static struct inode *gfs2_lookup_root(struct gfs2_sbd *sdp,
- const struct gfs2_inum *inum)
+static struct inode *gfs2_lookup_root(struct super_block *sb,
+ struct gfs2_inum *inum)
{
- int error;
- struct gfs2_glock *gl;
- struct gfs2_inode *ip;
- struct inode *inode;
-
- error = gfs2_glock_get(sdp, inum->no_addr,
- &gfs2_inode_glops, CREATE, &gl);
- if (!error) {
- error = gfs2_inode_get(gl, inum, CREATE, &ip);
- if (!error) {
- gfs2_inode_min_init(ip, DT_DIR);
- inode = gfs2_ip2v(ip);
- gfs2_inode_put(ip);
- gfs2_glock_put(gl);
- return inode;
- }
- gfs2_glock_put(gl);
- }
- return ERR_PTR(error);
+ return gfs2_inode_lookup(sb, inum, DT_DIR);
}
static int init_sb(struct gfs2_sbd *sdp, int silent, int undo)
int error = 0;
if (undo) {
+ if (sb->s_root) {
+ dput(sb->s_root);
+ sb->s_root = NULL;
+ }
return 0;
}
-
- error = gfs2_glock_nq_num(sdp,
- GFS2_SB_LOCK, &gfs2_meta_glops,
+
+ error = gfs2_glock_nq_num(sdp, GFS2_SB_LOCK, &gfs2_meta_glops,
LM_ST_SHARED, 0, &sb_gh);
if (error) {
fs_err(sdp, "can't acquire superblock glock: %d\n", error);
sdp->sd_sb.sb_bsize, (unsigned int)PAGE_SIZE);
goto out;
}
-
- /* Get rid of buffers from the original block size */
- sb_gh.gh_gl->gl_ops->go_inval(sb_gh.gh_gl, DIO_METADATA | DIO_DATA);
- sb_gh.gh_gl->gl_aspace->i_blkbits = sdp->sd_sb.sb_bsize_shift;
-
sb_set_blocksize(sb, sdp->sd_sb.sb_bsize);
/* Get the root inode */
inum = &sdp->sd_sb.sb_root_dir;
if (sb->s_type == &gfs2meta_fs_type)
inum = &sdp->sd_sb.sb_master_dir;
- inode = gfs2_lookup_root(sdp, inum);
+ inode = gfs2_lookup_root(sb, inum);
if (IS_ERR(inode)) {
error = PTR_ERR(inode);
fs_err(sdp, "can't read in root inode: %d\n", error);
error = -ENOMEM;
iput(inode);
}
+ sb->s_root->d_op = &gfs2_dops;
out:
gfs2_glock_dq_uninit(&sb_gh);
return error;
fs_err(sdp, "can't lookup journal index: %d\n", error);
return PTR_ERR(sdp->sd_jindex);
}
- ip = sdp->sd_jindex->u.generic_ip;
+ ip = GFS2_I(sdp->sd_jindex);
set_bit(GLF_STICKY, &ip->i_gl->gl_flags);
/* Load in the journal index special file */
error = -EINVAL;
if (!gfs2_jindex_size(sdp)) {
fs_err(sdp, "no journals!\n");
- goto fail_jindex;
+ goto fail_jindex;
}
if (sdp->sd_args.ar_spectator) {
}
sdp->sd_jdesc = gfs2_jdesc_find(sdp, sdp->sd_lockstruct.ls_jid);
- error = gfs2_glock_nq_num(sdp,
- sdp->sd_lockstruct.ls_jid,
+ error = gfs2_glock_nq_num(sdp, sdp->sd_lockstruct.ls_jid,
&gfs2_journal_glops,
LM_ST_EXCLUSIVE, LM_FLAG_NOEXP,
&sdp->sd_journal_gh);
goto fail_jindex;
}
- ip = sdp->sd_jdesc->jd_inode->u.generic_ip;
- error = gfs2_glock_nq_init(ip->i_gl,
- LM_ST_SHARED,
+ ip = GFS2_I(sdp->sd_jdesc->jd_inode);
+ error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED,
LM_FLAG_NOEXP | GL_EXACT,
&sdp->sd_jinode_gh);
if (error) {
if (sdp->sd_lockstruct.ls_first) {
unsigned int x;
for (x = 0; x < sdp->sd_journals; x++) {
- error = gfs2_recover_journal(gfs2_jdesc_find(sdp, x),
- WAIT);
+ error = gfs2_recover_journal(gfs2_jdesc_find(sdp, x));
if (error) {
fs_err(sdp, "error recovering journal %u: %d\n",
x, error);
gfs2_lm_others_may_mount(sdp);
} else if (!sdp->sd_args.ar_spectator) {
- error = gfs2_recover_journal(sdp->sd_jdesc, WAIT);
+ error = gfs2_recover_journal(sdp->sd_jdesc);
if (error) {
fs_err(sdp, "error recovering my journal: %d\n", error);
goto fail_jinode_gh;
gfs2_glock_dq_uninit(&ji_gh);
jindex = 0;
- /* Disown my Journal glock */
-
- sdp->sd_journal_gh.gh_owner = NULL;
- sdp->sd_jinode_gh.gh_owner = NULL;
-
p = kthread_run(gfs2_recoverd, sdp, "gfs2_recoverd");
error = IS_ERR(p);
if (error) {
return 0;
- fail_recoverd:
+fail_recoverd:
kthread_stop(sdp->sd_recoverd_process);
-
- fail_jinode_gh:
+fail_jinode_gh:
if (!sdp->sd_args.ar_spectator)
gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
-
- fail_journal_gh:
+fail_journal_gh:
if (!sdp->sd_args.ar_spectator)
gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
-
- fail_jindex:
+fail_jindex:
gfs2_jindex_free(sdp);
if (jindex)
gfs2_glock_dq_uninit(&ji_gh);
-
- fail:
+fail:
iput(sdp->sd_jindex);
-
return error;
}
if (undo)
goto fail_qinode;
- inode = gfs2_lookup_root(sdp, &sdp->sd_sb.sb_master_dir);
+ inode = gfs2_lookup_root(sdp->sd_vfs, &sdp->sd_sb.sb_master_dir);
if (IS_ERR(inode)) {
error = PTR_ERR(inode);
fs_err(sdp, "can't read in master directory: %d\n", error);
fs_err(sdp, "can't get resource index inode: %d\n", error);
goto fail_statfs;
}
- ip = sdp->sd_rindex->u.generic_ip;
+ ip = GFS2_I(sdp->sd_rindex);
set_bit(GLF_STICKY, &ip->i_gl->gl_flags);
sdp->sd_rindex_vn = ip->i_gl->gl_vn - 1;
fail_qinode:
iput(sdp->sd_quota_inode);
-
fail_rindex:
gfs2_clear_rgrpd(sdp);
iput(sdp->sd_rindex);
-
fail_statfs:
iput(sdp->sd_statfs_inode);
-
fail_inum:
iput(sdp->sd_inum_inode);
fail_journal:
goto fail_ir_i;
}
- sprintf(buf, "unlinked_tag%u", sdp->sd_jdesc->jd_jid);
- sdp->sd_ut_inode = gfs2_lookup_simple(pn, buf);
- if (IS_ERR(sdp->sd_ut_inode)) {
- error = PTR_ERR(sdp->sd_ut_inode);
- fs_err(sdp, "can't find local \"ut\" file: %d\n", error);
- goto fail_sc_i;
- }
-
sprintf(buf, "quota_change%u", sdp->sd_jdesc->jd_jid);
sdp->sd_qc_inode = gfs2_lookup_simple(pn, buf);
if (IS_ERR(sdp->sd_qc_inode)) {
iput(pn);
pn = NULL;
- ip = sdp->sd_ir_inode->u.generic_ip;
+ ip = GFS2_I(sdp->sd_ir_inode);
error = gfs2_glock_nq_init(ip->i_gl,
- LM_ST_EXCLUSIVE, GL_NEVER_RECURSE,
+ LM_ST_EXCLUSIVE, 0,
&sdp->sd_ir_gh);
if (error) {
fs_err(sdp, "can't lock local \"ir\" file: %d\n", error);
goto fail_qc_i;
}
- ip = sdp->sd_sc_inode->u.generic_ip;
+ ip = GFS2_I(sdp->sd_sc_inode);
error = gfs2_glock_nq_init(ip->i_gl,
- LM_ST_EXCLUSIVE, GL_NEVER_RECURSE,
+ LM_ST_EXCLUSIVE, 0,
&sdp->sd_sc_gh);
if (error) {
fs_err(sdp, "can't lock local \"sc\" file: %d\n", error);
goto fail_ir_gh;
}
- ip = sdp->sd_ut_inode->u.generic_ip;
- error = gfs2_glock_nq_init(ip->i_gl,
- LM_ST_EXCLUSIVE, GL_NEVER_RECURSE,
- &sdp->sd_ut_gh);
- if (error) {
- fs_err(sdp, "can't lock local \"ut\" file: %d\n", error);
- goto fail_sc_gh;
- }
-
- ip = sdp->sd_qc_inode->u.generic_ip;
+ ip = GFS2_I(sdp->sd_qc_inode);
error = gfs2_glock_nq_init(ip->i_gl,
- LM_ST_EXCLUSIVE, GL_NEVER_RECURSE,
+ LM_ST_EXCLUSIVE, 0,
&sdp->sd_qc_gh);
if (error) {
fs_err(sdp, "can't lock local \"qc\" file: %d\n", error);
return 0;
- fail_qc_gh:
+fail_qc_gh:
gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
-
- fail_ut_gh:
- gfs2_glock_dq_uninit(&sdp->sd_ut_gh);
-
- fail_sc_gh:
+fail_ut_gh:
gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
-
- fail_ir_gh:
+fail_ir_gh:
gfs2_glock_dq_uninit(&sdp->sd_ir_gh);
-
- fail_qc_i:
+fail_qc_i:
iput(sdp->sd_qc_inode);
-
- fail_ut_i:
- iput(sdp->sd_ut_inode);
-
- fail_sc_i:
+fail_ut_i:
iput(sdp->sd_sc_inode);
-
- fail_ir_i:
+fail_ir_i:
iput(sdp->sd_ir_inode);
-
- fail:
+fail:
if (pn)
iput(pn);
return error;
int error = 0;
if (undo)
- goto fail_inoded;
+ goto fail_quotad;
sdp->sd_log_flush_time = jiffies;
sdp->sd_jindex_refresh_time = jiffies;
}
sdp->sd_quotad_process = p;
- p = kthread_run(gfs2_inoded, sdp, "gfs2_inoded");
- error = IS_ERR(p);
- if (error) {
- fs_err(sdp, "can't start inoded thread: %d\n", error);
- goto fail_quotad;
- }
- sdp->sd_inoded_process = p;
-
return 0;
- fail_inoded:
- kthread_stop(sdp->sd_inoded_process);
- fail_quotad:
+fail_quotad:
kthread_stop(sdp->sd_quotad_process);
-
- fail:
+fail:
kthread_stop(sdp->sd_logd_process);
-
return error;
}
return 0;
- fail_threads:
+fail_threads:
init_threads(sdp, UNDO);
-
- fail_per_node:
+fail_per_node:
init_per_node(sdp, UNDO);
-
- fail_inodes:
+fail_inodes:
init_inodes(sdp, UNDO);
-
- fail_sb:
+fail_sb:
init_sb(sdp, 0, UNDO);
-
- fail_locking:
+fail_locking:
init_locking(sdp, &mount_gh, UNDO);
-
- fail_lm:
+fail_lm:
gfs2_gl_hash_clear(sdp, WAIT);
gfs2_lm_unmount(sdp);
while (invalidate_inodes(sb))
yield();
-
- fail_sys:
+fail_sys:
gfs2_sys_fs_del(sdp);
-
- fail:
- vfree(sdp);
+fail:
+ kfree(sdp);
sb->s_fs_info = NULL;
+ return error;
+}
+static int gfs2_get_sb(struct file_system_type *fs_type, int flags,
+ const char *dev_name, void *data, struct vfsmount *mnt)
+{
+ struct super_block *sb;
+ struct gfs2_sbd *sdp;
+ int error = get_sb_bdev(fs_type, flags, dev_name, data, fill_super, mnt);
+ if (error)
+ goto out;
+ sb = mnt->mnt_sb;
+ sdp = sb->s_fs_info;
+ sdp->sd_gfs2mnt = mnt;
+out:
return error;
}
-static struct super_block *gfs2_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name,
- void *data)
+static int fill_super_meta(struct super_block *sb, struct super_block *new,
+ void *data, int silent)
+{
+ struct gfs2_sbd *sdp = sb->s_fs_info;
+ struct inode *inode;
+ int error = 0;
+
+ new->s_fs_info = sdp;
+ sdp->sd_vfs_meta = sb;
+
+ init_vfs(new, SDF_NOATIME);
+
+ /* Get the master inode */
+ inode = igrab(sdp->sd_master_dir);
+
+ new->s_root = d_alloc_root(inode);
+ if (!new->s_root) {
+ fs_err(sdp, "can't get root dentry\n");
+ error = -ENOMEM;
+ iput(inode);
+ } else
+ new->s_root->d_op = &gfs2_dops;
+
+ return error;
+}
+
+static int set_bdev_super(struct super_block *s, void *data)
+{
+ s->s_bdev = data;
+ s->s_dev = s->s_bdev->bd_dev;
+ return 0;
+}
+
+static int test_bdev_super(struct super_block *s, void *data)
{
- return get_sb_bdev(fs_type, flags, dev_name, data, fill_super);
+ return s->s_bdev == data;
+}
+
+static struct super_block* get_gfs2_sb(const char *dev_name)
+{
+ struct kstat stat;
+ struct nameidata nd;
+ struct file_system_type *fstype;
+ struct super_block *sb = NULL, *s;
+ struct list_head *l;
+ int error;
+
+ error = path_lookup(dev_name, LOOKUP_FOLLOW, &nd);
+ if (error) {
+ printk(KERN_WARNING "GFS2: path_lookup on %s returned error\n",
+ dev_name);
+ goto out;
+ }
+ error = vfs_getattr(nd.mnt, nd.dentry, &stat);
+
+ fstype = get_fs_type("gfs2");
+ list_for_each(l, &fstype->fs_supers) {
+ s = list_entry(l, struct super_block, s_instances);
+ if ((S_ISBLK(stat.mode) && s->s_dev == stat.rdev) ||
+ (S_ISDIR(stat.mode) && s == nd.dentry->d_inode->i_sb)) {
+ sb = s;
+ goto free_nd;
+ }
+ }
+
+ printk(KERN_WARNING "GFS2: Unrecognized block device or "
+ "mount point %s", dev_name);
+
+free_nd:
+ path_release(&nd);
+out:
+ return sb;
+}
+
+static int gfs2_get_sb_meta(struct file_system_type *fs_type, int flags,
+ const char *dev_name, void *data, struct vfsmount *mnt)
+{
+ int error = 0;
+ struct super_block *sb = NULL, *new;
+ struct gfs2_sbd *sdp;
+
+ sb = get_gfs2_sb(dev_name);
+ if (!sb) {
+ printk(KERN_WARNING "GFS2: gfs2 mount does not exist\n");
+ error = -ENOENT;
+ goto error;
+ }
+ sdp = (struct gfs2_sbd*) sb->s_fs_info;
+ if (sdp->sd_vfs_meta) {
+ printk(KERN_WARNING "GFS2: gfs2meta mount already exists\n");
+ error = -EBUSY;
+ goto error;
+ }
+ mutex_lock(&sb->s_bdev->bd_mount_mutex);
+ new = sget(fs_type, test_bdev_super, set_bdev_super, sb->s_bdev);
+ mutex_unlock(&sb->s_bdev->bd_mount_mutex);
+ if (IS_ERR(new)) {
+ error = PTR_ERR(new);
+ goto error;
+ }
+ module_put(fs_type->owner);
+ new->s_flags = flags;
+ strlcpy(new->s_id, sb->s_id, sizeof(new->s_id));
+ sb_set_blocksize(new, sb->s_blocksize);
+ error = fill_super_meta(sb, new, data, flags & MS_SILENT ? 1 : 0);
+ if (error) {
+ up_write(&new->s_umount);
+ deactivate_super(new);
+ goto error;
+ }
+
+ new->s_flags |= MS_ACTIVE;
+
+ /* Grab a reference to the gfs2 mount point */
+ atomic_inc(&sdp->sd_gfs2mnt->mnt_count);
+ return simple_set_mnt(mnt, new);
+error:
+ return error;
}
static void gfs2_kill_sb(struct super_block *sb)
kill_block_super(sb);
}
+static void gfs2_kill_sb_meta(struct super_block *sb)
+{
+ struct gfs2_sbd *sdp = sb->s_fs_info;
+ generic_shutdown_super(sb);
+ sdp->sd_vfs_meta = NULL;
+ atomic_dec(&sdp->sd_gfs2mnt->mnt_count);
+}
+
struct file_system_type gfs2_fs_type = {
.name = "gfs2",
.fs_flags = FS_REQUIRES_DEV,
struct file_system_type gfs2meta_fs_type = {
.name = "gfs2meta",
.fs_flags = FS_REQUIRES_DEV,
- .get_sb = gfs2_get_sb,
- .kill_sb = gfs2_kill_sb,
+ .get_sb = gfs2_get_sb_meta,
+ .kill_sb = gfs2_kill_sb_meta,
.owner = THIS_MODULE,
};
git.openpandora.org / pandora-kernel.git / blobdiff