--- /dev/null
+/*
+ * Copyright (C) Sistina Software, Inc. 1997-2003 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 version 2.
+ */
+
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/completion.h>
+#include <linux/buffer_head.h>
+#include <linux/blkdev.h>
+#include <linux/kthread.h>
+#include <linux/namei.h>
+#include <linux/mount.h>
+#include <linux/gfs2_ondisk.h>
+#include <linux/lm_interface.h>
+
+#include "gfs2.h"
+#include "incore.h"
+#include "daemon.h"
+#include "glock.h"
+#include "glops.h"
+#include "inode.h"
+#include "lm.h"
+#include "mount.h"
+#include "ops_export.h"
+#include "ops_fstype.h"
+#include "ops_super.h"
+#include "recovery.h"
+#include "rgrp.h"
+#include "super.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;
+
+ sdp = kzalloc(sizeof(struct gfs2_sbd), GFP_KERNEL);
+ if (!sdp)
+ return NULL;
+
+ sb->s_fs_info = sdp;
+ sdp->sd_vfs = sb;
+
+ gfs2_tune_init(&sdp->sd_tune);
+
+ 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_inum_mutex);
+ spin_lock_init(&sdp->sd_statfs_spin);
+ mutex_init(&sdp->sd_statfs_mutex);
+
+ spin_lock_init(&sdp->sd_rindex_spin);
+ mutex_init(&sdp->sd_rindex_mutex);
+ INIT_LIST_HEAD(&sdp->sd_rindex_list);
+ INIT_LIST_HEAD(&sdp->sd_rindex_mru_list);
+ INIT_LIST_HEAD(&sdp->sd_rindex_recent_list);
+
+ INIT_LIST_HEAD(&sdp->sd_jindex_list);
+ spin_lock_init(&sdp->sd_jindex_spin);
+ mutex_init(&sdp->sd_jindex_mutex);
+
+ INIT_LIST_HEAD(&sdp->sd_quota_list);
+ spin_lock_init(&sdp->sd_quota_spin);
+ mutex_init(&sdp->sd_quota_mutex);
+
+ spin_lock_init(&sdp->sd_log_lock);
+
+ INIT_LIST_HEAD(&sdp->sd_log_le_gl);
+ INIT_LIST_HEAD(&sdp->sd_log_le_buf);
+ INIT_LIST_HEAD(&sdp->sd_log_le_revoke);
+ INIT_LIST_HEAD(&sdp->sd_log_le_rg);
+ INIT_LIST_HEAD(&sdp->sd_log_le_databuf);
+
+ mutex_init(&sdp->sd_log_reserve_mutex);
+ INIT_LIST_HEAD(&sdp->sd_ail1_list);
+ INIT_LIST_HEAD(&sdp->sd_ail2_list);
+
+ init_rwsem(&sdp->sd_log_flush_lock);
+ INIT_LIST_HEAD(&sdp->sd_log_flush_list);
+
+ INIT_LIST_HEAD(&sdp->sd_revoke_list);
+
+ mutex_init(&sdp->sd_freeze_lock);
+
+ return sdp;
+}
+
+static void init_vfs(struct super_block *sb, unsigned noatime)
+{
+ struct gfs2_sbd *sdp = sb->s_fs_info;
+
+ sb->s_magic = GFS2_MAGIC;
+ sb->s_op = &gfs2_super_ops;
+ sb->s_export_op = &gfs2_export_ops;
+ sb->s_maxbytes = MAX_LFS_FILESIZE;
+
+ if (sb->s_flags & (MS_NOATIME | MS_NODIRATIME))
+ set_bit(noatime, &sdp->sd_flags);
+
+ /* Don't let the VFS update atimes. GFS2 handles this itself. */
+ sb->s_flags |= MS_NOATIME | MS_NODIRATIME;
+}
+
+static int init_names(struct gfs2_sbd *sdp, int silent)
+{
+ struct page *page;
+ char *proto, *table;
+ int error = 0;
+
+ proto = sdp->sd_args.ar_lockproto;
+ table = sdp->sd_args.ar_locktable;
+
+ /* Try to autodetect */
+
+ if (!proto[0] || !table[0]) {
+ 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 = sdp->sd_sb.sb_lockproto;
+ if (!table[0])
+ table = sdp->sd_sb.sb_locktable;
+ }
+
+ if (!table[0])
+ table = sdp->sd_vfs->s_id;
+
+ snprintf(sdp->sd_proto_name, GFS2_FSNAME_LEN, "%s", proto);
+ snprintf(sdp->sd_table_name, GFS2_FSNAME_LEN, "%s", table);
+
+out:
+ return error;
+}
+
+static int init_locking(struct gfs2_sbd *sdp, struct gfs2_holder *mount_gh,
+ int undo)
+{
+ struct task_struct *p;
+ int error = 0;
+
+ if (undo)
+ goto fail_trans;
+
+ p = kthread_run(gfs2_scand, sdp, "gfs2_scand");
+ error = IS_ERR(p);
+ if (error) {
+ fs_err(sdp, "can't start scand thread: %d\n", error);
+ return error;
+ }
+ sdp->sd_scand_process = p;
+
+ for (sdp->sd_glockd_num = 0;
+ sdp->sd_glockd_num < sdp->sd_args.ar_num_glockd;
+ sdp->sd_glockd_num++) {
+ p = kthread_run(gfs2_glockd, sdp, "gfs2_glockd");
+ error = IS_ERR(p);
+ if (error) {
+ fs_err(sdp, "can't start glockd thread: %d\n", error);
+ goto fail;
+ }
+ sdp->sd_glockd_process[sdp->sd_glockd_num] = p;
+ }
+
+ error = gfs2_glock_nq_num(sdp,
+ GFS2_MOUNT_LOCK, &gfs2_nondisk_glops,
+ LM_ST_EXCLUSIVE, LM_FLAG_NOEXP | GL_NOCACHE,
+ mount_gh);
+ if (error) {
+ fs_err(sdp, "can't acquire mount glock: %d\n", error);
+ goto fail;
+ }
+
+ error = gfs2_glock_nq_num(sdp,
+ GFS2_LIVE_LOCK, &gfs2_nondisk_glops,
+ LM_ST_SHARED,
+ LM_FLAG_NOEXP | GL_EXACT,
+ &sdp->sd_live_gh);
+ if (error) {
+ fs_err(sdp, "can't acquire live glock: %d\n", error);
+ goto fail_mount;
+ }
+
+ error = gfs2_glock_get(sdp, GFS2_RENAME_LOCK, &gfs2_nondisk_glops,
+ CREATE, &sdp->sd_rename_gl);
+ if (error) {
+ fs_err(sdp, "can't create rename glock: %d\n", error);
+ goto fail_live;
+ }
+
+ error = gfs2_glock_get(sdp, GFS2_TRANS_LOCK, &gfs2_trans_glops,
+ CREATE, &sdp->sd_trans_gl);
+ if (error) {
+ fs_err(sdp, "can't create transaction glock: %d\n", error);
+ goto fail_rename;
+ }
+ set_bit(GLF_STICKY, &sdp->sd_trans_gl->gl_flags);
+
+ return 0;
+
+fail_trans:
+ gfs2_glock_put(sdp->sd_trans_gl);
+fail_rename:
+ gfs2_glock_put(sdp->sd_rename_gl);
+fail_live:
+ gfs2_glock_dq_uninit(&sdp->sd_live_gh);
+fail_mount:
+ gfs2_glock_dq_uninit(mount_gh);
+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 super_block *sb,
+ struct gfs2_inum_host *inum)
+{
+ return gfs2_inode_lookup(sb, inum, DT_DIR);
+}
+
+static int init_sb(struct gfs2_sbd *sdp, int silent, int undo)
+{
+ struct super_block *sb = sdp->sd_vfs;
+ struct gfs2_holder sb_gh;
+ struct gfs2_inum_host *inum;
+ struct inode *inode;
+ 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,
+ LM_ST_SHARED, 0, &sb_gh);
+ if (error) {
+ fs_err(sdp, "can't acquire superblock glock: %d\n", error);
+ return error;
+ }
+
+ error = gfs2_read_sb(sdp, sb_gh.gh_gl, silent);
+ if (error) {
+ fs_err(sdp, "can't read superblock: %d\n", error);
+ goto out;
+ }
+
+ /* Set up the buffer cache and SB for real */
+ if (sdp->sd_sb.sb_bsize < bdev_hardsect_size(sb->s_bdev)) {
+ error = -EINVAL;
+ fs_err(sdp, "FS block size (%u) is too small for device "
+ "block size (%u)\n",
+ sdp->sd_sb.sb_bsize, bdev_hardsect_size(sb->s_bdev));
+ goto out;
+ }
+ if (sdp->sd_sb.sb_bsize > PAGE_SIZE) {
+ error = -EINVAL;
+ fs_err(sdp, "FS block size (%u) is too big for machine "
+ "page size (%u)\n",
+ sdp->sd_sb.sb_bsize, (unsigned int)PAGE_SIZE);
+ goto out;
+ }
+ 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(sb, inum);
+ if (IS_ERR(inode)) {
+ error = PTR_ERR(inode);
+ fs_err(sdp, "can't read in root inode: %d\n", error);
+ goto out;
+ }
+
+ sb->s_root = d_alloc_root(inode);
+ if (!sb->s_root) {
+ fs_err(sdp, "can't get root dentry\n");
+ error = -ENOMEM;
+ iput(inode);
+ }
+ sb->s_root->d_op = &gfs2_dops;
+out:
+ gfs2_glock_dq_uninit(&sb_gh);
+ return error;
+}
+
+static int init_journal(struct gfs2_sbd *sdp, int undo)
+{
+ struct gfs2_holder ji_gh;
+ struct task_struct *p;
+ struct gfs2_inode *ip;
+ int jindex = 1;
+ int error = 0;
+
+ if (undo) {
+ jindex = 0;
+ goto fail_recoverd;
+ }
+
+ sdp->sd_jindex = gfs2_lookup_simple(sdp->sd_master_dir, "jindex");
+ if (IS_ERR(sdp->sd_jindex)) {
+ fs_err(sdp, "can't lookup journal index: %d\n", error);
+ return PTR_ERR(sdp->sd_jindex);
+ }
+ ip = GFS2_I(sdp->sd_jindex);
+ set_bit(GLF_STICKY, &ip->i_gl->gl_flags);
+
+ /* Load in the journal index special file */
+
+ error = gfs2_jindex_hold(sdp, &ji_gh);
+ if (error) {
+ fs_err(sdp, "can't read journal index: %d\n", error);
+ goto fail;
+ }
+
+ error = -EINVAL;
+ if (!gfs2_jindex_size(sdp)) {
+ fs_err(sdp, "no journals!\n");
+ goto fail_jindex;
+ }
+
+ if (sdp->sd_args.ar_spectator) {
+ sdp->sd_jdesc = gfs2_jdesc_find(sdp, 0);
+ sdp->sd_log_blks_free = sdp->sd_jdesc->jd_blocks;
+ } else {
+ if (sdp->sd_lockstruct.ls_jid >= gfs2_jindex_size(sdp)) {
+ fs_err(sdp, "can't mount journal #%u\n",
+ sdp->sd_lockstruct.ls_jid);
+ fs_err(sdp, "there are only %u journals (0 - %u)\n",
+ gfs2_jindex_size(sdp),
+ gfs2_jindex_size(sdp) - 1);
+ goto fail_jindex;
+ }
+ sdp->sd_jdesc = gfs2_jdesc_find(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);
+ if (error) {
+ fs_err(sdp, "can't acquire journal glock: %d\n", error);
+ goto fail_jindex;
+ }
+
+ 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) {
+ fs_err(sdp, "can't acquire journal inode glock: %d\n",
+ error);
+ goto fail_journal_gh;
+ }
+
+ error = gfs2_jdesc_check(sdp->sd_jdesc);
+ if (error) {
+ fs_err(sdp, "my journal (%u) is bad: %d\n",
+ sdp->sd_jdesc->jd_jid, error);
+ goto fail_jinode_gh;
+ }
+ sdp->sd_log_blks_free = sdp->sd_jdesc->jd_blocks;
+ }
+
+ 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));
+ if (error) {
+ fs_err(sdp, "error recovering journal %u: %d\n",
+ x, error);
+ goto fail_jinode_gh;
+ }
+ }
+
+ gfs2_lm_others_may_mount(sdp);
+ } else if (!sdp->sd_args.ar_spectator) {
+ error = gfs2_recover_journal(sdp->sd_jdesc);
+ if (error) {
+ fs_err(sdp, "error recovering my journal: %d\n", error);
+ goto fail_jinode_gh;
+ }
+ }
+
+ set_bit(SDF_JOURNAL_CHECKED, &sdp->sd_flags);
+ gfs2_glock_dq_uninit(&ji_gh);
+ jindex = 0;
+
+ p = kthread_run(gfs2_recoverd, sdp, "gfs2_recoverd");
+ error = IS_ERR(p);
+ if (error) {
+ fs_err(sdp, "can't start recoverd thread: %d\n", error);
+ goto fail_jinode_gh;
+ }
+ sdp->sd_recoverd_process = p;
+
+ return 0;
+
+fail_recoverd:
+ kthread_stop(sdp->sd_recoverd_process);
+fail_jinode_gh:
+ if (!sdp->sd_args.ar_spectator)
+ gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
+fail_journal_gh:
+ if (!sdp->sd_args.ar_spectator)
+ gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
+fail_jindex:
+ gfs2_jindex_free(sdp);
+ if (jindex)
+ gfs2_glock_dq_uninit(&ji_gh);
+fail:
+ iput(sdp->sd_jindex);
+ return error;
+}
+
+
+static int init_inodes(struct gfs2_sbd *sdp, int undo)
+{
+ int error = 0;
+ struct gfs2_inode *ip;
+ struct inode *inode;
+
+ if (undo)
+ goto fail_qinode;
+
+ 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);
+ goto fail;
+ }
+ sdp->sd_master_dir = inode;
+
+ error = init_journal(sdp, undo);
+ if (error)
+ goto fail_master;
+
+ /* Read in the master inode number inode */
+ sdp->sd_inum_inode = gfs2_lookup_simple(sdp->sd_master_dir, "inum");
+ if (IS_ERR(sdp->sd_inum_inode)) {
+ error = PTR_ERR(sdp->sd_inum_inode);
+ fs_err(sdp, "can't read in inum inode: %d\n", error);
+ goto fail_journal;
+ }
+
+
+ /* Read in the master statfs inode */
+ sdp->sd_statfs_inode = gfs2_lookup_simple(sdp->sd_master_dir, "statfs");
+ if (IS_ERR(sdp->sd_statfs_inode)) {
+ error = PTR_ERR(sdp->sd_statfs_inode);
+ fs_err(sdp, "can't read in statfs inode: %d\n", error);
+ goto fail_inum;
+ }
+
+ /* Read in the resource index inode */
+ sdp->sd_rindex = gfs2_lookup_simple(sdp->sd_master_dir, "rindex");
+ if (IS_ERR(sdp->sd_rindex)) {
+ error = PTR_ERR(sdp->sd_rindex);
+ fs_err(sdp, "can't get resource index inode: %d\n", error);
+ goto fail_statfs;
+ }
+ 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;
+
+ /* Read in the quota inode */
+ sdp->sd_quota_inode = gfs2_lookup_simple(sdp->sd_master_dir, "quota");
+ if (IS_ERR(sdp->sd_quota_inode)) {
+ error = PTR_ERR(sdp->sd_quota_inode);
+ fs_err(sdp, "can't get quota file inode: %d\n", error);
+ goto fail_rindex;
+ }
+ return 0;
+
+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:
+ init_journal(sdp, UNDO);
+fail_master:
+ iput(sdp->sd_master_dir);
+fail:
+ return error;
+}
+
+static int init_per_node(struct gfs2_sbd *sdp, int undo)
+{
+ struct inode *pn = NULL;
+ char buf[30];
+ int error = 0;
+ struct gfs2_inode *ip;
+
+ if (sdp->sd_args.ar_spectator)
+ return 0;
+
+ if (undo)
+ goto fail_qc_gh;
+
+ pn = gfs2_lookup_simple(sdp->sd_master_dir, "per_node");
+ if (IS_ERR(pn)) {
+ error = PTR_ERR(pn);
+ fs_err(sdp, "can't find per_node directory: %d\n", error);
+ return error;
+ }
+
+ sprintf(buf, "inum_range%u", sdp->sd_jdesc->jd_jid);
+ sdp->sd_ir_inode = gfs2_lookup_simple(pn, buf);
+ if (IS_ERR(sdp->sd_ir_inode)) {
+ error = PTR_ERR(sdp->sd_ir_inode);
+ fs_err(sdp, "can't find local \"ir\" file: %d\n", error);
+ goto fail;
+ }
+
+ sprintf(buf, "statfs_change%u", sdp->sd_jdesc->jd_jid);
+ sdp->sd_sc_inode = gfs2_lookup_simple(pn, buf);
+ if (IS_ERR(sdp->sd_sc_inode)) {
+ error = PTR_ERR(sdp->sd_sc_inode);
+ fs_err(sdp, "can't find local \"sc\" file: %d\n", error);
+ goto fail_ir_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)) {
+ error = PTR_ERR(sdp->sd_qc_inode);
+ fs_err(sdp, "can't find local \"qc\" file: %d\n", error);
+ goto fail_ut_i;
+ }
+
+ iput(pn);
+ pn = NULL;
+
+ ip = GFS2_I(sdp->sd_ir_inode);
+ error = gfs2_glock_nq_init(ip->i_gl,
+ 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 = GFS2_I(sdp->sd_sc_inode);
+ error = gfs2_glock_nq_init(ip->i_gl,
+ 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 = GFS2_I(sdp->sd_qc_inode);
+ error = gfs2_glock_nq_init(ip->i_gl,
+ LM_ST_EXCLUSIVE, 0,
+ &sdp->sd_qc_gh);
+ if (error) {
+ fs_err(sdp, "can't lock local \"qc\" file: %d\n", error);
+ goto fail_ut_gh;
+ }
+
+ return 0;
+
+fail_qc_gh:
+ gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
+fail_ut_gh:
+ gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
+fail_ir_gh:
+ gfs2_glock_dq_uninit(&sdp->sd_ir_gh);
+fail_qc_i:
+ iput(sdp->sd_qc_inode);
+fail_ut_i:
+ iput(sdp->sd_sc_inode);
+fail_ir_i:
+ iput(sdp->sd_ir_inode);
+fail:
+ if (pn)
+ iput(pn);
+ return error;
+}
+
+static int init_threads(struct gfs2_sbd *sdp, int undo)
+{
+ struct task_struct *p;
+ int error = 0;
+
+ if (undo)
+ goto fail_quotad;
+
+ sdp->sd_log_flush_time = jiffies;
+ sdp->sd_jindex_refresh_time = jiffies;
+
+ p = kthread_run(gfs2_logd, sdp, "gfs2_logd");
+ error = IS_ERR(p);
+ if (error) {
+ fs_err(sdp, "can't start logd thread: %d\n", error);
+ return error;
+ }
+ sdp->sd_logd_process = p;
+
+ sdp->sd_statfs_sync_time = jiffies;
+ sdp->sd_quota_sync_time = jiffies;
+
+ p = kthread_run(gfs2_quotad, sdp, "gfs2_quotad");
+ error = IS_ERR(p);
+ if (error) {
+ fs_err(sdp, "can't start quotad thread: %d\n", error);
+ goto fail;
+ }
+ sdp->sd_quotad_process = p;
+
+ return 0;
+
+
+fail_quotad:
+ kthread_stop(sdp->sd_quotad_process);
+fail:
+ kthread_stop(sdp->sd_logd_process);
+ return error;
+}
+
+/**
+ * fill_super - Read in superblock
+ * @sb: The VFS superblock
+ * @data: Mount options
+ * @silent: Don't complain if it's not a GFS2 filesystem
+ *
+ * Returns: errno
+ */
+
+static int fill_super(struct super_block *sb, void *data, int silent)
+{
+ struct gfs2_sbd *sdp;
+ struct gfs2_holder mount_gh;
+ int error;
+
+ sdp = init_sbd(sb);
+ if (!sdp) {
+ printk(KERN_WARNING "GFS2: can't alloc struct gfs2_sbd\n");
+ return -ENOMEM;
+ }
+
+ error = gfs2_mount_args(sdp, (char *)data, 0);
+ if (error) {
+ printk(KERN_WARNING "GFS2: can't parse mount arguments\n");
+ goto fail;
+ }
+
+ init_vfs(sb, SDF_NOATIME);
+
+ /* Set up the buffer cache and fill in some fake block size values
+ to allow us to read-in the on-disk superblock. */
+ sdp->sd_sb.sb_bsize = sb_min_blocksize(sb, GFS2_BASIC_BLOCK);
+ sdp->sd_sb.sb_bsize_shift = sb->s_blocksize_bits;
+ sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift -
+ GFS2_BASIC_BLOCK_SHIFT;
+ sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift;
+
+ error = init_names(sdp, silent);
+ if (error)
+ goto fail;
+
+ gfs2_create_debugfs_file(sdp);
+
+ error = gfs2_sys_fs_add(sdp);
+ if (error)
+ goto fail;
+
+ error = gfs2_lm_mount(sdp, silent);
+ if (error)
+ goto fail_sys;
+
+ error = init_locking(sdp, &mount_gh, DO);
+ if (error)
+ goto fail_lm;
+
+ error = init_sb(sdp, silent, DO);
+ if (error)
+ goto fail_locking;
+
+ error = init_inodes(sdp, DO);
+ if (error)
+ goto fail_sb;
+
+ error = init_per_node(sdp, DO);
+ if (error)
+ goto fail_inodes;
+
+ error = gfs2_statfs_init(sdp);
+ if (error) {
+ fs_err(sdp, "can't initialize statfs subsystem: %d\n", error);
+ goto fail_per_node;
+ }
+
+ error = init_threads(sdp, DO);
+ if (error)
+ goto fail_per_node;
+
+ if (!(sb->s_flags & MS_RDONLY)) {
+ error = gfs2_make_fs_rw(sdp);
+ if (error) {
+ fs_err(sdp, "can't make FS RW: %d\n", error);
+ goto fail_threads;
+ }
+ }
+
+ gfs2_glock_dq_uninit(&mount_gh);
+
+ return 0;
+
+fail_threads:
+ init_threads(sdp, UNDO);
+fail_per_node:
+ init_per_node(sdp, UNDO);
+fail_inodes:
+ init_inodes(sdp, UNDO);
+fail_sb:
+ init_sb(sdp, 0, UNDO);
+fail_locking:
+ init_locking(sdp, &mount_gh, UNDO);
+fail_lm:
+ gfs2_gl_hash_clear(sdp, WAIT);
+ gfs2_lm_unmount(sdp);
+ while (invalidate_inodes(sb))
+ yield();
+fail_sys:
+ gfs2_sys_fs_del(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 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 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\n", 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;
+ }
+ down(&sb->s_bdev->bd_mount_sem);
+ new = sget(fs_type, test_bdev_super, set_bdev_super, sb->s_bdev);
+ up(&sb->s_bdev->bd_mount_sem);
+ 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)
+{
+ gfs2_delete_debugfs_file(sb->s_fs_info);
+ 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,
+ .get_sb = gfs2_get_sb,
+ .kill_sb = gfs2_kill_sb,
+ .owner = THIS_MODULE,
+};
+
+struct file_system_type gfs2meta_fs_type = {
+ .name = "gfs2meta",
+ .fs_flags = FS_REQUIRES_DEV,
+ .get_sb = gfs2_get_sb_meta,
+ .kill_sb = gfs2_kill_sb_meta,
+ .owner = THIS_MODULE,
+};
+
git://git.onelab.eu / linux-2.6.git / blobdiff