/fs/gfs2/ops_fstype.c
C | 1354 lines | 1052 code | 201 blank | 101 comment | 166 complexity | 5f313ad3f117a43236cfd6be116f513c MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
- /*
- * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
- * Copyright (C) 2004-2008 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 "gfs2.h"
- #include "incore.h"
- #include "bmap.h"
- #include "glock.h"
- #include "glops.h"
- #include "inode.h"
- #include "recovery.h"
- #include "rgrp.h"
- #include "super.h"
- #include "sys.h"
- #include "util.h"
- #include "log.h"
- #include "quota.h"
- #include "dir.h"
- #define DO 0
- #define UNDO 1
- static const u32 gfs2_old_fs_formats[] = {
- 0
- };
- static const u32 gfs2_old_multihost_formats[] = {
- 0
- };
- /**
- * gfs2_tune_init - Fill a gfs2_tune structure with default values
- * @gt: tune
- *
- */
- static void gfs2_tune_init(struct gfs2_tune *gt)
- {
- spin_lock_init(>->gt_spin);
- gt->gt_incore_log_blocks = 1024;
- gt->gt_log_flush_secs = 60;
- gt->gt_recoverd_secs = 60;
- gt->gt_logd_secs = 1;
- gt->gt_quota_simul_sync = 64;
- gt->gt_quota_warn_period = 10;
- gt->gt_quota_scale_num = 1;
- gt->gt_quota_scale_den = 1;
- gt->gt_quota_quantum = 60;
- gt->gt_new_files_jdata = 0;
- gt->gt_max_readahead = 1 << 18;
- gt->gt_stall_secs = 600;
- gt->gt_complain_secs = 10;
- gt->gt_statfs_quantum = 30;
- gt->gt_statfs_slow = 0;
- }
- 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);
- mutex_init(&sdp->sd_inum_mutex);
- spin_lock_init(&sdp->sd_statfs_spin);
- 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_jindex_list);
- spin_lock_init(&sdp->sd_jindex_spin);
- mutex_init(&sdp->sd_jindex_mutex);
- INIT_LIST_HEAD(&sdp->sd_quota_list);
- mutex_init(&sdp->sd_quota_mutex);
- init_waitqueue_head(&sdp->sd_quota_wait);
- INIT_LIST_HEAD(&sdp->sd_trunc_list);
- spin_lock_init(&sdp->sd_trunc_lock);
- spin_lock_init(&sdp->sd_log_lock);
- 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);
- INIT_LIST_HEAD(&sdp->sd_log_le_ordered);
- 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);
- atomic_set(&sdp->sd_log_in_flight, 0);
- init_waitqueue_head(&sdp->sd_log_flush_wait);
- INIT_LIST_HEAD(&sdp->sd_revoke_list);
- mutex_init(&sdp->sd_freeze_lock);
- return sdp;
- }
- /**
- * gfs2_check_sb - Check superblock
- * @sdp: the filesystem
- * @sb: The superblock
- * @silent: Don't print a message if the check fails
- *
- * Checks the version code of the FS is one that we understand how to
- * read and that the sizes of the various on-disk structures have not
- * changed.
- */
- static int gfs2_check_sb(struct gfs2_sbd *sdp, struct gfs2_sb_host *sb, int silent)
- {
- unsigned int x;
- if (sb->sb_magic != GFS2_MAGIC ||
- sb->sb_type != GFS2_METATYPE_SB) {
- if (!silent)
- printk(KERN_WARNING "GFS2: not a GFS2 filesystem\n");
- return -EINVAL;
- }
- /* If format numbers match exactly, we're done. */
- if (sb->sb_fs_format == GFS2_FORMAT_FS &&
- sb->sb_multihost_format == GFS2_FORMAT_MULTI)
- return 0;
- if (sb->sb_fs_format != GFS2_FORMAT_FS) {
- for (x = 0; gfs2_old_fs_formats[x]; x++)
- if (gfs2_old_fs_formats[x] == sb->sb_fs_format)
- break;
- if (!gfs2_old_fs_formats[x]) {
- printk(KERN_WARNING
- "GFS2: code version (%u, %u) is incompatible "
- "with ondisk format (%u, %u)\n",
- GFS2_FORMAT_FS, GFS2_FORMAT_MULTI,
- sb->sb_fs_format, sb->sb_multihost_format);
- printk(KERN_WARNING
- "GFS2: I don't know how to upgrade this FS\n");
- return -EINVAL;
- }
- }
- if (sb->sb_multihost_format != GFS2_FORMAT_MULTI) {
- for (x = 0; gfs2_old_multihost_formats[x]; x++)
- if (gfs2_old_multihost_formats[x] ==
- sb->sb_multihost_format)
- break;
- if (!gfs2_old_multihost_formats[x]) {
- printk(KERN_WARNING
- "GFS2: code version (%u, %u) is incompatible "
- "with ondisk format (%u, %u)\n",
- GFS2_FORMAT_FS, GFS2_FORMAT_MULTI,
- sb->sb_fs_format, sb->sb_multihost_format);
- printk(KERN_WARNING
- "GFS2: I don't know how to upgrade this FS\n");
- return -EINVAL;
- }
- }
- if (!sdp->sd_args.ar_upgrade) {
- printk(KERN_WARNING
- "GFS2: code version (%u, %u) is incompatible "
- "with ondisk format (%u, %u)\n",
- GFS2_FORMAT_FS, GFS2_FORMAT_MULTI,
- sb->sb_fs_format, sb->sb_multihost_format);
- printk(KERN_INFO
- "GFS2: Use the \"upgrade\" mount option to upgrade "
- "the FS\n");
- printk(KERN_INFO "GFS2: See the manual for more details\n");
- return -EINVAL;
- }
- return 0;
- }
- static void end_bio_io_page(struct bio *bio, int error)
- {
- struct page *page = bio->bi_private;
- if (!error)
- SetPageUptodate(page);
- else
- printk(KERN_WARNING "gfs2: error %d reading superblock\n", error);
- unlock_page(page);
- }
- static void gfs2_sb_in(struct gfs2_sb_host *sb, const void *buf)
- {
- const struct gfs2_sb *str = buf;
- sb->sb_magic = be32_to_cpu(str->sb_header.mh_magic);
- sb->sb_type = be32_to_cpu(str->sb_header.mh_type);
- sb->sb_format = be32_to_cpu(str->sb_header.mh_format);
- sb->sb_fs_format = be32_to_cpu(str->sb_fs_format);
- sb->sb_multihost_format = be32_to_cpu(str->sb_multihost_format);
- sb->sb_bsize = be32_to_cpu(str->sb_bsize);
- sb->sb_bsize_shift = be32_to_cpu(str->sb_bsize_shift);
- sb->sb_master_dir.no_addr = be64_to_cpu(str->sb_master_dir.no_addr);
- sb->sb_master_dir.no_formal_ino = be64_to_cpu(str->sb_master_dir.no_formal_ino);
- sb->sb_root_dir.no_addr = be64_to_cpu(str->sb_root_dir.no_addr);
- sb->sb_root_dir.no_formal_ino = be64_to_cpu(str->sb_root_dir.no_formal_ino);
- memcpy(sb->sb_lockproto, str->sb_lockproto, GFS2_LOCKNAME_LEN);
- memcpy(sb->sb_locktable, str->sb_locktable, GFS2_LOCKNAME_LEN);
- memcpy(sb->sb_uuid, str->sb_uuid, 16);
- }
- /**
- * gfs2_read_super - Read the gfs2 super block from disk
- * @sdp: The GFS2 super block
- * @sector: The location of the super block
- * @error: The error code to return
- *
- * This uses the bio functions to read the super block from disk
- * because we want to be 100% sure that we never read cached data.
- * A super block is read twice only during each GFS2 mount and is
- * never written to by the filesystem. The first time its read no
- * locks are held, and the only details which are looked at are those
- * relating to the locking protocol. Once locking is up and working,
- * the sb is read again under the lock to establish the location of
- * the master directory (contains pointers to journals etc) and the
- * root directory.
- *
- * Returns: 0 on success or error
- */
- static int gfs2_read_super(struct gfs2_sbd *sdp, sector_t sector)
- {
- struct super_block *sb = sdp->sd_vfs;
- struct gfs2_sb *p;
- struct page *page;
- struct bio *bio;
- page = alloc_page(GFP_NOFS);
- if (unlikely(!page))
- return -ENOBUFS;
- ClearPageUptodate(page);
- ClearPageDirty(page);
- lock_page(page);
- bio = bio_alloc(GFP_NOFS, 1);
- bio->bi_sector = sector * (sb->s_blocksize >> 9);
- bio->bi_bdev = sb->s_bdev;
- bio_add_page(bio, page, PAGE_SIZE, 0);
- bio->bi_end_io = end_bio_io_page;
- bio->bi_private = page;
- submit_bio(READ_SYNC | (1 << BIO_RW_META), bio);
- wait_on_page_locked(page);
- bio_put(bio);
- if (!PageUptodate(page)) {
- __free_page(page);
- return -EIO;
- }
- p = kmap(page);
- gfs2_sb_in(&sdp->sd_sb, p);
- kunmap(page);
- __free_page(page);
- return 0;
- }
- /**
- * gfs2_read_sb - Read super block
- * @sdp: The GFS2 superblock
- * @silent: Don't print message if mount fails
- *
- */
- static int gfs2_read_sb(struct gfs2_sbd *sdp, int silent)
- {
- u32 hash_blocks, ind_blocks, leaf_blocks;
- u32 tmp_blocks;
- unsigned int x;
- int error;
- error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift);
- if (error) {
- if (!silent)
- fs_err(sdp, "can't read superblock\n");
- return error;
- }
- error = gfs2_check_sb(sdp, &sdp->sd_sb, silent);
- if (error)
- return error;
- sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift -
- GFS2_BASIC_BLOCK_SHIFT;
- sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift;
- sdp->sd_diptrs = (sdp->sd_sb.sb_bsize -
- sizeof(struct gfs2_dinode)) / sizeof(u64);
- sdp->sd_inptrs = (sdp->sd_sb.sb_bsize -
- sizeof(struct gfs2_meta_header)) / sizeof(u64);
- sdp->sd_jbsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header);
- sdp->sd_hash_bsize = sdp->sd_sb.sb_bsize / 2;
- sdp->sd_hash_bsize_shift = sdp->sd_sb.sb_bsize_shift - 1;
- sdp->sd_hash_ptrs = sdp->sd_hash_bsize / sizeof(u64);
- sdp->sd_qc_per_block = (sdp->sd_sb.sb_bsize -
- sizeof(struct gfs2_meta_header)) /
- sizeof(struct gfs2_quota_change);
- /* Compute maximum reservation required to add a entry to a directory */
- hash_blocks = DIV_ROUND_UP(sizeof(u64) * (1 << GFS2_DIR_MAX_DEPTH),
- sdp->sd_jbsize);
- ind_blocks = 0;
- for (tmp_blocks = hash_blocks; tmp_blocks > sdp->sd_diptrs;) {
- tmp_blocks = DIV_ROUND_UP(tmp_blocks, sdp->sd_inptrs);
- ind_blocks += tmp_blocks;
- }
- leaf_blocks = 2 + GFS2_DIR_MAX_DEPTH;
- sdp->sd_max_dirres = hash_blocks + ind_blocks + leaf_blocks;
- sdp->sd_heightsize[0] = sdp->sd_sb.sb_bsize -
- sizeof(struct gfs2_dinode);
- sdp->sd_heightsize[1] = sdp->sd_sb.sb_bsize * sdp->sd_diptrs;
- for (x = 2;; x++) {
- u64 space, d;
- u32 m;
- space = sdp->sd_heightsize[x - 1] * sdp->sd_inptrs;
- d = space;
- m = do_div(d, sdp->sd_inptrs);
- if (d != sdp->sd_heightsize[x - 1] || m)
- break;
- sdp->sd_heightsize[x] = space;
- }
- sdp->sd_max_height = x;
- sdp->sd_heightsize[x] = ~0;
- gfs2_assert(sdp, sdp->sd_max_height <= GFS2_MAX_META_HEIGHT);
- sdp->sd_jheightsize[0] = sdp->sd_sb.sb_bsize -
- sizeof(struct gfs2_dinode);
- sdp->sd_jheightsize[1] = sdp->sd_jbsize * sdp->sd_diptrs;
- for (x = 2;; x++) {
- u64 space, d;
- u32 m;
- space = sdp->sd_jheightsize[x - 1] * sdp->sd_inptrs;
- d = space;
- m = do_div(d, sdp->sd_inptrs);
- if (d != sdp->sd_jheightsize[x - 1] || m)
- break;
- sdp->sd_jheightsize[x] = space;
- }
- sdp->sd_max_jheight = x;
- sdp->sd_jheightsize[x] = ~0;
- gfs2_assert(sdp, sdp->sd_max_jheight <= GFS2_MAX_META_HEIGHT);
- return 0;
- }
- static int init_names(struct gfs2_sbd *sdp, int silent)
- {
- 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]) {
- error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift);
- if (error)
- return error;
- 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;
- strlcpy(sdp->sd_proto_name, proto, GFS2_FSNAME_LEN);
- strlcpy(sdp->sd_table_name, table, GFS2_FSNAME_LEN);
- table = sdp->sd_table_name;
- while ((table = strchr(table, '/')))
- *table = '_';
- out:
- return error;
- }
- static int init_locking(struct gfs2_sbd *sdp, struct gfs2_holder *mount_gh,
- int undo)
- {
- int error = 0;
- if (undo)
- goto fail_trans;
- 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;
- }
- 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:
- return error;
- }
- static int gfs2_lookup_root(struct super_block *sb, struct dentry **dptr,
- u64 no_addr, const char *name)
- {
- struct gfs2_sbd *sdp = sb->s_fs_info;
- struct dentry *dentry;
- struct inode *inode;
- inode = gfs2_inode_lookup(sb, DT_DIR, no_addr, 0, 0);
- if (IS_ERR(inode)) {
- fs_err(sdp, "can't read in %s inode: %ld\n", name, PTR_ERR(inode));
- return PTR_ERR(inode);
- }
- dentry = d_alloc_root(inode);
- if (!dentry) {
- fs_err(sdp, "can't alloc %s dentry\n", name);
- iput(inode);
- return -ENOMEM;
- }
- dentry->d_op = &gfs2_dops;
- *dptr = dentry;
- return 0;
- }
- static int init_sb(struct gfs2_sbd *sdp, int silent)
- {
- struct super_block *sb = sdp->sd_vfs;
- struct gfs2_holder sb_gh;
- u64 no_addr;
- int ret;
- ret = gfs2_glock_nq_num(sdp, GFS2_SB_LOCK, &gfs2_meta_glops,
- LM_ST_SHARED, 0, &sb_gh);
- if (ret) {
- fs_err(sdp, "can't acquire superblock glock: %d\n", ret);
- return ret;
- }
- ret = gfs2_read_sb(sdp, silent);
- if (ret) {
- fs_err(sdp, "can't read superblock: %d\n", ret);
- goto out;
- }
- /* Set up the buffer cache and SB for real */
- if (sdp->sd_sb.sb_bsize < bdev_hardsect_size(sb->s_bdev)) {
- ret = -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) {
- ret = -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 */
- no_addr = sdp->sd_sb.sb_root_dir.no_addr;
- ret = gfs2_lookup_root(sb, &sdp->sd_root_dir, no_addr, "root");
- if (ret)
- goto out;
- /* Get the master inode */
- no_addr = sdp->sd_sb.sb_master_dir.no_addr;
- ret = gfs2_lookup_root(sb, &sdp->sd_master_dir, no_addr, "master");
- if (ret) {
- dput(sdp->sd_root_dir);
- goto out;
- }
- sb->s_root = dget(sdp->sd_args.ar_meta ? sdp->sd_master_dir : sdp->sd_root_dir);
- out:
- gfs2_glock_dq_uninit(&sb_gh);
- return ret;
- }
- /**
- * map_journal_extents - create a reusable "extent" mapping from all logical
- * blocks to all physical blocks for the given journal. This will save
- * us time when writing journal blocks. Most journals will have only one
- * extent that maps all their logical blocks. That's because gfs2.mkfs
- * arranges the journal blocks sequentially to maximize performance.
- * So the extent would map the first block for the entire file length.
- * However, gfs2_jadd can happen while file activity is happening, so
- * those journals may not be sequential. Less likely is the case where
- * the users created their own journals by mounting the metafs and
- * laying it out. But it's still possible. These journals might have
- * several extents.
- *
- * TODO: This should be done in bigger chunks rather than one block at a time,
- * but since it's only done at mount time, I'm not worried about the
- * time it takes.
- */
- static int map_journal_extents(struct gfs2_sbd *sdp)
- {
- struct gfs2_jdesc *jd = sdp->sd_jdesc;
- unsigned int lb;
- u64 db, prev_db; /* logical block, disk block, prev disk block */
- struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
- struct gfs2_journal_extent *jext = NULL;
- struct buffer_head bh;
- int rc = 0;
- prev_db = 0;
- for (lb = 0; lb < ip->i_disksize >> sdp->sd_sb.sb_bsize_shift; lb++) {
- bh.b_state = 0;
- bh.b_blocknr = 0;
- bh.b_size = 1 << ip->i_inode.i_blkbits;
- rc = gfs2_block_map(jd->jd_inode, lb, &bh, 0);
- db = bh.b_blocknr;
- if (rc || !db) {
- printk(KERN_INFO "GFS2 journal mapping error %d: lb="
- "%u db=%llu\n", rc, lb, (unsigned long long)db);
- break;
- }
- if (!prev_db || db != prev_db + 1) {
- jext = kzalloc(sizeof(struct gfs2_journal_extent),
- GFP_KERNEL);
- if (!jext) {
- printk(KERN_INFO "GFS2 error: out of memory "
- "mapping journal extents.\n");
- rc = -ENOMEM;
- break;
- }
- jext->dblock = db;
- jext->lblock = lb;
- jext->blocks = 1;
- list_add_tail(&jext->extent_list, &jd->extent_list);
- } else {
- jext->blocks++;
- }
- prev_db = db;
- }
- return rc;
- }
- static void gfs2_others_may_mount(struct gfs2_sbd *sdp)
- {
- char *message = "FIRSTMOUNT=Done";
- char *envp[] = { message, NULL };
- struct lm_lockstruct *ls = &sdp->sd_lockstruct;
- ls->ls_first_done = 1;
- kobject_uevent_env(&sdp->sd_kobj, KOBJ_CHANGE, envp);
- }
- /**
- * gfs2_jindex_hold - Grab a lock on the jindex
- * @sdp: The GFS2 superblock
- * @ji_gh: the holder for the jindex glock
- *
- * Returns: errno
- */
- static int gfs2_jindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ji_gh)
- {
- struct gfs2_inode *dip = GFS2_I(sdp->sd_jindex);
- struct qstr name;
- char buf[20];
- struct gfs2_jdesc *jd;
- int error;
- name.name = buf;
- mutex_lock(&sdp->sd_jindex_mutex);
- for (;;) {
- error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, ji_gh);
- if (error)
- break;
- name.len = sprintf(buf, "journal%u", sdp->sd_journals);
- name.hash = gfs2_disk_hash(name.name, name.len);
- error = gfs2_dir_check(sdp->sd_jindex, &name, NULL);
- if (error == -ENOENT) {
- error = 0;
- break;
- }
- gfs2_glock_dq_uninit(ji_gh);
- if (error)
- break;
- error = -ENOMEM;
- jd = kzalloc(sizeof(struct gfs2_jdesc), GFP_KERNEL);
- if (!jd)
- break;
- INIT_LIST_HEAD(&jd->extent_list);
- jd->jd_inode = gfs2_lookupi(sdp->sd_jindex, &name, 1);
- if (!jd->jd_inode || IS_ERR(jd->jd_inode)) {
- if (!jd->jd_inode)
- error = -ENOENT;
- else
- error = PTR_ERR(jd->jd_inode);
- kfree(jd);
- break;
- }
- spin_lock(&sdp->sd_jindex_spin);
- jd->jd_jid = sdp->sd_journals++;
- list_add_tail(&jd->jd_list, &sdp->sd_jindex_list);
- spin_unlock(&sdp->sd_jindex_spin);
- }
- mutex_unlock(&sdp->sd_jindex_mutex);
- return error;
- }
- static int init_journal(struct gfs2_sbd *sdp, int undo)
- {
- struct inode *master = sdp->sd_master_dir->d_inode;
- 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(master, "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);
- /* 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);
- atomic_set(&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 | GL_NOCACHE,
- &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;
- }
- atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks);
- /* Map the extents for this journal's blocks */
- map_journal_extents(sdp);
- }
- 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_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 *master = sdp->sd_master_dir->d_inode;
- if (undo)
- goto fail_qinode;
- error = init_journal(sdp, undo);
- if (error)
- goto fail;
- /* Read in the master inode number inode */
- sdp->sd_inum_inode = gfs2_lookup_simple(master, "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(master, "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(master, "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);
- sdp->sd_rindex_uptodate = 0;
- /* Read in the quota inode */
- sdp->sd_quota_inode = gfs2_lookup_simple(master, "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:
- 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;
- struct inode *master = sdp->sd_master_dir->d_inode;
- if (sdp->sd_args.ar_spectator)
- return 0;
- if (undo)
- goto fail_qc_gh;
- pn = gfs2_lookup_simple(master, "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;
- 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;
- 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;
- }
- static const match_table_t nolock_tokens = {
- { Opt_jid, "jid=%d\n", },
- { Opt_err, NULL },
- };
- static const struct lm_lockops nolock_ops = {
- .lm_proto_name = "lock_nolock",
- .lm_put_lock = kmem_cache_free,
- .lm_tokens = &nolock_tokens,
- };
- /**
- * gfs2_lm_mount - mount a locking protocol
- * @sdp: the filesystem
- * @args: mount arguements
- * @silent: if 1, don't complain if the FS isn't a GFS2 fs
- *
- * Returns: errno
- */
- static int gfs2_lm_mount(struct gfs2_sbd *sdp, int silent)
- {
- const struct lm_lockops *lm;
- struct lm_lockstruct *ls = &sdp->sd_lockstruct;
- struct gfs2_args *args = &sdp->sd_args;
- const char *proto = sdp->sd_proto_name;
- const char *table = sdp->sd_table_name;
- const char *fsname;
- char *o, *options;
- int ret;
- if (!strcmp("lock_nolock", proto)) {
- lm = &nolock_ops;
- sdp->sd_args.ar_localflocks = 1;
- sdp->sd_args.ar_localcaching = 1;
- #ifdef CONFIG_GFS2_FS_LOCKING_DLM
- } else if (!strcmp("lock_dlm", proto)) {
- lm = &gfs2_dlm_ops;
- #endif
- } else {
- printk(KERN_INFO "GFS2: can't find protocol %s\n", proto);
- return -ENOENT;
- }
- fs_info(sdp, "Trying to join cluster \"%s\", \"%s\"\n", proto, table);
- ls->ls_ops = lm;
- ls->ls_first = 1;
- ls->ls_id = 0;
- for (options = args->ar_hostdata; (o = strsep(&options, ":")); ) {
- substring_t tmp[MAX_OPT_ARGS];
- int token, option;
- if (!o || !*o)
- continue;
- token = match_token(o, *lm->lm_tokens, tmp);
- switch (token) {
- case Opt_jid:
- ret = match_int(&tmp[0], &option);
- if (ret || option < 0)
- goto hostdata_error;
- ls->ls_jid = option;
- break;
- case Opt_id:
- ret = match_int(&tmp[0], &option);
- if (ret)
- goto hostdata_error;
- ls->ls_id = option;
- break;
- case Opt_first:
- ret = match_int(&tmp[0], &option);
- if (ret || (option != 0 && option != 1))
- goto hostdata_error;
- ls->ls_first = option;
- break;
- case Opt_nodir:
- ret = match_int(&tmp[0], &option);
- if (ret || (option != 0 && option != 1))
- goto hostdata_error;
- ls->ls_nodir = option;
- break;
- case Opt_err:
- default:
- hostdata_error:
- fs_info(sdp, "unknown hostdata (%s)\n", o);
- return -EINVAL;
- }
- }
- if (sdp->sd_args.ar_spectator)
- snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s.s", table);
- else
- snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s.%u", table,
- sdp->sd_lockstruct.ls_jid);
- fsname = strchr(table, ':');
- if (fsname)
- fsname++;
- if (lm->lm_mount == NULL) {
- fs_info(sdp, "Now mounting FS...\n");
- return 0;
- }
- ret = lm->lm_mount(sdp, fsname);
- if (ret == 0)
- fs_info(sdp, "Joined cluster. Now mounting FS...\n");
- return ret;
- }
- void gfs2_lm_unmount(struct gfs2_sbd *sdp)
- {
- const struct lm_lockops *lm = sdp->sd_lockstruct.ls_ops;
- if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) &&
- lm->lm_unmount)
- lm->lm_unmount(sdp);
- }
- /**
- * 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;
- }
- sdp->sd_args.ar_quota = GFS2_QUOTA_DEFAULT;
- sdp->sd_args.ar_data = GFS2_DATA_DEFAULT;
- error = gfs2_mount_args(sdp, &sdp->sd_args, data);
- if (error) {
- printk(KERN_WARNING "GFS2: can't parse mount arguments\n");
- goto fail;
- }
- if (sdp->sd_args.ar_spectator)
- sb->s_flags |= MS_RDONLY;
- if (sdp->sd_args.ar_posix_acl)
- sb->s_flags |= MS_POSIXACL;
- sb->s_magic = GFS2_MAGIC;
- sb->s_op = &gfs2_super_ops;
- sb->s_export_op = &gfs2_export_ops;
- sb->s_time_gran = 1;
- sb->s_maxbytes = MAX_LFS_FILESIZE;
- /* 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);
- 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:
- if (sdp->sd_root_dir)
- dput(sdp->sd_root_dir);
- if (sdp->sd_master_dir)
- dput(sdp->sd_master_dir);
- if (sb->s_root)
- dput(sb->s_root);
- sb->s_root = NULL;
- fail_locking:
- init_locking(sdp, &mount_gh, UNDO);
- fail_lm:
- gfs2_gl_hash_clear(sdp);
- gfs2_lm_unmount(sdp);
- while (invalidate_inodes(sb))
- yield();
- fail_sys:
- gfs2_sys_fs_del(sdp);
- fail:
- gfs2_delete_debugfs_file(sdp);
- 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)
- {
- return get_sb_bdev(fs_type, flags, dev_name, data, fill_super, mnt);
- }
- static struct super_block *get_gfs2_sb(const char *dev_name)
- {
- struct super_block *sb;
- struct nameidata nd;
- int error;
- error = path_lookup(dev_name, LOOKUP_FOLLOW, &nd);
- if (error) {
- printk(KERN_WARNING "GFS2: path_lookup on %s returned error %d\n",
- dev_name, error);
- return NULL;
- }
- sb = nd.path.dentry->d_inode->i_sb;
- if (sb && (sb->s_type == &gfs2_fs_type))
- atomic_inc(&sb->s_active);
- else
- sb = NULL;
- path_put(&nd.path);
- 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)
- {
- struct super_block *sb = NULL;
- struct gfs2_sbd *sdp;
- sb = get_gfs2_sb(dev_name);
- if (!sb) {
- printk(KERN_WARNING "GFS2: gfs2 mount does not exist\n");
- return -ENOENT;
- }
- sdp = sb->s_fs_info;
- mnt->mnt_sb = sb;
- mnt->mnt_root = dget(sdp->sd_master_dir);
- return 0;
- }
- static void gfs2_kill_sb(struct super_block *sb)
- {
- struct gfs2_sbd *sdp = sb->s_fs_info;
- if (sdp == NULL) {
- kill_block_super(sb);
- return;
- }
- gfs2_meta_syncfs(sdp);
- dput(sdp->sd_root_dir);
- dput(sdp->sd_master_dir);
- sdp->sd_root_dir = NULL;
- sdp->sd_master_dir = NULL;
- shrink_dcache_sb(sb);
- kill_block_super(sb);
- gfs2_delete_debugfs_file(sdp);
- kfree(sdp);
- }
- 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,
- .owner = THIS_MODULE,
- };