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- // SPDX-License-Identifier: GPL-2.0-only
- /*
- * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
- * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
- */
- #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
- #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/export.h>
- #include <linux/namei.h>
- #include <linux/mount.h>
- #include <linux/gfs2_ondisk.h>
- #include <linux/quotaops.h>
- #include <linux/lockdep.h>
- #include <linux/module.h>
- #include <linux/backing-dev.h>
- #include <linux/fs_parser.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"
- #include "meta_io.h"
- #include "trace_gfs2.h"
- #include "lops.h"
- #define DO 0
- #define UNDO 1
- /**
- * 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_quota_warn_period = 10;
- gt->gt_quota_scale_num = 1;
- gt->gt_quota_scale_den = 1;
- gt->gt_new_files_jdata = 0;
- gt->gt_max_readahead = BIT(18);
- gt->gt_complain_secs = 10;
- }
- void free_sbd(struct gfs2_sbd *sdp)
- {
- if (sdp->sd_lkstats)
- free_percpu(sdp->sd_lkstats);
- kfree(sdp);
- }
- static struct gfs2_sbd *init_sbd(struct super_block *sb)
- {
- struct gfs2_sbd *sdp;
- struct address_space *mapping;
- sdp = kzalloc(sizeof(struct gfs2_sbd), GFP_KERNEL);
- if (!sdp)
- return NULL;
- sdp->sd_vfs = sb;
- sdp->sd_lkstats = alloc_percpu(struct gfs2_pcpu_lkstats);
- if (!sdp->sd_lkstats)
- goto fail;
- sb->s_fs_info = sdp;
- set_bit(SDF_NOJOURNALID, &sdp->sd_flags);
- gfs2_tune_init(&sdp->sd_tune);
- init_waitqueue_head(&sdp->sd_glock_wait);
- init_waitqueue_head(&sdp->sd_async_glock_wait);
- atomic_set(&sdp->sd_glock_disposal, 0);
- init_completion(&sdp->sd_locking_init);
- init_completion(&sdp->sd_wdack);
- spin_lock_init(&sdp->sd_statfs_spin);
- spin_lock_init(&sdp->sd_rindex_spin);
- sdp->sd_rindex_tree.rb_node = NULL;
- INIT_LIST_HEAD(&sdp->sd_jindex_list);
- spin_lock_init(&sdp->sd_jindex_spin);
- mutex_init(&sdp->sd_jindex_mutex);
- init_completion(&sdp->sd_journal_ready);
- INIT_LIST_HEAD(&sdp->sd_quota_list);
- mutex_init(&sdp->sd_quota_mutex);
- mutex_init(&sdp->sd_quota_sync_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_bitmap_lock);
- INIT_LIST_HEAD(&sdp->sd_sc_inodes_list);
- mapping = &sdp->sd_aspace;
- address_space_init_once(mapping);
- mapping->a_ops = &gfs2_rgrp_aops;
- mapping->host = sb->s_bdev->bd_inode;
- mapping->flags = 0;
- mapping_set_gfp_mask(mapping, GFP_NOFS);
- mapping->private_data = NULL;
- mapping->writeback_index = 0;
- spin_lock_init(&sdp->sd_log_lock);
- atomic_set(&sdp->sd_log_pinned, 0);
- INIT_LIST_HEAD(&sdp->sd_log_revokes);
- INIT_LIST_HEAD(&sdp->sd_log_ordered);
- spin_lock_init(&sdp->sd_ordered_lock);
- init_waitqueue_head(&sdp->sd_log_waitq);
- init_waitqueue_head(&sdp->sd_logd_waitq);
- spin_lock_init(&sdp->sd_ail_lock);
- 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);
- atomic_set(&sdp->sd_reserving_log, 0);
- init_waitqueue_head(&sdp->sd_reserving_log_wait);
- init_waitqueue_head(&sdp->sd_log_flush_wait);
- atomic_set(&sdp->sd_freeze_state, SFS_UNFROZEN);
- mutex_init(&sdp->sd_freeze_mutex);
- return sdp;
- fail:
- free_sbd(sdp);
- return NULL;
- }
- /**
- * 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, int silent)
- {
- struct gfs2_sb_host *sb = &sdp->sd_sb;
- if (sb->sb_magic != GFS2_MAGIC ||
- sb->sb_type != GFS2_METATYPE_SB) {
- if (!silent)
- pr_warn("not a GFS2 filesystem\n");
- return -EINVAL;
- }
- if (sb->sb_fs_format != GFS2_FORMAT_FS ||
- sb->sb_multihost_format != GFS2_FORMAT_MULTI) {
- fs_warn(sdp, "Unknown on-disk format, unable to mount\n");
- return -EINVAL;
- }
- if (sb->sb_bsize < 512 || sb->sb_bsize > PAGE_SIZE ||
- (sb->sb_bsize & (sb->sb_bsize - 1))) {
- pr_warn("Invalid superblock size\n");
- return -EINVAL;
- }
- return 0;
- }
- static void end_bio_io_page(struct bio *bio)
- {
- struct page *page = bio->bi_private;
- if (!bio->bi_status)
- SetPageUptodate(page);
- else
- pr_warn("error %d reading superblock\n", bio->bi_status);
- unlock_page(page);
- }
- static void gfs2_sb_in(struct gfs2_sbd *sdp, const void *buf)
- {
- struct gfs2_sb_host *sb = &sdp->sd_sb;
- struct super_block *s = sdp->sd_vfs;
- 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(&s->s_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, int silent)
- {
- 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 -ENOMEM;
- ClearPageUptodate(page);
- ClearPageDirty(page);
- lock_page(page);
- bio = bio_alloc(GFP_NOFS, 1);
- bio->bi_iter.bi_sector = sector * (sb->s_blocksize >> 9);
- bio_set_dev(bio, sb->s_bdev);
- bio_add_page(bio, page, PAGE_SIZE, 0);
- bio->bi_end_io = end_bio_io_page;
- bio->bi_private = page;
- bio_set_op_attrs(bio, REQ_OP_READ, REQ_META);
- submit_bio(bio);
- wait_on_page_locked(page);
- bio_put(bio);
- if (!PageUptodate(page)) {
- __free_page(page);
- return -EIO;
- }
- p = kmap(page);
- gfs2_sb_in(sdp, p);
- kunmap(page);
- __free_page(page);
- return gfs2_check_sb(sdp, silent);
- }
- /**
- * 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, silent);
- if (error) {
- if (!silent)
- fs_err(sdp, "can't read superblock\n");
- return error;
- }
- sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift -
- GFS2_BASIC_BLOCK_SHIFT;
- sdp->sd_fsb2bb = BIT(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_ldptrs = (sdp->sd_sb.sb_bsize -
- sizeof(struct gfs2_log_descriptor)) / 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);
- sdp->sd_blocks_per_bitmap = (sdp->sd_sb.sb_bsize -
- sizeof(struct gfs2_meta_header))
- * GFS2_NBBY; /* not the rgrp bitmap, subsequent bitmaps only */
- /* Compute maximum reservation required to add a entry to a directory */
- hash_blocks = DIV_ROUND_UP(sizeof(u64) * BIT(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_max_dents_per_leaf = (sdp->sd_sb.sb_bsize -
- sizeof(struct gfs2_leaf)) /
- GFS2_MIN_DIRENT_SIZE;
- 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, silent);
- if (error)
- return error;
- 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 = '_';
- 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_FREEZE_LOCK, &gfs2_freeze_glops,
- CREATE, &sdp->sd_freeze_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_freeze_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,
- GFS2_BLKST_FREE /* ignore */);
- 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_make_root(inode);
- if (!dentry) {
- fs_err(sdp, "can't alloc %s dentry\n", name);
- return -ENOMEM;
- }
- *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_logical_block_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_logical_block_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;
- }
- static void gfs2_others_may_mount(struct gfs2_sbd *sdp)
- {
- char *message = "FIRSTMOUNT=Done";
- char *envp[] = { message, NULL };
- fs_info(sdp, "first mount done, others may mount\n");
- if (sdp->sd_lockstruct.ls_ops->lm_first_done)
- sdp->sd_lockstruct.ls_ops->lm_first_done(sdp);
- 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 (;;) {
- struct gfs2_inode *jip;
- 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);
- INIT_LIST_HEAD(&jd->jd_revoke_list);
- INIT_WORK(&jd->jd_work, gfs2_recover_func);
- jd->jd_inode = gfs2_lookupi(sdp->sd_jindex, &name, 1);
- if (IS_ERR_OR_NULL(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++;
- jip = GFS2_I(jd->jd_inode);
- jd->jd_no_addr = jip->i_no_addr;
- list_add_tail(&jd->jd_list, &sdp->sd_jindex_list);
- spin_unlock(&sdp->sd_jindex_spin);
- }
- mutex_unlock(&sdp->sd_jindex_mutex);
- return error;
- }
- /**
- * init_statfs - look up and initialize master and local (per node) statfs inodes
- * @sdp: The GFS2 superblock
- *
- * This should be called after the jindex is initialized in init_journal() and
- * before gfs2_journal_recovery() is called because we need to be able to write
- * to these inodes during recovery.
- *
- * Returns: errno
- */
- static int init_statfs(struct gfs2_sbd *sdp)
- {
- int error = 0;
- struct inode *master = d_inode(sdp->sd_master_dir);
- struct inode *pn = NULL;
- char buf[30];
- struct gfs2_jdesc *jd;
- struct gfs2_inode *ip;
- 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 out;
- }
- if (sdp->sd_args.ar_spectator)
- goto out;
- 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);
- goto put_statfs;
- }
- /* For each jid, lookup the corresponding local statfs inode in the
- * per_node metafs directory and save it in the sdp->sd_sc_inodes_list. */
- list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
- struct local_statfs_inode *lsi =
- kmalloc(sizeof(struct local_statfs_inode), GFP_NOFS);
- if (!lsi) {
- error = -ENOMEM;
- goto free_local;
- }
- sprintf(buf, "statfs_change%u", jd->jd_jid);
- lsi->si_sc_inode = gfs2_lookup_simple(pn, buf);
- if (IS_ERR(lsi->si_sc_inode)) {
- error = PTR_ERR(lsi->si_sc_inode);
- fs_err(sdp, "can't find local \"sc\" file#%u: %d\n",
- jd->jd_jid, error);
- kfree(lsi);
- goto free_local;
- }
- lsi->si_jid = jd->jd_jid;
- if (jd->jd_jid == sdp->sd_jdesc->jd_jid)
- sdp->sd_sc_inode = lsi->si_sc_inode;
- list_add_tail(&lsi->si_list, &sdp->sd_sc_inodes_list);
- }
- iput(pn);
- pn = NULL;
- 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 free_local;
- }
- return 0;
- free_local:
- free_local_statfs_inodes(sdp);
- iput(pn);
- put_statfs:
- iput(sdp->sd_statfs_inode);
- out:
- return error;
- }
- /* Uninitialize and free up memory used by the list of statfs inodes */
- static void uninit_statfs(struct gfs2_sbd *sdp)
- {
- if (!sdp->sd_args.ar_spectator) {
- gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
- free_local_statfs_inodes(sdp);
- }
- iput(sdp->sd_statfs_inode);
- }
- static int init_journal(struct gfs2_sbd *sdp, int undo)
- {
- struct inode *master = d_inode(sdp->sd_master_dir);
- struct gfs2_holder ji_gh;
- struct gfs2_inode *ip;
- int jindex = 1;
- int error = 0;
- if (undo) {
- jindex = 0;
- goto fail_statfs;
- }
- 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);
- }
- /* 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 = -EUSERS;
- if (!gfs2_jindex_size(sdp)) {
- fs_err(sdp, "no journals!\n");
- goto fail_jindex;
- }
- atomic_set(&sdp->sd_log_blks_needed, 0);
- 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);
- atomic_set(&sdp->sd_log_thresh1, 2*sdp->sd_jdesc->jd_blocks/5);
- atomic_set(&sdp->sd_log_thresh2, 4*sdp->sd_jdesc->jd_blocks/5);
- } 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 | GL_NOCACHE,
- &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);
- sdp->sd_jinode_gl = ip->i_gl;
- 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);
- atomic_set(&sdp->sd_log_thresh1, 2*sdp->sd_jdesc->jd_blocks/5);
- atomic_set(&sdp->sd_log_thresh2, 4*sdp->sd_jdesc->jd_blocks/5);
- /* Map the extents for this journal's blocks */
- gfs2_map_journal_extents(sdp, sdp->sd_jdesc);
- }
- trace_gfs2_log_blocks(sdp, atomic_read(&sdp->sd_log_blks_free));
- /* Lookup statfs inodes here so journal recovery can use them. */
- error = init_statfs(sdp);
- if (error)
- goto fail_jinode_gh;
- if (sdp->sd_lockstruct.ls_first) {
- unsigned int x;
- for (x = 0; x < sdp->sd_journals; x++) {
- struct gfs2_jdesc *jd = gfs2_jdesc_find(sdp, x);
- if (sdp->sd_args.ar_spectator) {
- error = check_journal_clean(sdp, jd, true);
- if (error)
- goto fail_statfs;
- continue;
- }
- error = gfs2_recover_journal(jd, true);
- if (error) {
- fs_err(sdp, "error recovering journal %u: %d\n",
- x, error);
- goto fail_statfs;
- }
- }
- gfs2_others_may_mount(sdp);
- } else if (!sdp->sd_args.ar_spectator) {
- error = gfs2_recover_journal(sdp->sd_jdesc, true);
- if (error) {
- fs_err(sdp, "error recovering my journal: %d\n", error);
- goto fail_statfs;
- }
- }
- sdp->sd_log_idle = 1;
- set_bit(SDF_JOURNAL_CHECKED, &sdp->sd_flags);
- gfs2_glock_dq_uninit(&ji_gh);
- jindex = 0;
- INIT_WORK(&sdp->sd_freeze_work, gfs2_freeze_func);
- return 0;
- fail_statfs:
- uninit_statfs(sdp);
- fail_jinode_gh:
- /* A withdraw may have done dq/uninit so now we need to check it */
- if (!sdp->sd_args.ar_spectator &&
- gfs2_holder_initialized(&sdp->sd_jinode_gh))
- gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
- fail_journal_gh:
- if (!sdp->sd_args.ar_spectator &&
- gfs2_holder_initialized(&sdp->sd_journal_gh))
- 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 struct lock_class_key gfs2_quota_imutex_key;
- static int init_inodes(struct gfs2_sbd *sdp, int undo)
- {
- int error = 0;
- struct inode *master = d_inode(sdp->sd_master_dir);
- if (undo)
- goto fail_qinode;
- error = init_journal(sdp, undo);
- complete_all(&sdp->sd_journal_ready);
- if (error)
- goto fail;
- /* 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_journal;
- }
- 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;
- }
- /*
- * i_rwsem on quota files is special. Since this inode is hidden system
- * file, we are safe to define locking ourselves.
- */
- lockdep_set_class(&sdp->sd_quota_inode->i_rwsem,
- &gfs2_quota_imutex_key);
- error = gfs2_rindex_update(sdp);
- if (error)
- goto fail_qinode;
- return 0;
- fail_qinode:
- iput(sdp->sd_quota_inode);
- fail_rindex:
- gfs2_clear_rgrpd(sdp);
- iput(sdp->sd_rindex);
- 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 = d_inode(sdp->sd_master_dir);
- 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, "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_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_qc_i;
- }
- return 0;
- fail_qc_gh:
- gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
- fail_qc_i:
- iput(sdp->sd_qc_inode);
- fail_ut_i:
- iput(pn);
- return error;
- }
- static const match_table_t nolock_tokens = {
- { Opt_jid, "jid=%d", },
- { Opt_err, NULL },
- };
- static const struct lm_lockops nolock_ops = {
- .lm_proto_name = "lock_nolock",
- .lm_put_lock = gfs2_glock_free,
- .lm_tokens = &nolock_tokens,
- };
- /**
- * gfs2_lm_mount - mount a locking protocol
- * @sdp: the filesystem
- * @args: mount arguments
- * @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;
- char *o, *options;
- int ret;
- if (!strcmp("lock_nolock", proto)) {
- lm = &nolock_ops;
- sdp->sd_args.ar_localflocks = 1;
- #ifdef CONFIG_GFS2_FS_LOCKING_DLM
- } else if (!strcmp("lock_dlm", proto)) {
- lm = &gfs2_dlm_ops;
- #endif
- } else {
- pr_info("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;
- 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;
- if (test_and_clear_bit(SDF_NOJOURNALID, &sdp->sd_flags))
- ls->ls_jid = option;
- break;
- case Opt_id:
- case Opt_nodir:
- /* Obsolete, but left for backward compat purposes */
- 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_err:
- default:
- hostdata_error:
- fs_info(sdp, "unknown hostdata (%s)\n", o);
- return -EINVAL;
- }
- }
- if (lm->lm_mount == NULL) {
- fs_info(sdp, "Now mounting FS...\n");
- complete_all(&sdp->sd_locking_init);
- return 0;
- }
- ret = lm->lm_mount(sdp, table);
- if (ret == 0)
- fs_info(sdp, "Joined cluster. Now mounting FS...\n");
- complete_all(&sdp->sd_locking_init);
- return ret;
- }
- void gfs2_lm_unmount(struct gfs2_sbd *sdp)
- {
- const struct lm_lockops *lm = sdp->sd_lockstruct.ls_ops;
- if (likely(!gfs2_withdrawn(sdp)) && lm->lm_unmount)
- lm->lm_unmount(sdp);
- }
- static int wait_on_journal(struct gfs2_sbd *sdp)
- {
- if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
- return 0;
- return wait_on_bit(&sdp->sd_flags, SDF_NOJOURNALID, TASK_INTERRUPTIBLE)
- ? -EINTR : 0;
- }
- void gfs2_online_uevent(struct gfs2_sbd *sdp)
- {
- struct super_block *sb = sdp->sd_vfs;
- char ro[20];
- char spectator[20];
- char *envp[] = { ro, spectator, NULL };
- sprintf(ro, "RDONLY=%d", sb_rdonly(sb));
- sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0);
- kobject_uevent_env(&sdp->sd_kobj, KOBJ_ONLINE, envp);
- }
- static int init_threads(struct gfs2_sbd *sdp)
- {
- struct task_struct *p;
- int error = 0;
- p = kthread_run(gfs2_logd, sdp, "gfs2_logd");
- if (IS_ERR(p)) {
- error = PTR_ERR(p);
- 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");
- if (IS_ERR(p)) {
- error = PTR_ERR(p);
- fs_err(sdp, "can't start quotad thread: %d\n", error);
- goto fail;
- }
- sdp->sd_quotad_process = p;
- return 0;
- fail:
- kthread_stop(sdp->sd_logd_process);
- sdp->sd_logd_process = NULL;
- return error;
- }
- /**
- * gfs2_fill_super - Read in superblock
- * @sb: The VFS superblock
- * @args: Mount options
- * @silent: Don't complain if it's not a GFS2 filesystem
- *
- * Returns: -errno
- */
- static int gfs2_fill_super(struct super_block *sb, struct fs_context *fc)
- {
- struct gfs2_args *args = fc->fs_private;
- int silent = fc->sb_flags & SB_SILENT;
- struct gfs2_sbd *sdp;
- struct gfs2_holder mount_gh;
- struct gfs2_holder freeze_gh;
- int error;
- sdp = init_sbd(sb);
- if (!sdp) {
- pr_warn("can't alloc struct gfs2_sbd\n");
- return -ENOMEM;
- }
- sdp->sd_args = *args;
- if (sdp->sd_args.ar_spectator) {
- sb->s_flags |= SB_RDONLY;
- set_bit(SDF_RORECOVERY, &sdp->sd_flags);
- }
- if (sdp->sd_args.ar_posix_acl)
- sb->s_flags |= SB_POSIXACL;
- if (sdp->sd_args.ar_nobarrier)
- set_bit(SDF_NOBARRIERS, &sdp->sd_flags);
- sb->s_flags |= SB_NOSEC;
- sb->s_magic = GFS2_MAGIC;
- sb->s_op = &gfs2_super_ops;
- sb->s_d_op = &gfs2_dops;
- sb->s_export_op = &gfs2_export_ops;
- sb->s_xattr = gfs2_xattr_handlers;
- sb->s_qcop = &gfs2_quotactl_ops;
- sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
- sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
- 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 = BIT(sdp->sd_fsb2bb_shift);
- sdp->sd_tune.gt_logd_secs = sdp->sd_args.ar_commit;
- sdp->sd_tune.gt_quota_quantum = sdp->sd_args.ar_quota_quantum;
- if (sdp->sd_args.ar_statfs_quantum) {
- sdp->sd_tune.gt_statfs_slow = 0;
- sdp->sd_tune.gt_statfs_quantum = sdp->sd_args.ar_statfs_quantum;
- } else {
- sdp->sd_tune.gt_statfs_slow = 1;
- sdp->sd_tune.gt_statfs_quantum = 30;
- }
- error = init_names(sdp, silent);
- if (error)
- goto fail_free;
- snprintf(sdp->sd_fsname, sizeof(sdp->sd_fsname), "%s", sdp->sd_table_name);
- error = gfs2_sys_fs_add(sdp);
- if (error)
- goto fail_free;
- gfs2_create_debugfs_file(sdp);
- error = gfs2_lm_mount(sdp, silent);
- if (error)
- goto fail_debug;
- error = init_locking(sdp, &mount_gh, DO);
- if (error)
- goto fail_lm;
- error = init_sb(sdp, silent);
- if (error)
- goto fail_locking;
- error = wait_on_journal(sdp);
- if (error)
- goto fail_sb;
- /*
- * If user space has failed to join the cluster or some similar
- * failure has occurred, then the journal id will contain a
- * negative (error) number. This will then be returned to the
- * caller (of the mount syscall). We do this even for spectator
- * mounts (which just write a jid of 0 to indicate "ok" even though
- * the jid is unused in the spectator case)
- */
- if (sdp->sd_lockstruct.ls_jid < 0) {
- error = sdp->sd_lockstruct.ls_jid;
- sdp->sd_lockstruct.ls_jid = 0;
- goto fail_sb;
- }
- if (sdp->sd_args.ar_spectator)
- snprintf(sdp->sd_fsname, sizeof(sdp->sd_fsname), "%s.s",
- sdp->sd_table_name);
- else
- snprintf(sdp->sd_fsname, sizeof(sdp->sd_fsname), "%s.%u",
- sdp->sd_table_name, sdp->sd_lockstruct.ls_jid);
- 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;
- }
- if (!sb_rdonly(sb)) {
- error = init_threads(sdp);
- if (error) {
- gfs2_withdraw_delayed(sdp);
- goto fail_per_node;
- }
- }
- error = gfs2_freeze_lock(sdp, &freeze_gh, 0);
- if (error)
- goto fail_per_node;
- if (!sb_rdonly(sb))
- error = gfs2_make_fs_rw(sdp);
- gfs2_freeze_unlock(&freeze_gh);
- if (error) {
- if (sdp->sd_quotad_process)
- kthread_stop(sdp->sd_quotad_process);
- sdp->sd_quotad_process = NULL;
- if (sdp->sd_logd_process)
- kthread_stop(sdp->sd_logd_process);
- sdp->sd_logd_process = NULL;
- fs_err(sdp, "can't make FS RW: %d\n", error);
- goto fail_per_node;
- }
- gfs2_glock_dq_uninit(&mount_gh);
- gfs2_online_uevent(sdp);
- return 0;
- 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:
- complete_all(&sdp->sd_journal_ready);
- gfs2_gl_hash_clear(sdp);
- gfs2_lm_unmount(sdp);
- fail_debug:
- gfs2_delete_debugfs_file(sdp);
- gfs2_sys_fs_del(sdp);
- fail_free:
- free_sbd(sdp);
- sb->s_fs_info = NULL;
- return error;
- }
- /**
- * gfs2_get_tree - Get the GFS2 superblock and root directory
- * @fc: The filesystem context
- *
- * Returns: 0 or -errno on error
- */
- static int gfs2_get_tree(struct fs_context *fc)
- {
- struct gfs2_args *args = fc->fs_private;
- struct gfs2_sbd *sdp;
- int error;
- error = get_tree_bdev(fc, gfs2_fill_super);
- if (error)
- return error;
- sdp = fc->root->d_sb->s_fs_info;
- dput(fc->root);
- if (args->ar_meta)
- fc->root = dget(sdp->sd_master_dir);
- else
- fc->root = dget(sdp->sd_root_dir);
- return 0;
- }
- static void gfs2_fc_free(struct fs_context *fc)
- {
- struct gfs2_args *args = fc->fs_private;
- kfree(args);
- }
- enum gfs2_param {
- Opt_lockproto,
- Opt_locktable,
- Opt_hostdata,
- Opt_spectator,
- Opt_ignore_local_fs,
- Opt_localflocks,
- Opt_localcaching,
- Opt_debug,
- Opt_upgrade,
- Opt_acl,
- Opt_quota,
- Opt_quota_flag,
- Opt_suiddir,
- Opt_data,
- Opt_meta,
- Opt_discard,
- Opt_commit,
- Opt_errors,
- Opt_statfs_quantum,
- Opt_statfs_percent,
- Opt_quota_quantum,
- Opt_barrier,
- Opt_rgrplvb,
- Opt_loccookie,
- };
- static const struct constant_table gfs2_param_quota[] = {
- {"off", GFS2_QUOTA_OFF},
- {"account", GFS2_QUOTA_ACCOUNT},
- {"on", GFS2_QUOTA_ON},
- {}
- };
- enum opt_data {
- Opt_data_writeback = GFS2_DATA_WRITEBACK,
- Opt_data_ordered = GFS2_DATA_ORDERED,
- };
- static const struct constant_table gfs2_param_data[] = {
- {"writeback", Opt_data_writeback },
- {"ordered", Opt_data_ordered },
- {}
- };
- enum opt_errors {
- Opt_errors_withdraw = GFS2_ERRORS_WITHDRAW,
- Opt_errors_panic = GFS2_ERRORS_PANIC,
- };
- static const struct constant_table gfs2_param_errors[] = {
- {"withdraw", Opt_errors_withdraw },
- {"panic", Opt_errors_panic },
- {}
- };
- static const struct fs_parameter_spec gfs2_fs_parameters[] = {
- fsparam_string ("lockproto", Opt_lockproto),
- fsparam_string ("locktable", Opt_locktable),
- fsparam_string ("hostdata", Opt_hostdata),
- fsparam_flag ("spectator", Opt_spectator),
- fsparam_flag ("norecovery", Opt_spectator),
- fsparam_flag ("ignore_local_fs", Opt_ignore_local_fs),
- fsparam_flag ("localflocks", Opt_localflocks),
- fsparam_flag ("localcaching", Opt_localcaching),
- fsparam_flag_no("debug", Opt_debug),
- fsparam_flag ("upgrade", Opt_upgrade),
- fsparam_flag_no("acl", Opt_acl),
- fsparam_flag_no("suiddir", Opt_suiddir),
- fsparam_enum ("data", Opt_data, gfs2_param_data),
- fsparam_flag ("meta", Opt_meta),
- fsparam_flag_no("discard", Opt_discard),
- fsparam_s32 ("commit", Opt_commit),
- fsparam_enum ("errors", Opt_errors, gfs2_param_errors),
- fsparam_s32 ("statfs_quantum", Opt_statfs_quantum),
- fsparam_s32 ("statfs_percent", Opt_statfs_percent),
- fsparam_s32 ("quota_quantum", Opt_quota_quantum),
- fsparam_flag_no("barrier", Opt_barrier),
- fsparam_flag_no("rgrplvb", Opt_rgrplvb),
- fsparam_flag_no("loccookie", Opt_loccookie),
- /* quota can be a flag or an enum so it gets special treatment */
- fsparam_flag_no("quota", Opt_quota_flag),
- fsparam_enum("quota", Opt_quota, gfs2_param_quota),
- {}
- };
- /* Parse a single mount parameter */
- static int gfs2_parse_param(struct fs_context *fc, struct fs_parameter *param)
- {
- struct gfs2_args *args = fc->fs_private;
- struct fs_parse_result result;
- int o;
- o = fs_parse(fc, gfs2_fs_parameters, param, &result);
- if (o < 0)
- return o;
- switch (o) {
- case Opt_lockproto:
- strlcpy(args->ar_lockproto, param->string, GFS2_LOCKNAME_LEN);
- break;
- case Opt_locktable:
- strlcpy(args->ar_locktable, param->string, GFS2_LOCKNAME_LEN);
- break;
- case Opt_hostdata:
- strlcpy(args->ar_hostdata, param->string, GFS2_LOCKNAME_LEN);
- break;
- case Opt_spectator:
- args->ar_spectator = 1;
- break;
- case Opt_ignore_local_fs:
- /* Retained for backwards compat only */
- break;
- case Opt_localflocks:
- args->ar_localflocks = 1;
- break;
- case Opt_localcaching:
- /* Retained for backwards compat only */
- break;
- case Opt_debug:
- if (result.boolean && args->ar_errors == GFS2_ERRORS_PANIC)
- return invalfc(fc, "-o debug and -o errors=panic are mutually exclusive");
- args->ar_debug = result.boolean;
- break;
- case Opt_upgrade:
- /* Retained for backwards compat only */
- break;
- case Opt_acl:
- args->ar_posix_acl = result.boolean;
- break;
- case Opt_quota_flag:
- args->ar_quota = result.negated ? GFS2_QUOTA_OFF : GFS2_QUOTA_ON;
- break;
- case Opt_quota:
- args->ar_quota = result.int_32;
- break;
- case Opt_suiddir:
- args->ar_suiddir = result.boolean;
- break;
- case Opt_data:
- /* The uint_32 result maps directly to GFS2_DATA_* */
- args->ar_data = result.uint_32;
- break;
- case Opt_meta:
- args->ar_meta = 1;
- break;
- case Opt_discard:
- args->ar_discard = result.boolean;
- break;
- case Opt_commit:
- if (result.int_32 <= 0)
- return invalfc(fc, "commit mount option requires a positive numeric argument");
- args->ar_commit = result.int_32;
- break;
- case Opt_statfs_quantum:
- if (result.int_32 < 0)
- return invalfc(fc, "statfs_quantum mount option requires a non-negative numeric argument");
- args->ar_statfs_quantum = result.int_32;
- break;
- case Opt_quota_quantum:
- if (result.int_32 <= 0)
- return invalfc(fc, "quota_quantum mount option requires a positive numeric argument");
- args->ar_quota_quantum = result.int_32;
- break;
- case Opt_statfs_percent:
- if (result.int_32 < 0 || result.int_32 > 100)
- return invalfc(fc, "statfs_percent mount option requires a numeric argument between 0 and 100");
- args->ar_statfs_percent = result.int_32;
- break;
- case Opt_errors:
- if (args->ar_debug && result.uint_32 == GFS2_ERRORS_PANIC)
- return invalfc(fc, "-o debug and -o errors=panic are mutually exclusive");
- args->ar_errors = result.uint_32;
- break;
- case Opt_barrier:
- args->ar_nobarrier = result.boolean;
- break;
- case Opt_rgrplvb:
- args->ar_rgrplvb = result.boolean;
- break;
- case Opt_loccookie:
- args->ar_loccookie = result.boolean;
- break;
- default:
- return invalfc(fc, "invalid mount option: %s", param->key);
- }
- return 0;
- }
- static int gfs2_reconfigure(struct fs_context *fc)
- {
- struct super_block *sb = fc->root->d_sb;
- struct gfs2_sbd *sdp = sb->s_fs_info;
- struct gfs2_args *oldargs = &sdp->sd_args;
- struct gfs2_args *newargs = fc->fs_private;
- struct gfs2_tune *gt = &sdp->sd_tune;
- int error = 0;
- sync_filesystem(sb);
- spin_lock(>->gt_spin);
- oldargs->ar_commit = gt->gt_logd_secs;
- oldargs->ar_quota_quantum = gt->gt_quota_quantum;
- if (gt->gt_statfs_slow)
- oldargs->ar_statfs_quantum = 0;
- else
- oldargs->ar_statfs_quantum = gt->gt_statfs_quantum;
- spin_unlock(>->gt_spin);
- if (strcmp(newargs->ar_lockproto, oldargs->ar_lockproto)) {
- errorfc(fc, "reconfiguration of locking protocol not allowed");
- return -EINVAL;
- }
- if (strcmp(newargs->ar_locktable, oldargs->ar_locktable)) {
- errorfc(fc, "reconfiguration of lock table not allowed");
- return -EINVAL;
- }
- if (strcmp(newargs->ar_hostdata, oldargs->ar_hostdata)) {
- errorfc(fc, "reconfiguration of host data not allowed");
- return -EINVAL;
- }
- if (newargs->ar_spectator != oldargs->ar_spectator) {
- errorfc(fc, "reconfiguration of spectator mode not allowed");
- return -EINVAL;
- }
- if (newargs->ar_localflocks != oldargs->ar_localflocks) {
- errorfc(fc, "reconfiguration of localflocks not allowed");
- return -EINVAL;
- }
- if (newargs->ar_meta != oldargs->ar_meta) {
- errorfc(fc, "switching between gfs2 and gfs2meta not allowed");
- return -EINVAL;
- }
- if (oldargs->ar_spectator)
- fc->sb_flags |= SB_RDONLY;
- if ((sb->s_flags ^ fc->sb_flags) & SB_RDONLY) {
- struct gfs2_holder freeze_gh;
- error = gfs2_freeze_lock(sdp, &freeze_gh, 0);
- if (error)
- return -EINVAL;
- if (fc->sb_flags & SB_RDONLY) {
- error = gfs2_make_fs_ro(sdp);
- if (error)
- errorfc(fc, "unable to remount read-only");
- } else {
- error = gfs2_make_fs_rw(sdp);
- if (error)
- errorfc(fc, "unable to remount read-write");
- }
- gfs2_freeze_unlock(&freeze_gh);
- }
- sdp->sd_args = *newargs;
- if (sdp->sd_args.ar_posix_acl)
- sb->s_flags |= SB_POSIXACL;
- else
- sb->s_flags &= ~SB_POSIXACL;
- if (sdp->sd_args.ar_nobarrier)
- set_bit(SDF_NOBARRIERS, &sdp->sd_flags);
- else
- clear_bit(SDF_NOBARRIERS, &sdp->sd_flags);
- spin_lock(>->gt_spin);
- gt->gt_logd_secs = newargs->ar_commit;
- gt->gt_quota_quantum = newargs->ar_quota_quantum;
- if (newargs->ar_statfs_quantum) {
- gt->gt_statfs_slow = 0;
- gt->gt_statfs_quantum = newargs->ar_statfs_quantum;
- }
- else {
- gt->gt_statfs_slow = 1;
- gt->gt_statfs_quantum = 30;
- }
- spin_unlock(>->gt_spin);
- gfs2_online_uevent(sdp);
- return error;
- }
- static const struct fs_context_operations gfs2_context_ops = {
- .free = gfs2_fc_free,
- .parse_param = gfs2_parse_param,
- .get_tree = gfs2_get_tree,
- .reconfigure = gfs2_reconfigure,
- };
- /* Set up the filesystem mount context */
- static int gfs2_init_fs_context(struct fs_context *fc)
- {
- struct gfs2_args *args;
- args = kmalloc(sizeof(*args), GFP_KERNEL);
- if (args == NULL)
- return -ENOMEM;
- if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) {
- struct gfs2_sbd *sdp = fc->root->d_sb->s_fs_info;
- *args = sdp->sd_args;
- } else {
- memset(args, 0, sizeof(*args));
- args->ar_quota = GFS2_QUOTA_DEFAULT;
- args->ar_data = GFS2_DATA_DEFAULT;
- args->ar_commit = 30;
- args->ar_statfs_quantum = 30;
- args->ar_quota_quantum = 60;
- args->ar_errors = GFS2_ERRORS_DEFAULT;
- }
- fc->fs_private = args;
- fc->ops = &gfs2_context_ops;
- return 0;
- }
- static int set_meta_super(struct super_block *s, struct fs_context *fc)
- {
- return -EINVAL;
- }
- static int test_meta_super(struct super_block *s, struct fs_context *fc)
- {
- return (fc->sget_key == s->s_bdev);
- }
- static int gfs2_meta_get_tree(struct fs_context *fc)
- {
- struct super_block *s;
- struct gfs2_sbd *sdp;
- struct path path;
- int error;
- if (!fc->source || !*fc->source)
- return -EINVAL;
- error = kern_path(fc->source, LOOKUP_FOLLOW, &path);
- if (error) {
- pr_warn("path_lookup on %s returned error %d\n",
- fc->source, error);
- return error;
- }
- fc->fs_type = &gfs2_fs_type;
- fc->sget_key = path.dentry->d_sb->s_bdev;
- s = sget_fc(fc, test_meta_super, set_meta_super);
- path_put(&path);
- if (IS_ERR(s)) {
- pr_warn("gfs2 mount does not exist\n");
- return PTR_ERR(s);
- }
- if ((fc->sb_flags ^ s->s_flags) & SB_RDONLY) {
- deactivate_locked_super(s);
- return -EBUSY;
- }
- sdp = s->s_fs_info;
- fc->root = dget(sdp->sd_master_dir);
- return 0;
- }
- static const struct fs_context_operations gfs2_meta_context_ops = {
- .free = gfs2_fc_free,
- .get_tree = gfs2_meta_get_tree,
- };
- static int gfs2_meta_init_fs_context(struct fs_context *fc)
- {
- int ret = gfs2_init_fs_context(fc);
- if (ret)
- return ret;
- fc->ops = &gfs2_meta_context_ops;
- 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_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_SYNC | GFS2_LFC_KILL_SB);
- 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);
- }
- struct file_system_type gfs2_fs_type = {
- .name = "gfs2",
- .fs_flags = FS_REQUIRES_DEV,
- .init_fs_context = gfs2_init_fs_context,
- .parameters = gfs2_fs_parameters,
- .kill_sb = gfs2_kill_sb,
- .owner = THIS_MODULE,
- };
- MODULE_ALIAS_FS("gfs2");
- struct file_system_type gfs2meta_fs_type = {
- .name = "gfs2meta",
- .fs_flags = FS_REQUIRES_DEV,
- .init_fs_context = gfs2_meta_init_fs_context,
- .owner = THIS_MODULE,
- };
- MODULE_ALIAS_FS("gfs2meta");
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