| /* |
| * 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 <linux/lm_interface.h> |
| |
| #include "gfs2.h" |
| #include "incore.h" |
| #include "bmap.h" |
| #include "daemon.h" |
| #include "glock.h" |
| #include "glops.h" |
| #include "inode.h" |
| #include "mount.h" |
| #include "ops_fstype.h" |
| #include "ops_dentry.h" |
| #include "ops_super.h" |
| #include "recovery.h" |
| #include "rgrp.h" |
| #include "super.h" |
| #include "sys.h" |
| #include "util.h" |
| #include "log.h" |
| |
| #define DO 0 |
| #define UNDO 1 |
| |
| 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); |
| |
| 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_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; |
| } |
| |
| 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_time_gran = 1; |
| 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) |
| { |
| 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; |
| |
| snprintf(sdp->sd_proto_name, GFS2_FSNAME_LEN, "%s", proto); |
| snprintf(sdp->sd_table_name, GFS2_FSNAME_LEN, "%s", table); |
| |
| 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) |
| { |
| struct task_struct *p; |
| int error = 0; |
| |
| if (undo) |
| goto fail_trans; |
| |
| 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]); |
| |
| return error; |
| } |
| |
| static inline struct inode *gfs2_lookup_root(struct super_block *sb, |
| u64 no_addr) |
| { |
| return gfs2_inode_lookup(sb, DT_DIR, no_addr, 0, 0); |
| } |
| |
| static int init_sb(struct gfs2_sbd *sdp, int silent, int undo) |
| { |
| struct super_block *sb = sdp->sd_vfs; |
| struct gfs2_holder sb_gh; |
| u64 no_addr; |
| 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 */ |
| no_addr = sdp->sd_sb.sb_root_dir.no_addr; |
| if (sb->s_type == &gfs2meta_fs_type) |
| no_addr = sdp->sd_sb.sb_master_dir.no_addr; |
| inode = gfs2_lookup_root(sb, no_addr); |
| 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); |
| } else |
| sb->s_root->d_op = &gfs2_dops; |
| |
| out: |
| gfs2_glock_dq_uninit(&sb_gh); |
| return error; |
| } |
| |
| /** |
| * 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_di.di_size >> 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_lm_others_may_mount(struct gfs2_sbd *sdp) |
| { |
| if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) |
| sdp->sd_lockstruct.ls_ops->lm_others_may_mount( |
| sdp->sd_lockstruct.ls_lockspace); |
| } |
| |
| 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); |
| 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_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.no_addr); |
| 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_uptodate = 0; |
| |
| /* 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; |
| } |
| |
| /** |
| * 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) |
| { |
| char *proto = sdp->sd_proto_name; |
| char *table = sdp->sd_table_name; |
| int flags = LM_MFLAG_CONV_NODROP; |
| int error; |
| |
| if (sdp->sd_args.ar_spectator) |
| flags |= LM_MFLAG_SPECTATOR; |
| |
| fs_info(sdp, "Trying to join cluster \"%s\", \"%s\"\n", proto, table); |
| |
| error = gfs2_mount_lockproto(proto, table, sdp->sd_args.ar_hostdata, |
| gfs2_glock_cb, sdp, |
| GFS2_MIN_LVB_SIZE, flags, |
| &sdp->sd_lockstruct, &sdp->sd_kobj); |
| if (error) { |
| fs_info(sdp, "can't mount proto=%s, table=%s, hostdata=%s\n", |
| proto, table, sdp->sd_args.ar_hostdata); |
| goto out; |
| } |
| |
| if (gfs2_assert_warn(sdp, sdp->sd_lockstruct.ls_lockspace) || |
| gfs2_assert_warn(sdp, sdp->sd_lockstruct.ls_ops) || |
| gfs2_assert_warn(sdp, sdp->sd_lockstruct.ls_lvb_size >= |
| GFS2_MIN_LVB_SIZE)) { |
| gfs2_unmount_lockproto(&sdp->sd_lockstruct); |
| goto out; |
| } |
| |
| 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); |
| |
| fs_info(sdp, "Joined cluster. Now mounting FS...\n"); |
| |
| if ((sdp->sd_lockstruct.ls_flags & LM_LSFLAG_LOCAL) && |
| !sdp->sd_args.ar_ignore_local_fs) { |
| sdp->sd_args.ar_localflocks = 1; |
| sdp->sd_args.ar_localcaching = 1; |
| } |
| |
| out: |
| return error; |
| } |
| |
| void gfs2_lm_unmount(struct gfs2_sbd *sdp) |
| { |
| if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) |
| gfs2_unmount_lockproto(&sdp->sd_lockstruct); |
| } |
| |
| /** |
| * 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: |
| 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) |
| { |
| 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 super_block *sb = NULL, *s; |
| 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.path.mnt, nd.path.dentry, &stat); |
| |
| list_for_each_entry(s, &gfs2_fs_type.fs_supers, s_instances) { |
| if ((S_ISBLK(stat.mode) && s->s_dev == stat.rdev) || |
| (S_ISDIR(stat.mode) && |
| s == nd.path.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_put(&nd.path); |
| 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 = 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; |
| } |
| 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) |
| { |
| if (sb->s_fs_info) { |
| gfs2_delete_debugfs_file(sb->s_fs_info); |
| gfs2_meta_syncfs(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, |
| }; |
| |