| /* |
| * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
| * Copyright (C) 2004-2007 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. |
| */ |
| |
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| |
| #include <linux/bio.h> |
| #include <linux/sched.h> |
| #include <linux/slab.h> |
| #include <linux/spinlock.h> |
| #include <linux/completion.h> |
| #include <linux/buffer_head.h> |
| #include <linux/statfs.h> |
| #include <linux/seq_file.h> |
| #include <linux/mount.h> |
| #include <linux/kthread.h> |
| #include <linux/delay.h> |
| #include <linux/gfs2_ondisk.h> |
| #include <linux/crc32.h> |
| #include <linux/time.h> |
| #include <linux/wait.h> |
| #include <linux/writeback.h> |
| #include <linux/backing-dev.h> |
| #include <linux/kernel.h> |
| |
| #include "gfs2.h" |
| #include "incore.h" |
| #include "bmap.h" |
| #include "dir.h" |
| #include "glock.h" |
| #include "glops.h" |
| #include "inode.h" |
| #include "log.h" |
| #include "meta_io.h" |
| #include "quota.h" |
| #include "recovery.h" |
| #include "rgrp.h" |
| #include "super.h" |
| #include "trans.h" |
| #include "util.h" |
| #include "sys.h" |
| #include "xattr.h" |
| |
| #define args_neq(a1, a2, x) ((a1)->ar_##x != (a2)->ar_##x) |
| |
| enum { |
| Opt_lockproto, |
| Opt_locktable, |
| Opt_hostdata, |
| Opt_spectator, |
| Opt_ignore_local_fs, |
| Opt_localflocks, |
| Opt_localcaching, |
| Opt_debug, |
| Opt_nodebug, |
| Opt_upgrade, |
| Opt_acl, |
| Opt_noacl, |
| Opt_quota_off, |
| Opt_quota_account, |
| Opt_quota_on, |
| Opt_quota, |
| Opt_noquota, |
| Opt_suiddir, |
| Opt_nosuiddir, |
| Opt_data_writeback, |
| Opt_data_ordered, |
| Opt_meta, |
| Opt_discard, |
| Opt_nodiscard, |
| Opt_commit, |
| Opt_err_withdraw, |
| Opt_err_panic, |
| Opt_statfs_quantum, |
| Opt_statfs_percent, |
| Opt_quota_quantum, |
| Opt_barrier, |
| Opt_nobarrier, |
| Opt_rgrplvb, |
| Opt_norgrplvb, |
| Opt_error, |
| }; |
| |
| static const match_table_t tokens = { |
| {Opt_lockproto, "lockproto=%s"}, |
| {Opt_locktable, "locktable=%s"}, |
| {Opt_hostdata, "hostdata=%s"}, |
| {Opt_spectator, "spectator"}, |
| {Opt_spectator, "norecovery"}, |
| {Opt_ignore_local_fs, "ignore_local_fs"}, |
| {Opt_localflocks, "localflocks"}, |
| {Opt_localcaching, "localcaching"}, |
| {Opt_debug, "debug"}, |
| {Opt_nodebug, "nodebug"}, |
| {Opt_upgrade, "upgrade"}, |
| {Opt_acl, "acl"}, |
| {Opt_noacl, "noacl"}, |
| {Opt_quota_off, "quota=off"}, |
| {Opt_quota_account, "quota=account"}, |
| {Opt_quota_on, "quota=on"}, |
| {Opt_quota, "quota"}, |
| {Opt_noquota, "noquota"}, |
| {Opt_suiddir, "suiddir"}, |
| {Opt_nosuiddir, "nosuiddir"}, |
| {Opt_data_writeback, "data=writeback"}, |
| {Opt_data_ordered, "data=ordered"}, |
| {Opt_meta, "meta"}, |
| {Opt_discard, "discard"}, |
| {Opt_nodiscard, "nodiscard"}, |
| {Opt_commit, "commit=%d"}, |
| {Opt_err_withdraw, "errors=withdraw"}, |
| {Opt_err_panic, "errors=panic"}, |
| {Opt_statfs_quantum, "statfs_quantum=%d"}, |
| {Opt_statfs_percent, "statfs_percent=%d"}, |
| {Opt_quota_quantum, "quota_quantum=%d"}, |
| {Opt_barrier, "barrier"}, |
| {Opt_nobarrier, "nobarrier"}, |
| {Opt_rgrplvb, "rgrplvb"}, |
| {Opt_norgrplvb, "norgrplvb"}, |
| {Opt_error, NULL} |
| }; |
| |
| /** |
| * gfs2_mount_args - Parse mount options |
| * @args: The structure into which the parsed options will be written |
| * @options: The options to parse |
| * |
| * Return: errno |
| */ |
| |
| int gfs2_mount_args(struct gfs2_args *args, char *options) |
| { |
| char *o; |
| int token; |
| substring_t tmp[MAX_OPT_ARGS]; |
| int rv; |
| |
| /* Split the options into tokens with the "," character and |
| process them */ |
| |
| while (1) { |
| o = strsep(&options, ","); |
| if (o == NULL) |
| break; |
| if (*o == '\0') |
| continue; |
| |
| token = match_token(o, tokens, tmp); |
| switch (token) { |
| case Opt_lockproto: |
| match_strlcpy(args->ar_lockproto, &tmp[0], |
| GFS2_LOCKNAME_LEN); |
| break; |
| case Opt_locktable: |
| match_strlcpy(args->ar_locktable, &tmp[0], |
| GFS2_LOCKNAME_LEN); |
| break; |
| case Opt_hostdata: |
| match_strlcpy(args->ar_hostdata, &tmp[0], |
| 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 (args->ar_errors == GFS2_ERRORS_PANIC) { |
| pr_warn("-o debug and -o errors=panic are mutually exclusive\n"); |
| return -EINVAL; |
| } |
| args->ar_debug = 1; |
| break; |
| case Opt_nodebug: |
| args->ar_debug = 0; |
| break; |
| case Opt_upgrade: |
| /* Retained for backwards compat only */ |
| break; |
| case Opt_acl: |
| args->ar_posix_acl = 1; |
| break; |
| case Opt_noacl: |
| args->ar_posix_acl = 0; |
| break; |
| case Opt_quota_off: |
| case Opt_noquota: |
| args->ar_quota = GFS2_QUOTA_OFF; |
| break; |
| case Opt_quota_account: |
| args->ar_quota = GFS2_QUOTA_ACCOUNT; |
| break; |
| case Opt_quota_on: |
| case Opt_quota: |
| args->ar_quota = GFS2_QUOTA_ON; |
| break; |
| case Opt_suiddir: |
| args->ar_suiddir = 1; |
| break; |
| case Opt_nosuiddir: |
| args->ar_suiddir = 0; |
| break; |
| case Opt_data_writeback: |
| args->ar_data = GFS2_DATA_WRITEBACK; |
| break; |
| case Opt_data_ordered: |
| args->ar_data = GFS2_DATA_ORDERED; |
| break; |
| case Opt_meta: |
| args->ar_meta = 1; |
| break; |
| case Opt_discard: |
| args->ar_discard = 1; |
| break; |
| case Opt_nodiscard: |
| args->ar_discard = 0; |
| break; |
| case Opt_commit: |
| rv = match_int(&tmp[0], &args->ar_commit); |
| if (rv || args->ar_commit <= 0) { |
| pr_warn("commit mount option requires a positive numeric argument\n"); |
| return rv ? rv : -EINVAL; |
| } |
| break; |
| case Opt_statfs_quantum: |
| rv = match_int(&tmp[0], &args->ar_statfs_quantum); |
| if (rv || args->ar_statfs_quantum < 0) { |
| pr_warn("statfs_quantum mount option requires a non-negative numeric argument\n"); |
| return rv ? rv : -EINVAL; |
| } |
| break; |
| case Opt_quota_quantum: |
| rv = match_int(&tmp[0], &args->ar_quota_quantum); |
| if (rv || args->ar_quota_quantum <= 0) { |
| pr_warn("quota_quantum mount option requires a positive numeric argument\n"); |
| return rv ? rv : -EINVAL; |
| } |
| break; |
| case Opt_statfs_percent: |
| rv = match_int(&tmp[0], &args->ar_statfs_percent); |
| if (rv || args->ar_statfs_percent < 0 || |
| args->ar_statfs_percent > 100) { |
| pr_warn("statfs_percent mount option requires a numeric argument between 0 and 100\n"); |
| return rv ? rv : -EINVAL; |
| } |
| break; |
| case Opt_err_withdraw: |
| args->ar_errors = GFS2_ERRORS_WITHDRAW; |
| break; |
| case Opt_err_panic: |
| if (args->ar_debug) { |
| pr_warn("-o debug and -o errors=panic are mutually exclusive\n"); |
| return -EINVAL; |
| } |
| args->ar_errors = GFS2_ERRORS_PANIC; |
| break; |
| case Opt_barrier: |
| args->ar_nobarrier = 0; |
| break; |
| case Opt_nobarrier: |
| args->ar_nobarrier = 1; |
| break; |
| case Opt_rgrplvb: |
| args->ar_rgrplvb = 1; |
| break; |
| case Opt_norgrplvb: |
| args->ar_rgrplvb = 0; |
| break; |
| case Opt_error: |
| default: |
| pr_warn("invalid mount option: %s\n", o); |
| return -EINVAL; |
| } |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * gfs2_jindex_free - Clear all the journal index information |
| * @sdp: The GFS2 superblock |
| * |
| */ |
| |
| void gfs2_jindex_free(struct gfs2_sbd *sdp) |
| { |
| struct list_head list; |
| struct gfs2_jdesc *jd; |
| |
| spin_lock(&sdp->sd_jindex_spin); |
| list_add(&list, &sdp->sd_jindex_list); |
| list_del_init(&sdp->sd_jindex_list); |
| sdp->sd_journals = 0; |
| spin_unlock(&sdp->sd_jindex_spin); |
| |
| while (!list_empty(&list)) { |
| jd = list_entry(list.next, struct gfs2_jdesc, jd_list); |
| gfs2_free_journal_extents(jd); |
| list_del(&jd->jd_list); |
| iput(jd->jd_inode); |
| kfree(jd); |
| } |
| } |
| |
| static struct gfs2_jdesc *jdesc_find_i(struct list_head *head, unsigned int jid) |
| { |
| struct gfs2_jdesc *jd; |
| int found = 0; |
| |
| list_for_each_entry(jd, head, jd_list) { |
| if (jd->jd_jid == jid) { |
| found = 1; |
| break; |
| } |
| } |
| |
| if (!found) |
| jd = NULL; |
| |
| return jd; |
| } |
| |
| struct gfs2_jdesc *gfs2_jdesc_find(struct gfs2_sbd *sdp, unsigned int jid) |
| { |
| struct gfs2_jdesc *jd; |
| |
| spin_lock(&sdp->sd_jindex_spin); |
| jd = jdesc_find_i(&sdp->sd_jindex_list, jid); |
| spin_unlock(&sdp->sd_jindex_spin); |
| |
| return jd; |
| } |
| |
| int gfs2_jdesc_check(struct gfs2_jdesc *jd) |
| { |
| struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
| struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
| u64 size = i_size_read(jd->jd_inode); |
| |
| if (gfs2_check_internal_file_size(jd->jd_inode, 8 << 20, 1 << 30)) |
| return -EIO; |
| |
| jd->jd_blocks = size >> sdp->sd_sb.sb_bsize_shift; |
| |
| if (gfs2_write_alloc_required(ip, 0, size)) { |
| gfs2_consist_inode(ip); |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| 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); |
| return error; |
| } |
| |
| /** |
| * gfs2_make_fs_rw - Turn a Read-Only FS into a Read-Write one |
| * @sdp: the filesystem |
| * |
| * Returns: errno |
| */ |
| |
| int gfs2_make_fs_rw(struct gfs2_sbd *sdp) |
| { |
| struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode); |
| struct gfs2_glock *j_gl = ip->i_gl; |
| struct gfs2_holder freeze_gh; |
| struct gfs2_log_header_host head; |
| int error; |
| |
| error = init_threads(sdp); |
| if (error) |
| return error; |
| |
| error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED, 0, |
| &freeze_gh); |
| if (error) |
| goto fail_threads; |
| |
| j_gl->gl_ops->go_inval(j_gl, DIO_METADATA); |
| |
| error = gfs2_find_jhead(sdp->sd_jdesc, &head); |
| if (error) |
| goto fail; |
| |
| if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { |
| gfs2_consist(sdp); |
| error = -EIO; |
| goto fail; |
| } |
| |
| /* Initialize some head of the log stuff */ |
| sdp->sd_log_sequence = head.lh_sequence + 1; |
| gfs2_log_pointers_init(sdp, head.lh_blkno); |
| |
| error = gfs2_quota_init(sdp); |
| if (error) |
| goto fail; |
| |
| set_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags); |
| |
| gfs2_glock_dq_uninit(&freeze_gh); |
| |
| return 0; |
| |
| fail: |
| freeze_gh.gh_flags |= GL_NOCACHE; |
| gfs2_glock_dq_uninit(&freeze_gh); |
| fail_threads: |
| kthread_stop(sdp->sd_quotad_process); |
| kthread_stop(sdp->sd_logd_process); |
| return error; |
| } |
| |
| void gfs2_statfs_change_in(struct gfs2_statfs_change_host *sc, const void *buf) |
| { |
| const struct gfs2_statfs_change *str = buf; |
| |
| sc->sc_total = be64_to_cpu(str->sc_total); |
| sc->sc_free = be64_to_cpu(str->sc_free); |
| sc->sc_dinodes = be64_to_cpu(str->sc_dinodes); |
| } |
| |
| static void gfs2_statfs_change_out(const struct gfs2_statfs_change_host *sc, void *buf) |
| { |
| struct gfs2_statfs_change *str = buf; |
| |
| str->sc_total = cpu_to_be64(sc->sc_total); |
| str->sc_free = cpu_to_be64(sc->sc_free); |
| str->sc_dinodes = cpu_to_be64(sc->sc_dinodes); |
| } |
| |
| int gfs2_statfs_init(struct gfs2_sbd *sdp) |
| { |
| struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); |
| struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; |
| struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); |
| struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; |
| struct buffer_head *m_bh, *l_bh; |
| struct gfs2_holder gh; |
| int error; |
| |
| error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, |
| &gh); |
| if (error) |
| return error; |
| |
| error = gfs2_meta_inode_buffer(m_ip, &m_bh); |
| if (error) |
| goto out; |
| |
| if (sdp->sd_args.ar_spectator) { |
| spin_lock(&sdp->sd_statfs_spin); |
| gfs2_statfs_change_in(m_sc, m_bh->b_data + |
| sizeof(struct gfs2_dinode)); |
| spin_unlock(&sdp->sd_statfs_spin); |
| } else { |
| error = gfs2_meta_inode_buffer(l_ip, &l_bh); |
| if (error) |
| goto out_m_bh; |
| |
| spin_lock(&sdp->sd_statfs_spin); |
| gfs2_statfs_change_in(m_sc, m_bh->b_data + |
| sizeof(struct gfs2_dinode)); |
| gfs2_statfs_change_in(l_sc, l_bh->b_data + |
| sizeof(struct gfs2_dinode)); |
| spin_unlock(&sdp->sd_statfs_spin); |
| |
| brelse(l_bh); |
| } |
| |
| out_m_bh: |
| brelse(m_bh); |
| out: |
| gfs2_glock_dq_uninit(&gh); |
| return 0; |
| } |
| |
| void gfs2_statfs_change(struct gfs2_sbd *sdp, s64 total, s64 free, |
| s64 dinodes) |
| { |
| struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); |
| struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; |
| struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; |
| struct buffer_head *l_bh; |
| s64 x, y; |
| int need_sync = 0; |
| int error; |
| |
| error = gfs2_meta_inode_buffer(l_ip, &l_bh); |
| if (error) |
| return; |
| |
| gfs2_trans_add_meta(l_ip->i_gl, l_bh); |
| |
| spin_lock(&sdp->sd_statfs_spin); |
| l_sc->sc_total += total; |
| l_sc->sc_free += free; |
| l_sc->sc_dinodes += dinodes; |
| gfs2_statfs_change_out(l_sc, l_bh->b_data + sizeof(struct gfs2_dinode)); |
| if (sdp->sd_args.ar_statfs_percent) { |
| x = 100 * l_sc->sc_free; |
| y = m_sc->sc_free * sdp->sd_args.ar_statfs_percent; |
| if (x >= y || x <= -y) |
| need_sync = 1; |
| } |
| spin_unlock(&sdp->sd_statfs_spin); |
| |
| brelse(l_bh); |
| if (need_sync) |
| gfs2_wake_up_statfs(sdp); |
| } |
| |
| void update_statfs(struct gfs2_sbd *sdp, struct buffer_head *m_bh, |
| struct buffer_head *l_bh) |
| { |
| struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); |
| struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); |
| struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; |
| struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; |
| |
| gfs2_trans_add_meta(l_ip->i_gl, l_bh); |
| |
| spin_lock(&sdp->sd_statfs_spin); |
| m_sc->sc_total += l_sc->sc_total; |
| m_sc->sc_free += l_sc->sc_free; |
| m_sc->sc_dinodes += l_sc->sc_dinodes; |
| memset(l_sc, 0, sizeof(struct gfs2_statfs_change)); |
| memset(l_bh->b_data + sizeof(struct gfs2_dinode), |
| 0, sizeof(struct gfs2_statfs_change)); |
| spin_unlock(&sdp->sd_statfs_spin); |
| |
| gfs2_trans_add_meta(m_ip->i_gl, m_bh); |
| gfs2_statfs_change_out(m_sc, m_bh->b_data + sizeof(struct gfs2_dinode)); |
| } |
| |
| int gfs2_statfs_sync(struct super_block *sb, int type) |
| { |
| struct gfs2_sbd *sdp = sb->s_fs_info; |
| struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); |
| struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); |
| struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; |
| struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; |
| struct gfs2_holder gh; |
| struct buffer_head *m_bh, *l_bh; |
| int error; |
| |
| sb_start_write(sb); |
| error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, |
| &gh); |
| if (error) |
| goto out; |
| |
| error = gfs2_meta_inode_buffer(m_ip, &m_bh); |
| if (error) |
| goto out_unlock; |
| |
| spin_lock(&sdp->sd_statfs_spin); |
| gfs2_statfs_change_in(m_sc, m_bh->b_data + |
| sizeof(struct gfs2_dinode)); |
| if (!l_sc->sc_total && !l_sc->sc_free && !l_sc->sc_dinodes) { |
| spin_unlock(&sdp->sd_statfs_spin); |
| goto out_bh; |
| } |
| spin_unlock(&sdp->sd_statfs_spin); |
| |
| error = gfs2_meta_inode_buffer(l_ip, &l_bh); |
| if (error) |
| goto out_bh; |
| |
| error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0); |
| if (error) |
| goto out_bh2; |
| |
| update_statfs(sdp, m_bh, l_bh); |
| sdp->sd_statfs_force_sync = 0; |
| |
| gfs2_trans_end(sdp); |
| |
| out_bh2: |
| brelse(l_bh); |
| out_bh: |
| brelse(m_bh); |
| out_unlock: |
| gfs2_glock_dq_uninit(&gh); |
| out: |
| sb_end_write(sb); |
| return error; |
| } |
| |
| struct lfcc { |
| struct list_head list; |
| struct gfs2_holder gh; |
| }; |
| |
| /** |
| * gfs2_lock_fs_check_clean - Stop all writes to the FS and check that all |
| * journals are clean |
| * @sdp: the file system |
| * @state: the state to put the transaction lock into |
| * @t_gh: the hold on the transaction lock |
| * |
| * Returns: errno |
| */ |
| |
| static int gfs2_lock_fs_check_clean(struct gfs2_sbd *sdp, |
| struct gfs2_holder *freeze_gh) |
| { |
| struct gfs2_inode *ip; |
| struct gfs2_jdesc *jd; |
| struct lfcc *lfcc; |
| LIST_HEAD(list); |
| struct gfs2_log_header_host lh; |
| int error; |
| |
| list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { |
| lfcc = kmalloc(sizeof(struct lfcc), GFP_KERNEL); |
| if (!lfcc) { |
| error = -ENOMEM; |
| goto out; |
| } |
| ip = GFS2_I(jd->jd_inode); |
| error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &lfcc->gh); |
| if (error) { |
| kfree(lfcc); |
| goto out; |
| } |
| list_add(&lfcc->list, &list); |
| } |
| |
| error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_EXCLUSIVE, |
| GL_NOCACHE, freeze_gh); |
| |
| list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { |
| error = gfs2_jdesc_check(jd); |
| if (error) |
| break; |
| error = gfs2_find_jhead(jd, &lh); |
| if (error) |
| break; |
| if (!(lh.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { |
| error = -EBUSY; |
| break; |
| } |
| } |
| |
| if (error) |
| gfs2_glock_dq_uninit(freeze_gh); |
| |
| out: |
| while (!list_empty(&list)) { |
| lfcc = list_entry(list.next, struct lfcc, list); |
| list_del(&lfcc->list); |
| gfs2_glock_dq_uninit(&lfcc->gh); |
| kfree(lfcc); |
| } |
| return error; |
| } |
| |
| void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf) |
| { |
| struct gfs2_dinode *str = buf; |
| |
| str->di_header.mh_magic = cpu_to_be32(GFS2_MAGIC); |
| str->di_header.mh_type = cpu_to_be32(GFS2_METATYPE_DI); |
| str->di_header.mh_format = cpu_to_be32(GFS2_FORMAT_DI); |
| str->di_num.no_addr = cpu_to_be64(ip->i_no_addr); |
| str->di_num.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino); |
| str->di_mode = cpu_to_be32(ip->i_inode.i_mode); |
| str->di_uid = cpu_to_be32(i_uid_read(&ip->i_inode)); |
| str->di_gid = cpu_to_be32(i_gid_read(&ip->i_inode)); |
| str->di_nlink = cpu_to_be32(ip->i_inode.i_nlink); |
| str->di_size = cpu_to_be64(i_size_read(&ip->i_inode)); |
| str->di_blocks = cpu_to_be64(gfs2_get_inode_blocks(&ip->i_inode)); |
| str->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec); |
| str->di_mtime = cpu_to_be64(ip->i_inode.i_mtime.tv_sec); |
| str->di_ctime = cpu_to_be64(ip->i_inode.i_ctime.tv_sec); |
| |
| str->di_goal_meta = cpu_to_be64(ip->i_goal); |
| str->di_goal_data = cpu_to_be64(ip->i_goal); |
| str->di_generation = cpu_to_be64(ip->i_generation); |
| |
| str->di_flags = cpu_to_be32(ip->i_diskflags); |
| str->di_height = cpu_to_be16(ip->i_height); |
| str->di_payload_format = cpu_to_be32(S_ISDIR(ip->i_inode.i_mode) && |
| !(ip->i_diskflags & GFS2_DIF_EXHASH) ? |
| GFS2_FORMAT_DE : 0); |
| str->di_depth = cpu_to_be16(ip->i_depth); |
| str->di_entries = cpu_to_be32(ip->i_entries); |
| |
| str->di_eattr = cpu_to_be64(ip->i_eattr); |
| str->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec); |
| str->di_mtime_nsec = cpu_to_be32(ip->i_inode.i_mtime.tv_nsec); |
| str->di_ctime_nsec = cpu_to_be32(ip->i_inode.i_ctime.tv_nsec); |
| } |
| |
| /** |
| * gfs2_write_inode - Make sure the inode is stable on the disk |
| * @inode: The inode |
| * @wbc: The writeback control structure |
| * |
| * Returns: errno |
| */ |
| |
| static int gfs2_write_inode(struct inode *inode, struct writeback_control *wbc) |
| { |
| struct gfs2_inode *ip = GFS2_I(inode); |
| struct gfs2_sbd *sdp = GFS2_SB(inode); |
| struct address_space *metamapping = gfs2_glock2aspace(ip->i_gl); |
| struct backing_dev_info *bdi = inode_to_bdi(metamapping->host); |
| int ret = 0; |
| |
| if (wbc->sync_mode == WB_SYNC_ALL) |
| gfs2_log_flush(GFS2_SB(inode), ip->i_gl, NORMAL_FLUSH); |
| if (bdi->dirty_exceeded) |
| gfs2_ail1_flush(sdp, wbc); |
| else |
| filemap_fdatawrite(metamapping); |
| if (wbc->sync_mode == WB_SYNC_ALL) |
| ret = filemap_fdatawait(metamapping); |
| if (ret) |
| mark_inode_dirty_sync(inode); |
| return ret; |
| } |
| |
| /** |
| * gfs2_dirty_inode - check for atime updates |
| * @inode: The inode in question |
| * @flags: The type of dirty |
| * |
| * Unfortunately it can be called under any combination of inode |
| * glock and transaction lock, so we have to check carefully. |
| * |
| * At the moment this deals only with atime - it should be possible |
| * to expand that role in future, once a review of the locking has |
| * been carried out. |
| */ |
| |
| static void gfs2_dirty_inode(struct inode *inode, int flags) |
| { |
| struct gfs2_inode *ip = GFS2_I(inode); |
| struct gfs2_sbd *sdp = GFS2_SB(inode); |
| struct buffer_head *bh; |
| struct gfs2_holder gh; |
| int need_unlock = 0; |
| int need_endtrans = 0; |
| int ret; |
| |
| if (!(flags & (I_DIRTY_DATASYNC|I_DIRTY_SYNC))) |
| return; |
| |
| if (!gfs2_glock_is_locked_by_me(ip->i_gl)) { |
| ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); |
| if (ret) { |
| fs_err(sdp, "dirty_inode: glock %d\n", ret); |
| return; |
| } |
| need_unlock = 1; |
| } else if (WARN_ON_ONCE(ip->i_gl->gl_state != LM_ST_EXCLUSIVE)) |
| return; |
| |
| if (current->journal_info == NULL) { |
| ret = gfs2_trans_begin(sdp, RES_DINODE, 0); |
| if (ret) { |
| fs_err(sdp, "dirty_inode: gfs2_trans_begin %d\n", ret); |
| goto out; |
| } |
| need_endtrans = 1; |
| } |
| |
| ret = gfs2_meta_inode_buffer(ip, &bh); |
| if (ret == 0) { |
| gfs2_trans_add_meta(ip->i_gl, bh); |
| gfs2_dinode_out(ip, bh->b_data); |
| brelse(bh); |
| } |
| |
| if (need_endtrans) |
| gfs2_trans_end(sdp); |
| out: |
| if (need_unlock) |
| gfs2_glock_dq_uninit(&gh); |
| } |
| |
| /** |
| * gfs2_make_fs_ro - Turn a Read-Write FS into a Read-Only one |
| * @sdp: the filesystem |
| * |
| * Returns: errno |
| */ |
| |
| static int gfs2_make_fs_ro(struct gfs2_sbd *sdp) |
| { |
| struct gfs2_holder freeze_gh; |
| int error; |
| |
| error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED, GL_NOCACHE, |
| &freeze_gh); |
| if (error && !test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) |
| return error; |
| |
| kthread_stop(sdp->sd_quotad_process); |
| kthread_stop(sdp->sd_logd_process); |
| |
| flush_workqueue(gfs2_delete_workqueue); |
| gfs2_quota_sync(sdp->sd_vfs, 0); |
| gfs2_statfs_sync(sdp->sd_vfs, 0); |
| |
| down_write(&sdp->sd_log_flush_lock); |
| clear_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags); |
| up_write(&sdp->sd_log_flush_lock); |
| |
| gfs2_log_flush(sdp, NULL, SHUTDOWN_FLUSH); |
| wait_event(sdp->sd_reserving_log_wait, atomic_read(&sdp->sd_reserving_log) == 0); |
| gfs2_assert_warn(sdp, atomic_read(&sdp->sd_log_blks_free) == sdp->sd_jdesc->jd_blocks); |
| |
| if (freeze_gh.gh_gl) |
| gfs2_glock_dq_uninit(&freeze_gh); |
| |
| gfs2_quota_cleanup(sdp); |
| |
| return error; |
| } |
| |
| /** |
| * gfs2_put_super - Unmount the filesystem |
| * @sb: The VFS superblock |
| * |
| */ |
| |
| static void gfs2_put_super(struct super_block *sb) |
| { |
| struct gfs2_sbd *sdp = sb->s_fs_info; |
| int error; |
| struct gfs2_jdesc *jd; |
| |
| /* No more recovery requests */ |
| set_bit(SDF_NORECOVERY, &sdp->sd_flags); |
| smp_mb(); |
| |
| /* Wait on outstanding recovery */ |
| restart: |
| spin_lock(&sdp->sd_jindex_spin); |
| list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { |
| if (!test_bit(JDF_RECOVERY, &jd->jd_flags)) |
| continue; |
| spin_unlock(&sdp->sd_jindex_spin); |
| wait_on_bit(&jd->jd_flags, JDF_RECOVERY, |
| TASK_UNINTERRUPTIBLE); |
| goto restart; |
| } |
| spin_unlock(&sdp->sd_jindex_spin); |
| |
| if (!(sb->s_flags & MS_RDONLY)) { |
| error = gfs2_make_fs_ro(sdp); |
| if (error) |
| gfs2_io_error(sdp); |
| } |
| /* At this point, we're through modifying the disk */ |
| |
| /* Release stuff */ |
| |
| iput(sdp->sd_jindex); |
| iput(sdp->sd_statfs_inode); |
| iput(sdp->sd_rindex); |
| iput(sdp->sd_quota_inode); |
| |
| gfs2_glock_put(sdp->sd_rename_gl); |
| gfs2_glock_put(sdp->sd_freeze_gl); |
| |
| if (!sdp->sd_args.ar_spectator) { |
| gfs2_glock_dq_uninit(&sdp->sd_journal_gh); |
| gfs2_glock_dq_uninit(&sdp->sd_jinode_gh); |
| gfs2_glock_dq_uninit(&sdp->sd_sc_gh); |
| gfs2_glock_dq_uninit(&sdp->sd_qc_gh); |
| iput(sdp->sd_sc_inode); |
| iput(sdp->sd_qc_inode); |
| } |
| |
| gfs2_glock_dq_uninit(&sdp->sd_live_gh); |
| gfs2_clear_rgrpd(sdp); |
| gfs2_jindex_free(sdp); |
| /* Take apart glock structures and buffer lists */ |
| gfs2_gl_hash_clear(sdp); |
| /* Unmount the locking protocol */ |
| gfs2_lm_unmount(sdp); |
| |
| /* At this point, we're through participating in the lockspace */ |
| gfs2_sys_fs_del(sdp); |
| } |
| |
| /** |
| * gfs2_sync_fs - sync the filesystem |
| * @sb: the superblock |
| * |
| * Flushes the log to disk. |
| */ |
| |
| static int gfs2_sync_fs(struct super_block *sb, int wait) |
| { |
| struct gfs2_sbd *sdp = sb->s_fs_info; |
| |
| gfs2_quota_sync(sb, -1); |
| if (wait && sdp) |
| gfs2_log_flush(sdp, NULL, NORMAL_FLUSH); |
| return 0; |
| } |
| |
| void gfs2_freeze_func(struct work_struct *work) |
| { |
| int error; |
| struct gfs2_holder freeze_gh; |
| struct gfs2_sbd *sdp = container_of(work, struct gfs2_sbd, sd_freeze_work); |
| struct super_block *sb = sdp->sd_vfs; |
| |
| atomic_inc(&sb->s_active); |
| error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED, 0, |
| &freeze_gh); |
| if (error) { |
| printk(KERN_INFO "GFS2: couln't get freeze lock : %d\n", error); |
| gfs2_assert_withdraw(sdp, 0); |
| } |
| else { |
| atomic_set(&sdp->sd_freeze_state, SFS_UNFROZEN); |
| error = thaw_super(sb); |
| if (error) { |
| printk(KERN_INFO "GFS2: couldn't thaw filesystem: %d\n", |
| error); |
| gfs2_assert_withdraw(sdp, 0); |
| } |
| if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) |
| freeze_gh.gh_flags |= GL_NOCACHE; |
| gfs2_glock_dq_uninit(&freeze_gh); |
| } |
| deactivate_super(sb); |
| return; |
| } |
| |
| /** |
| * gfs2_freeze - prevent further writes to the filesystem |
| * @sb: the VFS structure for the filesystem |
| * |
| */ |
| |
| static int gfs2_freeze(struct super_block *sb) |
| { |
| struct gfs2_sbd *sdp = sb->s_fs_info; |
| int error = 0; |
| |
| mutex_lock(&sdp->sd_freeze_mutex); |
| if (atomic_read(&sdp->sd_freeze_state) != SFS_UNFROZEN) |
| goto out; |
| |
| if (test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) { |
| error = -EINVAL; |
| goto out; |
| } |
| |
| for (;;) { |
| error = gfs2_lock_fs_check_clean(sdp, &sdp->sd_freeze_gh); |
| if (!error) |
| break; |
| |
| switch (error) { |
| case -EBUSY: |
| fs_err(sdp, "waiting for recovery before freeze\n"); |
| break; |
| |
| default: |
| fs_err(sdp, "error freezing FS: %d\n", error); |
| break; |
| } |
| |
| fs_err(sdp, "retrying...\n"); |
| msleep(1000); |
| } |
| error = 0; |
| out: |
| mutex_unlock(&sdp->sd_freeze_mutex); |
| return error; |
| } |
| |
| /** |
| * gfs2_unfreeze - reallow writes to the filesystem |
| * @sb: the VFS structure for the filesystem |
| * |
| */ |
| |
| static int gfs2_unfreeze(struct super_block *sb) |
| { |
| struct gfs2_sbd *sdp = sb->s_fs_info; |
| |
| mutex_lock(&sdp->sd_freeze_mutex); |
| if (atomic_read(&sdp->sd_freeze_state) != SFS_FROZEN || |
| sdp->sd_freeze_gh.gh_gl == NULL) { |
| mutex_unlock(&sdp->sd_freeze_mutex); |
| return 0; |
| } |
| |
| gfs2_glock_dq_uninit(&sdp->sd_freeze_gh); |
| mutex_unlock(&sdp->sd_freeze_mutex); |
| return 0; |
| } |
| |
| /** |
| * statfs_fill - fill in the sg for a given RG |
| * @rgd: the RG |
| * @sc: the sc structure |
| * |
| * Returns: 0 on success, -ESTALE if the LVB is invalid |
| */ |
| |
| static int statfs_slow_fill(struct gfs2_rgrpd *rgd, |
| struct gfs2_statfs_change_host *sc) |
| { |
| gfs2_rgrp_verify(rgd); |
| sc->sc_total += rgd->rd_data; |
| sc->sc_free += rgd->rd_free; |
| sc->sc_dinodes += rgd->rd_dinodes; |
| return 0; |
| } |
| |
| /** |
| * gfs2_statfs_slow - Stat a filesystem using asynchronous locking |
| * @sdp: the filesystem |
| * @sc: the sc info that will be returned |
| * |
| * Any error (other than a signal) will cause this routine to fall back |
| * to the synchronous version. |
| * |
| * FIXME: This really shouldn't busy wait like this. |
| * |
| * Returns: errno |
| */ |
| |
| static int gfs2_statfs_slow(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) |
| { |
| struct gfs2_rgrpd *rgd_next; |
| struct gfs2_holder *gha, *gh; |
| unsigned int slots = 64; |
| unsigned int x; |
| int done; |
| int error = 0, err; |
| |
| memset(sc, 0, sizeof(struct gfs2_statfs_change_host)); |
| gha = kcalloc(slots, sizeof(struct gfs2_holder), GFP_KERNEL); |
| if (!gha) |
| return -ENOMEM; |
| |
| rgd_next = gfs2_rgrpd_get_first(sdp); |
| |
| for (;;) { |
| done = 1; |
| |
| for (x = 0; x < slots; x++) { |
| gh = gha + x; |
| |
| if (gh->gh_gl && gfs2_glock_poll(gh)) { |
| err = gfs2_glock_wait(gh); |
| if (err) { |
| gfs2_holder_uninit(gh); |
| error = err; |
| } else { |
| if (!error) |
| error = statfs_slow_fill( |
| gh->gh_gl->gl_object, sc); |
| gfs2_glock_dq_uninit(gh); |
| } |
| } |
| |
| if (gh->gh_gl) |
| done = 0; |
| else if (rgd_next && !error) { |
| error = gfs2_glock_nq_init(rgd_next->rd_gl, |
| LM_ST_SHARED, |
| GL_ASYNC, |
| gh); |
| rgd_next = gfs2_rgrpd_get_next(rgd_next); |
| done = 0; |
| } |
| |
| if (signal_pending(current)) |
| error = -ERESTARTSYS; |
| } |
| |
| if (done) |
| break; |
| |
| yield(); |
| } |
| |
| kfree(gha); |
| return error; |
| } |
| |
| /** |
| * gfs2_statfs_i - Do a statfs |
| * @sdp: the filesystem |
| * @sg: the sg structure |
| * |
| * Returns: errno |
| */ |
| |
| static int gfs2_statfs_i(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) |
| { |
| struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; |
| struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; |
| |
| spin_lock(&sdp->sd_statfs_spin); |
| |
| *sc = *m_sc; |
| sc->sc_total += l_sc->sc_total; |
| sc->sc_free += l_sc->sc_free; |
| sc->sc_dinodes += l_sc->sc_dinodes; |
| |
| spin_unlock(&sdp->sd_statfs_spin); |
| |
| if (sc->sc_free < 0) |
| sc->sc_free = 0; |
| if (sc->sc_free > sc->sc_total) |
| sc->sc_free = sc->sc_total; |
| if (sc->sc_dinodes < 0) |
| sc->sc_dinodes = 0; |
| |
| return 0; |
| } |
| |
| /** |
| * gfs2_statfs - Gather and return stats about the filesystem |
| * @sb: The superblock |
| * @statfsbuf: The buffer |
| * |
| * Returns: 0 on success or error code |
| */ |
| |
| static int gfs2_statfs(struct dentry *dentry, struct kstatfs *buf) |
| { |
| struct super_block *sb = d_inode(dentry)->i_sb; |
| struct gfs2_sbd *sdp = sb->s_fs_info; |
| struct gfs2_statfs_change_host sc; |
| int error; |
| |
| error = gfs2_rindex_update(sdp); |
| if (error) |
| return error; |
| |
| if (gfs2_tune_get(sdp, gt_statfs_slow)) |
| error = gfs2_statfs_slow(sdp, &sc); |
| else |
| error = gfs2_statfs_i(sdp, &sc); |
| |
| if (error) |
| return error; |
| |
| buf->f_type = GFS2_MAGIC; |
| buf->f_bsize = sdp->sd_sb.sb_bsize; |
| buf->f_blocks = sc.sc_total; |
| buf->f_bfree = sc.sc_free; |
| buf->f_bavail = sc.sc_free; |
| buf->f_files = sc.sc_dinodes + sc.sc_free; |
| buf->f_ffree = sc.sc_free; |
| buf->f_namelen = GFS2_FNAMESIZE; |
| |
| return 0; |
| } |
| |
| /** |
| * gfs2_remount_fs - called when the FS is remounted |
| * @sb: the filesystem |
| * @flags: the remount flags |
| * @data: extra data passed in (not used right now) |
| * |
| * Returns: errno |
| */ |
| |
| static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data) |
| { |
| struct gfs2_sbd *sdp = sb->s_fs_info; |
| struct gfs2_args args = sdp->sd_args; /* Default to current settings */ |
| struct gfs2_tune *gt = &sdp->sd_tune; |
| int error; |
| |
| sync_filesystem(sb); |
| |
| spin_lock(>->gt_spin); |
| args.ar_commit = gt->gt_logd_secs; |
| args.ar_quota_quantum = gt->gt_quota_quantum; |
| if (gt->gt_statfs_slow) |
| args.ar_statfs_quantum = 0; |
| else |
| args.ar_statfs_quantum = gt->gt_statfs_quantum; |
| spin_unlock(>->gt_spin); |
| error = gfs2_mount_args(&args, data); |
| if (error) |
| return error; |
| |
| /* Not allowed to change locking details */ |
| if (strcmp(args.ar_lockproto, sdp->sd_args.ar_lockproto) || |
| strcmp(args.ar_locktable, sdp->sd_args.ar_locktable) || |
| strcmp(args.ar_hostdata, sdp->sd_args.ar_hostdata)) |
| return -EINVAL; |
| |
| /* Some flags must not be changed */ |
| if (args_neq(&args, &sdp->sd_args, spectator) || |
| args_neq(&args, &sdp->sd_args, localflocks) || |
| args_neq(&args, &sdp->sd_args, meta)) |
| return -EINVAL; |
| |
| if (sdp->sd_args.ar_spectator) |
| *flags |= MS_RDONLY; |
| |
| if ((sb->s_flags ^ *flags) & MS_RDONLY) { |
| if (*flags & MS_RDONLY) |
| error = gfs2_make_fs_ro(sdp); |
| else |
| error = gfs2_make_fs_rw(sdp); |
| if (error) |
| return error; |
| } |
| |
| sdp->sd_args = args; |
| if (sdp->sd_args.ar_posix_acl) |
| sb->s_flags |= MS_POSIXACL; |
| else |
| sb->s_flags &= ~MS_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 = args.ar_commit; |
| gt->gt_quota_quantum = args.ar_quota_quantum; |
| if (args.ar_statfs_quantum) { |
| gt->gt_statfs_slow = 0; |
| gt->gt_statfs_quantum = args.ar_statfs_quantum; |
| } |
| else { |
| gt->gt_statfs_slow = 1; |
| gt->gt_statfs_quantum = 30; |
| } |
| spin_unlock(>->gt_spin); |
| |
| gfs2_online_uevent(sdp); |
| return 0; |
| } |
| |
| /** |
| * gfs2_drop_inode - Drop an inode (test for remote unlink) |
| * @inode: The inode to drop |
| * |
| * If we've received a callback on an iopen lock then its because a |
| * remote node tried to deallocate the inode but failed due to this node |
| * still having the inode open. Here we mark the link count zero |
| * since we know that it must have reached zero if the GLF_DEMOTE flag |
| * is set on the iopen glock. If we didn't do a disk read since the |
| * remote node removed the final link then we might otherwise miss |
| * this event. This check ensures that this node will deallocate the |
| * inode's blocks, or alternatively pass the baton on to another |
| * node for later deallocation. |
| */ |
| |
| static int gfs2_drop_inode(struct inode *inode) |
| { |
| struct gfs2_inode *ip = GFS2_I(inode); |
| |
| if (!test_bit(GIF_FREE_VFS_INODE, &ip->i_flags) && inode->i_nlink) { |
| struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl; |
| if (gl && test_bit(GLF_DEMOTE, &gl->gl_flags)) |
| clear_nlink(inode); |
| } |
| return generic_drop_inode(inode); |
| } |
| |
| static int is_ancestor(const struct dentry *d1, const struct dentry *d2) |
| { |
| do { |
| if (d1 == d2) |
| return 1; |
| d1 = d1->d_parent; |
| } while (!IS_ROOT(d1)); |
| return 0; |
| } |
| |
| /** |
| * gfs2_show_options - Show mount options for /proc/mounts |
| * @s: seq_file structure |
| * @root: root of this (sub)tree |
| * |
| * Returns: 0 on success or error code |
| */ |
| |
| static int gfs2_show_options(struct seq_file *s, struct dentry *root) |
| { |
| struct gfs2_sbd *sdp = root->d_sb->s_fs_info; |
| struct gfs2_args *args = &sdp->sd_args; |
| int val; |
| |
| if (is_ancestor(root, sdp->sd_master_dir)) |
| seq_puts(s, ",meta"); |
| if (args->ar_lockproto[0]) |
| seq_show_option(s, "lockproto", args->ar_lockproto); |
| if (args->ar_locktable[0]) |
| seq_show_option(s, "locktable", args->ar_locktable); |
| if (args->ar_hostdata[0]) |
| seq_show_option(s, "hostdata", args->ar_hostdata); |
| if (args->ar_spectator) |
| seq_puts(s, ",spectator"); |
| if (args->ar_localflocks) |
| seq_puts(s, ",localflocks"); |
| if (args->ar_debug) |
| seq_puts(s, ",debug"); |
| if (args->ar_posix_acl) |
| seq_puts(s, ",acl"); |
| if (args->ar_quota != GFS2_QUOTA_DEFAULT) { |
| char *state; |
| switch (args->ar_quota) { |
| case GFS2_QUOTA_OFF: |
| state = "off"; |
| break; |
| case GFS2_QUOTA_ACCOUNT: |
| state = "account"; |
| break; |
| case GFS2_QUOTA_ON: |
| state = "on"; |
| break; |
| default: |
| state = "unknown"; |
| break; |
| } |
| seq_printf(s, ",quota=%s", state); |
| } |
| if (args->ar_suiddir) |
| seq_puts(s, ",suiddir"); |
| if (args->ar_data != GFS2_DATA_DEFAULT) { |
| char *state; |
| switch (args->ar_data) { |
| case GFS2_DATA_WRITEBACK: |
| state = "writeback"; |
| break; |
| case GFS2_DATA_ORDERED: |
| state = "ordered"; |
| break; |
| default: |
| state = "unknown"; |
| break; |
| } |
| seq_printf(s, ",data=%s", state); |
| } |
| if (args->ar_discard) |
| seq_puts(s, ",discard"); |
| val = sdp->sd_tune.gt_logd_secs; |
| if (val != 30) |
| seq_printf(s, ",commit=%d", val); |
| val = sdp->sd_tune.gt_statfs_quantum; |
| if (val != 30) |
| seq_printf(s, ",statfs_quantum=%d", val); |
| else if (sdp->sd_tune.gt_statfs_slow) |
| seq_puts(s, ",statfs_quantum=0"); |
| val = sdp->sd_tune.gt_quota_quantum; |
| if (val != 60) |
| seq_printf(s, ",quota_quantum=%d", val); |
| if (args->ar_statfs_percent) |
| seq_printf(s, ",statfs_percent=%d", args->ar_statfs_percent); |
| if (args->ar_errors != GFS2_ERRORS_DEFAULT) { |
| const char *state; |
| |
| switch (args->ar_errors) { |
| case GFS2_ERRORS_WITHDRAW: |
| state = "withdraw"; |
| break; |
| case GFS2_ERRORS_PANIC: |
| state = "panic"; |
| break; |
| default: |
| state = "unknown"; |
| break; |
| } |
| seq_printf(s, ",errors=%s", state); |
| } |
| if (test_bit(SDF_NOBARRIERS, &sdp->sd_flags)) |
| seq_puts(s, ",nobarrier"); |
| if (test_bit(SDF_DEMOTE, &sdp->sd_flags)) |
| seq_puts(s, ",demote_interface_used"); |
| if (args->ar_rgrplvb) |
| seq_puts(s, ",rgrplvb"); |
| return 0; |
| } |
| |
| static void gfs2_final_release_pages(struct gfs2_inode *ip) |
| { |
| struct inode *inode = &ip->i_inode; |
| struct gfs2_glock *gl = ip->i_gl; |
| |
| truncate_inode_pages(gfs2_glock2aspace(ip->i_gl), 0); |
| truncate_inode_pages(&inode->i_data, 0); |
| |
| if (atomic_read(&gl->gl_revokes) == 0) { |
| clear_bit(GLF_LFLUSH, &gl->gl_flags); |
| clear_bit(GLF_DIRTY, &gl->gl_flags); |
| } |
| } |
| |
| static int gfs2_dinode_dealloc(struct gfs2_inode *ip) |
| { |
| struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
| struct gfs2_rgrpd *rgd; |
| struct gfs2_holder gh; |
| int error; |
| |
| if (gfs2_get_inode_blocks(&ip->i_inode) != 1) { |
| gfs2_consist_inode(ip); |
| return -EIO; |
| } |
| |
| error = gfs2_rindex_update(sdp); |
| if (error) |
| return error; |
| |
| error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE); |
| if (error) |
| return error; |
| |
| rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1); |
| if (!rgd) { |
| gfs2_consist_inode(ip); |
| error = -EIO; |
| goto out_qs; |
| } |
| |
| error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &gh); |
| if (error) |
| goto out_qs; |
| |
| error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA, |
| sdp->sd_jdesc->jd_blocks); |
| if (error) |
| goto out_rg_gunlock; |
| |
| gfs2_free_di(rgd, ip); |
| |
| gfs2_final_release_pages(ip); |
| |
| gfs2_trans_end(sdp); |
| |
| out_rg_gunlock: |
| gfs2_glock_dq_uninit(&gh); |
| out_qs: |
| gfs2_quota_unhold(ip); |
| return error; |
| } |
| |
| /** |
| * gfs2_evict_inode - Remove an inode from cache |
| * @inode: The inode to evict |
| * |
| * There are three cases to consider: |
| * 1. i_nlink == 0, we are final opener (and must deallocate) |
| * 2. i_nlink == 0, we are not the final opener (and cannot deallocate) |
| * 3. i_nlink > 0 |
| * |
| * If the fs is read only, then we have to treat all cases as per #3 |
| * since we are unable to do any deallocation. The inode will be |
| * deallocated by the next read/write node to attempt an allocation |
| * in the same resource group |
| * |
| * We have to (at the moment) hold the inodes main lock to cover |
| * the gap between unlocking the shared lock on the iopen lock and |
| * taking the exclusive lock. I'd rather do a shared -> exclusive |
| * conversion on the iopen lock, but we can change that later. This |
| * is safe, just less efficient. |
| */ |
| |
| static void gfs2_evict_inode(struct inode *inode) |
| { |
| struct super_block *sb = inode->i_sb; |
| struct gfs2_sbd *sdp = sb->s_fs_info; |
| struct gfs2_inode *ip = GFS2_I(inode); |
| struct gfs2_holder gh; |
| int error; |
| |
| if (test_bit(GIF_FREE_VFS_INODE, &ip->i_flags)) { |
| clear_inode(inode); |
| return; |
| } |
| |
| if (inode->i_nlink || (sb->s_flags & MS_RDONLY)) |
| goto out; |
| |
| /* Must not read inode block until block type has been verified */ |
| error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, &gh); |
| if (unlikely(error)) { |
| ip->i_iopen_gh.gh_flags |= GL_NOCACHE; |
| gfs2_glock_dq_uninit(&ip->i_iopen_gh); |
| goto out; |
| } |
| |
| if (!test_bit(GIF_ALLOC_FAILED, &ip->i_flags)) { |
| error = gfs2_check_blk_type(sdp, ip->i_no_addr, GFS2_BLKST_UNLINKED); |
| if (error) |
| goto out_truncate; |
| } |
| |
| if (test_bit(GIF_INVALID, &ip->i_flags)) { |
| error = gfs2_inode_refresh(ip); |
| if (error) |
| goto out_truncate; |
| } |
| |
| ip->i_iopen_gh.gh_flags |= GL_NOCACHE; |
| gfs2_glock_dq_wait(&ip->i_iopen_gh); |
| gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | GL_NOCACHE, &ip->i_iopen_gh); |
| error = gfs2_glock_nq(&ip->i_iopen_gh); |
| if (error) |
| goto out_truncate; |
| |
| /* Case 1 starts here */ |
| |
| if (S_ISDIR(inode->i_mode) && |
| (ip->i_diskflags & GFS2_DIF_EXHASH)) { |
| error = gfs2_dir_exhash_dealloc(ip); |
| if (error) |
| goto out_unlock; |
| } |
| |
| if (ip->i_eattr) { |
| error = gfs2_ea_dealloc(ip); |
| if (error) |
| goto out_unlock; |
| } |
| |
| if (!gfs2_is_stuffed(ip)) { |
| error = gfs2_file_dealloc(ip); |
| if (error) |
| goto out_unlock; |
| } |
| |
| error = gfs2_dinode_dealloc(ip); |
| goto out_unlock; |
| |
| out_truncate: |
| gfs2_log_flush(sdp, ip->i_gl, NORMAL_FLUSH); |
| if (test_bit(GLF_DIRTY, &ip->i_gl->gl_flags)) { |
| struct address_space *metamapping = gfs2_glock2aspace(ip->i_gl); |
| filemap_fdatawrite(metamapping); |
| filemap_fdatawait(metamapping); |
| } |
| write_inode_now(inode, 1); |
| gfs2_ail_flush(ip->i_gl, 0); |
| |
| /* Case 2 starts here */ |
| error = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks); |
| if (error) |
| goto out_unlock; |
| /* Needs to be done before glock release & also in a transaction */ |
| truncate_inode_pages(&inode->i_data, 0); |
| gfs2_trans_end(sdp); |
| |
| out_unlock: |
| /* Error path for case 1 */ |
| if (gfs2_rs_active(ip->i_res)) |
| gfs2_rs_deltree(ip->i_res); |
| |
| if (test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) { |
| ip->i_iopen_gh.gh_flags |= GL_NOCACHE; |
| gfs2_glock_dq(&ip->i_iopen_gh); |
| } |
| gfs2_holder_uninit(&ip->i_iopen_gh); |
| gfs2_glock_dq_uninit(&gh); |
| if (error && error != GLR_TRYFAILED && error != -EROFS) |
| fs_warn(sdp, "gfs2_evict_inode: %d\n", error); |
| out: |
| /* Case 3 starts here */ |
| truncate_inode_pages_final(&inode->i_data); |
| gfs2_rs_delete(ip, NULL); |
| gfs2_ordered_del_inode(ip); |
| clear_inode(inode); |
| gfs2_dir_hash_inval(ip); |
| ip->i_gl->gl_object = NULL; |
| flush_delayed_work(&ip->i_gl->gl_work); |
| gfs2_glock_add_to_lru(ip->i_gl); |
| gfs2_glock_put(ip->i_gl); |
| ip->i_gl = NULL; |
| if (ip->i_iopen_gh.gh_gl) { |
| ip->i_iopen_gh.gh_gl->gl_object = NULL; |
| ip->i_iopen_gh.gh_flags |= GL_NOCACHE; |
| gfs2_glock_dq_uninit(&ip->i_iopen_gh); |
| } |
| } |
| |
| static struct inode *gfs2_alloc_inode(struct super_block *sb) |
| { |
| struct gfs2_inode *ip; |
| |
| ip = kmem_cache_alloc(gfs2_inode_cachep, GFP_KERNEL); |
| if (ip) { |
| ip->i_flags = 0; |
| ip->i_gl = NULL; |
| ip->i_rgd = NULL; |
| ip->i_res = NULL; |
| } |
| return &ip->i_inode; |
| } |
| |
| static void gfs2_i_callback(struct rcu_head *head) |
| { |
| struct inode *inode = container_of(head, struct inode, i_rcu); |
| kmem_cache_free(gfs2_inode_cachep, inode); |
| } |
| |
| static void gfs2_destroy_inode(struct inode *inode) |
| { |
| call_rcu(&inode->i_rcu, gfs2_i_callback); |
| } |
| |
| const struct super_operations gfs2_super_ops = { |
| .alloc_inode = gfs2_alloc_inode, |
| .destroy_inode = gfs2_destroy_inode, |
| .write_inode = gfs2_write_inode, |
| .dirty_inode = gfs2_dirty_inode, |
| .evict_inode = gfs2_evict_inode, |
| .put_super = gfs2_put_super, |
| .sync_fs = gfs2_sync_fs, |
| .freeze_super = gfs2_freeze, |
| .thaw_super = gfs2_unfreeze, |
| .statfs = gfs2_statfs, |
| .remount_fs = gfs2_remount_fs, |
| .drop_inode = gfs2_drop_inode, |
| .show_options = gfs2_show_options, |
| }; |
| |