/*
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
- * Copyright (C) 2004-2005 Red Hat, Inc. 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 v.2.
+ * of the GNU General Public License version 2.
*/
+#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 <asm/semaphore.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 "gfs2.h"
+#include "incore.h"
#include "bmap.h"
#include "dir.h"
-#include "format.h"
#include "glock.h"
#include "glops.h"
#include "inode.h"
#include "rgrp.h"
#include "super.h"
#include "trans.h"
-#include "unlinked.h"
-
-/**
- * gfs2_tune_init - Fill a gfs2_tune structure with default values
- * @gt: tune
- *
- */
-
-void gfs2_tune_init(struct gfs2_tune *gt)
-{
- spin_lock_init(>->gt_spin);
-
- gt->gt_ilimit = 100;
- gt->gt_ilimit_tries = 3;
- gt->gt_ilimit_min = 1;
- gt->gt_demote_secs = 300;
- gt->gt_incore_log_blocks = 1024;
- gt->gt_log_flush_secs = 60;
- gt->gt_jindex_refresh_secs = 60;
- gt->gt_scand_secs = 15;
- gt->gt_recoverd_secs = 60;
- gt->gt_logd_secs = 1;
- gt->gt_quotad_secs = 5;
- gt->gt_inoded_secs = 15;
- gt->gt_quota_simul_sync = 64;
- gt->gt_quota_warn_period = 10;
- gt->gt_quota_scale_num = 1;
- gt->gt_quota_scale_den = 1;
- gt->gt_quota_cache_secs = 300;
- gt->gt_quota_quantum = 60;
- gt->gt_atime_quantum = 3600;
- gt->gt_new_files_jdata = 0;
- gt->gt_new_files_directio = 0;
- gt->gt_max_atomic_write = 4 << 20;
- gt->gt_max_readahead = 1 << 18;
- gt->gt_lockdump_size = 131072;
- gt->gt_stall_secs = 600;
- gt->gt_complain_secs = 10;
- gt->gt_reclaim_limit = 5000;
- gt->gt_entries_per_readdir = 32;
- gt->gt_prefetch_secs = 10;
- gt->gt_greedy_default = HZ / 10;
- gt->gt_greedy_quantum = HZ / 40;
- gt->gt_greedy_max = HZ / 4;
- gt->gt_statfs_quantum = 30;
- gt->gt_statfs_slow = 0;
-}
-
-/**
- * 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.
- */
-
-int gfs2_check_sb(struct gfs2_sbd *sdp, struct gfs2_sb *sb, int silent)
-{
- unsigned int x;
-
- if (sb->sb_header.mh_magic != GFS2_MAGIC ||
- sb->sb_header.mh_type != GFS2_METATYPE_SB) {
- if (!silent)
- printk(KERN_WARNING "GFS2: not a GFS2 filesystem\n");
- return -EINVAL;
- }
-
- /* If format numbers match exactly, we're done. */
-
- if (sb->sb_fs_format == GFS2_FORMAT_FS &&
- sb->sb_multihost_format == GFS2_FORMAT_MULTI)
- return 0;
-
- if (sb->sb_fs_format != GFS2_FORMAT_FS) {
- for (x = 0; gfs2_old_fs_formats[x]; x++)
- if (gfs2_old_fs_formats[x] == sb->sb_fs_format)
- break;
-
- if (!gfs2_old_fs_formats[x]) {
- printk(KERN_WARNING
- "GFS2: code version (%u, %u) is incompatible "
- "with ondisk format (%u, %u)\n",
- GFS2_FORMAT_FS, GFS2_FORMAT_MULTI,
- sb->sb_fs_format, sb->sb_multihost_format);
- printk(KERN_WARNING
- "GFS2: I don't know how to upgrade this FS\n");
- return -EINVAL;
- }
- }
-
- if (sb->sb_multihost_format != GFS2_FORMAT_MULTI) {
- for (x = 0; gfs2_old_multihost_formats[x]; x++)
- if (gfs2_old_multihost_formats[x] ==
- sb->sb_multihost_format)
- break;
-
- if (!gfs2_old_multihost_formats[x]) {
- printk(KERN_WARNING
- "GFS2: code version (%u, %u) is incompatible "
- "with ondisk format (%u, %u)\n",
- GFS2_FORMAT_FS, GFS2_FORMAT_MULTI,
- sb->sb_fs_format, sb->sb_multihost_format);
- printk(KERN_WARNING
- "GFS2: I don't know how to upgrade this FS\n");
- return -EINVAL;
- }
- }
-
- if (!sdp->sd_args.ar_upgrade) {
- printk(KERN_WARNING
- "GFS2: code version (%u, %u) is incompatible "
- "with ondisk format (%u, %u)\n",
- GFS2_FORMAT_FS, GFS2_FORMAT_MULTI,
- sb->sb_fs_format, sb->sb_multihost_format);
- printk(KERN_INFO
- "GFS2: Use the \"upgrade\" mount option to upgrade "
- "the FS\n");
- printk(KERN_INFO "GFS2: See the manual for more details\n");
- return -EINVAL;
- }
+#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_error,
+};
- return 0;
-}
+static const match_table_t tokens = {
+ {Opt_lockproto, "lockproto=%s"},
+ {Opt_locktable, "locktable=%s"},
+ {Opt_hostdata, "hostdata=%s"},
+ {Opt_spectator, "spectator"},
+ {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_error, NULL}
+};
/**
- * gfs2_read_sb - Read super block
- * @sdp: The GFS2 superblock
- * @gl: the glock for the superblock (assumed to be held)
- * @silent: Don't print message if mount fails
+ * 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_read_sb(struct gfs2_sbd *sdp, struct gfs2_glock *gl, int silent)
+int gfs2_mount_args(struct gfs2_args *args, char *options)
{
- struct buffer_head *bh;
- uint32_t hash_blocks, ind_blocks, leaf_blocks;
- uint32_t tmp_blocks;
- unsigned int x;
- int error;
-
- error = gfs2_meta_read(gl, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift,
- DIO_FORCE | DIO_START | DIO_WAIT, &bh);
- if (error) {
- if (!silent)
- fs_err(sdp, "can't read superblock\n");
- return error;
- }
-
- gfs2_assert(sdp, sizeof(struct gfs2_sb) <= bh->b_size);
- gfs2_sb_in(&sdp->sd_sb, bh->b_data);
- brelse(bh);
-
- error = gfs2_check_sb(sdp, &sdp->sd_sb, silent);
- if (error)
- return error;
-
- sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift -
- GFS2_BASIC_BLOCK_SHIFT;
- sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift;
- sdp->sd_diptrs = (sdp->sd_sb.sb_bsize -
- sizeof(struct gfs2_dinode)) / sizeof(uint64_t);
- sdp->sd_inptrs = (sdp->sd_sb.sb_bsize -
- sizeof(struct gfs2_meta_header)) / sizeof(uint64_t);
- 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(uint64_t);
- sdp->sd_ut_per_block = (sdp->sd_sb.sb_bsize -
- sizeof(struct gfs2_meta_header)) /
- sizeof(struct gfs2_unlinked_tag);
- sdp->sd_qc_per_block = (sdp->sd_sb.sb_bsize -
- sizeof(struct gfs2_meta_header)) /
- sizeof(struct gfs2_quota_change);
+ char *o;
+ int token;
+ substring_t tmp[MAX_OPT_ARGS];
+ int rv;
- /* Compute maximum reservation required to add a entry to a directory */
+ /* Split the options into tokens with the "," character and
+ process them */
- hash_blocks = DIV_RU(sizeof(uint64_t) * (1 << GFS2_DIR_MAX_DEPTH),
- sdp->sd_jbsize);
-
- ind_blocks = 0;
- for (tmp_blocks = hash_blocks; tmp_blocks > sdp->sd_diptrs;) {
- tmp_blocks = DIV_RU(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++) {
- uint64_t space, d;
- uint32_t 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)
+ while (1) {
+ o = strsep(&options, ",");
+ if (o == NULL)
break;
- sdp->sd_heightsize[x] = space;
- }
- sdp->sd_max_height = x;
- gfs2_assert(sdp, sdp->sd_max_height <= GFS2_MAX_META_HEIGHT);
-
- sdp->sd_jheightsize[0] = sdp->sd_sb.sb_bsize -
- sizeof(struct gfs2_dinode);
- sdp->sd_jheightsize[1] = sdp->sd_jbsize * sdp->sd_diptrs;
- for (x = 2;; x++) {
- uint64_t space, d;
- uint32_t m;
-
- space = sdp->sd_jheightsize[x - 1] * sdp->sd_inptrs;
- d = space;
- m = do_div(d, sdp->sd_inptrs);
-
- if (d != sdp->sd_jheightsize[x - 1] || m)
+ 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;
- sdp->sd_jheightsize[x] = space;
- }
- sdp->sd_max_jheight = x;
- gfs2_assert(sdp, sdp->sd_max_jheight <= GFS2_MAX_META_HEIGHT);
-
- return 0;
-}
-
-int gfs2_do_upgrade(struct gfs2_sbd *sdp, struct gfs2_glock *sb_gl)
-{
- return 0;
-}
-
-/**
- * gfs2_jindex_hold - Grab a lock on the jindex
- * @sdp: The GFS2 superblock
- * @ji_gh: the holder for the jindex glock
- *
- * This is very similar to the gfs2_rindex_hold() function, except that
- * in general we hold the jindex lock for longer periods of time and
- * we grab it far less frequently (in general) then the rgrp lock.
- *
- * Returns: errno
- */
-
-int gfs2_jindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ji_gh)
-{
- struct gfs2_inode *dip = get_v2ip(sdp->sd_jindex);
- struct qstr name;
- char buf[20];
- struct gfs2_jdesc *jd;
- int error;
-
- name.name = buf;
-
- mutex_lock(&sdp->sd_jindex_mutex);
-
- for (;;) {
- error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED,
- GL_LOCAL_EXCL, ji_gh);
- if (error)
+ case Opt_locktable:
+ match_strlcpy(args->ar_locktable, &tmp[0],
+ GFS2_LOCKNAME_LEN);
break;
-
- name.len = sprintf(buf, "journal%u", sdp->sd_journals);
-
- error = gfs2_dir_search(get_v2ip(sdp->sd_jindex),
- &name, NULL, NULL);
- if (error == -ENOENT) {
- error = 0;
+ case Opt_hostdata:
+ match_strlcpy(args->ar_hostdata, &tmp[0],
+ GFS2_LOCKNAME_LEN);
break;
- }
-
- gfs2_glock_dq_uninit(ji_gh);
-
- if (error)
+ case Opt_spectator:
+ args->ar_spectator = 1;
break;
-
- error = -ENOMEM;
- jd = kzalloc(sizeof(struct gfs2_jdesc), GFP_KERNEL);
- if (!jd)
+ case Opt_ignore_local_fs:
+ args->ar_ignore_local_fs = 1;
break;
-
- error = gfs2_lookupi(sdp->sd_jindex, &name, 1, &jd->jd_inode);
- if (error) {
- kfree(jd);
+ case Opt_localflocks:
+ args->ar_localflocks = 1;
+ break;
+ case Opt_localcaching:
+ args->ar_localcaching = 1;
+ break;
+ case Opt_debug:
+ if (args->ar_errors == GFS2_ERRORS_PANIC) {
+ printk(KERN_WARNING "GFS2: -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:
+ args->ar_upgrade = 1;
+ 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) {
+ printk(KERN_WARNING "GFS2: 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) {
+ printk(KERN_WARNING "GFS2: 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) {
+ printk(KERN_WARNING "GFS2: 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) {
+ printk(KERN_WARNING "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) {
+ printk(KERN_WARNING "GFS2: -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_error:
+ default:
+ printk(KERN_WARNING "GFS2: invalid mount option: %s\n", o);
+ return -EINVAL;
}
-
- spin_lock(&sdp->sd_jindex_spin);
- jd->jd_jid = sdp->sd_journals++;
- list_add_tail(&jd->jd_list, &sdp->sd_jindex_list);
- spin_unlock(&sdp->sd_jindex_spin);
}
- mutex_unlock(&sdp->sd_jindex_mutex);
-
- return error;
+ return 0;
}
/**
void gfs2_jindex_free(struct gfs2_sbd *sdp)
{
- struct list_head list;
+ struct list_head list, *head;
struct gfs2_jdesc *jd;
+ struct gfs2_journal_extent *jext;
spin_lock(&sdp->sd_jindex_spin);
list_add(&list, &sdp->sd_jindex_list);
while (!list_empty(&list)) {
jd = list_entry(list.next, struct gfs2_jdesc, jd_list);
+ head = &jd->extent_list;
+ while (!list_empty(head)) {
+ jext = list_entry(head->next,
+ struct gfs2_journal_extent,
+ extent_list);
+ list_del(&jext->extent_list);
+ kfree(jext);
+ }
list_del(&jd->jd_list);
iput(jd->jd_inode);
kfree(jd);
return jd;
}
-void gfs2_jdesc_make_dirty(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);
- if (jd)
- jd->jd_dirty = 1;
- spin_unlock(&sdp->sd_jindex_spin);
-}
-
-struct gfs2_jdesc *gfs2_jdesc_find_dirty(struct gfs2_sbd *sdp)
-{
- struct gfs2_jdesc *jd;
- int found = 0;
-
- spin_lock(&sdp->sd_jindex_spin);
-
- list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
- if (jd->jd_dirty) {
- jd->jd_dirty = 0;
- found = 1;
- break;
- }
- }
- spin_unlock(&sdp->sd_jindex_spin);
-
- if (!found)
- jd = NULL;
-
- return jd;
-}
-
int gfs2_jdesc_check(struct gfs2_jdesc *jd)
{
- struct gfs2_inode *ip = get_v2ip(jd->jd_inode);
- struct gfs2_sbd *sdp = ip->i_sbd;
+ struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
+ struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
int ar;
int error;
- if (ip->i_di.di_size < (8 << 20) ||
- ip->i_di.di_size > (1 << 30) ||
- (ip->i_di.di_size & (sdp->sd_sb.sb_bsize - 1))) {
+ if (ip->i_disksize < (8 << 20) || ip->i_disksize > (1 << 30) ||
+ (ip->i_disksize & (sdp->sd_sb.sb_bsize - 1))) {
gfs2_consist_inode(ip);
return -EIO;
}
- jd->jd_blocks = ip->i_di.di_size >> sdp->sd_sb.sb_bsize_shift;
+ jd->jd_blocks = ip->i_disksize >> sdp->sd_sb.sb_bsize_shift;
- error = gfs2_write_alloc_required(ip,
- 0, ip->i_di.di_size,
- &ar);
+ error = gfs2_write_alloc_required(ip, 0, ip->i_disksize, &ar);
if (!error && ar) {
gfs2_consist_inode(ip);
error = -EIO;
return error;
}
-int gfs2_lookup_master_dir(struct gfs2_sbd *sdp)
-{
- struct inode *inode = NULL;
- struct gfs2_glock *gl;
- int error;
-
- error = gfs2_glock_get(sdp,
- sdp->sd_sb.sb_master_dir.no_addr,
- &gfs2_inode_glops, CREATE, &gl);
- if (!error) {
- error = gfs2_lookup_simple(sdp->sd_root_dir, ".gfs2_admin",
- &inode);
- sdp->sd_master_dir = inode;
- gfs2_glock_put(gl);
- }
-
- return error;
-}
-
/**
* gfs2_make_fs_rw - Turn a Read-Only FS into a Read-Write one
* @sdp: the filesystem
int gfs2_make_fs_rw(struct gfs2_sbd *sdp)
{
- struct gfs2_glock *j_gl = get_v2ip(sdp->sd_jdesc->jd_inode)->i_gl;
+ struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode);
+ struct gfs2_glock *j_gl = ip->i_gl;
struct gfs2_holder t_gh;
- struct gfs2_log_header head;
+ struct gfs2_log_header_host head;
int error;
- error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED,
- GL_LOCAL_EXCL | GL_NEVER_RECURSE, &t_gh);
+ error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, 0, &t_gh);
if (error)
return error;
- gfs2_meta_cache_flush(get_v2ip(sdp->sd_jdesc->jd_inode));
- j_gl->gl_ops->go_inval(j_gl, DIO_METADATA | DIO_DATA);
+ j_gl->gl_ops->go_inval(j_gl, DIO_METADATA);
error = gfs2_find_jhead(sdp->sd_jdesc, &head);
if (error)
sdp->sd_log_sequence = head.lh_sequence + 1;
gfs2_log_pointers_init(sdp, head.lh_blkno);
- error = gfs2_unlinked_init(sdp);
- if (error)
- goto fail;
error = gfs2_quota_init(sdp);
if (error)
- goto fail_unlinked;
+ goto fail;
set_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags);
return 0;
- fail_unlinked:
- gfs2_unlinked_cleanup(sdp);
-
- fail:
+fail:
t_gh.gh_flags |= GL_NOCACHE;
gfs2_glock_dq_uninit(&t_gh);
return error;
}
-/**
- * gfs2_make_fs_ro - Turn a Read-Write FS into a Read-Only one
- * @sdp: the filesystem
- *
- * Returns: errno
- */
-
-int gfs2_make_fs_ro(struct gfs2_sbd *sdp)
+void gfs2_statfs_change_in(struct gfs2_statfs_change_host *sc, const void *buf)
{
- struct gfs2_holder t_gh;
- int error;
-
- gfs2_unlinked_dealloc(sdp);
- gfs2_quota_sync(sdp);
- gfs2_statfs_sync(sdp);
-
- error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED,
- GL_LOCAL_EXCL | GL_NEVER_RECURSE | GL_NOCACHE,
- &t_gh);
- if (error && !test_bit(SDF_SHUTDOWN, &sdp->sd_flags))
- return error;
-
- gfs2_meta_syncfs(sdp);
- gfs2_log_shutdown(sdp);
-
- clear_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags);
+ const struct gfs2_statfs_change *str = buf;
- if (t_gh.gh_gl)
- gfs2_glock_dq_uninit(&t_gh);
+ 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);
+}
- gfs2_unlinked_cleanup(sdp);
- gfs2_quota_cleanup(sdp);
+static void gfs2_statfs_change_out(const struct gfs2_statfs_change_host *sc, void *buf)
+{
+ struct gfs2_statfs_change *str = buf;
- return error;
+ 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 = get_v2ip(sdp->sd_statfs_inode);
- struct gfs2_statfs_change *m_sc = &sdp->sd_statfs_master;
- struct gfs2_inode *l_ip = get_v2ip(sdp->sd_sc_inode);
- struct gfs2_statfs_change *l_sc = &sdp->sd_statfs_local;
+ 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;
brelse(l_bh);
}
- out_m_bh:
+out_m_bh:
brelse(m_bh);
-
- out:
+out:
gfs2_glock_dq_uninit(&gh);
-
return 0;
}
-void gfs2_statfs_change(struct gfs2_sbd *sdp, int64_t total, int64_t free,
- int64_t dinodes)
+void gfs2_statfs_change(struct gfs2_sbd *sdp, s64 total, s64 free,
+ s64 dinodes)
{
- struct gfs2_inode *l_ip = get_v2ip(sdp->sd_sc_inode);
- struct gfs2_statfs_change *l_sc = &sdp->sd_statfs_local;
+ 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;
- mutex_lock(&sdp->sd_statfs_mutex);
gfs2_trans_add_bh(l_ip->i_gl, l_bh, 1);
- mutex_unlock(&sdp->sd_statfs_mutex);
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));
+ 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_bh(l_ip->i_gl, l_bh, 1);
+
+ 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_bh(m_ip->i_gl, m_bh, 1);
+ gfs2_statfs_change_out(m_sc, m_bh->b_data + sizeof(struct gfs2_dinode));
}
-int gfs2_statfs_sync(struct gfs2_sbd *sdp)
+int gfs2_statfs_sync(struct super_block *sb, int type)
{
- struct gfs2_inode *m_ip = get_v2ip(sdp->sd_statfs_inode);
- struct gfs2_inode *l_ip = get_v2ip(sdp->sd_sc_inode);
- struct gfs2_statfs_change *m_sc = &sdp->sd_statfs_master;
- struct gfs2_statfs_change *l_sc = &sdp->sd_statfs_local;
+ 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;
spin_lock(&sdp->sd_statfs_spin);
gfs2_statfs_change_in(m_sc, m_bh->b_data +
- sizeof(struct gfs2_dinode));
+ 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;
if (error)
goto out_bh2;
- mutex_lock(&sdp->sd_statfs_mutex);
- gfs2_trans_add_bh(l_ip->i_gl, l_bh, 1);
- mutex_unlock(&sdp->sd_statfs_mutex);
-
- 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_bh(m_ip->i_gl, m_bh, 1);
- gfs2_statfs_change_out(m_sc, m_bh->b_data + sizeof(struct gfs2_dinode));
+ update_statfs(sdp, m_bh, l_bh);
+ sdp->sd_statfs_force_sync = 0;
gfs2_trans_end(sdp);
- out_bh2:
+out_bh2:
brelse(l_bh);
-
- out_bh:
+out_bh:
brelse(m_bh);
-
- out:
+out:
gfs2_glock_dq_uninit(&gh);
-
return error;
}
+struct lfcc {
+ struct list_head list;
+ struct gfs2_holder gh;
+};
+
/**
- * gfs2_statfs_i - Do a statfs
- * @sdp: the filesystem
- * @sg: the sg structure
+ * 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
*/
-int gfs2_statfs_i(struct gfs2_sbd *sdp, struct gfs2_statfs_change *sc)
+static int gfs2_lock_fs_check_clean(struct gfs2_sbd *sdp,
+ struct gfs2_holder *t_gh)
{
- struct gfs2_statfs_change *m_sc = &sdp->sd_statfs_master;
- struct gfs2_statfs_change *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);
+ struct gfs2_inode *ip;
+ struct gfs2_jdesc *jd;
+ struct lfcc *lfcc;
+ LIST_HEAD(list);
+ struct gfs2_log_header_host lh;
+ int error;
- 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;
+ 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_trans_gl, LM_ST_DEFERRED,
+ GL_NOCACHE, t_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(t_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;
+}
+
+/**
+ * gfs2_freeze_fs - freezes the file system
+ * @sdp: the file system
+ *
+ * This function flushes data and meta data for all machines by
+ * aquiring the transaction log exclusively. All journals are
+ * ensured to be in a clean state as well.
+ *
+ * Returns: errno
+ */
+
+int gfs2_freeze_fs(struct gfs2_sbd *sdp)
+{
+ int error = 0;
+
+ mutex_lock(&sdp->sd_freeze_lock);
+
+ if (!sdp->sd_freeze_count++) {
+ error = gfs2_lock_fs_check_clean(sdp, &sdp->sd_freeze_gh);
+ if (error)
+ sdp->sd_freeze_count--;
+ }
+
+ mutex_unlock(&sdp->sd_freeze_lock);
+
+ return error;
+}
+
+/**
+ * gfs2_unfreeze_fs - unfreezes the file system
+ * @sdp: the file system
+ *
+ * This function allows the file system to proceed by unlocking
+ * the exclusively held transaction lock. Other GFS2 nodes are
+ * now free to acquire the lock shared and go on with their lives.
+ *
+ */
+
+void gfs2_unfreeze_fs(struct gfs2_sbd *sdp)
+{
+ mutex_lock(&sdp->sd_freeze_lock);
+
+ if (sdp->sd_freeze_count && !--sdp->sd_freeze_count)
+ gfs2_glock_dq_uninit(&sdp->sd_freeze_gh);
+
+ mutex_unlock(&sdp->sd_freeze_lock);
+}
+
+
+/**
+ * gfs2_write_inode - Make sure the inode is stable on the disk
+ * @inode: The inode
+ * @sync: synchronous write flag
+ *
+ * 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 gfs2_holder gh;
+ struct buffer_head *bh;
+ struct timespec atime;
+ struct gfs2_dinode *di;
+ int ret = 0;
+
+ /* Check this is a "normal" inode, etc */
+ if (current->flags & PF_MEMALLOC)
+ return 0;
+ ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
+ if (ret)
+ goto do_flush;
+ ret = gfs2_trans_begin(sdp, RES_DINODE, 0);
+ if (ret)
+ goto do_unlock;
+ ret = gfs2_meta_inode_buffer(ip, &bh);
+ if (ret == 0) {
+ di = (struct gfs2_dinode *)bh->b_data;
+ atime.tv_sec = be64_to_cpu(di->di_atime);
+ atime.tv_nsec = be32_to_cpu(di->di_atime_nsec);
+ if (timespec_compare(&inode->i_atime, &atime) > 0) {
+ gfs2_trans_add_bh(ip->i_gl, bh, 1);
+ gfs2_dinode_out(ip, bh->b_data);
+ }
+ brelse(bh);
+ }
+ gfs2_trans_end(sdp);
+do_unlock:
+ gfs2_glock_dq_uninit(&gh);
+do_flush:
+ if (wbc->sync_mode == WB_SYNC_ALL)
+ gfs2_log_flush(GFS2_SB(inode), ip->i_gl);
+ return ret;
+}
+
+/**
+ * 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 t_gh;
+ int error;
+
+ flush_workqueue(gfs2_delete_workqueue);
+ gfs2_quota_sync(sdp->sd_vfs, 0);
+ gfs2_statfs_sync(sdp->sd_vfs, 0);
+
+ error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, GL_NOCACHE,
+ &t_gh);
+ if (error && !test_bit(SDF_SHUTDOWN, &sdp->sd_flags))
+ return error;
+
+ gfs2_meta_syncfs(sdp);
+ gfs2_log_shutdown(sdp);
+
+ clear_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags);
+
+ if (t_gh.gh_gl)
+ gfs2_glock_dq_uninit(&t_gh);
+
+ gfs2_quota_cleanup(sdp);
+
+ return error;
+}
+
+static int gfs2_umount_recovery_wait(void *word)
+{
+ schedule();
+ return 0;
+}
+
+/**
+ * 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;
+ /* Unfreeze the filesystem, if we need to */
+
+ mutex_lock(&sdp->sd_freeze_lock);
+ if (sdp->sd_freeze_count)
+ gfs2_glock_dq_uninit(&sdp->sd_freeze_gh);
+ mutex_unlock(&sdp->sd_freeze_lock);
+
+ /* 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,
+ gfs2_umount_recovery_wait, TASK_UNINTERRUPTIBLE);
+ goto restart;
+ }
+ spin_unlock(&sdp->sd_jindex_spin);
+
+ kthread_stop(sdp->sd_quotad_process);
+ kthread_stop(sdp->sd_logd_process);
+
+ 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_trans_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 */
+ invalidate_inodes(sdp->sd_vfs);
+ 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)
+{
+ if (wait && sb->s_fs_info)
+ gfs2_log_flush(sb->s_fs_info, NULL);
+ return 0;
+}
+
+/**
+ * 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;
+
+ if (test_bit(SDF_SHUTDOWN, &sdp->sd_flags))
+ return -EINVAL;
+
+ for (;;) {
+ error = gfs2_freeze_fs(sdp);
+ 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);
+ }
+ return 0;
+}
+
+/**
+ * gfs2_unfreeze - reallow writes to the filesystem
+ * @sb: the VFS structure for the filesystem
+ *
+ */
+
+static int gfs2_unfreeze(struct super_block *sb)
+{
+ gfs2_unfreeze_fs(sb->s_fs_info);
return 0;
}
*/
static int statfs_slow_fill(struct gfs2_rgrpd *rgd,
- struct gfs2_statfs_change *sc)
+ struct gfs2_statfs_change_host *sc)
{
gfs2_rgrp_verify(rgd);
- sc->sc_total += rgd->rd_ri.ri_data;
- sc->sc_free += rgd->rd_rg.rg_free;
- sc->sc_dinodes += rgd->rd_rg.rg_dinodes;
+ sc->sc_total += rgd->rd_data;
+ sc->sc_free += rgd->rd_free;
+ sc->sc_dinodes += rgd->rd_dinodes;
return 0;
}
* Returns: errno
*/
-int gfs2_statfs_slow(struct gfs2_sbd *sdp, struct gfs2_statfs_change *sc)
+static int gfs2_statfs_slow(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc)
{
struct gfs2_holder ri_gh;
struct gfs2_rgrpd *rgd_next;
int done;
int error = 0, err;
- memset(sc, 0, sizeof(struct gfs2_statfs_change));
+ memset(sc, 0, sizeof(struct gfs2_statfs_change_host));
gha = kcalloc(slots, sizeof(struct gfs2_holder), GFP_KERNEL);
if (!gha)
return -ENOMEM;
error = err;
} else {
if (!error)
- error = statfs_slow_fill(get_gl2rgd(gh->gh_gl), sc);
+ error = statfs_slow_fill(
+ gh->gh_gl->gl_object, sc);
gfs2_glock_dq_uninit(gh);
}
}
gfs2_glock_dq_uninit(&ri_gh);
- out:
+out:
kfree(gha);
-
return error;
}
-struct lfcc {
- struct list_head list;
- struct gfs2_holder gh;
-};
+/**
+ * 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_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
+ * 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 = dentry->d_inode->i_sb;
+ struct gfs2_sbd *sdp = sb->s_fs_info;
+ struct gfs2_statfs_change_host sc;
+ int 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
*/
-int gfs2_lock_fs_check_clean(struct gfs2_sbd *sdp, struct gfs2_holder *t_gh)
+static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data)
{
- struct gfs2_holder ji_gh;
- struct gfs2_jdesc *jd;
- struct lfcc *lfcc;
- LIST_HEAD(list);
- struct gfs2_log_header lh;
+ 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;
- error = gfs2_jindex_hold(sdp, &ji_gh);
+ spin_lock(>->gt_spin);
+ args.ar_commit = gt->gt_log_flush_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;
- list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
- lfcc = kmalloc(sizeof(struct lfcc), GFP_KERNEL);
- if (!lfcc) {
- error = -ENOMEM;
- goto out;
- }
- error = gfs2_glock_nq_init(get_v2ip(jd->jd_inode)->i_gl,
- LM_ST_SHARED, 0,
- &lfcc->gh);
- if (error) {
- kfree(lfcc);
- goto out;
- }
- list_add(&lfcc->list, &list);
- }
+ /* 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;
- error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_DEFERRED,
- LM_FLAG_PRIORITY | GL_NEVER_RECURSE | GL_NOCACHE,
- t_gh);
+ /* Some flags must not be changed */
+ if (args_neq(&args, &sdp->sd_args, spectator) ||
+ args_neq(&args, &sdp->sd_args, ignore_local_fs) ||
+ args_neq(&args, &sdp->sd_args, localflocks) ||
+ args_neq(&args, &sdp->sd_args, localcaching) ||
+ args_neq(&args, &sdp->sd_args, meta))
+ return -EINVAL;
- 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 (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)
- break;
- if (!(lh.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) {
- error = -EBUSY;
- break;
- }
+ return error;
}
- if (error)
- gfs2_glock_dq_uninit(t_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);
+ 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_log_flush_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;
}
- gfs2_glock_dq_uninit(&ji_gh);
+ else {
+ gt->gt_statfs_slow = 1;
+ gt->gt_statfs_quantum = 30;
+ }
+ spin_unlock(>->gt_spin);
- return error;
+ gfs2_online_uevent(sdp);
+ return 0;
}
/**
- * gfs2_freeze_fs - freezes the file system
- * @sdp: the file system
+ * gfs2_drop_inode - Drop an inode (test for remote unlink)
+ * @inode: The inode to drop
*
- * This function flushes data and meta data for all machines by
- * aquiring the transaction log exclusively. All journals are
- * ensured to be in a clean state as well.
- *
- * Returns: errno
+ * 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.
*/
-int gfs2_freeze_fs(struct gfs2_sbd *sdp)
+static void gfs2_drop_inode(struct inode *inode)
{
- int error = 0;
+ struct gfs2_inode *ip = GFS2_I(inode);
- mutex_lock(&sdp->sd_freeze_lock);
-
- if (!sdp->sd_freeze_count++) {
- error = gfs2_lock_fs_check_clean(sdp, &sdp->sd_freeze_gh);
- if (error)
- sdp->sd_freeze_count--;
+ if (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);
}
+ generic_drop_inode(inode);
+}
- mutex_unlock(&sdp->sd_freeze_lock);
+/**
+ * gfs2_clear_inode - Deallocate an inode when VFS is done with it
+ * @inode: The VFS inode
+ *
+ */
- return error;
+static void gfs2_clear_inode(struct inode *inode)
+{
+ struct gfs2_inode *ip = GFS2_I(inode);
+
+ ip->i_gl->gl_object = NULL;
+ 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;
+ gfs2_glock_dq_uninit(&ip->i_iopen_gh);
+ }
+}
+
+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_unfreeze_fs - unfreezes the file system
- * @sdp: the file system
- *
- * This function allows the file system to proceed by unlocking
- * the exclusively held transaction lock. Other GFS2 nodes are
- * now free to acquire the lock shared and go on with their lives.
+ * gfs2_show_options - Show mount options for /proc/mounts
+ * @s: seq_file structure
+ * @mnt: vfsmount
*
+ * Returns: 0 on success or error code
*/
-void gfs2_unfreeze_fs(struct gfs2_sbd *sdp)
+static int gfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
{
- mutex_lock(&sdp->sd_freeze_lock);
+ struct gfs2_sbd *sdp = mnt->mnt_sb->s_fs_info;
+ struct gfs2_args *args = &sdp->sd_args;
+ int val;
+
+ if (is_ancestor(mnt->mnt_root, sdp->sd_master_dir))
+ seq_printf(s, ",meta");
+ if (args->ar_lockproto[0])
+ seq_printf(s, ",lockproto=%s", args->ar_lockproto);
+ if (args->ar_locktable[0])
+ seq_printf(s, ",locktable=%s", args->ar_locktable);
+ if (args->ar_hostdata[0])
+ seq_printf(s, ",hostdata=%s", args->ar_hostdata);
+ if (args->ar_spectator)
+ seq_printf(s, ",spectator");
+ if (args->ar_ignore_local_fs)
+ seq_printf(s, ",ignore_local_fs");
+ if (args->ar_localflocks)
+ seq_printf(s, ",localflocks");
+ if (args->ar_localcaching)
+ seq_printf(s, ",localcaching");
+ if (args->ar_debug)
+ seq_printf(s, ",debug");
+ if (args->ar_upgrade)
+ seq_printf(s, ",upgrade");
+ if (args->ar_posix_acl)
+ seq_printf(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_printf(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_printf(s, ",discard");
+ val = sdp->sd_tune.gt_log_flush_secs;
+ if (val != 60)
+ seq_printf(s, ",commit=%d", val);
+ val = sdp->sd_tune.gt_statfs_quantum;
+ if (val != 30)
+ seq_printf(s, ",statfs_quantum=%d", val);
+ 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_printf(s, ",nobarrier");
- if (sdp->sd_freeze_count && !--sdp->sd_freeze_count)
- gfs2_glock_dq_uninit(&sdp->sd_freeze_gh);
+ return 0;
+}
- mutex_unlock(&sdp->sd_freeze_lock);
+/*
+ * 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_delete_inode(struct inode *inode)
+{
+ struct gfs2_sbd *sdp = inode->i_sb->s_fs_info;
+ struct gfs2_inode *ip = GFS2_I(inode);
+ struct gfs2_holder gh;
+ int error;
+
+ error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
+ if (unlikely(error)) {
+ gfs2_glock_dq_uninit(&ip->i_iopen_gh);
+ goto out;
+ }
+
+ error = gfs2_check_blk_type(sdp, ip->i_no_addr, GFS2_BLKST_UNLINKED);
+ if (error)
+ goto out_truncate;
+
+ 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;
+
+ 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);
+ if (error)
+ goto out_unlock;
+
+out_truncate:
+ 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:
+ if (test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags))
+ 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_delete_inode: %d\n", error);
+out:
+ truncate_inode_pages(&inode->i_data, 0);
+ clear_inode(inode);
+}
+
+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;
+ }
+ return &ip->i_inode;
+}
+
+static void gfs2_destroy_inode(struct inode *inode)
+{
+ kmem_cache_free(gfs2_inode_cachep, inode);
}
+const struct super_operations gfs2_super_ops = {
+ .alloc_inode = gfs2_alloc_inode,
+ .destroy_inode = gfs2_destroy_inode,
+ .write_inode = gfs2_write_inode,
+ .delete_inode = gfs2_delete_inode,
+ .put_super = gfs2_put_super,
+ .sync_fs = gfs2_sync_fs,
+ .freeze_fs = gfs2_freeze,
+ .unfreeze_fs = gfs2_unfreeze,
+ .statfs = gfs2_statfs,
+ .remount_fs = gfs2_remount_fs,
+ .clear_inode = gfs2_clear_inode,
+ .drop_inode = gfs2_drop_inode,
+ .show_options = gfs2_show_options,
+};
+
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff