There are a variety of mount options, tunable parameters, internal
statistics, and methods of online file system manipulation.
Signed-off-by: Ken Preslan <[email protected]>
Signed-off-by: David Teigland <[email protected]>
---
fs/gfs2/ioctl.c | 1485 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
fs/gfs2/ioctl.h | 15
fs/gfs2/mount.c | 209 +++++++
fs/gfs2/mount.h | 15
fs/gfs2/resize.c | 285 ++++++++++
fs/gfs2/resize.h | 19
fs/gfs2/sys.c | 201 +++++++
fs/gfs2/sys.h | 24
8 files changed, 2253 insertions(+)
--- a/fs/gfs2/ioctl.c 1970-01-01 07:30:00.000000000 +0730
+++ b/fs/gfs2/ioctl.c 2005-09-01 17:36:55.321114560 +0800
@@ -0,0 +1,1485 @@
+/*
+ * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
+ * Copyright (C) 2004-2005 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.
+ */
+
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/smp_lock.h>
+#include <linux/spinlock.h>
+#include <linux/completion.h>
+#include <linux/buffer_head.h>
+#include <linux/gfs2_ioctl.h>
+#include <asm/semaphore.h>
+#include <asm/uaccess.h>
+
+#include "gfs2.h"
+#include "bmap.h"
+#include "dir.h"
+#include "eattr.h"
+#include "glock.h"
+#include "glops.h"
+#include "inode.h"
+#include "ioctl.h"
+#include "jdata.h"
+#include "log.h"
+#include "meta_io.h"
+#include "quota.h"
+#include "resize.h"
+#include "rgrp.h"
+#include "super.h"
+#include "trans.h"
+
+typedef int (*gi_filler_t) (struct gfs2_inode *ip,
+ struct gfs2_ioctl *gi,
+ char *buf,
+ unsigned int size,
+ unsigned int *count);
+
+#define ARG_SIZE 32
+
+/**
+ * gi_skeleton - Setup a buffer that functions can print into
+ * @ip:
+ * @gi:
+ * @filler:
+ *
+ * Returns: -errno or count of bytes copied to userspace
+ */
+
+static int gi_skeleton(struct gfs2_inode *ip, struct gfs2_ioctl *gi,
+ gi_filler_t filler)
+{
+ unsigned int size = gfs2_tune_get(ip->i_sbd, gt_lockdump_size);
+ char *buf;
+ unsigned int count = 0;
+ int error;
+
+ if (size > gi->gi_size)
+ size = gi->gi_size;
+
+ buf = kmalloc(size, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ error = filler(ip, gi, buf, size, &count);
+ if (error)
+ goto out;
+
+ if (copy_to_user(gi->gi_data, buf, count + 1))
+ error = -EFAULT;
+ else
+ error = count + 1;
+
+ out:
+ kfree(buf);
+
+ return error;
+}
+
+/**
+ * gi_get_cookie - Return the "cookie" (identifying string) for a
+ * filesystem mount
+ * @ip:
+ * @gi:
+ * @buf:
+ * @size:
+ * @count:
+ *
+ * Returns: errno
+ */
+
+static int gi_get_cookie(struct gfs2_inode *ip, struct gfs2_ioctl *gi,
+ char *buf, unsigned int size, unsigned int *count)
+{
+ int error = -ENOBUFS;
+
+ if (gi->gi_argc != 1)
+ return -EINVAL;
+
+ gfs2_printf("version 0\n");
+ gfs2_printf("%lu", (unsigned long)ip->i_sbd);
+
+ error = 0;
+
+ out:
+ return error;
+}
+
+/**
+ * gi_get_super - Return the "struct gfs2_sb" for a filesystem
+ * @sdp:
+ * @gi:
+ *
+ * Returns: errno
+ */
+
+static int gi_get_super(struct gfs2_sbd *sdp, struct gfs2_ioctl *gi)
+{
+ struct gfs2_holder sb_gh;
+ struct buffer_head *bh;
+ struct gfs2_sb *sb;
+ int error;
+
+ if (gi->gi_argc != 1)
+ return -EINVAL;
+ if (gi->gi_size != sizeof(struct gfs2_sb))
+ return -EINVAL;
+
+ sb = kmalloc(sizeof(struct gfs2_sb), GFP_KERNEL);
+ if (!sb)
+ return -ENOMEM;
+
+ error = gfs2_glock_nq_num(sdp,
+ GFS2_SB_LOCK, &gfs2_meta_glops,
+ LM_ST_SHARED, 0, &sb_gh);
+ if (error)
+ goto out;
+
+ error = gfs2_meta_read(sb_gh.gh_gl,
+ GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift,
+ DIO_START | DIO_WAIT,
+ &bh);
+ if (error) {
+ gfs2_glock_dq_uninit(&sb_gh);
+ goto out;
+ }
+ gfs2_sb_in(sb, bh->b_data);
+ brelse(bh);
+
+ gfs2_glock_dq_uninit(&sb_gh);
+
+ if (copy_to_user(gi->gi_data, sb,
+ sizeof(struct gfs2_sb)))
+ error = -EFAULT;
+ else
+ error = sizeof(struct gfs2_sb);
+
+ out:
+ kfree(sb);
+
+ return error;
+}
+
+/**
+ * gi_get_args - Return the mount arguments
+ * @ip:
+ * @gi:
+ * @buf:
+ * @size:
+ * @count:
+ *
+ * Returns: errno
+ */
+
+static int gi_get_args(struct gfs2_inode *ip, struct gfs2_ioctl *gi,
+ char *buf, unsigned int size, unsigned int *count)
+{
+ struct gfs2_sbd *sdp = ip->i_sbd;
+ struct gfs2_args *args = &sdp->sd_args;
+ int error = -ENOBUFS;
+
+ if (gi->gi_argc != 1)
+ return -EINVAL;
+
+ gfs2_printf("version 0\n");
+ gfs2_printf("lockproto %s\n", args->ar_lockproto);
+ gfs2_printf("locktable %s\n", args->ar_locktable);
+ gfs2_printf("hostdata %s\n", args->ar_hostdata);
+ gfs2_printf("spectator %d\n", args->ar_spectator);
+ gfs2_printf("ignore_local_fs %d\n", args->ar_ignore_local_fs);
+ gfs2_printf("localcaching %d\n", args->ar_localcaching);
+ gfs2_printf("localflocks %d\n", args->ar_localflocks);
+ gfs2_printf("oopses_ok %d\n", args->ar_oopses_ok);
+ gfs2_printf("debug %d\n", args->ar_debug);
+ gfs2_printf("upgrade %d\n", args->ar_upgrade);
+ gfs2_printf("num_glockd %u\n", args->ar_num_glockd);
+ gfs2_printf("posix_acl %d\n", args->ar_posix_acl);
+ gfs2_printf("quota %u\n", args->ar_quota);
+ gfs2_printf("suiddir %d\n", args->ar_suiddir);
+ gfs2_printf("data %d\n", args->ar_data);
+ gfs2_printf("noatime %d\n", !!test_bit(SDF_NOATIME, &sdp->sd_flags));
+
+ error = 0;
+
+ out:
+ return error;
+}
+
+/**
+ * gi_get_lockstruct - Return the information in the FS' lockstruct
+ * @ip:
+ * @gi:
+ * @buf:
+ * @size:
+ * @count:
+ *
+ * Returns: errno
+ */
+
+static int gi_get_lockstruct(struct gfs2_inode *ip, struct gfs2_ioctl *gi,
+ char *buf, unsigned int size, unsigned int *count)
+{
+ struct lm_lockstruct *ls = &ip->i_sbd->sd_lockstruct;
+ int error = -ENOBUFS;
+
+ if (gi->gi_argc != 1)
+ return -EINVAL;
+
+ gfs2_printf("version 0\n");
+ gfs2_printf("jid %u\n", ls->ls_jid);
+ gfs2_printf("first %u\n", ls->ls_first);
+ gfs2_printf("lvb_size %u\n", ls->ls_lvb_size);
+ gfs2_printf("flags %d\n", ls->ls_flags);
+
+ error = 0;
+
+ out:
+ return error;
+}
+
+/**
+ * gi_get_statfs - Return a filesystem's space usage information
+ * @ip:
+ * @gi:
+ * @buf:
+ * @size:
+ * @count:
+ *
+ * Returns: errno
+ */
+
+static int gi_get_statfs(struct gfs2_inode *ip, struct gfs2_ioctl *gi,
+ char *buf, unsigned int size, unsigned int *count)
+{
+ struct gfs2_sbd *sdp = ip->i_sbd;
+ struct gfs2_statfs_change sc;
+ int error;
+
+ if (gi->gi_argc != 1)
+ return -EINVAL;
+
+ 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;
+
+ error = -ENOBUFS;
+
+ gfs2_printf("version 0\n");
+ gfs2_printf("bsize %u\n", sdp->sd_sb.sb_bsize);
+ gfs2_printf("total %"PRIu64"\n", sc.sc_total);
+ gfs2_printf("free %"PRIu64"\n", sc.sc_free);
+ gfs2_printf("dinodes %"PRIu64"\n", sc.sc_dinodes);
+
+ error = 0;
+
+ out:
+ return error;
+}
+
+/**
+ * handle_roll - Read a atomic_t as an unsigned int
+ * @a: a counter
+ *
+ * if @a is negative, reset it to zero
+ *
+ * Returns: the value of the counter
+ */
+
+static unsigned int handle_roll(atomic_t *a)
+{
+ int x = atomic_read(a);
+ if (x < 0) {
+ atomic_set(a, 0);
+ return 0;
+ }
+ return (unsigned int)x;
+}
+
+/**
+ * gi_get_counters - Return usage counters
+ * @ip:
+ * @gi:
+ * @buf:
+ * @size:
+ * @count:
+ *
+ * Returns: errno
+ */
+
+static int gi_get_counters(struct gfs2_inode *ip, struct gfs2_ioctl *gi,
+ char *buf, unsigned int size, unsigned int *count)
+{
+ struct gfs2_sbd *sdp = ip->i_sbd;
+ int error = -ENOBUFS;
+
+ if (gi->gi_argc != 1)
+ return -EINVAL;
+
+ gfs2_printf("version 0\n");
+ gfs2_printf("sd_glock_count:locks::%d\n",
+ atomic_read(&sdp->sd_glock_count));
+ gfs2_printf("sd_glock_held_count:locks held::%d\n",
+ atomic_read(&sdp->sd_glock_held_count));
+ gfs2_printf("sd_inode_count:incore inodes::%d\n",
+ atomic_read(&sdp->sd_inode_count));
+ gfs2_printf("sd_bufdata_count:metadata buffers::%d\n",
+ atomic_read(&sdp->sd_bufdata_count));
+ gfs2_printf("sd_unlinked_count:unlinked inodes::%d\n",
+ atomic_read(&sdp->sd_unlinked_count));
+ gfs2_printf("sd_quota_count:quota IDs::%d\n",
+ atomic_read(&sdp->sd_quota_count));
+ gfs2_printf("sd_log_num_gl:Glocks in current transaction::%u\n",
+ sdp->sd_log_num_gl);
+ gfs2_printf("sd_log_num_buf:Blocks in current transaction::%u\n",
+ sdp->sd_log_num_buf);
+ gfs2_printf("sd_log_num_revoke:Revokes in current transaction::%u\n",
+ sdp->sd_log_num_revoke);
+ gfs2_printf("sd_log_num_rg:RGs in current transaction::%u\n",
+ sdp->sd_log_num_rg);
+ gfs2_printf("sd_log_num_databuf:Databufs in current transaction::%u\n",
+ sdp->sd_log_num_databuf);
+ gfs2_printf("sd_log_blks_free:log blks free::%u\n",
+ sdp->sd_log_blks_free);
+ gfs2_printf("jd_blocks:log blocks total::%u\n",
+ sdp->sd_jdesc->jd_blocks);
+ gfs2_printf("sd_reclaim_count:glocks on reclaim list::%d\n",
+ atomic_read(&sdp->sd_reclaim_count));
+ gfs2_printf("sd_log_wraps:log wraps::%"PRIu64"\n",
+ sdp->sd_log_wraps);
+ gfs2_printf("sd_bio_outstanding:outstanding BIO calls::%u\n",
+ atomic_read(&sdp->sd_bio_outstanding));
+ gfs2_printf("sd_fh2dentry_misses:fh2dentry misses:diff:%u\n",
+ handle_roll(&sdp->sd_fh2dentry_misses));
+ gfs2_printf("sd_reclaimed:glocks reclaimed:diff:%u\n",
+ handle_roll(&sdp->sd_reclaimed));
+ gfs2_printf("sd_log_flush_incore:log incore flushes:diff:%u\n",
+ handle_roll(&sdp->sd_log_flush_incore));
+ gfs2_printf("sd_log_flush_ondisk:log ondisk flushes:diff:%u\n",
+ handle_roll(&sdp->sd_log_flush_ondisk));
+ gfs2_printf("sd_glock_nq_calls:glock nq calls:diff:%u\n",
+ handle_roll(&sdp->sd_glock_nq_calls));
+ gfs2_printf("sd_glock_dq_calls:glock dq calls:diff:%u\n",
+ handle_roll(&sdp->sd_glock_dq_calls));
+ gfs2_printf("sd_glock_prefetch_calls:glock prefetch calls:diff:%u\n",
+ handle_roll(&sdp->sd_glock_prefetch_calls));
+ gfs2_printf("sd_lm_lock_calls:lm_lock calls:diff:%u\n",
+ handle_roll(&sdp->sd_lm_lock_calls));
+ gfs2_printf("sd_lm_unlock_calls:lm_unlock calls:diff:%u\n",
+ handle_roll(&sdp->sd_lm_unlock_calls));
+ gfs2_printf("sd_lm_callbacks:lm callbacks:diff:%u\n",
+ handle_roll(&sdp->sd_lm_callbacks));
+ gfs2_printf("sd_ops_address:address operations:diff:%u\n",
+ handle_roll(&sdp->sd_ops_address));
+ gfs2_printf("sd_ops_dentry:dentry operations:diff:%u\n",
+ handle_roll(&sdp->sd_ops_dentry));
+ gfs2_printf("sd_ops_export:export operations:diff:%u\n",
+ handle_roll(&sdp->sd_ops_export));
+ gfs2_printf("sd_ops_file:file operations:diff:%u\n",
+ handle_roll(&sdp->sd_ops_file));
+ gfs2_printf("sd_ops_inode:inode operations:diff:%u\n",
+ handle_roll(&sdp->sd_ops_inode));
+ gfs2_printf("sd_ops_super:super operations:diff:%u\n",
+ handle_roll(&sdp->sd_ops_super));
+ gfs2_printf("sd_ops_vm:vm operations:diff:%u\n",
+ handle_roll(&sdp->sd_ops_vm));
+ gfs2_printf("sd_bio_reads:block I/O reads:diff:%u\n",
+ handle_roll(&sdp->sd_bio_reads) >>
+ (sdp->sd_sb.sb_bsize_shift - 9));
+ gfs2_printf("sd_bio_writes:block I/O writes:diff:%u\n",
+ handle_roll(&sdp->sd_bio_writes) >>
+ (sdp->sd_sb.sb_bsize_shift - 9));
+
+ error = 0;
+
+ out:
+ return error;
+}
+
+/**
+ * gi_get_tune - Return current values of the tuneable parameters
+ * @ip:
+ * @gi:
+ * @buf:
+ * @size:
+ * @count:
+ *
+ * Returns: errno
+ */
+
+static int gi_get_tune(struct gfs2_inode *ip, struct gfs2_ioctl *gi,
+ char *buf, unsigned int size, unsigned int *count)
+{
+ struct gfs2_tune *gt = &ip->i_sbd->sd_tune;
+ int error = -ENOBUFS;
+
+ if (gi->gi_argc != 1)
+ return -EINVAL;
+
+ spin_lock(>->gt_spin);
+
+ gfs2_printf("version 0\n");
+ gfs2_printf("ilimit %u\n", gt->gt_ilimit);
+ gfs2_printf("ilimit_tries %u\n", gt->gt_ilimit_tries);
+ gfs2_printf("ilimit_min %u\n", gt->gt_ilimit_min);
+ gfs2_printf("demote_secs %u\n", gt->gt_demote_secs);
+ gfs2_printf("incore_log_blocks %u\n", gt->gt_incore_log_blocks);
+ gfs2_printf("log_flush_secs %u\n", gt->gt_log_flush_secs);
+ gfs2_printf("jindex_refresh_secs %u\n", gt->gt_jindex_refresh_secs);
+ gfs2_printf("scand_secs %u\n", gt->gt_scand_secs);
+ gfs2_printf("recoverd_secs %u\n", gt->gt_recoverd_secs);
+ gfs2_printf("logd_secs %u\n", gt->gt_logd_secs);
+ gfs2_printf("quotad_secs %u\n", gt->gt_quotad_secs);
+ gfs2_printf("inoded_secs %u\n", gt->gt_inoded_secs);
+ gfs2_printf("quota_simul_sync %u\n", gt->gt_quota_simul_sync);
+ gfs2_printf("quota_warn_period %u\n", gt->gt_quota_warn_period);
+ gfs2_printf("quota_scale_num %u\n", gt->gt_quota_scale_num);
+ gfs2_printf("quota_scale_den %u\n", gt->gt_quota_scale_den);
+ gfs2_printf("quota_cache_secs %u\n", gt->gt_quota_cache_secs);
+ gfs2_printf("quota_quantum %u\n", gt->gt_quota_quantum);
+ gfs2_printf("atime_quantum %u\n", gt->gt_atime_quantum);
+ gfs2_printf("new_files_jdata %u\n", gt->gt_new_files_jdata);
+ gfs2_printf("new_files_directio %u\n", gt->gt_new_files_directio);
+ gfs2_printf("max_atomic_write %u\n", gt->gt_max_atomic_write);
+ gfs2_printf("max_readahead %u\n", gt->gt_max_readahead);
+ gfs2_printf("lockdump_size %u\n", gt->gt_lockdump_size);
+ gfs2_printf("stall_secs %u\n", gt->gt_stall_secs);
+ gfs2_printf("complain_secs %u\n", gt->gt_complain_secs);
+ gfs2_printf("reclaim_limit %u\n", gt->gt_reclaim_limit);
+ gfs2_printf("entries_per_readdir %u\n", gt->gt_entries_per_readdir);
+ gfs2_printf("prefetch_secs %u\n", gt->gt_prefetch_secs);
+ gfs2_printf("greedy_default %u\n", gt->gt_greedy_default);
+ gfs2_printf("greedy_quantum %u\n", gt->gt_greedy_quantum);
+ gfs2_printf("greedy_max %u\n", gt->gt_greedy_max);
+ gfs2_printf("statfs_quantum %u\n", gt->gt_statfs_quantum);
+ gfs2_printf("statfs_slow %u\n", gt->gt_statfs_slow);
+
+ error = 0;
+
+ out:
+ spin_unlock(>->gt_spin);
+
+ return error;
+}
+
+#define tune_set(f, v) \
+do { \
+ spin_lock(>->gt_spin); \
+ gt->f = (v); \
+ spin_unlock(>->gt_spin); \
+} while (0)
+
+/**
+ * gi_set_tune - Set a tuneable parameter
+ * @sdp:
+ * @gi:
+ *
+ * Returns: errno
+ */
+
+static int gi_set_tune(struct gfs2_sbd *sdp, struct gfs2_ioctl *gi)
+{
+ struct gfs2_tune *gt = &sdp->sd_tune;
+ char param[ARG_SIZE], value[ARG_SIZE];
+ unsigned int x;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+ if (gi->gi_argc != 3)
+ return -EINVAL;
+
+ if (strncpy_from_user(param, gi->gi_argv[1], ARG_SIZE) < 0)
+ return -EFAULT;
+ param[ARG_SIZE - 1] = 0;
+
+ if (strncpy_from_user(value, gi->gi_argv[2], ARG_SIZE) < 0)
+ return -EFAULT;
+ value[ARG_SIZE - 1] = 0;
+
+ if (strcmp(param, "ilimit") == 0) {
+ if (sscanf(value, "%u", &x) != 1)
+ return -EINVAL;
+ tune_set(gt_ilimit, x);
+
+ } else if (strcmp(param, "ilimit_tries") == 0) {
+ if (sscanf(value, "%u", &x) != 1)
+ return -EINVAL;
+ tune_set(gt_ilimit_tries, x);
+
+ } else if (strcmp(param, "ilimit_min") == 0) {
+ if (sscanf(value, "%u", &x) != 1)
+ return -EINVAL;
+ tune_set(gt_ilimit_min, x);
+
+ } else if (strcmp(param, "demote_secs") == 0) {
+ if (sscanf(value, "%u", &x) != 1)
+ return -EINVAL;
+ tune_set(gt_demote_secs, x);
+
+ } else if (strcmp(param, "incore_log_blocks") == 0) {
+ if (sscanf(value, "%u", &x) != 1)
+ return -EINVAL;
+ tune_set(gt_incore_log_blocks, x);
+
+ } else if (strcmp(param, "log_flush_secs") == 0) {
+ if (sscanf(value, "%u", &x) != 1)
+ return -EINVAL;
+ tune_set(gt_log_flush_secs, x);
+
+ } else if (strcmp(param, "jindex_refresh_secs") == 0) {
+ if (sscanf(value, "%u", &x) != 1)
+ return -EINVAL;
+ tune_set(gt_jindex_refresh_secs, x);
+
+ } else if (strcmp(param, "scand_secs") == 0) {
+ if (sscanf(value, "%u", &x) != 1 || !x)
+ return -EINVAL;
+ tune_set(gt_scand_secs, x);
+ wake_up_process(sdp->sd_scand_process);
+
+ } else if (strcmp(param, "recoverd_secs") == 0) {
+ if (sscanf(value, "%u", &x) != 1 || !x)
+ return -EINVAL;
+ tune_set(gt_recoverd_secs, x);
+ wake_up_process(sdp->sd_recoverd_process);
+
+ } else if (strcmp(param, "logd_secs") == 0) {
+ if (sscanf(value, "%u", &x) != 1 || !x)
+ return -EINVAL;
+ tune_set(gt_logd_secs, x);
+ wake_up_process(sdp->sd_logd_process);
+
+ } else if (strcmp(param, "quotad_secs") == 0) {
+ if (sscanf(value, "%u", &x) != 1 || !x)
+ return -EINVAL;
+ tune_set(gt_quotad_secs, x);
+ wake_up_process(sdp->sd_quotad_process);
+
+ } else if (strcmp(param, "inoded_secs") == 0) {
+ if (sscanf(value, "%u", &x) != 1 || !x)
+ return -EINVAL;
+ tune_set(gt_inoded_secs, x);
+ wake_up_process(sdp->sd_inoded_process);
+
+ } else if (strcmp(param, "quota_simul_sync") == 0) {
+ if (sscanf(value, "%u", &x) != 1 || !x)
+ return -EINVAL;
+ tune_set(gt_quota_simul_sync, x);
+
+ } else if (strcmp(param, "quota_warn_period") == 0) {
+ if (sscanf(value, "%u", &x) != 1)
+ return -EINVAL;
+ tune_set(gt_quota_warn_period, x);
+
+ } else if (strcmp(param, "quota_scale") == 0) {
+ unsigned int y;
+ if (sscanf(value, "%u %u", &x, &y) != 2 || !y)
+ return -EINVAL;
+ spin_lock(>->gt_spin);
+ gt->gt_quota_scale_num = x;
+ gt->gt_quota_scale_den = y;
+ spin_unlock(>->gt_spin);
+
+ } else if (strcmp(param, "quota_cache_secs") == 0) {
+ if (sscanf(value, "%u", &x) != 1 || !x)
+ return -EINVAL;
+ tune_set(gt_quota_cache_secs, x);
+
+ } else if (strcmp(param, "quota_quantum") == 0) {
+ if (sscanf(value, "%u", &x) != 1)
+ return -EINVAL;
+ tune_set(gt_quota_quantum, x);
+
+ } else if (strcmp(param, "atime_quantum") == 0) {
+ if (sscanf(value, "%u", &x) != 1)
+ return -EINVAL;
+ tune_set(gt_atime_quantum, x);
+
+ } else if (strcmp(param, "new_files_jdata") == 0) {
+ if (sscanf(value, "%u", &x) != 1)
+ return -EINVAL;
+ x = !!x;
+ tune_set(gt_new_files_jdata, x);
+
+ } else if (strcmp(param, "new_files_directio") == 0) {
+ if (sscanf(value, "%u", &x) != 1)
+ return -EINVAL;
+ x = !!x;
+ tune_set(gt_new_files_directio, x);
+
+ } else if (strcmp(param, "max_atomic_write") == 0) {
+ if (sscanf(value, "%u", &x) != 1 || !x)
+ return -EINVAL;
+ tune_set(gt_max_atomic_write, x);
+
+ } else if (strcmp(param, "max_readahead") == 0) {
+ if (sscanf(value, "%u", &x) != 1)
+ return -EINVAL;
+ tune_set(gt_max_readahead, x);
+
+ } else if (strcmp(param, "lockdump_size") == 0) {
+ if (sscanf(value, "%u", &x) != 1 || !x)
+ return -EINVAL;
+ tune_set(gt_lockdump_size, x);
+
+ } else if (strcmp(param, "stall_secs") == 0) {
+ if (sscanf(value, "%u", &x) != 1 || !x)
+ return -EINVAL;
+ tune_set(gt_stall_secs, x);
+
+ } else if (strcmp(param, "complain_secs") == 0) {
+ if (sscanf(value, "%u", &x) != 1)
+ return -EINVAL;
+ tune_set(gt_complain_secs, x);
+
+ } else if (strcmp(param, "reclaim_limit") == 0) {
+ if (sscanf(value, "%u", &x) != 1)
+ return -EINVAL;
+ tune_set(gt_reclaim_limit, x);
+
+ } else if (strcmp(param, "entries_per_readdir") == 0) {
+ if (sscanf(value, "%u", &x) != 1 || !x)
+ return -EINVAL;
+ tune_set(gt_entries_per_readdir, x);
+
+ } else if (strcmp(param, "prefetch_secs") == 0) {
+ if (sscanf(value, "%u", &x) != 1)
+ return -EINVAL;
+ tune_set(gt_prefetch_secs, x);
+
+ } else if (strcmp(param, "greedy_default") == 0) {
+ if (sscanf(value, "%u", &x) != 1 || !x)
+ return -EINVAL;
+ tune_set(gt_greedy_default, x);
+
+ } else if (strcmp(param, "greedy_quantum") == 0) {
+ if (sscanf(value, "%u", &x) != 1 || !x)
+ return -EINVAL;
+ tune_set(gt_greedy_quantum, x);
+
+ } else if (strcmp(param, "greedy_max") == 0) {
+ if (sscanf(value, "%u", &x) != 1 || !x)
+ return -EINVAL;
+ tune_set(gt_greedy_max, x);
+
+ } else if (strcmp(param, "statfs_quantum") == 0) {
+ if (sscanf(value, "%u", &x) != 1 || !x)
+ return -EINVAL;
+ tune_set(gt_statfs_quantum, x);
+
+ } else if (strcmp(param, "statfs_slow") == 0) {
+ if (sscanf(value, "%u", &x) != 1)
+ return -EINVAL;
+ tune_set(gt_statfs_slow, x);
+
+ } else
+ return -EINVAL;
+
+ return 0;
+}
+
+/**
+ * gi_do_shrink - throw out unused glocks
+ * @sdp:
+ * @gi:
+ *
+ * Returns: 0
+ */
+
+static int gi_do_shrink(struct gfs2_sbd *sdp, struct gfs2_ioctl *gi)
+{
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+ if (gi->gi_argc != 1)
+ return -EINVAL;
+ gfs2_gl_hash_clear(sdp, NO_WAIT);
+ return 0;
+}
+
+/**
+ * gi_get_file_stat -
+ * @ip:
+ * @gi:
+ *
+ * Returns: the number of bytes copied, or -errno
+ */
+
+static int gi_get_file_stat(struct gfs2_inode *ip, struct gfs2_ioctl *gi)
+{
+ struct gfs2_holder i_gh;
+ struct gfs2_dinode *di;
+ int error;
+
+ if (gi->gi_argc != 1)
+ return -EINVAL;
+ if (gi->gi_size != sizeof(struct gfs2_dinode))
+ return -EINVAL;
+
+ di = kmalloc(sizeof(struct gfs2_dinode), GFP_KERNEL);
+ if (!di)
+ return -ENOMEM;
+
+ error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
+ if (error)
+ goto out;
+ memcpy(di, &ip->i_di, sizeof(struct gfs2_dinode));
+ gfs2_glock_dq_uninit(&i_gh);
+
+ if (copy_to_user(gi->gi_data, di,
+ sizeof(struct gfs2_dinode)))
+ error = -EFAULT;
+ else
+ error = sizeof(struct gfs2_dinode);
+
+ out:
+ kfree(di);
+
+ return error;
+}
+
+/**
+ * gi_set_file_flag - set or clear a flag on a file
+ * @ip:
+ * @gi:
+ *
+ * Returns: errno
+ */
+
+static int gi_set_file_flag(struct gfs2_inode *ip, struct gfs2_ioctl *gi)
+{
+ char buf[ARG_SIZE];
+ int set;
+ uint32_t flag;
+ struct gfs2_holder i_gh;
+ struct buffer_head *dibh;
+ int error;
+
+ if (gi->gi_argc != 3)
+ return -EINVAL;
+
+ if (strncpy_from_user(buf, gi->gi_argv[1], ARG_SIZE) < 0)
+ return -EFAULT;
+ buf[ARG_SIZE - 1] = 0;
+
+ if (strcmp(buf, "set") == 0)
+ set = TRUE;
+ else if (strcmp(buf, "clear") == 0)
+ set = FALSE;
+ else
+ return -EINVAL;
+
+ if (strncpy_from_user(buf, gi->gi_argv[2], ARG_SIZE) < 0)
+ return -EFAULT;
+ buf[ARG_SIZE - 1] = 0;
+
+ error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
+ if (error)
+ return error;
+
+ error = -EACCES;
+ if (ip->i_di.di_uid != current->fsuid && !capable(CAP_FOWNER))
+ goto out;
+
+ error = -EINVAL;
+
+ if (strcmp(buf, "jdata") == 0) {
+ if (!S_ISREG(ip->i_di.di_mode) || ip->i_di.di_size)
+ goto out;
+ flag = GFS2_DIF_JDATA;
+ } else if (strcmp(buf, "directio") == 0) {
+ if (!S_ISREG(ip->i_di.di_mode))
+ goto out;
+ flag = GFS2_DIF_DIRECTIO;
+ } else if (strcmp(buf, "immutable") == 0) {
+ /* The IMMUTABLE flag can only be changed by
+ the relevant capability. */
+ error = -EPERM;
+ if (!capable(CAP_LINUX_IMMUTABLE))
+ goto out;
+ flag = GFS2_DIF_IMMUTABLE;
+ } else if (strcmp(buf, "appendonly") == 0) {
+ /* The APPENDONLY flag can only be changed by
+ the relevant capability. */
+ error = -EPERM;
+ if (!capable(CAP_LINUX_IMMUTABLE))
+ goto out;
+ flag = GFS2_DIF_APPENDONLY;
+ } else if (strcmp(buf, "inherit_jdata") == 0) {
+ if (!S_ISDIR(ip->i_di.di_mode))
+ goto out;
+ flag = GFS2_DIF_INHERIT_JDATA;
+ } else if (strcmp(buf, "inherit_directio") == 0) {
+ if (S_ISDIR(ip->i_di.di_mode))
+ goto out;
+ flag = GFS2_DIF_INHERIT_DIRECTIO;
+ } else
+ goto out;
+
+ error = gfs2_trans_begin(ip->i_sbd, RES_DINODE, 0);
+ if (error)
+ goto out;
+
+ error = gfs2_meta_inode_buffer(ip, &dibh);
+ if (error)
+ goto out_trans_end;
+
+ if (set)
+ ip->i_di.di_flags |= flag;
+ else
+ ip->i_di.di_flags &= ~flag;
+
+ gfs2_trans_add_bh(ip->i_gl, dibh);
+ gfs2_dinode_out(&ip->i_di, dibh->b_data);
+
+ brelse(dibh);
+
+ out_trans_end:
+ gfs2_trans_end(ip->i_sbd);
+
+ out:
+ gfs2_glock_dq_uninit(&i_gh);
+
+ return error;
+
+}
+
+static int gi_get_bmap(struct gfs2_inode *ip, struct gfs2_ioctl *gi)
+{
+ struct gfs2_holder gh;
+ uint64_t lblock, dblock = 0;
+ int new = FALSE;
+ int error;
+
+ if (gi->gi_argc != 1)
+ return -EINVAL;
+ if (gi->gi_size != sizeof(uint64_t))
+ return -EINVAL;
+
+ error = copy_from_user(&lblock, gi->gi_data, sizeof(uint64_t));
+ if (error)
+ return -EFAULT;
+
+ error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
+ if (error)
+ return error;
+
+ error = -EACCES;
+ if (ip->i_di.di_uid == current->fsuid || capable(CAP_FOWNER)) {
+ error = 0;
+ if (!gfs2_is_stuffed(ip))
+ error = gfs2_block_map(ip, lblock, &new, &dblock, NULL);
+ }
+
+ gfs2_glock_dq_uninit(&gh);
+
+ if (!error) {
+ error = copy_to_user(gi->gi_data, &dblock, sizeof(uint64_t));
+ if (error)
+ error = -EFAULT;
+ }
+
+ return error;
+}
+
+/**
+ * gi_get_file_meta - Return all the metadata for a file
+ * @ip:
+ * @gi:
+ *
+ * Returns: the number of bytes copied, or -errno
+ */
+
+static int gi_get_file_meta(struct gfs2_inode *ip, struct gfs2_ioctl *gi)
+{
+ struct gfs2_holder i_gh;
+ struct gfs2_user_buffer ub;
+ int error;
+
+ if (gi->gi_argc != 1)
+ return -EINVAL;
+
+ ub.ub_data = gi->gi_data;
+ ub.ub_size = gi->gi_size;
+ ub.ub_count = 0;
+
+ error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
+ if (error)
+ return error;
+
+ error = -EACCES;
+ if (ip->i_di.di_uid != current->fsuid && !capable(CAP_FOWNER))
+ goto out;
+
+ error = gfs2_get_file_meta(ip, &ub);
+ if (error)
+ goto out;
+
+ if (S_ISDIR(ip->i_di.di_mode) &&
+ (ip->i_di.di_flags & GFS2_DIF_EXHASH)) {
+ error = gfs2_get_dir_meta(ip, &ub);
+ if (error)
+ goto out;
+ }
+
+ if (ip->i_di.di_eattr) {
+ error = gfs2_get_eattr_meta(ip, &ub);
+ if (error)
+ goto out;
+ }
+
+ error = ub.ub_count;
+
+ out:
+ gfs2_glock_dq_uninit(&i_gh);
+
+ return error;
+}
+
+/**
+ * gi_do_file_flush - sync out all dirty data and
+ * drop the cache (and lock) for a file.
+ * @ip:
+ * @gi:
+ *
+ * Returns: errno
+ */
+
+static int gi_do_file_flush(struct gfs2_inode *ip, struct gfs2_ioctl *gi)
+{
+ if (gi->gi_argc != 1)
+ return -EINVAL;
+ gfs2_glock_force_drop(ip->i_gl);
+ return 0;
+}
+
+/**
+ * gi2hip - return the "struct gfs2_inode" for a hidden file
+ * @sdp:
+ * @gi:
+ *
+ * Returns: the "struct gfs2_inode"
+ */
+
+static struct gfs2_inode *gi2hip(struct gfs2_sbd *sdp, struct gfs2_ioctl *gi)
+{
+ char buf[ARG_SIZE];
+
+ if (gi->gi_argc != 2)
+ return ERR_PTR(-EINVAL);
+
+ if (strncpy_from_user(buf, gi->gi_argv[1], ARG_SIZE) < 0)
+ return ERR_PTR(-EFAULT);
+ buf[ARG_SIZE - 1] = 0;
+
+ if (strcmp(buf, "jindex") == 0)
+ return sdp->sd_jindex;
+ if (strcmp(buf, "rindex") == 0)
+ return sdp->sd_rindex;
+ if (strcmp(buf, "quota") == 0)
+ return sdp->sd_quota_inode;
+
+ return ERR_PTR(-EINVAL);
+}
+
+/**
+ * gi_get_hfile_stat - get stat info on a hidden file
+ * @sdp:
+ * @gi:
+ *
+ * Returns: the number of bytes copied, or -errno
+ */
+
+static int gi_get_hfile_stat(struct gfs2_sbd *sdp, struct gfs2_ioctl *gi)
+{
+ struct gfs2_inode *ip;
+ struct gfs2_dinode *di;
+ struct gfs2_holder i_gh;
+ int error;
+
+ ip = gi2hip(sdp, gi);
+ if (IS_ERR(ip))
+ return PTR_ERR(ip);
+
+ if (gi->gi_size != sizeof(struct gfs2_dinode))
+ return -EINVAL;
+
+ di = kmalloc(sizeof(struct gfs2_dinode), GFP_KERNEL);
+ if (!di)
+ return -ENOMEM;
+
+ error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
+ if (error)
+ goto out;
+ memcpy(di, &ip->i_di, sizeof(struct gfs2_dinode));
+ gfs2_glock_dq_uninit(&i_gh);
+
+ if (copy_to_user(gi->gi_data, di,
+ sizeof(struct gfs2_dinode)))
+ error = -EFAULT;
+ else
+ error = sizeof(struct gfs2_dinode);
+
+ out:
+ kfree(di);
+
+ return error;
+}
+
+/**
+ * gi_do_hfile_read - Read data from a hidden file
+ * @sdp:
+ * @gi:
+ *
+ * Returns: the number of bytes read, or -errno
+ */
+
+static int gi_do_hfile_read(struct gfs2_sbd *sdp, struct gfs2_ioctl *gi)
+{
+ struct gfs2_inode *ip;
+ struct gfs2_holder i_gh;
+ int error;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+
+ ip = gi2hip(sdp, gi);
+ if (IS_ERR(ip))
+ return PTR_ERR(ip);
+
+ if (!S_ISREG(ip->i_di.di_mode))
+ return -EINVAL;
+
+ if (!access_ok(VERIFY_WRITE, gi->gi_data, gi->gi_size))
+ return -EFAULT;
+
+ error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
+ if (error)
+ return error;
+
+ error = gfs2_jdata_read(ip, gi->gi_data, gi->gi_offset, gi->gi_size,
+ gfs2_copy2user);
+
+ gfs2_glock_dq_uninit(&i_gh);
+
+ return error;
+}
+
+/**
+ * gi_do_hfile_write - Write data to a hidden file
+ * @sdp:
+ * @gi:
+ *
+ * Returns: the number of bytes written, or -errno
+ */
+
+static int gi_do_hfile_write(struct gfs2_sbd *sdp, struct gfs2_ioctl *gi)
+{
+ struct gfs2_inode *ip;
+ struct gfs2_alloc *al = NULL;
+ struct gfs2_holder i_gh;
+ unsigned int data_blocks, ind_blocks;
+ int alloc_required;
+ int error;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+
+ ip = gi2hip(sdp, gi);
+ if (IS_ERR(ip))
+ return PTR_ERR(ip);
+
+ if (!S_ISREG(ip->i_di.di_mode))
+ return -EINVAL;
+
+ if (!access_ok(VERIFY_READ, gi->gi_data, gi->gi_size))
+ return -EFAULT;
+
+ gfs2_write_calc_reserv(ip, gi->gi_size, &data_blocks, &ind_blocks);
+
+ error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE,
+ LM_FLAG_PRIORITY, &i_gh);
+ if (error)
+ return error;
+
+ if (!gfs2_is_jdata(ip)) {
+ gfs2_consist_inode(ip);
+ error = -EIO;
+ goto out;
+ }
+
+ error = gfs2_write_alloc_required(ip, gi->gi_offset, gi->gi_size,
+ &alloc_required);
+ if (error)
+ goto out;
+
+ if (alloc_required) {
+ al = gfs2_alloc_get(ip);
+
+ al->al_requested = data_blocks + ind_blocks;
+
+ error = gfs2_inplace_reserve(ip);
+ if (error)
+ goto out_alloc;
+
+ error = gfs2_trans_begin(sdp,
+ al->al_rgd->rd_ri.ri_length +
+ data_blocks + ind_blocks +
+ RES_DINODE + RES_STATFS, 0);
+ if (error)
+ goto out_relse;
+ } else {
+ error = gfs2_trans_begin(sdp, data_blocks + RES_DINODE, 0);
+ if (error)
+ goto out;
+ }
+
+ error = gfs2_jdata_write(ip, gi->gi_data, gi->gi_offset, gi->gi_size,
+ gfs2_copy_from_user);
+
+ gfs2_trans_end(sdp);
+
+ out_relse:
+ if (alloc_required)
+ gfs2_inplace_release(ip);
+
+ out_alloc:
+ if (alloc_required)
+ gfs2_alloc_put(ip);
+
+ out:
+ gfs2_glock_dq_uninit(&i_gh);
+
+ return error;
+}
+
+/**
+ * gi_do_hfile_trunc - truncate a hidden file
+ * @sdp:
+ * @gi:
+ *
+ * Returns: the number of bytes copied, or -errno
+ */
+
+static int gi_do_hfile_trunc(struct gfs2_sbd *sdp, struct gfs2_ioctl *gi)
+{
+ struct gfs2_inode *ip;
+ struct gfs2_holder i_gh;
+ int error;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+
+ ip = gi2hip(sdp, gi);
+ if (IS_ERR(ip))
+ return PTR_ERR(ip);
+
+ if (!S_ISREG(ip->i_di.di_mode))
+ return -EINVAL;
+
+ error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
+ if (error)
+ return error;
+
+ error = gfs2_truncatei(ip, gi->gi_offset, NULL);
+
+ gfs2_glock_dq_uninit(&i_gh);
+
+ return error;
+}
+
+/**
+ * gi_do_quota_sync - sync the outstanding quota changes for a FS
+ * @sdp:
+ * @gi:
+ *
+ * Returns: errno
+ */
+
+static int gi_do_quota_sync(struct gfs2_sbd *sdp, struct gfs2_ioctl *gi)
+{
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+ if (gi->gi_argc != 1)
+ return -EINVAL;
+ return gfs2_quota_sync(sdp);
+}
+
+/**
+ * gi_do_quota_refresh - Refresh the a quota LVB from the quota file
+ * @sdp:
+ * @gi:
+ *
+ * Returns: errno
+ */
+
+static int gi_do_quota_refresh(struct gfs2_sbd *sdp, struct gfs2_ioctl *gi)
+{
+ char buf[ARG_SIZE];
+ int user;
+ uint32_t id;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+ if (gi->gi_argc != 2)
+ return -EINVAL;
+
+ if (strncpy_from_user(buf, gi->gi_argv[1], ARG_SIZE) < 0)
+ return -EFAULT;
+ buf[ARG_SIZE - 1] = 0;
+
+ switch (buf[0]) {
+ case 'u':
+ user = TRUE;
+ break;
+ case 'g':
+ user = FALSE;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (buf[1] != ':')
+ return -EINVAL;
+
+ if (sscanf(buf + 2, "%u", &id) != 1)
+ return -EINVAL;
+
+ return gfs2_quota_refresh(sdp, user, id);
+}
+
+/**
+ * gi_do_quota_read - read quota values from the quota file
+ * @sdp:
+ * @gi:
+ *
+ * Returns: errno
+ */
+
+static int gi_do_quota_read(struct gfs2_sbd *sdp, struct gfs2_ioctl *gi)
+{
+ char buf[ARG_SIZE];
+ int user;
+ uint32_t id;
+ struct gfs2_quota q;
+ int error;
+
+ if (gi->gi_argc != 2)
+ return -EINVAL;
+ if (gi->gi_size != sizeof(struct gfs2_quota))
+ return -EINVAL;
+
+ if (strncpy_from_user(buf, gi->gi_argv[1], ARG_SIZE) < 0)
+ return -EFAULT;
+ buf[ARG_SIZE - 1] = 0;
+
+ switch (buf[0]) {
+ case 'u':
+ user = TRUE;
+ break;
+ case 'g':
+ user = FALSE;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (buf[1] != ':')
+ return -EINVAL;
+
+ if (sscanf(buf + 2, "%u", &id) != 1)
+ return -EINVAL;
+
+ error = gfs2_quota_read(sdp, user, id, &q);
+ if (error)
+ return error;
+
+ if (copy_to_user(gi->gi_data, &q, sizeof(struct gfs2_quota)))
+ return -EFAULT;
+
+ return 0;
+}
+
+/**
+ * gi_do_statfs_sync - sync the outstanding statfs changes for a FS
+ * @sdp:
+ * @gi:
+ *
+ * Returns: errno
+ */
+
+static int gi_do_statfs_sync(struct gfs2_sbd *sdp, struct gfs2_ioctl *gi)
+{
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+ if (gi->gi_argc != 1)
+ return -EINVAL;
+ return gfs2_statfs_sync(sdp);
+}
+
+static int gi_resize_add_rgrps(struct gfs2_sbd *sdp, struct gfs2_ioctl *gi)
+{
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+ if (gi->gi_argc != 1)
+ return -EINVAL;
+ if (gi->gi_size % sizeof(struct gfs2_rindex))
+ return -EINVAL;
+
+ return gfs2_resize_add_rgrps(sdp, gi->gi_data, gi->gi_size);
+}
+
+static int gi_rename2system(struct gfs2_sbd *sdp, struct gfs2_ioctl *gi)
+{
+ char new_dir[ARG_SIZE], new_name[ARG_SIZE];
+ struct gfs2_inode *old_dip, *ip, *new_dip;
+ int put_new_dip = FALSE;
+ int error;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+ if (gi->gi_argc != 3)
+ return -EINVAL;
+
+ if (strncpy_from_user(new_dir, gi->gi_argv[1], ARG_SIZE) < 0)
+ return -EFAULT;
+ new_dir[ARG_SIZE - 1] = 0;
+ if (strncpy_from_user(new_name, gi->gi_argv[2], ARG_SIZE) < 0)
+ return -EFAULT;
+ new_name[ARG_SIZE - 1] = 0;
+
+ error = gfs2_lookup_simple(sdp->sd_root_dir, ".gfs2_admin", &old_dip);
+ if (error)
+ return error;
+
+ error = -ENOTDIR;
+ if (!S_ISDIR(old_dip->i_di.di_mode))
+ goto out;
+
+ error = gfs2_lookup_simple(old_dip, "new_inode", &ip);
+ if (error)
+ goto out;
+
+ if (!strcmp(new_dir, "per_node")) {
+ error = gfs2_lookup_simple(sdp->sd_master_dir, "per_node",
+ &new_dip);
+ if (error)
+ goto out2;
+ put_new_dip = TRUE;
+ } else if (!strcmp(new_dir, "jindex"))
+ new_dip = sdp->sd_jindex;
+ else {
+ error = -EINVAL;
+ goto out2;
+ }
+
+ error = gfs2_rename2system(ip, old_dip, "new_inode", new_dip, new_name);
+
+ if (put_new_dip)
+ gfs2_inode_put(new_dip);
+
+ out2:
+ gfs2_inode_put(ip);
+
+ out:
+ gfs2_inode_put(old_dip);
+
+ return error;
+}
+
+/**
+ * gfs2_ioctl_i -
+ * @ip:
+ * @arg:
+ *
+ * Returns: -errno or positive byte count
+ */
+
+int gfs2_ioctl_i(struct gfs2_inode *ip, void *arg)
+{
+ struct gfs2_ioctl *gi_user = (struct gfs2_ioctl *)arg;
+ struct gfs2_ioctl gi;
+ char **argv;
+ char arg0[ARG_SIZE];
+ int error = -EFAULT;
+
+ if (copy_from_user(&gi, gi_user, sizeof(struct gfs2_ioctl)))
+ return -EFAULT;
+ if (!gi.gi_argc)
+ return -EINVAL;
+ argv = kcalloc(gi.gi_argc, sizeof(char *), GFP_KERNEL);
+ if (!argv)
+ return -ENOMEM;
+ if (copy_from_user(argv, gi.gi_argv,
+ gi.gi_argc * sizeof(char *)))
+ goto out;
+ gi.gi_argv = argv;
+
+ if (strncpy_from_user(arg0, argv[0], ARG_SIZE) < 0)
+ goto out;
+ arg0[ARG_SIZE - 1] = 0;
+
+ if (strcmp(arg0, "get_cookie") == 0)
+ error = gi_skeleton(ip, &gi, gi_get_cookie);
+ else if (strcmp(arg0, "get_super") == 0)
+ error = gi_get_super(ip->i_sbd, &gi);
+ else if (strcmp(arg0, "get_args") == 0)
+ error = gi_skeleton(ip, &gi, gi_get_args);
+ else if (strcmp(arg0, "get_lockstruct") == 0)
+ error = gi_skeleton(ip, &gi, gi_get_lockstruct);
+ else if (strcmp(arg0, "get_statfs") == 0)
+ error = gi_skeleton(ip, &gi, gi_get_statfs);
+ else if (strcmp(arg0, "get_counters") == 0)
+ error = gi_skeleton(ip, &gi, gi_get_counters);
+ else if (strcmp(arg0, "get_tune") == 0)
+ error = gi_skeleton(ip, &gi, gi_get_tune);
+ else if (strcmp(arg0, "set_tune") == 0)
+ error = gi_set_tune(ip->i_sbd, &gi);
+ else if (strcmp(arg0, "do_shrink") == 0)
+ error = gi_do_shrink(ip->i_sbd, &gi);
+ else if (strcmp(arg0, "get_file_stat") == 0)
+ error = gi_get_file_stat(ip, &gi);
+ else if (strcmp(arg0, "set_file_flag") == 0)
+ error = gi_set_file_flag(ip, &gi);
+ else if (strcmp(arg0, "get_bmap") == 0)
+ error = gi_get_bmap(ip, &gi);
+ else if (strcmp(arg0, "get_file_meta") == 0)
+ error = gi_get_file_meta(ip, &gi);
+ else if (strcmp(arg0, "do_file_flush") == 0)
+ error = gi_do_file_flush(ip, &gi);
+ else if (strcmp(arg0, "get_hfile_stat") == 0)
+ error = gi_get_hfile_stat(ip->i_sbd, &gi);
+ else if (strcmp(arg0, "do_hfile_read") == 0)
+ error = gi_do_hfile_read(ip->i_sbd, &gi);
+ else if (strcmp(arg0, "do_hfile_write") == 0)
+ error = gi_do_hfile_write(ip->i_sbd, &gi);
+ else if (strcmp(arg0, "do_hfile_trunc") == 0)
+ error = gi_do_hfile_trunc(ip->i_sbd, &gi);
+ else if (strcmp(arg0, "do_quota_sync") == 0)
+ error = gi_do_quota_sync(ip->i_sbd, &gi);
+ else if (strcmp(arg0, "do_quota_refresh") == 0)
+ error = gi_do_quota_refresh(ip->i_sbd, &gi);
+ else if (strcmp(arg0, "do_quota_read") == 0)
+ error = gi_do_quota_read(ip->i_sbd, &gi);
+ else if (strcmp(arg0, "do_statfs_sync") == 0)
+ error = gi_do_statfs_sync(ip->i_sbd, &gi);
+ else if (strcmp(arg0, "resize_add_rgrps") == 0)
+ error = gi_resize_add_rgrps(ip->i_sbd, &gi);
+ else if (strcmp(arg0, "rename2system") == 0)
+ error = gi_rename2system(ip->i_sbd, &gi);
+ else
+ error = -ENOTTY;
+
+ out:
+ kfree(argv);
+
+ return error;
+}
+
--- a/fs/gfs2/ioctl.h 1970-01-01 07:30:00.000000000 +0730
+++ b/fs/gfs2/ioctl.h 2005-09-01 17:36:55.324114104 +0800
@@ -0,0 +1,15 @@
+/*
+ * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
+ * Copyright (C) 2004-2005 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.
+ */
+
+#ifndef __IOCTL_DOT_H__
+#define __IOCTL_DOT_H__
+
+int gfs2_ioctl_i(struct gfs2_inode *ip, void *arg);
+
+#endif /* __IOCTL_DOT_H__ */
--- a/fs/gfs2/sys.c 1970-01-01 07:30:00.000000000 +0730
+++ b/fs/gfs2/sys.c 2005-09-01 17:36:55.507086288 +0800
@@ -0,0 +1,201 @@
+/*
+ * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
+ * Copyright (C) 2004-2005 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.
+ */
+
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/smp_lock.h>
+#include <linux/spinlock.h>
+#include <linux/completion.h>
+#include <linux/buffer_head.h>
+#include <linux/module.h>
+#include <linux/kobject.h>
+#include <asm/semaphore.h>
+#include <asm/uaccess.h>
+
+#include "gfs2.h"
+#include "lm.h"
+#include "sys.h"
+#include "super.h"
+
+char *gfs2_sys_margs;
+spinlock_t gfs2_sys_margs_lock;
+
+static ssize_t gfs2_id_show(struct gfs2_sbd *sdp, char *buf)
+{
+ return sprintf(buf, "%s\n", sdp->sd_vfs->s_id);
+}
+
+static ssize_t gfs2_fsname_show(struct gfs2_sbd *sdp, char *buf)
+{
+ return sprintf(buf, "%s\n", sdp->sd_fsname);
+}
+
+static ssize_t gfs2_freeze_show(struct gfs2_sbd *sdp, char *buf)
+{
+ unsigned int count;
+
+ down(&sdp->sd_freeze_lock);
+ count = sdp->sd_freeze_count;
+ up(&sdp->sd_freeze_lock);
+
+ return sprintf(buf, "%u\n", count);
+}
+
+static ssize_t gfs2_freeze_store(struct gfs2_sbd *sdp, const char *buf,
+ size_t len)
+{
+ ssize_t ret = len;
+ int error = 0;
+ int n = simple_strtol(buf, NULL, 0);
+
+ switch (n) {
+ case 0:
+ gfs2_unfreeze_fs(sdp);
+ break;
+ case 1:
+ error = gfs2_freeze_fs(sdp);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ if (error)
+ fs_warn(sdp, "freeze %d error %d", n, error);
+
+ return ret;
+}
+
+static ssize_t gfs2_withdraw_show(struct gfs2_sbd *sdp, char *buf)
+{
+ unsigned int b = test_bit(SDF_SHUTDOWN, &sdp->sd_flags);
+ return sprintf(buf, "%u\n", b);
+}
+
+static ssize_t gfs2_withdraw_store(struct gfs2_sbd *sdp, const char *buf,
+ size_t len)
+{
+ ssize_t ret = len;
+ int n = simple_strtol(buf, NULL, 0);
+
+ if (n != 1) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ gfs2_lm_withdraw(sdp,
+ "GFS2: fsid=%s: withdrawing from cluster at user's request\n",
+ sdp->sd_fsname);
+ out:
+ return ret;
+}
+
+struct gfs2_attr {
+ struct attribute attr;
+ ssize_t (*show)(struct gfs2_sbd*, char *);
+ ssize_t (*store)(struct gfs2_sbd*, const char *, size_t);
+};
+
+static struct gfs2_attr gfs2_attr_id = {
+ .attr = {.name = "id", .mode = S_IRUSR},
+ .show = gfs2_id_show
+};
+
+static struct gfs2_attr gfs2_attr_fsname = {
+ .attr = {.name = "fsname", .mode = S_IRUSR},
+ .show = gfs2_fsname_show
+};
+
+static struct gfs2_attr gfs2_attr_freeze = {
+ .attr = {.name = "freeze", .mode = S_IRUSR | S_IWUSR},
+ .show = gfs2_freeze_show,
+ .store = gfs2_freeze_store
+};
+
+static struct gfs2_attr gfs2_attr_withdraw = {
+ .attr = {.name = "withdraw", .mode = S_IRUSR | S_IWUSR},
+ .show = gfs2_withdraw_show,
+ .store = gfs2_withdraw_store
+};
+
+static struct attribute *gfs2_attrs[] = {
+ &gfs2_attr_id.attr,
+ &gfs2_attr_fsname.attr,
+ &gfs2_attr_freeze.attr,
+ &gfs2_attr_withdraw.attr,
+ NULL,
+};
+
+static ssize_t gfs2_attr_show(struct kobject *kobj, struct attribute *attr,
+ char *buf)
+{
+ struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
+ struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
+ return a->show ? a->show(sdp, buf) : 0;
+}
+
+static ssize_t gfs2_attr_store(struct kobject *kobj, struct attribute *attr,
+ const char *buf, size_t len)
+{
+ struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
+ struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
+ return a->store ? a->store(sdp, buf, len) : len;
+}
+
+static struct sysfs_ops gfs2_attr_ops = {
+ .show = gfs2_attr_show,
+ .store = gfs2_attr_store,
+};
+
+static struct kobj_type gfs2_ktype = {
+ .default_attrs = gfs2_attrs,
+ .sysfs_ops = &gfs2_attr_ops,
+};
+
+/* FIXME: should this go under /sys/fs/ ? */
+
+static struct kset gfs2_kset = {
+ .subsys = &kernel_subsys,
+ .kobj = {.name = "gfs2",},
+ .ktype = &gfs2_ktype,
+};
+
+int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
+{
+ int error;
+
+ error = kobject_set_name(&sdp->sd_kobj, "%s", sdp->sd_fsname);
+ if (error)
+ goto out;
+
+ sdp->sd_kobj.kset = &gfs2_kset;
+ sdp->sd_kobj.ktype = &gfs2_ktype;
+
+ error = kobject_register(&sdp->sd_kobj);
+ out:
+ return error;
+}
+
+void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
+{
+ kobject_unregister(&sdp->sd_kobj);
+}
+
+int gfs2_sys_init(void)
+{
+ gfs2_sys_margs = NULL;
+ spin_lock_init(&gfs2_sys_margs_lock);
+ return kset_register(&gfs2_kset);
+}
+
+void gfs2_sys_uninit(void)
+{
+ kfree(gfs2_sys_margs);
+ kset_unregister(&gfs2_kset);
+}
+
--- a/fs/gfs2/sys.h 1970-01-01 07:30:00.000000000 +0730
+++ b/fs/gfs2/sys.h 2005-09-01 17:36:55.517084768 +0800
@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
+ * Copyright (C) 2004-2005 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.
+ */
+
+#ifndef __SYS_DOT_H__
+#define __SYS_DOT_H__
+
+/* Allow args to be passed to GFS2 when using an initial ram disk */
+extern char *gfs2_sys_margs;
+extern spinlock_t gfs2_sys_margs_lock;
+
+int gfs2_sys_fs_add(struct gfs2_sbd *sdp);
+void gfs2_sys_fs_del(struct gfs2_sbd *sdp);
+
+int gfs2_sys_init(void);
+void gfs2_sys_uninit(void);
+
+#endif /* __SYS_DOT_H__ */
+
--- a/fs/gfs2/resize.c 1970-01-01 07:30:00.000000000 +0730
+++ b/fs/gfs2/resize.c 2005-09-01 17:36:55.452094648 +0800
@@ -0,0 +1,285 @@
+/*
+ * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
+ * Copyright (C) 2004-2005 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.
+ */
+
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/smp_lock.h>
+#include <linux/spinlock.h>
+#include <linux/completion.h>
+#include <linux/buffer_head.h>
+#include <asm/semaphore.h>
+
+#include "gfs2.h"
+#include "bmap.h"
+#include "dir.h"
+#include "glock.h"
+#include "inode.h"
+#include "jdata.h"
+#include "meta_io.h"
+#include "quota.h"
+#include "resize.h"
+#include "rgrp.h"
+#include "super.h"
+#include "trans.h"
+
+int gfs2_resize_add_rgrps(struct gfs2_sbd *sdp, char __user *buf,
+ unsigned int size)
+{
+ unsigned int num = size / sizeof(struct gfs2_rindex);
+ struct gfs2_inode *ip = sdp->sd_rindex;
+ struct gfs2_alloc *al = NULL;
+ struct gfs2_holder i_gh;
+ unsigned int data_blocks, ind_blocks;
+ int alloc_required;
+ unsigned int x;
+ int error;
+
+ gfs2_write_calc_reserv(ip, size, &data_blocks, &ind_blocks);
+
+ error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE,
+ LM_FLAG_PRIORITY | GL_SYNC, &i_gh);
+ if (error)
+ return error;
+
+ if (!gfs2_is_jdata(ip)) {
+ gfs2_consist_inode(ip);
+ error = -EIO;
+ goto out;
+ }
+
+ error = gfs2_write_alloc_required(ip, ip->i_di.di_size, size,
+ &alloc_required);
+ if (error)
+ goto out;
+
+ if (alloc_required) {
+ al = gfs2_alloc_get(ip);
+
+ al->al_requested = data_blocks + ind_blocks;
+
+ error = gfs2_inplace_reserve(ip);
+ if (error)
+ goto out_alloc;
+
+ error = gfs2_trans_begin(sdp,
+ al->al_rgd->rd_ri.ri_length +
+ data_blocks + ind_blocks +
+ RES_DINODE + RES_STATFS, 0);
+ if (error)
+ goto out_relse;
+ } else {
+ error = gfs2_trans_begin(sdp, data_blocks +
+ RES_DINODE + RES_STATFS, 0);
+ if (error)
+ goto out;
+ }
+
+ for (x = 0; x < num; x++) {
+ struct gfs2_rindex ri;
+ char ri_buf[sizeof(struct gfs2_rindex)];
+
+ error = copy_from_user(&ri, buf, sizeof(struct gfs2_rindex));
+ if (error) {
+ error = -EFAULT;
+ goto out_trans;
+ }
+ gfs2_rindex_out(&ri, ri_buf);
+
+ error = gfs2_jdata_write_mem(ip, ri_buf, ip->i_di.di_size,
+ sizeof(struct gfs2_rindex));
+ if (error < 0)
+ goto out_trans;
+ gfs2_assert_withdraw(sdp, error == sizeof(struct gfs2_rindex));
+ error = 0;
+
+ gfs2_statfs_change(sdp, ri.ri_data, ri.ri_data, 0);
+
+ buf += sizeof(struct gfs2_rindex);
+ }
+
+ out_trans:
+ gfs2_trans_end(sdp);
+
+ out_relse:
+ if (alloc_required)
+ gfs2_inplace_release(ip);
+
+ out_alloc:
+ if (alloc_required)
+ gfs2_alloc_put(ip);
+
+ out:
+ ip->i_gl->gl_vn++;
+ gfs2_glock_dq_uninit(&i_gh);
+
+ return error;
+}
+
+static void drop_dentries(struct gfs2_inode *ip)
+{
+ struct inode *inode;
+ struct dentry *d;
+
+ inode = gfs2_ip2v_lookup(ip);
+ if (!inode)
+ return;
+
+ restart:
+ spin_lock(&dcache_lock);
+ list_for_each_entry(d, &inode->i_dentry, d_alias) {
+ if (d_unhashed(d))
+ continue;
+ dget_locked(d);
+ __d_drop(d);
+ spin_unlock(&dcache_lock);
+ dput(d);
+ goto restart;
+ }
+ spin_unlock(&dcache_lock);
+
+ iput(inode);
+}
+
+int gfs2_rename2system(struct gfs2_inode *ip,
+ struct gfs2_inode *old_dip, char *old_name,
+ struct gfs2_inode *new_dip, char *new_name)
+{
+ struct gfs2_sbd *sdp = ip->i_sbd;
+ struct gfs2_holder ghs[3];
+ struct qstr old_qstr, new_qstr;
+ struct gfs2_inum inum;
+ int alloc_required;
+ struct buffer_head *dibh;
+ int error;
+
+ gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, ghs);
+ gfs2_holder_init(old_dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
+ gfs2_holder_init(new_dip->i_gl, LM_ST_EXCLUSIVE, GL_SYNC, ghs + 2);
+
+ error = gfs2_glock_nq_m(3, ghs);
+ if (error)
+ goto out;
+
+ error = -EMLINK;
+ if (ip->i_di.di_nlink != 1)
+ goto out_gunlock;
+ error = -EINVAL;
+ if (!S_ISREG(ip->i_di.di_mode))
+ goto out_gunlock;
+
+ old_qstr.name = old_name;
+ old_qstr.len = strlen(old_name);
+ error = gfs2_dir_search(old_dip, &old_qstr, &inum, NULL);
+ switch (error) {
+ case 0:
+ break;
+ default:
+ goto out_gunlock;
+ }
+
+ error = -EINVAL;
+ if (!gfs2_inum_equal(&inum, &ip->i_num))
+ goto out_gunlock;
+
+ new_qstr.name = new_name;
+ new_qstr.len = strlen(new_name);
+ error = gfs2_dir_search(new_dip, &new_qstr, NULL, NULL);
+ switch (error) {
+ case -ENOENT:
+ break;
+ case 0:
+ error = -EEXIST;
+ default:
+ goto out_gunlock;
+ }
+
+ gfs2_alloc_get(ip);
+
+ error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
+ if (error)
+ goto out_alloc;
+
+ error = gfs2_diradd_alloc_required(new_dip, &new_qstr, &alloc_required);
+ if (error)
+ goto out_unhold;
+
+ if (alloc_required) {
+ struct gfs2_alloc *al = gfs2_alloc_get(new_dip);
+
+ al->al_requested = sdp->sd_max_dirres;
+
+ error = gfs2_inplace_reserve(new_dip);
+ if (error)
+ goto out_alloc2;
+
+ error = gfs2_trans_begin(sdp,
+ sdp->sd_max_dirres +
+ al->al_rgd->rd_ri.ri_length +
+ 3 * RES_DINODE + RES_LEAF +
+ RES_STATFS + RES_QUOTA, 0);
+ if (error)
+ goto out_ipreserv;
+ } else {
+ error = gfs2_trans_begin(sdp,
+ 3 * RES_DINODE + 2 * RES_LEAF +
+ RES_QUOTA, 0);
+ if (error)
+ goto out_unhold;
+ }
+
+ error = gfs2_dir_del(old_dip, &old_qstr);
+ if (error)
+ goto out_trans;
+
+ error = gfs2_dir_add(new_dip, &new_qstr, &ip->i_num,
+ IF2DT(ip->i_di.di_mode));
+ if (error)
+ goto out_trans;
+
+ gfs2_quota_change(ip, -ip->i_di.di_blocks, ip->i_di.di_uid,
+ ip->i_di.di_gid);
+
+ error = gfs2_meta_inode_buffer(ip, &dibh);
+ if (error)
+ goto out_trans;
+ ip->i_di.di_flags |= GFS2_DIF_SYSTEM;
+ gfs2_trans_add_bh(ip->i_gl, dibh);
+ gfs2_dinode_out(&ip->i_di, dibh->b_data);
+ brelse(dibh);
+
+ drop_dentries(ip);
+
+ out_trans:
+ gfs2_trans_end(sdp);
+
+ out_ipreserv:
+ if (alloc_required)
+ gfs2_inplace_release(new_dip);
+
+ out_alloc2:
+ if (alloc_required)
+ gfs2_alloc_put(new_dip);
+
+ out_unhold:
+ gfs2_quota_unhold(ip);
+
+ out_alloc:
+ gfs2_alloc_put(ip);
+
+ out_gunlock:
+ gfs2_glock_dq_m(3, ghs);
+
+ out:
+ gfs2_holder_uninit(ghs);
+ gfs2_holder_uninit(ghs + 1);
+ gfs2_holder_uninit(ghs + 2);
+
+ return error;
+}
+
--- a/fs/gfs2/resize.h 1970-01-01 07:30:00.000000000 +0730
+++ b/fs/gfs2/resize.h 2005-09-01 17:36:55.461093280 +0800
@@ -0,0 +1,19 @@
+/*
+ * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
+ * Copyright (C) 2004-2005 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.
+ */
+
+#ifndef __RESIZE_DOT_H__
+#define __RESIZE_DOT_H__
+
+int gfs2_resize_add_rgrps(struct gfs2_sbd *sdp, char __user *buf,
+ unsigned int size);
+int gfs2_rename2system(struct gfs2_inode *ip,
+ struct gfs2_inode *old_dip, char *old_name,
+ struct gfs2_inode *new_dip, char *new_name);
+
+#endif /* __RESIZE_DOT_H__ */
--- a/fs/gfs2/mount.c 1970-01-01 07:30:00.000000000 +0730
+++ b/fs/gfs2/mount.c 2005-09-01 17:36:55.391103920 +0800
@@ -0,0 +1,209 @@
+/*
+ * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
+ * Copyright (C) 2004-2005 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.
+ */
+
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/smp_lock.h>
+#include <linux/spinlock.h>
+#include <linux/completion.h>
+#include <linux/buffer_head.h>
+#include <asm/semaphore.h>
+
+#include "gfs2.h"
+#include "mount.h"
+#include "sys.h"
+
+/**
+ * gfs2_mount_args - Parse mount options
+ * @sdp:
+ * @data:
+ *
+ * Return: errno
+ */
+
+int gfs2_mount_args(struct gfs2_sbd *sdp, char *data_arg, int remount)
+{
+ struct gfs2_args *args = &sdp->sd_args;
+ char *data = data_arg;
+ char *options, *o, *v;
+ int error = 0;
+
+ if (!remount) {
+ /* If someone preloaded options, use those instead */
+ spin_lock(&gfs2_sys_margs_lock);
+ if (gfs2_sys_margs) {
+ data = gfs2_sys_margs;
+ gfs2_sys_margs = NULL;
+ }
+ spin_unlock(&gfs2_sys_margs_lock);
+
+ /* Set some defaults */
+ args->ar_num_glockd = GFS2_GLOCKD_DEFAULT;
+ args->ar_quota = GFS2_QUOTA_DEFAULT;
+ args->ar_data = GFS2_DATA_DEFAULT;
+ }
+
+ /* Split the options into tokens with the "," character and
+ process them */
+
+ for (options = data; (o = strsep(&options, ",")); ) {
+ if (!*o)
+ continue;
+
+ v = strchr(o, '=');
+ if (v)
+ *v++ = 0;
+
+ if (!strcmp(o, "lockproto")) {
+ if (!v)
+ goto need_value;
+ if (remount && strcmp(v, args->ar_lockproto))
+ goto cant_remount;
+ strncpy(args->ar_lockproto, v, GFS2_LOCKNAME_LEN);
+ args->ar_lockproto[GFS2_LOCKNAME_LEN - 1] = 0;
+ }
+
+ else if (!strcmp(o, "locktable")) {
+ if (!v)
+ goto need_value;
+ if (remount && strcmp(v, args->ar_locktable))
+ goto cant_remount;
+ strncpy(args->ar_locktable, v, GFS2_LOCKNAME_LEN);
+ args->ar_locktable[GFS2_LOCKNAME_LEN - 1] = 0;
+ }
+
+ else if (!strcmp(o, "hostdata")) {
+ if (!v)
+ goto need_value;
+ if (remount && strcmp(v, args->ar_hostdata))
+ goto cant_remount;
+ strncpy(args->ar_hostdata, v, GFS2_LOCKNAME_LEN);
+ args->ar_hostdata[GFS2_LOCKNAME_LEN - 1] = 0;
+ }
+
+ else if (!strcmp(o, "spectator")) {
+ if (remount && !args->ar_spectator)
+ goto cant_remount;
+ args->ar_spectator = TRUE;
+ sdp->sd_vfs->s_flags |= MS_RDONLY;
+
+ } else if (!strcmp(o, "ignore_local_fs")) {
+ if (remount && !args->ar_ignore_local_fs)
+ goto cant_remount;
+ args->ar_ignore_local_fs = TRUE;
+
+ } else if (!strcmp(o, "localflocks")) {
+ if (remount && !args->ar_localflocks)
+ goto cant_remount;
+ args->ar_localflocks = TRUE;
+
+ } else if (!strcmp(o, "localcaching")) {
+ if (remount && !args->ar_localcaching)
+ goto cant_remount;
+ args->ar_localcaching = TRUE;
+
+ } else if (!strcmp(o, "oopses_ok"))
+ args->ar_oopses_ok = TRUE;
+
+ else if (!strcmp(o, "nooopses_ok"))
+ args->ar_oopses_ok = FALSE;
+
+ else if (!strcmp(o, "debug")) {
+ args->ar_debug = TRUE;
+
+ } else if (!strcmp(o, "nodebug"))
+ args->ar_debug = FALSE;
+
+ else if (!strcmp(o, "upgrade")) {
+ if (remount && !args->ar_upgrade)
+ goto cant_remount;
+ args->ar_upgrade = TRUE;
+
+ } else if (!strcmp(o, "num_glockd")) {
+ unsigned int x;
+ if (!v)
+ goto need_value;
+ sscanf(v, "%u", &x);
+ if (remount && x != args->ar_num_glockd)
+ goto cant_remount;
+ if (!x || x > GFS2_GLOCKD_MAX) {
+ fs_info(sdp, "0 < num_glockd <= %u (not %u)\n",
+ GFS2_GLOCKD_MAX, x);
+ error = -EINVAL;
+ break;
+ }
+ args->ar_num_glockd = x;
+ }
+
+ else if (!strcmp(o, "acl")) {
+ args->ar_posix_acl = TRUE;
+ sdp->sd_vfs->s_flags |= MS_POSIXACL;
+
+ } else if (!strcmp(o, "noacl")) {
+ args->ar_posix_acl = FALSE;
+ sdp->sd_vfs->s_flags &= ~MS_POSIXACL;
+
+ } else if (!strcmp(o, "quota")) {
+ if (!v)
+ goto need_value;
+ if (!strcmp(v, "off"))
+ args->ar_quota = GFS2_QUOTA_OFF;
+ else if (!strcmp(v, "account"))
+ args->ar_quota = GFS2_QUOTA_ACCOUNT;
+ else if (!strcmp(v, "on"))
+ args->ar_quota = GFS2_QUOTA_ON;
+ else {
+ fs_info(sdp, "invalid value for quota\n");
+ error = -EINVAL;
+ break;
+ }
+
+ } else if (!strcmp(o, "suiddir"))
+ args->ar_suiddir = TRUE;
+
+ else if (!strcmp(o, "nosuiddir"))
+ args->ar_suiddir = FALSE;
+
+ else if (!strcmp(o, "data")) {
+ if (!v)
+ goto need_value;
+ if (!strcmp(v, "writeback"))
+ args->ar_data = GFS2_DATA_WRITEBACK;
+ else if (!strcmp(v, "ordered"))
+ args->ar_data = GFS2_DATA_ORDERED;
+ else {
+ fs_info(sdp, "invalid value for data\n");
+ error = -EINVAL;
+ break;
+ }
+
+ } else {
+ fs_info(sdp, "unknown option: %s\n", o);
+ error = -EINVAL;
+ break;
+ }
+ }
+
+ if (error)
+ fs_info(sdp, "invalid mount option(s)\n");
+
+ if (data != data_arg)
+ kfree(data);
+
+ return error;
+
+ need_value:
+ fs_info(sdp, "need value for option %s\n", o);
+ return -EINVAL;
+
+ cant_remount:
+ fs_info(sdp, "can't remount with option %s\n", o);
+ return -EINVAL;
+}
+
--- a/fs/gfs2/mount.h 1970-01-01 07:30:00.000000000 +0730
+++ b/fs/gfs2/mount.h 2005-09-01 17:36:55.391103920 +0800
@@ -0,0 +1,15 @@
+/*
+ * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
+ * Copyright (C) 2004-2005 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.
+ */
+
+#ifndef __MOUNT_DOT_H__
+#define __MOUNT_DOT_H__
+
+int gfs2_mount_args(struct gfs2_sbd *sdp, char *data_arg, int remount);
+
+#endif /* __MOUNT_DOT_H__ */