1 files changed, 108 insertions, 35 deletions

diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index 0ec3ec672de1..50aac606b990 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -21,6 +21,8 @@
 #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"
@@ -70,6 +72,11 @@ enum {
         Opt_commit,
         Opt_err_withdraw,
         Opt_err_panic,
+        Opt_statfs_quantum,
+        Opt_statfs_percent,
+        Opt_quota_quantum,
+        Opt_barrier,
+        Opt_nobarrier,
         Opt_error,
 };
 
@@ -101,18 +108,23 @@ static const match_table_t tokens = {
         {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_mount_args - Parse mount options
- * @sdp:
- * @data:
+ * @args: The structure into which the parsed options will be written
+ * @options: The options to parse
  *
  * Return: errno
  */
 
-int gfs2_mount_args(struct gfs2_sbd *sdp, struct gfs2_args *args, char *options)
+int gfs2_mount_args(struct gfs2_args *args, char *options)
 {
         char *o;
         int token;
@@ -157,7 +169,7 @@ int gfs2_mount_args(struct gfs2_sbd *sdp, struct gfs2_args *args, char *options)
                         break;
                 case Opt_debug:
                         if (args->ar_errors == GFS2_ERRORS_PANIC) {
-                                fs_info(sdp, "-o debug and -o errors=panic "
+                                printk(KERN_WARNING "GFS2: -o debug and -o errors=panic "
                                        "are mutually exclusive.\n");
                                 return -EINVAL;
                         }
@@ -210,7 +222,29 @@ int gfs2_mount_args(struct gfs2_sbd *sdp, struct gfs2_args *args, char *options)
                 case Opt_commit:
                         rv = match_int(&tmp[0], &args->ar_commit);
                         if (rv || args->ar_commit <= 0) {
-                                fs_info(sdp, "commit mount option requires a positive numeric argument\n");
+                                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;
@@ -219,15 +253,21 @@ int gfs2_mount_args(struct gfs2_sbd *sdp, struct gfs2_args *args, char *options)
                         break;
                 case Opt_err_panic:
                         if (args->ar_debug) {
-                                fs_info(sdp, "-o debug and -o errors=panic "
+                                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:
-                        fs_info(sdp, "invalid mount option: %s\n", o);
+                        printk(KERN_WARNING "GFS2: invalid mount option: %s\n", o);
                         return -EINVAL;
                 }
         }
@@ -442,7 +482,10 @@ void gfs2_statfs_change(struct gfs2_sbd *sdp, s64 total, s64 free,
 {
         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);
@@ -456,9 +499,17 @@ void gfs2_statfs_change(struct gfs2_sbd *sdp, s64 total, s64 free,
         l_sc->sc_free += free;
         l_sc->sc_dinodes += dinodes;
         gfs2_statfs_change_out(l_sc, l_bh->b_data + sizeof(struct gfs2_dinode));
+        if (sdp->sd_args.ar_statfs_percent) {
+                x = 100 * l_sc->sc_free;
+                y = m_sc->sc_free * sdp->sd_args.ar_statfs_percent;
+                if (x >= y || x <= -y)
+                        need_sync = 1;
+        }
         spin_unlock(&sdp->sd_statfs_spin);
 
         brelse(l_bh);
+        if (need_sync)
+                gfs2_wake_up_statfs(sdp);
 }
 
 void update_statfs(struct gfs2_sbd *sdp, struct buffer_head *m_bh,
@@ -484,8 +535,9 @@ void update_statfs(struct gfs2_sbd *sdp, struct buffer_head *m_bh,
         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_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;
@@ -521,6 +573,7 @@ int gfs2_statfs_sync(struct gfs2_sbd *sdp)
                 goto out_bh2;
 
         update_statfs(sdp, m_bh, l_bh);
+        sdp->sd_statfs_force_sync = 0;
 
         gfs2_trans_end(sdp);
 
@@ -659,7 +712,7 @@ void gfs2_unfreeze_fs(struct gfs2_sbd *sdp)
  * Returns: errno
  */
 
-static int gfs2_write_inode(struct inode *inode, int sync)
+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);
@@ -670,8 +723,7 @@ static int gfs2_write_inode(struct inode *inode, int sync)
         int ret = 0;
 
         /* Check this is a "normal" inode, etc */
-        if (!test_bit(GIF_USER, &ip->i_flags) ||
-            (current->flags & PF_MEMALLOC))
+        if (current->flags & PF_MEMALLOC)
                 return 0;
         ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
         if (ret)
@@ -694,7 +746,7 @@ static int gfs2_write_inode(struct inode *inode, int sync)
 do_unlock:
         gfs2_glock_dq_uninit(&gh);
 do_flush:
-        if (sync != 0)
+        if (wbc->sync_mode == WB_SYNC_ALL)
                 gfs2_log_flush(GFS2_SB(inode), ip->i_gl);
         return ret;
 }
@@ -712,8 +764,8 @@ static int gfs2_make_fs_ro(struct gfs2_sbd *sdp)
         int error;
 
         flush_workqueue(gfs2_delete_workqueue);
-        gfs2_quota_sync(sdp);
-        gfs2_statfs_sync(sdp);
+        gfs2_quota_sync(sdp->sd_vfs, 0, 1);
+        gfs2_statfs_sync(sdp->sd_vfs, 0);
 
         error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, GL_NOCACHE,
                                    &t_gh);
@@ -808,6 +860,7 @@ restart:
         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);
@@ -1061,8 +1114,13 @@ static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data)
 
         spin_lock(&gt->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->gt_spin);
-        error = gfs2_mount_args(sdp, &args, data);
+        error = gfs2_mount_args(&args, data);
         if (error)
                 return error;
 
@@ -1097,8 +1155,21 @@ static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data)
                 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->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;
+        }
+        else {
+                gt->gt_statfs_slow = 1;
+                gt->gt_statfs_quantum = 30;
+        }
         spin_unlock(&gt->gt_spin);
 
         gfs2_online_uevent(sdp);
@@ -1124,7 +1195,7 @@ static void gfs2_drop_inode(struct inode *inode)
 {
         struct gfs2_inode *ip = GFS2_I(inode);
 
-        if (test_bit(GIF_USER, &ip->i_flags) && inode->i_nlink) {
+        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);
@@ -1142,18 +1213,12 @@ static void gfs2_clear_inode(struct inode *inode)
 {
         struct gfs2_inode *ip = GFS2_I(inode);
 
-        /* This tells us its a "real" inode and not one which only
-         * serves to contain an address space (see rgrp.c, meta_io.c)
-         * which therefore doesn't have its own glocks.
-         */
-        if (test_bit(GIF_USER, &ip->i_flags)) {
-                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);
-                }
+        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);
         }
 }
 
@@ -1179,7 +1244,7 @@ static int gfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
 {
         struct gfs2_sbd *sdp = mnt->mnt_sb->s_fs_info;
         struct gfs2_args *args = &sdp->sd_args;
-        int lfsecs;
+        int val;
 
         if (is_ancestor(mnt->mnt_root, sdp->sd_master_dir))
                 seq_printf(s, ",meta");
@@ -1240,9 +1305,17 @@ static int gfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
         }
         if (args->ar_discard)
                 seq_printf(s, ",discard");
-        lfsecs = sdp->sd_tune.gt_log_flush_secs;
-        if (lfsecs != 60)
-                seq_printf(s, ",commit=%d", lfsecs);
+        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;
 
@@ -1259,6 +1332,9 @@ static int gfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
                 }
                 seq_printf(s, ",errors=%s", state);
         }
+        if (test_bit(SDF_NOBARRIERS, &sdp->sd_flags))
+                seq_printf(s, ",nobarrier");
+
         return 0;
 }
 
@@ -1277,9 +1353,6 @@ static void gfs2_delete_inode(struct inode *inode)
         struct gfs2_holder gh;
         int error;
 
-        if (!test_bit(GIF_USER, &ip->i_flags))
-                goto out;
-
         error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
         if (unlikely(error)) {
                 gfs2_glock_dq_uninit(&ip->i_iopen_gh);