1 files changed, 89 insertions, 21 deletions

diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 9630fbfdc24a..3c3c6e399fb3 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -589,7 +589,7 @@ enum {
         Opt_commit, Opt_journal_update, Opt_journal_inum,
         Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback,
         Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota,
-        Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0,
+        Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota,
         Opt_ignore, Opt_barrier, Opt_err, Opt_resize,
 };
 
@@ -634,10 +634,10 @@ static match_table_t tokens = {
         {Opt_grpjquota, "grpjquota=%s"},
         {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
         {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
-        {Opt_ignore, "grpquota"},
-        {Opt_ignore, "noquota"},
-        {Opt_ignore, "quota"},
-        {Opt_ignore, "usrquota"},
+        {Opt_quota, "grpquota"},
+        {Opt_noquota, "noquota"},
+        {Opt_quota, "quota"},
+        {Opt_quota, "usrquota"},
         {Opt_barrier, "barrier=%u"},
         {Opt_err, NULL},
         {Opt_resize, "resize"},
@@ -876,6 +876,7 @@ set_qf_name:
                                 sbi->s_qf_names[qtype] = NULL;
                                 return 0;
                         }
+                        set_opt(sbi->s_mount_opt, QUOTA);
                         break;
                 case Opt_offusrjquota:
                         qtype = USRQUOTA;
@@ -889,7 +890,10 @@ clear_qf_name:
                                         "quota turned on.\n");
                                 return 0;
                         }
-                        kfree(sbi->s_qf_names[qtype]);
+                        /*
+                         * The space will be released later when all options
+                         * are confirmed to be correct
+                         */
                         sbi->s_qf_names[qtype] = NULL;
                         break;
                 case Opt_jqfmt_vfsold:
@@ -898,6 +902,17 @@ clear_qf_name:
                 case Opt_jqfmt_vfsv0:
                         sbi->s_jquota_fmt = QFMT_VFS_V0;
                         break;
+                case Opt_quota:
+                        set_opt(sbi->s_mount_opt, QUOTA);
+                        break;
+                case Opt_noquota:
+                        if (sb_any_quota_enabled(sb)) {
+                                printk(KERN_ERR "EXT3-fs: Cannot change quota "
+                                        "options when quota turned on.\n");
+                                return 0;
+                        }
+                        clear_opt(sbi->s_mount_opt, QUOTA);
+                        break;
 #else
                 case Opt_usrjquota:
                 case Opt_grpjquota:
@@ -909,6 +924,9 @@ clear_qf_name:
                                 "EXT3-fs: journalled quota options not "
                                 "supported.\n");
                         break;
+                case Opt_quota:
+                case Opt_noquota:
+                        break;
 #endif
                 case Opt_abort:
                         set_opt(sbi->s_mount_opt, ABORT);
@@ -924,12 +942,13 @@ clear_qf_name:
                 case Opt_ignore:
                         break;
                 case Opt_resize:
-                        if (!n_blocks_count) {
+                        if (!is_remount) {
                                 printk("EXT3-fs: resize option only available "
                                         "for remount\n");
                                 return 0;
                         }
-                        match_int(&args[0], &option);
+                        if (match_int(&args[0], &option) != 0)
+                                return 0;
                         *n_blocks_count = option;
                         break;
                 case Opt_nobh:
@@ -2093,14 +2112,33 @@ static int ext3_remount (struct super_block * sb, int * flags, char * data)
 {
         struct ext3_super_block * es;
         struct ext3_sb_info *sbi = EXT3_SB(sb);
-        unsigned long tmp;
         unsigned long n_blocks_count = 0;
+        unsigned long old_sb_flags;
+        struct ext3_mount_options old_opts;
+        int err;
+#ifdef CONFIG_QUOTA
+        int i;
+#endif
+
+        /* Store the original options */
+        old_sb_flags = sb->s_flags;
+        old_opts.s_mount_opt = sbi->s_mount_opt;
+        old_opts.s_resuid = sbi->s_resuid;
+        old_opts.s_resgid = sbi->s_resgid;
+        old_opts.s_commit_interval = sbi->s_commit_interval;
+#ifdef CONFIG_QUOTA
+        old_opts.s_jquota_fmt = sbi->s_jquota_fmt;
+        for (i = 0; i < MAXQUOTAS; i++)
+                old_opts.s_qf_names[i] = sbi->s_qf_names[i];
+#endif
 
         /*
          * Allow the "check" option to be passed as a remount option.
          */
-        if (!parse_options(data, sb, &tmp, &n_blocks_count, 1))
-                return -EINVAL;
+        if (!parse_options(data, sb, NULL, &n_blocks_count, 1)) {
+                err = -EINVAL;
+                goto restore_opts;
+        }
 
         if (sbi->s_mount_opt & EXT3_MOUNT_ABORT)
                 ext3_abort(sb, __FUNCTION__, "Abort forced by user");
@@ -2114,8 +2152,10 @@ static int ext3_remount (struct super_block * sb, int * flags, char * data)
 
         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) ||
                 n_blocks_count > le32_to_cpu(es->s_blocks_count)) {
-                if (sbi->s_mount_opt & EXT3_MOUNT_ABORT)
-                        return -EROFS;
+                if (sbi->s_mount_opt & EXT3_MOUNT_ABORT) {
+                        err = -EROFS;
+                        goto restore_opts;
+                }
 
                 if (*flags & MS_RDONLY) {
                         /*
@@ -2142,7 +2182,8 @@ static int ext3_remount (struct super_block * sb, int * flags, char * data)
                                        "remount RDWR because of unsupported "
                                        "optional features (%x).\n",
                                        sb->s_id, le32_to_cpu(ret));
-                                return -EROFS;
+                                err = -EROFS;
+                                goto restore_opts;
                         }
                         /*
                          * Mounting a RDONLY partition read-write, so reread
@@ -2152,13 +2193,38 @@ static int ext3_remount (struct super_block * sb, int * flags, char * data)
                          */
                         ext3_clear_journal_err(sb, es);
                         sbi->s_mount_state = le16_to_cpu(es->s_state);
-                        if ((ret = ext3_group_extend(sb, es, n_blocks_count)))
-                                return ret;
+                        if ((ret = ext3_group_extend(sb, es, n_blocks_count))) {
+                                err = ret;
+                                goto restore_opts;
+                        }
                         if (!ext3_setup_super (sb, es, 0))
                                 sb->s_flags &= ~MS_RDONLY;
                 }
         }
+#ifdef CONFIG_QUOTA
+        /* Release old quota file names */
+        for (i = 0; i < MAXQUOTAS; i++)
+                if (old_opts.s_qf_names[i] &&
+                    old_opts.s_qf_names[i] != sbi->s_qf_names[i])
+                        kfree(old_opts.s_qf_names[i]);
+#endif
         return 0;
+restore_opts:
+        sb->s_flags = old_sb_flags;
+        sbi->s_mount_opt = old_opts.s_mount_opt;
+        sbi->s_resuid = old_opts.s_resuid;
+        sbi->s_resgid = old_opts.s_resgid;
+        sbi->s_commit_interval = old_opts.s_commit_interval;
+#ifdef CONFIG_QUOTA
+        sbi->s_jquota_fmt = old_opts.s_jquota_fmt;
+        for (i = 0; i < MAXQUOTAS; i++) {
+                if (sbi->s_qf_names[i] &&
+                    old_opts.s_qf_names[i] != sbi->s_qf_names[i])
+                        kfree(sbi->s_qf_names[i]);
+                sbi->s_qf_names[i] = old_opts.s_qf_names[i];
+        }
+#endif
+        return err;
 }
 
 static int ext3_statfs (struct super_block * sb, struct kstatfs * buf)
@@ -2238,7 +2304,7 @@ static int ext3_dquot_initialize(struct inode *inode, int type)
         int ret, err;
 
         /* We may create quota structure so we need to reserve enough blocks */
-        handle = ext3_journal_start(inode, 2*EXT3_QUOTA_INIT_BLOCKS);
+        handle = ext3_journal_start(inode, 2*EXT3_QUOTA_INIT_BLOCKS(inode->i_sb));
         if (IS_ERR(handle))
                 return PTR_ERR(handle);
         ret = dquot_initialize(inode, type);
@@ -2254,7 +2320,7 @@ static int ext3_dquot_drop(struct inode *inode)
         int ret, err;
 
         /* We may delete quota structure so we need to reserve enough blocks */
-        handle = ext3_journal_start(inode, 2*EXT3_QUOTA_INIT_BLOCKS);
+        handle = ext3_journal_start(inode, 2*EXT3_QUOTA_DEL_BLOCKS(inode->i_sb));
         if (IS_ERR(handle))
                 return PTR_ERR(handle);
         ret = dquot_drop(inode);
@@ -2272,7 +2338,7 @@ static int ext3_write_dquot(struct dquot *dquot)
 
         inode = dquot_to_inode(dquot);
         handle = ext3_journal_start(inode,
-                                        EXT3_QUOTA_TRANS_BLOCKS);
+                                        EXT3_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
         if (IS_ERR(handle))
                 return PTR_ERR(handle);
         ret = dquot_commit(dquot);
@@ -2288,7 +2354,7 @@ static int ext3_acquire_dquot(struct dquot *dquot)
         handle_t *handle;
 
         handle = ext3_journal_start(dquot_to_inode(dquot),
-                                        EXT3_QUOTA_INIT_BLOCKS);
+                                        EXT3_QUOTA_INIT_BLOCKS(dquot->dq_sb));
         if (IS_ERR(handle))
                 return PTR_ERR(handle);
         ret = dquot_acquire(dquot);
@@ -2304,7 +2370,7 @@ static int ext3_release_dquot(struct dquot *dquot)
         handle_t *handle;
 
         handle = ext3_journal_start(dquot_to_inode(dquot),
-                                        EXT3_QUOTA_INIT_BLOCKS);
+                                        EXT3_QUOTA_DEL_BLOCKS(dquot->dq_sb));
         if (IS_ERR(handle))
                 return PTR_ERR(handle);
         ret = dquot_release(dquot);
@@ -2361,6 +2427,8 @@ static int ext3_quota_on(struct super_block *sb, int type, int format_id,
         int err;
         struct nameidata nd;
 
+        if (!test_opt(sb, QUOTA))
+                return -EINVAL;
         /* Not journalling quota? */
         if (!EXT3_SB(sb)->s_qf_names[USRQUOTA] &&
             !EXT3_SB(sb)->s_qf_names[GRPQUOTA])