Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

[firefly-linux-kernel-4.4.55.git] / fs / ext3 / super.c

diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 4ba2683c1d44f0181bc514c155c723c27012d635..1d6e2ed853229edfebb4de3a51fff8e86846e1ae 100644 (file)
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -916,21 +916,24 @@ static int set_qf_name(struct super_block *sb, int qtype, substring_t *args)
                        "Not enough memory for storing quotafile name");
                return 0;
        }
-       if (sbi->s_qf_names[qtype] &&
-               strcmp(sbi->s_qf_names[qtype], qname)) {
-               ext3_msg(sb, KERN_ERR,
-                       "%s quota file already specified", QTYPE2NAME(qtype));
+       if (sbi->s_qf_names[qtype]) {
+               int same = !strcmp(sbi->s_qf_names[qtype], qname);
+
                kfree(qname);
-               return 0;
+               if (!same) {
+                       ext3_msg(sb, KERN_ERR,
+                                "%s quota file already specified",
+                                QTYPE2NAME(qtype));
+               }
+               return same;
        }
-       sbi->s_qf_names[qtype] = qname;
-       if (strchr(sbi->s_qf_names[qtype], '/')) {
+       if (strchr(qname, '/')) {
                ext3_msg(sb, KERN_ERR,
                        "quotafile must be on filesystem root");
-               kfree(sbi->s_qf_names[qtype]);
-               sbi->s_qf_names[qtype] = NULL;
+               kfree(qname);
                return 0;
        }
+       sbi->s_qf_names[qtype] = qname;
        set_opt(sbi->s_mount_opt, QUOTA);
        return 1;
 }
@@ -945,11 +948,10 @@ static int clear_qf_name(struct super_block *sb, int qtype) {
                        " when quota turned on");
                return 0;
        }
-       /*
-        * The space will be released later when all options are confirmed
-        * to be correct
-        */
-       sbi->s_qf_names[qtype] = NULL;
+       if (sbi->s_qf_names[qtype]) {
+               kfree(sbi->s_qf_names[qtype]);
+               sbi->s_qf_names[qtype] = NULL;
+       }
        return 1;
 }
 #endif
@@ -2606,7 +2608,18 @@ static int ext3_remount (struct super_block * sb, int * flags, char * data)
 #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];
+               if (sbi->s_qf_names[i]) {
+                       old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i],
+                                                        GFP_KERNEL);
+                       if (!old_opts.s_qf_names[i]) {
+                               int j;
+
+                               for (j = 0; j < i; j++)
+                                       kfree(old_opts.s_qf_names[j]);
+                               return -ENOMEM;
+                       }
+               } else
+                       old_opts.s_qf_names[i] = NULL;
 #endif
 
        /*
@@ -2699,9 +2712,7 @@ static int ext3_remount (struct super_block * sb, int * flags, char * data)
 #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]);
+               kfree(old_opts.s_qf_names[i]);
 #endif
        if (enable_quota)
                dquot_resume(sb, -1);
@@ -2715,9 +2726,7 @@ restore_opts:
 #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]);
+               kfree(sbi->s_qf_names[i]);
                sbi->s_qf_names[i] = old_opts.s_qf_names[i];
        }
 #endif
@@ -3059,6 +3068,7 @@ static struct file_system_type ext3_fs_type = {
        .kill_sb        = kill_block_super,
        .fs_flags       = FS_REQUIRES_DEV,
 };
+MODULE_ALIAS_FS("ext3");
 
 static int __init init_ext3_fs(void)
 {