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authorAndres Salomon <dilinger@queued.net>2011-10-16 18:15:23 -0700
committerArtem Bityutskiy <artem.bityutskiy@intel.com>2011-10-19 17:22:21 +0300
commit123005f3ccfa58637ad6e1a8b9f7f3f861ca65f4 (patch)
treea9bd8a539d9c950f47514a5f94f65c25c09e3b6c /fs/jffs2/super.c
parent92abc475d8de1c29373f6d96ed63d8ecaa199d25 (diff)
jffs2: add compr=lzo and compr=zlib options
..to allow forcing of either compression scheme. This will override compiled-in defaults. jffs2_compress is reworked a bit, as the lzo/zlib override shares lots of code w/ the PRIORITY mode. v2: update show_options accordingly. Signed-off-by: Andres Salomon <dilinger@queued.net> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@intel.com>
Diffstat (limited to 'fs/jffs2/super.c')
-rw-r--r--fs/jffs2/super.c26
1 files changed, 24 insertions, 2 deletions
diff --git a/fs/jffs2/super.c b/fs/jffs2/super.c
index 40f6e6385fd1..e7e974454115 100644
--- a/fs/jffs2/super.c
+++ b/fs/jffs2/super.c
@@ -82,6 +82,14 @@ static const char *jffs2_compr_name(unsigned int compr)
switch (compr) {
case JFFS2_COMPR_MODE_NONE:
return "none";
+#ifdef CONFIG_JFFS2_LZO
+ case JFFS2_COMPR_MODE_FORCELZO:
+ return "lzo";
+#endif
+#ifdef CONFIG_JFFS2_ZLIB
+ case JFFS2_COMPR_MODE_FORCEZLIB:
+ return "zlib";
+#endif
default:
/* should never happen; programmer error */
WARN_ON(1);
@@ -195,11 +203,25 @@ static int jffs2_parse_options(struct jffs2_sb_info *c, char *data)
if (!name)
return -ENOMEM;
- if (!strcmp(name, "none")) {
+ if (!strcmp(name, "none"))
c->mount_opts.compr = JFFS2_COMPR_MODE_NONE;
- c->mount_opts.override_compr = true;
+#ifdef CONFIG_JFFS2_LZO
+ else if (!strcmp(name, "lzo"))
+ c->mount_opts.compr = JFFS2_COMPR_MODE_FORCELZO;
+#endif
+#ifdef CONFIG_JFFS2_ZLIB
+ else if (!strcmp(name, "zlib"))
+ c->mount_opts.compr =
+ JFFS2_COMPR_MODE_FORCEZLIB;
+#endif
+ else {
+ printk(KERN_ERR "JFFS2 Error: unknown compressor \"%s\"",
+ name);
+ kfree(name);
+ return -EINVAL;
}
kfree(name);
+ c->mount_opts.override_compr = true;
break;
default:
printk(KERN_ERR "JFFS2 Error: unrecognized mount option '%s' or missing value\n",