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authorLinus Torvalds <torvalds@linux-foundation.org>2011-07-25 22:50:35 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-07-25 22:50:35 -0700
commit91d44d99992ff2587104df5760bfffbb3564b3c2 (patch)
tree71316dfc11385f5594962f91d7192fdd851e86a8 /fs/squashfs
parent2dad3206db5c3832cde1f58650027fea3ff7adf3 (diff)
parentcc6d3497141adedb71de8ddce62bf4cd4817832d (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/pkl/squashfs-linus
* git://git.kernel.org/pub/scm/linux/kernel/git/pkl/squashfs-linus: Squashfs: Make ZLIB compression support optional Squashfs: Update documentation for XZ and add squashfs-tools devel tree
Diffstat (limited to 'fs/squashfs')
-rw-r--r--fs/squashfs/Kconfig14
-rw-r--r--fs/squashfs/Makefile3
-rw-r--r--fs/squashfs/decompressor.c6
-rw-r--r--fs/squashfs/decompressor.h4
-rw-r--r--fs/squashfs/squashfs.h3
5 files changed, 25 insertions, 5 deletions
diff --git a/fs/squashfs/Kconfig b/fs/squashfs/Kconfig
index 7797218d0b3..1360d4f88f4 100644
--- a/fs/squashfs/Kconfig
+++ b/fs/squashfs/Kconfig
@@ -1,7 +1,6 @@
config SQUASHFS
tristate "SquashFS 4.0 - Squashed file system support"
depends on BLOCK
- select ZLIB_INFLATE
help
Saying Y here includes support for SquashFS 4.0 (a Compressed
Read-Only File System). Squashfs is a highly compressed read-only
@@ -36,6 +35,19 @@ config SQUASHFS_XATTR
If unsure, say N.
+config SQUASHFS_ZLIB
+ bool "Include support for ZLIB compressed file systems"
+ depends on SQUASHFS
+ select ZLIB_INFLATE
+ default y
+ help
+ ZLIB compression is the standard compression used by Squashfs
+ file systems. It offers a good trade-off between compression
+ achieved and the amount of CPU time and memory necessary to
+ compress and decompress.
+
+ If unsure, say Y.
+
config SQUASHFS_LZO
bool "Include support for LZO compressed file systems"
depends on SQUASHFS
diff --git a/fs/squashfs/Makefile b/fs/squashfs/Makefile
index cecf2bea07a..110b0476f3b 100644
--- a/fs/squashfs/Makefile
+++ b/fs/squashfs/Makefile
@@ -4,7 +4,8 @@
obj-$(CONFIG_SQUASHFS) += squashfs.o
squashfs-y += block.o cache.o dir.o export.o file.o fragment.o id.o inode.o
-squashfs-y += namei.o super.o symlink.o zlib_wrapper.o decompressor.o
+squashfs-y += namei.o super.o symlink.o decompressor.o
squashfs-$(CONFIG_SQUASHFS_XATTR) += xattr.o xattr_id.o
squashfs-$(CONFIG_SQUASHFS_LZO) += lzo_wrapper.o
squashfs-$(CONFIG_SQUASHFS_XZ) += xz_wrapper.o
+squashfs-$(CONFIG_SQUASHFS_ZLIB) += zlib_wrapper.o
diff --git a/fs/squashfs/decompressor.c b/fs/squashfs/decompressor.c
index 9f1b0bb96f1..3f6271d86ab 100644
--- a/fs/squashfs/decompressor.c
+++ b/fs/squashfs/decompressor.c
@@ -52,6 +52,12 @@ static const struct squashfs_decompressor squashfs_xz_comp_ops = {
};
#endif
+#ifndef CONFIG_SQUASHFS_ZLIB
+static const struct squashfs_decompressor squashfs_zlib_comp_ops = {
+ NULL, NULL, NULL, ZLIB_COMPRESSION, "zlib", 0
+};
+#endif
+
static const struct squashfs_decompressor squashfs_unknown_comp_ops = {
NULL, NULL, NULL, 0, "unknown", 0
};
diff --git a/fs/squashfs/decompressor.h b/fs/squashfs/decompressor.h
index 8ba70cff09a..330073e2902 100644
--- a/fs/squashfs/decompressor.h
+++ b/fs/squashfs/decompressor.h
@@ -56,4 +56,8 @@ extern const struct squashfs_decompressor squashfs_xz_comp_ops;
extern const struct squashfs_decompressor squashfs_lzo_comp_ops;
#endif
+#ifdef CONFIG_SQUASHFS_ZLIB
+extern const struct squashfs_decompressor squashfs_zlib_comp_ops;
+#endif
+
#endif
diff --git a/fs/squashfs/squashfs.h b/fs/squashfs/squashfs.h
index e3be6a71cfa..d1266516ed0 100644
--- a/fs/squashfs/squashfs.h
+++ b/fs/squashfs/squashfs.h
@@ -97,6 +97,3 @@ extern const struct inode_operations squashfs_symlink_inode_ops;
/* xattr.c */
extern const struct xattr_handler *squashfs_xattr_handlers[];
-
-/* zlib_wrapper.c */
-extern const struct squashfs_decompressor squashfs_zlib_comp_ops;