diff options
Diffstat (limited to 'fs/cramfs')
| -rw-r--r-- | fs/cramfs/Kconfig | 5 | ||||
| -rw-r--r-- | fs/cramfs/inode.c | 54 | ||||
| -rw-r--r-- | fs/cramfs/internal.h | 4 | ||||
| -rw-r--r-- | fs/cramfs/uncompress.c | 2 |
4 files changed, 42 insertions, 23 deletions
diff --git a/fs/cramfs/Kconfig b/fs/cramfs/Kconfig index cd06466f365..11b29d491b7 100644 --- a/fs/cramfs/Kconfig +++ b/fs/cramfs/Kconfig @@ -1,5 +1,5 @@ config CRAMFS - tristate "Compressed ROM file system support (cramfs)" + tristate "Compressed ROM file system support (cramfs) (OBSOLETE)" depends on BLOCK select ZLIB_INFLATE help @@ -16,4 +16,7 @@ config CRAMFS cramfs. Note that the root file system (the one containing the directory /) cannot be compiled as a module. + This filesystem is obsoleted by SquashFS, which is much better + in terms of performance and features. + If unsure, say N. diff --git a/fs/cramfs/inode.c b/fs/cramfs/inode.c index e501ac3a49f..ddcfe590b8a 100644 --- a/fs/cramfs/inode.c +++ b/fs/cramfs/inode.c @@ -17,14 +17,30 @@ #include <linux/init.h> #include <linux/string.h> #include <linux/blkdev.h> -#include <linux/cramfs_fs.h> #include <linux/slab.h> -#include <linux/cramfs_fs_sb.h> #include <linux/vfs.h> #include <linux/mutex.h> - +#include <uapi/linux/cramfs_fs.h> #include <asm/uaccess.h> +#include "internal.h" + +/* + * cramfs super-block data in memory + */ +struct cramfs_sb_info { + unsigned long magic; + unsigned long size; + unsigned long blocks; + unsigned long files; + unsigned long flags; +}; + +static inline struct cramfs_sb_info *CRAMFS_SB(struct super_block *sb) +{ + return sb->s_fs_info; +} + static const struct super_operations cramfs_ops; static const struct inode_operations cramfs_dir_inode_operations; static const struct file_operations cramfs_directory_operations; @@ -179,8 +195,7 @@ static void *cramfs_read(struct super_block *sb, unsigned int offset, unsigned i struct page *page = NULL; if (blocknr + i < devsize) { - page = read_mapping_page_async(mapping, blocknr + i, - NULL); + page = read_mapping_page(mapping, blocknr + i, NULL); /* synchronous error? */ if (IS_ERR(page)) page = NULL; @@ -219,14 +234,16 @@ static void *cramfs_read(struct super_block *sb, unsigned int offset, unsigned i return read_buffers[buffer] + offset; } -static void cramfs_put_super(struct super_block *sb) +static void cramfs_kill_sb(struct super_block *sb) { - kfree(sb->s_fs_info); - sb->s_fs_info = NULL; + struct cramfs_sb_info *sbi = CRAMFS_SB(sb); + kill_block_super(sb); + kfree(sbi); } static int cramfs_remount(struct super_block *sb, int *flags, char *data) { + sync_filesystem(sb); *flags |= MS_RDONLY; return 0; } @@ -261,7 +278,7 @@ static int cramfs_fill_super(struct super_block *sb, void *data, int silent) if (super.magic == CRAMFS_MAGIC_WEND) { if (!silent) printk(KERN_ERR "cramfs: wrong endianness\n"); - goto out; + return -EINVAL; } /* check at 512 byte offset */ @@ -273,20 +290,20 @@ static int cramfs_fill_super(struct super_block *sb, void *data, int silent) printk(KERN_ERR "cramfs: wrong endianness\n"); else if (!silent) printk(KERN_ERR "cramfs: wrong magic\n"); - goto out; + return -EINVAL; } } /* get feature flags first */ if (super.flags & ~CRAMFS_SUPPORTED_FLAGS) { printk(KERN_ERR "cramfs: unsupported filesystem features\n"); - goto out; + return -EINVAL; } /* Check that the root inode is in a sane state */ if (!S_ISDIR(super.root.mode)) { printk(KERN_ERR "cramfs: root is not a directory\n"); - goto out; + return -EINVAL; } /* correct strange, hard-coded permissions of mkcramfs */ super.root.mode |= (S_IRUSR | S_IXUSR | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); @@ -310,22 +327,18 @@ static int cramfs_fill_super(struct super_block *sb, void *data, int silent) (root_offset != 512 + sizeof(struct cramfs_super)))) { printk(KERN_ERR "cramfs: bad root offset %lu\n", root_offset); - goto out; + return -EINVAL; } /* Set it all up.. */ sb->s_op = &cramfs_ops; root = get_cramfs_inode(sb, &super.root, 0); if (IS_ERR(root)) - goto out; + return PTR_ERR(root); sb->s_root = d_make_root(root); if (!sb->s_root) - goto out; + return -ENOMEM; return 0; -out: - kfree(sbi); - sb->s_fs_info = NULL; - return -EINVAL; } static int cramfs_statfs(struct dentry *dentry, struct kstatfs *buf) @@ -550,7 +563,6 @@ static const struct inode_operations cramfs_dir_inode_operations = { }; static const struct super_operations cramfs_ops = { - .put_super = cramfs_put_super, .remount_fs = cramfs_remount, .statfs = cramfs_statfs, }; @@ -565,7 +577,7 @@ static struct file_system_type cramfs_fs_type = { .owner = THIS_MODULE, .name = "cramfs", .mount = cramfs_mount, - .kill_sb = kill_block_super, + .kill_sb = cramfs_kill_sb, .fs_flags = FS_REQUIRES_DEV, }; MODULE_ALIAS_FS("cramfs"); diff --git a/fs/cramfs/internal.h b/fs/cramfs/internal.h new file mode 100644 index 00000000000..349d7127215 --- /dev/null +++ b/fs/cramfs/internal.h @@ -0,0 +1,4 @@ +/* Uncompression interfaces to the underlying zlib */ +int cramfs_uncompress_block(void *dst, int dstlen, void *src, int srclen); +int cramfs_uncompress_init(void); +void cramfs_uncompress_exit(void); diff --git a/fs/cramfs/uncompress.c b/fs/cramfs/uncompress.c index 023329800d2..1760c1b84d9 100644 --- a/fs/cramfs/uncompress.c +++ b/fs/cramfs/uncompress.c @@ -19,7 +19,7 @@ #include <linux/errno.h> #include <linux/vmalloc.h> #include <linux/zlib.h> -#include <linux/cramfs_fs.h> +#include "internal.h" static z_stream stream; static int initialized; |