squashfs: add new extended inode types
Add new extended inode types that store the xattr_id field.
Also add the necessary code changes to make xattrs visibile.
Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
diff --git a/fs/squashfs/inode.c b/fs/squashfs/inode.c
index 49daaf6..2507011 100644
--- a/fs/squashfs/inode.c
+++ b/fs/squashfs/inode.c
@@ -40,6 +40,7 @@
#include <linux/fs.h>
#include <linux/vfs.h>
+#include <linux/xattr.h>
#include "squashfs_fs.h"
#include "squashfs_fs_sb.h"
@@ -111,6 +112,7 @@
int err, type, offset = SQUASHFS_INODE_OFFSET(ino);
union squashfs_inode squashfs_ino;
struct squashfs_base_inode *sqshb_ino = &squashfs_ino.base;
+ int xattr_id = SQUASHFS_INVALID_XATTR;
TRACE("Entered squashfs_read_inode\n");
@@ -199,8 +201,10 @@
frag_offset = 0;
}
+ xattr_id = le32_to_cpu(sqsh_ino->xattr);
inode->i_nlink = le32_to_cpu(sqsh_ino->nlink);
inode->i_size = le64_to_cpu(sqsh_ino->file_size);
+ inode->i_op = &squashfs_inode_ops;
inode->i_fop = &generic_ro_fops;
inode->i_mode |= S_IFREG;
inode->i_blocks = ((inode->i_size -
@@ -251,6 +255,7 @@
if (err < 0)
goto failed_read;
+ xattr_id = le32_to_cpu(sqsh_ino->xattr);
inode->i_nlink = le32_to_cpu(sqsh_ino->nlink);
inode->i_size = le32_to_cpu(sqsh_ino->file_size);
inode->i_op = &squashfs_dir_inode_ops;
@@ -280,21 +285,33 @@
inode->i_nlink = le32_to_cpu(sqsh_ino->nlink);
inode->i_size = le32_to_cpu(sqsh_ino->symlink_size);
- inode->i_op = &page_symlink_inode_operations;
+ inode->i_op = &squashfs_symlink_inode_ops;
inode->i_data.a_ops = &squashfs_symlink_aops;
inode->i_mode |= S_IFLNK;
squashfs_i(inode)->start = block;
squashfs_i(inode)->offset = offset;
+ if (type == SQUASHFS_LSYMLINK_TYPE) {
+ __le32 xattr;
+
+ err = squashfs_read_metadata(sb, NULL, &block,
+ &offset, inode->i_size);
+ if (err < 0)
+ goto failed_read;
+ err = squashfs_read_metadata(sb, &xattr, &block,
+ &offset, sizeof(xattr));
+ if (err < 0)
+ goto failed_read;
+ xattr_id = le32_to_cpu(xattr);
+ }
+
TRACE("Symbolic link inode %x:%x, start_block %llx, offset "
"%x\n", SQUASHFS_INODE_BLK(ino), offset,
block, offset);
break;
}
case SQUASHFS_BLKDEV_TYPE:
- case SQUASHFS_CHRDEV_TYPE:
- case SQUASHFS_LBLKDEV_TYPE:
- case SQUASHFS_LCHRDEV_TYPE: {
+ case SQUASHFS_CHRDEV_TYPE: {
struct squashfs_dev_inode *sqsh_ino = &squashfs_ino.dev;
unsigned int rdev;
@@ -315,10 +332,32 @@
SQUASHFS_INODE_BLK(ino), offset, rdev);
break;
}
+ case SQUASHFS_LBLKDEV_TYPE:
+ case SQUASHFS_LCHRDEV_TYPE: {
+ struct squashfs_ldev_inode *sqsh_ino = &squashfs_ino.ldev;
+ unsigned int rdev;
+
+ err = squashfs_read_metadata(sb, sqsh_ino, &block, &offset,
+ sizeof(*sqsh_ino));
+ if (err < 0)
+ goto failed_read;
+
+ if (type == SQUASHFS_LCHRDEV_TYPE)
+ inode->i_mode |= S_IFCHR;
+ else
+ inode->i_mode |= S_IFBLK;
+ xattr_id = le32_to_cpu(sqsh_ino->xattr);
+ inode->i_op = &squashfs_inode_ops;
+ inode->i_nlink = le32_to_cpu(sqsh_ino->nlink);
+ rdev = le32_to_cpu(sqsh_ino->rdev);
+ init_special_inode(inode, inode->i_mode, new_decode_dev(rdev));
+
+ TRACE("Device inode %x:%x, rdev %x\n",
+ SQUASHFS_INODE_BLK(ino), offset, rdev);
+ break;
+ }
case SQUASHFS_FIFO_TYPE:
- case SQUASHFS_SOCKET_TYPE:
- case SQUASHFS_LFIFO_TYPE:
- case SQUASHFS_LSOCKET_TYPE: {
+ case SQUASHFS_SOCKET_TYPE: {
struct squashfs_ipc_inode *sqsh_ino = &squashfs_ino.ipc;
err = squashfs_read_metadata(sb, sqsh_ino, &block, &offset,
@@ -334,14 +373,52 @@
init_special_inode(inode, inode->i_mode, 0);
break;
}
+ case SQUASHFS_LFIFO_TYPE:
+ case SQUASHFS_LSOCKET_TYPE: {
+ struct squashfs_lipc_inode *sqsh_ino = &squashfs_ino.lipc;
+
+ err = squashfs_read_metadata(sb, sqsh_ino, &block, &offset,
+ sizeof(*sqsh_ino));
+ if (err < 0)
+ goto failed_read;
+
+ if (type == SQUASHFS_LFIFO_TYPE)
+ inode->i_mode |= S_IFIFO;
+ else
+ inode->i_mode |= S_IFSOCK;
+ xattr_id = le32_to_cpu(sqsh_ino->xattr);
+ inode->i_op = &squashfs_inode_ops;
+ inode->i_nlink = le32_to_cpu(sqsh_ino->nlink);
+ init_special_inode(inode, inode->i_mode, 0);
+ break;
+ }
default:
ERROR("Unknown inode type %d in squashfs_iget!\n", type);
return -EINVAL;
}
+ if (xattr_id != SQUASHFS_INVALID_XATTR && msblk->xattr_id_table) {
+ err = squashfs_xattr_lookup(sb, xattr_id,
+ &squashfs_i(inode)->xattr_count,
+ &squashfs_i(inode)->xattr_size,
+ &squashfs_i(inode)->xattr);
+ if (err < 0)
+ goto failed_read;
+ inode->i_blocks += ((squashfs_i(inode)->xattr_size - 1) >> 9)
+ + 1;
+ } else
+ squashfs_i(inode)->xattr_count = 0;
+
return 0;
failed_read:
ERROR("Unable to read inode 0x%llx\n", ino);
return err;
}
+
+
+const struct inode_operations squashfs_inode_ops = {
+ .getxattr = generic_getxattr,
+ .listxattr = squashfs_listxattr
+};
+