diff options
Diffstat (limited to 'kernel/fs/squashfs/export.c')
| -rw-r--r-- | kernel/fs/squashfs/export.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/kernel/fs/squashfs/export.c b/kernel/fs/squashfs/export.c index 9c8cc2d..b59bfeb 100644 --- a/kernel/fs/squashfs/export.c +++ b/kernel/fs/squashfs/export.c @@ -21,6 +21,20 @@ * export.c */ +/* + * This file implements code to make Squashfs filesystems exportable (NFS etc.) + * + * The export code uses an inode lookup table to map inode numbers passed in + * filehandles to an inode location on disk. This table is stored compressed + * into metadata blocks. A second index table is used to locate these. This + * second index table for speed of access (and because it is small) is read at + * mount time and cached in memory. + * + * The inode lookup table is used only by the export code, inode disk + * locations are directly encoded in directories, enabling direct access + * without an intermediate lookup for all operations except the export ops. + */ + #include <linux/fs.h> #include <linux/vfs.h> #include <linux/dcache.h> @@ -92,8 +106,6 @@ static struct dentry *squashfs_get_parent(struct dentry *child) { struct inode *i = child->d_inode; - TRACE("Entered squashfs_get_parent\n"); - return squashfs_export_iget(i->i_sb, SQUASHFS_I(i)->parent_inode); } |