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-rw-r--r--fs/ntfs/namei.c31
1 files changed, 29 insertions, 2 deletions
diff --git a/fs/ntfs/namei.c b/fs/ntfs/namei.c
index 7c7e13b43b2e..d261e25bd9ba 100644
--- a/fs/ntfs/namei.c
+++ b/fs/ntfs/namei.c
@@ -380,7 +380,7 @@ struct inode_operations ntfs_dir_inode_ops = {
380 * Return the dentry of the parent directory on success or the error code on 380 * Return the dentry of the parent directory on success or the error code on
381 * error (IS_ERR() is true). 381 * error (IS_ERR() is true).
382 */ 382 */
383struct dentry *ntfs_get_parent(struct dentry *child_dent) 383static struct dentry *ntfs_get_parent(struct dentry *child_dent)
384{ 384{
385 struct inode *vi = child_dent->d_inode; 385 struct inode *vi = child_dent->d_inode;
386 ntfs_inode *ni = NTFS_I(vi); 386 ntfs_inode *ni = NTFS_I(vi);
@@ -465,7 +465,7 @@ try_next:
465 * 465 *
466 * Return the dentry on success or the error code on error (IS_ERR() is true). 466 * Return the dentry on success or the error code on error (IS_ERR() is true).
467 */ 467 */
468struct dentry *ntfs_get_dentry(struct super_block *sb, void *fh) 468static struct dentry *ntfs_get_dentry(struct super_block *sb, void *fh)
469{ 469{
470 struct inode *vi; 470 struct inode *vi;
471 struct dentry *dent; 471 struct dentry *dent;
@@ -496,3 +496,30 @@ struct dentry *ntfs_get_dentry(struct super_block *sb, void *fh)
496 ntfs_debug("Done for inode 0x%lx, generation 0x%x.", ino, gen); 496 ntfs_debug("Done for inode 0x%lx, generation 0x%x.", ino, gen);
497 return dent; 497 return dent;
498} 498}
499
500/**
501 * Export operations allowing NFS exporting of mounted NTFS partitions.
502 *
503 * We use the default ->decode_fh() and ->encode_fh() for now. Note that they
504 * use 32 bits to store the inode number which is an unsigned long so on 64-bit
505 * architectures is usually 64 bits so it would all fail horribly on huge
506 * volumes. I guess we need to define our own encode and decode fh functions
507 * that store 64-bit inode numbers at some point but for now we will ignore the
508 * problem...
509 *
510 * We also use the default ->get_name() helper (used by ->decode_fh() via
511 * fs/exportfs/expfs.c::find_exported_dentry()) as that is completely fs
512 * independent.
513 *
514 * The default ->get_parent() just returns -EACCES so we have to provide our
515 * own and the default ->get_dentry() is incompatible with NTFS due to not
516 * allowing the inode number 0 which is used in NTFS for the system file $MFT
517 * and due to using iget() whereas NTFS needs ntfs_iget().
518 */
519struct export_operations ntfs_export_ops = {
520 .get_parent = ntfs_get_parent, /* Find the parent of a given
521 directory. */
522 .get_dentry = ntfs_get_dentry, /* Find a dentry for the inode
523 given a file handle
524 sub-fragment. */
525};