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authorAlexey Dobriyan <adobriyan@gmail.com>2009-12-15 19:46:51 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2009-12-16 10:20:06 -0500
commitf3e2a520f5fb1a1df033efd9c2e5eadb384aad9b (patch)
treeda8272b8fc8aa7bb1d0d039bf0e13b4b9609a4b7 /fs/ufs
parent080497079c0bad05133fb8d1dee300bd9e6354ec (diff)
ufs: NFS support
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Acked-by: Evgeniy Dushistov <dushistov@mail.ru> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ufs')
-rw-r--r--fs/ufs/super.c52
1 files changed, 52 insertions, 0 deletions
diff --git a/fs/ufs/super.c b/fs/ufs/super.c
index 5faed7954d0a..143c20bfb04b 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -66,6 +66,7 @@
66 */ 66 */
67 67
68 68
69#include <linux/exportfs.h>
69#include <linux/module.h> 70#include <linux/module.h>
70#include <linux/bitops.h> 71#include <linux/bitops.h>
71 72
@@ -96,6 +97,56 @@
96#include "swab.h" 97#include "swab.h"
97#include "util.h" 98#include "util.h"
98 99
100static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation)
101{
102 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
103 struct inode *inode;
104
105 if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg)
106 return ERR_PTR(-ESTALE);
107
108 inode = ufs_iget(sb, ino);
109 if (IS_ERR(inode))
110 return ERR_CAST(inode);
111 if (generation && inode->i_generation != generation) {
112 iput(inode);
113 return ERR_PTR(-ESTALE);
114 }
115 return inode;
116}
117
118static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid,
119 int fh_len, int fh_type)
120{
121 return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
122}
123
124static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid,
125 int fh_len, int fh_type)
126{
127 return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
128}
129
130static struct dentry *ufs_get_parent(struct dentry *child)
131{
132 struct qstr dot_dot = {
133 .name = "..",
134 .len = 2,
135 };
136 ino_t ino;
137
138 ino = ufs_inode_by_name(child->d_inode, &dot_dot);
139 if (!ino)
140 return ERR_PTR(-ENOENT);
141 return d_obtain_alias(ufs_iget(child->d_inode->i_sb, ino));
142}
143
144static const struct export_operations ufs_export_ops = {
145 .fh_to_dentry = ufs_fh_to_dentry,
146 .fh_to_parent = ufs_fh_to_parent,
147 .get_parent = ufs_get_parent,
148};
149
99#ifdef CONFIG_UFS_DEBUG 150#ifdef CONFIG_UFS_DEBUG
100/* 151/*
101 * Print contents of ufs_super_block, useful for debugging 152 * Print contents of ufs_super_block, useful for debugging
@@ -990,6 +1041,7 @@ magic_found:
990 * Read ufs_super_block into internal data structures 1041 * Read ufs_super_block into internal data structures
991 */ 1042 */
992 sb->s_op = &ufs_super_ops; 1043 sb->s_op = &ufs_super_ops;
1044 sb->s_export_op = &ufs_export_ops;
993 sb->dq_op = NULL; /***/ 1045 sb->dq_op = NULL; /***/
994 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic); 1046 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
995 1047