Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f43bf0bebed7c33b698a8a25f95812f9e87c3843
Commit: f43bf0bebed7c33b698a8a25f95812f9e87c3843
Parent: 2a3f5fd45938bd86ce8faf4cb26be4f7e9ae2941
Author: Trond Myklebust <[EMAIL PROTECTED]>
AuthorDate: Tue Oct 9 12:01:04 2007 -0400
Committer: Trond Myklebust <[EMAIL PROTECTED]>
CommitDate: Tue Oct 9 17:20:52 2007 -0400
NFS: Add a boot parameter to disable 64 bit inode numbers
This boot parameter will allow legacy 32-bit applications which call stat()
to continue to function even if the NFSv3/v4 server uses 64-bit inode
numbers.
Signed-off-by: Trond Myklebust <[EMAIL PROTECTED]>
---
Documentation/kernel-parameters.txt | 7 +++++++
fs/nfs/dir.c | 3 ++-
fs/nfs/inode.c | 27 ++++++++++++++++++++++++++-
include/linux/nfs_fs.h | 1 +
4 files changed, 36 insertions(+), 2 deletions(-)
diff --git a/Documentation/kernel-parameters.txt
b/Documentation/kernel-parameters.txt
index 4d175c7..83e2104 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1073,6 +1073,13 @@ and is between 256 and 4096 characters. It is defined in
the file
[NFS] set the maximum lifetime for idmapper cache
entries.
+ nfs.enable_ino64=
+ [NFS] enable 64-bit inode numbers.
+ If zero, the NFS client will fake up a 32-bit inode
+ number for the readdir() and stat() syscalls instead
+ of returning the full 64-bit number.
+ The default is to return 64-bit inode numbers.
+
nmi_watchdog= [KNL,BUGS=X86-32] Debugging features for SMP kernels
no387 [BUGS=X86-32] Tells the kernel to use the 387 maths
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index a4fdc4c..8ec7fbd 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -427,7 +427,8 @@ int nfs_do_filldir(nfs_readdir_descriptor_t *desc, void
*dirent,
}
res = filldir(dirent, entry->name, entry->len,
- file->f_pos, fileid, d_type);
+ file->f_pos, nfs_compat_user_ino64(fileid),
+ d_type);
if (res < 0)
break;
file->f_pos++;
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index cad1246..035c769 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -49,6 +49,11 @@
#define NFSDBG_FACILITY NFSDBG_VFS
+#define NFS_64_BIT_INODE_NUMBERS_ENABLED 1
+
+/* Default is to see 64-bit inode numbers */
+static int enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED;
+
static void nfs_invalidate_inode(struct inode *);
static int nfs_update_inode(struct inode *, struct nfs_fattr *);
@@ -62,6 +67,25 @@ nfs_fattr_to_ino_t(struct nfs_fattr *fattr)
return nfs_fileid_to_ino_t(fattr->fileid);
}
+/**
+ * nfs_compat_user_ino64 - returns the user-visible inode number
+ * @fileid: 64-bit fileid
+ *
+ * This function returns a 32-bit inode number if the boot parameter
+ * nfs.enable_ino64 is zero.
+ */
+u64 nfs_compat_user_ino64(u64 fileid)
+{
+ int ino;
+
+ if (enable_ino64)
+ return fileid;
+ ino = fileid;
+ if (sizeof(ino) < sizeof(fileid))
+ ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8;
+ return ino;
+}
+
int nfs_write_inode(struct inode *inode, int sync)
{
int ret;
@@ -456,7 +480,7 @@ int nfs_getattr(struct vfsmount *mnt, struct dentry
*dentry, struct kstat *stat)
err = nfs_revalidate_inode(NFS_SERVER(inode), inode);
if (!err) {
generic_fillattr(inode, stat);
- stat->ino = NFS_FILEID(inode);
+ stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode));
}
return err;
}
@@ -1235,6 +1259,7 @@ static void __exit exit_nfs_fs(void)
/* Not quite true; I just maintain it */
MODULE_AUTHOR("Olaf Kirch <[EMAIL PROTECTED]>");
MODULE_LICENSE("GPL");
+module_param(enable_ino64, bool, 0644);
module_init(init_nfs_fs)
module_exit(exit_nfs_fs)
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index 0e0c2e0..c5164c2 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -289,6 +289,7 @@ extern void nfs_setattr_update_inode(struct inode *inode,
struct iattr *attr);
extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context
*ctx);
extern void put_nfs_open_context(struct nfs_open_context *ctx);
extern struct nfs_open_context *nfs_find_open_context(struct inode *inode,
struct rpc_cred *cred, int mode);
+extern u64 nfs_compat_user_ino64(u64 fileid);
/* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */
extern __be32 root_nfs_parse_addr(char *name); /*__init*/
-
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