diff options
| -rw-r--r-- | Documentation/kernel-parameters.txt | 7 | ||||
| -rw-r--r-- | fs/nfs/dir.c | 3 | ||||
| -rw-r--r-- | fs/nfs/inode.c | 27 | ||||
| -rw-r--r-- | 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 4d175c751246..83e21045114e 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 a4fdc4cc306c..8ec7fbd8240c 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 cad1246bf575..035c769b715e 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 <okir@monad.swb.de>"); 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 0e0c2e0d3aa3..c5164c257f71 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*/ |