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Diffstat (limited to '')
-rw-r--r-- | fs/nfs/nfs42.h | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/fs/nfs/nfs42.h b/fs/nfs/nfs42.h new file mode 100644 index 000000000..0fe5aacbc --- /dev/null +++ b/fs/nfs/nfs42.h @@ -0,0 +1,64 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (c) 2014 Anna Schumaker <Anna.Schumaker@Netapp.com> + */ + +#ifndef __LINUX_FS_NFS_NFS4_2_H +#define __LINUX_FS_NFS_NFS4_2_H + +#include <linux/xattr.h> + +/* + * FIXME: four LAYOUTSTATS calls per compound at most! Do we need to support + * more? Need to consider not to pre-alloc too much for a compound. + */ +#define PNFS_LAYOUTSTATS_MAXDEV (4) + +/* nfs4.2proc.c */ +#ifdef CONFIG_NFS_V4_2 +int nfs42_proc_allocate(struct file *, loff_t, loff_t); +ssize_t nfs42_proc_copy(struct file *, loff_t, struct file *, loff_t, size_t, + struct nl4_server *, nfs4_stateid *, bool); +int nfs42_proc_deallocate(struct file *, loff_t, loff_t); +loff_t nfs42_proc_llseek(struct file *, loff_t, int); +int nfs42_proc_layoutstats_generic(struct nfs_server *, + struct nfs42_layoutstat_data *); +int nfs42_proc_clone(struct file *, struct file *, loff_t, loff_t, loff_t); +int nfs42_proc_layouterror(struct pnfs_layout_segment *lseg, + const struct nfs42_layout_error *errors, + size_t n); +int nfs42_proc_copy_notify(struct file *, struct file *, + struct nfs42_copy_notify_res *); +static inline bool nfs42_files_from_same_server(struct file *in, + struct file *out) +{ + struct nfs_client *c_in = (NFS_SERVER(file_inode(in)))->nfs_client; + struct nfs_client *c_out = (NFS_SERVER(file_inode(out)))->nfs_client; + + return nfs4_check_serverowner_major_id(c_in->cl_serverowner, + c_out->cl_serverowner); +} + +ssize_t nfs42_proc_getxattr(struct inode *inode, const char *name, + void *buf, size_t buflen); +int nfs42_proc_setxattr(struct inode *inode, const char *name, + const void *buf, size_t buflen, int flags); +ssize_t nfs42_proc_listxattrs(struct inode *inode, void *buf, + size_t buflen, u64 *cookiep, bool *eofp); +int nfs42_proc_removexattr(struct inode *inode, const char *name); + +/* + * Maximum XDR buffer size needed for a listxattr buffer of buflen size. + * + * The upper boundary is a buffer with all 1-byte sized attribute names. + * They would be 7 bytes long in the eventual buffer ("user.x\0"), and + * 8 bytes long XDR-encoded. + * + * Include the trailing eof word as well. + */ +static inline u32 nfs42_listxattr_xdrsize(u32 buflen) +{ + return ((buflen / (XATTR_USER_PREFIX_LEN + 2)) * 8) + 4; +} +#endif /* CONFIG_NFS_V4_2 */ +#endif /* __LINUX_FS_NFS_NFS4_2_H */ |