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605 lines
18 KiB
605 lines
18 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* linux/include/linux/nfs_fs.h |
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* |
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* Copyright (C) 1992 Rick Sladkey |
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* |
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* OS-specific nfs filesystem definitions and declarations |
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*/ |
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#ifndef _LINUX_NFS_FS_H |
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#define _LINUX_NFS_FS_H |
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#include <uapi/linux/nfs_fs.h> |
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/* |
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* Enable dprintk() debugging support for nfs client. |
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*/ |
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#ifdef CONFIG_NFS_DEBUG |
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# define NFS_DEBUG |
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#endif |
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#include <linux/in.h> |
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#include <linux/mm.h> |
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#include <linux/pagemap.h> |
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#include <linux/rbtree.h> |
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#include <linux/refcount.h> |
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#include <linux/rwsem.h> |
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#include <linux/wait.h> |
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#include <linux/sunrpc/debug.h> |
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#include <linux/sunrpc/auth.h> |
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#include <linux/sunrpc/clnt.h> |
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#include <linux/nfs.h> |
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#include <linux/nfs2.h> |
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#include <linux/nfs3.h> |
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#include <linux/nfs4.h> |
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#include <linux/nfs_xdr.h> |
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#include <linux/nfs_fs_sb.h> |
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#include <linux/mempool.h> |
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/* |
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* These are the default flags for swap requests |
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*/ |
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#define NFS_RPC_SWAPFLAGS (RPC_TASK_SWAPPER|RPC_TASK_ROOTCREDS) |
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/* |
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* Size of the NFS directory verifier |
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*/ |
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#define NFS_DIR_VERIFIER_SIZE 2 |
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/* |
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* NFSv3/v4 Access mode cache entry |
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*/ |
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struct nfs_access_entry { |
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struct rb_node rb_node; |
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struct list_head lru; |
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const struct cred * cred; |
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__u32 mask; |
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struct rcu_head rcu_head; |
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}; |
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struct nfs_lock_context { |
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refcount_t count; |
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struct list_head list; |
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struct nfs_open_context *open_context; |
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fl_owner_t lockowner; |
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atomic_t io_count; |
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struct rcu_head rcu_head; |
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}; |
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struct nfs4_state; |
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struct nfs_open_context { |
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struct nfs_lock_context lock_context; |
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fl_owner_t flock_owner; |
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struct dentry *dentry; |
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const struct cred *cred; |
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struct rpc_cred *ll_cred; /* low-level cred - use to check for expiry */ |
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struct nfs4_state *state; |
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fmode_t mode; |
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unsigned long flags; |
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#define NFS_CONTEXT_RESEND_WRITES (1) |
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#define NFS_CONTEXT_BAD (2) |
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#define NFS_CONTEXT_UNLOCK (3) |
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int error; |
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struct list_head list; |
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struct nfs4_threshold *mdsthreshold; |
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struct rcu_head rcu_head; |
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}; |
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struct nfs_open_dir_context { |
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struct list_head list; |
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unsigned long attr_gencount; |
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__be32 verf[NFS_DIR_VERIFIER_SIZE]; |
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__u64 dir_cookie; |
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__u64 dup_cookie; |
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signed char duped; |
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}; |
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/* |
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* NFSv4 delegation |
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*/ |
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struct nfs_delegation; |
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struct posix_acl; |
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struct nfs4_xattr_cache; |
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/* |
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* nfs fs inode data in memory |
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*/ |
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struct nfs_inode { |
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/* |
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* The 64bit 'inode number' |
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*/ |
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__u64 fileid; |
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/* |
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* NFS file handle |
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*/ |
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struct nfs_fh fh; |
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/* |
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* Various flags |
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*/ |
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unsigned long flags; /* atomic bit ops */ |
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unsigned long cache_validity; /* bit mask */ |
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/* |
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* read_cache_jiffies is when we started read-caching this inode. |
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* attrtimeo is for how long the cached information is assumed |
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* to be valid. A successful attribute revalidation doubles |
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* attrtimeo (up to acregmax/acdirmax), a failure resets it to |
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* acregmin/acdirmin. |
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* |
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* We need to revalidate the cached attrs for this inode if |
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* |
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* jiffies - read_cache_jiffies >= attrtimeo |
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* |
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* Please note the comparison is greater than or equal |
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* so that zero timeout values can be specified. |
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*/ |
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unsigned long read_cache_jiffies; |
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unsigned long attrtimeo; |
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unsigned long attrtimeo_timestamp; |
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unsigned long attr_gencount; |
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/* "Generation counter" for the attribute cache. This is |
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* bumped whenever we update the metadata on the |
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* server. |
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*/ |
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unsigned long cache_change_attribute; |
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struct rb_root access_cache; |
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struct list_head access_cache_entry_lru; |
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struct list_head access_cache_inode_lru; |
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/* |
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* This is the cookie verifier used for NFSv3 readdir |
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* operations |
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*/ |
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__be32 cookieverf[NFS_DIR_VERIFIER_SIZE]; |
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atomic_long_t nrequests; |
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struct nfs_mds_commit_info commit_info; |
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/* Open contexts for shared mmap writes */ |
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struct list_head open_files; |
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/* Readers: in-flight sillydelete RPC calls */ |
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/* Writers: rmdir */ |
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struct rw_semaphore rmdir_sem; |
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struct mutex commit_mutex; |
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/* track last access to cached pages */ |
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unsigned long page_index; |
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#if IS_ENABLED(CONFIG_NFS_V4) |
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struct nfs4_cached_acl *nfs4_acl; |
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/* NFSv4 state */ |
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struct list_head open_states; |
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struct nfs_delegation __rcu *delegation; |
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struct rw_semaphore rwsem; |
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/* pNFS layout information */ |
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struct pnfs_layout_hdr *layout; |
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#endif /* CONFIG_NFS_V4*/ |
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/* how many bytes have been written/read and how many bytes queued up */ |
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__u64 write_io; |
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__u64 read_io; |
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#ifdef CONFIG_NFS_FSCACHE |
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struct fscache_cookie *fscache; |
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#endif |
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struct inode vfs_inode; |
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#ifdef CONFIG_NFS_V4_2 |
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struct nfs4_xattr_cache *xattr_cache; |
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#endif |
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}; |
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struct nfs4_copy_state { |
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struct list_head copies; |
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struct list_head src_copies; |
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nfs4_stateid stateid; |
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struct completion completion; |
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uint64_t count; |
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struct nfs_writeverf verf; |
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int error; |
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int flags; |
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struct nfs4_state *parent_src_state; |
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struct nfs4_state *parent_dst_state; |
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}; |
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/* |
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* Access bit flags |
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*/ |
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#define NFS_ACCESS_READ 0x0001 |
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#define NFS_ACCESS_LOOKUP 0x0002 |
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#define NFS_ACCESS_MODIFY 0x0004 |
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#define NFS_ACCESS_EXTEND 0x0008 |
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#define NFS_ACCESS_DELETE 0x0010 |
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#define NFS_ACCESS_EXECUTE 0x0020 |
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#define NFS_ACCESS_XAREAD 0x0040 |
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#define NFS_ACCESS_XAWRITE 0x0080 |
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#define NFS_ACCESS_XALIST 0x0100 |
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/* |
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* Cache validity bit flags |
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*/ |
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#define NFS_INO_INVALID_DATA BIT(1) /* cached data is invalid */ |
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#define NFS_INO_INVALID_ATIME BIT(2) /* cached atime is invalid */ |
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#define NFS_INO_INVALID_ACCESS BIT(3) /* cached access cred invalid */ |
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#define NFS_INO_INVALID_ACL BIT(4) /* cached acls are invalid */ |
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#define NFS_INO_REVAL_PAGECACHE BIT(5) /* must revalidate pagecache */ |
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#define NFS_INO_REVAL_FORCED BIT(6) /* force revalidation ignoring a delegation */ |
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#define NFS_INO_INVALID_LABEL BIT(7) /* cached label is invalid */ |
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#define NFS_INO_INVALID_CHANGE BIT(8) /* cached change is invalid */ |
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#define NFS_INO_INVALID_CTIME BIT(9) /* cached ctime is invalid */ |
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#define NFS_INO_INVALID_MTIME BIT(10) /* cached mtime is invalid */ |
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#define NFS_INO_INVALID_SIZE BIT(11) /* cached size is invalid */ |
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#define NFS_INO_INVALID_OTHER BIT(12) /* other attrs are invalid */ |
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#define NFS_INO_DATA_INVAL_DEFER \ |
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BIT(13) /* Deferred cache invalidation */ |
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#define NFS_INO_INVALID_BLOCKS BIT(14) /* cached blocks are invalid */ |
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#define NFS_INO_INVALID_XATTR BIT(15) /* xattrs are invalid */ |
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#define NFS_INO_INVALID_ATTR (NFS_INO_INVALID_CHANGE \ |
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| NFS_INO_INVALID_CTIME \ |
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| NFS_INO_INVALID_MTIME \ |
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| NFS_INO_INVALID_SIZE \ |
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| NFS_INO_INVALID_OTHER) /* inode metadata is invalid */ |
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/* |
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* Bit offsets in flags field |
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*/ |
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#define NFS_INO_ADVISE_RDPLUS (0) /* advise readdirplus */ |
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#define NFS_INO_STALE (1) /* possible stale inode */ |
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#define NFS_INO_ACL_LRU_SET (2) /* Inode is on the LRU list */ |
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#define NFS_INO_INVALIDATING (3) /* inode is being invalidated */ |
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#define NFS_INO_FSCACHE (5) /* inode can be cached by FS-Cache */ |
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#define NFS_INO_FSCACHE_LOCK (6) /* FS-Cache cookie management lock */ |
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#define NFS_INO_LAYOUTCOMMIT (9) /* layoutcommit required */ |
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#define NFS_INO_LAYOUTCOMMITTING (10) /* layoutcommit inflight */ |
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#define NFS_INO_LAYOUTSTATS (11) /* layoutstats inflight */ |
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#define NFS_INO_ODIRECT (12) /* I/O setting is O_DIRECT */ |
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static inline struct nfs_inode *NFS_I(const struct inode *inode) |
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{ |
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return container_of(inode, struct nfs_inode, vfs_inode); |
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} |
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static inline struct nfs_server *NFS_SB(const struct super_block *s) |
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{ |
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return (struct nfs_server *)(s->s_fs_info); |
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} |
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static inline struct nfs_fh *NFS_FH(const struct inode *inode) |
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{ |
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return &NFS_I(inode)->fh; |
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} |
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static inline struct nfs_server *NFS_SERVER(const struct inode *inode) |
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{ |
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return NFS_SB(inode->i_sb); |
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} |
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static inline struct rpc_clnt *NFS_CLIENT(const struct inode *inode) |
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{ |
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return NFS_SERVER(inode)->client; |
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} |
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static inline const struct nfs_rpc_ops *NFS_PROTO(const struct inode *inode) |
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{ |
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return NFS_SERVER(inode)->nfs_client->rpc_ops; |
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} |
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static inline unsigned NFS_MINATTRTIMEO(const struct inode *inode) |
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{ |
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struct nfs_server *nfss = NFS_SERVER(inode); |
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return S_ISDIR(inode->i_mode) ? nfss->acdirmin : nfss->acregmin; |
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} |
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static inline unsigned NFS_MAXATTRTIMEO(const struct inode *inode) |
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{ |
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struct nfs_server *nfss = NFS_SERVER(inode); |
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return S_ISDIR(inode->i_mode) ? nfss->acdirmax : nfss->acregmax; |
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} |
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static inline int NFS_STALE(const struct inode *inode) |
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{ |
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return test_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
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} |
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static inline struct fscache_cookie *nfs_i_fscache(struct inode *inode) |
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{ |
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#ifdef CONFIG_NFS_FSCACHE |
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return NFS_I(inode)->fscache; |
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#else |
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return NULL; |
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#endif |
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} |
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static inline __u64 NFS_FILEID(const struct inode *inode) |
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{ |
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return NFS_I(inode)->fileid; |
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} |
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static inline void set_nfs_fileid(struct inode *inode, __u64 fileid) |
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{ |
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NFS_I(inode)->fileid = fileid; |
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} |
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static inline void nfs_mark_for_revalidate(struct inode *inode) |
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{ |
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struct nfs_inode *nfsi = NFS_I(inode); |
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spin_lock(&inode->i_lock); |
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nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE |
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| NFS_INO_INVALID_ACCESS |
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| NFS_INO_INVALID_ACL |
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| NFS_INO_INVALID_CHANGE |
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| NFS_INO_INVALID_CTIME; |
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if (S_ISDIR(inode->i_mode)) |
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nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
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spin_unlock(&inode->i_lock); |
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} |
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static inline int nfs_server_capable(struct inode *inode, int cap) |
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{ |
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return NFS_SERVER(inode)->caps & cap; |
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} |
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/** |
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* nfs_save_change_attribute - Returns the inode attribute change cookie |
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* @dir - pointer to parent directory inode |
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* The "cache change attribute" is updated when we need to revalidate |
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* our dentry cache after a directory was seen to change on the server. |
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*/ |
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static inline unsigned long nfs_save_change_attribute(struct inode *dir) |
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{ |
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return NFS_I(dir)->cache_change_attribute; |
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} |
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/* |
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* linux/fs/nfs/inode.c |
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*/ |
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extern int nfs_sync_mapping(struct address_space *mapping); |
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extern void nfs_zap_mapping(struct inode *inode, struct address_space *mapping); |
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extern void nfs_zap_caches(struct inode *); |
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extern void nfs_set_inode_stale(struct inode *inode); |
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extern void nfs_invalidate_atime(struct inode *); |
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extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *, |
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struct nfs_fattr *, struct nfs4_label *); |
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struct inode *nfs_ilookup(struct super_block *sb, struct nfs_fattr *, struct nfs_fh *); |
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extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *); |
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extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr); |
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extern int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr); |
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extern int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fattr *fattr); |
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extern int nfs_getattr(struct user_namespace *, const struct path *, |
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struct kstat *, u32, unsigned int); |
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extern void nfs_access_add_cache(struct inode *, struct nfs_access_entry *); |
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extern void nfs_access_set_mask(struct nfs_access_entry *, u32); |
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extern int nfs_permission(struct user_namespace *, struct inode *, int); |
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extern int nfs_open(struct inode *, struct file *); |
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extern int nfs_attribute_cache_expired(struct inode *inode); |
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extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode); |
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extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *); |
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extern int nfs_clear_invalid_mapping(struct address_space *mapping); |
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extern bool nfs_mapping_need_revalidate_inode(struct inode *inode); |
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extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping); |
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extern int nfs_revalidate_mapping_rcu(struct inode *inode); |
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extern int nfs_setattr(struct user_namespace *, struct dentry *, struct iattr *); |
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extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr, struct nfs_fattr *); |
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extern void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, |
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struct nfs4_label *label); |
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extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx); |
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extern void put_nfs_open_context(struct nfs_open_context *ctx); |
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extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, const struct cred *cred, fmode_t mode); |
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extern struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode, struct file *filp); |
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extern void nfs_inode_attach_open_context(struct nfs_open_context *ctx); |
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extern void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx); |
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extern void nfs_file_clear_open_context(struct file *flip); |
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extern struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx); |
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extern void nfs_put_lock_context(struct nfs_lock_context *l_ctx); |
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extern u64 nfs_compat_user_ino64(u64 fileid); |
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extern void nfs_fattr_init(struct nfs_fattr *fattr); |
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extern void nfs_fattr_set_barrier(struct nfs_fattr *fattr); |
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extern unsigned long nfs_inc_attr_generation_counter(void); |
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extern struct nfs_fattr *nfs_alloc_fattr(void); |
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static inline void nfs_free_fattr(const struct nfs_fattr *fattr) |
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{ |
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kfree(fattr); |
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} |
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extern struct nfs_fh *nfs_alloc_fhandle(void); |
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static inline void nfs_free_fhandle(const struct nfs_fh *fh) |
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{ |
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kfree(fh); |
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} |
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#ifdef NFS_DEBUG |
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extern u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh); |
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static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh) |
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{ |
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return _nfs_display_fhandle_hash(fh); |
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} |
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extern void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption); |
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#define nfs_display_fhandle(fh, caption) \ |
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do { \ |
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if (unlikely(nfs_debug & NFSDBG_FACILITY)) \ |
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_nfs_display_fhandle(fh, caption); \ |
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} while (0) |
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#else |
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static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh) |
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{ |
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return 0; |
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} |
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static inline void nfs_display_fhandle(const struct nfs_fh *fh, |
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const char *caption) |
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{ |
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} |
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#endif |
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/* |
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* linux/fs/nfs/nfsroot.c |
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*/ |
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extern int nfs_root_data(char **root_device, char **root_data); /*__init*/ |
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/* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */ |
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extern __be32 root_nfs_parse_addr(char *name); /*__init*/ |
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/* |
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* linux/fs/nfs/file.c |
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*/ |
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extern const struct file_operations nfs_file_operations; |
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#if IS_ENABLED(CONFIG_NFS_V4) |
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extern const struct file_operations nfs4_file_operations; |
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#endif /* CONFIG_NFS_V4 */ |
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extern const struct address_space_operations nfs_file_aops; |
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extern const struct address_space_operations nfs_dir_aops; |
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static inline struct nfs_open_context *nfs_file_open_context(struct file *filp) |
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{ |
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return filp->private_data; |
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} |
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static inline const struct cred *nfs_file_cred(struct file *file) |
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{ |
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if (file != NULL) { |
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struct nfs_open_context *ctx = |
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nfs_file_open_context(file); |
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if (ctx) |
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return ctx->cred; |
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} |
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return NULL; |
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} |
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/* |
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* linux/fs/nfs/direct.c |
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*/ |
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extern ssize_t nfs_direct_IO(struct kiocb *, struct iov_iter *); |
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extern ssize_t nfs_file_direct_read(struct kiocb *iocb, |
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struct iov_iter *iter); |
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extern ssize_t nfs_file_direct_write(struct kiocb *iocb, |
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struct iov_iter *iter); |
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/* |
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* linux/fs/nfs/dir.c |
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*/ |
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extern const struct file_operations nfs_dir_operations; |
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extern const struct dentry_operations nfs_dentry_operations; |
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extern void nfs_force_lookup_revalidate(struct inode *dir); |
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extern void nfs_set_verifier(struct dentry * dentry, unsigned long verf); |
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#if IS_ENABLED(CONFIG_NFS_V4) |
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extern void nfs_clear_verifier_delegated(struct inode *inode); |
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#endif /* IS_ENABLED(CONFIG_NFS_V4) */ |
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extern struct dentry *nfs_add_or_obtain(struct dentry *dentry, |
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struct nfs_fh *fh, struct nfs_fattr *fattr, |
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struct nfs4_label *label); |
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extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, |
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struct nfs_fattr *fattr, struct nfs4_label *label); |
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extern int nfs_may_open(struct inode *inode, const struct cred *cred, int openflags); |
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extern void nfs_access_zap_cache(struct inode *inode); |
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extern int nfs_access_get_cached(struct inode *inode, const struct cred *cred, struct nfs_access_entry *res, |
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bool may_block); |
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/* |
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* linux/fs/nfs/symlink.c |
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*/ |
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extern const struct inode_operations nfs_symlink_inode_operations; |
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/* |
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* linux/fs/nfs/sysctl.c |
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*/ |
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#ifdef CONFIG_SYSCTL |
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extern int nfs_register_sysctl(void); |
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extern void nfs_unregister_sysctl(void); |
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#else |
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#define nfs_register_sysctl() 0 |
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#define nfs_unregister_sysctl() do { } while(0) |
|
#endif |
|
|
|
/* |
|
* linux/fs/nfs/namespace.c |
|
*/ |
|
extern const struct inode_operations nfs_mountpoint_inode_operations; |
|
extern const struct inode_operations nfs_referral_inode_operations; |
|
extern int nfs_mountpoint_expiry_timeout; |
|
extern void nfs_release_automount_timer(void); |
|
|
|
/* |
|
* linux/fs/nfs/unlink.c |
|
*/ |
|
extern void nfs_complete_unlink(struct dentry *dentry, struct inode *); |
|
|
|
/* |
|
* linux/fs/nfs/write.c |
|
*/ |
|
extern int nfs_congestion_kb; |
|
extern int nfs_writepage(struct page *page, struct writeback_control *wbc); |
|
extern int nfs_writepages(struct address_space *, struct writeback_control *); |
|
extern int nfs_flush_incompatible(struct file *file, struct page *page); |
|
extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int); |
|
|
|
/* |
|
* Try to write back everything synchronously (but check the |
|
* return value!) |
|
*/ |
|
extern int nfs_sync_inode(struct inode *inode); |
|
extern int nfs_wb_all(struct inode *inode); |
|
extern int nfs_wb_page(struct inode *inode, struct page *page); |
|
extern int nfs_wb_page_cancel(struct inode *inode, struct page* page); |
|
extern int nfs_commit_inode(struct inode *, int); |
|
extern struct nfs_commit_data *nfs_commitdata_alloc(bool never_fail); |
|
extern void nfs_commit_free(struct nfs_commit_data *data); |
|
|
|
static inline int |
|
nfs_have_writebacks(struct inode *inode) |
|
{ |
|
return atomic_long_read(&NFS_I(inode)->nrequests) != 0; |
|
} |
|
|
|
/* |
|
* linux/fs/nfs/read.c |
|
*/ |
|
extern int nfs_readpage(struct file *, struct page *); |
|
extern int nfs_readpages(struct file *, struct address_space *, |
|
struct list_head *, unsigned); |
|
|
|
/* |
|
* inline functions |
|
*/ |
|
|
|
static inline loff_t nfs_size_to_loff_t(__u64 size) |
|
{ |
|
return min_t(u64, size, OFFSET_MAX); |
|
} |
|
|
|
static inline ino_t |
|
nfs_fileid_to_ino_t(u64 fileid) |
|
{ |
|
ino_t ino = (ino_t) fileid; |
|
if (sizeof(ino_t) < sizeof(u64)) |
|
ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8; |
|
return ino; |
|
} |
|
|
|
#define NFS_JUKEBOX_RETRY_TIME (5 * HZ) |
|
|
|
|
|
# undef ifdebug |
|
# ifdef NFS_DEBUG |
|
# define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac)) |
|
# define NFS_IFDEBUG(x) x |
|
# else |
|
# define ifdebug(fac) if (0) |
|
# define NFS_IFDEBUG(x) |
|
# endif |
|
#endif
|
|
|