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![Trond Myklebust](/assets/img/avatar_default.png)
If an NFS client does mkdir("dir"); fd = open("dir/file"); unlink("dir/file"); close(fd); rmdir("dir"); then the asynchronous nature of the sillyrename operation means that we can end up getting EBUSY for the rmdir() in the above test. Fix that by ensuring that we wait for any in-progress sillyrenames before sending the rmdir() to the server. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
631 lines
18 KiB
C
631 lines
18 KiB
C
/*
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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/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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* 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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unsigned long jiffies;
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struct rpc_cred * cred;
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int mask;
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};
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struct nfs_lockowner {
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fl_owner_t l_owner;
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pid_t l_pid;
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};
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#define NFS_IO_INPROGRESS 0
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struct nfs_io_counter {
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unsigned long flags;
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atomic_t io_count;
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};
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struct nfs_lock_context {
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atomic_t count;
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struct list_head list;
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struct nfs_open_context *open_context;
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struct nfs_lockowner lockowner;
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struct nfs_io_counter io_count;
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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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struct dentry *dentry;
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struct rpc_cred *cred;
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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_ERROR_WRITE (0)
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#define NFS_CONTEXT_RESEND_WRITES (1)
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#define NFS_CONTEXT_BAD (2)
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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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};
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struct nfs_open_dir_context {
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struct rpc_cred *cred;
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unsigned long attr_gencount;
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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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/*
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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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#ifdef CONFIG_NFS_V3_ACL
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struct posix_acl *acl_access;
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struct posix_acl *acl_default;
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#endif
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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[2];
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unsigned long npages;
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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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/* Number of in-flight sillydelete RPC calls */
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atomic_t silly_count;
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/* List of deferred sillydelete requests */
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struct hlist_head silly_list;
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wait_queue_head_t waitqueue;
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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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fmode_t delegation_state;
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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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};
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/*
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* Cache validity bit flags
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*/
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#define NFS_INO_INVALID_ATTR 0x0001 /* cached attrs are invalid */
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#define NFS_INO_INVALID_DATA 0x0002 /* cached data is invalid */
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#define NFS_INO_INVALID_ATIME 0x0004 /* cached atime is invalid */
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#define NFS_INO_INVALID_ACCESS 0x0008 /* cached access cred invalid */
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#define NFS_INO_INVALID_ACL 0x0010 /* cached acls are invalid */
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#define NFS_INO_REVAL_PAGECACHE 0x0020 /* must revalidate pagecache */
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#define NFS_INO_REVAL_FORCED 0x0040 /* force revalidation ignoring a delegation */
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#define NFS_INO_INVALID_LABEL 0x0080 /* cached label 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_FLUSHING (4) /* inode is flushing out data */
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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_COMMIT (7) /* inode is committing unstable writes */
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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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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 int NFS_FSCACHE(const struct inode *inode)
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{
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return test_bit(NFS_INO_FSCACHE, &NFS_I(inode)->flags);
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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_INVALID_ATTR|NFS_INO_INVALID_ACCESS;
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if (S_ISDIR(inode->i_mode))
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nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE|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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static inline void nfs_set_verifier(struct dentry * dentry, unsigned long verf)
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{
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dentry->d_time = verf;
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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 "change attribute" is updated every time we finish an operation
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* that will result in a metadata 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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* nfs_verify_change_attribute - Detects NFS remote directory changes
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* @dir - pointer to parent directory inode
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* @chattr - previously saved change attribute
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* Return "false" if the verifiers doesn't match the change attribute.
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* This would usually indicate that the directory contents have changed on
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* the server, and that any dentries need revalidating.
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*/
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static inline int nfs_verify_change_attribute(struct inode *dir, unsigned long chattr)
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{
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return chattr == 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_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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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_getattr(struct vfsmount *, struct dentry *, struct kstat *);
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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 inode *, int);
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extern int nfs_open(struct inode *, struct file *);
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extern int nfs_release(struct inode *, struct file *);
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extern int nfs_attribute_timeout(struct inode *inode);
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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_revalidate_mapping(struct inode *inode, struct address_space *mapping);
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extern int nfs_setattr(struct dentry *, struct iattr *);
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extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr);
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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, struct rpc_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);
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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 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 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 struct rpc_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/xattr.c
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*/
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#ifdef CONFIG_NFS_V3_ACL
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extern ssize_t nfs3_listxattr(struct dentry *, char *, size_t);
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extern ssize_t nfs3_getxattr(struct dentry *, const char *, void *, size_t);
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extern int nfs3_setxattr(struct dentry *, const char *,
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const void *, size_t, int);
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extern int nfs3_removexattr (struct dentry *, const char *name);
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#else
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# define nfs3_listxattr NULL
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# define nfs3_getxattr NULL
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# define nfs3_setxattr NULL
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# define nfs3_removexattr NULL
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#endif
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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(int, struct kiocb *, const struct iovec *, loff_t,
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unsigned long);
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extern ssize_t nfs_file_direct_read(struct kiocb *iocb,
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const struct iovec *iov, unsigned long nr_segs,
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loff_t pos, bool uio);
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extern ssize_t nfs_file_direct_write(struct kiocb *iocb,
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const struct iovec *iov, unsigned long nr_segs,
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loff_t pos, bool uio);
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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 int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh,
|
|
struct nfs_fattr *fattr, struct nfs4_label *label);
|
|
extern int nfs_may_open(struct inode *inode, struct rpc_cred *cred, int openflags);
|
|
extern void nfs_access_zap_cache(struct inode *inode);
|
|
|
|
/*
|
|
* linux/fs/nfs/symlink.c
|
|
*/
|
|
extern const struct inode_operations nfs_symlink_inode_operations;
|
|
|
|
/*
|
|
* linux/fs/nfs/sysctl.c
|
|
*/
|
|
#ifdef CONFIG_SYSCTL
|
|
extern int nfs_register_sysctl(void);
|
|
extern void nfs_unregister_sysctl(void);
|
|
#else
|
|
#define nfs_register_sysctl() 0
|
|
#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/nfs4proc.c
|
|
*/
|
|
#ifdef CONFIG_NFS_V4_SECURITY_LABEL
|
|
extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags);
|
|
static inline void nfs4_label_free(struct nfs4_label *label)
|
|
{
|
|
if (label) {
|
|
kfree(label->label);
|
|
kfree(label);
|
|
}
|
|
return;
|
|
}
|
|
#else
|
|
static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; }
|
|
static inline void nfs4_label_free(void *label) {}
|
|
#endif
|
|
|
|
/*
|
|
* linux/fs/nfs/unlink.c
|
|
*/
|
|
extern void nfs_complete_unlink(struct dentry *dentry, struct inode *);
|
|
extern void nfs_wait_on_sillyrename(struct dentry *dentry);
|
|
extern void nfs_block_sillyrename(struct dentry *dentry);
|
|
extern void nfs_unblock_sillyrename(struct dentry *dentry);
|
|
extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry);
|
|
|
|
/*
|
|
* 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);
|
|
extern void nfs_writeback_done(struct rpc_task *, struct nfs_write_data *);
|
|
|
|
/*
|
|
* Try to write back everything synchronously (but check the
|
|
* return value!)
|
|
*/
|
|
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);
|
|
#if IS_ENABLED(CONFIG_NFS_V3) || IS_ENABLED(CONFIG_NFS_V4)
|
|
extern int nfs_commit_inode(struct inode *, int);
|
|
extern struct nfs_commit_data *nfs_commitdata_alloc(void);
|
|
extern void nfs_commit_free(struct nfs_commit_data *data);
|
|
#else
|
|
static inline int
|
|
nfs_commit_inode(struct inode *inode, int how)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static inline int
|
|
nfs_have_writebacks(struct inode *inode)
|
|
{
|
|
return NFS_I(inode)->npages != 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);
|
|
extern int nfs_readpage_result(struct rpc_task *, struct nfs_read_data *);
|
|
extern int nfs_readpage_async(struct nfs_open_context *, struct inode *,
|
|
struct page *);
|
|
|
|
/*
|
|
* linux/fs/nfs3proc.c
|
|
*/
|
|
#ifdef CONFIG_NFS_V3_ACL
|
|
extern struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type);
|
|
extern int nfs3_proc_setacl(struct inode *inode, int type,
|
|
struct posix_acl *acl);
|
|
extern int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode,
|
|
umode_t mode);
|
|
extern void nfs3_forget_cached_acls(struct inode *inode);
|
|
#else
|
|
static inline int nfs3_proc_set_default_acl(struct inode *dir,
|
|
struct inode *inode,
|
|
umode_t mode)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void nfs3_forget_cached_acls(struct inode *inode)
|
|
{
|
|
}
|
|
#endif /* CONFIG_NFS_V3_ACL */
|
|
|
|
/*
|
|
* inline functions
|
|
*/
|
|
|
|
static inline loff_t nfs_size_to_loff_t(__u64 size)
|
|
{
|
|
if (size > (__u64) OFFSET_MAX - 1)
|
|
return OFFSET_MAX - 1;
|
|
return (loff_t) size;
|
|
}
|
|
|
|
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
|