* When flushing a cluster of dirty pages, there can be different
* strategies:
*/
+#define FLUSH_AGING 0 /* only flush old buffers */
#define FLUSH_SYNC 1 /* file being synced, or contention */
+#define FLUSH_WAIT 2 /* wait for completion */
#define FLUSH_STABLE 4 /* commit to stable storage */
#define FLUSH_LOWPRI 8 /* low priority background flush */
#define FLUSH_HIGHPRI 16 /* high priority memory reclaim flush */
struct nfs4_state;
struct nfs_open_context {
atomic_t count;
- struct vfsmount *vfsmnt;
struct dentry *dentry;
struct rpc_cred *cred;
struct nfs4_state *state;
unsigned long cache_validity; /* bit mask */
/*
- * read_cache_jiffies is when we started read-caching this inode.
+ * read_cache_jiffies is when we started read-caching this inode,
+ * and read_cache_mtime is the mtime of the inode at that time.
* attrtimeo is for how long the cached information is assumed
* to be valid. A successful attribute revalidation doubles
* attrtimeo (up to acregmax/acdirmax), a failure resets it to
* We need to revalidate the cached attrs for this inode if
*
* jiffies - read_cache_jiffies > attrtimeo
+ *
+ * and invalidate any cached data/flush out any dirty pages if
+ * we find that
+ *
+ * mtime != read_cache_mtime
*/
unsigned long read_cache_jiffies;
unsigned long attrtimeo;
extern void nfs_end_attr_update(struct inode *);
extern void nfs_begin_data_update(struct inode *);
extern void nfs_end_data_update(struct inode *);
+extern struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, struct rpc_cred *cred);
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 void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx);
extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, int mode);
+extern void nfs_file_clear_open_context(struct file *filp);
/* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */
extern u32 root_nfs_parse_addr(char *name); /*__init*/
#ifdef CONFIG_NFS_V3
extern struct inode_operations nfs3_file_inode_operations;
#endif /* CONFIG_NFS_V3 */
-extern const struct file_operations nfs_file_operations;
+extern struct file_operations nfs_file_operations;
extern struct address_space_operations nfs_file_aops;
static inline struct rpc_cred *nfs_file_cred(struct file *file)
#ifdef CONFIG_NFS_V3
extern struct inode_operations nfs3_dir_inode_operations;
#endif /* CONFIG_NFS_V3 */
-extern const struct file_operations nfs_dir_operations;
+extern struct file_operations nfs_dir_operations;
extern struct dentry_operations nfs_dentry_operations;
extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr);
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 int nfs_writeback_done(struct rpc_task *, struct nfs_write_data *);
-extern void nfs_writedata_release(void *);
+extern void nfs_writeback_done(struct rpc_task *task, void *data);
+extern void nfs_writedata_release(void *data);
#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
-struct nfs_write_data *nfs_commit_alloc(unsigned int pagecount);
-void nfs_commit_free(struct nfs_write_data *p);
+extern void nfs_commit_done(struct rpc_task *, void *data);
+extern void nfs_commit_release(void *data);
#endif
/*
* Try to write back everything synchronously (but check the
* return value!)
*/
-extern int nfs_sync_inode_wait(struct inode *, unsigned long, unsigned int, int);
+extern int nfs_sync_inode(struct inode *, unsigned long, unsigned int, int);
#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
extern int nfs_commit_inode(struct inode *, int);
-extern void nfs_commit_release(void *wdata);
#else
static inline int
nfs_commit_inode(struct inode *inode, int how)
static inline int
nfs_wb_all(struct inode *inode)
{
- int error = nfs_sync_inode_wait(inode, 0, 0, 0);
+ int error = nfs_sync_inode(inode, 0, 0, FLUSH_WAIT);
return (error < 0) ? error : 0;
}
*/
static inline int nfs_wb_page_priority(struct inode *inode, struct page* page, int how)
{
- int error = nfs_sync_inode_wait(inode, page->index, 1,
- how | FLUSH_STABLE);
+ int error = nfs_sync_inode(inode, page->index, 1,
+ how | FLUSH_WAIT | FLUSH_STABLE);
return (error < 0) ? error : 0;
}
/*
* Allocate and free nfs_write_data structures
*/
-extern struct nfs_write_data *nfs_writedata_alloc(unsigned int pagecount);
-extern void nfs_writedata_free(struct nfs_write_data *p);
+extern mempool_t *nfs_wdata_mempool;
+
+static inline struct nfs_write_data *nfs_writedata_alloc(unsigned int pagecount)
+{
+ struct nfs_write_data *p = mempool_alloc(nfs_wdata_mempool, SLAB_NOFS);
+
+ if (p) {
+ memset(p, 0, sizeof(*p));
+ INIT_LIST_HEAD(&p->pages);
+ if (pagecount < NFS_PAGEVEC_SIZE)
+ p->pagevec = &p->page_array[0];
+ else {
+ size_t size = ++pagecount * sizeof(struct page *);
+ p->pagevec = kmalloc(size, GFP_NOFS);
+ if (p->pagevec) {
+ memset(p->pagevec, 0, size);
+ } else {
+ mempool_free(p, nfs_wdata_mempool);
+ p = NULL;
+ }
+ }
+ }
+ return p;
+}
+
+static inline void nfs_writedata_free(struct nfs_write_data *p)
+{
+ if (p && (p->pagevec != &p->page_array[0]))
+ kfree(p->pagevec);
+ mempool_free(p, nfs_wdata_mempool);
+}
/*
* 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 void nfs_readdata_release(void *data);
+extern void nfs_readpage_result(struct rpc_task *, void *);
+extern void nfs_readdata_release(void *data);
+
/*
* Allocate and free nfs_read_data structures
*/
-extern struct nfs_read_data *nfs_readdata_alloc(unsigned int pagecount);
-extern void nfs_readdata_free(struct nfs_read_data *p);
+extern mempool_t *nfs_rdata_mempool;
+
+static inline struct nfs_read_data *nfs_readdata_alloc(unsigned int pagecount)
+{
+ struct nfs_read_data *p = mempool_alloc(nfs_rdata_mempool, SLAB_NOFS);
+
+ if (p) {
+ memset(p, 0, sizeof(*p));
+ INIT_LIST_HEAD(&p->pages);
+ if (pagecount < NFS_PAGEVEC_SIZE)
+ p->pagevec = &p->page_array[0];
+ else {
+ size_t size = ++pagecount * sizeof(struct page *);
+ p->pagevec = kmalloc(size, GFP_NOFS);
+ if (p->pagevec) {
+ memset(p->pagevec, 0, size);
+ } else {
+ mempool_free(p, nfs_rdata_mempool);
+ p = NULL;
+ }
+ }
+ }
+ return p;
+}
+
+static inline void nfs_readdata_free(struct nfs_read_data *p)
+{
+ if (p && (p->pagevec != &p->page_array[0]))
+ kfree(p->pagevec);
+ mempool_free(p, nfs_rdata_mempool);
+}
/*
* linux/fs/nfs3proc.c
git://git.onelab.eu / linux-2.6.git / blobdiff