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fs/nfs/write.c
55.1 KB
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/* * linux/fs/nfs/write.c * |
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* Write file data over NFS. |
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* * Copyright (C) 1996, 1997, Olaf Kirch <okir@monad.swb.de> */ |
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#include <linux/types.h> #include <linux/slab.h> #include <linux/mm.h> #include <linux/pagemap.h> #include <linux/file.h> |
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#include <linux/writeback.h> |
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#include <linux/swap.h> |
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#include <linux/migrate.h> |
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#include <linux/sunrpc/clnt.h> #include <linux/nfs_fs.h> #include <linux/nfs_mount.h> #include <linux/nfs_page.h> |
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#include <linux/backing-dev.h> |
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#include <linux/export.h> |
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#include <linux/freezer.h> #include <linux/wait.h> |
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|
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#include <linux/uaccess.h> |
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#include "delegation.h" |
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#include "internal.h" |
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#include "iostat.h" |
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#include "nfs4_fs.h" |
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#include "fscache.h" |
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#include "pnfs.h" |
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|
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#include "nfstrace.h" |
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#define NFSDBG_FACILITY NFSDBG_PAGECACHE #define MIN_POOL_WRITE (32) #define MIN_POOL_COMMIT (4) /* * Local function declarations */ |
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static void nfs_redirty_request(struct nfs_page *req); |
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static const struct rpc_call_ops nfs_commit_ops; |
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static const struct nfs_pgio_completion_ops nfs_async_write_completion_ops; |
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static const struct nfs_commit_completion_ops nfs_commit_completion_ops; |
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static const struct nfs_rw_ops nfs_rw_write_ops; |
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static void nfs_clear_request_commit(struct nfs_page *req); |
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static void nfs_init_cinfo_from_inode(struct nfs_commit_info *cinfo, struct inode *inode); |
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static struct nfs_page * nfs_page_search_commits_for_head_request_locked(struct nfs_inode *nfsi, struct page *page); |
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|
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static struct kmem_cache *nfs_wdata_cachep; |
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static mempool_t *nfs_wdata_mempool; |
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static struct kmem_cache *nfs_cdata_cachep; |
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static mempool_t *nfs_commit_mempool; |
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struct nfs_commit_data *nfs_commitdata_alloc(void) |
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{ |
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struct nfs_commit_data *p = mempool_alloc(nfs_commit_mempool, GFP_NOIO); |
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|
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if (p) { memset(p, 0, sizeof(*p)); INIT_LIST_HEAD(&p->pages); } return p; } |
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EXPORT_SYMBOL_GPL(nfs_commitdata_alloc); |
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|
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void nfs_commit_free(struct nfs_commit_data *p) |
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{ mempool_free(p, nfs_commit_mempool); } |
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EXPORT_SYMBOL_GPL(nfs_commit_free); |
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|
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static struct nfs_pgio_header *nfs_writehdr_alloc(void) |
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{ |
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struct nfs_pgio_header *p = mempool_alloc(nfs_wdata_mempool, GFP_NOIO); |
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|
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if (p) |
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memset(p, 0, sizeof(*p)); |
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return p; } |
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|
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static void nfs_writehdr_free(struct nfs_pgio_header *hdr) |
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{ |
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mempool_free(hdr, nfs_wdata_mempool); |
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} |
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|
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static void nfs_context_set_write_error(struct nfs_open_context *ctx, int error) { ctx->error = error; smp_wmb(); set_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags); } |
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/* * nfs_page_find_head_request_locked - find head request associated with @page * * must be called while holding the inode lock. * * returns matching head request with reference held, or NULL if not found. */ |
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static struct nfs_page * |
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nfs_page_find_head_request_locked(struct nfs_inode *nfsi, struct page *page) |
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{ struct nfs_page *req = NULL; |
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if (PagePrivate(page)) |
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req = (struct nfs_page *)page_private(page); |
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else if (unlikely(PageSwapCache(page))) req = nfs_page_search_commits_for_head_request_locked(nfsi, page); |
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|
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if (req) { WARN_ON_ONCE(req->wb_head != req); |
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kref_get(&req->wb_kref); |
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} |
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|
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return req; } |
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/* * nfs_page_find_head_request - find head request associated with @page * * returns matching head request with reference held, or NULL if not found. */ static struct nfs_page *nfs_page_find_head_request(struct page *page) |
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{ |
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struct inode *inode = page_file_mapping(page)->host; |
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struct nfs_page *req = NULL; |
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|
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spin_lock(&inode->i_lock); |
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req = nfs_page_find_head_request_locked(NFS_I(inode), page); |
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spin_unlock(&inode->i_lock); |
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return req; } |
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/* Adjust the file length if we're writing beyond the end */ static void nfs_grow_file(struct page *page, unsigned int offset, unsigned int count) { |
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struct inode *inode = page_file_mapping(page)->host; |
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loff_t end, i_size; pgoff_t end_index; |
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|
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spin_lock(&inode->i_lock); i_size = i_size_read(inode); |
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end_index = (i_size - 1) >> PAGE_SHIFT; |
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if (i_size > 0 && page_index(page) < end_index) |
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goto out; |
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end = page_file_offset(page) + ((loff_t)offset+count); |
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if (i_size >= end) |
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goto out; |
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i_size_write(inode, end); |
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nfs_inc_stats(inode, NFSIOS_EXTENDWRITE); out: spin_unlock(&inode->i_lock); |
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} |
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/* A writeback failed: mark the page as bad, and invalidate the page cache */ static void nfs_set_pageerror(struct page *page) { |
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nfs_zap_mapping(page_file_mapping(page)->host, page_file_mapping(page)); |
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} |
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/* * nfs_page_group_search_locked * @head - head request of page group * @page_offset - offset into page * * Search page group with head @head to find a request that contains the * page offset @page_offset. * * Returns a pointer to the first matching nfs request, or NULL if no * match is found. * * Must be called with the page group lock held */ static struct nfs_page * nfs_page_group_search_locked(struct nfs_page *head, unsigned int page_offset) { struct nfs_page *req; WARN_ON_ONCE(head != head->wb_head); WARN_ON_ONCE(!test_bit(PG_HEADLOCK, &head->wb_head->wb_flags)); req = head; do { if (page_offset >= req->wb_pgbase && page_offset < (req->wb_pgbase + req->wb_bytes)) return req; req = req->wb_this_page; } while (req != head); return NULL; } /* * nfs_page_group_covers_page * @head - head request of page group * * Return true if the page group with head @head covers the whole page, * returns false otherwise */ static bool nfs_page_group_covers_page(struct nfs_page *req) { struct nfs_page *tmp; unsigned int pos = 0; unsigned int len = nfs_page_length(req->wb_page); |
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nfs_page_group_lock(req, false); |
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do { tmp = nfs_page_group_search_locked(req->wb_head, pos); if (tmp) { /* no way this should happen */ WARN_ON_ONCE(tmp->wb_pgbase != pos); pos += tmp->wb_bytes - (pos - tmp->wb_pgbase); } } while (tmp && pos < len); nfs_page_group_unlock(req); WARN_ON_ONCE(pos > len); return pos == len; } |
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/* We can set the PG_uptodate flag if we see that a write request * covers the full page. */ |
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static void nfs_mark_uptodate(struct nfs_page *req) |
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{ |
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if (PageUptodate(req->wb_page)) |
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return; |
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if (!nfs_page_group_covers_page(req)) |
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return; |
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SetPageUptodate(req->wb_page); |
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} |
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static int wb_priority(struct writeback_control *wbc) { |
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int ret = 0; |
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|
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if (wbc->sync_mode == WB_SYNC_ALL) ret = FLUSH_COND_STABLE; |
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return ret; |
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} /* |
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* NFS congestion control */ int nfs_congestion_kb; #define NFS_CONGESTION_ON_THRESH (nfs_congestion_kb >> (PAGE_SHIFT-10)) #define NFS_CONGESTION_OFF_THRESH \ (NFS_CONGESTION_ON_THRESH - (NFS_CONGESTION_ON_THRESH >> 2)) |
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static void nfs_set_page_writeback(struct page *page) |
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{ |
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struct nfs_server *nfss = NFS_SERVER(page_file_mapping(page)->host); |
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int ret = test_set_page_writeback(page); |
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WARN_ON_ONCE(ret != 0); |
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|
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if (atomic_long_inc_return(&nfss->writeback) > NFS_CONGESTION_ON_THRESH) { set_bdi_congested(&nfss->backing_dev_info, BLK_RW_ASYNC); |
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} } |
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static void nfs_end_page_writeback(struct nfs_page *req) |
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{ |
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struct inode *inode = page_file_mapping(req->wb_page)->host; |
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struct nfs_server *nfss = NFS_SERVER(inode); |
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if (!nfs_page_group_sync_on_bit(req, PG_WB_END)) return; end_page_writeback(req->wb_page); |
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if (atomic_long_dec_return(&nfss->writeback) < NFS_CONGESTION_OFF_THRESH) |
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clear_bdi_congested(&nfss->backing_dev_info, BLK_RW_ASYNC); |
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} |
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/* nfs_page_group_clear_bits * @req - an nfs request * clears all page group related bits from @req */ static void nfs_page_group_clear_bits(struct nfs_page *req) { clear_bit(PG_TEARDOWN, &req->wb_flags); clear_bit(PG_UNLOCKPAGE, &req->wb_flags); clear_bit(PG_UPTODATE, &req->wb_flags); clear_bit(PG_WB_END, &req->wb_flags); clear_bit(PG_REMOVE, &req->wb_flags); } /* * nfs_unroll_locks_and_wait - unlock all newly locked reqs and wait on @req * * this is a helper function for nfs_lock_and_join_requests * * @inode - inode associated with request page group, must be holding inode lock * @head - head request of page group, must be holding head lock * @req - request that couldn't lock and needs to wait on the req bit lock * @nonblock - if true, don't actually wait * * NOTE: this must be called holding page_group bit lock and inode spin lock * and BOTH will be released before returning. * * returns 0 on success, < 0 on error. */ static int nfs_unroll_locks_and_wait(struct inode *inode, struct nfs_page *head, struct nfs_page *req, bool nonblock) __releases(&inode->i_lock) { struct nfs_page *tmp; int ret; /* relinquish all the locks successfully grabbed this run */ for (tmp = head ; tmp != req; tmp = tmp->wb_this_page) nfs_unlock_request(tmp); WARN_ON_ONCE(test_bit(PG_TEARDOWN, &req->wb_flags)); /* grab a ref on the request that will be waited on */ kref_get(&req->wb_kref); nfs_page_group_unlock(head); spin_unlock(&inode->i_lock); /* release ref from nfs_page_find_head_request_locked */ nfs_release_request(head); if (!nonblock) ret = nfs_wait_on_request(req); else ret = -EAGAIN; nfs_release_request(req); return ret; } /* * nfs_destroy_unlinked_subrequests - destroy recently unlinked subrequests * * @destroy_list - request list (using wb_this_page) terminated by @old_head * @old_head - the old head of the list * * All subrequests must be locked and removed from all lists, so at this point * they are only "active" in this function, and possibly in nfs_wait_on_request * with a reference held by some other context. */ static void nfs_destroy_unlinked_subrequests(struct nfs_page *destroy_list, struct nfs_page *old_head) { while (destroy_list) { struct nfs_page *subreq = destroy_list; destroy_list = (subreq->wb_this_page == old_head) ? NULL : subreq->wb_this_page; WARN_ON_ONCE(old_head != subreq->wb_head); /* make sure old group is not used */ subreq->wb_head = subreq; subreq->wb_this_page = subreq; |
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/* subreq is now totally disconnected from page group or any * write / commit lists. last chance to wake any waiters */ nfs_unlock_request(subreq); if (!test_bit(PG_TEARDOWN, &subreq->wb_flags)) { /* release ref on old head request */ nfs_release_request(old_head); nfs_page_group_clear_bits(subreq); /* release the PG_INODE_REF reference */ if (test_and_clear_bit(PG_INODE_REF, &subreq->wb_flags)) nfs_release_request(subreq); else WARN_ON_ONCE(1); } else { WARN_ON_ONCE(test_bit(PG_CLEAN, &subreq->wb_flags)); /* zombie requests have already released the last * reference and were waiting on the rest of the * group to complete. Since it's no longer part of a * group, simply free the request */ nfs_page_group_clear_bits(subreq); nfs_free_request(subreq); } } } /* * nfs_lock_and_join_requests - join all subreqs to the head req and return * a locked reference, cancelling any pending * operations for this page. * * @page - the page used to lookup the "page group" of nfs_page structures * @nonblock - if true, don't block waiting for request locks * * This function joins all sub requests to the head request by first * locking all requests in the group, cancelling any pending operations * and finally updating the head request to cover the whole range covered by * the (former) group. All subrequests are removed from any write or commit * lists, unlinked from the group and destroyed. * * Returns a locked, referenced pointer to the head request - which after * this call is guaranteed to be the only request associated with the page. * Returns NULL if no requests are found for @page, or a ERR_PTR if an * error was encountered. */ static struct nfs_page * nfs_lock_and_join_requests(struct page *page, bool nonblock) |
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{ |
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struct inode *inode = page_file_mapping(page)->host; |
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struct nfs_page *head, *subreq; struct nfs_page *destroy_list = NULL; unsigned int total_bytes; |
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int ret; |
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try_again: total_bytes = 0; WARN_ON_ONCE(destroy_list); |
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spin_lock(&inode->i_lock); |
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/* * A reference is taken only on the head request which acts as a * reference to the whole page group - the group will not be destroyed * until the head reference is released. */ head = nfs_page_find_head_request_locked(NFS_I(inode), page); if (!head) { |
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spin_unlock(&inode->i_lock); |
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return NULL; } |
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/* holding inode lock, so always make a non-blocking call to try the * page group lock */ |
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ret = nfs_page_group_lock(head, true); |
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if (ret < 0) { spin_unlock(&inode->i_lock); |
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if (!nonblock && ret == -EAGAIN) { nfs_page_group_lock_wait(head); nfs_release_request(head); goto try_again; } |
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nfs_release_request(head); |
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return ERR_PTR(ret); |
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} |
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/* lock each request in the page group */ |
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subreq = head; do { /* * Subrequests are always contiguous, non overlapping |
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* and in order - but may be repeated (mirrored writes). |
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*/ |
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if (subreq->wb_offset == (head->wb_offset + total_bytes)) { /* keep track of how many bytes this group covers */ total_bytes += subreq->wb_bytes; } else if (WARN_ON_ONCE(subreq->wb_offset < head->wb_offset || ((subreq->wb_offset + subreq->wb_bytes) > (head->wb_offset + total_bytes)))) { nfs_page_group_unlock(head); spin_unlock(&inode->i_lock); return ERR_PTR(-EIO); } |
d45813835 nfs: handle multi... |
465 466 467 468 469 470 471 472 473 |
if (!nfs_lock_request(subreq)) { /* releases page group bit lock and * inode spin lock and all references */ ret = nfs_unroll_locks_and_wait(inode, head, subreq, nonblock); if (ret == 0) goto try_again; |
074cc1dee NFS: Add a ->migr... |
474 |
return ERR_PTR(ret); |
d45813835 nfs: handle multi... |
475 476 477 478 479 480 481 482 483 |
} subreq = subreq->wb_this_page; } while (subreq != head); /* Now that all requests are locked, make sure they aren't on any list. * Commit list removal accounting is done after locks are dropped */ subreq = head; do { |
411a99adf nfs: clear_reques... |
484 |
nfs_clear_request_commit(subreq); |
d45813835 nfs: handle multi... |
485 486 487 488 489 490 491 492 493 494 495 496 |
subreq = subreq->wb_this_page; } while (subreq != head); /* unlink subrequests from head, destroy them later */ if (head->wb_this_page != head) { /* destroy list will be terminated by head */ destroy_list = head->wb_this_page; head->wb_this_page = head; /* change head request to cover whole range that * the former page group covered */ head->wb_bytes = total_bytes; |
e261f51f2 NFS: Make nfs_upd... |
497 |
} |
d45813835 nfs: handle multi... |
498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 |
/* * prepare head request to be added to new pgio descriptor */ nfs_page_group_clear_bits(head); /* * some part of the group was still on the inode list - otherwise * the group wouldn't be involved in async write. * grab a reference for the head request, iff it needs one. */ if (!test_and_set_bit(PG_INODE_REF, &head->wb_flags)) kref_get(&head->wb_kref); nfs_page_group_unlock(head); |
411a99adf nfs: clear_reques... |
513 |
/* drop lock to clean uprequests on destroy list */ |
587142f85 NFS: Replace NFS_... |
514 |
spin_unlock(&inode->i_lock); |
d45813835 nfs: handle multi... |
515 516 |
nfs_destroy_unlinked_subrequests(destroy_list, head); |
d45813835 nfs: handle multi... |
517 518 519 |
/* still holds ref on head from nfs_page_find_head_request_locked * and still has lock on head from lock loop */ return head; |
074cc1dee NFS: Add a ->migr... |
520 |
} |
0bcbf039f nfs: handle reque... |
521 522 523 524 525 526 527 528 |
static void nfs_write_error_remove_page(struct nfs_page *req) { nfs_unlock_request(req); nfs_end_page_writeback(req); nfs_release_request(req); generic_error_remove_page(page_file_mapping(req->wb_page), req->wb_page); } |
074cc1dee NFS: Add a ->migr... |
529 530 531 532 533 |
/* * Find an associated nfs write request, and prepare to flush it out * May return an error if the user signalled nfs_wait_on_request(). */ static int nfs_page_async_flush(struct nfs_pageio_descriptor *pgio, |
d6c843b96 nfs: only remove ... |
534 535 |
struct page *page, bool nonblock, bool launder) |
074cc1dee NFS: Add a ->migr... |
536 537 538 |
{ struct nfs_page *req; int ret = 0; |
d45813835 nfs: handle multi... |
539 |
req = nfs_lock_and_join_requests(page, nonblock); |
074cc1dee NFS: Add a ->migr... |
540 541 542 543 544 |
if (!req) goto out; ret = PTR_ERR(req); if (IS_ERR(req)) goto out; |
deed85e76 NFS: Remove BUG_O... |
545 546 |
nfs_set_page_writeback(page); WARN_ON_ONCE(test_bit(PG_CLEAN, &req->wb_flags)); |
074cc1dee NFS: Add a ->migr... |
547 |
|
deed85e76 NFS: Remove BUG_O... |
548 |
ret = 0; |
f8512ad0d nfs: don't ignore... |
549 |
if (!nfs_pageio_add_request(pgio, req)) { |
074cc1dee NFS: Add a ->migr... |
550 |
ret = pgio->pg_error; |
0bcbf039f nfs: handle reque... |
551 |
/* |
d6c843b96 nfs: only remove ... |
552 553 554 |
* Remove the problematic req upon fatal errors * in launder case, while other dirty pages can * still be around until they get flushed. |
0bcbf039f nfs: handle reque... |
555 556 557 |
*/ if (nfs_error_is_fatal(ret)) { nfs_context_set_write_error(req->wb_context, ret); |
d6c843b96 nfs: only remove ... |
558 559 560 561 |
if (launder) { nfs_write_error_remove_page(req); goto out; } |
0bcbf039f nfs: handle reque... |
562 |
} |
d6c843b96 nfs: only remove ... |
563 564 |
nfs_redirty_request(req); ret = -EAGAIN; |
40f90271a NFS: Fix up page ... |
565 566 567 |
} else nfs_add_stats(page_file_mapping(page)->host, NFSIOS_WRITEPAGES, 1); |
074cc1dee NFS: Add a ->migr... |
568 569 |
out: return ret; |
e261f51f2 NFS: Make nfs_upd... |
570 |
} |
d6c843b96 nfs: only remove ... |
571 572 |
static int nfs_do_writepage(struct page *page, struct writeback_control *wbc, struct nfs_pageio_descriptor *pgio, bool launder) |
1da177e4c Linux-2.6.12-rc2 |
573 |
{ |
cfb506e1d NFS: Ensure that ... |
574 |
int ret; |
1da177e4c Linux-2.6.12-rc2 |
575 |
|
8cd797887 mm: remove page_f... |
576 |
nfs_pageio_cond_complete(pgio, page_index(page)); |
d6c843b96 nfs: only remove ... |
577 578 |
ret = nfs_page_async_flush(pgio, page, wbc->sync_mode == WB_SYNC_NONE, launder); |
cfb506e1d NFS: Ensure that ... |
579 580 581 582 583 |
if (ret == -EAGAIN) { redirty_page_for_writepage(wbc, page); ret = 0; } return ret; |
f758c8851 NFS: Clean up nfs... |
584 |
} |
7fe7f8487 NFS: Avoid a dead... |
585 |
|
f758c8851 NFS: Clean up nfs... |
586 587 588 |
/* * Write an mmapped page to the server. */ |
d6c843b96 nfs: only remove ... |
589 590 591 |
static int nfs_writepage_locked(struct page *page, struct writeback_control *wbc, bool launder) |
f758c8851 NFS: Clean up nfs... |
592 593 |
{ struct nfs_pageio_descriptor pgio; |
40f90271a NFS: Fix up page ... |
594 |
struct inode *inode = page_file_mapping(page)->host; |
f758c8851 NFS: Clean up nfs... |
595 |
int err; |
49a70f278 NFS: Cleanup: add... |
596 |
|
40f90271a NFS: Fix up page ... |
597 |
nfs_inc_stats(inode, NFSIOS_VFSWRITEPAGE); |
811ed92ec NFS: writepage of... |
598 |
nfs_pageio_init_write(&pgio, inode, 0, |
a20c93e31 nfs: remove ->wri... |
599 |
false, &nfs_async_write_completion_ops); |
d6c843b96 nfs: only remove ... |
600 |
err = nfs_do_writepage(page, wbc, &pgio, launder); |
f758c8851 NFS: Clean up nfs... |
601 602 603 604 605 606 |
nfs_pageio_complete(&pgio); if (err < 0) return err; if (pgio.pg_error < 0) return pgio.pg_error; return 0; |
4d770ccf4 NFS: Ensure that ... |
607 608 609 610 |
} int nfs_writepage(struct page *page, struct writeback_control *wbc) { |
f758c8851 NFS: Clean up nfs... |
611 |
int ret; |
4d770ccf4 NFS: Ensure that ... |
612 |
|
d6c843b96 nfs: only remove ... |
613 |
ret = nfs_writepage_locked(page, wbc, false); |
1da177e4c Linux-2.6.12-rc2 |
614 |
unlock_page(page); |
f758c8851 NFS: Clean up nfs... |
615 616 617 618 619 620 |
return ret; } static int nfs_writepages_callback(struct page *page, struct writeback_control *wbc, void *data) { int ret; |
d6c843b96 nfs: only remove ... |
621 |
ret = nfs_do_writepage(page, wbc, data, false); |
f758c8851 NFS: Clean up nfs... |
622 623 |
unlock_page(page); return ret; |
1da177e4c Linux-2.6.12-rc2 |
624 |
} |
1da177e4c Linux-2.6.12-rc2 |
625 626 |
int nfs_writepages(struct address_space *mapping, struct writeback_control *wbc) { |
1da177e4c Linux-2.6.12-rc2 |
627 |
struct inode *inode = mapping->host; |
c63c7b051 NFS: Fix a race w... |
628 |
struct nfs_pageio_descriptor pgio; |
1da177e4c Linux-2.6.12-rc2 |
629 |
int err; |
91d5b4702 NFS: add I/O perf... |
630 |
nfs_inc_stats(inode, NFSIOS_VFSWRITEPAGES); |
a20c93e31 nfs: remove ->wri... |
631 632 |
nfs_pageio_init_write(&pgio, inode, wb_priority(wbc), false, &nfs_async_write_completion_ops); |
f758c8851 NFS: Clean up nfs... |
633 |
err = write_cache_pages(mapping, wbc, nfs_writepages_callback, &pgio); |
c63c7b051 NFS: Fix a race w... |
634 |
nfs_pageio_complete(&pgio); |
72cb77f4a NFS: Throttle pag... |
635 |
|
f758c8851 NFS: Clean up nfs... |
636 |
if (err < 0) |
72cb77f4a NFS: Throttle pag... |
637 638 639 640 |
goto out_err; err = pgio.pg_error; if (err < 0) goto out_err; |
c63c7b051 NFS: Fix a race w... |
641 |
return 0; |
72cb77f4a NFS: Throttle pag... |
642 643 |
out_err: return err; |
1da177e4c Linux-2.6.12-rc2 |
644 645 646 647 648 |
} /* * Insert a write request into an inode */ |
d6d6dc7cd NFS: remove nfs_i... |
649 |
static void nfs_inode_add_request(struct inode *inode, struct nfs_page *req) |
1da177e4c Linux-2.6.12-rc2 |
650 651 |
{ struct nfs_inode *nfsi = NFS_I(inode); |
e7d39069e NFS: Clean up nfs... |
652 |
|
2bfc6e566 nfs: add support ... |
653 |
WARN_ON_ONCE(req->wb_this_page != req); |
e7d39069e NFS: Clean up nfs... |
654 |
/* Lock the request! */ |
7ad84aa94 NFS: Clean up - s... |
655 |
nfs_lock_request(req); |
e7d39069e NFS: Clean up nfs... |
656 657 |
spin_lock(&inode->i_lock); |
cb1410c71 NFS: fix subtle c... |
658 659 |
if (!nfsi->nrequests && NFS_PROTO(inode)->have_delegation(inode, FMODE_WRITE)) |
a9a4a87a5 NFS: Use the inod... |
660 |
inode->i_version++; |
29418aa4b nfs: disable data... |
661 662 663 664 665 666 667 668 669 |
/* * Swap-space should not get truncated. Hence no need to plug the race * with invalidate/truncate. */ if (likely(!PageSwapCache(req->wb_page))) { set_bit(PG_MAPPED, &req->wb_flags); SetPagePrivate(req->wb_page); set_page_private(req->wb_page, (unsigned long)req); } |
cb1410c71 NFS: fix subtle c... |
670 |
nfsi->nrequests++; |
17089a29a nfs: mark nfs_pag... |
671 |
/* this a head request for a page group - mark it as having an |
cb1410c71 NFS: fix subtle c... |
672 673 674 |
* extra reference so sub groups can follow suit. * This flag also informs pgio layer when to bump nrequests when * adding subrequests. */ |
17089a29a nfs: mark nfs_pag... |
675 |
WARN_ON(test_and_set_bit(PG_INODE_REF, &req->wb_flags)); |
c03b40246 NFS: Convert stru... |
676 |
kref_get(&req->wb_kref); |
e7d39069e NFS: Clean up nfs... |
677 |
spin_unlock(&inode->i_lock); |
1da177e4c Linux-2.6.12-rc2 |
678 679 680 |
} /* |
89a09141d [PATCH] nfs: fix ... |
681 |
* Remove a write request from an inode |
1da177e4c Linux-2.6.12-rc2 |
682 683 684 |
*/ static void nfs_inode_remove_request(struct nfs_page *req) { |
2b0143b5c VFS: normal files... |
685 |
struct inode *inode = d_inode(req->wb_context->dentry); |
1da177e4c Linux-2.6.12-rc2 |
686 |
struct nfs_inode *nfsi = NFS_I(inode); |
20633f042 nfs: page group s... |
687 |
struct nfs_page *head; |
1da177e4c Linux-2.6.12-rc2 |
688 |
|
20633f042 nfs: page group s... |
689 690 691 692 |
if (nfs_page_group_sync_on_bit(req, PG_REMOVE)) { head = req->wb_head; spin_lock(&inode->i_lock); |
67911c8f1 NFS: Add nfs_comm... |
693 |
if (likely(head->wb_page && !PageSwapCache(head->wb_page))) { |
20633f042 nfs: page group s... |
694 695 |
set_page_private(head->wb_page, 0); ClearPagePrivate(head->wb_page); |
959054469 NFS: avoid deadlo... |
696 697 |
smp_mb__after_atomic(); wake_up_page(head->wb_page, PG_private); |
20633f042 nfs: page group s... |
698 699 |
clear_bit(PG_MAPPED, &head->wb_flags); } |
cb1410c71 NFS: fix subtle c... |
700 701 702 703 704 |
nfsi->nrequests--; spin_unlock(&inode->i_lock); } else { spin_lock(&inode->i_lock); nfsi->nrequests--; |
20633f042 nfs: page group s... |
705 |
spin_unlock(&inode->i_lock); |
29418aa4b nfs: disable data... |
706 |
} |
17089a29a nfs: mark nfs_pag... |
707 708 709 |
if (test_and_clear_bit(PG_INODE_REF, &req->wb_flags)) nfs_release_request(req); |
1da177e4c Linux-2.6.12-rc2 |
710 |
} |
61822ab5e NFS: Ensure we on... |
711 |
static void |
6d884e8fc nfs: nfs_redirty_... |
712 |
nfs_mark_request_dirty(struct nfs_page *req) |
61822ab5e NFS: Ensure we on... |
713 |
{ |
67911c8f1 NFS: Add nfs_comm... |
714 715 |
if (req->wb_page) __set_page_dirty_nobuffers(req->wb_page); |
61822ab5e NFS: Ensure we on... |
716 |
} |
3a3908c8b NFS: Fix a compil... |
717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 |
/* * nfs_page_search_commits_for_head_request_locked * * Search through commit lists on @inode for the head request for @page. * Must be called while holding the inode (which is cinfo) lock. * * Returns the head request if found, or NULL if not found. */ static struct nfs_page * nfs_page_search_commits_for_head_request_locked(struct nfs_inode *nfsi, struct page *page) { struct nfs_page *freq, *t; struct nfs_commit_info cinfo; struct inode *inode = &nfsi->vfs_inode; nfs_init_cinfo_from_inode(&cinfo, inode); /* search through pnfs commit lists */ freq = pnfs_search_commit_reqs(inode, &cinfo, page); if (freq) return freq->wb_head; /* Linearly search the commit list for the correct request */ list_for_each_entry_safe(freq, t, &cinfo.mds->list, wb_list) { if (freq->wb_page == page) return freq->wb_head; } return NULL; } |
8dd377588 NFSv4.1: Clean up... |
748 |
/** |
86d80f973 NFSv4.1/pnfs: Fix... |
749 750 751 752 753 754 755 756 757 |
* nfs_request_add_commit_list_locked - add request to a commit list * @req: pointer to a struct nfs_page * @dst: commit list head * @cinfo: holds list lock and accounting info * * This sets the PG_CLEAN bit, updates the cinfo count of * number of outstanding requests requiring a commit as well as * the MM page stats. * |
fe238e601 NFS: Save struct ... |
758 |
* The caller must hold cinfo->inode->i_lock, and the nfs_page lock. |
86d80f973 NFSv4.1/pnfs: Fix... |
759 760 761 762 763 764 765 766 767 768 769 770 |
*/ void nfs_request_add_commit_list_locked(struct nfs_page *req, struct list_head *dst, struct nfs_commit_info *cinfo) { set_bit(PG_CLEAN, &req->wb_flags); nfs_list_add_request(req, dst); cinfo->mds->ncommit++; } EXPORT_SYMBOL_GPL(nfs_request_add_commit_list_locked); /** |
8dd377588 NFSv4.1: Clean up... |
771 772 |
* nfs_request_add_commit_list - add request to a commit list * @req: pointer to a struct nfs_page |
ea2cf2282 NFS: create struc... |
773 774 |
* @dst: commit list head * @cinfo: holds list lock and accounting info |
8dd377588 NFSv4.1: Clean up... |
775 |
* |
ea2cf2282 NFS: create struc... |
776 |
* This sets the PG_CLEAN bit, updates the cinfo count of |
8dd377588 NFSv4.1: Clean up... |
777 778 779 |
* number of outstanding requests requiring a commit as well as * the MM page stats. * |
ea2cf2282 NFS: create struc... |
780 |
* The caller must _not_ hold the cinfo->lock, but must be |
8dd377588 NFSv4.1: Clean up... |
781 |
* holding the nfs_page lock. |
1da177e4c Linux-2.6.12-rc2 |
782 |
*/ |
8dd377588 NFSv4.1: Clean up... |
783 |
void |
6272dcc6b NFS: Simplify nfs... |
784 |
nfs_request_add_commit_list(struct nfs_page *req, struct nfs_commit_info *cinfo) |
1da177e4c Linux-2.6.12-rc2 |
785 |
{ |
fe238e601 NFS: Save struct ... |
786 |
spin_lock(&cinfo->inode->i_lock); |
6272dcc6b NFS: Simplify nfs... |
787 |
nfs_request_add_commit_list_locked(req, &cinfo->mds->list, cinfo); |
fe238e601 NFS: Save struct ... |
788 |
spin_unlock(&cinfo->inode->i_lock); |
67911c8f1 NFS: Add nfs_comm... |
789 790 |
if (req->wb_page) nfs_mark_page_unstable(req->wb_page, cinfo); |
1da177e4c Linux-2.6.12-rc2 |
791 |
} |
8dd377588 NFSv4.1: Clean up... |
792 793 794 795 796 |
EXPORT_SYMBOL_GPL(nfs_request_add_commit_list); /** * nfs_request_remove_commit_list - Remove request from a commit list * @req: pointer to a nfs_page |
ea2cf2282 NFS: create struc... |
797 |
* @cinfo: holds list lock and accounting info |
8dd377588 NFSv4.1: Clean up... |
798 |
* |
ea2cf2282 NFS: create struc... |
799 |
* This clears the PG_CLEAN bit, and updates the cinfo's count of |
8dd377588 NFSv4.1: Clean up... |
800 801 802 |
* number of outstanding requests requiring a commit * It does not update the MM page stats. * |
ea2cf2282 NFS: create struc... |
803 |
* The caller _must_ hold the cinfo->lock and the nfs_page lock. |
8dd377588 NFSv4.1: Clean up... |
804 805 |
*/ void |
ea2cf2282 NFS: create struc... |
806 807 |
nfs_request_remove_commit_list(struct nfs_page *req, struct nfs_commit_info *cinfo) |
8dd377588 NFSv4.1: Clean up... |
808 |
{ |
8dd377588 NFSv4.1: Clean up... |
809 810 811 |
if (!test_and_clear_bit(PG_CLEAN, &(req)->wb_flags)) return; nfs_list_remove_request(req); |
ea2cf2282 NFS: create struc... |
812 |
cinfo->mds->ncommit--; |
8dd377588 NFSv4.1: Clean up... |
813 814 |
} EXPORT_SYMBOL_GPL(nfs_request_remove_commit_list); |
ea2cf2282 NFS: create struc... |
815 816 817 |
static void nfs_init_cinfo_from_inode(struct nfs_commit_info *cinfo, struct inode *inode) { |
fe238e601 NFS: Save struct ... |
818 |
cinfo->inode = inode; |
ea2cf2282 NFS: create struc... |
819 820 |
cinfo->mds = &NFS_I(inode)->commit_info; cinfo->ds = pnfs_get_ds_info(inode); |
b359f9d09 NFS: add dreq to ... |
821 |
cinfo->dreq = NULL; |
f453a54a0 NFS: create nfs_c... |
822 |
cinfo->completion_ops = &nfs_commit_completion_ops; |
ea2cf2282 NFS: create struc... |
823 824 825 826 827 828 |
} void nfs_init_cinfo(struct nfs_commit_info *cinfo, struct inode *inode, struct nfs_direct_req *dreq) { |
1763da123 NFS: rewrite dire... |
829 830 831 832 |
if (dreq) nfs_init_cinfo_from_dreq(cinfo, dreq); else nfs_init_cinfo_from_inode(cinfo, inode); |
ea2cf2282 NFS: create struc... |
833 834 |
} EXPORT_SYMBOL_GPL(nfs_init_cinfo); |
8dd377588 NFSv4.1: Clean up... |
835 836 837 838 |
/* * Add a request to the inode's commit list. */ |
1763da123 NFS: rewrite dire... |
839 |
void |
ea2cf2282 NFS: create struc... |
840 |
nfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, |
b57ff1303 pnfs: pass ds_com... |
841 |
struct nfs_commit_info *cinfo, u32 ds_commit_idx) |
8dd377588 NFSv4.1: Clean up... |
842 |
{ |
b57ff1303 pnfs: pass ds_com... |
843 |
if (pnfs_mark_request_commit(req, lseg, cinfo, ds_commit_idx)) |
8dd377588 NFSv4.1: Clean up... |
844 |
return; |
6272dcc6b NFS: Simplify nfs... |
845 |
nfs_request_add_commit_list(req, cinfo); |
8dd377588 NFSv4.1: Clean up... |
846 |
} |
8e821cad1 NFS: clean up the... |
847 |
|
d6d6dc7cd NFS: remove nfs_i... |
848 849 850 |
static void nfs_clear_page_commit(struct page *page) { |
11fb99898 mm: move most fil... |
851 |
dec_node_page_state(page, NR_UNSTABLE_NFS); |
93f78d882 writeback: move b... |
852 853 |
dec_wb_stat(&inode_to_bdi(page_file_mapping(page)->host)->wb, WB_RECLAIMABLE); |
d6d6dc7cd NFS: remove nfs_i... |
854 |
} |
411a99adf nfs: clear_reques... |
855 |
/* Called holding inode (/cinfo) lock */ |
8dd377588 NFSv4.1: Clean up... |
856 |
static void |
e468bae97 NFS: Allow redirt... |
857 858 |
nfs_clear_request_commit(struct nfs_page *req) { |
8dd377588 NFSv4.1: Clean up... |
859 |
if (test_bit(PG_CLEAN, &req->wb_flags)) { |
2b0143b5c VFS: normal files... |
860 |
struct inode *inode = d_inode(req->wb_context->dentry); |
ea2cf2282 NFS: create struc... |
861 |
struct nfs_commit_info cinfo; |
e468bae97 NFS: Allow redirt... |
862 |
|
ea2cf2282 NFS: create struc... |
863 864 |
nfs_init_cinfo_from_inode(&cinfo, inode); if (!pnfs_clear_request_commit(req, &cinfo)) { |
ea2cf2282 NFS: create struc... |
865 |
nfs_request_remove_commit_list(req, &cinfo); |
8dd377588 NFSv4.1: Clean up... |
866 |
} |
d6d6dc7cd NFS: remove nfs_i... |
867 |
nfs_clear_page_commit(req->wb_page); |
e468bae97 NFS: Allow redirt... |
868 |
} |
e468bae97 NFS: Allow redirt... |
869 |
} |
d45f60c67 nfs: merge nfs_pg... |
870 |
int nfs_write_need_commit(struct nfs_pgio_header *hdr) |
8e821cad1 NFS: clean up the... |
871 |
{ |
c65e6254c nfs: remove unuse... |
872 |
if (hdr->verf.committed == NFS_DATA_SYNC) |
d45f60c67 nfs: merge nfs_pg... |
873 |
return hdr->lseg == NULL; |
c65e6254c nfs: remove unuse... |
874 |
return hdr->verf.committed != NFS_FILE_SYNC; |
8e821cad1 NFS: clean up the... |
875 |
} |
061ae2edb NFS: create compl... |
876 |
static void nfs_write_completion(struct nfs_pgio_header *hdr) |
8e821cad1 NFS: clean up the... |
877 |
{ |
ea2cf2282 NFS: create struc... |
878 |
struct nfs_commit_info cinfo; |
6c75dc0d4 NFS: merge _full ... |
879 880 881 882 |
unsigned long bytes = 0; if (test_bit(NFS_IOHDR_REDO, &hdr->flags)) goto out; |
ea2cf2282 NFS: create struc... |
883 |
nfs_init_cinfo_from_inode(&cinfo, hdr->inode); |
6c75dc0d4 NFS: merge _full ... |
884 885 |
while (!list_empty(&hdr->pages)) { struct nfs_page *req = nfs_list_entry(hdr->pages.next); |
6c75dc0d4 NFS: merge _full ... |
886 887 888 889 890 |
bytes += req->wb_bytes; nfs_list_remove_request(req); if (test_bit(NFS_IOHDR_ERROR, &hdr->flags) && (hdr->good_bytes < bytes)) { |
d1182b33e NFS: nfs_set_page... |
891 |
nfs_set_pageerror(req->wb_page); |
6c75dc0d4 NFS: merge _full ... |
892 893 894 |
nfs_context_set_write_error(req->wb_context, hdr->error); goto remove_req; } |
c65e6254c nfs: remove unuse... |
895 |
if (nfs_write_need_commit(hdr)) { |
f79d06f54 NFS: Move the wri... |
896 |
memcpy(&req->wb_verf, &hdr->verf.verifier, sizeof(req->wb_verf)); |
b57ff1303 pnfs: pass ds_com... |
897 |
nfs_mark_request_commit(req, hdr->lseg, &cinfo, |
a7d42ddb3 nfs: add mirrorin... |
898 |
hdr->pgio_mirror_idx); |
6c75dc0d4 NFS: merge _full ... |
899 900 901 902 903 |
goto next; } remove_req: nfs_inode_remove_request(req); next: |
1d1afcbc2 NFS: Clean up - R... |
904 |
nfs_unlock_request(req); |
20633f042 nfs: page group s... |
905 |
nfs_end_page_writeback(req); |
3aff4ebb9 NFS: Prevent a de... |
906 |
nfs_release_request(req); |
6c75dc0d4 NFS: merge _full ... |
907 908 909 |
} out: hdr->release(hdr); |
8e821cad1 NFS: clean up the... |
910 |
} |
1da177e4c Linux-2.6.12-rc2 |
911 |
|
ce59515c1 NFS: Create a com... |
912 |
unsigned long |
ea2cf2282 NFS: create struc... |
913 |
nfs_reqs_to_commit(struct nfs_commit_info *cinfo) |
fb8a1f11b NFS: cleanup - re... |
914 |
{ |
ea2cf2282 NFS: create struc... |
915 |
return cinfo->mds->ncommit; |
d6d6dc7cd NFS: remove nfs_i... |
916 |
} |
fe238e601 NFS: Save struct ... |
917 |
/* cinfo->inode->i_lock held by caller */ |
1763da123 NFS: rewrite dire... |
918 |
int |
ea2cf2282 NFS: create struc... |
919 920 |
nfs_scan_commit_list(struct list_head *src, struct list_head *dst, struct nfs_commit_info *cinfo, int max) |
d6d6dc7cd NFS: remove nfs_i... |
921 922 923 924 925 |
{ struct nfs_page *req, *tmp; int ret = 0; list_for_each_entry_safe(req, tmp, src, wb_list) { |
8dd377588 NFSv4.1: Clean up... |
926 927 |
if (!nfs_lock_request(req)) continue; |
7ad84aa94 NFS: Clean up - s... |
928 |
kref_get(&req->wb_kref); |
fe238e601 NFS: Save struct ... |
929 |
if (cond_resched_lock(&cinfo->inode->i_lock)) |
3b3be88d6 NFS: Use cond_res... |
930 |
list_safe_reset_next(req, tmp, wb_list); |
ea2cf2282 NFS: create struc... |
931 |
nfs_request_remove_commit_list(req, cinfo); |
8dd377588 NFSv4.1: Clean up... |
932 933 |
nfs_list_add_request(req, dst); ret++; |
1763da123 NFS: rewrite dire... |
934 |
if ((ret == max) && !cinfo->dreq) |
8dd377588 NFSv4.1: Clean up... |
935 |
break; |
d6d6dc7cd NFS: remove nfs_i... |
936 937 |
} return ret; |
fb8a1f11b NFS: cleanup - re... |
938 |
} |
1da177e4c Linux-2.6.12-rc2 |
939 940 941 |
/* * nfs_scan_commit - Scan an inode for commit requests * @inode: NFS inode to scan |
ea2cf2282 NFS: create struc... |
942 943 |
* @dst: mds destination list * @cinfo: mds and ds lists of reqs ready to commit |
1da177e4c Linux-2.6.12-rc2 |
944 945 946 947 |
* * Moves requests from the inode's 'commit' request list. * The requests are *not* checked to ensure that they form a contiguous set. */ |
1763da123 NFS: rewrite dire... |
948 |
int |
ea2cf2282 NFS: create struc... |
949 950 |
nfs_scan_commit(struct inode *inode, struct list_head *dst, struct nfs_commit_info *cinfo) |
1da177e4c Linux-2.6.12-rc2 |
951 |
{ |
d6d6dc7cd NFS: remove nfs_i... |
952 |
int ret = 0; |
fb8a1f11b NFS: cleanup - re... |
953 |
|
fe238e601 NFS: Save struct ... |
954 |
spin_lock(&cinfo->inode->i_lock); |
ea2cf2282 NFS: create struc... |
955 |
if (cinfo->mds->ncommit > 0) { |
8dd377588 NFSv4.1: Clean up... |
956 |
const int max = INT_MAX; |
d6d6dc7cd NFS: remove nfs_i... |
957 |
|
ea2cf2282 NFS: create struc... |
958 959 960 |
ret = nfs_scan_commit_list(&cinfo->mds->list, dst, cinfo, max); ret += pnfs_scan_commit_lists(inode, cinfo, max - ret); |
d6d6dc7cd NFS: remove nfs_i... |
961 |
} |
fe238e601 NFS: Save struct ... |
962 |
spin_unlock(&cinfo->inode->i_lock); |
ff778d02b NFS: Add a count ... |
963 |
return ret; |
1da177e4c Linux-2.6.12-rc2 |
964 |
} |
d6d6dc7cd NFS: remove nfs_i... |
965 |
|
1da177e4c Linux-2.6.12-rc2 |
966 |
/* |
e7d39069e NFS: Clean up nfs... |
967 968 |
* Search for an existing write request, and attempt to update * it to reflect a new dirty region on a given page. |
1da177e4c Linux-2.6.12-rc2 |
969 |
* |
e7d39069e NFS: Clean up nfs... |
970 971 |
* If the attempt fails, then the existing request is flushed out * to disk. |
1da177e4c Linux-2.6.12-rc2 |
972 |
*/ |
e7d39069e NFS: Clean up nfs... |
973 974 975 976 |
static struct nfs_page *nfs_try_to_update_request(struct inode *inode, struct page *page, unsigned int offset, unsigned int bytes) |
1da177e4c Linux-2.6.12-rc2 |
977 |
{ |
e7d39069e NFS: Clean up nfs... |
978 979 980 981 982 983 984 |
struct nfs_page *req; unsigned int rqend; unsigned int end; int error; if (!PagePrivate(page)) return NULL; |
1da177e4c Linux-2.6.12-rc2 |
985 986 |
end = offset + bytes; |
e7d39069e NFS: Clean up nfs... |
987 |
spin_lock(&inode->i_lock); |
1da177e4c Linux-2.6.12-rc2 |
988 |
|
1da177e4c Linux-2.6.12-rc2 |
989 |
for (;;) { |
84d3a9a91 nfs: change find_... |
990 |
req = nfs_page_find_head_request_locked(NFS_I(inode), page); |
e7d39069e NFS: Clean up nfs... |
991 992 |
if (req == NULL) goto out_unlock; |
2bfc6e566 nfs: add support ... |
993 994 995 |
/* should be handled by nfs_flush_incompatible */ WARN_ON_ONCE(req->wb_head != req); WARN_ON_ONCE(req->wb_this_page != req); |
e7d39069e NFS: Clean up nfs... |
996 997 998 999 1000 1001 1002 |
rqend = req->wb_offset + req->wb_bytes; /* * Tell the caller to flush out the request if * the offsets are non-contiguous. * Note: nfs_flush_incompatible() will already * have flushed out requests having wrong owners. */ |
e468bae97 NFS: Allow redirt... |
1003 |
if (offset > rqend |
e7d39069e NFS: Clean up nfs... |
1004 1005 |
|| end < req->wb_offset) goto out_flushme; |
7ad84aa94 NFS: Clean up - s... |
1006 |
if (nfs_lock_request(req)) |
1da177e4c Linux-2.6.12-rc2 |
1007 |
break; |
1da177e4c Linux-2.6.12-rc2 |
1008 |
|
e7d39069e NFS: Clean up nfs... |
1009 |
/* The request is locked, so wait and then retry */ |
587142f85 NFS: Replace NFS_... |
1010 |
spin_unlock(&inode->i_lock); |
e7d39069e NFS: Clean up nfs... |
1011 1012 1013 1014 1015 |
error = nfs_wait_on_request(req); nfs_release_request(req); if (error != 0) goto out_err; spin_lock(&inode->i_lock); |
1da177e4c Linux-2.6.12-rc2 |
1016 1017 1018 1019 1020 1021 |
} /* Okay, the request matches. Update the region */ if (offset < req->wb_offset) { req->wb_offset = offset; req->wb_pgbase = offset; |
1da177e4c Linux-2.6.12-rc2 |
1022 |
} |
1da177e4c Linux-2.6.12-rc2 |
1023 1024 |
if (end > rqend) req->wb_bytes = end - req->wb_offset; |
e7d39069e NFS: Clean up nfs... |
1025 1026 1027 |
else req->wb_bytes = rqend - req->wb_offset; out_unlock: |
ca138f368 NFS: check for re... |
1028 1029 |
if (req) nfs_clear_request_commit(req); |
411a99adf nfs: clear_reques... |
1030 |
spin_unlock(&inode->i_lock); |
e7d39069e NFS: Clean up nfs... |
1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 |
return req; out_flushme: spin_unlock(&inode->i_lock); nfs_release_request(req); error = nfs_wb_page(inode, page); out_err: return ERR_PTR(error); } /* * Try to update an existing write request, or create one if there is none. * * Note: Should always be called with the Page Lock held to prevent races * if we have to add a new request. Also assumes that the caller has * already called nfs_flush_incompatible() if necessary. */ static struct nfs_page * nfs_setup_write_request(struct nfs_open_context* ctx, struct page *page, unsigned int offset, unsigned int bytes) { |
d56b4ddf7 nfs: teach the NF... |
1050 |
struct inode *inode = page_file_mapping(page)->host; |
e7d39069e NFS: Clean up nfs... |
1051 |
struct nfs_page *req; |
1da177e4c Linux-2.6.12-rc2 |
1052 |
|
e7d39069e NFS: Clean up nfs... |
1053 1054 1055 |
req = nfs_try_to_update_request(inode, page, offset, bytes); if (req != NULL) goto out; |
2bfc6e566 nfs: add support ... |
1056 |
req = nfs_create_request(ctx, page, NULL, offset, bytes); |
e7d39069e NFS: Clean up nfs... |
1057 1058 |
if (IS_ERR(req)) goto out; |
d6d6dc7cd NFS: remove nfs_i... |
1059 |
nfs_inode_add_request(inode, req); |
efc91ed01 NFS: Optimise app... |
1060 |
out: |
61e930a90 NFS: Fix a writeb... |
1061 |
return req; |
1da177e4c Linux-2.6.12-rc2 |
1062 |
} |
e7d39069e NFS: Clean up nfs... |
1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 |
static int nfs_writepage_setup(struct nfs_open_context *ctx, struct page *page, unsigned int offset, unsigned int count) { struct nfs_page *req; req = nfs_setup_write_request(ctx, page, offset, count); if (IS_ERR(req)) return PTR_ERR(req); /* Update file length */ nfs_grow_file(page, offset, count); |
d72ddcbab nfs: page group s... |
1073 |
nfs_mark_uptodate(req); |
a6305ddb0 NFS: Fix a race w... |
1074 |
nfs_mark_request_dirty(req); |
1d1afcbc2 NFS: Clean up - R... |
1075 |
nfs_unlock_and_release_request(req); |
e7d39069e NFS: Clean up nfs... |
1076 1077 |
return 0; } |
1da177e4c Linux-2.6.12-rc2 |
1078 1079 |
int nfs_flush_incompatible(struct file *file, struct page *page) { |
cd3758e37 NFS: Replace file... |
1080 |
struct nfs_open_context *ctx = nfs_file_open_context(file); |
2a369153c NFS: Clean up hel... |
1081 |
struct nfs_lock_context *l_ctx; |
bd61e0a9c locks: convert po... |
1082 |
struct file_lock_context *flctx = file_inode(file)->i_flctx; |
1da177e4c Linux-2.6.12-rc2 |
1083 |
struct nfs_page *req; |
1a54533ec NFS: Add nfs_set_... |
1084 |
int do_flush, status; |
1da177e4c Linux-2.6.12-rc2 |
1085 1086 1087 1088 1089 1090 1091 1092 |
/* * Look for a request corresponding to this page. If there * is one, and it belongs to another file, we flush it out * before we try to copy anything into the page. Do this * due to the lack of an ACCESS-type call in NFSv2. * Also do the same if we find a request from an existing * dropped page. */ |
1a54533ec NFS: Add nfs_set_... |
1093 |
do { |
84d3a9a91 nfs: change find_... |
1094 |
req = nfs_page_find_head_request(page); |
1a54533ec NFS: Add nfs_set_... |
1095 1096 |
if (req == NULL) return 0; |
2a369153c NFS: Clean up hel... |
1097 |
l_ctx = req->wb_lock_context; |
138a2935d NFS: Relax requir... |
1098 1099 |
do_flush = req->wb_page != page || !nfs_match_open_context(req->wb_context, ctx); |
2bfc6e566 nfs: add support ... |
1100 1101 |
/* for now, flush if more than 1 request in page_group */ do_flush |= req->wb_this_page != req; |
bd61e0a9c locks: convert po... |
1102 1103 1104 |
if (l_ctx && flctx && !(list_empty_careful(&flctx->flc_posix) && list_empty_careful(&flctx->flc_flock))) { |
d51fdb87a NFS: discard nfs_... |
1105 |
do_flush |= l_ctx->lockowner != current->files; |
5263e31e4 locks: move flock... |
1106 |
} |
1da177e4c Linux-2.6.12-rc2 |
1107 |
nfs_release_request(req); |
1a54533ec NFS: Add nfs_set_... |
1108 1109 |
if (!do_flush) return 0; |
d56b4ddf7 nfs: teach the NF... |
1110 |
status = nfs_wb_page(page_file_mapping(page)->host, page); |
1a54533ec NFS: Add nfs_set_... |
1111 1112 |
} while (status == 0); return status; |
1da177e4c Linux-2.6.12-rc2 |
1113 1114 1115 |
} /* |
dc24826bf NFS avoid expired... |
1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 |
* Avoid buffered writes when a open context credential's key would * expire soon. * * Returns -EACCES if the key will expire within RPC_KEY_EXPIRE_FAIL. * * Return 0 and set a credential flag which triggers the inode to flush * and performs NFS_FILE_SYNC writes if the key will expired within * RPC_KEY_EXPIRE_TIMEO. */ int nfs_key_timeout_notify(struct file *filp, struct inode *inode) { struct nfs_open_context *ctx = nfs_file_open_context(filp); struct rpc_auth *auth = NFS_SERVER(inode)->client->cl_auth; return rpcauth_key_timeout_notify(auth, ctx->cred); } /* * Test if the open context credential key is marked to expire soon. */ |
ce52914eb sunrpc: move NO_C... |
1137 |
bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx, struct inode *inode) |
dc24826bf NFS avoid expired... |
1138 |
{ |
ce52914eb sunrpc: move NO_C... |
1139 1140 1141 |
struct rpc_auth *auth = NFS_SERVER(inode)->client->cl_auth; return rpcauth_cred_key_to_expire(auth, ctx->cred); |
dc24826bf NFS avoid expired... |
1142 1143 1144 |
} /* |
5d47a3560 NFS: Fix a potent... |
1145 1146 1147 1148 |
* If the page cache is marked as unsafe or invalid, then we can't rely on * the PageUptodate() flag. In this case, we will need to turn off * write optimisations that depend on the page contents being correct. */ |
8d197a568 NFS: Always trust... |
1149 |
static bool nfs_write_pageuptodate(struct page *page, struct inode *inode) |
5d47a3560 NFS: Fix a potent... |
1150 |
{ |
d529ef83c NFS: fix the hand... |
1151 |
struct nfs_inode *nfsi = NFS_I(inode); |
8d197a568 NFS: Always trust... |
1152 1153 |
if (nfs_have_delegated_attributes(inode)) goto out; |
18dd78c42 nfs: Fix cache_va... |
1154 |
if (nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) |
d529ef83c NFS: fix the hand... |
1155 |
return false; |
4db72b40f nfs: add memory b... |
1156 |
smp_rmb(); |
d529ef83c NFS: fix the hand... |
1157 |
if (test_bit(NFS_INO_INVALIDATING, &nfsi->flags)) |
8d197a568 NFS: Always trust... |
1158 1159 |
return false; out: |
18dd78c42 nfs: Fix cache_va... |
1160 1161 |
if (nfsi->cache_validity & NFS_INO_INVALID_DATA) return false; |
8d197a568 NFS: Always trust... |
1162 |
return PageUptodate(page) != 0; |
5d47a3560 NFS: Fix a potent... |
1163 |
} |
5263e31e4 locks: move flock... |
1164 1165 1166 1167 1168 1169 |
static bool is_whole_file_wrlock(struct file_lock *fl) { return fl->fl_start == 0 && fl->fl_end == OFFSET_MAX && fl->fl_type == F_WRLCK; } |
c7559663e NFS: Allow nfs_up... |
1170 1171 1172 1173 1174 |
/* If we know the page is up to date, and we're not using byte range locks (or * if we have the whole file locked for writing), it may be more efficient to * extend the write to cover the entire page in order to avoid fragmentation * inefficiencies. * |
263b4509e nfs: always make ... |
1175 1176 |
* If the file is opened for synchronous writes then we can just skip the rest * of the checks. |
c7559663e NFS: Allow nfs_up... |
1177 1178 1179 |
*/ static int nfs_can_extend_write(struct file *file, struct page *page, struct inode *inode) { |
5263e31e4 locks: move flock... |
1180 1181 1182 |
int ret; struct file_lock_context *flctx = inode->i_flctx; struct file_lock *fl; |
c7559663e NFS: Allow nfs_up... |
1183 1184 |
if (file->f_flags & O_DSYNC) return 0; |
263b4509e nfs: always make ... |
1185 1186 |
if (!nfs_write_pageuptodate(page, inode)) return 0; |
c7559663e NFS: Allow nfs_up... |
1187 1188 |
if (NFS_PROTO(inode)->have_delegation(inode, FMODE_WRITE)) return 1; |
bd61e0a9c locks: convert po... |
1189 1190 |
if (!flctx || (list_empty_careful(&flctx->flc_flock) && list_empty_careful(&flctx->flc_posix))) |
8fa4592a1 NFS: Fix a write ... |
1191 |
return 1; |
5263e31e4 locks: move flock... |
1192 1193 |
/* Check to see if there are whole file write locks */ |
5263e31e4 locks: move flock... |
1194 |
ret = 0; |
6109c8503 locks: add a dedi... |
1195 |
spin_lock(&flctx->flc_lock); |
bd61e0a9c locks: convert po... |
1196 1197 1198 1199 1200 1201 |
if (!list_empty(&flctx->flc_posix)) { fl = list_first_entry(&flctx->flc_posix, struct file_lock, fl_list); if (is_whole_file_wrlock(fl)) ret = 1; } else if (!list_empty(&flctx->flc_flock)) { |
5263e31e4 locks: move flock... |
1202 1203 1204 1205 1206 |
fl = list_first_entry(&flctx->flc_flock, struct file_lock, fl_list); if (fl->fl_type == F_WRLCK) ret = 1; } |
6109c8503 locks: add a dedi... |
1207 |
spin_unlock(&flctx->flc_lock); |
5263e31e4 locks: move flock... |
1208 |
return ret; |
c7559663e NFS: Allow nfs_up... |
1209 |
} |
5d47a3560 NFS: Fix a potent... |
1210 |
/* |
1da177e4c Linux-2.6.12-rc2 |
1211 1212 1213 1214 1215 1216 1217 1218 |
* Update and possibly write a cached page of an NFS file. * * XXX: Keep an eye on generic_file_read to make sure it doesn't do bad * things with a page scheduled for an RPC call (e.g. invalidate it). */ int nfs_updatepage(struct file *file, struct page *page, unsigned int offset, unsigned int count) { |
cd3758e37 NFS: Replace file... |
1219 |
struct nfs_open_context *ctx = nfs_file_open_context(file); |
d56b4ddf7 nfs: teach the NF... |
1220 |
struct inode *inode = page_file_mapping(page)->host; |
1da177e4c Linux-2.6.12-rc2 |
1221 |
int status = 0; |
91d5b4702 NFS: add I/O perf... |
1222 |
nfs_inc_stats(inode, NFSIOS_VFSUPDATEPAGE); |
6de1472f1 nfs: use %p[dD] i... |
1223 1224 1225 |
dprintk("NFS: nfs_updatepage(%pD2 %d@%lld) ", file, count, (long long)(page_file_offset(page) + offset)); |
1da177e4c Linux-2.6.12-rc2 |
1226 |
|
149a4fddd nfs: don't create... |
1227 1228 |
if (!count) goto out; |
c7559663e NFS: Allow nfs_up... |
1229 |
if (nfs_can_extend_write(file, page, inode)) { |
49a70f278 NFS: Cleanup: add... |
1230 |
count = max(count + offset, nfs_page_length(page)); |
1da177e4c Linux-2.6.12-rc2 |
1231 |
offset = 0; |
1da177e4c Linux-2.6.12-rc2 |
1232 |
} |
e21195a74 NFS: More cleanup... |
1233 |
status = nfs_writepage_setup(ctx, page, offset, count); |
03fa9e84e NFS: nfs_updatepa... |
1234 1235 |
if (status < 0) nfs_set_pageerror(page); |
59b7c05ff Revert "NFS: Ensu... |
1236 1237 |
else __set_page_dirty_nobuffers(page); |
149a4fddd nfs: don't create... |
1238 |
out: |
48186c7d5 NFS: Fix trace de... |
1239 1240 |
dprintk("NFS: nfs_updatepage returns %d (isize %lld) ", |
1da177e4c Linux-2.6.12-rc2 |
1241 |
status, (long long)i_size_read(inode)); |
1da177e4c Linux-2.6.12-rc2 |
1242 1243 |
return status; } |
3ff7576dd SUNRPC: Clean up ... |
1244 |
static int flush_task_priority(int how) |
1da177e4c Linux-2.6.12-rc2 |
1245 1246 1247 1248 1249 1250 1251 1252 1253 |
{ switch (how & (FLUSH_HIGHPRI|FLUSH_LOWPRI)) { case FLUSH_HIGHPRI: return RPC_PRIORITY_HIGH; case FLUSH_LOWPRI: return RPC_PRIORITY_LOW; } return RPC_PRIORITY_NORMAL; } |
d45f60c67 nfs: merge nfs_pg... |
1254 1255 |
static void nfs_initiate_write(struct nfs_pgio_header *hdr, struct rpc_message *msg, |
abde71f4d pnfs: Add nfs_rpc... |
1256 |
const struct nfs_rpc_ops *rpc_ops, |
1ed26f330 NFS: Create a com... |
1257 |
struct rpc_task_setup *task_setup_data, int how) |
1da177e4c Linux-2.6.12-rc2 |
1258 |
{ |
3ff7576dd SUNRPC: Clean up ... |
1259 |
int priority = flush_task_priority(how); |
d138d5d17 NFSv4.1: rearrang... |
1260 |
|
1ed26f330 NFS: Create a com... |
1261 |
task_setup_data->priority = priority; |
abde71f4d pnfs: Add nfs_rpc... |
1262 |
rpc_ops->write_setup(hdr, msg); |
d138d5d17 NFSv4.1: rearrang... |
1263 |
|
abde71f4d pnfs: Add nfs_rpc... |
1264 |
nfs4_state_protect_write(NFS_SERVER(hdr->inode)->nfs_client, |
d45f60c67 nfs: merge nfs_pg... |
1265 |
&task_setup_data->rpc_client, msg, hdr); |
275acaafd NFS: Clean up: sp... |
1266 |
} |
6d884e8fc nfs: nfs_redirty_... |
1267 1268 1269 1270 1271 1272 1273 |
/* If a nfs_flush_* function fails, it should remove reqs from @head and * call this on each, which will prepare them to be retried on next * writeback using standard nfs. */ static void nfs_redirty_request(struct nfs_page *req) { nfs_mark_request_dirty(req); |
c70701131 NFS: Ensure we se... |
1274 |
set_bit(NFS_CONTEXT_RESEND_WRITES, &req->wb_context->flags); |
1d1afcbc2 NFS: Clean up - R... |
1275 |
nfs_unlock_request(req); |
20633f042 nfs: page group s... |
1276 |
nfs_end_page_writeback(req); |
3aff4ebb9 NFS: Prevent a de... |
1277 |
nfs_release_request(req); |
6d884e8fc nfs: nfs_redirty_... |
1278 |
} |
061ae2edb NFS: create compl... |
1279 |
static void nfs_async_write_error(struct list_head *head) |
6c75dc0d4 NFS: merge _full ... |
1280 1281 1282 1283 1284 1285 1286 1287 1288 |
{ struct nfs_page *req; while (!list_empty(head)) { req = nfs_list_entry(head->next); nfs_list_remove_request(req); nfs_redirty_request(req); } } |
dc602dd70 NFS/pNFS: Fix up ... |
1289 1290 1291 1292 |
static void nfs_async_write_reschedule_io(struct nfs_pgio_header *hdr) { nfs_async_write_error(&hdr->pages); } |
061ae2edb NFS: create compl... |
1293 1294 1295 |
static const struct nfs_pgio_completion_ops nfs_async_write_completion_ops = { .error_cleanup = nfs_async_write_error, .completion = nfs_write_completion, |
dc602dd70 NFS/pNFS: Fix up ... |
1296 |
.reschedule_io = nfs_async_write_reschedule_io, |
061ae2edb NFS: create compl... |
1297 |
}; |
57208fa7e NFS: Create an wr... |
1298 |
void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, |
a20c93e31 nfs: remove ->wri... |
1299 |
struct inode *inode, int ioflags, bool force_mds, |
061ae2edb NFS: create compl... |
1300 |
const struct nfs_pgio_completion_ops *compl_ops) |
1da177e4c Linux-2.6.12-rc2 |
1301 |
{ |
a20c93e31 nfs: remove ->wri... |
1302 |
struct nfs_server *server = NFS_SERVER(inode); |
41d8d5b7a NFS: Create a com... |
1303 |
const struct nfs_pageio_ops *pg_ops = &nfs_pgio_rw_ops; |
a20c93e31 nfs: remove ->wri... |
1304 1305 1306 1307 1308 |
#ifdef CONFIG_NFS_V4_1 if (server->pnfs_curr_ld && !force_mds) pg_ops = server->pnfs_curr_ld->pg_write_ops; #endif |
4a0de55c5 NFS: Create a com... |
1309 1310 |
nfs_pageio_init(pgio, inode, pg_ops, compl_ops, &nfs_rw_write_ops, server->wsize, ioflags); |
1751c3638 NFS: Cleanup of t... |
1311 |
} |
ddda8e0aa NFS: Convert v2 i... |
1312 |
EXPORT_SYMBOL_GPL(nfs_pageio_init_write); |
1da177e4c Linux-2.6.12-rc2 |
1313 |
|
dce81290e NFS: Move the pnf... |
1314 1315 |
void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio) { |
a7d42ddb3 nfs: add mirrorin... |
1316 |
struct nfs_pgio_mirror *mirror; |
6f29b9bba NFS: Do cleanup b... |
1317 1318 |
if (pgio->pg_ops && pgio->pg_ops->pg_cleanup) pgio->pg_ops->pg_cleanup(pgio); |
41d8d5b7a NFS: Create a com... |
1319 |
pgio->pg_ops = &nfs_pgio_rw_ops; |
a7d42ddb3 nfs: add mirrorin... |
1320 1321 1322 1323 1324 |
nfs_pageio_stop_mirroring(pgio); mirror = &pgio->pg_mirrors[0]; mirror->pg_bsize = NFS_SERVER(pgio->pg_inode)->wsize; |
dce81290e NFS: Move the pnf... |
1325 |
} |
1f9453578 NFS: Clean up - s... |
1326 |
EXPORT_SYMBOL_GPL(nfs_pageio_reset_write_mds); |
dce81290e NFS: Move the pnf... |
1327 |
|
1da177e4c Linux-2.6.12-rc2 |
1328 |
|
0b7c01533 NFS: add a struct... |
1329 1330 1331 1332 1333 1334 |
void nfs_commit_prepare(struct rpc_task *task, void *calldata) { struct nfs_commit_data *data = calldata; NFS_PROTO(data->inode)->commit_rpc_prepare(task, data); } |
1f2edbe3f NFS: Don't ignore... |
1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 |
/* * Special version of should_remove_suid() that ignores capabilities. */ static int nfs_should_remove_suid(const struct inode *inode) { umode_t mode = inode->i_mode; int kill = 0; /* suid always must be killed */ if (unlikely(mode & S_ISUID)) kill = ATTR_KILL_SUID; |
788e7a89a NFS: Cleanup of N... |
1346 |
|
1f2edbe3f NFS: Don't ignore... |
1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 |
/* * sgid without any exec bits is just a mandatory locking mark; leave * it alone. If some exec bits are set, it's a real sgid; kill it. */ if (unlikely((mode & S_ISGID) && (mode & S_IXGRP))) kill |= ATTR_KILL_SGID; if (unlikely(kill && S_ISREG(mode))) return kill; return 0; } |
788e7a89a NFS: Cleanup of N... |
1359 |
|
a08a8cd37 NFS: Add attribut... |
1360 1361 1362 1363 1364 |
static void nfs_writeback_check_extend(struct nfs_pgio_header *hdr, struct nfs_fattr *fattr) { struct nfs_pgio_args *argp = &hdr->args; struct nfs_pgio_res *resp = &hdr->res; |
2b83d3de4 NFSv4/pnfs: Ensur... |
1365 |
u64 size = argp->offset + resp->count; |
a08a8cd37 NFS: Add attribut... |
1366 1367 |
if (!(fattr->valid & NFS_ATTR_FATTR_SIZE)) |
2b83d3de4 NFSv4/pnfs: Ensur... |
1368 1369 1370 |
fattr->size = size; if (nfs_size_to_loff_t(fattr->size) < i_size_read(hdr->inode)) { fattr->valid &= ~NFS_ATTR_FATTR_SIZE; |
a08a8cd37 NFS: Add attribut... |
1371 |
return; |
2b83d3de4 NFSv4/pnfs: Ensur... |
1372 1373 |
} if (size != fattr->size) |
a08a8cd37 NFS: Add attribut... |
1374 1375 1376 |
return; /* Set attribute barrier */ nfs_fattr_set_barrier(fattr); |
2b83d3de4 NFSv4/pnfs: Ensur... |
1377 1378 |
/* ...and update size */ fattr->valid |= NFS_ATTR_FATTR_SIZE; |
a08a8cd37 NFS: Add attribut... |
1379 1380 1381 1382 |
} void nfs_writeback_update_inode(struct nfs_pgio_header *hdr) { |
2b83d3de4 NFSv4/pnfs: Ensur... |
1383 |
struct nfs_fattr *fattr = &hdr->fattr; |
a08a8cd37 NFS: Add attribut... |
1384 |
struct inode *inode = hdr->inode; |
a08a8cd37 NFS: Add attribut... |
1385 1386 1387 1388 1389 1390 |
spin_lock(&inode->i_lock); nfs_writeback_check_extend(hdr, fattr); nfs_post_op_update_inode_force_wcc_locked(inode, fattr); spin_unlock(&inode->i_lock); } EXPORT_SYMBOL_GPL(nfs_writeback_update_inode); |
1da177e4c Linux-2.6.12-rc2 |
1391 1392 1393 |
/* * This function is called when the WRITE call is complete. */ |
d45f60c67 nfs: merge nfs_pg... |
1394 1395 |
static int nfs_writeback_done(struct rpc_task *task, struct nfs_pgio_header *hdr, |
0eecb2145 NFS: Create a com... |
1396 |
struct inode *inode) |
1da177e4c Linux-2.6.12-rc2 |
1397 |
{ |
788e7a89a NFS: Cleanup of N... |
1398 |
int status; |
1da177e4c Linux-2.6.12-rc2 |
1399 |
|
f551e44ff NFS: add comments... |
1400 1401 1402 1403 1404 1405 1406 |
/* * ->write_done will attempt to use post-op attributes to detect * conflicting writes by other clients. A strict interpretation * of close-to-open would allow us to continue caching even if * another writer had changed the file, but some applications * depend on tighter cache coherency when writing. */ |
d45f60c67 nfs: merge nfs_pg... |
1407 |
status = NFS_PROTO(inode)->write_done(task, hdr); |
788e7a89a NFS: Cleanup of N... |
1408 |
if (status != 0) |
0eecb2145 NFS: Create a com... |
1409 |
return status; |
d45f60c67 nfs: merge nfs_pg... |
1410 |
nfs_add_stats(inode, NFSIOS_SERVERWRITTENBYTES, hdr->res.count); |
91d5b4702 NFS: add I/O perf... |
1411 |
|
d45f60c67 nfs: merge nfs_pg... |
1412 1413 |
if (hdr->res.verf->committed < hdr->args.stable && task->tk_status >= 0) { |
1da177e4c Linux-2.6.12-rc2 |
1414 1415 1416 1417 1418 1419 1420 1421 1422 |
/* We tried a write call, but the server did not * commit data to stable storage even though we * requested it. * Note: There is a known bug in Tru64 < 5.0 in which * the server reports NFS_DATA_SYNC, but performs * NFS_FILE_SYNC. We therefore implement this checking * as a dprintk() in order to avoid filling syslog. */ static unsigned long complain; |
a69aef149 NFSv4.1: pnfs fil... |
1423 |
/* Note this will print the MDS for a DS write */ |
1da177e4c Linux-2.6.12-rc2 |
1424 |
if (time_before(complain, jiffies)) { |
48186c7d5 NFS: Fix trace de... |
1425 |
dprintk("NFS: faulty NFS server %s:" |
1da177e4c Linux-2.6.12-rc2 |
1426 1427 |
" (committed = %d) != (stable = %d) ", |
cd841605f NFS: create commo... |
1428 |
NFS_SERVER(inode)->nfs_client->cl_hostname, |
d45f60c67 nfs: merge nfs_pg... |
1429 |
hdr->res.verf->committed, hdr->args.stable); |
1da177e4c Linux-2.6.12-rc2 |
1430 1431 1432 |
complain = jiffies + 300 * HZ; } } |
1f2edbe3f NFS: Don't ignore... |
1433 1434 1435 1436 |
/* Deal with the suid/sgid bit corner case */ if (nfs_should_remove_suid(inode)) nfs_mark_for_revalidate(inode); |
0eecb2145 NFS: Create a com... |
1437 1438 1439 1440 1441 1442 |
return 0; } /* * This function is called when the WRITE call is complete. */ |
d45f60c67 nfs: merge nfs_pg... |
1443 1444 |
static void nfs_writeback_result(struct rpc_task *task, struct nfs_pgio_header *hdr) |
0eecb2145 NFS: Create a com... |
1445 |
{ |
d45f60c67 nfs: merge nfs_pg... |
1446 1447 |
struct nfs_pgio_args *argp = &hdr->args; struct nfs_pgio_res *resp = &hdr->res; |
1f2edbe3f NFS: Don't ignore... |
1448 1449 |
if (resp->count < argp->count) { |
1da177e4c Linux-2.6.12-rc2 |
1450 |
static unsigned long complain; |
6c75dc0d4 NFS: merge _full ... |
1451 |
/* This a short write! */ |
d45f60c67 nfs: merge nfs_pg... |
1452 |
nfs_inc_stats(hdr->inode, NFSIOS_SHORTWRITE); |
91d5b4702 NFS: add I/O perf... |
1453 |
|
1da177e4c Linux-2.6.12-rc2 |
1454 |
/* Has the server at least made some progress? */ |
6c75dc0d4 NFS: merge _full ... |
1455 1456 1457 1458 1459 1460 1461 |
if (resp->count == 0) { if (time_before(complain, jiffies)) { printk(KERN_WARNING "NFS: Server wrote zero bytes, expected %u. ", argp->count); complain = jiffies + 300 * HZ; |
1da177e4c Linux-2.6.12-rc2 |
1462 |
} |
d45f60c67 nfs: merge nfs_pg... |
1463 |
nfs_set_pgio_error(hdr, -EIO, argp->offset); |
6c75dc0d4 NFS: merge _full ... |
1464 |
task->tk_status = -EIO; |
136028967 NFS: change nfs_w... |
1465 |
return; |
1da177e4c Linux-2.6.12-rc2 |
1466 |
} |
f8417b481 NFSv4.1/pnfs: Ret... |
1467 1468 1469 1470 1471 1472 |
/* For non rpc-based layout drivers, retry-through-MDS */ if (!task->tk_ops) { hdr->pnfs_error = -EAGAIN; return; } |
6c75dc0d4 NFS: merge _full ... |
1473 1474 1475 |
/* Was this an NFSv2 write or an NFSv3 stable write? */ if (resp->verf->committed != NFS_UNSTABLE) { /* Resend from where the server left off */ |
d45f60c67 nfs: merge nfs_pg... |
1476 |
hdr->mds_offset += resp->count; |
6c75dc0d4 NFS: merge _full ... |
1477 1478 1479 1480 1481 1482 1483 1484 |
argp->offset += resp->count; argp->pgbase += resp->count; argp->count -= resp->count; } else { /* Resend as a stable write in order to avoid * headaches in the case of a server crash. */ argp->stable = NFS_FILE_SYNC; |
1da177e4c Linux-2.6.12-rc2 |
1485 |
} |
6c75dc0d4 NFS: merge _full ... |
1486 |
rpc_restart_call_prepare(task); |
1da177e4c Linux-2.6.12-rc2 |
1487 |
} |
1da177e4c Linux-2.6.12-rc2 |
1488 |
} |
af7cf0579 NFS: Allow multip... |
1489 |
static int wait_on_commit(struct nfs_mds_commit_info *cinfo) |
71d0a6112 NFS: Fix an unsta... |
1490 |
{ |
af7cf0579 NFS: Allow multip... |
1491 1492 1493 |
return wait_on_atomic_t(&cinfo->rpcs_out, nfs_wait_atomic_killable, TASK_KILLABLE); } |
b8413f98f NFS: Fix a hang/i... |
1494 |
|
af7cf0579 NFS: Allow multip... |
1495 1496 1497 |
static void nfs_commit_begin(struct nfs_mds_commit_info *cinfo) { atomic_inc(&cinfo->rpcs_out); |
71d0a6112 NFS: Fix an unsta... |
1498 |
} |
af7cf0579 NFS: Allow multip... |
1499 |
static void nfs_commit_end(struct nfs_mds_commit_info *cinfo) |
71d0a6112 NFS: Fix an unsta... |
1500 |
{ |
af7cf0579 NFS: Allow multip... |
1501 1502 |
if (atomic_dec_and_test(&cinfo->rpcs_out)) wake_up_atomic_t(&cinfo->rpcs_out); |
71d0a6112 NFS: Fix an unsta... |
1503 |
} |
0b7c01533 NFS: add a struct... |
1504 |
void nfs_commitdata_release(struct nfs_commit_data *data) |
1da177e4c Linux-2.6.12-rc2 |
1505 |
{ |
0b7c01533 NFS: add a struct... |
1506 1507 |
put_nfs_open_context(data->context); nfs_commit_free(data); |
1da177e4c Linux-2.6.12-rc2 |
1508 |
} |
e0c2b3801 NFSv4.1: filelayo... |
1509 |
EXPORT_SYMBOL_GPL(nfs_commitdata_release); |
1da177e4c Linux-2.6.12-rc2 |
1510 |
|
0b7c01533 NFS: add a struct... |
1511 |
int nfs_initiate_commit(struct rpc_clnt *clnt, struct nfs_commit_data *data, |
c36aae9ad nfs: allow differ... |
1512 |
const struct nfs_rpc_ops *nfs_ops, |
9ace33cdc NFSv4.1: rearrang... |
1513 |
const struct rpc_call_ops *call_ops, |
9f0ec176b NFSv4.1 set RPC_T... |
1514 |
int how, int flags) |
1da177e4c Linux-2.6.12-rc2 |
1515 |
{ |
077376919 NFS/SUNRPC: Conve... |
1516 |
struct rpc_task *task; |
9ace33cdc NFSv4.1: rearrang... |
1517 |
int priority = flush_task_priority(how); |
bdc7f021f NFS: Clean up the... |
1518 1519 1520 |
struct rpc_message msg = { .rpc_argp = &data->args, .rpc_resp = &data->res, |
9ace33cdc NFSv4.1: rearrang... |
1521 |
.rpc_cred = data->cred, |
bdc7f021f NFS: Clean up the... |
1522 |
}; |
84115e1cd SUNRPC: Cleanup o... |
1523 |
struct rpc_task_setup task_setup_data = { |
077376919 NFS/SUNRPC: Conve... |
1524 |
.task = &data->task, |
9ace33cdc NFSv4.1: rearrang... |
1525 |
.rpc_client = clnt, |
bdc7f021f NFS: Clean up the... |
1526 |
.rpc_message = &msg, |
9ace33cdc NFSv4.1: rearrang... |
1527 |
.callback_ops = call_ops, |
84115e1cd SUNRPC: Cleanup o... |
1528 |
.callback_data = data, |
101070ca2 NFS: Ensure that ... |
1529 |
.workqueue = nfsiod_workqueue, |
9f0ec176b NFSv4.1 set RPC_T... |
1530 |
.flags = RPC_TASK_ASYNC | flags, |
3ff7576dd SUNRPC: Clean up ... |
1531 |
.priority = priority, |
84115e1cd SUNRPC: Cleanup o... |
1532 |
}; |
9ace33cdc NFSv4.1: rearrang... |
1533 |
/* Set up the initial task struct. */ |
c36aae9ad nfs: allow differ... |
1534 |
nfs_ops->commit_setup(data, &msg); |
9ace33cdc NFSv4.1: rearrang... |
1535 |
|
b4839ebe2 nfs: Remove inval... |
1536 1537 |
dprintk("NFS: initiated commit call "); |
9ace33cdc NFSv4.1: rearrang... |
1538 |
|
8c21c62c4 nfs4.1: Add SP4_M... |
1539 1540 |
nfs4_state_protect(NFS_SERVER(data->inode)->nfs_client, NFS_SP4_MACH_CRED_COMMIT, &task_setup_data.rpc_client, &msg); |
9ace33cdc NFSv4.1: rearrang... |
1541 1542 1543 1544 1545 1546 1547 1548 |
task = rpc_run_task(&task_setup_data); if (IS_ERR(task)) return PTR_ERR(task); if (how & FLUSH_SYNC) rpc_wait_for_completion_task(task); rpc_put_task(task); return 0; } |
e0c2b3801 NFSv4.1: filelayo... |
1549 |
EXPORT_SYMBOL_GPL(nfs_initiate_commit); |
9ace33cdc NFSv4.1: rearrang... |
1550 |
|
378520b83 nfs41: add a help... |
1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 |
static loff_t nfs_get_lwb(struct list_head *head) { loff_t lwb = 0; struct nfs_page *req; list_for_each_entry(req, head, wb_list) if (lwb < (req_offset(req) + req->wb_bytes)) lwb = req_offset(req) + req->wb_bytes; return lwb; } |
9ace33cdc NFSv4.1: rearrang... |
1562 1563 1564 |
/* * Set up the argument/result storage required for the RPC call. */ |
0b7c01533 NFS: add a struct... |
1565 |
void nfs_init_commit(struct nfs_commit_data *data, |
f453a54a0 NFS: create nfs_c... |
1566 1567 1568 |
struct list_head *head, struct pnfs_layout_segment *lseg, struct nfs_commit_info *cinfo) |
9ace33cdc NFSv4.1: rearrang... |
1569 1570 |
{ struct nfs_page *first = nfs_list_entry(head->next); |
2b0143b5c VFS: normal files... |
1571 |
struct inode *inode = d_inode(first->wb_context->dentry); |
1da177e4c Linux-2.6.12-rc2 |
1572 1573 1574 1575 1576 |
/* Set up the RPC argument and reply structs * NB: take care not to mess about with data->commit et al. */ list_splice_init(head, &data->pages); |
1da177e4c Linux-2.6.12-rc2 |
1577 |
|
1da177e4c Linux-2.6.12-rc2 |
1578 |
data->inode = inode; |
9ace33cdc NFSv4.1: rearrang... |
1579 |
data->cred = first->wb_context->cred; |
988b6dceb NFSv4.1: remove G... |
1580 |
data->lseg = lseg; /* reference transferred */ |
378520b83 nfs41: add a help... |
1581 1582 1583 |
/* only set lwb for pnfs commit */ if (lseg) data->lwb = nfs_get_lwb(&data->pages); |
9ace33cdc NFSv4.1: rearrang... |
1584 |
data->mds_ops = &nfs_commit_ops; |
f453a54a0 NFS: create nfs_c... |
1585 |
data->completion_ops = cinfo->completion_ops; |
b359f9d09 NFS: add dreq to ... |
1586 |
data->dreq = cinfo->dreq; |
1da177e4c Linux-2.6.12-rc2 |
1587 1588 |
data->args.fh = NFS_FH(data->inode); |
3da28eb1c [PATCH] NFS: Repl... |
1589 1590 1591 |
/* Note: we always request a commit of the entire inode */ data->args.offset = 0; data->args.count = 0; |
0b7c01533 NFS: add a struct... |
1592 |
data->context = get_nfs_open_context(first->wb_context); |
1da177e4c Linux-2.6.12-rc2 |
1593 1594 |
data->res.fattr = &data->fattr; data->res.verf = &data->verf; |
0e574af1b NFS: Cleanup init... |
1595 |
nfs_fattr_init(&data->fattr); |
1da177e4c Linux-2.6.12-rc2 |
1596 |
} |
e0c2b3801 NFSv4.1: filelayo... |
1597 |
EXPORT_SYMBOL_GPL(nfs_init_commit); |
1da177e4c Linux-2.6.12-rc2 |
1598 |
|
e0c2b3801 NFSv4.1: filelayo... |
1599 |
void nfs_retry_commit(struct list_head *page_list, |
ea2cf2282 NFS: create struc... |
1600 |
struct pnfs_layout_segment *lseg, |
b57ff1303 pnfs: pass ds_com... |
1601 1602 |
struct nfs_commit_info *cinfo, u32 ds_commit_idx) |
64bfeb49b NFSv4.1: pull err... |
1603 1604 1605 1606 1607 1608 |
{ struct nfs_page *req; while (!list_empty(page_list)) { req = nfs_list_entry(page_list->next); nfs_list_remove_request(req); |
b57ff1303 pnfs: pass ds_com... |
1609 |
nfs_mark_request_commit(req, lseg, cinfo, ds_commit_idx); |
487b9b8af nfs: Can call nfs... |
1610 1611 |
if (!cinfo->dreq) nfs_clear_page_commit(req->wb_page); |
1d1afcbc2 NFS: Clean up - R... |
1612 |
nfs_unlock_and_release_request(req); |
64bfeb49b NFSv4.1: pull err... |
1613 1614 |
} } |
e0c2b3801 NFSv4.1: filelayo... |
1615 |
EXPORT_SYMBOL_GPL(nfs_retry_commit); |
64bfeb49b NFSv4.1: pull err... |
1616 |
|
b20135d0b NFSv4.1/pNFS: Don... |
1617 1618 1619 1620 1621 1622 |
static void nfs_commit_resched_write(struct nfs_commit_info *cinfo, struct nfs_page *req) { __set_page_dirty_nobuffers(req->wb_page); } |
1da177e4c Linux-2.6.12-rc2 |
1623 1624 1625 1626 |
/* * Commit dirty pages */ static int |
ea2cf2282 NFS: create struc... |
1627 1628 |
nfs_commit_list(struct inode *inode, struct list_head *head, int how, struct nfs_commit_info *cinfo) |
1da177e4c Linux-2.6.12-rc2 |
1629 |
{ |
0b7c01533 NFS: add a struct... |
1630 |
struct nfs_commit_data *data; |
1da177e4c Linux-2.6.12-rc2 |
1631 |
|
ade8febde nfs: avoid race t... |
1632 1633 1634 |
/* another commit raced with us */ if (list_empty(head)) return 0; |
c9d8f89d9 NFS: Ensure that ... |
1635 |
data = nfs_commitdata_alloc(); |
1da177e4c Linux-2.6.12-rc2 |
1636 1637 1638 1639 1640 |
if (!data) goto out_bad; /* Set up the argument struct */ |
f453a54a0 NFS: create nfs_c... |
1641 1642 |
nfs_init_commit(data, head, NULL, cinfo); atomic_inc(&cinfo->mds->rpcs_out); |
c36aae9ad nfs: allow differ... |
1643 1644 |
return nfs_initiate_commit(NFS_CLIENT(inode), data, NFS_PROTO(inode), data->mds_ops, how, 0); |
1da177e4c Linux-2.6.12-rc2 |
1645 |
out_bad: |
b57ff1303 pnfs: pass ds_com... |
1646 |
nfs_retry_commit(head, NULL, cinfo, 0); |
1da177e4c Linux-2.6.12-rc2 |
1647 1648 |
return -ENOMEM; } |
67911c8f1 NFS: Add nfs_comm... |
1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 |
int nfs_commit_file(struct file *file, struct nfs_write_verifier *verf) { struct inode *inode = file_inode(file); struct nfs_open_context *open; struct nfs_commit_info cinfo; struct nfs_page *req; int ret; open = get_nfs_open_context(nfs_file_open_context(file)); req = nfs_create_request(open, NULL, NULL, 0, i_size_read(inode)); |
2997bfd04 NFS: checking for... |
1659 1660 |
if (IS_ERR(req)) { ret = PTR_ERR(req); |
67911c8f1 NFS: Add nfs_comm... |
1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 |
goto out_put; } nfs_init_cinfo_from_inode(&cinfo, inode); memcpy(&req->wb_verf, verf, sizeof(struct nfs_write_verifier)); nfs_request_add_commit_list(req, &cinfo); ret = nfs_commit_inode(inode, FLUSH_SYNC); if (ret > 0) ret = 0; nfs_free_request(req); out_put: put_nfs_open_context(open); return ret; } EXPORT_SYMBOL_GPL(nfs_commit_file); |
1da177e4c Linux-2.6.12-rc2 |
1678 1679 1680 |
/* * COMMIT call returned */ |
788e7a89a NFS: Cleanup of N... |
1681 |
static void nfs_commit_done(struct rpc_task *task, void *calldata) |
1da177e4c Linux-2.6.12-rc2 |
1682 |
{ |
0b7c01533 NFS: add a struct... |
1683 |
struct nfs_commit_data *data = calldata; |
1da177e4c Linux-2.6.12-rc2 |
1684 |
|
a3f565b1e NFS: fix print fo... |
1685 1686 |
dprintk("NFS: %5u nfs_commit_done (status %d) ", |
1da177e4c Linux-2.6.12-rc2 |
1687 |
task->tk_pid, task->tk_status); |
788e7a89a NFS: Cleanup of N... |
1688 |
/* Call the NFS version-specific code */ |
c0d0e96b8 NFS: Get rid of p... |
1689 |
NFS_PROTO(data->inode)->commit_done(task, data); |
c9d8f89d9 NFS: Ensure that ... |
1690 |
} |
f453a54a0 NFS: create nfs_c... |
1691 |
static void nfs_commit_release_pages(struct nfs_commit_data *data) |
c9d8f89d9 NFS: Ensure that ... |
1692 |
{ |
5917ce844 NFSv4.1: pull out... |
1693 |
struct nfs_page *req; |
c9d8f89d9 NFS: Ensure that ... |
1694 |
int status = data->task.tk_status; |
f453a54a0 NFS: create nfs_c... |
1695 |
struct nfs_commit_info cinfo; |
353db7966 NFS: avoid waitin... |
1696 |
struct nfs_server *nfss; |
788e7a89a NFS: Cleanup of N... |
1697 |
|
1da177e4c Linux-2.6.12-rc2 |
1698 1699 1700 |
while (!list_empty(&data->pages)) { req = nfs_list_entry(data->pages.next); nfs_list_remove_request(req); |
67911c8f1 NFS: Add nfs_comm... |
1701 1702 |
if (req->wb_page) nfs_clear_page_commit(req->wb_page); |
1da177e4c Linux-2.6.12-rc2 |
1703 |
|
1e8968c5b NFS: dprintk() sh... |
1704 |
dprintk("NFS: commit (%s/%llu %d@%lld)", |
3d4ff43d8 nfs_open_context ... |
1705 |
req->wb_context->dentry->d_sb->s_id, |
2b0143b5c VFS: normal files... |
1706 |
(unsigned long long)NFS_FILEID(d_inode(req->wb_context->dentry)), |
1da177e4c Linux-2.6.12-rc2 |
1707 1708 |
req->wb_bytes, (long long)req_offset(req)); |
c9d8f89d9 NFS: Ensure that ... |
1709 1710 |
if (status < 0) { nfs_context_set_write_error(req->wb_context, status); |
1da177e4c Linux-2.6.12-rc2 |
1711 |
nfs_inode_remove_request(req); |
c9d8f89d9 NFS: Ensure that ... |
1712 1713 |
dprintk(", error = %d ", status); |
1da177e4c Linux-2.6.12-rc2 |
1714 1715 1716 1717 1718 |
goto next; } /* Okay, COMMIT succeeded, apparently. Check the verifier * returned by the server against all stored verfs. */ |
8fc3c3862 NFS: Fix O_DIRECT... |
1719 |
if (!nfs_write_verifier_cmp(&req->wb_verf, &data->verf.verifier)) { |
1da177e4c Linux-2.6.12-rc2 |
1720 1721 1722 1723 1724 1725 1726 1727 1728 |
/* We have a match */ nfs_inode_remove_request(req); dprintk(" OK "); goto next; } /* We have a mismatch. Write the page again */ dprintk(" mismatch "); |
6d884e8fc nfs: nfs_redirty_... |
1729 |
nfs_mark_request_dirty(req); |
05990d1bf NFS: Fix fdatasyn... |
1730 |
set_bit(NFS_CONTEXT_RESEND_WRITES, &req->wb_context->flags); |
1da177e4c Linux-2.6.12-rc2 |
1731 |
next: |
1d1afcbc2 NFS: Clean up - R... |
1732 |
nfs_unlock_and_release_request(req); |
1da177e4c Linux-2.6.12-rc2 |
1733 |
} |
353db7966 NFS: avoid waitin... |
1734 1735 1736 |
nfss = NFS_SERVER(data->inode); if (atomic_long_read(&nfss->writeback) < NFS_CONGESTION_OFF_THRESH) clear_bdi_congested(&nfss->backing_dev_info, BLK_RW_ASYNC); |
f453a54a0 NFS: create nfs_c... |
1737 |
nfs_init_cinfo(&cinfo, data->inode, data->dreq); |
af7cf0579 NFS: Allow multip... |
1738 |
nfs_commit_end(cinfo.mds); |
5917ce844 NFSv4.1: pull out... |
1739 1740 1741 1742 |
} static void nfs_commit_release(void *calldata) { |
0b7c01533 NFS: add a struct... |
1743 |
struct nfs_commit_data *data = calldata; |
5917ce844 NFSv4.1: pull out... |
1744 |
|
f453a54a0 NFS: create nfs_c... |
1745 |
data->completion_ops->completion(data); |
c9d8f89d9 NFS: Ensure that ... |
1746 |
nfs_commitdata_release(calldata); |
1da177e4c Linux-2.6.12-rc2 |
1747 |
} |
788e7a89a NFS: Cleanup of N... |
1748 1749 |
static const struct rpc_call_ops nfs_commit_ops = { |
0b7c01533 NFS: add a struct... |
1750 |
.rpc_call_prepare = nfs_commit_prepare, |
788e7a89a NFS: Cleanup of N... |
1751 1752 1753 |
.rpc_call_done = nfs_commit_done, .rpc_release = nfs_commit_release, }; |
1da177e4c Linux-2.6.12-rc2 |
1754 |
|
f453a54a0 NFS: create nfs_c... |
1755 1756 |
static const struct nfs_commit_completion_ops nfs_commit_completion_ops = { .completion = nfs_commit_release_pages, |
b20135d0b NFSv4.1/pNFS: Don... |
1757 |
.resched_write = nfs_commit_resched_write, |
f453a54a0 NFS: create nfs_c... |
1758 |
}; |
1763da123 NFS: rewrite dire... |
1759 1760 |
int nfs_generic_commit_list(struct inode *inode, struct list_head *head, int how, struct nfs_commit_info *cinfo) |
84c53ab5c NFS: create nfs_g... |
1761 1762 |
{ int status; |
ea2cf2282 NFS: create struc... |
1763 |
status = pnfs_commit_list(inode, head, how, cinfo); |
84c53ab5c NFS: create nfs_g... |
1764 |
if (status == PNFS_NOT_ATTEMPTED) |
ea2cf2282 NFS: create struc... |
1765 |
status = nfs_commit_list(inode, head, how, cinfo); |
84c53ab5c NFS: create nfs_g... |
1766 1767 |
return status; } |
b608b283a NFS: kswapd must ... |
1768 |
int nfs_commit_inode(struct inode *inode, int how) |
1da177e4c Linux-2.6.12-rc2 |
1769 |
{ |
1da177e4c Linux-2.6.12-rc2 |
1770 |
LIST_HEAD(head); |
ea2cf2282 NFS: create struc... |
1771 |
struct nfs_commit_info cinfo; |
71d0a6112 NFS: Fix an unsta... |
1772 |
int may_wait = how & FLUSH_SYNC; |
af7cf0579 NFS: Allow multip... |
1773 |
int error = 0; |
b8413f98f NFS: Fix a hang/i... |
1774 |
int res; |
1da177e4c Linux-2.6.12-rc2 |
1775 |
|
ea2cf2282 NFS: create struc... |
1776 |
nfs_init_cinfo_from_inode(&cinfo, inode); |
af7cf0579 NFS: Allow multip... |
1777 |
nfs_commit_begin(cinfo.mds); |
ea2cf2282 NFS: create struc... |
1778 |
res = nfs_scan_commit(inode, &head, &cinfo); |
af7cf0579 NFS: Allow multip... |
1779 |
if (res) |
ea2cf2282 NFS: create struc... |
1780 |
error = nfs_generic_commit_list(inode, &head, how, &cinfo); |
af7cf0579 NFS: Allow multip... |
1781 1782 1783 1784 1785 1786 1787 1788 |
nfs_commit_end(cinfo.mds); if (error < 0) goto out_error; if (!may_wait) goto out_mark_dirty; error = wait_on_commit(cinfo.mds); if (error < 0) return error; |
c5efa5fc9 NFS: Ensure that ... |
1789 |
return res; |
af7cf0579 NFS: Allow multip... |
1790 1791 |
out_error: res = error; |
c5efa5fc9 NFS: Ensure that ... |
1792 1793 1794 1795 1796 1797 1798 |
/* Note: If we exit without ensuring that the commit is complete, * we must mark the inode as dirty. Otherwise, future calls to * sync_inode() with the WB_SYNC_ALL flag set will fail to ensure * that the data is on the disk. */ out_mark_dirty: __mark_inode_dirty(inode, I_DIRTY_DATASYNC); |
1da177e4c Linux-2.6.12-rc2 |
1799 1800 |
return res; } |
b20135d0b NFSv4.1/pNFS: Don... |
1801 |
EXPORT_SYMBOL_GPL(nfs_commit_inode); |
8fc795f70 NFS: Cleanup - mo... |
1802 |
|
ae09c31f6 NFS: Rename nfs_c... |
1803 |
int nfs_write_inode(struct inode *inode, struct writeback_control *wbc) |
8fc795f70 NFS: Cleanup - mo... |
1804 |
{ |
420e3646b NFS: Reduce the n... |
1805 1806 1807 |
struct nfs_inode *nfsi = NFS_I(inode); int flags = FLUSH_SYNC; int ret = 0; |
8fc795f70 NFS: Cleanup - mo... |
1808 |
|
3236c3e1a nfs: don't redirt... |
1809 |
/* no commits means nothing needs to be done */ |
ea2cf2282 NFS: create struc... |
1810 |
if (!nfsi->commit_info.ncommit) |
3236c3e1a nfs: don't redirt... |
1811 |
return ret; |
a00dd6c03 NFS: don't use FL... |
1812 1813 1814 1815 |
if (wbc->sync_mode == WB_SYNC_NONE) { /* Don't commit yet if this is a non-blocking flush and there * are a lot of outstanding writes for this mapping. */ |
cb1410c71 NFS: fix subtle c... |
1816 |
if (nfsi->commit_info.ncommit <= (nfsi->nrequests >> 1)) |
a00dd6c03 NFS: don't use FL... |
1817 |
goto out_mark_dirty; |
420e3646b NFS: Reduce the n... |
1818 |
|
a00dd6c03 NFS: don't use FL... |
1819 |
/* don't wait for the COMMIT response */ |
420e3646b NFS: Reduce the n... |
1820 |
flags = 0; |
a00dd6c03 NFS: don't use FL... |
1821 |
} |
420e3646b NFS: Reduce the n... |
1822 1823 1824 1825 1826 1827 1828 1829 |
ret = nfs_commit_inode(inode, flags); if (ret >= 0) { if (wbc->sync_mode == WB_SYNC_NONE) { if (ret < wbc->nr_to_write) wbc->nr_to_write -= ret; else wbc->nr_to_write = 0; } |
8fc795f70 NFS: Cleanup - mo... |
1830 |
return 0; |
420e3646b NFS: Reduce the n... |
1831 1832 |
} out_mark_dirty: |
8fc795f70 NFS: Cleanup - mo... |
1833 1834 1835 |
__mark_inode_dirty(inode, I_DIRTY_DATASYNC); return ret; } |
89d77c8fa NFS: Convert v4 i... |
1836 |
EXPORT_SYMBOL_GPL(nfs_write_inode); |
a8d8f02cf NFS: Create custo... |
1837 |
|
acdc53b21 NFS: Replace __nf... |
1838 |
/* |
837bb1d75 NFSv4.2: Fix writ... |
1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 |
* Wrapper for filemap_write_and_wait_range() * * Needed for pNFS in order to ensure data becomes visible to the * client. */ int nfs_filemap_write_and_wait_range(struct address_space *mapping, loff_t lstart, loff_t lend) { int ret; ret = filemap_write_and_wait_range(mapping, lstart, lend); if (ret == 0) ret = pnfs_sync_inode(mapping->host, true); return ret; } EXPORT_SYMBOL_GPL(nfs_filemap_write_and_wait_range); /* |
acdc53b21 NFS: Replace __nf... |
1857 1858 1859 |
* flush the inode to disk. */ int nfs_wb_all(struct inode *inode) |
34901f70d NFS: Writeback op... |
1860 |
{ |
f4ce1299b NFS: Add event tr... |
1861 1862 1863 |
int ret; trace_nfs_writeback_inode_enter(inode); |
5bb89b470 NFSv4.1/pnfs: Sep... |
1864 |
ret = filemap_write_and_wait(inode->i_mapping); |
6b1968756 nfs: stat(2) fail... |
1865 1866 1867 1868 1869 1870 1871 |
if (ret) goto out; ret = nfs_commit_inode(inode, FLUSH_SYNC); if (ret < 0) goto out; pnfs_sync_inode(inode, true); ret = 0; |
34901f70d NFS: Writeback op... |
1872 |
|
6b1968756 nfs: stat(2) fail... |
1873 |
out: |
f4ce1299b NFS: Add event tr... |
1874 1875 |
trace_nfs_writeback_inode_exit(inode, ret); return ret; |
1c75950b9 NFS: cleanup of n... |
1876 |
} |
ddda8e0aa NFS: Convert v2 i... |
1877 |
EXPORT_SYMBOL_GPL(nfs_wb_all); |
1c75950b9 NFS: cleanup of n... |
1878 |
|
1b3b4a1a2 NFS: Fix a write ... |
1879 1880 1881 |
int nfs_wb_page_cancel(struct inode *inode, struct page *page) { struct nfs_page *req; |
1b3b4a1a2 NFS: Fix a write ... |
1882 |
int ret = 0; |
3e2170451 nfs: handle multi... |
1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 |
wait_on_page_writeback(page); /* blocking call to cancel all requests and join to a single (head) * request */ req = nfs_lock_and_join_requests(page, false); if (IS_ERR(req)) { ret = PTR_ERR(req); } else if (req) { /* all requests from this page have been cancelled by * nfs_lock_and_join_requests, so just remove the head * request from the inode / page_private pointer and * release it */ nfs_inode_remove_request(req); |
3e2170451 nfs: handle multi... |
1897 |
nfs_unlock_and_release_request(req); |
1b3b4a1a2 NFS: Fix a write ... |
1898 |
} |
3e2170451 nfs: handle multi... |
1899 |
|
1b3b4a1a2 NFS: Fix a write ... |
1900 1901 |
return ret; } |
7f2f12d96 NFS: Simplify nfs... |
1902 1903 1904 |
/* * Write back all requests on one page - we do this before reading it. */ |
d6c843b96 nfs: only remove ... |
1905 |
int nfs_wb_single_page(struct inode *inode, struct page *page, bool launder) |
1c75950b9 NFS: cleanup of n... |
1906 |
{ |
29418aa4b nfs: disable data... |
1907 |
loff_t range_start = page_file_offset(page); |
09cbfeaf1 mm, fs: get rid o... |
1908 |
loff_t range_end = range_start + (loff_t)(PAGE_SIZE - 1); |
4d770ccf4 NFS: Ensure that ... |
1909 |
struct writeback_control wbc = { |
4d770ccf4 NFS: Ensure that ... |
1910 |
.sync_mode = WB_SYNC_ALL, |
7f2f12d96 NFS: Simplify nfs... |
1911 |
.nr_to_write = 0, |
4d770ccf4 NFS: Ensure that ... |
1912 1913 1914 1915 |
.range_start = range_start, .range_end = range_end, }; int ret; |
1c75950b9 NFS: cleanup of n... |
1916 |
|
f4ce1299b NFS: Add event tr... |
1917 |
trace_nfs_writeback_page_enter(inode); |
0522f6ade NFS: Fix another ... |
1918 |
for (;;) { |
ba8b06e67 NFS: Ensure that ... |
1919 |
wait_on_page_writeback(page); |
73e3302f6 NFS: Fix nfs_wb_p... |
1920 |
if (clear_page_dirty_for_io(page)) { |
d6c843b96 nfs: only remove ... |
1921 |
ret = nfs_writepage_locked(page, &wbc, launder); |
73e3302f6 NFS: Fix nfs_wb_p... |
1922 1923 |
if (ret < 0) goto out_error; |
0522f6ade NFS: Fix another ... |
1924 |
continue; |
7f2f12d96 NFS: Simplify nfs... |
1925 |
} |
f4ce1299b NFS: Add event tr... |
1926 |
ret = 0; |
0522f6ade NFS: Fix another ... |
1927 1928 1929 |
if (!PagePrivate(page)) break; ret = nfs_commit_inode(inode, FLUSH_SYNC); |
ba8b06e67 NFS: Ensure that ... |
1930 |
if (ret < 0) |
73e3302f6 NFS: Fix nfs_wb_p... |
1931 |
goto out_error; |
7f2f12d96 NFS: Simplify nfs... |
1932 |
} |
73e3302f6 NFS: Fix nfs_wb_p... |
1933 |
out_error: |
f4ce1299b NFS: Add event tr... |
1934 |
trace_nfs_writeback_page_exit(inode, ret); |
4d770ccf4 NFS: Ensure that ... |
1935 |
return ret; |
1c75950b9 NFS: cleanup of n... |
1936 |
} |
074cc1dee NFS: Add a ->migr... |
1937 1938 |
#ifdef CONFIG_MIGRATION int nfs_migrate_page(struct address_space *mapping, struct page *newpage, |
a6bc32b89 mm: compaction: i... |
1939 |
struct page *page, enum migrate_mode mode) |
074cc1dee NFS: Add a ->migr... |
1940 |
{ |
2da956523 nfs: don't try to... |
1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 |
/* * If PagePrivate is set, then the page is currently associated with * an in-progress read or write request. Don't try to migrate it. * * FIXME: we could do this in principle, but we'll need a way to ensure * that we can safely release the inode reference while holding * the page lock. */ if (PagePrivate(page)) return -EBUSY; |
074cc1dee NFS: Add a ->migr... |
1951 |
|
8c209ce72 NFS: nfs_migrate_... |
1952 1953 |
if (!nfs_fscache_release_page(page, GFP_KERNEL)) return -EBUSY; |
074cc1dee NFS: Add a ->migr... |
1954 |
|
a6bc32b89 mm: compaction: i... |
1955 |
return migrate_page(mapping, newpage, page, mode); |
074cc1dee NFS: Add a ->migr... |
1956 1957 |
} #endif |
f7b422b17 NFS: Split fs/nfs... |
1958 |
int __init nfs_init_writepagecache(void) |
1da177e4c Linux-2.6.12-rc2 |
1959 1960 |
{ nfs_wdata_cachep = kmem_cache_create("nfs_write_data", |
1e7f3a485 nfs: move nfs_pgi... |
1961 |
sizeof(struct nfs_pgio_header), |
1da177e4c Linux-2.6.12-rc2 |
1962 |
0, SLAB_HWCACHE_ALIGN, |
20c2df83d mm: Remove slab d... |
1963 |
NULL); |
1da177e4c Linux-2.6.12-rc2 |
1964 1965 |
if (nfs_wdata_cachep == NULL) return -ENOMEM; |
93d2341c7 [PATCH] mempool: ... |
1966 1967 |
nfs_wdata_mempool = mempool_create_slab_pool(MIN_POOL_WRITE, nfs_wdata_cachep); |
1da177e4c Linux-2.6.12-rc2 |
1968 |
if (nfs_wdata_mempool == NULL) |
3dd4765fc nfs: tear down ca... |
1969 |
goto out_destroy_write_cache; |
1da177e4c Linux-2.6.12-rc2 |
1970 |
|
0b7c01533 NFS: add a struct... |
1971 1972 1973 1974 1975 |
nfs_cdata_cachep = kmem_cache_create("nfs_commit_data", sizeof(struct nfs_commit_data), 0, SLAB_HWCACHE_ALIGN, NULL); if (nfs_cdata_cachep == NULL) |
3dd4765fc nfs: tear down ca... |
1976 |
goto out_destroy_write_mempool; |
0b7c01533 NFS: add a struct... |
1977 |
|
93d2341c7 [PATCH] mempool: ... |
1978 |
nfs_commit_mempool = mempool_create_slab_pool(MIN_POOL_COMMIT, |
4c1002100 nfs: Fix wrong sl... |
1979 |
nfs_cdata_cachep); |
1da177e4c Linux-2.6.12-rc2 |
1980 |
if (nfs_commit_mempool == NULL) |
3dd4765fc nfs: tear down ca... |
1981 |
goto out_destroy_commit_cache; |
1da177e4c Linux-2.6.12-rc2 |
1982 |
|
89a09141d [PATCH] nfs: fix ... |
1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 |
/* * NFS congestion size, scale with available memory. * * 64MB: 8192k * 128MB: 11585k * 256MB: 16384k * 512MB: 23170k * 1GB: 32768k * 2GB: 46340k * 4GB: 65536k * 8GB: 92681k * 16GB: 131072k * * This allows larger machines to have larger/more transfers. * Limit the default to 256M */ nfs_congestion_kb = (16*int_sqrt(totalram_pages)) << (PAGE_SHIFT-10); if (nfs_congestion_kb > 256*1024) nfs_congestion_kb = 256*1024; |
1da177e4c Linux-2.6.12-rc2 |
2002 |
return 0; |
3dd4765fc nfs: tear down ca... |
2003 2004 2005 2006 2007 2008 2009 2010 |
out_destroy_commit_cache: kmem_cache_destroy(nfs_cdata_cachep); out_destroy_write_mempool: mempool_destroy(nfs_wdata_mempool); out_destroy_write_cache: kmem_cache_destroy(nfs_wdata_cachep); return -ENOMEM; |
1da177e4c Linux-2.6.12-rc2 |
2011 |
} |
266bee886 [PATCH] fix stati... |
2012 |
void nfs_destroy_writepagecache(void) |
1da177e4c Linux-2.6.12-rc2 |
2013 2014 |
{ mempool_destroy(nfs_commit_mempool); |
3dd4765fc nfs: tear down ca... |
2015 |
kmem_cache_destroy(nfs_cdata_cachep); |
1da177e4c Linux-2.6.12-rc2 |
2016 |
mempool_destroy(nfs_wdata_mempool); |
1a1d92c10 [PATCH] Really ig... |
2017 |
kmem_cache_destroy(nfs_wdata_cachep); |
1da177e4c Linux-2.6.12-rc2 |
2018 |
} |
4a0de55c5 NFS: Create a com... |
2019 |
static const struct nfs_rw_ops nfs_rw_write_ops = { |
a4cdda591 NFS: Create a com... |
2020 |
.rw_mode = FMODE_WRITE, |
4a0de55c5 NFS: Create a com... |
2021 2022 |
.rw_alloc_header = nfs_writehdr_alloc, .rw_free_header = nfs_writehdr_free, |
0eecb2145 NFS: Create a com... |
2023 2024 |
.rw_done = nfs_writeback_done, .rw_result = nfs_writeback_result, |
1ed26f330 NFS: Create a com... |
2025 |
.rw_initiate = nfs_initiate_write, |
4a0de55c5 NFS: Create a com... |
2026 |
}; |