Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/fs/nfs/write.c |
| 3 | * |
Trond Myklebust | 7c85d90 | 2006-12-13 15:23:48 -0500 | [diff] [blame] | 4 | * Write file data over NFS. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * |
| 6 | * Copyright (C) 1996, 1997, Olaf Kirch <okir@monad.swb.de> |
| 7 | */ |
| 8 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | #include <linux/types.h> |
| 10 | #include <linux/slab.h> |
| 11 | #include <linux/mm.h> |
| 12 | #include <linux/pagemap.h> |
| 13 | #include <linux/file.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <linux/writeback.h> |
Peter Zijlstra | 89a0914 | 2007-03-16 13:38:26 -0800 | [diff] [blame] | 15 | #include <linux/swap.h> |
Trond Myklebust | 074cc1d | 2009-08-10 08:54:13 -0400 | [diff] [blame] | 16 | #include <linux/migrate.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | |
| 18 | #include <linux/sunrpc/clnt.h> |
| 19 | #include <linux/nfs_fs.h> |
| 20 | #include <linux/nfs_mount.h> |
| 21 | #include <linux/nfs_page.h> |
Andrew Morton | 3fcfab1 | 2006-10-19 23:28:16 -0700 | [diff] [blame] | 22 | #include <linux/backing-dev.h> |
Paul Gortmaker | afeacc8 | 2011-05-26 16:00:52 -0400 | [diff] [blame] | 23 | #include <linux/export.h> |
Andrew Morton | 3fcfab1 | 2006-10-19 23:28:16 -0700 | [diff] [blame] | 24 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <asm/uaccess.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | |
| 27 | #include "delegation.h" |
Trond Myklebust | 49a70f2 | 2006-12-05 00:35:38 -0500 | [diff] [blame] | 28 | #include "internal.h" |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 29 | #include "iostat.h" |
Andy Adamson | def6ed7 | 2009-04-01 09:22:26 -0400 | [diff] [blame] | 30 | #include "nfs4_fs.h" |
Trond Myklebust | 074cc1d | 2009-08-10 08:54:13 -0400 | [diff] [blame] | 31 | #include "fscache.h" |
Fred Isaman | 94ad1c8 | 2011-03-01 01:34:14 +0000 | [diff] [blame] | 32 | #include "pnfs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | |
Trond Myklebust | f4ce129 | 2013-08-19 18:59:33 -0400 | [diff] [blame] | 34 | #include "nfstrace.h" |
| 35 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #define NFSDBG_FACILITY NFSDBG_PAGECACHE |
| 37 | |
| 38 | #define MIN_POOL_WRITE (32) |
| 39 | #define MIN_POOL_COMMIT (4) |
| 40 | |
| 41 | /* |
| 42 | * Local function declarations |
| 43 | */ |
Fred Isaman | f8512ad | 2008-03-19 11:24:39 -0400 | [diff] [blame] | 44 | static void nfs_redirty_request(struct nfs_page *req); |
Trond Myklebust | 788e7a8 | 2006-03-20 13:44:27 -0500 | [diff] [blame] | 45 | static const struct rpc_call_ops nfs_commit_ops; |
Fred Isaman | 061ae2e | 2012-04-20 14:47:48 -0400 | [diff] [blame] | 46 | static const struct nfs_pgio_completion_ops nfs_async_write_completion_ops; |
Fred Isaman | f453a54 | 2012-04-20 14:47:54 -0400 | [diff] [blame] | 47 | static const struct nfs_commit_completion_ops nfs_commit_completion_ops; |
Anna Schumaker | 4a0de55 | 2014-05-06 09:12:30 -0400 | [diff] [blame] | 48 | static const struct nfs_rw_ops nfs_rw_write_ops; |
Weston Andros Adamson | d458138 | 2014-07-11 10:20:48 -0400 | [diff] [blame] | 49 | static void nfs_clear_request_commit(struct nfs_page *req); |
Weston Andros Adamson | 02d1426 | 2014-07-17 20:42:17 -0400 | [diff] [blame] | 50 | static void nfs_init_cinfo_from_inode(struct nfs_commit_info *cinfo, |
| 51 | struct inode *inode); |
Trond Myklebust | 3a3908c | 2014-09-08 22:21:00 -0700 | [diff] [blame] | 52 | static struct nfs_page * |
| 53 | nfs_page_search_commits_for_head_request_locked(struct nfs_inode *nfsi, |
| 54 | struct page *page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 56 | static struct kmem_cache *nfs_wdata_cachep; |
Trond Myklebust | 3feb2d4 | 2006-03-20 13:44:37 -0500 | [diff] [blame] | 57 | static mempool_t *nfs_wdata_mempool; |
Fred Isaman | 0b7c015 | 2012-04-20 14:47:39 -0400 | [diff] [blame] | 58 | static struct kmem_cache *nfs_cdata_cachep; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | static mempool_t *nfs_commit_mempool; |
| 60 | |
Fred Isaman | 0b7c015 | 2012-04-20 14:47:39 -0400 | [diff] [blame] | 61 | struct nfs_commit_data *nfs_commitdata_alloc(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | { |
Mel Gorman | 192e501 | 2012-07-31 16:45:16 -0700 | [diff] [blame] | 63 | struct nfs_commit_data *p = mempool_alloc(nfs_commit_mempool, GFP_NOIO); |
Chuck Lever | 40859d7 | 2005-11-30 18:09:02 -0500 | [diff] [blame] | 64 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | if (p) { |
| 66 | memset(p, 0, sizeof(*p)); |
| 67 | INIT_LIST_HEAD(&p->pages); |
| 68 | } |
| 69 | return p; |
| 70 | } |
Fred Isaman | e0c2b38 | 2011-03-23 13:27:53 +0000 | [diff] [blame] | 71 | EXPORT_SYMBOL_GPL(nfs_commitdata_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | |
Fred Isaman | 0b7c015 | 2012-04-20 14:47:39 -0400 | [diff] [blame] | 73 | void nfs_commit_free(struct nfs_commit_data *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | { |
| 75 | mempool_free(p, nfs_commit_mempool); |
| 76 | } |
Fred Isaman | e0c2b38 | 2011-03-23 13:27:53 +0000 | [diff] [blame] | 77 | EXPORT_SYMBOL_GPL(nfs_commit_free); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | |
Weston Andros Adamson | 1e7f3a4 | 2014-06-09 11:48:33 -0400 | [diff] [blame] | 79 | static struct nfs_pgio_header *nfs_writehdr_alloc(void) |
Trond Myklebust | 3feb2d4 | 2006-03-20 13:44:37 -0500 | [diff] [blame] | 80 | { |
Weston Andros Adamson | 1e7f3a4 | 2014-06-09 11:48:33 -0400 | [diff] [blame] | 81 | struct nfs_pgio_header *p = mempool_alloc(nfs_wdata_mempool, GFP_NOIO); |
Trond Myklebust | 3feb2d4 | 2006-03-20 13:44:37 -0500 | [diff] [blame] | 82 | |
Anna Schumaker | 4a0de55 | 2014-05-06 09:12:30 -0400 | [diff] [blame] | 83 | if (p) |
Trond Myklebust | 3feb2d4 | 2006-03-20 13:44:37 -0500 | [diff] [blame] | 84 | memset(p, 0, sizeof(*p)); |
Trond Myklebust | 3feb2d4 | 2006-03-20 13:44:37 -0500 | [diff] [blame] | 85 | return p; |
| 86 | } |
| 87 | |
Weston Andros Adamson | 1e7f3a4 | 2014-06-09 11:48:33 -0400 | [diff] [blame] | 88 | static void nfs_writehdr_free(struct nfs_pgio_header *hdr) |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 89 | { |
Weston Andros Adamson | 1e7f3a4 | 2014-06-09 11:48:33 -0400 | [diff] [blame] | 90 | mempool_free(hdr, nfs_wdata_mempool); |
Trond Myklebust | 3feb2d4 | 2006-03-20 13:44:37 -0500 | [diff] [blame] | 91 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | |
Trond Myklebust | 7b159fc | 2007-07-25 14:09:54 -0400 | [diff] [blame] | 93 | static void nfs_context_set_write_error(struct nfs_open_context *ctx, int error) |
| 94 | { |
| 95 | ctx->error = error; |
| 96 | smp_wmb(); |
| 97 | set_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags); |
| 98 | } |
| 99 | |
Weston Andros Adamson | 84d3a9a | 2014-07-11 10:20:47 -0400 | [diff] [blame] | 100 | /* |
| 101 | * nfs_page_find_head_request_locked - find head request associated with @page |
| 102 | * |
| 103 | * must be called while holding the inode lock. |
| 104 | * |
| 105 | * returns matching head request with reference held, or NULL if not found. |
| 106 | */ |
Mel Gorman | 29418aa | 2012-07-31 16:45:10 -0700 | [diff] [blame] | 107 | static struct nfs_page * |
Weston Andros Adamson | 84d3a9a | 2014-07-11 10:20:47 -0400 | [diff] [blame] | 108 | nfs_page_find_head_request_locked(struct nfs_inode *nfsi, struct page *page) |
Trond Myklebust | 277459d | 2006-12-05 00:35:35 -0500 | [diff] [blame] | 109 | { |
| 110 | struct nfs_page *req = NULL; |
| 111 | |
Mel Gorman | 29418aa | 2012-07-31 16:45:10 -0700 | [diff] [blame] | 112 | if (PagePrivate(page)) |
Trond Myklebust | 277459d | 2006-12-05 00:35:35 -0500 | [diff] [blame] | 113 | req = (struct nfs_page *)page_private(page); |
Weston Andros Adamson | 02d1426 | 2014-07-17 20:42:17 -0400 | [diff] [blame] | 114 | else if (unlikely(PageSwapCache(page))) |
| 115 | req = nfs_page_search_commits_for_head_request_locked(nfsi, |
| 116 | page); |
Mel Gorman | 29418aa | 2012-07-31 16:45:10 -0700 | [diff] [blame] | 117 | |
Weston Andros Adamson | 84d3a9a | 2014-07-11 10:20:47 -0400 | [diff] [blame] | 118 | if (req) { |
| 119 | WARN_ON_ONCE(req->wb_head != req); |
Mel Gorman | 29418aa | 2012-07-31 16:45:10 -0700 | [diff] [blame] | 120 | kref_get(&req->wb_kref); |
Weston Andros Adamson | 84d3a9a | 2014-07-11 10:20:47 -0400 | [diff] [blame] | 121 | } |
Mel Gorman | 29418aa | 2012-07-31 16:45:10 -0700 | [diff] [blame] | 122 | |
Trond Myklebust | 277459d | 2006-12-05 00:35:35 -0500 | [diff] [blame] | 123 | return req; |
| 124 | } |
| 125 | |
Weston Andros Adamson | 84d3a9a | 2014-07-11 10:20:47 -0400 | [diff] [blame] | 126 | /* |
| 127 | * nfs_page_find_head_request - find head request associated with @page |
| 128 | * |
| 129 | * returns matching head request with reference held, or NULL if not found. |
| 130 | */ |
| 131 | static struct nfs_page *nfs_page_find_head_request(struct page *page) |
Trond Myklebust | 277459d | 2006-12-05 00:35:35 -0500 | [diff] [blame] | 132 | { |
Mel Gorman | d56b4dd | 2012-07-31 16:45:06 -0700 | [diff] [blame] | 133 | struct inode *inode = page_file_mapping(page)->host; |
Trond Myklebust | 277459d | 2006-12-05 00:35:35 -0500 | [diff] [blame] | 134 | struct nfs_page *req = NULL; |
Trond Myklebust | 277459d | 2006-12-05 00:35:35 -0500 | [diff] [blame] | 135 | |
Trond Myklebust | 587142f | 2007-07-02 09:57:54 -0400 | [diff] [blame] | 136 | spin_lock(&inode->i_lock); |
Weston Andros Adamson | 84d3a9a | 2014-07-11 10:20:47 -0400 | [diff] [blame] | 137 | req = nfs_page_find_head_request_locked(NFS_I(inode), page); |
Trond Myklebust | 587142f | 2007-07-02 09:57:54 -0400 | [diff] [blame] | 138 | spin_unlock(&inode->i_lock); |
Trond Myklebust | 277459d | 2006-12-05 00:35:35 -0500 | [diff] [blame] | 139 | return req; |
| 140 | } |
| 141 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | /* Adjust the file length if we're writing beyond the end */ |
| 143 | static void nfs_grow_file(struct page *page, unsigned int offset, unsigned int count) |
| 144 | { |
Mel Gorman | d56b4dd | 2012-07-31 16:45:06 -0700 | [diff] [blame] | 145 | struct inode *inode = page_file_mapping(page)->host; |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 146 | loff_t end, i_size; |
| 147 | pgoff_t end_index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 149 | spin_lock(&inode->i_lock); |
| 150 | i_size = i_size_read(inode); |
| 151 | end_index = (i_size - 1) >> PAGE_CACHE_SHIFT; |
Mel Gorman | d56b4dd | 2012-07-31 16:45:06 -0700 | [diff] [blame] | 152 | if (i_size > 0 && page_file_index(page) < end_index) |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 153 | goto out; |
Mel Gorman | d56b4dd | 2012-07-31 16:45:06 -0700 | [diff] [blame] | 154 | end = page_file_offset(page) + ((loff_t)offset+count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | if (i_size >= end) |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 156 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | i_size_write(inode, end); |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 158 | nfs_inc_stats(inode, NFSIOS_EXTENDWRITE); |
| 159 | out: |
| 160 | spin_unlock(&inode->i_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | } |
| 162 | |
Trond Myklebust | a301b77 | 2007-02-06 11:07:15 -0800 | [diff] [blame] | 163 | /* A writeback failed: mark the page as bad, and invalidate the page cache */ |
| 164 | static void nfs_set_pageerror(struct page *page) |
| 165 | { |
Mel Gorman | d56b4dd | 2012-07-31 16:45:06 -0700 | [diff] [blame] | 166 | nfs_zap_mapping(page_file_mapping(page)->host, page_file_mapping(page)); |
Trond Myklebust | a301b77 | 2007-02-06 11:07:15 -0800 | [diff] [blame] | 167 | } |
| 168 | |
Weston Andros Adamson | d72ddcb | 2014-05-15 11:56:48 -0400 | [diff] [blame] | 169 | /* |
| 170 | * nfs_page_group_search_locked |
| 171 | * @head - head request of page group |
| 172 | * @page_offset - offset into page |
| 173 | * |
| 174 | * Search page group with head @head to find a request that contains the |
| 175 | * page offset @page_offset. |
| 176 | * |
| 177 | * Returns a pointer to the first matching nfs request, or NULL if no |
| 178 | * match is found. |
| 179 | * |
| 180 | * Must be called with the page group lock held |
| 181 | */ |
| 182 | static struct nfs_page * |
| 183 | nfs_page_group_search_locked(struct nfs_page *head, unsigned int page_offset) |
| 184 | { |
| 185 | struct nfs_page *req; |
| 186 | |
| 187 | WARN_ON_ONCE(head != head->wb_head); |
| 188 | WARN_ON_ONCE(!test_bit(PG_HEADLOCK, &head->wb_head->wb_flags)); |
| 189 | |
| 190 | req = head; |
| 191 | do { |
| 192 | if (page_offset >= req->wb_pgbase && |
| 193 | page_offset < (req->wb_pgbase + req->wb_bytes)) |
| 194 | return req; |
| 195 | |
| 196 | req = req->wb_this_page; |
| 197 | } while (req != head); |
| 198 | |
| 199 | return NULL; |
| 200 | } |
| 201 | |
| 202 | /* |
| 203 | * nfs_page_group_covers_page |
| 204 | * @head - head request of page group |
| 205 | * |
| 206 | * Return true if the page group with head @head covers the whole page, |
| 207 | * returns false otherwise |
| 208 | */ |
| 209 | static bool nfs_page_group_covers_page(struct nfs_page *req) |
| 210 | { |
| 211 | struct nfs_page *tmp; |
| 212 | unsigned int pos = 0; |
| 213 | unsigned int len = nfs_page_length(req->wb_page); |
| 214 | |
Weston Andros Adamson | fd2f3a0 | 2014-08-08 11:00:53 -0400 | [diff] [blame] | 215 | nfs_page_group_lock(req, false); |
Weston Andros Adamson | d72ddcb | 2014-05-15 11:56:48 -0400 | [diff] [blame] | 216 | |
| 217 | do { |
| 218 | tmp = nfs_page_group_search_locked(req->wb_head, pos); |
| 219 | if (tmp) { |
| 220 | /* no way this should happen */ |
| 221 | WARN_ON_ONCE(tmp->wb_pgbase != pos); |
| 222 | pos += tmp->wb_bytes - (pos - tmp->wb_pgbase); |
| 223 | } |
| 224 | } while (tmp && pos < len); |
| 225 | |
| 226 | nfs_page_group_unlock(req); |
| 227 | WARN_ON_ONCE(pos > len); |
| 228 | return pos == len; |
| 229 | } |
| 230 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | /* We can set the PG_uptodate flag if we see that a write request |
| 232 | * covers the full page. |
| 233 | */ |
Weston Andros Adamson | d72ddcb | 2014-05-15 11:56:48 -0400 | [diff] [blame] | 234 | static void nfs_mark_uptodate(struct nfs_page *req) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | { |
Weston Andros Adamson | d72ddcb | 2014-05-15 11:56:48 -0400 | [diff] [blame] | 236 | if (PageUptodate(req->wb_page)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | return; |
Weston Andros Adamson | d72ddcb | 2014-05-15 11:56:48 -0400 | [diff] [blame] | 238 | if (!nfs_page_group_covers_page(req)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | return; |
Weston Andros Adamson | d72ddcb | 2014-05-15 11:56:48 -0400 | [diff] [blame] | 240 | SetPageUptodate(req->wb_page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | } |
| 242 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | static int wb_priority(struct writeback_control *wbc) |
| 244 | { |
NeilBrown | e87b4c7 | 2014-09-18 16:09:27 +1000 | [diff] [blame] | 245 | int ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | if (wbc->for_reclaim) |
Trond Myklebust | c63c7b0 | 2007-04-02 19:29:52 -0400 | [diff] [blame] | 247 | return FLUSH_HIGHPRI | FLUSH_STABLE; |
NeilBrown | e87b4c7 | 2014-09-18 16:09:27 +1000 | [diff] [blame] | 248 | if (wbc->sync_mode == WB_SYNC_ALL) |
| 249 | ret = FLUSH_COND_STABLE; |
Wu Fengguang | b17621f | 2009-12-03 13:54:25 +0100 | [diff] [blame] | 250 | if (wbc->for_kupdate || wbc->for_background) |
NeilBrown | e87b4c7 | 2014-09-18 16:09:27 +1000 | [diff] [blame] | 251 | ret |= FLUSH_LOWPRI; |
| 252 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | } |
| 254 | |
| 255 | /* |
Peter Zijlstra | 89a0914 | 2007-03-16 13:38:26 -0800 | [diff] [blame] | 256 | * NFS congestion control |
| 257 | */ |
| 258 | |
| 259 | int nfs_congestion_kb; |
| 260 | |
| 261 | #define NFS_CONGESTION_ON_THRESH (nfs_congestion_kb >> (PAGE_SHIFT-10)) |
| 262 | #define NFS_CONGESTION_OFF_THRESH \ |
| 263 | (NFS_CONGESTION_ON_THRESH - (NFS_CONGESTION_ON_THRESH >> 2)) |
| 264 | |
Trond Myklebust | deed85e | 2012-10-15 15:02:01 -0400 | [diff] [blame] | 265 | static void nfs_set_page_writeback(struct page *page) |
Peter Zijlstra | 89a0914 | 2007-03-16 13:38:26 -0800 | [diff] [blame] | 266 | { |
Trond Myklebust | deed85e | 2012-10-15 15:02:01 -0400 | [diff] [blame] | 267 | struct nfs_server *nfss = NFS_SERVER(page_file_mapping(page)->host); |
Trond Myklebust | 5a6d41b | 2007-04-14 19:10:12 -0400 | [diff] [blame] | 268 | int ret = test_set_page_writeback(page); |
| 269 | |
Trond Myklebust | deed85e | 2012-10-15 15:02:01 -0400 | [diff] [blame] | 270 | WARN_ON_ONCE(ret != 0); |
Peter Zijlstra | 89a0914 | 2007-03-16 13:38:26 -0800 | [diff] [blame] | 271 | |
Trond Myklebust | deed85e | 2012-10-15 15:02:01 -0400 | [diff] [blame] | 272 | if (atomic_long_inc_return(&nfss->writeback) > |
| 273 | NFS_CONGESTION_ON_THRESH) { |
| 274 | set_bdi_congested(&nfss->backing_dev_info, |
| 275 | BLK_RW_ASYNC); |
Peter Zijlstra | 89a0914 | 2007-03-16 13:38:26 -0800 | [diff] [blame] | 276 | } |
| 277 | } |
| 278 | |
Weston Andros Adamson | 20633f0 | 2014-05-15 11:56:47 -0400 | [diff] [blame] | 279 | static void nfs_end_page_writeback(struct nfs_page *req) |
Peter Zijlstra | 89a0914 | 2007-03-16 13:38:26 -0800 | [diff] [blame] | 280 | { |
Weston Andros Adamson | 20633f0 | 2014-05-15 11:56:47 -0400 | [diff] [blame] | 281 | struct inode *inode = page_file_mapping(req->wb_page)->host; |
Peter Zijlstra | 89a0914 | 2007-03-16 13:38:26 -0800 | [diff] [blame] | 282 | struct nfs_server *nfss = NFS_SERVER(inode); |
| 283 | |
Weston Andros Adamson | 20633f0 | 2014-05-15 11:56:47 -0400 | [diff] [blame] | 284 | if (!nfs_page_group_sync_on_bit(req, PG_WB_END)) |
| 285 | return; |
| 286 | |
| 287 | end_page_writeback(req->wb_page); |
Peter Zijlstra | c4dc4be | 2007-10-16 23:25:41 -0700 | [diff] [blame] | 288 | if (atomic_long_dec_return(&nfss->writeback) < NFS_CONGESTION_OFF_THRESH) |
Jens Axboe | 8aa7e84 | 2009-07-09 14:52:32 +0200 | [diff] [blame] | 289 | clear_bdi_congested(&nfss->backing_dev_info, BLK_RW_ASYNC); |
Peter Zijlstra | 89a0914 | 2007-03-16 13:38:26 -0800 | [diff] [blame] | 290 | } |
| 291 | |
Weston Andros Adamson | d458138 | 2014-07-11 10:20:48 -0400 | [diff] [blame] | 292 | |
| 293 | /* nfs_page_group_clear_bits |
| 294 | * @req - an nfs request |
| 295 | * clears all page group related bits from @req |
| 296 | */ |
| 297 | static void |
| 298 | nfs_page_group_clear_bits(struct nfs_page *req) |
Trond Myklebust | e261f51 | 2006-12-05 00:35:41 -0500 | [diff] [blame] | 299 | { |
Weston Andros Adamson | d458138 | 2014-07-11 10:20:48 -0400 | [diff] [blame] | 300 | clear_bit(PG_TEARDOWN, &req->wb_flags); |
| 301 | clear_bit(PG_UNLOCKPAGE, &req->wb_flags); |
| 302 | clear_bit(PG_UPTODATE, &req->wb_flags); |
| 303 | clear_bit(PG_WB_END, &req->wb_flags); |
| 304 | clear_bit(PG_REMOVE, &req->wb_flags); |
| 305 | } |
| 306 | |
| 307 | |
| 308 | /* |
| 309 | * nfs_unroll_locks_and_wait - unlock all newly locked reqs and wait on @req |
| 310 | * |
| 311 | * this is a helper function for nfs_lock_and_join_requests |
| 312 | * |
| 313 | * @inode - inode associated with request page group, must be holding inode lock |
| 314 | * @head - head request of page group, must be holding head lock |
| 315 | * @req - request that couldn't lock and needs to wait on the req bit lock |
| 316 | * @nonblock - if true, don't actually wait |
| 317 | * |
| 318 | * NOTE: this must be called holding page_group bit lock and inode spin lock |
| 319 | * and BOTH will be released before returning. |
| 320 | * |
| 321 | * returns 0 on success, < 0 on error. |
| 322 | */ |
| 323 | static int |
| 324 | nfs_unroll_locks_and_wait(struct inode *inode, struct nfs_page *head, |
| 325 | struct nfs_page *req, bool nonblock) |
| 326 | __releases(&inode->i_lock) |
| 327 | { |
| 328 | struct nfs_page *tmp; |
Trond Myklebust | e261f51 | 2006-12-05 00:35:41 -0500 | [diff] [blame] | 329 | int ret; |
| 330 | |
Weston Andros Adamson | d458138 | 2014-07-11 10:20:48 -0400 | [diff] [blame] | 331 | /* relinquish all the locks successfully grabbed this run */ |
| 332 | for (tmp = head ; tmp != req; tmp = tmp->wb_this_page) |
| 333 | nfs_unlock_request(tmp); |
| 334 | |
| 335 | WARN_ON_ONCE(test_bit(PG_TEARDOWN, &req->wb_flags)); |
| 336 | |
| 337 | /* grab a ref on the request that will be waited on */ |
| 338 | kref_get(&req->wb_kref); |
| 339 | |
| 340 | nfs_page_group_unlock(head); |
Trond Myklebust | 587142f | 2007-07-02 09:57:54 -0400 | [diff] [blame] | 341 | spin_unlock(&inode->i_lock); |
Weston Andros Adamson | d458138 | 2014-07-11 10:20:48 -0400 | [diff] [blame] | 342 | |
| 343 | /* release ref from nfs_page_find_head_request_locked */ |
| 344 | nfs_release_request(head); |
| 345 | |
| 346 | if (!nonblock) |
| 347 | ret = nfs_wait_on_request(req); |
| 348 | else |
| 349 | ret = -EAGAIN; |
| 350 | nfs_release_request(req); |
| 351 | |
| 352 | return ret; |
| 353 | } |
| 354 | |
| 355 | /* |
| 356 | * nfs_destroy_unlinked_subrequests - destroy recently unlinked subrequests |
| 357 | * |
| 358 | * @destroy_list - request list (using wb_this_page) terminated by @old_head |
| 359 | * @old_head - the old head of the list |
| 360 | * |
| 361 | * All subrequests must be locked and removed from all lists, so at this point |
| 362 | * they are only "active" in this function, and possibly in nfs_wait_on_request |
| 363 | * with a reference held by some other context. |
| 364 | */ |
| 365 | static void |
| 366 | nfs_destroy_unlinked_subrequests(struct nfs_page *destroy_list, |
| 367 | struct nfs_page *old_head) |
| 368 | { |
| 369 | while (destroy_list) { |
| 370 | struct nfs_page *subreq = destroy_list; |
| 371 | |
| 372 | destroy_list = (subreq->wb_this_page == old_head) ? |
| 373 | NULL : subreq->wb_this_page; |
| 374 | |
| 375 | WARN_ON_ONCE(old_head != subreq->wb_head); |
| 376 | |
| 377 | /* make sure old group is not used */ |
| 378 | subreq->wb_head = subreq; |
| 379 | subreq->wb_this_page = subreq; |
| 380 | |
Weston Andros Adamson | d458138 | 2014-07-11 10:20:48 -0400 | [diff] [blame] | 381 | /* subreq is now totally disconnected from page group or any |
| 382 | * write / commit lists. last chance to wake any waiters */ |
| 383 | nfs_unlock_request(subreq); |
| 384 | |
| 385 | if (!test_bit(PG_TEARDOWN, &subreq->wb_flags)) { |
| 386 | /* release ref on old head request */ |
| 387 | nfs_release_request(old_head); |
| 388 | |
| 389 | nfs_page_group_clear_bits(subreq); |
| 390 | |
| 391 | /* release the PG_INODE_REF reference */ |
| 392 | if (test_and_clear_bit(PG_INODE_REF, &subreq->wb_flags)) |
| 393 | nfs_release_request(subreq); |
| 394 | else |
| 395 | WARN_ON_ONCE(1); |
| 396 | } else { |
| 397 | WARN_ON_ONCE(test_bit(PG_CLEAN, &subreq->wb_flags)); |
| 398 | /* zombie requests have already released the last |
| 399 | * reference and were waiting on the rest of the |
| 400 | * group to complete. Since it's no longer part of a |
| 401 | * group, simply free the request */ |
| 402 | nfs_page_group_clear_bits(subreq); |
| 403 | nfs_free_request(subreq); |
| 404 | } |
| 405 | } |
| 406 | } |
| 407 | |
| 408 | /* |
| 409 | * nfs_lock_and_join_requests - join all subreqs to the head req and return |
| 410 | * a locked reference, cancelling any pending |
| 411 | * operations for this page. |
| 412 | * |
| 413 | * @page - the page used to lookup the "page group" of nfs_page structures |
| 414 | * @nonblock - if true, don't block waiting for request locks |
| 415 | * |
| 416 | * This function joins all sub requests to the head request by first |
| 417 | * locking all requests in the group, cancelling any pending operations |
| 418 | * and finally updating the head request to cover the whole range covered by |
| 419 | * the (former) group. All subrequests are removed from any write or commit |
| 420 | * lists, unlinked from the group and destroyed. |
| 421 | * |
| 422 | * Returns a locked, referenced pointer to the head request - which after |
| 423 | * this call is guaranteed to be the only request associated with the page. |
| 424 | * Returns NULL if no requests are found for @page, or a ERR_PTR if an |
| 425 | * error was encountered. |
| 426 | */ |
| 427 | static struct nfs_page * |
| 428 | nfs_lock_and_join_requests(struct page *page, bool nonblock) |
| 429 | { |
| 430 | struct inode *inode = page_file_mapping(page)->host; |
| 431 | struct nfs_page *head, *subreq; |
| 432 | struct nfs_page *destroy_list = NULL; |
| 433 | unsigned int total_bytes; |
| 434 | int ret; |
| 435 | |
| 436 | try_again: |
| 437 | total_bytes = 0; |
| 438 | |
| 439 | WARN_ON_ONCE(destroy_list); |
| 440 | |
| 441 | spin_lock(&inode->i_lock); |
| 442 | |
| 443 | /* |
| 444 | * A reference is taken only on the head request which acts as a |
| 445 | * reference to the whole page group - the group will not be destroyed |
| 446 | * until the head reference is released. |
| 447 | */ |
| 448 | head = nfs_page_find_head_request_locked(NFS_I(inode), page); |
| 449 | |
| 450 | if (!head) { |
| 451 | spin_unlock(&inode->i_lock); |
| 452 | return NULL; |
| 453 | } |
| 454 | |
Weston Andros Adamson | 7c3af97 | 2014-08-08 11:00:57 -0400 | [diff] [blame] | 455 | /* holding inode lock, so always make a non-blocking call to try the |
| 456 | * page group lock */ |
Weston Andros Adamson | fd2f3a0 | 2014-08-08 11:00:53 -0400 | [diff] [blame] | 457 | ret = nfs_page_group_lock(head, true); |
Weston Andros Adamson | 9497001 | 2014-08-08 11:00:56 -0400 | [diff] [blame] | 458 | if (ret < 0) { |
| 459 | spin_unlock(&inode->i_lock); |
Weston Andros Adamson | 7c3af97 | 2014-08-08 11:00:57 -0400 | [diff] [blame] | 460 | |
| 461 | if (!nonblock && ret == -EAGAIN) { |
| 462 | nfs_page_group_lock_wait(head); |
| 463 | nfs_release_request(head); |
| 464 | goto try_again; |
| 465 | } |
| 466 | |
Weston Andros Adamson | 9497001 | 2014-08-08 11:00:56 -0400 | [diff] [blame] | 467 | nfs_release_request(head); |
Weston Andros Adamson | e702920 | 2014-07-17 20:42:15 -0400 | [diff] [blame] | 468 | return ERR_PTR(ret); |
Weston Andros Adamson | 9497001 | 2014-08-08 11:00:56 -0400 | [diff] [blame] | 469 | } |
Weston Andros Adamson | 7c3af97 | 2014-08-08 11:00:57 -0400 | [diff] [blame] | 470 | |
| 471 | /* lock each request in the page group */ |
Weston Andros Adamson | d458138 | 2014-07-11 10:20:48 -0400 | [diff] [blame] | 472 | subreq = head; |
| 473 | do { |
| 474 | /* |
| 475 | * Subrequests are always contiguous, non overlapping |
Weston Andros Adamson | 309a1d6 | 2014-09-05 16:34:29 -0400 | [diff] [blame] | 476 | * and in order - but may be repeated (mirrored writes). |
Weston Andros Adamson | d458138 | 2014-07-11 10:20:48 -0400 | [diff] [blame] | 477 | */ |
Weston Andros Adamson | 309a1d6 | 2014-09-05 16:34:29 -0400 | [diff] [blame] | 478 | if (subreq->wb_offset == (head->wb_offset + total_bytes)) { |
| 479 | /* keep track of how many bytes this group covers */ |
| 480 | total_bytes += subreq->wb_bytes; |
| 481 | } else if (WARN_ON_ONCE(subreq->wb_offset < head->wb_offset || |
| 482 | ((subreq->wb_offset + subreq->wb_bytes) > |
| 483 | (head->wb_offset + total_bytes)))) { |
| 484 | nfs_page_group_unlock(head); |
| 485 | spin_unlock(&inode->i_lock); |
| 486 | return ERR_PTR(-EIO); |
| 487 | } |
Weston Andros Adamson | d458138 | 2014-07-11 10:20:48 -0400 | [diff] [blame] | 488 | |
| 489 | if (!nfs_lock_request(subreq)) { |
| 490 | /* releases page group bit lock and |
| 491 | * inode spin lock and all references */ |
| 492 | ret = nfs_unroll_locks_and_wait(inode, head, |
| 493 | subreq, nonblock); |
| 494 | |
| 495 | if (ret == 0) |
| 496 | goto try_again; |
| 497 | |
| 498 | return ERR_PTR(ret); |
| 499 | } |
| 500 | |
| 501 | subreq = subreq->wb_this_page; |
| 502 | } while (subreq != head); |
| 503 | |
| 504 | /* Now that all requests are locked, make sure they aren't on any list. |
| 505 | * Commit list removal accounting is done after locks are dropped */ |
| 506 | subreq = head; |
| 507 | do { |
Weston Andros Adamson | 411a99a | 2014-07-17 20:42:19 -0400 | [diff] [blame] | 508 | nfs_clear_request_commit(subreq); |
Weston Andros Adamson | d458138 | 2014-07-11 10:20:48 -0400 | [diff] [blame] | 509 | subreq = subreq->wb_this_page; |
| 510 | } while (subreq != head); |
| 511 | |
| 512 | /* unlink subrequests from head, destroy them later */ |
| 513 | if (head->wb_this_page != head) { |
| 514 | /* destroy list will be terminated by head */ |
| 515 | destroy_list = head->wb_this_page; |
| 516 | head->wb_this_page = head; |
| 517 | |
| 518 | /* change head request to cover whole range that |
| 519 | * the former page group covered */ |
| 520 | head->wb_bytes = total_bytes; |
| 521 | } |
| 522 | |
| 523 | /* |
| 524 | * prepare head request to be added to new pgio descriptor |
| 525 | */ |
| 526 | nfs_page_group_clear_bits(head); |
| 527 | |
| 528 | /* |
| 529 | * some part of the group was still on the inode list - otherwise |
| 530 | * the group wouldn't be involved in async write. |
| 531 | * grab a reference for the head request, iff it needs one. |
| 532 | */ |
| 533 | if (!test_and_set_bit(PG_INODE_REF, &head->wb_flags)) |
| 534 | kref_get(&head->wb_kref); |
| 535 | |
| 536 | nfs_page_group_unlock(head); |
| 537 | |
Weston Andros Adamson | 411a99a | 2014-07-17 20:42:19 -0400 | [diff] [blame] | 538 | /* drop lock to clean uprequests on destroy list */ |
Weston Andros Adamson | d458138 | 2014-07-11 10:20:48 -0400 | [diff] [blame] | 539 | spin_unlock(&inode->i_lock); |
| 540 | |
| 541 | nfs_destroy_unlinked_subrequests(destroy_list, head); |
| 542 | |
Weston Andros Adamson | d458138 | 2014-07-11 10:20:48 -0400 | [diff] [blame] | 543 | /* still holds ref on head from nfs_page_find_head_request_locked |
| 544 | * and still has lock on head from lock loop */ |
| 545 | return head; |
Trond Myklebust | 074cc1d | 2009-08-10 08:54:13 -0400 | [diff] [blame] | 546 | } |
| 547 | |
| 548 | /* |
| 549 | * Find an associated nfs write request, and prepare to flush it out |
| 550 | * May return an error if the user signalled nfs_wait_on_request(). |
| 551 | */ |
| 552 | static int nfs_page_async_flush(struct nfs_pageio_descriptor *pgio, |
Trond Myklebust | cfb506e | 2010-07-30 15:31:57 -0400 | [diff] [blame] | 553 | struct page *page, bool nonblock) |
Trond Myklebust | 074cc1d | 2009-08-10 08:54:13 -0400 | [diff] [blame] | 554 | { |
| 555 | struct nfs_page *req; |
| 556 | int ret = 0; |
| 557 | |
Weston Andros Adamson | d458138 | 2014-07-11 10:20:48 -0400 | [diff] [blame] | 558 | req = nfs_lock_and_join_requests(page, nonblock); |
Trond Myklebust | 074cc1d | 2009-08-10 08:54:13 -0400 | [diff] [blame] | 559 | if (!req) |
| 560 | goto out; |
| 561 | ret = PTR_ERR(req); |
| 562 | if (IS_ERR(req)) |
| 563 | goto out; |
| 564 | |
Trond Myklebust | deed85e | 2012-10-15 15:02:01 -0400 | [diff] [blame] | 565 | nfs_set_page_writeback(page); |
| 566 | WARN_ON_ONCE(test_bit(PG_CLEAN, &req->wb_flags)); |
Trond Myklebust | 074cc1d | 2009-08-10 08:54:13 -0400 | [diff] [blame] | 567 | |
Trond Myklebust | deed85e | 2012-10-15 15:02:01 -0400 | [diff] [blame] | 568 | ret = 0; |
Fred Isaman | f8512ad | 2008-03-19 11:24:39 -0400 | [diff] [blame] | 569 | if (!nfs_pageio_add_request(pgio, req)) { |
| 570 | nfs_redirty_request(req); |
Trond Myklebust | 074cc1d | 2009-08-10 08:54:13 -0400 | [diff] [blame] | 571 | ret = pgio->pg_error; |
Fred Isaman | f8512ad | 2008-03-19 11:24:39 -0400 | [diff] [blame] | 572 | } |
Trond Myklebust | 074cc1d | 2009-08-10 08:54:13 -0400 | [diff] [blame] | 573 | out: |
| 574 | return ret; |
Trond Myklebust | e261f51 | 2006-12-05 00:35:41 -0500 | [diff] [blame] | 575 | } |
| 576 | |
Trond Myklebust | f758c885 | 2007-07-22 19:27:32 -0400 | [diff] [blame] | 577 | static int nfs_do_writepage(struct page *page, struct writeback_control *wbc, struct nfs_pageio_descriptor *pgio) |
| 578 | { |
Mel Gorman | d56b4dd | 2012-07-31 16:45:06 -0700 | [diff] [blame] | 579 | struct inode *inode = page_file_mapping(page)->host; |
Trond Myklebust | cfb506e | 2010-07-30 15:31:57 -0400 | [diff] [blame] | 580 | int ret; |
Trond Myklebust | f758c885 | 2007-07-22 19:27:32 -0400 | [diff] [blame] | 581 | |
| 582 | nfs_inc_stats(inode, NFSIOS_VFSWRITEPAGE); |
Nicolas Iooss | 3708f84 | 2015-04-16 18:48:39 +0800 | [diff] [blame] | 583 | nfs_add_stats(inode, NFSIOS_WRITEPAGES, 1); |
Trond Myklebust | f758c885 | 2007-07-22 19:27:32 -0400 | [diff] [blame] | 584 | |
Mel Gorman | d56b4dd | 2012-07-31 16:45:06 -0700 | [diff] [blame] | 585 | nfs_pageio_cond_complete(pgio, page_file_index(page)); |
Wu Fengguang | 1b430be | 2010-10-26 14:21:26 -0700 | [diff] [blame] | 586 | ret = nfs_page_async_flush(pgio, page, wbc->sync_mode == WB_SYNC_NONE); |
Trond Myklebust | cfb506e | 2010-07-30 15:31:57 -0400 | [diff] [blame] | 587 | if (ret == -EAGAIN) { |
| 588 | redirty_page_for_writepage(wbc, page); |
| 589 | ret = 0; |
| 590 | } |
| 591 | return ret; |
Trond Myklebust | f758c885 | 2007-07-22 19:27:32 -0400 | [diff] [blame] | 592 | } |
| 593 | |
Trond Myklebust | e261f51 | 2006-12-05 00:35:41 -0500 | [diff] [blame] | 594 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | * Write an mmapped page to the server. |
| 596 | */ |
Trond Myklebust | 4d770cc | 2006-12-05 00:35:41 -0500 | [diff] [blame] | 597 | static int nfs_writepage_locked(struct page *page, struct writeback_control *wbc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | { |
Trond Myklebust | f758c885 | 2007-07-22 19:27:32 -0400 | [diff] [blame] | 599 | struct nfs_pageio_descriptor pgio; |
Trond Myklebust | e261f51 | 2006-12-05 00:35:41 -0500 | [diff] [blame] | 600 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | |
Christoph Hellwig | a20c93e | 2014-04-16 15:07:21 +0200 | [diff] [blame] | 602 | nfs_pageio_init_write(&pgio, page->mapping->host, wb_priority(wbc), |
| 603 | false, &nfs_async_write_completion_ops); |
Trond Myklebust | f758c885 | 2007-07-22 19:27:32 -0400 | [diff] [blame] | 604 | err = nfs_do_writepage(page, wbc, &pgio); |
| 605 | nfs_pageio_complete(&pgio); |
| 606 | if (err < 0) |
| 607 | return err; |
| 608 | if (pgio.pg_error < 0) |
| 609 | return pgio.pg_error; |
| 610 | return 0; |
Trond Myklebust | 4d770cc | 2006-12-05 00:35:41 -0500 | [diff] [blame] | 611 | } |
| 612 | |
| 613 | int nfs_writepage(struct page *page, struct writeback_control *wbc) |
| 614 | { |
Trond Myklebust | f758c885 | 2007-07-22 19:27:32 -0400 | [diff] [blame] | 615 | int ret; |
Trond Myklebust | 4d770cc | 2006-12-05 00:35:41 -0500 | [diff] [blame] | 616 | |
Trond Myklebust | f758c885 | 2007-07-22 19:27:32 -0400 | [diff] [blame] | 617 | ret = nfs_writepage_locked(page, wbc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | unlock_page(page); |
Trond Myklebust | f758c885 | 2007-07-22 19:27:32 -0400 | [diff] [blame] | 619 | return ret; |
| 620 | } |
| 621 | |
| 622 | static int nfs_writepages_callback(struct page *page, struct writeback_control *wbc, void *data) |
| 623 | { |
| 624 | int ret; |
| 625 | |
| 626 | ret = nfs_do_writepage(page, wbc, data); |
| 627 | unlock_page(page); |
| 628 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | } |
| 630 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | int nfs_writepages(struct address_space *mapping, struct writeback_control *wbc) |
| 632 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | struct inode *inode = mapping->host; |
Trond Myklebust | 72cb77f | 2009-03-11 14:10:30 -0400 | [diff] [blame] | 634 | unsigned long *bitlock = &NFS_I(inode)->flags; |
Trond Myklebust | c63c7b0 | 2007-04-02 19:29:52 -0400 | [diff] [blame] | 635 | struct nfs_pageio_descriptor pgio; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | int err; |
| 637 | |
Trond Myklebust | 72cb77f | 2009-03-11 14:10:30 -0400 | [diff] [blame] | 638 | /* Stop dirtying of new pages while we sync */ |
NeilBrown | 7431620 | 2014-07-07 15:16:04 +1000 | [diff] [blame] | 639 | err = wait_on_bit_lock_action(bitlock, NFS_INO_FLUSHING, |
Trond Myklebust | 72cb77f | 2009-03-11 14:10:30 -0400 | [diff] [blame] | 640 | nfs_wait_bit_killable, TASK_KILLABLE); |
| 641 | if (err) |
| 642 | goto out_err; |
| 643 | |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 644 | nfs_inc_stats(inode, NFSIOS_VFSWRITEPAGES); |
| 645 | |
Christoph Hellwig | a20c93e | 2014-04-16 15:07:21 +0200 | [diff] [blame] | 646 | nfs_pageio_init_write(&pgio, inode, wb_priority(wbc), false, |
| 647 | &nfs_async_write_completion_ops); |
Trond Myklebust | f758c885 | 2007-07-22 19:27:32 -0400 | [diff] [blame] | 648 | err = write_cache_pages(mapping, wbc, nfs_writepages_callback, &pgio); |
Trond Myklebust | c63c7b0 | 2007-04-02 19:29:52 -0400 | [diff] [blame] | 649 | nfs_pageio_complete(&pgio); |
Trond Myklebust | 72cb77f | 2009-03-11 14:10:30 -0400 | [diff] [blame] | 650 | |
| 651 | clear_bit_unlock(NFS_INO_FLUSHING, bitlock); |
Peter Zijlstra | 4e857c5 | 2014-03-17 18:06:10 +0100 | [diff] [blame] | 652 | smp_mb__after_atomic(); |
Trond Myklebust | 72cb77f | 2009-03-11 14:10:30 -0400 | [diff] [blame] | 653 | wake_up_bit(bitlock, NFS_INO_FLUSHING); |
| 654 | |
Trond Myklebust | f758c885 | 2007-07-22 19:27:32 -0400 | [diff] [blame] | 655 | if (err < 0) |
Trond Myklebust | 72cb77f | 2009-03-11 14:10:30 -0400 | [diff] [blame] | 656 | goto out_err; |
| 657 | err = pgio.pg_error; |
| 658 | if (err < 0) |
| 659 | goto out_err; |
Trond Myklebust | c63c7b0 | 2007-04-02 19:29:52 -0400 | [diff] [blame] | 660 | return 0; |
Trond Myklebust | 72cb77f | 2009-03-11 14:10:30 -0400 | [diff] [blame] | 661 | out_err: |
| 662 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | } |
| 664 | |
| 665 | /* |
| 666 | * Insert a write request into an inode |
| 667 | */ |
Fred Isaman | d6d6dc7 | 2012-03-08 17:29:35 -0500 | [diff] [blame] | 668 | static void nfs_inode_add_request(struct inode *inode, struct nfs_page *req) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | { |
| 670 | struct nfs_inode *nfsi = NFS_I(inode); |
Trond Myklebust | e7d3906 | 2008-06-13 12:12:32 -0400 | [diff] [blame] | 671 | |
Weston Andros Adamson | 2bfc6e5 | 2014-05-15 11:56:45 -0400 | [diff] [blame] | 672 | WARN_ON_ONCE(req->wb_this_page != req); |
| 673 | |
Trond Myklebust | e7d3906 | 2008-06-13 12:12:32 -0400 | [diff] [blame] | 674 | /* Lock the request! */ |
Trond Myklebust | 7ad84aa | 2012-05-09 13:19:15 -0400 | [diff] [blame] | 675 | nfs_lock_request(req); |
Trond Myklebust | e7d3906 | 2008-06-13 12:12:32 -0400 | [diff] [blame] | 676 | |
| 677 | spin_lock(&inode->i_lock); |
Weston Andros Adamson | cb1410c | 2014-11-12 12:08:00 -0500 | [diff] [blame] | 678 | if (!nfsi->nrequests && |
| 679 | NFS_PROTO(inode)->have_delegation(inode, FMODE_WRITE)) |
Trond Myklebust | a9a4a87 | 2011-10-17 16:08:46 -0700 | [diff] [blame] | 680 | inode->i_version++; |
Mel Gorman | 29418aa | 2012-07-31 16:45:10 -0700 | [diff] [blame] | 681 | /* |
| 682 | * Swap-space should not get truncated. Hence no need to plug the race |
| 683 | * with invalidate/truncate. |
| 684 | */ |
| 685 | if (likely(!PageSwapCache(req->wb_page))) { |
| 686 | set_bit(PG_MAPPED, &req->wb_flags); |
| 687 | SetPagePrivate(req->wb_page); |
| 688 | set_page_private(req->wb_page, (unsigned long)req); |
| 689 | } |
Weston Andros Adamson | cb1410c | 2014-11-12 12:08:00 -0500 | [diff] [blame] | 690 | nfsi->nrequests++; |
Weston Andros Adamson | 17089a2 | 2014-07-11 10:20:45 -0400 | [diff] [blame] | 691 | /* this a head request for a page group - mark it as having an |
Weston Andros Adamson | cb1410c | 2014-11-12 12:08:00 -0500 | [diff] [blame] | 692 | * extra reference so sub groups can follow suit. |
| 693 | * This flag also informs pgio layer when to bump nrequests when |
| 694 | * adding subrequests. */ |
Weston Andros Adamson | 17089a2 | 2014-07-11 10:20:45 -0400 | [diff] [blame] | 695 | WARN_ON(test_and_set_bit(PG_INODE_REF, &req->wb_flags)); |
Trond Myklebust | c03b402 | 2007-06-17 13:26:38 -0400 | [diff] [blame] | 696 | kref_get(&req->wb_kref); |
Trond Myklebust | e7d3906 | 2008-06-13 12:12:32 -0400 | [diff] [blame] | 697 | spin_unlock(&inode->i_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | } |
| 699 | |
| 700 | /* |
Peter Zijlstra | 89a0914 | 2007-03-16 13:38:26 -0800 | [diff] [blame] | 701 | * Remove a write request from an inode |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | */ |
| 703 | static void nfs_inode_remove_request(struct nfs_page *req) |
| 704 | { |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 705 | struct inode *inode = d_inode(req->wb_context->dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | struct nfs_inode *nfsi = NFS_I(inode); |
Weston Andros Adamson | 20633f0 | 2014-05-15 11:56:47 -0400 | [diff] [blame] | 707 | struct nfs_page *head; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | |
Weston Andros Adamson | 20633f0 | 2014-05-15 11:56:47 -0400 | [diff] [blame] | 709 | if (nfs_page_group_sync_on_bit(req, PG_REMOVE)) { |
| 710 | head = req->wb_head; |
| 711 | |
| 712 | spin_lock(&inode->i_lock); |
| 713 | if (likely(!PageSwapCache(head->wb_page))) { |
| 714 | set_page_private(head->wb_page, 0); |
| 715 | ClearPagePrivate(head->wb_page); |
NeilBrown | 9590544 | 2014-09-24 11:28:32 +1000 | [diff] [blame] | 716 | smp_mb__after_atomic(); |
| 717 | wake_up_page(head->wb_page, PG_private); |
Weston Andros Adamson | 20633f0 | 2014-05-15 11:56:47 -0400 | [diff] [blame] | 718 | clear_bit(PG_MAPPED, &head->wb_flags); |
| 719 | } |
Weston Andros Adamson | cb1410c | 2014-11-12 12:08:00 -0500 | [diff] [blame] | 720 | nfsi->nrequests--; |
| 721 | spin_unlock(&inode->i_lock); |
| 722 | } else { |
| 723 | spin_lock(&inode->i_lock); |
| 724 | nfsi->nrequests--; |
Weston Andros Adamson | 20633f0 | 2014-05-15 11:56:47 -0400 | [diff] [blame] | 725 | spin_unlock(&inode->i_lock); |
Mel Gorman | 29418aa | 2012-07-31 16:45:10 -0700 | [diff] [blame] | 726 | } |
Weston Andros Adamson | 17089a2 | 2014-07-11 10:20:45 -0400 | [diff] [blame] | 727 | |
| 728 | if (test_and_clear_bit(PG_INODE_REF, &req->wb_flags)) |
| 729 | nfs_release_request(req); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | } |
| 731 | |
Trond Myklebust | 61822ab | 2006-12-05 00:35:42 -0500 | [diff] [blame] | 732 | static void |
Fred | 6d884e8 | 2008-03-19 11:24:38 -0400 | [diff] [blame] | 733 | nfs_mark_request_dirty(struct nfs_page *req) |
Trond Myklebust | 61822ab | 2006-12-05 00:35:42 -0500 | [diff] [blame] | 734 | { |
Trond Myklebust | 61822ab | 2006-12-05 00:35:42 -0500 | [diff] [blame] | 735 | __set_page_dirty_nobuffers(req->wb_page); |
| 736 | } |
| 737 | |
Trond Myklebust | 3a3908c | 2014-09-08 22:21:00 -0700 | [diff] [blame] | 738 | /* |
| 739 | * nfs_page_search_commits_for_head_request_locked |
| 740 | * |
| 741 | * Search through commit lists on @inode for the head request for @page. |
| 742 | * Must be called while holding the inode (which is cinfo) lock. |
| 743 | * |
| 744 | * Returns the head request if found, or NULL if not found. |
| 745 | */ |
| 746 | static struct nfs_page * |
| 747 | nfs_page_search_commits_for_head_request_locked(struct nfs_inode *nfsi, |
| 748 | struct page *page) |
| 749 | { |
| 750 | struct nfs_page *freq, *t; |
| 751 | struct nfs_commit_info cinfo; |
| 752 | struct inode *inode = &nfsi->vfs_inode; |
| 753 | |
| 754 | nfs_init_cinfo_from_inode(&cinfo, inode); |
| 755 | |
| 756 | /* search through pnfs commit lists */ |
| 757 | freq = pnfs_search_commit_reqs(inode, &cinfo, page); |
| 758 | if (freq) |
| 759 | return freq->wb_head; |
| 760 | |
| 761 | /* Linearly search the commit list for the correct request */ |
| 762 | list_for_each_entry_safe(freq, t, &cinfo.mds->list, wb_list) { |
| 763 | if (freq->wb_page == page) |
| 764 | return freq->wb_head; |
| 765 | } |
| 766 | |
| 767 | return NULL; |
| 768 | } |
| 769 | |
Trond Myklebust | 8dd3775 | 2012-03-15 17:16:40 -0400 | [diff] [blame] | 770 | /** |
| 771 | * nfs_request_add_commit_list - add request to a commit list |
| 772 | * @req: pointer to a struct nfs_page |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 773 | * @dst: commit list head |
| 774 | * @cinfo: holds list lock and accounting info |
Trond Myklebust | 8dd3775 | 2012-03-15 17:16:40 -0400 | [diff] [blame] | 775 | * |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 776 | * This sets the PG_CLEAN bit, updates the cinfo count of |
Trond Myklebust | 8dd3775 | 2012-03-15 17:16:40 -0400 | [diff] [blame] | 777 | * number of outstanding requests requiring a commit as well as |
| 778 | * the MM page stats. |
| 779 | * |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 780 | * The caller must _not_ hold the cinfo->lock, but must be |
Trond Myklebust | 8dd3775 | 2012-03-15 17:16:40 -0400 | [diff] [blame] | 781 | * holding the nfs_page lock. |
| 782 | */ |
| 783 | void |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 784 | nfs_request_add_commit_list(struct nfs_page *req, struct list_head *dst, |
| 785 | struct nfs_commit_info *cinfo) |
Trond Myklebust | 8dd3775 | 2012-03-15 17:16:40 -0400 | [diff] [blame] | 786 | { |
Trond Myklebust | 8dd3775 | 2012-03-15 17:16:40 -0400 | [diff] [blame] | 787 | set_bit(PG_CLEAN, &(req)->wb_flags); |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 788 | spin_lock(cinfo->lock); |
| 789 | nfs_list_add_request(req, dst); |
| 790 | cinfo->mds->ncommit++; |
| 791 | spin_unlock(cinfo->lock); |
Tom Haynes | d15bc38 | 2015-02-13 13:19:53 -0800 | [diff] [blame] | 792 | if (!cinfo->dreq) |
| 793 | nfs_mark_page_unstable(req->wb_page); |
Trond Myklebust | 8dd3775 | 2012-03-15 17:16:40 -0400 | [diff] [blame] | 794 | } |
| 795 | EXPORT_SYMBOL_GPL(nfs_request_add_commit_list); |
| 796 | |
| 797 | /** |
| 798 | * nfs_request_remove_commit_list - Remove request from a commit list |
| 799 | * @req: pointer to a nfs_page |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 800 | * @cinfo: holds list lock and accounting info |
Trond Myklebust | 8dd3775 | 2012-03-15 17:16:40 -0400 | [diff] [blame] | 801 | * |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 802 | * This clears the PG_CLEAN bit, and updates the cinfo's count of |
Trond Myklebust | 8dd3775 | 2012-03-15 17:16:40 -0400 | [diff] [blame] | 803 | * number of outstanding requests requiring a commit |
| 804 | * It does not update the MM page stats. |
| 805 | * |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 806 | * The caller _must_ hold the cinfo->lock and the nfs_page lock. |
Trond Myklebust | 8dd3775 | 2012-03-15 17:16:40 -0400 | [diff] [blame] | 807 | */ |
| 808 | void |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 809 | nfs_request_remove_commit_list(struct nfs_page *req, |
| 810 | struct nfs_commit_info *cinfo) |
Trond Myklebust | 8dd3775 | 2012-03-15 17:16:40 -0400 | [diff] [blame] | 811 | { |
Trond Myklebust | 8dd3775 | 2012-03-15 17:16:40 -0400 | [diff] [blame] | 812 | if (!test_and_clear_bit(PG_CLEAN, &(req)->wb_flags)) |
| 813 | return; |
| 814 | nfs_list_remove_request(req); |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 815 | cinfo->mds->ncommit--; |
Trond Myklebust | 8dd3775 | 2012-03-15 17:16:40 -0400 | [diff] [blame] | 816 | } |
| 817 | EXPORT_SYMBOL_GPL(nfs_request_remove_commit_list); |
| 818 | |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 819 | static void nfs_init_cinfo_from_inode(struct nfs_commit_info *cinfo, |
| 820 | struct inode *inode) |
| 821 | { |
| 822 | cinfo->lock = &inode->i_lock; |
| 823 | cinfo->mds = &NFS_I(inode)->commit_info; |
| 824 | cinfo->ds = pnfs_get_ds_info(inode); |
Fred Isaman | b359f9d | 2012-04-20 14:47:55 -0400 | [diff] [blame] | 825 | cinfo->dreq = NULL; |
Fred Isaman | f453a54 | 2012-04-20 14:47:54 -0400 | [diff] [blame] | 826 | cinfo->completion_ops = &nfs_commit_completion_ops; |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 827 | } |
| 828 | |
| 829 | void nfs_init_cinfo(struct nfs_commit_info *cinfo, |
| 830 | struct inode *inode, |
| 831 | struct nfs_direct_req *dreq) |
| 832 | { |
Fred Isaman | 1763da1 | 2012-04-20 14:47:57 -0400 | [diff] [blame] | 833 | if (dreq) |
| 834 | nfs_init_cinfo_from_dreq(cinfo, dreq); |
| 835 | else |
| 836 | nfs_init_cinfo_from_inode(cinfo, inode); |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 837 | } |
| 838 | EXPORT_SYMBOL_GPL(nfs_init_cinfo); |
Trond Myklebust | 8dd3775 | 2012-03-15 17:16:40 -0400 | [diff] [blame] | 839 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | /* |
| 841 | * Add a request to the inode's commit list. |
| 842 | */ |
Fred Isaman | 1763da1 | 2012-04-20 14:47:57 -0400 | [diff] [blame] | 843 | void |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 844 | nfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, |
Weston Andros Adamson | b57ff13 | 2014-09-05 18:20:21 -0400 | [diff] [blame] | 845 | struct nfs_commit_info *cinfo, u32 ds_commit_idx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | { |
Weston Andros Adamson | b57ff13 | 2014-09-05 18:20:21 -0400 | [diff] [blame] | 847 | if (pnfs_mark_request_commit(req, lseg, cinfo, ds_commit_idx)) |
Trond Myklebust | 8dd3775 | 2012-03-15 17:16:40 -0400 | [diff] [blame] | 848 | return; |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 849 | nfs_request_add_commit_list(req, &cinfo->mds->list, cinfo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | } |
Trond Myklebust | 8e821ca | 2007-04-20 16:12:34 -0400 | [diff] [blame] | 851 | |
Fred Isaman | d6d6dc7 | 2012-03-08 17:29:35 -0500 | [diff] [blame] | 852 | static void |
| 853 | nfs_clear_page_commit(struct page *page) |
| 854 | { |
| 855 | dec_zone_page_state(page, NR_UNSTABLE_NFS); |
Tejun Heo | 93f78d8 | 2015-05-22 17:13:27 -0400 | [diff] [blame] | 856 | dec_wb_stat(&inode_to_bdi(page_file_mapping(page)->host)->wb, |
| 857 | WB_RECLAIMABLE); |
Fred Isaman | d6d6dc7 | 2012-03-08 17:29:35 -0500 | [diff] [blame] | 858 | } |
| 859 | |
Weston Andros Adamson | 411a99a | 2014-07-17 20:42:19 -0400 | [diff] [blame] | 860 | /* Called holding inode (/cinfo) lock */ |
Trond Myklebust | 8dd3775 | 2012-03-15 17:16:40 -0400 | [diff] [blame] | 861 | static void |
Trond Myklebust | e468bae | 2008-06-13 13:25:22 -0400 | [diff] [blame] | 862 | nfs_clear_request_commit(struct nfs_page *req) |
| 863 | { |
Trond Myklebust | 8dd3775 | 2012-03-15 17:16:40 -0400 | [diff] [blame] | 864 | if (test_bit(PG_CLEAN, &req->wb_flags)) { |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 865 | struct inode *inode = d_inode(req->wb_context->dentry); |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 866 | struct nfs_commit_info cinfo; |
Trond Myklebust | e468bae | 2008-06-13 13:25:22 -0400 | [diff] [blame] | 867 | |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 868 | nfs_init_cinfo_from_inode(&cinfo, inode); |
| 869 | if (!pnfs_clear_request_commit(req, &cinfo)) { |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 870 | nfs_request_remove_commit_list(req, &cinfo); |
Trond Myklebust | 8dd3775 | 2012-03-15 17:16:40 -0400 | [diff] [blame] | 871 | } |
Fred Isaman | d6d6dc7 | 2012-03-08 17:29:35 -0500 | [diff] [blame] | 872 | nfs_clear_page_commit(req->wb_page); |
Trond Myklebust | e468bae | 2008-06-13 13:25:22 -0400 | [diff] [blame] | 873 | } |
Trond Myklebust | e468bae | 2008-06-13 13:25:22 -0400 | [diff] [blame] | 874 | } |
| 875 | |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 876 | int nfs_write_need_commit(struct nfs_pgio_header *hdr) |
Trond Myklebust | 8e821ca | 2007-04-20 16:12:34 -0400 | [diff] [blame] | 877 | { |
Weston Andros Adamson | c65e625 | 2014-06-09 11:48:36 -0400 | [diff] [blame] | 878 | if (hdr->verf.committed == NFS_DATA_SYNC) |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 879 | return hdr->lseg == NULL; |
Weston Andros Adamson | c65e625 | 2014-06-09 11:48:36 -0400 | [diff] [blame] | 880 | return hdr->verf.committed != NFS_FILE_SYNC; |
Trond Myklebust | 8e821ca | 2007-04-20 16:12:34 -0400 | [diff] [blame] | 881 | } |
| 882 | |
Fred Isaman | 061ae2e | 2012-04-20 14:47:48 -0400 | [diff] [blame] | 883 | static void nfs_write_completion(struct nfs_pgio_header *hdr) |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 884 | { |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 885 | struct nfs_commit_info cinfo; |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 886 | unsigned long bytes = 0; |
| 887 | |
| 888 | if (test_bit(NFS_IOHDR_REDO, &hdr->flags)) |
| 889 | goto out; |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 890 | nfs_init_cinfo_from_inode(&cinfo, hdr->inode); |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 891 | while (!list_empty(&hdr->pages)) { |
| 892 | struct nfs_page *req = nfs_list_entry(hdr->pages.next); |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 893 | |
| 894 | bytes += req->wb_bytes; |
| 895 | nfs_list_remove_request(req); |
| 896 | if (test_bit(NFS_IOHDR_ERROR, &hdr->flags) && |
| 897 | (hdr->good_bytes < bytes)) { |
Trond Myklebust | d1182b3 | 2012-05-09 13:37:43 -0400 | [diff] [blame] | 898 | nfs_set_pageerror(req->wb_page); |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 899 | nfs_context_set_write_error(req->wb_context, hdr->error); |
| 900 | goto remove_req; |
| 901 | } |
Weston Andros Adamson | c65e625 | 2014-06-09 11:48:36 -0400 | [diff] [blame] | 902 | if (nfs_write_need_commit(hdr)) { |
Anna Schumaker | f79d06f | 2014-05-06 09:12:28 -0400 | [diff] [blame] | 903 | memcpy(&req->wb_verf, &hdr->verf.verifier, sizeof(req->wb_verf)); |
Weston Andros Adamson | b57ff13 | 2014-09-05 18:20:21 -0400 | [diff] [blame] | 904 | nfs_mark_request_commit(req, hdr->lseg, &cinfo, |
Weston Andros Adamson | a7d42dd | 2014-09-19 10:55:07 -0400 | [diff] [blame] | 905 | hdr->pgio_mirror_idx); |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 906 | goto next; |
| 907 | } |
| 908 | remove_req: |
| 909 | nfs_inode_remove_request(req); |
| 910 | next: |
Trond Myklebust | 1d1afcb | 2012-05-09 14:04:55 -0400 | [diff] [blame] | 911 | nfs_unlock_request(req); |
Weston Andros Adamson | 20633f0 | 2014-05-15 11:56:47 -0400 | [diff] [blame] | 912 | nfs_end_page_writeback(req); |
Trond Myklebust | 3aff4eb | 2012-05-09 14:30:35 -0400 | [diff] [blame] | 913 | nfs_release_request(req); |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 914 | } |
| 915 | out: |
| 916 | hdr->release(hdr); |
| 917 | } |
| 918 | |
Anna Schumaker | ce59515 | 2014-05-06 09:12:34 -0400 | [diff] [blame] | 919 | unsigned long |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 920 | nfs_reqs_to_commit(struct nfs_commit_info *cinfo) |
Trond Myklebust | fb8a1f1 | 2009-03-11 14:10:29 -0400 | [diff] [blame] | 921 | { |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 922 | return cinfo->mds->ncommit; |
Trond Myklebust | fb8a1f1 | 2009-03-11 14:10:29 -0400 | [diff] [blame] | 923 | } |
| 924 | |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 925 | /* cinfo->lock held by caller */ |
Fred Isaman | 1763da1 | 2012-04-20 14:47:57 -0400 | [diff] [blame] | 926 | int |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 927 | nfs_scan_commit_list(struct list_head *src, struct list_head *dst, |
| 928 | struct nfs_commit_info *cinfo, int max) |
Fred Isaman | d6d6dc7 | 2012-03-08 17:29:35 -0500 | [diff] [blame] | 929 | { |
| 930 | struct nfs_page *req, *tmp; |
| 931 | int ret = 0; |
| 932 | |
| 933 | list_for_each_entry_safe(req, tmp, src, wb_list) { |
Trond Myklebust | 8dd3775 | 2012-03-15 17:16:40 -0400 | [diff] [blame] | 934 | if (!nfs_lock_request(req)) |
| 935 | continue; |
Trond Myklebust | 7ad84aa | 2012-05-09 13:19:15 -0400 | [diff] [blame] | 936 | kref_get(&req->wb_kref); |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 937 | if (cond_resched_lock(cinfo->lock)) |
Trond Myklebust | 3b3be88 | 2012-03-17 11:59:30 -0400 | [diff] [blame] | 938 | list_safe_reset_next(req, tmp, wb_list); |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 939 | nfs_request_remove_commit_list(req, cinfo); |
Trond Myklebust | 8dd3775 | 2012-03-15 17:16:40 -0400 | [diff] [blame] | 940 | nfs_list_add_request(req, dst); |
| 941 | ret++; |
Fred Isaman | 1763da1 | 2012-04-20 14:47:57 -0400 | [diff] [blame] | 942 | if ((ret == max) && !cinfo->dreq) |
Trond Myklebust | 8dd3775 | 2012-03-15 17:16:40 -0400 | [diff] [blame] | 943 | break; |
Fred Isaman | d6d6dc7 | 2012-03-08 17:29:35 -0500 | [diff] [blame] | 944 | } |
| 945 | return ret; |
| 946 | } |
Fred Isaman | d6d6dc7 | 2012-03-08 17:29:35 -0500 | [diff] [blame] | 947 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 948 | /* |
| 949 | * nfs_scan_commit - Scan an inode for commit requests |
| 950 | * @inode: NFS inode to scan |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 951 | * @dst: mds destination list |
| 952 | * @cinfo: mds and ds lists of reqs ready to commit |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | * |
| 954 | * Moves requests from the inode's 'commit' request list. |
| 955 | * The requests are *not* checked to ensure that they form a contiguous set. |
| 956 | */ |
Fred Isaman | 1763da1 | 2012-04-20 14:47:57 -0400 | [diff] [blame] | 957 | int |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 958 | nfs_scan_commit(struct inode *inode, struct list_head *dst, |
| 959 | struct nfs_commit_info *cinfo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 960 | { |
Fred Isaman | d6d6dc7 | 2012-03-08 17:29:35 -0500 | [diff] [blame] | 961 | int ret = 0; |
Trond Myklebust | fb8a1f1 | 2009-03-11 14:10:29 -0400 | [diff] [blame] | 962 | |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 963 | spin_lock(cinfo->lock); |
| 964 | if (cinfo->mds->ncommit > 0) { |
Trond Myklebust | 8dd3775 | 2012-03-15 17:16:40 -0400 | [diff] [blame] | 965 | const int max = INT_MAX; |
Fred Isaman | d6d6dc7 | 2012-03-08 17:29:35 -0500 | [diff] [blame] | 966 | |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 967 | ret = nfs_scan_commit_list(&cinfo->mds->list, dst, |
| 968 | cinfo, max); |
| 969 | ret += pnfs_scan_commit_lists(inode, cinfo, max - ret); |
Fred Isaman | d6d6dc7 | 2012-03-08 17:29:35 -0500 | [diff] [blame] | 970 | } |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 971 | spin_unlock(cinfo->lock); |
Trond Myklebust | ff778d0 | 2010-02-19 16:53:39 -0800 | [diff] [blame] | 972 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 973 | } |
Fred Isaman | d6d6dc7 | 2012-03-08 17:29:35 -0500 | [diff] [blame] | 974 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | /* |
Trond Myklebust | e7d3906 | 2008-06-13 12:12:32 -0400 | [diff] [blame] | 976 | * Search for an existing write request, and attempt to update |
| 977 | * it to reflect a new dirty region on a given page. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | * |
Trond Myklebust | e7d3906 | 2008-06-13 12:12:32 -0400 | [diff] [blame] | 979 | * If the attempt fails, then the existing request is flushed out |
| 980 | * to disk. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 981 | */ |
Trond Myklebust | e7d3906 | 2008-06-13 12:12:32 -0400 | [diff] [blame] | 982 | static struct nfs_page *nfs_try_to_update_request(struct inode *inode, |
| 983 | struct page *page, |
| 984 | unsigned int offset, |
| 985 | unsigned int bytes) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 986 | { |
Trond Myklebust | e7d3906 | 2008-06-13 12:12:32 -0400 | [diff] [blame] | 987 | struct nfs_page *req; |
| 988 | unsigned int rqend; |
| 989 | unsigned int end; |
| 990 | int error; |
| 991 | |
| 992 | if (!PagePrivate(page)) |
| 993 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 994 | |
| 995 | end = offset + bytes; |
Trond Myklebust | e7d3906 | 2008-06-13 12:12:32 -0400 | [diff] [blame] | 996 | spin_lock(&inode->i_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 997 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | for (;;) { |
Weston Andros Adamson | 84d3a9a | 2014-07-11 10:20:47 -0400 | [diff] [blame] | 999 | req = nfs_page_find_head_request_locked(NFS_I(inode), page); |
Trond Myklebust | e7d3906 | 2008-06-13 12:12:32 -0400 | [diff] [blame] | 1000 | if (req == NULL) |
| 1001 | goto out_unlock; |
Trond Myklebust | 277459d | 2006-12-05 00:35:35 -0500 | [diff] [blame] | 1002 | |
Weston Andros Adamson | 2bfc6e5 | 2014-05-15 11:56:45 -0400 | [diff] [blame] | 1003 | /* should be handled by nfs_flush_incompatible */ |
| 1004 | WARN_ON_ONCE(req->wb_head != req); |
| 1005 | WARN_ON_ONCE(req->wb_this_page != req); |
| 1006 | |
Trond Myklebust | e7d3906 | 2008-06-13 12:12:32 -0400 | [diff] [blame] | 1007 | rqend = req->wb_offset + req->wb_bytes; |
| 1008 | /* |
| 1009 | * Tell the caller to flush out the request if |
| 1010 | * the offsets are non-contiguous. |
| 1011 | * Note: nfs_flush_incompatible() will already |
| 1012 | * have flushed out requests having wrong owners. |
| 1013 | */ |
Trond Myklebust | e468bae | 2008-06-13 13:25:22 -0400 | [diff] [blame] | 1014 | if (offset > rqend |
Trond Myklebust | e7d3906 | 2008-06-13 12:12:32 -0400 | [diff] [blame] | 1015 | || end < req->wb_offset) |
| 1016 | goto out_flushme; |
| 1017 | |
Trond Myklebust | 7ad84aa | 2012-05-09 13:19:15 -0400 | [diff] [blame] | 1018 | if (nfs_lock_request(req)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | |
Trond Myklebust | e7d3906 | 2008-06-13 12:12:32 -0400 | [diff] [blame] | 1021 | /* The request is locked, so wait and then retry */ |
Trond Myklebust | 587142f | 2007-07-02 09:57:54 -0400 | [diff] [blame] | 1022 | spin_unlock(&inode->i_lock); |
Trond Myklebust | e7d3906 | 2008-06-13 12:12:32 -0400 | [diff] [blame] | 1023 | error = nfs_wait_on_request(req); |
| 1024 | nfs_release_request(req); |
| 1025 | if (error != 0) |
| 1026 | goto out_err; |
| 1027 | spin_lock(&inode->i_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1028 | } |
| 1029 | |
| 1030 | /* Okay, the request matches. Update the region */ |
| 1031 | if (offset < req->wb_offset) { |
| 1032 | req->wb_offset = offset; |
| 1033 | req->wb_pgbase = offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1034 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1035 | if (end > rqend) |
| 1036 | req->wb_bytes = end - req->wb_offset; |
Trond Myklebust | e7d3906 | 2008-06-13 12:12:32 -0400 | [diff] [blame] | 1037 | else |
| 1038 | req->wb_bytes = rqend - req->wb_offset; |
| 1039 | out_unlock: |
Fred Isaman | ca138f3 | 2012-04-05 15:26:36 -0400 | [diff] [blame] | 1040 | if (req) |
| 1041 | nfs_clear_request_commit(req); |
Weston Andros Adamson | 411a99a | 2014-07-17 20:42:19 -0400 | [diff] [blame] | 1042 | spin_unlock(&inode->i_lock); |
Trond Myklebust | e7d3906 | 2008-06-13 12:12:32 -0400 | [diff] [blame] | 1043 | return req; |
| 1044 | out_flushme: |
| 1045 | spin_unlock(&inode->i_lock); |
| 1046 | nfs_release_request(req); |
| 1047 | error = nfs_wb_page(inode, page); |
| 1048 | out_err: |
| 1049 | return ERR_PTR(error); |
| 1050 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | |
Trond Myklebust | e7d3906 | 2008-06-13 12:12:32 -0400 | [diff] [blame] | 1052 | /* |
| 1053 | * Try to update an existing write request, or create one if there is none. |
| 1054 | * |
| 1055 | * Note: Should always be called with the Page Lock held to prevent races |
| 1056 | * if we have to add a new request. Also assumes that the caller has |
| 1057 | * already called nfs_flush_incompatible() if necessary. |
| 1058 | */ |
| 1059 | static struct nfs_page * nfs_setup_write_request(struct nfs_open_context* ctx, |
| 1060 | struct page *page, unsigned int offset, unsigned int bytes) |
| 1061 | { |
Mel Gorman | d56b4dd | 2012-07-31 16:45:06 -0700 | [diff] [blame] | 1062 | struct inode *inode = page_file_mapping(page)->host; |
Trond Myklebust | e7d3906 | 2008-06-13 12:12:32 -0400 | [diff] [blame] | 1063 | struct nfs_page *req; |
Trond Myklebust | e7d3906 | 2008-06-13 12:12:32 -0400 | [diff] [blame] | 1064 | |
| 1065 | req = nfs_try_to_update_request(inode, page, offset, bytes); |
| 1066 | if (req != NULL) |
| 1067 | goto out; |
Weston Andros Adamson | 2bfc6e5 | 2014-05-15 11:56:45 -0400 | [diff] [blame] | 1068 | req = nfs_create_request(ctx, page, NULL, offset, bytes); |
Trond Myklebust | e7d3906 | 2008-06-13 12:12:32 -0400 | [diff] [blame] | 1069 | if (IS_ERR(req)) |
| 1070 | goto out; |
Fred Isaman | d6d6dc7 | 2012-03-08 17:29:35 -0500 | [diff] [blame] | 1071 | nfs_inode_add_request(inode, req); |
Trond Myklebust | efc91ed | 2008-06-10 18:31:00 -0400 | [diff] [blame] | 1072 | out: |
Trond Myklebust | 61e930a | 2007-10-18 17:08:05 -0400 | [diff] [blame] | 1073 | return req; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1074 | } |
| 1075 | |
Trond Myklebust | e7d3906 | 2008-06-13 12:12:32 -0400 | [diff] [blame] | 1076 | static int nfs_writepage_setup(struct nfs_open_context *ctx, struct page *page, |
| 1077 | unsigned int offset, unsigned int count) |
| 1078 | { |
| 1079 | struct nfs_page *req; |
| 1080 | |
| 1081 | req = nfs_setup_write_request(ctx, page, offset, count); |
| 1082 | if (IS_ERR(req)) |
| 1083 | return PTR_ERR(req); |
| 1084 | /* Update file length */ |
| 1085 | nfs_grow_file(page, offset, count); |
Weston Andros Adamson | d72ddcb | 2014-05-15 11:56:48 -0400 | [diff] [blame] | 1086 | nfs_mark_uptodate(req); |
Trond Myklebust | a6305dd | 2010-04-09 19:07:08 -0400 | [diff] [blame] | 1087 | nfs_mark_request_dirty(req); |
Trond Myklebust | 1d1afcb | 2012-05-09 14:04:55 -0400 | [diff] [blame] | 1088 | nfs_unlock_and_release_request(req); |
Trond Myklebust | e7d3906 | 2008-06-13 12:12:32 -0400 | [diff] [blame] | 1089 | return 0; |
| 1090 | } |
| 1091 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1092 | int nfs_flush_incompatible(struct file *file, struct page *page) |
| 1093 | { |
Trond Myklebust | cd3758e | 2007-08-10 17:44:32 -0400 | [diff] [blame] | 1094 | struct nfs_open_context *ctx = nfs_file_open_context(file); |
Trond Myklebust | 2a36915 | 2012-08-13 18:54:45 -0400 | [diff] [blame] | 1095 | struct nfs_lock_context *l_ctx; |
Jeff Layton | bd61e0a | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1096 | struct file_lock_context *flctx = file_inode(file)->i_flctx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1097 | struct nfs_page *req; |
Trond Myklebust | 1a54533 | 2006-12-05 00:35:40 -0500 | [diff] [blame] | 1098 | int do_flush, status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1099 | /* |
| 1100 | * Look for a request corresponding to this page. If there |
| 1101 | * is one, and it belongs to another file, we flush it out |
| 1102 | * before we try to copy anything into the page. Do this |
| 1103 | * due to the lack of an ACCESS-type call in NFSv2. |
| 1104 | * Also do the same if we find a request from an existing |
| 1105 | * dropped page. |
| 1106 | */ |
Trond Myklebust | 1a54533 | 2006-12-05 00:35:40 -0500 | [diff] [blame] | 1107 | do { |
Weston Andros Adamson | 84d3a9a | 2014-07-11 10:20:47 -0400 | [diff] [blame] | 1108 | req = nfs_page_find_head_request(page); |
Trond Myklebust | 1a54533 | 2006-12-05 00:35:40 -0500 | [diff] [blame] | 1109 | if (req == NULL) |
| 1110 | return 0; |
Trond Myklebust | 2a36915 | 2012-08-13 18:54:45 -0400 | [diff] [blame] | 1111 | l_ctx = req->wb_lock_context; |
| 1112 | do_flush = req->wb_page != page || req->wb_context != ctx; |
Weston Andros Adamson | 2bfc6e5 | 2014-05-15 11:56:45 -0400 | [diff] [blame] | 1113 | /* for now, flush if more than 1 request in page_group */ |
| 1114 | do_flush |= req->wb_this_page != req; |
Jeff Layton | bd61e0a | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1115 | if (l_ctx && flctx && |
| 1116 | !(list_empty_careful(&flctx->flc_posix) && |
| 1117 | list_empty_careful(&flctx->flc_flock))) { |
Jeff Layton | 5263e31 | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1118 | do_flush |= l_ctx->lockowner.l_owner != current->files |
| 1119 | || l_ctx->lockowner.l_pid != current->tgid; |
| 1120 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1121 | nfs_release_request(req); |
Trond Myklebust | 1a54533 | 2006-12-05 00:35:40 -0500 | [diff] [blame] | 1122 | if (!do_flush) |
| 1123 | return 0; |
Mel Gorman | d56b4dd | 2012-07-31 16:45:06 -0700 | [diff] [blame] | 1124 | status = nfs_wb_page(page_file_mapping(page)->host, page); |
Trond Myklebust | 1a54533 | 2006-12-05 00:35:40 -0500 | [diff] [blame] | 1125 | } while (status == 0); |
| 1126 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | } |
| 1128 | |
| 1129 | /* |
Andy Adamson | dc24826 | 2013-08-14 11:59:16 -0400 | [diff] [blame] | 1130 | * Avoid buffered writes when a open context credential's key would |
| 1131 | * expire soon. |
| 1132 | * |
| 1133 | * Returns -EACCES if the key will expire within RPC_KEY_EXPIRE_FAIL. |
| 1134 | * |
| 1135 | * Return 0 and set a credential flag which triggers the inode to flush |
| 1136 | * and performs NFS_FILE_SYNC writes if the key will expired within |
| 1137 | * RPC_KEY_EXPIRE_TIMEO. |
| 1138 | */ |
| 1139 | int |
| 1140 | nfs_key_timeout_notify(struct file *filp, struct inode *inode) |
| 1141 | { |
| 1142 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
| 1143 | struct rpc_auth *auth = NFS_SERVER(inode)->client->cl_auth; |
| 1144 | |
| 1145 | return rpcauth_key_timeout_notify(auth, ctx->cred); |
| 1146 | } |
| 1147 | |
| 1148 | /* |
| 1149 | * Test if the open context credential key is marked to expire soon. |
| 1150 | */ |
| 1151 | bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx) |
| 1152 | { |
| 1153 | return rpcauth_cred_key_to_expire(ctx->cred); |
| 1154 | } |
| 1155 | |
| 1156 | /* |
Trond Myklebust | 5d47a35 | 2008-02-07 17:24:07 -0500 | [diff] [blame] | 1157 | * If the page cache is marked as unsafe or invalid, then we can't rely on |
| 1158 | * the PageUptodate() flag. In this case, we will need to turn off |
| 1159 | * write optimisations that depend on the page contents being correct. |
| 1160 | */ |
Trond Myklebust | 8d197a5 | 2012-04-29 12:50:01 -0400 | [diff] [blame] | 1161 | static bool nfs_write_pageuptodate(struct page *page, struct inode *inode) |
Trond Myklebust | 5d47a35 | 2008-02-07 17:24:07 -0500 | [diff] [blame] | 1162 | { |
Jeff Layton | d529ef8 | 2014-01-27 13:46:15 -0500 | [diff] [blame] | 1163 | struct nfs_inode *nfsi = NFS_I(inode); |
| 1164 | |
Trond Myklebust | 8d197a5 | 2012-04-29 12:50:01 -0400 | [diff] [blame] | 1165 | if (nfs_have_delegated_attributes(inode)) |
| 1166 | goto out; |
Scott Mayhew | 18dd78c | 2014-06-20 08:44:42 -0400 | [diff] [blame] | 1167 | if (nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) |
Jeff Layton | d529ef8 | 2014-01-27 13:46:15 -0500 | [diff] [blame] | 1168 | return false; |
Jeff Layton | 4db72b4 | 2014-01-28 13:47:46 -0500 | [diff] [blame] | 1169 | smp_rmb(); |
Jeff Layton | d529ef8 | 2014-01-27 13:46:15 -0500 | [diff] [blame] | 1170 | if (test_bit(NFS_INO_INVALIDATING, &nfsi->flags)) |
Trond Myklebust | 8d197a5 | 2012-04-29 12:50:01 -0400 | [diff] [blame] | 1171 | return false; |
| 1172 | out: |
Scott Mayhew | 18dd78c | 2014-06-20 08:44:42 -0400 | [diff] [blame] | 1173 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) |
| 1174 | return false; |
Trond Myklebust | 8d197a5 | 2012-04-29 12:50:01 -0400 | [diff] [blame] | 1175 | return PageUptodate(page) != 0; |
Trond Myklebust | 5d47a35 | 2008-02-07 17:24:07 -0500 | [diff] [blame] | 1176 | } |
| 1177 | |
Jeff Layton | 5263e31 | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1178 | static bool |
| 1179 | is_whole_file_wrlock(struct file_lock *fl) |
| 1180 | { |
| 1181 | return fl->fl_start == 0 && fl->fl_end == OFFSET_MAX && |
| 1182 | fl->fl_type == F_WRLCK; |
| 1183 | } |
| 1184 | |
Scott Mayhew | c755966 | 2013-07-05 17:33:19 -0400 | [diff] [blame] | 1185 | /* If we know the page is up to date, and we're not using byte range locks (or |
| 1186 | * if we have the whole file locked for writing), it may be more efficient to |
| 1187 | * extend the write to cover the entire page in order to avoid fragmentation |
| 1188 | * inefficiencies. |
| 1189 | * |
Scott Mayhew | 263b450 | 2014-01-17 15:12:05 -0500 | [diff] [blame] | 1190 | * If the file is opened for synchronous writes then we can just skip the rest |
| 1191 | * of the checks. |
Scott Mayhew | c755966 | 2013-07-05 17:33:19 -0400 | [diff] [blame] | 1192 | */ |
| 1193 | static int nfs_can_extend_write(struct file *file, struct page *page, struct inode *inode) |
| 1194 | { |
Jeff Layton | 5263e31 | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1195 | int ret; |
| 1196 | struct file_lock_context *flctx = inode->i_flctx; |
| 1197 | struct file_lock *fl; |
| 1198 | |
Scott Mayhew | c755966 | 2013-07-05 17:33:19 -0400 | [diff] [blame] | 1199 | if (file->f_flags & O_DSYNC) |
| 1200 | return 0; |
Scott Mayhew | 263b450 | 2014-01-17 15:12:05 -0500 | [diff] [blame] | 1201 | if (!nfs_write_pageuptodate(page, inode)) |
| 1202 | return 0; |
Scott Mayhew | c755966 | 2013-07-05 17:33:19 -0400 | [diff] [blame] | 1203 | if (NFS_PROTO(inode)->have_delegation(inode, FMODE_WRITE)) |
| 1204 | return 1; |
Jeff Layton | bd61e0a | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1205 | if (!flctx || (list_empty_careful(&flctx->flc_flock) && |
| 1206 | list_empty_careful(&flctx->flc_posix))) |
Jeff Layton | 5263e31 | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1207 | return 0; |
| 1208 | |
| 1209 | /* Check to see if there are whole file write locks */ |
Jeff Layton | 5263e31 | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1210 | ret = 0; |
Jeff Layton | 6109c85 | 2015-01-16 15:05:57 -0500 | [diff] [blame] | 1211 | spin_lock(&flctx->flc_lock); |
Jeff Layton | bd61e0a | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1212 | if (!list_empty(&flctx->flc_posix)) { |
| 1213 | fl = list_first_entry(&flctx->flc_posix, struct file_lock, |
| 1214 | fl_list); |
| 1215 | if (is_whole_file_wrlock(fl)) |
| 1216 | ret = 1; |
| 1217 | } else if (!list_empty(&flctx->flc_flock)) { |
Jeff Layton | 5263e31 | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1218 | fl = list_first_entry(&flctx->flc_flock, struct file_lock, |
| 1219 | fl_list); |
| 1220 | if (fl->fl_type == F_WRLCK) |
| 1221 | ret = 1; |
| 1222 | } |
Jeff Layton | 6109c85 | 2015-01-16 15:05:57 -0500 | [diff] [blame] | 1223 | spin_unlock(&flctx->flc_lock); |
Jeff Layton | 5263e31 | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1224 | return ret; |
Scott Mayhew | c755966 | 2013-07-05 17:33:19 -0400 | [diff] [blame] | 1225 | } |
| 1226 | |
Trond Myklebust | 5d47a35 | 2008-02-07 17:24:07 -0500 | [diff] [blame] | 1227 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1228 | * Update and possibly write a cached page of an NFS file. |
| 1229 | * |
| 1230 | * XXX: Keep an eye on generic_file_read to make sure it doesn't do bad |
| 1231 | * things with a page scheduled for an RPC call (e.g. invalidate it). |
| 1232 | */ |
| 1233 | int nfs_updatepage(struct file *file, struct page *page, |
| 1234 | unsigned int offset, unsigned int count) |
| 1235 | { |
Trond Myklebust | cd3758e | 2007-08-10 17:44:32 -0400 | [diff] [blame] | 1236 | struct nfs_open_context *ctx = nfs_file_open_context(file); |
Mel Gorman | d56b4dd | 2012-07-31 16:45:06 -0700 | [diff] [blame] | 1237 | struct inode *inode = page_file_mapping(page)->host; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1238 | int status = 0; |
| 1239 | |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 1240 | nfs_inc_stats(inode, NFSIOS_VFSUPDATEPAGE); |
| 1241 | |
Al Viro | 6de1472 | 2013-09-16 10:53:17 -0400 | [diff] [blame] | 1242 | dprintk("NFS: nfs_updatepage(%pD2 %d@%lld)\n", |
| 1243 | file, count, (long long)(page_file_offset(page) + offset)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1244 | |
Scott Mayhew | c755966 | 2013-07-05 17:33:19 -0400 | [diff] [blame] | 1245 | if (nfs_can_extend_write(file, page, inode)) { |
Trond Myklebust | 49a70f2 | 2006-12-05 00:35:38 -0500 | [diff] [blame] | 1246 | count = max(count + offset, nfs_page_length(page)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1247 | offset = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1248 | } |
| 1249 | |
Trond Myklebust | e21195a | 2006-12-05 00:35:39 -0500 | [diff] [blame] | 1250 | status = nfs_writepage_setup(ctx, page, offset, count); |
Trond Myklebust | 03fa9e8 | 2008-06-05 16:02:35 -0400 | [diff] [blame] | 1251 | if (status < 0) |
| 1252 | nfs_set_pageerror(page); |
Trond Myklebust | 59b7c05 | 2011-10-17 18:22:55 -0700 | [diff] [blame] | 1253 | else |
| 1254 | __set_page_dirty_nobuffers(page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1255 | |
Chuck Lever | 48186c7 | 2008-06-11 17:56:05 -0400 | [diff] [blame] | 1256 | dprintk("NFS: nfs_updatepage returns %d (isize %lld)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1257 | status, (long long)i_size_read(inode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1258 | return status; |
| 1259 | } |
| 1260 | |
Trond Myklebust | 3ff7576 | 2007-07-14 15:40:00 -0400 | [diff] [blame] | 1261 | static int flush_task_priority(int how) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1262 | { |
| 1263 | switch (how & (FLUSH_HIGHPRI|FLUSH_LOWPRI)) { |
| 1264 | case FLUSH_HIGHPRI: |
| 1265 | return RPC_PRIORITY_HIGH; |
| 1266 | case FLUSH_LOWPRI: |
| 1267 | return RPC_PRIORITY_LOW; |
| 1268 | } |
| 1269 | return RPC_PRIORITY_NORMAL; |
| 1270 | } |
| 1271 | |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1272 | static void nfs_initiate_write(struct nfs_pgio_header *hdr, |
| 1273 | struct rpc_message *msg, |
Tom Haynes | abde71f | 2014-06-09 13:12:20 -0700 | [diff] [blame] | 1274 | const struct nfs_rpc_ops *rpc_ops, |
Anna Schumaker | 1ed26f3 | 2014-05-06 09:12:37 -0400 | [diff] [blame] | 1275 | struct rpc_task_setup *task_setup_data, int how) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1276 | { |
Trond Myklebust | 3ff7576 | 2007-07-14 15:40:00 -0400 | [diff] [blame] | 1277 | int priority = flush_task_priority(how); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1278 | |
Anna Schumaker | 1ed26f3 | 2014-05-06 09:12:37 -0400 | [diff] [blame] | 1279 | task_setup_data->priority = priority; |
Tom Haynes | abde71f | 2014-06-09 13:12:20 -0700 | [diff] [blame] | 1280 | rpc_ops->write_setup(hdr, msg); |
Andy Adamson | d138d5d | 2011-03-03 15:13:41 +0000 | [diff] [blame] | 1281 | |
Tom Haynes | abde71f | 2014-06-09 13:12:20 -0700 | [diff] [blame] | 1282 | nfs4_state_protect_write(NFS_SERVER(hdr->inode)->nfs_client, |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1283 | &task_setup_data->rpc_client, msg, hdr); |
Trond Myklebust | 275acaa | 2011-07-12 13:42:02 -0400 | [diff] [blame] | 1284 | } |
| 1285 | |
Fred | 6d884e8 | 2008-03-19 11:24:38 -0400 | [diff] [blame] | 1286 | /* If a nfs_flush_* function fails, it should remove reqs from @head and |
| 1287 | * call this on each, which will prepare them to be retried on next |
| 1288 | * writeback using standard nfs. |
| 1289 | */ |
| 1290 | static void nfs_redirty_request(struct nfs_page *req) |
| 1291 | { |
| 1292 | nfs_mark_request_dirty(req); |
Trond Myklebust | c707011 | 2015-06-17 19:56:22 -0400 | [diff] [blame] | 1293 | set_bit(NFS_CONTEXT_RESEND_WRITES, &req->wb_context->flags); |
Trond Myklebust | 1d1afcb | 2012-05-09 14:04:55 -0400 | [diff] [blame] | 1294 | nfs_unlock_request(req); |
Weston Andros Adamson | 20633f0 | 2014-05-15 11:56:47 -0400 | [diff] [blame] | 1295 | nfs_end_page_writeback(req); |
Trond Myklebust | 3aff4eb | 2012-05-09 14:30:35 -0400 | [diff] [blame] | 1296 | nfs_release_request(req); |
Fred | 6d884e8 | 2008-03-19 11:24:38 -0400 | [diff] [blame] | 1297 | } |
| 1298 | |
Fred Isaman | 061ae2e | 2012-04-20 14:47:48 -0400 | [diff] [blame] | 1299 | static void nfs_async_write_error(struct list_head *head) |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1300 | { |
| 1301 | struct nfs_page *req; |
| 1302 | |
| 1303 | while (!list_empty(head)) { |
| 1304 | req = nfs_list_entry(head->next); |
| 1305 | nfs_list_remove_request(req); |
| 1306 | nfs_redirty_request(req); |
| 1307 | } |
| 1308 | } |
| 1309 | |
Fred Isaman | 061ae2e | 2012-04-20 14:47:48 -0400 | [diff] [blame] | 1310 | static const struct nfs_pgio_completion_ops nfs_async_write_completion_ops = { |
| 1311 | .error_cleanup = nfs_async_write_error, |
| 1312 | .completion = nfs_write_completion, |
| 1313 | }; |
| 1314 | |
Bryan Schumaker | 57208fa | 2012-06-20 15:53:48 -0400 | [diff] [blame] | 1315 | void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, |
Christoph Hellwig | a20c93e | 2014-04-16 15:07:21 +0200 | [diff] [blame] | 1316 | struct inode *inode, int ioflags, bool force_mds, |
Fred Isaman | 061ae2e | 2012-04-20 14:47:48 -0400 | [diff] [blame] | 1317 | const struct nfs_pgio_completion_ops *compl_ops) |
Trond Myklebust | 1751c36 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1318 | { |
Christoph Hellwig | a20c93e | 2014-04-16 15:07:21 +0200 | [diff] [blame] | 1319 | struct nfs_server *server = NFS_SERVER(inode); |
Anna Schumaker | 41d8d5b | 2014-05-06 09:12:40 -0400 | [diff] [blame] | 1320 | const struct nfs_pageio_ops *pg_ops = &nfs_pgio_rw_ops; |
Christoph Hellwig | a20c93e | 2014-04-16 15:07:21 +0200 | [diff] [blame] | 1321 | |
| 1322 | #ifdef CONFIG_NFS_V4_1 |
| 1323 | if (server->pnfs_curr_ld && !force_mds) |
| 1324 | pg_ops = server->pnfs_curr_ld->pg_write_ops; |
| 1325 | #endif |
Anna Schumaker | 4a0de55 | 2014-05-06 09:12:30 -0400 | [diff] [blame] | 1326 | nfs_pageio_init(pgio, inode, pg_ops, compl_ops, &nfs_rw_write_ops, |
| 1327 | server->wsize, ioflags); |
Trond Myklebust | 1751c36 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1328 | } |
Bryan Schumaker | ddda8e0 | 2012-07-30 16:05:23 -0400 | [diff] [blame] | 1329 | EXPORT_SYMBOL_GPL(nfs_pageio_init_write); |
Trond Myklebust | 1751c36 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1330 | |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1331 | void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio) |
| 1332 | { |
Weston Andros Adamson | a7d42dd | 2014-09-19 10:55:07 -0400 | [diff] [blame] | 1333 | struct nfs_pgio_mirror *mirror; |
| 1334 | |
Anna Schumaker | 41d8d5b | 2014-05-06 09:12:40 -0400 | [diff] [blame] | 1335 | pgio->pg_ops = &nfs_pgio_rw_ops; |
Weston Andros Adamson | a7d42dd | 2014-09-19 10:55:07 -0400 | [diff] [blame] | 1336 | |
| 1337 | nfs_pageio_stop_mirroring(pgio); |
| 1338 | |
| 1339 | mirror = &pgio->pg_mirrors[0]; |
| 1340 | mirror->pg_bsize = NFS_SERVER(pgio->pg_inode)->wsize; |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1341 | } |
Trond Myklebust | 1f94535 | 2011-07-13 15:59:57 -0400 | [diff] [blame] | 1342 | EXPORT_SYMBOL_GPL(nfs_pageio_reset_write_mds); |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1343 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1344 | |
Fred Isaman | 0b7c015 | 2012-04-20 14:47:39 -0400 | [diff] [blame] | 1345 | void nfs_commit_prepare(struct rpc_task *task, void *calldata) |
| 1346 | { |
| 1347 | struct nfs_commit_data *data = calldata; |
| 1348 | |
| 1349 | NFS_PROTO(data->inode)->commit_rpc_prepare(task, data); |
| 1350 | } |
| 1351 | |
Trond Myklebust | 1f2edbe | 2014-04-13 11:11:31 -0400 | [diff] [blame] | 1352 | /* |
| 1353 | * Special version of should_remove_suid() that ignores capabilities. |
| 1354 | */ |
| 1355 | static int nfs_should_remove_suid(const struct inode *inode) |
| 1356 | { |
| 1357 | umode_t mode = inode->i_mode; |
| 1358 | int kill = 0; |
Trond Myklebust | 788e7a8 | 2006-03-20 13:44:27 -0500 | [diff] [blame] | 1359 | |
Trond Myklebust | 1f2edbe | 2014-04-13 11:11:31 -0400 | [diff] [blame] | 1360 | /* suid always must be killed */ |
| 1361 | if (unlikely(mode & S_ISUID)) |
| 1362 | kill = ATTR_KILL_SUID; |
| 1363 | |
| 1364 | /* |
| 1365 | * sgid without any exec bits is just a mandatory locking mark; leave |
| 1366 | * it alone. If some exec bits are set, it's a real sgid; kill it. |
| 1367 | */ |
| 1368 | if (unlikely((mode & S_ISGID) && (mode & S_IXGRP))) |
| 1369 | kill |= ATTR_KILL_SGID; |
| 1370 | |
| 1371 | if (unlikely(kill && S_ISREG(mode))) |
| 1372 | return kill; |
| 1373 | |
| 1374 | return 0; |
| 1375 | } |
Trond Myklebust | 788e7a8 | 2006-03-20 13:44:27 -0500 | [diff] [blame] | 1376 | |
Trond Myklebust | a08a8cd | 2015-02-26 17:36:09 -0500 | [diff] [blame] | 1377 | static void nfs_writeback_check_extend(struct nfs_pgio_header *hdr, |
| 1378 | struct nfs_fattr *fattr) |
| 1379 | { |
| 1380 | struct nfs_pgio_args *argp = &hdr->args; |
| 1381 | struct nfs_pgio_res *resp = &hdr->res; |
Trond Myklebust | 2b83d3d | 2015-07-05 20:06:38 -0400 | [diff] [blame] | 1382 | u64 size = argp->offset + resp->count; |
Trond Myklebust | a08a8cd | 2015-02-26 17:36:09 -0500 | [diff] [blame] | 1383 | |
| 1384 | if (!(fattr->valid & NFS_ATTR_FATTR_SIZE)) |
Trond Myklebust | 2b83d3d | 2015-07-05 20:06:38 -0400 | [diff] [blame] | 1385 | fattr->size = size; |
| 1386 | if (nfs_size_to_loff_t(fattr->size) < i_size_read(hdr->inode)) { |
| 1387 | fattr->valid &= ~NFS_ATTR_FATTR_SIZE; |
Trond Myklebust | a08a8cd | 2015-02-26 17:36:09 -0500 | [diff] [blame] | 1388 | return; |
Trond Myklebust | 2b83d3d | 2015-07-05 20:06:38 -0400 | [diff] [blame] | 1389 | } |
| 1390 | if (size != fattr->size) |
Trond Myklebust | a08a8cd | 2015-02-26 17:36:09 -0500 | [diff] [blame] | 1391 | return; |
| 1392 | /* Set attribute barrier */ |
| 1393 | nfs_fattr_set_barrier(fattr); |
Trond Myklebust | 2b83d3d | 2015-07-05 20:06:38 -0400 | [diff] [blame] | 1394 | /* ...and update size */ |
| 1395 | fattr->valid |= NFS_ATTR_FATTR_SIZE; |
Trond Myklebust | a08a8cd | 2015-02-26 17:36:09 -0500 | [diff] [blame] | 1396 | } |
| 1397 | |
| 1398 | void nfs_writeback_update_inode(struct nfs_pgio_header *hdr) |
| 1399 | { |
Trond Myklebust | 2b83d3d | 2015-07-05 20:06:38 -0400 | [diff] [blame] | 1400 | struct nfs_fattr *fattr = &hdr->fattr; |
Trond Myklebust | a08a8cd | 2015-02-26 17:36:09 -0500 | [diff] [blame] | 1401 | struct inode *inode = hdr->inode; |
| 1402 | |
Trond Myklebust | a08a8cd | 2015-02-26 17:36:09 -0500 | [diff] [blame] | 1403 | spin_lock(&inode->i_lock); |
| 1404 | nfs_writeback_check_extend(hdr, fattr); |
| 1405 | nfs_post_op_update_inode_force_wcc_locked(inode, fattr); |
| 1406 | spin_unlock(&inode->i_lock); |
| 1407 | } |
| 1408 | EXPORT_SYMBOL_GPL(nfs_writeback_update_inode); |
| 1409 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1410 | /* |
| 1411 | * This function is called when the WRITE call is complete. |
| 1412 | */ |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1413 | static int nfs_writeback_done(struct rpc_task *task, |
| 1414 | struct nfs_pgio_header *hdr, |
Anna Schumaker | 0eecb21 | 2014-05-06 09:12:32 -0400 | [diff] [blame] | 1415 | struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1416 | { |
Trond Myklebust | 788e7a8 | 2006-03-20 13:44:27 -0500 | [diff] [blame] | 1417 | int status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1418 | |
Chuck Lever | f551e44 | 2006-09-20 14:33:04 -0400 | [diff] [blame] | 1419 | /* |
| 1420 | * ->write_done will attempt to use post-op attributes to detect |
| 1421 | * conflicting writes by other clients. A strict interpretation |
| 1422 | * of close-to-open would allow us to continue caching even if |
| 1423 | * another writer had changed the file, but some applications |
| 1424 | * depend on tighter cache coherency when writing. |
| 1425 | */ |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1426 | status = NFS_PROTO(inode)->write_done(task, hdr); |
Trond Myklebust | 788e7a8 | 2006-03-20 13:44:27 -0500 | [diff] [blame] | 1427 | if (status != 0) |
Anna Schumaker | 0eecb21 | 2014-05-06 09:12:32 -0400 | [diff] [blame] | 1428 | return status; |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1429 | nfs_add_stats(inode, NFSIOS_SERVERWRITTENBYTES, hdr->res.count); |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 1430 | |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1431 | if (hdr->res.verf->committed < hdr->args.stable && |
| 1432 | task->tk_status >= 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1433 | /* We tried a write call, but the server did not |
| 1434 | * commit data to stable storage even though we |
| 1435 | * requested it. |
| 1436 | * Note: There is a known bug in Tru64 < 5.0 in which |
| 1437 | * the server reports NFS_DATA_SYNC, but performs |
| 1438 | * NFS_FILE_SYNC. We therefore implement this checking |
| 1439 | * as a dprintk() in order to avoid filling syslog. |
| 1440 | */ |
| 1441 | static unsigned long complain; |
| 1442 | |
Fred Isaman | a69aef1 | 2011-03-03 15:13:47 +0000 | [diff] [blame] | 1443 | /* Note this will print the MDS for a DS write */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1444 | if (time_before(complain, jiffies)) { |
Chuck Lever | 48186c7 | 2008-06-11 17:56:05 -0400 | [diff] [blame] | 1445 | dprintk("NFS: faulty NFS server %s:" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1446 | " (committed = %d) != (stable = %d)\n", |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1447 | NFS_SERVER(inode)->nfs_client->cl_hostname, |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1448 | hdr->res.verf->committed, hdr->args.stable); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1449 | complain = jiffies + 300 * HZ; |
| 1450 | } |
| 1451 | } |
Trond Myklebust | 1f2edbe | 2014-04-13 11:11:31 -0400 | [diff] [blame] | 1452 | |
| 1453 | /* Deal with the suid/sgid bit corner case */ |
| 1454 | if (nfs_should_remove_suid(inode)) |
| 1455 | nfs_mark_for_revalidate(inode); |
Anna Schumaker | 0eecb21 | 2014-05-06 09:12:32 -0400 | [diff] [blame] | 1456 | return 0; |
| 1457 | } |
| 1458 | |
| 1459 | /* |
| 1460 | * This function is called when the WRITE call is complete. |
| 1461 | */ |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1462 | static void nfs_writeback_result(struct rpc_task *task, |
| 1463 | struct nfs_pgio_header *hdr) |
Anna Schumaker | 0eecb21 | 2014-05-06 09:12:32 -0400 | [diff] [blame] | 1464 | { |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1465 | struct nfs_pgio_args *argp = &hdr->args; |
| 1466 | struct nfs_pgio_res *resp = &hdr->res; |
Trond Myklebust | 1f2edbe | 2014-04-13 11:11:31 -0400 | [diff] [blame] | 1467 | |
| 1468 | if (resp->count < argp->count) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1469 | static unsigned long complain; |
| 1470 | |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1471 | /* This a short write! */ |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1472 | nfs_inc_stats(hdr->inode, NFSIOS_SHORTWRITE); |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 1473 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1474 | /* Has the server at least made some progress? */ |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1475 | if (resp->count == 0) { |
| 1476 | if (time_before(complain, jiffies)) { |
| 1477 | printk(KERN_WARNING |
| 1478 | "NFS: Server wrote zero bytes, expected %u.\n", |
| 1479 | argp->count); |
| 1480 | complain = jiffies + 300 * HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1481 | } |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1482 | nfs_set_pgio_error(hdr, -EIO, argp->offset); |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1483 | task->tk_status = -EIO; |
Fred Isaman | 1360289 | 2011-02-11 15:42:38 +0000 | [diff] [blame] | 1484 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1485 | } |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1486 | /* Was this an NFSv2 write or an NFSv3 stable write? */ |
| 1487 | if (resp->verf->committed != NFS_UNSTABLE) { |
| 1488 | /* Resend from where the server left off */ |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1489 | hdr->mds_offset += resp->count; |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1490 | argp->offset += resp->count; |
| 1491 | argp->pgbase += resp->count; |
| 1492 | argp->count -= resp->count; |
| 1493 | } else { |
| 1494 | /* Resend as a stable write in order to avoid |
| 1495 | * headaches in the case of a server crash. |
| 1496 | */ |
| 1497 | argp->stable = NFS_FILE_SYNC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1498 | } |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1499 | rpc_restart_call_prepare(task); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1500 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1501 | } |
| 1502 | |
| 1503 | |
Trond Myklebust | 71d0a61 | 2010-04-22 15:35:57 -0400 | [diff] [blame] | 1504 | static int nfs_commit_set_lock(struct nfs_inode *nfsi, int may_wait) |
| 1505 | { |
Trond Myklebust | b8413f9 | 2011-03-21 15:37:01 -0400 | [diff] [blame] | 1506 | int ret; |
| 1507 | |
Trond Myklebust | 71d0a61 | 2010-04-22 15:35:57 -0400 | [diff] [blame] | 1508 | if (!test_and_set_bit(NFS_INO_COMMIT, &nfsi->flags)) |
| 1509 | return 1; |
Trond Myklebust | b8413f9 | 2011-03-21 15:37:01 -0400 | [diff] [blame] | 1510 | if (!may_wait) |
| 1511 | return 0; |
| 1512 | ret = out_of_line_wait_on_bit_lock(&nfsi->flags, |
| 1513 | NFS_INO_COMMIT, |
| 1514 | nfs_wait_bit_killable, |
| 1515 | TASK_KILLABLE); |
| 1516 | return (ret < 0) ? ret : 1; |
Trond Myklebust | 71d0a61 | 2010-04-22 15:35:57 -0400 | [diff] [blame] | 1517 | } |
| 1518 | |
Fred Isaman | f453a54 | 2012-04-20 14:47:54 -0400 | [diff] [blame] | 1519 | static void nfs_commit_clear_lock(struct nfs_inode *nfsi) |
Trond Myklebust | 71d0a61 | 2010-04-22 15:35:57 -0400 | [diff] [blame] | 1520 | { |
| 1521 | clear_bit(NFS_INO_COMMIT, &nfsi->flags); |
Peter Zijlstra | 4e857c5 | 2014-03-17 18:06:10 +0100 | [diff] [blame] | 1522 | smp_mb__after_atomic(); |
Trond Myklebust | 71d0a61 | 2010-04-22 15:35:57 -0400 | [diff] [blame] | 1523 | wake_up_bit(&nfsi->flags, NFS_INO_COMMIT); |
| 1524 | } |
| 1525 | |
Fred Isaman | 0b7c015 | 2012-04-20 14:47:39 -0400 | [diff] [blame] | 1526 | void nfs_commitdata_release(struct nfs_commit_data *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1527 | { |
Fred Isaman | 0b7c015 | 2012-04-20 14:47:39 -0400 | [diff] [blame] | 1528 | put_nfs_open_context(data->context); |
| 1529 | nfs_commit_free(data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1530 | } |
Fred Isaman | e0c2b38 | 2011-03-23 13:27:53 +0000 | [diff] [blame] | 1531 | EXPORT_SYMBOL_GPL(nfs_commitdata_release); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1532 | |
Fred Isaman | 0b7c015 | 2012-04-20 14:47:39 -0400 | [diff] [blame] | 1533 | int nfs_initiate_commit(struct rpc_clnt *clnt, struct nfs_commit_data *data, |
Peng Tao | c36aae9 | 2014-06-09 07:10:14 +0800 | [diff] [blame] | 1534 | const struct nfs_rpc_ops *nfs_ops, |
Fred Isaman | 9ace33c | 2011-03-23 13:27:45 +0000 | [diff] [blame] | 1535 | const struct rpc_call_ops *call_ops, |
Andy Adamson | 9f0ec176 | 2012-04-27 17:53:44 -0400 | [diff] [blame] | 1536 | int how, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1537 | { |
Trond Myklebust | 0773769 | 2007-10-25 18:42:54 -0400 | [diff] [blame] | 1538 | struct rpc_task *task; |
Fred Isaman | 9ace33c | 2011-03-23 13:27:45 +0000 | [diff] [blame] | 1539 | int priority = flush_task_priority(how); |
Trond Myklebust | bdc7f02 | 2007-07-14 15:40:00 -0400 | [diff] [blame] | 1540 | struct rpc_message msg = { |
| 1541 | .rpc_argp = &data->args, |
| 1542 | .rpc_resp = &data->res, |
Fred Isaman | 9ace33c | 2011-03-23 13:27:45 +0000 | [diff] [blame] | 1543 | .rpc_cred = data->cred, |
Trond Myklebust | bdc7f02 | 2007-07-14 15:40:00 -0400 | [diff] [blame] | 1544 | }; |
Trond Myklebust | 84115e1 | 2007-07-14 15:39:59 -0400 | [diff] [blame] | 1545 | struct rpc_task_setup task_setup_data = { |
Trond Myklebust | 0773769 | 2007-10-25 18:42:54 -0400 | [diff] [blame] | 1546 | .task = &data->task, |
Fred Isaman | 9ace33c | 2011-03-23 13:27:45 +0000 | [diff] [blame] | 1547 | .rpc_client = clnt, |
Trond Myklebust | bdc7f02 | 2007-07-14 15:40:00 -0400 | [diff] [blame] | 1548 | .rpc_message = &msg, |
Fred Isaman | 9ace33c | 2011-03-23 13:27:45 +0000 | [diff] [blame] | 1549 | .callback_ops = call_ops, |
Trond Myklebust | 84115e1 | 2007-07-14 15:39:59 -0400 | [diff] [blame] | 1550 | .callback_data = data, |
Trond Myklebust | 101070c | 2008-02-19 20:04:23 -0500 | [diff] [blame] | 1551 | .workqueue = nfsiod_workqueue, |
Andy Adamson | 9f0ec176 | 2012-04-27 17:53:44 -0400 | [diff] [blame] | 1552 | .flags = RPC_TASK_ASYNC | flags, |
Trond Myklebust | 3ff7576 | 2007-07-14 15:40:00 -0400 | [diff] [blame] | 1553 | .priority = priority, |
Trond Myklebust | 84115e1 | 2007-07-14 15:39:59 -0400 | [diff] [blame] | 1554 | }; |
Trond Myklebust | 788e7a8 | 2006-03-20 13:44:27 -0500 | [diff] [blame] | 1555 | /* Set up the initial task struct. */ |
Peng Tao | c36aae9 | 2014-06-09 07:10:14 +0800 | [diff] [blame] | 1556 | nfs_ops->commit_setup(data, &msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1557 | |
Kinglong Mee | b4839eb | 2015-07-01 12:00:13 +0800 | [diff] [blame] | 1558 | dprintk("NFS: initiated commit call\n"); |
Trond Myklebust | bdc7f02 | 2007-07-14 15:40:00 -0400 | [diff] [blame] | 1559 | |
Weston Andros Adamson | 8c21c62 | 2013-08-13 16:37:37 -0400 | [diff] [blame] | 1560 | nfs4_state_protect(NFS_SERVER(data->inode)->nfs_client, |
| 1561 | NFS_SP4_MACH_CRED_COMMIT, &task_setup_data.rpc_client, &msg); |
| 1562 | |
Trond Myklebust | 0773769 | 2007-10-25 18:42:54 -0400 | [diff] [blame] | 1563 | task = rpc_run_task(&task_setup_data); |
Trond Myklebust | dbae4c7 | 2008-04-14 14:54:53 -0400 | [diff] [blame] | 1564 | if (IS_ERR(task)) |
| 1565 | return PTR_ERR(task); |
Jeff Layton | d2224e7 | 2011-03-06 17:14:13 +0000 | [diff] [blame] | 1566 | if (how & FLUSH_SYNC) |
| 1567 | rpc_wait_for_completion_task(task); |
Trond Myklebust | dbae4c7 | 2008-04-14 14:54:53 -0400 | [diff] [blame] | 1568 | rpc_put_task(task); |
| 1569 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1570 | } |
Fred Isaman | e0c2b38 | 2011-03-23 13:27:53 +0000 | [diff] [blame] | 1571 | EXPORT_SYMBOL_GPL(nfs_initiate_commit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1572 | |
Peng Tao | 378520b | 2014-08-07 10:15:02 +0800 | [diff] [blame] | 1573 | static loff_t nfs_get_lwb(struct list_head *head) |
| 1574 | { |
| 1575 | loff_t lwb = 0; |
| 1576 | struct nfs_page *req; |
| 1577 | |
| 1578 | list_for_each_entry(req, head, wb_list) |
| 1579 | if (lwb < (req_offset(req) + req->wb_bytes)) |
| 1580 | lwb = req_offset(req) + req->wb_bytes; |
| 1581 | |
| 1582 | return lwb; |
| 1583 | } |
| 1584 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1585 | /* |
Fred Isaman | 9ace33c | 2011-03-23 13:27:45 +0000 | [diff] [blame] | 1586 | * Set up the argument/result storage required for the RPC call. |
| 1587 | */ |
Fred Isaman | 0b7c015 | 2012-04-20 14:47:39 -0400 | [diff] [blame] | 1588 | void nfs_init_commit(struct nfs_commit_data *data, |
Fred Isaman | f453a54 | 2012-04-20 14:47:54 -0400 | [diff] [blame] | 1589 | struct list_head *head, |
| 1590 | struct pnfs_layout_segment *lseg, |
| 1591 | struct nfs_commit_info *cinfo) |
Fred Isaman | 9ace33c | 2011-03-23 13:27:45 +0000 | [diff] [blame] | 1592 | { |
| 1593 | struct nfs_page *first = nfs_list_entry(head->next); |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 1594 | struct inode *inode = d_inode(first->wb_context->dentry); |
Fred Isaman | 9ace33c | 2011-03-23 13:27:45 +0000 | [diff] [blame] | 1595 | |
| 1596 | /* Set up the RPC argument and reply structs |
| 1597 | * NB: take care not to mess about with data->commit et al. */ |
| 1598 | |
| 1599 | list_splice_init(head, &data->pages); |
| 1600 | |
| 1601 | data->inode = inode; |
| 1602 | data->cred = first->wb_context->cred; |
Fred Isaman | 988b6dc | 2011-03-23 13:27:52 +0000 | [diff] [blame] | 1603 | data->lseg = lseg; /* reference transferred */ |
Peng Tao | 378520b | 2014-08-07 10:15:02 +0800 | [diff] [blame] | 1604 | /* only set lwb for pnfs commit */ |
| 1605 | if (lseg) |
| 1606 | data->lwb = nfs_get_lwb(&data->pages); |
Fred Isaman | 9ace33c | 2011-03-23 13:27:45 +0000 | [diff] [blame] | 1607 | data->mds_ops = &nfs_commit_ops; |
Fred Isaman | f453a54 | 2012-04-20 14:47:54 -0400 | [diff] [blame] | 1608 | data->completion_ops = cinfo->completion_ops; |
Fred Isaman | b359f9d | 2012-04-20 14:47:55 -0400 | [diff] [blame] | 1609 | data->dreq = cinfo->dreq; |
Fred Isaman | 9ace33c | 2011-03-23 13:27:45 +0000 | [diff] [blame] | 1610 | |
| 1611 | data->args.fh = NFS_FH(data->inode); |
| 1612 | /* Note: we always request a commit of the entire inode */ |
| 1613 | data->args.offset = 0; |
| 1614 | data->args.count = 0; |
Fred Isaman | 0b7c015 | 2012-04-20 14:47:39 -0400 | [diff] [blame] | 1615 | data->context = get_nfs_open_context(first->wb_context); |
Fred Isaman | 9ace33c | 2011-03-23 13:27:45 +0000 | [diff] [blame] | 1616 | data->res.fattr = &data->fattr; |
| 1617 | data->res.verf = &data->verf; |
| 1618 | nfs_fattr_init(&data->fattr); |
| 1619 | } |
Fred Isaman | e0c2b38 | 2011-03-23 13:27:53 +0000 | [diff] [blame] | 1620 | EXPORT_SYMBOL_GPL(nfs_init_commit); |
Fred Isaman | 9ace33c | 2011-03-23 13:27:45 +0000 | [diff] [blame] | 1621 | |
Fred Isaman | e0c2b38 | 2011-03-23 13:27:53 +0000 | [diff] [blame] | 1622 | void nfs_retry_commit(struct list_head *page_list, |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 1623 | struct pnfs_layout_segment *lseg, |
Weston Andros Adamson | b57ff13 | 2014-09-05 18:20:21 -0400 | [diff] [blame] | 1624 | struct nfs_commit_info *cinfo, |
| 1625 | u32 ds_commit_idx) |
Fred Isaman | 64bfeb4 | 2011-03-23 13:27:47 +0000 | [diff] [blame] | 1626 | { |
| 1627 | struct nfs_page *req; |
| 1628 | |
| 1629 | while (!list_empty(page_list)) { |
| 1630 | req = nfs_list_entry(page_list->next); |
| 1631 | nfs_list_remove_request(req); |
Weston Andros Adamson | b57ff13 | 2014-09-05 18:20:21 -0400 | [diff] [blame] | 1632 | nfs_mark_request_commit(req, lseg, cinfo, ds_commit_idx); |
Tom Haynes | 487b9b8 | 2015-02-13 13:19:54 -0800 | [diff] [blame] | 1633 | if (!cinfo->dreq) |
| 1634 | nfs_clear_page_commit(req->wb_page); |
Trond Myklebust | 1d1afcb | 2012-05-09 14:04:55 -0400 | [diff] [blame] | 1635 | nfs_unlock_and_release_request(req); |
Fred Isaman | 64bfeb4 | 2011-03-23 13:27:47 +0000 | [diff] [blame] | 1636 | } |
| 1637 | } |
Fred Isaman | e0c2b38 | 2011-03-23 13:27:53 +0000 | [diff] [blame] | 1638 | EXPORT_SYMBOL_GPL(nfs_retry_commit); |
Fred Isaman | 64bfeb4 | 2011-03-23 13:27:47 +0000 | [diff] [blame] | 1639 | |
Fred Isaman | 9ace33c | 2011-03-23 13:27:45 +0000 | [diff] [blame] | 1640 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1641 | * Commit dirty pages |
| 1642 | */ |
| 1643 | static int |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 1644 | nfs_commit_list(struct inode *inode, struct list_head *head, int how, |
| 1645 | struct nfs_commit_info *cinfo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1646 | { |
Fred Isaman | 0b7c015 | 2012-04-20 14:47:39 -0400 | [diff] [blame] | 1647 | struct nfs_commit_data *data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1648 | |
Trond Myklebust | c9d8f89 | 2008-04-15 16:56:39 -0400 | [diff] [blame] | 1649 | data = nfs_commitdata_alloc(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1650 | |
| 1651 | if (!data) |
| 1652 | goto out_bad; |
| 1653 | |
| 1654 | /* Set up the argument struct */ |
Fred Isaman | f453a54 | 2012-04-20 14:47:54 -0400 | [diff] [blame] | 1655 | nfs_init_commit(data, head, NULL, cinfo); |
| 1656 | atomic_inc(&cinfo->mds->rpcs_out); |
Peng Tao | c36aae9 | 2014-06-09 07:10:14 +0800 | [diff] [blame] | 1657 | return nfs_initiate_commit(NFS_CLIENT(inode), data, NFS_PROTO(inode), |
| 1658 | data->mds_ops, how, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1659 | out_bad: |
Weston Andros Adamson | b57ff13 | 2014-09-05 18:20:21 -0400 | [diff] [blame] | 1660 | nfs_retry_commit(head, NULL, cinfo, 0); |
Fred Isaman | f453a54 | 2012-04-20 14:47:54 -0400 | [diff] [blame] | 1661 | cinfo->completion_ops->error_cleanup(NFS_I(inode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1662 | return -ENOMEM; |
| 1663 | } |
| 1664 | |
| 1665 | /* |
| 1666 | * COMMIT call returned |
| 1667 | */ |
Trond Myklebust | 788e7a8 | 2006-03-20 13:44:27 -0500 | [diff] [blame] | 1668 | static void nfs_commit_done(struct rpc_task *task, void *calldata) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1669 | { |
Fred Isaman | 0b7c015 | 2012-04-20 14:47:39 -0400 | [diff] [blame] | 1670 | struct nfs_commit_data *data = calldata; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1671 | |
Chuck Lever | a3f565b | 2007-01-31 12:14:01 -0500 | [diff] [blame] | 1672 | dprintk("NFS: %5u nfs_commit_done (status %d)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1673 | task->tk_pid, task->tk_status); |
| 1674 | |
Trond Myklebust | 788e7a8 | 2006-03-20 13:44:27 -0500 | [diff] [blame] | 1675 | /* Call the NFS version-specific code */ |
Trond Myklebust | c0d0e96 | 2011-04-12 12:29:15 -0400 | [diff] [blame] | 1676 | NFS_PROTO(data->inode)->commit_done(task, data); |
Trond Myklebust | c9d8f89 | 2008-04-15 16:56:39 -0400 | [diff] [blame] | 1677 | } |
| 1678 | |
Fred Isaman | f453a54 | 2012-04-20 14:47:54 -0400 | [diff] [blame] | 1679 | static void nfs_commit_release_pages(struct nfs_commit_data *data) |
Trond Myklebust | c9d8f89 | 2008-04-15 16:56:39 -0400 | [diff] [blame] | 1680 | { |
Fred Isaman | 5917ce8 | 2011-03-23 13:27:48 +0000 | [diff] [blame] | 1681 | struct nfs_page *req; |
Trond Myklebust | c9d8f89 | 2008-04-15 16:56:39 -0400 | [diff] [blame] | 1682 | int status = data->task.tk_status; |
Fred Isaman | f453a54 | 2012-04-20 14:47:54 -0400 | [diff] [blame] | 1683 | struct nfs_commit_info cinfo; |
NeilBrown | 353db79 | 2014-09-24 11:28:32 +1000 | [diff] [blame] | 1684 | struct nfs_server *nfss; |
Trond Myklebust | 788e7a8 | 2006-03-20 13:44:27 -0500 | [diff] [blame] | 1685 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1686 | while (!list_empty(&data->pages)) { |
| 1687 | req = nfs_list_entry(data->pages.next); |
| 1688 | nfs_list_remove_request(req); |
Fred Isaman | d6d6dc7 | 2012-03-08 17:29:35 -0500 | [diff] [blame] | 1689 | nfs_clear_page_commit(req->wb_page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1690 | |
Niels de Vos | 1e8968c | 2013-12-17 18:20:16 +0100 | [diff] [blame] | 1691 | dprintk("NFS: commit (%s/%llu %d@%lld)", |
Al Viro | 3d4ff43 | 2011-06-22 18:40:12 -0400 | [diff] [blame] | 1692 | req->wb_context->dentry->d_sb->s_id, |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 1693 | (unsigned long long)NFS_FILEID(d_inode(req->wb_context->dentry)), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1694 | req->wb_bytes, |
| 1695 | (long long)req_offset(req)); |
Trond Myklebust | c9d8f89 | 2008-04-15 16:56:39 -0400 | [diff] [blame] | 1696 | if (status < 0) { |
| 1697 | nfs_context_set_write_error(req->wb_context, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1698 | nfs_inode_remove_request(req); |
Trond Myklebust | c9d8f89 | 2008-04-15 16:56:39 -0400 | [diff] [blame] | 1699 | dprintk(", error = %d\n", status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1700 | goto next; |
| 1701 | } |
| 1702 | |
| 1703 | /* Okay, COMMIT succeeded, apparently. Check the verifier |
| 1704 | * returned by the server against all stored verfs. */ |
Trond Myklebust | 2f2c63b | 2012-06-08 11:56:09 -0400 | [diff] [blame] | 1705 | if (!memcmp(&req->wb_verf, &data->verf.verifier, sizeof(req->wb_verf))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1706 | /* We have a match */ |
| 1707 | nfs_inode_remove_request(req); |
| 1708 | dprintk(" OK\n"); |
| 1709 | goto next; |
| 1710 | } |
| 1711 | /* We have a mismatch. Write the page again */ |
| 1712 | dprintk(" mismatch\n"); |
Fred | 6d884e8 | 2008-03-19 11:24:38 -0400 | [diff] [blame] | 1713 | nfs_mark_request_dirty(req); |
Trond Myklebust | 05990d1 | 2012-09-11 16:01:22 -0400 | [diff] [blame] | 1714 | set_bit(NFS_CONTEXT_RESEND_WRITES, &req->wb_context->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1715 | next: |
Trond Myklebust | 1d1afcb | 2012-05-09 14:04:55 -0400 | [diff] [blame] | 1716 | nfs_unlock_and_release_request(req); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1717 | } |
NeilBrown | 353db79 | 2014-09-24 11:28:32 +1000 | [diff] [blame] | 1718 | nfss = NFS_SERVER(data->inode); |
| 1719 | if (atomic_long_read(&nfss->writeback) < NFS_CONGESTION_OFF_THRESH) |
| 1720 | clear_bdi_congested(&nfss->backing_dev_info, BLK_RW_ASYNC); |
| 1721 | |
Fred Isaman | f453a54 | 2012-04-20 14:47:54 -0400 | [diff] [blame] | 1722 | nfs_init_cinfo(&cinfo, data->inode, data->dreq); |
| 1723 | if (atomic_dec_and_test(&cinfo.mds->rpcs_out)) |
| 1724 | nfs_commit_clear_lock(NFS_I(data->inode)); |
Fred Isaman | 5917ce8 | 2011-03-23 13:27:48 +0000 | [diff] [blame] | 1725 | } |
| 1726 | |
| 1727 | static void nfs_commit_release(void *calldata) |
| 1728 | { |
Fred Isaman | 0b7c015 | 2012-04-20 14:47:39 -0400 | [diff] [blame] | 1729 | struct nfs_commit_data *data = calldata; |
Fred Isaman | 5917ce8 | 2011-03-23 13:27:48 +0000 | [diff] [blame] | 1730 | |
Fred Isaman | f453a54 | 2012-04-20 14:47:54 -0400 | [diff] [blame] | 1731 | data->completion_ops->completion(data); |
Trond Myklebust | c9d8f89 | 2008-04-15 16:56:39 -0400 | [diff] [blame] | 1732 | nfs_commitdata_release(calldata); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1733 | } |
Trond Myklebust | 788e7a8 | 2006-03-20 13:44:27 -0500 | [diff] [blame] | 1734 | |
| 1735 | static const struct rpc_call_ops nfs_commit_ops = { |
Fred Isaman | 0b7c015 | 2012-04-20 14:47:39 -0400 | [diff] [blame] | 1736 | .rpc_call_prepare = nfs_commit_prepare, |
Trond Myklebust | 788e7a8 | 2006-03-20 13:44:27 -0500 | [diff] [blame] | 1737 | .rpc_call_done = nfs_commit_done, |
| 1738 | .rpc_release = nfs_commit_release, |
| 1739 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1740 | |
Fred Isaman | f453a54 | 2012-04-20 14:47:54 -0400 | [diff] [blame] | 1741 | static const struct nfs_commit_completion_ops nfs_commit_completion_ops = { |
| 1742 | .completion = nfs_commit_release_pages, |
| 1743 | .error_cleanup = nfs_commit_clear_lock, |
| 1744 | }; |
| 1745 | |
Fred Isaman | 1763da1 | 2012-04-20 14:47:57 -0400 | [diff] [blame] | 1746 | int nfs_generic_commit_list(struct inode *inode, struct list_head *head, |
| 1747 | int how, struct nfs_commit_info *cinfo) |
Fred Isaman | 84c53ab | 2012-04-20 14:47:52 -0400 | [diff] [blame] | 1748 | { |
| 1749 | int status; |
| 1750 | |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 1751 | status = pnfs_commit_list(inode, head, how, cinfo); |
Fred Isaman | 84c53ab | 2012-04-20 14:47:52 -0400 | [diff] [blame] | 1752 | if (status == PNFS_NOT_ATTEMPTED) |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 1753 | status = nfs_commit_list(inode, head, how, cinfo); |
Fred Isaman | 84c53ab | 2012-04-20 14:47:52 -0400 | [diff] [blame] | 1754 | return status; |
| 1755 | } |
| 1756 | |
Trond Myklebust | b608b28 | 2010-07-30 15:31:54 -0400 | [diff] [blame] | 1757 | int nfs_commit_inode(struct inode *inode, int how) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1758 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1759 | LIST_HEAD(head); |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 1760 | struct nfs_commit_info cinfo; |
Trond Myklebust | 71d0a61 | 2010-04-22 15:35:57 -0400 | [diff] [blame] | 1761 | int may_wait = how & FLUSH_SYNC; |
Trond Myklebust | b8413f9 | 2011-03-21 15:37:01 -0400 | [diff] [blame] | 1762 | int res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1763 | |
Trond Myklebust | b8413f9 | 2011-03-21 15:37:01 -0400 | [diff] [blame] | 1764 | res = nfs_commit_set_lock(NFS_I(inode), may_wait); |
| 1765 | if (res <= 0) |
Trond Myklebust | c5efa5f | 2010-05-26 08:42:11 -0400 | [diff] [blame] | 1766 | goto out_mark_dirty; |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 1767 | nfs_init_cinfo_from_inode(&cinfo, inode); |
| 1768 | res = nfs_scan_commit(inode, &head, &cinfo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1769 | if (res) { |
Fred Isaman | a861a1e | 2011-03-23 13:27:51 +0000 | [diff] [blame] | 1770 | int error; |
| 1771 | |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 1772 | error = nfs_generic_commit_list(inode, &head, how, &cinfo); |
Trond Myklebust | 3da28eb | 2005-06-22 17:16:31 +0000 | [diff] [blame] | 1773 | if (error < 0) |
| 1774 | return error; |
Trond Myklebust | b8413f9 | 2011-03-21 15:37:01 -0400 | [diff] [blame] | 1775 | if (!may_wait) |
Trond Myklebust | c5efa5f | 2010-05-26 08:42:11 -0400 | [diff] [blame] | 1776 | goto out_mark_dirty; |
NeilBrown | 7431620 | 2014-07-07 15:16:04 +1000 | [diff] [blame] | 1777 | error = wait_on_bit_action(&NFS_I(inode)->flags, |
Trond Myklebust | b8413f9 | 2011-03-21 15:37:01 -0400 | [diff] [blame] | 1778 | NFS_INO_COMMIT, |
| 1779 | nfs_wait_bit_killable, |
| 1780 | TASK_KILLABLE); |
| 1781 | if (error < 0) |
| 1782 | return error; |
Trond Myklebust | 71d0a61 | 2010-04-22 15:35:57 -0400 | [diff] [blame] | 1783 | } else |
| 1784 | nfs_commit_clear_lock(NFS_I(inode)); |
Trond Myklebust | c5efa5f | 2010-05-26 08:42:11 -0400 | [diff] [blame] | 1785 | return res; |
| 1786 | /* Note: If we exit without ensuring that the commit is complete, |
| 1787 | * we must mark the inode as dirty. Otherwise, future calls to |
| 1788 | * sync_inode() with the WB_SYNC_ALL flag set will fail to ensure |
| 1789 | * that the data is on the disk. |
| 1790 | */ |
| 1791 | out_mark_dirty: |
| 1792 | __mark_inode_dirty(inode, I_DIRTY_DATASYNC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1793 | return res; |
| 1794 | } |
Trond Myklebust | 8fc795f | 2010-02-19 16:46:56 -0800 | [diff] [blame] | 1795 | |
| 1796 | static int nfs_commit_unstable_pages(struct inode *inode, struct writeback_control *wbc) |
| 1797 | { |
Trond Myklebust | 420e364 | 2010-02-19 17:00:02 -0800 | [diff] [blame] | 1798 | struct nfs_inode *nfsi = NFS_I(inode); |
| 1799 | int flags = FLUSH_SYNC; |
| 1800 | int ret = 0; |
Trond Myklebust | 8fc795f | 2010-02-19 16:46:56 -0800 | [diff] [blame] | 1801 | |
Jeff Layton | 3236c3e | 2011-10-11 09:49:21 -0400 | [diff] [blame] | 1802 | /* no commits means nothing needs to be done */ |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 1803 | if (!nfsi->commit_info.ncommit) |
Jeff Layton | 3236c3e | 2011-10-11 09:49:21 -0400 | [diff] [blame] | 1804 | return ret; |
| 1805 | |
Jeff Layton | a00dd6c | 2010-09-28 09:14:01 -0400 | [diff] [blame] | 1806 | if (wbc->sync_mode == WB_SYNC_NONE) { |
| 1807 | /* Don't commit yet if this is a non-blocking flush and there |
| 1808 | * are a lot of outstanding writes for this mapping. |
| 1809 | */ |
Weston Andros Adamson | cb1410c | 2014-11-12 12:08:00 -0500 | [diff] [blame] | 1810 | if (nfsi->commit_info.ncommit <= (nfsi->nrequests >> 1)) |
Jeff Layton | a00dd6c | 2010-09-28 09:14:01 -0400 | [diff] [blame] | 1811 | goto out_mark_dirty; |
Trond Myklebust | 420e364 | 2010-02-19 17:00:02 -0800 | [diff] [blame] | 1812 | |
Jeff Layton | a00dd6c | 2010-09-28 09:14:01 -0400 | [diff] [blame] | 1813 | /* don't wait for the COMMIT response */ |
Trond Myklebust | 420e364 | 2010-02-19 17:00:02 -0800 | [diff] [blame] | 1814 | flags = 0; |
Jeff Layton | a00dd6c | 2010-09-28 09:14:01 -0400 | [diff] [blame] | 1815 | } |
| 1816 | |
Trond Myklebust | 420e364 | 2010-02-19 17:00:02 -0800 | [diff] [blame] | 1817 | ret = nfs_commit_inode(inode, flags); |
| 1818 | if (ret >= 0) { |
| 1819 | if (wbc->sync_mode == WB_SYNC_NONE) { |
| 1820 | if (ret < wbc->nr_to_write) |
| 1821 | wbc->nr_to_write -= ret; |
| 1822 | else |
| 1823 | wbc->nr_to_write = 0; |
| 1824 | } |
Trond Myklebust | 8fc795f | 2010-02-19 16:46:56 -0800 | [diff] [blame] | 1825 | return 0; |
Trond Myklebust | 420e364 | 2010-02-19 17:00:02 -0800 | [diff] [blame] | 1826 | } |
| 1827 | out_mark_dirty: |
Trond Myklebust | 8fc795f | 2010-02-19 16:46:56 -0800 | [diff] [blame] | 1828 | __mark_inode_dirty(inode, I_DIRTY_DATASYNC); |
| 1829 | return ret; |
| 1830 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1831 | |
Trond Myklebust | 8fc795f | 2010-02-19 16:46:56 -0800 | [diff] [blame] | 1832 | int nfs_write_inode(struct inode *inode, struct writeback_control *wbc) |
| 1833 | { |
Bryan Schumaker | a8d8f02 | 2012-06-20 15:53:49 -0400 | [diff] [blame] | 1834 | return nfs_commit_unstable_pages(inode, wbc); |
| 1835 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1836 | EXPORT_SYMBOL_GPL(nfs_write_inode); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1837 | |
Trond Myklebust | acdc53b | 2010-02-19 17:03:26 -0800 | [diff] [blame] | 1838 | /* |
| 1839 | * flush the inode to disk. |
| 1840 | */ |
| 1841 | int nfs_wb_all(struct inode *inode) |
Trond Myklebust | 34901f7 | 2007-07-25 14:09:54 -0400 | [diff] [blame] | 1842 | { |
Trond Myklebust | f4ce129 | 2013-08-19 18:59:33 -0400 | [diff] [blame] | 1843 | int ret; |
Trond Myklebust | 34901f7 | 2007-07-25 14:09:54 -0400 | [diff] [blame] | 1844 | |
Trond Myklebust | f4ce129 | 2013-08-19 18:59:33 -0400 | [diff] [blame] | 1845 | trace_nfs_writeback_inode_enter(inode); |
| 1846 | |
Trond Myklebust | 5bb89b4 | 2015-03-25 14:14:42 -0400 | [diff] [blame] | 1847 | ret = filemap_write_and_wait(inode->i_mapping); |
Chuck Lever | 6b19687 | 2015-05-06 18:26:58 -0400 | [diff] [blame] | 1848 | if (ret) |
| 1849 | goto out; |
| 1850 | ret = nfs_commit_inode(inode, FLUSH_SYNC); |
| 1851 | if (ret < 0) |
| 1852 | goto out; |
| 1853 | pnfs_sync_inode(inode, true); |
| 1854 | ret = 0; |
Trond Myklebust | f4ce129 | 2013-08-19 18:59:33 -0400 | [diff] [blame] | 1855 | |
Chuck Lever | 6b19687 | 2015-05-06 18:26:58 -0400 | [diff] [blame] | 1856 | out: |
Trond Myklebust | f4ce129 | 2013-08-19 18:59:33 -0400 | [diff] [blame] | 1857 | trace_nfs_writeback_inode_exit(inode, ret); |
| 1858 | return ret; |
Trond Myklebust | 1c75950 | 2006-10-09 16:18:38 -0400 | [diff] [blame] | 1859 | } |
Bryan Schumaker | ddda8e0 | 2012-07-30 16:05:23 -0400 | [diff] [blame] | 1860 | EXPORT_SYMBOL_GPL(nfs_wb_all); |
Trond Myklebust | 1c75950 | 2006-10-09 16:18:38 -0400 | [diff] [blame] | 1861 | |
Trond Myklebust | 1b3b4a1 | 2007-08-28 10:29:36 -0400 | [diff] [blame] | 1862 | int nfs_wb_page_cancel(struct inode *inode, struct page *page) |
| 1863 | { |
| 1864 | struct nfs_page *req; |
Trond Myklebust | 1b3b4a1 | 2007-08-28 10:29:36 -0400 | [diff] [blame] | 1865 | int ret = 0; |
| 1866 | |
Weston Andros Adamson | 3e21704 | 2014-07-11 10:20:49 -0400 | [diff] [blame] | 1867 | wait_on_page_writeback(page); |
| 1868 | |
| 1869 | /* blocking call to cancel all requests and join to a single (head) |
| 1870 | * request */ |
| 1871 | req = nfs_lock_and_join_requests(page, false); |
| 1872 | |
| 1873 | if (IS_ERR(req)) { |
| 1874 | ret = PTR_ERR(req); |
| 1875 | } else if (req) { |
| 1876 | /* all requests from this page have been cancelled by |
| 1877 | * nfs_lock_and_join_requests, so just remove the head |
| 1878 | * request from the inode / page_private pointer and |
| 1879 | * release it */ |
| 1880 | nfs_inode_remove_request(req); |
Weston Andros Adamson | 3e21704 | 2014-07-11 10:20:49 -0400 | [diff] [blame] | 1881 | nfs_unlock_and_release_request(req); |
Trond Myklebust | 1b3b4a1 | 2007-08-28 10:29:36 -0400 | [diff] [blame] | 1882 | } |
Weston Andros Adamson | 3e21704 | 2014-07-11 10:20:49 -0400 | [diff] [blame] | 1883 | |
Trond Myklebust | 1b3b4a1 | 2007-08-28 10:29:36 -0400 | [diff] [blame] | 1884 | return ret; |
| 1885 | } |
| 1886 | |
Trond Myklebust | 7f2f12d | 2010-02-19 17:03:28 -0800 | [diff] [blame] | 1887 | /* |
| 1888 | * Write back all requests on one page - we do this before reading it. |
| 1889 | */ |
| 1890 | int nfs_wb_page(struct inode *inode, struct page *page) |
Trond Myklebust | 1c75950 | 2006-10-09 16:18:38 -0400 | [diff] [blame] | 1891 | { |
Mel Gorman | 29418aa | 2012-07-31 16:45:10 -0700 | [diff] [blame] | 1892 | loff_t range_start = page_file_offset(page); |
Trond Myklebust | 1c75950 | 2006-10-09 16:18:38 -0400 | [diff] [blame] | 1893 | loff_t range_end = range_start + (loff_t)(PAGE_CACHE_SIZE - 1); |
Trond Myklebust | 4d770cc | 2006-12-05 00:35:41 -0500 | [diff] [blame] | 1894 | struct writeback_control wbc = { |
Trond Myklebust | 4d770cc | 2006-12-05 00:35:41 -0500 | [diff] [blame] | 1895 | .sync_mode = WB_SYNC_ALL, |
Trond Myklebust | 7f2f12d | 2010-02-19 17:03:28 -0800 | [diff] [blame] | 1896 | .nr_to_write = 0, |
Trond Myklebust | 4d770cc | 2006-12-05 00:35:41 -0500 | [diff] [blame] | 1897 | .range_start = range_start, |
| 1898 | .range_end = range_end, |
| 1899 | }; |
| 1900 | int ret; |
Trond Myklebust | 1c75950 | 2006-10-09 16:18:38 -0400 | [diff] [blame] | 1901 | |
Trond Myklebust | f4ce129 | 2013-08-19 18:59:33 -0400 | [diff] [blame] | 1902 | trace_nfs_writeback_page_enter(inode); |
| 1903 | |
Trond Myklebust | 0522f6a | 2010-05-26 08:42:24 -0400 | [diff] [blame] | 1904 | for (;;) { |
Trond Myklebust | ba8b06e | 2010-04-27 18:33:54 -0400 | [diff] [blame] | 1905 | wait_on_page_writeback(page); |
Trond Myklebust | 73e3302 | 2008-04-11 16:03:54 -0400 | [diff] [blame] | 1906 | if (clear_page_dirty_for_io(page)) { |
| 1907 | ret = nfs_writepage_locked(page, &wbc); |
| 1908 | if (ret < 0) |
| 1909 | goto out_error; |
Trond Myklebust | 0522f6a | 2010-05-26 08:42:24 -0400 | [diff] [blame] | 1910 | continue; |
Trond Myklebust | 7f2f12d | 2010-02-19 17:03:28 -0800 | [diff] [blame] | 1911 | } |
Trond Myklebust | f4ce129 | 2013-08-19 18:59:33 -0400 | [diff] [blame] | 1912 | ret = 0; |
Trond Myklebust | 0522f6a | 2010-05-26 08:42:24 -0400 | [diff] [blame] | 1913 | if (!PagePrivate(page)) |
| 1914 | break; |
| 1915 | ret = nfs_commit_inode(inode, FLUSH_SYNC); |
Trond Myklebust | ba8b06e | 2010-04-27 18:33:54 -0400 | [diff] [blame] | 1916 | if (ret < 0) |
Trond Myklebust | 73e3302 | 2008-04-11 16:03:54 -0400 | [diff] [blame] | 1917 | goto out_error; |
Trond Myklebust | 7f2f12d | 2010-02-19 17:03:28 -0800 | [diff] [blame] | 1918 | } |
Trond Myklebust | 73e3302 | 2008-04-11 16:03:54 -0400 | [diff] [blame] | 1919 | out_error: |
Trond Myklebust | f4ce129 | 2013-08-19 18:59:33 -0400 | [diff] [blame] | 1920 | trace_nfs_writeback_page_exit(inode, ret); |
Trond Myklebust | 4d770cc | 2006-12-05 00:35:41 -0500 | [diff] [blame] | 1921 | return ret; |
Trond Myklebust | 1c75950 | 2006-10-09 16:18:38 -0400 | [diff] [blame] | 1922 | } |
| 1923 | |
Trond Myklebust | 074cc1d | 2009-08-10 08:54:13 -0400 | [diff] [blame] | 1924 | #ifdef CONFIG_MIGRATION |
| 1925 | int nfs_migrate_page(struct address_space *mapping, struct page *newpage, |
Mel Gorman | a6bc32b | 2012-01-12 17:19:43 -0800 | [diff] [blame] | 1926 | struct page *page, enum migrate_mode mode) |
Trond Myklebust | 074cc1d | 2009-08-10 08:54:13 -0400 | [diff] [blame] | 1927 | { |
Jeff Layton | 2da9565 | 2011-10-12 10:57:42 -0400 | [diff] [blame] | 1928 | /* |
| 1929 | * If PagePrivate is set, then the page is currently associated with |
| 1930 | * an in-progress read or write request. Don't try to migrate it. |
| 1931 | * |
| 1932 | * FIXME: we could do this in principle, but we'll need a way to ensure |
| 1933 | * that we can safely release the inode reference while holding |
| 1934 | * the page lock. |
| 1935 | */ |
| 1936 | if (PagePrivate(page)) |
| 1937 | return -EBUSY; |
Trond Myklebust | 074cc1d | 2009-08-10 08:54:13 -0400 | [diff] [blame] | 1938 | |
David Howells | 8c209ce | 2012-12-05 13:34:49 +0000 | [diff] [blame] | 1939 | if (!nfs_fscache_release_page(page, GFP_KERNEL)) |
| 1940 | return -EBUSY; |
Trond Myklebust | 074cc1d | 2009-08-10 08:54:13 -0400 | [diff] [blame] | 1941 | |
Mel Gorman | a6bc32b | 2012-01-12 17:19:43 -0800 | [diff] [blame] | 1942 | return migrate_page(mapping, newpage, page, mode); |
Trond Myklebust | 074cc1d | 2009-08-10 08:54:13 -0400 | [diff] [blame] | 1943 | } |
| 1944 | #endif |
| 1945 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1946 | int __init nfs_init_writepagecache(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1947 | { |
| 1948 | nfs_wdata_cachep = kmem_cache_create("nfs_write_data", |
Weston Andros Adamson | 1e7f3a4 | 2014-06-09 11:48:33 -0400 | [diff] [blame] | 1949 | sizeof(struct nfs_pgio_header), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1950 | 0, SLAB_HWCACHE_ALIGN, |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1951 | NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1952 | if (nfs_wdata_cachep == NULL) |
| 1953 | return -ENOMEM; |
| 1954 | |
Matthew Dobson | 93d2341 | 2006-03-26 01:37:50 -0800 | [diff] [blame] | 1955 | nfs_wdata_mempool = mempool_create_slab_pool(MIN_POOL_WRITE, |
| 1956 | nfs_wdata_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1957 | if (nfs_wdata_mempool == NULL) |
Jeff Layton | 3dd4765 | 2012-08-02 14:30:56 -0400 | [diff] [blame] | 1958 | goto out_destroy_write_cache; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1959 | |
Fred Isaman | 0b7c015 | 2012-04-20 14:47:39 -0400 | [diff] [blame] | 1960 | nfs_cdata_cachep = kmem_cache_create("nfs_commit_data", |
| 1961 | sizeof(struct nfs_commit_data), |
| 1962 | 0, SLAB_HWCACHE_ALIGN, |
| 1963 | NULL); |
| 1964 | if (nfs_cdata_cachep == NULL) |
Jeff Layton | 3dd4765 | 2012-08-02 14:30:56 -0400 | [diff] [blame] | 1965 | goto out_destroy_write_mempool; |
Fred Isaman | 0b7c015 | 2012-04-20 14:47:39 -0400 | [diff] [blame] | 1966 | |
Matthew Dobson | 93d2341 | 2006-03-26 01:37:50 -0800 | [diff] [blame] | 1967 | nfs_commit_mempool = mempool_create_slab_pool(MIN_POOL_COMMIT, |
Yanchuan Nian | 4c10021 | 2012-11-12 09:27:37 +0800 | [diff] [blame] | 1968 | nfs_cdata_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1969 | if (nfs_commit_mempool == NULL) |
Jeff Layton | 3dd4765 | 2012-08-02 14:30:56 -0400 | [diff] [blame] | 1970 | goto out_destroy_commit_cache; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1971 | |
Peter Zijlstra | 89a0914 | 2007-03-16 13:38:26 -0800 | [diff] [blame] | 1972 | /* |
| 1973 | * NFS congestion size, scale with available memory. |
| 1974 | * |
| 1975 | * 64MB: 8192k |
| 1976 | * 128MB: 11585k |
| 1977 | * 256MB: 16384k |
| 1978 | * 512MB: 23170k |
| 1979 | * 1GB: 32768k |
| 1980 | * 2GB: 46340k |
| 1981 | * 4GB: 65536k |
| 1982 | * 8GB: 92681k |
| 1983 | * 16GB: 131072k |
| 1984 | * |
| 1985 | * This allows larger machines to have larger/more transfers. |
| 1986 | * Limit the default to 256M |
| 1987 | */ |
| 1988 | nfs_congestion_kb = (16*int_sqrt(totalram_pages)) << (PAGE_SHIFT-10); |
| 1989 | if (nfs_congestion_kb > 256*1024) |
| 1990 | nfs_congestion_kb = 256*1024; |
| 1991 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1992 | return 0; |
Jeff Layton | 3dd4765 | 2012-08-02 14:30:56 -0400 | [diff] [blame] | 1993 | |
| 1994 | out_destroy_commit_cache: |
| 1995 | kmem_cache_destroy(nfs_cdata_cachep); |
| 1996 | out_destroy_write_mempool: |
| 1997 | mempool_destroy(nfs_wdata_mempool); |
| 1998 | out_destroy_write_cache: |
| 1999 | kmem_cache_destroy(nfs_wdata_cachep); |
| 2000 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2001 | } |
| 2002 | |
David Brownell | 266bee8 | 2006-06-27 12:59:15 -0700 | [diff] [blame] | 2003 | void nfs_destroy_writepagecache(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2004 | { |
| 2005 | mempool_destroy(nfs_commit_mempool); |
Jeff Layton | 3dd4765 | 2012-08-02 14:30:56 -0400 | [diff] [blame] | 2006 | kmem_cache_destroy(nfs_cdata_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2007 | mempool_destroy(nfs_wdata_mempool); |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 2008 | kmem_cache_destroy(nfs_wdata_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2009 | } |
| 2010 | |
Anna Schumaker | 4a0de55 | 2014-05-06 09:12:30 -0400 | [diff] [blame] | 2011 | static const struct nfs_rw_ops nfs_rw_write_ops = { |
Anna Schumaker | a4cdda5 | 2014-05-06 09:12:31 -0400 | [diff] [blame] | 2012 | .rw_mode = FMODE_WRITE, |
Anna Schumaker | 4a0de55 | 2014-05-06 09:12:30 -0400 | [diff] [blame] | 2013 | .rw_alloc_header = nfs_writehdr_alloc, |
| 2014 | .rw_free_header = nfs_writehdr_free, |
Anna Schumaker | 0eecb21 | 2014-05-06 09:12:32 -0400 | [diff] [blame] | 2015 | .rw_done = nfs_writeback_done, |
| 2016 | .rw_result = nfs_writeback_result, |
Anna Schumaker | 1ed26f3 | 2014-05-06 09:12:37 -0400 | [diff] [blame] | 2017 | .rw_initiate = nfs_initiate_write, |
Anna Schumaker | 4a0de55 | 2014-05-06 09:12:30 -0400 | [diff] [blame] | 2018 | }; |