Boaz Harrosh | e806271 | 2008-10-27 18:37:02 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2005, 2006 |
Boaz Harrosh | 27d2e14 | 2009-06-14 17:23:09 +0300 | [diff] [blame] | 3 | * Avishay Traeger (avishay@gmail.com) |
Boaz Harrosh | e806271 | 2008-10-27 18:37:02 +0200 | [diff] [blame] | 4 | * Copyright (C) 2008, 2009 |
Boaz Harrosh | aa281ac | 2014-10-19 19:38:58 +0300 | [diff] [blame] | 5 | * Boaz Harrosh <ooo@electrozaur.com> |
Boaz Harrosh | e806271 | 2008-10-27 18:37:02 +0200 | [diff] [blame] | 6 | * |
| 7 | * Copyrights for code taken from ext2: |
| 8 | * Copyright (C) 1992, 1993, 1994, 1995 |
| 9 | * Remy Card (card@masi.ibp.fr) |
| 10 | * Laboratoire MASI - Institut Blaise Pascal |
| 11 | * Universite Pierre et Marie Curie (Paris VI) |
| 12 | * from |
| 13 | * linux/fs/minix/inode.c |
| 14 | * Copyright (C) 1991, 1992 Linus Torvalds |
| 15 | * |
| 16 | * This file is part of exofs. |
| 17 | * |
| 18 | * exofs is free software; you can redistribute it and/or modify |
| 19 | * it under the terms of the GNU General Public License as published by |
| 20 | * the Free Software Foundation. Since it is based on ext2, and the only |
| 21 | * valid version of GPL for the Linux kernel is version 2, the only valid |
| 22 | * version of GPL for exofs is version 2. |
| 23 | * |
| 24 | * exofs is distributed in the hope that it will be useful, |
| 25 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 26 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 27 | * GNU General Public License for more details. |
| 28 | * |
| 29 | * You should have received a copy of the GNU General Public License |
| 30 | * along with exofs; if not, write to the Free Software |
| 31 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 32 | */ |
| 33 | |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 34 | #include <linux/slab.h> |
Boaz Harrosh | e806271 | 2008-10-27 18:37:02 +0200 | [diff] [blame] | 35 | |
| 36 | #include "exofs.h" |
| 37 | |
Boaz Harrosh | fe33cc1 | 2009-11-01 18:28:14 +0200 | [diff] [blame] | 38 | #define EXOFS_DBGMSG2(M...) do {} while (0) |
| 39 | |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 40 | unsigned exofs_max_io_pages(struct ore_layout *layout, |
bharrosh@panasas.com | 66cd6ca | 2010-10-07 14:28:18 -0400 | [diff] [blame] | 41 | unsigned expected_pages) |
| 42 | { |
Boaz Harrosh | be388f3 | 2012-08-02 14:59:57 +0300 | [diff] [blame] | 43 | unsigned pages = min_t(unsigned, expected_pages, |
| 44 | layout->max_io_length / PAGE_SIZE); |
bharrosh@panasas.com | 66cd6ca | 2010-10-07 14:28:18 -0400 | [diff] [blame] | 45 | |
bharrosh@panasas.com | 66cd6ca | 2010-10-07 14:28:18 -0400 | [diff] [blame] | 46 | return pages; |
| 47 | } |
| 48 | |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 49 | struct page_collect { |
| 50 | struct exofs_sb_info *sbi; |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 51 | struct inode *inode; |
| 52 | unsigned expected_pages; |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 53 | struct ore_io_state *ios; |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 54 | |
Boaz Harrosh | 86093aa | 2010-01-28 18:24:06 +0200 | [diff] [blame] | 55 | struct page **pages; |
| 56 | unsigned alloc_pages; |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 57 | unsigned nr_pages; |
| 58 | unsigned long length; |
| 59 | loff_t pg_first; /* keep 64bit also in 32-arches */ |
Boaz Harrosh | f17b1f9 | 2010-10-07 13:37:51 -0400 | [diff] [blame] | 60 | bool read_4_write; /* This means two things: that the read is sync |
| 61 | * And the pages should not be unlocked. |
| 62 | */ |
Boaz Harrosh | dd29661 | 2011-10-12 15:42:07 +0200 | [diff] [blame] | 63 | struct page *that_locked_page; |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 64 | }; |
| 65 | |
| 66 | static void _pcol_init(struct page_collect *pcol, unsigned expected_pages, |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 67 | struct inode *inode) |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 68 | { |
| 69 | struct exofs_sb_info *sbi = inode->i_sb->s_fs_info; |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 70 | |
| 71 | pcol->sbi = sbi; |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 72 | pcol->inode = inode; |
| 73 | pcol->expected_pages = expected_pages; |
| 74 | |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 75 | pcol->ios = NULL; |
Boaz Harrosh | 86093aa | 2010-01-28 18:24:06 +0200 | [diff] [blame] | 76 | pcol->pages = NULL; |
| 77 | pcol->alloc_pages = 0; |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 78 | pcol->nr_pages = 0; |
| 79 | pcol->length = 0; |
| 80 | pcol->pg_first = -1; |
Boaz Harrosh | f17b1f9 | 2010-10-07 13:37:51 -0400 | [diff] [blame] | 81 | pcol->read_4_write = false; |
Boaz Harrosh | dd29661 | 2011-10-12 15:42:07 +0200 | [diff] [blame] | 82 | pcol->that_locked_page = NULL; |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 83 | } |
| 84 | |
| 85 | static void _pcol_reset(struct page_collect *pcol) |
| 86 | { |
| 87 | pcol->expected_pages -= min(pcol->nr_pages, pcol->expected_pages); |
| 88 | |
Boaz Harrosh | 86093aa | 2010-01-28 18:24:06 +0200 | [diff] [blame] | 89 | pcol->pages = NULL; |
| 90 | pcol->alloc_pages = 0; |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 91 | pcol->nr_pages = 0; |
| 92 | pcol->length = 0; |
| 93 | pcol->pg_first = -1; |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 94 | pcol->ios = NULL; |
Boaz Harrosh | dd29661 | 2011-10-12 15:42:07 +0200 | [diff] [blame] | 95 | pcol->that_locked_page = NULL; |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 96 | |
| 97 | /* this is probably the end of the loop but in writes |
| 98 | * it might not end here. don't be left with nothing |
| 99 | */ |
| 100 | if (!pcol->expected_pages) |
Boaz Harrosh | be388f3 | 2012-08-02 14:59:57 +0300 | [diff] [blame] | 101 | pcol->expected_pages = |
| 102 | exofs_max_io_pages(&pcol->sbi->layout, ~0); |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 103 | } |
| 104 | |
| 105 | static int pcol_try_alloc(struct page_collect *pcol) |
| 106 | { |
bharrosh@panasas.com | 66cd6ca | 2010-10-07 14:28:18 -0400 | [diff] [blame] | 107 | unsigned pages; |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 108 | |
Boaz Harrosh | 86093aa | 2010-01-28 18:24:06 +0200 | [diff] [blame] | 109 | /* TODO: easily support bio chaining */ |
bharrosh@panasas.com | 66cd6ca | 2010-10-07 14:28:18 -0400 | [diff] [blame] | 110 | pages = exofs_max_io_pages(&pcol->sbi->layout, pcol->expected_pages); |
Boaz Harrosh | 86093aa | 2010-01-28 18:24:06 +0200 | [diff] [blame] | 111 | |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 112 | for (; pages; pages >>= 1) { |
Boaz Harrosh | 86093aa | 2010-01-28 18:24:06 +0200 | [diff] [blame] | 113 | pcol->pages = kmalloc(pages * sizeof(struct page *), |
| 114 | GFP_KERNEL); |
| 115 | if (likely(pcol->pages)) { |
| 116 | pcol->alloc_pages = pages; |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 117 | return 0; |
Boaz Harrosh | 86093aa | 2010-01-28 18:24:06 +0200 | [diff] [blame] | 118 | } |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 119 | } |
| 120 | |
Boaz Harrosh | 86093aa | 2010-01-28 18:24:06 +0200 | [diff] [blame] | 121 | EXOFS_ERR("Failed to kmalloc expected_pages=%u\n", |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 122 | pcol->expected_pages); |
| 123 | return -ENOMEM; |
| 124 | } |
| 125 | |
| 126 | static void pcol_free(struct page_collect *pcol) |
| 127 | { |
Boaz Harrosh | 86093aa | 2010-01-28 18:24:06 +0200 | [diff] [blame] | 128 | kfree(pcol->pages); |
| 129 | pcol->pages = NULL; |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 130 | |
| 131 | if (pcol->ios) { |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 132 | ore_put_io_state(pcol->ios); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 133 | pcol->ios = NULL; |
| 134 | } |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 135 | } |
| 136 | |
| 137 | static int pcol_add_page(struct page_collect *pcol, struct page *page, |
| 138 | unsigned len) |
| 139 | { |
Boaz Harrosh | 86093aa | 2010-01-28 18:24:06 +0200 | [diff] [blame] | 140 | if (unlikely(pcol->nr_pages >= pcol->alloc_pages)) |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 141 | return -ENOMEM; |
| 142 | |
Boaz Harrosh | 86093aa | 2010-01-28 18:24:06 +0200 | [diff] [blame] | 143 | pcol->pages[pcol->nr_pages++] = page; |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 144 | pcol->length += len; |
| 145 | return 0; |
| 146 | } |
| 147 | |
Boaz Harrosh | 154a930 | 2011-08-26 21:00:32 -0700 | [diff] [blame] | 148 | enum {PAGE_WAS_NOT_IN_IO = 17}; |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 149 | static int update_read_page(struct page *page, int ret) |
| 150 | { |
Boaz Harrosh | 154a930 | 2011-08-26 21:00:32 -0700 | [diff] [blame] | 151 | switch (ret) { |
| 152 | case 0: |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 153 | /* Everything is OK */ |
| 154 | SetPageUptodate(page); |
| 155 | if (PageError(page)) |
| 156 | ClearPageError(page); |
Boaz Harrosh | 154a930 | 2011-08-26 21:00:32 -0700 | [diff] [blame] | 157 | break; |
| 158 | case -EFAULT: |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 159 | /* In this case we were trying to read something that wasn't on |
| 160 | * disk yet - return a page full of zeroes. This should be OK, |
| 161 | * because the object should be empty (if there was a write |
| 162 | * before this read, the read would be waiting with the page |
| 163 | * locked */ |
| 164 | clear_highpage(page); |
| 165 | |
| 166 | SetPageUptodate(page); |
| 167 | if (PageError(page)) |
| 168 | ClearPageError(page); |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 169 | EXOFS_DBGMSG("recovered read error\n"); |
Boaz Harrosh | 154a930 | 2011-08-26 21:00:32 -0700 | [diff] [blame] | 170 | /* fall through */ |
| 171 | case PAGE_WAS_NOT_IN_IO: |
| 172 | ret = 0; /* recovered error */ |
| 173 | break; |
| 174 | default: |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 175 | SetPageError(page); |
Boaz Harrosh | 154a930 | 2011-08-26 21:00:32 -0700 | [diff] [blame] | 176 | } |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 177 | return ret; |
| 178 | } |
| 179 | |
| 180 | static void update_write_page(struct page *page, int ret) |
| 181 | { |
Boaz Harrosh | 154a930 | 2011-08-26 21:00:32 -0700 | [diff] [blame] | 182 | if (unlikely(ret == PAGE_WAS_NOT_IN_IO)) |
| 183 | return; /* don't pass start don't collect $200 */ |
| 184 | |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 185 | if (ret) { |
| 186 | mapping_set_error(page->mapping, ret); |
| 187 | SetPageError(page); |
| 188 | } |
| 189 | end_page_writeback(page); |
| 190 | } |
| 191 | |
| 192 | /* Called at the end of reads, to optionally unlock pages and update their |
| 193 | * status. |
| 194 | */ |
Boaz Harrosh | 7aebf41 | 2010-10-13 12:55:43 -0400 | [diff] [blame] | 195 | static int __readpages_done(struct page_collect *pcol) |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 196 | { |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 197 | int i; |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 198 | u64 good_bytes; |
| 199 | u64 length = 0; |
Boaz Harrosh | 4b46c9f | 2011-09-28 13:25:50 +0300 | [diff] [blame] | 200 | int ret = ore_check_io(pcol->ios, NULL); |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 201 | |
Boaz Harrosh | 154a930 | 2011-08-26 21:00:32 -0700 | [diff] [blame] | 202 | if (likely(!ret)) { |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 203 | good_bytes = pcol->length; |
Boaz Harrosh | 154a930 | 2011-08-26 21:00:32 -0700 | [diff] [blame] | 204 | ret = PAGE_WAS_NOT_IN_IO; |
| 205 | } else { |
Boaz Harrosh | 4b46c9f | 2011-09-28 13:25:50 +0300 | [diff] [blame] | 206 | good_bytes = 0; |
Boaz Harrosh | 154a930 | 2011-08-26 21:00:32 -0700 | [diff] [blame] | 207 | } |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 208 | |
Boaz Harrosh | 34ce4e7c | 2009-12-15 19:34:17 +0200 | [diff] [blame] | 209 | EXOFS_DBGMSG2("readpages_done(0x%lx) good_bytes=0x%llx" |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 210 | " length=0x%lx nr_pages=%u\n", |
| 211 | pcol->inode->i_ino, _LLU(good_bytes), pcol->length, |
| 212 | pcol->nr_pages); |
| 213 | |
Boaz Harrosh | 86093aa | 2010-01-28 18:24:06 +0200 | [diff] [blame] | 214 | for (i = 0; i < pcol->nr_pages; i++) { |
| 215 | struct page *page = pcol->pages[i]; |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 216 | struct inode *inode = page->mapping->host; |
| 217 | int page_stat; |
| 218 | |
| 219 | if (inode != pcol->inode) |
| 220 | continue; /* osd might add more pages at end */ |
| 221 | |
| 222 | if (likely(length < good_bytes)) |
| 223 | page_stat = 0; |
| 224 | else |
| 225 | page_stat = ret; |
| 226 | |
Boaz Harrosh | fe33cc1 | 2009-11-01 18:28:14 +0200 | [diff] [blame] | 227 | EXOFS_DBGMSG2(" readpages_done(0x%lx, 0x%lx) %s\n", |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 228 | inode->i_ino, page->index, |
| 229 | page_stat ? "bad_bytes" : "good_bytes"); |
| 230 | |
| 231 | ret = update_read_page(page, page_stat); |
Boaz Harrosh | 7aebf41 | 2010-10-13 12:55:43 -0400 | [diff] [blame] | 232 | if (!pcol->read_4_write) |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 233 | unlock_page(page); |
Boaz Harrosh | 86093aa | 2010-01-28 18:24:06 +0200 | [diff] [blame] | 234 | length += PAGE_SIZE; |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 235 | } |
| 236 | |
| 237 | pcol_free(pcol); |
Boaz Harrosh | 34ce4e7c | 2009-12-15 19:34:17 +0200 | [diff] [blame] | 238 | EXOFS_DBGMSG2("readpages_done END\n"); |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 239 | return ret; |
| 240 | } |
| 241 | |
| 242 | /* callback of async reads */ |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 243 | static void readpages_done(struct ore_io_state *ios, void *p) |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 244 | { |
| 245 | struct page_collect *pcol = p; |
| 246 | |
Boaz Harrosh | 7aebf41 | 2010-10-13 12:55:43 -0400 | [diff] [blame] | 247 | __readpages_done(pcol); |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 248 | atomic_dec(&pcol->sbi->s_curr_pending); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 249 | kfree(pcol); |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 250 | } |
| 251 | |
| 252 | static void _unlock_pcol_pages(struct page_collect *pcol, int ret, int rw) |
| 253 | { |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 254 | int i; |
| 255 | |
Boaz Harrosh | 86093aa | 2010-01-28 18:24:06 +0200 | [diff] [blame] | 256 | for (i = 0; i < pcol->nr_pages; i++) { |
| 257 | struct page *page = pcol->pages[i]; |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 258 | |
| 259 | if (rw == READ) |
| 260 | update_read_page(page, ret); |
| 261 | else |
| 262 | update_write_page(page, ret); |
| 263 | |
| 264 | unlock_page(page); |
| 265 | } |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 266 | } |
| 267 | |
Boaz Harrosh | b916c5c | 2011-09-28 11:55:51 +0300 | [diff] [blame] | 268 | static int _maybe_not_all_in_one_io(struct ore_io_state *ios, |
| 269 | struct page_collect *pcol_src, struct page_collect *pcol) |
| 270 | { |
| 271 | /* length was wrong or offset was not page aligned */ |
| 272 | BUG_ON(pcol_src->nr_pages < ios->nr_pages); |
| 273 | |
| 274 | if (pcol_src->nr_pages > ios->nr_pages) { |
| 275 | struct page **src_page; |
| 276 | unsigned pages_less = pcol_src->nr_pages - ios->nr_pages; |
| 277 | unsigned long len_less = pcol_src->length - ios->length; |
| 278 | unsigned i; |
| 279 | int ret; |
| 280 | |
| 281 | /* This IO was trimmed */ |
| 282 | pcol_src->nr_pages = ios->nr_pages; |
| 283 | pcol_src->length = ios->length; |
| 284 | |
| 285 | /* Left over pages are passed to the next io */ |
| 286 | pcol->expected_pages += pages_less; |
| 287 | pcol->nr_pages = pages_less; |
| 288 | pcol->length = len_less; |
| 289 | src_page = pcol_src->pages + pcol_src->nr_pages; |
| 290 | pcol->pg_first = (*src_page)->index; |
| 291 | |
| 292 | ret = pcol_try_alloc(pcol); |
| 293 | if (unlikely(ret)) |
| 294 | return ret; |
| 295 | |
| 296 | for (i = 0; i < pages_less; ++i) |
| 297 | pcol->pages[i] = *src_page++; |
| 298 | |
| 299 | EXOFS_DBGMSG("Length was adjusted nr_pages=0x%x " |
| 300 | "pages_less=0x%x expected_pages=0x%x " |
| 301 | "next_offset=0x%llx next_len=0x%lx\n", |
| 302 | pcol_src->nr_pages, pages_less, pcol->expected_pages, |
| 303 | pcol->pg_first * PAGE_SIZE, pcol->length); |
| 304 | } |
| 305 | return 0; |
| 306 | } |
| 307 | |
Boaz Harrosh | 7aebf41 | 2010-10-13 12:55:43 -0400 | [diff] [blame] | 308 | static int read_exec(struct page_collect *pcol) |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 309 | { |
| 310 | struct exofs_i_info *oi = exofs_i(pcol->inode); |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 311 | struct ore_io_state *ios; |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 312 | struct page_collect *pcol_copy = NULL; |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 313 | int ret; |
| 314 | |
Boaz Harrosh | 86093aa | 2010-01-28 18:24:06 +0200 | [diff] [blame] | 315 | if (!pcol->pages) |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 316 | return 0; |
| 317 | |
Boaz Harrosh | e1042ba | 2010-11-16 20:09:58 +0200 | [diff] [blame] | 318 | if (!pcol->ios) { |
Boaz Harrosh | 5bf696d | 2011-09-28 11:39:59 +0300 | [diff] [blame] | 319 | int ret = ore_get_rw_state(&pcol->sbi->layout, &oi->oc, true, |
Boaz Harrosh | e1042ba | 2010-11-16 20:09:58 +0200 | [diff] [blame] | 320 | pcol->pg_first << PAGE_CACHE_SHIFT, |
| 321 | pcol->length, &pcol->ios); |
| 322 | |
| 323 | if (ret) |
| 324 | return ret; |
| 325 | } |
| 326 | |
| 327 | ios = pcol->ios; |
Boaz Harrosh | 86093aa | 2010-01-28 18:24:06 +0200 | [diff] [blame] | 328 | ios->pages = pcol->pages; |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 329 | |
Boaz Harrosh | 7aebf41 | 2010-10-13 12:55:43 -0400 | [diff] [blame] | 330 | if (pcol->read_4_write) { |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 331 | ore_read(pcol->ios); |
Boaz Harrosh | 7aebf41 | 2010-10-13 12:55:43 -0400 | [diff] [blame] | 332 | return __readpages_done(pcol); |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 333 | } |
| 334 | |
| 335 | pcol_copy = kmalloc(sizeof(*pcol_copy), GFP_KERNEL); |
| 336 | if (!pcol_copy) { |
| 337 | ret = -ENOMEM; |
| 338 | goto err; |
| 339 | } |
| 340 | |
| 341 | *pcol_copy = *pcol; |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 342 | ios->done = readpages_done; |
| 343 | ios->private = pcol_copy; |
Boaz Harrosh | b916c5c | 2011-09-28 11:55:51 +0300 | [diff] [blame] | 344 | |
| 345 | /* pages ownership was passed to pcol_copy */ |
| 346 | _pcol_reset(pcol); |
| 347 | |
| 348 | ret = _maybe_not_all_in_one_io(ios, pcol_copy, pcol); |
| 349 | if (unlikely(ret)) |
| 350 | goto err; |
| 351 | |
| 352 | EXOFS_DBGMSG2("read_exec(0x%lx) offset=0x%llx length=0x%llx\n", |
| 353 | pcol->inode->i_ino, _LLU(ios->offset), _LLU(ios->length)); |
| 354 | |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 355 | ret = ore_read(ios); |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 356 | if (unlikely(ret)) |
| 357 | goto err; |
| 358 | |
| 359 | atomic_inc(&pcol->sbi->s_curr_pending); |
| 360 | |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 361 | return 0; |
| 362 | |
| 363 | err: |
Boaz Harrosh | 861d666 | 2012-11-30 16:03:31 +0200 | [diff] [blame] | 364 | if (!pcol_copy) /* Failed before ownership transfer */ |
| 365 | pcol_copy = pcol; |
| 366 | _unlock_pcol_pages(pcol_copy, ret, READ); |
| 367 | pcol_free(pcol_copy); |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 368 | kfree(pcol_copy); |
Boaz Harrosh | 861d666 | 2012-11-30 16:03:31 +0200 | [diff] [blame] | 369 | |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 370 | return ret; |
| 371 | } |
| 372 | |
| 373 | /* readpage_strip is called either directly from readpage() or by the VFS from |
| 374 | * within read_cache_pages(), to add one more page to be read. It will try to |
| 375 | * collect as many contiguous pages as posible. If a discontinuity is |
| 376 | * encountered, or it runs out of resources, it will submit the previous segment |
| 377 | * and will start a new collection. Eventually caller must submit the last |
| 378 | * segment if present. |
| 379 | */ |
| 380 | static int readpage_strip(void *data, struct page *page) |
| 381 | { |
| 382 | struct page_collect *pcol = data; |
| 383 | struct inode *inode = pcol->inode; |
| 384 | struct exofs_i_info *oi = exofs_i(inode); |
| 385 | loff_t i_size = i_size_read(inode); |
| 386 | pgoff_t end_index = i_size >> PAGE_CACHE_SHIFT; |
| 387 | size_t len; |
| 388 | int ret; |
| 389 | |
Kautuk Consul | 0e8d96d | 2012-02-20 03:46:12 -0500 | [diff] [blame] | 390 | BUG_ON(!PageLocked(page)); |
| 391 | |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 392 | /* FIXME: Just for debugging, will be removed */ |
| 393 | if (PageUptodate(page)) |
| 394 | EXOFS_ERR("PageUptodate(0x%lx, 0x%lx)\n", pcol->inode->i_ino, |
| 395 | page->index); |
| 396 | |
Boaz Harrosh | dd29661 | 2011-10-12 15:42:07 +0200 | [diff] [blame] | 397 | pcol->that_locked_page = page; |
| 398 | |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 399 | if (page->index < end_index) |
| 400 | len = PAGE_CACHE_SIZE; |
| 401 | else if (page->index == end_index) |
| 402 | len = i_size & ~PAGE_CACHE_MASK; |
| 403 | else |
| 404 | len = 0; |
| 405 | |
| 406 | if (!len || !obj_created(oi)) { |
| 407 | /* this will be out of bounds, or doesn't exist yet. |
| 408 | * Current page is cleared and the request is split |
| 409 | */ |
| 410 | clear_highpage(page); |
| 411 | |
| 412 | SetPageUptodate(page); |
| 413 | if (PageError(page)) |
| 414 | ClearPageError(page); |
| 415 | |
Boaz Harrosh | f17b1f9 | 2010-10-07 13:37:51 -0400 | [diff] [blame] | 416 | if (!pcol->read_4_write) |
| 417 | unlock_page(page); |
Boaz Harrosh | a8f1418 | 2010-11-22 18:02:45 +0200 | [diff] [blame] | 418 | EXOFS_DBGMSG("readpage_strip(0x%lx) empty page len=%zx " |
| 419 | "read_4_write=%d index=0x%lx end_index=0x%lx " |
| 420 | "splitting\n", inode->i_ino, len, |
| 421 | pcol->read_4_write, page->index, end_index); |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 422 | |
Boaz Harrosh | 7aebf41 | 2010-10-13 12:55:43 -0400 | [diff] [blame] | 423 | return read_exec(pcol); |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 424 | } |
| 425 | |
| 426 | try_again: |
| 427 | |
| 428 | if (unlikely(pcol->pg_first == -1)) { |
| 429 | pcol->pg_first = page->index; |
| 430 | } else if (unlikely((pcol->pg_first + pcol->nr_pages) != |
| 431 | page->index)) { |
| 432 | /* Discontinuity detected, split the request */ |
Boaz Harrosh | 7aebf41 | 2010-10-13 12:55:43 -0400 | [diff] [blame] | 433 | ret = read_exec(pcol); |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 434 | if (unlikely(ret)) |
| 435 | goto fail; |
| 436 | goto try_again; |
| 437 | } |
| 438 | |
Boaz Harrosh | 86093aa | 2010-01-28 18:24:06 +0200 | [diff] [blame] | 439 | if (!pcol->pages) { |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 440 | ret = pcol_try_alloc(pcol); |
| 441 | if (unlikely(ret)) |
| 442 | goto fail; |
| 443 | } |
| 444 | |
| 445 | if (len != PAGE_CACHE_SIZE) |
| 446 | zero_user(page, len, PAGE_CACHE_SIZE - len); |
| 447 | |
Boaz Harrosh | fe33cc1 | 2009-11-01 18:28:14 +0200 | [diff] [blame] | 448 | EXOFS_DBGMSG2(" readpage_strip(0x%lx, 0x%lx) len=0x%zx\n", |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 449 | inode->i_ino, page->index, len); |
| 450 | |
| 451 | ret = pcol_add_page(pcol, page, len); |
| 452 | if (ret) { |
Boaz Harrosh | fe33cc1 | 2009-11-01 18:28:14 +0200 | [diff] [blame] | 453 | EXOFS_DBGMSG2("Failed pcol_add_page pages[i]=%p " |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 454 | "this_len=0x%zx nr_pages=%u length=0x%lx\n", |
| 455 | page, len, pcol->nr_pages, pcol->length); |
| 456 | |
| 457 | /* split the request, and start again with current page */ |
Boaz Harrosh | 7aebf41 | 2010-10-13 12:55:43 -0400 | [diff] [blame] | 458 | ret = read_exec(pcol); |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 459 | if (unlikely(ret)) |
| 460 | goto fail; |
| 461 | |
| 462 | goto try_again; |
| 463 | } |
| 464 | |
| 465 | return 0; |
| 466 | |
| 467 | fail: |
| 468 | /* SetPageError(page); ??? */ |
| 469 | unlock_page(page); |
| 470 | return ret; |
| 471 | } |
| 472 | |
| 473 | static int exofs_readpages(struct file *file, struct address_space *mapping, |
| 474 | struct list_head *pages, unsigned nr_pages) |
| 475 | { |
| 476 | struct page_collect pcol; |
| 477 | int ret; |
| 478 | |
| 479 | _pcol_init(&pcol, nr_pages, mapping->host); |
| 480 | |
| 481 | ret = read_cache_pages(mapping, pages, readpage_strip, &pcol); |
| 482 | if (ret) { |
| 483 | EXOFS_ERR("read_cache_pages => %d\n", ret); |
| 484 | return ret; |
| 485 | } |
| 486 | |
Boaz Harrosh | b916c5c | 2011-09-28 11:55:51 +0300 | [diff] [blame] | 487 | ret = read_exec(&pcol); |
| 488 | if (unlikely(ret)) |
| 489 | return ret; |
| 490 | |
Boaz Harrosh | 7aebf41 | 2010-10-13 12:55:43 -0400 | [diff] [blame] | 491 | return read_exec(&pcol); |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 492 | } |
| 493 | |
Boaz Harrosh | 7aebf41 | 2010-10-13 12:55:43 -0400 | [diff] [blame] | 494 | static int _readpage(struct page *page, bool read_4_write) |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 495 | { |
| 496 | struct page_collect pcol; |
| 497 | int ret; |
| 498 | |
| 499 | _pcol_init(&pcol, 1, page->mapping->host); |
| 500 | |
Boaz Harrosh | 7aebf41 | 2010-10-13 12:55:43 -0400 | [diff] [blame] | 501 | pcol.read_4_write = read_4_write; |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 502 | ret = readpage_strip(&pcol, page); |
| 503 | if (ret) { |
| 504 | EXOFS_ERR("_readpage => %d\n", ret); |
| 505 | return ret; |
| 506 | } |
| 507 | |
Boaz Harrosh | 7aebf41 | 2010-10-13 12:55:43 -0400 | [diff] [blame] | 508 | return read_exec(&pcol); |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 509 | } |
| 510 | |
| 511 | /* |
| 512 | * We don't need the file |
| 513 | */ |
| 514 | static int exofs_readpage(struct file *file, struct page *page) |
| 515 | { |
| 516 | return _readpage(page, false); |
| 517 | } |
| 518 | |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 519 | /* Callback for osd_write. All writes are asynchronous */ |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 520 | static void writepages_done(struct ore_io_state *ios, void *p) |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 521 | { |
| 522 | struct page_collect *pcol = p; |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 523 | int i; |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 524 | u64 good_bytes; |
| 525 | u64 length = 0; |
Boaz Harrosh | 4b46c9f | 2011-09-28 13:25:50 +0300 | [diff] [blame] | 526 | int ret = ore_check_io(ios, NULL); |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 527 | |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 528 | atomic_dec(&pcol->sbi->s_curr_pending); |
| 529 | |
Boaz Harrosh | 154a930 | 2011-08-26 21:00:32 -0700 | [diff] [blame] | 530 | if (likely(!ret)) { |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 531 | good_bytes = pcol->length; |
Boaz Harrosh | 154a930 | 2011-08-26 21:00:32 -0700 | [diff] [blame] | 532 | ret = PAGE_WAS_NOT_IN_IO; |
| 533 | } else { |
Boaz Harrosh | 4b46c9f | 2011-09-28 13:25:50 +0300 | [diff] [blame] | 534 | good_bytes = 0; |
Boaz Harrosh | 154a930 | 2011-08-26 21:00:32 -0700 | [diff] [blame] | 535 | } |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 536 | |
Boaz Harrosh | 34ce4e7c | 2009-12-15 19:34:17 +0200 | [diff] [blame] | 537 | EXOFS_DBGMSG2("writepages_done(0x%lx) good_bytes=0x%llx" |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 538 | " length=0x%lx nr_pages=%u\n", |
| 539 | pcol->inode->i_ino, _LLU(good_bytes), pcol->length, |
| 540 | pcol->nr_pages); |
| 541 | |
Boaz Harrosh | 86093aa | 2010-01-28 18:24:06 +0200 | [diff] [blame] | 542 | for (i = 0; i < pcol->nr_pages; i++) { |
| 543 | struct page *page = pcol->pages[i]; |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 544 | struct inode *inode = page->mapping->host; |
| 545 | int page_stat; |
| 546 | |
| 547 | if (inode != pcol->inode) |
| 548 | continue; /* osd might add more pages to a bio */ |
| 549 | |
| 550 | if (likely(length < good_bytes)) |
| 551 | page_stat = 0; |
| 552 | else |
| 553 | page_stat = ret; |
| 554 | |
| 555 | update_write_page(page, page_stat); |
| 556 | unlock_page(page); |
Boaz Harrosh | fe33cc1 | 2009-11-01 18:28:14 +0200 | [diff] [blame] | 557 | EXOFS_DBGMSG2(" writepages_done(0x%lx, 0x%lx) status=%d\n", |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 558 | inode->i_ino, page->index, page_stat); |
| 559 | |
Boaz Harrosh | 86093aa | 2010-01-28 18:24:06 +0200 | [diff] [blame] | 560 | length += PAGE_SIZE; |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 561 | } |
| 562 | |
| 563 | pcol_free(pcol); |
| 564 | kfree(pcol); |
Boaz Harrosh | 34ce4e7c | 2009-12-15 19:34:17 +0200 | [diff] [blame] | 565 | EXOFS_DBGMSG2("writepages_done END\n"); |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 566 | } |
| 567 | |
Boaz Harrosh | dd29661 | 2011-10-12 15:42:07 +0200 | [diff] [blame] | 568 | static struct page *__r4w_get_page(void *priv, u64 offset, bool *uptodate) |
| 569 | { |
| 570 | struct page_collect *pcol = priv; |
| 571 | pgoff_t index = offset / PAGE_SIZE; |
| 572 | |
| 573 | if (!pcol->that_locked_page || |
| 574 | (pcol->that_locked_page->index != index)) { |
Boaz Harrosh | 4b74f6e | 2012-07-20 15:50:27 +0300 | [diff] [blame] | 575 | struct page *page; |
| 576 | loff_t i_size = i_size_read(pcol->inode); |
Boaz Harrosh | dd29661 | 2011-10-12 15:42:07 +0200 | [diff] [blame] | 577 | |
Boaz Harrosh | 4b74f6e | 2012-07-20 15:50:27 +0300 | [diff] [blame] | 578 | if (offset >= i_size) { |
| 579 | *uptodate = true; |
Boaz Harrosh | 19350e7 | 2014-01-14 16:26:13 +0200 | [diff] [blame] | 580 | EXOFS_DBGMSG2("offset >= i_size index=0x%lx\n", index); |
Boaz Harrosh | 4b74f6e | 2012-07-20 15:50:27 +0300 | [diff] [blame] | 581 | return ZERO_PAGE(0); |
| 582 | } |
| 583 | |
| 584 | page = find_get_page(pcol->inode->i_mapping, index); |
Boaz Harrosh | dd29661 | 2011-10-12 15:42:07 +0200 | [diff] [blame] | 585 | if (!page) { |
| 586 | page = find_or_create_page(pcol->inode->i_mapping, |
| 587 | index, GFP_NOFS); |
| 588 | if (unlikely(!page)) { |
| 589 | EXOFS_DBGMSG("grab_cache_page Failed " |
| 590 | "index=0x%llx\n", _LLU(index)); |
| 591 | return NULL; |
| 592 | } |
| 593 | unlock_page(page); |
| 594 | } |
| 595 | if (PageDirty(page) || PageWriteback(page)) |
| 596 | *uptodate = true; |
| 597 | else |
| 598 | *uptodate = PageUptodate(page); |
Boaz Harrosh | 19350e7 | 2014-01-14 16:26:13 +0200 | [diff] [blame] | 599 | EXOFS_DBGMSG2("index=0x%lx uptodate=%d\n", index, *uptodate); |
Boaz Harrosh | dd29661 | 2011-10-12 15:42:07 +0200 | [diff] [blame] | 600 | return page; |
| 601 | } else { |
Boaz Harrosh | 19350e7 | 2014-01-14 16:26:13 +0200 | [diff] [blame] | 602 | EXOFS_DBGMSG2("YES that_locked_page index=0x%lx\n", |
Boaz Harrosh | dd29661 | 2011-10-12 15:42:07 +0200 | [diff] [blame] | 603 | pcol->that_locked_page->index); |
| 604 | *uptodate = true; |
| 605 | return pcol->that_locked_page; |
| 606 | } |
| 607 | } |
| 608 | |
| 609 | static void __r4w_put_page(void *priv, struct page *page) |
| 610 | { |
| 611 | struct page_collect *pcol = priv; |
| 612 | |
Boaz Harrosh | 4b74f6e | 2012-07-20 15:50:27 +0300 | [diff] [blame] | 613 | if ((pcol->that_locked_page != page) && (ZERO_PAGE(0) != page)) { |
Boaz Harrosh | 19350e7 | 2014-01-14 16:26:13 +0200 | [diff] [blame] | 614 | EXOFS_DBGMSG2("index=0x%lx\n", page->index); |
Boaz Harrosh | dd29661 | 2011-10-12 15:42:07 +0200 | [diff] [blame] | 615 | page_cache_release(page); |
| 616 | return; |
| 617 | } |
Boaz Harrosh | 19350e7 | 2014-01-14 16:26:13 +0200 | [diff] [blame] | 618 | EXOFS_DBGMSG2("that_locked_page index=0x%lx\n", |
Boaz Harrosh | 4b74f6e | 2012-07-20 15:50:27 +0300 | [diff] [blame] | 619 | ZERO_PAGE(0) == page ? -1 : page->index); |
Boaz Harrosh | dd29661 | 2011-10-12 15:42:07 +0200 | [diff] [blame] | 620 | } |
| 621 | |
| 622 | static const struct _ore_r4w_op _r4w_op = { |
| 623 | .get_page = &__r4w_get_page, |
| 624 | .put_page = &__r4w_put_page, |
| 625 | }; |
| 626 | |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 627 | static int write_exec(struct page_collect *pcol) |
| 628 | { |
| 629 | struct exofs_i_info *oi = exofs_i(pcol->inode); |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 630 | struct ore_io_state *ios; |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 631 | struct page_collect *pcol_copy = NULL; |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 632 | int ret; |
| 633 | |
Boaz Harrosh | 86093aa | 2010-01-28 18:24:06 +0200 | [diff] [blame] | 634 | if (!pcol->pages) |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 635 | return 0; |
| 636 | |
Boaz Harrosh | e1042ba | 2010-11-16 20:09:58 +0200 | [diff] [blame] | 637 | BUG_ON(pcol->ios); |
Boaz Harrosh | 5bf696d | 2011-09-28 11:39:59 +0300 | [diff] [blame] | 638 | ret = ore_get_rw_state(&pcol->sbi->layout, &oi->oc, false, |
Boaz Harrosh | e1042ba | 2010-11-16 20:09:58 +0200 | [diff] [blame] | 639 | pcol->pg_first << PAGE_CACHE_SHIFT, |
| 640 | pcol->length, &pcol->ios); |
Boaz Harrosh | e1042ba | 2010-11-16 20:09:58 +0200 | [diff] [blame] | 641 | if (unlikely(ret)) |
| 642 | goto err; |
| 643 | |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 644 | pcol_copy = kmalloc(sizeof(*pcol_copy), GFP_KERNEL); |
| 645 | if (!pcol_copy) { |
Joe Perches | 571f7f4 | 2010-10-21 22:17:17 -0700 | [diff] [blame] | 646 | EXOFS_ERR("write_exec: Failed to kmalloc(pcol)\n"); |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 647 | ret = -ENOMEM; |
| 648 | goto err; |
| 649 | } |
| 650 | |
| 651 | *pcol_copy = *pcol; |
| 652 | |
Boaz Harrosh | e1042ba | 2010-11-16 20:09:58 +0200 | [diff] [blame] | 653 | ios = pcol->ios; |
Boaz Harrosh | 86093aa | 2010-01-28 18:24:06 +0200 | [diff] [blame] | 654 | ios->pages = pcol_copy->pages; |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 655 | ios->done = writepages_done; |
Boaz Harrosh | dd29661 | 2011-10-12 15:42:07 +0200 | [diff] [blame] | 656 | ios->r4w = &_r4w_op; |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 657 | ios->private = pcol_copy; |
| 658 | |
Boaz Harrosh | b916c5c | 2011-09-28 11:55:51 +0300 | [diff] [blame] | 659 | /* pages ownership was passed to pcol_copy */ |
| 660 | _pcol_reset(pcol); |
| 661 | |
| 662 | ret = _maybe_not_all_in_one_io(ios, pcol_copy, pcol); |
| 663 | if (unlikely(ret)) |
| 664 | goto err; |
| 665 | |
| 666 | EXOFS_DBGMSG2("write_exec(0x%lx) offset=0x%llx length=0x%llx\n", |
| 667 | pcol->inode->i_ino, _LLU(ios->offset), _LLU(ios->length)); |
| 668 | |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 669 | ret = ore_write(ios); |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 670 | if (unlikely(ret)) { |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 671 | EXOFS_ERR("write_exec: ore_write() Failed\n"); |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 672 | goto err; |
| 673 | } |
| 674 | |
| 675 | atomic_inc(&pcol->sbi->s_curr_pending); |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 676 | return 0; |
| 677 | |
| 678 | err: |
Idan Kedar | af402ab | 2012-11-30 16:03:31 +0200 | [diff] [blame] | 679 | if (!pcol_copy) /* Failed before ownership transfer */ |
| 680 | pcol_copy = pcol; |
| 681 | _unlock_pcol_pages(pcol_copy, ret, WRITE); |
| 682 | pcol_free(pcol_copy); |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 683 | kfree(pcol_copy); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 684 | |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 685 | return ret; |
| 686 | } |
| 687 | |
| 688 | /* writepage_strip is called either directly from writepage() or by the VFS from |
| 689 | * within write_cache_pages(), to add one more page to be written to storage. |
| 690 | * It will try to collect as many contiguous pages as possible. If a |
| 691 | * discontinuity is encountered or it runs out of resources it will submit the |
| 692 | * previous segment and will start a new collection. |
| 693 | * Eventually caller must submit the last segment if present. |
| 694 | */ |
| 695 | static int writepage_strip(struct page *page, |
| 696 | struct writeback_control *wbc_unused, void *data) |
| 697 | { |
| 698 | struct page_collect *pcol = data; |
| 699 | struct inode *inode = pcol->inode; |
| 700 | struct exofs_i_info *oi = exofs_i(inode); |
| 701 | loff_t i_size = i_size_read(inode); |
| 702 | pgoff_t end_index = i_size >> PAGE_CACHE_SHIFT; |
| 703 | size_t len; |
| 704 | int ret; |
| 705 | |
| 706 | BUG_ON(!PageLocked(page)); |
| 707 | |
| 708 | ret = wait_obj_created(oi); |
| 709 | if (unlikely(ret)) |
| 710 | goto fail; |
| 711 | |
| 712 | if (page->index < end_index) |
| 713 | /* in this case, the page is within the limits of the file */ |
| 714 | len = PAGE_CACHE_SIZE; |
| 715 | else { |
| 716 | len = i_size & ~PAGE_CACHE_MASK; |
| 717 | |
| 718 | if (page->index > end_index || !len) { |
| 719 | /* in this case, the page is outside the limits |
| 720 | * (truncate in progress) |
| 721 | */ |
| 722 | ret = write_exec(pcol); |
| 723 | if (unlikely(ret)) |
| 724 | goto fail; |
| 725 | if (PageError(page)) |
| 726 | ClearPageError(page); |
| 727 | unlock_page(page); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 728 | EXOFS_DBGMSG("writepage_strip(0x%lx, 0x%lx) " |
| 729 | "outside the limits\n", |
| 730 | inode->i_ino, page->index); |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 731 | return 0; |
| 732 | } |
| 733 | } |
| 734 | |
| 735 | try_again: |
| 736 | |
| 737 | if (unlikely(pcol->pg_first == -1)) { |
| 738 | pcol->pg_first = page->index; |
| 739 | } else if (unlikely((pcol->pg_first + pcol->nr_pages) != |
| 740 | page->index)) { |
| 741 | /* Discontinuity detected, split the request */ |
| 742 | ret = write_exec(pcol); |
| 743 | if (unlikely(ret)) |
| 744 | goto fail; |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 745 | |
| 746 | EXOFS_DBGMSG("writepage_strip(0x%lx, 0x%lx) Discontinuity\n", |
| 747 | inode->i_ino, page->index); |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 748 | goto try_again; |
| 749 | } |
| 750 | |
Boaz Harrosh | 86093aa | 2010-01-28 18:24:06 +0200 | [diff] [blame] | 751 | if (!pcol->pages) { |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 752 | ret = pcol_try_alloc(pcol); |
| 753 | if (unlikely(ret)) |
| 754 | goto fail; |
| 755 | } |
| 756 | |
Boaz Harrosh | fe33cc1 | 2009-11-01 18:28:14 +0200 | [diff] [blame] | 757 | EXOFS_DBGMSG2(" writepage_strip(0x%lx, 0x%lx) len=0x%zx\n", |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 758 | inode->i_ino, page->index, len); |
| 759 | |
| 760 | ret = pcol_add_page(pcol, page, len); |
| 761 | if (unlikely(ret)) { |
Boaz Harrosh | 34ce4e7c | 2009-12-15 19:34:17 +0200 | [diff] [blame] | 762 | EXOFS_DBGMSG2("Failed pcol_add_page " |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 763 | "nr_pages=%u total_length=0x%lx\n", |
| 764 | pcol->nr_pages, pcol->length); |
| 765 | |
| 766 | /* split the request, next loop will start again */ |
| 767 | ret = write_exec(pcol); |
| 768 | if (unlikely(ret)) { |
Joe Perches | 571f7f4 | 2010-10-21 22:17:17 -0700 | [diff] [blame] | 769 | EXOFS_DBGMSG("write_exec failed => %d", ret); |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 770 | goto fail; |
| 771 | } |
| 772 | |
| 773 | goto try_again; |
| 774 | } |
| 775 | |
| 776 | BUG_ON(PageWriteback(page)); |
| 777 | set_page_writeback(page); |
| 778 | |
| 779 | return 0; |
| 780 | |
| 781 | fail: |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 782 | EXOFS_DBGMSG("Error: writepage_strip(0x%lx, 0x%lx)=>%d\n", |
| 783 | inode->i_ino, page->index, ret); |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 784 | set_bit(AS_EIO, &page->mapping->flags); |
| 785 | unlock_page(page); |
| 786 | return ret; |
| 787 | } |
| 788 | |
| 789 | static int exofs_writepages(struct address_space *mapping, |
| 790 | struct writeback_control *wbc) |
| 791 | { |
| 792 | struct page_collect pcol; |
| 793 | long start, end, expected_pages; |
| 794 | int ret; |
| 795 | |
| 796 | start = wbc->range_start >> PAGE_CACHE_SHIFT; |
| 797 | end = (wbc->range_end == LLONG_MAX) ? |
| 798 | start + mapping->nrpages : |
| 799 | wbc->range_end >> PAGE_CACHE_SHIFT; |
| 800 | |
| 801 | if (start || end) |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 802 | expected_pages = end - start + 1; |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 803 | else |
| 804 | expected_pages = mapping->nrpages; |
| 805 | |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 806 | if (expected_pages < 32L) |
| 807 | expected_pages = 32L; |
| 808 | |
Boaz Harrosh | 34ce4e7c | 2009-12-15 19:34:17 +0200 | [diff] [blame] | 809 | EXOFS_DBGMSG2("inode(0x%lx) wbc->start=0x%llx wbc->end=0x%llx " |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 810 | "nrpages=%lu start=0x%lx end=0x%lx expected_pages=%ld\n", |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 811 | mapping->host->i_ino, wbc->range_start, wbc->range_end, |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 812 | mapping->nrpages, start, end, expected_pages); |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 813 | |
| 814 | _pcol_init(&pcol, expected_pages, mapping->host); |
| 815 | |
| 816 | ret = write_cache_pages(mapping, wbc, writepage_strip, &pcol); |
Boaz Harrosh | b916c5c | 2011-09-28 11:55:51 +0300 | [diff] [blame] | 817 | if (unlikely(ret)) { |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 818 | EXOFS_ERR("write_cache_pages => %d\n", ret); |
| 819 | return ret; |
| 820 | } |
| 821 | |
Boaz Harrosh | b916c5c | 2011-09-28 11:55:51 +0300 | [diff] [blame] | 822 | ret = write_exec(&pcol); |
| 823 | if (unlikely(ret)) |
| 824 | return ret; |
| 825 | |
| 826 | if (wbc->sync_mode == WB_SYNC_ALL) { |
| 827 | return write_exec(&pcol); /* pump the last reminder */ |
| 828 | } else if (pcol.nr_pages) { |
| 829 | /* not SYNC let the reminder join the next writeout */ |
| 830 | unsigned i; |
| 831 | |
| 832 | for (i = 0; i < pcol.nr_pages; i++) { |
| 833 | struct page *page = pcol.pages[i]; |
| 834 | |
| 835 | end_page_writeback(page); |
| 836 | set_page_dirty(page); |
| 837 | unlock_page(page); |
| 838 | } |
| 839 | } |
| 840 | return 0; |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 841 | } |
| 842 | |
Boaz Harrosh | dd29661 | 2011-10-12 15:42:07 +0200 | [diff] [blame] | 843 | /* |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 844 | static int exofs_writepage(struct page *page, struct writeback_control *wbc) |
| 845 | { |
| 846 | struct page_collect pcol; |
| 847 | int ret; |
| 848 | |
| 849 | _pcol_init(&pcol, 1, page->mapping->host); |
| 850 | |
| 851 | ret = writepage_strip(page, NULL, &pcol); |
| 852 | if (ret) { |
| 853 | EXOFS_ERR("exofs_writepage => %d\n", ret); |
| 854 | return ret; |
| 855 | } |
| 856 | |
| 857 | return write_exec(&pcol); |
| 858 | } |
Boaz Harrosh | dd29661 | 2011-10-12 15:42:07 +0200 | [diff] [blame] | 859 | */ |
Boaz Harrosh | 2f246fd | 2010-06-09 18:23:18 +0300 | [diff] [blame] | 860 | /* i_mutex held using inode->i_size directly */ |
| 861 | static void _write_failed(struct inode *inode, loff_t to) |
| 862 | { |
| 863 | if (to > inode->i_size) |
Kirill A. Shutemov | 7caef26 | 2013-09-12 15:13:56 -0700 | [diff] [blame] | 864 | truncate_pagecache(inode, inode->i_size); |
Boaz Harrosh | 2f246fd | 2010-06-09 18:23:18 +0300 | [diff] [blame] | 865 | } |
| 866 | |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 867 | int exofs_write_begin(struct file *file, struct address_space *mapping, |
| 868 | loff_t pos, unsigned len, unsigned flags, |
| 869 | struct page **pagep, void **fsdata) |
| 870 | { |
| 871 | int ret = 0; |
| 872 | struct page *page; |
| 873 | |
| 874 | page = *pagep; |
| 875 | if (page == NULL) { |
| 876 | ret = simple_write_begin(file, mapping, pos, len, flags, pagep, |
| 877 | fsdata); |
| 878 | if (ret) { |
Joe Perches | 571f7f4 | 2010-10-21 22:17:17 -0700 | [diff] [blame] | 879 | EXOFS_DBGMSG("simple_write_begin failed\n"); |
Boaz Harrosh | 2f246fd | 2010-06-09 18:23:18 +0300 | [diff] [blame] | 880 | goto out; |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 881 | } |
| 882 | |
| 883 | page = *pagep; |
| 884 | } |
| 885 | |
| 886 | /* read modify write */ |
| 887 | if (!PageUptodate(page) && (len != PAGE_CACHE_SIZE)) { |
Boaz Harrosh | a8f1418 | 2010-11-22 18:02:45 +0200 | [diff] [blame] | 888 | loff_t i_size = i_size_read(mapping->host); |
| 889 | pgoff_t end_index = i_size >> PAGE_CACHE_SHIFT; |
| 890 | size_t rlen; |
| 891 | |
| 892 | if (page->index < end_index) |
| 893 | rlen = PAGE_CACHE_SIZE; |
| 894 | else if (page->index == end_index) |
| 895 | rlen = i_size & ~PAGE_CACHE_MASK; |
| 896 | else |
| 897 | rlen = 0; |
| 898 | |
| 899 | if (!rlen) { |
| 900 | clear_highpage(page); |
| 901 | SetPageUptodate(page); |
| 902 | goto out; |
| 903 | } |
| 904 | |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 905 | ret = _readpage(page, true); |
| 906 | if (ret) { |
| 907 | /*SetPageError was done by _readpage. Is it ok?*/ |
| 908 | unlock_page(page); |
Boaz Harrosh | a8f1418 | 2010-11-22 18:02:45 +0200 | [diff] [blame] | 909 | EXOFS_DBGMSG("__readpage failed\n"); |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 910 | } |
| 911 | } |
Boaz Harrosh | 2f246fd | 2010-06-09 18:23:18 +0300 | [diff] [blame] | 912 | out: |
| 913 | if (unlikely(ret)) |
| 914 | _write_failed(mapping->host, pos + len); |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 915 | |
| 916 | return ret; |
| 917 | } |
| 918 | |
| 919 | static int exofs_write_begin_export(struct file *file, |
| 920 | struct address_space *mapping, |
| 921 | loff_t pos, unsigned len, unsigned flags, |
| 922 | struct page **pagep, void **fsdata) |
| 923 | { |
| 924 | *pagep = NULL; |
| 925 | |
| 926 | return exofs_write_begin(file, mapping, pos, len, flags, pagep, |
| 927 | fsdata); |
| 928 | } |
| 929 | |
Boaz Harrosh | efd124b | 2009-12-27 17:01:42 +0200 | [diff] [blame] | 930 | static int exofs_write_end(struct file *file, struct address_space *mapping, |
| 931 | loff_t pos, unsigned len, unsigned copied, |
| 932 | struct page *page, void *fsdata) |
| 933 | { |
| 934 | struct inode *inode = mapping->host; |
| 935 | /* According to comment in simple_write_end i_mutex is held */ |
| 936 | loff_t i_size = inode->i_size; |
| 937 | int ret; |
| 938 | |
| 939 | ret = simple_write_end(file, mapping,pos, len, copied, page, fsdata); |
Boaz Harrosh | 2f246fd | 2010-06-09 18:23:18 +0300 | [diff] [blame] | 940 | if (unlikely(ret)) |
| 941 | _write_failed(inode, pos + len); |
| 942 | |
| 943 | /* TODO: once simple_write_end marks inode dirty remove */ |
Boaz Harrosh | efd124b | 2009-12-27 17:01:42 +0200 | [diff] [blame] | 944 | if (i_size != inode->i_size) |
| 945 | mark_inode_dirty(inode); |
| 946 | return ret; |
| 947 | } |
| 948 | |
Boaz Harrosh | 200b0700 | 2010-03-22 11:23:40 +0200 | [diff] [blame] | 949 | static int exofs_releasepage(struct page *page, gfp_t gfp) |
| 950 | { |
| 951 | EXOFS_DBGMSG("page 0x%lx\n", page->index); |
| 952 | WARN_ON(1); |
Boaz Harrosh | 85dc787 | 2010-05-31 18:55:43 +0300 | [diff] [blame] | 953 | return 0; |
Boaz Harrosh | 200b0700 | 2010-03-22 11:23:40 +0200 | [diff] [blame] | 954 | } |
| 955 | |
Lukas Czerner | d47992f | 2013-05-21 23:17:23 -0400 | [diff] [blame] | 956 | static void exofs_invalidatepage(struct page *page, unsigned int offset, |
| 957 | unsigned int length) |
Boaz Harrosh | 200b0700 | 2010-03-22 11:23:40 +0200 | [diff] [blame] | 958 | { |
Lukas Czerner | d47992f | 2013-05-21 23:17:23 -0400 | [diff] [blame] | 959 | EXOFS_DBGMSG("page 0x%lx offset 0x%x length 0x%x\n", |
| 960 | page->index, offset, length); |
Boaz Harrosh | 200b0700 | 2010-03-22 11:23:40 +0200 | [diff] [blame] | 961 | WARN_ON(1); |
Boaz Harrosh | 200b0700 | 2010-03-22 11:23:40 +0200 | [diff] [blame] | 962 | } |
| 963 | |
Boaz Harrosh | d83c7eb | 2014-01-13 23:45:43 +0200 | [diff] [blame] | 964 | |
| 965 | /* TODO: Should be easy enough to do proprly */ |
Omar Sandoval | 22c6186 | 2015-03-16 04:33:53 -0700 | [diff] [blame^] | 966 | static ssize_t exofs_direct_IO(struct kiocb *iocb, struct iov_iter *iter, |
| 967 | loff_t offset) |
Boaz Harrosh | d83c7eb | 2014-01-13 23:45:43 +0200 | [diff] [blame] | 968 | { |
| 969 | return 0; |
| 970 | } |
| 971 | |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 972 | const struct address_space_operations exofs_aops = { |
| 973 | .readpage = exofs_readpage, |
| 974 | .readpages = exofs_readpages, |
Boaz Harrosh | dd29661 | 2011-10-12 15:42:07 +0200 | [diff] [blame] | 975 | .writepage = NULL, |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 976 | .writepages = exofs_writepages, |
| 977 | .write_begin = exofs_write_begin_export, |
Boaz Harrosh | efd124b | 2009-12-27 17:01:42 +0200 | [diff] [blame] | 978 | .write_end = exofs_write_end, |
Boaz Harrosh | 200b0700 | 2010-03-22 11:23:40 +0200 | [diff] [blame] | 979 | .releasepage = exofs_releasepage, |
| 980 | .set_page_dirty = __set_page_dirty_nobuffers, |
| 981 | .invalidatepage = exofs_invalidatepage, |
| 982 | |
| 983 | /* Not implemented Yet */ |
| 984 | .bmap = NULL, /* TODO: use osd's OSD_ACT_READ_MAP */ |
Boaz Harrosh | d83c7eb | 2014-01-13 23:45:43 +0200 | [diff] [blame] | 985 | .direct_IO = exofs_direct_IO, |
Boaz Harrosh | 200b0700 | 2010-03-22 11:23:40 +0200 | [diff] [blame] | 986 | |
| 987 | /* With these NULL has special meaning or default is not exported */ |
Boaz Harrosh | 200b0700 | 2010-03-22 11:23:40 +0200 | [diff] [blame] | 988 | .migratepage = NULL, |
| 989 | .launder_page = NULL, |
| 990 | .is_partially_uptodate = NULL, |
| 991 | .error_remove_page = NULL, |
Boaz Harrosh | beaec07 | 2008-10-27 19:31:34 +0200 | [diff] [blame] | 992 | }; |
| 993 | |
Boaz Harrosh | e806271 | 2008-10-27 18:37:02 +0200 | [diff] [blame] | 994 | /****************************************************************************** |
| 995 | * INODE OPERATIONS |
| 996 | *****************************************************************************/ |
| 997 | |
| 998 | /* |
| 999 | * Test whether an inode is a fast symlink. |
| 1000 | */ |
| 1001 | static inline int exofs_inode_is_fast_symlink(struct inode *inode) |
| 1002 | { |
| 1003 | struct exofs_i_info *oi = exofs_i(inode); |
| 1004 | |
| 1005 | return S_ISLNK(inode->i_mode) && (oi->i_data[0] != 0); |
| 1006 | } |
| 1007 | |
Boaz Harrosh | 2f246fd | 2010-06-09 18:23:18 +0300 | [diff] [blame] | 1008 | static int _do_truncate(struct inode *inode, loff_t newsize) |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 1009 | { |
| 1010 | struct exofs_i_info *oi = exofs_i(inode); |
Boaz Harrosh | 9e9db45 | 2011-08-05 15:06:04 -0700 | [diff] [blame] | 1011 | struct exofs_sb_info *sbi = inode->i_sb->s_fs_info; |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 1012 | int ret; |
| 1013 | |
| 1014 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
| 1015 | |
Boaz Harrosh | 5bf696d | 2011-09-28 11:39:59 +0300 | [diff] [blame] | 1016 | ret = ore_truncate(&sbi->layout, &oi->oc, (u64)newsize); |
Boaz Harrosh | 2f246fd | 2010-06-09 18:23:18 +0300 | [diff] [blame] | 1017 | if (likely(!ret)) |
| 1018 | truncate_setsize(inode, newsize); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 1019 | |
Boaz Harrosh | 19350e7 | 2014-01-14 16:26:13 +0200 | [diff] [blame] | 1020 | EXOFS_DBGMSG2("(0x%lx) size=0x%llx ret=>%d\n", |
Boaz Harrosh | 2f246fd | 2010-06-09 18:23:18 +0300 | [diff] [blame] | 1021 | inode->i_ino, newsize, ret); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 1022 | return ret; |
| 1023 | } |
| 1024 | |
Boaz Harrosh | e806271 | 2008-10-27 18:37:02 +0200 | [diff] [blame] | 1025 | /* |
Boaz Harrosh | 2f246fd | 2010-06-09 18:23:18 +0300 | [diff] [blame] | 1026 | * Set inode attributes - update size attribute on OSD if needed, |
| 1027 | * otherwise just call generic functions. |
Boaz Harrosh | e806271 | 2008-10-27 18:37:02 +0200 | [diff] [blame] | 1028 | */ |
| 1029 | int exofs_setattr(struct dentry *dentry, struct iattr *iattr) |
| 1030 | { |
| 1031 | struct inode *inode = dentry->d_inode; |
| 1032 | int error; |
| 1033 | |
Boaz Harrosh | 2f246fd | 2010-06-09 18:23:18 +0300 | [diff] [blame] | 1034 | /* if we are about to modify an object, and it hasn't been |
| 1035 | * created yet, wait |
| 1036 | */ |
| 1037 | error = wait_obj_created(exofs_i(inode)); |
| 1038 | if (unlikely(error)) |
| 1039 | return error; |
| 1040 | |
Boaz Harrosh | e806271 | 2008-10-27 18:37:02 +0200 | [diff] [blame] | 1041 | error = inode_change_ok(inode, iattr); |
Boaz Harrosh | 2f246fd | 2010-06-09 18:23:18 +0300 | [diff] [blame] | 1042 | if (unlikely(error)) |
Boaz Harrosh | e806271 | 2008-10-27 18:37:02 +0200 | [diff] [blame] | 1043 | return error; |
| 1044 | |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 1045 | if ((iattr->ia_valid & ATTR_SIZE) && |
| 1046 | iattr->ia_size != i_size_read(inode)) { |
Boaz Harrosh | 2f246fd | 2010-06-09 18:23:18 +0300 | [diff] [blame] | 1047 | error = _do_truncate(inode, iattr->ia_size); |
| 1048 | if (unlikely(error)) |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 1049 | return error; |
| 1050 | } |
| 1051 | |
| 1052 | setattr_copy(inode, iattr); |
| 1053 | mark_inode_dirty(inode); |
| 1054 | return 0; |
Boaz Harrosh | e806271 | 2008-10-27 18:37:02 +0200 | [diff] [blame] | 1055 | } |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1056 | |
Boaz Harrosh | d9c740d | 2010-01-28 11:58:08 +0200 | [diff] [blame] | 1057 | static const struct osd_attr g_attr_inode_file_layout = ATTR_DEF( |
| 1058 | EXOFS_APAGE_FS_DATA, |
| 1059 | EXOFS_ATTR_INODE_FILE_LAYOUT, |
| 1060 | 0); |
| 1061 | static const struct osd_attr g_attr_inode_dir_layout = ATTR_DEF( |
| 1062 | EXOFS_APAGE_FS_DATA, |
| 1063 | EXOFS_ATTR_INODE_DIR_LAYOUT, |
| 1064 | 0); |
| 1065 | |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1066 | /* |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 1067 | * Read the Linux inode info from the OSD, and return it as is. In exofs the |
| 1068 | * inode info is in an application specific page/attribute of the osd-object. |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1069 | */ |
| 1070 | static int exofs_get_inode(struct super_block *sb, struct exofs_i_info *oi, |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 1071 | struct exofs_fcb *inode) |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1072 | { |
| 1073 | struct exofs_sb_info *sbi = sb->s_fs_info; |
Boaz Harrosh | d9c740d | 2010-01-28 11:58:08 +0200 | [diff] [blame] | 1074 | struct osd_attr attrs[] = { |
| 1075 | [0] = g_attr_inode_data, |
| 1076 | [1] = g_attr_inode_file_layout, |
| 1077 | [2] = g_attr_inode_dir_layout, |
Boaz Harrosh | d9c740d | 2010-01-28 11:58:08 +0200 | [diff] [blame] | 1078 | }; |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 1079 | struct ore_io_state *ios; |
Boaz Harrosh | d9c740d | 2010-01-28 11:58:08 +0200 | [diff] [blame] | 1080 | struct exofs_on_disk_inode_layout *layout; |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1081 | int ret; |
| 1082 | |
Boaz Harrosh | 5bf696d | 2011-09-28 11:39:59 +0300 | [diff] [blame] | 1083 | ret = ore_get_io_state(&sbi->layout, &oi->oc, &ios); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 1084 | if (unlikely(ret)) { |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 1085 | EXOFS_ERR("%s: ore_get_io_state failed.\n", __func__); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 1086 | return ret; |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1087 | } |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1088 | |
Boaz Harrosh | 5bf696d | 2011-09-28 11:39:59 +0300 | [diff] [blame] | 1089 | attrs[1].len = exofs_on_disk_inode_layout_size(sbi->oc.numdevs); |
| 1090 | attrs[2].len = exofs_on_disk_inode_layout_size(sbi->oc.numdevs); |
Boaz Harrosh | d9c740d | 2010-01-28 11:58:08 +0200 | [diff] [blame] | 1091 | |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 1092 | ios->in_attr = attrs; |
| 1093 | ios->in_attr_len = ARRAY_SIZE(attrs); |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1094 | |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 1095 | ret = ore_read(ios); |
Boaz Harrosh | 96391e2 | 2010-02-09 11:43:21 +0200 | [diff] [blame] | 1096 | if (unlikely(ret)) { |
| 1097 | EXOFS_ERR("object(0x%llx) corrupted, return empty file=>%d\n", |
Boaz Harrosh | 9e9db45 | 2011-08-05 15:06:04 -0700 | [diff] [blame] | 1098 | _LLU(oi->one_comp.obj.id), ret); |
Boaz Harrosh | 96391e2 | 2010-02-09 11:43:21 +0200 | [diff] [blame] | 1099 | memset(inode, 0, sizeof(*inode)); |
| 1100 | inode->i_mode = 0040000 | (0777 & ~022); |
| 1101 | /* If object is lost on target we might as well enable it's |
| 1102 | * delete. |
| 1103 | */ |
Boaz Harrosh | c8592fc | 2014-01-14 16:05:52 +0200 | [diff] [blame] | 1104 | ret = 0; |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1105 | goto out; |
Boaz Harrosh | 96391e2 | 2010-02-09 11:43:21 +0200 | [diff] [blame] | 1106 | } |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1107 | |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 1108 | ret = extract_attr_from_ios(ios, &attrs[0]); |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1109 | if (ret) { |
Boaz Harrosh | 19350e7 | 2014-01-14 16:26:13 +0200 | [diff] [blame] | 1110 | EXOFS_ERR("%s: extract_attr 0 of inode failed\n", __func__); |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1111 | goto out; |
| 1112 | } |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 1113 | WARN_ON(attrs[0].len != EXOFS_INO_ATTR_SIZE); |
| 1114 | memcpy(inode, attrs[0].val_ptr, EXOFS_INO_ATTR_SIZE); |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1115 | |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 1116 | ret = extract_attr_from_ios(ios, &attrs[1]); |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1117 | if (ret) { |
Boaz Harrosh | 19350e7 | 2014-01-14 16:26:13 +0200 | [diff] [blame] | 1118 | EXOFS_ERR("%s: extract_attr 1 of inode failed\n", __func__); |
Boaz Harrosh | d9c740d | 2010-01-28 11:58:08 +0200 | [diff] [blame] | 1119 | goto out; |
| 1120 | } |
| 1121 | if (attrs[1].len) { |
| 1122 | layout = attrs[1].val_ptr; |
| 1123 | if (layout->gen_func != cpu_to_le16(LAYOUT_MOVING_WINDOW)) { |
| 1124 | EXOFS_ERR("%s: unsupported files layout %d\n", |
| 1125 | __func__, layout->gen_func); |
| 1126 | ret = -ENOTSUPP; |
| 1127 | goto out; |
| 1128 | } |
| 1129 | } |
| 1130 | |
| 1131 | ret = extract_attr_from_ios(ios, &attrs[2]); |
| 1132 | if (ret) { |
Boaz Harrosh | 19350e7 | 2014-01-14 16:26:13 +0200 | [diff] [blame] | 1133 | EXOFS_ERR("%s: extract_attr 2 of inode failed\n", __func__); |
Boaz Harrosh | d9c740d | 2010-01-28 11:58:08 +0200 | [diff] [blame] | 1134 | goto out; |
| 1135 | } |
| 1136 | if (attrs[2].len) { |
| 1137 | layout = attrs[2].val_ptr; |
| 1138 | if (layout->gen_func != cpu_to_le16(LAYOUT_MOVING_WINDOW)) { |
| 1139 | EXOFS_ERR("%s: unsupported meta-data layout %d\n", |
| 1140 | __func__, layout->gen_func); |
| 1141 | ret = -ENOTSUPP; |
| 1142 | goto out; |
| 1143 | } |
| 1144 | } |
| 1145 | |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1146 | out: |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 1147 | ore_put_io_state(ios); |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1148 | return ret; |
| 1149 | } |
| 1150 | |
Boaz Harrosh | 9cfdc7a | 2009-08-04 20:40:29 +0300 | [diff] [blame] | 1151 | static void __oi_init(struct exofs_i_info *oi) |
| 1152 | { |
| 1153 | init_waitqueue_head(&oi->i_wq); |
| 1154 | oi->i_flags = 0; |
| 1155 | } |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1156 | /* |
| 1157 | * Fill in an inode read from the OSD and set it up for use |
| 1158 | */ |
| 1159 | struct inode *exofs_iget(struct super_block *sb, unsigned long ino) |
| 1160 | { |
| 1161 | struct exofs_i_info *oi; |
| 1162 | struct exofs_fcb fcb; |
| 1163 | struct inode *inode; |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1164 | int ret; |
| 1165 | |
| 1166 | inode = iget_locked(sb, ino); |
| 1167 | if (!inode) |
| 1168 | return ERR_PTR(-ENOMEM); |
| 1169 | if (!(inode->i_state & I_NEW)) |
| 1170 | return inode; |
| 1171 | oi = exofs_i(inode); |
Boaz Harrosh | 9cfdc7a | 2009-08-04 20:40:29 +0300 | [diff] [blame] | 1172 | __oi_init(oi); |
Boaz Harrosh | 5bf696d | 2011-09-28 11:39:59 +0300 | [diff] [blame] | 1173 | exofs_init_comps(&oi->oc, &oi->one_comp, sb->s_fs_info, |
Boaz Harrosh | 9e9db45 | 2011-08-05 15:06:04 -0700 | [diff] [blame] | 1174 | exofs_oi_objno(oi)); |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1175 | |
| 1176 | /* read the inode from the osd */ |
Boaz Harrosh | 5d952b8 | 2010-02-01 13:35:51 +0200 | [diff] [blame] | 1177 | ret = exofs_get_inode(sb, oi, &fcb); |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1178 | if (ret) |
| 1179 | goto bad_inode; |
| 1180 | |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1181 | set_obj_created(oi); |
| 1182 | |
| 1183 | /* copy stuff from on-disk struct to in-memory struct */ |
| 1184 | inode->i_mode = le16_to_cpu(fcb.i_mode); |
Eric W. Biederman | d001b05 | 2012-02-10 11:11:19 -0800 | [diff] [blame] | 1185 | i_uid_write(inode, le32_to_cpu(fcb.i_uid)); |
| 1186 | i_gid_write(inode, le32_to_cpu(fcb.i_gid)); |
Miklos Szeredi | bfe8684 | 2011-10-28 14:13:29 +0200 | [diff] [blame] | 1187 | set_nlink(inode, le16_to_cpu(fcb.i_links_count)); |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1188 | inode->i_ctime.tv_sec = (signed)le32_to_cpu(fcb.i_ctime); |
| 1189 | inode->i_atime.tv_sec = (signed)le32_to_cpu(fcb.i_atime); |
| 1190 | inode->i_mtime.tv_sec = (signed)le32_to_cpu(fcb.i_mtime); |
| 1191 | inode->i_ctime.tv_nsec = |
| 1192 | inode->i_atime.tv_nsec = inode->i_mtime.tv_nsec = 0; |
| 1193 | oi->i_commit_size = le64_to_cpu(fcb.i_size); |
| 1194 | i_size_write(inode, oi->i_commit_size); |
| 1195 | inode->i_blkbits = EXOFS_BLKSHIFT; |
| 1196 | inode->i_generation = le32_to_cpu(fcb.i_generation); |
| 1197 | |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1198 | oi->i_dir_start_lookup = 0; |
| 1199 | |
| 1200 | if ((inode->i_nlink == 0) && (inode->i_mode == 0)) { |
| 1201 | ret = -ESTALE; |
| 1202 | goto bad_inode; |
| 1203 | } |
| 1204 | |
| 1205 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
| 1206 | if (fcb.i_data[0]) |
| 1207 | inode->i_rdev = |
| 1208 | old_decode_dev(le32_to_cpu(fcb.i_data[0])); |
| 1209 | else |
| 1210 | inode->i_rdev = |
| 1211 | new_decode_dev(le32_to_cpu(fcb.i_data[1])); |
| 1212 | } else { |
| 1213 | memcpy(oi->i_data, fcb.i_data, sizeof(fcb.i_data)); |
| 1214 | } |
| 1215 | |
| 1216 | if (S_ISREG(inode->i_mode)) { |
| 1217 | inode->i_op = &exofs_file_inode_operations; |
| 1218 | inode->i_fop = &exofs_file_operations; |
| 1219 | inode->i_mapping->a_ops = &exofs_aops; |
| 1220 | } else if (S_ISDIR(inode->i_mode)) { |
| 1221 | inode->i_op = &exofs_dir_inode_operations; |
| 1222 | inode->i_fop = &exofs_dir_operations; |
| 1223 | inode->i_mapping->a_ops = &exofs_aops; |
| 1224 | } else if (S_ISLNK(inode->i_mode)) { |
| 1225 | if (exofs_inode_is_fast_symlink(inode)) |
| 1226 | inode->i_op = &exofs_fast_symlink_inode_operations; |
| 1227 | else { |
| 1228 | inode->i_op = &exofs_symlink_inode_operations; |
| 1229 | inode->i_mapping->a_ops = &exofs_aops; |
| 1230 | } |
| 1231 | } else { |
| 1232 | inode->i_op = &exofs_special_inode_operations; |
| 1233 | if (fcb.i_data[0]) |
| 1234 | init_special_inode(inode, inode->i_mode, |
| 1235 | old_decode_dev(le32_to_cpu(fcb.i_data[0]))); |
| 1236 | else |
| 1237 | init_special_inode(inode, inode->i_mode, |
| 1238 | new_decode_dev(le32_to_cpu(fcb.i_data[1]))); |
| 1239 | } |
| 1240 | |
| 1241 | unlock_new_inode(inode); |
| 1242 | return inode; |
| 1243 | |
| 1244 | bad_inode: |
| 1245 | iget_failed(inode); |
| 1246 | return ERR_PTR(ret); |
| 1247 | } |
| 1248 | |
| 1249 | int __exofs_wait_obj_created(struct exofs_i_info *oi) |
| 1250 | { |
| 1251 | if (!obj_created(oi)) { |
Boaz Harrosh | fe2fd9e | 2010-10-16 19:14:01 +1100 | [diff] [blame] | 1252 | EXOFS_DBGMSG("!obj_created\n"); |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1253 | BUG_ON(!obj_2bcreated(oi)); |
| 1254 | wait_event(oi->i_wq, obj_created(oi)); |
Boaz Harrosh | fe2fd9e | 2010-10-16 19:14:01 +1100 | [diff] [blame] | 1255 | EXOFS_DBGMSG("wait_event done\n"); |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1256 | } |
| 1257 | return unlikely(is_bad_inode(&oi->vfs_inode)) ? -EIO : 0; |
| 1258 | } |
Boaz Harrosh | 1cea312 | 2011-02-03 17:53:25 +0200 | [diff] [blame] | 1259 | |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1260 | /* |
| 1261 | * Callback function from exofs_new_inode(). The important thing is that we |
| 1262 | * set the obj_created flag so that other methods know that the object exists on |
| 1263 | * the OSD. |
| 1264 | */ |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 1265 | static void create_done(struct ore_io_state *ios, void *p) |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1266 | { |
| 1267 | struct inode *inode = p; |
| 1268 | struct exofs_i_info *oi = exofs_i(inode); |
| 1269 | struct exofs_sb_info *sbi = inode->i_sb->s_fs_info; |
| 1270 | int ret; |
| 1271 | |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 1272 | ret = ore_check_io(ios, NULL); |
| 1273 | ore_put_io_state(ios); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 1274 | |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1275 | atomic_dec(&sbi->s_curr_pending); |
| 1276 | |
| 1277 | if (unlikely(ret)) { |
Joe Perches | 571f7f4 | 2010-10-21 22:17:17 -0700 | [diff] [blame] | 1278 | EXOFS_ERR("object=0x%llx creation failed in pid=0x%llx", |
Boaz Harrosh | 9e9db45 | 2011-08-05 15:06:04 -0700 | [diff] [blame] | 1279 | _LLU(exofs_oi_objno(oi)), |
| 1280 | _LLU(oi->one_comp.obj.partition)); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 1281 | /*TODO: When FS is corrupted creation can fail, object already |
| 1282 | * exist. Get rid of this asynchronous creation, if exist |
| 1283 | * increment the obj counter and try the next object. Until we |
| 1284 | * succeed. All these dangling objects will be made into lost |
| 1285 | * files by chkfs.exofs |
| 1286 | */ |
| 1287 | } |
| 1288 | |
| 1289 | set_obj_created(oi); |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1290 | |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1291 | wake_up(&oi->i_wq); |
| 1292 | } |
| 1293 | |
| 1294 | /* |
| 1295 | * Set up a new inode and create an object for it on the OSD |
| 1296 | */ |
Al Viro | bef41c2 | 2011-07-26 03:07:49 -0400 | [diff] [blame] | 1297 | struct inode *exofs_new_inode(struct inode *dir, umode_t mode) |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1298 | { |
Boaz Harrosh | 9e9db45 | 2011-08-05 15:06:04 -0700 | [diff] [blame] | 1299 | struct super_block *sb = dir->i_sb; |
| 1300 | struct exofs_sb_info *sbi = sb->s_fs_info; |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1301 | struct inode *inode; |
| 1302 | struct exofs_i_info *oi; |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 1303 | struct ore_io_state *ios; |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1304 | int ret; |
| 1305 | |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1306 | inode = new_inode(sb); |
| 1307 | if (!inode) |
| 1308 | return ERR_PTR(-ENOMEM); |
| 1309 | |
| 1310 | oi = exofs_i(inode); |
Boaz Harrosh | 9cfdc7a | 2009-08-04 20:40:29 +0300 | [diff] [blame] | 1311 | __oi_init(oi); |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1312 | |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1313 | set_obj_2bcreated(oi); |
| 1314 | |
Dmitry Monakhov | e00117f | 2010-03-04 17:31:48 +0300 | [diff] [blame] | 1315 | inode_init_owner(inode, dir, mode); |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1316 | inode->i_ino = sbi->s_nextid++; |
| 1317 | inode->i_blkbits = EXOFS_BLKSHIFT; |
| 1318 | inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; |
| 1319 | oi->i_commit_size = inode->i_size = 0; |
| 1320 | spin_lock(&sbi->s_next_gen_lock); |
| 1321 | inode->i_generation = sbi->s_next_generation++; |
| 1322 | spin_unlock(&sbi->s_next_gen_lock); |
| 1323 | insert_inode_hash(inode); |
| 1324 | |
Boaz Harrosh | 5bf696d | 2011-09-28 11:39:59 +0300 | [diff] [blame] | 1325 | exofs_init_comps(&oi->oc, &oi->one_comp, sb->s_fs_info, |
Boaz Harrosh | 9e9db45 | 2011-08-05 15:06:04 -0700 | [diff] [blame] | 1326 | exofs_oi_objno(oi)); |
Boaz Harrosh | 1cea312 | 2011-02-03 17:53:25 +0200 | [diff] [blame] | 1327 | exofs_sbi_write_stats(sbi); /* Make sure new sbi->s_nextid is on disk */ |
| 1328 | |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1329 | mark_inode_dirty(inode); |
| 1330 | |
Boaz Harrosh | 5bf696d | 2011-09-28 11:39:59 +0300 | [diff] [blame] | 1331 | ret = ore_get_io_state(&sbi->layout, &oi->oc, &ios); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 1332 | if (unlikely(ret)) { |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 1333 | EXOFS_ERR("exofs_new_inode: ore_get_io_state failed\n"); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 1334 | return ERR_PTR(ret); |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1335 | } |
| 1336 | |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 1337 | ios->done = create_done; |
| 1338 | ios->private = inode; |
Boaz Harrosh | 9e9db45 | 2011-08-05 15:06:04 -0700 | [diff] [blame] | 1339 | |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 1340 | ret = ore_create(ios); |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1341 | if (ret) { |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 1342 | ore_put_io_state(ios); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 1343 | return ERR_PTR(ret); |
Boaz Harrosh | e6af00f | 2008-10-28 15:38:12 +0200 | [diff] [blame] | 1344 | } |
| 1345 | atomic_inc(&sbi->s_curr_pending); |
| 1346 | |
| 1347 | return inode; |
| 1348 | } |
Boaz Harrosh | ba9e5e9 | 2008-10-28 16:11:41 +0200 | [diff] [blame] | 1349 | |
| 1350 | /* |
| 1351 | * struct to pass two arguments to update_inode's callback |
| 1352 | */ |
| 1353 | struct updatei_args { |
| 1354 | struct exofs_sb_info *sbi; |
| 1355 | struct exofs_fcb fcb; |
| 1356 | }; |
| 1357 | |
| 1358 | /* |
| 1359 | * Callback function from exofs_update_inode(). |
| 1360 | */ |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 1361 | static void updatei_done(struct ore_io_state *ios, void *p) |
Boaz Harrosh | ba9e5e9 | 2008-10-28 16:11:41 +0200 | [diff] [blame] | 1362 | { |
| 1363 | struct updatei_args *args = p; |
| 1364 | |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 1365 | ore_put_io_state(ios); |
Boaz Harrosh | ba9e5e9 | 2008-10-28 16:11:41 +0200 | [diff] [blame] | 1366 | |
| 1367 | atomic_dec(&args->sbi->s_curr_pending); |
| 1368 | |
| 1369 | kfree(args); |
| 1370 | } |
| 1371 | |
| 1372 | /* |
| 1373 | * Write the inode to the OSD. Just fill up the struct, and set the attribute |
| 1374 | * synchronously or asynchronously depending on the do_sync flag. |
| 1375 | */ |
| 1376 | static int exofs_update_inode(struct inode *inode, int do_sync) |
| 1377 | { |
| 1378 | struct exofs_i_info *oi = exofs_i(inode); |
| 1379 | struct super_block *sb = inode->i_sb; |
| 1380 | struct exofs_sb_info *sbi = sb->s_fs_info; |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 1381 | struct ore_io_state *ios; |
Boaz Harrosh | ba9e5e9 | 2008-10-28 16:11:41 +0200 | [diff] [blame] | 1382 | struct osd_attr attr; |
| 1383 | struct exofs_fcb *fcb; |
| 1384 | struct updatei_args *args; |
| 1385 | int ret; |
| 1386 | |
| 1387 | args = kzalloc(sizeof(*args), GFP_KERNEL); |
Boaz Harrosh | 34ce4e7c | 2009-12-15 19:34:17 +0200 | [diff] [blame] | 1388 | if (!args) { |
Joe Perches | 571f7f4 | 2010-10-21 22:17:17 -0700 | [diff] [blame] | 1389 | EXOFS_DBGMSG("Failed kzalloc of args\n"); |
Boaz Harrosh | ba9e5e9 | 2008-10-28 16:11:41 +0200 | [diff] [blame] | 1390 | return -ENOMEM; |
Boaz Harrosh | 34ce4e7c | 2009-12-15 19:34:17 +0200 | [diff] [blame] | 1391 | } |
Boaz Harrosh | ba9e5e9 | 2008-10-28 16:11:41 +0200 | [diff] [blame] | 1392 | |
| 1393 | fcb = &args->fcb; |
| 1394 | |
| 1395 | fcb->i_mode = cpu_to_le16(inode->i_mode); |
Eric W. Biederman | d001b05 | 2012-02-10 11:11:19 -0800 | [diff] [blame] | 1396 | fcb->i_uid = cpu_to_le32(i_uid_read(inode)); |
| 1397 | fcb->i_gid = cpu_to_le32(i_gid_read(inode)); |
Boaz Harrosh | ba9e5e9 | 2008-10-28 16:11:41 +0200 | [diff] [blame] | 1398 | fcb->i_links_count = cpu_to_le16(inode->i_nlink); |
| 1399 | fcb->i_ctime = cpu_to_le32(inode->i_ctime.tv_sec); |
| 1400 | fcb->i_atime = cpu_to_le32(inode->i_atime.tv_sec); |
| 1401 | fcb->i_mtime = cpu_to_le32(inode->i_mtime.tv_sec); |
| 1402 | oi->i_commit_size = i_size_read(inode); |
| 1403 | fcb->i_size = cpu_to_le64(oi->i_commit_size); |
| 1404 | fcb->i_generation = cpu_to_le32(inode->i_generation); |
| 1405 | |
| 1406 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
| 1407 | if (old_valid_dev(inode->i_rdev)) { |
| 1408 | fcb->i_data[0] = |
| 1409 | cpu_to_le32(old_encode_dev(inode->i_rdev)); |
| 1410 | fcb->i_data[1] = 0; |
| 1411 | } else { |
| 1412 | fcb->i_data[0] = 0; |
| 1413 | fcb->i_data[1] = |
| 1414 | cpu_to_le32(new_encode_dev(inode->i_rdev)); |
| 1415 | fcb->i_data[2] = 0; |
| 1416 | } |
| 1417 | } else |
| 1418 | memcpy(fcb->i_data, oi->i_data, sizeof(fcb->i_data)); |
| 1419 | |
Boaz Harrosh | 5bf696d | 2011-09-28 11:39:59 +0300 | [diff] [blame] | 1420 | ret = ore_get_io_state(&sbi->layout, &oi->oc, &ios); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 1421 | if (unlikely(ret)) { |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 1422 | EXOFS_ERR("%s: ore_get_io_state failed.\n", __func__); |
Boaz Harrosh | ba9e5e9 | 2008-10-28 16:11:41 +0200 | [diff] [blame] | 1423 | goto free_args; |
| 1424 | } |
| 1425 | |
Boaz Harrosh | ba9e5e9 | 2008-10-28 16:11:41 +0200 | [diff] [blame] | 1426 | attr = g_attr_inode_data; |
| 1427 | attr.val_ptr = fcb; |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 1428 | ios->out_attr_len = 1; |
| 1429 | ios->out_attr = &attr; |
Boaz Harrosh | ba9e5e9 | 2008-10-28 16:11:41 +0200 | [diff] [blame] | 1430 | |
Boaz Harrosh | fe2fd9e | 2010-10-16 19:14:01 +1100 | [diff] [blame] | 1431 | wait_obj_created(oi); |
Boaz Harrosh | ba9e5e9 | 2008-10-28 16:11:41 +0200 | [diff] [blame] | 1432 | |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 1433 | if (!do_sync) { |
Boaz Harrosh | ba9e5e9 | 2008-10-28 16:11:41 +0200 | [diff] [blame] | 1434 | args->sbi = sbi; |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 1435 | ios->done = updatei_done; |
| 1436 | ios->private = args; |
| 1437 | } |
Boaz Harrosh | ba9e5e9 | 2008-10-28 16:11:41 +0200 | [diff] [blame] | 1438 | |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 1439 | ret = ore_write(ios); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 1440 | if (!do_sync && !ret) { |
Boaz Harrosh | ba9e5e9 | 2008-10-28 16:11:41 +0200 | [diff] [blame] | 1441 | atomic_inc(&sbi->s_curr_pending); |
| 1442 | goto out; /* deallocation in updatei_done */ |
| 1443 | } |
| 1444 | |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 1445 | ore_put_io_state(ios); |
Boaz Harrosh | ba9e5e9 | 2008-10-28 16:11:41 +0200 | [diff] [blame] | 1446 | free_args: |
| 1447 | kfree(args); |
| 1448 | out: |
Boaz Harrosh | 34ce4e7c | 2009-12-15 19:34:17 +0200 | [diff] [blame] | 1449 | EXOFS_DBGMSG("(0x%lx) do_sync=%d ret=>%d\n", |
| 1450 | inode->i_ino, do_sync, ret); |
Boaz Harrosh | ba9e5e9 | 2008-10-28 16:11:41 +0200 | [diff] [blame] | 1451 | return ret; |
| 1452 | } |
| 1453 | |
Christoph Hellwig | a9185b4 | 2010-03-05 09:21:37 +0100 | [diff] [blame] | 1454 | int exofs_write_inode(struct inode *inode, struct writeback_control *wbc) |
Boaz Harrosh | ba9e5e9 | 2008-10-28 16:11:41 +0200 | [diff] [blame] | 1455 | { |
Nick Piggin | 97178b7 | 2010-11-25 12:47:15 +0200 | [diff] [blame] | 1456 | /* FIXME: fix fsync and use wbc->sync_mode == WB_SYNC_ALL */ |
| 1457 | return exofs_update_inode(inode, 1); |
Boaz Harrosh | ba9e5e9 | 2008-10-28 16:11:41 +0200 | [diff] [blame] | 1458 | } |
| 1459 | |
| 1460 | /* |
| 1461 | * Callback function from exofs_delete_inode() - don't have much cleaning up to |
| 1462 | * do. |
| 1463 | */ |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 1464 | static void delete_done(struct ore_io_state *ios, void *p) |
Boaz Harrosh | ba9e5e9 | 2008-10-28 16:11:41 +0200 | [diff] [blame] | 1465 | { |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 1466 | struct exofs_sb_info *sbi = p; |
| 1467 | |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 1468 | ore_put_io_state(ios); |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 1469 | |
Boaz Harrosh | ba9e5e9 | 2008-10-28 16:11:41 +0200 | [diff] [blame] | 1470 | atomic_dec(&sbi->s_curr_pending); |
| 1471 | } |
| 1472 | |
| 1473 | /* |
| 1474 | * Called when the refcount of an inode reaches zero. We remove the object |
| 1475 | * from the OSD here. We make sure the object was created before we try and |
| 1476 | * delete it. |
| 1477 | */ |
Al Viro | 4ec70c9 | 2010-06-07 11:42:26 -0400 | [diff] [blame] | 1478 | void exofs_evict_inode(struct inode *inode) |
Boaz Harrosh | ba9e5e9 | 2008-10-28 16:11:41 +0200 | [diff] [blame] | 1479 | { |
| 1480 | struct exofs_i_info *oi = exofs_i(inode); |
| 1481 | struct super_block *sb = inode->i_sb; |
| 1482 | struct exofs_sb_info *sbi = sb->s_fs_info; |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 1483 | struct ore_io_state *ios; |
Boaz Harrosh | ba9e5e9 | 2008-10-28 16:11:41 +0200 | [diff] [blame] | 1484 | int ret; |
| 1485 | |
Johannes Weiner | 91b0abe | 2014-04-03 14:47:49 -0700 | [diff] [blame] | 1486 | truncate_inode_pages_final(&inode->i_data); |
Boaz Harrosh | ba9e5e9 | 2008-10-28 16:11:41 +0200 | [diff] [blame] | 1487 | |
Boaz Harrosh | 2f246fd | 2010-06-09 18:23:18 +0300 | [diff] [blame] | 1488 | /* TODO: should do better here */ |
Al Viro | 4ec70c9 | 2010-06-07 11:42:26 -0400 | [diff] [blame] | 1489 | if (inode->i_nlink || is_bad_inode(inode)) |
Boaz Harrosh | ba9e5e9 | 2008-10-28 16:11:41 +0200 | [diff] [blame] | 1490 | goto no_delete; |
| 1491 | |
Boaz Harrosh | ba9e5e9 | 2008-10-28 16:11:41 +0200 | [diff] [blame] | 1492 | inode->i_size = 0; |
Jan Kara | dbd5768 | 2012-05-03 14:48:02 +0200 | [diff] [blame] | 1493 | clear_inode(inode); |
Boaz Harrosh | ba9e5e9 | 2008-10-28 16:11:41 +0200 | [diff] [blame] | 1494 | |
Boaz Harrosh | fe2fd9e | 2010-10-16 19:14:01 +1100 | [diff] [blame] | 1495 | /* if we are deleting an obj that hasn't been created yet, wait. |
| 1496 | * This also makes sure that create_done cannot be called with an |
| 1497 | * already evicted inode. |
| 1498 | */ |
| 1499 | wait_obj_created(oi); |
| 1500 | /* ignore the error, attempt a remove anyway */ |
Boaz Harrosh | 2f246fd | 2010-06-09 18:23:18 +0300 | [diff] [blame] | 1501 | |
| 1502 | /* Now Remove the OSD objects */ |
Boaz Harrosh | 5bf696d | 2011-09-28 11:39:59 +0300 | [diff] [blame] | 1503 | ret = ore_get_io_state(&sbi->layout, &oi->oc, &ios); |
Boaz Harrosh | 2f246fd | 2010-06-09 18:23:18 +0300 | [diff] [blame] | 1504 | if (unlikely(ret)) { |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 1505 | EXOFS_ERR("%s: ore_get_io_state failed\n", __func__); |
Boaz Harrosh | 2f246fd | 2010-06-09 18:23:18 +0300 | [diff] [blame] | 1506 | return; |
Boaz Harrosh | ba9e5e9 | 2008-10-28 16:11:41 +0200 | [diff] [blame] | 1507 | } |
| 1508 | |
Boaz Harrosh | 06886a5 | 2009-11-08 14:54:08 +0200 | [diff] [blame] | 1509 | ios->done = delete_done; |
| 1510 | ios->private = sbi; |
Boaz Harrosh | 9e9db45 | 2011-08-05 15:06:04 -0700 | [diff] [blame] | 1511 | |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 1512 | ret = ore_remove(ios); |
Boaz Harrosh | ba9e5e9 | 2008-10-28 16:11:41 +0200 | [diff] [blame] | 1513 | if (ret) { |
Boaz Harrosh | 8ff660a | 2011-08-06 19:26:31 -0700 | [diff] [blame] | 1514 | EXOFS_ERR("%s: ore_remove failed\n", __func__); |
| 1515 | ore_put_io_state(ios); |
Boaz Harrosh | ba9e5e9 | 2008-10-28 16:11:41 +0200 | [diff] [blame] | 1516 | return; |
| 1517 | } |
| 1518 | atomic_inc(&sbi->s_curr_pending); |
| 1519 | |
| 1520 | return; |
| 1521 | |
| 1522 | no_delete: |
Jan Kara | dbd5768 | 2012-05-03 14:48:02 +0200 | [diff] [blame] | 1523 | clear_inode(inode); |
Boaz Harrosh | ba9e5e9 | 2008-10-28 16:11:41 +0200 | [diff] [blame] | 1524 | } |