Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * JFFS2 -- Journalling Flash File System, Version 2. |
| 3 | * |
David Woodhouse | c00c310 | 2007-04-25 14:16:47 +0100 | [diff] [blame] | 4 | * Copyright © 2001-2007 Red Hat, Inc. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * |
| 6 | * Created by David Woodhouse <dwmw2@infradead.org> |
| 7 | * |
| 8 | * For licensing information, see the file 'LICENCE' in this directory. |
| 9 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | */ |
| 11 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <linux/fs.h> |
| 14 | #include <linux/time.h> |
| 15 | #include <linux/pagemap.h> |
| 16 | #include <linux/highmem.h> |
| 17 | #include <linux/crc32.h> |
| 18 | #include <linux/jffs2.h> |
| 19 | #include "nodelist.h" |
| 20 | |
Nick Piggin | 205c109 | 2007-10-16 01:25:18 -0700 | [diff] [blame] | 21 | static int jffs2_write_end(struct file *filp, struct address_space *mapping, |
| 22 | loff_t pos, unsigned len, unsigned copied, |
| 23 | struct page *pg, void *fsdata); |
| 24 | static int jffs2_write_begin(struct file *filp, struct address_space *mapping, |
| 25 | loff_t pos, unsigned len, unsigned flags, |
| 26 | struct page **pagep, void **fsdata); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | static int jffs2_readpage (struct file *filp, struct page *pg); |
| 28 | |
Christoph Hellwig | 7ea8085 | 2010-05-26 17:53:25 +0200 | [diff] [blame] | 29 | int jffs2_fsync(struct file *filp, int datasync) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | { |
Christoph Hellwig | 7ea8085 | 2010-05-26 17:53:25 +0200 | [diff] [blame] | 31 | struct inode *inode = filp->f_mapping->host; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb); |
| 33 | |
| 34 | /* Trigger GC to flush any pending writes for this inode */ |
| 35 | jffs2_flush_wbuf_gc(c, inode->i_ino); |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 36 | |
| 37 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | } |
| 39 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 40 | const struct file_operations jffs2_file_operations = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | { |
| 42 | .llseek = generic_file_llseek, |
| 43 | .open = generic_file_open, |
Badari Pulavarty | 543ade1 | 2006-09-30 23:28:48 -0700 | [diff] [blame] | 44 | .read = do_sync_read, |
| 45 | .aio_read = generic_file_aio_read, |
| 46 | .write = do_sync_write, |
| 47 | .aio_write = generic_file_aio_write, |
Stoyan Gaydarov | 0533400b | 2008-07-07 07:45:59 -0500 | [diff] [blame] | 48 | .unlocked_ioctl=jffs2_ioctl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | .mmap = generic_file_readonly_mmap, |
| 50 | .fsync = jffs2_fsync, |
Jens Axboe | 5ffc4ef | 2007-06-01 11:49:19 +0200 | [diff] [blame] | 51 | .splice_read = generic_file_splice_read, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | }; |
| 53 | |
| 54 | /* jffs2_file_inode_operations */ |
| 55 | |
Arjan van de Ven | 92e1d5b | 2007-02-12 00:55:39 -0800 | [diff] [blame] | 56 | const struct inode_operations jffs2_file_inode_operations = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | { |
Linus Torvalds | 18f4c64 | 2009-08-28 12:29:03 -0700 | [diff] [blame] | 58 | .check_acl = jffs2_check_acl, |
KaiGai Kohei | aa98d7c | 2006-05-13 15:09:47 +0900 | [diff] [blame] | 59 | .setattr = jffs2_setattr, |
| 60 | .setxattr = jffs2_setxattr, |
| 61 | .getxattr = jffs2_getxattr, |
| 62 | .listxattr = jffs2_listxattr, |
| 63 | .removexattr = jffs2_removexattr |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | }; |
| 65 | |
Christoph Hellwig | f5e54d6 | 2006-06-28 04:26:44 -0700 | [diff] [blame] | 66 | const struct address_space_operations jffs2_file_address_operations = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | { |
| 68 | .readpage = jffs2_readpage, |
Nick Piggin | 205c109 | 2007-10-16 01:25:18 -0700 | [diff] [blame] | 69 | .write_begin = jffs2_write_begin, |
| 70 | .write_end = jffs2_write_end, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | }; |
| 72 | |
| 73 | static int jffs2_do_readpage_nolock (struct inode *inode, struct page *pg) |
| 74 | { |
| 75 | struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode); |
| 76 | struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb); |
| 77 | unsigned char *pg_buf; |
| 78 | int ret; |
| 79 | |
| 80 | D2(printk(KERN_DEBUG "jffs2_do_readpage_nolock(): ino #%lu, page at offset 0x%lx\n", inode->i_ino, pg->index << PAGE_CACHE_SHIFT)); |
| 81 | |
Matt Mackall | cd7619d | 2005-05-01 08:59:01 -0700 | [diff] [blame] | 82 | BUG_ON(!PageLocked(pg)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | |
| 84 | pg_buf = kmap(pg); |
| 85 | /* FIXME: Can kmap fail? */ |
| 86 | |
| 87 | ret = jffs2_read_inode_range(c, f, pg_buf, pg->index << PAGE_CACHE_SHIFT, PAGE_CACHE_SIZE); |
| 88 | |
| 89 | if (ret) { |
| 90 | ClearPageUptodate(pg); |
| 91 | SetPageError(pg); |
| 92 | } else { |
| 93 | SetPageUptodate(pg); |
| 94 | ClearPageError(pg); |
| 95 | } |
| 96 | |
| 97 | flush_dcache_page(pg); |
| 98 | kunmap(pg); |
| 99 | |
| 100 | D2(printk(KERN_DEBUG "readpage finished\n")); |
Anders Grafström | 57ca7de | 2009-08-04 13:11:47 +0200 | [diff] [blame] | 101 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | } |
| 103 | |
| 104 | int jffs2_do_readpage_unlock(struct inode *inode, struct page *pg) |
| 105 | { |
| 106 | int ret = jffs2_do_readpage_nolock(inode, pg); |
| 107 | unlock_page(pg); |
| 108 | return ret; |
| 109 | } |
| 110 | |
| 111 | |
| 112 | static int jffs2_readpage (struct file *filp, struct page *pg) |
| 113 | { |
| 114 | struct jffs2_inode_info *f = JFFS2_INODE_INFO(pg->mapping->host); |
| 115 | int ret; |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 116 | |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 117 | mutex_lock(&f->sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | ret = jffs2_do_readpage_unlock(pg->mapping->host, pg); |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 119 | mutex_unlock(&f->sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | return ret; |
| 121 | } |
| 122 | |
Nick Piggin | 205c109 | 2007-10-16 01:25:18 -0700 | [diff] [blame] | 123 | static int jffs2_write_begin(struct file *filp, struct address_space *mapping, |
| 124 | loff_t pos, unsigned len, unsigned flags, |
| 125 | struct page **pagep, void **fsdata) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | { |
Nick Piggin | 205c109 | 2007-10-16 01:25:18 -0700 | [diff] [blame] | 127 | struct page *pg; |
| 128 | struct inode *inode = mapping->host; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode); |
Nick Piggin | 205c109 | 2007-10-16 01:25:18 -0700 | [diff] [blame] | 130 | pgoff_t index = pos >> PAGE_CACHE_SHIFT; |
Alexey Korolev | abe2f41 | 2008-04-14 20:45:06 +0100 | [diff] [blame] | 131 | uint32_t pageofs = index << PAGE_CACHE_SHIFT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | int ret = 0; |
| 133 | |
Nick Piggin | 54566b2 | 2009-01-04 12:00:53 -0800 | [diff] [blame] | 134 | pg = grab_cache_page_write_begin(mapping, index, flags); |
Nick Piggin | 205c109 | 2007-10-16 01:25:18 -0700 | [diff] [blame] | 135 | if (!pg) |
| 136 | return -ENOMEM; |
| 137 | *pagep = pg; |
| 138 | |
| 139 | D1(printk(KERN_DEBUG "jffs2_write_begin()\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | |
| 141 | if (pageofs > inode->i_size) { |
| 142 | /* Make new hole frag from old EOF to new page */ |
| 143 | struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb); |
| 144 | struct jffs2_raw_inode ri; |
| 145 | struct jffs2_full_dnode *fn; |
David Woodhouse | 9fe4854 | 2006-05-23 00:38:06 +0100 | [diff] [blame] | 146 | uint32_t alloc_len; |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 147 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | D1(printk(KERN_DEBUG "Writing new hole frag 0x%x-0x%x between current EOF and new page\n", |
| 149 | (unsigned int)inode->i_size, pageofs)); |
| 150 | |
David Woodhouse | 9fe4854 | 2006-05-23 00:38:06 +0100 | [diff] [blame] | 151 | ret = jffs2_reserve_space(c, sizeof(ri), &alloc_len, |
| 152 | ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | if (ret) |
Nick Piggin | 205c109 | 2007-10-16 01:25:18 -0700 | [diff] [blame] | 154 | goto out_page; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 156 | mutex_lock(&f->sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | memset(&ri, 0, sizeof(ri)); |
| 158 | |
| 159 | ri.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); |
| 160 | ri.nodetype = cpu_to_je16(JFFS2_NODETYPE_INODE); |
| 161 | ri.totlen = cpu_to_je32(sizeof(ri)); |
| 162 | ri.hdr_crc = cpu_to_je32(crc32(0, &ri, sizeof(struct jffs2_unknown_node)-4)); |
| 163 | |
| 164 | ri.ino = cpu_to_je32(f->inocache->ino); |
| 165 | ri.version = cpu_to_je32(++f->highest_version); |
| 166 | ri.mode = cpu_to_jemode(inode->i_mode); |
| 167 | ri.uid = cpu_to_je16(inode->i_uid); |
| 168 | ri.gid = cpu_to_je16(inode->i_gid); |
| 169 | ri.isize = cpu_to_je32(max((uint32_t)inode->i_size, pageofs)); |
| 170 | ri.atime = ri.ctime = ri.mtime = cpu_to_je32(get_seconds()); |
| 171 | ri.offset = cpu_to_je32(inode->i_size); |
| 172 | ri.dsize = cpu_to_je32(pageofs - inode->i_size); |
| 173 | ri.csize = cpu_to_je32(0); |
| 174 | ri.compr = JFFS2_COMPR_ZERO; |
| 175 | ri.node_crc = cpu_to_je32(crc32(0, &ri, sizeof(ri)-8)); |
| 176 | ri.data_crc = cpu_to_je32(0); |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 177 | |
David Woodhouse | 9fe4854 | 2006-05-23 00:38:06 +0100 | [diff] [blame] | 178 | fn = jffs2_write_dnode(c, f, &ri, NULL, 0, ALLOC_NORMAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | |
| 180 | if (IS_ERR(fn)) { |
| 181 | ret = PTR_ERR(fn); |
| 182 | jffs2_complete_reservation(c); |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 183 | mutex_unlock(&f->sem); |
Nick Piggin | 205c109 | 2007-10-16 01:25:18 -0700 | [diff] [blame] | 184 | goto out_page; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | } |
| 186 | ret = jffs2_add_full_dnode_to_inode(c, f, fn); |
| 187 | if (f->metadata) { |
| 188 | jffs2_mark_node_obsolete(c, f->metadata->raw); |
| 189 | jffs2_free_full_dnode(f->metadata); |
| 190 | f->metadata = NULL; |
| 191 | } |
| 192 | if (ret) { |
Nick Piggin | 205c109 | 2007-10-16 01:25:18 -0700 | [diff] [blame] | 193 | D1(printk(KERN_DEBUG "Eep. add_full_dnode_to_inode() failed in write_begin, returned %d\n", ret)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | jffs2_mark_node_obsolete(c, fn->raw); |
| 195 | jffs2_free_full_dnode(fn); |
| 196 | jffs2_complete_reservation(c); |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 197 | mutex_unlock(&f->sem); |
Nick Piggin | 205c109 | 2007-10-16 01:25:18 -0700 | [diff] [blame] | 198 | goto out_page; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | } |
| 200 | jffs2_complete_reservation(c); |
| 201 | inode->i_size = pageofs; |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 202 | mutex_unlock(&f->sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | } |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 204 | |
Nick Piggin | 205c109 | 2007-10-16 01:25:18 -0700 | [diff] [blame] | 205 | /* |
| 206 | * Read in the page if it wasn't already present. Cannot optimize away |
| 207 | * the whole page write case until jffs2_write_end can handle the |
| 208 | * case of a short-copy. |
| 209 | */ |
| 210 | if (!PageUptodate(pg)) { |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 211 | mutex_lock(&f->sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | ret = jffs2_do_readpage_nolock(inode, pg); |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 213 | mutex_unlock(&f->sem); |
Nick Piggin | 205c109 | 2007-10-16 01:25:18 -0700 | [diff] [blame] | 214 | if (ret) |
| 215 | goto out_page; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | } |
Nick Piggin | 205c109 | 2007-10-16 01:25:18 -0700 | [diff] [blame] | 217 | D1(printk(KERN_DEBUG "end write_begin(). pg->flags %lx\n", pg->flags)); |
| 218 | return ret; |
| 219 | |
| 220 | out_page: |
| 221 | unlock_page(pg); |
| 222 | page_cache_release(pg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | return ret; |
| 224 | } |
| 225 | |
Nick Piggin | 205c109 | 2007-10-16 01:25:18 -0700 | [diff] [blame] | 226 | static int jffs2_write_end(struct file *filp, struct address_space *mapping, |
| 227 | loff_t pos, unsigned len, unsigned copied, |
| 228 | struct page *pg, void *fsdata) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | { |
| 230 | /* Actually commit the write from the page cache page we're looking at. |
| 231 | * For now, we write the full page out each time. It sucks, but it's simple |
| 232 | */ |
Nick Piggin | 205c109 | 2007-10-16 01:25:18 -0700 | [diff] [blame] | 233 | struct inode *inode = mapping->host; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode); |
| 235 | struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb); |
| 236 | struct jffs2_raw_inode *ri; |
Nick Piggin | 205c109 | 2007-10-16 01:25:18 -0700 | [diff] [blame] | 237 | unsigned start = pos & (PAGE_CACHE_SIZE - 1); |
| 238 | unsigned end = start + copied; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | unsigned aligned_start = start & ~3; |
| 240 | int ret = 0; |
| 241 | uint32_t writtenlen = 0; |
| 242 | |
Nick Piggin | 205c109 | 2007-10-16 01:25:18 -0700 | [diff] [blame] | 243 | D1(printk(KERN_DEBUG "jffs2_write_end(): ino #%lu, page at 0x%lx, range %d-%d, flags %lx\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | inode->i_ino, pg->index << PAGE_CACHE_SHIFT, start, end, pg->flags)); |
| 245 | |
Nick Piggin | 205c109 | 2007-10-16 01:25:18 -0700 | [diff] [blame] | 246 | /* We need to avoid deadlock with page_cache_read() in |
| 247 | jffs2_garbage_collect_pass(). So the page must be |
| 248 | up to date to prevent page_cache_read() from trying |
| 249 | to re-lock it. */ |
| 250 | BUG_ON(!PageUptodate(pg)); |
| 251 | |
David Woodhouse | cf5eba5 | 2006-05-14 04:06:24 +0100 | [diff] [blame] | 252 | if (end == PAGE_CACHE_SIZE) { |
Nick Piggin | 205c109 | 2007-10-16 01:25:18 -0700 | [diff] [blame] | 253 | /* When writing out the end of a page, write out the |
| 254 | _whole_ page. This helps to reduce the number of |
| 255 | nodes in files which have many short writes, like |
| 256 | syslog files. */ |
Nick Piggin | 2a754b5 | 2007-10-19 17:16:53 +1000 | [diff] [blame] | 257 | aligned_start = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | } |
| 259 | |
| 260 | ri = jffs2_alloc_raw_inode(); |
| 261 | |
| 262 | if (!ri) { |
Nick Piggin | 205c109 | 2007-10-16 01:25:18 -0700 | [diff] [blame] | 263 | D1(printk(KERN_DEBUG "jffs2_write_end(): Allocation of raw inode failed\n")); |
| 264 | unlock_page(pg); |
| 265 | page_cache_release(pg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | return -ENOMEM; |
| 267 | } |
| 268 | |
| 269 | /* Set the fields that the generic jffs2_write_inode_range() code can't find */ |
| 270 | ri->ino = cpu_to_je32(inode->i_ino); |
| 271 | ri->mode = cpu_to_jemode(inode->i_mode); |
| 272 | ri->uid = cpu_to_je16(inode->i_uid); |
| 273 | ri->gid = cpu_to_je16(inode->i_gid); |
| 274 | ri->isize = cpu_to_je32((uint32_t)inode->i_size); |
| 275 | ri->atime = ri->ctime = ri->mtime = cpu_to_je32(get_seconds()); |
| 276 | |
| 277 | /* In 2.4, it was already kmapped by generic_file_write(). Doesn't |
| 278 | hurt to do it again. The alternative is ifdefs, which are ugly. */ |
| 279 | kmap(pg); |
| 280 | |
| 281 | ret = jffs2_write_inode_range(c, f, ri, page_address(pg) + aligned_start, |
| 282 | (pg->index << PAGE_CACHE_SHIFT) + aligned_start, |
| 283 | end - aligned_start, &writtenlen); |
| 284 | |
| 285 | kunmap(pg); |
| 286 | |
| 287 | if (ret) { |
| 288 | /* There was an error writing. */ |
| 289 | SetPageError(pg); |
| 290 | } |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 291 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | /* Adjust writtenlen for the padding we did, so we don't confuse our caller */ |
Nick Piggin | 2a754b5 | 2007-10-19 17:16:53 +1000 | [diff] [blame] | 293 | writtenlen -= min(writtenlen, (start - aligned_start)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | |
| 295 | if (writtenlen) { |
Nick Piggin | 2a754b5 | 2007-10-19 17:16:53 +1000 | [diff] [blame] | 296 | if (inode->i_size < pos + writtenlen) { |
| 297 | inode->i_size = pos + writtenlen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | inode->i_blocks = (inode->i_size + 511) >> 9; |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 299 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | inode->i_ctime = inode->i_mtime = ITIME(je32_to_cpu(ri->ctime)); |
| 301 | } |
| 302 | } |
| 303 | |
| 304 | jffs2_free_raw_inode(ri); |
| 305 | |
| 306 | if (start+writtenlen < end) { |
| 307 | /* generic_file_write has written more to the page cache than we've |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 308 | actually written to the medium. Mark the page !Uptodate so that |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | it gets reread */ |
Nick Piggin | 205c109 | 2007-10-16 01:25:18 -0700 | [diff] [blame] | 310 | D1(printk(KERN_DEBUG "jffs2_write_end(): Not all bytes written. Marking page !uptodate\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | SetPageError(pg); |
| 312 | ClearPageUptodate(pg); |
| 313 | } |
| 314 | |
Nick Piggin | 205c109 | 2007-10-16 01:25:18 -0700 | [diff] [blame] | 315 | D1(printk(KERN_DEBUG "jffs2_write_end() returning %d\n", |
| 316 | writtenlen > 0 ? writtenlen : ret)); |
| 317 | unlock_page(pg); |
| 318 | page_cache_release(pg); |
| 319 | return writtenlen > 0 ? writtenlen : ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | } |