2
* Copyright (C) 2005, 2006
3
* Avishay Traeger (avishay@gmail.com)
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* Copyright (C) 2008, 2009
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* Boaz Harrosh <bharrosh@panasas.com>
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* Copyrights for code taken from ext2:
8
* Copyright (C) 1992, 1993, 1994, 1995
9
* Remy Card (card@masi.ibp.fr)
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* Laboratoire MASI - Institut Blaise Pascal
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* Universite Pierre et Marie Curie (Paris VI)
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* linux/fs/minix/inode.c
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* Copyright (C) 1991, 1992 Linus Torvalds
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* This file is part of exofs.
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* exofs is free software; you can redistribute it and/or modify
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* 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
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* valid version of GPL for the Linux kernel is version 2, the only valid
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* version of GPL for exofs is version 2.
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
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* GNU General Public License for more details.
29
* You should have received a copy of the GNU General Public License
30
* along with exofs; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
34
#include <linux/writeback.h>
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#include <linux/buffer_head.h>
36
#include <scsi/scsi_device.h>
40
#ifdef CONFIG_EXOFS_DEBUG
41
# define EXOFS_DEBUG_OBJ_ISIZE 1
45
struct exofs_sb_info *sbi;
46
struct request_queue *req_q;
48
unsigned expected_pages;
53
loff_t pg_first; /* keep 64bit also in 32-arches */
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static void _pcol_init(struct page_collect *pcol, unsigned expected_pages,
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struct exofs_sb_info *sbi = inode->i_sb->s_fs_info;
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pcol->req_q = osd_request_queue(sbi->s_dev);
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pcol->expected_pages = expected_pages;
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EXOFS_DBGMSG("_pcol_init ino=0x%lx expected_pages=%u\n", inode->i_ino,
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static void _pcol_reset(struct page_collect *pcol)
77
pcol->expected_pages -= min(pcol->nr_pages, pcol->expected_pages);
83
EXOFS_DBGMSG("_pcol_reset ino=0x%lx expected_pages=%u\n",
84
pcol->inode->i_ino, pcol->expected_pages);
86
/* this is probably the end of the loop but in writes
87
* it might not end here. don't be left with nothing
89
if (!pcol->expected_pages)
90
pcol->expected_pages = 128;
93
static int pcol_try_alloc(struct page_collect *pcol)
95
int pages = min_t(unsigned, pcol->expected_pages, BIO_MAX_PAGES);
97
for (; pages; pages >>= 1) {
98
pcol->bio = bio_alloc(GFP_KERNEL, pages);
99
if (likely(pcol->bio))
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EXOFS_ERR("Failed to kcalloc expected_pages=%u\n",
104
pcol->expected_pages);
108
static void pcol_free(struct page_collect *pcol)
114
static int pcol_add_page(struct page_collect *pcol, struct page *page,
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int added_len = bio_add_pc_page(pcol->req_q, pcol->bio, page, len, 0);
118
if (unlikely(len != added_len))
126
static int update_read_page(struct page *page, int ret)
129
/* Everything is OK */
130
SetPageUptodate(page);
132
ClearPageError(page);
133
} else if (ret == -EFAULT) {
134
/* In this case we were trying to read something that wasn't on
135
* disk yet - return a page full of zeroes. This should be OK,
136
* because the object should be empty (if there was a write
137
* before this read, the read would be waiting with the page
139
clear_highpage(page);
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SetPageUptodate(page);
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ClearPageError(page);
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ret = 0; /* recovered error */
145
EXOFS_DBGMSG("recovered read error\n");
152
static void update_write_page(struct page *page, int ret)
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mapping_set_error(page->mapping, ret);
158
end_page_writeback(page);
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/* Called at the end of reads, to optionally unlock pages and update their
164
static int __readpages_done(struct osd_request *or, struct page_collect *pcol,
167
struct bio_vec *bvec;
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int ret = exofs_check_ok_resid(or, &resid, NULL);
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good_bytes = pcol->length;
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good_bytes = pcol->length - resid;
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EXOFS_DBGMSG("readpages_done(0x%lx) good_bytes=0x%llx"
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" length=0x%lx nr_pages=%u\n",
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pcol->inode->i_ino, _LLU(good_bytes), pcol->length,
188
__bio_for_each_segment(bvec, pcol->bio, i, 0) {
189
struct page *page = bvec->bv_page;
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struct inode *inode = page->mapping->host;
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if (inode != pcol->inode)
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continue; /* osd might add more pages at end */
196
if (likely(length < good_bytes))
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EXOFS_DBGMSG(" readpages_done(0x%lx, 0x%lx) %s\n",
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inode->i_ino, page->index,
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page_stat ? "bad_bytes" : "good_bytes");
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ret = update_read_page(page, page_stat);
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length += bvec->bv_len;
212
EXOFS_DBGMSG("readpages_done END\n");
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/* callback of async reads */
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static void readpages_done(struct osd_request *or, void *p)
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struct page_collect *pcol = p;
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__readpages_done(or, pcol, true);
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atomic_dec(&pcol->sbi->s_curr_pending);
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static void _unlock_pcol_pages(struct page_collect *pcol, int ret, int rw)
228
struct bio_vec *bvec;
231
__bio_for_each_segment(bvec, pcol->bio, i, 0) {
232
struct page *page = bvec->bv_page;
235
update_read_page(page, ret);
237
update_write_page(page, ret);
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static int read_exec(struct page_collect *pcol, bool is_sync)
246
struct exofs_i_info *oi = exofs_i(pcol->inode);
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struct osd_obj_id obj = {pcol->sbi->s_pid,
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pcol->inode->i_ino + EXOFS_OBJ_OFF};
249
struct osd_request *or = NULL;
250
struct page_collect *pcol_copy = NULL;
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loff_t i_start = pcol->pg_first << PAGE_CACHE_SHIFT;
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/* see comment in _readpage() about sync reads */
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WARN_ON(is_sync && (pcol->nr_pages != 1));
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or = osd_start_request(pcol->sbi->s_dev, GFP_KERNEL);
266
osd_req_read(or, &obj, i_start, pcol->bio, pcol->length);
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exofs_sync_op(or, pcol->sbi->s_timeout, oi->i_cred);
270
return __readpages_done(or, pcol, false);
273
pcol_copy = kmalloc(sizeof(*pcol_copy), GFP_KERNEL);
280
ret = exofs_async_op(or, readpages_done, pcol_copy, oi->i_cred);
284
atomic_inc(&pcol->sbi->s_curr_pending);
286
EXOFS_DBGMSG("read_exec obj=0x%llx start=0x%llx length=0x%lx\n",
287
obj.id, _LLU(i_start), pcol->length);
289
/* pages ownership was passed to pcol_copy */
295
_unlock_pcol_pages(pcol, ret, READ);
296
else /* Pages unlocked by caller in sync mode only free bio */
305
/* readpage_strip is called either directly from readpage() or by the VFS from
306
* within read_cache_pages(), to add one more page to be read. It will try to
307
* collect as many contiguous pages as posible. If a discontinuity is
308
* encountered, or it runs out of resources, it will submit the previous segment
309
* and will start a new collection. Eventually caller must submit the last
310
* segment if present.
312
static int readpage_strip(void *data, struct page *page)
314
struct page_collect *pcol = data;
315
struct inode *inode = pcol->inode;
316
struct exofs_i_info *oi = exofs_i(inode);
317
loff_t i_size = i_size_read(inode);
318
pgoff_t end_index = i_size >> PAGE_CACHE_SHIFT;
322
/* FIXME: Just for debugging, will be removed */
323
if (PageUptodate(page))
324
EXOFS_ERR("PageUptodate(0x%lx, 0x%lx)\n", pcol->inode->i_ino,
327
if (page->index < end_index)
328
len = PAGE_CACHE_SIZE;
329
else if (page->index == end_index)
330
len = i_size & ~PAGE_CACHE_MASK;
334
if (!len || !obj_created(oi)) {
335
/* this will be out of bounds, or doesn't exist yet.
336
* Current page is cleared and the request is split
338
clear_highpage(page);
340
SetPageUptodate(page);
342
ClearPageError(page);
345
EXOFS_DBGMSG("readpage_strip(0x%lx, 0x%lx) empty page,"
346
" splitting\n", inode->i_ino, page->index);
348
return read_exec(pcol, false);
353
if (unlikely(pcol->pg_first == -1)) {
354
pcol->pg_first = page->index;
355
} else if (unlikely((pcol->pg_first + pcol->nr_pages) !=
357
/* Discontinuity detected, split the request */
358
ret = read_exec(pcol, false);
365
ret = pcol_try_alloc(pcol);
370
if (len != PAGE_CACHE_SIZE)
371
zero_user(page, len, PAGE_CACHE_SIZE - len);
373
EXOFS_DBGMSG(" readpage_strip(0x%lx, 0x%lx) len=0x%zx\n",
374
inode->i_ino, page->index, len);
376
ret = pcol_add_page(pcol, page, len);
378
EXOFS_DBGMSG("Failed pcol_add_page pages[i]=%p "
379
"this_len=0x%zx nr_pages=%u length=0x%lx\n",
380
page, len, pcol->nr_pages, pcol->length);
382
/* split the request, and start again with current page */
383
ret = read_exec(pcol, false);
393
/* SetPageError(page); ??? */
398
static int exofs_readpages(struct file *file, struct address_space *mapping,
399
struct list_head *pages, unsigned nr_pages)
401
struct page_collect pcol;
404
_pcol_init(&pcol, nr_pages, mapping->host);
406
ret = read_cache_pages(mapping, pages, readpage_strip, &pcol);
408
EXOFS_ERR("read_cache_pages => %d\n", ret);
412
return read_exec(&pcol, false);
415
static int _readpage(struct page *page, bool is_sync)
417
struct page_collect pcol;
420
_pcol_init(&pcol, 1, page->mapping->host);
422
/* readpage_strip might call read_exec(,async) inside at several places
423
* but this is safe for is_async=0 since read_exec will not do anything
424
* when we have a single page.
426
ret = readpage_strip(&pcol, page);
428
EXOFS_ERR("_readpage => %d\n", ret);
432
return read_exec(&pcol, is_sync);
436
* We don't need the file
438
static int exofs_readpage(struct file *file, struct page *page)
440
return _readpage(page, false);
443
/* Callback for osd_write. All writes are asynchronouse */
444
static void writepages_done(struct osd_request *or, void *p)
446
struct page_collect *pcol = p;
447
struct bio_vec *bvec;
453
int ret = exofs_check_ok_resid(or, NULL, &resid);
456
atomic_dec(&pcol->sbi->s_curr_pending);
459
good_bytes = pcol->length;
463
good_bytes = pcol->length - resid;
465
EXOFS_DBGMSG("writepages_done(0x%lx) good_bytes=0x%llx"
466
" length=0x%lx nr_pages=%u\n",
467
pcol->inode->i_ino, _LLU(good_bytes), pcol->length,
470
__bio_for_each_segment(bvec, pcol->bio, i, 0) {
471
struct page *page = bvec->bv_page;
472
struct inode *inode = page->mapping->host;
475
if (inode != pcol->inode)
476
continue; /* osd might add more pages to a bio */
478
if (likely(length < good_bytes))
483
update_write_page(page, page_stat);
485
EXOFS_DBGMSG(" writepages_done(0x%lx, 0x%lx) status=%d\n",
486
inode->i_ino, page->index, page_stat);
488
length += bvec->bv_len;
493
EXOFS_DBGMSG("writepages_done END\n");
496
static int write_exec(struct page_collect *pcol)
498
struct exofs_i_info *oi = exofs_i(pcol->inode);
499
struct osd_obj_id obj = {pcol->sbi->s_pid,
500
pcol->inode->i_ino + EXOFS_OBJ_OFF};
501
struct osd_request *or = NULL;
502
struct page_collect *pcol_copy = NULL;
503
loff_t i_start = pcol->pg_first << PAGE_CACHE_SHIFT;
509
or = osd_start_request(pcol->sbi->s_dev, GFP_KERNEL);
511
EXOFS_ERR("write_exec: Faild to osd_start_request()\n");
516
pcol_copy = kmalloc(sizeof(*pcol_copy), GFP_KERNEL);
518
EXOFS_ERR("write_exec: Faild to kmalloc(pcol)\n");
525
pcol_copy->bio->bi_rw |= (1 << BIO_RW); /* FIXME: bio_set_dir() */
526
osd_req_write(or, &obj, i_start, pcol_copy->bio, pcol_copy->length);
527
ret = exofs_async_op(or, writepages_done, pcol_copy, oi->i_cred);
529
EXOFS_ERR("write_exec: exofs_async_op() Faild\n");
533
atomic_inc(&pcol->sbi->s_curr_pending);
534
EXOFS_DBGMSG("write_exec(0x%lx, 0x%llx) start=0x%llx length=0x%lx\n",
535
pcol->inode->i_ino, pcol->pg_first, _LLU(i_start),
537
/* pages ownership was passed to pcol_copy */
542
_unlock_pcol_pages(pcol, ret, WRITE);
549
/* writepage_strip is called either directly from writepage() or by the VFS from
550
* within write_cache_pages(), to add one more page to be written to storage.
551
* It will try to collect as many contiguous pages as possible. If a
552
* discontinuity is encountered or it runs out of resources it will submit the
553
* previous segment and will start a new collection.
554
* Eventually caller must submit the last segment if present.
556
static int writepage_strip(struct page *page,
557
struct writeback_control *wbc_unused, void *data)
559
struct page_collect *pcol = data;
560
struct inode *inode = pcol->inode;
561
struct exofs_i_info *oi = exofs_i(inode);
562
loff_t i_size = i_size_read(inode);
563
pgoff_t end_index = i_size >> PAGE_CACHE_SHIFT;
567
BUG_ON(!PageLocked(page));
569
ret = wait_obj_created(oi);
573
if (page->index < end_index)
574
/* in this case, the page is within the limits of the file */
575
len = PAGE_CACHE_SIZE;
577
len = i_size & ~PAGE_CACHE_MASK;
579
if (page->index > end_index || !len) {
580
/* in this case, the page is outside the limits
581
* (truncate in progress)
583
ret = write_exec(pcol);
587
ClearPageError(page);
595
if (unlikely(pcol->pg_first == -1)) {
596
pcol->pg_first = page->index;
597
} else if (unlikely((pcol->pg_first + pcol->nr_pages) !=
599
/* Discontinuity detected, split the request */
600
ret = write_exec(pcol);
607
ret = pcol_try_alloc(pcol);
612
EXOFS_DBGMSG(" writepage_strip(0x%lx, 0x%lx) len=0x%zx\n",
613
inode->i_ino, page->index, len);
615
ret = pcol_add_page(pcol, page, len);
617
EXOFS_DBGMSG("Failed pcol_add_page "
618
"nr_pages=%u total_length=0x%lx\n",
619
pcol->nr_pages, pcol->length);
621
/* split the request, next loop will start again */
622
ret = write_exec(pcol);
624
EXOFS_DBGMSG("write_exec faild => %d", ret);
631
BUG_ON(PageWriteback(page));
632
set_page_writeback(page);
637
set_bit(AS_EIO, &page->mapping->flags);
642
static int exofs_writepages(struct address_space *mapping,
643
struct writeback_control *wbc)
645
struct page_collect pcol;
646
long start, end, expected_pages;
649
start = wbc->range_start >> PAGE_CACHE_SHIFT;
650
end = (wbc->range_end == LLONG_MAX) ?
651
start + mapping->nrpages :
652
wbc->range_end >> PAGE_CACHE_SHIFT;
655
expected_pages = min(end - start + 1, 32L);
657
expected_pages = mapping->nrpages;
659
EXOFS_DBGMSG("inode(0x%lx) wbc->start=0x%llx wbc->end=0x%llx"
660
" m->nrpages=%lu start=0x%lx end=0x%lx\n",
661
mapping->host->i_ino, wbc->range_start, wbc->range_end,
662
mapping->nrpages, start, end);
664
_pcol_init(&pcol, expected_pages, mapping->host);
666
ret = write_cache_pages(mapping, wbc, writepage_strip, &pcol);
668
EXOFS_ERR("write_cache_pages => %d\n", ret);
672
return write_exec(&pcol);
675
static int exofs_writepage(struct page *page, struct writeback_control *wbc)
677
struct page_collect pcol;
680
_pcol_init(&pcol, 1, page->mapping->host);
682
ret = writepage_strip(page, NULL, &pcol);
684
EXOFS_ERR("exofs_writepage => %d\n", ret);
688
return write_exec(&pcol);
691
int exofs_write_begin(struct file *file, struct address_space *mapping,
692
loff_t pos, unsigned len, unsigned flags,
693
struct page **pagep, void **fsdata)
700
ret = simple_write_begin(file, mapping, pos, len, flags, pagep,
703
EXOFS_DBGMSG("simple_write_begin faild\n");
710
/* read modify write */
711
if (!PageUptodate(page) && (len != PAGE_CACHE_SIZE)) {
712
ret = _readpage(page, true);
714
/*SetPageError was done by _readpage. Is it ok?*/
716
EXOFS_DBGMSG("__readpage_filler faild\n");
723
static int exofs_write_begin_export(struct file *file,
724
struct address_space *mapping,
725
loff_t pos, unsigned len, unsigned flags,
726
struct page **pagep, void **fsdata)
730
return exofs_write_begin(file, mapping, pos, len, flags, pagep,
734
const struct address_space_operations exofs_aops = {
735
.readpage = exofs_readpage,
736
.readpages = exofs_readpages,
737
.writepage = exofs_writepage,
738
.writepages = exofs_writepages,
739
.write_begin = exofs_write_begin_export,
740
.write_end = simple_write_end,
743
/******************************************************************************
745
*****************************************************************************/
748
* Test whether an inode is a fast symlink.
750
static inline int exofs_inode_is_fast_symlink(struct inode *inode)
752
struct exofs_i_info *oi = exofs_i(inode);
754
return S_ISLNK(inode->i_mode) && (oi->i_data[0] != 0);
758
* get_block_t - Fill in a buffer_head
759
* An OSD takes care of block allocation so we just fake an allocation by
760
* putting in the inode's sector_t in the buffer_head.
761
* TODO: What about the case of create==0 and @iblock does not exist in the
764
static int exofs_get_block(struct inode *inode, sector_t iblock,
765
struct buffer_head *bh_result, int create)
767
map_bh(bh_result, inode->i_sb, iblock);
771
const struct osd_attr g_attr_logical_length = ATTR_DEF(
772
OSD_APAGE_OBJECT_INFORMATION, OSD_ATTR_OI_LOGICAL_LENGTH, 8);
775
* Truncate a file to the specified size - all we have to do is set the size
776
* attribute. We make sure the object exists first.
778
void exofs_truncate(struct inode *inode)
780
struct exofs_sb_info *sbi = inode->i_sb->s_fs_info;
781
struct exofs_i_info *oi = exofs_i(inode);
782
struct osd_obj_id obj = {sbi->s_pid, inode->i_ino + EXOFS_OBJ_OFF};
783
struct osd_request *or;
784
struct osd_attr attr;
785
loff_t isize = i_size_read(inode);
789
if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
790
|| S_ISLNK(inode->i_mode)))
792
if (exofs_inode_is_fast_symlink(inode))
794
if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
796
inode->i_mtime = inode->i_ctime = CURRENT_TIME;
798
nobh_truncate_page(inode->i_mapping, isize, exofs_get_block);
800
or = osd_start_request(sbi->s_dev, GFP_KERNEL);
802
EXOFS_ERR("ERROR: exofs_truncate: osd_start_request failed\n");
806
osd_req_set_attributes(or, &obj);
808
newsize = cpu_to_be64((u64)isize);
809
attr = g_attr_logical_length;
810
attr.val_ptr = &newsize;
811
osd_req_add_set_attr_list(or, &attr, 1);
813
/* if we are about to truncate an object, and it hasn't been
816
if (unlikely(wait_obj_created(oi)))
819
ret = exofs_sync_op(or, sbi->s_timeout, oi->i_cred);
825
mark_inode_dirty(inode);
828
make_bad_inode(inode);
833
* Set inode attributes - just call generic functions.
835
int exofs_setattr(struct dentry *dentry, struct iattr *iattr)
837
struct inode *inode = dentry->d_inode;
840
error = inode_change_ok(inode, iattr);
844
error = inode_setattr(inode, iattr);
849
* Read an inode from the OSD, and return it as is. We also return the size
850
* attribute in the 'sanity' argument if we got compiled with debugging turned
853
static int exofs_get_inode(struct super_block *sb, struct exofs_i_info *oi,
854
struct exofs_fcb *inode, uint64_t *sanity)
856
struct exofs_sb_info *sbi = sb->s_fs_info;
857
struct osd_request *or;
858
struct osd_attr attr;
859
struct osd_obj_id obj = {sbi->s_pid,
860
oi->vfs_inode.i_ino + EXOFS_OBJ_OFF};
863
exofs_make_credential(oi->i_cred, &obj);
865
or = osd_start_request(sbi->s_dev, GFP_KERNEL);
867
EXOFS_ERR("exofs_get_inode: osd_start_request failed.\n");
870
osd_req_get_attributes(or, &obj);
872
/* we need the inode attribute */
873
osd_req_add_get_attr_list(or, &g_attr_inode_data, 1);
875
#ifdef EXOFS_DEBUG_OBJ_ISIZE
876
/* we get the size attributes to do a sanity check */
877
osd_req_add_get_attr_list(or, &g_attr_logical_length, 1);
880
ret = exofs_sync_op(or, sbi->s_timeout, oi->i_cred);
884
attr = g_attr_inode_data;
885
ret = extract_attr_from_req(or, &attr);
887
EXOFS_ERR("exofs_get_inode: extract_attr_from_req failed\n");
891
WARN_ON(attr.len != EXOFS_INO_ATTR_SIZE);
892
memcpy(inode, attr.val_ptr, EXOFS_INO_ATTR_SIZE);
894
#ifdef EXOFS_DEBUG_OBJ_ISIZE
895
attr = g_attr_logical_length;
896
ret = extract_attr_from_req(or, &attr);
898
EXOFS_ERR("ERROR: extract attr from or failed\n");
901
*sanity = get_unaligned_be64(attr.val_ptr);
910
* Fill in an inode read from the OSD and set it up for use
912
struct inode *exofs_iget(struct super_block *sb, unsigned long ino)
914
struct exofs_i_info *oi;
915
struct exofs_fcb fcb;
917
uint64_t uninitialized_var(sanity);
920
inode = iget_locked(sb, ino);
922
return ERR_PTR(-ENOMEM);
923
if (!(inode->i_state & I_NEW))
927
/* read the inode from the osd */
928
ret = exofs_get_inode(sb, oi, &fcb, &sanity);
932
init_waitqueue_head(&oi->i_wq);
935
/* copy stuff from on-disk struct to in-memory struct */
936
inode->i_mode = le16_to_cpu(fcb.i_mode);
937
inode->i_uid = le32_to_cpu(fcb.i_uid);
938
inode->i_gid = le32_to_cpu(fcb.i_gid);
939
inode->i_nlink = le16_to_cpu(fcb.i_links_count);
940
inode->i_ctime.tv_sec = (signed)le32_to_cpu(fcb.i_ctime);
941
inode->i_atime.tv_sec = (signed)le32_to_cpu(fcb.i_atime);
942
inode->i_mtime.tv_sec = (signed)le32_to_cpu(fcb.i_mtime);
943
inode->i_ctime.tv_nsec =
944
inode->i_atime.tv_nsec = inode->i_mtime.tv_nsec = 0;
945
oi->i_commit_size = le64_to_cpu(fcb.i_size);
946
i_size_write(inode, oi->i_commit_size);
947
inode->i_blkbits = EXOFS_BLKSHIFT;
948
inode->i_generation = le32_to_cpu(fcb.i_generation);
950
#ifdef EXOFS_DEBUG_OBJ_ISIZE
951
if ((inode->i_size != sanity) &&
952
(!exofs_inode_is_fast_symlink(inode))) {
953
EXOFS_ERR("WARNING: Size of object from inode and "
954
"attributes differ (%lld != %llu)\n",
955
inode->i_size, _LLU(sanity));
959
oi->i_dir_start_lookup = 0;
961
if ((inode->i_nlink == 0) && (inode->i_mode == 0)) {
966
if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
969
old_decode_dev(le32_to_cpu(fcb.i_data[0]));
972
new_decode_dev(le32_to_cpu(fcb.i_data[1]));
974
memcpy(oi->i_data, fcb.i_data, sizeof(fcb.i_data));
977
if (S_ISREG(inode->i_mode)) {
978
inode->i_op = &exofs_file_inode_operations;
979
inode->i_fop = &exofs_file_operations;
980
inode->i_mapping->a_ops = &exofs_aops;
981
} else if (S_ISDIR(inode->i_mode)) {
982
inode->i_op = &exofs_dir_inode_operations;
983
inode->i_fop = &exofs_dir_operations;
984
inode->i_mapping->a_ops = &exofs_aops;
985
} else if (S_ISLNK(inode->i_mode)) {
986
if (exofs_inode_is_fast_symlink(inode))
987
inode->i_op = &exofs_fast_symlink_inode_operations;
989
inode->i_op = &exofs_symlink_inode_operations;
990
inode->i_mapping->a_ops = &exofs_aops;
993
inode->i_op = &exofs_special_inode_operations;
995
init_special_inode(inode, inode->i_mode,
996
old_decode_dev(le32_to_cpu(fcb.i_data[0])));
998
init_special_inode(inode, inode->i_mode,
999
new_decode_dev(le32_to_cpu(fcb.i_data[1])));
1002
unlock_new_inode(inode);
1007
return ERR_PTR(ret);
1010
int __exofs_wait_obj_created(struct exofs_i_info *oi)
1012
if (!obj_created(oi)) {
1013
BUG_ON(!obj_2bcreated(oi));
1014
wait_event(oi->i_wq, obj_created(oi));
1016
return unlikely(is_bad_inode(&oi->vfs_inode)) ? -EIO : 0;
1019
* Callback function from exofs_new_inode(). The important thing is that we
1020
* set the obj_created flag so that other methods know that the object exists on
1023
static void create_done(struct osd_request *or, void *p)
1025
struct inode *inode = p;
1026
struct exofs_i_info *oi = exofs_i(inode);
1027
struct exofs_sb_info *sbi = inode->i_sb->s_fs_info;
1030
ret = exofs_check_ok(or);
1031
osd_end_request(or);
1032
atomic_dec(&sbi->s_curr_pending);
1034
if (unlikely(ret)) {
1035
EXOFS_ERR("object=0x%llx creation faild in pid=0x%llx",
1036
_LLU(sbi->s_pid), _LLU(inode->i_ino + EXOFS_OBJ_OFF));
1037
make_bad_inode(inode);
1039
set_obj_created(oi);
1041
atomic_dec(&inode->i_count);
1046
* Set up a new inode and create an object for it on the OSD
1048
struct inode *exofs_new_inode(struct inode *dir, int mode)
1050
struct super_block *sb;
1051
struct inode *inode;
1052
struct exofs_i_info *oi;
1053
struct exofs_sb_info *sbi;
1054
struct osd_request *or;
1055
struct osd_obj_id obj;
1059
inode = new_inode(sb);
1061
return ERR_PTR(-ENOMEM);
1063
oi = exofs_i(inode);
1065
init_waitqueue_head(&oi->i_wq);
1066
set_obj_2bcreated(oi);
1068
sbi = sb->s_fs_info;
1071
inode->i_uid = current->cred->fsuid;
1072
if (dir->i_mode & S_ISGID) {
1073
inode->i_gid = dir->i_gid;
1077
inode->i_gid = current->cred->fsgid;
1079
inode->i_mode = mode;
1081
inode->i_ino = sbi->s_nextid++;
1082
inode->i_blkbits = EXOFS_BLKSHIFT;
1083
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
1084
oi->i_commit_size = inode->i_size = 0;
1085
spin_lock(&sbi->s_next_gen_lock);
1086
inode->i_generation = sbi->s_next_generation++;
1087
spin_unlock(&sbi->s_next_gen_lock);
1088
insert_inode_hash(inode);
1090
mark_inode_dirty(inode);
1092
obj.partition = sbi->s_pid;
1093
obj.id = inode->i_ino + EXOFS_OBJ_OFF;
1094
exofs_make_credential(oi->i_cred, &obj);
1096
or = osd_start_request(sbi->s_dev, GFP_KERNEL);
1097
if (unlikely(!or)) {
1098
EXOFS_ERR("exofs_new_inode: osd_start_request failed\n");
1099
return ERR_PTR(-ENOMEM);
1102
osd_req_create_object(or, &obj);
1104
/* increment the refcount so that the inode will still be around when we
1105
* reach the callback
1107
atomic_inc(&inode->i_count);
1109
ret = exofs_async_op(or, create_done, inode, oi->i_cred);
1111
atomic_dec(&inode->i_count);
1112
osd_end_request(or);
1113
return ERR_PTR(-EIO);
1115
atomic_inc(&sbi->s_curr_pending);
1121
* struct to pass two arguments to update_inode's callback
1123
struct updatei_args {
1124
struct exofs_sb_info *sbi;
1125
struct exofs_fcb fcb;
1129
* Callback function from exofs_update_inode().
1131
static void updatei_done(struct osd_request *or, void *p)
1133
struct updatei_args *args = p;
1135
osd_end_request(or);
1137
atomic_dec(&args->sbi->s_curr_pending);
1143
* Write the inode to the OSD. Just fill up the struct, and set the attribute
1144
* synchronously or asynchronously depending on the do_sync flag.
1146
static int exofs_update_inode(struct inode *inode, int do_sync)
1148
struct exofs_i_info *oi = exofs_i(inode);
1149
struct super_block *sb = inode->i_sb;
1150
struct exofs_sb_info *sbi = sb->s_fs_info;
1151
struct osd_obj_id obj = {sbi->s_pid, inode->i_ino + EXOFS_OBJ_OFF};
1152
struct osd_request *or;
1153
struct osd_attr attr;
1154
struct exofs_fcb *fcb;
1155
struct updatei_args *args;
1158
args = kzalloc(sizeof(*args), GFP_KERNEL);
1164
fcb->i_mode = cpu_to_le16(inode->i_mode);
1165
fcb->i_uid = cpu_to_le32(inode->i_uid);
1166
fcb->i_gid = cpu_to_le32(inode->i_gid);
1167
fcb->i_links_count = cpu_to_le16(inode->i_nlink);
1168
fcb->i_ctime = cpu_to_le32(inode->i_ctime.tv_sec);
1169
fcb->i_atime = cpu_to_le32(inode->i_atime.tv_sec);
1170
fcb->i_mtime = cpu_to_le32(inode->i_mtime.tv_sec);
1171
oi->i_commit_size = i_size_read(inode);
1172
fcb->i_size = cpu_to_le64(oi->i_commit_size);
1173
fcb->i_generation = cpu_to_le32(inode->i_generation);
1175
if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
1176
if (old_valid_dev(inode->i_rdev)) {
1178
cpu_to_le32(old_encode_dev(inode->i_rdev));
1183
cpu_to_le32(new_encode_dev(inode->i_rdev));
1187
memcpy(fcb->i_data, oi->i_data, sizeof(fcb->i_data));
1189
or = osd_start_request(sbi->s_dev, GFP_KERNEL);
1190
if (unlikely(!or)) {
1191
EXOFS_ERR("exofs_update_inode: osd_start_request failed.\n");
1196
osd_req_set_attributes(or, &obj);
1198
attr = g_attr_inode_data;
1200
osd_req_add_set_attr_list(or, &attr, 1);
1202
if (!obj_created(oi)) {
1203
EXOFS_DBGMSG("!obj_created\n");
1204
BUG_ON(!obj_2bcreated(oi));
1205
wait_event(oi->i_wq, obj_created(oi));
1206
EXOFS_DBGMSG("wait_event done\n");
1210
ret = exofs_sync_op(or, sbi->s_timeout, oi->i_cred);
1211
osd_end_request(or);
1216
ret = exofs_async_op(or, updatei_done, args, oi->i_cred);
1218
osd_end_request(or);
1221
atomic_inc(&sbi->s_curr_pending);
1222
goto out; /* deallocation in updatei_done */
1228
EXOFS_DBGMSG("ret=>%d\n", ret);
1232
int exofs_write_inode(struct inode *inode, int wait)
1234
return exofs_update_inode(inode, wait);
1238
* Callback function from exofs_delete_inode() - don't have much cleaning up to
1241
static void delete_done(struct osd_request *or, void *p)
1243
struct exofs_sb_info *sbi;
1244
osd_end_request(or);
1246
atomic_dec(&sbi->s_curr_pending);
1250
* Called when the refcount of an inode reaches zero. We remove the object
1251
* from the OSD here. We make sure the object was created before we try and
1254
void exofs_delete_inode(struct inode *inode)
1256
struct exofs_i_info *oi = exofs_i(inode);
1257
struct super_block *sb = inode->i_sb;
1258
struct exofs_sb_info *sbi = sb->s_fs_info;
1259
struct osd_obj_id obj = {sbi->s_pid, inode->i_ino + EXOFS_OBJ_OFF};
1260
struct osd_request *or;
1263
truncate_inode_pages(&inode->i_data, 0);
1265
if (is_bad_inode(inode))
1268
mark_inode_dirty(inode);
1269
exofs_update_inode(inode, inode_needs_sync(inode));
1272
if (inode->i_blocks)
1273
exofs_truncate(inode);
1277
or = osd_start_request(sbi->s_dev, GFP_KERNEL);
1278
if (unlikely(!or)) {
1279
EXOFS_ERR("exofs_delete_inode: osd_start_request failed\n");
1283
osd_req_remove_object(or, &obj);
1285
/* if we are deleting an obj that hasn't been created yet, wait */
1286
if (!obj_created(oi)) {
1287
BUG_ON(!obj_2bcreated(oi));
1288
wait_event(oi->i_wq, obj_created(oi));
1291
ret = exofs_async_op(or, delete_done, sbi, oi->i_cred);
1294
"ERROR: @exofs_delete_inode exofs_async_op failed\n");
1295
osd_end_request(or);
1298
atomic_inc(&sbi->s_curr_pending);
added
removed
fs/exofs/inode.c
