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Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6

Browse Source 
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6:
  jbd: change the field "b_cow_tid" of struct journal_head from type unsigned to tid_t
  ext3.txt: update the links in the section "useful links" to the latest ones
  ext3: Fix data corruption in inodes with journalled data
  ext2: check xattr name_len before acquiring xattr_sem in ext2_xattr_get
  ext3: Fix compilation with -DDX_DEBUG
  quota: Remove unused declaration
  jbd: Use WRITE_SYNC in journal checkpoint.
  jbd: Fix oops in journal_remove_journal_head()
  ext3: Return -EINVAL when start is beyond the end of fs in ext3_trim_fs()
  ext3/ioctl.c: silence sparse warnings about different address spaces
  ext3/ext4 Documentation: remove bh/nobh since it has been deprecated
  ext3: Improve truncate error handling
  ext3: use proper little-endian bitops
  ext2: include fs.h into ext2_fs.h
  ext3: Fix oops in ext3_try_to_allocate_with_rsv()
  jbd: fix a bug of leaking jh->b_jcount
  jbd: remove dependency on __GFP_NOFAIL
  ext3: Convert ext3 to new truncate calling convention
  jbd: Add fixed tracepoints
  ext3: Add fixed tracepoints

Resolve conflicts in fs/ext3/fsync.c due to fsync locking push-down and
new fixed tracepoints.
This commit is contained in:
Linus Torvalds
2011-07-26 11:34:40 -07:00
parent fa8f53ace4 5cf49d763e
commit 2ac232f37f
23 changed files with 1419 additions and 270 deletions
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193
fs/ext3/inode.c
View File

@ -38,10 +38,12 @@
#include <linux/bio.h>
#include <linux/fiemap.h>
#include <linux/namei.h>
#include <trace/events/ext3.h>
#include "xattr.h"
#include "acl.h"
static int ext3_writepage_trans_blocks(struct inode *inode);
static int ext3_block_truncate_page(struct inode *inode, loff_t from);
/*
* Test whether an inode is a fast symlink.
@ -70,6 +72,7 @@ int ext3_forget(handle_t *handle, int is_metadata, struct inode *inode,
might_sleep();
trace_ext3_forget(inode, is_metadata, blocknr);
BUFFER_TRACE(bh, "enter");
jbd_debug(4, "forgetting bh %p: is_metadata = %d, mode %o, "
@ -194,20 +197,47 @@ static int truncate_restart_transaction(handle_t *handle, struct inode *inode)
*/
void ext3_evict_inode (struct inode *inode)
{
struct ext3_inode_info *ei = EXT3_I(inode);
struct ext3_block_alloc_info *rsv;
handle_t *handle;
int want_delete = 0;
trace_ext3_evict_inode(inode);
if (!inode->i_nlink && !is_bad_inode(inode)) {
dquot_initialize(inode);
want_delete = 1;
}
/*
* When journalling data dirty buffers are tracked only in the journal.
* So although mm thinks everything is clean and ready for reaping the
* inode might still have some pages to write in the running
* transaction or waiting to be checkpointed. Thus calling
* journal_invalidatepage() (via truncate_inode_pages()) to discard
* these buffers can cause data loss. Also even if we did not discard
* these buffers, we would have no way to find them after the inode
* is reaped and thus user could see stale data if he tries to read
* them before the transaction is checkpointed. So be careful and
* force everything to disk here... We use ei->i_datasync_tid to
* store the newest transaction containing inode's data.
*
* Note that directories do not have this problem because they don't
* use page cache.
*/
if (inode->i_nlink && ext3_should_journal_data(inode) &&
(S_ISLNK(inode->i_mode) || S_ISREG(inode->i_mode))) {
tid_t commit_tid = atomic_read(&ei->i_datasync_tid);
journal_t *journal = EXT3_SB(inode->i_sb)->s_journal;
log_start_commit(journal, commit_tid);
log_wait_commit(journal, commit_tid);
filemap_write_and_wait(&inode->i_data);
}
truncate_inode_pages(&inode->i_data, 0);
ext3_discard_reservation(inode);
rsv = EXT3_I(inode)->i_block_alloc_info;
EXT3_I(inode)->i_block_alloc_info = NULL;
rsv = ei->i_block_alloc_info;
ei->i_block_alloc_info = NULL;
if (unlikely(rsv))
kfree(rsv);
@ -231,15 +261,13 @@ void ext3_evict_inode (struct inode *inode)
if (inode->i_blocks)
ext3_truncate(inode);
/*
* Kill off the orphan record which ext3_truncate created.
* AKPM: I think this can be inside the above `if'.
* Note that ext3_orphan_del() has to be able to cope with the
* deletion of a non-existent orphan - this is because we don't
* know if ext3_truncate() actually created an orphan record.
* (Well, we could do this if we need to, but heck - it works)
* Kill off the orphan record created when the inode lost the last
* link. Note that ext3_orphan_del() has to be able to cope with the
* deletion of a non-existent orphan - ext3_truncate() could
* have removed the record.
*/
ext3_orphan_del(handle, inode);
EXT3_I(inode)->i_dtime = get_seconds();
ei->i_dtime = get_seconds();
/*
* One subtle ordering requirement: if anything has gone wrong
@ -842,6 +870,7 @@ int ext3_get_blocks_handle(handle_t *handle, struct inode *inode,
ext3_fsblk_t first_block = 0;
trace_ext3_get_blocks_enter(inode, iblock, maxblocks, create);
J_ASSERT(handle != NULL || create == 0);
depth = ext3_block_to_path(inode,iblock,offsets,&blocks_to_boundary);
@ -886,6 +915,9 @@ int ext3_get_blocks_handle(handle_t *handle, struct inode *inode,
if (!create || err == -EIO)
goto cleanup;
/*
* Block out ext3_truncate while we alter the tree
*/
mutex_lock(&ei->truncate_mutex);
/*
@ -934,9 +966,6 @@ int ext3_get_blocks_handle(handle_t *handle, struct inode *inode,
*/
count = ext3_blks_to_allocate(partial, indirect_blks,
maxblocks, blocks_to_boundary);
/*
* Block out ext3_truncate while we alter the tree
*/
err = ext3_alloc_branch(handle, inode, indirect_blks, &count, goal,
offsets + (partial - chain), partial);
@ -970,6 +999,9 @@ cleanup:
}
BUFFER_TRACE(bh_result, "returned");
out:
trace_ext3_get_blocks_exit(inode, iblock,
depth ? le32_to_cpu(chain[depth-1].key) : 0,
count, err);
return err;
}
@ -1202,6 +1234,16 @@ static void ext3_truncate_failed_write(struct inode *inode)
ext3_truncate(inode);
}
/*
* Truncate blocks that were not used by direct IO write. We have to zero out
* the last file block as well because direct IO might have written to it.
*/
static void ext3_truncate_failed_direct_write(struct inode *inode)
{
ext3_block_truncate_page(inode, inode->i_size);
ext3_truncate(inode);
}
static int ext3_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
@ -1217,6 +1259,8 @@ static int ext3_write_begin(struct file *file, struct address_space *mapping,
* we allocate blocks but write fails for some reason */
int needed_blocks = ext3_writepage_trans_blocks(inode) + 1;
trace_ext3_write_begin(inode, pos, len, flags);
index = pos >> PAGE_CACHE_SHIFT;
from = pos & (PAGE_CACHE_SIZE - 1);
to = from + len;
@ -1332,6 +1376,7 @@ static int ext3_ordered_write_end(struct file *file,
unsigned from, to;
int ret = 0, ret2;
trace_ext3_ordered_write_end(inode, pos, len, copied);
copied = block_write_end(file, mapping, pos, len, copied, page, fsdata);
from = pos & (PAGE_CACHE_SIZE - 1);
@ -1367,6 +1412,7 @@ static int ext3_writeback_write_end(struct file *file,
struct inode *inode = file->f_mapping->host;
int ret;
trace_ext3_writeback_write_end(inode, pos, len, copied);
copied = block_write_end(file, mapping, pos, len, copied, page, fsdata);
update_file_sizes(inode, pos, copied);
/*
@ -1391,10 +1437,12 @@ static int ext3_journalled_write_end(struct file *file,
{
handle_t *handle = ext3_journal_current_handle();
struct inode *inode = mapping->host;
struct ext3_inode_info *ei = EXT3_I(inode);
int ret = 0, ret2;
int partial = 0;
unsigned from, to;
trace_ext3_journalled_write_end(inode, pos, len, copied);
from = pos & (PAGE_CACHE_SIZE - 1);
to = from + len;
@ -1419,8 +1467,9 @@ static int ext3_journalled_write_end(struct file *file,
if (pos + len > inode->i_size && ext3_can_truncate(inode))
ext3_orphan_add(handle, inode);
ext3_set_inode_state(inode, EXT3_STATE_JDATA);
if (inode->i_size > EXT3_I(inode)->i_disksize) {
EXT3_I(inode)->i_disksize = inode->i_size;
atomic_set(&ei->i_datasync_tid, handle->h_transaction->t_tid);
if (inode->i_size > ei->i_disksize) {
ei->i_disksize = inode->i_size;
ret2 = ext3_mark_inode_dirty(handle, inode);
if (!ret)
ret = ret2;
@ -1577,6 +1626,7 @@ static int ext3_ordered_writepage(struct page *page,
if (ext3_journal_current_handle())
goto out_fail;
trace_ext3_ordered_writepage(page);
if (!page_has_buffers(page)) {
create_empty_buffers(page, inode->i_sb->s_blocksize,
(1 << BH_Dirty)|(1 << BH_Uptodate));
@ -1647,6 +1697,7 @@ static int ext3_writeback_writepage(struct page *page,
if (ext3_journal_current_handle())
goto out_fail;
trace_ext3_writeback_writepage(page);
if (page_has_buffers(page)) {
if (!walk_page_buffers(NULL, page_buffers(page), 0,
PAGE_CACHE_SIZE, NULL, buffer_unmapped)) {
@ -1689,6 +1740,7 @@ static int ext3_journalled_writepage(struct page *page,
if (ext3_journal_current_handle())
goto no_write;
trace_ext3_journalled_writepage(page);
handle = ext3_journal_start(inode, ext3_writepage_trans_blocks(inode));
if (IS_ERR(handle)) {
ret = PTR_ERR(handle);
@ -1715,6 +1767,8 @@ static int ext3_journalled_writepage(struct page *page,
if (ret == 0)
ret = err;
ext3_set_inode_state(inode, EXT3_STATE_JDATA);
atomic_set(&EXT3_I(inode)->i_datasync_tid,
handle->h_transaction->t_tid);
unlock_page(page);
} else {
/*
@ -1739,6 +1793,7 @@ out_unlock:
static int ext3_readpage(struct file *file, struct page *page)
{
trace_ext3_readpage(page);
return mpage_readpage(page, ext3_get_block);
}
@ -1753,6 +1808,8 @@ static void ext3_invalidatepage(struct page *page, unsigned long offset)
{
journal_t *journal = EXT3_JOURNAL(page->mapping->host);
trace_ext3_invalidatepage(page, offset);
/*
* If it's a full truncate we just forget about the pending dirtying
*/
@ -1766,6 +1823,7 @@ static int ext3_releasepage(struct page *page, gfp_t wait)
{
journal_t *journal = EXT3_JOURNAL(page->mapping->host);
trace_ext3_releasepage(page);
WARN_ON(PageChecked(page));
if (!page_has_buffers(page))
return 0;
@ -1794,6 +1852,8 @@ static ssize_t ext3_direct_IO(int rw, struct kiocb *iocb,
size_t count = iov_length(iov, nr_segs);
int retries = 0;
trace_ext3_direct_IO_enter(inode, offset, iov_length(iov, nr_segs), rw);
if (rw == WRITE) {
loff_t final_size = offset + count;
@ -1827,7 +1887,7 @@ retry:
loff_t end = offset + iov_length(iov, nr_segs);
if (end > isize)
vmtruncate(inode, isize);
ext3_truncate_failed_direct_write(inode);
}
if (ret == -ENOSPC && ext3_should_retry_alloc(inode->i_sb, &retries))
goto retry;
@ -1841,7 +1901,7 @@ retry:
/* This is really bad luck. We've written the data
* but cannot extend i_size. Truncate allocated blocks
* and pretend the write failed... */
ext3_truncate(inode);
ext3_truncate_failed_direct_write(inode);
ret = PTR_ERR(handle);
goto out;
}
@ -1867,6 +1927,8 @@ retry:
ret = err;
}
out:
trace_ext3_direct_IO_exit(inode, offset,
iov_length(iov, nr_segs), rw, ret);
return ret;
}
@ -1949,17 +2011,24 @@ void ext3_set_aops(struct inode *inode)
* This required during truncate. We need to physically zero the tail end
* of that block so it doesn't yield old data if the file is later grown.
*/
static int ext3_block_truncate_page(handle_t *handle, struct page *page,
struct address_space *mapping, loff_t from)
static int ext3_block_truncate_page(struct inode *inode, loff_t from)
{
ext3_fsblk_t index = from >> PAGE_CACHE_SHIFT;
unsigned offset = from & (PAGE_CACHE_SIZE-1);
unsigned offset = from & (PAGE_CACHE_SIZE - 1);
unsigned blocksize, iblock, length, pos;
struct inode *inode = mapping->host;
struct page *page;
handle_t *handle = NULL;
struct buffer_head *bh;
int err = 0;
/* Truncated on block boundary - nothing to do */
blocksize = inode->i_sb->s_blocksize;
if ((from & (blocksize - 1)) == 0)
return 0;
page = grab_cache_page(inode->i_mapping, index);
if (!page)
return -ENOMEM;
length = blocksize - (offset & (blocksize - 1));
iblock = index << (PAGE_CACHE_SHIFT - inode->i_sb->s_blocksize_bits);
@ -2004,11 +2073,23 @@ static int ext3_block_truncate_page(handle_t *handle, struct page *page,
goto unlock;
}
/* data=writeback mode doesn't need transaction to zero-out data */
if (!ext3_should_writeback_data(inode)) {
/* We journal at most one block */
handle = ext3_journal_start(inode, 1);
if (IS_ERR(handle)) {
clear_highpage(page);
flush_dcache_page(page);
err = PTR_ERR(handle);
goto unlock;
}
}
if (ext3_should_journal_data(inode)) {
BUFFER_TRACE(bh, "get write access");
err = ext3_journal_get_write_access(handle, bh);
if (err)
goto unlock;
goto stop;
}
zero_user(page, offset, length);
@ -2022,6 +2103,9 @@ static int ext3_block_truncate_page(handle_t *handle, struct page *page,
err = ext3_journal_dirty_data(handle, bh);
mark_buffer_dirty(bh);
}
stop:
if (handle)
ext3_journal_stop(handle);
unlock:
unlock_page(page);
@ -2390,8 +2474,6 @@ static void ext3_free_branches(handle_t *handle, struct inode *inode,
int ext3_can_truncate(struct inode *inode)
{
if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
return 0;
if (S_ISREG(inode->i_mode))
return 1;
if (S_ISDIR(inode->i_mode))
@ -2435,7 +2517,6 @@ void ext3_truncate(struct inode *inode)
struct ext3_inode_info *ei = EXT3_I(inode);
__le32 *i_data = ei->i_data;
int addr_per_block = EXT3_ADDR_PER_BLOCK(inode->i_sb);
struct address_space *mapping = inode->i_mapping;
int offsets[4];
Indirect chain[4];
Indirect *partial;
@ -2443,7 +2524,8 @@ void ext3_truncate(struct inode *inode)
int n;
long last_block;
unsigned blocksize = inode->i_sb->s_blocksize;
struct page *page;
trace_ext3_truncate_enter(inode);
if (!ext3_can_truncate(inode))
goto out_notrans;
@ -2451,37 +2533,12 @@ void ext3_truncate(struct inode *inode)
if (inode->i_size == 0 && ext3_should_writeback_data(inode))
ext3_set_inode_state(inode, EXT3_STATE_FLUSH_ON_CLOSE);
/*
* We have to lock the EOF page here, because lock_page() nests
* outside journal_start().
*/
if ((inode->i_size & (blocksize - 1)) == 0) {
/* Block boundary? Nothing to do */
page = NULL;
} else {
page = grab_cache_page(mapping,
inode->i_size >> PAGE_CACHE_SHIFT);
if (!page)
goto out_notrans;
}
handle = start_transaction(inode);
if (IS_ERR(handle)) {
if (page) {
clear_highpage(page);
flush_dcache_page(page);
unlock_page(page);
page_cache_release(page);
}
if (IS_ERR(handle))
goto out_notrans;
}
last_block = (inode->i_size + blocksize-1)
>> EXT3_BLOCK_SIZE_BITS(inode->i_sb);
if (page)
ext3_block_truncate_page(handle, page, mapping, inode->i_size);
n = ext3_block_to_path(inode, last_block, offsets, NULL);
if (n == 0)
goto out_stop; /* error */
@ -2596,6 +2653,7 @@ out_stop:
ext3_orphan_del(handle, inode);
ext3_journal_stop(handle);
trace_ext3_truncate_exit(inode);
return;
out_notrans:
/*
@ -2604,6 +2662,7 @@ out_notrans:
*/
if (inode->i_nlink)
ext3_orphan_del(NULL, inode);
trace_ext3_truncate_exit(inode);
}
static ext3_fsblk_t ext3_get_inode_block(struct super_block *sb,
@ -2745,6 +2804,7 @@ make_io:
* has in-inode xattrs, or we don't have this inode in memory.
* Read the block from disk.
*/
trace_ext3_load_inode(inode);
get_bh(bh);
bh->b_end_io = end_buffer_read_sync;
submit_bh(READ_META, bh);
@ -3229,18 +3289,36 @@ int ext3_setattr(struct dentry *dentry, struct iattr *attr)
}
error = ext3_orphan_add(handle, inode);
if (error) {
ext3_journal_stop(handle);
goto err_out;
}
EXT3_I(inode)->i_disksize = attr->ia_size;
rc = ext3_mark_inode_dirty(handle, inode);
if (!error)
error = rc;
error = ext3_mark_inode_dirty(handle, inode);
ext3_journal_stop(handle);
if (error) {
/* Some hard fs error must have happened. Bail out. */
ext3_orphan_del(NULL, inode);
goto err_out;
}
rc = ext3_block_truncate_page(inode, attr->ia_size);
if (rc) {
/* Cleanup orphan list and exit */
handle = ext3_journal_start(inode, 3);
if (IS_ERR(handle)) {
ext3_orphan_del(NULL, inode);
goto err_out;
}
ext3_orphan_del(handle, inode);
ext3_journal_stop(handle);
goto err_out;
}
}
if ((attr->ia_valid & ATTR_SIZE) &&
attr->ia_size != i_size_read(inode)) {
rc = vmtruncate(inode, attr->ia_size);
if (rc)
goto err_out;
truncate_setsize(inode, attr->ia_size);
ext3_truncate(inode);
}
setattr_copy(inode, attr);
@ -3374,6 +3452,7 @@ int ext3_mark_inode_dirty(handle_t *handle, struct inode *inode)
int err;
might_sleep();
trace_ext3_mark_inode_dirty(inode, _RET_IP_);
err = ext3_reserve_inode_write(handle, inode, &iloc);
if (!err)
err = ext3_mark_iloc_dirty(handle, inode, &iloc);