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Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-fixes 

* git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-fixes:
  GFS2: filesystem hang caused by incorrect lock order
  GFS2: Don't try to deallocate unlinked inodes when mounted ro
  GFS2: directly write blocks past i_size
  GFS2: write_end error path fails to unlock transaction lock
This commit is contained in:
Linus Torvalds 2011-04-19 10:52:51 -07:00
parent f0e615c3cb 44ad37d69b
commit f28c6179e5
9 changed files with 111 additions and 34 deletions
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2
fs/gfs2/aops.c
View File

@ -884,8 +884,8 @@ static int gfs2_write_end(struct file *file, struct address_space *mapping,
}
brelse(dibh);
gfs2_trans_end(sdp);
failed:
gfs2_trans_end(sdp);
if (al) {
gfs2_inplace_release(ip);
gfs2_quota_unlock(ip);

2
fs/gfs2/dir.c
View File

@ -1506,7 +1506,7 @@ struct inode *gfs2_dir_search(struct inode *dir, const struct qstr *name)
inode = gfs2_inode_lookup(dir->i_sb,
be16_to_cpu(dent->de_type),
be64_to_cpu(dent->de_inum.no_addr),
be64_to_cpu(dent->de_inum.no_formal_ino));
be64_to_cpu(dent->de_inum.no_formal_ino), 0);
brelse(bh);
return inode;
}

58
fs/gfs2/file.c
View File

@ -617,18 +617,51 @@ static ssize_t gfs2_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
return generic_file_aio_write(iocb, iov, nr_segs, pos);
}
static void empty_write_end(struct page *page, unsigned from,
unsigned to)
static int empty_write_end(struct page *page, unsigned from,
unsigned to, int mode)
{
struct gfs2_inode *ip = GFS2_I(page->mapping->host);
struct inode *inode = page->mapping->host;
struct gfs2_inode *ip = GFS2_I(inode);
struct buffer_head *bh;
unsigned offset, blksize = 1 << inode->i_blkbits;
pgoff_t end_index = i_size_read(inode) >> PAGE_CACHE_SHIFT;
zero_user(page, from, to-from);
mark_page_accessed(page);
if (!gfs2_is_writeback(ip))
gfs2_page_add_databufs(ip, page, from, to);
if (page->index < end_index || !(mode & FALLOC_FL_KEEP_SIZE)) {
if (!gfs2_is_writeback(ip))
gfs2_page_add_databufs(ip, page, from, to);
block_commit_write(page, from, to);
block_commit_write(page, from, to);
return 0;
}
offset = 0;
bh = page_buffers(page);
while (offset < to) {
if (offset >= from) {
set_buffer_uptodate(bh);
mark_buffer_dirty(bh);
clear_buffer_new(bh);
write_dirty_buffer(bh, WRITE);
}
offset += blksize;
bh = bh->b_this_page;
}
offset = 0;
bh = page_buffers(page);
while (offset < to) {
if (offset >= from) {
wait_on_buffer(bh);
if (!buffer_uptodate(bh))
return -EIO;
}
offset += blksize;
bh = bh->b_this_page;
}
return 0;
}
static int needs_empty_write(sector_t block, struct inode *inode)
@ -643,7 +676,8 @@ static int needs_empty_write(sector_t block, struct inode *inode)
return !buffer_mapped(&bh_map);
}
static int write_empty_blocks(struct page *page, unsigned from, unsigned to)
static int write_empty_blocks(struct page *page, unsigned from, unsigned to,
int mode)
{
struct inode *inode = page->mapping->host;
unsigned start, end, next, blksize;
@ -668,7 +702,9 @@ static int write_empty_blocks(struct page *page, unsigned from, unsigned to)
gfs2_block_map);
if (unlikely(ret))
return ret;
empty_write_end(page, start, end);
ret = empty_write_end(page, start, end, mode);
if (unlikely(ret))
return ret;
end = 0;
}
start = next;
@ -682,7 +718,9 @@ static int write_empty_blocks(struct page *page, unsigned from, unsigned to)
ret = __block_write_begin(page, start, end - start, gfs2_block_map);
if (unlikely(ret))
return ret;
empty_write_end(page, start, end);
ret = empty_write_end(page, start, end, mode);
if (unlikely(ret))
return ret;
}
return 0;
@ -731,7 +769,7 @@ static int fallocate_chunk(struct inode *inode, loff_t offset, loff_t len,
if (curr == end)
to = end_offset;
error = write_empty_blocks(page, from, to);
error = write_empty_blocks(page, from, to, mode);
if (!error && offset + to > inode->i_size &&
!(mode & FALLOC_FL_KEEP_SIZE)) {
i_size_write(inode, offset + to);

4
fs/gfs2/glops.c
View File

@ -385,6 +385,10 @@ static int trans_go_demote_ok(const struct gfs2_glock *gl)
static void iopen_go_callback(struct gfs2_glock *gl)
{
struct gfs2_inode *ip = (struct gfs2_inode *)gl->gl_object;
struct gfs2_sbd *sdp = gl->gl_sbd;
if (sdp->sd_vfs->s_flags & MS_RDONLY)
return;
if (gl->gl_demote_state == LM_ST_UNLOCKED &&
gl->gl_state == LM_ST_SHARED && ip) {

56
fs/gfs2/inode.c
View File

@ -40,37 +40,61 @@ struct gfs2_inum_range_host {
u64 ir_length;
};
struct gfs2_skip_data {
u64 no_addr;
int skipped;
int non_block;
};
static int iget_test(struct inode *inode, void *opaque)
{
struct gfs2_inode *ip = GFS2_I(inode);
u64 *no_addr = opaque;
struct gfs2_skip_data *data = opaque;
if (ip->i_no_addr == *no_addr)
if (ip->i_no_addr == data->no_addr) {
if (data->non_block &&
inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE)) {
data->skipped = 1;
return 0;
}
return 1;
}
return 0;
}
static int iget_set(struct inode *inode, void *opaque)
{
struct gfs2_inode *ip = GFS2_I(inode);
u64 *no_addr = opaque;
struct gfs2_skip_data *data = opaque;
inode->i_ino = (unsigned long)*no_addr;
ip->i_no_addr = *no_addr;
if (data->skipped)
return -ENOENT;
inode->i_ino = (unsigned long)(data->no_addr);
ip->i_no_addr = data->no_addr;
return 0;
}
struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr)
{
unsigned long hash = (unsigned long)no_addr;
return ilookup5(sb, hash, iget_test, &no_addr);
struct gfs2_skip_data data;
data.no_addr = no_addr;
data.skipped = 0;
data.non_block = 0;
return ilookup5(sb, hash, iget_test, &data);
}
static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr)
static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr,
int non_block)
{
struct gfs2_skip_data data;
unsigned long hash = (unsigned long)no_addr;
return iget5_locked(sb, hash, iget_test, iget_set, &no_addr);
data.no_addr = no_addr;
data.skipped = 0;
data.non_block = non_block;
return iget5_locked(sb, hash, iget_test, iget_set, &data);
}
/**
@ -111,19 +135,20 @@ static void gfs2_set_iop(struct inode *inode)
* @sb: The super block
* @no_addr: The inode number
* @type: The type of the inode
* non_block: Can we block on inodes that are being freed?
*
* Returns: A VFS inode, or an error
*/
struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
u64 no_addr, u64 no_formal_ino)
u64 no_addr, u64 no_formal_ino, int non_block)
{
struct inode *inode;
struct gfs2_inode *ip;
struct gfs2_glock *io_gl = NULL;
int error;
inode = gfs2_iget(sb, no_addr);
inode = gfs2_iget(sb, no_addr, non_block);
ip = GFS2_I(inode);
if (!inode)
@ -185,11 +210,12 @@ struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr,
{
struct super_block *sb = sdp->sd_vfs;
struct gfs2_holder i_gh;
struct inode *inode;
struct inode *inode = NULL;
int error;
/* Must not read in block until block type is verified */
error = gfs2_glock_nq_num(sdp, no_addr, &gfs2_inode_glops,
LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
LM_ST_EXCLUSIVE, GL_SKIP, &i_gh);
if (error)
return ERR_PTR(error);
@ -197,7 +223,7 @@ struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr,
if (error)
goto fail;
inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0);
inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0, 1);
if (IS_ERR(inode))
goto fail;
@ -843,7 +869,7 @@ struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
goto fail_gunlock2;
inode = gfs2_inode_lookup(dir->i_sb, IF2DT(mode), inum.no_addr,
inum.no_formal_ino);
inum.no_formal_ino, 0);
if (IS_ERR(inode))
goto fail_gunlock2;

3
fs/gfs2/inode.h
View File

@ -97,7 +97,8 @@ static inline int gfs2_check_internal_file_size(struct inode *inode,
}
extern struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned type,
u64 no_addr, u64 no_formal_ino);
u64 no_addr, u64 no_formal_ino,
int non_block);
extern struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr,
u64 *no_formal_ino,
unsigned int blktype);

2
fs/gfs2/ops_fstype.c
View File

@ -430,7 +430,7 @@ static int gfs2_lookup_root(struct super_block *sb, struct dentry **dptr,
struct dentry *dentry;
struct inode *inode;
inode = gfs2_inode_lookup(sb, DT_DIR, no_addr, 0);
inode = gfs2_inode_lookup(sb, DT_DIR, no_addr, 0, 0);
if (IS_ERR(inode)) {
fs_err(sdp, "can't read in %s inode: %ld\n", name, PTR_ERR(inode));
return PTR_ERR(inode);

4
fs/gfs2/rgrp.c
View File

@ -945,7 +945,7 @@ static void try_rgrp_unlink(struct gfs2_rgrpd *rgd, u64 *last_unlinked, u64 skip
/* rgblk_search can return a block < goal, so we need to
keep it marching forward. */
no_addr = block + rgd->rd_data0;
goal++;
goal = max(block + 1, goal + 1);
if (*last_unlinked != NO_BLOCK && no_addr <= *last_unlinked)
continue;
if (no_addr == skip)
@ -971,7 +971,7 @@ static void try_rgrp_unlink(struct gfs2_rgrpd *rgd, u64 *last_unlinked, u64 skip
found++;
/* Limit reclaim to sensible number of tasks */
if (found > 2*NR_CPUS)
if (found > NR_CPUS)
return;
}

14
fs/gfs2/super.c
View File

@ -1318,15 +1318,17 @@ static int gfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
static void gfs2_evict_inode(struct inode *inode)
{
struct gfs2_sbd *sdp = inode->i_sb->s_fs_info;
struct super_block *sb = inode->i_sb;
struct gfs2_sbd *sdp = sb->s_fs_info;
struct gfs2_inode *ip = GFS2_I(inode);
struct gfs2_holder gh;
int error;
if (inode->i_nlink)
if (inode->i_nlink || (sb->s_flags & MS_RDONLY))
goto out;
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
/* Must not read inode block until block type has been verified */
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, &gh);
if (unlikely(error)) {
gfs2_glock_dq_uninit(&ip->i_iopen_gh);
goto out;
@ -1336,6 +1338,12 @@ static void gfs2_evict_inode(struct inode *inode)
if (error)
goto out_truncate;
if (test_bit(GIF_INVALID, &ip->i_flags)) {
error = gfs2_inode_refresh(ip);
if (error)
goto out_truncate;
}
ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
gfs2_glock_dq_wait(&ip->i_iopen_gh);
gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | GL_NOCACHE, &ip->i_iopen_gh);