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ocfs2: Remember rw lock level during direct io

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Cluster locking might have been redone because a direct write won't
complete, so this needs to be reflected in the iocb.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
This commit is contained in:
Mark Fasheh 2007-04-16 17:28:51 -07:00
parent 8110b073a9
commit 7cdfc3a1c3
3 changed files with 19 additions and 7 deletions
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9
fs/ocfs2/aops.c
View File

@ -522,12 +522,17 @@ static void ocfs2_dio_end_io(struct kiocb *iocb,
void *private)
{
struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
int level;
/* this io's submitter should not have unlocked this before we could */
BUG_ON(!ocfs2_iocb_is_rw_locked(iocb));
ocfs2_iocb_clear_rw_locked(iocb);
up_read(&inode->i_alloc_sem);
ocfs2_rw_unlock(inode, 0);
level = ocfs2_iocb_rw_locked_level(iocb);
if (!level)
up_read(&inode->i_alloc_sem);
ocfs2_rw_unlock(inode, level);
}
/*

13
fs/ocfs2/aops.h
View File

@ -97,9 +97,16 @@ int ocfs2_map_and_write_splice_data(struct inode *inode,
/* all ocfs2_dio_end_io()'s fault */
#define ocfs2_iocb_is_rw_locked(iocb) \
test_bit(0, (unsigned long *)&iocb->private)
#define ocfs2_iocb_set_rw_locked(iocb) \
set_bit(0, (unsigned long *)&iocb->private)
static inline void ocfs2_iocb_set_rw_locked(struct kiocb *iocb, int level)
{
set_bit(0, (unsigned long *)&iocb->private);
if (level)
set_bit(1, (unsigned long *)&iocb->private);
else
clear_bit(1, (unsigned long *)&iocb->private);
}
#define ocfs2_iocb_clear_rw_locked(iocb) \
clear_bit(0, (unsigned long *)&iocb->private)
#define ocfs2_iocb_rw_locked_level(iocb) \
test_bit(1, (unsigned long *)&iocb->private)
#endif /* OCFS2_FILE_H */

4
fs/ocfs2/file.c
View File

@ -1542,7 +1542,7 @@ relock:
pos = *ppos;
/* communicate with ocfs2_dio_end_io */
ocfs2_iocb_set_rw_locked(iocb);
ocfs2_iocb_set_rw_locked(iocb, rw_level);
if (direct_io) {
written = generic_file_direct_write(iocb, iov, &nr_segs, *ppos,
@ -1788,7 +1788,7 @@ static ssize_t ocfs2_file_aio_read(struct kiocb *iocb,
}
rw_level = 0;
/* communicate with ocfs2_dio_end_io */
ocfs2_iocb_set_rw_locked(iocb);
ocfs2_iocb_set_rw_locked(iocb, rw_level);
}
/*