ocfs2: Take the inode out of the metadata read/write paths.
We are really passing the inode into the ocfs2_read/write_blocks()
functions to get at the metadata cache. This commit passes the cache
directly into the metadata block functions, divorcing them from the
inode.
Signed-off-by: Joel Becker <joel.becker@oracle.com>
diff --git a/fs/ocfs2/buffer_head_io.c b/fs/ocfs2/buffer_head_io.c
index 15c8e6d..d43d34a 100644
--- a/fs/ocfs2/buffer_head_io.c
+++ b/fs/ocfs2/buffer_head_io.c
@@ -52,12 +52,12 @@
BUFFER_FNS(NeedsValidate, needs_validate);
int ocfs2_write_block(struct ocfs2_super *osb, struct buffer_head *bh,
- struct inode *inode)
+ struct ocfs2_caching_info *ci)
{
int ret = 0;
- mlog_entry("(bh->b_blocknr = %llu, inode=%p)\n",
- (unsigned long long)bh->b_blocknr, inode);
+ mlog_entry("(bh->b_blocknr = %llu, ci=%p)\n",
+ (unsigned long long)bh->b_blocknr, ci);
BUG_ON(bh->b_blocknr < OCFS2_SUPER_BLOCK_BLKNO);
BUG_ON(buffer_jbd(bh));
@@ -70,7 +70,7 @@
goto out;
}
- mutex_lock(&OCFS2_I(inode)->ip_io_mutex);
+ ocfs2_metadata_cache_io_lock(ci);
lock_buffer(bh);
set_buffer_uptodate(bh);
@@ -85,7 +85,7 @@
wait_on_buffer(bh);
if (buffer_uptodate(bh)) {
- ocfs2_set_buffer_uptodate(inode, bh);
+ ocfs2_set_buffer_uptodate(ci, bh);
} else {
/* We don't need to remove the clustered uptodate
* information for this bh as it's not marked locally
@@ -94,7 +94,7 @@
put_bh(bh);
}
- mutex_unlock(&OCFS2_I(inode)->ip_io_mutex);
+ ocfs2_metadata_cache_io_unlock(ci);
out:
mlog_exit(ret);
return ret;
@@ -177,7 +177,7 @@
return status;
}
-int ocfs2_read_blocks(struct inode *inode, u64 block, int nr,
+int ocfs2_read_blocks(struct ocfs2_caching_info *ci, u64 block, int nr,
struct buffer_head *bhs[], int flags,
int (*validate)(struct super_block *sb,
struct buffer_head *bh))
@@ -185,11 +185,12 @@
int status = 0;
int i, ignore_cache = 0;
struct buffer_head *bh;
+ struct super_block *sb = ocfs2_metadata_cache_get_super(ci);
- mlog_entry("(inode=%p, block=(%llu), nr=(%d), flags=%d)\n",
- inode, (unsigned long long)block, nr, flags);
+ mlog_entry("(ci=%p, block=(%llu), nr=(%d), flags=%d)\n",
+ ci, (unsigned long long)block, nr, flags);
- BUG_ON(!inode);
+ BUG_ON(!ci);
BUG_ON((flags & OCFS2_BH_READAHEAD) &&
(flags & OCFS2_BH_IGNORE_CACHE));
@@ -212,12 +213,12 @@
goto bail;
}
- mutex_lock(&OCFS2_I(inode)->ip_io_mutex);
+ ocfs2_metadata_cache_io_lock(ci);
for (i = 0 ; i < nr ; i++) {
if (bhs[i] == NULL) {
- bhs[i] = sb_getblk(inode->i_sb, block++);
+ bhs[i] = sb_getblk(sb, block++);
if (bhs[i] == NULL) {
- mutex_unlock(&OCFS2_I(inode)->ip_io_mutex);
+ ocfs2_metadata_cache_io_unlock(ci);
status = -EIO;
mlog_errno(status);
goto bail;
@@ -250,11 +251,11 @@
* before our is-it-in-flight check.
*/
- if (!ignore_cache && !ocfs2_buffer_uptodate(inode, bh)) {
+ if (!ignore_cache && !ocfs2_buffer_uptodate(ci, bh)) {
mlog(ML_UPTODATE,
- "bh (%llu), inode %llu not uptodate\n",
+ "bh (%llu), owner %llu not uptodate\n",
(unsigned long long)bh->b_blocknr,
- (unsigned long long)OCFS2_I(inode)->ip_blkno);
+ (unsigned long long)ocfs2_metadata_cache_owner(ci));
/* We're using ignore_cache here to say
* "go to disk" */
ignore_cache = 1;
@@ -283,7 +284,7 @@
* previously submitted request than we are
* done here. */
if ((flags & OCFS2_BH_READAHEAD)
- && ocfs2_buffer_read_ahead(inode, bh))
+ && ocfs2_buffer_read_ahead(ci, bh))
continue;
lock_buffer(bh);
@@ -305,7 +306,7 @@
* buffer lock. */
if (!(flags & OCFS2_BH_IGNORE_CACHE)
&& !(flags & OCFS2_BH_READAHEAD)
- && ocfs2_buffer_uptodate(inode, bh)) {
+ && ocfs2_buffer_uptodate(ci, bh)) {
unlock_buffer(bh);
continue;
}
@@ -327,7 +328,7 @@
if (!(flags & OCFS2_BH_READAHEAD)) {
/* We know this can't have changed as we hold the
- * inode sem. Avoid doing any work on the bh if the
+ * owner sem. Avoid doing any work on the bh if the
* journal has it. */
if (!buffer_jbd(bh))
wait_on_buffer(bh);
@@ -351,7 +352,7 @@
* that better not have changed */
BUG_ON(buffer_jbd(bh));
clear_buffer_needs_validate(bh);
- status = validate(inode->i_sb, bh);
+ status = validate(sb, bh);
if (status) {
put_bh(bh);
bhs[i] = NULL;
@@ -363,9 +364,9 @@
/* Always set the buffer in the cache, even if it was
* a forced read, or read-ahead which hasn't yet
* completed. */
- ocfs2_set_buffer_uptodate(inode, bh);
+ ocfs2_set_buffer_uptodate(ci, bh);
}
- mutex_unlock(&OCFS2_I(inode)->ip_io_mutex);
+ ocfs2_metadata_cache_io_unlock(ci);
mlog(ML_BH_IO, "block=(%llu), nr=(%d), cached=%s, flags=0x%x\n",
(unsigned long long)block, nr,
@@ -399,7 +400,7 @@
/*
* Write super block and backups doesn't need to collaborate with journal,
- * so we don't need to lock ip_io_mutex and inode doesn't need to bea passed
+ * so we don't need to lock ip_io_mutex and ci doesn't need to bea passed
* into this function.
*/
int ocfs2_write_super_or_backup(struct ocfs2_super *osb,