#include <linux/spinlock.h>
#include <linux/completion.h>
#include <linux/buffer_head.h>
+#include <linux/blkdev.h>
#include <linux/gfs2_ondisk.h>
#include <linux/crc32.h>
__u16 mp_list[GFS2_MAX_META_HEIGHT];
};
-typedef int (*block_call_t) (struct gfs2_inode *ip, struct buffer_head *dibh,
- struct buffer_head *bh, __be64 *top,
- __be64 *bottom, unsigned int height,
- void *data);
-
struct strip_mine {
int sm_first;
unsigned int sm_height;
return ((__be64 *)(bh->b_data + head_size)) + mp->mp_list[height];
}
+static void gfs2_metapath_ra(struct gfs2_glock *gl,
+ const struct buffer_head *bh, const __be64 *pos)
+{
+ struct buffer_head *rabh;
+ const __be64 *endp = (const __be64 *)(bh->b_data + bh->b_size);
+ const __be64 *t;
+
+ for (t = pos; t < endp; t++) {
+ if (!*t)
+ continue;
+
+ rabh = gfs2_getbuf(gl, be64_to_cpu(*t), CREATE);
+ if (trylock_buffer(rabh)) {
+ if (!buffer_uptodate(rabh)) {
+ rabh->b_end_io = end_buffer_read_sync;
+ submit_bh(READA | REQ_META, rabh);
+ continue;
+ }
+ unlock_buffer(rabh);
+ }
+ brelse(rabh);
+ }
+}
+
/**
* lookup_metapath - Walk the metadata tree to a specific point
* @ip: The inode
{
struct gfs2_inode *ip = GFS2_I(inode);
struct gfs2_sbd *sdp = GFS2_SB(inode);
+ struct super_block *sb = sdp->sd_vfs;
struct buffer_head *dibh = mp->mp_bh[0];
u64 bn, dblock = 0;
unsigned n, i, blks, alloced = 0, iblks = 0, branch_start = 0;
unsigned dblks = 0;
unsigned ptrs_per_blk;
const unsigned end_of_metadata = height - 1;
+ int ret;
int eob = 0;
enum alloc_state state;
__be64 *ptr;
dblock = bn;
while (n-- > 0)
*ptr++ = cpu_to_be64(bn++);
+ if (buffer_zeronew(bh_map)) {
+ ret = sb_issue_zeroout(sb, dblock, dblks,
+ GFP_NOFS);
+ if (ret) {
+ fs_err(sdp,
+ "Failed to zero data buffers\n");
+ clear_buffer_zeronew(bh_map);
+ }
+ }
break;
}
} while ((state != ALLOC_DATA) || !dblock);
return ret;
}
-/**
- * recursive_scan - recursively scan through the end of a file
- * @ip: the inode
- * @dibh: the dinode buffer
- * @mp: the path through the metadata to the point to start
- * @height: the height the recursion is at
- * @block: the indirect block to look at
- * @first: 1 if this is the first block
- * @bc: the call to make for each piece of metadata
- * @data: data opaque to this function to pass to @bc
- *
- * When this is first called @height and @block should be zero and
- * @first should be 1.
- *
- * Returns: errno
- */
-
-static int recursive_scan(struct gfs2_inode *ip, struct buffer_head *dibh,
- struct metapath *mp, unsigned int height,
- u64 block, int first, block_call_t bc,
- void *data)
-{
- struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
- struct buffer_head *bh = NULL;
- __be64 *top, *bottom;
- u64 bn;
- int error;
- int mh_size = sizeof(struct gfs2_meta_header);
-
- if (!height) {
- error = gfs2_meta_inode_buffer(ip, &bh);
- if (error)
- return error;
- dibh = bh;
-
- top = (__be64 *)(bh->b_data + sizeof(struct gfs2_dinode)) + mp->mp_list[0];
- bottom = (__be64 *)(bh->b_data + sizeof(struct gfs2_dinode)) + sdp->sd_diptrs;
- } else {
- error = gfs2_meta_indirect_buffer(ip, height, block, 0, &bh);
- if (error)
- return error;
-
- top = (__be64 *)(bh->b_data + mh_size) +
- (first ? mp->mp_list[height] : 0);
-
- bottom = (__be64 *)(bh->b_data + mh_size) + sdp->sd_inptrs;
- }
-
- error = bc(ip, dibh, bh, top, bottom, height, data);
- if (error)
- goto out;
-
- if (height < ip->i_height - 1)
- for (; top < bottom; top++, first = 0) {
- if (!*top)
- continue;
-
- bn = be64_to_cpu(*top);
-
- error = recursive_scan(ip, dibh, mp, height + 1, bn,
- first, bc, data);
- if (error)
- break;
- }
-
-out:
- brelse(bh);
- return error;
-}
-
/**
* do_strip - Look for a layer a particular layer of the file and strip it off
* @ip: the inode
static int do_strip(struct gfs2_inode *ip, struct buffer_head *dibh,
struct buffer_head *bh, __be64 *top, __be64 *bottom,
- unsigned int height, void *data)
+ unsigned int height, struct strip_mine *sm)
{
- struct strip_mine *sm = data;
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
struct gfs2_rgrp_list rlist;
u64 bn, bstart;
else if (ip->i_depth)
revokes = sdp->sd_inptrs;
- if (ip != GFS2_I(sdp->sd_rindex))
- error = gfs2_rindex_hold(sdp, &ip->i_alloc->al_ri_gh);
- else if (!sdp->sd_rgrps)
- error = gfs2_ri_update(ip);
-
if (error)
return error;
blen++;
else {
if (bstart)
- gfs2_rlist_add(sdp, &rlist, bstart);
+ gfs2_rlist_add(ip, &rlist, bstart);
bstart = bn;
blen = 1;
}
if (bstart)
- gfs2_rlist_add(sdp, &rlist, bstart);
+ gfs2_rlist_add(ip, &rlist, bstart);
else
goto out; /* Nothing to do */
out_rlist:
gfs2_rlist_free(&rlist);
out:
- if (ip != GFS2_I(sdp->sd_rindex))
- gfs2_glock_dq_uninit(&ip->i_alloc->al_ri_gh);
return error;
}
+/**
+ * recursive_scan - recursively scan through the end of a file
+ * @ip: the inode
+ * @dibh: the dinode buffer
+ * @mp: the path through the metadata to the point to start
+ * @height: the height the recursion is at
+ * @block: the indirect block to look at
+ * @first: 1 if this is the first block
+ * @sm: data opaque to this function to pass to @bc
+ *
+ * When this is first called @height and @block should be zero and
+ * @first should be 1.
+ *
+ * Returns: errno
+ */
+
+static int recursive_scan(struct gfs2_inode *ip, struct buffer_head *dibh,
+ struct metapath *mp, unsigned int height,
+ u64 block, int first, struct strip_mine *sm)
+{
+ struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
+ struct buffer_head *bh = NULL;
+ __be64 *top, *bottom;
+ u64 bn;
+ int error;
+ int mh_size = sizeof(struct gfs2_meta_header);
+
+ if (!height) {
+ error = gfs2_meta_inode_buffer(ip, &bh);
+ if (error)
+ return error;
+ dibh = bh;
+
+ top = (__be64 *)(bh->b_data + sizeof(struct gfs2_dinode)) + mp->mp_list[0];
+ bottom = (__be64 *)(bh->b_data + sizeof(struct gfs2_dinode)) + sdp->sd_diptrs;
+ } else {
+ error = gfs2_meta_indirect_buffer(ip, height, block, 0, &bh);
+ if (error)
+ return error;
+
+ top = (__be64 *)(bh->b_data + mh_size) +
+ (first ? mp->mp_list[height] : 0);
+
+ bottom = (__be64 *)(bh->b_data + mh_size) + sdp->sd_inptrs;
+ }
+
+ error = do_strip(ip, dibh, bh, top, bottom, height, sm);
+ if (error)
+ goto out;
+
+ if (height < ip->i_height - 1) {
+
+ gfs2_metapath_ra(ip->i_gl, bh, top);
+
+ for (; top < bottom; top++, first = 0) {
+ if (!*top)
+ continue;
+
+ bn = be64_to_cpu(*top);
+
+ error = recursive_scan(ip, dibh, mp, height + 1, bn,
+ first, sm);
+ if (error)
+ break;
+ }
+ }
+out:
+ brelse(bh);
+ return error;
+}
+
+
/**
* gfs2_block_truncate_page - Deal with zeroing out data for truncate
*
sm.sm_first = !!size;
sm.sm_height = height;
- error = recursive_scan(ip, NULL, &mp, 0, 0, 1, do_strip, &sm);
+ error = recursive_scan(ip, NULL, &mp, 0, 0, 1, &sm);
if (error)
break;
}
projects / karo-tx-linux.git / blobdiff