Merge tag 'gfs2-for-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2

Pull gfs2 updates from Andreas Gruenbacher:

 - Fix some corner cases on filesystems with a block size < page size.

 - Fix a corner case that could expose incorrect access times over nfs.

 - Revert an otherwise sensible revoke accounting cleanup that causes
   assertion failures. The revoke accounting is whacky and needs to be
   fixed properly before we can add back this cleanup.

 - Various other minor cleanups.

In addition, please expect to see another pull request from Bob Peterson
about his gfs2 recovery patch queue shortly.

* tag 'gfs2-for-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2:
  Revert "gfs2: eliminate tr_num_revoke_rm"
  gfs2: remove unused LBIT macros
  fs/gfs2: remove unused IS_DINODE and IS_LEAF macros
  gfs2: Remove GFS2_MIN_LVB_SIZE define
  gfs2: Fix incorrect variable name
  gfs2: Avoid access time thrashing in gfs2_inode_lookup
  gfs2: minor cleanup: remove unneeded variable ret in gfs2_jdata_writepage
  gfs2: eliminate ssize parameter from gfs2_struct2blk
  gfs2: Another gfs2_find_jhead fix

Author: torvalds

fs/gfs2/aops.c

@@ -183,14 +183,12 @@ static int gfs2_jdata_writepage(struct page *page, struct writeback_control *wbc
 	struct inode *inode = page->mapping->host;
 	struct gfs2_inode *ip = GFS2_I(inode);
 	struct gfs2_sbd *sdp = GFS2_SB(inode);
-	int ret;
 
 	if (gfs2_assert_withdraw(sdp, gfs2_glock_is_held_excl(ip->i_gl)))
 		goto out;
 	if (PageChecked(page) || current->journal_info)
 		goto out_ignore;
-	ret = __gfs2_jdata_writepage(page, wbc);
-	return ret;
+	return __gfs2_jdata_writepage(page, wbc);
 
 out_ignore:
 	redirty_page_for_writepage(wbc, page);

fs/gfs2/dir.c

@@ -73,9 +73,6 @@
 #include "bmap.h"
 #include "util.h"
 
-#define IS_LEAF     1 /* Hashed (leaf) directory */
-#define IS_DINODE   2 /* Linear (stuffed dinode block) directory */
-
 #define MAX_RA_BLOCKS 32 /* max read-ahead blocks */
 
 #define gfs2_disk_hash2offset(h) (((u64)(h)) >> 1)

fs/gfs2/glock.c

@@ -826,7 +826,7 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number,
 	memset(&gl->gl_lksb, 0, sizeof(struct dlm_lksb));
 
 	if (glops->go_flags & GLOF_LVB) {
-		gl->gl_lksb.sb_lvbptr = kzalloc(GFS2_MIN_LVB_SIZE, GFP_NOFS);
+		gl->gl_lksb.sb_lvbptr = kzalloc(GDLM_LVB_SIZE, GFP_NOFS);
 		if (!gl->gl_lksb.sb_lvbptr) {
 			kmem_cache_free(cachep, gl);
 			return -ENOMEM;

fs/gfs2/glops.c

@@ -95,7 +95,7 @@ static void gfs2_ail_empty_gl(struct gfs2_glock *gl)
 	/* A shortened, inline version of gfs2_trans_begin()
          * tr->alloced is not set since the transaction structure is
          * on the stack */
-	tr.tr_reserved = 1 + gfs2_struct2blk(sdp, tr.tr_revokes, sizeof(u64));
+	tr.tr_reserved = 1 + gfs2_struct2blk(sdp, tr.tr_revokes);
 	tr.tr_ip = _RET_IP_;
 	if (gfs2_log_reserve(sdp, tr.tr_reserved) < 0)
 		return;

fs/gfs2/incore.h

@@ -387,8 +387,6 @@ struct gfs2_glock {
 	struct rhash_head gl_node;
 };
 
-#define GFS2_MIN_LVB_SIZE 32	/* Min size of LVB that gfs2 supports */
-
 enum {
 	GIF_INVALID		= 0,
 	GIF_QD_LOCKED		= 1,
@@ -505,6 +503,7 @@ struct gfs2_trans {
 	unsigned int tr_num_buf_rm;
 	unsigned int tr_num_databuf_rm;
 	unsigned int tr_num_revoke;
+	unsigned int tr_num_revoke_rm;
 
 	struct list_head tr_list;
 	struct list_head tr_databuf;
@@ -703,6 +702,7 @@ struct gfs2_sbd {
 	u32 sd_fsb2bb_shift;
 	u32 sd_diptrs;	/* Number of pointers in a dinode */
 	u32 sd_inptrs;	/* Number of pointers in a indirect block */
+	u32 sd_ldptrs;  /* Number of pointers in a log descriptor block */
 	u32 sd_jbsize;	/* Size of a journaled data block */
 	u32 sd_hash_bsize;	/* sizeof(exhash block) */
 	u32 sd_hash_bsize_shift;
@@ -803,7 +803,7 @@ struct gfs2_sbd {
 
 	struct gfs2_trans *sd_log_tr;
 	unsigned int sd_log_blks_reserved;
-	int sd_log_commited_revoke;
+	int sd_log_committed_revoke;
 
 	atomic_t sd_log_pinned;
 	unsigned int sd_log_num_revoke;

fs/gfs2/inode.c

@@ -136,7 +136,6 @@ struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
 
 	if (inode->i_state & I_NEW) {
 		struct gfs2_sbd *sdp = GFS2_SB(inode);
-		ip->i_no_formal_ino = no_formal_ino;
 
 		error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
 		if (unlikely(error))
@@ -175,21 +174,22 @@ struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
 		gfs2_glock_put(io_gl);
 		io_gl = NULL;
 
+		/* Lowest possible timestamp; will be overwritten in gfs2_dinode_in. */
+		inode->i_atime.tv_sec = 1LL << (8 * sizeof(inode->i_atime.tv_sec) - 1);
+		inode->i_atime.tv_nsec = 0;
+
 		if (type == DT_UNKNOWN) {
 			/* Inode glock must be locked already */
 			error = gfs2_inode_refresh(GFS2_I(inode));
 			if (error)
 				goto fail_refresh;
 		} else {
+			ip->i_no_formal_ino = no_formal_ino;
 			inode->i_mode = DT2IF(type);
 		}
 
 		gfs2_set_iop(inode);
 
-		/* Lowest possible timestamp; will be overwritten in gfs2_dinode_in. */
-		inode->i_atime.tv_sec = 1LL << (8 * sizeof(inode->i_atime.tv_sec) - 1);
-		inode->i_atime.tv_nsec = 0;
-
 		unlock_new_inode(inode);
 	}
 

fs/gfs2/log.c

@@ -37,26 +37,23 @@ static void gfs2_log_shutdown(struct gfs2_sbd *sdp);
  * gfs2_struct2blk - compute stuff
  * @sdp: the filesystem
  * @nstruct: the number of structures
- * @ssize: the size of the structures
  *
  * Compute the number of log descriptor blocks needed to hold a certain number
  * of structures of a certain size.
  *
  * Returns: the number of blocks needed (minimum is always 1)
  */
 
-unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct,
-			     unsigned int ssize)
+unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct)
 {
 	unsigned int blks;
 	unsigned int first, second;
 
 	blks = 1;
-	first = (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_log_descriptor)) / ssize;
+	first = sdp->sd_ldptrs;
 
 	if (nstruct > first) {
-		second = (sdp->sd_sb.sb_bsize -
-			  sizeof(struct gfs2_meta_header)) / ssize;
+		second = sdp->sd_inptrs;
 		blks += DIV_ROUND_UP(nstruct - first, second);
 	}
 
@@ -472,9 +469,8 @@ static unsigned int calc_reserved(struct gfs2_sbd *sdp)
 		reserved += DIV_ROUND_UP(dbuf, databuf_limit(sdp));
 	}
 
-	if (sdp->sd_log_commited_revoke > 0)
-		reserved += gfs2_struct2blk(sdp, sdp->sd_log_commited_revoke,
-					  sizeof(u64));
+	if (sdp->sd_log_committed_revoke > 0)
+		reserved += gfs2_struct2blk(sdp, sdp->sd_log_committed_revoke);
 	/* One for the overall header */
 	if (reserved)
 		reserved++;
@@ -829,7 +825,7 @@ void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl, u32 flags)
 	if (unlikely(state == SFS_FROZEN))
 		gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke);
 	gfs2_assert_withdraw(sdp,
-			sdp->sd_log_num_revoke == sdp->sd_log_commited_revoke);
+			sdp->sd_log_num_revoke == sdp->sd_log_committed_revoke);
 
 	gfs2_ordered_write(sdp);
 	lops_before_commit(sdp, tr);
@@ -848,7 +844,7 @@ void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl, u32 flags)
 	gfs2_log_lock(sdp);
 	sdp->sd_log_head = sdp->sd_log_flush_head;
 	sdp->sd_log_blks_reserved = 0;
-	sdp->sd_log_commited_revoke = 0;
+	sdp->sd_log_committed_revoke = 0;
 
 	spin_lock(&sdp->sd_ail_lock);
 	if (tr && !list_empty(&tr->tr_ail1_list)) {
@@ -899,6 +895,7 @@ static void gfs2_merge_trans(struct gfs2_trans *old, struct gfs2_trans *new)
 	old->tr_num_buf_rm	+= new->tr_num_buf_rm;
 	old->tr_num_databuf_rm	+= new->tr_num_databuf_rm;
 	old->tr_num_revoke	+= new->tr_num_revoke;
+	old->tr_num_revoke_rm	+= new->tr_num_revoke_rm;
 
 	list_splice_tail_init(&new->tr_databuf, &old->tr_databuf);
 	list_splice_tail_init(&new->tr_buf, &old->tr_buf);
@@ -920,7 +917,7 @@ static void log_refund(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
 		set_bit(TR_ATTACHED, &tr->tr_flags);
 	}
 
-	sdp->sd_log_commited_revoke += tr->tr_num_revoke;
+	sdp->sd_log_committed_revoke += tr->tr_num_revoke - tr->tr_num_revoke_rm;
 	reserved = calc_reserved(sdp);
 	maxres = sdp->sd_log_blks_reserved + tr->tr_reserved;
 	gfs2_assert_withdraw(sdp, maxres >= reserved);

fs/gfs2/log.h

@@ -60,9 +60,9 @@ static inline void gfs2_ordered_add_inode(struct gfs2_inode *ip)
 		spin_unlock(&sdp->sd_ordered_lock);
 	}
 }
+
 extern void gfs2_ordered_del_inode(struct gfs2_inode *ip);
-extern unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct,
-			    unsigned int ssize);
+extern unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct);
 
 extern void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks);
 extern int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks);

fs/gfs2/lops.c

@@ -259,7 +259,7 @@ static struct bio *gfs2_log_alloc_bio(struct gfs2_sbd *sdp, u64 blkno,
 	struct super_block *sb = sdp->sd_vfs;
 	struct bio *bio = bio_alloc(GFP_NOIO, BIO_MAX_PAGES);
 
-	bio->bi_iter.bi_sector = blkno * (sb->s_blocksize >> 9);
+	bio->bi_iter.bi_sector = blkno << (sb->s_blocksize_bits - 9);
 	bio_set_dev(bio, sb->s_bdev);
 	bio->bi_end_io = end_io;
 	bio->bi_private = sdp;
@@ -472,6 +472,20 @@ static void gfs2_jhead_process_page(struct gfs2_jdesc *jd, unsigned long index,
 	put_page(page); /* Once more for find_or_create_page */
 }
 
+static struct bio *gfs2_chain_bio(struct bio *prev, unsigned int nr_iovecs)
+{
+	struct bio *new;
+
+	new = bio_alloc(GFP_NOIO, nr_iovecs);
+	bio_copy_dev(new, prev);
+	new->bi_iter.bi_sector = bio_end_sector(prev);
+	new->bi_opf = prev->bi_opf;
+	new->bi_write_hint = prev->bi_write_hint;
+	bio_chain(new, prev);
+	submit_bio(prev);
+	return new;
+}
+
 /**
  * gfs2_find_jhead - find the head of a log
  * @jd: The journal descriptor
@@ -488,15 +502,15 @@ int gfs2_find_jhead(struct gfs2_jdesc *jd, struct gfs2_log_header_host *head,
 	struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
 	struct address_space *mapping = jd->jd_inode->i_mapping;
 	unsigned int block = 0, blocks_submitted = 0, blocks_read = 0;
-	unsigned int bsize = sdp->sd_sb.sb_bsize;
+	unsigned int bsize = sdp->sd_sb.sb_bsize, off;
 	unsigned int bsize_shift = sdp->sd_sb.sb_bsize_shift;
 	unsigned int shift = PAGE_SHIFT - bsize_shift;
-	unsigned int readhead_blocks = BIO_MAX_PAGES << shift;
+	unsigned int readahead_blocks = BIO_MAX_PAGES << shift;
 	struct gfs2_journal_extent *je;
 	int sz, ret = 0;
 	struct bio *bio = NULL;
 	struct page *page = NULL;
-	bool done = false;
+	bool bio_chained = false, done = false;
 	errseq_t since;
 
 	memset(head, 0, sizeof(*head));
@@ -505,9 +519,9 @@ int gfs2_find_jhead(struct gfs2_jdesc *jd, struct gfs2_log_header_host *head,
 
 	since = filemap_sample_wb_err(mapping);
 	list_for_each_entry(je, &jd->extent_list, list) {
-		for (; block < je->lblock + je->blocks; block++) {
-			u64 dblock;
+		u64 dblock = je->dblock;
 
+		for (; block < je->lblock + je->blocks; block++, dblock++) {
 			if (!page) {
 				page = find_or_create_page(mapping,
 						block >> shift, GFP_NOFS);
@@ -516,35 +530,41 @@ int gfs2_find_jhead(struct gfs2_jdesc *jd, struct gfs2_log_header_host *head,
 					done = true;
 					goto out;
 				}
+				off = 0;
 			}
 
-			if (bio) {
-				unsigned int off;
-
-				off = (block << bsize_shift) & ~PAGE_MASK;
+			if (!bio || (bio_chained && !off)) {
+				/* start new bio */
+			} else {
 				sz = bio_add_page(bio, page, bsize, off);
-				if (sz == bsize) { /* block added */
-					if (off + bsize == PAGE_SIZE) {
-						page = NULL;
-						goto page_added;
-					}
-					continue;
+				if (sz == bsize)
+					goto block_added;
+				if (off) {
+					unsigned int blocks =
+						(PAGE_SIZE - off) >> bsize_shift;
+
+					bio = gfs2_chain_bio(bio, blocks);
+					bio_chained = true;
+					goto add_block_to_new_bio;
 				}
+			}
+
+			if (bio) {
 				blocks_submitted = block + 1;
 				submit_bio(bio);
-				bio = NULL;
 			}
 
-			dblock = je->dblock + (block - je->lblock);
 			bio = gfs2_log_alloc_bio(sdp, dblock, gfs2_end_log_read);
 			bio->bi_opf = REQ_OP_READ;
-			sz = bio_add_page(bio, page, bsize, 0);
-			gfs2_assert_warn(sdp, sz == bsize);
-			if (bsize == PAGE_SIZE)
+			bio_chained = false;
+add_block_to_new_bio:
+			sz = bio_add_page(bio, page, bsize, off);
+			BUG_ON(sz != bsize);
+block_added:
+			off += bsize;
+			if (off == PAGE_SIZE)
 				page = NULL;
-
-page_added:
-			if (blocks_submitted < blocks_read + readhead_blocks) {
+			if (blocks_submitted < blocks_read + readahead_blocks) {
 				/* Keep at least one bio in flight */
 				continue;
 			}
@@ -846,7 +866,7 @@ static void revoke_lo_before_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
 	if (!sdp->sd_log_num_revoke)
 		return;
 
-	length = gfs2_struct2blk(sdp, sdp->sd_log_num_revoke, sizeof(u64));
+	length = gfs2_struct2blk(sdp, sdp->sd_log_num_revoke);
 	page = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_REVOKE, length, sdp->sd_log_num_revoke);
 	offset = sizeof(struct gfs2_log_descriptor);
 

fs/gfs2/ops_fstype.c

@@ -298,6 +298,8 @@ static int gfs2_read_sb(struct gfs2_sbd *sdp, int silent)
 			  sizeof(struct gfs2_dinode)) / sizeof(u64);
 	sdp->sd_inptrs = (sdp->sd_sb.sb_bsize -
 			  sizeof(struct gfs2_meta_header)) / sizeof(u64);
+	sdp->sd_ldptrs = (sdp->sd_sb.sb_bsize -
+			  sizeof(struct gfs2_log_descriptor)) / sizeof(u64);
 	sdp->sd_jbsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header);
 	sdp->sd_hash_bsize = sdp->sd_sb.sb_bsize / 2;
 	sdp->sd_hash_bsize_shift = sdp->sd_sb.sb_bsize_shift - 1;