[PATCH] ufs2 write: inodes write

This patch adds into write inode path function to write UFS2 inode, and
modifys allocate inode path to allocate and init additional inode chunks.

Also some cleanups:
- remove not used parameters in some functions
- remove i_gen field from ufs_inode_info structure,
there is i_generation in inode structure with same purposes.

Signed-off-by: Evgeniy Dushistov <dushistov@mail.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 103 insertions, 13 deletions

diff --git a/fs/ufs/ialloc.c b/fs/ufs/ialloc.c
index 2ad1259..b868878 100644
--- a/fs/ufs/ialloc.c
+++ b/fs/ufs/ialloc.c
@@ -18,6 +18,9 @@
  *  Stephen Tweedie (sct@dcs.ed.ac.uk), 1993
  *  Big-endian to little-endian byte-swapping/bitmaps by
  *        David S. Miller (davem@caip.rutgers.edu), 1995
+ *
+ * UFS2 write support added by
+ * Evgeniy Dushistov <dushistov@mail.ru>, 2007
  */
 
 #include <linux/fs.h>
@@ -126,6 +129,47 @@ void ufs_free_inode (struct inode * inode)
 }
 
 /*
+ * Nullify new chunk of inodes,
+ * BSD people also set ui_gen field of inode
+ * during nullification, but we not care about
+ * that because of linux ufs do not support NFS
+ */
+static void ufs2_init_inodes_chunk(struct super_block *sb,
+				   struct ufs_cg_private_info *ucpi,
+				   struct ufs_cylinder_group *ucg)
+{
+	struct buffer_head *bh;
+	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
+	sector_t beg = uspi->s_sbbase +
+		ufs_inotofsba(ucpi->c_cgx * uspi->s_ipg +
+			      fs32_to_cpu(sb, ucg->cg_u.cg_u2.cg_initediblk));
+	sector_t end = beg + uspi->s_fpb;
+
+	UFSD("ENTER cgno %d\n", ucpi->c_cgx);
+
+	for (; beg < end; ++beg) {
+		bh = sb_getblk(sb, beg);
+		lock_buffer(bh);
+		memset(bh->b_data, 0, sb->s_blocksize);
+		set_buffer_uptodate(bh);
+		mark_buffer_dirty(bh);
+		unlock_buffer(bh);
+		if (sb->s_flags & MS_SYNCHRONOUS)
+			sync_dirty_buffer(bh);
+		brelse(bh);
+	}
+
+	fs32_add(sb, &ucg->cg_u.cg_u2.cg_initediblk, uspi->s_inopb);
+	ubh_mark_buffer_dirty(UCPI_UBH(ucpi));
+	if (sb->s_flags & MS_SYNCHRONOUS) {
+		ubh_ll_rw_block(SWRITE, UCPI_UBH(ucpi));
+		ubh_wait_on_buffer(UCPI_UBH(ucpi));
+	}
+
+	UFSD("EXIT\n");
+}
+
+/*
  * There are two policies for allocating an inode.  If the new inode is
  * a directory, then a forward search is made for a block group with both
  * free space and a low directory-to-inode ratio; if that fails, then of
@@ -146,6 +190,7 @@ struct inode * ufs_new_inode(struct inode * dir, int mode)
 	struct inode * inode;
 	unsigned cg, bit, i, j, start;
 	struct ufs_inode_info *ufsi;
+	int err = -ENOSPC;
 
 	UFSD("ENTER\n");
 	
@@ -198,13 +243,15 @@ struct inode * ufs_new_inode(struct inode * dir, int mode)
 			goto cg_found;
 		}
 	}
-	
+
 	goto failed;
 
 cg_found:
 	ucpi = ufs_load_cylinder (sb, cg);
-	if (!ucpi)
+	if (!ucpi) {
+		err = -EIO;
 		goto failed;
+	}
 	ucg = ubh_get_ucg(UCPI_UBH(ucpi));
 	if (!ufs_cg_chkmagic(sb, ucg)) 
 		ufs_panic (sb, "ufs_new_inode", "internal error, bad cg magic number");
@@ -216,6 +263,7 @@ cg_found:
 		if (!(bit < start)) {
 			ufs_error (sb, "ufs_new_inode",
 			    "cylinder group %u corrupted - error in inode bitmap\n", cg);
+			err = -EIO;
 			goto failed;
 		}
 	}
@@ -224,9 +272,18 @@ cg_found:
 		ubh_setbit (UCPI_UBH(ucpi), ucpi->c_iusedoff, bit);
 	else {
 		ufs_panic (sb, "ufs_new_inode", "internal error");
+		err = -EIO;
 		goto failed;
 	}
-	
+
+	if (uspi->fs_magic == UFS2_MAGIC) {
+		u32 initediblk = fs32_to_cpu(sb, ucg->cg_u.cg_u2.cg_initediblk);
+
+		if (bit + uspi->s_inopb > initediblk &&
+		    initediblk < fs32_to_cpu(sb, ucg->cg_u.cg_u2.cg_niblk))
+			ufs2_init_inodes_chunk(sb, ucpi, ucg);
+	}
+
 	fs32_sub(sb, &ucg->cg_cs.cs_nifree, 1);
 	uspi->cs_total.cs_nifree--;
 	fs32_sub(sb, &sbi->fs_cs(cg).cs_nifree, 1);
@@ -236,7 +293,6 @@ cg_found:
 		uspi->cs_total.cs_ndir++;
 		fs32_add(sb, &sbi->fs_cs(cg).cs_ndir, 1);
 	}
-
 	ubh_mark_buffer_dirty (USPI_UBH(uspi));
 	ubh_mark_buffer_dirty (UCPI_UBH(ucpi));
 	if (sb->s_flags & MS_SYNCHRONOUS) {
@@ -245,6 +301,7 @@ cg_found:
 	}
 	sb->s_dirt = 1;
 
+	inode->i_ino = cg * uspi->s_ipg + bit;
 	inode->i_mode = mode;
 	inode->i_uid = current->fsuid;
 	if (dir->i_mode & S_ISGID) {
@@ -254,39 +311,72 @@ cg_found:
 	} else
 		inode->i_gid = current->fsgid;
 
-	inode->i_ino = cg * uspi->s_ipg + bit;
 	inode->i_blocks = 0;
+	inode->i_generation = 0;
 	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
 	ufsi->i_flags = UFS_I(dir)->i_flags;
 	ufsi->i_lastfrag = 0;
-	ufsi->i_gen = 0;
 	ufsi->i_shadow = 0;
 	ufsi->i_osync = 0;
 	ufsi->i_oeftflag = 0;
 	ufsi->i_dir_start_lookup = 0;
 	memset(&ufsi->i_u1, 0, sizeof(ufsi->i_u1));
-
 	insert_inode_hash(inode);
 	mark_inode_dirty(inode);
 
+	if (uspi->fs_magic == UFS2_MAGIC) {
+		struct buffer_head *bh;
+		struct ufs2_inode *ufs2_inode;
+
+		/*
+		 * setup birth date, we do it here because of there is no sense
+		 * to hold it in struct ufs_inode_info, and lose 64 bit
+		 */
+		bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino));
+		if (!bh) {
+			ufs_warning(sb, "ufs_read_inode",
+				    "unable to read inode %lu\n",
+				    inode->i_ino);
+			err = -EIO;
+			goto fail_remove_inode;
+		}
+		lock_buffer(bh);
+		ufs2_inode = (struct ufs2_inode *)bh->b_data;
+		ufs2_inode += ufs_inotofsbo(inode->i_ino);
+		ufs2_inode->ui_birthtime.tv_sec =
+			cpu_to_fs32(sb, CURRENT_TIME_SEC.tv_sec);
+		ufs2_inode->ui_birthtime.tv_usec = 0;
+		mark_buffer_dirty(bh);
+		unlock_buffer(bh);
+		if (sb->s_flags & MS_SYNCHRONOUS)
+			sync_dirty_buffer(bh);
+		brelse(bh);
+	}
+
 	unlock_super (sb);
 
 	if (DQUOT_ALLOC_INODE(inode)) {
 		DQUOT_DROP(inode);
-		inode->i_flags |= S_NOQUOTA;
-		inode->i_nlink = 0;
-		iput(inode);
-		return ERR_PTR(-EDQUOT);
+		err = -EDQUOT;
+		goto fail_without_unlock;
 	}
 
 	UFSD("allocating inode %lu\n", inode->i_ino);
 	UFSD("EXIT\n");
 	return inode;
 
+fail_remove_inode:
+	unlock_super(sb);
+fail_without_unlock:
+	inode->i_flags |= S_NOQUOTA;
+	inode->i_nlink = 0;
+	iput(inode);
+	UFSD("EXIT (FAILED): err %d\n", err);
+	return ERR_PTR(err);
 failed:
 	unlock_super (sb);
 	make_bad_inode(inode);
 	iput (inode);
-	UFSD("EXIT (FAILED)\n");
-	return ERR_PTR(-ENOSPC);
+	UFSD("EXIT (FAILED): err %d\n", err);
+	return ERR_PTR(err);
 }