nilfs2: unfold nilfs_dat_inode function

nilfs_dat_inode function was a wrapper to switch between normal dat
inode and gcdat, a clone of the dat inode for garbage collection.

This function got obsolete when the gcdat inode was removed, and now
we can access the dat inode directly from a nilfs object.  So, we will
unfold the wrapper and remove it.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>

diff --git a/fs/nilfs2/bmap.c b/fs/nilfs2/bmap.c
index 4b7aeb3..3ee67c6 100644 (file)
--- a/fs/nilfs2/bmap.c
+++ b/fs/nilfs2/bmap.c
@@ -35,7 +35,7 @@
 
 struct inode *nilfs_bmap_get_dat(const struct nilfs_bmap *bmap)
 {
-       return nilfs_dat_inode(NILFS_I_NILFS(bmap->b_inode));
+       return NILFS_I_NILFS(bmap->b_inode)->ns_dat;
 }
 
 static int nilfs_bmap_convert_error(struct nilfs_bmap *bmap,

diff --git a/fs/nilfs2/btnode.c b/fs/nilfs2/btnode.c
index 5115814..388e9e8 100644 (file)
--- a/fs/nilfs2/btnode.c
+++ b/fs/nilfs2/btnode.c
@@ -104,8 +104,7 @@ int nilfs_btnode_submit_block(struct address_space *btnc, __u64 blocknr,
        if (pblocknr == 0) {
                pblocknr = blocknr;
                if (inode->i_ino != NILFS_DAT_INO) {
-                       struct inode *dat =
-                               nilfs_dat_inode(NILFS_I_NILFS(inode));
+                       struct inode *dat = NILFS_I_NILFS(inode)->ns_dat;
 
                        /* blocknr is a virtual block number */
                        err = nilfs_dat_translate(dat, blocknr, &pblocknr);

diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c
index 4341647..2fd440d 100644 (file)
--- a/fs/nilfs2/inode.c
+++ b/fs/nilfs2/inode.c
@@ -58,7 +58,7 @@ int nilfs_get_block(struct inode *inode, sector_t blkoff,
        struct nilfs_inode_info *ii = NILFS_I(inode);
        __u64 blknum = 0;
        int err = 0, ret;
-       struct inode *dat = nilfs_dat_inode(NILFS_I_NILFS(inode));
+       struct inode *dat = NILFS_I_NILFS(inode)->ns_dat;
        unsigned maxblocks = bh_result->b_size >> inode->i_blkbits;
 
        down_read(&NILFS_MDT(dat)->mi_sem);
@@ -420,13 +420,12 @@ static int __nilfs_read_inode(struct super_block *sb,
                              struct nilfs_root *root, unsigned long ino,
                              struct inode *inode)
 {
-       struct nilfs_sb_info *sbi = NILFS_SB(sb);
-       struct inode *dat = nilfs_dat_inode(sbi->s_nilfs);
+       struct the_nilfs *nilfs = NILFS_SB(sb)->s_nilfs;
        struct buffer_head *bh;
        struct nilfs_inode *raw_inode;
        int err;
 
-       down_read(&NILFS_MDT(dat)->mi_sem);     /* XXX */
+       down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem);
        err = nilfs_ifile_get_inode_block(root->ifile, ino, &bh);
        if (unlikely(err))
                goto bad_inode;
@@ -456,7 +455,7 @@ static int __nilfs_read_inode(struct super_block *sb,
        }
        nilfs_ifile_unmap_inode(root->ifile, ino, bh);
        brelse(bh);
-       up_read(&NILFS_MDT(dat)->mi_sem);       /* XXX */
+       up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem);
        nilfs_set_inode_flags(inode);
        return 0;
 
@@ -465,7 +464,7 @@ static int __nilfs_read_inode(struct super_block *sb,
        brelse(bh);
 
  bad_inode:
-       up_read(&NILFS_MDT(dat)->mi_sem);       /* XXX */
+       up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem);
        return err;
 }
 

diff --git a/fs/nilfs2/ioctl.c b/fs/nilfs2/ioctl.c
index b185e93..4967389 100644 (file)
--- a/fs/nilfs2/ioctl.c
+++ b/fs/nilfs2/ioctl.c
@@ -233,7 +233,7 @@ nilfs_ioctl_do_get_vinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
        int ret;
 
        down_read(&nilfs->ns_segctor_sem);
-       ret = nilfs_dat_get_vinfo(nilfs_dat_inode(nilfs), buf, size, nmembs);
+       ret = nilfs_dat_get_vinfo(nilfs->ns_dat, buf, size, nmembs);
        up_read(&nilfs->ns_segctor_sem);
        return ret;
 }
@@ -242,8 +242,7 @@ static ssize_t
 nilfs_ioctl_do_get_bdescs(struct the_nilfs *nilfs, __u64 *posp, int flags,
                          void *buf, size_t size, size_t nmembs)
 {
-       struct inode *dat = nilfs_dat_inode(nilfs);
-       struct nilfs_bmap *bmap = NILFS_I(dat)->i_bmap;
+       struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap;
        struct nilfs_bdesc *bdescs = buf;
        int ret, i;
 
@@ -421,7 +420,7 @@ static int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs,
        size_t nmembs = argv->v_nmembs;
        int ret;
 
-       ret = nilfs_dat_freev(nilfs_dat_inode(nilfs), buf, nmembs);
+       ret = nilfs_dat_freev(nilfs->ns_dat, buf, nmembs);
 
        return (ret < 0) ? ret : nmembs;
 }
@@ -430,8 +429,7 @@ static int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs,
                                         struct nilfs_argv *argv, void *buf)
 {
        size_t nmembs = argv->v_nmembs;
-       struct inode *dat = nilfs_dat_inode(nilfs);
-       struct nilfs_bmap *bmap = NILFS_I(dat)->i_bmap;
+       struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap;
        struct nilfs_bdesc *bdescs = buf;
        int ret, i;
 
@@ -450,7 +448,7 @@ static int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs,
                        /* skip dead block */
                        continue;
                if (bdescs[i].bd_level == 0) {
-                       ret = nilfs_mdt_mark_block_dirty(dat,
+                       ret = nilfs_mdt_mark_block_dirty(nilfs->ns_dat,
                                                         bdescs[i].bd_offset);
                        if (ret < 0) {
                                WARN_ON(ret == -ENOENT);

diff --git a/fs/nilfs2/nilfs.h b/fs/nilfs2/nilfs.h
index 981183d..777e8fd 100644 (file)
--- a/fs/nilfs2/nilfs.h
+++ b/fs/nilfs2/nilfs.h
@@ -190,11 +190,6 @@ static inline int nilfs_doing_construction(void)
        return nilfs_test_transaction_flag(NILFS_TI_WRITER);
 }
 
-static inline struct inode *nilfs_dat_inode(const struct the_nilfs *nilfs)
-{
-       return nilfs->ns_dat;
-}
-
 /*
  * function prototype
  */

diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c
index efc7d0a..55ebae5 100644 (file)
--- a/fs/nilfs2/segment.c
+++ b/fs/nilfs2/segment.c
@@ -757,9 +757,8 @@ static int nilfs_test_metadata_dirty(struct the_nilfs *nilfs,
                ret++;
        if (nilfs_mdt_fetch_dirty(nilfs->ns_sufile))
                ret++;
-       if (ret || nilfs_doing_gc())
-               if (nilfs_mdt_fetch_dirty(nilfs_dat_inode(nilfs)))
-                       ret++;
+       if ((ret || nilfs_doing_gc()) && nilfs_mdt_fetch_dirty(nilfs->ns_dat))
+               ret++;
        return ret;
 }
 
@@ -795,7 +794,7 @@ static void nilfs_segctor_clear_metadata_dirty(struct nilfs_sc_info *sci)
        nilfs_mdt_clear_dirty(sci->sc_root->ifile);
        nilfs_mdt_clear_dirty(nilfs->ns_cpfile);
        nilfs_mdt_clear_dirty(nilfs->ns_sufile);
-       nilfs_mdt_clear_dirty(nilfs_dat_inode(nilfs));
+       nilfs_mdt_clear_dirty(nilfs->ns_dat);
 }
 
 static int nilfs_segctor_create_checkpoint(struct nilfs_sc_info *sci)
@@ -904,7 +903,7 @@ static void nilfs_segctor_fill_in_super_root(struct nilfs_sc_info *sci,
                              nilfs->ns_nongc_ctime : sci->sc_seg_ctime);
        raw_sr->sr_flags = 0;
 
-       nilfs_write_inode_common(nilfs_dat_inode(nilfs), (void *)raw_sr +
+       nilfs_write_inode_common(nilfs->ns_dat, (void *)raw_sr +
                                 NILFS_SR_DAT_OFFSET(isz), 1);
        nilfs_write_inode_common(nilfs->ns_cpfile, (void *)raw_sr +
                                 NILFS_SR_CPFILE_OFFSET(isz), 1);
@@ -1160,7 +1159,7 @@ static int nilfs_segctor_collect_blocks(struct nilfs_sc_info *sci, int mode)
                sci->sc_stage.scnt++;  /* Fall through */
        case NILFS_ST_DAT:
  dat_stage:
-               err = nilfs_segctor_scan_file(sci, nilfs_dat_inode(nilfs),
+               err = nilfs_segctor_scan_file(sci, nilfs->ns_dat,
                                              &nilfs_sc_dat_ops);
                if (unlikely(err))
                        break;

diff --git a/fs/nilfs2/the_nilfs.c b/fs/nilfs2/the_nilfs.c
index 95e4443..ad4ac60 100644 (file)
--- a/fs/nilfs2/the_nilfs.c
+++ b/fs/nilfs2/the_nilfs.c
@@ -650,12 +650,11 @@ int nilfs_discard_segments(struct the_nilfs *nilfs, __u64 *segnump,
 
 int nilfs_count_free_blocks(struct the_nilfs *nilfs, sector_t *nblocks)
 {
-       struct inode *dat = nilfs_dat_inode(nilfs);
        unsigned long ncleansegs;
 
-       down_read(&NILFS_MDT(dat)->mi_sem);     /* XXX */
+       down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem);
        ncleansegs = nilfs_sufile_get_ncleansegs(nilfs->ns_sufile);
-       up_read(&NILFS_MDT(dat)->mi_sem);       /* XXX */
+       up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem);
        *nblocks = (sector_t)ncleansegs * nilfs->ns_blocks_per_segment;
        return 0;
 }