ocfs2: Support creation of unwritten extents

[linux-2.6-omap-h63xx.git] / fs / ocfs2 / dir.c

diff --git a/fs/ocfs2/dir.c b/fs/ocfs2/dir.c
index 04e01915b86e4e4f6ab86c6056da2ebcf4050d09..0d5fdde959c8018a2d244ae678d16fde1e5b3f33 100644 (file)
--- a/fs/ocfs2/dir.c
+++ b/fs/ocfs2/dir.c
@@ -79,9 +79,10 @@ int ocfs2_readdir(struct file * filp, void * dirent, filldir_t filldir)
        struct buffer_head * bh, * tmp;
        struct ocfs2_dir_entry * de;
        int err;
-       struct inode *inode = filp->f_dentry->d_inode;
+       struct inode *inode = filp->f_path.dentry->d_inode;
        struct super_block * sb = inode->i_sb;
        unsigned int ra_sectors = 16;
+       int lock_level = 0;
 
        mlog_entry("dirino=%llu\n",
                   (unsigned long long)OCFS2_I(inode)->ip_blkno);
@@ -89,7 +90,15 @@ int ocfs2_readdir(struct file * filp, void * dirent, filldir_t filldir)
        stored = 0;
        bh = NULL;
 
-       error = ocfs2_meta_lock(inode, NULL, NULL, 0);
+       error = ocfs2_meta_lock_atime(inode, filp->f_vfsmnt, &lock_level);
+       if (lock_level && error >= 0) {
+               /* We release EX lock which used to update atime
+                * and get PR lock again to reduce contention
+                * on commonly accessed directories. */
+               ocfs2_meta_unlock(inode, 1);
+               lock_level = 0;
+               error = ocfs2_meta_lock(inode, NULL, 0);
+       }
        if (error < 0) {
                if (error != -ENOENT)
                        mlog_errno(error);
@@ -198,7 +207,7 @@ revalidate:
 
        stored = 0;
 bail:
-       ocfs2_meta_unlock(inode, 0);
+       ocfs2_meta_unlock(inode, lock_level);
 
 bail_nolock:
        mlog_exit(stored);
@@ -340,7 +349,7 @@ int ocfs2_empty_dir(struct inode *inode)
 
 /* returns a bh of the 1st new block in the allocation. */
 int ocfs2_do_extend_dir(struct super_block *sb,
-                       struct ocfs2_journal_handle *handle,
+                       handle_t *handle,
                        struct inode *dir,
                        struct buffer_head *parent_fe_bh,
                        struct ocfs2_alloc_context *data_ac,
@@ -349,15 +358,17 @@ int ocfs2_do_extend_dir(struct super_block *sb,
 {
        int status;
        int extend;
-       u64 p_blkno;
+       u64 p_blkno, v_blkno;
 
        spin_lock(&OCFS2_I(dir)->ip_lock);
        extend = (i_size_read(dir) == ocfs2_clusters_to_bytes(sb, OCFS2_I(dir)->ip_clusters));
        spin_unlock(&OCFS2_I(dir)->ip_lock);
 
        if (extend) {
-               status = ocfs2_do_extend_allocation(OCFS2_SB(sb), dir, 1,
-                                                   parent_fe_bh, handle,
+               u32 offset = OCFS2_I(dir)->ip_clusters;
+
+               status = ocfs2_do_extend_allocation(OCFS2_SB(sb), dir, &offset,
+                                                   1, 0, parent_fe_bh, handle,
                                                    data_ac, meta_ac, NULL);
                BUG_ON(status == -EAGAIN);
                if (status < 0) {
@@ -366,9 +377,8 @@ int ocfs2_do_extend_dir(struct super_block *sb,
                }
        }
 
-       status = ocfs2_extent_map_get_blocks(dir, (dir->i_blocks >>
-                                                  (sb->s_blocksize_bits - 9)),
-                                            1, &p_blkno, NULL);
+       v_blkno = ocfs2_blocks_for_bytes(sb, i_size_read(dir));
+       status = ocfs2_extent_map_get_blocks(dir, v_blkno, &p_blkno, NULL, NULL);
        if (status < 0) {
                mlog_errno(status);
                goto bail;
@@ -393,12 +403,12 @@ static int ocfs2_extend_dir(struct ocfs2_super *osb,
                            struct buffer_head **new_de_bh)
 {
        int status = 0;
-       int credits, num_free_extents;
+       int credits, num_free_extents, drop_alloc_sem = 0;
        loff_t dir_i_size;
        struct ocfs2_dinode *fe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
        struct ocfs2_alloc_context *data_ac = NULL;
        struct ocfs2_alloc_context *meta_ac = NULL;
-       struct ocfs2_journal_handle *handle = NULL;
+       handle_t *handle = NULL;
        struct buffer_head *new_bh = NULL;
        struct ocfs2_dir_entry * de;
        struct super_block *sb = osb->sb;
@@ -409,13 +419,6 @@ static int ocfs2_extend_dir(struct ocfs2_super *osb,
        mlog(0, "extending dir %llu (i_size = %lld)\n",
             (unsigned long long)OCFS2_I(dir)->ip_blkno, dir_i_size);
 
-       handle = ocfs2_alloc_handle(osb);
-       if (handle == NULL) {
-               status = -ENOMEM;
-               mlog_errno(status);
-               goto bail;
-       }
-
        /* dir->i_size is always block aligned. */
        spin_lock(&OCFS2_I(dir)->ip_lock);
        if (dir_i_size == ocfs2_clusters_to_bytes(sb, OCFS2_I(dir)->ip_clusters)) {
@@ -428,8 +431,7 @@ static int ocfs2_extend_dir(struct ocfs2_super *osb,
                }
 
                if (!num_free_extents) {
-                       status = ocfs2_reserve_new_metadata(osb, handle,
-                                                           fe, &meta_ac);
+                       status = ocfs2_reserve_new_metadata(osb, fe, &meta_ac);
                        if (status < 0) {
                                if (status != -ENOSPC)
                                        mlog_errno(status);
@@ -437,7 +439,7 @@ static int ocfs2_extend_dir(struct ocfs2_super *osb,
                        }
                }
 
-               status = ocfs2_reserve_clusters(osb, handle, 1, &data_ac);
+               status = ocfs2_reserve_clusters(osb, 1, &data_ac);
                if (status < 0) {
                        if (status != -ENOSPC)
                                mlog_errno(status);
@@ -450,7 +452,10 @@ static int ocfs2_extend_dir(struct ocfs2_super *osb,
                credits = OCFS2_SIMPLE_DIR_EXTEND_CREDITS;
        }
 
-       handle = ocfs2_start_trans(osb, handle, credits);
+       down_write(&OCFS2_I(dir)->ip_alloc_sem);
+       drop_alloc_sem = 1;
+
+       handle = ocfs2_start_trans(osb, credits);
        if (IS_ERR(handle)) {
                status = PTR_ERR(handle);
                handle = NULL;
@@ -485,7 +490,7 @@ static int ocfs2_extend_dir(struct ocfs2_super *osb,
 
        dir_i_size += dir->i_sb->s_blocksize;
        i_size_write(dir, dir_i_size);
-       dir->i_blocks = ocfs2_align_bytes_to_sectors(dir_i_size);
+       dir->i_blocks = ocfs2_inode_sector_count(dir);
        status = ocfs2_mark_inode_dirty(handle, dir, parent_fe_bh);
        if (status < 0) {
                mlog_errno(status);
@@ -495,8 +500,10 @@ static int ocfs2_extend_dir(struct ocfs2_super *osb,
        *new_de_bh = new_bh;
        get_bh(*new_de_bh);
 bail:
+       if (drop_alloc_sem)
+               up_write(&OCFS2_I(dir)->ip_alloc_sem);
        if (handle)
-               ocfs2_commit_trans(handle);
+               ocfs2_commit_trans(osb, handle);
 
        if (data_ac)
                ocfs2_free_alloc_context(data_ac);