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Commit 385820a3 authored by Mark Fasheh's avatar Mark Fasheh
Browse files

ocfs2: ->fallocate() support 



Plug ocfs2 into the ->fallocate() callback. This just re-uses the existing
preallocation code.

Signed-off-by: default avatarMark Fasheh <mark.fasheh@oracle.com>
parent 589f1e81

fs/ocfs2/file.c

+59 −18
Original line number Diff line number Diff line
@@ -34,6 +34,7 @@ 
#include <linux/splice.h>

#include <linux/mount.h>

#include <linux/writeback.h>

#include <linux/falloc.h>



#define MLOG_MASK_PREFIX ML_INODE

#include <cluster/masklog.h>
@@ -1504,30 +1505,19 @@ static int ocfs2_remove_inode_range(struct inode *inode, 
/*

 * Parts of this function taken from xfs_change_file_space()

 */

int ocfs2_change_file_space(struct file *file, unsigned int cmd,

			    struct ocfs2_space_resv *sr)

static int __ocfs2_change_file_space(struct file *file, struct inode *inode,

				     loff_t f_pos, unsigned int cmd,

				     struct ocfs2_space_resv *sr,

				     int change_size)

{

	int ret;

	s64 llen;

	struct inode *inode = file->f_path.dentry->d_inode;

	loff_t size;

	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);

	struct buffer_head *di_bh = NULL;

	handle_t *handle;

	unsigned long long max_off = ocfs2_max_file_offset(inode->i_sb->s_blocksize_bits);



	if ((cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) &&

	    !ocfs2_writes_unwritten_extents(osb))

		return -ENOTTY;

	else if ((cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) &&

		 !ocfs2_sparse_alloc(osb))

		return -ENOTTY;



	if (!S_ISREG(inode->i_mode))

		return -EINVAL;



	if (!(file->f_mode & FMODE_WRITE))

		return -EBADF;



	if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))

		return -EROFS;
@@ -1557,7 +1547,7 @@ int ocfs2_change_file_space(struct file *file, unsigned int cmd, 
	case 0: /*SEEK_SET*/

		break;

	case 1: /*SEEK_CUR*/

		sr->l_start += file->f_pos;

		sr->l_start += f_pos;

		break;

	case 2: /*SEEK_END*/

		sr->l_start += i_size_read(inode);
@@ -1577,6 +1567,7 @@ int ocfs2_change_file_space(struct file *file, unsigned int cmd, 
		ret = -EINVAL;

		goto out_meta_unlock;

	}

	size = sr->l_start + sr->l_len;



	if (cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) {

		if (sr->l_len <= 0) {
@@ -1585,7 +1576,7 @@ int ocfs2_change_file_space(struct file *file, unsigned int cmd, 
		}

	}



	if (should_remove_suid(file->f_path.dentry)) {

	if (file && should_remove_suid(file->f_path.dentry)) {

		ret = __ocfs2_write_remove_suid(inode, di_bh);

		if (ret) {

			mlog_errno(ret);
@@ -1628,6 +1619,9 @@ int ocfs2_change_file_space(struct file *file, unsigned int cmd, 
		goto out_meta_unlock;

	}



	if (change_size && i_size_read(inode) < size)

		i_size_write(inode, size);



	inode->i_ctime = inode->i_mtime = CURRENT_TIME;

	ret = ocfs2_mark_inode_dirty(handle, inode, di_bh);

	if (ret < 0)
@@ -1646,6 +1640,52 @@ int ocfs2_change_file_space(struct file *file, unsigned int cmd, 
	return ret;

}



int ocfs2_change_file_space(struct file *file, unsigned int cmd,

			    struct ocfs2_space_resv *sr)

{

	struct inode *inode = file->f_path.dentry->d_inode;

	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);;



	if ((cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) &&

	    !ocfs2_writes_unwritten_extents(osb))

		return -ENOTTY;

	else if ((cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) &&

		 !ocfs2_sparse_alloc(osb))

		return -ENOTTY;



	if (!S_ISREG(inode->i_mode))

		return -EINVAL;



	if (!(file->f_mode & FMODE_WRITE))

		return -EBADF;



	return __ocfs2_change_file_space(file, inode, file->f_pos, cmd, sr, 0);

}



static long ocfs2_fallocate(struct inode *inode, int mode, loff_t offset,

			    loff_t len)

{

	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);

	struct ocfs2_space_resv sr;

	int change_size = 1;



	if (!ocfs2_writes_unwritten_extents(osb))

		return -EOPNOTSUPP;



	if (S_ISDIR(inode->i_mode))

		return -ENODEV;



	if (mode & FALLOC_FL_KEEP_SIZE)

		change_size = 0;



	sr.l_whence = 0;

	sr.l_start = (s64)offset;

	sr.l_len = (s64)len;



	return __ocfs2_change_file_space(NULL, inode, offset,

					 OCFS2_IOC_RESVSP64, &sr, change_size);

}



static int ocfs2_prepare_inode_for_write(struct dentry *dentry,

					 loff_t *ppos,

					 size_t count,
@@ -2312,6 +2352,7 @@ const struct inode_operations ocfs2_file_iops = { 
	.setattr	= ocfs2_setattr,

	.getattr	= ocfs2_getattr,

	.permission	= ocfs2_permission,

	.fallocate	= ocfs2_fallocate,

};



const struct inode_operations ocfs2_special_file_iops = {