lkml.org 
[lkml]   [2011]   [Oct]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 01/24] GFS2: Clean up dir hash table reading
Date
Since there is now only a single caller to gfs2_dir_read_data()
and it has a number of constant arguments, we can factor
those out. Also some tests relating to the inode size were
being done twice.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

diff --git a/fs/gfs2/dir.c b/fs/gfs2/dir.c
index 1cc2f8e..2045d70 100644
--- a/fs/gfs2/dir.c
+++ b/fs/gfs2/dir.c
@@ -240,16 +240,15 @@ fail:
return error;
}

-static int gfs2_dir_read_stuffed(struct gfs2_inode *ip, char *buf,
- u64 offset, unsigned int size)
+static int gfs2_dir_read_stuffed(struct gfs2_inode *ip, __be64 *buf,
+ unsigned int size)
{
struct buffer_head *dibh;
int error;

error = gfs2_meta_inode_buffer(ip, &dibh);
if (!error) {
- offset += sizeof(struct gfs2_dinode);
- memcpy(buf, dibh->b_data + offset, size);
+ memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size);
brelse(dibh);
}

@@ -261,13 +260,12 @@ static int gfs2_dir_read_stuffed(struct gfs2_inode *ip, char *buf,
* gfs2_dir_read_data - Read a data from a directory inode
* @ip: The GFS2 Inode
* @buf: The buffer to place result into
- * @offset: File offset to begin jdata_readng from
* @size: Amount of data to transfer
*
* Returns: The amount of data actually copied or the error
*/
-static int gfs2_dir_read_data(struct gfs2_inode *ip, char *buf, u64 offset,
- unsigned int size, unsigned ra)
+static int gfs2_dir_read_data(struct gfs2_inode *ip, __be64 *buf,
+ unsigned int size)
{
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
u64 lblock, dblock;
@@ -275,24 +273,14 @@ static int gfs2_dir_read_data(struct gfs2_inode *ip, char *buf, u64 offset,
unsigned int o;
int copied = 0;
int error = 0;
- u64 disksize = i_size_read(&ip->i_inode);
-
- if (offset >= disksize)
- return 0;
-
- if (offset + size > disksize)
- size = disksize - offset;
-
- if (!size)
- return 0;

if (gfs2_is_stuffed(ip))
- return gfs2_dir_read_stuffed(ip, buf, offset, size);
+ return gfs2_dir_read_stuffed(ip, buf, size);

if (gfs2_assert_warn(sdp, gfs2_is_jdata(ip)))
return -EINVAL;

- lblock = offset;
+ lblock = 0;
o = do_div(lblock, sdp->sd_jbsize) + sizeof(struct gfs2_meta_header);

while (copied < size) {
@@ -311,8 +299,6 @@ static int gfs2_dir_read_data(struct gfs2_inode *ip, char *buf, u64 offset,
if (error || !dblock)
goto fail;
BUG_ON(extlen < 1);
- if (!ra)
- extlen = 1;
bh = gfs2_meta_ra(ip->i_gl, dblock, extlen);
} else {
error = gfs2_meta_read(ip->i_gl, dblock, DIO_WAIT, &bh);
@@ -328,7 +314,7 @@ static int gfs2_dir_read_data(struct gfs2_inode *ip, char *buf, u64 offset,
extlen--;
memcpy(buf, bh->b_data + o, amount);
brelse(bh);
- buf += amount;
+ buf += (amount/sizeof(__be64));
copied += amount;
lblock++;
o = sizeof(struct gfs2_meta_header);
@@ -371,7 +357,7 @@ static __be64 *gfs2_dir_get_hash_table(struct gfs2_inode *ip)
if (hc == NULL)
return ERR_PTR(-ENOMEM);

- ret = gfs2_dir_read_data(ip, (char *)hc, 0, hsize, 1);
+ ret = gfs2_dir_read_data(ip, hc, hsize);
if (ret < 0) {
kfree(hc);
return ERR_PTR(ret);
--
1.7.4.4


\
 
 \ /
  Last update: 2011-10-24 14:51    [W:0.151 / U:1.516 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site