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GFS2: Simplify gfs2_write_alloc_required

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Function gfs2_write_alloc_required always returned zero as its
return code.  Therefore, it doesn't need to return a return code
at all.  Given that, we can use the return value to return whether
or not the dinode needs block allocations rather than passing
that value in, which in turn simplifies a bunch of error checking.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Bob Peterson 2010-06-24 19:21:20 -04:00 committed by Steven Whitehouse
parent ba6e93645f
commit 461cb419f0
6 changed files with 14 additions and 35 deletions
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4
fs/gfs2/aops.c
View File

@ -634,9 +634,7 @@ static int gfs2_write_begin(struct file *file, struct address_space *mapping,
}
}
error = gfs2_write_alloc_required(ip, pos, len, &alloc_required);
if (error)
goto out_unlock;
alloc_required = gfs2_write_alloc_required(ip, pos, len);
if (alloc_required || gfs2_is_jdata(ip))
gfs2_write_calc_reserv(ip, len, &data_blocks, &ind_blocks);

15
fs/gfs2/bmap.c
View File

@ -1244,13 +1244,12 @@ int gfs2_file_dealloc(struct gfs2_inode *ip)
* @ip: the file being written to
* @offset: the offset to write to
* @len: the number of bytes being written
* @alloc_required: set to 1 if an alloc is required, 0 otherwise
*
* Returns: errno
* Returns: 1 if an alloc is required, 0 otherwise
*/
int gfs2_write_alloc_required(struct gfs2_inode *ip, u64 offset,
unsigned int len, int *alloc_required)
unsigned int len)
{
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
struct buffer_head bh;
@ -1258,26 +1257,23 @@ int gfs2_write_alloc_required(struct gfs2_inode *ip, u64 offset,
u64 lblock, lblock_stop, size;
u64 end_of_file;
*alloc_required = 0;
if (!len)
return 0;
if (gfs2_is_stuffed(ip)) {
if (offset + len >
sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode))
*alloc_required = 1;
return 1;
return 0;
}
*alloc_required = 1;
shift = sdp->sd_sb.sb_bsize_shift;
BUG_ON(gfs2_is_dir(ip));
end_of_file = (ip->i_disksize + sdp->sd_sb.sb_bsize - 1) >> shift;
lblock = offset >> shift;
lblock_stop = (offset + len + sdp->sd_sb.sb_bsize - 1) >> shift;
if (lblock_stop > end_of_file)
return 0;
return 1;
size = (lblock_stop - lblock) << shift;
do {
@ -1285,12 +1281,11 @@ int gfs2_write_alloc_required(struct gfs2_inode *ip, u64 offset,
bh.b_size = size;
gfs2_block_map(&ip->i_inode, lblock, &bh, 0);
if (!buffer_mapped(&bh))
return 0;
return 1;
size -= bh.b_size;
lblock += (bh.b_size >> ip->i_inode.i_blkbits);
} while(size > 0);
*alloc_required = 0;
return 0;
}

2
fs/gfs2/bmap.h
View File

@ -52,6 +52,6 @@ int gfs2_truncatei(struct gfs2_inode *ip, u64 size);
int gfs2_truncatei_resume(struct gfs2_inode *ip);
int gfs2_file_dealloc(struct gfs2_inode *ip);
int gfs2_write_alloc_required(struct gfs2_inode *ip, u64 offset,
unsigned int len, int *alloc_required);
unsigned int len);
#endif /* __BMAP_DOT_H__ */

4
fs/gfs2/file.c
View File

@ -351,7 +351,6 @@ static int gfs2_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
unsigned long last_index;
u64 pos = page->index << PAGE_CACHE_SHIFT;
unsigned int data_blocks, ind_blocks, rblocks;
int alloc_required = 0;
struct gfs2_holder gh;
struct gfs2_alloc *al;
int ret;
@ -364,8 +363,7 @@ static int gfs2_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
set_bit(GLF_DIRTY, &ip->i_gl->gl_flags);
set_bit(GIF_SW_PAGED, &ip->i_flags);
ret = gfs2_write_alloc_required(ip, pos, PAGE_CACHE_SIZE, &alloc_required);
if (ret || !alloc_required)
if (!gfs2_write_alloc_required(ip, pos, PAGE_CACHE_SIZE))
goto out_unlock;
ret = -ENOMEM;
al = gfs2_alloc_get(ip);

15
fs/gfs2/quota.c
View File

@ -787,15 +787,9 @@ static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda)
goto out;
for (x = 0; x < num_qd; x++) {
int alloc_required;
offset = qd2offset(qda[x]);
error = gfs2_write_alloc_required(ip, offset,
sizeof(struct gfs2_quota),
&alloc_required);
if (error)
goto out_gunlock;
if (alloc_required)
if (gfs2_write_alloc_required(ip, offset,
sizeof(struct gfs2_quota)))
nalloc++;
}
@ -1584,10 +1578,7 @@ static int gfs2_set_dqblk(struct super_block *sb, int type, qid_t id,
goto out_i;
offset = qd2offset(qd);
error = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota),
&alloc_required);
if (error)
goto out_i;
alloc_required = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota));
if (alloc_required) {
al = gfs2_alloc_get(ip);
if (al == NULL)

9
fs/gfs2/super.c
View File

@ -342,8 +342,6 @@ int gfs2_jdesc_check(struct gfs2_jdesc *jd)
{
struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
int ar;
int error;
if (ip->i_disksize < (8 << 20) || ip->i_disksize > (1 << 30) ||
(ip->i_disksize & (sdp->sd_sb.sb_bsize - 1))) {
@ -352,13 +350,12 @@ int gfs2_jdesc_check(struct gfs2_jdesc *jd)
}
jd->jd_blocks = ip->i_disksize >> sdp->sd_sb.sb_bsize_shift;
error = gfs2_write_alloc_required(ip, 0, ip->i_disksize, &ar);
if (!error && ar) {
if (gfs2_write_alloc_required(ip, 0, ip->i_disksize)) {
gfs2_consist_inode(ip);
error = -EIO;
return -EIO;
}
return error;
return 0;
}
/**