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libceph, ceph: change ceph_calc_file_object_mapping() signature 

- make it void
- xlen (object extent length) out parameter should be u32 because only
  a single stripe unit is mapped at a time

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Alex Elder <elder@linaro.org>
This commit is contained in:
Ilya Dryomov 2018-02-17 09:29:58 +01:00
parent db2196a589
commit dccbf08005
5 changed files with 18 additions and 32 deletions
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16
fs/ceph/addr.c
View File

@ -945,19 +945,15 @@ static int ceph_writepages_start(struct address_space *mapping,
if (locked_pages == 0) {
u64 objnum;
u64 objoff;
u32 xlen;
/* prepare async write request */
offset = (u64)page_offset(page);
len = wsize;
rc = ceph_calc_file_object_mapping(&ci->i_layout,
offset, len,
&objnum, &objoff,
&len);
if (rc < 0) {
unlock_page(page);
break;
}
ceph_calc_file_object_mapping(&ci->i_layout,
offset, wsize,
&objnum, &objoff,
&xlen);
len = xlen;
num_ops = 1;
strip_unit_end = page->index +

11
fs/ceph/ioctl.c
View File

@ -185,7 +185,7 @@ static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg)
&ceph_sb_to_client(inode->i_sb)->client->osdc;
struct ceph_object_locator oloc;
CEPH_DEFINE_OID_ONSTACK(oid);
u64 len = 1, olen;
u32 xlen;
u64 tmp;
struct ceph_pg pgid;
int r;
@ -195,13 +195,8 @@ static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg)
return -EFAULT;
down_read(&osdc->lock);
r = ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, len,
&dl.object_no, &dl.object_offset,
&olen);
if (r < 0) {
up_read(&osdc->lock);
return -EIO;
}
ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, 1,
&dl.object_no, &dl.object_offset, &xlen);
dl.file_offset -= dl.object_offset;
dl.object_size = ci->i_layout.object_size;
dl.block_size = ci->i_layout.stripe_unit;

7
include/linux/ceph/osdmap.h
View File

@ -280,10 +280,9 @@ bool ceph_osds_changed(const struct ceph_osds *old_acting,
const struct ceph_osds *new_acting,
bool any_change);
/* calculate mapping of a file extent to an object */
extern int ceph_calc_file_object_mapping(struct ceph_file_layout *layout,
u64 off, u64 len,
u64 *bno, u64 *oxoff, u64 *oxlen);
void ceph_calc_file_object_mapping(struct ceph_file_layout *l,
u64 off, u64 len,
u64 *objno, u64 *objoff, u32 *xlen);
int __ceph_object_locator_to_pg(struct ceph_pg_pool_info *pi,
const struct ceph_object_id *oid,

10
net/ceph/osd_client.c
View File

@ -103,13 +103,12 @@ static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen,
u64 *objnum, u64 *objoff, u64 *objlen)
{
u64 orig_len = *plen;
int r;
u32 xlen;
/* object extent? */
r = ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
objoff, objlen);
if (r < 0)
return r;
ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
objoff, &xlen);
*objlen = xlen;
if (*objlen < orig_len) {
*plen = *objlen;
dout(" skipping last %llu, final file extent %llu~%llu\n",
@ -117,7 +116,6 @@ static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen,
}
dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen);
return 0;
}

6
net/ceph/osdmap.c
View File

@ -2153,9 +2153,9 @@ bool ceph_osds_changed(const struct ceph_osds *old_acting,
* objno | 0 | 1 | 2 | 3 | 4
* objsetno | 0 | 1
*/
int ceph_calc_file_object_mapping(struct ceph_file_layout *l,
void ceph_calc_file_object_mapping(struct ceph_file_layout *l,
u64 off, u64 len,
u64 *objno, u64 *objoff, u64 *xlen)
u64 *objno, u64 *objoff, u32 *xlen)
{
u32 stripes_per_object = l->object_size / l->stripe_unit;
u64 blockno; /* which su in the file (i.e. globally) */
@ -2173,8 +2173,6 @@ int ceph_calc_file_object_mapping(struct ceph_file_layout *l,
*objno = objsetno * l->stripe_count + stripepos;
*objoff = objsetpos * l->stripe_unit + blockoff;
*xlen = min_t(u64, len, l->stripe_unit - blockoff);
return 0;
}
EXPORT_SYMBOL(ceph_calc_file_object_mapping);