ceph: punch hole support
This patch implements fallocate and punch hole support for Ceph kernel client. Signed-off-by: Li Wang <liwang@ubuntukylin.com> Signed-off-by: Yunchuan Wen <yunchuanwen@ubuntukylin.com>
This commit is contained in:
Li Wang
Sage Weil
parent
3871cbb9a4
commit
ad7a60de88
196
fs/ceph/file.c
196
fs/ceph/file.c
@ -8,6 +8,7 @@
|
||||
#include <linux/namei.h>
|
||||
#include <linux/writeback.h>
|
||||
#include <linux/aio.h>
|
||||
#include <linux/falloc.h>
|
||||
|
||||
#include "super.h"
|
||||
#include "mds_client.h"
|
||||
@ -874,6 +875,200 @@ out:
|
||||
return offset;
|
||||
}
|
||||
|
||||
static inline void ceph_zero_partial_page(
|
||||
struct inode *inode, loff_t offset, unsigned size)
|
||||
{
|
||||
struct page *page;
|
||||
pgoff_t index = offset >> PAGE_CACHE_SHIFT;
|
||||
|
||||
page = find_lock_page(inode->i_mapping, index);
|
||||
if (page) {
|
||||
wait_on_page_writeback(page);
|
||||
zero_user(page, offset & (PAGE_CACHE_SIZE - 1), size);
|
||||
unlock_page(page);
|
||||
page_cache_release(page);
|
||||
}
|
||||
}
|
||||
|
||||
static void ceph_zero_pagecache_range(struct inode *inode, loff_t offset,
|
||||
loff_t length)
|
||||
{
|
||||
loff_t nearly = round_up(offset, PAGE_CACHE_SIZE);
|
||||
if (offset < nearly) {
|
||||
loff_t size = nearly - offset;
|
||||
if (length < size)
|
||||
size = length;
|
||||
ceph_zero_partial_page(inode, offset, size);
|
||||
offset += size;
|
||||
length -= size;
|
||||
}
|
||||
if (length >= PAGE_CACHE_SIZE) {
|
||||
loff_t size = round_down(length, PAGE_CACHE_SIZE);
|
||||
truncate_pagecache_range(inode, offset, offset + size - 1);
|
||||
offset += size;
|
||||
length -= size;
|
||||
}
|
||||
if (length)
|
||||
ceph_zero_partial_page(inode, offset, length);
|
||||
}
|
||||
|
||||
static int ceph_zero_partial_object(struct inode *inode,
|
||||
loff_t offset, loff_t *length)
|
||||
{
|
||||
struct ceph_inode_info *ci = ceph_inode(inode);
|
||||
struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
|
||||
struct ceph_osd_request *req;
|
||||
int ret = 0;
|
||||
loff_t zero = 0;
|
||||
int op;
|
||||
|
||||
if (!length) {
|
||||
op = offset ? CEPH_OSD_OP_DELETE : CEPH_OSD_OP_TRUNCATE;
|
||||
length = &zero;
|
||||
} else {
|
||||
op = CEPH_OSD_OP_ZERO;
|
||||
}
|
||||
|
||||
req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout,
|
||||
ceph_vino(inode),
|
||||
offset, length,
|
||||
1, op,
|
||||
CEPH_OSD_FLAG_WRITE |
|
||||
CEPH_OSD_FLAG_ONDISK,
|
||||
NULL, 0, 0, false);
|
||||
if (IS_ERR(req)) {
|
||||
ret = PTR_ERR(req);
|
||||
goto out;
|
||||
}
|
||||
|
||||
ceph_osdc_build_request(req, offset, NULL, ceph_vino(inode).snap,
|
||||
&inode->i_mtime);
|
||||
|
||||
ret = ceph_osdc_start_request(&fsc->client->osdc, req, false);
|
||||
if (!ret) {
|
||||
ret = ceph_osdc_wait_request(&fsc->client->osdc, req);
|
||||
if (ret == -ENOENT)
|
||||
ret = 0;
|
||||
}
|
||||
ceph_osdc_put_request(req);
|
||||
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int ceph_zero_objects(struct inode *inode, loff_t offset, loff_t length)
|
||||
{
|
||||
int ret = 0;
|
||||
struct ceph_inode_info *ci = ceph_inode(inode);
|
||||
__s32 stripe_unit = ceph_file_layout_su(ci->i_layout);
|
||||
__s32 stripe_count = ceph_file_layout_stripe_count(ci->i_layout);
|
||||
__s32 object_size = ceph_file_layout_object_size(ci->i_layout);
|
||||
loff_t object_set_size = (loff_t)object_size * stripe_count;
|
||||
|
||||
loff_t nearly = (offset + object_set_size - 1)
|
||||
/ object_set_size * object_set_size;
|
||||
while (length && offset < nearly) {
|
||||
loff_t size = length;
|
||||
ret = ceph_zero_partial_object(inode, offset, &size);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
offset += size;
|
||||
length -= size;
|
||||
}
|
||||
while (length >= object_set_size) {
|
||||
int i;
|
||||
loff_t pos = offset;
|
||||
for (i = 0; i < stripe_count; ++i) {
|
||||
ret = ceph_zero_partial_object(inode, pos, NULL);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
pos += stripe_unit;
|
||||
}
|
||||
offset += object_set_size;
|
||||
length -= object_set_size;
|
||||
}
|
||||
while (length) {
|
||||
loff_t size = length;
|
||||
ret = ceph_zero_partial_object(inode, offset, &size);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
offset += size;
|
||||
length -= size;
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
static long ceph_fallocate(struct file *file, int mode,
|
||||
loff_t offset, loff_t length)
|
||||
{
|
||||
struct ceph_file_info *fi = file->private_data;
|
||||
struct inode *inode = file->f_dentry->d_inode;
|
||||
struct ceph_inode_info *ci = ceph_inode(inode);
|
||||
struct ceph_osd_client *osdc =
|
||||
&ceph_inode_to_client(inode)->client->osdc;
|
||||
int want, got = 0;
|
||||
int dirty;
|
||||
int ret = 0;
|
||||
loff_t endoff = 0;
|
||||
loff_t size;
|
||||
|
||||
if (!S_ISREG(inode->i_mode))
|
||||
return -EOPNOTSUPP;
|
||||
|
||||
if (IS_SWAPFILE(inode))
|
||||
return -ETXTBSY;
|
||||
|
||||
mutex_lock(&inode->i_mutex);
|
||||
|
||||
if (ceph_snap(inode) != CEPH_NOSNAP) {
|
||||
ret = -EROFS;
|
||||
goto unlock;
|
||||
}
|
||||
|
||||
if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) &&
|
||||
!(mode & FALLOC_FL_PUNCH_HOLE)) {
|
||||
ret = -ENOSPC;
|
||||
goto unlock;
|
||||
}
|
||||
|
||||
size = i_size_read(inode);
|
||||
if (!(mode & FALLOC_FL_KEEP_SIZE))
|
||||
endoff = offset + length;
|
||||
|
||||
if (fi->fmode & CEPH_FILE_MODE_LAZY)
|
||||
want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO;
|
||||
else
|
||||
want = CEPH_CAP_FILE_BUFFER;
|
||||
|
||||
ret = ceph_get_caps(ci, CEPH_CAP_FILE_WR, want, &got, endoff);
|
||||
if (ret < 0)
|
||||
goto unlock;
|
||||
|
||||
if (mode & FALLOC_FL_PUNCH_HOLE) {
|
||||
if (offset < size)
|
||||
ceph_zero_pagecache_range(inode, offset, length);
|
||||
ret = ceph_zero_objects(inode, offset, length);
|
||||
} else if (endoff > size) {
|
||||
truncate_pagecache_range(inode, size, -1);
|
||||
if (ceph_inode_set_size(inode, endoff))
|
||||
ceph_check_caps(ceph_inode(inode),
|
||||
CHECK_CAPS_AUTHONLY, NULL);
|
||||
}
|
||||
|
||||
if (!ret) {
|
||||
spin_lock(&ci->i_ceph_lock);
|
||||
dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR);
|
||||
spin_unlock(&ci->i_ceph_lock);
|
||||
if (dirty)
|
||||
__mark_inode_dirty(inode, dirty);
|
||||
}
|
||||
|
||||
ceph_put_cap_refs(ci, got);
|
||||
unlock:
|
||||
mutex_unlock(&inode->i_mutex);
|
||||
return ret;
|
||||
}
|
||||
|
||||
const struct file_operations ceph_file_fops = {
|
||||
.open = ceph_open,
|
||||
.release = ceph_release,
|
||||
@ -890,5 +1085,6 @@ const struct file_operations ceph_file_fops = {
|
||||
.splice_write = generic_file_splice_write,
|
||||
.unlocked_ioctl = ceph_ioctl,
|
||||
.compat_ioctl = ceph_ioctl,
|
||||
.fallocate = ceph_fallocate,
|
||||
};
|
||||
|
||||
|
||||
@ -503,7 +503,9 @@ void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
|
||||
struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
|
||||
size_t payload_len = 0;
|
||||
|
||||
BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE);
|
||||
BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
|
||||
opcode != CEPH_OSD_OP_DELETE && opcode != CEPH_OSD_OP_ZERO &&
|
||||
opcode != CEPH_OSD_OP_TRUNCATE);
|
||||
|
||||
op->extent.offset = offset;
|
||||
op->extent.length = length;
|
||||
@ -631,6 +633,9 @@ static u64 osd_req_encode_op(struct ceph_osd_request *req,
|
||||
break;
|
||||
case CEPH_OSD_OP_READ:
|
||||
case CEPH_OSD_OP_WRITE:
|
||||
case CEPH_OSD_OP_ZERO:
|
||||
case CEPH_OSD_OP_DELETE:
|
||||
case CEPH_OSD_OP_TRUNCATE:
|
||||
if (src->op == CEPH_OSD_OP_WRITE)
|
||||
request_data_len = src->extent.length;
|
||||
dst->extent.offset = cpu_to_le64(src->extent.offset);
|
||||
@ -715,7 +720,9 @@ struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
|
||||
u64 object_base;
|
||||
int r;
|
||||
|
||||
BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE);
|
||||
BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
|
||||
opcode != CEPH_OSD_OP_DELETE && opcode != CEPH_OSD_OP_ZERO &&
|
||||
opcode != CEPH_OSD_OP_TRUNCATE);
|
||||
|
||||
req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
|
||||
GFP_NOFS);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user