I've applied this to the testing branch and moved to the better fsx in the
qa suite.
The ceph-fuse patches are still in wip-fallocate until I can run the fs
test suite against them.
Thanks!
sage
On Thu, 15 Aug 2013, Li Wang wrote:
> This patch implements fallocate and punch hole support for Ceph kernel client.
>
> Signed-off-by: Li Wang <liw...@ubuntukylin.com>
> Signed-off-by: Yunchuan Wen <yunchuan...@ubuntukylin.com>
> ---
> Against v3:
>
> Passed the fsx test from xfstests.
>
> Truncate rather than delete the first object. Thanks go to Sage and Zheng for
> the explanation.
>
> Silence the OSD ENOENT complaints.
> ---
> fs/ceph/file.c | 196
> +++++++++++++++++++++++++++++++++++++++++++++++++
> net/ceph/osd_client.c | 11 ++-
> 2 files changed, 205 insertions(+), 2 deletions(-)
>
> diff --git a/fs/ceph/file.c b/fs/ceph/file.c
> index 2ddf061..e2bcd5c 100644
> --- a/fs/ceph/file.c
> +++ b/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"
> @@ -871,6 +872,200 @@ 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,
> @@ -887,5 +1082,6 @@ const struct file_operations ceph_file_fops = {
> .splice_write = generic_file_splice_write,
> .unlocked_ioctl = ceph_ioctl,
> .compat_ioctl = ceph_ioctl,
> + .fallocate = ceph_fallocate,
> };
>
> diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
> index dd47889..c1d15ab 100644
> --- a/net/ceph/osd_client.c
> +++ b/net/ceph/osd_client.c
> @@ -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);
> --
> 1.7.9.5
>
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