Commit 31c542a1 authored by Yan, Zheng's avatar Yan, Zheng Committed by Ilya Dryomov
Browse files

ceph: add inline data to pagecache 



Request reply and cap message can contain inline data. add inline data
to the page cache if there is Fc cap.

Signed-off-by: default avatarYan, Zheng <zyan@redhat.com>
parent fb01d1f8

fs/ceph/addr.c

+43 −0
Original line number Diff line number Diff line
@@ -1318,6 +1318,49 @@ out: 
	return ret;

}



void ceph_fill_inline_data(struct inode *inode, struct page *locked_page,

			   char	*data, size_t len)

{

	struct address_space *mapping = inode->i_mapping;

	struct page *page;



	if (locked_page) {

		page = locked_page;

	} else {

		if (i_size_read(inode) == 0)

			return;

		page = find_or_create_page(mapping, 0,

					   mapping_gfp_mask(mapping) & ~__GFP_FS);

		if (!page)

			return;

		if (PageUptodate(page)) {

			unlock_page(page);

			page_cache_release(page);

			return;

		}

	}



	dout("fill_inline_data %p %llx.%llx len %lu locked_page %p\n",

	     inode, ceph_vinop(inode), len, locked_page);



	if (len > 0) {

		void *kaddr = kmap_atomic(page);

		memcpy(kaddr, data, len);

		kunmap_atomic(kaddr);

	}



	if (page != locked_page) {

		if (len < PAGE_CACHE_SIZE)

			zero_user_segment(page, len, PAGE_CACHE_SIZE);

		else

			flush_dcache_page(page);



		SetPageUptodate(page);

		unlock_page(page);

		page_cache_release(page);

	}

}



static struct vm_operations_struct ceph_vmops = {

	.fault		= ceph_filemap_fault,

	.page_mkwrite	= ceph_page_mkwrite,

fs/ceph/caps.c

+11 −0
Original line number Diff line number Diff line
@@ -2405,6 +2405,7 @@ static void handle_cap_grant(struct ceph_mds_client *mdsc, 
	bool queue_invalidate = false;

	bool queue_revalidate = false;

	bool deleted_inode = false;

	bool fill_inline = false;



	dout("handle_cap_grant inode %p cap %p mds%d seq %d %s\n",

	     inode, cap, mds, seq, ceph_cap_string(newcaps));
@@ -2578,6 +2579,13 @@ static void handle_cap_grant(struct ceph_mds_client *mdsc, 
	}

	BUG_ON(cap->issued & ~cap->implemented);



	if (inline_version > 0 && inline_version >= ci->i_inline_version) {

		ci->i_inline_version = inline_version;

		if (ci->i_inline_version != CEPH_INLINE_NONE &&

		    (newcaps & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)))

			fill_inline = true;

	}



	spin_unlock(&ci->i_ceph_lock);



	if (le32_to_cpu(grant->op) == CEPH_CAP_OP_IMPORT) {
@@ -2591,6 +2599,9 @@ static void handle_cap_grant(struct ceph_mds_client *mdsc, 
			wake = true;

	}



	if (fill_inline)

		ceph_fill_inline_data(inode, NULL, inline_data, inline_len);



	if (queue_trunc) {

		ceph_queue_vmtruncate(inode);

		ceph_queue_revalidate(inode);

fs/ceph/inode.c

+16 −0
Original line number Diff line number Diff line
@@ -387,6 +387,7 @@ struct inode *ceph_alloc_inode(struct super_block *sb) 
	spin_lock_init(&ci->i_ceph_lock);



	ci->i_version = 0;

	ci->i_inline_version = 0;

	ci->i_time_warp_seq = 0;

	ci->i_ceph_flags = 0;

	ci->i_ordered_count = 0;
@@ -676,6 +677,7 @@ static int fill_inode(struct inode *inode, 
	bool wake = false;

	bool queue_trunc = false;

	bool new_version = false;

	bool fill_inline = false;



	dout("fill_inode %p ino %llx.%llx v %llu had %llu\n",

	     inode, ceph_vinop(inode), le64_to_cpu(info->version),
@@ -875,8 +877,22 @@ static int fill_inode(struct inode *inode, 
			   ceph_vinop(inode));

		__ceph_get_fmode(ci, cap_fmode);

	}



	if (iinfo->inline_version > 0 &&

	    iinfo->inline_version >= ci->i_inline_version) {

		int cache_caps = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO;

		ci->i_inline_version = iinfo->inline_version;

		if (ci->i_inline_version != CEPH_INLINE_NONE &&

		    (le32_to_cpu(info->cap.caps) & cache_caps))

			fill_inline = true;

	}



	spin_unlock(&ci->i_ceph_lock);



	if (fill_inline)

		ceph_fill_inline_data(inode, NULL,

				      iinfo->inline_data, iinfo->inline_len);



	if (wake)

		wake_up_all(&ci->i_cap_wq);

fs/ceph/super.h

+4 −1
Original line number Diff line number Diff line
@@ -253,6 +253,7 @@ struct ceph_inode_info { 
	spinlock_t i_ceph_lock;



	u64 i_version;

	u64 i_inline_version;

	u32 i_time_warp_seq;



	unsigned i_ceph_flags;
@@ -858,7 +859,7 @@ extern int ceph_encode_dentry_release(void **p, struct dentry *dn, 
				      int mds, int drop, int unless);



extern int ceph_get_caps(struct ceph_inode_info *ci, int need, int want,

			 int *got, loff_t endoff);

			 loff_t endoff, int *got, struct page **pinned_page);



/* for counting open files by mode */

static inline void __ceph_get_fmode(struct ceph_inode_info *ci, int mode)
@@ -880,6 +881,8 @@ extern int ceph_atomic_open(struct inode *dir, struct dentry *dentry, 
			    struct file *file, unsigned flags, umode_t mode,

			    int *opened);

extern int ceph_release(struct inode *inode, struct file *filp);

extern void ceph_fill_inline_data(struct inode *inode, struct page *locked_page,

				  char *data, size_t len);



/* dir.c */

extern const struct file_operations ceph_dir_fops;

fs/ceph/super.h.rej

0 → 100644
+10 −0
Original line number Diff line number Diff line 
--- fs/ceph/super.h

+++ fs/ceph/super.h

@@ -254,6 +255,7 @@

	spinlock_t i_ceph_lock;



	u64 i_version;

+	u64 i_inline_version;

	u32 i_time_warp_seq;



	unsigned i_ceph_flags;