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Diffstat (limited to 'fs/ceph/addr.c')
-rw-r--r--fs/ceph/addr.c142
1 files changed, 98 insertions, 44 deletions
diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index ef3ebd780aff..1a3e1b40799a 100644
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -8,6 +8,7 @@
#include <linux/slab.h>
#include <linux/pagevec.h>
#include <linux/task_io_accounting_ops.h>
+#include <linux/signal.h>
#include "super.h"
#include "mds_client.h"
@@ -315,7 +316,32 @@ static int start_read(struct inode *inode, struct list_head *page_list, int max)
struct page **pages;
pgoff_t next_index;
int nr_pages = 0;
- int ret;
+ int got = 0;
+ int ret = 0;
+
+ if (!current->journal_info) {
+ /* caller of readpages does not hold buffer and read caps
+ * (fadvise, madvise and readahead cases) */
+ int want = CEPH_CAP_FILE_CACHE;
+ ret = ceph_try_get_caps(ci, CEPH_CAP_FILE_RD, want, &got);
+ if (ret < 0) {
+ dout("start_read %p, error getting cap\n", inode);
+ } else if (!(got & want)) {
+ dout("start_read %p, no cache cap\n", inode);
+ ret = 0;
+ }
+ if (ret <= 0) {
+ if (got)
+ ceph_put_cap_refs(ci, got);
+ while (!list_empty(page_list)) {
+ page = list_entry(page_list->prev,
+ struct page, lru);
+ list_del(&page->lru);
+ put_page(page);
+ }
+ return ret;
+ }
+ }
off = (u64) page_offset(page);
@@ -338,15 +364,18 @@ static int start_read(struct inode *inode, struct list_head *page_list, int max)
CEPH_OSD_FLAG_READ, NULL,
ci->i_truncate_seq, ci->i_truncate_size,
false);
- if (IS_ERR(req))
- return PTR_ERR(req);
+ if (IS_ERR(req)) {
+ ret = PTR_ERR(req);
+ goto out;
+ }
/* build page vector */
nr_pages = calc_pages_for(0, len);
pages = kmalloc(sizeof(*pages) * nr_pages, GFP_KERNEL);
- ret = -ENOMEM;
- if (!pages)
- goto out;
+ if (!pages) {
+ ret = -ENOMEM;
+ goto out_put;
+ }
for (i = 0; i < nr_pages; ++i) {
page = list_entry(page_list->prev, struct page, lru);
BUG_ON(PageLocked(page));
@@ -363,6 +392,7 @@ static int start_read(struct inode *inode, struct list_head *page_list, int max)
nr_pages = i;
if (nr_pages > 0) {
len = nr_pages << PAGE_SHIFT;
+ osd_req_op_extent_update(req, 0, len);
break;
}
goto out_pages;
@@ -378,6 +408,12 @@ static int start_read(struct inode *inode, struct list_head *page_list, int max)
if (ret < 0)
goto out_pages;
ceph_osdc_put_request(req);
+
+ /* After adding locked pages to page cache, the inode holds cache cap.
+ * So we can drop our cap refs. */
+ if (got)
+ ceph_put_cap_refs(ci, got);
+
return nr_pages;
out_pages:
@@ -386,8 +422,11 @@ out_pages:
unlock_page(pages[i]);
}
ceph_put_page_vector(pages, nr_pages, false);
-out:
+out_put:
ceph_osdc_put_request(req);
+out:
+ if (got)
+ ceph_put_cap_refs(ci, got);
return ret;
}
@@ -424,7 +463,6 @@ static int ceph_readpages(struct file *file, struct address_space *mapping,
rc = start_read(inode, page_list, max);
if (rc < 0)
goto out;
- BUG_ON(rc == 0);
}
out:
ceph_fscache_readpages_cancel(inode, page_list);
@@ -438,7 +476,9 @@ out:
* only snap context we are allowed to write back.
*/
static struct ceph_snap_context *get_oldest_context(struct inode *inode,
- loff_t *snap_size)
+ loff_t *snap_size,
+ u64 *truncate_size,
+ u32 *truncate_seq)
{
struct ceph_inode_info *ci = ceph_inode(inode);
struct ceph_snap_context *snapc = NULL;
@@ -452,6 +492,10 @@ static struct ceph_snap_context *get_oldest_context(struct inode *inode,
snapc = ceph_get_snap_context(capsnap->context);
if (snap_size)
*snap_size = capsnap->size;
+ if (truncate_size)
+ *truncate_size = capsnap->truncate_size;
+ if (truncate_seq)
+ *truncate_seq = capsnap->truncate_seq;
break;
}
}
@@ -459,6 +503,10 @@ static struct ceph_snap_context *get_oldest_context(struct inode *inode,
snapc = ceph_get_snap_context(ci->i_head_snapc);
dout(" head snapc %p has %d dirty pages\n",
snapc, ci->i_wrbuffer_ref_head);
+ if (truncate_size)
+ *truncate_size = ci->i_truncate_size;
+ if (truncate_seq)
+ *truncate_seq = ci->i_truncate_seq;
}
spin_unlock(&ci->i_ceph_lock);
return snapc;
@@ -501,7 +549,8 @@ static int writepage_nounlock(struct page *page, struct writeback_control *wbc)
dout("writepage %p page %p not dirty?\n", inode, page);
goto out;
}
- oldest = get_oldest_context(inode, &snap_size);
+ oldest = get_oldest_context(inode, &snap_size,
+ &truncate_size, &truncate_seq);
if (snapc->seq > oldest->seq) {
dout("writepage %p page %p snapc %p not writeable - noop\n",
inode, page, snapc);
@@ -512,12 +561,8 @@ static int writepage_nounlock(struct page *page, struct writeback_control *wbc)
}
ceph_put_snap_context(oldest);
- spin_lock(&ci->i_ceph_lock);
- truncate_seq = ci->i_truncate_seq;
- truncate_size = ci->i_truncate_size;
if (snap_size == -1)
snap_size = i_size_read(inode);
- spin_unlock(&ci->i_ceph_lock);
/* is this a partial page at end of file? */
if (page_off >= snap_size) {
@@ -708,7 +753,7 @@ static int ceph_writepages_start(struct address_space *mapping,
struct pagevec pvec;
int done = 0;
int rc = 0;
- unsigned wsize = 1 << inode->i_blkbits;
+ unsigned int wsize = i_blocksize(inode);
struct ceph_osd_request *req = NULL;
int do_sync = 0;
loff_t snap_size, i_size;
@@ -728,7 +773,7 @@ static int ceph_writepages_start(struct address_space *mapping,
wbc->sync_mode == WB_SYNC_NONE ? "NONE" :
(wbc->sync_mode == WB_SYNC_ALL ? "ALL" : "HOLD"));
- if (ACCESS_ONCE(fsc->mount_state) == CEPH_MOUNT_SHUTDOWN) {
+ if (READ_ONCE(fsc->mount_state) == CEPH_MOUNT_SHUTDOWN) {
if (ci->i_wrbuffer_ref > 0) {
pr_warn_ratelimited(
"writepage_start %p %lld forced umount\n",
@@ -764,7 +809,8 @@ retry:
/* find oldest snap context with dirty data */
ceph_put_snap_context(snapc);
snap_size = -1;
- snapc = get_oldest_context(inode, &snap_size);
+ snapc = get_oldest_context(inode, &snap_size,
+ &truncate_size, &truncate_seq);
if (!snapc) {
/* hmm, why does writepages get called when there
is no dirty data? */
@@ -774,11 +820,7 @@ retry:
dout(" oldest snapc is %p seq %lld (%d snaps)\n",
snapc, snapc->seq, snapc->num_snaps);
- spin_lock(&ci->i_ceph_lock);
- truncate_seq = ci->i_truncate_seq;
- truncate_size = ci->i_truncate_size;
i_size = i_size_read(inode);
- spin_unlock(&ci->i_ceph_lock);
if (last_snapc && snapc != last_snapc) {
/* if we switched to a newer snapc, restart our scan at the
@@ -977,8 +1019,7 @@ new_request:
&ci->i_layout, vino,
offset, &len, 0, num_ops,
CEPH_OSD_OP_WRITE,
- CEPH_OSD_FLAG_WRITE |
- CEPH_OSD_FLAG_ONDISK,
+ CEPH_OSD_FLAG_WRITE,
snapc, truncate_seq,
truncate_size, false);
if (IS_ERR(req)) {
@@ -988,8 +1029,7 @@ new_request:
min(num_ops,
CEPH_OSD_SLAB_OPS),
CEPH_OSD_OP_WRITE,
- CEPH_OSD_FLAG_WRITE |
- CEPH_OSD_FLAG_ONDISK,
+ CEPH_OSD_FLAG_WRITE,
snapc, truncate_seq,
truncate_size, true);
BUG_ON(IS_ERR(req));
@@ -1124,7 +1164,8 @@ out:
static int context_is_writeable_or_written(struct inode *inode,
struct ceph_snap_context *snapc)
{
- struct ceph_snap_context *oldest = get_oldest_context(inode, NULL);
+ struct ceph_snap_context *oldest = get_oldest_context(inode, NULL,
+ NULL, NULL);
int ret = !oldest || snapc->seq <= oldest->seq;
ceph_put_snap_context(oldest);
@@ -1153,7 +1194,7 @@ static int ceph_update_writeable_page(struct file *file,
int r;
struct ceph_snap_context *snapc, *oldest;
- if (ACCESS_ONCE(fsc->mount_state) == CEPH_MOUNT_SHUTDOWN) {
+ if (READ_ONCE(fsc->mount_state) == CEPH_MOUNT_SHUTDOWN) {
dout(" page %p forced umount\n", page);
unlock_page(page);
return -EIO;
@@ -1169,7 +1210,7 @@ retry_locked:
* this page is already dirty in another (older) snap
* context! is it writeable now?
*/
- oldest = get_oldest_context(inode, NULL);
+ oldest = get_oldest_context(inode, NULL, NULL, NULL);
if (snapc->seq > oldest->seq) {
ceph_put_snap_context(oldest);
@@ -1276,25 +1317,27 @@ static int ceph_write_end(struct file *file, struct address_space *mapping,
struct page *page, void *fsdata)
{
struct inode *inode = file_inode(file);
- unsigned from = pos & (PAGE_SIZE - 1);
int check_cap = 0;
dout("write_end file %p inode %p page %p %d~%d (%d)\n", file,
inode, page, (int)pos, (int)copied, (int)len);
/* zero the stale part of the page if we did a short copy */
- if (copied < len)
- zero_user_segment(page, from+copied, len);
+ if (!PageUptodate(page)) {
+ if (copied < len) {
+ copied = 0;
+ goto out;
+ }
+ SetPageUptodate(page);
+ }
/* did file size increase? */
if (pos+copied > i_size_read(inode))
check_cap = ceph_inode_set_size(inode, pos+copied);
- if (!PageUptodate(page))
- SetPageUptodate(page);
-
set_page_dirty(page);
+out:
unlock_page(page);
put_page(page);
@@ -1343,8 +1386,9 @@ static void ceph_restore_sigs(sigset_t *oldset)
/*
* vm ops
*/
-static int ceph_filemap_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
+static int ceph_filemap_fault(struct vm_fault *vmf)
{
+ struct vm_area_struct *vma = vmf->vma;
struct inode *inode = file_inode(vma->vm_file);
struct ceph_inode_info *ci = ceph_inode(inode);
struct ceph_file_info *fi = vma->vm_file->private_data;
@@ -1371,9 +1415,11 @@ static int ceph_filemap_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
inode, off, (size_t)PAGE_SIZE, ceph_cap_string(got));
if ((got & (CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO)) ||
- ci->i_inline_version == CEPH_INLINE_NONE)
- ret = filemap_fault(vma, vmf);
- else
+ ci->i_inline_version == CEPH_INLINE_NONE) {
+ current->journal_info = vma->vm_file;
+ ret = filemap_fault(vmf);
+ current->journal_info = NULL;
+ } else
ret = -EAGAIN;
dout("filemap_fault %p %llu~%zd dropping cap refs on %s ret %d\n",
@@ -1432,8 +1478,9 @@ out_restore:
/*
* Reuse write_begin here for simplicity.
*/
-static int ceph_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
+static int ceph_page_mkwrite(struct vm_fault *vmf)
{
+ struct vm_area_struct *vma = vmf->vma;
struct inode *inode = file_inode(vma->vm_file);
struct ceph_inode_info *ci = ceph_inode(inode);
struct ceph_file_info *fi = vma->vm_file->private_data;
@@ -1634,8 +1681,7 @@ int ceph_uninline_data(struct file *filp, struct page *locked_page)
req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout,
ceph_vino(inode), 0, &len, 0, 1,
- CEPH_OSD_OP_CREATE,
- CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
+ CEPH_OSD_OP_CREATE, CEPH_OSD_FLAG_WRITE,
NULL, 0, 0, false);
if (IS_ERR(req)) {
err = PTR_ERR(req);
@@ -1652,8 +1698,7 @@ int ceph_uninline_data(struct file *filp, struct page *locked_page)
req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout,
ceph_vino(inode), 0, &len, 1, 3,
- CEPH_OSD_OP_WRITE,
- CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
+ CEPH_OSD_OP_WRITE, CEPH_OSD_FLAG_WRITE,
NULL, ci->i_truncate_seq,
ci->i_truncate_size, false);
if (IS_ERR(req)) {
@@ -1826,7 +1871,7 @@ static int __ceph_pool_perm_get(struct ceph_inode_info *ci,
goto out_unlock;
}
- wr_req->r_flags = CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ACK;
+ wr_req->r_flags = CEPH_OSD_FLAG_WRITE;
osd_req_op_init(wr_req, 0, CEPH_OSD_OP_CREATE, CEPH_OSD_OP_FLAG_EXCL);
ceph_oloc_copy(&wr_req->r_base_oloc, &rd_req->r_base_oloc);
ceph_oid_copy(&wr_req->r_base_oid, &rd_req->r_base_oid);
@@ -1905,6 +1950,15 @@ int ceph_pool_perm_check(struct ceph_inode_info *ci, int need)
struct ceph_string *pool_ns;
int ret, flags;
+ if (ci->i_vino.snap != CEPH_NOSNAP) {
+ /*
+ * Pool permission check needs to write to the first object.
+ * But for snapshot, head of the first object may have alread
+ * been deleted. Skip check to avoid creating orphan object.
+ */
+ return 0;
+ }
+
if (ceph_test_mount_opt(ceph_inode_to_client(&ci->vfs_inode),
NOPOOLPERM))
return 0;
generated by cgit v1.2.3 (git 2.46.0) at 2025-09-07 18:55:31 +0000