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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client 

Pull Ceph changes from Alex Elder:
 "This is a big pull.

  Most of it is culmination of Alex's work to implement RBD image
  layering, which is now complete (yay!).

  There is also some work from Yan to fix i_mutex behavior surrounding
  writes in cephfs, a sync write fix, a fix for RBD images that get
  resized while they are mapped, and a few patches from me that resolve
  annoying auth warnings and fix several bugs in the ceph auth code."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: (254 commits)
  rbd: fix image request leak on parent read
  libceph: use slab cache for osd client requests
  libceph: allocate ceph message data with a slab allocator
  libceph: allocate ceph messages with a slab allocator
  rbd: allocate image object names with a slab allocator
  rbd: allocate object requests with a slab allocator
  rbd: allocate name separate from obj_request
  rbd: allocate image requests with a slab allocator
  rbd: use binary search for snapshot lookup
  rbd: clear EXISTS flag if mapped snapshot disappears
  rbd: kill off the snapshot list
  rbd: define rbd_snap_size() and rbd_snap_features()
  rbd: use snap_id not index to look up snap info
  rbd: look up snapshot name in names buffer
  rbd: drop obj_request->version
  rbd: drop rbd_obj_method_sync() version parameter
  rbd: more version parameter removal
  rbd: get rid of some version parameters
  rbd: stop tracking header object version
  rbd: snap names are pointer to constant data
  ...
This commit is contained in:
Linus Torvalds 2013-05-06 13:11:19 -07:00
parent 2e378f3eeb b5b09be30c
commit 91f8575685
32 changed files with 4238 additions and 2322 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
Documentation/ABI/testing/sysfs-bus-rbd
View File

@ -66,27 +66,7 @@ current_snap
The current snapshot for which the device is mapped.
snap_*
A directory per each snapshot
parent
Information identifying the pool, image, and snapshot id for
the parent image in a layered rbd image (format 2 only).
Entries under /sys/bus/rbd/devices/<dev-id>/snap_<snap-name>
-------------------------------------------------------------
snap_id
The rados internal snapshot id assigned for this snapshot
snap_size
The size of the image when this snapshot was taken.
snap_features
A hexadecimal encoding of the feature bits for this snapshot.

2842
drivers/block/rbd.c
View File

File diff suppressed because it is too large Load Diff

220
fs/ceph/addr.c
View File

@ -236,15 +236,21 @@ static int ceph_readpage(struct file *filp, struct page *page)
static void finish_read(struct ceph_osd_request *req, struct ceph_msg *msg)
{
struct inode *inode = req->r_inode;
struct ceph_osd_data *osd_data;
int rc = req->r_result;
int bytes = le32_to_cpu(msg->hdr.data_len);
int num_pages;
int i;
dout("finish_read %p req %p rc %d bytes %d\n", inode, req, rc, bytes);
/* unlock all pages, zeroing any data we didn't read */
for (i = 0; i < req->r_num_pages; i++, bytes -= PAGE_CACHE_SIZE) {
struct page *page = req->r_pages[i];
osd_data = osd_req_op_extent_osd_data(req, 0);
BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_PAGES);
num_pages = calc_pages_for((u64)osd_data->alignment,
(u64)osd_data->length);
for (i = 0; i < num_pages; i++) {
struct page *page = osd_data->pages[i];
if (bytes < (int)PAGE_CACHE_SIZE) {
/* zero (remainder of) page */
@ -257,8 +263,9 @@ static void finish_read(struct ceph_osd_request *req, struct ceph_msg *msg)
SetPageUptodate(page);
unlock_page(page);
page_cache_release(page);
bytes -= PAGE_CACHE_SIZE;
}
kfree(req->r_pages);
kfree(osd_data->pages);
}
static void ceph_unlock_page_vector(struct page **pages, int num_pages)
@ -279,6 +286,7 @@ static int start_read(struct inode *inode, struct list_head *page_list, int max)
&ceph_inode_to_client(inode)->client->osdc;
struct ceph_inode_info *ci = ceph_inode(inode);
struct page *page = list_entry(page_list->prev, struct page, lru);
struct ceph_vino vino;
struct ceph_osd_request *req;
u64 off;
u64 len;
@ -303,18 +311,17 @@ static int start_read(struct inode *inode, struct list_head *page_list, int max)
len = nr_pages << PAGE_CACHE_SHIFT;
dout("start_read %p nr_pages %d is %lld~%lld\n", inode, nr_pages,
off, len);
req = ceph_osdc_new_request(osdc, &ci->i_layout, ceph_vino(inode),
off, &len,
CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
NULL, 0,
vino = ceph_vino(inode);
req = ceph_osdc_new_request(osdc, &ci->i_layout, vino, off, &len,
1, CEPH_OSD_OP_READ,
CEPH_OSD_FLAG_READ, NULL,
ci->i_truncate_seq, ci->i_truncate_size,
NULL, false, 0);
false);
if (IS_ERR(req))
return PTR_ERR(req);
/* build page vector */
nr_pages = len >> PAGE_CACHE_SHIFT;
nr_pages = calc_pages_for(0, len);
pages = kmalloc(sizeof(*pages) * nr_pages, GFP_NOFS);
ret = -ENOMEM;
if (!pages)
@ -336,11 +343,12 @@ static int start_read(struct inode *inode, struct list_head *page_list, int max)
}
pages[i] = page;
}
req->r_pages = pages;
req->r_num_pages = nr_pages;
osd_req_op_extent_osd_data_pages(req, 0, pages, len, 0, false, false);
req->r_callback = finish_read;
req->r_inode = inode;
ceph_osdc_build_request(req, off, NULL, vino.snap, NULL);
dout("start_read %p starting %p %lld~%lld\n", inode, req, off, len);
ret = ceph_osdc_start_request(osdc, req, false);
if (ret < 0)
@ -373,7 +381,8 @@ static int ceph_readpages(struct file *file, struct address_space *mapping,
max = (fsc->mount_options->rsize + PAGE_CACHE_SIZE - 1)
>> PAGE_SHIFT;
dout("readpages %p file %p nr_pages %d max %d\n", inode, file, nr_pages,
dout("readpages %p file %p nr_pages %d max %d\n", inode,
file, nr_pages,
max);
while (!list_empty(page_list)) {
rc = start_read(inode, page_list, max);
@ -548,17 +557,23 @@ static void writepages_finish(struct ceph_osd_request *req,
{
struct inode *inode = req->r_inode;
struct ceph_inode_info *ci = ceph_inode(inode);
struct ceph_osd_data *osd_data;
unsigned wrote;
struct page *page;
int num_pages;
int i;
struct ceph_snap_context *snapc = req->r_snapc;
struct address_space *mapping = inode->i_mapping;
int rc = req->r_result;
u64 bytes = le64_to_cpu(req->r_request_ops[0].extent.length);
u64 bytes = req->r_ops[0].extent.length;
struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
long writeback_stat;
unsigned issued = ceph_caps_issued(ci);
osd_data = osd_req_op_extent_osd_data(req, 0);
BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_PAGES);
num_pages = calc_pages_for((u64)osd_data->alignment,
(u64)osd_data->length);
if (rc >= 0) {
/*
* Assume we wrote the pages we originally sent. The
@ -566,7 +581,7 @@ static void writepages_finish(struct ceph_osd_request *req,
* raced with a truncation and was adjusted at the osd,
* so don't believe the reply.
*/
wrote = req->r_num_pages;
wrote = num_pages;
} else {
wrote = 0;
mapping_set_error(mapping, rc);
@ -575,8 +590,8 @@ static void writepages_finish(struct ceph_osd_request *req,
inode, rc, bytes, wrote);
/* clean all pages */
for (i = 0; i < req->r_num_pages; i++) {
page = req->r_pages[i];
for (i = 0; i < num_pages; i++) {
page = osd_data->pages[i];
BUG_ON(!page);
WARN_ON(!PageUptodate(page));
@ -605,32 +620,34 @@ static void writepages_finish(struct ceph_osd_request *req,
unlock_page(page);
}
dout("%p wrote+cleaned %d pages\n", inode, wrote);
ceph_put_wrbuffer_cap_refs(ci, req->r_num_pages, snapc);
ceph_put_wrbuffer_cap_refs(ci, num_pages, snapc);
ceph_release_pages(req->r_pages, req->r_num_pages);
if (req->r_pages_from_pool)
mempool_free(req->r_pages,
ceph_release_pages(osd_data->pages, num_pages);
if (osd_data->pages_from_pool)
mempool_free(osd_data->pages,
ceph_sb_to_client(inode->i_sb)->wb_pagevec_pool);
else
kfree(req->r_pages);
kfree(osd_data->pages);
ceph_osdc_put_request(req);
}
/*
* allocate a page vec, either directly, or if necessary, via a the
* mempool. we avoid the mempool if we can because req->r_num_pages
* may be less than the maximum write size.
*/
static void alloc_page_vec(struct ceph_fs_client *fsc,
struct ceph_osd_request *req)
static struct ceph_osd_request *
ceph_writepages_osd_request(struct inode *inode, u64 offset, u64 *len,
struct ceph_snap_context *snapc, int num_ops)
{
req->r_pages = kmalloc(sizeof(struct page *) * req->r_num_pages,
GFP_NOFS);
if (!req->r_pages) {
req->r_pages = mempool_alloc(fsc->wb_pagevec_pool, GFP_NOFS);
req->r_pages_from_pool = 1;
WARN_ON(!req->r_pages);
}
struct ceph_fs_client *fsc;
struct ceph_inode_info *ci;
struct ceph_vino vino;
fsc = ceph_inode_to_client(inode);
ci = ceph_inode(inode);
vino = ceph_vino(inode);
/* BUG_ON(vino.snap != CEPH_NOSNAP); */
return ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout,
vino, offset, len, num_ops, CEPH_OSD_OP_WRITE,
CEPH_OSD_FLAG_WRITE|CEPH_OSD_FLAG_ONDISK,
snapc, ci->i_truncate_seq, ci->i_truncate_size, true);
}
/*
@ -653,7 +670,7 @@ static int ceph_writepages_start(struct address_space *mapping,
unsigned wsize = 1 << inode->i_blkbits;
struct ceph_osd_request *req = NULL;
int do_sync;
u64 snap_size = 0;
u64 snap_size;
/*
* Include a 'sync' in the OSD request if this is a data
@ -699,6 +716,7 @@ static int ceph_writepages_start(struct address_space *mapping,
retry:
/* find oldest snap context with dirty data */
ceph_put_snap_context(snapc);
snap_size = 0;
snapc = get_oldest_context(inode, &snap_size);
if (!snapc) {
/* hmm, why does writepages get called when there
@ -706,6 +724,8 @@ retry:
dout(" no snap context with dirty data?\n");
goto out;
}
if (snap_size == 0)
snap_size = i_size_read(inode);
dout(" oldest snapc is %p seq %lld (%d snaps)\n",
snapc, snapc->seq, snapc->num_snaps);
if (last_snapc && snapc != last_snapc) {
@ -718,10 +738,14 @@ retry:
last_snapc = snapc;
while (!done && index <= end) {
int num_ops = do_sync ? 2 : 1;
struct ceph_vino vino;
unsigned i;
int first;
pgoff_t next;
int pvec_pages, locked_pages;
struct page **pages = NULL;
mempool_t *pool = NULL; /* Becomes non-null if mempool used */
struct page *page;
int want;
u64 offset, len;
@ -773,11 +797,8 @@ get_more_pages:
dout("waiting on writeback %p\n", page);
wait_on_page_writeback(page);
}
if ((snap_size && page_offset(page) > snap_size) ||
(!snap_size &&
page_offset(page) > i_size_read(inode))) {
dout("%p page eof %llu\n", page, snap_size ?
snap_size : i_size_read(inode));
if (page_offset(page) >= snap_size) {
dout("%p page eof %llu\n", page, snap_size);
done = 1;
unlock_page(page);
break;
@ -805,22 +826,23 @@ get_more_pages:
break;
}
/* ok */
/*
* We have something to write. If this is
* the first locked page this time through,
* allocate an osd request and a page array
* that it will use.
*/
if (locked_pages == 0) {
size_t size;
BUG_ON(pages);
/* prepare async write request */
offset = (u64)page_offset(page);
len = wsize;
req = ceph_osdc_new_request(&fsc->client->osdc,
&ci->i_layout,
ceph_vino(inode),
offset, &len,
CEPH_OSD_OP_WRITE,
CEPH_OSD_FLAG_WRITE |
CEPH_OSD_FLAG_ONDISK,
snapc, do_sync,
ci->i_truncate_seq,
ci->i_truncate_size,
&inode->i_mtime, true, 0);
req = ceph_writepages_osd_request(inode,
offset, &len, snapc,
num_ops);
if (IS_ERR(req)) {
rc = PTR_ERR(req);
@ -828,11 +850,17 @@ get_more_pages:
break;
}
max_pages = req->r_num_pages;
alloc_page_vec(fsc, req);
req->r_callback = writepages_finish;
req->r_inode = inode;
max_pages = calc_pages_for(0, (u64)len);
size = max_pages * sizeof (*pages);
pages = kmalloc(size, GFP_NOFS);
if (!pages) {
pool = fsc->wb_pagevec_pool;
pages = mempool_alloc(pool, GFP_NOFS);
BUG_ON(!pages);
}
}
/* note position of first page in pvec */
@ -850,7 +878,7 @@ get_more_pages:
}
set_page_writeback(page);
req->r_pages[locked_pages] = page;
pages[locked_pages] = page;
locked_pages++;
next = page->index + 1;
}
@ -879,18 +907,27 @@ get_more_pages:
pvec.nr -= i-first;
}
/* submit the write */
offset = req->r_pages[0]->index << PAGE_CACHE_SHIFT;
len = min((snap_size ? snap_size : i_size_read(inode)) - offset,
/* Format the osd request message and submit the write */
offset = page_offset(pages[0]);
len = min(snap_size - offset,
(u64)locked_pages << PAGE_CACHE_SHIFT);
dout("writepages got %d pages at %llu~%llu\n",
locked_pages, offset, len);
/* revise final length, page count */
req->r_num_pages = locked_pages;
req->r_request_ops[0].extent.length = cpu_to_le64(len);
req->r_request_ops[0].payload_len = cpu_to_le32(len);
req->r_request->hdr.data_len = cpu_to_le32(len);
osd_req_op_extent_osd_data_pages(req, 0, pages, len, 0,
!!pool, false);
pages = NULL; /* request message now owns the pages array */
pool = NULL;
/* Update the write op length in case we changed it */
osd_req_op_extent_update(req, 0, len);
vino = ceph_vino(inode);
ceph_osdc_build_request(req, offset, snapc, vino.snap,
&inode->i_mtime);
rc = ceph_osdc_start_request(&fsc->client->osdc, req, true);
BUG_ON(rc);
@ -1067,51 +1104,23 @@ static int ceph_write_begin(struct file *file, struct address_space *mapping,
struct page **pagep, void **fsdata)
{
struct inode *inode = file_inode(file);
struct ceph_inode_info *ci = ceph_inode(inode);
struct ceph_file_info *fi = file->private_data;
struct page *page;
pgoff_t index = pos >> PAGE_CACHE_SHIFT;
int r, want, got = 0;
if (fi->fmode & CEPH_FILE_MODE_LAZY)
want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO;
else
want = CEPH_CAP_FILE_BUFFER;
dout("write_begin %p %llx.%llx %llu~%u getting caps. i_size %llu\n",
inode, ceph_vinop(inode), pos, len, inode->i_size);
r = ceph_get_caps(ci, CEPH_CAP_FILE_WR, want, &got, pos+len);
if (r < 0)
return r;
dout("write_begin %p %llx.%llx %llu~%u got cap refs on %s\n",
inode, ceph_vinop(inode), pos, len, ceph_cap_string(got));
if (!(got & (CEPH_CAP_FILE_BUFFER|CEPH_CAP_FILE_LAZYIO))) {
ceph_put_cap_refs(ci, got);
return -EAGAIN;
}
int r;
do {
/* get a page */
page = grab_cache_page_write_begin(mapping, index, 0);
if (!page) {
r = -ENOMEM;
break;
}
if (!page)
return -ENOMEM;
*pagep = page;
dout("write_begin file %p inode %p page %p %d~%d\n", file,
inode, page, (int)pos, (int)len);
r = ceph_update_writeable_page(file, pos, len, page);
if (r)
page_cache_release(page);
} while (r == -EAGAIN);
if (r) {
ceph_put_cap_refs(ci, got);
} else {
*pagep = page;
*(int *)fsdata = got;
}
return r;
}
@ -1125,12 +1134,10 @@ static int ceph_write_end(struct file *file, struct address_space *mapping,
struct page *page, void *fsdata)
{
struct inode *inode = file_inode(file);
struct ceph_inode_info *ci = ceph_inode(inode);
struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
struct ceph_mds_client *mdsc = fsc->mdsc;
unsigned from = pos & (PAGE_CACHE_SIZE - 1);
int check_cap = 0;
int got = (unsigned long)fsdata;
dout("write_end file %p inode %p page %p %d~%d (%d)\n", file,
inode, page, (int)pos, (int)copied, (int)len);
@ -1153,19 +1160,6 @@ static int ceph_write_end(struct file *file, struct address_space *mapping,
up_read(&mdsc->snap_rwsem);
page_cache_release(page);
if (copied > 0) {
int dirty;
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);
}
dout("write_end %p %llx.%llx %llu~%u dropping cap refs on %s\n",
inode, ceph_vinop(inode), pos, len, ceph_cap_string(got));
ceph_put_cap_refs(ci, got);
if (check_cap)
ceph_check_caps(ceph_inode(inode), CHECK_CAPS_AUTHONLY, NULL);

27
fs/ceph/caps.c
View File

@ -490,15 +490,17 @@ static void __check_cap_issue(struct ceph_inode_info *ci, struct ceph_cap *cap,
ci->i_rdcache_gen++;
/*
* if we are newly issued FILE_SHARED, clear D_COMPLETE; we
* if we are newly issued FILE_SHARED, mark dir not complete; we
* don't know what happened to this directory while we didn't
* have the cap.
*/
if ((issued & CEPH_CAP_FILE_SHARED) &&
(had & CEPH_CAP_FILE_SHARED) == 0) {
ci->i_shared_gen++;
if (S_ISDIR(ci->vfs_inode.i_mode))
ceph_dir_clear_complete(&ci->vfs_inode);
if (S_ISDIR(ci->vfs_inode.i_mode)) {
dout(" marking %p NOT complete\n", &ci->vfs_inode);
__ceph_dir_clear_complete(ci);
}
}
}
@ -553,6 +555,7 @@ retry:
cap->implemented = 0;
cap->mds = mds;
cap->mds_wanted = 0;
cap->mseq = 0;
cap->ci = ci;
__insert_cap_node(ci, cap);
@ -628,6 +631,9 @@ retry:
cap->cap_id = cap_id;
cap->issued = issued;
cap->implemented |= issued;
if (mseq > cap->mseq)
cap->mds_wanted = wanted;
else
cap->mds_wanted |= wanted;
cap->seq = seq;
cap->issue_seq = seq;
@ -997,7 +1003,7 @@ static int send_cap_msg(struct ceph_mds_session *session,
return 0;
}
static void __queue_cap_release(struct ceph_mds_session *session,
void __queue_cap_release(struct ceph_mds_session *session,
u64 ino, u64 cap_id, u32 migrate_seq,
u32 issue_seq)
{
@ -2046,6 +2052,13 @@ static int try_get_cap_refs(struct ceph_inode_info *ci, int need, int want,
goto out;
}
/* finish pending truncate */
while (ci->i_truncate_pending) {
spin_unlock(&ci->i_ceph_lock);
__ceph_do_pending_vmtruncate(inode, !(need & CEPH_CAP_FILE_WR));
spin_lock(&ci->i_ceph_lock);
}
if (need & CEPH_CAP_FILE_WR) {
if (endoff >= 0 && endoff > (loff_t)ci->i_max_size) {
dout("get_cap_refs %p endoff %llu > maxsize %llu\n",
@ -2067,12 +2080,6 @@ static int try_get_cap_refs(struct ceph_inode_info *ci, int need, int want,
}
have = __ceph_caps_issued(ci, &implemented);
/*
* disallow writes while a truncate is pending
*/
if (ci->i_truncate_pending)
have &= ~CEPH_CAP_FILE_WR;
if ((have & need) == need) {
/*
* Look at (implemented & ~have & not) so that we keep waiting

65
fs/ceph/dir.c
View File

@ -107,7 +107,7 @@ static unsigned fpos_off(loff_t p)
* falling back to a "normal" sync readdir if any dentries in the dir
* are dropped.
*
* D_COMPLETE tells indicates we have all dentries in the dir. It is
* Complete dir indicates that we have all dentries in the dir. It is
* defined IFF we hold CEPH_CAP_FILE_SHARED (which will be revoked by
* the MDS if/when the directory is modified).
*/
@ -198,8 +198,8 @@ more:
filp->f_pos++;
/* make sure a dentry wasn't dropped while we didn't have parent lock */
if (!ceph_dir_test_complete(dir)) {
dout(" lost D_COMPLETE on %p; falling back to mds\n", dir);
if (!ceph_dir_is_complete(dir)) {
dout(" lost dir complete on %p; falling back to mds\n", dir);
err = -EAGAIN;
goto out;
}
@ -258,7 +258,7 @@ static int ceph_readdir(struct file *filp, void *dirent, filldir_t filldir)
if (filp->f_pos == 0) {
/* note dir version at start of readdir so we can tell
* if any dentries get dropped */
fi->dir_release_count = ci->i_release_count;
fi->dir_release_count = atomic_read(&ci->i_release_count);
dout("readdir off 0 -> '.'\n");
if (filldir(dirent, ".", 1, ceph_make_fpos(0, 0),
@ -284,7 +284,7 @@ static int ceph_readdir(struct file *filp, void *dirent, filldir_t filldir)
if ((filp->f_pos == 2 || fi->dentry) &&
!ceph_test_mount_opt(fsc, NOASYNCREADDIR) &&
ceph_snap(inode) != CEPH_SNAPDIR &&
ceph_dir_test_complete(inode) &&
__ceph_dir_is_complete(ci) &&
__ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1)) {
spin_unlock(&ci->i_ceph_lock);
err = __dcache_readdir(filp, dirent, filldir);
@ -350,7 +350,8 @@ more:
if (!req->r_did_prepopulate) {
dout("readdir !did_prepopulate");
fi->dir_release_count--; /* preclude D_COMPLETE */
/* preclude from marking dir complete */
fi->dir_release_count--;
}
/* note next offset and last dentry name */
@ -428,8 +429,9 @@ more:
* the complete dir contents in our cache.
*/
spin_lock(&ci->i_ceph_lock);
if (ci->i_release_count == fi->dir_release_count) {
ceph_dir_set_complete(inode);
if (atomic_read(&ci->i_release_count) == fi->dir_release_count) {
dout(" marking %p complete\n", inode);
__ceph_dir_set_complete(ci, fi->dir_release_count);
ci->i_max_offset = filp->f_pos;
}
spin_unlock(&ci->i_ceph_lock);
@ -604,7 +606,7 @@ static struct dentry *ceph_lookup(struct inode *dir, struct dentry *dentry,
fsc->mount_options->snapdir_name,
dentry->d_name.len) &&
!is_root_ceph_dentry(dir, dentry) &&
ceph_dir_test_complete(dir) &&
__ceph_dir_is_complete(ci) &&
(__ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1))) {
spin_unlock(&ci->i_ceph_lock);
dout(" dir %p complete, -ENOENT\n", dir);
@ -1064,44 +1066,6 @@ static int ceph_snapdir_d_revalidate(struct dentry *dentry,
return 1;
}
/*
* Set/clear/test dir complete flag on the dir's dentry.
*/
void ceph_dir_set_complete(struct inode *inode)
{
struct dentry *dentry = d_find_any_alias(inode);
if (dentry && ceph_dentry(dentry) &&
ceph_test_mount_opt(ceph_sb_to_client(dentry->d_sb), DCACHE)) {
dout(" marking %p (%p) complete\n", inode, dentry);
set_bit(CEPH_D_COMPLETE, &ceph_dentry(dentry)->flags);
}
dput(dentry);
}
void ceph_dir_clear_complete(struct inode *inode)
{
struct dentry *dentry = d_find_any_alias(inode);
if (dentry && ceph_dentry(dentry)) {
dout(" marking %p (%p) complete\n", inode, dentry);
set_bit(CEPH_D_COMPLETE, &ceph_dentry(dentry)->flags);
}
dput(dentry);
}
bool ceph_dir_test_complete(struct inode *inode)
{
struct dentry *dentry = d_find_any_alias(inode);
if (dentry && ceph_dentry(dentry)) {
dout(" marking %p (%p) NOT complete\n", inode, dentry);
clear_bit(CEPH_D_COMPLETE, &ceph_dentry(dentry)->flags);
}
dput(dentry);
return false;
}
/*
* When the VFS prunes a dentry from the cache, we need to clear the
* complete flag on the parent directory.
@ -1110,15 +1074,13 @@ bool ceph_dir_test_complete(struct inode *inode)
*/
static void ceph_d_prune(struct dentry *dentry)
{
struct ceph_dentry_info *di;
dout("ceph_d_prune %p\n", dentry);
/* do we have a valid parent? */
if (IS_ROOT(dentry))
return;
/* if we are not hashed, we don't affect D_COMPLETE */
/* if we are not hashed, we don't affect dir's completeness */
if (d_unhashed(dentry))
return;
@ -1126,8 +1088,7 @@ static void ceph_d_prune(struct dentry *dentry)
* we hold d_lock, so d_parent is stable, and d_fsdata is never
* cleared until d_release
*/
di = ceph_dentry(dentry->d_parent);
clear_bit(CEPH_D_COMPLETE, &di->flags);
ceph_dir_clear_complete(dentry->d_parent->d_inode);
}
/*

241
fs/ceph/file.c
View File

@ -446,20 +446,36 @@ done:
}
/*
* Write commit callback, called if we requested both an ACK and
* ONDISK commit reply from the OSD.
* Write commit request unsafe callback, called to tell us when a
* request is unsafe (that is, in flight--has been handed to the
* messenger to send to its target osd). It is called again when
* we've received a response message indicating the request is
* "safe" (its CEPH_OSD_FLAG_ONDISK flag is set), or when a request
* is completed early (and unsuccessfully) due to a timeout or
* interrupt.
*
* This is used if we requested both an ACK and ONDISK commit reply
* from the OSD.
*/
static void sync_write_commit(struct ceph_osd_request *req,
struct ceph_msg *msg)
static void ceph_sync_write_unsafe(struct ceph_osd_request *req, bool unsafe)
{
struct ceph_inode_info *ci = ceph_inode(req->r_inode);
dout("sync_write_commit %p tid %llu\n", req, req->r_tid);
dout("%s %p tid %llu %ssafe\n", __func__, req, req->r_tid,
unsafe ? "un" : "");
if (unsafe) {
ceph_get_cap_refs(ci, CEPH_CAP_FILE_WR);
spin_lock(&ci->i_unsafe_lock);
list_add_tail(&req->r_unsafe_item,
&ci->i_unsafe_writes);
spin_unlock(&ci->i_unsafe_lock);
} else {
spin_lock(&ci->i_unsafe_lock);
list_del_init(&req->r_unsafe_item);
spin_unlock(&ci->i_unsafe_lock);
ceph_put_cap_refs(ci, CEPH_CAP_FILE_WR);
}
}
/*
* Synchronous write, straight from __user pointer or user pages (if
@ -470,36 +486,33 @@ static void sync_write_commit(struct ceph_osd_request *req,
* objects, rollback on failure, etc.)
*/
static ssize_t ceph_sync_write(struct file *file, const char __user *data,
size_t left, loff_t *offset)
size_t left, loff_t pos, loff_t *ppos)
{
struct inode *inode = file_inode(file);
struct ceph_inode_info *ci = ceph_inode(inode);
struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
struct ceph_snap_context *snapc;
struct ceph_vino vino;
struct ceph_osd_request *req;
int num_ops = 1;
struct page **pages;
int num_pages;
long long unsigned pos;
u64 len;
int written = 0;
int flags;
int do_sync = 0;
int check_caps = 0;
int page_align, io_align;
unsigned long buf_align;
int ret;
struct timespec mtime = CURRENT_TIME;
bool own_pages = false;
if (ceph_snap(file_inode(file)) != CEPH_NOSNAP)
return -EROFS;
dout("sync_write on file %p %lld~%u %s\n", file, *offset,
dout("sync_write on file %p %lld~%u %s\n", file, pos,
(unsigned)left, (file->f_flags & O_DIRECT) ? "O_DIRECT" : "");
if (file->f_flags & O_APPEND)
pos = i_size_read(inode);
else
pos = *offset;
ret = filemap_write_and_wait_range(inode->i_mapping, pos, pos + left);
if (ret < 0)
return ret;
@ -516,7 +529,7 @@ static ssize_t ceph_sync_write(struct file *file, const char __user *data,
if ((file->f_flags & (O_SYNC|O_DIRECT)) == 0)
flags |= CEPH_OSD_FLAG_ACK;
else
do_sync = 1;
num_ops++; /* Also include a 'startsync' command. */
/*
* we may need to do multiple writes here if we span an object
@ -526,25 +539,20 @@ more:
io_align = pos & ~PAGE_MASK;
buf_align = (unsigned long)data & ~PAGE_MASK;
len = left;
if (file->f_flags & O_DIRECT) {
/* write from beginning of first page, regardless of
io alignment */
page_align = (pos - io_align + buf_align) & ~PAGE_MASK;
num_pages = calc_pages_for((unsigned long)data, len);
} else {
page_align = pos & ~PAGE_MASK;
num_pages = calc_pages_for(pos, len);
}
snapc = ci->i_snap_realm->cached_context;
vino = ceph_vino(inode);
req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout,
ceph_vino(inode), pos, &len,
CEPH_OSD_OP_WRITE, flags,
ci->i_snap_realm->cached_context,
do_sync,
vino, pos, &len, num_ops,
CEPH_OSD_OP_WRITE, flags, snapc,
ci->i_truncate_seq, ci->i_truncate_size,
&mtime, false, page_align);
false);
if (IS_ERR(req))
return PTR_ERR(req);
/* write from beginning of first page, regardless of io alignment */
page_align = file->f_flags & O_DIRECT ? buf_align : io_align;
num_pages = calc_pages_for(page_align, len);
if (file->f_flags & O_DIRECT) {
pages = ceph_get_direct_page_vector(data, num_pages, false);
if (IS_ERR(pages)) {
@ -572,36 +580,20 @@ more:
if ((file->f_flags & O_SYNC) == 0) {
/* get a second commit callback */
req->r_safe_callback = sync_write_commit;
req->r_own_pages = 1;
}
}
req->r_pages = pages;
req->r_num_pages = num_pages;
req->r_unsafe_callback = ceph_sync_write_unsafe;
req->r_inode = inode;
own_pages = true;
}
}
osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
false, own_pages);
/* BUG_ON(vino.snap != CEPH_NOSNAP); */
ceph_osdc_build_request(req, pos, snapc, vino.snap, &mtime);
ret = ceph_osdc_start_request(&fsc->client->osdc, req, false);
if (!ret) {
if (req->r_safe_callback) {
/*
* Add to inode unsafe list only after we
* start_request so that a tid has been assigned.
*/
spin_lock(&ci->i_unsafe_lock);
list_add_tail(&req->r_unsafe_item,
&ci->i_unsafe_writes);
spin_unlock(&ci->i_unsafe_lock);
ceph_get_cap_refs(ci, CEPH_CAP_FILE_WR);
}
if (!ret)
ret = ceph_osdc_wait_request(&fsc->client->osdc, req);
if (ret < 0 && req->r_safe_callback) {
spin_lock(&ci->i_unsafe_lock);
list_del_init(&req->r_unsafe_item);
spin_unlock(&ci->i_unsafe_lock);
ceph_put_cap_refs(ci, CEPH_CAP_FILE_WR);
}
}
if (file->f_flags & O_DIRECT)
ceph_put_page_vector(pages, num_pages, false);
@ -614,12 +606,12 @@ out:
pos += len;
written += len;
left -= len;
data += written;
data += len;
if (left)
goto more;
ret = written;
*offset = pos;
*ppos = pos;
if (pos > i_size_read(inode))
check_caps = ceph_inode_set_size(inode, pos);
if (check_caps)
@ -653,7 +645,6 @@ static ssize_t ceph_aio_read(struct kiocb *iocb, const struct iovec *iov,
dout("aio_read %p %llx.%llx %llu~%u trying to get caps on %p\n",
inode, ceph_vinop(inode), pos, (unsigned)len, inode);
again:
__ceph_do_pending_vmtruncate(inode);
if (fi->fmode & CEPH_FILE_MODE_LAZY)
want = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO;
else
@ -717,55 +708,75 @@ static ssize_t ceph_aio_write(struct kiocb *iocb, const struct iovec *iov,
struct ceph_inode_info *ci = ceph_inode(inode);
struct ceph_osd_client *osdc =
&ceph_sb_to_client(inode->i_sb)->client->osdc;
loff_t endoff = pos + iov->iov_len;
int got = 0;
int ret, err, written;
ssize_t count, written = 0;
int err, want, got;
bool hold_mutex;
if (ceph_snap(inode) != CEPH_NOSNAP)
return -EROFS;
sb_start_write(inode->i_sb);
mutex_lock(&inode->i_mutex);
hold_mutex = true;
err = generic_segment_checks(iov, &nr_segs, &count, VERIFY_READ);
if (err)
goto out;
/* We can write back this queue in page reclaim */
current->backing_dev_info = file->f_mapping->backing_dev_info;
err = generic_write_checks(file, &pos, &count, S_ISBLK(inode->i_mode));
if (err)
goto out;
if (count == 0)
goto out;
err = file_remove_suid(file);
if (err)
goto out;
err = file_update_time(file);
if (err)
goto out;
retry_snap:
written = 0;
if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL))
return -ENOSPC;
__ceph_do_pending_vmtruncate(inode);
if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL)) {
err = -ENOSPC;
goto out;
}
/*
* try to do a buffered write. if we don't have sufficient
* caps, we'll get -EAGAIN from generic_file_aio_write, or a
* short write if we only get caps for some pages.
*/
if (!(iocb->ki_filp->f_flags & O_DIRECT) &&
!(inode->i_sb->s_flags & MS_SYNCHRONOUS) &&
!(fi->flags & CEPH_F_SYNC)) {
ret = generic_file_aio_write(iocb, iov, nr_segs, pos);
if (ret >= 0)
written = ret;
if ((ret >= 0 || ret == -EIOCBQUEUED) &&
((file->f_flags & O_SYNC) || IS_SYNC(file->f_mapping->host)
|| ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_NEARFULL))) {
err = vfs_fsync_range(file, pos, pos + written - 1, 1);
dout("aio_write %p %llx.%llx %llu~%zd getting caps. i_size %llu\n",
inode, ceph_vinop(inode), pos, count, inode->i_size);
if (fi->fmode & CEPH_FILE_MODE_LAZY)
want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO;
else
want = CEPH_CAP_FILE_BUFFER;
got = 0;
err = ceph_get_caps(ci, CEPH_CAP_FILE_WR, want, &got, pos + count);
if (err < 0)
ret = err;
}
if ((ret < 0 && ret != -EAGAIN) || pos + written >= endoff)
goto out;
}
dout("aio_write %p %llx.%llx %llu~%u getting caps. i_size %llu\n",
inode, ceph_vinop(inode), pos + written,
(unsigned)iov->iov_len - written, inode->i_size);
ret = ceph_get_caps(ci, CEPH_CAP_FILE_WR, 0, &got, endoff);
if (ret < 0)
goto out;
dout("aio_write %p %llx.%llx %llu~%u got cap refs on %s\n",
inode, ceph_vinop(inode), pos + written,
(unsigned)iov->iov_len - written, ceph_cap_string(got));
ret = ceph_sync_write(file, iov->iov_base + written,
iov->iov_len - written, &iocb->ki_pos);
if (ret >= 0) {
dout("aio_write %p %llx.%llx %llu~%zd got cap refs on %s\n",
inode, ceph_vinop(inode), pos, count, ceph_cap_string(got));
if ((got & (CEPH_CAP_FILE_BUFFER|CEPH_CAP_FILE_LAZYIO)) == 0 ||
(iocb->ki_filp->f_flags & O_DIRECT) ||
(inode->i_sb->s_flags & MS_SYNCHRONOUS) ||
(fi->flags & CEPH_F_SYNC)) {
mutex_unlock(&inode->i_mutex);
written = ceph_sync_write(file, iov->iov_base, count,
pos, &iocb->ki_pos);
} else {
written = generic_file_buffered_write(iocb, iov, nr_segs,
pos, &iocb->ki_pos,
count, 0);
mutex_unlock(&inode->i_mutex);
}
hold_mutex = false;
if (written >= 0) {
int dirty;
spin_lock(&ci->i_ceph_lock);
dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR);
@ -773,18 +784,34 @@ retry_snap:
if (dirty)
__mark_inode_dirty(inode, dirty);
}
dout("aio_write %p %llx.%llx %llu~%u dropping cap refs on %s\n",
inode, ceph_vinop(inode), pos + written,
(unsigned)iov->iov_len - written, ceph_cap_string(got));
inode, ceph_vinop(inode), pos, (unsigned)iov->iov_len,
ceph_cap_string(got));
ceph_put_cap_refs(ci, got);
out:
if (ret == -EOLDSNAPC) {
dout("aio_write %p %llx.%llx %llu~%u got EOLDSNAPC, retrying\n",
inode, ceph_vinop(inode), pos, (unsigned)iov->iov_len);
goto retry_snap;
if (written >= 0 &&
((file->f_flags & O_SYNC) || IS_SYNC(file->f_mapping->host) ||
ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_NEARFULL))) {
err = vfs_fsync_range(file, pos, pos + written - 1, 1);
if (err < 0)
written = err;
}
return ret;
if (written == -EOLDSNAPC) {
dout("aio_write %p %llx.%llx %llu~%u got EOLDSNAPC, retrying\n",
inode, ceph_vinop(inode), pos, (unsigned)iov->iov_len);
mutex_lock(&inode->i_mutex);
hold_mutex = true;
goto retry_snap;
}
out:
if (hold_mutex)
mutex_unlock(&inode->i_mutex);
sb_end_write(inode->i_sb);
current->backing_dev_info = NULL;
return written ? written : err;
}
/*
@ -796,7 +823,7 @@ static loff_t ceph_llseek(struct file *file, loff_t offset, int whence)
int ret;
mutex_lock(&inode->i_mutex);
__ceph_do_pending_vmtruncate(inode);
__ceph_do_pending_vmtruncate(inode, false);
if (whence == SEEK_END || whence == SEEK_DATA || whence == SEEK_HOLE) {
ret = ceph_do_getattr(inode, CEPH_STAT_CAP_SIZE);

59
fs/ceph/inode.c
View File

@ -302,7 +302,8 @@ struct inode *ceph_alloc_inode(struct super_block *sb)
ci->i_version = 0;
ci->i_time_warp_seq = 0;
ci->i_ceph_flags = 0;
ci->i_release_count = 0;
atomic_set(&ci->i_release_count, 1);
atomic_set(&ci->i_complete_count, 0);
ci->i_symlink = NULL;
memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout));
@ -561,7 +562,6 @@ static int fill_inode(struct inode *inode,
struct ceph_inode_info *ci = ceph_inode(inode);
int i;
int issued = 0, implemented;
int updating_inode = 0;
struct timespec mtime, atime, ctime;
u32 nsplits;
struct ceph_buffer *xattr_blob = NULL;
@ -601,7 +601,6 @@ static int fill_inode(struct inode *inode,
(ci->i_version & ~1) >= le64_to_cpu(info->version))
goto no_change;
updating_inode = 1;
issued = __ceph_caps_issued(ci, &implemented);
issued |= implemented | __ceph_caps_dirty(ci);
@ -717,6 +716,17 @@ static int fill_inode(struct inode *inode,
ceph_vinop(inode), inode->i_mode);
}
/* set dir completion flag? */
if (S_ISDIR(inode->i_mode) &&
ci->i_files == 0 && ci->i_subdirs == 0 &&
ceph_snap(inode) == CEPH_NOSNAP &&
(le32_to_cpu(info->cap.caps) & CEPH_CAP_FILE_SHARED) &&
(issued & CEPH_CAP_FILE_EXCL) == 0 &&
!__ceph_dir_is_complete(ci)) {
dout(" marking %p complete (empty)\n", inode);
__ceph_dir_set_complete(ci, atomic_read(&ci->i_release_count));
ci->i_max_offset = 2;
}
no_change:
spin_unlock(&ci->i_ceph_lock);
@ -767,19 +777,6 @@ no_change:
__ceph_get_fmode(ci, cap_fmode);
}
/* set dir completion flag? */
if (S_ISDIR(inode->i_mode) &&
updating_inode && /* didn't jump to no_change */
ci->i_files == 0 && ci->i_subdirs == 0 &&
ceph_snap(inode) == CEPH_NOSNAP &&
(le32_to_cpu(info->cap.caps) & CEPH_CAP_FILE_SHARED) &&
(issued & CEPH_CAP_FILE_EXCL) == 0 &&
!ceph_dir_test_complete(inode)) {
dout(" marking %p complete (empty)\n", inode);
ceph_dir_set_complete(inode);
ci->i_max_offset = 2;
}
/* update delegation info? */
if (dirinfo)
ceph_fill_dirfrag(inode, dirinfo);
@ -861,7 +858,7 @@ static void ceph_set_dentry_offset(struct dentry *dn)
di = ceph_dentry(dn);
spin_lock(&ci->i_ceph_lock);
if (!ceph_dir_test_complete(inode)) {
if (!__ceph_dir_is_complete(ci)) {
spin_unlock(&ci->i_ceph_lock);
return;
}
@ -1065,8 +1062,8 @@ int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req,
/*
* d_move() puts the renamed dentry at the end of
* d_subdirs. We need to assign it an appropriate
* directory offset so we can behave when holding
* D_COMPLETE.
* directory offset so we can behave when dir is
* complete.
*/
ceph_set_dentry_offset(req->r_old_dentry);
dout("dn %p gets new offset %lld\n", req->r_old_dentry,
@ -1457,7 +1454,7 @@ out:
/*
* called by trunc_wq; take i_mutex ourselves
* called by trunc_wq;
*
* We also truncate in a separate thread as well.
*/
@ -1468,9 +1465,7 @@ static void ceph_vmtruncate_work(struct work_struct *work)
struct inode *inode = &ci->vfs_inode;
dout("vmtruncate_work %p\n", inode);
mutex_lock(&inode->i_mutex);
__ceph_do_pending_vmtruncate(inode);
mutex_unlock(&inode->i_mutex);
__ceph_do_pending_vmtruncate(inode, true);
iput(inode);
}
@ -1494,12 +1489,10 @@ void ceph_queue_vmtruncate(struct inode *inode)
}
/*
* called with i_mutex held.
*
* Make sure any pending truncation is applied before doing anything
* that may depend on it.
*/
void __ceph_do_pending_vmtruncate(struct inode *inode)
void __ceph_do_pending_vmtruncate(struct inode *inode, bool needlock)
{
struct ceph_inode_info *ci = ceph_inode(inode);
u64 to;
@ -1532,7 +1525,11 @@ retry:
ci->i_truncate_pending, to);
spin_unlock(&ci->i_ceph_lock);
if (needlock)
mutex_lock(&inode->i_mutex);
truncate_inode_pages(inode->i_mapping, to);
if (needlock)
mutex_unlock(&inode->i_mutex);
spin_lock(&ci->i_ceph_lock);
if (to == ci->i_truncate_size) {
@ -1563,6 +1560,12 @@ static void *ceph_sym_follow_link(struct dentry *dentry, struct nameidata *nd)
static const struct inode_operations ceph_symlink_iops = {
.readlink = generic_readlink,
.follow_link = ceph_sym_follow_link,
.setattr = ceph_setattr,
.getattr = ceph_getattr,
.setxattr = ceph_setxattr,
.getxattr = ceph_getxattr,
.listxattr = ceph_listxattr,
.removexattr = ceph_removexattr,
};
/*
@ -1585,7 +1588,7 @@ int ceph_setattr(struct dentry *dentry, struct iattr *attr)
if (ceph_snap(inode) != CEPH_NOSNAP)
return -EROFS;
__ceph_do_pending_vmtruncate(inode);
__ceph_do_pending_vmtruncate(inode, false);
err = inode_change_ok(inode, attr);
if (err != 0)
@ -1767,7 +1770,7 @@ int ceph_setattr(struct dentry *dentry, struct iattr *attr)
ceph_cap_string(dirtied), mask);
ceph_mdsc_put_request(req);
__ceph_do_pending_vmtruncate(inode);
__ceph_do_pending_vmtruncate(inode, false);
return err;
out:
spin_unlock(&ci->i_ceph_lock);

5
fs/ceph/ioctl.c
View File

@ -208,8 +208,9 @@ static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg)
snprintf(dl.object_name, sizeof(dl.object_name), "%llx.%08llx",
ceph_ino(inode), dl.object_no);
ceph_calc_object_layout(&pgid, dl.object_name, &ci->i_layout,
osdc->osdmap);
ceph_calc_ceph_pg(&pgid, dl.object_name, osdc->osdmap,
ceph_file_layout_pg_pool(ci->i_layout));
dl.osd = ceph_calc_pg_primary(osdc->osdmap, pgid);
if (dl.osd >= 0) {

71
fs/ceph/mds_client.c
View File

@ -265,7 +265,8 @@ static int parse_reply_info_extra(void **p, void *end,
{
if (info->head->op == CEPH_MDS_OP_GETFILELOCK)
return parse_reply_info_filelock(p, end, info, features);
else if (info->head->op == CEPH_MDS_OP_READDIR)
else if (info->head->op == CEPH_MDS_OP_READDIR ||
info->head->op == CEPH_MDS_OP_LSSNAP)
return parse_reply_info_dir(p, end, info, features);
else if (info->head->op == CEPH_MDS_OP_CREATE)
return parse_reply_info_create(p, end, info, features);
@ -364,7 +365,7 @@ void ceph_put_mds_session(struct ceph_mds_session *s)
atomic_read(&s->s_ref), atomic_read(&s->s_ref)-1);
if (atomic_dec_and_test(&s->s_ref)) {
if (s->s_auth.authorizer)
s->s_mdsc->fsc->client->monc.auth->ops->destroy_authorizer(
ceph_auth_destroy_authorizer(
s->s_mdsc->fsc->client->monc.auth,
s->s_auth.authorizer);
kfree(s);
@ -1196,6 +1197,8 @@ static int trim_caps_cb(struct inode *inode, struct ceph_cap *cap, void *arg)
session->s_trim_caps--;
if (oissued) {
/* we aren't the only cap.. just remove us */
__queue_cap_release(session, ceph_ino(inode), cap->cap_id,
cap->mseq, cap->issue_seq);
__ceph_remove_cap(cap);
} else {
/* try to drop referring dentries */
@ -1718,8 +1721,12 @@ static struct ceph_msg *create_request_message(struct ceph_mds_client *mdsc,
msg->front.iov_len = p - msg->front.iov_base;
msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
msg->pages = req->r_pages;
msg->nr_pages = req->r_num_pages;
if (req->r_data_len) {
/* outbound data set only by ceph_sync_setxattr() */
BUG_ON(!req->r_pages);
ceph_msg_data_add_pages(msg, req->r_pages, req->r_data_len, 0);
}
msg->hdr.data_len = cpu_to_le32(req->r_data_len);
msg->hdr.data_off = cpu_to_le16(0);
@ -1913,6 +1920,7 @@ static void __wake_requests(struct ceph_mds_client *mdsc,
req = list_entry(tmp_list.next,
struct ceph_mds_request, r_wait);
list_del_init(&req->r_wait);
dout(" wake request %p tid %llu\n", req, req->r_tid);
__do_request(mdsc, req);
}
}
@ -2026,20 +2034,16 @@ out:
}
/*
* Invalidate dir D_COMPLETE, dentry lease state on an aborted MDS
* Invalidate dir's completeness, dentry lease state on an aborted MDS
* namespace request.
*/
void ceph_invalidate_dir_request(struct ceph_mds_request *req)
{
struct inode *inode = req->r_locked_dir;
struct ceph_inode_info *ci = ceph_inode(inode);
dout("invalidate_dir_request %p (D_COMPLETE, lease(s))\n", inode);
spin_lock(&ci->i_ceph_lock);
dout("invalidate_dir_request %p (complete, lease(s))\n", inode);
ceph_dir_clear_complete(inode);
ci->i_release_count++;
spin_unlock(&ci->i_ceph_lock);
if (req->r_dentry)
ceph_invalidate_dentry_lease(req->r_dentry);
if (req->r_old_dentry)
@ -2599,11 +2603,13 @@ static void send_mds_reconnect(struct ceph_mds_client *mdsc,
goto fail;
}
reply->pagelist = pagelist;
if (recon_state.flock)
reply->hdr.version = cpu_to_le16(2);
if (pagelist->length) {
/* set up outbound data if we have any */
reply->hdr.data_len = cpu_to_le32(pagelist->length);
reply->nr_pages = calc_pages_for(0, pagelist->length);
ceph_msg_data_add_pagelist(reply, pagelist);
}
ceph_con_send(&session->s_con, reply);
mutex_unlock(&session->s_mutex);
@ -3433,12 +3439,16 @@ static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
struct ceph_auth_handshake *auth = &s->s_auth;
if (force_new && auth->authorizer) {
if (ac->ops && ac->ops->destroy_authorizer)
ac->ops->destroy_authorizer(ac, auth->authorizer);
ceph_auth_destroy_authorizer(ac, auth->authorizer);
auth->authorizer = NULL;
}
if (!auth->authorizer && ac->ops && ac->ops->create_authorizer) {
int ret = ac->ops->create_authorizer(ac, CEPH_ENTITY_TYPE_MDS,
if (!auth->authorizer) {
int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_MDS,
auth);
if (ret)
return ERR_PTR(ret);
} else {
int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_MDS,
auth);
if (ret)
return ERR_PTR(ret);
@ -3455,7 +3465,7 @@ static int verify_authorizer_reply(struct ceph_connection *con, int len)
struct ceph_mds_client *mdsc = s->s_mdsc;
struct ceph_auth_client *ac = mdsc->fsc->client->monc.auth;
return ac->ops->verify_authorizer_reply(ac, s->s_auth.authorizer, len);
return ceph_auth_verify_authorizer_reply(ac, s->s_auth.authorizer, len);
}
static int invalidate_authorizer(struct ceph_connection *con)
@ -3464,12 +3474,32 @@ static int invalidate_authorizer(struct ceph_connection *con)
struct ceph_mds_client *mdsc = s->s_mdsc;
struct ceph_auth_client *ac = mdsc->fsc->client->monc.auth;
if (ac->ops->invalidate_authorizer)
ac->ops->invalidate_authorizer(ac, CEPH_ENTITY_TYPE_MDS);
ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_MDS);
return ceph_monc_validate_auth(&mdsc->fsc->client->monc);
}
static struct ceph_msg *mds_alloc_msg(struct ceph_connection *con,
struct ceph_msg_header *hdr, int *skip)
{
struct ceph_msg *msg;
int type = (int) le16_to_cpu(hdr->type);
int front_len = (int) le32_to_cpu(hdr->front_len);
if (con->in_msg)
return con->in_msg;
*skip = 0;
msg = ceph_msg_new(type, front_len, GFP_NOFS, false);
if (!msg) {
pr_err("unable to allocate msg type %d len %d\n",
type, front_len);
return NULL;
}
return msg;
}
static const struct ceph_connection_operations mds_con_ops = {
.get = con_get,
.put = con_put,
@ -3478,6 +3508,7 @@ static const struct ceph_connection_operations mds_con_ops = {
.verify_authorizer_reply = verify_authorizer_reply,
.invalidate_authorizer = invalidate_authorizer,
.peer_reset = peer_reset,
.alloc_msg = mds_alloc_msg,
};
/* eof */

8
fs/ceph/mdsmap.c
View File

@ -20,7 +20,10 @@ int ceph_mdsmap_get_random_mds(struct ceph_mdsmap *m)
{
int n = 0;
int i;
char r;
/* special case for one mds */
if (1 == m->m_max_mds && m->m_info[0].state > 0)
return 0;
/* count */
for (i = 0; i < m->m_max_mds; i++)
@ -30,8 +33,7 @@ int ceph_mdsmap_get_random_mds(struct ceph_mdsmap *m)
return -1;
/* pick */
get_random_bytes(&r, 1);
n = r % n;
n = prandom_u32() % n;
i = 0;
for (i = 0; n > 0; i++, n--)
while (m->m_info[i].state <= 0)

3
fs/ceph/snap.c
View File

@ -332,10 +332,9 @@ static int build_snap_context(struct ceph_snap_realm *realm)
err = -ENOMEM;
if (num > (SIZE_MAX - sizeof(*snapc)) / sizeof(u64))
goto fail;
snapc = kzalloc(sizeof(*snapc) + num*sizeof(u64), GFP_NOFS);
snapc = ceph_create_snap_context(num, GFP_NOFS);
if (!snapc)
goto fail;
atomic_set(&snapc->nref, 1);
/* build (reverse sorted) snap vector */
num = 0;

7
fs/ceph/super.c
View File

@ -479,6 +479,8 @@ static struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt,
CEPH_FEATURE_FLOCK |
CEPH_FEATURE_DIRLAYOUTHASH;
const unsigned required_features = 0;
int page_count;
size_t size;
int err = -ENOMEM;
fsc = kzalloc(sizeof(*fsc), GFP_KERNEL);
@ -522,8 +524,9 @@ static struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt,
/* set up mempools */
err = -ENOMEM;
fsc->wb_pagevec_pool = mempool_create_kmalloc_pool(10,
fsc->mount_options->wsize >> PAGE_CACHE_SHIFT);
page_count = fsc->mount_options->wsize >> PAGE_CACHE_SHIFT;
size = sizeof (struct page *) * (page_count ? page_count : 1);
fsc->wb_pagevec_pool = mempool_create_kmalloc_pool(10, size);
if (!fsc->wb_pagevec_pool)
goto fail_trunc_wq;

67
fs/ceph/super.h
View File

@ -204,7 +204,6 @@ struct ceph_inode_xattr {
* Ceph dentry state
*/
struct ceph_dentry_info {
unsigned long flags;
struct ceph_mds_session *lease_session;
u32 lease_gen, lease_shared_gen;
u32 lease_seq;
@ -215,18 +214,6 @@ struct ceph_dentry_info {
u64 offset;
};
/*
* dentry flags
*
* The locking for D_COMPLETE is a bit odd:
* - we can clear it at almost any time (see ceph_d_prune)
* - it is only meaningful if:
* - we hold dir inode i_ceph_lock
* - we hold dir FILE_SHARED caps
* - the dentry D_COMPLETE is set
*/
#define CEPH_D_COMPLETE 1 /* if set, d_u.d_subdirs is complete directory */
struct ceph_inode_xattrs_info {
/*
* (still encoded) xattr blob. we avoid the overhead of parsing
@ -257,7 +244,8 @@ struct ceph_inode_info {
u32 i_time_warp_seq;
unsigned i_ceph_flags;
unsigned long i_release_count;
atomic_t i_release_count;
atomic_t i_complete_count;
struct ceph_dir_layout i_dir_layout;
struct ceph_file_layout i_layout;
@ -267,7 +255,7 @@ struct ceph_inode_info {
struct timespec i_rctime;
u64 i_rbytes, i_rfiles, i_rsubdirs;
u64 i_files, i_subdirs;
u64 i_max_offset; /* largest readdir offset, set with D_COMPLETE */
u64 i_max_offset; /* largest readdir offset, set with complete dir */
struct rb_root i_fragtree;
struct mutex i_fragtree_mutex;
@ -436,33 +424,31 @@ static inline struct inode *ceph_find_inode(struct super_block *sb,
#define CEPH_I_FLUSH 8 /* do not delay flush of dirty metadata */
#define CEPH_I_NOFLUSH 16 /* do not flush dirty caps */
static inline void ceph_i_clear(struct inode *inode, unsigned mask)
static inline void __ceph_dir_set_complete(struct ceph_inode_info *ci,
int release_count)
{
struct ceph_inode_info *ci = ceph_inode(inode);
spin_lock(&ci->i_ceph_lock);
ci->i_ceph_flags &= ~mask;
spin_unlock(&ci->i_ceph_lock);
atomic_set(&ci->i_complete_count, release_count);
}
static inline void ceph_i_set(struct inode *inode, unsigned mask)
static inline void __ceph_dir_clear_complete(struct ceph_inode_info *ci)
{
struct ceph_inode_info *ci = ceph_inode(inode);
spin_lock(&ci->i_ceph_lock);
ci->i_ceph_flags |= mask;
spin_unlock(&ci->i_ceph_lock);
atomic_inc(&ci->i_release_count);
}
static inline bool ceph_i_test(struct inode *inode, unsigned mask)
static inline bool __ceph_dir_is_complete(struct ceph_inode_info *ci)
{
struct ceph_inode_info *ci = ceph_inode(inode);
bool r;
return atomic_read(&ci->i_complete_count) ==
atomic_read(&ci->i_release_count);
}
spin_lock(&ci->i_ceph_lock);
r = (ci->i_ceph_flags & mask) == mask;
spin_unlock(&ci->i_ceph_lock);
return r;
static inline void ceph_dir_clear_complete(struct inode *inode)
{
__ceph_dir_clear_complete(ceph_inode(inode));
}
static inline bool ceph_dir_is_complete(struct inode *inode)
{
return __ceph_dir_is_complete(ceph_inode(inode));
}
@ -488,13 +474,6 @@ static inline loff_t ceph_make_fpos(unsigned frag, unsigned off)
return ((loff_t)frag << 32) | (loff_t)off;
}
/*
* set/clear directory D_COMPLETE flag
*/
void ceph_dir_set_complete(struct inode *inode);
void ceph_dir_clear_complete(struct inode *inode);
bool ceph_dir_test_complete(struct inode *inode);
/*
* caps helpers
*/
@ -584,7 +563,7 @@ struct ceph_file_info {
u64 next_offset; /* offset of next chunk (last_name's + 1) */
char *last_name; /* last entry in previous chunk */
struct dentry *dentry; /* next dentry (for dcache readdir) */
unsigned long dir_release_count;
int dir_release_count;
/* used for -o dirstat read() on directory thing */
char *dir_info;
@ -713,7 +692,7 @@ extern int ceph_readdir_prepopulate(struct ceph_mds_request *req,
extern int ceph_inode_holds_cap(struct inode *inode, int mask);
extern int ceph_inode_set_size(struct inode *inode, loff_t size);
extern void __ceph_do_pending_vmtruncate(struct inode *inode);
extern void __ceph_do_pending_vmtruncate(struct inode *inode, bool needlock);
extern void ceph_queue_vmtruncate(struct inode *inode);
extern void ceph_queue_invalidate(struct inode *inode);
@ -755,6 +734,8 @@ static inline void ceph_remove_cap(struct ceph_cap *cap)
extern void ceph_put_cap(struct ceph_mds_client *mdsc,
struct ceph_cap *cap);
extern void __queue_cap_release(struct ceph_mds_session *session, u64 ino,
u64 cap_id, u32 migrate_seq, u32 issue_seq);
extern void ceph_queue_caps_release(struct inode *inode);
extern int ceph_write_inode(struct inode *inode, struct writeback_control *wbc);
extern int ceph_fsync(struct file *file, loff_t start, loff_t end,

18
include/linux/ceph/auth.h
View File

@ -52,6 +52,9 @@ struct ceph_auth_client_ops {
*/
int (*create_authorizer)(struct ceph_auth_client *ac, int peer_type,
struct ceph_auth_handshake *auth);
/* ensure that an existing authorizer is up to date */
int (*update_authorizer)(struct ceph_auth_client *ac, int peer_type,
struct ceph_auth_handshake *auth);
int (*verify_authorizer_reply)(struct ceph_auth_client *ac,
struct ceph_authorizer *a, size_t len);
void (*destroy_authorizer)(struct ceph_auth_client *ac,
@ -75,6 +78,8 @@ struct ceph_auth_client {
u64 global_id; /* our unique id in system */
const struct ceph_crypto_key *key; /* our secret key */
unsigned want_keys; /* which services we want */
struct mutex mutex;
};
extern struct ceph_auth_client *ceph_auth_init(const char *name,
@ -94,5 +99,18 @@ extern int ceph_build_auth(struct ceph_auth_client *ac,
void *msg_buf, size_t msg_len);
extern int ceph_auth_is_authenticated(struct ceph_auth_client *ac);
extern int ceph_auth_create_authorizer(struct ceph_auth_client *ac,
int peer_type,
struct ceph_auth_handshake *auth);
extern void ceph_auth_destroy_authorizer(struct ceph_auth_client *ac,
struct ceph_authorizer *a);
extern int ceph_auth_update_authorizer(struct ceph_auth_client *ac,
int peer_type,
struct ceph_auth_handshake *a);
extern int ceph_auth_verify_authorizer_reply(struct ceph_auth_client *ac,
struct ceph_authorizer *a,
size_t len);
extern void ceph_auth_invalidate_authorizer(struct ceph_auth_client *ac,
int peer_type);
#endif

2
include/linux/ceph/ceph_features.h
View File

@ -41,6 +41,7 @@
*/
#define CEPH_FEATURES_SUPPORTED_DEFAULT \
(CEPH_FEATURE_NOSRCADDR | \
CEPH_FEATURE_RECONNECT_SEQ | \
CEPH_FEATURE_PGID64 | \
CEPH_FEATURE_PGPOOL3 | \
CEPH_FEATURE_OSDENC | \
@ -51,6 +52,7 @@
#define CEPH_FEATURES_REQUIRED_DEFAULT \
(CEPH_FEATURE_NOSRCADDR | \
CEPH_FEATURE_RECONNECT_SEQ | \
CEPH_FEATURE_PGID64 | \
CEPH_FEATURE_PGPOOL3 | \
CEPH_FEATURE_OSDENC)

30
include/linux/ceph/decode.h
View File

@ -8,6 +8,23 @@
#include <linux/ceph/types.h>
/* This seemed to be the easiest place to define these */
#define U8_MAX ((u8)(~0U))
#define U16_MAX ((u16)(~0U))
#define U32_MAX ((u32)(~0U))
#define U64_MAX ((u64)(~0ULL))
#define S8_MAX ((s8)(U8_MAX >> 1))
#define S16_MAX ((s16)(U16_MAX >> 1))
#define S32_MAX ((s32)(U32_MAX >> 1))
#define S64_MAX ((s64)(U64_MAX >> 1LL))
#define S8_MIN ((s8)(-S8_MAX - 1))
#define S16_MIN ((s16)(-S16_MAX - 1))
#define S32_MIN ((s32)(-S32_MAX - 1))
#define S64_MIN ((s64)(-S64_MAX - 1LL))
/*
* in all cases,
* void **p pointer to position pointer
@ -137,14 +154,19 @@ bad:
static inline void ceph_decode_timespec(struct timespec *ts,
const struct ceph_timespec *tv)
{
ts->tv_sec = le32_to_cpu(tv->tv_sec);
ts->tv_nsec = le32_to_cpu(tv->tv_nsec);
ts->tv_sec = (__kernel_time_t)le32_to_cpu(tv->tv_sec);
ts->tv_nsec = (long)le32_to_cpu(tv->tv_nsec);
}
static inline void ceph_encode_timespec(struct ceph_timespec *tv,
const struct timespec *ts)
{
tv->tv_sec = cpu_to_le32(ts->tv_sec);
tv->tv_nsec = cpu_to_le32(ts->tv_nsec);
BUG_ON(ts->tv_sec < 0);
BUG_ON(ts->tv_sec > (__kernel_time_t)U32_MAX);
BUG_ON(ts->tv_nsec < 0);
BUG_ON(ts->tv_nsec > (long)U32_MAX);
tv->tv_sec = cpu_to_le32((u32)ts->tv_sec);
tv->tv_nsec = cpu_to_le32((u32)ts->tv_nsec);
}
/*

31
include/linux/ceph/libceph.h
View File

@ -66,6 +66,7 @@ struct ceph_options {
#define CEPH_OSD_IDLE_TTL_DEFAULT 60
#define CEPH_MSG_MAX_FRONT_LEN (16*1024*1024)
#define CEPH_MSG_MAX_MIDDLE_LEN (16*1024*1024)
#define CEPH_MSG_MAX_DATA_LEN (16*1024*1024)
#define CEPH_AUTH_NAME_DEFAULT "guest"
@ -156,31 +157,11 @@ struct ceph_snap_context {
u64 snaps[];
};
static inline struct ceph_snap_context *
ceph_get_snap_context(struct ceph_snap_context *sc)
{
/*
printk("get_snap_context %p %d -> %d\n", sc, atomic_read(&sc->nref),
atomic_read(&sc->nref)+1);
*/
if (sc)
atomic_inc(&sc->nref);
return sc;
}
static inline void ceph_put_snap_context(struct ceph_snap_context *sc)
{
if (!sc)
return;
/*
printk("put_snap_context %p %d -> %d\n", sc, atomic_read(&sc->nref),
atomic_read(&sc->nref)-1);
*/
if (atomic_dec_and_test(&sc->nref)) {
/*printk(" deleting snap_context %p\n", sc);*/
kfree(sc);
}
}
extern struct ceph_snap_context *ceph_create_snap_context(u32 snap_count,
gfp_t gfp_flags);
extern struct ceph_snap_context *ceph_get_snap_context(
struct ceph_snap_context *sc);
extern void ceph_put_snap_context(struct ceph_snap_context *sc);
/*
* calculate the number of pages a given length and offset map onto,

104
include/linux/ceph/messenger.h
View File

@ -64,6 +64,77 @@ struct ceph_messenger {
u32 required_features;
};
enum ceph_msg_data_type {
CEPH_MSG_DATA_NONE, /* message contains no data payload */
CEPH_MSG_DATA_PAGES, /* data source/destination is a page array */
CEPH_MSG_DATA_PAGELIST, /* data source/destination is a pagelist */
#ifdef CONFIG_BLOCK
CEPH_MSG_DATA_BIO, /* data source/destination is a bio list */
#endif /* CONFIG_BLOCK */
};
static __inline__ bool ceph_msg_data_type_valid(enum ceph_msg_data_type type)
{
switch (type) {
case CEPH_MSG_DATA_NONE:
case CEPH_MSG_DATA_PAGES:
case CEPH_MSG_DATA_PAGELIST:
#ifdef CONFIG_BLOCK
case CEPH_MSG_DATA_BIO:
#endif /* CONFIG_BLOCK */
return true;
default:
return false;
}
}
struct ceph_msg_data {
struct list_head links; /* ceph_msg->data */
enum ceph_msg_data_type type;
union {
#ifdef CONFIG_BLOCK
struct {
struct bio *bio;
size_t bio_length;
};
#endif /* CONFIG_BLOCK */
struct {
struct page **pages; /* NOT OWNER. */
size_t length; /* total # bytes */
unsigned int alignment; /* first page */
};
struct ceph_pagelist *pagelist;
};
};
struct ceph_msg_data_cursor {
size_t total_resid; /* across all data items */
struct list_head *data_head; /* = &ceph_msg->data */
struct ceph_msg_data *data; /* current data item */
size_t resid; /* bytes not yet consumed */
bool last_piece; /* current is last piece */
bool need_crc; /* crc update needed */
union {
#ifdef CONFIG_BLOCK
struct { /* bio */
struct bio *bio; /* bio from list */
unsigned int vector_index; /* vector from bio */
unsigned int vector_offset; /* bytes from vector */
};
#endif /* CONFIG_BLOCK */
struct { /* pages */
unsigned int page_offset; /* offset in page */
unsigned short page_index; /* index in array */
unsigned short page_count; /* pages in array */
};
struct { /* pagelist */
struct page *page; /* page from list */
size_t offset; /* bytes from list */
};
};
};
/*
* a single message. it contains a header (src, dest, message type, etc.),
* footer (crc values, mainly), a "front" message body, and possibly a
@ -74,21 +145,15 @@ struct ceph_msg {
struct ceph_msg_footer footer; /* footer */
struct kvec front; /* unaligned blobs of message */
struct ceph_buffer *middle;
struct page **pages; /* data payload. NOT OWNER. */
unsigned nr_pages; /* size of page array */
unsigned page_alignment; /* io offset in first page */
struct ceph_pagelist *pagelist; /* instead of pages */
size_t data_length;
struct list_head data;
struct ceph_msg_data_cursor cursor;
struct ceph_connection *con;
struct list_head list_head;
struct list_head list_head; /* links for connection lists */
struct kref kref;
#ifdef CONFIG_BLOCK
struct bio *bio; /* instead of pages/pagelist */
struct bio *bio_iter; /* bio iterator */
int bio_seg; /* current bio segment */
#endif /* CONFIG_BLOCK */
struct ceph_pagelist *trail; /* the trailing part of the data */
bool front_is_vmalloc;
bool more_to_follow;
bool needs_out_seq;
@ -98,12 +163,6 @@ struct ceph_msg {
struct ceph_msgpool *pool;
};
struct ceph_msg_pos {
int page, page_pos; /* which page; offset in page */
int data_pos; /* offset in data payload */
bool did_page_crc; /* true if we've calculated crc for current page */
};
/* ceph connection fault delay defaults, for exponential backoff */
#define BASE_DELAY_INTERVAL (HZ/2)
#define MAX_DELAY_INTERVAL (5 * 60 * HZ)
@ -161,7 +220,6 @@ struct ceph_connection {
struct ceph_msg *out_msg; /* sending message (== tail of
out_sent) */
bool out_msg_done;
struct ceph_msg_pos out_msg_pos;
struct kvec out_kvec[8], /* sending header/footer data */
*out_kvec_cur;
@ -175,7 +233,6 @@ struct ceph_connection {
/* message in temps */
struct ceph_msg_header in_hdr;
struct ceph_msg *in_msg;
struct ceph_msg_pos in_msg_pos;
u32 in_front_crc, in_middle_crc, in_data_crc; /* calculated crc */
char in_tag; /* protocol control byte */
@ -218,6 +275,15 @@ extern void ceph_msg_revoke_incoming(struct ceph_msg *msg);
extern void ceph_con_keepalive(struct ceph_connection *con);
extern void ceph_msg_data_add_pages(struct ceph_msg *msg, struct page **pages,
size_t length, size_t alignment);
extern void ceph_msg_data_add_pagelist(struct ceph_msg *msg,
struct ceph_pagelist *pagelist);
#ifdef CONFIG_BLOCK
extern void ceph_msg_data_add_bio(struct ceph_msg *msg, struct bio *bio,
size_t length);
#endif /* CONFIG_BLOCK */
extern struct ceph_msg *ceph_msg_new(int type, int front_len, gfp_t flags,
bool can_fail);
extern void ceph_msg_kfree(struct ceph_msg *m);

1
include/linux/ceph/msgr.h
View File

@ -87,6 +87,7 @@ struct ceph_entity_inst {
#define CEPH_MSGR_TAG_BADPROTOVER 10 /* bad protocol version */
#define CEPH_MSGR_TAG_BADAUTHORIZER 11 /* bad authorizer */
#define CEPH_MSGR_TAG_FEATURES 12 /* insufficient features */
#define CEPH_MSGR_TAG_SEQ 13 /* 64-bit int follows with seen seq number */
/*

204
include/linux/ceph/osd_client.h
View File

@ -29,6 +29,7 @@ struct ceph_authorizer;
*/
typedef void (*ceph_osdc_callback_t)(struct ceph_osd_request *,
struct ceph_msg *);
typedef void (*ceph_osdc_unsafe_callback_t)(struct ceph_osd_request *, bool);
/* a given osd we're communicating with */
struct ceph_osd {
@ -48,7 +49,67 @@ struct ceph_osd {
};
#define CEPH_OSD_MAX_OP 10
#define CEPH_OSD_MAX_OP 2
enum ceph_osd_data_type {
CEPH_OSD_DATA_TYPE_NONE = 0,
CEPH_OSD_DATA_TYPE_PAGES,
CEPH_OSD_DATA_TYPE_PAGELIST,
#ifdef CONFIG_BLOCK
CEPH_OSD_DATA_TYPE_BIO,
#endif /* CONFIG_BLOCK */
};
struct ceph_osd_data {
enum ceph_osd_data_type type;
union {
struct {
struct page **pages;
u64 length;
u32 alignment;
bool pages_from_pool;
bool own_pages;
};
struct ceph_pagelist *pagelist;
#ifdef CONFIG_BLOCK
struct {
struct bio *bio; /* list of bios */
size_t bio_length; /* total in list */
};
#endif /* CONFIG_BLOCK */
};
};
struct ceph_osd_req_op {
u16 op; /* CEPH_OSD_OP_* */
u32 payload_len;
union {
struct ceph_osd_data raw_data_in;
struct {
u64 offset, length;
u64 truncate_size;
u32 truncate_seq;
struct ceph_osd_data osd_data;
} extent;
struct {
const char *class_name;
const char *method_name;
struct ceph_osd_data request_info;
struct ceph_osd_data request_data;
struct ceph_osd_data response_data;
__u8 class_len;
__u8 method_len;
__u8 argc;
} cls;
struct {
u64 cookie;
u64 ver;
u32 prot_ver;
u32 timeout;
__u8 flag;
} watch;
};
};
/* an in-flight request */
struct ceph_osd_request {
@ -63,15 +124,14 @@ struct ceph_osd_request {
int r_pg_osds[CEPH_PG_MAX_SIZE];
int r_num_pg_osds;
struct ceph_connection *r_con_filling_msg;
struct ceph_msg *r_request, *r_reply;
int r_flags; /* any additional flags for the osd */
u32 r_sent; /* >0 if r_request is sending/sent */
int r_num_ops;
/* encoded message content */
struct ceph_osd_op *r_request_ops;
/* request osd ops array */
unsigned int r_num_ops;
struct ceph_osd_req_op r_ops[CEPH_OSD_MAX_OP];
/* these are updated on each send */
__le32 *r_request_osdmap_epoch;
__le32 *r_request_flags;
@ -85,12 +145,14 @@ struct ceph_osd_request {
s32 r_reply_op_result[CEPH_OSD_MAX_OP];
int r_got_reply;
int r_linger;
int r_completed;
struct ceph_osd_client *r_osdc;
struct kref r_kref;
bool r_mempool;
struct completion r_completion, r_safe_completion;
ceph_osdc_callback_t r_callback, r_safe_callback;
ceph_osdc_callback_t r_callback;
ceph_osdc_unsafe_callback_t r_unsafe_callback;
struct ceph_eversion r_reassert_version;
struct list_head r_unsafe_item;
@ -104,16 +166,6 @@ struct ceph_osd_request {
struct ceph_file_layout r_file_layout;
struct ceph_snap_context *r_snapc; /* snap context for writes */
unsigned r_num_pages; /* size of page array (follows) */
unsigned r_page_alignment; /* io offset in first page */
struct page **r_pages; /* pages for data payload */
int r_pages_from_pool;
int r_own_pages; /* if true, i own page list */
#ifdef CONFIG_BLOCK
struct bio *r_bio; /* instead of pages */
#endif
struct ceph_pagelist r_trail; /* trailing part of the data */
};
struct ceph_osd_event {
@ -172,48 +224,8 @@ struct ceph_osd_client {
struct workqueue_struct *notify_wq;
};
struct ceph_osd_req_op {
u16 op; /* CEPH_OSD_OP_* */
u32 payload_len;
union {
struct {
u64 offset, length;
u64 truncate_size;
u32 truncate_seq;
} extent;
struct {
const char *name;
const char *val;
u32 name_len;
u32 value_len;
__u8 cmp_op; /* CEPH_OSD_CMPXATTR_OP_* */
__u8 cmp_mode; /* CEPH_OSD_CMPXATTR_MODE_* */
} xattr;
struct {
const char *class_name;
const char *method_name;
const char *indata;
u32 indata_len;
__u8 class_len;
__u8 method_len;
__u8 argc;
} cls;
struct {
u64 cookie;
u64 count;
} pgls;
struct {
u64 snapid;
} snap;
struct {
u64 cookie;
u64 ver;
u32 prot_ver;
u32 timeout;
__u8 flag;
} watch;
};
};
extern int ceph_osdc_setup(void);
extern void ceph_osdc_cleanup(void);
extern int ceph_osdc_init(struct ceph_osd_client *osdc,
struct ceph_client *client);
@ -224,16 +236,71 @@ extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc,
extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc,
struct ceph_msg *msg);
extern void osd_req_op_init(struct ceph_osd_request *osd_req,
unsigned int which, u16 opcode);
extern void osd_req_op_raw_data_in_pages(struct ceph_osd_request *,
unsigned int which,
struct page **pages, u64 length,
u32 alignment, bool pages_from_pool,
bool own_pages);
extern void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
unsigned int which, u16 opcode,
u64 offset, u64 length,
u64 truncate_size, u32 truncate_seq);
extern void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
unsigned int which, u64 length);
extern struct ceph_osd_data *osd_req_op_extent_osd_data(
struct ceph_osd_request *osd_req,
unsigned int which);
extern struct ceph_osd_data *osd_req_op_cls_response_data(
struct ceph_osd_request *osd_req,
unsigned int which);
extern void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *,
unsigned int which,
struct page **pages, u64 length,
u32 alignment, bool pages_from_pool,
bool own_pages);
extern void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *,
unsigned int which,
struct ceph_pagelist *pagelist);
#ifdef CONFIG_BLOCK
extern void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *,
unsigned int which,
struct bio *bio, size_t bio_length);
#endif /* CONFIG_BLOCK */
extern void osd_req_op_cls_request_data_pagelist(struct ceph_osd_request *,
unsigned int which,
struct ceph_pagelist *pagelist);
extern void osd_req_op_cls_request_data_pages(struct ceph_osd_request *,
unsigned int which,
struct page **pages, u64 length,
u32 alignment, bool pages_from_pool,
bool own_pages);
extern void osd_req_op_cls_response_data_pages(struct ceph_osd_request *,
unsigned int which,
struct page **pages, u64 length,
u32 alignment, bool pages_from_pool,
bool own_pages);
extern void osd_req_op_cls_init(struct ceph_osd_request *osd_req,
unsigned int which, u16 opcode,
const char *class, const char *method);
extern void osd_req_op_watch_init(struct ceph_osd_request *osd_req,
unsigned int which, u16 opcode,
u64 cookie, u64 version, int flag);
extern struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
struct ceph_snap_context *snapc,
unsigned int num_op,
unsigned int num_ops,
bool use_mempool,
gfp_t gfp_flags);
extern void ceph_osdc_build_request(struct ceph_osd_request *req,
u64 off, u64 len,
unsigned int num_op,
struct ceph_osd_req_op *src_ops,
extern void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off,
struct ceph_snap_context *snapc,
u64 snap_id,
struct timespec *mtime);
@ -241,12 +308,11 @@ extern void ceph_osdc_build_request(struct ceph_osd_request *req,
extern struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *,
struct ceph_file_layout *layout,
struct ceph_vino vino,
u64 offset, u64 *len, int op, int flags,
u64 offset, u64 *len,
int num_ops, int opcode, int flags,
struct ceph_snap_context *snapc,
int do_sync, u32 truncate_seq,
u64 truncate_size,
struct timespec *mtime,
bool use_mempool, int page_align);
u32 truncate_seq, u64 truncate_size,
bool use_mempool);
extern void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
struct ceph_osd_request *req);

30
include/linux/ceph/osdmap.h
View File

@ -3,6 +3,7 @@
#include <linux/rbtree.h>
#include <linux/ceph/types.h>
#include <linux/ceph/decode.h>
#include <linux/ceph/ceph_fs.h>
#include <linux/crush/crush.h>
@ -119,6 +120,29 @@ static inline struct ceph_entity_addr *ceph_osd_addr(struct ceph_osdmap *map,
return &map->osd_addr[osd];
}
static inline int ceph_decode_pgid(void **p, void *end, struct ceph_pg *pgid)
{
__u8 version;
if (!ceph_has_room(p, end, 1 + 8 + 4 + 4)) {
pr_warning("incomplete pg encoding");
return -EINVAL;
}
version = ceph_decode_8(p);
if (version > 1) {
pr_warning("do not understand pg encoding %d > 1",
(int)version);
return -EINVAL;
}
pgid->pool = ceph_decode_64(p);
pgid->seed = ceph_decode_32(p);
*p += 4; /* skip deprecated preferred value */
return 0;
}
extern struct ceph_osdmap *osdmap_decode(void **p, void *end);
extern struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
struct ceph_osdmap *map,
@ -131,10 +155,8 @@ extern int ceph_calc_file_object_mapping(struct ceph_file_layout *layout,
u64 *bno, u64 *oxoff, u64 *oxlen);
/* calculate mapping of object to a placement group */
extern int ceph_calc_object_layout(struct ceph_pg *pg,
const char *oid,
struct ceph_file_layout *fl,
struct ceph_osdmap *osdmap);
extern int ceph_calc_ceph_pg(struct ceph_pg *pg, const char *oid,
struct ceph_osdmap *osdmap, uint64_t pool);
extern int ceph_calc_pg_acting(struct ceph_osdmap *osdmap,
struct ceph_pg pgid,
int *acting);

2
net/ceph/Makefile
View File

@ -11,5 +11,5 @@ libceph-y := ceph_common.o messenger.o msgpool.o buffer.o pagelist.o \
crypto.o armor.o \
auth_x.o \
ceph_fs.o ceph_strings.o ceph_hash.o \
pagevec.o
pagevec.o snapshot.o

117
net/ceph/auth.c
View File

@ -47,6 +47,7 @@ struct ceph_auth_client *ceph_auth_init(const char *name, const struct ceph_cryp
if (!ac)
goto out;
mutex_init(&ac->mutex);
ac->negotiating = true;
if (name)
ac->name = name;
@ -73,10 +74,12 @@ void ceph_auth_destroy(struct ceph_auth_client *ac)
*/
void ceph_auth_reset(struct ceph_auth_client *ac)
{
mutex_lock(&ac->mutex);
dout("auth_reset %p\n", ac);
if (ac->ops && !ac->negotiating)
ac->ops->reset(ac);
ac->negotiating = true;
mutex_unlock(&ac->mutex);
}
int ceph_entity_name_encode(const char *name, void **p, void *end)
@ -102,6 +105,7 @@ int ceph_auth_build_hello(struct ceph_auth_client *ac, void *buf, size_t len)
int i, num;
int ret;
mutex_lock(&ac->mutex);
dout("auth_build_hello\n");
monhdr->have_version = 0;
monhdr->session_mon = cpu_to_le16(-1);
@ -122,15 +126,19 @@ int ceph_auth_build_hello(struct ceph_auth_client *ac, void *buf, size_t len)
ret = ceph_entity_name_encode(ac->name, &p, end);
if (ret < 0)
return ret;
goto out;
ceph_decode_need(&p, end, sizeof(u64), bad);
ceph_encode_64(&p, ac->global_id);
ceph_encode_32(&lenp, p - lenp - sizeof(u32));
return p - buf;
ret = p - buf;
out:
mutex_unlock(&ac->mutex);
return ret;
bad:
return -ERANGE;
ret = -ERANGE;
goto out;
}
static int ceph_build_auth_request(struct ceph_auth_client *ac,
@ -151,11 +159,13 @@ static int ceph_build_auth_request(struct ceph_auth_client *ac,
if (ret < 0) {
pr_err("error %d building auth method %s request\n", ret,
ac->ops->name);
return ret;
goto out;
}
dout(" built request %d bytes\n", ret);
ceph_encode_32(&p, ret);
return p + ret - msg_buf;
ret = p + ret - msg_buf;
out:
return ret;
}
/*
@ -176,6 +186,7 @@ int ceph_handle_auth_reply(struct ceph_auth_client *ac,
int result_msg_len;
int ret = -EINVAL;
mutex_lock(&ac->mutex);
dout("handle_auth_reply %p %p\n", p, end);
ceph_decode_need(&p, end, sizeof(u32) * 3 + sizeof(u64), bad);
protocol = ceph_decode_32(&p);
@ -227,33 +238,103 @@ int ceph_handle_auth_reply(struct ceph_auth_client *ac,
ret = ac->ops->handle_reply(ac, result, payload, payload_end);
if (ret == -EAGAIN) {
return ceph_build_auth_request(ac, reply_buf, reply_len);
ret = ceph_build_auth_request(ac, reply_buf, reply_len);
} else if (ret) {
pr_err("auth method '%s' error %d\n", ac->ops->name, ret);
return ret;
}
return 0;
out:
mutex_unlock(&ac->mutex);
return ret;
bad:
pr_err("failed to decode auth msg\n");
out:
return ret;
ret = -EINVAL;
goto out;
}
int ceph_build_auth(struct ceph_auth_client *ac,
void *msg_buf, size_t msg_len)
{
int ret = 0;
mutex_lock(&ac->mutex);
if (!ac->protocol)
return ceph_auth_build_hello(ac, msg_buf, msg_len);
BUG_ON(!ac->ops);
if (ac->ops->should_authenticate(ac))
return ceph_build_auth_request(ac, msg_buf, msg_len);
return 0;
ret = ceph_auth_build_hello(ac, msg_buf, msg_len);
else if (ac->ops->should_authenticate(ac))
ret = ceph_build_auth_request(ac, msg_buf, msg_len);
mutex_unlock(&ac->mutex);
return ret;
}
int ceph_auth_is_authenticated(struct ceph_auth_client *ac)
{
if (!ac->ops)
return 0;
return ac->ops->is_authenticated(ac);
int ret = 0;
mutex_lock(&ac->mutex);
if (ac->ops)
ret = ac->ops->is_authenticated(ac);
mutex_unlock(&ac->mutex);
return ret;
}
EXPORT_SYMBOL(ceph_auth_is_authenticated);
int ceph_auth_create_authorizer(struct ceph_auth_client *ac,
int peer_type,
struct ceph_auth_handshake *auth)
{
int ret = 0;
mutex_lock(&ac->mutex);
if (ac->ops && ac->ops->create_authorizer)
ret = ac->ops->create_authorizer(ac, peer_type, auth);
mutex_unlock(&ac->mutex);
return ret;
}
EXPORT_SYMBOL(ceph_auth_create_authorizer);
void ceph_auth_destroy_authorizer(struct ceph_auth_client *ac,
struct ceph_authorizer *a)
{
mutex_lock(&ac->mutex);
if (ac->ops && ac->ops->destroy_authorizer)
ac->ops->destroy_authorizer(ac, a);
mutex_unlock(&ac->mutex);
}
EXPORT_SYMBOL(ceph_auth_destroy_authorizer);
int ceph_auth_update_authorizer(struct ceph_auth_client *ac,
int peer_type,
struct ceph_auth_handshake *a)
{
int ret = 0;
mutex_lock(&ac->mutex);
if (ac->ops && ac->ops->update_authorizer)
ret = ac->ops->update_authorizer(ac, peer_type, a);
mutex_unlock(&ac->mutex);
return ret;
}
EXPORT_SYMBOL(ceph_auth_update_authorizer);
int ceph_auth_verify_authorizer_reply(struct ceph_auth_client *ac,
struct ceph_authorizer *a, size_t len)
{
int ret = 0;
mutex_lock(&ac->mutex);
if (ac->ops && ac->ops->verify_authorizer_reply)
ret = ac->ops->verify_authorizer_reply(ac, a, len);
mutex_unlock(&ac->mutex);
return ret;
}
EXPORT_SYMBOL(ceph_auth_verify_authorizer_reply);
void ceph_auth_invalidate_authorizer(struct ceph_auth_client *ac, int peer_type)
{
mutex_lock(&ac->mutex);
if (ac->ops && ac->ops->invalidate_authorizer)
ac->ops->invalidate_authorizer(ac, peer_type);
mutex_unlock(&ac->mutex);
}
EXPORT_SYMBOL(ceph_auth_invalidate_authorizer);

24
net/ceph/auth_x.c
View File

@ -298,6 +298,7 @@ static int ceph_x_build_authorizer(struct ceph_auth_client *ac,
return -ENOMEM;
}
au->service = th->service;
au->secret_id = th->secret_id;
msg_a = au->buf->vec.iov_base;
msg_a->struct_v = 1;
@ -555,6 +556,26 @@ static int ceph_x_create_authorizer(
return 0;
}
static int ceph_x_update_authorizer(
struct ceph_auth_client *ac, int peer_type,
struct ceph_auth_handshake *auth)
{
struct ceph_x_authorizer *au;
struct ceph_x_ticket_handler *th;
th = get_ticket_handler(ac, peer_type);
if (IS_ERR(th))
return PTR_ERR(th);
au = (struct ceph_x_authorizer *)auth->authorizer;
if (au->secret_id < th->secret_id) {
dout("ceph_x_update_authorizer service %u secret %llu < %llu\n",
au->service, au->secret_id, th->secret_id);
return ceph_x_build_authorizer(ac, th, au);
}
return 0;
}
static int ceph_x_verify_authorizer_reply(struct ceph_auth_client *ac,
struct ceph_authorizer *a, size_t len)
{
@ -630,7 +651,7 @@ static void ceph_x_invalidate_authorizer(struct ceph_auth_client *ac,
th = get_ticket_handler(ac, peer_type);
if (!IS_ERR(th))
remove_ticket_handler(ac, th);
memset(&th->validity, 0, sizeof(th->validity));
}
@ -641,6 +662,7 @@ static const struct ceph_auth_client_ops ceph_x_ops = {
.build_request = ceph_x_build_request,
.handle_reply = ceph_x_handle_reply,
.create_authorizer = ceph_x_create_authorizer,
.update_authorizer = ceph_x_update_authorizer,
.verify_authorizer_reply = ceph_x_verify_authorizer_reply,
.destroy_authorizer = ceph_x_destroy_authorizer,
.invalidate_authorizer = ceph_x_invalidate_authorizer,

1
net/ceph/auth_x.h
View File

@ -29,6 +29,7 @@ struct ceph_x_authorizer {
struct ceph_buffer *buf;
unsigned int service;
u64 nonce;
u64 secret_id;
char reply_buf[128]; /* big enough for encrypted blob */
};

7
net/ceph/ceph_common.c
View File

@ -606,11 +606,17 @@ static int __init init_ceph_lib(void)
if (ret < 0)
goto out_crypto;
ret = ceph_osdc_setup();
if (ret < 0)
goto out_msgr;
pr_info("loaded (mon/osd proto %d/%d)\n",
CEPH_MONC_PROTOCOL, CEPH_OSDC_PROTOCOL);
return 0;
out_msgr:
ceph_msgr_exit();
out_crypto:
ceph_crypto_shutdown();
out_debugfs:
@ -622,6 +628,7 @@ out:
static void __exit exit_ceph_lib(void)
{
dout("exit_ceph_lib\n");
ceph_osdc_cleanup();
ceph_msgr_exit();
ceph_crypto_shutdown();
ceph_debugfs_cleanup();

4
net/ceph/debugfs.c
View File

@ -123,8 +123,8 @@ static int osdc_show(struct seq_file *s, void *pp)
mutex_lock(&osdc->request_mutex);
for (p = rb_first(&osdc->requests); p; p = rb_next(p)) {
struct ceph_osd_request *req;
unsigned int i;
int opcode;
int i;
req = rb_entry(p, struct ceph_osd_request, r_node);
@ -142,7 +142,7 @@ static int osdc_show(struct seq_file *s, void *pp)
seq_printf(s, "\t");
for (i = 0; i < req->r_num_ops; i++) {
opcode = le16_to_cpu(req->r_request_ops[i].op);
opcode = req->r_ops[i].op;
seq_printf(s, "\t%s", ceph_osd_op_name(opcode));
}

997
net/ceph/messenger.c
View File

File diff suppressed because it is too large Load Diff

7
net/ceph/mon_client.c
View File

@ -737,7 +737,7 @@ static void delayed_work(struct work_struct *work)
__validate_auth(monc);
if (monc->auth->ops->is_authenticated(monc->auth))
if (ceph_auth_is_authenticated(monc->auth))
__send_subscribe(monc);
}
__schedule_delayed(monc);
@ -892,8 +892,7 @@ static void handle_auth_reply(struct ceph_mon_client *monc,
mutex_lock(&monc->mutex);
had_debugfs_info = have_debugfs_info(monc);
if (monc->auth->ops)
was_auth = monc->auth->ops->is_authenticated(monc->auth);
was_auth = ceph_auth_is_authenticated(monc->auth);
monc->pending_auth = 0;
ret = ceph_handle_auth_reply(monc->auth, msg->front.iov_base,
msg->front.iov_len,
@ -904,7 +903,7 @@ static void handle_auth_reply(struct ceph_mon_client *monc,
wake_up_all(&monc->client->auth_wq);
} else if (ret > 0) {
__send_prepared_auth_request(monc, ret);
} else if (!was_auth && monc->auth->ops->is_authenticated(monc->auth)) {
} else if (!was_auth && ceph_auth_is_authenticated(monc->auth)) {
dout("authenticated, starting session\n");
monc->client->msgr.inst.name.type = CEPH_ENTITY_TYPE_CLIENT;

1049
net/ceph/osd_client.c
View File

File diff suppressed because it is too large Load Diff

45
net/ceph/osdmap.c
View File

@ -654,24 +654,6 @@ static int osdmap_set_max_osd(struct ceph_osdmap *map, int max)
return 0;
}
static int __decode_pgid(void **p, void *end, struct ceph_pg *pg)
{
u8 v;
ceph_decode_need(p, end, 1+8+4+4, bad);
v = ceph_decode_8(p);
if (v != 1)
goto bad;
pg->pool = ceph_decode_64(p);
pg->seed = ceph_decode_32(p);
*p += 4; /* skip preferred */
return 0;
bad:
dout("error decoding pgid\n");
return -EINVAL;
}
/*
* decode a full map.
*/
@ -765,7 +747,7 @@ struct ceph_osdmap *osdmap_decode(void **p, void *end)
struct ceph_pg pgid;
struct ceph_pg_mapping *pg;
err = __decode_pgid(p, end, &pgid);
err = ceph_decode_pgid(p, end, &pgid);
if (err)
goto bad;
ceph_decode_need(p, end, sizeof(u32), bad);
@ -983,7 +965,7 @@ struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
struct ceph_pg pgid;
u32 pglen;
err = __decode_pgid(p, end, &pgid);
err = ceph_decode_pgid(p, end, &pgid);
if (err)
goto bad;
ceph_decode_need(p, end, sizeof(u32), bad);
@ -1111,27 +1093,22 @@ EXPORT_SYMBOL(ceph_calc_file_object_mapping);
* calculate an object layout (i.e. pgid) from an oid,
* file_layout, and osdmap
*/
int ceph_calc_object_layout(struct ceph_pg *pg,
const char *oid,
struct ceph_file_layout *fl,
struct ceph_osdmap *osdmap)
int ceph_calc_ceph_pg(struct ceph_pg *pg, const char *oid,
struct ceph_osdmap *osdmap, uint64_t pool)
{
unsigned int num, num_mask;
struct ceph_pg_pool_info *pool;
struct ceph_pg_pool_info *pool_info;
BUG_ON(!osdmap);
pg->pool = le32_to_cpu(fl->fl_pg_pool);
pool = __lookup_pg_pool(&osdmap->pg_pools, pg->pool);
if (!pool)
pool_info = __lookup_pg_pool(&osdmap->pg_pools, pool);
if (!pool_info)
return -EIO;
pg->seed = ceph_str_hash(pool->object_hash, oid, strlen(oid));
num = pool->pg_num;
num_mask = pool->pg_num_mask;
pg->pool = pool;
pg->seed = ceph_str_hash(pool_info->object_hash, oid, strlen(oid));
dout("calc_object_layout '%s' pgid %lld.%x\n", oid, pg->pool, pg->seed);
dout("%s '%s' pgid %lld.%x\n", __func__, oid, pg->pool, pg->seed);
return 0;
}
EXPORT_SYMBOL(ceph_calc_object_layout);
EXPORT_SYMBOL(ceph_calc_ceph_pg);
/*
* Calculate raw osd vector for the given pgid. Return pointer to osd

78
net/ceph/snapshot.c Normal file
View File

@ -0,0 +1,78 @@
/*
* snapshot.c Ceph snapshot context utility routines (part of libceph)
*
* Copyright (C) 2013 Inktank Storage, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
#include <stddef.h>
#include <linux/types.h>
#include <linux/export.h>
#include <linux/ceph/libceph.h>
/*
* Ceph snapshot contexts are reference counted objects, and the
* returned structure holds a single reference. Acquire additional
* references with ceph_get_snap_context(), and release them with
* ceph_put_snap_context(). When the reference count reaches zero
* the entire structure is freed.
*/
/*
* Create a new ceph snapshot context large enough to hold the
* indicated number of snapshot ids (which can be 0). Caller has
* to fill in snapc->seq and snapc->snaps[0..snap_count-1].
*
* Returns a null pointer if an error occurs.
*/
struct ceph_snap_context *ceph_create_snap_context(u32 snap_count,
gfp_t gfp_flags)
{
struct ceph_snap_context *snapc;
size_t size;
size = sizeof (struct ceph_snap_context);
size += snap_count * sizeof (snapc->snaps[0]);
snapc = kzalloc(size, gfp_flags);
if (!snapc)
return NULL;
atomic_set(&snapc->nref, 1);
snapc->num_snaps = snap_count;
return snapc;
}
EXPORT_SYMBOL(ceph_create_snap_context);
struct ceph_snap_context *ceph_get_snap_context(struct ceph_snap_context *sc)
{
if (sc)
atomic_inc(&sc->nref);
return sc;
}
EXPORT_SYMBOL(ceph_get_snap_context);
void ceph_put_snap_context(struct ceph_snap_context *sc)
{
if (!sc)
return;
if (atomic_dec_and_test(&sc->nref)) {
/*printk(" deleting snap_context %p\n", sc);*/
kfree(sc);
}
}
EXPORT_SYMBOL(ceph_put_snap_context);