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The big ticket items are: 

- support for rbd "fancy" striping (myself).  The striping feature bit
   is now fully implemented, allowing mapping v2 images with non-default
   striping patterns.  This completes support for --image-format 2.
 
 - CephFS quota support (Luis Henriques and Zheng Yan).  This set is
   based on the new SnapRealm code in the upcoming v13.y.z ("Mimic")
   release.  Quota handling will be rejected on older filesystems.
 
 - memory usage improvements in CephFS (Chengguang Xu).  Directory
   specific bits have been split out of ceph_file_info and some effort
   went into improving cap reservation code to avoid OOM crashes.
 
 Also included a bunch of assorted fixes all over the place from
 Chengguang and others.
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Merge tag 'ceph-for-4.17-rc1' of git://github.com/ceph/ceph-client

Pull ceph updates from Ilya Dryomov:
 "The big ticket items are:

   - support for rbd "fancy" striping (myself).

     The striping feature bit is now fully implemented, allowing mapping
     v2 images with non-default striping patterns. This completes
     support for --image-format 2.

   - CephFS quota support (Luis Henriques and Zheng Yan).

     This set is based on the new SnapRealm code in the upcoming v13.y.z
     ("Mimic") release. Quota handling will be rejected on older
     filesystems.

   - memory usage improvements in CephFS (Chengguang Xu).

     Directory specific bits have been split out of ceph_file_info and
     some effort went into improving cap reservation code to avoid OOM
     crashes.

  Also included a bunch of assorted fixes all over the place from
  Chengguang and others"

* tag 'ceph-for-4.17-rc1' of git://github.com/ceph/ceph-client: (67 commits)
  ceph: quota: report root dir quota usage in statfs
  ceph: quota: add counter for snaprealms with quota
  ceph: quota: cache inode pointer in ceph_snap_realm
  ceph: fix root quota realm check
  ceph: don't check quota for snap inode
  ceph: quota: update MDS when max_bytes is approaching
  ceph: quota: support for ceph.quota.max_bytes
  ceph: quota: don't allow cross-quota renames
  ceph: quota: support for ceph.quota.max_files
  ceph: quota: add initial infrastructure to support cephfs quotas
  rbd: remove VLA usage
  rbd: fix spelling mistake: "reregisteration" -> "reregistration"
  ceph: rename function drop_leases() to a more descriptive name
  ceph: fix invalid point dereference for error case in mdsc destroy
  ceph: return proper bool type to caller instead of pointer
  ceph: optimize memory usage
  ceph: optimize mds session register
  libceph, ceph: add __init attribution to init funcitons
  ceph: filter out used flags when printing unused open flags
  ceph: don't wait on writeback when there is no more dirty pages
  ...
This commit is contained in:
Linus Torvalds 2018-04-10 12:25:30 -07:00
parent a7726f6b61 9122eed528
commit b284d4d5a6
35 changed files with 2669 additions and 2031 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
Documentation/filesystems/ceph.txt
View File

@ -62,6 +62,18 @@ subdirectories, and a summation of all nested file sizes. This makes
the identification of large disk space consumers relatively quick, as
no 'du' or similar recursive scan of the file system is required.
Finally, Ceph also allows quotas to be set on any directory in the system.
The quota can restrict the number of bytes or the number of files stored
beneath that point in the directory hierarchy. Quotas can be set using
extended attributes 'ceph.quota.max_files' and 'ceph.quota.max_bytes', eg:
setfattr -n ceph.quota.max_bytes -v 100000000 /some/dir
getfattr -n ceph.quota.max_bytes /some/dir
A limitation of the current quotas implementation is that it relies on the
cooperation of the client mounting the file system to stop writers when a
limit is reached. A modified or adversarial client cannot be prevented
from writing as much data as it needs.
Mount Syntax
============
@ -137,6 +149,10 @@ Mount Options
noasyncreaddir
Do not use the dcache as above for readdir.
noquotadf
Report overall filesystem usage in statfs instead of using the root
directory quota.
More Information
================

2658
drivers/block/rbd.c
View File

File diff suppressed because it is too large Load Diff

2
fs/ceph/Makefile
View File

@ -6,7 +6,7 @@
obj-$(CONFIG_CEPH_FS) += ceph.o
ceph-y := super.o inode.o dir.o file.o locks.o addr.o ioctl.o \
export.o caps.o snap.o xattr.o \
export.o caps.o snap.o xattr.o quota.o \
mds_client.o mdsmap.o strings.o ceph_frag.o \
debugfs.o

63
fs/ceph/addr.c
View File

@ -15,6 +15,7 @@
#include "mds_client.h"
#include "cache.h"
#include <linux/ceph/osd_client.h>
#include <linux/ceph/striper.h>
/*
* Ceph address space ops.
@ -438,7 +439,7 @@ static int ceph_readpages(struct file *file, struct address_space *mapping,
{
struct inode *inode = file_inode(file);
struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
struct ceph_file_info *ci = file->private_data;
struct ceph_file_info *fi = file->private_data;
struct ceph_rw_context *rw_ctx;
int rc = 0;
int max = 0;
@ -452,7 +453,7 @@ static int ceph_readpages(struct file *file, struct address_space *mapping,
if (rc == 0)
goto out;
rw_ctx = ceph_find_rw_context(ci);
rw_ctx = ceph_find_rw_context(fi);
max = fsc->mount_options->rsize >> PAGE_SHIFT;
dout("readpages %p file %p ctx %p nr_pages %d max %d\n",
inode, file, rw_ctx, nr_pages, max);
@ -800,7 +801,7 @@ static int ceph_writepages_start(struct address_space *mapping,
struct ceph_osd_request *req = NULL;
struct ceph_writeback_ctl ceph_wbc;
bool should_loop, range_whole = false;
bool stop, done = false;
bool done = false;
dout("writepages_start %p (mode=%s)\n", inode,
wbc->sync_mode == WB_SYNC_NONE ? "NONE" :
@ -856,7 +857,7 @@ retry:
* in that range can be associated with newer snapc.
* They are not writeable until we write all dirty pages
* associated with 'snapc' get written */
if (index > 0 || wbc->sync_mode != WB_SYNC_NONE)
if (index > 0)
should_loop = true;
dout(" non-head snapc, range whole\n");
}
@ -864,8 +865,7 @@ retry:
ceph_put_snap_context(last_snapc);
last_snapc = snapc;
stop = false;
while (!stop && index <= end) {
while (!done && index <= end) {
int num_ops = 0, op_idx;
unsigned i, pvec_pages, max_pages, locked_pages = 0;
struct page **pages = NULL, **data_pages;
@ -898,16 +898,30 @@ get_more_pages:
unlock_page(page);
continue;
}
if (strip_unit_end && (page->index > strip_unit_end)) {
dout("end of strip unit %p\n", page);
/* only if matching snap context */
pgsnapc = page_snap_context(page);
if (pgsnapc != snapc) {
dout("page snapc %p %lld != oldest %p %lld\n",
pgsnapc, pgsnapc->seq, snapc, snapc->seq);
if (!should_loop &&
!ceph_wbc.head_snapc &&
wbc->sync_mode != WB_SYNC_NONE)
should_loop = true;
unlock_page(page);
break;
continue;
}
if (page_offset(page) >= ceph_wbc.i_size) {
dout("%p page eof %llu\n",
page, ceph_wbc.i_size);
/* not done if range_cyclic */
stop = true;
if (ceph_wbc.size_stable ||
page_offset(page) >= i_size_read(inode))
mapping->a_ops->invalidatepage(page,
0, PAGE_SIZE);
unlock_page(page);
continue;
}
if (strip_unit_end && (page->index > strip_unit_end)) {
dout("end of strip unit %p\n", page);
unlock_page(page);
break;
}
@ -921,15 +935,6 @@ get_more_pages:
wait_on_page_writeback(page);
}
/* only if matching snap context */
pgsnapc = page_snap_context(page);
if (pgsnapc != snapc) {
dout("page snapc %p %lld != oldest %p %lld\n",
pgsnapc, pgsnapc->seq, snapc, snapc->seq);
unlock_page(page);
continue;
}
if (!clear_page_dirty_for_io(page)) {
dout("%p !clear_page_dirty_for_io\n", page);
unlock_page(page);
@ -945,19 +950,15 @@ get_more_pages:
if (locked_pages == 0) {
u64 objnum;
u64 objoff;
u32 xlen;
/* prepare async write request */
offset = (u64)page_offset(page);
len = wsize;
rc = ceph_calc_file_object_mapping(&ci->i_layout,
offset, len,
&objnum, &objoff,
&len);
if (rc < 0) {
unlock_page(page);
break;
}
ceph_calc_file_object_mapping(&ci->i_layout,
offset, wsize,
&objnum, &objoff,
&xlen);
len = xlen;
num_ops = 1;
strip_unit_end = page->index +
@ -1146,7 +1147,7 @@ new_request:
* we tagged for writeback prior to entering this loop.
*/
if (wbc->nr_to_write <= 0 && wbc->sync_mode == WB_SYNC_NONE)
done = stop = true;
done = true;
release_pvec_pages:
dout("pagevec_release on %d pages (%p)\n", (int)pvec.nr,

4
fs/ceph/cache.c
View File

@ -51,7 +51,7 @@ static const struct fscache_cookie_def ceph_fscache_fsid_object_def = {
.type = FSCACHE_COOKIE_TYPE_INDEX,
};
int ceph_fscache_register(void)
int __init ceph_fscache_register(void)
{
return fscache_register_netfs(&ceph_cache_netfs);
}
@ -135,7 +135,7 @@ static enum fscache_checkaux ceph_fscache_inode_check_aux(
if (memcmp(data, &aux, sizeof(aux)) != 0)
return FSCACHE_CHECKAUX_OBSOLETE;
dout("ceph inode 0x%p cached okay", ci);
dout("ceph inode 0x%p cached okay\n", ci);
return FSCACHE_CHECKAUX_OKAY;
}

138
fs/ceph/caps.c
View File

@ -184,36 +184,54 @@ int ceph_reserve_caps(struct ceph_mds_client *mdsc,
mdsc->caps_avail_count);
spin_unlock(&mdsc->caps_list_lock);
for (i = have; i < need; i++) {
retry:
for (i = have; i < need; ) {
cap = kmem_cache_alloc(ceph_cap_cachep, GFP_NOFS);
if (!cap) {
if (!trimmed) {
for (j = 0; j < mdsc->max_sessions; j++) {
s = __ceph_lookup_mds_session(mdsc, j);
if (!s)
continue;
mutex_unlock(&mdsc->mutex);
mutex_lock(&s->s_mutex);
max_caps = s->s_nr_caps - (need - i);
ceph_trim_caps(mdsc, s, max_caps);
mutex_unlock(&s->s_mutex);
ceph_put_mds_session(s);
mutex_lock(&mdsc->mutex);
}
trimmed = true;
goto retry;
} else {
pr_warn("reserve caps ctx=%p ENOMEM "
"need=%d got=%d\n",
ctx, need, have + alloc);
goto out_nomem;
}
if (cap) {
list_add(&cap->caps_item, &newcaps);
alloc++;
i++;
continue;
}
list_add(&cap->caps_item, &newcaps);
alloc++;
if (!trimmed) {
for (j = 0; j < mdsc->max_sessions; j++) {
s = __ceph_lookup_mds_session(mdsc, j);
if (!s)
continue;
mutex_unlock(&mdsc->mutex);
mutex_lock(&s->s_mutex);
max_caps = s->s_nr_caps - (need - i);
ceph_trim_caps(mdsc, s, max_caps);
mutex_unlock(&s->s_mutex);
ceph_put_mds_session(s);
mutex_lock(&mdsc->mutex);
}
trimmed = true;
spin_lock(&mdsc->caps_list_lock);
if (mdsc->caps_avail_count) {
int more_have;
if (mdsc->caps_avail_count >= need - i)
more_have = need - i;
else
more_have = mdsc->caps_avail_count;
i += more_have;
have += more_have;
mdsc->caps_avail_count -= more_have;
mdsc->caps_reserve_count += more_have;
}
spin_unlock(&mdsc->caps_list_lock);
continue;
}
pr_warn("reserve caps ctx=%p ENOMEM need=%d got=%d\n",
ctx, need, have + alloc);
goto out_nomem;
}
BUG_ON(have + alloc != need);
@ -234,16 +252,28 @@ retry:
return 0;
out_nomem:
while (!list_empty(&newcaps)) {
cap = list_first_entry(&newcaps,
struct ceph_cap, caps_item);
list_del(&cap->caps_item);
kmem_cache_free(ceph_cap_cachep, cap);
}
spin_lock(&mdsc->caps_list_lock);
mdsc->caps_avail_count += have;
mdsc->caps_reserve_count -= have;
while (!list_empty(&newcaps)) {
cap = list_first_entry(&newcaps,
struct ceph_cap, caps_item);
list_del(&cap->caps_item);
/* Keep some preallocated caps around (ceph_min_count), to
* avoid lots of free/alloc churn. */
if (mdsc->caps_avail_count >=
mdsc->caps_reserve_count + mdsc->caps_min_count) {
kmem_cache_free(ceph_cap_cachep, cap);
} else {
mdsc->caps_avail_count++;
mdsc->caps_total_count++;
list_add(&cap->caps_item, &mdsc->caps_list);
}
}
BUG_ON(mdsc->caps_total_count != mdsc->caps_use_count +
mdsc->caps_reserve_count +
mdsc->caps_avail_count);
@ -254,12 +284,26 @@ out_nomem:
int ceph_unreserve_caps(struct ceph_mds_client *mdsc,
struct ceph_cap_reservation *ctx)
{
int i;
struct ceph_cap *cap;
dout("unreserve caps ctx=%p count=%d\n", ctx, ctx->count);
if (ctx->count) {
spin_lock(&mdsc->caps_list_lock);
BUG_ON(mdsc->caps_reserve_count < ctx->count);
mdsc->caps_reserve_count -= ctx->count;
mdsc->caps_avail_count += ctx->count;
if (mdsc->caps_avail_count >=
mdsc->caps_reserve_count + mdsc->caps_min_count) {
mdsc->caps_total_count -= ctx->count;
for (i = 0; i < ctx->count; i++) {
cap = list_first_entry(&mdsc->caps_list,
struct ceph_cap, caps_item);
list_del(&cap->caps_item);
kmem_cache_free(ceph_cap_cachep, cap);
}
} else {
mdsc->caps_avail_count += ctx->count;
}
ctx->count = 0;
dout("unreserve caps %d = %d used + %d resv + %d avail\n",
mdsc->caps_total_count, mdsc->caps_use_count,
@ -285,7 +329,23 @@ struct ceph_cap *ceph_get_cap(struct ceph_mds_client *mdsc,
mdsc->caps_use_count++;
mdsc->caps_total_count++;
spin_unlock(&mdsc->caps_list_lock);
} else {
spin_lock(&mdsc->caps_list_lock);
if (mdsc->caps_avail_count) {
BUG_ON(list_empty(&mdsc->caps_list));
mdsc->caps_avail_count--;
mdsc->caps_use_count++;
cap = list_first_entry(&mdsc->caps_list,
struct ceph_cap, caps_item);
list_del(&cap->caps_item);
BUG_ON(mdsc->caps_total_count != mdsc->caps_use_count +
mdsc->caps_reserve_count + mdsc->caps_avail_count);
}
spin_unlock(&mdsc->caps_list_lock);
}
return cap;
}
@ -341,6 +401,8 @@ void ceph_reservation_status(struct ceph_fs_client *fsc,
{
struct ceph_mds_client *mdsc = fsc->mdsc;
spin_lock(&mdsc->caps_list_lock);
if (total)
*total = mdsc->caps_total_count;
if (avail)
@ -351,6 +413,8 @@ void ceph_reservation_status(struct ceph_fs_client *fsc,
*reserved = mdsc->caps_reserve_count;
if (min)
*min = mdsc->caps_min_count;
spin_unlock(&mdsc->caps_list_lock);
}
/*
@ -639,9 +703,11 @@ void ceph_add_cap(struct inode *inode,
}
spin_lock(&realm->inodes_with_caps_lock);
ci->i_snap_realm = realm;
list_add(&ci->i_snap_realm_item,
&realm->inodes_with_caps);
ci->i_snap_realm = realm;
if (realm->ino == ci->i_vino.ino)
realm->inode = inode;
spin_unlock(&realm->inodes_with_caps_lock);
if (oldrealm)

8
fs/ceph/debugfs.c
View File

@ -260,7 +260,7 @@ int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
goto out;
fsc->debugfs_mdsmap = debugfs_create_file("mdsmap",
0600,
0400,
fsc->client->debugfs_dir,
fsc,
&mdsmap_show_fops);
@ -268,7 +268,7 @@ int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
goto out;
fsc->debugfs_mds_sessions = debugfs_create_file("mds_sessions",
0600,
0400,
fsc->client->debugfs_dir,
fsc,
&mds_sessions_show_fops);
@ -276,7 +276,7 @@ int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
goto out;
fsc->debugfs_mdsc = debugfs_create_file("mdsc",
0600,
0400,
fsc->client->debugfs_dir,
fsc,
&mdsc_show_fops);
@ -292,7 +292,7 @@ int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
goto out;
fsc->debugfs_dentry_lru = debugfs_create_file("dentry_lru",
0600,
0400,
fsc->client->debugfs_dir,
fsc,
&dentry_lru_show_fops);

204
fs/ceph/dir.c
View File

@ -101,18 +101,18 @@ static int fpos_cmp(loff_t l, loff_t r)
* regardless of what dir changes take place on the
* server.
*/
static int note_last_dentry(struct ceph_file_info *fi, const char *name,
static int note_last_dentry(struct ceph_dir_file_info *dfi, const char *name,
int len, unsigned next_offset)
{
char *buf = kmalloc(len+1, GFP_KERNEL);
if (!buf)
return -ENOMEM;
kfree(fi->last_name);
fi->last_name = buf;
memcpy(fi->last_name, name, len);
fi->last_name[len] = 0;
fi->next_offset = next_offset;
dout("note_last_dentry '%s'\n", fi->last_name);
kfree(dfi->last_name);
dfi->last_name = buf;
memcpy(dfi->last_name, name, len);
dfi->last_name[len] = 0;
dfi->next_offset = next_offset;
dout("note_last_dentry '%s'\n", dfi->last_name);
return 0;
}
@ -174,7 +174,7 @@ __dcache_find_get_entry(struct dentry *parent, u64 idx,
static int __dcache_readdir(struct file *file, struct dir_context *ctx,
int shared_gen)
{
struct ceph_file_info *fi = file->private_data;
struct ceph_dir_file_info *dfi = file->private_data;
struct dentry *parent = file->f_path.dentry;
struct inode *dir = d_inode(parent);
struct dentry *dentry, *last = NULL;
@ -221,7 +221,7 @@ static int __dcache_readdir(struct file *file, struct dir_context *ctx,
bool emit_dentry = false;
dentry = __dcache_find_get_entry(parent, idx++, &cache_ctl);
if (!dentry) {
fi->flags |= CEPH_F_ATEND;
dfi->file_info.flags |= CEPH_F_ATEND;
err = 0;
break;
}
@ -272,33 +272,33 @@ out:
if (last) {
int ret;
di = ceph_dentry(last);
ret = note_last_dentry(fi, last->d_name.name, last->d_name.len,
ret = note_last_dentry(dfi, last->d_name.name, last->d_name.len,
fpos_off(di->offset) + 1);
if (ret < 0)
err = ret;
dput(last);
/* last_name no longer match cache index */
if (fi->readdir_cache_idx >= 0) {
fi->readdir_cache_idx = -1;
fi->dir_release_count = 0;
if (dfi->readdir_cache_idx >= 0) {
dfi->readdir_cache_idx = -1;
dfi->dir_release_count = 0;
}
}
return err;
}
static bool need_send_readdir(struct ceph_file_info *fi, loff_t pos)
static bool need_send_readdir(struct ceph_dir_file_info *dfi, loff_t pos)
{
if (!fi->last_readdir)
if (!dfi->last_readdir)
return true;
if (is_hash_order(pos))
return !ceph_frag_contains_value(fi->frag, fpos_hash(pos));
return !ceph_frag_contains_value(dfi->frag, fpos_hash(pos));
else
return fi->frag != fpos_frag(pos);
return dfi->frag != fpos_frag(pos);
}
static int ceph_readdir(struct file *file, struct dir_context *ctx)
{
struct ceph_file_info *fi = file->private_data;
struct ceph_dir_file_info *dfi = file->private_data;
struct inode *inode = file_inode(file);
struct ceph_inode_info *ci = ceph_inode(inode);
struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
@ -309,7 +309,7 @@ static int ceph_readdir(struct file *file, struct dir_context *ctx)
struct ceph_mds_reply_info_parsed *rinfo;
dout("readdir %p file %p pos %llx\n", inode, file, ctx->pos);
if (fi->flags & CEPH_F_ATEND)
if (dfi->file_info.flags & CEPH_F_ATEND)
return 0;
/* always start with . and .. */
@ -350,15 +350,15 @@ static int ceph_readdir(struct file *file, struct dir_context *ctx)
/* proceed with a normal readdir */
more:
/* do we have the correct frag content buffered? */
if (need_send_readdir(fi, ctx->pos)) {
if (need_send_readdir(dfi, ctx->pos)) {
struct ceph_mds_request *req;
int op = ceph_snap(inode) == CEPH_SNAPDIR ?
CEPH_MDS_OP_LSSNAP : CEPH_MDS_OP_READDIR;
/* discard old result, if any */
if (fi->last_readdir) {
ceph_mdsc_put_request(fi->last_readdir);
fi->last_readdir = NULL;
if (dfi->last_readdir) {
ceph_mdsc_put_request(dfi->last_readdir);
dfi->last_readdir = NULL;
}
if (is_hash_order(ctx->pos)) {
@ -372,7 +372,7 @@ more:
}
dout("readdir fetching %llx.%llx frag %x offset '%s'\n",
ceph_vinop(inode), frag, fi->last_name);
ceph_vinop(inode), frag, dfi->last_name);
req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS);
if (IS_ERR(req))
return PTR_ERR(req);
@ -388,8 +388,8 @@ more:
__set_bit(CEPH_MDS_R_DIRECT_IS_HASH, &req->r_req_flags);
req->r_inode_drop = CEPH_CAP_FILE_EXCL;
}
if (fi->last_name) {
req->r_path2 = kstrdup(fi->last_name, GFP_KERNEL);
if (dfi->last_name) {
req->r_path2 = kstrdup(dfi->last_name, GFP_KERNEL);
if (!req->r_path2) {
ceph_mdsc_put_request(req);
return -ENOMEM;
@ -399,10 +399,10 @@ more:
cpu_to_le32(fpos_hash(ctx->pos));
}
req->r_dir_release_cnt = fi->dir_release_count;
req->r_dir_ordered_cnt = fi->dir_ordered_count;
req->r_readdir_cache_idx = fi->readdir_cache_idx;
req->r_readdir_offset = fi->next_offset;
req->r_dir_release_cnt = dfi->dir_release_count;
req->r_dir_ordered_cnt = dfi->dir_ordered_count;
req->r_readdir_cache_idx = dfi->readdir_cache_idx;
req->r_readdir_offset = dfi->next_offset;
req->r_args.readdir.frag = cpu_to_le32(frag);
req->r_args.readdir.flags =
cpu_to_le16(CEPH_READDIR_REPLY_BITFLAGS);
@ -426,35 +426,35 @@ more:
if (le32_to_cpu(rinfo->dir_dir->frag) != frag) {
frag = le32_to_cpu(rinfo->dir_dir->frag);
if (!rinfo->hash_order) {
fi->next_offset = req->r_readdir_offset;
dfi->next_offset = req->r_readdir_offset;
/* adjust ctx->pos to beginning of frag */
ctx->pos = ceph_make_fpos(frag,
fi->next_offset,
dfi->next_offset,
false);
}
}
fi->frag = frag;
fi->last_readdir = req;
dfi->frag = frag;
dfi->last_readdir = req;
if (test_bit(CEPH_MDS_R_DID_PREPOPULATE, &req->r_req_flags)) {
fi->readdir_cache_idx = req->r_readdir_cache_idx;
if (fi->readdir_cache_idx < 0) {
dfi->readdir_cache_idx = req->r_readdir_cache_idx;
if (dfi->readdir_cache_idx < 0) {
/* preclude from marking dir ordered */
fi->dir_ordered_count = 0;
dfi->dir_ordered_count = 0;
} else if (ceph_frag_is_leftmost(frag) &&
fi->next_offset == 2) {
dfi->next_offset == 2) {
/* note dir version at start of readdir so
* we can tell if any dentries get dropped */
fi->dir_release_count = req->r_dir_release_cnt;
fi->dir_ordered_count = req->r_dir_ordered_cnt;
dfi->dir_release_count = req->r_dir_release_cnt;
dfi->dir_ordered_count = req->r_dir_ordered_cnt;
}
} else {
dout("readdir !did_prepopulate");
dout("readdir !did_prepopulate\n");
/* disable readdir cache */
fi->readdir_cache_idx = -1;
dfi->readdir_cache_idx = -1;
/* preclude from marking dir complete */
fi->dir_release_count = 0;
dfi->dir_release_count = 0;
}
/* note next offset and last dentry name */
@ -463,19 +463,19 @@ more:
rinfo->dir_entries + (rinfo->dir_nr-1);
unsigned next_offset = req->r_reply_info.dir_end ?
2 : (fpos_off(rde->offset) + 1);
err = note_last_dentry(fi, rde->name, rde->name_len,
err = note_last_dentry(dfi, rde->name, rde->name_len,
next_offset);
if (err)
return err;
} else if (req->r_reply_info.dir_end) {
fi->next_offset = 2;
dfi->next_offset = 2;
/* keep last name */
}
}
rinfo = &fi->last_readdir->r_reply_info;
rinfo = &dfi->last_readdir->r_reply_info;
dout("readdir frag %x num %d pos %llx chunk first %llx\n",
fi->frag, rinfo->dir_nr, ctx->pos,
dfi->frag, rinfo->dir_nr, ctx->pos,
rinfo->dir_nr ? rinfo->dir_entries[0].offset : 0LL);
i = 0;
@ -519,52 +519,55 @@ more:
ctx->pos++;
}
ceph_mdsc_put_request(fi->last_readdir);
fi->last_readdir = NULL;
ceph_mdsc_put_request(dfi->last_readdir);
dfi->last_readdir = NULL;
if (fi->next_offset > 2) {
frag = fi->frag;
if (dfi->next_offset > 2) {
frag = dfi->frag;
goto more;
}
/* more frags? */
if (!ceph_frag_is_rightmost(fi->frag)) {
frag = ceph_frag_next(fi->frag);
if (!ceph_frag_is_rightmost(dfi->frag)) {
frag = ceph_frag_next(dfi->frag);
if (is_hash_order(ctx->pos)) {
loff_t new_pos = ceph_make_fpos(ceph_frag_value(frag),
fi->next_offset, true);
dfi->next_offset, true);
if (new_pos > ctx->pos)
ctx->pos = new_pos;
/* keep last_name */
} else {
ctx->pos = ceph_make_fpos(frag, fi->next_offset, false);
kfree(fi->last_name);
fi->last_name = NULL;
ctx->pos = ceph_make_fpos(frag, dfi->next_offset,
false);
kfree(dfi->last_name);
dfi->last_name = NULL;
}
dout("readdir next frag is %x\n", frag);
goto more;
}
fi->flags |= CEPH_F_ATEND;
dfi->file_info.flags |= CEPH_F_ATEND;
/*
* if dir_release_count still matches the dir, no dentries
* were released during the whole readdir, and we should have
* the complete dir contents in our cache.
*/
if (atomic64_read(&ci->i_release_count) == fi->dir_release_count) {
if (atomic64_read(&ci->i_release_count) ==
dfi->dir_release_count) {
spin_lock(&ci->i_ceph_lock);
if (fi->dir_ordered_count == atomic64_read(&ci->i_ordered_count)) {
if (dfi->dir_ordered_count ==
atomic64_read(&ci->i_ordered_count)) {
dout(" marking %p complete and ordered\n", inode);
/* use i_size to track number of entries in
* readdir cache */
BUG_ON(fi->readdir_cache_idx < 0);
i_size_write(inode, fi->readdir_cache_idx *
BUG_ON(dfi->readdir_cache_idx < 0);
i_size_write(inode, dfi->readdir_cache_idx *
sizeof(struct dentry*));
} else {
dout(" marking %p complete\n", inode);
}
__ceph_dir_set_complete(ci, fi->dir_release_count,
fi->dir_ordered_count);
__ceph_dir_set_complete(ci, dfi->dir_release_count,
dfi->dir_ordered_count);
spin_unlock(&ci->i_ceph_lock);
}
@ -572,25 +575,25 @@ more:
return 0;
}
static void reset_readdir(struct ceph_file_info *fi)
static void reset_readdir(struct ceph_dir_file_info *dfi)
{
if (fi->last_readdir) {
ceph_mdsc_put_request(fi->last_readdir);
fi->last_readdir = NULL;
if (dfi->last_readdir) {
ceph_mdsc_put_request(dfi->last_readdir);
dfi->last_readdir = NULL;
}
kfree(fi->last_name);
fi->last_name = NULL;
fi->dir_release_count = 0;
fi->readdir_cache_idx = -1;
fi->next_offset = 2; /* compensate for . and .. */
fi->flags &= ~CEPH_F_ATEND;
kfree(dfi->last_name);
dfi->last_name = NULL;
dfi->dir_release_count = 0;
dfi->readdir_cache_idx = -1;
dfi->next_offset = 2; /* compensate for . and .. */
dfi->file_info.flags &= ~CEPH_F_ATEND;
}
/*
* discard buffered readdir content on seekdir(0), or seek to new frag,
* or seek prior to current chunk
*/
static bool need_reset_readdir(struct ceph_file_info *fi, loff_t new_pos)
static bool need_reset_readdir(struct ceph_dir_file_info *dfi, loff_t new_pos)
{
struct ceph_mds_reply_info_parsed *rinfo;
loff_t chunk_offset;
@ -599,10 +602,10 @@ static bool need_reset_readdir(struct ceph_file_info *fi, loff_t new_pos)
if (is_hash_order(new_pos)) {
/* no need to reset last_name for a forward seek when
* dentries are sotred in hash order */
} else if (fi->frag != fpos_frag(new_pos)) {
} else if (dfi->frag != fpos_frag(new_pos)) {
return true;
}
rinfo = fi->last_readdir ? &fi->last_readdir->r_reply_info : NULL;
rinfo = dfi->last_readdir ? &dfi->last_readdir->r_reply_info : NULL;
if (!rinfo || !rinfo->dir_nr)
return true;
chunk_offset = rinfo->dir_entries[0].offset;
@ -612,7 +615,7 @@ static bool need_reset_readdir(struct ceph_file_info *fi, loff_t new_pos)
static loff_t ceph_dir_llseek(struct file *file, loff_t offset, int whence)
{
struct ceph_file_info *fi = file->private_data;
struct ceph_dir_file_info *dfi = file->private_data;
struct inode *inode = file->f_mapping->host;
loff_t retval;
@ -630,20 +633,20 @@ static loff_t ceph_dir_llseek(struct file *file, loff_t offset, int whence)
}
if (offset >= 0) {
if (need_reset_readdir(fi, offset)) {
if (need_reset_readdir(dfi, offset)) {
dout("dir_llseek dropping %p content\n", file);
reset_readdir(fi);
reset_readdir(dfi);
} else if (is_hash_order(offset) && offset > file->f_pos) {
/* for hash offset, we don't know if a forward seek
* is within same frag */
fi->dir_release_count = 0;
fi->readdir_cache_idx = -1;
dfi->dir_release_count = 0;
dfi->readdir_cache_idx = -1;
}
if (offset != file->f_pos) {
file->f_pos = offset;
file->f_version = 0;
fi->flags &= ~CEPH_F_ATEND;
dfi->file_info.flags &= ~CEPH_F_ATEND;
}
retval = offset;
}
@ -824,6 +827,9 @@ static int ceph_mknod(struct inode *dir, struct dentry *dentry,
if (ceph_snap(dir) != CEPH_NOSNAP)
return -EROFS;
if (ceph_quota_is_max_files_exceeded(dir))
return -EDQUOT;
err = ceph_pre_init_acls(dir, &mode, &acls);
if (err < 0)
return err;
@ -877,6 +883,9 @@ static int ceph_symlink(struct inode *dir, struct dentry *dentry,
if (ceph_snap(dir) != CEPH_NOSNAP)
return -EROFS;
if (ceph_quota_is_max_files_exceeded(dir))
return -EDQUOT;
dout("symlink in dir %p dentry %p to '%s'\n", dir, dentry, dest);
req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SYMLINK, USE_AUTH_MDS);
if (IS_ERR(req)) {
@ -926,6 +935,12 @@ static int ceph_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
goto out;
}
if (op == CEPH_MDS_OP_MKDIR &&
ceph_quota_is_max_files_exceeded(dir)) {
err = -EDQUOT;
goto out;
}
mode |= S_IFDIR;
err = ceph_pre_init_acls(dir, &mode, &acls);
if (err < 0)
@ -1065,6 +1080,11 @@ static int ceph_rename(struct inode *old_dir, struct dentry *old_dentry,
else
return -EROFS;
}
/* don't allow cross-quota renames */
if ((old_dir != new_dir) &&
(!ceph_quota_is_same_realm(old_dir, new_dir)))
return -EXDEV;
dout("rename dir %p dentry %p to dir %p dentry %p\n",
old_dir, old_dentry, new_dir, new_dentry);
req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS);
@ -1351,7 +1371,7 @@ static void ceph_d_prune(struct dentry *dentry)
static ssize_t ceph_read_dir(struct file *file, char __user *buf, size_t size,
loff_t *ppos)
{
struct ceph_file_info *cf = file->private_data;
struct ceph_dir_file_info *dfi = file->private_data;
struct inode *inode = file_inode(file);
struct ceph_inode_info *ci = ceph_inode(inode);
int left;
@ -1360,12 +1380,12 @@ static ssize_t ceph_read_dir(struct file *file, char __user *buf, size_t size,
if (!ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb), DIRSTAT))
return -EISDIR;
if (!cf->dir_info) {
cf->dir_info = kmalloc(bufsize, GFP_KERNEL);
if (!cf->dir_info)
if (!dfi->dir_info) {
dfi->dir_info = kmalloc(bufsize, GFP_KERNEL);
if (!dfi->dir_info)
return -ENOMEM;
cf->dir_info_len =
snprintf(cf->dir_info, bufsize,
dfi->dir_info_len =
snprintf(dfi->dir_info, bufsize,
"entries: %20lld\n"
" files: %20lld\n"
" subdirs: %20lld\n"
@ -1385,10 +1405,10 @@ static ssize_t ceph_read_dir(struct file *file, char __user *buf, size_t size,
(long)ci->i_rctime.tv_nsec);
}
if (*ppos >= cf->dir_info_len)
if (*ppos >= dfi->dir_info_len)
return 0;
size = min_t(unsigned, size, cf->dir_info_len-*ppos);
left = copy_to_user(buf, cf->dir_info + *ppos, size);
size = min_t(unsigned, size, dfi->dir_info_len-*ppos);
left = copy_to_user(buf, dfi->dir_info + *ppos, size);
if (left == size)
return -EFAULT;
*ppos += (size - left);

117
fs/ceph/file.c
View File

@ -30,6 +30,8 @@ static __le32 ceph_flags_sys2wire(u32 flags)
break;
}
flags &= ~O_ACCMODE;
#define ceph_sys2wire(a) if (flags & a) { wire_flags |= CEPH_##a; flags &= ~a; }
ceph_sys2wire(O_CREAT);
@ -41,7 +43,7 @@ static __le32 ceph_flags_sys2wire(u32 flags)
#undef ceph_sys2wire
if (flags)
dout("unused open flags: %x", flags);
dout("unused open flags: %x\n", flags);
return cpu_to_le32(wire_flags);
}
@ -159,13 +161,50 @@ out:
return req;
}
static int ceph_init_file_info(struct inode *inode, struct file *file,
int fmode, bool isdir)
{
struct ceph_file_info *fi;
dout("%s %p %p 0%o (%s)\n", __func__, inode, file,
inode->i_mode, isdir ? "dir" : "regular");
BUG_ON(inode->i_fop->release != ceph_release);
if (isdir) {
struct ceph_dir_file_info *dfi =
kmem_cache_zalloc(ceph_dir_file_cachep, GFP_KERNEL);
if (!dfi) {
ceph_put_fmode(ceph_inode(inode), fmode); /* clean up */
return -ENOMEM;
}
file->private_data = dfi;
fi = &dfi->file_info;
dfi->next_offset = 2;
dfi->readdir_cache_idx = -1;
} else {
fi = kmem_cache_zalloc(ceph_file_cachep, GFP_KERNEL);
if (!fi) {
ceph_put_fmode(ceph_inode(inode), fmode); /* clean up */
return -ENOMEM;
}
file->private_data = fi;
}
fi->fmode = fmode;
spin_lock_init(&fi->rw_contexts_lock);
INIT_LIST_HEAD(&fi->rw_contexts);
return 0;
}
/*
* initialize private struct file data.
* if we fail, clean up by dropping fmode reference on the ceph_inode
*/
static int ceph_init_file(struct inode *inode, struct file *file, int fmode)
{
struct ceph_file_info *cf;
int ret = 0;
switch (inode->i_mode & S_IFMT) {
@ -173,22 +212,10 @@ static int ceph_init_file(struct inode *inode, struct file *file, int fmode)
ceph_fscache_register_inode_cookie(inode);
ceph_fscache_file_set_cookie(inode, file);
case S_IFDIR:
dout("init_file %p %p 0%o (regular)\n", inode, file,
inode->i_mode);
cf = kmem_cache_zalloc(ceph_file_cachep, GFP_KERNEL);
if (!cf) {
ceph_put_fmode(ceph_inode(inode), fmode); /* clean up */
return -ENOMEM;
}
cf->fmode = fmode;
spin_lock_init(&cf->rw_contexts_lock);
INIT_LIST_HEAD(&cf->rw_contexts);
cf->next_offset = 2;
cf->readdir_cache_idx = -1;
file->private_data = cf;
BUG_ON(inode->i_fop->release != ceph_release);
ret = ceph_init_file_info(inode, file, fmode,
S_ISDIR(inode->i_mode));
if (ret)
return ret;
break;
case S_IFLNK:
@ -278,11 +305,11 @@ int ceph_open(struct inode *inode, struct file *file)
struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb);
struct ceph_mds_client *mdsc = fsc->mdsc;
struct ceph_mds_request *req;
struct ceph_file_info *cf = file->private_data;
struct ceph_file_info *fi = file->private_data;
int err;
int flags, fmode, wanted;
if (cf) {
if (fi) {
dout("open file %p is already opened\n", file);
return 0;
}
@ -375,7 +402,7 @@ int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
struct ceph_mds_request *req;
struct dentry *dn;
struct ceph_acls_info acls = {};
int mask;
int mask;
int err;
dout("atomic_open %p dentry %p '%pd' %s flags %d mode 0%o\n",
@ -386,6 +413,8 @@ int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
return -ENAMETOOLONG;
if (flags & O_CREAT) {
if (ceph_quota_is_max_files_exceeded(dir))
return -EDQUOT;
err = ceph_pre_init_acls(dir, &mode, &acls);
if (err < 0)
return err;
@ -460,16 +489,27 @@ out_acl:
int ceph_release(struct inode *inode, struct file *file)
{
struct ceph_inode_info *ci = ceph_inode(inode);
struct ceph_file_info *cf = file->private_data;
dout("release inode %p file %p\n", inode, file);
ceph_put_fmode(ci, cf->fmode);
if (cf->last_readdir)
ceph_mdsc_put_request(cf->last_readdir);
kfree(cf->last_name);
kfree(cf->dir_info);
WARN_ON(!list_empty(&cf->rw_contexts));
kmem_cache_free(ceph_file_cachep, cf);
if (S_ISDIR(inode->i_mode)) {
struct ceph_dir_file_info *dfi = file->private_data;
dout("release inode %p dir file %p\n", inode, file);
WARN_ON(!list_empty(&dfi->file_info.rw_contexts));
ceph_put_fmode(ci, dfi->file_info.fmode);
if (dfi->last_readdir)
ceph_mdsc_put_request(dfi->last_readdir);
kfree(dfi->last_name);
kfree(dfi->dir_info);
kmem_cache_free(ceph_dir_file_cachep, dfi);
} else {
struct ceph_file_info *fi = file->private_data;
dout("release inode %p regular file %p\n", inode, file);
WARN_ON(!list_empty(&fi->rw_contexts));
ceph_put_fmode(ci, fi->fmode);
kmem_cache_free(ceph_file_cachep, fi);
}
/* wake up anyone waiting for caps on this inode */
wake_up_all(&ci->i_cap_wq);
@ -1338,6 +1378,11 @@ retry_snap:
pos = iocb->ki_pos;
count = iov_iter_count(from);
if (ceph_quota_is_max_bytes_exceeded(inode, pos + count)) {
err = -EDQUOT;
goto out;
}
err = file_remove_privs(file);
if (err)
goto out;
@ -1419,6 +1464,7 @@ retry_snap:
if (written >= 0) {
int dirty;
spin_lock(&ci->i_ceph_lock);
ci->i_inline_version = CEPH_INLINE_NONE;
dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR,
@ -1426,6 +1472,8 @@ retry_snap:
spin_unlock(&ci->i_ceph_lock);
if (dirty)
__mark_inode_dirty(inode, dirty);
if (ceph_quota_is_max_bytes_approaching(inode, iocb->ki_pos))
ceph_check_caps(ci, CHECK_CAPS_NODELAY, NULL);
}
dout("aio_write %p %llx.%llx %llu~%u dropping cap refs on %s\n",
@ -1668,6 +1716,12 @@ static long ceph_fallocate(struct file *file, int mode,
goto unlock;
}
if (!(mode & (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE)) &&
ceph_quota_is_max_bytes_exceeded(inode, offset + length)) {
ret = -EDQUOT;
goto unlock;
}
if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) &&
!(mode & FALLOC_FL_PUNCH_HOLE)) {
ret = -ENOSPC;
@ -1716,6 +1770,9 @@ static long ceph_fallocate(struct file *file, int mode,
spin_unlock(&ci->i_ceph_lock);
if (dirty)
__mark_inode_dirty(inode, dirty);
if ((endoff > size) &&
ceph_quota_is_max_bytes_approaching(inode, endoff))
ceph_check_caps(ci, CHECK_CAPS_NODELAY, NULL);
}
ceph_put_cap_refs(ci, got);

26
fs/ceph/inode.c
View File

@ -441,6 +441,9 @@ struct inode *ceph_alloc_inode(struct super_block *sb)
atomic64_set(&ci->i_complete_seq[1], 0);
ci->i_symlink = NULL;
ci->i_max_bytes = 0;
ci->i_max_files = 0;
memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout));
RCU_INIT_POINTER(ci->i_layout.pool_ns, NULL);
@ -536,6 +539,9 @@ void ceph_destroy_inode(struct inode *inode)
ceph_queue_caps_release(inode);
if (__ceph_has_any_quota(ci))
ceph_adjust_quota_realms_count(inode, false);
/*
* we may still have a snap_realm reference if there are stray
* caps in i_snap_caps.
@ -548,6 +554,9 @@ void ceph_destroy_inode(struct inode *inode)
dout(" dropping residual ref to snap realm %p\n", realm);
spin_lock(&realm->inodes_with_caps_lock);
list_del_init(&ci->i_snap_realm_item);
ci->i_snap_realm = NULL;
if (realm->ino == ci->i_vino.ino)
realm->inode = NULL;
spin_unlock(&realm->inodes_with_caps_lock);
ceph_put_snap_realm(mdsc, realm);
}
@ -790,6 +799,8 @@ static int fill_inode(struct inode *inode, struct page *locked_page,
inode->i_rdev = le32_to_cpu(info->rdev);
inode->i_blkbits = fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1;
__ceph_update_quota(ci, iinfo->max_bytes, iinfo->max_files);
if ((new_version || (new_issued & CEPH_CAP_AUTH_SHARED)) &&
(issued & CEPH_CAP_AUTH_EXCL) == 0) {
inode->i_mode = le32_to_cpu(info->mode);
@ -1867,20 +1878,9 @@ retry:
* possibly truncate them.. so write AND block!
*/
if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) {
struct ceph_cap_snap *capsnap;
to = ci->i_truncate_size;
list_for_each_entry(capsnap, &ci->i_cap_snaps, ci_item) {
// MDS should have revoked Frw caps
WARN_ON_ONCE(capsnap->writing);
if (capsnap->dirty_pages && capsnap->size > to)
to = capsnap->size;
}
spin_unlock(&ci->i_ceph_lock);
dout("__do_pending_vmtruncate %p flushing snaps first\n",
inode);
truncate_pagecache(inode, to);
filemap_write_and_wait_range(&inode->i_data, 0,
inode->i_sb->s_maxbytes);
goto retry;
@ -2152,6 +2152,10 @@ int ceph_setattr(struct dentry *dentry, struct iattr *attr)
if (err != 0)
return err;
if ((attr->ia_valid & ATTR_SIZE) &&
ceph_quota_is_max_bytes_exceeded(inode, attr->ia_size))
return -EDQUOT;
err = __ceph_setattr(inode, attr);
if (err >= 0 && (attr->ia_valid & ATTR_MODE))

13
fs/ceph/ioctl.c
View File

@ -5,7 +5,7 @@
#include "super.h"
#include "mds_client.h"
#include "ioctl.h"
#include <linux/ceph/striper.h>
/*
* ioctls
@ -185,7 +185,7 @@ static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg)
&ceph_sb_to_client(inode->i_sb)->client->osdc;
struct ceph_object_locator oloc;
CEPH_DEFINE_OID_ONSTACK(oid);
u64 len = 1, olen;
u32 xlen;
u64 tmp;
struct ceph_pg pgid;
int r;
@ -195,13 +195,8 @@ static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg)
return -EFAULT;
down_read(&osdc->lock);
r = ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, len,
&dl.object_no, &dl.object_offset,
&olen);
if (r < 0) {
up_read(&osdc->lock);
return -EIO;
}
ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, 1,
&dl.object_no, &dl.object_offset, &xlen);
dl.file_offset -= dl.object_offset;
dl.object_size = ci->i_layout.object_size;
dl.block_size = ci->i_layout.stripe_unit;

20
fs/ceph/locks.c
View File

@ -95,7 +95,7 @@ static int ceph_lock_message(u8 lock_type, u16 operation, struct inode *inode,
owner = secure_addr(fl->fl_owner);
dout("ceph_lock_message: rule: %d, op: %d, owner: %llx, pid: %llu, "
"start: %llu, length: %llu, wait: %d, type: %d", (int)lock_type,
"start: %llu, length: %llu, wait: %d, type: %d\n", (int)lock_type,
(int)operation, owner, (u64)fl->fl_pid, fl->fl_start, length,
wait, fl->fl_type);
@ -132,7 +132,7 @@ static int ceph_lock_message(u8 lock_type, u16 operation, struct inode *inode,
}
ceph_mdsc_put_request(req);
dout("ceph_lock_message: rule: %d, op: %d, pid: %llu, start: %llu, "
"length: %llu, wait: %d, type: %d, err code %d", (int)lock_type,
"length: %llu, wait: %d, type: %d, err code %d\n", (int)lock_type,
(int)operation, (u64)fl->fl_pid, fl->fl_start,
length, wait, fl->fl_type, err);
return err;
@ -226,7 +226,7 @@ int ceph_lock(struct file *file, int cmd, struct file_lock *fl)
if (__mandatory_lock(file->f_mapping->host) && fl->fl_type != F_UNLCK)
return -ENOLCK;
dout("ceph_lock, fl_owner: %p", fl->fl_owner);
dout("ceph_lock, fl_owner: %p\n", fl->fl_owner);
/* set wait bit as appropriate, then make command as Ceph expects it*/
if (IS_GETLK(cmd))
@ -264,7 +264,7 @@ int ceph_lock(struct file *file, int cmd, struct file_lock *fl)
err = ceph_lock_message(CEPH_LOCK_FCNTL, op, inode, lock_cmd, wait, fl);
if (!err) {
if (op == CEPH_MDS_OP_SETFILELOCK) {
dout("mds locked, locking locally");
dout("mds locked, locking locally\n");
err = posix_lock_file(file, fl, NULL);
if (err) {
/* undo! This should only happen if
@ -272,7 +272,7 @@ int ceph_lock(struct file *file, int cmd, struct file_lock *fl)
* deadlock. */
ceph_lock_message(CEPH_LOCK_FCNTL, op, inode,
CEPH_LOCK_UNLOCK, 0, fl);
dout("got %d on posix_lock_file, undid lock",
dout("got %d on posix_lock_file, undid lock\n",
err);
}
}
@ -294,7 +294,7 @@ int ceph_flock(struct file *file, int cmd, struct file_lock *fl)
if (fl->fl_type & LOCK_MAND)
return -EOPNOTSUPP;
dout("ceph_flock, fl_file: %p", fl->fl_file);
dout("ceph_flock, fl_file: %p\n", fl->fl_file);
spin_lock(&ci->i_ceph_lock);
if (ci->i_ceph_flags & CEPH_I_ERROR_FILELOCK) {
@ -329,7 +329,7 @@ int ceph_flock(struct file *file, int cmd, struct file_lock *fl)
ceph_lock_message(CEPH_LOCK_FLOCK,
CEPH_MDS_OP_SETFILELOCK,
inode, CEPH_LOCK_UNLOCK, 0, fl);
dout("got %d on locks_lock_file_wait, undid lock", err);
dout("got %d on locks_lock_file_wait, undid lock\n", err);
}
}
return err;
@ -356,7 +356,7 @@ void ceph_count_locks(struct inode *inode, int *fcntl_count, int *flock_count)
++(*flock_count);
spin_unlock(&ctx->flc_lock);
}
dout("counted %d flock locks and %d fcntl locks",
dout("counted %d flock locks and %d fcntl locks\n",
*flock_count, *fcntl_count);
}
@ -384,7 +384,7 @@ static int lock_to_ceph_filelock(struct file_lock *lock,
cephlock->type = CEPH_LOCK_UNLOCK;
break;
default:
dout("Have unknown lock type %d", lock->fl_type);
dout("Have unknown lock type %d\n", lock->fl_type);
err = -EINVAL;
}
@ -407,7 +407,7 @@ int ceph_encode_locks_to_buffer(struct inode *inode,
int seen_flock = 0;
int l = 0;
dout("encoding %d flock and %d fcntl locks", num_flock_locks,
dout("encoding %d flock and %d fcntl locks\n", num_flock_locks,
num_fcntl_locks);
if (!ctx)

87
fs/ceph/mds_client.c
View File

@ -100,6 +100,26 @@ static int parse_reply_info_in(void **p, void *end,
} else
info->inline_version = CEPH_INLINE_NONE;
if (features & CEPH_FEATURE_MDS_QUOTA) {
u8 struct_v, struct_compat;
u32 struct_len;
/*
* both struct_v and struct_compat are expected to be >= 1
*/
ceph_decode_8_safe(p, end, struct_v, bad);
ceph_decode_8_safe(p, end, struct_compat, bad);
if (!struct_v || !struct_compat)
goto bad;
ceph_decode_32_safe(p, end, struct_len, bad);
ceph_decode_need(p, end, struct_len, bad);
ceph_decode_64_safe(p, end, info->max_bytes, bad);
ceph_decode_64_safe(p, end, info->max_files, bad);
} else {
info->max_bytes = 0;
info->max_files = 0;
}
info->pool_ns_len = 0;
info->pool_ns_data = NULL;
if (features & CEPH_FEATURE_FS_FILE_LAYOUT_V2) {
@ -384,7 +404,7 @@ static struct ceph_mds_session *get_session(struct ceph_mds_session *s)
refcount_read(&s->s_ref)-1, refcount_read(&s->s_ref));
return s;
} else {
dout("mdsc get_session %p 0 -- FAIL", s);
dout("mdsc get_session %p 0 -- FAIL\n", s);
return NULL;
}
}
@ -419,9 +439,10 @@ struct ceph_mds_session *__ceph_lookup_mds_session(struct ceph_mds_client *mdsc,
static bool __have_session(struct ceph_mds_client *mdsc, int mds)
{
if (mds >= mdsc->max_sessions)
if (mds >= mdsc->max_sessions || !mdsc->sessions[mds])
return false;
return mdsc->sessions[mds];
else
return true;
}
static int __verify_registered_session(struct ceph_mds_client *mdsc,
@ -448,6 +469,25 @@ static struct ceph_mds_session *register_session(struct ceph_mds_client *mdsc,
s = kzalloc(sizeof(*s), GFP_NOFS);
if (!s)
return ERR_PTR(-ENOMEM);
if (mds >= mdsc->max_sessions) {
int newmax = 1 << get_count_order(mds + 1);
struct ceph_mds_session **sa;
dout("%s: realloc to %d\n", __func__, newmax);
sa = kcalloc(newmax, sizeof(void *), GFP_NOFS);
if (!sa)
goto fail_realloc;
if (mdsc->sessions) {
memcpy(sa, mdsc->sessions,
mdsc->max_sessions * sizeof(void *));
kfree(mdsc->sessions);
}
mdsc->sessions = sa;
mdsc->max_sessions = newmax;
}
dout("%s: mds%d\n", __func__, mds);
s->s_mdsc = mdsc;
s->s_mds = mds;
s->s_state = CEPH_MDS_SESSION_NEW;
@ -476,23 +516,6 @@ static struct ceph_mds_session *register_session(struct ceph_mds_client *mdsc,
INIT_LIST_HEAD(&s->s_cap_releases);
INIT_LIST_HEAD(&s->s_cap_flushing);
dout("register_session mds%d\n", mds);
if (mds >= mdsc->max_sessions) {
int newmax = 1 << get_count_order(mds+1);
struct ceph_mds_session **sa;
dout("register_session realloc to %d\n", newmax);
sa = kcalloc(newmax, sizeof(void *), GFP_NOFS);
if (!sa)
goto fail_realloc;
if (mdsc->sessions) {
memcpy(sa, mdsc->sessions,
mdsc->max_sessions * sizeof(void *));
kfree(mdsc->sessions);
}
mdsc->sessions = sa;
mdsc->max_sessions = newmax;
}
mdsc->sessions[mds] = s;
atomic_inc(&mdsc->num_sessions);
refcount_inc(&s->s_ref); /* one ref to sessions[], one to caller */
@ -2531,10 +2554,10 @@ static void handle_reply(struct ceph_mds_session *session, struct ceph_msg *msg)
* Otherwise we just have to return an ESTALE
*/
if (result == -ESTALE) {
dout("got ESTALE on request %llu", req->r_tid);
dout("got ESTALE on request %llu\n", req->r_tid);
req->r_resend_mds = -1;
if (req->r_direct_mode != USE_AUTH_MDS) {
dout("not using auth, setting for that now");
dout("not using auth, setting for that now\n");
req->r_direct_mode = USE_AUTH_MDS;
__do_request(mdsc, req);
mutex_unlock(&mdsc->mutex);
@ -2542,13 +2565,13 @@ static void handle_reply(struct ceph_mds_session *session, struct ceph_msg *msg)
} else {
int mds = __choose_mds(mdsc, req);
if (mds >= 0 && mds != req->r_session->s_mds) {
dout("but auth changed, so resending");
dout("but auth changed, so resending\n");
__do_request(mdsc, req);
mutex_unlock(&mdsc->mutex);
goto out;
}
}
dout("have to return ESTALE on request %llu", req->r_tid);
dout("have to return ESTALE on request %llu\n", req->r_tid);
}
@ -3470,13 +3493,12 @@ void ceph_mdsc_lease_send_msg(struct ceph_mds_session *session,
}
/*
* drop all leases (and dentry refs) in preparation for umount
* lock unlock sessions, to wait ongoing session activities
*/
static void drop_leases(struct ceph_mds_client *mdsc)
static void lock_unlock_sessions(struct ceph_mds_client *mdsc)
{
int i;
dout("drop_leases\n");
mutex_lock(&mdsc->mutex);
for (i = 0; i < mdsc->max_sessions; i++) {
struct ceph_mds_session *s = __ceph_lookup_mds_session(mdsc, i);
@ -3572,7 +3594,6 @@ int ceph_mdsc_init(struct ceph_fs_client *fsc)
if (!mdsc)
return -ENOMEM;
mdsc->fsc = fsc;
fsc->mdsc = mdsc;
mutex_init(&mdsc->mutex);
mdsc->mdsmap = kzalloc(sizeof(*mdsc->mdsmap), GFP_NOFS);
if (!mdsc->mdsmap) {
@ -3580,6 +3601,7 @@ int ceph_mdsc_init(struct ceph_fs_client *fsc)
return -ENOMEM;
}
fsc->mdsc = mdsc;
init_completion(&mdsc->safe_umount_waiters);
init_waitqueue_head(&mdsc->session_close_wq);
INIT_LIST_HEAD(&mdsc->waiting_for_map);
@ -3587,6 +3609,7 @@ int ceph_mdsc_init(struct ceph_fs_client *fsc)
atomic_set(&mdsc->num_sessions, 0);
mdsc->max_sessions = 0;
mdsc->stopping = 0;
atomic64_set(&mdsc->quotarealms_count, 0);
mdsc->last_snap_seq = 0;
init_rwsem(&mdsc->snap_rwsem);
mdsc->snap_realms = RB_ROOT;
@ -3660,7 +3683,7 @@ void ceph_mdsc_pre_umount(struct ceph_mds_client *mdsc)
dout("pre_umount\n");
mdsc->stopping = 1;
drop_leases(mdsc);
lock_unlock_sessions(mdsc);
ceph_flush_dirty_caps(mdsc);
wait_requests(mdsc);
@ -3858,6 +3881,9 @@ void ceph_mdsc_destroy(struct ceph_fs_client *fsc)
struct ceph_mds_client *mdsc = fsc->mdsc;
dout("mdsc_destroy %p\n", mdsc);
if (!mdsc)
return;
/* flush out any connection work with references to us */
ceph_msgr_flush();
@ -4077,6 +4103,9 @@ static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
case CEPH_MSG_CLIENT_LEASE:
handle_lease(mdsc, s, msg);
break;
case CEPH_MSG_CLIENT_QUOTA:
ceph_handle_quota(mdsc, s, msg);
break;
default:
pr_err("received unknown message type %d %s\n", type,

4
fs/ceph/mds_client.h
View File

@ -49,6 +49,8 @@ struct ceph_mds_reply_info_in {
char *inline_data;
u32 pool_ns_len;
char *pool_ns_data;
u64 max_bytes;
u64 max_files;
};
struct ceph_mds_reply_dir_entry {
@ -312,6 +314,8 @@ struct ceph_mds_client {
int max_sessions; /* len of s_mds_sessions */
int stopping; /* true if shutting down */
atomic64_t quotarealms_count; /* # realms with quota */
/*
* snap_rwsem will cover cap linkage into snaprealms, and
* realm snap contexts. (later, we can do per-realm snap

361
fs/ceph/quota.c Normal file
View File

@ -0,0 +1,361 @@
// SPDX-License-Identifier: GPL-2.0
/*
* quota.c - CephFS quota
*
* Copyright (C) 2017-2018 SUSE
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include <linux/statfs.h>
#include "super.h"
#include "mds_client.h"
void ceph_adjust_quota_realms_count(struct inode *inode, bool inc)
{
struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc;
if (inc)
atomic64_inc(&mdsc->quotarealms_count);
else
atomic64_dec(&mdsc->quotarealms_count);
}
static inline bool ceph_has_realms_with_quotas(struct inode *inode)
{
struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc;
return atomic64_read(&mdsc->quotarealms_count) > 0;
}
void ceph_handle_quota(struct ceph_mds_client *mdsc,
struct ceph_mds_session *session,
struct ceph_msg *msg)
{
struct super_block *sb = mdsc->fsc->sb;
struct ceph_mds_quota *h = msg->front.iov_base;
struct ceph_vino vino;
struct inode *inode;
struct ceph_inode_info *ci;
if (msg->front.iov_len != sizeof(*h)) {
pr_err("%s corrupt message mds%d len %d\n", __func__,
session->s_mds, (int)msg->front.iov_len);
ceph_msg_dump(msg);
return;
}
/* increment msg sequence number */
mutex_lock(&session->s_mutex);
session->s_seq++;
mutex_unlock(&session->s_mutex);
/* lookup inode */
vino.ino = le64_to_cpu(h->ino);
vino.snap = CEPH_NOSNAP;
inode = ceph_find_inode(sb, vino);
if (!inode) {
pr_warn("Failed to find inode %llu\n", vino.ino);
return;
}
ci = ceph_inode(inode);
spin_lock(&ci->i_ceph_lock);
ci->i_rbytes = le64_to_cpu(h->rbytes);
ci->i_rfiles = le64_to_cpu(h->rfiles);
ci->i_rsubdirs = le64_to_cpu(h->rsubdirs);
__ceph_update_quota(ci, le64_to_cpu(h->max_bytes),
le64_to_cpu(h->max_files));
spin_unlock(&ci->i_ceph_lock);
iput(inode);
}
/*
* This function walks through the snaprealm for an inode and returns the
* ceph_snap_realm for the first snaprealm that has quotas set (either max_files
* or max_bytes). If the root is reached, return the root ceph_snap_realm
* instead.
*
* Note that the caller is responsible for calling ceph_put_snap_realm() on the
* returned realm.
*/
static struct ceph_snap_realm *get_quota_realm(struct ceph_mds_client *mdsc,
struct inode *inode)
{
struct ceph_inode_info *ci = NULL;
struct ceph_snap_realm *realm, *next;
struct inode *in;
bool has_quota;
if (ceph_snap(inode) != CEPH_NOSNAP)
return NULL;
realm = ceph_inode(inode)->i_snap_realm;
if (realm)
ceph_get_snap_realm(mdsc, realm);
else
pr_err_ratelimited("get_quota_realm: ino (%llx.%llx) "
"null i_snap_realm\n", ceph_vinop(inode));
while (realm) {
spin_lock(&realm->inodes_with_caps_lock);
in = realm->inode ? igrab(realm->inode) : NULL;
spin_unlock(&realm->inodes_with_caps_lock);
if (!in)
break;
ci = ceph_inode(in);
has_quota = __ceph_has_any_quota(ci);
iput(in);
next = realm->parent;
if (has_quota || !next)
return realm;
ceph_get_snap_realm(mdsc, next);
ceph_put_snap_realm(mdsc, realm);
realm = next;
}
if (realm)
ceph_put_snap_realm(mdsc, realm);
return NULL;
}
bool ceph_quota_is_same_realm(struct inode *old, struct inode *new)
{
struct ceph_mds_client *mdsc = ceph_inode_to_client(old)->mdsc;
struct ceph_snap_realm *old_realm, *new_realm;
bool is_same;
down_read(&mdsc->snap_rwsem);
old_realm = get_quota_realm(mdsc, old);
new_realm = get_quota_realm(mdsc, new);
is_same = (old_realm == new_realm);
up_read(&mdsc->snap_rwsem);
if (old_realm)
ceph_put_snap_realm(mdsc, old_realm);
if (new_realm)
ceph_put_snap_realm(mdsc, new_realm);
return is_same;
}
enum quota_check_op {
QUOTA_CHECK_MAX_FILES_OP, /* check quota max_files limit */
QUOTA_CHECK_MAX_BYTES_OP, /* check quota max_files limit */
QUOTA_CHECK_MAX_BYTES_APPROACHING_OP /* check if quota max_files
limit is approaching */
};
/*
* check_quota_exceeded() will walk up the snaprealm hierarchy and, for each
* realm, it will execute quota check operation defined by the 'op' parameter.
* The snaprealm walk is interrupted if the quota check detects that the quota
* is exceeded or if the root inode is reached.
*/
static bool check_quota_exceeded(struct inode *inode, enum quota_check_op op,
loff_t delta)
{
struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc;
struct ceph_inode_info *ci;
struct ceph_snap_realm *realm, *next;
struct inode *in;
u64 max, rvalue;
bool exceeded = false;
if (ceph_snap(inode) != CEPH_NOSNAP)
return false;
down_read(&mdsc->snap_rwsem);
realm = ceph_inode(inode)->i_snap_realm;
if (realm)
ceph_get_snap_realm(mdsc, realm);
else
pr_err_ratelimited("check_quota_exceeded: ino (%llx.%llx) "
"null i_snap_realm\n", ceph_vinop(inode));
while (realm) {
spin_lock(&realm->inodes_with_caps_lock);
in = realm->inode ? igrab(realm->inode) : NULL;
spin_unlock(&realm->inodes_with_caps_lock);
if (!in)
break;
ci = ceph_inode(in);
spin_lock(&ci->i_ceph_lock);
if (op == QUOTA_CHECK_MAX_FILES_OP) {
max = ci->i_max_files;
rvalue = ci->i_rfiles + ci->i_rsubdirs;
} else {
max = ci->i_max_bytes;
rvalue = ci->i_rbytes;
}
spin_unlock(&ci->i_ceph_lock);
switch (op) {
case QUOTA_CHECK_MAX_FILES_OP:
exceeded = (max && (rvalue >= max));
break;
case QUOTA_CHECK_MAX_BYTES_OP:
exceeded = (max && (rvalue + delta > max));
break;
case QUOTA_CHECK_MAX_BYTES_APPROACHING_OP:
if (max) {
if (rvalue >= max)
exceeded = true;
else {
/*
* when we're writing more that 1/16th
* of the available space
*/
exceeded =
(((max - rvalue) >> 4) < delta);
}
}
break;
default:
/* Shouldn't happen */
pr_warn("Invalid quota check op (%d)\n", op);
exceeded = true; /* Just break the loop */
}
iput(in);
next = realm->parent;
if (exceeded || !next)
break;
ceph_get_snap_realm(mdsc, next);
ceph_put_snap_realm(mdsc, realm);
realm = next;
}
ceph_put_snap_realm(mdsc, realm);
up_read(&mdsc->snap_rwsem);
return exceeded;
}
/*
* ceph_quota_is_max_files_exceeded - check if we can create a new file
* @inode: directory where a new file is being created
*
* This functions returns true is max_files quota allows a new file to be
* created. It is necessary to walk through the snaprealm hierarchy (until the
* FS root) to check all realms with quotas set.
*/
bool ceph_quota_is_max_files_exceeded(struct inode *inode)
{
if (!ceph_has_realms_with_quotas(inode))
return false;
WARN_ON(!S_ISDIR(inode->i_mode));
return check_quota_exceeded(inode, QUOTA_CHECK_MAX_FILES_OP, 0);
}
/*
* ceph_quota_is_max_bytes_exceeded - check if we can write to a file
* @inode: inode being written
* @newsize: new size if write succeeds
*
* This functions returns true is max_bytes quota allows a file size to reach
* @newsize; it returns false otherwise.
*/
bool ceph_quota_is_max_bytes_exceeded(struct inode *inode, loff_t newsize)
{
loff_t size = i_size_read(inode);
if (!ceph_has_realms_with_quotas(inode))
return false;
/* return immediately if we're decreasing file size */
if (newsize <= size)
return false;
return check_quota_exceeded(inode, QUOTA_CHECK_MAX_BYTES_OP, (newsize - size));
}
/*
* ceph_quota_is_max_bytes_approaching - check if we're reaching max_bytes
* @inode: inode being written
* @newsize: new size if write succeeds
*
* This function returns true if the new file size @newsize will be consuming
* more than 1/16th of the available quota space; it returns false otherwise.
*/
bool ceph_quota_is_max_bytes_approaching(struct inode *inode, loff_t newsize)
{
loff_t size = ceph_inode(inode)->i_reported_size;
if (!ceph_has_realms_with_quotas(inode))
return false;
/* return immediately if we're decreasing file size */
if (newsize <= size)
return false;
return check_quota_exceeded(inode, QUOTA_CHECK_MAX_BYTES_APPROACHING_OP,
(newsize - size));
}
/*
* ceph_quota_update_statfs - if root has quota update statfs with quota status
* @fsc: filesystem client instance
* @buf: statfs to update
*
* If the mounted filesystem root has max_bytes quota set, update the filesystem
* statistics with the quota status.
*
* This function returns true if the stats have been updated, false otherwise.
*/
bool ceph_quota_update_statfs(struct ceph_fs_client *fsc, struct kstatfs *buf)
{
struct ceph_mds_client *mdsc = fsc->mdsc;
struct ceph_inode_info *ci;
struct ceph_snap_realm *realm;
struct inode *in;
u64 total = 0, used, free;
bool is_updated = false;
down_read(&mdsc->snap_rwsem);
realm = get_quota_realm(mdsc, d_inode(fsc->sb->s_root));
up_read(&mdsc->snap_rwsem);
if (!realm)
return false;
spin_lock(&realm->inodes_with_caps_lock);
in = realm->inode ? igrab(realm->inode) : NULL;
spin_unlock(&realm->inodes_with_caps_lock);
if (in) {
ci = ceph_inode(in);
spin_lock(&ci->i_ceph_lock);
if (ci->i_max_bytes) {
total = ci->i_max_bytes >> CEPH_BLOCK_SHIFT;
used = ci->i_rbytes >> CEPH_BLOCK_SHIFT;
/* It is possible for a quota to be exceeded.
* Report 'zero' in that case
*/
free = total > used ? total - used : 0;
}
spin_unlock(&ci->i_ceph_lock);
if (total) {
buf->f_blocks = total;
buf->f_bfree = free;
buf->f_bavail = free;
is_updated = true;
}
iput(in);
}
ceph_put_snap_realm(mdsc, realm);
return is_updated;
}

2
fs/ceph/snap.c
View File

@ -931,6 +931,8 @@ void ceph_handle_snap(struct ceph_mds_client *mdsc,
list_add(&ci->i_snap_realm_item,
&realm->inodes_with_caps);
ci->i_snap_realm = realm;
if (realm->ino == ci->i_vino.ino)
realm->inode = inode;
spin_unlock(&realm->inodes_with_caps_lock);
spin_unlock(&ci->i_ceph_lock);

50
fs/ceph/super.c
View File

@ -76,9 +76,18 @@ static int ceph_statfs(struct dentry *dentry, struct kstatfs *buf)
*/
buf->f_bsize = 1 << CEPH_BLOCK_SHIFT;
buf->f_frsize = 1 << CEPH_BLOCK_SHIFT;
buf->f_blocks = le64_to_cpu(st.kb) >> (CEPH_BLOCK_SHIFT-10);
buf->f_bfree = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10);
buf->f_bavail = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10);
/*
* By default use root quota for stats; fallback to overall filesystem
* usage if using 'noquotadf' mount option or if the root dir doesn't
* have max_bytes quota set.
*/
if (ceph_test_mount_opt(fsc, NOQUOTADF) ||
!ceph_quota_update_statfs(fsc, buf)) {
buf->f_blocks = le64_to_cpu(st.kb) >> (CEPH_BLOCK_SHIFT-10);
buf->f_bfree = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10);
buf->f_bavail = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10);
}
buf->f_files = le64_to_cpu(st.num_objects);
buf->f_ffree = -1;
@ -151,6 +160,8 @@ enum {
Opt_acl,
#endif
Opt_noacl,
Opt_quotadf,
Opt_noquotadf,
};
static match_table_t fsopt_tokens = {
@ -187,6 +198,8 @@ static match_table_t fsopt_tokens = {
{Opt_acl, "acl"},
#endif
{Opt_noacl, "noacl"},
{Opt_quotadf, "quotadf"},
{Opt_noquotadf, "noquotadf"},
{-1, NULL}
};
@ -314,13 +327,16 @@ static int parse_fsopt_token(char *c, void *private)
break;
case Opt_fscache:
fsopt->flags |= CEPH_MOUNT_OPT_FSCACHE;
kfree(fsopt->fscache_uniq);
fsopt->fscache_uniq = NULL;
break;
case Opt_nofscache:
fsopt->flags &= ~CEPH_MOUNT_OPT_FSCACHE;
kfree(fsopt->fscache_uniq);
fsopt->fscache_uniq = NULL;
break;
case Opt_poolperm:
fsopt->flags &= ~CEPH_MOUNT_OPT_NOPOOLPERM;
printk ("pool perm");
break;
case Opt_nopoolperm:
fsopt->flags |= CEPH_MOUNT_OPT_NOPOOLPERM;
@ -331,6 +347,12 @@ static int parse_fsopt_token(char *c, void *private)
case Opt_norequire_active_mds:
fsopt->flags |= CEPH_MOUNT_OPT_MOUNTWAIT;
break;
case Opt_quotadf:
fsopt->flags &= ~CEPH_MOUNT_OPT_NOQUOTADF;
break;
case Opt_noquotadf:
fsopt->flags |= CEPH_MOUNT_OPT_NOQUOTADF;
break;
#ifdef CONFIG_CEPH_FS_POSIX_ACL
case Opt_acl:
fsopt->sb_flags |= SB_POSIXACL;
@ -513,13 +535,12 @@ static int ceph_show_options(struct seq_file *m, struct dentry *root)
if ((fsopt->flags & CEPH_MOUNT_OPT_DCACHE) == 0)
seq_puts(m, ",nodcache");
if (fsopt->flags & CEPH_MOUNT_OPT_FSCACHE) {
if (fsopt->fscache_uniq)
seq_printf(m, ",fsc=%s", fsopt->fscache_uniq);
else
seq_puts(m, ",fsc");
seq_show_option(m, "fsc", fsopt->fscache_uniq);
}
if (fsopt->flags & CEPH_MOUNT_OPT_NOPOOLPERM)
seq_puts(m, ",nopoolperm");
if (fsopt->flags & CEPH_MOUNT_OPT_NOQUOTADF)
seq_puts(m, ",noquotadf");
#ifdef CONFIG_CEPH_FS_POSIX_ACL
if (fsopt->sb_flags & SB_POSIXACL)
@ -529,7 +550,7 @@ static int ceph_show_options(struct seq_file *m, struct dentry *root)
#endif
if (fsopt->mds_namespace)
seq_printf(m, ",mds_namespace=%s", fsopt->mds_namespace);
seq_show_option(m, "mds_namespace", fsopt->mds_namespace);
if (fsopt->wsize)
seq_printf(m, ",wsize=%d", fsopt->wsize);
if (fsopt->rsize != CEPH_MAX_READ_SIZE)
@ -679,6 +700,7 @@ struct kmem_cache *ceph_cap_cachep;
struct kmem_cache *ceph_cap_flush_cachep;
struct kmem_cache *ceph_dentry_cachep;
struct kmem_cache *ceph_file_cachep;
struct kmem_cache *ceph_dir_file_cachep;
static void ceph_inode_init_once(void *foo)
{
@ -698,8 +720,7 @@ static int __init init_caches(void)
if (!ceph_inode_cachep)
return -ENOMEM;
ceph_cap_cachep = KMEM_CACHE(ceph_cap,
SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD);
ceph_cap_cachep = KMEM_CACHE(ceph_cap, SLAB_MEM_SPREAD);
if (!ceph_cap_cachep)
goto bad_cap;
ceph_cap_flush_cachep = KMEM_CACHE(ceph_cap_flush,
@ -716,6 +737,10 @@ static int __init init_caches(void)
if (!ceph_file_cachep)
goto bad_file;
ceph_dir_file_cachep = KMEM_CACHE(ceph_dir_file_info, SLAB_MEM_SPREAD);
if (!ceph_dir_file_cachep)
goto bad_dir_file;
error = ceph_fscache_register();
if (error)
goto bad_fscache;
@ -723,6 +748,8 @@ static int __init init_caches(void)
return 0;
bad_fscache:
kmem_cache_destroy(ceph_dir_file_cachep);
bad_dir_file:
kmem_cache_destroy(ceph_file_cachep);
bad_file:
kmem_cache_destroy(ceph_dentry_cachep);
@ -748,6 +775,7 @@ static void destroy_caches(void)
kmem_cache_destroy(ceph_cap_flush_cachep);
kmem_cache_destroy(ceph_dentry_cachep);
kmem_cache_destroy(ceph_file_cachep);
kmem_cache_destroy(ceph_dir_file_cachep);
ceph_fscache_unregister();
}

42
fs/ceph/super.h
View File

@ -39,6 +39,7 @@
#define CEPH_MOUNT_OPT_FSCACHE (1<<10) /* use fscache */
#define CEPH_MOUNT_OPT_NOPOOLPERM (1<<11) /* no pool permission check */
#define CEPH_MOUNT_OPT_MOUNTWAIT (1<<12) /* mount waits if no mds is up */
#define CEPH_MOUNT_OPT_NOQUOTADF (1<<13) /* no root dir quota in statfs */
#define CEPH_MOUNT_OPT_DEFAULT CEPH_MOUNT_OPT_DCACHE
@ -310,6 +311,9 @@ struct ceph_inode_info {
u64 i_rbytes, i_rfiles, i_rsubdirs;
u64 i_files, i_subdirs;
/* quotas */
u64 i_max_bytes, i_max_files;
struct rb_root i_fragtree;
int i_fragtree_nsplits;
struct mutex i_fragtree_mutex;
@ -671,6 +675,10 @@ struct ceph_file_info {
spinlock_t rw_contexts_lock;
struct list_head rw_contexts;
};
struct ceph_dir_file_info {
struct ceph_file_info file_info;
/* readdir: position within the dir */
u32 frag;
@ -748,6 +756,7 @@ struct ceph_readdir_cache_control {
*/
struct ceph_snap_realm {
u64 ino;
struct inode *inode;
atomic_t nref;
struct rb_node node;
@ -1066,4 +1075,37 @@ extern int ceph_locks_to_pagelist(struct ceph_filelock *flocks,
extern int ceph_fs_debugfs_init(struct ceph_fs_client *client);
extern void ceph_fs_debugfs_cleanup(struct ceph_fs_client *client);
/* quota.c */
static inline bool __ceph_has_any_quota(struct ceph_inode_info *ci)
{
return ci->i_max_files || ci->i_max_bytes;
}
extern void ceph_adjust_quota_realms_count(struct inode *inode, bool inc);
static inline void __ceph_update_quota(struct ceph_inode_info *ci,
u64 max_bytes, u64 max_files)
{
bool had_quota, has_quota;
had_quota = __ceph_has_any_quota(ci);
ci->i_max_bytes = max_bytes;
ci->i_max_files = max_files;
has_quota = __ceph_has_any_quota(ci);
if (had_quota != has_quota)
ceph_adjust_quota_realms_count(&ci->vfs_inode, has_quota);
}
extern void ceph_handle_quota(struct ceph_mds_client *mdsc,
struct ceph_mds_session *session,
struct ceph_msg *msg);
extern bool ceph_quota_is_max_files_exceeded(struct inode *inode);
extern bool ceph_quota_is_same_realm(struct inode *old, struct inode *new);
extern bool ceph_quota_is_max_bytes_exceeded(struct inode *inode,
loff_t newlen);
extern bool ceph_quota_is_max_bytes_approaching(struct inode *inode,
loff_t newlen);
extern bool ceph_quota_update_statfs(struct ceph_fs_client *fsc,
struct kstatfs *buf);
#endif /* _FS_CEPH_SUPER_H */

44
fs/ceph/xattr.c
View File

@ -224,6 +224,31 @@ static size_t ceph_vxattrcb_dir_rctime(struct ceph_inode_info *ci, char *val,
(long)ci->i_rctime.tv_nsec);
}
/* quotas */
static bool ceph_vxattrcb_quota_exists(struct ceph_inode_info *ci)
{
return (ci->i_max_files || ci->i_max_bytes);
}
static size_t ceph_vxattrcb_quota(struct ceph_inode_info *ci, char *val,
size_t size)
{
return snprintf(val, size, "max_bytes=%llu max_files=%llu",
ci->i_max_bytes, ci->i_max_files);
}
static size_t ceph_vxattrcb_quota_max_bytes(struct ceph_inode_info *ci,
char *val, size_t size)
{
return snprintf(val, size, "%llu", ci->i_max_bytes);
}
static size_t ceph_vxattrcb_quota_max_files(struct ceph_inode_info *ci,
char *val, size_t size)
{
return snprintf(val, size, "%llu", ci->i_max_files);
}
#define CEPH_XATTR_NAME(_type, _name) XATTR_CEPH_PREFIX #_type "." #_name
#define CEPH_XATTR_NAME2(_type, _name, _name2) \
@ -247,6 +272,15 @@ static size_t ceph_vxattrcb_dir_rctime(struct ceph_inode_info *ci, char *val,
.hidden = true, \
.exists_cb = ceph_vxattrcb_layout_exists, \
}
#define XATTR_QUOTA_FIELD(_type, _name) \
{ \
.name = CEPH_XATTR_NAME(_type, _name), \
.name_size = sizeof(CEPH_XATTR_NAME(_type, _name)), \
.getxattr_cb = ceph_vxattrcb_ ## _type ## _ ## _name, \
.readonly = false, \
.hidden = true, \
.exists_cb = ceph_vxattrcb_quota_exists, \
}
static struct ceph_vxattr ceph_dir_vxattrs[] = {
{
@ -270,6 +304,16 @@ static struct ceph_vxattr ceph_dir_vxattrs[] = {
XATTR_NAME_CEPH(dir, rsubdirs),
XATTR_NAME_CEPH(dir, rbytes),
XATTR_NAME_CEPH(dir, rctime),
{
.name = "ceph.quota",
.name_size = sizeof("ceph.quota"),
.getxattr_cb = ceph_vxattrcb_quota,
.readonly = false,
.hidden = true,
.exists_cb = ceph_vxattrcb_quota_exists,
},
XATTR_QUOTA_FIELD(quota, max_bytes),
XATTR_QUOTA_FIELD(quota, max_files),
{ .name = NULL, 0 } /* Required table terminator */
};
static size_t ceph_dir_vxattrs_name_size; /* total size of all names */

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

@ -204,6 +204,7 @@ DEFINE_CEPH_FEATURE_DEPRECATED(63, 1, RESERVED_BROKEN, LUMINOUS) // client-facin
CEPH_FEATURE_OSD_PRIMARY_AFFINITY | \
CEPH_FEATURE_MSGR_KEEPALIVE2 | \
CEPH_FEATURE_OSD_POOLRESEND | \
CEPH_FEATURE_MDS_QUOTA | \
CEPH_FEATURE_CRUSH_V4 | \
CEPH_FEATURE_NEW_OSDOP_ENCODING | \
CEPH_FEATURE_SERVER_JEWEL | \

17
include/linux/ceph/ceph_fs.h
View File

@ -134,6 +134,7 @@ struct ceph_dir_layout {
#define CEPH_MSG_CLIENT_LEASE 0x311
#define CEPH_MSG_CLIENT_SNAP 0x312
#define CEPH_MSG_CLIENT_CAPRELEASE 0x313
#define CEPH_MSG_CLIENT_QUOTA 0x314
/* pool ops */
#define CEPH_MSG_POOLOP_REPLY 48
@ -807,4 +808,20 @@ struct ceph_mds_snap_realm {
} __attribute__ ((packed));
/* followed by my snap list, then prior parent snap list */
/*
* quotas
*/
struct ceph_mds_quota {
__le64 ino; /* ino */
struct ceph_timespec rctime;
__le64 rbytes; /* dir stats */
__le64 rfiles;
__le64 rsubdirs;
__u8 struct_v; /* compat */
__u8 struct_compat;
__le32 struct_len;
__le64 max_bytes; /* quota max. bytes */
__le64 max_files; /* quota max. files */
} __attribute__ ((packed));
#endif

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

@ -262,6 +262,7 @@ extern struct kmem_cache *ceph_cap_cachep;
extern struct kmem_cache *ceph_cap_flush_cachep;
extern struct kmem_cache *ceph_dentry_cachep;
extern struct kmem_cache *ceph_file_cachep;
extern struct kmem_cache *ceph_dir_file_cachep;
/* ceph_common.c */
extern bool libceph_compatible(void *data);

101
include/linux/ceph/messenger.h
View File

@ -76,6 +76,7 @@ enum ceph_msg_data_type {
#ifdef CONFIG_BLOCK
CEPH_MSG_DATA_BIO, /* data source/destination is a bio list */
#endif /* CONFIG_BLOCK */
CEPH_MSG_DATA_BVECS, /* data source/destination is a bio_vec array */
};
static __inline__ bool ceph_msg_data_type_valid(enum ceph_msg_data_type type)
@ -87,22 +88,106 @@ static __inline__ bool ceph_msg_data_type_valid(enum ceph_msg_data_type type)
#ifdef CONFIG_BLOCK
case CEPH_MSG_DATA_BIO:
#endif /* CONFIG_BLOCK */
case CEPH_MSG_DATA_BVECS:
return true;
default:
return false;
}
}
#ifdef CONFIG_BLOCK
struct ceph_bio_iter {
struct bio *bio;
struct bvec_iter iter;
};
#define __ceph_bio_iter_advance_step(it, n, STEP) do { \
unsigned int __n = (n), __cur_n; \
\
while (__n) { \
BUG_ON(!(it)->iter.bi_size); \
__cur_n = min((it)->iter.bi_size, __n); \
(void)(STEP); \
bio_advance_iter((it)->bio, &(it)->iter, __cur_n); \
if (!(it)->iter.bi_size && (it)->bio->bi_next) { \
dout("__ceph_bio_iter_advance_step next bio\n"); \
(it)->bio = (it)->bio->bi_next; \
(it)->iter = (it)->bio->bi_iter; \
} \
__n -= __cur_n; \
} \
} while (0)
/*
* Advance @it by @n bytes.
*/
#define ceph_bio_iter_advance(it, n) \
__ceph_bio_iter_advance_step(it, n, 0)
/*
* Advance @it by @n bytes, executing BVEC_STEP for each bio_vec.
*/
#define ceph_bio_iter_advance_step(it, n, BVEC_STEP) \
__ceph_bio_iter_advance_step(it, n, ({ \
struct bio_vec bv; \
struct bvec_iter __cur_iter; \
\
__cur_iter = (it)->iter; \
__cur_iter.bi_size = __cur_n; \
__bio_for_each_segment(bv, (it)->bio, __cur_iter, __cur_iter) \
(void)(BVEC_STEP); \
}))
#endif /* CONFIG_BLOCK */
struct ceph_bvec_iter {
struct bio_vec *bvecs;
struct bvec_iter iter;
};
#define __ceph_bvec_iter_advance_step(it, n, STEP) do { \
BUG_ON((n) > (it)->iter.bi_size); \
(void)(STEP); \
bvec_iter_advance((it)->bvecs, &(it)->iter, (n)); \
} while (0)
/*
* Advance @it by @n bytes.
*/
#define ceph_bvec_iter_advance(it, n) \
__ceph_bvec_iter_advance_step(it, n, 0)
/*
* Advance @it by @n bytes, executing BVEC_STEP for each bio_vec.
*/
#define ceph_bvec_iter_advance_step(it, n, BVEC_STEP) \
__ceph_bvec_iter_advance_step(it, n, ({ \
struct bio_vec bv; \
struct bvec_iter __cur_iter; \
\
__cur_iter = (it)->iter; \
__cur_iter.bi_size = (n); \
for_each_bvec(bv, (it)->bvecs, __cur_iter, __cur_iter) \
(void)(BVEC_STEP); \
}))
#define ceph_bvec_iter_shorten(it, n) do { \
BUG_ON((n) > (it)->iter.bi_size); \
(it)->iter.bi_size = (n); \
} while (0)
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;
struct ceph_bio_iter bio_pos;
u32 bio_length;
};
#endif /* CONFIG_BLOCK */
struct ceph_bvec_iter bvec_pos;
struct {
struct page **pages; /* NOT OWNER. */
size_t length; /* total # bytes */
@ -122,11 +207,9 @@ struct ceph_msg_data_cursor {
bool need_crc; /* crc update needed */
union {
#ifdef CONFIG_BLOCK
struct { /* bio */
struct bio *bio; /* bio from list */
struct bvec_iter bvec_iter;
};
struct ceph_bio_iter bio_iter;
#endif /* CONFIG_BLOCK */
struct bvec_iter bvec_iter;
struct { /* pages */
unsigned int page_offset; /* offset in page */
unsigned short page_index; /* index in array */
@ -290,9 +373,11 @@ extern void ceph_msg_data_add_pages(struct ceph_msg *msg, struct page **pages,
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);
void ceph_msg_data_add_bio(struct ceph_msg *msg, struct ceph_bio_iter *bio_pos,
u32 length);
#endif /* CONFIG_BLOCK */
void ceph_msg_data_add_bvecs(struct ceph_msg *msg,
struct ceph_bvec_iter *bvec_pos);
extern struct ceph_msg *ceph_msg_new(int type, int front_len, gfp_t flags,
bool can_fail);

19
include/linux/ceph/osd_client.h
View File

@ -57,6 +57,7 @@ enum ceph_osd_data_type {
#ifdef CONFIG_BLOCK
CEPH_OSD_DATA_TYPE_BIO,
#endif /* CONFIG_BLOCK */
CEPH_OSD_DATA_TYPE_BVECS,
};
struct ceph_osd_data {
@ -72,10 +73,11 @@ struct ceph_osd_data {
struct ceph_pagelist *pagelist;
#ifdef CONFIG_BLOCK
struct {
struct bio *bio; /* list of bios */
size_t bio_length; /* total in list */
struct ceph_bio_iter bio_pos;
u32 bio_length;
};
#endif /* CONFIG_BLOCK */
struct ceph_bvec_iter bvec_pos;
};
};
@ -405,10 +407,14 @@ 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);
void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req,
unsigned int which,
struct ceph_bio_iter *bio_pos,
u32 bio_length);
#endif /* CONFIG_BLOCK */
void osd_req_op_extent_osd_data_bvec_pos(struct ceph_osd_request *osd_req,
unsigned int which,
struct ceph_bvec_iter *bvec_pos);
extern void osd_req_op_cls_request_data_pagelist(struct ceph_osd_request *,
unsigned int which,
@ -418,6 +424,9 @@ extern void osd_req_op_cls_request_data_pages(struct ceph_osd_request *,
struct page **pages, u64 length,
u32 alignment, bool pages_from_pool,
bool own_pages);
void osd_req_op_cls_request_data_bvecs(struct ceph_osd_request *osd_req,
unsigned int which,
struct bio_vec *bvecs, u32 bytes);
extern void osd_req_op_cls_response_data_pages(struct ceph_osd_request *,
unsigned int which,
struct page **pages, u64 length,

6
include/linux/ceph/osdmap.h
View File

@ -5,7 +5,6 @@
#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>
/*
@ -280,11 +279,6 @@ bool ceph_osds_changed(const struct ceph_osds *old_acting,
const struct ceph_osds *new_acting,
bool any_change);
/* calculate mapping of a file extent to an object */
extern int ceph_calc_file_object_mapping(struct ceph_file_layout *layout,
u64 off, u64 len,
u64 *bno, u64 *oxoff, u64 *oxlen);
int __ceph_object_locator_to_pg(struct ceph_pg_pool_info *pi,
const struct ceph_object_id *oid,
const struct ceph_object_locator *oloc,

69
include/linux/ceph/striper.h Normal file
View File

@ -0,0 +1,69 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_CEPH_STRIPER_H
#define _LINUX_CEPH_STRIPER_H
#include <linux/list.h>
#include <linux/types.h>
struct ceph_file_layout;
void ceph_calc_file_object_mapping(struct ceph_file_layout *l,
u64 off, u64 len,
u64 *objno, u64 *objoff, u32 *xlen);
struct ceph_object_extent {
struct list_head oe_item;
u64 oe_objno;
u64 oe_off;
u64 oe_len;
};
static inline void ceph_object_extent_init(struct ceph_object_extent *ex)
{
INIT_LIST_HEAD(&ex->oe_item);
}
/*
* Called for each mapped stripe unit.
*
* @bytes: number of bytes mapped, i.e. the minimum of the full length
* requested (file extent length) or the remainder of the stripe
* unit within an object
*/
typedef void (*ceph_object_extent_fn_t)(struct ceph_object_extent *ex,
u32 bytes, void *arg);
int ceph_file_to_extents(struct ceph_file_layout *l, u64 off, u64 len,
struct list_head *object_extents,
struct ceph_object_extent *alloc_fn(void *arg),
void *alloc_arg,
ceph_object_extent_fn_t action_fn,
void *action_arg);
int ceph_iterate_extents(struct ceph_file_layout *l, u64 off, u64 len,
struct list_head *object_extents,
ceph_object_extent_fn_t action_fn,
void *action_arg);
struct ceph_file_extent {
u64 fe_off;
u64 fe_len;
};
static inline u64 ceph_file_extents_bytes(struct ceph_file_extent *file_extents,
u32 num_file_extents)
{
u64 bytes = 0;
u32 i;
for (i = 0; i < num_file_extents; i++)
bytes += file_extents[i].fe_len;
return bytes;
}
int ceph_extent_to_file(struct ceph_file_layout *l,
u64 objno, u64 objoff, u64 objlen,
struct ceph_file_extent **file_extents,
u32 *num_file_extents);
#endif

1
net/ceph/Makefile
View File

@ -8,6 +8,7 @@ libceph-y := ceph_common.o messenger.o msgpool.o buffer.o pagelist.o \
mon_client.o \
cls_lock_client.o \
osd_client.o osdmap.o crush/crush.o crush/mapper.o crush/hash.o \
striper.o \
debugfs.o \
auth.o auth_none.o \
crypto.o armor.o \

8
net/ceph/ceph_common.c
View File

@ -72,6 +72,7 @@ const char *ceph_msg_type_name(int type)
case CEPH_MSG_MON_GET_VERSION: return "mon_get_version";
case CEPH_MSG_MON_GET_VERSION_REPLY: return "mon_get_version_reply";
case CEPH_MSG_MDS_MAP: return "mds_map";
case CEPH_MSG_FS_MAP_USER: return "fs_map_user";
case CEPH_MSG_CLIENT_SESSION: return "client_session";
case CEPH_MSG_CLIENT_RECONNECT: return "client_reconnect";
case CEPH_MSG_CLIENT_REQUEST: return "client_request";
@ -79,8 +80,13 @@ const char *ceph_msg_type_name(int type)
case CEPH_MSG_CLIENT_REPLY: return "client_reply";
case CEPH_MSG_CLIENT_CAPS: return "client_caps";
case CEPH_MSG_CLIENT_CAPRELEASE: return "client_cap_release";
case CEPH_MSG_CLIENT_QUOTA: return "client_quota";
case CEPH_MSG_CLIENT_SNAP: return "client_snap";
case CEPH_MSG_CLIENT_LEASE: return "client_lease";
case CEPH_MSG_POOLOP_REPLY: return "poolop_reply";
case CEPH_MSG_POOLOP: return "poolop";
case CEPH_MSG_MON_COMMAND: return "mon_command";
case CEPH_MSG_MON_COMMAND_ACK: return "mon_command_ack";
case CEPH_MSG_OSD_MAP: return "osd_map";
case CEPH_MSG_OSD_OP: return "osd_op";
case CEPH_MSG_OSD_OPREPLY: return "osd_opreply";
@ -217,7 +223,7 @@ static int parse_fsid(const char *str, struct ceph_fsid *fsid)
if (i == 16)
err = 0;
dout("parse_fsid ret %d got fsid %pU", err, fsid);
dout("parse_fsid ret %d got fsid %pU\n", err, fsid);
return err;
}

6
net/ceph/crypto.c
View File

@ -347,10 +347,12 @@ struct key_type key_type_ceph = {
.destroy = ceph_key_destroy,
};
int ceph_crypto_init(void) {
int __init ceph_crypto_init(void)
{
return register_key_type(&key_type_ceph);
}
void ceph_crypto_shutdown(void) {
void ceph_crypto_shutdown(void)
{
unregister_key_type(&key_type_ceph);
}

17
net/ceph/debugfs.c
View File

@ -389,7 +389,7 @@ CEPH_DEFINE_SHOW_FUNC(monc_show)
CEPH_DEFINE_SHOW_FUNC(osdc_show)
CEPH_DEFINE_SHOW_FUNC(client_options_show)
int ceph_debugfs_init(void)
int __init ceph_debugfs_init(void)
{
ceph_debugfs_dir = debugfs_create_dir("ceph", NULL);
if (!ceph_debugfs_dir)
@ -418,7 +418,7 @@ int ceph_debugfs_client_init(struct ceph_client *client)
goto out;
client->monc.debugfs_file = debugfs_create_file("monc",
0600,
0400,
client->debugfs_dir,
client,
&monc_show_fops);
@ -426,7 +426,7 @@ int ceph_debugfs_client_init(struct ceph_client *client)
goto out;
client->osdc.debugfs_file = debugfs_create_file("osdc",
0600,
0400,
client->debugfs_dir,
client,
&osdc_show_fops);
@ -434,7 +434,7 @@ int ceph_debugfs_client_init(struct ceph_client *client)
goto out;
client->debugfs_monmap = debugfs_create_file("monmap",
0600,
0400,
client->debugfs_dir,
client,
&monmap_show_fops);
@ -442,7 +442,7 @@ int ceph_debugfs_client_init(struct ceph_client *client)
goto out;
client->debugfs_osdmap = debugfs_create_file("osdmap",
0600,
0400,
client->debugfs_dir,
client,
&osdmap_show_fops);
@ -450,7 +450,7 @@ int ceph_debugfs_client_init(struct ceph_client *client)
goto out;
client->debugfs_options = debugfs_create_file("client_options",
0600,
0400,
client->debugfs_dir,
client,
&client_options_show_fops);
@ -477,7 +477,7 @@ void ceph_debugfs_client_cleanup(struct ceph_client *client)
#else /* CONFIG_DEBUG_FS */
int ceph_debugfs_init(void)
int __init ceph_debugfs_init(void)
{
return 0;
}
@ -496,6 +496,3 @@ void ceph_debugfs_client_cleanup(struct ceph_client *client)
}
#endif /* CONFIG_DEBUG_FS */
EXPORT_SYMBOL(ceph_debugfs_init);
EXPORT_SYMBOL(ceph_debugfs_cleanup);

194
net/ceph/messenger.c
View File

@ -277,7 +277,7 @@ static void _ceph_msgr_exit(void)
ceph_msgr_slab_exit();
}
int ceph_msgr_init(void)
int __init ceph_msgr_init(void)
{
if (ceph_msgr_slab_init())
return -ENOMEM;
@ -299,7 +299,6 @@ int ceph_msgr_init(void)
return -ENOMEM;
}
EXPORT_SYMBOL(ceph_msgr_init);
void ceph_msgr_exit(void)
{
@ -307,7 +306,6 @@ void ceph_msgr_exit(void)
_ceph_msgr_exit();
}
EXPORT_SYMBOL(ceph_msgr_exit);
void ceph_msgr_flush(void)
{
@ -839,94 +837,113 @@ static void ceph_msg_data_bio_cursor_init(struct ceph_msg_data_cursor *cursor,
size_t length)
{
struct ceph_msg_data *data = cursor->data;
struct bio *bio;
struct ceph_bio_iter *it = &cursor->bio_iter;
BUG_ON(data->type != CEPH_MSG_DATA_BIO);
cursor->resid = min_t(size_t, length, data->bio_length);
*it = data->bio_pos;
if (cursor->resid < it->iter.bi_size)
it->iter.bi_size = cursor->resid;
bio = data->bio;
BUG_ON(!bio);
cursor->resid = min(length, data->bio_length);
cursor->bio = bio;
cursor->bvec_iter = bio->bi_iter;
cursor->last_piece =
cursor->resid <= bio_iter_len(bio, cursor->bvec_iter);
BUG_ON(cursor->resid < bio_iter_len(it->bio, it->iter));
cursor->last_piece = cursor->resid == bio_iter_len(it->bio, it->iter);
}
static struct page *ceph_msg_data_bio_next(struct ceph_msg_data_cursor *cursor,
size_t *page_offset,
size_t *length)
{
struct ceph_msg_data *data = cursor->data;
struct bio *bio;
struct bio_vec bio_vec;
struct bio_vec bv = bio_iter_iovec(cursor->bio_iter.bio,
cursor->bio_iter.iter);
BUG_ON(data->type != CEPH_MSG_DATA_BIO);
bio = cursor->bio;
BUG_ON(!bio);
bio_vec = bio_iter_iovec(bio, cursor->bvec_iter);
*page_offset = (size_t) bio_vec.bv_offset;
BUG_ON(*page_offset >= PAGE_SIZE);
if (cursor->last_piece) /* pagelist offset is always 0 */
*length = cursor->resid;
else
*length = (size_t) bio_vec.bv_len;
BUG_ON(*length > cursor->resid);
BUG_ON(*page_offset + *length > PAGE_SIZE);
return bio_vec.bv_page;
*page_offset = bv.bv_offset;
*length = bv.bv_len;
return bv.bv_page;
}
static bool ceph_msg_data_bio_advance(struct ceph_msg_data_cursor *cursor,
size_t bytes)
{
struct bio *bio;
struct bio_vec bio_vec;
struct ceph_bio_iter *it = &cursor->bio_iter;
BUG_ON(cursor->data->type != CEPH_MSG_DATA_BIO);
bio = cursor->bio;
BUG_ON(!bio);
bio_vec = bio_iter_iovec(bio, cursor->bvec_iter);
/* Advance the cursor offset */
BUG_ON(cursor->resid < bytes);
BUG_ON(bytes > cursor->resid);
BUG_ON(bytes > bio_iter_len(it->bio, it->iter));
cursor->resid -= bytes;
bio_advance_iter(it->bio, &it->iter, bytes);
bio_advance_iter(bio, &cursor->bvec_iter, bytes);
if (!cursor->resid) {
BUG_ON(!cursor->last_piece);
return false; /* no more data */
}
if (bytes < bio_vec.bv_len)
if (!bytes || (it->iter.bi_size && it->iter.bi_bvec_done))
return false; /* more bytes to process in this segment */
/* Move on to the next segment, and possibly the next bio */
if (!cursor->bvec_iter.bi_size) {
bio = bio->bi_next;
cursor->bio = bio;
if (bio)
cursor->bvec_iter = bio->bi_iter;
else
memset(&cursor->bvec_iter, 0,
sizeof(cursor->bvec_iter));
}
if (!cursor->last_piece) {
BUG_ON(!cursor->resid);
BUG_ON(!bio);
/* A short read is OK, so use <= rather than == */
if (cursor->resid <= bio_iter_len(bio, cursor->bvec_iter))
cursor->last_piece = true;
if (!it->iter.bi_size) {
it->bio = it->bio->bi_next;
it->iter = it->bio->bi_iter;
if (cursor->resid < it->iter.bi_size)
it->iter.bi_size = cursor->resid;
}
BUG_ON(cursor->last_piece);
BUG_ON(cursor->resid < bio_iter_len(it->bio, it->iter));
cursor->last_piece = cursor->resid == bio_iter_len(it->bio, it->iter);
return true;
}
#endif /* CONFIG_BLOCK */
static void ceph_msg_data_bvecs_cursor_init(struct ceph_msg_data_cursor *cursor,
size_t length)
{
struct ceph_msg_data *data = cursor->data;
struct bio_vec *bvecs = data->bvec_pos.bvecs;
cursor->resid = min_t(size_t, length, data->bvec_pos.iter.bi_size);
cursor->bvec_iter = data->bvec_pos.iter;
cursor->bvec_iter.bi_size = cursor->resid;
BUG_ON(cursor->resid < bvec_iter_len(bvecs, cursor->bvec_iter));
cursor->last_piece =
cursor->resid == bvec_iter_len(bvecs, cursor->bvec_iter);
}
static struct page *ceph_msg_data_bvecs_next(struct ceph_msg_data_cursor *cursor,
size_t *page_offset,
size_t *length)
{
struct bio_vec bv = bvec_iter_bvec(cursor->data->bvec_pos.bvecs,
cursor->bvec_iter);
*page_offset = bv.bv_offset;
*length = bv.bv_len;
return bv.bv_page;
}
static bool ceph_msg_data_bvecs_advance(struct ceph_msg_data_cursor *cursor,
size_t bytes)
{
struct bio_vec *bvecs = cursor->data->bvec_pos.bvecs;
BUG_ON(bytes > cursor->resid);
BUG_ON(bytes > bvec_iter_len(bvecs, cursor->bvec_iter));
cursor->resid -= bytes;
bvec_iter_advance(bvecs, &cursor->bvec_iter, bytes);
if (!cursor->resid) {
BUG_ON(!cursor->last_piece);
return false; /* no more data */
}
if (!bytes || cursor->bvec_iter.bi_bvec_done)
return false; /* more bytes to process in this segment */
BUG_ON(cursor->last_piece);
BUG_ON(cursor->resid < bvec_iter_len(bvecs, cursor->bvec_iter));
cursor->last_piece =
cursor->resid == bvec_iter_len(bvecs, cursor->bvec_iter);
return true;
}
/*
* For a page array, a piece comes from the first page in the array
* that has not already been fully consumed.
@ -1110,6 +1127,9 @@ static void __ceph_msg_data_cursor_init(struct ceph_msg_data_cursor *cursor)
ceph_msg_data_bio_cursor_init(cursor, length);
break;
#endif /* CONFIG_BLOCK */
case CEPH_MSG_DATA_BVECS:
ceph_msg_data_bvecs_cursor_init(cursor, length);
break;
case CEPH_MSG_DATA_NONE:
default:
/* BUG(); */
@ -1158,14 +1178,19 @@ static struct page *ceph_msg_data_next(struct ceph_msg_data_cursor *cursor,
page = ceph_msg_data_bio_next(cursor, page_offset, length);
break;
#endif /* CONFIG_BLOCK */
case CEPH_MSG_DATA_BVECS:
page = ceph_msg_data_bvecs_next(cursor, page_offset, length);
break;
case CEPH_MSG_DATA_NONE:
default:
page = NULL;
break;
}
BUG_ON(!page);
BUG_ON(*page_offset + *length > PAGE_SIZE);
BUG_ON(!*length);
BUG_ON(*length > cursor->resid);
if (last_piece)
*last_piece = cursor->last_piece;
@ -1194,6 +1219,9 @@ static void ceph_msg_data_advance(struct ceph_msg_data_cursor *cursor,
new_piece = ceph_msg_data_bio_advance(cursor, bytes);
break;
#endif /* CONFIG_BLOCK */
case CEPH_MSG_DATA_BVECS:
new_piece = ceph_msg_data_bvecs_advance(cursor, bytes);
break;
case CEPH_MSG_DATA_NONE:
default:
BUG();
@ -1575,13 +1603,18 @@ static int write_partial_message_data(struct ceph_connection *con)
* been revoked, so use the zero page.
*/
crc = do_datacrc ? le32_to_cpu(msg->footer.data_crc) : 0;
while (cursor->resid) {
while (cursor->total_resid) {
struct page *page;
size_t page_offset;
size_t length;
bool last_piece;
int ret;
if (!cursor->resid) {
ceph_msg_data_advance(cursor, 0);
continue;
}
page = ceph_msg_data_next(cursor, &page_offset, &length,
&last_piece);
ret = ceph_tcp_sendpage(con->sock, page, page_offset,
@ -2297,7 +2330,12 @@ static int read_partial_msg_data(struct ceph_connection *con)
if (do_datacrc)
crc = con->in_data_crc;
while (cursor->resid) {
while (cursor->total_resid) {
if (!cursor->resid) {
ceph_msg_data_advance(cursor, 0);
continue;
}
page = ceph_msg_data_next(cursor, &page_offset, &length, NULL);
ret = ceph_tcp_recvpage(con->sock, page, page_offset, length);
if (ret <= 0) {
@ -3262,16 +3300,14 @@ void ceph_msg_data_add_pagelist(struct ceph_msg *msg,
EXPORT_SYMBOL(ceph_msg_data_add_pagelist);
#ifdef CONFIG_BLOCK
void ceph_msg_data_add_bio(struct ceph_msg *msg, struct bio *bio,
size_t length)
void ceph_msg_data_add_bio(struct ceph_msg *msg, struct ceph_bio_iter *bio_pos,
u32 length)
{
struct ceph_msg_data *data;
BUG_ON(!bio);
data = ceph_msg_data_create(CEPH_MSG_DATA_BIO);
BUG_ON(!data);
data->bio = bio;
data->bio_pos = *bio_pos;
data->bio_length = length;
list_add_tail(&data->links, &msg->data);
@ -3280,6 +3316,20 @@ void ceph_msg_data_add_bio(struct ceph_msg *msg, struct bio *bio,
EXPORT_SYMBOL(ceph_msg_data_add_bio);
#endif /* CONFIG_BLOCK */
void ceph_msg_data_add_bvecs(struct ceph_msg *msg,
struct ceph_bvec_iter *bvec_pos)
{
struct ceph_msg_data *data;
data = ceph_msg_data_create(CEPH_MSG_DATA_BVECS);
BUG_ON(!data);
data->bvec_pos = *bvec_pos;
list_add_tail(&data->links, &msg->data);
msg->data_length += bvec_pos->iter.bi_size;
}
EXPORT_SYMBOL(ceph_msg_data_add_bvecs);
/*
* construct a new message with given type, size
* the new msg has a ref count of 1.

2
net/ceph/mon_client.c
View File

@ -60,7 +60,7 @@ struct ceph_monmap *ceph_monmap_decode(void *p, void *end)
num_mon = ceph_decode_32(&p);
ceph_decode_need(&p, end, num_mon*sizeof(m->mon_inst[0]), bad);
if (num_mon >= CEPH_MAX_MON)
if (num_mon > CEPH_MAX_MON)
goto bad;
m = kmalloc(sizeof(*m) + sizeof(m->mon_inst[0])*num_mon, GFP_NOFS);
if (m == NULL)

67
net/ceph/osd_client.c
View File

@ -20,6 +20,7 @@
#include <linux/ceph/decode.h>
#include <linux/ceph/auth.h>
#include <linux/ceph/pagelist.h>
#include <linux/ceph/striper.h>
#define OSD_OPREPLY_FRONT_LEN 512
@ -103,13 +104,12 @@ static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen,
u64 *objnum, u64 *objoff, u64 *objlen)
{
u64 orig_len = *plen;
int r;
u32 xlen;
/* object extent? */
r = ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
objoff, objlen);
if (r < 0)
return r;
ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
objoff, &xlen);
*objlen = xlen;
if (*objlen < orig_len) {
*plen = *objlen;
dout(" skipping last %llu, final file extent %llu~%llu\n",
@ -117,7 +117,6 @@ static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen,
}
dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen);
return 0;
}
@ -148,14 +147,22 @@ static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
#ifdef CONFIG_BLOCK
static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
struct bio *bio, size_t bio_length)
struct ceph_bio_iter *bio_pos,
u32 bio_length)
{
osd_data->type = CEPH_OSD_DATA_TYPE_BIO;
osd_data->bio = bio;
osd_data->bio_pos = *bio_pos;
osd_data->bio_length = bio_length;
}
#endif /* CONFIG_BLOCK */
static void ceph_osd_data_bvecs_init(struct ceph_osd_data *osd_data,
struct ceph_bvec_iter *bvec_pos)
{
osd_data->type = CEPH_OSD_DATA_TYPE_BVECS;
osd_data->bvec_pos = *bvec_pos;
}
#define osd_req_op_data(oreq, whch, typ, fld) \
({ \
struct ceph_osd_request *__oreq = (oreq); \
@ -218,16 +225,29 @@ EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist);
#ifdef CONFIG_BLOCK
void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req,
unsigned int which, struct bio *bio, size_t bio_length)
unsigned int which,
struct ceph_bio_iter *bio_pos,
u32 bio_length)
{
struct ceph_osd_data *osd_data;
osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
ceph_osd_data_bio_init(osd_data, bio, bio_length);
ceph_osd_data_bio_init(osd_data, bio_pos, bio_length);
}
EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
#endif /* CONFIG_BLOCK */
void osd_req_op_extent_osd_data_bvec_pos(struct ceph_osd_request *osd_req,
unsigned int which,
struct ceph_bvec_iter *bvec_pos)
{
struct ceph_osd_data *osd_data;
osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
ceph_osd_data_bvecs_init(osd_data, bvec_pos);
}
EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvec_pos);
static void osd_req_op_cls_request_info_pagelist(
struct ceph_osd_request *osd_req,
unsigned int which, struct ceph_pagelist *pagelist)
@ -265,6 +285,23 @@ void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req,
}
EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);
void osd_req_op_cls_request_data_bvecs(struct ceph_osd_request *osd_req,
unsigned int which,
struct bio_vec *bvecs, u32 bytes)
{
struct ceph_osd_data *osd_data;
struct ceph_bvec_iter it = {
.bvecs = bvecs,
.iter = { .bi_size = bytes },
};
osd_data = osd_req_op_data(osd_req, which, cls, request_data);
ceph_osd_data_bvecs_init(osd_data, &it);
osd_req->r_ops[which].cls.indata_len += bytes;
osd_req->r_ops[which].indata_len += bytes;
}
EXPORT_SYMBOL(osd_req_op_cls_request_data_bvecs);
void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req,
unsigned int which, struct page **pages, u64 length,
u32 alignment, bool pages_from_pool, bool own_pages)
@ -290,6 +327,8 @@ static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data)
case CEPH_OSD_DATA_TYPE_BIO:
return (u64)osd_data->bio_length;
#endif /* CONFIG_BLOCK */
case CEPH_OSD_DATA_TYPE_BVECS:
return osd_data->bvec_pos.iter.bi_size;
default:
WARN(true, "unrecognized data type %d\n", (int)osd_data->type);
return 0;
@ -828,8 +867,10 @@ static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
#ifdef CONFIG_BLOCK
} else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
ceph_msg_data_add_bio(msg, osd_data->bio, length);
ceph_msg_data_add_bio(msg, &osd_data->bio_pos, length);
#endif
} else if (osd_data->type == CEPH_OSD_DATA_TYPE_BVECS) {
ceph_msg_data_add_bvecs(msg, &osd_data->bvec_pos);
} else {
BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
}
@ -5065,7 +5106,7 @@ int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
}
EXPORT_SYMBOL(ceph_osdc_writepages);
int ceph_osdc_setup(void)
int __init ceph_osdc_setup(void)
{
size_t size = sizeof(struct ceph_osd_request) +
CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op);
@ -5076,7 +5117,6 @@ int ceph_osdc_setup(void)
return ceph_osd_request_cache ? 0 : -ENOMEM;
}
EXPORT_SYMBOL(ceph_osdc_setup);
void ceph_osdc_cleanup(void)
{
@ -5084,7 +5124,6 @@ void ceph_osdc_cleanup(void)
kmem_cache_destroy(ceph_osd_request_cache);
ceph_osd_request_cache = NULL;
}
EXPORT_SYMBOL(ceph_osdc_cleanup);
/*
* handle incoming message

71
net/ceph/osdmap.c
View File

@ -4,7 +4,6 @@
#include <linux/module.h>
#include <linux/slab.h>
#include <asm/div64.h>
#include <linux/ceph/libceph.h>
#include <linux/ceph/osdmap.h>
@ -2140,76 +2139,6 @@ bool ceph_osds_changed(const struct ceph_osds *old_acting,
return false;
}
/*
* calculate file layout from given offset, length.
* fill in correct oid, logical length, and object extent
* offset, length.
*
* for now, we write only a single su, until we can
* pass a stride back to the caller.
*/
int ceph_calc_file_object_mapping(struct ceph_file_layout *layout,
u64 off, u64 len,
u64 *ono,
u64 *oxoff, u64 *oxlen)
{
u32 osize = layout->object_size;
u32 su = layout->stripe_unit;
u32 sc = layout->stripe_count;
u32 bl, stripeno, stripepos, objsetno;
u32 su_per_object;
u64 t, su_offset;
dout("mapping %llu~%llu osize %u fl_su %u\n", off, len,
osize, su);
if (su == 0 || sc == 0)
goto invalid;
su_per_object = osize / su;
if (su_per_object == 0)
goto invalid;
dout("osize %u / su %u = su_per_object %u\n", osize, su,
su_per_object);
if ((su & ~PAGE_MASK) != 0)
goto invalid;
/* bl = *off / su; */
t = off;
do_div(t, su);
bl = t;
dout("off %llu / su %u = bl %u\n", off, su, bl);
stripeno = bl / sc;
stripepos = bl % sc;
objsetno = stripeno / su_per_object;
*ono = objsetno * sc + stripepos;
dout("objset %u * sc %u = ono %u\n", objsetno, sc, (unsigned int)*ono);
/* *oxoff = *off % layout->fl_stripe_unit; # offset in su */
t = off;
su_offset = do_div(t, su);
*oxoff = su_offset + (stripeno % su_per_object) * su;
/*
* Calculate the length of the extent being written to the selected
* object. This is the minimum of the full length requested (len) or
* the remainder of the current stripe being written to.
*/
*oxlen = min_t(u64, len, su - su_offset);
dout(" obj extent %llu~%llu\n", *oxoff, *oxlen);
return 0;
invalid:
dout(" invalid layout\n");
*ono = 0;
*oxoff = 0;
*oxlen = 0;
return -EINVAL;
}
EXPORT_SYMBOL(ceph_calc_file_object_mapping);
/*
* Map an object into a PG.
*

261
net/ceph/striper.c Normal file
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@ -0,0 +1,261 @@
/* SPDX-License-Identifier: GPL-2.0 */
#include <linux/ceph/ceph_debug.h>
#include <linux/math64.h>
#include <linux/slab.h>
#include <linux/ceph/striper.h>
#include <linux/ceph/types.h>
/*
* Map a file extent to a stripe unit within an object.
* Fill in objno, offset into object, and object extent length (i.e. the
* number of bytes mapped, less than or equal to @l->stripe_unit).
*
* Example for stripe_count = 3, stripes_per_object = 4:
*
* blockno | 0 3 6 9 | 1 4 7 10 | 2 5 8 11 | 12 15 18 21 | 13 16 19
* stripeno | 0 1 2 3 | 0 1 2 3 | 0 1 2 3 | 4 5 6 7 | 4 5 6
* stripepos | 0 | 1 | 2 | 0 | 1
* objno | 0 | 1 | 2 | 3 | 4
* objsetno | 0 | 1
*/
void ceph_calc_file_object_mapping(struct ceph_file_layout *l,
u64 off, u64 len,
u64 *objno, u64 *objoff, u32 *xlen)
{
u32 stripes_per_object = l->object_size / l->stripe_unit;
u64 blockno; /* which su in the file (i.e. globally) */
u32 blockoff; /* offset into su */
u64 stripeno; /* which stripe */
u32 stripepos; /* which su in the stripe,
which object in the object set */
u64 objsetno; /* which object set */
u32 objsetpos; /* which stripe in the object set */
blockno = div_u64_rem(off, l->stripe_unit, &blockoff);
stripeno = div_u64_rem(blockno, l->stripe_count, &stripepos);
objsetno = div_u64_rem(stripeno, stripes_per_object, &objsetpos);
*objno = objsetno * l->stripe_count + stripepos;
*objoff = objsetpos * l->stripe_unit + blockoff;
*xlen = min_t(u64, len, l->stripe_unit - blockoff);
}
EXPORT_SYMBOL(ceph_calc_file_object_mapping);
/*
* Return the last extent with given objno (@object_extents is sorted
* by objno). If not found, return NULL and set @add_pos so that the
* new extent can be added with list_add(add_pos, new_ex).
*/
static struct ceph_object_extent *
lookup_last(struct list_head *object_extents, u64 objno,
struct list_head **add_pos)
{
struct list_head *pos;
list_for_each_prev(pos, object_extents) {
struct ceph_object_extent *ex =
list_entry(pos, typeof(*ex), oe_item);
if (ex->oe_objno == objno)
return ex;
if (ex->oe_objno < objno)
break;
}
*add_pos = pos;
return NULL;
}
static struct ceph_object_extent *
lookup_containing(struct list_head *object_extents, u64 objno,
u64 objoff, u32 xlen)
{
struct ceph_object_extent *ex;
list_for_each_entry(ex, object_extents, oe_item) {
if (ex->oe_objno == objno &&
ex->oe_off <= objoff &&
ex->oe_off + ex->oe_len >= objoff + xlen) /* paranoia */
return ex;
if (ex->oe_objno > objno)
break;
}
return NULL;
}
/*
* Map a file extent to a sorted list of object extents.
*
* We want only one (or as few as possible) object extents per object.
* Adjacent object extents will be merged together, each returned object
* extent may reverse map to multiple different file extents.
*
* Call @alloc_fn for each new object extent and @action_fn for each
* mapped stripe unit, whether it was merged into an already allocated
* object extent or started a new object extent.
*
* Newly allocated object extents are added to @object_extents.
* To keep @object_extents sorted, successive calls to this function
* must map successive file extents (i.e. the list of file extents that
* are mapped using the same @object_extents must be sorted).
*
* The caller is responsible for @object_extents.
*/
int ceph_file_to_extents(struct ceph_file_layout *l, u64 off, u64 len,
struct list_head *object_extents,
struct ceph_object_extent *alloc_fn(void *arg),
void *alloc_arg,
ceph_object_extent_fn_t action_fn,
void *action_arg)
{
struct ceph_object_extent *last_ex, *ex;
while (len) {
struct list_head *add_pos = NULL;
u64 objno, objoff;
u32 xlen;
ceph_calc_file_object_mapping(l, off, len, &objno, &objoff,
&xlen);
last_ex = lookup_last(object_extents, objno, &add_pos);
if (!last_ex || last_ex->oe_off + last_ex->oe_len != objoff) {
ex = alloc_fn(alloc_arg);
if (!ex)
return -ENOMEM;
ex->oe_objno = objno;
ex->oe_off = objoff;
ex->oe_len = xlen;
if (action_fn)
action_fn(ex, xlen, action_arg);
if (!last_ex)
list_add(&ex->oe_item, add_pos);
else
list_add(&ex->oe_item, &last_ex->oe_item);
} else {
last_ex->oe_len += xlen;
if (action_fn)
action_fn(last_ex, xlen, action_arg);
}
off += xlen;
len -= xlen;
}
for (last_ex = list_first_entry(object_extents, typeof(*ex), oe_item),
ex = list_next_entry(last_ex, oe_item);
&ex->oe_item != object_extents;
last_ex = ex, ex = list_next_entry(ex, oe_item)) {
if (last_ex->oe_objno > ex->oe_objno ||
(last_ex->oe_objno == ex->oe_objno &&
last_ex->oe_off + last_ex->oe_len >= ex->oe_off)) {
WARN(1, "%s: object_extents list not sorted!\n",
__func__);
return -EINVAL;
}
}
return 0;
}
EXPORT_SYMBOL(ceph_file_to_extents);
/*
* A stripped down, non-allocating version of ceph_file_to_extents(),
* for when @object_extents is already populated.
*/
int ceph_iterate_extents(struct ceph_file_layout *l, u64 off, u64 len,
struct list_head *object_extents,
ceph_object_extent_fn_t action_fn,
void *action_arg)
{
while (len) {
struct ceph_object_extent *ex;
u64 objno, objoff;
u32 xlen;
ceph_calc_file_object_mapping(l, off, len, &objno, &objoff,
&xlen);
ex = lookup_containing(object_extents, objno, objoff, xlen);
if (!ex) {
WARN(1, "%s: objno %llu %llu~%u not found!\n",
__func__, objno, objoff, xlen);
return -EINVAL;
}
action_fn(ex, xlen, action_arg);
off += xlen;
len -= xlen;
}
return 0;
}
EXPORT_SYMBOL(ceph_iterate_extents);
/*
* Reverse map an object extent to a sorted list of file extents.
*
* On success, the caller is responsible for:
*
* kfree(file_extents)
*/
int ceph_extent_to_file(struct ceph_file_layout *l,
u64 objno, u64 objoff, u64 objlen,
struct ceph_file_extent **file_extents,
u32 *num_file_extents)
{
u32 stripes_per_object = l->object_size / l->stripe_unit;
u64 blockno; /* which su */
u32 blockoff; /* offset into su */
u64 stripeno; /* which stripe */
u32 stripepos; /* which su in the stripe,
which object in the object set */
u64 objsetno; /* which object set */
u32 i = 0;
if (!objlen) {
*file_extents = NULL;
*num_file_extents = 0;
return 0;
}
*num_file_extents = DIV_ROUND_UP_ULL(objoff + objlen, l->stripe_unit) -
DIV_ROUND_DOWN_ULL(objoff, l->stripe_unit);
*file_extents = kmalloc_array(*num_file_extents, sizeof(**file_extents),
GFP_NOIO);
if (!*file_extents)
return -ENOMEM;
div_u64_rem(objoff, l->stripe_unit, &blockoff);
while (objlen) {
u64 off, len;
objsetno = div_u64_rem(objno, l->stripe_count, &stripepos);
stripeno = div_u64(objoff, l->stripe_unit) +
objsetno * stripes_per_object;
blockno = stripeno * l->stripe_count + stripepos;
off = blockno * l->stripe_unit + blockoff;
len = min_t(u64, objlen, l->stripe_unit - blockoff);
(*file_extents)[i].fe_off = off;
(*file_extents)[i].fe_len = len;
blockoff = 0;
objoff += len;
objlen -= len;
i++;
}
BUG_ON(i != *num_file_extents);
return 0;
}
EXPORT_SYMBOL(ceph_extent_to_file);