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A one-liner that leads to a startling (but also very much rational)

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performance improvement in cases where an IMA policy with rules that
 are based on fsmagic matching is enforced, an encryption-related fixup
 that addresses generic/397 and other fstest failures and a couple of
 cleanups in CephFS.
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Merge tag 'ceph-for-6.16-rc1' of https://github.com/ceph/ceph-client

Pull ceph updates from Ilya Dryomov:

 - a one-liner that leads to a startling (but also very much rational)
   performance improvement in cases where an IMA policy with rules that
   are based on fsmagic matching is enforced

 - an encryption-related fixup that addresses generic/397 and other
   fstest failures

 - a couple of cleanups in CephFS

* tag 'ceph-for-6.16-rc1' of https://github.com/ceph/ceph-client:
  ceph: fix variable dereferenced before check in ceph_umount_begin()
  ceph: set superblock s_magic for IMA fsmagic matching
  ceph: cleanup hardcoded constants of file handle size
  ceph: fix possible integer overflow in ceph_zero_objects()
  ceph: avoid kernel BUG for encrypted inode with unaligned file size
This commit is contained in:
Linus Torvalds 2025-06-06 17:56:19 -07:00
commit a3fb8a61e4
4 changed files with 25 additions and 11 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

9
fs/ceph/addr.c
View file

@ -409,6 +409,15 @@ static void ceph_netfs_issue_read(struct netfs_io_subrequest *subreq)
struct page **pages;
size_t page_off;
/*
* FIXME: io_iter.count needs to be corrected to aligned
* length. Otherwise, iov_iter_get_pages_alloc2() operates
* with the initial unaligned length value. As a result,
* ceph_msg_data_cursor_init() triggers BUG_ON() in the case
* if msg->sparse_read_total > msg->data_length.
*/
subreq->io_iter.count = len;
err = iov_iter_get_pages_alloc2(&subreq->io_iter, &pages, len, &page_off);
if (err < 0) {
doutc(cl, "%llx.%llx failed to allocate pages, %d\n",

21
fs/ceph/export.c
View file

@ -33,12 +33,19 @@ struct ceph_nfs_snapfh {
u32 hash;
} __attribute__ ((packed));
#define BYTES_PER_U32 (sizeof(u32))
#define CEPH_FH_BASIC_SIZE \
(sizeof(struct ceph_nfs_fh) / BYTES_PER_U32)
#define CEPH_FH_WITH_PARENT_SIZE \
(sizeof(struct ceph_nfs_confh) / BYTES_PER_U32)
#define CEPH_FH_SNAPPED_INODE_SIZE \
(sizeof(struct ceph_nfs_snapfh) / BYTES_PER_U32)
static int ceph_encode_snapfh(struct inode *inode, u32 *rawfh, int *max_len,
struct inode *parent_inode)
{
struct ceph_client *cl = ceph_inode_to_client(inode);
static const int snap_handle_length =
sizeof(struct ceph_nfs_snapfh) >> 2;
static const int snap_handle_length = CEPH_FH_SNAPPED_INODE_SIZE;
struct ceph_nfs_snapfh *sfh = (void *)rawfh;
u64 snapid = ceph_snap(inode);
int ret;
@ -88,10 +95,8 @@ static int ceph_encode_fh(struct inode *inode, u32 *rawfh, int *max_len,
struct inode *parent_inode)
{
struct ceph_client *cl = ceph_inode_to_client(inode);
static const int handle_length =
sizeof(struct ceph_nfs_fh) >> 2;
static const int connected_handle_length =
sizeof(struct ceph_nfs_confh) >> 2;
static const int handle_length = CEPH_FH_BASIC_SIZE;
static const int connected_handle_length = CEPH_FH_WITH_PARENT_SIZE;
int type;
if (ceph_snap(inode) != CEPH_NOSNAP)
@ -308,7 +313,7 @@ static struct dentry *ceph_fh_to_dentry(struct super_block *sb,
if (fh_type != FILEID_INO32_GEN &&
fh_type != FILEID_INO32_GEN_PARENT)
return NULL;
if (fh_len < sizeof(*fh) / 4)
if (fh_len < sizeof(*fh) / BYTES_PER_U32)
return NULL;
doutc(fsc->client, "%llx\n", fh->ino);
@ -427,7 +432,7 @@ static struct dentry *ceph_fh_to_parent(struct super_block *sb,
if (fh_type != FILEID_INO32_GEN_PARENT)
return NULL;
if (fh_len < sizeof(*cfh) / 4)
if (fh_len < sizeof(*cfh) / BYTES_PER_U32)
return NULL;
doutc(fsc->client, "%llx\n", cfh->parent_ino);

2
fs/ceph/file.c
View file

@ -2616,7 +2616,7 @@ static int ceph_zero_objects(struct inode *inode, loff_t offset, loff_t length)
s32 stripe_unit = ci->i_layout.stripe_unit;
s32 stripe_count = ci->i_layout.stripe_count;
s32 object_size = ci->i_layout.object_size;
u64 object_set_size = object_size * stripe_count;
u64 object_set_size = (u64) object_size * stripe_count;
u64 nearly, t;
/* round offset up to next period boundary */

4
fs/ceph/super.c
View file

@ -1033,8 +1033,7 @@ void ceph_umount_begin(struct super_block *sb)
struct ceph_fs_client *fsc = ceph_sb_to_fs_client(sb);
doutc(fsc->client, "starting forced umount\n");
if (!fsc)
return;
fsc->mount_state = CEPH_MOUNT_SHUTDOWN;
__ceph_umount_begin(fsc);
}
@ -1227,6 +1226,7 @@ static int ceph_set_super(struct super_block *s, struct fs_context *fc)
s->s_time_min = 0;
s->s_time_max = U32_MAX;
s->s_flags |= SB_NODIRATIME | SB_NOATIME;
s->s_magic = CEPH_SUPER_MAGIC;
ceph_fscrypt_set_ops(s);