diff options
author | Yan, Zheng <zyan@redhat.com> | 2017-11-27 10:47:46 +0800 |
---|---|---|
committer | Ilya Dryomov <idryomov@gmail.com> | 2018-01-29 18:36:07 +0100 |
commit | 97aeb6bf988e0830fd80dca724fd89526b3f35e4 (patch) | |
tree | 8c5b049cc7c3572a1cf288958a9ca44af36523c5 /fs | |
parent | 8d8f371c83838d74bc3d0708afba631488a12201 (diff) | |
download | op-kernel-dev-97aeb6bf988e0830fd80dca724fd89526b3f35e4.zip op-kernel-dev-97aeb6bf988e0830fd80dca724fd89526b3f35e4.tar.gz |
ceph: use atomic_t for ceph_inode_info::i_shared_gen
It allows accessing i_shared_gen without holding i_ceph_lock. It is
preparation for later patch.
Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs')
-rw-r--r-- | fs/ceph/caps.c | 2 | ||||
-rw-r--r-- | fs/ceph/dir.c | 14 | ||||
-rw-r--r-- | fs/ceph/inode.c | 4 | ||||
-rw-r--r-- | fs/ceph/super.h | 5 |
4 files changed, 13 insertions, 12 deletions
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c index 029cab7..57120e3 100644 --- a/fs/ceph/caps.c +++ b/fs/ceph/caps.c @@ -498,7 +498,7 @@ static void __check_cap_issue(struct ceph_inode_info *ci, struct ceph_cap *cap, */ if ((issued & CEPH_CAP_FILE_SHARED) != (had & CEPH_CAP_FILE_SHARED)) { if (issued & CEPH_CAP_FILE_SHARED) - ci->i_shared_gen++; + atomic_inc(&ci->i_shared_gen); if (S_ISDIR(ci->vfs_inode.i_mode)) { dout(" marking %p NOT complete\n", &ci->vfs_inode); __ceph_dir_clear_complete(ci); diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c index 64afa46..d671d58 100644 --- a/fs/ceph/dir.c +++ b/fs/ceph/dir.c @@ -173,7 +173,7 @@ __dcache_find_get_entry(struct dentry *parent, u64 idx, * the MDS if/when the directory is modified). */ static int __dcache_readdir(struct file *file, struct dir_context *ctx, - u32 shared_gen) + int shared_gen) { struct ceph_file_info *fi = file->private_data; struct dentry *parent = file->f_path.dentry; @@ -184,7 +184,7 @@ static int __dcache_readdir(struct file *file, struct dir_context *ctx, u64 idx = 0; int err = 0; - dout("__dcache_readdir %p v%u at %llx\n", dir, shared_gen, ctx->pos); + dout("__dcache_readdir %p v%u at %llx\n", dir, (unsigned)shared_gen, ctx->pos); /* search start position */ if (ctx->pos > 2) { @@ -333,7 +333,7 @@ static int ceph_readdir(struct file *file, struct dir_context *ctx) ceph_snap(inode) != CEPH_SNAPDIR && __ceph_dir_is_complete_ordered(ci) && __ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1)) { - u32 shared_gen = ci->i_shared_gen; + int shared_gen = atomic_read(&ci->i_shared_gen); spin_unlock(&ci->i_ceph_lock); err = __dcache_readdir(file, ctx, shared_gen); if (err != -EAGAIN) @@ -751,7 +751,7 @@ static struct dentry *ceph_lookup(struct inode *dir, struct dentry *dentry, spin_unlock(&ci->i_ceph_lock); dout(" dir %p complete, -ENOENT\n", dir); d_add(dentry, NULL); - di->lease_shared_gen = ci->i_shared_gen; + di->lease_shared_gen = atomic_read(&ci->i_shared_gen); return NULL; } spin_unlock(&ci->i_ceph_lock); @@ -1191,12 +1191,12 @@ static int dir_lease_is_valid(struct inode *dir, struct dentry *dentry) int valid = 0; spin_lock(&ci->i_ceph_lock); - if (ci->i_shared_gen == di->lease_shared_gen) + if (atomic_read(&ci->i_shared_gen) == di->lease_shared_gen) valid = __ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1); spin_unlock(&ci->i_ceph_lock); dout("dir_lease_is_valid dir %p v%u dentry %p v%u = %d\n", - dir, (unsigned)ci->i_shared_gen, dentry, - (unsigned)di->lease_shared_gen, valid); + dir, (unsigned)atomic_read(&ci->i_shared_gen), + dentry, (unsigned)di->lease_shared_gen, valid); return valid; } diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index 666ad10..6d02528 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -494,7 +494,7 @@ struct inode *ceph_alloc_inode(struct super_block *sb) ci->i_wrbuffer_ref = 0; ci->i_wrbuffer_ref_head = 0; atomic_set(&ci->i_filelock_ref, 0); - ci->i_shared_gen = 0; + atomic_set(&ci->i_shared_gen, 0); ci->i_rdcache_gen = 0; ci->i_rdcache_revoking = 0; @@ -1041,7 +1041,7 @@ static void update_dentry_lease(struct dentry *dentry, if (ceph_snap(dir) != CEPH_NOSNAP) goto out_unlock; - di->lease_shared_gen = ceph_inode(dir)->i_shared_gen; + di->lease_shared_gen = atomic_read(&ceph_inode(dir)->i_shared_gen); if (duration == 0) goto out_unlock; diff --git a/fs/ceph/super.h b/fs/ceph/super.h index 2beeec0..75701c1 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -256,7 +256,8 @@ struct ceph_inode_xattr { */ struct ceph_dentry_info { struct ceph_mds_session *lease_session; - u32 lease_gen, lease_shared_gen; + int lease_shared_gen; + u32 lease_gen; u32 lease_seq; unsigned long lease_renew_after, lease_renew_from; struct list_head lru; @@ -353,7 +354,7 @@ struct ceph_inode_info { int i_rd_ref, i_rdcache_ref, i_wr_ref, i_wb_ref; int i_wrbuffer_ref, i_wrbuffer_ref_head; atomic_t i_filelock_ref; - u32 i_shared_gen; /* increment each time we get FILE_SHARED */ + atomic_t i_shared_gen; /* increment each time we get FILE_SHARED */ u32 i_rdcache_gen; /* incremented each time we get FILE_CACHE. */ u32 i_rdcache_revoking; /* RDCACHE gen to async invalidate, if any */ |