We used to use a flag on the directory inode to track whether the dcache contents for a directory were a complete cached copy. Switch to a dentry flag CEPH_D_COMPLETE that is safely updated by ->d_prune().
Signed-off-by: Sage Weil <[email protected]> --- fs/ceph/caps.c | 8 ++---- fs/ceph/dir.c | 59 ++++++++++++++++++++++++++++++++++++++++++------- fs/ceph/inode.c | 9 +++---- fs/ceph/mds_client.c | 6 ++-- fs/ceph/super.h | 10 ++++++- 5 files changed, 68 insertions(+), 24 deletions(-) diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c index 6b61ded..77ae202 100644 --- a/fs/ceph/caps.c +++ b/fs/ceph/caps.c @@ -487,17 +487,15 @@ static void __check_cap_issue(struct ceph_inode_info *ci, struct ceph_cap *cap, ci->i_rdcache_gen++; /* - * if we are newly issued FILE_SHARED, clear I_COMPLETE; we + * if we are newly issued FILE_SHARED, clear D_COMPLETE; we * don't know what happened to this directory while we didn't * have the cap. */ if ((issued & CEPH_CAP_FILE_SHARED) && (had & CEPH_CAP_FILE_SHARED) == 0) { ci->i_shared_gen++; - if (S_ISDIR(ci->vfs_inode.i_mode)) { - dout(" marking %p NOT complete\n", &ci->vfs_inode); - ci->i_ceph_flags &= ~CEPH_I_COMPLETE; - } + if (S_ISDIR(ci->vfs_inode.i_mode)) + ceph_dir_clear_complete(&ci->vfs_inode); } } diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c index 2072f62..7dd6877 100644 --- a/fs/ceph/dir.c +++ b/fs/ceph/dir.c @@ -90,7 +90,7 @@ static unsigned fpos_off(loff_t p) * falling back to a "normal" sync readdir if any dentries in the dir * are dropped. * - * I_COMPLETE tells indicates we have all dentries in the dir. It is + * D_COMPLETE tells indicates we have all dentries in the dir. It is * defined IFF we hold CEPH_CAP_FILE_SHARED (which will be revoked by * the MDS if/when the directory is modified). */ @@ -181,8 +181,8 @@ more: filp->f_pos++; /* make sure a dentry wasn't dropped while we didn't have parent lock */ - if (!ceph_i_test(dir, CEPH_I_COMPLETE)) { - dout(" lost I_COMPLETE on %p; falling back to mds\n", dir); + if (!ceph_dir_test_complete(dir)) { + dout(" lost D_COMPLETE on %p; falling back to mds\n", dir); err = -EAGAIN; goto out; } @@ -267,7 +267,7 @@ static int ceph_readdir(struct file *filp, void *dirent, filldir_t filldir) if ((filp->f_pos == 2 || fi->dentry) && !ceph_test_mount_opt(fsc, NOASYNCREADDIR) && ceph_snap(inode) != CEPH_SNAPDIR && - (ci->i_ceph_flags & CEPH_I_COMPLETE) && + ceph_dir_test_complete(inode) && __ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1)) { spin_unlock(&inode->i_lock); err = __dcache_readdir(filp, dirent, filldir); @@ -332,7 +332,7 @@ more: if (!req->r_did_prepopulate) { dout("readdir !did_prepopulate"); - fi->dir_release_count--; /* preclude I_COMPLETE */ + fi->dir_release_count--; /* preclude D_COMPLETE */ } /* note next offset and last dentry name */ @@ -411,8 +411,7 @@ more: */ spin_lock(&inode->i_lock); if (ci->i_release_count == fi->dir_release_count) { - dout(" marking %p complete\n", inode); - /* ci->i_ceph_flags |= CEPH_I_COMPLETE; */ + ceph_dir_set_complete(inode); ci->i_max_offset = filp->f_pos; } spin_unlock(&inode->i_lock); @@ -582,7 +581,7 @@ static struct dentry *ceph_lookup(struct inode *dir, struct dentry *dentry, fsc->mount_options->snapdir_name, dentry->d_name.len) && !is_root_ceph_dentry(dir, dentry) && - (ci->i_ceph_flags & CEPH_I_COMPLETE) && + ceph_dir_test_complete(dir) && (__ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1))) { spin_unlock(&dir->i_lock); dout(" dir %p complete, -ENOENT\n", dir); @@ -906,7 +905,7 @@ static int ceph_rename(struct inode *old_dir, struct dentry *old_dentry, */ /* d_move screws up d_subdirs order */ - ceph_i_clear(new_dir, CEPH_I_COMPLETE); + ceph_dir_clear_complete(new_dir); d_move(old_dentry, new_dentry); @@ -1067,6 +1066,48 @@ static int ceph_snapdir_d_revalidate(struct dentry *dentry, } /* + * Set/clear/test dir complete flag on the dir's dentry. + */ +static struct dentry * __d_find_any_alias(struct inode *inode) +{ + struct dentry *alias; + + if (list_empty(&inode->i_dentry)) + return NULL; + alias = list_first_entry(&inode->i_dentry, struct dentry, d_alias); + return alias; +} + +void ceph_dir_set_complete(struct inode *inode) +{ + struct dentry *dentry = __d_find_any_alias(inode); + + if (dentry && ceph_dentry(dentry)) { + dout(" marking %p (%p) complete\n", inode, dentry); + set_bit(CEPH_D_COMPLETE, &ceph_dentry(dentry)->flags); + } +} + +void ceph_dir_clear_complete(struct inode *inode) +{ + struct dentry *dentry = __d_find_any_alias(inode); + + if (dentry && ceph_dentry(dentry)) { + dout(" marking %p (%p) NOT complete\n", inode, dentry); + set_bit(CEPH_D_COMPLETE, &ceph_dentry(dentry)->flags); + } +} + +bool ceph_dir_test_complete(struct inode *inode) +{ + struct dentry *dentry = __d_find_any_alias(inode); + + if (dentry && ceph_dentry(dentry)) + return test_bit(CEPH_D_COMPLETE, &ceph_dentry(dentry)->flags); + return false; +} + +/* * When the VFS prunes a dentry from the cache, we need to clear the * complete flag on the parent directory. * diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index b54c97d..dc5829a 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -712,9 +712,8 @@ static int fill_inode(struct inode *inode, ceph_snap(inode) == CEPH_NOSNAP && (le32_to_cpu(info->cap.caps) & CEPH_CAP_FILE_SHARED) && (issued & CEPH_CAP_FILE_EXCL) == 0 && - (ci->i_ceph_flags & CEPH_I_COMPLETE) == 0) { - dout(" marking %p complete (empty)\n", inode); - /* ci->i_ceph_flags |= CEPH_I_COMPLETE; */ + !ceph_dir_test_complete(inode) == 0) { + ceph_dir_set_complete(inode); ci->i_max_offset = 2; } break; @@ -850,7 +849,7 @@ static void ceph_set_dentry_offset(struct dentry *dn) di = ceph_dentry(dn); spin_lock(&inode->i_lock); - if ((ceph_inode(inode)->i_ceph_flags & CEPH_I_COMPLETE) == 0) { + if (!ceph_dir_test_complete(inode)) { spin_unlock(&inode->i_lock); return; } @@ -1052,7 +1051,7 @@ int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req, * d_move() puts the renamed dentry at the end of * d_subdirs. We need to assign it an appropriate * directory offset so we can behave when holding - * I_COMPLETE. + * D_COMPLETE. */ ceph_set_dentry_offset(req->r_old_dentry); dout("dn %p gets new offset %lld\n", req->r_old_dentry, diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index a1ee8fa..22673b9 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -1974,7 +1974,7 @@ out: } /* - * Invalidate dir I_COMPLETE, dentry lease state on an aborted MDS + * Invalidate dir D_COMPLETE, dentry lease state on an aborted MDS * namespace request. */ void ceph_invalidate_dir_request(struct ceph_mds_request *req) @@ -1982,9 +1982,9 @@ void ceph_invalidate_dir_request(struct ceph_mds_request *req) struct inode *inode = req->r_locked_dir; struct ceph_inode_info *ci = ceph_inode(inode); - dout("invalidate_dir_request %p (I_COMPLETE, lease(s))\n", inode); + dout("invalidate_dir_request %p (D_COMPLETE, lease(s))\n", inode); spin_lock(&inode->i_lock); - ci->i_ceph_flags &= ~CEPH_I_COMPLETE; + ceph_dir_clear_complete(inode); ci->i_release_count++; spin_unlock(&inode->i_lock); diff --git a/fs/ceph/super.h b/fs/ceph/super.h index b6bf098..6bcf0f5 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -262,7 +262,7 @@ struct ceph_inode_info { struct timespec i_rctime; u64 i_rbytes, i_rfiles, i_rsubdirs; u64 i_files, i_subdirs; - u64 i_max_offset; /* largest readdir offset, set with I_COMPLETE */ + u64 i_max_offset; /* largest readdir offset, set with D_COMPLETE */ struct rb_root i_fragtree; struct mutex i_fragtree_mutex; @@ -426,7 +426,6 @@ static inline struct inode *ceph_find_inode(struct super_block *sb, /* * Ceph inode. */ -#define CEPH_I_COMPLETE 1 /* we have complete directory cached */ #define CEPH_I_NODELAY 4 /* do not delay cap release */ #define CEPH_I_FLUSH 8 /* do not delay flush of dirty metadata */ #define CEPH_I_NOFLUSH 16 /* do not flush dirty caps */ @@ -484,6 +483,13 @@ static inline loff_t ceph_make_fpos(unsigned frag, unsigned off) } /* + * set/clear directory D_COMPLETE flag + */ +void ceph_dir_set_complete(struct inode *inode); +void ceph_dir_clear_complete(struct inode *inode); +bool ceph_dir_test_complete(struct inode *inode); + +/* * caps helpers */ static inline bool __ceph_is_any_real_caps(struct ceph_inode_info *ci) -- 1.7.0 -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
