From 48fde701aff662559b38d9a609574068f22d00fe Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sun, 8 Jan 2012 22:15:13 -0500 Subject: switch open-coded instances of d_make_root() to new helper Signed-off-by: Al Viro --- fs/ceph/super.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'fs/ceph') diff --git a/fs/ceph/super.c b/fs/ceph/super.c index 00de2c9568cd..256f85221926 100644 --- a/fs/ceph/super.c +++ b/fs/ceph/super.c @@ -655,9 +655,8 @@ static struct dentry *open_root_dentry(struct ceph_fs_client *fsc, dout("open_root_inode success\n"); if (ceph_ino(inode) == CEPH_INO_ROOT && fsc->sb->s_root == NULL) { - root = d_alloc_root(inode); + root = d_make_root(inode); if (!root) { - iput(inode); root = ERR_PTR(-ENOMEM); goto out; } -- cgit v1.2.1 From b0b0382bb4904965a9e9fca77ad87514dfda0d1c Mon Sep 17 00:00:00 2001 From: Al Viro Date: Mon, 2 Apr 2012 14:34:06 -0400 Subject: ->encode_fh() API change pass inode + parent's inode or NULL instead of dentry + bool saying whether we want the parent or not. NOTE: that needs ceph fix folded in. Signed-off-by: Al Viro --- fs/ceph/export.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'fs/ceph') diff --git a/fs/ceph/export.c b/fs/ceph/export.c index fbb2a643ef10..4f9234c6da61 100644 --- a/fs/ceph/export.c +++ b/fs/ceph/export.c @@ -247,7 +247,9 @@ static struct dentry *ceph_fh_to_parent(struct super_block *sb, } const struct export_operations ceph_export_ops = { +#ifdef CEPH_BREAKAGE_FIXED .encode_fh = ceph_encode_fh, +#endif .fh_to_dentry = ceph_fh_to_dentry, .fh_to_parent = ceph_fh_to_parent, }; -- cgit v1.2.1 From c862868bb455694704c255481369c40d7185eb25 Mon Sep 17 00:00:00 2001 From: Sage Weil Date: Thu, 5 Apr 2012 12:07:36 -0700 Subject: ceph: move encode_fh to new API Use parent_inode has a flag for whether nfsd wants a connectable fh, but generate one opportunistically so that we can take advantage of the additional info in there. Signed-off-by: Sage Weil Signed-off-by: Al Viro --- fs/ceph/export.c | 34 +++++++++++++++++++++------------- 1 file changed, 21 insertions(+), 13 deletions(-) (limited to 'fs/ceph') diff --git a/fs/ceph/export.c b/fs/ceph/export.c index 4f9234c6da61..8e1b60e557b6 100644 --- a/fs/ceph/export.c +++ b/fs/ceph/export.c @@ -40,38 +40,49 @@ struct ceph_nfs_confh { u32 parent_name_hash; } __attribute__ ((packed)); -static int ceph_encode_fh(struct dentry *dentry, u32 *rawfh, int *max_len, - int connectable) +/* + * The presence of @parent_inode here tells us whether NFS wants a + * connectable file handle. However, we want to make a connectionable + * file handle unconditionally so that the MDS gets as much of a hint + * as possible. That means we only use @parent_dentry to indicate + * whether nfsd wants a connectable fh, and whether we should indicate + * failure from a too-small @max_len. + */ +static int ceph_encode_fh(struct inode *inode, u32 *rawfh, int *max_len, + struct inode *parent_inode) { int type; struct ceph_nfs_fh *fh = (void *)rawfh; struct ceph_nfs_confh *cfh = (void *)rawfh; - struct dentry *parent; - struct inode *inode = dentry->d_inode; int connected_handle_length = sizeof(*cfh)/4; int handle_length = sizeof(*fh)/4; + struct dentry *dentry = d_find_alias(inode); + struct dentry *parent; /* don't re-export snaps */ if (ceph_snap(inode) != CEPH_NOSNAP) return -EINVAL; - spin_lock(&dentry->d_lock); - parent = dentry->d_parent; - if (*max_len >= connected_handle_length) { + /* if we found an alias, generate a connectable fh */ + if (*max_len >= connected_handle_length && dentry) { dout("encode_fh %p connectable\n", dentry); - cfh->ino = ceph_ino(dentry->d_inode); + spin_lock(&dentry->d_lock); + parent = dentry->d_parent; + cfh->ino = ceph_ino(inode); cfh->parent_ino = ceph_ino(parent->d_inode); cfh->parent_name_hash = ceph_dentry_hash(parent->d_inode, dentry); *max_len = connected_handle_length; type = 2; + spin_unlock(&dentry->d_lock); } else if (*max_len >= handle_length) { - if (connectable) { + if (parent_inode) { + /* nfsd wants connectable */ *max_len = connected_handle_length; type = 255; } else { dout("encode_fh %p\n", dentry); - fh->ino = ceph_ino(dentry->d_inode); + fh->ino = ceph_ino(inode); *max_len = handle_length; type = 1; } @@ -79,7 +90,6 @@ static int ceph_encode_fh(struct dentry *dentry, u32 *rawfh, int *max_len, *max_len = handle_length; type = 255; } - spin_unlock(&dentry->d_lock); return type; } @@ -247,9 +257,7 @@ static struct dentry *ceph_fh_to_parent(struct super_block *sb, } const struct export_operations ceph_export_ops = { -#ifdef CEPH_BREAKAGE_FIXED .encode_fh = ceph_encode_fh, -#endif .fh_to_dentry = ceph_fh_to_dentry, .fh_to_parent = ceph_fh_to_parent, }; -- cgit v1.2.1 From a3860c1c5dd1137db23d7786d284939c5761d517 Mon Sep 17 00:00:00 2001 From: Xi Wang Date: Thu, 31 May 2012 16:26:04 -0700 Subject: introduce SIZE_MAX ULONG_MAX is often used to check for integer overflow when calculating allocation size. While ULONG_MAX happens to work on most systems, there is no guarantee that `size_t' must be the same size as `long'. This patch introduces SIZE_MAX, the maximum value of `size_t', to improve portability and readability for allocation size validation. Signed-off-by: Xi Wang Acked-by: Alex Elder Cc: David Airlie Cc: Pekka Enberg Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/ceph/snap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/ceph') diff --git a/fs/ceph/snap.c b/fs/ceph/snap.c index f04c0961f993..e5206fc76562 100644 --- a/fs/ceph/snap.c +++ b/fs/ceph/snap.c @@ -331,7 +331,7 @@ static int build_snap_context(struct ceph_snap_realm *realm) /* alloc new snap context */ err = -ENOMEM; - if (num > (ULONG_MAX - sizeof(*snapc)) / sizeof(u64)) + if (num > (SIZE_MAX - sizeof(*snapc)) / sizeof(u64)) goto fail; snapc = kzalloc(sizeof(*snapc) + num*sizeof(u64), GFP_NOFS); if (!snapc) -- cgit v1.2.1