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-rw-r--r--fs/ceph/super.h73
1 files changed, 38 insertions, 35 deletions
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index 4c3c964b1c54..a3995ebe0623 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -457,15 +457,7 @@ ceph_vino(const struct inode *inode)
return ceph_inode(inode)->i_vino;
}
-/*
- * ino_t is <64 bits on many architectures, blech.
- *
- * i_ino (kernel inode) st_ino (userspace)
- * i386 32 32
- * x86_64+ino32 64 32
- * x86_64 64 64
- */
-static inline u32 ceph_ino_to_ino32(__u64 vino)
+static inline u32 ceph_ino_to_ino32(u64 vino)
{
u32 ino = vino & 0xffffffff;
ino ^= vino >> 32;
@@ -475,34 +467,17 @@ static inline u32 ceph_ino_to_ino32(__u64 vino)
}
/*
- * kernel i_ino value
+ * Inode numbers in cephfs are 64 bits, but inode->i_ino is 32-bits on
+ * some arches. We generally do not use this value inside the ceph driver, but
+ * we do want to set it to something, so that generic vfs code has an
+ * appropriate value for tracepoints and the like.
*/
-static inline ino_t ceph_vino_to_ino(struct ceph_vino vino)
+static inline ino_t ceph_vino_to_ino_t(struct ceph_vino vino)
{
-#if BITS_PER_LONG == 32
- return ceph_ino_to_ino32(vino.ino);
-#else
+ if (sizeof(ino_t) == sizeof(u32))
+ return ceph_ino_to_ino32(vino.ino);
return (ino_t)vino.ino;
-#endif
-}
-
-/*
- * user-visible ino (stat, filldir)
- */
-#if BITS_PER_LONG == 32
-static inline ino_t ceph_translate_ino(struct super_block *sb, ino_t ino)
-{
- return ino;
-}
-#else
-static inline ino_t ceph_translate_ino(struct super_block *sb, ino_t ino)
-{
- if (ceph_test_mount_opt(ceph_sb_to_client(sb), INO32))
- ino = ceph_ino_to_ino32(ino);
- return ino;
}
-#endif
-
/* for printf-style formatting */
#define ceph_vinop(i) ceph_inode(i)->i_vino.ino, ceph_inode(i)->i_vino.snap
@@ -511,11 +486,34 @@ static inline u64 ceph_ino(struct inode *inode)
{
return ceph_inode(inode)->i_vino.ino;
}
+
static inline u64 ceph_snap(struct inode *inode)
{
return ceph_inode(inode)->i_vino.snap;
}
+/**
+ * ceph_present_ino - format an inode number for presentation to userland
+ * @sb: superblock where the inode lives
+ * @ino: inode number to (possibly) convert
+ *
+ * If the user mounted with the ino32 option, then the 64-bit value needs
+ * to be converted to something that can fit inside 32 bits. Note that
+ * internal kernel code never uses this value, so this is entirely for
+ * userland consumption.
+ */
+static inline u64 ceph_present_ino(struct super_block *sb, u64 ino)
+{
+ if (unlikely(ceph_test_mount_opt(ceph_sb_to_client(sb), INO32)))
+ return ceph_ino_to_ino32(ino);
+ return ino;
+}
+
+static inline u64 ceph_present_inode(struct inode *inode)
+{
+ return ceph_present_ino(inode->i_sb, ceph_ino(inode));
+}
+
static inline int ceph_ino_compare(struct inode *inode, void *data)
{
struct ceph_vino *pvino = (struct ceph_vino *)data;
@@ -524,11 +522,16 @@ static inline int ceph_ino_compare(struct inode *inode, void *data)
ci->i_vino.snap == pvino->snap;
}
+
static inline struct inode *ceph_find_inode(struct super_block *sb,
struct ceph_vino vino)
{
- ino_t t = ceph_vino_to_ino(vino);
- return ilookup5(sb, t, ceph_ino_compare, &vino);
+ /*
+ * NB: The hashval will be run through the fs/inode.c hash function
+ * anyway, so there is no need to squash the inode number down to
+ * 32-bits first. Just use low-order bits on arches with 32-bit long.
+ */
+ return ilookup5(sb, (unsigned long)vino.ino, ceph_ino_compare, &vino);
}