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ceph: add ino32 mount option 

The ino32 mount option forces the ceph fs to report 32 bit
ino values.  This is useful for 64 bit kernels with 32 bit userspace.

Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
This commit is contained in:
Yehuda Sadeh 2011-01-21 16:44:03 -08:00 committed by Sage Weil
parent 483fac7148
commit ad1fee96cb
4 changed files with 65 additions and 25 deletions
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11
fs/ceph/dir.c
View File

@ -161,7 +161,7 @@ more:
filp->f_pos = di->offset;
err = filldir(dirent, dentry->d_name.name,
dentry->d_name.len, di->offset,
dentry->d_inode->i_ino,
ceph_translate_ino(dentry->d_sb, dentry->d_inode->i_ino),
dentry->d_inode->i_mode >> 12);
if (last) {
@ -245,15 +245,17 @@ static int ceph_readdir(struct file *filp, void *dirent, filldir_t filldir)
dout("readdir off 0 -> '.'\n");
if (filldir(dirent, ".", 1, ceph_make_fpos(0, 0),
inode->i_ino, inode->i_mode >> 12) < 0)
ceph_translate_ino(inode->i_sb, inode->i_ino),
inode->i_mode >> 12) < 0)
return 0;
filp->f_pos = 1;
off = 1;
}
if (filp->f_pos == 1) {
ino_t ino = filp->f_dentry->d_parent->d_inode->i_ino;
dout("readdir off 1 -> '..'\n");
if (filldir(dirent, "..", 2, ceph_make_fpos(0, 1),
filp->f_dentry->d_parent->d_inode->i_ino,
ceph_translate_ino(inode->i_sb, ino),
inode->i_mode >> 12) < 0)
return 0;
filp->f_pos = 2;
@ -377,7 +379,8 @@ more:
if (filldir(dirent,
rinfo->dir_dname[off - fi->offset],
rinfo->dir_dname_len[off - fi->offset],
pos, ino, ftype) < 0) {
pos,
ceph_translate_ino(inode->i_sb, ino), ftype) < 0) {
dout("filldir stopping us...\n");
return 0;
}

9
fs/ceph/inode.c
View File

@ -36,6 +36,13 @@ static void ceph_vmtruncate_work(struct work_struct *work);
/*
* find or create an inode, given the ceph ino number
*/
static int ceph_set_ino_cb(struct inode *inode, void *data)
{
ceph_inode(inode)->i_vino = *(struct ceph_vino *)data;
inode->i_ino = ceph_vino_to_ino(*(struct ceph_vino *)data);
return 0;
}
struct inode *ceph_get_inode(struct super_block *sb, struct ceph_vino vino)
{
struct inode *inode;
@ -1809,7 +1816,7 @@ int ceph_getattr(struct vfsmount *mnt, struct dentry *dentry,
err = ceph_do_getattr(inode, CEPH_STAT_CAP_INODE_ALL);
if (!err) {
generic_fillattr(inode, stat);
stat->ino = inode->i_ino;
stat->ino = ceph_translate_ino(inode->i_sb, inode->i_ino);
if (ceph_snap(inode) != CEPH_NOSNAP)
stat->dev = ceph_snap(inode);
else

5
fs/ceph/super.c
View File

@ -131,6 +131,7 @@ enum {
Opt_rbytes,
Opt_norbytes,
Opt_noasyncreaddir,
Opt_ino32,
};
static match_table_t fsopt_tokens = {
@ -150,6 +151,7 @@ static match_table_t fsopt_tokens = {
{Opt_rbytes, "rbytes"},
{Opt_norbytes, "norbytes"},
{Opt_noasyncreaddir, "noasyncreaddir"},
{Opt_ino32, "ino32"},
{-1, NULL}
};
@ -225,6 +227,9 @@ static int parse_fsopt_token(char *c, void *private)
case Opt_noasyncreaddir:
fsopt->flags |= CEPH_MOUNT_OPT_NOASYNCREADDIR;
break;
case Opt_ino32:
fsopt->flags |= CEPH_MOUNT_OPT_INO32;
break;
default:
BUG_ON(token);
}

65
fs/ceph/super.h
View File

@ -27,6 +27,7 @@
#define CEPH_MOUNT_OPT_DIRSTAT (1<<4) /* `cat dirname` for stats */
#define CEPH_MOUNT_OPT_RBYTES (1<<5) /* dir st_bytes = rbytes */
#define CEPH_MOUNT_OPT_NOASYNCREADDIR (1<<7) /* no dcache readdir */
#define CEPH_MOUNT_OPT_INO32 (1<<8) /* 32 bit inos */
#define CEPH_MOUNT_OPT_DEFAULT (CEPH_MOUNT_OPT_RBYTES)
@ -319,6 +320,16 @@ static inline struct ceph_inode_info *ceph_inode(struct inode *inode)
return container_of(inode, struct ceph_inode_info, vfs_inode);
}
static inline struct ceph_fs_client *ceph_inode_to_client(struct inode *inode)
{
return (struct ceph_fs_client *)inode->i_sb->s_fs_info;
}
static inline struct ceph_fs_client *ceph_sb_to_client(struct super_block *sb)
{
return (struct ceph_fs_client *)sb->s_fs_info;
}
static inline struct ceph_vino ceph_vino(struct inode *inode)
{
return ceph_inode(inode)->i_vino;
@ -327,19 +338,49 @@ static inline struct ceph_vino ceph_vino(struct inode *inode)
/*
* ino_t is <64 bits on many architectures, blech.
*
* don't include snap in ino hash, at least for now.
* 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(ino_t ino)
{
ino ^= ino >> (sizeof(ino) * 8 - 32);
if (!ino)
ino = 1;
return ino;
}
/*
* kernel i_ino value
*/
static inline ino_t ceph_vino_to_ino(struct ceph_vino vino)
{
ino_t ino = (ino_t)vino.ino; /* ^ (vino.snap << 20); */
#if BITS_PER_LONG == 32
ino ^= vino.ino >> (sizeof(u64)-sizeof(ino_t)) * 8;
if (!ino)
ino = 1;
ino = ceph_ino_to_ino32(ino);
#endif
return ino;
}
/*
* 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
@ -428,13 +469,6 @@ static inline loff_t ceph_make_fpos(unsigned frag, unsigned off)
return ((loff_t)frag << 32) | (loff_t)off;
}
static inline int ceph_set_ino_cb(struct inode *inode, void *data)
{
ceph_inode(inode)->i_vino = *(struct ceph_vino *)data;
inode->i_ino = ceph_vino_to_ino(*(struct ceph_vino *)data);
return 0;
}
/*
* caps helpers
*/
@ -503,15 +537,6 @@ extern void ceph_reservation_status(struct ceph_fs_client *client,
int *total, int *avail, int *used,
int *reserved, int *min);
static inline struct ceph_fs_client *ceph_inode_to_client(struct inode *inode)
{
return (struct ceph_fs_client *)inode->i_sb->s_fs_info;
}
static inline struct ceph_fs_client *ceph_sb_to_client(struct super_block *sb)
{
return (struct ceph_fs_client *)sb->s_fs_info;
}
/*