+/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
+ * vim:expandtab:shiftwidth=8:tabstop=8:
+ *
+ * Copyright (C) 2001-2003 Cluster File Systems, Inc. <info@clusterfs.com>
+ *
+ * This file is part of Lustre, http://www.lustre.org.
+ *
+ * Lustre is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * Lustre is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Lustre; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * smfs data structures.
+ * See also lustre_idl.h for wire formats of requests.
+ *
+ */
+
#ifndef __LUSTRE_SMFS_H
#define __LUSTRE_SMFS_H
+struct snap_inode_info {
+ int sn_flags; /*the flags indicated inode type */
+ int sn_gen; /*the inode generation*/
+ int sn_index; /*the inode snap_index*/
+ ino_t sn_root_ino; /*the root ino of this snap*/
+};
struct smfs_inode_info {
+ /* this first part of struct should be the same as in mds_info_info */
+ struct lustre_id smi_id;
+
+ /* smfs part. */
struct inode *smi_inode;
__u32 smi_flags;
+ struct snap_inode_info sm_sninfo;
};
struct journal_operations {
int mpi_size[4];
int mpi_total_size;
};
+typedef int (*smfs_hook_func)(struct inode *inode, void *dentry,
+ void *data1, void *data2, int op, void *handle);
+struct smfs_hook_ops {
+ struct list_head smh_list;
+ char * smh_name;
+ smfs_hook_func smh_post_op;
+ smfs_hook_func smh_pre_op;
+};
struct smfs_super_info {
struct super_block *smsi_sb;
struct vfsmount *smsi_mnt; /* mount the cache kern */
char *smsi_cache_ftype; /* cache file system type */
char *smsi_ftype; /* file system type */
struct obd_export *smsi_exp; /* file system obd exp */
- smfs_pack_rec_func smsi_pack_rec[PACK_MAX]; /* sm_pack_rec type ops */
- __u32 smsi_flags; /* flags */
- __u32 smsi_ops_check;
+ struct snap_super_info *smsi_snap_info; /* snap table cow */
+ smfs_pack_rec_func smsi_pack_rec[PACK_MAX]; /* sm_pack_rec type ops */
+ __u32 smsi_flags; /* flags */
+ __u32 smsi_ops_check;
+ struct list_head smsi_hook_list;
+ kmem_cache_t * smsi_inode_cachep; /*inode_cachep*/
};
-#define SMFS_FILE_TYPE "smfs"
+
+#define SMFS_FILE_TYPE "smfs"
#define SMFS_FILE_MAGIC 0x19760218
struct smfs_file_info {
__u32 e_num; /* number of blocks covered by extent */
};
-#define I2SMI(inode) ((struct smfs_inode_info *) (&(inode->u.generic_ip)))
+#define I2SMI(inode) ((struct smfs_inode_info *) ((inode->u.generic_ip)))
+#define I2FSI(inode) (((inode->u.generic_ip)))
+
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
-#define S2SMI(sb) ((struct smfs_super_info *) (&(sb->u.generic_sbp)))
-#define S2CSB(sb) (((struct smfs_super_info *) (&(sb->u.generic_sbp)))->smsi_sb)
+#define S2FSI(sb) (((sb->u.generic_sbp)))
+#define S2SMI(sb) ((struct smfs_super_info *) ((sb->u.generic_sbp)))
+#define S2CSB(sb) (((struct smfs_super_info *)((sb->u.generic_sbp)))->smsi_sb)
#else
+#define S2FSI(sb) ((sb->s_fs_info))
#define S2SMI(sb) ((struct smfs_super_info *) (sb->s_fs_info))
#define S2CSB(sb) (((struct smfs_super_info *) (sb->s_fs_info))->smsi_sb)
#endif
-#define I2CI(inode) (((struct smfs_inode_info*) (&(inode->u.generic_ip)))->smi_inode)
+#define I2CI(inode) (((struct smfs_inode_info*) ((inode->u.generic_ip)))->smi_inode)
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
-#define I2CSB(inode) ((struct smfs_super_info *) (&(inode->i_sb->u.generic_sbp)))
+#define I2CSB(inode) ((struct smfs_super_info *) ((inode->i_sb->u.generic_sbp)))
#else
#define I2CSB(inode) ((struct smfs_super_info *) (inode->i_sb->s_fs_info))
#endif
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
#define I2FOPS(inode) (((struct smfs_super_info *) \
- (&(inode->i_sb->u.generic_sbp)))->sm_cache_fsfilt)
+ ((inode->i_sb->u.generic_sbp)))->sm_cache_fsfilt)
#else
#define I2FOPS(inode) (((struct smfs_super_info *) \
(inode->i_sb->s_fs_info))->sm_cache_fsfilt)
#endif
+#define I2SNAPI(inode) (&(I2SMI(inode)->sm_sninfo))
+#define I2SNAPCOPS(inode) ((S2SMI(inode->i_sb))->smsi_snap_info->snap_cache_fsfilt)
+#define I2SNAPOPS(inode) ((S2SMI(inode->i_sb))->smsi_snap_info->snap_fsfilt)
+
+#define S2SNAPI(sb) (S2SMI(sb)->smsi_snap_info)
#define F2SMFI(file) ((struct smfs_file_info *)((file->private_data)))
#define F2CF(file) (((struct smfs_file_info *) ((file->private_data)))->c_file)
#define SIZE2BLKS(size, inode) ((size + (I2CI(inode)->i_blksize)) >> (I2CI(inode)->i_blkbits))
#define SM_INIT_REC 0x2
#define SM_CACHE_HOOK 0x4
#define SM_OVER_WRITE 0x8
-#define SM_DIRTY_WRITE 0x10
+#define SM_DIRTY_WRITE 0x10
+#define SM_DO_COW 0x20
+#define SM_DO_COWED 0x40
#define SMFS_DO_REC(smfs_info) (smfs_info->smsi_flags & SM_DO_REC)
#define SMFS_SET_REC(smfs_info) (smfs_info->smsi_flags |= SM_DO_REC)
#define SMFS_SET_INODE_DIRTY_WRITE(inode) (I2SMI(inode)->smi_flags |= SM_DIRTY_WRITE)
#define SMFS_CLEAN_INODE_DIRTY_WRITE(inode) (I2SMI(inode)->smi_flags &= ~SM_DIRTY_WRITE)
+#define SMFS_DO_COW(smfs_info) (smfs_info->smsi_flags & SM_DO_COW)
+#define SMFS_SET_COW(smfs_info) (smfs_info->smsi_flags |= SM_DO_COW)
+#define SMFS_CLEAN_COW(smfs_info) (smfs_info->smsi_flags &= ~SM_DO_COW)
+
+#define SMFS_SET_INODE_COW(inode) (I2SMI(inode)->smi_flags |= SM_DO_COW)
+#define SMFS_DO_INODE_COW(inode) (I2SMI(inode)->smi_flags & SM_DO_COW)
+#define SMFS_CLEAN_INODE_COW(inode) (I2SMI(inode)->smi_flags &= ~SM_DO_COW)
+
+#define SMFS_SET_INODE_COWED(inode) (I2SMI(inode)->smi_flags |= SM_DO_COWED)
+#define SMFS_DO_INODE_COWED(inode) (I2SMI(inode)->smi_flags & SM_DO_COWED)
+#define SMFS_CLEAN_INODE_COWED(inode) (I2SMI(inode)->smi_flags &= ~SM_DO_COWED)
+
#define LVFS_SMFS_BACK_ATTR "lvfs_back_attr"
dst_inode->i_version = src_inode->i_version;
dst_inode->i_state = src_inode->i_state;
dst_inode->i_generation = src_inode->i_generation;
+ dst_inode->i_flags = src_inode->i_flags;
/* This is to make creating special files working. */
dst_inode->i_rdev = src_inode->i_rdev;
{
if (inode && cache_inode) {
duplicate_inode(inode, cache_inode);
- /*Here we must release the cache_inode,
- *Otherwise we will have no chance to
- *do it
+
+ /*
+ * here we must release the cache_inode, otherwise we will have
+ * no chance to do it later.
*/
cache_inode->i_state &=~I_LOCK;
inode->i_blocks = cache_inode->i_blocks;
static inline void pre_smfs_inode(struct inode *inode,
struct inode *cache_inode)
{
- if (inode && cache_inode)
- duplicate_inode(cache_inode, inode);
+ if (inode && cache_inode) {
+ cache_inode->i_state = inode->i_state;
+ // duplicate_inode(cache_inode, inode);
+ }
}
/* instantiate a file handle to the cache file */
static inline void duplicate_file(struct file *dst_file, struct file *src_file)
{
- dst_file->f_pos = src_file->f_pos;
- dst_file->f_mode = src_file->f_mode;
- dst_file->f_flags = src_file->f_flags;
- dst_file->f_owner = src_file->f_owner;
- dst_file->f_vfsmnt = src_file->f_vfsmnt;
-
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
- dst_file->f_reada = src_file->f_reada;
- dst_file->f_ramax = src_file->f_ramax;
- dst_file->f_raend = src_file->f_raend;
- dst_file->f_ralen = src_file->f_ralen;
- dst_file->f_rawin = src_file->f_rawin;
-#else
- dst_file->f_ra = src_file->f_ra;
-#endif
+ if (dst_file && src_file) {
+ dst_file->f_pos = src_file->f_pos;
+ dst_file->f_mode = src_file->f_mode;
+ dst_file->f_flags = src_file->f_flags;
+ dst_file->f_owner = src_file->f_owner;
+ dst_file->f_vfsmnt = src_file->f_vfsmnt;
+
+ #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+ dst_file->f_reada = src_file->f_reada;
+ dst_file->f_ramax = src_file->f_ramax;
+ dst_file->f_raend = src_file->f_raend;
+ dst_file->f_ralen = src_file->f_ralen;
+ dst_file->f_rawin = src_file->f_rawin;
+ #else
+ dst_file->f_ra = src_file->f_ra;
+ #endif
+ }
}
static inline void duplicate_sb(struct super_block *dst_sb,
dst_sb->s_magic = src_sb->s_magic;
dst_sb->s_blocksize_bits = src_sb->s_blocksize_bits;
dst_sb->s_maxbytes = src_sb->s_maxbytes;
+ dst_sb->s_flags = src_sb->s_flags;
}
static inline void d_unalloc(struct dentry *dentry)
INIT_LIST_HEAD(&dentry->d_hash);
#else
hlist_del_init(&dentry->d_hash);
+ dentry->d_flags |= DCACHE_UNHASHED;
#endif
dput(dentry); /* this will free the dentry memory */
}
+static inline int smfs_get_dentry_name_index(struct dentry *dentry,
+ struct qstr *str,
+ int *index)
+{
+ char *name = (char *)dentry->d_name.name;
+ unsigned long hash;
+ unsigned char c;
+ char *str_name;
+ int len = 0, name_len = 0;
+
+ name_len = dentry->d_name.len;
+ if (!name_len)
+ return 0;
+ hash = init_name_hash();
+ while (name_len--) {
+ c = *(const unsigned char *)name++;
+ if (c == ':' || c == '\0')
+ break;
+ hash = partial_name_hash(c, hash);
+ len ++;
+ }
+ str->hash = end_name_hash(hash);
+ OBD_ALLOC(str_name, len + 1);
+ memcpy(str_name, dentry->d_name.name, len);
+ str->len = len;
+ str->name = str_name;
+ if (index && c == ':') {
+ *index = simple_strtoul(name, 0, 0);
+ }
+ return 0;
+}
+
+static inline void smfs_free_dentry_name(struct qstr *str)
+{
+ char *name = (char*)str->name;
+ OBD_FREE(name, str->len + 1);
+}
+
static inline struct dentry *pre_smfs_dentry(struct dentry *parent_dentry,
struct inode *cache_inode,
struct dentry *dentry)
{
struct dentry *cache_dentry = NULL;
-
+
cache_dentry = d_alloc(parent_dentry, &dentry->d_name);
if (!cache_dentry)
RETURN(NULL);
{
if (!cache_dentry)
return;
+
+ /*
+ * this is needed because d_unalloc() calls dput(), which in turn calls
+ * iput() on dentry inode.
+ */
if (cache_dentry->d_inode)
igrab(cache_dentry->d_inode);
d_unalloc(cache_dentry);
}
/*FIXME there should be more conditions in this check*/
-
static inline int smfs_do_rec(struct inode *inode)
{
struct super_block *sb = inode->i_sb;
return 1;
return 0;
}
+
static inline int smfs_cache_hook(struct inode *inode)
{
struct smfs_super_info *smfs_info = I2CSB(inode);
else
return 0;
}
+
+static inline int smfs_do_cow(struct inode *inode)
+{
+ struct super_block *sb = inode->i_sb;
+ struct smfs_super_info *smfs_info = S2SMI(sb);
+
+ if (SMFS_DO_COW(smfs_info) && SMFS_DO_INODE_COW(inode))
+ return 1;
+ return 0;
+}
+
+
/* XXX BUG 3188 -- must return to one set of opcodes */
#define SMFS_TRANS_OP(inode, op) \
{ \
extern int smfs_rec_md(struct inode *inode, void * lmm, int lmm_size);
extern int smfs_rec_unpack(struct smfs_proc_args *args, char *record,
char **pbuf, int *opcode);
+
+
+extern int smfs_post_setup(struct super_block *sb, struct vfsmount *mnt);
+extern int smfs_post_cleanup(struct super_block *sb);
+extern struct inode *smfs_get_inode (struct super_block *sb, ino_t hash,
+ struct inode *dir, int index);
+extern int is_smfs_sb(struct super_block *sb);
#endif /* _LUSTRE_SMFS_H */
git://git.whamcloud.com / fs / lustre-release.git / blobdiff