X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Finclude%2Flinux%2Flustre_smfs.h;h=b6fd845b1477c3b3ec9a683808fe624fd34e3c85;hb=9d4b898b1c1c7c318fda5f0c345ed726c774c06a;hp=ba335482b7855bf0cf70b5710b11a337ba5d96dc;hpb=32b4812a6afd1e71a3576835d445622d38cdafd1;p=fs%2Flustre-release.git diff --git a/lustre/include/linux/lustre_smfs.h b/lustre/include/linux/lustre_smfs.h index ba33548..b6fd845 100644 --- a/lustre/include/linux/lustre_smfs.h +++ b/lustre/include/linux/lustre_smfs.h @@ -1,9 +1,45 @@ +/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- + * vim:expandtab:shiftwidth=8:tabstop=8: + * + * Copyright (C) 2001-2003 Cluster File Systems, Inc. + * + * 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 { @@ -40,6 +76,14 @@ struct mds_kml_pack_info { 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 */ @@ -54,12 +98,16 @@ struct smfs_super_info { 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 { @@ -79,31 +127,40 @@ struct fs_extent{ __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)) @@ -113,7 +170,9 @@ struct fs_extent{ #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) @@ -143,6 +202,18 @@ struct fs_extent{ #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" @@ -238,6 +309,7 @@ static inline void duplicate_inode(struct inode *dst_inode, 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; @@ -248,9 +320,10 @@ static inline void post_smfs_inode(struct inode *inode, { 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; @@ -260,28 +333,32 @@ static inline void post_smfs_inode(struct inode *inode, 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, @@ -291,6 +368,7 @@ 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) @@ -300,16 +378,55 @@ 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); @@ -324,6 +441,11 @@ static inline void post_smfs_dentry(struct dentry *cache_dentry) { 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); @@ -356,7 +478,6 @@ static inline int lookup_by_path(char *path, int flags, struct nameidata *nd) } /*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; @@ -367,6 +488,7 @@ static inline int smfs_do_rec(struct inode *inode) return 1; return 0; } + static inline int smfs_cache_hook(struct inode *inode) { struct smfs_super_info *smfs_info = I2CSB(inode); @@ -377,6 +499,18 @@ static inline int smfs_cache_hook(struct inode *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) \ { \ @@ -396,5 +530,12 @@ extern int smfs_rec_precreate(struct dentry *dentry, int *num, struct obdo *oa); 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 */