1 /* object based disk file system
3 * This code is issued under the GNU General Public License.
4 * See the file COPYING in this distribution
6 * Copyright (C), 1999, Stelias Computing Inc
14 #include <linux/obd_class.h>
15 #include <linux/obdo.h>
16 #include <linux/list.h>
17 #include <linux/lustre_net.h>
19 #define LL_SUPER_MAGIC 0x0BD00BD0;
21 #define LL_INLINESZ 60
22 struct ll_inode_info {
25 char lli_inline[LL_INLINESZ];
29 struct list_head ll_list; /* list of supers */
30 struct obd_conn ll_conn;
31 struct super_block *ll_super;
32 ino_t ll_rootino; /* number of root inode */
33 int ll_minor; /* minor of /dev/obdX */
34 struct list_head ll_inodes; /* list of dirty inodes */
35 unsigned long ll_cache_count;
36 struct semaphore ll_list_mutex;
37 struct ptlrpc_client ll_mds_client;
38 struct ptlrpc_client ll_ost_client;
42 static inline struct ll_sb_info *ll_i2sbi(struct inode *inode)
44 return (struct ll_sb_info *) (inode->i_sb->u.generic_sbp);
47 static inline struct ll_inode_info *ll_i2info(struct inode *inode)
49 return (struct ll_inode_info *)&(inode->u.generic_ip);
52 static inline int ll_has_inline(struct inode *inode)
54 return (ll_i2info(inode)->lli_flags & OBD_FL_INLINEDATA);
58 static inline struct obd_conn *ll_i2obdconn(struct inode *inode)
60 return &(ll_i2sbi(inode))->ll_conn;
69 struct list_head rq_plist; /* linked list of req's */
70 unsigned long rq_jiffies;
71 struct page *rq_page; /* page to be written */
74 extern struct list_head ll_super_list; /* list of all LL superblocks */
79 #define EXT2_DIR_PAD 4
80 #define EXT2_DIR_ROUND (EXT2_DIR_PAD - 1)
81 #define EXT2_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT2_DIR_ROUND) & \
83 #define EXT2_NAME_LEN 255
85 int ll_check_dir_entry (const char * function, struct inode * dir,
86 struct ext2_dir_entry_2 * de, struct page * page,
87 unsigned long offset);
88 extern struct file_operations ll_dir_operations;
89 extern struct inode_operations ll_dir_inode_operations;
92 extern struct file_operations ll_file_operations;
93 extern struct inode_operations ll_file_inode_operations;
96 void ll_dequeue_pages(struct inode *inode);
97 int ll_flushd_init(void);
98 int ll_flushd_cleanup(void);
99 int ll_flush_reqs(struct list_head *inode_list, unsigned long check_time);
100 int ll_flush_dirty_pages(unsigned long check_time);
104 * Structure of the super block
108 #define EXT2_SB(sb) (&((sb)->u.ext2_sb))
110 * Maximal count of links to a file
112 #define EXT2_LINK_MAX 32000
114 * Ext2 directory file types. Only the low 3 bits are used. The
115 * other bits are reserved for now.
117 #define EXT2_FT_UNKNOWN 0
118 #define EXT2_FT_REG_FILE 1
119 #define EXT2_FT_DIR 2
120 #define EXT2_FT_CHRDEV 3
121 #define EXT2_FT_BLKDEV 4
122 #define EXT2_FT_FIFO 5
123 #define EXT2_FT_SOCK 6
124 #define EXT2_FT_SYMLINK 7
126 #define EXT2_FT_MAX 8
128 #define EXT2_BTREE_FL 0x00001000 /* btree format dir */
129 #define EXT2_RESERVED_FL 0x80000000 /* reserved for ext2 lib */
130 #define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002
131 #define EXT2_HAS_COMPAT_FEATURE(sb,mask) \
132 ( EXT2_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) )
133 #define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) \
134 ( EXT2_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) )
137 int ll_do_writepage(struct page *, int sync);
138 int ll_init_pgrqcache(void);
139 void ll_cleanup_pgrqcache(void);
140 inline void ll_pgrq_del(struct ll_pgrq *pgrq);
141 int ll_readpage(struct file *file, struct page *page);
142 int ll_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to);
143 int ll_commit_write(struct file *file, struct page *page, unsigned from, unsigned to);
144 int ll_writepage(struct page *page);
145 struct page *ll_getpage(struct inode *inode, unsigned long offset,
146 int create, int locked);
147 int ll_write_one_page(struct file *file, struct page *page,
148 unsigned long offset, unsigned long bytes,
150 int ll_do_vec_wr(struct inode **inodes, obd_count num_io, obd_count num_oa,
151 struct obdo **obdos, obd_count *oa_bufs,
152 struct page **pages, char **bufs, obd_size *counts,
153 obd_off *offsets, obd_flag *flags);
154 void ll_truncate(struct inode *inode);
157 extern long ll_cache_count;
158 extern long ll_mutex_start;
161 extern struct inode_operations ll_fast_symlink_inode_operations;
162 extern struct inode_operations ll_symlink_inode_operations;
165 void ll_sysctl_init(void);
166 void ll_sysctl_clean(void);
170 static inline struct list_head *ll_slist(struct inode *inode)
172 struct ll_sb_info *sbi = ll_i2sbi(inode);
174 return &sbi->ll_inodes;