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>
18 #define LL_SUPER_MAGIC 0x0BD00BD0;
20 struct ll_inode_info {
22 struct list_head lli_inodes;
23 struct list_head lli_pages;
24 char lli_inline[OBD_INLINESZ];
28 struct list_head ll_list; /* list of supers */
29 struct obd_conn ll_conn;
30 struct super_block *ll_super;
31 struct obd_device *ll_obd;
32 struct obd_ops *ll_ops;
33 ino_t ll_rootino; /* number of root inode */
34 int ll_minor; /* minor of /dev/obdX */
35 struct list_head ll_inodes; /* list of dirty inodes */
36 unsigned long ll_cache_count;
37 struct semaphore ll_list_mutex;
41 static inline struct ll_inode_info *ll_i2info(struct inode *inode)
43 return (struct ll_inode_info *)&(inode->u.generic_ip);
46 static inline int ll_has_inline(struct inode *inode)
48 return (ll_i2info(inode)->lli_flags & OBD_FL_INLINEDATA);
51 static void inline ll_from_inode(struct obdo *oa, struct inode *inode)
53 struct ll_inode_info *oinfo = ll_i2info(inode);
55 CDEBUG(D_INFO, "src inode %ld, dst obdo %ld valid 0x%08x\n",
56 inode->i_ino, (long)oa->o_id, oa->o_valid);
57 obdo_from_inode(oa, inode);
58 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
59 CDEBUG(D_INODE, "copying device %x from inode to obdo\n",
61 *((obd_rdev *)oa->o_inline) = kdev_t_to_nr(inode->i_rdev);
62 oa->o_obdflags |= OBD_FL_INLINEDATA;
63 oa->o_valid |= OBD_MD_FLINLINE;
64 } else if (ll_has_inline(inode)) {
65 CDEBUG(D_INODE, "copying inline data from inode to obdo\n");
66 memcpy(oa->o_inline, oinfo->lli_inline, OBD_INLINESZ);
67 oa->o_obdflags |= OBD_FL_INLINEDATA;
68 oa->o_valid |= OBD_MD_FLINLINE;
72 static __inline__ void mds_rep_to_inode(struct inode *dst, struct mds_rep *rep)
75 if ( rep->valid & OBD_MD_FLID )
76 dst->i_ino = rep->ino;
77 if ( rep->valid & OBD_MD_FLATIME )
78 dst->i_atime = rep->atime;
79 if ( rep->valid & OBD_MD_FLMTIME )
80 dst->i_mtime = rep->mtime;
81 if ( rep->valid & OBD_MD_FLCTIME )
82 dst->i_ctime = rep->ctime;
83 if ( rep->valid & OBD_MD_FLSIZE )
84 dst->i_size = rep->size;
85 if ( rep->valid & OBD_MD_FLMODE )
86 dst->i_mode = rep->mode;
87 if ( rep->valid & OBD_MD_FLUID )
88 dst->i_uid = rep->uid;
89 if ( rep->valid & OBD_MD_FLGID )
90 dst->i_gid = rep->gid;
91 if ( rep->valid & OBD_MD_FLFLAGS )
92 dst->i_flags = rep->flags;
93 if ( rep->valid & OBD_MD_FLNLINK )
94 dst->i_nlink = rep->nlink;
95 if ( rep->valid & OBD_MD_FLGENER )
96 dst->i_generation = rep->generation;
99 static void inline ll_to_inode(struct inode *inode, struct mds_rep *rep)
101 CDEBUG(D_INFO, "src obdo %d valid 0x%08x, dst inode %ld\n",
102 rep->ino, rep->valid, inode->i_ino);
104 mds_rep_to_inode(inode, rep);
107 if (obdo_has_inline(oa)) {
108 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
109 S_ISFIFO(inode->i_mode)) {
110 obd_rdev rdev = *((obd_rdev *)oa->o_inline);
112 "copying device %x from obdo to inode\n", rdev);
113 init_special_inode(inode, inode->i_mode, rdev);
115 CDEBUG(D_INFO, "copying inline from obdo to inode\n");
116 memcpy(oinfo->lli_inline, oa->o_inline, OBD_INLINESZ);
118 oinfo->lli_flags |= OBD_FL_INLINEDATA;
128 struct list_head rq_plist; /* linked list of req's */
129 unsigned long rq_jiffies;
130 struct page *rq_page; /* page to be written */
133 extern struct list_head ll_super_list; /* list of all LL superblocks */
138 #define EXT2_DIR_PAD 4
139 #define EXT2_DIR_ROUND (EXT2_DIR_PAD - 1)
140 #define EXT2_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT2_DIR_ROUND) & \
142 #define EXT2_NAME_LEN 255
144 int ll_check_dir_entry (const char * function, struct inode * dir,
145 struct ext2_dir_entry_2 * de, struct page * page,
146 unsigned long offset);
147 extern struct file_operations ll_dir_operations;
148 extern struct inode_operations ll_dir_inode_operations;
151 extern struct file_operations ll_file_operations;
152 extern struct inode_operations ll_file_inode_operations;
155 void ll_dequeue_pages(struct inode *inode);
156 int ll_flushd_init(void);
157 int ll_flushd_cleanup(void);
158 int ll_flush_reqs(struct list_head *inode_list, unsigned long check_time);
159 int ll_flush_dirty_pages(unsigned long check_time);
163 * Structure of the super block
167 #define EXT2_SB(sb) (&((sb)->u.ext2_sb))
169 * Maximal count of links to a file
171 #define EXT2_LINK_MAX 32000
173 * Ext2 directory file types. Only the low 3 bits are used. The
174 * other bits are reserved for now.
176 #define EXT2_FT_UNKNOWN 0
177 #define EXT2_FT_REG_FILE 1
178 #define EXT2_FT_DIR 2
179 #define EXT2_FT_CHRDEV 3
180 #define EXT2_FT_BLKDEV 4
181 #define EXT2_FT_FIFO 5
182 #define EXT2_FT_SOCK 6
183 #define EXT2_FT_SYMLINK 7
185 #define EXT2_FT_MAX 8
187 #define EXT2_BTREE_FL 0x00001000 /* btree format dir */
188 #define EXT2_RESERVED_FL 0x80000000 /* reserved for ext2 lib */
189 #define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002
190 #define EXT2_HAS_COMPAT_FEATURE(sb,mask) \
191 ( EXT2_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) )
192 #define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) \
193 ( EXT2_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) )
196 int ll_do_writepage(struct page *, int sync);
197 int ll_init_pgrqcache(void);
198 void ll_cleanup_pgrqcache(void);
199 inline void ll_pgrq_del(struct ll_pgrq *pgrq);
200 int ll_readpage(struct file *file, struct page *page);
201 int ll_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to);
202 int ll_commit_write(struct file *file, struct page *page, unsigned from, unsigned to);
203 int ll_writepage(struct page *page);
204 struct page *ll_getpage(struct inode *inode, unsigned long offset,
205 int create, int locked);
206 int ll_write_one_page(struct file *file, struct page *page,
207 unsigned long offset, unsigned long bytes,
209 int ll_do_vec_wr(struct inode **inodes, obd_count num_io, obd_count num_oa,
210 struct obdo **obdos, obd_count *oa_bufs,
211 struct page **pages, char **bufs, obd_size *counts,
212 obd_off *offsets, obd_flag *flags);
213 void ll_truncate(struct inode *inode);
216 extern long ll_cache_count;
217 extern long ll_mutex_start;
220 extern struct inode_operations ll_fast_symlink_inode_operations;
221 extern struct inode_operations ll_symlink_inode_operations;
224 void ll_sysctl_init(void);
225 void ll_sysctl_clean(void);
227 static inline struct ll_sb_info *ll_i2sbi(struct inode *inode)
229 return (struct ll_sb_info *) &(inode->i_sb->u.generic_sbp);
232 static inline struct list_head *ll_iplist(struct inode *inode)
234 struct ll_inode_info *info = ll_i2info(inode);
236 return &info->lli_pages;
239 static inline struct list_head *ll_islist(struct inode *inode)
241 struct ll_inode_info *info = ll_i2info(inode);
243 return &info->lli_inodes;
246 static inline struct list_head *ll_slist(struct inode *inode)
248 struct ll_sb_info *sbi = ll_i2sbi(inode);
250 return &sbi->ll_inodes;
253 static void inline ll_set_size (struct inode *inode, obd_size size)
255 inode->i_size = size;
256 inode->i_blocks = (inode->i_size + inode->i_sb->s_blocksize - 1) >>
257 inode->i_sb->s_blocksize_bits;
262 #define obd_down(mutex) { \
263 /* CDEBUG(D_INFO, "get lock\n"); */ \
264 ll_mutex_start = jiffies; \
266 if (jiffies - ll_mutex_start) \
267 CDEBUG(D_CACHE, "waited on mutex %ld jiffies\n", \
268 jiffies - ll_mutex_start); \
271 #define obd_up(mutex) { \
273 if (jiffies - ll_mutex_start > 1) \
274 CDEBUG(D_CACHE, "held mutex for %ld jiffies\n", \
275 jiffies - ll_mutex_start); \
276 /* CDEBUG(D_INFO, "free lock\n"); */ \
279 /* We track if a page has been added to the OBD page cache by stting a
280 * flag on the page. We have chosen a bit that will hopefully not be
283 #define PG_obdcache 29
284 #define OBDAddCachePage(page) test_and_set_bit(PG_obdcache, &(page)->flags)
285 #define OBDClearCachePage(page) clear_bit(PG_obdcache, &(page)->flags)
287 static inline void ll_print_plist(struct inode *inode)
289 struct list_head *page_list = ll_iplist(inode);
290 struct list_head *tmp;
292 CDEBUG(D_INFO, "inode %ld: page", inode->i_ino);
293 /* obd_down(&ll_i2sbi(inode)->ll_list_mutex); */
294 if (list_empty(page_list)) {
295 CDEBUG(D_INFO, " list empty\n");
296 obd_up(&ll_i2sbi(inode)->ll_list_mutex);
301 while ( (tmp = tmp->next) != page_list) {
302 struct ll_pgrq *pgrq;
303 pgrq = list_entry(tmp, struct ll_pgrq, rq_plist);
304 CDEBUG(D_INFO, " %p", pgrq->rq_page);
306 CDEBUG(D_INFO, "\n");
307 /* obd_up(&ll_i2sbi(inode)->ll_list_mutex); */
309 #include <linux/obdo.h>