--- /dev/null
+/* object based disk file system
+ *
+ * This code is issued under the GNU General Public License.
+ * See the file COPYING in this distribution
+ *
+ * Copyright (C), 1999, Stelias Computing Inc
+ *
+ *
+ */
+
+
+#ifndef _LL_H
+#define _LL_H
+#include <linux/obd_class.h>
+#include <linux/obdo.h>
+#include <linux/list.h>
+
+#define LL_SUPER_MAGIC 0x0BD00BD0;
+
+struct ll_inode_info {
+ int lli_flags;
+ struct list_head lli_inodes;
+ struct list_head lli_pages;
+ char lli_inline[OBD_INLINESZ];
+};
+
+struct ll_sb_info {
+ struct list_head ll_list; /* list of supers */
+ struct obd_conn ll_conn;
+ struct super_block *ll_super;
+ struct obd_device *ll_obd;
+ struct obd_ops *ll_ops;
+ ino_t ll_rootino; /* number of root inode */
+ int ll_minor; /* minor of /dev/obdX */
+ struct list_head ll_inodes; /* list of dirty inodes */
+ unsigned long ll_cache_count;
+ struct semaphore ll_list_mutex;
+};
+
+
+static inline struct ll_inode_info *ll_i2info(struct inode *inode)
+{
+ return (struct ll_inode_info *)&(inode->u.generic_ip);
+}
+
+static inline int ll_has_inline(struct inode *inode)
+{
+ return (ll_i2info(inode)->lli_flags & OBD_FL_INLINEDATA);
+}
+
+static void inline ll_from_inode(struct obdo *oa, struct inode *inode)
+{
+ struct ll_inode_info *oinfo = ll_i2info(inode);
+
+ CDEBUG(D_INFO, "src inode %ld, dst obdo %ld valid 0x%08x\n",
+ inode->i_ino, (long)oa->o_id, oa->o_valid);
+ obdo_from_inode(oa, inode);
+ if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
+ CDEBUG(D_INODE, "copying device %x from inode to obdo\n",
+ inode->i_rdev);
+ *((obd_rdev *)oa->o_inline) = kdev_t_to_nr(inode->i_rdev);
+ oa->o_obdflags |= OBD_FL_INLINEDATA;
+ oa->o_valid |= OBD_MD_FLINLINE;
+ } else if (ll_has_inline(inode)) {
+ CDEBUG(D_INODE, "copying inline data from inode to obdo\n");
+ memcpy(oa->o_inline, oinfo->lli_inline, OBD_INLINESZ);
+ oa->o_obdflags |= OBD_FL_INLINEDATA;
+ oa->o_valid |= OBD_MD_FLINLINE;
+ }
+} /* ll_from_inode */
+
+static void inline ll_to_inode(struct inode *inode, struct obdo *oa)
+{
+ struct ll_inode_info *oinfo = ll_i2info(inode);
+
+ CDEBUG(D_INFO, "src obdo %ld valid 0x%08x, dst inode %ld\n",
+ (long)oa->o_id, oa->o_valid, inode->i_ino);
+
+ obdo_to_inode(inode, oa);
+
+ if (obdo_has_inline(oa)) {
+ if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
+ S_ISFIFO(inode->i_mode)) {
+ obd_rdev rdev = *((obd_rdev *)oa->o_inline);
+ CDEBUG(D_INODE,
+ "copying device %x from obdo to inode\n", rdev);
+ init_special_inode(inode, inode->i_mode, rdev);
+ } else {
+ CDEBUG(D_INFO, "copying inline from obdo to inode\n");
+ memcpy(oinfo->lli_inline, oa->o_inline, OBD_INLINESZ);
+ }
+ oinfo->lli_flags |= OBD_FL_INLINEDATA;
+ }
+} /* ll_to_inode */
+
+
+
+
+/* super.c */
+struct ll_pgrq {
+ struct list_head rq_plist; /* linked list of req's */
+ unsigned long rq_jiffies;
+ struct page *rq_page; /* page to be written */
+};
+
+extern struct list_head ll_super_list; /* list of all LL superblocks */
+
+
+
+/* dir.c */
+#define EXT2_DIR_PAD 4
+#define EXT2_DIR_ROUND (EXT2_DIR_PAD - 1)
+#define EXT2_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT2_DIR_ROUND) & \
+ ~EXT2_DIR_ROUND)
+#define EXT2_NAME_LEN 255
+
+int ll_check_dir_entry (const char * function, struct inode * dir,
+ struct ext2_dir_entry_2 * de, struct page * page,
+ unsigned long offset);
+extern struct file_operations ll_dir_operations;
+extern struct inode_operations ll_dir_inode_operations;
+
+/* file.c */
+extern struct file_operations ll_file_operations;
+extern struct inode_operations ll_file_inode_operations;
+
+/* flush.c */
+void ll_dequeue_pages(struct inode *inode);
+int ll_flushd_init(void);
+int ll_flushd_cleanup(void);
+int ll_flush_reqs(struct list_head *inode_list, unsigned long check_time);
+int ll_flush_dirty_pages(unsigned long check_time);
+
+/* namei.c */
+/*
+ * Structure of the super block
+ */
+
+
+#define EXT2_SB(sb) (&((sb)->u.ext2_sb))
+/*
+ * Maximal count of links to a file
+ */
+#define EXT2_LINK_MAX 32000
+/*
+ * Ext2 directory file types. Only the low 3 bits are used. The
+ * other bits are reserved for now.
+ */
+#define EXT2_FT_UNKNOWN 0
+#define EXT2_FT_REG_FILE 1
+#define EXT2_FT_DIR 2
+#define EXT2_FT_CHRDEV 3
+#define EXT2_FT_BLKDEV 4
+#define EXT2_FT_FIFO 5
+#define EXT2_FT_SOCK 6
+#define EXT2_FT_SYMLINK 7
+
+#define EXT2_FT_MAX 8
+
+#define EXT2_BTREE_FL 0x00001000 /* btree format dir */
+#define EXT2_RESERVED_FL 0x80000000 /* reserved for ext2 lib */
+#define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002
+#define EXT2_HAS_COMPAT_FEATURE(sb,mask) \
+ ( EXT2_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) )
+#define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) \
+ ( EXT2_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) )
+
+/* rw.c */
+int ll_do_writepage(struct page *, int sync);
+int ll_init_pgrqcache(void);
+void ll_cleanup_pgrqcache(void);
+inline void ll_pgrq_del(struct ll_pgrq *pgrq);
+int ll_readpage(struct file *file, struct page *page);
+int ll_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to);
+int ll_commit_write(struct file *file, struct page *page, unsigned from, unsigned to);
+int ll_writepage(struct page *page);
+struct page *ll_getpage(struct inode *inode, unsigned long offset,
+ int create, int locked);
+int ll_write_one_page(struct file *file, struct page *page,
+ unsigned long offset, unsigned long bytes,
+ const char * buf);
+int ll_do_vec_wr(struct inode **inodes, obd_count num_io, obd_count num_oa,
+ struct obdo **obdos, obd_count *oa_bufs,
+ struct page **pages, char **bufs, obd_size *counts,
+ obd_off *offsets, obd_flag *flags);
+void ll_truncate(struct inode *inode);
+
+/* super.c */
+extern long ll_cache_count;
+extern long ll_mutex_start;
+
+/* symlink.c */
+extern struct inode_operations ll_fast_symlink_inode_operations;
+extern struct inode_operations ll_symlink_inode_operations;
+
+/* sysctl.c */
+void ll_sysctl_init(void);
+void ll_sysctl_clean(void);
+
+static inline struct ll_sb_info *ll_i2sbi(struct inode *inode)
+{
+ return (struct ll_sb_info *) &(inode->i_sb->u.generic_sbp);
+}
+
+static inline struct list_head *ll_iplist(struct inode *inode)
+{
+ struct ll_inode_info *info = ll_i2info(inode);
+
+ return &info->lli_pages;
+}
+
+static inline struct list_head *ll_islist(struct inode *inode)
+{
+ struct ll_inode_info *info = ll_i2info(inode);
+
+ return &info->lli_inodes;
+}
+
+static inline struct list_head *ll_slist(struct inode *inode)
+{
+ struct ll_sb_info *sbi = ll_i2sbi(inode);
+
+ return &sbi->ll_inodes;
+}
+
+static void inline ll_set_size (struct inode *inode, obd_size size)
+{
+ inode->i_size = size;
+ inode->i_blocks = (inode->i_size + inode->i_sb->s_blocksize - 1) >>
+ inode->i_sb->s_blocksize_bits;
+} /* ll_set_size */
+
+
+
+#define obd_down(mutex) { \
+ /* CDEBUG(D_INFO, "get lock\n"); */ \
+ ll_mutex_start = jiffies; \
+ down(mutex); \
+ if (jiffies - ll_mutex_start) \
+ CDEBUG(D_CACHE, "waited on mutex %ld jiffies\n", \
+ jiffies - ll_mutex_start); \
+}
+
+#define obd_up(mutex) { \
+ up(mutex); \
+ if (jiffies - ll_mutex_start > 1) \
+ CDEBUG(D_CACHE, "held mutex for %ld jiffies\n", \
+ jiffies - ll_mutex_start); \
+ /* CDEBUG(D_INFO, "free lock\n"); */ \
+}
+
+/* We track if a page has been added to the OBD page cache by stting a
+ * flag on the page. We have chosen a bit that will hopefully not be
+ * used for a while.
+ */
+#define PG_obdcache 29
+#define OBDAddCachePage(page) test_and_set_bit(PG_obdcache, &(page)->flags)
+#define OBDClearCachePage(page) clear_bit(PG_obdcache, &(page)->flags)
+
+static inline void ll_print_plist(struct inode *inode)
+{
+ struct list_head *page_list = ll_iplist(inode);
+ struct list_head *tmp;
+
+ CDEBUG(D_INFO, "inode %ld: page", inode->i_ino);
+ /* obd_down(&ll_i2sbi(inode)->ll_list_mutex); */
+ if (list_empty(page_list)) {
+ CDEBUG(D_INFO, " list empty\n");
+ obd_up(&ll_i2sbi(inode)->ll_list_mutex);
+ return;
+ }
+
+ tmp = page_list;
+ while ( (tmp = tmp->next) != page_list) {
+ struct ll_pgrq *pgrq;
+ pgrq = list_entry(tmp, struct ll_pgrq, rq_plist);
+ CDEBUG(D_INFO, " %p", pgrq->rq_page);
+ }
+ CDEBUG(D_INFO, "\n");
+ /* obd_up(&ll_i2sbi(inode)->ll_list_mutex); */
+}
+#include <linux/obdo.h>
+
+#endif
+
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