#include <linux/obd_class.h>
#include <linux/list.h>
+
+#define obd_unlock_page(page) do { if (PageLocked(page)) { \
+ UnlockPage(page);\
+ } else {\
+ printk("file %s, line %d: expecting locked page\n",\
+ __FILE__, __LINE__); \
+ } \
+} while(0)
+
struct obdfs_pgrq {
- struct list_head rq_plist; /* linked list of req's */
- unsigned long rq_jiffies;
- struct page *rq_page; /* page to be written */
+ struct list_head rq_plist; /* linked list of req's */
+ unsigned long rq_jiffies;
+ struct page *rq_page; /* page to be written */
};
-struct list_head obdfs_super_list; /* list of all OBDFS superblocks */
+struct list_head obdfs_super_list; /* list of all OBDFS superblocks */
struct obdfs_sb_info {
- struct list_head osi_list; /* list of supers */
- struct obd_conn osi_conn;
- struct super_block *osi_super;
- struct obd_device *osi_obd;
- struct obd_ops *osi_ops;
- ino_t osi_rootino; /* number of root inode */
- int osi_minor; /* minor of /dev/obdX */
- struct list_head osi_inodes; /* list of dirty inodes */
- unsigned long osi_cache_count;
- struct semaphore osi_list_mutex;
+ struct list_head osi_list; /* list of supers */
+ struct obd_conn osi_conn;
+ struct super_block *osi_super;
+ struct obd_device *osi_obd;
+ struct obd_ops *osi_ops;
+ ino_t osi_rootino; /* number of root inode */
+ int osi_minor; /* minor of /dev/obdX */
+ struct list_head osi_inodes; /* list of dirty inodes */
+ unsigned long osi_cache_count;
+ struct semaphore osi_list_mutex;
};
struct obdfs_inode_info {
- int oi_flags;
- struct list_head oi_inodes;
- struct list_head oi_pages;
- char oi_inline[OBD_INLINESZ];
+ int oi_flags;
+ struct list_head oi_inodes;
+ struct list_head oi_pages;
+ char oi_inline[OBD_INLINESZ];
};
/* 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
+struct ext2_dir_entry_2 {
+ __u32 inode; /* Inode number */
+ __u16 rec_len; /* Directory entry length */
+ __u8 name_len; /* Name length */
+ __u8 file_type;
+ char name[EXT2_NAME_LEN]; /* File name */
+};
int obdfs_check_dir_entry (const char * function, struct inode * dir,
- struct ext2_dir_entry_2 * de, struct page * page,
- unsigned long offset);
+ struct ext2_dir_entry_2 * de, struct page * page,
+ unsigned long offset);
extern struct file_operations obdfs_dir_operations;
extern struct inode_operations obdfs_dir_inode_operations;
int obdfs_flush_dirty_pages(unsigned long check_time);
/* namei.c */
+/*
+ * Structure of the super block
+ */
+struct ext2_super_block {
+ __u32 s_inodes_count; /* Inodes count */
+ __u32 s_blocks_count; /* Blocks count */
+ __u32 s_r_blocks_count; /* Reserved blocks count */
+ __u32 s_free_blocks_count; /* Free blocks count */
+ __u32 s_free_inodes_count; /* Free inodes count */
+ __u32 s_first_data_block; /* First Data Block */
+ __u32 s_log_block_size; /* Block size */
+ __s32 s_log_frag_size; /* Fragment size */
+ __u32 s_blocks_per_group; /* # Blocks per group */
+ __u32 s_frags_per_group; /* # Fragments per group */
+ __u32 s_inodes_per_group; /* # Inodes per group */
+ __u32 s_mtime; /* Mount time */
+ __u32 s_wtime; /* Write time */
+ __u16 s_mnt_count; /* Mount count */
+ __s16 s_max_mnt_count; /* Maximal mount count */
+ __u16 s_magic; /* Magic signature */
+ __u16 s_state; /* File system state */
+ __u16 s_errors; /* Behaviour when detecting errors */
+ __u16 s_minor_rev_level; /* minor revision level */
+ __u32 s_lastcheck; /* time of last check */
+ __u32 s_checkinterval; /* max. time between checks */
+ __u32 s_creator_os; /* OS */
+ __u32 s_rev_level; /* Revision level */
+ __u16 s_def_resuid; /* Default uid for reserved blocks */
+ __u16 s_def_resgid; /* Default gid for reserved blocks */
+ /*
+ * These fields are for EXT2_DYNAMIC_REV superblocks only.
+ *
+ * Note: the difference between the compatible feature set and
+ * the incompatible feature set is that if there is a bit set
+ * in the incompatible feature set that the kernel doesn't
+ * know about, it should refuse to mount the filesystem.
+ *
+ * e2fsck's requirements are more strict; if it doesn't know
+ * about a feature in either the compatible or incompatible
+ * feature set, it must abort and not try to meddle with
+ * things it doesn't understand...
+ */
+ __u32 s_first_ino; /* First non-reserved inode */
+ __u16 s_inode_size; /* size of inode structure */
+ __u16 s_block_group_nr; /* block group # of this superblock */
+ __u32 s_feature_compat; /* compatible feature set */
+ __u32 s_feature_incompat; /* incompatible feature set */
+ __u32 s_feature_ro_compat; /* readonly-compatible feature set */
+ __u8 s_uuid[16]; /* 128-bit uuid for volume */
+ char s_volume_name[16]; /* volume name */
+ char s_last_mounted[64]; /* directory where last mounted */
+ __u32 s_algorithm_usage_bitmap; /* For compression */
+ /*
+ * Performance hints. Directory preallocation should only
+ * happen if the EXT2_COMPAT_PREALLOC flag is on.
+ */
+ __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/
+ __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */
+ __u16 s_padding1;
+ __u32 s_reserved[204]; /* Padding to the end of the 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) )
+
+
struct dentry *obdfs_lookup(struct inode * dir, struct dentry *dentry);
int obdfs_create (struct inode * dir, struct dentry * dentry, int mode);
int obdfs_mkdir(struct inode *dir, struct dentry *dentry, int mode);
int obdfs_unlink(struct inode *dir, struct dentry *dentry);
int obdfs_mknod(struct inode *dir, struct dentry *dentry, int mode, int rdev);
int obdfs_symlink(struct inode *dir, struct dentry *dentry,
- const char *symname);
+ const char *symname);
int obdfs_link(struct dentry *old_dentry, struct inode *dir,
- struct dentry *dentry);
+ struct dentry *dentry);
int obdfs_rename(struct inode *old_dir, struct dentry *old_dentry,
- struct inode *new_dir, struct dentry *new_dentry);
+ struct inode *new_dir, struct dentry *new_dentry);
/* rw.c */
-int obdfs_do_writepage(struct inode *, struct page *, int sync);
+int obdfs_do_writepage(struct page *, int sync);
int obdfs_init_pgrqcache(void);
void obdfs_cleanup_pgrqcache(void);
inline void obdfs_pgrq_del(struct obdfs_pgrq *pgrq);
-int obdfs_readpage(struct dentry *dentry, struct page *page);
-int obdfs_writepage(struct dentry *dentry, struct page *page);
+int obdfs_readpage(struct file *file, struct page *page);
+int obdfs_writepage(struct page *page);
struct page *obdfs_getpage(struct inode *inode, unsigned long offset,
- int create, int locked);
+ int create, int locked);
int obdfs_write_one_page(struct file *file, struct page *page,
- unsigned long offset, unsigned long bytes,
- const char * buf);
+ unsigned long offset, unsigned long bytes,
+ const char * buf);
int obdfs_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);
+ struct obdo **obdos, obd_count *oa_bufs,
+ struct page **pages, char **bufs, obd_size *counts,
+ obd_off *offsets, obd_flag *flags);
void obdfs_truncate(struct inode *inode);
/* super.c */
static inline struct obdfs_inode_info *obdfs_i2info(struct inode *inode)
{
- return (struct obdfs_inode_info *)&(inode->u.generic_ip);
+ return (struct obdfs_inode_info *)&(inode->u.generic_ip);
}
static inline struct obdfs_sb_info *obdfs_i2sbi(struct inode *inode)
{
- return (struct obdfs_sb_info *) &(inode->i_sb->u.generic_sbp);
+ return (struct obdfs_sb_info *) &(inode->i_sb->u.generic_sbp);
}
static inline struct list_head *obdfs_iplist(struct inode *inode)
{
- struct obdfs_inode_info *info = obdfs_i2info(inode);
+ struct obdfs_inode_info *info = obdfs_i2info(inode);
- return &info->oi_pages;
+ return &info->oi_pages;
}
static inline struct list_head *obdfs_islist(struct inode *inode)
{
- struct obdfs_inode_info *info = obdfs_i2info(inode);
+ struct obdfs_inode_info *info = obdfs_i2info(inode);
- return &info->oi_inodes;
+ return &info->oi_inodes;
}
static inline struct list_head *obdfs_slist(struct inode *inode)
{
- struct obdfs_sb_info *sbi = obdfs_i2sbi(inode);
+ struct obdfs_sb_info *sbi = obdfs_i2sbi(inode);
- return &sbi->osi_inodes;
+ return &sbi->osi_inodes;
}
-#define obd_down(mutex) { \
- /* CDEBUG(D_INFO, "get lock\n"); */ \
- obdfs_mutex_start = jiffies; \
- down(mutex); \
- if (jiffies - obdfs_mutex_start) \
- CDEBUG(D_CACHE, "waited on mutex %ld jiffies\n", \
- jiffies - obdfs_mutex_start); \
+#define obd_down(mutex) { \
+ /* CDEBUG(D_INFO, "get lock\n"); */ \
+ obdfs_mutex_start = jiffies; \
+ down(mutex); \
+ if (jiffies - obdfs_mutex_start) \
+ CDEBUG(D_CACHE, "waited on mutex %ld jiffies\n", \
+ jiffies - obdfs_mutex_start); \
}
-#define obd_up(mutex) { \
- up(mutex); \
- if (jiffies - obdfs_mutex_start > 1) \
- CDEBUG(D_CACHE, "held mutex for %ld jiffies\n", \
- jiffies - obdfs_mutex_start); \
- /* CDEBUG(D_INFO, "free lock\n"); */ \
+#define obd_up(mutex) { \
+ up(mutex); \
+ if (jiffies - obdfs_mutex_start > 1) \
+ CDEBUG(D_CACHE, "held mutex for %ld jiffies\n", \
+ jiffies - obdfs_mutex_start); \
+ /* CDEBUG(D_INFO, "free lock\n"); */ \
}
/* We track if a page has been added to the OBD page cache by stting a
* 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)
+#define OBDAddCachePage(page) test_and_set_bit(PG_obdcache, &(page)->flags)
+#define OBDClearCachePage(page) clear_bit(PG_obdcache, &(page)->flags)
static inline void obdfs_print_plist(struct inode *inode)
{
- struct list_head *page_list = obdfs_iplist(inode);
- struct list_head *tmp;
-
- CDEBUG(D_INFO, "inode %ld: page", inode->i_ino);
- /* obd_down(&obdfs_i2sbi(inode)->osi_list_mutex); */
- if (list_empty(page_list)) {
- CDEBUG(D_INFO, " list empty\n");
- obd_up(&obdfs_i2sbi(inode)->osi_list_mutex);
- return;
- }
-
- tmp = page_list;
- while ( (tmp = tmp->next) != page_list) {
- struct obdfs_pgrq *pgrq;
- pgrq = list_entry(tmp, struct obdfs_pgrq, rq_plist);
- CDEBUG(D_INFO, " %p", pgrq->rq_page);
- }
- CDEBUG(D_INFO, "\n");
- /* obd_up(&obdfs_i2sbi(inode)->osi_list_mutex); */
+ struct list_head *page_list = obdfs_iplist(inode);
+ struct list_head *tmp;
+
+ CDEBUG(D_INFO, "inode %ld: page", inode->i_ino);
+ /* obd_down(&obdfs_i2sbi(inode)->osi_list_mutex); */
+ if (list_empty(page_list)) {
+ CDEBUG(D_INFO, " list empty\n");
+ obd_up(&obdfs_i2sbi(inode)->osi_list_mutex);
+ return;
+ }
+
+ tmp = page_list;
+ while ( (tmp = tmp->next) != page_list) {
+ struct obdfs_pgrq *pgrq;
+ pgrq = list_entry(tmp, struct obdfs_pgrq, rq_plist);
+ CDEBUG(D_INFO, " %p", pgrq->rq_page);
+ }
+ CDEBUG(D_INFO, "\n");
+ /* obd_up(&obdfs_i2sbi(inode)->osi_list_mutex); */
}
static inline int obdfs_has_inline(struct inode *inode)
{
- return (obdfs_i2info(inode)->oi_flags & OBD_FL_INLINEDATA);
+ return (obdfs_i2info(inode)->oi_flags & OBD_FL_INLINEDATA);
}
static void inline obdfs_from_inode(struct obdo *oa, struct inode *inode)
{
- struct obdfs_inode_info *oinfo = obdfs_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 (obdfs_has_inline(inode)) {
- CDEBUG(D_INODE, "copying inline data from inode to obdo\n");
- memcpy(oa->o_inline, oinfo->oi_inline, OBD_INLINESZ);
- oa->o_obdflags |= OBD_FL_INLINEDATA;
- oa->o_valid |= OBD_MD_FLINLINE;
- }
+ struct obdfs_inode_info *oinfo = obdfs_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 (obdfs_has_inline(inode)) {
+ CDEBUG(D_INODE, "copying inline data from inode to obdo\n");
+ memcpy(oa->o_inline, oinfo->oi_inline, OBD_INLINESZ);
+ oa->o_obdflags |= OBD_FL_INLINEDATA;
+ oa->o_valid |= OBD_MD_FLINLINE;
+ }
} /* obdfs_from_inode */
static void inline obdfs_to_inode(struct inode *inode, struct obdo *oa)
{
- struct obdfs_inode_info *oinfo = obdfs_i2info(inode);
+ struct obdfs_inode_info *oinfo = obdfs_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);
+ 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);
+ obdo_to_inode(inode, oa);
- if (obdo_has_inline(oa)) {
- CDEBUG(D_INODE, "copying inline data from obdo to inode\n");
- memcpy(oinfo->oi_inline, oa->o_inline, OBD_INLINESZ);
- oinfo->oi_flags |= OBD_FL_INLINEDATA;
- }
+ if (obdo_has_inline(oa)) {
+ CDEBUG(D_INODE, "copying inline data from obdo to inode\n");
+ memcpy(oinfo->oi_inline, oa->o_inline, OBD_INLINESZ);
+ oinfo->oi_flags |= OBD_FL_INLINEDATA;
+ }
} /* obdfs_to_inode */
#define NOLOCK 0
git://git.whamcloud.com / fs / lustre-release.git / blobdiff