From 88886a921cfd732cef1e6491a892d5c4d3a96f36 Mon Sep 17 00:00:00 2001 From: eeb Date: Thu, 5 Dec 2002 14:22:14 +0000 Subject: [PATCH] Added PNNL ia64 kernel patch --- lustre/patches/patch-2.4.18-hp1_pnnl18.2.8qsnet | 1673 +++++++++++++++++++++++ 1 file changed, 1673 insertions(+) create mode 100644 lustre/patches/patch-2.4.18-hp1_pnnl18.2.8qsnet diff --git a/lustre/patches/patch-2.4.18-hp1_pnnl18.2.8qsnet b/lustre/patches/patch-2.4.18-hp1_pnnl18.2.8qsnet new file mode 100644 index 0000000..356cc37 --- /dev/null +++ b/lustre/patches/patch-2.4.18-hp1_pnnl18.2.8qsnet @@ -0,0 +1,1673 @@ +--- linux-pristine/./include/linux/lustre_version.h Wed Dec 31 19:00:00 1969 ++++ linux/./include/linux/lustre_version.h Tue Nov 26 07:02:14 2002 +@@ -0,0 +1 @@ ++#define LUSTRE_KERNEL_VERSION 3 +--- linux-pristine/./arch/ia64/mm/init.c Thu Dec 5 10:47:25 2002 ++++ linux/./arch/ia64/mm/init.c Fri Nov 29 18:06:20 2002 +@@ -44,6 +44,12 @@ + + static struct page *vmem_map; + ++struct page *check_get_page(unsigned long kaddr) ++{ ++#warning FIXME: Lustre team, is this solid? ++ return virt_to_page(kaddr); ++} ++ + int + do_check_pgt_cache (int low, int high) + { +--- linux-pristine/./arch/i386/mm/init.c Thu Dec 5 10:47:24 2002 ++++ linux/./arch/i386/mm/init.c Fri Nov 29 18:06:20 2002 +@@ -43,6 +43,12 @@ + static unsigned long totalram_pages; + static unsigned long totalhigh_pages; + ++struct page *check_get_page(unsigned long kaddr) ++{ ++#warning FIXME: Lustre team, is this solid? ++ return virt_to_page(kaddr); ++} ++ + int do_check_pgt_cache(int low, int high) + { + int freed = 0; +--- linux-pristine/./drivers/block/blkpg.c Thu Dec 5 10:47:36 2002 ++++ linux/./drivers/block/blkpg.c Fri Nov 29 18:08:05 2002 +@@ -308,6 +308,41 @@ + + EXPORT_SYMBOL(blk_ioctl); + ++#define NUM_DEV_NO_WRITE 16 ++static int dev_no_write[NUM_DEV_NO_WRITE]; ++ ++/* ++ * Debug code for turning block devices "read-only" (will discard writes ++ * silently). This is for filesystem crash/recovery testing. ++ */ ++void dev_set_rdonly(kdev_t dev, int no_write) ++{ ++ if (dev) { ++ printk(KERN_WARNING "Turning device %s read-only\n", ++ bdevname(dev)); ++ dev_no_write[no_write] = 0xdead0000 + dev; ++ } ++} ++ ++int dev_check_rdonly(kdev_t dev) { ++ int i; ++ ++ for (i = 0; i < NUM_DEV_NO_WRITE; i++) { ++ if ((dev_no_write[i] & 0xffff0000) == 0xdead0000 && ++ dev == (dev_no_write[i] & 0xffff)) ++ return 1; ++ } ++ return 0; ++} ++ ++void dev_clear_rdonly(int no_write) { ++ dev_no_write[no_write] = 0; ++} ++ ++EXPORT_SYMBOL(dev_set_rdonly); ++EXPORT_SYMBOL(dev_check_rdonly); ++EXPORT_SYMBOL(dev_clear_rdonly); ++ + /********************* + * get_last_sector() + * +--- linux-pristine/./drivers/block/loop.c Thu Dec 5 10:47:37 2002 ++++ linux/./drivers/block/loop.c Fri Nov 29 18:06:20 2002 +@@ -471,6 +471,11 @@ + spin_unlock_irq(&lo->lo_lock); + + if (rw == WRITE) { ++#ifdef CONFIG_DEV_RDONLY ++ if (dev_check_rdonly(rbh->b_rdev)) ++ goto err; ++#endif ++ + if (lo->lo_flags & LO_FLAGS_READ_ONLY) + goto err; + } else if (rw == READA) { +--- linux-pristine/./drivers/ide/ide-disk.c Thu Dec 5 10:47:59 2002 ++++ linux/./drivers/ide/ide-disk.c Fri Nov 29 18:06:20 2002 +@@ -367,6 +367,12 @@ + */ + static ide_startstop_t do_rw_disk (ide_drive_t *drive, struct request *rq, unsigned long block) + { ++#ifdef CONFIG_DEV_RDONLY ++ if (rq->cmd == WRITE && dev_check_rdonly(rq->rq_dev)) { ++ ide_end_request(1, HWGROUP(drive)); ++ return ide_stopped; ++ } ++#endif + if (IDE_CONTROL_REG) + OUT_BYTE(drive->ctl,IDE_CONTROL_REG); + OUT_BYTE(0x00, IDE_FEATURE_REG); +--- linux-pristine/./fs/ext3/Makefile Thu Dec 5 10:49:13 2002 ++++ linux/./fs/ext3/Makefile Fri Nov 29 18:06:20 2002 +@@ -9,6 +9,8 @@ + + O_TARGET := ext3.o + ++export-objs := super.o ++ + obj-y := balloc.o bitmap.o dir.o file.o fsync.o ialloc.o inode.o \ + ioctl.o namei.o super.o symlink.o + obj-m := $(O_TARGET) +--- linux-pristine/./fs/ext3/super.c Thu Dec 5 10:49:13 2002 ++++ linux/./fs/ext3/super.c Fri Nov 29 18:06:20 2002 +@@ -1744,7 +1744,7 @@ + unregister_filesystem(&ext3_fs_type); + } + +-EXPORT_NO_SYMBOLS; ++EXPORT_SYMBOL(ext3_bread); + + MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); + MODULE_DESCRIPTION("Second Extended Filesystem with journaling extensions"); +--- linux-pristine/./fs/jbd/commit.c Thu Dec 5 10:49:15 2002 ++++ linux/./fs/jbd/commit.c Fri Nov 29 18:06:20 2002 +@@ -475,7 +475,7 @@ + transaction's t_log_list queue, and metadata buffers are on + the t_iobuf_list queue. + +- Wait for the transactions in reverse order. That way we are ++ Wait for the buffers in reverse order. That way we are + less likely to be woken up until all IOs have completed, and + so we incur less scheduling load. + */ +@@ -566,8 +566,10 @@ + + jbd_debug(3, "JBD: commit phase 6\n"); + +- if (is_journal_aborted(journal)) ++ if (is_journal_aborted(journal)) { ++ unlock_journal(journal); + goto skip_commit; ++ } + + /* Done it all: now write the commit record. We should have + * cleaned up our previous buffers by now, so if we are in abort +@@ -577,6 +579,7 @@ + descriptor = journal_get_descriptor_buffer(journal); + if (!descriptor) { + __journal_abort_hard(journal); ++ unlock_journal(journal); + goto skip_commit; + } + +@@ -600,7 +603,6 @@ + put_bh(bh); /* One for getblk() */ + journal_unlock_journal_head(descriptor); + } +- lock_journal(journal); + + /* End of a transaction! Finally, we can do checkpoint + processing: any buffers committed as a result of this +@@ -609,6 +611,25 @@ + + skip_commit: + ++ /* Call any callbacks that had been registered for handles in this ++ * transaction. It is up to the callback to free any allocated ++ * memory. ++ */ ++ if (!list_empty(&commit_transaction->t_jcb)) { ++ struct list_head *p, *n; ++ int error = is_journal_aborted(journal); ++ ++ list_for_each_safe(p, n, &commit_transaction->t_jcb) { ++ struct journal_callback *jcb; ++ ++ jcb = list_entry(p, struct journal_callback, jcb_list); ++ list_del(p); ++ jcb->jcb_func(jcb, error); ++ } ++ } ++ ++ lock_journal(journal); ++ + jbd_debug(3, "JBD: commit phase 7\n"); + + J_ASSERT(commit_transaction->t_sync_datalist == NULL); +--- linux-pristine/./fs/jbd/journal.c Thu Dec 5 10:49:15 2002 ++++ linux/./fs/jbd/journal.c Fri Nov 29 18:06:20 2002 +@@ -58,6 +58,7 @@ + #endif + EXPORT_SYMBOL(journal_flush); + EXPORT_SYMBOL(journal_revoke); ++EXPORT_SYMBOL(journal_callback_set); + + EXPORT_SYMBOL(journal_init_dev); + EXPORT_SYMBOL(journal_init_inode); +--- linux-pristine/./fs/jbd/transaction.c Thu Dec 5 10:49:15 2002 ++++ linux/./fs/jbd/transaction.c Fri Nov 29 18:06:20 2002 +@@ -57,6 +57,7 @@ + transaction->t_state = T_RUNNING; + transaction->t_tid = journal->j_transaction_sequence++; + transaction->t_expires = jiffies + journal->j_commit_interval; ++ INIT_LIST_HEAD(&transaction->t_jcb); + + /* Set up the commit timer for the new transaction. */ + J_ASSERT (!journal->j_commit_timer_active); +@@ -201,6 +202,20 @@ + return 0; + } + ++/* Allocate a new handle. This should probably be in a slab... */ ++static handle_t *new_handle(int nblocks) ++{ ++ handle_t *handle = jbd_kmalloc(sizeof (handle_t), GFP_NOFS); ++ if (!handle) ++ return NULL; ++ memset(handle, 0, sizeof (handle_t)); ++ handle->h_buffer_credits = nblocks; ++ handle->h_ref = 1; ++ INIT_LIST_HEAD(&handle->h_jcb); ++ ++ return handle; ++} ++ + /* + * Obtain a new handle. + * +@@ -227,14 +242,11 @@ + handle->h_ref++; + return handle; + } +- +- handle = jbd_kmalloc(sizeof (handle_t), GFP_NOFS); ++ ++ handle = new_handle(nblocks); + if (!handle) + return ERR_PTR(-ENOMEM); +- memset (handle, 0, sizeof (handle_t)); + +- handle->h_buffer_credits = nblocks; +- handle->h_ref = 1; + current->journal_info = handle; + + err = start_this_handle(journal, handle); +@@ -333,14 +345,11 @@ + + if (is_journal_aborted(journal)) + return ERR_PTR(-EIO); +- +- handle = jbd_kmalloc(sizeof (handle_t), GFP_NOFS); ++ ++ handle = new_handle(nblocks); + if (!handle) + return ERR_PTR(-ENOMEM); +- memset (handle, 0, sizeof (handle_t)); + +- handle->h_buffer_credits = nblocks; +- handle->h_ref = 1; + current->journal_info = handle; + + err = try_start_this_handle(journal, handle); +@@ -1328,6 +1337,28 @@ + #endif + + /* ++ * Register a callback function for this handle. The function will be ++ * called when the transaction that this handle is part of has been ++ * committed to disk with the original callback data struct and the ++ * error status of the journal as parameters. There is no guarantee of ++ * ordering between handles within a single transaction, nor between ++ * callbacks registered on the same handle. ++ * ++ * The caller is responsible for allocating the journal_callback struct. ++ * This is to allow the caller to add as much extra data to the callback ++ * as needed, but reduce the overhead of multiple allocations. The caller ++ * allocated struct must start with a struct journal_callback at offset 0, ++ * and has the caller-specific data afterwards. ++ */ ++void journal_callback_set(handle_t *handle, ++ void (*func)(struct journal_callback *jcb, int error), ++ struct journal_callback *jcb) ++{ ++ list_add(&jcb->jcb_list, &handle->h_jcb); ++ jcb->jcb_func = func; ++} ++ ++/* + * All done for a particular handle. + * + * There is not much action needed here. We just return any remaining +@@ -1393,7 +1424,10 @@ + wake_up(&journal->j_wait_transaction_locked); + } + +- /* ++ /* Move callbacks from the handle to the transaction. */ ++ list_splice(&handle->h_jcb, &transaction->t_jcb); ++ ++ /* + * If the handle is marked SYNC, we need to set another commit + * going! We also want to force a commit if the current + * transaction is occupying too much of the log, or if the +--- linux-pristine/./include/linux/blkdev.h Thu Dec 5 10:49:41 2002 ++++ linux/./include/linux/blkdev.h Fri Nov 29 18:30:34 2002 +@@ -228,4 +228,8 @@ + return retval; + } + ++#define CONFIG_DEV_RDONLY ++void dev_set_rdonly(kdev_t, int); ++int dev_check_rdonly(kdev_t); ++void dev_clear_rdonly(int); + #endif +--- linux-pristine/./include/linux/slab.h Thu Dec 5 10:49:53 2002 ++++ linux/./include/linux/slab.h Fri Nov 29 18:30:15 2002 +@@ -58,6 +58,7 @@ + extern void *kmem_cache_alloc(kmem_cache_t *, int); + extern void *kmem_cache_zalloc(kmem_cache_t *, int); + extern void kmem_cache_free(kmem_cache_t *, void *); ++extern int kmem_cache_validate(kmem_cache_t *cachep, void *objp); + + extern void *kmalloc(size_t, int); + extern void kfree(const void *); +--- linux-pristine/./include/linux/jbd.h Thu Dec 5 10:49:43 2002 ++++ linux/./include/linux/jbd.h Fri Nov 29 18:50:01 2002 +@@ -249,6 +249,13 @@ + return bh->b_private; + } + ++#define HAVE_JOURNAL_CALLBACK_STATUS ++struct journal_callback { ++ struct list_head jcb_list; ++ void (*jcb_func)(struct journal_callback *jcb, int error); ++ /* user data goes here */ ++}; ++ + struct jbd_revoke_table_s; + + /* The handle_t type represents a single atomic update being performed +@@ -279,6 +286,12 @@ + operations */ + int h_err; + ++ /* List of application registered callbacks for this handle. ++ * The function(s) will be called after the transaction that ++ * this handle is part of has been committed to disk. ++ */ ++ struct list_head h_jcb; ++ + /* Flags */ + unsigned int h_sync: 1; /* sync-on-close */ + unsigned int h_jdata: 1; /* force data journaling */ +@@ -398,6 +411,10 @@ + + /* How many handles used this transaction? */ + int t_handle_count; ++ ++ /* List of registered callback functions for this transaction. ++ * Called when the transaction is committed. */ ++ struct list_head t_jcb; + }; + + +@@ -646,6 +663,9 @@ + extern int journal_try_to_free_buffers(journal_t *, struct page *, int); + extern int journal_stop(handle_t *); + extern int journal_flush (journal_t *); ++extern void journal_callback_set(handle_t *handle, ++ void (*fn)(struct journal_callback *,int), ++ struct journal_callback *jcb); + + extern void journal_lock_updates (journal_t *); + extern void journal_unlock_updates (journal_t *); +--- linux-pristine/./kernel/ksyms.c Thu Dec 5 10:50:01 2002 ++++ linux/./kernel/ksyms.c Fri Nov 29 18:37:23 2002 +@@ -271,6 +271,7 @@ + EXPORT_SYMBOL(set_page_dirty); + EXPORT_SYMBOL(vfs_readlink); + EXPORT_SYMBOL(vfs_follow_link); ++EXPORT_SYMBOL(vfs_follow_link_it); + EXPORT_SYMBOL(page_readlink); + EXPORT_SYMBOL(page_follow_link); + EXPORT_SYMBOL(page_symlink_inode_operations); +@@ -285,6 +286,11 @@ + EXPORT_SYMBOL(nr_free_pages); + EXPORT_SYMBOL(page_cache_size); + ++/* lustre */ ++EXPORT_SYMBOL(pagecache_lock); ++EXPORT_SYMBOL(do_kern_mount); ++EXPORT_SYMBOL(kmem_cache_validate); ++ + /* for stackable file systems (lofs, wrapfs, cryptfs, etc.) */ + EXPORT_SYMBOL(default_llseek); + EXPORT_SYMBOL(dentry_open); +--- linux-pristine/./include/linux/dcache.h Thu Dec 5 10:49:42 2002 ++++ linux/./include/linux/dcache.h Fri Nov 29 18:30:11 2002 +@@ -6,6 +6,34 @@ + #include + #include + ++#define IT_OPEN (1) ++#define IT_CREAT (1<<1) ++#define IT_MKDIR (1<<2) ++#define IT_LINK (1<<3) ++#define IT_LINK2 (1<<4) ++#define IT_SYMLINK (1<<5) ++#define IT_UNLINK (1<<6) ++#define IT_RMDIR (1<<7) ++#define IT_RENAME (1<<8) ++#define IT_RENAME2 (1<<9) ++#define IT_READDIR (1<<10) ++#define IT_GETATTR (1<<11) ++#define IT_SETATTR (1<<12) ++#define IT_READLINK (1<<13) ++#define IT_MKNOD (1<<14) ++#define IT_LOOKUP (1<<15) ++ ++struct lookup_intent { ++ int it_op; ++ int it_mode; ++ int it_disposition; ++ int it_status; ++ struct iattr *it_iattr; ++ __u64 it_lock_handle[2]; ++ int it_lock_mode; ++ void *it_data; ++}; ++ + /* + * linux/include/linux/dcache.h + * +@@ -78,6 +106,7 @@ + unsigned long d_time; /* used by d_revalidate */ + struct dentry_operations *d_op; + struct super_block * d_sb; /* The root of the dentry tree */ ++ struct lookup_intent *d_it; + unsigned long d_vfs_flags; + void * d_fsdata; /* fs-specific data */ + unsigned char d_iname[DNAME_INLINE_LEN]; /* small names */ +@@ -90,6 +119,8 @@ + int (*d_delete)(struct dentry *); + void (*d_release)(struct dentry *); + void (*d_iput)(struct dentry *, struct inode *); ++ int (*d_revalidate2)(struct dentry *, int, struct lookup_intent *); ++ void (*d_intent_release)(struct dentry *, struct lookup_intent *); + }; + + /* the dentry parameter passed to d_hash and d_compare is the parent +--- linux-pristine/./include/linux/fs.h Thu Dec 5 10:49:42 2002 ++++ linux/./include/linux/fs.h Fri Nov 29 18:30:15 2002 +@@ -588,6 +588,7 @@ + + /* needed for tty driver, and maybe others */ + void *private_data; ++ struct lookup_intent *f_intent; + + /* preallocated helper kiobuf to speedup O_DIRECT */ + struct kiobuf *f_iobuf; +@@ -849,7 +850,9 @@ + extern int vfs_link(struct dentry *, struct inode *, struct dentry *); + extern int vfs_rmdir(struct inode *, struct dentry *); + extern int vfs_unlink(struct inode *, struct dentry *); +-extern int vfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *); ++int vfs_rename(struct inode *old_dir, struct dentry *old_dentry, ++ struct inode *new_dir, struct dentry *new_dentry, ++ struct lookup_intent *it); + + /* + * File types +@@ -911,6 +914,7 @@ + struct inode_operations { + int (*create) (struct inode *,struct dentry *,int); + struct dentry * (*lookup) (struct inode *,struct dentry *); ++ struct dentry * (*lookup2) (struct inode *,struct dentry *, struct lookup_intent *); + int (*link) (struct dentry *,struct inode *,struct dentry *); + int (*unlink) (struct inode *,struct dentry *); + int (*symlink) (struct inode *,struct dentry *,const char *); +@@ -921,6 +925,8 @@ + struct inode *, struct dentry *); + int (*readlink) (struct dentry *, char *,int); + int (*follow_link) (struct dentry *, struct nameidata *); ++ int (*follow_link2) (struct dentry *, struct nameidata *, ++ struct lookup_intent *it); + void (*truncate) (struct inode *); + int (*permission) (struct inode *, int); + int (*revalidate) (struct dentry *); +@@ -1063,7 +1069,7 @@ + extern struct vfsmount *kern_mount(struct file_system_type *); + extern int may_umount(struct vfsmount *); + extern long do_mount(char *, char *, char *, unsigned long, void *); +- ++struct vfsmount *do_kern_mount(char *type, int flags, char *name, void *data); + #define kern_umount mntput + + extern int vfs_statfs(struct super_block *, struct statfs *); +@@ -1387,6 +1393,7 @@ + extern loff_t default_llseek(struct file *file, loff_t offset, int origin); + + extern int FASTCALL(__user_walk(const char *, unsigned, struct nameidata *)); ++extern int FASTCALL(__user_walk_it(const char *, unsigned, struct nameidata *, struct lookup_intent *it)); + extern int FASTCALL(path_init(const char *, unsigned, struct nameidata *)); + extern int FASTCALL(path_walk(const char *, struct nameidata *)); + extern int FASTCALL(link_path_walk(const char *, struct nameidata *)); +@@ -1397,6 +1404,8 @@ + extern struct dentry * lookup_hash(struct qstr *, struct dentry *); + #define user_path_walk(name,nd) __user_walk(name, LOOKUP_FOLLOW|LOOKUP_POSITIVE, nd) + #define user_path_walk_link(name,nd) __user_walk(name, LOOKUP_POSITIVE, nd) ++#define user_path_walk_it(name,nd,it) __user_walk_it(name, LOOKUP_FOLLOW|LOOKUP_POSITIVE, nd, it) ++#define user_path_walk_link_it(name,nd,it) __user_walk_it(name, LOOKUP_POSITIVE, nd, it) + + extern void iput(struct inode *); + extern void force_delete(struct inode *); +@@ -1508,6 +1517,8 @@ + + extern int vfs_readlink(struct dentry *, char *, int, const char *); + extern int vfs_follow_link(struct nameidata *, const char *); ++extern int vfs_follow_link_it(struct nameidata *, const char *, ++ struct lookup_intent *it); + extern int page_readlink(struct dentry *, char *, int); + extern int page_follow_link(struct dentry *, struct nameidata *); + extern struct inode_operations page_symlink_inode_operations; +--- linux-pristine/./fs/dcache.c Thu Dec 5 10:49:13 2002 ++++ linux/./fs/dcache.c Fri Nov 29 18:06:20 2002 +@@ -617,6 +617,7 @@ + dentry->d_op = NULL; + dentry->d_fsdata = NULL; + dentry->d_mounted = 0; ++ dentry->d_it = NULL; + INIT_LIST_HEAD(&dentry->d_hash); + INIT_LIST_HEAD(&dentry->d_lru); + INIT_LIST_HEAD(&dentry->d_subdirs); +--- linux-pristine/./fs/nfsd/vfs.c Thu Dec 5 10:49:18 2002 ++++ linux/./fs/nfsd/vfs.c Fri Nov 29 18:06:20 2002 +@@ -1285,7 +1285,7 @@ + err = nfserr_perm; + } else + #endif +- err = vfs_rename(fdir, odentry, tdir, ndentry); ++ err = vfs_rename(fdir, odentry, tdir, ndentry, NULL); + if (!err && EX_ISSYNC(tfhp->fh_export)) { + nfsd_sync_dir(tdentry); + nfsd_sync_dir(fdentry); +--- linux-pristine/./fs/namei.c Thu Dec 5 10:49:16 2002 ++++ linux/./fs/namei.c Fri Nov 29 18:11:18 2002 +@@ -94,6 +94,12 @@ + * XEmacs seems to be relying on it... + */ + ++void intent_release(struct dentry *de, struct lookup_intent *it) ++{ ++ if (de->d_op && de->d_op->d_intent_release) ++ de->d_op->d_intent_release(de, it); ++} ++ + /* In order to reduce some races, while at the same time doing additional + * checking and hopefully speeding things up, we copy filenames to the + * kernel data space before using them.. +@@ -260,10 +266,19 @@ + * Internal lookup() using the new generic dcache. + * SMP-safe + */ +-static struct dentry * cached_lookup(struct dentry * parent, struct qstr * name, int flags) ++static struct dentry *cached_lookup(struct dentry *parent, struct qstr *name, ++ int flags, struct lookup_intent *it) + { + struct dentry * dentry = d_lookup(parent, name); + ++ if (dentry && dentry->d_op && dentry->d_op->d_revalidate2) { ++ if (!dentry->d_op->d_revalidate2(dentry, flags, it) && ++ !d_invalidate(dentry)) { ++ dput(dentry); ++ dentry = NULL; ++ } ++ return dentry; ++ } else + if (dentry && dentry->d_op && dentry->d_op->d_revalidate) { + if (!dentry->d_op->d_revalidate(dentry, flags) && !d_invalidate(dentry)) { + dput(dentry); +@@ -281,7 +296,8 @@ + * make sure that nobody added the entry to the dcache in the meantime.. + * SMP-safe + */ +-static struct dentry * real_lookup(struct dentry * parent, struct qstr * name, int flags) ++static struct dentry *real_lookup(struct dentry *parent, struct qstr *name, ++ int flags, struct lookup_intent *it) + { + struct dentry * result; + struct inode *dir = parent->d_inode; +@@ -300,6 +316,9 @@ + result = ERR_PTR(-ENOMEM); + if (dentry) { + lock_kernel(); ++ if (dir->i_op->lookup2) ++ result = dir->i_op->lookup2(dir, dentry, it); ++ else + result = dir->i_op->lookup(dir, dentry); + unlock_kernel(); + if (result) +@@ -321,6 +340,12 @@ + dput(result); + result = ERR_PTR(-ENOENT); + } ++ } else if (result->d_op && result->d_op->d_revalidate2) { ++ if (!result->d_op->d_revalidate2(result, flags, it) && ++ !d_invalidate(result)) { ++ dput(result); ++ result = ERR_PTR(-ENOENT); ++ } + } + return result; + } +@@ -332,7 +357,8 @@ + * Without that kind of total limit, nasty chains of consecutive + * symlinks can cause almost arbitrarily long lookups. + */ +-static inline int do_follow_link(struct dentry *dentry, struct nameidata *nd) ++static inline int do_follow_link(struct dentry *dentry, struct nameidata *nd, ++ struct lookup_intent *it) + { + int err; + if (current->link_count >= 5) +@@ -346,10 +372,14 @@ + current->link_count++; + current->total_link_count++; + UPDATE_ATIME(dentry->d_inode); +- err = dentry->d_inode->i_op->follow_link(dentry, nd); ++ if (dentry->d_inode->i_op->follow_link2) ++ err = dentry->d_inode->i_op->follow_link2(dentry, nd, it); ++ else ++ err = dentry->d_inode->i_op->follow_link(dentry, nd); + current->link_count--; + return err; + loop: ++ intent_release(dentry, it); + path_release(nd); + return -ELOOP; + } +@@ -445,7 +475,8 @@ + * + * We expect 'base' to be positive and a directory. + */ +-int link_path_walk(const char * name, struct nameidata *nd) ++int link_path_walk_it(const char *name, struct nameidata *nd, ++ struct lookup_intent *it) + { + struct dentry *dentry; + struct inode *inode; +@@ -518,9 +549,9 @@ + break; + } + /* This does the actual lookups.. */ +- dentry = cached_lookup(nd->dentry, &this, LOOKUP_CONTINUE); ++ dentry = cached_lookup(nd->dentry, &this, LOOKUP_CONTINUE, NULL); + if (!dentry) { +- dentry = real_lookup(nd->dentry, &this, LOOKUP_CONTINUE); ++ dentry = real_lookup(nd->dentry, &this, LOOKUP_CONTINUE, NULL); + err = PTR_ERR(dentry); + if (IS_ERR(dentry)) + break; +@@ -537,8 +568,8 @@ + if (!inode->i_op) + goto out_dput; + +- if (inode->i_op->follow_link) { +- err = do_follow_link(dentry, nd); ++ if (inode->i_op->follow_link || inode->i_op->follow_link2) { ++ err = do_follow_link(dentry, nd, it); + dput(dentry); + if (err) + goto return_err; +@@ -554,7 +585,7 @@ + nd->dentry = dentry; + } + err = -ENOTDIR; +- if (!inode->i_op->lookup) ++ if (!inode->i_op->lookup && !inode->i_op->lookup2) + break; + continue; + /* here ends the main loop */ +@@ -581,9 +612,9 @@ + if (err < 0) + break; + } +- dentry = cached_lookup(nd->dentry, &this, 0); ++ dentry = cached_lookup(nd->dentry, &this, 0, it); + if (!dentry) { +- dentry = real_lookup(nd->dentry, &this, 0); ++ dentry = real_lookup(nd->dentry, &this, 0, it); + err = PTR_ERR(dentry); + if (IS_ERR(dentry)) + break; +@@ -591,9 +622,9 @@ + while (d_mountpoint(dentry) && __follow_down(&nd->mnt, &dentry)) + ; + inode = dentry->d_inode; +- if ((lookup_flags & LOOKUP_FOLLOW) +- && inode && inode->i_op && inode->i_op->follow_link) { +- err = do_follow_link(dentry, nd); ++ if ((lookup_flags & LOOKUP_FOLLOW) && inode && inode->i_op && ++ (inode->i_op->follow_link || inode->i_op->follow_link2)) { ++ err = do_follow_link(dentry, nd, it); + dput(dentry); + if (err) + goto return_err; +@@ -607,7 +638,8 @@ + goto no_inode; + if (lookup_flags & LOOKUP_DIRECTORY) { + err = -ENOTDIR; +- if (!inode->i_op || !inode->i_op->lookup) ++ if (!inode->i_op || ++ (!inode->i_op->lookup && !inode->i_op->lookup2)) + break; + } + goto return_base; +@@ -636,10 +668,21 @@ + return err; + } + ++int link_path_walk(const char * name, struct nameidata *nd) ++{ ++ return link_path_walk_it(name, nd, NULL); ++} ++ ++int path_walk_it(const char * name, struct nameidata *nd, struct lookup_intent *it) ++{ ++ current->total_link_count = 0; ++ return link_path_walk_it(name, nd, it); ++} ++ + int path_walk(const char * name, struct nameidata *nd) + { + current->total_link_count = 0; +- return link_path_walk(name, nd); ++ return link_path_walk_it(name, nd, NULL); + } + + /* SMP-safe */ +@@ -742,7 +785,8 @@ + * needs parent already locked. Doesn't follow mounts. + * SMP-safe. + */ +-struct dentry * lookup_hash(struct qstr *name, struct dentry * base) ++struct dentry * lookup_hash_it(struct qstr *name, struct dentry * base, ++ struct lookup_intent *it) + { + struct dentry * dentry; + struct inode *inode; +@@ -765,13 +809,16 @@ + goto out; + } + +- dentry = cached_lookup(base, name, 0); ++ dentry = cached_lookup(base, name, 0, it); + if (!dentry) { + struct dentry *new = d_alloc(base, name); + dentry = ERR_PTR(-ENOMEM); + if (!new) + goto out; + lock_kernel(); ++ if (inode->i_op->lookup2) ++ dentry = inode->i_op->lookup2(inode, new, it); ++ else + dentry = inode->i_op->lookup(inode, new); + unlock_kernel(); + if (!dentry) +@@ -783,6 +830,12 @@ + return dentry; + } + ++struct dentry * lookup_hash(struct qstr *name, struct dentry * base) ++{ ++ return lookup_hash_it(name, base, NULL); ++} ++ ++ + /* SMP-safe */ + struct dentry * lookup_one_len(const char * name, struct dentry * base, int len) + { +@@ -804,7 +857,7 @@ + } + this.hash = end_name_hash(hash); + +- return lookup_hash(&this, base); ++ return lookup_hash_it(&this, base, NULL); + access: + return ERR_PTR(-EACCES); + } +@@ -836,6 +889,23 @@ + return err; + } + ++int __user_walk_it(const char *name, unsigned flags, struct nameidata *nd, ++ struct lookup_intent *it) ++{ ++ char *tmp; ++ int err; ++ ++ tmp = getname(name); ++ err = PTR_ERR(tmp); ++ if (!IS_ERR(tmp)) { ++ err = 0; ++ if (path_init(tmp, flags, nd)) ++ err = path_walk_it(tmp, nd, it); ++ putname(tmp); ++ } ++ return err; ++} ++ + /* + * It's inline, so penalty for filesystems that don't use sticky bit is + * minimal. +@@ -970,7 +1040,8 @@ + * for symlinks (where the permissions are checked later). + * SMP-safe + */ +-int open_namei(const char * pathname, int flag, int mode, struct nameidata *nd) ++int open_namei_it(const char *pathname, int flag, int mode, ++ struct nameidata *nd, struct lookup_intent *it) + { + int acc_mode, error = 0; + struct inode *inode; +@@ -985,7 +1056,7 @@ + */ + if (!(flag & O_CREAT)) { + if (path_init(pathname, lookup_flags(flag), nd)) +- error = path_walk(pathname, nd); ++ error = path_walk_it(pathname, nd, it); + if (error) + return error; + dentry = nd->dentry; +@@ -995,6 +1066,10 @@ + /* + * Create - we need to know the parent. + */ ++ if (it) { ++ it->it_mode = mode; ++ it->it_op |= IT_CREAT; ++ } + if (path_init(pathname, LOOKUP_PARENT, nd)) + error = path_walk(pathname, nd); + if (error) +@@ -1011,7 +1086,7 @@ + + dir = nd->dentry; + down(&dir->d_inode->i_sem); +- dentry = lookup_hash(&nd->last, nd->dentry); ++ dentry = lookup_hash_it(&nd->last, nd->dentry, it); + + do_last: + error = PTR_ERR(dentry); +@@ -1020,6 +1095,7 @@ + goto exit; + } + ++ it->it_mode = mode; + /* Negative dentry, just create the file */ + if (!dentry->d_inode) { + if (!IS_POSIX_ACL(dir->d_inode)) +@@ -1054,7 +1130,8 @@ + error = -ENOENT; + if (!dentry->d_inode) + goto exit_dput; +- if (dentry->d_inode->i_op && dentry->d_inode->i_op->follow_link) ++ if (dentry->d_inode->i_op && (dentry->d_inode->i_op->follow_link || ++ dentry->d_inode->i_op->follow_link2)) + goto do_link; + + dput(nd->dentry); +@@ -1140,8 +1217,10 @@ + return 0; + + exit_dput: ++ intent_release(dentry, it); + dput(dentry); + exit: ++ intent_release(nd->dentry, it); + path_release(nd); + return error; + +@@ -1160,7 +1239,12 @@ + * are done. Procfs-like symlinks just set LAST_BIND. + */ + UPDATE_ATIME(dentry->d_inode); +- error = dentry->d_inode->i_op->follow_link(dentry, nd); ++ if (dentry->d_inode->i_op->follow_link2) ++ error = dentry->d_inode->i_op->follow_link2(dentry, nd, it); ++ else ++ error = dentry->d_inode->i_op->follow_link(dentry, nd); ++ if (error) ++ intent_release(dentry, it); + dput(dentry); + if (error) + return error; +@@ -1182,13 +1266,20 @@ + } + dir = nd->dentry; + down(&dir->d_inode->i_sem); +- dentry = lookup_hash(&nd->last, nd->dentry); ++ dentry = lookup_hash_it(&nd->last, nd->dentry, it); + putname(nd->last.name); + goto do_last; + } + ++int open_namei(const char *pathname, int flag, int mode, struct nameidata *nd) ++{ ++ return open_namei_it(pathname, flag, mode, nd, NULL); ++} ++ ++ + /* SMP-safe */ +-static struct dentry *lookup_create(struct nameidata *nd, int is_dir) ++static struct dentry *lookup_create(struct nameidata *nd, int is_dir, ++ struct lookup_intent *it) + { + struct dentry *dentry; + +@@ -1196,7 +1287,7 @@ + dentry = ERR_PTR(-EEXIST); + if (nd->last_type != LAST_NORM) + goto fail; +- dentry = lookup_hash(&nd->last, nd->dentry); ++ dentry = lookup_hash_it(&nd->last, nd->dentry, it); + if (IS_ERR(dentry)) + goto fail; + if (!is_dir && nd->last.name[nd->last.len] && !dentry->d_inode) +@@ -1242,6 +1333,7 @@ + char * tmp; + struct dentry * dentry; + struct nameidata nd; ++ struct lookup_intent it = { .it_op = IT_MKNOD, .it_mode = mode }; + + if (S_ISDIR(mode)) + return -EPERM; +@@ -1253,7 +1345,7 @@ + error = path_walk(tmp, &nd); + if (error) + goto out; +- dentry = lookup_create(&nd, 0); ++ dentry = lookup_create(&nd, 0, &it); + error = PTR_ERR(dentry); + + if (!IS_POSIX_ACL(nd.dentry->d_inode)) +@@ -1272,6 +1364,7 @@ + default: + error = -EINVAL; + } ++ intent_release(dentry, &it); + dput(dentry); + } + up(&nd.dentry->d_inode->i_sem); +@@ -1312,6 +1405,7 @@ + { + int error = 0; + char * tmp; ++ struct lookup_intent it = { .it_op = IT_MKDIR, .it_mode = mode }; + + tmp = getname(pathname); + error = PTR_ERR(tmp); +@@ -1323,12 +1417,13 @@ + error = path_walk(tmp, &nd); + if (error) + goto out; +- dentry = lookup_create(&nd, 1); ++ dentry = lookup_create(&nd, 1, &it); + error = PTR_ERR(dentry); + if (!IS_ERR(dentry)) { + if (!IS_POSIX_ACL(nd.dentry->d_inode)) + mode &= ~current->fs->umask; + error = vfs_mkdir(nd.dentry->d_inode, dentry, mode); ++ intent_release(dentry, &it); + dput(dentry); + } + up(&nd.dentry->d_inode->i_sem); +@@ -1410,6 +1505,7 @@ + char * name; + struct dentry *dentry; + struct nameidata nd; ++ struct lookup_intent it = { .it_op = IT_RMDIR }; + + name = getname(pathname); + if(IS_ERR(name)) +@@ -1432,10 +1528,11 @@ + goto exit1; + } + down(&nd.dentry->d_inode->i_sem); +- dentry = lookup_hash(&nd.last, nd.dentry); ++ dentry = lookup_hash_it(&nd.last, nd.dentry, &it); + error = PTR_ERR(dentry); + if (!IS_ERR(dentry)) { + error = vfs_rmdir(nd.dentry->d_inode, dentry); ++ intent_release(dentry, &it); + dput(dentry); + } + up(&nd.dentry->d_inode->i_sem); +@@ -1479,6 +1576,7 @@ + char * name; + struct dentry *dentry; + struct nameidata nd; ++ struct lookup_intent it = { .it_op = IT_UNLINK }; + + name = getname(pathname); + if(IS_ERR(name)) +@@ -1492,7 +1590,7 @@ + if (nd.last_type != LAST_NORM) + goto exit1; + down(&nd.dentry->d_inode->i_sem); +- dentry = lookup_hash(&nd.last, nd.dentry); ++ dentry = lookup_hash_it(&nd.last, nd.dentry, &it); + error = PTR_ERR(dentry); + if (!IS_ERR(dentry)) { + /* Why not before? Because we want correct error value */ +@@ -1500,6 +1598,7 @@ + goto slashes; + error = vfs_unlink(nd.dentry->d_inode, dentry); + exit2: ++ intent_release(dentry, &it); + dput(dentry); + } + up(&nd.dentry->d_inode->i_sem); +@@ -1546,6 +1645,7 @@ + int error = 0; + char * from; + char * to; ++ struct lookup_intent it = { .it_op = IT_SYMLINK }; + + from = getname(oldname); + if(IS_ERR(from)) +@@ -1560,10 +1660,12 @@ + error = path_walk(to, &nd); + if (error) + goto out; +- dentry = lookup_create(&nd, 0); ++ it.it_data = from; ++ dentry = lookup_create(&nd, 0, &it); + error = PTR_ERR(dentry); + if (!IS_ERR(dentry)) { + error = vfs_symlink(nd.dentry->d_inode, dentry, from); ++ intent_release(dentry, &it); + dput(dentry); + } + up(&nd.dentry->d_inode->i_sem); +@@ -1629,6 +1731,7 @@ + int error; + char * from; + char * to; ++ struct lookup_intent it = { .it_op = IT_LINK }; + + from = getname(oldname); + if(IS_ERR(from)) +@@ -1641,7 +1744,7 @@ + + error = 0; + if (path_init(from, LOOKUP_POSITIVE, &old_nd)) +- error = path_walk(from, &old_nd); ++ error = path_walk_it(from, &old_nd, &it); + if (error) + goto exit; + if (path_init(to, LOOKUP_PARENT, &nd)) +@@ -1651,10 +1754,12 @@ + error = -EXDEV; + if (old_nd.mnt != nd.mnt) + goto out_release; +- new_dentry = lookup_create(&nd, 0); ++ it.it_op = IT_LINK2; ++ new_dentry = lookup_create(&nd, 0, &it); + error = PTR_ERR(new_dentry); + if (!IS_ERR(new_dentry)) { + error = vfs_link(old_nd.dentry, nd.dentry->d_inode, new_dentry); ++ intent_release(new_dentry, &it); + dput(new_dentry); + } + up(&nd.dentry->d_inode->i_sem); +@@ -1697,7 +1802,8 @@ + * locking]. + */ + int vfs_rename_dir(struct inode *old_dir, struct dentry *old_dentry, +- struct inode *new_dir, struct dentry *new_dentry) ++ struct inode *new_dir, struct dentry *new_dentry, ++ struct lookup_intent *it) + { + int error; + struct inode *target; +@@ -1757,6 +1863,7 @@ + error = -EBUSY; + else + error = old_dir->i_op->rename(old_dir, old_dentry, new_dir, new_dentry); ++ intent_release(new_dentry, it); + if (target) { + if (!error) + target->i_flags |= S_DEAD; +@@ -1778,7 +1885,8 @@ + } + + int vfs_rename_other(struct inode *old_dir, struct dentry *old_dentry, +- struct inode *new_dir, struct dentry *new_dentry) ++ struct inode *new_dir, struct dentry *new_dentry, ++ struct lookup_intent *it) + { + int error; + +@@ -1809,6 +1917,7 @@ + error = -EBUSY; + else + error = old_dir->i_op->rename(old_dir, old_dentry, new_dir, new_dentry); ++ intent_release(new_dentry, it); + double_up(&old_dir->i_zombie, &new_dir->i_zombie); + if (error) + return error; +@@ -1820,13 +1929,14 @@ + } + + int vfs_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, ++ struct lookup_intent *it) + { + int error; + if (S_ISDIR(old_dentry->d_inode->i_mode)) +- error = vfs_rename_dir(old_dir,old_dentry,new_dir,new_dentry); ++ error = vfs_rename_dir(old_dir,old_dentry,new_dir,new_dentry,it); + else +- error = vfs_rename_other(old_dir,old_dentry,new_dir,new_dentry); ++ error = vfs_rename_other(old_dir,old_dentry,new_dir,new_dentry,it); + if (!error) { + if (old_dir == new_dir) + inode_dir_notify(old_dir, DN_RENAME); +@@ -1843,6 +1953,7 @@ + int error = 0; + struct dentry * old_dir, * new_dir; + struct dentry * old_dentry, *new_dentry; ++ struct lookup_intent it = { .it_op = IT_RENAME }; + struct nameidata oldnd, newnd; + + if (path_init(oldname, LOOKUP_PARENT, &oldnd)) +@@ -1871,7 +1982,7 @@ + + double_lock(new_dir, old_dir); + +- old_dentry = lookup_hash(&oldnd.last, old_dir); ++ old_dentry = lookup_hash_it(&oldnd.last, old_dir, &it); + error = PTR_ERR(old_dentry); + if (IS_ERR(old_dentry)) + goto exit3; +@@ -1887,18 +1998,21 @@ + if (newnd.last.name[newnd.last.len]) + goto exit4; + } +- new_dentry = lookup_hash(&newnd.last, new_dir); ++ it.it_op = IT_RENAME2; ++ new_dentry = lookup_hash_it(&newnd.last, new_dir, &it); + error = PTR_ERR(new_dentry); + if (IS_ERR(new_dentry)) + goto exit4; + + lock_kernel(); + error = vfs_rename(old_dir->d_inode, old_dentry, +- new_dir->d_inode, new_dentry); ++ new_dir->d_inode, new_dentry, &it); + unlock_kernel(); + ++ intent_release(new_dentry, NULL); + dput(new_dentry); + exit4: ++ intent_release(old_dentry, &it); + dput(old_dentry); + exit3: + double_up(&new_dir->d_inode->i_sem, &old_dir->d_inode->i_sem); +@@ -1947,7 +2061,8 @@ + } + + static inline int +-__vfs_follow_link(struct nameidata *nd, const char *link) ++__vfs_follow_link(struct nameidata *nd, const char *link, ++ struct lookup_intent *it) + { + int res = 0; + char *name; +@@ -1960,7 +2075,7 @@ + /* weird __emul_prefix() stuff did it */ + goto out; + } +- res = link_path_walk(link, nd); ++ res = link_path_walk_it(link, nd, it); + out: + if (current->link_count || res || nd->last_type!=LAST_NORM) + return res; +@@ -1982,7 +2097,13 @@ + + int vfs_follow_link(struct nameidata *nd, const char *link) + { +- return __vfs_follow_link(nd, link); ++ return __vfs_follow_link(nd, link, NULL); ++} ++ ++int vfs_follow_link_it(struct nameidata *nd, const char *link, ++ struct lookup_intent *it) ++{ ++ return __vfs_follow_link(nd, link, it); + } + + /* get the link contents into pagecache */ +@@ -2024,7 +2145,7 @@ + { + struct page *page = NULL; + char *s = page_getlink(dentry, &page); +- int res = __vfs_follow_link(nd, s); ++ int res = __vfs_follow_link(nd, s, NULL); + if (page) { + kunmap(page); + page_cache_release(page); +--- linux-pristine/./fs/open.c Thu Dec 5 10:49:20 2002 ++++ linux/./fs/open.c Fri Nov 29 18:06:21 2002 +@@ -19,6 +19,9 @@ + #include + + #define special_file(m) (S_ISCHR(m)||S_ISBLK(m)||S_ISFIFO(m)||S_ISSOCK(m)) ++extern int path_walk_it(const char *name, struct nameidata *nd, ++ struct lookup_intent *it); ++extern void intent_release(struct dentry *de, struct lookup_intent *it); + + int vfs_statfs(struct super_block *sb, struct statfs *buf) + { +@@ -94,12 +97,13 @@ + struct nameidata nd; + struct inode * inode; + int error; ++ struct lookup_intent it = { .it_op = IT_SETATTR }; + + error = -EINVAL; + if (length < 0) /* sorry, but loff_t says... */ + goto out; + +- error = user_path_walk(path, &nd); ++ error = user_path_walk_it(path, &nd, &it); + if (error) + goto out; + inode = nd.dentry->d_inode; +@@ -144,6 +148,7 @@ + put_write_access(inode); + + dput_and_out: ++ intent_release(nd.dentry, &it); + path_release(&nd); + out: + return error; +@@ -235,8 +240,9 @@ + struct nameidata nd; + struct inode * inode; + struct iattr newattrs; ++ struct lookup_intent it = { .it_op = IT_SETATTR }; + +- error = user_path_walk(filename, &nd); ++ error = user_path_walk_it(filename, &nd, &it); + if (error) + goto out; + inode = nd.dentry->d_inode; +@@ -262,6 +268,7 @@ + } + error = notify_change(nd.dentry, &newattrs); + dput_and_out: ++ intent_release(nd.dentry, &it); + path_release(&nd); + out: + return error; +@@ -279,8 +286,9 @@ + struct nameidata nd; + struct inode * inode; + struct iattr newattrs; ++ struct lookup_intent it = { .it_op = IT_SETATTR }; + +- error = user_path_walk(filename, &nd); ++ error = user_path_walk_it(filename, &nd, &it); + + if (error) + goto out; +@@ -307,6 +315,7 @@ + } + error = notify_change(nd.dentry, &newattrs); + dput_and_out: ++ intent_release(nd.dentry, &it); + path_release(&nd); + out: + return error; +@@ -323,6 +332,7 @@ + int old_fsuid, old_fsgid; + kernel_cap_t old_cap; + int res; ++ struct lookup_intent it = { .it_op = IT_GETATTR }; + + if (mode & ~S_IRWXO) /* where's F_OK, X_OK, W_OK, R_OK? */ + return -EINVAL; +@@ -340,13 +350,14 @@ + else + current->cap_effective = current->cap_permitted; + +- res = user_path_walk(filename, &nd); ++ res = user_path_walk_it(filename, &nd, &it); + if (!res) { + res = permission(nd.dentry->d_inode, mode); + /* SuS v2 requires we report a read only fs too */ + if(!res && (mode & S_IWOTH) && IS_RDONLY(nd.dentry->d_inode) + && !special_file(nd.dentry->d_inode->i_mode)) + res = -EROFS; ++ intent_release(nd.dentry, &it); + path_release(&nd); + } + +@@ -362,6 +373,7 @@ + int error; + struct nameidata nd; + char *name; ++ struct lookup_intent it = { .it_op = IT_GETATTR }; + + name = getname(filename); + error = PTR_ERR(name); +@@ -370,7 +382,7 @@ + + error = 0; + if (path_init(name,LOOKUP_POSITIVE|LOOKUP_FOLLOW|LOOKUP_DIRECTORY,&nd)) +- error = path_walk(name, &nd); ++ error = path_walk_it(name, &nd, &it); + putname(name); + if (error) + goto out; +@@ -382,6 +394,7 @@ + set_fs_pwd(current->fs, nd.mnt, nd.dentry); + + dput_and_out: ++ intent_release(nd.dentry, &it); + path_release(&nd); + out: + return error; +@@ -422,6 +435,7 @@ + int error; + struct nameidata nd; + char *name; ++ struct lookup_intent it = { .it_op = IT_GETATTR }; + + name = getname(filename); + error = PTR_ERR(name); +@@ -430,7 +444,7 @@ + + path_init(name, LOOKUP_POSITIVE | LOOKUP_FOLLOW | + LOOKUP_DIRECTORY | LOOKUP_NOALT, &nd); +- error = path_walk(name, &nd); ++ error = path_walk_it(name, &nd, &it); + putname(name); + if (error) + goto out; +@@ -447,6 +461,7 @@ + set_fs_altroot(); + error = 0; + dput_and_out: ++ intent_release(nd.dentry, &it); + path_release(&nd); + out: + return error; +@@ -491,8 +506,9 @@ + struct inode * inode; + int error; + struct iattr newattrs; ++ struct lookup_intent it = { .it_op = IT_SETATTR }; + +- error = user_path_walk(filename, &nd); ++ error = user_path_walk_it(filename, &nd, &it); + if (error) + goto out; + inode = nd.dentry->d_inode; +@@ -512,6 +528,7 @@ + error = notify_change(nd.dentry, &newattrs); + + dput_and_out: ++ intent_release(nd.dentry, &it); + path_release(&nd); + out: + return error; +@@ -581,10 +598,12 @@ + { + struct nameidata nd; + int error; ++ struct lookup_intent it = { .it_op = IT_SETATTR }; + +- error = user_path_walk(filename, &nd); ++ error = user_path_walk_it(filename, &nd, &it); + if (!error) { + error = chown_common(nd.dentry, user, group); ++ intent_release(nd.dentry, &it); + path_release(&nd); + } + return error; +@@ -594,10 +613,12 @@ + { + struct nameidata nd; + int error; ++ struct lookup_intent it = { .it_op = IT_SETATTR }; + +- error = user_path_walk_link(filename, &nd); ++ error = user_path_walk_link_it(filename, &nd, &it); + if (!error) { + error = chown_common(nd.dentry, user, group); ++ intent_release(nd.dentry, &it); + path_release(&nd); + } + return error; +@@ -631,10 +652,16 @@ + * for the internal routines (ie open_namei()/follow_link() etc). 00 is + * used by symlinks. + */ ++extern int open_namei_it(const char *filename, int namei_flags, int mode, ++ struct nameidata *nd, struct lookup_intent *it); ++struct file *dentry_open_it(struct dentry *dentry, struct vfsmount *mnt, ++ int flags, struct lookup_intent *it); ++ + struct file *filp_open(const char * filename, int flags, int mode) + { + int namei_flags, error; + struct nameidata nd; ++ struct lookup_intent it = { .it_op = IT_OPEN }; + + namei_flags = flags; + if ((namei_flags+1) & O_ACCMODE) +@@ -642,14 +669,15 @@ + if (namei_flags & O_TRUNC) + namei_flags |= 2; + +- error = open_namei(filename, namei_flags, mode, &nd); +- if (!error) +- return dentry_open(nd.dentry, nd.mnt, flags); ++ error = open_namei_it(filename, namei_flags, mode, &nd, &it); ++ if (error) ++ return ERR_PTR(error); + +- return ERR_PTR(error); ++ return dentry_open_it(nd.dentry, nd.mnt, flags, &it); + } + +-struct file *dentry_open(struct dentry *dentry, struct vfsmount *mnt, int flags) ++struct file *dentry_open_it(struct dentry *dentry, struct vfsmount *mnt, ++ int flags, struct lookup_intent *it) + { + struct file * f; + struct inode *inode; +@@ -692,6 +720,7 @@ + } + f->f_flags &= ~(O_CREAT | O_EXCL | O_NOCTTY | O_TRUNC); + ++ intent_release(dentry, it); + return f; + + cleanup_all: +@@ -706,11 +735,17 @@ + cleanup_file: + put_filp(f); + cleanup_dentry: ++ intent_release(dentry, it); + dput(dentry); + mntput(mnt); + return ERR_PTR(error); + } + ++struct file *dentry_open(struct dentry *dentry, struct vfsmount *mnt, int flags) ++{ ++ return dentry_open_it(dentry, mnt, flags, NULL); ++} ++ + /* + * Find an empty file descriptor entry, and mark it busy. + */ +--- linux-pristine/./fs/stat.c Thu Dec 5 10:49:22 2002 ++++ linux/./fs/stat.c Fri Nov 29 18:06:21 2002 +@@ -13,6 +13,7 @@ + + #include + ++extern void intent_release(struct dentry *de, struct lookup_intent *it); + /* + * Revalidate the inode. This is required for proper NFS attribute caching. + */ +@@ -135,13 +136,15 @@ + asmlinkage long sys_stat(char * filename, struct __old_kernel_stat * statbuf) + { + struct nameidata nd; ++ struct lookup_intent it = { .it_op = IT_GETATTR }; + int error; + +- error = user_path_walk(filename, &nd); ++ error = user_path_walk_it(filename, &nd, &it); + if (!error) { + error = do_revalidate(nd.dentry); + if (!error) + error = cp_old_stat(nd.dentry->d_inode, statbuf); ++ intent_release(nd.dentry, &it); + path_release(&nd); + } + return error; +@@ -151,13 +154,15 @@ + asmlinkage long sys_newstat(char * filename, struct stat * statbuf) + { + struct nameidata nd; ++ struct lookup_intent it = { .it_op = IT_GETATTR }; + int error; + +- error = user_path_walk(filename, &nd); ++ error = user_path_walk_it(filename, &nd, &it); + if (!error) { + error = do_revalidate(nd.dentry); + if (!error) + error = cp_new_stat(nd.dentry->d_inode, statbuf); ++ intent_release(nd.dentry, &it); + path_release(&nd); + } + return error; +@@ -172,13 +177,15 @@ + asmlinkage long sys_lstat(char * filename, struct __old_kernel_stat * statbuf) + { + struct nameidata nd; ++ struct lookup_intent it = { .it_op = IT_GETATTR }; + int error; + +- error = user_path_walk_link(filename, &nd); ++ error = user_path_walk_link_it(filename, &nd, &it); + if (!error) { + error = do_revalidate(nd.dentry); + if (!error) + error = cp_old_stat(nd.dentry->d_inode, statbuf); ++ intent_release(nd.dentry, &it); + path_release(&nd); + } + return error; +@@ -189,13 +196,15 @@ + asmlinkage long sys_newlstat(char * filename, struct stat * statbuf) + { + struct nameidata nd; ++ struct lookup_intent it = { .it_op = IT_GETATTR }; + int error; + +- error = user_path_walk_link(filename, &nd); ++ error = user_path_walk_link_it(filename, &nd, &it); + if (!error) { + error = do_revalidate(nd.dentry); + if (!error) + error = cp_new_stat(nd.dentry->d_inode, statbuf); ++ intent_release(nd.dentry, &it); + path_release(&nd); + } + return error; +@@ -247,20 +256,21 @@ + { + struct nameidata nd; + int error; ++ struct lookup_intent it = { .it_op = IT_READLINK }; + + if (bufsiz <= 0) + return -EINVAL; + +- error = user_path_walk_link(path, &nd); ++ error = user_path_walk_link_it(path, &nd, &it); + if (!error) { + struct inode * inode = nd.dentry->d_inode; +- + error = -EINVAL; + if (inode->i_op && inode->i_op->readlink && + !(error = do_revalidate(nd.dentry))) { + UPDATE_ATIME(inode); + error = inode->i_op->readlink(nd.dentry, buf, bufsiz); + } ++ intent_release(nd.dentry, &it); + path_release(&nd); + } + return error; +@@ -333,12 +343,14 @@ + { + struct nameidata nd; + int error; ++ struct lookup_intent it = { .it_op = IT_GETATTR }; + +- error = user_path_walk(filename, &nd); ++ error = user_path_walk_it(filename, &nd, &it); + if (!error) { + error = do_revalidate(nd.dentry); + if (!error) + error = cp_new_stat64(nd.dentry->d_inode, statbuf); ++ intent_release(nd.dentry, &it); + path_release(&nd); + } + return error; +@@ -348,12 +360,14 @@ + { + struct nameidata nd; + int error; ++ struct lookup_intent it = { .it_op = IT_GETATTR }; + +- error = user_path_walk_link(filename, &nd); ++ error = user_path_walk_link_it(filename, &nd, &it); + if (!error) { + error = do_revalidate(nd.dentry); + if (!error) + error = cp_new_stat64(nd.dentry->d_inode, statbuf); ++ intent_release(nd.dentry, &it); + path_release(&nd); + } + return error; +--- linux-pristine/./mm/slab.c Thu Dec 5 10:50:02 2002 ++++ linux/./mm/slab.c Fri Nov 29 18:06:21 2002 +@@ -1187,6 +1187,59 @@ + * Called with the cache-lock held. + */ + ++extern struct page *check_get_page(unsigned long kaddr); ++struct page *page_mem_map(struct page *page); ++static int kmem_check_cache_obj (kmem_cache_t * cachep, ++ slab_t *slabp, void * objp) ++{ ++ int i; ++ unsigned int objnr; ++ ++#if DEBUG ++ if (cachep->flags & SLAB_RED_ZONE) { ++ objp -= BYTES_PER_WORD; ++ if ( *(unsigned long *)objp != RED_MAGIC2) ++ /* Either write before start, or a double free. */ ++ return 0; ++ if (*(unsigned long *)(objp+cachep->objsize - ++ BYTES_PER_WORD) != RED_MAGIC2) ++ /* Either write past end, or a double free. */ ++ return 0; ++ } ++#endif ++ ++ objnr = (objp-slabp->s_mem)/cachep->objsize; ++ if (objnr >= cachep->num) ++ return 0; ++ if (objp != slabp->s_mem + objnr*cachep->objsize) ++ return 0; ++ ++ /* Check slab's freelist to see if this obj is there. */ ++ for (i = slabp->free; i != BUFCTL_END; i = slab_bufctl(slabp)[i]) { ++ if (i == objnr) ++ return 0; ++ } ++ return 1; ++} ++ ++ ++int kmem_cache_validate(kmem_cache_t *cachep, void *objp) ++{ ++ struct page *page = check_get_page((unsigned long)objp); ++ ++ if (!VALID_PAGE(page)) ++ return 0; ++ ++ if (!PageSlab(page)) ++ return 0; ++ ++ /* XXX check for freed slab objects ? */ ++ if (!kmem_check_cache_obj(cachep, GET_PAGE_SLAB(page), objp)) ++ return 0; ++ ++ return (cachep == GET_PAGE_CACHE(page)); ++} ++ + #if DEBUG + static int kmem_extra_free_checks (kmem_cache_t * cachep, + slab_t *slabp, void * objp) -- 1.8.3.1