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Commit fde6699c authored by Dave Kleikamp's avatar Dave Kleikamp
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Merge kleikamp.austin.ibm.com:/home/shaggy/bk/jfs-2.5 

into kleikamp.austin.ibm.com:/home/shaggy/bk/resize-2.5
parents 30c4273f 1c706086
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Showing with 266 additions and 360 deletions
fs/jfs/file.c
View file @ fde6699c
......@@ -38,9 +38,7 @@ int jfs_fsync(struct file *file, struct dentry *dentry, int datasync)
if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
return rc;
IWRITE_LOCK(inode);
rc |= jfs_commit_inode(inode, 1);
IWRITE_UNLOCK(inode);
return rc ? -EIO : 0;
}
......@@ -64,10 +62,19 @@ void jfs_truncate_nolock(struct inode *ip, loff_t length)
do {
tid = txBegin(ip->i_sb, 0);
/*
* The commit_sem cannot be taken before txBegin.
* txBegin may block and there is a chance the inode
* could be marked dirty and need to be committed
* before txBegin unblocks
*/
down(&JFS_IP(ip)->commit_sem);
newsize = xtTruncate(tid, ip, length,
COMMIT_TRUNCATE | COMMIT_PWMAP);
if (newsize < 0) {
txEnd(tid);
up(&JFS_IP(ip)->commit_sem);
break;
}
......@@ -76,6 +83,7 @@ void jfs_truncate_nolock(struct inode *ip, loff_t length)
txCommit(tid, 1, &ip, 0);
txEnd(tid);
up(&JFS_IP(ip)->commit_sem);
} while (newsize > length); /* Truncate isn't always atomic */
}
......
fs/jfs/inode.c
View file @ fde6699c
......@@ -107,8 +107,10 @@ int jfs_commit_inode(struct inode *inode, int wait)
}
tid = txBegin(inode->i_sb, COMMIT_INODE);
down(&JFS_IP(inode)->commit_sem);
rc = txCommit(tid, 1, &inode, wait ? COMMIT_SYNC : 0);
txEnd(tid);
up(&JFS_IP(inode)->commit_sem);
return -rc;
}
......@@ -123,25 +125,19 @@ void jfs_write_inode(struct inode *inode, int wait)
!test_cflag(COMMIT_Dirty, inode))
return;
IWRITE_LOCK(inode);
if (jfs_commit_inode(inode, wait)) {
jERROR(1, ("jfs_write_inode: jfs_commit_inode failed!\n"));
}
IWRITE_UNLOCK(inode);
}
void jfs_delete_inode(struct inode *inode)
{
jFYI(1, ("In jfs_delete_inode, inode = 0x%p\n", inode));
IWRITE_LOCK(inode);
if (test_cflag(COMMIT_Freewmap, inode))
freeZeroLink(inode);
diFree(inode);
IWRITE_UNLOCK(inode);
clear_inode(inode);
}
......@@ -203,8 +199,7 @@ static int jfs_get_block(struct inode *ip, sector_t lblock,
if ((no_size_check ||
((lblock64 << ip->i_sb->s_blocksize_bits) < ip->i_size)) &&
(xtLookup
(ip, lblock64, 1, &xflag, &xaddr, &xlen, no_size_check)
(xtLookup(ip, lblock64, 1, &xflag, &xaddr, &xlen, no_size_check)
== 0) && xlen) {
if (xflag & XAD_NOTRECORDED) {
if (!create)
......@@ -241,8 +236,7 @@ static int jfs_get_block(struct inode *ip, sector_t lblock,
* Allocate a new block
*/
#ifdef _JFS_4K
if ((rc =
extHint(ip, lblock64 << ip->i_sb->s_blocksize_bits, &xad)))
if ((rc = extHint(ip, lblock64 << ip->i_sb->s_blocksize_bits, &xad)))
goto unlock;
rc = extAlloc(ip, 1, lblock64, &xad, FALSE);
if (rc)
......
fs/jfs/jfs_extent.c
View file @ fde6699c
......@@ -96,6 +96,9 @@ extAlloc(struct inode *ip, s64 xlen, s64 pno, xad_t * xp, boolean_t abnr)
/* This blocks if we are low on resources */
txBeginAnon(ip->i_sb);
/* Avoid race with jfs_commit_inode() */
down(&JFS_IP(ip)->commit_sem);
/* validate extent length */
if (xlen > MAXXLEN)
xlen = MAXXLEN;
......@@ -138,8 +141,8 @@ extAlloc(struct inode *ip, s64 xlen, s64 pno, xad_t * xp, boolean_t abnr)
* is smaller than the number of blocks per page.
*/
nxlen = xlen;
if ((rc =
extBalloc(ip, hint ? hint : INOHINT(ip), &nxlen, &nxaddr))) {
if ((rc = extBalloc(ip, hint ? hint : INOHINT(ip), &nxlen, &nxaddr))) {
up(&JFS_IP(ip)->commit_sem);
return (rc);
}
......@@ -160,6 +163,7 @@ extAlloc(struct inode *ip, s64 xlen, s64 pno, xad_t * xp, boolean_t abnr)
*/
if (rc) {
dbFree(ip, nxaddr, nxlen);
up(&JFS_IP(ip)->commit_sem);
return (rc);
}
......@@ -174,6 +178,7 @@ extAlloc(struct inode *ip, s64 xlen, s64 pno, xad_t * xp, boolean_t abnr)
mark_inode_dirty(ip);
up(&JFS_IP(ip)->commit_sem);
/*
* COMMIT_SyncList flags an anonymous tlock on page that is on
* sync list.
......@@ -217,6 +222,7 @@ int extRealloc(struct inode *ip, s64 nxlen, xad_t * xp, boolean_t abnr)
/* This blocks if we are low on resources */
txBeginAnon(ip->i_sb);
down(&JFS_IP(ip)->commit_sem);
/* validate extent length */
if (nxlen > MAXXLEN)
nxlen = MAXXLEN;
......@@ -235,7 +241,7 @@ int extRealloc(struct inode *ip, s64 nxlen, xad_t * xp, boolean_t abnr)
if ((xp->flag & XAD_NOTRECORDED) && !abnr) {
xp->flag = 0;
if ((rc = xtUpdate(0, ip, xp)))
return (rc);
goto exit;
}
/* try to allocated the request number of blocks for the
......@@ -247,7 +253,7 @@ int extRealloc(struct inode *ip, s64 nxlen, xad_t * xp, boolean_t abnr)
* space as to satisfy the extend page.
*/
if ((rc = extBrealloc(ip, xaddr, xlen, &nxlen, &nxaddr)))
return (rc);
goto exit;
delta = nxlen - xlen;
......@@ -284,7 +290,7 @@ int extRealloc(struct inode *ip, s64 nxlen, xad_t * xp, boolean_t abnr)
/* extend the extent */
if ((rc = xtExtend(0, ip, xoff + xlen, (int) nextend, 0))) {
dbFree(ip, xaddr + xlen, delta);
return (rc);
goto exit;
}
} else {
/*
......@@ -294,7 +300,7 @@ int extRealloc(struct inode *ip, s64 nxlen, xad_t * xp, boolean_t abnr)
*/
if ((rc = xtTailgate(0, ip, xoff, (int) ntail, nxaddr, 0))) {
dbFree(ip, nxaddr, nxlen);
return (rc);
goto exit;
}
}
......@@ -325,8 +331,9 @@ int extRealloc(struct inode *ip, s64 nxlen, xad_t * xp, boolean_t abnr)
xp->flag = xflag;
mark_inode_dirty(ip);
return (0);
exit:
up(&JFS_IP(ip)->commit_sem);
return (rc);
}
......@@ -423,19 +430,13 @@ int extRecord(struct inode *ip, xad_t * xp)
txBeginAnon(ip->i_sb);
/* update the extent */
if ((rc = xtUpdate(0, ip, xp)))
return (rc);
#ifdef _STILL_TO_PORT
/* no longer abnr */
cp->cm_abnr = FALSE;
down(&JFS_IP(ip)->commit_sem);
/* mark the cbuf as modified */
cp->cm_modified = TRUE;
#endif /* _STILL_TO_PORT */
/* update the extent */
rc = xtUpdate(0, ip, xp);
return (0);
up(&JFS_IP(ip)->commit_sem);
return (rc);
}
......
fs/jfs/jfs_incore.h
View file @ fde6699c
......@@ -19,6 +19,7 @@
#ifndef _H_JFS_INCORE
#define _H_JFS_INCORE
#include <linux/rwsem.h>
#include <linux/slab.h>
#include <asm/bitops.h>
#include "jfs_types.h"
......@@ -30,14 +31,6 @@
*/
#define JFS_SUPER_MAGIC 0x3153464a /* "JFS1" */
/*
* Due to header ordering problems this can't be in jfs_lock.h
*/
typedef struct jfs_rwlock {
struct rw_semaphore rw_sem;
atomic_t in_use; /* for hacked implementation of trylock */
} jfs_rwlock_t;
/*
* JFS-private inode information
*/
......@@ -62,7 +55,19 @@ struct jfs_inode_info {
lid_t atltail; /* anonymous tlock list tail */
struct list_head anon_inode_list; /* inodes having anonymous txns */
struct list_head mp_list; /* metapages in inode's address space */
jfs_rwlock_t rdwrlock; /* read/write lock */
/*
* rdwrlock serializes xtree between reads & writes and synchronizes
* changes to special inodes. It's use would be redundant on
* directories since the i_sem taken in the VFS is sufficient.
*/
struct rw_semaphore rdwrlock;
/*
* commit_sem serializes transaction processing on an inode.
* It must be taken after beginning a transaction (txBegin), since
* dirty inodes may be committed while a new transaction on the
* inode is blocked in txBegin or TxBeginAnon
*/
struct semaphore commit_sem;
lid_t xtlid; /* lid of xtree lock on directory */
union {
struct {
......@@ -87,6 +92,12 @@ struct jfs_inode_info {
#define i_dtroot u.dir._dtroot
#define i_inline u.link._inline
#define IREAD_LOCK(ip) down_read(&JFS_IP(ip)->rdwrlock)
#define IREAD_UNLOCK(ip) up_read(&JFS_IP(ip)->rdwrlock)
#define IWRITE_LOCK(ip) down_write(&JFS_IP(ip)->rdwrlock)
#define IWRITE_UNLOCK(ip) up_write(&JFS_IP(ip)->rdwrlock)
/*
* cflag
*/
......
fs/jfs/jfs_inode.c
View file @ fde6699c
......@@ -91,40 +91,3 @@ struct inode *ialloc(struct inode *parent, umode_t mode)
return inode;
}
/*
* NAME: iwritelocklist()
*
* FUNCTION: Lock multiple inodes in sorted order to avoid deadlock
*
*/
void iwritelocklist(int n, ...)
{
va_list ilist;
struct inode *sort[4];
struct inode *ip;
int k, m;
va_start(ilist, n);
for (k = 0; k < n; k++)
sort[k] = va_arg(ilist, struct inode *);
va_end(ilist);
/* Bubble sort in descending order */
do {
m = 0;
for (k = 0; k < n; k++)
if ((k + 1) < n
&& sort[k + 1]->i_ino > sort[k]->i_ino) {
ip = sort[k];
sort[k] = sort[k + 1];
sort[k + 1] = ip;
m++;
}
} while (m);
/* Lock them */
for (k = 0; k < n; k++) {
IWRITE_LOCK(sort[k]);
}
}
fs/jfs/jfs_lock.h
View file @ fde6699c
......@@ -24,63 +24,7 @@
/*
* jfs_lock.h
*
* JFS lock definition for globally referenced locks
*/
/* readers/writer lock: thread-thread */
/*
* RW semaphores do not currently have a trylock function. Since the
* implementation varies by platform, I have implemented a platform-independent
* wrapper around the rw_semaphore routines. If this turns out to be the best
* way of avoiding our locking problems, I will push to get a trylock
* implemented in the kernel, but I'd rather find a way to avoid having to
* use it.
*/
#define RDWRLOCK_T jfs_rwlock_t
static inline void RDWRLOCK_INIT(jfs_rwlock_t * Lock)
{
init_rwsem(&Lock->rw_sem);
atomic_set(&Lock->in_use, 0);
}
static inline void READ_LOCK(jfs_rwlock_t * Lock)
{
atomic_inc(&Lock->in_use);
down_read(&Lock->rw_sem);
}
static inline void READ_UNLOCK(jfs_rwlock_t * Lock)
{
up_read(&Lock->rw_sem);
atomic_dec(&Lock->in_use);
}
static inline void WRITE_LOCK(jfs_rwlock_t * Lock)
{
atomic_inc(&Lock->in_use);
down_write(&Lock->rw_sem);
}
static inline int WRITE_TRYLOCK(jfs_rwlock_t * Lock)
{
if (atomic_read(&Lock->in_use))
return 0;
WRITE_LOCK(Lock);
return 1;
}
static inline void WRITE_UNLOCK(jfs_rwlock_t * Lock)
{
up_write(&Lock->rw_sem);
atomic_dec(&Lock->in_use);
}
#define IREAD_LOCK(ip) READ_LOCK(&JFS_IP(ip)->rdwrlock)
#define IREAD_UNLOCK(ip) READ_UNLOCK(&JFS_IP(ip)->rdwrlock)
#define IWRITE_LOCK(ip) WRITE_LOCK(&JFS_IP(ip)->rdwrlock)
#define IWRITE_TRYLOCK(ip) WRITE_TRYLOCK(&JFS_IP(ip)->rdwrlock)
#define IWRITE_UNLOCK(ip) WRITE_UNLOCK(&JFS_IP(ip)->rdwrlock)
#define IWRITE_LOCK_LIST iwritelocklist
extern void iwritelocklist(int, ...);
/*
* Conditional sleep where condition is protected by spinlock
......
fs/jfs/jfs_logmgr.c
View file @ fde6699c
......@@ -1524,8 +1524,6 @@ static int lmLogShutdown(log_t * log)
*
* RETURN: 0 - success
* errors returned by vms_iowait().
*
* serialization: IWRITE_LOCK(log inode) held on entry/exit
*/
static int lmLogFileSystem(log_t * log, char *uuid, int activate)
{
......
fs/jfs/jfs_metapage.c
View file @ fde6699c
......@@ -20,6 +20,7 @@
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/buffer_head.h>
#include <linux/mempool.h>
#include "jfs_incore.h"
#include "jfs_filsys.h"
#include "jfs_metapage.h"
......@@ -27,11 +28,6 @@
#include "jfs_debug.h"
extern struct task_struct *jfsCommitTask;
static unsigned int metapages = 1024; /* ??? Need a better number */
static unsigned int free_metapages;
static metapage_t *metapage_buf;
static unsigned long meta_order;
static metapage_t *meta_free_list = NULL;
static spinlock_t meta_lock = SPIN_LOCK_UNLOCKED;
static wait_queue_head_t meta_wait;
......@@ -93,12 +89,51 @@ static inline void lock_metapage(struct metapage *mp)
__lock_metapage(mp);
}
int __init metapage_init(void)
#define METAPOOL_MIN_PAGES 32
static kmem_cache_t *metapage_cache;
static mempool_t *metapage_mempool;
static void init_once(void *foo, kmem_cache_t *cachep, unsigned long flags)
{
int i;
metapage_t *last = NULL;
metapage_t *mp;
metapage_t *mp = (metapage_t *)foo;
if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
SLAB_CTOR_CONSTRUCTOR) {
mp->lid = 0;
mp->lsn = 0;
mp->flag = 0;
mp->data = NULL;
mp->clsn = 0;
mp->log = NULL;
set_bit(META_free, &mp->flag);
init_waitqueue_head(&mp->wait);
}
}
static inline metapage_t *alloc_metapage(int no_wait)
{
return mempool_alloc(metapage_mempool, no_wait ? GFP_ATOMIC : GFP_NOFS);
}
static inline void free_metapage(metapage_t *mp)
{
mp->flag = 0;
set_bit(META_free, &mp->flag);
mempool_free(mp, metapage_mempool);
}
static void *mp_mempool_alloc(int gfp_mask, void *pool_data)
{
return kmem_cache_alloc(metapage_cache, gfp_mask);
}
static void mp_mempool_free(void *element, void *pool_data)
{
return kmem_cache_free(metapage_cache, element);
}
int __init metapage_init(void)
{
/*
* Initialize wait queue
*/
......@@ -107,30 +142,18 @@ int __init metapage_init(void)
/*
* Allocate the metapage structures
*/
for (meta_order = 0;
((PAGE_SIZE << meta_order) / sizeof(metapage_t)) < metapages;
meta_order++);
metapages = (PAGE_SIZE << meta_order) / sizeof(metapage_t);
jFYI(1, ("metapage_init: metapage size = %Zd, metapages = %d\n",
sizeof(metapage_t), metapages));
metapage_cache = kmem_cache_create("jfs_mp", sizeof(metapage_t), 0, 0,
init_once, NULL);
if (metapage_cache == NULL)
return -ENOMEM;
metapage_buf =
(metapage_t *) __get_free_pages(GFP_KERNEL, meta_order);
assert(metapage_buf);
memset(metapage_buf, 0, PAGE_SIZE << meta_order);
metapage_mempool = mempool_create(METAPOOL_MIN_PAGES, mp_mempool_alloc,
mp_mempool_free, NULL);
mp = metapage_buf;
for (i = 0; i < metapages; i++, mp++) {
mp->flag = 0;
set_bit(META_free, &mp->flag);
init_waitqueue_head(&mp->wait);
mp->hash_next = last;
last = mp;
if (metapage_mempool == NULL) {
kmem_cache_destroy(metapage_cache);
return -ENOMEM;
}
meta_free_list = last;
free_metapages = metapages;
/*
* Now the hash list
*/
......@@ -147,64 +170,8 @@ int __init metapage_init(void)
void metapage_exit(void)
{
free_pages((unsigned long) metapage_buf, meta_order);
free_pages((unsigned long) hash_table, hash_order);
metapage_buf = 0; /* This is a signal to the jfsIOwait thread */
}
/*
* Get metapage structure from freelist
*
* Caller holds meta_lock
*/
static metapage_t *alloc_metapage(int *dropped_lock)
{
metapage_t *new;
*dropped_lock = FALSE;
/*
* Reserve two metapages for the lazy commit thread. Otherwise
* we may deadlock with holders of metapages waiting for tlocks
* that lazy thread should be freeing.
*/
if ((free_metapages < 3) && (current != jfsCommitTask)) {
INCREMENT(mpStat.allocwait);
*dropped_lock = TRUE;
__SLEEP_COND(meta_wait, (free_metapages > 2),
spin_lock(&meta_lock), spin_unlock(&meta_lock));
}
assert(meta_free_list);
new = meta_free_list;
meta_free_list = new->hash_next;
free_metapages--;
return new;
}
/*
* Put metapage on freelist (holding meta_lock)
*/
static inline void __free_metapage(metapage_t * mp)
{
mp->flag = 0;
set_bit(META_free, &mp->flag);
mp->hash_next = meta_free_list;
meta_free_list = mp;
free_metapages++;
wake_up(&meta_wait);
}
/*
* Put metapage on freelist (not holding meta_lock)
*/
static inline void free_metapage(metapage_t * mp)
{
spin_lock(&meta_lock);
__free_metapage(mp);
spin_unlock(&meta_lock);
mempool_destroy(metapage_mempool);
kmem_cache_destroy(metapage_cache);
}
/*
......@@ -307,7 +274,6 @@ metapage_t *__get_metapage(struct inode *inode,
unsigned long lblock, unsigned int size,
int absolute, unsigned long new)
{
int dropped_lock;
metapage_t **hash_ptr;
int l2BlocksPerPage;
int l2bsize;
......@@ -353,17 +319,43 @@ metapage_t *__get_metapage(struct inode *inode,
jERROR(1, ("MetaData crosses page boundary!!\n"));
return NULL;
}
/*
* Locks held on aggregate inode pages are usually
* not held long, and they are taken in critical code
* paths (committing dirty inodes, txCommit thread)
*
* Attempt to get metapage without blocking, tapping into
* reserves if necessary.
*/
mp = NULL;
if (JFS_IP(inode)->fileset == AGGREGATE_I) {
mp = mempool_alloc(metapage_mempool, GFP_ATOMIC);
if (!mp) {
/*
* mempool is supposed to protect us from
* failing here. We will try a blocking
* call, but a deadlock is possible here
*/
printk(KERN_WARNING
"__get_metapage: atomic call to mempool_alloc failed.\n");
printk(KERN_WARNING
"Will attempt blocking call\n");
}
}
if (!mp) {
metapage_t *mp2;
mp = alloc_metapage(&dropped_lock);
if (dropped_lock) {
/* alloc_metapage blocked, we need to search the hash
* again. (The goto is ugly, maybe we'll clean this
* up in the future.)
spin_unlock(&meta_lock);
mp = mempool_alloc(metapage_mempool, GFP_NOFS);
spin_lock(&meta_lock);
/* we dropped the meta_lock, we need to search the
* hash again.
*/
metapage_t *mp2;
mp2 = search_hash(hash_ptr, mapping, lblock);
if (mp2) {
__free_metapage(mp);
free_metapage(mp);
mp = mp2;
goto page_found;
}
......@@ -416,7 +408,7 @@ metapage_t *__get_metapage(struct inode *inode,
remove_from_hash(mp, hash_ptr);
if (!absolute)
list_del(&mp->inode_list);
__free_metapage(mp);
free_metapage(mp);
spin_unlock(&meta_lock);
return NULL;
}
......@@ -631,12 +623,10 @@ int jfs_mpstat_read(char *buffer, char **start, off_t offset, int length,
len += sprintf(buffer,
"JFS Metapage statistics\n"
"=======================\n"
"metapages in use = %d\n"
"page allocations = %d\n"
"page frees = %d\n"
"lock waits = %d\n"
"allocation waits = %d\n",
metapages - free_metapages,
mpStat.pagealloc,
mpStat.pagefree,
mpStat.lockwait,
......
fs/jfs/jfs_txnmgr.c
View file @ fde6699c
......@@ -2898,6 +2898,8 @@ int jfs_sync(void)
{
struct inode *ip;
struct jfs_inode_info *jfs_ip;
int rc;
tid_t tid;
lock_kernel();
......@@ -2927,17 +2929,19 @@ int jfs_sync(void)
ip = &jfs_ip->vfs_inode;
/*
* We must release the TXN_LOCK since our
* IWRITE_TRYLOCK implementation may still block
* down_trylock returns 0 on success. This is
* inconsistent with spin_trylock.
*/
TXN_UNLOCK();
if (IWRITE_TRYLOCK(ip)) {
if (! down_trylock(&jfs_ip->commit_sem)) {
/*
* inode will be removed from anonymous list
* when it is committed
*/
jfs_commit_inode(ip, 0);
IWRITE_UNLOCK(ip);
TXN_UNLOCK();
tid = txBegin(ip->i_sb, COMMIT_INODE);
rc = txCommit(tid, 1, &ip, 0);
txEnd(tid);
up(&jfs_ip->commit_sem);
/*
* Just to be safe. I don't know how
* long we can run without blocking
......@@ -2945,17 +2949,11 @@ int jfs_sync(void)
cond_resched();
TXN_LOCK();
} else {
/* We can't get the write lock. It may
/* We can't get the commit semaphore. It may
* be held by a thread waiting for tlock's
* so let's not block here. Save it to
* put back on the anon_list.
*/
/*
* We released TXN_LOCK, let's make sure
* this inode is still there
*/
TXN_LOCK();
if (TxAnchor.anon_list.next !=
&jfs_ip->anon_inode_list)
continue;
......
fs/jfs/namei.c
View file @ fde6699c
......@@ -69,8 +69,6 @@ int jfs_create(struct inode *dip, struct dentry *dentry, int mode)
jFYI(1, ("jfs_create: dip:0x%p name:%s\n", dip, dentry->d_name.name));
IWRITE_LOCK(dip);
/*
* search parent directory for entry/freespace
* (dtSearch() returns parent directory page pinned)
......@@ -91,12 +89,12 @@ int jfs_create(struct inode *dip, struct dentry *dentry, int mode)
tid = txBegin(dip->i_sb, 0);
down(&JFS_IP(dip)->commit_sem);
down(&JFS_IP(ip)->commit_sem);
if ((rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE))) {
jERROR(1, ("jfs_create: dtSearch returned %d\n", rc));
ip->i_nlink = 0;
iput(ip);
txEnd(tid);
goto out2;
goto out3;
}
tblk = tid_to_tblock(tid);
......@@ -118,16 +116,11 @@ int jfs_create(struct inode *dip, struct dentry *dentry, int mode)
ino = ip->i_ino;
if ((rc = dtInsert(tid, dip, &dname, &ino, &btstack))) {
jERROR(1, ("jfs_create: dtInsert returned %d\n", rc));
/* discard new inode */
ip->i_nlink = 0;
iput(ip);
if (rc == EIO)
txAbort(tid, 1); /* Marks Filesystem dirty */
else
txAbort(tid, 0); /* Filesystem full */
txEnd(tid);
goto out2;
goto out3;
}
ip->i_op = &jfs_file_inode_operations;
......@@ -143,14 +136,21 @@ int jfs_create(struct inode *dip, struct dentry *dentry, int mode)
mark_inode_dirty(dip);
rc = txCommit(tid, 2, &iplist[0], 0);
out3:
txEnd(tid);
up(&JFS_IP(dip)->commit_sem);
up(&JFS_IP(ip)->commit_sem);
if (rc) {
ip->i_nlink = 0;
iput(ip);
}
out2:
free_UCSname(&dname);
out1:
IWRITE_UNLOCK(dip);
jFYI(1, ("jfs_create: rc:%d\n", -rc));
return -rc;
}
......@@ -184,8 +184,6 @@ int jfs_mkdir(struct inode *dip, struct dentry *dentry, int mode)
jFYI(1, ("jfs_mkdir: dip:0x%p name:%s\n", dip, dentry->d_name.name));
IWRITE_LOCK(dip);
/* link count overflow on parent directory ? */
if (dip->i_nlink == JFS_LINK_MAX) {
rc = EMLINK;
......@@ -212,12 +210,12 @@ int jfs_mkdir(struct inode *dip, struct dentry *dentry, int mode)
tid = txBegin(dip->i_sb, 0);
down(&JFS_IP(dip)->commit_sem);
down(&JFS_IP(ip)->commit_sem);
if ((rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE))) {
jERROR(1, ("jfs_mkdir: dtSearch returned %d\n", rc));
ip->i_nlink = 0;
iput(ip);
txEnd(tid);
goto out2;
goto out3;
}
tblk = tid_to_tblock(tid);
......@@ -239,16 +237,12 @@ int jfs_mkdir(struct inode *dip, struct dentry *dentry, int mode)
ino = ip->i_ino;
if ((rc = dtInsert(tid, dip, &dname, &ino, &btstack))) {
jERROR(1, ("jfs_mkdir: dtInsert returned %d\n", rc));
/* discard new directory inode */
ip->i_nlink = 0;
iput(ip);
if (rc == EIO)
txAbort(tid, 1); /* Marks Filesystem dirty */
else
txAbort(tid, 0); /* Filesystem full */
txEnd(tid);
goto out2;
goto out3;
}
ip->i_nlink = 2; /* for '.' */
......@@ -267,15 +261,21 @@ int jfs_mkdir(struct inode *dip, struct dentry *dentry, int mode)
mark_inode_dirty(dip);
rc = txCommit(tid, 2, &iplist[0], 0);
out3:
txEnd(tid);
up(&JFS_IP(dip)->commit_sem);
up(&JFS_IP(ip)->commit_sem);
if (rc) {
ip->i_nlink = 0;
iput(ip);
}
out2:
free_UCSname(&dname);
out1:
IWRITE_UNLOCK(dip);
jFYI(1, ("jfs_mkdir: rc:%d\n", -rc));
return -rc;
}
......@@ -311,24 +311,21 @@ int jfs_rmdir(struct inode *dip, struct dentry *dentry)
jFYI(1, ("jfs_rmdir: dip:0x%p name:%s\n", dip, dentry->d_name.name));
IWRITE_LOCK_LIST(2, dip, ip);
/* directory must be empty to be removed */
if (!dtEmpty(ip)) {
IWRITE_UNLOCK(ip);
IWRITE_UNLOCK(dip);
rc = ENOTEMPTY;
goto out;
}
if ((rc = get_UCSname(&dname, dentry, JFS_SBI(dip->i_sb)->nls_tab))) {
IWRITE_UNLOCK(ip);
IWRITE_UNLOCK(dip);
goto out;
}
tid = txBegin(dip->i_sb, 0);
down(&JFS_IP(dip)->commit_sem);
down(&JFS_IP(ip)->commit_sem);
iplist[0] = dip;
iplist[1] = ip;
......@@ -345,9 +342,8 @@ int jfs_rmdir(struct inode *dip, struct dentry *dentry)
if (rc == EIO)
txAbort(tid, 1);
txEnd(tid);
IWRITE_UNLOCK(ip);
IWRITE_UNLOCK(dip);
up(&JFS_IP(dip)->commit_sem);
up(&JFS_IP(ip)->commit_sem);
goto out2;
}
......@@ -384,7 +380,8 @@ int jfs_rmdir(struct inode *dip, struct dentry *dentry)
txEnd(tid);
IWRITE_UNLOCK(ip);
up(&JFS_IP(dip)->commit_sem);
up(&JFS_IP(ip)->commit_sem);
/*
* Truncating the directory index table is not guaranteed. It
......@@ -397,8 +394,6 @@ int jfs_rmdir(struct inode *dip, struct dentry *dentry)
clear_cflag(COMMIT_Stale, dip);
}
IWRITE_UNLOCK(dip);
out2:
free_UCSname(&dname);
......@@ -444,10 +439,13 @@ int jfs_unlink(struct inode *dip, struct dentry *dentry)
if ((rc = get_UCSname(&dname, dentry, JFS_SBI(dip->i_sb)->nls_tab)))
goto out;
IWRITE_LOCK_LIST(2, ip, dip);
IWRITE_LOCK(ip);
tid = txBegin(dip->i_sb, 0);
down(&JFS_IP(dip)->commit_sem);
down(&JFS_IP(ip)->commit_sem);
iplist[0] = dip;
iplist[1] = ip;
......@@ -460,8 +458,9 @@ int jfs_unlink(struct inode *dip, struct dentry *dentry)
if (rc == EIO)
txAbort(tid, 1); /* Marks FS Dirty */
txEnd(tid);
up(&JFS_IP(dip)->commit_sem);
up(&JFS_IP(ip)->commit_sem);
IWRITE_UNLOCK(ip);
IWRITE_UNLOCK(dip);
goto out1;
}
......@@ -483,8 +482,9 @@ int jfs_unlink(struct inode *dip, struct dentry *dentry)
if ((new_size = commitZeroLink(tid, ip)) < 0) {
txAbort(tid, 1); /* Marks FS Dirty */
txEnd(tid);
up(&JFS_IP(dip)->commit_sem);
up(&JFS_IP(ip)->commit_sem);
IWRITE_UNLOCK(ip);
IWRITE_UNLOCK(dip);
rc = -new_size; /* We return -rc */
goto out1;
}
......@@ -511,8 +511,13 @@ int jfs_unlink(struct inode *dip, struct dentry *dentry)
txEnd(tid);
up(&JFS_IP(dip)->commit_sem);
up(&JFS_IP(ip)->commit_sem);
while (new_size && (rc == 0)) {
tid = txBegin(dip->i_sb, 0);
down(&JFS_IP(ip)->commit_sem);
new_size = xtTruncate_pmap(tid, ip, new_size);
if (new_size < 0) {
txAbort(tid, 1); /* Marks FS Dirty */
......@@ -520,6 +525,7 @@ int jfs_unlink(struct inode *dip, struct dentry *dentry)
} else
rc = txCommit(tid, 2, &iplist[0], COMMIT_SYNC);
txEnd(tid);
up(&JFS_IP(ip)->commit_sem);
}
if (ip->i_nlink == 0)
......@@ -539,8 +545,6 @@ int jfs_unlink(struct inode *dip, struct dentry *dentry)
clear_cflag(COMMIT_Stale, dip);
}
IWRITE_UNLOCK(dip);
out1:
free_UCSname(&dname);
out:
......@@ -764,10 +768,11 @@ int jfs_link(struct dentry *old_dentry,
("jfs_link: %s %s\n", old_dentry->d_name.name,
dentry->d_name.name));
IWRITE_LOCK_LIST(2, dir, ip);
tid = txBegin(ip->i_sb, 0);
down(&JFS_IP(dir)->commit_sem);
down(&JFS_IP(ip)->commit_sem);
if (ip->i_nlink == JFS_LINK_MAX) {
rc = EMLINK;
goto out;
......@@ -801,11 +806,11 @@ int jfs_link(struct dentry *old_dentry,
rc = txCommit(tid, 2, &iplist[0], 0);
out:
IWRITE_UNLOCK(dir);
IWRITE_UNLOCK(ip);
txEnd(tid);
up(&JFS_IP(dir)->commit_sem);
up(&JFS_IP(ip)->commit_sem);
jFYI(1, ("jfs_link: rc:%d\n", rc));
return -rc;
}
......@@ -849,12 +854,8 @@ int jfs_symlink(struct inode *dip, struct dentry *dentry, const char *name)
jFYI(1, ("jfs_symlink: dip:0x%p name:%s\n", dip, name));
IWRITE_LOCK(dip);
ssize = strlen(name) + 1;
tid = txBegin(dip->i_sb, 0);
/*
* search parent directory for entry/freespace
* (dtSearch() returns parent directory page pinned)
......@@ -863,23 +864,24 @@ int jfs_symlink(struct inode *dip, struct dentry *dentry, const char *name)
if ((rc = get_UCSname(&dname, dentry, JFS_SBI(dip->i_sb)->nls_tab)))
goto out1;
if ((rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE)))
goto out2;
/*
* allocate on-disk/in-memory inode for symbolic link:
* (iAlloc() returns new, locked inode)
*/
ip = ialloc(dip, S_IFLNK | 0777);
if (ip == NULL) {
BT_PUTSEARCH(&btstack);
rc = ENOSPC;
goto out2;
}
tid = txBegin(dip->i_sb, 0);
down(&JFS_IP(dip)->commit_sem);
down(&JFS_IP(ip)->commit_sem);
if ((rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE)))
goto out3;
tblk = tid_to_tblock(tid);
tblk->xflag |= COMMIT_CREATE;
tblk->ip = ip;
......@@ -895,9 +897,7 @@ int jfs_symlink(struct inode *dip, struct dentry *dentry, const char *name)
if ((rc = dtInsert(tid, dip, &dname, &ino, &btstack))) {
jERROR(1, ("jfs_symlink: dtInsert returned %d\n", rc));
/* discard ne inode */
ip->i_nlink = 0;
iput(ip);
goto out2;
goto out3;
}
......@@ -955,10 +955,8 @@ int jfs_symlink(struct inode *dip, struct dentry *dentry, const char *name)
if (mp == NULL) {
dtDelete(tid, dip, &dname, &ino,
JFS_REMOVE);
ip->i_nlink = 0;
iput(ip);
rc = EIO;
goto out2;
goto out3;
}
memcpy(mp->data, name, copy_size);
flush_metapage(mp);
......@@ -977,10 +975,8 @@ int jfs_symlink(struct inode *dip, struct dentry *dentry, const char *name)
ip->i_blocks = LBLK2PBLK(sb, xlen);
} else {
dtDelete(tid, dip, &dname, &ino, JFS_REMOVE);
ip->i_nlink = 0;
iput(ip);
rc = ENOSPC;
goto out2;
goto out3;
}
}
......@@ -1008,14 +1004,19 @@ int jfs_symlink(struct inode *dip, struct dentry *dentry, const char *name)
} else
rc = txCommit(tid, 1, &iplist[0], 0);
out2:
out3:
txEnd(tid);
up(&JFS_IP(dip)->commit_sem);
up(&JFS_IP(ip)->commit_sem);
if (rc) {
ip->i_nlink = 0;
iput(ip);
}
out2:
free_UCSname(&dname);
out1:
IWRITE_UNLOCK(dip);
txEnd(tid);
out1:
jFYI(1, ("jfs_symlink: rc:%d\n", -rc));
return -rc;
}
......@@ -1054,19 +1055,6 @@ int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
old_ip = old_dentry->d_inode;
new_ip = new_dentry->d_inode;
if (old_dir == new_dir) {
if (new_ip)
IWRITE_LOCK_LIST(3, old_dir, old_ip, new_ip);
else
IWRITE_LOCK_LIST(2, old_dir, old_ip);
} else {
if (new_ip)
IWRITE_LOCK_LIST(4, old_dir, new_dir, old_ip,
new_ip);
else
IWRITE_LOCK_LIST(3, old_dir, new_dir, old_ip);
}
if ((rc = get_UCSname(&old_dname, old_dentry,
JFS_SBI(old_dir->i_sb)->nls_tab)))
goto out1;
......@@ -1112,14 +1100,21 @@ int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
rc = EMLINK;
goto out3;
}
}
} else if (new_ip)
IWRITE_LOCK(new_ip);
/*
* The real work starts here
*/
tid = txBegin(new_dir->i_sb, 0);
down(&JFS_IP(new_dir)->commit_sem);
down(&JFS_IP(old_ip)->commit_sem);
if (old_dir != new_dir)
down(&JFS_IP(old_dir)->commit_sem);
if (new_ip) {
down(&JFS_IP(new_ip)->commit_sem);
/*
* Change existing directory entry to new inode number
*/
......@@ -1247,14 +1242,24 @@ int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
/*
* Don't unlock new_ip if COMMIT_HOLDLOCK is set
*/
if (new_ip && test_cflag(COMMIT_Holdlock, new_ip))
if (new_ip && test_cflag(COMMIT_Holdlock, new_ip)) {
up(&JFS_IP(new_ip)->commit_sem);
new_ip = 0;
}
out4:
txEnd(tid);
up(&JFS_IP(new_dir)->commit_sem);
up(&JFS_IP(old_ip)->commit_sem);
if (old_dir != new_dir)
up(&JFS_IP(old_dir)->commit_sem);
if (new_ip)
up(&JFS_IP(new_ip)->commit_sem);
while (new_size && (rc == 0)) {
tid = txBegin(new_ip->i_sb, 0);
down(&JFS_IP(new_ip)->commit_sem);
new_size = xtTruncate_pmap(tid, new_ip, new_size);
if (new_size < 0) {
txAbort(tid, 1);
......@@ -1262,6 +1267,7 @@ int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
} else
rc = txCommit(tid, 1, &new_ip, COMMIT_SYNC);
txEnd(tid);
up(&JFS_IP(new_ip)->commit_sem);
}
if (new_ip && (new_ip->i_nlink == 0))
set_cflag(COMMIT_Nolink, new_ip);
......@@ -1270,12 +1276,8 @@ int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
out2:
free_UCSname(&old_dname);
out1:
IWRITE_UNLOCK(old_ip);
if (old_dir != new_dir)
IWRITE_UNLOCK(new_dir);
if (new_ip)
if (new_ip && !S_ISDIR(new_ip->i_mode))
IWRITE_UNLOCK(new_ip);
/*
* Truncating the directory index table is not guaranteed. It
* may need to be done iteratively
......@@ -1287,8 +1289,6 @@ int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
clear_cflag(COMMIT_Stale, old_dir);
}
IWRITE_UNLOCK(old_dir);
jFYI(1, ("jfs_rename: returning %d\n", rc));
return -rc;
}
......@@ -1315,8 +1315,6 @@ int jfs_mknod(struct inode *dir, struct dentry *dentry, int mode, int rdev)
if ((rc = get_UCSname(&dname, dentry, JFS_SBI(dir->i_sb)->nls_tab)))
goto out;
IWRITE_LOCK(dir);
ip = ialloc(dir, mode);
if (ip == NULL) {
rc = ENOSPC;
......@@ -1325,24 +1323,19 @@ int jfs_mknod(struct inode *dir, struct dentry *dentry, int mode, int rdev)
tid = txBegin(dir->i_sb, 0);
if ((rc = dtSearch(dir, &dname, &ino, &btstack, JFS_CREATE))) {
ip->i_nlink = 0;
iput(ip);
txEnd(tid);
goto out1;
}
down(&JFS_IP(dir)->commit_sem);
down(&JFS_IP(ip)->commit_sem);
if ((rc = dtSearch(dir, &dname, &ino, &btstack, JFS_CREATE)))
goto out3;
tblk = tid_to_tblock(tid);
tblk->xflag |= COMMIT_CREATE;
tblk->ip = ip;
ino = ip->i_ino;
if ((rc = dtInsert(tid, dir, &dname, &ino, &btstack))) {
ip->i_nlink = 0;
iput(ip);
txEnd(tid);
goto out1;
}
if ((rc = dtInsert(tid, dir, &dname, &ino, &btstack)))
goto out3;
init_special_inode(ip, ip->i_mode, rdev);
......@@ -1357,10 +1350,17 @@ int jfs_mknod(struct inode *dir, struct dentry *dentry, int mode, int rdev)
iplist[0] = dir;
iplist[1] = ip;
rc = txCommit(tid, 2, iplist, 0);
out3:
txEnd(tid);
up(&JFS_IP(ip)->commit_sem);
up(&JFS_IP(dir)->commit_sem);
if (rc) {
ip->i_nlink = 0;
iput(ip);
}
out1:
IWRITE_UNLOCK(dir);
free_UCSname(&dname);
out:
......@@ -1389,9 +1389,7 @@ static struct dentry *jfs_lookup(struct inode *dip, struct dentry *dentry)
if ((rc =
get_UCSname(&key, dentry, JFS_SBI(dip->i_sb)->nls_tab)))
return ERR_PTR(-rc);
IREAD_LOCK(dip);
rc = dtSearch(dip, &key, &inum, &btstack, JFS_LOOKUP);
IREAD_UNLOCK(dip);
free_UCSname(&key);
if (rc == ENOENT) {
d_add(dentry, NULL);
......
fs/jfs/super.c
View file @ fde6699c
......@@ -387,7 +387,8 @@ static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
SLAB_CTOR_CONSTRUCTOR) {
INIT_LIST_HEAD(&jfs_ip->anon_inode_list);
INIT_LIST_HEAD(&jfs_ip->mp_list);
RDWRLOCK_INIT(&jfs_ip->rdwrlock);
init_rwsem(&jfs_ip->rdwrlock);
init_MUTEX(&jfs_ip->commit_sem);
inode_init_once(&jfs_ip->vfs_inode);
}
}
......
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