10 files changed, 119 insertions, 142 deletions

diff --git a/fs/jfs/jfs_debug.c b/fs/jfs/jfs_debug.c
index bf6ab19b86ee..6a73de84bcef 100644
--- a/fs/jfs/jfs_debug.c
+++ b/fs/jfs/jfs_debug.c
@@ -21,6 +21,7 @@
 #include <linux/ctype.h>
 #include <linux/module.h>
 #include <linux/proc_fs.h>
+#include <linux/seq_file.h>
 #include <asm/uaccess.h>
 #include "jfs_incore.h"
 #include "jfs_filsys.h"
@@ -30,29 +31,19 @@
 
 static struct proc_dir_entry *base;
 #ifdef CONFIG_JFS_DEBUG
-static int loglevel_read(char *page, char **start, off_t off,
-                         int count, int *eof, void *data)
+static int jfs_loglevel_proc_show(struct seq_file *m, void *v)
 {
-        int len;
-
-        len = sprintf(page, "%d\n", jfsloglevel);
-
-        len -= off;
-        *start = page + off;
-
-        if (len > count)
-                len = count;
-        else
-                *eof = 1;
-
-        if (len < 0)
-                len = 0;
+        seq_printf(m, "%d\n", jfsloglevel);
+        return 0;
+}
 
-        return len;
+static int jfs_loglevel_proc_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, jfs_loglevel_proc_show, NULL);
 }
 
-static int loglevel_write(struct file *file, const char __user *buffer,
-                        unsigned long count, void *data)
+static ssize_t jfs_loglevel_proc_write(struct file *file,
+                const char __user *buffer, size_t count, loff_t *ppos)
 {
         char c;
 
@@ -65,22 +56,30 @@ static int loglevel_write(struct file *file, const char __user *buffer,
         jfsloglevel = c - '0';
         return count;
 }
+
+static const struct file_operations jfs_loglevel_proc_fops = {
+        .owner          = THIS_MODULE,
+        .open           = jfs_loglevel_proc_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+        .write          = jfs_loglevel_proc_write,
+};
 #endif
 
 static struct {
         const char      *name;
-        read_proc_t     *read_fn;
-        write_proc_t    *write_fn;
+        const struct file_operations *proc_fops;
 } Entries[] = {
 #ifdef CONFIG_JFS_STATISTICS
-        { "lmstats",    jfs_lmstats_read, },
-        { "txstats",    jfs_txstats_read, },
-        { "xtstat",     jfs_xtstat_read, },
-        { "mpstat",     jfs_mpstat_read, },
+        { "lmstats",    &jfs_lmstats_proc_fops, },
+        { "txstats",    &jfs_txstats_proc_fops, },
+        { "xtstat",     &jfs_xtstat_proc_fops, },
+        { "mpstat",     &jfs_mpstat_proc_fops, },
 #endif
 #ifdef CONFIG_JFS_DEBUG
-        { "TxAnchor",   jfs_txanchor_read, },
-        { "loglevel",   loglevel_read, loglevel_write }
+        { "TxAnchor",   &jfs_txanchor_proc_fops, },
+        { "loglevel",   &jfs_loglevel_proc_fops }
 #endif
 };
 #define NPROCENT        ARRAY_SIZE(Entries)
@@ -93,13 +92,8 @@ void jfs_proc_init(void)
                 return;
         base->owner = THIS_MODULE;
 
-        for (i = 0; i < NPROCENT; i++) {
-                struct proc_dir_entry *p;
-                if ((p = create_proc_entry(Entries[i].name, 0, base))) {
-                        p->read_proc = Entries[i].read_fn;
-                        p->write_proc = Entries[i].write_fn;
-                }
-        }
+        for (i = 0; i < NPROCENT; i++)
+                proc_create(Entries[i].name, 0, base, Entries[i].proc_fops);
 }
 
 void jfs_proc_clean(void)
diff --git a/fs/jfs/jfs_debug.h b/fs/jfs/jfs_debug.h
index 044c1e654cc0..eafd1300a00b 100644
--- a/fs/jfs/jfs_debug.h
+++ b/fs/jfs/jfs_debug.h
@@ -62,7 +62,7 @@ extern void jfs_proc_clean(void);
 
 extern int jfsloglevel;
 
-extern int jfs_txanchor_read(char *, char **, off_t, int, int *, void *);
+extern const struct file_operations jfs_txanchor_proc_fops;
 
 /* information message: e.g., configuration, major event */
 #define jfs_info(fmt, arg...) do {                      \
@@ -105,10 +105,10 @@ extern int jfs_txanchor_read(char *, char **, off_t, int, int *, void *);
  *      ----------
  */
 #ifdef  CONFIG_JFS_STATISTICS
-extern int jfs_lmstats_read(char *, char **, off_t, int, int *, void *);
-extern int jfs_txstats_read(char *, char **, off_t, int, int *, void *);
-extern int jfs_mpstat_read(char *, char **, off_t, int, int *, void *);
-extern int jfs_xtstat_read(char *, char **, off_t, int, int *, void *);
+extern const struct file_operations jfs_lmstats_proc_fops;
+extern const struct file_operations jfs_txstats_proc_fops;
+extern const struct file_operations jfs_mpstat_proc_fops;
+extern const struct file_operations jfs_xtstat_proc_fops;
 
 #define INCREMENT(x)            ((x)++)
 #define DECREMENT(x)            ((x)--)
diff --git a/fs/jfs/jfs_dtree.h b/fs/jfs/jfs_dtree.h
index cdac2d5bafeb..2545bb317235 100644
--- a/fs/jfs/jfs_dtree.h
+++ b/fs/jfs/jfs_dtree.h
@@ -243,9 +243,6 @@ typedef union {
 #define JFS_REMOVE 3
 #define JFS_RENAME 4
 
-#define DIRENTSIZ(namlen) \
-    ( (sizeof(struct dirent) - 2*(JFS_NAME_MAX+1) + 2*((namlen)+1) + 3) &~ 3 )
-
 /*
  * Maximum file offset for directories.
  */
diff --git a/fs/jfs/jfs_imap.c b/fs/jfs/jfs_imap.c
index 734ec916beaf..d6363d8309d0 100644
--- a/fs/jfs/jfs_imap.c
+++ b/fs/jfs/jfs_imap.c
@@ -1520,7 +1520,7 @@ int diAlloc(struct inode *pip, bool dir, struct inode *ip)
                                         jfs_error(ip->i_sb,
                                                   "diAlloc: can't find free bit "
                                                   "in wmap");
-                                        return EIO;
+                                        return -EIO;
                                 }
 
                                 /* determine the inode number within the
diff --git a/fs/jfs/jfs_logmgr.c b/fs/jfs/jfs_logmgr.c
index 325a9679b95a..cd2ec2988b59 100644
--- a/fs/jfs/jfs_logmgr.c
+++ b/fs/jfs/jfs_logmgr.c
@@ -69,6 +69,7 @@
 #include <linux/freezer.h>
 #include <linux/delay.h>
 #include <linux/mutex.h>
+#include <linux/seq_file.h>
 #include "jfs_incore.h"
 #include "jfs_filsys.h"
 #include "jfs_metapage.h"
@@ -2503,13 +2504,9 @@ exit:
 }
 
 #ifdef CONFIG_JFS_STATISTICS
-int jfs_lmstats_read(char *buffer, char **start, off_t offset, int length,
-                      int *eof, void *data)
+static int jfs_lmstats_proc_show(struct seq_file *m, void *v)
 {
-        int len = 0;
-        off_t begin;
-
-        len += sprintf(buffer,
+        seq_printf(m,
                        "JFS Logmgr stats\n"
                        "================\n"
                        "commits = %d\n"
@@ -2522,19 +2519,19 @@ int jfs_lmstats_read(char *buffer, char **start, off_t offset, int length,
                        lmStat.pagedone,
                        lmStat.full_page,
                        lmStat.partial_page);
+        return 0;
+}
 
-        begin = offset;
-        *start = buffer + begin;
-        len -= begin;
-
-        if (len > length)
-                len = length;
-        else
-                *eof = 1;
-
-        if (len < 0)
-                len = 0;
-
-        return len;
+static int jfs_lmstats_proc_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, jfs_lmstats_proc_show, NULL);
 }
+
+const struct file_operations jfs_lmstats_proc_fops = {
+        .owner          = THIS_MODULE,
+        .open           = jfs_lmstats_proc_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
 #endif /* CONFIG_JFS_STATISTICS */
diff --git a/fs/jfs/jfs_metapage.c b/fs/jfs/jfs_metapage.c
index d1e64f2f2fcd..854ff0ec574f 100644
--- a/fs/jfs/jfs_metapage.c
+++ b/fs/jfs/jfs_metapage.c
@@ -19,10 +19,12 @@
 
 #include <linux/fs.h>
 #include <linux/mm.h>
+#include <linux/module.h>
 #include <linux/bio.h>
 #include <linux/init.h>
 #include <linux/buffer_head.h>
 #include <linux/mempool.h>
+#include <linux/seq_file.h>
 #include "jfs_incore.h"
 #include "jfs_superblock.h"
 #include "jfs_filsys.h"
@@ -804,13 +806,9 @@ void __invalidate_metapages(struct inode *ip, s64 addr, int len)
 }
 
 #ifdef CONFIG_JFS_STATISTICS
-int jfs_mpstat_read(char *buffer, char **start, off_t offset, int length,
-                    int *eof, void *data)
+static int jfs_mpstat_proc_show(struct seq_file *m, void *v)
 {
-        int len = 0;
-        off_t begin;
-
-        len += sprintf(buffer,
+        seq_printf(m,
                        "JFS Metapage statistics\n"
                        "=======================\n"
                        "page allocations = %d\n"
@@ -819,19 +817,19 @@ int jfs_mpstat_read(char *buffer, char **start, off_t offset, int length,
                        mpStat.pagealloc,
                        mpStat.pagefree,
                        mpStat.lockwait);
+        return 0;
+}
 
-        begin = offset;
-        *start = buffer + begin;
-        len -= begin;
-
-        if (len > length)
-                len = length;
-        else
-                *eof = 1;
-
-        if (len < 0)
-                len = 0;
-
-        return len;
+static int jfs_mpstat_proc_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, jfs_mpstat_proc_show, NULL);
 }
+
+const struct file_operations jfs_mpstat_proc_fops = {
+        .owner          = THIS_MODULE,
+        .open           = jfs_mpstat_proc_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
 #endif
diff --git a/fs/jfs/jfs_txnmgr.c b/fs/jfs/jfs_txnmgr.c
index e7c60ae6b5b2..f26e4d03ada5 100644
--- a/fs/jfs/jfs_txnmgr.c
+++ b/fs/jfs/jfs_txnmgr.c
@@ -49,6 +49,7 @@
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/kthread.h>
+#include <linux/seq_file.h>
 #include "jfs_incore.h"
 #include "jfs_inode.h"
 #include "jfs_filsys.h"
@@ -3009,11 +3010,8 @@ int jfs_sync(void *arg)
 }
 
 #if defined(CONFIG_PROC_FS) && defined(CONFIG_JFS_DEBUG)
-int jfs_txanchor_read(char *buffer, char **start, off_t offset, int length,
-                      int *eof, void *data)
+static int jfs_txanchor_proc_show(struct seq_file *m, void *v)
 {
-        int len = 0;
-        off_t begin;
         char *freewait;
         char *freelockwait;
         char *lowlockwait;
@@ -3025,7 +3023,7 @@ int jfs_txanchor_read(char *buffer, char **start, off_t offset, int length,
         lowlockwait =
             waitqueue_active(&TxAnchor.lowlockwait) ? "active" : "empty";
 
-        len += sprintf(buffer,
+        seq_printf(m,
                        "JFS TxAnchor\n"
                        "============\n"
                        "freetid = %d\n"
@@ -3044,31 +3042,27 @@ int jfs_txanchor_read(char *buffer, char **start, off_t offset, int length,
                        TxAnchor.tlocksInUse,
                        jfs_tlocks_low,
                        list_empty(&TxAnchor.unlock_queue) ? "" : "not ");
+        return 0;
+}
 
-        begin = offset;
-        *start = buffer + begin;
-        len -= begin;
-
-        if (len > length)
-                len = length;
-        else
-                *eof = 1;
-
-        if (len < 0)
-                len = 0;
-
-        return len;
+static int jfs_txanchor_proc_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, jfs_txanchor_proc_show, NULL);
 }
+
+const struct file_operations jfs_txanchor_proc_fops = {
+        .owner          = THIS_MODULE,
+        .open           = jfs_txanchor_proc_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
 #endif
 
 #if defined(CONFIG_PROC_FS) && defined(CONFIG_JFS_STATISTICS)
-int jfs_txstats_read(char *buffer, char **start, off_t offset, int length,
-                     int *eof, void *data)
+static int jfs_txstats_proc_show(struct seq_file *m, void *v)
 {
-        int len = 0;
-        off_t begin;
-
-        len += sprintf(buffer,
+        seq_printf(m,
                        "JFS TxStats\n"
                        "===========\n"
                        "calls to txBegin = %d\n"
@@ -3089,19 +3083,19 @@ int jfs_txstats_read(char *buffer, char **start, off_t offset, int length,
                        TxStat.txBeginAnon_lockslow,
                        TxStat.txLockAlloc,
                        TxStat.txLockAlloc_freelock);
+        return 0;
+}
 
-        begin = offset;
-        *start = buffer + begin;
-        len -= begin;
-
-        if (len > length)
-                len = length;
-        else
-                *eof = 1;
-
-        if (len < 0)
-                len = 0;
-
-        return len;
+static int jfs_txstats_proc_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, jfs_txstats_proc_show, NULL);
 }
+
+const struct file_operations jfs_txstats_proc_fops = {
+        .owner          = THIS_MODULE,
+        .open           = jfs_txstats_proc_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
 #endif
diff --git a/fs/jfs/jfs_xtree.c b/fs/jfs/jfs_xtree.c
index 5a61ebf2cbcc..ae3acafb447b 100644
--- a/fs/jfs/jfs_xtree.c
+++ b/fs/jfs/jfs_xtree.c
@@ -20,7 +20,9 @@
  */
 
 #include <linux/fs.h>
+#include <linux/module.h>
 #include <linux/quotaops.h>
+#include <linux/seq_file.h>
 #include "jfs_incore.h"
 #include "jfs_filsys.h"
 #include "jfs_metapage.h"
@@ -4134,13 +4136,9 @@ s64 xtTruncate_pmap(tid_t tid, struct inode *ip, s64 committed_size)
 }
 
 #ifdef CONFIG_JFS_STATISTICS
-int jfs_xtstat_read(char *buffer, char **start, off_t offset, int length,
-                    int *eof, void *data)
+static int jfs_xtstat_proc_show(struct seq_file *m, void *v)
 {
-        int len = 0;
-        off_t begin;
-
-        len += sprintf(buffer,
+        seq_printf(m,
                        "JFS Xtree statistics\n"
                        "====================\n"
                        "searches = %d\n"
@@ -4149,19 +4147,19 @@ int jfs_xtstat_read(char *buffer, char **start, off_t offset, int length,
                        xtStat.search,
                        xtStat.fastSearch,
                        xtStat.split);
+        return 0;
+}
 
-        begin = offset;
-        *start = buffer + begin;
-        len -= begin;
-
-        if (len > length)
-                len = length;
-        else
-                *eof = 1;
-
-        if (len < 0)
-                len = 0;
-
-        return len;
+static int jfs_xtstat_proc_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, jfs_xtstat_proc_show, NULL);
 }
+
+const struct file_operations jfs_xtstat_proc_fops = {
+        .owner          = THIS_MODULE,
+        .open           = jfs_xtstat_proc_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
 #endif
diff --git a/fs/jfs/namei.c b/fs/jfs/namei.c
index 0ba6778edaa2..2aba82386810 100644
--- a/fs/jfs/namei.c
+++ b/fs/jfs/namei.c
@@ -1455,7 +1455,7 @@ static struct dentry *jfs_lookup(struct inode *dip, struct dentry *dentry, struc
                 free_UCSname(&key);
                 if (rc == -ENOENT) {
                         d_add(dentry, NULL);
-                        return ERR_PTR(0);
+                        return NULL;
                 } else if (rc) {
                         jfs_err("jfs_lookup: dtSearch returned %d", rc);
                         return ERR_PTR(rc);
diff --git a/fs/jfs/super.c b/fs/jfs/super.c
index 50ea65451732..0288e6d7936a 100644
--- a/fs/jfs/super.c
+++ b/fs/jfs/super.c
@@ -499,7 +499,7 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
         inode = jfs_iget(sb, ROOT_I);
         if (IS_ERR(inode)) {
                 ret = PTR_ERR(inode);
-                goto out_no_root;
+                goto out_no_rw;
         }
         sb->s_root = d_alloc_root(inode);
         if (!sb->s_root)
@@ -521,9 +521,8 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
         return 0;
 
 out_no_root:
-        jfs_err("jfs_read_super: get root inode failed");
-        if (inode)
-                iput(inode);
+        jfs_err("jfs_read_super: get root dentry failed");
+        iput(inode);
 
 out_no_rw:
         rc = jfs_umount(sb);