JFS: switch to seq_files

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>

diff --git a/fs/jfs/jfs_debug.c b/fs/jfs/jfs_debug.c
index bf6ab19..6a73de8 100644 (file)
--- 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 044c1e6..eafd130 100644 (file)
--- 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_logmgr.c b/fs/jfs/jfs_logmgr.c
index 325a967..cd2ec29 100644 (file)
--- 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 d1e64f2..854ff0e 100644 (file)
--- 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 e7c60ae..f26e4d0 100644 (file)
--- 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 5a61ebf..ae3acaf 100644 (file)
--- 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