[PATCH 38/39] ide: replace ->proc_fops with ->proc_show

From: Christoph Hellwig
Date: Thu Apr 19 2018 - 08:45:14 EST

Just set up the show callback in the tty_operations, and use
proc_create_single_data to create the file without additional
boilerplace code.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
drivers/ide/ide-cd.c | 15 +---
drivers/ide/ide-disk_proc.c | 62 ++--------------
drivers/ide/ide-floppy_proc.c | 17 +----
drivers/ide/ide-proc.c | 136 +++++-----------------------------
drivers/ide/ide-tape.c | 17 +----
include/linux/ide.h | 6 +-
6 files changed, 31 insertions(+), 222 deletions(-)

diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index 5a8e8e3c22cd..b52a7bdace52 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -1426,21 +1426,8 @@ static int idecd_capacity_proc_show(struct seq_file *m, void *v)
return 0;
}

-static int idecd_capacity_proc_open(struct inode *inode, struct file *file)
-{
- return single_open(file, idecd_capacity_proc_show, PDE_DATA(inode));
-}
-
-static const struct file_operations idecd_capacity_proc_fops = {
- .owner = THIS_MODULE,
- .open = idecd_capacity_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
static ide_proc_entry_t idecd_proc[] = {
- { "capacity", S_IFREG|S_IRUGO, &idecd_capacity_proc_fops },
+ { "capacity", S_IFREG|S_IRUGO, idecd_capacity_proc_show },
{}
};

diff --git a/drivers/ide/ide-disk_proc.c b/drivers/ide/ide-disk_proc.c
index 82a36ced4e96..95d239b2f646 100644
--- a/drivers/ide/ide-disk_proc.c
+++ b/drivers/ide/ide-disk_proc.c
@@ -52,19 +52,6 @@ static int idedisk_cache_proc_show(struct seq_file *m, void *v)
return 0;
}

-static int idedisk_cache_proc_open(struct inode *inode, struct file *file)
-{
- return single_open(file, idedisk_cache_proc_show, PDE_DATA(inode));
-}
-
-static const struct file_operations idedisk_cache_proc_fops = {
- .owner = THIS_MODULE,
- .open = idedisk_cache_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
static int idedisk_capacity_proc_show(struct seq_file *m, void *v)
{
ide_drive_t*drive = (ide_drive_t *)m->private;
@@ -73,19 +60,6 @@ static int idedisk_capacity_proc_show(struct seq_file *m, void *v)
return 0;
}

-static int idedisk_capacity_proc_open(struct inode *inode, struct file *file)
-{
- return single_open(file, idedisk_capacity_proc_show, PDE_DATA(inode));
-}
-
-static const struct file_operations idedisk_capacity_proc_fops = {
- .owner = THIS_MODULE,
- .open = idedisk_capacity_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
static int __idedisk_proc_show(struct seq_file *m, ide_drive_t *drive, u8 sub_cmd)
{
u8 *buf;
@@ -114,43 +88,17 @@ static int idedisk_sv_proc_show(struct seq_file *m, void *v)
return __idedisk_proc_show(m, m->private, ATA_SMART_READ_VALUES);
}

-static int idedisk_sv_proc_open(struct inode *inode, struct file *file)
-{
- return single_open(file, idedisk_sv_proc_show, PDE_DATA(inode));
-}
-
-static const struct file_operations idedisk_sv_proc_fops = {
- .owner = THIS_MODULE,
- .open = idedisk_sv_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
static int idedisk_st_proc_show(struct seq_file *m, void *v)
{
return __idedisk_proc_show(m, m->private, ATA_SMART_READ_THRESHOLDS);
}

-static int idedisk_st_proc_open(struct inode *inode, struct file *file)
-{
- return single_open(file, idedisk_st_proc_show, PDE_DATA(inode));
-}
-
-static const struct file_operations idedisk_st_proc_fops = {
- .owner = THIS_MODULE,
- .open = idedisk_st_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
ide_proc_entry_t ide_disk_proc[] = {
- { "cache", S_IFREG|S_IRUGO, &idedisk_cache_proc_fops },
- { "capacity", S_IFREG|S_IRUGO, &idedisk_capacity_proc_fops },
- { "geometry", S_IFREG|S_IRUGO, &ide_geometry_proc_fops },
- { "smart_values", S_IFREG|S_IRUSR, &idedisk_sv_proc_fops },
- { "smart_thresholds", S_IFREG|S_IRUSR, &idedisk_st_proc_fops },
+ { "cache", S_IFREG|S_IRUGO, idedisk_cache_proc_show },
+ { "capacity", S_IFREG|S_IRUGO, idedisk_capacity_proc_show },
+ { "geometry", S_IFREG|S_IRUGO, ide_geometry_proc_show },
+ { "smart_values", S_IFREG|S_IRUSR, idedisk_sv_proc_show },
+ { "smart_thresholds", S_IFREG|S_IRUSR, idedisk_st_proc_show },
{}
};

diff --git a/drivers/ide/ide-floppy_proc.c b/drivers/ide/ide-floppy_proc.c
index 471457ebea67..7f697ddb5fe5 100644
--- a/drivers/ide/ide-floppy_proc.c
+++ b/drivers/ide/ide-floppy_proc.c
@@ -14,22 +14,9 @@ static int idefloppy_capacity_proc_show(struct seq_file *m, void *v)
return 0;
}

-static int idefloppy_capacity_proc_open(struct inode *inode, struct file *file)
-{
- return single_open(file, idefloppy_capacity_proc_show, PDE_DATA(inode));
-}
-
-static const struct file_operations idefloppy_capacity_proc_fops = {
- .owner = THIS_MODULE,
- .open = idefloppy_capacity_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
ide_proc_entry_t ide_floppy_proc[] = {
- { "capacity", S_IFREG|S_IRUGO, &idefloppy_capacity_proc_fops },
- { "geometry", S_IFREG|S_IRUGO, &ide_geometry_proc_fops },
+ { "capacity", S_IFREG|S_IRUGO, idefloppy_capacity_proc_show },
+ { "geometry", S_IFREG|S_IRUGO, ide_geometry_proc_show },
{}
};

diff --git a/drivers/ide/ide-proc.c b/drivers/ide/ide-proc.c
index b3b8b8822d6a..45c997430332 100644
--- a/drivers/ide/ide-proc.c
+++ b/drivers/ide/ide-proc.c
@@ -56,19 +56,6 @@ static int ide_imodel_proc_show(struct seq_file *m, void *v)
return 0;
}

-static int ide_imodel_proc_open(struct inode *inode, struct file *file)
-{
- return single_open(file, ide_imodel_proc_show, PDE_DATA(inode));
-}
-
-static const struct file_operations ide_imodel_proc_fops = {
- .owner = THIS_MODULE,
- .open = ide_imodel_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
static int ide_mate_proc_show(struct seq_file *m, void *v)
{
ide_hwif_t *hwif = (ide_hwif_t *) m->private;
@@ -80,19 +67,6 @@ static int ide_mate_proc_show(struct seq_file *m, void *v)
return 0;
}

-static int ide_mate_proc_open(struct inode *inode, struct file *file)
-{
- return single_open(file, ide_mate_proc_show, PDE_DATA(inode));
-}
-
-static const struct file_operations ide_mate_proc_fops = {
- .owner = THIS_MODULE,
- .open = ide_mate_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
static int ide_channel_proc_show(struct seq_file *m, void *v)
{
ide_hwif_t *hwif = (ide_hwif_t *) m->private;
@@ -101,19 +75,6 @@ static int ide_channel_proc_show(struct seq_file *m, void *v)
return 0;
}

-static int ide_channel_proc_open(struct inode *inode, struct file *file)
-{
- return single_open(file, ide_channel_proc_show, PDE_DATA(inode));
-}
-
-static const struct file_operations ide_channel_proc_fops = {
- .owner = THIS_MODULE,
- .open = ide_channel_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
static int ide_identify_proc_show(struct seq_file *m, void *v)
{
ide_drive_t *drive = (ide_drive_t *)m->private;
@@ -141,19 +102,6 @@ static int ide_identify_proc_show(struct seq_file *m, void *v)
return 0;
}

-static int ide_identify_proc_open(struct inode *inode, struct file *file)
-{
- return single_open(file, ide_identify_proc_show, PDE_DATA(inode));
-}
-
-static const struct file_operations ide_identify_proc_fops = {
- .owner = THIS_MODULE,
- .open = ide_identify_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
/**
* ide_find_setting - find a specific setting
* @st: setting table pointer
@@ -441,27 +389,14 @@ static const struct file_operations ide_settings_proc_fops = {
.write = ide_settings_proc_write,
};

-static int ide_capacity_proc_show(struct seq_file *m, void *v)
+int ide_capacity_proc_show(struct seq_file *m, void *v)
{
seq_printf(m, "%llu\n", (long long)0x7fffffff);
return 0;
}
+EXPORT_SYMBOL_GPL(ide_capacity_proc_show);

-static int ide_capacity_proc_open(struct inode *inode, struct file *file)
-{
- return single_open(file, ide_capacity_proc_show, NULL);
-}
-
-const struct file_operations ide_capacity_proc_fops = {
- .owner = THIS_MODULE,
- .open = ide_capacity_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-EXPORT_SYMBOL_GPL(ide_capacity_proc_fops);
-
-static int ide_geometry_proc_show(struct seq_file *m, void *v)
+int ide_geometry_proc_show(struct seq_file *m, void *v)
{
ide_drive_t *drive = (ide_drive_t *) m->private;

@@ -471,20 +406,7 @@ static int ide_geometry_proc_show(struct seq_file *m, void *v)
drive->bios_cyl, drive->bios_head, drive->bios_sect);
return 0;
}
-
-static int ide_geometry_proc_open(struct inode *inode, struct file *file)
-{
- return single_open(file, ide_geometry_proc_show, PDE_DATA(inode));
-}
-
-const struct file_operations ide_geometry_proc_fops = {
- .owner = THIS_MODULE,
- .open = ide_geometry_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-EXPORT_SYMBOL(ide_geometry_proc_fops);
+EXPORT_SYMBOL(ide_geometry_proc_show);

static int ide_dmodel_proc_show(struct seq_file *seq, void *v)
{
@@ -495,19 +417,6 @@ static int ide_dmodel_proc_show(struct seq_file *seq, void *v)
return 0;
}

-static int ide_dmodel_proc_open(struct inode *inode, struct file *file)
-{
- return single_open(file, ide_dmodel_proc_show, PDE_DATA(inode));
-}
-
-static const struct file_operations ide_dmodel_proc_fops = {
- .owner = THIS_MODULE,
- .open = ide_dmodel_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
static int ide_driver_proc_show(struct seq_file *m, void *v)
{
ide_drive_t *drive = (ide_drive_t *)m->private;
@@ -523,19 +432,6 @@ static int ide_driver_proc_show(struct seq_file *m, void *v)
return 0;
}

-static int ide_driver_proc_open(struct inode *inode, struct file *file)
-{
- return single_open(file, ide_driver_proc_show, PDE_DATA(inode));
-}
-
-static const struct file_operations ide_driver_proc_fops = {
- .owner = THIS_MODULE,
- .open = ide_driver_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
static int ide_media_proc_show(struct seq_file *m, void *v)
{
ide_drive_t *drive = (ide_drive_t *) m->private;
@@ -567,11 +463,10 @@ static const struct file_operations ide_media_proc_fops = {
};

static ide_proc_entry_t generic_drive_entries[] = {
- { "driver", S_IFREG|S_IRUGO, &ide_driver_proc_fops },
- { "identify", S_IFREG|S_IRUSR, &ide_identify_proc_fops},
- { "media", S_IFREG|S_IRUGO, &ide_media_proc_fops },
- { "model", S_IFREG|S_IRUGO, &ide_dmodel_proc_fops },
- { "settings", S_IFREG|S_IRUSR|S_IWUSR, &ide_settings_proc_fops},
+ { "driver", S_IFREG|S_IRUGO, ide_driver_proc_show },
+ { "identify", S_IFREG|S_IRUSR, ide_identify_proc_show },
+ { "media", S_IFREG|S_IRUGO, ide_media_proc_show },
+ { "model", S_IFREG|S_IRUGO, ide_dmodel_proc_show },
{}
};

@@ -582,7 +477,7 @@ static void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p
if (!dir || !p)
return;
while (p->name != NULL) {
- ent = proc_create_data(p->name, p->mode, dir, p->proc_fops, data);
+ ent = proc_create_single_data(p->name, p->mode, dir, p->show, data);
if (!ent) return;
p++;
}
@@ -647,8 +542,12 @@ void ide_proc_port_register_devices(ide_hwif_t *hwif)
continue;

drive->proc = proc_mkdir(drive->name, parent);
- if (drive->proc)
+ if (drive->proc) {
ide_add_proc_entries(drive->proc, generic_drive_entries, drive);
+ proc_create_data("setting", S_IFREG|S_IRUSR|S_IWUSR,
+ drive->proc, &ide_settings_proc_fops,
+ drive);
+ }
sprintf(name, "ide%d/%s", (drive->name[2]-'a')/2, drive->name);
ent = proc_symlink(drive->name, proc_ide_root, name);
if (!ent) return;
@@ -658,6 +557,7 @@ void ide_proc_port_register_devices(ide_hwif_t *hwif)
void ide_proc_unregister_device(ide_drive_t *drive)
{
if (drive->proc) {
+ remove_proc_entry("settings", drive->proc);
ide_remove_proc_entries(drive->proc, generic_drive_entries);
remove_proc_entry(drive->name, proc_ide_root);
remove_proc_entry(drive->name, drive->hwif->proc);
@@ -666,9 +566,9 @@ void ide_proc_unregister_device(ide_drive_t *drive)
}

static ide_proc_entry_t hwif_entries[] = {
- { "channel", S_IFREG|S_IRUGO, &ide_channel_proc_fops },
- { "mate", S_IFREG|S_IRUGO, &ide_mate_proc_fops },
- { "model", S_IFREG|S_IRUGO, &ide_imodel_proc_fops },
+ { "channel", S_IFREG|S_IRUGO, ide_channel_proc_show },
+ { "mate", S_IFREG|S_IRUGO, ide_mate_proc_show },
+ { "model", S_IFREG|S_IRUGO, ide_imodel_proc_show },
{}
};

diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index fd57e8ccc47a..ac2c6820c65a 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -1847,22 +1847,9 @@ static int idetape_name_proc_show(struct seq_file *m, void *v)
return 0;
}

-static int idetape_name_proc_open(struct inode *inode, struct file *file)
-{
- return single_open(file, idetape_name_proc_show, PDE_DATA(inode));
-}
-
-static const struct file_operations idetape_name_proc_fops = {
- .owner = THIS_MODULE,
- .open = idetape_name_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
static ide_proc_entry_t idetape_proc[] = {
- { "capacity", S_IFREG|S_IRUGO, &ide_capacity_proc_fops },
- { "name", S_IFREG|S_IRUGO, &idetape_name_proc_fops },
+ { "capacity", S_IFREG|S_IRUGO, ide_capacity_proc_show },
+ { "name", S_IFREG|S_IRUGO, idetape_name_proc_show },
{}
};

diff --git a/include/linux/ide.h b/include/linux/ide.h
index ca9d34feb572..752464f5a772 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -961,7 +961,7 @@ __IDE_PROC_DEVSET(_name, _min, _max, NULL, NULL)
typedef struct {
const char *name;
umode_t mode;
- const struct file_operations *proc_fops;
+ int (*show)(struct seq_file *, void *);
} ide_proc_entry_t;

void proc_ide_create(void);
@@ -973,8 +973,8 @@ void ide_proc_unregister_port(ide_hwif_t *);
void ide_proc_register_driver(ide_drive_t *, struct ide_driver *);
void ide_proc_unregister_driver(ide_drive_t *, struct ide_driver *);

-extern const struct file_operations ide_capacity_proc_fops;
-extern const struct file_operations ide_geometry_proc_fops;
+int ide_capacity_proc_show(struct seq_file *m, void *v);
+int ide_geometry_proc_show(struct seq_file *m, void *v);
#else
static inline void proc_ide_create(void) { ; }
static inline void proc_ide_destroy(void) { ; }
--
2.17.0