From: Christoph Hellwig <hch@lst.de>
To: Andrew Morton <akpm@linux-foundation.org>,
Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Alexey Dobriyan <adobriyan@gmail.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jiri Slaby <jslaby@suse.com>,
Alessandro Zummo <a.zummo@towertech.it>,
Alexandre Belloni <alexandre.belloni@bootlin.com>,
linux-acpi@vger.kernel.org, drbd-dev@lists.linbit.com,
linux-ide@vger.kernel.org, netdev@vger.kernel.org,
linux-rtc@vger.kernel.org, megaraidlinux.pdl@broadcom.com,
linux-scsi@vger.kernel.org, devel@driverdev.osuosl.org,
linux-afs@lists.infradead.org, linux-ext4@vger.kernel.org,
jfs-discussion@lists.sourceforge.net,
netfilter-devel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 23/42] afs: simplify procfs code
Date: Wed, 16 May 2018 11:43:27 +0200 [thread overview]
Message-ID: <20180516094346.20506-24-hch@lst.de> (raw)
In-Reply-To: <20180516094346.20506-1-hch@lst.de>
Use remove_proc_subtree to remove the whole subtree on cleanup, and
unwind the registration loop into individual calls. Switch to use
proc_create_seq where applicable.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
fs/afs/proc.c | 134 ++++++--------------------------------------------
1 file changed, 15 insertions(+), 119 deletions(-)
diff --git a/fs/afs/proc.c b/fs/afs/proc.c
index 839a22280606..3aad32762989 100644
--- a/fs/afs/proc.c
+++ b/fs/afs/proc.c
@@ -62,7 +62,6 @@ static const struct file_operations afs_proc_rootcell_fops = {
.llseek = no_llseek,
};
-static int afs_proc_cell_volumes_open(struct inode *inode, struct file *file);
static void *afs_proc_cell_volumes_start(struct seq_file *p, loff_t *pos);
static void *afs_proc_cell_volumes_next(struct seq_file *p, void *v,
loff_t *pos);
@@ -76,15 +75,6 @@ static const struct seq_operations afs_proc_cell_volumes_ops = {
.show = afs_proc_cell_volumes_show,
};
-static const struct file_operations afs_proc_cell_volumes_fops = {
- .open = afs_proc_cell_volumes_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release,
-};
-
-static int afs_proc_cell_vlservers_open(struct inode *inode,
- struct file *file);
static void *afs_proc_cell_vlservers_start(struct seq_file *p, loff_t *pos);
static void *afs_proc_cell_vlservers_next(struct seq_file *p, void *v,
loff_t *pos);
@@ -98,14 +88,6 @@ static const struct seq_operations afs_proc_cell_vlservers_ops = {
.show = afs_proc_cell_vlservers_show,
};
-static const struct file_operations afs_proc_cell_vlservers_fops = {
- .open = afs_proc_cell_vlservers_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release,
-};
-
-static int afs_proc_servers_open(struct inode *inode, struct file *file);
static void *afs_proc_servers_start(struct seq_file *p, loff_t *pos);
static void *afs_proc_servers_next(struct seq_file *p, void *v,
loff_t *pos);
@@ -119,13 +101,6 @@ static const struct seq_operations afs_proc_servers_ops = {
.show = afs_proc_servers_show,
};
-static const struct file_operations afs_proc_servers_fops = {
- .open = afs_proc_servers_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release,
-};
-
static int afs_proc_sysname_open(struct inode *inode, struct file *file);
static int afs_proc_sysname_release(struct inode *inode, struct file *file);
static void *afs_proc_sysname_start(struct seq_file *p, loff_t *pos);
@@ -152,7 +127,7 @@ static const struct file_operations afs_proc_sysname_fops = {
.write = afs_proc_sysname_write,
};
-static const struct file_operations afs_proc_stats_fops;
+static int afs_proc_stats_show(struct seq_file *m, void *v);
/*
* initialise the /proc/fs/afs/ directory
@@ -167,8 +142,8 @@ int afs_proc_init(struct afs_net *net)
if (!proc_create("cells", 0644, net->proc_afs, &afs_proc_cells_fops) ||
!proc_create("rootcell", 0644, net->proc_afs, &afs_proc_rootcell_fops) ||
- !proc_create("servers", 0644, net->proc_afs, &afs_proc_servers_fops) ||
- !proc_create("stats", 0644, net->proc_afs, &afs_proc_stats_fops) ||
+ !proc_create_seq("servers", 0644, net->proc_afs, &afs_proc_servers_ops) ||
+ !proc_create_single("stats", 0644, net->proc_afs, afs_proc_stats_show) ||
!proc_create("sysname", 0644, net->proc_afs, &afs_proc_sysname_fops))
goto error_tree;
@@ -196,16 +171,7 @@ void afs_proc_cleanup(struct afs_net *net)
*/
static int afs_proc_cells_open(struct inode *inode, struct file *file)
{
- struct seq_file *m;
- int ret;
-
- ret = seq_open(file, &afs_proc_cells_ops);
- if (ret < 0)
- return ret;
-
- m = file->private_data;
- m->private = PDE_DATA(inode);
- return 0;
+ return seq_open(file, &afs_proc_cells_ops);
}
/*
@@ -430,10 +396,11 @@ int afs_proc_cell_setup(struct afs_net *net, struct afs_cell *cell)
if (!dir)
goto error_dir;
- if (!proc_create_data("vlservers", 0, dir,
- &afs_proc_cell_vlservers_fops, cell) ||
- !proc_create_data("volumes", 0, dir,
- &afs_proc_cell_volumes_fops, cell))
+ if (!proc_create_seq_data("vlservers", 0, dir,
+ &afs_proc_cell_vlservers_ops, cell))
+ goto error_tree;
+ if (!proc_create_seq_data("volumes", 0, dir, &afs_proc_cell_volumes_ops,
+ cell))
goto error_tree;
_leave(" = 0");
@@ -458,29 +425,6 @@ void afs_proc_cell_remove(struct afs_net *net, struct afs_cell *cell)
_leave("");
}
-/*
- * open "/proc/fs/afs/<cell>/volumes" which provides a summary of extant cells
- */
-static int afs_proc_cell_volumes_open(struct inode *inode, struct file *file)
-{
- struct afs_cell *cell;
- struct seq_file *m;
- int ret;
-
- cell = PDE_DATA(inode);
- if (!cell)
- return -ENOENT;
-
- ret = seq_open(file, &afs_proc_cell_volumes_ops);
- if (ret < 0)
- return ret;
-
- m = file->private_data;
- m->private = cell;
-
- return 0;
-}
-
/*
* set up the iterator to start reading from the cells list and return the
* first item
@@ -488,7 +432,7 @@ static int afs_proc_cell_volumes_open(struct inode *inode, struct file *file)
static void *afs_proc_cell_volumes_start(struct seq_file *m, loff_t *_pos)
__acquires(cell->proc_lock)
{
- struct afs_cell *cell = m->private;
+ struct afs_cell *cell = PDE_DATA(file_inode(m->file));
_enter("cell=%p pos=%Ld", cell, *_pos);
@@ -502,7 +446,7 @@ static void *afs_proc_cell_volumes_start(struct seq_file *m, loff_t *_pos)
static void *afs_proc_cell_volumes_next(struct seq_file *p, void *v,
loff_t *_pos)
{
- struct afs_cell *cell = p->private;
+ struct afs_cell *cell = PDE_DATA(file_inode(p->file));
_enter("cell=%p pos=%Ld", cell, *_pos);
return seq_list_next(v, &cell->proc_volumes, _pos);
@@ -514,7 +458,7 @@ static void *afs_proc_cell_volumes_next(struct seq_file *p, void *v,
static void afs_proc_cell_volumes_stop(struct seq_file *p, void *v)
__releases(cell->proc_lock)
{
- struct afs_cell *cell = p->private;
+ struct afs_cell *cell = PDE_DATA(file_inode(p->file));
read_unlock(&cell->proc_lock);
}
@@ -530,7 +474,7 @@ static const char afs_vol_types[3][3] = {
*/
static int afs_proc_cell_volumes_show(struct seq_file *m, void *v)
{
- struct afs_cell *cell = m->private;
+ struct afs_cell *cell = PDE_DATA(file_inode(m->file));
struct afs_volume *vol = list_entry(v, struct afs_volume, proc_link);
/* Display header on line 1 */
@@ -546,30 +490,6 @@ static int afs_proc_cell_volumes_show(struct seq_file *m, void *v)
return 0;
}
-/*
- * open "/proc/fs/afs/<cell>/vlservers" which provides a list of volume
- * location server
- */
-static int afs_proc_cell_vlservers_open(struct inode *inode, struct file *file)
-{
- struct afs_cell *cell;
- struct seq_file *m;
- int ret;
-
- cell = PDE_DATA(inode);
- if (!cell)
- return -ENOENT;
-
- ret = seq_open(file, &afs_proc_cell_vlservers_ops);
- if (ret<0)
- return ret;
-
- m = file->private_data;
- m->private = cell;
-
- return 0;
-}
-
/*
* set up the iterator to start reading from the cells list and return the
* first item
@@ -578,7 +498,7 @@ static void *afs_proc_cell_vlservers_start(struct seq_file *m, loff_t *_pos)
__acquires(rcu)
{
struct afs_addr_list *alist;
- struct afs_cell *cell = m->private;
+ struct afs_cell *cell = PDE_DATA(file_inode(m->file));
loff_t pos = *_pos;
rcu_read_lock();
@@ -603,7 +523,7 @@ static void *afs_proc_cell_vlservers_next(struct seq_file *p, void *v,
loff_t *_pos)
{
struct afs_addr_list *alist;
- struct afs_cell *cell = p->private;
+ struct afs_cell *cell = PDE_DATA(file_inode(p->file));
loff_t pos;
alist = rcu_dereference(cell->vl_addrs);
@@ -643,15 +563,6 @@ static int afs_proc_cell_vlservers_show(struct seq_file *m, void *v)
return 0;
}
-/*
- * open "/proc/fs/afs/servers" which provides a summary of active
- * servers
- */
-static int afs_proc_servers_open(struct inode *inode, struct file *file)
-{
- return seq_open(file, &afs_proc_servers_ops);
-}
-
/*
* Set up the iterator to start reading from the server list and return the
* first item.
@@ -931,18 +842,3 @@ static int afs_proc_stats_show(struct seq_file *m, void *v)
atomic_long_read(&net->n_store_bytes));
return 0;
}
-
-/*
- * Open "/proc/fs/afs/stats" to allow reading of the stat counters.
- */
-static int afs_proc_stats_open(struct inode *inode, struct file *file)
-{
- return single_open(file, afs_proc_stats_show, NULL);
-}
-
-static const struct file_operations afs_proc_stats_fops = {
- .open = afs_proc_stats_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
--
2.17.0
next prev parent reply other threads:[~2018-05-16 9:43 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-16 9:43 simplify procfs code for seq_file instances V3 Christoph Hellwig
[not found] ` <20180516094346.20506-1-hch-jcswGhMUV9g@public.gmane.org>
2018-05-16 9:43 ` [PATCH 01/42] net/can: single_open_net needs to be paired with single_release_net Christoph Hellwig
2018-05-16 9:43 ` [PATCH 02/42] proc: introduce a proc_pid_ns helper Christoph Hellwig
2018-05-16 9:43 ` [PATCH 03/42] proc: don't detour through seq->private to get the inode Christoph Hellwig
2018-05-16 9:43 ` [PATCH 04/42] proc: simplify proc_register calling conventions Christoph Hellwig
2018-05-16 9:43 ` [PATCH 05/42] proc: add a proc_create_reg helper Christoph Hellwig
2018-05-16 9:43 ` [PATCH 06/42] proc: introduce proc_create_seq{,_data} Christoph Hellwig
2018-05-16 9:43 ` [PATCH 07/42] proc: introduce proc_create_seq_private Christoph Hellwig
2018-05-16 9:43 ` [PATCH 08/42] proc: introduce proc_create_single{,_data} Christoph Hellwig
2018-05-16 9:43 ` [PATCH 09/42] ipv{4,6}/udp{,lite}: simplify proc registration Christoph Hellwig
2018-05-16 9:43 ` [PATCH 10/42] ipv{4,6}/tcp: simplify procfs registration Christoph Hellwig
2018-05-16 9:43 ` [PATCH 11/42] ipv{4,6}/ping: simplify proc file creation Christoph Hellwig
2018-05-16 9:43 ` [PATCH 12/42] ipv{4, 6}/raw: simplify ѕeq_file code Christoph Hellwig
2018-05-16 9:43 ` [PATCH 13/42] ipv6/flowlabel: simplify pid namespace lookup Christoph Hellwig
2018-05-16 9:43 ` [PATCH 14/42] net/kcm: simplify proc registration Christoph Hellwig
2018-05-16 9:43 ` [PATCH 15/42] netfilter/x_tables: simplify ѕeq_file code Christoph Hellwig
2018-05-16 9:43 ` [PATCH 16/42] net: move seq_file_single_net to <linux/seq_file_net.h> Christoph Hellwig
2018-05-16 9:43 ` [PATCH 17/42] proc: introduce proc_create_net{,_data} Christoph Hellwig
2018-05-16 9:43 ` [PATCH 18/42] proc: introduce proc_create_net_single Christoph Hellwig
2018-05-16 9:43 ` [PATCH 19/42] acpi/battery: simplify procfs code Christoph Hellwig
2018-05-16 9:43 ` [PATCH 20/42] sgi-gru: " Christoph Hellwig
2018-05-16 9:43 ` [PATCH 21/42] megaraid: " Christoph Hellwig
2018-05-16 9:43 ` [PATCH 22/42] sg: " Christoph Hellwig
2018-05-16 9:43 ` Christoph Hellwig [this message]
2018-05-16 9:43 ` [PATCH 24/42] ext4: " Christoph Hellwig
2018-05-16 9:43 ` [PATCH 25/42] jfs: " Christoph Hellwig
2018-05-16 13:15 ` [Jfs-discussion] " Dave Kleikamp
2018-05-16 9:43 ` [PATCH 26/42] staging/rtl8192u: " Christoph Hellwig
2018-05-16 9:43 ` [PATCH 27/42] resource: switch to proc_create_seq_data Christoph Hellwig
2018-05-16 9:43 ` [PATCH 28/42] drbd: switch to proc_create_single Christoph Hellwig
[not found] ` <20180516094346.20506-29-hch-jcswGhMUV9g@public.gmane.org>
2018-05-18 12:55 ` Lars Ellenberg
2018-05-16 9:43 ` [PATCH 29/42] rtc/proc: switch to proc_create_single_data Christoph Hellwig
2018-05-16 9:43 ` [PATCH 30/42] bonding: switch to proc_create_seq_data Christoph Hellwig
2018-05-16 9:43 ` [PATCH 31/42] hostap: switch to proc_create_{seq,single}_data Christoph Hellwig
2018-05-16 9:43 ` [PATCH 32/42] neigh: switch to proc_create_seq_data Christoph Hellwig
2018-05-16 9:43 ` [PATCH 33/42] netfilter/xt_hashlimit: switch to proc_create_{seq, single}_data Christoph Hellwig
2018-05-16 9:43 ` [PATCH 34/42] netfilter/x_tables: switch to proc_create_seq_private Christoph Hellwig
2018-05-16 9:43 ` [PATCH 35/42] bluetooth: switch to proc_create_seq_data Christoph Hellwig
2018-05-16 9:43 ` [PATCH 36/42] atm: simplify procfs code Christoph Hellwig
2018-05-16 9:43 ` [PATCH 37/42] atm: switch to proc_create_seq_private Christoph Hellwig
2018-05-16 9:43 ` [PATCH 38/42] isdn: replace ->proc_fops with ->proc_show Christoph Hellwig
2018-05-18 8:43 ` Paul Bolle
[not found] ` <4e7091873e8a220c454a7ce5a3f52edc5b5c3e3a.camel-IWqWACnzNjzz+pZb47iToQ@public.gmane.org>
2018-05-18 8:58 ` Christoph Hellwig
2018-05-16 9:43 ` [PATCH 39/42] ide: remove ide_driver_proc_write Christoph Hellwig
2018-05-16 9:43 ` [PATCH 40/42] ide: replace ->proc_fops with ->proc_show Christoph Hellwig
2018-05-16 9:43 ` [PATCH 41/42] tty: " Christoph Hellwig
2018-05-16 9:58 ` Greg Kroah-Hartman
2018-05-16 9:43 ` [PATCH 42/42] proc: update SIZEOF_PDE_INLINE_NAME for the new pde fields Christoph Hellwig
2018-05-16 13:28 ` simplify procfs code for seq_file instances V3 Al Viro
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20180516094346.20506-24-hch@lst.de \
--to=hch@lst.de \
--cc=a.zummo@towertech.it \
--cc=adobriyan@gmail.com \
--cc=akpm@linux-foundation.org \
--cc=alexandre.belloni@bootlin.com \
--cc=devel@driverdev.osuosl.org \
--cc=drbd-dev@lists.linbit.com \
--cc=gregkh@linuxfoundation.org \
--cc=jfs-discussion@lists.sourceforge.net \
--cc=jslaby@suse.com \
--cc=linux-acpi@vger.kernel.org \
--cc=linux-afs@lists.infradead.org \
--cc=linux-ext4@vger.kernel.org \
--cc=linux-ide@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-rtc@vger.kernel.org \
--cc=linux-scsi@vger.kernel.org \
--cc=megaraidlinux.pdl@broadcom.com \
--cc=netdev@vger.kernel.org \
--cc=netfilter-devel@vger.kernel.org \
--cc=viro@zeniv.linux.org.uk \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).