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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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![Tejun Heo](/assets/img/avatar_default.png)
percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
312 lines
7.2 KiB
C
312 lines
7.2 KiB
C
#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
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#ifdef CONFIG_PROC_FS
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/proc_fs.h>
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#include <linux/time.h>
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#include <linux/seq_file.h>
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#include <linux/uaccess.h>
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#include <linux/atmmpc.h>
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#include <linux/atm.h>
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#include <linux/gfp.h>
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#include "mpc.h"
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#include "mpoa_caches.h"
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/*
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* mpoa_proc.c: Implementation MPOA client's proc
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* file system statistics
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*/
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#if 1
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#define dprintk(format, args...) \
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printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args) /* debug */
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#else
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#define dprintk(format, args...) \
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do { if (0) \
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printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args);\
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} while (0)
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#endif
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#if 0
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#define ddprintk(format, args...) \
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printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args) /* debug */
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#else
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#define ddprintk(format, args...) \
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do { if (0) \
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printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args);\
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} while (0)
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#endif
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#define STAT_FILE_NAME "mpc" /* Our statistic file's name */
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extern struct mpoa_client *mpcs;
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extern struct proc_dir_entry *atm_proc_root; /* from proc.c. */
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static int proc_mpc_open(struct inode *inode, struct file *file);
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static ssize_t proc_mpc_write(struct file *file, const char __user *buff,
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size_t nbytes, loff_t *ppos);
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static int parse_qos(const char *buff);
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/*
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* Define allowed FILE OPERATIONS
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*/
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static const struct file_operations mpc_file_operations = {
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.owner = THIS_MODULE,
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.open = proc_mpc_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.write = proc_mpc_write,
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.release = seq_release,
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};
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/*
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* Returns the state of an ingress cache entry as a string
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*/
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static const char *ingress_state_string(int state)
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{
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switch (state) {
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case INGRESS_RESOLVING:
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return "resolving ";
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case INGRESS_RESOLVED:
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return "resolved ";
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case INGRESS_INVALID:
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return "invalid ";
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case INGRESS_REFRESHING:
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return "refreshing ";
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}
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return "";
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}
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/*
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* Returns the state of an egress cache entry as a string
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*/
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static const char *egress_state_string(int state)
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{
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switch (state) {
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case EGRESS_RESOLVED:
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return "resolved ";
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case EGRESS_PURGE:
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return "purge ";
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case EGRESS_INVALID:
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return "invalid ";
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}
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return "";
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}
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/*
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* FIXME: mpcs (and per-mpc lists) have no locking whatsoever.
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*/
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static void *mpc_start(struct seq_file *m, loff_t *pos)
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{
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loff_t l = *pos;
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struct mpoa_client *mpc;
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if (!l--)
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return SEQ_START_TOKEN;
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for (mpc = mpcs; mpc; mpc = mpc->next)
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if (!l--)
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return mpc;
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return NULL;
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}
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static void *mpc_next(struct seq_file *m, void *v, loff_t *pos)
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{
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struct mpoa_client *p = v;
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(*pos)++;
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return v == SEQ_START_TOKEN ? mpcs : p->next;
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}
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static void mpc_stop(struct seq_file *m, void *v)
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{
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}
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/*
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* READING function - called when the /proc/atm/mpoa file is read from.
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*/
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static int mpc_show(struct seq_file *m, void *v)
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{
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struct mpoa_client *mpc = v;
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int i;
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in_cache_entry *in_entry;
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eg_cache_entry *eg_entry;
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struct timeval now;
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unsigned char ip_string[16];
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if (v == SEQ_START_TOKEN) {
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atm_mpoa_disp_qos(m);
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return 0;
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}
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seq_printf(m, "\nInterface %d:\n\n", mpc->dev_num);
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seq_printf(m, "Ingress Entries:\nIP address State Holding time Packets fwded VPI VCI\n");
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do_gettimeofday(&now);
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for (in_entry = mpc->in_cache; in_entry; in_entry = in_entry->next) {
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sprintf(ip_string, "%pI4", &in_entry->ctrl_info.in_dst_ip);
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seq_printf(m, "%-16s%s%-14lu%-12u",
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ip_string,
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ingress_state_string(in_entry->entry_state),
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in_entry->ctrl_info.holding_time -
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(now.tv_sec-in_entry->tv.tv_sec),
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in_entry->packets_fwded);
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if (in_entry->shortcut)
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seq_printf(m, " %-3d %-3d",
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in_entry->shortcut->vpi,
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in_entry->shortcut->vci);
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seq_printf(m, "\n");
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}
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seq_printf(m, "\n");
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seq_printf(m, "Egress Entries:\nIngress MPC ATM addr\nCache-id State Holding time Packets recvd Latest IP addr VPI VCI\n");
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for (eg_entry = mpc->eg_cache; eg_entry; eg_entry = eg_entry->next) {
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unsigned char *p = eg_entry->ctrl_info.in_MPC_data_ATM_addr;
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for (i = 0; i < ATM_ESA_LEN; i++)
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seq_printf(m, "%02x", p[i]);
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seq_printf(m, "\n%-16lu%s%-14lu%-15u",
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(unsigned long)ntohl(eg_entry->ctrl_info.cache_id),
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egress_state_string(eg_entry->entry_state),
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(eg_entry->ctrl_info.holding_time -
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(now.tv_sec-eg_entry->tv.tv_sec)),
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eg_entry->packets_rcvd);
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/* latest IP address */
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sprintf(ip_string, "%pI4", &eg_entry->latest_ip_addr);
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seq_printf(m, "%-16s", ip_string);
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if (eg_entry->shortcut)
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seq_printf(m, " %-3d %-3d",
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eg_entry->shortcut->vpi,
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eg_entry->shortcut->vci);
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seq_printf(m, "\n");
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}
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seq_printf(m, "\n");
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return 0;
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}
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static const struct seq_operations mpc_op = {
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.start = mpc_start,
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.next = mpc_next,
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.stop = mpc_stop,
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.show = mpc_show
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};
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static int proc_mpc_open(struct inode *inode, struct file *file)
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{
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return seq_open(file, &mpc_op);
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}
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static ssize_t proc_mpc_write(struct file *file, const char __user *buff,
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size_t nbytes, loff_t *ppos)
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{
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char *page, *p;
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unsigned len;
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if (nbytes == 0)
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return 0;
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if (nbytes >= PAGE_SIZE)
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nbytes = PAGE_SIZE-1;
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page = (char *)__get_free_page(GFP_KERNEL);
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if (!page)
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return -ENOMEM;
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for (p = page, len = 0; len < nbytes; p++, len++) {
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if (get_user(*p, buff++)) {
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free_page((unsigned long)page);
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return -EFAULT;
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}
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if (*p == '\0' || *p == '\n')
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break;
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}
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*p = '\0';
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if (!parse_qos(page))
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printk("mpoa: proc_mpc_write: could not parse '%s'\n", page);
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free_page((unsigned long)page);
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return len;
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}
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static int parse_qos(const char *buff)
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{
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/* possible lines look like this
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* add 130.230.54.142 tx=max_pcr,max_sdu rx=max_pcr,max_sdu
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*/
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unsigned char ip[4];
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int tx_pcr, tx_sdu, rx_pcr, rx_sdu;
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__be32 ipaddr;
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struct atm_qos qos;
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memset(&qos, 0, sizeof(struct atm_qos));
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if (sscanf(buff, "del %hhu.%hhu.%hhu.%hhu",
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ip, ip+1, ip+2, ip+3) == 4) {
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ipaddr = *(__be32 *)ip;
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return atm_mpoa_delete_qos(atm_mpoa_search_qos(ipaddr));
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}
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if (sscanf(buff, "add %hhu.%hhu.%hhu.%hhu tx=%d,%d rx=tx",
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ip, ip+1, ip+2, ip+3, &tx_pcr, &tx_sdu) == 6) {
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rx_pcr = tx_pcr;
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rx_sdu = tx_sdu;
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} else if (sscanf(buff, "add %hhu.%hhu.%hhu.%hhu tx=%d,%d rx=%d,%d",
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ip, ip+1, ip+2, ip+3, &tx_pcr, &tx_sdu, &rx_pcr, &rx_sdu) != 8)
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return 0;
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ipaddr = *(__be32 *)ip;
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qos.txtp.traffic_class = ATM_CBR;
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qos.txtp.max_pcr = tx_pcr;
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qos.txtp.max_sdu = tx_sdu;
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qos.rxtp.traffic_class = ATM_CBR;
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qos.rxtp.max_pcr = rx_pcr;
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qos.rxtp.max_sdu = rx_sdu;
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qos.aal = ATM_AAL5;
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dprintk("parse_qos(): setting qos paramameters to tx=%d,%d rx=%d,%d\n",
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qos.txtp.max_pcr, qos.txtp.max_sdu,
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qos.rxtp.max_pcr, qos.rxtp.max_sdu);
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atm_mpoa_add_qos(ipaddr, &qos);
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return 1;
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}
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/*
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* INITIALIZATION function - called when module is initialized/loaded.
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*/
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int mpc_proc_init(void)
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{
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struct proc_dir_entry *p;
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p = proc_create(STAT_FILE_NAME, 0, atm_proc_root, &mpc_file_operations);
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if (!p) {
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pr_err("Unable to initialize /proc/atm/%s\n", STAT_FILE_NAME);
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return -ENOMEM;
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}
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return 0;
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}
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/*
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* DELETING function - called when module is removed.
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*/
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void mpc_proc_clean(void)
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{
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remove_proc_entry(STAT_FILE_NAME, atm_proc_root);
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}
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#endif /* CONFIG_PROC_FS */
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