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authorJ. Bruce Fields <bfields@citi.umich.edu>2009-08-21 11:27:29 -0400
committerJ. Bruce Fields <bfields@citi.umich.edu>2009-08-21 11:27:29 -0400
commite9dc122166b8d863d3057a66ada04838e5548e52 (patch)
tree749e15bf719b64bf9113db7acd8e043d9742cb26 /net/sunrpc/cache.c
parent560ab42ef923aaf2e4347315bdfcc74b2708972c (diff)
parent405d8f8b1d936414da2093d4149ff790ff3f84a5 (diff)
Merge branch 'nfs-for-2.6.32' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6 into for-2.6.32-incoming
Conflicts: net/sunrpc/cache.c
Diffstat (limited to 'net/sunrpc/cache.c')
-rw-r--r--net/sunrpc/cache.c622
1 files changed, 473 insertions, 149 deletions
diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c
index bbd31f1215e7..ade8a7e99cd3 100644
--- a/net/sunrpc/cache.c
+++ b/net/sunrpc/cache.c
@@ -27,10 +27,12 @@
27#include <linux/net.h> 27#include <linux/net.h>
28#include <linux/workqueue.h> 28#include <linux/workqueue.h>
29#include <linux/mutex.h> 29#include <linux/mutex.h>
30#include <linux/pagemap.h>
30#include <asm/ioctls.h> 31#include <asm/ioctls.h>
31#include <linux/sunrpc/types.h> 32#include <linux/sunrpc/types.h>
32#include <linux/sunrpc/cache.h> 33#include <linux/sunrpc/cache.h>
33#include <linux/sunrpc/stats.h> 34#include <linux/sunrpc/stats.h>
35#include <linux/sunrpc/rpc_pipe_fs.h>
34 36
35#define RPCDBG_FACILITY RPCDBG_CACHE 37#define RPCDBG_FACILITY RPCDBG_CACHE
36 38
@@ -175,7 +177,12 @@ struct cache_head *sunrpc_cache_update(struct cache_detail *detail,
175} 177}
176EXPORT_SYMBOL_GPL(sunrpc_cache_update); 178EXPORT_SYMBOL_GPL(sunrpc_cache_update);
177 179
178static int cache_make_upcall(struct cache_detail *detail, struct cache_head *h); 180static int cache_make_upcall(struct cache_detail *cd, struct cache_head *h)
181{
182 if (!cd->cache_upcall)
183 return -EINVAL;
184 return cd->cache_upcall(cd, h);
185}
179 186
180static inline int cache_is_valid(struct cache_detail *detail, struct cache_head *h) 187static inline int cache_is_valid(struct cache_detail *detail, struct cache_head *h)
181{ 188{
@@ -192,6 +199,7 @@ static inline int cache_is_valid(struct cache_detail *detail, struct cache_head
192 return 0; 199 return 0;
193 } 200 }
194} 201}
202
195/* 203/*
196 * This is the generic cache management routine for all 204 * This is the generic cache management routine for all
197 * the authentication caches. 205 * the authentication caches.
@@ -297,76 +305,11 @@ static DEFINE_SPINLOCK(cache_list_lock);
297static struct cache_detail *current_detail; 305static struct cache_detail *current_detail;
298static int current_index; 306static int current_index;
299 307
300static const struct file_operations cache_file_operations;
301static const struct file_operations content_file_operations;
302static const struct file_operations cache_flush_operations;
303
304static void do_cache_clean(struct work_struct *work); 308static void do_cache_clean(struct work_struct *work);
305static DECLARE_DELAYED_WORK(cache_cleaner, do_cache_clean); 309static DECLARE_DELAYED_WORK(cache_cleaner, do_cache_clean);
306 310
307static void remove_cache_proc_entries(struct cache_detail *cd) 311static void sunrpc_init_cache_detail(struct cache_detail *cd)
308{
309 if (cd->proc_ent == NULL)
310 return;
311 if (cd->flush_ent)
312 remove_proc_entry("flush", cd->proc_ent);
313 if (cd->channel_ent)
314 remove_proc_entry("channel", cd->proc_ent);
315 if (cd->content_ent)
316 remove_proc_entry("content", cd->proc_ent);
317 cd->proc_ent = NULL;
318 remove_proc_entry(cd->name, proc_net_rpc);
319}
320
321#ifdef CONFIG_PROC_FS
322static int create_cache_proc_entries(struct cache_detail *cd)
323{
324 struct proc_dir_entry *p;
325
326 cd->proc_ent = proc_mkdir(cd->name, proc_net_rpc);
327 if (cd->proc_ent == NULL)
328 goto out_nomem;
329 cd->channel_ent = cd->content_ent = NULL;
330
331 p = proc_create_data("flush", S_IFREG|S_IRUSR|S_IWUSR,
332 cd->proc_ent, &cache_flush_operations, cd);
333 cd->flush_ent = p;
334 if (p == NULL)
335 goto out_nomem;
336
337 if (cd->cache_request || cd->cache_parse) {
338 p = proc_create_data("channel", S_IFREG|S_IRUSR|S_IWUSR,
339 cd->proc_ent, &cache_file_operations, cd);
340 cd->channel_ent = p;
341 if (p == NULL)
342 goto out_nomem;
343 }
344 if (cd->cache_show) {
345 p = proc_create_data("content", S_IFREG|S_IRUSR|S_IWUSR,
346 cd->proc_ent, &content_file_operations, cd);
347 cd->content_ent = p;
348 if (p == NULL)
349 goto out_nomem;
350 }
351 return 0;
352out_nomem:
353 remove_cache_proc_entries(cd);
354 return -ENOMEM;
355}
356#else /* CONFIG_PROC_FS */
357static int create_cache_proc_entries(struct cache_detail *cd)
358{
359 return 0;
360}
361#endif
362
363int cache_register(struct cache_detail *cd)
364{ 312{
365 int ret;
366
367 ret = create_cache_proc_entries(cd);
368 if (ret)
369 return ret;
370 rwlock_init(&cd->hash_lock); 313 rwlock_init(&cd->hash_lock);
371 INIT_LIST_HEAD(&cd->queue); 314 INIT_LIST_HEAD(&cd->queue);
372 spin_lock(&cache_list_lock); 315 spin_lock(&cache_list_lock);
@@ -380,11 +323,9 @@ int cache_register(struct cache_detail *cd)
380 323
381 /* start the cleaning process */ 324 /* start the cleaning process */
382 schedule_delayed_work(&cache_cleaner, 0); 325 schedule_delayed_work(&cache_cleaner, 0);
383 return 0;
384} 326}
385EXPORT_SYMBOL_GPL(cache_register);
386 327
387void cache_unregister(struct cache_detail *cd) 328static void sunrpc_destroy_cache_detail(struct cache_detail *cd)
388{ 329{
389 cache_purge(cd); 330 cache_purge(cd);
390 spin_lock(&cache_list_lock); 331 spin_lock(&cache_list_lock);
@@ -399,7 +340,6 @@ void cache_unregister(struct cache_detail *cd)
399 list_del_init(&cd->others); 340 list_del_init(&cd->others);
400 write_unlock(&cd->hash_lock); 341 write_unlock(&cd->hash_lock);
401 spin_unlock(&cache_list_lock); 342 spin_unlock(&cache_list_lock);
402 remove_cache_proc_entries(cd);
403 if (list_empty(&cache_list)) { 343 if (list_empty(&cache_list)) {
404 /* module must be being unloaded so its safe to kill the worker */ 344 /* module must be being unloaded so its safe to kill the worker */
405 cancel_delayed_work_sync(&cache_cleaner); 345 cancel_delayed_work_sync(&cache_cleaner);
@@ -408,7 +348,6 @@ void cache_unregister(struct cache_detail *cd)
408out: 348out:
409 printk(KERN_ERR "nfsd: failed to unregister %s cache\n", cd->name); 349 printk(KERN_ERR "nfsd: failed to unregister %s cache\n", cd->name);
410} 350}
411EXPORT_SYMBOL_GPL(cache_unregister);
412 351
413/* clean cache tries to find something to clean 352/* clean cache tries to find something to clean
414 * and cleans it. 353 * and cleans it.
@@ -703,18 +642,18 @@ struct cache_reader {
703 int offset; /* if non-0, we have a refcnt on next request */ 642 int offset; /* if non-0, we have a refcnt on next request */
704}; 643};
705 644
706static ssize_t 645static ssize_t cache_read(struct file *filp, char __user *buf, size_t count,
707cache_read(struct file *filp, char __user *buf, size_t count, loff_t *ppos) 646 loff_t *ppos, struct cache_detail *cd)
708{ 647{
709 struct cache_reader *rp = filp->private_data; 648 struct cache_reader *rp = filp->private_data;
710 struct cache_request *rq; 649 struct cache_request *rq;
711 struct cache_detail *cd = PDE(filp->f_path.dentry->d_inode)->data; 650 struct inode *inode = filp->f_path.dentry->d_inode;
712 int err; 651 int err;
713 652
714 if (count == 0) 653 if (count == 0)
715 return 0; 654 return 0;
716 655
717 mutex_lock(&queue_io_mutex); /* protect against multiple concurrent 656 mutex_lock(&inode->i_mutex); /* protect against multiple concurrent
718 * readers on this file */ 657 * readers on this file */
719 again: 658 again:
720 spin_lock(&queue_lock); 659 spin_lock(&queue_lock);
@@ -727,7 +666,7 @@ cache_read(struct file *filp, char __user *buf, size_t count, loff_t *ppos)
727 } 666 }
728 if (rp->q.list.next == &cd->queue) { 667 if (rp->q.list.next == &cd->queue) {
729 spin_unlock(&queue_lock); 668 spin_unlock(&queue_lock);
730 mutex_unlock(&queue_io_mutex); 669 mutex_unlock(&inode->i_mutex);
731 BUG_ON(rp->offset); 670 BUG_ON(rp->offset);
732 return 0; 671 return 0;
733 } 672 }
@@ -774,49 +713,90 @@ cache_read(struct file *filp, char __user *buf, size_t count, loff_t *ppos)
774 } 713 }
775 if (err == -EAGAIN) 714 if (err == -EAGAIN)
776 goto again; 715 goto again;
777 mutex_unlock(&queue_io_mutex); 716 mutex_unlock(&inode->i_mutex);
778 return err ? err : count; 717 return err ? err : count;
779} 718}
780 719
781static char write_buf[8192]; /* protected by queue_io_mutex */ 720static ssize_t cache_do_downcall(char *kaddr, const char __user *buf,
721 size_t count, struct cache_detail *cd)
722{
723 ssize_t ret;
782 724
783static ssize_t 725 if (copy_from_user(kaddr, buf, count))
784cache_write(struct file *filp, const char __user *buf, size_t count, 726 return -EFAULT;
785 loff_t *ppos) 727 kaddr[count] = '\0';
728 ret = cd->cache_parse(cd, kaddr, count);
729 if (!ret)
730 ret = count;
731 return ret;
732}
733
734static ssize_t cache_slow_downcall(const char __user *buf,
735 size_t count, struct cache_detail *cd)
786{ 736{
787 int err; 737 static char write_buf[8192]; /* protected by queue_io_mutex */
788 struct cache_detail *cd = PDE(filp->f_path.dentry->d_inode)->data; 738 ssize_t ret = -EINVAL;
789 739
790 if (count == 0)
791 return 0;
792 if (count >= sizeof(write_buf)) 740 if (count >= sizeof(write_buf))
793 return -EINVAL; 741 goto out;
794
795 mutex_lock(&queue_io_mutex); 742 mutex_lock(&queue_io_mutex);
743 ret = cache_do_downcall(write_buf, buf, count, cd);
744 mutex_unlock(&queue_io_mutex);
745out:
746 return ret;
747}
796 748
797 if (copy_from_user(write_buf, buf, count)) { 749static ssize_t cache_downcall(struct address_space *mapping,
798 mutex_unlock(&queue_io_mutex); 750 const char __user *buf,
799 return -EFAULT; 751 size_t count, struct cache_detail *cd)
800 } 752{
801 write_buf[count] = '\0'; 753 struct page *page;
802 if (cd->cache_parse) 754 char *kaddr;
803 err = cd->cache_parse(cd, write_buf, count); 755 ssize_t ret = -ENOMEM;
804 else 756
805 err = -EINVAL; 757 if (count >= PAGE_CACHE_SIZE)
758 goto out_slow;
759
760 page = find_or_create_page(mapping, 0, GFP_KERNEL);
761 if (!page)
762 goto out_slow;
763
764 kaddr = kmap(page);
765 ret = cache_do_downcall(kaddr, buf, count, cd);
766 kunmap(page);
767 unlock_page(page);
768 page_cache_release(page);
769 return ret;
770out_slow:
771 return cache_slow_downcall(buf, count, cd);
772}
806 773
807 mutex_unlock(&queue_io_mutex); 774static ssize_t cache_write(struct file *filp, const char __user *buf,
808 return err ? err : count; 775 size_t count, loff_t *ppos,
776 struct cache_detail *cd)
777{
778 struct address_space *mapping = filp->f_mapping;
779 struct inode *inode = filp->f_path.dentry->d_inode;
780 ssize_t ret = -EINVAL;
781
782 if (!cd->cache_parse)
783 goto out;
784
785 mutex_lock(&inode->i_mutex);
786 ret = cache_downcall(mapping, buf, count, cd);
787 mutex_unlock(&inode->i_mutex);
788out:
789 return ret;
809} 790}
810 791
811static DECLARE_WAIT_QUEUE_HEAD(queue_wait); 792static DECLARE_WAIT_QUEUE_HEAD(queue_wait);
812 793
813static unsigned int 794static unsigned int cache_poll(struct file *filp, poll_table *wait,
814cache_poll(struct file *filp, poll_table *wait) 795 struct cache_detail *cd)
815{ 796{
816 unsigned int mask; 797 unsigned int mask;
817 struct cache_reader *rp = filp->private_data; 798 struct cache_reader *rp = filp->private_data;
818 struct cache_queue *cq; 799 struct cache_queue *cq;
819 struct cache_detail *cd = PDE(filp->f_path.dentry->d_inode)->data;
820 800
821 poll_wait(filp, &queue_wait, wait); 801 poll_wait(filp, &queue_wait, wait);
822 802
@@ -838,14 +818,13 @@ cache_poll(struct file *filp, poll_table *wait)
838 return mask; 818 return mask;
839} 819}
840 820
841static int 821static int cache_ioctl(struct inode *ino, struct file *filp,
842cache_ioctl(struct inode *ino, struct file *filp, 822 unsigned int cmd, unsigned long arg,
843 unsigned int cmd, unsigned long arg) 823 struct cache_detail *cd)
844{ 824{
845 int len = 0; 825 int len = 0;
846 struct cache_reader *rp = filp->private_data; 826 struct cache_reader *rp = filp->private_data;
847 struct cache_queue *cq; 827 struct cache_queue *cq;
848 struct cache_detail *cd = PDE(ino)->data;
849 828
850 if (cmd != FIONREAD || !rp) 829 if (cmd != FIONREAD || !rp)
851 return -EINVAL; 830 return -EINVAL;
@@ -868,15 +847,15 @@ cache_ioctl(struct inode *ino, struct file *filp,
868 return put_user(len, (int __user *)arg); 847 return put_user(len, (int __user *)arg);
869} 848}
870 849
871static int 850static int cache_open(struct inode *inode, struct file *filp,
872cache_open(struct inode *inode, struct file *filp) 851 struct cache_detail *cd)
873{ 852{
874 struct cache_reader *rp = NULL; 853 struct cache_reader *rp = NULL;
875 854
855 if (!cd || !try_module_get(cd->owner))
856 return -EACCES;
876 nonseekable_open(inode, filp); 857 nonseekable_open(inode, filp);
877 if (filp->f_mode & FMODE_READ) { 858 if (filp->f_mode & FMODE_READ) {
878 struct cache_detail *cd = PDE(inode)->data;
879
880 rp = kmalloc(sizeof(*rp), GFP_KERNEL); 859 rp = kmalloc(sizeof(*rp), GFP_KERNEL);
881 if (!rp) 860 if (!rp)
882 return -ENOMEM; 861 return -ENOMEM;
@@ -891,11 +870,10 @@ cache_open(struct inode *inode, struct file *filp)
891 return 0; 870 return 0;
892} 871}
893 872
894static int 873static int cache_release(struct inode *inode, struct file *filp,
895cache_release(struct inode *inode, struct file *filp) 874 struct cache_detail *cd)
896{ 875{
897 struct cache_reader *rp = filp->private_data; 876 struct cache_reader *rp = filp->private_data;
898 struct cache_detail *cd = PDE(inode)->data;
899 877
900 if (rp) { 878 if (rp) {
901 spin_lock(&queue_lock); 879 spin_lock(&queue_lock);
@@ -919,23 +897,12 @@ cache_release(struct inode *inode, struct file *filp)
919 cd->last_close = get_seconds(); 897 cd->last_close = get_seconds();
920 atomic_dec(&cd->readers); 898 atomic_dec(&cd->readers);
921 } 899 }
900 module_put(cd->owner);
922 return 0; 901 return 0;
923} 902}
924 903
925 904
926 905
927static const struct file_operations cache_file_operations = {
928 .owner = THIS_MODULE,
929 .llseek = no_llseek,
930 .read = cache_read,
931 .write = cache_write,
932 .poll = cache_poll,
933 .ioctl = cache_ioctl, /* for FIONREAD */
934 .open = cache_open,
935 .release = cache_release,
936};
937
938
939static void cache_dequeue(struct cache_detail *detail, struct cache_head *ch) 906static void cache_dequeue(struct cache_detail *detail, struct cache_head *ch)
940{ 907{
941 struct cache_queue *cq; 908 struct cache_queue *cq;
@@ -1036,15 +1003,21 @@ static void warn_no_listener(struct cache_detail *detail)
1036 if (detail->last_warn != detail->last_close) { 1003 if (detail->last_warn != detail->last_close) {
1037 detail->last_warn = detail->last_close; 1004 detail->last_warn = detail->last_close;
1038 if (detail->warn_no_listener) 1005 if (detail->warn_no_listener)
1039 detail->warn_no_listener(detail); 1006 detail->warn_no_listener(detail, detail->last_close != 0);
1040 } 1007 }
1041} 1008}
1042 1009
1043/* 1010/*
1044 * register an upcall request to user-space. 1011 * register an upcall request to user-space and queue it up for read() by the
1012 * upcall daemon.
1013 *
1045 * Each request is at most one page long. 1014 * Each request is at most one page long.
1046 */ 1015 */
1047static int cache_make_upcall(struct cache_detail *detail, struct cache_head *h) 1016int sunrpc_cache_pipe_upcall(struct cache_detail *detail, struct cache_head *h,
1017 void (*cache_request)(struct cache_detail *,
1018 struct cache_head *,
1019 char **,
1020 int *))
1048{ 1021{
1049 1022
1050 char *buf; 1023 char *buf;
@@ -1052,9 +1025,6 @@ static int cache_make_upcall(struct cache_detail *detail, struct cache_head *h)
1052 char *bp; 1025 char *bp;
1053 int len; 1026 int len;
1054 1027
1055 if (detail->cache_request == NULL)
1056 return -EINVAL;
1057
1058 if (atomic_read(&detail->readers) == 0 && 1028 if (atomic_read(&detail->readers) == 0 &&
1059 detail->last_close < get_seconds() - 30) { 1029 detail->last_close < get_seconds() - 30) {
1060 warn_no_listener(detail); 1030 warn_no_listener(detail);
@@ -1073,7 +1043,7 @@ static int cache_make_upcall(struct cache_detail *detail, struct cache_head *h)
1073 1043
1074 bp = buf; len = PAGE_SIZE; 1044 bp = buf; len = PAGE_SIZE;
1075 1045
1076 detail->cache_request(detail, h, &bp, &len); 1046 cache_request(detail, h, &bp, &len);
1077 1047
1078 if (len < 0) { 1048 if (len < 0) {
1079 kfree(buf); 1049 kfree(buf);
@@ -1091,6 +1061,7 @@ static int cache_make_upcall(struct cache_detail *detail, struct cache_head *h)
1091 wake_up(&queue_wait); 1061 wake_up(&queue_wait);
1092 return 0; 1062 return 0;
1093} 1063}
1064EXPORT_SYMBOL_GPL(sunrpc_cache_pipe_upcall);
1094 1065
1095/* 1066/*
1096 * parse a message from user-space and pass it 1067 * parse a message from user-space and pass it
@@ -1258,11 +1229,13 @@ static const struct seq_operations cache_content_op = {
1258 .show = c_show, 1229 .show = c_show,
1259}; 1230};
1260 1231
1261static int content_open(struct inode *inode, struct file *file) 1232static int content_open(struct inode *inode, struct file *file,
1233 struct cache_detail *cd)
1262{ 1234{
1263 struct handle *han; 1235 struct handle *han;
1264 struct cache_detail *cd = PDE(inode)->data;
1265 1236
1237 if (!cd || !try_module_get(cd->owner))
1238 return -EACCES;
1266 han = __seq_open_private(file, &cache_content_op, sizeof(*han)); 1239 han = __seq_open_private(file, &cache_content_op, sizeof(*han));
1267 if (han == NULL) 1240 if (han == NULL)
1268 return -ENOMEM; 1241 return -ENOMEM;
@@ -1271,17 +1244,33 @@ static int content_open(struct inode *inode, struct file *file)
1271 return 0; 1244 return 0;
1272} 1245}
1273 1246
1274static const struct file_operations content_file_operations = { 1247static int content_release(struct inode *inode, struct file *file,
1275 .open = content_open, 1248 struct cache_detail *cd)
1276 .read = seq_read, 1249{
1277 .llseek = seq_lseek, 1250 int ret = seq_release_private(inode, file);
1278 .release = seq_release_private, 1251 module_put(cd->owner);
1279}; 1252 return ret;
1253}
1254
1255static int open_flush(struct inode *inode, struct file *file,
1256 struct cache_detail *cd)
1257{
1258 if (!cd || !try_module_get(cd->owner))
1259 return -EACCES;
1260 return nonseekable_open(inode, file);
1261}
1262
1263static int release_flush(struct inode *inode, struct file *file,
1264 struct cache_detail *cd)
1265{
1266 module_put(cd->owner);
1267 return 0;
1268}
1280 1269
1281static ssize_t read_flush(struct file *file, char __user *buf, 1270static ssize_t read_flush(struct file *file, char __user *buf,
1282 size_t count, loff_t *ppos) 1271 size_t count, loff_t *ppos,
1272 struct cache_detail *cd)
1283{ 1273{
1284 struct cache_detail *cd = PDE(file->f_path.dentry->d_inode)->data;
1285 char tbuf[20]; 1274 char tbuf[20];
1286 unsigned long p = *ppos; 1275 unsigned long p = *ppos;
1287 size_t len; 1276 size_t len;
@@ -1299,10 +1288,10 @@ static ssize_t read_flush(struct file *file, char __user *buf,
1299 return len; 1288 return len;
1300} 1289}
1301 1290
1302static ssize_t write_flush(struct file * file, const char __user * buf, 1291static ssize_t write_flush(struct file *file, const char __user *buf,
1303 size_t count, loff_t *ppos) 1292 size_t count, loff_t *ppos,
1293 struct cache_detail *cd)
1304{ 1294{
1305 struct cache_detail *cd = PDE(file->f_path.dentry->d_inode)->data;
1306 char tbuf[20]; 1295 char tbuf[20];
1307 char *ep; 1296 char *ep;
1308 long flushtime; 1297 long flushtime;
@@ -1323,8 +1312,343 @@ static ssize_t write_flush(struct file * file, const char __user * buf,
1323 return count; 1312 return count;
1324} 1313}
1325 1314
1326static const struct file_operations cache_flush_operations = { 1315static ssize_t cache_read_procfs(struct file *filp, char __user *buf,
1327 .open = nonseekable_open, 1316 size_t count, loff_t *ppos)
1328 .read = read_flush, 1317{
1329 .write = write_flush, 1318 struct cache_detail *cd = PDE(filp->f_path.dentry->d_inode)->data;
1319
1320 return cache_read(filp, buf, count, ppos, cd);
1321}
1322
1323static ssize_t cache_write_procfs(struct file *filp, const char __user *buf,
1324 size_t count, loff_t *ppos)
1325{
1326 struct cache_detail *cd = PDE(filp->f_path.dentry->d_inode)->data;
1327
1328 return cache_write(filp, buf, count, ppos, cd);
1329}
1330
1331static unsigned int cache_poll_procfs(struct file *filp, poll_table *wait)
1332{
1333 struct cache_detail *cd = PDE(filp->f_path.dentry->d_inode)->data;
1334
1335 return cache_poll(filp, wait, cd);
1336}
1337
1338static int cache_ioctl_procfs(struct inode *inode, struct file *filp,
1339 unsigned int cmd, unsigned long arg)
1340{
1341 struct cache_detail *cd = PDE(inode)->data;
1342
1343 return cache_ioctl(inode, filp, cmd, arg, cd);
1344}
1345
1346static int cache_open_procfs(struct inode *inode, struct file *filp)
1347{
1348 struct cache_detail *cd = PDE(inode)->data;
1349
1350 return cache_open(inode, filp, cd);
1351}
1352
1353static int cache_release_procfs(struct inode *inode, struct file *filp)
1354{
1355 struct cache_detail *cd = PDE(inode)->data;
1356
1357 return cache_release(inode, filp, cd);
1358}
1359
1360static const struct file_operations cache_file_operations_procfs = {
1361 .owner = THIS_MODULE,
1362 .llseek = no_llseek,
1363 .read = cache_read_procfs,
1364 .write = cache_write_procfs,
1365 .poll = cache_poll_procfs,
1366 .ioctl = cache_ioctl_procfs, /* for FIONREAD */
1367 .open = cache_open_procfs,
1368 .release = cache_release_procfs,
1330}; 1369};
1370
1371static int content_open_procfs(struct inode *inode, struct file *filp)
1372{
1373 struct cache_detail *cd = PDE(inode)->data;
1374
1375 return content_open(inode, filp, cd);
1376}
1377
1378static int content_release_procfs(struct inode *inode, struct file *filp)
1379{
1380 struct cache_detail *cd = PDE(inode)->data;
1381
1382 return content_release(inode, filp, cd);
1383}
1384
1385static const struct file_operations content_file_operations_procfs = {
1386 .open = content_open_procfs,
1387 .read = seq_read,
1388 .llseek = seq_lseek,
1389 .release = content_release_procfs,
1390};
1391
1392static int open_flush_procfs(struct inode *inode, struct file *filp)
1393{
1394 struct cache_detail *cd = PDE(inode)->data;
1395
1396 return open_flush(inode, filp, cd);
1397}
1398
1399static int release_flush_procfs(struct inode *inode, struct file *filp)
1400{
1401 struct cache_detail *cd = PDE(inode)->data;
1402
1403 return release_flush(inode, filp, cd);
1404}
1405
1406static ssize_t read_flush_procfs(struct file *filp, char __user *buf,
1407 size_t count, loff_t *ppos)
1408{
1409 struct cache_detail *cd = PDE(filp->f_path.dentry->d_inode)->data;
1410
1411 return read_flush(filp, buf, count, ppos, cd);
1412}
1413
1414static ssize_t write_flush_procfs(struct file *filp,
1415 const char __user *buf,
1416 size_t count, loff_t *ppos)
1417{
1418 struct cache_detail *cd = PDE(filp->f_path.dentry->d_inode)->data;
1419
1420 return write_flush(filp, buf, count, ppos, cd);
1421}
1422
1423static const struct file_operations cache_flush_operations_procfs = {
1424 .open = open_flush_procfs,
1425 .read = read_flush_procfs,
1426 .write = write_flush_procfs,
1427 .release = release_flush_procfs,
1428};
1429
1430static void remove_cache_proc_entries(struct cache_detail *cd)
1431{
1432 if (cd->u.procfs.proc_ent == NULL)
1433 return;
1434 if (cd->u.procfs.flush_ent)
1435 remove_proc_entry("flush", cd->u.procfs.proc_ent);
1436 if (cd->u.procfs.channel_ent)
1437 remove_proc_entry("channel", cd->u.procfs.proc_ent);
1438 if (cd->u.procfs.content_ent)
1439 remove_proc_entry("content", cd->u.procfs.proc_ent);
1440 cd->u.procfs.proc_ent = NULL;
1441 remove_proc_entry(cd->name, proc_net_rpc);
1442}
1443
1444#ifdef CONFIG_PROC_FS
1445static int create_cache_proc_entries(struct cache_detail *cd)
1446{
1447 struct proc_dir_entry *p;
1448
1449 cd->u.procfs.proc_ent = proc_mkdir(cd->name, proc_net_rpc);
1450 if (cd->u.procfs.proc_ent == NULL)
1451 goto out_nomem;
1452 cd->u.procfs.channel_ent = NULL;
1453 cd->u.procfs.content_ent = NULL;
1454
1455 p = proc_create_data("flush", S_IFREG|S_IRUSR|S_IWUSR,
1456 cd->u.procfs.proc_ent,
1457 &cache_flush_operations_procfs, cd);
1458 cd->u.procfs.flush_ent = p;
1459 if (p == NULL)
1460 goto out_nomem;
1461
1462 if (cd->cache_upcall || cd->cache_parse) {
1463 p = proc_create_data("channel", S_IFREG|S_IRUSR|S_IWUSR,
1464 cd->u.procfs.proc_ent,
1465 &cache_file_operations_procfs, cd);
1466 cd->u.procfs.channel_ent = p;
1467 if (p == NULL)
1468 goto out_nomem;
1469 }
1470 if (cd->cache_show) {
1471 p = proc_create_data("content", S_IFREG|S_IRUSR|S_IWUSR,
1472 cd->u.procfs.proc_ent,
1473 &content_file_operations_procfs, cd);
1474 cd->u.procfs.content_ent = p;
1475 if (p == NULL)
1476 goto out_nomem;
1477 }
1478 return 0;
1479out_nomem:
1480 remove_cache_proc_entries(cd);
1481 return -ENOMEM;
1482}
1483#else /* CONFIG_PROC_FS */
1484static int create_cache_proc_entries(struct cache_detail *cd)
1485{
1486 return 0;
1487}
1488#endif
1489
1490int cache_register(struct cache_detail *cd)
1491{
1492 int ret;
1493
1494 sunrpc_init_cache_detail(cd);
1495 ret = create_cache_proc_entries(cd);
1496 if (ret)
1497 sunrpc_destroy_cache_detail(cd);
1498 return ret;
1499}
1500EXPORT_SYMBOL_GPL(cache_register);
1501
1502void cache_unregister(struct cache_detail *cd)
1503{
1504 remove_cache_proc_entries(cd);
1505 sunrpc_destroy_cache_detail(cd);
1506}
1507EXPORT_SYMBOL_GPL(cache_unregister);
1508
1509static ssize_t cache_read_pipefs(struct file *filp, char __user *buf,
1510 size_t count, loff_t *ppos)
1511{
1512 struct cache_detail *cd = RPC_I(filp->f_path.dentry->d_inode)->private;
1513
1514 return cache_read(filp, buf, count, ppos, cd);
1515}
1516
1517static ssize_t cache_write_pipefs(struct file *filp, const char __user *buf,
1518 size_t count, loff_t *ppos)
1519{
1520 struct cache_detail *cd = RPC_I(filp->f_path.dentry->d_inode)->private;
1521
1522 return cache_write(filp, buf, count, ppos, cd);
1523}
1524
1525static unsigned int cache_poll_pipefs(struct file *filp, poll_table *wait)
1526{
1527 struct cache_detail *cd = RPC_I(filp->f_path.dentry->d_inode)->private;
1528
1529 return cache_poll(filp, wait, cd);
1530}
1531
1532static int cache_ioctl_pipefs(struct inode *inode, struct file *filp,
1533 unsigned int cmd, unsigned long arg)
1534{
1535 struct cache_detail *cd = RPC_I(inode)->private;
1536
1537 return cache_ioctl(inode, filp, cmd, arg, cd);
1538}
1539
1540static int cache_open_pipefs(struct inode *inode, struct file *filp)
1541{
1542 struct cache_detail *cd = RPC_I(inode)->private;
1543
1544 return cache_open(inode, filp, cd);
1545}
1546
1547static int cache_release_pipefs(struct inode *inode, struct file *filp)
1548{
1549 struct cache_detail *cd = RPC_I(inode)->private;
1550
1551 return cache_release(inode, filp, cd);
1552}
1553
1554const struct file_operations cache_file_operations_pipefs = {
1555 .owner = THIS_MODULE,
1556 .llseek = no_llseek,
1557 .read = cache_read_pipefs,
1558 .write = cache_write_pipefs,
1559 .poll = cache_poll_pipefs,
1560 .ioctl = cache_ioctl_pipefs, /* for FIONREAD */
1561 .open = cache_open_pipefs,
1562 .release = cache_release_pipefs,
1563};
1564
1565static int content_open_pipefs(struct inode *inode, struct file *filp)
1566{
1567 struct cache_detail *cd = RPC_I(inode)->private;
1568
1569 return content_open(inode, filp, cd);
1570}
1571
1572static int content_release_pipefs(struct inode *inode, struct file *filp)
1573{
1574 struct cache_detail *cd = RPC_I(inode)->private;
1575
1576 return content_release(inode, filp, cd);
1577}
1578
1579const struct file_operations content_file_operations_pipefs = {
1580 .open = content_open_pipefs,
1581 .read = seq_read,
1582 .llseek = seq_lseek,
1583 .release = content_release_pipefs,
1584};
1585
1586static int open_flush_pipefs(struct inode *inode, struct file *filp)
1587{
1588 struct cache_detail *cd = RPC_I(inode)->private;
1589
1590 return open_flush(inode, filp, cd);
1591}
1592
1593static int release_flush_pipefs(struct inode *inode, struct file *filp)
1594{
1595 struct cache_detail *cd = RPC_I(inode)->private;
1596
1597 return release_flush(inode, filp, cd);
1598}
1599
1600static ssize_t read_flush_pipefs(struct file *filp, char __user *buf,
1601 size_t count, loff_t *ppos)
1602{
1603 struct cache_detail *cd = RPC_I(filp->f_path.dentry->d_inode)->private;
1604
1605 return read_flush(filp, buf, count, ppos, cd);
1606}
1607
1608static ssize_t write_flush_pipefs(struct file *filp,
1609 const char __user *buf,
1610 size_t count, loff_t *ppos)
1611{
1612 struct cache_detail *cd = RPC_I(filp->f_path.dentry->d_inode)->private;
1613
1614 return write_flush(filp, buf, count, ppos, cd);
1615}
1616
1617const struct file_operations cache_flush_operations_pipefs = {
1618 .open = open_flush_pipefs,
1619 .read = read_flush_pipefs,
1620 .write = write_flush_pipefs,
1621 .release = release_flush_pipefs,
1622};
1623
1624int sunrpc_cache_register_pipefs(struct dentry *parent,
1625 const char *name, mode_t umode,
1626 struct cache_detail *cd)
1627{
1628 struct qstr q;
1629 struct dentry *dir;
1630 int ret = 0;
1631
1632 sunrpc_init_cache_detail(cd);
1633 q.name = name;
1634 q.len = strlen(name);
1635 q.hash = full_name_hash(q.name, q.len);
1636 dir = rpc_create_cache_dir(parent, &q, umode, cd);
1637 if (!IS_ERR(dir))
1638 cd->u.pipefs.dir = dir;
1639 else {
1640 sunrpc_destroy_cache_detail(cd);
1641 ret = PTR_ERR(dir);
1642 }
1643 return ret;
1644}
1645EXPORT_SYMBOL_GPL(sunrpc_cache_register_pipefs);
1646
1647void sunrpc_cache_unregister_pipefs(struct cache_detail *cd)
1648{
1649 rpc_remove_cache_dir(cd->u.pipefs.dir);
1650 cd->u.pipefs.dir = NULL;
1651 sunrpc_destroy_cache_detail(cd);
1652}
1653EXPORT_SYMBOL_GPL(sunrpc_cache_unregister_pipefs);
1654
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-11 17:58:17 -0500