| Message ID | 20180530194807.31657-14-longli@linuxonhyperv.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi Long,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on v4.17-rc6]
[cannot apply to cifs/for-next next-20180601]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Long-Li/CIFS-Add-direct-I-O-support/20180602-130240
config: i386-randconfig-x000-201821 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-16) 7.3.0
reproduce:
# save the attached .config to linux build tree
make ARCH=i386
All warnings (new ones prefixed by >>):
In file included from include/linux/kernel.h:14:0,
from include/linux/list.h:9,
from include/linux/wait.h:7,
from include/linux/wait_bit.h:8,
from include/linux/fs.h:6,
from fs/cifs/file.c:24:
fs/cifs/file.c: In function 'cifs_direct_readv':
include/linux/kern_levels.h:5:18: warning: format '%lu' expects argument of type 'long unsigned int', but argument 4 has type 'size_t {aka unsigned int}' [-Wformat=]
#define KERN_SOH "\001" /* ASCII Start Of Header */
^
include/linux/printk.h:136:10: note: in definition of macro 'no_printk'
printk(fmt, ##__VA_ARGS__); \
^~~
include/linux/kern_levels.h:15:20: note: in expansion of macro 'KERN_SOH'
#define KERN_DEBUG KERN_SOH "7" /* debug-level messages */
^~~~~~~~
include/linux/printk.h:342:12: note: in expansion of macro 'KERN_DEBUG'
no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
^~~~~~~~~~
>> fs/cifs/cifs_debug.h:82:3: note: in expansion of macro 'pr_debug'
pr_debug(fmt, ##__VA_ARGS__); \
^~~~~~~~
fs/cifs/file.c:3346:4: note: in expansion of macro 'cifs_dbg'
cifs_dbg(VFS,
^~~~~~~~
fs/cifs/file.c:3348:20: note: format string is defined here
" iov_offset %lu count %lu\n",
~~^
%u
In file included from include/linux/kernel.h:14:0,
from include/linux/list.h:9,
from include/linux/wait.h:7,
from include/linux/wait_bit.h:8,
from include/linux/fs.h:6,
from fs/cifs/file.c:24:
include/linux/kern_levels.h:5:18: warning: format '%lu' expects argument of type 'long unsigned int', but argument 5 has type 'size_t {aka unsigned int}' [-Wformat=]
#define KERN_SOH "\001" /* ASCII Start Of Header */
^
include/linux/printk.h:136:10: note: in definition of macro 'no_printk'
printk(fmt, ##__VA_ARGS__); \
^~~
include/linux/kern_levels.h:15:20: note: in expansion of macro 'KERN_SOH'
#define KERN_DEBUG KERN_SOH "7" /* debug-level messages */
^~~~~~~~
include/linux/printk.h:342:12: note: in expansion of macro 'KERN_DEBUG'
no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
^~~~~~~~~~
>> fs/cifs/cifs_debug.h:82:3: note: in expansion of macro 'pr_debug'
pr_debug(fmt, ##__VA_ARGS__); \
^~~~~~~~
fs/cifs/file.c:3346:4: note: in expansion of macro 'cifs_dbg'
cifs_dbg(VFS,
^~~~~~~~
fs/cifs/file.c:3348:30: note: format string is defined here
" iov_offset %lu count %lu\n",
~~^
%u
vim +/pr_debug +82 fs/cifs/cifs_debug.h
f2f176b4 Aurelien Aptel 2018-04-10 73
^1da177e Linus Torvalds 2005-04-16 74 /*
^1da177e Linus Torvalds 2005-04-16 75 * debug OFF
^1da177e Linus Torvalds 2005-04-16 76 * ---------
^1da177e Linus Torvalds 2005-04-16 77 */
^1da177e Linus Torvalds 2005-04-16 78 #else /* _CIFS_DEBUG */
f96637be Joe Perches 2013-05-04 79 #define cifs_dbg(type, fmt, ...) \
bde98197 Joe Perches 2012-12-05 80 do { \
bde98197 Joe Perches 2012-12-05 81 if (0) \
0b456f04 Andy Shevchenko 2014-08-27 @82 pr_debug(fmt, ##__VA_ARGS__); \
bde98197 Joe Perches 2012-12-05 83 } while (0)
f96637be Joe Perches 2013-05-04 84 #endif
^1da177e Linus Torvalds 2005-04-16 85
:::::: The code at line 82 was first introduced by commit
:::::: 0b456f04bcdf5b1151136adaada158bfc26f1be7 cifs: convert printk(LEVEL...) to pr_<level>
:::::: TO: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
:::::: CC: Steve French <steve.french@primarydata.com>
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
Hi Long,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on v4.17-rc6]
[cannot apply to cifs/for-next next-20180601]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Long-Li/CIFS-Add-direct-I-O-support/20180602-130240
config: i386-randconfig-x008-201821 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-16) 7.3.0
reproduce:
# save the attached .config to linux build tree
make ARCH=i386
All warnings (new ones prefixed by >>):
In file included from include/linux/kernel.h:14:0,
from include/linux/list.h:9,
from include/linux/wait.h:7,
from include/linux/wait_bit.h:8,
from include/linux/fs.h:6,
from fs//cifs/file.c:24:
fs//cifs/file.c: In function 'cifs_direct_readv':
include/linux/kern_levels.h:5:18: warning: format '%lu' expects argument of type 'long unsigned int', but argument 5 has type 'size_t {aka unsigned int}' [-Wformat=]
#define KERN_SOH "\001" /* ASCII Start Of Header */
^
include/linux/printk.h:136:10: note: in definition of macro 'no_printk'
printk(fmt, ##__VA_ARGS__); \
^~~
include/linux/kern_levels.h:15:20: note: in expansion of macro 'KERN_SOH'
#define KERN_DEBUG KERN_SOH "7" /* debug-level messages */
^~~~~~~~
include/linux/printk.h:410:12: note: in expansion of macro 'KERN_DEBUG'
no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
^~~~~~~~~~
fs//cifs/cifs_debug.h:54:3: note: in expansion of macro 'pr_debug_once'
pr_debug_ ## ratefunc("%s: " \
^~~~~~~~~
fs//cifs/cifs_debug.h:67:3: note: in expansion of macro 'cifs_dbg_func'
cifs_dbg_func(once, \
^~~~~~~~~~~~~
>> fs//cifs/file.c:3346:4: note: in expansion of macro 'cifs_dbg'
cifs_dbg(VFS,
^~~~~~~~
fs//cifs/file.c:3348:20: note: format string is defined here
" iov_offset %lu count %lu\n",
~~^
%u
In file included from include/linux/kernel.h:14:0,
from include/linux/list.h:9,
from include/linux/wait.h:7,
from include/linux/wait_bit.h:8,
from include/linux/fs.h:6,
from fs//cifs/file.c:24:
include/linux/kern_levels.h:5:18: warning: format '%lu' expects argument of type 'long unsigned int', but argument 6 has type 'size_t {aka unsigned int}' [-Wformat=]
#define KERN_SOH "\001" /* ASCII Start Of Header */
^
include/linux/printk.h:136:10: note: in definition of macro 'no_printk'
printk(fmt, ##__VA_ARGS__); \
^~~
include/linux/kern_levels.h:15:20: note: in expansion of macro 'KERN_SOH'
#define KERN_DEBUG KERN_SOH "7" /* debug-level messages */
^~~~~~~~
include/linux/printk.h:410:12: note: in expansion of macro 'KERN_DEBUG'
no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
^~~~~~~~~~
fs//cifs/cifs_debug.h:54:3: note: in expansion of macro 'pr_debug_once'
pr_debug_ ## ratefunc("%s: " \
^~~~~~~~~
fs//cifs/cifs_debug.h:67:3: note: in expansion of macro 'cifs_dbg_func'
cifs_dbg_func(once, \
^~~~~~~~~~~~~
>> fs//cifs/file.c:3346:4: note: in expansion of macro 'cifs_dbg'
cifs_dbg(VFS,
^~~~~~~~
fs//cifs/file.c:3348:30: note: format string is defined here
" iov_offset %lu count %lu\n",
~~^
%u
In file included from include/linux/kernel.h:14:0,
from include/linux/list.h:9,
from include/linux/wait.h:7,
from include/linux/wait_bit.h:8,
from include/linux/fs.h:6,
from fs//cifs/file.c:24:
include/linux/kern_levels.h:5:18: warning: format '%lu' expects argument of type 'long unsigned int', but argument 4 has type 'size_t {aka unsigned int}' [-Wformat=]
#define KERN_SOH "\001" /* ASCII Start Of Header */
^
include/linux/printk.h:357:10: note: in definition of macro 'printk_once'
printk(fmt, ##__VA_ARGS__); \
^~~
include/linux/kern_levels.h:11:18: note: in expansion of macro 'KERN_SOH'
#define KERN_ERR KERN_SOH "3" /* error conditions */
^~~~~~~~
include/linux/printk.h:386:14: note: in expansion of macro 'KERN_ERR'
printk_once(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
^~~~~~~~
fs//cifs/cifs_debug.h:57:3: note: in expansion of macro 'pr_err_once'
pr_err_ ## ratefunc("CIFS VFS: " \
^~~~~~~
fs//cifs/cifs_debug.h:67:3: note: in expansion of macro 'cifs_dbg_func'
cifs_dbg_func(once, \
^~~~~~~~~~~~~
>> fs//cifs/file.c:3346:4: note: in expansion of macro 'cifs_dbg'
cifs_dbg(VFS,
^~~~~~~~
fs//cifs/file.c:3348:20: note: format string is defined here
" iov_offset %lu count %lu\n",
~~^
%u
In file included from include/linux/kernel.h:14:0,
from include/linux/list.h:9,
from include/linux/wait.h:7,
from include/linux/wait_bit.h:8,
from include/linux/fs.h:6,
from fs//cifs/file.c:24:
include/linux/kern_levels.h:5:18: warning: format '%lu' expects argument of type 'long unsigned int', but argument 5 has type 'size_t {aka unsigned int}' [-Wformat=]
#define KERN_SOH "\001" /* ASCII Start Of Header */
^
include/linux/printk.h:357:10: note: in definition of macro 'printk_once'
printk(fmt, ##__VA_ARGS__); \
^~~
include/linux/kern_levels.h:11:18: note: in expansion of macro 'KERN_SOH'
#define KERN_ERR KERN_SOH "3" /* error conditions */
^~~~~~~~
include/linux/printk.h:386:14: note: in expansion of macro 'KERN_ERR'
printk_once(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
^~~~~~~~
fs//cifs/cifs_debug.h:57:3: note: in expansion of macro 'pr_err_once'
pr_err_ ## ratefunc("CIFS VFS: " \
^~~~~~~
fs//cifs/cifs_debug.h:67:3: note: in expansion of macro 'cifs_dbg_func'
cifs_dbg_func(once, \
^~~~~~~~~~~~~
>> fs//cifs/file.c:3346:4: note: in expansion of macro 'cifs_dbg'
cifs_dbg(VFS,
^~~~~~~~
fs//cifs/file.c:3348:30: note: format string is defined here
" iov_offset %lu count %lu\n",
~~^
%u
In file included from include/linux/kernel.h:14:0,
from include/linux/list.h:9,
from include/linux/wait.h:7,
from include/linux/wait_bit.h:8,
from include/linux/fs.h:6,
from fs//cifs/file.c:24:
include/linux/kern_levels.h:5:18: warning: format '%lu' expects argument of type 'long unsigned int', but argument 4 has type 'size_t {aka unsigned int}' [-Wformat=]
#define KERN_SOH "\001" /* ASCII Start Of Header */
^
include/linux/printk.h:136:10: note: in definition of macro 'no_printk'
printk(fmt, ##__VA_ARGS__); \
^~~
include/linux/kern_levels.h:15:20: note: in expansion of macro 'KERN_SOH'
#define KERN_DEBUG KERN_SOH "7" /* debug-level messages */
^~~~~~~~
include/linux/printk.h:410:12: note: in expansion of macro 'KERN_DEBUG'
no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
^~~~~~~~~~
fs//cifs/cifs_debug.h:60:3: note: in expansion of macro 'pr_debug_once'
pr_debug_ ## ratefunc(fmt, ##__VA_ARGS__); \
^~~~~~~~~
fs//cifs/cifs_debug.h:67:3: note: in expansion of macro 'cifs_dbg_func'
cifs_dbg_func(once, \
^~~~~~~~~~~~~
>> fs//cifs/file.c:3346:4: note: in expansion of macro 'cifs_dbg'
cifs_dbg(VFS,
^~~~~~~~
fs//cifs/file.c:3348:20: note: format string is defined here
" iov_offset %lu count %lu\n",
~~^
%u
In file included from include/linux/kernel.h:14:0,
from include/linux/list.h:9,
from include/linux/wait.h:7,
from include/linux/wait_bit.h:8,
from include/linux/fs.h:6,
from fs//cifs/file.c:24:
include/linux/kern_levels.h:5:18: warning: format '%lu' expects argument of type 'long unsigned int', but argument 5 has type 'size_t {aka unsigned int}' [-Wformat=]
#define KERN_SOH "\001" /* ASCII Start Of Header */
^
include/linux/printk.h:136:10: note: in definition of macro 'no_printk'
printk(fmt, ##__VA_ARGS__); \
^~~
include/linux/kern_levels.h:15:20: note: in expansion of macro 'KERN_SOH'
#define KERN_DEBUG KERN_SOH "7" /* debug-level messages */
^~~~~~~~
include/linux/printk.h:410:12: note: in expansion of macro 'KERN_DEBUG'
no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
^~~~~~~~~~
fs//cifs/cifs_debug.h:60:3: note: in expansion of macro 'pr_debug_once'
pr_debug_ ## ratefunc(fmt, ##__VA_ARGS__); \
^~~~~~~~~
fs//cifs/cifs_debug.h:67:3: note: in expansion of macro 'cifs_dbg_func'
cifs_dbg_func(once, \
^~~~~~~~~~~~~
>> fs//cifs/file.c:3346:4: note: in expansion of macro 'cifs_dbg'
cifs_dbg(VFS,
^~~~~~~~
fs//cifs/file.c:3348:30: note: format string is defined here
" iov_offset %lu count %lu\n",
~~^
%u
In file included from include/linux/kernel.h:14:0,
from include/linux/list.h:9,
from include/linux/wait.h:7,
from include/linux/wait_bit.h:8,
from include/linux/fs.h:6,
from fs//cifs/file.c:24:
include/linux/kern_levels.h:5:18: warning: format '%lu' expects argument of type 'long unsigned int', but argument 5 has type 'size_t {aka unsigned int}' [-Wformat=]
#define KERN_SOH "\001" /* ASCII Start Of Header */
^
include/linux/printk.h:136:10: note: in definition of macro 'no_printk'
printk(fmt, ##__VA_ARGS__); \
^~~
include/linux/kern_levels.h:15:20: note: in expansion of macro 'KERN_SOH'
#define KERN_DEBUG KERN_SOH "7" /* debug-level messages */
^~~~~~~~
include/linux/printk.h:474:12: note: in expansion of macro 'KERN_DEBUG'
no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
^~~~~~~~~~
fs//cifs/cifs_debug.h:54:3: note: in expansion of macro 'pr_debug_ratelimited'
pr_debug_ ## ratefunc("%s: " \
^~~~~~~~~
fs//cifs/cifs_debug.h:70:3: note: in expansion of macro 'cifs_dbg_func'
cifs_dbg_func(ratelimited, \
^~~~~~~~~~~~~
>> fs//cifs/file.c:3346:4: note: in expansion of macro 'cifs_dbg'
cifs_dbg(VFS,
^~~~~~~~
fs//cifs/file.c:3348:20: note: format string is defined here
" iov_offset %lu count %lu\n",
~~^
%u
In file included from include/linux/kernel.h:14:0,
from include/linux/list.h:9,
from include/linux/wait.h:7,
from include/linux/wait_bit.h:8,
from include/linux/fs.h:6,
from fs//cifs/file.c:24:
include/linux/kern_levels.h:5:18: warning: format '%lu' expects argument of type 'long unsigned int', but argument 6 has type 'size_t {aka unsigned int}' [-Wformat=]
#define KERN_SOH "\001" /* ASCII Start Of Header */
^
include/linux/printk.h:136:10: note: in definition of macro 'no_printk'
printk(fmt, ##__VA_ARGS__); \
^~~
include/linux/kern_levels.h:15:20: note: in expansion of macro 'KERN_SOH'
#define KERN_DEBUG KERN_SOH "7" /* debug-level messages */
^~~~~~~~
include/linux/printk.h:474:12: note: in expansion of macro 'KERN_DEBUG'
no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
^~~~~~~~~~
fs//cifs/cifs_debug.h:54:3: note: in expansion of macro 'pr_debug_ratelimited'
pr_debug_ ## ratefunc("%s: " \
^~~~~~~~~
fs//cifs/cifs_debug.h:70:3: note: in expansion of macro 'cifs_dbg_func'
cifs_dbg_func(ratelimited, \
^~~~~~~~~~~~~
>> fs//cifs/file.c:3346:4: note: in expansion of macro 'cifs_dbg'
cifs_dbg(VFS,
^~~~~~~~
fs//cifs/file.c:3348:30: note: format string is defined here
" iov_offset %lu count %lu\n",
~~^
%u
In file included from include/linux/kernel.h:14:0,
from include/linux/list.h:9,
from include/linux/wait.h:7,
from include/linux/wait_bit.h:8,
from include/linux/fs.h:6,
from fs//cifs/file.c:24:
include/linux/kern_levels.h:5:18: warning: format '%lu' expects argument of type 'long unsigned int', but argument 4 has type 'size_t {aka unsigned int}' [-Wformat=]
#define KERN_SOH "\001" /* ASCII Start Of Header */
^
include/linux/printk.h:425:10: note: in definition of macro 'printk_ratelimited'
printk(fmt, ##__VA_ARGS__); \
^~~
include/linux/kern_levels.h:11:18: note: in expansion of macro 'KERN_SOH'
#define KERN_ERR KERN_SOH "3" /* error conditions */
^~~~~~~~
include/linux/printk.h:439:21: note: in expansion of macro 'KERN_ERR'
printk_ratelimited(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
^~~~~~~~
fs//cifs/cifs_debug.h:57:3: note: in expansion of macro 'pr_err_ratelimited'
pr_err_ ## ratefunc("CIFS VFS: " \
^~~~~~~
fs//cifs/cifs_debug.h:70:3: note: in expansion of macro 'cifs_dbg_func'
cifs_dbg_func(ratelimited, \
^~~~~~~~~~~~~
>> fs//cifs/file.c:3346:4: note: in expansion of macro 'cifs_dbg'
cifs_dbg(VFS,
^~~~~~~~
fs//cifs/file.c:3348:20: note: format string is defined here
" iov_offset %lu count %lu\n",
~~^
%u
In file included from include/linux/kernel.h:14:0,
from include/linux/list.h:9,
from include/linux/wait.h:7,
from include/linux/wait_bit.h:8,
from include/linux/fs.h:6,
from fs//cifs/file.c:24:
include/linux/kern_levels.h:5:18: warning: format '%lu' expects argument of type 'long unsigned int', but argument 5 has type 'size_t {aka unsigned int}' [-Wformat=]
#define KERN_SOH "\001" /* ASCII Start Of Header */
^
include/linux/printk.h:425:10: note: in definition of macro 'printk_ratelimited'
printk(fmt, ##__VA_ARGS__); \
^~~
include/linux/kern_levels.h:11:18: note: in expansion of macro 'KERN_SOH'
#define KERN_ERR KERN_SOH "3" /* error conditions */
^~~~~~~~
include/linux/printk.h:439:21: note: in expansion of macro 'KERN_ERR'
printk_ratelimited(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
^~~~~~~~
fs//cifs/cifs_debug.h:57:3: note: in expansion of macro 'pr_err_ratelimited'
pr_err_ ## ratefunc("CIFS VFS: " \
^~~~~~~
fs//cifs/cifs_debug.h:70:3: note: in expansion of macro 'cifs_dbg_func'
cifs_dbg_func(ratelimited, \
^~~~~~~~~~~~~
>> fs//cifs/file.c:3346:4: note: in expansion of macro 'cifs_dbg'
cifs_dbg(VFS,
^~~~~~~~
fs//cifs/file.c:3348:30: note: format string is defined here
" iov_offset %lu count %lu\n",
~~^
%u
In file included from include/linux/kernel.h:14:0,
from include/linux/list.h:9,
from include/linux/wait.h:7,
from include/linux/wait_bit.h:8,
from include/linux/fs.h:6,
from fs//cifs/file.c:24:
include/linux/kern_levels.h:5:18: warning: format '%lu' expects argument of type 'long unsigned int', but argument 4 has type 'size_t {aka unsigned int}' [-Wformat=]
#define KERN_SOH "\001" /* ASCII Start Of Header */
^
include/linux/printk.h:136:10: note: in definition of macro 'no_printk'
printk(fmt, ##__VA_ARGS__); \
^~~
include/linux/kern_levels.h:15:20: note: in expansion of macro 'KERN_SOH'
#define KERN_DEBUG KERN_SOH "7" /* debug-level messages */
^~~~~~~~
include/linux/printk.h:474:12: note: in expansion of macro 'KERN_DEBUG'
no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
^~~~~~~~~~
fs//cifs/cifs_debug.h:60:3: note: in expansion of macro 'pr_debug_ratelimited'
pr_debug_ ## ratefunc(fmt, ##__VA_ARGS__); \
^~~~~~~~~
fs//cifs/cifs_debug.h:70:3: note: in expansion of macro 'cifs_dbg_func'
cifs_dbg_func(ratelimited, \
^~~~~~~~~~~~~
>> fs//cifs/file.c:3346:4: note: in expansion of macro 'cifs_dbg'
cifs_dbg(VFS,
^~~~~~~~
fs//cifs/file.c:3348:20: note: format string is defined here
" iov_offset %lu count %lu\n",
~~^
%u
In file included from include/linux/kernel.h:14:0,
from include/linux/list.h:9,
from include/linux/wait.h:7,
from include/linux/wait_bit.h:8,
from include/linux/fs.h:6,
from fs//cifs/file.c:24:
include/linux/kern_levels.h:5:18: warning: format '%lu' expects argument of type 'long unsigned int', but argument 5 has type 'size_t {aka unsigned int}' [-Wformat=]
#define KERN_SOH "\001" /* ASCII Start Of Header */
^
include/linux/printk.h:136:10: note: in definition of macro 'no_printk'
printk(fmt, ##__VA_ARGS__); \
^~~
include/linux/kern_levels.h:15:20: note: in expansion of macro 'KERN_SOH'
#define KERN_DEBUG KERN_SOH "7" /* debug-level messages */
^~~~~~~~
include/linux/printk.h:474:12: note: in expansion of macro 'KERN_DEBUG'
no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
^~~~~~~~~~
fs//cifs/cifs_debug.h:60:3: note: in expansion of macro 'pr_debug_ratelimited'
pr_debug_ ## ratefunc(fmt, ##__VA_ARGS__); \
^~~~~~~~~
fs//cifs/cifs_debug.h:70:3: note: in expansion of macro 'cifs_dbg_func'
cifs_dbg_func(ratelimited, \
^~~~~~~~~~~~~
>> fs//cifs/file.c:3346:4: note: in expansion of macro 'cifs_dbg'
cifs_dbg(VFS,
^~~~~~~~
fs//cifs/file.c:3348:30: note: format string is defined here
" iov_offset %lu count %lu\n",
~~^
%u
vim +/cifs_dbg +3346 fs//cifs/file.c
3290
3291 ssize_t cifs_direct_readv(struct kiocb *iocb, struct iov_iter *to)
3292 {
3293 size_t len, cur_len, start;
3294 unsigned int npages, rsize, credits;
3295 struct file *file;
3296 struct cifs_sb_info *cifs_sb;
3297 struct cifsFileInfo *cfile;
3298 struct cifs_tcon *tcon;
3299 struct page **pagevec;
3300 ssize_t rc, total_read = 0;
3301 struct TCP_Server_Info *server;
3302 loff_t offset = iocb->ki_pos;
3303 pid_t pid;
3304 struct cifs_readdata *rdata;
3305
3306 /*
3307 * iov_iter_get_pages_alloc() doesn't work with ITER_KVEC,
3308 * fall back to data copy read path
3309 */
3310 if (to->type & ITER_KVEC) {
3311 cifs_dbg(FYI, "use non-direct cifs_user_readv for kvec I/O\n");
3312 return cifs_user_readv(iocb, to);
3313 }
3314
3315 len = iov_iter_count(to);
3316 if (!len)
3317 return 0;
3318
3319 file = iocb->ki_filp;
3320 cifs_sb = CIFS_FILE_SB(file);
3321 cfile = file->private_data;
3322 tcon = tlink_tcon(cfile->tlink);
3323 server = tcon->ses->server;
3324
3325 if (!server->ops->async_readv)
3326 return -ENOSYS;
3327
3328 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
3329 pid = cfile->pid;
3330 else
3331 pid = current->tgid;
3332
3333 if ((file->f_flags & O_ACCMODE) == O_WRONLY)
3334 cifs_dbg(FYI, "attempting read on write only file instance\n");
3335
3336 do {
3337 rc = server->ops->wait_mtu_credits(server, cifs_sb->rsize,
3338 &rsize, &credits);
3339 if (rc)
3340 break;
3341
3342 cur_len = min_t(const size_t, len, rsize);
3343
3344 rc = iov_iter_get_pages_alloc(to, &pagevec, cur_len, &start);
3345 if (rc < 0) {
> 3346 cifs_dbg(VFS,
3347 "couldn't get user pages (rc=%zd) iter type %d"
3348 " iov_offset %lu count %lu\n",
3349 rc, to->type, to->iov_offset, to->count);
3350 dump_stack();
3351 break;
3352 }
3353
3354 rdata = cifs_readdata_direct_alloc(
3355 pagevec, cifs_direct_readv_complete);
3356 if (!rdata) {
3357 add_credits_and_wake_if(server, credits, 0);
3358 rc = -ENOMEM;
3359 break;
3360 }
3361
3362 npages = (rc + start + PAGE_SIZE-1) / PAGE_SIZE;
3363 rdata->nr_pages = npages;
3364 rdata->page_offset = start;
3365 rdata->pagesz = PAGE_SIZE;
3366 rdata->tailsz = npages > 1 ?
3367 rc-(PAGE_SIZE-start)-(npages-2)*PAGE_SIZE :
3368 rc;
3369 cur_len = rc;
3370
3371 rdata->cfile = cifsFileInfo_get(cfile);
3372 rdata->offset = offset;
3373 rdata->bytes = rc;
3374 rdata->pid = pid;
3375 rdata->read_into_pages = cifs_uncached_read_into_pages;
3376 rdata->copy_into_pages = cifs_uncached_copy_into_pages;
3377 rdata->credits = credits;
3378
3379 rc = 0;
3380 if (rdata->cfile->invalidHandle)
3381 rc = cifs_reopen_file(rdata->cfile, true);
3382
3383 if (!rc)
3384 rc = server->ops->async_readv(rdata);
3385
3386 if (rc) {
3387 add_credits_and_wake_if(server, rdata->credits, 0);
3388 kref_put(&rdata->refcount,
3389 cifs_direct_readdata_release);
3390 if (rc == -EAGAIN)
3391 continue;
3392 break;
3393 }
3394
3395 wait_for_completion(&rdata->done);
3396 rc = rdata->result;
3397 if (rc) {
3398 kref_put(
3399 &rdata->refcount,
3400 cifs_direct_readdata_release);
3401 if (rc == -EAGAIN)
3402 continue;
3403 break;
3404 }
3405
3406 total_read += rdata->got_bytes;
3407 kref_put(&rdata->refcount, cifs_direct_readdata_release);
3408
3409 iov_iter_advance(to, cur_len);
3410 len -= cur_len;
3411 offset += cur_len;
3412 } while (len);
3413
3414 iocb->ki_pos += total_read;
3415
3416 return total_read;
3417 }
3418
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
On 5/30/2018 3:48 PM, Long Li wrote: > From: Long Li <longli@microsoft.com> > > Implement the function for direct I/O read. It doesn't support AIO, which > will be implemented in a follow up patch. > > Signed-off-by: Long Li <longli@microsoft.com> > --- > fs/cifs/cifsfs.h | 1 + > fs/cifs/file.c | 149 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ > 2 files changed, 150 insertions(+) > > diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h > index 5f02318..7fba9aa 100644 > --- a/fs/cifs/cifsfs.h > +++ b/fs/cifs/cifsfs.h > @@ -102,6 +102,7 @@ extern int cifs_open(struct inode *inode, struct file *file); > extern int cifs_close(struct inode *inode, struct file *file); > extern int cifs_closedir(struct inode *inode, struct file *file); > extern ssize_t cifs_user_readv(struct kiocb *iocb, struct iov_iter *to); > +extern ssize_t cifs_direct_readv(struct kiocb *iocb, struct iov_iter *to); > extern ssize_t cifs_strict_readv(struct kiocb *iocb, struct iov_iter *to); > extern ssize_t cifs_user_writev(struct kiocb *iocb, struct iov_iter *from); > extern ssize_t cifs_strict_writev(struct kiocb *iocb, struct iov_iter *from); > diff --git a/fs/cifs/file.c b/fs/cifs/file.c > index 87eece6..e6e6f24 100644 > --- a/fs/cifs/file.c > +++ b/fs/cifs/file.c > @@ -2955,6 +2955,18 @@ cifs_read_allocate_pages(struct cifs_readdata *rdata, unsigned int nr_pages) > return rc; > } > > +static void cifs_direct_readdata_release(struct kref *refcount) > +{ > + struct cifs_readdata *rdata = container_of(refcount, > + struct cifs_readdata, refcount); > + unsigned int i; > + > + for (i = 0; i < rdata->nr_pages; i++) > + put_page(rdata->pages[i]); > + > + cifs_readdata_release(refcount); > +} > + > static void > cifs_uncached_readdata_release(struct kref *refcount) > { > @@ -3267,6 +3279,143 @@ collect_uncached_read_data(struct cifs_aio_ctx *ctx) > complete(&ctx->done); > } > > +static void cifs_direct_readv_complete(struct work_struct *work) > +{ > + struct cifs_readdata *rdata = > + container_of(work, struct cifs_readdata, work); > + > + complete(&rdata->done); > + kref_put(&rdata->refcount, cifs_direct_readdata_release); > +} > + > +ssize_t cifs_direct_readv(struct kiocb *iocb, struct iov_iter *to) > +{ > + size_t len, cur_len, start; > + unsigned int npages, rsize, credits; > + struct file *file; > + struct cifs_sb_info *cifs_sb; > + struct cifsFileInfo *cfile; > + struct cifs_tcon *tcon; > + struct page **pagevec; > + ssize_t rc, total_read = 0; > + struct TCP_Server_Info *server; > + loff_t offset = iocb->ki_pos; > + pid_t pid; > + struct cifs_readdata *rdata; > + > + /* > + * iov_iter_get_pages_alloc() doesn't work with ITER_KVEC, > + * fall back to data copy read path > + */ > + if (to->type & ITER_KVEC) { > + cifs_dbg(FYI, "use non-direct cifs_user_readv for kvec I/O\n"); > + return cifs_user_readv(iocb, to); > + } > + > + len = iov_iter_count(to); > + if (!len) > + return 0; > + > + file = iocb->ki_filp; > + cifs_sb = CIFS_FILE_SB(file); > + cfile = file->private_data; > + tcon = tlink_tcon(cfile->tlink); > + server = tcon->ses->server; > + > + if (!server->ops->async_readv) > + return -ENOSYS; > + > + if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD) > + pid = cfile->pid; > + else > + pid = current->tgid; > + > + if ((file->f_flags & O_ACCMODE) == O_WRONLY) > + cifs_dbg(FYI, "attempting read on write only file instance\n"); Confusing. Maybe "attempting read on write-only filehandle"? > + > + do { > + rc = server->ops->wait_mtu_credits(server, cifs_sb->rsize, > + &rsize, &credits); > + if (rc) > + break; > + > + cur_len = min_t(const size_t, len, rsize); > + > + rc = iov_iter_get_pages_alloc(to, &pagevec, cur_len, &start); > + if (rc < 0) { > + cifs_dbg(VFS, > + "couldn't get user pages (rc=%zd) iter type %d" > + " iov_offset %lu count %lu\n", > + rc, to->type, to->iov_offset, to->count); > + dump_stack(); > + break; > + } > + > + rdata = cifs_readdata_direct_alloc( > + pagevec, cifs_direct_readv_complete); > + if (!rdata) { > + add_credits_and_wake_if(server, credits, 0); > + rc = -ENOMEM; > + break; > + } > + > + npages = (rc + start + PAGE_SIZE-1) / PAGE_SIZE; > + rdata->nr_pages = npages; > + rdata->page_offset = start; > + rdata->pagesz = PAGE_SIZE; > + rdata->tailsz = npages > 1 ? > + rc-(PAGE_SIZE-start)-(npages-2)*PAGE_SIZE : > + rc; This expression makes my head hurt. Surely it can be simplified, or expressed in a clearer way. > + cur_len = rc; > + > + rdata->cfile = cifsFileInfo_get(cfile); > + rdata->offset = offset; > + rdata->bytes = rc; > + rdata->pid = pid; > + rdata->read_into_pages = cifs_uncached_read_into_pages; > + rdata->copy_into_pages = cifs_uncached_copy_into_pages; > + rdata->credits = credits; > + > + rc = 0; > + if (rdata->cfile->invalidHandle) > + rc = cifs_reopen_file(rdata->cfile, true); > + > + if (!rc) > + rc = server->ops->async_readv(rdata); > + > + if (rc) { This whole rc thing is messy. Initializing to zero, setting only in one case, then testing the result, then setting it again, is twisted. I actually think a goto or two would read much more clearly. > + add_credits_and_wake_if(server, rdata->credits, 0); > + kref_put(&rdata->refcount, > + cifs_direct_readdata_release); > + if (rc == -EAGAIN) > + continue; > + break; It's worth a comment here that this either breaks or continues the entire do {} while (); and btw when it breaks it does *not* return "rc". Again, maybe a goto instead of a break? > + } > + > + wait_for_completion(&rdata->done); > + rc = rdata->result; > + if (rc) { > + kref_put( > + &rdata->refcount, > + cifs_direct_readdata_release); > + if (rc == -EAGAIN) > + continue; > + break; Ditto. > + } > + > + total_read += rdata->got_bytes; > + kref_put(&rdata->refcount, cifs_direct_readdata_release); > + > + iov_iter_advance(to, cur_len); > + len -= cur_len; > + offset += cur_len; > + } while (len); > + > + iocb->ki_pos += total_read; > + > + return total_read; > +} > + > ssize_t cifs_user_readv(struct kiocb *iocb, struct iov_iter *to) > { > struct file *file = iocb->ki_filp; > -- To unsubscribe from this list: send the line "unsubscribe linux-cifs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
PiBTdWJqZWN0OiBSZTogW1BhdGNoIHYyIDEzLzE1XSBDSUZTOiBBZGQgc3VwcG9ydCBmb3IgZGly ZWN0IEkvTyByZWFkDQo+IA0KPiANCj4gDQo+IE9uIDUvMzAvMjAxOCAzOjQ4IFBNLCBMb25nIExp IHdyb3RlOg0KPiA+IEZyb206IExvbmcgTGkgPGxvbmdsaUBtaWNyb3NvZnQuY29tPg0KPiA+DQo+ ID4gSW1wbGVtZW50IHRoZSBmdW5jdGlvbiBmb3IgZGlyZWN0IEkvTyByZWFkLiBJdCBkb2Vzbid0 IHN1cHBvcnQgQUlPLA0KPiA+IHdoaWNoIHdpbGwgYmUgaW1wbGVtZW50ZWQgaW4gYSBmb2xsb3cg dXAgcGF0Y2guDQo+ID4NCj4gPiBTaWduZWQtb2ZmLWJ5OiBMb25nIExpIDxsb25nbGlAbWljcm9z b2Z0LmNvbT4NCj4gPiAtLS0NCj4gPiAgIGZzL2NpZnMvY2lmc2ZzLmggfCAgIDEgKw0KPiA+ICAg ZnMvY2lmcy9maWxlLmMgICB8IDE0OQ0KPiArKysrKysrKysrKysrKysrKysrKysrKysrKysrKysr KysrKysrKysrKysrKysrKysrKysrKysrDQo+ID4gICAyIGZpbGVzIGNoYW5nZWQsIDE1MCBpbnNl cnRpb25zKCspDQo+ID4NCj4gPiBkaWZmIC0tZ2l0IGEvZnMvY2lmcy9jaWZzZnMuaCBiL2ZzL2Np ZnMvY2lmc2ZzLmggaW5kZXgNCj4gPiA1ZjAyMzE4Li43ZmJhOWFhIDEwMDY0NA0KPiA+IC0tLSBh L2ZzL2NpZnMvY2lmc2ZzLmgNCj4gPiArKysgYi9mcy9jaWZzL2NpZnNmcy5oDQo+ID4gQEAgLTEw Miw2ICsxMDIsNyBAQCBleHRlcm4gaW50IGNpZnNfb3BlbihzdHJ1Y3QgaW5vZGUgKmlub2RlLCBz dHJ1Y3QgZmlsZQ0KPiAqZmlsZSk7DQo+ID4gICBleHRlcm4gaW50IGNpZnNfY2xvc2Uoc3RydWN0 IGlub2RlICppbm9kZSwgc3RydWN0IGZpbGUgKmZpbGUpOw0KPiA+ICAgZXh0ZXJuIGludCBjaWZz X2Nsb3NlZGlyKHN0cnVjdCBpbm9kZSAqaW5vZGUsIHN0cnVjdCBmaWxlICpmaWxlKTsNCj4gPiAg IGV4dGVybiBzc2l6ZV90IGNpZnNfdXNlcl9yZWFkdihzdHJ1Y3Qga2lvY2IgKmlvY2IsIHN0cnVj dCBpb3ZfaXRlcg0KPiA+ICp0byk7DQo+ID4gK2V4dGVybiBzc2l6ZV90IGNpZnNfZGlyZWN0X3Jl YWR2KHN0cnVjdCBraW9jYiAqaW9jYiwgc3RydWN0IGlvdl9pdGVyDQo+ID4gKyp0byk7DQo+ID4g ICBleHRlcm4gc3NpemVfdCBjaWZzX3N0cmljdF9yZWFkdihzdHJ1Y3Qga2lvY2IgKmlvY2IsIHN0 cnVjdCBpb3ZfaXRlciAqdG8pOw0KPiA+ICAgZXh0ZXJuIHNzaXplX3QgY2lmc191c2VyX3dyaXRl dihzdHJ1Y3Qga2lvY2IgKmlvY2IsIHN0cnVjdCBpb3ZfaXRlciAqZnJvbSk7DQo+ID4gICBleHRl cm4gc3NpemVfdCBjaWZzX3N0cmljdF93cml0ZXYoc3RydWN0IGtpb2NiICppb2NiLCBzdHJ1Y3QN Cj4gPiBpb3ZfaXRlciAqZnJvbSk7IGRpZmYgLS1naXQgYS9mcy9jaWZzL2ZpbGUuYyBiL2ZzL2Np ZnMvZmlsZS5jIGluZGV4DQo+ID4gODdlZWNlNi4uZTZlNmYyNCAxMDA2NDQNCj4gPiAtLS0gYS9m cy9jaWZzL2ZpbGUuYw0KPiA+ICsrKyBiL2ZzL2NpZnMvZmlsZS5jDQo+ID4gQEAgLTI5NTUsNiAr Mjk1NSwxOCBAQCBjaWZzX3JlYWRfYWxsb2NhdGVfcGFnZXMoc3RydWN0IGNpZnNfcmVhZGRhdGEN Cj4gKnJkYXRhLCB1bnNpZ25lZCBpbnQgbnJfcGFnZXMpDQo+ID4gICAJcmV0dXJuIHJjOw0KPiA+ ICAgfQ0KPiA+DQo+ID4gK3N0YXRpYyB2b2lkIGNpZnNfZGlyZWN0X3JlYWRkYXRhX3JlbGVhc2Uo c3RydWN0IGtyZWYgKnJlZmNvdW50KSB7DQo+ID4gKwlzdHJ1Y3QgY2lmc19yZWFkZGF0YSAqcmRh dGEgPSBjb250YWluZXJfb2YocmVmY291bnQsDQo+ID4gKwkJCQkJc3RydWN0IGNpZnNfcmVhZGRh dGEsIHJlZmNvdW50KTsNCj4gPiArCXVuc2lnbmVkIGludCBpOw0KPiA+ICsNCj4gPiArCWZvciAo aSA9IDA7IGkgPCByZGF0YS0+bnJfcGFnZXM7IGkrKykNCj4gPiArCQlwdXRfcGFnZShyZGF0YS0+ cGFnZXNbaV0pOw0KPiA+ICsNCj4gPiArCWNpZnNfcmVhZGRhdGFfcmVsZWFzZShyZWZjb3VudCk7 DQo+ID4gK30NCj4gPiArDQo+ID4gICBzdGF0aWMgdm9pZA0KPiA+ICAgY2lmc191bmNhY2hlZF9y ZWFkZGF0YV9yZWxlYXNlKHN0cnVjdCBrcmVmICpyZWZjb3VudCkNCj4gPiAgIHsNCj4gPiBAQCAt MzI2Nyw2ICszMjc5LDE0MyBAQCBjb2xsZWN0X3VuY2FjaGVkX3JlYWRfZGF0YShzdHJ1Y3QNCj4g Y2lmc19haW9fY3R4ICpjdHgpDQo+ID4gICAJCWNvbXBsZXRlKCZjdHgtPmRvbmUpOw0KPiA+ICAg fQ0KPiA+DQo+ID4gK3N0YXRpYyB2b2lkIGNpZnNfZGlyZWN0X3JlYWR2X2NvbXBsZXRlKHN0cnVj dCB3b3JrX3N0cnVjdCAqd29yaykgew0KPiA+ICsJc3RydWN0IGNpZnNfcmVhZGRhdGEgKnJkYXRh ID0NCj4gPiArCQljb250YWluZXJfb2Yod29yaywgc3RydWN0IGNpZnNfcmVhZGRhdGEsIHdvcmsp Ow0KPiA+ICsNCj4gPiArCWNvbXBsZXRlKCZyZGF0YS0+ZG9uZSk7DQo+ID4gKwlrcmVmX3B1dCgm cmRhdGEtPnJlZmNvdW50LCBjaWZzX2RpcmVjdF9yZWFkZGF0YV9yZWxlYXNlKTsgfQ0KPiA+ICsN Cj4gPiArc3NpemVfdCBjaWZzX2RpcmVjdF9yZWFkdihzdHJ1Y3Qga2lvY2IgKmlvY2IsIHN0cnVj dCBpb3ZfaXRlciAqdG8pIHsNCj4gPiArCXNpemVfdCBsZW4sIGN1cl9sZW4sIHN0YXJ0Ow0KPiA+ ICsJdW5zaWduZWQgaW50IG5wYWdlcywgcnNpemUsIGNyZWRpdHM7DQo+ID4gKwlzdHJ1Y3QgZmls ZSAqZmlsZTsNCj4gPiArCXN0cnVjdCBjaWZzX3NiX2luZm8gKmNpZnNfc2I7DQo+ID4gKwlzdHJ1 Y3QgY2lmc0ZpbGVJbmZvICpjZmlsZTsNCj4gPiArCXN0cnVjdCBjaWZzX3Rjb24gKnRjb247DQo+ ID4gKwlzdHJ1Y3QgcGFnZSAqKnBhZ2V2ZWM7DQo+ID4gKwlzc2l6ZV90IHJjLCB0b3RhbF9yZWFk ID0gMDsNCj4gPiArCXN0cnVjdCBUQ1BfU2VydmVyX0luZm8gKnNlcnZlcjsNCj4gPiArCWxvZmZf dCBvZmZzZXQgPSBpb2NiLT5raV9wb3M7DQo+ID4gKwlwaWRfdCBwaWQ7DQo+ID4gKwlzdHJ1Y3Qg Y2lmc19yZWFkZGF0YSAqcmRhdGE7DQo+ID4gKw0KPiA+ICsJLyoNCj4gPiArCSAqIGlvdl9pdGVy X2dldF9wYWdlc19hbGxvYygpIGRvZXNuJ3Qgd29yayB3aXRoIElURVJfS1ZFQywNCj4gPiArCSAq IGZhbGwgYmFjayB0byBkYXRhIGNvcHkgcmVhZCBwYXRoDQo+ID4gKwkgKi8NCj4gPiArCWlmICh0 by0+dHlwZSAmIElURVJfS1ZFQykgew0KPiA+ICsJCWNpZnNfZGJnKEZZSSwgInVzZSBub24tZGly ZWN0IGNpZnNfdXNlcl9yZWFkdiBmb3Iga3ZlYw0KPiBJL09cbiIpOw0KPiA+ICsJCXJldHVybiBj aWZzX3VzZXJfcmVhZHYoaW9jYiwgdG8pOw0KPiA+ICsJfQ0KPiA+ICsNCj4gPiArCWxlbiA9IGlv dl9pdGVyX2NvdW50KHRvKTsNCj4gPiArCWlmICghbGVuKQ0KPiA+ICsJCXJldHVybiAwOw0KPiA+ ICsNCj4gPiArCWZpbGUgPSBpb2NiLT5raV9maWxwOw0KPiA+ICsJY2lmc19zYiA9IENJRlNfRklM RV9TQihmaWxlKTsNCj4gPiArCWNmaWxlID0gZmlsZS0+cHJpdmF0ZV9kYXRhOw0KPiA+ICsJdGNv biA9IHRsaW5rX3Rjb24oY2ZpbGUtPnRsaW5rKTsNCj4gPiArCXNlcnZlciA9IHRjb24tPnNlcy0+ c2VydmVyOw0KPiA+ICsNCj4gPiArCWlmICghc2VydmVyLT5vcHMtPmFzeW5jX3JlYWR2KQ0KPiA+ ICsJCXJldHVybiAtRU5PU1lTOw0KPiA+ICsNCj4gPiArCWlmIChjaWZzX3NiLT5tbnRfY2lmc19m bGFncyAmIENJRlNfTU9VTlRfUldQSURGT1JXQVJEKQ0KPiA+ICsJCXBpZCA9IGNmaWxlLT5waWQ7 DQo+ID4gKwllbHNlDQo+ID4gKwkJcGlkID0gY3VycmVudC0+dGdpZDsNCj4gPiArDQo+ID4gKwlp ZiAoKGZpbGUtPmZfZmxhZ3MgJiBPX0FDQ01PREUpID09IE9fV1JPTkxZKQ0KPiA+ICsJCWNpZnNf ZGJnKEZZSSwgImF0dGVtcHRpbmcgcmVhZCBvbiB3cml0ZSBvbmx5IGZpbGUgaW5zdGFuY2VcbiIp Ow0KPiANCj4gQ29uZnVzaW5nLiBNYXliZSAiYXR0ZW1wdGluZyByZWFkIG9uIHdyaXRlLW9ubHkg ZmlsZWhhbmRsZSI/DQo+IA0KPiA+ICsNCj4gPiArCWRvIHsNCj4gPiArCQlyYyA9IHNlcnZlci0+ b3BzLT53YWl0X210dV9jcmVkaXRzKHNlcnZlciwgY2lmc19zYi0+cnNpemUsDQo+ID4gKwkJCQkJ JnJzaXplLCAmY3JlZGl0cyk7DQo+ID4gKwkJaWYgKHJjKQ0KPiA+ICsJCQlicmVhazsNCj4gPiAr DQo+ID4gKwkJY3VyX2xlbiA9IG1pbl90KGNvbnN0IHNpemVfdCwgbGVuLCByc2l6ZSk7DQo+ID4g Kw0KPiA+ICsJCXJjID0gaW92X2l0ZXJfZ2V0X3BhZ2VzX2FsbG9jKHRvLCAmcGFnZXZlYywgY3Vy X2xlbiwgJnN0YXJ0KTsNCj4gPiArCQlpZiAocmMgPCAwKSB7DQo+ID4gKwkJCWNpZnNfZGJnKFZG UywNCj4gPiArCQkJCSJjb3VsZG4ndCBnZXQgdXNlciBwYWdlcyAocmM9JXpkKSBpdGVyDQo+IHR5 cGUgJWQiDQo+ID4gKwkJCQkiIGlvdl9vZmZzZXQgJWx1IGNvdW50ICVsdVxuIiwNCj4gPiArCQkJ CXJjLCB0by0+dHlwZSwgdG8tPmlvdl9vZmZzZXQsIHRvLT5jb3VudCk7DQo+ID4gKwkJCWR1bXBf c3RhY2soKTsNCj4gPiArCQkJYnJlYWs7DQo+ID4gKwkJfQ0KPiA+ICsNCj4gPiArCQlyZGF0YSA9 IGNpZnNfcmVhZGRhdGFfZGlyZWN0X2FsbG9jKA0KPiA+ICsJCQkJcGFnZXZlYywgY2lmc19kaXJl Y3RfcmVhZHZfY29tcGxldGUpOw0KPiA+ICsJCWlmICghcmRhdGEpIHsNCj4gPiArCQkJYWRkX2Ny ZWRpdHNfYW5kX3dha2VfaWYoc2VydmVyLCBjcmVkaXRzLCAwKTsNCj4gPiArCQkJcmMgPSAtRU5P TUVNOw0KPiA+ICsJCQlicmVhazsNCj4gPiArCQl9DQo+ID4gKw0KPiA+ICsJCW5wYWdlcyA9IChy YyArIHN0YXJ0ICsgUEFHRV9TSVpFLTEpIC8gUEFHRV9TSVpFOw0KPiA+ICsJCXJkYXRhLT5ucl9w YWdlcyA9IG5wYWdlczsNCj4gPiArCQlyZGF0YS0+cGFnZV9vZmZzZXQgPSBzdGFydDsNCj4gPiAr CQlyZGF0YS0+cGFnZXN6ID0gUEFHRV9TSVpFOw0KPiA+ICsJCXJkYXRhLT50YWlsc3ogPSBucGFn ZXMgPiAxID8NCj4gPiArCQkJCXJjLShQQUdFX1NJWkUtc3RhcnQpLShucGFnZXMtMikqUEFHRV9T SVpFIDoNCj4gPiArCQkJCXJjOw0KPiANCj4gVGhpcyBleHByZXNzaW9uIG1ha2VzIG15IGhlYWQg aHVydC4gU3VyZWx5IGl0IGNhbiBiZSBzaW1wbGlmaWVkLCBvciBleHByZXNzZWQNCj4gaW4gYSBj bGVhcmVyIHdheS4NCj4gDQo+ID4gKwkJY3VyX2xlbiA9IHJjOw0KPiA+ICsNCj4gPiArCQlyZGF0 YS0+Y2ZpbGUgPSBjaWZzRmlsZUluZm9fZ2V0KGNmaWxlKTsNCj4gPiArCQlyZGF0YS0+b2Zmc2V0 ID0gb2Zmc2V0Ow0KPiA+ICsJCXJkYXRhLT5ieXRlcyA9IHJjOw0KPiA+ICsJCXJkYXRhLT5waWQg PSBwaWQ7DQo+ID4gKwkJcmRhdGEtPnJlYWRfaW50b19wYWdlcyA9IGNpZnNfdW5jYWNoZWRfcmVh ZF9pbnRvX3BhZ2VzOw0KPiA+ICsJCXJkYXRhLT5jb3B5X2ludG9fcGFnZXMgPSBjaWZzX3VuY2Fj aGVkX2NvcHlfaW50b19wYWdlczsNCj4gPiArCQlyZGF0YS0+Y3JlZGl0cyA9IGNyZWRpdHM7DQo+ ID4gKw0KPiA+ICsJCXJjID0gMDsNCj4gPiArCQlpZiAocmRhdGEtPmNmaWxlLT5pbnZhbGlkSGFu ZGxlKQ0KPiA+ICsJCQlyYyA9IGNpZnNfcmVvcGVuX2ZpbGUocmRhdGEtPmNmaWxlLCB0cnVlKTsN Cj4gPiArDQo+ID4gKwkJaWYgKCFyYykNCj4gPiArCQkJcmMgPSBzZXJ2ZXItPm9wcy0+YXN5bmNf cmVhZHYocmRhdGEpOw0KPiA+ICsNCj4gPiArCQlpZiAocmMpIHsNCj4gDQo+IFRoaXMgd2hvbGUg cmMgdGhpbmcgaXMgbWVzc3kuIEluaXRpYWxpemluZyB0byB6ZXJvLCBzZXR0aW5nIG9ubHkgaW4g b25lIGNhc2UsIHRoZW4NCj4gdGVzdGluZyB0aGUgcmVzdWx0LCB0aGVuIHNldHRpbmcgaXQgYWdh aW4sIGlzIHR3aXN0ZWQuDQo+IEkgYWN0dWFsbHkgdGhpbmsgYSBnb3RvIG9yIHR3byB3b3VsZCBy ZWFkIG11Y2ggbW9yZSBjbGVhcmx5Lg0KPiANCj4gPiArCQkJYWRkX2NyZWRpdHNfYW5kX3dha2Vf aWYoc2VydmVyLCByZGF0YS0+Y3JlZGl0cywgMCk7DQo+ID4gKwkJCWtyZWZfcHV0KCZyZGF0YS0+ cmVmY291bnQsDQo+ID4gKwkJCQkgY2lmc19kaXJlY3RfcmVhZGRhdGFfcmVsZWFzZSk7DQo+ID4g KwkJCWlmIChyYyA9PSAtRUFHQUlOKQ0KPiA+ICsJCQkJY29udGludWU7DQo+ID4gKwkJCWJyZWFr Ow0KPiANCj4gSXQncyB3b3J0aCBhIGNvbW1lbnQgaGVyZSB0aGF0IHRoaXMgZWl0aGVyIGJyZWFr cyBvciBjb250aW51ZXMgdGhlIGVudGlyZSBkbyB7fQ0KPiB3aGlsZSAoKTsgYW5kIGJ0dyB3aGVu IGl0IGJyZWFrcyBpdCBkb2VzICpub3QqIHJldHVybiAicmMiLg0KPiBBZ2FpbiwgbWF5YmUgYSBn b3RvIGluc3RlYWQgb2YgYSBicmVhaz8NCj4gDQo+ID4gKwkJfQ0KPiA+ICsNCj4gPiArCQl3YWl0 X2Zvcl9jb21wbGV0aW9uKCZyZGF0YS0+ZG9uZSk7DQo+ID4gKwkJcmMgPSByZGF0YS0+cmVzdWx0 Ow0KPiA+ICsJCWlmIChyYykgew0KPiA+ICsJCQlrcmVmX3B1dCgNCj4gPiArCQkJCSZyZGF0YS0+ cmVmY291bnQsDQo+ID4gKwkJCQljaWZzX2RpcmVjdF9yZWFkZGF0YV9yZWxlYXNlKTsNCj4gPiAr CQkJaWYgKHJjID09IC1FQUdBSU4pDQo+ID4gKwkJCQljb250aW51ZTsNCj4gPiArCQkJYnJlYWs7 DQo+IA0KPiBEaXR0by4NCg0KSSB3aWxsIHJlLXdvcmsgdGhpcyBwYXRjaC4NCg0KPiANCj4gPiAr CQl9DQo+ID4gKw0KPiA+ICsJCXRvdGFsX3JlYWQgKz0gcmRhdGEtPmdvdF9ieXRlczsNCj4gPiAr CQlrcmVmX3B1dCgmcmRhdGEtPnJlZmNvdW50LCBjaWZzX2RpcmVjdF9yZWFkZGF0YV9yZWxlYXNl KTsNCj4gPiArDQo+ID4gKwkJaW92X2l0ZXJfYWR2YW5jZSh0bywgY3VyX2xlbik7DQo+ID4gKwkJ bGVuIC09IGN1cl9sZW47DQo+ID4gKwkJb2Zmc2V0ICs9IGN1cl9sZW47DQo+ID4gKwl9IHdoaWxl IChsZW4pOw0KPiA+ICsNCj4gPiArCWlvY2ItPmtpX3BvcyArPSB0b3RhbF9yZWFkOw0KPiA+ICsN Cj4gPiArCXJldHVybiB0b3RhbF9yZWFkOw0KPiA+ICt9DQo+ID4gKw0KPiA+ICAgc3NpemVfdCBj aWZzX3VzZXJfcmVhZHYoc3RydWN0IGtpb2NiICppb2NiLCBzdHJ1Y3QgaW92X2l0ZXIgKnRvKQ0K PiA+ICAgew0KPiA+ICAgCXN0cnVjdCBmaWxlICpmaWxlID0gaW9jYi0+a2lfZmlscDsNCj4gPg0K -- To unsubscribe from this list: send the line "unsubscribe linux-cifs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h index 5f02318..7fba9aa 100644 --- a/fs/cifs/cifsfs.h +++ b/fs/cifs/cifsfs.h @@ -102,6 +102,7 @@ extern int cifs_open(struct inode *inode, struct file *file); extern int cifs_close(struct inode *inode, struct file *file); extern int cifs_closedir(struct inode *inode, struct file *file); extern ssize_t cifs_user_readv(struct kiocb *iocb, struct iov_iter *to); +extern ssize_t cifs_direct_readv(struct kiocb *iocb, struct iov_iter *to); extern ssize_t cifs_strict_readv(struct kiocb *iocb, struct iov_iter *to); extern ssize_t cifs_user_writev(struct kiocb *iocb, struct iov_iter *from); extern ssize_t cifs_strict_writev(struct kiocb *iocb, struct iov_iter *from); diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 87eece6..e6e6f24 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -2955,6 +2955,18 @@ cifs_read_allocate_pages(struct cifs_readdata *rdata, unsigned int nr_pages) return rc; } +static void cifs_direct_readdata_release(struct kref *refcount) +{ + struct cifs_readdata *rdata = container_of(refcount, + struct cifs_readdata, refcount); + unsigned int i; + + for (i = 0; i < rdata->nr_pages; i++) + put_page(rdata->pages[i]); + + cifs_readdata_release(refcount); +} + static void cifs_uncached_readdata_release(struct kref *refcount) { @@ -3267,6 +3279,143 @@ collect_uncached_read_data(struct cifs_aio_ctx *ctx) complete(&ctx->done); } +static void cifs_direct_readv_complete(struct work_struct *work) +{ + struct cifs_readdata *rdata = + container_of(work, struct cifs_readdata, work); + + complete(&rdata->done); + kref_put(&rdata->refcount, cifs_direct_readdata_release); +} + +ssize_t cifs_direct_readv(struct kiocb *iocb, struct iov_iter *to) +{ + size_t len, cur_len, start; + unsigned int npages, rsize, credits; + struct file *file; + struct cifs_sb_info *cifs_sb; + struct cifsFileInfo *cfile; + struct cifs_tcon *tcon; + struct page **pagevec; + ssize_t rc, total_read = 0; + struct TCP_Server_Info *server; + loff_t offset = iocb->ki_pos; + pid_t pid; + struct cifs_readdata *rdata; + + /* + * iov_iter_get_pages_alloc() doesn't work with ITER_KVEC, + * fall back to data copy read path + */ + if (to->type & ITER_KVEC) { + cifs_dbg(FYI, "use non-direct cifs_user_readv for kvec I/O\n"); + return cifs_user_readv(iocb, to); + } + + len = iov_iter_count(to); + if (!len) + return 0; + + file = iocb->ki_filp; + cifs_sb = CIFS_FILE_SB(file); + cfile = file->private_data; + tcon = tlink_tcon(cfile->tlink); + server = tcon->ses->server; + + if (!server->ops->async_readv) + return -ENOSYS; + + if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD) + pid = cfile->pid; + else + pid = current->tgid; + + if ((file->f_flags & O_ACCMODE) == O_WRONLY) + cifs_dbg(FYI, "attempting read on write only file instance\n"); + + do { + rc = server->ops->wait_mtu_credits(server, cifs_sb->rsize, + &rsize, &credits); + if (rc) + break; + + cur_len = min_t(const size_t, len, rsize); + + rc = iov_iter_get_pages_alloc(to, &pagevec, cur_len, &start); + if (rc < 0) { + cifs_dbg(VFS, + "couldn't get user pages (rc=%zd) iter type %d" + " iov_offset %lu count %lu\n", + rc, to->type, to->iov_offset, to->count); + dump_stack(); + break; + } + + rdata = cifs_readdata_direct_alloc( + pagevec, cifs_direct_readv_complete); + if (!rdata) { + add_credits_and_wake_if(server, credits, 0); + rc = -ENOMEM; + break; + } + + npages = (rc + start + PAGE_SIZE-1) / PAGE_SIZE; + rdata->nr_pages = npages; + rdata->page_offset = start; + rdata->pagesz = PAGE_SIZE; + rdata->tailsz = npages > 1 ? + rc-(PAGE_SIZE-start)-(npages-2)*PAGE_SIZE : + rc; + cur_len = rc; + + rdata->cfile = cifsFileInfo_get(cfile); + rdata->offset = offset; + rdata->bytes = rc; + rdata->pid = pid; + rdata->read_into_pages = cifs_uncached_read_into_pages; + rdata->copy_into_pages = cifs_uncached_copy_into_pages; + rdata->credits = credits; + + rc = 0; + if (rdata->cfile->invalidHandle) + rc = cifs_reopen_file(rdata->cfile, true); + + if (!rc) + rc = server->ops->async_readv(rdata); + + if (rc) { + add_credits_and_wake_if(server, rdata->credits, 0); + kref_put(&rdata->refcount, + cifs_direct_readdata_release); + if (rc == -EAGAIN) + continue; + break; + } + + wait_for_completion(&rdata->done); + rc = rdata->result; + if (rc) { + kref_put( + &rdata->refcount, + cifs_direct_readdata_release); + if (rc == -EAGAIN) + continue; + break; + } + + total_read += rdata->got_bytes; + kref_put(&rdata->refcount, cifs_direct_readdata_release); + + iov_iter_advance(to, cur_len); + len -= cur_len; + offset += cur_len; + } while (len); + + iocb->ki_pos += total_read; + + return total_read; +} + ssize_t cifs_user_readv(struct kiocb *iocb, struct iov_iter *to) { struct file *file = iocb->ki_filp;