#include <linux/seq_file.h>
#include <linux/vfs.h>
#include <linux/mempool.h>
+#include <linux/delay.h>
#include "cifsfs.h"
#include "cifspdu.h"
#define DECLARE_GLOBALS_HERE
unsigned int sign_CIFS_PDUs = 1;
extern struct task_struct * oplockThread; /* remove sparse warning */
struct task_struct * oplockThread = NULL;
+extern struct task_struct * dnotifyThread; /* remove sparse warning */
+struct task_struct * dnotifyThread = NULL;
unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE;
module_param(CIFSMaxBufSize, int, 0);
MODULE_PARM_DESC(CIFSMaxBufSize,"Network buffer size (not including header). Default: 16384 Range: 8192 to 130048");
MODULE_PARM_DESC(cifs_max_pending,"Simultaneous requests to server. Default: 50 Range: 2 to 256");
static DECLARE_COMPLETION(cifs_oplock_exited);
+static DECLARE_COMPLETION(cifs_dnotify_exited);
extern mempool_t *cifs_sm_req_poolp;
extern mempool_t *cifs_req_poolp;
#endif /* CIFS_EXPERIMENTAL */
rc = CIFSSMBQFSInfo(xid, pTcon, buf);
+ /* Old Windows servers do not support level 103, retry with level
+ one if old server failed the previous call */
+ if(rc)
+ rc = SMBOldQFSInfo(xid, pTcon, buf);
/*
int f_type;
__fsid_t f_fsid;
cifs_inode->clientCanCacheAll = FALSE;
cifs_inode->vfs_inode.i_blksize = CIFS_MAX_MSGSIZE;
cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
-
+ cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;
INIT_LIST_HEAD(&cifs_inode->openFileList);
return &cifs_inode->vfs_inode;
}
};
#endif
+#ifdef CONFIG_CIFS_EXPERIMENTAL
+static void cifs_umount_begin(struct super_block * sblock)
+{
+ struct cifs_sb_info *cifs_sb;
+ struct cifsTconInfo * tcon;
+
+ cifs_sb = CIFS_SB(sblock);
+ if(cifs_sb == NULL)
+ return;
+
+ tcon = cifs_sb->tcon;
+ if(tcon == NULL)
+ return;
+ down(&tcon->tconSem);
+ if (atomic_read(&tcon->useCount) == 1)
+ tcon->tidStatus = CifsExiting;
+ up(&tcon->tconSem);
+
+ /* cancel_brl_requests(tcon); */
+ /* cancel_notify_requests(tcon); */
+ if(tcon->ses && tcon->ses->server)
+ {
+ cFYI(1,("wake up tasks now - umount begin not complete"));
+ wake_up_all(&tcon->ses->server->request_q);
+ wake_up_all(&tcon->ses->server->response_q);
+ msleep(1); /* yield */
+ /* we have to kick the requests once more */
+ wake_up_all(&tcon->ses->server->response_q);
+ msleep(1);
+ }
+/* BB FIXME - finish add checks for tidStatus BB */
+
+ return;
+}
+#endif
+
static int cifs_remount(struct super_block *sb, int *flags, char *data)
{
*flags |= MS_NODIRATIME;
unless later we add lazy close of inodes or unless the kernel forgets to call
us with the same number of releases (closes) as opens */
.show_options = cifs_show_options,
-/* .umount_begin = cifs_umount_begin, *//* consider adding in the future */
+#ifdef CONFIG_CIFS_EXPERIMENTAL
+ .umount_begin = cifs_umount_begin,
+#endif
.remount_fs = cifs_remount,
};
return sb;
}
-static ssize_t
-cifs_read_wrapper(struct file * file, char __user *read_data, size_t read_size,
- loff_t * poffset)
+static ssize_t cifs_file_writev(struct file *file, const struct iovec *iov,
+ unsigned long nr_segs, loff_t *ppos)
{
- if(file->f_dentry == NULL)
- return -EIO;
- else if(file->f_dentry->d_inode == NULL)
- return -EIO;
-
- cFYI(1,("In read_wrapper size %zd at %lld",read_size,*poffset));
+ struct inode *inode = file->f_dentry->d_inode;
+ ssize_t written;
- if(CIFS_I(file->f_dentry->d_inode)->clientCanCacheRead) {
- return generic_file_read(file,read_data,read_size,poffset);
- } else {
- /* BB do we need to lock inode from here until after invalidate? */
-/* if(file->f_dentry->d_inode->i_mapping) {
- filemap_fdatawrite(file->f_dentry->d_inode->i_mapping);
- filemap_fdatawait(file->f_dentry->d_inode->i_mapping);
- }*/
-/* cifs_revalidate(file->f_dentry);*/ /* BB fixme */
-
- /* BB we should make timer configurable - perhaps
- by simply calling cifs_revalidate here */
- /* invalidate_remote_inode(file->f_dentry->d_inode);*/
- return generic_file_read(file,read_data,read_size,poffset);
- }
+ written = generic_file_writev(file, iov, nr_segs, ppos);
+ if (!CIFS_I(inode)->clientCanCacheAll)
+ filemap_fdatawrite(inode->i_mapping);
+ return written;
}
-static ssize_t
-cifs_write_wrapper(struct file * file, const char __user *write_data,
- size_t write_size, loff_t * poffset)
+static ssize_t cifs_file_aio_write(struct kiocb *iocb, const char __user *buf,
+ size_t count, loff_t pos)
{
+ struct inode *inode = iocb->ki_filp->f_dentry->d_inode;
ssize_t written;
- if(file->f_dentry == NULL)
- return -EIO;
- else if(file->f_dentry->d_inode == NULL)
- return -EIO;
-
- cFYI(1,("In write_wrapper size %zd at %lld",write_size,*poffset));
-
- written = generic_file_write(file,write_data,write_size,poffset);
- if(!CIFS_I(file->f_dentry->d_inode)->clientCanCacheAll) {
- if(file->f_dentry->d_inode->i_mapping) {
- filemap_fdatawrite(file->f_dentry->d_inode->i_mapping);
- }
- }
+ written = generic_file_aio_write(iocb, buf, count, pos);
+ if (!CIFS_I(inode)->clientCanCacheAll)
+ filemap_fdatawrite(inode->i_mapping);
return written;
}
+static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
+{
+ /* origin == SEEK_END => we must revalidate the cached file length */
+ if (origin == 2) {
+ int retval = cifs_revalidate(file->f_dentry);
+ if (retval < 0)
+ return (loff_t)retval;
+ }
+ return remote_llseek(file, offset, origin);
+}
static struct file_system_type cifs_fs_type = {
.owner = THIS_MODULE,
};
struct file_operations cifs_file_ops = {
- .read = cifs_read_wrapper,
- .write = cifs_write_wrapper,
+ .read = do_sync_read,
+ .write = do_sync_write,
+ .readv = generic_file_readv,
+ .writev = cifs_file_writev,
+ .aio_read = generic_file_aio_read,
+ .aio_write = cifs_file_aio_write,
.open = cifs_open,
.release = cifs_close,
.lock = cifs_lock,
.flush = cifs_flush,
.mmap = cifs_file_mmap,
.sendfile = generic_file_sendfile,
+ .llseek = cifs_llseek,
#ifdef CONFIG_CIFS_POSIX
.ioctl = cifs_ioctl,
#endif /* CONFIG_CIFS_POSIX */
#ifdef CONFIG_CIFS_EXPERIMENTAL
- .readv = generic_file_readv,
- .writev = generic_file_writev,
- .aio_read = generic_file_aio_read,
- .aio_write = generic_file_aio_write,
.dir_notify = cifs_dir_notify,
#endif /* CONFIG_CIFS_EXPERIMENTAL */
};
#ifdef CONFIG_CIFS_POSIX
.ioctl = cifs_ioctl,
#endif /* CONFIG_CIFS_POSIX */
+ .llseek = cifs_llseek,
+#ifdef CONFIG_CIFS_EXPERIMENTAL
+ .dir_notify = cifs_dir_notify,
+#endif /* CONFIG_CIFS_EXPERIMENTAL */
+};
+struct file_operations cifs_file_nobrl_ops = {
+ .read = do_sync_read,
+ .write = do_sync_write,
+ .readv = generic_file_readv,
+ .writev = cifs_file_writev,
+ .aio_read = generic_file_aio_read,
+ .aio_write = cifs_file_aio_write,
+ .open = cifs_open,
+ .release = cifs_close,
+ .fsync = cifs_fsync,
+ .flush = cifs_flush,
+ .mmap = cifs_file_mmap,
+ .sendfile = generic_file_sendfile,
+ .llseek = cifs_llseek,
+#ifdef CONFIG_CIFS_POSIX
+ .ioctl = cifs_ioctl,
+#endif /* CONFIG_CIFS_POSIX */
#ifdef CONFIG_CIFS_EXPERIMENTAL
.dir_notify = cifs_dir_notify,
#endif /* CONFIG_CIFS_EXPERIMENTAL */
};
+struct file_operations cifs_file_direct_nobrl_ops = {
+ /* no mmap, no aio, no readv -
+ BB reevaluate whether they can be done with directio, no cache */
+ .read = cifs_user_read,
+ .write = cifs_user_write,
+ .open = cifs_open,
+ .release = cifs_close,
+ .fsync = cifs_fsync,
+ .flush = cifs_flush,
+ .sendfile = generic_file_sendfile, /* BB removeme BB */
+#ifdef CONFIG_CIFS_POSIX
+ .ioctl = cifs_ioctl,
+#endif /* CONFIG_CIFS_POSIX */
+ .llseek = cifs_llseek,
+#ifdef CONFIG_CIFS_EXPERIMENTAL
+ .dir_notify = cifs_dir_notify,
+#endif /* CONFIG_CIFS_EXPERIMENTAL */
+};
+
struct file_operations cifs_dir_ops = {
.readdir = cifs_readdir,
.release = cifs_closedir,
kmem_cache_destroy(cifs_req_cachep);
return -ENOMEM;
}
- /* 256 (MAX_CIFS_HDR_SIZE bytes is enough for most SMB responses and
+ /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
almost all handle based requests (but not write response, nor is it
sufficient for path based requests). A smaller size would have
been more efficient (compacting multiple slab items on one 4k page)
efficient to alloc 1 per page off the slab compared to 17K (5page)
alloc of large cifs buffers even when page debugging is on */
cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
- MAX_CIFS_HDR_SIZE, 0, SLAB_HWCACHE_ALIGN, NULL, NULL);
+ MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
+ NULL, NULL);
if (cifs_sm_req_cachep == NULL) {
mempool_destroy(cifs_req_poolp);
kmem_cache_destroy(cifs_req_cachep);
do {
if (try_to_freeze())
continue;
- set_current_state(TASK_INTERRUPTIBLE);
- schedule_timeout(1*HZ);
spin_lock(&GlobalMid_Lock);
if(list_empty(&GlobalOplock_Q)) {
spin_unlock(&GlobalMid_Lock);
DeleteOplockQEntry(oplock_item);
/* can not grab inode sem here since it would
deadlock when oplock received on delete
- since vfs_unlink holds the i_sem across
+ since vfs_unlink holds the i_mutex across
the call */
- /* down(&inode->i_sem);*/
+ /* mutex_lock(&inode->i_mutex);*/
if (S_ISREG(inode->i_mode)) {
rc = filemap_fdatawrite(inode->i_mapping);
if(CIFS_I(inode)->clientCanCacheRead == 0) {
}
} else
rc = 0;
- /* up(&inode->i_sem);*/
+ /* mutex_unlock(&inode->i_mutex);*/
if (rc)
CIFS_I(inode)->write_behind_rc = rc;
cFYI(1,("Oplock flush inode %p rc %d",inode,rc));
}
} else
spin_unlock(&GlobalMid_Lock);
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(1); /* yield in case q were corrupt */
}
} while(!signal_pending(current));
- complete_and_exit (&cifs_oplock_exited, 0);
oplockThread = NULL;
+ complete_and_exit (&cifs_oplock_exited, 0);
+}
+
+static int cifs_dnotify_thread(void * dummyarg)
+{
+ struct list_head *tmp;
+ struct cifsSesInfo *ses;
+
+ daemonize("cifsdnotifyd");
+ allow_signal(SIGTERM);
+
+ dnotifyThread = current;
+ do {
+ if(try_to_freeze())
+ continue;
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(15*HZ);
+ read_lock(&GlobalSMBSeslock);
+ /* check if any stuck requests that need
+ to be woken up and wakeq so the
+ thread can wake up and error out */
+ list_for_each(tmp, &GlobalSMBSessionList) {
+ ses = list_entry(tmp, struct cifsSesInfo,
+ cifsSessionList);
+ if(ses && ses->server &&
+ atomic_read(&ses->server->inFlight))
+ wake_up_all(&ses->server->response_q);
+ }
+ read_unlock(&GlobalSMBSeslock);
+ } while(!signal_pending(current));
+ complete_and_exit (&cifs_dnotify_exited, 0);
}
static int __init
INIT_LIST_HEAD(&GlobalSMBSessionList);
INIT_LIST_HEAD(&GlobalTreeConnectionList);
INIT_LIST_HEAD(&GlobalOplock_Q);
+#ifdef CONFIG_CIFS_EXPERIMENTAL
+ INIT_LIST_HEAD(&GlobalDnotifyReqList);
+ INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
+#endif
/*
* Initialize Global counters
*/
atomic_set(&tconInfoReconnectCount, 0);
atomic_set(&bufAllocCount, 0);
+ atomic_set(&smBufAllocCount, 0);
+#ifdef CONFIG_CIFS_STATS2
+ atomic_set(&totBufAllocCount, 0);
+ atomic_set(&totSmBufAllocCount, 0);
+#endif /* CONFIG_CIFS_STATS2 */
+
atomic_set(&midCount, 0);
GlobalCurrentXid = 0;
GlobalTotalActiveXid = 0;
if (!rc) {
rc = (int)kernel_thread(cifs_oplock_thread, NULL,
CLONE_FS | CLONE_FILES | CLONE_VM);
- if(rc > 0)
- return 0;
- else
+ if(rc > 0) {
+ rc = (int)kernel_thread(cifs_dnotify_thread, NULL,
+ CLONE_FS | CLONE_FILES | CLONE_VM);
+ if(rc > 0)
+ return 0;
+ else
+ cERROR(1,("error %d create dnotify thread", rc));
+ } else {
cERROR(1,("error %d create oplock thread",rc));
+ }
}
cifs_destroy_request_bufs();
}
send_sig(SIGTERM, oplockThread, 1);
wait_for_completion(&cifs_oplock_exited);
}
+ if(dnotifyThread) {
+ send_sig(SIGTERM, dnotifyThread, 1);
+ wait_for_completion(&cifs_dnotify_exited);
+ }
}
MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
git.samba.org / sfrench / cifs-2.6.git / blobdiff