INIT_LIST_HEAD(&private_data->llist);
private_data->pfile = file; /* needed for writepage */
private_data->pInode = inode;
- private_data->invalidHandle = FALSE;
- private_data->closePend = FALSE;
+ private_data->invalidHandle = false;
+ private_data->closePend = false;
/* we have to track num writers to the inode, since writepages
does not tell us which handle the write is for so there can
be a close (overlapping with write) of the filehandle that
return (GENERIC_READ | GENERIC_WRITE);
}
- return 0x20197;
+ return (READ_CONTROL | FILE_WRITE_ATTRIBUTES | FILE_READ_ATTRIBUTES |
+ FILE_WRITE_EA | FILE_APPEND_DATA | FILE_WRITE_DATA |
+ FILE_READ_DATA);
+
+
}
static inline int cifs_get_disposition(unsigned int flags)
/* want handles we can use to read with first
in the list so we do not have to walk the
- list to search for one in prepare_write */
+ list to search for one in write_begin */
if ((file->f_flags & O_ACCMODE) == O_WRONLY) {
list_add_tail(&pCifsFile->flist,
&pCifsInode->openFileList);
full_path, inode->i_sb, xid);
else
rc = cifs_get_inode_info(&file->f_path.dentry->d_inode,
- full_path, buf, inode->i_sb, xid);
+ full_path, buf, inode->i_sb, xid, NULL);
if ((*oplock & 0xF) == OPLOCK_EXCLUSIVE) {
- pCifsInode->clientCanCacheAll = TRUE;
- pCifsInode->clientCanCacheRead = TRUE;
+ pCifsInode->clientCanCacheAll = true;
+ pCifsInode->clientCanCacheRead = true;
cFYI(1, ("Exclusive Oplock granted on inode %p",
file->f_path.dentry->d_inode));
} else if ((*oplock & 0xF) == OPLOCK_READ)
- pCifsInode->clientCanCacheRead = TRUE;
+ pCifsInode->clientCanCacheRead = true;
return rc;
}
if (oplockEnabled)
oplock = REQ_OPLOCK;
else
- oplock = FALSE;
+ oplock = 0;
/* BB pass O_SYNC flag through on file attributes .. BB */
/* time to set mode which we can not set earlier due to
problems creating new read-only files */
if (pTcon->unix_ext) {
- CIFSSMBUnixSetPerms(xid, pTcon, full_path,
- inode->i_mode,
- (__u64)-1, (__u64)-1, 0 /* dev */,
+ struct cifs_unix_set_info_args args = {
+ .mode = inode->i_mode,
+ .uid = NO_CHANGE_64,
+ .gid = NO_CHANGE_64,
+ .ctime = NO_CHANGE_64,
+ .atime = NO_CHANGE_64,
+ .mtime = NO_CHANGE_64,
+ .device = 0,
+ };
+ CIFSSMBUnixSetInfo(xid, pTcon, full_path, &args,
cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
- } else {
- /* BB implement via Windows security descriptors eg
- CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
- -1, -1, local_nls);
- in the meantime could set r/o dos attribute when
- perms are eg: mode & 0222 == 0 */
}
}
return rc;
}
-static int cifs_reopen_file(struct file *file, int can_flush)
+static int cifs_reopen_file(struct file *file, bool can_flush)
{
int rc = -EACCES;
int xid, oplock;
int disposition = FILE_OPEN;
__u16 netfid;
- if (file->private_data) {
+ if (file->private_data)
pCifsFile = (struct cifsFileInfo *)file->private_data;
- } else
+ else
return -EBADF;
xid = GetXid();
down(&pCifsFile->fh_sem);
- if (pCifsFile->invalidHandle == FALSE) {
+ if (!pCifsFile->invalidHandle) {
up(&pCifsFile->fh_sem);
FreeXid(xid);
return 0;
if (oplockEnabled)
oplock = REQ_OPLOCK;
else
- oplock = FALSE;
+ oplock = 0;
/* Can not refresh inode by passing in file_info buf to be returned
by SMBOpen and then calling get_inode_info with returned buf
cFYI(1, ("oplock: %d", oplock));
} else {
pCifsFile->netfid = netfid;
- pCifsFile->invalidHandle = FALSE;
+ pCifsFile->invalidHandle = false;
up(&pCifsFile->fh_sem);
pCifsInode = CIFS_I(inode);
if (pCifsInode) {
CIFS_I(inode)->write_behind_rc = rc;
/* temporarily disable caching while we
go to server to get inode info */
- pCifsInode->clientCanCacheAll = FALSE;
- pCifsInode->clientCanCacheRead = FALSE;
+ pCifsInode->clientCanCacheAll = false;
+ pCifsInode->clientCanCacheRead = false;
if (pTcon->unix_ext)
rc = cifs_get_inode_info_unix(&inode,
full_path, inode->i_sb, xid);
else
rc = cifs_get_inode_info(&inode,
full_path, NULL, inode->i_sb,
- xid);
+ xid, NULL);
} /* else we are writing out data to server already
and could deadlock if we tried to flush data, and
since we do not know if we have data that would
we can not go to the server to get the new inod
info */
if ((oplock & 0xF) == OPLOCK_EXCLUSIVE) {
- pCifsInode->clientCanCacheAll = TRUE;
- pCifsInode->clientCanCacheRead = TRUE;
+ pCifsInode->clientCanCacheAll = true;
+ pCifsInode->clientCanCacheRead = true;
cFYI(1, ("Exclusive Oplock granted on inode %p",
file->f_path.dentry->d_inode));
} else if ((oplock & 0xF) == OPLOCK_READ) {
- pCifsInode->clientCanCacheRead = TRUE;
- pCifsInode->clientCanCacheAll = FALSE;
+ pCifsInode->clientCanCacheRead = true;
+ pCifsInode->clientCanCacheAll = false;
} else {
- pCifsInode->clientCanCacheRead = FALSE;
- pCifsInode->clientCanCacheAll = FALSE;
+ pCifsInode->clientCanCacheRead = false;
+ pCifsInode->clientCanCacheAll = false;
}
cifs_relock_file(pCifsFile);
}
pTcon = cifs_sb->tcon;
if (pSMBFile) {
struct cifsLockInfo *li, *tmp;
-
- pSMBFile->closePend = TRUE;
+ write_lock(&GlobalSMBSeslock);
+ pSMBFile->closePend = true;
if (pTcon) {
/* no sense reconnecting to close a file that is
already closed */
- if (pTcon->tidStatus != CifsNeedReconnect) {
+ if (!pTcon->need_reconnect) {
+ write_unlock(&GlobalSMBSeslock);
timeout = 2;
while ((atomic_read(&pSMBFile->wrtPending) != 0)
&& (timeout <= 2048)) {
the struct would be in each open file,
but this should give enough time to
clear the socket */
-#ifdef CONFIG_CIFS_DEBUG2
- cFYI(1, ("close delay, write pending"));
-#endif /* DEBUG2 */
+ cFYI(DBG2,
+ ("close delay, write pending"));
msleep(timeout);
timeout *= 4;
}
if (atomic_read(&pSMBFile->wrtPending))
- cERROR(1,
- ("close with pending writes"));
- rc = CIFSSMBClose(xid, pTcon,
+ cERROR(1, ("close with pending write"));
+ if (!pTcon->need_reconnect &&
+ !pSMBFile->invalidHandle)
+ rc = CIFSSMBClose(xid, pTcon,
pSMBFile->netfid);
- }
- }
+ } else
+ write_unlock(&GlobalSMBSeslock);
+ } else
+ write_unlock(&GlobalSMBSeslock);
/* Delete any outstanding lock records.
We'll lose them when the file is closed anyway. */
msleep(timeout);
timeout *= 8;
}
- kfree(pSMBFile->search_resume_name);
kfree(file->private_data);
file->private_data = NULL;
} else
cFYI(1, ("closing last open instance for inode %p", inode));
/* if the file is not open we do not know if we can cache info
on this inode, much less write behind and read ahead */
- CIFS_I(inode)->clientCanCacheRead = FALSE;
- CIFS_I(inode)->clientCanCacheAll = FALSE;
+ CIFS_I(inode)->clientCanCacheRead = false;
+ CIFS_I(inode)->clientCanCacheAll = false;
}
read_unlock(&GlobalSMBSeslock);
if ((rc == 0) && CIFS_I(inode)->write_behind_rc)
pTcon = cifs_sb->tcon;
cFYI(1, ("Freeing private data in close dir"));
- if ((pCFileStruct->srch_inf.endOfSearch == FALSE) &&
- (pCFileStruct->invalidHandle == FALSE)) {
- pCFileStruct->invalidHandle = TRUE;
+ write_lock(&GlobalSMBSeslock);
+ if (!pCFileStruct->srch_inf.endOfSearch &&
+ !pCFileStruct->invalidHandle) {
+ pCFileStruct->invalidHandle = true;
+ write_unlock(&GlobalSMBSeslock);
rc = CIFSFindClose(xid, pTcon, pCFileStruct->netfid);
cFYI(1, ("Closing uncompleted readdir with rc %d",
rc));
/* not much we can do if it fails anyway, ignore rc */
rc = 0;
- }
+ } else
+ write_unlock(&GlobalSMBSeslock);
ptmp = pCFileStruct->srch_inf.ntwrk_buf_start;
if (ptmp) {
cFYI(1, ("closedir free smb buf in srch struct"));
else
cifs_buf_release(ptmp);
}
- ptmp = pCFileStruct->search_resume_name;
- if (ptmp) {
- cFYI(1, ("closedir free resume name"));
- pCFileStruct->search_resume_name = NULL;
- kfree(ptmp);
- }
kfree(file->private_data);
file->private_data = NULL;
}
__u32 numLock = 0;
__u32 numUnlock = 0;
__u64 length;
- int wait_flag = FALSE;
+ bool wait_flag = false;
struct cifs_sb_info *cifs_sb;
struct cifsTconInfo *pTcon;
__u16 netfid;
__u8 lockType = LOCKING_ANDX_LARGE_FILES;
- int posix_locking;
+ bool posix_locking;
length = 1 + pfLock->fl_end - pfLock->fl_start;
rc = -EACCES;
cFYI(1, ("Flock"));
if (pfLock->fl_flags & FL_SLEEP) {
cFYI(1, ("Blocking lock"));
- wait_flag = TRUE;
+ wait_flag = true;
}
if (pfLock->fl_flags & FL_ACCESS)
cFYI(1, ("Process suspended by mandatory locking - "
stored_rc = CIFSSMBLock(xid, pTcon,
netfid,
li->length, li->offset,
- 1, 0, li->type, FALSE);
+ 1, 0, li->type, false);
if (stored_rc)
rc = stored_rc;
return -EBADF;
open_file = (struct cifsFileInfo *) file->private_data;
+ rc = generic_write_checks(file, poffset, &write_size, 0);
+ if (rc)
+ return rc;
+
xid = GetXid();
if (*poffset > file->f_path.dentry->d_inode->i_size)
filemap_fdatawait from here so tell
reopen_file not to flush data to server
now */
- rc = cifs_reopen_file(file, FALSE);
+ rc = cifs_reopen_file(file, false);
if (rc != 0)
break;
}
}
static ssize_t cifs_write(struct file *file, const char *write_data,
- size_t write_size, loff_t *poffset)
+ size_t write_size, loff_t *poffset)
{
int rc = 0;
unsigned int bytes_written = 0;
filemap_fdatawait from here so tell
reopen_file not to flush data to
server now */
- rc = cifs_reopen_file(file, FALSE);
+ rc = cifs_reopen_file(file, false);
if (rc != 0)
break;
}
struct cifsFileInfo *find_writable_file(struct cifsInodeInfo *cifs_inode)
{
struct cifsFileInfo *open_file;
+ bool any_available = false;
int rc;
/* Having a null inode here (because mapping->host was set to zero by
read_lock(&GlobalSMBSeslock);
refind_writable:
list_for_each_entry(open_file, &cifs_inode->openFileList, flist) {
- if (open_file->closePend)
+ if (open_file->closePend ||
+ (!any_available && open_file->pid != current->tgid))
continue;
+
if (open_file->pfile &&
((open_file->pfile->f_flags & O_RDWR) ||
(open_file->pfile->f_flags & O_WRONLY))) {
read_unlock(&GlobalSMBSeslock);
/* Had to unlock since following call can block */
- rc = cifs_reopen_file(open_file->pfile, FALSE);
+ rc = cifs_reopen_file(open_file->pfile, false);
if (!rc) {
if (!open_file->closePend)
return open_file;
of the loop here. */
}
}
+ /* couldn't find useable FH with same pid, try any available */
+ if (!any_available) {
+ any_available = true;
+ goto refind_writable;
+ }
read_unlock(&GlobalSMBSeslock);
return NULL;
}
if (first < 0)
lock_page(page);
- else if (TestSetPageLocked(page))
+ else if (!trylock_page(page))
break;
if (unlikely(page->mapping != mapping)) {
if ((wbc->nr_to_write -= n_iov) <= 0)
done = 1;
index = next;
- }
+ } else
+ /* Need to re-find the pages we skipped */
+ index = pvec.pages[0]->index + 1;
+
pagevec_release(&pvec);
}
if (!scanned && !done) {
xid = GetXid();
/* BB add check for wbc flags */
page_cache_get(page);
- if (!PageUptodate(page)) {
+ if (!PageUptodate(page))
cFYI(1, ("ppw - page not up to date"));
- }
/*
* Set the "writeback" flag, and clear "dirty" in the radix tree.
return rc;
}
-static int cifs_commit_write(struct file *file, struct page *page,
- unsigned offset, unsigned to)
+static int cifs_write_end(struct file *file, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned copied,
+ struct page *page, void *fsdata)
{
- int xid;
- int rc = 0;
- struct inode *inode = page->mapping->host;
- loff_t position = ((loff_t)page->index << PAGE_CACHE_SHIFT) + to;
- char *page_data;
+ int rc;
+ struct inode *inode = mapping->host;
+
+ cFYI(1, ("write_end for page %p from pos %lld with %d bytes",
+ page, pos, copied));
+
+ if (!PageUptodate(page) && copied == PAGE_CACHE_SIZE)
+ SetPageUptodate(page);
- xid = GetXid();
- cFYI(1, ("commit write for page %p up to position %lld for %d",
- page, position, to));
- spin_lock(&inode->i_lock);
- if (position > inode->i_size) {
- i_size_write(inode, position);
- }
- spin_unlock(&inode->i_lock);
if (!PageUptodate(page)) {
- position = ((loff_t)page->index << PAGE_CACHE_SHIFT) + offset;
- /* can not rely on (or let) writepage write this data */
- if (to < offset) {
- cFYI(1, ("Illegal offsets, can not copy from %d to %d",
- offset, to));
- FreeXid(xid);
- return rc;
- }
+ char *page_data;
+ unsigned offset = pos & (PAGE_CACHE_SIZE - 1);
+ int xid;
+
+ xid = GetXid();
/* this is probably better than directly calling
partialpage_write since in this function the file handle is
known which we might as well leverage */
/* BB check if anything else missing out of ppw
such as updating last write time */
page_data = kmap(page);
- rc = cifs_write(file, page_data + offset, to-offset,
- &position);
- if (rc > 0)
- rc = 0;
- /* else if (rc < 0) should we set writebehind rc? */
+ rc = cifs_write(file, page_data + offset, copied, &pos);
+ /* if (rc < 0) should we set writebehind rc? */
kunmap(page);
+
+ FreeXid(xid);
} else {
+ rc = copied;
+ pos += copied;
set_page_dirty(page);
}
- FreeXid(xid);
+ if (rc > 0) {
+ spin_lock(&inode->i_lock);
+ if (pos > inode->i_size)
+ i_size_write(inode, pos);
+ spin_unlock(&inode->i_lock);
+ }
+
+ unlock_page(page);
+ page_cache_release(page);
+
return rc;
}
}
open_file = (struct cifsFileInfo *)file->private_data;
- if ((file->f_flags & O_ACCMODE) == O_WRONLY) {
+ if ((file->f_flags & O_ACCMODE) == O_WRONLY)
cFYI(1, ("attempting read on write only file instance"));
- }
+
for (total_read = 0, current_offset = read_data;
read_size > total_read;
total_read += bytes_read, current_offset += bytes_read) {
int buf_type = CIFS_NO_BUFFER;
if ((open_file->invalidHandle) &&
(!open_file->closePend)) {
- rc = cifs_reopen_file(file, TRUE);
+ rc = cifs_reopen_file(file, true);
if (rc != 0)
break;
}
smb_read_data +
4 /* RFC1001 length field */ +
le16_to_cpu(pSMBr->DataOffset),
- bytes_read)) {
+ bytes_read))
rc = -EFAULT;
- }
if (buf_type == CIFS_SMALL_BUFFER)
cifs_small_buf_release(smb_read_data);
while (rc == -EAGAIN) {
if ((open_file->invalidHandle) &&
(!open_file->closePend)) {
- rc = cifs_reopen_file(file, TRUE);
+ rc = cifs_reopen_file(file, true);
if (rc != 0)
break;
}
SetPageUptodate(page);
unlock_page(page);
if (!pagevec_add(plru_pvec, page))
- __pagevec_lru_add(plru_pvec);
+ __pagevec_lru_add_file(plru_pvec);
data += PAGE_CACHE_SIZE;
}
return;
pTcon = cifs_sb->tcon;
pagevec_init(&lru_pvec, 0);
-#ifdef CONFIG_CIFS_DEBUG2
- cFYI(1, ("rpages: num pages %d", num_pages));
-#endif
+ cFYI(DBG2, ("rpages: num pages %d", num_pages));
for (i = 0; i < num_pages; ) {
unsigned contig_pages;
struct page *tmp_page;
/* Read size needs to be in multiples of one page */
read_size = min_t(const unsigned int, read_size,
cifs_sb->rsize & PAGE_CACHE_MASK);
-#ifdef CONFIG_CIFS_DEBUG2
- cFYI(1, ("rpages: read size 0x%x contiguous pages %d",
+ cFYI(DBG2, ("rpages: read size 0x%x contiguous pages %d",
read_size, contig_pages));
-#endif
rc = -EAGAIN;
while (rc == -EAGAIN) {
if ((open_file->invalidHandle) &&
(!open_file->closePend)) {
- rc = cifs_reopen_file(file, TRUE);
+ rc = cifs_reopen_file(file, true);
if (rc != 0)
break;
}
bytes_read = 0;
}
- pagevec_lru_add(&lru_pvec);
+ pagevec_lru_add_file(&lru_pvec);
/* need to free smb_read_data buf before exit */
if (smb_read_data) {
refreshing the inode only on increases in the file size
but this is tricky to do without racing with writebehind
page caching in the current Linux kernel design */
-int is_size_safe_to_change(struct cifsInodeInfo *cifsInode, __u64 end_of_file)
+bool is_size_safe_to_change(struct cifsInodeInfo *cifsInode, __u64 end_of_file)
{
if (!cifsInode)
- return 1;
+ return true;
if (is_inode_writable(cifsInode)) {
/* This inode is open for write at least once */
struct cifs_sb_info *cifs_sb;
cifs_sb = CIFS_SB(cifsInode->vfs_inode.i_sb);
- if ( cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO ) {
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
/* since no page cache to corrupt on directio
we can change size safely */
- return 1;
+ return true;
}
if (i_size_read(&cifsInode->vfs_inode) < end_of_file)
- return 1;
+ return true;
- return 0;
+ return false;
} else
- return 1;
+ return true;
}
-static int cifs_prepare_write(struct file *file, struct page *page,
- unsigned from, unsigned to)
+static int cifs_write_begin(struct file *file, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned flags,
+ struct page **pagep, void **fsdata)
{
- int rc = 0;
- loff_t i_size;
- loff_t offset;
+ pgoff_t index = pos >> PAGE_CACHE_SHIFT;
+ loff_t offset = pos & (PAGE_CACHE_SIZE - 1);
- cFYI(1, ("prepare write for page %p from %d to %d", page, from, to));
- if (PageUptodate(page))
+ cFYI(1, ("write_begin from %lld len %d", (long long)pos, len));
+
+ *pagep = __grab_cache_page(mapping, index);
+ if (!*pagep)
+ return -ENOMEM;
+
+ if (PageUptodate(*pagep))
return 0;
/* If we are writing a full page it will be up to date,
no need to read from the server */
- if ((to == PAGE_CACHE_SIZE) && (from == 0)) {
- SetPageUptodate(page);
+ if (len == PAGE_CACHE_SIZE && flags & AOP_FLAG_UNINTERRUPTIBLE)
return 0;
- }
- offset = (loff_t)page->index << PAGE_CACHE_SHIFT;
- i_size = i_size_read(page->mapping->host);
+ if ((file->f_flags & O_ACCMODE) != O_WRONLY) {
+ int rc;
- if ((offset >= i_size) ||
- ((from == 0) && (offset + to) >= i_size)) {
- /*
- * We don't need to read data beyond the end of the file.
- * zero it, and set the page uptodate
- */
- simple_prepare_write(file, page, from, to);
- SetPageUptodate(page);
- } else if ((file->f_flags & O_ACCMODE) != O_WRONLY) {
/* might as well read a page, it is fast enough */
- rc = cifs_readpage_worker(file, page, &offset);
+ rc = cifs_readpage_worker(file, *pagep, &offset);
+
+ /* we do not need to pass errors back
+ e.g. if we do not have read access to the file
+ because cifs_write_end will attempt synchronous writes
+ -- shaggy */
} else {
/* we could try using another file handle if there is one -
but how would we lock it to prevent close of that handle
racing with this read? In any case
- this will be written out by commit_write so is fine */
+ this will be written out by write_end so is fine */
}
- /* we do not need to pass errors back
- e.g. if we do not have read access to the file
- because cifs_commit_write will do the right thing. -- shaggy */
-
return 0;
}
.readpages = cifs_readpages,
.writepage = cifs_writepage,
.writepages = cifs_writepages,
- .prepare_write = cifs_prepare_write,
- .commit_write = cifs_commit_write,
+ .write_begin = cifs_write_begin,
+ .write_end = cifs_write_end,
.set_page_dirty = __set_page_dirty_nobuffers,
/* .sync_page = cifs_sync_page, */
/* .direct_IO = */
.readpage = cifs_readpage,
.writepage = cifs_writepage,
.writepages = cifs_writepages,
- .prepare_write = cifs_prepare_write,
- .commit_write = cifs_commit_write,
+ .write_begin = cifs_write_begin,
+ .write_end = cifs_write_end,
.set_page_dirty = __set_page_dirty_nobuffers,
/* .sync_page = cifs_sync_page, */
/* .direct_IO = */