[PATCH v3 48/59] cifs: Share server EOF pos with netfslib

David Howells
2023-12-07T21:25:09Z

Use cifsi->netfs_ctx.remote_i_size instead of cifsi->server_eof so that
netfslib can refer to it to.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Steve French <sfrench@samba.org>
cc: Shyam Prasad N <nspmangalore@gmail.com>
cc: Rohith Surabattula <rohiths.msft@gmail.com>
cc: Jeff Layton <jlayton@kernel.org>
cc: linux-cifs@vger.kernel.org
cc: linux-cachefs@redhat.com
cc: linux-fsdevel@vger.kernel.org
cc: linux-mm@kvack.org
---
fs/smb/client/cifsfs.c | 17 ++++++++++++++---
fs/smb/client/cifsglob.h | 1 -
fs/smb/client/file.c | 8 ++++----
fs/smb/client/inode.c | 8 +++++---
fs/smb/client/smb2ops.c | 18 +++++++++++++-----
5 files changed, 36 insertions(+), 16 deletions(-)

diff --git a/fs/smb/client/cifsfs.c b/fs/smb/client/cifsfs.c
index 07cd88897c33..078cff36cd2e 100644
--- a/fs/smb/client/cifsfs.c
+++ b/fs/smb/client/cifsfs.c
@@ -395,7 +395,7 @@ cifs_alloc_inode(struct super_block *sb)
spin_lock_init(&cifs_inode->writers_lock);
cifs_inode->writers = 0;
cifs_inode->netfs.inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
- cifs_inode->server_eof = 0;
+ cifs_inode->netfs.remote_i_size = 0;
cifs_inode->uniqueid = 0;
cifs_inode->createtime = 0;
cifs_inode->epoch = 0;
@@ -1377,6 +1377,7 @@ ssize_t cifs_file_copychunk_range(unsigned int xid,
struct inode *src_inode = file_inode(src_file);
struct inode *target_inode = file_inode(dst_file);
struct cifsInodeInfo *src_cifsi = CIFS_I(src_inode);
+ struct cifsInodeInfo *target_cifsi = CIFS_I(target_inode);
struct cifsFileInfo *smb_file_src;
struct cifsFileInfo *smb_file_target;
struct cifs_tcon *src_tcon;
@@ -1425,7 +1426,7 @@ ssize_t cifs_file_copychunk_range(unsigned int xid,
* Advance the EOF marker after the flush above to the end of the range
* if it's short of that.
*/
- if (src_cifsi->server_eof < off + len) {
+ if (src_cifsi->netfs.remote_i_size < off + len) {
rc = cifs_precopy_set_eof(src_inode, src_cifsi, src_tcon, xid, off + len);
if (rc < 0)
goto unlock;
@@ -1449,12 +1450,22 @@ ssize_t cifs_file_copychunk_range(unsigned int xid,
/* Discard all the folios that overlap the destination region. */
truncate_inode_pages_range(&target_inode->i_data, fstart, fend);

+ fscache_invalidate(cifs_inode_cookie(target_inode), NULL,
+ i_size_read(target_inode), 0);
+
rc = file_modified(dst_file);
if (!rc) {
rc = target_tcon->ses->server->ops->copychunk_range(xid,
smb_file_src, smb_file_target, off, len, destoff);
- if (rc > 0 && destoff + rc > i_size_read(target_inode))
+ if (rc > 0 && destoff + rc > i_size_read(target_inode)) {
truncate_setsize(target_inode, destoff + rc);
+ netfs_resize_file(&target_cifsi->netfs,
+ i_size_read(target_inode), true);
+ fscache_resize_cookie(cifs_inode_cookie(target_inode),
+ i_size_read(target_inode));
+ }
+ if (rc > 0 && destoff + rc > target_cifsi->netfs.zero_point)
+ target_cifsi->netfs.zero_point = destoff + rc;
}

file_accessed(src_file);
diff --git a/fs/smb/client/cifsglob.h b/fs/smb/client/cifsglob.h
index 65820f40f7f4..ed456c6a2752 100644
--- a/fs/smb/client/cifsglob.h
+++ b/fs/smb/client/cifsglob.h
@@ -1539,7 +1539,6 @@ struct cifsInodeInfo {
spinlock_t writers_lock;
unsigned int writers; /* Number of writers on this inode */
unsigned long time; /* jiffies of last update of inode */
- u64 server_eof; /* current file size on server -- protected by i_lock */
u64 uniqueid; /* server inode number */
u64 createtime; /* creation time on server */
__u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */
diff --git a/fs/smb/client/file.c b/fs/smb/client/file.c
index ca697bda4666..1074d56573b7 100644
--- a/fs/smb/client/file.c
+++ b/fs/smb/client/file.c
@@ -2118,8 +2118,8 @@ cifs_update_eof(struct cifsInodeInfo *cifsi, loff_t offset,
{
loff_t end_of_write = offset + bytes_written;

- if (end_of_write > cifsi->server_eof)
- cifsi->server_eof = end_of_write;
+ if (end_of_write > cifsi->netfs.remote_i_size)
+ netfs_resize_file(&cifsi->netfs, end_of_write, true);
}

static ssize_t
@@ -3245,8 +3245,8 @@ cifs_uncached_writev_complete(struct work_struct *work)

spin_lock(&inode->i_lock);
cifs_update_eof(cifsi, wdata->offset, wdata->bytes);
- if (cifsi->server_eof > inode->i_size)
- i_size_write(inode, cifsi->server_eof);
+ if (cifsi->netfs.remote_i_size > inode->i_size)
+ i_size_write(inode, cifsi->netfs.remote_i_size);
spin_unlock(&inode->i_lock);

complete(&wdata->done);
diff --git a/fs/smb/client/inode.c b/fs/smb/client/inode.c
index 09c5c0f5c96e..e8afdc969226 100644
--- a/fs/smb/client/inode.c
+++ b/fs/smb/client/inode.c
@@ -104,7 +104,7 @@ cifs_revalidate_cache(struct inode *inode, struct cifs_fattr *fattr)
fattr->cf_mtime = timestamp_truncate(fattr->cf_mtime, inode);
mtime = inode_get_mtime(inode);
if (timespec64_equal(&mtime, &fattr->cf_mtime) &&
- cifs_i->server_eof == fattr->cf_eof) {
+ cifs_i->netfs.remote_i_size == fattr->cf_eof) {
cifs_dbg(FYI, "%s: inode %llu is unchanged\n",
__func__, cifs_i->uniqueid);
return;
@@ -193,7 +193,7 @@ cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr)
else
clear_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags);

- cifs_i->server_eof = fattr->cf_eof;
+ cifs_i->netfs.remote_i_size = fattr->cf_eof;
/*
* Can't safely change the file size here if the client is writing to
* it due to potential races.
@@ -2827,7 +2827,7 @@ cifs_set_file_size(struct inode *inode, struct iattr *attrs,

set_size_out:
if (rc == 0) {
- cifsInode->server_eof = attrs->ia_size;
+ netfs_resize_file(&cifsInode->netfs, attrs->ia_size, true);
cifs_setsize(inode, attrs->ia_size);
/*
* i_blocks is not related to (i_size / i_blksize), but instead
@@ -2980,6 +2980,7 @@ cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
if ((attrs->ia_valid & ATTR_SIZE) &&
attrs->ia_size != i_size_read(inode)) {
truncate_setsize(inode, attrs->ia_size);
+ netfs_resize_file(&cifsInode->netfs, attrs->ia_size, true);
fscache_resize_cookie(cifs_inode_cookie(inode), attrs->ia_size);
}

@@ -3179,6 +3180,7 @@ cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
if ((attrs->ia_valid & ATTR_SIZE) &&
attrs->ia_size != i_size_read(inode)) {
truncate_setsize(inode, attrs->ia_size);
+ netfs_resize_file(&cifsInode->netfs, attrs->ia_size, true);
fscache_resize_cookie(cifs_inode_cookie(inode), attrs->ia_size);
}

diff --git a/fs/smb/client/smb2ops.c b/fs/smb/client/smb2ops.c
index 3fa80c1420d4..ebc0f0246126 100644
--- a/fs/smb/client/smb2ops.c
+++ b/fs/smb/client/smb2ops.c
@@ -3351,6 +3351,9 @@ static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
cfile->fid.volatile_fid, cfile->pid, &eof);
if (rc >= 0) {
truncate_setsize(inode, new_size);
+ netfs_resize_file(&cifsi->netfs, new_size, true);
+ if (offset < cifsi->netfs.zero_point)
+ cifsi->netfs.zero_point = offset;
fscache_resize_cookie(cifs_inode_cookie(inode), new_size);
}
}
@@ -3574,7 +3577,7 @@ static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
cfile->fid.volatile_fid, cfile->pid, &eof);
if (rc == 0) {
- cifsi->server_eof = off + len;
+ netfs_resize_file(&cifsi->netfs, off + len, true);
cifs_setsize(inode, off + len);
cifs_truncate_page(inode->i_mapping, inode->i_size);
truncate_setsize(inode, off + len);
@@ -3666,8 +3669,9 @@ static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon,
int rc;
unsigned int xid;
struct inode *inode = file_inode(file);
- struct cifsFileInfo *cfile = file->private_data;
struct cifsInodeInfo *cifsi = CIFS_I(inode);
+ struct cifsFileInfo *cfile = file->private_data;
+ struct netfs_inode *ictx = &cifsi->netfs;
__le64 eof;
loff_t old_eof;

@@ -3688,6 +3692,7 @@ static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon,
goto out_2;

truncate_pagecache_range(inode, off, old_eof);
+ ictx->zero_point = old_eof;

rc = smb2_copychunk_range(xid, cfile, cfile, off + len,
old_eof - off - len, off);
@@ -3702,9 +3707,10 @@ static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon,

rc = 0;

- cifsi->server_eof = i_size_read(inode) - len;
- truncate_setsize(inode, cifsi->server_eof);
- fscache_resize_cookie(cifs_inode_cookie(inode), cifsi->server_eof);
+ truncate_setsize(inode, eof);
+ netfs_resize_file(&cifsi->netfs, eof, true);
+ ictx->zero_point = eof;
+ fscache_resize_cookie(cifs_inode_cookie(inode), eof);
out_2:
filemap_invalidate_unlock(inode->i_mapping);
out:
@@ -3720,6 +3726,7 @@ static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon,
unsigned int xid;
struct cifsFileInfo *cfile = file->private_data;
struct inode *inode = file_inode(file);
+ struct cifsInodeInfo *cifsi = CIFS_I(inode);
__le64 eof;
__u64 count, old_eof;

@@ -3748,6 +3755,7 @@ static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon,
goto out_2;

truncate_setsize(inode, old_eof + len);
+ netfs_resize_file(&cifsi->netfs, i_size_read(inode), true);
fscache_resize_cookie(cifs_inode_cookie(inode), i_size_read(inode));

rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len);