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-rw-r--r--fs/smb/client/file.c111
1 files changed, 95 insertions, 16 deletions
diff --git a/fs/smb/client/file.c b/fs/smb/client/file.c
index 16aadce492b2e..9be37d0fe724e 100644
--- a/fs/smb/client/file.c
+++ b/fs/smb/client/file.c
@@ -206,12 +206,12 @@ cifs_mark_open_files_invalid(struct cifs_tcon *tcon)
*/
}
-static inline int cifs_convert_flags(unsigned int flags)
+static inline int cifs_convert_flags(unsigned int flags, int rdwr_for_fscache)
{
if ((flags & O_ACCMODE) == O_RDONLY)
return GENERIC_READ;
else if ((flags & O_ACCMODE) == O_WRONLY)
- return GENERIC_WRITE;
+ return rdwr_for_fscache == 1 ? (GENERIC_READ | GENERIC_WRITE) : GENERIC_WRITE;
else if ((flags & O_ACCMODE) == O_RDWR) {
/* GENERIC_ALL is too much permission to request
can cause unnecessary access denied on create */
@@ -348,11 +348,16 @@ static int cifs_nt_open(const char *full_path, struct inode *inode, struct cifs_
int create_options = CREATE_NOT_DIR;
struct TCP_Server_Info *server = tcon->ses->server;
struct cifs_open_parms oparms;
+ int rdwr_for_fscache = 0;
if (!server->ops->open)
return -ENOSYS;
- desired_access = cifs_convert_flags(f_flags);
+ /* If we're caching, we need to be able to fill in around partial writes. */
+ if (cifs_fscache_enabled(inode) && (f_flags & O_ACCMODE) == O_WRONLY)
+ rdwr_for_fscache = 1;
+
+ desired_access = cifs_convert_flags(f_flags, rdwr_for_fscache);
/*********************************************************************
* open flag mapping table:
@@ -389,6 +394,7 @@ static int cifs_nt_open(const char *full_path, struct inode *inode, struct cifs_
if (f_flags & O_DIRECT)
create_options |= CREATE_NO_BUFFER;
+retry_open:
oparms = (struct cifs_open_parms) {
.tcon = tcon,
.cifs_sb = cifs_sb,
@@ -400,8 +406,16 @@ static int cifs_nt_open(const char *full_path, struct inode *inode, struct cifs_
};
rc = server->ops->open(xid, &oparms, oplock, buf);
- if (rc)
+ if (rc) {
+ if (rc == -EACCES && rdwr_for_fscache == 1) {
+ desired_access = cifs_convert_flags(f_flags, 0);
+ rdwr_for_fscache = 2;
+ goto retry_open;
+ }
return rc;
+ }
+ if (rdwr_for_fscache == 2)
+ cifs_invalidate_cache(inode, FSCACHE_INVAL_DIO_WRITE);
/* TODO: Add support for calling posix query info but with passing in fid */
if (tcon->unix_ext)
@@ -445,6 +459,7 @@ cifs_down_write(struct rw_semaphore *sem)
}
static void cifsFileInfo_put_work(struct work_struct *work);
+void serverclose_work(struct work_struct *work);
struct cifsFileInfo *cifs_new_fileinfo(struct cifs_fid *fid, struct file *file,
struct tcon_link *tlink, __u32 oplock,
@@ -491,6 +506,7 @@ struct cifsFileInfo *cifs_new_fileinfo(struct cifs_fid *fid, struct file *file,
cfile->tlink = cifs_get_tlink(tlink);
INIT_WORK(&cfile->oplock_break, cifs_oplock_break);
INIT_WORK(&cfile->put, cifsFileInfo_put_work);
+ INIT_WORK(&cfile->serverclose, serverclose_work);
INIT_DELAYED_WORK(&cfile->deferred, smb2_deferred_work_close);
mutex_init(&cfile->fh_mutex);
spin_lock_init(&cfile->file_info_lock);
@@ -582,6 +598,40 @@ static void cifsFileInfo_put_work(struct work_struct *work)
cifsFileInfo_put_final(cifs_file);
}
+void serverclose_work(struct work_struct *work)
+{
+ struct cifsFileInfo *cifs_file = container_of(work,
+ struct cifsFileInfo, serverclose);
+
+ struct cifs_tcon *tcon = tlink_tcon(cifs_file->tlink);
+
+ struct TCP_Server_Info *server = tcon->ses->server;
+ int rc = 0;
+ int retries = 0;
+ int MAX_RETRIES = 4;
+
+ do {
+ if (server->ops->close_getattr)
+ rc = server->ops->close_getattr(0, tcon, cifs_file);
+ else if (server->ops->close)
+ rc = server->ops->close(0, tcon, &cifs_file->fid);
+
+ if (rc == -EBUSY || rc == -EAGAIN) {
+ retries++;
+ msleep(250);
+ }
+ } while ((rc == -EBUSY || rc == -EAGAIN) && (retries < MAX_RETRIES)
+ );
+
+ if (retries == MAX_RETRIES)
+ pr_warn("Serverclose failed %d times, giving up\n", MAX_RETRIES);
+
+ if (cifs_file->offload)
+ queue_work(fileinfo_put_wq, &cifs_file->put);
+ else
+ cifsFileInfo_put_final(cifs_file);
+}
+
/**
* cifsFileInfo_put - release a reference of file priv data
*
@@ -622,10 +672,13 @@ void _cifsFileInfo_put(struct cifsFileInfo *cifs_file,
struct cifs_fid fid = {};
struct cifs_pending_open open;
bool oplock_break_cancelled;
+ bool serverclose_offloaded = false;
spin_lock(&tcon->open_file_lock);
spin_lock(&cifsi->open_file_lock);
spin_lock(&cifs_file->file_info_lock);
+
+ cifs_file->offload = offload;
if (--cifs_file->count > 0) {
spin_unlock(&cifs_file->file_info_lock);
spin_unlock(&cifsi->open_file_lock);
@@ -667,13 +720,20 @@ void _cifsFileInfo_put(struct cifsFileInfo *cifs_file,
if (!tcon->need_reconnect && !cifs_file->invalidHandle) {
struct TCP_Server_Info *server = tcon->ses->server;
unsigned int xid;
+ int rc = 0;
xid = get_xid();
if (server->ops->close_getattr)
- server->ops->close_getattr(xid, tcon, cifs_file);
+ rc = server->ops->close_getattr(xid, tcon, cifs_file);
else if (server->ops->close)
- server->ops->close(xid, tcon, &cifs_file->fid);
+ rc = server->ops->close(xid, tcon, &cifs_file->fid);
_free_xid(xid);
+
+ if (rc == -EBUSY || rc == -EAGAIN) {
+ // Server close failed, hence offloading it as an async op
+ queue_work(serverclose_wq, &cifs_file->serverclose);
+ serverclose_offloaded = true;
+ }
}
if (oplock_break_cancelled)
@@ -681,10 +741,15 @@ void _cifsFileInfo_put(struct cifsFileInfo *cifs_file,
cifs_del_pending_open(&open);
- if (offload)
- queue_work(fileinfo_put_wq, &cifs_file->put);
- else
- cifsFileInfo_put_final(cifs_file);
+ // if serverclose has been offloaded to wq (on failure), it will
+ // handle offloading put as well. If serverclose not offloaded,
+ // we need to handle offloading put here.
+ if (!serverclose_offloaded) {
+ if (offload)
+ queue_work(fileinfo_put_wq, &cifs_file->put);
+ else
+ cifsFileInfo_put_final(cifs_file);
+ }
}
int cifs_open(struct inode *inode, struct file *file)
@@ -834,11 +899,11 @@ int cifs_open(struct inode *inode, struct file *file)
use_cache:
fscache_use_cookie(cifs_inode_cookie(file_inode(file)),
file->f_mode & FMODE_WRITE);
- if (file->f_flags & O_DIRECT &&
- (!((file->f_flags & O_ACCMODE) != O_RDONLY) ||
- file->f_flags & O_APPEND))
- cifs_invalidate_cache(file_inode(file),
- FSCACHE_INVAL_DIO_WRITE);
+ if (!(file->f_flags & O_DIRECT))
+ goto out;
+ if ((file->f_flags & (O_ACCMODE | O_APPEND)) == O_RDONLY)
+ goto out;
+ cifs_invalidate_cache(file_inode(file), FSCACHE_INVAL_DIO_WRITE);
out:
free_dentry_path(page);
@@ -903,6 +968,7 @@ cifs_reopen_file(struct cifsFileInfo *cfile, bool can_flush)
int disposition = FILE_OPEN;
int create_options = CREATE_NOT_DIR;
struct cifs_open_parms oparms;
+ int rdwr_for_fscache = 0;
xid = get_xid();
mutex_lock(&cfile->fh_mutex);
@@ -966,7 +1032,11 @@ cifs_reopen_file(struct cifsFileInfo *cfile, bool can_flush)
}
#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
- desired_access = cifs_convert_flags(cfile->f_flags);
+ /* If we're caching, we need to be able to fill in around partial writes. */
+ if (cifs_fscache_enabled(inode) && (cfile->f_flags & O_ACCMODE) == O_WRONLY)
+ rdwr_for_fscache = 1;
+
+ desired_access = cifs_convert_flags(cfile->f_flags, rdwr_for_fscache);
/* O_SYNC also has bit for O_DSYNC so following check picks up either */
if (cfile->f_flags & O_SYNC)
@@ -978,6 +1048,7 @@ cifs_reopen_file(struct cifsFileInfo *cfile, bool can_flush)
if (server->ops->get_lease_key)
server->ops->get_lease_key(inode, &cfile->fid);
+retry_open:
oparms = (struct cifs_open_parms) {
.tcon = tcon,
.cifs_sb = cifs_sb,
@@ -1003,6 +1074,11 @@ cifs_reopen_file(struct cifsFileInfo *cfile, bool can_flush)
/* indicate that we need to relock the file */
oparms.reconnect = true;
}
+ if (rc == -EACCES && rdwr_for_fscache == 1) {
+ desired_access = cifs_convert_flags(cfile->f_flags, 0);
+ rdwr_for_fscache = 2;
+ goto retry_open;
+ }
if (rc) {
mutex_unlock(&cfile->fh_mutex);
@@ -1011,6 +1087,9 @@ cifs_reopen_file(struct cifsFileInfo *cfile, bool can_flush)
goto reopen_error_exit;
}
+ if (rdwr_for_fscache == 2)
+ cifs_invalidate_cache(inode, FSCACHE_INVAL_DIO_WRITE);
+
#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
reopen_success:
#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-05-19 20:21:09 +0000