From ec4e4862a92b3302c3e876c88fcf5df961b5db40 Mon Sep 17 00:00:00 2001 From: Aurelien Aptel Date: Mon, 12 Apr 2021 18:01:43 +0200 Subject: [PATCH] cifs: remove old dead code While reviewing a patch clarifying locks and locking hierarchy I realized some locks were unused. This commit removes old data and code that isn't actually used anywhere, or hidden in ifdefs which cannot be enabled from the kernel config. * The uid/gid trees and associated locks are left-overs from when uid/sid mapping had an extra caching layer on top of the keyring and are now unused. See commit faa65f07d21e ("cifs: simplify id_to_sid and sid_to_id mapping code") from 2012. * cifs_oplock_break_ops is a left-over from when slow_work was remplaced by regular workqueue and is now unused. See commit 9b646972467f ("cifs: use workqueue instead of slow-work") from 2010. * CIFSSMBSetAttrLegacy is SMB1 cruft dealing with some legacy NT4/Win9x behaviour. * Remove CONFIG_CIFS_DNOTIFY_EXPERIMENTAL left-overs. This was already partially removed in 392e1c5dc9cc ("cifs: rename and clarify CIFS_ASYNC_OP and CIFS_NO_RESP") from 2019. Kill it completely. * Another candidate that was considered but spared is CONFIG_CIFS_NFSD_EXPORT which has an empty implementation and cannot be enabled by a config option (although it is listed but disabled with "BROKEN" as a dep). It's unclear whether this could even function today in its current form but it has it's own .c file and Kconfig entry which is a bit more involved to remove and might make a come back? Signed-off-by: Aurelien Aptel Signed-off-by: Steve French --- fs/cifs/cifsfs.c | 4 ---- fs/cifs/cifsglob.h | 17 --------------- fs/cifs/cifsproto.h | 11 ---------- fs/cifs/cifssmb.c | 50 --------------------------------------------- fs/cifs/inode.c | 9 -------- 5 files changed, 91 deletions(-) diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index 1b65ff9e9189..8dc2306c9092 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -1526,10 +1526,6 @@ init_cifs(void) int rc = 0; cifs_proc_init(); INIT_LIST_HEAD(&cifs_tcp_ses_list); -#ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */ - INIT_LIST_HEAD(&GlobalDnotifyReqList); - INIT_LIST_HEAD(&GlobalDnotifyRsp_Q); -#endif /* was needed for dnotify, and will be needed for inotify when VFS fix */ /* * Initialize Global counters */ diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index 298a185e6516..18a5505a506c 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -1824,13 +1824,6 @@ GLOBAL_EXTERN struct list_head cifs_tcp_ses_list; */ GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock; -#ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */ -/* Outstanding dir notify requests */ -GLOBAL_EXTERN struct list_head GlobalDnotifyReqList; -/* DirNotify response queue */ -GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q; -#endif /* was needed for dnotify, and will be needed for inotify when VFS fix */ - /* * Global transaction id (XID) information */ @@ -1874,19 +1867,9 @@ extern unsigned int cifs_min_small; /* min size of small buf pool */ extern unsigned int cifs_max_pending; /* MAX requests at once to server*/ extern bool disable_legacy_dialects; /* forbid vers=1.0 and vers=2.0 mounts */ -GLOBAL_EXTERN struct rb_root uidtree; -GLOBAL_EXTERN struct rb_root gidtree; -GLOBAL_EXTERN spinlock_t siduidlock; -GLOBAL_EXTERN spinlock_t sidgidlock; -GLOBAL_EXTERN struct rb_root siduidtree; -GLOBAL_EXTERN struct rb_root sidgidtree; -GLOBAL_EXTERN spinlock_t uidsidlock; -GLOBAL_EXTERN spinlock_t gidsidlock; - void cifs_oplock_break(struct work_struct *work); void cifs_queue_oplock_break(struct cifsFileInfo *cfile); -extern const struct slow_work_ops cifs_oplock_break_ops; extern struct workqueue_struct *cifsiod_wq; extern struct workqueue_struct *decrypt_wq; extern struct workqueue_struct *fileinfo_put_wq; diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h index 75ce6f742b8d..10c84a8159d7 100644 --- a/fs/cifs/cifsproto.h +++ b/fs/cifs/cifsproto.h @@ -358,11 +358,6 @@ extern int CIFSSMBSetFileDisposition(const unsigned int xid, struct cifs_tcon *tcon, bool delete_file, __u16 fid, __u32 pid_of_opener); -#if 0 -extern int CIFSSMBSetAttrLegacy(unsigned int xid, struct cifs_tcon *tcon, - char *fileName, __u16 dos_attributes, - const struct nls_table *nls_codepage); -#endif /* possibly unneeded function */ extern int CIFSSMBSetEOF(const unsigned int xid, struct cifs_tcon *tcon, const char *file_name, __u64 size, struct cifs_sb_info *cifs_sb, bool set_allocation); @@ -504,12 +499,6 @@ extern int generate_smb311signingkey(struct cifs_ses *); extern int calc_lanman_hash(const char *password, const char *cryptkey, bool encrypt, char *lnm_session_key); #endif /* CIFS_WEAK_PW_HASH */ -#ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */ -extern int CIFSSMBNotify(const unsigned int xid, struct cifs_tcon *tcon, - const int notify_subdirs, const __u16 netfid, - __u32 filter, struct file *file, int multishot, - const struct nls_table *nls_codepage); -#endif /* was needed for dnotify, and will be needed for inotify when VFS fix */ extern int CIFSSMBCopy(unsigned int xid, struct cifs_tcon *source_tcon, const char *fromName, diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index c279527aae92..7fcc0fc4e68b 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -5917,56 +5917,6 @@ SetTimesRetry: return rc; } -/* Can not be used to set time stamps yet (due to old DOS time format) */ -/* Can be used to set attributes */ -#if 0 /* Possibly not needed - since it turns out that strangely NT4 has a bug - handling it anyway and NT4 was what we thought it would be needed for - Do not delete it until we prove whether needed for Win9x though */ -int -CIFSSMBSetAttrLegacy(unsigned int xid, struct cifs_tcon *tcon, char *fileName, - __u16 dos_attrs, const struct nls_table *nls_codepage) -{ - SETATTR_REQ *pSMB = NULL; - SETATTR_RSP *pSMBr = NULL; - int rc = 0; - int bytes_returned; - int name_len; - - cifs_dbg(FYI, "In SetAttrLegacy\n"); - -SetAttrLgcyRetry: - rc = smb_init(SMB_COM_SETATTR, 8, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { - name_len = - ConvertToUTF16((__le16 *) pSMB->fileName, fileName, - PATH_MAX, nls_codepage); - name_len++; /* trailing null */ - name_len *= 2; - } else { - name_len = copy_path_name(pSMB->fileName, fileName); - } - pSMB->attr = cpu_to_le16(dos_attrs); - pSMB->BufferFormat = 0x04; - inc_rfc1001_len(pSMB, name_len + 1); - pSMB->ByteCount = cpu_to_le16(name_len + 1); - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - if (rc) - cifs_dbg(FYI, "Error in LegacySetAttr = %d\n", rc); - - cifs_buf_release(pSMB); - - if (rc == -EAGAIN) - goto SetAttrLgcyRetry; - - return rc; -} -#endif /* temporarily unneeded SetAttr legacy function */ - static void cifs_fill_unix_set_info(FILE_UNIX_BASIC_INFO *data_offset, const struct cifs_unix_set_info_args *args) diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c index f2df4422e54a..2a73ae04b741 100644 --- a/fs/cifs/inode.c +++ b/fs/cifs/inode.c @@ -2961,12 +2961,3 @@ cifs_setattr(struct user_namespace *mnt_userns, struct dentry *direntry, /* BB: add cifs_setattr_legacy for really old servers */ return rc; } - -#if 0 -void cifs_delete_inode(struct inode *inode) -{ - cifs_dbg(FYI, "In cifs_delete_inode, inode = 0x%p\n", inode); - /* may have to add back in if and when safe distributed caching of - directories added e.g. via FindNotify */ -} -#endif -- 2.20.1