From 38585ccc4627a9da381af9e912b756cfceb615a5 Mon Sep 17 00:00:00 2001 From: Andreas Dilger Date: Tue, 11 Feb 2014 02:52:05 -0700 Subject: [PATCH] staging/lustre/llite: fix O_TMPFILE/O_LOV_DELAY_CREATE conflict In kernel 3.11 O_TMPFILE was introduced, but the open flag value conflicts with the O_LOV_DELAY_CREATE flag 020000000 previously used by Lustre-aware applications. O_LOV_DELAY_CREATE allows applications to defer file layout and object creation from open time (the default) until it can instead be specified by the application using an ioctl. Instead of trying to find a non-conflicting O_LOV_DELAY_CREATE flag or define a Lustre-specific flag that isn't of use to most/any other filesystems, use (O_NOCTTY|FASYNC) as the new value. These flags are not meaningful for newly-created regular files and should be OK since O_LOV_DELAY_CREATE is only meaningful for new files. I looked into using O_ACCMODE/FMODE_WRITE_IOCTL, which allows calling ioctl() on the minimally-opened fd and is close to what is needed, but that doesn't allow specifying the actual read or write mode for the file, and fcntl(F_SETFL) doesn't allow O_RDONLY/O_WRONLY/O_RDWR to be set after the file is opened. Lustre-change: http://review.whamcloud.com/8312 Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-4209 Signed-off-by: Andreas Dilger Signed-off-by: Oleg Drokin Signed-off-by: Peng Tao Cc: Al Viro Signed-off-by: Greg Kroah-Hartman --- .../lustre/include/lustre/lustre_user.h | 12 +++++------ .../lustre/lustre/include/lustre_mdc.h | 11 ++++++++++ drivers/staging/lustre/lustre/llite/file.c | 21 ++++++++++--------- drivers/staging/lustre/lustre/mdc/mdc_lib.c | 2 +- 4 files changed, 28 insertions(+), 18 deletions(-) diff --git a/drivers/staging/lustre/lustre/include/lustre/lustre_user.h b/drivers/staging/lustre/lustre/include/lustre/lustre_user.h index a74de59e2030..336360580910 100644 --- a/drivers/staging/lustre/lustre/include/lustre/lustre_user.h +++ b/drivers/staging/lustre/lustre/include/lustre/lustre_user.h @@ -265,13 +265,11 @@ struct ost_id { #define MAX_OBD_NAME 128 /* If this changes, a NEW ioctl must be added */ -/* Hopefully O_LOV_DELAY_CREATE does not conflict with standard O_xxx flags. - * Previously it was defined as 0100000000 and conflicts with FMODE_NONOTIFY - * which was added since kernel 2.6.36, so we redefine it as 020000000. - * To be compatible with old version's statically linked binary, finally we - * define it as (020000000 | 0100000000). - * */ -#define O_LOV_DELAY_CREATE 0120000000 +/* Define O_LOV_DELAY_CREATE to be a mask that is not useful for regular + * files, but are unlikely to be used in practice and are not harmful if + * used incorrectly. O_NOCTTY and FASYNC are only meaningful for character + * devices and are safe for use on new files (See LU-812, LU-4209). */ +#define O_LOV_DELAY_CREATE (O_NOCTTY | FASYNC) #define LL_FILE_IGNORE_LOCK 0x00000001 #define LL_FILE_GROUP_LOCKED 0x00000002 diff --git a/drivers/staging/lustre/lustre/include/lustre_mdc.h b/drivers/staging/lustre/lustre/include/lustre_mdc.h index c1e02702b931..468f36344a34 100644 --- a/drivers/staging/lustre/lustre/include/lustre_mdc.h +++ b/drivers/staging/lustre/lustre/include/lustre_mdc.h @@ -166,6 +166,17 @@ void it_clear_disposition(struct lookup_intent *it, int flag); void it_set_disposition(struct lookup_intent *it, int flag); int it_open_error(int phase, struct lookup_intent *it); +static inline bool cl_is_lov_delay_create(unsigned int flags) +{ + return (flags & O_LOV_DELAY_CREATE) == O_LOV_DELAY_CREATE; +} + +static inline void cl_lov_delay_create_clear(unsigned int *flags) +{ + if ((*flags & O_LOV_DELAY_CREATE) == O_LOV_DELAY_CREATE) + *flags &= ~O_LOV_DELAY_CREATE; +} + /** @} mdc */ #endif diff --git a/drivers/staging/lustre/lustre/llite/file.c b/drivers/staging/lustre/lustre/llite/file.c index 19125d5c991a..abf5f4611abc 100644 --- a/drivers/staging/lustre/lustre/llite/file.c +++ b/drivers/staging/lustre/lustre/llite/file.c @@ -671,14 +671,13 @@ restart: ll_capa_open(inode); - if (!lli->lli_has_smd) { - if (file->f_flags & O_LOV_DELAY_CREATE || - !(file->f_mode & FMODE_WRITE)) { - CDEBUG(D_INODE, "object creation was delayed\n"); - GOTO(out_och_free, rc); - } + if (!lli->lli_has_smd && + (cl_is_lov_delay_create(file->f_flags) || + (file->f_mode & FMODE_WRITE) == 0)) { + CDEBUG(D_INODE, "object creation was delayed\n"); + GOTO(out_och_free, rc); } - file->f_flags &= ~O_LOV_DELAY_CREATE; + cl_lov_delay_create_clear(&file->f_flags); GOTO(out_och_free, rc); out_och_free: @@ -1381,23 +1380,25 @@ int ll_lov_setstripe_ea_info(struct inode *inode, struct file *file, ccc_inode_lsm_put(inode, lsm); CDEBUG(D_IOCTL, "stripe already exists for ino %lu\n", inode->i_ino); - return -EEXIST; + GOTO(out, rc = -EEXIST); } ll_inode_size_lock(inode); rc = ll_intent_file_open(file, lum, lum_size, &oit); if (rc) - GOTO(out, rc); + GOTO(out_unlock, rc); rc = oit.d.lustre.it_status; if (rc < 0) GOTO(out_req_free, rc); ll_release_openhandle(file->f_dentry, &oit); - out: +out_unlock: ll_inode_size_unlock(inode); ll_intent_release(&oit); ccc_inode_lsm_put(inode, lsm); +out: + cl_lov_delay_create_clear(&file->f_flags); return rc; out_req_free: ptlrpc_req_finished((struct ptlrpc_request *) oit.d.lustre.it_data); diff --git a/drivers/staging/lustre/lustre/mdc/mdc_lib.c b/drivers/staging/lustre/lustre/mdc/mdc_lib.c index 91f6876dac3f..5b9f37141512 100644 --- a/drivers/staging/lustre/lustre/mdc/mdc_lib.c +++ b/drivers/staging/lustre/lustre/mdc/mdc_lib.c @@ -197,7 +197,7 @@ static __u64 mds_pack_open_flags(__u64 flags, __u32 mode) if (flags & FMODE_EXEC) cr_flags |= MDS_FMODE_EXEC; #endif - if (flags & O_LOV_DELAY_CREATE) + if (cl_is_lov_delay_create(flags)) cr_flags |= MDS_OPEN_DELAY_CREATE; if (flags & O_NONBLOCK) -- 2.39.5