Re: [Devel] [PATCH RH7] pfcache: hide trusted.pfcache from listxattr
Pavel Tikhomirov writes: > In SyS_listxattr -> listxattr -> ext4_listxattr -> > ext4_xattr_list_entries we choose list handler for > each ext4_xattr_entry based on e_name_index, and as > for trusted.pfcache index is EXT4_XATTR_INDEX_TRUSTED, > we chouse ext4_xattr_trusted_list which prints xattr > to the list. > > To hide our trusted.pfcache from list change e_name_index > to new EXT4_XATTR_INDEX_TRUSTED_CSUM and thus use > ext4_xattr_trusted_csum_list instead which won't put > xattr to the returned list. Why we want to hide it? > > Test: > > TEST_FILE=/vz/root/101/testfile > TEST_SHA1=`sha1sum $TEST_FILE | awk '{print $1}'` > setfattr -n trusted.pfcache -v $TEST_SHA1 $TEST_FILE > setfattr -n trusted.test -v test $TEST_FILE > getfattr -d -m trusted $TEST_FILE > > before patch it was listed: > > trusted.pfcache="da39a3ee5e6b4b0d3255bfef95601890afd80709" > trusted.test="test" > > after - not: > > trusted.test="test" > > https://jira.sw.ru/browse/PSBM-52180 > Signed-off-by: Pavel Tikhomirov > --- > fs/ext4/pfcache.c | 28 ++-- > fs/ext4/xattr.c | 1 + > fs/ext4/xattr.h | 1 + > 3 files changed, 16 insertions(+), 14 deletions(-) > > diff --git a/fs/ext4/pfcache.c b/fs/ext4/pfcache.c > index ff2300b..5fc6d9f 100644 > --- a/fs/ext4/pfcache.c > +++ b/fs/ext4/pfcache.c > @@ -441,8 +441,8 @@ int ext4_load_data_csum(struct inode *inode) > { > int ret; > > - ret = ext4_xattr_get(inode, EXT4_XATTR_INDEX_TRUSTED, > - EXT4_DATA_CSUM_NAME, EXT4_I(inode)->i_data_csum, > + ret = ext4_xattr_get(inode, EXT4_XATTR_INDEX_TRUSTED_CSUM, > + "", EXT4_I(inode)->i_data_csum, > EXT4_DATA_CSUM_SIZE); > if (ret < 0) > return ret; > @@ -482,8 +482,8 @@ static int ext4_save_data_csum(struct inode *inode, u8 > *csum) > if (ret) > return ret; > > - return ext4_xattr_set(inode, EXT4_XATTR_INDEX_TRUSTED, > - EXT4_DATA_CSUM_NAME, EXT4_I(inode)->i_data_csum, > + return ext4_xattr_set(inode, EXT4_XATTR_INDEX_TRUSTED_CSUM, > + "", EXT4_I(inode)->i_data_csum, > EXT4_DATA_CSUM_SIZE, 0); > } > > @@ -492,8 +492,8 @@ void ext4_load_dir_csum(struct inode *inode) > char value[EXT4_DIR_CSUM_VALUE_LEN]; > int ret; > > - ret = ext4_xattr_get(inode, EXT4_XATTR_INDEX_TRUSTED, > - EXT4_DATA_CSUM_NAME, value, sizeof(value)); > + ret = ext4_xattr_get(inode, EXT4_XATTR_INDEX_TRUSTED_CSUM, > + "", value, sizeof(value)); > if (ret == EXT4_DIR_CSUM_VALUE_LEN && > !strncmp(value, EXT4_DIR_CSUM_VALUE, sizeof(value))) > ext4_set_inode_state(inode, EXT4_STATE_PFCACHE_CSUM); > @@ -502,8 +502,8 @@ void ext4_load_dir_csum(struct inode *inode) > void ext4_save_dir_csum(struct inode *inode) > { > ext4_set_inode_state(inode, EXT4_STATE_PFCACHE_CSUM); > - ext4_xattr_set(inode, EXT4_XATTR_INDEX_TRUSTED, > - EXT4_DATA_CSUM_NAME, > + ext4_xattr_set(inode, EXT4_XATTR_INDEX_TRUSTED_CSUM, > + "", > EXT4_DIR_CSUM_VALUE, > EXT4_DIR_CSUM_VALUE_LEN, 0); > } > @@ -516,8 +516,8 @@ void ext4_truncate_data_csum(struct inode *inode, loff_t > pos) > > if (EXT4_I(inode)->i_data_csum_end < 0) { > WARN_ON(journal_current_handle()); > - ext4_xattr_set(inode, EXT4_XATTR_INDEX_TRUSTED, > - EXT4_DATA_CSUM_NAME, NULL, 0, 0); > + ext4_xattr_set(inode, EXT4_XATTR_INDEX_TRUSTED_CSUM, > + "", NULL, 0, 0); > ext4_close_pfcache(inode); > } > spin_lock(&inode->i_lock); > @@ -658,8 +658,8 @@ static int ext4_xattr_trusted_csum_get(struct dentry > *dentry, const char *name, > return -EPERM; > > if (S_ISDIR(inode->i_mode)) > - return ext4_xattr_get(inode, EXT4_XATTR_INDEX_TRUSTED, > - EXT4_DATA_CSUM_NAME, buffer, size); > + return ext4_xattr_get(inode, EXT4_XATTR_INDEX_TRUSTED_CSUM, > + "", buffer, size); > > if (!S_ISREG(inode->i_mode)) > return -ENODATA; > @@ -717,8 +717,8 @@ static int ext4_xattr_trusted_csum_set(struct dentry > *dentry, const char *name, > else > return -EINVAL; > > - return ext4_xattr_set(inode, EXT4_XATTR_INDEX_TRUSTED, > - EXT4_DATA_CSUM_NAME, value, size, flags); > + return ext4_xattr_set(inode, EXT4_XATTR_INDEX_TRUSTED_CSUM, > + "", value, size, flags); > } > > if (!S_ISREG(inode->i_mode)) > diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c > index 5dabf58..81b5534 100644 > --- a/fs/ext4/xattr.c > +++ b/fs/ext4/xattr.c > @@ -102,6 +102,7 @@ static const struc
[Devel] [PATCH RHEL7 COMMIT] fs: hold reference on original path
The commit is pushed to "branch-rh7-3.10.0-327.28.2.vz7.17.x-ovz" and will appear at https://src.openvz.org/scm/ovz/vzkernel.git after rh7-3.10.0-327.28.2.vz7.17.9 --> commit 0c898c51709daf78d1704b90bec1395cadeb3a51 Author: Maxim Patlasov Date: Fri Sep 23 17:32:01 2016 +0400 fs: hold reference on original path struct file holds references on its f_path.mnt and f_path.dentry by calling path_get(&f->f_path) from do_dentry_open(). Let's use the same technique for f->f_original_path. Otherwise, f_original_path.dentry can be deleted while file still references it leading to NULL-ptr-deref on f->f_original_path.dentry->d_inode. https://jira.sw.ru/browse/PSBM-52373 Signed-off-by: Maxim Patlasov Reviewed-by: Kirill Tkhai --- fs/file_table.c | 6 ++ fs/open.c | 18 +++--- 2 files changed, 21 insertions(+), 3 deletions(-) diff --git a/fs/file_table.c b/fs/file_table.c index 957c476..b8982d8 100644 --- a/fs/file_table.c +++ b/fs/file_table.c @@ -242,6 +242,8 @@ static void __fput(struct file *file) struct dentry *dentry = file->f_path.dentry; struct vfsmount *mnt = file->f_path.mnt; struct inode *inode = dentry->d_inode; + struct dentry *original_dentry = file->f_original_path.dentry; + struct vfsmount *original_mnt = file->f_original_path.mnt; might_sleep(); @@ -273,10 +275,14 @@ static void __fput(struct file *file) drop_file_write_access(file); file->f_path.dentry = NULL; file->f_path.mnt = NULL; + file->f_original_path.dentry = NULL; + file->f_original_path.mnt = NULL; file->f_inode = NULL; file_free(file); dput(dentry); mntput(mnt); + dput(original_dentry); + mntput(original_mnt); } static DEFINE_SPINLOCK(delayed_fput_lock); diff --git a/fs/open.c b/fs/open.c index 8c066b1..25dbc85 100644 --- a/fs/open.c +++ b/fs/open.c @@ -893,16 +893,28 @@ int vfs_open(const struct path *path, struct file *filp, { struct inode *inode = path->dentry->d_inode; iop_dentry_open_t dentry_open = get_dentry_open_iop(inode); + int do_cleanup = 0; + int ret; - if (!filp->f_original_path.mnt) + if (!filp->f_original_path.mnt) { filp->f_original_path = *path; + path_get(&filp->f_original_path); + do_cleanup = 1; + } if (dentry_open) - return dentry_open(path->dentry, filp, cred); + ret = dentry_open(path->dentry, filp, cred); else { filp->f_path = *path; - return do_dentry_open(filp, NULL, cred); + ret = do_dentry_open(filp, NULL, cred); } + + if (ret && do_cleanup) { + path_put(&filp->f_original_path); + filp->f_original_path.mnt = NULL; + filp->f_original_path.dentry = NULL; + } + return ret; } EXPORT_SYMBOL(vfs_open); ___ Devel mailing list Devel@openvz.org https://lists.openvz.org/mailman/listinfo/devel
Re: [Devel] [PATCH RHEL7 COMMIT] Revert "fs: use original vfsmount for touch_atime"
reapplied in rh7-3.10.0-327.28.2.vz7.17.10 -- Best regards, Konstantin Khorenko, Virtuozzo Linux Kernel Team On 09/21/2016 04:52 PM, Konstantin Khorenko wrote: The commit is pushed to "branch-rh7-3.10.0-327.28.2.vz7.17.x-ovz" and will appear at https://src.openvz.org/scm/ovz/vzkernel.git after rh7-3.10.0-327.28.2.vz7.17.8 --> commit 5ca9c58d75751a11522dd129ddeb5a894a227896 Author: Konstantin Khorenko Date: Wed Sep 21 17:51:42 2016 +0400 Revert "fs: use original vfsmount for touch_atime" Temporary revert due to panic: https://jira.sw.ru/browse/PSBM-52373 This reverts commit a427c4dfb7514de4701ad5f51e4f9442a495131c. --- fs/open.c | 3 --- include/linux/fs.h | 4 +--- 2 files changed, 1 insertion(+), 6 deletions(-) diff --git a/fs/open.c b/fs/open.c index 8c066b1..bc60c05 100644 --- a/fs/open.c +++ b/fs/open.c @@ -894,9 +894,6 @@ int vfs_open(const struct path *path, struct file *filp, struct inode *inode = path->dentry->d_inode; iop_dentry_open_t dentry_open = get_dentry_open_iop(inode); - if (!filp->f_original_path.mnt) - filp->f_original_path = *path; - if (dentry_open) return dentry_open(path->dentry, filp, cred); else { diff --git a/include/linux/fs.h b/include/linux/fs.h index ed9519f..7203dba 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -959,7 +959,6 @@ struct file { struct rcu_head fu_rcuhead; } f_u; struct path f_path; - struct path f_original_path; #define f_dentry f_path.dentry struct inode*f_inode; /* cached value */ const struct file_operations*f_op; @@ -2094,8 +2093,7 @@ extern void touch_atime(struct path *); static inline void file_accessed(struct file *file) { if (!(file->f_flags & O_NOATIME)) - touch_atime(file->f_original_path.mnt ? - &file->f_original_path : &file->f_path); + touch_atime(&file->f_path); } int sync_inode(struct inode *inode, struct writeback_control *wbc); . ___ Devel mailing list Devel@openvz.org https://lists.openvz.org/mailman/listinfo/devel
Re: [Devel] [PATCH RHEL7 COMMIT] Revert "ms/ovl: update atime on upperovl: update atime on upper"
reapplied in rh7-3.10.0-327.28.2.vz7.17.10 -- Best regards, Konstantin Khorenko, Virtuozzo Linux Kernel Team On 09/21/2016 04:54 PM, Konstantin Khorenko wrote: The commit is pushed to "branch-rh7-3.10.0-327.28.2.vz7.17.x-ovz" and will appear at https://src.openvz.org/scm/ovz/vzkernel.git after rh7-3.10.0-327.28.2.vz7.17.8 --> commit d3dc167710ea15dbbd77bb88f3d10d51e4600789 Author: Konstantin Khorenko Date: Wed Sep 21 17:53:09 2016 +0400 Revert "ms/ovl: update atime on upperovl: update atime on upper" Temporary revert due to panic: https://jira.sw.ru/browse/PSBM-52373 This reverts commit 72814686c2596add559bba25d551af93193b0287. --- fs/overlayfs/dir.c | 1 - fs/overlayfs/inode.c | 29 +++-- fs/overlayfs/overlayfs.h | 4 fs/overlayfs/super.c | 8 ++-- 4 files changed, 5 insertions(+), 37 deletions(-) diff --git a/fs/overlayfs/dir.c b/fs/overlayfs/dir.c index 881987c..5402b9b 100644 --- a/fs/overlayfs/dir.c +++ b/fs/overlayfs/dir.c @@ -966,7 +966,6 @@ const struct inode_operations_wrapper ovl_dir_inode_operations = { .getxattr = ovl_getxattr, .listxattr = ovl_listxattr, .removexattr= ovl_removexattr, - .update_time= ovl_update_time, }, .rename2= ovl_rename2, }; diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c index 77f2da4..5fe7acf 100644 --- a/fs/overlayfs/inode.c +++ b/fs/overlayfs/inode.c @@ -196,6 +196,8 @@ static int ovl_readlink(struct dentry *dentry, char __user *buf, int bufsiz) if (!realinode->i_op->readlink) return -EINVAL; + touch_atime(&realpath); + return realinode->i_op->readlink(realpath.dentry, buf, bufsiz); } @@ -381,29 +383,6 @@ struct inode *ovl_d_select_inode(struct dentry *dentry) return d_backing_inode(realpath.dentry); } -int ovl_update_time(struct inode *inode, struct timespec *ts, int flags) -{ - struct dentry *alias; - struct path upperpath; - - if (!(flags & S_ATIME)) - return 0; - - alias = d_find_any_alias(inode); - if (!alias) - return 0; - - ovl_path_upper(alias, &upperpath); - if (upperpath.dentry) { - touch_atime(&upperpath); - inode->i_atime = d_inode(upperpath.dentry)->i_atime; - } - - dput(alias); - - return 0; -} - static const struct inode_operations_wrapper ovl_file_inode_operations = { .ops = { .setattr= ovl_setattr, @@ -413,7 +392,6 @@ static const struct inode_operations_wrapper ovl_file_inode_operations = { .getxattr = ovl_getxattr, .listxattr = ovl_listxattr, .removexattr= ovl_removexattr, - .update_time= ovl_update_time, }, .dentry_open= ovl_dentry_open, }; @@ -428,7 +406,6 @@ static const struct inode_operations ovl_symlink_inode_operations = { .getxattr = ovl_getxattr, .listxattr = ovl_listxattr, .removexattr= ovl_removexattr, - .update_time= ovl_update_time, }; struct inode *ovl_new_inode(struct super_block *sb, umode_t mode, @@ -444,7 +421,7 @@ struct inode *ovl_new_inode(struct super_block *sb, umode_t mode, inode->i_ino = get_next_ino(); inode->i_mode = mode; - inode->i_flags |= S_NOCMTIME; + inode->i_flags |= S_NOATIME | S_NOCMTIME; switch (mode) { case S_IFDIR: diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h index 61ba0d5..8da9684 100644 --- a/fs/overlayfs/overlayfs.h +++ b/fs/overlayfs/overlayfs.h @@ -174,7 +174,6 @@ ssize_t ovl_getxattr(struct dentry *dentry, const char *name, ssize_t ovl_listxattr(struct dentry *dentry, char *list, size_t size); int ovl_removexattr(struct dentry *dentry, const char *name); struct inode *ovl_d_select_inode(struct dentry *dentry); -int ovl_update_time(struct inode *inode, struct timespec *ts, int flags); struct inode *ovl_new_inode(struct super_block *sb, umode_t mode, struct ovl_entry *oe); @@ -182,9 +181,6 @@ static inline void ovl_copyattr(struct inode *from, struct inode *to) { to->i_uid = from->i_uid; to->i_gid = from->i_gid; - to->i_atime = from->i_atime; - to->i_mtime = from->i_mtime; - to->i_ctime = from->i_ctime; } /* dir.c */ diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c index b46463a..2935967 100644 --- a/fs/overlayfs/super.c +++ b/fs/overlayfs/super.c @@ -533,7 +533,7 @@ out: struct file *ovl_path_open(struct path *path, int flags) { - return dentry_open(path, flags | O_NOATIME, current_cred()); + return dentry_open(path, flags, current_cred()); } static void ovl_put_super(struct super_block *sb) @@ -1013,10 +1013,6 @@ static int ovl_fill_super(struct super_block *sb, void *data, int silent) pr_err("overlayfs: failed to clone upperpath\n");
[Devel] [PATCH RHEL7 COMMIT] pfcache: hide trusted.pfcache from listxattr
The commit is pushed to "branch-rh7-3.10.0-327.28.2.vz7.17.x-ovz" and will appear at https://src.openvz.org/scm/ovz/vzkernel.git after rh7-3.10.0-327.28.2.vz7.17.9 --> commit 00ebb1860eff85759f1b43d795c328311c684b0e Author: Pavel Tikhomirov Date: Fri Sep 23 18:03:26 2016 +0400 pfcache: hide trusted.pfcache from listxattr In SyS_listxattr -> listxattr -> ext4_listxattr -> ext4_xattr_list_entries we choose list handler for each ext4_xattr_entry based on e_name_index, and as for trusted.pfcache index is EXT4_XATTR_INDEX_TRUSTED, we chouse ext4_xattr_trusted_list which always prints xattr to the list. When there is no PFCACHE_CSUM on superblock we do not allow get/set trusted.pfcache, so hide it from list too. To do so - change it's e_name_index to new EXT4_XATTR_INDEX_TRUSTED_CSUM and thus use ext4_xattr_trusted_csum_list. Check PFCACHE_CSUM in it, and if no - do not print xattr to list. Also do not allow list without global CAP_SYS_ADMIN, as we do not allow set/get without it. Test: TEST_FILE=/vz/root/101/testfile rm -f $TEST_FILE touch $TEST_FILE TEST_SHA1=`sha1sum $TEST_FILE | awk '{print $1}'` setfattr -n trusted.pfcache -v $TEST_SHA1 $TEST_FILE setfattr -n trusted.test -v test $TEST_FILE getfattr -d -m trusted $TEST_FILE trusted.pfcache="da39a3ee5e6b4b0d3255bfef95601890afd80709" trusted.test="test" mount -oremount,nopfcache_csum /vz/root/101 getfattr -d -m trusted $TEST_FILE trusted.test="test" v2: hide only if nopfcache_csum https://jira.sw.ru/browse/PSBM-52180 Signed-off-by: Pavel Tikhomirov --- fs/ext4/pfcache.c | 45 ++--- fs/ext4/xattr.c | 1 + fs/ext4/xattr.h | 1 + 3 files changed, 32 insertions(+), 15 deletions(-) diff --git a/fs/ext4/pfcache.c b/fs/ext4/pfcache.c index ff2300b..52bd886 100644 --- a/fs/ext4/pfcache.c +++ b/fs/ext4/pfcache.c @@ -441,8 +441,8 @@ int ext4_load_data_csum(struct inode *inode) { int ret; - ret = ext4_xattr_get(inode, EXT4_XATTR_INDEX_TRUSTED, - EXT4_DATA_CSUM_NAME, EXT4_I(inode)->i_data_csum, + ret = ext4_xattr_get(inode, EXT4_XATTR_INDEX_TRUSTED_CSUM, + "", EXT4_I(inode)->i_data_csum, EXT4_DATA_CSUM_SIZE); if (ret < 0) return ret; @@ -482,8 +482,8 @@ static int ext4_save_data_csum(struct inode *inode, u8 *csum) if (ret) return ret; - return ext4_xattr_set(inode, EXT4_XATTR_INDEX_TRUSTED, - EXT4_DATA_CSUM_NAME, EXT4_I(inode)->i_data_csum, + return ext4_xattr_set(inode, EXT4_XATTR_INDEX_TRUSTED_CSUM, + "", EXT4_I(inode)->i_data_csum, EXT4_DATA_CSUM_SIZE, 0); } @@ -492,8 +492,8 @@ void ext4_load_dir_csum(struct inode *inode) char value[EXT4_DIR_CSUM_VALUE_LEN]; int ret; - ret = ext4_xattr_get(inode, EXT4_XATTR_INDEX_TRUSTED, -EXT4_DATA_CSUM_NAME, value, sizeof(value)); + ret = ext4_xattr_get(inode, EXT4_XATTR_INDEX_TRUSTED_CSUM, +"", value, sizeof(value)); if (ret == EXT4_DIR_CSUM_VALUE_LEN && !strncmp(value, EXT4_DIR_CSUM_VALUE, sizeof(value))) ext4_set_inode_state(inode, EXT4_STATE_PFCACHE_CSUM); @@ -502,8 +502,8 @@ void ext4_load_dir_csum(struct inode *inode) void ext4_save_dir_csum(struct inode *inode) { ext4_set_inode_state(inode, EXT4_STATE_PFCACHE_CSUM); - ext4_xattr_set(inode, EXT4_XATTR_INDEX_TRUSTED, - EXT4_DATA_CSUM_NAME, + ext4_xattr_set(inode, EXT4_XATTR_INDEX_TRUSTED_CSUM, + "", EXT4_DIR_CSUM_VALUE, EXT4_DIR_CSUM_VALUE_LEN, 0); } @@ -516,8 +516,8 @@ void ext4_truncate_data_csum(struct inode *inode, loff_t pos) if (EXT4_I(inode)->i_data_csum_end < 0) { WARN_ON(journal_current_handle()); - ext4_xattr_set(inode, EXT4_XATTR_INDEX_TRUSTED, - EXT4_DATA_CSUM_NAME, NULL, 0, 0); + ext4_xattr_set(inode, EXT4_XATTR_INDEX_TRUSTED_CSUM, + "", NULL, 0, 0); ext4_close_pfcache(inode); } spin_lock(&inode->i_lock); @@ -658,8 +658,8 @@ static int ext4_xattr_trusted_csum_get(struct dentry *dentry, const char *name, return -EPERM; if (S_ISDIR(inode->i_mode)) - return ext4_xattr_get(inode, EXT4_XATTR_INDEX_TRUSTED, - EXT4_DATA_CSUM_NAME, buffer, size); + return ext4_xattr_get(inode, EXT4_XATTR_INDEX_TRUSTED_CSUM, + "", buffer, size); if (!S_ISREG(inode->i_mode)) return -ENODATA; @@ -717,8 +717,8 @@
[Devel] [PATCH RHEL7 COMMIT] ms/dm: remove dummy definition of 'struct dm_table' from dm-ioctl.c
The commit is pushed to "branch-rh7-3.10.0-327.28.2.vz7.17.x-ovz" and will appear at https://src.openvz.org/scm/ovz/vzkernel.git after rh7-3.10.0-327.28.2.vz7.17.9 --> commit 1347427ba3370f15348561cc4ca46c402b85c984 Author: Andrey Ryabinin Date: Fri Sep 23 18:15:12 2016 +0400 ms/dm: remove dummy definition of 'struct dm_table' from dm-ioctl.c There is no need for it. https://jira.sw.ru/browse/PSBM-50727 Signed-off-by: Andrey Ryabinin --- drivers/md/dm-ioctl.c | 8 1 file changed, 8 deletions(-) diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c index 720ceeb..0fe4233 100644 --- a/drivers/md/dm-ioctl.c +++ b/drivers/md/dm-ioctl.c @@ -36,14 +36,6 @@ struct hash_cell { struct dm_table *new_map; }; -/* - * A dummy definition to make RCU happy. - * struct dm_table should never be dereferenced in this file. - */ -struct dm_table { - int undefined__; -}; - struct vers_iter { size_t param_size; struct dm_target_versions *vers, *old_vers; ___ Devel mailing list Devel@openvz.org https://lists.openvz.org/mailman/listinfo/devel
Re: [Devel] [PATCH rh7 2/2] ms/dm: remove dummy definition of 'struct dm_table'
Why mainstream still keeps it? -- Best regards, Konstantin Khorenko, Virtuozzo Linux Kernel Team On 09/22/2016 07:44 PM, Andrey Ryabinin wrote: There is no need for it. https://jira.sw.ru/browse/PSBM-50727 Signed-off-by: Andrey Ryabinin --- drivers/md/dm-ioctl.c | 8 1 file changed, 8 deletions(-) diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c index 720ceeb..0fe4233 100644 --- a/drivers/md/dm-ioctl.c +++ b/drivers/md/dm-ioctl.c @@ -36,14 +36,6 @@ struct hash_cell { struct dm_table *new_map; }; -/* - * A dummy definition to make RCU happy. - * struct dm_table should never be dereferenced in this file. - */ -struct dm_table { - int undefined__; -}; - struct vers_iter { size_t param_size; struct dm_target_versions *vers, *old_vers; ___ Devel mailing list Devel@openvz.org https://lists.openvz.org/mailman/listinfo/devel
[Devel] [PATCH RH7 v2] pfcache: hide trusted.pfcache from listxattr
In SyS_listxattr -> listxattr -> ext4_listxattr -> ext4_xattr_list_entries we choose list handler for each ext4_xattr_entry based on e_name_index, and as for trusted.pfcache index is EXT4_XATTR_INDEX_TRUSTED, we chouse ext4_xattr_trusted_list which always prints xattr to the list. When there is no PFCACHE_CSUM on superblock we do not allow get/set trusted.pfcache, so hide it from list too. To do so - change it's e_name_index to new EXT4_XATTR_INDEX_TRUSTED_CSUM and thus use ext4_xattr_trusted_csum_list. Check PFCACHE_CSUM in it, and if no - do not print xattr to list. Also do not allow list without global CAP_SYS_ADMIN, as we do not allow set/get without it. Test: TEST_FILE=/vz/root/101/testfile rm -f $TEST_FILE touch $TEST_FILE TEST_SHA1=`sha1sum $TEST_FILE | awk '{print $1}'` setfattr -n trusted.pfcache -v $TEST_SHA1 $TEST_FILE setfattr -n trusted.test -v test $TEST_FILE getfattr -d -m trusted $TEST_FILE trusted.pfcache="da39a3ee5e6b4b0d3255bfef95601890afd80709" trusted.test="test" mount -oremount,nopfcache_csum /vz/root/101 getfattr -d -m trusted $TEST_FILE trusted.test="test" v2: hide only if nopfcache_csum https://jira.sw.ru/browse/PSBM-52180 Signed-off-by: Pavel Tikhomirov --- fs/ext4/pfcache.c | 45 ++--- fs/ext4/xattr.c | 1 + fs/ext4/xattr.h | 1 + 3 files changed, 32 insertions(+), 15 deletions(-) diff --git a/fs/ext4/pfcache.c b/fs/ext4/pfcache.c index ff2300b..52bd886 100644 --- a/fs/ext4/pfcache.c +++ b/fs/ext4/pfcache.c @@ -441,8 +441,8 @@ int ext4_load_data_csum(struct inode *inode) { int ret; - ret = ext4_xattr_get(inode, EXT4_XATTR_INDEX_TRUSTED, - EXT4_DATA_CSUM_NAME, EXT4_I(inode)->i_data_csum, + ret = ext4_xattr_get(inode, EXT4_XATTR_INDEX_TRUSTED_CSUM, + "", EXT4_I(inode)->i_data_csum, EXT4_DATA_CSUM_SIZE); if (ret < 0) return ret; @@ -482,8 +482,8 @@ static int ext4_save_data_csum(struct inode *inode, u8 *csum) if (ret) return ret; - return ext4_xattr_set(inode, EXT4_XATTR_INDEX_TRUSTED, - EXT4_DATA_CSUM_NAME, EXT4_I(inode)->i_data_csum, + return ext4_xattr_set(inode, EXT4_XATTR_INDEX_TRUSTED_CSUM, + "", EXT4_I(inode)->i_data_csum, EXT4_DATA_CSUM_SIZE, 0); } @@ -492,8 +492,8 @@ void ext4_load_dir_csum(struct inode *inode) char value[EXT4_DIR_CSUM_VALUE_LEN]; int ret; - ret = ext4_xattr_get(inode, EXT4_XATTR_INDEX_TRUSTED, -EXT4_DATA_CSUM_NAME, value, sizeof(value)); + ret = ext4_xattr_get(inode, EXT4_XATTR_INDEX_TRUSTED_CSUM, +"", value, sizeof(value)); if (ret == EXT4_DIR_CSUM_VALUE_LEN && !strncmp(value, EXT4_DIR_CSUM_VALUE, sizeof(value))) ext4_set_inode_state(inode, EXT4_STATE_PFCACHE_CSUM); @@ -502,8 +502,8 @@ void ext4_load_dir_csum(struct inode *inode) void ext4_save_dir_csum(struct inode *inode) { ext4_set_inode_state(inode, EXT4_STATE_PFCACHE_CSUM); - ext4_xattr_set(inode, EXT4_XATTR_INDEX_TRUSTED, - EXT4_DATA_CSUM_NAME, + ext4_xattr_set(inode, EXT4_XATTR_INDEX_TRUSTED_CSUM, + "", EXT4_DIR_CSUM_VALUE, EXT4_DIR_CSUM_VALUE_LEN, 0); } @@ -516,8 +516,8 @@ void ext4_truncate_data_csum(struct inode *inode, loff_t pos) if (EXT4_I(inode)->i_data_csum_end < 0) { WARN_ON(journal_current_handle()); - ext4_xattr_set(inode, EXT4_XATTR_INDEX_TRUSTED, - EXT4_DATA_CSUM_NAME, NULL, 0, 0); + ext4_xattr_set(inode, EXT4_XATTR_INDEX_TRUSTED_CSUM, + "", NULL, 0, 0); ext4_close_pfcache(inode); } spin_lock(&inode->i_lock); @@ -658,8 +658,8 @@ static int ext4_xattr_trusted_csum_get(struct dentry *dentry, const char *name, return -EPERM; if (S_ISDIR(inode->i_mode)) - return ext4_xattr_get(inode, EXT4_XATTR_INDEX_TRUSTED, - EXT4_DATA_CSUM_NAME, buffer, size); + return ext4_xattr_get(inode, EXT4_XATTR_INDEX_TRUSTED_CSUM, + "", buffer, size); if (!S_ISREG(inode->i_mode)) return -ENODATA; @@ -717,8 +717,8 @@ static int ext4_xattr_trusted_csum_set(struct dentry *dentry, const char *name, else return -EINVAL; - return ext4_xattr_set(inode, EXT4_XATTR_INDEX_TRUSTED, - EXT4_DATA_CSUM_NAME, value, size, flags); + return ext4_xattr_set(inode, EXT4_XATTR_INDEX_TRUSTED_CSUM, + "", value, size, flags); } if (!S_ISREG(inode->i_mode)) @@ -763,7 +76
Re: [Devel] [PATCH RH7] sysctl: panic only on softlockup_panic-th consequent softlockup
Pasha, 1) please write a good description. Why it's needed? How to use? 2) i thought we came up to the variant when sysctl defines not the number of softlockups in a row, but the delay in seconds? 3) please put the reviewer Thank you. -- Best regards, Konstantin Khorenko, Virtuozzo Linux Kernel Team On 09/21/2016 05:27 PM, Pavel Tikhomirov wrote: https://jira.sw.ru/browse/PSBM-52199 Signed-off-by: Pavel Tikhomirov --- kernel/sysctl.c | 3 ++- kernel/watchdog.c | 36 +++- 2 files changed, 37 insertions(+), 2 deletions(-) diff --git a/kernel/sysctl.c b/kernel/sysctl.c index c8f7bc3..40dfc98 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -123,6 +123,7 @@ EXPORT_SYMBOL(ve_allow_module_load); #ifdef CONFIG_LOCKUP_DETECTOR static int sixty = 60; static int neg_one = -1; +static int int_max = INT_MAX; #endif static int zero; @@ -910,7 +911,7 @@ static struct ctl_table kern_table[] = { .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &zero, - .extra2 = &one, + .extra2 = &int_max, }, #ifdef CONFIG_SMP { diff --git a/kernel/watchdog.c b/kernel/watchdog.c index ba61141..171255b 100644 --- a/kernel/watchdog.c +++ b/kernel/watchdog.c @@ -304,6 +304,40 @@ static void watchdog_interrupt_count(void) static int watchdog_nmi_enable(unsigned int cpu); static void watchdog_nmi_disable(unsigned int cpu); +/* + * Delay panic until softlockup_panic softlockups in raw. + * Consider softlockups are in raw if they fit in interval + * of twice as softlockup_panic * softlockup_thresh. + * (Soft lockups most likely will come one just after another + * with period of softlockup_thresh, but to cover the accumulating + * error give them twice as much the time as teoreticaly needed.) + */ + +static int need_panic_on_softlockup(void) +{ + static raw_spinlock_t lock = __RAW_SPIN_LOCK_UNLOCKED(lock); + static unsigned long intend; + static int count; + static int thresh; + unsigned long now = get_timestamp(); + int slp = softlockup_panic; + + if (!slp) + return 0; + + raw_spin_lock(&lock); + if (!intend || time_after(now, intend)) { + intend = now + 2 * slp * get_softlockup_thresh(); + thresh = slp; + count = 0; + } + if (++count >= thresh) + return 1; + raw_spin_unlock(&lock); + + return 0; +} + /* watchdog kicker functions */ static enum hrtimer_restart watchdog_timer_fn(struct hrtimer *hrtimer) { @@ -390,7 +424,7 @@ static enum hrtimer_restart watchdog_timer_fn(struct hrtimer *hrtimer) } add_taint(TAINT_SOFTLOCKUP, LOCKDEP_STILL_OK); - if (softlockup_panic) + if (need_panic_on_softlockup()) panic("softlockup: hung tasks"); __this_cpu_write(soft_watchdog_warn, true); } else ___ Devel mailing list Devel@openvz.org https://lists.openvz.org/mailman/listinfo/devel
Re: [Devel] [PATCH rh7 2/2] ms/dm: remove dummy definition of 'struct dm_table'
On 09/23/2016 05:13 PM, Konstantin Khorenko wrote: > Why mainstream still keeps it? > By mistake, I guess. > -- > Best regards, > > Konstantin Khorenko, > Virtuozzo Linux Kernel Team > > On 09/22/2016 07:44 PM, Andrey Ryabinin wrote: >> There is no need for it. >> >> https://jira.sw.ru/browse/PSBM-50727 >> >> Signed-off-by: Andrey Ryabinin >> --- >> drivers/md/dm-ioctl.c | 8 >> 1 file changed, 8 deletions(-) >> >> diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c >> index 720ceeb..0fe4233 100644 >> --- a/drivers/md/dm-ioctl.c >> +++ b/drivers/md/dm-ioctl.c >> @@ -36,14 +36,6 @@ struct hash_cell { >> struct dm_table *new_map; >> }; >> >> -/* >> - * A dummy definition to make RCU happy. >> - * struct dm_table should never be dereferenced in this file. >> - */ >> -struct dm_table { >> -int undefined__; >> -}; >> - >> struct vers_iter { >> size_t param_size; >> struct dm_target_versions *vers, *old_vers; >> ___ Devel mailing list Devel@openvz.org https://lists.openvz.org/mailman/listinfo/devel
[Devel] [PATCH RHEL7 COMMIT] ms/dm: remove dummy definition of 'struct dm_table'
The commit is pushed to "branch-rh7-3.10.0-327.28.2.vz7.17.x-ovz" and will appear at https://src.openvz.org/scm/ovz/vzkernel.git after rh7-3.10.0-327.28.2.vz7.17.9 --> commit 718f12861b3e5d7494b17e6a753cdef8b1f0a5f4 Author: Mike Snitzer Date: Fri Sep 23 18:15:11 2016 +0400 ms/dm: remove dummy definition of 'struct dm_table' Change the map pointer in 'struct mapped_device' from 'struct dm_table __rcu *' to 'void __rcu *' to avoid the need for the dummy definition. Signed-off-by: Mike Snitzer https://jira.sw.ru/browse/PSBM-50727 (cherry picked from commit 1d3aa6f683b1c1a813a63339d7309cff58ba4531) Signed-off-by: Andrey Ryabinin --- drivers/md/dm.c | 14 +++--- 1 file changed, 3 insertions(+), 11 deletions(-) diff --git a/drivers/md/dm.c b/drivers/md/dm.c index d9a24c9..a7993cf 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -129,14 +129,6 @@ EXPORT_SYMBOL_GPL(dm_get_rq_mapinfo); #define DMF_SUSPENDED_INTERNALLY 8 /* - * A dummy definition to make RCU happy. - * struct dm_table should never be dereferenced in this file. - */ -struct dm_table { - int undefined__; -}; - -/* * Work processed by per-device workqueue. */ struct mapped_device { @@ -146,11 +138,11 @@ struct mapped_device { atomic_t open_count; /* -* The current mapping. +* The current mapping (struct dm_table *). * Use dm_get_live_table{_fast} or take suspend_lock for * dereference. */ - struct dm_table __rcu *map; + void __rcu *map; struct list_head table_devices; struct mutex table_devices_lock; @@ -2694,7 +2686,7 @@ static struct dm_table *__bind(struct mapped_device *md, struct dm_table *t, merge_is_optional = dm_table_merge_is_optional(t); old_map = rcu_dereference_protected(md->map, lockdep_is_held(&md->suspend_lock)); - rcu_assign_pointer(md->map, t); + rcu_assign_pointer(md->map, (void *)t); md->immutable_target_type = dm_table_get_immutable_target_type(t); dm_table_set_restrictions(t, q, limits); ___ Devel mailing list Devel@openvz.org https://lists.openvz.org/mailman/listinfo/devel
Re: [Devel] [PATCH] ext4: Discard preallocated block before swap_extents
Dima, The patch looks fine and it works in my tests, but it slightly changes user-visible behavior: before patch, if ioctl(MOVE) failed, the user always saw moved_len=0. Now, with the patch applied, it can be !=0. (because ext4_ioctl() copies "me" back to user even if err != 0) I understand that it matter of taste, but the code is more readable (imho) if all functions keep output args intact on failure. Hence, it would be nice to accumulate "cur_len" in some local var and then, in the end of ext4_move_extents, assign *moved_len only if ret == 0. The above is pretty minor, so: Reviewed-by: Maxim Patlasov Thanks, Maxim On 09/20/2016 10:41 AM, Dmitry Monakhov wrote: Inode preallocation consists of two parts (used and unused) fully controlled by inode, so it must be discarded before swap extents. Currently we may skip drop_preallocation if file is sparse. This patch does: - Moves ext4_discard_preallocations to ext4_swap_extents. This makes more readable and reliable for future changes. - Cleanup main move_extent loop xfstests:ext4/024 (pended: https://github.com/dmonakhov/xfstests/commit/7a4763963f73ea5d5bba45eefa484494aa3df7cf) Signed-off-by: Dmitry Monakhov --- fs/ext4/extents.c | 2 ++ fs/ext4/move_extent.c | 17 + 2 files changed, 7 insertions(+), 12 deletions(-) diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index d7ccb7f..757ffb8 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -5799,9 +5799,11 @@ ext4_swap_extents(handle_t *handle, struct inode *inode1, BUG_ON(!inode_is_locked(inode1)); BUG_ON(!inode_is_locked(inode2)); + ext4_discard_preallocations(inode1); *erp = ext4_es_remove_extent(inode1, lblk1, count); if (unlikely(*erp)) return 0; + ext4_discard_preallocations(inode2); *erp = ext4_es_remove_extent(inode2, lblk2, count); if (unlikely(*erp)) return 0; diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c index 6fc14de..24a9586 100644 --- a/fs/ext4/move_extent.c +++ b/fs/ext4/move_extent.c @@ -632,7 +632,7 @@ ext4_move_extents(struct file *o_filp, struct file *d_filp, __u64 orig_blk, ret = get_ext_path(orig_inode, o_start, &path); if (ret) - goto out; + break; ex = path[path->p_depth].p_ext; next_blk = ext4_ext_next_allocated_block(path); cur_blk = le32_to_cpu(ex->ee_block); @@ -642,7 +642,7 @@ ext4_move_extents(struct file *o_filp, struct file *d_filp, __u64 orig_blk, if (next_blk == EXT_MAX_BLOCKS) { o_start = o_end; ret = -ENODATA; - goto out; + break; } d_start += next_blk - o_start; o_start = next_blk; @@ -654,7 +654,7 @@ ext4_move_extents(struct file *o_filp, struct file *d_filp, __u64 orig_blk, o_start = cur_blk; /* Extent inside requested range ?*/ if (cur_blk >= o_end) - goto out; + break; } else { /* in_range(o_start, o_blk, o_len) */ cur_len += cur_blk - o_start; } @@ -687,17 +687,10 @@ ext4_move_extents(struct file *o_filp, struct file *d_filp, __u64 orig_blk, break; o_start += cur_len; d_start += cur_len; + *moved_len += cur_len; } - *moved_len = o_start - orig_blk; - if (*moved_len > len) - *moved_len = len; - out: - if (*moved_len) { - ext4_discard_preallocations(orig_inode); - ext4_discard_preallocations(donor_inode); - } - + WARN_ON(*moved_len > len); ext4_ext_drop_refs(path); kfree(path); ext4_double_up_write_data_sem(orig_inode, donor_inode); ___ Devel mailing list Devel@openvz.org https://lists.openvz.org/mailman/listinfo/devel