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Message-ID: <5117A3E2.6090802@tao.ma> Date: Sun, 10 Feb 2013 21:42:58 +0800 From: Tao Ma <tm@....ma> To: Theodore Ts'o <tytso@....edu> CC: Ext4 Developers List <linux-ext4@...r.kernel.org>, Tao Ma <boyu.mt@...bao.com> Subject: Re: [PATCH 11/12] ext4: fix the number of credits needed for acl ops with inline data On 02/10/2013 05:53 AM, Theodore Ts'o wrote: > Operations which modify extended attributes may need extra journal > credits if inline data is used, since there is a chance that some > extended attributes may need to get pushed to an external attribute > block. > > Changes to reflect this was made in xattr.c, but they were missed in > fs/ext4/acl.c. To fix this, abstract the calculation of the number of > credits needed for xattr operations to an inline function defined in > ext4_jbd2.h, and use it in acl.c and xattr.c. Oh, yes, I forgot about the acl. Reviewed-by: Tao Ma <boyu.mt@...bao.com> Thanks, Tao > > Also move the function declarations used in inline.c from xattr.h > (where they are non-obviously hidden, and caused problems since > ext4_jbd2.h needs to use the function ext4_has_inline_data), and move > them to ext4.h. > > Signed-off-by: "Theodore Ts'o" <tytso@....edu> > Cc: Tao Ma <boyu.mt@...bao.com> > --- > fs/ext4/acl.c | 4 +-- > fs/ext4/ext4.h | 70 +++++++++++++++++++++++++++++++++++++++++++++++++++++ > fs/ext4/ext4_jbd2.h | 14 +++++++++++ > fs/ext4/xattr.c | 9 +------ > fs/ext4/xattr.h | 68 --------------------------------------------------- > 5 files changed, 87 insertions(+), 78 deletions(-) > > diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c > index 406cf8b..39a54a0 100644 > --- a/fs/ext4/acl.c > +++ b/fs/ext4/acl.c > @@ -325,7 +325,7 @@ ext4_acl_chmod(struct inode *inode) > return error; > retry: > handle = ext4_journal_start(inode, EXT4_HT_XATTR, > - EXT4_DATA_TRANS_BLOCKS(inode->i_sb)); > + ext4_jbd2_credits_xattr(inode)); > if (IS_ERR(handle)) { > error = PTR_ERR(handle); > ext4_std_error(inode->i_sb, error); > @@ -423,7 +423,7 @@ ext4_xattr_set_acl(struct dentry *dentry, const char *name, const void *value, > > retry: > handle = ext4_journal_start(inode, EXT4_HT_XATTR, > - EXT4_DATA_TRANS_BLOCKS(inode->i_sb)); > + ext4_jbd2_credits_xattr(inode)); > if (IS_ERR(handle)) { > error = PTR_ERR(handle); > goto release_and_out; > diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h > index c2c64da..9897cdf 100644 > --- a/fs/ext4/ext4.h > +++ b/fs/ext4/ext4.h > @@ -2443,6 +2443,75 @@ extern const struct file_operations ext4_file_operations; > extern loff_t ext4_llseek(struct file *file, loff_t offset, int origin); > extern void ext4_unwritten_wait(struct inode *inode); > > +/* inline.c */ > +extern int ext4_has_inline_data(struct inode *inode); > +extern int ext4_get_inline_size(struct inode *inode); > +extern int ext4_get_max_inline_size(struct inode *inode); > +extern int ext4_find_inline_data_nolock(struct inode *inode); > +extern void ext4_write_inline_data(struct inode *inode, > + struct ext4_iloc *iloc, > + void *buffer, loff_t pos, > + unsigned int len); > +extern int ext4_prepare_inline_data(handle_t *handle, struct inode *inode, > + unsigned int len); > +extern int ext4_init_inline_data(handle_t *handle, struct inode *inode, > + unsigned int len); > +extern int ext4_destroy_inline_data(handle_t *handle, struct inode *inode); > + > +extern int ext4_readpage_inline(struct inode *inode, struct page *page); > +extern int ext4_try_to_write_inline_data(struct address_space *mapping, > + struct inode *inode, > + loff_t pos, unsigned len, > + unsigned flags, > + struct page **pagep); > +extern int ext4_write_inline_data_end(struct inode *inode, > + loff_t pos, unsigned len, > + unsigned copied, > + struct page *page); > +extern struct buffer_head * > +ext4_journalled_write_inline_data(struct inode *inode, > + unsigned len, > + struct page *page); > +extern int ext4_da_write_inline_data_begin(struct address_space *mapping, > + struct inode *inode, > + loff_t pos, unsigned len, > + unsigned flags, > + struct page **pagep, > + void **fsdata); > +extern int ext4_da_write_inline_data_end(struct inode *inode, loff_t pos, > + unsigned len, unsigned copied, > + struct page *page); > +extern int ext4_try_add_inline_entry(handle_t *handle, struct dentry *dentry, > + struct inode *inode); > +extern int ext4_try_create_inline_dir(handle_t *handle, > + struct inode *parent, > + struct inode *inode); > +extern int ext4_read_inline_dir(struct file *filp, > + void *dirent, filldir_t filldir, > + int *has_inline_data); > +extern struct buffer_head *ext4_find_inline_entry(struct inode *dir, > + const struct qstr *d_name, > + struct ext4_dir_entry_2 **res_dir, > + int *has_inline_data); > +extern int ext4_delete_inline_entry(handle_t *handle, > + struct inode *dir, > + struct ext4_dir_entry_2 *de_del, > + struct buffer_head *bh, > + int *has_inline_data); > +extern int empty_inline_dir(struct inode *dir, int *has_inline_data); > +extern struct buffer_head *ext4_get_first_inline_block(struct inode *inode, > + struct ext4_dir_entry_2 **parent_de, > + int *retval); > +extern int ext4_inline_data_fiemap(struct inode *inode, > + struct fiemap_extent_info *fieinfo, > + int *has_inline); > +extern int ext4_try_to_evict_inline_data(handle_t *handle, > + struct inode *inode, > + int needed); > +extern void ext4_inline_data_truncate(struct inode *inode, int *has_inline); > + > +extern int ext4_convert_inline_data(struct inode *inode); > + > /* namei.c */ > extern const struct inode_operations ext4_dir_inode_operations; > extern const struct inode_operations ext4_special_inode_operations; > @@ -2539,6 +2608,7 @@ extern void ext4_mmp_csum_set(struct super_block *sb, struct mmp_struct *mmp); > extern int ext4_mmp_csum_verify(struct super_block *sb, > struct mmp_struct *mmp); > > + > /* BH_Uninit flag: blocks are allocated but uninitialized on disk */ > enum ext4_state_bits { > BH_Uninit /* blocks are allocated but uninitialized on disk */ > diff --git a/fs/ext4/ext4_jbd2.h b/fs/ext4/ext4_jbd2.h > index c1fc2dc..4c216b1 100644 > --- a/fs/ext4/ext4_jbd2.h > +++ b/fs/ext4/ext4_jbd2.h > @@ -104,6 +104,20 @@ > #define EXT4_MAXQUOTAS_INIT_BLOCKS(sb) (MAXQUOTAS*EXT4_QUOTA_INIT_BLOCKS(sb)) > #define EXT4_MAXQUOTAS_DEL_BLOCKS(sb) (MAXQUOTAS*EXT4_QUOTA_DEL_BLOCKS(sb)) > > +static inline int ext4_jbd2_credits_xattr(struct inode *inode) > +{ > + int credits = EXT4_DATA_TRANS_BLOCKS(inode->i_sb); > + > + /* > + * In case of inline data, we may push out the data to a block, > + * so we need to reserve credits for this eventuality > + */ > + if (ext4_has_inline_data(inode)) > + credits += ext4_writepage_trans_blocks(inode) + 1; > + return credits; > +} > + > + > /* > * Ext4 handle operation types -- for logging purposes > */ > diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c > index 2efc560..cc31da0 100644 > --- a/fs/ext4/xattr.c > +++ b/fs/ext4/xattr.c > @@ -1165,16 +1165,9 @@ ext4_xattr_set(struct inode *inode, int name_index, const char *name, > { > handle_t *handle; > int error, retries = 0; > - int credits = EXT4_DATA_TRANS_BLOCKS(inode->i_sb); > + int credits = ext4_jbd2_credits_xattr(inode); > > retry: > - /* > - * In case of inline data, we may push out the data to a block, > - * So reserve the journal space first. > - */ > - if (ext4_has_inline_data(inode)) > - credits += ext4_writepage_trans_blocks(inode) + 1; > - > handle = ext4_journal_start(inode, EXT4_HT_XATTR, credits); > if (IS_ERR(handle)) { > error = PTR_ERR(handle); > diff --git a/fs/ext4/xattr.h b/fs/ext4/xattr.h > index 69eda78..aa25deb 100644 > --- a/fs/ext4/xattr.h > +++ b/fs/ext4/xattr.h > @@ -125,74 +125,6 @@ extern int ext4_xattr_ibody_inline_set(handle_t *handle, struct inode *inode, > struct ext4_xattr_info *i, > struct ext4_xattr_ibody_find *is); > > -extern int ext4_has_inline_data(struct inode *inode); > -extern int ext4_get_inline_size(struct inode *inode); > -extern int ext4_get_max_inline_size(struct inode *inode); > -extern int ext4_find_inline_data_nolock(struct inode *inode); > -extern void ext4_write_inline_data(struct inode *inode, > - struct ext4_iloc *iloc, > - void *buffer, loff_t pos, > - unsigned int len); > -extern int ext4_prepare_inline_data(handle_t *handle, struct inode *inode, > - unsigned int len); > -extern int ext4_init_inline_data(handle_t *handle, struct inode *inode, > - unsigned int len); > -extern int ext4_destroy_inline_data(handle_t *handle, struct inode *inode); > - > -extern int ext4_readpage_inline(struct inode *inode, struct page *page); > -extern int ext4_try_to_write_inline_data(struct address_space *mapping, > - struct inode *inode, > - loff_t pos, unsigned len, > - unsigned flags, > - struct page **pagep); > -extern int ext4_write_inline_data_end(struct inode *inode, > - loff_t pos, unsigned len, > - unsigned copied, > - struct page *page); > -extern struct buffer_head * > -ext4_journalled_write_inline_data(struct inode *inode, > - unsigned len, > - struct page *page); > -extern int ext4_da_write_inline_data_begin(struct address_space *mapping, > - struct inode *inode, > - loff_t pos, unsigned len, > - unsigned flags, > - struct page **pagep, > - void **fsdata); > -extern int ext4_da_write_inline_data_end(struct inode *inode, loff_t pos, > - unsigned len, unsigned copied, > - struct page *page); > -extern int ext4_try_add_inline_entry(handle_t *handle, struct dentry *dentry, > - struct inode *inode); > -extern int ext4_try_create_inline_dir(handle_t *handle, > - struct inode *parent, > - struct inode *inode); > -extern int ext4_read_inline_dir(struct file *filp, > - void *dirent, filldir_t filldir, > - int *has_inline_data); > -extern struct buffer_head *ext4_find_inline_entry(struct inode *dir, > - const struct qstr *d_name, > - struct ext4_dir_entry_2 **res_dir, > - int *has_inline_data); > -extern int ext4_delete_inline_entry(handle_t *handle, > - struct inode *dir, > - struct ext4_dir_entry_2 *de_del, > - struct buffer_head *bh, > - int *has_inline_data); > -extern int empty_inline_dir(struct inode *dir, int *has_inline_data); > -extern struct buffer_head *ext4_get_first_inline_block(struct inode *inode, > - struct ext4_dir_entry_2 **parent_de, > - int *retval); > -extern int ext4_inline_data_fiemap(struct inode *inode, > - struct fiemap_extent_info *fieinfo, > - int *has_inline); > -extern int ext4_try_to_evict_inline_data(handle_t *handle, > - struct inode *inode, > - int needed); > -extern void ext4_inline_data_truncate(struct inode *inode, int *has_inline); > - > -extern int ext4_convert_inline_data(struct inode *inode); > - > #ifdef CONFIG_EXT4_FS_SECURITY > extern int ext4_init_security(handle_t *handle, struct inode *inode, > struct inode *dir, const struct qstr *qstr); > -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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