From: Li Xi Subject: Re: [PATCH v2 2/4] quota: add project quota support Date: Sat, 9 Aug 2014 00:43:27 +0800 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 To: linux-fsdevel@vger.kernel.org, Ext4 Developers List , viro@zeniv.linux.org.uk, hch@infradead.org, Jan Kara Return-path: Sender: linux-fsdevel-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org Adds project ID support for ext4 This patch adds a new internal field of ext4 inode to save project identifier. Signed-off-by: Li Xi ddn.com> --- Index: linux.git/fs/ext4/ialloc.c =================================================================== --- linux.git.orig/fs/ext4/ialloc.c +++ linux.git/fs/ext4/ialloc.c @@ -756,6 +756,10 @@ struct inode *__ext4_new_inode(handle_t inode->i_gid = dir->i_gid; } else inode_init_owner(inode, dir, mode); +#ifdef CONFIG_QUOTA_PROJECT + if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_PROJECT)) + ei->i_projid = EXT4_I(dir)->i_projid; +#endif dquot_initialize(inode); if (!goal) Index: linux.git/fs/ext4/ext4.h =================================================================== --- linux.git.orig/fs/ext4/ext4.h +++ linux.git/fs/ext4/ext4.h @@ -695,6 +695,7 @@ struct ext4_inode { __le32 i_crtime; /* File Creation time */ __le32 i_crtime_extra; /* extra FileCreationtime (nsec << 2 | epoch) */ __le32 i_version_hi; /* high 32 bits for 64-bit version */ + __le32 i_projid; /* Project ID */ }; struct move_extent { @@ -943,6 +944,9 @@ struct ext4_inode_info { /* Precomputed uuid+inum+igen checksum for seeding inode checksums */ __u32 i_csum_seed; +#ifdef CONFIG_QUOTA_PROJECT + kprojid_t i_projid; +#endif }; /* @@ -1525,6 +1529,7 @@ static inline void ext4_clear_state_flag * GDT_CSUM bits are mutually exclusive. */ #define EXT4_FEATURE_RO_COMPAT_METADATA_CSUM 0x0400 +#define EXT4_FEATURE_RO_COMPAT_PROJECT 0x1000 /* Project quota */ #define EXT4_FEATURE_INCOMPAT_COMPRESSION 0x0001 #define EXT4_FEATURE_INCOMPAT_FILETYPE 0x0002 @@ -1574,7 +1579,8 @@ static inline void ext4_clear_state_flag EXT4_FEATURE_RO_COMPAT_HUGE_FILE |\ EXT4_FEATURE_RO_COMPAT_BIGALLOC |\ EXT4_FEATURE_RO_COMPAT_METADATA_CSUM|\ - EXT4_FEATURE_RO_COMPAT_QUOTA) + EXT4_FEATURE_RO_COMPAT_QUOTA |\ + EXT4_FEATURE_RO_COMPAT_PROJECT) /* * Default values for user and/or group using reserved blocks @@ -2133,6 +2139,9 @@ extern int ext4_zero_partial_blocks(hand loff_t lstart, loff_t lend); extern int ext4_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf); extern qsize_t *ext4_get_reserved_space(struct inode *inode); +#ifdef CONFIG_QUOTA_PROJECT +extern int ext4_get_projid(struct inode *inode, kprojid_t *projid); +#endif extern void ext4_da_update_reserve_space(struct inode *inode, int used, int quota_claim); Index: linux.git/fs/ext4/inode.c =================================================================== --- linux.git.orig/fs/ext4/inode.c +++ linux.git/fs/ext4/inode.c @@ -4026,6 +4026,47 @@ static inline void ext4_iget_extra_inode EXT4_I(inode)->i_inline_off = 0; } +#ifdef CONFIG_QUOTA_PROJECT +static int ext4_inode_projid_get(struct inode *inode, struct ext4_inode *raw, + struct ext4_inode_info *ei, projid_t *projid) +{ + BUG_ON(!EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb, + EXT4_FEATURE_RO_COMPAT_PROJECT)); + + if (EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE && + EXT4_FITS_IN_INODE(raw, ei, i_projid)) { + *projid = (projid_t)le32_to_cpu(raw->i_projid); + return 0; + } + return -EFBIG; +} + +static int ext4_inode_projid_set(struct inode *inode, struct ext4_inode *raw, + struct ext4_inode_info *ei, projid_t projid) +{ + BUG_ON(!EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb, + EXT4_FEATURE_RO_COMPAT_PROJECT)); + + if (EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE && + EXT4_FITS_IN_INODE(raw, ei, i_projid)) { + raw->i_projid = cpu_to_le32(projid); + return 0; + } + return -EFBIG; +} + +int ext4_get_projid(struct inode *inode, kprojid_t *projid) +{ + if (!EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb, + EXT4_FEATURE_RO_COMPAT_PROJECT)) { + return -ENOTSUPP; + } + + *projid = EXT4_I(inode)->i_projid; + return 0; +} +#endif + struct inode *ext4_iget(struct super_block *sb, unsigned long ino) { struct ext4_iloc iloc; @@ -4037,6 +4078,9 @@ struct inode *ext4_iget(struct super_blo int block; uid_t i_uid; gid_t i_gid; +#ifdef CONFIG_QUOTA_PROJECT + projid_t i_projid = 0; +#endif inode = iget_locked(sb, ino); if (!inode) @@ -4087,12 +4131,26 @@ struct inode *ext4_iget(struct super_blo inode->i_mode = le16_to_cpu(raw_inode->i_mode); i_uid = (uid_t)le16_to_cpu(raw_inode->i_uid_low); i_gid = (gid_t)le16_to_cpu(raw_inode->i_gid_low); +#ifdef CONFIG_QUOTA_PROJECT + if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_PROJECT)) { + ret = ext4_inode_projid_get(inode, raw_inode, ei, &i_projid); + if (ret) { + EXT4_ERROR_INODE(inode, "failed to get project ID"); + goto bad_inode; + } + } +#endif + if (!(test_opt(inode->i_sb, NO_UID32))) { i_uid |= le16_to_cpu(raw_inode->i_uid_high) << 16; i_gid |= le16_to_cpu(raw_inode->i_gid_high) << 16; } i_uid_write(inode, i_uid); i_gid_write(inode, i_gid); +#ifdef CONFIG_QUOTA_PROJECT + if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_PROJECT)) + ei->i_projid = make_kprojid(&init_user_ns, i_projid);; +#endif set_nlink(inode, le16_to_cpu(raw_inode->i_links_count)); ext4_clear_state_flags(ei); /* Only relevant on 32-bit archs */ @@ -4315,6 +4373,9 @@ static int ext4_do_update_inode(handle_t int need_datasync = 0, set_large_file = 0; uid_t i_uid; gid_t i_gid; +#ifdef CONFIG_QUOTA_PROJECT + projid_t i_projid = 0; +#endif spin_lock(&ei->i_raw_lock); @@ -4327,6 +4388,10 @@ static int ext4_do_update_inode(handle_t raw_inode->i_mode = cpu_to_le16(inode->i_mode); i_uid = i_uid_read(inode); i_gid = i_gid_read(inode); +#ifdef CONFIG_QUOTA_PROJECT + if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_PROJECT)) + i_projid = from_kprojid(&init_user_ns, ei->i_projid); +#endif if (!(test_opt(inode->i_sb, NO_UID32))) { raw_inode->i_uid_low = cpu_to_le16(low_16_bits(i_uid)); raw_inode->i_gid_low = cpu_to_le16(low_16_bits(i_gid)); @@ -4356,7 +4421,8 @@ static int ext4_do_update_inode(handle_t EXT4_INODE_SET_XTIME(i_atime, inode, raw_inode); EXT4_EINODE_SET_XTIME(i_crtime, ei, raw_inode); - if (ext4_inode_blocks_set(handle, raw_inode, ei)) { + err = ext4_inode_blocks_set(handle, raw_inode, ei); + if (err) { spin_unlock(&ei->i_raw_lock); goto out_brelse; } @@ -4407,6 +4473,16 @@ static int ext4_do_update_inode(handle_t ext4_inode_csum_set(inode, raw_inode, ei); +#ifdef CONFIG_QUOTA_PROJECT + if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_PROJECT)) { + err = ext4_inode_projid_set(inode, raw_inode, ei, i_projid); + if (err) { + spin_unlock(&ei->i_raw_lock); + goto out_brelse; + } + } +#endif + spin_unlock(&ei->i_raw_lock); BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata"); Index: linux.git/fs/ext4/super.c =================================================================== --- linux.git.orig/fs/ext4/super.c +++ linux.git/fs/ext4/super.c @@ -1080,6 +1080,9 @@ static const struct dquot_operations ext .write_info = ext4_write_info, .alloc_dquot = dquot_alloc, .destroy_dquot = dquot_destroy, +#ifdef CONFIG_QUOTA_PROJECT + .get_projid = ext4_get_projid, +#endif }; static const struct quotactl_ops ext4_qctl_operations = {