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a=openpgp; fpr=28B2E5B01286DF243CF23EFE336AB3336F667F97 X-Headers-End: 1wKuUV-00029e-Mj Subject: [f2fs-dev] [PATCH v14 03/15] fat: Implement fileattr_get for case sensitivity X-BeenThere: linux-f2fs-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Chuck Lever via Linux-f2fs-devel Reply-To: Chuck Lever Cc: pc@manguebit.org, yuezhang.mo@sony.com, cem@kernel.org, Roland Mainz , almaz.alexandrovich@paragon-software.com, adilger.kernel@dilger.ca, linux-cifs@vger.kernel.org, sfrench@samba.org, slava@dubeyko.com, linux-ext4@vger.kernel.org, linkinjeon@kernel.org, sprasad@microsoft.com, frank.li@vivo.com, ronniesahlberg@gmail.com, glaubitz@physik.fu-berlin.de, jaegeuk@kernel.org, hirofumi@mail.parknet.co.jp, linux-nfs@vger.kernel.org, tytso@mit.edu, linux-api@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-xfs@vger.kernel.org, senozhatsky@chromium.org, Chuck Lever , hansg@kernel.org, anna@kernel.org, linux-fsdevel@vger.kernel.org, sj1557.seo@samsung.com, trondmy@kernel.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net From: Chuck Lever Report FAT's case sensitivity behavior via the FS_XFLAG_CASEFOLD and FS_XFLAG_CASENONPRESERVING flags. FAT filesystems are case-insensitive by default. MSDOS supports a 'nocase' mount option that enables case-sensitive behavior; check this option when reporting case sensitivity. VFAT long filename entries preserve case; without VFAT, only uppercased 8.3 short names are stored. MSDOS with 'nocase' also preserves case since the name-formatting code skips upcasing when 'nocase' is set. Check both options when reporting case preservation. Reviewed-by: Jan Kara Reviewed-by: Roland Mainz Signed-off-by: Chuck Lever --- fs/fat/fat.h | 3 +++ fs/fat/file.c | 36 ++++++++++++++++++++++++++++++++++++ fs/fat/namei_msdos.c | 1 + fs/fat/namei_vfat.c | 1 + 4 files changed, 41 insertions(+) diff --git a/fs/fat/fat.h b/fs/fat/fat.h index 5a58f0bf8ce8..99ed9228a677 100644 --- a/fs/fat/fat.h +++ b/fs/fat/fat.h @@ -10,6 +10,8 @@ #include #include +struct file_kattr; + /* * vfat shortname flags */ @@ -408,6 +410,7 @@ extern void fat_truncate_blocks(struct inode *inode, loff_t offset); extern int fat_getattr(struct mnt_idmap *idmap, const struct path *path, struct kstat *stat, u32 request_mask, unsigned int flags); +int fat_fileattr_get(struct dentry *dentry, struct file_kattr *fa); extern int fat_file_fsync(struct file *file, loff_t start, loff_t end, int datasync); diff --git a/fs/fat/file.c b/fs/fat/file.c index becccdd2e501..37e7049b4c8c 100644 --- a/fs/fat/file.c +++ b/fs/fat/file.c @@ -17,6 +17,7 @@ #include #include #include +#include #include "fat.h" static long fat_fallocate(struct file *file, int mode, @@ -398,6 +399,40 @@ void fat_truncate_blocks(struct inode *inode, loff_t offset) fat_flush_inodes(inode->i_sb, inode, NULL); } +int fat_fileattr_get(struct dentry *dentry, struct file_kattr *fa) +{ + struct msdos_sb_info *sbi = MSDOS_SB(dentry->d_sb); + bool case_sensitive; + + /* + * FAT filesystems are case-insensitive by default. VFAT + * becomes case-sensitive when mounted with 'check=strict', + * which installs vfat_dentry_ops. MSDOS has no such option; + * its 'nocase' mount option selects case-sensitive matching. + * + * VFAT long filename entries preserve case. Without VFAT, only + * uppercased 8.3 short names are stored. MSDOS with 'nocase' + * also preserves case. + */ + if (sbi->options.isvfat) + case_sensitive = sbi->options.name_check == 's'; + else + case_sensitive = sbi->options.nocase; + + if (!case_sensitive) { + fa->fsx_xflags |= FS_XFLAG_CASEFOLD; + fa->flags |= FS_CASEFOLD_FL; + if (!sbi->options.isvfat) + fa->fsx_xflags |= FS_XFLAG_CASENONPRESERVING; + } + if (d_inode(dentry)->i_flags & S_IMMUTABLE) { + fa->fsx_xflags |= FS_XFLAG_IMMUTABLE; + fa->flags |= FS_IMMUTABLE_FL; + } + return 0; +} +EXPORT_SYMBOL_GPL(fat_fileattr_get); + int fat_getattr(struct mnt_idmap *idmap, const struct path *path, struct kstat *stat, u32 request_mask, unsigned int flags) { @@ -575,5 +610,6 @@ EXPORT_SYMBOL_GPL(fat_setattr); const struct inode_operations fat_file_inode_operations = { .setattr = fat_setattr, .getattr = fat_getattr, + .fileattr_get = fat_fileattr_get, .update_time = fat_update_time, }; diff --git a/fs/fat/namei_msdos.c b/fs/fat/namei_msdos.c index 4cc65f330fb7..0fd2971ad4b1 100644 --- a/fs/fat/namei_msdos.c +++ b/fs/fat/namei_msdos.c @@ -644,6 +644,7 @@ static const struct inode_operations msdos_dir_inode_operations = { .rename = msdos_rename, .setattr = fat_setattr, .getattr = fat_getattr, + .fileattr_get = fat_fileattr_get, .update_time = fat_update_time, }; diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c index 918b3756674c..e909447873e3 100644 --- a/fs/fat/namei_vfat.c +++ b/fs/fat/namei_vfat.c @@ -1185,6 +1185,7 @@ static const struct inode_operations vfat_dir_inode_operations = { .rename = vfat_rename2, .setattr = fat_setattr, .getattr = fat_getattr, + .fileattr_get = fat_fileattr_get, .update_time = fat_update_time, }; -- 2.53.0 _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel