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| author | OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> | 2008-11-06 12:53:55 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-11-06 15:41:21 -0800 |
| commit | dfc209c0064efef5590f608056a48b61a5cac09c (patch) | |
| tree | 1ace2df7370944dd94b3c8f6a53acf6ea76fdd79 /fs/fat/fat.h | |
| parent | 9183482f5d4a2de00f66641b974e7f351d41b675 (diff) | |
| download | linux-dfc209c0064efef5590f608056a48b61a5cac09c.tar.gz linux-dfc209c0064efef5590f608056a48b61a5cac09c.tar.bz2 linux-dfc209c0064efef5590f608056a48b61a5cac09c.zip | |
fat: Fix ATTR_RO for directory
FAT has the ATTR_RO (read-only) attribute. But on Windows, the ATTR_RO
of the directory will be just ignored actually, and is used by only
applications as flag. E.g. it's setted for the customized folder by
Explorer.
http://msdn2.microsoft.com/en-us/library/aa969337.aspx
This adds "rodir" option. If user specified it, ATTR_RO is used as
read-only flag even if it's the directory. Otherwise, inode->i_mode
is not used to hold ATTR_RO (i.e. fat_mode_can_save_ro() returns 0).
Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/fat/fat.h')
| -rw-r--r-- | fs/fat/fat.h | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/fs/fat/fat.h b/fs/fat/fat.h index 313b645b8126..e9dce5d8e7a7 100644 --- a/fs/fat/fat.h +++ b/fs/fat/fat.h @@ -38,7 +38,8 @@ struct fat_mount_options { flush:1, /* write things quickly */ nocase:1, /* Does this need case conversion? 0=need case conversion*/ usefree:1, /* Use free_clusters for FAT32 */ - tz_utc:1; /* Filesystem timestamps are in UTC */ + tz_utc:1, /* Filesystem timestamps are in UTC */ + rodir:1; /* allow ATTR_RO for directory */ }; #define FAT_HASH_BITS 8 @@ -120,15 +121,20 @@ static inline struct msdos_inode_info *MSDOS_I(struct inode *inode) /* * If ->i_mode can't hold S_IWUGO (i.e. ATTR_RO), we use ->i_attrs to * save ATTR_RO instead of ->i_mode. + * + * If it's directory and !sbi->options.rodir, ATTR_RO isn't read-only + * bit, it's just used as flag for app. */ static inline int fat_mode_can_hold_ro(struct inode *inode) { struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb); mode_t mask; - if (S_ISDIR(inode->i_mode)) + if (S_ISDIR(inode->i_mode)) { + if (!sbi->options.rodir) + return 0; mask = ~sbi->options.fs_dmask; - else + } else mask = ~sbi->options.fs_fmask; if (!(mask & S_IWUGO)) @@ -140,7 +146,7 @@ static inline int fat_mode_can_hold_ro(struct inode *inode) static inline mode_t fat_make_mode(struct msdos_sb_info *sbi, u8 attrs, mode_t mode) { - if (attrs & ATTR_RO) + if (attrs & ATTR_RO && !((attrs & ATTR_DIR) && !sbi->options.rodir)) mode &= ~S_IWUGO; if (attrs & ATTR_DIR) |