diff options
| -rw-r--r-- | fs/ntfs/ChangeLog | 1 | ||||
| -rw-r--r-- | fs/ntfs/aops.c | 5 | ||||
| -rw-r--r-- | fs/ntfs/attrib.c | 2 | ||||
| -rw-r--r-- | fs/ntfs/file.c | 14 | ||||
| -rw-r--r-- | fs/ntfs/layout.h | 27 |
5 files changed, 35 insertions, 14 deletions
diff --git a/fs/ntfs/ChangeLog b/fs/ntfs/ChangeLog index 03015c7b236..bc6ec16ad1f 100644 --- a/fs/ntfs/ChangeLog +++ b/fs/ntfs/ChangeLog @@ -75,6 +75,7 @@ ToDo/Notes: for highly fragmented files, i.e. ones whose data attribute is split across multiple extents. When such a case is encountered, EOPNOTSUPP is returned. + - $EA attributes can be both resident non-resident. 2.1.24 - Lots of bug fixes and support more clean journal states. diff --git a/fs/ntfs/aops.c b/fs/ntfs/aops.c index 8f23c60030c..1c0a4315876 100644 --- a/fs/ntfs/aops.c +++ b/fs/ntfs/aops.c @@ -1391,8 +1391,7 @@ retry_writepage: if (NInoEncrypted(ni)) { unlock_page(page); BUG_ON(ni->type != AT_DATA); - ntfs_debug("Denying write access to encrypted " - "file."); + ntfs_debug("Denying write access to encrypted file."); return -EACCES; } /* Compressed data streams are handled in compress.c. */ @@ -1508,8 +1507,8 @@ retry_writepage: /* Zero out of bounds area in the page cache page. */ memset(kaddr + attr_len, 0, PAGE_CACHE_SIZE - attr_len); kunmap_atomic(kaddr, KM_USER0); - flush_dcache_mft_record_page(ctx->ntfs_ino); flush_dcache_page(page); + flush_dcache_mft_record_page(ctx->ntfs_ino); /* We are done with the page. */ end_page_writeback(page); /* Finally, mark the mft record dirty, so it gets written back. */ diff --git a/fs/ntfs/attrib.c b/fs/ntfs/attrib.c index 338e47144fc..df2e2091f93 100644 --- a/fs/ntfs/attrib.c +++ b/fs/ntfs/attrib.c @@ -1411,7 +1411,7 @@ int ntfs_attr_can_be_non_resident(const ntfs_volume *vol, const ATTR_TYPE type) */ int ntfs_attr_can_be_resident(const ntfs_volume *vol, const ATTR_TYPE type) { - if (type == AT_INDEX_ALLOCATION || type == AT_EA) + if (type == AT_INDEX_ALLOCATION) return -EPERM; return 0; } diff --git a/fs/ntfs/file.c b/fs/ntfs/file.c index cf2a0e2330d..5fb341a16b5 100644 --- a/fs/ntfs/file.c +++ b/fs/ntfs/file.c @@ -1857,10 +1857,24 @@ static ssize_t ntfs_file_buffered_write(struct kiocb *iocb, if (ni->type != AT_INDEX_ALLOCATION) { /* If file is encrypted, deny access, just like NT4. */ if (NInoEncrypted(ni)) { + /* + * Reminder for later: Encrypted files are _always_ + * non-resident so that the content can always be + * encrypted. + */ ntfs_debug("Denying write access to encrypted file."); return -EACCES; } if (NInoCompressed(ni)) { + /* Only unnamed $DATA attribute can be compressed. */ + BUG_ON(ni->type != AT_DATA); + BUG_ON(ni->name_len); + /* + * Reminder for later: If resident, the data is not + * actually compressed. Only on the switch to non- + * resident does compression kick in. This is in + * contrast to encrypted files (see above). + */ ntfs_error(vi->i_sb, "Writing to compressed files is " "not implemented yet. Sorry."); return -EOPNOTSUPP; diff --git a/fs/ntfs/layout.h b/fs/ntfs/layout.h index 5c248d404f0..71b25dab819 100644 --- a/fs/ntfs/layout.h +++ b/fs/ntfs/layout.h @@ -1021,10 +1021,17 @@ enum { FILE_NAME_POSIX = 0x00, /* This is the largest namespace. It is case sensitive and allows all Unicode characters except for: '\0' and '/'. Beware that in - WinNT/2k files which eg have the same name except for their case - will not be distinguished by the standard utilities and thus a "del - filename" will delete both "filename" and "fileName" without - warning. */ + WinNT/2k/2003 by default files which eg have the same name except + for their case will not be distinguished by the standard utilities + and thus a "del filename" will delete both "filename" and "fileName" + without warning. However if for example Services For Unix (SFU) are + installed and the case sensitive option was enabled at installation + time, then you can create/access/delete such files. + Note that even SFU places restrictions on the filenames beyond the + '\0' and '/' and in particular the following set of characters is + not allowed: '"', '/', '<', '>', '\'. All other characters, + including the ones no allowed in WIN32 namespace are allowed. + Tested with SFU 3.5 (this is now free) running on Windows XP. */ FILE_NAME_WIN32 = 0x01, /* The standard WinNT/2k NTFS long filenames. Case insensitive. All Unicode chars except: '\0', '"', '*', '/', ':', '<', '>', '?', '\', @@ -2375,20 +2382,20 @@ typedef u8 EA_FLAGS; /* * Attribute: Extended attribute (EA) (0xe0). * - * NOTE: Always non-resident. (Is this true?) + * NOTE: Can be resident or non-resident. * * Like the attribute list and the index buffer list, the EA attribute value is * a sequence of EA_ATTR variable length records. - * - * FIXME: It appears weird that the EA name is not unicode. Is it true? */ typedef struct { le32 next_entry_offset; /* Offset to the next EA_ATTR. */ EA_FLAGS flags; /* Flags describing the EA. */ - u8 ea_name_length; /* Length of the name of the EA in bytes. */ + u8 ea_name_length; /* Length of the name of the EA in bytes + excluding the '\0' byte terminator. */ le16 ea_value_length; /* Byte size of the EA's value. */ - u8 ea_name[0]; /* Name of the EA. */ - u8 ea_value[0]; /* The value of the EA. Immediately follows + u8 ea_name[0]; /* Name of the EA. Note this is ASCII, not + Unicode and it is zero terminated. */ + u8 ea_value[0]; /* The value of the EA. Immediately follows the name. */ } __attribute__ ((__packed__)) EA_ATTR; |