#include <linux/gfs2_ondisk.h>
#include <linux/ext2_fs.h>
#include <linux/crc32.h>
+#include <linux/iflags.h>
#include <asm/semaphore.h>
#include <asm/uaccess.h>
return error;
}
-const struct gfs2_flag_eattr {
- u32 flag;
- u32 ext2;
-} gfs2_flag_eattrs[] = {
- {
- .flag = GFS2_DIF_IMMUTABLE,
- .ext2 = EXT2_IMMUTABLE_FL,
- }, {
- .flag = GFS2_DIF_APPENDONLY,
- .ext2 = EXT2_APPEND_FL,
- }, {
- .flag = GFS2_DIF_JDATA,
- .ext2 = EXT2_JOURNAL_DATA_FL,
- }, {
- .flag = GFS2_DIF_EXHASH,
- .ext2 = EXT2_INDEX_FL,
- }, {
- .flag = GFS2_DIF_EA_INDIRECT,
- }, {
- .flag = GFS2_DIF_DIRECTIO,
- }, {
- .flag = GFS2_DIF_NOATIME,
- .ext2 = EXT2_NOATIME_FL,
- }, {
- .flag = GFS2_DIF_SYNC,
- .ext2 = EXT2_SYNC_FL,
- }, {
- .flag = GFS2_DIF_SYSTEM,
- }, {
- .flag = GFS2_DIF_TRUNC_IN_PROG,
- }, {
- .flag = GFS2_DIF_INHERIT_JDATA,
- }, {
- .flag = GFS2_DIF_INHERIT_DIRECTIO,
- }, {
- },
+static const u32 iflags_to_gfs2[32] = {
+ [iflag_Sync] = GFS2_DIF_SYNC,
+ [iflag_Immutable] = GFS2_DIF_IMMUTABLE,
+ [iflag_Append] = GFS2_DIF_APPENDONLY,
+ [iflag_NoAtime] = GFS2_DIF_NOATIME,
+ [iflag_Index] = GFS2_DIF_EXHASH,
+ [iflag_JournalData] = GFS2_DIF_JDATA,
+ [iflag_DirectIO] = GFS2_DIF_DIRECTIO,
+ [iflag_InheritDirectIO] = GFS2_DIF_INHERIT_DIRECTIO,
+ [iflag_InheritJdata] = GFS2_DIF_INHERIT_JDATA,
};
-static const struct gfs2_flag_eattr *get_by_ext2(u32 ext2)
-{
- const struct gfs2_flag_eattr *p = gfs2_flag_eattrs;
- for(; p->flag; p++) {
- if (ext2 == p->ext2)
- return p;
- }
- return NULL;
-}
-
-static const struct gfs2_flag_eattr *get_by_gfs2(u32 gfs2)
-{
- const struct gfs2_flag_eattr *p = gfs2_flag_eattrs;
- for(; p->flag; p++) {
- if (gfs2 == p->flag)
- return p;
- }
- return NULL;
-}
-
-static u32 gfs2_flags_to_ext2(u32 gfs2)
-{
- const struct gfs2_flag_eattr *ea;
- u32 ext2 = 0;
- u32 mask = 1;
-
- for(; mask != 0; mask <<=1) {
- if (mask & gfs2) {
- ea = get_by_gfs2(mask);
- if (ea)
- ext2 |= ea->ext2;
- }
- }
- return ext2;
-}
-
-static int gfs2_flags_from_ext2(u32 *gfs2, u32 ext2)
-{
- const struct gfs2_flag_eattr *ea;
- u32 mask = 1;
-
- for(; mask != 0; mask <<= 1) {
- if (mask & ext2) {
- ea = get_by_ext2(mask);
- if (ea == NULL)
- return -EINVAL;
- *gfs2 |= ea->flag;
- }
- }
- return 0;
-}
+static const u32 gfs2_to_iflags[32] = {
+ [gfs2fl_Sync] = IFLAG_SYNC,
+ [gfs2fl_Immutable] = IFLAG_IMMUTABLE,
+ [gfs2fl_AppendOnly] = IFLAG_APPEND,
+ [gfs2fl_NoAtime] = IFLAG_NOATIME,
+ [gfs2fl_ExHash] = IFLAG_INDEX,
+ [gfs2fl_Jdata] = IFLAG_JOURNAL_DATA,
+ [gfs2fl_Directio] = IFLAG_DIRECTIO,
+ [gfs2fl_InheritDirectio] = IFLAG_INHERITDIRECTIO,
+ [gfs2fl_InheritJdata] = IFLAG_INHERITJDATA,
+};
-static int get_ext2_flags(struct inode *inode, u32 __user *ptr)
+static int gfs2_get_flags(struct inode *inode, u32 __user *ptr)
{
struct gfs2_inode *ip = inode->u.generic_ip;
struct gfs2_holder gh;
int error;
- u32 ext2;
+ u32 iflags;
gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &gh);
error = gfs2_glock_nq_m_atime(1, &gh);
if (error)
return error;
- ext2 = gfs2_flags_to_ext2(ip->i_di.di_flags);
- if (put_user(ext2, ptr))
+ iflags = iflags_cvt(gfs2_to_iflags, ip->i_di.di_flags);
+ if (put_user(iflags, ptr))
error = -EFAULT;
gfs2_glock_dq_m(1, &gh);
* @mask: Indicates which flags are valid
*
*/
-static int gfs2_set_flags(struct inode *inode, u32 flags, u32 mask)
+static int do_gfs2_set_flags(struct inode *inode, u32 flags, u32 mask)
{
struct gfs2_inode *ip = inode->u.generic_ip;
struct buffer_head *bh;
return error;
}
-static int set_ext2_flags(struct inode *inode, u32 __user *ptr)
+static int gfs2_set_flags(struct inode *inode, u32 __user *ptr)
{
- u32 ext2, gfs2;
- if (get_user(ext2, ptr))
+ u32 iflags, gfsflags;
+ if (get_user(iflags, ptr))
return -EFAULT;
- if (gfs2_flags_from_ext2(&gfs2, ext2))
- return -EINVAL;
- return gfs2_set_flags(inode, gfs2, ~0);
+ gfsflags = iflags_cvt(iflags_to_gfs2, iflags);
+ return do_gfs2_set_flags(inode, gfsflags, ~0);
}
int gfs2_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long arg)
{
switch(cmd) {
- case EXT2_IOC_GETFLAGS:
- return get_ext2_flags(inode, (u32 __user *)arg);
- case EXT2_IOC_SETFLAGS:
- return set_ext2_flags(inode, (u32 __user *)arg);
+ case IFLAGS_GET_IOC:
+ return gfs2_get_flags(inode, (u32 __user *)arg);
+ case IFLAGS_SET_IOC:
+ return gfs2_set_flags(inode, (u32 __user *)arg);
}
return -ENOTTY;
}
--- /dev/null
+#ifndef _LINUX_IFLAGS_H
+#define _LINUX_IFLAGS_H
+
+/*
+ * A universal set of inode flags.
+ *
+ * Originally taken from ext2/3 with additions for other filesystems.
+ * Filesystems supporting this interface should interoperate with
+ * the lsattr and chattr command line tools.
+ *
+ * This interface is supported in whole or in part by:
+ * ext2
+ * ext3
+ * xfs
+ * jfs
+ * gfs2
+ *
+ */
+
+#define IFLAGS_GET_IOC _IOR('f', 1, long)
+#define IFLAGS_SET_IOC _IOW('f', 2, long)
+
+/*
+ * These values are provided for use as indices of an array
+ * for use with the iflags_cvt function below
+ */
+enum {
+ iflag_SecureRm = 0, /* Secure deletion */
+ iflag_Unrm = 1, /* Undelete */
+ iflag_Compress = 2, /* Compress file */
+ iflag_Sync = 3, /* Synchronous updates */
+ iflag_Immutable = 4, /* Immutable */
+ iflag_Append = 5, /* Append */
+ iflag_NoDump = 6, /* Don't dump file */
+ iflag_NoAtime = 7, /* No atime updates */
+ /* Reserved for compression usage */
+ iflag_Dirty = 8,
+ iflag_ComprBlk = 9, /* One or more compressed clusters */
+ iflag_NoComp = 10, /* Don't compress */
+ iflag_Ecompr = 11, /* Compression error */
+ /* End of compression flags */
+ iflag_Btree = 12, /* btree format dir */
+ iflag_Index = 12, /* hash-indexed directory */
+ iflag_Imagic = 13, /* AFS directory */
+ iflag_JournalData = 14, /* file data should be journaled */
+ iflag_NoTail = 15, /* file tail should not be merged */
+ iflag_DirSync = 16, /* dirsync behaviour */
+ iflag_TopDir = 17, /* Top of directory hierarchies */
+ iflag_DirectIO = 18, /* Always use direct I/O on this file */
+ iflag_InheritDirectIO = 19, /* Set DirectIO on new files in dir */
+ iflag_InheritJdata = 20, /* Set JournalData on create in dir */
+ iflag_Reserved = 31 /* reserved for ext2/3 lib */
+};
+
+#define __IFL(x) (1<<(iflag_##x))
+#define IFLAG_SECRM __IFL(SecureRm) /* 0x00000001 */
+#define IFLAG_UNRM __IFL(Unrm) /* 0x00000002 */
+#define IFLAG_COMPR __IFL(Compr) /* 0x00000004 */
+#define IFLAG_SYNC __IFL(Sync) /* 0x00000008 */
+#define IFLAG_IMMUTABLE __IFL(Immutable) /* 0x00000010 */
+#define IFLAG_APPEND __IFL(Append) /* 0x00000020 */
+#define IFLAG_NODUMP __IFL(NoDump) /* 0x00000040 */
+#define IFLAG_NOATIME __IFL(NoAtime) /* 0x00000080 */
+#define IFLAG_DIRTY __IFL(Dirty) /* 0x00000100 */
+#define IFLAG_COMPRBLK __IFL(ComprBlk) /* 0x00000200 */
+#define IFLAG_NOCOMP __IFL(NoComp) /* 0x00000400 */
+#define IFLAG_ECOMPR __IFL(Ecompr) /* 0x00000800 */
+#define IFLAG_BTREE __IFL(Btree) /* 0x00001000 */
+#define IFLAG_INDEX __IFL(Index) /* 0x00001000 */
+#define IFLAG_IMAGIC __IFL(Imagic) /* 0x00002000 */
+#define IFLAG_JOURNAL_DATA __IFL(JournalData) /* 0x00004000 */
+#define IFLAG_NOTAIL __IFL(NoTail) /* 0x00008000 */
+#define IFLAG_DIRSYNC __IFL(DirSync) /* 0x00010000 */
+#define IFLAG_TOPDIR __IFL(TopDir) /* 0x00020000 */
+#define IFLAG_DIRECTIO __IFL(DirectIO) /* 0x00040000 */
+#define IFLAG_INHERITDIRECTIO __IFL(InheritDirectIO) /* 0x00080000 */
+#define IFLAG_INHERITJDATA __IFL(InheritJdata) /* 0x00100000 */
+#define IFLAG_RESERVED __IFL(Reserved) /* 0x80000000 */
+
+#ifdef __KERNEL__
+/**
+ * iflags_cvt
+ * @table: A table of 32 u32 flags
+ * @val: a 32 bit value to convert
+ *
+ * This function can be used to convert between IFLAGS values and
+ * the filesystem's own flags values.
+ *
+ * Returns: the converted flags
+ */
+static inline u32 iflags_cvt(const u32 *table, u32 val)
+{
+ u32 res = 0;
+ while(val) {
+ if (val & 1)
+ res |= *table;
+ table++;
+ val >>= 1;
+ }
+ return res;
+}
+#endif /* __KERNEL__ */
+
+#endif /* _LINUX_IFLAGS_H */
projects / kernel / kernel-generic.git / commitdiff