Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

Pull quota and udf updates from Jan Kara:
 "The pull contains quota changes which complete unification of XFS and
  VFS quota interfaces (so tools can use either interface to manipulate
  any filesystem).  There's also a patch to support project quotas in
  VFS quota subsystem from Li Xi.

  Finally there's a bunch of UDF fixes and cleanups and tiny cleanup in
  reiserfs & ext3"

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs: (21 commits)
  udf: Update ctime and mtime when directory is modified
  udf: return correct errno for udf_update_inode()
  ext3: Remove useless condition in if statement.
  vfs: Add general support to enforce project quota limits
  reiserfs: fix __RASSERT format string
  udf: use int for allocated blocks instead of sector_t
  udf: remove redundant buffer_head.h includes
  udf: remove else after return in __load_block_bitmap()
  udf: remove unused variable in udf_table_free_blocks()
  quota: Fix maximum quota limit settings
  quota: reorder flags in quota state
  quota: paranoia: check quota tree root
  quota: optimize i_dquot access
  quota: Hook up Q_XSETQLIM for id 0 to ->set_info
  xfs: Add support for Q_SETINFO
  quota: Make ->set_info use structure with neccesary info to VFS and XFS
  quota: Remove ->get_xstate and ->get_xstatev callbacks
  gfs2: Convert to using ->get_state callback
  xfs: Convert to using ->get_state callback
  quota: Wire up Q_GETXSTATE and Q_GETXSTATV calls to work with ->get_state
  ...

2 files changed, 82 insertions, 22 deletions

diff --git a/include/linux/quota.h b/include/linux/quota.h
index d534e8ed308a..b2505acfd3c0 100644
--- a/include/linux/quota.h
+++ b/include/linux/quota.h
@@ -50,6 +50,7 @@
 
 #undef USRQUOTA
 #undef GRPQUOTA
+#undef PRJQUOTA
 enum quota_type {
         USRQUOTA = 0,           /* element used for user quotas */
         GRPQUOTA = 1,           /* element used for group quotas */
@@ -319,6 +320,7 @@ struct dquot_operations {
         /* get reserved quota for delayed alloc, value returned is managed by
          * quota code only */
         qsize_t *(*get_reserved_space) (struct inode *);
+        int (*get_projid) (struct inode *, kprojid_t *);/* Get project ID */
 };
 
 struct path;
@@ -344,7 +346,10 @@ struct qc_dqblk {
         int d_rt_spc_warns;     /* # warnings issued wrt RT space */
 };
 
-/* Field specifiers for ->set_dqblk() in struct qc_dqblk */
+/*
+ * Field specifiers for ->set_dqblk() in struct qc_dqblk and also for
+ * ->set_info() in struct qc_info
+ */
 #define QC_INO_SOFT     (1<<0)
 #define QC_INO_HARD     (1<<1)
 #define QC_SPC_SOFT     (1<<2)
@@ -365,6 +370,51 @@ struct qc_dqblk {
 #define QC_INO_COUNT    (1<<13)
 #define QC_RT_SPACE     (1<<14)
 #define QC_ACCT_MASK (QC_SPACE | QC_INO_COUNT | QC_RT_SPACE)
+#define QC_FLAGS        (1<<15)
+
+#define QCI_SYSFILE             (1 << 0)        /* Quota file is hidden from userspace */
+#define QCI_ROOT_SQUASH         (1 << 1)        /* Root squash turned on */
+#define QCI_ACCT_ENABLED        (1 << 2)        /* Quota accounting enabled */
+#define QCI_LIMITS_ENFORCED     (1 << 3)        /* Quota limits enforced */
+
+/* Structures for communicating via ->get_state */
+struct qc_type_state {
+        unsigned int flags;             /* Flags QCI_* */
+        unsigned int spc_timelimit;     /* Time after which space softlimit is
+                                         * enforced */
+        unsigned int ino_timelimit;     /* Ditto for inode softlimit */
+        unsigned int rt_spc_timelimit;  /* Ditto for real-time space */
+        unsigned int spc_warnlimit;     /* Limit for number of space warnings */
+        unsigned int ino_warnlimit;     /* Ditto for inodes */
+        unsigned int rt_spc_warnlimit;  /* Ditto for real-time space */
+        unsigned long long ino;         /* Inode number of quota file */
+        blkcnt_t blocks;                /* Number of 512-byte blocks in the file */
+        blkcnt_t nextents;              /* Number of extents in the file */
+};
+
+struct qc_state {
+        unsigned int s_incoredqs;       /* Number of dquots in core */
+        /*
+         * Per quota type information. The array should really have
+         * max(MAXQUOTAS, XQM_MAXQUOTAS) entries. BUILD_BUG_ON in
+         * quota_getinfo() makes sure XQM_MAXQUOTAS is large enough.  Once VFS
+         * supports project quotas, this can be changed to MAXQUOTAS
+         */
+        struct qc_type_state s_state[XQM_MAXQUOTAS];
+};
+
+/* Structure for communicating via ->set_info */
+struct qc_info {
+        int i_fieldmask;        /* mask of fields to change in ->set_info() */
+        unsigned int i_flags;           /* Flags QCI_* */
+        unsigned int i_spc_timelimit;   /* Time after which space softlimit is
+                                         * enforced */
+        unsigned int i_ino_timelimit;   /* Ditto for inode softlimit */
+        unsigned int i_rt_spc_timelimit;/* Ditto for real-time space */
+        unsigned int i_spc_warnlimit;   /* Limit for number of space warnings */
+        unsigned int i_ino_warnlimit;   /* Limit for number of inode warnings */
+        unsigned int i_rt_spc_warnlimit;        /* Ditto for real-time space */
+};
 
 /* Operations handling requests from userspace */
 struct quotactl_ops {
@@ -373,12 +423,10 @@ struct quotactl_ops {
         int (*quota_enable)(struct super_block *, unsigned int);
         int (*quota_disable)(struct super_block *, unsigned int);
         int (*quota_sync)(struct super_block *, int);
-        int (*get_info)(struct super_block *, int, struct if_dqinfo *);
-        int (*set_info)(struct super_block *, int, struct if_dqinfo *);
+        int (*set_info)(struct super_block *, int, struct qc_info *);
         int (*get_dqblk)(struct super_block *, struct kqid, struct qc_dqblk *);
         int (*set_dqblk)(struct super_block *, struct kqid, struct qc_dqblk *);
-        int (*get_xstate)(struct super_block *, struct fs_quota_stat *);
-        int (*get_xstatev)(struct super_block *, struct fs_quota_statv *);
+        int (*get_state)(struct super_block *, struct qc_state *);
         int (*rm_xquota)(struct super_block *, unsigned int);
 };
 
@@ -389,7 +437,19 @@ struct quota_format_type {
         struct quota_format_type *qf_next;
 };
 
-/* Quota state flags - they actually come in two flavors - for users and groups */
+/**
+ * Quota state flags - they actually come in two flavors - for users and groups.
+ *
+ * Actual typed flags layout:
+ *                              USRQUOTA        GRPQUOTA
+ *  DQUOT_USAGE_ENABLED         0x0001          0x0002
+ *  DQUOT_LIMITS_ENABLED        0x0004          0x0008
+ *  DQUOT_SUSPENDED             0x0010          0x0020
+ *
+ * Following bits are used for non-typed flags:
+ *  DQUOT_QUOTA_SYS_FILE        0x0040
+ *  DQUOT_NEGATIVE_USAGE        0x0080
+ */
 enum {
         _DQUOT_USAGE_ENABLED = 0,               /* Track disk usage for users */
         _DQUOT_LIMITS_ENABLED,                  /* Enforce quota limits for users */
@@ -398,9 +458,9 @@ enum {
                                                  * memory to turn them on */
         _DQUOT_STATE_FLAGS
 };
-#define DQUOT_USAGE_ENABLED     (1 << _DQUOT_USAGE_ENABLED)
-#define DQUOT_LIMITS_ENABLED    (1 << _DQUOT_LIMITS_ENABLED)
-#define DQUOT_SUSPENDED         (1 << _DQUOT_SUSPENDED)
+#define DQUOT_USAGE_ENABLED     (1 << _DQUOT_USAGE_ENABLED * MAXQUOTAS)
+#define DQUOT_LIMITS_ENABLED    (1 << _DQUOT_LIMITS_ENABLED * MAXQUOTAS)
+#define DQUOT_SUSPENDED         (1 << _DQUOT_SUSPENDED * MAXQUOTAS)
 #define DQUOT_STATE_FLAGS       (DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED | \
                                  DQUOT_SUSPENDED)
 /* Other quota flags */
@@ -414,15 +474,21 @@ enum {
                                                  */
 #define DQUOT_NEGATIVE_USAGE    (1 << (DQUOT_STATE_LAST + 1))
                                                /* Allow negative quota usage */
-
 static inline unsigned int dquot_state_flag(unsigned int flags, int type)
 {
-        return flags << _DQUOT_STATE_FLAGS * type;
+        return flags << type;
 }
 
 static inline unsigned int dquot_generic_flag(unsigned int flags, int type)
 {
-        return (flags >> _DQUOT_STATE_FLAGS * type) & DQUOT_STATE_FLAGS;
+        return (flags >> type) & DQUOT_STATE_FLAGS;
+}
+
+/* Bitmap of quota types where flag is set in flags */
+static __always_inline unsigned dquot_state_types(unsigned flags, unsigned flag)
+{
+        BUILD_BUG_ON_NOT_POWER_OF_2(flag);
+        return (flags / flag) & ((1 << MAXQUOTAS) - 1);
 }
 
 #ifdef CONFIG_QUOTA_NETLINK_INTERFACE
diff --git a/include/linux/quotaops.h b/include/linux/quotaops.h
index df73258cca47..77ca6601ff25 100644
--- a/include/linux/quotaops.h
+++ b/include/linux/quotaops.h
@@ -95,8 +95,8 @@ int dquot_quota_on_mount(struct super_block *sb, char *qf_name,
 int dquot_quota_off(struct super_block *sb, int type);
 int dquot_writeback_dquots(struct super_block *sb, int type);
 int dquot_quota_sync(struct super_block *sb, int type);
-int dquot_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
-int dquot_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
+int dquot_get_state(struct super_block *sb, struct qc_state *state);
+int dquot_set_dqinfo(struct super_block *sb, int type, struct qc_info *ii);
 int dquot_get_dqblk(struct super_block *sb, struct kqid id,
                 struct qc_dqblk *di);
 int dquot_set_dqblk(struct super_block *sb, struct kqid id,
@@ -134,10 +134,7 @@ static inline bool sb_has_quota_suspended(struct super_block *sb, int type)
 
 static inline unsigned sb_any_quota_suspended(struct super_block *sb)
 {
-        unsigned type, tmsk = 0;
-        for (type = 0; type < MAXQUOTAS; type++)
-                tmsk |= sb_has_quota_suspended(sb, type) << type;
-        return tmsk;
+        return dquot_state_types(sb_dqopt(sb)->flags, DQUOT_SUSPENDED);
 }
 
 /* Does kernel know about any quota information for given sb + type? */
@@ -149,10 +146,7 @@ static inline bool sb_has_quota_loaded(struct super_block *sb, int type)
 
 static inline unsigned sb_any_quota_loaded(struct super_block *sb)
 {
-        unsigned type, tmsk = 0;
-        for (type = 0; type < MAXQUOTAS; type++)
-                tmsk |= sb_has_quota_loaded(sb, type) << type;
-        return  tmsk;
+        return dquot_state_types(sb_dqopt(sb)->flags, DQUOT_USAGE_ENABLED);
 }
 
 static inline bool sb_has_quota_active(struct super_block *sb, int type)