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author | Dave Chinner <david@fromorbit.com> | 2016-07-20 01:54:59 (GMT) |
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committer | Dave Chinner <david@fromorbit.com> | 2016-07-20 01:54:59 (GMT) |
commit | dc4113d2433e01b06685743552d99573c9d470f3 (patch) | |
tree | 7962a56c283c90f8415f01e8f04d61495ce6cd7d /fs/xfs/libxfs | |
parent | b47ec80bfe1eadd530a13522890d43d71eda10f8 (diff) | |
parent | aa2dd0ad4d6d7dd85bb13ed64b872803be046f96 (diff) | |
download | linux-dc4113d2433e01b06685743552d99573c9d470f3.tar.xz |
Merge branch 'xfs-4.8-dir2-sf-fixes' into for-next
Diffstat (limited to 'fs/xfs/libxfs')
-rw-r--r-- | fs/xfs/libxfs/xfs_da_format.c | 31 | ||||
-rw-r--r-- | fs/xfs/libxfs/xfs_da_format.h | 43 | ||||
-rw-r--r-- | fs/xfs/libxfs/xfs_dir2_sf.c | 38 |
3 files changed, 37 insertions, 75 deletions
diff --git a/fs/xfs/libxfs/xfs_da_format.c b/fs/xfs/libxfs/xfs_da_format.c index 9d624a6..f1e8d4d 100644 --- a/fs/xfs/libxfs/xfs_da_format.c +++ b/fs/xfs/libxfs/xfs_da_format.c @@ -40,8 +40,7 @@ xfs_dir2_sf_entsize( int count = sizeof(struct xfs_dir2_sf_entry); /* namelen + offset */ count += len; /* name */ - count += hdr->i8count ? sizeof(xfs_dir2_ino8_t) : - sizeof(xfs_dir2_ino4_t); /* ino # */ + count += hdr->i8count ? XFS_INO64_SIZE : XFS_INO32_SIZE; /* ino # */ return count; } @@ -125,33 +124,33 @@ xfs_dir3_sfe_put_ftype( static xfs_ino_t xfs_dir2_sf_get_ino( struct xfs_dir2_sf_hdr *hdr, - xfs_dir2_inou_t *from) + __uint8_t *from) { if (hdr->i8count) - return get_unaligned_be64(&from->i8.i) & 0x00ffffffffffffffULL; + return get_unaligned_be64(from) & 0x00ffffffffffffffULL; else - return get_unaligned_be32(&from->i4.i); + return get_unaligned_be32(from); } static void xfs_dir2_sf_put_ino( struct xfs_dir2_sf_hdr *hdr, - xfs_dir2_inou_t *to, + __uint8_t *to, xfs_ino_t ino) { ASSERT((ino & 0xff00000000000000ULL) == 0); if (hdr->i8count) - put_unaligned_be64(ino, &to->i8.i); + put_unaligned_be64(ino, to); else - put_unaligned_be32(ino, &to->i4.i); + put_unaligned_be32(ino, to); } static xfs_ino_t xfs_dir2_sf_get_parent_ino( struct xfs_dir2_sf_hdr *hdr) { - return xfs_dir2_sf_get_ino(hdr, &hdr->parent); + return xfs_dir2_sf_get_ino(hdr, hdr->parent); } static void @@ -159,7 +158,7 @@ xfs_dir2_sf_put_parent_ino( struct xfs_dir2_sf_hdr *hdr, xfs_ino_t ino) { - xfs_dir2_sf_put_ino(hdr, &hdr->parent, ino); + xfs_dir2_sf_put_ino(hdr, hdr->parent, ino); } /* @@ -173,8 +172,7 @@ xfs_dir2_sfe_get_ino( struct xfs_dir2_sf_hdr *hdr, struct xfs_dir2_sf_entry *sfep) { - return xfs_dir2_sf_get_ino(hdr, - (xfs_dir2_inou_t *)&sfep->name[sfep->namelen]); + return xfs_dir2_sf_get_ino(hdr, &sfep->name[sfep->namelen]); } static void @@ -183,8 +181,7 @@ xfs_dir2_sfe_put_ino( struct xfs_dir2_sf_entry *sfep, xfs_ino_t ino) { - xfs_dir2_sf_put_ino(hdr, - (xfs_dir2_inou_t *)&sfep->name[sfep->namelen], ino); + xfs_dir2_sf_put_ino(hdr, &sfep->name[sfep->namelen], ino); } static xfs_ino_t @@ -192,8 +189,7 @@ xfs_dir3_sfe_get_ino( struct xfs_dir2_sf_hdr *hdr, struct xfs_dir2_sf_entry *sfep) { - return xfs_dir2_sf_get_ino(hdr, - (xfs_dir2_inou_t *)&sfep->name[sfep->namelen + 1]); + return xfs_dir2_sf_get_ino(hdr, &sfep->name[sfep->namelen + 1]); } static void @@ -202,8 +198,7 @@ xfs_dir3_sfe_put_ino( struct xfs_dir2_sf_entry *sfep, xfs_ino_t ino) { - xfs_dir2_sf_put_ino(hdr, - (xfs_dir2_inou_t *)&sfep->name[sfep->namelen + 1], ino); + xfs_dir2_sf_put_ino(hdr, &sfep->name[sfep->namelen + 1], ino); } diff --git a/fs/xfs/libxfs/xfs_da_format.h b/fs/xfs/libxfs/xfs_da_format.h index 8d4d8bc..685f23b 100644 --- a/fs/xfs/libxfs/xfs_da_format.h +++ b/fs/xfs/libxfs/xfs_da_format.h @@ -192,12 +192,6 @@ typedef __uint16_t xfs_dir2_data_off_t; typedef uint xfs_dir2_data_aoff_t; /* argument form */ /* - * Normalized offset (in a data block) of the entry, really xfs_dir2_data_off_t. - * Only need 16 bits, this is the byte offset into the single block form. - */ -typedef struct { __uint8_t i[2]; } __arch_pack xfs_dir2_sf_off_t; - -/* * Offset in data space of a data entry. */ typedef __uint32_t xfs_dir2_dataptr_t; @@ -214,22 +208,10 @@ typedef xfs_off_t xfs_dir2_off_t; */ typedef __uint32_t xfs_dir2_db_t; -/* - * Inode number stored as 8 8-bit values. - */ -typedef struct { __uint8_t i[8]; } xfs_dir2_ino8_t; - -/* - * Inode number stored as 4 8-bit values. - * Works a lot of the time, when all the inode numbers in a directory - * fit in 32 bits. - */ -typedef struct { __uint8_t i[4]; } xfs_dir2_ino4_t; +#define XFS_INO32_SIZE 4 +#define XFS_INO64_SIZE 8 +#define XFS_INO64_DIFF (XFS_INO64_SIZE - XFS_INO32_SIZE) -typedef union { - xfs_dir2_ino8_t i8; - xfs_dir2_ino4_t i4; -} xfs_dir2_inou_t; #define XFS_DIR2_MAX_SHORT_INUM ((xfs_ino_t)0xffffffffULL) /* @@ -246,39 +228,38 @@ typedef union { typedef struct xfs_dir2_sf_hdr { __uint8_t count; /* count of entries */ __uint8_t i8count; /* count of 8-byte inode #s */ - xfs_dir2_inou_t parent; /* parent dir inode number */ -} __arch_pack xfs_dir2_sf_hdr_t; + __uint8_t parent[8]; /* parent dir inode number */ +} __packed xfs_dir2_sf_hdr_t; typedef struct xfs_dir2_sf_entry { __u8 namelen; /* actual name length */ - xfs_dir2_sf_off_t offset; /* saved offset */ + __u8 offset[2]; /* saved offset */ __u8 name[]; /* name, variable size */ /* * A single byte containing the file type field follows the inode * number for version 3 directory entries. * - * A xfs_dir2_ino8_t or xfs_dir2_ino4_t follows here, at a - * variable offset after the name. + * A 64-bit or 32-bit inode number follows here, at a variable offset + * after the name. */ -} __arch_pack xfs_dir2_sf_entry_t; +} xfs_dir2_sf_entry_t; static inline int xfs_dir2_sf_hdr_size(int i8count) { return sizeof(struct xfs_dir2_sf_hdr) - - (i8count == 0) * - (sizeof(xfs_dir2_ino8_t) - sizeof(xfs_dir2_ino4_t)); + (i8count == 0) * XFS_INO64_DIFF; } static inline xfs_dir2_data_aoff_t xfs_dir2_sf_get_offset(xfs_dir2_sf_entry_t *sfep) { - return get_unaligned_be16(&sfep->offset.i); + return get_unaligned_be16(sfep->offset); } static inline void xfs_dir2_sf_put_offset(xfs_dir2_sf_entry_t *sfep, xfs_dir2_data_aoff_t off) { - put_unaligned_be16(off, &sfep->offset.i); + put_unaligned_be16(off, sfep->offset); } static inline struct xfs_dir2_sf_entry * diff --git a/fs/xfs/libxfs/xfs_dir2_sf.c b/fs/xfs/libxfs/xfs_dir2_sf.c index e5bb9cc..c6809ff 100644 --- a/fs/xfs/libxfs/xfs_dir2_sf.c +++ b/fs/xfs/libxfs/xfs_dir2_sf.c @@ -126,13 +126,12 @@ xfs_dir2_block_sfsize( /* * Calculate the new size, see if we should give up yet. */ - size = xfs_dir2_sf_hdr_size(i8count) + /* header */ - count + /* namelen */ - count * (uint)sizeof(xfs_dir2_sf_off_t) + /* offset */ - namelen + /* name */ - (i8count ? /* inumber */ - (uint)sizeof(xfs_dir2_ino8_t) * count : - (uint)sizeof(xfs_dir2_ino4_t) * count); + size = xfs_dir2_sf_hdr_size(i8count) + /* header */ + count * 3 * sizeof(u8) + /* namelen + offset */ + namelen + /* name */ + (i8count ? /* inumber */ + count * XFS_INO64_SIZE : + count * XFS_INO32_SIZE); if (size > XFS_IFORK_DSIZE(dp)) return size; /* size value is a failure */ } @@ -319,10 +318,7 @@ xfs_dir2_sf_addname( /* * Yes, adjust the inode size. old count + (parent + new) */ - incr_isize += - (sfp->count + 2) * - ((uint)sizeof(xfs_dir2_ino8_t) - - (uint)sizeof(xfs_dir2_ino4_t)); + incr_isize += (sfp->count + 2) * XFS_INO64_DIFF; objchange = 1; } @@ -897,11 +893,7 @@ xfs_dir2_sf_replace( int error; /* error return value */ int newsize; /* new inode size */ - newsize = - dp->i_df.if_bytes + - (sfp->count + 1) * - ((uint)sizeof(xfs_dir2_ino8_t) - - (uint)sizeof(xfs_dir2_ino4_t)); + newsize = dp->i_df.if_bytes + (sfp->count + 1) * XFS_INO64_DIFF; /* * Won't fit as shortform, convert to block then do replace. */ @@ -1022,10 +1014,7 @@ xfs_dir2_sf_toino4( /* * Compute the new inode size. */ - newsize = - oldsize - - (oldsfp->count + 1) * - ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)); + newsize = oldsize - (oldsfp->count + 1) * XFS_INO64_DIFF; xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK); xfs_idata_realloc(dp, newsize, XFS_DATA_FORK); /* @@ -1048,7 +1037,7 @@ xfs_dir2_sf_toino4( i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep), oldsfep = dp->d_ops->sf_nextentry(oldsfp, oldsfep)) { sfep->namelen = oldsfep->namelen; - sfep->offset = oldsfep->offset; + memcpy(sfep->offset, oldsfep->offset, sizeof(sfep->offset)); memcpy(sfep->name, oldsfep->name, sfep->namelen); dp->d_ops->sf_put_ino(sfp, sfep, dp->d_ops->sf_get_ino(oldsfp, oldsfep)); @@ -1098,10 +1087,7 @@ xfs_dir2_sf_toino8( /* * Compute the new inode size (nb: entry count + 1 for parent) */ - newsize = - oldsize + - (oldsfp->count + 1) * - ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)); + newsize = oldsize + (oldsfp->count + 1) * XFS_INO64_DIFF; xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK); xfs_idata_realloc(dp, newsize, XFS_DATA_FORK); /* @@ -1124,7 +1110,7 @@ xfs_dir2_sf_toino8( i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep), oldsfep = dp->d_ops->sf_nextentry(oldsfp, oldsfep)) { sfep->namelen = oldsfep->namelen; - sfep->offset = oldsfep->offset; + memcpy(sfep->offset, oldsfep->offset, sizeof(sfep->offset)); memcpy(sfep->name, oldsfep->name, sfep->namelen); dp->d_ops->sf_put_ino(sfp, sfep, dp->d_ops->sf_get_ino(oldsfp, oldsfep)); |