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author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
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committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/fs/quota/quota_v2.c | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
download | FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.gz FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.bz2 FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.zip |
Moved, renamed, and deleted files
The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/fs/quota/quota_v2.c')
-rw-r--r-- | ANDROID_3.4.5/fs/quota/quota_v2.c | 336 |
1 files changed, 0 insertions, 336 deletions
diff --git a/ANDROID_3.4.5/fs/quota/quota_v2.c b/ANDROID_3.4.5/fs/quota/quota_v2.c deleted file mode 100644 index f1ab3604..00000000 --- a/ANDROID_3.4.5/fs/quota/quota_v2.c +++ /dev/null @@ -1,336 +0,0 @@ -/* - * vfsv0 quota IO operations on file - */ - -#include <linux/errno.h> -#include <linux/fs.h> -#include <linux/mount.h> -#include <linux/dqblk_v2.h> -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/module.h> -#include <linux/slab.h> -#include <linux/quotaops.h> - -#include <asm/byteorder.h> - -#include "quota_tree.h" -#include "quotaio_v2.h" - -MODULE_AUTHOR("Jan Kara"); -MODULE_DESCRIPTION("Quota format v2 support"); -MODULE_LICENSE("GPL"); - -#define __QUOTA_V2_PARANOIA - -static void v2r0_mem2diskdqb(void *dp, struct dquot *dquot); -static void v2r0_disk2memdqb(struct dquot *dquot, void *dp); -static int v2r0_is_id(void *dp, struct dquot *dquot); -static void v2r1_mem2diskdqb(void *dp, struct dquot *dquot); -static void v2r1_disk2memdqb(struct dquot *dquot, void *dp); -static int v2r1_is_id(void *dp, struct dquot *dquot); - -static struct qtree_fmt_operations v2r0_qtree_ops = { - .mem2disk_dqblk = v2r0_mem2diskdqb, - .disk2mem_dqblk = v2r0_disk2memdqb, - .is_id = v2r0_is_id, -}; - -static struct qtree_fmt_operations v2r1_qtree_ops = { - .mem2disk_dqblk = v2r1_mem2diskdqb, - .disk2mem_dqblk = v2r1_disk2memdqb, - .is_id = v2r1_is_id, -}; - -#define QUOTABLOCK_BITS 10 -#define QUOTABLOCK_SIZE (1 << QUOTABLOCK_BITS) - -static inline qsize_t v2_stoqb(qsize_t space) -{ - return (space + QUOTABLOCK_SIZE - 1) >> QUOTABLOCK_BITS; -} - -static inline qsize_t v2_qbtos(qsize_t blocks) -{ - return blocks << QUOTABLOCK_BITS; -} - -static int v2_read_header(struct super_block *sb, int type, - struct v2_disk_dqheader *dqhead) -{ - ssize_t size; - - size = sb->s_op->quota_read(sb, type, (char *)dqhead, - sizeof(struct v2_disk_dqheader), 0); - if (size != sizeof(struct v2_disk_dqheader)) { - quota_error(sb, "Failed header read: expected=%zd got=%zd", - sizeof(struct v2_disk_dqheader), size); - return 0; - } - return 1; -} - -/* Check whether given file is really vfsv0 quotafile */ -static int v2_check_quota_file(struct super_block *sb, int type) -{ - struct v2_disk_dqheader dqhead; - static const uint quota_magics[] = V2_INITQMAGICS; - static const uint quota_versions[] = V2_INITQVERSIONS; - - if (!v2_read_header(sb, type, &dqhead)) - return 0; - if (le32_to_cpu(dqhead.dqh_magic) != quota_magics[type] || - le32_to_cpu(dqhead.dqh_version) > quota_versions[type]) - return 0; - return 1; -} - -/* Read information header from quota file */ -static int v2_read_file_info(struct super_block *sb, int type) -{ - struct v2_disk_dqinfo dinfo; - struct v2_disk_dqheader dqhead; - struct mem_dqinfo *info = sb_dqinfo(sb, type); - struct qtree_mem_dqinfo *qinfo; - ssize_t size; - unsigned int version; - - if (!v2_read_header(sb, type, &dqhead)) - return -1; - version = le32_to_cpu(dqhead.dqh_version); - if ((info->dqi_fmt_id == QFMT_VFS_V0 && version != 0) || - (info->dqi_fmt_id == QFMT_VFS_V1 && version != 1)) - return -1; - - size = sb->s_op->quota_read(sb, type, (char *)&dinfo, - sizeof(struct v2_disk_dqinfo), V2_DQINFOOFF); - if (size != sizeof(struct v2_disk_dqinfo)) { - quota_error(sb, "Can't read info structure"); - return -1; - } - info->dqi_priv = kmalloc(sizeof(struct qtree_mem_dqinfo), GFP_NOFS); - if (!info->dqi_priv) { - printk(KERN_WARNING - "Not enough memory for quota information structure.\n"); - return -ENOMEM; - } - qinfo = info->dqi_priv; - if (version == 0) { - /* limits are stored as unsigned 32-bit data */ - info->dqi_maxblimit = 0xffffffff; - info->dqi_maxilimit = 0xffffffff; - } else { - /* used space is stored as unsigned 64-bit value */ - info->dqi_maxblimit = 0xffffffffffffffffULL; /* 2^64-1 */ - info->dqi_maxilimit = 0xffffffffffffffffULL; - } - info->dqi_bgrace = le32_to_cpu(dinfo.dqi_bgrace); - info->dqi_igrace = le32_to_cpu(dinfo.dqi_igrace); - info->dqi_flags = le32_to_cpu(dinfo.dqi_flags); - qinfo->dqi_sb = sb; - qinfo->dqi_type = type; - qinfo->dqi_blocks = le32_to_cpu(dinfo.dqi_blocks); - qinfo->dqi_free_blk = le32_to_cpu(dinfo.dqi_free_blk); - qinfo->dqi_free_entry = le32_to_cpu(dinfo.dqi_free_entry); - qinfo->dqi_blocksize_bits = V2_DQBLKSIZE_BITS; - qinfo->dqi_usable_bs = 1 << V2_DQBLKSIZE_BITS; - qinfo->dqi_qtree_depth = qtree_depth(qinfo); - if (version == 0) { - qinfo->dqi_entry_size = sizeof(struct v2r0_disk_dqblk); - qinfo->dqi_ops = &v2r0_qtree_ops; - } else { - qinfo->dqi_entry_size = sizeof(struct v2r1_disk_dqblk); - qinfo->dqi_ops = &v2r1_qtree_ops; - } - return 0; -} - -/* Write information header to quota file */ -static int v2_write_file_info(struct super_block *sb, int type) -{ - struct v2_disk_dqinfo dinfo; - struct mem_dqinfo *info = sb_dqinfo(sb, type); - struct qtree_mem_dqinfo *qinfo = info->dqi_priv; - ssize_t size; - - spin_lock(&dq_data_lock); - info->dqi_flags &= ~DQF_INFO_DIRTY; - dinfo.dqi_bgrace = cpu_to_le32(info->dqi_bgrace); - dinfo.dqi_igrace = cpu_to_le32(info->dqi_igrace); - dinfo.dqi_flags = cpu_to_le32(info->dqi_flags & DQF_MASK); - spin_unlock(&dq_data_lock); - dinfo.dqi_blocks = cpu_to_le32(qinfo->dqi_blocks); - dinfo.dqi_free_blk = cpu_to_le32(qinfo->dqi_free_blk); - dinfo.dqi_free_entry = cpu_to_le32(qinfo->dqi_free_entry); - size = sb->s_op->quota_write(sb, type, (char *)&dinfo, - sizeof(struct v2_disk_dqinfo), V2_DQINFOOFF); - if (size != sizeof(struct v2_disk_dqinfo)) { - quota_error(sb, "Can't write info structure"); - return -1; - } - return 0; -} - -static void v2r0_disk2memdqb(struct dquot *dquot, void *dp) -{ - struct v2r0_disk_dqblk *d = dp, empty; - struct mem_dqblk *m = &dquot->dq_dqb; - - m->dqb_ihardlimit = le32_to_cpu(d->dqb_ihardlimit); - m->dqb_isoftlimit = le32_to_cpu(d->dqb_isoftlimit); - m->dqb_curinodes = le32_to_cpu(d->dqb_curinodes); - m->dqb_itime = le64_to_cpu(d->dqb_itime); - m->dqb_bhardlimit = v2_qbtos(le32_to_cpu(d->dqb_bhardlimit)); - m->dqb_bsoftlimit = v2_qbtos(le32_to_cpu(d->dqb_bsoftlimit)); - m->dqb_curspace = le64_to_cpu(d->dqb_curspace); - m->dqb_btime = le64_to_cpu(d->dqb_btime); - /* We need to escape back all-zero structure */ - memset(&empty, 0, sizeof(struct v2r0_disk_dqblk)); - empty.dqb_itime = cpu_to_le64(1); - if (!memcmp(&empty, dp, sizeof(struct v2r0_disk_dqblk))) - m->dqb_itime = 0; -} - -static void v2r0_mem2diskdqb(void *dp, struct dquot *dquot) -{ - struct v2r0_disk_dqblk *d = dp; - struct mem_dqblk *m = &dquot->dq_dqb; - struct qtree_mem_dqinfo *info = - sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv; - - d->dqb_ihardlimit = cpu_to_le32(m->dqb_ihardlimit); - d->dqb_isoftlimit = cpu_to_le32(m->dqb_isoftlimit); - d->dqb_curinodes = cpu_to_le32(m->dqb_curinodes); - d->dqb_itime = cpu_to_le64(m->dqb_itime); - d->dqb_bhardlimit = cpu_to_le32(v2_stoqb(m->dqb_bhardlimit)); - d->dqb_bsoftlimit = cpu_to_le32(v2_stoqb(m->dqb_bsoftlimit)); - d->dqb_curspace = cpu_to_le64(m->dqb_curspace); - d->dqb_btime = cpu_to_le64(m->dqb_btime); - d->dqb_id = cpu_to_le32(dquot->dq_id); - if (qtree_entry_unused(info, dp)) - d->dqb_itime = cpu_to_le64(1); -} - -static int v2r0_is_id(void *dp, struct dquot *dquot) -{ - struct v2r0_disk_dqblk *d = dp; - struct qtree_mem_dqinfo *info = - sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv; - - if (qtree_entry_unused(info, dp)) - return 0; - return le32_to_cpu(d->dqb_id) == dquot->dq_id; -} - -static void v2r1_disk2memdqb(struct dquot *dquot, void *dp) -{ - struct v2r1_disk_dqblk *d = dp, empty; - struct mem_dqblk *m = &dquot->dq_dqb; - - m->dqb_ihardlimit = le64_to_cpu(d->dqb_ihardlimit); - m->dqb_isoftlimit = le64_to_cpu(d->dqb_isoftlimit); - m->dqb_curinodes = le64_to_cpu(d->dqb_curinodes); - m->dqb_itime = le64_to_cpu(d->dqb_itime); - m->dqb_bhardlimit = v2_qbtos(le64_to_cpu(d->dqb_bhardlimit)); - m->dqb_bsoftlimit = v2_qbtos(le64_to_cpu(d->dqb_bsoftlimit)); - m->dqb_curspace = le64_to_cpu(d->dqb_curspace); - m->dqb_btime = le64_to_cpu(d->dqb_btime); - /* We need to escape back all-zero structure */ - memset(&empty, 0, sizeof(struct v2r1_disk_dqblk)); - empty.dqb_itime = cpu_to_le64(1); - if (!memcmp(&empty, dp, sizeof(struct v2r1_disk_dqblk))) - m->dqb_itime = 0; -} - -static void v2r1_mem2diskdqb(void *dp, struct dquot *dquot) -{ - struct v2r1_disk_dqblk *d = dp; - struct mem_dqblk *m = &dquot->dq_dqb; - struct qtree_mem_dqinfo *info = - sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv; - - d->dqb_ihardlimit = cpu_to_le64(m->dqb_ihardlimit); - d->dqb_isoftlimit = cpu_to_le64(m->dqb_isoftlimit); - d->dqb_curinodes = cpu_to_le64(m->dqb_curinodes); - d->dqb_itime = cpu_to_le64(m->dqb_itime); - d->dqb_bhardlimit = cpu_to_le64(v2_stoqb(m->dqb_bhardlimit)); - d->dqb_bsoftlimit = cpu_to_le64(v2_stoqb(m->dqb_bsoftlimit)); - d->dqb_curspace = cpu_to_le64(m->dqb_curspace); - d->dqb_btime = cpu_to_le64(m->dqb_btime); - d->dqb_id = cpu_to_le32(dquot->dq_id); - if (qtree_entry_unused(info, dp)) - d->dqb_itime = cpu_to_le64(1); -} - -static int v2r1_is_id(void *dp, struct dquot *dquot) -{ - struct v2r1_disk_dqblk *d = dp; - struct qtree_mem_dqinfo *info = - sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv; - - if (qtree_entry_unused(info, dp)) - return 0; - return le32_to_cpu(d->dqb_id) == dquot->dq_id; -} - -static int v2_read_dquot(struct dquot *dquot) -{ - return qtree_read_dquot(sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv, dquot); -} - -static int v2_write_dquot(struct dquot *dquot) -{ - return qtree_write_dquot(sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv, dquot); -} - -static int v2_release_dquot(struct dquot *dquot) -{ - return qtree_release_dquot(sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv, dquot); -} - -static int v2_free_file_info(struct super_block *sb, int type) -{ - kfree(sb_dqinfo(sb, type)->dqi_priv); - return 0; -} - -static const struct quota_format_ops v2_format_ops = { - .check_quota_file = v2_check_quota_file, - .read_file_info = v2_read_file_info, - .write_file_info = v2_write_file_info, - .free_file_info = v2_free_file_info, - .read_dqblk = v2_read_dquot, - .commit_dqblk = v2_write_dquot, - .release_dqblk = v2_release_dquot, -}; - -static struct quota_format_type v2r0_quota_format = { - .qf_fmt_id = QFMT_VFS_V0, - .qf_ops = &v2_format_ops, - .qf_owner = THIS_MODULE -}; - -static struct quota_format_type v2r1_quota_format = { - .qf_fmt_id = QFMT_VFS_V1, - .qf_ops = &v2_format_ops, - .qf_owner = THIS_MODULE -}; - -static int __init init_v2_quota_format(void) -{ - int ret; - - ret = register_quota_format(&v2r0_quota_format); - if (ret) - return ret; - return register_quota_format(&v2r1_quota_format); -} - -static void __exit exit_v2_quota_format(void) -{ - unregister_quota_format(&v2r0_quota_format); - unregister_quota_format(&v2r1_quota_format); -} - -module_init(init_v2_quota_format); -module_exit(exit_v2_quota_format); |